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Exhaust gas powder feeding device and exhaust gas powder feeding system for coal-fired power plants

A technology of air supply and powder supply air, which is applied in the field of thermal power generation, can solve the problems of easy deposition of coal powder, etc., and achieve the effect of ideal safety, large air flow rate and uniform speed

Active Publication Date: 2016-08-17
YANTAI LONGYUAN POWER TECH
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Problems solved by technology

[0008] The purpose of the present invention is to propose an exhaust gas powder feeding device and an exhaust gas powder feeding system for a coal-fired power station equipped with the exhaust gas powder feeding device, which solves the problem of easy deposition of coal powder in the exhaust gas powder feeding process of the prior art technical problem

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Embodiment Construction

[0036] Below you can refer to the accompanying drawings Figure 1 ~ Figure 3 And the content of the text to understand the content of the present invention and the differences between the present invention and the prior art. The technical solution (including the preferred technical solution) of the present invention will be further described in detail below by way of the accompanying drawings and listing some optional embodiments of the present invention. It should be noted that: any technical feature and any technical solution in this embodiment are one or more of a variety of optional technical features or optional technical solutions. Citing all the alternative technical features and alternative technical solutions of the present invention, it is not convenient for the implementation of each technical feature to emphasize that it is one of the optional multiple implementation modes, so those skilled in the art should know that: Replace any technical means provided by the p...

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Abstract

The invention discloses a tertiary-air powder feeding device and a tertiary-air feeding system applied to a coal-fired power plant, relates to the technical field of thermal power generation and solves the technical problem of the prior art that coal powder is prone to deposition during tertiary air powder feeding. The tertiary-air powder feeding device comprises an air box, a powder exhaust pipe, at least one powder feeding air duct and at least one tertiary air pipeline. The lower pipeline wall of each tertiary air pipeline comprises a first segment communicated with the air box and a second segment connected with the first segment. In a direction from the air box to an inlet of each tertiary air pipeline, the first segment gradually rises, and the second segment gradually descends. The tertiary-air powder feeding system comprises the tertiary-air powder feeding device provided in any technical schemes. In this way, coal powder deposition is avoided during the tertiary air powder feeding, and safety is improved during the tertiary air powder feeding.

Description

technical field [0001] The invention relates to the technical field of thermal power generation, in particular to an exhaust gas powder feeding device and an exhaust gas powder feeding system for coal-fired power stations provided with the exhaust gas powder feeding device. Background technique [0002] The exhaust gas powder delivery system is mainly used to deliver exhaust gas to the burner of the boiler in the coal-fired power station. [0003] The pulverized coal pulverized by the coal mill is first stored in the pulverized coal bunker, and the pulverized coal used for boiler combustion is taken from the pulverized coal bunker through the pulverizer. This pulverizing system is called an intermediate storage bin pulverizing system. The desiccant separated by the fine powder separator is called "depleted gas". The desiccant contains a small amount of coal powder (10%-15%), more moisture, and has a lower temperature; in order to protect the environment and save energy, the ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23K3/02
Inventor 杨天亮蔡兴飞张玉斌牛天文褚晓亮
Owner YANTAI LONGYUAN POWER TECH
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