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Automobile exhaust treatment ammonification system

A technology for automobile exhaust and front panel, applied in exhaust treatment, exhaust device, air quality improvement and other directions, can solve problems such as poor ammonia generation effect, and achieve the effect of lifting effect, enhancing strength and increasing temperature

Pending Publication Date: 2019-03-19
DONGFENG COMML VEHICLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the defects and problems existing in the prior art that an additional mixer is required and the ammonia gas generation effect is poor, and to provide an automobile exhaust gas treatment plant that does not need an additional mixer and has a better ammonia gas generation effect. Ammonia system

Method used

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  • Automobile exhaust treatment ammonification system
  • Automobile exhaust treatment ammonification system
  • Automobile exhaust treatment ammonification system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] see Figure 1 to Figure 12 , an ammonia generation system for automobile exhaust treatment, comprising a DPF input end 1, an SCR output end 10, and a transition portion 2, one end of the transition portion 2 communicates with the DPF particle trapping device through the DPF input end 1, and the other end of the transition portion 2 One end communicates with the SCR catalyst device through the SCR output port 10; the transition part 2 includes a transition housing 21 and a transition chamber 22 provided inside, and the transition housing 21 includes a transition front plate 23, a transition rear plate 24 and a transition between the two There is a ring-shaped transitional side wall 25 between them, the top of the transition front plate 23 is provided with a front plate inlet 231 communicating with the DPF input end 1, and the bottom of the transition front plate 23 is provided with a front plate communicating with the SCR output end 10 The outlet 232, and the DPF input e...

Embodiment 2

[0059] Basic content is the same as embodiment 1, the difference is:

[0060] The bottom end of the arc breaker 4 is in contact with the bottom end of the diversion curved plate 5 through the gap X1 of the device plate, and the communication path between the No. 1 cavity X and the transition chamber 22 includes the arc breaker 4 and the Board gap X1. A plate mouth gap 233 is arranged between the deflector panel 3 and the front plate inlet 231, and the plate mouth gap 233 is arranged near the urea injection hole 6, and the injection direction of the urea injection hole 6 is set opposite to the arc breaker 4 . The positions near the transition front plate 23 and the transition rear plate 24 on the guide curved plate 5 are correspondingly provided with a front hole row 53 and a rear hole row 54, and the front hole row 53 and the rear hole row 54 each include a plurality of The bent plate through hole 55.

Embodiment 3

[0062] Basic content is the same as embodiment 1, the difference is:

[0063] The arc breaker 4 comprises an arc frame 41 and a plurality of vertical plate beams 42 and transverse plate beams 43 arranged inside thereof, the arc of the transverse plate beams 43 is consistent with the arc frame 41, and the adjacent transverse plate beams 43 are mutually Parallel, adjacent vertical beams 42 are parallel to each other, each horizontal beam 43 intersects all vertical beams 42, each vertical beam 42 intersects all horizontal beams 43, a single vertical beam 42 Divided by all the horizontal plate beams 43 into a plurality of successively connected horizontal sub-plates 421, the horizontal sub-plates 421 are pierced with broken pieces 44; along the direction of a single vertical plate beam 42, adjacent broken pieces 44 are arranged There is a vertical gap 45; along the direction of the single horizontal plate beam 43, a horizontal gap 46 is set between adjacent broken pieces 44. The ...

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Abstract

The invention relates to an automobile exhaust treatment ammonification system. A transition part between a diesel particulate filter (DPF) input end and an SCR output end comprises a transition partshell and a transition cavity arranged in the transition shell; the transition shell comprises a transition front plate, a transition rear plate and an annular transition side body clamped between thetransition front plate and the transition rear plate; a front plate inlet and a front plate outlet are formed in the top part and the bottom part of the transition front plate; a flow-guiding panel is clamped into the front plate inlet; an arc-shaped crusher and a flow-guiding bend pipe are arranged at the position, close to the front plate inlet, in the transition cavity; the flow-guiding panel,the arc-shaped crusher, the flow-guiding bend pipe, the transition rear plate and the transition side body enclose to form a No.1 cavity communicating with the transition cavity; and a urea sprayinghole communicating with the No.1 cavity is formed in the top part of the transition side body. According to the design, no mixer needs to be extraly arranged, so that the cost and the assembling spaceare saved, the risk of urea crystallization can be reduced, and an ammonia gas generation effect is good.

Description

technical field [0001] The invention relates to a design for purifying engine exhaust gas, in particular to an ammonia generation system for automobile exhaust gas treatment, which is particularly suitable for improving the ammonia gas generation effect without additional mixers. Background technique [0002] Selective Catalytic Reduction technology (Selective Catalytic Reduction, SCR) refers to the use of ammonia, ammonia water, urea or hydrocarbons as reducing agents to reduce NOx to N2, so as to achieve the treatment of tail gas to meet the emission standards. In the prior art, it is necessary to firstly process the exhaust gas of the engine to generate NOx mainly composed of ammonia, and then send it to the SCR catalyst device for SCR reduction reaction. [0003] The application publication number is CN108194176A, and the application publication date is June 22, 2018. The invention patent application discloses a U-shaped mixer device for a square box structure, which inc...

Claims

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Application Information

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IPC IPC(8): F01N3/20F01N3/28
CPCF01N3/2066F01N3/2892F01N2610/02F01N2610/1486Y02A50/20Y02T10/12
Inventor 王启琛冯坦
Owner DONGFENG COMML VEHICLE CO LTD
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