The working principle and steps of the circular dust bag filter are as follows: the dust-containing gas enters the filter chamber through the open flange set on the ash hopper, the coarser dust particles fall into the ash bin, and the gas containing fine dust is filtered through the filter bag. Dust is retained on the surface by the filter bag. Then the clean gas filtered by the cloth bag flows into the clean air chamber through the mouth of the bag, and then is discharged into the atmosphere through the fan. When the dust on the surface of the filter bag accumulates more and more, the programmer, that is, the pulse controller, starts to work. The pulse valves are opened one by one, and the compressed air used for cleaning dust is sprayed to clean the filter bag through the nozzle set on the blowing pipe, so that the filter bag suddenly expands. Under the action of the reverse airflow, the dust attached to the surface of the filter bag quickly leaves the filter bag and falls into the ash bin, and the dust is discharged by the ash unloading valve. The round dust collector bag is a kind of dust collector bag, which plays a key role in the bag dust collector. The filter bag should be made of high temperature resistant materials, such as fiberglass cloth/felt, NOMEX, needle felt, P84 needle felt, etc. Taking into account the durable high temperature of the filter bag and the cost and other factors, the copper industry generally chooses NOMEX needle felt. The circular dust-removing cloth bag adopts glass fiber filter material cloth bag because of its good heat resistance, high tensile strength, good dust removal and other advantages, it has been widely used in smoke and dust control. However, in the filtration of acidic flue gas produced by coal-fired boilers and garbage incinerators, the strength is greatly reduced due to acid corrosion, which affects the service life of the filter material and limits the application of glass fiber filter material in this field. The dust collector bag frame adopts a circular structure, and the longitudinal ribs and anti-support ring of the dust collector bag frame are evenly distributed. And have enough strength to prevent damage and deformation (longitudinal rib diameter ≥ φ4, 12 bars, reinforced anti-support ring φ5, spacing 200, φ130×6000). The "η" type cold-stamping short pipe is installed on the top to ensure the verticality of the bag cage and to protect the stability of the filter bag mouth during spraying. The bag skeleton bone material of the dust collector is made of 20# carbon steel, which is formed at one time by the cage bone production line to ensure the straightness and torsion of the cage bone. The filter bag frame is smooth and free of burrs after being touch-welded, and has sufficient strength to prevent welding, false welding and missing welding. The bag frame of the dust collector adopts organic silicon spraying technology, the coating is firm and corrosion-resistant, which avoids the rust of the ...

The coated filter material used in the bag dust removal industry not only achieves near zero emissions, but also because the film is non-sticky and has a small friction coefficient, the powder cake will automatically fall off, ensuring long-term stability of the equipment resistance, so the bag filter is fully utilized Superiority is an ideal filter material choice.   A new type of filter material formed by compounding a layer of polytetrafluoroethylene (PTFE) film on the surface of the ordinary filter material is the PTFE coated filter material. The PTFE membrane acts as a "primary dust layer". The material exchange is carried out on the surface of the membrane and can be effectively filtered at the beginning of use. The unique three-dimensional network structure of the film prevents dust from passing through, and there is no risk of pore clogging. This filtering method is called "surface filtering". At present, PTFE coating processes on the market mainly include: adhesive method and high temperature hot pressing process.   Adhesive method: This method is mainly to bond the film and the base cloth together through the adhesion of an adhesive. The process is easy to operate, and the cost of the laminating machine is low, and it is currently a widely used laminating process. Difficulty: Polytetrafluoroethylene (PTFE) has excellent high temperature resistance, weather resistance, chemical corrosion resistance, low surface tension and other characteristics, but because PTFE contains extremely strong CF bonds and fully symmetrical CC bonds strengthened by atoms Linear macromolecules cause the surface tension of PTFE and its films to be very low, the surface is not easy to wet, and it is difficult to be compatible with other substances.  Method: The current development and research of adhesives that can directly bond low surface energy fluorine-containing materials mainly include solvent-based adhesives using organic amine complexes as initiators, hot-melt adhesives containing thermoplastic fluoropolymers, and water-based adhesives. Adhesive. Through different gluing processes, a layer of adhesive is applied to the base fabric to bond the PTFE film and the base fabric together.  Disadvantages: During the laminating process, there will be problems such as whether the base cloth is uniformly glued and the adhesive is easy to carbonize at high temperatures. Because the adhesive will block the microporous structure of the PTFE film, it will cause the air permeability of the membrane filter to decrease, and under high temperature use conditions, the adhesive will melt or even carbonize, which will further cause the membrane micropores to block and cause the filter material to fall off. Membrane affects the service life of the film-coated filter material.  High-temperature hot-pressing process: The high-temperature hot-pressing laminating process is to first subject the base cloth or PTFE film to a special surface treatment, and the...

Flumes dust bag is added with P84 fiber on the basis of glass fiber needled felt to make the felt layer more compact, and the entanglement between the fibers is strengthened, which can cope with higher filtering wind speed. The P84 fiber has a trilobal cross section, which increases the chance of dust catching. Moreover, the special cross-sectional shape of the fiber makes most of the dust concentrated on the surface of the filter material, which is more difficult to penetrate into the filter material and block the gaps, reducing the running resistance and thus improving Filter wind speed. The mouth of the flumesi dust removal cloth bag and the bag body are connected with a single single needle thread and two double needle threads; the bag body is sewn by a filter material crimping device with three needles and six threads, the needle pitch is 28-35 needles/10cm, and its width It is 6-9mm; the bottom material of the bag body should be turned outwards and upwards with a reinforcement layer of 100mm bottom; the side material of the reinforcement layer should be turned inward and sewn with double needles, and the three-needle stitching on the seam surface of the bag body should be vertical to the bag Mouth, without bending. The body and bottom of the flumesi dust bag are sewn with double or three needle stitches; the bottom of the bag body and the bottom of the bag have a distance of 10-12mm; the bottom of the bag body can be upright, and the bottom of the bag has a reinforcing layer and a double bottom. 1. The pore size of the bag membrane of the film-coated Fluormes needle-punched felt dust collector is between 0.23um, and the filtration efficiency can reach more than 99.99%, and almost zero emission is achieved. After cleaning, the porosity is not changed, and the dust removal efficiency is always high. 2. When the coated dust bag is used, the pressure loss is higher than that of the ordinary dust bag, but after it is put into operation, the pressure loss changes little with the increase of the use time. The pressure loss of the ordinary dust bag will increase with the extension of the use time. getting bigger. 3. The dust can easily enter into the ordinary dust bag in use, and it accumulates more and more, until the pores are blocked, causing it to be unusable. With the use of PTFE coated dust bag, the filtered dust can be easily removed from the surface of the film, the cleaning effect is good, the cycle is long, and the cleaning pressure intensity in use is low, which improves the service life of the dust bag and can Significantly reduce the maintenance workload of the dust collector and reduce the operating cost of the product. It is laminated with woven dust bag and needle-punched filter felt to make PTFE coated dust bag, which is widely used in flue gas purification and dust removal. Governance and special recycling and other fields. 4. The coated dust bag also has good chemical stability, heat resistance and chemical corrosion resistance.

The main technological process of the needle punched non-woven filter material for the bag filter is: opening-mixing-fine opening-carding-netting-needle punching-finishing-slitting bag making. The needle-punching non-woven process uses barbed thorns on the edges to repeatedly puncture the web. When the barb passes through the web, it pierces the surface of the web and part of the inner web into the interior of the web. Due to the friction and cohesion between the webs, the original fluffy web is compressed. When the felting needle exits the fiber web, the pierced fiber bundles break away from the barbs and stay in the fiber web. After multiple needle punches, the fibers in the fibers are entangled with each other, thereby forming a non-woven material with a certain strength and thickness. The most important thing in the acupuncture process is to reasonably distribute the acupuncture density and control the acupuncture depth. On the basis of the traditional fuel tank structure, the elliptical trajectory needle punching machine is equipped with a novel multi-link mechanism auxiliary transmission, which combines the vertical movement of the puncture needle and the horizontal movement of the puncture needle into an elliptical movement trajectory, which can follow the traveling direction of the needle felt Joint movement, while maintaining a stable up and down movement, while achieving mechanical reinforcement, does not damage the mesh structure, and maximizes the uniform mechanical strength of the cloth surface.

The main technological process of the needle punched non-woven filter material for the bag filter is: opening-mixing-fine opening-carding-netting-needle punching-finishing-slitting bag making. Needling is another important process after the dust removal filter material is processed and carded. Needling is to consolidate the fiber web layer and the base cloth layer together with a needle to form a needle punched non-woven felt material. Pre-needling machines are available in the form of single-needle board, double-needle board, etc., which are used to form a web that has been carded and laid into a certain technological requirement through pre-needling to initially entangle and shape the web, so as to minimize the drafting of the formed web , To ensure that the fiber web direction of the fibril web remains unchanged. The main acupuncture machine has the form of single needle plate, double needle plate and double needle zone. It is divided into upper and lower same position needle punching, upper and lower different position needle punching, etc., which is to further needle the fiber web that has been initially entangled by the pre-needling machine. Needle entanglement, so as to achieve the entanglement effect and needle punch density required by the process. Shaving needle punching machine has single shaft oil tank type double needle plate double needle zone eccentric needle punching type, double shaft oil tank type four needle plate double needle area same needle punching type and other forms. The surface of the woven fabric is smooth, without obvious needle marks, streaks and other defects. Yuanchen Technology always pays attention to product quality and quality first, and invests in the introduction of advanced Autefa acupuncture production line from Germany for the production of acupuncture filter materials. The production line is equipped with 3 needling machines and 1 automatic needle changing machine to escort the final product.

On the 21st, President Xi Jinping attended the general debate of the 76th UN General Assembly in Beijing by video and delivered an important speech entitled "Strengthen Confidence, Overcome Hardships, and Build a Better World". June 9th, 2021-Fully grasp the dual control of energy consumption and resolutely curb the blind development of the "two highs" project. The Environmental Resources Department of the National Development and Reform Commission hosted a symposium on carbon neutralization in some regions in Hangzhou, Zhejiang Province. The meeting thoroughly studied and implemented the spirit of General Secretary Xi Jinping’s important speech and instructions on carbon peak carbon neutralization work, and earnestly conveyed and implemented the deployment requirements of the first plenary meeting of the carbon peak carbon neutral work leading group and the first meeting of the leading group office. Report the progress of carbon peaking and carbon neutrality at the national level, and put forward clear requirements for accelerating relevant work in various regions. June 16, 2021-Carbon neutrality work symposium on carbon peaks in some regions. The Department of Environmental Resources and Resources of the National Development and Reform Commission continued to host a symposium on carbon neutralization in some areas in Beijing. It is necessary to strictly implement energy conservation review and environmental review and approval, and for "two highs" projects that do not meet the requirements of national industrial planning, industrial policies, "three lines and one order", capacity replacement, energy efficiency standards, coal consumption reduction substitution, and pollutant emission area reduction. , We must firmly take it down.  July 16, 2021-The national carbon emissions trading market was launched for online trading. On February 1, the "Administrative Measures for Carbon Emissions Trading (Trial)" ("Administrative Measures") came into effect. The launching ceremony was held in the three places in Wuhan at the same time, and then the national carbon market, which has received much attention, officially began online trading. July 30, 2021-Corrective campaign-style "carbon reduction". The Political Bureau of the CPC Central Committee held a meeting to analyze and study the current economic situation and economic work. The meeting called for a coordinated and orderly implementation of carbon peaking and carbon neutrality work, and an action plan for carbon peaking by 2030 as soon as possible. Adhere to a national game of chess, correct the campaign-style "carbon reduction", and resolutely curb the "two highs". The project develops blindly. Do a good job in ensuring the power peak summer. On August 17, 2021, the National Development and Reform Commission clarified the “1+N” dual-carbon policy system. On August 17, Meng Wei, the spokesperson of the National Development and Reform Commission, stated at a regular press conference in August tha...