Novel sweating type melt crystallization oil wax separation device and separation process thereof

Abstract

The invention discloses a novel sweating type melt crystallization oil-wax separation device and a separation process thereof, and particularly relates to the technical field of oil-wax separation. A novel sweating type melt crystallization oil and wax separation device comprises a separation tank, a water inlet pipeline, a water outlet pipeline, a feeding pipeline, an oil outlet pipeline and a wax outlet pipeline are installed on the lower portion of the separation tank, the water inlet pipeline is used for conveying clean water into the separation tank, the height of hot water in the separation tank reaches 20 cm, and the wax outlet pipeline is used for conveying wax to the separation tank. The water outlet pipeline is used for extracting water and impurities in the separation tank, the feeding pipeline is used for conveying liquid Fischer-Tropsch wax into the separation tank, the oil outlet pipeline is used for extracting white oil separated from the separation tank, the wax outlet pipeline is used for extracting liquid wax in the separation tank, and a temperature control pipe is arranged in the separation tank. According to the novel sweating type melt crystallization oil-wax separation device and the separation process thereof, the oil-wax separation efficiency and purity can be improved, and meanwhile, the energy consumption and the operation complexity are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of oil-wax separation, and in particular to a novel sweating type melt-crystallized oil-wax separation device and a separation process thereof. Background Art

[0002] In the field of petrochemicals and coal chemical industry, the Fischer-Tropsch synthesis process is an important production technology. This process converts synthesis gas (mainly carbon monoxide and hydrogen) into liquid hydrocarbon fuels and chemicals under certain temperature and pressure conditions under the action of a catalyst. Fischer-Tropsch wax is a by-product produced during the Fischer-Tropsch synthesis process. It is mainly composed of waxy compounds with high melting points. If these compounds are not effectively separated, they will affect the quality and performance of the final product.

[0003] Traditional oil-wax separation methods mainly include physical and chemical methods such as solvent extraction, adsorption separation, and filtration, but these methods often have problems such as high energy consumption, complex operation, and low separation efficiency. Therefore, a new oil-wax separation technology is developed to improve separation efficiency, reduce energy consumption, and simplify the operation process.

[0004] The present invention provides a sweating type melt crystallization oil-wax separation device and process, aiming to solve the deficiencies of the existing oil-wax separation technology, improve the efficiency and purity of oil-wax separation, and reduce energy consumption and operation complexity. Summary of the invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a novel sweating type molten crystallization oil wax separation device and its separation process, which can improve the efficiency and purity of oil wax separation while reducing energy consumption and operation complexity.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0007] A novel sweating type molten crystallized oil wax separation device comprises: a separation tank, wherein a water inlet pipeline, a water outlet pipeline, a feed pipeline, an oil outlet pipeline and a wax outlet pipeline are installed at the lower part of the separation tank, the water inlet pipeline is used to transport clean water into the separation tank, the height of cold water in the separation tank reaches 20 cm, the water outlet pipeline is used to extract water and impurities in the separation tank, the feed pipeline is used to transport liquid Fischer-Tropsch wax into the separation tank, the oil outlet pipeline is used to extract white oil separated from the separation tank, the wax outlet pipeline is used to extract liquid wax from the separation tank, and a temperature control pipe is arranged in the separation tank, the temperature control pipe is connected with cold water and hot water, and the hot water is heated by solar energy or air energy, so that energy can be saved.

[0008] Preferably, an iron plate is fixed below the temperature control tube, a plurality of small holes are formed on the iron plate, and the iron plate is used to support the wax on the upper part.

[0009] Preferably, a gas pipeline is provided on the top of the separation tank, and the gas pipeline is connected to a gas source.

[0010] Preferably, a cutting assembly is provided above the temperature control tube, and the cutting assembly is used to cut solid wax. The cutting assembly includes a rotating tube, a blade is installed at the lower part of the rotating tube, and the top of the rotating tube extends to the top of the separation tank. A motor is provided above the separation tank, and the output shaft of the motor is connected to the rotating tube.

[0011] Preferably, a water box is fixedly installed on the top of the separation tank, the motor is fixed to the top of the water box, the rotating tube passes through the water box and is rotationally sealed with the water box, a connecting hole is opened on the part of the rotating tube located inside the water box, a pipe is installed on the water box, and the pipe is a hot water source.

[0012] Preferably, the pipeline can also be connected to a high-pressure air source, and a sealing mechanism is provided at the bottom end of the rotating tube, and the sealing mechanism includes a support rod fixed inside the rotating tube, and a movable tube is provided below the support rod, and the movable tube is slidingly and sealingly connected to the rotating tube, the top of the movable tube is in an open state, and the bottom is in a closed state, a spring is fixedly installed inside the movable tube, and the top end of the spring is fixed to the support rod, and a plurality of water outlet holes are opened on the movable tube.

[0013] Preferably, two limit blocks are fixed inside the rotating tube, and the limit blocks penetrate the corresponding water outlet holes. The limit blocks are arranged to prevent the movable tube from completely moving out of the rotating tube.

[0014] Preferably, a limiting assembly is also provided on the separation tank, and the limiting assembly is used to limit the rotation of the solidified wax. The limiting assembly includes a plurality of limiting tubes located inside the separation tank, and the top end of the limiting tube extends to above the separation tank. A first annular tube and a second annular tube are provided above the limiting tube, and a water inlet pipe and a water outlet pipe are respectively installed on the first annular tube and the second annular tube, and a U-shaped tube is provided inside the limiting tube, and both ends of the U-shaped tube are respectively connected to the first annular tube and the second annular tube.

[0015] A novel sweating type melt crystallization oil wax separation process, comprising:

[0016] Add 20cm of water to the separation tank and transport it through the water inlet pipe;

[0017] delivering liquid Fischer-Tropsch wax to a separation tank via a feed line;

[0018] After the liquid Fischer-Tropsch wax is transported, cold water at 25-30°C is transported through the temperature control pipe to cool down the inside of the separation tank and form crystals, and the wax begins to solidify;

[0019] After waiting for 30-40 hours, the white oil and wax are initially separated, and the impurities in the Fischer-Tropsch wax will settle into the water. At this time, there are three layers of material in the separation tank, the bottom layer is water and impurities, the middle layer is white oil, and the top layer is solidified wax.

[0020] Discharge water and impurities through the outlet pipe;

[0021] After the water and impurities are discharged, water at 20-25℃ is transported to the temperature control tube for 30-40 hours to make the crystals in the separation tank sweat, and the white oil and wax are further separated. At the same time, the pressure inside the separation tank is increased to 0.1-0.2Mpa to obtain purer wax.

[0022] Pump the white oil into the oil tank through the oil outlet pipeline;

[0023] When only solidified wax is left in the separation tank, hot water at 70°C is transported to the temperature control tube to heat the solidified wax and turn it into liquid;

[0024] The liquid wax is transported to the turnover tank through the wax outlet pipeline for storage.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] (1) The present invention can effectively separate white oil and wax through precise temperature control and sweating process, thereby improving separation efficiency. Compared with the traditional oil-wax separation method, the device can obtain a wax product with higher purity in a shorter time.

[0027] (2) The present invention utilizes hot water heated by solar energy or air energy as a heat source, thereby reducing dependence on traditional energy sources and thus reducing energy consumption.

[0028] (3) The sweating melt crystallization process can effectively remove impurities in the Fischer-Tropsch wax and obtain a wax product with higher purity.

[0029] (4) The present invention can be adjusted and optimized according to different raw material characteristics and production requirements, and has strong adaptability; whether it is processing materials with high wax content or materials with low wax content, it can achieve efficient and stable crushing of solidified wax. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram of the structure of a novel sweating type melt crystallization oil wax separation device provided by the present invention;

[0031] Figure 2 A schematic cross-sectional view of a novel sweating type melt crystallization oil wax separation device provided by the present invention;

[0032] Figure 3This is a schematic diagram of the assembly of the rotating tube and the water box in the novel sweating type melt crystallization oil wax separation device provided by the present invention;

[0033] Figure 4 A schematic diagram of the structure inside the rotating tube of the novel sweating type melt crystallization oil wax separation device provided by the present invention;

[0034] Figure 5 A schematic diagram of the structure of the blocking mechanism in the novel sweating type melt crystallization oil wax separation device provided by the present invention;

[0035] Figure 6 This is an exploded schematic diagram of a blocking mechanism in a novel sweating type melt crystallization oil wax separation device provided by the present invention;

[0036] Figure 7 A schematic diagram of the structure of a limiter assembly in a novel sweating type melt crystallization oil wax separation device provided by the present invention;

[0037] Figure 8 This is a schematic diagram of the cross-sectional structure of a limit tube in a novel sweating type molten crystallization oil wax separation device provided by the present invention.

[0038] Among them, the names corresponding to the figure marks are: 1. separation tank; 2. water inlet pipeline; 3. water outlet pipeline; 4. feed pipeline; 5. oil outlet pipeline; 6. wax outlet pipeline; 7. temperature control tube; 8. iron plate; 9. rotating tube; 10. blade; 11. motor; 12. connecting hole; 13. water box; 14. pipeline; 15. blocking mechanism; 151. support rod; 152. moving tube; 153. spring; 154. water outlet hole; 16. limit block; 17. limit tube; 18. first annular tube; 19. second annular tube; 20. water inlet pipe; 21. water outlet pipe; 22. U-shaped tube. DETAILED DESCRIPTION

[0039] The present invention is further described below in conjunction with the accompanying drawings and embodiments. The embodiments of the present invention include but are not limited to the following embodiments.

[0040] like Figure 1-8As shown, the novel sweating type molten crystallization oil wax separation device provided by the present invention comprises: a separation tank 1, wherein a water inlet pipeline 2, a water outlet pipeline 3, a feed pipeline 4, an oil outlet pipeline 5 and a wax outlet pipeline 6 are installed at the lower part of the separation tank 1, wherein the water inlet pipeline 2 is used to transport clean water into the separation tank 1, and the height of the hot water in the separation tank 1 reaches 20 cm, the water outlet pipeline 3 is used to extract water and impurities in the separation tank 1, the feed pipeline 4 is used to transport liquid Fischer-Tropsch wax into the separation tank 1, the oil outlet pipeline 5 is used to extract the white oil separated in the separation tank 1, the wax outlet pipeline 6 is used to extract the liquid wax in the separation tank, and a temperature control tube 7 is arranged in the separation tank 1, wherein the temperature control tube 7 is connected with cold water and hot water, and the hot water is heated by solar energy or air energy, so that energy can be saved. When in use, first add 20 cm high water into the separation tank 1, and then transport liquid Fischer-Tropsch wax into the separation tank 1 through the feed pipeline 4. After the liquid Fischer-Tropsch wax is transported, cold water at 20-25°C is transported into the temperature control tube 7 to form crystals inside the separation tank 1, and the wax begins to solidify. After waiting for 30-40 hours, the white oil and the wax are initially separated, and the impurities in the Fischer-Tropsch wax will precipitate into the water. At this time, there are three layers of substances in the separation tank 1, the bottom layer is water and impurities, the middle layer is white oil, and the top layer is solidified wax. Then, water and impurities are discharged through the water outlet pipe 3. After the water and impurities are discharged, water at 20-25°C is transported to the temperature control pipe 7 and maintained for 30-40 hours to make the crystals in the separation tank 1 sweat, and the white oil and wax are further separated to obtain purer wax. The white oil is then pumped into the oil tank through the oil outlet pipeline 5. At this time, only solidified wax is left in the separation tank 1. Hot water at 70°C is then transported to the temperature control pipe 7 to heat the solidified wax and turn it into liquid. The liquid wax is transported to the turnover tank through the wax outlet pipeline 6 for storage.

[0041] like Figure 2 As shown, an iron plate 8 is fixed below the temperature control tube 7, and a plurality of small holes are opened on the iron plate 8, and the iron plate 8 is used to support the wax on the upper part.

[0042] like Figure 1-2 As shown, a gas pipe is provided on the top of the separation tank 1, and the gas pipe is connected to a gas source. When the crystals in the separation tank 1 sweat, the gas source pressurizes the separation tank 1 through the gas pipe, and the separation tank 1 is pressurized to 0.1-0.2Mpa, thereby obtaining a purer wax.

[0043] like Figure 2As shown, a cutting assembly is arranged above the temperature control tube 7, and the cutting assembly is used to cut the solid wax. After the white oil is separated from the wax, the wax will be blocked by the temperature control tube 7 if it is thicker, and it will be difficult to move downward (it will be at the top of the temperature control tube 7), which reduces the heating effect of the temperature control tube 7. In this embodiment, after the cutting assembly cuts the solid wax, the whole piece of wax will be broken into small pieces of wax, and the small pieces of wax will fall between the gaps of the temperature control tube 7, thereby accelerating the melting efficiency. The cutting assembly includes a rotating tube 9, a blade 10 is installed at the lower part of the rotating tube 9, and the top of the rotating tube 9 extends to the top of the separation tank 1. A motor 11 is arranged above the separation tank 1, and the output shaft of the motor 11 is connected to the rotating tube 9. When the motor 11 is started, the motor 11 will drive the rotating tube 9 to rotate, and the rotating tube 9 drives the blade 10 to break the solid wax.

[0044] Furthermore, a water box 13 is fixedly installed on the top of the separation tank 1, the motor 11 is fixed to the top of the water box 13, the rotating tube 9 passes through the water box 13 and is rotatably sealed and connected to the water box 13, and a connecting hole 12 is provided in the part of the rotating tube 9 located inside the water box 13. Under the action of the connecting hole 12, the rotating tube 9 is connected to the water box 13, and a pipe 14 is installed on the water box 13. The pipe 14 is a hot water source. When the fixed wax inside the separation tank 1 is thicker, the wax will adhere to the rotating tube 9. If the motor 11 is started in this case, it will cause certain damage to the motor 11. Therefore, before starting the motor 11, hot water needs to be transported into the pipe 14. After the hot water enters the water box 13, it enters the rotating tube 9 through the connecting hole 12, thereby heating the rotating tube 9. The temperature of the rotating tube 9 increases and the wax adhered to it will melt. At this time, if the motor 11 is started again, it will be more stable and less damaged.

[0045] Furthermore, the pipeline 14 can also be connected to a high-pressure air source. When the wax in the separation tank 1 is broken and discharged from the separation tank 1, the water in the rotating tube 9 needs to be discharged in time to avoid rust inside the rotating tube 9 and to allow hot water to be injected later. A sealing mechanism 15 is provided at the bottom end of the rotating tube 9. By injecting high-pressure air into the pipeline 14, the pressure inside the rotating tube 9 can be increased, thereby pushing the sealing mechanism 15 downward under high pressure. When the sealing mechanism 15 moves down to a certain position, the water in the rotating tube 9 will be discharged. The blocking mechanism 15 includes a support rod 151 fixed inside the rotating tube 9, and a moving tube 152 is arranged below the support rod 151. The moving tube 152 is slidingly and sealingly connected to the rotating tube 9, the top of the moving tube 152 is in an open state, and the bottom is in a closed state. A spring 153 is fixedly installed inside the moving tube 152, and the top of the spring 153 is fixed to the support rod 151. A plurality of water outlet holes 154 are opened on the moving tube 152. When high-pressure air enters the rotating tube 9 and the pressure increases to a certain value, the moving tube 152 will be pushed to move downward until the water outlet hole 154 is located outside the rotating tube 9. The water inside the rotating tube 9 will flow out, thereby achieving the purpose of drainage. When the water is drained, the air supply is stopped, the spring 153 will contract, and pull the moving tube 152 to reset.

[0046] Furthermore, if Figure 6 As shown, two limit blocks 16 are fixed inside the rotating tube 9 , and the limit blocks 16 pass through the corresponding water outlet holes 154 . The limit blocks 16 are provided to prevent the moving tube 152 from completely moving out of the rotating tube 9 .

[0047] like Figure 2As shown, a limiting assembly is also provided on the separation tank 1, and the limiting assembly is used to limit the rotation of the solidified wax. Because when the blade 10 breaks the wax, the wax may rotate along with the blade 10, which is not conducive to the rapid breaking of the wax by the blade 10, and the limiting assembly is located inside the wax to prevent the wax from rotating, thereby ensuring the breaking efficiency of the wax by the blade 10, and the limiting assembly includes a plurality of limiting tubes 17 located inside the separation tank 1, and the top end of the limiting tube 17 extends to the top of the separation tank 1, and a first annular tube 18 and a second annular tube 19 are provided above the limiting tube 17, and the first annular tube 18 and the second annular tube 19 are provided above the limiting tube 17. The two annular tubes 19 are respectively provided with a water inlet pipe 20 and a water outlet pipe 21. The limiting tube 17 is provided with a U-shaped tube 22 inside. The two ends of the U-shaped tube 22 are respectively connected to the first annular tube 18 and the second annular tube 19. When in use, the water inlet pipe 20 is connected to a hot water source heated by solar energy or air energy. The hot water enters the first annular tube 18 through the water inlet pipe 20. The first annular tube 18 transports the hot water to the multiple U-shaped tubes 22 to heat the limiting tube 17, so that the heating tube heats the solidified wax, melts the wax near the limiting tube 17, and then moves the wax downward so that the blade 10 can break the wax. Through the limiting assembly, the solidified wax can only move downward and will not rotate, thereby ensuring the wax breaking effect of the blade 10.

[0048] A novel sweating type melt crystallization oil wax separation process, comprising:

[0049] Add 20 cm of water into the separation tank 1 and transport it through the water inlet pipe 2;

[0050] Liquid Fischer-Tropsch wax is delivered to the separation tank 1 via the feed line 4;

[0051] After the liquid Fischer-Tropsch wax is transported, cold water at 25-30°C is transported through the temperature control pipe 7 to cool the interior of the separation tank 1 and form crystals, and the wax begins to solidify;

[0052] After waiting for 30-40 hours, the white oil and wax are initially separated, and the impurities in the Fischer-Tropsch wax will settle into the water; at this time, there are three layers of substances in the separation tank 1, the bottom layer is water and impurities, the middle layer is white oil, and the top layer is solidified wax;

[0053] Discharge water and impurities through the water outlet pipe 3;

[0054] After the water and impurities are discharged, water at 20-25°C is transported to the temperature control pipe 7 for 30-40 hours to make the crystals in the separation tank 1 sweat, and the white oil and wax are further separated. At the same time, the pressure inside the separation tank 1 is pressurized to 0.1-0.2Mpa to obtain purer wax;

[0055] The white oil is pumped into the oil tank through the oil outlet pipeline 5;

[0056] When only solidified wax is left in the separation tank 1, hot water at 70°C is transported to the temperature control pipe 7 to heat the solidified wax and turn it into liquid;

[0057] The liquid wax is transported to the turnover tank through the wax outlet pipeline 6 for storage.

Claims

1. A novel sweating type melt crystallization oil wax separation device, characterized in that: include: A separation tank (1), wherein a water inlet pipeline (2), a water outlet pipeline (3), a feed pipeline (4), an oil outlet pipeline (5) and a wax outlet pipeline (6) are installed at the lower part of the separation tank (1); the water inlet pipeline (2) is used to transport clean water into the separation tank (1); the height of hot water in the separation tank (1) reaches 20 cm; the water outlet pipeline (3) is used to extract water and impurities in the separation tank (1); the feed pipeline (4) is used to transport liquid Fischer-Tropsch wax into the separation tank (1); the oil outlet pipeline (5) is used to extract white oil separated from the separation tank (1); the wax outlet pipeline (6) is used to extract liquid wax from the separation tank (1); a temperature control pipe (7) is arranged in the separation tank (1); the temperature control pipe (7) is connected to cold water and hot water.

2. A novel sweating type melt crystallization oil wax separation device according to claim 1, characterized in that: An iron plate (8) is fixed below the temperature control tube (7), and a plurality of small holes are formed on the iron plate (8).

3. A novel sweating type melt crystallization oil wax separation device according to claim 1, characterized in that: The top of the separation tank (1) is provided with an air supply pipe, and the air supply pipe is connected to a gas source.

4. A novel sweating type melt crystallization oil wax separation device according to claim 1, characterized in that: A cutting assembly is arranged above the temperature control tube (7), and the cutting assembly is used to cut solid wax. The cutting assembly comprises a rotating tube (9), a blade (10) is installed at the lower part of the rotating tube (9), and the top of the rotating tube (9) extends to the top of the separation tank (1). A motor (11) is arranged above the separation tank (1), and the output shaft of the motor (11) is connected to the rotating tube (9).

5. A novel sweating type melt crystallization oil wax separation device according to claim 4, characterized in that: A water box (13) is fixedly mounted on the top of the separation tank (1), the motor (11) is fixed to the top of the water box (13), the rotating tube (9) passes through the water box (13) and is rotationally sealed and connected to the water box (13), a connecting hole (12) is provided on the portion of the rotating tube (9) located inside the water box (13), a pipe (14) is mounted on the water box (13), and the pipe (14) is a hot water source.

6. A novel sweating type melt crystallization oil wax separation device according to claim 5, characterized in that: The pipeline (14) can also be connected to a high-pressure air source. A blocking mechanism (15) is provided at the bottom end of the rotating tube (9). The blocking mechanism (15) comprises a support rod (151) fixed inside the rotating tube (9). A moving tube (152) is provided below the support rod (151). The moving tube (152) is slidably and sealedly connected to the rotating tube (9). The top of the moving tube (152) is in an open state and the bottom is in a closed state. A spring (153) is fixedly installed inside the moving tube (152). The top end of the spring (153) is fixed to the support rod (151). A plurality of water outlet holes (154) are provided on the moving tube (152).

7. A novel sweating type melt crystallization oil wax separation device according to claim 6, characterized in that: Two limit blocks (16) are fixed inside the rotating tube (9), and the limit blocks (16) pass through the corresponding water outlet holes (154). The limit blocks (16) are arranged to prevent the moving tube (152) from completely moving out of the rotating tube (9).

8. A novel sweating type melt crystallization oil wax separation device according to claim 1, characterized in that: The separation tank (1) is also provided with a limit assembly, the limit assembly is used to limit the rotation of the solidified wax, the limit assembly comprises a plurality of limit tubes (17) located inside the separation tank (1), the top end of the limit tube (17) extends to the top of the separation tank (1), a first annular tube (18) and a second annular tube (19) are provided above the limit tube (17), a water inlet pipe (20) and a water outlet pipe (21) are respectively installed on the first annular tube (18) and the second annular tube (19), a U-shaped tube is provided inside the limit tube (17), and two ends of the U-shaped tube are respectively connected to the first annular tube (18) and the second annular tube (19).

9. A novel sweating type melt crystallization oil wax separation process, which is applicable to the novel sweating type melt crystallization oil wax separation device as claimed in any one of claims 1 to 8, characterized in that: include: Add 20 cm of water into the separation tank (1) and transport it through the water inlet pipe (2); delivering liquid Fischer-Tropsch wax to a separation tank via a feed line (4); After the liquid Fischer-Tropsch wax is transported, cold water at 25-30° C. is transported through the temperature control pipe (7) to cool the interior of the separation tank (1) and form crystals, so that the wax begins to solidify; After waiting for 30-40 hours, the white oil and wax are initially separated, and the impurities in the Fischer-Tropsch wax are precipitated into the water. At this time, there are three layers of material in the separation tank (1), the bottom layer is water and impurities, the middle layer is white oil, and the top layer is solidified wax. Discharge water and impurities through the outlet pipe; After the water and impurities are discharged, water at 20-25° C. is transported to the temperature control tube (7) and maintained for 30-40 hours to make the crystals in the separation tank (1) sweat, and the white oil and wax are further separated. At the same time, the pressure inside the separation tank (1) is increased to 0.1-0.2 Mpa to obtain a purer wax; The white oil is pumped into the oil tank through the oil outlet pipeline (5); When only solidified wax remains in the separation tank (1), hot water at 70°C is transported to the temperature control pipe (7) to heat the solidified wax and turn it into liquid; The liquid wax is transported to a turnover tank through a wax outlet pipeline (6) for storage.

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