Abstract: The improvement of the competitiveness of the atmospheric environmental protection industry requires the optimization and improvement of the perspective of the entire industrial chain. Based on defining the concept of the entire industrial chain of the atmospheric environmental protection industry, the development status and problems of the industrial chains in the sub-sectors of the atmospheric environmental protection industry such as dust removal, desulfurization, denitrification, VOCs, and automobile exhaust treatment were analyzed from the upstream supply chain, midstream production chain, and downstream service chain. It proposes overall countermeasures to promote the balanced development of all links of the industrial chain from a vertical direction, broaden the field of atmospheric environmental protection industry and enrich product categories horizontally, including expanding the research and development of environmental protection materials and agents in various upstream industries, accelerating the research and development and design of key components in various upstream industries, accelerating the breakthrough of key technologies in upstream technologies, and strengthening the production capacity of midstream air pollution detection equipment. Keywords: atmospheric environmental protection industry; full industrial chain; value chain; optimization
1 Introduction
In recent years, my country's atmospheric environmental quality has continued to improve. By 2017, the goals set by the "Ten Atmospheric Measures" have been achieved as scheduled, and the industrial structure has been gradually optimized, especially the atmospheric pollution control industry (this article says: atmospheric environmental protection industry) has developed rapidly. In 2018, with the implementation of the "Three-Year Action Plan for Winning the Battle of Blue Sky", the atmospheric environmental protection industry entered a period of rapid development. However, from the perspective of the industrial chain, the atmospheric environmental protection industry still has problems such as imperfect chains and unbalanced development, especially the problems existing in the development of industrial chains in different industries such as dust removal, desulfurization, denitrification, and VOCs governance. It is also necessary to optimize from the perspective of the construction of the entire industrial chain. At present, domestic and foreign scholars have gradually begun to pay attention to the development of the atmospheric environmental protection industry, but few research on the atmospheric environmental protection industry from the perspective of the industrial chain, and fewer analysis and theoretical discussions on the entire atmospheric environmental protection industry. Foreign scholars have rarely been involved in the theoretical analysis of the construction of the entire industrial chain, but from the perspective of the main idea of the entire industrial chain, it is consistent with the vertical integration of the industrial chain and discussed by foreign scholars [1~3]. For example, Geyskens studied the utility of vertical integration from the perspective of transaction fees, indicating that output and behavior uncertainty encouraged enterprises to choose vertical integration, and technological uncertainty reduced the interest in vertical integration of enterprises [4]. Noriaki Matsushima and Tomomichi Mizuno research proposed that vertical integration can help achieve product differentiation and product strategic complementarity among enterprises, and found that large enterprises prefer vertical integration [5]. Domestic scholars mainly focus on the research on the construction of the entire industrial chain of agriculture (including food-grade biopharmaceuticals), textile industry, telecommunications industry, energy industry, automobile industry and cultural and creative industries [6, 7]. The focus of attention includes the distribution of interests in the entire industrial chain, the appreciation of value of the entire industrial chain, etc. Scholars generally believe that the entire industrial chain has the significant characteristics of diversifying risks and providing added value [8]. Therefore, exploring the construction and optimization of the entire industrial chain of the atmospheric environmental protection industry plays an important role in enhancing the competitiveness of the atmospheric environmental protection industry and promoting its development. This study defines the concept of the entire industrial chain of the atmospheric environmental protection industry for the first time, and analyzes in detail the construction of the entire industrial chain of various sub-field industries of the atmospheric environmental protection industry, and proposes countermeasures to optimize the entire industrial chain in response to problems in different industries. On the one hand, the research results are the deepening of the theory of atmospheric environmental protection industry, and on the other hand, they provide reference for the construction and optimization of the entire industrial chain of my country's atmospheric environmental protection industry.
2 Definition of the full industrial chain of the atmosphere environmental protection industry
2.1 Atmospheric environmental protection industry chain
At present, few research in the academic community targets the atmospheric environmental protection industry and the atmospheric environmental protection industry chain. In a few studies, it is called the atmospheric pollution control industry [9]. The atmospheric environmental protection industry chain proposed in this study is a chain structure consisting of multiple departments such as technology, products, equipment, information, and services that provide atmospheric pollution control, with products and technologies as investment, providing users with products and services for atmospheric pollution control, and oriented towards value appreciation, to meet users' goal of improving atmospheric environmental quality [10].
2.2 Whole industry chain
According to research, the term industrial chain was first proposed by Chinese scholars, but domestic scholars have not yet formed a unified understanding of the concept of industrial chain. Some scholars have compared and analyzed the definitions proposed by domestic scholars and gave the scientific definition of the industrial chain as enterprises in the same industry or different industries. They use products as the object, input and output as the link, value appreciation as the orientation, and meet user needs as the goal, and are based on specific logical connections and space-time layouts [11].
The concept of the entire industrial chain is a newer concept. The term "full industrial chain" development strategy proposed by COFCO Group in 2009. Since then, COFCO Group has begun to march towards the source and terminal of the agricultural and sideline food import and export trade as its main business, and has formed a complete industrial chain system for crop planting, processing, transportation and sales, etc. [12]. The initial full industrial chain was mainly aimed at agriculture and was realized by one enterprise. Since then, the concept and strategy of the entire industrial chain have emerged in the development of agriculture and various agricultural products, and have also expanded to industries such as textiles, clothing, and electronic information [13-15]. At present, the academic community has not yet had a relatively authoritative definition of the concept of the entire industrial chain. Based on the literature review, this study proposes that the entire industrial chain is the goal of enterprises with value appreciation. On the one hand, it continues to extend and expand to the upstream and downstream of the industrial chain; on the other hand, it continues to expand product diversity and relevance, and ultimately forms an industrial network structure. Based on the concept of the full industrial chain proposed in this study, the full industrial chain has two connotations. One is to start from the source of the industrial chain vertically, covering all links of the industrial chain such as raw material design, product research and development, production, and sales; the other is to continuously enrich product categories and industrial types horizontally. Therefore, the entire industrial chain is the expansion and extension of the industrial chain in a vertical and horizontal manner.
2.3 The entire industrial chain of the atmosphere environmental protection industry
According to the concepts of the atmospheric environmental protection industry chain, the entire industrial chain, etc., this study defines the concept of the entire industrial chain of the atmosphere environmental protection industry as: guided by value appreciation, aiming to meet users' improvement of atmospheric environmental quality, covering all links of the industrial chain such as research and development of atmospheric pollution control technology, products, equipment production, operation services, and other industrial chains, as well as an industrial chain network with continuously enriched categories in each link. Its connotation is mainly to include the upstream, midstream and downstream links of the atmospheric environmental protection industry chain in vertical direction, and to include the industrial chain network in various fields such as dust removal, desulfurization, denitrification, VOCs management, and motor vehicle exhaust gas treatment.
3 Analysis of the development status of the atmospheric environmental protection industry chain
Atmospheric environmental protection industry chain consists of three links: upstream supply chain, midstream production chain, and downstream service chain. According to the type of industry, the atmospheric environmental protection industry chain can be divided into desulfurization industry industry chain, denitrification industry industry chain, dust removal industry industry chain, automobile exhaust gas treatment industry chain, VOCs treatment industry chain, etc. Analysis is conducted from the current development status and scale of supply chains, production chains and service chains in several major industrial sub-sectors such as dust removal, desulfurization, denitrification, VOCs, and automotive exhaust treatment.
3.1 Dust removal (fixed source) industrial chain analysis
3.1.1 Upstream supply chain
Overall, my country's electro-dust removal and bag dust removal technology has reached the international advanced level, and it has fully possessed the ability to complete the EPC of the air pollution control project by relying on its own technology and strength. my country's electrodust removal technology is widely used in various industrial industries such as coal-fired power stations, cement, steel, and nonferrous metals. Bag dust removal has made significant progress in overall performance, large-scale, special fibers and filter materials, and has been widely used in coal-fired power plants, cement kilns, waste incineration flue gas purification, thermal power plants desulfurization and dust removal. Large pulse bag dust collectors and filter bag sewing technology has reached the international advanced level.
In recent years, as emission standards become stricter, many advanced dust removal technologies have emerged. New electrodust removal technologies mainly include: low temperature, low temperature, wet type, rotary electrode type, electrocondensation, new electrodust removal power supply technologies (high frequency power supply, medium frequency power supply and three-phase power supply).The improvement of the core fibers and filter materials of bag dust collectors reflects the significant advancement in the technology of the bag dust removal industry. In recent years, core fibers and filter materials, including aramid, polyphenylene sulfide, polyimide and polytetrafluoroethylene, have been domestically produced, promoting the development of the bag dust removal industry.
my country's maximum designed air volume for bag dust removal single machine has increased from the original 1 million m3/h to 2.5 million m3/h, and the maximum air volume for a single project has reached 5.6 million m3/h, and all technical performance indicators can reach the international advanced level. my country has carried out key research on the innovation of new structural innovations of low-resistance and high-efficiency bag dust collectors, and has developed new technologies such as straight-through bag dust collectors, electric bag dust collectors, airflow distribution and surface microfiber filters, and the equipment operation resistance has been greatly reduced. Large-scale equipment design is the most significant sign of the progress of bag dust removal technology. my country has made breakthroughs in key technologies such as structural safety, stress calculation, airflow distribution, modular design, transportation and installation, filter material manufacturing and filter bag sewing technology of large bag dust collectors [16, 17].
3.1.2 Midstream production chain
From the market analysis of the electro-dust removal industry from 2000 to 2015, it can be seen that except for the decline in the market due to the global financial crisis in 2009, the market in the electro-dust removal industry continued to grow in the rest of the years. Electrodust removal has now become an industry with well-equipped equipment. At present, there are more than 200 enterprises engaged in the production of electrodust removal machines in my country, and it has become a major producer of electrodust removal machines in the world. The number of electrodust removal machines produced by my country ranks first in the world. The electrodust removal machines produced by China can not only meet domestic demand, but also exported to dozens of countries and regions. The electrodust removal industry is one of the most competitive industries in my country's environmental protection industry that can compete with foreign manufacturers [18, 19]. In 2014, with the increase of environmental protection requirements, the demand for electrostatic precipitation market continued to increase, with sales revenue of electrostatic precipitation of 21.4 billion yuan and exports of 1.36 billion yuan. In 2015, the national sales revenue of electrostatic precipitation of approximately 14.34 billion yuan. The application of
bag dust collector has covered the entire industrial field and has a rich product series. It is the main dust collector for my country's major atmospheric pollutant control, especially PM2.5 emission control. However, due to the fierce competition for overcapacity in the bag dust removal industry, the total output value of the industry has continued to decline in recent years, and foreign engineering general contracting and equipment complete sets have decreased, and exports have also shown a downward trend. The market of the bag dust removal equipment industry is relatively dispersed and the concentration is not high. The competitive advantages and innovation driving force of enterprises are not particularly obvious, but the total output value and profit of high-temperature filter materials, the main consumable for bag dust removal, has increased.
3.1.3 Downstream service chain
bag dust collector operation and management requires very professional technology. Many companies using bag dust collectors are equipped with good bag dust collectors, but lack long-term and reliable management and operation and maintenance. The backbone enterprises of bag dust collectors in my country have the qualifications to provide bag dust collector equipment and environmental protection engineering general contracting to international markets including developed countries, as well as the ability to provide bag dust collector technology, equipment and accessories [16, 17]. See Figure 1 for the dust removal industry chain.
3.2 Desulfurization and denitrification industry chain
3.2.1 Upstream supply chain
flue gas desulfurization technology can be divided into wet flue gas desulfurization and dry flue gas desulfurization according to the state of the reactants. my country's wet desulfurization technology comes from the technology introduction in the 1990s. Under the guidance of the former National Economic and Trade Commission, the power department has successively introduced relatively advanced and mature desulfurization processes from abroad. The wet desulfurization technology applied to large units mainly includes spray tower technology and liquid column tower technology, and is mainly single tower, that is, wet desulfurization single tower strengthening technology. Currently, the most widely used technologies include rotary coupling wet desulfurization technology, boiling foam desulfurization technology, and dual-circulation wet desulfurization technology [20, 21]. In the field of flue gas desulfurization, my country already has the mainstream flue gas desulfurization process technology with independent intellectual property rights of 300,000 kilowatt thermal power units, but it still lacks independent intellectual property rights in the desulfurization process technology of large thermal power units. The main dry flue gas desulfurization technology includes spray drying, in-furnace calcium spraying method and circulating fluidized bed smoke exhaust desulfurization method.
dry flue gas desulfurization technology is suitable for situations where sulfur content is less than 2%, and site and funds are restricted. Currently, circulating fluidized bed smoke exhaust desulfurization method (CFB) is widely used in domestic power plants, second only to the application of limestone wet method [20, 21]. In terms of denitrification technology, the main ones are low-nitrogen combustion technology, selective catalytic reduction technology (SCR), and selective non-catalytic reduction technology (SNCR). In recent years, the main trend is to further optimize low-nitrogen combustion systems and carry out combined applications of technologies in ultra-low emissions, such as low-nitrogen combustion + SNCR + SCR denitrification, low-nitrogen combustion + SCR denitrification (increase the number of catalyst layers). my country's flue gas denitrification technology is mainly introduced, and there is a lack of technology with independent intellectual property rights. The above denitrification technology has been widely used in engineering construction.
3.2.2 Midstream production chain
The midstream production chain mainly involves the production and manufacturing of desulfurization and denitrification related equipment, the installation of desulfurization and denitrification facilities, etc. desulfurization equipment manufacturing industry is divided into general equipment (such as fans, circulation pumps, valves, ball mills, etc.) and special equipment (such as defogging machines, spray systems, collectors, and cloth machines). General equipment has a large production scale, sufficient supply, and stable prices; most of the special equipment is customized to the flue gas desulfurization industry through desulfurization companies. Due to the complementary effect of the industry, the prices and supply volume are relatively stable [20, 21]. At present, there are many domestic desulfurization equipment manufacturers, rich product categories, and sufficient competition in the market structure. However, there are relatively few companies that can produce multiple categories of desulfurization equipment. Therefore, overall, there are many desulfurization equipment manufacturers but relatively dispersed.
As of the end of 2016, the national flue gas desulfurization unit capacity of thermal power plants has been put into operation for about 848 million kilowatts, accounting for 80.5% of the national thermal power unit capacity and 90.0% of the national coal-power unit capacity. The national flue gas desulfurization unit capacity of thermal power plants has been put into operation for about 864 million kilowatts, accounting for 82% of the national thermal power unit capacity and 91.7% of the national coal-power unit capacity. Judging from the current desulfurization and denitrification status of the steel industry in 2016, the installation rate of desulfurization and denitrification facilities is above 90%, but the market is chaotic, simple imitation, low quality and low price, and vicious competition are common; anti-corrosion, external insulation, by-product treatment and other links are missing; the facilities are not operating well, and there is generally a lack of effective operation and maintenance, the equipment failure rate is high, and the operation rate is low. Judging from the current desulfurization and denitrification status of the cement industry in 2016, the installation rate of denitrification devices in the cement industry exceeded 85%, but the emission standards are loose. SNCR technology equipment is widely used in the cement industry, but the denitrification efficiency is not high [20, 21]. The statistics of the scale of domestic desulfurization and denitrification industries in 2014 are shown in Table 1.
3.2.3 Downstream service chain
The downstream service chain is mainly the operation and management of desulfurization and denitrification equipment. The desulfurization franchise model has begun to gradually transform from the EPC model to the BOT model. Companies with operational management experience and BOT qualifications will usher in a good market situation. At present, the market size of denitrification franchise for denitrification is relatively small, with less than 10 participating companies. With the development of the thermal power denitrification industry, the market size of the franchise is expected to expand rapidly. The upstream and downstream relationships and market technical situations of the desulfurization and denitrification industry industry chain and the market technology are shown in Table 2.
3.3 VOCs governance industry chain
3.3.1 Upstream supply chain
volatile organic compounds (VOCs) management technologies mainly include adsorption and recovery, adsorption and concentration, catalytic combustion and high-temperature incineration, thermal combustion, low-volatility organic solvents and other technologies. At the same time, low-temperature plasma and bio-governance technologies are developing rapidly. Adsorption and recycling technology is currently the most widely used in the packaging and printing industry. Adsorption and concentration technology is widely used in spraying industries such as automobile manufacturing. Thermal thermal incineration technology and thermal catalytic combustion technology are gradually replacing traditional catalytic combustion and high-temperature incineration technology. At present, multiple technologies are widely used in combination. Because the VOCs are extremely complex and the compounds have different properties, it is often difficult to meet emission requirements by using a single governance technology. Multiple combination technologies are required, such as adsorption and concentration + incineration/absorption technology, low-temperature plasma + absorption/catalytic incineration, activated carbon adsorption and recovery + zeolite wheel adsorption and concentration technology + condensation and recovery technology, etc.At present, there are many technologies for VOCs management, but the technical level is uneven, and it is still low compared with the level of control of sulfur dioxide, nitrogen oxides, smoke and dust. The industry has not yet cultivated leading backbone enterprises with driving capabilities, and the vicious competition problem of low quality and low prices is more prominent.
3.3.2 Midstream Production Chain
At present, there are 200 to 300 enterprises in the country engaged in VOCs governance, of which about half are newly registered and established in the past three years or are managed by other governance industries such as dust removal, desulfurization, and denitrification. In 2014, the total output value of the VOCs governance industry was about 7 billion yuan, with a profit of 10% to 15%. In 2015, the global VOCs governance industry market size was 24 billion to 27 billion yuan, of which China accounted for 37% to 42% of the market share, the United States accounted for 17% to 19%, and the European Union accounted for 19% to 20%. In 2015, the market capacity of China's VOCs governance industry reached 10 billion yuan. VOCs governance equipment has huge market potential, and currently mature governance technologies (such as adsorption method, thermal combustion method, thermal catalytic combustion method, etc.) have supporting equipment industrialization. During the entire 13th Five-Year Plan period, with the pilot projects and standards for pollution discharge fees being introduced one after another, the scale of VOCs governance will exceed 150 billion yuan.
3.3.3 Downstream service chain
From the "12th Five-Year Plan" to the "13th Five-Year Plan", the VOCs policy system has gone through a process from scratch, and relevant policies have entered a period of intensive issuance. The 13th Five-Year Plan outline proposes to promote the control of total VOCs emissions in key areas and key industries, and the total emissions will drop by more than 10%. With the gradual implementation of the pollution discharge fee and subsidy policy for VOCs control, it will be conducive to the development of VOCs monitoring equipment and third-party operation service industries. Overall, the VOCs monitoring market space during the 13th Five-Year Plan period was 5.7 billion yuan, of which: the VOCs monitoring equipment market space was 3.35 billion yuan, and the third-party operation service market space was 2.35 billion yuan.
VOCs governance industry chain diagram 2.
3.4 Motor vehicle (mobile source) pollution control industry chain
3.4.1 Upstream supply chain
0 The upstream of the motor vehicle pollution control industry chain is mainly the research and development of various types of motor vehicle pollution prevention and control technologies. Including in-machine purification technology and out-machine purification technology. In-machine purification technology mainly includes exhaust gas recirculation technology and electronically controlled fuel injection system. There are slight differences for different motor vehicles, such as National V gasoline vehicle emission control technology (Engine system, on-board diagnostic system OBD performance optimization, on-board refueling oil and gas recovery system ORVR) [22]. The off-machine purification technology is mainly exhaust gas catalytic purification technology, among which catalysts are the core. Currently, precious metal catalysts and non-precious metal catalysts have been the most widely used, and rare earth catalysts are the new direction of research and development.
3.4.2 The midstream production chain
is mainly the production of motor vehicle management equipment, including in-use environmental protection equipment, new car environmental protection equipment, new energy vehicles and related products. For the growth of new cars, light and medium-sized diesel vehicles, heavy-duty diesel vehicles and light gasoline vehicles have an increase of 1.7 million units/year, 1.8 million units/year and 15 million units/year respectively. The environmental protection equipment of new cars requires 54 billion yuan, 90 billion yuan and 300 billion yuan each year. After these new cars become after-processing markets, there will be at least 30 billion yuan per year.
3.4.3 Downstream service chain
The downstream service chain mainly includes motor vehicle exhaust emission detection and monitoring services. At present, exhaust gas detection and monitoring technologies are relatively mature. In addition to special motor vehicle exhaust gas detection agencies, there are also environmental comprehensive service providers, and monitoring elements cover exhaust gas, air, etc.
4 Optimization measures for the entire industrial chain
According to the definition of the entire industrial chain of the atmospheric environmental protection industry, it is necessary to optimize the entire industrial chain of the atmospheric environmental protection industry, and to promote the balanced development of the upstream, midstream and downstream links vertically, expand the industrial fields of the atmospheric environmental protection industry horizontally, and enrich the product categories in the industrial field.
4.1 Promote the balanced development of all links of the industrial chain
The development of the up, middle and downstream links of the atmospheric environmental protection industry chain is unbalanced, especially the downstream service chain at the top of the value chain is still weak. Therefore, it is necessary to improve the comprehensive service capabilities of the atmospheric environmental service industry and promote the development of different categories of service industries.Improve the marketization, standardization, standardization and modernization of atmospheric environmental engineering construction and operation, improve the atmospheric environment consulting service industry, encourage the development of atmospheric environmental protection product certification and consultation, promote the development of atmospheric environmental trade and financial services industry, and encourage professional marketing and import and export trade of atmospheric environmental protection-related products.
4.2 Expand the research and development of environmentally friendly materials and agents in various upstream industries
For the dust removal industry, the filter materials and coated filter bags for bag dust collectors are mainly low-resistance, high-efficiency and durable aramid, polyphenylene sulfide (PPS), polyimide, polytetrafluoroethylene PTFE, anti-static fibers and filter materials, modified glass fiber/PTFE, composite fibers and filter materials such as P84 glass fiber composite needle felt, PTFE glass fiber composite needle felt and Nomex glass fiber composite needle felt, etc. The electrostatic dust removal materials are mainly corrosion-resistant and wear-resistant steel materials. The desulfurization industry mainly develops desulfurization agents such as heavy metal chelating agents and stabilizers such as desulfurization gypsum and wastewater. VOCs treatment materials are mainly research and development of molecular sieves such as activated carbon and zeolites, heat storage bodies such as ceramics, biological bacterial agents and fillers, and water-based coatings. Motor vehicle exhaust treatment materials are mainly selective catalytic reduction (SCR) catalysts with good sulfur resistance, activated carbon for carbon tanks, etc.
4.3 Accelerate the research and development and design of key components in various upstream industries
The focus of the dust removal industry is to accelerate the improvement of the blowing solenoid valves of the dust removal system of the key equipment for bag dust removal, the research and development of rotating electrodes of key equipment for electrostatic dust collectors, supporting power supply power supply (high frequency high voltage power supply, pulse high voltage power supply, power supply and three-phase high voltage power supply). The focus of the desulfurization industry is to strengthen the supply of key equipment including: corrosion-resistant and wear-resistant slurry circulation pumps, vacuum belt dewaterers, booster fans, etc. The focus of the denitrification industry is to accelerate the production and supply of reducing agent addition spray equipment, catalytic reduction reactors, key catalyst regeneration equipment, etc. The key equipment in the VOCs management industry is mainly adsorption and concentration and recovery devices, catalytic heat storage combustion equipment, bioreactors, low-temperature plasma reactors, etc. Key equipment for exhaust purification of motor vehicles include: diesel vehicles (including non-road mobile machinery) mainly include thin NOx catalyst LNC, NOx trap LNT, fine particulate filter DPF, particulate oxidation catalytic converter POC, catalytic oxidation conversion DOC, etc.; gasoline vehicles mainly include engines, vehicle-mounted diagnostic system OBD, vehicle-mounted refueling oil and gas recovery ORVR devices, etc.; motorcycles mainly include oil chemical, electrospray, catalytic converter and carbon tank.
4.4 Accelerate the breakthrough of key upstream technologies
Dust removal industry focuses on the development of new technologies for low temperature, low temperature, wet type, rotary electrode type, electrocoagulation, electro-dust removal supporting power supply power supply, etc., and focuses on the development of energy-saving and ash cleaning technology for bag dust collectors, online detection and replacement technology for bag damage, low resistance, high efficiency and durable filter materials and coating technology, especially filter materials and coating technology for high efficiency filtration of PM2.5. In addition, we must accelerate the development of durable filter materials, long-term low-resistance operation technology, etc., for power bag composite dust collectors to prevent ozone corrosion. The desulfurization industry focuses on studying low-resistance secondary series cyclic absorption technology, adding pallets in the absorption tower, and other technologies. The desulfurization industry focuses on studying low-temperature selective catalytic reduction flue gas denitrification catalysts, SCR catalyst regeneration technology, industrial boilers and kilns low-nitrogen combustion technology, etc. used in steel, nonferrous metals, cement and other industries.
4.5 Strengthen the production capacity of midstream air pollution detection equipment
Focus on strengthening the production of online monitoring and testing equipment such as low concentration and high humidity flue gas fine, ultrafine particulate matter, NOx, SO2, SO3, sulfuric acid mist, Hg, NH3, etc., as well as the production capacity of key pollutants such as fixed pollution sources VOCs and foul-odor gas emissions online monitoring, detection technology equipment, VOCs gas chromatography-mass spectrometry rapid monitoring, detection technology equipment. At the same time, we must accelerate online monitoring and detection technology equipment such as ultra-fine particulate matter and VOCs, as well as rapid identification technology equipment for mobile pollution sources with excessive emissions.
In addition, it includes high-sensitive online monitoring and detection equipment for low-concentration volatile, semi-volatile and particulate organic matter; online monitoring and detection technology equipment for identification of atmospheric particulate matter sources; multi-platform sky-ground integrated real-time monitoring technology technology including multi-parameter foundation of air pollution, high-resolution online integrated measurement technology equipment for vehicle (ship) and airborne navigation observation technology equipment, detection technology equipment for the exchange of material energy of free troposphere and boundary layer, satellite telemetry technology equipment, etc., are all equipment that need to focus on accelerating research and development and production in the future.
5 Conclusion and discussion
Atmospheric environmental protection industry sub-sector industries include dust removal, desulfurization, denitrification, VOCs, automotive exhaust gas treatment, etc. By analyzing that the industrial chain of the dust removal, desulfurization, and denitrification industries is relatively complete, and the industrial chain of the VOCs and automotive exhaust gas treatment industries still has problems such as mismatch between various links and lack of rich main product categories, and the potential for building a full industrial chain is great. Based on detailed analysis of industrial chains in various fields, key links and nodes for the value appreciation of industrial chains in various industries are proposed, and the key directions for building the entire industrial chain are pointed out. The research is mainly based on qualitative analysis. In the future, the performance of the industrial chain will be evaluated based on qualitative analysis, identify key links to improve performance, and put forward more targeted countermeasures and suggestions for building the entire industrial chain on the basis of evaluation. This is a direction worthy of in-depth analysis and discussion.
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