Movable hollow fiber reverse osmosis device

Abstract

The invention relates to the technical field of drinking water purification, and discloses a movable hollow fiber reverse osmosis device which comprises a hollow fiber reverse osmosis membrane which is hollow fiber membrane filaments and has the functions of gas washing shaking, backwashing and the like compared with a traditional spiral-wound membrane. One end of the reverse osmosis membrane is connected with a raw water pump, a laminated filter and a gas washing device, one side of the other end of the reverse osmosis membrane is connected with a raw water tank, and one side of the other end of the reverse osmosis membrane is connected with a backwashing dosing device and a water producing tank; an outlet of the gas washing device Roots blower is connected with an oil-water separator and an air filter; an outlet of the backwashing device is connected with a citric acid dosing device, a bactericide dosing device and an alkali dosing device; after being mixed by a pipeline mixer, the water enters a laminated filter to be filtered and enters a water producing end of a membrane component; and the water transfer pump supplies water to a water using point through a water supply pump. The connecting pipe enables the pipelines of the whole reverse osmosis filtering mechanism to form a parallel-connection path through the control of a valve (electric or manual), the contrast experiment of different models of membranes is fully performed, the separation degree of concentrated water and fresh water is high, the pilot plant is designed to be integrated in a small container, the pilot plant has the advantage of being convenient to move, and the pilot plant is suitable for large-scale popularization and application. Depending on the on-line monitoring of various instruments, through the control of an automatic control system, the number of residual ions (TDS) in the output of the corresponding fresh water is reduced, and the purity is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of drinking water purification, in particular to a mobile hollow fiber reverse osmosis device. Background Art

[0002] Reverse osmosis, also known as reverse osmosis, is a membrane separation technology that uses pressure difference as a driving force to separate solvents from solutions. When pressure is applied to the original solution on one side of the membrane, when the pressure exceeds its osmotic pressure, the solvent will reversely penetrate in the direction of natural penetration. As a result, the permeated solvent, i.e., the permeate, is obtained on the low-pressure side of the membrane; the concentrated solution, i.e., the concentrate, is obtained on the high-pressure side.

[0003] In the existing reverse osmosis purification structure for drinking water, there are certain deficiencies in the diversion structure for concentrated water and fresh water. There is no air washing and backwashing process, which leads to membrane clogging. Although chemical cleaning (forward washing) can alleviate the problem, the desalination rate of the membrane gradually decreases after cleaning, resulting in poor treatment effect. Therefore, corresponding improvements need to be made to the membrane structure and treatment process. Summary of the invention

[0004] The object of the present invention is to provide a mobile hollow fiber reverse osmosis device to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a mobile hollow fiber reverse osmosis device, comprising a reverse osmosis membrane element;

[0006] One end of the reverse osmosis membrane element is connected to a laminated filter, the inlet of the laminated filter is connected to a raw water pump, the inlet of the raw water pump is connected to a water source, and an air washing device is installed at the inlet to realize an air washing function;

[0007] One side of the reverse osmosis membrane element is connected to a water production pipe, the water production pipe is connected to a water production tank, the water production pipe interface is connected to a backwash water inlet pipe, and the water enters the water production pipe after adding drugs and filtering;

[0008] One side of the reverse osmosis membrane element is connected to a concentrated water pipe, and the concentrated water pipe is connected to a drain pipe;

[0009] The unique backwash process developed for the reverse osmosis membrane element will not degrade the recovery rate of the membrane;

[0010] The mobile hollow fiber reverse osmosis device comprises a reverse osmosis membrane element, which is equidistantly arranged on one side of a frame. Joints are symmetrically installed at the four ends of the reverse osmosis membrane element. During operation, three ends are connected to pipelines, air washing enters from the water inlet, one side of the concentrated water joints on both sides is connected to the concentrated water pipe, and the other side of the joints is blocked, the water outlet is connected to the water outlet, and the backwash enters from the water outlet. The effect of backwashing is better after adding medicine. A dosing device is provided, and the drainage is collected and uniformly discharged outside the pilot device.

[0011] Preferably, the reverse osmosis assembly comprises a membrane shell in which reverse osmosis membrane filaments are loaded, and a membrane element is obtained after packaging.

[0012] Preferably, the unique backwashing process of the reverse osmosis guarantees the desalination rate and recovery rate of the membrane to a certain extent.

[0013] Preferably, the reverse osmosis membrane fibers are evenly distributed in the membrane shell, and a circular tube is connected at the center, and the circular tube is connected to one side of the water production pipe.

[0014] Preferably, the water inlet of the membrane element is provided with an air washing process, which effectively removes pollutants and scaling on the membrane surface by shaking the membrane filaments.

[0015] Preferably, the unique design concept and integration process are convenient for transportation, beautiful and elegant, and also interchangeable.

[0016] Preferably, the automatic control system is unattended, and the test results and phenomena are recorded accurately without errors.

[0017] Preferably, the membrane inlet and outlet pipelines of the device form parallel passages, and the raw water is evenly distributed through the inlet water after being diverted.

[0018] The setting of the pilot plant in the present invention enables the pipelines of the entire reverse osmosis pilot plant to form parallel passages. The raw water will be evenly distributed through the inlet water after being diverted, so that the filtering capacity of the reverse osmosis membrane element can be fully exerted, and the separation degree of concentrated water and fresh water is high. The design of the backwash system and the air washing system effectively solves the pollution and scaling of the membrane and successfully extends the service life of the membrane. The hollow fiber reverse osmosis membrane adapts to the characteristics of fast fresh water flow rate, and the concentrated water is discharged through the high concentrated water outlet, which further improves the aggregation degree of ions in the concentrated water. As the aggregation degree of concentrated water increases, the corresponding residual ions in the output of fresh water are also less, and the purity is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structural system of the present invention;

[0020] Figure 2 This is a process flow chart of the reverse osmosis pilot plant of the present invention;

[0021] Figure 3 It is a three-view diagram of the reverse osmosis pilot plant of the present invention;

[0022] Figure 4 It is a schematic diagram of the overall layout of the reverse osmosis pilot plant of the present invention;

[0023] Figure 5 This is the overall appearance diagram of the reverse osmosis pilot plant of the present invention;

[0024] Figure 6It is a schematic diagram of the structure of the automatic control cabinet of the reverse osmosis pilot plant of the present invention.

[0025] Figure 7 It is a schematic diagram of the structure of the membrane element of the reverse osmosis pilot plant of the present invention.

[0026] In the figure: 1, automatic control cabinet; 2, raw water tank; 3, raw water pump; 4, laminated filter; 5 reverse osmosis membrane element; 6, pressure instrument; 7, control valve; 8, flow meter; 9, water supply pump; 10, backwash pump; 11, water production tank; 12, citric acid dosing device; 13, fungicide dosing device; 14, alkali dosing device; 201, raw water inlet pipeline; 202, liquid level meter; 203, downpipe; 204, return pipe; 205, pump port pressure instrument; 206, membrane inlet Instrument; 207, laminated filter drain; 208, backwash water inlet; 209, Roots blower; 210, oil-water separator; 211, air filter; 212, air intake pressure instrument; 213, drain pipe; 214, lower drain pipe; 215, concentrated water pressure flow meter; 216, concentrated water mother pipe exhaust valve; 217, water production wood pipe exhaust valve; 218, backwash control instrument; 219, backwash exhaust valve; 220, backwash laminated filter; 221, backwash laminated filter drain 222, pipeline mixer; 223, concentrated water meter; 224, water production pipe; 225, water production level meter; 226, backwash return pipe; 227, water production tank drain valve; 228, water point; 301, system host main view; 302, system host top view; 303, system host left view; 401, system whole machine layout side door; 402, system whole machine layout floor drain pipe; 403, system whole machine layout water supply pipe; 404, system whole machine layout water inlet Pipe; 405, system layout diagram drainage pipe; 501, whole machine floor fixings; 502, container; 503, lifting lug; 605, PLC; 611, circuit breaker; 608, contactor; 609, thermal relay; 603, terminal block; 604, switch; 601, button; 607, inverter; 610, coil; 602, fixings; 606, lifting lug; 701, water inlet; 702, concentrate outlet 1; 703, concentrate outlet 2; 704, water outlet. DETAILED DESCRIPTION

[0027] The following will be combined with the accompanying drawings in the implementation of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments 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 work are within the scope of protection of the present invention.

[0028] See also Figure 1-7In the figure, a mobile hollow fiber reverse osmosis device includes a raw water tank 2, the water inlet of the raw water tank 2 is connected to the external water source 201, the upper part is equipped with a liquid level meter 202 for control, the outlet is connected to the raw water pump 3, the outlet of the raw water pump 3 is provided with a return pipe 204 and a pressure meter 205, the inlet and outlet of the raw water pump 3 are equipped with high and low pressure protection devices to protect and stop the pump under high pressure or water shortage and low pressure conditions, the outlet of the raw water pump 3 is connected to the laminated filter 4, the filter is equipped with a drain port 207 to realize the sewage discharge and cleaning function of the laminated filter, and the outlet of the laminated filter 4 is connected to the reverse osmosis membrane element 5.

[0029] The inlet of the reverse osmosis membrane element 5 is installed with a pressure meter, a flow meter, a COD meter, etc. 206. At the same time, the membrane inlet is connected to an air washing function. The air source is provided by a Roots blower 209, and is filtered step by step through an oil-water separator 210 and an air filter 211. The pressure meter 212 detects whether the pressure level meets the needs, the start and stop of the Roots blower, etc. An exhaust valve 216 is installed on the concentrated water mother pipe to prevent the formation of air binding and air blocking. The concentrated water flow meter measures the concentrated water flow, and the pressure meter measures the concentrated water operating pressure. An exhaust valve 219 is installed on the water production pipe to prevent the formation of air binding and air blocking, and a water production flow pressure meter 218 is installed. In order to realize the backwashing function, the water production pipe is provided with a water washing inlet 208 and an upper discharge 214 and a lower discharge 203 system.

[0030] A liquid level meter 225 and a water inlet pipe 224 are installed at the upper end of the water production tank 11. The outlet of the water production tank 11 is connected to the backwash pump 10 and the water supply pump 9. The outlet of the water supply pump is connected to the user 228. A return pipe 226 is installed at the outlet of the backwash pump for adjusting the backwash flow rate. A pipeline mixer 222 is installed on the backwash pipe. The pipeline mixer 222 is connected to a citric acid dosing device 12, a bactericide dosing device 13, and an alkali dosing device 14. The outlet of the pipeline mixer 222 is connected to a laminated filter 220 to prevent drug particles, large molecules, etc. from entering the membrane pores. The laminated filter 220 is provided with a lower drain 221, which realizes the cleaning and sewage discharge functions of the laminated filter. An emptying pipe 227 is provided at the bottom of the water production tank 11, and is connected to the drain outlet 223 together with all drainage pipes.

[0031] The main view 301, top view 302 and left view 303 of the pilot plant system diagram fully reflect the structure of the pilot plant, the spatial layout, and provide assembly guidance. The design is compact and reasonable. In order to achieve mobility, the container 502 is designed. The container 502 is provided with a lifting lug 503, a fixed interface 501, and a side door 401. The rear end is provided with a quick-install water supply connector 403, a ground drainage interface 402, a water inlet interface 404, and a drainage interface 405 to facilitate the equipment connection process during movement.

[0032] The reverse osmosis membrane element is mainly formed by encapsulating hollow fiber membrane filaments and PVDF membrane shells. The membrane element is provided with a water inlet 701, a concentrate inlet 702, a concentrate inlet 703, and a water production inlet 704. The air wash air inlet enters from the water inlet 701. The two concentrate inlets have the same function and can be selected according to actual conditions for easy installation.

[0033] The incoming line of PLC cabinet 1 is connected to a 380V power supply, and the outgoing line is connected to the power points and control points of the pilot plant. Through program control, unattended operation and a high degree of automation are achieved, and the operation status and test data are recorded in real time through automated access.

[0034] Working principle: Raw water is pressurized by the raw water pump 3 and sent into the raw water pipe. After being diverted by the raw water pipe, it is introduced into the reverse osmosis membrane element 5 from the water inlet 701. After being filtered by the reverse osmosis membrane element 5, pure fresh water penetrates through the membrane fibers to the fresh water end. The fresh water flows into the fresh water pipeline through the fresh water port 704 and flows to the water production tank 11. The concentrated water flows into the concentrated water pipe through the concentrated water port 702 or 703 and is connected to the main drainage pipe. After the air source is filtered step by step during the air washing process, it enters the shaking membrane fibers from the membrane water inlet 701. After the backwash process is filtered by adding chemicals, it enters the backwash through the fresh water port 704.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device containing a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mobile hollow fiber reverse osmosis device, characterized in that: The PLC cabinet (1) has an inlet connected to a 380V power supply, and an outlet connected to each power point and control point of the pilot plant. The PLC cabinet (1) contains a PLC (605), a circuit breaker (611), a contactor (608), a thermal relay (609), a wiring terminal (603), a switch (604), a button (601), a frequency converter (607), a coil (610), a fixing part (602), a lifting lug (606), etc. The water inlet of the raw water tank (2) is connected to an external water source (201), a liquid level meter (202) is provided on the upper part for control, and the outlet is connected to a raw water pump (3), a return pipe (204) and a pressure meter (205) are provided at the outlet of the raw water pump (3), the outlet of the raw water pump (3) is connected to a laminated filter (4), the filter is provided with a drain outlet (207), and the outlet of the laminated filter (4) is connected to a reverse osmosis membrane element (5); The reverse osmosis membrane element (5) is provided with a pressure flow COD meter (206) at the inlet, and is also provided with an air washing function, which is mainly achieved through a Roots blower (209), an oil-water separator (210), an air filter (211), and a pressure meter (212). The concentrated water pipe is provided with an exhaust valve (216) and a concentrated water flow pressure meter (215), and the produced water pipe is provided with an exhaust valve (219) and a produced water flow pressure meter (218). In order to achieve the backwashing function, the produced water pipe is provided with a water washing inlet (208) and an upper discharge (214) and lower discharge (203) system; The upper end of the water production tank (11) is provided with a liquid level meter (225) connected to a water inlet pipe (224), the outlet is connected to a backwash pump (10) and a water supply pump (9), the outlet of the water supply pump is connected to a user (228), the outlet of the backwash pump is provided with a return pipe (226), the backwash pipe is provided with a pipeline mixer (222), the pipeline mixer (222) is connected to a citric acid dosing device (12), a bactericide dosing device (13), and an alkali dosing device (14), the outlet of the pipeline mixer (222) is connected to a laminated filter (220), the laminated filter (220) is provided with a lower drain (221), and the bottom of the water production tank (11) is provided with an emptying pipe (227), which is connected to a drain outlet (223) together with all drain pipes; The pilot plant system diagram front view (301), top view (302), and left view (303) are compactly designed and reasonably structured; in order to achieve mobility, the pilot plant is designed in a container (502), and the container (502) is provided with a lifting lug (503), a fixing interface (501), and a side door (401); the rear end is provided with a quick-install water supply connector (403), a ground drainage interface (402), a water inlet interface (404), and a drainage interface (405); The reverse osmosis membrane element is provided with a water inlet (701), a concentrate inlet 1 (702), a concentrate inlet 2 (703), and a water production inlet (704), wherein the air wash air inlet enters from the water inlet (701).

2. A mobile hollow fiber reverse osmosis device according to claim 1, characterized in that: The related functions and programming of various components in the PLC cabinet (1) fully realize the automatic operation of the pilot plant without the need for manual supervision, and record the test operation status and data online.

3. A mobile hollow fiber reverse osmosis device according to claim 2, characterized in that: The raw water tank (2) has an intermediate transition function to prevent the raw water pump (3) from being emptied. The liquid level meter (202) controls the on-off action of the water inlet valve. The return pipe adjusts the required flow rate. The laminated filter (4) prevents large particles such as colloidal organic suspended matter from entering the membrane, thereby achieving a body interception effect.

4. According to the mobile hollow fiber reverse osmosis device of claim 3, the reverse osmosis membrane element (5) realizes the automatic control process through instrumentation, and the flow meter detects the flow rate and calculates whether the recovery rate meets the design requirements.

5. According to the mobile hollow fiber reverse osmosis device described in claim 3, in the reverse osmosis membrane element (5) air washing process, the air pressure is increased by a Roots blower (209), and after being processed by a simple oil-water separator (210) and an air filter (211), the air enters the membrane, shakes the membrane filaments, and realizes the process of shedding the membrane filament attachments.

6. According to the mobile hollow fiber reverse osmosis device described in claim 4, the membrane water outlet (704) is provided with a backwash function. After adding medicine for backwashing, the membrane pollution and scaling are effectively removed, and the problem of membrane fouling and clogging is successfully solved. At the same time, the desalination rate of the membrane will not be reduced. In order to prevent granular drugs or large particles of harmful substances from entering the membrane pores, a laminated filter (220) is provided in front of the water inlet for interception.

7. According to the mobile hollow fiber reverse osmosis device described in claim 5, the system is compactly designed into a container (502), which is convenient for transportation, beautiful and elegant, and at the same time meets the requirements of interchangeability, various models of membrane elements, various types of membrane elements, and has the relevant functions of testing ultrafiltration, nanofiltration, and MBR.

8. According to the mobile hollow fiber reverse osmosis device described in claim 6, the hollow fiber reverse osmosis membrane element (5) has the performance of both reverse osmosis and ultrafiltration, has the high desalination rate and high recovery rate of the reverse osmosis membrane, and has the operating performance of ultrafiltration; a unique reverse osmosis backwashing, air washing, forward washing, and combined washing process has been developed for the hollow fiber reverse osmosis membrane.

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