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Denitration catalyst production process

A denitrification catalyst and production process technology, applied in the field of denitrification catalysts, can solve problems such as surface cracks of catalyst products, lack of protection of catalyst products, adverse effects of catalyst product structural strength, etc., and achieve the effect of preventing structural strength

Pending Publication Date: 2020-02-04
SHANDONG BOLIN ENVIRONMENTAL PROTECTION TECH DEV
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Problems solved by technology

[0004] However, in the existing denitration catalyst production process, the catalyst product lacks certain protection from the extrusion process to the drying process, so that the catalyst product is directly exposed to dryness, and it is easy to cause cracks on the surface of the catalyst product during drying, which affects the structural strength of the catalyst product. have adverse effects

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Embodiment Construction

[0042] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0043] Such as figure 1 Shown, a kind of production technology of denitration catalyst comprises the steps:

[0044] A1. Mixing: Add pure titanium dioxide, ammonium metatungstate, ammonium metavanadate, glass fiber, stearic acid, PEO, CMC, wood pulp, MEA and other raw materials into the mixer and stir.

[0045] A2. Filtration: Receive the raw materials that have been mixed in the mixer and pre-extrude the raw materials to form strip-shaped coarse products;

[0046] A3. Stale: age the filtered strip-shaped coarse product, and the aging period is 24 hours;

[0047] A4. Extrusion molding: Put the stale raw materials into the extruder, so that the raw materials are extruded from the extruder die to form a honeycomb catalyst crude product;

[0048] A5. Protection: Use a protective paper case to package and seal the crude catalyst product;

[0049] A6. Primary ...

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Abstract

The invention discloses a denitration catalyst production process, which comprises: A1, mixing; A2, filtering; A3, ageing; S4, extrusion molding: putting the aged raw material into an extruder, and extruding the raw material from an extruder mold to form a honeycomb-like catalyst crude product; A5, protection: packaging and sealing the catalyst crude product by using a protection paper shell; A6,primary drying: placing the protected catalyst crude product on a cart, pushing into a drying chamber, and drying; A7, secondary drying; A8, roasting; A9, cutting; and A10, packaging, wherein the stepA6 is divided into four stages, the first stage is a heating constant-humidity stage, the second stage is a constant-temperature constant-humidity stage, the third stage is a constant-temperature dehumidification stage, and the fourth stage is a gentle cooling stage. According to the invention, with the production process, cracks are prevented from being generated on the surface of the catalyst product, and the structural strength of the catalyst product is guaranteed.

Description

technical field [0001] The invention relates to the field of denitration catalysts, in particular to a production process of the denitration catalyst. Background technique [0002] NOx is the main pollutant that forms acid rain, photochemical smog and atmospheric ozone layer destruction. Therefore, how to effectively remove nitrogen oxides in flue gas has become an urgent problem to be solved. In the current denitrification technology, selective catalytic reduction (SCR) uses ammonia and other reducing agents to selectively reduce and convert NOx in exhaust gas into N2 and H2O that are harmless to the atmosphere through the action of a catalyst, which has good selectivity and efficiency. It has become the most widely used flue gas denitrification technology at present. The existing SCR denitrification process uses a fixed bed denitrification reactor, the catalyst adopts a honeycomb type, a plate type or a corrugated type, and the catalyst is placed in the reactor in the fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/30B01J37/08B01J37/00B01D53/86B01D53/56
CPCB01J23/30B01J37/08B01J37/0009B01J37/00B01D53/8625
Inventor 董殿英赵延强董俊杰吴光勇
Owner SHANDONG BOLIN ENVIRONMENTAL PROTECTION TECH DEV