On June 3, 2020, the Ministry of Ecology and Environment issued the "Opinions on Actively Servicing and Implementing the "Six Guarantees" Tasks under the Prerequisite of Normalization of Epidemic Prevention and Control, and Resolutely Winning the Battle of Pollution Prevention and Control" (Huanting [2020] No. 27). In the "Opinions", certain prerequisites have been added to the ultra-low emission transformation of the cement industry: areas with larger production capacity; measures to local conditions; research and development, and the combat mission of winning the battle against pollution prevention has officially joined the cement industry. emission. In fact, major cement provinces in key regions such as Hebei, Henan, Anhui, Zhejiang, etc. have already taken the lead in the country in carrying out ultra-low emission transformation work in the cement industry. Low-emission retrofit projects, and achieved ultra-low emissions. The latest air pollutant emission standards for the cement industry in some provinces and cities (mg/m3) area particulates Sulfur dioxide Nitrogen oxides Complete time Zhejiang 10 35 100 End of 2022 10 35 50 End of June 2025 Hebei 10 30 50 Oct 11th,2021 Henan 10 35 100 End of 2022 10 20 50 Strive to achieve Anhui 10 50 100 Oct 1st,2020 Shanxi 20 20 260 Datong,Xinzhou,Shuo Zhou existing enterprise 10 30 200 Jinzhong City,Lvliang City,Linfen City,Yuancheng City,Taiyuan,Yangquan,Changzhi,Jincheng Hainan 10 100 200 Before Dec 31st,2021 Handan 10 50 50 / Tangshan 10 30 50 / Xingtai 10 50 50 / Guangan 10 50 100 / Jinhua 10 35 100 Within two years The major changes in the cement industry's ultra-low emissions have also spawned the emergence of new technologies for dust removal, desulfurization, and denitrification, providing technical support for the cement industry to more efficiently and stabilize the deep emission reduction of pollutants. Desulfurization and dust removal technology processes have been able to meet today's standard requirements, and nitrogen oxides (NOx) are the biggest problem facing ultra-low emission transformation. The characteristics of NOx emissions in the cement industry are high concentration, high dust content and high viscosity, which make it difficult to remove nitrogen oxides from cement clinker production lines. There are two types of denitration technologies commonly used in the industry: SNCR and SCR: SNCR technology: 1. Low-nitrogen technological transformation + SNCR precision denitrification technology: This technology has been successfully applied in a 7500t/d clinker production line of a cement company in Zhejiang, and can stably control NOx emissions within 100mg/Nm3. 2. SNCR+ ion generator denitration technology: Using this technology in a 5500t/d clinker production line of a cement plant in Henan, the final NOx emission concentration is ≤30 mg/Nm3, and the ammonia escape is less than 5ppm. 3. Staged combustion + SNCR + steam catalytic combustion technology: a typical representative is the 5...

The composition of the flue gas from domestic waste incineration is complex. In addition to O2, N2, CO2, H2O, etc., it also produces pollutants such as acid gas (NOx), CO, heavy metals, dust and residual organic matter (including dioxins and furans, etc.). The characteristics of the flue gas of waste incineration are: 1) The flue gas contains a large amount of moisture, which generally has a moisture content of 23% to 30%. The original water content in the garbage is large, and some hydrocarbons generate water vapor during the combustion process; 2) The composition of the flue gas is complicated. Contains O2, SOx, CO2, Nox, HCl, HF, water vapor, total hydrocarbons (THC), and produces carcinogens such as dioxins and furans; 3) The characteristics of flue gas dust are different from others. The salt content (chloride and sulfate) in the dust is high, the particle size of the flue gas dust is fine, and the flue gas dust has a high viscosity; 4) It contains trace heavy metals such as mercury, cadmium, lead, molybdenum, chromium, nickel, and copper. These conditions make the material requirements of the dust removal filter material for the flue gas of domestic waste incineration higher, and need to withstand high temperature and high humidity working conditions, and at the same time need to withstand the long-term erosion of complex flue gas. The special filter material for waste incineration flue gas treatment is mainly PTFE+PTFE membrane filter material, that is, PTFE fiber is used as the main raw material, and PTFE base cloth is placed in the middle layer to form a "fiber layer-base cloth-fiber layer" structure. After acupuncture processing and special functional treatments (calendering, water and oil repellent, chemical corrosion resistance, antistatic, heat setting, etc.), a filter material with certain physical and chemical properties is formed. Finally, the surface of the needled felt is covered by a high-temperature hot pressing process. Layer PTFE membrane. Product name Ptfe+ptfe filter fabric Ptfe+ptfe filter fabric with membrance fiber PTFE scrim PTFE Weight(g/m2) 750-850 Continuous temperature resistance(℃) 260 Peak temperature resistance(℃) 280 Break strength(warp) >800 Break strength(weft) >800 Elongation at break(warp)% <20 Elongation at break(weft)% <30 Air permeability(m3./m2/min) 8-12 2-5 Wind speed(m/min) <1.2 <1.0 scope High temperature resistance, oxidation resistance, excellent acid and alkali corrosion performance, high temperature, low filtration accuracy requirements High temperature resistance, oxidation resistance, excellent acid and alkali corrosion performance, and high filtration accuracy requirements Polytetrafluoroethylene (PTFE) is a highly crystalline polymer of tetrafluoroethylene (TFE) monomer. It is a white and waxy thermoplastic. The special molecular structure of PTFE makes the fiber have excellent chemical stability and corrosion resistance, which can improve the chemical erosion of the filter ...

In the process of filter bag work, the problem of filter bag damage often occurs, mainly including abrasion, burning, corrosion, etc., among which the filter bag burning is mainly related to dust and flue gas. This article will analyze the filter bag from the above two aspects. The cause of the burning problem and provide corresponding solutions to prevent the filter bag from burning in advance. 1. Dust ①High temperature There are high-temperature particles of different sizes in the filtered high-temperature flue gas, and their temperature is greater than 400℃, which cannot be detected by ordinary temperature detectors; most of the high-temperature particles will settle in the gravity sedimentation chamber, and some of them will pass through the flue gas at high speed with the airflow. The pipe enters the dust collector. For polyester, polypropylene, acrylic, polyphenylene sulfide and other fiber filter bags, when the surface of the filter bag is less dusty, the high-temperature particles will burn through the filter bag to form irregular round holes; when the surface of the filter bag is more dusty, the high-temperature particles will not Scalding through the filter bag will form dark-colored baking marks on the filter bag ②Combustibility and chargeability Certain combustible and easily loadable dusts, such as coal powder, coke powder, alumina powder and magnesium powder, meet sparks in the air (usually caused by friction sparks, static electricity, etc.) under certain concentration and oxygen content. Sparks, combustible particles, etc.) will burn or explode. The shock wave generated at the moment of the explosion deforms the porous plate, the filter bag bursts, and the instant high temperature and fire cause the filter bag to burn. The flammability of dust is related to many factors such as particle size, composition, concentration, combustion heat and combustion speed. The smaller the particle size, the larger the specific surface area, and the easier it is to ignite. ③Dust heat storage When dealing with high-temperature flue gas, a large amount of dust will accumulate in the ash hopper. If it is not cleaned up in time, the dust will accumulate heat in the ash hopper and increase the temperature. Excessive temperature will bake the filter bag and cause the filter bag to harden or burn, or even burn the bag. For cages and ash hoppers, the dust in the chamber should be cleaned up in time at this time. ④Dust smoldering When the dust on the surface of the flame-retardant fiber filter bag is oily and adhesive, it is easily ignited by high-temperature gas or particles. At this time, the flame-retardant fiber on the surface of the filter bag burns without open flames, and the oily dust sticks to the surface of the filter bag It burns slowly and without an open flame. Generally, the burning traces are diffuse or wavy edges, and there is no trace of high-temperature baking. 2. Smoke Improper control of high-temperature flue gas will cause large fluctu...

It is suitable for capturing fine, dry, non-fibrous dust. The dust filter bag is made of woven filter cloth or non-woven felt, and the dust-containing gas is filtered by the filtering effect of fiber fabric. In the field of industrial flue gas treatment, bag filter is widely used due to its high dust removal efficiency, no secondary pollution and easy recovery of dry materials.

From July 16th to 18th, the first International Conference on New Materials Industry was held in Bengbu, Anhui. The Governor of Anhui Province Wang Qingxian attended and delivered a speech. Academicians from all over the country, industry experts, and business executives at the forefront of the industry at home and abroad gathered together to seek the development of the new material industry and open a high-end exchange feast in the field of new materials. Yuanchen Technology participated in the exhibition and shared VOCs equipment products and related application cases on the spot. Science and technology catalyzes unlimited possibilities for new materials. In the Bengbu Convention and Exhibition Center, a new material exhibition area of 12,000 square meters gathers more than 2,000 exhibits from 336 first-class companies. Hosted by the People’s Government of Anhui Province and the International Glass Association, the conference focused on the development of the new material industry with the theme of “new materials, new kinetic energy and new life”, aiming to promote the “government, industry, research and research funding” in the new materials industry in a wider field and broader Range of exchanges and cooperation, highlighting new development results with material innovation, catalyzing new development momentum, and creating new development advantages. This exhibition is a platform for the conference and industry to connect. During the conference, Yuanchen Technology shared the development and application of VOCs catalyst equipment and products, concentrated on showing the most cutting-edge technological achievements in the development of the new material industry to all walks of life, and received great attention. People came to visit, consult, and negotiate. . Since the "13th Five-Year Plan", Anhui's new materials industry has shown a momentum of rapid development, and the scale of the industry has continued to expand. It has become an important new material industry development gathering place in the country. During the "14th Five-Year Plan" period, Anhui Province will build a coordinated policy system of "comprehensive policies + special policies" and "funds + funds", further expand and optimize the layout of the new material industry, and strive to form a trillion yuan by the end of the "14th Five-Year Plan" period. An industrial development pattern with a total scale of Yuan-level, a sub-industry at a level of 100 billion yuan, and a support of leading enterprises at the level of ten billion yuan. As a local company in Anhui, Yuanchen Technology is deeply aware of the responsibility and mission. It will definitely follow the country’s development requirements and set the policy direction. Work tenacity, continue to promote the development of the enterprise to a new level, and continue to make new and greater contributions to the world's environmental friendliness and human health!

General Secretary Xi Jinping pointed out at the ninth meeting of the Central Committee of Finance and Economics: We must incorporate carbon peaking and carbon neutrality into the overall layout of ecological civilization construction, and show the strength to grasp iron, so as to achieve carbon peaks by 2030 and 2060 as scheduled. The goal of former carbon neutrality. With a high sense of ownership, Yuanchen Technology is actively exploring for carbon reduction and emission reduction, and has developed a special filter material for waste incineration in accordance with the characteristics of industrial flue gas in the domestic waste incineration industry. Domestic waste treatment method There are various types of domestic garbage, and there are three main ways to deal with it. Sanitary landfill method: the advantages are the earliest application, the widest, simple process, and the lowest treatment cost; the disadvantage is that it covers a large area, the leachate and odor are difficult to solve, and the landfilled garbage cannot be fully recycled and utilized , So it is no longer the mainstream garbage disposal direction. Composting method: the advantage is that the organic matter in the domestic waste is digested by microorganisms to make it into stable humus; the disadvantage is that the composting conditions are more complicated and the cycle is longer, and it is not suitable for a large amount of waste treatment. Incineration method: The advantage is that the waste is rapidly oxidized and burned under high temperature conditions to realize waste reduction, resource utilization and harmlessness, which can effectively reduce the volume of waste by more than 90% and save land. The heat generated by waste incineration can be used for power generation ; The disadvantage is the generation of dust particles, nitrogen oxides, dioxins, etc.; the incineration method has gradually become the main method of domestic garbage disposal. The domestic waste incineration power generation industry involves many types of technologies, including incineration, flue gas purification, fly ash disposal, etc. Among them, incineration technology determines the effectiveness of waste treatment and the economics of operation, and is the key to achieving harmless and reduced treatment. Link. The load-bearing equipment for incineration technology is an incinerator. At present, domestic waste incinerators that are widely used and mature in technology at home and abroad are mainly grate furnaces. In 2010, there were 104 incineration plants in operation in my country, and the amount of municipal solid waste incineration treatment was about 23 million tons per year; by 2019, it increased to 401, with a treatment capacity of 120 million tons per year. In 10 years, the proportion of incineration treatment in municipal solid waste increased from 18.8% to 51.2%. As of June 1, 2020, there are a total of 455 waste incineration plants in operation in my country, and the compound an...