Auxiliary dedusting device and method of thermal power plant coal conveying system

A technology of coal conveying system and dust removal device, which is applied in the direction of transportation, packaging, loading/unloading, etc., can solve the problems of large dust removal air volume of dust collector, large initial investment capital, and high cost of dust removal equipment, so as to reduce operation and civil construction costs, reduce The effect of initial investment and reduction of civil construction costs

Inactive Publication Date: 2011-01-26
STATE NUCLEAR ELECTRIC POWER PLANNING DESIGN & RES INST CO LTD
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Problems solved by technology

[0007] In order to overcome the defects in the above-mentioned prior art that the dedusting air volume of the dust collector is large, the equipment is bulky, the cost of the dedusting equipment is high, the initial investment is large, the annual cost is high, and it is uneconomical, the implementation of the present invention provides a thermal power plant coal transportation Auxiliary dust removal device for the system

Method used

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  • Auxiliary dedusting device and method of thermal power plant coal conveying system
  • Auxiliary dedusting device and method of thermal power plant coal conveying system
  • Auxiliary dedusting device and method of thermal power plant coal conveying system

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Embodiment 1

[0031] An auxiliary dedusting device for a coal handling system in a thermal power plant, the auxiliary dedusting device is a bypass pipe, and the bypass pipe connects the upper negative pressure area and the lower positive pressure area in the coal falling pipeline of the power plant coal handling system , so that the positive pressure zone at the lower part of the coal falling pipeline is exhausted, and the exhausted gas passes through the bypass pipe to supplement the negative pressure zone at the upper part of the coal falling pipeline.

[0032] Specifically, such as figure 1 As shown, the upper negative pressure zone of the coal falling pipeline is the coal falling pipe on the upper part of the coal crusher 3 in the coal conveying system of the power plant, and the lower positive pressure zone of the coal falling pipeline is the lower part of the coal crusher 3 Coal drop pipe. During specific implementation, holes are opened on the coal drop pipe on the upper part of the...

Embodiment 2

[0047] The embodiment of the present invention also provides a dust removal method for the coal conveying system of a thermal power plant. The method is to perform positive pressure exhaust at the lower part and negative pressure gas supply at the upper part of the coal falling pipeline with pressure difference in the coal conveying system of the power plant.

[0048] Specifically, see figure 1 , the coal drop pipeline with pressure difference is the coal drop pipe at the upper part of the coal crusher and the coal drop pipe at the lower part of the coal crusher in the coal conveying system of the power plant. The coal drop pipe on the upper part of the coal machine is connected with the coal drop pipe on the lower part of the coal crusher.

[0049] Specifically, see figure 2 , the coal-falling pipeline with pressure difference is the coal-falling pipe of the uppermost belt and the coal-falling pipe of the lowermost belt of the transfer station in the coal transportation sys...

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Abstract

The invention discloses auxiliary dedusting device and method of a thermal power plant coal conveying system, belonging to the field of dedusting of thermal power plants. In the invention, an upper negative pressure zone and a lower positive pressure zone in a coal falling pipeline of the power plant coal conveying system are communicated by a bypass pipe, thus the lower positive pressure zone of the coal falling pipeline exhausts gas, and the exhausted gas is supplemented to the upper negative pressure zone of the coal falling pipeline by the bypass pipe. The invention carries out self circulation by utilizing a pressure difference generated in the coal falling engineering of the thermal power plant coal conveying system, can effectively eliminate the local positive pressure of a dust blowing point without external equipment, not only has less initial investment and low annual cost, but also has the advantages of civil engineering cost reduction, simple management, and the like; and proved by tests, the invention can favorably inhibit coal dust and improve the dedusting efficiency. Compared with wet type dedusting, the invention reduces the dedusting water and the emission of coal sewage and achieves the aims of high efficiency, energy saving and environmental protection.

Description

technical field [0001] The invention relates to a coal conveying system of a thermal power plant, in particular to an auxiliary dedusting device and a dedusting method for the coal conveying system of a thermal power plant. Background technique [0002] Coal dust is one of the largest pollution sources in the coal transportation system. It not only destroys the working environment and affects the health of employees, but also hides hidden dangers, threatens normal production, and is not conducive to civilized production. [0003] During a series of work processes such as unloading, distribution, and crushing of coal-fired coal in the power plant coal handling system, it is easy to generate dust in the following places: 1) transfer station. When the coal transported by the belt falls from a high place to the lower belt, the coal will carry a large amount of air into the material guide groove of the lower belt, forming a certain positive pressure, so that part of the coal dus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65G69/18
Inventor 綦建国张天林王阳贲岳
Owner STATE NUCLEAR ELECTRIC POWER PLANNING DESIGN & RES INST CO LTD
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