Test platform for reverse osmosis membrane element of portable seawater desalination device

Abstract

The utility model relates to the technical field of reverse osmosis membrane element testing, and discloses a testing platform for a reverse osmosis membrane element of a portable seawater desalination device, which comprises a water tank, a water inlet pump, a UF (ultra-filtration), a high-pressure pump, constant-temperature equipment, a precision filter, a circulating water pump, a reverse osmosis membrane testing membrane shell, a pipeline, an instrument and the like, according to the utility model, the performance test of the reverse osmosis membrane element at one to five stations can be realized according to the adjustment of the valves, different parameter conditions are set by simulating the pressure supply characteristic of manual driving, and the performance of the reverse osmosis membrane element can be accurately tested. And the performance of the reverse osmosis membrane element of the portable seawater desalination device can be effectively evaluated.

Description

Technical Field

[0001] The utility model relates to the technical field of reverse osmosis membrane element testing, in particular to a reverse osmosis membrane element testing platform and related testing units. Background Art

[0002] Reverse osmosis is one of the most advanced and effective membrane separation technologies today, and is the mainstream technology for seawater desalination. Special research and development is carried out to meet the application needs of specific scenarios, such as maritime emergency rescue, field exploration, and scientific investigations, to turn seawater into drinkable fresh water in a short time. Under the premise of ensuring product flux and desalination rate, personnel should be provided with better human-driven portable seawater desalination devices that are more suitable for special working conditions. Chinese patent CN201220240657.1 discloses a human-driven seawater desalination device with energy recovery function, which provides a human-powered portable seawater desalination device solution for emergency rescue and other fields. Chinese patent CN112985860B discloses a test platform and test method for a handheld seawater desalination machine, which provides a performance test method for the development of portable seawater desalination devices.

[0003] The energy drive system of the human-driven portable seawater desalination device has the characteristic of pulsed pressure supply due to its special structure. However, the current performance tests of reverse osmosis membrane elements are all carried out under constant pressure conditions. Therefore, developing a reverse osmosis membrane element testing platform with pulsed pressure supply can more accurately evaluate the performance indicators of the human-driven portable seawater desalination device.

[0004] The test platform proposed by the utility model can effectively evaluate the performance of the reverse osmosis membrane element of the portable seawater desalination device by simulating the pressure supply characteristics of human drive and setting different parameter conditions. Utility Model Content

[0005] According to the operation characteristics and test principles of a human-driven portable seawater desalination device, a test platform for reverse osmosis membrane elements of a portable seawater desalination device is provided.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A test platform for reverse osmosis membrane elements of a portable seawater desalination device, including a water tank, a water inlet pump, UF ultrafiltration, a high-pressure pump, a constant temperature device, a precision filter, a circulating water pump, a reverse osmosis membrane test membrane shell, pipelines, instruments, etc.

[0008] The water pipe under the water tank is connected to the water inlet of the water inlet pump. The water in the water tank flows out through the water outlet of the water inlet pump and is divided into two paths. One path flows through the UF ultrafiltration and then enters the water tank, and the other path flows through the pipeline flow meter and precision filter and then flows into the high-pressure pump. The test water is pressed into six branches through the pressure pipe through the water outlet of the high-pressure pump, and one is connected to the total pressure gauge; the other five branches pass through the ball valve, the water inlet pressure gauge, and the membrane element in turn. The concentrated water of the test water flowing through the membrane element flows back to the water tank through the concentrated water pressure gauge, the regulating valve, and the concentrated water flowmeter. The produced water of the test water flowing through the membrane element is connected by a transparent hose, collected through the return water tank, and flows back to the water tank through the return water pipe.

[0009] The water tank drain port is connected to the UF ultrafiltration drain port and piped, and each is equipped with a drain ball valve;

[0010] The instruments include: flow meter, ball valve, pressure gauge, regulating valve;

[0011] The ball valve includes: a water tank drain valve, a UF ultrafiltration water inlet valve, a precision filter water inlet valve, and five reverse osmosis membrane element water inlet control valves;

[0012] The regulating valves are five single-position regulating valves and one total flow regulating valve;

[0013] The number of pressure gauges is 10;

[0014] Preferably, the high pressure pump is a plunger type high pressure pump;

[0015] Constant temperature equipment and circulating water pump are used to maintain a constant temperature of the test water in the water tank;

[0016] According to the valve adjustment, the performance test of reverse osmosis membrane elements can be realized at one to five stations.

[0017] The characteristics and beneficial effects of the utility model are:

[0018] This test platform uses a pulsed plunger high-pressure pump as the pressure supply unit to provide actual operating pressure conditions for the reverse osmosis membrane elements of the portable desalination device, which can better evaluate the performance of the reverse osmosis membrane elements in the portable desalination device. The testable performance parameters include the water production rate, desalination rate, water production during the entire life cycle, pressure resistance, acid and alkali resistance, high and low temperature resistance, pollution resistance, and cleaning recovery rate after pollution of the reverse osmosis membrane elements. It greatly simulates the characteristics of human drive and enhances the accuracy of the test results. Specifically, it has the following functions:

[0019] (1) The pressure supply unit of the diaphragm test bench adopts a plunger-type high-pressure pump with a pulse effect, which can provide fluctuating pressure supply for the reverse osmosis membrane element, better simulate the pressure supply conditions under human drive, and more accurately evaluate the performance of the reverse osmosis membrane element.

[0020] (2) A double reflux system is designed for membrane elements with different water fluxes. The opening of the reflux valve can control the flow rate entering the high-pressure pump and the membrane element test bench to meet the flow rate requirements of the membrane element to be tested and ensure the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a structural schematic diagram of the test platform provided by the utility model.

[0023] Figure 2 This is a schematic diagram of the bottom structure of the test platform provided by the utility model.

[0024] The above drawings include the following reference numerals:

[0025] 1- constant temperature equipment, 2- circulating water pump, 3- water tank, 4- UF ultrafiltration, 5- water inlet pump, 6- precision filter, 7- high pressure pump, 8- pressure gauge, 9- reverse osmosis membrane element, 10- pipeline flow meter;

[0026] Water tank drain valve A-1, UF ultrafiltration water inlet valve A-2, precision filter water inlet valve A-3, reverse osmosis membrane element water inlet control valve A-4, reverse osmosis membrane element water inlet control valve A-5, reverse osmosis membrane element water inlet control valve A-6, reverse osmosis membrane element water inlet control valve A-7, reverse osmosis membrane element water inlet control valve A-8;

[0027] Control valve B-1, control valve B-2, control valve B-3, control valve B-4, control valve B-5, total flow control valve B-6;

[0028] Pressure gauge 8-1, pressure gauge 8-2, pressure gauge 8-3, pressure gauge 8-4, pressure gauge 8-5, pressure gauge 8-6, pressure gauge 8-7, pressure gauge 8-8, pressure gauge 8-9, pressure gauge 8-10;

[0029] Reverse osmosis membrane element 9-1, reverse osmosis membrane element 9-2, reverse osmosis membrane element 9-3, reverse osmosis membrane element 9-3, reverse osmosis membrane element 9-5; DETAILED DESCRIPTION

[0030] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively below, and preferred embodiments of the present invention are given. However, it should be understood that these embodiments are only used for more detailed description, and should not be understood as limiting the present invention in any form, that is, they are not intended to limit the protection scope of the present invention; relational terms such as "first" and "second" are only used to distinguish one component from another with the same name, and do not necessarily require or imply any such actual relationship or order between these components.

[0031] like Figure 1 and Figure 2 As shown, a test platform for reverse osmosis membrane elements of a portable seawater desalination device includes a water tank 3, a water inlet pump 5, a UF ultrafiltration 4, a high-pressure pump 7, a constant temperature device 1, a precision filter 6, a circulating water pump 2, a reverse osmosis membrane test membrane shell 9, pipelines, instruments, etc.

[0032] The water pipe below the water tank 3 is connected to the water inlet of the water inlet pump 5. The water in the water tank 3 flows out through the water outlet of the water inlet pump 5 and is divided into two paths. One path flows through the UF ultrafiltration 4 and then enters the water tank 3. The other path flows through the pipeline flow meter and the precision filter 6 and then flows into the high-pressure pump 7. The test water is pressed into six branches through the pressure pipe through the outlet of the high-pressure pump 7, and one is connected to the total pressure gauge; the other five branches pass through the ball valve, the water inlet pressure gauge, and the membrane element in sequence. The concentrated water of the test water flowing through the membrane element flows back to the water tank through the concentrated water pressure gauge, the regulating valve, and the concentrated water flowmeter. The produced water of the test water flowing through the membrane element is connected by a transparent hose, collected through the return water tank, and flows back to the water tank 3 through the return water pipe.

[0033] The drain outlet of water tank 3 is connected with the drain outlet of UF ultrafiltration 4 and is piped, and each is equipped with a drain ball valve;

[0034] Instruments include: flow meter, ball valve, pressure gauge, regulating valve;

[0035] The ball valves include: water tank drain valve A-1, UF ultrafiltration water inlet valve A-2, precision filter water inlet valve A-3, reverse osmosis membrane element water inlet control valve A-4, reverse osmosis membrane element water inlet control valve A-5, reverse osmosis membrane element water inlet control valve A-6, reverse osmosis membrane element water inlet control valve A-7, reverse osmosis membrane element water inlet control valve A-8;

[0036] The regulating valve is a single-position regulating valve and a total flow regulating valve B-6, and the single-position regulating valve includes: regulating valve B-1, regulating valve B-2, regulating valve B-3, regulating valve B-4, regulating valve B-5;

[0037] The pressure gauges include: pressure gauge 8-1, pressure gauge 8-2, pressure gauge 8-3, pressure gauge 8-4, pressure gauge 8-5, pressure gauge 8-6, pressure gauge 8-7, pressure gauge 8-8, pressure gauge 8-9, pressure gauge 8-10;

[0038] The high pressure pump 7 uses a plunger type high pressure pump;

[0039] The constant temperature device 1 and the circulating water pump 2 are used to maintain the temperature of the test water in the water tank 3 constant;

[0040] According to the valve adjustment, the performance test of reverse osmosis membrane elements can be realized at one to five stations.

[0041] A test method using a test platform for a portable seawater desalination device reverse osmosis membrane element comprises the following steps:

[0042] Step 1. During the test, open the regulating valves B-1 to B-5 to the maximum, and close the total flow valve B-6 completely. It is normally open;

[0043] Step 2. Slowly rotate the regulating valves B-1 to B-5, and observe the pressure gauges 8-6 to 8-10 while rotating to ensure that the pressure slowly rises to the specified value;

[0044] Step 3. Slowly open the total flow control valve B-6 and slowly reduce the pressure index of the pressure gauges 8-6 to 8-10 to the specified value;

[0045] Repeat the above steps until the pressure indexes of the five groups of pressure gauges: pressure gauge 8-1 and pressure gauge 8-6, pressure gauge 8-2 and pressure gauge 8-7, pressure gauge 8-3 and pressure gauge 8-8, pressure gauge 8-4 and pressure gauge 8-9, pressure gauge 8-5 and pressure gauge 8-10 are consistent. At this point, the reverse osmosis membrane element test platform is started.

[0046] After the test is started, after a certain period of operation, the five reverse osmosis membrane element test units, namely reverse osmosis membrane element 9-1, reverse osmosis membrane element 9-2, reverse osmosis membrane element 9-3, reverse osmosis membrane element 9-3 and reverse osmosis membrane element 9-5, can be connected to the external hose to collect the produced water for detecting the reverse osmosis membrane element parameter indicators.

[0047] This embodiment also provides a method for performance testing under different requirements:

[0048] The operation process of testing the filtering performance and service life of the reverse osmosis membrane at different temperatures is as follows: adjust the set temperature value of the thermostatic device 1, and make the temperature in the water tank 3 constant and the set value through the circulating water pump 2; open the reverse osmosis membrane element water inlet control valve A-2 and the reverse osmosis membrane element water inlet control valve A-3, and pressurize the high-pressure pump 7 to press the test solution into the reverse osmosis membrane elements 9-1 to 9-5; before the test, open the regulating valves B-1 to B-5 to the maximum, close the regulating valve B-6 completely, and adjust the regulating valves B-1 to B-5. Rotate slowly, and observe the pressure gauges 8-6 to 8-10 while rotating to ensure that the pressure slowly rises to the specified value. Slowly open the regulating valve B-6, and adjust the pressure index of the pressure gauges 8-6 to 8-10 to slowly decrease to the specified value. Repeat the above operation until the pressure indexes of the pressure gauges 8-1 and 8-6, pressure gauges 8-2 and 8-7, pressure gauges 8-3 and 8-8, pressure gauges 8-4 and 8-9, and pressure gauges 8-5 and 8-10 are consistent; run the system for the time required for the experiment, and perform data reading and testing.

[0049] The operation process of detecting the filtration performance and service life of the reverse osmosis membrane element under different pressures is as follows: open the control valve A-2 and the control valve A-3, increase the pressure by the high-pressure pump 7, and pressurize the solution to be tested into the reverse osmosis membrane element 9-1 to the reverse osmosis membrane element 9-5; before the test, open the regulating valves B-1 to B-5 to the maximum, close the regulating valve B-6 completely, rotate the regulating valves B-1 to B-5 slowly, observe the pressure gauges 8-6 to 8-10 while rotating, and ensure that the pressure slowly rises to the specified value, slowly open the valve B-6, and adjust the pressure index of the pressure gauges 8-6 to 8-10 to slowly decrease to the specified value, repeat the above operation until the pressure indexes of the pressure gauges 8-1 and 8-6, pressure gauges 8-2 and 8-7, pressure gauges 8-3 and 8-8, pressure gauges 8-4 and 8-9, and pressure gauges 8-5 and 8-10 are consistent; the test pressure can be changed by slowly rotating the valve B-6, and the system is operated for the required time of the experiment to read and test the data.

[0050] The operation process of testing the filtering performance and service life of the reverse osmosis membrane element for different test solutions is as follows: open the ball valve A-1 to drain the solution in the water tank 3, and clean the water tank 3 with pure water; after replacing the test solution into the water tank 3, close the ball valve A-1, open the ball valves A-2 and A-3, and pressurize the high-pressure pump 7 to press the test solution into the reverse osmosis membrane elements 9-1 to 9-5; before the test, open the regulating valves B-1 to B-5 to the maximum, close the regulating valve B-6 completely, and open the regulating valves B-1 to B-7. -5 slowly rotate, observe the pressure gauges 8-6 to 8-10 while rotating, ensure that the pressure slowly rises to the specified value, slowly open the regulating valve B-6, adjust the pressure index of the pressure gauges 8-6 to 8-10 to slowly decrease to the specified value, repeat the above operation until the pressure indexes of the pressure gauges 8-1 and 8-6, pressure gauges 8-2 and 8-7, pressure gauges 8-3 and 8-8, pressure gauges 8-4 and 8-9, and pressure gauges 8-5 and 8-10 are consistent, run the system for the time required for the experiment, and perform data reading and testing.

[0051] It should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A test platform for reverse osmosis membrane elements of a portable seawater desalination device, characterized in that: It includes a water tank (3), a water inlet pump (5), a UF ultrafiltration (4), a high-pressure pump (7), a constant temperature device (1), a precision filter (6), a circulating water pump (2), a reverse osmosis membrane test membrane shell (9), pipelines, and instruments; The high-pressure pump (7) is a plunger-type high-pressure pump; The instruments include: flow meter, ball valve, pressure gauge, regulating valve; The ball valve includes: a water tank drain valve, a UF ultrafiltration water inlet valve, a precision filter water inlet valve, and a reverse osmosis membrane element water inlet control valve. The number of the reverse osmosis membrane element water inlet control valves is 5; The regulating valve includes a single-position regulating valve and a total flow regulating valve, and the number of the single-position regulating valves is 5; The number of pressure gauges is 10; The water pipe below the water tank (3) is connected to the water inlet of the water inlet pump (5). The water in the water tank (3) flows out through the water outlet of the water inlet pump (5) and is divided into two paths. One path flows through the UF ultrafiltration (4) and then enters the water tank (3). The other path flows through the pipeline flow meter and the precision filter (6) and then flows into the high-pressure pump (7). The test water is pressed into six branch lines through the pressure pipe through the water outlet of the high-pressure pump (7), and one branch line is connected to the total pressure gauge; the other five branches pass through the ball valve, the water inlet pressure gauge, and the membrane element in sequence. The concentrated water of the test water flowing through the membrane element flows back to the water tank through the concentrated water pressure gauge, the regulating valve, and the concentrated water flow meter. The produced water of the test water flowing through the membrane element is connected by a transparent hose, collected by the return water tank, and flows back to the water tank (3) through the return water pipe; The water tank (3) drainage outlet is connected to the UF ultrafiltration (4) drainage outlet and is connected by pipes, and is respectively equipped with a drainage ball valve.

2. The test platform for the reverse osmosis membrane element of a portable seawater desalination device according to claim 1, characterized in that: The constant temperature device (1) and the circulating water pump (2) are used to maintain a constant temperature of the test water in the water tank (3).

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