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SCR flue gas denitration catalyst, preparation method and application system thereof

A denitrification catalyst, catalyst technology, applied in the direction of chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of catalyst ash blocking, not easy to block ash purification efficiency, etc., to prevent catalyst ash accumulation, specific surface area The effect of enlargement and easy application process

Inactive Publication Date: 2018-06-22
LONGYAN ZIJIN INNOVATION RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For this reason, it is necessary to provide a kind of SCR flue gas denitrification catalyst that can solve the problem of catalyst clogging, and provide a kind of SCR flue gas denitrification catalyst that is not easy to clog, has high purification efficiency, and is convenient to prepare and use, its preparation method and its application system

Method used

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  • SCR flue gas denitration catalyst, preparation method and application system thereof
  • SCR flue gas denitration catalyst, preparation method and application system thereof
  • SCR flue gas denitration catalyst, preparation method and application system thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Mix ceramic fiber, calcium silicate fiber, organic silica sol and water with a mass ratio of 40:40:10:10, stir at room temperature for 3 hours to obtain a mixed filler. The mixed filler is made into a catalyst skeleton by the molding method.

[0036] see figure 1 , the front view of the specific embodiment of the catalyst skeleton; figure 2 DETAILED DESCRIPTION The rear view of the catalyst skeleton; image 3 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A schematic longitudinal section of the catalyst skeleton. The catalyst skeleton 1 is provided with six ventilation grooves 2, and the ventilation grooves are arranged along the air intake direction of the SCR flue gas and distributed in parallel; the notches of the ventilation grooves are arranged at the air intake of the catalyst SCR smoke At the end, the SCR flue gas enters the ventilation slot, and passes through the catalyst to purify the flue gas along the airflow channel of the ventilation slot body. The...

Embodiment 2

[0041] Mix ceramic fiber, calcium silicate fiber, organosilicon sol, and water with a mass ratio of 60:30:5:5, and stir at room temperature for 5 hours to obtain a mixed mud. The mixed mud is made into a catalyst skeleton by adopting the method of casting molding, and a ventilation groove is arranged in the catalyst skeleton, and the ventilation groove is arranged along the air intake direction of the SCR flue gas and distributed in parallel; the notch of the ventilation groove It is arranged at the inlet end of the SCR flue gas of the catalyst, and the SCR flue gas enters the ventilation tank, and passes through the catalyst to purify the flue gas along the airflow channel of the ventilation tank body. The catalyst skeleton is provided with a gas blowback groove, and the gas blowback groove and the ventilation groove are alternately and reversely arranged, and the notch of the gas blowback groove is arranged at the SCR flue gas outlet end of the catalyst; The blowing device b...

Embodiment 3

[0046] Mix ceramic fiber, calcium silicate fiber, organosilicon sol and water with a mass ratio of 50:40:5:5, and stir at room temperature for 6 hours to obtain mixed mud. The mixed mud is made into a catalyst skeleton by adopting the method of casting molding, and a ventilation groove is arranged in the catalyst skeleton, and the ventilation groove is arranged along the air intake direction of the SCR flue gas and distributed in parallel; the notch of the ventilation groove It is arranged at the inlet end of the SCR flue gas of the catalyst, and the SCR flue gas enters the ventilation tank, and passes through the catalyst to purify the flue gas along the airflow channel of the ventilation tank body. The catalyst skeleton is provided with a gas blowback groove, and the gas blowback groove and the ventilation groove are alternately and reversely arranged, and the notch of the gas blowback groove is arranged at the SCR flue gas outlet end of the catalyst; The blowing device blow...

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Abstract

The invention discloses a preparation method of an SCR flue gas denitration catalyst. The preparation method comprises the following steps: skeleton forming, skeleton burning, carrier layer coating and active ingredient loading. The ingredient of organic silicon sol is used in the catalyst skeleton formula of the catalyst through the technical scheme, after the catalyst skeleton is calcined, the organic silicon sol is decomposed, thus a linear or rodlike fiber staggered structure appears inside the catalyst skeleton, gaps existing among the fibers can enable gas molecules to pass through, anddust with the grain diameter of greater than 1 micron is intercepted. Moreover, the specific surface area of an airflow passage is increased through the structure, SCR flue gas can sufficiently reactwith an activated inorganic oxide on the surface of the airflow passage, and a preferable purification effect is reached. The airflow passage and an airflow back flushing passage are also formed in the catalyst, so that ash deposition of the catalyst can be prevented effectively.

Description

technical field [0001] The invention relates to the field of flue gas denitrification, in particular to an SCR flue gas denitrification catalyst, a preparation method and an application system thereof. Background technique [0002] At present, the application of domestic flue gas denitrification technology is relatively mature, and SCR flue gas denitrification technology occupies the largest market share. Therefore, a large number of SCR flue gas denitrification catalysts are put into use every year. [0003] SCR flue gas denitrification catalysts include honeycomb catalysts, flat-plate catalysts and corrugated plate catalysts. The preparation process of these catalysts requires mixing, aging, pre-extrusion, vacuum extrusion molding, and after one-drying, two-drying and calcination, the catalyst is formed. unit, then assemble several catalyst units into a module, and finally install several catalyst modules into the SCR catalytic reactor to form a catalyst bed. In general, ...

Claims

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Application Information

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IPC IPC(8): B01J23/16B01J23/28B01J23/30B01J23/745B01J23/755B01D53/86B01D53/56
CPCB01D53/8628B01J23/16B01J23/28B01J23/30B01J23/745B01J23/755
Inventor 胡建锋童长青吴晓东
Owner LONGYAN ZIJIN INNOVATION RES INST