Diesel engine high pressure scr ventilation and pressure stabilization system

A diesel engine, SCR reactor technology, applied in mechanical equipment, exhaust devices, exhaust treatment and other directions, can solve the problems of poor sealing, slow ventilation speed, large gas consumption, etc., to improve stability and rapid ventilation. Effect

Active Publication Date: 2021-02-05
中国船舶集团有限公司第七一一研究所
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing SCR ventilation devices usually install a throttling orifice at the inlet and outlet of compressed air to keep the compressed air purging, but this structure has poor sealing performance, slow ventilation speed, large air consumption, and system instability. defect

Method used

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  • Diesel engine high pressure scr ventilation and pressure stabilization system

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Embodiment Construction

[0025] In the following description, numerous specific details are given in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without one or more of these details. In other examples, some technical features known in the art are not described in order to avoid confusion with the present invention.

[0026] In the following description, for a thorough understanding of the present invention, the detailed structure will be set forth in order to explain the invention. It is evident that the practice of the invention is not limited to specific details familiar to those skilled in the art. Preferred embodiments of the present invention are described in detail below, however, the present invention may have other embodiments besides these detailed descriptions and should not be construed as being limited to the embodiments set forth herein.

[0027] It should be ...

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Abstract

The invention discloses a diesel engine high-pressure SCR ventilating and stabilizing system, comprising an SCR reactor, an air intake pipeline and an exhaust pipeline respectively connected to an air inlet and an exhaust outlet of the SCR reactor, a differential pressure sensing device and a control device , the first control valve is set on the intake pipeline, the second control valve is set on the exhaust pipeline, the control device is connected with the differential pressure sensing device, and the first and second control valves; the control device controls the opening of the first and second control valves, The SCR ventilating and stabilizing system starts to ventilate, and the exhaust gas is pushed by the compressed air entering from the intake pipe to be discharged from the exhaust pipe; after the ventilating is completed, the control device closes the second control valve, and according to the Control the flow of compressed air entering the SCR reactor and control whether to open the second control valve, so as to maintain the gas pressure difference between the SCR reactor and the exhaust side of the diesel engine within a predetermined pressure difference range. The invention realizes quick ventilation and ensures precise control and stability of pressure difference.

Description

technical field [0001] The invention relates to the technical field of diesel engine tail gas treatment, and more particularly relates to a diesel engine high-pressure SCR ventilation and pressure stabilization system. Background technique [0002] Using SCR (Selective Catalytic Reduction, Selective Catalytic Reduction) is marine diesel engine exhaust NO X The mainstream technology of post-processing. Existing SCR ventilation devices usually install a throttling orifice at the inlet and outlet of compressed air to keep the compressed air purging, but this structure has poor sealing performance, slow ventilation speed, large air consumption, and system instability. defect. [0003] Therefore, it is necessary to provide an improved diesel engine high-pressure SCR ventilating and stabilizing system to at least partly solve the above-mentioned problems. Contents of the invention [0004] A series of concepts in simplified form are introduced in the Summary of the Invention,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N3/20F01N9/00
CPCF01N3/208F01N2570/14F01N2610/02F01N3/2066F01N2560/08F01N2590/02F01N2270/08F01N3/30F01N3/225Y02T10/12F01N2610/1453F01N2550/14Y02T10/40F01N2270/02F01N2610/08
Inventor 王志刚朱向利李晓波沈腾陈秋燕沈飞翔
Owner 中国船舶集团有限公司第七一一研究所
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