Drip irrigation type reduction catalyst exhaust pipe

A technology for exhaust pipes and catalysts, applied in exhaust devices, noise reduction devices, engine components, etc., can solve problems such as troublesome use and cost of money, and achieve the effect of reducing pollution

Inactive Publication Date: 2017-09-29
陈温乐
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the ratio of diesel oil and urea for conversion and reduction is usually 20:1 (that is, 1 part of urea is needed for every 20 parts of diesel oil used), the consumption of urea is very fast, and it must be added frequently to maintain normal operation, which is very difficult to use. troublesome and costly

Method used

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  • Drip irrigation type reduction catalyst exhaust pipe
  • Drip irrigation type reduction catalyst exhaust pipe
  • Drip irrigation type reduction catalyst exhaust pipe

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example 》

[0032] Such as figure 1 and figure 2 As shown, the first embodiment of the drip irrigation reduction catalyst exhaust pipe provided by the present invention includes an exhaust pipe 1, which has an exhaust gas inlet 11 and an exhaust gas inlet 11 which are located at both axial ends and communicate with each other. The outlet 12 and the wall of the exhaust pipe 1 are provided with several through first holes 10 , and the first holes 10 are arranged in a straight line along the axial direction of the exhaust pipe 1 . Several straight-through ceramic filter elements 2 and a wall-flow filter element 3 are arranged in the exhaust pipe 1; preferably, the straight-through ceramic filter elements 2 and wall-flow filter elements 3 are arranged at intervals in the exhaust pipe 1; The outer diameters of the straight-through ceramic filter element 2 and the wall-flow filter element 3 are coated with liquid-absorbable ceramic wool 2A, and these straight-through ceramic filter elements 2...

no. 2 example 》

[0038] Such as image 3As shown, the second embodiment of the drip irrigation type reduction catalyst exhaust pipe provided by the present invention basically has the same structure as the first embodiment, the only difference is that several exhaust pipes are axially arranged in the exhaust pipe 1. Straight-through ceramic filter element 2 without any wall-flow filter element. In this way, after the vehicle is started, the solenoid valve 6 will be opened simultaneously to supply an appropriate amount of urea water from the container 5 to the ceramic wool 2A through the second hole 41 of the draft pipe 4 and the first hole 10 of the exhaust pipe 1. 2A keeps the wet state after absorbing the urea water, and continuously infiltrates the urea water into each straight-through ceramic filter element 2 . When the exhaust gas emitted by the diesel engine enters through the exhaust gas inlet 11 at one end of the exhaust pipe 1 and is discharged from the exhaust gas outlet 12 at the o...

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Abstract

The invention discloses a drip irrigation type reduction catalyst exhaust pipe. A plurality of first holes are formed in the pipe wall of an exhaust pipe body; a plurality of cut-through type ceramic filter elements are arranged in the exhaust pipe body in the axial direction from a waste gas inlet to a waste gas outlet, or a wall flow type filter element is arranged at the position closest to the waste gas outlet; a flow guiding pipe connected with a container and provided with a plurality of second holes is arranged outside the exhaust pipe body; and the second holes correspond to the first holes. Whether urea water contained in the container passes through the pipe or not is controlled by an electromagnetic valve, the urea water enters the exhaust pipe body in a drip irrigation manner by means of the second holes and the first holes to be absorbed by ceramic cotton wrapped on the outer diameters of the cut-through type ceramic filter elements and the outer diameter of the wall flow type filter element, and then the urea water permeates into hole gaps of the cut-through type ceramic filter elements and the wall flow type filter element to serve as catalysts, and exhausted toxic waste gas such as nitrogen oxide (NOx) can be decomposed and reduced into nitrogen and water by urea or ammonia when passing through the cut-through type ceramic filter elements and the wall flow type filter element, so that pollution to the environment can be reduced.

Description

technical field [0001] The invention relates to a catalytic conversion device specially used for the exhaust pipe of a diesel engine, in particular to a device which can effectively completely purify the exhaust gas discharged from the diesel engine. Background technique [0002] The role of diesel particulate filter (abbreviated as DPF) is to capture and collect the exhaust gas burned by diesel vehicles and filter carbon particles. When the amount of carbon particles trapped reaches a certain level, the vehicle's ECU trip computer will perform a "filter regeneration" operation to burn the carbon particles in the filter into carbon dioxide and discharge it to purify the filter to maintain the filtering function. [0003] In addition to carbon particles, the exhaust gas emitted by diesel vehicles also contains nitrogen oxides (NOx), which can pollute the environment. The system of the device is to inject urea into the burned exhaust gas through the urea tank installed in the...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): F01N13/08F01N3/021F01N13/00F01N3/28
CPCF01N13/082F01N3/021F01N3/2825F01N13/00
Inventor陈温乐
Owner陈温乐