CN112441667A

CN112441667A - Portable pressurizing device of seawater desalination equipment

Info

Publication number: CN112441667A
Application number: CN201910805717.6A
Authority: CN
Inventors: 杨清淇; 杨德明
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-08-29
Filing date: 2019-08-29
Publication date: 2021-03-05

Abstract

The invention relates to a pressurizing device of portable seawater desalination equipment, which comprises a high-pressure gas storage unit, an interface unit, a water tank unit, an RO membrane sealing unit and an air bag unit, wherein the device is driven by high-pressure gas to generate pressure difference required by the operation of the RO membrane equipment, so that the equipment based on the RO membrane can operate on the water inlet side without electric energy pressurization or mechanical energy pressurization.

Description

Portable pressurizing device of seawater desalination equipment

Technical Field

The invention relates to the technical field of seawater desalination, in particular to a pressurizing device of portable seawater desalination equipment.

Background

After decades of development, the current seawater desalination technology is mature day by day, and mainly comprises two technologies, namely a thermal method and a membrane method. The hot method seawater desalination is divided into two technologies of multi-stage flash evaporation and multi-effect distillation, and the membrane method seawater desalination is divided into two technologies of reverse osmosis and electrodialysis. Among them, the reverse osmosis method is currently the most important seawater desalination method.

Although the existing seawater desalination technology is developed more and more mature, the existing equipment is generally large-scale equipment at present, and has the defects of large energy consumption, high cost, large-scale supporting equipment requirement, inconvenience in movement and the like in different degrees. For the market of portable seawater desalination plants with a huge demand, the most viable and mature portable technology is reverse osmosis technology with RO membranes as the basic element. At present, the existing small-sized seawater desalination devices on the market are basically based on R0 membranes, and the appearance size of the smallest volume is about 640X 500X 500 mm.

The reverse osmosis process employs an RO membrane as a key component. The RO membrane water inlet and water outlet sides can work only by a certain pressure difference, and in order to generate the pressure difference, mechanical pressurization or electric pressurization devices are adopted in the related inventions of the sea water desalination equipment which can be searched at present. The known mechanical pressurizing device consists of a pressure rod, a connecting rod, a piston and other parts which can bear certain pressure, greatly increases the weight and the volume of the seawater desalting equipment, and is completely not suitable for the portable requirement; the known electric pressurizing device consists of components such as an electric energy driven high-pressure pump, a fixed power supply or a large-capacity battery and the like, wherein the fixed power supply is not suitable for the requirements of portable application scenes, and the battery is easy to enter water and short-circuit or absorb heat to self-explode in a seawater environment and is very unsafe to carry. The weight and the volume of the peripheral equipment such as a battery, a high-pressure pump and the like are also greatly increased.

In view of the above, the present inventors have made extensive studies and research in order to overcome the drawbacks and inconveniences caused by the perfection of the design of the pressurizing device in the conventional portable seawater desalination plant based on RO membranes.

Disclosure of Invention

The invention aims to provide a small-size, light-weight and high-efficiency pollution-free pressurizing device for seawater desalination equipment, so as to replace the original mechanical pressurizing device or electric pressurizing device in portable seawater desalination equipment based on an RO membrane. The device can embed the key components of the seawater desalination equipment, namely the preposed filtering material and the RO membrane, so that the energy storage process is separated from the working scene, and the energy storage component is separated from other components, thereby greatly enhancing the portability of the equipment.

In order to achieve the above purpose, the solution of the invention is: a pressurizing device of seawater desalination equipment comprises a high-pressure gas storage unit, an interface unit, a water tank unit, an RO membrane sealing unit and an air bag unit. The high-pressure gas storage unit is connected with the air bag unit through the interface unit, and the interface unit and the water tank unit form a sealed working cavity. The air bag unit and the RO membrane sealing unit are inside the water tank unit. When the RO membrane water tank works, gas in the high-pressure gas storage unit is reduced in pressure through the interface unit and enters the air bag unit, water in the water tank unit is extruded after the air bag unit expands, pressure difference required by the RO membrane work is achieved, and the gas enters the RO membrane sealing unit through the front-arranged filtering chamber in the water tank unit.

The high-pressure gas storage unit comprises a high-pressure gas cylinder, a gas cylinder switch, a hose, a gas cylinder core and an external threaded head. The two ends of the gas cylinder switch are respectively connected with the high-pressure gas cylinder and the hose, one end of the hose is connected with the gas cylinder switch, the other end of the hose is connected with the valve core, and one end of the valve core is connected with the external threaded head and communicated with the interface unit. When the external thread joint is not connected to the interface unit, the valve core is closed, and gas cannot pass through; when the external threaded head is connected to the interface unit, the valve core is opened, the gas cylinder switch is opened at the moment, and gas in the high-pressure gas cylinder enters the interface unit.

Further, the gas cylinder switch and the hose are connected through threads, and the gas cylinder switch can be rapidly detached or screwed.

The interface unit comprises an airtight connector, a pressure reducing valve, a pressure relief switch, a sealed front cover and a work indicating module. The sealing front cover forms a seal with the water tank unit. One end of the pressure relief switch is connected with the pressure relief valve, and the other end of the pressure relief switch is connected with the air bag unit. One end of the airtight connector is connected with an external threaded head in the high-pressure gas storage unit, the other end of the airtight connector is connected with the pressure reducing valve, and one end of the pressure reducing valve is connected with the pressure relief switch. The work indication module comprises a transparent window, a spring and a stroke push rod. After the high-pressure gas passes through the interface unit, the pressure is reduced to be the pressure required by the RO membrane to work, the gas enters the gas bag unit, the volume of the gas bag is expanded to the rated size, and the work indication module indicates that the work of the gas bag is finished.

Furthermore, the output pressure of a pressure reducing valve in the interface unit can be adjusted to be 0.5Mpa to 1Mpa, and the output pressure can be adjusted according to the working pressure of the RO membrane which is selected to be installed.

The air bag unit comprises at least one rubber air bag and an air inlet pipeline, one end of the air inlet pipeline is connected with an air inlet channel on the interface unit, and the other end of the air inlet pipeline is connected with the rubber air bag. The decompressed gas enters the rubber air bag to squeeze water in the water tank unit, and a certain water pressure is formed.

Furthermore, the air bag in the air bag unit is made of elastic materials, the air bag expands to the maximum extent when being inflated to fill the water inlet cavity of the water inlet tank unit, and automatically restores to the minimum volume when being deflated.

The water tank unit comprises a front filter chamber, a RO membrane sealing unit mounting support, a water chamber, a water tank shell and a water tank rear cover module, wherein the RO membrane sealing unit comprises a RO membrane sealing chamber, a RO membrane sealing shell and a RO membrane pure water/wastewater dual-purpose channel. The air bag unit is inflated to squeeze water in the water inlet chamber, so that the water has pressure capable of driving the RO membrane to work, and the water reaches the RO membrane sealing unit through the pre-filtering chamber. The water outlet end of the RO membrane sealing unit is connected and sealed with the through hole on the rear cover module of the water inlet chamber, and the generated pure water and the waste water respectively flow out through the rear cover of the water tank.

Further, leading filter chamber in the jar unit of intaking possesses and takes 80X60 mm's installation space, can install the leading cotton material of filter PP of 0.5 micron/0.1 micron additional, or other leading filter material.

Furthermore, the RO membrane sealing unit is arranged on the mounting bracket in the water inlet tank unit, the water inlet side is high-pressure, and the water outlet side is low-pressure. And the RO membrane sealing unit forms a seal with a water outlet through hole formed in the rear cover of the water tank.

Further, the RO membrane sealing unit may incorporate an RO membrane of a mounting specification of 50G.

The invention also discloses a water inlet side pressurizing method of the portable seawater desalination equipment, which comprises the following steps: step S1, generating high-pressure gas by using an air compressor, a manual pressurizing pump, a chemical raw material reaction and the like, and storing the high-pressure gas in at least one portable high-pressure gas cylinder; step S2, connecting the portable high-pressure gas cylinder to an interface unit through a hose; step S3, opening the back cover of the water tank unit, filling the water tank unit with seawater and then covering the back cover of the water tank unit; and step S4, opening a switch of the high-pressure gas storage unit, wherein the high-pressure gas flows into the interface unit, the pressure reducing valve reduces the pressure of the high-pressure gas, the high-pressure gas enters the air bag at a lower pressure, the air bag expands rapidly, and the water in the water tank is squeezed, so that the water in the water tank reaches the water pressure at which the RO membrane can work. The pressurized water flows into the RO membrane sealing unit through the pre-filtration chamber. Step S5, the work indication module prompts the air bag to expand in place, the switch of the high-pressure air storage unit is closed, the pressure relief switch is opened, and the pressure relief switch is closed after the air bag is reset; step S6, opening the rear cover and refilling the seawater, and repeating the steps S3 to S5; and step S7, if the gas in the high-pressure gas cylinder is used up, closing the switch of the high-pressure gas storage unit, replacing the high-pressure gas cylinder, and repeating the steps from S2 to S6.

Further, the high pressure gas cylinder in step S1 may be charged by various methods, and the charged gas is common air. The charging process may be completely separated from the actual working scene of the equipment in steps S2 to S6, and in step S1, a plurality of high pressure gas cylinders may be prepared in advance for replacement in step S7.

After adopting above-mentioned scheme, can be many times, produce the required pressure differential of RO membrane work in the side of intaking quantitatively, and equipment weight and volume all will reduce by a wide margin. The working process of the protection device, wherein high-pressure gas in the device forms working pressure on the water inlet side through decompression and extrusion of the air bag to water, so that water generates pressure difference enabling the RO membrane to work normally, and the device is the core of the whole device. Compared with the prior art, the invention has the following advantages.

The volume is smaller, and the weight is lighter. Under the scheme that mechanical energy or electric energy is replaced by a gas energy storage mode to drive equipment to generate pressure difference, an originally complex and heavy device which is driven by the mechanical energy or electric energy mode to generate the pressure difference is replaced by a light and handy high-pressure gas energy storage device. If the fresh water conversion rate of the RO membrane is 1: 1, 0.5L of fresh water is produced each time, and a 30Mpa and 0.6L high-pressure gas cylinder is equipped for calculation, the total mass of the invention is only about 1.2kg, and the volume is about 200X even more than 80 mm.

The process of gas energy storage is completely separated from the actual working scene, and the complex energy storage process is put outside the actual working scene;

the high-voltage energy storage unit is separated from other components of the invention, the high-voltage energy storage unit has light weight and small volume, and when the high-voltage energy storage unit is used in field work, one person can carry other units, and other persons can carry a plurality of high-voltage energy storage units, thereby producing more pure water.

Can generate pure water for a plurality of times in small batches, has little physical consumption of operators, and accords with working scenes and human physiological characteristics. One gas cylinder can produce about 9L of water in multiple batches by using a high-pressure gas cylinder with the pressure of 30Mpa and the pressure of 0.6L, and the production is 0.5L in one time. Particularly, the high-pressure gas cylinder can be replaced, the gas cylinder is very light in weight and very small in size, about 9L of pure water can be produced by adding one gas cylinder, and the high-pressure gas cylinder is very suitable for scenes of beach action, field hiking, rescue, ship lifesaving and the like of an individual soldier or a small squad.

No electronic device is needed, power supply is not needed, and a series of unsafe factors caused by power supply and electromagnetism are avoided.

The pressurizing device of the portable seawater desalination equipment is internally provided with the RO membrane mounting position and the preposed filtering material mounting position, and a set of complete seawater desalination equipment can be formed by filling the preposed multistage PP cotton or other preposed filtering materials and the RO membrane.

Drawings

Fig. 1 is a schematic view of the general structure of the present invention.

FIG. 2 is a schematic diagram of the high pressure gas storage unit according to the present invention.

FIG. 3 is a schematic diagram of an interface unit structure according to the present invention.

FIG. 4 is a schematic view of the structure of an airbag unit according to the present invention.

Fig. 5 is a schematic structural diagram of a water tank unit in the invention.

FIG. 6 is a schematic view of the structure of the RO membrane sealing unit of the present invention.

Wherein each portion is as follows.

1. A high-pressure gas storage unit; 10. a high pressure gas cylinder; 11. a switch; 12. a hose; 13. a valve core; 14. provided is a threaded joint.

2. An interface unit; 20. an airtight joint; 21. a pressure reducing valve; 22. a pressure relief switch; 23. a front cover of the water tank; 24. an indication module; 24a, a transparent window; 24b, a spring; 24c, a push rod.

3. An airbag unit; 30. an air inlet pipe; 31. an air bag.

4. A water tank unit; 40. a pre-filter chamber; 41. an RO membrane sealing unit mounting bracket; 42. a water chamber; 43. a housing; 44. the rear cover of the water tank; 44a, sealing the water tank; 44b and an outlet pipe.

5. An RO membrane sealing unit; 50. an RO membrane sealed housing; 51. a pure water/wastewater dual-purpose channel; 52. the RO membrane seals the chamber.

Detailed Description

Referring to fig. 1 to 6, the present embodiment provides a pressurizing device of a portable seawater desalination apparatus, which includes a high-pressure gas storage unit 1, an interface unit 2, an airbag unit 3, a water tank unit 4, and an RO membrane sealing unit 5.

The high-pressure gas storage unit 1 comprises a high-pressure gas bottle 10, a switch 11, a hose 12, a valve core 13 and a threaded joint 14. Two ends of the switch 11 are respectively connected with the high-pressure gas cylinder 10 and the hose 12, one end of the hose 12 is connected with the switch 11, the other end of the hose is connected with the valve core 13, and the other end of the valve core 13 is connected with the threaded joint 14. In operation, the threaded connector 14 is connected to the air-tight connector 20 in the interface unit 2. When the nipple 14 is not connected to the airtight nipple 20, the valve core 13 is closed and gas cannot pass through; when the nipple 14 is connected to the airtight nipple 20, the valve core 13 is opened, and the switch 11 is opened, so that the gas in the high-pressure gas cylinder 10 enters the airtight nipple 20. When the high-pressure gas cylinder needs to be replaced, the thread is unscrewed, the hose 12 and the switch 11 are separated, and a new high-pressure gas cylinder 10 is connected.

The interface unit 2 comprises an airtight connector 20, a pressure reducing valve 21, a pressure relief switch 22, a water tank front cover 23 and an indicating module 24. The front cover 22 of the water tank is hermetically connected with the outer shell 43, one end of the airtight joint 20 is connected with the threaded joint 14, the other end is connected with the pressure reducing valve 21, one end of the pressure relief switch 22 is connected with the pressure reducing valve 21, and the other end is connected with the air inlet pipe 30 in the air bag unit 3. The indicating module comprises a transparent window 24a, a spring 24b and a push rod 24 c. When the air bag 31 is reset, the push rod 24c is far away from the transparent window 24a under the pressure of the spring, and when the air bag 31 is expanded to the rated size, the push rod 24c is close to the transparent window 24a under the pressure of the air bag. During operation, after passing through the pressure reducing valve 21, the high-pressure gas is reduced to the pressure required by the operation of the RO membrane, enters the air bag 31, the volume of the air bag 31 is expanded to the rated size, the push rod 24c of the operation indicating module is driven to move upwards, and the expansion process of the air bag 31 is indicated to be completed. The pressure release switch 22 is opened, and the airbag 31 is reset.

The airbag unit 3 includes an intake duct 30 and an airbag 31. One end of the air inlet pipe 30 is connected with the pressure relief switch 22 on the interface unit 2, and the other end is connected with the air bag 31. The decompressed gas enters the air bag 31 and presses water in the water cavity 42 to form a certain water pressure. The air bag 31 is made of elastic material, and is expanded to fill the water cavity 42 to the maximum when inflated, and automatically returns to the minimum volume when reset.

The pitcher unit 4 comprises a pre-filter 40, an RO membrane seal unit mounting bracket 41, a water chamber 42, a housing 43, and a pitcher back cover 44. After the water chamber 42 is filled with water, the switch 11 is turned on, the air bag 31 is inflated to squeeze the water in the water chamber 42, so that the water has a pressure capable of driving the RO membrane to work. The water passes through the prefilter chamber 40 and enters the RO membrane sealing unit 5. The housing 43 forms a seal with the water tank front cover 22, the housing 43 forms a seal with the water tank seal 44a in the water tank rear cover 44, the RO membrane seal unit 5 is mounted on the RO membrane seal unit mounting bracket 41, and the dual-purpose pure water/wastewater channel 51 in the RO membrane seal unit 5 forms a seal with the water outlet pipe 44b in the water tank rear cover 44. The front filter cavity 40 is provided with an installation space which is 80X60mm in the middle, and can be additionally provided with a front filter PP cotton material of 0.5 micron/0.1 micron or other front filter materials.

The RO membrane sealing unit 5 includes an RO membrane seal housing 50, a pure water/waste water dual-purpose passage 51, and an RO membrane seal chamber 52. The RO membrane sealing housing 50 is mounted on the RO membrane sealing unit mounting bracket 41, the pure water/wastewater dual-purpose channel 51 forms a seal with the water outlet pipe 44b in the water tank rear cover 44, the water inlet side is high pressure, the water outlet side is low pressure, and a RO membrane with the mounting specification of 50G can be built in. When the water in the water chamber 42 is pressed by the air bag 31 to form a pressure difference, the water is pressed into the RO membrane sealed chamber 52, and the treated pure water and the treated waste water respectively flow out of the pure water/waste water dual-purpose channel 51.

The pressurizing device of the portable seawater desalination equipment is used as follows.

And step S1, installing 0.5 micron/0.1 micron pre-filtering PP cotton material in the pre-filtering chamber 40, and installing the RO membrane with the specification of 50G in the RO membrane sealing chamber 52.

And step S2, generating high-pressure gas by using an air compressor, a manual pressurizing pump, a chemical raw material reaction and the like, and storing the high-pressure gas in the high-pressure gas bottle 10.

Step S3, the screw joint 14 in the high pressure gas storage unit is connected to the airtight joint 20 in the interface unit 2.

Step S4 is to open the water tank rear cover 44 of the water tank unit 4, fill the water chamber 42 with seawater and then cover the water tank rear cover 44.

And step S5, opening the switch 11 in the high-pressure gas storage unit, wherein the high-pressure gas flows into the pressure reducing valve 21, the pressure reducing valve 21 reduces the pressure of the high-pressure gas, the high-pressure gas enters the air bag 31 at a lower pressure, and the air bag 31 rapidly expands to enable the water in the water cavity 42 to reach the water pressure at which the RO membrane can work. The water in the water chamber 42 flows into the RO membrane sealing unit 5 through the pre-filter chamber 40, and after being filtered by the RO membrane, pure water and waste water are formed, and then flow out from the water outlet pipe 44b in the water tank rear cover 44 respectively.

Step S6, the air bag 31 is inflated to fill the water cavity 42, the indication module 24 prompts the air bag 31 to be inflated in place, the switch 11 is closed, the pressure relief switch 22 is opened, and the pressure relief switch 22 is closed after the air bag 31 is reset.

Step S7, opening the rear cover 44 of the water tank, refilling the water chamber 42 with seawater, and repeating the steps S4 to S6.

And step S8, if the gas in the high-pressure gas cylinder 10 is used up, closing the switch 11, replacing the high-pressure gas cylinder 10, and repeating the steps from S3 to S7.

The present invention has been described in detail so as to enable those skilled in the art to understand the contents of the present invention and to practice the same. The above embodiments and drawings are not intended to limit the form and style of the present invention, and any suitable changes or modifications made therein in accordance with the spirit and substance of the present invention should not be construed as departing from the scope of the present invention.

Claims

1. A pressurizing device of portable seawater desalination equipment is characterized by comprising: the high-pressure air storage unit is connected with the air bag unit through the interface unit, the interface unit and the water tank unit form a sealed working chamber, the air bag unit and the RO membrane sealing unit are arranged in the water tank unit, gas in the high-pressure air storage unit is depressurized through the interface unit during working, and enters the air bag unit, water in the water tank unit is extruded after the air bag unit expands, so that the pressure difference required by the operation of the RO membrane is achieved, and the gas enters the RO membrane sealing unit through a front filter chamber in the water tank unit.

2. The pressurizing device of a seawater desalination plant as defined in claim 1, wherein: the high-pressure gas storage device comprises a high-pressure gas storage unit, wherein the high-pressure gas storage unit comprises at least one high-pressure gas cylinder, a gas cylinder switch, a hose, a valve core and an external threaded head, two ends of the gas cylinder switch are respectively connected with the high-pressure gas cylinder and the hose, one end of the hose is connected with the gas cylinder switch, one end of the hose is connected with the valve core, and one end of the valve core is connected with the external threaded head.

3. The pressurizing device of a seawater desalination plant as defined in claim 2, wherein: the gas cylinder switch is connected with the hose through threads, and can be rapidly disassembled or screwed.

4. The pressurizing device of a seawater desalination plant as defined in claim 1, wherein: including an interface unit, this interface unit includes an airtight joint, a relief pressure valve, a pressure release switch, a water pitcher protecgulum, a work indication module, the water pitcher protecgulum forms sealedly with the water pitcher unit, the relief pressure valve is connected to pressure release switch, one end, and the gasbag unit is connected to one end:

one end of the airtight connector is connected with an external threaded head in the high-pressure gas storage unit, one end of the airtight connector is connected with the pressure reducing valve, one end of the pressure reducing valve is connected with the pressure relief switch, and the work indicating module comprises a transparent window, a spring and a stroke push rod.

5. The pressurizing device of a seawater desalination plant as defined in claim 4, wherein: the pressure reducing valve in the interface unit can adjust the output pressure.

6. The pressurizing device of a seawater desalination plant as defined in claim 1, wherein: the air bag unit comprises at least one rubber air bag and an air inlet pipeline, wherein one end of the air inlet pipeline is connected with a pressure relief switch on the interface unit, and the other end of the air inlet pipeline is connected with the rubber air bag.

7. The pressurizing device of a seawater desalination plant as defined in claim 6, wherein: the air bags in the air bag units are made of elastic materials, and are expanded to the maximum extent when inflated to fill the water inlet cavity of the water inlet tank unit, and automatically recovered to the minimum volume when deflated.

8. The pressurizing device of a seawater desalination plant as defined in claim 1, wherein: including a water pitcher unit, this water pitcher unit covers the module after including leading filter chamber, a RO membrane seal unit installing support, a water cavity, a water pitcher casing, a water pitcher, still includes a RO membrane seal unit, and this RO membrane seal unit includes a RO membrane seal chamber, a RO membrane seal casing, a RO membrane pure water/waste water double-purpose passageway.

9. The pressurizing device of a seawater desalination plant as defined in claim 8, wherein: leading filter chamber in the pitcher unit possesses and takes 80X60 mm's installation space, can install 0.5 micron/0.1 micron leading filtration PP cotton material additional, or other leading filter material, RO membrane seal unit install advance on the installation support of pitcher unit inside, RO membrane seal unit can embed the RO membrane that the installation specification is 50G.

10. A method for pressurizing a water inlet side of portable seawater desalination equipment comprises the following steps: step S1, generating high-pressure gas by using an air compressor, a manual pressurizing pump, a chemical raw material reaction and the like, and storing the high-pressure gas in at least one portable high-pressure gas cylinder; step S2, connecting the portable high-pressure gas cylinder to an interface unit through a hose; step S3, opening the back cover of the water tank unit, filling the water tank unit with seawater and then covering the back cover of the water tank unit; step S4, opening a switch of the high-pressure gas storage unit, wherein the high-pressure gas flows into the interface unit, the pressure reducing valve reduces the pressure of the high-pressure gas, the high-pressure gas enters the air bag at a lower pressure, the air bag expands rapidly, water in the water tank is squeezed, the water in the water tank reaches the water pressure at which the RO membrane can work, and the pressurized water flows into the RO membrane sealing unit through the pre-filtering chamber; step S5, the work indication module prompts the air bag to expand in place, the switch of the high-pressure air storage unit is closed, the pressure relief switch is opened, and the pressure relief switch is closed after the air bag is reset; step S6, opening the rear cover and refilling the seawater, and repeating the steps S3 to S5; and step S7, if the gas in the high-pressure gas cylinder is used up, closing the switch of the high-pressure gas storage unit, replacing the high-pressure gas cylinder, and repeating the steps from S2 to S6.

11. The method for pressurizing the water inlet side of a portable seawater desalination apparatus as defined in claim 10, wherein: the high pressure gas cylinder in step S1 may be charged in various ways, the charged gas is ordinary air, the charging process may be completely separated from the actual working scenario of the equipment in steps S2 to S6, and in step S1, a plurality of high pressure gas cylinders may be prepared in advance for replacement in step S7.