Device and method for sampling hydrogen chloride in flue gas of coal-fired unit

A technology for coal-fired units and sampling devices, applied in sampling devices, measuring devices, sampling and other directions, can solve problems such as the influence of the accuracy of results, and achieve the effects of reducing positive interference, reducing sampling loss, and prolonging service life

Pending Publication Date: 2020-10-09
ZHEJIANG ZHENENG TECHN RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technology still has some defects and can be improved. It is necessary to further avoid the influence of interference items on the accuracy of the results during the sampling process.

Method used

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  • Device and method for sampling hydrogen chloride in flue gas of coal-fired unit
  • Device and method for sampling hydrogen chloride in flue gas of coal-fired unit
  • Device and method for sampling hydrogen chloride in flue gas of coal-fired unit

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as figure 1 As shown, Embodiment 1 of the present application provides a hydrogen chloride sampling device in the flue gas of a coal-fired unit, including a sampling cover 1, a sampling gun rod 2, a locking valve 3, a depth positioning ring 4, a heating box 5, a membrane filter 6, a silica gel Pipe 7, front three-way valve 8 of sampling pump, chemical titration sampling pump 9, glass absorption bottle 10, ice bath box 11, front three-way valve 12, temperature controller 13 and inner tube 14 of sampling gun. According to the sampling smoke flow path, the sampling cover 1 is threadedly connected with the sampling gun rod 2, and the sampling gun rod 2 is provided with a sampling gun inner tube 14, and the sampling cover 1 is used as a fixture of the sampling gun inner tube 14 head; the depth positioning ring 4 can be placed on the The sampling gun rod 2 slides to a specific position, and the depth positioning ring 4 is fixed by the locking valve 3; the rear part of t...

Embodiment 2

[0044] Embodiment 2 of the present application provides a sampling method of a hydrogen chloride sampling device in flue gas of a coal-fired unit, comprising the following steps:

[0045] S1. Hydrogen chloride sampling method A self-made hydrogen chloride sampling device is used to implement the sampling process at a specific section of the flue of the coal-fired unit. first as figure 1 Connect the sampling device as shown, the outlet of the front three-way valve 12 is connected to the glass absorption bottle 10 (50ml deionized water), the glass absorption bottle 10 (50ml 0.10mol / L sodium hydroxide solution), and the first three sampling pumps in sequence with the silicone tube 7 at the outlet of the three-way valve 12. Through valve 8, chemical titration sampling pump 9, and the electric heating heating cable is energized and heated outside the silicone tube 7. Two glass absorption bottles 10 are placed in the ice bath box 11 grooves and fixed.

[0046] S2. Start the chemi...

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Abstract

The invention relates to a device for sampling hydrogen chloride in the flue gas of a coal-fired unit. The device comprises a sampling cover, a sampling gun barrel, a locking valve, a depth positioning ring, a heating box, a membrane filter, a silicone tube, a pre-sampling-pump three-way valve, a chemical titration sampling pump, a glass absorption bottle, an ice bath box, a front three-way valveand a sampling gun inner tube, wherein the sampling cover is in threaded connection with the sampling gun barrel, the sampling gun inner tube is arranged in the sampling gun barrel, and the sampling cover serves as a sampling gun inner tube head fixing part; the depth positioning ring is fixed on the sampling gun barrel through the locking valve; the rear part of the sampling gun barrel is connected with the heating box; in the heating box, the sampling gun inner pipe, the membrane filter and the front three-way valve are sequentially connected in series; and two joints of the front three-wayvalve are exposed out of the heating box. The device has the beneficial effects that a connecting pipeline has tracing heat in the whole process, so HCl sampling loss is reduced, and the situation that HCl is adsorbed in advance and a final measurement result is low due to the fact that water vapor is condensed before entering an absorption bottle is avoided.

Description

technical field [0001] The invention relates to a sampling device, in particular to a sampling device and method for hydrogen chloride in flue gas of a coal-fired unit. Background technique [0002] In the process of coal-fired power generation, trace elements such as chlorine in coal will be released during the boiler combustion process and enter the flue gas. At present, my country's coal-fired units have no special equipment to deal with HCl in flue gas, and wet desulfurization is usually used for collaborative removal. . At present, the measurement equipment for HCl in the exhaust gas of stationary pollution sources mainly includes online direct measurement and manual sampling. Among them, online direct measurement uses optical methods, such as Fourier infrared and so on. Manual sampling is mainly based on HJ 548-2016 "Silver nitrate volumetric method for the determination of hydrogen chloride in waste gas from stationary pollution sources" and HJ 549-2016 "Ion chromato...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/24G01N1/22
CPCG01N1/24G01N1/2258G01N1/2205G01N2001/2261
Inventor 秦刚华吴贤豪陈彪冯向东高强生高凯楠余一凡梁成思王维平祁志福王洁
Owner ZHEJIANG ZHENENG TECHN RES INST
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