Industrial continuous production method and system of deuterium-depleted water

Abstract

The application discloses an industrial continuous production method and system of low-deuterium water, and the method is as follows: after pretreatment, raw water enters a tower group formed by a plurality of rectifying towers in series for separation, deuterated water is enriched in a liquid phase, and low-deuterium water is enriched in a vapor phase. The extracted high-purity low-deuterium water vapor is pressurized by a compressor and then condensed in a reboiler to release heat and drive the rectifying process, and meanwhile, part of the condensed low-deuterium water is extracted as a product, and part of the condensed low-deuterium water is returned to the rectifying tower as reflux liquid. The tower top vapor and the tower bottom liquid flow cross each other between the towers to form a closed loop or a cascade circulation. The application realizes continuous and stable production of low-deuterium water with a deuterium content reduced by 1-3 orders of magnitude by using a full heat pump rectifying method, and the low-deuterium water is easy to be popularized in industry.

Description

Technical Field

[0001] This invention relates to the field of water separation technology, and in particular to an industrial continuous production method and system for deuterium-poor water. Background Technology

[0002] Water is the source of life, and its chemical composition has a profound impact on life activities and many industrial processes. In addition to ordinary water molecules (H2O), natural water also contains a small amount of water molecules composed of the stable isotope of hydrogen, deuterium (D) (D2O, commonly known as heavy water) and its associated molecules (HDO), collectively referred to as deuterated water.

[0003] For a long time, heavy water has been valued for its important role as a neutron moderator in the nuclear industry, while the impact of trace amounts of deuterated water in ordinary water on organisms and specific chemical processes has been overlooked. In recent years, increasing scientific research has shown that trace amounts of deuterium in the environment are not harmless to organisms. Deuterated water can interfere with key life processes such as enzymatic reactions, cell division, and DNA synthesis. When the deuterium concentration in an organism is below the natural background level—that is, when drinking "low-deuterium water" or "low-deuterium water" with very low deuterated water content—it shows certain positive biological effects, such as potential in inhibiting tumor cell growth, improving immunity, and delaying aging. Furthermore, in the semiconductor industry, using low-deuterium water to clean wafers can significantly reduce device leakage current, improving product performance and yield; reducing the deuterium content in the primary loop water of nuclear power plants also helps reduce radiation decomposition products and lower the risk of system corrosion.

[0004] However, transforming deuterated water from laboratory samples into a large-scale industrial product faces enormous technological challenges, with the core bottleneck lying in separation technology. Since light water (H₂O) and deuterated water (HDO, D₂O) are isotopic molecules, their physicochemical properties are extremely similar, especially their molecular weights, resulting in relative volatility (α) approaching 1 (typically around 1.05-1.06). This characteristic means that achieving effective isotopic separation requires extremely high separation stages and very high reflux ratios, leading to staggering energy consumption and equipment investment in traditional distillation methods, making them economically infeasible.

[0005] Currently, there is no technically feasible and cost-controllable deuterium-reduced water production process in the industry. Related deuterium-reduced water products lack unified industry standards, resulting in inconsistent quality, making it impossible to achieve large-scale production, let alone conduct large-scale double-blind experiments on deuterium-reduced water. Summary of the Invention

[0006] The purpose of this invention is to provide an industrial continuous production method and system for deuterated water, using natural water as raw material and employing a vapor compression heat pump distillation process to produce deuterated water products with a deuterated water content that is 1-2 orders of magnitude lower than that of natural water (the deuterated water content in seawater is about 30 ppm, and in freshwater).

[0007] The technical solution adopted in this invention is:

[0008] An industrial continuous production method for deuterium-poor water includes the following steps:

[0009] Distillation separation steps: The preheated feed water is introduced into a distillation column device for distillation. The distillation column device has at least one distillation column packed with structured packing. Deuterated water liquid is enriched at the bottom of the distillation column device, and deuterated water vapor is enriched at the top of the distillation column device.

[0010] Vapor compression step: Deuterium-rich water vapor is drawn from the top deuterium-rich water vapor outlet of the end distillation column and compressed to 1.5 to 2.5 bar by a vapor compressor;

[0011] Condensation heating and product collection steps: The compressed deuterated water vapor is introduced into a condenser to condense and release heat, providing rising steam as a heat source for the distillation column unit; part of the deuterated water obtained from condensation is collected as deuterated water product, and the deuterated water content in the deuterated water product is not higher than 0.3 ppm; the other part is returned to the top of the designated distillation column of the distillation column unit as reflux liquid.

[0012] Furthermore, it includes a raw material supply and preheating step: the raw water is pressurized and then preheated by exchanging heat with the hot fluid drawn from the distillation column unit.

[0013] Furthermore, in the steam compression step, the steam is compressed to 2 bar.

[0014] Furthermore, the content of deuterated water in deuterated aquatic products is more than one order of magnitude lower than that in the raw natural water.

[0015] Furthermore, when the number of distillation columns is greater than 2, a low-deuterium water product is produced with a deuterated water content that is 2 to 3 orders of magnitude lower than that of the raw material natural water.

[0016] Furthermore, the distillation separation step is carried out in a single distillation column; compressed steam is introduced into a condenser located at the bottom of the distillation column to condense into deuterium-rich water, a portion of which is collected as deuterium-rich water product, and the other portion is led to the top of the distillation column as reflux liquid; the heat released by condensation is used to evaporate the liquid at the bottom of the distillation column to generate rising steam; the liquid drawn from the bottom of the distillation column is output as ordinary water or deuterium-rich water byproduct after exchanging heat with the feed water.

[0017] Furthermore, the distillation column apparatus includes a zero-water distillation column and at least one deuteration column, wherein the at least one deuteration column is connected in series from the zero-water distillation column to one side of the zero-water distillation column; the distillation separation steps include: sequentially leading the top vapor of the zero-water distillation column or the deuteration column to the bottom of the next deuteration column as rising vapor, and leading the top vapor of the last deuteration column to a steam compressor to compress it to 1.5 to 2.5 bar to obtain compressed steam; and sequentially recirculating the bottom liquid of each deuteration column back to the top of the previous deuteration column in the opposite direction of the steam flow after passing through a hot water pump, and connecting the bottom liquid of the first deuteration column to the top of the zero-water distillation column via a hot water pump as reflux liquid;

[0018] Condensation heating and product collection steps: Compressed steam is introduced into the condenser located at the bottom of the No. 0 water distillation column to condense the deuterium-rich water. Part of the deuterium-rich water is collected as deuterium-rich water product, and the other part is led to the top of the last deuterium removal column as reflux liquid. The liquid drawn from the bottom of the No. 0 water distillation column is heat-exchanged with the feed water and output as ordinary water or deuterium-rich water by-product.

[0019] Specifically, as a feasible implementation, the distillation column device includes a No. 0 water distillation column and a No. 1 deuterium removal column. The distillation separation step also includes inter-column vapor-liquid exchange: the vapor at the top of the No. 0 water distillation column is introduced into the bottom of the No. 1 deuterium removal column as rising vapor; at the same time, the liquid at the bottom of the No. 1 deuterium removal column is transported to the top of the No. 0 water distillation column as reflux liquid.

[0020] Steam is drawn from the top of the No. 1 deuterium removal tower and compressed. The compressed steam is then introduced into a condenser located at the bottom of the No. 0 water distillation tower. The liquid drawn from the bottom of the No. 0 water distillation tower is then heat-exchanged with the raw water and output as ordinary water or deuterium-rich water as a byproduct.

[0021] Specifically, as a feasible implementation, the distillation column apparatus includes a zero water distillation column and at least two deuteration columns. The distillation separation step further includes multi-stage distillation: steam is passed through the bottom of each column in the direction of zero water distillation column → first deuteration column → second deuteration column → ... → nth deuteration column, while liquid is returned in the opposite direction from the bottom of the nth deuteration column to the top of each preceding column.

[0022] Steam is drawn from the top of the nth deuterium removal column at the end and compressed to 1.5 to 2.5 bar by a steam compressor; the compressed steam is introduced into a condenser located at the bottom of the zero water distillation column; the liquid drawn from the bottom of the zero water distillation column is discharged as ordinary water or deuterium-rich water byproduct after heat exchange with the feed water.

[0023] Furthermore, the distillation column apparatus comprises at least a zero-water distillation column, one or more deuterium removal columns, and one or more deuterium enrichment columns, wherein at least one deuterium removal column is connected in series from the zero-water distillation column to one side of the zero-water distillation column; at least one deuterium enrichment column is connected in series from the zero-water distillation column to the other side of the zero-water distillation column; the distillation separation steps include:

[0024] The top steam from each deuterium enrichment tower is sequentially drawn in reverse order from the nth deuterium removal tower to the bottom of the previous deuterium enrichment tower as rising steam; the top steam from the first deuterium enrichment tower is drawn to the bottom of the zero water distillation tower as rising steam; the top steam from the zero water distillation tower or deuterium removal tower is sequentially drawn to the bottom of the next deuterium removal tower as rising steam, and the top steam from the last deuterium removal tower is drawn to the steam compressor and compressed to 1.5 to 2.5 bar to obtain compressed steam;

[0025] The bottom liquid of each deuteration tower is pumped through a hot water pump and then refluxed in the opposite direction of the steam flow from the bottom of the nth deuteration tower to the top of the previous deuteration tower as reflux liquid. The bottom liquid of the first deuteration tower is connected to the top of the zero water distillation tower via a hot water pump as reflux liquid. The bottom liquid of the zero water distillation tower or the deuterium enrichment tower is refluxed sequentially to the top of the next deuterium enrichment tower as reflux liquid.

[0026] The condensation heating and product extraction steps are as follows: compressed steam is introduced into the condenser located at the bottom of the last deuterium enrichment tower to condense the deuterium-reduced water. Part of the deuterium-reduced water is extracted as deuterium-reduced water product, and the other part of the deuterium-reduced water is led to the top of the last deuterium removal tower as reflux liquid after heat exchange with the raw water in the heat exchange device; liquid is drawn from the bottom of the last deuterium enrichment tower as deuterium-reduced water by-product output.

[0027] Furthermore, as a feasible implementation, the number of deuterium removal towers is the same as the number of deuterium enrichment towers, and the deuterium removal towers and deuterium enrichment towers are arranged symmetrically around the No. 0 water distillation tower.

[0028] Furthermore, it also includes a desalination step: a portion of the liquid is drawn from the deuterated water liquid enrichment end of the distillation column group for desalination treatment to prevent salt accumulation.

[0029] And / or by-product treatment steps: Deuterium-rich water is drawn from the bottom of the distillation column at the end of the distillation column unit as a by-product.

[0030] Furthermore, in the vapor compression cycle step, the outlet pressure of the vapor compressor is determined based on the number of distillation columns and the fluid resistance, so that the operating pressure of the deuterium-containing water vapor is close to atmospheric pressure, and a stable vapor flow closed loop is formed.

[0031] Specifically, the outlet pressure of the steam compressor is determined based on the number of deuterium removal towers and deuterium enrichment towers and the tower resistance. The principle is that the pressure of the last deuterium removal tower should be as close to atmospheric pressure as possible, and the pressure of the last deuterium enrichment tower should be the highest.

[0032] An industrial continuous production system with low deuterium water content, comprising:

[0033] A distillation column apparatus, comprising at least one distillation column, each column being filled with structured packing and having multiple theoretical trays; the distillation column apparatus having a raw water inlet, a deuterated water vapor outlet, and a deuterated water liquid outlet;

[0034] Raw water pressurization device, used to pressurize raw water;

[0035] A heat exchange device is installed between the raw water pressurization device and the distillation column where the raw water interface is located. It is used to exchange heat between the pressurized raw water and the hot distilled water drawn from the bottom of the distillation column where the deuterated water liquid outlet is located in order to heat the raw water, and then draw the heated raw water out to the distillation column where the raw water interface is located.

[0036] A steam compressor is used to compress deuterated water vapor drawn from the top of the distillation column, where the deuterated water vapor outlet of the distillation column unit is located;

[0037] A condenser is installed at the bottom of the distillation column where the deuterated water liquid outlet is located. It is used to condense the compressed deuterated water vapor. The heat released by the condenser is used to evaporate the distilled water at the bottom of the distillation column where the deuterated water liquid outlet is located to generate rising steam. The condenser outputs a portion of the condensed deuterated water as a deuterated water product, and the other portion of the condensed deuterated water is sent back to the reflux port at the top of the distillation column where the deuterated water vapor outlet is located as reflux liquid.

[0038] Furthermore, the raw water inlet is located in the middle of the selected distillation column; the deuterated water vapor outlet is located at the top of the selected distillation column; and the deuterated water liquid outlet is located at the bottom of the selected distillation column.

[0039] Furthermore, the raw water inlet, the deuterated water vapor outlet, and the deuterated water liquid outlet are located on the same distillation column; or the raw water inlet, the deuterated water vapor outlet, and the deuterated water liquid outlet are located on different distillation columns; or the raw water inlet and the deuterated water liquid outlet are located on the same distillation column, and the deuterated water vapor outlet is located on another distillation column.

[0040] Furthermore, the distillation column device includes a distillation column, a raw water inlet in the middle of the distillation column, a low-deuterium water vapor outlet at the top of the distillation column, and a deuterated water liquid outlet at the bottom of the distillation column;

[0041] Raw water is introduced into the raw water inlet in the middle of the distillation column, and distilled water drawn from the deuterated water liquid outlet at the bottom of the distillation column is heat-exchanged by a heat exchanger and then drawn out as ordinary distilled water product.

[0042] Furthermore, the distillation column apparatus includes a zero-water distillation column and at least one deuteration column; the at least one deuteration column is connected in series from the zero-water distillation column to one side of the zero-water distillation column; a raw water inlet is provided in the middle of the zero-water distillation column, and a deuterated water liquid outlet is provided at the bottom of the zero-water distillation column; a low-deuterium water vapor outlet is provided at the top of the last deuteration column furthest from the zero-water distillation column.

[0043] Raw water is introduced into the middle raw water inlet of the No. 0 water distillation column.

[0044] The top steam outlet of the zero water distillation column or deuteration column is sequentially connected to the bottom steam inlet of the next deuteration column, until the last deuteration column. The top steam outlet of the last deuteration column is connected to the steam compressor as a low-deuterium water steam output port.

[0045] The bottom liquid outlet of the last deuterium removal tower is connected to the top reflux inlet of the second-to-last deuterium removal tower via a hot water pump, and then connected to the first deuterium removal tower in sequence. The bottom liquid outlet of the first deuterium removal tower is connected to the top reflux inlet of the zero water distillation tower 1 via a hot water pump.

[0046] The condensation unit is located at the bottom of the No. 0 water distillation column;

[0047] The hot distilled water drawn from the bottom of the No. 0 water distillation column is heat-exchanged by a heat exchanger and then drawn out as ordinary distilled water product.

[0048] Furthermore, the distillation column apparatus includes a zero-water distillation column, one or more deuteration columns, and one or more deuteration enrichment columns. At least one deuteration column is connected in series from the zero-water distillation column to one side of the zero-water distillation column; at least one deuteration enrichment column is connected in series from the zero-water distillation column to the other side of the zero-water distillation column; the top of the last deuteration column furthest from the zero-water distillation column is provided with a low-deuterium water vapor outlet; a raw water interface is provided in the middle of the zero-water distillation column; and a deuterated water liquid outlet is provided at the bottom of the last deuteration enrichment column furthest from the zero-water distillation column; a condenser is provided at the bottom of the last deuteration enrichment column.

[0049] The top steam outlet of the zero water distillation column is connected to the bottom steam inlet of the first deuteration column; the top steam outlet of the first deuteration column is connected to the bottom steam inlet of the next deuteration column, and so on, until the last deuteration column is reached. The top steam outlet of the last deuteration column is connected to the steam compressor as a deuterated water steam outlet; one outlet of the steam compressor is connected to a heat exchanger, and the reflux outlet of the heat exchanger is connected to the top reflux inlet of the last deuteration column.

[0050] The bottom liquid outlet of the last deuterium removal tower is connected to the top reflux inlet of the second-to-last deuterium removal tower via a hot water pump, and so on, sequentially connecting to the first deuterium removal tower. The bottom liquid outlet of the first deuterium removal tower is connected to the top reflux inlet of the zero water distillation tower via a hot water pump. The bottom liquid outlet of the zero water distillation tower is connected to the top reflux inlet of the first deuterium enrichment tower via a hot water pump. The bottom liquid outlet of the first deuterium removal tower is connected to the top reflux inlet of the second deuterium enrichment tower via a hot water pump, and so on, sequentially connecting to the top reflux inlet of the last deuterium enrichment tower, which is furthest from the zero water distillation tower. The bottom liquid outlet of the last deuterium enrichment tower serves as the heavy water outlet.

[0051] The top steam outlet of the last deuterium-enriched column is connected to the bottom steam inlet of the penultimate deuterium-enriched column, and so on, connecting to the first deuterium-enriched column. The top steam outlet of the first deuterium-enriched column is connected to the bottom steam inlet of the zero water distillation column.

[0052] Furthermore, the theoretical number of plates in the distillation column is 60 to 200, and the column height is 60 to 70 meters.

[0053] The present invention, employing the above technical solution, has the following beneficial effects: 1. The raw material is natural water, which is widely available and has a stable supply, eliminating the need for special procurement costs. 2. The production process utilizes a full heat pump distillation process, resulting in a simple equipment structure, controllable engineering costs, and ease of industrialization. 3. The innovative application of a vapor compression heat pump distillation scheme addresses the minimal difference in boiling points between light water and deuterated water, solving the technical pain points of traditional distillation requiring extremely high reflux ratios and theoretical plate numbers, thus significantly reducing distillation energy consumption. 4. Through the coordinated delivery of the rising gas pipeline at the top of the distillation column and the hot water pump for the distillate liquid at the bottom, the parallel distillation columns are integrated into a unified distillation system with a more sufficient number of theoretical plates at a specific height, further optimizing energy consumption performance. Attached Figure Description

[0054] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments;

[0055] Figure 1 This is a schematic diagram illustrating the structural principle of an industrial continuous production system with low deuterium water according to the present invention.

[0056] Figure 2 This is a schematic diagram of a first embodiment of the industrial continuous production of deuterium-rich water according to the present invention;

[0057] Figure 3 This is a schematic diagram of a second embodiment of the industrial continuous production of deuterium-rich water according to the present invention;

[0058] Figure 4 This is a schematic diagram of a third embodiment of the industrial continuous production of deuterium-rich water according to the present invention;

[0059] Figure 5This is a schematic diagram of the fourth embodiment of the industrial continuous production of deuterium-rich water according to the present invention. Detailed Implementation

[0060] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0061] like Figures 1 to 5 As shown in one example, this invention discloses an industrial continuous production method for deuterium-poor water, comprising the following steps:

[0062] Distillation separation steps: The preheated feed water is introduced into a distillation column device for distillation. The distillation column device has at least one distillation column packed with structured packing. Deuterated water liquid is enriched at the bottom of the distillation column device, and deuterated water vapor is enriched at the top of the distillation column device.

[0063] Vapor compression step: Deuterium-rich water vapor is drawn from the top deuterium-rich water vapor outlet of the end distillation column and compressed to 1.5 to 2.5 bar by a vapor compressor;

[0064] Condensation heating and product collection steps: The compressed deuterated water vapor is introduced into a condensation device 3 for condensation and heat release, providing rising steam as a heat source for the distillation column unit; part of the deuterated water obtained from condensation is collected as deuterated water product, and the other part is returned to the top of the designated distillation column of the distillation column unit as reflux liquid.

[0065] Furthermore, it also includes raw material supply and preheating: the raw water is pressurized and then preheated by exchanging heat with the hot fluid drawn from the distillation column unit.

[0066] Furthermore, in the steam compression step, the steam is compressed to 2 bar.

[0067] Furthermore, the content of deuterated water in deuterated aquatic products is more than one order of magnitude lower than that in the raw natural water.

[0068] Furthermore, when the number of distillation columns is greater than 2, a low-deuterium water product is produced with a deuterated water content that is 2 to 3 orders of magnitude lower than that of the raw material natural water.

[0069] Furthermore, the deuterated water content in low-deuterium aquatic products should not exceed 0.3 ppm.

[0070] Furthermore, the distillation separation step is carried out in a single distillation column; compressed vapor is introduced into a condenser 3 located at the bottom of the distillation column to condense the resulting deuterium-rich water. A portion of the deuterium-rich water is collected as a deuterium-rich water product, while the other portion is led to the top of the distillation column as reflux liquid. The heat released by condensation is used to evaporate the liquid at the bottom of the distillation column to generate rising vapor. The liquid drawn from the bottom of the distillation column is output as ordinary water or deuterium-rich water byproduct after exchanging heat with the feed water.

[0071] Further, the distillation column apparatus includes a zero-water distillation column 1 and at least one deuteration column 2, wherein the at least one deuteration column 2 is connected in series from the zero-water distillation column 1 to one side of the zero-water distillation column 1; the distillation separation step includes: sequentially leading the top vapor of the zero-water distillation column 1 or the deuteration column 2 to the bottom of the next deuteration column 2 as rising vapor, and leading the top vapor of the last deuteration column 2 to a steam compressor to compress it to 1.5 to 2.5 bar to obtain compressed steam; and sequentially recirculating the bottom liquid of each deuteration column 2 from the bottom of the nth deuteration column 2 to the top of the previous deuteration column 2 in the opposite direction of the steam flow after passing through a hot water pump as reflux liquid, and connecting the bottom liquid of the first deuteration column 2 to the top of the zero-water distillation column 1 via a hot water pump as reflux liquid;

[0072] Condensation heating and product collection steps: Compressed steam is introduced into the condenser located at the bottom of the No. 0 water distillation column 1 to condense the deuterium-rich water. Part of the deuterium-rich water is collected as deuterium-rich water product, and the other part is led to the top of the last deuterium removal column 2 as reflux liquid. The liquid drawn from the bottom of the No. 0 water distillation column 1 is heat-exchanged with the raw water and output as ordinary water or deuterium-rich water by-product.

[0073] Specifically, as a feasible implementation, the distillation column apparatus includes a zero water distillation column 1 and a first deuterium removal column 2. The distillation separation step also includes inter-column vapor-liquid exchange: the vapor at the top of the zero water distillation column 1 is introduced into the bottom of the first deuterium removal column 2 as rising vapor; at the same time, the liquid at the bottom of the first deuterium removal column 2 is transported to the top of the zero water distillation column 1 as reflux liquid.

[0074] Steam is drawn from the top of the No. 1 deuterium removal tower 2 and compressed. The compressed steam is introduced into the condenser 3 located at the bottom of the No. 0 water distillation tower 1. The liquid drawn from the bottom of the No. 0 water distillation tower 1 is output as ordinary water or deuterium-rich water by-product after heat exchange with the raw water.

[0075] Specifically, as a feasible implementation, the distillation column apparatus includes a zero water distillation column 1 and at least two deuterium removal columns 2. The distillation separation step further includes multi-stage distillation: steam is passed through the bottom of each column in the direction of zero water distillation column 1 → first deuterium removal column 2 → second deuterium removal column 2 → ... → nth deuterium removal column 2, while liquid is returned from the bottom of the nth deuterium removal column 2 to the top of the preceding columns in the opposite direction.

[0076] Steam is drawn from the top of the nth deuterium removal tower 2 at the end and compressed to 1.5 to 2.5 bar by a steam compressor; the compressed steam is introduced into the condenser located at the bottom of the zero water distillation tower 1; the liquid drawn from the bottom of the zero water distillation tower 1 is discharged as ordinary water or deuterium-rich water byproduct after heat exchange with the raw water in the heat exchange device.

[0077] Furthermore, the distillation column apparatus employs at least a zero-water distillation column 1, at least one deuterium removal column 2, and at least one deuterium enrichment column 5, wherein the at least one deuterium removal column 2 is connected in series from the zero-water distillation column 1 to one side of the zero-water distillation column 1; and the at least one deuterium enrichment column 5 is connected in series from the zero-water distillation column 1 to the other side of the zero-water distillation column 1; the distillation separation steps include:

[0078] The top steam of each deuterium enrichment tower 5 is sequentially drawn from the nth deuterium removal tower 2 to the bottom of the previous deuterium enrichment tower 5 as rising steam; the top steam of the first deuterium enrichment tower 5 is drawn to the bottom of the zero water distillation tower 1 as rising steam; the top steam of the zero water distillation tower 1 or the deuterium removal tower 2 is sequentially drawn to the bottom of the next deuterium removal tower 2 as rising steam, and the top steam of the last deuterium removal tower 2 is drawn to the steam compressor and compressed to 1.5 to 2.5 bar to obtain compressed steam;

[0079] The bottom liquid of each deuteration tower 2 is pumped through a hot water pump and then refluxed in the opposite direction to the steam flow from the bottom of the nth deuteration tower 2 to the top of the previous deuteration tower 2 as reflux liquid. The bottom liquid of the first deuteration tower 2 is connected to the top of the zero water distillation tower 1 via a hot water pump as reflux liquid. The bottom liquid of the zero water distillation tower 1 or the deuteration enrichment tower 5 is refluxed sequentially to the top of the next deuteration enrichment tower 5 as reflux liquid.

[0080] The condensation heating and product collection steps are as follows: compressed steam is introduced into the condenser located at the bottom of the zero water distillation column 1 to condense the deuterium-free water obtained. Part of the deuterium-free water is collected as deuterium-free water product, and the other part of the deuterium-free water is led to the top of the last deuterium removal column as reflux liquid after heat exchange with the raw water in the heat exchange device; liquid is drawn from the bottom of the last deuterium enrichment column 5 as deuterium-rich water by-product output.

[0081] Furthermore, as a feasible implementation, the number of deuterium removal towers 2 is the same as the number of deuterium enrichment towers 5, and the deuterium removal towers 2 and deuterium enrichment towers 5 are arranged symmetrically around the zero water distillation tower 1.

[0082] Furthermore, it also includes a desalination step: a portion of the liquid is drawn from the deuterated water liquid enrichment end of the distillation column group for desalination treatment to prevent salt accumulation.

[0083] Furthermore, it also includes a by-product treatment step: drawing deuterium-rich water from the bottom of the distillation column, where deuterated water is enriched at the end of the distillation column unit, as a by-product.

[0084] Furthermore, in the vapor compression cycle step, the outlet pressure of the vapor compressor is determined based on the number of distillation columns and the fluid resistance, so that the operating pressure of the deuterium-containing water vapor is close to atmospheric pressure, and a stable vapor flow closed loop is formed.

[0085] Specifically, the outlet pressure of the steam compressor is determined based on the number of deuterium removal towers 2 and deuterium enrichment towers 5 and the tower resistance. The principle is that the pressure of the last deuterium removal tower 2 should be as close to atmospheric pressure as possible, and the pressure of the last deuterium enrichment tower 5 should be the highest.

[0086] like Figure 1 As shown, an industrial continuous production system with low deuterium water includes:

[0087] A distillation column apparatus, comprising at least one distillation column, each column being filled with structured packing and having multiple theoretical trays; the distillation column apparatus having a raw water inlet, a deuterated water vapor outlet, and a deuterated water liquid outlet;

[0088] Raw water pressurization device, used to pressurize raw water;

[0089] Heat exchange device 4 is installed between the raw water pressurization device and the distillation column where the raw water interface is located. It is used to exchange heat between the pressurized raw water and the hot distilled water drawn from the bottom of the distillation column where the deuterated water liquid outlet is located in order to heat the raw water, and then draw the heated raw water out to the distillation column where the raw water interface is located.

[0090] A steam compressor is used to compress deuterated water vapor drawn from the top of the distillation column, where the deuterated water vapor outlet of the distillation column unit is located;

[0091] The condenser 3 is located at the bottom of the distillation column where the deuterated water liquid outlet is located. It is used to condense the compressed deuterated water vapor. The heat released by the condenser 3 is used to evaporate the distilled water at the bottom of the distillation column where the deuterated water liquid outlet is located to generate rising steam. The condenser outputs a portion of the condensed deuterated water as a deuterated water product, and the other portion of the condensed deuterated water is sent back to the reflux port at the top of the distillation column where the deuterated water vapor outlet is located as reflux liquid.

[0092] Furthermore, the raw water inlet is located in the middle of the selected distillation column; the deuterated water vapor outlet is located at the top of the selected distillation column; and the deuterated water liquid outlet is located at the bottom of the selected distillation column.

[0093] Furthermore, the raw water inlet, the deuterated water vapor outlet, and the deuterated water liquid outlet are located on the same distillation column; or the raw water inlet, the deuterated water vapor outlet, and the deuterated water liquid outlet are located on different distillation columns; or the raw water inlet and the deuterated water liquid outlet are located on the same distillation column, and the deuterated water vapor outlet is located on another distillation column.

[0094] Furthermore, the distillation column device includes a distillation column, a raw water inlet in the middle of the distillation column, a low-deuterium water vapor outlet at the top of the distillation column, and a deuterated water liquid outlet at the bottom of the distillation column;

[0095] Raw water is introduced into the raw water interface in the middle of the distillation column. Distilled water drawn from the deuterated water liquid outlet at the bottom of the distillation column is heat-exchanged by heat exchange device 4 and then drawn out as ordinary distilled water product.

[0096] Furthermore, the distillation column apparatus includes a zero-water distillation column 1 and at least one deuteration column 2; the at least one deuteration column 2 is connected in series from the zero-water distillation column 1 to one side of the zero-water distillation column 1; a raw water inlet is provided in the middle of the zero-water distillation column 1, and a deuterated water liquid outlet is provided at the bottom of the zero-water distillation column 1; a low-deuterium water vapor outlet is provided at the top of the last deuteration column 2 furthest from the zero-water distillation column 1.

[0097] Raw water is introduced into the middle raw water inlet of No. 0 water distillation column 1.

[0098] The top steam outlet of the zero water distillation column 1 or the deuteration column 2 is sequentially connected to the bottom steam inlet of the next deuteration column 2, until the last deuteration column 2. The top steam outlet of the last deuteration column 2 is connected to the steam compressor as a deuterated water steam outlet.

[0099] The bottom liquid outlet of the last deuterium removal tower 2 is connected to the top reflux inlet of the second-to-last deuterium removal tower 2 via a hot water pump, and then connected to the first deuterium removal tower 2 in sequence. The bottom liquid outlet of the first deuterium removal tower 2 is connected to the top reflux inlet of the zero water distillation tower 1 via a hot water pump.

[0100] The condenser 3 is located at the bottom of the zero water distillation column 1;

[0101] The hot distilled water drawn from the bottom of the No. 0 water distillation column 1 is heat-exchanged by the heat exchange device 4 and then drawn out as ordinary distilled water product.

[0102] Furthermore, the distillation column apparatus includes a zero-water distillation column 1, at least one deuterium removal column 2, and at least one deuterium enrichment column 5. The at least one deuterium removal column 2 is connected in series from the zero-water distillation column 1 to one side of the zero-water distillation column 1; the at least one deuterium enrichment column 5 is connected in series from the zero-water distillation column 1 to the other side of the zero-water distillation column 1; the top of the last deuterium removal column 2, which is furthest from the zero-water distillation column 1, is provided with a low-deuterium water vapor outlet; a raw water interface is provided in the middle of the zero-water distillation column 1; and a deuterated water liquid outlet is provided at the bottom of the last deuterium enrichment column 5, which is furthest from the zero-water distillation column 1; a condenser 3 is provided at the bottom of the last deuterium enrichment column 5.

[0103] The top steam outlet of the zero water distillation column 1 is connected to the bottom steam inlet of the first deuteration column 2; the top steam outlet of the first deuteration column 2 is connected to the bottom steam inlet of the next deuteration column 2, and so on, until the last deuteration column 2 is reached. The top steam outlet of the last deuteration column 2 is connected to the steam compressor as a deuterated water steam outlet; one outlet of the steam compressor is connected to a heat exchanger, and the reflux outlet of the heat exchanger is connected to the top reflux inlet of the last deuteration column 2.

[0104] The bottom liquid outlet of the last deuterium removal tower 2 is connected to the top reflux inlet of the second-to-last deuterium removal tower 2 via a hot water pump, and then sequentially connected to the first deuterium removal tower 2. The bottom liquid outlet of the first deuterium removal tower 2 is connected to the top reflux inlet of the zero water distillation tower 1 via a hot water pump. The bottom liquid outlet of the zero water distillation tower 1 is connected to the top reflux inlet of the first deuterium enrichment tower 5 via a hot water pump. The bottom liquid outlet of the first deuterium enrichment tower 5 is connected to the top reflux inlet of the second deuterium enrichment tower 5 via a hot water pump, and then sequentially connected to the top reflux inlet of the last deuterium enrichment tower 5, which is furthest from the zero water distillation tower 1. The bottom liquid outlet of the last deuterium enrichment tower 5 serves as the heavy water outlet.

[0105] The top steam outlet of the last deuterium-enriched column 5 is connected to the bottom steam inlet of the penultimate deuterium-enriched column 5, and so on, connecting to the first deuterium-enriched column 5. The top steam outlet of the first deuterium-enriched column 5 is connected to the bottom steam inlet of the zero water distillation column 1.

[0106] Furthermore, the theoretical number of plates in the distillation column is 60 to 200, and the column height is 60 to 70 meters.

[0107] The specific working principle of the present invention will be described below with reference to several embodiments:

[0108] Example 1

[0109] like Figure 2As shown, the ambient temperature raw water (flow rate approximately 10,000 kg / h) pumped by the original freshwater pump is pressurized and then exchanged with distilled water drawn from the bottom of the water distillation column (deuterium removal column). The water is then fed into the middle section of the distillation column (60-70 theoretical plates from the bottom) to participate in the distillation process. The distilled water, with a lower temperature after heat exchange (flow rate approximately 9,400-9,500 kg / h), is drawn off as ordinary distilled water product.

[0110] The distillation column is approximately 60-70 meters high and filled with structured packing. Deuterium-containing water vapor (approximately 0.3 ppm deuterium, flow rate approximately 10,000 kg / h) drawn from the top of the column is compressed to 1.5-2 bar by a steam compressor and then condensed in a pressure-type deuterium-containing water vapor condenser located at the bottom of the column. The heat released during condensation causes the distilled water at the bottom of the column to evaporate, forming rising stripping vapor. The heat exchange temperature difference in the condenser is controlled at 0.5-2℃. The unevaporated distillate (distilled water) is drawn off and exchanges heat with the raw water in a heat exchanger, ultimately being output as ordinary distilled water. The deuterium-containing water condensed in the deuterium-containing water vapor condenser is pressurized by a hot water pump; 400-500 kg / h is drawn off as deuterium-containing water product, and the remaining 9500-9600 kg / h is sent to the top of the water distillation column as reflux liquid.

[0111] Example 2

[0112] like Figure 3 As shown, the raw water (flow rate 10000 kg / h) pumped under pressure by the raw water pump exchanges heat with the distilled water (rectified liquid, flow rate 9400-9500 kg / h) drawn from the bottom of the No. 0 water distillation column in a heat exchanger. The distilled water then enters the middle section of the No. 0 water distillation column (60 theoretical plates from the bottom upwards) to participate in distillation. The distilled water (rectified liquid) whose temperature drops to near room temperature after heat exchange is then drawn off as ordinary distilled water product.

[0113] Both the No. 0 water distillation column and the No. 1 deuteration column are structured packed columns with a height of 60-70 meters and a theoretical number of 200 trays each. Steam from the top of the No. 0 water distillation column is piped to the bottom of the No. 1 deuteration column as rising gas. The distillate (distilled water) from the bottom of the No. 1 deuteration column is pressurized by a hot water pump and sent to the top of the No. 0 water distillation column as reflux. The deuterated water vapor (0.3 ppm deuterated water content) drawn from the top of the No. 1 deuteration column is compressed to 1.5-2 bar by a steam compressor and condensed in a pressure-type deuterated water condenser located at the bottom of the No. 0 water distillation column. The released heat causes the distilled water (distillate) at the bottom of the No. 0 water distillation column to evaporate and vaporize, forming rising gas. The deuterium-rich water condensed in the condenser is pressurized by a hot water pump. Of this, 9400-9500 kg / h is sent to the top of the No. 1 deuterium removal tower as reflux liquid, and the remaining 500-600 kg / h is drawn out as deuterium-rich water product.

[0114] Example 3

[0115] like Figure 4 As shown, the raw water (flow rate 10000 kg / h) pressurized by the raw water pump exchanges heat with the hot distilled water drawn from the bottom of the No. 0 water distillation column, and then is sent to the middle of the No. 0 water distillation column to participate in distillation. The distilled water with a lower temperature after heat exchange is drawn out as ordinary distilled water product.

[0116] The No. 0 water distillation column, No. 1 deuteration column, and No. 2 deuteration column all have the same specifications: a height of 60-70 meters, internally filled with structured packing material, and approximately 200 theoretical trays. Steam from the top of the No. 0 water distillation column is piped to the bottom of the No. 1 deuteration column as rising gas; the hot distillate (distilled water) from the bottom of the No. 1 deuteration column is pressurized by a hot water pump and sent to the top of the No. 0 water distillation column as reflux. Similarly, steam from the top of the No. 1 deuteration column is piped to the bottom of the No. 2 deuteration column as rising gas; the distillate (distilled water) from the bottom of the No. 2 deuteration column is pressurized by a hot water pump and sent to the top of the No. 1 deuteration column as reflux.

[0117] The deuterated water vapor (flow rate 10000 kg / h, deuterated water content approximately 0.3 ppm) drawn from the top of Deuteration Tower No. 2 is compressed to 1.5-2 bar by a steam compressor and then condensed in the deuterated water vapor condenser located at the bottom of Water Distillation Tower No. 0. The released heat causes the distillate (distilled water) at the bottom of Water Distillation Tower No. 0 to vaporize, forming rising gas. The deuterated water condensed in the condenser is pressurized by a hot water pump, with 9300-9400 kg / h sent to the top of Deuteration Tower No. 2 as reflux liquid, and the remaining 600-700 kg / h drawn out as deuterated water product.

[0118] Example 4

[0119] like Figure 5 As shown, the fresh water (flow rate of about 10,000 kg / h) delivered by the original fresh water booster pump exchanges heat with the deuterium-rich water condensate (flow rate of about 9,300-9,400 kg / h) drawn from the deuterium-rich water vapor condenser located at the bottom of the No. 0 water distillation column, and then is added to the middle of the No. 0 water distillation column to participate in the distillation.

[0120] The specifications of the No. 0 water distillation column, No. 1 deuterium removal column, No. 2 deuterium removal column, No. 3 deuterium removal column, No. 1 deuterium enrichment column, No. 2 deuterium enrichment column, and No. 3 deuterium enrichment column are uniform: the height is 60-70 meters, the interior is filled with structured packing, and the theoretical number of trays is approximately 200. The gas-liquid flow direction of each column is designed as follows: the top vapor of the No. 3 deuterium enrichment column is introduced into the bottom of the No. 2 deuterium enrichment column as rising gas through a pipeline; the top vapor of the No. 2 deuterium enrichment column is introduced into the bottom of the No. 1 deuterium enrichment column as rising gas through a pipeline; the top vapor of the No. 1 deuterium enrichment column is introduced into the bottom of the No. 0 water distillation column as rising gas through a pipeline; the top vapor of the No. 1 deuterium removal column is introduced into the bottom of the No. 2 deuterium removal column as rising gas through a pipeline; the top vapor of the No. 2 deuterium removal column is introduced into the bottom of the No. 3 deuterium removal column as rising gas through a pipeline.

[0121] The reflux liquid delivery paths are as follows: the bottom distillate (distilled water) of the No. 3 deuterium removal tower is pressurized by a hot water pump and sent to the top of the No. 2 deuterium removal tower as reflux liquid; the bottom distillate (distilled water) of the No. 2 deuterium removal tower is pressurized by a hot water pump and sent to the top of the No. 1 deuterium removal tower as reflux liquid; the bottom distillate (distilled water) of the No. 1 deuterium removal tower is pressurized by a hot water pump and sent to the top of the No. 0 water distillation tower as reflux liquid; the bottom distillate (distilled water) of the No. 0 water distillation tower is pressurized by a hot water pump and sent to the top of the No. 1 deuterium enrichment tower as reflux liquid; the bottom distillate (distilled water) of the No. 1 deuterium enrichment tower is pressurized by a hot water pump and sent to the top of the No. 2 deuterium enrichment tower as reflux liquid; the bottom distillate (distilled water) of the No. 2 deuterium enrichment tower is pressurized by a hot water pump and sent to the top of the No. 3 deuterium enrichment tower as reflux liquid.

[0122] The deuterium-rich steam (flow rate 150,000 kg / h) drawn from the top of the No. 3 deuterium removal tower is compressed to 2-2.5 bar by a steam compressor and then fed into a deuterium-rich water steam condenser located at the bottom of the No. 3 deuterium enrichment tower. This condensation releases heat, causing the distillate (deuterium-rich water) at the bottom of the No. 3 deuterium enrichment tower to vaporize and form rising gas. The 150,000 kg of deuterium-rich water condensed in the condenser is pressurized by a hot water pump and first exchanges heat with the raw water. 600-700 kg / h of this water is drawn off as deuterium-rich water product, while the remaining 143,000-144,000 kg / h is sent to the top of the No. 3 deuterium removal tower as reflux. The deuterium-rich water (flow rate approximately 600-700 kg / h) drawn from the bottom of the No. 3 deuterium enrichment tower can be further processed through distillation to produce qualified heavy water product.

[0123] The present invention, employing the above technical solution, has the following beneficial effects: 1. The raw material is natural water, which is widely available and has a stable supply, eliminating the need for special procurement costs. 2. The production process utilizes a full heat pump distillation process, resulting in a simple equipment structure, controllable engineering costs, and ease of industrialization. 3. The innovative application of a vapor compression heat pump distillation scheme addresses the minimal difference in boiling points between light water and deuterated water, solving the technical pain points of traditional distillation requiring extremely high reflux ratios and theoretical plate numbers, thus significantly reducing distillation energy consumption. 4. Through the coordinated delivery of the rising gas pipeline at the top of the distillation column and the hot water pump for the distillate liquid at the bottom, the parallel distillation columns are integrated into a unified distillation system with a more sufficient number of theoretical plates at a specific height, further optimizing energy consumption performance.

[0124] Obviously, the described embodiments are only a part of the embodiments of this application, not all of them. Without conflict, the embodiments and features in the embodiments of this application can be combined with each other. The components of the embodiments of this application described and illustrated herein can generally be arranged and designed in various different configurations. Therefore, the detailed description of the embodiments of this application is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

Claims

1. An industrial continuous production method with low deuterium water content, characterized in that: Includes the following steps: Distillation separation step: The preheated raw water is introduced into a distillation column device for distillation. The distillation column device has at least one distillation column packed with structured packing. Deuterated water liquid is enriched at the bottom of the distillation column of the distillation unit, and deuterated water vapor is enriched at the top of the distillation column of the distillation unit. Vapor compression step: Deuterium-rich water vapor is drawn from the top deuterium-rich water vapor outlet of the end distillation column and compressed to 1.5 to 2.5 bar by a vapor compressor; Condensation heating and product collection steps: The compressed deuterated water vapor is introduced into a condenser to condense and release heat, providing rising steam as a heat source for the distillation column unit; part of the deuterated water obtained from condensation is collected as deuterated water product, and the deuterated water content in the deuterated water product is not higher than 0.3 ppm; the other part is returned to the top of the designated distillation column of the distillation column unit as reflux liquid.

2. The industrial continuous production method for deuterium-poor water according to claim 1, characterized in that: It includes the raw material supply and preheating steps: the raw water is pressurized and then preheated by exchanging heat with the hot fluid drawn from the distillation column unit.

3. The industrial continuous production method for deuterium-poor water according to claim 1, characterized in that: The distillation separation step is carried out in a single distillation column; compressed steam is introduced into a condenser located at the bottom of the distillation column to condense into deuterium-rich water. Part of the deuterium-rich water is collected as deuterium-rich water product, and the other part is led to the top of the distillation column as reflux liquid; the heat released by condensation is used to evaporate the liquid at the bottom of the distillation column to generate rising steam; the liquid drawn from the bottom of the distillation column is output as ordinary water or deuterium-rich water byproduct after exchanging heat with the feed water.

4. The industrial continuous production method for deuterium-poor water according to claim 1, characterized in that: The distillation column unit includes a zero water distillation column and one or more deuterium removal columns, which are connected in series from the zero water distillation column to one side of the zero water distillation column. The distillation separation steps include: sequentially guiding the top vapor of the zero water distillation column or deuteration column to the bottom of the next deuteration column as rising vapor, and guiding the top vapor of the last deuteration column to a steam compressor to compress it to 1.5 to 2.5 bar to obtain compressed steam; passing each deuteration column bottom liquid through a hot water pump and flowing in the opposite direction of the steam from the bottom of the last deuteration column back to the top of the previous deuteration column as reflux liquid, and connecting the bottom liquid of the first deuteration column to the top of the zero water distillation column via a hot water pump as reflux liquid; Condensation heating and product collection steps: Compressed steam is introduced into the condenser located at the bottom of the No. 0 water distillation column to condense the deuterium-rich water. Part of the deuterium-rich water is collected as deuterium-rich water product, and the other part is led to the top of the last deuterium removal column as reflux liquid. The liquid drawn from the bottom of the No. 0 water distillation column is heat-exchanged with the feed water and output as ordinary water or deuterium-rich water by-product.

5. The industrial continuous production method for deuterium-poor water according to claim 1, characterized in that: The distillation column unit comprises at least a zero water distillation column, one or more deuterium removal columns and one or more deuterium enrichment columns, with the one or more deuterium removal columns connected in series from the zero water distillation column to one side of the zero water distillation column. At least one deuterium-enriched column is connected in series from the zero water distillation column to the other side of the zero water distillation column; The distillation separation steps include: The top steam from each deuterium enrichment tower is sequentially drawn from the last deuterium removal tower to the bottom of the previous deuterium enrichment tower as rising steam; the top steam from the first deuterium enrichment tower is drawn to the bottom of the zero water distillation tower as rising steam; the top steam from the zero water distillation tower or deuterium removal tower is sequentially drawn to the bottom of the next deuterium removal tower as rising steam, and the top steam from the last deuterium removal tower is drawn to the steam compressor and compressed to 1.5 to 2.5 bar to obtain compressed steam; The bottom liquid of each deuteration tower is pumped through a hot water pump and then flows back in the opposite direction of the steam from the bottom of the last deuteration tower to the top of the previous deuteration tower as reflux liquid. The bottom liquid of the first deuteration tower is connected to the top of the zero water distillation tower via a hot water pump as reflux liquid. The bottom liquid of the zero water distillation column or the deuterium enrichment column is sequentially refluxed to the top of the next deuterium enrichment column as reflux liquid. The condensation heating and product extraction steps are as follows: compressed steam is introduced into the condenser located at the bottom of the last deuterium enrichment tower to condense the deuterium-reduced water. Part of the deuterium-reduced water is extracted as deuterium-reduced water product, and the other part of the deuterium-reduced water is led to the top of the last deuterium removal tower as reflux liquid after heat exchange with the raw water in the heat exchange device; liquid is drawn from the bottom of the last deuterium enrichment tower as deuterium-reduced water by-product output.

6. The industrial continuous production method for deuterium-poor water according to claim 1, characterized in that: It also includes a desalination step: a portion of the liquid is drawn from the deuterated water liquid enrichment end of the distillation column group for desalination treatment to prevent salt accumulation; And / or by-product processing steps: Deuterium-rich water is drawn from the bottom of the distillation column at the end of the distillation unit as a by-product to serve as feed water for further vertical production of heavy water.

7. An industrial continuous production system for deuterium-reduced water, employing the industrial continuous production method for deuterium-reduced water according to any one of claims 1 to 6, characterized in that: The system includes: A distillation column apparatus, comprising at least one distillation column, each column being filled with structured packing and having multiple theoretical trays; the distillation column apparatus having a raw water inlet, a deuterated water vapor outlet, and a deuterated water liquid outlet; Raw water pressurization device, used to pressurize raw water; A heat exchange device is installed between the raw water pressurization device and the distillation column where the raw water interface is located. It is used to exchange heat between the pressurized raw water and the hot distilled water drawn from the bottom of the distillation column where the deuterated water liquid outlet is located in order to heat the raw water, and then draw the heated raw water out to the distillation column where the raw water interface is located. A steam compressor is used to compress deuterated water vapor drawn from the top of the distillation column, where the deuterated water vapor outlet of the distillation column unit is located; A condenser is installed at the bottom of the distillation column where the deuterated water liquid outlet is located. It is used to condense the compressed deuterated water vapor. The heat released by the condenser is used to evaporate the distilled water at the bottom of the distillation column where the deuterated water liquid outlet is located to generate rising steam. The condenser outputs a portion of the condensed deuterated water as a deuterated water product, and the other portion of the condensed deuterated water is sent back to the reflux port at the top of the distillation column where the deuterated water vapor outlet is located as reflux liquid.

8. An industrial continuous production system with low deuterium water according to claim 7, characterized in that: The distillation column unit includes a distillation column, a raw water inlet in the middle of the distillation column, a low-deuterium water vapor outlet at the top of the distillation column, and a deuterated water liquid outlet at the bottom of the distillation column; Raw water is introduced into the raw water inlet in the middle of the distillation column, and distilled water drawn from the deuterated water liquid outlet at the bottom of the distillation column is heat-exchanged by a heat exchanger and then drawn out as ordinary distilled water product.

9. An industrial continuous production system with low-deuterium water according to claim 7, characterized in that: The distillation column unit includes a zero-water distillation column and one or more deuterium removal columns; the one or more deuterium removal columns are connected in series from the zero-water distillation column to one side of the zero-water distillation column. The No. 0 water distillation column has a raw water inlet in the middle and a deuterated water liquid outlet at the bottom. The top of the last deuteration column, which is furthest from the No. 0 water distillation column, has a low-deuterium water vapor outlet. Raw water is introduced into the middle raw water inlet of the No. 0 water distillation column. The top steam outlet of the zero water distillation column or deuteration column is sequentially connected to the bottom steam inlet of the next deuteration column, until the last deuteration column. The top steam outlet of the last deuteration column is connected to the steam compressor as a low-deuterium water steam output port. The bottom liquid outlet of the last deuterium removal tower is connected to the top reflux inlet of the second-to-last deuterium removal tower via a hot water pump, and then sequentially connected to the first deuterium removal tower. The bottom liquid outlet of the first deuterium removal tower is connected to the top reflux inlet of the zero water distillation tower via a hot water pump. The condensation unit is located at the bottom of the No. 0 water distillation column; The hot distilled water drawn from the bottom of the No. 0 water distillation column is heat-exchanged by a heat exchanger and then drawn out as ordinary distilled water product.

10. An industrial continuous production system with low-deuterium water according to claim 7, characterized in that: The distillation column unit includes a zero-water distillation column, one or more deuterium removal columns, and one or more deuterium enrichment columns. The one or more deuterium removal columns are connected in series from the zero-water distillation column to one side of the zero-water distillation column. At least one deuterium enrichment column is connected in series from the zero-water distillation column to the other side of the zero-water distillation column. The top of the last deuterium removal column, which is furthest from the zero-water distillation column, is provided with a low-deuterium water vapor outlet. A raw water inlet is located in the middle of the No. 0 water distillation column, and a deuterated water liquid outlet is located at the bottom of the last deuterated column, which is far away from the No. 0 water distillation column; a condensation device is located at the bottom of the last deuterated column. The top steam outlet of the zero water distillation column is connected to the bottom steam inlet of the first deuteration column; the top steam outlet of the first deuteration column is connected to the bottom steam inlet of the next deuteration column, and so on, until the last deuteration column is reached. The top steam outlet of the last deuteration column is connected to the steam compressor as a deuterated water steam outlet; one outlet of the steam compressor is connected to a heat exchanger, and the reflux outlet of the heat exchanger is connected to the top reflux inlet of the last deuteration column. The bottom liquid outlet of the last deuterium removal tower is connected to the top reflux inlet of the second-to-last deuterium removal tower via a hot water pump, and then sequentially connected to the first deuterium removal tower. The bottom liquid outlet of the first deuterium removal tower is connected to the top reflux inlet of the zero water distillation tower via a hot water pump. The bottom liquid outlet of the No. 0 water distillation column is connected to the top reflux inlet of the first deuterium enrichment column via a hot water pump. The bottom liquid outlet of the first deuterium removal column is connected to the top reflux inlet of the second deuterium enrichment column via a hot water pump. This connection is made sequentially to the top reflux inlet of the last deuterium enrichment column, which is furthest from the No. 0 water distillation column. The bottom liquid outlet of the last deuterium enrichment column serves as the heavy water outlet. The top steam outlet of the last deuterium-enriched column is connected to the bottom steam inlet of the penultimate deuterium-enriched column, and so on, connecting to the first deuterium-enriched column. The top steam outlet of the first deuterium-enriched column is connected to the bottom steam inlet of the zero water distillation column.

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