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

A technology of regeneration device and particle filter, which is applied to exhaust devices, mufflers, engine components, etc., can solve problems such as explosion and particle filter burning, achieve long service life, easy assembly, and reduce regeneration dead ends.

Inactive Publication Date: 2007-05-23
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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  • Spiral type filtering-regeneration device for particulates in exhaust gas from diesel vehicle
  • Spiral type filtering-regeneration device for particulates in exhaust gas from diesel vehicle
  • Spiral type filtering-regeneration device for particulates in exhaust gas from diesel vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] ①Machining silicon carbide foam ceramics with a volume fraction of 30% and an average foam pore diameter of 1mm into a helical structure with six helical blades, the outer diameter of the helix is ​​φ140mm, the helix depth is 50mm, the blade thickness is 10mm, the blade spacing is 10mm, and the lead is 120mm , Center hole φ10mm.

[0046] ② Machining tubular silicon carbide foam ceramics with an outer diameter of φ180mm and an inner diameter of φ140mm.

[0047] ③ Putting the tubular silicon carbide foam ceramics obtained in ② on the periphery of the spiral structure obtained in ①, and bonding the two firmly with ethyl silicate to obtain a spiral turbulent particle filter. There are two dimensions: φ180mm×100mm and φ180mm×250mm. The former can have electric heating function after welding electrodes.

[0048] ④ On the silicon carbide ceramic electrode bases at both ends of the φ180mm×100mm spiral turbulent particulate filter mentioned in ③, weld a stainless steel column w...

Embodiment 2

[0052] The difference from Example 1 is:

[0053] Before the test, the spiral diesel vehicle exhaust particulate filter-regeneration device was installed at the designated position of the diesel engine exhaust passage, and the engine speed was kept at 2160rpm, the torque was 188Nm, and the power was 42.5kW for 5 hours to make the spiral diesel vehicle exhaust particulate The filter-regeneration device fully accumulates soot, and then connects the electric heating circuit for electric heating regeneration. Carry out the 13 working condition tests with embodiment 1 again after regeneration.

Embodiment 3

[0055] The difference from Example 1 is:

[0056] The volume fraction of silicon carbide foam ceramics constituting the spiral turbulent particle filter is 40%, and the average pore diameter is 1.0mm.

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Abstract

The 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 particle filter-regeneration system for diesel vehicles, specifically a spiral diesel vehicle exhaust particle filter-regeneration device with silicon carbide foam ceramics as the carrier of the filter device, which can effectively reduce the particle emissions of diesel vehicles and can be electrified regeneration. Background technique [0002] Due to the different mixing and combustion methods, the CO and HC in the diesel engine's pollutant emission components are much less than those of gasoline engines, while the particulates are dozens of times or even more than those of gasoline engines. The composition of diesel vehicle particulates is complex, mainly composed of soot, soluble organic matter and some metal oxides. Soot mainly appears in the state of high temperature and oxygen deficiency in the combustion chamber of the diesel engine (such as rapid acceleration of the vehicle or heavy load). Soot (composed of 85% car...

Claims

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Application Information

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Patent Type & Authority Applications(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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