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Portable coal powder sampler

A sampling device, portable technology, applied in the field of portable pulverized coal sampling device, can solve the problems of inability to achieve constant velocity sampling, inability to accurately realize P, etc., and achieve the effect of convenient use

Inactive Publication Date: 2010-08-18
NINGXIA ELECTRIC POWER RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the structure of the above-mentioned device, because the constant velocity sampling is realized by manually adjusting the sampling pressure regulating valve through the degree of the pressure gauge, it is impossible to accurately realize the P 1 -P 2 =0, the purpose of constant velocity sampling cannot be achieved

Method used

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  • Portable coal powder sampler
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  • Portable coal powder sampler

Examples

Experimental program
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Effect test

Embodiment Construction

[0010] Such as figure 1 , 2 As shown in the portable pulverized coal sampling device, the tubular sampling gun 9 is equipped with a pressure measuring tube 9-3 and a sampling tube 9-2, the air inlet 9-1 at the right end of the sampling tube is opposite to the flow direction of the sampling air flow, and the left end of the sampling tube passes through The pipeline 6 is connected with the air inlet of the cyclone separation device 5 . In order to improve the separation accuracy, the cyclone separation device is composed of two cyclone separators connected in series. The negative pressure generator uses the existing device. Its working principle is to use the nozzle to spray compressed air at high speed, and form a jet at the outlet of the nozzle to generate entrainment flow. Under the action of entrainment, the air around the outlet of the nozzle is continuously drawn Suction away, make the pressure of the negative pressure port drop below the atmospheric pressure, and form a...

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Abstract

The invention relates to a measuring device, in particular to a portable coal powder sampler which comprises a negative pressure generator, a sampling gun, a cyclone separator connected with the sampling gun through the pipeline and a sample storage tank mounted on the cyclone separator. The portable coal powder sampler is characterized in that a piezometer tube and a sampling tube are mounted in the tubular sampling gun, wherein the sampling tube is connected with the air intake of the cyclone separator through the pipeline, the air outlet of the cyclone separator is connected with the negative pressure opening of the negative pressure generator, the air intake of the negative pressure generator is connected with the compressed air through an electrical control valve, the exhaust inlet of the negative pressure generator is communicated with the tubular sampling gun through the pipeline, both the piezometer tube and the sampling tube are provided with a pressure sensor and a blowback pipe, the blockback pipes mounted on the piezometer tube and the sampling tube are communicated with the air source of the compressed air through a valve, and the two pressure sensors mounted on the piezometer tube and the sampling tube and the electric control valve are connected electrically with a pressure control device. The invention can achieve the purpose of sampling accurately in constant speed.

Description

technical field [0001] The patent of the present invention relates to a measuring device, especially a portable pulverized coal sampling device. Background technique [0002] For large coal-fired boilers, the fineness of pulverized coal is an important parameter to measure the pulverization system of the boiler. If the fineness of pulverized coal seriously exceeds the standard, it will bring many problems to production, such as difficulty in igniting pulverized coal, unstable flame combustion, Pulverized coal is difficult to burn out, which leads to problems such as high carbon content in fly ash and failure to carry the load. Therefore, it is necessary to accurately measure the fineness of pulverized coal, so as to control and adjust the combustion system purposefully and in a planned way, so as to realize the best operation mode of the boiler. The pulverized coal sampling of the direct-blown pulverizing system must be sampled from the air-powder mixture in the primary air...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/14
Inventor 刘京燕孙云马国伟宋军
Owner NINGXIA ELECTRIC POWER RES INST
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