A high-efficiency capture device for low-to-moderate concentrations of carbon dioxide

Abstract

This invention relates to the field of carbon dioxide capture device technology and discloses a high-efficiency carbon dioxide capture device for low to medium concentrations. The device includes a capture tank with a quick-change section and a stirring section. The quick-change section includes a hollow block positioned above the capture tank. A cylindrical groove is formed within the hollow block, and a rectangular groove is formed on the outer wall of the cylindrical groove. A spring damper is fixedly connected to the top inner wall of the rectangular groove, and a locking rod is fixedly connected to the bottom of the spring damper. The outer wall of the locking rod is slidably connected to the inner wall of the cylindrical groove, and the locking rod is also slidably connected to the hollow block. This invention, by incorporating a quick-change section, solves the problem of existing capture devices being inconvenient to disassemble and assemble filter components, often requiring repeated disassembly and reassembly of bolts and other fasteners, reducing the convenience of equipment maintenance and failing to meet the needs of frequent experiments and equipment cleaning in laboratory settings.

Description

Technical Field

[0001] This invention relates to the field of capture device technology, specifically to a high-efficiency capture device for medium and low concentrations of carbon dioxide. Background Technology

[0002] With the deepening research in the field of carbon capture and resource utilization, small-scale experimental low-concentration carbon dioxide capture devices have become core experimental equipment for exploring carbon capture reaction mechanisms and optimizing process operating parameters at the laboratory level. The capture efficiency and ease of operation of such devices directly determine the accuracy and reliability of experimental data, and play an important supporting role in the subsequent research and development of industrial carbon capture technologies.

[0003] In laboratory research settings, the low-to-medium concentration carbon dioxide gas source to be treated is mostly an artificially prepared clean gas mixture. Compared to industrial gas sources, it does not require complex pretreatment processes such as demisting and cooling. However, to avoid small amounts of suspended particles in the gas source clogging or contaminating the collection medium and affecting the stability of the collection effect, targeted filtration treatment of the gas source is still necessary. This places clear demands on the adaptability of the filtration function of small-scale experimental carbon dioxide capture devices.

[0004] However, existing small-scale experimental low-concentration carbon dioxide capture devices have significant drawbacks in practical applications: the disassembly and assembly of their filter components are cumbersome, generally relying on repeated disassembly and tightening of bolts and other fasteners to replace or clean the filter components. This disassembly and assembly method not only involves many steps and is time-consuming, significantly reducing the convenience of equipment maintenance, but also makes it difficult to adapt to the needs of frequent experiments and regular equipment cleaning in laboratory settings, thus adversely affecting the progress of experiments and the stability of experimental results.

[0005] Therefore, developing a small carbon dioxide capture device with easy-to-disassemble filter components that is compatible with low-concentration clean gas sources in laboratories has become an urgent technical problem to be solved in the field of laboratory carbon capture research. Summary of the Invention

[0006] The purpose of this invention is to provide a high-efficiency capture device for low to medium concentrations of carbon dioxide, which solves the problem that existing capture devices are inconvenient to disassemble and assemble filter components during use, usually requiring repeated disassembly and reassembly of bolts and other fasteners, reducing the convenience of equipment maintenance and making it difficult to meet the needs of frequent experiments and equipment cleaning in laboratory settings.

[0007] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0008] The present invention is a high-efficiency capture device for medium and low concentration carbon dioxide, comprising a capture tank, wherein the capture tank is provided with a quick replacement part and a stirring part;

[0009] The quick-change unit includes a hollow block disposed above the collection tank. A cylindrical groove is formed inside the hollow block. A rectangular groove is formed on the outer wall of the cylindrical groove. A spring damper is fixedly connected to the top inner wall of the rectangular groove. A locking rod is fixedly connected to the bottom of the spring damper. The outer wall of the locking rod is slidably connected to the inner wall of the cylindrical groove. The locking rod is slidably connected to the hollow block. A trapezoidal groove is formed on the front side of the locking rod. The locking rod consists of a rectangular rod fixed to the bottom of a circular block. The circular block portion is slidably connected to the inner wall of the cylindrical groove.

[0010] Furthermore, a trapezoidal block is slidably connected to the inner wall of the rectangular groove, the outer wall of the trapezoidal block is in slidable contact with the inner wall of the trapezoidal groove, and a cylindrical rod is fixedly connected to the front side of the trapezoidal block, the cylindrical rod extending slidably out of the hollow block.

[0011] Furthermore, a rectangular groove 2 is provided on the hollow block, and a rectangular frame is provided on the inner wall of the rectangular groove 2. The outer wall of the rectangular frame is in sliding contact with the inner wall of the rectangular groove 2. The bottom of the clamping rod extends into the rectangular frame, and the outer wall of the clamping rod is in sliding contact with the inner wall of the rectangular frame. A filter plate is fixedly connected to the inner wall of the rectangular frame, and a handle is fixedly connected to the front side of the rectangular frame.

[0012] Furthermore, the stirring unit includes a motor fixedly connected to the bottom of the collection tank. The output shaft of the motor is fixedly connected to a rotating shaft via a coupling. The top of the rotating shaft extends rotatably into the collection tank. Two support frames are fixedly connected to the outer wall of the rotating shaft. Several stirring rods are fixedly connected between the two support frames. Several stirring rods are fixedly connected to the outer wall of the rotating shaft.

[0013] Furthermore, the top of the collection tank is connected to an inlet pipe, the top of the collection tank is connected to an outlet pipe, the top of the hollow block is connected to an air supply pipe, the bottom of the hollow block is connected to an inlet pipe, the bottom of the inlet pipe extends into the collection tank, the outer wall of the inlet pipe is fixedly connected to the collection tank, an aeration head is provided at the bottom of the inlet pipe, the bottom of the collection tank is connected to an outlet pipe, a temperature controller is installed on the outer wall of the collection tank, and a fixing frame is fixedly connected to the top of the collection tank, the inner wall of the fixing frame is fixedly connected to the hollow block.

[0014] Furthermore, the aeration head is a Hengge stainless steel aeration head. Its working principle is as follows: the core relies on the nano / micron level uniform microporous structure formed by high temperature and high pressure sintering of 316L stainless steel. When the process gas enters the aeration head cavity under pressure, it will be dispersed into a large number of small and uniform bubbles through these micropores. These bubbles rise slowly in the liquid, which greatly increases the gas-liquid contact area and contact time. This not only improves the gas dissolution efficiency in the liquid, but also enhances the gas-liquid mixing effect by precisely controlling the bubble state. At the same time, the microporous structure also has a gas filtration function, which can block impurities from entering the liquid and ensure the stable and continuous aeration process. It is suitable for various scenarios such as sewage treatment, biological fermentation, and dissolved gas preparation.

[0015] Furthermore, the temperature controller is the REX-C100 digital display intelligent fully automatic temperature controller. Its working principle is as follows: with a microcomputer chip as the core, it collects the real-time temperature (PV) of the controlled object through an adapted thermocouple or RTD, compares it with the target temperature (SV) set on the panel, and uses an intelligent self-tuning PID control algorithm (which can be combined with fuzzy control logic) to calculate the temperature deviation and automatically optimize the proportional, integral, and derivative parameters. Then, through relays, DC12V driving solid-state relays, or 4-20mA current output, it automatically adjusts the output power of the heating / cooling actuators. At the same time, it displays the PV and SV values ​​in real time and has dual-channel customizable alarm functions such as upper and lower limit deviations, realizing fast response, low overshoot, and precise constant temperature control without the need for repeated manual adjustments.

[0016] The present invention has the following beneficial effects:

[0017] This invention solves the core problems of cumbersome filter plate disassembly and assembly and easy seal failure in traditional low-concentration carbon dioxide capture devices by setting up a quick-change part, a hollow block, a spring damper, and a locking structure with a locking rod. The spring damper enables the locking rod to extend and retract quickly through elastic deformation, allowing for locking and unlocking of the filter plate without additional tools, eliminating the time-consuming disassembly and assembly of traditional bolt fixing. The damping characteristics of the spring damper also slow down the rebound speed of the locking rod, suppressing the impact force when it is locked into the rectangular frame, preventing wear and deformation of the locking rod or rectangular frame, and effectively extending the service life of the components. The inclined transmission structure of the trapezoidal block, cylindrical rod, and trapezoidal groove, and the inclined transmission design of the trapezoidal block and trapezoidal groove, endows... It offers convenient unlocking capabilities for quick replacement. Pressing the cylindrical rod drives the trapezoidal block to squeeze the inclined wall of the trapezoidal groove, converting the lateral thrust into the longitudinal lifting force of the locking rod. The operation is simple and labor-saving, and a single person can quickly complete the filter plate unlocking, adapting to the high-intensity work rhythm of industrial sites. It shortens the time spent on filter plate replacement and cleaning, ensuring continuous and stable collection operations. The filter plate is fixed in the rectangular frame, and when the hollow block is inserted, it can be aligned with the second rectangular groove, ensuring that the filter plate is always in the air intake path, filtering suspended impurities in the air source, and preventing impurities from entering the collection tank and clogging the aeration head or contaminating the amine liquid. The handle design allows operators to quickly pull the rectangular frame, further improving the efficiency of disassembly and assembly, and also allows for quick reinstallation after cleaning the filter plate, adapting to the frequent filter plate maintenance needs in industrial sites.

[0018] The present invention relates to a stirring unit with a three-dimensional stirring structure consisting of a motor, a rotating shaft, and a double-layer stirring rod. The motor drives the rotating shaft to synchronously rotate stirring rod one and stirring rod two, thus constructing a double-layer three-dimensional stirring mechanism. This mechanism cuts large-diameter bubbles into smaller bubbles, significantly increasing the contact area between the gas and the amine liquid. Simultaneously, it stirs the amine liquid, preventing stratification and ensuring uniform amine concentration. This allows medium- to low-concentration carbon dioxide gas to fully react with the amine liquid, greatly improving the absorption efficiency of carbon dioxide and preventing the gas from escaping before it has fully reacted, thus avoiding waste. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the front sectional structure.

[0021] Figure 2 This is a schematic diagram of a partial structure viewed from below;

[0022] Figure 3 This is a partial cross-sectional view of the quick-change section.

[0023] Figure 4 This is an exploded structural diagram of the quick-change unit;

[0024] Figure 5 This is a partial cross-sectional view of the stirring section.

[0025] Figure 6 This is a schematic diagram of the overall structure of the base.

[0026] The attached diagram lists the components represented by each number as follows:

[0027] In the diagram: 111, Collection tank; 112, Feed pipe; 113, Air outlet pipe; 1141, Air delivery pipe; 1142, Air inlet pipe; 115, Aeration head; 116, Discharge pipe; 117, Temperature controller; 118, Fixing frame; 2. Quick change unit; 211, Hollow block; 212, Cylindrical groove; 213, Rectangular groove one; 214, Spring damper; 215, Clamping rod; 216, Trapezoidal groove; 217, Trapezoidal block; 218, Cylindrical rod; 219, Rectangular groove two; 2110, Rectangular frame; 2111, Filter plate; 2112, Handle; 3. Stirring unit; 311, Motor; 312, Rotating shaft; 313, Support frame; 314, Stirring rod one; 315, Stirring rod two. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0029] Please see Figures 1-6 As shown, the present invention is a high-efficiency capture device for medium and low concentration carbon dioxide, including a capture tank 111, a quick replacement part 2 and a stirring part 3 provided on the capture tank 111, an inlet pipe 112 connected to the top of the capture tank 111, and an outlet pipe 113 connected to the top of the capture tank 111.

[0030] The quick-change unit 2 includes a hollow block 211 disposed above the collection tank 111. A cylindrical groove 212 is formed inside the hollow block 211. A rectangular groove 213 is formed on the outer wall of the cylindrical groove 212. A spring damper 214 is fixedly connected to the top inner wall of the rectangular groove 213. A locking rod 215 is fixedly connected to the bottom of the spring damper 214. The outer wall of the locking rod 215 is slidably connected to the inner wall of the cylindrical groove 212. The locking rod 215 is also slidably connected to the hollow block 211. A trapezoidal groove 216 is formed on the front side of the locking rod 215. The locking rod 215 consists of a circular block with a rectangular rod fixed to the bottom. The circular block portion is slidably connected to the inner wall of the cylindrical groove 212, and the inner wall of the rectangular groove 213 is slidably connected to the inner wall of the cylindrical groove 212. A trapezoidal block 217 is attached, and the outer wall of the trapezoidal block 217 slides in contact with the inner wall of the trapezoidal groove 216. A cylindrical rod 218 is fixedly connected to the front side of the trapezoidal block 217, and the cylindrical rod 218 slides out to the outside of the hollow block 211. A rectangular groove 219 is provided on the hollow block 211, and a rectangular frame 2110 is provided on the inner wall of the rectangular groove 219. The outer wall of the rectangular frame 2110 slides in contact with the inner wall of the rectangular groove 219. The bottom of the locking rod 215 extends into the rectangular frame 2110, and the outer wall of the locking rod 215 slides in contact with the inner wall of the rectangular frame 2110. A filter plate 2111 is fixedly connected to the inner wall of the rectangular frame 2110, and a handle 2112 is fixedly connected to the front side of the rectangular frame 2110.

[0031] By setting up the quick-change section 2, the problem of cumbersome disassembly and assembly of traditional filter components is solved. There is no need to repeatedly disassemble and assemble bolts and other fasteners, which greatly improves the convenience of equipment maintenance and meets the needs of frequent experiments and equipment cleaning in laboratory settings.

[0032] A gas supply pipe 1141 is connected to the top of the hollow block 211, and a gas inlet pipe 1142 is connected to the bottom of the hollow block 211. The bottom of the gas inlet pipe 1142 extends into the collection tank 111. The outer wall of the gas inlet pipe 1142 is fixedly connected to the collection tank 111. An aeration head 115 is provided at the bottom of the gas inlet pipe 1142. A discharge pipe 116 is connected to the bottom of the collection tank 111. A temperature controller 117 is installed on the outer wall of the collection tank 111. A fixing frame 118 is fixedly connected to the top of the collection tank 111. The inner wall of the fixing frame 118 is fixedly connected to the hollow block 211.

[0033] The stirring unit 3 includes a motor 311 fixedly connected to the bottom of the collection tank 111. The output shaft of the motor 311 is fixedly connected to a rotating shaft 312 via a coupling. The top of the rotating shaft 312 extends rotatably into the collection tank 111. Two support frames 313 are fixedly connected to the outer wall of the rotating shaft 312. Several stirring rods 314 are fixedly connected between the two support frames 313. Several stirring rods 315 are fixedly connected to the outer wall of the rotating shaft 312. By setting the stirring unit 3, the natural rising trajectory of bubbles in the liquid is broken, further increasing the gas-liquid contact area and contact time, strengthening the gas-liquid mixing effect, and improving the carbon dioxide capture efficiency.

[0034] It should be noted that the control of the temperature controller 117 and the motor 311 in this application can be achieved by using the program set in the control panel and inputting relevant parameters as needed for automatic control. This control method can be achieved using existing technologies, such as PLC. The collection tank 111 is equipped with heating and cooling elements that are compatible with the temperature controller 117.

[0035] The aeration head is a Hengge stainless steel aeration head. Its working principle is as follows: the core relies on the nano / micron level uniform microporous structure formed by high temperature and high pressure sintering of 316L stainless steel. When the process gas enters the aeration head cavity under pressure, it will be dispersed into a large number of small and uniform bubbles through these micropores. These bubbles rise slowly in the liquid, which greatly increases the gas-liquid contact area and contact time. This not only improves the gas dissolution efficiency in the liquid, but also enhances the gas-liquid mixing effect by precisely controlling the bubble state. At the same time, the microporous structure also has a gas filtration function, which can block impurities from entering the liquid and ensure a stable and continuous aeration process. It is suitable for various scenarios such as sewage treatment, biological fermentation, and dissolved gas preparation.

[0036] The temperature controller is the REX-C100 digital display intelligent fully automatic temperature controller. Its working principle is as follows: with a microcomputer chip as the core, it collects the real-time temperature (PV) of the controlled object through an adapted thermocouple or RTD, compares it with the target temperature (SV) set on the panel, and uses an intelligent self-tuning PID control algorithm (which can be combined with fuzzy control logic) to calculate the temperature deviation and automatically optimize the proportional, integral, and derivative parameters. Then, through relays, DC12V driving solid-state relays, or 4-20mA current output, it automatically adjusts the output power of the heating / cooling actuators. At the same time, it displays the PV and SV values ​​in real time and has dual-channel customizable alarm functions such as upper and lower limit deviations. It achieves accurate constant temperature control with fast response and low overshoot, without the need for repeated manual adjustments.

[0037] When in use, if the filter plate 2111 needs to be replaced or cleaned, press the cylindrical rod 218 to make it drive the trapezoidal block 217 to squeeze the inclined wall of the trapezoidal groove 216 on the clamping rod 215, causing the clamping rod 215 to move upward and compress the spring damper 214. After the bottom of the clamping rod 215 is separated from the rectangular frame 2110, pull out the rectangular frame 2110 and the filter plate 2111 through the handle 2112. After replacement or cleaning, reinsert the rectangular frame 2110 into the rectangular groove 219 of the hollow block 211, release the cylindrical rod 218, and the spring damper 214 will reset and drive the clamping rod 215 to move downward and lock into the rectangular frame 2110 to complete the fixation.

[0038] During collection, a preset amount of amine absorption medium is injected into the collection tank 111 through the feed pipe 112. The target temperature for the absorption stage, ranging from 30 to 40°C, is set by the temperature controller 117. The temperature controller 117 automatically collects the temperature inside the tank via thermocouples and adjusts the heating or cooling elements to maintain a stable temperature. After the device is started, a medium-to-low concentration carbon dioxide gas source is introduced into the hollow block 211 through the gas delivery pipe 1141. After a small amount of suspended particles are adsorbed and removed by the filter plate 2111, the gas is delivered to the aeration head 115 through the gas inlet pipe 1142. The aeration head 115 disperses the gas into fine bubbles and introduces them into the amine liquid. In the process, the motor 311 of the stirring unit 3 is started simultaneously. The motor 311 drives the rotating shaft 312 to rotate, which in turn drives the stirring rod 314 on the support frame 313 and the stirring rod 315 on the rotating shaft 312 to rotate synchronously, thereby enhancing the gas-liquid mixing effect. After the gas and amine liquid react fully, the unabsorbed purified gas is discharged from the gas outlet pipe 113. After the collection is completed, the gas source and motor 311 are turned off. After the amine liquid is saturated, the rich amine liquid is discharged through the discharge pipe 116 for subsequent desorption treatment, completing a single collection operation. Finally, the carbon dioxide in the saturated amine liquid is precipitated through the heating device.

Claims

1. A high-efficiency capture device for low to medium concentrations of carbon dioxide, comprising a capture tank (111), characterized in that, The collection tank (111) is equipped with a quick replacement part (2) and a stirring part (3). The quick-change unit (2) includes a hollow block (211) located above the collection tank (111). A cylindrical groove (212) is provided inside the hollow block (211). A rectangular groove (213) is provided on the outer wall of the cylindrical groove (212). A spring damper (214) is connected to the top inner wall of the rectangular groove (213). A locking rod (215) is connected to the bottom of the spring damper (214). The outer wall of the locking rod (215) is slidably connected to the inner wall of the cylindrical groove (212). The locking rod (215) is slidably connected to the hollow block (211). A trapezoidal groove (216) is provided on the front side of the locking rod (215).

2. The high-efficiency capture device for medium and low concentration carbon dioxide according to claim 1, characterized in that, A trapezoidal block (217) is slidably connected to the inner wall of the rectangular groove (213). The outer wall of the trapezoidal block (217) is in slidable contact with the inner wall of the trapezoidal groove (216). A cylindrical rod (218) is fixedly connected to the front side of the trapezoidal block (217). The cylindrical rod (218) extends slidably to the outside of the hollow block (211).

3. The high-efficiency capture device for medium and low concentration carbon dioxide according to claim 2, characterized in that, The hollow block (211) has a rectangular groove (219) on it. The inner wall of the rectangular groove (219) has a rectangular frame (2110). The outer wall of the rectangular frame (2110) is in sliding contact with the inner wall of the rectangular groove (219). The bottom of the clamping rod (215) extends into the rectangular frame (2110). The outer wall of the clamping rod (215) is in sliding contact with the inner wall of the rectangular frame (2110).

4. The high-efficiency capture device for medium and low concentration carbon dioxide according to claim 3, characterized in that, A filter plate (2111) is fixedly connected to the inner wall of the rectangular frame (2110), and a handle (2112) is fixedly connected to the front side of the rectangular frame (2110).

5. A high-efficiency capture device for medium and low concentration carbon dioxide according to claim 1, characterized in that, The stirring unit (3) includes a motor (311) fixedly connected to the bottom of the collection tank (111). The output shaft of the motor (311) is fixedly connected to a rotating shaft (312) via a coupling. The top of the rotating shaft (312) extends rotatably into the collection tank (111).

6. A high-efficiency capture device for medium and low concentration carbon dioxide according to claim 5, characterized in that, Two support frames (313) are fixedly connected to the outer wall of the rotating shaft (312), and several stirring rods (314) are fixedly connected between the two support frames (313). Several stirring rods (315) are fixedly connected to the outer wall of the rotating shaft (312).

7. The high-efficiency capture device for medium and low concentration carbon dioxide according to claim 1, characterized in that, The top of the collection tank (111) is connected to an inlet pipe (112), and the top of the collection tank (111) is connected to an outlet pipe (113).

8. A high-efficiency capture device for medium and low concentration carbon dioxide according to claim 7, characterized in that, The top of the hollow block (211) is connected to an air supply pipe (1141), and the bottom of the hollow block (211) is connected to an air inlet pipe (1142). The bottom of the air inlet pipe (1142) extends into the collection tank (111), and the outer wall of the air inlet pipe (1142) is fixedly connected to the collection tank (111). An aeration head (115) is provided at the bottom of the air inlet pipe (1142).

9. A high-efficiency capture device for medium and low concentration carbon dioxide according to claim 8, characterized in that, The bottom of the collection tank (111) is connected to a discharge pipe (116), and a temperature controller (117) is installed on the outer wall of the collection tank (111).

10. A high-efficiency capture device for medium- and low-concentration carbon dioxide according to claim 9, characterized in that, The top of the collection tank (111) is fixedly connected to a fixing frame (118), and the inner wall of the fixing frame (118) is fixedly connected to the hollow block (211).

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