Air-to-water device for a seawater desalination plant

Abstract

This utility model discloses an air-to-water device for seawater desalination equipment: the outlet of a high-pressure pump is connected to the seawater inlet of an RO membrane assembly via a pipe; the concentrate outlet of the RO membrane assembly is connected to one end of a water flow pipe; a water impeller is rotatably connected inside the water flow pipe, and the water impeller is coaxially connected to the impeller of a blower; the air outlet of the blower is connected to the air inlet of a vortex tube, and a condenser tube is connected to the cold end of the vortex tube; an RO membrane is installed inside the RO membrane assembly, and a purified water outlet is also provided on the bottom surface of the RO membrane assembly; a drain pipe is connected to the other end of the water flow pipe; and a water collection tray is provided below the condenser tube. This energy recovery device for seawater desalination equipment can not only realize the energy recovery of high-pressure concentrate, but also effectively and stably increase the amount of fresh water using the recovered energy.

Description

Technical Field

[0001] This utility model belongs to the field of seawater desalination, and specifically relates to an air-to-water device for seawater desalination equipment. Background Technology

[0002] Seawater desalination equipment requires a high-pressure pump to provide pressure to the RO membrane. The RO membrane itself requires a large osmotic pressure, which requires a large motor to drive the high-pressure pump. Therefore, the RO membrane produces a large amount of high-pressure concentrate during water production. Most companies, in pursuit of simple structure and low cost, directly discharge this concentrate, which wastes a lot of energy.

[0003] To address the problem of energy waste, energy recovery devices are currently available on the market. These devices work by introducing high-pressure concentrate into a piston-type energy recovery unit. The high-pressure concentrate pushes the piston, increasing the pressure of the RO membrane feed water and thus achieving energy recovery. However, these energy recovery devices have complex structures and are prone to piston jamming. Besides a high failure rate, increasing the RO membrane feed water pressure through piston work also leads to unstable water output from the desalination equipment, failing to consistently increase the desalination capacity. Utility Model Content

[0004] In view of the shortcomings of the prior art described in the background, this utility model provides another energy recovery device for seawater desalination equipment, which can not only realize the energy recovery of high-pressure concentrate, but also effectively and stably increase additional fresh water using the recovered energy.

[0005] The disclosed seawater desalination equipment includes an air-to-water device comprising a high-pressure pump, an RO membrane assembly, a water flow pipe, a water turbine, a fan, a vortex tube, and a condenser tube.

[0006] The outlet of the high-pressure pump is connected to the seawater inlet of the RO membrane assembly via a pipe, and the concentrate outlet on the side of the RO membrane assembly is connected to one end of the water flow pipe.

[0007] A water impeller is rotatably connected inside the water flow pipe. The water impeller is coaxially connected to the impeller of the fan. The air outlet of the fan is connected to the air inlet of the vortex tube. The cold end of the vortex tube is connected to a condenser tube.

[0008] Furthermore, the RO membrane assembly is equipped with an RO membrane, and the bottom surface of the RO membrane assembly is also provided with a clean water outlet, so that the clean water obtained after seawater is filtered by the RO membrane can flow out smoothly from the clean water outlet; the other end of the water flow pipe is connected to a drain pipe, so that the high-pressure concentrated water flowing in the water flow pipe can be discharged smoothly; a water receiving tray is provided below the condenser pipe.

[0009] Preferably, the water flow pipe is fixedly connected to the back of the fan casing, and the water turbine shaft extends out of the water flow pipe and is fixedly connected to the fan shaft, thus realizing the coaxial connection between the water turbine and the fan wheel.

[0010] The specific working principle of the above-mentioned air-to-water device is as follows:

[0011] The high-pressure pump is electrically connected to a motor. Driven by the motor, the high-pressure pump pumps seawater into the seawater inlet of the RO membrane assembly. The pressure regulating valve regulates the pressure so that some seawater passes through the RO membrane. Among them, impurities such as salt are filtered by the RO membrane. The purified water flows out through the purified water outlet at the bottom of the RO membrane assembly. The high-pressure concentrate enters the water flow pipe at the back of the blower through the concentrate outlet of the RO membrane assembly and is discharged from the equipment through the drainage pipeline.

[0012] The high-pressure concentrate flowing through the water pipe drives the water turbine inside to rotate. The water turbine's work drives the coaxial fan's impeller to rotate. The air generated by the impeller enters the vortex tube, where the airflow is separated into cold and hot airflows by the vortex tube. The cold airflow enters the condenser tube from the cold end of the vortex tube, and the humid air around the condenser tube is pre-cooled on the outer wall of the condenser tube, condensing into water droplets that drip into the water collection tray, completing the process of air-to-water extraction. This effectively and stably increases the amount of fresh water and recovers the energy of the high-pressure concentrate.

[0013] Through the above technical solutions, this utility model has at least the following beneficial effects:

[0014] The air-to-water device of the seawater desalination equipment described in this application, through the coordinated design of structural components such as water flow pipes, water turbines, fans, vortex tubes, and condenser tubes, not only enables the RO membrane assembly to produce purified water, but also allows the energy of high-pressure concentrate to be recycled to extract water from humid air, thereby effectively and stably increasing the amount of fresh water, making the seawater desalination equipment energy-saving and efficient. Attached Figure Description

[0015] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of this utility model in a schematic manner. Therefore, they only show the components related to this utility model.

[0016] Figure 1 This is a schematic diagram of the overall structure of the air-to-water device of the seawater desalination equipment described in the embodiments of this application.

[0017] Figure 2 for Figure 1 Another perspective of the schematic diagram, namely, the rear structure of the air-to-water device. Detailed Implementation

[0018] In the description of this application, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms describing positional relationships are for illustrative purposes only and should not be construed as limiting this patent. If terms such as "first" and "second" are used for descriptive purposes only, they should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of the stated features. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0019] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0020] refer to Figure 1 and Figure 2 An air-to-water device for seawater desalination equipment includes a high-pressure pump 1, an RO membrane assembly 2, a water flow pipe 3, a water turbine, a blower 4, a vortex tube 5, and a condenser tube 6.

[0021] The outlet of the high-pressure pump 1 is connected to the seawater inlet 201 of the RO membrane assembly 2 via a pipe, and the concentrate outlet 202 on the side of the RO membrane assembly 2 is connected to one end of the water flow pipe 3.

[0022] A water impeller is rotatably connected inside the water flow pipe 3. The water impeller is coaxially connected to the impeller of the fan 4. The air outlet of the fan 4 is connected to the air inlet of the vortex tube 5. The cold end of the vortex tube 5 is connected to a condenser tube 6.

[0023] The RO membrane assembly 2 is equipped with an RO membrane, and the bottom surface of the RO membrane assembly 2 is also provided with a clean water outlet 203, so that the clean water obtained after seawater is filtered by the RO membrane can flow out smoothly from the clean water outlet 203; the other end of the water flow pipe 3 is connected to a drain pipe 7, so that the high-pressure concentrated water flowing in the water flow pipe 3 can be discharged smoothly; a water receiving tray 8 is provided below the condenser pipe 6.

[0024] In this specific embodiment, reference is made to Figure 2The water flow pipe 3 is fixedly connected to the back of the casing of the fan 4. The water wheel shaft inside the water flow pipe 3 extends out of the water flow pipe 3 and is fixedly connected to the shaft of the fan 4, so as to realize the coaxial connection between the water wheel and the fan wheel of the fan 4.

[0025] The specific working principle of the above-mentioned air-to-water device is as follows:

[0026] The high-pressure pump 1 is electrically connected to the motor 101. Driven by the motor 101, the high-pressure pump 1 pumps seawater into the seawater inlet 201 of the RO membrane assembly 2. The pressure regulating valve regulates the pressure so that some seawater passes through the RO membrane. Among them, impurities such as salt are filtered by the RO membrane. The purified water flows out through the purified water outlet 203 at the bottom of the RO membrane assembly 2. The high-pressure concentrate enters the water flow pipe 3 on the back of the blower 4 through the concentrate outlet 202 of the RO membrane assembly 2, and is discharged from the equipment through the drainage pipe 7.

[0027] The high-pressure concentrated water flowing through the water pipe 3 drives the water turbine inside to rotate. The water turbine's work drives the coaxial fan 4 to rotate. The air generated by the fan enters the vortex tube 5, and under the action of the vortex tube 5, the airflow is separated into two streams: cold and hot. The cold airflow enters the condenser tube 6 from the cold end of the vortex tube 5. The humid air around the condenser tube 6 is pre-cooled on the outer wall of the condenser tube 6, condenses into water droplets, and drips into the water collection tray 8, completing the process of air water intake. This effectively and stably increases the amount of fresh water and recovers the energy of the high-pressure concentrated water.

[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Based on the present utility model and the above description, relevant personnel can make various changes and modifications without departing from the technical concept of the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An air-to-water device of a seawater desalination plant, characterized by: It includes a high-pressure pump (1), an RO membrane assembly (2), a water flow pipe (3), a water turbine, a blower (4), a vortex tube (5), and a condenser tube (6); The outlet of the high-pressure pump (1) is connected to the seawater inlet (201) of the RO membrane assembly (2) through a pipe, and the concentrate outlet (202) of the RO membrane assembly (2) is connected to one end of the water flow pipe (3). A water impeller is rotatably connected inside the water flow pipe (3). The water impeller is coaxially connected to the impeller of the fan (4). The air outlet of the fan (4) is connected to the air inlet of the vortex tube (5). The cold end of the vortex tube (5) is connected to a condenser tube (6).

2. The air-to-water device of claim 1, wherein: The RO membrane assembly (2) is equipped with an RO membrane, and the bottom surface of the RO membrane assembly (2) is also equipped with a clean water outlet (203); the other end of the water flow pipe (3) is connected to a drain pipe (7); a water receiving tray (8) is provided below the condenser pipe (6).

3. The air-to-water device of a seawater desalination plant according to claim 1 or 2, characterized in that: The water flow pipe (3) is fixedly connected to the back of the casing of the fan (4), and the water turbine shaft inside the water flow pipe (3) extends out of the water flow pipe (3) and is fixedly connected to the shaft of the fan (4).

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