Particle pollution problem is becoming increasingly serious, bag type dust removal technology is widely used, the use of dust bags and demand is increasing. It is understood that at present, in the field of industrial dust removal, the main battlefield of treatment is basically circled in thermal power, metallurgy, cement, etc., and the mainstream treatment technology is electrostatic dust removal and bag type dust removal. Compare these dust removal technologies, bag type dust removal because of the wide range of particle size with stable and efficient dust removal function, and PM2.5 also has a high dust removal efficiency, is the most widely used, the fastest development of dust removal technology. As the core component of bag filter, the variety, quality and technical level of bag filter are the important conditions for successful application and rapid development of bag filter. The development and progress of the bag filter is ultimately the development and progress of the dust bag. Many domestic scholars are devoted to the research of dust removal efficiency of dust bag, but ignore the recycling of dust bag after use. Each year, the amount of bag filter media use, corresponding to how many used dust bags will be replaced down waiting for processing, the recycling of used dust bags can not wait. 1. Radiation cracking method Radiation cracking recycling method is applicable to pure PTFE products, because the additives in PTFE are generally glass fiber, molybdenum disulfide, copper powder, etc.. The glass fiber will be discolored by high-energy radiation. The added copper powder particle size is generally 40μm role, high-energy radiation can not further refine the particles to 10 ~ 20μm, so the radiation cracking method is suitable for pure PTFE processing of secondary products, residual materials and processing of off-cuts such as car chips. Under the action of accelerated electron rays or high-energy γ-rays, the radiation dose is not less than 100KGy environment, which destroys the carbon and fluorine bonds and causes the breakage of PTFE molecular chain to obtain PTFE products with small molecular weight. Because of the reduction of molecular weight, PTFE becomes brittle, and by the method of airflow crushing or grinding, we can get PTFE ultra-fine powder with particle size of 1~20μm. The radiation cracking process requires less PTFE material and acts on the PTFE product by high energy rays under certain atmospheric conditions. In the encapsulation step of the process, different products are obtained depending on the atmosphere used. Degradation under inert gas conditions yields perfluorinated alkanes and perfluorinated olefins. Degradation in an air environment yields a purer PTFE or its modified products. Degradation under oxygen conditions yields perfluorinated acid derivatives. In industrial production, degradation under air conditions is generally used, considering cost and usage applications. The molecular weight of PTFE is altered by...

Dioxins are produced by the incineration of domestic and hazardous waste, and the national standard stipulates that the emission concentration of dioxin-like pollutants in the flue gas of domestic waste incineration should not be higher than 0.1 ng TEQ/Nm3. dioxin-like substances are available in gaseous and solid forms. At present, waste incineration power plants mainly use activated carbon injection to absorb dioxin-like substances in flue gas. However, due to the stringent emission standards, flue gas emissions from many waste-to-energy incineration plants frequently exceed the standards. In response to the accidental and uncontrollable occurrence of dioxin emission exceedance in waste incineration power plants, Yuanchen Technology has developed an integrated filter media for oxidation, dust removal and dioxin removal based on the integrated filter media technology of Xiaofulv and dust removal and denitrification. The integrated filter media directly blocks solid dioxins on the external surface for physical removal, while gaseous dioxins are catalytically decomposed into harmless small molecules by the de-dioxin catalyst embedded inside the filter media. The activity of the integrated filter media can reach more than 80% at 200~240℃, which can effectively solve the problem of excessive dioxin emissions. Like the Xiaofluorocarbon green de-nitrification integrated filter bag, the oxannihilation de-dioxin integrated filter media can be designed into single-layer, double-layer, single-layer laminated, double-layer laminated and other structures. Yuanchen Technology will always be based on customer pain points, focus on flue gas treatment, and contribute to the blue sky and blue water, energy saving and emission reduction, ecological harmony, Yuanchen wisdom!

When the bag blockage occurs, the resistance increases, which can be shown by the increase in the reading of the differential pressure meter. Bag clogging is the main cause of bag wear, perforation, shedding and other phenomena. Causes of dust bag blockage, according to the table for inspection and maintenance. I Generally take the following measures 1.  Temporarily strengthen the dust cleaning to eliminate the clogging of the bag. 2. Partial or complete replacement of bags. 3. Adjust the installation and operating conditions. II Measures to prevent clogging of dust bag Bag wetting Leakage of dust collector box and other parts Eliminate water leakage, drying, repeated dust cleaning. Dust wet Identify the cause Eliminate the root cause, repair. Insufficient bag tension Suspension method Adjustment, repair. Clogging of the lower part of the bag Identify the cause Adjustment, repair. Bad installation of cloth bag Installation method Adjustment, repair. III Poor ash cleaning 1. The ash hopper is not sealed. 2. Ash cleaning mechanism failure. 3. Insufficient backblowing air volume. 4. Insufficient blowing pressure adjustment, repair. IV Bag shrinkage to identify the cause 1. The filter speed is too high, air volume, adjust. 2. The dust filter bag breakage. The shape of the bag and the bag installation methods and institutions to determine the location of the bag is prone to breakage, according to which inspection and repair can be carried out. But mainly caused by the following reasons bag breakage, such as the occurrence of breakage phenomenon can refer to the following table for inspection. (1) ash cleaning cycle is too long adjustment, shortening filter bag aging to identify and eliminate the cause (2) dust cleaning time is too long adjustment, shorten the filter bag due to heat hardening to identify and eliminate the cause (3) Insufficient bag tension adjustment, strengthening burned Re-research the filter bag material (4) the bag is too loose adjustment, leakage of dust to identify and eliminate the cause (5) bad installation of bags adjustment, reinforcement too high filter speed adjustment to reduce V Dust bag aging Mainly due to the following reasons, the cause must be investigated, take measures to eliminate and replace the dust filter bag. 1. Due to abnormal high temperature and hardening shrinkage. 2. Due to the contact reaction with acid, alkali or organic solvent vapor. 3. Reaction with moisture. VI The filter cloth should not be hung too loose or too tight, too loose easy to accumulate dust, too tight easy to pull bad. VII The new process should not be mixed with the old bags to avoid damage to different times affect the normal work of dust removal equipment. VIII Replace the down cloth bag, first blow clean with compressed air, and then check whether there are holes, there are holes repaired and left for replacement. Such as dust paste bags, rinse with water, cool and dry, and then set aside for replacement. Anhui Yuanchen Environm...

Technology Introduction Yuanchen Technology D&D filter media integrates dust removal and denitrification catalytic functions, and loads denitrification catalysts in the form of finished products or precursors onto the dust removal filter media for synergistic treatment of dust removal and denitrification. Technological advancement Synergistic realization of dust removal and denitrification, for multi-purpose use. Denitrification catalyst in the form of powder attached to the surface and inside of PTFE or other fiber filter media, forming a filter/catalytic layer. A variety of filter media structure forms to improve dust particle filtration accuracy and maximize the catalytic effect of denitrification filter media. Wide range of activity temperature (160~240℃), highest denitrification activity up to 96% (200℃).

Conventional dust removal and denitrification integration Bag filter + SCR/SNCR denitrification The dust removal and denitrification systems are arranged in one flue gas path, and the dust removal and denitrification are still carried out separately. Bag filter SCR denitrification New integrated dust and denitrification The SCR denitrification catalyst is loaded onto the dust filter media in some way to achieve "one bag, two uses", and the SCR denitrification catalytic reaction is carried out at the same time as the dust removal. The integrated design of dust removal and denitrification can simultaneously remove dust particles and nitrogen oxides (NOx) from industrial flue gas, which can meet the needs of domestic waste incineration, cement, steel and other industries. By loading catalyst precursors or active components on the surface and inside the filter bag, and using the existing bag filter as denitrification reactor, the new integrated dust removal and denitrification technology does not need to add new denitrification equipment, which can save the space and capital investment occupied by SCR equipment and reduce the cost of flue gas treatment for enterprises.

The wide temperature difference denitrification catalyst is widely used in power plants, where the flue gas temperature is lower than 300℃ when the boiler is running at low load. The catalyst pores and the subsequent catalyst ash accumulation, wear and tear, air preheater clogging and a series of other problems. Based on the vanadium and titanium catalysts, the catalysts are doped with rare earth elements to increase the activity at low temperatures and to widen the denitrification temperature window to 250~420°C to achieve the denitrification requirements and to reduce the generation of ammonium hydrogen sulfate to achieve the purpose of denitrification under low load conditions in power plants. Main features and performance parameters of wide temperature difference denitrification catalyst: 1. Mainly, the performance reflects: strong sulfur resistance, effectively reducing the formation of ABS. Easy operation and maintenance. Low activity decay, with long life. 2. Mainly product characteristics: denitrification efficiency: possesses about 98% removal rate in the temperature range of 250~420℃. Specific surface area: 70±5(m2/g) . Compressive strength: axial compressive strength ≥ 2.5MPa, radial compressive strength ≥ 0.8MPa. wider activity window, to meet the 200 ~ 420 ℃ operation.