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Electric heating type urea mixer

An electric heating type, mixer technology, applied in the direction of machine/engine, muffler, exhaust gas treatment, etc., can solve the problems of poor conversion efficiency, easy to produce urea crystallization, etc., to improve the conversion efficiency, reduce the risk of urea crystallization, heat large area effect

Pending Publication Date: 2021-05-28
无锡亿利环保科技有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The applicant aims at the above-mentioned post-treatment urea mixer under low temperature conditions x Poor conversion efficiency, easy to produce urea crystallization and other disadvantages, provide an electrically heated urea mixer with reasonable structure, improve NO under low temperature conditions x High conversion efficiency, avoiding urea crystallization

Method used

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Embodiment Construction

[0029] The specific implementation manner of the present invention will be described below in conjunction with the accompanying drawings.

[0030] Such as figure 1 , Figure 4 As shown, the upper outer peripheral wall of the cylindrical shell 1 of the present invention is provided with a nozzle seat 2, and the nozzle seat 2 is connected to the urea nozzle (not shown in the figure). Inside the casing 1, facing the nozzle seat 2, there is an electric heating assembly 3, the front and rear sides of the electric heating assembly 3 are respectively fixed on the inner wall surface of the casing 1 by the first gasket 4 and the second gasket 5; the lower side of the casing 1 A deflector 6 is arranged on the inner peripheral wall behind the electric heating assembly 3, and a plurality of through holes 61 are provided on the deflector 6. The deflector 6 can block the outflowing airflow, so that the airflow can be changed to an oblique upward direction. Flow, prevent the local air velo...

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PUM

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Abstract

The invention discloses an electric heating type urea mixer. The electric heating type urea mixer is characterized in that an electric heating assembly is arranged in a shell, a gas inlet channel and a gas inlet cavity which communicate with each other are formed between the electric heating assembly and the inner wall face of the upper side of the front portion of the shell, and a gas outlet channel and a gas outlet cavity which communicate with each other are formed between the electric heating assembly and the inner wall face of the lower side of the rear portion of the shell; and the electric heating assembly is provided with a plurality of gas flow channels, and the plurality of gas flow channels communicate with the gas inlet cavity and the gas outlet cavity. According to the electric heating type urea mixer, under a low-temperature working condition, low-temperature gas flow is heated through the electric heating assembly, and the low-temperature gas flow can be rapidly heated to high temperature, so that the NOx conversion efficiency under the low-temperature working condition is improved, and the urea crystallization risk is reduced.

Description

technical field [0001] The invention relates to the technical field of aftertreatment of engine exhaust gas, in particular to an electrically heated urea mixer. Background technique [0002] In the engine exhaust after-treatment system, the selective catalytic reduction technology (SCR) is usually used to post-treat the engine's exhaust emissions; A mixer is added in the mixer, and urea aqueous solution is sprayed into the mixer, and the urea aqueous solution is decomposed into ammonia gas (NH 3 ), under the action of catalyst, ammonia (NH 3 ) to remove the nitrogen oxides (NO X ) reduced to harmless nitrogen (N 2 ) and water (H 2 O), and finally discharged from the exhaust pipe, so as to achieve the purpose of reducing emissions. [0003] With the implementation of the National VI emission regulations, the exhaust emission has increased the NO x However, under low temperature conditions, the activity of the SCR carrier catalyst itself is poor, resulting in NO x The c...

Claims

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Application Information

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IPC IPC(8): F01N3/28F01N3/20
CPCF01N3/2013F01N3/2066F01N3/2882F01N3/2892F01N2240/16F01N2240/20F01N2610/02F01N2610/102F01N2610/1453F01N2610/1486
Inventor 李江飞牛雨飞刘向民徐谦杨帅田入园倪鹏孟家帅苏赵琪薛红娟乔宝英冯玉杰
Owner 无锡亿利环保科技有限公司
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