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Device and method for joint evaluation of denitration and demercuration performances of catalyst

A mercury removal performance and catalyst technology, applied in the direction of chemical analysis using catalysis, can solve problems such as complex flue gas composition

Inactive Publication Date: 2014-07-16
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many kinds of denitrification catalysts and the composition of flue gas is complex. What kind of catalyst has both high denitrification activity and strong elemental mercury oxidation activity remains to be further studied.

Method used

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  • Device and method for joint evaluation of denitration and demercuration performances of catalyst
  • Device and method for joint evaluation of denitration and demercuration performances of catalyst
  • Device and method for joint evaluation of denitration and demercuration performances of catalyst

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Experimental program
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Effect test

Embodiment 1

[0026] A device for joint evaluation of catalyst denitration and mercury removal performance, including pipelines I to VII, preheating mixer 8, three-way ball valve I to III, flue gas analyzer 15 and mercury analyzer 16, and two air inlets And a catalytic reactor 12 with an outlet. The catalytic reactor 12 is a vessel containing a catalyst inside. The gas entering from any inlet of the catalytic reactor 12 flows through the catalyst (usually fixed on a carrier) and is discharged from the outlet.

[0027] The inlet of the pipeline I1 is connected to NH 3 The gas source and the outlet are connected to the first air inlet of the catalytic reactor 12.

[0028] The inlet of the pipe Ⅱ 2 is connected to O 2 The air source and outlet are connected to the air inlet of the preheating mixer 8. The inlet of the pipe III3 is connected to the NO gas source, and the outlet is connected to the air inlet of the preheating mixer 8. The inlet of the pipe IV4 is connected to N 2 The air source and...

Embodiment 2

[0034] In this embodiment, the device described in embodiment 1 is used to jointly evaluate the performance of catalyst denitration and mercury removal, including the following steps:

[0035] 1) Adjust the three-way ball valve I9 ​​so that A 1 Mouth and A 2 Port connection, A 3 The port is closed, adjust the three-way ball valve Ⅱ10, so that B 1 Mouth, B 2 口和B 3 The ports communicate with each other, adjust the three-way ball valve Ⅲ11 so that C 2 口和C 3 Port connection, C 1 The mouth is closed. Even if the mixed gas from the preheating mixer 8 does not pass through the catalyst 13, it directly enters the flue gas analyzer 15 and the mercury analyzer 16.

[0036] 2) Pass O into the preheating mixer 8 through pipes Ⅱ~Ⅷ 2 , NO, N 2 , Mercury vapor, HCl and SO 2 gas. At this time, the one-way valve 22 on the pipeline I is closed. The flue gas analyzer 15 detects the initial concentration C of NO NO,in , The mercury analyzer 16 detects the initial concentration of mercury vapor [Hg 0 ...

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Abstract

The aim of the invention is to provide a device and a method for joint evaluation of denitration and demercuration performances of a catalyst. The device comprises pipelines I, II, III, IV, V and VII, a pressure reducing valve, a filter, a mass flowmeter, a one-way valve, a preheating mixer, an electric heating furnace, three-way ball valves I, II and III, a flue gas analyzer, a mercury analyzer, and a catalytic reactor with two gas inlet and a gas outlet. Actual conditions of a factory are simulated by production of flue gases with different ratios. The catalyst with good effects both on denitration and demercuration specific to a specific flue gas can be selected by replacing of different types of catalysts.

Description

Technical field [0001] The invention belongs to the technical field of detecting the denitration activity and mercury oxidation activity of catalysts used in the denitration and mercury removal system of coal-fired power plants Background technique [0002] Nitrogen oxides NOx and mercury are the main air pollutants emitted by coal-fired power plants. The emission of nitrogen oxides can cause environmental problems such as acid rain, greenhouse effect and ozone layer destruction, and seriously endanger human health and social development. [0003] The Ministry of Environmental Protection and the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China jointly issued the GB13223-2011 thermal power plant air pollutant emission standards, which accurately stipulates: since January 1, 2015, coal-fired boilers shall implement the mercury and mercury specified in Table 1 in the document. Its compound pollutant emission limit (no more than ...

Claims

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Application Information

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IPC IPC(8): G01N31/10
Inventor 杨强杨剑赵冬刘清才孙健贺媛媛刘浪兰苑培孔明李琳徐敏人
Owner CHONGQING UNIV
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