Coal-fired boiler and control method

A technology for coal-fired boilers and boiler furnaces, which is applied in the direction of combustion methods, controlled combustion, block/powder fuel preparation, etc., and can solve the problems that the out-of-stock after-treatment method is difficult to meet the nitrogen emission standards, etc.

Pending Publication Date: 2020-02-04
GD POWER DEVELOPMENT COMPANY +4
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Problems solved by technology

[0003] The embodiment of the present application provides a coal-fired boiler and a control method, which are used to solve the problem that the existing after-treatment out-of-stock methods are difficult to meet the increasing nitrogen emission standards

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  • Coal-fired boiler and control method

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[0029] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in conjunction with specific embodiments of the present application and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0030] The technical solutions provided by various embodiments of the present application will be described in detail below in conjunction with the accompanying drawings.

[0031] As mentioned above, in the prior art, the NO in the flue gas of coal-fired boilers is reduced by means of after-treatment out of stock x emissions. However, as the country...

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Abstract

The invention discloses a coal-fired boiler and a control method. The coal-fired boiler comprises a coal powder pretreatment device arranged between a coal supply device and a boiler furnace, and thecoal powder pretreatment device comprises an igniter, a coal powder pre-pyrolysis device, a dense phase conveying pipeline and a dilute phase conveying pipeline. An inlet pipeline of the coal powder pre-pyrolysis device is connected with the coal supply device, the dense phase conveying pipeline and the dilute phase conveying pipeline are connected with the boiler furnace separately, the igniter is arranged in the inlet pipeline of the coal powder pre-pyrolysis device, the inlet pipeline of the coal powder pre-pyrolysis device is vertically connected with an outlet pipeline of the coal powderpre-pyrolysis device, and the two ends of the outlet pipeline of the coal powder pre-pyrolysis device are connected with the dense phase conveying pipeline and the dilute phase conveying pipeline respectively. Since the coal-fired boiler comprises the coal powder pretreatment device arranged between the coal supply device and the boiler furnace, fire coal is preheated before entering the boiler furnace for combustion and power generation, and therefore, problems in the prior art can be solved.

Description

technical field [0001] The present application relates to the technical field of coal-fired power generation, in particular to a coal-fired boiler and a control method. Background technique [0002] Due to its advantages of safety, stability and controllability, coal-fired generating units occupy an important position in the proportion of my country's electricity. The coal-fired boilers of the current coal-fired power generation units usually emit a large amount of nitrogen oxides (NO x ), resulting in environmental impacts. In order to reduce NO x emissions, it is often necessary to post-process the flue gas after combustion of coal-fired boilers. However, with the continuous improvement of nitrogen emission standards, it is often difficult to meet the requirements of this after-treatment out-of-stock method. Contents of the invention [0003] The embodiment of the present application provides a coal-fired boiler and a control method, which are used to solve the probl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23C6/00F23K1/00F23L9/00F23N3/00F23N5/10C10B53/04C10L9/08
CPCC10B53/04C10L9/08F23C6/00F23C2201/101F23C2700/063F23K1/00F23L9/00F23N3/00F23N5/10Y02E50/10
Inventor 顾玉春唐宏牛涛朱传兴刘奕宁王羽韩晓菊王思源龚泽儒邹鹏黄军李燕向柏祥王学王晨
Owner GD POWER DEVELOPMENT COMPANY
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