Marine diesel engine scr reactor diversion device

A technology for SCR reactors and marine diesel engines, which is applied in mufflers, exhaust devices, machines/engines, etc., which can solve the problem that the catalytic capacity is not fully utilized, which affects the application of SCR systems on ships, and the axial size of the expansion cavity is large, etc. problems, to achieve the effect of improving circumferential unevenness, improving radial unevenness, and uniform flow rate

CN102852607BActive Publication Date: 2014-10-22上海齐耀环保科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2014-10-22

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Abstract

The invention relates an SCR reactor diversion device for a marine diesel engine, and belongs to the technical field of hydromechanics application. The device comprises diversion rings, diversion plates, front supporting plates and rear supporting plates. The number of the diversion rings is two or more than two, and the diversion rings are provided with conical curve surfaces and arranged front and back coaxially. The diversion plates are radially arranged on the circumferences of the diversion rings, and the diversion rings are fixed and connected into a whole through the diversion plates. The integral diversion device is fixedly mounted in an expansion cavity through the front supporting plates and rear supporting plates. The diversion rings form a multilayer curve surface structure in the expansion cavity and divide the longitudinal section of the expansion cavity into areas with different expansion angles to improve the internal flow field radial non-uniformity of the expansion cavity; and the diversion plates in slab structures divide the cross section of the expansion cavity into a plurality of areas with equal areas so as to improve the internal flow field circumferential non-uniformity of the expansion cavity.
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Description

technical field

[0001] The invention belongs to the technical field of fluid mechanics application, and in particular relates to a diversion device for an SCR reactor of a marine diesel engine. Background technique

[0002] Selective Catalytic Reduction (SCR, short for Selective Catalytic Reduction) technology is the mainstream technology for exhaust gas treatment of marine diesel engines. The uniformity of the flow field of the SCR reactor is its core technology. If the flow rate of exhaust gas entering the catalyst pores is not uniform, part of the exhaust gas in the area with too high velocity will be discharged before it can react, and the catalytic capacity in the area with too low velocity will not be fully utilized, thereby reducing the performance of the reactor. Usually, in order to ensure uniform flow rate of the exhaust gas entering the catalyst pores, the expansion angle of the expansion chamber cannot be too large, but this will cause the axial dimension of the...

Examples

Embodiment Construction

[0016] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0017] The invention provides a diversion device for a marine diesel engine SCR reactor, as attached figure 1 As shown, it includes guide ring 8, guide plate 9, front support plate 6 and rear support plate 7, as attached Figure 6 The peripheral device shown is a diesel engine SCR reactor. The dimensions of the diesel engine SCR reactor are 1854mm×1675mm×2924mm. The inlet of the expansion chamber 3 of the diesel engine SCR reactor is connected to the circular chamber 1 of Φ600mm, and the outlet is connected to the square chamber 4 of 1500mm×1140mm. The catalyst 5 is built in the square cavity, and the expansion ratio of the expansion cavity 3 is 6. If a small expansion angle is used, the length of the expansion cavity will exceed 1000mm. Due to actual needs, the length of the expansion cavity 3 is required to be controlled at about 400mm, and the expansion...