According to the relevant provisions of the State Electricity technical and environmental requirements, the desulfurization efficiency of coal under design conditions must be greater than 90%, the desulfurization of flue gas emission values ??of SO2 after less than net 400mg / Nm3. Must be greater than 99% removal rate, the net flue dust emission is less than 50 mg / Nm3. According to the actual situation, the use of furnace baghouse tower (hereinafter referred to as FGD), the collection efficiency of 99% of the design value, design desulfurization efficiency of 90%. Flue gas desulfurization dust emissions after net value of less than 50 mg / Nm3, SO2 emission value is less than 400 mg / Nm3. According to the actual situation, the use of flue gas desulfurization, flue gas contaminants in the treated boiler should meet the following criteria: dust emission concentration "50 mg / Nm3.d.m3 Ringer vine blackness" a concentration of sulfur dioxide "400 mg / Nm3. II. Conditions and design basis 20T boiler flue gas volume users: 50,000 m3 / H discharged flue gas temperature: 180 ℃ 220 ℃ or installation of one or two hot air heating tank, can reduce the temperature to 150 ℃ 180 ℃, reduced?? Damage sacks. Precipitator inlet dust concentration: 50g / Nm3 (dry) ~ 100g / Nm3 (dry); Year Running time: 8760 hours (our 12-month basis) to provide equipment (The following is a single parameter) See: ※ body resistance: dust bag: ≤1200Pa ※ body leakage rate: ≤2% ※ removal efficiency: ≥99.9% ※ precipitator outlet concentration: ≤50mg / Nm3 (dry base at 6% O2) ※ nitrogen oxides (Nox): ≤15% ( one), dust bag design and manufacture of installation and commissioning of a reference standard GB13223-2003 "air pollutant discharge standard" JB / T8532-1997 "Blowback jet baghouse technology standards" ZBJ88002.2-88 "precipitator performance test Methods "ZBJ88002.3-88" ESP efficiency test "JB / T5917-91" baghouse application framework bag technical conditions "QB700-88" domestic carbon steel Q235 Material standard "GB50205-95" Steel construction inspection norms "GB4053.2-83" fixed steel oblique ladders "" smelting furnace air pollutant emission standards "(GB4915-1996);" dust ventilation system manual ";" Mechanical Engineers' Handbook; "Metallurgical seismic design of buildings" YB9081 -97 "architectural design code for fire protection" GBJ16-87 (Revised Edition) "Building Lightning Protection Design Code" GB50074-94 (Revised Edition) "environmental explosion and fire power plant design specifications" GB50055-93 "production equipment design General Safety and Health" GB3083-85 "Industrial Enterprise Noise Control Design" GBJ87-85 "electrical equipment grounding design specification" SDJ8-79 of the baghouse, ancillary equipment and components meet the approval of a higher standard of corresponding national standard or enterprise, in a bag filter The design and manufacture of priority has been approved by all the international advanced level of noise by the waste, labor and health are in line with national standards and regulations. Test methods and performance bias performance tests in line with the national "GB". 2 baghouse works (1) a major role baghouse dust bag filter mechanism is through the bag when the flue gas dust, soot is retained on the surface of the filter bag, clean the flue gas through the bag fibers gap discharge. Baghouse filter with knitted fiberglass mat materials to achieve the separation of dust flue dust purposes. It's working mechanism is sieving, inertia, adhesion, and static electricity generated when the smoke through a cloth bag, such as diffusion and trapped. 1) use inertia to remove coarse particles of soot. 2) The sieving action (which is the most important work baghouse) flue dust through the filter cloth, the adsorbed dust in the space between the surface of the filter cloth in the filter cloth between fibers or void diameter of the voids is greater than the dust ?? separate, so-called masking effect. For new cloth, due to the large voids between the fibers, this effect is not obvious, low collection efficiency. Only after a certain period of time, the surface of the cloth to establish a certain thickness of the dust layer, screening effect is more pronounced, begins we call this layer of dust filter layer. Since the filter cloth and the inner surface is also a certain amount of residual dust after cleaning i.e. initial filter layer, and therefore, in order to maintain a high collection efficiency. For needle felt or glass fiber cloth, as felt or fiberglass cloth itself constitutes a thick layer of porous filter, give full play to the role of screening can be compared, not all rely on initial filter layer to keep a high collection efficiency. Conditions for a company, now fluoro Gomez media selection, require low initial filter layer, by significantly reducing the initial resistance of the filter layer caused. 2) smoke enters the bag through the filter cloth area inertia fibrous dust flue gas stream through the fiber disturbance, greater than 1 micron dust, due to the collision of the inertia of the fibers and remains linear motion capture. Dust particles of large diameter, the greater inertia. Filtered higher gas velocity and greater inertia, than 1μm dust automatically dropped after hit fibers. 3) When the diffusion soot particles 0.2μm or less, due to the extremely small soot generating thermal motion of the gas molecules such as Brownian motion, increasing the chance of contact with the dust filter cloth surface, so that soot trapped. Such diffusion and inertia contrast, with the filter, to reduce the increase in gas flow rate, reduce the size of the dust is increased. 4) When the smoke close adhesion cloth, tiny soot and air flow together, if the radius is greater than the smoke fumes from the center to the edge of the cloth, smoke caught cloth adhesive sets. The gap is small cloth, the adhesion is also more pronounced. 5) establishing a pre-filter special sprinkler system, buy a new bag, then put into a pre-spray, reduce wet weather can cause the bag, and flue gas moisture adsorption, play a protective bag, prolong life effect ! Structure and working principle precipitator (2) baghouse by the box, in the box, hopper, hopper heaters (user can choose according to demand), the air system, including components, injection device, close the valve, clean blocking air guns, protection systems, control systems and other components. Before total imports into the chimney smoke, you must first detect the temperature, over-temperature flue gas dew point to determine whether or close, when smoke temperature, automatic control system will automatically open the bypass valve. When the flue gas temperature is normal, total imports from the flue imports diffuser evenly distributed to each unit in the dust. Ensure the life of the filter bags, dust bags front bezel area increased, effectively blocking coarse particles and soot are wind pretreatment facilities, the use of the principle of inertia to smoke in the first removal of coarse particles, soot on the bag to reduce erosion coarse particles, whereas before and after the pre-homogenization dust, reduce secondary storage hopper dust and dust bag into the area and improve the uniformity of the flue gas, the possibility to improve the local area of ??the damaged bag. According to the company's working conditions, the baghouse dust form outside the filter type, a uniform distribution of the flue gas from the outer bag into the bag, through the above screening, inertia, adhesion, diffusion effects smoke dust, soot trapped in the bag. Since I use a small caliber punching bags, in normal operation, the change in the bag with the boiler combustion conditions, and some smoke in the bag jitter in a small range of jitter larger particles will automatically fall into the hopper, which can extend the cleaning cycle to ensure running stability. Clean flue gas into the box from the bag after the exhaust valve. To ensure that the bag does not suck in operation deflated ensure vertical bag, shake will not be much in the bag provided special round spring cage bone structure, therefore, dust bag, cleaning the whole process is always to maintain the correct posture . As for the condition was removed, the dust bag adsorption amount gradually increased, the dust absorption to some extent, the resistance to a predetermined value, at this point, you need to clean. Automatically close the valve chamber, the room is not valid, we call this off-line cleaning. After the chamber is offline, the automatic control system to start soot blowing system for the entire cavity injection cleaning, when blowing out a lot of clean air led to a small amount of clean flue gas in a very short time into the filter box room, generating shock waves, making the bag in a short sharp shrinkage, trembling, as the dust is negative, and the rapid contraction, dust off the hopper, the cycle work. After the injection is stopped, deflated bag inflation continued high frequency vibration, the original dust filter, which absorbs the trembling hopper discharge from the conveyor system. After the cleaning is completed, the valve automatically opens, so that the cavity into normal operation. 3, features and advantages of the baghouse (1) Features 1) Efficiency: 99.9% efficiency baghouse dust emission concentration can achieve stability 50mg / m3, only low 20-30mg / m3. Do not worry about environmental indicators require increased again to upgrade again rectification, bag filter is a mature technology. 2) power consumption, low operating costs: Small baghouse power. Convenient 3) repair, maintenance costs low: As baghouse supporting the design of coarse particles of soot pretreatment, all air systems and offline cleaning methods, significantly extending the life of the bag. As a result of the sub-chamber structure, the user can stop the furnace in the case of changing bag, dust control in the fully-controlled state operation, without manual operation. 4) Small footprint: Small size dust bag, you can put the advantages of spatial location, narrow footprint, according to the site can be stacked vertically, horizontal, single, double, due to space and design. And can set aside enough position to lay aside the desulfurization tower. 5) baghouse ontology based system bypass flue, compact structure. Bypassed when the fuel injection combustion and boiler boiler ignition failure, from the protective bag. 6) dry ash collected: substantial profit recovery, reduce labor intensity. Botou Colin dust Equipment Co., Ltd. has advanced level of domestic pipe production equipment specializing in the production of boiler precipitator, IF furnace dust, electric furnace dust, machining dust, quarry dust and various building materials and metallurgical industries precipitators, bag filter covering, single filter, pulse dust collector, cyclone, electrostatic precipitator five series and dust bag, dust bag, dust skeleton, pulse solenoid valve dust and other accessories. More details precipitator Visit Botou Colin dust Equipment Co., Ltd. official website official website one http://www.btkelin.cn II http://www.btkelin.com Contact: Liu Tel: O3l7-8O4l8O2 8257477 7 × 24 小时Hotline: 4OO-697-OO89 Fax: 03l7-83O78O2 phone: l8733O599O9 l53734O3OOO