Dedusting technology of pulse bag filter of dryer

In order to adjust the overall operation of the bag type dust remover in Huiyang dryer, a detailed plan has been made for the condensation of the inner bag, the dust cleaning of the bag, and the selection of the air cloth ratio of the bag type dust remover The dryer as a whole adopts 6 design schemes to adjust the indicators of the dryer, which is used to improve the dust removal process of the dryer pulse bag filter In the practical application of the dryer dust remover, the following technological design schemes are mainly adopted: 1 In the design of the ventilation and dust removal system of the dryer tail, the dryer bag type dust remover is used as the primary dust removal, which not only simplifies the technological process, reduces the system resistance, but also reduces the air leakage of the system 2 The allowable Zui high temperature of the bag filter of the drying machine is ≤ 180 ℃ The flue gas above this temperature shall not enter the dust remover directly, and the "cold air valve" installed on the air inlet pipe shall be used to mix into the atmosphere to reduce the temperature of the flue gas automatically 3 The selection of anti condensation filter material glass fiber filter material after special treatment has excellent anti condensation performance and high strength, especially the folding resistance and wear resistance are several times higher than that of plain glass fiber filter material, with low resistance, high dust removal efficiency, stability and reliability The glass fiber filter material of the company has no obvious stripes on its surface, the fabric is smooth, flat and easy to remove dust It is an ideal filter material for filtering wet and sticky dust, and is more suitable for the application in the flue gas dedusting of the dryer 4 Filtration wind speed filtration wind speed (M / min) refers to the air flow through the filter cloth per unit area in unit time, that is, the air cloth ratio (m3 / m2 · min) The filtering wind speed not only determines the size of the dust remover, but also has a decisive influence on the efficiency, resistance, cleaning effect and filter bag life In order to ensure the high efficiency, low resistance and stable operation of the precipitator, generally, the filtration air speed of the glass fiber filter material is less than 0.5m/min 5 Anti condensation technical measures heat preservation measures shall be taken for the air inlet pipe, shell and ash hopper of the dust remover to reduce the heat dissipation of the shell, and the heat preservation layer is also conducive to the heat storage of the equipment The actual application shows that the temperature difference between the inlet and outlet of the bag filter is small, and the expected insulation effect is achieved 6 The key of bag type dust remover of dryer with microcomputer automatic control system is to clean the dust, and the quality of cleaning the dust is related to the cleaning control mechanism The microcomputer control cabinet developed by us has proved in the long-term production practice that the application is reliable, the parameter adjustment is convenient, and the normal work of bag type dust remover is ensured The design features of bag type dust remover of dryer: 1 Adopting pulse blowing dust cleaning technology, it has strong dust cleaning capacity, high dust removal efficiency, low emission concentration, small air leakage coefficient, low energy consumption, small steel consumption, small floor area, stable and reliable operation, and good economic benefits It is suitable for flue gas treatment in electric power, building materials, metallurgy, chemical industry, etc 2 The box body adopts airtight design, with good airtightness The door is checked with excellent sealing materials The production process uses kerosene for leakage detection, with low air leakage rate 3 Compact inlet and outlet air duct and uniform device, low airflow resistance 4 It has the advantages of long cleaning cycle and low consumption It can increase the service life of dust bag and electromagnetic pulse valve 5 It can change bags without stopping the machine, and maintenance will not affect the normal operation of the equipment 6 The operation of bag changing is improved by the way of upper bag drawing 7 Perfect control system to ensure long-term operation of dust removal system 8 It can adapt to the flue gas composition of various dryers, especially the situation of one dryer drying various materials, as well as the wide range fluctuation of waste gas properties 9 The process layout is simple, because this kind of dust remover can directly deal with the high concentration dust containing waste gas, so it can adopt the first level dust collection in the dust removal system of the dryer waste gas, which simplifies the process flow, reduces the system resistance and power consumption 10 Advanced control technology, high degree of automation, simple maintenance and management 11 A new type of anti condensation filter material is specially designed for the dust removal of the dryer, which enhances the anti moisture and anti-corrosion performance of the filter material, not only prolongs the service life of the filter material, but also ensures good ventilation performance 12 The system has advanced process design and reasonable process parameters, which can effectively reduce the energy consumption of the whole system and strengthen the ventilation of the system Improving the heat exchange performance of the dryer is conducive to increasing the output and reducing the final moisture content of the dried materials Process principle of dryer dust remover: The flue gas temperature, dust concentration and moisture content of the dryer fluctuate widely, especially the flue gas dew point temperature is high, a dryer often dries many materials, the dust property changes frequently, the flue gas is corrosive, and the dryer starts and stops when it starts, which brings great difficulties to the dust removal of the dryer The dust removal of the dryer has become a problem in the cement plant Our company has The special pulse bag filter of the dryer successfully solved the problem of dust control The utility model adopts water repellent, oil-proof and dust removing cloth bag, and pipe type spray dust removing technology, which not only has the advantages of strong dust removing ability, high dust removing efficiency and low emission concentration of the air box pulse dust remover, but also has the advantages of small floor area and large air volume per unit area The dust remover adopts a large number of new technologies and high-quality parts, and its adaptability, use reliability and automation degree are greatly improved High, can ensure long-term operation with the main equipment, dust removal equipment export emission concentration is lower than the national provisions of the emission concentration, is the dryer dust control ideal equipment.