Clean carbon dioxide recycling device

Abstract

The invention discloses a clean carbon dioxide recycling device which comprises a gas inlet main pipe, a gas inlet is formed in the opposite rear side of the gas inlet main pipe and used for being connected with an external pipeline to introduce tail gas, a communicating pipe is arranged on the opposite front side of the gas inlet main pipe to serve as a tail gas outlet, and a partition plate is installed on the opposite rear side of the gas inlet main pipe. The partition plate divides the air inlet main pipe into a front cavity and a rear cavity which are independent of each other, the cavity on the front side and the air inlet are located in the same space, and a processing base is arranged on the side edge of the air inlet main pipe. The device is designed to be detachable and replaceable, and is flexible and efficient in application. Secondly, the multiple treatment bases are arranged on the outer wall of the gas inlet main pipe, each treatment base communicates with the gas inlet main pipe through the corresponding communicating pipe, the treatment bases can be used only by improving the sealing rotating bases and rotating the sealing rotating bases to the communicating pipes at the corresponding positions, the other treatment bases can be replaced, tail gas treatment does not need to be stopped during replacement, and the cost is reduced. And the use efficiency is higher.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas treatment, in particular to a clean carbon dioxide recovery and utilization device. Background Art

[0002] Natural gas is currently widely used compared to coal and oil due to its high calorific value and low emissions. Its application scenarios and demand are gradually increasing. Natural gas trigeneration (CCHP) uses natural gas as the primary fuel to power natural gas power generation equipment, such as natural gas turbines or internal combustion engines, generating electricity to meet user electricity needs. The waste heat from the system is then used to provide heating and cooling to users through waste heat boilers or equipment such as lithium bromide. The main components of exhaust gas from natural gas generators include nitrogen, oxygen, carbon dioxide (CO2), water vapor (H2O), and harmful gases such as CO, HC, NMHC, NOx, and NH3. Carbon dioxide is a carbon resource widely used in industries such as petrochemicals, food, agriculture, forestry, and healthcare. Therefore, recycling and repurposing carbon dioxide is worth considering for environmental protection, business profitability, and resource utilization, turning waste into valuable resources.

[0003] In the existing technology, solid amine adsorbents can efficiently capture carbon dioxide, but solid amines can also adsorb trace amounts of harmful gases such as CO, HC, NMHC, NOx, and NH3 in exhaust gas. The presence of trace amounts of water vapor can inhibit the adsorption of the above gases to a certain extent, or reduce the adsorption capacity of the solid amine adsorbent for the above gases (for example, water vapor can form hydrogen bonds with amine groups, reducing the amine groups' adsorption capacity for nitrogen oxides, and the presence of water vapor will change the reaction mechanism between amine groups and carbon dioxide, promoting the adsorption of carbon dioxide while reducing the adsorption of nitrogen oxides).

[0004] However, the water vapor content in exhaust gas is usually high. Generally speaking, the water vapor content generated after natural gas combustion may account for about 10% to 20% of the exhaust gas volume (the specific value varies depending on the combustion efficiency and process design). According to research, a water vapor content of about 5% can maximize the adsorption of carbon dioxide, and excessive water vapor content will have a negative impact on the adsorption performance of solid amines. Secondly, it only takes 15 minutes for solid amine adsorbents to reach saturation adsorption at 50°C, while at 25°C, 80% relative humidity, and a CO2 concentration of 1.0%, polyacrylonitrile fiber-based solid amine (PAN-PEI) can adsorb up to 154.4g / kg within 30 minutes, of which the adsorption capacity reaches 127.1g / kg within the first 15 minutes, close to 80% of the saturated adsorption capacity. Therefore, the solid amine in the adsorption device needs to be replaced frequently, and the replacement process is cumbersome, which will lead to stagnation of use.

[0005] This case was created to solve the above problems. Summary of the Invention

[0006] (1) Technical problems solved

[0007] In view of the shortcomings of the existing technology, the present invention provides a clean carbon dioxide recovery and utilization device, which solves the problems raised in the above background technology.

[0008] (2) Technical solution

[0009] To achieve the above objectives, the present invention is implemented through the following technical solutions: a clean carbon dioxide recovery and utilization device, including an air intake main pipe, an air intake port is provided on the relative rear side of the air intake main pipe, which is used to connect an external pipeline to let in exhaust gas, a connecting pipe is provided on the relative front side of the air intake main pipe as an exhaust gas outlet, and a partition is installed on the relative rear side. The partition divides the air intake main pipe into two independent front and rear cavities, wherein the front cavity and the air intake port are in the same space, a processing seat is provided on the side of the air intake main pipe, a cavity is provided on the processing seat, an adsorption tube is movably placed in the cavity, the front end of the adsorption tube is connected with the connecting pipe, and the rear end is connected with the cavity on the rear side of the air intake main pipe.

[0010] As a preferred solution, further, the processing seat is designed to be in a rectangular parallelepiped shape and is arranged axially along the air inlet main pipe. The processing seat is made of copper or aluminum.

[0011] As a preferred solution, further, the cavity includes axially opened adjacent cavity one and cavity two, the relative front end of cavity one passes through to communicate with the connecting pipe, and the rear end passes through the processing seat, the rear end of cavity two passes through the processing seat, and the front end extends to the front end position of the processing seat, and the first adsorption tube and the second adsorption tube are respectively inserted into cavity one and cavity two. The front end of the first adsorption tube is inserted into the front end of cavity one and docked with the connecting pipe, and the rear end is sealed by sealing block one, and the front end and rear end of the second adsorption tube are respectively sealed by sealing block two and sealing block three.

[0012] As a preferred solution, further, the processing seat is provided with a guide groove 1 on the relative rear side, and the adjacent positions of the first adsorption tube and the second adsorption tube are respectively provided with an outlet groove 1 and an inlet groove which are fitted relative to the guide groove position and adapted in size, a guide groove 2 is provided on the front side of the opposite side of the processing groove, and an outlet groove 2 is provided corresponding to the fitting position on the relative front side of the second adsorption tube, the processing seat is provided with an air outlet channel close to the air inlet main pipe side, and a guide groove 3 which passes through the air inlet main pipe is provided on the relative rear side of the air outlet channel.

[0013] As a preferred embodiment, further, adsorbent and solid amine particles are placed in the first adsorption tube and the second adsorption tube respectively, or the front side of the first adsorption tube is treated with adsorbent and the back side is treated with solid amine particles, and the adsorbent is such as modified activated carbon or activated alumina.

[0014] As a preferred solution, further, the front end of the air intake main pipe is open and is designed to be pivotally connected to a sealing swivel seat, and a connecting port is provided on the sealing swivel seat, the size of which is adapted to the inner diameter of the connecting pipe.

[0015] As a preferred solution, further, a plurality of processing seats are arranged on the circumference of the air intake main pipe, and each processing seat is connected to the air intake main pipe through a corresponding connecting pipe.

[0016] As a preferred solution, further, magnets with different magnetic properties are respectively provided on the outer circle of the connecting port and the inner wall of the intake pipe seat located on the outer circle of the connecting pipe, and a mark corresponding to the connecting port is added to the outer side of the sealing rotating seat.

[0017] As a preferred solution, further, a pressure relief port is opened on one side of the sealing swivel seat, and is connected to a pressure relief pipe to the outside, and the pressure relief pipe can be used to connect to an external air pump.

[0018] As a preferred solution, further, the inner sides of sealing block three and sealing block one are respectively connected to spring one, and piston block two and piston block one are respectively connected to the inner ends of the corresponding springs. Under normal circumstances, piston block two is located on the relative inner side of groove two, and piston block one is located on the relative inner side of groove one.

[0019] The design concept of this solution is to first use an adsorbent to perform a preliminary, relatively small amount of water vapor adsorption in the exhaust gas, thereby slightly reducing the water vapor content in the gas and minimizing its impact on subsequent carbon dioxide adsorption. Secondly, given the excellent cyclic stability of solid amine particles for carbon dioxide adsorption and desorption, as well as the regenerative and reusable nature of the adsorbent, the container that utilizes both was redesigned and can be quickly disassembled and replaced.

[0020] Solid amine particles exhibit good cyclic stability for carbon dioxide adsorption-desorption regeneration, with performance degradation of only 0.5% per cycle. The solid amine particles can be desorbed and reused (using conventional methods such as temperature swing desorption (TSA), pressure swing desorption (PSA), catalytic desorption, etc.).

[0021] Adsorbents such as modified activated carbon and activated alumina can be used to absorb water vapor from gases. These adsorbents can remove water vapor through physical or chemical adsorption and can be regenerated and reused. For example, activated alumina effectively adsorbs water vapor and has a simple regeneration process, making it suitable for industrial gas treatment. However, molecular sieves, which readily adsorb carbon dioxide, should not be used.

[0022] (3) Beneficial effects

[0023] After adopting the above-mentioned technical solution, the clean carbon dioxide recovery and utilization device provided by the present invention has the following advantages compared to the existing technology: Given the high efficiency of solid amine particles in capturing carbon dioxide, and the regenerative and reusable properties shared by the water vapor adsorbent used, the device is designed to be removable and replaceable, allowing for flexible and efficient use. Secondly, multiple treatment seats are provided on the outer wall of the intake main pipe, each of which is connected to the intake main pipe via a corresponding connecting pipe. The use of the treatment seat can be realized by simply improving the sealing rotating seat and rotating it to the connecting pipe at the corresponding position. The remaining treatment seats can be replaced without stopping the exhaust gas treatment during replacement, which improves the efficiency of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the present invention;

[0025] Figure 2 This is a disassembly diagram of the present invention;

[0026] Figure 3 This is a schematic cross-sectional view of the processing seat of the present invention;

[0027] Figure 4 This is a schematic diagram of the disassembly of the adsorption tube of the present invention;

[0028] Figure 5 This is a schematic diagram of the support frame of the present invention;

[0029] Figure 6 This is a preliminary improved schematic diagram of the present invention;

[0030] Figure 7 This is a schematic diagram of the sealing swivel of the present invention;

[0031] Figure 8 This is a schematic diagram after improvement of the present invention;

[0032] Figure 9 This is a schematic diagram of the improved sealing swivel seat of the present invention;

[0033] Figure 10 This is a schematic diagram of the disassembly of the improved adsorption tube of the present invention.

[0034] In the figure, 1. air inlet main pipe; 2. air inlet port; 3. air outlet port; 4. sealing swivel seat; 41. connecting port; 42. pressure relief pipe; 43. pressure relief port; 5. connecting pipe; 6. processing seat; 61. cavity slot one; 62. cavity slot two; 63. air outlet channel; 64. guide slot three; 65. guide slot one; 66. guide slot two; 7. clamping plate; 8. first adsorption tube; 81. sealing block one; 82. outlet slot one; 83. spring one; 84. piston block one; 9. second adsorption tube; 91. sealing block two; 92. inlet slot; 93. sealing block three; 94. spring two; 95. piston block two; 96. outlet slot two; 10. partition; 11. support frame; 12. accommodating area. DETAILED DESCRIPTION

[0035] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0036] Example 1, as Figure 1 As shown, a clean carbon dioxide recovery and utilization device includes an intake main pipe 1 with an air inlet 2 on its rear side for connecting to an external pipeline to admit exhaust gas and capture and recover carbon dioxide. A connecting pipe 5 is provided on the front side of the intake main pipe 1 as an exhaust gas outlet. A partition 10 is installed on the rear side of the intake main pipe 1 to separate the intake main pipe 1 into two independent chambers. The front chamber and the air inlet 2 are located in the same space, while the rear chamber is used to discharge the exhaust gas after adsorption treatment.

[0037] It is best to set a filter screen near the connecting pipe 5 on the air intake main pipe 1 to filter out dust and particles in the exhaust gas.

[0038] A processing seat 6 is fixedly installed on the side of the air intake main pipe 1 by bonding, welding, etc. The processing seat 6 is designed to be a rectangular parallelepiped and is arranged axially along the air intake main pipe 1. The processing seat 6 is made of a material with good thermal conductivity such as copper or aluminum, which can continuously conduct heat to the processing seat 6 when the exhaust gas with residual temperature is introduced.

[0039] As attached Figure 2-4 As shown, the processing base 6 is axially provided with adjacent cavities 1 61 and 2 62. The front end of cavity 1 61 extends through the connection pipe 5, and the rear end extends through the processing base 6. The rear end of cavity 2 62 extends through the processing base 6, and the front end extends to the front end position of the processing base 6 (not through). Correspondingly, the first adsorption tube 8 and the second adsorption tube 9 are movably inserted into cavity 1 61 and cavity 2 62 of the processing base 6, respectively. The front end of the first adsorption tube 8 is inserted into the front end of cavity 1 61 and docked with the connection pipe 5, and the rear end is sealed by sealing block 1 81. The front end and rear end of the second adsorption tube 9 are sealed by sealing block 2 91 and sealing block 3 93, respectively.

[0040] The treatment seat 6 has a guide groove 1 65 on the rear side thereof. The adjacent positions of the first adsorption tube 8 and the second adsorption tube 9 respectively have outlet groove 1 82 and inlet groove 92, which align with and are sized to match the guide grooves. A guide groove 2 66 is provided on the front side of the treatment seat, and an outlet groove 2 96 is provided at the corresponding location on the front side of the second adsorption tube 9. An outlet channel 63 is provided on the treatment seat 6, immediately adjacent to the intake main pipe 1. A guide groove 3 64, extending from the rear side thereof to the intake main pipe 1, is provided. This allows exhaust gas to pass through the connecting pipe 5, the first adsorption tube 8, and then the guide groove 1 65 into the second adsorption tube 9, where it is discharged through the outlet channel 63 to the rear side of the intake main pipe 1.

[0041] In practice, adsorbent and solid amine particles can be placed in the first adsorption tube 8 and the second adsorption tube 9, respectively. After the first adsorption tube 8 initially adsorbs water vapor to reduce the water vapor content in the exhaust gas, the exhaust gas then enters the second adsorption tube 9 for efficient adsorption of carbon dioxide. Alternatively, adsorbent can be placed on the front side of the first adsorption tube 8, while solid amine particles can be placed on the back side to further adsorb carbon dioxide from the exhaust gas.

[0042] The adsorbent can be placed in a support frame 11 adapted to the inner diameter of the first adsorption tube 8, see the attached Figure 5 As shown, the support frame 11 is breathable, and the internal circumference is divided into multiple small accommodating areas 12, so that the exhaust gas can be fully contacted and adsorbed when passing through. The exhaust gas has a certain flow rate, and generally water vapor will not be completely adsorbed, thereby effectively reducing the water vapor content.

[0043] Adsorbents such as modified activated carbon and activated alumina can be used.

[0044] Furthermore, in order to facilitate the removal and disassembly of the first adsorption tube 8 and the second adsorption tube 9, arc-shaped grooves can be provided at the sealing block 1 81 and the sealing block 2 91 located at the relatively rear ends to facilitate the fingers to buckle in and out for use.

[0045] Secondly, a clamping plate 7 is inserted into the rear end of the processing base 6, which not only clamps the first adsorption tube 8 and the second adsorption tube 9, but also seals the cavity within the processing base 6. Specifically, a clamping block extends from the front side of the clamping plate 7, and a slot of appropriate size is provided on the upper side of the processing base 6. The clamping block can be inserted from top to bottom to secure the clamping plate 7 to the rear end of the processing base 6.

[0046] Example 2, see attached Figure 6-8As shown, the front end of the intake main pipe 1 has been improved. Specifically, the front end of the intake main pipe 1 is open and pivotally connected to a sealing rotatable seat 4. This sealing rotatable seat 4 has a communication port 41 formed therein, the size of which matches the inner diameter of the connecting pipe 5. Furthermore, multiple processing seats 6 can be arranged circumferentially around the intake main pipe 1, each of which is connected to the intake main pipe 1 via a corresponding connecting pipe 5. Therefore, the sealing rotatable seat 4 only needs to be rotated to the corresponding connecting pipe 5 to activate the processing seat 6. The remaining processing seats 6 can be replaced without stopping exhaust gas processing during replacement, which improves efficiency.

[0047] This embodiment shows an example of three processing seats 6. Of course, two or more processing seats 6 can also be used. Secondly, two adjacent communication ports 41 on the sealing rotating seat 4 can also be opened, so that the two adjacent processing seats 6 can process the exhaust gas at the same time.

[0048] If necessary, it is best to add markings to the outside of the sealing swivel seat 4 to visually identify the position of the connecting port 41 after rotation. Secondly, magnets with different magnetic properties can be placed around the outer periphery of the connecting port 41 and around the inner wall of the intake pipe seat, located around the outer periphery of the connecting pipe 5. This allows for a certain sense of tactile feedback when the corresponding positions are rotated and docked, and provides a certain degree of attraction and tightening to prevent rotation.

[0049] In the third embodiment, after the multiple processing seats 6 are switched in the second embodiment, tail gas is retained in the first adsorption tube 8 and the second adsorption tube 9 in the original processing seat 6 after each replacement. Therefore, the sealing rotating seat 4 is further improved, as shown in the attached Figure 9 As shown, a pressure relief port 43 is opened on one side of the sealing rotary seat 4, and is connected to a pressure relief pipe 42 to the outside. The pressure relief pipe 42 can be used to connect to an external air pump (the air pump can pump in a stable gas such as nitrogen), so that when the processing seat 6 is switched for use, the pressure relief port 43 is aligned with its corresponding connecting pipe 5 by rotating the sealing rotary seat 4 and the tail gas remaining in the first adsorption tube 8 and the second adsorption tube 9 is discharged by discharging air.

[0050] Secondly, since the ends of the first adsorption tube 8 and the second adsorption tube 9 are provided with an outlet groove 82, an outlet groove 96 and an inlet groove 92, the exhaust gas is easily entered for the second time. Therefore, this embodiment optimizes the design of the first adsorption tube 8 and the second adsorption tube 9. Figure 10 As shown, springs and spring 1 83 are connected to the inner sides of sealing block 3 93 and sealing block 1 81 respectively, and piston block 2 95 and piston block 1 84 are connected to the inner ends of the corresponding springs respectively. Under normal circumstances, piston block 2 95 is located on the opposite inner side of groove 2 96, and piston block 1 84 is located on the opposite inner side of groove 1 82 to achieve sealing. Secondly, gas exchange with the outside world can be reduced during disassembly and replacement (the open end of the first adsorption tube 8 still needs to be sealed in time when disassembled).

[0051] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A clean carbon dioxide recovery and utilization device, comprising an air intake main pipe, an air inlet opening formed on the opposite rear side thereof for connecting to an external pipeline for admitting exhaust gas, a connecting pipe provided on the opposite front side of the air intake main pipe as an exhaust gas outlet, and a partition installed on the opposite rear side thereof, the partition dividing the air intake main pipe into two independent front and rear chambers, wherein the front chamber and the air inlet opening are located in the same space, characterized in that: A processing seat is provided on the side of the air intake main pipe, and a cavity is opened on the processing seat. An adsorption tube is movably placed in the cavity. The front end of the adsorption tube is connected to the connecting pipe, and the rear end is connected to the cavity on the rear side of the air intake main pipe.

2. The clean carbon dioxide recovery and utilization device according to claim 1, characterized in that: The processing seat is designed to be in the shape of a cuboid and is arranged axially along the air inlet main pipe. The processing seat is made of copper or aluminum.

3. The clean carbon dioxide recovery and utilization device according to claim 1, characterized in that: The cavity includes cavity one and cavity two that are axially opened and adjacent to each other. The relative front end of cavity one passes through to communicate with the connecting pipe, and the rear end passes through the processing seat. The rear end of cavity two passes through the processing seat, and the front end extends to the front end position of the processing seat. The first adsorption tube and the second adsorption tube are respectively inserted into cavity one and cavity two. The front end of the first adsorption tube is inserted into the front end of cavity one and docked with the connecting pipe, and the rear end is sealed by sealing block one. The front end and rear end of the second adsorption tube are respectively sealed by sealing block two and sealing block three.

4. The clean carbon dioxide recovery and utilization device according to claim 3, characterized in that: The processing seat is provided with a guide groove 1 on the relative rear side, and the adjacent positions of the first adsorption tube and the second adsorption tube are respectively provided with an outlet groove 1 and an inlet groove which are fitted relative to the guide groove position and adapted in size. A guide groove 2 is provided on the front side of the opposite side of the processing groove, and an outlet groove 2 is provided corresponding to the fitting position on the relative front side of the second adsorption tube. The processing seat is provided with an air outlet channel close to the air inlet main pipe, and a guide groove 3 which runs through the air inlet main pipe is provided on the relative rear side of the air outlet channel.

5. A clean carbon dioxide recovery and utilization device according to any one of claims 4-5, characterized in that: Adsorbent and solid amine particles are placed in the first adsorption tube and the second adsorption tube respectively, or the front side of the first adsorption tube is treated with adsorbent and the back side is treated with solid amine particles. The adsorbent is, for example, modified activated carbon or activated alumina.

6. The clean carbon dioxide recovery and utilization device according to claim 1, characterized in that: The front end of the air inlet main pipe is open and is designed to be pivotally connected to a sealing swivel seat. The sealing swivel seat is provided with a communication port, the size of which is adapted to the inner diameter of the communication pipe.

7. The clean carbon dioxide recovery and utilization device according to claim 6, characterized in that: A plurality of processing seats are arranged on the upper circumference of the air intake main pipe, and each processing seat is connected to the air intake main pipe through a corresponding connecting pipe.

8. The clean carbon dioxide recovery and utilization device according to claim 7, characterized in that: Magnets with different magnetic properties are respectively arranged on the outer circle of the communicating port and the inner wall of the intake pipe seat located on the outer circle of the communicating pipe, and a mark corresponding to the communicating port is added to the outer side of the sealing rotating seat.

9. A clean carbon dioxide recovery and utilization device according to any one of claims 6 to 9, characterized in that: A pressure relief port is provided on one side of the sealing swivel seat and is connected to a pressure relief pipe to the outside. The pressure relief pipe can be used to connect to an external air pump.

10. The clean carbon dioxide recovery and utilization device according to claim 9, characterized in that: The inner sides of the sealing block three and the sealing block one are respectively connected to the spring and the spring one, and the inner ends of the corresponding springs are respectively connected to a piston block two and a piston block one. Under normal circumstances, the piston block two is located on the relative inner side of the groove two, and the piston block one is located on the relative inner side of the groove one.

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