Online leak finding method for bag filter

Abstract

The invention discloses an online leak finding method for a bag filter. The method comprises the following steps: a light source, a camera and an image processor are arranged; the light source is fixedly mounted in the bag filter, and is located above a plurality of bag filter bags of the bag filter, lights emitted by the light source irradiate particle dusts filtered out by the bag filter bags, and the lights do not contact the flower plate of the bag filter; the camera is mounted above the light source, and shoots the particle dusts irradiated by the lights to obtain the images of the particle dusts above the bag filter bags; and the image processor analyzes the continuously obtained images, and if analysis shows the change abnormity of the density and the spot size of the particle dustsper unit area, the bag filter bag just below the particle dusts having the abnormal change is determined to be broken. The method has the advantages of high efficiency, accuracy, low cost and the like.

Description

Technical field [0001] The invention belongs to the field of environmental protection, and relates to a bag filter, in particular to an online leak catching method of the bag filter. Background technique [0002] Strict control of the emission concentration of exhaust particulate matter is one of the core indicators of national environmental protection management and control. With the continuous tightening of the national environmental protection policy, the emission concentration of particulate matter in exhaust gas has been reduced from the previous 200mg / m 3 Down to 100mg / m 3 , And then control to 50mg / m 3 And 20mg / m 3 , The latest emission requirement is not more than 10mg / m 3 . For this reason, all domestic industrial enterprises have carried out the transformation of dust collectors, especially those from 20mg / m 3 Control to 10mg / m 3 Under the circumstances, the ability to tap the potential surplus of the original dust collector can basically achieve the emission target, bu...

AI Technical Summary

Problems solved by technology

[0003] At present, in order to reduce investment and ensure that environmental protection emissions meet the standards, domestic industrial enterprises are forced to shut down offline to catch leaks when the bags are damaged and the emissions exceed the standards.

In the actual production process, it is often impossible to accurately catch leaks due to the small degree of damage to the bag. This will not only result in a longer time for leak detection, but also have a great impact on the main process of the production process. In the case of being unable to accurately locate the damaged bag, In order to ensure that environmental protection meets the standards, maintenance personnel are often forced to replace suspected damaged bags on a large scale, or even replace the entire box of filter bags as a whole, resulting in a large loss of manpower, financial resources and production capacity.

[0004] Aiming at the problem of catching leaks in bag filter, some domestic enterprises have used phosphor powder tracking method to track damaged bags. However, phosphor powder is expensive and requires a large amount of usage, which increases the cost of equipment operation and maintenance. At the same time, phosphor powder The addition of will bring the problem of resource utilization of dust removal

Another way to catch leaks is differential pressure detection method, that is, install a pressure detector at the outlet of each filter bag, and judge the damage of the filter bag by tracking the change of pressure difference of each filter bag. low capture efficiency

In addition, the pressure detection method not only requires each filter bag to be equipped with a separate detection element, resulting in a large one-time investment cost, but also the detection element will cause high maintenance costs due to dust wear

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