Measuring method of kinetic parameter change rules of after-service SCR (selective catalytic reduction) denitrification system catalyst

A technology of dynamic parameters and measurement methods, applied in the field of electric power engineering, can solve problems such as boiler system structure design and influence on safe and economical operation

Inactive Publication Date: 2013-12-25
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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Problems solved by technology

[0003] Catalyst is the core of power plant SCR flue gas denitrification system, which accounts for about 1/3 of its investment. The selection of catalyst structure and composition is crucial to the safe and economical operation of the ...

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  • Measuring method of kinetic parameter change rules of after-service SCR (selective catalytic reduction) denitrification system catalyst
  • Measuring method of kinetic parameter change rules of after-service SCR (selective catalytic reduction) denitrification system catalyst
  • Measuring method of kinetic parameter change rules of after-service SCR (selective catalytic reduction) denitrification system catalyst

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Embodiment Construction

[0017] The specific implementation of the method for measuring the change law of kinetic parameters of the SCR denitrification system catalyst after service will be described in detail below in conjunction with the accompanying drawings.

[0018] see figure 1 as shown, figure 1 It is a schematic diagram of the structure of the SCR catalyst activity detection test bench, which includes:

[0019] Trace water pump 101, vaporizer 102, mixer 103, preheater 104, heating furnace 106, reactor 105, NO gas standard cylinder 109, O 2 Gas standard cylinder 110, N 2 Gas standard cylinder 108, NH 3 Gas standard gas cylinder 111 and flue gas analyzer 107; Mixer is connected NO gas standard gas cylinder 109, O by conduit 2 Gas standard cylinders 110 and N 2 Gas standard gas cylinder 108 is respectively connected to NO gas, O 2 Gas and N 2 gas; reactor 105 is connected to NH by conduit 3 Gas standard cylinder 111, connected to NH 3 Gas; the reactor 105 is placed in a heating electric ...

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Abstract

The invention relates to a measuring method of kinetic parameter change rules of an after-service SCR (selective catalytic reduction) denitrification system catalyst, which comprises the following steps: establishing an SCR catalyst activity detection experiment table, cutting off a test sample block from the whole in-service catalyst block in site, putting the test sample block in a reactor, and setting experimental parameters for all experiments, including reactor internal temperature, experiment gas introduction amount and ammonia-nitrogen ratio; and simulating the chemical reaction process of the in-service SCR denitrification system catalyst, establishing a chemical reaction model of the catalyst in the reactor, calculating the kinetic parameters of the catalyst, and fitting to obtain a kinetic parameter change rule curve chart for predicting the kinetic parameter change rules of the catalyst. The technique provided by the invention can provide technical support for establishment of a power plant SCR denitrification system operation regulation scheme.

Description

technical field [0001] The invention relates to the technical field of electric power engineering, in particular to a method for measuring the change law of dynamic parameters of a catalyst in an SCR denitrification system after service. Background technique [0002] Selective catalytic reduction denitrification technology, mainly based on TiO 2 V for the carrier 2 o 5 based industrial catalysts, including V 2 o 5 / TiO 2 , V 2 o 5 / TiO 2 -SiO 2 , V 2 o 5 -WO3 / TiO 2 and V 2 o 5 -MoO 3 / TiO 2 , its operating temperature is between 280-420°C, and its denitrification efficiency can reach more than 85%, which can effectively reduce nitrogen oxide emissions and meet increasingly stringent environmental protection requirements, and has been widely used in thermal power generation. In recent years, the research and development of low-temperature SCR denitration catalysts has progressed rapidly, forming a catalyst with activated carbon as the carrier and V 2 o 5 , F...

Claims

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Application Information

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IPC IPC(8): G01N33/00
Inventor 李德波
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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