Device for catalytic separation reaction of biodiesel and use method therefor

Abstract

Provided are a device for catalytic separation reaction of biodiesel and a use method therefor. The device for catalytic separation reaction of biodiesel comprises: a reactor (1), a bottom surface of which is provided with a discharge pipe (39); a carbon film (2) arranged inside the reactor (1) and used for the permeation of fatty acid methyl esters and glycerol; and a rotating hole (3) formed on the top surface of the reactor (1), wherein a stirring column (5) is movably mounted inside the rotating hole (3), a plurality of stirring rods (6) are arranged outside the stirring column (5), and two limiting grooves (34) are formed on the outer cylindrical surface of a rotating shaft (4). The rotating shaft (4) drives a reciprocating screw rod (18) to rotate, driving a piston plate (19) to compress the air; and the compressive force on piston blocks (14) in the stirring rods (6) gradually increases, driving scrapers (16) to slowly move outward so as to gradually scrap off the fatty acid methyl esters and glycerol by layer from the inner wall of the reactor, thereby achieving a better scraping effect and enhancing the oil yield from the reaction of feedstock oil.

Description

A device for catalytic separation reaction of biodiesel and its use method TECHNICAL FIELD

[0001] The present application relates to the technical field of bio-energy, in particular to a device for catalytic separation reaction of biodiesel and its use method. BACKGROUND

[0002] Biodiesel refers to fatty acid methyl or ethyl ester formed by esterification of vegetable oil (such as rapeseed oil, soybean oil, peanut oil, corn oil, cottonseed oil, etc.), animal oil (such as fish oil, lard, tallow, mutton oil, etc.), waste oil or microbial oil and methanol or ethanol; biodiesel is a typical "green energy" with good environmental performance, good engine starting performance, good fuel performance, wide raw material sources, and renewable characteristics. Vigorously developing biodiesel has important strategic significance for economic sustainable development, promoting energy substitution, reducing environmental pressure, and controlling urban air pollution.

[0003] According to the Chinese patent with application number CN202221454175.6, a kind of biodiesel catalytic separation reaction device is disclosed, including reaction kettle, reaction cavity is equipped in the reaction kettle, the upper and lower ends of the reaction kettle are respectively installed with feed pipe and discharge pipe, carbon film is equipped in the reaction cavity, the upper end of the reaction kettle is installed with motor, the output shaft end of the motor extends into reaction cavity and is fixedly connected with mounting block, mobile cavity is equipped in the mounting block, mobile block is slidably connected in the mobile cavity, the upper end of the mobile block is elastically connected with the inner top of mobile cavity by spring, the lower end of the mobile block is fixedly connected with stirring rod, the lower end of the stirring rod penetrates mounting block and is installed with multiple stirring blades;The device is provided with electromagnet and spring and other structures, can drive stirring rod and corresponding stirring blade to move up and down while stirring rod rotates and mixes, improve the mixing efficiency, and the stirring blade is provided with fan blade shape and straight rod shape, can form turbulent flow, further improve the mixing reaction efficiency.

[0004] At present, a kind of biodiesel catalytic separation reaction device still has some deficiencies, for example: biodiesel and glycerol have stickiness, when raw material oil is generated in the reactor during stirring process, biodiesel and glycerol will stick to the inner wall, biodiesel and glycerol are not easy to be scraped off after adhering to the inner wall, which affects the oil yield of subsequent biodiesel and glycerol.

[0005] SUMMARY

[0006] In view of the deficiencies of the prior art, the present application provides a device for catalytic separation reaction of biodiesel and a method for using the same, which solves the problem that the biodiesel and glycerol generated during the stirring of raw oil in the reactor adhere to the inner wall and are not easy to be scraped off, thereby affecting the oil yield of the subsequent biodiesel and glycerol.

[0007] The above technical object of the present application is achieved by the following technical solutions:

[0008] A device for catalytic separation reaction of biodiesel comprises:

[0009] A reactor is provided with a discharge pipe at the bottom surface thereof;

[0010] A carbon film is arranged inside the reactor for passage of fatty acid methyl ester and glycerol;

[0011] A rotating hole is formed in the top surface of the reactor, a rotating shaft is movably mounted in the rotating hole, a stirring column is arranged outside the rotating shaft, a plurality of stirring rods are arranged outside the stirring column, two limiting grooves are formed in the outer circumferential surface of the rotating shaft, two limiting blocks are fixedly mounted on the inner circumferential surface of the stirring column, and the limiting blocks and the limiting grooves are movably connected together;

[0012] A mounting plate is arranged on the top surface of the reactor, a driving motor is fixedly mounted on the bottom surface of the mounting plate, a first sprocket is fixedly sleeved on the shaft of the driving motor, a second sprocket is fixedly sleeved on the outside of the rotating shaft, and a chain is arranged outside the first sprocket and the second sprocket;

[0013] A scraping assembly is arranged at one end of the stirring rod for scraping off the reaction products on the inner wall, the scraping assembly comprises an expansion hole formed on one side of the stirring rod, an expansion rod is movably sleeved on the inner wall of the expansion hole, a piston block is arranged inside the stirring rod, the piston block is fixedly connected with the expansion rod, and a scraper is fixedly mounted at one end of the expansion rod;

[0014] A lifting member is arranged outside the stirring column for lifting the stirring column.

[0015] Preferably, the scraping assembly further comprises: an air plenum fixedly installed on the top surface of the reactor, an internal piston plate of the air plenum, two push rods fixedly installed on the bottom surface of the piston plate, a push hole opened on the bottom surface of the air plenum, the push rods passing through the push hole and extending to the outside, a connecting pipe provided on the bottom surface of the air plenum, an air inlet pipe provided in the internal rotating shaft, an air inlet hole opened on the internal bottom surface of the rotating shaft, one end of the air inlet pipe fixedly sleeved with the air inlet hole, and the other end of the air inlet pipe fixedly sleeved with the connecting pipe.

[0016] Preferably, the external rotating shaft is fixedly sleeved with a reciprocating screw rod, the connecting plate is fixedly connected with the push rod, an air release hole is opened on the internal bottom surface of the rotating shaft, and an air release valve is fixedly installed in the air release hole.

[0017] Preferably, the top surface of the piston plate is provided with a mounting hole, a one-way cylinder is fixedly installed on the inner circular wall surface of the mounting hole, a sealing cover is provided on the bottom surface of the one-way cylinder, two movable holes are opened on the bottom surface of the one-way cylinder, a connecting rod is movably sleeved in the movable hole, the connecting rod is fixedly connected with the sealing cover, and a spring is provided on the external connecting rod.

[0018] Preferably, the external air inlet pipe is provided with a one-way valve.

[0019] Preferably, the lifting part comprises a rotating ring rotatably installed on the external stirring column, a connecting hole is opened on the top surface of the reactor, a lifting rod is fixedly installed on the bottom surface of the connecting plate, and the lifting rod is fixedly connected with the rotating ring.

[0020] Preferably, the discharge pipe is connected with the biodiesel storage tank and the glycerol storage tank through the centrifuge, respectively.

[0021] A method for using a biodiesel catalytic separation reaction device, which is suitable for any one of the above-mentioned biodiesel catalytic separation reaction devices, and the specific steps are as follows:

[0022] Step one: pour the raw oil into the reactor, add the catalyst, and perform esterification reaction;

[0023] Step two: start the driving motor, the driving motor drives the first sprocket to rotate, the chain drives the second sprocket to rotate, so that the rotating shaft drives the stirring column to rotate, and the raw oil and the catalyst are stirred and mixed through the stirring rod on the stirring column;

[0024] Step three: after the catalytic reaction of the raw oil, fatty acid methyl ester and glycerol are generated;

[0025] Step four: while the stirring rod rotates, the fatty acid methyl ester and glycerol adhering to the inner wall of the reactor are scraped off layer by layer by the scraper;

[0026] Step six: the unreacted raw oil cannot pass through the carbon film, and the fatty acid methyl ester and glycerol generated by the reaction can pass through the carbon film;

[0027] Step seven: the glycerol and fatty acid methyl alcohol are separated by the centrifugal machine and stored in the biodiesel storage tank and the glycerol storage tank, respectively.

[0028] In summary, the present application has the following beneficial effects:

[0029] By setting the scraping assembly, the driving motor, the shaft of the driving motor drives the first sprocket to rotate, the first sprocket drives the second sprocket to rotate through the chain, the rotating shaft rotates, the limiting block of the stirring column is clamped in the limiting groove of the rotating shaft, so that the rotating shaft rotates while the rotating shaft rotates, the connecting plate on the reciprocating screw rod drives the push rod to move up and down, the piston plate is extruded, the air is conveyed into the stirring column through the air inlet pipe, the extrusion force of the piston block in the stirring rod gradually increases, the scraper slowly moves outward, the scraper gradually contacts the fatty acid methyl ester (biodiesel) and glycerol on the inner wall of the reactor, and the fatty acid methyl ester (biodiesel) and glycerol on the inner wall of the reactor are scraped off layer by layer, which is beneficial to realize better scraping effect and improve the oil yield of the raw oil reaction.

[0030] By setting the rotating ring, when the reciprocating screw rod drives the connecting plate to move up and down, the rotating ring connected by the lifting rod drives the stirring column to move up and down, the scraper on the stirring column can increase the scraping area, and the up-down movement during the rotation of the stirring rod can improve the stirring effect. BRIEF DESCRIPTION OF DRAWINGS

[0031] Fig. 1 is a schematic diagram of the three-dimensional structure of the present application;

[0032] Fig. 2 is a schematic diagram of the reactor structure of the present application;

[0033] Fig. 3 is a schematic diagram of the scraper structure of the present application;

[0034] Fig. 4 is a schematic diagram of the stirring column structure of the present application;

[0035] Fig. 5 is an enlarged schematic diagram of the local structure at A in Fig. 4;

[0036] Fig. 6 is a schematic diagram of the air booster bin structure of the present application;

[0037] Fig. 7 is a schematic diagram of the sealing cover structure of the present application;

[0038] Fig. 8 is a schematic diagram of the one-way cylinder structure of the present application

[0039] Figure 9 is a schematic diagram of the discharge pipe structure of the present application.

[0040] Reference signs: 1, reactor; 2, carbon film; 3, rotating hole; 4, rotating shaft; 5, stirring column; 6, stirring rod; 7, one-way valve; 8, mounting plate; 9, driving motor; 10, first sprocket; 11, second sprocket; 12, chain; 13, telescopic rod; 14, piston block; 15, telescopic hole; 16, scraper; 17, air booster bin; 18, reciprocating screw rod; 19, piston plate; 20, connecting plate; 21, push hole; 22, push rod; 23, connecting pipe; 24, air inlet pipe; 25, air inlet hole; 26, one-way cylinder; 27, sealing cover; 28, movable hole; 29, connecting rod; 30, spring; 31, rotating ring; 32, lifting rod; 33, connecting hole; 34, limiting groove; 35, limiting block; 36, centrifuge; 37, biodiesel storage tank; 38, glycerol storage tank; 39, discharge pipe; 40, mounting hole; 41, air vent hole; 42, air vent valve. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0042] Referring to Figures 1-9, a biodiesel catalytic separation reaction device comprises:

[0043] The reactor 1 is provided with a discharge pipe 39 on the bottom surface thereof;

[0044] The carbon film 2 is arranged in the interior of the reactor 1 and used for passing fatty acid methyl ester and glycerol;

[0045] The rotating hole 3 is arranged on the top surface of the reactor 1, the rotating hole 3 is movably mounted with the rotating shaft 4 in the interior thereof, the rotating shaft 4 is a hollow cylindrical structure, the rotating shaft 4 is provided with the stirring column 5 on the exterior thereof, the stirring column 5 is a hollow cylindrical structure, the stirring column 5 is provided with a plurality of stirring rods 6 on the exterior thereof, the stirring rods 6 are hollow cylindrical structures, the outer circular wall surface of the rotating shaft 4 is provided with two limiting grooves 34, the inner circular wall surface of the stirring column 5 is fixedly mounted with two limiting blocks 35, the limiting blocks 35 and the limiting grooves 34 are movably connected together; the mounting plate 8 is arranged on the top surface of the reactor 1, the bottom surface of the mounting plate 8 is fixedly mounted with the driving motor 9, the shaft of the driving motor 9 is fixedly sleeved with the first sprocket 10, the exterior of the rotating shaft 4 is fixedly sleeved with the second sprocket 11, the exterior of the first sprocket 10 and the second sprocket 11 is provided with the chain 12;

[0046] The scraping assembly is arranged at one end of the stirring rod 6 and is used for scraping the reaction product on the inner wall; the scraping assembly comprises an expansion hole 15 which is arranged on one side of the stirring rod 6, an expansion rod 13 which is movably sleeved on the inner wall of the expansion hole 15, a piston block 14 which is arranged in the stirring rod 6, and a scraper 16 which is fixedly installed at one end of the expansion rod 13;

[0047] The lifting member is arranged outside the stirring column 5 and is used for lifting and lowering the stirring column 5

[0048] When the raw oil enters the reactor 1, the catalyst is added, the driving motor 9 is started, the shaft of the driving motor 9 drives the first sprocket 10 to rotate, the first sprocket 10 drives the second sprocket 11 to rotate through the chain 12, the rotating shaft 4 is rotated, the limiting block 35 of the stirring column 5 is clamped in the limiting groove 34 of the rotating shaft 4, so that the rotating shaft 4 is rotated while driving the stirring column 5 to rotate, the raw oil and the catalyst are stirred and mixed through the stirring rod 6 on the stirring column 5, the mixing efficiency is improved, the raw oil is reacted with the catalyst to generate fatty acid methyl ester (biodiesel) and glycerol, and the fatty acid methyl ester (biodiesel) and glycerol adhered to the inner wall of the reactor 1 are scraped off by the scraper 16 on the expansion rod 13 in the stirring process, the waste of the fatty acid methyl ester (biodiesel) and glycerol is reduced, and the oil yield generated by the reaction of the raw oil is improved.

[0049] As a further scheme of the present application, the scraping assembly further comprises: an air pressurizing bin 17 which is fixedly installed on the top surface of the reactor 1, a piston plate 19 which is arranged in the air pressurizing bin 17, two push rods 22 which are fixedly installed on the bottom surface of the piston plate 19, a push hole 21 which is arranged on the bottom surface of the air pressurizing bin 17, the push rod 22 extending to the outside through the push hole 21, a connecting pipe 23 which is arranged on the bottom surface of the air pressurizing bin 17, an air inlet pipe 24 which is arranged in the rotating shaft 4, an air inlet hole 25 which is arranged on the inner bottom surface of the rotating shaft 4, one end of the air inlet pipe 24 being fixedly sleeved with the air inlet hole 25, and the other end of the air inlet pipe 24 being fixedly sleeved with the connecting pipe 23;

[0050] When the scraper 16 scrapes the fatty acid methyl ester (biodiesel) and glycerol adhered to the inner wall of the reactor 1, the staff can drive the piston plate 19 to reciprocate up and down through the push rod 22, the piston plate 19 gradually extrudes the air in the air pressurizing bin 17 into the air inlet pipe 24, the air is transported into the stirring column 5 through the air inlet pipe 24, the extrusion force of the air on the piston block 14 in the stirring rod 6 gradually increases, the scraper 16 is slowly moved outward, the scraper 16 gradually contacts the fatty acid methyl ester (biodiesel) and glycerol on the inner wall of the reactor 1, and the fatty acid methyl ester (biodiesel) and glycerol on the inner wall of the reactor 1 are scraped layer by layer after the scraper 16 abuts against the inner wall, which is conducive to achieving a better scraping effect.

[0051] As a further scheme of the present application, the outer fixing sleeve of the rotating shaft 4 is provided with a reciprocating screw rod 18, the outer thread of the reciprocating screw rod 18 is connected with a connecting plate 20, the connecting plate 20 is fixedly connected with a push rod 22, the inner bottom surface of the rotating shaft 4 is provided with a gas leakage hole 41, and the inner part of the gas leakage hole 41 is fixedly installed with a gas leakage valve 42.

[0052] By setting the reciprocating screw rod 18, when the rotating shaft 4 rotates, the reciprocating screw rod 18 is driven to rotate, the connecting plate 20 on the reciprocating screw rod 18 drives the push rod 22 to move up and down reciprocally, and drives the piston plate 19 to extrude air. When the air pressure in the inside of the stirring column 5 reaches the maximum value, the air enters the inside of the gas leakage valve 42, drives the valve core of the gas leakage valve 42, drives the valve plate to open, and then releases a certain amount of compressed air, so that the rotating shaft 4 can continuously rotate.

[0053] As a further scheme of the present application, the top surface of the piston plate 19 is provided with a mounting hole 40, the inner circular wall surface of the mounting hole 40 is fixedly installed with a one-way cylinder 26, the bottom surface of the one-way cylinder 26 is provided with a sealing cover 27, the bottom surface of the one-way cylinder 26 is provided with two movable holes 28, the inside of the movable hole 28 is movably sleeved with a connecting rod 29, the connecting rod 29 is fixedly connected with the sealing cover 27, and the outside of the connecting rod 29 is provided with a spring 30.

[0054] By setting the one-way cylinder 26, when the piston plate 19 moves upward, a negative pressure is formed below the piston plate 19, the atmospheric pressure pushes away the sealing cover 27, at this time the spring 30 is in a compressed state, air enters below the piston plate 19, when the piston plate 19 moves downward, a high pressure is formed at the bottom of the piston plate 19, at this time the spring 30 is pushed away, drives the sealing cover 27 to close the one-way cylinder 26, so that the air below the piston plate 19 is extruded into the stirring column 5, prevents the extruded air from leaking upward, and is beneficial to improve the air injection amount.

[0055] As a further scheme of the present application, the outside of the air inlet pipe 24 is provided with a one-way valve 7.

[0056] By setting the one-way valve 7, when the piston plate 19 moves upward, the air in the stirring column 5 is prevented from being pumped out through the one-way valve 7, so that the scraper 16 is stretched and retracted, and the scraping effect of the scraper 16 on the fatty acid methyl ester (biodiesel) and glycerol on the inner wall of the reactor 1 is affected.

[0057] As a further scheme of the present application, the lifting member includes a rotating ring 31, the rotating ring 31 is rotatably installed on the outside of the stirring column 5, the top surface of the reactor 1 is provided with a connecting hole 33, the bottom surface of the connecting plate 20 is fixedly installed with a lifting rod 32, and the lifting rod 32 is fixedly connected with the rotating ring 31.

[0058] Through setting the rotating ring 31, when the reciprocating wire rod 18 drives the connecting plate 20 to reciprocate up and down, the rotating ring 31 connected by the lifting rod 32 drives the stirring column 5 to reciprocate up and down, the scraper 16 on the stirring column 5 can increase the scraping area, and the up-and-down movement during the rotation of the stirring rod 6 can improve the stirring effect.

[0059] As a further scheme of the present application, the discharge pipe 39 is connected with the biodiesel storage tank 37 and the glycerol storage tank 38 respectively through the centrifuge 36.

[0060] Through setting the centrifuge 36, after the fatty acid methyl ester and glycerol generated by the reaction pass through the carbon film 2, the centrifuge 36 is used for separation, and the fatty acid methyl ester and glycerol are stored in the biodiesel storage tank 37 and the glycerol storage tank 38 respectively, so that the biodiesel with higher purity and better use effect can be obtained.

[0061] A use method of the biodiesel catalytic separation reaction device, which is suitable for any one of the biodiesel catalytic separation reaction devices, and the specific steps are as follows:

[0062] Step one: pour the raw oil into the reactor 1, add the catalyst, and perform esterification reaction;

[0063] Step two: start the driving motor 9, the driving motor 9 drives the first sprocket 10 to rotate, the second sprocket 11 is driven to rotate through the chain 12, so that the rotating shaft 4 drives the stirring column 5 to rotate, and the raw oil and the catalyst are stirred and mixed through the stirring rod 6 on the stirring column 5;

[0064] Step three: after the catalytic reaction of the raw oil, fatty acid methyl ester and glycerol are generated;

[0065] Step four: while the stirring rod 6 rotates, the fatty acid methyl ester and glycerol adhered to the inner wall of the reactor 1 are scraped layer by layer through the scraper 16;

[0066] Step six: the unreacted raw oil cannot pass through the carbon film 2, and the fatty acid methyl ester and glycerol generated by the reaction can pass through the carbon film 2;

[0067] Step seven: the glycerol and the fatty acid methyl ester are separated through the centrifuge 36 and stored in the biodiesel storage tank 37 and the glycerol storage tank 38 respectively.

[0068] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims.

Claims

1. A device for catalytic separation of biodiesel, characterized in that, Include: The reactor (1), the bottom surface of the reactor (1) is provided with a discharge pipe (39); Carbon film (2), set in the inside of the reactor (1), for fatty acid methyl ester and glycerol pass through; Rotary hole (3), set up in the top surface of the reactor (1), the inside of the rotary hole (3) is movably installed with rotary shaft (4), the outside of the rotary shaft (4) is provided with stirring column (5), the outside of the stirring column (5) is provided with a plurality of stirring rod (6), the outer circular wall surface of the rotary shaft (4) is provided with two limiting grooves (34), the inner circular wall surface of the stirring column (5) is fixedly installed with two limiting blocks (35), the limiting block (35) and the limiting groove (34) are movably connected together; Mounting plate (8), set in the top surface of the reactor (1), the bottom surface of the mounting plate (8) is fixedly installed with drive motor (9), the shaft of the drive motor (9) is fixedly sleeved with first sprocket (10), the outside of the rotary shaft (4) is fixedly sleeved with second sprocket (11), the outside of the first sprocket (10) and the second sprocket (11) is provided with chain (12); Scraping assembly, set in one end of stirring rod (6), for scraping the inner wall reaction product;The scraping assembly comprises telescopic hole (15), the telescopic hole (15) is set on one side of the stirring rod (6), the inner wall of the telescopic hole (15) is movably sleeved with telescopic rod (13), the inside of the stirring rod (6) is provided with piston block (14), the piston block (14) is fixedly connected with the telescopic rod (13), one end of the telescopic rod (13) is fixedly installed with scraper (16); Lifting piece, set in the outside of the stirring column (5), for lifting the stirring column (5).

2. A device for catalytic separation reaction of biodiesel according to claim 1, characterized in that, The scraping assembly further comprises: air pressure chamber (17), the air pressure chamber (17) is fixedly installed on the top surface of the reactor (1), the inside of the air pressure chamber (17) is provided with piston plate (19), the bottom surface of the piston plate (19) is fixedly installed with two push rods (22), the bottom surface of the air pressure chamber (17) is provided with push hole (21), the push rod (22) passes through the push hole (21) and extends to the outside, the bottom surface of the air pressure chamber (17) is provided with connecting pipe (23), the inside of the rotary shaft (4) is provided with air inlet pipe (24), the inside bottom surface of the rotary shaft (4) is provided with air inlet hole (25), one end of the air inlet pipe (24) and the air inlet hole (25) are fixedly sleeved together, the other end of the air inlet pipe (24) and the connecting pipe (23) are fixedly sleeved together.

3. A device for catalytic separation reaction of biodiesel according to claim 2, characterized in that, The outside of the rotary shaft (4) is fixedly sleeved with reciprocating screw rod (18), the outside of the reciprocating screw rod (18) is threadedly connected with connecting plate (20), the connecting plate (20) is fixedly connected with the push rod (22), the inside bottom surface of the rotary shaft (4) is provided with air vent hole (41), the inside of the air vent hole (41) is fixedly installed with air vent valve (42).

4. The device for catalytic separation reaction of biodiesel according to claim 2, characterized in that, The top surface of the piston plate (19) is provided with a mounting hole (40), the inner circular wall surface of the mounting hole (40) is fixedly provided with a one-way cylinder (26), the bottom surface of the one-way cylinder (26) is provided with a sealing cover (27), the bottom surface of the one-way cylinder (26) is provided with two movable holes (28), the inside of the movable hole (28) is movably sleeved with a connecting rod (29), the connecting rod (29) is fixedly connected with the sealing cover (27), and the outside of the connecting rod (29) is provided with a spring (30).

5. The device for catalytic separation reaction of biodiesel according to claim 2, characterized in that, The outside of the air inlet pipe (24) is provided with a one-way valve (7).

6. A device for catalytic separation reaction of biodiesel according to claim 3, characterized in that, The lifting piece comprises a rotating ring (31), the rotating ring (31) is rotatably installed outside the stirring column (5), the top surface of the reactor (1) is provided with a connecting hole (33), the bottom surface of the connecting plate (20) is fixedly provided with a lifting rod (32), and the lifting rod (32) is fixedly connected with the rotating ring (31).

7. The device for catalytic separation reaction of biodiesel according to claim 1, characterized in that, The discharge pipe (39) is connected with the biodiesel storage tank (37) and the glycerol storage tank (38) through the centrifuge (36).

8. A method for using a device for catalytic separation of biodiesel, according to any one of claims 1 to 7, characterized in that, The specific steps are as follows: Step one: pour the raw oil into the reactor (1), add the catalyst, and perform the esterification reaction; Step two: start the driving motor (9), the driving motor (9) drives the first sprocket (10) to rotate, drives the second sprocket (11) to rotate through the chain (12), so that the rotating shaft (4) drives the stirring column (5) to rotate, and the raw oil and the catalyst are stirred and mixed through the stirring rod (6) on the stirring column (5); Step three: after the catalytic reaction of the raw oil, fatty acid methyl ester and glycerol are generated; Step four: while the stirring rod (6) rotates, the fatty acid methyl ester and glycerol adhered to the inner wall of the reactor (1) are scraped off layer by layer through the scraper (16); Step six: the unreacted raw oil cannot pass through the carbon film (2), and the fatty acid methyl ester and glycerol generated by the reaction can pass through the carbon film (2); Step seven: the glycerol and the fatty acid methyl alcohol are separated through the centrifuge (36) and are stored in the biodiesel storage tank (37) and the glycerol storage tank (38) respectively.

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