Sampling device and sampling method for low concentration total particles in smoke of thermal power plant

A sampling device and particulate matter technology, applied in the field of fixed source flue gas testing, can solve the problems of increasing escapable particulate matter emissions and rapidly increasing proportion, and achieve the effects of reducing errors, suppressing adsorption, and avoiding excessive escape.

Pending Publication Date: 2020-02-04
GUODIAN ENVIRONMENTAL PROTECTION RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, both flue gas desulfurization ultra-low emission transformation and denitrification ultra-low emission transformation may increase the emission of fugitive particulate matter, and the proportion of such particulate matter in the total particulate matter emitted by pollution sources is increasing rapidly

Method used

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  • Sampling device and sampling method for low concentration total particles in smoke of thermal power plant
  • Sampling device and sampling method for low concentration total particles in smoke of thermal power plant
  • Sampling device and sampling method for low concentration total particles in smoke of thermal power plant

Examples

Experimental program
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Effect test

Embodiment 1

[0049] Such as figure 1 As shown, the low-concentration total particulate matter sampling device in the flue gas of a thermal power plant of the present invention includes a sampling device, a condensation device, a secondary filter membrane 15 (PPM filter membrane), a drier 17, a metering device and Sampling pump 20. Pitot tube 3 is also provided in the device.

[0050] The sampling device includes an integrated sampling head 1 and a heating sampling gun 2. The integrated sampling head 1 is composed of a sampling nozzle and a primary filter membrane (FPM filter membrane), the heating sampling gun is lined with a heating sleeve, and the heating sampling gun 2 tubes The heating temperature of the outer lining heating sleeve is controlled at 120°C ± 5°C.

[0051] The condensing device is divided into two stages connected in series. The two-stage condensing devices are equipped with a spiral condensing tube and an impact bottle. The spiral condensing tube is vertically installe...

Embodiment 2

[0059] Such as figure 2 As shown, in this example, optionally, the secondary filter membrane 15 adopts an inverted structure; The inverted filter membrane material of the secondary filter membrane 15 is a PTFE membrane; for standard particles with a diameter of 0.3 μm, the trapping efficiency of the secondary filter should be greater than 99.5%. The primary filter membrane adopts quartz membrane or PTFE membrane; for standard particles with a diameter of 0.3 μm, the collection efficiency of the primary filter should be greater than 99.5%.

Embodiment 3

[0061] Such as image 3 As shown, optional in this example, the enhanced phase change system 10 is designed as shown in the figure. The enhanced phase change system includes a jet mixer 3 and a phase change chamber 4 connected front and back. The jet mixer 3 is provided with two inlets, and the two inlets are respectively It is used to connect steam and connect to the pre-stage condensing device. The jet mixer 3 communicates with the phase change chamber 4, and the phase change chamber 4 is provided with a mixed gas outlet for connecting to the post-stage condensing device.

[0062] The invention mixes the steam and the flue gas by means of jet flow, and the mixed flue gas enters the enhanced phase change system. The length, width and height of the phase change chamber are 600mm*50mm*50mm to ensure that the flue gas stays in the enhanced phase change system for no less than 10 seconds.

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Abstract

The invention provides a sampling device and a sampling method for low concentration total particles in smoke of a thermal power plant, which is used for detecting emission of total particles in smokeafter improvement of ultralow emission or smoke plum treatment and detecting particle removing performance of equipment. The sampling device mainly comprises a sampling device, a condensing device, adehumidifying device, a metering device and a sampling pump that are arranged in sequence in a smoke flowing direction, wherein the sampling device comprises a sampling head and a heating sampling gun, the sampling head comprises a sampling nozzle and a first-level filter membrane, a second-level filter membrane is arranged between the condensing device and the dehumidifying device, the condensing device has a two-level serial structure, the two levels of condensing device are provided with a bath temperature control device separately, a strengthening phase change system is arranged between the two levels of condensing device and is used for adding vapor to smoke entering the latter condensing device, so as to make the smoke wetter and capture more total particles. The device can test total particles reasonably, accurately and comprehensively.

Description

Technical field: [0001] The invention relates to the field of testing flue gas from a fixed source, in particular to a sampling device and a sampling method for low-concentration total particulate matter in flue gas of a thermal power plant based on the source environment. Among them, the low concentration of total particulate matter refers to the concentration of filterable particulate matter at 50mg / m 3 (including 50mg / m 3 ) within the particulate matter. Background technique: [0002] Fine particulate matter is the pollutant that contributes the most to the current regional composite air pollution. To solve regional atmospheric environmental problems, we must first grasp the detailed information on the generation and emission of these particulate matter, especially the information on fine particulate matter emitted by important pollution sources should not be missed. Scientifically monitoring the concentration of particulate matter in the flue gas of thermal power plan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/22G01N1/24G01N5/02G01N15/06
CPCG01N1/2258G01N1/24G01N5/02G01N15/0606G01N15/0618G01N2001/225G01N2001/2282
Inventor 朱法华刘建民李军状王圣易玉萍
Owner GUODIAN ENVIRONMENTAL PROTECTION RES INST CO LTD
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