How to reduce the resistance of the pulse dust collector

How to reduce the resistance of the pulse dust collector? There are some resistance issues when designing a dust collector device. What is the resistance of the pulse dust collector equipment?

1. When the gas enters the dust collector outlet from the inlet of the dust collector, the main body of the pulse dust collector device generates resistance.

2. When the gas passes through the dust bag, the dust bag will filter out the dust in the gas, and then there will be corresponding resistance.

3. When the dust in the long-term filtered gas of the dust bag accumulates on the bag, if the gas passes through the bag in this state, resistance will also be generated, and the resistance time at this time is much larger than that of the clean bag. The resistance of time.

Sometimes the pulsed dust collector equipment will run for a long time, which will increase the resistance of the dust collector equipment and will not achieve the original purification effect. If the resistance of the pulse dust removal device increases, how do you reduce the resistance? Yongming Machinery introduces you to three points:

1. Develop a reasonable filtering wind speed

The resistance of the bag filter depends to a large extent on the filtration wind speed, and as the filtration wind speed increases, the resistance of the dust collector structure, the dust bag and the dust layer also increases. Regardless of which filter material is used in the pulse bag filter, the net filter wind speed must not exceed 1 m / min. For the fine dust layer, since the dust particles are closely connected to each other, a lower filtering wind speed is required, otherwise the running resistance of the dust collector is greatly increased. However, many dust-removing equipment manufacturers must be more competitive in the market competition when selecting products, and the equipment resistance of such dust collectors must be higher than normal for the purpose of reducing the filtering wind speed to reduce the equipment cost.

2, control the air flow speed

The rate of rise of the airflow refers to the flow rate of the flue gas in the space of the dust bag. The rate of rise of the airflow is an important parameter to measure the performance of the precipitator. It has a great influence on the performance of the low pressure pulse bag filter. Under the same air volume, the airflow rising speed is large, indicating that the distance between the dust bag and the dust bag is small in the effective bag space, the dust bag is more compact, and the shape of the dust collector is small, but the air flow rises. If the speed is too high, the running resistance of the dust collector will increase accordingly. Typically, the airflow rate is controlled to approximately 1 m / s to better utilize the performance of the precipitator.

3, scientifically improve the cleaning effect

The dust layer on the surface of the dust collector has a great influence on the running resistance of the dust collector, so the cleaning effect is particularly important. There are many factors that affect the cleaning effect of the low pressure bag filter, such as the blowing pressure, the cleaning cycle, the length of the bag, and the distance between the bag and the bag. If there is not enough blowing pressure and energy, the dust layer on the surface of the dust bag will not be completely removed. However, the blowing pressure should not be too great, otherwise the service life of the dust bag will be greatly shortened. The injection pressure needs to be controlled within a reasonable range and needs to be flexibly adjusted according to the degree of viscosity of the dust. The injection pressure should be controlled between 0.2 MPa and 0.4 MPa. From the point of view of reducing the running resistance of the dust collector, the surface of the dust bag is always in a clean state and the resistance is small, which requires frequent dust removal of the dust bag, but the service life of the filter bag is impaired. . Therefore, in the actual operation, it is necessary to flexibly adjust the cleaning cycle according to the concentration of dust in the flue gas and the viscosity of the dust.

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