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Pulverized coal sampling exhaust gas recycling device

A recovery device and pulverized coal technology, which is applied in the exhaust gas recovery device for pulverized coal sampling and recovery of exhaust gas in the rapid sampling system, and can solve problems such as environmental pollution and harsh working environment

Inactive Publication Date: 2011-07-20
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since both the compressed air pipeline and the pulverized coal pipeline are under positive pressure, after the extracted pulverized coal flow is separated, the exhaust gas will be discharged to the air. As far as the current technology is concerned, the efficiency of the cyclone separator cannot reach 100%, that is to say, the exhaust gas Containing coal powder in the air, it will cause environmental pollution when discharged into the air, and the working environment during on-site sampling is relatively harsh

Method used

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  • Pulverized coal sampling exhaust gas recycling device
  • Pulverized coal sampling exhaust gas recycling device
  • Pulverized coal sampling exhaust gas recycling device

Examples

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Embodiment Construction

[0020] figure 1 It is a schematic diagram of a flat-head constant-velocity pulverized coal sampling system. The first-stage separator 5 is connected with the sampling gun 1 through threads, and the sampling tubes and pressure nozzles 2 and 3 of the sampling gun 1 are connected with the micromanometer 4; the compressed air source 14 and the shut-off valve 13 is connected to one end of the aspirator 10 through the compressed air introduction pipe 11, and the other end of the aspirator 10 is connected to the sampler discharge pipe 16; Connect with the outlet pipe 7 of the secondary separator;

[0021] The invention relates to a exhaust gas recovery device for a pulverized coal sampler, which is particularly suitable for recovery of exhaust gas in a pulverized coal flow constant-velocity sampling system of a power plant boiler direct-blown pulverization system, and aims at protecting the environment and improving on-site working conditions.

[0022] refer to figure 2 , the exha...

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Abstract

The invention relates to a pulverized coal sampling exhaust gas recycling device which belongs to a gas-solid two-phase flow constant-speed sampling system and is particularly suitable for recycling pulverized coal gas flow constant-speed sampling system exhaust gas of a power station boiler direct-firing pulverizing system. One end of a rapid joint is connected with a stop valve through a sampler exhaust pipe; an emptying bypass pipeline is arranged in the sampler exhaust pipe; and the other end of the rapid joint is sequentially connected with a check valve and a boiler hearth negative pressure region through outlet pipes. The device is simple and feasible, and has the advantages of low sampling workload, favorable environment friendliness and wide application prospect.

Description

technical field [0001] The invention belongs to a gas-solid two-phase flow constant-velocity sampling system, and relates to a coal powder sampling exhaust gas recovery device, which is particularly suitable for recovery of exhaust gas in a power plant boiler coal powder flow constant-velocity sampling system. Background technique [0002] At present, all large-capacity boilers adopt the direct-blowing pulverizing system, which has the advantages of better economy to adapt to the change of boiler load, and the system is simple, and the investment and operation costs are relatively low. However, the pulverized coal sampling of the direct-blowing pulverizing system more difficult. [0003] From the point of view of combustion, the finer the pulverized coal, the better. However, as the fineness of the pulverized coal increases, the power consumption of the pulverizer will increase at the same time. Combustion is sufficient, but also to reduce auxiliary power consumption. Ther...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/10
Inventor 吴东垠姚季刘珊伯朱良松
Owner XI AN JIAOTONG UNIV
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