Coal-fired flue gas pretreatment system and method

Abstract

The invention belongs to the field of smoke gas pretreatment, and particularly relates to a coal-fired flue gas pretreatment system and method. The system comprises a flow rate control device, a reaction accommodating device, a tail gas treatment device and a reaction liquid automatic updating system, wherein the flow rate control device is connected onto a flue; the reaction accommodating deviceis connected behind the flow rate control device; the tail gas treatment device is connected behind the reaction accommodating device; the reaction liquid automatic updating system comprises a reaction liquid updating device and a detection control device for controlling the reaction liquid automatic updating; the reaction liquid updating device comprises a fresh reagent storage bottle, a first peristaltic pump, a second peristaltic pump and a waste liquid storage bottle; the detection control device for controlling the reaction liquid for automatic updating comprises a pH detection instrumentwith a pH probe and a control system; the control system controls the first peristaltic pump and the second peristaltic pump to work at the same time through the indication number of the pH detectioninstrument; the automatic updating on the liquid in the reaction accommodating device is realized. By using the coal-fired flue gas pretreatment system, the real-time updating of the reaction liquidcan be realized, so that the whole tail gas treatment device is in an efficient state.

Description

technical field [0001] The invention belongs to the field of flue gas pretreatment, in particular to a coal-fired flue gas pretreatment system and method. Background technique [0002] my country is a big country that mainly produces and consumes coal. The National Bureau of Statistics issued the "2017 Statistical Bulletin on National Economic and Social Development" in 2018, pointing out that my country's raw coal output reached 3.52 billion tons in 2017, an increase of 3.3% over the previous year. %. In a short period of time, the status of coal as the main energy source in China will not change, and the total demand for coal is on the rise. [0003] As a primary energy source, coal is mainly used in combustion in my country. Most of the large-scale power stations in my country are coal-fired power stations, and the coal-fired flue gas contains SO 2 , HCl and other toxic pollutants, these pollutants discharged into the atmosphere will endanger human health and cause seri...

AI Technical Summary

Problems solved by technology

However, the reaction solution will gradually fail during the removal process. If it is not replaced regularly, the flue gas composition will fluctuate greatly, which may affect the subsequent measurement.

And frequent replacement will make the experimental process more cumbersome, affecting the accuracy and stability of the experiment

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