At present, the commonly used flue gas desulfurization methods at home and abroad can be divided into three types of desulfurization processes: wet, semi-dry, and dry according to whether water is added during the desulfurization process and the dry and wet form of the desulfurization product. 1. Wet desulfurization Advantages: gas-liquid reaction, fast reaction speed, high desulfurization efficiency, generally higher than 90%, mature technology and wide application. The technology is relatively mature, and the production and operation are safe and reliable, accounting for more than 80% of the total installed capacity of desulfurization. Disadvantages: The product is liquid or sludge, which is difficult to handle, the equipment is severely corrosive, the flue gas needs to be reheated after washing, the energy consumption is high, the area is large, and the investment and operating costs are high. The system is complex, the equipment is huge, the water consumption is large, and the one-time investment is high. It is generally suitable for large-scale power plants. Technical route: limestone/lime-gypsum method, indirect limestone-gypsum method, lemon absorption method, etc. 2. Dry desulfurization Advantages: gas-solid reaction, compared with wet desulfurization system, the equipment is simple, the area is small, the investment and operating costs are lower, the operation is convenient, the energy consumption is low, the product is easy to handle, and there is no sewage treatment system. Disadvantages: slow reaction speed, low desulfurization rate, advanced up to 60-80%. The desulfurization efficiency is low, the absorbent utilization rate is low, the abrasion and fouling phenomenon are more serious, the equipment maintenance is more difficult, the stability and reliability of the equipment operation are not high, and the service life is short. Technical route: activated carbon adsorption method, electron beam radiation method, charged dry absorbent injection method, metal oxide desulfurization method, etc. 3. Semi-dry desulfurization Semi-dry desulfurization includes spray drying desulfurization, semi-dry and semi-wet desulfurization, powder-particle spouted bed desulfurization, flue jet desulfurization, etc.. 1. Spray drying method Disperse the absorbent into very small mist droplets by the force of machinery or air flow. The mist droplets and the flue gas form a relatively large contact surface area. A kind of heat exchange, mass transfer and integration between the gas and liquid phases occurs. Desulfurization method of chemical reaction. Commonly used absorbents are lye, lime milk, limestone slurry, etc. At present, most devices use lime milk as absorbent. Under normal circumstances, the desulfurization rate of this method is 65%-85%. Advantages: Desulfurization is carried out in the three-phase state of gas, liquid, and solid. The process equipment is simple. The product is dry CaSO3 and CaSO4, which is easy to handle, has no serious equipment...

Anhui Yuanchen Environmental Protection Technology Co., Ltd. (hereinafter referred to as "Yuanchen Technology") is mainly engaged in the research and development, production, sales and service of flue gas purification, energy-saving and environmental protection filter materials, and provides corresponding online monitoring, environmental testing, and hazardous waste recycling services . Yuanchen Technology serves the national sustainable development strategy of the ecological environment, and has long been committed to the research and development and production of new materials in the field of pollution reduction and carbon reduction and the integration of upstream and downstream industrial chains, relying on strong scientific research capabilities and deepening of the industrialization of core technologies. , Embarked on the fast lane of accelerated development. From 2017 to 2020, the company's operating income was 267 million yuan, 324 million yuan, 363 million yuan, and 458 million yuan; the net profits attributable to the parent were 36 million yuan, 38 million yuan, 59 million yuan, and 63 million yuan, respectively. Recently, Yuanchen Technology made its initial public offering of new shares and listed on the Science and Technology Innovation Board of the Shanghai Stock Exchange. The raised funds are planned to be used in the "Industrialization Project of High-performance Dust Removal Filter Material with an Annual Output of 4.6 million Square Meters". Another historic moment in China.

In order to further promote the spirit of model workers and craftsmen, give full play to the role of model workers and mobilize the labor enthusiasm and innovation vitality of the majority of employees. On the afternoon of February 19th, Zhang Zhuqing, vice chairman of the Federation of Trade Unions of Xinzhan High-tech Zone, led a team to Anhui Yuanchen Environmental Protection Technology Co., Ltd. to award the "Zhou Guanchen Blue Collar Innovation Studio" which was standardized at the municipal level. Zhang Zhuqing conducted a field visit to Zhou Guanchen’s blue-collar innovation studio, listened to the introduction of the innovation studio’s operation, learned in detail about the innovation studio’s organizational structure, rules and regulations, work objectives, innovation results, etc., and the innovation results achieved by the innovation studio The patent project is fully affirmed. It is hoped that the blue-collar innovation studio will give full play to the role of “passing and leading”, centering on technological innovation, product innovation and management innovation, and earnestly exerting its own professional expertise and technical advantages, and driving a group of innovative and technical talents to help the enterprise speed up Contribute to development. Zhou Guanchen’s Blue Collar Innovation Studio was founded in May 2020 and is composed of 13 members from Yuanchen Science and Technology Innovation Research Institute and Project R&D Center. It mainly carries out technological innovation activities around themes such as cost reduction, energy saving and emission reduction, technological transformation, and safe production. In the past two years, it has successively obtained 4 international PCT patent applications, 33 authorized invention patents, 31 authorized utility models, the second prize of Anhui Science and Technology Award for Key Technology Research and Industrialization of Industrial Exhaust Gas Denitration, and the "115" Industrial Innovation Team of Anhui Province , Anhui Province Science and Technology Major Projects and many other honors. In the next step, the Federation of Trade Unions of Xinzhan High-tech Zone will continue to increase the establishment of municipal-level standardized model workers and blue-collar innovation studios, provide good services in policy guidance, hardware construction, and financial support, and actively serve the region’s strategic emerging industries. Leading companies build platforms for innovation and communication, vigorously carry out various innovation and profit-making activities such as technological innovation, management innovation, and service innovation, give full play to the role of model workers in the new era, promote the cultivation and training of outstanding innovative teams, and build model workers and blue-collar innovation studios It is a base for employee innovation, skills training, and a base for promoting the spirit of model workers.

In September 2020, at the 75th session of the UN General Assembly, President Xi proposed for the first time the goal of "striving to reach the peak of carbon dioxide emissions by 2030 and striving to achieve carbon neutrality by 2060", to achieve a green and low-carbon goal for our country. The development indicates the direction, and the environmental protection industry has thus ushered in huge development opportunities. On March 13, 2021, the "Outline of the Fourteenth Five-Year Plan for the National Economic and Social Development of the People's Republic of China and the Long-term Goals for 2035" (referred to as the "Fourteenth Five-Year Plan" outline) was officially announced, proposing that Change the national independent contribution target and formulate an action plan for peaking carbon emissions by 2030." The agency said that under the guidance of a series of policies to reduce carbon emissions, energy conservation, environmental protection, clean energy and other fields will usher in new development opportunities. On March 12, the performance of carbon neutral stocks continued to be strong, and a number of power stocks such as Wenshan Power and Huayin Power all reached their daily limits. According to statistics from Flush, as of March 12, the Flush Carbon Neutral Index has risen 9.89% since March. Among 61 constituent stocks, a total of 56 have recorded positive gains in the month, accounting for 91%. To achieve carbon neutrality, one of the most urgent measures at present is to vigorously control air pollution. Yuanchen Technology is the one who has been deeply involved in this field for many years. Yuanchen Technology’s main business products are various types of high-efficiency and low-resistance dust removal filter bags and medium and low temperature SCR denitration catalysts. While saving energy and increasing efficiency, they are specially used to treat smoke and nitrogen oxides in industrial flue gas, which belong to air pollution control. An indispensable and important component has an important strategic position in the national air pollution prevention and control process. Its market demand, technical level and the development and growth of the entire industry are also closely related to the continuous deepening of national environmental protection requirements. Tighter pollution emission control is a key factor that promotes the rapid development of the bag dust removal and flue gas denitrification industries. The bag dust removal and denitrification industries are policy-driven industries. In recent years, many industrial policies have been issued for flue gas dust removal and denitrification products. To encourage and give priority to the development of manufacturing and application. The report of the 19th National Congress of the Communist Party of China pointed out that we should adhere to the common governance of the whole people, source prevention and control, continue to implement air pollution prevention and control...

In coal-fired power plant flue gas denitrification, the Selective Catalytic Reduction (SCR) catalyst serves as the core engine. The stability of DeNOx efficiency, compliance with emission standards, operational costs, and overall system lifespan all depend heavily on catalyst performance. For plant operators, engineers, and procurement managers, issues like catalyst plugging, poisoning, mechanical wear, and premature deactivation are common headaches. This guide breaks down the essential technical aspects of SCR catalysts: chemical composition, selection standards, structural comparisons, deactivation mechanisms, and end-of-life management. 1. Chemical Composition of SCR Catalysts Commercial SCR catalysts for power plants are multi-component composite systems. The precise formulation determines the catalyst's operating temperature window, DeNOx activity, and resistance to chemical poisoning. Typical industrial formulations include: Titanium Dioxide (TiO₂): The primary carrier/substrate (typically in the anatase form). It provides the structural surface area to disperse active phases, suppresses SO₂ oxidation, and ensures stability under harsh, corrosive flue gas conditions. Vanadium Pentoxide (V₂O₅): The primary active phase. It drives the redox reaction that reduces NOx into N₂ and H₂O. Its concentration is tailored based on the specific flue gas temperature and concentration profile. Tungsten Trioxide (WO₃): A promoter that enhances thermal stability, prevents structural sintering at high temperatures, and strengthens the electronic interaction between the active phase and the carrier. Molybdenum Trioxide (MoO₃): An optional promoter used specifically to enhance arsenic resistance. It is critical for plants burning high-arsenic coal. Structural Additives (SiO₂, Al₂O₃): Added to improve mechanical strength, fracture toughness, and erosion resistance in high-dust environments. 2. 5 Engineering Metrics for Quality Evaluation To withstand the harsh environments of power plant flue gas (high dust, high temperature, and complex chemical trace elements), a high-grade SCR catalyst must satisfy five distinct technical requirements: High DeNOx Activity: Sustained, high-efficiency NOx removal rates across varying boiler loads, ensuring strict compliance with local emission limits. Optimal Reaction Selectivity: Ensures the reducing agent (NH₃) reacts precisely with NOx rather than being oxidized by oxygen. This maximizes chemical efficiency and minimizes downstream ammonia slip. Superior Mechanical Integrity: High crushing strength and erosion resistance to withstand continuous bombardment by high-velocity fly ash particles, preventing structural cracking during installation and operation. Robust Poisoning Resistance: The ability to resist chemical attack from trace elements within the fly ash, such as arsenic, alkali metals, and alkaline earth metals. Balanced Chemical Stability: Minimal SO₂ to SO₃ oxidation rates (typically below 1%), excellent thermal s...

For asphalt plant managers, the exhaust stack is more than just a piece of hardware—it is a continuous compliance gauge. The intense thermal load, sticky hydrocarbon vapors, and heavy aggregate dust generated during hot mix production create one of the most punishing environments for industrial air filtration. One misstep in your dust collection strategy doesn't just mean an environmental citation; it directly threatens your daily production capacity. Achieving consistent emissions below 10 mg/Nm³ while keeping operating costs under control requires moving beyond standard maintenance. It demands a granular understanding of how your filtration media interacts with structural gas flow. This comprehensive guide breaks down the core engineering principles needed to maximize the efficiency of your asphalt baghouse and slash your Total Cost of Ownership (TCO). The Engineering Reality of Hot Mix Asphalt Emissions Dust emissions in an asphalt mixing station are highly dynamic. The process begins in the rotary drying drum, where cold aggregates are heated and cascaded, creating a massive upstream dust load. Subsequent stages—including the hot elevator, screen decks, and aggregate weigh hoppers—generate fine, abrasive particulates that must be continuously evacuated under negative pressure. With global standards like the US EPA NESHAP, European BREF directives, and localized green manufacturing mandates tightening yearly, relying on outdated filtration designs is a liability. Modern baghouse systems are no longer treated as simple add-ons; they are high-precision reactors that determine whether a plant is legally permitted to operate. Pre-Separation Technology: Why Mechanical Collectors Are Essential Deploying a bag filter as a single-stage solution against raw drum exhaust is a recipe for premature fabric failure. Coarse aggregate particles traveling at high velocity act like sandblasters, cutting through fabric fibers within weeks. To prevent this, a highly optimized two-stage interception setup is mandatory: Stage 1: The Heavy-Duty Cyclone (Pre-separator) – Utilizing centrifugal forces, the pre-separator drops out 85% to 90% of the heavy, coarse particulate mass before it ever reaches the filter house. This reclaimed grit is immediately recycled back into the mix as valuable filler. Stage 2: The Pulse-Jet Baghouse – Receiving only the micro-fine fraction, the secondary fabric filter operates under a dramatically reduced dust cake load, resulting in uniform pressure drops and significantly prolonged bag life. Precision Grid Alignment of High-Temperature Bag Filters for Industrial Smelting and Asphalt Plants Selecting the Ideal Media: Aramid Fiber vs. Extreme Conditions The operational survival of your baghouse relies entirely on the chemical and thermal limits of your filter media. Flue gases leaving an asphalt drum consistently hover between 140°C and 180°C, frequently spiking during burner adjustments. Standard polymers like polyester fail instantly un...