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Bubbling bed sludge incineration boiler and sludge incineration method

A technology of sludge incineration and bubbling bed, applied in the direction of combustion method, incinerator, combustion type, etc., to achieve full recycling, reduce combustion loss, and improve boiler efficiency

Active Publication Date: 2011-11-09
烟台鑫丰源电站设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a bubbling bed sludge incineration boiler and its sludge incineration method that can fully recycle resources and meet the current needs of solving the sludge treatment problems of sewage treatment plants

Method used

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Embodiment Construction

[0062] Below in conjunction with accompanying drawing, structural principle and working principle of the present invention are specifically described:

[0063] In order to solve the problems of high moisture content in sludge and low calorific value, poor combustion stability, low furnace combustion temperature affecting dioxin decomposition, and highly corrosive acid gas in flue gas, the present invention adopts Unlike conventional fluidized bed boiler designs.

[0064] When the sludge is incinerated after drying, it is composed of very fine particles, which can be completely burned in one flow in the furnace, so the present invention adopts the method of bubbling bed for incineration, and does not use a cyclone separator to form a fly ash circulation A method of performing multiple burns.

[0065] The water content of the sludge sent by the sewage treatment plant is about 90%, and the calorific value is very low, about 1200kj / kg. Sludge must be dry to be ignited, so heat i...

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Abstract

The invention relates to a bubbling bed sludge incineration boiler and a sludge incineration method. The bubbling bed sludge incineration boiler comprises a steel framework, and a sludge incineration hearth, an air preheater, an evaporator, a feed water preheater, a primary air chamber and a boiler barrel which are arranged on the steel framework, wherein the primary air chamber is connected withthe lower port of the sludge incineration hearth; the sludge incineration hearth is a heat-insulating hearth, so that heat generated by sludge incineration is completely used for drying sludge; the air preheater is communicated with a flue gas outlet and a secondary air inlet of the hearth and the primary air chamber through a pipeline respectively, and is used for generating high-temperature airto supplement heat required by drying the sludge and providing oxygen required by ignition and preliminary combustion; the evaporator is connected with the air preheater; the feed water preheater is connected with the evaporator; and the evaporator and the feed water preheater are connected with the boiler barrel respectively to generate saturated steam for drying the sludge.

Description

technical field [0001] The invention relates to a sludge treatment equipment and method, in particular to a bubbling bed sludge incineration boiler and a sludge incineration method which uses a bubbling bed combustion method to incinerate sludge. Background technique [0002] With the acceleration of urbanization and the improvement of people's living standards, the treatment of urban sewage has become an important part of environmental protection, and sewage treatment plants have been built in various cities. At present, the amount of sludge (dry weight) discharged by urban sewage treatment plants in my country is about 1.3 million tons per year, and the annual growth rate is greater than 10%. If all urban sewage is treated, the amount of sludge (dry weight) will be 8.4 million tons, accounting for 3.2% of the total solid waste in my country. Sludge produced by sewage treatment plants is highly polluting waste, containing pathogens, excessive salt, nitrogen and phosphorus,...

Claims

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Application Information

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IPC IPC(8): F23G7/00
Inventor 董凯张天飚
Owner 烟台鑫丰源电站设备有限公司
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