Energy and water saving system for wet desulphurization system

Abstract

The invention discloses an energy and water saving system for a wet desulphurization system. The energy and water saving system comprises a first-level flue gas cooler, a flue gas input pipeline, a flue gas pretreatment system, a second-level flue gas cooler, a desulphurization tower, a flue mist eliminator, a flue gas condenser, a chimney mist eliminator, a chimney and a steam air heater. Through the energy and water saving system, the supplementary water capacity of the desulphurization tower can be effectively decreased, meanwhile, waste heat of flue gas at an inlet of the chimney is recycled, moreover, the cost is low, and the phenomena of white smoke and stack rain of the chimney can be effectively relieved.

Description

technical field [0001] The invention belongs to the technical field of energy saving and water saving, and relates to an energy saving and water saving system used in a wet desulfurization system. Background technique [0002] As the environmental protection situation has become increasingly serious in recent years, more than 90% of thermal power plants in China have installed wet desulfurization systems. The flue gas temperature at the inlet of wet desulfurization systems is generally controlled at about 90°C. If it continues to decrease, the desulfurization tower will be damaged. Water balance leads to an increase in the amount of sewage discharged from the desulfurization tower, which greatly increases the cost of sewage treatment. However, when the inlet flue gas temperature of the desulfurization tower is controlled at about 90°C, the water replenishment of the desulfurization tower will increase. [0003] The flue gas after wet desulfurization is saturated wet flue gas...

AI Technical Summary

Problems solved by technology

[0004] Many areas in our country are dry and water-short, but the entire unit needs to supplement a large amount of industrial water, which has caused difficulties in the operation of the power plant to a certain extent. It has become a hot topic to condense the water carried in the flue gas after wet desulfurization to supplement the industrial water of the power plant. research topic

In the past, a flue gas cooler was installed in the flue at the chimney inlet, using circulating water to cool the flue gas, and then using an air cooling device to cool the circulating water. This method will cause all the waste heat of the flue gas at the chimney inlet to be discharged into the air, and the entire system Increased water circulation system and air cooling system, higher investment

Images