Wet desulfurization and dust removal system, and automatic flushing, water distribution and water replenishment control method thereof

Abstract

The invention provides a wet desulfurization and dust removal system, and an automatic flushing, water distribution and water replenishment control method thereof. The system comprises a pre-demister,a dust-removing water tank, a dust-removing water pump, a dust-removing flushing water pump and a deep dust-removing device. The method comprises the following steps: setting flushing time and liquidlevel parameters in a program of a control center at first; regularly and automatically starting a pre-demister flushing program to realize flushing of the pre-demister and water replenishment of anabsorption tower; after current flushing is finished, re-counting timing time and waiting for the starting of next flushing; and when the water level of the dust-removing water tank is smaller than alinkage limit, performing linkage inputting, and starting a multi-stage demister flushing program to realize multi-stage demister flushing, intermittent water distribution of the DUC dust-removing device and maintenance of the liquid level balance of the dust-removing water tank. The method is reasonable in design, and only needs to accurately adjust parameters such as flushing time and liquid level so as to realize the multiple effects of demister flushing, water replenishment of the absorption tower, the liquid level balance of the dust-removing water tank, replacement of a solution in the dust-removing water tank, water distribution of the dust-removing device and high-efficiency dust removal through automatic operation of the programs; and the method meets operation requirements underfull high-and-low-load working conditions.

Description

technical field [0001] The invention relates to the technical field of desulfurization towers, in particular to a wet desulfurization and dust removal system and its automatic flushing, water distribution and water replenishment control methods. Background technique [0002] At present, the wet ultra-clean desulfurization deep dust removal (DUC) system is gradually popularized and applied as a set of stable, low solid content circulating washing water distribution system. It uses liquid water to absorb fine particles, and the water quality in the dust removal tank directly affects For the removal effect of fine particles, the better the water quality (mainly refers to the solid content), the better the absorption effect. However, the single pursuit of water quality will easily lead to increased water consumption of the system, difficulty in controlling the water balance of the system, and even lead to system paralysis in severe cases. Therefore, there is an urgent need to d...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a wet desulfurization and dust removal system and its automatic flushing, water distribution and water replenishment control methods to solve the problems of increased system water consumption, difficult control of system water balance, and easy system scaling and blockage in the prior art. Severe technical problems that even lead to system paralysis

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