Diesel engine particle filtering device with back flushing function

Abstract

The invention discloses a diesel engine particle filtering device with a back flushing function. The diesel engine particle filtering device comprises a DPF packaging assembly; the exhaust manifold comprises an exhaust collecting pipe connected with the air inlet and an air outlet pipe connected with the air outlet; a first valve is installed in the exhaust collecting pipe, and a second valve is installed in the air outlet pipe. One end of the first bypass pipeline communicates with the exhaust collecting pipe, and the other end of the first bypass pipeline communicates with the DPF packaging assembly; one end of the second bypass pipeline communicates with the air outlet pipe, and the other end of the second bypass pipeline communicates with the DPF packaging assembly; one end of the second bypass pipeline and the air outlet are located on the two sides of the second valve respectively. And a fourth valve is mounted in the second bypass pipeline. The DPF carrier is cleaned through power of engine exhaust, external heat energy is not needed, and energy consumption cannot be remarkably increased.

Description

Technical Field

[0001] The invention belongs to the technical field of exhaust gas treatment, and relates to a diesel engine particle filter device, in particular to a diesel engine particle filter device with a back-blowing function. Background Art

[0002] The exhaust emissions of the engine laboratory must meet the GB16297-1996 "Comprehensive Emission Standards for Air Pollutants". Among them, particulate matter needs to use a DPF (particulate filter) carrier to filter the black smoke in the exhaust. The exhaust treatment of the engine laboratory is an engineering project, and its exhaust filter device is very large; when the filter device is blocked, it needs to be manually removed and cleaned, which is time-consuming and difficult.

[0003] The Chinese invention patent with application number 201510887351.3 discloses a diesel engine particulate filter vehicle-mounted ash removal system, including an engine, a particulate filter, an air compressor, a filter device, a pressure sensor, an engine ECU, an exhaust connection pipe and a control valve, wherein the air compressor and the filter device are connected to the downstream and upstream of the particulate filter in the engine exhaust system through the exhaust connection pipe and the control valve, and the air compressor and the control valve are controlled by the engine ECU through the wiring harness, and the air compressor provides a back-blowing high-pressure airflow to remove the non-combustible ash filtered in the particulate filter, and the removed ash will be collected by the filter device. The patent can effectively eliminate the deterioration effect of ash on the working performance of the particulate filter by adding an air compressor, an exhaust connection pipe and a control valve to cooperate with the particulate filter, and at the same time prevent the ash material from clogging the particulate filter and prolonging the life of the particulate filter; however, the additional air compressor structure is not only not conducive to the spatial layout of the engine exhaust system, but also significantly increases the energy consumption c. Summary of the invention

[0004] The object of the present invention is to provide a diesel engine particulate filter device with a back-flushing function, which does not require manual removal and does not significantly increase the occupied space and energy consumption.

[0005] To achieve the above object, the present invention provides the following technical solution: a diesel engine particulate filter device with back-blowing function, comprising: A DPF packaging component, wherein the DPF packaging component has an air inlet and an air outlet and a DPF carrier is disposed therein; An exhaust manifold, the exhaust manifold comprising an exhaust collecting pipe connected to the air inlet and an exhaust pipe connected to the air outlet; a first valve is installed in the exhaust collecting pipe, and a second valve is installed in the exhaust pipe; a first bypass line, one end of which is connected to the exhaust gas collecting pipe and the other end of which is connected to the DPF packaging assembly; one end and the other end of the first bypass line are located on both sides of the DPF carrier, one end of the first bypass line and the air inlet are respectively located on both sides of the first valve; a third valve is installed in the first bypass line; a second bypass line, one end of which is connected to the air outlet pipe and the other end of which is connected to the DPF packaging assembly; one end and the other end of the second bypass line are located on both sides of the DPF carrier, one end of the second bypass line and the air outlet are located on both sides of the second valve respectively; a fourth valve is installed in the second bypass line; The diesel particulate filter device with back-blowing function has a normal state and a back-blowing state: When in a normal state, the first valve and the second valve are both in an open state, and the third valve and the fourth valve are both in a closed state; When in the back-blowing state, the first valve and the second valve are both in the closed state, and the third valve and the fourth valve are both in the open state.

[0006] Optimally, it also includes: A plurality of exhaust components are provided, each exhaust component comprising an exhaust branch pipe connected to the locomotive engine and communicated with the exhaust collecting pipe, and a one-way valve installed in the exhaust branch pipe.

[0007] Optimally, it also includes: A dust collecting bag is connected to the air outlet pipe through a pipeline; a fifth valve is installed in the pipeline.

[0008] Furthermore, a sixth valve is installed in the air outlet pipe, and the second valve and the sixth valve are respectively located on both sides of one end of the second bypass pipeline.

[0009] Furthermore, the connection point between the pipeline and the air outlet pipe is located between the second valve and the sixth valve.

[0010] Furthermore, it also includes a temperature sensor and a pressure sensor installed in the exhaust gas collecting pipe, and the temperature sensor and the pressure sensor are both located upstream of the first valve.

[0011] Furthermore, it also includes cables respectively connected to the temperature sensor, the pressure sensor, the first valve, the second valve, the third valve, the fourth valve, the sixth valve and the fifth valve, and an HMI control cabinet connected to the cables.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: the diesel engine particulate filter device with back-blowing function of the present invention adds a first bypass line and a second bypass line to the exhaust manifold and cooperates with respective valves, so that after the DPF carrier is blocked, there is no need to manually remove the carrier, and back-blowing can be achieved through the cooperation of the valve and the bypass pipe, so that the carbon particles accumulated in the DPF can be cleaned; and the power of the engine exhaust itself is used to clean the DPF carrier, without the need for external heat energy, and will not significantly increase energy consumption; adding a dust bag structure can prevent secondary pollution during cleaning and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of a diesel engine particulate filter device with back-blowing function according to the present invention; Figure 2 It is a schematic structural diagram of a diesel engine particulate filter device with back-blowing function in a normal state according to the present invention; Figure 3 It is a schematic structural diagram of a diesel engine particulate filter device with back-flushing function in a back-flushing state according to the present invention. DETAILED DESCRIPTION

[0014] The preferred embodiments of the present invention will be described in detail below.

[0015] like Figure 1 The diesel particulate filter device with back-blowing function shown in the figure mainly comprises a DPF packaging assembly 1, an exhaust manifold 2, a first bypass pipeline 4, a second bypass pipeline 5 and other structures that match each other.

[0016] The DPF packaging assembly 1 has an air inlet 11 and an air outlet 12, and a DPF carrier 101 is arranged therein, which is mainly used to filter particulate matter PM in the exhaust gas discharged by the locomotive engine 1' in the laboratory.

[0017] The exhaust manifold 2 includes an exhaust collecting pipe 21 connected to the air inlet 11 and an exhaust pipe 22 connected to the air outlet 12, a first valve 211 is installed in the exhaust collecting pipe 21, and a second valve 221 is installed in the exhaust pipe 22; in this embodiment, the diesel particulate filter device with back-blowing function also includes multiple exhaust components 3 (specifically two groups in this application, and the two exhaust components 3 are arranged in parallel), each exhaust component 3 includes an exhaust branch pipe 31 connected to the locomotive engine 1' and connected to the exhaust collecting pipe 21, and a one-way valve 32 installed in the exhaust branch pipe 31. The exhaust manifold 2 is usually installed on the top of the laboratory beam, and is used for the collection of the engine exhaust branches (i.e., the aforementioned exhaust collecting pipe 21) of each engine test room; a high-temperature resistant exhaust one-way valve (i.e., one-way valve 32) is installed on the exhaust branch pipe (i.e., the exhaust collecting pipe 21) of each test room to prevent the engine exhaust from flowing back when the engine bench in some test rooms is not working.

[0018] A third valve 41 is installed in the first bypass line 4, one end of which is connected to the exhaust collection pipe 21, and the other end of which is connected to the DPF package assembly 1, so that one end and the other end of the first bypass line 4 are located on both sides of the DPF carrier 101, and one end of the first bypass line 4 and the air inlet 11 are located on both sides of the first valve 211. At this time, the first bypass line 4 is connected to the exhaust manifold 2 and the DPF package assembly 1; the inlet of the first bypass line 4 is placed on the exhaust manifold and is located in front of the first valve 211 (i.e., upstream, where the definitions of upstream and downstream are based on Figure 2 The outlet of the first bypass line 4 is disposed on the DPF packaging assembly 1 and is located at the rear side (ie, downstream) of the DPF carrier 101 .

[0019] A fourth valve 51 is installed in the second bypass line 5, one end of which is connected to the outlet pipe 22, and the other end of which is connected to the DPF packaging assembly 1, so that one end and the other end of the second bypass line 5 are located on both sides of the DPF carrier 101, and one end of the second bypass line 5 and the outlet 12 are respectively located on both sides of the second valve 221. At this time, the second bypass line 5 is connected to the DPF packaging assembly 1 and the exhaust manifold 2, the inlet of the second bypass line 5 is placed on the exhaust manifold 2 and located in front of the sixth valve 222, and the outlet of the second bypass line 5 is placed on the DPF packaging assembly 1 and located in front of the DPF carrier 101.

[0020] In this embodiment, the diesel particulate filter device with back-blowing function further includes a dust bag 6, which is connected to the exhaust pipe 22 through a pipeline, and a fifth valve 61 is installed in the pipeline. That is, the dust bag 6 is placed on the exhaust manifold 2 and is located near the tail of the DPF packaging assembly 1. The diesel particulate filter device with back-blowing function has a normal state and a back-blowing state. When it is in the normal state, the dust bag 6 does not need to be installed; when it enters the back-blowing state, the dust bag 6 needs to be installed to collect particulate matter in the DPF carrier 101.

[0021] In this embodiment, a sixth valve 222 is further installed in the air outlet pipe 22 , the second valve 221 and the sixth valve 222 are respectively located on both sides of one end of the second bypass pipeline 5 , and the connection between the pipeline and the air outlet pipe 22 is located between the second valve 221 and the sixth valve 222 .

[0022] The diesel particulate filter device with back-blowing function further includes a temperature sensor 7 and a pressure sensor 8 installed in the exhaust collecting pipe 21. The temperature sensor 7 and the pressure sensor 8 are both located upstream of the first valve 211 and are respectively used to monitor the exhaust temperature and the exhaust pressure before the DPF packaging assembly 1. The cable 9 can be respectively connected to the temperature sensor 7, the pressure sensor 8, the first valve 211, the second valve 221, the third valve 41, the fourth valve 51, the sixth valve 222 and the fifth valve 61, and the cable 9 is connected to the HMI control cabinet 10, so that the HMI control cabinet 10 is used to collect and monitor the data of the temperature sensor 7 and the pressure sensor 8, and the switch status of the first valve 211, the second valve 221, the third valve 41, the fourth valve 51, the fifth valve 61 and the sixth valve 222.

[0023] The diesel particulate filter with backflush function has a normal state and a backflush state. When in the normal state (such as Figure 2 As shown in the figure), the first valve 211, the second valve 221 and the sixth valve 222 are all in the open state, and the third valve 41, the fourth valve 51 and the fifth valve 61 are all in the closed state. The engine exhaust passes through the exhaust manifold 2 and the DPF carrier 101 to filter out the black smoke, and then flows out of the tail pipe after purification. After a period of time, when the carbon particles in the DPF carrier 101 are fully collected, the pressure difference before and after the DPF carrier 101 will increase, and the HMI control cabinet 10 will display that the pressure value exceeds the standard and prompt an alarm sound. At this time, it is necessary to manually start the control switch (located on the HMI control cabinet) to start the backflush program. When in the backflush state (such as Figure 3 As shown), the first valve 211, the second valve 221 and the sixth valve 222 are all in a closed state, and the third valve 41, the fourth valve 51 and the fifth valve 61 are all in an open state. Increase the engine speed, increase the exhaust pressure, and use the kinetic energy of the engine airflow to blow out the carbon particles collected in the DPF carrier 101 and collect them in the dust bag 6; the carbon particles in the dust bag 6 can be treated by centralized environmental protection to avoid secondary pollution. It can be seen that the diesel engine particulate filter device with back-blowing function of the present application does not require manual removal of the DPF carrier 101. It can be put in a back-blowing state to clean up the carbon particles accumulated in the DPF, and use the power of the engine exhaust itself to clean the DPF carrier. No external heat energy is required, and energy consumption will not be significantly increased; adding a dust bag structure can prevent secondary pollution during cleaning and maintenance.

[0024] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A diesel particulate filter device with back-flushing function, characterized in that: It includes: A DPF packaging component (1), the DPF packaging component (1) having an air inlet (11) and an air outlet (12) and a DPF carrier (101) arranged therein; An exhaust manifold (2), the exhaust manifold (2) comprising an exhaust collection pipe (21) connected to the air inlet (11) and an exhaust pipe (22) connected to the exhaust outlet (12); a first valve (211) is installed in the exhaust collection pipe (21), and a second valve (221) is installed in the exhaust pipe (22); a first bypass pipeline (4), one end of the first bypass pipeline (4) being connected to the exhaust gas collecting pipe (21) and the other end of the first bypass pipeline (4) being connected to the DPF packaging assembly (1); one end and the other end of the first bypass pipeline (4) being located on both sides of the DPF carrier (101); one end of the first bypass pipeline (4) and the air inlet (11) being located on both sides of the first valve (211) respectively; and a third valve (41) being installed in the first bypass pipeline (4); a second bypass pipeline (5), one end of the second bypass pipeline (5) being connected to the air outlet pipe (22) and the other end of the second bypass pipeline (5) being connected to the DPF packaging assembly (1); one end and the other end of the second bypass pipeline (5) being located on both sides of the DPF carrier (101); one end of the second bypass pipeline (5) and the air outlet (12) being located on both sides of the second valve (221) respectively; and a fourth valve (51) being installed in the second bypass pipeline (5); The diesel particulate filter device with back-blowing function has a normal state and a back-blowing state: When in a normal state, the first valve (211) and the second valve (221) are both in an open state, and the third valve (41) and the fourth valve (51) are both in a closed state; When in the back-blowing state, the first valve (211) and the second valve (221) are both in a closed state, and the third valve (41) and the fourth valve (51) are both in an open state.

2. The diesel particulate filter device with back-flushing function according to claim 1, characterized in that: It also includes: A plurality of exhaust components (3), each exhaust component (3) comprising an exhaust branch pipe (31) connected to a locomotive engine (1') and in communication with the exhaust collecting pipe (21), and a one-way valve (32) installed in the exhaust branch pipe (31).

3. The diesel particulate filter device with back-flushing function according to claim 1, characterized in that: It also includes: A dust collecting bag (6), the dust collecting bag (6) being connected to the air outlet pipe (22) via a pipeline; a fifth valve (61) is installed in the pipeline.

4. The diesel particulate filter device with back-flushing function according to claim 3, characterized in that: A sixth valve (222) is also installed in the air outlet pipe (22), and the second valve (221) and the sixth valve (222) are respectively located on both sides of one end of the second bypass pipeline (5).

5. The diesel particulate filter device with back-flushing function according to claim 4, characterized in that: The connection point between the pipeline and the air outlet pipe (22) is located between the second valve (221) and the sixth valve (222).

6. The diesel particulate filter device with back-flushing function according to claim 5, characterized in that: It also includes a temperature sensor (7) and a pressure sensor (8) installed in the exhaust gas collecting pipe (21), wherein the temperature sensor (7) and the pressure sensor (8) are both located upstream of the first valve (211).

7. The diesel particulate filter device with back-flushing function according to claim 6, characterized in that: It also includes a cable (9) connected to the temperature sensor (7), the pressure sensor (8), the first valve (211), the second valve (221), the third valve (41), the fourth valve (51), the sixth valve (222) and the fifth valve (61) respectively, and an HMI control cabinet (10) connected to the cable (9).

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