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Novel SCR (selective catalytic reduction) system mixer with wire cup structure

A technology of SCR system and mixer, which is applied in the direction of machines/engines, exhaust treatment, mechanical equipment, etc. It can solve the problems of large contact area, difficult adhesion and retention of urea particles, etc., and achieve large contact area and good urea mixing and evaporation effect , fast heating effect

Pending Publication Date: 2020-12-25
GUANGXI YUCHAI MASCH CO LTD
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  • Abstract
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Problems solved by technology

[0006] In view of the above-mentioned existing defects, the purpose of the present invention is to provide a novel wire cup structure SCR system mixer. The contact area between urea particles and the mixing device is large, and the urea particles are not easy to adhere and stay, and the temperature of the mixer is fast, which is beneficial to the urea particles. Evaporated and decomposed into NH3, which is fully mixed with the exhaust gas and then taken away by the exhaust gas, thus solving the problem of urea crystallization in the SCR system

Method used

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  • Novel SCR (selective catalytic reduction) system mixer with wire cup structure
  • Novel SCR (selective catalytic reduction) system mixer with wire cup structure
  • Novel SCR (selective catalytic reduction) system mixer with wire cup structure

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Embodiment Construction

[0022] In order to describe the technical content, achieved goals and effects of the present invention in detail, the following will be described in conjunction with the embodiments and accompanying drawings.

[0023] Such as Figure 1-4 As shown, a new type of wire cup structure SCR system mixer is designed according to the specific embodiment of the scheme. The mixer includes a cylinder body 1, a nozzle seat 7, a swirl mixing tube 2 and a stainless steel wire mesh 10.

[0024] Such as figure 2 As shown, the two ends of the cylinder body 1 are respectively the inlet port 3 and the gas outlet port 4 of the exhaust gas, and the air flow chamber 5 communicating with the inlet port 3 and the tail chamber communicating with the gas outlet port 4 can be set in the cylinder body 1 through a partition 6; image 3 As shown, the swirl mixing tube 2 is fixed in the cylinder body 1 perpendicular to the axis of the cylinder body 1, and the cylinder body 1 is provided with a nozzle seat...

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Abstract

The invention discloses a novel SCR (selective catalytic reduction) system mixer with a wire cup structure. The novel SCR system mixer is characterized by comprising a barrel (1) and a rotational flowmixing pipe (2), wherein a stainless steel wire net (10) is arranged at the bottom of the rotational flow mixing pipe (2), and is formed by weaving and winding steel wires in sequence; and a side surface (11) which is formed by integrally bending upwards and allows waste gas and urea to pass through is formed on the peripheral edge of the stainless steel wire net (10), and the bent edge of the side surface (11) is connected with the bottom of the rotational flow mixing pipe (2). According to the novel SCR system mixer with the wire cup structure, the contact area between urea particles and the mixer is large, the urea particles are not prone to attachment and retention, the mixer is high in temperature rise speed, the urea particles can be evaporated and decomposed into NH3 easily and arebrought away by tail gas after being fully mixed with the tail gas, and therefore, the problem of urea crystallization of an SCR system is solved.

Description

technical field [0001] The invention relates to the technical field of engine parts, in particular to a novel wire cup structure SCR system mixer. Background technique [0002] During the operation of the diesel engine, the urea injection system can calculate the injection amount of the required vehicle urea aqueous solution (referred to as "urea") according to the temperature of the SCR catalyst and the operating conditions of the diesel engine. The metering injection pump injects urea through the nozzle as required. Into the mixer upstream of the SCR, mixed with exhaust gas, atomized and decomposed into NH3, and then enters the SCR catalytic converter, and reacts with NOx inside the catalytic converter to generate N2 and H20 to realize the purification of NOx. The function of the mixer is mainly to make urea and exhaust gas achieve a good mixer effect, thereby crystallizing the urea crystallization problem of the SCR system. Therefore, the role of the mixer structure in t...

Claims

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Application Information

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IPC IPC(8): F01N3/20F01N3/28
CPCF01N3/2066F01N3/2892F01N2570/14F01N2610/02F01N2610/1453Y02T10/12
Inventor 原新涛陶泽民杨树宝王卫兵
Owner GUANGXI YUCHAI MASCH CO LTD
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