Method and system for controlling ash unloading of electrostatic precipitator in machine head to reduce air leakage rate of sintering system

Abstract

The invention discloses a discharging control method for a nose electrical precipitator for reducing the air leakage rate of a sintering system. The method comprises the following steps: acquiring an electric field sequence number of an ash storage bin of the nose electrical precipitator; judging whether the ash storage bin belongs to a first electric field; detecting the actual discharging period of the nose electrical precipitator and the actual discharging time of the first electric field by using the ash storage bin when the ash storage bin belongs to the first electric field; determining a first new discharging time sequence of the nose electrical precipitator; calculating the actual discharging ratio of current post electric field of the ash storage bin to the first electric field when the ash storage bin does not belong to the first electric field; determining a second new discharging time sequence of the nose electrical precipitator; and controlling the nose electrical precipitator to discharge by adopting a gradual discharging mode of a discharge valve in each electric field according to the first new discharging time sequence or the second new discharging time sequence. The invention also provides a discharging control system for the nose electrical precipitator for reducing the air leakage rate of the sintering system. By adopting the method and the system, the air leakage rate of the overall sintering system can be reduced.

Description

technical field [0001] The invention relates to the technical field of dust removal for sintering systems, and more specifically, relates to a control method and system for dust discharge control of an electric precipitator at the head of a sintering system for reducing the air leakage rate of the sintering system. Background technique [0002] The head electrostatic precipitator of the sintering system is an important process and environmental protection equipment in the sintering process. During the sintering production process, the dust-laden flue gas in the large flue can only be discharged into the atmosphere after being treated by the head electrostatic precipitator of the sintering system. The head electrostatic precipitator of a large sintering system is usually a multi-electric field precipitator, that is, it has a multi-electric field (such as three electric fields or four electric fields) structure [0003] Please refer to Figure 1-2 , the illustrated three-elec...

AI Technical Summary

Problems solved by technology

However, because the preset ash unloading sequence of the electrostatic precipitator at the head is usually determined by experience or factory settings, it cannot adapt to the actual dust removal conditions, resulting in the inability to achieve complete material sealing by relying on the preset ash unloading sequence

Since the material level switch is a vulnerable part, it is not reliable to rely on the material level switch to achieve material sealing, and the preset ash unloading sequence cannot adapt to the actual dust removal conditions, so it cannot accurately guide the ash unloading, resulting in the action of the material level switch Frequently, the material level switch is vulnerable to damage and cannot play the guiding role of the material seal. This also makes many users choose to open the ash discharge valve normally or the dust in the ash storage bin must be free of ash when each shift is changed, so as to ensure the sintering production. Continuous and stable operation, which further leads to a large air leakage rate of the sintering system, increases the load of the main exhaust fan of the sintering system, and affects sintering production

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