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Turbine front-back switchable SCR denitration system

A SCR system, switchable technology, applied in the field of switchable SCR denitrification system before and after the vortex, can solve the problems such as difficult to meet the requirements of tail gas treatment, insufficient temperature, etc., to avoid the decline of purification effect, avoid waste, and high reliability Effect

Inactive Publication Date: 2018-09-28
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But when the load is small, the temperature behind the turbine is not enough to drive the SCR system, and it is difficult to meet the requirements of exhaust gas treatment

Method used

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  • Turbine front-back switchable SCR denitration system
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  • Turbine front-back switchable SCR denitration system

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Embodiment Construction

[0038] In the switchable SCR denitrification system provided by the embodiments of the present disclosure, the reaction temperature of the catalytic reduction reaction in the SCR system is ensured by switching the intake sequence of the turbine and the SCR system, thereby ensuring the treatment efficiency of engine exhaust gas.

[0039] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the present disclosure will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0040] figure 1 It is a structural schematic diagram of the switchable SCR denitrification system of the present disclosure.

[0041] The present disclosure provides a switchable SCR denitrification system before and after the vortex, such as figure 1As shown, it includes: a turbine 100, which is driven by airflow to do work; an SCR system 200, which is connected in series with the turbine 1...

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Abstract

The invention provides a turbine front-back switchable SCR denitration system. The SCR denitration system comprises a turbine, a SCR system body and a turbine front-back switching device; when the initial temperature of airflow is higher than a set value, the turbine front-back switching device guides engine waste gas to push the turbine to do work, then the engine waste gas is subjected to denitration treatment by virtue of the SCR system; and when the initial temperature of the air flow is lower than the set value, the turbine front-back switching device guides the engine waste gas to be subjected to denitration treatment through the SCR system, and then the processed airflow pushes the turbine to do work. According to the turbine front-back switchable SCR denitration system, the air inlet sequence of the turbine and the SCR system is switched by arranging the turbine front-back switching device so as to ensure that the engine waste gas entering the SCR system reaches the temperatureof sufficient catalytic reduction reaction, so that the catalytic reduction reaction is carried out smoothly, and the purification effect of the engine waste gas is improved.

Description

technical field [0001] The disclosure relates to the technical field of engine exhaust gas treatment, in particular to a switchable SCR denitrification system before and after the vortex. Background technique [0002] Ship transportation is an important part of the world's transportation industry. In the process of transportation, it not only consumes a lot of energy but also produces a lot of pollutants, which brings serious environmental problems. The TIER 3 Convention announced by the International Maritime Organization requires that the pollutants from ships must be reduced to a certain level, which puts forward certain requirements for post-discharge treatment technologies. SCR-Selective Catalytic Reduction technology (SCR-Selective Catalytic Reduction) is an efficient exhaust gas treatment technology, which can achieve high NO on the basis of minor changes to the machine X The conversion rate is high, and the economy is good, and it is currently recognized as the most...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/20F01N9/00
CPCF01N3/2066F01N3/208F01N9/00F01N2560/026F01N2560/06F01N2610/02F01N2610/148Y02T10/12Y02T10/40
Inventor 梁兴雨张恩兴张飞王亚军舒歌群
Owner TIANJIN UNIV
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