Miniaturized deuterium-depleted water preparation device with inherent safety attribute

Abstract

The utility model discloses a miniaturized deuterium-depleted water preparation device with an inherent safety attribute, which comprises a water purification unit, a separation column, a thermal insulation column box, a switching valve, a condenser, a water storage tank and a control unit which are integrated in a miniaturized box body, the separation column is filled with separation filler, the heat preservation column box is used for containing the separation column, the input end of the switching valve is connected with the separation column, one output end of the switching valve is connected with the condenser, the condenser is used for condensing water vapor from the switching valve into liquid water and outputting the liquid water to the water storage tank, and the water storage tank is provided with a first water outlet end. The deuterium-depleted water is prepared on the basis of the difference of the adsorption-desorption property or the dynamic diffusion property of the hydrogen isotope oxide in the porous material, hydrogen operation is not involved, and the deuterium-depleted water preparation device has the intrinsic safety property, is low in water preparation energy consumption, few in used parts, small in size, capable of remarkably reducing the equipment size and high in equipment integration degree.

Description

Technical Field

[0001] The utility model relates to deuterium-depleted water preparation equipment, and in particular to a miniaturized deuterium-depleted water preparation device with inherent safety properties. Background Art

[0002] Protium, deuterium and tritium are three isotopes of hydrogen. Tritium is a radioactive nuclide with extremely low natural abundance. The natural environment is mainly composed of protium and deuterium. The natural abundance of deuterium is about 150ppm (i.e., the atomic ratio D / (H+D) = 150 / 10 6 Water with a D concentration below 130 ppm is generally called deuterium-depleted water.

[0003] A large number of existing methods and technologies for preparing deuterium-depleted water are all factory-level large-scale production devices, which are not suitable for small-scale utilization, such as the water-hydrogen dual-temperature exchange method and the water distillation method. However, for the audience of deuterium-depleted water, miniaturized deuterium-depleted water preparation equipment that can be easily installed in places such as homes, offices and hospitals has the advantages of being close to end users, improving user experience, and reducing water costs. It has been a key research and development direction in the field of deuterium-depleted water preparation in recent years. However, there are very few related technologies and patents for miniaturized solutions and equipment reported so far, and some of the principles are not sound, and the functions cannot be realized at all, and there is a lack of substantive content. Therefore, the implementation technology of miniaturized deuterium-depleted water preparation equipment for home / small-scale commercial use is still relatively vacant as a whole.

[0004] The existing deuterium-depleted water preparation technology mainly includes the following directions:

[0005] Water-based electrolysis technology can produce deuterium-depleted water. During the electrolysis process, due to the different migration rates of protium and deuterium in the electrolyte, the hydrogen released from the cathode contains more protium and less deuterium, resulting in deuterium-depleted hydrogen. The deuterium in the water of the electrolytic cell is concentrated to form deuterium-rich water; the deuterium-depleted hydrogen is then recombined with hydrogen and oxygen to form deuterium-depleted water. Chinese patent application number 201910566901.X discloses a "Process system for preparing deuterium-depleted water and a method for preparing deuterium-depleted water using the same." It describes the process principle for preparing deuterium-depleted water based on electrolysis, but it is limited to the use of Pt-P alloy catalysts. In fact, all commercial catalysts can achieve the goal of producing deuterium-depleted hydrogen, such as commercial Pt / C, and it does not address the requirements of miniaturized applications. Chinese patent application number 201420748090.8 describes a "multifunctional negative hydrogen low-deuterium oxidation water generator." It utilizes the principle of electrolysis to address the need for miniaturization, but the underlying principle is unsound. According to the principle of electrolytic separation of hydrogen isotopes (Jiang Guoqiang, Luo Deli, Lu Guangda, and Sun Lingxia. Tritium and Tritium Engineering Technology [M]. Beijing: National Defense Industry Press, 2007), electrolysis cannot directly produce deuterium-depleted water. The cathode of electrolysis produces deuterium-depleted hydrogen, and the resulting material balance inevitably results in deuterium-enriched liquid water. To produce deuterium-depleted water, the hydrogen must be oxidized, requiring the addition of an additional module. This method only produces hydrogen-rich water (water saturated with dissolved hydrogen), while the deuterium concentration is elevated compared to the raw water, resulting in deuterium-enriched water. Chinese patent document No. 201711288946.2 discloses a "system for preparing deuterium-depleted water by a combined electrolysis-catalytic exchange process and its implementation method." This method adds a catalytic exchange reaction process to electrolysis. However, due to the need for a very tall catalytic exchange column, this method is only suitable for large-scale production of deuterium-depleted hydrogen / deuterium-depleted water by electrolysis, and cannot be applied in a miniaturized manner.

[0006] The production of deuterium-depleted water can be achieved based on the principle of distillation. The vapor pressures of different hydrogen isotope oxides vary. The heavy hydrogen element deuterium tends to be enriched at the bottom of the distillation column, while the hydrogen element is enriched at the top of the column, thereby obtaining deuterium-depleted water at the top. Chinese patent document No. 201710341585.7 discloses “a distillation process system for preparing deuterium-depleted water of various concentrations and its implementation method”. It proposes a technical route for large-scale industrial deuterium-depleted water production based on the principle of distillation. It can produce deuterium-depleted water of different concentrations. The scale effect can reduce the unit water production cost, but the extremely high (such as >20m) distillation column and complex supporting system limit the application of miniaturized water production equipment, and targeted scheme design must be carried out. Chinese patent document No. 202010257597.3 discloses “an integrated miniaturized deuterium-depleted water dispenser”, which records a small deuterium-depleted water dispenser based on the principle of distillation. This method is feasible for small-scale application in the preparation of deuterium-depleted water. The internal medium is water and water vapor, which is inherently safe. However, due to the need for vertically tall packing columns, the actual equipment is relatively high (often requiring an installation space of more than 2m), and a large amount of vacuum control, flow control, and reflux control are involved internally, making the actual process and equipment relatively complex.

[0007] By exploiting the differences in adsorption and desorption properties and molecular dynamics of different hydrogen isotopes in porous media, hydrogen isotope separation and the production of deuterium-depleted water can be achieved. Chinese Patent Application No. 201710081691.6 discloses a "displacement chromatography hydrogen isotope separation device." Based on this separation method, it uses molecular sieves and other separation materials to achieve separation at a low temperature of 77K in liquid nitrogen to separate protium and deuterium in hydrogen gas. Chinese Patent Application No. 201710081978.9 discloses a "low-temperature palladium displacement separation method." Based on the same principle, it uses a noble metal Pd-based material to achieve hydrogen isotope displacement separation at liquid nitrogen temperatures. While both methods are based on chromatographic separation, they both separate reduced H2 and HD. This involves the separation of cryogenic liquid nitrogen at 77K and the need for either room-temperature rewarming with a drive gas or room-temperature gas purge replacement, resulting in unfavorable energy consumption. The need for liquid nitrogen refills or bulky cryogenic refrigeration equipment makes this method difficult to miniaturize. In addition, the direct separation process of hydrogen involves a large amount of hydrogen operations and the preparation of deuterium-depleted water by hydrogen and hydrogen-oxygen recombination, which poses significant hydrogen safety issues. If water vapor can be directly separated, the process will have inherent safety characteristics, which is crucial for miniaturized equipment in places such as homes and offices.

[0008] Based on the kinetic differences of hydrogen isotope oxides in porous media, the preparation of deuterium-depleted water under room temperature and high temperature conditions (100-150°C) can be achieved. The Chinese patent document with application number 201811216421.2 discloses "a system and method for separating natural water to prepare deuterium-depleted water and deuterium-enriched water". Based on the principle of chromatography, a simulated moving bed is designed. The moving bed is filled with separation materials. Through the sequential heating / cooling of the separation column and the control of the one-way valve, the water vapor forms a closed loop in the separation column and circulates. As the number of cycles increases, a significant deuterium concentration gradient is generated, and finally deuterium-depleted water can be extracted at the far end of the heating loop. The filler used in this method is cheap and does not require precious metal loading materials. It can achieve smaller-scale separation, but the control process is complicated, which is not conducive to miniaturized control. The Chinese patent document with application number 202210607220.5 discloses "A hydrogen isotope water separation system and method", which records a hydrogen isotope water separation system and method, which is composed of an adsorption bed, storage tanks for hydrogen isotope oxides with different concentrations, a transfer pump, etc., and based on the difference in hydrogen isotope oxide water vapor, realizes the adsorption-desorption principle on an engineering scale to prepare deuterium-depleted water. However, this process is relatively complicated, involving various types of tanks and heating and cooling equipment used on a large scale in engineering projects. The system is large and not suitable for miniaturized equipment solutions. The Chinese patent document with application number 201610910087.5 discloses "A method for producing deuterium-depleted water", which proposes a direct separation method for water, using activated alumina loaded with nano-platinum as an adsorbent to achieve the production of deuterium-depleted water in an adsorber with a length of 100m or even 10km. Although this method proposes a direct chromatographic separation method for water vapor, it has the following problems: (1) the precious metal Pt loading material is expensive; (2) the separator is extremely long, the manufacturing cost and material cost are extremely high, and the miniaturization goal cannot be achieved; (3) frequent heating and cooling are required to achieve production, the energy consumption is high and the production efficiency is significantly affected. Utility Model Content

[0009] In response to the problems existing in the prior art, the utility model provides a miniaturized deuterium-depleted water preparation device with inherent safety properties. Deuterium-depleted water is prepared based on the differences in the adsorption-desorption properties or kinetic diffusion properties of hydrogen isotope oxides in porous materials. It does not involve hydrogen operations and has inherent safety properties. There is no electrolysis and repeated evaporation and condensation process, the water production energy consumption is low, and the device uses fewer components, which can significantly reduce the equipment size and improve the equipment integration.

[0010] In order to achieve the above purpose, the technical solution adopted by the present utility model is as follows:

[0011] A miniaturized deuterium-depleted water preparation device with inherent safety properties includes a water purification unit, a separation column, an insulated column box, a switching valve, a condenser, a water storage tank and a control unit integrated in a miniaturized box. The water purification unit is used to purify the input raw water and input it into the separation column. The separation column is filled with separation fillers based on different adsorption-desorption properties or molecular dynamics diffusion performance. The insulated column box is used to place the separation column and provide a corresponding temperature according to the state of the separation column. The input end of the switching valve is connected to the separation column, one output end is connected to the condenser, and the other output end is connected to the second water outlet end. The condenser is used to condense water vapor from the switching valve into liquid water and output it to the water storage tank. The water storage tank is provided with a first water outlet end for supplying water to users. The control unit is used to control the operation of each component according to preset parameters.

[0012] Specifically, the separation filler includes a modified or untreated A-type, Y-type, Z-type or ZSM-type molecular sieve filler, resin filler or activated carbon filler having separation performance for hydrogen isotope oxides.

[0013] Specifically, the separation column is a spiral tube separation column, the inlet end of which is connected to the water purification unit, and the outlet end of which is connected to the switching valve.

[0014] Specifically, the insulating column box includes a column box body, a placement cavity configured on the column box body for covering the separation column, an insulating layer covering the outer surface of the column box body, and a heating element and a temperature sensing element arranged in the column box body and electrically connected to the control unit.

[0015] Specifically, the condenser includes a heat exchange pipe with an input end connected to a switching valve and an output end connected to a water storage tank, and a heat exchange and heat dissipation element arranged on the heat exchange pipe, wherein the heat exchange and heat dissipation element is electrically connected to the control unit when an electronic control element is used.

[0016] Specifically, the control unit controls the temperature of the insulation column box according to preset parameters to maintain a stable separation temperature of the separation column and controls the switching valve to connect the separation column with the condenser in the water production mode, and controls the switching valve according to preset parameters to connect the separation column with the second water outlet in the drainage mode.

[0017] Specifically, a fan for forced ventilation is provided in the miniaturized box.

[0018] Furthermore, the miniaturized deuterium-depleted water preparation device with inherent safety properties also includes an air pump electrically connected to the control unit, and the air pump is used to generate pressurized air and output it to the separation column through the purge port configured on the separation column to regenerate the separation filler; the switching valve is configured as a four-way valve, and its third output end is configured as an exhaust port for discharging the purge gas.

[0019] Specifically, the control unit controls the temperature of the heat preservation column box according to preset parameters in the regeneration mode to maintain a stable filler regeneration temperature of the separation column and controls the switching valve to connect the separation column with the exhaust port.

[0020] Specifically, the first water outlet produces deuterium-depleted water with a deuterium concentration of 50-120 ppm.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) Based on the molecular dynamics differences of different hydrogen isotope oxide vapors and the principle of chromatographic separation, the present invention uses a separation column and separation filler to make the water vapor of H2O and HDO form different movement speeds, thereby collecting and producing deuterium-depleted water in the front section through a switching valve and a condenser, while the deuterium-rich water vapor in the back section can be controlled and discharged through a switching valve, thereby realizing miniaturized deuterium-depleted water preparation, meeting the needs of miniaturized deuterium-depleted water preparation in homes, offices, hospitals, etc. The entire process involves fewer and smaller device components, is simpler and more simplified than conventional distillation processes, and does not involve hydrogen operation, and has inherent safety properties. The present invention is ingeniously designed, easy to use, and has low operating costs, and is suitable for application in miniaturized deuterium-depleted water preparation equipment.

[0023] (2) The process of preparing deuterium-depleted water in the present invention only involves the separation of water, and no hydrogen is involved in the whole process. Compared with the electrolysis and catalytic principles, the risk of hydrogen explosion can be avoided and it is inherently safe. Compared with the miniaturized equipment of the distillation process, fewer components are used and the component size is small, which can effectively reduce the overall size of the equipment. At the same time, compared with the distillation and electrolysis technology, there is no electrolysis process and repeated evaporation and condensation process, the energy consumption of water production is less, which can effectively reduce the energy consumption cost of water production.

[0024] (3) The separation column of the present invention has many optional items of separation fillers, and can provide matching service solutions based on the user's actual application needs, such as separation efficiency, yield and integration. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0026] Figure 2 This is a schematic structural diagram of the heat preservation column box part in the embodiment of the present invention.

[0027] Figure 3 This is a deuterium concentration penetration curve of the separation column in the embodiment of the present invention. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to the accompanying drawings and examples. The implementation methods of the present invention include but are not limited to the following examples.

[0029] Example

[0030] like Figures 1 to 2 As shown, the miniaturized deuterium-depleted water preparation device with inherent safety properties includes a water purification unit 2, a separation column 3, an insulation column box 4, a switching valve 5, a condenser 6, a water storage tank 7, an air pump 8, a fan 9 and a control unit 10 integrated in a miniaturized box 1, and each component is connected by a pipeline and valve system.

[0031] The water purification unit is connected to the raw water input device and is used to purify the input raw water and input it into the separation column to remove impurities in the raw water, ensuring the long life, safe and stable operation of the separation column. The raw water can be tap water, and the water purification unit can use a conventional water purifier, such as a reverse osmosis water purifier. The water purification unit is equipped with a wastewater discharge outlet.

[0032] The separation column is filled with separation fillers based on different adsorption-desorption properties or molecular dynamic diffusion properties. The separation principle of the separation column is to utilize the quantum sieving effect that occurs when the difference between the pore size d of the porous separation filler and the gas molecule size σ is close to the de Broglie wavelength of the gas molecule. Due to the difference in molecular size and weight between H2O and HDO, the de Broglie wavelength of the heavier HDO molecule is smaller, while the wavelength of the H2O molecule is longer, resulting in a difference in kinetic radius. After entering the separation column, the H2O molecule moves faster and can quickly penetrate the separation column, while the HDO molecule enters the pores of the separation material, resulting in a longer time to pass through the separation column, forming a hysteresis, thereby achieving the separation of H2O and HDO. Deuterium-depleted water vapor is generated in the initial section of the flowthrough, which can be further collected by a condenser; deuterium-enriched water vapor is generated at the tail end and can be directly discharged in the subsequent process. Preferably, the separation column adopts a spiral tube separation column, which can significantly reduce the size of the equipment. Its inlet end is connected to a water purification unit, the outlet end is connected to a switching valve, and a purge port is also configured to connect to an air pump.

[0033] The separation filler includes a modified or untreated A-type, Y-type, Z-type or ZSM-type molecular sieve filler, resin filler or activated carbon filler having separation performance for hydrogen isotope oxides. Specifically, activated carbon, carbon molecular sieve, activated alumina, A / Y / Z / ZSM-type molecular sieves, new MOFs and COFs and other materials, as well as surface-modified related materials (such as molecular sieves modified with precious metal Pt) can be selected according to actual application needs.

[0034] The insulating column box is used to place the separation column and provide a corresponding temperature according to the state of the separation column. The separation column includes a separation state and a regeneration state. The specific insulating column box includes a column box body 11, a placement cavity 12 configured on the column box body for covering the separation column, an insulating layer 13 covering the outer surface of the column box body, and a heating element 14 and a temperature sensing element arranged in the column box body and electrically connected to the control unit. The placement cavity is generally trough-shaped, and the specific shape and size are matched according to the shape and size of the separation column; the insulating layer prevents heat from leaking out and can act on the separation column more accurately; the heating element can use an electric heating wire to facilitate temperature control and realization; the temperature sensing element can use a thermocouple to detect the temperature of the insulating column box in real time for convenient feedback adjustment. Preferably, the separation temperature provided by the insulating column box is 105-120°C, and the purified water input into the separation column can be converted into water vapor in the separation state.

[0035] The switching valve is preferably a four-way valve, configured with one input end and three output ends, and the switching of the three output ends can be controlled by a control unit. The input end is connected to the separation column to receive the water vapor outputted by the separation column, and the first output end is connected to the condenser to output the deuterium-depleted water vapor in the initial outflow section of the separation column to the condenser for condensation, so as to realize the collection of deuterium-depleted water. The second output end is connected to the second water outlet end, which is used to output the deuterium-rich water vapor at the tail end of the separation column after switching. The second water outlet end can be connected to the waste liquid discharge system or the deuterium-rich water can be collected by the storage tank; the wastewater outlet of the water purification unit can also be connected to the second water outlet end. The third output end is connected to the exhaust port for discharging the purge gas after switching.

[0036] The condenser is used to condense deuterium-depleted water vapor from the switching valve into liquid water and output it to a water storage tank. Specifically, it includes a heat exchange pipe with an input end connected to the switching valve and an output end connected to the water storage tank, and a heat exchange and heat dissipation element disposed on the heat exchange pipe. The heat exchange and heat dissipation element can be a small refrigerator or an air-cooled fin structure equipped with a cooling fan, depending on actual application requirements. If an electronic control element is used, the heat exchange and heat dissipation element is electrically connected to a control unit.

[0037] The water storage tank is used to store the generated deuterium-depleted water and is provided with a first water outlet for supplying water to users on demand. Deuterium-depleted water with a deuterium concentration of 50-120 ppm can be produced.

[0038] The input end of the air pump is connected to the air supply port to allow air to enter and pressurize the air, and the output end is connected to the purge port configured on the separation column. In the separation column regeneration mode, the air pump pressurizes the air and then purges the separation column to drive out the water vapor adsorbed by the separation filler in the separation column, regenerate the separation filler, and restore the separation column to optimal separation performance.

[0039] The fan is arranged in the miniaturized box and is used for forced ventilation inside the equipment to assist in condensing the deuterium-depleted water vapor and maintain a stable temperature in the column box.

[0040] The control unit is used to control the operation of each component according to preset parameters. The preset parameters include water production mode, drainage mode and regeneration mode. Among them, in the water production mode, the temperature of the insulation column box is controlled to maintain the separation column with a stable separation temperature and the switching valve is controlled to connect the separation column with the condenser. The condenser is operated to condense the deuterium-depleted water vapor into deuterium-depleted water and store it in the water storage tank; in the drainage mode, the switching valve is controlled to connect the separation column with the second water outlet end, and the deuterium-rich water vapor at the rear end of the separation column is discharged from the second water outlet end; in the regeneration mode, the temperature of the insulation column box is controlled to maintain the separation column with a stable filler regeneration temperature and the switching valve is controlled to connect the separation column with the exhaust port. The air pump outputs pressurized air to purge the separation column, and the purge gas is discharged from the exhaust port.

[0041] According to the above description, corresponding pipes and valves are configured between the various components to achieve the circulation of gas and liquid. Corresponding sensors can also be configured to detect parameters such as gas and liquid flow, flow rate, temperature, etc. to achieve automated control.

[0042] In terms of equipment miniaturization, since the number of components is less than that of other process components, the components are smaller in size and more integrated, a more compact equipment size can be achieved to meet the needs of miniaturized deuterium-depleted water preparation in homes, offices, hospitals, etc.

[0043] Taking this miniaturized device with a water production capacity of 1kg / h as an example, the reference dimensions are 400mm × 300mm × 800mm. Equipped with high-efficiency separation packing, the filling volume is 1kg. The spiral tube separation column can use DN8mm × 15m stainless steel bellows, which are then processed into spiral tubes with reference dimensions of Φ120mm × 500mm. The spiral tubes are placed in an insulated column box, and electric heating rods can be placed inside the spiral tubes to ensure thermal efficiency and save space. The rational layout of components such as the water purification unit, switching valve, condenser, water storage tank, air pump, fan, and control unit ensures that the overall dimensions of the equipment are controlled within the above dimensions. Furthermore, the modular design and casters of the entire equipment make it easy to disassemble, assemble, and move. Moreover, according to actual application requirements, this miniaturized equipment can also be configured with a variety of different models and specifications such as 2kg / h, 3kg / h, and 4kg / h water production capacities, and each component can be adjusted accordingly. For example, the 2kg / h water production capacity can be configured with a spiral tube with a specification of DN12mm×16m, the 3kg / h water production capacity can be configured with a spiral tube with a specification of DN14mm×18m, and the 4kg / h water production capacity can be configured with a spiral tube with a specification of DN16mm×20m, etc.; since the changes in the diameter and length of the separation column have little effect on the overall volume of the spiral tube after the coiling, the overall size of the equipment can also be controlled within the scope of miniaturization, which can meet the needs of miniaturized deuterium-depleted water preparation in homes, offices, hospitals, etc.

[0044] like Figure 3 The curve showing the change of deuterium concentration in the penetrating water with time is shown. The deuterium concentration of the first 75% of the effluent is less than 100 ppm, and the first 85% is less than 120 ppm. It can be seen that the miniaturized equipment has a high efficiency separation capability.

[0045] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any changes based on the design principles of the present invention and any changes made through non-creative work on this basis shall fall within the scope of protection of the present invention.

Claims

1. A miniaturized deuterium-depleted water preparation device with inherent safety properties, characterized in that: It includes a water purification unit, a separation column, an insulated column box, a switching valve, a condenser, a water storage tank and a control unit integrated in a miniaturized box. The water purification unit is used to purify the input raw water and input it into the separation column. The separation column is filled with separation fillers based on different adsorption-desorption properties or molecular dynamics diffusion properties. The insulated column box is used to place the separation column and provide corresponding temperature according to the state of the separation column. The input end of the switching valve is connected to the separation column, one output end is connected to the condenser, and the other output end is connected to the second water outlet end. The condenser is used to condense water vapor from the switching valve into liquid water and output it to the water storage tank. The water storage tank is provided with a first water outlet end for supplying water to users. The control unit is used to control the operation of each component according to preset parameters.

2. The miniaturized deuterium-depleted water preparation device with inherent safety properties according to claim 1 is characterized in that: The separation filler includes an A-type, Y-type, Z-type or ZSM-type molecular sieve filler, a resin filler or an activated carbon filler having separation performance for hydrogen isotope oxides.

3. The miniaturized deuterium-depleted water preparation device with inherent safety properties according to claim 1 is characterized in that: The separation column is a spiral tube separation column, the inlet end of which is connected to the water purification unit, and the outlet end is connected to the switching valve.

4. The miniaturized deuterium-depleted water preparation device with inherent safety properties according to claim 1 is characterized in that: The thermal insulation column box includes a column box body, a placement cavity configured on the column box body for covering the separation column, a thermal insulation layer covering the outer surface of the column box body, and a heating element and a temperature sensing element arranged in the column box body and electrically connected to the control unit.

5. The miniaturized deuterium-depleted water preparation device with inherent safety properties according to claim 1 is characterized in that: The condenser includes a heat exchange pipe with an input end connected to a switching valve and an output end connected to a water storage tank, and a heat exchange and heat dissipation element arranged on the heat exchange pipe, wherein the heat exchange and heat dissipation element is electrically connected to the control unit when an electronic control element is used.

6. The miniaturized deuterium-depleted water preparation device with inherent safety properties according to claim 1 is characterized in that: In the water production mode, the control unit controls the temperature of the insulation column box according to preset parameters to maintain a stable separation temperature of the separation column and controls the switching valve to connect the separation column with the condenser. In the drainage mode, the control unit controls the switching valve according to preset parameters to connect the separation column with the second water outlet.

7. The miniaturized deuterium-depleted water preparation device with inherent safety properties according to claim 1 is characterized in that: A fan for forced ventilation is provided in the miniaturized box.

8. The miniaturized deuterium-depleted water production device with inherent safety properties according to any one of claims 1 to 7, characterized in that: It also includes an air pump electrically connected to the control unit, which is used to generate pressurized air and output it to the separation column through the purge port configured on the separation column to regenerate the separation filler; the switching valve is configured as a four-way valve, and its third output end is configured as an exhaust port for discharging the purge gas.

9. The miniaturized deuterium-depleted water preparation device with inherent safety properties according to claim 8, characterized in that: The control unit controls the temperature of the heat preservation column box according to preset parameters in the regeneration mode to maintain a stable filler regeneration temperature of the separation column and controls the switching valve to connect the separation column with the exhaust port.

10. The miniaturized deuterium-depleted water preparation device with inherent safety properties according to claim 8, characterized in that: The first water outlet produces deuterium-depleted water with a deuterium concentration of 50-120 ppm.

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