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Real-time online detection method and device for SO2 oxidation rate of honeycomb denitration catalyst

A denitrification catalyst and detection device technology, which is applied in the direction of measuring devices, chemical instruments and methods, chemical analysis using catalysis, etc., can solve the problem of lack of uniform standards for oxidation rate detection

Pending Publication Date: 2019-07-30
CENT CHINA BRANCH OF CHINA DATANG CORP SCI & TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thanks to SO 2 The detection of oxidation rate lacks a unified standard and is affected by many design and operating parameters. Therefore, it is necessary to develop a scalable and accurate SO 2 Oxidation rate detection micro-device

Method used

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  • Real-time online detection method and device for SO2 oxidation rate of honeycomb denitration catalyst
  • Real-time online detection method and device for SO2 oxidation rate of honeycomb denitration catalyst
  • Real-time online detection method and device for SO2 oxidation rate of honeycomb denitration catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] see Figure 1-2 , a cellular denitrification catalyst SO 2 Oxidation rate real-time online detection device, the device includes gas distribution system, SO 2 Catalytic oxidation system, SO 3 generate an analysis system,

[0064] The gas distribution system includes steam pipelines, N 2 Pipeline, O 2 pipeline, SO 2 tubing and gas mixers,

[0065] The steam pipeline includes H 2 O bottle, constant flow pump and steam generator, the H 2 The O bottle is connected to the water inlet of the constant flow pump through a pipeline, and the water outlet of the constant flow pump is connected to the steam generator through the pipeline, and the steam generator is connected to the gas mixer through the pipeline.

[0066] The N 2 Pipeline includes N 2 Gas cylinder, mass flow meter A and flow controller A, the N 2 The gas storage cylinder is connected to the mass flow meter A through the pipeline, the mass flow meter A is connected to the flow controller A through the pip...

Embodiment 2

[0080] A kind of honeycomb denitrification catalyst SO 2 The oxidation rate real-time online detection method comprises the following steps:

[0081] (1) Sample preparation and pretreatment

[0082] First, cut the test block from the effective reaction wall of the honeycomb SCR catalyst. The test block needs to be cut into a test sample with 3×3 holes and a height of 100-500mm to meet the test requirements; for the unused honeycomb SCR catalyst, the sample is required Each cross-section is smooth and flat without obvious cracks. Aging treatment should be carried out before the test; to simulate the actual flue gas working conditions of the power plant, under the condition of fixed system flue gas parameters, after continuously feeding the mixed gas for 6 hours, the flue gas at the reactor outlet should be tested every 1h. Medium SO 2 Concentration detection, when the same trend does not exist in the 3 sets of continuous test results (referring to the trend of the 3 sets of m...

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Abstract

The invention discloses a real-time online detection method and device for a SO2 oxidation rate of a honeycomb denitration catalyst. The device mainly comprises a gas distribution system, a SO2 catalytic oxidation system and a SO3 generation analysis system; the SO2 catalytic oxidation system comprises an SCR fixed bed reactor and a control fixed bed reactor. The purposes of adopting the two fixedbed reactors are to reduce system errors and eliminate the influence of a concentrated sulfuric acid absorption liquid on SO2 measurement. Due to the conservation of sulfur atoms before and after a reaction, a subtraction method can be adopted for measuring SO3 by measuring the change of the SO2 gas concentration before and after the reaction. By means of the efficient, rapid and accurate onlinemonitoring method and device for the SO2 oxidation rate of the denitration catalyst in a coal-fired power plant, the detection process of performance indexes of the SO2 oxidation rate of the SCR catalyst is standardized, the detection method, equipment and operation parameters are unified, and the accuracy and comparability of detection results are ensured.

Description

technical field [0001] The invention relates to a honeycomb denitration catalyst SO 2 The invention discloses a method and device for real-time on-line detection of oxidation rate, belonging to the field of detection. Background technique [0002] With the official release of GB13223-2011 "Emission Standards of Air Pollutants for Thermal Power Plants", selective catalytic reduction (SCR) flue gas denitrification technology has become the main technical means for coal-fired power plants to achieve deep denitrification. But the SCR catalyst will also convert the SO in the flue gas 2 catalytic oxidation to SO 3 , SO in flue gas 3 The content is multiplied, which can easily cause equipment blockage, corrosion and serious environmental problems. Therefore, controlling SO in flue gas 3 The generation of SO is imminent. In the SCR denitrification project, in addition to ensuring the denitrification efficiency, the SO 2 The oxidation rate must also be strictly limited. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/90B01D53/50G01N31/10G01N33/00
CPCB01D53/90B01D53/50G01N31/10G01N33/0042
Inventor 熊远南汪永威周晓湘吕小林王强丁朋果符思聪于威振
Owner CENT CHINA BRANCH OF CHINA DATANG CORP SCI & TECH RES INST CO LTD