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Waste incineration CFB boiler provided with multi-stage gas and solid separating devices arranged in series

A gas-solid separation and waste incineration technology, applied in the direction of incinerators, combustion methods, combustion types, etc., can solve problems such as damage to health and instability, and achieve the effects of reducing operating costs, saving disposal costs, and low fly ash concentration

Pending Publication Date: 2018-05-08
CHINA WESTERN POWER INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, burning domestic waste in a CFB boiler will form a large amount of fly ash, which will cause chlorine in the flue gas to form highly toxic substances such as dioxins in the temperature range of 200°C to 450°C at the tail of the boiler. They exist in the fly ash, if Allowing the discharge will damage people's health, which is strictly prohibited by national standards; and the fly ash contains a large amount of heavy metal substances, which are in an unstable state and are easily released from the fly ash

Method used

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  • Waste incineration CFB boiler provided with multi-stage gas and solid separating devices arranged in series
  • Waste incineration CFB boiler provided with multi-stage gas and solid separating devices arranged in series

Examples

Experimental program
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Effect test

Embodiment 1

[0033] refer to figure 1As shown, a garbage incineration CFB boiler with multi-stage gas-solid separation devices arranged in series, includes a CFB boiler furnace 1 and a tail flue 5 for burning garbage, and also includes a gas outlet connected in series between the furnace 1 flue gas outlet and the tail flue 5 N-level gas-solid separation device. Furnace 1 is composed of membrane-type water-cooled wall, refractory castables are laid on the surface of water-cooled wall, and the water-cooled wall in front of the furnace is connected with feeding device and coal feeding device; In the state of garbage burning, part of the heat generated by domestic garbage burning in the furnace is absorbed by the water wall. The gas-solid separation device is a high-temperature gas-solid separation device with a working temperature > 500°C to meet the needs of working in a high-temperature flue gas environment and the need to leave the dioxin generation temperature range. There is no need to...

Embodiment 2

[0045] refer to figure 2 As shown, this embodiment is basically the same as Embodiment 1, and the difference is that the gas-solid separation device is a cyclone separator, and the cyclone separator is provided with two stages, that is, the first stage cyclone separator 2 and the second stage cyclone separator 4 .

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PUM

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Abstract

The invention discloses a waste incineration CFB boiler provided with multi-stage gas and solid separating devices arranged in series. The waste incineration CFB boiler comprises a CFB boiler hearth and a tail flue, wherein the CFB boiler hearth is used for incinerating garbage; the waste incineration CFB boiler also comprises N-stage gas and solid separating devices which are connected in seriesbetween a hearth flue gas outlet and the tail flue; N is a positive integer and is larger than or equal to 2; the hearth and the bottoms of the second-stage separator to the N(th)-stage gas and solidseparating device are each provided with a dust outlet; a flue gas inlet of the first-stage solid and gas separating device of the N-stage gas and solid separating devices is connected with the hearthflue gas outlet; a material outlet in the lower portion is connected with the hearth through a material returning device; the flue gas outlet of the N-stage gas and solid separating device is connected with the tail flue. The waste incineration CFB boiler disclosed by the invention is a waste incineration CFB boiler having the remarkable advantages of low dioxin content, low dust emission, low investment and low running cost.

Description

technical field [0001] The invention is suitable for a garbage incineration CFB boiler that uses municipal solid waste as fuel. Background technique [0002] In recent years, with the strengthening of the country's efforts to control pollutants, the fly ash at the tail of domestic waste incineration boilers has been included in the list of hazardous waste. [0003] There are two forms of domestic waste incineration boilers: CFB and grate. In terms of the thoroughness of domestic waste disposal, CFB boilers have incomparable advantages over grate boilers. However, burning domestic waste in a CFB boiler will form a large amount of fly ash, which will cause chlorine in the flue gas to form highly toxic substances such as dioxins in the temperature range of 200°C to 450°C at the tail of the boiler. They exist in the fly ash, if Allowing the discharge will damage people's health, which is strictly prohibited by national standards; and the fly ash contains a large amount of heavy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23J15/02F23G5/14F23G5/44
CPCF23G5/14F23G5/44F23J15/022F23J15/027F23G2202/106F23J2215/60F23J2215/301Y02E20/30
Inventor 蔡文钢
Owner CHINA WESTERN POWER INDAL