Full-automatic biological agent ultrafiltration membrane concentration device
Through the fully automatic bio-bacterial ultrafiltration membrane concentration device, the problems of membrane contamination and cumbersome operation in the existing technology are solved, and the concentration process is automated and efficient production is realized, and the product quality and the service life of the membrane are improved.
Patent Information
- Application Number
- CN202420724502.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-09
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-04-09
Smart Images
Figure CN222567364U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of fermentation industry, in particular to a fully automatic biological bacterial agent ultrafiltration membrane concentration device. Background Art
[0002] In the current fermentation industry, liquid bio-inoculation products are generally directly bottled with liquid fermentation liquid, and the number of colonies in the fermentation liquid is generally 10 8 -10 9 CFU / ml, if the fermentation liquid can be concentrated to a certain multiple, the volume of the concentrated liquid will be greatly reduced, thus saving a lot of costs in the packaging and transportation of liquid bacterial agent products. At the same time, the number of colonies in the product after multiple concentration will also increase multiple times, thus improving the intrinsic quality of the product and increasing its competitiveness.
[0003] Concentration refers to the process of increasing the concentration of a solution by evaporating the solvent. It generally refers to the reduction of the unnecessary part and the increase of the relative content of the necessary part. In recent years, with the development of membrane technology, ultrafiltration technology has been increasingly used in the field of concentration. Ultrafiltration membrane is a type of ultrafiltration membrane. It is a relatively mature and advanced technology in ultrafiltration technology. This membrane material has very strong and durable characteristics, with an oil-repellent and hydrophilic surface, so it has higher permeability, pollution resistance and easy cleaning characteristics. At the same time, it also performs extremely well in terms of heat resistance and chemical tolerance. It breaks through the boundaries of traditional organic membranes and inorganic ceramic membranes, and has oil resistance, high temperature resistance, chemical resistance, and high flux. The ultrafiltration membrane is covered with micropores, and the pore size is relatively large based on the molecular weight of the substance that can be retained. The retained molecular weight can reach from thousands to hundreds of thousands. The raw water is pressurized and flows outside or in the inner cavity of the ultrafiltration membrane, which constitutes external pressure and internal pressure respectively. Ultrafiltration is a dynamic filtration process. The retained substances can be discharged with the concentrated water without clogging the membrane surface and can operate continuously for a long time. The ultrafiltration membrane is one of the earliest developed polymer separation membranes. Ultrafiltration technology is a high-tech technology widely used in water purification, solution separation, concentration, and extraction of useful substances from wastewater. It is a simple use process, no heating required, energy saving, low-pressure operation, and small footprint.
[0004] Since biological agents contain a large number of live bacteria, the selection of the concentration process of liquid biological agents should consider the survival rate of live biological bacteria in the product, the energy consumption per unit product, the stability of equipment operation, and the small footprint and low investment cost. In the past, the process of heating and evaporation was prone to cause the death of live bacteria and had high energy consumption. The above problems can be solved by using ultrafiltration membrane filtration and concentration, but there are also some defects in the use of ultrafiltration concentration: 1. The ultrafiltration membrane is easily contaminated, resulting in low concentration efficiency and equipment damage; 2. After the membrane is blocked, it needs to be frequently removed and cleaned, and the operation is cumbersome; 3. The concentration multiple often requires manual measurement, and the work efficiency is low; 4. Some biological agents release heat during the concentration process, and excessively high temperatures will damage the ultrafiltration membrane; 5. The problem of uneven mixing of the concentrate; 5. The problem that the biological agent is easily contaminated by miscellaneous bacteria during the concentration process. In practical applications, it is necessary to improve the conventional ultrafiltration membrane concentration process to solve these problems. Utility Model Content
[0005] The purpose of the utility model is to overcome the defects of the existing ultrafiltration membrane concentration technology, adopt a fully automatic biological bacterial agent ultrafiltration membrane and a concentration device to concentrate the biological bacterial agent fermentation liquid, remove excess solvent, increase the number of live bacteria in the bacterial agent, facilitate packaging and transportation, reduce the usage per unit area, and provide a more automated and industrializable concentration device.
[0006] Specifically, it comprises: a concentration tank (1), a skid-mounted ultrafiltration membrane concentration device, compressed air (10), low-pressure steam (11), a product filling port (12), pure water (13), tap water (14), a drainage pipe (15), and a ditch-to-sewage treatment system (16); the skid-mounted ultrafiltration membrane concentration device comprises a chemical cleaning tank (2), a booster pump (3), a cooler (4), an ultrafiltration membrane assembly (5), a clear liquid water tank (6), a backwash pump (7), an automatic controller (8), and a filtrate flow meter (9);
[0007] The concentration tank (1) is provided with a plurality of connecting pipes or connecting ports, and the fermentation tank (17) is connected to the fermentation liquid inlet (1-1) on the concentration tank (1) through a pipeline; the compressed air (10) passes through a sterilizing filter (10-1) and is connected to the air inlet pipe (1-2) on the concentration tank (1), the air inlet pipe extends to the bottom of the concentration tank (1), and the air inlet pipe (1-2) is connected to a perforated annular pipe at the bottom of the concentration tank (1) to evenly distribute the air; the exhaust port (1-3) on the concentration tank (1) is connected to the outside through a pipeline, and a manual valve is provided on the pipeline; the concentrated liquid reflux port (1-4) on the concentration tank (1) is connected to the ultrafiltration membrane assembly (5) through a pipeline; the agitator (1-6) is installed on the top of the concentration tank (1); the low-pressure steam (11) is respectively connected to the sterilizing filter (10-1) and the liquid outlet (1-5) at the bottom of the concentration tank (1);
[0008] At the same time, the liquid outlet (1-5) at the bottom of the concentration tank (1) is divided into three pipelines, one of which is connected to the product filling port (12), another is connected to the sewage treatment system (16) through the ditch, and the third is connected to the inlet of the booster pump (3) through a pipeline. A pressure type liquid level sensor (3-1) is provided on this section of the pipeline to measure the liquid level height in the concentration tank (1). The pressure type liquid level sensor (3-1) is electrically connected to the automatic controller (8); the cooler (4) is a shell and tube heat exchanger, the material flows through the shell side, the cooling medium flows through the tube side, and the cooling medium can Circulating cooling water or tap water is used; the outlet of the booster pump (3) is connected to the material inlet of the cooler (4), the material outlet is connected to the liquid bacterial agent inlet of the ultrafiltration membrane assembly (5), a temperature sensor (4-2) is provided at the material outlet for detecting the temperature of the liquid bacterial agent, the cooling medium inlet is connected to the tap water (14), the cooling medium outlet is connected to the drainage pipe (15), an electric regulating valve (4-1) is provided at the cooling medium outlet, and the electric regulating valve (4-1) and the temperature sensor (4-2) are both connected to the automatic controller (8) through a circuit. The electric regulating valve (4-1) is connected to the ultrafiltration membrane assembly (5) and can realize automatic control of temperature and valve opening through computer programming. When the temperature exceeds the set temperature, the electric regulating valve (4-1) is opened to cool the liquid bacterial agent through tap water. When the temperature is lower than the set temperature, the electric regulating valve (4-1) is closed. The concentrated liquid outlet (5-1) of the ultrafiltration membrane assembly (5) is connected to the concentrated liquid reflux port (1-4) of the concentration tank (1) through the concentrated liquid reflux valve (5-4). The clear liquid outlet (5-2) of the ultrafiltration membrane assembly (5) is connected to the clear liquid inlet (6-1) of the clear liquid water tank (6). -1) is connected, and a clear liquid flow meter (9) and a clear liquid valve (5-3) are provided on this section of the pipeline; the clear liquid flow meter (9) can measure instantaneous flow and cumulative flow, and is connected to the automatic controller (8) through a circuit, and can use computer programming to achieve flow target value setting. Before the concentration begins, the amount of clear liquid to be discharged is calculated according to the planned concentration multiple, and is input as the target value. When the cumulative flow of the clear liquid flow meter (9) reaches the target value, the automatic controller (8) controls the booster pump (3) to stop, thereby achieving automatic concentration control. A clear liquid overflow port (6-5) is provided on the upper side of the clear liquid water tank (6) to connect to the ditch or sewage treatment system; two branches are provided at the lower part of the clear liquid water tank (6), which are respectively connected to the No. 1 backwash valve (6-2) and the emptying valve (6-3); the No. 1 backwash valve (6-2) is connected to the inlet of the backwash pump (7), and the outlet of the backwash pump (7) is connected to the clear liquid outlet (5-2) at the end of the ultrafiltration membrane assembly (5) through the No. 2 backwash valve (7-1);
[0009] The chemical cleaning tank (2) is provided with a plurality of connection ports. A first chemical cleaning valve (2-6) at the lower part of the chemical cleaning tank (2) is connected to the inlet of a booster pump (3), and the outlet of the booster pump (3) is connected to the chemical cleaning reflux port (2-4) at the upper part of the chemical cleaning tank (2) through a chemical cleaning reflux valve (2-9); the chemical cleaning port (2-3) of the chemical cleaning tank (2) is connected to the concentrated liquid outlet (5-1) of the ultrafiltration membrane assembly (5) through a second chemical cleaning valve (2-10); the pure water inlet (2-1) of the chemical cleaning tank (2) is connected to a pure water (13) pipeline; the chemical cleaning tank (2) is also provided with a chemical cleaning tank drain valve (2-5) connected to a drain ditch; and an electric heater (2-7) and a temperature transmitter (2-8) are also provided in the tank.
[0010] The concentrated liquid outlet (5-1) is also provided with a branch connected to a backwash valve (7-2).
[0011] The ultrafiltration membrane assembly (5) is a device unit composed of a plurality of ultrafiltration membrane elements, a membrane shell, and a bracket. The number of ultrafiltration membrane elements in the membrane assembly can be set according to the required processing capacity. The ultrafiltration membrane elements are in parallel relationship. The more the number, the greater the processing capacity. The filter membrane adopts a structure similar to a roll-type reverse osmosis membrane. The flat membrane and the grid are stacked together and rolled, and packaged into 4040 and 8040 type membrane elements commonly used in industry. The external dimensions and connection method are consistent with the roll-type reverse osmosis, so the ultrafiltration membrane can be installed in a common pressure vessel on the market. The ultrafiltration membrane uses a grid of a guide net with a corrugated structure. The corrugated grid size height has several specifications of 40-120mil. The inlet water is divided into multiple independent channels by these grids, and each channel is equivalent to a tubular membrane with a radius of 1-3mm. This unique structure ensures that the membrane packing density (membrane area) can withstand a high influent suspended solid content (maximum influent SS can reach 10,000 mg / l) during operation, and allows cross-flow operation at a higher flow rate, thereby increasing shear force and alleviating membrane fouling. The outlet of the cooler (4) is connected to the liquid bacterial agent inlet of the ultrafiltration membrane module (5), and the liquid biological bacterial agent is separated into a concentrated liquid and a clear liquid in the ultrafiltration membrane module (5), and the effective biological bacterial agent is intercepted.
[0012] The device is equipped with an automatic controller (8), to which all instruments and power equipment in the device are connected via circuits. A PLC industrial automation processor is provided in the controller, and computer programming is used to realize functions such as reading of instrument detection data of the entire device, automatic start and stop of the equipment, parameter setting, data recording, and fault alarm, thereby realizing fully automatic, safe, and efficient operation of the device. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a schematic diagram of a fully automatic biological bacterial agent ultrafiltration membrane concentration device of the utility model;
[0014] Figure 2 It is a schematic structural diagram of the skid-mounted ultrafiltration membrane concentration device of the utility model.
[0015] Concentration tank (1), chemical cleaning tank (2), booster pump (3), cooler (4), ultrafiltration membrane assembly (5), clear liquid water tank (6), backwash pump (7), automatic controller (8), filtrate flow meter (9), compressed air (10), low-pressure steam (11), product filling port (12), pure water (13), tap water (14), drain pipe (15), ditch to sewage treatment system (16), fermentation tank (17); sterilizing filter (10-1), fermentation liquid inlet (1-1), air inlet pipe (1-2), air inlet pipe (1-2), exhaust port (1-3), concentrate reflux port (1-4), feed liquid outlet (1-5), agitator (1-6), pure water inlet (2-1) chemical cleaning port ( 2-3), chemical cleaning reflux port (2-4), chemical cleaning tank drain valve (2-5), first chemical cleaning valve (2-6), electric heater (2-7), temperature transmitter (2-8), chemical cleaning reflux valve (2-9), second chemical cleaning valve (2-10), pressure type liquid level sensor (3-1), electric regulating valve (4-1), temperature sensor (4-2), concentrated liquid outlet (5-1), clean liquid outlet (5-2), clean liquid valve (5-3), concentrated liquid reflux valve (5-4), clean liquid inlet (6-1), No. 1 backwash valve (6-2), drain valve (6-3), water tank drain valve (6-4), clean liquid overflow port (6-5), No. 2 backwash valve (7-1), backwash valve (7-2). DETAILED DESCRIPTION
[0016] The following is combined with Figure 1 The utility model is further described in detail with the following specific embodiments: the application is further described with this example. However, the utility model is not limited to the following embodiments.
[0017] Example 1
[0018] This example provides a fully automatic biological agent ultrafiltration membrane concentration device, which specifically comprises: a concentration tank (1), a skid-mounted ultrafiltration membrane concentration device (attached Figure 2 ) consists of two major parts, of which the skid-mounted ultrafiltration membrane concentration device (attached Figure 2) is a space-saving, mobile, easy-to-install and multi-functional skid-mounted device, which includes a chemical cleaning tank (2), a booster pump (3), a cooler (4), an ultrafiltration membrane assembly (5), a clear liquid water tank (6), a backwash pump (7), an automatic controller (8), and a filtrate flow meter (9). In addition, in order to realize the use function of the entire device, it should also include parts connected to the outside of the device, specifically including: compressed air (10), low-pressure steam (11), product filling port (12), pure water (13), tap water (14), a drainage pipe (15), and a ditch to sewage treatment system (16).
[0019] The concentration tank (1) is used to store liquid biological agents after fermentation. The equipment is provided with a plurality of connecting pipe openings. The fermentation tank is connected to the fermentation liquid inlet (1-1) through a pipeline. Compressed air (10) is connected to the air inlet (1-2) through a sterilizing filter (10-1). The air inlet pipeline extends to the bottom of the concentration tank (1). The air is evenly distributed by connecting an annular perforated pipe. The compressed air is passed into the tank to achieve air stirring to prevent stratification caused by uneven bacterial agents. Secondly, the compressed air can be used to pressurize the tank to achieve the transportation and canning of the feed liquid. The exhaust port (1-3) is connected to the outside through a pipeline for venting. A manual valve is provided on the pipeline. The concentrate reflux port (1-4) is connected to the ultrafiltration membrane assembly (5) through a pipeline. The agitator (1-6) is installed on the top of the concentration tank (1) for mechanical stirring of the feed liquid. The low-pressure steam (11) is connected to the sterilizing filter (10-1) and the liquid outlet (1-5) respectively, and the steam can be used to sterilize the sterilizing filter (10-1) and the concentration tank (1), and can also heat the liquid in the tank. Through the above arrangement, it is possible to ensure that the liquid bacterial agent after fermentation is fully mixed in the concentration tank (1) through mechanical stirring and gas stirring, and the concentration tank can be sterilized by high-temperature steam before the fermentation liquid enters the concentration tank (1) and after the production is completed, to ensure that it will not be contaminated by miscellaneous bacteria.
[0020] Skid-mounted ultrafiltration membrane concentration device (with Figure 2 ) is an overall skid-mounted device composed of multiple devices, and is provided with multiple pipe openings for connection with the outside world. The lower part of the concentration tank (1) is provided with liquid outlets (1-5), which are connected to the skid-mounted membrane concentration device (attached) through pipelines. Figure 2), product filling port (12), and a ditch to a sewage treatment system (16). When the concentration is completed, the liquid bacterial agent can be filled through the product filling port (12) or transported to other places by filling the tank with compressed air (10) to maintain a certain micro-positive pressure in the tank. The cleaning wastewater after the production is completed can be discharged to the ditch to the sewage treatment system through (16). The liquid outlet (1-5) is connected to the inlet of the booster pump (3) through a pipeline. A pressure liquid level sensor (3-1) is provided on this section of the pipeline to measure the liquid level height in the concentration tank (1). The original biological bacteria dosage before the concentration starts can be automatically calculated through computer programming. At the same time, the booster pump (3) can be automatically stopped by setting the liquid level alarm value, thereby increasing the safety of the device operation. The outlet of the booster pump (3) is connected to the material inlet of the cooler (4). The cooler is a shell-and-tube heat exchanger. The cooling medium flows through the tube side and the material flows through the shell side. The cooling medium can use circulating cooling water or tap water. The cooling water inlet is connected to the tap water (14). The outlet is connected to the drainage pipe (15). The outlet is provided with an electric regulating valve (4-1). The material outlet is connected to the ultrafiltration membrane assembly (5). The material outlet is provided with a temperature sensor (4-2) for detecting the temperature of the liquid bacterial agent. The electric regulating valve (4-1) and the temperature sensor (4-2) are both connected to the automatic controller (8) through a circuit. The temperature and valve opening are automatically controlled through computer programming. When the temperature exceeds the set temperature, the electric regulating valve (4-1) is opened to cool the liquid bacterial agent through tap water. When the temperature is lower than the set temperature, the electric regulating valve (4-1) is closed. Since the ultrafiltration membrane assembly may cause material fatigue at high temperatures, resulting in a reduction in service life, and the liquid bacterial agent may release heat during the concentration process, causing the temperature to rise, the cooler (4), the electric regulating valve (4-1), and the temperature sensor (4-2) are provided to achieve automatic temperature control, thereby playing a protective role.
[0021] The ultrafiltration membrane assembly (5) is a device unit composed of a plurality of ultrafiltration membrane elements, a membrane shell, and a bracket. The number of ultrafiltration membrane elements in the membrane assembly can be set according to the required processing capacity. The ultrafiltration membrane elements are in parallel relationship. The more the number, the greater the processing capacity. The ultrafiltration membrane adopts a structure similar to a roll-type reverse osmosis membrane. The flat membrane and the grid are stacked together and rolled, and packaged into 4040 and 8040 type membrane elements commonly used in industry. The outer dimensions and connection method are consistent with the roll-type reverse osmosis, so the ultrafiltration membrane can be installed in a common pressure vessel on the market. The filter membrane uses a grid of a guide net with a corrugated structure. The corrugated grid size height has several specifications of 40-120mil. The inlet water is divided into multiple independent channels by these grids, and each channel is equivalent to a tubular membrane with a radius of 1-3mm. Such a unique structure ensures that the membrane packing density (membrane area) can be maintained while ensuring that a high influent suspended solid content (maximum influent SS can reach 10,000 mg / l) can be tolerated during operation, and allows cross-flow operation at a higher flow rate, thereby increasing shear force and alleviating membrane fouling. The outlet of the cooler (4) is connected to the liquid bacterial agent inlet of the ultrafiltration membrane assembly (5). The liquid biological bacterial agent is separated into concentrated liquid and clear liquid in the ultrafiltration membrane assembly (5). The effective biological bacterial agent is intercepted and connected to the concentrated liquid reflux port (1-4) of the concentration tank (1) through the concentrated liquid outlet (5-1) and the concentrated liquid reflux valve (5-4). The clear liquid is connected to the clear liquid inlet (6-1) of the clear liquid water tank (6) through the clear liquid outlet (5-2) at the end of the membrane assembly. A clear liquid flowmeter (9) and a clear liquid valve (5-3) are provided on this section of the pipeline. The clear liquid flow meter (9) can measure instantaneous flow and cumulative flow, and is connected to the automatic controller (8) through a circuit. The flow target value is set by computer programming. Before the concentration starts, the amount of clear liquid to be discharged is calculated according to the planned concentration multiple, and is input as the target value. When the cumulative flow of the clear liquid flow meter (9) reaches the target value, the automatic controller (8) controls the booster pump (3) to stop, realizing automatic concentration control, replacing the method of manually measuring the remaining concentrated liquid volume to calculate the concentration multiple, thereby improving the accuracy and convenience of production. During the concentration operation of the equipment, the clear liquid tank (6) always maintains the highest water level and is discharged into the ditch to the sewage treatment system through the clear liquid overflow port (6-5), so that the clear liquid can be temporarily stored. When backwashing is required, the temporarily stored clear liquid can be directly used for backwashing, saving tap water consumption.
[0022] Since the ultrafiltration membrane is prone to fouling and clogging during use, resulting in low production efficiency and even affecting the service life of the ultrafiltration membrane, the device is provided with two washing methods: backwashing and chemical cleaning. Backwashing is to use the concentrated clear liquid to reversely flush the ultrafiltration membrane assembly (5). This backwashing can be performed at any time when clogging occurs during each production process. It is simple to operate and is a relatively common method. Chemical cleaning is to thoroughly clean the ultrafiltration membrane assembly (5) after a certain batch of production is completed. By adding chemical agents, stubborn microorganisms attached to the device can be cleaned to maintain the flux of the ultrafiltration membrane. The backwashing and chemical cleaning functions are integrated inside the device. By setting a switching valve, three different functions of concentrated production, backwashing, and chemical cleaning can be realized. The clear liquid water tank (6) is used as a backwashing water tank when the ultrafiltration membrane assembly (5) is backwashed. The lower part of the clear liquid water tank (6) is provided with a No. 1 backwashing valve (6-2) and an emptying valve (6-3). The emptying valve (6-3) is in a normally closed state and is opened when the clear liquid water tank (6) needs to be emptied. The No. 1 backwash valve (6-2) is connected to the inlet of the backwash pump (7), and the outlet of the backwash pump is connected to the clear liquid outlet (5-2) at the end of the ultrafiltration membrane assembly (5) through the No. 2 backwash valve (7-1). The No. 1 backwash valve (6-2), the No. 2 backwash valve (7-1) and the backwash pump (7) are in a normally closed state. When the equipment is concentrated, the equipment will perform a backwash operation. At this time, the clear liquid valve (5-3) is closed, and the No. 1 backwash valve (6-2), the No. 2 backwash valve (7-1) and the backwash pump (7) are opened. The clear liquid in the cleaning tank is used to reversely backwash the ultrafiltration membrane assembly to wash away the particulate impurities attached to the membrane surface. The backwash water is discharged into the ditch through the backwash valve (7-2) to the sewage treatment system. Under such a setting, the ultrafiltration membrane assembly can be backwashed at any time to reduce the phenomenon of membrane fouling.
[0023] At the same time, the device also integrates a chemical cleaning system. The chemical cleaning tank (2) is connected to the inlet of the booster pump (3) through the first chemical cleaning valve (2-6) at the bottom, and the outlet of the booster pump (3) is connected to the chemical cleaning reflux port (2-4) at the top of the chemical cleaning tank (2) through the chemical cleaning reflux valve (2-9). The chemical cleaning port (2-3) is connected to the concentrated liquid outlet (5-1) of the ultrafiltration membrane assembly (5) through the second chemical cleaning valve (2-10). The pure water inlet (2-1) is connected to the pure water pipeline. The chemical cleaning tank drain valve (2-5) is connected to the drain ditch. An electric heater (2-7) and a temperature transmitter (2-8) are also provided in the tank. The chemical cleaning tank drain valve (2-5), the first chemical cleaning valve (2-6) and the second chemical cleaning valve (2-10) are in a normally closed state. When chemical cleaning is required, pure water is added to the tank until it is full, a chemical cleaning agent is added, the first chemical cleaning valve (2-6), the booster pump (3) and the chemical cleaning reflux valve (2-9) are opened, and the electric heater (2-7) is opened at the same time. The agent is fully dissolved through liquid heating and circulating stirring, and then the chemical cleaning reflux valve (2-9) is closed and the second chemical cleaning valve (2-10) is opened. The chemical cleaning liquid can be refluxed to the chemical cleaning tank (2) after passing through the ultrafiltration membrane assembly (5). The chemical cleaning liquid is repeatedly circulated to clean the microorganisms attached to the ultrafiltration membrane assembly (5) and other pollutants that are not easy to backwash. Such an arrangement can realize online chemical cleaning without the need to frequently remove the membrane, and the operation is convenient and the operation intensity is greatly reduced.
[0024] The device is equipped with an automatic controller (8), to which all instruments and power equipment in the device are connected via circuits. A PLC industrial automation processor is provided in the controller, and computer programming is used to realize functions such as reading of instrument detection data of the entire device, automatic start and stop of the equipment, parameter setting, data recording, and fault alarm, thereby realizing fully automatic, safe, and efficient operation of the device.
[0025] Except for the concentration tank (1), the rest of the equipment, pipelines and instruments of the whole device are integrated on a skid-mounted steel platform to form an attached Figure 2 The skid-mounted ultrafiltration membrane concentration device shown in the figure can save floor space and is easy to transport and install.
[0026] The device can achieve a processing capacity of 0.5-1.0m 3 / h bacteria-based environmental protection biological agent concentration, the maximum concentration multiple can reach 20 times, the entire device is made of 304 stainless steel. The total capacity of the concentration tank (1) is 5000L, the capacity of the chemical cleaning tank (2) is 300L, and the flow rate of the booster pump (3) is 40m 3 / h, head 50m, cooler (4) temperature control <35℃, ultrafiltration membrane assembly (5) uses 4 8040 roll ultrafiltration membranes, membrane shell is 8 inches two cores two branches, cleaning water tank (6) capacity 300L, backwash pump (7) flow 5m3 / h, head 17m, the automatic controller (8) adopts Siemens 1200 PLC processor, the human-machine interface adopts Siemens 12-inch touch screen, and the filtrate flowmeter (9) adopts electromagnetic flowmeter.
[0027] The biological agent is a periodic fermentation, and each fermentation cycle can produce 5000L of fermentation liquid, with a colony count of 10 8 CFU / mL. Before the end of fermentation, the concentration tank (1) is sterilized in advance, and the steam valve (11-1) is opened to introduce 0.55Mpa low-pressure steam provided by the outside into the tank. By adjusting the opening of the exhaust valve (16-1), the pressure in the tank is maintained at 0.5Mpa, and the temperature in the tank is raised to 121°C, and the temperature is controlled at 121°C for 30 minutes. While the tank body is being sterilized, the air filter steam valve (11-2) can be opened to sterilize the air filter (10-1). After the sterilization is completed, the tank needs to be naturally cooled to below 40°C, and all valves on the connecting pipeline of the compressed air inlet (1-2) are opened to introduce 0.3Mpa sterile compressed air provided by the outside into the tank. By adjusting the opening of the exhaust valve (16-1), the pressure in the tank is maintained at 0.05Mpa. The cooling time can be accelerated by air flow, and the positive pressure in the tank is maintained to prevent the entry of miscellaneous bacteria. After cooling to below 40°C, the fermented bacterial agent can be transported to the concentration tank (1) through the fermentation liquid inlet (1-1). The liquid level height in the tank can be detected by the pressure liquid level sensor (3-1), and the total volume of the bacterial agent at this time can be automatically calculated by the automatic controller (8), assuming that the bacterial dosage of the next batch production is 4000L.
[0028] Assume that the concentration target of this inoculum is 10 times, that is, the number of colonies increases from 10 8 CFU / mL is concentrated to 10 9 CFU / mL, the volume is concentrated from 4000L to 400L, and the solvent that needs to be separated is calculated to be 3600L. First, the concentration mode is operated, all the concentration-related valves are opened, and the valves related to backwashing, chemical cleaning, canning, cleaning and discharging are closed. The target value of the clear liquid flow meter (9) is 3600L, and the temperature of the temperature sensor (4-2) is 35°C on the touch screen of the human-machine interface of the automatic controller (8). The equipment operation mode is automatic operation, and the device is started. At this time, the agitator (2-6) and the booster pump (3) start to operate, and the liquid bacterial agent is concentrated from the concentration tank (1) through the booster pump (3) to the ultrafiltration membrane assembly (5). The concentrated liquid is returned to the concentration tank (1) from the concentrated liquid reflux port (1-4), and the clear liquid is discharged to the ditch and the sewage treatment system through the cleaning water tank (6). As the equipment runs, the amount of liquid in the concentration tank gradually decreases, and the concentration gradually increases. The instantaneous flow of the clear liquid flow meter (9) gradually decreases from high, and the cumulative flow gradually increases. When the cumulative flow value reaches the set target value of 3600L, the device automatically stops and the concentration ends.
[0029] After the concentration is completed and the product has passed the quality inspection, it can be canned. Close all the external valves of the concentration tank (1), introduce compressed air into the concentration tank, maintain the pressure in the tank at 0.05Mpa, open the product canning valve (12-1), and can it into the packaging barrel until all the concentrated bacterial agent products are canned. While the product is canned, the device backwash mode can be operated synchronously, close all the valves opened in the concentration mode, open the No. 1 backwash valve (6-2), No. 2 backwash valve (7-1) and the backwash pump (7), and use the clear liquid in the cleaning tank to reversely backwash the ultrafiltration membrane assembly to wash away the particulate impurities attached to the membrane surface. The backwash water is discharged into the ditch through the backwash valve (7-2) to the sewage treatment system.
[0030] If the production is carried out continuously, the next batch of concentrated production can be carried out. After a period of production or a certain batch, the output of the device decreases, or the device needs to be shut down for a long period of time, then the ultrafiltration membrane assembly (5) needs to be chemically cleaned. Add pure water (13) to the chemical cleaning tank (2), open the first chemical cleaning valve (2-6), the booster pump (3) and the second chemical cleaning valve (2-10), first use clean water to clean the residual bacterial agent in the device, and the cleaned water is discharged to the sewage treatment system through the drain valve (16-1) through the ditch. After repeated cleaning several times until the water is clear, a certain proportion of chemical cleaning agents, such as NaOH, citric acid, etc., can be added to the chemical cleaning tank (2). After the chemical agents are added, they need to be dissolved and stirred first, and the first chemical cleaning valve (16-1) is opened. The cleaning valve (2-6), the booster pump (3) and the chemical cleaning reflux valve (2-9) are turned on at the same time, and the electric heater (2-7) is turned on to fully dissolve the agent through liquid heating and circulating stirring. Then, the chemical cleaning reflux valve (2-9) is closed and the second chemical cleaning valve (2-10) is turned on to allow the chemical cleaning liquid to flow back to the chemical cleaning tank (2) after passing through the ultrafiltration membrane assembly (5). The chemical cleaning liquid is repeatedly circulated and cleaned for several hours to thoroughly clean the microorganisms and other pollutants attached to the ultrafiltration membrane assembly (5) that are not easy to backwash. After the cleaning is completed, all the agents in the device are emptied, and pure water is added again to infiltrate and protect the ultrafiltration membrane assembly so that it can be used for production next time.
[0031] The above is only a preferred specific implementation method of the utility model, but the protection scope of the utility model is not limited to it. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and utility model concept of the utility model within the technical scope disclosed by the utility model, which should be covered by the protection scope of the utility model.
Claims
1. A fully automatic biological agent ultrafiltration membrane concentration device, characterized in that: Specifically, it comprises: a concentration tank (1), a skid-mounted ultrafiltration membrane concentration device, compressed air (10), low-pressure steam (11), a product filling port (12), pure water (13), tap water (14), a drainage pipe (15), and a ditch-to-sewage treatment system (16); the skid-mounted ultrafiltration membrane concentration device comprises a chemical cleaning tank (2), a booster pump (3), a cooler (4), an ultrafiltration membrane assembly (5), a clear liquid water tank (6), a backwash pump (7), an automatic controller (8), and a clear liquid flow meter (9); The concentration tank (1) is provided with a plurality of connecting pipes or connecting ports, and the fermentation tank (17) is connected to the fermentation liquid inlet (1-1) on the concentration tank (1) through a pipeline; the compressed air (10) passes through a sterilizing filter (10-1) and is connected to the air inlet pipe (1-2) on the concentration tank (1), the air inlet pipe extends to the bottom of the concentration tank (1), and the air inlet pipe (1-2) is connected to a perforated annular pipe at the bottom of the concentration tank (1) to evenly distribute the air; the exhaust port (1-3) on the concentration tank (1) is connected to the outside through a pipeline, and a manual valve is provided on the pipeline; the concentrated liquid reflux port (1-4) on the concentration tank (1) is connected to the ultrafiltration membrane assembly (5) through a pipeline; the agitator (1-6) is installed on the top of the concentration tank (1); the low-pressure steam (11) is respectively connected to the sterilizing filter (10-1) and the liquid outlet (1-5) at the bottom of the concentration tank (1); At the same time, the liquid outlet (1-5) at the bottom of the concentration tank (1) is divided into three pipelines, one of which is connected to the product filling port (12), another is connected to the sewage treatment system (16) through the ditch, and the third is connected to the inlet of the booster pump (3) through a pipeline. A pressure type liquid level sensor (3-1) is provided on this connecting pipeline to measure the liquid level height in the concentration tank (1). The pressure type liquid level sensor (3-1) is electrically connected to the automatic controller (8); the cooler (4) is a shell and tube heat exchanger, the material goes through the shell side, and the cooling medium goes through the tube side. The cooling medium can use circulating cooling water or tap water; the outlet of the booster pump (3) is connected to the material inlet of the cooler (4), the material outlet is connected to the liquid bacterial agent inlet of the ultrafiltration membrane assembly (5), the material outlet is provided with a temperature sensor (4-2) for detecting the temperature of the liquid bacterial agent, the cooling medium inlet is connected to the tap water (14), the cooling medium outlet is connected to the drain pipe (15), the cooling medium outlet is provided with an electric regulating valve (4-1), the electric regulating valve (4-1) and the temperature sensor (4-2) are electrically connected. The concentrated liquid outlet (5-1) of the ultrafiltration membrane assembly (5) is connected to the concentrated liquid reflux port (1-4) of the concentration tank (1) via a concentrated liquid reflux valve (5-4); the clear liquid outlet (5-2) of the ultrafiltration membrane assembly (5) is connected to the clear liquid inlet (6-1) of the clear liquid water tank (6); a clear liquid flow meter (9) and a clear liquid valve (5-3) are provided on the connecting pipeline; the clear liquid flow meter (9) can measure instantaneous flow and cumulative flow, and is connected to the automatic controller (8) through a circuit , and the booster pump (3) is also electrically connected to the automatic controller (8); a clear liquid overflow port (6-5) is provided on the upper side of the clear liquid water tank (6) to connect to the ditch or sewage treatment system; two branches are provided at the lower part of the clear liquid water tank (6), which are respectively connected to the No. 1 backwash valve (6-2) and the emptying valve (6-3); the No. 1 backwash valve (6-2) is connected to the inlet of the backwash pump (7), and the outlet of the backwash pump (7) is connected to the clear liquid outlet (5-2) at the end of the ultrafiltration membrane assembly (5) through the No. 2 backwash valve (7-1); The chemical cleaning tank (2) is provided with a plurality of connection ports. The first chemical cleaning valve (2-6) at the lower part of the chemical cleaning tank (2) is connected to the inlet of the booster pump (3), and the outlet of the booster pump (3) is connected to the chemical cleaning reflux port (2-4) at the upper part of the chemical cleaning tank (2) through the chemical cleaning reflux valve (2-9); the chemical cleaning port (2-3) of the chemical cleaning tank (2) is connected to the concentrated liquid outlet (5-1) of the ultrafiltration membrane assembly (5) through the second chemical cleaning valve (2-10); the pure water inlet (2-1) of the chemical cleaning tank (2) is connected to the pure water (13) pipeline; the chemical cleaning tank (2) is also provided with a chemical cleaning tank drain valve (2-5) connected to the drain ditch; and an electric heater (2-7) and a temperature transmitter (2-8) are also provided in the tank; The concentrated liquid outlet (5-1) is also provided with a branch connected to a backwash valve (7-2).
2. A fully automatic biological agent ultrafiltration membrane concentration device according to claim 1, characterized in that: When the electric regulating valve (4-1) and the temperature sensor (4-2) are connected to the automatic controller (8) through a circuit, the automatic controller (8) can realize automatic control of the temperature and the valve opening through computer programming. When the temperature exceeds the set temperature, the electric regulating valve (4-1) opens to cool the liquid bacterial agent through tap water. When the temperature is lower than the set temperature, the electric regulating valve (4-1) closes.
3. A fully automatic biological agent ultrafiltration membrane concentration device according to claim 1, characterized in that: The clear liquid flow meter (9) and the booster pump (3) are electrically connected to the automatic controller (8). The automatic controller (8) can use computer programming to achieve flow target value setting. Before the concentration starts, the amount of clear liquid to be discharged is calculated according to the planned concentration multiple, and is input as the target value. When the accumulated flow of the clear liquid flow meter (9) reaches the target value, the automatic controller (8) controls the booster pump (3) to stop, thereby achieving automatic concentration control.
4. A fully automatic biological agent ultrafiltration membrane concentration device according to claim 1, characterized in that: The ultrafiltration membrane assembly (5) is a device unit composed of a plurality of ultrafiltration membrane elements, a membrane shell, and a bracket. The plurality of ultrafiltration membrane elements are connected in parallel. The greater the number, the greater the processing capacity. The ultrafiltration membrane adopts a structure similar to a roll-type reverse osmosis membrane, wherein a flat membrane and a grid are stacked together and rolled, and packaged into 4040 and 8040 membrane elements commonly used in industry. The outer dimensions and connection method are consistent with those of a roll-type reverse osmosis membrane, so that the ultrafiltration membrane can be installed in a common pressure vessel on the market. The ultrafiltration membrane uses a grid of a guide net with a corrugated structure, and the corrugated grid has several specifications of 40-120 mil in height.
5. A fully automatic biological agent ultrafiltration membrane concentration device according to claim 1, characterized in that: An automatic controller (8) is connected to all instruments and power equipment in the device through circuits. A PLC industrial automation processor is arranged in the controller, and computer programming is used to realize the reading of instrument detection data of the whole set of devices, automatic start and stop of equipment, parameter setting, data recording, and fault alarm functions, so as to realize the fully automatic, safe and efficient operation of the device.