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Method for burning and processing sludge using generating plant pulverized coal boiler system

A pulverized coal boiler and sludge technology, which is applied in the direction of combustion methods, incinerators, combustion types, etc., can solve the problems of special disposal projects such as difficulty, expensive investment, and long construction period, so as to save investment and cost, and save energy , quick effect

Inactive Publication Date: 2008-07-09
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a new set of sludge drying and incineration equipment must include a complete set of sludge drying heat source, incinerator and exhaust gas purification system. The investment price is relatively expensive and the construction period is relatively long. Due to the shortage of land resources in some cities, It is very difficult to build a new dedicated disposal project

Method used

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  • Method for burning and processing sludge using generating plant pulverized coal boiler system
  • Method for burning and processing sludge using generating plant pulverized coal boiler system

Examples

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specific Embodiment 1

[0028] Taking the sludge briquette fuel incineration project with a treatment capacity of 300 tons / day as an example, the specific implementation of the present invention will be described.

[0029] After transporting 300 tons / day of raw wet sludge (water content 85%) to the power plant, it is piled up in a closed raw sludge storage bin. It is transported to the sludge drying plant through sludge pumps and pipelines. The sludge is dried by 2 sets of spiral rotary sludge dryers, and the wet sludge treatment capacity of each dryer is 150 tons / day. The sludge is dried to become sludge particles with a water content of about 40% and a particle size of about 1mm, which are used as granular fuel. In the step of making the wet sludge into sludge granules, the wet sludge is heated by the low-grade steam after the work of the steam turbine. The dried sludge particles are sent to the dry sludge bin through belts or other conveying devices. The sludge particles in the dry sludge bin a...

specific Embodiment 2

[0034] In this embodiment, the moisture content of the wet sludge is 80%, the moisture content of the treated sludge pellets is 30%, and the particle size is 3 mm. The other implementation steps are the same as in Embodiment 1.

specific Embodiment 3

[0035] In this embodiment, the moisture content of the wet sludge is 75%, the moisture content of the treated sludge pellets is 20%, and the particle size is 5 mm. The other implementation steps are the same as in Embodiment 1.

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Abstract

The invention relates to a harmless disposal technology for resources of solid waste; the purpose is to provide a incineration disposal method for sludge with a powder coal boiler system in a power plant. The invention comprises the following steps: (1) making wet sludge into sludge particles in the moisture content of 20 percent to 40 percent and particle size of 1 to 5mm; (2) putting the sludge particle from the first step into a coal miller with some fuel coal, in order to fulfill milling; (3) sending the milled mixture from the second step into a powder coal boiler in a power plant for incineration disposal. The sludge disposal method utilized in the invention has the advantages of high effective speed and taking sufficient use of thermal value of sludge, so that the volume after the sludge disposal can be reduced more than 90 percent; therefore, the invention has an important application value for resolving the imminent sludge disposal problem for domestic sewage in our country.

Description

technical field [0001] The invention relates to a technology for harmless and resourceful treatment of solid waste, and more specifically, the invention relates to a method for incinerating sludge by using a pulverized coal boiler system of a power station. Background technique [0002] With the acceleration of my country's urbanization process and the strengthening of urban infrastructure construction, the urban sewage treatment rate has gradually increased, accompanied by a large amount of excess sludge. If these sludges cannot be treated in a timely, effective and stable manner, it will bring great hidden dangers to the safety of our regional environment and people's lives. Due to historical reasons, in the process of building sewage treatment plants in China, there has always been the idea of ​​"heavy water and light mud", and the treatment and disposal of sludge has not received due attention. In addition, industrial processes such as papermaking, chemical and pharmace...

Claims

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Application Information

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IPC IPC(8): F23G7/00F23G5/033F23G5/04
Inventor 严建华王飞马增益陆胜勇池涌蒋旭光李晓东金余其杨家林倪明江岑可法
Owner ZHEJIANG UNIV