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Method and device for detecting fume denitration catalyst activity

A denitration catalyst and activity detection technology, which is used in measurement devices, preparation of test samples, and air quality improvement, etc., can solve problems such as the reduction of catalyst activity, and achieve the effect of reducing destructive effects, filling technical gaps, and operating reliably.

Active Publication Date: 2014-07-16
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the physical damage to the catalyst caused by temperature fluctuations in the flue gas will also cause the catalyst activity to decrease.

Method used

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  • Method and device for detecting fume denitration catalyst activity

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Take 250cm each of fresh and 8000h regular block denitrification catalysts 3 Place them in the simulated reactor in batches to ensure a good seal between the catalyst and the inner wall of the reactor. Adjust the reaction temperature of the simulated flue gas at 280-380°C, and the space velocity at SV=5000-60000h -1 , NO in flue gas components is 300-700mg / m 3 , SO 2 1200~1800mg / m 3 , O 2 2~6%, NH 3 / NOx is 0.5~1.1, the obtained catalyst activity index (K / K 0 ) is 0.90.

Embodiment 2

[0025] Take 250cm each of fresh and 14400h regular block denitrification catalysts 3 Place them in the simulated reactor in batches to ensure a good seal between the catalyst and the inner wall of the reactor. Adjust the reaction temperature of the simulated flue gas at 280-380°C, and the space velocity at SV=5000-60000h -1 , NO in flue gas components is 300-700mg / m 3 , SO 2 1200~1800mg / m 3 , O 2 2~6%, NH 3 / NOx is 0.5~1.1, the obtained catalyst activity index (K / K 0 ) is 0.81.

Embodiment 3

[0027] Take 250cm each of fresh and 25400h regular block denitrification catalysts 3 Place them in the simulated reactor in batches to ensure a good seal between the catalyst and the inner wall of the reactor. Adjust the reaction temperature of the simulated flue gas at 280-380°C, and the space velocity at SV=5000-60000h -1 , NO in flue gas components is 300-700mg / m 3 , SO 2 1200~1800mg / m 3 , O 2 2~6%, NH 3 / NOx is 0.5~1.1, the obtained catalyst activity index (K / K 0 ) is 0.71.

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Abstract

The invention discloses a method and device for detecting fume denitration catalyst activity, belonging to the technical field of air pollution control of environmental engineering. In the method, a numerical control flowmeter is adopted to precisely adjust the main components of stimulated fume which enters a square-shaped stainless-steel reactor provided with the catalyst to be detected after passing through an efficient rotational flow mixer; an opened square three-segment furnace in a cavity structure is adopted to heat at constant temperature; an embedded temperature measuring device is adopted to measure the changes of the fume temperature in real time; and a reductant gas state NH3 is introduced, and the concentration changes of nitric oxide (NO) of the fume before and after the reductant gas state NH3 passes through the reactor are detected by a fume analyzer to obtain the activity of the catalyst. The device provided by the invention has a simple system, and is accurate in parameter adjustment, reliable in operation and high in experimental efficiency; and by the device, the activities of the catalyst can be dynamically stimulated and detected under different operation conditions, and the gap of the detecting technique of the domestic fume denitration catalyst is filled in.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering air pollution control, and relates to a method and a device for detecting the activity of a flue gas denitrification catalyst during operation and use. Background technique [0002] In recent years, the emissions of nitrogen oxides (NOx) from coal-fired power plants in my country have been rising continuously. It has caused great harm to ecological security. In the "Twelfth Five-Year Plan", the state will take the reduction of NOx emissions as a binding assessment index, and is currently working hard to formulate more stringent emission standards for flue gas pollutants (including NOx) in thermal power plants. [0003] Coal-fired power plants in economically developed areas and environmentally sensitive areas have begun to adopt efficient flue gas denitrification technology - Selective catalytic reduction (Selective catalytic reduction, SCR) process. The principle of SCR denitri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28G01N33/00
CPCY02A50/20
Inventor 陈进生刘海宁赵金平张福旺商雪松
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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