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The warehouse roof precipitator Selection of skills
2012-12-03
Warehouse roof dust filter instrument The warehouse roof precipitator filter is made of polyester fiber filter cloth, which has high strength, wear-resistant, high temperature resistant, good elasticity, not moldy, not afraid of insects, washable dry etc.. The warehouse roof precipitator selection skills:1, process air volume of the processing air... Warehouse roof dust filter instrument The warehouse roof precipitator filter is made of polyester fiber filter cloth, which has high strength, wear-resistant, high temperature resistant, good elasticity, not moldy, not afraid of insects, washable dry etc.. The warehouse roof precipitator selection skills:1, process air volume of the processing air amount (Q) refers to the dedusting equipment in the unit time can the volume of the purge gas. Units of cubic meters per hour (m3 / h) or standard cubic meters per hour (Nm3 / h). Is one of the most important factors in the design of the warehouse roof dust. Design or select a baghouse according to the amount of wind, and generally can not make dust collector bag in the case of exceeding the prescribed amount of wind, otherwise, the filter bag is easy to plug the shortened life expectancy, a significant increase in the pressure loss, collection efficiency should reduce; but can not The selected air volume is too large, otherwise the increase in investment in equipment and covers an area of. Reasonable choice of process air volume is often based on the technology and experience of the decision.2, the use temperature for the baghouse, its temperature is dependent on two factors, the first is the maximum temperature of filter media, and the second is the gas temperature must be above the dew point temperature. Currently, due to a large selection of fiberglass filter media, its maximum use temperature up to 280 ℃, must take measures to cool the gas above this temperature, and temperature measures must be taken to lower than the dew point temperature of the gas. Baghouse, the relationship between temperature and dust removal efficiency is not obvious, which is different from the electrostatic precipitator, electrostatic precipitator, temperature changes will affect the impact of collection efficiency of dust specific resistance.3, inlet dust collector bag that entrance dust concentration, this is the decision process by dust points, it is second only to deal with the amount of wind is an important factor in the design or select a baghouse. G/m3 or g/Nm3 said. Baghouse inlet dust collector bag will directly affect the following factors: ⑴ pressure losses and a cleaning cycle. Inlet concentration increases, the speed fouling on the same filtering area, the pressure loss increases, the result is forced to increase cleaning times. ⑵ the wear and tear of the bag and the box. In the case of dust having a strong abrasive wear can be considered proportional to the dust concentration. ⑶ received in advance of dust whether necessary. Advances from dust before precipitator at the entrance to add a dust removal equipment, also known as the former level dust. (4) exclusive the ash ash discharge capacity of the device. The row of gray ash discharging capacity of the device should be subject to discharge all accept the dust, the dust amount equal to the inlet dust concentration multiplied by the process air volume. ⑸ operation. The baghouse is divided into positive and negative two operating modes, to reduce fan wear, the inlet concentration should not be a positive pressure mode of operation.4, the outlet dust concentration outlet dust concentration refers to the emission concentration of the dust collector bag, the same inlet dust concentration, the size of the outlet dust concentration should be subject to the requirements of the local environmental requirements or user baghouse emission concentration generally able to achieve less than 50 g/Nm3.5, the pressure loss of the pressure loss of the dust bag is the gas from the precipitator inlet to the outlet of the pressure drop, or resistance. The bag dust pressure loss depends on the following three factors: ⑴ the pressure loss of the device structure. ⑵ filter pressure loss. (Such as porosity, etc.) is related to the nature of the filter media. The dust accumulation layer ⑶ filter pressure loss.6, the operating pressure of the operating pressure baghouse also baghouse design voltage value is determined according to the static pressure value of the precipitator around the apparatus and the fan and its mounting position. View Details
Specific requirements of cement silo top dust collector bag
2012-12-03
Warehouse roof dust filter instrument The warehouse roof precipitator filter is made ??of polyester fiber filter cloth, which has high strength, wear-resistant, high temperature resistant, good elasticity, not moldy, not afraid of insects, washable dry etc.. Cement silo top national quality inspection requirements the precipitator specific requirem... Warehouse roof dust filter instrument The warehouse roof precipitator filter is made ??of polyester fiber filter cloth, which has high strength, wear-resistant, high temperature resistant, good elasticity, not moldy, not afraid of insects, washable dry etc.. Cement silo top national quality inspection requirements the precipitator specific requirements: (1) dust collector bag to rely on high-tech, streamline processes, optimize the structure, to achieve efficient dust removal, reducing the main body weight, reduce equipment cost.(2) dust collector bag to precipitators use of advanced technology and science to reduce energy consumption, lower operating costs;(3)dust collector bag to  the precipitator organizations dust purification deep processing and comprehensive utilization to be effective.(4) enhance precipitator good rate and utilization management to be effective.We must be fitted with the equipment, cement silo top filter can not only save money and protect the environment, but also can improve the working environment, reduce the incidence of occupational diseases. View Details
dust filter bag in dealing with corrosive gases
2012-09-25
  Corrosive gases, dust project occasions: heavy fuel containing sulfuric acid gas; chlorine and chlorine oxidation of Taiwan objects generated in the metal melting furnace using a flux and fluorinated gases; incinerator burning garbage generated sulfur, chlorine fluorine gas; sawdust boilers produce wood vinegar gas. Corrosive gases in case ...   Corrosive gases, dust project occasions: heavy fuel containing sulfuric acid gas; chlorine and chlorine oxidation of Taiwan objects generated in the metal melting furnace using a flux and fluorinated gases; incinerator burning garbage generated sulfur, chlorine fluorine gas; sawdust boilers produce wood vinegar gas. Corrosive gases in case of water produce salts of dust particles, belonging to the second bit of corrosion. Dust corrosion, moisture and temperature are closely related. Corrosive gases or particles of dust processing should take appropriate technical measures.1, the corrosion resistance of the filter clothThe corrosion resistance of the filter material conditions of use vary, this section only in respect of the application of this material temperature corrosion-resistant summarized as follows:① polypropylene filter cloth. Usually good corrosion resistance, and inexpensive filter cloth, but when used in lead and other special metal oxide and the like under conditions, such as when the temperature can promote the oxidation, the corrosion resistance can be decreased.② polyester filter cloth. Polyester filter cloth bag filter is the most widely used corrosion-resistant filter cloth. Use dry gas temperature <120 degrees, the effect is very good.(3) heat-resistant nylon filter cloth. Nylon filter cloth is a good corrosion resistant filter cloth. But in the higher concentration in the combustion exhaust gas of SOx the shorter life, its phosphorylation gas resistance Terrible.④ Teflon filter cloth. The corrosion resistance is no problem, but expensive.(5) glass fiber filter cloth. The corrosion resistance is not a big problem. Also useful for fluorine-containing resin, such as spraying in order to enhance the acid resistance of the heat-resistant nylon.dust filter bag to sulfuric acid corrosion or corrosion situation more similar nature. So, its working temperature required to maintain at all times in the various acids above. This means that the insulation casing of the dust bag is a very effective anti-corrosion means; Conversely, if the wrong tank insulation, in strong winds and rains due to the case of cold temperature decreased, then the dust bag filter casing inevitable acid condensation within. Anti-corrosion and condensation prevention measures complement each other.2, precipitator cabinet corrosiondust filter bag box materials, almost all of Q235 steel. A small number of industrial sectors in the pharmaceutical, food, chemical, although the use of stainless steel, but its purpose in addition to anti-corrosion, but also to prevent rust mixed with the product or products.For sulfur oxides generated by heavy oil, coal and other materials, ordinary steel, coated with a temperature and acid-resistant coating. Such coatings as silicon resin-based or epoxy-based. Serious corrosion stainless steel plate heat acid coating or brushing on the steel plate, together with a partial surface treatment.Strong corrosive gas cook the the dust filter bag casing inner wall lining of plastic, rubber or fiberglass. Baghouse filter except that the collected dust in the production process, the presence of corrosive gases, most due to the high temperature treatment to produce. In this View Details
Dust collector bag performance of detection methods
2012-09-05
    Field in the dust bag, dust collector bag are often likened to the heart of the baghouse, bag filter can handle what kind of dust-laden flue gas mainly depends on the chemical fiber used to manufacture dust collector bag conditions . So we have to understand the dust collector bag performance test method, in order to se...     Field in the dust bag, dust collector bag are often likened to the heart of the baghouse, bag filter can handle what kind of dust-laden flue gas mainly depends on the chemical fiber used to manufacture dust collector bag conditions . So we have to understand the dust collector bag performance test method, in order to select the most appropriate dust collector bag.   Dust collector bag need to test and test as follows:  1. Appearance inspection: puncture defects, spots, jumper, disconnection, connector.  The physical properties: such as the organization of the dust bag of the mass per unit area, thickness, and amplitude, woven fabric density, the volume of the non-woven fabric density, porosity, etc..  Mechanical properties: dust bag breaking strength, elongation at break, the latitude and longitude of the bag to the load elongation, the bursting of the filter material strength.  Dust features: such as the drag coefficient, static collection efficiency, dynamic collection efficiency, dynamic resistance of the filter media regeneration resistance coefficient and dust stripping ratio.  5. Special features: such as heat resistance, corrosion resistance, electrostatic properties, hydrophobicity etc..   The general condition of the flue gas temperature, only need to bag resistance temperature of 150 ° C or below, these occasions, polyester, polypropylene, acrylic, nylon, chemical fiber basic competence. Occasions for the flue gas temperature is relatively high, you need to select the high-temperature filter material, such as glass fiber needle felt dust bag, fluorine U.S. Andean dust bag, the US-Tasman dust bag, PPS dust bag.The advantages of the dust bag is:  1, the use of flexible, process air volume can be hundreds of cubic meters per hour to hundreds of thousands of cubic meters per hour, can be as directly located in the room, small units of the machine near a large dust chamber can also be made​​, namely "bag room.  2, high collection efficiency, trapping fine dust particles larger than 0.3 microns, the collection efficiency of up to 99% or more.   3, the structure is relatively simple, stable running, initial investment is small, and easy maintenance.The products Star Chinese environmental production of bag filter, pulse jet bag filter dust collector bag, star unloader widely used in the country and one large enterprise. View Details