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A method for removing dioxins in waste incinerator flue gas

A waste incinerator and dioxin technology, which is applied in the combustion method, incinerator, combustion type, etc., can solve the problem of dioxin emission that cannot be completely solved by waste incineration.

Inactive Publication Date: 2011-12-28
福建省丰泉环保控股有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a method for removing dioxins in the flue gas of waste incinerators, which is simple, practical, economical and effective, in view of the fact that the existing technology cannot completely solve the problem of dioxin emissions from waste incineration

Method used

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  • A method for removing dioxins in waste incinerator flue gas
  • A method for removing dioxins in waste incinerator flue gas

Examples

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Embodiment 1

[0021] A method for removing dioxins from waste incinerator flue gas, which combines an incineration process for removing dioxins from waste incinerator flue gas and a method of spraying inhibitors into the incinerator furnace, wherein , the incineration process used to remove dioxins in the flue gas of the garbage incinerator is as follows: the garbage is placed on the grate at the bottom of the furnace of the garbage incinerator and burned, and the incineration air with an excess air coefficient of 2.2 is supplied from the bottom of the grate. The secondary combustion area above the row is injected with secondary gas (generally referring to natural gas or coal gas) and secondary excess combustion air with an excess air coefficient of 1.05. By controlling the amount of secondary fuel and secondary combustion air, the nozzle area The temperature in the secondary combustion zone is at 1100°C; while implementing the aforementioned incineration process, inject inhibitor powder int...

Embodiment 2～ Embodiment 6

[0023] Embodiment 2 to embodiment 6 take embodiment 1 as a reference, and the dioxin discharge concentration of its various process parameter changes and incinerator flue gas discharge is compared with embodiment 1 in tabular form and lists as follows:

[0024]

[0025]

[0026] The dioxin emission concentration of the incinerator flue gas discharge of embodiment 1~6 is all less than 0.5ngTEQ / Nm 3 , are in line with my country's latest dioxin emission standards. Therefore, it can be proved that the method for removing dioxins in the flue gas of garbage incinerators of the present invention is very effective in decomposing dioxins produced during garbage incineration and inhibiting the formation of dioxins.

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Abstract

The invention relates to a garbage incineration treatment technology, in particular to a method for removing dioxin from fume of a garbage incinerator, wherein an incineration process for removing the dioxin from the fume of the garbage incinerator and a method for injecting an inhibitor into the garbage incinerator are combined; the incineration process for removing the dioxin from the fume of the garbage incinerator comprises the following steps of: placing garbage on a fire grate at the bottom of a hearth of the garbage incinerator to burn, feeding excess incineration gas from the bottom of the fire grate, and injecting secondary fuel and secondary excess incineration gas into a secondary combustion region above the fire grate; and while implementing the incineration process, injectingan inhibitor powder into the secondary combustion region in the garbage incinerator, wherein the secondary fuel is fuel gas or fuel oil, and the inhibitor in the inhibitor powder is any one or more of calcium oxide, magnesium oxide, magnesium carbonate, lime stone or dolomite. Through the method disclosed by the invention, the formation of the dioxin in the garbage incinerator can be effectively controlled, and the wide application prospect is provided.

Description

technical field [0001] The invention relates to waste incineration treatment technology, in particular to a method for removing dioxin in a waste incinerator. Background technique [0002] The waste incineration treatment method has the advantages of obvious reduction, short cycle, harmlessness and outstanding resource utilization, and has received a lot of attention in waste treatment methods in recent years. However, a small amount of chlorine sources are often mixed in the garbage. When the incineration treatment conditions are not appropriate, the incineration flue gas will emit dioxins, which may cause secondary pollution of the atmosphere. Dioxins are solid under standard conditions, with a melting point of 303-305°C. Dioxins are extremely difficult to dissolve in water but easily dissolved in fat, so they are easy to accumulate in the body and difficult to excrete. Dioxins have teratogenic and harmful effects on the human body. carcinogenic effect. [0003] The form...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23G5/14F23G5/00
Inventor 陈泽峰姚艳卢川鑫林敏玲沈伯雄杨建森
Owner 福建省丰泉环保控股有限公司
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