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Ammine reducing reagent storing device in NH3-SCR system of diesel vehicle

A technology of NH3-SCR and storage devices, which is applied in the direction of noise reduction devices, exhaust devices, mechanical equipment, etc., can solve the problems of promotion restrictions, achieve the effects of avoiding environmental pollution, simplifying the SCR system, and high safety

Inactive Publication Date: 2009-02-11
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The above series of problems make NH 3 -The promotion of SCR technology is limited

Method used

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  • Ammine reducing reagent storing device in NH3-SCR system of diesel vehicle
  • Ammine reducing reagent storing device in NH3-SCR system of diesel vehicle

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Embodiment Construction

[0021] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0022] Such as figure 1 , figure 2As shown, the present invention includes: an outer cylinder, a flange cover 4, an inner cylinder cover 6, an inner cylinder body 9, a stainless steel mass transfer tube 12, a stainless steel wire mesh 13, and an air duct 5, wherein the outer cylinder includes a cylindrical outer cylinder body 1 , flange 3, outer cylinder base 11, have air inlet 10 at the bottom of outer cylinder body 1, have air outlet 2 at the upper part of outer cylinder body; In one piece, the size of the groove matches the outer diameter of the inner cylinder 9; the flange 3 is integrated with the upper end of the outer cylinder 1, and an O-ring groove 8 is opened on the upper end of the flange 3, and under the flange cover 4 Process the O-ring pressure ring 7 at the corresponding position of the end surface and the O-ring groove 8...

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Abstract

The invention relates to an ammonia reducing agent storage device in an NH3-SCR system of a diesel powered car, belonging to the technical field of controlling the pollutant emission of diesel engine tail gas. The device is composed of an inner barrel and an outer barrel, a stainless steel mass transfer tube is arranged at the axle center of the inner barrel, an annular space between the stainless steel mass transfer tube and the inner barrel functions as an adsorbent bed for placing CaCl2 adsorption working medium and NH3 is adsorbed on CaCl2. After being hermetically connected with an inner barrel cover, the inner barrel is placed in an outer barrel. An annular space between the inner barrel and the outer barrel serves as the place where exhaust gas of the diesel engine heats the inner barrel, the exhaust gas enters the barrel from an air inlet at the bottom of the outer barrel to heat the inner barrel and then is discharged from an air outlet at the upper part of the outer barrel, and after adsorption stripping, NH3 is discharged from an air duct through the stainless steel mass transfer tube. The ammonia reducing agent storage device can directly provide NH3 reducing agent for the SCR system and solves the problem of low utilization rate of ammonia reducing agent; the storage device is simple in structure, safe and reliable; by adopting the exhaust gas of the diesel powered car as a heating source, energy can be saved; as the inner and outer barrels are convenient to dismantle, the service condition monitoring and replacement of adsorbents can be realized.

Description

technical field [0001] The invention relates to an ammonia gas storage device, in particular to a diesel vehicle NH 3 - An ammonia reductant storage device in an SCR (ammonia-selective catalytic reduction) system, belonging to the technical field of diesel engine exhaust emission pollutant control. Background technique [0002] Due to the high air-fuel ratio of the diesel engine, the excess oxygen makes the fuel burn fully and reduces the CO, HC, CO 2 emissions, but at the same time lead to high NO x and PM emissions. Therefore, the primary task of controlling the environmental pollution of diesel engines is PM and NO x emissions. Due to diesel exhaust particulate PM and NO x The mechanism of formation is different, so the reduction of particulates and the increase of NO x emissions, the so-called Trade-off effect. At present, countries all over the world are devoting themselves to technical research on reducing diesel particulate emissions, and substantial progress h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/24B01D53/92
CPCY02A50/20
Inventor 郭燕君林赫黄震管斌程琪
Owner SHANGHAI JIAO TONG UNIV
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