A lactic acid sodium production fermentation device

Abstract

The present application relates to a lactic acid sodium production fermentation device, belonging to the technical field of lactic acid fermentation, and it includes an electrodialysis device; the electrodialysis device includes a dialysis cell, and is characterized in that: an annular flow channel is fixedly arranged in the dialysis cell, and baffles are slidably arranged on both the inner peripheral surface and the outer peripheral surface of the annular flow channel; an anion exchange membrane or a cation exchange membrane is fixedly arranged on the baffle; a plurality of cleaning chambers are arranged in the top wall of the dialysis cell; after the baffle moves upward, the ion exchange membrane can extend into the cleaning chamber; a liquid inlet pipe and a liquid outlet pipe are fixedly arranged in the cleaning chamber; a cleaning liquid is used to flow in the cleaning chamber to clean the ion exchange membrane. The annular flow channel divides the space in the dialysis cell into an inner separation pool and an outer separation pool; an anode is arranged in the inner separation pool, and a cathode is arranged in the outer separation pool; the anion exchange membrane is arranged on the inner peripheral surface of the annular flow channel; the cation exchange membrane is arranged on the outer peripheral surface of the annular flow channel. The present application has the effect of automatically cleaning a single ion exchange membrane.

Description

Technical Field

[0001] This application relates to the technical field of lactic acid fermentation, and particularly to a fermentation device for producing sodium lactate. Background Art

[0002] Sodium lactate is an important organic acid salt, which is usually produced by lactic acid fermentation, a process that uses microorganisms to convert sugars into lactic acid. The extraction of lactic acid usually relies on traditional separation and purification techniques such as centrifugation, filtration, evaporation, and ion exchange. These methods are not only time-consuming and energy-consuming, but may also not completely remove impurities in the fermentation broth, affecting the quality and application range of the product.

[0003] Electrodialysis is a process that uses ion exchange membranes to separate ions in a solution under the action of an electric field. During lactic acid fermentation, electrodialysis can be used to directly separate lactic acid from the fermentation broth, thereby improving the extraction efficiency and purity of lactic acid. An electrodialysis device usually consists of a dialysis cell, ion exchange membranes, and electrodes. In the dialysis cell, cation exchange membranes and anion exchange membranes are arranged alternately. These membranes only allow specific types of ions to pass through, thus achieving ion separation in the solution; the electrodes provide the necessary electric field for electrodialysis. A flow channel for guiding the fermentation broth and the concentrated solution to pass through is also provided in the electrodialysis device, and a liquid pump is arranged in the flow channel to control the flow and pressure of the fermentation broth, ensuring uniform distribution and flow of the solution in the device.

[0004] The ion exchange membranes need to be cleaned and maintained regularly during the electrodialysis process to improve the extraction efficiency of the fermentation broth. However, during the separation of lactic acid fermentation broth, the cleaning frequency of the anion exchange membranes is much higher than that of the cation exchange membranes; and the cleaning frequency of the ion exchange membranes at the inlet position of the lactic acid fermentation broth is even higher. The current cleaning mode of disassembling and assembling the whole machine for the ion exchange membranes in the dialysis cell cannot balance the above problems; and the disassembly and assembly of the ion exchange membranes need to be carried out manually, and the human resources invested also lead to a reduction in maintenance efficiency. Summary of the Invention

[0005] In order to improve the problem that the ion exchange membranes cannot be cleaned in a timely manner automatically, this application provides a fermentation device for producing sodium lactate.

[0006] A fermentation device for producing sodium lactate provided by this application adopts the following technical solutions:

[0007] A lactic acid sodium production fermentation device, including an electrodialysis device; the electrodialysis device includes a dialysis cell, characterized in that: an annular flow channel is fixedly arranged in the dialysis cell, baffles are slidably arranged on the inner peripheral surface and the outer peripheral surface of the annular flow channel; anion exchange membranes or cation exchange membranes are fixedly arranged on the baffles; a plurality of cleaning chambers are arranged in the top wall of the dialysis cell; after the baffle moves upward, the ion exchange membrane can extend into the cleaning chamber; a liquid inlet pipe and a liquid outlet pipe are fixedly arranged in the cleaning chamber; cleaning liquid is used to flow in the cleaning chamber to clean the ion exchange membrane.

[0008] Optionally, the annular flow channel divides the space in the dialysis cell into an inner separation pool and an outer separation pool; an anode is arranged in the inner separation pool, and a cathode is arranged in the outer separation pool; the anion exchange membrane is arranged on the inner peripheral surface of the annular flow channel; the cation exchange membrane is arranged on the outer peripheral surface of the annular flow channel.

[0009] Optionally, a plurality of card slots are respectively arranged on the inner peripheral surface and the outer peripheral surface of the annular flow channel, and the baffle is slidably arranged in the card slots in the vertical direction; limiting slots are respectively arranged on two opposite inner walls of the card slots, and the side walls on both sides of the baffle are respectively slidably arranged in the limiting slots.

[0010] Optionally, a plurality of arc-shaped grooves I are arranged on the bottom wall of the dialysis cell, and the bottom end of the baffle is slidably arranged in the arc-shaped grooves I; a plurality of tension springs I are fixedly arranged on the bottom surface of the arc-shaped grooves I, and one end of the tension spring is fixedly connected with the bottom surface of the baffle for driving the baffle to move downward; liquid leakage holes are arranged on the bottom surface of the arc-shaped grooves I.

[0011] Optionally, an arc-shaped groove II is arranged on the bottom surface of the cleaning chamber, and the top end of the baffle is slidably arranged in the arc-shaped groove II; a magnetic ring is fixedly arranged on the top surface of the cleaning chamber, and the magnetic ring is an electromagnet; a metal sheet that can be magnetically adsorbed with the magnetic ring is fixedly arranged on the top surface of the baffle.

[0012] Optionally, a liquid inlet pump and a liquid inlet valve are fixedly arranged on the liquid inlet pipe, and the liquid inlet pump and the liquid inlet valve are connected in series; a chute is arranged on the top surface of the cleaning chamber, and a slider is slidably arranged in the chute; a switch moving piece I is fixedly arranged on the top surface of the slider, and a switch fixed piece I that can be in electrical contact with the switch moving piece I is fixedly arranged on the top wall of the chute; the switch moving piece I is electrically connected with the liquid inlet pump or the liquid inlet valve, and the switch fixed piece I is electrically connected with a power supply.

[0013] Optionally, a reset spring is fixedly arranged in the chute, and the end of the reset spring is fixedly connected with the slider for driving the slider to reset downward.

[0014] Optionally, a communication groove is formed in the bottom wall of the cleaning chamber, and a liquid sealing plate is slidably arranged in the communication groove along the radial direction of the dialysis cell; a strip-shaped through hole is formed in the baffle plate, and the liquid sealing plate can penetrate through the strip-shaped through hole.

[0015] Optionally, a second tension spring is fixedly arranged on the inner wall of the communication groove, and the second tension spring is fixedly connected with the liquid sealing plate and used for driving the liquid sealing plate to reset in a direction away from the baffle plate.

[0016] In summary, the present application includes at least one of the following beneficial technical effects:

[0017] 1. Based on the purpose of creating an automated cleaning of ion exchange membranes, the present application sets up resistance measurement to control a single ion exchange membrane, so as to automatically trigger a cleaning operation when impurities accumulate on the surface of the ion exchange membrane to a certain extent;

[0018] 2. At the same time, the ion exchange membranes are disassembled, and a partition plate is arranged below each single ion exchange membrane, so that the cleaning of a single ion exchange membrane will not affect the entire electrodialysis operation;

[0019] 3. To achieve the above purpose, the cleaning chamber of the ion exchange membrane in the present application is arranged above the dialysis cell, and by controlling the flowing time of the cleaning agent and setting a liquid sealing plate, etc., the cleaning agent is prevented from flowing into the dialysis cell. Description of the Drawings

[0020] Figure 1 is a cross-sectional view of the dialysis cell according to an embodiment of the present application.

[0021] Figure 2 is a schematic structural view of the annular flow channel according to an embodiment of the present application.

[0022] Figure 3 is a cross-sectional view of the cleaning chamber according to an embodiment of the present application.

[0023] Figure 4 is a schematic structural view of the baffle plate according to an embodiment of the present application.

[0024] Reference numerals: 1, dialysis cell; 11, inner separation cell; 12, outer separation cell; 13, partition plate; 14, desalination chamber; 15, concentration chamber; 2, annular flow channel; 21, anion exchange membrane; 22, cation exchange membrane; 23, card slot; 3, baffle plate; 31, square through hole; 32, limiting groove; 33, first arc-shaped groove; 34, first tension spring; 35, first switch moving piece; 4, cleaning chamber; 41, second arc-shaped groove; 42, slider; 43, reset spring; 44, magnetic ring; 5, liquid sealing plate; 51, communication groove; 52, strip-shaped through hole; 53, second tension spring. Detailed Embodiments

[0025] The following is combined with the attached Figures 1-4A further detailed description of the present application is provided.

[0026] An embodiment of the present application discloses a lactic acid sodium production fermentation device. Refer to Figure 1 , the lactic acid sodium production fermentation device includes an electrodialysis device for separating lactic acid from the lactic acid fermentation broth. The electrodialysis device includes a dialysis cell 1 in the shape of a disc and an electrolyte located inside the dialysis cell 1. An annular flow channel 2 is fixedly arranged inside the dialysis cell 1 for the lactic acid fermentation broth to flow. A number of liquid outlet pumps are arranged inside the annular flow channel 2. Preferably, a number of liquid outlet pumps are evenly distributed inside the annular flow channel 2.

[0027] Refer to Figure 1 and Figure 2 , the annular flow channel 2 divides the space inside the dialysis cell 1 into an inner separation cell 11 and an outer separation cell 12. An anode is arranged inside the inner separation cell 11, and a cathode is arranged inside the outer separation cell 12. An anion exchange membrane 21 is arranged on the inner peripheral surface of the annular flow channel 2, and a cation exchange membrane 22 is arranged on the outer peripheral surface; the lactate ions in the fermentation broth pass through the anion exchange membrane 21 under the action of the anode and enter the inner separation cell 11; cations such as Na+, K+, and H+ pass through the cation exchange membrane 22 and enter the outer separation cell 12.

[0028] Specifically, a number of partition plates 13 are fixedly arranged inside both the outer separation cell 12 and the inner separation cell 11. The partition plates 13 divide the space inside the outer separation cell 12 into a number of desalination chambers 14, and the partition plates 13 divide the space inside the inner separation cell 11 into a number of concentration chambers 15. An outflow pipeline is arranged inside each desalination chamber 14 and concentration chamber 15. A cathode pole column is fixedly arranged inside the desalination chamber 14, and an anode pole column is fixedly arranged inside the concentration chamber 15.

[0029] Refer to Figure 2 , a number of clamping grooves 23 are respectively formed on the inner peripheral surface and the outer peripheral surface of the annular flow channel 2. The clamping grooves 23 penetrate through the outer wall of the annular flow channel 2 to communicate the inner cavity of the annular flow channel 2 with the clamping grooves 23. A baffle 3 is slidably arranged vertically inside the clamping grooves 23; the baffle 3 is slidably arranged vertically inside the clamping grooves 23; a square through hole 31 is formed on the baffle 3, and the ion exchange membrane is embedded inside the square through hole 31. Specifically, an anion exchange membrane 21 is fixedly arranged on the baffle 3 on the inner peripheral surface of the annular flow channel 2, and a cation exchange membrane 22 is fixedly arranged on the baffle 3 on the outer peripheral surface of the annular flow channel 2.

[0030] Specifically, the clamping grooves 23 are formed through the side wall of the annular flow channel 2 in the thickness direction of the annular flow channel 2. Limiting grooves 32 are respectively formed on two opposite inner walls of the clamping grooves 23. The side walls on both sides of the baffle 3 are respectively slidably arranged inside the limiting grooves 32 and are attached to the inner walls of the limiting grooves 32 to prevent liquid from seeping in.

[0031] Specifically, the height of the baffle 3 is higher than the thickness of the annular flow channel 2, and the width of the ion exchange membrane is comparable to the thickness of the annular flow channel 2. When the baffle 3 moves downward, the ion exchange membrane is located at the outer wall position of the annular flow channel 2, and ions in the fermentation broth in the annular flow channel 2 can enter the inner separation pool 11 or the outer separation pool 12 through the ion exchange membrane; when the baffle 3 moves upward, the ion exchange membrane is located above the annular flow channel 2; the fermentation broth in the annular flow channel 2 is blocked by the baffle 3 and cannot perform ion exchange with the electrolyte in the exchange pool.

[0032] Referring to Figure 1 and Figure 2 , a plurality of arc-shaped grooves 33 are formed in the bottom wall of the dialysis cell 1. The arc-shaped grooves 33 are located below the baffle 3, and the bottom end of the baffle 3 is slidably arranged in the arc-shaped grooves 33. A plurality of tension springs 34 are fixedly arranged on the bottom surface of the arc-shaped grooves 33, and the ends of the tension springs 34 are fixedly connected to the bottom surface of the baffle 3 for driving the baffle 3 to move downward. A liquid leakage hole is formed in the bottom surface of the arc-shaped grooves 33 for discharging the electrolyte overflowing into the arc-shaped grooves 33.

[0033] Referring to Figure 3 and Figure 4 , a plurality of cleaning chambers 4 are arranged inside the top wall of the dialysis cell 1. Specifically, the plurality of cleaning chambers 4 surround to form a circular inner ring chamber and an outer ring chamber. The inner ring chamber is located above the baffle 3 on the inner peripheral surface of the annular flow channel 2, and the outer ring chamber is located above the baffle 3 on the outer peripheral surface of the annular flow channel 2. An arc-shaped groove 41 is formed in the bottom surface of the cleaning chamber 4, and the top end of the baffle 3 is slidably arranged in the arc-shaped groove 41. After the baffle 3 moves upward, the ion exchange membrane extends into the cleaning chamber 4. A circular magnetic ring 44 is fixedly arranged on the top surface of the cleaning chamber 4. The magnetic ring 44 is an electromagnet; a metal sheet that can be magnetically adsorbed to the magnetic ring 44 is fixedly arranged on the top surface of the baffle 3.

[0034] Specifically, a liquid inlet is formed in the top surface of the cleaning chamber 4, and a liquid inlet pipe is fixedly arranged in the liquid inlet. A liquid outlet is formed in the bottom surface of the cleaning chamber 4, and a liquid outlet pipe is fixedly arranged in the liquid outlet. The liquid outlet pipe is buried in the bottom wall of the cleaning chamber 4. A liquid inlet pump and a liquid inlet valve are fixedly arranged on the liquid inlet pipe; the liquid inlet pump and the liquid inlet valve are connected in series. When the switch on the connection circuit of the liquid inlet pump and the liquid inlet valve is closed, the liquid inlet pump and the liquid inlet valve are opened respectively. The liquid inlet and the liquid outlet are respectively located on both sides of the arc-shaped groove 41.

[0035] Specifically, a cleaning liquid flows in the cleaning chamber 4 to clean the ion exchange membrane. A sodium hydroxide solution flows in the inner ring chamber to clean the anion exchange membrane 21, and a dilute hydrochloric acid solution flows in the outer ring chamber to clean the cation exchange membrane 22.

[0036] Referring to Figure 4A slide groove is provided on the top surface of the cleaning chamber 4, and a slider 42 is slidably arranged in the slide groove; the slide groove is located at the top of the magnetic ring 44, and the slider 42 is slidably connected to the inner circumference of the magnetic ring 44. A reset spring 43 is fixed in the slide groove, and the end of the reset spring 43 is fixed to the slider 42, which is used to drive the slider 42 to reset downward. A guide piece is fixed on the side wall of the slider 42, and a guide groove is provided on the side wall of the slide groove to slide with the guide piece to prevent the slider 42 from leaving the slide groove. A switch movable piece 35 is fixed on the top surface of the slider 42, and a switch stator 1 that can be in electrical contact with the switch movable piece 35 is fixed on the top wall of the slide groove. The switch movable piece 35 is electrically connected to the liquid inlet pump or the liquid inlet valve, and the switch stator 1 is electrically connected to the power supply.

[0037] Specifically, the baffle 3 can abut against the slider 42 after moving upward. When the baffle 3 is separated from the slider 42, the return spring 43 is in a natural expansion state, the switch moving piece 1 35 is separated from the switch fixed piece 1, and the liquid inlet pump and the liquid inlet valve are both in a closed state. After the baffle 3 moves upward and abuts against the slider 42, the slider 42 moves upward under pressure, the switch moving piece 1 35 contacts the switch fixed piece 1, the liquid inlet pump and the liquid inlet valve are opened, and liquid is injected into the cleaning chamber 4.

[0038] Reference Figure 3 and Figure 4 A connecting groove 51 is provided in the bottom wall of the cleaning chamber 4, and a sealing plate 5 is provided in the connecting groove 51 to slide radially along the dialysis tank 1. A strip through hole 52 is provided on the baffle plate 3 below the ion exchange membrane, and the sealing plate 5 can penetrate the strip through hole 52 after the ion exchange membrane enters the cleaning chamber 4. It should be noted that the strip through hole 52 is thicker than the sealing plate 5, so that after the baffle plate 3 is separated from the magnetic ring 44, the baffle plate 3 can move downward for a short distance under the action of its own gravity and the pulling force of the tension spring 34, so that the slider 42 can be reset downward.

[0039] Specifically, since the liquid in the cleaning chamber 4 will flow into the gap between the baffle plate 3 and the arc groove 2 41 during the flow process, even if the hydrophobic film is attached to the side wall of the arc groove 2 41, it cannot completely prevent the above situation; and the liquid in the cleaning chamber 4 will contaminate the lactic acid recovery liquid. After the sealing plate 5 penetrates the baffle plate 3, the liquid will flow to the top surface of the sealing plate 5; at the same time, a leakage pipe connected to the liquid outlet pipe is fixed on the bottom surface of the connecting groove 51. The top surface of the sealing plate 5 is set as an inclined surface inclined toward the leakage pipe, so that the liquid on the sealing plate 5 can enter the leakage pipe.

[0040] Reference Figure 3 and Figure 4, a second tension spring 53 is fixedly arranged on the inner wall of the connecting groove 51. The second tension spring 53 is fixedly connected to the liquid sealing plate 5 and is used to drive the liquid sealing plate 5 to reset in a direction away from the baffle 3. Preferably, the liquid leakage pipe is fixedly arranged on the bottom surface of the connecting groove 51 in the direction close to the second tension spring 53. A magnetic block is fixedly arranged on the inner wall of the connecting groove 51. The magnetic block is an electromagnet; a metal sheet that can be adsorbed by the magnetic block is fixedly arranged on the side wall of the liquid sealing plate 5 away from the second tension spring 53. The magnetic block drives the liquid sealing plate 5 to move towards the baffle 3 by adsorbing the metal sheet.

[0041] Specifically, the magnetic block is connected in parallel with the liquid inlet pump and the liquid inlet valve. That is, after the moving contact piece 35 of the switch is in electrical contact with the fixed contact piece 1 of the switch, the magnetic block is turned on and attracts the liquid sealing plate 5 to move. A first timer and a first relay are connected to the liquid inlet pump and the liquid inlet valve. The output end of the first timer is connected to the coil of the first relay. Both the liquid inlet pump and the liquid inlet valve are connected to the normally open contact of the first relay. After the moving contact piece 35 of the switch is in electrical contact with the fixed contact piece 1 of the switch, the first timer starts timing. After the first timer finishes timing, it outputs a low level to the first relay, and the first relay controls the liquid inlet pump and the liquid inlet valve to close. It should be noted that the liquid inlet valve is an electromagnetic valve; the liquid inlet valve opens after being powered on.

[0042] Specifically, the control circuit of the magnetic ring 44 includes a first control circuit provided with a second relay and a comparator and a second control circuit provided with a third relay and a second timer. A single-pole double-throw switch is provided between the first control circuit and the second control circuit. In the first control switch, the output end of the comparator is connected to the coil of the second relay. The two input ends of the comparator are respectively connected to the ion exchange membrane and the reference voltage. When the circuit is conducting, the comparator will detect the voltage change applied to the ion exchange membrane. When the voltage of the ion exchange membrane is less than the reference voltage, the surface resistance of the ion exchange membrane increases and exceeds the threshold value, and the comparator applies a low level to the second relay. The magnetic ring 44 is connected to the normally closed contact of the second relay. After the second relay receives the low level, it controls the magnetic ring 44 to open.

[0043] Specifically, the second control circuit includes a timer connected in parallel with the comparator. The output end of the timer is connected to the third relay. The magnetic ring 44 is connected to the normally open contact of the third relay. When the single-pole double-throw switch turns to the direction of the second timer, the second timer starts timing. At this time, the magnetic ring 44 is in the powered-on state. After the second timer finishes timing, it outputs a low level to the third relay, and the third relay controls the magnetic ring 44 to close.

[0044] Specifically, the single-pole double-throw switch is arranged on the bottom surface of the top wall of the dialysis cell 1 and is located above the card slot 23. The single-pole double-throw switch includes a switch slot and a switch piece slidably arranged vertically in the switch slot. A compression spring is fixedly arranged in the switch slot. The compression spring is fixedly connected to the switch piece and is used to push the switch piece to move downward. A moving contact piece 2 of the switch is fixedly arranged on the side wall of the switch piece, and two fixed contact pieces 2 are fixedly arranged on the inner wall of the switch slot; the moving contact piece 2 of the switch is electrically connected to the power supply, and the two fixed contact pieces 2 are respectively electrically connected to the timer and the comparator.

[0045] Specifically, when the compression spring is in the natural expansion and contraction state, the comparator is in the electrical conduction state; after the comparator detects that the resistance value of the ion exchange membrane exceeds the resistance threshold, it controls the magnetic ring 44 to turn on. The magnetic ring 44 exerts a magnetic attraction on the baffle 3 and drives the baffle 3 to rise. After the baffle 3 rises to the top surface of the card slot 23, it pushes the switch piece to move; thus, the comparator is disconnected, and the timer is in the electrical conduction state. After the timer finishes timing, it controls the electromagnetic ring 44 to turn off. The baffle 3 that has lost the magnetic attraction effect resets downward under its own gravity and the action of the tension spring 34. The timer circuit is disconnected, and the comparator circuit is closed; at this time, since the resistance value of the ion exchange membrane on the baffle 3 decreases after being cleaned, the magnetic ring 44 remains in the off state.

[0046] The above are all the preferred embodiments of this application. The protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A lactic acid sodium production fermentation device, including an electrodialysis device; the electrodialysis device includes a dialysis cell (1), characterized in that: An annular flow channel (2) is fixedly arranged inside the dialysis cell (1), and baffles (3) are slidably arranged on both the inner peripheral surface and the outer peripheral surface of the annular flow channel (2); an anion exchange membrane (21) or a cation exchange membrane (22) is fixedly arranged on the baffle (3); a plurality of cleaning chambers (4) are arranged inside the top wall of the dialysis cell (1); after the baffle (3) moves upward, the ion exchange membrane can extend into the cleaning chamber (4); a liquid inlet pipe and a liquid outlet pipe are fixedly arranged inside the cleaning chamber (4); a cleaning liquid is used to flow inside the cleaning chamber (4) to clean the ion exchange membrane. An arc-shaped groove two (41) is formed in the bottom surface of the cleaning chamber (4), and the top end of the baffle (3) is slidably arranged inside the arc-shaped groove two (41); a magnetic ring (44) is fixedly arranged on the top surface of the cleaning chamber (4), and the magnetic ring (44) is an electromagnet; a metal sheet capable of being magnetically adsorbed to the magnetic ring (44) is fixedly arranged on the top surface of the baffle (3). A communication groove (51) is formed in the bottom wall of the cleaning chamber (4), and a liquid sealing plate (5) is slidably arranged along the radial direction of the dialysis cell (1) inside the communication groove (51); a strip-shaped through hole (52) is formed in the baffle (3), and the liquid sealing plate (5) can penetrate through the strip-shaped through hole (52). A second tension spring (53) is fixedly arranged on the inner wall of the communication groove (51), and the second tension spring (53) is fixedly connected to the liquid sealing plate (5) and is used to drive the liquid sealing plate (5) to reset in a direction away from the baffle (3).

2. The lactic acid sodium production fermentation device according to claim 1, characterized in that: The annular flow channel (2) divides the space inside the dialysis cell (1) into an inner separation cell (11) and an outer separation cell (12); an anode is arranged inside the inner separation cell (11), and a cathode is arranged inside the outer separation cell (12); the anion exchange membrane (21) is arranged on the inner peripheral surface of the annular flow channel (2); the cation exchange membrane (22) is arranged on the outer peripheral surface of the annular flow channel (2).

3. The lactic acid sodium production fermentation device according to claim 1, wherein: A plurality of clamping grooves (23) are respectively formed in the inner peripheral surface and the outer peripheral surface of the annular flow channel (2), and the baffle (3) is slidably arranged vertically inside the clamping grooves (23); limiting grooves (32) are respectively formed in two opposite inner walls of the clamping grooves (23), and the side walls on both sides of the baffle (3) are respectively slidably arranged inside the limiting grooves (32).

4. A lactic acid sodium production fermentation device according to claim 1, characterized in that: A plurality of arc-shaped grooves one (33) are formed in the bottom wall of the dialysis cell (1), and the bottom end of the baffle (3) is slidably arranged inside the arc-shaped grooves one (33); a plurality of first tension springs (34) are fixedly arranged on the bottom surface of the arc-shaped grooves one (33), and the ends of the first tension springs (34) are fixedly connected to the bottom surface of the baffle (3) and are used to drive the baffle (3) to move downward; leakage holes are formed in the bottom surface of the arc-shaped grooves one (33).

5. A lactic acid sodium production fermentation device according to claim 1, characterized in that: An inlet liquid pump and an inlet liquid valve are fixedly arranged on the inlet liquid pipe, and the inlet liquid pump and the inlet liquid valve are connected in series; a sliding groove is formed in the top surface of the cleaning chamber (4), and a sliding block (42) is slidably arranged in the sliding groove; a first switch moving piece (35) is fixedly arranged on the top surface of the sliding block (42), and a first switch fixed piece capable of being in electrical contact with the first switch moving piece (35) is fixedly arranged on the top wall of the sliding groove; the first switch moving piece (35) is electrically connected to the inlet liquid pump or the inlet liquid valve, and the first switch fixed piece is electrically connected to a power supply.

6. The lactic acid sodium production fermentation device according to claim 5, characterized in that: A return spring (43) is fixedly arranged in the sliding groove, and the end of the return spring (43) is fixedly connected to the sliding block (42) for driving the sliding block (42) to reset downward.

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