Silencing type tail gas filtering device for diesel generating set

Abstract

The utility model relates to the field of tail gas filtering of diesel generating sets, and discloses a silencing type tail gas filtering device for a diesel generating set, which comprises a silencing pipe, a gas inlet pipe communicated with the silencing pipe to introduce tail gas, and a gas outlet pipe communicated with the silencing pipe to discharge gas, the tail gas filtering device further comprises a DOC module installed in the hush pipe and used for catalyzing tail gas reaction, a DPF module installed in the hush pipe and used for filtering soot particles, and an online monitoring module installed in the hush pipe and used for monitoring filtered gas. A combustion regeneration assembly for treating tail gas is arranged in the silencing pipe; the tail gas filtering device can uniformly control oil liquid and oxygen to enter the silencing pipe to assist in completing combustion regeneration operation, and the tail gas combustion treatment efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the diesel generating set tail gas filter field, concretely relates to a kind of muffling type tail gas filter device for diesel generating set. BACKGROUND

[0002] The tail gas emission of diesel generating set has great harm to environment and human health, and diesel tail gas contains various harmful substances such as nitrogen oxides, particulate matter, carbon monoxide, sulfide and polycyclic aromatic hydrocarbons. Direct emission of tail gas causes air pollution and can cause respiratory diseases in human body. The installation of particulate trap at the tail gas emission pipe can filter and treat most harmful substances and reduce the harm of tail gas emission.

[0003] Chinese patent CN212130583U discloses a particulate trap, which comprises a filter carrier and a filter membrane arranged at the end of the filter carrier. The filter carrier is internally provided with a hole, one end of which is open, and the other end is plugged, and the wall of the hole is provided with filter micropores. The filter membrane is provided with filter holes, and the pore size of the filter holes is smaller than that of the filter micropores.

[0004] According to the above-mentioned patent, the particulate matter in the tail gas is filtered by the filter membrane. When the vehicle runs to the condition of high exhaust temperature, the temperature is sufficient to burn the filter membrane, and the particles generated after the burning of the filter membrane are trapped by the filter carrier, so as to maintain the continuous filtering function of the filter. However, in the existing combustion regeneration process, the direction of combustion temperature and oxygen input is relatively single, which is not conducive to the rapid and uniform combustion regeneration of the filtered tail gas particles in the particulate trap, and affects the tail gas treatment efficiency. SUMMARY

[0005] In view of the above problems, a muffling type tail gas filter device for diesel generating set is provided, which uniformly controls the temperature and oxygen in the tail gas filter device through the combustion regeneration assembly. The problem of single direction of combustion temperature and oxygen input in the combustion regeneration process, which is not conducive to the rapid and uniform combustion regeneration of the filtered tail gas particles in the particulate trap, and affects the tail gas treatment efficiency, is solved.

[0006] To solve the problems in the prior art, the utility model provides a muffling type tail gas filter device for diesel generating set, which comprises a muffling pipe, an air inlet pipe through which tail gas is transmitted into the muffling pipe, and an air outlet pipe through which gas is transmitted out of the muffling pipe. The tail gas filter device further comprises a DOC module installed in the muffling pipe for catalyzing tail gas reaction, a DPF module installed in the muffling pipe for filtering soot particles, and an online monitoring module installed in the muffling pipe for monitoring filtered gas. The muffling pipe is provided with a combustion regeneration assembly for treating tail gas.

[0007] Preferably, the combustion regeneration assembly comprises an oil injection pipe mounted on the muffler pipe, and an oxygen pipe connected to the muffler pipe, and a fixed ring pipe connected through the oil injection pipe and the oxygen pipe, and the fixed ring pipe is fixedly installed in the muffler pipe, and a movable ring pipe is slidably connected in the fixed ring pipe; the movable ring pipe is rotatably provided with an oil inlet, and the movable ring pipe is further rotatably provided with an air inlet.

[0008] Preferably, the muffler pipe is provided with a rotating assembly for controlling the sliding of the movable ring pipe in the fixed ring pipe.

[0009] Preferably, the rotating assembly comprises a driven rotating rod fixed to the movable ring pipe, a rotating ring rotatably mounted on the air inlet pipe, a main power rotating rod fixed to the rotating ring, a secondary power rotating rod fixedly connected to the rotating ring, and a push rod rotatably connected to the main power rotating rod and the secondary power rotating rod, and the push rod is rotatably connected to the driven rotating rod.

[0010] Preferably, the muffler pipe is fixedly provided with an electrically-driven lifting rod, and the output end of the electrically-driven lifting rod is fixedly provided with a lifting block, and the muffler pipe is fixedly provided with a sliding frame, and the lifting block is slidably sleeved on the sliding frame; the lifting block is rotatably provided with a positioning rod, and the positioning rod is rotatably connected to the main power rotating rod.

[0011] Preferably, the muffler pipe is fixedly connected with a fixed ring, and the fixed ring is fixedly provided with an inner gear ring, and the inner gear ring is meshingly connected with an outer gear ring, and the outer gear ring is fixedly installed on the oil inlet and the air inlet.

[0012] Preferably, the online monitoring module comprises a pressure difference sensor fixed in the muffler pipe for monitoring the gas, a temperature sensor fixedly installed in the muffler pipe for monitoring the gas, a display installed outside the muffler pipe, a data transmission module installed outside the muffler pipe for transmitting detection values, and a GPS module installed outside the muffler pipe for positioning the geographical position of the automobile.

[0013] Preferably, the muffler pipe is externally sleeved with a heat preservation pipe, and a plurality of heat conduction pipes are circumferentially installed in the heat preservation pipe about the axis of the heat preservation pipe, and one end of the heat conduction pipe penetrates through the muffler pipe.

[0014] The utility model discloses the beneficial effect compared with prior art is:

[0015] 1. The utility model discloses a combustion regeneration assembly is uniformly controlled the temperature and oxygen input in the muffler pipe, and oil injection pipe and oxygen pipe control oil and oxygen to enter the muffler pipe, and oil acts on the DOC and promotes the exhaust temperature, and makes the particle in DPF burn and reproduce, and the movable ring pipe is controlled reciprocating rotation through the rotating assembly, and the movable ring pipe reciprocating rotation is under the meshing transmission of the inner gear ring and the outer gear ring The transmission effect makes the oil inlet and the air inlet rotate, thereby expanding the oil inlet and the air inlet range, so that oil and oxygen can be uniformly input into the muffler pipe, and the tail gas filtering process is accelerated.

[0016] 2. The utility model discloses a heat preservation pipe and heat conduction pipe can absorb and recycle the heat of the sound attenuation pipe, when the burning regeneration of the filtered tail gas particle is controlled, the heat in the sound attenuation pipe is transferred to the heat conduction pipe, and the heat conduction pipe is distributed in the heat preservation pipe, so that the heat is evenly transferred to the heat preservation pipe, the heat preservation pipe is protected and arranged outside the sound attenuation pipe, under the protection, the heat consumption in the sound attenuation pipe can be reduced, the inside of the sound attenuation pipe can be kept in the persistent high temperature state, and the effect of the burning regeneration treatment of the tail gas can be kept. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a kind of sound attenuation pipe three-dimensional structure schematic diagram of diesel generating set sound attenuation type tail gas filter device.

[0018] Figure 2 It is a kind of sound attenuation pipe cross section structure schematic diagram of diesel generating set sound attenuation type tail gas filter device.

[0019] Figure 3 It is a kind of burning regeneration assembly three-dimensional structure schematic diagram of diesel generating set sound attenuation type tail gas filter device.

[0020] Figure 4 It is a kind of oil injection pipe three-dimensional structure schematic diagram of diesel generating set sound attenuation type tail gas filter device.

[0021] Figure 5 It is a kind of oxygen pipe three-dimensional structure schematic diagram of diesel generating set sound attenuation type tail gas filter device.

[0022] Figure 6 It is a kind of fixed ring pipe three-dimensional structure schematic diagram of diesel generating set sound attenuation type tail gas filter device.

[0023] Figure 7 It is a kind of moving ring pipe three-dimensional structure schematic diagram of diesel generating set sound attenuation type tail gas filter device.

[0024] Figure 8 It is a kind of outer gear ring three-dimensional structure schematic diagram of diesel generating set sound attenuation type tail gas filter device.

[0025] Figure 9 It is a kind of differential pressure sensor three-dimensional structure schematic diagram of diesel generating set sound attenuation type tail gas filter device.

[0026] Figure 10 It is a kind of heat conduction pipe three-dimensional structure schematic diagram of diesel generating set sound attenuation type tail gas filter device.

[0027] Mark in the drawing is:

[0028] 11, muffler; 12, intake pipe; 13, exhaust pipe; 21, DOC module; 22, DPF module; 23, online monitoring module; 231, differential pressure sensor; 232, temperature sensor; 233, display; 234, data transmission module; 235, GPS module; 3, combustion regeneration assembly; 31, oil injection pipe; 32, oxygen pipe; 33, fixed ring pipe; 34, moving ring pipe; 35, oil port; 36, gas port; 37, rotating assembly; 371, driven rotating rod; 372, rotating ring; 373, main power rotating rod; 374, auxiliary power rotating rod; 375, push rod; 381, electric drive lifting rod; 382, lifting block; 383, skid; 384, positioning rod; 41, fixed ring; 42, inner tooth ring; 43, outer tooth ring; 51, heat preservation pipe; 52, heat conduction pipe. DETAILED DESCRIPTION

[0029] In order to further understand the features, technical means and specific purposes and functions achieved by the present application, the present application will be described in further detail below in conjunction with the drawings and specific embodiments.

[0030] Referring to Figures 1-3 As shown in the drawings, a muffler type tail gas filtering device for a diesel generator set comprises a muffler 11, an intake pipe 12 through which tail gas is transmitted into the muffler 11, and an exhaust pipe 13 through which gas is transmitted out of the muffler 11. The tail gas filtering device further comprises a DOC module 21 installed in the muffler 11 for catalyzing tail gas reaction, a DPF module 22 installed in the muffler 11 for filtering soot particles, and an online monitoring module 23 installed in the muffler 11 for monitoring filtered gas. A combustion regeneration assembly 3 for treating tail gas is arranged in the muffler 11.

[0031] The tail gas of the diesel engine generator set enters the muffler 11 through the intake pipe 12. The tail gas is first subjected to catalytic oxidation reaction by the DOC module 21, thereby reducing the emission of pollutants such as CO and HC in the exhaust gas. At the same time, the DOC module 21 oxidizes NO in the tail gas into NO2, thereby reducing harmful components in the tail gas. The preliminarily treated tail gas enters the DPF module 22, and the soot harmful particles in the tail gas are filtered out. The filtered tail gas is discharged outward through the exhaust pipe 13. The treated tail gas emission can reduce the pollution to the environment and the harm to the human body.

[0032] However, the DPF module 22 will block the porous medium channels of the filtering structure after a long time of particulate trapping, causing the back pressure in the exhaust system to rise, thereby affecting the normal operation of the engine. The online monitoring module 23 can monitor the differential pressure in the muffler 11 in real time. According to the change of the monitoring data, the combustion regeneration assembly 3 controls the combustion and regeneration of particulate matter in the DPF module 22, thereby maintaining the smoothness of the filtering passage.

[0033] Referring to Figures 2-6As shown, the combustion regeneration assembly 3 comprises an oil injection pipe 31 mounted on the muffler pipe 11, and an oxygen pipe 32 connected to the muffler pipe 11, and a fixed ring pipe 33 connected through the oil injection pipe 31 and the oxygen pipe 32, the fixed ring pipe 33 is fixedly installed in the muffler pipe 11, and a movable ring pipe 34 is slidably connected in the fixed ring pipe 33; the movable ring pipe 34 is rotatably installed with an oil port 35, and the movable ring pipe 34 is also rotatably installed with an air port 36.

[0034] The oil and oxygen are input into the fixed ring pipe 33 through the oil injection pipe 31 and the oxygen pipe 32, the oil and oxygen in the fixed ring pipe 33 enter the movable ring pipe 34, the oil and oxygen are not communicated in the movable ring pipe 34, and the oil and oxygen are finally discharged outward through the oil port 35 and the air port 36, and enter the muffler pipe 11, the oil acts on the DOC module 21 to increase the catalytic temperature, and the input of oxygen can ensure sufficient combustion of particulate matter.

[0035] Referring to Figures 3-7 As shown, the muffler pipe 11 is provided with a rotating assembly 37 for controlling the sliding of the movable ring pipe 34 in the fixed ring pipe 33.

[0036] The movable ring pipe 34 is controlled to slide along the circumferential direction in the fixed ring pipe 33 by the rotating assembly 37, which can expand the rotating range of the oil port 35 and the air port 36, thereby expanding the range of oil and oxygen entering the muffler pipe 11, and ensuring that the oil and oxygen can be uniformly input into the muffler pipe 11.

[0037] Referring to Figures 3-7 As shown, the rotating assembly 37 comprises a driven rotating rod 371 fixed on the movable ring pipe 34, a rotating ring 372 rotatably installed on the intake pipe 12, a main power rotating rod 373 fixed on the rotating ring 372, a secondary power rotating rod 374 fixedly connected to the rotating ring 372, and a push rod 375 rotatably connected to the main power rotating rod 373 and the secondary power rotating rod 374.

[0038] The lifting block 382 is controlled to move up and down by the electric drive lifting rod 381, and the main power rotating rod 373 is driven to rotate under the transmission of the positioning rod 384, the rotating ring 372 and the secondary power rotating rod 374 are synchronously rotated by the main power rotating rod 373, the push rod 375 connected between the main power rotating rod 373 and the driven rotating rod 371 is rotated at both ends, the push rod 375 connected between the secondary power rotating rod 374 and the driven rotating rod 371 is rotated at both ends, and the movable ring pipe 34 is pushed to slide along the circumferential direction of the fixed ring pipe 33 through the transmission of the push rod 375, thereby achieving the purpose of driving the movable ring pipe 34.

[0039] Referring to Figures 3-7As shown, the silencer 11 is fixedly connected with a fixed ring 41, the fixed ring 41 is fixedly installed with an inner tooth ring 42, the inner tooth ring 42 is meshingly connected with an outer tooth ring 43, and the outer tooth ring 43 is fixedly installed on the oil port 35 and the gas port 36.

[0040] The electric drive lifting rod 381 is operated to control the lifting movement of the lifting block 382, the lifting block 382 is longitudinally slidably sleeved on the sliding frame 383, at this time, the positioning rod 384 connected between the lifting block 382 and the main driving rotating rod 373 rotates at both ends, and the rotating positioning rod 384 drives the main driving rotating rod 373 to rotate.

[0041] Referring to Figures 5-8 As shown, the silencer 11 is fixedly connected with a fixed ring 41, the fixed ring 41 is fixedly installed with an inner tooth ring 42, the inner tooth ring 42 is meshingly connected with an outer tooth ring 43, and the outer tooth ring 43 is fixedly installed on the oil port 35 and the gas port 36.

[0042] When the moving ring pipe 34 slides along the fixed ring pipe 33, the oil port 35 and the gas port 36 are synchronously moved, the outer tooth ring 43 fixedly installed on the oil port 35 and the gas port 36 is meshingly connected with the inner tooth ring 42, and the outer tooth ring 43 is rotated to drive the oil port 35 and the gas port 36 to synchronously rotate, so as to adjust the direction of the intake air and the intake oil, and further expand the range of the input oil and oxygen.

[0043] Referring to Figure 2 and Figure 9 As shown, the online monitoring module 23 includes a pressure difference sensor 231 fixedly installed in the silencer 11 for monitoring the gas, a temperature sensor 232 fixedly installed in the silencer 11 for monitoring the gas, a display 233 installed outside the silencer 11, a data transmission module 234 installed outside the silencer 11 for transmitting the detected values, and a GPS module 235 installed outside the silencer 11 for positioning the geographical position of the automobile.

[0044] The pressure difference sensor 231 is used to monitor the pressure difference change in the silencer 11 in real time, and the temperature sensor 232 is used to monitor the temperature change in the silencer 11 in real time, so as to timely burn and process the particulate matters filtered in the DPF module 22 through the combustion regeneration assembly 3, maintain the filtering smoothness, and install a local fault alarm in the cab, which is easy for the driver to observe, and is provided with clear indication signs, the signs have use precautions, and processing mode information of the fault alarm information.

[0045] Referring to Figure 2 and Figure 10As shown, the sound attenuation pipe 11 is externally sleeved and fixed with a heat preservation pipe 51, and a plurality of heat conduction pipes 52 are circumferentially installed in the heat preservation pipe 51 about the axis thereof, and one end of the heat conduction pipe 52 penetrates and is fixed in the sound attenuation pipe 11.

[0046] A large amount of heat is generated in the sound attenuation pipe 11 during the control combustion regeneration, and the heat is transferred to the heat conduction pipe 52 in the sound attenuation pipe 11, and the heat conduction pipe 52 is circumferentially distributed in the heat preservation pipe 51, which can uniformly transfer the heat to the heat preservation pipe 51, improve the effect of the heat preservation pipe 51 in protecting the outside of the sound attenuation pipe 11, and avoid the rapid dissipation of heat in the sound attenuation pipe 11.

[0047] Working principle: The tail gas filtering device is connected with the tail gas exhaust pipe of the diesel generator set, the exhaust gas enters the sound attenuation pipe 11 through the air inlet pipe 12, and the exhaust gas is sequentially subjected to catalytic treatment of the DOC module 21 and filtration treatment of the DPF module 22, and the treated exhaust gas is discharged outward through the air outlet pipe 13. When the particulate matter filtered by the DPF module 22 accumulates to a certain amount, it will affect the smoothness of the filtration. At this time, according to the real-time monitoring of the differential pressure and temperature change of the exhaust gas by the online monitoring module 23, the control combustion regeneration assembly 3 is operated, and the oil and oxygen are input into the fixed ring pipe 33 through the oil injection pipe 31 and the oxygen pipe 32 respectively. The oil and oxygen enter the moving ring pipe 34, and then enter the sound attenuation pipe 11 through the oil port 35 and the gas port 36. The oil acts on the DOC module 21 to quickly raise the catalytic temperature, so that the particulate matter in the DPF module 22 is subjected to combustion regeneration treatment, and the input oxygen can ensure sufficient combustion of the particulate matter. After the combustion regeneration treatment, the filtering structure in the DPF module 22 is in a smooth state.

[0048] During the input of the oil and oxygen, the electric drive lifting rod 381 is operated to control the lifting and movement of the lifting block 382, the positioning rod 384 connected between the lifting block 382 and the main power rotating rod 373 rotates correspondingly, the rotating positioning rod 384 pushes the main power rotating rod 373, the rotating ring 372 and the auxiliary power rotating rod 374 to rotate, at this time, the push rod 375 connected on both sides of the main power rotating rod 373 and the auxiliary power rotating rod 374 rotates, the rotating push rod 375 pushes the driven rotating rod 371 and the moving ring pipe 34 to rotate, so that the oil port 35 and the gas port 36 rotate circumferentially, and the distribution range of the oil and oxygen entering the sound attenuation pipe 11 is expanded.

[0049] When the oil port 35 and the gas port 36 rotate, the externally fixed external gear ring 43 meshes with the inner side of the internal gear ring 42 to rotate, and the meshing transmission of the external gear ring 43 and the internal gear ring 42 controls the rotation of the oil port 35 and the gas port 36 connected to the moving ring pipe 34, adjusts the angle of the oil and oxygen input into the sound attenuation pipe 11, and further expands the distribution range of the oil and oxygen entering the sound attenuation pipe 11, thereby improving the combustion regeneration efficiency.

[0050] The DPF module 22 generates a large amount of heat in the muffler 11 after combustion regeneration, and the heat is uniformly transmitted to the heat preservation pipe 51 through the heat conduction pipe 52, the heat preservation pipe 51 is sleeved outside the muffler 11, and the heat preservation pipe 51 has good heat preservation and protection effects and reduces heat loss in the muffler 11.

[0051] The above embodiments only express one or several embodiments of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A silencing exhaust filter device for a diesel generator set, comprising a silencing pipe (11), an inlet pipe (12) through which exhaust gas is introduced into the silencing pipe (11), and an outlet pipe (13) through which gas is discharged from the silencing pipe (11), characterized in that: The tail gas filtering device further comprises a DOC module (21) installed in the muffler (11) to catalyze the tail gas, a DPF module (22) installed in the muffler (11) to filter soot particles, and an online monitoring module (23) installed in the muffler (11) to monitor the filtered gas; The muffler (11) is provided with a combustion regeneration assembly (3) for processing the tail gas; The combustion regeneration assembly (3) comprises an oil injection pipe (31) installed on the muffler (11), and the muffler (11) is further connected with an oxygen pipe (32); the oil injection pipe (31) and the oxygen pipe (32) are connected with a fixed ring pipe (33) penetratingly; the fixed ring pipe (33) is fixedly installed in the muffler (11); and a movable ring pipe (34) is slidingly connected in the fixed ring pipe (33). The movable ring pipe (34) is rotatably installed with an oil port (35) and an air port (36). The muffler (11) is provided with a rotating assembly (37) for controlling the sliding of the movable ring pipe (34) in the fixed ring pipe (33).

2. The silencing exhaust filter for a diesel generator set according to claim 1, wherein: The rotating assembly (37) comprises a driven rotating rod (371) fixed on the movable ring pipe (34); a rotating ring (372) is rotatably installed on the intake pipe (12); the rotating ring (372) is fixed with a main power rotating rod (373) and a secondary power rotating rod (374); the main power rotating rod (373) and the secondary power rotating rod (374) are rotatably connected with a push rod (375); and the push rod (375) is rotatably connected with the driven rotating rod (371).

3. The silencing exhaust filter for a diesel generator set according to claim 2, wherein: The muffler (11) is fixedly installed with an electrically-driven lifting rod (381) having an output end fixed with a lifting block (382); the muffler (11) is fixedly installed with a sliding frame (383); and the lifting block (382) is slidingly sleeved on the sliding frame (383). The lifting block (382) is rotatably connected with a positioning rod (384) rotatably connected with the main power rotating rod (373).

4. The silencing exhaust filter of claim 1, wherein: The muffler (11) is fixedly connected with a fixed ring (41) fixedly installed with an inner gear ring (42); the inner gear ring (42) is meshingly connected with an outer gear ring (43) fixedly installed on the oil port (35) and the air port (36).

5. The silencing exhaust filter of claim 1, wherein: The online monitoring module (23) comprises a differential pressure sensor (231) fixed in the muffler (11) for monitoring the gas; the muffler (11) is fixedly installed with a temperature sensor (232) for monitoring the gas; a display (233) is installed outside the muffler (11); a data transmission module (234) for transmitting the detected values is installed outside the muffler (11); and a GPS module (235) for positioning the geographical position of the automobile is installed outside the muffler (11).

6. The silencing exhaust filter for a diesel generator set of claim 1, wherein: The muffler (11) is externally sleeved with a heat preservation pipe (51) circumferentially installed with a plurality of heat conduction pipes (52) about the axis of the heat preservation pipe (51); one end of each heat conduction pipe (52) penetrates through the muffler (11).

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