A sort of 14 Continuous production device for C isotope separation

Abstract

This application belongs to the field of carbon isotope separation technology and aims to solve the problems of the existing equipment, such as the large number of devices, large floor space, and complex operation. 14 The continuous production device for separation of C isotopes includes at least one absorption and extraction tower and several absorption and enrichment towers. The top of each absorption and enrichment tower is connected to the kettle of the absorption and enrichment tower of the previous stage through a pipeline. The top of the first absorption and enrichment tower is connected to the kettle of the last absorption and extraction tower. The CO2 gas is absorbed by the absorption section of the absorption and extraction tower, and extracted by the extraction section of the absorption and extraction tower. 14 C isotope, absorbs CO2 gas through the absorption section of the absorption enrichment tower, and extracts it through the extraction section of the absorption enrichment tower 14 C isotope, the last stage enrichment and desorption kettle is connected to the last stage absorption and enrichment tower kettle through a pipeline, and is connected to the tower kettle through another pipeline. 14 CO2 gas collection device. This application will be able to reduce the number of equipment and floor space, and is simple to operate.

Description

Technical Field

[0001] This application belongs to the field of carbon isotope separation technology, and in particular relates to a 14 Continuous production device for separation of C isotopes. Background Art

[0002] There are fifteen isotopes of carbon ( 8 C~ 22 C), where 12 C and 13 C is a stable isotope, and the rest are radioactive isotopes. 14 C, the others are short half-life isotopes, so the carbon isotopes in nature are mainly 12 C. 13 C and 14 C exists in three forms. 14 C is a pure β-decay isotope with a β-ray energy of 156keV, a maximum range of 22cm in air, and a half-life of 5730a. Compared with other radioactive isotopes, it has the advantages of low energy, easy protection, and no need to consider decay correction when used. 14 C is suitable for use as a tracer and has been widely used in chemistry, biology, medicine, agriculture, industry and other fields to reveal reaction mechanisms, metabolic mechanisms and material migration pathways, etc., especially in the promotion and application of Helicobacter pylori (Hp) detection, which has greatly promoted the development of 14 The development of C isotopes.

[0003] With the nuclear experiment research in the 1940s and the continuous development and utilization of nuclear energy resources, human nuclear activities have released a large amount of 14 C, which has led to the worldwide 14 The background value of C has increased significantly, which may have a long-term impact on the environment. 14 C emissions have become a major concern, and major nuclear power countries have strengthened their control over nuclear power plants. 14 If these emissions are treated with volume reduction and separation and recovery of 14 C isotopes will have significant social and economic benefits.

[0004] Carbon neutrality in natural abundance 14 The content of C is extremely low, and it is difficult to obtain high-abundance C through enrichment and separation methods. 14 C isotope. Therefore, 14 The separation of C isotopes currently mainly comes from nuclear reaction preparation or nuclear power plant waste. 14C isotope products can not only produce high value-added products, but also reduce nuclear pollution and protect the ecological environment. Therefore, this field has received great attention in recent years and is also an important direction for future carbon isotope separation research and development.

[0005] To this end, Chinese patent CN202111084972.X discloses a carbon-14 isotope separation device that uses a chemical exchange method to perform isotope separation through a gas phase cascade. Unlike existing devices, this device eliminates the absorption section of each stage and reduces the amount of liquid phase analysis in each stage of the decomposition kettle, resulting in low abundance after analysis. 14 C gas and the high abundance of the latter stage 14 This backmixing of C gases reduces the separation efficiency of the exchange towers at this stage, making the entire device closer to an ideal cascade. While this reduces energy consumption, it still does not address the existing system's numerous components, low level of integration, large floor space, high exchange tower heights, high pressure drops, and complex operation. Currently, there is no solution to these shortcomings. Summary of the Invention

[0006] The purpose of this application is to provide a 14 The continuous production device for C isotope separation solves the problems of existing production devices such as the large number of equipment, large floor space, and complex operation.

[0007] In order to achieve the above objectives, this application provides the following technical solutions:

[0008] A sort of 14 A continuous production device for separation of C isotopes comprises at least one absorption and extraction tower and several absorption and enrichment towers. The top of each absorption and enrichment tower is connected to the kettle of the absorption and enrichment tower of the previous stage through a pipeline, and the top of the first absorption and enrichment tower is connected to the kettle of the last absorption and extraction tower.

[0009] Each stage of the absorption and extraction tower has an absorption section and an extraction section. The absorption section of the absorption and extraction tower absorbs CO2 gas, and the extraction section of the absorption and extraction tower extracts CO2 gas. 14 C isotope, discharged from the top of the first-stage absorption and extraction tower 12 CO2 gas;

[0010] Each stage of the absorption and enrichment tower has an absorption section and an extraction section. The absorption section of the absorption and enrichment tower absorbs CO2 gas, and the extraction section of the absorption and enrichment tower extracts CO2. 14 C isotope, the composite absorption liquid is heated and analyzed in the enrichment and analysis kettle to enrich 14The CO2 gas and composite absorbent of C enter the next stage absorption and enrichment tower; the decomposition gas of the last stage enrichment and decomposition kettle is divided into two streams, one is connected to the last stage absorption and enrichment tower kettle, and the other is connected to the 14 CO2 gas collection device.

[0011] As an practicable manner, the absorption section of the absorption and extraction tower and the extraction section of the absorption and extraction tower are integrated into an extraction baffle tower, the extraction baffle tower is filled with fillers, the absorption section of the absorption and extraction tower is arranged in the upper section, and the extraction section of the absorption and extraction tower is arranged in the lower section.

[0012] As an practicable manner, the absorption section of the absorption and enrichment tower and the extraction section of the absorption and enrichment tower are integrated into an enrichment baffle tower, the enrichment baffle tower is filled with fillers, the absorption section of the absorption and enrichment tower is arranged in the upper section, and the extraction section of the absorption and enrichment tower is arranged in the lower section.

[0013] As an practicable manner, the device comprises a primary absorption and extraction tower and a tertiary absorption and enrichment tower;

[0014] The first-stage absorption and extraction tower includes the first-stage absorption and extraction tower and the first-stage extraction and desorption kettle, and the kettle of the first-stage absorption and extraction tower is connected to the first-stage extraction and desorption kettle through a pipeline;

[0015] The three-stage absorption and enrichment tower includes a first-stage absorption and enrichment tower and a first-stage enrichment and desorption kettle, a second-stage absorption and enrichment tower and a second-stage enrichment and desorption kettle, a third-stage absorption and enrichment tower and a third-stage enrichment and desorption kettle. The kettle of each absorption and enrichment tower is connected to the enrichment and desorption kettle of the same stage through a pipeline. The gas coming out of the top of the third-stage enrichment and desorption kettle is divided into two streams, one of which is connected to the kettle of the third-stage absorption and enrichment tower, and the other is connected to the 14 CO2 gas collection device.

[0016] As an practicable manner, the kettle of the first-stage absorption and extraction tower is connected to the top of the first-stage absorption and enrichment tower via a pipeline, and the top of the first-stage absorption and extraction tower is connected to the top of the first-stage absorption and enrichment tower via a pipeline. 12 CO2 gas collection device connection.

[0017] As an practicable manner, the top of the first-stage extraction and desorption kettle is connected to the middle section of the first-stage absorption and enrichment tower through a pipeline, the bottom of the first-stage extraction and desorption kettle is connected to the top of the second-stage absorption and enrichment tower through a second liquid transfer pump, the bottom of the second-stage enrichment and desorption kettle is connected to the top of the first-stage absorption and enrichment tower through a fourth liquid transfer pump, the bottom of the first-stage enrichment and desorption kettle is connected to the top of the third-stage absorption and enrichment tower through a third liquid transfer pump, and the bottom of the third-stage enrichment and desorption kettle is connected to the top of the first-stage absorption and extraction tower through a first liquid transfer pump.

[0018] As an implementable approach, 14 The CO2 raw gas of C is introduced into the middle section of the first-stage absorption and enrichment tower.

[0019] As an practicable manner, the absorption and extraction tower and the absorption and enrichment tower are baffle towers, which include an annular baffle, a liquid seal device, a gas reflux pipe, a liquid reflux pump, and a liquid reflux pipe. The annular baffle divides the cylinder into an inner cylinder and an outer cylinder. The gas phase connects the inner cylinder and the outer cylinder through the gas reflux pipe and flows from the upper part of the inner cylinder into the upper packing layer. The liquid phase of the upper packing layer flows into the next packing through the liquid seal device. The liquid phase of the outer cylinder is connected to the inner cylinder through the liquid reflux pump and the liquid reflux pipe to realize reverse continuous flow of gas and liquid phases in the baffle tower.

[0020] As an practicable manner, the inner cylinder is provided with an inner cylinder filler, the outer cylinder is provided with an outer cylinder filler, and the liquid sealing device has a U-shaped tube structure.

[0021] As an practicable method, the device includes a two-stage absorption and extraction tower and a five-stage absorption and enrichment tower, both of which are 8 meters high and have a diameter not exceeding 300 mm. The filler used is a porous structured nickel filler.

[0022] Compared with the prior art, the present application provides 14 The continuous production device for C isotope separation has the following beneficial effects:

[0023] In traditional processes, the absorption and extraction towers consist of two towers: an absorption tower and an extraction tower. This application integrates them into a single tower. Similarly, the absorption and enrichment towers also consist of two towers: an absorption tower and an enrichment tower. This application integrates them into a single tower. These two changes reduce the number of towers by half, thereby reducing the number of equipment and floor space. This reduced equipment footprint simplifies operation.

[0024] Furthermore, these towers all adopt the form of partition towers, which have a higher theoretical plate number at the same height and the height of the tower equipment is also reduced.

[0025] The continuous production device provided by the present invention adopts 14 The square cascade of C isotope separation, the gas phase flows step by step in the exchange tower, and the liquid composite absorbent is pumped between the extraction tower and the enrichment tower, not in a step-by-step manner, but in a staggered mixed manner, to achieve liquid and gas phase separation between the towers. 14 The effect of increasing the abundance gradient of C isotopes increases the driving force of chemical exchange mass transfer, improves the separation efficiency, shortens the equilibrium time, and obtains 14 The C isotope abundance is even higher, reaching over 99%.

[0026] Furthermore, the continuous production apparatus provided by the present invention utilizes a uniquely designed baffled tower, which increases the wettability of the packing surface, improves chemical exchange efficiency, and reduces packing and tower height. Furthermore, the new baffled tower has only one desorption reactor, effectively sharing one with two towers. This reduces the number of towers and reactors, lowering energy consumption and reducing floor space. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solution of this application, the following is a brief introduction to the drawings required for the technical description.

[0028] Figure 1 Provided in the embodiments of this application 14 Schematic diagram of the structure of a continuous production device for C isotope separation;

[0029] Figure 2 This is a schematic diagram of the structure of the baffle tower provided in the embodiment of the present application.

[0030] Description of reference numerals:

[0031] 1. First stage absorption and extraction tower; 2. First stage absorption and enrichment tower; 3. Second stage absorption and enrichment tower; 4. Third stage absorption and enrichment tower; 5. First stage extraction and desorption kettle; 6. First stage enrichment and desorption kettle; 7. Second stage enrichment and desorption kettle; 8. Third stage enrichment and desorption kettle; 9. First liquid feed pump; 10. Second liquid feed pump; 11. Third liquid feed pump; 12. Fourth liquid feed pump; 13. CO2 feed gas; 14. 14 CO2 gas collection device; 15. 12 CO2 gas collection device;

[0032] 101. Annular partition; 102. Liquid sealing device; 103. Gas return pipe; 104. Liquid return pump; 105. Liquid return pipe; 106. Inner tube filling with packing; 107. Outer tube filling with packing. DETAILED DESCRIPTION

[0033] The following is further detailed description through specific implementation methods.

[0034] This application provides a 14 The continuous production device for C isotope separation uses a chemical exchange method to separate carbon isotopes, including several stages of absorption and extraction towers and absorption and enrichment towers.

[0035] The absorption and extraction tower can be set up in several levels according to the needs of the extraction section. Each level of the absorption and extraction tower includes an absorption section, an extraction section and a desorption kettle. The absorption section and the extraction section are integrated in a uniquely designed extraction baffle tower, which is filled with metal or non-metal porous medium structured packing. The upper section of the extraction baffle tower is the absorption section, which mainly completes the purpose of the composite absorbent absorbing CO2 gas; the lower section of the extraction baffle tower is the extraction section, which mainly completes the exchange and extraction of saturated composite absorption liquid and CO2 gas. 14 The purpose of C isotope extraction is to connect the top of the baffle tower to the upper absorption and extraction tower, and the baffle tower kettle (the lower part of the tower without fillers) is connected to the desorption kettle. The composite absorption liquid is heated and decomposed in the desorption kettle to enrich 14 C of CO2 gas and composite absorbent, the gas enters the next level absorption extraction tower (or absorption enrichment tower).

[0036] The absorption and enrichment tower can be set up in several stages according to the requirements of the enrichment section. Each stage of the absorption and enrichment tower includes an absorption section, an enrichment section and a desorption kettle. The absorption section and the enrichment section are integrated in a uniquely designed enrichment baffle tower, which is filled with metal or non-metal structured packing. The upper section of the enrichment baffle tower is the absorption section, which mainly completes the purpose of the composite absorbent absorbing CO2 gas; the lower section of the enrichment baffle tower is the enrichment section, which mainly completes the exchange and enrichment of the saturated composite absorption liquid and CO2 gas. 14 The purpose of C isotope enrichment is to connect the top of the enrichment baffle tower to the upper absorption enrichment tower (or absorption extraction tower), and the kettle of the enrichment baffle tower is connected to the desorption kettle. The composite absorption liquid is heated and decomposed in the desorption kettle (the enrichment desorption kettle of the same level) to enrich 14 C's CO2 gas and composite absorbent, the gas enters the next level absorption and enrichment tower.

[0037] The top of each absorption and enrichment tower is connected to the kettle of the previous absorption and enrichment tower through a gas transmission pipeline. The top of the first-stage absorption and enrichment tower is connected to the kettle of the last-stage absorption and extraction tower. The top of the first-stage absorption and extraction tower discharges lean gas ( 12 CO2 gas). The liquid phase of each stage of the desorption kettle is connected to the top of different absorption and enrichment towers (absorption and extraction towers) through interstage transfer pumps (first liquid transfer pump, second liquid transfer pump, third liquid transfer pump, fourth liquid transfer pump, etc.). The desorption gas of the last stage of enrichment and desorption kettle is divided into two streams, one is connected to the last stage of absorption and enrichment tower kettle, and the other is connected to the 14 CO2 gas collection device.

[0038] Furthermore, the flow of the liquid phase in each stage of the decomposition kettle adopts a mixed flow process. Taking the first-stage absorption and extraction tower and the three-stage absorption and enrichment tower process as an example, the liquid phase of the first-stage extraction and decomposition kettle can be connected to the top of the second-stage absorption and enrichment tower through a liquid transfer pump, and the liquid phase of the second-stage enrichment and decomposition kettle is connected to the top of the first-stage absorption and enrichment tower through a liquid transfer pump, and then the liquid phase of the first-stage enrichment and decomposition kettle is connected to the top of the third-stage absorption and enrichment tower through a liquid transfer pump, and finally the liquid phase of the third-stage enrichment and decomposition kettle is connected back to the top of the first-stage absorption and extraction tower through a liquid transfer pump.

[0039] Furthermore, the extraction baffle tower and the enrichment baffle tower both adopt the baffle tower type. The uniquely designed baffle tower adopts annular baffles to divide the tower into concentric inner and outer cylinders. Each area can be filled with the same or different fillers. Gas reflux pipes, liquid reflux pumps, liquid reflux pipes and liquid sealing devices are used to achieve gas-liquid absorption and exchange.

[0040] Furthermore, the composite absorbent is an ionic liquid or a mixed solution containing multiple organic alkaline compounds.

[0041] Furthermore, the metal or non-metal structured packing is a porous medium structured packing made of foamed metal or foamed non-metal.

[0042] The absorption and extraction tower and the absorption and enrichment tower used in this application are both of the partition plate tower type.

[0043] Example 1

[0044] like Figure 1 As shown, embodiment 1 provides a 14 The continuous production device for separation of C isotopes comprises a first-stage absorption and extraction tower and a third-stage absorption and enrichment tower.

[0045] The first-stage absorption and extraction tower comprises a first-stage absorption and extraction tower 1 and a first-stage extraction and desorption kettle 5 . The kettle of the first-stage absorption and extraction tower 1 is connected to the first-stage extraction and desorption kettle 5 through a pipeline.

[0046] The three-stage absorption and enrichment tower includes the first-stage absorption and enrichment tower 2 and the first-stage enrichment and desorption kettle 6, the second-stage absorption and enrichment tower 3 and the second-stage enrichment and desorption kettle 7, the third-stage absorption and enrichment tower 4 and the third-stage enrichment and desorption kettle 8. The kettle of each absorption and enrichment tower is connected to the enrichment and desorption kettle of the same stage through a pipeline. Finally, the gas coming out of the top of the third-stage enrichment and desorption kettle 8 is divided into two streams, one of which is connected to the kettle of the third-stage absorption and enrichment tower 4, and the other is connected to the kettle of the third-stage absorption and enrichment tower 4. 14 CO2 gas collection device 14.

[0047] The top of each absorption and enrichment tower is connected to the tower kettle of the absorption and enrichment tower of the previous level through a gas pipeline. Only the top of the first-level absorption and enrichment tower 2 is connected to the tower kettle of the first-level absorption and extraction tower 1 through a gas pipeline. The top of the first-level absorption and extraction tower 1 is connected to the tower kettle of the first-level absorption and extraction tower 1 through a gas pipeline. 12 The top of the first stage extraction and desorption kettle 5 is connected to the middle section of the first stage absorption and enrichment tower 2 through a gas pipeline, and the bottom of the first stage extraction and desorption kettle 5 is connected to the top of the second stage absorption and enrichment tower 3 through a second liquid transfer pump 10.

[0048] The top of each enrichment and desorption kettle is connected to the middle section of the next stage absorption and enrichment tower through a gas pipeline. The bottom of the second stage enrichment and desorption kettle 7 is connected to the top of the first stage absorption and enrichment tower 2 through the fourth liquid transfer pump 12. The bottom of the first stage enrichment and desorption kettle 6 is connected to the top of the third stage absorption and enrichment tower 4 through the third liquid transfer pump 11. The bottom of the third stage enrichment and desorption kettle 8 is connected to the top of the first stage absorption and extraction tower 1 through the first liquid transfer pump 9. 14 The CO2 raw gas 13 of C is introduced into the middle section of the first-stage absorption and enrichment tower 2.

[0049] The continuous production device provided in Example 1 can achieve continuous production through continuous feeding.

[0050] Example 2

[0051] Example 2 is a further improvement based on the structure of Example 1. The absorption and extraction tower and the absorption and enrichment tower provided in Example 2 are both uniquely designed baffle towers.

[0052] like Figure 2 As shown, an annular partition 101 divides the tower into an inner and outer cylinder. A gas reflux line 103 connects the inner and outer cylinders, with the gas phase flowing from the upper portion of the inner cylinder into the upper packing layer. The liquid phase of the upper packing layer then flows into the lower packing layer through a liquid seal 102. This U-shaped tube structure seals the lower and upper packing layers, effectively separating them from the gas. The liquid phase of the outer cylinder is connected to the inner cylinder via a liquid reflux pump 104 and a liquid reflux line 105, enabling countercurrent continuous flow of the gas and liquid phases within the partition tower.

[0053] The partition tower is provided with two packing areas, an inner cylinder packing 106 and an outer cylinder packing 107. Figure 2 As shown, the filling fillers include metallic or non-metallic porous medium structured fillers, the metals include foamed nickel, foamed aluminum, etc., and the non-metals include foamed ceramics, foamed glass, carbon aerogel, etc. The two filling areas can be filled with different fillers respectively.

[0054] The absorbent in each stage of the absorption and extraction tower and the absorption and enrichment tower is an ionic liquid or a mixed solution containing multiple organic alkaline compounds.

[0055] The continuous production device provided in Example 2 can achieve continuous production through continuous feeding.

[0056] Example 3

[0057] The continuous production device provided in Example 3 consists of a two-stage absorption and extraction tower and a five-stage absorption and enrichment tower. The remaining structures and connection relationships refer to Examples 1 and 2. Due to the use of efficient foamed nickel porous structured packing, the production device of this embodiment can achieve high abundance. 14 For C isotope production, the detailed specifications of the towers at each level in Example 3 are shown in Table 1.

[0058] Table 1 Tower specifications

[0059]

[0060] The composite absorbent introduced into the absorption and extraction tower is a mixed solution of diethanolamine and ethanol, with a diethanolamine concentration of 1 mol / L. 14 The C isotope CO2 raw gas 13 is introduced into the first stage absorption and enrichment tower at 5m at a rate of 120L / h. 14 The abundance of C is 1.1%, and the temperature in each absorption and extraction tower and absorption and enrichment tower is 25℃ and the pressure is 0.1MPa. Finally, CO2 gas is discharged from the top of the first absorption and extraction tower 1. 14 The abundance of C isotope is 0.011%, the gas flow rate is 119.5L / h, and the CO2 gas discharged from the top of the fifth stage enrichment and desorption reactor is 14 The abundance of C isotopes is 85%, and the gas flow rate is 0.5L / h, achieving high abundance. 14 Continuous production of C isotopes.

[0061] The continuous production device provided in Example 3 can achieve continuous production through continuous feeding.

[0062] Example 4

[0063] The continuous production device provided in Example 4 consists of a first-stage absorption and extraction tower and a third-stage absorption and enrichment tower. The remaining structures and connections are similar to those in Example 1 and Example 2. Due to the use of efficient foamed aluminum porous structured packing, this embodiment can achieve high abundance. 14 The detailed specifications of each column of Example 4 are shown in Table 2.

[0064] Table 2 Tower specifications

[0065]

[0066] The composite absorbent introduced into the absorption and extraction tower is a mixed solution of diethanolamine and ethanol, with a diethanolamine concentration of 1 mol / L. 14The C isotope CO2 raw gas 13 is introduced into the first stage absorption and enrichment tower at 10m at a rate of 600L / h. 14 The abundance of C is 1.1%, the temperature in each absorption and extraction tower and absorption and enrichment tower is 20℃, and the pressure is 0.14MPa. Finally, CO2 gas is discharged from the top of the first absorption and extraction tower 1. 14 The abundance of C isotope is 0.011%, the gas flow rate is 598.4L / h, and the CO2 gas discharged from the top of the third stage enrichment and desorption reactor is 14 The abundance of the C isotope is 99%, and the gas flow rate is 1.6 L / h.

[0067] The continuous production device provided in Example 4 can achieve continuous production through continuous feeding.

[0068] The above description is only a specific implementation method of the present application, but the scope of protection of the present application is not limited thereto. Any changes or replacements that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed in this application should be covered by the scope of protection of the present application.

Claims

1. A 14 The continuous production device for separation of C isotopes is characterized in that It includes at least one absorption and extraction tower and several absorption and enrichment towers. The top of each absorption and enrichment tower is connected to the kettle of the previous absorption and enrichment tower through a pipeline. The top of the first absorption and enrichment tower is connected to the kettle of the last absorption and extraction tower. Each stage of the absorption and extraction tower has an absorption section and an extraction section. The absorption section of the absorption and extraction tower absorbs CO2 gas, and the extraction section of the absorption and extraction tower extracts CO2 gas. 14 C isotope; Each stage of the absorption and enrichment tower has an absorption section and an extraction section. The absorption section of the absorption and enrichment tower absorbs CO2 gas, and the extraction section of the absorption and enrichment tower extracts CO2. 14 C isotope, the composite absorption liquid is heated and analyzed in the enrichment and analysis kettle to enrich 14 C's CO2 gas and composite absorbent, the gas enters the next stage absorption and enrichment tower; the last stage enrichment and desorption kettle is connected to the last stage absorption and enrichment tower kettle through a pipeline, and is connected through another pipeline 14 CO2 gas collecting device (14); The device includes a first-stage absorption and extraction tower and a third-stage absorption and enrichment tower; The first-stage absorption and extraction tower comprises a first-stage absorption and extraction tower (1) and a first-stage extraction and desorption kettle (5), wherein the kettle of the first-stage absorption and extraction tower (1) is connected to the first-stage extraction and desorption kettle (5) via a pipeline; The three-stage absorption and enrichment tower comprises a first-stage absorption and enrichment tower (2) and a first-stage enrichment and desorption kettle (6), a second-stage absorption and enrichment tower (3) and a second-stage enrichment and desorption kettle (7), a third-stage absorption and enrichment tower (4) and a third-stage enrichment and desorption kettle (8), wherein the kettle of each absorption and enrichment tower is connected to the enrichment and desorption kettle of the same stage through a pipeline, and the gas coming out of the top of the third-stage enrichment and desorption kettle (8) is divided into two streams, one of which is connected to the kettle of the third-stage absorption and enrichment tower (4) and the other is connected to the 14 CO2 gas collecting device (14); The top of the first-stage extraction and desorption kettle (5) is connected to the middle section of the first-stage absorption and enrichment tower (2) through a pipeline, the bottom of the first-stage extraction and desorption kettle (5) is connected to the top of the second-stage absorption and enrichment tower (3) through a second liquid transfer pump (10), the bottom of the second-stage enrichment and desorption kettle (7) is connected to the top of the first-stage absorption and enrichment tower (2) through a fourth liquid transfer pump (12), the bottom of the first-stage enrichment and desorption kettle (6) is connected to the top of the third-stage absorption and enrichment tower (4) through a third liquid transfer pump (11), and the bottom of the third-stage enrichment and desorption kettle (8) is connected to the top of the first-stage absorption and extraction tower (1) through a first liquid transfer pump (9).

2. according to claim 1 14 The continuous production device for separation of C isotopes is characterized in that The absorption section of the absorption and extraction tower and the extraction section of the absorption and extraction tower are integrated into an extraction baffle tower. The extraction baffle tower is filled with fillers. The absorption section of the absorption and extraction tower is arranged in the upper section, and the extraction section of the absorption and extraction tower is arranged in the lower section.

3. according to claim 1 14 The continuous production device for separation of C isotopes is characterized in that The absorption section of the absorption and enrichment tower and the extraction section of the absorption and enrichment tower are integrated into an enrichment baffle tower, the enrichment baffle tower is filled with fillers, the absorption section of the absorption and enrichment tower is arranged in the upper section, and the extraction section of the absorption and enrichment tower is arranged in the lower section.

4. according to claim 1 14 The continuous production device for separation of C isotopes is characterized in that The bottom of the first-stage absorption and extraction tower (1) is connected to the top of the first-stage absorption and enrichment tower (2) through a pipeline, and the top of the first-stage absorption and extraction tower (1) is connected to the top of the first-stage absorption and enrichment tower (2) through a pipeline. 12 The CO2 gas collecting device (15) is connected.

5. according to claim 1 14 The continuous production device for separation of C isotopes is characterized in that contain 14 The CO2 raw gas (13) of C is introduced into the middle section of the first-stage absorption and enrichment tower (2).

6. according to claim 1 14 The continuous production device for separation of C isotopes is characterized in that The absorption and extraction tower and the absorption and enrichment tower are baffle towers, and the baffle tower comprises an annular baffle (101), a liquid sealing device (102), a gas reflux pipe (103), a liquid reflux pump (104), and a liquid reflux pipe (105). The annular baffle (101) divides the cylinder into an inner cylinder and an outer cylinder. The gas phase connects the inner cylinder and the outer cylinder through the gas reflux pipe (103) and flows from the upper part of the inner cylinder into the upper packing layer. The liquid phase of the upper packing layer flows into the lower packing through the liquid sealing device (102). The liquid phase of the outer cylinder is connected to the inner cylinder through the liquid reflux pump (104) and the liquid reflux pipe (105), so as to realize reverse continuous flow of gas and liquid phases in the baffle tower.

7. according to claim 6 14 The continuous production device for separation of C isotopes is characterized in that The inner cylinder is provided with an inner cylinder filling filler (106), the outer cylinder is provided with an outer cylinder filling filler (107), and the liquid sealing device (102) has a U-shaped tube structure.

8. according to claim 1 14 The continuous production device for separation of C isotopes is characterized in that The device comprises a two-stage absorption and extraction tower and a five-stage absorption and enrichment tower, both of which are 8m high and no more than 300mm in diameter, and the filler used is a porous structured nickel foam filler.

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