Method for evaluating comprehensive life of filter bag

Abstract

The invention relates to a method for evaluating the comprehensive life of a filter bag, which comprises the following steps of: 1, determining the mechanical life of the filter bag, judging whether the mechanical life of the filter bag is less than a set threshold value or not, judging that the filter bag needs to be replaced if the mechanical life is less than the set threshold value, and carrying out a second step if the mechanical life is not less than the set threshold value; and 2, determining the processing property service life of the filter bag, and judging whether the filter bag needs to be replaced or not from the three aspects of filter bag air permeability retention rate, filter bag cleaning resistance and filter bag static dust removal efficiency. According to the filter bag comprehensive life evaluation method provided in the technical scheme, the mechanical life of the filter bag is evaluated firstly, if the residual mechanical life of the filter bag does not meet the requirement, filter bag processing property life evaluation does not need to be carried out, and the detection steps, time and cost are reduced; the service life of the process performance of the filter bag is judged from the three aspects of the air permeability retention rate of the filter bag, the clean filter bag resistance and the static dust removal efficiency of the filter bag, so that the performance of the filter bag is more comprehensively and effectively ensured to meet the design requirement of smoke control.

Description

technical field [0001] The invention relates to the technical field of dust collector monitoring and management, in particular to a comprehensive life evaluation method for a filter bag. Background technique [0002] The filter bag is the core of the bag filter system of coal-fired units, and its performance is directly related to the safe and economical operation of the bag filter. During the operation of the bag filter, the performance is attenuated due to the influence of flue gas pollutants and operating conditions. When the performance cannot meet the operation requirements of the bag filter, the filter bag needs to be replaced, and the replaced waste filter bag is used as a solid filter. Waste disposal is difficult. [0003] Since the designed service life of the filter bag is generally 3 to 4 years, it needs to be replaced when it is overdue. Judging from the bag filter that has been running for many years, most units are replaced according to the design life, which ...

AI Technical Summary

Problems solved by technology

During the operation of the bag filter, the performance attenuates due to the influence of flue gas pollutants and operating conditions. When the performance cannot meet the operating requirements of the bag filter, the filter bag needs to be replaced, and the replaced waste filter bag is used as a solid Waste disposal is difficult

[0003] Since the design service life of the filter bag is generally 3 to 4 years, it needs to be replaced if it is overdue. Judging from the bag filter that has been in operation for many years, most units are replaced as soon as the design period expires, lacking effective filter bag operation. If the actual performance of the filter bag still meets the requirements, it will be replaced when the actual performance of the filter bag is judged. At this time, the real service life of the filter bag will be reduced, and the operating cost of dust removal will be increased. In addition, the actual operating conditions of individual coal-fired units are relatively bad, and excessive loss of filter bags will occur. If the phenomenon occurs, the filter bag may need to be replaced before it reaches the design life. If it is not replaced in time, the smoke and dust emission will exceed the standard.

At present, there is a lack of reasonable comprehensive life evaluation methods for filter bags

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