Novel drying and calcining process for integrated extrusion type diesel vehicle denitration catalyst

A technology of denitrification catalyst and calcination process, which is applied in the field of dry calcination process of new type extruded diesel vehicle denitrification catalyst, which can solve the problems of low qualified rate of finished products, failure of honeycomb denitrification catalyst calcination process to achieve the expected effect, catalyst strength and physical defects High index requirements and other issues, to achieve the product qualification rate guarantee, uniform and stable air circulation, to avoid the effect of dry cracking

Active Publication Date: 2016-10-12
TIANHE BAODING ENVIRONMENTAL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current honeycomb denitrification catalyst adopts a combination of primary drying, secondary drying and calcination, while the diesel vehicle denitrification catalyst is integrally formed, and has high requirements for

Method used

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  • Novel drying and calcining process for integrated extrusion type diesel vehicle denitration catalyst
  • Novel drying and calcining process for integrated extrusion type diesel vehicle denitration catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. The first-level drying process of the catalyst is carried out in the drying room with the above-mentioned air inlet and outlet control, placed on the rack car, and each layer is discharged horizontally, evenly arranged, and the following temperature curve is implemented:

[0028] temperature / ℃

30

35

40

43

45

48

50

55

60

time / h

24

24

24

24

24

24

24

24

24

[0029] 2. The catalyst calcination process is carried out in a mesh belt kiln with air inlet in the form of a wind cone. The mesh belt kiln has a total of 30 temperature zones, and the temperature zones can also be increased or decreased appropriately, but the trend of the execution temperature curve should be consistent. The mesh belt speed is 2.4m / h, and the following temperature curve is executed:

[0030] zone 1

Embodiment 2

[0032] 1. The first-level drying process of the catalyst is carried out in the drying room with the above-mentioned air inlet and outlet control, placed on the rack car, and each layer is discharged horizontally, evenly arranged, and the following temperature curve is implemented:

[0033] temperature / ℃

30

35

40

43

45

48

50

55

60

time / h

48

24

24

24

24

24

48

24

24

[0034] 2. The catalyst calcination process is carried out in a mesh belt kiln with air inlet in the form of a wind cone. The mesh belt kiln has a total of 30 temperature zones, the mesh belt speed is 2.4m / h, and the following temperature curve is implemented:

[0035] zone 1

Embodiment 3

[0037] 1. The first-level drying process of the catalyst is carried out in the drying room with the above-mentioned air inlet and outlet control, placed on the rack car, and each layer is discharged horizontally, evenly arranged, and the following temperature curve is implemented:

[0038] temperature / ℃

30

35

40

43

45

48

50

55

60

time / h

48

48

24

48

24

48

48

24

24

[0039] 2. The catalyst calcination process is carried out in a mesh belt kiln with air inlet in the form of a wind cone. The mesh belt kiln has a total of 30 temperature zones, the mesh belt speed is 2.4m / h, and the following temperature curve is implemented:

[0040] zone 1

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PUM

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Abstract

The invention discloses a novel drying and calcining process for an integrated extrusion type diesel vehicle denitration catalyst. The novel drying and calcining process comprises primary drying and calcining, during primary drying, intensive type air intake and intensive type air discharge are adopted, so shat uniform and stable air current circulation can be guaranteed, and therefore, a uniform moisture removal effect is achieved; during calcining, a calcining furnace adopts wind-cone-form air intake, and radioactive cone-shaped air with a uniform temperature is formed through a specific cone-shaped air inlet, so that uniformity of hot air can be controlled, and seasoning cracks due to the fact that the catalyst is directly blown by hot air are avoided; and on the premise of reaching indexes such as strength and physical defects of the diesel vehicle denitration catalyst, the percent of pass of finally obtained products is guaranteed.

Description

technical field [0001] The invention belongs to the field of catalytic materials for denitrification of diesel vehicle tail gas, and relates to a drying and calcining process of a novel integrated extruding diesel vehicle denitrification catalyst. Background technique [0002] With the implementation of my country's National IV regulations on diesel vehicle exhaust emissions in early 2015, many domestic diesel vehicle manufacturers are facing the update and upgrade of exhaust emission devices, and the most important and core of them is the catalyst. [0003] At present, there are three mainstream technologies for internal combustion engine exhaust gas treatment in China: [0004] A three-way catalytic device, the basic principle is that carrier ceramics are combined with three-way catalyst materials, and its manufacturing process is divided into vacuum adsorption type and active impregnation type; it is mainly used in the gasoline vehicle industry; due to its carrier ceramic...

Claims

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Application Information

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IPC IPC(8): F27B9/26F27B9/10F27B9/40
CPCF27B9/10F27B9/262F27B9/40
Inventor 王丽娜张新华闫坤鹏於承志
Owner TIANHE BAODING ENVIRONMENTAL ENG
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