Portable water production device based on cold and hot driving of vortex tube

Abstract

The invention belongs to the field of seawater desalination, and particularly provides a portable water production device based on cold and hot driving of a vortex tube, the vortex tube in the device can produce instant cold air and hot air, and fresh water can be extracted from seawater according to the difference of air saturation moisture content at different temperatures. The specific process is as follows: hot air flow generated by the vortex tube directly enters the seawater tank filled with seawater to form air flow rich in water vapor, then the air flow enters the condensation tank, the hot air is cooled by cold air generated at the other end of the vortex tube, and meanwhile, water drops are condensed. The device is quick to start, flexible and convenient, and can provide continuous and reliable fresh water under the environmental conditions of islands, fields and the like.

Description

Technical Field

[0001] The invention belongs to the field of seawater desalination, and in particular relates to a portable water production device based on cold and hot drive of a vortex tube. Background Art

[0002] At present, the global seawater desalination technologies mainly include reverse osmosis, low-temperature multi-effect and multi-stage flash evaporation, etc. Reverse osmosis technology is the main application technology in my country's seawater desalination projects, accounting for about 2 / 3 of the scale of national seawater desalination projects.

[0003] Regarding the reverse osmosis technology in seawater desalination, the reverse osmosis membrane is easily contaminated by impurities, microorganisms and organic matter in seawater during long-term operation, and is prone to aging, breakage and other problems, resulting in a decrease in membrane flux and affecting desalination efficiency. Therefore, it needs to be frequently cleaned and replaced, increasing operating costs. The research and development of new membrane materials has been slow, and it is difficult to meet the demand for high-efficiency, low-cost and long-life membrane materials in seawater desalination technology. However, whether it is reverse osmosis technology or other technologies, a lot of energy is consumed. In addition, seawater desalination technology often involves multiple process links and equipment, but the current technical integration is low, there is a lack of effective coordination and optimization between the links, and the overall efficiency is not high.

[0004] Vortex tube refrigeration technology is a technology that uses the vortex effect to achieve refrigeration. The hot and cold air flows with different temperatures at both ends can be used for evaporation and condensation. This technology has the advantages of environmental protection and energy saving, high efficiency and saving, no noise and vibration, safety and reliability, and has been widely used in industrial device cooling, power battery thermal management and thermal systems.

[0005] In this regard, the present invention combines vortex tube refrigeration technology with seawater desalination technology, aiming to use the airflow with temperature difference at both ends of the vortex tube to evaporate seawater and condense fresh water, thereby effectively improving system performance and efficiently obtaining a stable output of fresh water. The advantage of the present invention patent is that by introducing vortex tube refrigeration technology, it helps to optimize the overall performance of the seawater desalination system and increase the output of fresh water. Summary of the invention

[0006] 1. In order to solve the above technical problems, the present invention provides a portable water production device and method based on the hot and cold drive of a vortex tube. The device uses a vortex tube to generate two cold and hot air flows with different temperatures to obtain fresh water. The hot air flow generated by the vortex tube enters a seawater tank filled with seawater to form hot and humid air, which is then collected and cooled in a condensation tank by the cold air generated at the other end of the vortex tube to condense fresh water.

[0007] 2. The technical solution adopted by the present invention is as follows: a portable water production device based on vortex tube hot and cold drive, including a compressed air passage, a high-temperature evaporation passage and a low-temperature condensation passage, the compressed air passage includes an air compressor and a vortex tube, the exhaust port of the air compressor is connected to the filter, the bottom coil of the seawater tank, the heat exchanger, the first valve and the vortex tube in sequence through a pipeline, the high-temperature evaporation passage includes a hot air outlet of the vortex tube, and is connected to the inlet of the second valve through a pipeline, the outlet of the second valve is connected to the inlet of the middle layer pipeline of the seawater tank through a pipeline, the hot air passes through the pipeline through the second valve into the middle layer of the seawater tank, and the raw seawater is discharged from the middle layer of the seawater tank. The funnel enters the lower layer of the seawater tank through the pipeline, and the seawater is pumped from the lower layer of the seawater tank to the upper layer of the seawater tank through the pipeline connection and the water pump, and then enters the middle layer and the lower layer in turn through the mesh bottom surface of the upper layer to form a cycle, and the concentrated brine in the lower layer of the seawater tank is discharged through the pipeline through the sixth valve; the low-temperature condensation passage includes the cold air outlet of the vortex tube, and is connected to the inlet of the third valve through the pipeline, the outlet of the third valve is connected to the multi-layer coil inside the condensation box through the pipeline and discharged through the exhaust head, the hot and humid air flows into the middle layer of the seawater tank The outlet of the pipeline enters the condensation box body through the pipeline and is discharged to the atmosphere, and the produced fresh water is discharged from the bottom of the condensation box through the fifth valve.

[0008] In a preferred solution, the working medium flowing in the compressed air passage is high-pressure air, which is passed into the bottom coil of the seawater tank in order to recover the waste heat of the compressed air.

[0009] In the preferred solution, the seawater tank is divided into three layers: upper, middle and lower. The funnel is connected to the lower layer through a pipeline, the second valve is connected to the middle layer through a pipeline, the water pump is connected to the bottom of the lower layer and the top of the upper layer through a pipeline, and the sixth valve is connected to the bottom of the lower layer through a pipeline.

[0010] In a preferred solution, the working medium entering the middle layer of the seawater tank in the high-temperature evaporation passage is hot air, and the working medium flowing out of the middle layer of the seawater tank is hot and humid air.

[0011] In a preferred solution, the working medium pumped from the lower layer of the seawater tank to the upper layer of the seawater tank in the high-temperature evaporation passage is circulating seawater, and the working medium discharged from the lower layer of the seawater tank is concentrated brine.

[0012] In a preferred solution, the condensation box includes a multi-layer coil and a vacuum interlayer outer wall, and the cold air is isolated from the hot and humid air through the multi-layer coil and does not mix with each other.

[0013] In a preferred solution, the working medium entering the condenser box body in the low-temperature condensation passage is hot and humid air, and the working medium entering the multi-layer coil of the condenser box is cold air.

[0014] In a preferred solution, the working fluid flowing out from the condensation tank in the low-temperature condensation passage is fresh water, and the parameter settings of the exhaust head are adjusted according to actual conditions.

[0015] In the preferred scheme, n groups of vortex tubes can be arranged in parallel, a first sub-valve is provided on the compressed air passage at the inlet of each vortex tube, a second sub-valve is provided on the high-temperature evaporation passage at the outlet of each vortex tube, the outlet of the second sub-valve is connected to the seawater tank through a pipeline, and a third sub-valve is provided on the low-temperature condensation passage at the outlet of each vortex tube, and the outlet of the third sub-valve is connected to the condensation tank through a pipeline.

[0016] In a preferred solution, the outer surfaces of the vortex tube, condensation box, seawater box and all pipelines are covered with insulation materials, the condensation box includes a vacuum interlayer outer wall, and all pipelines are well connected and have good air tightness.

[0017] The portable water production device based on the cold and hot drive of the vortex tube provided by the present invention has the following effects:

[0018] 1. Providing efficient fresh water production solutions: Using the principle of vortex tubes to separate hot and cold fluids, the energy of compressed air is efficiently converted into heat and cold energy, which are used for seawater evaporation and hot and humid air condensation respectively. This efficient energy conversion process improves the efficiency of fresh water production, especially in the two key links of seawater evaporation and hot and humid air condensation, and improves the water resource recovery rate.

[0019] 2. Reduce energy consumption and operating costs: The vortex tube has no moving parts, which reduces the mechanical loss and failure rate of the equipment, and reduces maintenance requirements and costs. At the same time, compressed air as a power source does not require complex pretreatment and filtration systems, further reducing operating costs.

[0020] 3. Adapt to a wide range of application scenarios: The modular design and easy operation of the present invention enable it to be flexibly applied in projects of different scales to meet the needs of various users such as households, industries, and agriculture. Especially in remote areas, it can provide a stable supply of fresh water, improve the quality of life of local residents, and promote local economic and social development. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a structural schematic diagram of the seawater tank of the present invention;

[0024] Figure 3 It is a structural schematic diagram of the condensation box of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of a multi-layer coil;

[0026] Figure 5This is a schematic diagram of multiple groups of vortex tubes connected in parallel:

[0027] In the figure: air compressor 1, filter 2, heat exchanger 3, first valve 4, vortex tube 5, water pump 6, third valve 7, condensing box 8, seawater box 9, exhaust head 10, funnel 11, fifth valve 12, sixth valve 13, second valve 14, seawater box upper layer 9-1, seawater box middle layer 9-2, seawater box lower layer 9-3, serpentine coil 9-4, multi-layer coil 8-1, vacuum interlayer outer wall 8-2. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0029] Combination Figure 1 to Figure 5 The specific embodiments of the present invention are described in further detail.

[0030] Embodiment 1:

[0031] In view of the problems in the prior art, the system energy efficiency of seawater desalination technology and devices is low, the energy consumption is high, the device operation scale is large, resulting in a relatively single application scenario, and the greenhouse gas emissions are relatively serious, which may aggravate the greenhouse effect. The present invention provides a portable water production device based on vortex tube cold and hot drive, including a compressed air passage, a high-temperature evaporation passage and a low-temperature condensation passage, such as Figure 1 shown.

[0032] The compressed air passage includes an air compressor and a vortex tube. The air compressor 1 is connected to the filter 2, the serpentine coil 9-4 at the bottom of the seawater tank 9, the heat exchanger 3, the first valve 4 and the vortex tube 5 in sequence through pipelines. The high-temperature evaporation passage includes a vortex tube 5. The hot air outlet of the vortex tube 5 is provided with a second valve 14. The outlet of the second valve 14 is connected to the middle layer 9-2 of the seawater tank 9 through a pipeline. The hot air enters the middle layer 9-2 of the seawater tank 9 through the pipeline through the second valve 14. The raw seawater enters the lower layer 9-3 of the seawater tank 9 through the funnel 11 through the pipeline. The water pump 6 connects the circulating water inlet of the lower layer 9-3 and the upper layer 9-1 of the seawater tank 9 through a pipeline. The circulating seawater is extracted from the lower layer of the seawater tank 9 through a pipeline connection and the water pump 6 to the upper layer 9-1 of the seawater tank 9. The outlet of the sixth valve 13 is connected to the water outlet of the lower layer 9-3 of the seawater tank 9 through a pipeline.

[0033] Preferably, the hot gas inlet of the seawater tank 9 is provided with a second valve 14, the raw seawater inlet of the seawater tank 9 is provided with a funnel 11, and the concentrated brine outlet of the seawater tank 9 is provided with a sixth valve 13. By controlling the opening and closing of the second valve 14 and the funnel 11 according to actual conditions, the working state of the seawater tank 9 can be controlled.

[0034] The low-temperature condensation passage includes a cold air outlet of the vortex tube 5, and is connected to the inlet of the third valve 7 through a pipeline. The outlet of the third valve 7 is connected to the multi-layer coil 8-1 inside the condenser box 8 through a pipeline and is discharged through the exhaust header 10. Hot and humid air flows in from the middle-layer pipeline outlet of the seawater tank 9, enters the condenser box 8 through the pipeline and is discharged to the atmosphere. The produced fresh water is discharged from the bottom of the condenser box through the fifth valve 12.

[0035] Preferably, the condenser 8 includes a multi-layer coil 8-1 and a vacuum interlayer outer wall 8-2, and the working condition of the condenser 8 can be controlled by controlling the opening and closing of the third valve 7. The exhaust pressure parameter setting of the exhaust head 10 is adjusted according to the actual situation, so as to control the water production per unit time of the condenser 8.

[0036] Preferably, the outer surfaces of the vortex tube 5, the condensation tank 8, the seawater tank 9 and all pipelines are covered with thermal insulation materials, and all pipelines are well connected and have good air tightness.

[0037] Embodiment 2:

[0038] Different from Example 1, Figure 2 As shown, the seawater tank 9 includes an upper layer 9-1, a middle layer 9-2 and a lower layer 9-3, and the bottom of the upper layer 9-1 is a mesh surface. During the high-temperature evaporation process, the hot air from the hot air outlet of the vortex tube 5 enters the middle layer 9-2 of the seawater tank through the second valve 14, and the raw seawater flows into the lower layer 9-3 of the seawater tank through the funnel 11. The water pump 6 connects the circulating water inlet of the lower layer 9-3 of the seawater tank and the upper layer 9-1, and extracts the circulating seawater from the lower layer 9-3 of the seawater tank to the upper layer 9-1 of the seawater tank, and enters the middle layer 9-2 through its mesh bottom surface to be heated and evaporated to form hot and humid air. The remaining seawater flows to the lower layer 9-3 of the seawater tank to start the next cycle. After a period of circulation, the concentrated brine flows out from the bottom of the lower layer 9-3 of the seawater tank through the sixth valve 13.

[0039] Embodiment 3:

[0040] Different from Example 1, Figures 3-4 As shown, the condensation box 8 includes a vacuum interlayer outer wall 8-1 and a multi-layer coil 8-2. The thin tube wall of the multi-layer coil 8-1 facilitates heat exchange between hot and humid air and cold air. The vacuum interlayer outer wall 8-2 is a double-layer rectangular structure, and the interlayer is vacuumed to enhance the thermal insulation performance.

[0041] During the low-temperature condensation process, the low-temperature normal-pressure air coming out of the cold air outlet of the vortex tube 5 enters the condensation box 8 through the third valve 7. The cold air fills the multi-layer coil 8-1 of the condensation box, and is then connected to the outside atmosphere through the exhaust head 10, absorbing a large amount of heat from the hot and humid air from the seawater tank 9. The water vapor in the hot and humid air entering the seawater tank 9 condenses on the surface of the coil when it is cold to form dew droplets, which drip to the bottom of the condensation box 8 after a period of time. The cooled hot air is discharged from the bottom of the condensation box 8 to the atmosphere, and the water outlet at the bottom of the condensation box 8 flows out through the fifth valve 12.

[0042] Embodiment 4:

[0043] Different from Example 1, Figure 5 As shown, the vortex tube 5 can be arranged in n groups of vortex tubes in parallel, and a first sub-valve 4-n is provided on the compressed air passage at the inlet of each vortex tube 5, and a second sub-valve 14-n is provided on the high-temperature evaporation passage at the outlet of each vortex tube 5, and the outlet of the second sub-valve 14-n is connected to the seawater tank 9 through a pipeline, and a third sub-valve 7-n is provided on the low-temperature condensation passage at the outlet of each vortex tube 5, and the outlet of the third sub-valve 7-n is connected to the condensation tank 8 through a pipeline.

[0044] The above-mentioned embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here, that is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A portable water production device based on vortex tube hot and cold drive, characterized in that: It includes a compressed air passage, a high-temperature evaporation passage, and a low-temperature condensation passage. The compressed air passage includes an air compressor (1) and a vortex tube (5). The air compressor (1) is connected to a filter (2), a seawater tank (9), a heat exchanger (3), a first valve (4), and a vortex tube (5) in sequence through pipelines. The evaporation passage includes hot air at the outlet of the vortex tube (5) entering the seawater tank (9) through a pipeline via a second valve (14), seawater entering the seawater tank (9) through a funnel (11) through a pipeline, a water pump (6) connected to the upper and lower circulating water outlets of the seawater tank (9) through a pipeline, and seawater is pumped from the bottom of the seawater tank (9) to the top of the seawater tank (9) through the water pump (6), and then sprayed into the hot air to form The hot and humid air, the concentrated brine outlet of the seawater tank (9) is connected to the inlet of the sixth valve (13), so that the concentrated brine is discharged; the condensation passage includes the cold air at the outlet of the vortex tube (5) connected to the multi-layer coil of the condensation box (8) through the third valve (7), the hot and humid air coming out of the seawater tank (9) enters the box body of the condensation box (8) through the pipeline, the hot and humid air is cooled by the cold air and condenses into fresh water, the cold air after heat exchange is discharged from the exhaust head (10), the hot and humid air after cooling is discharged from the bottom of the condensation box (8) to the outside atmosphere, and the water outlet at the bottom of the condensation box (8) is connected to the inlet of the fifth valve (12), so as to produce fresh water.

2. A portable water production device based on vortex tube hot and cold drive according to claim 1, characterized in that: The seawater tank (9) in the high-temperature evaporation passage is divided into three layers: upper, middle and lower. The funnel (11) is connected to the lower layer (9-3) through a pipeline, the second valve (14) is connected to the middle layer (9-2) through a pipeline, the water pump (6) is connected to the bottom of the lower layer (9-3) and the top of the upper layer (9-1) through a pipeline, and the sixth valve (13) is connected to the bottom of the lower layer (9-3) through a pipeline.

3. A portable water production device based on vortex tube hot and cold drive according to claims 1-2, characterized in that: In the high-temperature evaporation passage, the working medium entering the middle layer of the seawater tank (9) is hot air, the working medium entering the condensation tank (8) is hot and humid air, the working medium flowing out from the lower layer of the seawater tank (9) and pumped by the water pump (6) to the upper layer of the seawater tank (9) is circulating seawater, and the working medium discharged from the lower layer of the seawater tank (9) is concentrated brine.

4. A portable water production device based on vortex tube hot and cold drive according to claims 1 to 3, characterized in that: The condensation box (8) comprises a multi-layer coil (8-1) and a vacuum interlayer outer wall (8-2). Cold air is isolated from hot and humid air through the multi-layer coil (8-1) and does not mix with each other.

5. A portable water production device based on vortex tube hot and cold drive according to claims 1 to 4, characterized in that: The working medium entering the condenser box (8) in the low-temperature condensation passage is hot and humid air, the working medium entering the multi-layer coil in the condenser box (8) is cold air, and the working medium flowing out from the bottom of the condenser box (8) is fresh water. The parameter setting of the exhaust head (10) is adjusted according to actual conditions.

6. A portable water production device based on vortex tube hot and cold drive according to claim 1, characterized in that: The vortex tubes (5) can be arranged in parallel to form n groups of vortex tubes, each vortex tube (5) having a first sub-valve (4-n) on the compressed air passage at the inlet, each vortex tube (5) having a second sub-valve (14-n) on the high-temperature evaporation passage at the outlet of each vortex tube (5), the outlet of the second sub-valve (14-n) being connected to a seawater tank (9) via a pipeline, and each vortex tube (5) having a third sub-valve (7-n) on the low-temperature condensation passage at the outlet of the third sub-valve (7-n), the outlet of the third sub-valve (7-n) being connected to a condensation tank (8) via a pipeline.

7. A portable water production device based on vortex tube hot and cold drive according to claims 1 to 6, characterized in that: The outer surfaces of the vortex tube (5), condensation tank (8), seawater tank (9) and all pipelines are covered with thermal insulation materials, and all pipelines are well connected and have good air tightness.

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