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Method for controlling dioxin pollution during treating waste

A technology of waste and dioxin, applied in the field of controlling dioxin-like pollution

Inactive Publication Date: 2010-02-10
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, waste incineration is an important pollution source of dioxins. If the high-temperature waste incineration process is not well controlled, high concentrations of dioxins will be emitted.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Calcium-based retarder (calcium oxide) is mixed in waste incineration material, and the addition amount of calcium-based retarder is 0.01% of waste weight, and the material after mixing is incinerated by conventional method in fluidized bed, adds The calcium-based blocker can inhibit the synthesis of dioxins in the waste incineration process, reducing the original synthesis of dioxins by more than 50%. At the same time, the calcium-based blocker can also partially desulfurize, dechlorinate, and remove Acid gases such as HCl.

Embodiment 2

[0013] The addition of calcium-based blocker (calcium oxide and calcium carbonate, its weight ratio is 1: 1) is 0.5% of waste weight, all the other are with embodiment 1. The original synthesis of dioxins was reduced by more than 60%.

Embodiment 3

[0015] The addition of calcium-based blocker (calcium hydroxide and calcium carbonate, its weight ratio is 3: 1) is 5% of waste weight, and all the other are with embodiment 1. The original synthesis of dioxins was reduced by more than 50%.

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PUM

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Abstract

The invention discloses a method for controlling dioxin pollution during treating waste. Calcium-based retarder and the waste are mixed and then burned together; the adding amount of the calcium-basedretarder is 0.01 to 5 percent of the weight of the waste; and the calcium-based retarder is one or a mixture of several of calcium oxide, calcium hydroxide and calcium carbonate according to a randomproportion. The calcium-based retarder and a decomposed product thereof are reacted with dioxin precursor and the like in a furnace to retard the generation of dioxins so as to reduce the discharge of the dioxins along with tail gas and relieve the load of subsequent treatment for the dioxin tail gas and fly ash. Meanwhile, the calcium-based retarder also has the cooperative control effect of partially removing sulfur, chlorine and acid, and reduces the corrosion of smoke on a subsequent waste heat boiler part.

Description

technical field [0001] The invention relates to the application of a calcium-based retarder pollution control, in particular to a method for controlling dioxin pollution by using the calcium-based retarder when burning and treating waste. Background technique [0002] The annual output of urban solid waste in my country has exceeded 160 million tons, and the construction of municipal solid waste treatment facilities is progressing rapidly, especially the construction of incineration treatment facilities is showing an upward trend. The "Tenth Five-Year Plan" period is a stage of rapid development of solid waste incineration in my country. More than 60 solid waste incineration plants have been built nationwide, mainly including two different furnace types: grate type incinerator and circulating fluidized bed incinerator. In the incineration plants that have been built and are under construction, the ratio of the grate type incinerator to the circulating fluidized bed incinerat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23G5/02F23G5/30A62D3/00
Inventor 郑明辉刘文彬李素梅高丽荣张兵
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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