Pneumatic ash conveying control method

Abstract

The invention relates to the technical field of ash conveying control, and discloses a pneumatic ash conveying control method, which comprises the following steps that ash bins of a plurality of bag-type dust removers are regularly and automatically started and stopped to carry out bag-type dust removal and pneumatic ash conveying; the plurality of bag-type dust remover ash bins corresponding to each pneumatic ash conveying pipeline perform pneumatic ash conveying in sequence according to a timing mode, and the plurality of pneumatic ash conveying pipelines perform pneumatic ash conveying intermittently in sequence; a signal that the last bag-type dust remover ash bin of the first pneumatic ash conveying pipeline stops bag-type dust removal is used as a delay trigger signal that the first bag-type dust remover ash bin of the second pneumatic ash conveying pipeline starts bag-type dust removal; and the signal that the last bag-type dust remover ash bin of the last pneumatic ash conveying pipeline stops bag-type dust removal is used as a delay trigger signal that the first bag-type dust remover ash bin of the first pneumatic ash conveying pipeline starts bag-type dust removal. According to the pneumatic ash conveying control method, abrasion of the ash conveying pipelines and valves is reduced, and the service lives of the ash conveying pipeline and the valve are prolonged.

Description

technical field [0001] The invention relates to the technical field of ash conveying control, in particular to a control method for pneumatic ash conveying. Background technique [0002] Boiler equipment is a long-term continuous operation device, and bag dust removal and pneumatic ash transportation are also long-term operation as boiler supporting facilities, such as figure 1 As shown, but because the blowing dust of the bag filter occurs periodically and intermittently, this leads to uneven ash delivery of the long-term operation of the pneumatic ash delivery control system. When the amount of ash falling is small, a large amount of air contains a small amount of ash powder. During the pressurized transportation process of the pipeline, the quality of the conveying medium is greatly reduced, and the flow rate is doubled. Scouring and wear, while improving the sealing level requirements of the valve. [0003] There are four sets of pneumatic ash conveying systems in the ...

AI Technical Summary

Problems solved by technology

Such high-frequency action and high-temperature coal ash as the medium lead to severe wear and tear on the valves of the pneumatic ash conveying pipeline, and frequent perforation

[0004] During the operation, try to reduce the frequency of ash conveying by prolonging the ash falling time, but the effect is limited, and there are risks such as a large amount of ash that will block the ash conveying pipeline

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