Coal-fired power plant sludge drying and blending combustion system

Abstract

The invention discloses a coal-fired power plant sludge drying and blending combustion system. The coal-fired power plant sludge drying and blending combustion system comprises a sludge carbonizing system, a carbonized sludge storage tank, a feeding pump, a dewatering system, a power station boiler and a wastewater recycling system; an outlet of the sludge carbonizing system communicates with an inlet of the carbonized sludge storage tank, an outlet of the carbonized sludge storage tank communicates with an inlet of the dewatering system through the feeding pump, a dried sludge outlet of the dewatering system communicates with a coal feeding belt of the power station boiler, and a wastewater outlet of the dewatering system communicates with the wastewater recycling system; an air exhaust and extraction port, a dosing port and a radar level gauge used for detecting the liquid level of sludge in the carbonized sludge storage tank are arranged at the top of the carbonized sludge storage tank; and a stirrer used for stirring the sludge in the carbonized sludge storage tank is arranged on the side surface of the carbonized sludge storage tank. The coal-fired power plant sludge drying and blending combustion system can solve problem of influence of sediment and carbonized sludge malodor on the environment in the storage, conveying and dewatering processes of the carbonized sludge.

Description

technical field [0001] The invention belongs to the field of coal-fired power plant sludge blending and pollutant treatment, and relates to a coal-fired power plant sludge drying and blending system. Background technique [0002] The disposal of sludge produced by urban sewage treatment plants has always been a problem that plagues the development of modern cities. Conventional sludge disposal methods include building waste incinerators, sludge aerobic composting, drying granulation and sanitary landfill, etc. However, with the acceleration of urbanization in my country, there is a huge gap in sludge disposal. In order to solve the social problems of increasing sludge volume and improve the comprehensive benefits of power plants, coal-fired power plants are gradually carrying out sludge blending attempts. [0003] Coal-fired power plants co-combust sludge, and the sludge with a water content as high as 60% to 80% is generally required to be dried and pretreated. There are ...

AI Technical Summary

Problems solved by technology

There are a variety of process options for sludge drying, among which sludge carbonization process is one of the options, but there is no precedent for formal operation in coal-fired power plants

The intermediate product of sludge carbonization in the production process is a mixture of carbonized sludge and water, which needs to be stored, transported and dehydrated. Carbonized sludge has the characteristics of strong odor and easy stratification, and it is prone to precipitation during storage and transportation. If it is not handled properly or the odor is discharged, it will cause secondary pollution to the environment, which will seriously affect the health and normal life of power plant workers

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