Cyclone and bag dust collection integrated device

Abstract

The invention provides a cyclone and bag dust collection integrated device and relates to the technical field of dust collection. Under the condition that respective working principles of a cyclone dust collector and a bag-type dust collector are not damaged and dust collection efficiency and implementing criterion of engineering are guaranteed, the cyclone dust collector, the bag-type dust collector and an ash silo are designed into an integrated structure, and the device occupies a small floor area, saves the occupied area and is applicable to transformation of old plant areas and higher inadaptability; according to the device, the respective working principles of the cyclone dust collector and the bag-type dust collector are not damaged, powerful combination of the two dust collectorsis guaranteed, 90% or higher of large-particle dust is removed by the cyclone dust collector, then, the remaining dust is removed by the bag-type dust collector, and the dust removing efficiency of the bag-type dust collector is improved; with the adoption of the cyclone dust collector for preliminary dust collection, not only is the burning probability of bags in the bag-type dust collector due to sparks entrained by exhaust gas eliminated, but also frequency of pulsating dust-cleaning of the bag-type dust collector is reduced, therefore, the service life of the bag-type dust collector is prolonged, and operation and maintenance cost of the dust collectors is reduced.

Description

technical field [0001] The invention relates to the technical field of dust removal, in particular to an integrated cyclone bag dust removal device. Background technique [0002] With the improvement of air pollutant discharge standards, the use of a single flue gas dust removal device has been unable to meet the requirements of flue dust treatment. At present, there are two-stage dust removal methods for dust removal, that is, to use pipes to connect two dust removal devices together, and then connect the two dust removal devices to the ash storage respectively, and store the dust in the ash storage. Although this method can Increase the dust removal efficiency, but need to build a separate ash store and lay pipelines, resulting in a large area of ​​the entire dust removal system, such as a cement factory kiln or a boiler semi-dry desulfurization tower with an outlet smoke concentration as high as 1000g / m3, the cost will be greatly increased increase; and for the old facto...

AI Technical Summary

Problems solved by technology

[0002] With the improvement of air pollutant emission standards, the use of a single flue gas dust removal device has been unable to meet the requirements of flue dust treatment

At present, there are two-stage dust removal methods for dust removal, that is, to use pipes to connect two dust removal devices together, and then connect the two dust removal devices to the ash storage respectively, and store the dust in the ash storage. Although this method can Increase the dust removal efficiency, but need to build a separate ash store and lay pipelines, resulting in a large area of ​​the entire dust removal system, such as a cement factory kiln or a boiler semi-dry desulfurization tower with an outlet smoke concentration as high as 1000g / m3, the cost will be greatly increased increase; and for the old factory area, even if the cost issue is not considered, due to space and site constraints, it is still facing the embarrassment that it is impossible to carry out the transformation

In addition, in order to improve the efficiency of dust removal, the dust after cyclone dust removal directly enters the bag filter. Since the high-temperature flue gas is entrained with unburned carbon particles, the carbon particles will burn the bag after encountering the bag filter, resulting in Leakage of the filter bag, on the one hand, reduces the dust removal efficiency and even makes it difficult to meet the standard. On the other hand, the filter bag of the bag filter needs to be replaced frequently, which increases the cost of the enterprise

However, simply assembling two dust collectors with different mechanisms together by canceling the connecting pipes, the cyclone dust collector usually requires the gas flow rate at the air inlet and outlet to be 20-25m / s when designing, and the bag dust collector is designed to However, it is usually required that the air speed is less than 3m / s, and the filtration speed of the filter bag is 0.8-1.0m / min. If they are directly put together, it is impossible to obtain high-efficiency dust removal efficiency. application

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