Diesel engine tail gas aftertreatment method and device suitable for complex working conditions

Abstract

The invention discloses a diesel engine tail gas after-treatment device suitable for complex working conditions, and belongs to the technical field of tail gas treatment, a primary filtering mechanism used for primarily filtering diesel engine tail gas is arranged on a connecting mechanism, and a treatment mechanism used for conducting multi-layer treatment on the diesel engine tail gas and then discharging the diesel engine tail gas is arranged on the primary filtering mechanism. The connecting mechanism is connected with an exhaust pipe of external diesel engine equipment through a plurality of rotating pipes capable of rotating mutually, and is connected with the external diesel engine equipment through two rotating connecting arms capable of rotating, so that the device can be suitable for the installation environment of complex working conditions, and the adaptability is good; the primary filtering mechanism and the treatment mechanism can perform multi-layer filtering and treatment on the tail gas of the oil extraction machine, different components in the tail gas are treated respectively, and the tail gas treatment effect is good; harmful substances such as nitric oxide in the tail gas are treated in a manner of combustion and catalytic combination of the tail gas, harmless nitrogen, carbon dioxide and water are generated, and the treatment process is environment-friendly and harmless.

Description

Technical Field

[0001] The invention relates to the technical field of exhaust gas treatment, and in particular to a diesel engine exhaust gas post-treatment method and device suitable for complex working conditions. Background Art

[0002] Diesel exhaust refers to the exhaust gas emitted by a diesel engine during operation. Since diesel engines generate higher temperatures and pressures during combustion, their exhaust components are different from those of gasoline engines. Diesel exhaust usually contains some harmful substances, such as nitrogen oxides, particulate matter, carbon monoxide and hydrocarbons, which pose a threat to the environment and human health. In order to reduce the pollution of diesel exhaust to the environment, many emission control technologies are widely used. Diesel exhaust treatment devices refer to equipment used to treat and purify exhaust gas emitted by diesel engines. The purpose of these devices is to reduce harmful substances in diesel exhaust, reduce environmental pollution, and meet the requirements of emission regulations. The exhaust gas emitted by diesel engines usually contains harmful substances such as nitrogen oxides, hydrocarbons, particulate matter and carbon monoxide. The exhaust treatment device is to solve the problem of these pollutants; the diesel exhaust treatment device in the prior art usually cannot adapt to the installation environment of complex working conditions and cannot cope with complex working conditions. Summary of the invention

[0003] In response to the above technical problems, the technical solution adopted by the present invention is: a diesel engine exhaust after-treatment device suitable for complex working conditions, including a connecting mechanism for fixing to the outside, the connecting mechanism including an air intake shell, the connecting mechanism is provided with a primary filtering mechanism for preliminary filtering of the diesel engine exhaust, the primary filtering mechanism includes a purification treatment cylinder, the purification treatment cylinder is fixedly installed on the air intake shell, the primary filtering mechanism is provided with a treatment mechanism for discharging the diesel engine exhaust after multi-layer treatment, the treatment mechanism includes a top fan, and the top fan is fixedly installed on the purification treatment cylinder.

[0004] Furthermore, the connecting mechanism includes two rotating connecting arms rotatably installed on both sides of the air intake shell, a rotating connecting frame is rotatably installed on the rotating connecting arms, an inner telescopic leg is slidably installed in the rotating connecting frame, a fixed connecting plate is fixedly installed on the inner telescopic leg, a plurality of bolt holes are arranged on the fixed connecting plate, a plurality of connecting holes are arranged on the inner telescopic leg, and the inner telescopic leg is fixed to the rotating connecting frame by adjusting bolts passing through the connecting holes.

[0005] Furthermore, a fixed air intake pipe is fixedly installed at the bottom of the air intake shell, an intermediate rotating pipe is rotatably installed on the fixed air intake pipe, a terminal rotating pipe is rotatably installed on the intermediate rotating pipe, an external connecting plate is fixedly installed on the terminal rotating pipe, and a plurality of bolt holes are arranged on the external connecting plate.

[0006] When in use, loosen the adjusting bolt to adjust the relative position of the inner telescopic leg and the rotating connecting frame, and the inner telescopic leg and the rotating connecting frame slide relative to each other. After the adjustment is completed, the rotating connecting frame and the inner telescopic leg are connected by adjusting the bolt, and the rotating connecting arm and the rotating connecting frame can rotate relative to each other. The rotating connecting arm can rotate relative to the air intake shell, and the two rotating connecting arms and the air intake shell rotate independently. The fixed connecting plate can be installed on equipment under different working conditions through the rotating connecting arm, the rotating connecting frame and the inner telescopic leg. At the same time, the middle rotating pipe can rotate relative to the fixed air intake pipe, and the terminal rotating pipe can rotate relative to the middle rotating pipe, so as to adjust the direction of the terminal rotating pipe, and connect it to the external equipment that discharges diesel engine exhaust through the external connecting plate, so as to realize the installation connection between the device and equipment under different working conditions.

[0007] Furthermore, the primary filtering mechanism includes an inner entrance cylinder fixedly installed in the air intake shell, a smoke filter inner cylinder is fixedly installed on the inner entrance cylinder, a plurality of equidistant air holes are arranged on the side wall of the smoke filter inner cylinder, a water pool is fixedly installed under the air intake shell, the water pool is filled with clean water, an inner isolation cylinder is fixedly installed on the water pool, the inner isolation cylinder covers the outer side of the smoke filter inner cylinder, a fixed track is arranged on the air intake shell, the fixed track is made of transparent material, scale lines are arranged next to the fixed track, a water supply hole is arranged on the side of the air intake shell, and a plug is arranged on the water supply hole.

[0008] Furthermore, a plurality of water traps are arranged on the air intake shell, the part of the water traps located inside the air intake shell is opened upward, and a circular arc section is arranged on the water traps. When the liquid level in the air intake shell and the sump tray exceeds the water traps, the liquid is discharged from the water traps.

[0009] Furthermore, a fixed track is fixedly installed on the pool tray, and an open outer tray is slidably installed on the fixed track. The open outer tray rotates along the outer wall of the pool tray. A plurality of external docking holes are arranged on the open outer tray, and a plurality of internal docking holes are arranged on the side wall of the pool tray. When in use, the internal docking holes are staggered with the external docking holes.

[0010] The external exhaust gas enters the inner cylinder and the smoke filter inner cylinder through the terminal transfer pipe, the middle transfer pipe and the fixed intake pipe. The exhaust gas enters between the smoke filter inner cylinder and the inner isolation cylinder through the air holes on the side wall of the smoke filter inner cylinder. Then the exhaust gas enters the clean water in the sump. The clean water in the sump filters some particulate matter and oil film in the exhaust gas. After passing through the clean water, the exhaust gas enters between the intake shell and the inner isolation cylinder, and then continues to move upward.

[0011] When the liquid level in the air intake shell is flush with the opening of the water trap, the liquid will enter the water trap and then be discharged from the water trap to prevent excessive liquid in the air intake shell. The oil film filtered by clean water will float on the water surface, and the oil film will be discharged from the co-existing water trap together with the excess water.

[0012] After the clean water in the air intake shell has been used for a period of time, some of the filtered particles will sink to the bottom of the sump tray. At this time, turn and open the outer disk so that the internal docking holes are all aligned with the external docking holes. The water and particles in the sump tray flow out from the internal docking holes and the external docking holes. Then remove the plug on the water supply hole on the side of the air intake shell and replenish water into the sump tray from the water supply hole.

[0013] Furthermore, the processing mechanism includes a drainage shell fixedly installed in the air intake shell, two inner plates are fixedly installed in the drainage shell, combustion tubes are arranged on the inner plates, and upper plates and middle plates are arranged in the purification treatment cylinder.

[0014] Furthermore, an annular filter element is arranged on the middle plate, an isolation plate is fixedly installed on the upper plate, a honeycomb catalyst is arranged on the upper plate, and the honeycomb catalyst is honeycomb-shaped. The exhaust gas enters the inner side of the annular filter element through the drainage shell, and then passes through the outer side of the annular filter element into the honeycomb catalyst, and is finally discharged by the top fan.

[0015] The exhaust gas rises to the combustion tube, where it is burned to remove most of the carbon monoxide, nitrogen oxides, and hydrocarbons in the exhaust gas, generating nitrogen, carbon dioxide and water. Part of the water vapor will adhere to the inner wall of the drainage shell and eventually fall into the intake shell. The burned exhaust gas enters the annular filter element, where the dust and fine particles in the exhaust gas are adsorbed, and then the exhaust gas enters the holes of the honeycomb catalyst, where the remaining carbon monoxide, nitrogen oxides, and hydrocarbons in the exhaust gas are removed to generate nitrogen, carbon dioxide and water, which are then drawn out by the top fan for discharge.

[0016] A diesel engine exhaust aftertreatment method suitable for complex working conditions is characterized by the following steps: 1. Connecting with the exhaust emission equipment of the oil production machine; 2. The exhaust gas enters the clean water, and the oil film and some particulate matter are filtered through the clean water; 3. The exhaust gas is ignited, and carbon monoxide, nitrogen oxides, and hydrocarbons are removed by combustion; 4. The residual dust and fine particulate matter in the exhaust gas are adsorbed by the filter element; 5. The remaining carbon monoxide, nitrogen oxides, and hydrocarbons are removed by a three-way catalyst; 6. The purified exhaust gas is discharged by an exhaust fan.

[0017] Compared with the prior art, the present invention has the following advantages: (1) The connection mechanism provided in the present invention is connected to the exhaust pipe of an external diesel engine device through a plurality of mutually rotatable rotating tubes, and is connected to the external diesel engine device through two rotatable rotating connecting arms, so that the device can be applied to installation environments with complex working conditions and has good adaptability; (2) The primary filtering mechanism and the treatment mechanism provided in the present invention can perform multi-layer filtration and treatment on the exhaust gas of the oil production machine, and treat different components in the exhaust gas separately, so that the exhaust gas treatment effect is good; (3) The treatment mechanism provided in the present invention treats harmful substances such as nitrogen oxides in the exhaust gas by burning and catalytically combining some components in the exhaust gas, and generates harmless nitrogen, carbon dioxide and water, and the treatment process is environmentally friendly and harmless. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the overall structure of the present invention (interior).

[0020] Figure 3 It is a schematic diagram of the processing flow of the present invention.

[0021] Figure 4 Schematic diagram of the connecting mechanism structure of the present invention Figure 1 .

[0022] Figure 5 Schematic diagram of the connecting mechanism structure of the present invention Figure 2 .

[0023] Figure 6 The schematic diagram of the primary filtering mechanism of the present invention is shown in FIG. Figure 1 .

[0024] Figure 7 The schematic diagram of the primary filtering mechanism of the present invention is shown in FIG. Figure 2 .

[0025] Figure 8 The schematic diagram of the primary filtering mechanism of the present invention is shown in FIG. Figure 3 .

[0026] Fig. 9 It is a schematic diagram of the processing mechanism structure of the present invention.

[0027] Figure numbers: 101-intake shell; 102-rotating connecting arm; 103-rotating connecting frame; 104-inner telescopic leg; 105-fixed connecting plate; 106-fixed intake pipe; 107-middle rotating pipe; 108-end rotating pipe; 109-adjusting bolt; 110-external connecting plate; 201-purification treatment cylinder; 202-inner isolation cylinder; 203-smoke filter inner cylinder; 204-water trap; 205-sink plate; 206-open outer plate; 207-enter inner cylinder; 208-external docking hole; 209-internal docking hole; 210-fixed track; 301-top fan; 302-honeycomb catalyst; 303-annular filter element; 304-drainage shell; 305-combustion tube; 306-inner plate; 307-middle plate; 308-upper plate; 309-isolation plate. DETAILED DESCRIPTION

[0028] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0029] Example: Reference Figure 1-Figure 9 , a diesel engine exhaust after-treatment device suitable for complex working conditions, including a connecting mechanism for fixing with the outside, the connecting mechanism including an air intake shell 101, a primary filtering mechanism for preliminary filtering of the diesel engine exhaust is arranged on the connecting mechanism, the primary filtering mechanism includes a purification treatment cylinder 201, the purification treatment cylinder 201 is fixedly installed on the air intake shell 101, the primary filtering mechanism is provided with a processing mechanism for discharging the diesel engine exhaust after multi-layer processing, the processing mechanism includes a top fan 301, and the top fan 301 is fixedly installed on the purification treatment cylinder 201.

[0030] like Figure 4 , Figure 5 As shown, the connecting mechanism includes two rotating connecting arms 102 rotatably installed on both sides of the air intake shell 101, a rotating connecting frame 103 is rotatably installed on the rotating connecting arms 102, an inner telescopic leg 104 is slidably installed in the rotating connecting frame 103, a fixed connecting plate 105 is fixedly installed on the inner telescopic leg 104, a plurality of bolt holes are provided on the fixed connecting plate 105, a plurality of connecting holes are provided on the inner telescopic leg 104, and the inner telescopic leg 104 is fixed to the rotating connecting frame 103 by adjusting bolts 109 passing through the connecting holes.

[0031] like Figure 4 , Figure 5 As shown, a fixed air intake pipe 106 is fixedly installed at the bottom of the air intake shell 101, an intermediate rotating pipe 107 is rotatably installed on the fixed air intake pipe 106, a terminal rotating pipe 108 is rotatably installed on the intermediate rotating pipe 107, an external connecting plate 110 is fixedly installed on the terminal rotating pipe 108, and a plurality of bolt holes are provided on the external connecting plate 110.

[0032] When in use, loosen the adjusting bolt 109 to adjust the relative position of the inner telescopic leg 104 and the rotating connecting frame 103, and the inner telescopic leg 104 and the rotating connecting frame 103 slide relative to each other. After the adjustment is completed, the rotating connecting frame 103 and the inner telescopic leg 104 are connected by adjusting the bolt 109, and the rotating connecting arm 102 and the rotating connecting frame 103 can rotate relative to each other, and the rotating connecting arm 102 can rotate relative to the air intake shell 101, and the mutual rotation of the two rotating connecting arms 102 and the air intake shell 101 is independent. By rotating the connecting arm 102, the rotating connecting frame 103 and the inner telescopic leg 104, the fixed connecting plate 105 can be installed on equipment under different working conditions. At the same time, the intermediate rotating pipe 107 can rotate relative to the fixed air intake pipe 106, and the terminal rotating pipe 108 can rotate relative to the intermediate rotating pipe 107, so as to adjust the direction of the terminal rotating pipe 108, and connect it to the equipment that discharges diesel engine exhaust gas to the outside through the external connecting plate 110, so as to realize the installation connection between the device and equipment under different working conditions.

[0033] like Figure 6-Figure 8 As shown, the primary filtering mechanism includes an entry inner cylinder 207 fixedly installed in the air inlet shell 101, a smoke filter inner cylinder 203 is fixedly installed on the entry inner cylinder 207, a plurality of equidistant air holes are arranged on the side wall of the smoke filter inner cylinder 203, a water pool tray 205 is fixedly installed below the air inlet shell 101, the water pool tray 205 is filled with clean water, an inner isolation cylinder 202 is fixedly installed on the water pool tray 205, the inner isolation cylinder 202 covers the outer side of the smoke filter inner cylinder 203, a fixed track 210 is arranged on the air inlet shell 101, the fixed track 210 is made of transparent material, scale lines are arranged next to the fixed track 210, a water replenishing hole is arranged on the side of the air inlet shell 101, and a plug is arranged on the water replenishing hole.

[0034] like Figure 6-Figure 8 As shown, a plurality of water traps 204 are provided on the air inlet shell 101. The water traps 204 located inside the air inlet shell 101 are partially opened upwards, and arc sections are provided on the water traps 204. When the liquid level in the air inlet shell 101 and the pool tray 205 exceeds the water traps 204, the liquid is discharged from the water traps 204.

[0035] like Figure 6-Figure 8 As shown, a fixed track 210 is fixedly installed on the pool tray 205, and an open outer tray 206 is slidably installed on the fixed track 210. The open outer tray 206 rotates along the outer wall of the pool tray 205. A plurality of external docking holes 208 are arranged on the open outer tray 206, and a plurality of internal docking holes 209 are arranged on the side wall of the pool tray 205. When in use, the internal docking holes 209 are staggered with the external docking holes 208.

[0036] The external exhaust gas enters into the inner cylinder 207 and the smoke filter inner cylinder 203 through the terminal rotating pipe 108, the middle rotating pipe 107 and the fixed air inlet pipe 106, and the exhaust gas enters into between the smoke filter inner cylinder 203 and the inner insulating cylinder 202 through the air holes on the side wall of the smoke filter inner cylinder 203, and then the exhaust gas enters into the clean water in the pool 205, and some particulate matter and oil film in the exhaust gas are filtered by the clean water in the pool 205, and the exhaust gas after passing through the clean water enters into between the air inlet shell 101 and the inner insulating cylinder 202, and then continues to move upward.

[0037] When the liquid level in the air intake shell 101 is flush with the opening of the water trap 204, the liquid will enter the water trap 204 and then be discharged from the water trap 204 to prevent excessive liquid in the air intake shell 101. The oil film filtered by clean water will float on the water surface, and the oil film will be discharged from the water trap 204 together with the excess water.

[0038] After the clean water in the air intake shell 101 has been used for a period of time, some of the filtered particles will sink to the bottom of the pool plate 205. At this time, the outer plate 206 is rotated and opened to align the internal docking holes 209 and the external docking holes 208. The water and particles in the pool plate 205 flow out from the internal docking holes 209 and the external docking holes 208. Then, the plug on the water replenishing hole on the side of the air intake shell 101 is removed, and water is replenished into the pool plate 205 from the water replenishing hole.

[0039] like Fig. 9 As shown, the processing mechanism includes a drainage shell 304 fixedly installed in the air intake shell 101, two inner plates 306 are fixedly installed in the drainage shell 304, and a combustion tube 305 is arranged on the inner plate 306. An upper plate 308 and a middle plate 307 are arranged in the purification treatment cylinder 201.

[0040] like Fig. 9 As shown, an annular filter element 303 is arranged on the middle plate 307, an isolation plate 309 is fixedly installed on the upper plate 308, a honeycomb catalyst 302 is arranged on the upper plate 308, and the honeycomb catalyst 302 is honeycomb-shaped. The exhaust gas enters the inner side of the annular filter element 303 through the drainage shell 304, and then enters the honeycomb catalyst 302 through the outer side of the annular filter element 303, and is finally discharged by the top fan 301.

[0041] The exhaust gas rises to the combustion tube 305, where it is burned to remove most of the carbon monoxide, nitrogen oxides, and hydrocarbons in the exhaust gas, generating nitrogen, carbon dioxide, and water. Part of the water vapor adheres to the inner wall of the drainage shell 304 and eventually falls into the air intake shell 101. The exhaust gas after combustion enters the annular filter element 303, where the dust and fine particles in the exhaust gas are adsorbed. The exhaust gas then enters the holes of the honeycomb catalyst 302, where the remaining carbon monoxide, nitrogen oxides, and hydrocarbons in the exhaust gas are removed to generate nitrogen, carbon dioxide, and water. The gas is then drawn out by the top fan 301 for discharge.

[0042] like Figure 3 As shown, a diesel engine exhaust after-treatment method suitable for complex working conditions is characterized by the following steps: 1. Connecting with the exhaust emission equipment of the oil production machine; 2. The exhaust gas enters the clean water, and the oil film and some particulate matter are filtered through the clean water; 3. The exhaust gas is ignited, and carbon monoxide, nitrogen oxides, and hydrocarbons are removed by combustion; 4. The residual dust and fine particulate matter in the exhaust gas are adsorbed by the filter element; 5. The remaining carbon monoxide, nitrogen oxides, and hydrocarbons are removed by a three-way catalyst; 6. The purified exhaust gas is discharged through an exhaust fan.

[0043] The working principle of the diesel engine exhaust after-treatment method and device suitable for complex working conditions disclosed in the present invention is as follows: when in use, the adjusting bolt 109 is loosened to adjust the relative position of the inner telescopic leg 104 and the rotating connecting frame 103, and the inner telescopic leg 104 and the rotating connecting frame 103 slide relative to each other. After the adjustment is completed, the rotating connecting frame 103 is connected to the inner telescopic leg 104 by the adjusting bolt 109, and the rotating connecting arm 102 and the rotating connecting frame 103 can rotate relative to each other, and the rotating connecting arm 102 can rotate relative to the air intake shell 101, and The two rotating connecting arms 102 and the air intake shell 101 rotate independently of each other. The fixed connecting plate 105 can be installed on equipment under different working conditions by rotating the connecting arms 102, the rotating connecting frame 103 and the inner telescopic legs 104. At the same time, the intermediate rotating pipe 107 can rotate relative to the fixed air intake pipe 106, and the terminal rotating pipe 108 can rotate relative to the intermediate rotating pipe 107, so as to adjust the direction of the terminal rotating pipe 108, and connect it to the external equipment that discharges diesel engine exhaust through the external connecting plate 110, so as to realize the installation connection between the device and equipment under different working conditions. The external exhaust gas enters into the inner cylinder 207 and the smoke filter inner cylinder 203 through the terminal rotating pipe 108, the middle rotating pipe 107 and the fixed air inlet pipe 106, and the exhaust gas enters into between the smoke filter inner cylinder 203 and the inner insulating cylinder 202 through the air holes on the side wall of the smoke filter inner cylinder 203, and then the exhaust gas enters into the clean water in the pool 205, and some particulate matter and oil film in the exhaust gas are filtered by the clean water in the pool 205, and the exhaust gas after passing through the clean water enters into between the air inlet shell 101 and the inner insulating cylinder 202, and then continues to move upward. The exhaust gas rises to the combustion tube 305, where it is burned to remove most of the carbon monoxide, nitrogen oxides, and hydrocarbons in the exhaust gas, generating nitrogen, carbon dioxide, and water. Part of the water vapor adheres to the inner wall of the drainage shell 304 and eventually falls into the air intake shell 101. The exhaust gas after combustion enters the annular filter element 303, where the dust and fine particles in the exhaust gas are adsorbed. The exhaust gas then enters the holes of the honeycomb catalyst 302, where the remaining carbon monoxide, nitrogen oxides, and hydrocarbons in the exhaust gas are removed to generate nitrogen, carbon dioxide, and water. The gas is then drawn out by the top fan 301 for discharge.

[0044] When the liquid level in the air intake shell 101 is flush with the opening of the water trap 204, the liquid will enter the water trap 204 and then be discharged from the water trap 204 to prevent excessive liquid in the air intake shell 101. The oil film filtered by the clean water will float on the water surface, and the oil film will be discharged from the water trap 204 along with the excess water. After the clean water in the air intake shell 101 has been used for a period of time, some of the filtered particles will sink to the bottom of the pool plate 205. At this time, the outer plate 206 is turned to open so that the internal docking hole 209 and the external docking hole 208 are all aligned. The water and particles in the pool plate 205 flow out from the internal docking hole 209 and the external docking hole 208. Then, the plug on the water replenishment hole on the side of the air intake shell 101 is removed, and water is replenished into the pool plate 205 from the water replenishment hole.

[0045] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A diesel engine exhaust aftertreatment device suitable for complex working conditions, comprising a connection mechanism for fixing with an external device, characterized in that: The connecting mechanism comprises an air intake housing (101), on which a primary filtering mechanism for preliminary filtering of diesel engine exhaust gas is arranged, the primary filtering mechanism comprises a purification treatment cylinder (201), the purification treatment cylinder (201) is fixedly mounted on the air intake housing (101), the primary filtering mechanism is provided with a processing mechanism for discharging diesel engine exhaust gas after multi-layer processing, the processing mechanism comprises a top fan (301), and the top fan (301) is fixedly mounted on the purification treatment cylinder (201).

2. The diesel engine exhaust after-treatment device suitable for complex working conditions according to claim 1, characterized in that: The connection mechanism comprises two rotating connection arms (102) rotatably mounted on both sides of the air intake housing (101); a rotating connection frame (103) is rotatably mounted on the rotating connection arms (102); an inner telescopic leg (104) is slidably mounted in the rotating connection frame (103); a fixed connection plate (105) is fixedly mounted on the inner telescopic leg (104); a plurality of bolt holes are arranged on the fixed connection plate (105); a plurality of connection holes are arranged on the inner telescopic leg (104); and the inner telescopic leg (104) and the rotating connection frame (103) are fixed by adjusting bolts (109) passing through the connection holes.

3. The diesel engine exhaust after-treatment device suitable for complex working conditions according to claim 1 is characterized in that: A fixed air intake pipe (106) is fixedly mounted on the bottom of the air intake shell (101); an intermediate rotating pipe (107) is rotatably mounted on the fixed air intake pipe (106); a terminal rotating pipe (108) is rotatably mounted on the intermediate rotating pipe (107); an external connecting plate (110) is fixedly mounted on the terminal rotating pipe (108); and a plurality of bolt holes are arranged on the external connecting plate (110).

4. The diesel engine exhaust after-treatment device suitable for complex working conditions according to claim 1 is characterized in that: The primary filtering mechanism comprises an inlet inner cylinder (207) fixedly mounted in the air inlet shell (101), a smoke filter inner cylinder (203) fixedly mounted on the inlet inner cylinder (207), a plurality of equidistant air holes are arranged on the side wall of the smoke filter inner cylinder (203), a water pool (205) fixedly mounted below the air inlet shell (101), the water pool (205) is filled with clean water, an inner insulating cylinder (202) fixedly mounted on the water pool (205), the inner insulating cylinder (202) covers the outer side of the smoke filter inner cylinder (203), a fixed track (210) is arranged on the air inlet shell (101), the fixed track (210) is made of a transparent material, a scale line is arranged next to the fixed track (210), a water supply hole is arranged on the side of the air inlet shell (101), and a plug is arranged on the water supply hole.

5. The diesel engine exhaust after-treatment device suitable for complex working conditions according to claim 4 is characterized in that: The air intake shell (101) is provided with a plurality of water traps (204). The water traps (204) located inside the air intake shell (101) are partially opened upwards. The water traps (204) are provided with arc sections. When the liquid level in the air intake shell (101) and the pool tray (205) exceeds the water traps (204), the liquid is discharged from the water traps (204).

6. The diesel engine exhaust after-treatment device suitable for complex working conditions according to claim 4 is characterized in that: A fixed track (210) is fixedly mounted on the water pool tray (205), an open outer tray (206) is slidably mounted on the fixed track (210), the open outer tray (206) rotates along the outer wall of the water pool tray (205), a plurality of external docking holes (208) are arranged on the open outer tray (206), a plurality of internal docking holes (209) are arranged on the side wall of the water pool tray (205), and the internal docking holes (209) are staggered with the external docking holes (208) when in use.

7. The diesel engine exhaust after-treatment device suitable for complex working conditions according to claim 1 is characterized in that: The treatment mechanism comprises a drainage shell (304) fixedly installed in the air intake shell (101), two inner plates (306) fixedly installed in the drainage shell (304), a combustion tube (305) being arranged on the inner plates (306), and an upper plate (308) and a middle plate (307) being arranged in the purification treatment cylinder (201).

8. The diesel engine exhaust after-treatment device suitable for complex working conditions according to claim 7 is characterized in that: The middle plate (307) is provided with an annular filter element (303), an isolation plate (309) is fixedly mounted on the upper plate (308), a honeycomb catalyst (302) is provided on the upper plate (308), and the honeycomb catalyst (302) is honeycomb-shaped. The exhaust gas enters the inner side of the annular filter element (303) through the drainage shell (304), then enters the honeycomb catalyst (302) through the outer side of the annular filter element (303), and is finally discharged by the top fan (301).

9. A diesel engine exhaust post-treatment method suitable for complex working conditions, characterized in that: The steps include: S1, connected with the exhaust gas emission equipment of the oil production machine; S2, the exhaust gas enters the clean water, through which the oil film and some particles are filtered; S3, igniting the exhaust gas to remove carbon monoxide, nitrogen oxides and hydrocarbons through combustion; S4, absorbs residual dust and fine particles in the exhaust gas through the filter element; S5, removing the remaining carbon monoxide, nitrogen oxides, and hydrocarbons through a three-way catalyst; S6. Exhaust the purified exhaust gas through an exhaust fan.

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