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Reactor

A technology for reactors and changing parts, applied in the field of reactors, can solve problems such as difficulty in ensuring safety, and achieve the effects of avoiding temperature drop, reducing the amount of addition, and improving activity

Inactive Publication Date: 2019-11-12
HINO MOTORS LTD
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  • Abstract
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  • Claims
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Problems solved by technology

[0003] On the other hand, in the field of industrial flue gas denitrification treatment in factories and the like, ammonia (NH 3 ) The effectiveness of the method of reducing and purifying NOx has been widely known, but in the case of automobiles, it is difficult to ensure safety when driving with ammonia itself, so the use of urea water as a reducing agent has been proposed

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Embodiment Construction

[0028] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0029] figure 2 It is a figure showing one embodiment of the present invention. In this embodiment, an example of application to an exhaust gas purification device as described in detail below is shown, more specifically, an exhaust gas purification system equipped with a communication flow path 7 The device is an example in which the reactor 8 is installed at the flow changing part at the most upstream part of the communication flow path 7 as an application site. On the way, the particulate filter 3 that traps particulates in the exhaust gas 1 and the selective reduction catalyst 4 are arranged in parallel by housings 5 ​​and 6, respectively. 4 On the downstream side of the particulate filter 3, it has the property of selectively reacting NOx and ammonia even under the coexistence of oxygen; The gas 1 is turned back in the opposite direction and introduced to the in...

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Abstract

The present invention relates to a reactor 8 which is installed in a gas collection chamber 7A (flow change part) through which exhaust gas 1 of an exhaust system flows in a meandering manner and which is configured so as to be impinged on by a spray of urea water 10 (additive) sprayed from the upstream side of the reactor and receive heat therefrom so as to promote vaporization of the spray of urea water 10. The reactor is provided with: a plurality of flow straightening vanes 12 which are arranged along a direction substantially bisecting an angle formed by an exhaust gas 1 inflow direction(refer to the x arrow) and outflow direction (refer to the y arrow) and which are installed in an orientation aligned with the exhaust gas 1 flow; and a support body 13 which is housed inside the gascollection chamber 7A with the flow straightening vanes 12 supported thereon. Each of the flow straightening vanes 12 is supported by the support body 13 so as to be spaced away from flow path walls of the gas collection chamber 7A.

Description

technical field [0001] The present invention relates to a reactor in which gasification is promoted by heating by colliding sprays of additives injected from an upstream side. Background technique [0002] Conventionally, in diesel engines, there has been a structure in which an optional valve having the property of selectively reacting NOx (nitrogen oxides) with a reducing agent even in the presence of oxygen is installed in the middle of the exhaust pipe through which the exhaust gas flows. Prototype catalyst: A required amount of reducing agent is added to the upstream side of the selective reduction type catalyst, and the reducing agent reacts with NOx in the exhaust gas on the selective reduction type catalyst, thereby reducing the emission concentration of NOx. [0003] On the other hand, in the field of industrial flue gas denitrification treatment in factories and the like, ammonia (NH 3 ) The effectiveness of the method of reducing and purifying NOx has been widely...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/24B01D53/94F01N3/08
CPCB01D53/9477B01D53/90B01D2251/2067B01D53/9431F01N2610/1453F01N2610/02F01N3/2892F01N3/2066B01F23/2132B01F25/3131B01F25/4315Y02T10/12F01N3/28F01N2240/20
Inventor 真弓雅彦鹤田智之
Owner HINO MOTORS LTD
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