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Composite filtering-regeneration device for particulates in exhaust gas from diesel vehicle

A technology of composite structure and regeneration device, which is applied to exhaust devices, mufflers, engine components, etc., can solve problems such as explosion and particle filter melting, and achieve the effects of long service life, simple structure and uniform temperature distribution.

Inactive Publication Date: 2008-09-17
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] No matter what kind of regeneration method is used, there are two problems: one is the problem of regeneration efficiency, and the other is that the particle filter is often melted or burst due to the rapid heat release of particles during regeneration.

Method used

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  • Composite filtering-regeneration device for particulates in exhaust gas from diesel vehicle
  • Composite filtering-regeneration device for particulates in exhaust gas from diesel vehicle
  • Composite filtering-regeneration device for particulates in exhaust gas from diesel vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] ①The silicon carbide foam ceramic with a volume fraction of 30% and an average foam diameter of 1mm is machined into a spiral structure with six spiral blades. , the center hole φ10mm.

[0050] ②Machining tubular silicon carbide foam ceramics, with an outer diameter of φ180mm and an inner diameter of φ140mm.

[0051] ③ The tubular silicon carbide foam ceramics obtained in ② are sleeved on the periphery of the spiral structure obtained in ①, and the two are firmly bonded with ethyl silicate to obtain a spiral turbulent particulate filter. The external dimension is φ180mm×100mm.

[0052] ④Take two silicon carbide ceramic electrodes φ20mm×15mm, and solder them on both ends of the φ180mm×100mm spiral turbulent particle filter described in ③ by brazing, as the base of the metal electrode; A stainless steel column with a diameter of 6mm is brazed on each seat as an electrode connected to the wire; a spiral turbulent particle filter with an electric heating regeneration func...

Embodiment 2

[0057] The difference from Example 1 is that:

[0058] Before the test, the electric heating spiral turbulent particulate filter was installed in the designated position of the exhaust passage of the diesel engine, and the engine speed was 2160rpm, the torque was 188Nm, and the power was 42.5kW to run for 5 hours, so that the electric heating spiral turbulent particulate filter was operated for 5 hours. The filter fully accumulates soot, and then turns on the electric heating circuit for electric heating regeneration. After regeneration, the same 13 working condition test as in Example 1 was carried out.

Embodiment 3

[0060] The difference from Example 1 is that:

[0061] The volume fraction of silicon carbide foam ceramics composing the electrically heated spiral turbulent particulate filter and the wall-flow particulate filter is 40%.

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Abstract

It relates to the particle filter and regeneration system of the diesel engine, made of carbide ceramics, comprising the power and particle filter. His particle filter and regeneration system of diesel engine comprises power, electric and nonelectric heat spiral particle filter made of carbide ceramics installing together inside the housing of the purifier connected with the exhaust of the diesel engine. It is highly efficient in purification and controllable in conductivity, and fine durability. Apart from that, it is low in cost, simple in structure and easy for assembly.

Description

technical field [0001] The invention relates to a diesel vehicle particulate filter-regeneration system, in particular to a composite structure diesel vehicle exhaust particle filter-regeneration device which uses a silicon carbide foam ceramic as a filter device carrier and adopts a combination of spiral type and wall flow type. It can effectively reduce particulate emissions from diesel vehicles and can be regenerated with electricity. Background technique [0002] Due to the different mixing and combustion methods, the CO and HC in the pollutants of the diesel engine are much less than those of the gasoline engine, but the particles are dozens of times or more than those of the gasoline engine. The composition of diesel particulates is complex, mainly composed of soot, soluble organic matter and some metal oxides. Soot mainly occurs in the state of high temperature and oxygen deficiency in the combustion chamber of the diesel engine (such as rapid acceleration of the veh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N3/023
Inventor 张劲松田冲杨振明曹小明刘强郝传勇李明天
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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