Replaceable carbon dioxide adsorption filter element and trapping and recycling system thereof

Abstract

The utility model relates to the field of gas adsorption, in particular to the technical field of carbon dioxide adsorption. A replaceable carbon dioxide adsorption filter element comprises a filter element body, and the filter element body comprises a shell serving as a filter element shell. An air inlet is formed in one end of the filter element shell, the other end of the filter element shell is closed, and the shell on one side of the air inlet is turned outwards to form a turned edge; at least two through grooves penetrating inside and outside are formed in the side wall of the filter element shell; a core material made of a carbon dioxide adsorption material is filled in the filter element shell; the filter element further comprises an annular plate which is detachably connected to the inner wall of the air inlet, and the core material is fixed in the filter element shell.

Description

Technical Field

[0001] The utility model relates to the field of gas adsorption, in particular to the technical field of carbon dioxide adsorption. Background Art

[0002] The main components of flue gas include nitrogen, carbon dioxide, oxygen and water vapor, as well as a small amount of sulfide. In coal-fired power plants, the exhaust gas temperature is generally around 170 to 200 degrees. In some industrial applications, the flue gas temperature may be higher.

[0003] In recent years, solid amine materials, as a new type of carbon dioxide adsorbent, have become a research hotspot in the fields of carbon dioxide adsorption removal and industrial decarbonization due to their advantages such as high selectivity, good adsorption performance and low corrosion to equipment in the capture and separation of carbon dioxide. However, flue gas contains a large amount of harmful substances such as fly ash, sulfur dioxide and nitrogen oxides. These substances adhere to the solid amine resin, reducing the solid amine resin's ability to adsorb carbon dioxide. Therefore, the solid amine resin needs to be restored to its adsorption capacity through alkaline washing after a period of use. This results in the need to suspend the adsorption process during the solid amine alkaline washing, which reduces work efficiency. A cleaning spray device must also be added to the adsorption device, increasing the manufacturing cost of the adsorption device. Utility Model Content

[0004] The purpose of the present utility model is to provide a replaceable carbon dioxide adsorption filter element to solve at least one of the above technical problems.

[0005] The technical problem solved by the present invention can be achieved by adopting the following technical solutions:

[0006] The replaceable carbon dioxide adsorption filter element includes a filter element, and the filter element includes a shell as a filter element shell;

[0007] One end of the filter element shell is provided with an air inlet, and the other end is closed, and the shell on the air inlet side is turned outward to form a flange;

[0008] The side wall of the filter element housing is provided with at least two through grooves running through the inside and outside;

[0009] The filter shell is filled with a core material made of carbon dioxide adsorption material;

[0010] It also includes an annular plate, which is detachably connected to the inner wall of the air inlet to fix the core material in the filter core shell.

[0011] In the above design, the core material contains a material that can absorb carbon dioxide in the air, and the mixed material is bonded by an adhesive material. There are pores in the mixed material, and air can pass through the pores. In the process of passing through, carbon dioxide is adsorbed.

[0012] In this design, the filter element includes a filter housing with air intake at one end and a closed end. This advantageously allows air to enter the filter housing through the air intake. Because the closed end forces air to flow to both sides, through the interior of the core material, and out through the slots on both sides of the filter housing. This structure forces air to flow through the interior of the core material, thereby enhancing the carbon dioxide adsorption efficiency of the carbon dioxide adsorbent.

[0013] In the above design, the function of the annular plate is to fix the core material in the filter element housing. The annular plate has a central hole, so it will not affect the air entering the filter element housing.

[0014] Furthermore, the carbon dioxide adsorbent material is a porous material formed by mixing the adhesive material and the carbon dioxide adsorbent material, and the porous material allows air circulation;

[0015] The bonding material is one or more of polypropylene, polyethylene and rubber;

[0016] The diameter of the bonding material is 0.2 to 0.45 mm;

[0017] The carbon dioxide adsorption material is one or more of a cross-linked primary amine resin and a polyethyleneimine resin;

[0018] The carbon dioxide adsorption material is in the form of granules or powders or in combination thereof;

[0019] The diameter of the carbon dioxide adsorbent material is 0.2 to 1.2 mm.

[0020] In the above design, the core material contains a large amount of carbon dioxide adsorbent material, and the adhesive material and the carbon dioxide adsorbent material are uniformly mixed and adhered to each other into a whole.

[0021] The bonding material is made of one or more of polypropylene, polyethylene, and rubber. These materials have the characteristic of softening when heated, and can bond the carbon dioxide adsorbent materials together in the softened state.

[0022] The carbon dioxide adsorbent material uses a cross-linked primary amine resin or polyethyleneimine resin. These two materials are new carbon dioxide ion exchange resins with the ability to adsorb carbon dioxide gas in recent years. For example, one cubic meter of cross-linked primary amine resin can adsorb 29 kg of carbon dioxide. Cross-linked primary amine resin or polyethyleneimine resin can be in granular or powder form, with a large surface area, which is conducive to the adsorption of carbon dioxide gas. When the carbon dioxide adsorbent material is in powder form, the resulting mixed material has low porosity, while when the carbon dioxide adsorbent material is in granular form, the resulting mixed material has high porosity.

[0023] Furthermore, the core material adopts one of a cylindrical shape and a radial shape.

[0024] In the above design, the core material adopts either a cylindrical or radial shape. The advantages of these shapes are: first, the cylindrical and radial shapes are simple and easy to manufacture. Second, these two core shapes are easy to place within the filter housing. Finally, the cylindrical and radial core materials allow air to easily pass through the filter element. The radial filter element, in particular, has a larger surface area and more efficient carbon dioxide adsorption capacity.

[0025] Furthermore, the core material has a through hole in the middle; the central hole of the annular plate is larger than the through hole of the core material.

[0026] In the above design, there is a through hole in the middle of the core material. The air first enters the through hole, then passes through the core material on both sides, and finally flows out from the outer wall of the filter shell. During this process, the carbon dioxide in the air is adsorbed by the carbon dioxide adsorption material in the core material.

[0027] The central hole of the annular plate is larger than the through hole of the core material, which has the beneficial effect of not hindering air from entering the through hole.

[0028] Furthermore, the annular plate is connected to the inner wall of the air inlet by means of threads.

[0029] In the above design, the side wall of the annular plate is provided with an external thread, and the inner wall of the air inlet is provided with an internal thread. The annular plate is connected by the thread for disassembly. The beneficial effect is that the structure is simple, the connection is reliable, and the manufacturing cost can be reduced.

[0030] Furthermore, three, four, five or seven filter elements are allowed to be arranged in the filter element housing.

[0031] In the above design, multiple filter elements are arranged in the filter element housing, which has the beneficial effect of increasing the adsorption capacity of carbon dioxide and making the adsorption more efficient.

[0032] Furthermore, a carbon dioxide capture and recovery system having a replaceable carbon dioxide adsorption filter element uses a replaceable carbon dioxide adsorption filter element, comprising a filter element, the filter element including a shell as a filter element shell;

[0033] One end of the filter element shell is provided with an air inlet, and the other end is closed, and the shell on the air inlet side is turned outward to form a flange;

[0034] The side wall of the filter element housing is provided with at least two through grooves running through the inside and outside;

[0035] The filter shell is filled with a core material made of carbon dioxide adsorption material, and the middle of the core material has a through hole;

[0036] It also includes an annular plate that is detachably connected to the inner wall of the air inlet to fix the core material in the filter shell;

[0037] The central hole of the annular plate is larger than the through hole of the core material;

[0038] It also includes a pipeline for transporting flue gas and a carbon dioxide capture and recovery system connected to the pipeline;

[0039] The carbon dioxide capture and recovery system includes an airtight shell serving as an exchange chamber, the exchange chamber being provided with a smoke inlet and a smoke outlet, the smoke inlet being provided with a valve, and the smoke outlet being provided with a valve;

[0040] The filter element is detachably connected to the smoke inlet through a flange, and the filter element extends into the exchange chamber;

[0041] A heat exchange pipe is provided between the outer wall of the filter cartridge shell and the inner wall of the exchange chamber. The heat exchange pipe is arranged around the outer wall of the filter cartridge shell, and the two ends of the heat exchange pipe pass through the shell of the exchange chamber respectively, forming two interfaces on the outer wall of the exchange chamber;

[0042] One of the interfaces is connected to a pipeline for conveying flue gas through an air pump, and the other interface is connected to the atmosphere;

[0043] It also includes a compressor, the air extraction port of the compressor is connected to the exchange chamber;

[0044] The exhaust port of the compressor is connected to an air storage tank.

[0045] In the above design, the exchange chamber has a smoke inlet and a smoke outlet. The filter element is detachably connected to the smoke inlet of the exchange chamber through a flange. The filter element extends into the exchange chamber. The smoke inlet and smoke outlet are respectively equipped with valves. The carbon dioxide capture and recovery system captures and recovers carbon dioxide from the air in two stages:

[0046] The first stage is the adsorption stage. At this time, the valves at the smoke inlet and outlet are opened, and air flows through the core material in the filter element, and the cross-linked primary amine resin or polyethyleneimine resin in the core material is adsorbed;

[0047] The second stage is the desorption stage. At this time, the valves at the smoke inlet and outlet are closed, the exchange chamber is in a closed state, and the heat exchange pipe introduces high-temperature flue gas to increase the temperature in the exchange chamber. The cross-linked primary amine resin or polyethyleneimine resin in the core material desorbs carbon dioxide, and the compressor compresses the desorbed carbon dioxide into the gas tank.

[0048] For further optimization, the flange of the filter element housing is snap-connected to the smoke inlet.

[0049] In the above design, the smoke inlet is provided with an elastic protrusion, and the flange of the filter shell can be snapped into the protrusion to form a detachable snap-fit ​​structure. The detachable connection adopts a snap-fit ​​structure, which has the beneficial effect of quick disassembly and high installation and removal efficiency.

[0050] Furthermore, it also includes a temperature control system for controlling the temperature of the flue gas using a heat exchanger, the temperature control system including a temperature sensor system and a water pump;

[0051] It also includes a cooling water circulation system, which includes a water outlet and a water return outlet;

[0052] The heat source inlet of the heat exchanger is connected to the pipeline for conveying flue gas, and the heat source outlet of the heat exchanger is connected to the flue gas inlet;

[0053] The water outlet is connected to the cold source inlet of the heat exchanger through a water pump, and the cold source outlet of the heat exchanger is connected to the return water outlet;

[0054] The detection head of the temperature sensor system is set at the heat source outlet of the heat exchanger, and the control output interface of the temperature sensor system controls the water flow rate of the water pump;

[0055] The temperature of the flue gas output from the heat source outlet of the heat exchanger is between 70 and 80°C.

[0056] In the above design, a temperature control system is set between the flue gas conveying pipeline and the exchange chamber. The temperature control system uses a heat exchanger as a heat exchange and temperature control device. The temperature sensor system measures and controls the water flow of the water pump to control the flue gas temperature, so that the flue gas temperature after heat exchange and cooling by the heat exchanger can be maintained in the temperature range required for the high adsorption rate of the carbon dioxide adsorption material.

[0057] After many experiments, it was shown that the adsorption capacity of cross-linked primary amine resin or polyethyleneimine resin was 3.85 mmol / g at an adsorption temperature of 55°C, and the adsorption capacity could be as high as 4.70 mmol / g at an adsorption temperature of 75°C. It dropped to 3.52 mmol / g at an adsorption temperature of 95°C, and when the adsorption temperature was further increased to 115°C, the adsorption rate was further reduced to 2.47 mmol / g.

[0058] The adsorption rate data from multiple experiments can be summarized as follows: the optimal temperature range for the adsorption rate of cross-linked primary amine resin or polyethyleneimine resin is 75℃±5℃.

[0059] Furthermore, the heat exchanger adopts a shell and tube flue gas heat exchanger.

[0060] In the above design, the heat exchanger is used to cool the flue gas so that the temperature of the flue gas is reduced to a temperature that is suitable for the adsorption rate of carbon dioxide by the cross-linked primary amine resin or polyethyleneimine resin to be at a higher level.

[0061] Shell and tube flue gas heat exchangers are suitable for heat exchange between different media, such as flue gas-flue gas, flue gas-steam, flue gas-circulating water, etc. This type of heat exchanger has strong pressure bearing capacity, simple and durable structure. The shell and tube flue gas heat exchanger has the beneficial effect of low cost and can save construction costs.

[0062] The beneficial effect of the present invention is that the material used for adsorption and desorption of carbon dioxide in the air is designed as a replaceable filter element structure, and the filter element structure is detachably arranged in the exchange chamber. After the adsorption efficiency of the filter element decreases, the filter element can be taken out and replaced with a new one, thereby shortening the downtime of the carbon dioxide capture and recovery system and improving the capture and recovery efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. 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 inventive work. Among them:

[0064] Figure 1 It is the front view of the filter housing;

[0065] Figure 2 It is the right side view of the filter housing;

[0066] Figure 3 Schematic diagram of a porous structured mixed material

[0067] Figure 4 It is a schematic diagram of a cylindrical filter element;

[0068] Figure 5 It is a schematic diagram of a radial filter element;

[0069] Figure 6 It is a schematic diagram of placing multiple filter elements in the filter element housing;

[0070] Figure 7 It is a schematic diagram of a carbon dioxide capture and recovery system using a replaceable carbon dioxide adsorption filter element.

[0071] Explanation of symbols:

[0072] 1. Filter element shell; 2. Ring plate; 3. Filter element; 4. Exchange chamber; 5. Heat exchange tube; 6. Valve; 7. Heat exchanger; 8. Water pump; 9. Temperature sensor system; 10. Air pump; 11. Through groove; 12. Flanged edge; 30. Through hole; 31. Radial outer wall; 35. Carbon dioxide adsorption material; 36. Adhesive material; 37. Pores. DETAILED DESCRIPTION

[0073] In order to make the above-mentioned objects, features and advantages of the present invention more understandable, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0074] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0075] Next, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, cross-sectional views of device structures may be partially enlarged and not to scale when describing embodiments of the present invention. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, three-dimensional dimensions, including length, width, and depth, should be included.

[0076] Furthermore, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it designate a separate or selective embodiment that is mutually exclusive with other embodiments.

[0077] Reference Figure 1 、 Figure 2 As shown, the replaceable carbon dioxide adsorption filter element 3 includes a filter element 3, and the filter element 3 includes a shell as a filter element shell 1;

[0078] The filter element housing 1 is provided with an air inlet at one end and is closed at the other end. The housing on the air inlet side is turned outward to form a flange 12;

[0079] The side wall of the filter element housing 1 is provided with at least two through grooves 11 extending inside and outside.

[0080] The filter element housing 1 is filled with a core material made of carbon dioxide adsorbent material 35;

[0081] It also includes an annular plate 2 which is detachably connected to the inner wall of the air inlet to fix the core material in the filter cartridge housing 1 .

[0082] In the above design, the core material contains a material that can absorb carbon dioxide in the air, and the mixed material is bonded by the adhesive material 36. There are pores 37 in the mixed material, and air can pass through the pores 37. In the process of passing through, carbon dioxide is adsorbed.

[0083] In the above design, the filter element 3 includes a filter housing 1, which has an air intake at one end and is sealed at the other. This advantageously allows air to enter the filter housing 1 through the air intake. Because the other end is sealed, the air is forced to flow to both sides, passing through the interior of the core material, and ultimately out through the through-slots 11 on both sides of the filter housing 1. This structure forces the air to pass through the interior of the core material, thereby enhancing the carbon dioxide adsorption efficiency of the carbon dioxide adsorbent 35.

[0084] In the above design, the function of the annular plate 2 is to fix the core material in the filter element housing 1. The annular plate 2 has a central hole, so it will not affect the air entering the filter element housing 1.

[0085] Reference Figure 3 As shown, the carbon dioxide adsorbent material 35 is a porous structure material formed by mixing the adhesive material 36 and the carbon dioxide adsorbent material 35, and the porous structure material allows air to flow;

[0086] The adhesive material 36 is made of one or more of polypropylene, polyethylene, and rubber;

[0087] The diameter of the adhesive material 36 is 0.2 to 0.45 mm;

[0088] The carbon dioxide adsorbent material 35 is one or more of a cross-linked primary amine resin and a polyethyleneimine resin;

[0089] The carbon dioxide adsorbent material 35 is in the form of granules or powders or in combination thereof;

[0090] The diameter of the carbon dioxide adsorbent 35 is 0.2 to 1.2 mm.

[0091] In the above design, the core material contains a large amount of carbon dioxide adsorbent material 35 , and the adhesive material 36 and the carbon dioxide adsorbent material 35 are uniformly mixed and adhered to each other to form a whole.

[0092] The bonding material 36 is made of one or more of polypropylene, polyethylene, and rubber. These materials soften when heated and can bond the carbon dioxide adsorbent material 35 together in the softened state.

[0093] The carbon dioxide adsorbent 35 utilizes a cross-linked primary amine resin or polyethyleneimine resin. These two materials are new carbon dioxide ion exchange resins with the ability to adsorb carbon dioxide gas in recent years. For example, one cubic meter of cross-linked primary amine resin can adsorb 29 kg of carbon dioxide. These cross-linked primary amine resins or polyethyleneimine resins can be in granular or powder form, providing a large surface area that facilitates carbon dioxide adsorption. When the carbon dioxide adsorbent 35 is in powder form, the resulting mixed material has a low porosity. When the carbon dioxide adsorbent 35 is in granular form, the resulting mixed material has a high porosity.

[0094] Reference Figure 4 、 Figure 5 As shown, the core material adopts one of cylindrical and radial shapes.

[0095] In the above design, the core material adopts either a cylindrical or radial shape. The advantages of these shapes are: first, the cylindrical or radial shapes are simple and easy to manufacture. Second, these core materials are easy to place within the filter housing 1. Finally, the cylindrical or radial core material allows air to easily pass through the interior of the filter element 3. In particular, the radial filter element 3 has a larger surface area due to its radial outer wall 31, resulting in more efficient carbon dioxide adsorption.

[0096] Reference Figure 4 、 Figure 5 As shown, the core material has a through hole 30 in the middle; the central hole of the annular plate 2 is larger than the through hole 30 of the core material.

[0097] In the above design, there is a through hole 30 in the middle of the core material. The air first enters the through hole 30, then passes through the core material to both sides, and finally flows out from the outer wall of the filter element shell 1. During this process, the carbon dioxide in the air is adsorbed by the carbon dioxide adsorption material 35 in the core material.

[0098] The central hole of the annular plate 2 is larger than the through hole 30 of the core material, which has the beneficial effect of not hindering air from entering the through hole 30 .

[0099] Furthermore, the annular plate 2 is connected to the inner wall of the air inlet by means of threads.

[0100] In the above design, the side wall of the annular plate 2 is provided with an external thread, and the inner wall of the air inlet is provided with an internal thread. The annular plate 2 is connected by the thread to achieve disassembly. Its beneficial effects are simple structure, reliable connection, and reduced manufacturing cost.

[0101] Reference Figure 6 As shown, three, four, five or seven filter elements 3 are allowed to be arranged in the filter element housing 1 .

[0102] In the above design, a plurality of filter elements 3 are arranged in the filter element housing 1, which has the beneficial effect of increasing the adsorption capacity of carbon dioxide and making the adsorption more efficient.

[0103] Reference Figure 7 As shown, a carbon dioxide capture and recovery system with a replaceable carbon dioxide adsorption filter element 3 is used, which includes a filter element 3, and the filter element 3 includes a shell as a filter element shell 1;

[0104] The filter element housing 1 is provided with an air inlet at one end and is closed at the other end. The housing on the air inlet side is turned outward to form a flange 12;

[0105] The side wall of the filter element housing 1 is provided with at least two through grooves 11 extending inside and outside.

[0106] The filter element housing 1 is filled with a core material made of carbon dioxide adsorbent material 35, and a through hole 30 is provided in the middle of the core material;

[0107] It also includes an annular plate 2, which is detachably connected to the inner wall of the air inlet to fix the core material in the filter housing 1;

[0108] The central hole of the annular plate 2 is larger than the through hole 30 of the core material;

[0109] It also includes a pipeline for transporting flue gas and a carbon dioxide capture and recovery system connected to the pipeline;

[0110] The carbon dioxide capture and recovery system includes an airtight shell serving as an exchange chamber 4, wherein the exchange chamber 4 is provided with a smoke inlet and a smoke outlet, wherein the smoke inlet is provided with a valve 6, and the smoke outlet is provided with a valve 6;

[0111] The filter element 3 is detachably connected to the smoke inlet through the flange 12, and the filter element 3 extends into the exchange chamber 4;

[0112] A heat exchange pipe 5 is provided between the outer wall of the filter cartridge housing 1 and the inner wall of the exchange chamber 4. The heat exchange pipe 5 is arranged around the outer wall of the filter cartridge housing 1, with both ends passing through the shell of the exchange chamber 4, forming two interfaces on the outer wall of the exchange chamber 4.

[0113] One of the interfaces is connected to a pipeline for conveying flue gas through an air pump 10, and the other interface is connected to the atmosphere;

[0114] It also includes a compressor, the air extraction port of the compressor is connected to the exchange chamber 4;

[0115] The exhaust port of the compressor is connected to an air storage tank.

[0116] In the above design, the exchange chamber 4 has a smoke inlet and a smoke outlet. The filter element 3 is detachably connected to the smoke inlet of the exchange chamber 4 through a flange 12. The filter element 3 extends into the exchange chamber 4. The smoke inlet and smoke outlet are respectively provided with valves 6. The carbon dioxide capture and recovery system captures and recovers carbon dioxide from the air in two stages:

[0117] The first stage is the adsorption stage. At this time, the valves 6 at the smoke inlet and smoke outlet are opened, and air flows through and penetrates the core material in the filter element 3. The cross-linked primary amine resin or polyethyleneimine resin in the core material is adsorbed;

[0118] The second stage is the desorption stage. At this time, the valves 6 at the smoke inlet and smoke outlet are closed, the exchange chamber 4 is in a closed state, and the heat exchange pipe 5 introduces high-temperature flue gas, which causes the temperature in the exchange chamber 4 to rise. The cross-linked primary amine resin or polyethyleneimine resin in the core material desorbs carbon dioxide, and the compressor compresses the desorbed carbon dioxide into the gas storage tank.

[0119] For further optimization, the flange 12 of the filter element housing 1 is snap-connected in the smoke inlet.

[0120] In the above design, the smoke inlet is provided with an elastic protrusion, and the flange 12 of the filter housing 1 can be snapped into the protrusion to form a detachable snap-fit ​​structure. The detachable connection adopts a snap-fit ​​structure, which has the beneficial effect of quick disassembly and high installation and disassembly efficiency.

[0121] Reference Figure 7 As shown, it also includes a temperature control system for controlling the temperature of the flue gas using a heat exchanger 7, and the temperature control system includes a temperature sensor system 9 and a water pump 8;

[0122] It also includes a cooling water circulation system, which includes a water outlet and a water return outlet;

[0123] The heat source inlet of the heat exchanger 7 is connected to the pipeline for conveying flue gas, and the heat source outlet of the heat exchanger 7 is connected to the smoke inlet;

[0124] The water outlet is connected to the cold source inlet of the heat exchanger 7 through the water pump 8, and the cold source outlet of the heat exchanger 7 is connected to the water return port;

[0125] The detection head of the temperature sensor system 9 is arranged at the heat source outlet of the heat exchanger 7, and the control output interface of the temperature sensor system 9 controls the water flow rate of the water pump 8;

[0126] The temperature of the flue gas output from the heat source outlet of the heat exchanger 7 is 70-80°C.

[0127] In the above design, a temperature control system is set between the flue gas conveying pipeline and the exchange chamber 4. The temperature control system uses the heat exchanger 7 as the heat exchange and temperature control device. The temperature of the flue gas is controlled by measuring and controlling the water flow of the water pump 8 through the temperature sensor system 9, so that the temperature of the flue gas after heat exchange and cooling by the heat exchanger 7 can be maintained in the temperature range required for the high adsorption rate of the carbon dioxide adsorption material 35.

[0128] After many experiments, it was shown that the adsorption capacity of cross-linked primary amine resin or polyethyleneimine resin was 3.85 mmol / g at an adsorption temperature of 55°C, and the adsorption capacity could be as high as 4.70 mmol / g at an adsorption temperature of 75°C. It dropped to 3.52 mmol / g at an adsorption temperature of 95°C, and when the adsorption temperature was further increased to 115°C, the adsorption rate was further reduced to 2.47 mmol / g.

[0129] The adsorption rate data from multiple experiments can be summarized as follows: the optimal temperature range for the adsorption rate of cross-linked primary amine resin or polyethyleneimine resin is 75℃±5℃.

[0130] Furthermore, the heat exchanger 7 is a shell and tube flue gas heat exchanger.

[0131] In the above design, the heat exchanger 7 is used to cool the flue gas so that the temperature of the flue gas is reduced to a temperature that is suitable for the cross-linked primary amine resin or polyethyleneimine resin to have a high adsorption rate for carbon dioxide.

[0132] Shell and tube flue gas heat exchangers are suitable for heat exchange between different media, such as flue gas-flue gas, flue gas-steam, flue gas-circulating water, etc. This type of heat exchanger has strong pressure bearing capacity, simple and durable structure. The shell and tube flue gas heat exchanger has the beneficial effect of low cost and can save construction costs.

[0133] Furthermore, in order to provide a concise description of the exemplary embodiments, all features of the actual embodiment may not be described, i.e., those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention.

[0134] It should be understood that in the development of any actual embodiment, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but for those of ordinary skill having the benefit of this disclosure, the development effort will be a routine task of design, fabrication, and production without undue experimentation.

[0135] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. A replaceable carbon dioxide adsorption filter element, comprising a filter element, characterized in that: The filter element includes a housing serving as a filter element shell; One end of the filter element shell is provided with an air inlet, and the other end is closed, and the shell on the air inlet side is turned outward to form a flange; The side wall of the filter element housing is provided with at least two through grooves running through the inside and outside; The filter shell is filled with a core material made of carbon dioxide adsorption material; It also includes an annular plate, which is detachably connected to the inner wall of the air inlet to fix the core material in the filter core shell.

2. The replaceable carbon dioxide adsorption filter element according to claim 1, characterized in that: The core material adopts one of cylindrical and radial shapes.

3. The replaceable carbon dioxide adsorption filter element according to claim 1, characterized in that: The core material has a through hole in the middle; The central hole of the annular plate is larger than the through hole of the core material.

4. The replaceable carbon dioxide adsorption filter element according to claim 1, characterized in that: The annular plate is connected to the inner wall of the air inlet through threads.

5. The replaceable carbon dioxide adsorption filter element according to claim 1, characterized in that: Three, four, five or seven filter elements are allowed to be arranged in the filter element housing.

6. A carbon dioxide capture and recovery system with a replaceable carbon dioxide adsorption filter element, applied to the replaceable carbon dioxide adsorption filter element according to any one of claims 1 to 5, characterized in that: The filter element includes a filter element, and the filter element includes a shell as a filter element shell; One end of the filter element shell is provided with an air inlet, and the other end is closed, and the shell on the air inlet side is turned outward to form a flange; The side wall of the filter element housing is provided with at least two through grooves running through the inside and outside; The filter shell is filled with a core material made of carbon dioxide adsorption material, and the middle of the core material has a through hole; It also includes an annular plate that is detachably connected to the inner wall of the air inlet to fix the core material in the filter shell; The central hole of the annular plate is larger than the through hole of the core material; It also includes a pipeline for transporting flue gas and a carbon dioxide capture and recovery system connected to the pipeline; The carbon dioxide capture and recovery system includes an airtight shell serving as an exchange chamber, the exchange chamber being provided with a smoke inlet and a smoke outlet, the smoke inlet being provided with a valve, and the smoke outlet being provided with a valve; The filter element is detachably connected to the smoke inlet through a flange, and the filter element extends into the exchange chamber; A heat exchange pipe is provided between the outer wall of the filter cartridge shell and the inner wall of the exchange chamber. The heat exchange pipe is arranged around the outer wall of the filter cartridge shell, and the two ends of the heat exchange pipe pass through the shell of the exchange chamber respectively, forming two interfaces on the outer wall of the exchange chamber; One of the interfaces is connected to a pipeline for conveying flue gas through an air pump, and the other interface is connected to the atmosphere; It also includes a compressor, the air extraction port of the compressor is connected to the exchange chamber; The exhaust port of the compressor is connected to an air storage tank.

7. The carbon dioxide capture and recovery system with a replaceable carbon dioxide adsorption filter element according to claim 6, characterized in that: The flange buckle of the filter element shell is connected to the smoke inlet.

8. The carbon dioxide capture and recovery system with a replaceable carbon dioxide adsorption filter element according to claim 6, characterized in that: It also includes a temperature control system for controlling the temperature of the flue gas using a heat exchanger, the temperature control system including a temperature sensor system and a water pump; It also includes a cooling water circulation system, which includes a water outlet and a water return outlet; The heat source inlet of the heat exchanger is connected to the pipeline for conveying flue gas, and the heat source outlet of the heat exchanger is connected to the flue gas inlet; The water outlet is connected to the cold source inlet of the heat exchanger through a water pump, and the cold source outlet of the heat exchanger is connected to the return water outlet; The detection head of the temperature sensor system is arranged at the heat source outlet of the heat exchanger, and the control output interface of the temperature sensor system controls the water outlet flow of the water pump.

9. The carbon dioxide capture and recovery system with a replaceable carbon dioxide adsorption filter element according to claim 8, characterized in that: The heat exchanger adopts shell and tube flue gas heat exchanger.

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