Concentration membrane system applied to production of L-homoserine

Abstract

The utility model discloses a concentration membrane system applied to production of L-homoserine, and belongs to the technical field of concentration membranes. The problems of high energy consumption and low efficiency in the prior art are solved. According to the technical key points, the left side of a first pipeline is connected with an ultrafiltration membrane clear liquid tank, and the right side is connected with a concentration membrane group; the left side of the third pipeline is connected with the concentration membrane circulating tank, the right side of the third pipeline is connected with the first pipeline, the left side of the fifth pipeline is connected with the first pipeline, and the right side of the fifth pipeline is connected with the evaporation system. According to the utility model, a concentration membrane technology is used, so that the concentration of fermentation liquor can be improved, the fermentation liquor enters an evaporation system at a relatively high concentration, the change of a target product caused by long-time high temperature is avoided, the use amount of steam is reduced, and the generation of wastewater in the evaporation system can also be reduced; meanwhile, the materials can be separated and concentrated at normal temperature, so that the biological activity and the stability of the materials can be well kept.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of concentration membrane, specifically to a concentration membrane system for L-homoserine production. BACKGROUND

[0002] In the traditional evaporation process, the method for improving the concentration of fermentation liquor is to concentrate the treated fermentation liquor by using an evaporator, that is, to heat the material liquid by using steam through an evaporation heat exchange system, so that the material liquid reaches the vaporization temperature, the water in the material liquid is separated out, and the target product is retained, so that the concentration required by the process is reached.

[0003] However, direct evaporation can cause many hazards, mainly the release of toxic gases, which can cause serious harm to human health and even death; at the same time, it can also make the working environment unsafe, easily causing explosions, fires, etc., causing casualties and property losses. And it involves heating of the material liquid and vaporization of the solvent, so it needs to consume a lot of energy, and it can cause damage to some heat-sensitive substances.

[0004] Therefore, it is urgent to provide a concentration membrane system for L-homoserine production to solve the problems of high energy consumption and low efficiency in the prior art. CONTENT OF THE UTILITY MODEL

[0005] In view of the above facts, the utility model is designed to solve the problems of high energy consumption and low efficiency in the prior art, and further designs a concentration membrane system for L-homoserine production.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] A concentration membrane system for L-homoserine production, comprising: an ultrafiltration membrane clear liquid tank, a concentration membrane group, a security filter, a concentration membrane feed pump, a condenser, a concentration membrane circulating tank, an evaporation system, an evaporation feed filter, an evaporation feed pump, a circulating water inlet tank, a circulating water return tank, a cleaning water tank, a fermentation liquor clear liquid tank, a first emptying tank, a second emptying tank, a dialysis water tank, a third emptying tank, a heat exchanger, a dialysis water pump, a fermentation liquor receiving tank, a fermentation secondary condensate tank, a plate frame water return tank, a primary condensate tank, and a ceramic membrane pure water tank.

[0008] The first pipeline is connected to the ultrafiltration membrane clear liquid tank on the left side and to the concentration membrane group on the right side, and the first pipeline is sequentially provided with a clear liquid tank discharge valve, a clear liquid discharge automatic valve, a first clear liquid pump inlet valve, a security filter, a second clear liquid pump inlet valve, a concentration membrane feed pump, a concentration membrane pump outlet check valve, a concentration membrane feed regulating valve, a condenser, and a concentration membrane feed valve.

[0009] The third pipeline is connected with the concentrated membrane circulating tank on the left side and the first pipeline on the right side, and a concentrated liquid discharge valve is installed on the second pipeline;

[0010] The fifth pipeline is connected with the first pipeline on the left side, and the evaporation system on the right side, and a second evaporation feed pump inlet valve, an evaporation feed pump, an evaporation pump outlet check valve, an evaporation feed flow regulating valve are installed on the fourth pipeline in sequence;

[0011] The seventh pipeline is connected with the circulating water inlet tank on the left side and the circulating water return tank on the right side, and a second circulating water valve, a circulating water return valve, a condenser, a circulating water cooling water return valve are installed on the seventh pipeline in sequence;

[0012] The eighth pipeline is connected with the ultrafiltration membrane liquid tank on the left side and the concentrated membrane group on the right side, and a first liquid circulating valve, a first liquid circulating hand valve, a concentrated membrane pressure regulating valve are installed on the eighth pipeline in sequence;

[0013] The ninth pipeline is connected with the concentrated membrane circulating tank on the left side and the eighth pipeline on the right side, and a second liquid circulating valve and a second liquid circulating hand valve are installed on the ninth pipeline in sequence;

[0014] The tenth pipeline is connected with the cleaning water tank on the left side and the concentrated membrane circulating tank on the right side, and a first cleaning water inlet tank valve is installed on the tenth pipeline;

[0015] The eleventh pipeline is connected with the fermentation liquid tank on the left side and the concentrated membrane circulating tank on the right side, and a first liquid inlet tank valve is installed on the eleventh pipeline;

[0016] The ultrafiltration membrane liquid tank is connected with the first emptying tank on the upper end, and the concentrated membrane circulating tank is connected with the second emptying tank on the upper end;

[0017] The fourteenth pipeline is connected with the concentrated membrane group on the left side and the dialysis water tank on the right side;

[0018] The dialysis water tank is connected with the third emptying tank on the upper end;

[0019] The fifteenth pipeline is connected with the dialysis water tank on the left side and the lower end of the heat exchanger on the right side, and a dialysis water tank outlet valve, a dialysis water pump, a dialysis water pump outlet check valve, a dialysis water pump outlet valve are installed on the fifteenth pipeline in sequence;

[0020] The seventeenth pipeline is connected with the upper end of the heat exchanger, and then is divided into the eighteenth pipeline, the nineteenth pipeline and the twentieth pipeline, and a dialysis water return fermentation liquid valve and a fermentation liquid receiving tank are connected on the eighteenth pipeline in sequence, a dialysis water return secondary condensate valve and a fermentation secondary condensate tank are connected on the nineteenth pipeline in sequence, and a dialysis water return plate frame valve and a plate frame water return tank are connected on the twentieth pipeline in sequence.

[0021] The twenty-first pipeline is connected with the upper end of the heat exchanger on the left side and connected with the primary condensate tank on the right side, and a primary condensate water inlet valve and a heat exchanger temperature adjusting valve are sequentially arranged on the twenty-first pipeline.

[0022] The twenty-second pipeline is connected with the lower end of the heat exchanger on the left side and connected with the ceramic membrane pure water tank on the right side, and a dialysis water heat exchanger drain valve group is arranged on the twenty-second pipeline.

[0023] Further, the second pipeline is connected with the first pipeline, and the connection point is between the ultrafiltration membrane clear liquid tank and the clear liquid tank discharge valve, and a clear liquid tank bottom discharge valve is arranged on the second pipeline.

[0024] Further, the fourth pipeline is connected with the third pipeline, and the connection point is between the concentration membrane circulating tank and the concentrated liquid discharge valve, and a concentrated liquid tank bottom discharge valve is arranged on the third pipeline.

[0025] Further, the sixth pipeline is connected with the third pipeline on the left side, and the left connection point is between the concentration membrane circulating tank and the concentrated liquid discharge valve, and the sixth pipeline is connected with the fifth pipeline on the right side, and the right connection point is between the clear liquid tank bottom discharge bypass valve and the first evaporation feed pump inlet valve, and a concentrated liquid discharge bypass valve is arranged on the sixth pipeline.

[0026] Further, the twelfth pipeline is connected with the eleventh pipeline on the left side, and the left connection point is between the fermentation liquid clear liquid tank and the first clear liquid inlet tank valve, and the twelfth pipeline is connected with the ultrafiltration membrane clear liquid tank on the right side, and a second clear liquid inlet tank valve is arranged on the twelfth pipeline.

[0027] Further, the thirteenth pipeline is connected with the tenth pipeline on the left side, and the left connection point is between the cleaning water tank and the first cleaning water inlet tank valve, and the thirteenth pipeline is connected with the ultrafiltration membrane clear liquid tank on the right side, and a second cleaning water inlet tank valve is arranged on the thirteenth pipeline.

[0028] Further, the sixteenth pipeline is connected with the fifteenth pipeline, and the connection point is between the dialysis water tank and the dialysis water tank outlet valve, and a dialysis water discharge valve is arranged on the sixteenth pipeline.

[0029] The beneficial effects of the utility model lie in:

[0030] 1. The utility model can save energy, because the operation temperature is low, and mainly utilizes pressure as driving force, so that the energy consumption of the concentration membrane is relatively low, and energy saving and emission reduction are helpful.

[0031] 2. The utility model has high separation efficiency, the effective area of the concentration membrane is large, the filtration speed is fast, efficient separation and concentration can be realized, and product yield is improved.

[0032] 3. The separation process of the utility model has no phase change, and the liquid does not change phase in the concentration process, that is, no steam is generated, which is helpful to protect the activity and stability of heat-sensitive substances and avoid damage to materials caused by high temperature.

[0033] 4. The utility model operation condition is gentle, and the concentration film usually carries out operation at normal temperature or lower temperature, and is applicable to temperature sensitive material, such as biological preparation, medicine and the like.

[0034] 5. The utility model degree of automation is high, and the concentration film system is usually equipped with advanced automatic control system, can realize remote monitoring and adjustment, improves production efficiency and reduces artificial cost.

[0035] 6. The utility model occupies small area, and the concentration film system structure is compact, is favorable for realizing efficient production in limited space. ACCURACY OF DRAWINGS

[0036] Figure 1 It is the structural diagram of the utility model;

[0037] In the drawing: 1-ultrafiltration membrane clear liquid tank, 2-concentration film group, 3-clear liquid tank discharge valve, 4-clear liquid discharge automatic valve, 5-first clear liquid pump inlet valve, 6-safety filter, 7-second clear liquid pump inlet valve, 8-concentration membrane feed pump, 9-concentration membrane pump outlet check valve, 10-concentration membrane feed regulating valve, 11-condenser, 12-concentration membrane feed valve, 13-clear liquid tank tank bottom discharge valve, 14-concentration membrane circulating tank, 15-concentrated liquid discharge valve, 16-concentrated liquid tank bottom discharge valve, 17-evaporation system, 18-clear liquid tank tank bottom discharge bypass valve, 19-first evaporation feed pump inlet valve, 20-evaporation feed filter, 21-second evaporation feed pump inlet valve, 22-evaporation feed pump, 23-evaporation pump outlet check valve, 24-evaporation feed flow regulating valve, 25-concentrated liquid discharge bypass valve, 26-circulating water inlet tank, 27-circulating water return tank, 28-clear liquid through warm water valve, 29-clear liquid cooling regulating valve, 30-clear liquid cooling water return valve, 31-first clear liquid circulating valve, 32-first clear liquid circulating hand valve, 33-concentration membrane pressure regulating valve, 34-second clear liquid circulating valve, 35-second clear liquid circulating hand valve, 36-cleaning water tank, 37-first cleaning water inlet tank valve, 38-fermentation liquid clear liquid tank, 39-first clear liquid inlet tank valve, 40-second clear liquid inlet tank valve, 41-second cleaning water inlet tank valve, 42-first emptying tank, 43-second emptying tank, 44-dialysis water tank, 45-third emptying tank, 46-heat exchanger, 47-dialysis water tank outlet valve, 48-dialysis water pump, 49-dialysis water pump outlet check valve, 50-dialysis water pump outlet valve, 51-dialysis water discharge valve, 52-dialysis water back to fermentation liquid valve, 53-fermentation liquid receiving tank, 54-dialysis water back to secondary condensate valve, 55-fermentation secondary condensate tank, 56-dialysis water back to plate frame valve, 57-plate frame water return tank, 58-primary condensate tank, 59-primary condensate inlet valve, 60-heat exchanger temperature regulating valve, 61-ceramic membrane pure water tank, 62-dialysis water heat exchanger trap valve group. DETAILED DESCRIPTION

[0038] In order to make the personnel in the technical field better understand the scheme of the present application, the technical scheme in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0039] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0040] In the present application, the terms "upper", "lower", "inner", "middle", "outer", "front", "back" and the like indicate the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0041] In addition, in addition to being used to indicate the orientation or positional relationship, the above-mentioned part of the terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain attachment relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in the present application can be understood according to the specific circumstances.

[0042] In addition, the terms "set", "connected", "fixed" should be broadly understood. For example, "connected" can be fixedly connected, detachably connected, or integrally configured; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0043] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0044] The preferred embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0045] Embodiment 1: A concentration membrane system applied to L-homoserine production, comprising: an ultrafiltration membrane clear liquid tank 1, a concentration membrane group 2, a security filter 6, a concentration membrane feed pump 8, a condenser 11, a concentration membrane circulating tank 14, an evaporation system 17, an evaporation feed filter 20, an evaporation feed pump 22, a circulating water inlet tank 26, a circulating water return tank 27, a cleaning water tank 36, a fermentation liquid clear liquid tank 38, a first emptying tank 42, a second emptying tank 43, a dialysis water tank 44, a third emptying tank 45, a heat exchanger 46, a dialysis water pump 48, a fermentation liquid receiving tank 53, a fermentation secondary condensate tank 55, a plate frame water return tank 57, a primary condensate tank 58, a ceramic membrane pure water tank 61;

[0046] The first pipeline is connected to the ultrafiltration membrane clear liquid tank 1 on the left side and connected to the concentration membrane group 2 on the right side, and the first pipeline is sequentially provided with a clear liquid tank discharge valve 3, a clear liquid discharge automatic valve 4, a first clear liquid pump inlet valve 5, the security filter 6, a second clear liquid pump inlet valve 7, the concentration membrane feed pump 8, a concentration membrane pump outlet check valve 9, a concentration membrane feed adjusting valve 10, the condenser 11 and a concentration membrane feed valve 12;

[0047] The third pipeline is connected to the concentration membrane circulating tank 14 on the left side and connected to the first pipeline on the right side, and the right connection point is between the clear liquid discharge automatic valve 4 and the first clear liquid pump inlet valve 5, and the second pipeline is provided with a concentrated liquid discharge valve 15;

[0048] The fifth pipeline is connected to the first pipeline on the left side, and the left connection point is between the ultrafiltration membrane clear liquid tank 1 and the clear liquid tank discharge valve 3, and the right side is connected to the evaporation system 17, and the fourth pipeline is sequentially provided with a clear liquid tank bottom discharge bypass valve 18, a first evaporation feed pump inlet valve 19, the evaporation feed filter 20, a second evaporation feed pump inlet valve 21, the evaporation feed pump 22, an evaporation pump outlet check valve 23 and an evaporation feed flow adjusting valve 24;

[0049] The seventh pipeline is connected to the circulating water inlet tank 26 on the left side and connected to the circulating water return tank 27 on the right side, and the seventh pipeline is sequentially connected to a clear liquid warm water valve 28, a clear liquid cooling adjusting valve 29, the condenser 11 and a clear liquid cooling water return valve 30;

[0050] The eighth pipeline is connected to the ultrafiltration membrane clear liquid tank 1 on the left side and connected to the concentration membrane group 2 on the right side, and the eighth pipeline is sequentially provided with a first clear liquid circulating valve 31, a first clear liquid circulating hand valve 32 and a concentration membrane pressure adjusting valve 33;

[0051] The ninth pipeline is connected to the concentration membrane circulating tank 14 on the left side and connected to the eighth pipeline on the right side, and the right connection point is between the clear liquid circulating hand valve 32 and the concentration membrane pressure adjusting valve 33, and the ninth pipeline is sequentially provided with a second clear liquid circulating valve 34 and a second clear liquid circulating hand valve 35.

[0052] The tenth pipeline is connected to the cleaning water tank 36 on the left side and to the concentrated membrane circulating tank 14 on the right side, and a first cleaning water inlet tank valve 37 is installed on the tenth pipeline;

[0053] The eleventh pipeline is connected to the fermentation liquid supernatant tank 38 on the left side and to the concentrated membrane circulating tank 14 on the right side, and a first supernatant inlet tank valve 39 is installed on the eleventh pipeline;

[0054] The first emptying tank 42 is connected to the upper end of the ultrafiltration membrane supernatant tank 1, and the second emptying tank 43 is connected to the upper end of the concentrated membrane circulating tank 14.

[0055] The fourteenth pipeline is connected to the concentrated membrane group 2 on the left side and to the dialysis water tank 44 on the right side.

[0056] The third emptying tank 45 is connected to the upper end of the dialysis water tank 44.

[0057] The fifteenth pipeline is connected to the dialysis water tank 44 on the left side and to the lower end of the heat exchanger 46 on the right side, and a dialysis water tank outlet valve 47, a dialysis water pump 48, a dialysis water pump outlet check valve 49, and a dialysis water pump outlet valve 50 are installed in sequence on the fifteenth pipeline.

[0058] The seventeenth pipeline is connected to the upper end of the heat exchanger 46, and then divided into the eighteenth pipeline, the nineteenth pipeline, and the twentieth pipeline. The eighteenth pipeline is connected to the dialysis water back to fermentation liquid valve 52 and the fermentation liquid receiving tank 53 in sequence. The nineteenth pipeline is connected to the dialysis water back to secondary condensate valve 54 and the fermentation secondary condensate tank 55 in sequence. The twentieth pipeline is connected to the dialysis water back to plate frame valve 56 and the plate frame water back tank 57 in sequence.

[0059] The twenty-first pipeline is connected to the upper end of the heat exchanger 46 on the left side and to the primary condensate tank 58 on the right side, and a primary condensate water inlet valve 59 and a heat exchanger temperature adjusting valve 60 are installed in sequence on the twenty-first pipeline.

[0060] The twenty-second pipeline is connected to the lower end of the heat exchanger 46 on the left side and to the ceramic membrane pure water tank 61 on the right side, and a dialysis water heat exchanger drain valve group 62 is installed on the twenty-second pipeline.

[0061] More specifically, the second pipeline is connected to the first pipeline between the ultrafiltration membrane supernatant tank 1 and the supernatant tank discharge valve 3, and a supernatant tank bottom discharge valve 13 is installed on the second pipeline.

[0062] More specifically, the fourth pipeline is connected to the third pipeline between the concentrated membrane circulating tank 14 and the concentrated liquid discharge valve 15, and a concentrated liquid tank bottom discharge valve 16 is installed on the third pipeline.

[0063] More specifically: the sixth pipeline left side connected to the third pipeline, left connection point between the concentration membrane circulating tank 14 and the concentrated liquid discharge valve 15, the right side connected to the fifth pipeline, the right connection point between the clear liquid tank tank bottom discharge bypass valve 18 and the first evaporation feed pump inlet valve 19, the sixth pipeline is installed with concentrated liquid discharge bypass valve 25.

[0064] More specifically: the twelfth pipeline left side connected to the eleventh pipeline, left connection point between the fermentation liquid clear liquid tank 38 and the first clear liquid into tank valve 39, the right side connected to the ultrafiltration membrane clear liquid tank 1, the twelfth pipeline is installed with the second clear liquid into tank valve 40.

[0065] More specifically: the thirteenth pipeline left side connected to the tenth pipeline, left connection point between the cleaning water tank 36 and the first cleaning water into tank valve 37, the right side connected to the ultrafiltration membrane clear liquid tank 1, the thirteenth pipeline is installed with the second cleaning water into tank valve 41.

[0066] More specifically: the sixteenth pipeline connected to the fifteenth pipeline, the connection point between the dialysis water tank 44 and the dialysis water tank outlet valve 47, the sixteenth pipeline is installed with the dialysis water discharge valve 51.

[0067] Example 2: one application of the concentration membrane system for the production of L-homoserine in this embodiment, the concentration membrane specific requirements as follows:

[0068] Feed solution 135 m 3 / d]]> Filtering time 20 Hour Feed solution 6.75 m 3 / h]]> Concentration factor 4 Times Permeate 5.06 m 3 / h]]> Design permeation flux 9 LMH Theoretically calculated total membrane area 562 m 2 ]]> Single membrane area 37 m 2 ]]> Theoretically calculated membrane module number 15 Branches

[0069] More specifically: the temperature of the concentration membrane circulating tank is 40-50 degrees Celsius.

[0070] More specifically: the import and export pressure of the concentration membrane assembly is 80 Bar.

[0071] More specifically: the temperature of the main equipment is below 50 degrees Celsius.

[0072] More specifically: the interlock and control of the feed pump, high pressure pump, circulating pump, frequency regulation of the feed pump, high pressure pump, circulating pump.

[0073] More specifically: when the ultrafiltration membrane filtrate from the ultrafiltration membrane permeate tank is pumped into the concentration membrane system, the high pressure concentration system starts to run; the material first passes through the security filter, intercepts the residual particulate foreign matter in the ultrafiltration filtrate, protects the pump blade and the concentration membrane, and then enters the concentration membrane for separation, the homoserine and other substances larger than the molecular weight of the membrane cut-off cannot pass through the membrane surface and are intercepted to form concentrated liquid, water and substances smaller than the molecular weight of the membrane cut-off are permeated through the membrane surface into the dialysate under the action of pressure, and the continuous circulation concentration reaches the required concentration multiple in the process.

[0074] More specifically: through the concentration treatment of the concentration film, the steam use amount of the evaporation system is reduced, 15 tons of steam are expected to be saved per day, 5475 tons of steam are saved per year, and the steam cost of 1122375 yuan per year can be saved according to 205 yuan per ton of steam.

[0075] Finally, it should be pointed out that: the above examples are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing examples, the technical solutions described in the foregoing examples can still be modified, or some or all of the technical features can be replaced by equivalents; as long as there is no structural conflict, each feature in the specific embodiments disclosed in the present application can be used in combination with any other feature, and the corresponding technical solution will not deviate from the scope of the technical solutions of the present application.

[0076] In addition, it should be understood that, although the present application is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A concentration membrane system for L-homoserine production, characterized in that: The system comprises an ultrafiltration membrane clear liquid tank (1), a concentration membrane group (2), a security filter (6), a concentration membrane feed pump (8), a condenser (11), a concentration membrane circulation tank (14), an evaporation system (17), an evaporation feed filter (20), an evaporation feed pump (22), a circulating water inlet tank (26), a circulating water return tank (27), a cleaning water tank (36), a fermentation liquid clear liquid tank (38), a first emptying tank (42), a second emptying tank (43), a dialysis water tank (44), a third emptying tank (45), a heat exchanger (46), a dialysis water pump (48), a fermentation liquid receiving tank (53), a fermentation secondary condensate tank (55), a plate and frame water return tank (57), a primary condensate tank (58), and a ceramic membrane pure water tank (61); The left side of the first pipeline is connected to the ultrafiltration membrane clear liquid tank (1), and the right side is connected to the concentration membrane group (2). The first pipeline is sequentially installed with a clear liquid tank discharge valve (3), a clear liquid discharge automatic valve (4), a first clear liquid pump inlet valve (5), a safety filter (6), a second clear liquid pump inlet valve (7), a concentration membrane feed pump (8), a concentration membrane pump outlet check valve (9), a concentration membrane feed regulating valve (10), a condenser (11), and a concentration membrane feed valve (12); The left side of the third pipeline is connected to the concentrated membrane circulation tank (14), and the right side is connected to the first pipeline. The right connection point is between the clear liquid discharge automatic valve (4) and the first clear liquid pump inlet valve (5). The concentrated liquid discharge valve (15) is installed on the second pipeline. The left side of the fifth pipeline is connected to the first pipeline, the left connection point is between the ultrafiltration membrane clear liquid tank (1) and the clear liquid tank discharge valve (3), and the right side is connected to the evaporation system (17). The fourth pipeline is sequentially installed with a clear liquid tank bottom discharge bypass valve (18), a first evaporation feed pump inlet valve (19), an evaporation feed filter (20), a second evaporation feed pump inlet valve (21), an evaporation feed pump (22), an evaporation pump outlet check valve (23), and an evaporation feed flow regulating valve (24); The left side of the seventh pipeline is connected to the circulating water inlet tank (26), and the right side is connected to the circulating water return tank (27). The seventh pipeline is sequentially connected to the clear liquid through the warm water valve (28), the clear liquid cooling regulating valve (29), the condenser (11), and the clear liquid cooling water return valve (30); The left side of the eighth pipeline is connected to the ultrafiltration membrane clear liquid tank (1), and the right side is connected to the concentration membrane group (2). The eighth pipeline is sequentially installed with a first clear liquid circulation valve (31), a first clear liquid circulation manual valve (32), and a concentration membrane pressure regulating valve (33); The left side of the ninth pipeline is connected to the concentrated membrane circulation tank (14), and the right side is connected to the eighth pipeline. The right connection point is between the clear liquid circulation manual valve (32) and the concentrated membrane pressure regulating valve (33). The ninth pipeline is sequentially installed with the second clear liquid circulation valve (34) and the second clear liquid circulation manual valve (35); The left side of the tenth pipeline is connected to the cleaning water tank (36), and the right side is connected to the concentrated membrane circulation tank (14). The first cleaning water inlet valve (37) is installed on the tenth pipeline; The left side of the eleventh pipeline is connected to the fermentation liquid clear liquid tank (38), and the right side is connected to the concentrated membrane circulation tank (14). The first clear liquid inlet valve (39) is installed on the eleventh pipeline; The upper end of the ultrafiltration membrane clear liquid tank (1) is connected to a first emptying tank (42), and the upper end of the concentrated membrane circulation tank (14) is connected to a second emptying tank (43); The left side of the fourteenth pipeline is connected to the concentration membrane group (2), and the right side is connected to the dialysis water tank (44); The upper end of the dialysis water tank (44) is connected to a third emptying tank (45); The left side of the fifteenth pipeline is connected to the dialysis water tank (44), and the right side is connected to the lower end of the heat exchanger (46). The fifteenth pipeline is sequentially installed with a dialysis water tank outlet valve (47), a dialysis water pump (48), a dialysis water pump outlet check valve (49), and a dialysis water pump outlet valve (50); The seventeenth pipeline is connected to the upper end of the heat exchanger (46), and then divided into the eighteenth pipeline, the nineteenth pipeline, and the twentieth pipeline. The eighteenth pipeline is connected in sequence to the dialysate water return to the fermentation liquid valve (52) and the fermentation liquid receiving tank (53). The nineteenth pipeline is connected in sequence to the dialysate water return to the secondary condensate valve (54) and the fermentation secondary condensate tank (55). The twentieth pipeline is connected in sequence to the dialysate water return to the plate-frame valve (56) and the plate-frame water return tank (57). The left side of the twenty-first pipeline is connected to the upper end of the heat exchanger (46), and the right side is connected to the primary condensate tank (58). The twenty-first pipeline is sequentially installed with a primary condensate inlet valve (59) and a heat exchanger temperature regulating valve (60); The left side of the twenty-second pipeline is connected to the lower end of the heat exchanger (46), and the right side is connected to the ceramic membrane pure water tank (61). The dialysis water heat exchanger steam trap valve group (62) is installed on the twenty-second pipeline.

2. The concentration membrane system for L-homoserine production according to claim 1, characterized in that: The second pipeline is connected to the first pipeline, and the connection point is between the ultrafiltration membrane clear liquid tank (1) and the clear liquid tank discharge valve (3). The second pipeline is equipped with a clear liquid tank bottom discharge valve (13).

3. The concentration membrane system for L-homoserine production according to claim 1, characterized in that: The fourth pipeline is connected to the third pipeline, and the connection point is between the concentrated membrane circulation tank (14) and the concentrated liquid discharge valve (15). The third pipeline is equipped with a concentrated liquid tank bottom discharge valve (16).

4. The concentration membrane system for L-homoserine production according to claim 1, characterized in that: The left side of the sixth pipeline is connected to the third pipeline, and the left connection point is between the concentrated membrane circulation tank (14) and the concentrated liquid discharge valve (15). The right side is connected to the fifth pipeline, and the right connection point is between the clear liquid tank bottom discharge bypass valve (18) and the first evaporation feed pump inlet valve (19). The concentrated liquid discharge bypass valve (25) is installed on the sixth pipeline.

5. The concentration membrane system for L-homoserine production according to claim 1, characterized in that: The left side of the twelfth pipeline is connected to the eleventh pipeline, and the left connection point is between the fermentation liquid clear liquid tank (38) and the first clear liquid inlet valve (39). The right side is connected to the ultrafiltration membrane clear liquid tank (1). The second clear liquid inlet valve (40) is installed on the twelfth pipeline.

6. The concentration membrane system for L-homoserine production according to claim 1, characterized in that: The left side of the thirteenth pipeline is connected to the tenth pipeline, and the left connection point is between the cleaning water tank (36) and the first cleaning water inlet valve (37). The right side is connected to the ultrafiltration membrane clear liquid tank (1). The second cleaning water inlet valve (41) is installed on the thirteenth pipeline.

7. The concentration membrane system for L-homoserine production according to claim 1, characterized in that: The sixteenth pipeline is connected to the fifteenth pipeline, and the connection point is between the dialysis water tank (44) and the dialysis water tank outlet valve (47). The dialysis water discharge valve (51) is installed on the sixteenth pipeline.

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