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Pulverized coal boiler and grate furnace combined waste incineration power generation system and method

A pulverized coal boiler and waste incineration technology is applied in the field of waste incineration power generation system to achieve the effects of reducing primary air rate, improving utilization rate and reducing flue gas treatment cost

Pending Publication Date: 2021-11-09
XIAN THERMAL POWER RES INST CO LTD
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  • Description
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Problems solved by technology

[0004] Aiming at the problem of waste incineration and utilization in the prior art, the present invention provides a waste incineration power generation system and method for the combination of pulverized coal boiler and grate furnace

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  • Pulverized coal boiler and grate furnace combined waste incineration power generation system and method

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Embodiment Construction

[0030] The present invention will be further described in detail below in conjunction with specific embodiments, which are to explain rather than limit the present invention.

[0031] The present invention is a waste incineration power generation system combined with a pulverized coal boiler and a grate furnace, such as figure 1 As shown, it includes a grate furnace 3, a pulverized coal boiler 16 and a steam turbine 29; the tail flue 7 of the grate furnace 3 is provided with a main pipe, and the main pipe is connected to the burn-off air nozzle 18 in the furnace of the pulverized coal boiler 16 above;

[0032] The pulverized coal boiler 16 includes a front-end superheater arranged above the furnace, and a rear-end superheater arranged in the horizontal flue, wherein the flue gas of the pulverized-coal boiler 16 first passes through the front-end superheater to release heat, and then passes through the rear-end superheater to release heat. Therefore, the temperature of the fro...

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Abstract

The invention discloses a pulverized coal boiler and grate furnace combined waste incineration power generation system and method. A grate furnace and a pulverized coal boiler are combined for use, and a flue of the grate furnace is connected to the position above an over fire air nozzle of the pulverized coal boiler, so that harmful substances in flue gas of the grate furnace can be decomposed and inhibited through the internal temperature and sulfur dioxide of the pulverized coal boiler; meanwhile, steam pipelines of a high-temperature superheater of the grate furnace and steam pipelines of a middle-end superheater and a rear-end superheater of the pulverized coal boiler are converged into an intermediate-pressure cylinder of a steam turbine to do work, a front-section superheater of the pulverized coal boiler enters a high-pressure cylinder of the steam turbine to do work, and energy generated in the garbage combustion process and the pulverized coal combustion process is reasonably utilized, so that the energy utilization rate is increased; and finally, mixed flue gas in the grate furnace and the pulverized coal boiler is purified through flue gas treatment equipment at the tail of the pulverized coal boiler, so that net emission of the flue gas is realized, and the flue gas treatment cost is reduced.

Description

technical field [0001] The invention belongs to the field of coal-fired power generation and solid waste disposal, and in particular relates to a waste incineration power generation system and method for combined use of a pulverized coal boiler and a grate furnace. Background technique [0002] With the continuous development and progress of society, the volume of garbage removal per capita is increasing year by year. The incineration method of waste disposal has the advantages of fast processing speed and good volume reduction, and the growth rate is relatively fast. Traditional waste incineration power plants mostly use grate furnaces to dispose of waste, but the combustion temperature is low (about 800°C), and highly toxic dioxins are likely to be produced. Moreover, these newly built grate furnaces have NIMBY effect, making site selection difficult. Large investment; traditional power plant pulverized coal boilers have the advantages of high furnace temperature (1300-15...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23G7/00F23G5/00F23G5/44F23G5/46F23J15/06F23J15/02F23K1/00F23K3/02F22B1/22F22D1/02F01D15/10F01K11/02F01K13/00
CPCF23G7/00F23G5/00F23G5/44F23G5/46F23J15/06F23J15/02F23J15/022F23K1/00F23K3/02F22B1/22F22D1/02F01D15/10F01K11/02F01K13/00Y02E20/12
Inventor 刘笑房凡贾兆鹏马翔
Owner XIAN THERMAL POWER RES INST CO LTD
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