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Method and device for mixing liquid and gas

A gas mixing and liquid technology, which is used in exhaust devices, mufflers, exhaust gas treatment and other directions to achieve the effect of improving the speed of gasification and decomposition, improving the effect of reducing nitrogen oxides, and reducing the possibility of

Pending Publication Date: 2018-12-11
武汉水草能源科技研发中心(有限合伙)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This arrangement often has a problem: the atomized urea aqueous solution is composed of droplets (fog) with different diameters before it is completely vaporized.

Method used

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  • Method and device for mixing liquid and gas
  • Method and device for mixing liquid and gas
  • Method and device for mixing liquid and gas

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Embodiment Construction

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

[0031] It should be noted that the experimental methods described in the following embodiments, unless otherwise specified, are conventional methods, and the reagents and materials, if not otherwise specified, can be obtained from commercial sources; in the description of the present invention, The terms "landscape", "portrait", "top", "bottom", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", The orientation or positional relationship indicated by "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device or element must have Certain orientations, co...

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Abstract

The invention discloses a method and device for mixing liquid and gas. The method includes: placing a cone-like mixer with multiple air holes in a gas channel with gas, negative pressure is formed inthe internal mixing chamber of the mixer, a part of the gas flows into the mixing chamber and forms a gas film on the surface of the mixing chamber, atomized liquid is injected into the mixing cavityto gasify and mix with the gas without forming the gas film, and contact of the atomized liquid with any solid surface before atomizing and mixing is avoided. The device comprises the mixer and a liquid atomizing nozzle, the mixer is of a cone-like structure and is provided with a hollow mixing cavity inside, the mixer is fixed in the gas channel with the opening facing the flowing direction of the gas, and multiple run-through air holes are arranged in the mixer; the liquid atomizing nozzle is located in the mixing cavity. By the arrangement, the liquid after atomization can be prevented fromcontacting with any solid before gasification and fully mixing with the gas channel exhaust and evenly distributing in the flow channel section.

Description

technical field [0001] The invention relates to the technical field of liquid-gas mixing. More specifically, the present invention relates to a method and device for mixing liquid and gas, in particular to a method and device for mixing additives and engine exhaust gas of an internal combustion engine exhaust gas purification post-treatment system. Background technique [0002] The current SCR post-treatment system for reducing nitrogen oxides in diesel engines needs to inject liquid or gaseous reactants, such as urea aqueous solution or ammonia, into the engine exhaust pipe or the after-treatment package to fully mix with the engine exhaust gas. Especially the urea aqueous solution needs to be better atomized when spraying, so that the urea can be gasified as soon as possible and decomposed into ammonia gas. Under the catalysis of SCR, ammonia and NOx can react to generate nitrogen gas (N 2 ) and water (H 2 O), in order to achieve the effect of reducing NOx emissions. ...

Claims

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Application Information

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IPC IPC(8): F01N3/20F01N3/28
CPCF01N3/2066F01N3/28F01N2610/02F01N2570/14Y02T10/12
Inventor 李平
Owner 武汉水草能源科技研发中心(有限合伙)
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