Granulation tower dust efficient recovery device and method

Abstract

The invention discloses a granulation tower dust efficient recovery device and method, and relates to the technical field of urea granulation tower production, the granulation tower dust efficient recovery device comprises a base, a lifting plate is arranged on a supporting frame above the base, a pressurizing cylinder is installed on the bottom side of the middle of the lifting plate, and when a pressurizing piston moves upwards, spinning dust gas is introduced into the pressurizing cylinder, so that the dust is efficiently recovered; when a pressurizing piston moves downwards, cyclone dust gas can be compressed, the compressed dust gas enters a flow dividing cover at a high speed and then is sprayed out at a high speed through a flow dividing pipe, dilute urea liquid and free-state ammonia are mixed under the cooperation of airflow operation, dust degradation and fusion are achieved, and in the gas spraying state, the gas is sprayed out at a high speed, so that the dust is degraded and fused. The mixing degree of diluted urea liquid and dust can be improved, meanwhile, in the high-speed movement process, the dust cannot be accumulated in a conveying pipeline, blockage cannot be caused, the maintenance cost is reduced, and the dust collecting effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of urea granulation tower production, and in particular to a granulation tower dust efficient recovery device and method. Background Art

[0002] Urea granulation tower is a large reinforced concrete structure for manufacturing granular fertilizer in the fertilizer production process. In the urea granulation tower, molten urea is sprayed from the nozzle on the top of the tower, cooled by air and condensed into granular urea. Granular urea undergoes a series of process treatments in the tower and is finally discharged through the bottom discharge port. The dust in the urea granulation tower mainly comes from the tail gas generated in the urea production process. The tail gas contains incompletely reacted urea and other impurities. After cooling and solidification, part of the urea exists in the tail gas in the form of dust. Urea dust is an amorphous particle with a certain amount of free ammonia.

[0003] For example, application number: CN 208003657 U. The invention discloses an ultra-clean urea granulation tower dust recovery device, comprising a granulation tower, a tower top induced draft hood, an induced draft duct, a dust recovery tower arranged on the ground, a filter, a circulating pump, an induced draft fan and a steel chimney; a tower top induced draft hood is arranged on the top of the granulation tower, and the interior of the dust recovery tower is provided with tower bottom washing liquid, a gas inlet distributor, a liquid distribution tower plate, a high-efficiency washing component, a liquid distribution component, a spray atomization system, a wire mesh demisting component, a wire mesh self-cleaning component, a high-efficiency demisting device lower spray system, a high-efficiency demisting device, a high-efficiency demisting device upper spray system and an air outlet from bottom to top; a wire mesh pressure difference monitoring system and a demisting pressure difference monitoring system are arranged outside the dust recovery tower. The utility model can thoroughly solve the problems of large running resistance, substandard dust emission, large amount of liquid carried by dust-containing gas, etc. in the traditional urea granulation tower dust control method, and efficiently control and recover the granulation tower dust to achieve the goal of energy saving and emission reduction.

[0004] Based on the search of the above patents and combined with the equipment in the prior art, it is found that when dust is recovered, dust treatment is generally carried out through a bag dust collector, and a large amount of ammonia contained in the dust gas is wasted. At the same time, the dust collector has high maintenance costs and poor recovery efficiency of free ammonia. Therefore, a granulation tower dust efficient recovery device and method is needed. Summary of the invention

[0005] The purpose of the present invention is to provide a device and method for efficiently recovering dust from a granulation tower, so as to solve the following technical problems: a large amount of ammonia contained in the dust gas is wasted when dust is treated by a bag filter, and the dust collector has high maintenance costs and poor recovery efficiency of free ammonia. The present invention can improve the degree of fusion between dilute urea liquid and dust in a gas jet state, and during high-speed movement, dust will not accumulate in the conveying pipeline and will not cause blockage, thereby reducing maintenance costs and improving the dust collection effect.

[0006] The purpose of the present invention can be achieved by the following technical solutions: A highly efficient dust recovery device for a granulation tower comprises a base, a supporting frame above the base is provided with a hanging plate, a pressurizing cylinder is installed on the middle bottom side of the hanging plate, a storage tank and a transfer tank are also fixed to the bottom of the hanging plate, and the storage tank and the transfer tank are respectively arranged on both sides of the pressurizing cylinder.

[0007] A pressurizing piston is movably arranged inside the pressurizing cylinder. A swing hole is opened in the middle of the lifting plate, a support frame is installed on the swing hole, two rotating wheels are installed on the support frame through a rotating shaft, and a positioning shaft is connected to the opposite sides of the eccentric positions of the two rotating wheels.

[0008] A crank connecting rod is rotatably connected to the middle position of the top side of the pressurizing piston through a pin shaft, and a rotating ring is fixed to the top end of the crank connecting rod, and the rotating ring is sleeved on the outside of the positioning shaft.

[0009] A flow diverter hood is connected to the bottom of the pressurizing cylinder, and a limiting cylinder is fixed to the bottom side of the flow diverter hood.

[0010] Stamping piston, the top port of the limit cylinder is located in the diverter cover, a spring is vertically installed inside the limit cylinder, a piston rod is movably inserted inside the limit cylinder, the piston rod is located at the top of the spring, a stamping piston is fixed to the top of the piston rod, and the stamping piston is located at the connection between the pressurizing cylinder and the diverter cover.

[0011] As a further solution of the present invention: the bottom diameter of the pressurizing cylinder and the diameter of the diverter hood are both larger than the diameter of the connecting position of the pressurizing cylinder and the diverter hood, which can ensure that after the stamping piston moves, the gas can be discharged from the separation gap to achieve the circulation of dust gas.

[0012] As a further solution of the present invention: a mixing cylinder is arranged on the top side of the base, a fixing cap is embedded in the middle position of the top of the mixing cylinder, a breathable membrane is arranged inside the mixing cylinder, the breathable membrane is located between the outer wall of the fixing cap and the inner wall of the mixing cylinder, an assembly groove opening downward is provided in the fixing cap, a scraping motor is installed in the assembly groove, a rotating disk is installed on the output shaft of the scraping motor, a scraper is installed on the circumferential outer side of the rotating disk, and the side edge of the scraper is in close contact with the bottom side of the breathable membrane.

[0013] As a further solution of the present invention: the exhaust pipe is connected to the mixing cylinder through a diverter pipe, the bottom end of the diverter pipe penetrates the top side wall and the breathable membrane of the mixing cylinder, the top of the mixing cylinder is connected with an exhaust pipe, and the interface of the exhaust pipe is located on the top side of the breathable membrane. Due to the pressure difference between the upper and lower sides of the scraper, the high-pressure injected gas has a better filtering effect, and the filtered gas is discharged through the exhaust pipe, thereby completing the efficient recovery of dust.

[0014] As a further solution of the present invention: an annular connecting pipe is arranged on the top side of the mixing cylinder, the annular connecting pipe is connected to the shunt pipe through a liquid separator, the bottom side of the storage tank is connected to the annular connecting pipe through a mainstream pipe, a rotating motor is installed on the top side of the hanging plate, the output shaft of the rotating motor passes through the top side of the hanging plate, a connecting disk is installed on the output shaft of the rotating motor, a rotating wire is connected to the bottom side of the connecting disk, an air intake pipe is connected to the top of the transfer tank, and the dust gas is ejected at a high speed through the shunt pipe, the dilute urea liquid in the storage tank is transported through the annular connecting pipe, and is transported to the shunt pipe through the liquid separator, and under the cooperation of the airflow operation, the dilute urea liquid is mixed with free ammonia to realize the degradation and fusion of dust, and in the gas jet state, the fusion degree of the dilute urea liquid and the dust can be improved, and at the same time, during the high-speed movement, the dust will not be accumulated in the conveying pipeline, will not cause blockage, thereby reducing the maintenance cost and improving the dust collection effect.

[0015] As a further solution of the present invention: the bottom of the transfer tank is connected to an air inlet pipe, the bottom side of the pressurizing cylinder is connected to a connecting cylinder, a limiting ring is fixed on the middle inner wall of the connecting cylinder, a push rod is movably arranged in the connecting cylinder, the top of the push rod is connected to a sealing cap, the sealing cap is located at the top port position of the connecting cylinder, and the diameter of the sealing cap is larger than the port diameter of the connecting cylinder, a limiting cross bar is vertically fixed to the bottom of the push rod, the limiting cross bar is located on the bottom side of the limiting ring, the bottom end of the air inlet pipe is connected to the bottom end of the connecting cylinder, which can realize one-way circulation of dust gas and ensure the stability of gas compression to cooperate with the pressurized transportation of the dust airflow.

[0016] S1: Cyclone acceleration: The waste gas generated by the granulation tower enters the transfer tank through the air inlet pipe, which can accelerate the cyclone of the waste gas, ensure that the dust gas is in a cyclonic state, and avoid dust precipitation.

[0017] S2: Acceleration and compression: The dust gas is accelerated by pressurization, and the cyclone dust gas in the transfer tank is compressed and ejected by the reciprocating motion of the pressurization piston in the pressurization cylinder.

[0018] S3: Spray dissolution: The pressurized dust gas is sprayed out at high speed. The fusion agent for spray dissolution is 10%~20% dilute urea liquid, which can bring out the fusion agent under the action of gas pressure. During the spraying process, the fusion agent and dust are fused to achieve dust reduction operation. At the same time, with the cooperation of high-speed jet, they can be fully fused.

[0019] S4: Filtration and separation: After high-pressure injection, the fusion liquid will fall to the bottom of the mixing tube, the gas will be filtered through the breathable membrane and then discharged, and the dust remaining on the breathable membrane will fall into the fusion liquid and be mixed and decomposed.

[0020] S5: Mixed extraction: After the dust is mixed with the fusion agent, it is extracted and reused.

[0021] Beneficial effects of the present invention: During the product transportation process, the spun dust gas is introduced into the pressurizing cylinder when the pressurizing piston moves upward. When the pressurizing piston moves downward, the cyclonic dust gas can be compressed. After compression, the dust gas enters the diverter hood at high speed, and then is ejected at high speed through the diverter pipe. With the cooperation of airflow operation, the dilute urea liquid and free ammonia are mixed to achieve dust degradation and fusion. In the gas jet state, the fusion degree of dilute urea liquid and dust can be improved. At the same time, during high-speed movement, dust will not accumulate in the conveying pipeline and will not cause blockage, thereby reducing maintenance costs and improving dust collection effects.

[0022] The mixed fusion liquid is sprayed into the mixing tube, and the remaining unmixed dust gas is filtered through the breathable membrane. The dust is filtered through the breathable membrane. Due to the pressure difference between the upper and lower sides of the scraper, the high-pressure sprayed gas has a better filtering effect. The filtered gas is discharged through the exhaust pipe to complete the efficient recovery of dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] Figure 1 It is a schematic diagram of the overall first three-dimensional structure of the present invention.

[0025] Figure 2 It is a schematic diagram of the overall second three-dimensional structure of the present invention.

[0026] Figure 3 It is a schematic diagram of the top structure of the present invention.

[0027] Figure 4 yes Figure 3 Schematic diagram of the AA section structure along the middle edge.

[0028] Figure 5 It is a schematic diagram of the internal structure of the integral mixing cylinder.

[0029] Figure 6 yes Figure 2 Schematic diagram of the structure of area A.

[0030] Figure 7 It is a schematic diagram of the transfer tank structure.

[0031] In the figure: 1, base, 2, lifting plate, 3, pressurizing cylinder, 4, storage tank, 5, transfer tank, 6, liquid inlet pipe, 7, annular connecting pipe, 8, exhaust pipe, 9, mixing cylinder, 10, air inlet pipe, 11, rotating motor, 12, support frame, 13, rotating wheel, 14, lifting motor, 15, stamping piston, 16, piston rod, 17, spring, 18, diverter cover, 19, diverter pipe, 20, limit cylinder, 21, breathable membrane, 22, scraper, 23, scraping motor, 24, fixing cap, 25, rotating disk, 51, rotating wire, 52, connecting disk, 121, rotating ring, 122, positioning shaft, 123, crank connecting rod, 124, pressurizing piston, 31, connecting cylinder, 32, limit cross bar, 33, limit ring, 34, push rod, 35, air inlet pipe, 36, sealing cap. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figure 1-5 As shown, the present invention is a granulation tower dust high-efficiency recovery device, comprising a base 1, a supporting frame above the base 1 is provided with a hanging plate 2, a pressurizing cylinder 3 is installed on the middle bottom side of the hanging plate 2, a storage tank 4 and a transfer tank 5 are also fixed to the bottom of the hanging plate 2, and the storage tank 4 and the transfer tank 5 are respectively arranged on both sides of the pressurizing cylinder 3.

[0034] A pressurizing piston 124 is movably provided inside the pressurizing cylinder 3. A swing hole is opened in the middle of the lifting plate 2, and a support frame 12 is installed on the swing hole. Two rotating wheels 13 are installed on the support frame 12 through a rotating shaft, and a positioning shaft 122 is connected to the opposite sides of the eccentric positions of the two rotating wheels 13.

[0035] The crank connecting rod 123 is rotatably connected to the middle position of the top side of the pressurizing piston 124 via a pin shaft. A rotating ring 121 is fixed to the top end of the crank connecting rod 123 , and the rotating ring 121 is sleeved on the outside of the positioning shaft 122 .

[0036] A flow divider cover 18 is connected to the bottom of the pressurizing cylinder 3 , and a limiting cylinder 20 is fixed to the bottom side of the flow divider cover 18 .

[0037] The stamping piston 15, the top port of the limiting cylinder 20 is located in the diverter cover 18, the spring 17 is vertically installed inside the limiting cylinder 20, the piston rod 16 is movably inserted inside the limiting cylinder 20, the piston rod 16 is located at the top of the spring 17, the stamping piston 15 is fixed to the top of the piston rod 16, and the stamping piston 15 is located at the connection between the pressurizing cylinder 3 and the diverter cover 18.

[0038] The bottom diameter of the pressurizing cylinder 3 and the diameter of the diverter hood 18 are both larger than the diameter of the connection position of the pressurizing cylinder 3 and the diverter hood 18. During operation, since urea dust is an amorphous particle with a certain amount of free ammonia, the free ammonia can be dissolved and reused during recovery. During the dissolution operation, the lifting motor 14 operates to drive the rotating wheel 13 to rotate, and drives the positioning shaft 122 to rotate. With the cooperation of the rotating ring 121, the crank connecting rod 123 can be pulled to move. During the movement of the crank connecting rod 123, the pressurizing piston 124 can move up and down in the pressurizing cylinder 3.

[0039] When the pressurizing piston 124 moves upward, the spun dust gas is introduced into the pressurizing cylinder 3. When the pressurizing piston 124 moves downward, the cyclonic dust gas can be compressed. After compression, as the pressure increases, the stamping piston 15 at the bottom is pushed downward. When the stamping piston 15 moves into the diverter hood 18, the dust gas enters the diverter hood 18 at high speed, and then is ejected at high speed through the diverter pipe 19.

[0040] An annular connecting pipe 7 is provided on the top side of the mixing tube 9, and the annular connecting pipe 7 is connected to the flow dividing pipe 19 through a liquid dividing pipe, and the bottom side of the material storage tank 4 is connected to the annular connecting pipe 7 through a main flow pipe.

[0041] When the dust gas is ejected at high speed through the shunt pipe 19, the dilute urea liquid in the storage tank 4 is transported through the annular connecting pipe 7 and transported to the shunt pipe 19 through the liquid dividing pipe. Under the cooperation of the air flow operation, the dilute urea liquid is mixed with the free ammonia to achieve the degradation and fusion of the dust. In the gas jet state, the fusion degree of the dilute urea liquid and the dust can be improved. At the same time, during the high-speed movement, the dust will not be accumulated in the transport pipeline, and will not cause blockage, thereby reducing the maintenance cost and improving the dust collection effect.

[0042] See also Figure 2 , 5As shown, a mixing cylinder 9 is mounted on the top side of the base 1, and a fixing cap 24 is embedded in the middle position of the top of the mixing cylinder 9. A breathable membrane 21 is arranged inside the mixing cylinder 9, and the breathable membrane 21 is located between the outer wall of the fixing cap 24 and the inner wall of the mixing cylinder 9. A mounting groove opening downward is provided in the fixing cap 24, and a scraping motor 23 is mounted in the mounting groove. A rotating disk 25 is mounted on the output shaft of the scraping motor 23, and a scraper 22 is mounted on the circumferential outer side of the rotating disk 25, and the side edge of the scraper 22 is in close contact with the bottom side of the breathable membrane 21. The exhaust pipe 8 is connected to the mixing cylinder 9 through a shunt pipe 19, and the bottom end of the shunt pipe 19 passes through the top side wall of the mixing cylinder 9 and the breathable membrane 21. The top of the mixing cylinder 9 is connected with an exhaust pipe 8, and the interface of the exhaust pipe 8 is located on the top side of the breathable membrane 21. During operation, after the mixed flow is sprayed, the mixed fusion liquid is sprayed in the mixing tube 9, the mixed liquid is fused and discharged through the connecting pipe at the bottom of the mixing tube 9, and the remaining unmixed dust gas is filtered through the air permeable membrane 21, and the dust is filtered through the air permeable membrane 21. After the filtration is completed, the filtered and dust-removed gas is discharged through the exhaust pipe 8. With the cooperation of the scraping motor 23, the rotating disk 25 can be driven to operate, and the scraper 22 can be driven to rotate, so that the dust on the bottom side of the air permeable membrane 21 can be cleaned, and the dust falls into the mixed liquid at the bottom of the mixing tube 9, which can realize efficient dust recovery. Secondly, the penetration and filtration effect of the air permeable membrane 21 is guaranteed, and the maintenance cost is reduced. Due to the pressure difference between the upper and lower sides of the scraper 22, the gas injected under high pressure has a better filtering effect, and the filtered gas is discharged through the exhaust pipe 8, thereby completing the efficient recovery of dust.

[0043] See also Figure 7 As shown, a rotating motor 11 is installed on the top side of the lifting plate 2, and the output shaft of the rotating motor 11 passes through the top side of the lifting plate 2. A connecting disk 52 is installed on the output shaft of the rotating motor 11, and a rotating wire 51 is connected to the bottom side of the connecting disk 52. The top of the transfer tank 5 is connected to the air intake pipe 10. During operation, after the dust gas is discharged, the rotating motor 11 operates to drive the connecting disk 52 to rotate, and can drive the rotating wire 51 to rotate in the transfer tank 5. With the rotation cooperation of the rotating wire 51, the rotating flow of the dust gas can be realized, the rotation of the dust gas can be ensured, and the flow of the dust gas can be accelerated at the same time, the free precipitation and accumulation of dust can be reduced, and the blockage of equipment can be avoided, which can ensure that the dust gas can be effectively transported and exported during processing.

[0044] See also Figure 6As shown, the bottom of the transfer tank 5 is connected to an air intake pipe 35, the bottom side of the pressurizing cylinder 3 is connected to a connecting cylinder 31, a limiting ring 33 is fixed on the middle inner wall of the connecting cylinder 31, a push rod 34 is movably arranged in the connecting cylinder 31, the top of the push rod 34 is connected to a sealing cap 36, the sealing cap 36 is located at the top port position of the connecting cylinder 31, and the diameter of the sealing cap 36 is larger than the port diameter of the connecting cylinder 31, a limiting cross bar 32 is vertically fixed to the bottom of the push rod 34, the limiting cross bar 32 is located on the bottom side of the limiting ring 33, and the bottom end of the air intake pipe 35 is connected to the bottom end of the connecting cylinder 31. During gas pressurization, when the pressurizing piston 124 moves upward, the expansion action of the spring 17 at the bottom of the piston rod 16 can lift the piston 15 and close the channel between the pressurizing cylinder 3 and the diverter hood 18. When the pressurizing cylinder 3 is inhaled, the gas in the transfer tank 5 is transported to the connecting cylinder 31 through the air intake pipe 35. When the sealing cap 36 at the top port of the connecting cylinder 31 is lifted, the cyclone dust gas can be sucked into the pressurizing cylinder 3. By setting a limiting cross bar 32 and a limiting ring 33, the push rod 34 can be prevented from falling off. When the pressurizing piston 124 is in a downward pressurizing operation, the pressurizing cylinder 3 can be closed to cooperate with the pressurized acceleration jet of the dust gas.

[0045] A method for efficiently recovering dust from a granulation tower comprises the following steps: S1: Cyclone acceleration: The waste gas generated by the granulation tower enters the transfer tank 5 through the air inlet pipe 10, which can realize the accelerated cyclone of the waste gas, ensure that the dust gas is in a cyclonic state, and avoid dust precipitation.

[0046] S2: Acceleration and compression: The dust gas is accelerated by pressurization, and the cyclone dust gas in the transfer tank 5 is compressed and ejected by the reciprocating motion of the pressurizing piston 124 in the pressurizing cylinder 3.

[0047] S3: Spray dissolution: The pressurized dust gas is sprayed out at high speed, which can bring out the fusion agent under the action of gas pressure. The fusion agent for spray dissolution is 10%~20% dilute urea solution. During the spraying process, the fusion agent and dust are fused to achieve dust reduction operation. At the same time, with the cooperation of high-speed jet, they can be fully fused.

[0048] S4: Filtration and separation: After high-pressure injection, the fusion liquid will fall to the bottom of the mixing tube 9, the gas will be filtered through the air permeable membrane 21 and then discharged, and the dust remaining in the air permeable membrane 21 will fall into the fusion liquid and be mixed and decomposed.

[0049] S5: Mixed extraction: After the dust is mixed with the fusion agent, it is extracted and reused.

[0050] During operation, after the dust gas is discharged, the rotating motor 11 operates to drive the connecting disk 52 to rotate, which can drive the rotating wire 51 to rotate in the transfer tank 5. With the rotation cooperation of the rotating wire 51, the rotation flow of the dust gas can be realized, which can ensure the rotation of the dust gas and accelerate the flow of the dust gas at the same time, reduce the free precipitation and accumulation of dust, avoid clogging of equipment, and ensure that the dust gas can be effectively transported and exported during processing.

[0051] Since urea dust is an amorphous particle with a certain amount of free ammonia, the free ammonia can be dissolved and reused during recovery. During the dissolution operation, the lifting motor 14 operates to drive the rotating wheel 13 to rotate, and drives the positioning shaft 122 to rotate. With the cooperation of the rotating ring 121, the crank connecting rod 123 can be pulled to move. During the movement of the crank connecting rod 123, the pressurizing piston 124 can move up and down in the pressurizing cylinder 3.

[0052] When the pressurizing piston 124 moves upward, the spun dust gas is introduced into the pressurizing cylinder 3. Under the expansion action of the spring 17 at the bottom of the piston rod 16, the stamping piston 15 can be lifted to close the channel between the pressurizing cylinder 3 and the diverter hood 18. When the pressurizing cylinder 3 is inhaled, the gas in the transfer tank 5 is transported to the connecting cylinder 31 through the intake pipe 35. When the sealing cap 36 at the top port of the connecting cylinder 31 is lifted, the cyclone dust gas can be sucked into the pressurizing cylinder 3. By setting a limiting cross bar 32 and a limiting ring 33, the push rod 34 can be prevented from falling off. When the pressurizing piston 124 is pressurized downward, the pressurizing cylinder 3 can be closed to cooperate with the pressurized acceleration jet of the dust gas.

[0053] When the pressurizing piston 124 moves downward, the cyclonic dust gas can be compressed. After compression, as the pressure increases, the stamping piston 15 at the bottom is pushed downward. When the stamping piston 15 moves into the diverter hood 18, the dust gas enters the diverter hood 18 at high speed and is then ejected at high speed through the diverter pipe 19.

[0054] An annular connecting pipe 7 is provided on the top side of the mixing tube 9, and the annular connecting pipe 7 is connected to the flow dividing pipe 19 through a liquid dividing pipe, and the bottom side of the material storage tank 4 is connected to the annular connecting pipe 7 through a main flow pipe.

[0055] When the dust gas is ejected at high speed through the shunt pipe 19, the dilute urea liquid in the storage tank 4 is transported through the annular connecting pipe 7 and transported to the shunt pipe 19 through the liquid dividing pipe. Under the cooperation of the air flow operation, the dilute urea liquid is mixed with the free ammonia to achieve the degradation and fusion of the dust. In the gas jet state, the fusion degree of the dilute urea liquid and the dust can be improved. At the same time, during the high-speed movement, the dust will not be accumulated in the transport pipeline, and will not cause blockage, thereby reducing the maintenance cost and improving the dust collection effect.

[0056] After the mixed flow is injected, the mixed fusion liquid is injected into the mixing tube 9, the mixed liquid is fused and discharged through the connecting pipe at the bottom of the mixing tube 9, and the remaining unmixed dust gas is filtered through the breathable membrane 21, and the dust is filtered through the breathable membrane 21. After the filtering is completed, the filtered and dust-removed gas is discharged through the exhaust pipe 8. With the cooperation of the scraping motor 23, the rotating disk 25 can be driven to operate, and the scraper 22 can be driven to rotate, so that the dust on the bottom side of the breathable membrane 21 can be cleaned, and the dust falls into the mixed liquid at the bottom of the mixing tube 9, which can realize efficient dust recovery. Secondly, the penetration and filtration effect of the breathable membrane 21 is guaranteed, and the maintenance cost is reduced. Due to the pressure difference between the upper and lower sides of the scraper 22, the gas injected under high pressure has a better filtering effect, and the filtered gas is discharged through the exhaust pipe 8, so that the dust is efficiently recovered.

[0057] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A highly efficient dust recovery device for a granulation tower, characterized in that: include: A base (1), the upper support frame of the base (1) is provided with a hanging plate (2), a pressurizing cylinder (3) is installed on the middle bottom side of the hanging plate (2), a storage tank (4) and a transfer tank (5) are also fixed to the bottom of the hanging plate (2), and the storage tank (4) and the transfer tank (5) are respectively arranged on both sides of the pressurizing cylinder (3); A pressurizing piston (124), the pressurizing cylinder (3) is movably provided with a pressurizing piston (124), a swing hole is opened in the middle of the hanging plate (2), a support frame (12) is installed on the swing hole, two rotating wheels (13) are installed on the support frame (12) via a rotating shaft, and a positioning shaft (122) is connected to the opposite surfaces of the eccentric positions of the two rotating wheels (13); A crank connecting rod (123), wherein the middle position of the top side of the pressurizing piston (124) is rotatably connected to the crank connecting rod (123) via a pin shaft, and a rotating ring (121) is fixed to the top end of the crank connecting rod (123), and the rotating ring (121) is sleeved on the outside of the positioning shaft (122); A flow divider cover (18), wherein the bottom of the pressurizing cylinder (3) is connected to the flow divider cover (18), and a limiting cylinder (20) is fixed to the bottom side of the flow divider cover (18); A stamping piston (15), the top port of the limiting cylinder (20) is located in the flow divider (18), a spring (17) is vertically installed inside the limiting cylinder (20), a piston rod (16) is movably inserted inside the limiting cylinder (20), the piston rod (16) is located at the top of the spring (17), a stamping piston (15) is fixed to the top of the piston rod (16), and the stamping piston (15) is located at the connection between the pressurizing cylinder (3) and the flow divider (18); A mixing cylinder (9) is mounted on the top side of the base (1), a fixing cap (24) is embedded in the middle of the top of the mixing cylinder (9), a breathable membrane (21) is arranged inside the mixing cylinder (9), the breathable membrane (21) is located between the outer wall of the fixing cap (24) and the inner wall of the mixing cylinder (9), a downwardly opening assembly groove is provided in the fixing cap (24), a scraping motor (23) is mounted in the assembly groove, a rotating disk (25) is mounted on the output shaft of the scraping motor (23), a scraper (22) is mounted on the circumferential outer side of the rotating disk (25), and the side edge of the scraper (22) is in close contact with the bottom side of the breathable membrane (21); The bottom of the transfer tank (5) is connected to an air intake pipe (35), the bottom side of the pressurizing cylinder (3) is connected to a connecting cylinder (31), a limiting ring (33) is fixed on the middle inner wall of the connecting cylinder (31), a push rod (34) is movably arranged in the connecting cylinder (31), the top of the push rod (34) is connected to a sealing cap (36), the sealing cap (36) is located at the top port position of the connecting cylinder (31), and the diameter of the sealing cap (36) is larger than the port diameter of the connecting cylinder (31), a limiting cross bar (32) is vertically fixed to the bottom of the push rod (34), the limiting cross bar (32) is located on the bottom side of the limiting ring (33), and the bottom end of the air intake pipe (35) is connected to the bottom end of the connecting cylinder (31).

2. A granulation tower dust efficient recovery device according to claim 1, characterized in that: The bottom diameter of the pressurizing cylinder (3) and the diameter of the flow divider (18) are both larger than the diameter of the connection position between the pressurizing cylinder (3) and the flow divider (18).

3. A granulation tower dust efficient recovery device according to claim 1, characterized in that: The exhaust pipe (8) is connected to the mixing cylinder (9) via a flow divider (19), and the bottom end of the flow divider (19) penetrates the top side wall of the mixing cylinder (9) and the air permeable membrane (21).

4. A granulation tower dust efficient recovery device according to claim 1, characterized in that: The top of the mixing cylinder (9) is connected to an exhaust pipe (8), and the interface of the exhaust pipe (8) is located on the top side of the air permeable membrane (21).

5. The device for efficiently recovering dust from a granulating tower according to claim 1 is characterized in that: An annular connecting pipe (7) is provided on the top side of the mixing cylinder (9), the annular connecting pipe (7) is connected to the flow distribution pipe (19) via a liquid distribution pipe, and the bottom side of the material storage tank (4) is connected to the annular connecting pipe (7) via a main flow pipe.

6. A granulation tower dust efficient recovery device according to claim 1, characterized in that: A rotating motor (11) is installed on the top side of the hanging plate (2), an output shaft of the rotating motor (11) passes through the top side of the hanging plate (2), a connecting disk (52) is installed on the output shaft of the rotating motor (11), a rotating wire (51) is connected to the bottom side of the connecting disk (52), and an air intake pipe (10) is connected to the top of the transfer tank (5).

7. A method for efficiently recovering dust from a granulation tower, characterized in that: The device for efficiently recovering dust from a granulating tower according to claim 1 comprises the following steps: S1: Cyclone acceleration: The waste gas generated by the granulation tower enters the transfer tank (5) through the air inlet pipe (10), which can accelerate the cyclone and ensure that the dust gas is in a cyclonic state to avoid dust precipitation; S2: Acceleration and compression: Acceleration of the dust gas is achieved through pressurization, and the cyclone dust gas in the transfer tank (5) is compressed and ejected through the reciprocating motion of the pressurizing piston (124) in the pressurizing cylinder (3); S3: Spraying and dissolving: The pressurized dust gas is sprayed out at high speed, and the fusion agent can be taken out under the action of gas pressure. During the spraying process, the fusion agent and the dust are fused to achieve dust reduction. At the same time, with the cooperation of high-speed jet, they can be fully fused; S4: Filtration and separation: After high-pressure spraying, the fusion liquid will fall to the bottom of the mixing tube (9), the gas will be filtered through the air permeable membrane (21) and then discharged, and the dust remaining in the air permeable membrane (21) will fall into the fusion liquid and be mixed and decomposed; S5: Mixed extraction: After the dust is mixed with the fusion agent, it is extracted and reused.

8. The method for efficiently recovering dust from a granulation tower according to claim 7, characterized in that: In the step S3, the fusion reagent to be sprayed and dissolved is a 10% to 20% dilute urea solution.

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