Post-treatment device for ship tail gas

Abstract

The invention discloses a post-treatment device for ship tail gas, and belongs to the technical field of ship tail gas treatment.The post-treatment device comprises a gas inlet box, the two sides of the gas inlet box communicate with a gas inlet pipe and a gas outlet pipe correspondingly, a piston plate is installed in the gas inlet box in a sliding and sealing mode, and a controller, a driving motor and two water pumps are fixedly installed at the top of the gas inlet box; the driving motor is used for driving the water pump to operate, and the rear side of the air inlet box is fixedly connected with a rotating motor. The desulfurizing tower is used for desulfurizing the tail gas; the desulfurizing tower is used for desulfurizing tail gas, the denitration tower is used for realizing denitration of the tail gas, spraying mechanisms and stirring mechanisms are arranged in the desulfurizing tower and the denitration tower, and a communicating pipe is communicated between the desulfurizing tower and the denitration tower. The content of pollutants in treated tail gas is monitored through the arranged sensor, and the dosage of the treatment solution and the gas inlet speed of the treatment device are automatically adjusted according to the monitoring result, so that it is guaranteed that the pollutants in the tail gas are thoroughly purified, and meanwhile resource waste is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of ship exhaust gas treatment, and in particular to a post-treatment device for ship exhaust gas. Background Art

[0002] Ship exhaust is the gas emitted by ship diesel engines, which mainly contains particulate matter such as sulfur oxides and nitrogen oxides. These pollutants cause serious pollution to the atmospheric and marine environments and have attracted widespread attention from the international community.

[0003] From a global perspective, the International Maritime Organization (IMO) has adopted a series of regulations and measures to control ship exhaust emissions. For example, IMO stipulates that from 2020, a 0.5% sulfur cap on ship fuel will be implemented in global waters, and a 0.1% limit will be implemented in emission control areas. In addition, for nitrogen oxide emissions, IMO has also formulated phased limit requirements to reduce the emission of nitrogen oxides in ship exhaust.

[0004] In order to effectively deal with sulfur oxides and nitrogen oxides in ship exhaust, desulfurization and denitrification technology has become the core. At present, desulfurization technologies mainly include gypsum flue gas desulfurization, rotary spray drying desulfurization and seawater desulfurization. These technologies convert sulfur oxides in exhaust gas into stable compounds through physical or chemical methods, thereby reducing its emissions. Denitrification technology mainly uses methods such as selective catalytic reduction (SCR) and selective non-catalytic reduction (SNCR) to convert nitrogen oxides into nitrogen and water through catalysis to achieve emission reduction effects.

[0005] However, the current after-treatment devices for ship exhaust usually discharge directly after treatment, and are unable to monitor the residual amount of sulfur oxides and nitrogen oxides in the treated exhaust, and are unable to adjust the treatment process according to the pollutant content in the exhaust, making it difficult to completely purify the exhaust when the pollutant content is high, and using conventional purification methods when the pollutant content is low causes a waste of resources; therefore, we propose a ship exhaust after-treatment device to solve this problem. Summary of the invention

[0006] The purpose of the present invention is to provide a post-processing device for ship exhaust gas to solve the problems raised in the above background technology.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions: A post-processing device for ship exhaust gas, comprising: An air intake box, wherein both sides of the air intake box are respectively connected with an air intake pipe and an air outlet pipe, a piston plate is installed in a sliding seal in the air intake box, and a controller, a drive motor and two water pumps are fixedly installed on the top of the air intake box, the drive motor is used to drive the water pump to operate, a rotating motor is fixedly connected to the rear side of the air intake box, and the rotating motor is used to drive the piston plate to move up and down reciprocatingly, and a linkage mechanism is arranged in the air intake box; Desulfurization tower, used to achieve desulfurization of tail gas; A denitration tower is used to achieve denitration of exhaust gas. The desulfurization tower and the denitration tower are both provided with an injection mechanism and a stirring mechanism. A connecting pipe is connected between the desulfurization tower and the denitration tower, and the other side of the denitration tower is connected with an exhaust pipe. Sulfur dioxide sensors and nitrogen oxide sensors are fixedly installed on the inner walls of both sides of the exhaust pipe, respectively. The sulfur dioxide sensor, nitrogen oxide sensor, drive motor and rotating motor are all electrically connected to the controller. When the sulfur dioxide sensor and nitrogen oxide sensor detect that the sulfur dioxide or nitrogen oxide content exceeds the standard, the signal is transmitted to the controller. The controller controls the speed of the drive motor to increase and the speed of the rotating motor to decrease according to the exceeding condition.

[0008] Preferably, the water pump comprises a rear cover, an impeller, a pump housing, a pump shaft and a front cover, wherein the front cover and the rear cover are respectively fixedly mounted on the front and rear sides of the pump housing by bolts, and the pump shaft is rotatably connected in the pump housing, and the impeller is fixedly mounted on the outside of the pump shaft, and the top and bottom of the pump housing are respectively provided with an outlet and an inlet; Two horizontal shafts are rotatably installed on the top of the air intake box, one end of the two horizontal shafts is fixedly connected to the corresponding pump shaft, and the other end of the horizontal shaft is fixedly connected to a driven bevel gear. The output shaft of the drive motor is fixedly connected to a drive shaft, and a driving bevel gear and a rotating plate are fixedly installed on the drive shaft. The two driven bevel gears are meshed with the driving bevel gear.

[0009] Preferably, the linkage mechanism comprises a connecting shaft, a conical disk, a fixing frame and two vertical frames, the fixing frame is fixedly installed in the air intake box, and the vertical frame is slidably connected in the fixing frame, a connecting spring is fixedly connected between the two vertical frames, and a rotating seat is rotatably installed in the vertical frame; The connecting shaft is slidably connected in the two rotating seats, and both ends of the connecting shaft are fixedly connected to a rotating frame, a square rod is slidably installed in the rotating frame, and the two sides of the square rods away from each other are fixedly connected to a round rod, and the top of the piston plate is hinged with connecting plates on both sides, and the two connecting plates are respectively rotatably sleeved on the outer sides of the corresponding round rods, and the front and rear sides of the rotating seat are rotatably connected with an arc connecting rod, and the other end of the arc connecting rod is rotatably connected to the corresponding square rod; The two vertical frames are fixedly connected with a pull rope on one side away from each other, and the top ends of the two pull ropes are respectively fixedly connected to the two sides of the bottom of the conical disk, and the two sides of the conical disk are integrally formed with square protrusions, and the inner walls on both sides of the air intake box are provided with square grooves, and the two square protrusions are respectively slidably connected in the corresponding square grooves, and the tops of the square protrusions are fixedly connected with compression springs, and the top ends of the compression springs are fixedly connected to the corresponding inner walls of the tops of the square grooves, and two fixed pulleys are rotatably installed in the fixed frame, and the two pull ropes are respectively wound around the outer sides of the corresponding fixed pulleys; The outer side of the rotating plate is slidably sleeved with two sliding frames, the top of the sliding frame is fixedly connected with a counterweight plate, a tension spring is fixedly connected between the two counterweight plates, and the top of the counterweight plate is provided with a groove, and a ball is arranged in the groove, and the bottom of the conical disk is provided with a conical groove with a middle recess and surrounding protrusions, and the two balls are movably abutted in the conical groove.

[0010] Preferably, a small bevel gear is fixedly connected to the output shaft of the rotating motor, a large bevel gear is fixedly connected to the connecting shaft, and the small bevel gear is meshed with the large bevel gear.

[0011] Preferably, a rotating ring is rotatably installed on the outer side of the exhaust pipe, two vertical rods are fixedly connected to the top of the rotating ring, top ends of the two vertical rods are fixedly connected to top caps, spiral sheets are fixedly installed on the bottom of the top caps, and the bottom of the spiral sheets is fixedly connected to a pull rod, and the bottom end of the pull rod is fixedly connected to blades.

[0012] Preferably, the sulfur dioxide sensor is SGA-400B-SO2, which performs full-range three-point temperature and humidity compensation through signal amplification, data processing and intelligent calculation, and uses high-precision standard gas for data calibration. Its advantages are small size, low price and stable performance; The model of the nitrogen oxygen sensor adopts the Alphasense NOx sensor, which has high sensitivity to meet accurate monitoring and low power consumption to save energy.

[0013] Preferably, the spray mechanism includes a spray frame, a connecting head and a plurality of spray bends, the spray bends are connected to the bottom of the spray frame, and the bottom ends of the plurality of spray bends on the right are bent forward, while the bottom ends of the plurality of spray bends on the left are bent backward, so that the spray frame can rotate in the opposite direction under the reaction of the liquid sprayed from the spray bends, the connecting head is connected to the top of the spray frame, and an inlet pipe is rotatably installed in the connecting pipe, and the other end of the inlet pipe is connected to the corresponding outlet.

[0014] Preferably, the stirring mechanism includes a mounting cylinder, a vertical axis and two stirring frames, the two stirring frames are respectively fixedly connected to the two ends of the vertical axis, and the top of the stirring frame is fixedly connected to a mounting rod, the top of the mounting rod is fixedly connected to the bottom of the spray frame, the vertical axis is rotatably connected in the mounting cylinder, and two limiting rings are fixedly sleeved on the outer side of the vertical axis, the two limiting rings are movably abutted against the top and bottom of the mounting cylinder, and fixing rods are fixedly connected to the inner walls on both sides of the denitrification tower and the desulfurization tower, and the other end of the fixing rod is fixedly connected to the corresponding mounting cylinder.

[0015] Preferably, both the air inlet pipe and the air outlet pipe are provided with a one-way valve, the one-way valve comprises a rear valve body, a fastening spring, a sealing ball and a front valve body, the rear valve body and the front valve body are fixed to each other, one end of the fastening spring is fixedly connected to the inside of the rear valve body, and the other end of the fastening spring is fixedly connected to the sealing ball, and the sealing ball movably seals against the inside of the front valve body; The other end of the gas outlet pipe is communicated with the desulfurization tower.

[0016] Preferably, the two rotating frames are close to each other and are therefore fixedly connected to two guide rods, and the rotating seat is slidably sleeved on the outer sides of the corresponding guide rods.

[0017] The beneficial effects of the present invention are: In the present invention, a post-treatment device for ship exhaust gas is described, which connects the air intake pipe with the exhaust port of the propagated exhaust gas, connects the inlet of the left water pump with the supply pipe of alkaline solution (such as limestone, lime, alkali solution), and connects the inlet of the right water pump with the supply pipe of reducing solution (such as urea solution), and then starts the driving motor and the rotating motor, the rotating motor drives the small bevel gear to rotate, the small bevel gear drives the connection to rotate by meshing with the large bevel gear, the connecting shaft drives the two rotating frames and the two square rods to rotate, thereby driving the two round rods to perform circular motion, the two round rods drive the piston plate to move reciprocatingly upward by cooperating with the corresponding connecting plate, and the piston plate forms a negative pressure in the space below the piston plate in the air intake box when the piston plate moves upward, so that the propagated exhaust gas enters the air intake pipe and pushes the right sealing ball to move to the left, and then enters the air intake box through the one-way valve on the right, and the piston When the plate moves downward, the exhaust gas pushes the sealing ball on the left and enters the desulfurization tower through the one-way valve on the left, then flows into the denitration tower through the connecting pipe, and is finally discharged through the exhaust pipe. At the same time, the driving motor drives the driving shaft to rotate, and the driving shaft drives the two horizontal axes to rotate through the meshing with the active bevel gear and the two driven bevel gears. The two horizontal axes drive the corresponding pump shafts and impellers to rotate, thereby extracting the alkaline solution and the reducing solution, and introducing them into the two inlet pipes, and then introducing them into the two spray boxes through the corresponding connectors, and then spraying them out from the corresponding injection elbows, so that the alkaline solution is sprayed into the desulfurization tower and undergoes acid-base neutralization with the sulfur dioxide in the air inside it to generate sulfate, thereby realizing the desulfurization of the exhaust gas, and the reducing solution is sprayed into the denitration tower, undergoes reduction reaction with the nitrogen oxides in the air, thereby reducing them to nitrogen and water, and achieving the effect of denitration; In the present invention, the post-treatment device for ship exhaust gas drives the spray box to rotate by the reverse thrust of the liquid while the liquid is sprayed out from the spray elbow, so that the liquid is sprayed in different directions, improving the uniformity of spraying. At the same time, the spray box drives the stirring frame to rotate by the mounting rod, so that the liquid and air are stirred and fully mixed and reacted, thereby improving the efficiency of desulfurization and denitrification. In the present invention, the post-treatment device for ship exhaust gas, in the process of the treated exhaust gas being discharged from the exhaust pipe, monitors the sulfur dioxide and nitrogen oxide content in the air through the sulfur oxide sensor and the nitrogen oxide sensor. At the same time, when the exhaust gas is discharged from the top of the exhaust port, the aerodynamic force drives the spiral blade to rotate, and the pull rod drives the blade to rotate, so as to stir and disperse the flue gas, so that the exhaust gas is fully in contact with the sulfur oxide sensor and the nitrogen oxide sensor, thereby improving the monitoring accuracy. The sulfur oxide sensor and the nitrogen oxide sensor transmit the monitored sulfur dioxide and nitrogen oxide content structures to the controller, and the controller analyzes the sulfur dioxide and nitrogen oxide content structures. When the content of one of sulfur dioxide and nitrogen oxide exceeds the standard, the controller controls the speed of the driving motor to increase and the speed of the rotating motor to decrease according to the exceeding condition. The speed of the driving motor increases, thereby increasing the rotation speed of the pump shaft and the impeller, and increasing the extraction speed of the alkaline solution and the reducing solution, so that the amount of alkaline solution and the reducing solution can be increased to improve the desulfurization and denitrification effect. At the same time, the speed of the rotating motor decreases, which reduces the speed of the piston plate moving up and down and the speed of the exhaust gas introduced into the air intake box, so that less exhaust gas is poured in per unit time to facilitate thorough desulfurization and denitrification treatment and avoid residues. In the present invention, the post-treatment device for ship exhaust gas drives the rotating plate to rotate during the rotation of the driving shaft, and drives the sliding frame and the counterweight plate to perform circular motion. The counterweight plates are separated from each other under the action of centrifugal force during the circular motion, and push the tension spring to pull the rope, and push the conical disk upward through the contact between the ball and the conical groove, and compress the compression spring. The conical disk drives the two vertical frames to separate from each other through two pull ropes, and stretches the connecting spring, so that the centrifugal force of the counterweight plate is balanced through the connecting spring, the compression spring and the tension spring, and the two vertical frames separate from each other while driving the two rotating seats to separate from each other. The two rotating seats respectively drive the square rods to slide in the rotating frame through the cooperation of the corresponding arc-shaped connecting rods, so that the round rods are close to the connecting shaft. When the speed of the driving motor is increased and the centrifugal force on the counterweight increases, the round rods are further close to the connecting shaft, thereby reducing the radius of its circular motion, thereby reducing the amount of gas extracted at a single time during the up and down movement of the piston plate, thereby achieving the effect of further reducing the exhaust gas extraction amount, so as to ensure sufficient and thorough desulfurization and denitrification. In the present invention, the post-treatment device for ship exhaust gas controls the speed of the driving motor to appropriately reduce and the speed of the rotating motor to appropriately increase when the controller analyzes that the contents of sulfur dioxide and nitrogen oxide are far lower than the required values, thereby reducing the injection amount of the alkaline solution and the reducing solution while increasing the introduction speed of the exhaust gas, thereby reducing the solution effect and increasing the exhaust gas treatment speed when the exhaust gas pollution is small; In the present invention, a post-treatment device for ship exhaust gas monitors the pollutant content in the treated exhaust gas through a set sensor, and automatically adjusts the amount of treatment solution and the air intake speed of the treatment device according to the monitoring results to ensure that the pollutants in the exhaust gas are thoroughly purified while avoiding waste of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of a post-processing device for ship exhaust gas proposed by the present invention; Figure 2 This is a schematic cross-sectional view of a post-processing device for ship exhaust gas proposed by the present invention; Figure 3 for Figure 2 A partial enlarged view of the Figure 4 for Figure 3 A partial enlarged view of part A; Figure 5 for Figure 3 A partial enlarged view of part B; Figure 6 This is a schematic diagram of the exploded three-dimensional structure of the one-way valve proposed by the present invention; Figure 7 A schematic diagram of a partial three-dimensional structure of a post-processing device for ship exhaust gas proposed by the present invention; Figure 8 It is a three-dimensional structural schematic diagram of the injection mechanism and the stirring mechanism proposed by the present invention; Fig. 9 It is a three-dimensional structural schematic diagram of the injection mechanism proposed by the present invention; Fig.10 A schematic diagram of the three-dimensional structure of the air intake box proposed by the present invention; Fig.11 It is a three-dimensional structural schematic diagram of the linkage mechanism proposed by the present invention; Fig.12 This is a schematic diagram of the three-dimensional structure of the driving motor and the water pump proposed in the present invention; Fig.13 It is a partial three-dimensional structural schematic diagram of the linkage mechanism proposed by the present invention; Fig.14 This is a schematic diagram of the three-dimensional structure of the connecting shaft and the rotating motor proposed by the present invention; Fig.15 This is a three-dimensional structural schematic diagram of the connecting shaft, rotating frame and rotating motor proposed by the present invention; Fig.16 A schematic diagram of the three-dimensional structure of the exhaust pipe and the top cap proposed by the present invention; Fig.17 This is a schematic diagram of the exploded three-dimensional structure of the exhaust pipe, top cap, spiral sheet and blades proposed by the present invention; Fig.18 A schematic diagram of the three-dimensional structure of the spiral sheet, the tie rod and the blades proposed in the present invention; Fig.19 This is a schematic diagram of the exploded three-dimensional structure of the water pump proposed by the present invention; Fig. 20 This is a schematic diagram of the cross-sectional structure of the explosion of the water pump proposed by the present invention.

[0019] In the figure: 1. air inlet box; 101. air inlet pipe; 102. air outlet pipe; 103. piston plate; 2. desulfurization tower; 201. connecting pipe; 3. denitrification tower; 301. exhaust pipe; 4. water pump; 401. rear cover; 402. impeller; 403. pump housing; 404. pump shaft; 405. front cover; 5. drive motor; 501. drive shaft; 502. rotating plate; 503. sliding frame; 504. counterweight plate; 505. ball bearing; 506. tension spring; 507. driving bevel gear; 508. driven bevel gear; 509. horizontal axis; 6. connecting shaft; 601. rotating frame; 602. guide rod; 603. square rod; 604. round rod; 605. connecting plate; 606. arc connecting rod; 607. rotating seat; 7. vertical frame; 701. fixed frame ;702, pull rope;703, fixed pulley;704, conical disk;7041, square protrusion;705, compression spring;706, connecting spring;8, one-way valve;801, rear valve body;802, fastening spring;803, sealing ball;804, front valve body;9, spray frame;901, connector;902, inlet pipe;903, injection elbow;904, mounting rod;905, vertical axis;906, stirring frame;907, mounting cylinder;908, fixing rod;10, controller;11, rotating motor;1101, small bevel gear;1102, large bevel gear;12, top cap;13, vertical rod;14, rotating ring;15, sulfur dioxide sensor;16, nitrogen oxide sensor;17, blade;18, pull rod;19, spiral blade. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] Reference Figure 1-Figure 20 , a post-processing device for ship exhaust gas, comprising: An air intake box 1, the two sides of which are connected to an air intake pipe 101 and an air outlet pipe 102, respectively, a piston plate 103 is installed in a sliding seal in the air intake box 1, and a controller 10, a drive motor 5 and two water pumps 4 are fixedly installed on the top of the air intake box 1, the drive motor 5 is used to drive the water pump 4 to operate, a rotating motor 11 is fixedly connected to the rear side of the air intake box 1, and the rotating motor 11 is used to drive the piston plate 103 to move up and down reciprocatingly, and a linkage mechanism is provided in the air intake box 1; Desulfurization tower 2, used for desulfurization of tail gas; The denitrification tower 3 is used to achieve the denitrification of exhaust gas. The desulfurization tower 2 and the denitrification tower 3 are both provided with an injection mechanism and a stirring mechanism. The desulfurization tower 2 and the denitrification tower 3 are connected by a connecting pipe 201, and the other side of the denitrification tower 3 is connected with an exhaust pipe 301. Sulfur dioxide sensors 15 and nitrogen oxide sensors 16 are fixedly installed on the inner walls of both sides of the exhaust pipe 301, respectively. The sulfur dioxide sensor 15, the nitrogen oxide sensor 16, the drive motor 5, and the rotating motor 11 are all electrically connected to the controller 10. When the sulfur dioxide sensor 15 and the nitrogen oxide sensor 16 detect that the sulfur dioxide or nitrogen oxide content exceeds the standard, the signal is transmitted to the controller 10. The controller 10 controls the speed of the drive motor 5 to increase and the speed of the rotating motor 11 to decrease according to the exceeding condition.

[0022] In this embodiment, the water pump 4 includes a rear cover 401, an impeller 402, a pump housing 403, a pump shaft 404 and a front cover 405. The front cover 405 and the rear cover 401 are fixedly mounted on the front and rear sides of the pump housing 403 by bolts, respectively, and the pump shaft 404 is rotatably connected in the pump housing 403, and the impeller 402 is fixedly mounted on the outside of the pump shaft 404. The top and bottom of the pump housing 403 are respectively provided with an outlet and an inlet. Two horizontal shafts 509 are rotatably installed on the top of the air intake box 1, one end of the two horizontal shafts 509 is fixedly connected to the corresponding pump shaft 404, and the other end of the horizontal shaft 509 is fixedly connected to a driven bevel gear 508. The output shaft of the driving motor 5 is fixedly connected to a driving shaft 501, and the driving shaft 501 is fixedly installed with a driving bevel gear 507 and a rotating plate 502. The two driven bevel gears 508 are meshed with the driving bevel gear 507.

[0023] In this embodiment, the linkage mechanism includes a connecting shaft 6, a conical disk 704, a fixed frame 701 and two vertical frames 7. The fixed frame 701 is fixedly installed in the air intake box 1, and the vertical frame 7 is slidably connected in the fixed frame 701. A connecting spring 706 is fixedly connected between the two vertical frames 7, and a rotating seat 607 is rotatably installed in the vertical frame 7. The connecting shaft 6 is slidably connected in the two rotating seats 607, and both ends of the connecting shaft 6 are fixedly connected with a rotating frame 601, a square rod 603 is slidably installed in the rotating frame 601, and the two sides of the two square rods 603 away from each other are fixedly connected with a round rod 604, and the top two sides of the piston plate 103 are hinged with connecting plates 605, and the two connecting plates 605 are respectively rotatably sleeved on the outer sides of the corresponding round rods 604, and the front and rear sides of the rotating seat 607 are rotatably connected with arc connecting rods 606, and the other end of the arc connecting rod 606 is rotatably connected to the corresponding square rod 603; The two vertical frames 7 are fixedly connected to the sides away from each other with a pull rope 702, and the top ends of the two pull ropes 702 are respectively fixedly connected to the two sides of the bottom of the conical disk 704, and the two sides of the conical disk 704 are integrally formed with square protrusions 7041, and the inner walls on both sides of the air intake box 1 are provided with square grooves, and the two square protrusions 7041 are respectively slidably connected in the corresponding square grooves, and the tops of the square protrusions 7041 are fixedly connected with compression springs 705, and the top ends of the compression springs 705 are fixedly connected to the top inner walls of the corresponding square grooves, and two fixed pulleys 703 are rotatably installed in the fixed frame 701, and the two pull ropes 702 are respectively wound around the outer sides of the corresponding fixed pulleys 703; Two sliding frames 503 are slidably sleeved on the outer side of the rotating plate, and a counterweight plate 504 is fixedly connected to the top of the sliding frame 503. A tension spring 506 is fixedly connected between the two counterweight plates 504. A groove is provided on the top of the counterweight plate 504, and a ball 505 is arranged in the groove. A conical groove with a concave middle and convex surroundings is provided at the bottom of the conical disk 704, and the two balls 505 are both movably abutted in the conical groove.

[0024] In this embodiment, a small bevel gear 1101 is fixedly connected to the output shaft of the rotating motor 11, and a large bevel gear 1102 is fixedly connected to the connecting shaft 6. The small bevel gear 1101 is meshed with the large bevel gear 1102, thereby conveniently driving the connecting shaft 6 to rotate, and the connecting shaft 6 slides in the rotating seat 607, and the rotating seat 607 rotates in the corresponding vertical frame 7, so that the connecting shaft 6 can also rotate stably, and the connecting shaft 6 is affected by the rotating frame 601, the square rod 603, the round rod 604 and the connecting plate 605 so that it cannot move left and right, so that the large bevel gear 1102 can maintain stable meshing with the small bevel gear 1101.

[0025] In this embodiment, a rotating ring 14 is rotatably installed on the outer side of the exhaust pipe 301, and two vertical rods 13 are fixedly connected to the top of the rotating ring 14. The top ends of the two vertical rods 13 are fixedly connected to top caps 12, and the bottom of the top cap 12 is fixedly installed with a spiral sheet 19. The bottom of the spiral sheet 19 is fixedly connected with a pull rod 18, and the bottom end of the pull rod 18 is fixedly connected with a blade 17.

[0026] In this embodiment, the model of the sulfur dioxide sensor 15 is SGA-400B-SO2, which performs full-range three-point temperature and humidity compensation through signal amplification, data processing and intelligent calculation, and uses high-precision standard gas for data calibration. Its advantages are small size, low price and stable performance; The model of nitrogen oxygen sensor 16 adopts Alphasense NOx sensor, which has high sensitivity to meet accurate monitoring and low power consumption to save energy.

[0027] In this embodiment, the spray mechanism includes a spray frame 9, a connecting head 901 and a plurality of spray bends 903. The spray bends 903 are connected to the bottom of the spray frame 9, and the bottom ends of the plurality of spray bends 903 on the right are bent forward, while the bottom ends of the plurality of spray bends 903 on the left are bent backward, so that the spray frame 9 can rotate in the opposite direction under the reaction of the liquid sprayed from the spray bends 903. The connecting head 901 is connected to the top of the spray frame 9, and an inlet pipe 902 is rotatably installed in the connecting pipe 201, and the other end of the inlet pipe 902 is connected to the corresponding outlet.

[0028] In this embodiment, the stirring mechanism includes a mounting cylinder 907, a vertical shaft 905 and two stirring frames 906, the two stirring frames 906 are respectively fixedly connected to the two ends of the vertical shaft 905, and the top of the stirring frame 906 is fixedly connected to the mounting rod 904, the top of the mounting rod 904 is fixedly connected to the bottom of the spray frame 9, the vertical shaft 905 is rotatably connected in the mounting cylinder 907, and the outer side of the vertical shaft 905 is fixedly sleeved with two limiting rings, the two limiting rings are movably abutted against the top and bottom of the mounting cylinder 907, and the inner walls on both sides of the denitrification tower 3 and the desulfurization tower 2 are fixedly connected with fixing rods 908, and the other end of the fixing rod 908 is fixedly connected to the corresponding mounting cylinder 907, thereby fixing the mounting cylinder 907.

[0029] In this embodiment, a one-way valve 8 is provided in both the air inlet pipe 101 and the air outlet pipe 102. The one-way valve 8 includes a rear valve body 801, a fastening spring 802, a sealing ball 803 and a front valve body 804. The rear valve body 801 and the front valve body 804 are fixed to each other. One end of the fastening spring 802 is fixedly connected to the inside of the rear valve body 801, and the other end of the fastening spring 802 is fixedly connected to the sealing ball 803. The sealing ball 803 is movably sealed against the inside of the front valve body 804. Under the action of the sealing ball 803 and the fastening spring 802, air can only flow from the right side of the one-way valve 8 to the left side, and cannot flow from the left side to the right side. The other end of the gas outlet pipe 102 is connected to the desulfurization tower 2.

[0030] In this embodiment, the two rotating frames 601 are close to each other and are therefore fixedly connected to two guide rods 602 , and the rotating seats 607 are slidably sleeved on the outer sides of the corresponding guide rods 602 .

[0031] In this embodiment, when in use, the air intake pipe 101 is connected to the exhaust port of the propagating exhaust gas, the inlet of the left water pump 4 is connected to the supply pipe of the alkaline solution (such as limestone, lime, alkali solution), and the inlet of the right water pump 4 is connected to the supply pipe of the reducing solution (such as urea solution), and then the driving motor 5 and the rotating motor 11 are started, the rotating motor 11 drives the small bevel gear 1101 to rotate, and the small bevel gear 1101 drives the connection to rotate by meshing with the large bevel gear 1102, the connecting shaft 6 drives the two rotating frames 601 and the two square rods 603 to rotate, thereby driving the two round rods 604 to perform circular motion, and the two round rods 604 drive the piston plate 103 to move upward reciprocatingly by cooperating with the corresponding connecting plate 605. When the piston plate 103 moves upward, a negative pressure is formed in the space below the piston plate 103 in the air intake box 1, so that the propagating exhaust gas enters the air intake pipe 101 and pushes the right sealing ball 803 to move to the left, and then enters the air intake box 1 through the one-way valve 8 on the right. When the exhaust gas moves downward, the exhaust gas pushes the sealing ball 803 on the left side and enters the desulfurization tower 2 through the one-way valve 8 on the left side, then flows into the denitration tower 3 through the connecting pipe 201, and finally is discharged through the exhaust pipe 301. At the same time, the driving motor 5 drives the driving shaft 501 to rotate. The driving shaft 501 drives the two horizontal shafts 509 to rotate through the meshing with the active bevel gear 507 and the two driven bevel gears 508. The two horizontal shafts 509 drive the corresponding pump shaft 404 and the impeller 402 to rotate, so as to extract the alkaline solution and the reducing solution, and introduce them into the two inlet pipes 902, and then introduce them into the two spray boxes through the corresponding connectors 901, and then spray them out from the corresponding injection elbow 903, so that the alkaline solution is sprayed into the desulfurization tower 2 and neutralizes the sulfur dioxide in the air therein to generate sulfate, thereby realizing the desulfurization of the exhaust gas, and the reducing solution is sprayed into the denitration tower 3, and reacts with the nitrogen oxides in the air to reduce them into nitrogen and water, thereby achieving the effect of denitration; When the liquid is sprayed out from the injection elbow 903, the reverse thrust of the liquid drives the spray box to rotate, so that the liquid is sprayed in different directions, improving the uniformity of spraying. At the same time, the spray box drives the stirring frame 906 to rotate through the mounting rod 904, so as to stir the liquid and air and make them fully mixed and reacted, thereby improving the efficiency of desulfurization and denitrification. During the process of the treated exhaust gas being discharged from the exhaust pipe 301, the sulfur dioxide and nitrogen oxide contents in the air are monitored by the sulfur oxide sensor and the nitrogen oxide sensor 16. At the same time, when the exhaust gas is discharged from the top of the exhaust port, the spiral blade 19 is driven to rotate by the aerodynamic force, and the blade 17 is driven to rotate by the pull rod 18, so as to stir and disperse the flue gas, so that the exhaust gas can fully contact with the sulfur oxide sensor and the nitrogen oxide sensor 16, thereby improving the monitoring accuracy. The sulfur oxide sensor and the nitrogen oxide sensor 16 transmit the monitored sulfur dioxide and nitrogen oxide contents to the controller 10. When the controller 10 analyzes that the content of one of the sulfur dioxide and nitrogen oxide exceeds the standard, the controller 10 controls the driving motor according to the exceeding condition. The speed of the machine 5 is increased, and the speed of the rotating motor 11 is reduced. The speed of the driving motor 5 is increased, so that the rotation speed of the pump shaft 404 and the impeller 402 is increased, and the extraction speed of the alkaline solution and the reducing solution is increased, so that the amount of the alkaline solution and the reducing solution can be increased to improve the desulfurization and denitration effect, and the increase in the injection speed of the solution will also increase the stirring speed of the stirring frame 906, thereby further improving the reaction desulfurization and denitration effect. At the same time, the speed of the rotating motor 11 is reduced, which will reduce the speed of the piston plate 103 moving up and down and the speed of the exhaust gas introduced into the air intake box 1, so that less exhaust gas is poured in per unit time to facilitate thorough desulfurization and denitration treatment and avoid residues. During the rotation of the driving shaft 501, the rotating plate 502 is driven to rotate, and the sliding frame 503 and the counterweight plate 504 are driven to perform circular motion. While performing circular motion, the counterweight plate 504 is moved away from each other under the action of centrifugal force, and pushes the tension spring 506 to pull the rope 702. The contact between the ball 505 and the conical groove pushes the conical disk 704 to move upward, and compresses the compression spring 705. The conical disk 704 drives the two vertical frames 7 to move away from each other through the two pull ropes 702, and stretches the connecting spring 706, thereby balancing the counterweight plate 504 through the connecting spring 706, the compression spring 705 and the tension spring 506. Centrifugal force, and the two vertical frames 7 move away from each other, while driving the two rotating seats 607 to move away from each other. The two rotating seats 607 respectively drive the square rod 603 to slide in the rotating frame 601 through the cooperation of the corresponding arc-shaped connecting rods 606, so that the round rod 604 is close to the connecting shaft 6. When the speed of the driving motor 5 is increased and the centrifugal force on the counterweight becomes larger, the round rod 604 is further close to the connecting shaft 6, thereby reducing the radius of its circular motion, thereby reducing the amount of gas extracted at a single time during the up and down movement of the piston plate 103, thereby achieving the effect of further reducing the exhaust gas extraction amount to ensure sufficient and thorough desulfurization and denitrification; When the controller 10 analyzes that the contents of sulfur dioxide and nitrogen oxides are far lower than the required values, the speed of the driving motor 5 is controlled to be appropriately reduced and the speed of the rotating motor 11 is appropriately increased, thereby reducing the injection amount of the alkaline solution and the reducing solution while increasing the exhaust gas introduction speed, thereby reducing the solution effect and increasing the exhaust gas treatment speed when the exhaust gas pollution is relatively small.

[0032] The above is a detailed introduction to a post-treatment device for ship exhaust provided by the present invention. Specific embodiments are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A post-treatment device for ship exhaust gas, characterized in that: include: An air intake box (1), wherein both sides of the air intake box (1) are respectively connected to an air intake pipe (101) and an air outlet pipe (102), a piston plate (103) is installed in a sliding seal inside the air intake box (1), and a controller (10), a drive motor (5) and two water pumps (4) are fixedly installed on the top of the air intake box (1), wherein the drive motor (5) is used to drive the water pump (4) to operate, a rotating motor (11) is fixedly connected to the rear side of the air intake box (1), and the rotating motor (11) is used to drive the piston plate (103) to move reciprocatingly up and down, and a linkage mechanism is arranged inside the air intake box (1); A desulfurization tower (2), used for desulfurizing the tail gas; A denitration tower (3) is used to achieve denitration of tail gas. The denitration tower (2) and the denitration tower (3) are both provided with an injection mechanism and a stirring mechanism. A connecting pipe (201) is connected between the denitration tower (2) and the denitration tower (3), and the other side of the denitration tower (3) is connected with an exhaust pipe (301). A sulfur dioxide sensor (15) and a nitrogen oxide sensor (16) are respectively fixedly mounted on the inner walls of both sides of the exhaust pipe (301). The sulfur dioxide sensor (15), the nitrogen oxide sensor (16), the drive motor (5), and the rotating motor (11) are all electrically connected to the controller (10). When the sulfur dioxide sensor (15) and the nitrogen oxide sensor (16) detect that the sulfur dioxide or nitrogen oxide content exceeds a standard, the signal is transmitted to the controller (10). The controller (10) controls the speed of the drive motor (5) to increase and the speed of the rotating motor (11) to decrease according to the exceeding condition.

2. A post-treatment device for ship exhaust gas according to claim 1, characterized in that: The water pump (4) comprises a rear cover (401), an impeller (402), a pump housing (403), a pump shaft (404) and a front cover (405); the front cover (405) and the rear cover (401) are respectively fixedly mounted on the front and rear sides of the pump housing (403) by bolts, and the pump shaft (404) is rotatably connected in the pump housing (403); the impeller (402) is fixedly mounted on the outside of the pump shaft (404); and the top and bottom of the pump housing (403) are respectively provided with an outlet and an inlet; Two transverse shafts (509) are rotatably mounted on the top of the air intake box (1), one end of the two transverse shafts (509) is fixedly connected to the corresponding pump shaft (404), and the other end of the transverse shaft (509) is fixedly connected to a driven bevel gear (508). The output shaft of the drive motor (5) is fixedly connected to a drive shaft (501), and a driving bevel gear (507) and a rotating plate (502) are fixedly mounted on the drive shaft (501), and the two driven bevel gears (508) are meshed with the driving bevel gear (507).

3. A post-treatment device for ship exhaust gas according to claim 1, characterized in that: The linkage mechanism comprises a connecting shaft (6), a conical disk (704), a fixed frame (701) and two vertical frames (7); the fixed frame (701) is fixedly mounted in the air intake box (1), and the vertical frames (7) are slidably connected in the fixed frame (701); a connecting spring (706) is fixedly connected between the two vertical frames (7); and a rotating seat (607) is rotatably mounted in the vertical frames (7); The connecting shaft (6) is slidably connected in the two rotating seats (607), and both ends of the connecting shaft (6) are fixedly connected to a rotating frame (601), a square rod (603) is slidably installed in the rotating frame (601), and the two sides of the two square rods (603) that are away from each other are fixedly connected to a round rod (604), and the top two sides of the piston plate (103) are hinged with connecting plates (605), and the two connecting plates (605) are respectively rotatably sleeved on the outer sides of the corresponding round rods (604), and the front and rear sides of the rotating seat (607) are rotatably connected to arc-shaped connecting rods (606), and the other end of the arc-shaped connecting rod (606) is rotatably connected to the corresponding square rod (603); The two vertical frames (7) are fixedly connected to a pull rope (702) on the side away from each other, the top ends of the two pull ropes (702) are respectively fixedly connected to the two sides of the bottom of the conical disk (704), and the two sides of the conical disk (704) are integrally formed with square protrusions (7041), the inner walls on both sides of the air intake box (1) are provided with square grooves, the two square protrusions (7041) are respectively slidably connected in the corresponding square grooves, and the tops of the square protrusions (7041) are fixedly connected with compression springs (705), and the top ends of the compression springs (705) are fixedly connected to the top inner walls of the corresponding square grooves, two fixed pulleys (703) are rotatably installed in the fixed frame (701), and the two pull ropes (702) are respectively wound around the outer sides of the corresponding fixed pulleys (703); Two sliding frames (503) are slidably sleeved on the outer side of the rotating plate, a counterweight plate (504) is fixedly connected to the top of the sliding frame (503), a tension spring (506) is fixedly connected between the two counterweight plates (504), a groove is provided on the top of the counterweight plate (504), a ball bearing (505) is arranged in the groove, and a conical groove with a concave middle and convex surroundings is provided at the bottom of the conical disk (704), and the two ball bearings (505) are movably abutted in the conical groove.

4. A post-treatment device for ship exhaust gas according to claim 3, characterized in that: A small bevel gear (1101) is fixedly connected to the output shaft of the rotating motor (11), a large bevel gear (1102) is fixedly connected to the connecting shaft (6), and the small bevel gear (1101) is meshed with the large bevel gear (1102).

5. The post-treatment device for ship exhaust gas according to claim 1, characterized in that: A rotating ring (14) is rotatably mounted on the outer side of the exhaust pipe (301); two vertical rods (13) are fixedly connected to the top of the rotating ring (14); top ends of the two vertical rods (13) are fixedly connected to top caps (12); a spiral sheet (19) is fixedly mounted on the bottom of the top cap (12); a pull rod (18) is fixedly connected to the bottom of the spiral sheet (19); and a blade (17) is fixedly connected to the bottom end of the pull rod (18).

6. A post-treatment device for ship exhaust gas according to claim 1, characterized in that: The sulfur dioxide sensor (15) is of the model SGA-400B-SO2, which performs full-range three-point temperature and humidity compensation through signal amplification, data processing and intelligent calculation, and uses high-precision standard gas for data calibration. It has the advantages of small size, low price and stable performance. The nitrogen oxygen sensor (16) adopts the Alphasense NOx sensor, which has high sensitivity to meet the requirements of accurate monitoring and low power consumption, thus saving energy.

7. A post-processing device for ship exhaust gas according to claim 2, characterized in that: The spray mechanism comprises a spray frame (9), a connecting head (901) and a plurality of spray bends (903); the spray bends (903) are connected to the bottom of the spray frame (9), and the bottom ends of the plurality of spray bends (903) located on the right are bent forward, while the bottom ends of the plurality of spray bends (903) located on the left are bent backward, so that the spray frame (9) can rotate in the opposite direction under the reaction of liquid sprayed from the spray bends (903); the connecting head (901) is connected to the top of the spray frame (9), and an introduction pipe (902) is rotatably installed in the connecting pipe (201); the other end of the introduction pipe (902) is connected to the corresponding outlet.

8. A post-treatment device for ship exhaust gas according to claim 7, characterized in that: The stirring mechanism comprises a mounting cylinder (907), a vertical shaft (905) and two stirring frames (906), the two stirring frames (906) being fixedly connected to the two ends of the vertical shaft (905), and the top of the stirring frame (906) being fixedly connected to a mounting rod (904), the top of the mounting rod (904) being fixedly connected to the bottom of the spray frame (9), the vertical shaft (905) being rotatably connected in the mounting cylinder (907), and the outer side of the vertical shaft (905) being fixedly sleeved with two limiting rings, the two limiting rings being movably abutted against the top and bottom of the mounting cylinder (907), and the inner walls on both sides of the denitration tower (3) and the desulfurization tower (2) being fixedly connected to fixing rods (908), the other ends of the fixing rods (908) being fixedly connected to the corresponding mounting cylinder (907).

9. The post-treatment device for ship exhaust gas according to claim 1, characterized in that: A one-way valve (8) is provided in each of the air inlet pipe (101) and the air outlet pipe (102), the one-way valve (8) comprising a rear valve body (801), a fastening spring (802), a sealing ball (803) and a front valve body (804), the rear valve body (801) and the front valve body (804) being fixed to each other, one end of the fastening spring (802) being fixedly connected to the interior of the rear valve body (801), and the other end of the fastening spring (802) being fixedly connected to the sealing ball (803), and the sealing ball (803) being movably sealed against the interior of the front valve body (804); The other end of the gas outlet pipe (102) is in communication with the desulfurization tower (2).

10. The post-treatment device for ship exhaust gas according to claim 3, characterized in that: The two rotating frames (601) are close to each other and are therefore fixedly connected to two guide rods (602), and the rotating seats (607) are slidably sleeved on the outer sides of the corresponding guide rods (602).

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