Characteristics and application of environmental protection equipment of DDF large bag type back blowing bag filter
发布时间:2021/7/21
DDF large bag type back blowing dust collector is a kind of large dust removal equipment with large air volume, good dust removal effect, good dust removal efficiency, stable operation, convenient maintenance and small floor area. DDF large bag type back blowing dust collector is widely used in dust control and material recovery in metallurgical industry, steel-making, blast furnace raw material preparation, building materials industry, electric power, chemical industry, carbon black, asphalt concrete mixing, boiler, flue gas dust removal and other industries.
DDF large bag type back blowing dust collector is widely used in steel plant, smelter, cement plant, carbon black plant, power station and other enterprises to purify and recover the smoke and dust produced by smelting, crushing, screening and combustion. It is to protect the physical and mental health of the operator and the people, the growth of crops, the wear and tear of mechanical equipment, the pollution of the social environment and the recycling of useful dust to reduce the cost of equipment.
The arrangement number of filter bags with 1000m2 is the arrangement number of 2w2; 3000-90000m2 is the number of rows in 2w4w2 layout. 1800m2 is the row number of 3w3; 10000 M2 is the number of rows under the arrangement of surrounding passages. W stands for access. The inlet temperature of 729 and 734 polyester cloth is less than 1500 ℃; After three generations of treatment, the temperature resistance of glass fiber cloth is less than 3000 ℃.
2. Good dust collection efficiency: for the gas with dust concentration less than 50g / Nm3, the dust collection efficiency can reach 90%.
3. Good soot cleaning effect: all parts of the injection device have excellent aerodynamic characteristics. When the injection pressure is 0.20mpa ~ 0.25MPa, it still has good soot cleaning effect for purifying the gas with high dust concentration and high moisture content.
4. Small floor area: the length of filter bag is 6 meters, the filtering wind speed can be selected between 1 m / min and 1.5 m / min, and the floor area is smaller than that of conventional pulse and reverse blowing bag filter.
5. Excellent control technology: the electrical control system adopts programmable controller, with four optional functions of on-line ash cleaning, off-line ash cleaning, constant pressure differential ash cleaning and timing ash cleaning, and has pressure and temperature detection system and manual control mode, with long service life and easy on-site adjustment.
DDF large bag type back blowing dust collector is divided into positive pressure type (also known as press in type) and negative pressure type (also known as suction type). This manual is introduced according to negative pressure type.
Under the action of negative pressure, the dusty gas enters into the lower ash hopper through the air inlet pipe, and a baffle plate is set on the front of the air inlet. The coarse dust falls into the ash hopper by impact and gravity. The fine dust is filtered by the filter bag and adsorbed on the inner wall of the filter bag. The purified gas is sucked into the fan through the switch valve on the top of the equipment through the exhaust pipe, and then discharged into the atmosphere through the exhaust pipe.
When the dust on the filter bag increases continuously and the resistance rises to the specified value, the dust cleaning begins. The dust cleaning mode of the equipment depends on the single chamber reverse blowing mode. When reverse blowing, close the exhaust pipe through the reversing valve, open the reverse blowing pipe, and cut off the exhaust air of the single chamber. Because the air inlet pipes of each room of the equipment are connected, and are in a negative pressure state, the negative pressure suction effect of the adjacent room. The air flow is sucked into the filter bag chamber through the reverse blow pipe. Through the filter bag, the air flow enters the inner side from the outside of the filter bag, and is sucked into the adjacent chamber through the ash hopper and the air inlet pipe of the chamber for discharge. At this time, the filter bag is sucked. The dust inside the filter bag is then shaken off and settled into the ash hopper to complete the ash cleaning of the single chamber. Under the control of the ash cleaning actuator, the other chambers carry out the same sequence of ash cleaning. When the limit value is reached, the ash cleaning stops.
DDF large bag type back blowing dust collector is widely used in steel plant, smelter, cement plant, carbon black plant, power station and other enterprises to purify and recover the smoke and dust produced by smelting, crushing, screening and combustion. It is to protect the physical and mental health of the operator and the people, the growth of crops, the wear and tear of mechanical equipment, the pollution of the social environment and the recycling of useful dust to reduce the cost of equipment.
The arrangement number of filter bags with 1000m2 is the arrangement number of 2w2; 3000-90000m2 is the number of rows in 2w4w2 layout. 1800m2 is the row number of 3w3; 10000 M2 is the number of rows under the arrangement of surrounding passages. W stands for access. The inlet temperature of 729 and 734 polyester cloth is less than 1500 ℃; After three generations of treatment, the temperature resistance of glass fiber cloth is less than 3000 ℃.
Technical features of DDF large bag type back blowing dust collector:
1. Large air volume: suitable for all kinds of dust characteristic flue gas, the air volume can reach 110 × 104m3/h。2. Good dust collection efficiency: for the gas with dust concentration less than 50g / Nm3, the dust collection efficiency can reach 90%.
3. Good soot cleaning effect: all parts of the injection device have excellent aerodynamic characteristics. When the injection pressure is 0.20mpa ~ 0.25MPa, it still has good soot cleaning effect for purifying the gas with high dust concentration and high moisture content.
4. Small floor area: the length of filter bag is 6 meters, the filtering wind speed can be selected between 1 m / min and 1.5 m / min, and the floor area is smaller than that of conventional pulse and reverse blowing bag filter.
5. Excellent control technology: the electrical control system adopts programmable controller, with four optional functions of on-line ash cleaning, off-line ash cleaning, constant pressure differential ash cleaning and timing ash cleaning, and has pressure and temperature detection system and manual control mode, with long service life and easy on-site adjustment.
6. Convenient operation and daily maintenance: the opening of the filter bag adopts the elastic expansion ring, which can be directly embedded in the flower board. It is not only sealed, but also easy to disassemble, which greatly improves the labor intensity of the operators.
DDF large bag type back blowing dust collector is divided into positive pressure type (also known as press in type) and negative pressure type (also known as suction type). This manual is introduced according to negative pressure type.
Under the action of negative pressure, the dusty gas enters into the lower ash hopper through the air inlet pipe, and a baffle plate is set on the front of the air inlet. The coarse dust falls into the ash hopper by impact and gravity. The fine dust is filtered by the filter bag and adsorbed on the inner wall of the filter bag. The purified gas is sucked into the fan through the switch valve on the top of the equipment through the exhaust pipe, and then discharged into the atmosphere through the exhaust pipe.
When the dust on the filter bag increases continuously and the resistance rises to the specified value, the dust cleaning begins. The dust cleaning mode of the equipment depends on the single chamber reverse blowing mode. When reverse blowing, close the exhaust pipe through the reversing valve, open the reverse blowing pipe, and cut off the exhaust air of the single chamber. Because the air inlet pipes of each room of the equipment are connected, and are in a negative pressure state, the negative pressure suction effect of the adjacent room. The air flow is sucked into the filter bag chamber through the reverse blow pipe. Through the filter bag, the air flow enters the inner side from the outside of the filter bag, and is sucked into the adjacent chamber through the ash hopper and the air inlet pipe of the chamber for discharge. At this time, the filter bag is sucked. The dust inside the filter bag is then shaken off and settled into the ash hopper to complete the ash cleaning of the single chamber. Under the control of the ash cleaning actuator, the other chambers carry out the same sequence of ash cleaning. When the limit value is reached, the ash cleaning stops.
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