Extended ultrafiltration integrated equipment and water treatment process

Abstract

The application provides an extended ultrafiltration integrated device, which comprises a control integrated box, extended membrane boxes and a back cover; the control integrated box is connected with the extended membrane boxes, the extended membrane boxes are multiple and are connected in sequence; the back cover is arranged on the side of the extended membrane box far from the control integrated box; the device further comprises a water inlet pipe, a backwashing discharge pipe, a concentrated water discharge pipe and a water production pipe; a membrane column is arranged in each of the extended membrane boxes; the membrane column is provided with a water inlet, a concentrated water outlet and a water production outlet; the water inlet is communicated with the water inlet pipe and the backwashing discharge pipe through a water inlet multi-way valve; the concentrated water outlet is communicated with the concentrated water discharge pipe and the backwashing discharge pipe through a concentrated water multi-way valve; the water production outlet is communicated with the water production pipe through a water production automatic valve; the control integrated box is connected with the extended membrane boxes and the multiple extended membrane boxes through the water inlet pipe, the backwashing discharge pipe, the concentrated water discharge pipe and the water production pipe. The device can realize endogenous backwashing and does not need an external water source for membrane column backwashing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ultrafiltration membrane assembly, in particular to an extended ultrafiltration integrated equipment and water treatment process. BACKGROUND

[0002] Ultrafiltration membrane technology is a very mature technology in water treatment applications, and the ultrafiltration integrated equipment for specific application sites also exists widely and achieves good results. However, the current ultrafiltration integrated equipment is one-off complete and fixed in size, and is manufactured and used. For some application sites that need to be adjusted due to capacity improvement, or newly added complete and fixed equipment, the overlap and waste of related supporting devices will be formed, or the new equipment will be replaced and discarded, which will cause considerable waste of resources and loss of funds.

[0003] The traditional integrated equipment is one-off integrally designed and manufactured for control system, power system and membrane rack, and cannot support later capacity expansion. The patent No. CN106334448A discloses a high-integration ultrafiltration membrane equipment, which integrates multiple membrane columns through a water inlet main pipe, a clean water main pipe and a concentrated water main pipe. When the equipment is backwashed, an external water source is needed for flushing, and the backwashing cannot be performed automatically. SUMMARY

[0004] Therefore, the present application provides an extended ultrafiltration integrated equipment and water treatment process which can realize automatic backwashing.

[0005] The technical scheme of the present application is implemented as follows: first, the present application provides an extended ultrafiltration integrated equipment, which comprises a control integrated box, an extended membrane box and a rear cover; the control integrated box is connected with the extended membrane box, the extended membrane box has multiple and is connected in sequence; the rear cover is arranged on the side of the extended membrane box away from the control integrated box; and the extended ultrafiltration integrated equipment further comprises a water inlet pipe, a backwashing discharge pipe, a concentrated water discharge pipe and a water production pipe,

[0006] Each of the extended membrane boxes is provided with a membrane column, the membrane column is provided with a water inlet, a concentrated water outlet and a water production outlet, the water inlet is communicated with the water inlet pipe and the backwashing discharge pipe through a water inlet multi-way valve, the concentrated water outlet is communicated with the concentrated water discharge pipe and the backwashing discharge pipe through a concentrated water multi-way valve, and the water production outlet is communicated with the water production pipe through a water production automatic valve; the control integrated box and the extended membrane box, and the multiple extended membrane boxes are connected through the water inlet pipe, the backwashing discharge pipe, the concentrated water discharge pipe and the water production pipe.

[0007] On the basis of the above technical scheme, preferably, the control integrated box and each of the extended membrane boxes are internally provided with the water inlet pipe, the backwashing discharge pipe, the concentrated water discharge pipe and the water production pipe; the control integrated box and the extended membrane box, and the water inlet pipe, the backwashing discharge pipe, the concentrated water discharge pipe and the water production pipe of the adjacent two extended membrane boxes correspond to each other and are connected.

[0008] On the basis of the above technical scheme, preferably, the water inlet pipe, the concentrated water discharge pipe, the backwashing discharge pipe and the water production pipe are respectively provided with female joints and male joints at two ends, the male joints are matched with the female joints and are threadedly connected; the control integrated box and the plurality of the extended membrane boxes are sequentially connected through the female joints and the male joints.

[0009] On the basis of the above technical scheme, preferably, the female joint comprises a female joint body, outer sides of two ends of the female joint body are respectively provided with first outer threads, the male joint comprises a male joint body, an outer side of a middle part of the male joint body is provided with a thread cover matched with the first outer threads, an outer side of one end is provided with second outer threads, and an outer side of the other end is provided with a sealing ring; one end of the male joint close to the sealing ring is embedded into one end of the female joint body, and the thread cover is threadedly connected with the first outer threads; the second outer threads and the first outer threads of one end of the female joint body are threadedly connected with the water inlet pipe, the concentrated water discharge pipe, the backwashing discharge pipe and the water production pipe of the extended membrane box or the control integrated box.

[0010] On the basis of the above technical scheme, preferably, the control integrated box is provided with a controller and a display screen, the display screen is connected with the controller, and the water inlet multi-way valve, the concentrated water multi-way valve and the water production automatic valve in the plurality of the extended membrane boxes are electrically connected with the controller.

[0011] On the basis of the above technical scheme, preferably, the control integrated box is further provided with a filter, a frequency converter, a booster pump, a flow sensor, a concentrated water proportional valve, a water production proportional valve and a first pressure sensor which are electrically connected with the controller; the filter and the booster pump are arranged on the water inlet pipe in the control integrated box, the flow sensor and the concentrated water proportional valve are arranged on the concentrated water discharge pipe in the control integrated box, and the water production proportional valve and the first pressure sensor are arranged on the water production pipe in the control integrated box; the frequency converter is connected between the controller and the booster pump and is electrically connected with the booster pump.

[0012] On the basis of the above technical scheme, preferably, the control integrated box is further provided with a low-voltage switch and a high-voltage switch which are electrically connected with the controller, the low-voltage switch is arranged on the water inlet pipe in the control integrated box and is close to the booster pump, and the high-voltage switch is arranged on the water production pipe in the control integrated box and is close to the first pressure sensor.

[0013] On the basis of the above technical scheme, preferably, each of the extended membrane boxes is provided with a voltage stabilizer and a second pressure sensor, the voltage stabilizer and the second pressure sensor are electrically connected with the controller, and the second pressure sensor is arranged on the water inlet pipe, the concentrated water discharge pipe, the backwashing discharge pipe and the water production pipe in the extended membrane box.

[0014] Secondly, the application provides a water treatment process of the extended ultrafiltration integrated equipment, which comprises the following steps:

[0015] S11, during operation, the water is introduced into the water inlet interface of the control integrated box, enters the booster pump for pressure boosting, and then is introduced into the membrane column by the water inlet multi-way valve of each extended membrane box to start filtration;

[0016] S12, the concentrated liquid after filtration is guided to the concentrated water discharge pipe by the concentrated water multi-way valve of each extended membrane box, and the flow sensor controls the opening degree of the concentrated water proportional valve to control the discharge amount of the concentrated water at a proper value according to parameters.

[0017] S13, the produced liquid during filtration is guided to the water production total by the water production automatic valve of each extended membrane box, and is transported to the water use point by the external pipe; when the water use point is full or stops using water, the equipment stops when the pressure of the water production pipe rises to the setting value of the high-pressure switch; when the water use point uses water again, the pressure is unloaded, and the equipment is restarted.

[0018] S14, when the membrane filaments of the membrane column are blocked, the membrane column needs to be backwashed.

[0019] On the basis of the above technical scheme, preferably, the backwashing method comprises the following steps:

[0020] S21, backwash upper row: other extended membrane boxes are normally operated, the water production automatic valve of the cleaning extended membrane box is opened, the concentrated water multi-way valve is guided to the backwash discharge pipe, the first pressure sensor and the water production proportional valve control the water production pressure at 1.0-1.2 bar, the other extended membrane boxes are used to backwash the cleaning extended membrane box for 1 second, and then the valves are closed.

[0021] S22, backwash lower row: other extended membrane boxes are normally operated, the water production automatic valve of the cleaning extended membrane box is opened, the water inlet multi-way valve is guided to the backwash discharge pipe, the first pressure sensor and the water production proportional valve control the water production pressure at 1.0-1.2 bar, the other extended membrane boxes are used to backwash the cleaning extended membrane box for 40-60 seconds, and then the valves are closed.

[0022] The extended ultrafiltration integrated equipment has the following beneficial effects compared with the prior art:

[0023] (1) The membrane column in the extended membrane box is connected to the water inlet pipe, the backwash discharge pipe, the concentrated water discharge pipe and the water production pipe by the water inlet multi-way valve, the concentrated water multi-way valve and the water production automatic valve, so that the membrane column in other extended membrane boxes provides water for backwashing, the backwashing is realized, and no external water source is needed for the membrane column backwashing.

[0024] (2) The whole device integrates filtration and backwashing, and each extended membrane box is independently designed, so that the extended membrane boxes are in a completely independent parallel relationship, do not interfere with each other during operation, and support direct extension.

[0025] (3) Expansion time only need to connect the expansion film box through the pipeline interface and line interface to be expanded, through a control integrated box control the whole integrated equipment operation, has the advantages of convenient operation, high integration.

[0026] (4) Low-voltage switch has the function of water shortage protection, water stop; high-voltage switch has the function of full water protection, full water shutdown, high-voltage switch and low-voltage switch have protection integrated device, avoid invalid operation.

[0027] (5) The present application has a plurality of expansion film box, when running, there is a problem of unstable voltage, by setting voltage stabilizer in each expansion film box, protect the stability of equipment operation.

[0028] (6) By setting the second pressure sensor on the water inlet pipe, backwash discharge pipe, concentrated water discharge pipe and water production pipe in each expansion film box, when the pressure in the pipe exceeds the set value, it means that the expansion film box operation has a problem, the control device will close the water inlet multi-way valve, concentrated water multi-way valve and water production automatic valve of the expansion film box, without affecting the operation of other expansion film boxes. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creating any creative labor.

[0030] Figure 1 It is the external structure diagram of the expansion type ultrafiltration integrated equipment of the present application;

[0031] Figure 2 It is the internal structure diagram of the expansion type ultrafiltration integrated equipment of the present application;

[0032] Figure 3 It is the internal pipeline diagram of the expansion type ultrafiltration integrated equipment of the present application;

[0033] Figure 4 It is the external structure diagram of the female connector of the expansion type ultrafiltration integrated equipment of the present application;

[0034] Figure 5 It is the external structure diagram of the female connector of the expansion type ultrafiltration integrated equipment of the present application;

[0035] Figure 6 It is the transverse sectional view of the female connector of the expansion type ultrafiltration integrated equipment of the present application.

[0036] In the figure, 1-control integrated box, 2-expanded membrane box, 3-back cover, 4-water inlet pipe, 5-backwash discharge pipe, 6-concentrated water discharge pipe, 7-water production pipe, 8-membrane column, 81-water inlet, 82-concentrated water outlet, 83-water production outlet, 84-water inlet multi-way valve, 85-concentrated water multi-way valve, 86-water production automatic valve, 9-female connector, 10-male connector, 91-female connector body, 92-first external thread, 101-male connector body, 102-threaded ring cover, 103- Second external thread, 104-groove, 105-sealing ring, 111-controller, 112-display screen, 113-filter, 114-frequency converter, 115-boosting pump, 116-flow sensor, 117-concentrated water proportional valve, 118-produced water proportional valve, 119-first pressure sensor, 120-low pressure switch, 121-high pressure switch, 11-pipeline interface, 12-line interface, 13-parallel line, 21-pressure regulator, 22-second pressure sensor. DETAILED DESCRIPTION

[0037] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] like Figure 1 As shown, combined Figures 2-6 The expanded ultrafiltration integrated equipment of the present invention includes a control integration box 1, an expanded membrane box 2, and a rear cover 3. The control integration box 1 is connected to the expanded membrane box 2, and there are multiple expanded membrane boxes 2, which are connected in sequence. The control integration box 1 and the expanded membrane box 2 are both rectangular boxes, and the control integration box 1 and the expanded membrane box 2, as well as the multiple expanded membrane boxes 2, are connected together by bolts. The rear cover 3 is located on the side of the expanded membrane box 2 away from the control integration box 1, that is, on the side of the last expanded membrane box 2.

[0039] A membrane column 8 is provided in each extended membrane box 2. A water inlet 81 is provided on the lower side of the membrane column 8, a concentrated water outlet 82 is provided on the upper side, and a produced water outlet 83 is provided on the top. The water inlet 81 is connected to the water inlet pipe 4 and the backwash discharge pipe 5 through the water inlet multi-way valve 84, the concentrated water outlet 82 is connected to the concentrated water discharge pipe 6 and the backwash discharge pipe 5 through the concentrated water multi-way valve 85, and the produced water outlet 83 is connected to the produced water pipe 7 through the produced water automatic valve 86; the control integrated box 1 and the extended membrane box 2, as well as multiple extended membrane boxes 2 are connected through the water inlet pipe 4, the backwash discharge pipe 5, the concentrated water discharge pipe 6 and the produced water pipe 7.

[0040] In specific embodiments, the water inlet pipe 4, the backwashing discharge pipe 5, the concentrated water discharge pipe 6 and the water production pipe 7 can be arranged inside or outside the control integrated box 1 and each extended membrane box 2. In this embodiment, the water inlet pipe 4, the backwashing discharge pipe 5, the concentrated water discharge pipe 6 and the water production pipe 7 are arranged inside the control integrated box 1 and each extended membrane box 2, and the positions of the water inlet pipe 4, the backwashing discharge pipe 5, the concentrated water discharge pipe 6 and the water production pipe 7 of the control integrated box 1 and the extended membrane box 2, and the adjacent two extended membrane boxes 2 correspond to each other, facilitating connection.

[0041] In specific embodiments, the two ends of the water inlet pipe 4, the concentrated water discharge pipe 6, the backwashing discharge pipe 5 and the water production pipe 7 are respectively provided with a female connector 9 and a male connector 10. The female connector 9 and the male connector 10 are respectively located on the two opposite sides of the control integrated box 1 and each extended membrane box 2. The male connector 10 matches the female connector 9, and the two are threadedly connected. The water inlet pipe 4, the concentrated water discharge pipe 6, the backwashing discharge pipe 5 and the water production pipe 7 of the control integrated box 1 and the plurality of extended membrane boxes 2 are respectively connected together through the female connector 9 and the male connector 10.

[0042] In specific embodiments, the female connector 9 includes a cylindrical female connector body 91, and the outer side of each end of the female connector body 91 is provided with a first external thread 92. The male connector 10 includes a male connector body 101, and the outer side of the middle part of the male connector body 101 is provided with a thread cover 102 matched with the first external thread 92. The outer side of one end of the male connector body 101 is provided with a second external thread 103, and the outer side of the other end is provided with an annular groove 104. The inner part of the annular groove 104 is provided with a sealing ring 105. The end of the male connector 10 close to the sealing ring 105 is embedded into one end of the female connector body 91, and the thread cover 102 is threadedly connected with the first external thread 93 of one end of the female connector body 91. The second external thread 103 of the male connector 10 and the first external thread 92 of one end of the female connector body 91 are threadedly connected with the water inlet pipe 4, the concentrated water discharge pipe 6, the backwashing discharge pipe 5 and the water production pipe 7 of the extended membrane box 2 or the control integrated box 1. When the female connector 9 and the male connector 10 are threadedly connected, the sealing ring 105 plays a role of increasing sealing and preventing water leakage.

[0043] In specific embodiments, the control integrated box 1 is internally provided with a controller 111, and externally provided with a display screen 112. The display screen 112 is connected with the controller 111 and controlled by the controller 111. The water inlet multi-way valve 44, the concentrated water multi-way valve 85 and the water production automatic valve 86 in the extended membrane box 2 are electrically connected with the controller 111 and controlled by the controller 111.

[0044] In the specific embodiment, each of the extended membrane boxes 2 is provided with a pressure stabilizer 21 and a second pressure sensor 22, the plurality of pressure stabilizers 21 are connected in parallel with the controller, the plurality of second pressure sensors 22 are connected in parallel with the pressure stabilizers 21, and the second pressure sensors 22 are arranged on the water inlet pipe 4, the concentrated water discharge pipe 6, the backwashing discharge pipe 5 and the water production pipe 7 in the extended membrane box 2.

[0045] In the specific embodiment, the control integrated box 1 is further provided with a filter 113, a frequency converter 114, a booster pump 115, a flow sensor 116, a concentrated water proportional valve 117, a water production proportional valve 118 and a first pressure sensor 119; wherein the frequency converter 114, the flow sensor 116, the concentrated water proportional valve 117, the water production proportional valve 118 and the first pressure sensor 119 are connected in parallel with the pressure stabilizer 21, and the booster pump 115 is connected in series with the frequency converter 114. The filter 113 and the booster pump 115 are arranged on the water inlet pipe 4 in the control integrated box 1, the flow sensor 116 and the concentrated water proportional valve 117 are arranged on the concentrated water discharge pipe 6 in the control integrated box 1, and the water production proportional valve 118 and the first pressure sensor 119 are arranged on the water production pipe 7 in the control integrated box 1.

[0046] In the specific embodiment, the filter 113 is a Y-shaped filter, which is used to intercept large particles in the water; the frequency converter 114 is used to control the frequency of the booster pump; the booster pump 115 is used to increase the pressure of the water; the flow sensor 116 is used to detect the flow discharge; the concentrated water proportional valve 117 is used to adjust the opening and closing degree of the concentrated water discharge, and the sensor is used to control the discharge; the water production proportional valve 118 is used to adjust the opening and closing degree of the water supply, and the sensor is used to control the water pressure during backwashing; and the first pressure sensor 119 is used to detect the pressure of the water production pipe.

[0047] In the specific embodiment, the control integrated box 1 is further provided with a low-pressure switch 120 and a high-pressure switch 121, both of which are connected in parallel with the pressure stabilizer 21. The low-pressure switch 120 is arranged on the water inlet pipe 4 in the control integrated box 1 and is close to the booster pump 115; and the high-pressure switch 121 is arranged on the water production pipe 7 in the control integrated box 1 and is close to the first pressure sensor 119. The low-pressure switch is used for water shortage protection and water stop; and the high-pressure switch is used for full water protection and full water shutdown.

[0048] By arranging the pressure stabilizer in each of the extended membrane boxes, the stability of the equipment operation is protected; by arranging the second pressure sensors on the water inlet pipe, the backwashing discharge pipe, the concentrated water discharge pipe and the water production pipe in each of the extended membrane boxes, when the pressure in the pipe exceeds the set value, it indicates that there is a problem with the operation of the extended membrane box, and the control device will close the water inlet multi-way valve, the concentrated water multi-way valve and the water production automatic valve of the extended membrane box, without affecting the operation of other extended membrane boxes.

[0049] In the specific embodiment, each of the extended membrane boxes 2 is provided with a plurality of membrane columns 8, and the plurality of membrane columns 8 are connected in parallel to increase the water treatment efficiency. The plurality of membrane columns 8 are independently arranged, and the water inlets 81 of the plurality of membrane columns 8 are communicated with the water inlet multi-way valve 84 through pipelines, the concentrated water outlets 82 are communicated with the concentrated water multi-way valve 85 through pipelines, and the product water outlets 83 are communicated with the product water automatic valve 86 through pipelines. The water inlet multi-way valve 84, the concentrated water multi-way valve 85 and the product water automatic valve 86 in each of the extended membrane boxes 2 are connected in parallel with the voltage stabilizer 21.

[0050] In the specific embodiment, the control integrated box 1 and the extended membrane box 2 are provided with the pipeline interface 11 and the line interface 12 on the opposite two outer sides, the pipeline interface 11 is the female connector 9 and the male connector 10, and the line interface 12 is a serial port. The two serial ports between the control integrated box 1 and the extended membrane box 2 and the adjacent two extended membrane boxes 2 are electrically connected through the 1 parallel port line 13. The controller 111 of the control integrated box 1 is electrically connected with the serial port of the control integrated box 1, and the two line interfaces 12 in the extended membrane box 2 are connected through lines; and the voltage stabilizer 21 is electrically connected with one of the line interfaces 12.

[0051] In the specific embodiment, the number of the extended membrane boxes 2 is increased according to the actual production, and when capacity expansion is needed, the rear cover 3 of the last extended membrane box 2 is removed, and the required extended membrane boxes 2 are connected in sequence through the pipeline interface 11 and the line interface 12.

[0052] The water treatment process of the above-mentioned extended ultrafiltration integrated equipment includes the following steps:

[0053] S11, during operation, the water is introduced from the water inlet interface of the control integrated box 1, enters the booster pump 115 for pressure boosting (when the 15-second low-pressure switch 120 cannot be reset, indicating that the water is cut off, and the equipment is stopped), and then is introduced into the membrane column 8 by the water inlet multi-way valve 44 of each of the extended membrane boxes 2 to start filtration;

[0054] S12, the concentrated liquid after filtration is guided to the concentrated water discharge pipe 6 by the concentrated water multi-way valve 85 of each of the extended membrane boxes 2, and the flow sensor 116 adjusts the opening degree of the concentrated water proportional valve 117 to control the discharge amount of the concentrated water to be appropriate;

[0055] S13, the product liquid during the filtration process is guided to the product water total by the product water automatic valve 86 of each of the extended membrane boxes 2, and is transported to the water use point through the external connection pipe; when the water use point is full or the water use is stopped, the pressure of the product water pipe 7 rises to the set value of the high-pressure switch 121, and the equipment is stopped; when the water use is restarted, the pressure is unloaded, and the equipment is restarted;

[0056] S14, when the membrane filaments of the membrane column 8 are blocked, the membrane filaments need to be positively or negatively washed.

[0057] The positive washing and negative washing method includes the following steps:

[0058] S21, positive flushing: the controller 111 increases the frequency of the booster pump 115 through the frequency converter 114 to increase the water supply, and the other extended membrane tanks 2 normally produce water, the water inlet multi-way valve 84 of the extended membrane tank 2 to be cleaned is turned on, the concentrated water multi-way valve 85 is turned on to the backwashing discharge pipe 5, and the raw water positive flushing assembly 40 seconds is used to complete the closing of the valve;

[0059] S22, backwashing up: the other extended membrane tanks 2 normally run, the water production automatic valve 86 of the extended membrane tank 2 to be cleaned is opened, the concentrated water multi-way valve 85 is turned on to the backwashing discharge pipe 5, and the first pressure sensor 119 and the water production proportional valve 118 control the water production pressure to be 1.0-1.2 bar, and the other extended membrane tanks 2 produce water to backwash the extended membrane tank 2 to be cleaned for 40-60 seconds, and then the valve is closed;

[0060] S23, backwashing down: the other extended membrane tanks 2 normally run, the water production automatic valve 86 of the extended membrane tank 2 to be cleaned is opened, the water inlet multi-way valve 84 is turned on to the backwashing discharge pipe 5, and the first pressure sensor 119 and the water production proportional valve 118 control the water production pressure to be 1.0-1.2 bar, and the other extended membrane tanks 2 produce water to backwash the extended membrane tank 2 to be cleaned for 40-60 seconds, and then the valve is closed.

[0061] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An extended ultrafiltration integrated equipment, comprising a control integrated box (1), an extended membrane box (2) and a rear cover (3); the control integrated box (1) is connected to the extended membrane box (2), and there are multiple extended membrane boxes (2), which are connected in sequence; the rear cover (3) is provided on the side of the extended membrane box (2) away from the control integrated box (1); and is characterized in that: It also includes a water inlet pipe (4), a backwash discharge pipe (5), a concentrated water discharge pipe (6) and a water production pipe (7). Both ends of the water inlet pipe (4), concentrated water discharge pipe (6), backwash discharge pipe (5) and produced water pipe (7) are respectively provided with a female connector (9) and a male connector (10), and the male connector (10) matches the female connector (9) and is threadedly connected; the control integrated box (1) and the plurality of the expanded membrane boxes (2) are sequentially connected through the female connector (9) and the male connector (10). Each of the expanded membrane boxes (2) is provided with a membrane column (8), and the membrane column (8) is provided with a water inlet (81), a concentrated water outlet (82) and a produced water outlet (83). The water inlet (81) is connected to the water inlet pipe (4) and the backwash discharge pipe (5) through a water inlet multi-way valve (84), the concentrated water outlet (82) is connected to the concentrated water discharge pipe (6) and the backwash discharge pipe (5) through a concentrated water multi-way valve (85), and the produced water outlet (83) is connected to the produced water pipe (7) through a produced water automatic valve (86); the control integrated box (1) and the expanded membrane box (2), as well as multiple expanded membrane boxes (2) are connected through the water inlet pipe (4), the backwash discharge pipe (5), the concentrated water discharge pipe (6) and the produced water pipe (7). Each of the expanded membrane boxes (2) is provided with a pressure stabilizer (21) and a second pressure sensor (22), a plurality of the pressure stabilizers (21) are connected in parallel with the controller, a plurality of the second pressure sensors (22) are connected in parallel with the pressure stabilizers (21), and a second pressure sensor (22) is provided on the water inlet pipe (4), the concentrated water discharge pipe (6), the backwash discharge pipe (5) and the produced water pipe (7) in the expanded membrane box (2). The control integrated box (1) is provided with a controller (111) and a display screen (112), the display screen (112) is electrically connected to the controller (111), and the water inlet multi-way valve (84), the concentrated water multi-way valve (85) and the water production automatic valve (86) in the plurality of the expanded membrane boxes (2) are all electrically connected to the controller (111); The control integrated box (1) and each of the extended membrane boxes (2) are provided with a water inlet pipe (4), a backwash discharge pipe (5), a concentrated water discharge pipe (6) and a water production pipe (7); the control integrated box (1) corresponds to the extended membrane box (2), and the water inlet pipe (4), backwash discharge pipe (5), concentrated water discharge pipe (6) and water production pipe (7) of two adjacent extended membrane boxes (2), and are connected.

2. The expandable ultrafiltration integrated equipment according to claim 1, characterized in that: The female connector (9) includes a female connector body (91), and the outer side surfaces of both ends of the female connector body (91) are provided with a first external thread (92). The male connector (10) includes a male connector body (101), and a threaded ring cover (102) matching the first external thread (92) is sleeved on the outer side of the middle part of the male connector body (101), and a second external thread (103) is provided on the outer side of one end, and a sealing ring (105) is sleeved on the outer side of the other end; one end of the male connector (10) abuts against the sealing ring (105) and is embedded in one end of the female connector body (91), and the threaded ring cover (102) is threadedly connected to the first external thread (92); the second external thread (103) and the first external thread (92) at one end of the female connector body (91) are threadedly connected to the water inlet pipe (4), the concentrated water discharge pipe (6), the backwash discharge pipe (5) and the water production pipe (7) of the expansion membrane box (2) or the control integrated box (1).

3. The expandable ultrafiltration integrated equipment according to claim 1, characterized in that: The control integrated box (1) is further provided with a filter (113), a frequency converter (114), a booster pump (115), a flow sensor (116), a concentrated water proportional valve (117), a produced water proportional valve (118), and a first pressure sensor (119); wherein the frequency converter (114), the flow sensor (116), the concentrated water proportional valve (117), the produced water proportional valve (118), and the first pressure sensor (119) are all connected in parallel with the controller (111); the filter (113) and the booster pump (115) are arranged on the water inlet pipe (4) inside the control integrated box (1); the flow sensor (116) and the concentrated water proportional valve (117) are arranged on the concentrated water discharge pipe (6) inside the control integrated box (1); and the produced water proportional valve (118) and the first pressure sensor (119) are arranged on the produced water pipe (7) inside the control integrated box (1).

4. The expandable ultrafiltration integrated equipment according to claim 3, characterized in that: A low-pressure switch (120) and a high-pressure switch (121) are further provided inside the control integrated box (1). Both the low-pressure switch (120) and the high-pressure switch (121) are electrically connected to the controller (111). The low-pressure switch (120) is provided on the water inlet pipe (4) inside the control integrated box (1) and is close to the booster pump (115); the high-pressure switch (121) is provided on the water production pipe (7) inside the control integrated box (1) and is close to the first pressure sensor (119).

5. The water treatment process of the expanded ultrafiltration integrated equipment according to claim 4, characterized in that: The steps include: S11, during operation, water is introduced from the water inlet interface of the control integrated box (1), enters the booster pump (115) through the filter (113) for pressurization, and then is introduced into the membrane column (8) through the water inlet multi-way valve (84) of each expansion membrane box (2) to start filtering; S12, the filtered concentrate is conducted by the concentrate multi-way valve (85) of each expansion membrane box (2) and collected in the concentrate discharge pipe (6), and the flow sensor (116) adjusts the opening and closing degree of the concentrate proportional valve (117) according to the parameters to control the concentrate discharge volume to be appropriate; S13, the output liquid in the filtration process is collected in the water production center under the guidance of the water production automatic valve (86) of each expansion membrane box (2), and is transported to the water point through the external connecting pipe; when the water point is full or the water supply is stopped, the pressure of the water production pipe (7) rises to the setting value of the high-pressure switch (121), and the equipment stops; when the water supply is used again, the pressure is unloaded and the equipment restarts; S14, when the membrane fibers of the membrane column (8) are clogged, it is necessary to backwash it.

6. The water treatment process of the expanded ultrafiltration integrated equipment according to claim 5, characterized in that: The backwashing in step S14 includes the following steps: S21, backwashing the upper row: the other extended membrane boxes (2) operate normally, the water production automatic valve (86) of the extended membrane box (2) to be cleaned is opened, the concentrated water multi-way valve (85) is connected to the backwash discharge pipe (5), and at the same time the first pressure sensor (119) and the water production proportional valve (118) control the water production pressure to be 1.0-1.2 bar, and the water produced by the other extended membrane boxes (2) is used to backwash the cleaned extended membrane box (2) for 40-60 seconds, and the valve is closed after completion; S22, backwashing and draining: the other extended membrane boxes (2) operate normally, the water production automatic valve (86) of the extended membrane box (2) to be cleaned is opened, the water inlet multi-way valve (84) is connected to the backwash discharge pipe (5), and at the same time the first pressure sensor (119) and the water production proportional valve (118) control the water production pressure to be 1.0-1.2 bar, and the water produced by the other extended membrane boxes (2) is used to backwash the extended membrane box (2) to be cleaned for 40-60 seconds, and the valve is closed after completion.

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