Coal pyrolysis gas elemental mercury sampling system

A sampling system and elemental mercury technology, applied in the direction of sampling devices, etc., can solve the problems of inaccurate reflection of mercury concentration, complex sampling site operation, harsh environmental requirements, etc., and achieve good results, convenient packaging and transportation, and low cost

Inactive Publication Date: 2018-05-04
NINGXIA UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Existing sampling instruments generally have problems such as complex sampling site operation, inconvenient portability, high sampling cost, low collection efficiency, lo

Method used

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  • Coal pyrolysis gas elemental mercury sampling system
  • Coal pyrolysis gas elemental mercury sampling system

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Embodiment Construction

[0014] The coal pyrolysis gas elemental mercury sampling system includes a sampling gun, an adsorption tube, an adsorbent, and a solution absorption tank; the sampling gun is connected to the adsorption tube, and the docking position of the adsorption tube and the sampling gun is provided with an internal and external thread or a frosted interface that cooperates with each other. The inlet of the adsorption tube is equipped with quartz wool, the adsorbent is located inside the adsorption tube, and the solution absorption pool is located at the outlet of the adsorption tube; the adsorption tube is made of quartz tube, the adsorption tube is a variable diameter tube, and the diameter of the inlet connecting the sampling gun and the adsorption tube becomes smaller gradually. The inner diameter gradually changes from 10mm to 4mm.

[0015] as attached figure 1 As shown, the adsorption tube is divided into three sections, the first section is an adsorption section with an inner diam...

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Abstract

The invention relates to a system for measuring and sampling mercury in pyrolysis gas in a coal pyrolysis utilization process. The invention self-designs and establishes a set of sampling system on the basis of the conventional dry adsorption mercury measuring method. An OHM method and a Method 30B method are combined, and the sampling system comprises a KCl solution and an adsorbent for modifiedactivated carbon, and used for respectively adsorbing gaseous divalent mercury and gaseous zero-valent mercury in flue gas. The system disclosed by the invention is simple in operation and low in cost. The designed sampling system has the characteristics of being low in blank background value of a mercury adsorption tube, small in sampling size, short in sampling time and convenient in sampling equipment package and transport, can realize form analysis of gaseous mercury in the flue gas, and has a certain industrial value.

Description

technical field [0001] The invention belongs to the technical field of gas elemental mercury detection, in particular to a measurement and sampling system for mercury in pyrolysis gas during coal pyrolysis utilization, and further relates to the adsorption treatment of mercury by the design of an adsorption tube. Background technique [0002] One of the main sources of mercury emissions to the atmosphere is coal combustion, and the mercury pollutant emissions caused by coal combustion account for a large part of the mercury released by human activities every year. Tail gas detection and control after coal combustion is an effective measure to reduce the amount of mercury released during the coal combustion process, which requires sampling the tail gas to detect the mercury concentration. According to different concentrations to choose appropriate control measures. [0003] There are three main forms of mercury in flue gas: elemental mercury, divalent mercury and particulate...

Claims

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Application Information

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IPC IPC(8): G01N1/22
CPCG01N1/22
Inventor 马晶晶郭庆杰
Owner NINGXIA UNIVERSITY
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