Drying equipment and application thereof

A technology of drying equipment and equipment, applied in liquid spraying device, pretreatment surface, spraying device, etc., can solve problems such as poor coating firmness

Active Publication Date: 2021-06-04
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention provides a drying device and its application, which can solve the problem of poor coating firmness caused by cracking or peeling of the coating during the drying process of the existing honeycomb metal substrate. question

Method used

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  • Drying equipment and application thereof
  • Drying equipment and application thereof
  • Drying equipment and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] Preparation of washcoat slurry: select a cylindrical honeycomb metal substrate with a size of 400cpsi The alumina slurry coating is loaded by the slurry coating method, the coating load is about 15% of the mass of the honeycomb metal substrate, and the drying equipment of the present invention is used for drying treatment, and the sample is marked as Example-1.

[0087] Drying process parameters: the temperature is 90°C, the relative humidity is 85%, and the drying time is 15 minutes.

Embodiment 2

[0089] Preparation of washcoat slurry: same as in Example 1, the sample is marked as Example-2.

[0090] Drying process parameters: the temperature is 90°C, the relative humidity is 60%, and the drying time is 15 minutes.

Embodiment 3

[0092] Preparation of washcoat slurry: same as in Example 1, the sample is marked as Example-3.

[0093] Drying process parameters: the temperature is 90°C, the relative humidity is 35%, and the drying time is 15 minutes.

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Abstract

The invention discloses drying equipment and application thereof, belongs to the technical field of overall configuration catalyst preparation equipment, and solves the problem that the coating firmness is poor due to the fact that a coating cracks or strips in the drying process of a coated slurry coating of an existing honeycomb metal matrix. According to the drying equipment, hot air is provided by an arranged hot air supply assembly, atomized water is provided by a water supply assembly, and the hot air and the atomized water are mixed through an air-water mixer to form an air-water mixture, and then the air-water mixture dries a to-be-dried product placed on a supporting platform. According to the drying equipment, the slurry coating loaded on the honeycomb metal matrix is dried with the hot air with certain humidity, so that shrinkage stress caused by the difference between the drying rate of the surface of the coating and the drying rate of the interior of the coating in the drying process of the slurry coating can be effectively relieved, and then the probability that the surface of the coating cracks is avoided or reduced.

Description

technical field [0001] The invention relates to the technical field of monolithic catalyst preparation equipment, in particular to a drying equipment and its application. Background technique [0002] Since the 1970s and 1980s, honeycomb metal matrix catalysts have been widely used in automobile exhaust purification, and the preparation technology of honeycomb metal matrix catalysts has received more and more attention. Compared with ceramic matrix catalysts, honeycomb metal matrix catalysts have the advantages of small heat capacity, high heat transfer efficiency, high mechanical strength, high porosity, and reduced resistance, and have been widely used in catalytic reaction systems involving endothermic and exothermic reactions. research and application. [0003] The conventional preparation process of honeycomb metal substrate catalyst includes substrate pretreatment, coating slurry preparation, coating coating, drying and calcination. However, due to the smooth surface...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D3/04B05B7/04B05B12/08B05B12/10
CPCB05D3/0413B05B7/0416B05B12/084B05B12/10
Inventor 王胜王树东倪长军林乐
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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