Membrane filtration ethanol recovery apparatus

Abstract

The application belongs to the technical field of ethanol recovery, in particular to a membrane filtration ethanol recovery equipment, and proposes the following scheme: a support is provided with a raw material tank at the back side, the top of the raw material tank is connected with a feeding assembly, the end of the feeding assembly is connected with a heat exchange assembly, one side of the heat exchange assembly is connected with an evaporator, the inside of the evaporator is provided with an evaporation pipe, the back side of the evaporator is provided with a fan, and the bottom of the evaporator is provided with a liquid discharge valve; in the use process, the ethanol solution containing water enters the heat exchanger and the evaporator for treatment through the feeding assembly, is effectively vacuum filtered through a membrane filter, and then the product is cooled to below 35 DEG C in a product cooler and is sent to the inside of a product tank for finishing processing; the heat exchanger is arranged to improve the temperature of the feeding liquid through product heat exchange, thereby saving energy consumption.

Description

Technical Field

[0001] This invention relates to the field of ethanol recovery technology, and more particularly to membrane filtration ethanol recovery equipment. Background Technology

[0002] In industries such as chemical, pharmaceutical and biotechnology, ethanol is an important solvent and reaction medium. Its recycling and reuse are of great significance for energy conservation, emission reduction and cost reduction. At present, the ethanol recycling technologies widely used in the market mainly include distillation, adsorption and pervaporation membrane separation.

[0003] However, existing ethanol recovery devices suffer from high energy consumption, requiring significant energy expenditure for heating and cooling the solution.

[0004] Therefore, membrane filtration ethanol recovery equipment is needed. Summary of the Invention

[0005] The membrane filtration ethanol recovery device proposed in this invention solves the problem of high energy consumption required for heating and cooling the solution in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A membrane filtration ethanol recovery device includes a support frame, a heat exchange assembly, and a membrane assembly. A raw material tank is installed on the rear side of the support frame, a feeding assembly is connected to the top of the raw material tank, and a heat exchange assembly is connected to the end of the feeding assembly.

[0008] One side of the heat exchange component is connected to an evaporator, an evaporation tube is installed inside the evaporator, a fan is installed at the rear of the evaporator, a drain valve is provided at the bottom of the evaporator, a conveying pipe is connected to the top of the evaporator, a membrane module is connected to the end of the conveying pipe, and a second feed pipe is connected to the bottom of the membrane module.

[0009] The end of the second feed pipe is connected to the heat exchange component. The rear side of the heat exchange component is connected to the third feed pipe. The end of the third feed pipe is connected to the product cooler. One side of the product cooler is connected to the product tank. The front end of the membrane module is connected to the vacuum extraction pipe. The end of the vacuum extraction pipe is equipped with a condenser. One side of the condenser is connected to the vacuum machine. The side of the condenser is connected to the connecting pipe. The end of the connecting pipe is connected to the permeate tank. The bottom of the first membrane module is provided with a positioning frame. Several crossbars are horizontally welded in the middle of the positioning frame. Clamping rods are provided through the outer side of the crossbars. Torsion springs are connected to both sides of the clamping rods. Adapter plates are inserted into both ends of the positioning frame.

[0010] The feeding assembly includes a connecting frame. A first motor is mounted on the top of the feeding assembly. A transmission rod is rotatably connected to the output end of the first motor. A connecting rod is rotatably connected to one end of the transmission rod. A positioning block is slidably connected to the outer wall of the connecting rod. A swing slider is slidably connected to the bottom of the connecting rod. A rotating plate is screwed onto the side wall of the swing slider. A raw material box is mounted on the top of the connecting frame. A hopper is mounted on one side of the raw material box. A metering groove is mounted on the bottom of the hopper. A connecting rod is mounted on one end of the metering groove. A connecting plate is rotatably connected to one end of the connecting rod. A lifting slider is slidably connected to the surface of the connecting plate. A limit groove is slidably connected to one end of the lifting slider. A connecting rod is rotatably connected to one end of the connecting plate. A second motor is mounted on one end of the connecting rod.

[0011] Preferably, the heat exchange assembly includes a feed pipe, the end of which is connected to a heat exchanger, a spiral tube is installed at the end of the feed pipe, and the top of the spiral tube is connected to a first feed pipe.

[0012] Preferably, the spiral tube is spirally arranged, and the first feeding tube and the feed tube are connected through the spiral tube.

[0013] Preferably, the evaporator tube and the fan are arranged perpendicularly to each other, and the evaporator tube is arranged in a spiral shape.

[0014] Preferably, the membrane assembly includes a first membrane unit and a diaphragm fixedly installed inside the first membrane unit. A membrane feed side is provided on the left side of the diaphragm, and a membrane permeation side is provided on the right side of the diaphragm. The delivery pipe is connected to the top of the membrane feed side, and a conduit is connected to the top of the membrane permeation side. A second membrane unit is connected to the end of the conduit, and a third membrane unit is connected to the side of the second membrane unit.

[0015] Preferably, the membrane permeation side is evacuated by a condenser and a vacuum machine, using a vacuuming and condensation method to form a vapor pressure difference between the components on both sides of the membrane.

[0016] Preferably, the third membrane device is connected to the heat exchanger via the second feed pipe.

[0017] Preferably, the clamping rod forms a rotating structure with the crossbar via a torsion spring, and the clamping rod is symmetrically arranged about the central axis of the first membrane device.

[0018] This invention proposes a membrane filtration ethanol recovery device. Compared with the prior art, the advantages of this invention are:

[0019] 1. In the process of using this invention, the aqueous ethanol solution is fed into the heat exchanger and evaporator through the feeding assembly for processing. It is then effectively vacuum filtered through the membrane device. After processing, the product returns to the heat exchanger to exchange heat with the room temperature raw material. Then, the product enters the product cooler for further cooling to below 35°C and is sent to the product tank to complete the processing. The setting of the heat exchanger increases the temperature of the feed liquid through product heat exchange, thus saving energy consumption.

[0020] 2. This invention incorporates a heat exchanger, through which an aqueous ethanol solution is fed into the heat exchanger and evaporator for processing. Effective vacuum filtration is performed using a membrane device. The processed product then returns to the heat exchanger via a second feed pipe to exchange heat with the ambient-temperature raw material fed through a spiral tube. The heat exchanger increases the temperature of the feed liquid and decreases the temperature of the product, thus assisting subsequent evaporation and cooling operations and effectively saving energy.

[0021] 3. This invention incorporates an evaporator with a continuous residual liquid discharge system at the bottom. The discharge flow rate can be automatically adjusted based on the cleanliness, conductivity, and color of the material, ensuring clean material entering the membrane unit, extending membrane lifespan, and recommending that the discharged residual liquid be discharged to the material pretreatment area. A rear fan effectively improves internal evaporation efficiency, accelerates the evaporation process, and enhances processing efficiency.

[0022] 4. This invention, by setting up a membrane unit, uses vacuuming and condensation on the membrane permeate side to create a vapor pressure difference between the components on the feed and permeate sides. The permeate vapor enters the condenser under vacuum, and the condensed permeate is collected in a permeate tank through a connecting pipe, thus effectively completing separation and collection, facilitating subsequent processing operations. When the first membrane unit is installed and fixed, the clamping rod in the middle of the positioning frame can be pulled to rotate and open around the crossbar, and then tightened internally by a torsion spring, thus stably and quickly clamping and fixing the equipment. This facilitates the stable parallel installation of multiple membrane units, and the adapter plates on both sides allow for flexible and effective quick connection and assembly of the positioning frame and the support, forming a stable overall installation frame and improving the overall integrity of the equipment installation.

[0023] 5. This invention features a transmission rod. The rotation of the transmission rod causes the connecting rod to swing around the positioning block. The connecting rod, through a swinging slider, drives the rotating plate to rotate. The rotating plate then drives the raw material box to rotate, pouring the ethanol solution into the hopper, thus achieving automatic feeding of the ethanol solution. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the membrane filtration ethanol recovery device of the present invention.

[0025] Figure 2 This is a top view schematic diagram of the overall structure of the membrane filtration ethanol recovery device of the present invention.

[0026] Figure 3 This is a schematic diagram of the overall front view of the membrane filtration ethanol recovery device of the present invention.

[0027] Figure 4 This is a schematic diagram of the feeding assembly structure of the membrane filtration ethanol recovery equipment of the present invention.

[0028] Figure 5 This is a schematic diagram of the limiting slide structure of the membrane filtration ethanol recovery device of the present invention.

[0029] Figure 6 This is a cross-sectional structural diagram of the heat exchanger in the membrane filtration ethanol recovery device of the present invention.

[0030] Figure 7 This is a cross-sectional view of the evaporator in the membrane filtration ethanol recovery device of the present invention.

[0031] Figure 8 This is a cross-sectional structural diagram of the membrane unit in the membrane filtration ethanol recovery device of the present invention.

[0032] Figure 9 This is a schematic diagram of the positioning frame structure of the membrane filtration ethanol recovery device of the present invention.

[0033] Figure 10 This is a schematic diagram of the clamping rod and torsion spring installation structure of the membrane filtration ethanol recovery device of the present invention.

[0034] In the diagram: 1. Support frame; 2. Raw material tank; 3. Feeding assembly; 301. Connecting frame; 302. First motor; 303. Transmission rod; 304. Positioning block; 305. Connecting rod; 306. Swinging slider; 307. Raw material box; 308. Rotating plate; 309. Metering trough; 310. Second motor; 311. Connecting rod; 312. Connecting plate; 313. Lifting slider; 314. Limiting groove; 315. Connecting rotating rod; 316. Hopper; 4. Feeding pipe; 5. Heat exchanger; 6. Spiral tube; 7. First feeding pipe; 8. Steam... 9. Evaporator; 10. Fan; 11. Drain valve; 12. Delivery pipe; 13. First membrane unit; 14. Diaphragm; 15. Membrane feed side; 16. Membrane permeate side; 17. Conduit; 18. Second membrane unit; 19. Third membrane unit; 20. Second feed pipe; 21. Third feed pipe; 22. Product cooler; 23. Product tank; 24. Vacuum extraction pipe; 25. Condenser; 26. Vacuum machine; 27. Connecting pipe; 28. Permeate tank; 29. ​​Positioning frame; 30. Crossbar; 31. Clamping rod; 32. Torsion spring; 33. Adapter plate. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Please see Figure 1-10 The present invention provides a technical solution: a membrane filtration ethanol recovery device, including a support 1, a heat exchange component and a membrane component. A raw material tank 2 is installed on the rear side of the support 1. A feeding component 3 is connected to the top of the raw material tank 2. A heat exchange component is connected to the end of the feeding component 3.

[0037] An evaporator 8 is connected to one side of the heat exchange component. An evaporator tube 9 is installed inside the evaporator 8. A fan 10 is installed at the rear of the evaporator 8. A drain valve 11 is provided at the bottom of the evaporator 8. A conveying pipe 12 is connected to the top of the evaporator 8. A membrane module is connected to the end of the conveying pipe 12. A second feed pipe 20 is connected to the bottom of the membrane module.

[0038] Furthermore, the end of the second feed pipe 20 is connected to the heat exchange component, the rear side of the heat exchange component is connected to the third feed pipe 21, the end of the third feed pipe 21 is connected to the product cooler 22, one side of the product cooler 22 is connected to the product tank 23, the front end of the membrane module is connected to the vacuum extraction pipe 24, the end of the vacuum extraction pipe 24 is installed with the condenser 25, one side of the condenser 25 is connected to the vacuum machine 26, the side of the condenser 25 is connected to the connecting pipe 27, the end of the connecting pipe 27 is connected to the permeate tank 28, the bottom of the first membrane unit 13 is provided with a positioning frame 29, the middle of the positioning frame 29 is horizontally welded with several crossbars 30, the outer side of the crossbars 30 is provided with clamping rods 31, the two sides of the clamping rods 31 are connected with torsion springs 32, and the two ends of the positioning frame 29 are inserted with adapter pieces 33.

[0039] Furthermore, the feeding assembly includes a connecting frame 301. A first motor 302 is mounted on the top of the feeding assembly 3. A transmission rod 303 is rotatably connected to the output end of the first motor 302. A connecting rod 305 is rotatably connected to one end of the transmission rod 303. A positioning block 304 is slidably connected to the outer wall of the connecting rod 305. A swing slider 306 is slidably connected to the bottom of the connecting rod 305. A rotating plate 308 is screwed onto the side wall of the swing slider 306. A raw material box 307 is mounted on the top of the connecting frame 301. A hopper 316 is provided on one side of the material box 307. A metering groove 309 is provided at the bottom of the hopper 316. A connecting rod 315 is provided at one end of the metering groove 309. A connecting plate 312 is rotatably connected to one end of the connecting rod 315. A lifting slider 313 is slidably connected to the surface of the connecting plate 312. A limit groove 314 is slidably connected to one end of the lifting slider 313. A connecting rod 311 is rotatably connected to one end of the connecting plate 312. A second motor 310 is provided at one end of the connecting rod 311.

[0040] Furthermore, the heat exchange assembly includes a feed pipe 4, with a heat exchanger 5 connected to the end of the feed pipe 4, a spiral tube 6 installed at the end of the feed pipe 4, and a first feed pipe 7 connected to the top of the spiral tube 6. The heat exchanger 5 increases the temperature of the feed liquid through heat exchange and also decreases the temperature of the product through heat exchange.

[0041] Furthermore, the spiral tube 6 is spirally arranged, and the first feeding tube 7 and the feed tube 4 are connected through the spiral tube 6 to increase the contact surface and effectively improve the heat exchange efficiency.

[0042] Furthermore, the evaporator tube 9 and the fan 10 are arranged perpendicularly to each other, and the evaporator tube 9 is arranged in a spiral shape. The fan 10 can effectively improve the internal evaporation efficiency, effectively accelerate the evaporation process, and improve the processing efficiency.

[0043] Furthermore, the membrane assembly includes a first membrane unit 13 and a diaphragm 14 fixedly installed inside the first membrane unit 13. A membrane feed side 15 is provided on the left side of the diaphragm 14, and a membrane permeation side 16 is provided on the right side of the diaphragm 14. A delivery pipe 12 is connected to the top of the membrane feed side 15, and a conduit 17 is connected to the top of the membrane permeation side 16. The end of the conduit 17 is connected to a second membrane unit 18, and a third membrane unit 19 is connected to the side of the second membrane unit 18. The three sets are arranged to efficiently process and filter ethanol.

[0044] Furthermore, the membrane permeate side 16 is evacuated by the condenser 25 and the vacuum machine 26. The vacuuming and condensation method is used to form a vapor pressure difference between the components on both sides of the membrane. The permeate vapor enters the condenser 25 under the suction of the vacuum machine 26.

[0045] Furthermore, the third membrane device 19 is connected to the heat exchanger 5 through the second feed pipe 20. The processed product returns to the heat exchanger 5 through the second feed pipe 20 to exchange heat with the room temperature raw material transported through the spiral tube 6.

[0046] Furthermore, the clamping rod 31 forms a rotating structure with the crossbar 30 via the torsion spring 32, and the clamping rod 31 is symmetrically arranged about the central axis of the first membrane unit 13, thereby stably and quickly clamping and fixing the equipment, which is conducive to the stable parallel installation of multiple membrane units.

[0047] Working principle: First, the ethanol solution enters the feeding assembly 3. At this time, the rotation of the transmission rod 303 drives the connecting rod 305 to swing around the positioning block 304. The connecting rod 305 drives the rotating plate 308 to rotate through the swing slider 306. The rotating plate 308 drives the raw material box 307 to rotate, pouring the ethanol solution into the hopper 316, realizing the automatic feeding of the ethanol solution. Then, the water-containing ethanol solution is transported into the heat exchanger 5 and evaporator 8 for processing. It undergoes effective vacuum filtration through the membrane device. After processing, the product returns to the heat exchanger 5 through the second feeding pipe 20 to exchange heat with the room temperature raw material transported through the spiral tube 6. The setting of the heat exchanger 5 increases the temperature of the feed liquid through heat exchange and also reduces the temperature of the product through heat exchange, which provides assistance for subsequent evaporation and cooling operations and effectively saves energy consumption.

[0048] Next, a continuous residual liquid discharge system with a drain valve 11 is designed at the bottom of the evaporator 8. The flow rate of the residual liquid at the bottom of the evaporator 8 can be automatically adjusted according to the cleanliness of the material, its conductivity and color, so that the material entering the membrane device is clean and the service life of the membrane is extended. The discharged residual liquid is recommended to be discharged to the material pretreatment area. A fan 10 is set at the rear to effectively improve the internal evaporation efficiency, effectively accelerate the evaporation process and improve the processing efficiency.

[0049] Finally, by using vacuuming and condensation on the membrane permeate side 16, a vapor pressure difference is formed between the components on the membrane feed side 16 and the membrane permeate side 15. The permeate vapor enters the condenser 25 under the suction of the vacuum pump 26. The condensed permeate is collected in the permeate tank 28 through the connecting pipe 27, thus effectively completing the separation and collection, facilitating subsequent processing operations. When the first membrane unit 13 is installed and fixed, the clamping rod 31 in the middle of the positioning frame 29 can be pulled to rotate and open around the crossbar 30, and then tightened by the torsion spring 32, thus stably and quickly clamping and fixing the equipment. This facilitates the stable parallel installation of multiple membrane units, and the adapter plates 33 on both sides can be inserted to ensure that the positioning frame 29 and the bracket 1 can be flexibly and effectively connected and assembled quickly to form an overall stable frame, improving the overall integrity of the equipment installation.

[0050] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A membrane filtration ethanol recovery device, comprising a support frame (1), a heat exchange assembly, and a membrane assembly, characterized in that: A raw material tank (2) is installed on the rear side of the support (1), and a feeding assembly (3) is connected to the top of the raw material tank (2). A heat exchange assembly is connected to the end of the feeding assembly (3). One side of the heat exchange assembly is connected to an evaporator (8), an evaporation tube (9) is installed inside the evaporator (8), a fan (10) is installed at the rear of the evaporator (8), a drain valve (11) is provided at the bottom of the evaporator (8), a conveying pipe (12) is connected to the top of the evaporator (8), a membrane assembly is connected to the end of the conveying pipe (12), and a second feed pipe (20) is connected to the bottom of the membrane assembly. The end of the second feed pipe (20) is connected to the heat exchange assembly, the rear side of the heat exchange assembly is connected to the third feed pipe (21), the end of the third feed pipe (21) is connected to the product cooler (22), one side of the product cooler (22) is connected to the product tank (23), the front end of the membrane assembly is connected to the vacuum extraction pipe (24), the end of the vacuum extraction pipe (24) is equipped with a condenser (25), one side of the condenser (25) is connected to the vacuum machine (26), and the side of the condenser (25) is connected to the connecting pipe (). 27), the end of the connecting pipe (27) is connected to the permeate tank (28), the membrane assembly includes a first membrane unit (13) and a diaphragm (14) fixedly installed inside the first membrane unit (13), a positioning frame (29) is provided at the bottom of the first membrane unit (13), a number of crossbars (30) are horizontally welded in the middle of the positioning frame (29), a clamping rod (31) is provided through the outside of the crossbar (30), a torsion spring (32) is connected to both sides of the clamping rod (31), and an adapter piece (33) is inserted into both ends of the positioning frame (29). The feeding assembly includes a connecting frame (301). A first motor (302) is provided on the top of the feeding assembly (3). A transmission rod (303) is rotatably connected to the output end of the first motor (302). A connecting rod (305) is rotatably connected to one end of the transmission rod (303). A positioning block (304) is slidably connected to the outer wall of the connecting rod (305). A swing slider (306) is slidably connected to the bottom of the connecting rod (305). A rotating plate (308) is screwed onto the side wall of the swing slider (306). A raw material box (307) is provided on the top of the connecting frame (301). A hopper (316) is provided on one side of (307), and a metering groove (309) is provided at the bottom of the hopper (316). A connecting rod (315) is provided at one end of the metering groove (309). A connecting plate (312) is rotatably connected to one end of the connecting rod (315). A lifting slider (313) is slidably connected to the surface of the connecting plate (312). A limit groove (314) is slidably connected to one end of the lifting slider (313). A connecting rod (311) is rotatably connected to one end of the connecting plate (312). A second motor (310) is provided at one end of the connecting rod (311).

2. The membrane filtration ethanol recovery equipment according to claim 1, characterized in that: The heat exchange assembly includes a feed pipe (4), the end of which is connected to a heat exchanger (5), and a spiral tube (6) is installed at the end of the feed pipe (4), with a first feed pipe (7) connected to the top of the spiral tube (6).

3. The membrane filtration ethanol recovery equipment according to claim 2, characterized in that: The spiral tube (6) is spirally arranged, and the first feeding tube (7) and the feed tube (4) are connected through the spiral tube (6).

4. The membrane filtration ethanol recovery equipment according to claim 1, characterized in that: The evaporator tube (9) and the fan (10) are arranged perpendicularly to each other, and the evaporator tube (9) is arranged in a spiral shape.

5. The membrane filtration ethanol recovery equipment according to claim 1, characterized in that: The membrane feed side (15) is provided on the left side of the diaphragm (14), and the membrane permeation side (16) is provided on the right side of the diaphragm (14). The delivery pipe (12) is connected to the top of the membrane feed side (15), and the top of the membrane permeation side (16) is connected to the conduit (17). The end of the conduit (17) is connected to the second membrane device (18), and the side of the second membrane device (18) is connected to the third membrane device (19).

6. The membrane filtration ethanol recovery equipment according to claim 5, characterized in that: The membrane permeation side (16) is evacuated by a condenser (25) and a vacuum machine (26), and the evacuation and condensation are used to form a vapor pressure difference between the components on both sides of the membrane.

7. The membrane filtration ethanol recovery equipment according to claim 5, characterized in that: The third membrane device (19) is connected to the heat exchanger (5) through the second feed pipe (20).

8. The membrane filtration ethanol recovery equipment according to claim 1, characterized in that: The clamp (31) forms a rotating structure with the crossbar (30) through the torsion spring (32), and the clamp (31) is symmetrically arranged about the central axis of the first membrane device (13).

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