How to cool the high temperature bag filter

Bag dust collectors are divided into positive pressure type (also known as press-in type) and negative pressure type (also called suction type). This manual is introduced in negative pressure type. Under the action of negative pressure, the dust-containing gas enters the lower hopper by the air inlet pipe, and a baffle plate is arranged on the front side of the air inlet port. The coarse dust is dropped into the ash bucket by the impact and gravity, and the fine particle dust is filtered through the filter bag. After that, the suction is sucked on the inner wall of the filter bag, and the purified gas passes through the bag filter chamber, is sucked into the fan through the exhaust pipe through the top of the device, and then discharged into the atmosphere through the exhaust pipe.

Bag filter technology features:

1. The submerged pulse valve is used for quick opening and closing, and its own resistance is small. For the filter bag of 6 meters to 8 meters long, the injection pressure is only 0.15 ~ 0.3MPa, and a good cleaning effect can be obtained.

2, strong cleaning ability. The acceleration obtained on the surface of the filter bag during cleaning is far greater than that of other types of bag filters, and the cleaning is uniform and the effect is good.

3. High filtration load. Due to the strong dust protection, even if the bag filter is operated at a higher filtering wind speed, the resistance will not be too high, generally 1200 ~ 1500Pa, compared with the anti-air dust collector, the same filter area, pulse bag type The dust collector has a larger processing air volume.

4. It is convenient to check and replace the filter bag. The filter bag is easy to install and change bags without tying. The operator does not need to enter the inside of the cabinet, and the operating environment is good.

5. The equipment cost is low. Due to the high filtration load, the required filtering area for processing the same amount of flue gas is smaller than that of the reverse blow bag type dust collector, so the equipment is compact and the floor space is small.

6. Advanced control technology. The control system with PLC programmable controller as the host controls the operating parameters such as dust collector cleaning, inlet flue gas temperature and cleaning pressure, and has complete functions, stable and reliable.

The bag filter is an efficient dust removal device, which can effectively purify the air to achieve the purpose of dust removal. Since some smoke sometimes has a temperature of up to 550°, the bag filter can not get used to this environment, so the method of cooling the bag filter should be:

A gas cooler is placed in the baghouse to assist in lowering the temperature in the air, air and water, and some cool breeze and water cooling. These cool and cold waters can help cool the flue gas and then lower the warmth of the bag filter.

The bag filter can be installed with a cool air valve at high temperature. This cool air valve mainly prevents some high-temperature smoke from entering the dust collector. It is used for conditioning. One end of the bag is connected with the high temperature pipe. The other end is connected to the atmosphere. Therefore, before using the bag filter, Zui Jia is equipped with these devices, so that the function of the precipitator can be very well developed, and the dust collector will not be damaged due to unacceptable high temperature. Some low-temperature flue gas can be properly mixed. If the temperature of the gas is different in the precipitator, a part of the low-temperature gas is first mixed into the high-temperature flue gas, so that the gas can be mixed so that the temperature in the precipitator is not the same. As high as that.

In the bag filter, the air bag pulse bag filter adopts a smooth flow downstream design, that is, the air flow enters from the upper box of the dust collector and is discharged from the clean air header of the lower box. The flow direction is consistent with the direction of the pulse blowing and the direction of the dust falling into the ash hopper after the cleaning, and the purified air does not pass through the ejector throat, which greatly reduces the dust collector resistance, reduces the fan load, and saves power consumption. Conducive to dust deposition.