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Online SO3 measuring system and method

A measurement system and detector technology, applied in the direction of measurement devices, sampling, instruments, etc., can solve the problems of inaccurate measurement, inability to monitor in real time, complex system, etc., and achieve the effect of avoiding dissolution, simple structure and accurate measurement

Inactive Publication Date: 2017-04-26
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the existing sulfur trioxide measurement technology system complex, inaccurate measurement, and unable to monitor in real time, the present invention provides an online sulfur trioxide sampling measurement system and method

Method used

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  • Online SO3 measuring system and method

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specific Embodiment approach 1

[0027] Specific implementation mode one: as figure 1 As shown, the online sulfur trioxide measurement system described in this embodiment includes a heater 101, a sampling pipe 102, a filter 103, a reaction pipe 104, an air compressor 105, a diluter 106, a flow meter 107, a hydrogen chloride detector 108 and Sampling pump 109;

[0028] The filter 103, the reaction tube 104, the diluter 106, the flowmeter 107, the hydrogen chloride detector 108, and the sampling pump 109 are connected successively through connecting pipes, the outlet of the sampling pipe 102 is connected with the inlet of the filter 103, and the outlet of the filter 103 is The inlet end of the reaction tube 104 is connected through the first connecting pipe, the outlet end of the reaction tube 104 is connected with the inlet end of the diluter 106 through the second connecting pipe, and the outlet end of the diluter 106 is connected with the sampling pump 109 through the third connecting pipe. The flow meter 1...

specific Embodiment approach 2

[0029] Embodiment 2: The sampling tube 102 described in this embodiment is made of polytetrafluoroethylene, an inert material, so as to avoid reaction with sulfuric acid vapor at high temperature. Other components and connections are the same as those in the first embodiment.

specific Embodiment approach 3

[0030] Embodiment 3: The filter described in this embodiment is a heat-resistant quartz filter or a ceramic filter, which can remove dust particles in the sampled flue gas. Other compositions and connections are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to an on-line SO3 measuring system and a method thereof, belongs to the field of gas sampling and measuring, and in order to solve the problems of complex system, inaccurate measurement and incapability of real-time monitoring of SO3 measuring systems in the prior art. The on-line SO3 measuring system comprises a heater, a sampling tube, a filter, a reaction tube, an air compressor, a diluting device, a flow meter, a hydrogen chloride detector and a sampling pump. When flue gas passes through the high temperature heater, sulfuric acid droplets are all converted into sulfuric acid vapor, and a quartz or ceramic filter can effectively remove dust particles in a sample gas. The sulfuric acid vapor can be reacted with calcium chloride in the reaction tube to produce hydrogen chloride, according to a value displayed by the hydrogen chloride detector, a sample gas dilution ratio, and stoichiometric coefficient ratio of the sulfuric acid vapor and the hydrogen chloride, the concentration of the sulfuric acid vapor is determined, and then the concentration of SO3 in the flue gas is determined. The on-line SO3 measuring system is mainly used for sampling and measuring of SO3 / H2SO4 in the flue gas emitted from coal-fired boilers.

Description

technical field [0001] The invention relates to an online sulfur trioxide measurement system and method, mainly aimed at SO 3 / H 2 SO 4 sampling measurement. Background technique [0002] Compared with other pollutants, SO in flue gas from coal-fired boilers 3 The concentration is low, but it will cause great harm to the equipment downstream of the flue and the atmospheric environment. SO 3 After passing through the spray tower, it will combine with water vapor to form sulfuric acid mist, which is easy to corrode the pipeline equipment at the end of the flue. For units equipped with SCR out-of-stock equipment, SO 3 will react with excess NH 3 The reaction produces viscous substances, which block the pores on the surface of the catalyst and shorten the service life of the catalyst. In addition, the acid dew point of flue gas and SO 3 The content is directly related to SO 3 The increase of acid will increase the acid dew point, which will increase the corrosion risk ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/22G01N33/00
CPCG01N1/2247G01N1/2205G01N33/0004
Inventor 苏利鹏杜谦吕东辉高建民董鹤鸣王敏吴少华董芃
Owner HARBIN INST OF TECH
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