A diesel engine exhaust particulate matter trap and its trapping method

A particle trap, diesel engine technology, applied in exhaust devices, machines/engines, mechanical equipment, etc., can solve the problems of increasing the pore size of the filter element and the low trapping efficiency of the trap, reducing the airflow speed and improving the trapping efficiency. Set efficiency and increase the effect of contact

Active Publication Date: 2022-05-20
INNER MONGOLIA AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Utilizing this structure can also increase the pore diameter of the filter element on the premise of satisfying the trapping effect, thereby reducing the exhaust back pressure caused by the trap to the diesel engine and reducing the engine power loss, so as to solve the existing problem of single axial flow. The problem of low trapping efficiency

Method used

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  • A diesel engine exhaust particulate matter trap and its trapping method
  • A diesel engine exhaust particulate matter trap and its trapping method
  • A diesel engine exhaust particulate matter trap and its trapping method

Examples

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Embodiment 1

[0039] see image 3 and Figure 4 , the diesel engine exhaust particulate matter trap of this embodiment includes a trap housing that allows engine exhaust to pass through and a particulate trapping device 10 encapsulated in the trap housing, wherein the trap housing is The double-layer housing 1 , the particle trapping device 10 is a filter element 11 with a plurality of radial openings 12 .

[0040] The shape of the trap housing is basically the same as that of a traditional trap, and its basic structure is also tapered at both ends and cylindrical in the middle. One end of the trap housing is the air inlet 4, and the other end is Airflow outlet 5, the exhaust airflow generated by exhaust gas also enters through airflow inlet 4, and after being filtered by particulate trapping device 10, it is discharged from airflow outlet 5. The design of this structure upgrades the existing traditional traps on the market Because the trap of the present invention does not need to carry ...

Embodiment 2

[0051] Figure 6 It is a flow chart of the method for trapping diesel engine exhaust particulate matter in the embodiment of the present invention, please refer to Figure 6 As shown, the method of this embodiment is applied to the diesel engine exhaust particulate filter of embodiment 1.

[0052] The trapping method of diesel engine exhaust particulate matter of the present embodiment comprises the following steps:

[0053] When the exhaust gas in the air inlet 4 passes through the particle trapping device 10 in the trap housing, the axially flowing airflow is changed into a radially flowing airflow by using the pair of oppositely arranged counterpoise holes 9, and radial counterpoise occurs. The collision produces a condensation effect, and the two columns of particles collide with each other due to the hedging of the airflow containing the gas-solid two-phase, and the particles are settled and captured in reverse phase penetration.

[0054] The change of the axially flowi...

Embodiment 3

[0057] The embodiment of the present invention is basically the same as the embodiment 1, the difference is that a kind of automobile in the embodiment of the present invention includes a diesel engine as a kind of engine, and the diesel engine also includes an exhaust particulate matter trap, the exhaust particulate matter trap The collector is the diesel engine exhaust particulate matter collector provided in Example 1.

[0058] When the diesel engine of the automobile is started, the tail gas produced by it is discharged into the diesel exhaust particle trap in the embodiment 1 of the present invention by the tail gas exhaust pipe of the diesel engine, so that the tail gas of the axial flow of the diesel engine is shunted and then generated along the punching hole 9 The radial hedging collision produces a condensation effect, which can reduce the velocity of the exhaust gas flow in the trap for the settling and trapping of particulate matter, prolong the trapping time, and i...

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Abstract

The invention discloses a diesel engine exhaust particle catcher and a catch method thereof. The trap includes a trap housing that allows engine exhaust gas to pass through and a particle trapping device encapsulated in the trap housing, the trap housing is a double-layer shell, and the particle trap device It is a filter element with a plurality of radial openings; the double-layer casing includes an outer casing, an inner casing fixed on the inner side wall of the outer casing, and a number of two-to-two opposite ones for making the radial collision of the exhaust gas flow occur. The counter-punching hole for the condensation effect is provided on the side wall of the inner casing. The present invention replaces the shell of the original collector with a double-layer shell with a radial hedging structure, changes the flow direction of the exhaust gas flow, divides the axially flowing air flow and produces radial hedging in the filter element, thereby reducing the airflow velocity, Increasing the residence time of the two-phase airflow in the trap and increasing the contact between the exhaust airflow and the filter device can further improve the trapping efficiency of the trap.

Description

technical field [0001] The invention relates to the technical field of tail gas purification, in particular to a diesel engine exhaust particulate matter collector and a collecting method thereof. Background technique [0002] Diesel engine exhaust particulate matter is the main contributor to atmospheric particulate matter pollution. With the introduction of the National VI emission standard, the emission requirements for diesel engines are getting higher and higher. The current solution is to add a particulate filter to filter the exhaust particles through the oil-coated rare metal filter element, which can achieve better results, but the filter element of the filter has a small pore size (10um ~ 15um), which will cause the diesel engine to be heavier. The large power loss weakens the advantage of the high horsepower of the diesel engine. [0003] The basic structure of the traditional trapping device is as follows: figure 1 As shown, the exhaust air enters from the air ...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): F01N3/021F01N3/022
CPCF01N3/021F01N3/022Y02A50/2351
Inventor张永安苏赫张海军武佩薛晶郭宇辰
OwnerINNER MONGOLIA AGRICULTURAL UNIVERSITY