A filtering device for separating broccoli peptides

Abstract

This invention relates to the field of broccoli peptide extraction technology and discloses a filtration device for separating broccoli peptides, comprising a base; a mixed liquid flow tube assembly located above the base, with the inlet end connected to an external feed pump and the outlet end connected to an external subsequent processing station; two sets of filtration pipelines internally arranged in parallel, connected by a connecting component, allowing each set of filtration pipelines to operate independently; and a deionized water flow tube assembly located above the base, used in conjunction with the mixed liquid flow tube assembly to filter the liquid, forming multiple operating modes. This invention, through the switching and coordination of three modes, can complete the backwashing and CIP cleaning maintenance of a single ultrafiltration membrane without stopping the overall filtration operation. This avoids the decrease in production efficiency caused by downtime maintenance and eliminates the need to directly discharge the liquid in the pipeline to be maintained, reducing liquid waste and helping to control production and processing costs.

Description

Technical Field

[0001] This invention relates to the field of broccoli peptide extraction technology, specifically to a filtration device for separating broccoli peptides. Background Technology

[0002] Broccoli peptides are small-molecule bioactive peptides extracted from broccoli. They possess various biological activities, including antioxidant and immunomodulatory effects, and have broad application prospects in the food and health product industries. The production and extraction process of broccoli peptides involves filtration to remove impurities from the extract and retain peptides of different molecular weights to obtain the target product with the required purity.

[0003] Existing broccoli peptide filtration equipment requires regular maintenance of the ultrafiltration membrane during use, such as backwashing and CIP. During maintenance, the feed pump must be stopped to stop the flow of the feed liquid or to discharge it directly. This not only affects the overall efficiency of the filtration operation but also wastes the feed liquid and increases production costs. In addition, after prolonged use, large molecules of broccoli peptides can easily remain on the surface of the ultrafiltration membrane. Some of the broccoli peptides will adhere to and embed in the membrane pores, and it is difficult to clean them completely with a single backwash. This will lead to a continuous decrease in the permeability of the ultrafiltration membrane, shorten the service life of the ultrafiltration membrane, and further increase the operation and maintenance costs of the equipment. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a filtration device for separating broccoli peptides. This device primarily solves the problems of stagnant or directly discharged feed liquid, which not only affects the overall efficiency of the filtration operation but also leads to feed liquid waste and increased production costs. It also addresses the issue of some broccoli peptides adhering to and embedding in the membrane pores, causing a continuous decrease in the permeability of the ultrafiltration membrane and shortening its lifespan.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A filtration device for separating broccoli peptides includes a base; a mixed liquid flow tube assembly located above the base, with its inlet end connected to an external feed pump and its outlet end connected to an external subsequent processing station; two sets of filtration pipelines are arranged in parallel internally, connected by a connecting component, and each set of filtration pipelines can operate independently; and a deionized water flow tube assembly located above the base, which works in conjunction with the mixed liquid flow tube assembly to filter the liquid and form multiple operating modes, while also providing deionized water for normal filtration of the ultrafiltration membrane.

[0006] Furthermore, the filter pipeline includes: Multiple sets of permeate filter tubes are fixedly installed on the base. The sets of permeate filter tubes are connected in series. The first set of permeate filter tubes is fixedly connected to a first three-way valve, and the last set of permeate filter tubes is fixedly connected to a bend connector. The fourth three-way valve is fixedly connected to the other end of the elbow joint, and one end of the fourth three-way valve is fixedly connected to the treatment liquid inlet pipe; The first connecting pipe has one end fixedly connected to one end of the first three-way valve and the other end fixedly connected to the second three-way valve. One end of the second three-way valve is fixedly connected to the cleaning fluid drain pipe. The second connecting pipe is fixedly connected at one end to one end of the first three-way valve.

[0007] Based on the aforementioned solution, the connectivity component includes: The third three-way valve is fixedly connected at both ends to the other ends of the two second connecting pipes; The four-way connector is fixedly connected to the last end of the third three-way valve, and the ports on both sides are respectively connected to the two second three-way valves; The first control valve is fixedly connected to the input end of the four-way connector, and the input end of the first control valve is fixedly connected to the liquid inlet pipe of the mixed liquid. The fifth three-way valve is fixedly connected between the two fourth three-way valves. The last end of the fifth three-way valve is fixedly connected to the second control valve, and the other end of the second control valve is fixedly connected to the mixed liquid outlet pipe.

[0008] As a further embodiment of the present invention, the permeation filtration tube assembly includes: The outer permeation tube has two sealed and fixed connections at both ends, with a T-connector at each end. Adjacent T-connectors are sealed and fixedly connected. The sealing plate is fixed to the end of the tee connector. The baffle is fixedly installed inside the tee connector to change the direction of liquid flow inside the tee connector.

[0009] Furthermore, the deionized water flowing through the pipe assembly includes: The inner permeation tube is coaxially installed inside the outer permeation tube of the permeation filter tube assembly and located between two baffles. An annular cavity for the flow of the mixed liquid is formed between the outer wall of the inner permeation tube and the inner wall of the outer permeation tube. The inner tube of the permeation tube has a corresponding installation groove for the filter membrane, and the filter membrane is sealed and installed inside the installation groove. The upper separatory tube is fixedly installed at the upper end of the permeation inner tube; The lower separator is fixedly installed at the lower end of the permeation inner tube.

[0010] Based on the aforementioned scheme, the multiple operating modes are of three types, corresponding to Mode 1, Mode 2 and Mode 3 respectively.

[0011] As a further embodiment of the present invention, in mode one: The first control valve is in the closed state, and the second control valve is in the regulating open state; The third three-way valve is in the state of connecting the two second connecting pipes; The fourth three-way valve on the maintenance side is in a state of connection with the treatment fluid inlet pipe; The fifth three-way valve is in the state of being connected to the permeate filter tube group on the operating side.

[0012] As a further embodiment of the present invention, in mode two: The first control valve is in the closed state, and the second control valve is in the regulating open state; The third three-way valve is in the state of connecting the two second connecting pipes; The fourth three-way valve on the maintenance side is in a state of connection with the treatment fluid inlet pipe; The fifth three-way valve is in the state of being connected to the permeate filter tube group on the operating side.

[0013] As a further embodiment of the present invention, in mode three: The first control valve is in the open state, and the second control valve is in the regulating open state; The third three-way valve is in a state of connection with the permeation filter tube group and the four-way connecting pipe head on the operating side; The fifth three-way valve is in the connected state with the permeate filter tube group and the second control valve on the operating side; The first three-way valve on the maintenance side is in a state of connection with the first connecting pipe and the permeation filter pipe group; The second three-way valve on the maintenance side is in a state of connection with the cleaning fluid drain pipe and the first connecting pipe.

[0014] Furthermore, the first mode is a dual-pipeline simultaneous operation mode; Mode 2 is a single-sided backwashing maintenance mode; Mode 3 is a single-sided CIP maintenance mode.

[0015] Compared with the prior art, the present invention provides a filtration device for separating broccoli peptides, which has the following beneficial effects: 1. This invention, through the switching and coordination of three modes, can complete the backwashing and CIP cleaning maintenance of a single ultrafiltration membrane without stopping the overall filtration operation. This avoids the decrease in production efficiency caused by downtime maintenance, and also eliminates the need to directly discharge the liquid in the pipeline to be maintained, reducing liquid waste and helping to control production and processing costs.

[0016] 2. This invention, in conjunction with CIP cleaning, can thoroughly dissolve and remove residual broccoli peptide impurities embedded in the membrane pores, preventing a continuous decline in the permeability of the ultrafiltration membrane, effectively extending the service life of the ultrafiltration membrane, and further reducing the operating and maintenance costs of the equipment.

[0017] 3. By setting Mode 2, this invention will not cause waste of material during backwashing, and the other side of the pipeline does not need to be stopped during maintenance, ensuring that the filtration operation can be carried out continuously and maintaining overall production efficiency.

[0018] 4. By setting up the bypass pipeline of the first connecting pipe, the present invention can realize bidirectional cleaning of the permeation filter tube group, completely solve the problem of dead corner residue in unidirectional cleaning, improve the thoroughness of CIP cleaning, ensure the cleaning and maintenance effect, and extend the service life of the ultrafiltration membrane. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of a filtration device for separating broccoli peptides proposed in this invention; Figure 2 This is a magnified schematic diagram of the mixed liquid flowing through the tube assembly in a filtration device for separating broccoli peptides according to the present invention; Figure 3 This is an enlarged schematic diagram of the mixed liquid flow through the inlet end of the pipe group in a filtration device for separating broccoli peptides according to the present invention. Figure 4 This is an enlarged schematic diagram of the mixed liquid flow through the outlet end of the pipe group in a filtration device for separating broccoli peptides according to the present invention. Figure 5 This is a magnified schematic diagram of the deionized water flowing through the pipe assembly in a filtration device for separating broccoli peptides according to the present invention. Figure 6 This is a cross-sectional schematic diagram of the permeation filter tube assembly of a filtration device for separating broccoli peptides according to the present invention. Figure 7 This invention provides a filtration device for separating broccoli peptides. Figure 6 A schematic diagram of the localized explosion structure; Figure 8 This is a schematic diagram of the normal operation pipeline flow structure of a filtration device for separating broccoli peptides proposed in this invention; Figure 9 This is a schematic diagram of the single-sided backwashing pipeline flow structure of a filtration device for separating broccoli peptides proposed in this invention; Figure 10 This is a schematic diagram of the CIP flushing pipeline flow structure of a filtration device for separating broccoli peptides proposed in this invention.

[0020] In the diagram: 1. Base; 2. Mixed liquid flows through the pipe assembly; 3. Deionized water flows through the pipe assembly; 201. Permeate filter assembly; 202. First three-way valve; 203. Bend joint; 204. First connecting pipe; 205. Second connecting pipe; 206. Second three-way valve; 207. Cleaning fluid drain pipe; 208. Mixed liquid inlet pipe; 209. Four-way connector; 210. Third three-way valve; 211. Fourth three-way valve; 212. Fifth three-way valve; 213. First control valve; 214. Second control valve; 215. Treatment fluid inlet pipe; 216. Mixed liquid outlet pipe; 20101. Permeation outer tube; 20102. T-joint connector; 20103. Sealing plate; 20104. Baffle plate; 301. Upper separator; 302. Filter membrane; 303. Lower separator; 304. Inner permeation tube; 305. Flow meter. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0022] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0024] Please see Figures 1-10As shown, a filtration device for separating broccoli peptides mainly consists of a base 1, a mixed liquid flow tube assembly 2, and a deionized water flow tube assembly 3, as detailed below: Both the mixed liquid flow through pipe assembly 2 and the deionized water flow through pipe assembly 3 are installed on the base 1. The inlet end of the mixed liquid flow through pipe assembly 2 is connected to an external feed pump, and the outlet end is connected to an external subsequent processing station, such as a collection station. The deionized water flows through the front end of pipe group 3 and is connected to an external deionized water supply device, which can supply deionized water for normal filtration of the ultrafiltration membrane. The mixed liquid flows through two sets of filter pipelines connected in parallel within pipe assembly 2. These two sets of filter pipelines are connected by a connecting component. Each set of filter pipelines can operate independently, and the operating mode can be adjusted as needed, such as: Mode 1: Normal operation (e.g.) Figure 8 As shown, the feed liquid is slowly pressurized and flows through the parallel filter pipes on both sides. After passing through the section where the deionized water flows through the pipe 3 and the filter pipe, small molecules (such as sodium ions) in the feed liquid are absorbed. Finally, the feed liquid is discharged from the outlet end and discharged from the filter pipe. The two pipes operate simultaneously to improve filtration efficiency and meet the needs of large-scale filtration production.

[0025] Mode 2: Single-sided backwashing maintenance mode (e.g.) Figure 9 As shown, when the ultrafiltration membrane of one set of filter lines needs backwashing, the valve can be switched to the maintenance mode of that set of lines, stopping the supply of feed liquid, increasing the pressure of deionized water flowing through line 3, and backwashing the ultrafiltration membrane to remove the broccoli peptides blocking the ultrafiltration membrane and return them to the feed liquid. Then, compressed inert gas is introduced from the end of the current backwashed filter line to allow the feed liquid in the current filter line to enter the filter line on the other side. During this process, the filter line on the other side can maintain normal filtration operation without the need for a complete shutdown, ensuring continuous filtration.

[0026] Mode 3: Single-sided CIP maintenance mode (e.g.) Figure 10 As shown in the diagram, when CIP is required on the ultrafiltration membrane of one set of filter lines, repeat the operation in Mode 2, drain the liquid in the current filter line, then switch the valve to change the medium channel of the filter line, and introduce cleaning solution (alkaline or acidic cleaning agent can be used, adjusted according to the actual contamination situation) from the rear end of the filter line to clean the ultrafiltration membrane, dissolve the residual broccoli peptides embedded in the membrane pores, and thoroughly clean the ultrafiltration membrane. During this process, the other set of filter lines continues to operate normally without the need for a complete shutdown. After cleaning one set, switch to the other set for cleaning. There is no need to drain the liquid in the line from the equipment, avoiding waste of liquid and not interrupting the continuity of filtration operation, effectively improving the overall efficiency of filtration operation and reducing production costs.

[0027] By switching between three modes, backwashing and CIP cleaning of a single ultrafiltration membrane can be completed without stopping the overall filtration operation. This avoids the decrease in production efficiency caused by downtime maintenance and eliminates the need to directly discharge the liquid in the pipeline to be maintained, reducing liquid waste and helping to control production and processing costs. At the same time, CIP cleaning can thoroughly dissolve and remove residual broccoli peptide impurities embedded in the membrane pores, preventing a continuous decline in ultrafiltration membrane permeability, effectively extending the service life of the ultrafiltration membrane, and further reducing the operating and maintenance costs of the equipment.

[0028] Furthermore, the mixed liquid flows through the pipe assembly 2, which consists of multiple sets of permeation filter pipe assemblies 201, a first three-way valve 202, a bend connector 203, a first connecting pipe 204, a second connecting pipe 205, a second three-way valve 206, a cleaning fluid drain pipe 207, a mixed liquid inlet pipe 208, a four-way connecting pipe head 209, a third three-way valve 210, a fourth three-way valve 211, a fifth three-way valve 212, a first control valve 213, a second control valve 214, a treatment fluid inlet pipe 215, and a mixed liquid outlet pipe 216. Among them, the first three-way valve 202, the second three-way valve 206, the third three-way valve 210, the fourth three-way valve 211, and the fifth three-way valve 212 are all electric three-way ball valves (T-type three-way valves), which can automatically switch the pipeline path through an external electrical control system; the first control valve 213 and the second control valve 214 are electric shut-off valves, which can control the opening and closing of the pipeline through an external electrical control system, making it convenient to adjust the operating mode and meet the path requirements under different operating conditions; Multiple sets of permeate filter tubes 201, a first three-way valve 202, a bend connector 203, a first connecting pipe 204, a second connecting pipe 205, a second three-way valve 206, a cleaning fluid drain pipe 207, a fourth three-way valve 211, and a treatment fluid inlet pipe 215 together constitute the filter pipeline, as detailed below: Multiple sets of permeation filter tubes 201 are connected in series on the top of the base 1. The mixed liquid inlet pipe 208 is fixedly connected to the input end of the first control valve 213 and connected to the external feed pump. The output end of the first control valve 213 is fixedly connected to the input end of the four-way connecting pipe head 209. The ports on both sides of the four-way connecting pipe head 209 are respectively connected to two second three-way valves 206. A third three-way valve 210 is fixedly installed at the tail end of the four-way connecting pipe 209. The third three-way valve 210 is connected to the first three-way valve 202 through the second connecting pipe 205. At the same time, the second three-way valve 206 is connected to the other end of the first three-way valve 202 through the first connecting pipe 204. The last end of the second three-way valve 206 is fixedly connected to the cleaning fluid drain pipe 207. The last output end of the first three-way valve 202 is connected to the foremost permeation filter tube group 201, and the last end of the permeation filter tube group 201 is fixedly connected to the elbow joint 203, and the other end of the elbow joint 203 is fixedly connected to the fourth three-way valve 211. A fifth three-way valve 212 is fixedly connected between the two fourth three-way valves 211. The other end of the fourth three-way valve 211 is fixedly connected to the processing liquid inlet pipe 215. The last end of the fifth three-way valve 212 is fixedly connected to the second control valve 214. The other end of the second control valve 214 is fixedly connected to the mixed liquid outlet pipe 216, which is connected to the subsequent processing station.

[0029] In Mode 1, the first control valve 213 is in the open state, and the second control valve 214 is in the adjustable open state (e.g., opening degree 10%, set according to actual needs), so that the entire mixture flows through the pipe assembly 2 with a stable pressure (a pressure gauge can be installed on the pipeline to read the pressure in the pipeline). The second three-way valve 206 and the four-way connecting pipe head 209 are in the closed state, the third three-way valve 210 and the fifth three-way valve 212 are both in the three-way connected state, the first three-way valve 202 is in the state of being connected to the second connecting pipe 205 and the permeation filter pipe assembly 201, and the fourth three-way valve 211 is in the state of being connected to the fifth three-way valve 212 and the elbow joint 203. The broccoli peptide extract mixture delivered by the feed pump enters the four-way connector 209 through the mixture inlet pipe 208, and then is diverted by two second three-way valves 206 into the permeation filter pipe groups 201 on both sides. After filtration, the filtered liquids from both sides flow into the corresponding fourth three-way valves 211 through the bend joints 203, and finally converge through the fifth three-way valve 212 and are discharged from the mixture outlet pipe 216 through the second control valve 214, completing the normal filtration operation. The pipelines on both sides work simultaneously to ensure the efficiency of the filtration process.

[0030] In mode two, adjust the valve direction of the third three-way valve 210, the fifth three-way valve 212 and the corresponding fourth three-way valve 211, and at the same time close the first control valve 213, so that the third three-way valve 210 only connects the two sides of the permeation filter tube group 201, the fourth three-way valve 211 connects to the treatment liquid inlet pipe 215, and the fifth three-way valve 212 connects to the single-sided operating permeation filter tube group 201, blocking the mixed liquid from entering the permeation filter tube group 201 on the side to be maintained; Subsequently, high-pressure inert gas is introduced through the corresponding liquid inlet pipe 215, pushing the residual liquid in the pipeline to be maintained through the first three-way valve 202 and the second connecting pipe 205 into the third three-way valve 210, and finally into the normally operating pipeline on the other side for filtration. This avoids waste of liquid, and the pipeline on the other side does not need to be stopped during the maintenance process, ensuring that the filtration operation can be carried out continuously and maintaining overall production efficiency.

[0031] In Mode 3, the valve routes of the third three-way valve 210, the fifth three-way valve 212, and the corresponding first three-way valve 202 and second three-way valve 206 are adjusted so that the third three-way valve 210 and the fifth three-way valve 212 are only connected to the permeate filter assembly 201 on the operating side, and no longer connected to the permeate filter assembly 201 on the maintenance side. Simultaneously, the first three-way valve 202 is connected to the first connecting pipe 204, and the second three-way valve 206 is connected to the cleaning fluid drain pipe 207.

[0032] Then, the cleaning fluid can be introduced through the treatment fluid inlet pipe 215 and flow in reverse through the permeation filter tube group 201 to complete the CIP cleaning. The waste liquid after cleaning is directly discharged from the equipment through the cleaning fluid drain pipe 207. After maintenance, the valve direction can be switched back to restore the normal filtration operation of the pipeline on this side. The same operation can then be used to maintain the pipeline on the other side, making the operation flexible and convenient.

[0033] In addition, the bypass pipeline of the first connecting pipe 204 enables bidirectional cleaning of the permeation filter assembly 201, completely solving the problem of dead corner residue in unidirectional cleaning, improving the thoroughness of CIP cleaning, ensuring the cleaning and maintenance effect, and extending the service life of the ultrafiltration membrane; at the same time, it can also add additional equipment, such as a secondary feed pump, to provide more options for the flow of the feed liquid.

[0034] When a secondary feed pump is added, internal circulation of the dual-sided filter pipeline can be achieved, allowing the liquid to circulate and be transported between the two sets of filter pipelines, thus adding an additional mode.

[0035] As a further explanation of Modes 2 and 3, the backwashing and CIP cleaning of the filter pipelines on both sides are operated alternately. When maintaining one side, the other side always maintains normal filtration operation. There is no need to shut down the whole machine, which will not interrupt the continuity of production or cause waste of liquid discharge, effectively ensuring production efficiency and controlling processing costs.

[0036] Furthermore, the permeation filtration tube assembly 201 consists of a permeation outer tube 20101, a three-way connector 20102, a sealing plate 20103, and a baffle 20104. The two three-way connectors 20102 are respectively sealed and fixed at both ends of the permeation outer tube 20101, and the two adjacent three-way connectors 20102 are sealed and fixedly connected. Deionized water flows through the tube assembly 3, passes through the permeation outer tube 20101 and the three-way connector 20102, and performs ultrafiltration inside the permeation outer tube 20101. The sealing plate 20103 is fixed to the end of the tee connector 20102 to seal the permeation tube 20101 and the tee connector 20102; The baffle 20104 is fixedly installed inside the tee connector 20102, which changes the tee connector 20102 into a downward bend, allowing the mixture to flow better inside the tee connector 20102.

[0037] Furthermore, the deionized water flows through pipe assembly 3, which consists of an upper dispensing pipe 301, a filter membrane 302 (an ultrafiltration membrane), a lower dispensing pipe 303, a permeation inner pipe 304, and a flow meter 305, as detailed below: The inner permeation tube 304 is coaxially disposed inside the outer permeation tube 20101 of the permeation filter tube assembly 201 and located between two baffles 20104. An annular cavity for the flow of mixed liquid is formed between the outer wall of the inner permeation tube 304 and the inner wall of the outer permeation tube 20101. The inner permeation tube 304 has a corresponding installation groove for the filter membrane 302. The filter membrane 302 is sealed and installed inside the installation groove. The top and bottom ends of the inner permeation tube 304 are respectively connected to the upper distribution pipe 301 and the lower distribution pipe 303. The upper distribution pipe 301 is connected to an external deionized water supply device. A flow meter 305 (which can be a rotor flow meter, electromagnetic flow meter, turbine flow meter, etc., preferably a turbine flow meter) is installed at the end of the lower distribution pipe 303. The flow meter can identify the flow rate of deionized water, thereby detecting the permeation status of the ultrafiltration membrane. During the filtration process, deionized water flows inside the permeation inner tube 304, while the mixed liquid flows in the annular cavity outside the permeation inner tube 304. Under the action of osmotic pressure, small molecule impurities in the mixed liquid will pass through the filter membrane 302 and enter the permeation inner tube 304, and be discharged with the deionized water, while broccoli peptides are retained in the mixed liquid in the annular cavity, thus completing the separation and purification of broccoli peptides.

[0038] As a further explanation of the detection of ultrafiltration membrane permeation, Based on the known ultrafiltration membrane area, through flux formula in It is the liquid volume flow rate (L / h). It is the membrane area (m²).

[0039] The flow rate in the lower separatory tube 303 is obtained.

[0040] An initial flux (or water flux, measured with clean water) is determined during the initial operation (or after cleaning). During operation (after the flow rate stabilizes, typically after 10-15 minutes of operation), the current flux is periodically measured to monitor contamination levels. The flux recovery rate is then used to assess this. Recovery rate (%) = (Post-contamination flux / Initial pure water flux) x 100% It can intuitively determine the degree of fouling of ultrafiltration membranes, making it easier for staff to arrange maintenance work in a timely manner and avoiding problems such as decreased filtration effect and unstable production quality caused by untreated ultrafiltration membrane fouling.

[0041] When the flux drops to the set threshold, maintenance work on the corresponding pipeline can be arranged, and the operation can be carried out in mode two or mode three as described above to ensure that the equipment is always in a stable filtration operation state.

[0042] The following is the operating principle of this invention: Before filtration begins, deionized water is introduced into the deionized water flow pipe group 3. Once the entire equipment pipeline is running stably, the initial flow rate is measured and recorded. Then start the feed pump to deliver the pre-extracted broccoli peptide mixture to the equipment. Depending on the production scale, choose whether to open the pipelines on both sides. For small-scale production, only one side can be operated. For large-scale production, open the pipelines on both sides to enter mode one for filtration. During the filtration process, the flow rate of the filter pipelines on both sides is monitored regularly. When the flow rate of one pipeline drops to the set maintenance threshold or reaches the regular maintenance time (30-60 minutes), the valve is switched to backwash the pipeline on that side in mode two. After the backwash is completed, the system is switched back to mode one to continue operation and monitor the flow rate. If the flow rate cannot be restored to the acceptable range after backflushing, switch the corresponding side pipeline to mode three for CIP cleaning.

[0043] In addition, multiple devices can be interconnected, that is, the liquid inlet pipe 208 and the liquid outlet pipe 216 can be connected. The front end can remove large molecules, retaining only molecules with a molecular weight of less than 1000 Daltons. The last device can also remove sodium ions and most inorganic salt ions, resulting in a broccoli peptide product with higher purity. It can be flexibly combined and installed to adapt to different production needs, making it more adaptable and able to meet the broccoli peptide separation and purification production operations of different processing scales and different purity requirements.

[0044] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0045] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A filtration device for separating broccoli peptides, characterized in that, include: Base (1); The mixed liquid flows through the pipe assembly (2), which is located above the base (1). The inlet end is connected to the external feed pump, and the outlet end is connected to the external subsequent processing station. Two sets of filter pipes are connected in parallel inside. The two sets of filter pipes are connected by a connecting component. The two sets of filter pipes can be operated independently. Deionized water flows through the pipe assembly (3), which is located above the base (1). It works in conjunction with the mixed liquid flowing through the pipe assembly (2) to filter the liquid and forms multiple operating modes. At the same time, it provides deionized water for the normal filtration of the ultrafiltration membrane.

2. The filtration device for separating broccoli peptides according to claim 1, characterized in that, The filter pipeline includes: Multiple sets of permeation filter tubes (201) are fixedly installed on the base (1). The multiple sets of permeation filter tubes (201) are connected in series. The first three-way valve (202) is fixedly connected to the first end of the permeation filter tube group (201), and the last end of the permeation filter tube group (201) is fixedly connected to the elbow joint (203). The fourth three-way valve (211) is fixedly connected to the other end of the elbow joint (203), and one end of the fourth three-way valve (211) is fixedly connected to the treatment liquid inlet pipe (215). The first connecting pipe (204) has one end fixedly connected to one end of the first three-way valve (202) and the other end fixedly connected to the second three-way valve (206). One end of the second three-way valve (206) is fixedly connected to the cleaning fluid drain pipe (207). The second connecting pipe (205) is fixed at one end to one end of the first three-way valve (202).

3. The filtration device for separating broccoli peptides according to claim 2, characterized in that, The connectivity component includes: The third three-way valve (210) is fixedly connected at both ends to the other ends of the two second connecting pipes (205); The four-way connector (209) is fixedly connected to the last end of the third three-way valve (210), and the ports on both sides are respectively connected to the two second three-way valves (206); The first control valve (213) is fixedly connected to the input end of the four-way connector (209), and the input end of the first control valve (213) is fixedly connected to the liquid inlet pipe (208). The fifth three-way valve (212) is fixedly connected between the two fourth three-way valves (211). The last end of the fifth three-way valve (212) is fixedly connected to the second control valve (214), and the other end of the second control valve (214) is fixedly connected to the mixed liquid outlet pipe (216).

4. The filtration device for separating broccoli peptides according to claim 2, characterized in that, The permeation filter assembly (201) includes: The outer permeation tube (20101) has two ends sealed and fixedly connected to a three-way connector (20102), and two adjacent three-way connectors (20102) are sealed and fixedly connected. The sealing plate (20103) is fixed to the end of the tee connector (20102); The baffle (20104) is fixedly installed inside the tee connector (20102) to change the flow direction of the liquid inside the tee connector (20102).

5. The filtration device for separating broccoli peptides according to claim 4, characterized in that, The deionized water flows through the pipe assembly (3), which includes: The inner permeation tube (304) is coaxially disposed inside the outer permeation tube (20101) of the permeation filter tube assembly (201) and located between two baffles (20104). An annular cavity for the flow of the mixed liquid is formed between the outer wall of the inner permeation tube (304) and the inner wall of the outer permeation tube (20101). The inner permeation tube (304) has a corresponding mounting groove for the filter membrane (302) on its wall, and the filter membrane (302) is sealed and installed inside the mounting groove; The upper liquid distribution tube (301) is fixedly installed at the upper end of the permeation inner tube (304); The lower dispensing tube (303) is fixedly installed at the lower end of the permeation inner tube (304).

6. The filtration device for separating broccoli peptides according to claim 3, characterized in that, The various operating modes are of three types, corresponding to Mode 1, Mode 2 and Mode 3 respectively.

7. The filtration device for separating broccoli peptides according to claim 6, characterized in that, In the first mode: The first control valve (213) is in the open state, and the second control valve (214) is in the regulating open state; The second three-way valve (206) and the four-way connecting pipe head (209) are in the closed state; Both the third three-way valve (210) and the fifth three-way valve (212) are in a state where all three sides are connected; The first three-way valve (202) is in the state of being connected to the second connecting pipe (205) and the permeation filter pipe group (201); The fourth three-way valve (211) is in the state of being connected to the fifth three-way valve (212) and the elbow joint (203).

8. The filtration device for separating broccoli peptides according to claim 6, characterized in that, In mode two: The first control valve (213) is in the closed state, and the second control valve (214) is in the regulating open state; The third three-way valve (210) is in the state of connecting the two second connecting pipes (205); The fourth three-way valve (211) on the maintenance side is in a state of connection with the treatment fluid inlet pipe (215); The fifth three-way valve (212) is in a state of connection with the permeation filter tube group (201) on the operating side.

9. The filtration device for separating broccoli peptides according to claim 6, characterized in that, In Mode 3: The first control valve (213) is in the open state, and the second control valve (214) is in the regulating open state; The third three-way valve (210) is in a state of connection with the permeation filter tube group (201) and the four-way connecting pipe head (209) on the operating side; The fifth three-way valve (212) is in a state of connection with the permeation filter tube group (201) and the second control valve (214) on the operating side; The first three-way valve (202) on the maintenance side is in a state of connection with the first connecting pipe (204) and the permeation filter pipe group (201); The second three-way valve (206) on the maintenance side is in a state of connection with the cleaning fluid drain pipe (207) and the first connecting pipe (204).

10. A filtration device for separating broccoli peptides according to claim 6, characterized in that, The first mode is a dual-pipeline simultaneous operation mode; Mode 2 is a single-sided backwashing maintenance mode; Mode 3 is a single-sided CIP maintenance mode.

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