On-site efficient extraction system for dissolved inorganic carbon in water

Abstract

The present invention discloses an on-site efficient extraction system for dissolved inorganic carbon in water, which belongs to the technical field of inorganic carbon extraction. The system comprises a water bath tub, wherein an inner plate is detachably installed horizontally in the water bath tub, and sample jacks are distributed on the inner plate for placing a reactor storing a water sample. The reactor is detachably installed below a metal pipe, and an injection extraction unit is provided above the metal pipe. The injection extraction unit injects phosphoric acid into the water sample in the reactor and completes an acidification reaction, while temporarily storing the generated CO2. An extension frame is provided on the inner wall of the water bath tub, and the extension frame is used to place a heating pack. The present invention can realize efficient on-site inorganic carbon extraction, avoid the exchange and dissolution of inorganic carbon, and facilitate subsequent research.

Description

Technical Field

[0001] The invention belongs to the technical field of inorganic carbon extraction, and in particular relates to an on-site efficient extraction system for inorganic carbon dissolved in water. Background Art

[0002] The carbon in water is mainly soluble inorganic carbon (DIC), which is mainly composed of CO2, H2CO3, HCO3 - and CO3 2- Composition: CO2 dissolved in water is the main carbon source for autotrophic organisms to synthesize organic matter in aquatic ecosystems. Dissolved inorganic carbon in water is an important carrier for carbon cycle research. The current method for extracting dissolved inorganic carbon in water is to collect water samples and bring them back to the laboratory to add phosphoric acid for acidification, and then convert H2CO3 and HCO3 into - and CO3 2- Converted into CO2 and then extracted.

[0003] During long-distance transportation, the dissolved inorganic carbon in the water is easily exchanged with the atmosphere, causing pollution. At the same time, it takes a lot of manpower, material resources and financial resources to transport the water samples back from the sampling point, which is not conducive to the research on carbon cycle in water bodies. At the same time, due to the simple outdoor extraction facilities and unstable heating sources, the efficiency of inorganic carbon extraction is low.

[0004] Therefore, it is necessary to provide an on-site efficient extraction system for dissolved inorganic carbon in water to solve the problems raised in the above background technology. Summary of the Invention

[0005] To achieve the above objectives, the present invention provides the following technical solutions: an on-site efficient extraction system for dissolved inorganic carbon in water, comprising a water bath with a foldable structure, wherein an inner plate is detachably mounted horizontally within the water bath, and sample jacks are distributed on the inner plate for placing a reactor storing a water sample. The reactor is detachably mounted below a metal pipe, and an injection and extraction unit is disposed above the metal pipe. The injection and extraction unit injects phosphoric acid into the water sample in the reactor to complete the acidification reaction and temporarily stores the generated CO2.

[0006] The injection and extraction unit is further detachably and hermetically connected to a sealed bottle via a metal pipe, and the sealed bottle seals and stores the collected CO2;

[0007] An extension rack is provided on the inner wall of the water bath, and the extension rack is used to place a heating pack;

[0008] The reactor is provided with a central cavity in the middle, and the reactor is divided into several independent sample chambers outside the central cavity by isolation ribs, wherein water samples are distributed in each sample chamber, and the sample chambers are connected to the central cavity. A flow control mechanism is provided in the central cavity, and the flow control mechanism adjusts the flow rate of the water samples in each sample chamber and the central cavity based on the heat release process of the heating pack, so that the phosphoric acid in the water sample in each sample chamber can be dissolved in multiple stages with the corresponding amount of water sample at a specified temperature.

[0009] Further, as a preference, the injection and extraction unit comprises an outer cylinder, which is provided with a plurality of independent chambers therein; a connection disk is fixed at the lower interior of the outer cylinder, and an inner channel is opened in the connection disk at each independent chamber; a sealing seat is fixed at the lower center of the outer cylinder, and a plurality of channels are distributed on the sidewall of the sealing seat, and each of the channels is connected to the inner channel in a one-to-one correspondence;

[0010] A vacuum pump is provided in one of the independent chambers, and an air pipe is vertically provided below the sealing seat. One end of the air pipe is connected to the vacuum pump through a channel, and the other end of the air pipe is connected to the sample chamber through multiple branch pipes for evacuating the sample chamber. A pressure chamber is provided below the vacuum pump in the independent chamber, and a pressure sensor is provided in the pressure chamber.

[0011] The other independent chamber stores a phosphoric acid reagent, which is injected into each sample cavity correspondingly by the negative pressure in each sample cavity, thereby dissolving into the water sample;

[0012] A limit rod is vertically arranged in the other independent chamber, and a piston is slidably connected to the limit rod. A needle tube is vertically arranged below the sealing seat, and the needle tube can be slidably inserted into the reactor and connected to each sample chamber.

[0013] Further, as a preference, an inner rod is vertically connected to the middle of the outer cylinder, the inner rod is rotatably connected to the outer cylinder, an inner sleeve is fixed in the center of the connecting disk, and a plurality of top shafts corresponding to the inner track are radially slidably distributed on the inner sleeve; a conducting block is slidably connected to the connecting disk, a conducting port is opened in the middle of the conducting block, and the conducting port is connected to or staggered with the inner track during the sliding adjustment of the conducting block;

[0014] A supporting spring is provided between the conducting block and the connecting disk, and one end of the top shaft is connected to the conducting block;

[0015] An eccentric cam is fixed to the end of the inner rod, and a rotating disk is installed on the upper end of the inner rod.

[0016] Furthermore, preferably, a gas control system is provided in another independent chamber in the outer cylinder, and the gas control system is used to provide pneumatic control to the flow control mechanism in the reactor.

[0017] Further, as a preference, the flow control mechanism includes an inner shaft cylinder, which is coaxially slidably arranged in the middle cavity, a plurality of outer holes are opened on the side wall of the middle cavity, and an inner hole is opened on the inner shaft cylinder, and the inner holes correspond to the outer holes one by one; a middle rod is vertically slidably connected in the middle cavity, and the inner shaft cylinder is fixed to the middle rod;

[0018] A shaft sleeve is sealed at the lower part of the middle cavity, and the middle rod is vertically connected to the shaft sleeve, with a flow gap left between the middle rod and the shaft sleeve;

[0019] A positioning ring is fixed below the shaft sleeve, and a plurality of side holes are distributed on the circumference of the positioning ring. A blocking member is fixed at the end of the middle rod, and the blocking member is slidingly connected in the positioning ring.

[0020] An inner spring is connected below the blockage;

[0021] A plurality of bottom holes are distributed on the circumference of the bottom of the inner shaft cylinder.

[0022] Furthermore, as a preference, the blockage is disengaged from the side hole when the middle rod slides downward, and the water sample in the sample cavity enters the middle cavity through the side hole, and then flows through the bottom hole into the inner shaft cylinder. At this time, the inner hole and the outer hole are still in a staggered distribution; and when the middle rod slides to the bottom, the inner hole and the outer hole on the inner shaft cylinder are correspondingly connected, and at this time the water sample enters the inner shaft cylinder from the inner hole.

[0023] Furthermore, preferably, an inner plug is sealingly and slidingly connected to the inner shaft tube, and the inner plug is slidingly sleeved on the middle rod. An air vent tube is vertically arranged above the middle cavity, and the upper end of the air vent tube is connected to the air control system in the liquid injection and extraction unit through a sealing seat.

[0024] Furthermore, preferably, the air control system can provide continuous air pressure regulation or pulsed air pressure regulation.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The liquid injection extraction unit used in the present invention can extract and temporarily store the CO2 generated after the water sample in the sample chamber of the reactor is mixed with phosphoric acid, thereby achieving efficient on-site inorganic carbon extraction, avoiding the exchange and dissolution of inorganic carbon, and facilitating subsequent research; the flow control mechanism set in the reactor can also adaptively adjust the flow rate of the water sample in the sample chamber according to the simple on-site heating environment and the heating temperature, so that the phosphoric acid in the water sample can be dissolved in multiple stages with an appropriate amount of water sample at a specified temperature, thereby improving the reaction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the present invention;

[0028] Figure 2 Schematic diagram of the structure of the inner cavity and sample cavity of the reactor in the present invention;

[0029] Figure 3 Schematic diagram of the structure of the liquid injection and extraction unit in the present invention;

[0030] Figure 4 for Figure 3 A in the middle is an enlarged schematic diagram;

[0031] Figure 5 Schematic diagram of the structure of the flow control mechanism of the present invention;

[0032] Figure 6 Schematic diagram of the structure of the shaft sleeve and the positioning ring in the present invention;

[0033] In the figure: 1. water bath; 11. extension frame; 12. inner plate; 2. liquid injection and extraction unit; 21. outer cylinder; 22. independent chamber; 23. connecting plate; 231. inner channel; 24. sealing seat; 25. channel; 26. vacuum pump; 27. piston; 28. air pipe; 29. ​​pressure chamber; 3. reactor; 31. middle cavity; 32. sample chamber; 4. metal pipe; 41. inner rod; 42. turntable; 43. inner sleeve; 44. top shaft; 45. conduction block; 451. conduction port; 46. eccentric cam; 5. flow control mechanism; 51. inner shaft cylinder; 511. inner hole; 512. bottom hole; 52. outer hole; 53. middle rod; 54. sleeve; 55. positioning ring; 551. side hole; 56. blockage; 6. inner plug; 61. air duct. DETAILED DESCRIPTION

[0034] See also Figures 1-6 In an embodiment of the present invention, a system for efficiently extracting dissolved inorganic carbon in water on-site includes a water bath 1 with a foldable structure for easy storage. An inner plate 12 is detachably mounted horizontally in the water bath 1. Sample jacks are distributed on the inner plate 12 for placing a reactor 3 storing a water sample. The reactor 3 is detachably mounted below a metal pipe 4. A liquid injection and extraction unit 2 is disposed above the metal pipe 4. The liquid injection and extraction unit 2 injects phosphoric acid into the water sample in the reactor 3 to complete the acidification reaction and temporarily stores the generated CO2.

[0035] The injection and extraction unit 2 is also detachably and hermetically connected to a sealed bottle via a metal pipe 4, and the sealed bottle seals and stores the collected CO2;

[0036] An extension frame 11 is provided on the inner wall of the water bath 1, and the extension frame 11 is used to place a heating pack (made of roasted diatomaceous earth, iron powder, aluminum powder, coke powder, activated carbon, salt, quicklime, and sodium carbonate, prepared in a certain proportion);

[0037] The reactor 3 has a central cavity 31 in the middle. The interior of the reactor 3 is divided into several independent sample chambers 32 by insulating ribs at the periphery of the central cavity 31. A water sample is distributed in each sample chamber 32, which is in communication with the central cavity 31. A flow control mechanism 5 is provided within the central cavity 31. Based on the heat release process of the heating pack, the flow control mechanism 5 adjusts the flow rate of the water sample in each sample chamber 32 and the central cavity 31, so that the phosphoric acid in the water sample in each sample chamber 32 can undergo multi-stage dissolution with the appropriate amount of water sample at a specified temperature. By adjusting the flow rate in real time to match the instantaneous temperature, the chemical reaction rate can be maximized within the optimal temperature range, shortening the reaction cycle and improving overall production efficiency. This ensures that the system can maintain efficient operation under different heating conditions or non-ideal environments, thereby enhancing process stability and reliability. Furthermore, the flow control mechanism 5 ensures that the mixing ratio of phosphoric acid and water sample is just right, thereby achieving optimal chemical reaction conditions in each dissolution stage and improving product purity and yield.

[0038] In this embodiment, the injection and extraction unit 2 includes an outer cylinder 21, which is provided with a plurality of independent compartments 22. A connecting disk 23 is fixed to the lower portion of the outer cylinder 21. An inner channel 231 is provided in the connecting disk 23 at each independent compartment 22. A sealing seat 24 is fixed to the lower center of the outer cylinder 21. A plurality of channels 25 are distributed on the sidewalls of the sealing seat 24. Each channel 25 is connected to an inner channel 231 in a one-to-one correspondence.

[0039] A vacuum pump 26 is provided in one of the independent chambers 22. The vacuum pump is mainly used to extract the vacuum in the reactor. An air pipe 28 is vertically provided below the sealing seat 24. One end of the air pipe 28 is connected to the vacuum pump 26 through a channel 25. The other end of the air pipe 28 is connected to the sample chamber 32 through multiple branch pipes for evacuating the sample chamber 32. A pressure chamber 29 is provided below the vacuum pump 26 in the independent chamber 22. A pressure sensor is provided in the pressure chamber 29.

[0040] The other independent chamber 22 stores a phosphoric acid reagent, and 85% of the phosphoric acid reagent is injected into each sample cavity 32 by the negative pressure in each sample cavity 32, thereby dissolving into the water sample;

[0041] A limit rod is vertically provided in the other independent chamber 22, and a piston 27 is slidably connected to the limit rod. A needle tube is vertically provided below the sealing seat 24, and the needle tube can be slidably inserted into the reactor 3 and connected to each of the sample chambers 32, so that the CO2 generated by the reaction can be extracted through the piston, wherein the piston can be manually pulled by an external pull rod or controlled and driven by an additional pulling device (the above are all existing technologies and will not be repeated here).

[0042] As a preferred embodiment, an inner rod 41 is vertically connected to the middle of the outer cylinder 21, and the inner rod 41 is rotatably connected to the outer cylinder 21. An inner sleeve 43 is fixed in the center of the connecting disk 23, and a plurality of top shafts 44 corresponding to the inner channel 231 are radially slidably distributed on the inner sleeve 43; a conducting block 45 is slidably connected to the connecting disk 23, and a conducting port 451 is opened in the middle of the conducting block 45. The conducting port 451 is connected to or staggered with the inner channel 231 during the sliding adjustment of the conducting block 45;

[0043] A support spring is provided between the conducting block 45 and the connecting plate 23 , and one end of the top shaft 44 is connected to the conducting block 45 ;

[0044] An eccentric cam 46 is fixed to the end of the inner rod 41, and a turntable 42 is installed on the upper end of the inner rod 41. That is, the staff manually rotates the turntable so that the corresponding inner channel 231 in each independent bin is connected with the channel in the sealing seat, thereby adjusting the injection and extraction unit to perform appropriate injection or extraction work at different stages.

[0045] In this embodiment, a gas control system (not shown in the figure) is provided in the other independent chamber 22 in the outer cylinder 21 , and the gas control system is used to provide pneumatic control to the flow control mechanism 5 in the reactor 3 .

[0046] In this embodiment, the flow control mechanism 5 includes an inner shaft cylinder 51, which is coaxially slidably arranged in the middle cavity 31. A plurality of outer holes 52 are formed on the side wall of the middle cavity 31. The inner shaft cylinder 51 is formed with an inner hole 511, and the inner holes 511 correspond to the outer holes 52 one by one. A middle rod 53 is vertically slidably connected in the middle cavity 31, and the inner shaft cylinder 51 is fixed to the middle rod 53.

[0047] A shaft sleeve 54 is sealed at the lower portion of the middle cavity 31 , and the middle rod 53 is vertically inserted into the shaft sleeve 54 , with a flow gap being left between the middle rod 53 and the shaft sleeve 54 ;

[0048] A positioning ring 55 is fixed below the shaft sleeve 54 , and a plurality of side holes 551 are distributed around the circumference of the positioning ring 55 . A stopper 56 is fixed at the end of the middle rod 53 , and the stopper 56 is sealingly and slidably connected in the positioning ring 55 .

[0049] An inner spring is connected below the obstruction 56;

[0050] The inner shaft cylinder 51 has a plurality of bottom holes 512 distributed around its bottom. The water sample in the sample chamber can enter the middle chamber through the outer holes, and can also enter the middle chamber through the bottom holes 512 below the inner shaft cylinder, thereby facilitating flow and mixing and improving reaction uniformity.

[0051] In this embodiment, the obstruction 56 disengages from the side hole 551 as the middle rod 53 slides downward, and the water sample in the sample chamber 32 enters the middle chamber 31 through the side hole 551, and then flows through the bottom hole 512 into the inner cylinder 51. At this time, the inner hole 511 and the outer hole 52 are still staggered. When the middle rod 53 slides to the lowest position, the inner hole 511 and the outer hole 52 on the inner cylinder 51 are connected, and the water sample enters the inner cylinder 51 through the inner hole 511. It should be noted that during water sample collection and storage, the water sample is distributed in each sample chamber. At this time, the sample chamber and the middle chamber are not connected, and the amount of water sample in each sample chamber is the same. However, with the injection of the phosphoric acid reagent in the first stage, the water sample in the sample chamber can enter the middle chamber for mixing and flow. This improves mixing uniformity and effectively controls the amount of water sample in each sample chamber, thereby precisely controlling the ratio of reactants and the reaction volume based on the heating environment, creating ideal conditions for the chemical reaction. An electric driver (not shown) can be provided above the reactor to drive the middle rod up and down.

[0052] As a preferred embodiment, the inner shaft cylinder 51 is sealed and slidingly connected with an inner plug 6, and the inner plug 6 is slidably sleeved on the middle rod 53. An air vent tube 61 is vertically arranged above the middle cavity 31, and the upper end of the air vent tube 61 is connected to the air control system in the injection and extraction unit 2 through the sealing seat 24.

[0053] In this embodiment, the gas control system can provide continuous or pulsed gas pressure regulation. That is, the gas control system can regulate the upward and downward movement of the inner plug by gas pressure regulation. At this time, the inner plug can pump the water sample in the sample chamber into the middle chamber through the bottom hole. Specifically, the phosphoric acid injection process can be divided into multiple stages based on the heat release curve of the heating pack. In each stage, the vertical adjustment of the inner plug can effectively change the flow rate of the water sample in each sample chamber, so that the water sample flow rate matches the ambient heating temperature. In this case, the upward and downward reciprocating movement of the inner plug caused by the pulsed gas pressure regulation of the gas control system can control the water sample in the sample chamber and the water sample in the middle chamber to fully exchange (while continuously injecting an appropriate amount of phosphoric acid). As the ambient temperature changes, the inner plug adjusts the flow rate of the water sample in the sample chamber accordingly (appropriately increasing the phosphoric acid injection), allowing the system to automatically adjust to different temperature conditions, ensuring that the water sample flow rate is precisely matched to the temperature requirements, thereby improving the environmental adaptability and robustness of the entire system. This not only quickly achieves a uniform solution state, but also maintains ideal chemical reaction conditions through the continuous and appropriate injection of phosphoric acid, further improving the reaction rate and efficiency.

[0054] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. On-site efficient extraction system of dissolved inorganic carbon in water, characterized by: The invention comprises a water bath (1) with a foldable structure, wherein an inner plate (12) is detachably mounted horizontally in the water bath (1), and sample jacks are distributed on the inner plate (12) for placing a reactor (3) storing a water sample, wherein the reactor (3) is detachably mounted below a metal pipe (4), and an injection and extraction unit (2) is arranged above the metal pipe (4), wherein the injection and extraction unit (2) injects phosphoric acid into the water sample in the reactor (3) to complete an acidification reaction, and temporarily stores the generated CO2; The liquid injection and extraction unit (2) is also detachably and hermetically connected to a sealed bottle via a metal pipe (4); An extension frame (11) is provided on the inner wall of the water bath tub (1), and the extension frame (11) is used to place a heating pack; A middle cavity (31) is provided in the middle of the reactor (3), and the reactor (3) is divided into a plurality of independent sample cavities (32) located outside the middle cavity (31) by an isolation rib plate, and the sample cavities (32) are connected to the middle cavity (31); a flow control mechanism (5) is provided in the middle cavity (31), and the flow control mechanism (5) adjusts the flow rate of the water sample in each sample cavity (32) and the middle cavity (31) based on the heat release process of the heating pack, so that the phosphoric acid in the water sample in each sample cavity (32) can be dissolved in multiple stages with the corresponding amount of water sample at a specified temperature; The flow control mechanism (5) includes an inner shaft cylinder (51) coaxially slidably arranged in the middle cavity (31), a plurality of outer holes (52) are provided on the side wall of the middle cavity (31), an inner hole (511) is provided on the inner shaft cylinder (51), and the inner hole (511) corresponds to the outer hole (52) one by one; a middle rod (53) is vertically slidably connected in the middle cavity (31), and the inner shaft cylinder (51) and the middle rod (53) are fixed; A shaft sleeve (54) is provided in a sealed manner at the lower portion of the middle cavity (31), and the middle rod (53) is vertically connected to the shaft sleeve (54), with a flow gap being left between the middle rod (53) and the shaft sleeve (54); A positioning ring (55) is fixed below the shaft sleeve (54), and a plurality of side holes (551) are distributed on the circumference of the positioning ring (55). A blocking (56) is fixed at the end of the middle rod (53), and the blocking (56) is sealingly slidably connected in the positioning ring (55); An inner spring is connected to the lower side of the obstruction (56); The bottom circumference of the inner shaft cylinder (51) is distributed with a plurality of bottom holes (512); An inner plug (6) is sealingly and slidingly connected to the inner shaft cylinder (51), and the inner plug (6) is slidably sleeved on the middle rod (53).

2. The on-site efficient extraction system for dissolved inorganic carbon in water according to claim 1, characterized in that: The sealed bottle seals and stores the collected CO2; wherein the water samples are distributed in each sample cavity (32); The injection and extraction unit (2) comprises an outer cylinder (21) having a plurality of independent chambers (22) disposed therein; a connecting disk (23) is fixed at the lower portion of the inner portion of the outer cylinder (21); an inner channel (231) is provided in the connecting disk (23) at each independent chamber (22); a sealing seat (24) is fixed at the lower center of the outer cylinder (21); a plurality of channels (25) are distributed on the sidewall of the sealing seat (24); and each channel (25) is connected to the inner channel (231) in a one-to-one correspondence; A vacuum pump (26) is provided in one of the independent chambers (22), and an air pipe (28) is vertically provided below the sealing seat (24). One end of the air pipe (28) is connected to the vacuum pump (26) through a channel (25), and the other end of the air pipe (28) is connected to the sample chamber (32) through a plurality of branch pipes for evacuating the sample chamber (32); A pressure chamber (29) is provided in the independent chamber (22) below the vacuum pump (26), and a pressure sensor is provided in the pressure chamber (29); The other independent chamber (22) stores a phosphoric acid reagent, which is injected into each sample cavity (32) correspondingly through the negative pressure in each sample cavity (32), thereby dissolving into the water sample; A limit rod is vertically arranged in the other independent chamber (22), and a piston (27) is slidably connected to the limit rod. A needle tube is vertically arranged below the sealing seat (24), and the needle tube can be slidably inserted into the reactor (3) and connected to each sample chamber (32).

3. The on-site efficient extraction system for dissolved inorganic carbon in water according to claim 2, characterized in that: The middle of the outer cylinder (21) is vertically connected to an inner rod (41), and the inner rod (41) is rotatably connected to the outer cylinder (21). An inner sleeve (43) is fixed at the center of the connecting disk (23), and a plurality of top shafts (44) corresponding to the inner path (231) are radially slidably distributed on the inner sleeve (43); a conducting block (45) is slidably connected to the inside of the connecting disk (23), and a conducting port (451) is provided in the middle of the conducting block (45), and the conducting port (451) is connected to or staggered with the inner path (231) during the sliding adjustment of the conducting block (45); A supporting spring is provided between the conducting block (45) and the connecting disk (23), and one end of the top shaft (44) is connected to the conducting block (45); An eccentric cam (46) is fixed to the end of the inner rod (41), and a rotating disk (42) is mounted on the upper end of the inner rod (41).

4. The on-site efficient extraction system for dissolved inorganic carbon in water according to claim 2, characterized in that: A gas control system is provided in the other independent chamber (22) in the outer cylinder (21), and the gas control system is used to provide pneumatic control to the flow control mechanism (5) in the reactor (3).

5. The on-site efficient extraction system for dissolved inorganic carbon in water according to claim 2, characterized in that: The obstruction (56) is separated from the side hole (551) when the middle rod (53) slides downward, and the water sample in the sample cavity (32) enters the middle cavity (31) through the side hole (551), and then flows through the bottom hole (512) into the inner shaft cylinder (51). At this time, the inner hole (511) and the outer hole (52) are still in a staggered distribution; and when the middle rod (53) slides to the bottom, the inner hole (511) and the outer hole (52) on the inner shaft cylinder (51) are correspondingly connected, and at this time, the water sample enters the inner shaft cylinder (51) from the inner hole (511).

6. The on-site efficient extraction system for dissolved inorganic carbon in water according to claim 4, characterized in that: An air vent tube (61) is vertically provided above the middle cavity (31), and the upper end of the air vent tube (61) is connected to the air control system in the liquid injection and extraction unit (2) through a sealing seat (24).

7. The on-site efficient extraction system for dissolved inorganic carbon in water according to claim 6, characterized in that: The gas control system can provide continuous gas pressure regulation or pulsed gas pressure regulation.

Images