Variable zoning wheelbox apparatus for co2 capture in flue gas and test method
By using a variable-zone rotary drum unit and a cellular rotary drum design, the problems of high energy consumption and discontinuity in flue gas CO2 capture are solved, achieving low-energy, high-efficiency CO2 recovery and expanding the application scope.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- XINJIANG PETROLEUM ENG DESIGN CO LTD
- Filing Date
- 2024-12-05
- Publication Date
- 2026-06-05
AI Technical Summary
Existing flue gas CO2 capture technologies suffer from high energy consumption, high pressure resistance, complex valve switching, and discontinuous processes, which limit their large-scale commercial application.
The variable partition rotary box device uses flexible adjustment of the honeycomb rotary partition area, combined with the rotation of the honeycomb rotary and the design of different partition components, to achieve continuous capture of flue gas CO2, reduce regeneration energy consumption and pressure resistance.
It achieves high-efficiency recovery and low-energy capture of CO2 from large-flow flue gas, reduces equipment costs, expands the application range, and avoids heat loss caused by valve switching.
Smart Images
Figure CN122141406A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the technical field of carbon capture equipment and methods, and is a variable partition rotary box device and testing method for capturing CO2 in flue gas, and also includes a method for capturing CO2 in flue gas. Background Technology
[0002] The strong demand for carbon capture, storage, and utilization (CCUS) has driven the development of flue gas CO2 capture technology. Flue gas CO2 capture technologies based on absorption and adsorption methods have been widely applied, with extensive pilot-scale and commercial operations conducted in industries such as power, cement, and steel. Numerous scholars and companies both domestically and internationally have conducted extensive research on the development of novel absorbents / adsorbents, equipment modification, and process improvement. Data shows that regeneration energy consumption accounts for approximately 70% of the total cost of adsorption-based carbon capture processes, and approximately 50% of the total cost of absorption-based carbon capture processes. Currently, flue gas CO2 capture technologies based on solvent absorption and solid adsorption are still in the development stage of commercial operation and industrial demonstration. The excessively high unit capture energy consumption of adsorption and absorption methods limits the large-scale commercial application of most current flue gas CO2 capture and recovery technologies. The high energy consumption of absorption and adsorption methods for capturing CO2 from flue gas is mainly determined by three factors. First, the regeneration and desorption of the materials themselves consume energy; the properties and diffusion characteristics of the absorption / adsorption materials determine the regeneration temperature and energy consumption. Second, the treatment of low-concentration, high-flow-rate flue gas results in excessively high pressure resistance in the chemical absorbent liquid or adsorbent fixed bed, leading to high power losses. Third, the discontinuous nature of current absorption / adsorption processes necessitates intermittent switching operations, resulting in additional internal heat loss. While the demand for flue gas CO2 capture has spurred extensive research into CO2 capture technologies both domestically and internationally, the problem of excessive energy consumption remains unresolved, limiting its practical application.
[0003] Chinese patent document CN220214443U discloses a carbon dioxide capture system for flue gas. This system includes an absorption tower, a desorption tower, a primary heat exchange system, and a secondary heat exchange system. By performing multiple heat exchanges, the system's heat consumption is reduced. The captured CO2 is then sent to a CO2 utilization unit, thereby reducing both the overall cost of carbon dioxide capture and the cost of CO2 utilization.
[0004] Chinese patent document CN118925446A discloses a carbon dioxide capture system and method. The carbon dioxide capture system includes a first capture zone, a second capture zone, and a third capture zone. The first capture zone is connected to an inlet pipe. The first, second, and third capture zones are sequentially connected, allowing gas to pass through them sequentially to capture carbon dioxide in at least two of the three states: gaseous, liquid, and solid. The carbon dioxide capture method is used to capture carbon dioxide using the aforementioned carbon dioxide capture system. The carbon dioxide capture system and method disclosed in this invention can improve the carbon dioxide capture efficiency and facilitate the collection and storage of carbon dioxide.
[0005] In existing technologies, the characteristics of flue gas treatment (low concentration, high flow rate) lead to equipment corrosion and high pressure resistance in chemical absorbent or adsorbent fixed beds, resulting in high material losses and excessive energy consumption. The discontinuous nature of current absorption / adsorption processes necessitates intermittent switching operations, leading to additional internal heat loss. The demand for flue gas CO2 capture has spurred extensive research into flue gas CO2 capture technologies both domestically and internationally. However, the high pressure resistance, high energy consumption, and complex valve switching issues associated with fixed beds have not yet been adequately addressed.
[0006] Rotary adsorption technology, as a mature technology, has been widely used in various fields such as pollution control and air conditioning, and possesses unique advantages in handling large-volume gas flows. For gas separation technology based on rotary adsorption, continuous process operation can be ensured without valve switching, with high desorption heat utilization and recovery rates, low pretreatment requirements, and easily scalable hydrodynamic properties and mechanical structures. In summary, the advantages of rotary adsorption technology allow it to avoid, to some extent, the high energy consumption and environmental problems associated with current adsorption and absorption methods, making it more suitable for the future demand for large-volume flue gas CO2 capture.
[0007] In view of this, the present invention proposes a variable partition rotary drum device and testing method for CO2 capture in flue gas, which can realize flexible partitioning of the rotary drum to match a suitable CO2 adsorption concentration. Summary of the Invention
[0008] This invention provides a variable partitioned rotary chamber device and testing method for CO2 capture in flue gas, which overcomes the shortcomings of the prior art by using different partitioning components to change the partition area of the honeycomb rotary chamber and to cope with the capture of different CO2 concentrations.
[0009] One of the technical solutions of the present invention is achieved through the following measures: a variable partition rotary wheel box device for CO2 capture in flue gas, comprising a sealed front cover, a front partitioning component, a rotary wheel box, a honeycomb rotary wheel, a rear partitioning component, and a sealed rear cover. A honeycomb rotary wheel is concentrically installed inside the rotary wheel box. A sealed front cover is fixedly installed on the left side of the rotary wheel box, and a sealed rear cover is fixedly installed on the right side of the rotary wheel box. A front partitioning component that divides the left side of the honeycomb rotary wheel into an adsorption zone, a desorption zone, and a cooling zone is installed on the left side of the honeycomb rotary wheel. A rear partitioning component that is symmetrical to the front partitioning component is installed on the right side of the honeycomb rotary wheel. An adsorption zone inlet, a desorption zone inlet, and a cooling zone inlet are circumferentially arranged on the sealed front cover. An adsorption zone outlet, a desorption zone outlet, and a cooling zone outlet are circumferentially arranged on the sealed rear cover, corresponding to the left and right sides of the adsorption zone inlet, the desorption zone inlet, and the cooling zone inlet, respectively.
[0010] The following are further optimizations and / or improvements to one of the above-mentioned technical solutions: The aforementioned front and rear partition components adopt the first type of partition component, which is a fan-shaped frame with an included angle of 90 degrees between the two sides of the fan-shaped frame. When the front and rear partition components adopt the first type of partition component, the adsorption area occupies three-quarters of the honeycomb rotor area, the desorption area occupies one-eighth of the honeycomb rotor area, and the cooling area occupies one-eighth of the honeycomb rotor area.
[0011] The aforementioned front and rear partition components adopt the second type of partition component, which is a semi-circular frame. When the front and rear partition components adopt the second type of partition component, the adsorption area occupies half of the honeycomb rotor area, the desorption area occupies one-quarter of the honeycomb rotor area, and the cooling area occupies one-quarter of the honeycomb rotor area.
[0012] The aforementioned front and rear partition components adopt a third type of partition component, which is a fan-shaped frame with an included angle greater than 180 degrees between the two sides of the fan-shaped frame. When the front and rear partition components adopt the third type of partition component, the adsorption zone occupies one-third of the area of the honeycomb rotor, the desorption zone occupies one-third of the area of the honeycomb rotor, and the cooling zone occupies one-third of the area of the honeycomb rotor.
[0013] The aforementioned honeycomb rotor is a rotor-shaped disc made of ceramic fiber, glass fiber, or carbon fiber, and the cross-sectional shape of the honeycomb rotor is honeycomb-shaped.
[0014] The materials used for the aforementioned front and rear partition components are all high-temperature resistant materials, which are selected from silicone, stainless steel, carbon steel, high-temperature resistant plastic, and aluminum.
[0015] The aforementioned variable partition rotary box device for CO2 capture in flue gas also includes a rotating shaft. A mounting hole is provided at the center of the honeycomb rotary wheel. The rotating shaft passes through the mounting hole and the honeycomb rotary wheel is mounted on the rotating shaft through a bearing seat.
[0016] The top of the aforementioned front partition component is fixedly connected to the wheel housing by fasteners, and the top of the rear partition component is fixedly connected to the wheel housing by fasteners.
[0017] The right side of the aforementioned front partition component is in close contact with the left side of the honeycomb wheel, and the left side of the rear partition component is in close contact with the right side of the honeycomb wheel.
[0018] A sealed front cover is fixedly installed on the left side of the aforementioned rotary gear box using fasteners, and a sealed rear cover is fixedly installed on the right side of the rotary gear box using fasteners.
[0019] The second technical solution of the present invention is achieved through the following measures: a method for capturing CO2 in flue gas using the variable partition rotary box device for CO2 capture in flue gas as described in the first technical solution, comprising: Flue gas enters the honeycomb rotor corresponding to the adsorption zone through the inlet of the adsorption zone. The CO2 adsorbent in the honeycomb rotor is used to decarbonize the flue gas. The CO2 removed from the flue gas is adsorbed in the honeycomb rotor corresponding to the adsorption zone. The flue gas with CO2 removed is discharged through the outlet of the adsorption zone. The honeycomb rotor rotates clockwise, and the area of the honeycomb rotor adsorbed with CO2 rotates to the desorption zone. High-temperature desorption gas is transported to the desorption zone through the inlet of the desorption zone. The high-temperature desorption gas is used to desorb and desorb the CO2 adsorbed at the honeycomb rotor corresponding to the desorption zone, forming CO2 desorbed gas. The CO2 desorbed gas is discharged through the outlet of the desorption zone. The honeycomb rotor continues to rotate clockwise. After desorption and desorption of CO2, the honeycomb rotor area rotates to the cooling zone. Cooling gas is delivered to the cooling zone through the cooling zone inlet and used to cool the corresponding honeycomb rotor. The cooled gas is then discharged through the cooling zone outlet. The honeycomb rotor continues to rotate clockwise. After cooling, the honeycomb rotor area rotates to the adsorption zone, where CO2 decarbonization of the flue gas begins. In this way, the CO2 capture operation of the flue gas can be carried out continuously.
[0020] The following are further optimizations and / or improvements to the second technical solution of the above invention: Preferably, the flow rate of the flue gas entering the adsorption zone is 50 Nm³. 3 / h to 1000Nm 3 The adsorption temperature is 30°C to 70°C, and the flue gas contains 5% to 40% CO2, a relative humidity of 20% to 60%, and 30 ppm to 200 ppm SO2. X NO from 30ppm to 200ppmX and particulate matter.
[0021] Preferably, the temperature of the above-mentioned high-temperature desorbed gas is between 100°C and 200°C.
[0022] Preferably, the rotational speed of the aforementioned honeycomb rotor is between 3 r / h and 11 r / h.
[0023] Preferably, the diameter of the aforementioned honeycomb rotor is between 500 mm and 1500 mm.
[0024] Preferably, the CO2 desorbed gas discharged from the desorption zone outlet is heated to the temperature of the high-temperature desorbed gas, and then transported to the desorption zone through the desorption zone inlet to continue desorbing the CO2 adsorbed at the corresponding honeycomb rotor in the desorption zone. In this way, the CO2 desorbed gas is continuously enriched with CO2.
[0025] The third technical solution of the present invention is achieved by the following measures: a test method for a variable partition rotary box device for CO2 capture in flue gas as described in one of the technical solutions, comprising: measuring the CO2 concentration at the inlet of the adsorption zone and the outlet of the adsorption zone respectively.
[0026] The variable-zone rotary drum device and method for capturing CO2 in flue gas described in this invention have the characteristics of low regeneration energy consumption, low pressure resistance, continuous process, and high heat recovery rate. By simply replacing the partitioning components (front partitioning component and rear partitioning component) in the rotary drum, the area of the honeycomb rotary drum partitions (adsorption zone, desorption zone, and cooling zone) can be changed to cope with the treatment of CO2 flue gas of different concentrations, which greatly expands the application range of the rotary drum and reduces the design cost of rotary drum production.
[0027] This invention utilizes a rotating honeycomb wheel to continuously decarbonize high-flow-rate flue gas, achieving a CO2 recovery rate of over 90%. Furthermore, by designing different partitioned components, it addresses the capture of varying CO2 concentrations, thereby reducing equipment costs and increasing carbon capture efficiency. Attached Figure Description
[0028] Appendix Figure 1 This is a three-dimensional structural diagram of a variable-zone rotary box device used for CO2 capture in flue gas.
[0029] Appendix Figure 2 This is a schematic diagram of the structure of the first type of partition component.
[0030] Appendix Figure 3 This is a schematic diagram of the structure of the second type of partition component.
[0031] Appendix Figure 4 This is a schematic diagram of the structure of the third type of partition component.
[0032] The codes in the attached diagram are as follows: 1 is the sealed front cover, 2 is the desorption zone inlet, 3 is the cooling zone inlet, 4 is the adsorption zone inlet, 5 is the desorption zone outlet, 6 is the cooling zone outlet, 7 is the adsorption zone outlet, 8 is the sealed rear cover, 9 is the rotor housing, 10 is the front partition component, 11 is the adsorption zone, 12 is the desorption zone, 13 is the cooling zone, 14 is the honeycomb rotor, and 15 is the mounting hole. Detailed Implementation
[0033] The present invention is not limited to the following embodiments, and the specific implementation can be determined according to the technical solution of the present invention and the actual situation.
[0034] In this invention, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as the positional relationships of front, back, top, bottom, left, and right, which are based on the instructions attached. Figure 1 The orientation of the layout is determined by the direction of the map.
[0035] In this invention, ppm represents mg / L. The normal temperature in this invention generally refers to a temperature between 15°C and 25°C, typically defined as 20°C.
[0036] The present invention will be further described below with reference to embodiments: Example 1: As shown in the attached document Figures 1 to 4 As shown, a variable partition rotary drum device for CO2 capture in flue gas includes a sealed front cover 1, a front partitioning component 10, a rotary drum housing 9, a honeycomb rotary drum 14, a rear partitioning component, and a sealed rear cover 8. The honeycomb rotary drum 14 is concentrically installed inside the rotary drum housing 9. The sealed front cover 1 is fixedly installed on the left side of the rotary drum housing 9, and the sealed rear cover 8 is fixedly installed on the right side of the rotary drum housing 9. The front partitioning component 10, which divides the left side of the honeycomb rotary drum 14 into an adsorption zone 11, a desorption zone 12, and a cooling zone 13, is installed on the left side of the honeycomb rotary drum 14. The rear partitioning component, which is symmetrical to the front partitioning component 10, is installed on the right side of the honeycomb rotary drum 14. The sealed front cover 1 is circumferentially provided with an adsorption zone inlet 4, a desorption zone inlet 2, and a cooling zone inlet 3. The sealed rear cover 8 is circumferentially provided with an adsorption zone outlet 7, a desorption zone outlet 5, and a cooling zone outlet 6, which correspond to the adsorption zone inlet 4, the desorption zone inlet 2, and the cooling zone inlet 3, respectively.
[0037] During the rotation of the honeycomb wheel 14, the front partition component 10 and the rear partition component remain stationary.
[0038] Example 2: As shown in the attached document Figure 2As shown, as an optimization of the above embodiment 1, the front partition component 10 and the rear partition component adopt the first type of partition component. The first type of partition component is a fan-shaped frame with an included angle of 90 degrees between the two sides of the fan-shaped frame. When the front partition component 10 and the rear partition component adopt the first type of partition component, the adsorption area 11 occupies three-quarters of the area of the honeycomb rotor 14, the desorption area 12 occupies one-eighth of the area of the honeycomb rotor 14, and the cooling area 13 occupies one-eighth of the area of the honeycomb rotor 14.
[0039] When the adsorption zone 11 occupies three-quarters of the area of the honeycomb rotor 14, the area of the adsorption zone 11 is at its maximum, which can achieve the capture of high concentrations of CO2.
[0040] Example 3: As shown in the attached document Figure 3 As shown, as an optimization of the above embodiment 1, the front partition component 10 and the rear partition component adopt a second type of partition component. The second type of partition component is a semi-circular frame. When the front partition component 10 and the rear partition component adopt the second type of partition component, the adsorption area 11 occupies half of the area of the honeycomb rotor 14, the desorption area 12 occupies one-quarter of the area of the honeycomb rotor 14, and the cooling area 13 occupies one-quarter of the area of the honeycomb rotor 14.
[0041] When the adsorption zone 11 occupies half the area of the honeycomb rotor 14, the area of the adsorption zone 11 is moderate, which can achieve the capture of medium concentration CO2.
[0042] Example 4: As shown in the appendix Figure 4 As shown, as an optimization of the above embodiment 1, the front partition component 10 and the rear partition component adopt a third type of partition component. The third type of partition component is a fan-shaped frame with an included angle between the two sides of the fan-shaped frame greater than 180 degrees. When the front partition component 10 and the rear partition component adopt the third type of partition component, the adsorption zone 11 occupies one-third of the area of the honeycomb rotor 14, the desorption zone 12 occupies one-third of the area of the honeycomb rotor 14, and the cooling zone 13 occupies one-third of the area of the honeycomb rotor 14.
[0043] When the adsorption zone 11 occupies one-third of the area of the honeycomb rotor 14, the area of the adsorption zone 11 is at its minimum, which can achieve the capture of low concentration CO2.
[0044] Example 5: As an optimization of the above embodiments, the honeycomb wheel 14 is a rotating disc made of ceramic fiber, glass fiber or carbon fiber, and the cross-sectional shape of the honeycomb wheel 14 is honeycomb.
[0045] The cross-section of the honeycomb rotor 14 is perpendicular to the axis of rotation.
[0046] Example 6: As an optimization of the above embodiment, the front partition component 10 and the rear partition component are both made of high-temperature resistant materials, which are selected from silicone, stainless steel, carbon steel, high-temperature resistant plastic and aluminum.
[0047] Example 7: As an optimization of the above embodiment, the variable partition rotary box device for CO2 capture in flue gas further includes a rotating shaft. The center of the honeycomb rotary wheel 14 is provided with a mounting hole 15. The rotating shaft passes through the mounting hole 15 and the honeycomb rotary wheel 14 is mounted on the rotating shaft through a bearing seat.
[0048] Both the front sealing cover 1 and the rear sealing cover 8 are provided with sealing holes corresponding to the rotating shaft, and the left and right ends of the rotating shaft pass through the sealing holes of the front sealing cover 1 and the rear sealing cover 8 respectively.
[0049] One of the driving methods for the honeycomb rotor 14 is that the shaft is driven by a motor, and the power output end of the motor is fixedly connected to the shaft.
[0050] The second driving method for the honeycomb rotor 14 is as follows: the motor can drive the honeycomb rotor 14 to rotate through chain drive, belt drive, or gear drive. For example, when using belt drive, the power output end of the motor is fixedly mounted with a drive wheel, and the belt is simultaneously wrapped around the outside of the honeycomb rotor 14 and the outside of the drive wheel, thereby driving the honeycomb rotor 14 to rotate through the motor.
[0051] Example 8: As an optimization of the above embodiment, the top end of the front partition component 10 is fixedly connected to the wheel housing 9 by fasteners, and the top end of the rear partition component is fixedly connected to the wheel housing 9 by fasteners.
[0052] Fasteners are used to fix the front partition component 10 and the rear partition component to the rotating wheel housing 9, so that the honeycomb rotating wheel 14 can rotate relative to the front partition component 10 and the rear partition component.
[0053] Example 9: As an optimization of the above embodiment, in order to ensure the isolation of flue gas in the adsorption zone 11, desorption zone 12, and cooling zone 13, thereby increasing the CO2 concentration of the desorbed gas in the desorption zone 12 and increasing the concentration of enriched CO2, the right side of the front partition component 10 is in close contact with the left side of the honeycomb rotor 14, and the left side of the rear partition component is in close contact with the right side of the honeycomb rotor 14.
[0054] Example 10: As an optimization of the above embodiment, a sealing front cover 1 is fixedly installed on the left side of the rotary wheel housing 9 by fasteners, and a sealing rear cover 8 is fixedly installed on the right side of the rotary wheel housing 9 by fasteners.
[0055] When it is necessary to replace the front partition component 10 and the rear partition component, remove the fasteners, open the sealing front cover 1 and the sealing rear cover 8, and then remove the front partition component 10 and the rear partition component, and replace them with the front partition component 10 and the rear partition component of the required shape. By simply replacing the partition components (front partition component 10 and rear partition component) inside the rotor housing 9, the area of the rotor partitions (adsorption zone 11, desorption zone 12, cooling zone 13) can be changed.
[0056] Bolts can be used as fasteners.
[0057] The aforementioned honeycomb rotor 14 is also coated with a CO2 adsorbent.
[0058] Preferably, the CO2 adsorbent is one or a combination of several of the following: 13X molecular sieve, 5A molecular sieve, clinoptilolite molecular sieve, NaY molecular sieve, LiX molecular sieve, ordered mesoporous carbon, porous carbon, solid amine, activated carbon supported amine, MCM-41 molecular sieve, and MOR molecular sieve.
[0059] Example 11: A method for capturing CO2 in flue gas using the variable partition rotary box device for CO2 capture in flue gas described in the above examples, comprising: S1: After the flue gas comes out of the exhaust chimney, it first undergoes traditional desulfurization and denitrification treatment, and then enters the honeycomb rotor 14 corresponding to the adsorption zone 11 through the adsorption zone inlet 4 via the air supply fan. The CO2 adsorbent in the honeycomb rotor 14 is used to decarbonize the flue gas. The CO2 removed from the flue gas is adsorbed in the honeycomb rotor 14 corresponding to the adsorption zone 11, and the CO2 removed flue gas is discharged through the adsorption zone outlet 7. S2: The honeycomb rotor 14 rotates clockwise, and the area of the honeycomb rotor 14 with adsorbed CO2 rotates to the desorption zone 12. The high-temperature desorption gas after being heated by the heater is transported to the desorption zone 12 through the desorption zone inlet 2. The high-temperature desorption gas is used to desorb and desorb the CO2 adsorbed at the honeycomb rotor 14 corresponding to the desorption zone 12 to form CO2 desorbed gas. The CO2 desorbed gas is discharged through the desorption zone outlet 5. S3: The honeycomb rotor 14 continues to rotate clockwise. After desorption and desorption of CO2, the honeycomb rotor 14 rotates to the cooling zone 13. The ambient temperature air is first cooled by the cooler to form cooling gas. The cooling gas is transported to the cooling zone 13 through the cooling zone inlet 3. The cooling gas is used to cool the honeycomb rotor 14 corresponding to the cooling zone 13. The cooled gas is discharged through the cooling zone outlet 6 and discharged to the exhaust chimney. S4: The honeycomb rotor 14 continues to rotate clockwise. After cooling, the honeycomb rotor 14 rotates to the adsorption zone 11 and begins the CO2 decarbonization treatment of the flue gas. In this way, the CO2 capture operation of the flue gas is carried out continuously.
[0060] Example 12: As an optimization of Example 11 above, the flow rate of flue gas entering adsorption zone 11 is 50 Nm³, as needed. 3 / h to 1000Nm 3 The adsorption temperature is 30°C to 70°C, and the flue gas contains 5% to 40% CO2, a relative humidity of 20% to 60%, and 30 ppm to 200 ppm SO2. X NO from 30ppm to 200ppm X and particulate matter.
[0061] Example 13: As an optimization of Example 11 above, the temperature of the high-temperature desorption gas is 100°C to 200°C, as needed. The high-temperature desorption gas is one or more of air, nitrogen, and argon.
[0062] Example 14: As an optimization of Example 11 above, the rotational speed of the honeycomb rotor 14 is 3 r / h to 11 r / h, as needed.
[0063] Example 15: As an optimization of Example 11 above, the diameter of the honeycomb wheel 14 is 500mm to 1500mm, as needed.
[0064] Example 16: As an optimization of Example 11 above, the CO2 desorbed gas discharged from the desorption zone outlet 5 is heated to the temperature of the high-temperature desorbed gas and then transported to the desorption zone 12 through the desorption zone inlet 2 to continue desorbing the CO2 adsorbed at the honeycomb rotor 14 corresponding to the desorption zone 12. In this way, the CO2 desorbed gas is continuously enriched with CO2.
[0065] Example 17: A test method for a variable partition rotary box device for CO2 capture in flue gas as described in Examples 1 to 10, comprising: measuring the CO2 concentration at the adsorption zone inlet 4 and the adsorption zone outlet 7 of the adsorption zone 11, respectively.
[0066] The CO2 recovery rate can be calculated using the measured CO2 concentration.
[0067] Implementation Case 1 See Figure 1 As shown, a method for capturing CO2 in flue gas using a variable-zone rotary box device for CO2 capture includes: First, the flue gas undergoes traditional desulfurization and denitrification treatment in a spray tower via an air supply fan, and then enters adsorption zone 11, where the flue gas has a CO2 concentration of 12%, a temperature of 35℃, a relative humidity of 60%, a NOx concentration of 60ppm, and a SO2 concentration of 12%. x The concentration was 70 ppm, and the flow rate was 700 Nm³. 3 / h. The CO2 adsorbent in adsorption zone 11 adsorbs CO2 into the adsorption zone 11, and the CO2 concentration of the decarbonized flue gas is below 1000ppm.
[0068] Afterwards, the honeycomb rotor 14 rotates clockwise, and the area of the honeycomb rotor 14 saturated with CO2 adsorption moves to the desorption zone 12. High-temperature desorption gas enters the desorption zone 12, and the CO2 adsorbed in the desorption zone 12 is desorbed by the purge of the high-temperature desorption gas. The enriched gas (i.e., CO2 desorbed gas) coming out of the desorption zone 12 is heated by the heater and then sent back to the desorption zone 12 for recycling as high-temperature desorption gas again, so that CO2 in the CO2 desorbed gas is continuously enriched to form CO2-enriched gas. Part of the enriched gas coming out of the desorption zone 12 is sent to the CO2 storage tank, and the other part is heated and sent back to the desorption zone 12 for recycling. The temperature of the high-temperature desorption gas is 120°C and is heated by the heater.
[0069] During operation, the rotational speed of the honeycomb rotor 14 is set to 6 r / h; the cooling temperature is adjusted to 20℃; the desorption temperature (high-temperature desorbed gas temperature) is 120℃; and the flow rate of the high-temperature desorbed gas is 700 Nm³. 3 / h.
[0070] See Figure 4 As shown, the partitioning components (including the front partitioning component 10 and the rear partitioning component) of this embodiment 1 adopt the second type of partitioning component, wherein the adsorption zone 11 occupies half of the rotor area, the desorption zone 12 occupies one-quarter of the rotor area, and the cooling zone 13 occupies one-quarter of the rotor area.
[0071] The diameter of the honeycomb rotor 14 is 0.545m and the thickness is 0.18m (the area of the adsorption zone 11 is obtained by dividing the flue gas flow rate by the inlet air velocity, and then the rotor area is calculated according to the ratio). The ratio of the area occupied by the adsorption zone 11, the desorption zone 12 and the cooling zone 13 is 2:1:1.
[0072] The CO2 adsorbent on the honeycomb rotor 14 is 13X molecular sieve.
[0073] Implementation Case 2 The other operating steps are the same as in Implementation Case 1, except that the partitioning component is the first type of partitioning component.
[0074] Implementation Case 3 The other operating steps are the same as in Implementation Case 1, except that the partitioning component is the third type of partitioning component.
[0075] Implementation Case 4 The other operating steps are the same as in Implementation Case 1, except that the partitioning component is the first type of partitioning component and the CO2 concentration in the flue gas inlet is 40%.
[0076] Implementation Case 5 The other operating steps are the same as in Implementation Case 1, except that the desorption temperature is 140℃.
[0077] Implementation Case 6 The other operating procedures are the same as in Implementation Case 1, except that the flue gas inlet flow rate is 400 Nm. 3 / h.
[0078] Implementation Case 7 The other operating steps are the same as in Implementation Case 1, except that the CO2 adsorbent on the rotor is 5A or MOR.
[0079] Table 1 shows the CO2 concentration, CO2 recovery rate, and purity of the recovered CO2 after treatment in Cases 1 to 7.
[0080] As shown in Table 1, the CO2 concentration in the flue gas after decarbonization was the lowest in Implementation Case 2, the CO2 recovery rate was the highest in Implementation Case 6, and the CO2 purity was the highest in Implementation Cases 5 and 6.
[0081] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The flue gas CO2 rotary adsorption capture technology (i.e. the method for capturing CO2 in flue gas) designed in this invention can realize the continuous large-scale flue gas CO2 capture and recovery, significantly reduce the operating cost of the process, and realize large-scale low-energy capture of CO2. (2) The present invention is provided with three partition components, namely an adsorption zone 11, a desorption zone 12, and a cooling zone 13. By replacing different partition components, the partition area of the honeycomb rotor can be changed to cope with the treatment of CO2 flue gas of different concentrations, which greatly expands the application range of the rotor box 9 and reduces the design cost of the rotor box 9 production.
[0082] (3) In view of the problem that the regeneration temperature of the existing rotary adsorption technology is high, the present invention can desorb at a lower temperature of 100°C to 150°C; (4) This invention will not produce waste byproducts or escape emissions, nor will it cause significant environmental, health or safety risks.
[0083] The above technical features constitute various embodiments of the present invention, which have strong adaptability and implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.
Claims
1. A variable-zone rotary drum device for CO2 capture in flue gas, characterized in that, The device includes a sealed front cover, a front partition component, a rotating wheel housing, a honeycomb rotating wheel, a rear partition component, and a sealed rear cover. The honeycomb rotating wheel is concentrically installed inside the rotating wheel housing. The sealed front cover is fixedly installed on the left side of the rotating wheel housing, and the sealed rear cover is fixedly installed on the right side of the rotating wheel housing. The left side of the honeycomb rotating wheel is limited by a front partition component that divides the left side of the honeycomb rotating wheel into an adsorption zone, a desorption zone, and a cooling zone. The right side of the honeycomb rotating wheel is limited by a rear partition component that is symmetrical to the left and right of the front partition component. The sealed front cover is circumferentially provided with an adsorption zone inlet, a desorption zone inlet, and a cooling zone inlet. The sealed rear cover is circumferentially provided with an adsorption zone outlet, a desorption zone outlet, and a cooling zone outlet, respectively corresponding to the left and right sides of the adsorption zone inlet, desorption zone inlet, and cooling zone inlet.
2. The variable-zone rotary box device for CO2 capture in flue gas according to claim 1, characterized in that, The front partition component and the rear partition component adopt the first type of partition component, which is a fan-shaped frame with an included angle of 90 degrees between the two sides of the fan-shaped frame. When the front partition component and the rear partition component adopt the first type of partition component, the adsorption area occupies three-quarters of the honeycomb rotor area, the desorption area occupies one-eighth of the honeycomb rotor area, and the cooling area occupies one-eighth of the honeycomb rotor area. Alternatively, the front and rear partition components may adopt the second type of partition component, which is a semi-circular frame. When the front and rear partition components adopt the second type of partition component, the adsorption area occupies half of the honeycomb rotor area, the desorption area occupies one-quarter of the honeycomb rotor area, and the cooling area occupies one-quarter of the honeycomb rotor area. Alternatively, the front and rear partition components may adopt a third type of partition component, which is a fan-shaped frame with an included angle greater than 180 degrees between the two sides of the fan-shaped frame. When the front and rear partition components adopt the third type of partition component, the adsorption zone occupies one-third of the area of the honeycomb rotor, the desorption zone occupies one-third of the area of the honeycomb rotor, and the cooling zone occupies one-third of the area of the honeycomb rotor.
3. The variable-zone rotary box device for CO2 capture in flue gas according to claim 1 or 2, characterized in that, The honeycomb rotor is a rotating disc made of ceramic fiber, glass fiber, or carbon fiber, and the cross-sectional shape of the honeycomb rotor is honeycomb-shaped. Or / and, the front partition component and the rear partition component are both made of high-temperature resistant materials, wherein the high-temperature resistant materials are one of silicone, stainless steel, carbon steel, high-temperature resistant plastic and aluminum; Or / and, the variable partition rotary box device for CO2 capture in flue gas further includes a rotating shaft, with a mounting hole at the center of the honeycomb rotary wheel, the rotating shaft passing through the mounting hole and the honeycomb rotary wheel mounted on the rotating shaft via a bearing seat.
4. The variable-zone rotary drum device for CO2 capture in flue gas according to claim 1 or 2, characterized in that, The top of the front partition component is fixedly connected to the wheel housing by fasteners, and the top of the rear partition component is fixedly connected to the wheel housing by fasteners. Or / and, the right side of the front partition component is in close contact with the left side of the honeycomb wheel, and the left side of the rear partition component is in close contact with the right side of the honeycomb wheel; Or / and, a sealed front cover is fixedly installed on the left side of the rotary gear box by fasteners, and a sealed rear cover is fixedly installed on the right side of the rotary gear box by fasteners.
5. The variable-zone rotary box device for CO2 capture in flue gas according to claim 3, characterized in that, The top of the front partition component is fixedly connected to the wheel housing by fasteners, and the top of the rear partition component is fixedly connected to the wheel housing by fasteners. Or / and, the right side of the front partition component is in close contact with the left side of the honeycomb wheel, and the left side of the rear partition component is in close contact with the right side of the honeycomb wheel; Or / and, a sealed front cover is fixedly installed on the left side of the rotary gear box by fasteners, and a sealed rear cover is fixedly installed on the right side of the rotary gear box by fasteners.
6. A method for capturing CO2 in flue gas using a variable-zone rotary box device for CO2 capture in flue gas as described in any one of claims 1 to 5, characterized in that, include: Flue gas enters the honeycomb rotor corresponding to the adsorption zone through the inlet of the adsorption zone. The CO2 adsorbent in the honeycomb rotor is used to decarbonize the flue gas. The CO2 removed from the flue gas is adsorbed in the honeycomb rotor corresponding to the adsorption zone. The flue gas with CO2 removed is discharged through the outlet of the adsorption zone. The honeycomb rotor rotates clockwise, and the area of the honeycomb rotor adsorbed with CO2 rotates to the desorption zone. High-temperature desorption gas is transported to the desorption zone through the inlet of the desorption zone. The high-temperature desorption gas is used to desorb and desorb the CO2 adsorbed at the honeycomb rotor corresponding to the desorption zone, forming CO2 desorbed gas. The CO2 desorbed gas is discharged through the outlet of the desorption zone. The honeycomb rotor continues to rotate clockwise. After desorption and desorption of CO2, the honeycomb rotor area rotates to the cooling zone. Cooling gas is delivered to the cooling zone through the cooling zone inlet and used to cool the corresponding honeycomb rotor. The cooled gas is then discharged through the cooling zone outlet. The honeycomb rotor continues to rotate clockwise. After cooling, the honeycomb rotor area rotates to the adsorption zone, where CO2 decarbonization of the flue gas begins. In this way, the CO2 capture operation of the flue gas can be carried out continuously.
7. The method for capturing CO2 in flue gas according to claim 6, characterized in that, The flow rate of the flue gas entering the adsorption zone is 50 Nm. 3 / h to 1000Nm 3 The adsorption temperature is 30°C to 70°C, and the flue gas contains 5% to 40% CO2, a relative humidity of 20% to 60%, and 30 ppm to 200 ppm SO2. X NO from 30ppm to 200ppm X and particulate matter.
8. The method for capturing CO2 from flue gas according to claim 6 or 7, characterized in that, The temperature of the high-temperature desorbed gas is 100°C to 200°C; Or / and, the rotational speed of the cellular rotor is from 3 r / h to 11 r / h; Or / and, the diameter of the honeycomb rotor is 500mm to 1500mm.
9. The method for capturing CO2 from flue gas according to claim 8, characterized in that, The CO2 desorbed gas discharged from the desorption zone outlet is heated to the temperature of the high-temperature desorbed gas, and then transported to the desorption zone through the desorption zone inlet to continue desorbing the CO2 adsorbed at the corresponding honeycomb rotor in the desorption zone. In this way, the CO2 desorbed gas is continuously enriched with CO2.
10. A test method for a variable-zone rotary box device for CO2 capture in flue gas as described in any one of claims 1 to 5, characterized in that, The CO2 concentrations at the inlet and outlet of the adsorption zone were measured separately.