CN210473624U

CN210473624U - Novel reverse osmosis system adopting turbine type energy recovery

Info

Publication number: CN210473624U
Application number: CN201921016988.5U
Authority: CN
Inventors: 陆天怡; 席雨; 吴迪
Original assignee: Safbon Water Service Holding Inc Shanghai
Current assignee: Safbon Water Service Holding Inc Shanghai
Priority date: 2019-07-02
Filing date: 2019-07-02
Publication date: 2020-05-08
Anticipated expiration: 2029-07-02

Abstract

The utility model discloses a novel reverse osmosis system adopting turbine type energy recovery, which comprises a reverse osmosis water supply pump, a security filter, a reverse osmosis high-pressure pump, a first-level osmosis unit and a turbine type energy recovery device, and can be applied to large-scale seawater desalination plants, and on one hand, the recovery rate of the reverse osmosis system can be improved (about from 40% to 60%); on the other hand, the investment cost and the operation cost of the seawater desalination plant can be reduced through the design of the turbine type energy recovery device; in addition, the concentration ratio of the concentrated water can be improved, so that the concentrated water with higher concentration can be obtained, and the concentrated water has higher utilization value. Therefore, the problem of ecological environment protection caused by the offshore discharge of strong brine is solved, the economic benefit of a seawater desalination plant can be improved, and the cost of seawater desalination is reduced.

Description

Novel reverse osmosis system adopting turbine type energy recovery

Technical Field

The utility model relates to a water purification, desalination processing system's technical field, especially a novel reverse osmosis system who adopts turbine formula energy recuperation, in particular to system architecture.

Background

Water is a source of life, and water shortage is one of the most serious challenges in the development of the world today. Over 97% of water resources on earth exist in the form of seawater, and fresh water resources available for human beings are very limited. Since the twentieth century, with the rapid increase in population and the continuous development of industry, rivers are heavily polluted, and underground water and surface water are over-exploited, resulting in the availability of less and less water resources. The desalination of seawater and brackish water is an important way for relieving the problem of water resource shortage. The reverse osmosis membrane method for sea water desalination accounts for more than two thirds of the total installed capacity of the whole world, and the proportion tends to be further increased in the future.

The sea salt is produced in large quantities in coastal areas of China, and in recent years, the salt production area is continuously reduced due to the land occupation of the industry in various areas, the construction of gardens and other reasons, so that the sea salt yield of China is reduced to some extent. The seawater desalination strong brine contains a large amount of raw salt (sodium chloride), and substances such as magnesium, potassium, sulfur, bromine and the like, which are also important raw materials for salt chemical engineering.

Disclosure of Invention

The utility model aims to provide a novel reverse osmosis system adopting turbine type energy recovery, which improves the recovery rate of the reverse osmosis system; the investment cost and the operation cost of a seawater desalination plant are reduced; the concentration ratio of the concentrated water can be improved, so that the concentrated water with higher concentration can be obtained, and the concentrated water has higher utilization value.

In order to realize the purpose, the technical scheme of the utility model is that: a novel reverse osmosis system adopting turbine type energy recovery comprises a reverse osmosis water supply pump 1, a security filter 2, a reverse osmosis high-pressure pump 3, a first-stage osmosis unit 4 and a turbine type energy recovery device 5, wherein the first-stage osmosis unit 4 comprises a first-stage osmosis first-stage 6 and a first-stage osmosis second-stage 7, a water outlet of the reverse osmosis water supply pump 1 is connected with a water inlet of the security filter 2 through a pipeline, a water outlet of the security filter 2 is connected with a water inlet of the reverse osmosis water supply pump 1 through a pipeline, a water outlet of the reverse osmosis water supply pump 1 is connected with a water inlet of the first-stage osmosis first-stage 6, a concentrated water outlet of the first-stage osmosis first-stage 6 is connected with a water inlet of the first-stage osmosis second-stage 7 through a pipeline, a fresh water outlet of the first-stage osmosis first-stage 6 is connected with a fresh water pipeline 9, and a, the fresh water outlet of the first-stage permeation two-section 7 is connected with a second-stage fresh water pipeline 10, a first-stage fresh water pipeline 9 and the second-stage fresh water pipeline 10 are converged on a total fresh water pipeline, the concentrated water outlet of the first-stage permeation two-section 7 is connected with the water inlet of the turbine type energy recovery device 5 through a pipeline, a stable compensator can be further arranged on the pipeline, the stable compensator is used for buffering the supplied water to ensure that a water supply system does not generate negative pressure, the low-pressure water outlet of the turbine type energy recovery device 5 is connected with a concentrated water tank 13 through a concentrated water recovery pipeline 11, and the turbine type energy recovery device 5 is connected with a reverse osmosis high-pressure pump 3 through a pressure conveying pipeline 12.

The utility model discloses a novel reverse osmosis system adopting turbine type energy recovery, which is applied to large-scale seawater desalination plants, and can improve the recovery rate of the reverse osmosis system (about from 40% to 60%); on the other hand, the investment cost and the operation cost of the seawater desalination plant can be reduced through the design of the turbine type energy recovery device; in addition, the concentration ratio of the concentrated water can be improved, so that the concentrated water with higher concentration can be obtained, and the concentrated water has higher utilization value. Therefore, the problem of ecological environment protection caused by the offshore discharge of strong brine is solved, the economic benefit of a seawater desalination plant can be improved, and the cost of seawater desalination is reduced.

Drawings

Fig. 1 is a schematic diagram of the system structure of the present invention.

Detailed Description

The invention will be further described with reference to the accompanying drawings.

The utility model discloses an adopt turbine formula energy recuperation's novel reverse osmosis system, it lies in different from prior art: the system comprises a reverse osmosis water supply pump 1, a cartridge filter 2, a reverse osmosis high-pressure pump 3, a first-stage osmosis unit 4 and a turbine type energy recovery device 5, wherein the first-stage osmosis unit 4 comprises a first-stage osmosis first-stage 6 and a first-stage osmosis second-stage 7, a water outlet of the reverse osmosis water supply pump 1 is connected with a water inlet of the cartridge filter 2 through a pipeline, a water outlet of the cartridge filter 2 is connected with a water inlet of the reverse osmosis water supply pump 1 through a pipeline, a water outlet of the reverse osmosis water supply pump 1 is connected with a water inlet of the first-stage osmosis first-stage 6 through a pipeline, a concentrated water outlet of the first-stage osmosis first-stage 6 is connected with a water inlet of the first-stage osmosis second-stage 7 through a pipeline, a fresh water outlet of the first-stage osmosis first-stage 6 is connected with, the fresh water outlet of the first-stage permeation two-section 7 is connected with a second-stage fresh water pipeline 10, a first-stage fresh water pipeline 9 and the second-stage fresh water pipeline 10 are converged on a total fresh water pipeline, the concentrated water outlet of the first-stage permeation two-section 7 is connected with the water inlet of the turbine type energy recovery device 5 through a pipeline, the low-pressure water outlet of the turbine type energy recovery device 5 is connected with a concentrated water tank 13 through a concentrated water recovery pipeline 11, and the turbine type energy recovery device 5 is connected with the reverse osmosis high-pressure pump 3 through a pressure conveying pipeline 12.

In specific implementation, the water outlet of the concentrated water tank 13 is connected with the mechanical recompression evaporator through a pipeline.

In specific implementation, the water outlet of the concentrated water tank 13 is connected with the electrodeposition tank through a pipeline, metal ions are removed in the electrodeposition tank, and organic matters are oxidized into inorganic matters to realize COD degradation.

In specific implementation, the seawater enters a reverse osmosis water supply pump, a cartridge filter and a reverse osmosis high-pressure pump after being pretreated, and a turbine type energy recovery device is arranged at the reverse osmosis high-pressure pump; two sections of filtration are arranged in the reverse osmosis system, namely, the concentrated water at the first section is filtered again as the inlet water at the second section after passing through the inter-section booster pump, the produced water at the first section and the produced water at the second section are collected together to be used as the first-stage reverse osmosis produced water, and the concentrated water at the second section transfers the energy to the first-stage inlet end through the turbine type energy recovery device and then becomes the low-pressure concentrated brine to be recycled.

Compared with the traditional one-stage reverse osmosis system configuration, the system increases the second stage filtration so as to improve the recovery rate of the reverse osmosis system (about 40 percent to 60 percent), changes the traditional PX type energy recovery device into a turbine type energy recovery device, and eliminates a booster pump at the rear end of the energy recovery device. Not only improves the recovery rate of the whole plant, but also reduces the investment and the operation cost. The concentrated ratio of the concentrated water is improved, so that the concentrated brine is tedded to prepare salt, extract salt chemical raw materials such as bromine, magnesium, potassium and the like, the ecological environment-friendly problem caused by offshore discharge of the concentrated brine is avoided, the economic benefit of a seawater desalination plant can be improved, and the cost of seawater desalination is reduced.

The foregoing is a more detailed description of the invention, taken in conjunction with the accompanying preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described above. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims

1. A novel reverse osmosis system adopting turbine type energy recovery is characterized in that: the system comprises a reverse osmosis water supply pump (1), a security filter (2), a reverse osmosis high-pressure pump (3), a first-stage osmosis unit (4) and a turbine type energy recovery device (5), wherein the first-stage osmosis unit (4) comprises a first-stage osmosis one-stage (6) and a first-stage osmosis two-stage (7), the water outlet of the reverse osmosis water supply pump (1) is connected with the water inlet of the security filter (2) through a pipeline, the water outlet of the security filter (2) is connected with the water inlet of the reverse osmosis water supply pump (1) through a pipeline, the water outlet of the reverse osmosis water supply pump (1) is connected with the water inlet of the first-stage osmosis one-stage (6) through a pipeline, the first-stage osmosis one-stage concentrated water outlet of the first-stage osmosis one-stage (6) is connected with the water inlet of the first-stage osmosis two-stage (7) through a pipeline, the fresh water outlet of the first-stage osmosis one The device is provided with an intersegment booster pump (8), a fresh water outlet of a first-stage permeation two-stage (7) is connected with a two-stage fresh water pipeline (10), a one-stage fresh water pipeline (9) and the two-stage fresh water pipeline (10) are converged on a total fresh water pipeline, a concentrated water outlet of the first-stage permeation two-stage (7) is connected with a water inlet of a turbine type energy recovery device (5) through a pipeline, a low-pressure water outlet of the turbine type energy recovery device (5) is connected with a concentrated water pool (13) through a concentrated water recovery pipeline (11), and the turbine type energy recovery device (5) is connected with a reverse osmosis high-pressure pump (3) through a pressure conveying pipeline (12).

2. The novel reverse osmosis system with turbine energy recovery according to claim 1, wherein: the lift of the intersegmental booster pump (8) is 1.5MPa-2.5 MPa.