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Powder recovery separator of power station boiler

A power plant boiler and separator technology, which is applied in grain processing and other fields, can solve problems such as the influence of coal mill output, and achieve the effect of novel structure and remarkable energy saving effect

Inactive Publication Date: 2013-03-13
JILIN PROVINCE ELECTRIC POWER RES INST OF JILIN ELECTRIC POWER CO LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a powder return separator for power station boilers to solve the problem that the qualified coal powder existing in the coarse powder separator returns to the coal mill again, which will have a great impact on the output of the coal mill

Method used

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  • Powder recovery separator of power station boiler
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Embodiment Construction

[0008] The upper part of the main body 1 is fixedly connected to the air lock 2, and inside the main body is fixedly connected to an impact cone 3 with a "?"-shaped cross section. The cross section of the impact cone is an equilateral triangle. The body below the impact cone has an air inlet 4 , There is a qualified powder outlet 5 that opens diagonally upward on the body above the impact cone, a partition 6 is fixedly connected to the inner wall of the body below the impact cone, and a discharge port 7 is provided below the body.

[0009] The air and powder mixture coming out of the outlet of the coal mill enters the body from the two air locks set above, so that the coal particles hit the impact cone and then bend back. It is a kind of parabolic motion. The wind entering from the air inlet blows upward, making The qualified powder is led out from the qualified powder outlet; the medium-sized coal powder enters the channel formed by the partition and the body under the action of ...

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Abstract

The invention relates to a powder recovery separator of a power station boiler, belonging to a powder recovery supporting device of the power station boiler. The upper part of the body is fixedly connected with an air locking apparatus, the inner part of the body is fixedly connected with an impact awl of which the cross section is in the shape of an equilateral triangle, the body below the impact awl is provided with an air inlet, the body above the impact awl is provided with a qualified powder outlet opening obliquely upwards, the inner wall of the body below the impact awl is fixedly connected with a baffle, and a dropping port is arranged below the body. The separator is novel in structure, and can be applied to a powder recovery pipe to send qualified coal powder back to primary air flow through winnowing inertia separation and impact and return unqualified coal powder back to a steel ball coal mill. By use of the powder recovery separator, the unit consumption of milling can be reduced by 5-7kWh / t of coal and the energy saving effect is remarkable.

Description

Technical field [0001] The invention belongs to a powder returning matching device of a power station boiler. Background technique [0002] The central storage pulverizing system of the steel ball coal mill of the power plant boiler is mainly composed of the steel ball coal mill, coarse powder separator, cyclone separator, and powder exhaust fan. The energy consumption of the pulverizing system is generally kWh / t coal The calculation is the sum of the unit consumption of coal grinding and the unit consumption of exhaust fan. Its value is about 22~38kwh / t coal (Affected by coal quality, fineness of pulverized coal, equipment characteristics of the pulverizing system, operation level, etc.), for a 200MW unit supporting boiler, it consumes about 100t of coal per hour. If it runs 6000 to 7000 hours per year, it will consume a lot Power. Therefore, it is very important to reduce the energy consumption of the pulverizing system, which mainly includes the optimal ventilation rate, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C23/22
Inventor 张锐衣心亮
Owner JILIN PROVINCE ELECTRIC POWER RES INST OF JILIN ELECTRIC POWER CO LTD
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