Container type seawater desalination reverse osmosis membrane testing device

Abstract

The utility model belongs to the technical field of seawater desalination, and discloses a container type seawater desalination reverse osmosis membrane testing device which comprises a security filter, a high-pressure pump, a booster pump, a reverse osmosis membrane assembly, an energy recovery device, a flushing water tank, a flushing water pump, a chemical cleaning water tank and a chemical cleaning water pump. The experimental device provided by the utility model solves the technical problems that the seawater desalination reverse osmosis membranes cannot be subjected to comparison test at the same time, the same water quality of each reverse osmosis membrane assembly cannot be ensured, and each reverse osmosis membrane assembly cannot be chemically cleaned independently. The experimental device provided by the utility model can simultaneously test a plurality of reverse osmosis membrane assemblies connected in parallel, can adjust the water production proportion of the front ends and the rear ends of the reverse osmosis membrane assemblies, and can independently perform chemical cleaning on each reverse osmosis membrane assembly. By comparing the water production conductivity of each reverse osmosis membrane assembly, the chemical cleaning period and the change conditions of the desalination rate and the pressure difference before and after chemical cleaning, the reverse osmosis membrane assembly meeting the use requirement can be preferably selected.

Description

TECHNICAL FIELD

[0001] The application relates to a container type seawater desalination reverse osmosis membrane testing device and belongs to the technical field of seawater desalination. BACKGROUND

[0002] The principle of seawater desalination reverse osmosis is to obtain fresh water on the low-pressure side of a membrane and obtain concentrated water on the high-pressure side of the membrane by applying pressure on one side of the reverse osmosis membrane. With the popularization and application of seawater desalination technology, there are various types of seawater desalination reverse osmosis membranes on the market at present. In order to select a reverse osmosis membrane meeting use requirements, the reverse osmosis membrane needs to be tested to verify its performance.

[0003] When the reverse osmosis membrane is tested, a plurality of reverse osmosis membranes need to be compared under the same raw water temperature and water quality conditions, and the desalination rate, chemical cleaning period and changes of the desalination rate and pressure difference after chemical cleaning of the reverse osmosis membrane are tested in the process of continuous operation of the reverse osmosis device. Since the raw water quality of various seawater desalination projects is quite different, in order to select a reverse osmosis membrane with optimal performance for specific water quality, continuous operation tests need to be carried out on the project site. At present, there is no container type seawater desalination reverse osmosis membrane testing device which can simultaneously compare a plurality of reverse osmosis membranes and can independently carry out chemical cleaning on each reverse osmosis membrane assembly. CONTENT OF THE UTILITY MODEL

[0004] The application aims to provide a container type seawater desalination reverse osmosis membrane testing device which has the advantages of being capable of simultaneously comparing a plurality of reverse osmosis membranes and independently carrying out chemical cleaning on each reverse osmosis membrane assembly.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a container type seawater desalination reverse osmosis membrane testing device, which comprises a security filter, a high-pressure pump for pressurizing seawater passing through the security filter, an energy recovery device for recovering the energy of seawater passing through the security filter, a booster pump for pressurizing seawater exchanged with concentrated water energy passing through the energy recovery device, and a reverse osmosis membrane assembly for filtering seawater.

[0006] According to the utility model, further, a chemical cleaning water tank containing cleaning liquid and a chemical cleaning water pump are further included, the cleaning liquid in the cleaning water tank enters corresponding reverse osmosis membrane assemblies respectively through the chemical cleaning water pump, and the cleaning liquid is converged into a mother pipe and flows back to the cleaning water tank after passing through the reverse osmosis membrane assemblies, so that cleaning circulation is realized.

[0007] The seawater enters a high-pressure pump after passing through a security filter, and the rest of the seawater enters an energy recovery device to exchange energy with concentrated water and is pressurized by a booster pump before being combined with the seawater pressurized by the high-pressure pump. The combined seawater is divided into three paths and enters each reverse osmosis membrane assembly. The water produced by each reverse osmosis membrane assembly is combined into a water mother pipe and discharged, and the concentrated water is combined into a concentrated water mother pipe and enters the energy recovery device to exchange energy with seawater before being discharged. The cleaning liquid in the cleaning water tank is lifted by a cleaning water pump and then divided into three paths to enter the reverse osmosis membrane assemblies, and the cleaning liquid is combined into a mother pipe and returned to the cleaning water tank after passing through the membrane assemblies.

[0008] According to the utility model, further, the reverse osmosis membrane assemblies are three parallelly arranged, which ensures that the seawater temperature and quality entering each seawater desalination reverse osmosis membrane assembly are the same.

[0009] According to the utility model, further, each reverse osmosis membrane assembly inlet is provided with a valve to adjust the flow, and is provided with a flow meter and a pressure gauge. Each reverse osmosis membrane assembly rear end water outlet is provided with a valve, and is provided with a flow meter and a conductivity meter.

[0010] Optionally, the water mother pipe is connected to a flushing water tank, and the flushing water is lifted by a flushing water pump and then connected to the security filter.

[0011] Optionally, the reverse osmosis membrane assembly is provided with a front end water outlet. Each reverse osmosis membrane assembly front end water outlet pipe is provided with a valve, and is provided with a flow meter and a conductivity meter.

[0012] According to the utility model, further, the reverse osmosis membrane assembly rear end is also provided with a water outlet for monitoring the water quality, and the rear end water outlet is provided with a valve. The front end and rear end water production ratio can be adjusted by adjusting the valves of the front end and rear end water outlets, so that different operating conditions can be simulated.

[0013] According to the utility model, further, the reverse osmosis membrane assembly inlet and the concentrated water outlet are provided with valves, which can be adjusted to ensure that the seawater pressure and flow entering the membrane assembly are set values.

[0014] According to the utility model, further, each reverse osmosis membrane assembly is provided with a separate cleaning water inlet and outlet pipe and a valve, which can realize independent chemical cleaning of a single membrane assembly.

[0015] Optionally, the entire test device can be installed in a container.

[0016] The technical effect and advantage of the present application is that the container type seawater desalination reverse osmosis membrane testing device can compare multiple reverse osmosis membranes under the same raw water temperature and water quality conditions, test the desalination rate and chemical cleaning period of the reverse osmosis membrane during the continuous operation of the reverse osmosis device, and provide a basis for selecting a reverse osmosis membrane that meets the use requirements. Moreover, the testing device can be installed in a container, facilitating transportation and continuous operation test on the project site. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The container type seawater desalination reverse osmosis membrane testing device flow chart. DETAILED DESCRIPTION

[0018] The present application will be further described below in combination with specific embodiments.

[0019] Figure 1 The container type seawater desalination reverse osmosis membrane testing device flow chart. The container type seawater desalination reverse osmosis membrane testing device comprises a security filter 1, a high-pressure pump 2, a booster pump 3, a reverse osmosis membrane assembly 4, an energy recovery device 5, a flushing water tank 6, a flushing water pump 7, a chemical cleaning water tank 8, and a chemical cleaning water pump 9.

[0020] The security filter 1 has a seawater inlet. After the seawater enters the inlet of the security filter 1, part of the seawater enters the high-pressure pump 2 for pressurization, and the remaining part enters the energy recovery device 5 for energy exchange with concentrated water and is pressurized by the booster pump 3 before being combined with the seawater pressurized by the high-pressure pump 2. The combined seawater is divided into three parts and enters the corresponding reverse osmosis membrane assembly 4. The water produced by each reverse osmosis membrane assembly 4 is collected into a water mother pipe, and the concentrated water is collected into a concentrated water mother pipe and then enters the energy recovery device 5 for energy exchange with seawater before being discharged. The cleaning liquid in the cleaning water tank 8 is lifted by the cleaning water pump 9 and then divided into three parts to enter the corresponding reverse osmosis membrane assembly 4. The cleaning liquid is combined into a mother pipe after passing through the reverse osmosis membrane assembly 4 and is returned to the cleaning water tank 8. Each reverse osmosis membrane assembly 4 is provided with a valve for adjusting the flow rate, as well as a flow meter and a pressure gauge. The outlet of each reverse osmosis membrane assembly 4 is provided with a valve, as well as a flow meter and a conductivity meter. The water mother pipe is also connected to the flushing water tank 6, and the flushing water is lifted by the flushing water pump 7 and then connected to the front of the security filter 1. The reverse osmosis membrane assembly 4 is provided with a front water outlet. The front water outlet pipe of each reverse osmosis membrane assembly is provided with a valve, as well as a flow meter and a conductivity meter.

[0021] When testing, different reverse osmosis membranes are installed in each reverse osmosis membrane assembly, and pressurized seawater enters each reverse osmosis membrane assembly to ensure that the seawater entering each membrane assembly is of the same quality. By adjusting the inlet valves of each membrane assembly, the seawater pressure and flow entering the membrane assembly can be ensured to be set values. By adjusting the outlet valves of each membrane assembly and the concentrated water side, the water production of the reverse osmosis membrane assembly can be adjusted. The water production conductivity is obtained through the conductivity meter at the outlet of the reverse osmosis membrane assembly, so as to calculate the desalination rate of each reverse osmosis membrane assembly. By opening and adjusting the front-end water outlet valve of the reverse osmosis membrane assembly, the proportion of the front-end and rear-end water outlet of the reverse osmosis membrane assembly can be adjusted, and the conductivities of the front-end and rear-end water production are measured by the conductivity meter.

[0022] When the reverse osmosis test device needs to be shut down, first stop the high-pressure pump and the booster pump, then open the flushing water pump, and flush the reverse osmosis membrane assembly with fresh water to avoid crystallization of seawater in the membrane assembly during shutdown.

[0023] As the reverse osmosis membrane test device operates, the seawater reverse osmosis membrane is contaminated, and the pressure difference between the inlet side and the concentrated water side gradually increases. When the pressure difference reaches the set value, chemical cleaning of the reverse osmosis membrane assembly is performed. When chemical cleaning is performed, the chemical cleaning water pump is started, and the inlet and outlet valves of the reverse osmosis membrane assembly that need to be chemically cleaned are opened to achieve separate cleaning of each reverse osmosis membrane assembly. The chemical cleaning period of each reverse osmosis membrane assembly, the desalination rate before and after chemical cleaning, and the pressure difference change are recorded, so that the anti-pollution performance and chemical cleaning recovery of each reverse osmosis membrane assembly can be obtained.

[0024] The above is only a preferred embodiment of the present application, and is not any form or substantial limitation of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the method of the present application, some improvements and supplements can be made, which should also be considered as the protection range of the present application. For those skilled in the art, without departing from the spirit and scope of the present application, some changes, modifications and equivalent changes can be made based on the disclosed technical content, which are equivalent embodiments of the present application; at the same time, any equivalent changes, modifications and evolution of the above-mentioned embodiments according to the essential technology of the present application are still within the scope of the technical scheme of the present application.

Claims

1. A containerized seawater reverse osmosis membrane testing device, characterized in that, The device comprises a security filter, a high-pressure pump for pressurizing seawater passing through the security filter, an energy recovery device for recovering the energy of seawater passing through the security filter, a booster pump for pressurizing seawater passing through the energy recovery device and exchanging energy with concentrated water, and a reverse osmosis membrane assembly for filtering seawater; Part of the seawater passing through the security filter is pressurized by the high-pressure pump, and the rest of the seawater is pressurized by the booster pump after exchanging energy with concentrated water in the energy recovery device, and then is combined with the seawater pressurized by the high-pressure pump; the combined seawater enters corresponding reverse osmosis membrane assemblies; the water produced by each reverse osmosis membrane assembly is collected into a water mother pipe, and the concentrated water is collected into a concentrated water mother pipe and then is discharged after exchanging energy with seawater in the energy recovery device.

2. The container-type seawater reverse osmosis membrane testing device according to claim 1, characterized in that, The device further comprises a flushing water tank and a flushing water pump, and the water in the water mother pipe enters the flushing water tank and then enters the security filter through the flushing water pump.

3. The container-type reverse osmosis membrane testing apparatus according to claim 1 or 2, wherein The device further comprises a chemical cleaning water tank containing cleaning liquid and a chemical cleaning water pump, and the cleaning liquid in the cleaning water tank enters corresponding reverse osmosis membrane assemblies through the chemical cleaning water pump, and then is collected into a mother pipe and flows back to the cleaning water tank, realizing cleaning circulation.

4. The container-type seawater reverse osmosis membrane testing apparatus according to claim 1, wherein The three reverse osmosis membrane assemblies are connected in parallel, ensuring that the seawater entering each seawater desalination reverse osmosis membrane assembly has the same temperature and quality.

5. The container-type seawater reverse osmosis membrane testing apparatus according to claim 1, wherein Valves are arranged at the inlet of the reverse osmosis membrane assembly and the concentrated water outlet, and the seawater pressure and flow entering the membrane assembly can be adjusted to a set value through the valves.

6. The containerized reverse osmosis membrane testing device of claim 1, wherein, The reverse osmosis membrane assembly is provided with two water outlets at the front end and the rear end, and the water quality of the produced water can be monitored. Valves are arranged at the front end and the rear end, and the proportion of the produced water at the front end and the rear end can be adjusted by adjusting the valves to simulate different operating conditions.

7. The container-type seawater reverse osmosis membrane testing apparatus according to claim 1, wherein Each reverse osmosis membrane assembly is provided with a separate cleaning water inlet and outlet pipeline and a valve, and independent chemical cleaning of a single membrane assembly can be realized.

8. The containerized reverse osmosis membrane testing device of claim 1, wherein, The testing device is arranged in a container.

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