Forward osmosis concentration device for fermentation liquor

Abstract

The utility model discloses a forward osmosis concentration device for fermentation liquor, which relates to the technical field of fermentation product extraction and comprises a box body, a feeding solution cavity and a concentration cavity are arranged in an inner cavity of the box body, a forward osmosis membrane is arranged between the feeding solution cavity and the concentration cavity, and a fixing plate is arranged on the forward osmosis membrane in the direction close to the feeding solution cavity. The two sides of an inner cavity of the box body are connected with fixing plates, and a protection structure is arranged between the two fixing plates in a clamped mode. The feed solution cavity and the concentration cavity are arranged, and the forward osmosis membrane is arranged between the feed solution cavity and the concentration cavity, so that fermentation liquor in the box body is subjected to acting force of osmotic pressure difference on two sides, and the effect of concentrating the feed solution is realized through the forward osmosis membrane; by arranging the protective structure, the filter screen of the protective structure can filter and protect impurities and bacteria in the fermentation liquid to prevent the impurities and bacteria from being in contact with the forward osmosis membrane to cause pollution and damage, so that the concentration efficiency and purity of the forward osmosis membrane are improved, and the service life of the concentration device is prolonged at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of fermentation product extraction, and particularly relates to a forward osmosis concentration device for fermentation broth. Background Art

[0002] The concentration of fermentation broth is mainly divided into two categories: membrane concentration and thermal concentration. The thermal concentration process often consumes a large amount of energy and is not suitable for temperature-sensitive products. And low-temperature concentration has significant energy consumption and is difficult to be applied in commercial production. In contrast, the membrane concentration process is relatively environmentally friendly. In the membrane process, microfiltration and ultrafiltration are widely used, which have the advantage of relatively low working pressure. Ultrafiltration and microfiltration are respectively applicable to samples with the particle size of concentrated substances greater than 0.01μm and 1μm, and can effectively concentrate organic macromolecules (such as proteins, carbohydrates).

[0003] In the prior art, the membrane concentration of fermentation broth is generally carried out by reverse osmosis. For example, an extraction and concentration device for one-step ultrafiltration of erythritol fermentation broth with the publication number of CN215162257U belongs to the technical field of fermentation product extraction. It includes: an ultrafiltration membrane for filtering and removing impurities from the erythritol fermentation broth; a nanofiltration membrane connected to the permeate side of the ultrafiltration membrane for filtering and removing impurities from the filtrate of the ultrafiltration membrane; and a reverse osmosis membrane connected to the permeate side of the nanofiltration membrane for concentrating the filtrate of the nanofiltration membrane.

[0004] High-pressure membrane processes such as reverse osmosis retain small-molecule organic substances and ionic compounds. However, reverse osmosis requires a large working pressure, and due to hydraulic limitations, a high concentration level cannot be achieved. In addition, reverse osmosis is prone to fouling problems. At the same time, the impurities and bacteria in the fermentation broth will contact the osmosis membrane, resulting in membrane fouling and damage, reducing its service life and affecting the concentration efficiency and purity of the fermentation broth. In contrast, forward osmosis relies on the osmotic pressure difference as the driving force between two liquids, enabling water to permeate from low osmotic pressure (feed solution) to high osmotic pressure (draw solution), achieving the effect of concentrating the feed liquid. Forward osmosis combines high rejection rate and low fouling characteristics and can operate without obvious pressure or temperature gradients, effectively solving the problems existing in the above other concentration processes. However, the forward osmosis membrane is also prone to membrane fouling problems. How to effectively avoid membrane fouling is an urgent problem to be solved in forward osmosis technology. Summary of the Invention

[0005] The purpose of the utility model is to solve the problems that reverse osmosis requires high pressure and is prone to fouling, and the osmosis membrane contacts bacteria and impurities in the fermentation broth to cause pollution in the above background art, and to propose a forward osmosis concentration device for fermentation broth.

[0006] The purpose of the utility model can be achieved by the following technical solutions:

[0007] An osmotic concentration device for fermentation broth, comprising a box body. An inlet solution chamber and a concentration chamber are arranged in the inner cavity of the box body. An osmotic membrane is arranged between the inlet solution chamber and the concentration chamber. A fixing plate is arranged in the direction close to the inlet solution chamber of the osmotic membrane. The two sides of the inner cavity of the box body are connected to the fixing plate. A protective structure is detachably arranged between the two fixing plates. The protective structure includes:

[0008] A mounting plate, the two sides of which are clamped with the fixing plate. A trapezoidal slot is arranged inside the mounting plate. A filter plate is detachably arranged in the slot. A filter screen is arranged inside the filter plate;

[0009] Two connecting plates are arranged on the side of the mounting plate away from the concentration chamber. A clamping member is slidably arranged inside the connecting plate. The clamping member is in contact with the surface of the filter plate. A threaded rod is rotatably arranged inside the clamping member. The threaded rod is threadedly connected to the connecting plate. One end of the threaded rod passes through the connecting plate.

[0010] As a further scheme of the utility model: clamping grooves are arranged on the surfaces of the two fixing plates. The clamping grooves are arranged along the vertical direction. The shape of the clamping grooves is adapted to the shape of the side surface of the mounting plate.

[0011] As a further scheme of the utility model: fixing grooves are arranged on the surface of the fixing plate. The shape of the fixing grooves is adapted to the shape of the clamping member.

[0012] As a further scheme of the utility model: a screwing handle is arranged at one end of the threaded rod extending out of the connecting plate.

[0013] As a further scheme of the utility model: a sealing cover is detachably arranged on the top surface of the box body.

[0014] As a further scheme of the utility model: communicating pipes are arranged on both sides of the surface of the box body. The two communicating pipes are respectively communicated with the inlet solution chamber and the concentration chamber.

[0015] As a further scheme of the utility model: a water pump is arranged on the surface of the communicating pipe.

[0016] The beneficial effects of the utility model:

[0017] (1) An osmotic concentration device for fermentation broth. By arranging an inlet solution chamber and a concentration chamber, and an osmotic membrane is arranged between the inlet solution chamber and the concentration chamber, the fermentation broth inside the box body is subjected to the acting force of the osmotic pressure difference on both sides, and the effect of concentrating the feed liquid is realized through the osmotic membrane. Due to the high selectivity of osmosis, most compounds cannot enter the suction solution through the selective permeable membrane; at the same time, there is no need for a pressure vessel and a high-pressure pump, and there is no need for a temperature gradient, avoiding the degradation of the products in the feed solution;

[0018] (2) A forward osmosis concentration device for fermentation broth, by setting a protective structure, a filter screen is arranged on the side of the forward osmosis membrane close to the feed solution chamber. The filter screen can filter and protect impurities and bacteria inside the fermentation broth, preventing them from contacting the forward osmosis membrane and causing pollution and damage, thereby improving the concentration efficiency and purity of the forward osmosis membrane, and at the same time extending the service life of the concentration device;

[0019] (3) A forward osmosis concentration device for fermentation broth, by setting a connecting plate and a clamping member, rotating and screwing the handle drives the clamping member to move, so that the clamping member moves to the fixing groove to complete the fixation of the protective structure. At the same time, the clamping member presses and fixes the detachable filter plate on the mounting plate; after removing the mounting plate, the reverse movement of the clamping member cancels the pressing on the dismounting plate, facilitating the cleaning and replacement of the filter screen. Description of the Drawings

[0020] The following further describes the present utility model with reference to the drawings.

[0021] Figure 1 is a schematic diagram of the internal structure of a forward osmosis concentration device for fermentation broth of the present utility model;

[0022] Figure 2 is a schematic diagram of the top view structure inside a forward osmosis concentration device for fermentation broth of the present utility model;

[0023] Figure 3 is a schematic diagram of the structure of the protective structure of the present utility model;

[0024] Figure 4 is the present utility model Figure 3 is a partial enlarged view of part A in;

[0025] Figure 5 is a schematic diagram of the structure of the filter plate of the present utility model;

[0026] Figure 6 is a schematic diagram of the side view structure of the fixing plate of the present utility model.

[0027] In the figure: 1, box body; 2, feed solution chamber; 3, concentration chamber; 4, sealing cover; 5, connecting plate; 6, forward osmosis membrane; 7, fixing plate; 71, clamping groove; 72, fixing groove; 8, protective structure; 81, mounting plate; 82, connecting plate; 83, clamping member; 84, filter plate; 85, filter screen; 86, threaded rod; 87, screwing handle; 9, connecting pipe; 10, water pump. Detailed Embodiments

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present utility model.

[0029] Please refer to Figure 1-6 As shown, the present utility model is a forward osmosis concentration device for fermentation broth, including a box body 1. An inner cavity is provided inside the box body 1, and the two sides of the inner cavity are divided into a feed solution chamber 2 and a concentration chamber 3. A connecting plate 82 is arranged between the feed solution chamber 2 and the concentration chamber 3, and the connecting plate 82 is arranged along the vertical direction. The connecting plate 82 is fixedly connected to the inner wall of the box body 1, and a forward osmosis membrane 6 is arranged inside the connecting plate 82. The inner cavity of the box body 1 extends to the top surface of the box body 1, and a sealing cover 4 is detachably arranged on the top surface of the box body 1. Fixing plates 7 are arranged on both sides of the inner cavity of the box body 1, and the two fixing plates 7 are arranged along the vertical direction. The two fixing plates 7 are located in the direction of the feed solution chamber 2 close to the connecting plate 82, and the two fixing plates 7 are located in the same vertical plane. The fixing plates 7 are fixedly connected to the inner cavity of the box body 1, and vertical engaging grooves 71 are arranged on the exposed surfaces of the two fixing plates 7. Fixing grooves 72 are formed on the surfaces of the fixing plates 7, and the fixing grooves 72 are located on the side of the engaging grooves 71 away from the connecting plate 82. The positions and shapes of the engaging grooves 71 and the fixing grooves 72 of the two fixing plates 7 are symmetrically arranged with respect to the central plane of the box body 1.

[0030] A protective structure 8 is detachably arranged between the two fixing plates 7. The shape of the mounting plate 81 of the protective structure 8 is adapted to the shape of the engaging groove 71, and it is slidably arranged between the two fixing plates 7 through the engaging groove 71. Two connecting plates 82 are fixedly arranged on both sides of the side of the mounting plate 81 away from the connecting plate 82, and the two connecting plates 82 are arranged along the vertical direction. A engaging member 83 is slidably arranged on the side of the connecting plate 82 close to the inner wall of the box body 1. The shape of the engaging member 83 is similar to a "C" shape, and the horizontal sections on the upper and lower sides of the engaging member 83 are slidably arranged with the connecting plate 82. A threaded rod 86 is threadedly connected to the central position of the connecting plate 82. The threaded rod 86 is arranged along the horizontal direction, one end of the threaded rod 86 extends into the inside of the engaging member 83 and is rotatably engaged, and a screwing handle 87 is arranged at the other end of the threaded rod 86. A trapezoidal slot is arranged at the central position of the mounting plate 81. Along the direction close to the feed solution chamber 2, both the length and width of the trapezoidal slot gradually increase. A filter plate 84 is detachably arranged in the trapezoidal slot of the mounting plate 81. The shape of the filter plate 84 is adapted to the shape of the trapezoidal slot, and a filter net 85 is arranged inside the filter plate 84. Connecting pipes 9 are arranged on both sides of the surface of the box body 1, and the two connecting pipes 9 are respectively communicated with the feed solution chamber 2 and the concentration chamber 3. A water pump 10 is arranged on the surface of the connecting pipe 9.

[0031] When using this forward osmosis concentration device for fermentation broth, the mounting plate 81 of the protective structure 8 is engaged through the clamping grooves 71 on both sides. Subsequently, the screwing handle 87 is rotated to drive the rotation of the threaded rod 86, causing the engaging member 83 to move under the action of the thread force. One side of the engaging member 83 extends into the fixing groove 72 of the fixing plate 7 for clamping and fixing. Then, the sealing cover 4 is covered for sealing. The water pump 10 drives the fermentation broth into the feed solution chamber 2. There is an osmotic pressure difference between the liquid in the feed solution chamber 2 and the concentration chamber 3 inside the box body 1. The osmotic pressure difference acts as the driving force between the two liquids, causing the fermentation broth to permeate from the low-permeability feed solution chamber 2 through the forward osmosis membrane 6 into the high-permeability concentration chamber 3, achieving the effect of concentrating the feed liquid. During the osmosis process, there are impurities inside the fermentation broth. The fermentation broth passes through the filter screen 85 to filter the internal impurities, preventing the impurities inside the fermentation broth from contacting the forward osmosis membrane 6 and contaminating and damaging it. The filter screen 85 can be cleaned and replaced by removing the mounting plate 81. The sealing cover 4 on the top surface of the box body 1 is opened to expose the protective structure 8 inside the cavity. By rotating the screwing handle 87 to drive the rotation of the threaded rod 86, the fixing member is disengaged from the fixing groove 72, and the mounting plate 81 is pulled out from the fixing plates 7 on both sides. After pulling out, the screwing handle is rotated again to drive the engaging member 83 to move in the reverse direction, causing the engaging member 83 to move away from the center. The upper and lower horizontal sections of the engaging member 83 are separated from the surface of the filter plate 84. The filter plate 84 is separated from the surface of the mounting plate 81, and the filter plate 84 and the filter screen 85 are cleaned or replaced. While the engaging member 83 is fixed to the fixing groove 72, the filter plate 84 in the trapezoidal slot is pressed and fixed. The setting of the trapezoidal slot can cooperate with the pressing direction of the engaging member 83 to complete the fixing of the filter screen 85.

[0032] Working principle of the present utility model: A forward osmosis concentration device for fermentation broth. By providing a feed solution chamber 2 and a concentration chamber 3, and a forward osmosis membrane 6 is arranged between the feed solution chamber 2 and the concentration chamber 3. The fermentation broth inside the box body 1 is subjected to the acting force of the osmotic pressure difference on both sides, and the effect of concentrating the feed liquid is achieved through the forward osmosis membrane 6. Due to the high selectivity of forward osmosis, the vast majority of compounds cannot pass through the selective permeation membrane and enter the suction solution; at the same time, there is no need for a pressure vessel and a high-pressure pump, and no temperature gradient is required, avoiding the degradation of the products in the feed solution; by providing a protection structure 8, the protection structure 8 is provided with a filter screen 85 on the side of the forward osmosis membrane 6 close to the feed solution chamber 2. The filter screen 85 can filter and protect the impurities and bacteria inside the fermentation broth, preventing them from contacting the forward osmosis membrane 6 and causing pollution and damage, thereby improving the concentration efficiency and purity of the forward osmosis membrane 6, and at the same time prolonging the service life of the concentration device; by providing a connecting plate 82 and a clamping member 83, by rotating and screwing the handle 87 to drive the clamping member 83 to move, the clamping member 83 is moved to the fixing groove 72 to complete the fixation of the protection structure 8. At the same time, the clamping member 83 presses and fixes the detachable filter plate 84 on the mounting plate 81; after removing the mounting plate 81, the clamping member 83 moves in the reverse direction to cancel the pressing on the disassembly plate, facilitating the cleaning and replacement of the filter screen 85.

[0033] The above has described in detail one embodiment of the present utility model, but the content described is only the preferred embodiment of the present utility model and cannot be considered as limiting the scope of implementation of the present utility model. All equivalent changes and improvements made according to the scope of the application of the present utility model should still fall within the scope covered by the patent of the present utility model.

Claims

1. A forward osmosis concentration device for fermentation broth, characterized in that: The invention comprises a box body (1), wherein the inner cavity of the box body (1) is provided with a feed solution cavity (2) and a concentration cavity (3), a forward osmosis membrane (6) is provided between the feed solution cavity (2) and the concentration cavity (3), a fixing plate (7) is provided on the forward osmosis membrane (6) in a direction close to the feed solution cavity (2), the fixing plates (7) are connected to both sides of the inner cavity of the box body (1), and a protective structure (8) is provided between the two fixing plates (7) so as to be engageable, and the protective structure (8) comprises: A mounting plate (81) is engaged with the fixing plate (7) on both sides thereof, a trapezoidal slot is provided inside the mounting plate (81), a filter plate (84) is detachably provided in the slot, and a filter screen (85) is provided in the filter plate (84); Two connecting plates (82) are arranged on a side of the mounting plate (81) away from the concentration chamber (3). A clamping piece (83) is slidably arranged in the connecting plate (82). The clamping piece (83) contacts the surface of the filter plate (84). A threaded rod (86) is rotatably arranged in the clamping piece (83). The threaded rod (86) is threadedly connected to the connecting plate (82), and one end of the threaded rod (86) passes through the connecting plate (82).

2. A forward osmosis concentration device for fermentation liquid according to claim 1, characterized in that: The surfaces of the fixing plates (7) at both sides are provided with engaging grooves (71), which are arranged along the vertical direction, and the shape of the engaging grooves (71) is adapted to the side shape of the mounting plate (81).

3. A forward osmosis concentration device for fermentation liquid according to claim 2, characterized in that: A fixing groove (72) is provided on the surface of the fixing plate (7), and the shape of the fixing groove (72) is adapted to the shape of the engaging member (83).

4. A forward osmosis concentration device for fermentation liquid according to claim 1, characterized in that: One end of the threaded rod (86) extending from the connecting plate (82) is provided with a screwing handle (87).

5. A forward osmosis concentration device for fermentation liquid according to claim 1, characterized in that: The top surface of the box body (1) is detachably provided with a sealing cover (4).

6. A forward osmosis concentration device for fermentation liquid according to claim 1, characterized in that: Communication pipes (9) are provided on both sides of the surface of the box body (1), and the communication pipes (9) on both sides are respectively connected to the feed solution chamber (2) and the concentration chamber (3).

7. A forward osmosis concentration device for fermentation liquid according to claim 1, characterized in that: A water pump (10) is arranged on the surface of the connecting pipe (9).

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