Diesel engine waste gas comprehensive treatment device

Abstract

The invention belongs to the field of diesel engine waste gas treatment equipment, and particularly relates to a diesel engine waste gas comprehensive treatment device which comprises a box body, a first partition plate and a second partition plate are fixed in the box body and divide the box body into a dust removal box, a treatment box and a liquid storage box, and the treatment box is located between the dust removal box and the liquid storage box; a U-shaped pipe is arranged between the dust removal box and the treatment box in a communicating mode, an air inlet pipe is fixedly communicated with the side wall of the dust removal box, an air outlet pipe is fixed to the second partition plate, one end of the air outlet pipe is communicated with the treatment box, the other end of the air outlet pipe extends out of the box body, and a collecting groove is fixedly communicated with the bottom of the box body. A rotating shaft is rotationally connected into the dust removal box and penetrates through the first partition plate and the second partition plate. After fine particles are adsorbed by the electrostatic plate, the particles can be cleaned in time, so that the electrostatic plate always keeps the optimal adsorption effect, and the fine particles in waste gas can be cleaned more thoroughly.

Description

Technical Field

[0001] The invention belongs to the field of diesel engine exhaust gas treatment equipment, and in particular relates to a diesel engine exhaust gas comprehensive treatment device. Background Art

[0002] A diesel engine is an internal combustion engine that uses diesel as fuel. It uses compressed air to generate high heat, and then injects atomized diesel to make it burn and expand rapidly under high temperature and pressure, thereby generating power. This pressure acts directly on the piston, pushing the piston to make non-uniform linear reciprocating motion along the cylinder. The piston's linear motion is converted into the rotational motion of the crank through the crank-connecting rod mechanism composed of the piston pin, connecting rod and crankshaft, thereby outputting mechanical work. When the diesel engine is working, a large amount of exhaust gas is generated. These exhaust gases include nitrogen oxides, sulfur oxides and particulate matter. In order not to affect the environment, the diesel engine exhaust gas needs to be treated before being discharged.

[0003] The purification of diesel engine exhaust includes the following processes: using an oxygen catalyst to oxidize carbon monoxide and hydrocarbons in the exhaust into carbon dioxide and water vapor, using a particulate filter to capture particulate matter in the exhaust, and allowing the exhaust gas to react with urea solution to desulfurize and denitrify the exhaust gas.

[0004] Existing publication number CN107754607B discloses a method and device for comprehensive treatment of ship diesel engine exhaust gas, which removes particulate matter in the exhaust gas through a high-voltage electrostatic dust removal device, and sprays oxidants and alkaline solutions through an atomization device to oxidize the exhaust gas and perform desulfurization and denitrification treatment.

[0005] The existing device has the following shortcomings:

[0006] 1. When removing particulate matter from exhaust gas by electrostatic dust removal, when more particulate matter is adsorbed on the electrostatic plate, the dust removal effect of the electrostatic plate will be greatly reduced, resulting in poor dust removal effect. Moreover, for larger particulate matter, the effect of electrostatic dust removal is also general if only electrostatic dust removal is used.

[0007] 2. In the prior art, the atomizing device remains stationary, and there is a spraying blind area when the atomizing device sprays the oxidant or the alkali solution. When the exhaust gas passes through the spraying blind area, the harmful gas in the exhaust gas cannot be fully treated, resulting in poor exhaust gas purification effect. Summary of the invention

[0008] The purpose of the present invention is to provide a comprehensive exhaust gas treatment device for a diesel engine in view of the problems raised in the above background technology.

[0009] To achieve the above object, the present invention adopts the following technical scheme: a comprehensive treatment device for diesel engine exhaust gas, comprising:

[0010] A box body, wherein a first partition and a second partition are fixed in the box body, the first partition and the second partition divide the box body into a dust removal box, a processing box and a liquid storage tank, the processing box is located between the dust removal box and the liquid storage tank, a U-shaped pipe is arranged between the dust removal box and the processing box, an air inlet pipe is fixedly connected to the side wall of the dust removal box, an air outlet pipe is fixed on the second partition, one end of the air outlet pipe is connected to the processing box, and the other end of the air outlet pipe extends outside the box body, and a collection tank is fixedly connected to the bottom of the box body.

[0011] Furthermore, a rotating shaft is rotatably connected in the dust removal box, the rotating shaft passes through the first partition and the second partition, the rotating shaft is sealed and rotatably connected to the first partition and the second partition, and a dust removal assembly is also provided in the dust removal box.

[0012] Furthermore, the dust removal component includes a plurality of slide grooves opened on the rotating shaft, an electrostatic plate is slidably connected to the slide groove, an annular plate is slidably connected to the lower surface of the first partition plate, a slide rod is fixed to the annular plate, the slide rod passes through the electrostatic plate and is slidably connected to the electrostatic plate, a mounting plate is fixed on the slide rod, a first electrode column is fixed on the mounting plate, and a second electrode column is provided on the electrostatic plate at a position opposite to the first electrode column.

[0013] Furthermore, an arc-shaped plate is fixed on one side of the bottom of the dust removal box close to the air inlet pipe, and one end of the arc-shaped plate is set to a curved surface. When the electrostatic plate is located above the arc-shaped plate, the first electrode column and the second electrode column contact to energize the electrostatic plate. A first spring is sleeved on the sliding rod between the electrostatic plate and the mounting plate, and both ends of the first spring are respectively fixed on the electrostatic plate and the mounting plate.

[0014] Furthermore, the dust removal assembly also includes a filter plate fixed on the U-shaped tube, and a cleaning assembly for cleaning the filter plate is provided in the dust removal box.

[0015] Furthermore, the cleaning assembly includes two ear seats fixed on the first partition, a movable rod is slidably connected to the ear seat, a scraper is fixed to one end of the movable rod close to the annular plate, a second spring is sleeved on the movable rod, a first arc-shaped protrusion is fixed on the scraper, and a second arc-shaped protrusion is fixed on the annular plate.

[0016] Furthermore, a plurality of atomizing nozzles are rotatably connected to the second partition, a plurality of pump bodies are provided in the liquid storage tank, the water outlets of the pump bodies are fixedly connected to the liquid inlets of the atomizing nozzles, and the liquid outlets of the atomizing nozzles penetrate the second partition and extend into the processing tank.

[0017] Furthermore, a shell is fixed to the lower surface of the second partition, a first column gear is fixed to the rotating shaft in the shell, and a second column gear meshing with the first column gear is fixed to the atomizing nozzle.

[0018] Compared with the prior art, the advantages of the present invention are:

[0019] 1. The present invention utilizes the performance of the electrostatic plate that can absorb fine particles after being energized. The exhaust gas of the diesel engine enters the dust removal box from the intake pipe and is blown toward the electrostatic plate. The electrostatic plate above the arc plate is in an energized state and the first spring thereon is in a compressed state. The electrostatic plate in the energized state absorbs the fine particles in the exhaust gas. When the exhaust gas blows toward the electrostatic plate, the electrostatic plate and the rotating shaft are driven to rotate around the axis of the rotating shaft. When the electrostatic plate on the arc plate is separated from the arc plate, the electrostatic plate is in a power-off state, and the electrostatic plate moves downward under the elastic force of the first spring and then vibrates up and down under the action of the spring until the spring returns to a natural state. The fine particles adsorbed on the electrostatic plate are separated from the electrostatic plate as the electrostatic plate vibrates and fall into the collecting tank. After the electrostatic plate adsorbs the fine particles, the particles can be cleaned up in time, so that the electrostatic plate always maintains the best adsorption effect, and the fine particles in the exhaust gas are cleaned more thoroughly.

[0020] 2. The present invention sets a filter plate. When the fine particles after cleaning fly into the treatment box from the U-shaped tube, the larger particles in the exhaust gas are blocked by the filter plate in the dust removal box. The particles in the exhaust gas are completely removed through the double cleaning of the electrostatic plate and the filter plate, and the dust removal effect is good. In addition, the present invention sets a cleaning component. When the rotating shaft rotates, it can drive the scraper to move to scrape off the larger particles on the filter plate to avoid clogging of the filter plate.

[0021] 3. The rotating shaft and the atomizing nozzle of the present invention are respectively provided with a first column gear and a second column gear. When the rotating shaft rotates, the atomizing nozzle is driven to rotate under the action of the first column gear and the second column gear. By arranging a plurality of rotating atomizing nozzles, there is no blind spot in the spraying of the atomizing nozzle, so that the harmful gas in the exhaust gas can be fully processed and the purification effect is improved.

[0022] 4. The present invention utilizes the kinetic energy of the exhaust gas entering the dust removal box to drive the rotating shaft to rotate, thereby realizing automatic cleaning of the electrostatic plate and the filter plate and rotation of the atomizing nozzle, without the need for additional driving devices, thereby reducing the manufacturing cost of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of a comprehensive diesel engine exhaust gas treatment device provided by the present invention;

[0024] Figure 2 This is a schematic diagram of the structure inside a box of a comprehensive diesel engine exhaust gas treatment device provided by the present invention;

[0025] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0026] Figure 4It is a schematic diagram of the internal structure of a shell of a diesel engine exhaust comprehensive treatment device provided by the present invention;

[0027] Figure 5 It is a partial structural schematic diagram of a dust removal component of a diesel engine exhaust comprehensive treatment device provided by the present invention;

[0028] Figure 6 yes Figure 5 Enlarged view of point B in the middle.

[0029] In the figure, 1 box body, 11 first partition plate, 12 second partition plate, 121 shell, 13 dust removal box, 14 processing box, 15 liquid storage box, 16 U-shaped pipe, 17 air inlet pipe, 18 air outlet pipe, 19 collection tank;

[0030] 21 rotating shaft, 211 sliding groove, 212 electrostatic plate, 22 annular plate, 23 sliding rod, 231 mounting plate, 232 first electrode column, 2121 second electrode column, 24 arc plate, 25 first spring, 26 filter plate, 260 ear seat, 261 movable rod, 262 scraper, 263 second spring, 264 first arc protrusion, 265 second arc protrusion;

[0031] 31 atomizing nozzle, 32 pump body, 33 first column gear, 34 second column gear. DETAILED DESCRIPTION

[0032] The following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0033] like Figure 1-Figure 6 As shown, a comprehensive treatment device for diesel engine exhaust gas includes a box body 1, in which a first partition plate 11 and a second partition plate 12 are fixed, the first partition plate 11 and the second partition plate 12 divide the box body 1 into a dust removal box 13, a treatment box 14 and a liquid storage tank 15, the liquid storage tank 15 is filled with urea solution, the treatment box 14 is located between the dust removal box 13 and the liquid storage tank 15, a U-shaped pipe 16 is arranged between the dust removal box 13 and the treatment box 14, an air intake pipe 17 is fixedly connected to the side wall of the dust removal box 13, an oxidation reactor is arranged on the air intake pipe 17, an air outlet pipe 18 is fixed to the second partition plate 12, one end of the air outlet pipe 18 is connected to the treatment box 14, and the other end of the air outlet pipe 18 extends to the outside of the box body 1, and a collecting tank 19 is fixedly connected to the bottom of the box body 1, and a cleaning port is opened on the collecting tank 19.

[0034] During operation, the exhaust gas of the diesel engine enters the dust removal box 13 from the intake pipe 17 after being oxidized by the oxidation reactor. After the particulate matter is removed in the dust removal box 13, the exhaust gas enters the treatment box 14 from the U-shaped pipe 16. After the exhaust gas is desulfurized and denitrified in the treatment box 14, the exhaust gas is discharged from the outlet pipe 18.

[0035] A rotating shaft 21 is rotatably connected in the dust removal box 13, and the rotating shaft 21 passes through the first partition 11 and the second partition 12. The rotating shaft 21 is sealed and rotatably connected with the first partition 11 and the second partition 12. A dust removal component is also provided in the dust removal box 13, and the dust removal component includes a plurality of slide grooves 211 opened on the rotating shaft 21, and an electrostatic plate 212 is slidably connected to the slide groove 211. An annular plate 22 is slidably connected to the lower surface of the first partition 11, and a sliding rod 23 is fixed on the annular plate 22. The sliding rod 23 passes through the electrostatic plate 212 and is slidably connected to the electrostatic plate 212. A mounting plate 231 is fixed on the sliding rod 23, and the mounting plate 2 A first electrode column 232 is fixed on 31, and a second electrode column 2121 is provided on the electrostatic plate 212 at a position opposite to the first electrode column 232. An arc plate 24 is fixed on the bottom of the dust removal box 13 on one side close to the air inlet pipe 17, and one end of the arc plate 24 is set as an arc surface. When the electrostatic plate 212 is located above the arc plate 24, the first electrode column 232 and the second electrode column 2121 contact to energize the electrostatic plate 212. A first spring 25 is sleeved on the sliding rod 23 between the electrostatic plate 212 and the mounting plate 231, and both ends of the first spring 25 are respectively fixed on the electrostatic plate 212 and the mounting plate 231.

[0036] When working, the first electrode column 232 and the second electrode column 2121 are connected to an external power supply. After the power is turned on, the electrostatic plate 212 located above the arc plate 24 is in a powered state and the first spring 25 thereon is in a compressed state. The exhaust gas enters the dust removal box 13 from the air intake pipe 17 and blows toward the electrostatic plate 212 in the powered state. The fine particles in the exhaust gas are adsorbed by the electrostatic plate 212. When the exhaust gas blows toward the electrostatic plate 212, the electrostatic plate 212 and the rotating shaft 21 are driven to rotate around the axis of the rotating shaft 21, so that the electrostatic plates above the arc plate 24 are aligned with the arc plate 24 one by one. 4, and the electrostatic plates 212 in the power-off state move one by one to the top of the arc plate 24 to be energized. When the electrostatic plates 212 in the power-on state are detached from the arc plate 24, the electrostatic plates 212 move downward under the action of the first spring 25, and the first electrode column 232 and the second electrode column 2121 thereon are separated, so that the electrostatic plates 212 are powered off, and the electrostatic plates 212 vibrate up and down with the first spring 25 until the first spring 25 returns to a natural state. When the electrostatic plates 212 vibrate up and down, the fine particles adsorbed thereon fall off into the collecting tank 19.

[0037] The dust removal assembly also includes a filter plate 26 fixed on the U-shaped tube 16. A cleaning assembly for cleaning the filter plate 26 is provided in the dust removal box 13. The cleaning assembly includes two ear seats 260 fixed on the first partition plate 11. A movable rod 261 is slidably connected to the ear seat 260. A scraper 262 is fixed to one end of the movable rod 261 close to the annular plate 22. A second spring 263 is sleeved on the movable rod 261. A first arc-shaped protrusion 264 is fixed on the scraper 262. A second arc-shaped protrusion 265 is fixed on the annular plate 22.

[0038] When the exhaust gas after cleaning the fine particles enters the treatment box 14 through the U-shaped pipe 16, the larger particles in the exhaust gas are blocked in the dust removal box 13 by the filter plate 26. When the rotating shaft 21 rotates, it drives the second arc-shaped protrusion 265 to rotate. When the second arc-shaped protrusion 265 contacts the first arc-shaped protrusion 264, it drives the scraper 262 to move toward the direction close to the ear seat 260 and compresses the second spring 263. When the second arc-shaped protrusion 265 separates from the first arc-shaped protrusion 264, the scraper 262 is reset under the action of the second spring 263, so that the scraper 262 moves back and forth to clean the filter plate 26.

[0039] A plurality of atomizing nozzles 31 are rotatably connected to the second partition 12, a plurality of pump bodies 32 are provided in the liquid storage tank 15, the water outlet of the pump body 32 is fixedly connected to the liquid inlet of the atomizing nozzle 31, the liquid outlet of the atomizing nozzle 31 passes through the second partition 12 and extends into the processing box 14, a shell 121 is fixed to the lower surface of the second partition 12, a first column gear 33 is fixed to the rotating shaft 21 in the shell 121, and a second column gear 34 meshing with the first column gear 33 is fixed to the atomizing nozzle 31.

[0040] When working, the pump body 32 is started, and the pump body 32 draws the urea solution in the liquid storage tank 15 into the atomizing nozzle 31 for atomization and then sprays it into the treatment box 14. When the rotating shaft 21 rotates, it drives the first column gear 33 to rotate. Under the action of gear meshing, the second column gear 34 drives the atomizing nozzle 31 to rotate, and the exhaust gas entering the treatment box 14 reacts with the urea solution sprayed from the atomizing nozzle 31 to perform denitrification and desulfurization.

[0041] The working principle of the present invention is as follows:

[0042] During operation, the first electrode column 232 and the second electrode column 2121 are connected to an external power source, and the pump body 32 is turned on. The exhaust gas of the diesel engine enters the dust removal box 13 after being oxidized by the oxidation reactor from the intake pipe 17. After the power is turned on, the electrostatic plate 212 located above the arc plate 24 is in a powered state and the first spring 25 thereon is in a compressed state. The exhaust gas enters the dust removal box 13 from the intake pipe 17 and blows toward the electrostatic plate 212 in the powered state. The fine particles in the exhaust gas are adsorbed by the electrostatic plate 212. When the exhaust gas blows toward the electrostatic plate 212, the electrostatic plate 212 and the rotating shaft 21 are driven to rotate around the axis of the rotating shaft 21, so that the electrostatic plates above the arc plate 24 are separated from the arc plate 24 one by one, and at the same time, the electrostatic plates in the powered-off state are The plates 212 move one by one to the top of the arc plate 24 and are energized. When the energized electrostatic plate 212 is separated from the arc plate 24, the electrostatic plate 212 moves downward under the action of the first spring 25, and the first electrode column 232 and the second electrode column 2121 thereon are separated, thereby cutting off the power to the electrostatic plate 212, and the electrostatic plate 212 will vibrate back and forth up and down with the first spring 25 until the first spring 25 returns to a natural state. When the electrostatic plate 212 vibrates up and down, the fine particles adsorbed thereon fall off into the collecting tank 19. After the electrostatic plate 212 adsorbs the fine particles, the particles can be cleaned up in time, so that the electrostatic plate 212 always maintains the best adsorption effect, and the fine particles in the exhaust gas are cleaned more thoroughly.

[0043] When the exhaust gas after cleaning the fine particles enters the treatment box 14 through the U-shaped pipe 16, the larger particles in the exhaust gas are blocked in the dust removal box 13 by the filter plate 26, and the second arc-shaped protrusion 265 is driven to rotate when the rotating shaft 21 rotates. When the second arc-shaped protrusion 265 contacts the first arc-shaped protrusion 264, the scraper 262 is driven to move toward the direction close to the ear seat 260 and compress the second spring 263. When the second arc-shaped protrusion 265 separates from the first arc-shaped protrusion 264, the scraper 262 is reset under the action of the second spring 263, so that the scraper 262 moves back and forth to clean the filter plate 26, so that the larger particles fall from the filter plate 26 into the collection tank 19, thereby avoiding clogging of the filter plate 26.

[0044] The pump body 32 draws the urea solution in the storage tank 15 into the atomizing nozzle 31 for atomization and then sprays it into the treatment box 14. When the rotating shaft 21 rotates, it drives the first column gear 33 to rotate. Under the action of gear meshing, the second column gear 34 drives the atomizing nozzle 31 to rotate. After the exhaust gas enters the treatment box 14 from the U-shaped tube 16, it reacts with the urea solution sprayed from the atomizing nozzle 31 to perform denitrification and desulfurization. By arranging a plurality of rotating atomizing nozzles 31, there is no blind spot in the spraying of the atomizing nozzle 31, so that the harmful gas in the exhaust gas is fully treated and the purification effect is improved. The present invention utilizes the kinetic energy of the exhaust gas when entering the dust removal box 13 to drive the rotating shaft 21 to rotate, so as to realize the automatic cleaning of the electrostatic plate 212 and the filter plate 26 and the rotation of the atomizing nozzle 31, and no additional driving device is required, thereby reducing the manufacturing cost of the equipment.

[0045] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A comprehensive diesel engine exhaust treatment device, characterized in that: include: A box body (1), wherein a first partition (11) and a second partition (12) are fixed inside the box body (1), wherein the first partition (11) and the second partition (12) divide the box body (1) into a dust removal box (13), a treatment box (14) and a liquid storage box (15), wherein the treatment box (14) is located between the dust removal box (13) and the liquid storage box (15), wherein a U-shaped pipe (16) is arranged in communication between the dust removal box (13) and the treatment box (14), wherein an air inlet pipe (17) is fixedly connected to a side wall of the dust removal box (13), wherein an air outlet pipe (18) is fixedly connected to the second partition (12), wherein one end of the air outlet pipe (18) is connected to the treatment box (14), and the other end of the air outlet pipe (18) extends to the outside of the box body (1), and wherein a collecting tank (19) is fixedly connected to the bottom of the box body (1).

2. A diesel engine exhaust comprehensive treatment device according to claim 1, characterized in that A rotating shaft (21) is rotatably connected in the dust removal box (13), and the rotating shaft (21) passes through the first partition plate (11) and the second partition plate (12). The rotating shaft (21) is sealed and rotatably connected to the first partition plate (11) and the second partition plate (12). A dust removal component is also provided in the dust removal box (13).

3. A diesel engine exhaust comprehensive treatment device according to claim 2, characterized in that: The dust removal component comprises a plurality of slide grooves (211) opened on the rotating shaft (21), the slide grooves (211) are slidably connected to an electrostatic plate (212), the lower surface of the first partition plate (11) is slidably connected to an annular plate (22), a slide rod (23) is fixed to the annular plate (22), the slide rod (23) passes through the electrostatic plate (212) and is slidably connected to the electrostatic plate (212), a mounting plate (231) is fixed to the slide rod (23), a first electrode column (232) is fixed to the mounting plate (231), and a second electrode column (2121) is provided at a position on the electrostatic plate (212) opposite to the first electrode column (232).

4. A diesel engine exhaust comprehensive treatment device according to claim 3, characterized in that: An arc-shaped plate (24) is fixed on one side of the bottom of the dust removal box (13) close to the air inlet pipe (17), one end of the arc-shaped plate (24) is set as an arc-shaped surface, when the electrostatic plate (212) is located above the arc-shaped plate (24), the first electrode column (232) and the second electrode column (2121) are in contact so that the electrostatic plate (212) is energized, and a first spring (25) is sleeved on the sliding rod (23) between the electrostatic plate (212) and the mounting plate (231), and the two ends of the first spring (25) are respectively fixed on the electrostatic plate (212) and the mounting plate (231).

5. A diesel engine exhaust comprehensive treatment device according to claim 2, characterized in that: The dust removal component also includes a filter plate (26) fixed on the U-shaped tube (16), and a cleaning component for cleaning the filter plate (26) is provided in the dust removal box (13).

6. A diesel engine exhaust comprehensive treatment device according to claim 5, characterized in that: The cleaning assembly comprises two ear seats (260) fixed on the first partition plate (11), a movable rod (261) is slidably connected to the ear seat (260), a scraper (262) is fixed to one end of the movable rod (261) close to the annular plate (22), a second spring (263) is sleeved on the movable rod (261), a first arc-shaped protrusion (264) is fixed on the scraper (262), and a second arc-shaped protrusion (265) is fixed on the annular plate (22).

7. A diesel engine exhaust comprehensive treatment device according to claim 1, characterized in that: A plurality of atomizing nozzles (31) are rotatably connected to the second partition plate (12), a plurality of pump bodies (32) are arranged in the liquid storage tank (15), the water outlets of the pump bodies (32) are fixedly connected to the liquid inlets of the atomizing nozzles (31), and the liquid outlets of the atomizing nozzles (31) penetrate the second partition plate (12) and extend into the processing tank (14).

8. A diesel engine exhaust comprehensive treatment device according to claim 7, characterized in that: A housing (121) is fixed on the lower surface of the second partition plate (12), a first column gear (33) is fixed on the rotating shaft (21) in the housing (121), and a second column gear (34) meshing with the first column gear (33) is fixed on the atomizing nozzle (31).

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