An exhaust aftertreatment device for an explosion-proof diesel engine

Abstract

The utility model relates to a kind of tail gas aftertreatment device for explosion-proof diesel engine, it includes shell, tail gas treatment subassembly and support;The outer wall of the shell is equipped with the air inlet and the gas outlet being communicated with its inside;The tail gas treatment subassembly is fixedly arranged in the shell, and the tail gas treatment subassembly is spaced apart from the inner wall of the shell, the air inlet of the tail gas treatment subassembly is communicated with the air inlet of the shell, the gas outlet of the tail gas treatment subassembly is communicated with the gas outlet of the shell;The bottom of support is fixedly connected with the shell, and the top of support is connected with the tail gas treatment subassembly;Tail gas treatment subassembly in shell is spaced apart from the inner wall of shell, flue gas introduced via air inlet is discharged from gas outlet after being treated via tail gas treatment subassembly, and the high-temperature gas flowing through shell can increase the temperature of shell, however, shell is spaced apart from tail gas treatment subassembly, which can avoid high-temperature shell damaging tail gas treatment subassembly.

Description

Technical Field

[0001] This utility model relates to the field of exhaust gas treatment technology, and in particular to an exhaust gas aftertreatment device for explosion-proof diesel engines. Background Technology

[0002] Exhaust gas aftertreatment devices are key technological equipment installed in the emission systems of motor vehicles or industries to reduce the emission of harmful gases and particulate matter.

[0003] For example, the exhaust gas aftertreatment device proposed in invention application CN202311647536.8 has a cylindrical shell and a metal carrier with a mesh structure. The outer circumferential surface of the carrier is fixedly connected to the inner circumferential wall of the shell. The carrier includes a DOC zone, a DPF zone, an SCR zone, and an ASC zone, which are sequentially connected and interconnected. High-temperature exhaust gas from the engine enters the interior of the shell axially through the inlet, then diffuses into the DOC zone. Through the turbulent effect of the densely arranged wire mesh carrier, the high-temperature exhaust gas uniformly enters the pores of the wire mesh and reacts with the coating on the carrier to eliminate solid particles such as carbon particles and unburned hydrocarbons in the airflow, effectively increasing the heat exchange area and efficiency, and ensuring uniform mixing.

[0004] However, the carrier comes into contact with the inner wall of the shell, resulting in a very high temperature in the shell, which can cause the catalytic coating to sinter, reduce conversion efficiency, and make it impossible to effectively treat the exhaust gas. Utility Model Content

[0005] In view of this, it is necessary to provide an exhaust gas aftertreatment device for explosion-proof diesel engines to solve the problem that the contact between the carrier and the inner wall of the housing results in a very high temperature of the housing, which causes the catalytic coating to sinter, reduces the conversion efficiency, and fails to effectively treat the exhaust gas.

[0006] This utility model provides an exhaust gas aftertreatment device for an explosion-proof diesel engine, including a housing, an exhaust gas treatment component, and a bracket; the outer wall of the housing has an air inlet and an air outlet communicating with its interior; the exhaust gas treatment component is fixedly installed inside the housing, and the exhaust gas treatment component is spaced apart from the inner wall of the housing, the air inlet end of the exhaust gas treatment component is connected to the air inlet of the housing, the air outlet end of the exhaust gas treatment component is connected to the air outlet of the housing, the bottom of the bracket is fixedly connected to the housing, and the top of the bracket is connected to the exhaust gas treatment component.

[0007] Furthermore, the exhaust gas treatment assembly includes an intake manifold, a DOC module, and a DPF module. The top of the intake manifold is connected to the air inlet of the housing. The intake manifold, the DOC module, and the DPF module are arranged sequentially along the length of the housing and spaced apart from the inner wall of the housing. The top of the DPF module is connected to the air outlet of the housing.

[0008] Furthermore, the top of the air intake cylinder is provided with a first opening that communicates with the air inlet of the outer casing, and the side wall of the air intake cylinder facing the DOC module is provided with a second opening. Both the first opening and the second opening are connected to the interior of the air intake cylinder.

[0009] Furthermore, it also includes thermal insulation cotton, which is laid on the inner wall of the outer shell.

[0010] Furthermore, the heat insulation cotton is positioned directly opposite the air intake cylinder.

[0011] Furthermore, the bracket includes a connecting screw and a U-shaped frame, the bottom end of the connecting screw being fixedly connected to the housing, and the top of the U-shaped frame being open and fixedly connected to the bottom of the exhaust gas treatment assembly.

[0012] Furthermore, there are multiple brackets, which are arranged sequentially along the length of the exhaust gas treatment assembly.

[0013] Furthermore, it also includes multiple supporting base plates, which are arranged sequentially along the length of the outer shell and are all fixedly connected to the bottom of the outer shell.

[0014] Furthermore, it also includes multiple lateral support plates, and each of the supporting base plates has two lateral support plates arranged opposite each other on its top, with the opposite sides of the two lateral support plates abutting against the two sides of the outer shell respectively.

[0015] Furthermore, it also includes a sensing component installed within the housing for monitoring pressure and temperature within the housing.

[0016] Compared with the prior art, the exhaust gas treatment component located inside the housing is spaced apart from the inner wall of the housing. The flue gas introduced through the air inlet is treated by the exhaust gas treatment component and then discharged from the air outlet. The high temperature gas flowing through the housing will cause the temperature of the housing to rise. However, the spaced arrangement between the housing and the exhaust gas treatment component can prevent the high temperature housing from damaging the exhaust gas treatment component. Attached Figure Description

[0017] Figure 1 A schematic diagram of the overall external structure of the exhaust gas aftertreatment device for an explosion-proof diesel engine provided in an embodiment of this utility model;

[0018] Figure 2 A schematic diagram of the overall internal structure of the exhaust gas aftertreatment device for an explosion-proof diesel engine provided in this embodiment of the present invention;

[0019] Figure 3 for Figure 1 Schematic diagram of the arrangement of the insulation cotton. Detailed Implementation

[0020] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0021] like Figure 1-2 As shown, the present invention provides an exhaust gas aftertreatment device for an explosion-proof diesel engine, comprising a housing 100, an exhaust gas treatment component 200, and a bracket 240; the outer wall of the housing 100 has an air inlet 110 and an air outlet 120 communicating with its interior; the exhaust gas treatment component 200 is fixedly disposed inside the housing 100, and the exhaust gas treatment component 200 is spaced apart from the inner wall of the housing 100, the air inlet end of the exhaust gas treatment component 200 is connected to the air inlet 110 of the housing 100, and the air outlet end of the exhaust gas treatment component 200 is connected to the air outlet 120 of the housing 100; the bottom of the bracket 240 is fixedly connected to the housing 100, and the top of the bracket 240 is connected to the exhaust gas treatment component 200.

[0022] In practice, the exhaust gas treatment component 200 located inside the housing 100 is spaced apart from the inner wall of the housing 100. The flue gas introduced through the air inlet 110 is treated by the exhaust gas treatment component 200 and discharged from the air outlet 120. The high temperature gas flowing through the housing 100 will cause the temperature of the housing 100 to rise. However, the housing 100 and the exhaust gas treatment component 200 are spaced apart to avoid the high temperature housing 100 from damaging the exhaust gas treatment component 200.

[0023] In this embodiment, the outer casing 100 is an explosion-proof casing 100, which provides a stable space for the reaction treatment of exhaust gas.

[0024] To improve the stability of the device installation, in one embodiment, the device further includes a plurality of support base plates 130, which are arranged sequentially along the length of the housing 100 and are all fixedly connected to the bottom of the housing 100.

[0025] This embodiment also includes multiple lateral support plates 140. Each support base plate 130 has two lateral support plates 140 arranged opposite each other on its top. The opposite sides of the two lateral support plates 140 abut against the two sides of the outer shell 100, respectively.

[0026] The exhaust gas treatment assembly 200 in this embodiment is used to treat exhaust gas. In one embodiment, the exhaust gas treatment assembly 200 includes an intake manifold 210, a DOC module 220, and a DPF module 230. The top of the intake manifold 210 is connected to the air inlet 110 of the housing 100. The intake manifold 210, the DOC module 220, and the DPF module 230 are arranged sequentially along the length of the housing 100 and spaced apart from the inner wall of the housing 100. The top of the DPF module 230 is connected to the air outlet 120 of the housing 100.

[0027] The top of the air intake cylinder 210 is provided with a first opening that communicates with the air inlet 110 of the outer casing 100, and the side wall of the air intake cylinder 210 facing the DOC module 220 is provided with a second opening. Both the first opening and the second opening are connected to the interior of the air intake cylinder 210.

[0028] like Figure 3 As shown, to prevent the outer casing 100 from overheating, this embodiment also includes heat insulation cotton 300, which is laid on the inner wall of the outer casing 100. The heat insulation cotton 300 is positioned directly opposite the air intake 210. This effectively ensures that the exhaust gas enters the DOC module 220 at a high temperature, which is beneficial for the catalytic oxidation reaction of the exhaust gas and ensures that the conversion efficiency of carbon monoxide in the exhaust gas reaches over 90%.

[0029] The harmful hydrocarbon gases emitted by the engine first pass through the front-end DOC module 220, where the hydrocarbons in the exhaust gas are catalytically oxidized into carbon dioxide and water under high temperature conditions. Then, when passing through the rear-end DPF module 230, the black smoke particles emitted by the engine are collected.

[0030] To facilitate the suspension of the exhaust gas treatment component 200 within the housing 100, this embodiment also includes a bracket 240, the bottom of which is fixedly connected to the housing 100, and the top of which is connected to the exhaust gas treatment component 200.

[0031] In one embodiment, the bracket 240 includes a connecting screw 241 and a U-shaped bracket 242, the bottom end of the connecting screw 241 being fixedly connected to the housing 100, and the top of the U-shaped bracket 242 being open and fixedly connected to the bottom of the exhaust gas treatment assembly 200.

[0032] In one embodiment, there are multiple supports 240, which are arranged sequentially along the length of the exhaust gas treatment assembly 200.

[0033] This embodiment also includes a sensing component 400, which is installed inside the housing 100 and used to monitor the pressure and temperature inside the housing 100. The sensing component 400 includes a differential pressure sensor 410 and a temperature sensor 420 installed on the inner wall of the housing 100. When the differential pressure sensor 410 detects that the pressure exceeds a set value, the engine control module will adjust relevant parameters such as the advance angle, rail pressure, and fuel injection quantity to forcibly burn off the collected black smoke particles, thereby achieving the requirement to reduce PM in the exhaust gas.

[0034] Compared with the prior art: The exhaust gas treatment component 200 located inside the housing 100 is spaced apart from the inner wall of the housing 100. The flue gas introduced through the air inlet 110 is treated by the exhaust gas treatment component 200 and discharged from the air outlet 120. The high temperature gas flowing through the housing 100 will raise the temperature of the housing 100. However, the housing 100 and the exhaust gas treatment component 200 are spaced apart, which can prevent the high temperature housing 100 from damaging the exhaust gas treatment component 200.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A tail gas aftertreatment device for an explosion-proof diesel engine, characterized in that, include: The outer casing has an air inlet and an air outlet on its outer wall that connect to the interior. An exhaust gas treatment component is fixedly disposed inside the housing, and the exhaust gas treatment component is spaced apart from the inner wall of the housing. The air inlet end of the exhaust gas treatment component is connected to the air inlet of the housing, and the air outlet end of the exhaust gas treatment component is connected to the air outlet of the housing. The bracket has its bottom fixedly connected to the housing, and its top is connected to the exhaust gas treatment assembly.

2. The exhaust gas aftertreatment device for explosion-proof diesel engines according to claim 1, characterized in that, The exhaust gas treatment assembly includes an intake cylinder, a DOC module, and a DPF module. The top of the intake cylinder is connected to the air inlet of the housing. The intake cylinder, the DOC module, and the DPF module are arranged sequentially along the length of the housing and spaced apart from the inner wall of the housing. The top of the DPF module is connected to the air outlet of the housing.

3. The exhaust gas aftertreatment device for an explosion-proof diesel engine according to claim 2, characterized in that, The top of the air intake cylinder is provided with a first opening that communicates with the air inlet of the outer casing, and a second opening is provided on the side wall of the air intake cylinder facing the DOC module. Both the first opening and the second opening are connected to the interior of the air intake cylinder.

4. The exhaust gas aftertreatment device for an explosion-proof diesel engine according to claim 3, characterized in that, It also includes thermal insulation cotton, which is laid on the inner wall of the outer shell.

5. The exhaust gas aftertreatment device for an explosion-proof diesel engine according to claim 4, characterized in that, The heat insulation cotton is positioned directly opposite the air inlet cylinder.

6. The exhaust gas aftertreatment device for an explosion-proof diesel engine according to claim 1, characterized in that, The bracket includes a connecting screw and a U-shaped frame. The bottom end of the connecting screw is fixedly connected to the housing, and the top of the U-shaped frame is open and fixedly connected to the bottom of the exhaust gas treatment assembly.

7. The exhaust gas aftertreatment device for an explosion-proof diesel engine according to claim 1, characterized in that, The number of brackets is multiple, and the multiple brackets are arranged sequentially along the length direction of the exhaust gas treatment assembly.

8. The exhaust gas aftertreatment device for an explosion-proof diesel engine according to claim 1, characterized in that, It also includes multiple supporting base plates, which are arranged sequentially along the length of the outer shell and are all fixedly connected to the bottom of the outer shell.

9. The exhaust gas aftertreatment device for an explosion-proof diesel engine according to claim 8, characterized in that, It also includes multiple lateral support plates, and each of the support base plates has two lateral support plates arranged opposite each other on its top. The opposite sides of the two lateral support plates abut against the two sides of the outer shell, respectively.

10. The exhaust gas aftertreatment device for an explosion-proof diesel engine according to claim 1, characterized in that, It also includes a sensing component installed inside the housing for monitoring pressure and temperature inside the housing.

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