Multipoint high-temperature sample gas collecting system capable of working reliably

A technology for collecting system and sample gas, applied in the field of high-temperature flue gas multi-point sampling devices in thermal power plants, can solve the problems of inability to provide uninterrupted operation, intermittent data collection, inability to achieve high-temperature extraction, etc., to avoid smoke and dust clogging, Improved work reliability, improved stability and reliability

Inactive Publication Date: 2017-11-21
河北钽泰科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, most of the flue gas samplers used to monitor flue gas use vacuum pumps or fans to extract high-temperature corrosive flue gas, which cannot provide uninterrupted operation, data collection is intermittent, and work reliability is poor
The whole set of sampling system cannot achieve high temperature extraction, the sample gas condenses and liquefies during the extraction process, corroding the pipeline; dust agglomerates with water, blocking the pipeline

Method used

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  • Multipoint high-temperature sample gas collecting system capable of working reliably
  • Multipoint high-temperature sample gas collecting system capable of working reliably
  • Multipoint high-temperature sample gas collecting system capable of working reliably

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0058] A.1 Front sampling probe rod

[0059] The front-end sampling probe is mainly composed of a sampling probe, a pre-embedded DN65 flange assembly (large flange, a large flange cover), and a conversion joint between the probe and the probe. The main implementation method is to weld the DN65 pre-embedded flange to the flue in advance, and the welding angle needs to be at an angle of 89° with the flue wall, and prepare the connection between the probe rod and the outer threaded joint of the ferrule. Such as Figure 14 shown.

[0060] A.2 filter box

[0061] The filter box 10 is mainly composed of a sampling gas path, a backflushing gas path, a heating circuit and its control part (temperature controller 34), which is used to connect the front-end sampling probe rod and the heating pipeline, and its main function is to filter the flue gas in the flue Dust, to prevent the back-end pipeline from clogging; the collected sample gas is heated at a constant temperature of 150°C t...

specific Embodiment approach

[0067] 1. Place the control cabinet on the measuring point platform, and connect the installed probe rod with the sampling gas path of the filter box, the blowback gas path and the control cabinet through the heating pipeline;

[0068] 2. Pass the compressed air source into the buffer tank on the right, and open the metering valve at the front end of the vacuum generator to adjust the intake air volume;

[0069] 3. Connect the main power supply to the main switch in the control cabinet, and turn on each sub-control circuit breaker;

[0070] 4. Debug the temperature control instrument on the control panel of layer A of the control cabinet, and adjust the temperature of each heating pipeline to be between 120-160°C;

[0071] 5. Adjust the flow of each air intake path to ensure that the flow of each path is basically balanced;

[0072] 6. After heating and pumping for 15 minutes to 1 hour, connect the air outlet on the right side of the cabinet to the analyzer and observe the da...

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Abstract

The invention relates to a multipoint high-temperature sample gas collecting system capable of working reliably. The system comprises a sampling probe rod, a fixing device, a filtering system, a heating pipeline and a sample gas mixing system, wherein the fixing device comprises a big flange, a big flange cover, a small flange cover and a small flange; the big flange is pre-buried on a side wall of a flue; the sampling probe rod is welded on the big flange cover, is fixed on the big flange through the big flange cover and extends into the flue; the probe rod comprises an inner rod; a spring heating wire is sleeved on an outer wall of the inner rod; an insulating protecting cover is arranged on the exterior of the spring heating wire; the filtering system is arranged between the big flange cover and the small flange; the filtering system is connected with the sample gas mixing system through the heating pipeline; the sample gas mixing system is connected with a detecting system through the heating pipeline; the sample gas mixing system is used for collecting the sample gas in the manner of matching with the compressed air through a venturi vacuum pumping system and a mixing device is used for mixing each path of sample gas and then exhausting from a sample outlet. The multipoint high-temperature sample gas collecting system has the advantages of stability and reliability in working, long service life, low cost, high temperature resistance and small volume.

Description

technical field [0001] The invention belongs to the field of flue gas sampling and analysis systems, in particular to an energy-saving and reliable thermal power plant high-temperature flue gas multi-point sampling device. Background technique [0002] When a thermal power plant generates electricity, it needs to carry out combustion operations; the high-temperature flue gas generated by the combustion enters the chimney through the flue, and finally is discharged into the atmosphere from the chimney. [0003] The Continuous Monitoring and Sampling System for Flue Gas Emissions (CMES for short) is widely used in the power industry, chemical and petroleum refining industries. Emissions SO due to chemical reactions 2 , NO x , is the main factor causing acid rain, which is very harmful to human health, livestock and plants. With the strengthening of environmental protection, flue gas dust removal, desulfurization, and denitrification technologies have attracted more and more ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/24
CPCG01N1/2205G01N1/2258G01N1/24G01N2001/2261G01N2001/248
Inventor 叶挺志张娟黄英剑
Owner 河北钽泰科技有限公司
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