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Honeycomb structure for automobile exhaust treatment

A honeycomb structure, automobile exhaust technology, applied in the direction of exhaust device, air quality improvement, noise reduction device, etc., can solve the problems of insufficient strength, excessive local current, insufficient sheet strength, etc.

Active Publication Date: 2020-10-27
亿达天地环保技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the experiment found that this will cause two serious problems: (1) The local current is too large and the temperature rises unevenly: after increasing the number of layers, only four to five layers can turn red, and the rest are reddish or not red. Increase the power A similar phenomenon still occurs; (2) The strength of the sheet is far from enough: reducing the width of the sheet has caused the problem of insufficient strength. After ultra-high temperature and rapid cooling, the sheet is severely deformed and the service life is greatly shortened
However, it was also found that only by changing the single-path heating device to a dual-path heating device, there are still significant defects, and there is still the problem of poor catalytic purification effect
[0011] For this reason, the applicant of the present invention has also found through in-depth research that it is difficult for existing catalyst systems to effectively purify and remove HC, CO and NO simultaneously. x , especially in the start-up phase when the exhaust gas temperature is lower than 250°C

Method used

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  • Honeycomb structure for automobile exhaust treatment
  • Honeycomb structure for automobile exhaust treatment
  • Honeycomb structure for automobile exhaust treatment

Examples

Experimental program
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Effect test

Embodiment 1

[0070] The present embodiment provides a honeycomb structure for the treatment of automobile exhaust, which includes a dual-path heating device and a catalytic converter for the treatment of automobile exhaust. Such as Figure 1-4 As shown: at least including an electric heater and a three-way catalytic converter 5 arranged below the electric heater, the electric heater includes a disc-shaped shell 3, a base carrier 4 arranged in the disc-shaped shell 3, fixedly installed on the base The parallel two-way resistance elements on the carrier 4 and the electrodes 6 respectively connected to the resistance elements; in this embodiment, in order to describe the structural composition in detail, the parallel two-way resistance elements are set as the first path resistance element 1 and the second path resistance element 2 .

[0071] The first path resistance element 1 and the second path resistance element 2 are respectively composed of at least two layers of metal partitions and me...

Embodiment 2

[0080] Repeat Example 1, the difference is only that the three-way catalyst is replaced by the multi-layer structure catalyst (i.e. the multi-layer system catalyst) according to the present invention, the multi-layer system catalyst in the catalyst comprises: aluminum oxide layer, intermediate layer, and oxygen storage layer And the catalytically active layer, the intermediate layer is an alloy layer, which includes: 1.5wt.% Al, 0.5wt.% Y, 1.0wt.% Cu, 18wt.% Cr and the rest of Fe, the thickness of the alloy layer It is 0.1mm, and it is applied by spraying; The oxygen storage layer is made up of barium sulfate and oxygen storage material, and the weight ratio of barium sulfate and oxygen storage material is 1:50, and the composition of described oxygen storage material is: 60wt.%Hf 1-x Zr x o 2 , 30wt.% CeO 2 , 6wt.%Y 2 o 3 and 4wt.% La 2 o 3 , where x=0.3, the content of cerium oxide is 8g / L per unit volume of the honeycomb structure; the catalytically active layer is co...

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Abstract

The invention provides a honeycomb structure for automobile exhaust treatment. The honeycomb structure for automobile exhaust treatment comprises a double-path heating device and a catalytic converterwhich are used for automobile exhaust treatment, the double-path heating device comprises an electric heater, the electric heater comprises a disc-shaped shell, a base carrier arranged in the disc-shaped shell and two paths of resistance elements fixedly installed on the base carrier and connected in parallel, each resistance element is composed of at least two layers of metal partition plates and metal corrugated plates each of which is located between every two adjacent metal partition plates, peaks and valleys of each of the metal corrugated plates are electrically connected with the corresponding two layers of metal partition plates, and the catalytic converter comprises a multilayer system catalyst. By using the catalyst, HC, CO and NOx can be effectively purified at the same time.

Description

technical field [0001] The invention relates to a honeycomb structure used for the catalytic treatment of automobile exhaust, more specifically relates to an automobile exhaust purification device including an electric heating heating device and a catalytic converter, and belongs to the technical field of catalytic emission reduction of automobile exhaust pollutants. Background technique [0002] With the development of society, the number of motor vehicles continues to increase, and the emission of harmful gases into the air exceeds the standard seriously, causing a series of environmental problems such as air pollution, smog and greenhouse effect. The three-way catalytic converter converts harmful gases in automobile exhaust into harmless gases. Existing control of pollutant emission reduction in automobile exhaust emissions generally adopts tail gas catalytic treatment technology, that is, a catalytic converter is installed in the tail gas discharge pipe. [0003] CN1288...

Claims

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Application Information

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IPC IPC(8): F01N3/28F01N3/20
CPCF01N3/2803F01N3/2013F01N3/101Y02A50/20
Inventor 夏琦
Owner 亿达天地环保技术股份有限公司