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Ammonia supply device, ammonia supply method and exhaust gas purification system

A waste gas purification system and equipment technology, applied in the direction of mechanical equipment, separation methods, chemical instruments and methods, etc., can solve problems such as unevenness, increased power consumption, and low-efficiency release

Inactive Publication Date: 2011-11-16
TOYOTA IND CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, non-uniform and inefficient release of NH stored in the ammonia absorber in the container 3
An attempt to solve the above problem by supplying larger power to the heater, thereby transferring the heat to the core of the ammonia absorber away from the vessel, only caused an increase in power consumption

Method used

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  • Ammonia supply device, ammonia supply method and exhaust gas purification system
  • Ammonia supply device, ammonia supply method and exhaust gas purification system
  • Ammonia supply device, ammonia supply method and exhaust gas purification system

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Embodiment Construction

[0017] Below, refer to figure 1 Turning to FIG. 4, the exhaust gas purification system according to the first preferred embodiment of the present invention is described. Such as figure 1 As shown, an exhaust gas purification system generally indicated by reference numeral 10 serves to remove harmful substances such as nitrogen oxides (NOx) contained in exhaust gas discharged from a diesel engine (not shown) as an internal combustion engine, the exhaust gas The purification system is arranged in the exhaust gas passage 11 through which the exhaust gas passes. A selective catalytic reduction (SCR) catalyst 12 for providing selective reduction of NOx contained in exhaust gas is also arranged in the exhaust gas passage 11 . The SCR catalyst 12 is made of something such as iron zeolite that has ammonia absorption with relatively high NOx catalytic conversion efficiency at a relatively low temperature.

[0018] A nitrogen oxide sensor (NOx sensor) 13 is arranged in the exhaust pa...

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Abstract

The present invention provides an ammonia supply device, an ammonia supply method and an exhaust gas purification system. The ammonia supply device includes an ammonia absorber, a conductive element, a mixture, a tank and an electrode. The ammonia absorber is in powder or granular form. Ammonia is stored in the ammonia absorber and released from the ammonia absorber. The conductive element in paste or liquid form has a conductive property and a nonreactive property with ammonia. The mixture is made by mixing the ammonia absorber and the conductive element. The tank holds the mixture. The electrode includes a pair of first and second electrode elements for applying voltage to the mixture.

Description

technical field [0001] The present invention relates to an ammonia supply system and an ammonia supply method for supplying ammonia from an ammonia absorbent, and an exhaust gas purification system using the ammonia supply system and the ammonia supply method. Background technique [0002] A NOx purification system is generally used to reduce nitrogen oxides (NOx) contained in exhaust gas discharged from an internal combustion engine installed in a vehicle. In particular, a NOx purification system for a diesel engine including a selective catalytic reduction catalyst (SCR catalyst) provided in an exhaust system of the diesel engine is used. According to the NOx purification system for diesel engines, urea used as a reducing agent is supplied to the SCR catalyst, and ammonia (NH 3 ) is absorbed and stored in the SCR catalyst used to selectively reduce NOx in the exhaust gas. [0003] In Japanese Unexamined Patent Application Publication (Translation of PCT Application) No. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/08F01N3/20B01D53/94
CPCF01N2610/02B01D2257/404B01D2255/2047F01N2610/10B01D53/9431Y02T10/24F01N2610/1406B01D53/90F01N3/208B01D53/30B01D2251/2062C01C1/006F01N2610/06Y02T10/12F01N3/28B01D53/94F01N3/20
Inventor 川崎信太郎今冈功
Owner TOYOTA IND CORP
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