Waste heat recovery vacuum spray drying sump oil dewatering device

Abstract

The invention provides a waste heat recovery vacuum spray drying sump oil water removal device, and relates to the technical field of sump oil water removal, the waste heat recovery vacuum spray drying sump oil water removal device comprises a bottom plate, a fixing seat is fixedly mounted on the upper surface of the bottom plate, a drying chamber is fixedly mounted in the fixing seat, and a driving motor is fixedly mounted on one side of the fixing seat; the dirty oil fluid channel and the clean fluid channel can be switched through the first three-way valve, so that the dirty oil fluid channel and the clean fluid channel can enter the second series connection pipe, corresponding fluid is input into the material spraying assembly, and conveying of different fluid is achieved; wherein the cleaning fluid is a solvent toluene which is immiscible with dirty oil and has good solubility, and is started after the spraying operation is finished, so that residual viscous substances in the spraying assembly are removed, and dissolved impurities are taken away by utilizing the dispersity of the cleaning fluid, so that the residual viscous substances in the nozzle are effectively removed, the smoothness of the nozzle is ensured, and the spraying quality is improved. And normal operation of next spraying operation is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of waste oil dewatering, and in particular to a waste heat recovery vacuum spray drying waste oil dewatering device. Background Art

[0002] In many industrial fields such as petroleum refining and chemical industry, the generation of waste oil is inevitable. The water contained in the waste oil not only increases its transportation and storage costs, but may also cause a series of problems such as equipment corrosion and unstable reaction in the subsequent processing process. Traditional methods of removing water from waste oil, such as gravity sedimentation and centrifugal separation, have limited effects on the treatment of waste oil with high water content and severe emulsification. Although low-temperature vacuum spray drying technology has certain advantages, it still has many defects in practical applications. For example, during the spraying process, the nozzle is easily blocked by sticky substances in the waste oil, resulting in uneven spraying or even failure to work properly; the materials in the drying chamber are unevenly heated and prone to agglomeration and accumulation, affecting the drying effect and processing efficiency; the heat is not effectively recycled, resulting in energy waste; the waste oil sticks to the inner wall of the drying chamber seriously, which increases the difficulty and cost of equipment cleaning and maintenance. Therefore, it is of great practical significance to develop a waste oil dewatering device that is efficient, energy-saving and can effectively solve the above problems. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a waste heat recovery vacuum spray drying and oil dewatering device, which solves the problem of uneven spraying due to blockage during the misting process.

[0004] To achieve the above object, the technical solution adopted by the present invention is: A waste heat recovery vacuum spray drying oil dewatering device, comprising a bottom plate, a fixing seat is fixedly mounted on the upper surface of the bottom plate, a drying chamber is fixedly mounted inside the fixing seat, a driving motor is fixedly mounted on one side of the fixing seat, a stirring shaft is fixedly mounted on the output end of the driving motor, the stirring shaft is located inside the drying chamber, and a spiral blade is arranged on the shaft body of the stirring shaft; A spray assembly for spraying dirty oil is installed on the upper side of the inner wall of the drying chamber, a first vacuum pump is fixedly installed on the upper end of the drying chamber, a plurality of metal balls are stored on the lower side of the inner wall of the drying chamber, and an electromagnet is installed on the lower end of the drying chamber; The first bracket and the second bracket are respectively installed on the upper and lower sides of the drying chamber, a feed pipe for storing dirty oil is installed inside the first bracket, a discharge pipe is installed inside the second bracket, the discharge pipe is connected to the bottom of the drying chamber, and the feed pipe is connected to the spray assembly; A high-pressure fan is fixedly mounted on one side of the upper surface of the bottom plate, a heater is connected to the air outlet of the high-pressure fan, and a hot air pipe for guiding hot air to heat the dirty oil is installed at the air outlet of the heater.

[0005] Preferably, a heat exchanger is fixedly mounted on the other side of the upper surface of the bottom plate, and one side of the heat exchanger is provided with an oil inlet for entering the dirty oil and an exhaust port for exhausting the gas inside the drying chamber, and the oil inlet is connected to the dirty oil tank; An oil delivery pipe for conveying dirty oil and an exhaust pipe for exhausting gas are respectively arranged on the other side of the heat exchanger. The exhaust pipe is connected to the first vacuum pump and communicates with the exhaust port. The oil inlet is communicated with the oil delivery pipe.

[0006] Preferably, a first three-way valve is fixedly installed on the outside of the drying chamber, and a first series pipe and a second series pipe for connecting the spray assembly are respectively installed on both sides of the upper end of the drying chamber, the first series pipe is connected to the hot air pipe, the second series pipe is connected to the first three-way valve, and a dirty oil fluid channel and a clean fluid channel are respectively provided at both ends of the first three-way valve.

[0007] Preferably, the feed pipe body is sequentially installed with a receiving tank, a first feed valve, a feed storage container, and a second feed valve; the upper end of the feed pipe is connected to the oil pipeline through a first connecting pipe, and the lower end of the feed pipe is connected to the dirty oil fluid channel.

[0008] Preferably, a detergent box is installed on the upper surface of the base plate, and a delivery pump is provided on the upper end of the detergent box and is connected to the cleaning fluid channel through a second connecting pipe.

[0009] Preferably, the discharge pipe body is sequentially installed with a first discharge valve, a discharge storage container, and a second discharge valve, and the upper end of the discharge pipe is connected to the drying chamber; A second vacuum pump is fixedly installed on the upper surface of the bottom plate, a second three-way valve is installed at one end of the second vacuum pump, branch pipes are installed at both ends of the second three-way valve, and the two branch pipes are respectively connected to the discharge storage container and the feed storage container.

[0010] Preferably, the spray assembly includes a plurality of shells, a mounting seat is fixedly mounted on the upper end of the shell, the upper end of the mounting seat is fixedly mounted on the upper side of the inner wall of the drying chamber, a plurality of nozzles are opened on the outer side of the shell, a ventilation joint is arranged on the upper end of the mounting seat, a liquid connection joint is arranged on the outer side of the mounting seat, the ventilation joint is connected to the first series pipe, and the liquid connection joint is connected to the second series pipe.

[0011] Preferably, a convergence groove for receiving liquid is provided inside the mounting seat, a ventilation pipe is installed at the bottom of the mounting seat through an adapter seat, a rotating seat is installed at the bottom of the ventilation pipe, a receiving groove is opened inside the rotating seat, and a plurality of air outlet holes are opened on the outside of the receiving groove.

[0012] Preferably, a partition plate is fixedly installed inside the shell, the ventilation pipe body seal passes through the center of the partition plate, a plurality of driven blades are fixedly installed on the ventilation pipe body, the driven blades are close to the liquid joint, a sealing swivel seat is arranged on the outer side of the rotating seat, and the sealing swivel seat is sealed with the partition plate.

[0013] Preferably, support columns are respectively arranged on both sides of the nozzle, a sliding groove is opened on the inner wall of the support column, a movable rod is movably installed inside the sliding groove, and a spray guide plate is installed on the rod body of the movable rod; Limiting protrusions are respectively arranged on the upper and lower sides of the support column surface, guide slopes are respectively opened on the upper and lower sides of the nozzle, and a force-bearing plate cooperating with the fluid swing is arranged on one side of the spray guide plate, and the force-bearing plate and the spray guide plate are limitedly cooperated with the adjacent limiting protrusions and guide slopes.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The metal balls have good thermal conductivity and can quickly absorb heat and transfer heat to the surrounding dirty oil droplets. The metal balls not only serve as an additional heat transfer medium, but also break up larger droplets by colliding with the dirty oil droplets, thereby increasing the evaporation rate of water and preventing the dirty oil from sticking to the wall. By starting the drive motor to drive the stirring shaft to rotate, the spiral blades can continuously stir the material to keep it fluid, avoid agglomeration due to uneven heating, and reduce the dirty oil from sticking to the wall.

[0015] 2. Through the rotation of the spiral blades, the metal balls can collide with the dirty oil droplets during the stirring process, and the collision force can further break the larger dirty oil droplets into smaller droplets. In addition, the metal balls continuously hit the inner wall of the drying chamber during the movement, so that the dirty oil that may be attached is shaken off, further helping to reduce the phenomenon of dirty oil sticking to the wall.

[0016] 3. By starting the high-pressure fan and cooperating with the heater for heating, the hot air pipe conveys the feed as hot air, which is sent into the spray drying chamber and quickly contacts with the sprayed liquid atomizer for heat exchange, thereby taking away moisture and accelerating the drying process. In this application, the first vacuum pump is used to extract the air in the spray drying chamber to form a vacuum environment. In a vacuum environment, the boiling point of water is significantly reduced, and the waste oil can achieve rapid evaporation of moisture at a lower temperature, avoiding the adverse effects of high temperature on the quality of the waste oil.

[0017] 4. During the waste oil treatment process, the hot air discharged from the drying chamber and other fluids carrying waste heat enter the hot side channel of the heat exchanger, while the waste oil that needs to be preheated enters the cold side channel. Due to the temperature difference between the hot side and the cold side fluids, the heat is transferred from the hot side to the cold side, so that the waste oil is preheated. When the waste oil is input to the oil pipeline through the oil inlet, the hot air inside the drying chamber is introduced into the heat exchanger from the exhaust pipe by the first vacuum pump. At this time, the hot air will heat the currently input waste oil, and the hot air will be discharged from the exhaust port after passing through the waste oil. In this way, in the subsequent spray drying process, the time for the waste oil to reach the temperature required for evaporation of water is shortened, and the energy consumption of the heating system is correspondingly reduced, realizing efficient energy recovery and utilization.

[0018] 5. The dirty oil fluid channel and the clean fluid channel can be switched through the first three-way valve, so that the dirty oil fluid channel and the clean fluid channel can enter the second series pipe respectively, and input the corresponding fluid into the spray assembly to realize the delivery of different fluids, wherein the clean fluid is a solvent toluene that is immiscible with the dirty oil and has good solubility. It is opened after the spray operation is completed to remove the viscous substances remaining inside the spray assembly. Toluene is a solvent that is immiscible with the dirty oil and has good solubility or dispersibility. When the dirty oil contains viscous components such as asphaltene and colloid, toluene can dissolve these viscous substances through its good solubility, and at the same time use its dispersibility to take away the dissolved impurities, thereby effectively removing the viscous substances remaining inside the nozzle, ensuring that the nozzle is unobstructed and ensuring the normal progress of the next spray operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the present application; Figure 2 It is a schematic diagram of the three-dimensional structure from another perspective of the present application; Figure 3 It is a side view structural schematic diagram of the present application; Figure 4 It is a front view structural diagram of the present application; Figure 5 It is a top view structural schematic diagram of the present application; Figure 6 yes Figure 5 Schematic diagram of the cross-section structure at AA; Figure 7 It is a three-dimensional structural schematic diagram of the spraying component; Figure 8 It is a schematic diagram of the top view of the spraying assembly; Fig. 9 yes Figure 8 Schematic diagram of the cross-section structure at BB; Fig.10 yes Figure 8 Schematic diagram of the cross-sectional structure at CC in the middle.

[0020] In the figure: 1, bottom plate; 2, fixing seat; 3, drying chamber; 4, first bracket; 5, feed pipe; 501, first series pipe; 502, second series pipe; 503, first three-way valve; 504, second connecting pipe; 505, first connecting pipe; 5051, receiving tank; 5052, first feed valve; 5053, feed storage container; 5054, second feed valve; 506, dirty oil fluid channel; 507, clean fluid channel; 6, high-pressure fan; 601, heater; 602, hot air pipe; 7, heat exchanger; 701, exhaust port; 702, oil inlet; 703, oil pipeline; 704, exhaust pipe; 8, drive motor; 9, spray assembly; 901, shell; 902, mounting seat; 9021, ventilation joint; 9022, liquid joint; 9023, convergence tank; 903, Nozzle; 9031, support column; 9032, guide slope; 9033, movable rod; 9034, sliding groove; 9035, limit convex block; 9036, spray guide plate; 9037, force plate; 904, partition plate; 905, ventilation pipe; 9051, adapter seat; 9052, driven blade; 9053, rotating seat; 9054, receiving groove; 9055, air outlet; 9056, seal Sealing seat; 10. first vacuum pump; 11. detergent tank; 12. delivery pump; 13. second bracket; 1301. discharge pipe; 1302. first discharge valve; 1303. discharge storage container; 1304. second discharge valve; 14. electromagnet; 15. metal ball; 16. stirring shaft; 17. spiral blade; 18. second vacuum pump; 1801. branch pipe; 1802. second three-way valve. DETAILED DESCRIPTION

[0021] The following will be combined with 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 making creative work are within the scope of protection of the present invention.

[0022] like Figures 1 to 10 As shown, a waste heat recovery vacuum spray drying oil dewatering device comprises a bottom plate 1, a fixing seat 2 is fixedly mounted on the upper surface of the bottom plate 1, a drying chamber 3 is fixedly mounted inside the fixing seat 2, a driving motor 8 is fixedly mounted on one side of the fixing seat 2, a stirring shaft 16 is fixedly mounted on the output end of the driving motor 8, the stirring shaft 16 is located inside the drying chamber 3, and a spiral blade 17 is arranged on the shaft body of the stirring shaft 16; A spray assembly 9 for spraying out dirty oil is installed on the upper side of the inner wall of the drying chamber 3, a first vacuum pump 10 is fixedly installed on the upper end of the drying chamber 3, a plurality of metal balls 15 are stored on the lower side of the inner wall of the drying chamber 3, and an electromagnet 14 is installed at the lower end of the drying chamber 3; wherein the electromagnet 14 can use the magnetic properties of the metal balls 15 to prevent the metal balls 15 from being discharged along with the dried material during discharge.

[0023] The first bracket 4 and the second bracket 13 are respectively installed on the upper and lower sides of the drying chamber 3. A feed pipe 5 for storing waste oil is installed inside the first bracket 4. A discharge pipe 1301 is installed inside the second bracket 13. The discharge pipe 1301 is connected to the bottom of the drying chamber 3. The feed pipe 5 is connected to the spray assembly 9. A high-pressure fan 6 is fixedly installed on one side of the upper surface of the bottom plate 1, and a heater 601 is connected to the air outlet of the high-pressure fan 6. A hot air pipe 602 for guiding hot air to heat the dirty oil is installed at the air outlet of the heater 601.

[0024] In the present application, the inner wall of the drying chamber 3 is coated with an anti-stick coating - a polytetrafluoroethylene coating to reduce the adhesion of dirty oil, wherein the metal ball 15 has good thermal conductivity and can quickly absorb heat and transfer heat to the surrounding dirty oil droplets. The metal ball 15 not only serves as an additional heat transfer medium, but also breaks up larger droplets by colliding with the dirty oil droplets, thereby increasing the evaporation rate of water and preventing the dirty oil from sticking to the wall. By starting the drive motor 8 to drive the stirring shaft 16 to rotate, the spiral blade 17 can continuously stir the material to keep it fluid, avoid agglomeration due to uneven heating and reduce the dirty oil from sticking to the wall.

[0025] The metal balls 15 can collide with the oil droplets during the stirring process through the rotation of the spiral blades 17, and the larger oil droplets can be further broken into smaller droplets by the collision force. In addition, the metal balls 15 continuously hit the inner wall of the drying chamber 3 during the movement, so that the oil that may be attached is shaken off, further helping to reduce the oil sticking to the wall.

[0026] By starting the high-pressure blower 6 and cooperating with the heater 601 for heating, the hot air pipe 602 delivers the feed as hot air, which is sent into the spray drying chamber 3 and quickly contacts the sprayed liquid atomized material for heat exchange, thereby taking away the moisture and accelerating the drying process. In this application, the first vacuum pump 10 is used to extract the air in the spray drying chamber 3 to form a vacuum environment. In a vacuum environment, the boiling point of water is significantly reduced. For example, when the indoor air pressure is 30kPa, the boiling point of water in the dirty oil may be reduced from 100°C to about 40°C, so that the dirty oil can achieve rapid evaporation of water at a lower temperature, avoiding the adverse effects of high temperature on the quality of the dirty oil.

[0027] In this embodiment, a heat exchanger 7 is fixedly mounted on the other side of the upper surface of the bottom plate 1. An oil inlet 702 for entering the dirty oil and an exhaust port 701 for exhausting the internal gas of the drying chamber 3 are respectively provided on one side of the heat exchanger 7. The oil inlet 702 is connected to the dirty oil tank. The other side of the heat exchanger 7 is provided with an oil delivery pipe 703 for conveying dirty oil and an exhaust pipe 704 for exhausting gas. The exhaust pipe 704 is connected to the first vacuum pump 10 and communicates with the exhaust port 701 . The oil inlet 702 and the oil delivery pipe 703 are communicated with each other.

[0028] During the waste oil treatment process, the hot air discharged from the drying chamber 3 and other fluids carrying waste heat enter the hot side channel of the heat exchanger 7, while the waste oil that needs to be preheated enters the cold side channel. Due to the temperature difference between the hot side and the cold side fluids, the heat is transferred from the hot side to the cold side, so that the waste oil is preheated. When the waste oil is input to the oil pipeline 703 through the oil inlet 702, the hot air inside the drying chamber 3 is introduced into the heat exchanger 7 from the exhaust pipe 704 by the first vacuum pump 10. At this time, the hot air will heat the currently input waste oil, and the hot air will be discharged from the exhaust port 701 after passing through the waste oil. In this way, in the subsequent spray drying process, the time for the waste oil to reach the temperature required for evaporating water is shortened, and the energy consumption of the heating system is correspondingly reduced, realizing efficient recovery and utilization of energy.

[0029] In this embodiment, a first three-way valve 503 is fixedly installed on the outside of the drying chamber 3, and a first series pipe 501 and a second series pipe 502 for connecting the spray assembly 9 are respectively installed on both sides of the upper end of the drying chamber 3. The first series pipe 501 is connected to the hot air pipe 602, and the second series pipe 502 is connected to the first three-way valve 503. The two ends of the first three-way valve 503 are respectively provided with a dirty oil fluid channel 506 and a clean fluid channel 507; The feed pipe 5 is provided with a receiving tank 5051, a first feed valve 5052, a feed storage container 5053, and a second feed valve 5054 in sequence. The upper end of the feed pipe 5 is connected to the oil delivery pipe 703 through the first connecting pipe 505, and the lower end of the feed pipe 5 is connected to the dirty oil fluid channel 506. A detergent box 11 is installed on the upper surface of the bottom plate 1 , and a delivery pump 12 is provided at the upper end of the detergent box 11 and is connected to the cleaning fluid channel 507 through a second connecting pipe 504 .

[0030] The dirty oil fluid channel 506 and the clean fluid channel 507 can be switched through the first three-way valve 503, so that the dirty oil fluid channel 506 and the clean fluid channel 507 can enter the second series pipe 502 respectively, and input the corresponding fluid into the spray assembly 9 to realize the delivery of different fluids, wherein the clean fluid is a solvent toluene that is immiscible with the dirty oil and has good solubility, which is opened after the spray operation is completed to remove the viscous substances remaining inside the spray assembly 9. Toluene is a solvent that is immiscible with the dirty oil and has good solubility or dispersibility. When the dirty oil contains viscous components such as asphaltene and colloid, toluene can dissolve these viscous substances through its good solubility, and at the same time use its dispersibility to take away the dissolved impurities, thereby effectively removing the viscous substances remaining inside the nozzle, ensuring that the nozzle is unobstructed and ensuring the normal progress of the next spray operation.

[0031] In the specific configuration, the body of the discharge pipe 1301 is sequentially installed with a first discharge valve 1302, a discharge storage container 1303, and a second discharge valve 1304, and the upper end of the discharge pipe 1301 is connected to the drying chamber 3; A second vacuum pump 18 is fixedly installed on the upper surface of the bottom plate 1, a second three-way valve 1802 is installed at one end of the second vacuum pump 18, branch pipes 1801 are installed at both ends of the second three-way valve 1802, and the two branch pipes 1801 are respectively connected to the discharge storage container 1303 and the feed storage container 5053.

[0032] When feeding, first close the second feeding valve 5054 on the side close to the vacuum environment, then open the first feeding valve 5052 to perform the feeding operation, after completion, close the first feeding valve 5052 first, then evacuate the feeding storage container 5053, and finally open the second feeding valve 5054 to restore the connection; when discharging, first close the first discharging valve 1302 on the side close to the vacuum environment, then open the second discharging valve 1304 to perform the discharging operation, after completion, close the second discharging valve 1304 first, then evacuate the discharging storage container 1303, and finally open the first discharging valve 1302 to restore the connection, so as to maintain the internal pressure of the device. Vacuum degree. In order to evacuate the discharge storage container 1303 and the feed storage container 5053, one of the branch pipes 1801 is connected to the second vacuum pump 18 through the second vacuum pump 18 using the second three-way valve 1802, and then the second vacuum pump 18 is started to perform vacuum operation, wherein the second three-way valve 1802 can be used to select the discharge storage container 1303 or the feed storage container 5053 to be evacuated, and then the branch pipe 1801 is connected to the discharge storage container 1303 and the feed storage container 5053, so that a single storage container can be evacuated to maintain the vacuum degree in the device.

[0033] Finally, the dried material can be discharged and collected through containers. The double-gate valve structure effectively maintains the vacuum degree in the device during the feeding and discharging process, preventing a large amount of air from rushing in, ensuring the stable operation of the vacuum system, and further ensuring the efficiency and stability of the waste oil dewatering process.

[0034] In the present application, the spray assembly 9 includes a plurality of shells 901, a mounting seat 902 is fixedly installed on the upper end of the shell 901, the upper end of the mounting seat 902 is fixedly installed on the upper side of the inner wall of the drying chamber 3, a plurality of nozzles 903 are opened on the outer side of the shell 901, a ventilation joint 9021 is arranged on the upper end of the mounting seat 902, a liquid connection joint 9022 is arranged on the outer side of the mounting seat 902, the ventilation joint 9021 is connected to the first series pipe 501, and the liquid connection joint 9022 is connected to the second series pipe 502.

[0035] By connecting the first series pipe 501 to the hot air pipe 602, the heated air can enter into each ventilation joint 9021, and by connecting the second series pipe 502 to the first three-way valve 503, the corresponding fluids in the dirty oil fluid channel 506 and the clean fluid channel 507 can enter into each liquid joint 9022.

[0036] It should be noted that a convergence groove 9023 for receiving liquid is provided inside the mounting seat 902, a ventilation pipe 905 is installed at the bottom of the mounting seat 902 through an adapter seat 9051, a rotating seat 9053 is installed at the bottom of the ventilation pipe 905, a receiving groove 9054 is provided inside the rotating seat 9053, and a plurality of air outlet holes 9055 are provided outside the receiving groove 9054. The hot air is guided into the receiving groove 9054 through the ventilation pipe 905, and as the pressure increases, the hot air is discharged from the plurality of air outlet holes 9055 and sprayed toward the nozzle 903 outside in coordination with the fluid. In this process, the contact between the hot air and the dirty oil can be used to remove water from the dirty oil in advance, further improving the removal efficiency.

[0037] In the specific setting, a partition plate 904 is fixedly installed inside the shell 901, and the ventilation pipe 905 tube body is sealed to pass through the center of the partition plate 904. A plurality of driven blades 9052 are fixedly installed on the ventilation pipe 905 tube body, and the driven blades 9052 are close to the liquid connection joint 9022. A sealing rotating seat 9056 is arranged on the outer side of the rotating seat 9053, and the sealing rotating seat 9056 is sealed with the partition plate 904.

[0038] When the dirty oil enters the converging groove 9023, the fluid pressure can push the driven blade 9052 to realize the rotation of the ventilation pipe 905 body, wherein the rotation of the ventilation pipe 905 body can make the positions of the several air outlets 9055 below continuously change, thereby realizing the heating treatment of the dirty oil in each nozzle 903. In order to guide the dirty oil to be sprayed out accurately, the hot air and the dirty oil are separated in advance through the partition plate 904, and intersect at the nozzle 903 to realize the spray operation.

[0039] In the present application, support columns 9031 are respectively provided on both sides of the nozzle 903, and a sliding groove 9034 is provided on the inner wall of the support column 9031. A movable rod 9033 is movably installed inside the sliding groove 9034, and a spray guide plate 9036 is installed on the rod body of the movable rod 9033; Limiting protrusions 9035 are respectively provided on the upper and lower sides of the surface of the support column 9031, and guide slopes 9032 are respectively provided on the upper and lower sides of the nozzle 903. A force-bearing plate 9037 cooperating with the fluid swing is provided on one side of the spray guide plate 9036. The force-bearing plate 9037 and the spray guide plate 9036 are limited and cooperated with the adjacent limiting protrusions 9035 and the guide slopes 9032. During the spraying process, through continuous spraying, it will cooperate with the force plate 9037 under its pressure, so that the movable rod 9033 can move up and down under the push of the force plate 9037. In order to automatically adjust the force direction of the force plate 9037 and realize the up and down movement of the movable rod 9033, when it reaches one end of the sliding groove 9034, the movable rod 9033 is flipped under the cooperation of the limiting protrusion 9035 and the guide slope 9032, and the inclination direction of the force plate 9037 is consistent with the limiting direction of the limiting protrusion 9035 and the guide slope 9032, so as to realize automatic reversing operation. After reversing, the upper and lower positions of the movable rod 9033 are changed by changing the force plate 9037. Through the above structure, the fluid and hot air can be sprayed at any position of the nozzle 903 when being discharged, so that the material can be distributed more widely to facilitate subsequent reactions.

[0040] The working principle of this waste heat recovery vacuum spray drying oil dewatering device: 1. Preparation before starting the device First, check whether the connections of the various components of the device are firm and whether the opening and closing states of the valves are correct. Slowly transport the waste oil from the heat exchanger 7 to the first three-way valve 503. In this process, the connection between the first vacuum pump 10 and the heat exchanger 7 is used to preheat the waste oil by using the recovered waste heat when passing through the heat exchanger 7.

[0041] The first vacuum pump 10 is started to evacuate the spray drying chamber 3 to reduce the air pressure in the chamber to a set initial vacuum degree.

[0042] The heater 601 is started to heat the air so that the hot air can enter the spray drying chamber 3 according to the predetermined parameters.

[0043] 2. Spray drying process When the preheated waste oil temperature and the temperature and air pressure in the spray drying chamber 3 reach the set requirements, the first three-way valve 503 is used to open the waste oil fluid channel 506, and the waste oil is atomized into tiny droplets and sprayed into the spray drying chamber 3.

[0044] At the same time, the driving motor 8 is started, driving the stirring shaft 16 and the spiral blade 17 to rotate, and the metal ball 15 moves accordingly in the drying chamber 3. The stirring shaft 16 and the spiral blade 17 continuously stir the material to prevent agglomeration and reduce the adhesion of dirty oil to the wall; the metal ball 15 quickly absorbs heat and transfers it to the dirty oil droplets, promoting water evaporation, and at the same time breaks up larger droplets by colliding with the droplets, and hits the inner wall to prevent the dirty oil from adhering to the wall.

[0045] The hot air and the sprayed dirty oil droplets are quickly contacted in the spray drying chamber 3 to exchange heat, and the water in the dirty oil is quickly evaporated under the vacuum environment. The evaporated water vapor is pumped out by the first vacuum pump 10 and is subsequently processed.

[0046] After the spraying operation is completed, the first three-way valve 503 is used to open the clean fluid channel 507, and the toluene solvent enters the nozzle 903 to remove the residual viscous material. After the cleaning is completed, the clean fluid channel 507 is closed and the dirty oil fluid channel 506 is opened again to continue the spraying operation.

[0047] 3. Waste heat recovery and utilization operation The hot air and other high-temperature fluids discharged from the spray drying chamber 3 enter the hot side channel of the heat exchanger 7 and perform heat exchange with the waste oil in the cold side channel. The recovered waste heat continuously provides heat for the waste oil, increases the temperature of the waste oil, and reduces the energy consumption of the heating system.

[0048] Regularly check the operating conditions of the heat exchanger 7, such as whether the heat exchange efficiency has decreased, whether the heat exchange tube wall has scaled, etc. If the heat exchange efficiency is found to be reduced, maintenance can be carried out by cleaning the heat exchange tube wall, adjusting the fluid flow rate, etc., to ensure the efficient operation of the waste heat recovery system.

[0049] 4. Feeding and discharging operation and metal ball 15 control When feeding is required, first close the second feed valve 5054 on the side close to the vacuum environment, then open the first feed valve 5052 to perform the feeding operation, after completion, close the first feed valve 5052 first and then evacuate the feed storage container 5053, and finally open the second feed valve 5054 to restore the connection; when discharging, first close the first discharge valve 1302 on the side close to the vacuum environment, then open the second discharge valve 1304 to perform the discharging operation, after completion, close the second discharge valve 1304 first and then evacuate the discharge storage container 1303, and finally open the first discharge valve 1302 to restore the connection, so as to maintain the vacuum degree in the device, and finally the dried material is discharged and can be collected through the container.

[0050] Since the electromagnet 14 installed at the discharge port can utilize the magnetic properties of the metal ball 15 to prevent the metal ball 15 from being discharged with the dried material during discharge. After the discharge is completed, the second discharge valve 1304 is closed, the discharge storage container 1303 is evacuated, and then the first discharge valve 1302 is opened to restore the internal communication of the device.

[0051] 5. Equipment shutdown and maintenance When the waste oil treatment task is completed, first stop the waste oil spraying of the spraying assembly 9, and then turn off the heater 601, the first vacuum pump 10, the drive motor 8 and the related circulation pump of the heat exchanger 7 and other equipment in turn.

[0052] The device is thoroughly cleaned and maintained, including cleaning the spray assembly 9, cleaning the storage container, checking the wear of the spiral blades 17 and the metal balls 15, checking the integrity of the polytetrafluoroethylene coating, etc., to prepare for the next waste oil treatment operation.

[0053] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the protection scope of the present invention.

Claims

1. A waste heat recovery vacuum spray drying oil dewatering device, comprising a bottom plate (1), characterized in that: A fixing seat (2) is fixedly mounted on the upper surface of the bottom plate (1), a drying chamber (3) is fixedly mounted inside the fixing seat (2), a driving motor (8) is fixedly mounted on one side of the fixing seat (2), a stirring shaft (16) is fixedly mounted on the output end of the driving motor (8), the stirring shaft (16) is located inside the drying chamber (3), and a spiral blade (17) is provided on the shaft body of the stirring shaft (16); A spray assembly (9) for spraying dirty oil is installed on the upper side of the inner wall of the drying chamber (3), a first vacuum pump (10) is fixedly installed on the upper end of the drying chamber (3), a plurality of metal balls (15) are stored on the lower side of the inner wall of the drying chamber (3), and an electromagnet (14) is installed on the lower end of the drying chamber (3); The drying chamber (3) is provided with a first bracket (4) and a second bracket (13) on the upper and lower sides respectively; a feed pipe (5) for storing waste oil is installed inside the first bracket (4); a discharge pipe (1301) is installed inside the second bracket (13); the discharge pipe (1301) is connected to the bottom of the drying chamber (3); and the feed pipe (5) is connected to the spray assembly (9); A high-pressure fan (6) is fixedly mounted on one side of the upper surface of the bottom plate (1); a heater (601) is connected to the air outlet of the high-pressure fan (6); and a hot air pipe (602) for guiding hot air to heat the waste oil is installed at the air outlet of the heater (601).

2. The waste heat recovery vacuum spray drying oil dewatering device according to claim 1 is characterized by: A heat exchanger (7) is fixedly mounted on the other side of the upper surface of the bottom plate (1), and one side of the heat exchanger (7) is provided with an oil inlet (702) for the intake of dirty oil and an exhaust port (701) for exhausting the gas inside the drying chamber (3), and the oil inlet (702) is connected to the dirty oil tank; An oil delivery pipe (703) for conveying dirty oil and an exhaust pipe (704) for exhausting gas are respectively provided on the other side of the heat exchanger (7); the exhaust pipe (704) is connected to the first vacuum pump (10) and communicates with the exhaust port (701); and the oil inlet (702) and the oil delivery pipe (703) are communicated with each other.

3. The waste heat recovery vacuum spray drying oil dewatering device according to claim 2 is characterized by: A first three-way valve (503) is fixedly installed on the outside of the drying chamber (3), and a first series pipe (501) and a second series pipe (502) for connecting the spray assembly (9) are respectively installed on both sides of the upper end of the drying chamber (3), the first series pipe (501) is connected to the hot air pipe (602), and the second series pipe (502) is connected to the first three-way valve (503), and the first three-way valve (503) is respectively provided with a dirty oil fluid channel (506) and a clean fluid channel (507) at both ends.

4. The waste heat recovery vacuum spray drying oil dewatering device according to claim 3 is characterized by: The feed pipe (5) is provided with a receiving tank (5051), a first feed valve (5052), a feed storage container (5053), and a second feed valve (5054) in sequence. The upper end of the feed pipe (5) is connected to the oil delivery pipe (703) via a first connecting pipe (505), and the lower end of the feed pipe (5) is connected to the dirty oil fluid channel (506).

5. The waste heat recovery vacuum spray drying oil dewatering device according to claim 3 is characterized by: A detergent box (11) is installed on the upper surface of the base plate (1), and a delivery pump (12) is provided at the upper end of the detergent box (11) and is connected to the cleaning fluid channel (507) via a second connecting pipe (504).

6. The waste heat recovery vacuum spray drying oil dewatering device according to claim 4 is characterized by: The body of the discharge pipe (1301) is sequentially mounted with a first discharge valve (1302), a discharge storage container (1303), and a second discharge valve (1304); the upper end of the discharge pipe (1301) is connected to the drying chamber (3); A second vacuum pump (18) is fixedly mounted on the upper surface of the bottom plate (1); a second three-way valve (1802) is mounted at one end of the second vacuum pump (18); branch pipes (1801) are mounted at both ends of the second three-way valve (1802); the two branch pipes (1801) are respectively connected to the discharge storage container (1303) and the feed storage container (5053).

7. The waste heat recovery vacuum spray drying oil dewatering device according to claim 3 is characterized by: The spray assembly (9) comprises a plurality of shells (901), a mounting seat (902) being fixedly mounted on the upper end of the shells (901), the upper end of the mounting seat (902) being fixedly mounted on the upper side of the inner wall of the drying chamber (3), a plurality of nozzles (903) being opened on the outer side of the shells (901), a ventilation joint (9021) being arranged on the upper end of the mounting seat (902), a liquid connection joint (9022) being arranged on the outer side of the mounting seat (902), the ventilation joint (9021) being connected to the first series pipe (501), and the liquid connection joint (9022) being connected to the second series pipe (502).

8. The waste heat recovery vacuum spray drying oil dewatering device according to claim 7 is characterized by: A convergence groove (9023) for receiving liquid is arranged inside the mounting seat (902), a ventilation pipe (905) is installed at the bottom of the mounting seat (902) via an adapter seat (9051), a rotating seat (9053) is installed at the bottom of the ventilation pipe (905), a receiving groove (9054) is arranged inside the rotating seat (9053), and a plurality of air outlet holes (9055) are arranged on the outside of the receiving groove (9054).

9. The waste heat recovery vacuum spray drying oil dewatering device according to claim 8 is characterized by: A partition plate (904) is fixedly installed inside the shell (901); the ventilation pipe (905) tube body seals and passes through the center of the partition plate (904); a plurality of driven blades (9052) are fixedly installed on the ventilation pipe (905) tube body; the driven blades (9052) are close to the liquid-passing joint (9022); a sealing rotating seat (9056) is arranged on the outside of the rotating seat (9053); and the sealing rotating seat (9056) is in sealing cooperation with the partition plate (904).

10. The waste heat recovery vacuum spray drying oil dewatering device according to claim 7, characterized in that: Support columns (9031) are respectively arranged on both sides of the nozzle (903), a sliding groove (9034) is provided on the inner wall of the support column (9031), a movable rod (9033) is movably installed inside the sliding groove (9034), and a spray guide plate (9036) is installed on the rod body of the movable rod (9033); Limiting protrusions (9035) are respectively arranged on the upper and lower sides of the surface of the support column (9031), and guide slopes (9032) are respectively opened on the upper and lower sides of the nozzle (903). A force-bearing plate (9037) that cooperates with the swing of the fluid is arranged on one side of the injection guide plate (9036), and the force-bearing plate (9037) and the injection guide plate (9036) are limitedly matched with adjacent limiting protrusions (9035) and guide slopes (9032).

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