Carbon dioxide capture recovery device with recoverable waste heat

Abstract

The utility model relates to the technical field of energy -conserving and environment -protective, disclose carbon dioxide capture recovery unit of recyclable waste heat, including fixed frame, fixed frame outer wall one side is provided with the absorption tower, absorption tower outer wall one side is provided with the desorption tower, absorption tower outer wall fixedly connected with the outrigger, desorption tower outer wall fixedly connected with the outrigger, absorption tower outer wall fixedly connected with the flow guide pipe no.

Description

Technical Field

[0001] This utility model relates to the field of energy conservation and environmental protection technology, and in particular to a carbon dioxide capture and recovery device that can recover waste heat. Background Technology

[0002] Carbon dioxide capture and recovery devices are key environmental protection equipment used to treat carbon dioxide in industrial waste gas. They are mainly used in high-carbon emission industrial scenarios such as thermal power plants, steel smelting, and cement production. With the continuous improvement of global carbon emission reduction requirements, such equipment can effectively reduce greenhouse gas emissions and realize the recycling of carbon resources by capturing, separating and recovering carbon dioxide in industrial waste gas. This is of great significance to achieving the "dual carbon" goal.

[0003] Existing carbon dioxide capture and recovery devices typically employ a basic chemical absorption and desorption process structure. They achieve carbon dioxide capture and solvent regeneration through components such as absorption towers, desorption towers, pumps, valves, and pipelines. However, these devices have significant shortcomings. First, the desorption process consumes a large amount of heat energy for solvent regeneration, resulting in high energy costs. Second, the high-temperature waste heat in industrial waste gas is not effectively recovered and utilized, leading to energy waste. Third, scale easily forms on the inner wall of the absorption tower after long-term operation, causing a decrease in heat transfer efficiency and requiring frequent shutdowns for cleaning, which affects the continuous and stable operation of the equipment.

[0004] To address the aforementioned shortcomings, there is an urgent need to improve existing carbon dioxide capture and recovery devices, focusing on resolving issues such as high energy consumption, low waste heat utilization, and difficult equipment maintenance. By optimizing the heat recovery system and introducing automated cleaning mechanisms, the overall energy efficiency and operational stability of the devices can be significantly improved, thereby meeting the higher requirements of modern industry for the economic efficiency and reliability of carbon capture technology. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a carbon dioxide capture and recovery device that can recover waste heat, aiming to improve the problems of high energy consumption and low thermal efficiency of traditional carbon dioxide capture devices.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a carbon dioxide capture and recovery device capable of recovering waste heat, comprising a fixed frame, an absorption tower disposed on one side of the outer wall of the fixed frame, a desorption tower disposed on one side of the outer wall of the absorption tower, a support leg fixedly connected to the outer wall of the absorption tower, a support leg fixedly connected to the outer wall of the desorption tower, a guide pipe one, a guide pipe three, and a guide pipe four fixedly connected to the outer wall of the absorption tower, a waste heat recovery component disposed on the upper surface of the fixed frame, and a cleaning component disposed above the absorption tower; The waste heat recovery assembly includes a cylinder mounted on the upper surface of a fixed frame. A piston is fixedly connected to the output end of the cylinder. A reagent chamber is slidably connected to the outer wall of the piston. An injection pipe is fixedly connected to the inner wall of the reagent chamber. A solenoid valve is installed on the inner wall of the reagent chamber. A waste heat recovery device is fixedly connected to the outer wall of the injection pipe. An air inlet pipe is installed on the inner wall of the waste heat recovery device. A guide pipe is fixedly connected to the outer wall of the air inlet pipe. An absorbent transport assembly is installed on the inner wall of the waste heat recovery device.

[0007] Furthermore, the cleaning component includes a motor, which is positioned above the absorption tower. A telescopic rod is fixedly connected to the output end of the motor. A circular tube is rotatably connected to the outer wall of the telescopic rod. A cam is fixedly connected to the outer wall of the telescopic rod. A cam is slidably connected to the inner wall of the circular tube. A groove is formed on the inner wall of the circular tube. A rotating rod is fixedly connected to the outer wall of the cam. Two connecting rods are fixedly connected to the outer wall of the rotating rod. Scrapers are fixedly connected to the outer walls of the two connecting rods. Brushes are provided on the outer walls of the scrapers.

[0008] Furthermore, the absorbent transport assembly includes a second guide pipe, which is disposed on the inner wall of the waste heat recovery unit. A transport pump is disposed on the inner wall of the second guide pipe, and a liquid chamber is fixedly connected to the outer wall of the second guide pipe. A nozzle is disposed on the inner wall of the liquid chamber.

[0009] Furthermore, the outer walls of the guide pipe are fixedly connected to the inner wall of the desorption tower, the outer walls of the guide pipe are fixedly connected to the inner wall of the desorption tower, the outer wall of the liquid chamber is fixedly connected to the inner wall of the absorption tower, and the nozzle is installed on the inner wall of the absorption tower.

[0010] Furthermore, the outer wall of the waste heat recovery unit is fixedly connected to the other side of the outer wall of the absorption tower, and the cylinder is located on one side of the outer wall of the waste heat recovery unit.

[0011] Furthermore, the outer wall of the telescopic rod is slidably connected to the inner wall of the absorption tower, and the outer wall of the circular tube is fixedly connected to the inner wall of the absorption tower.

[0012] Furthermore, the outer wall of the rotating rod is slidably connected to the inner wall of the absorption tower.

[0013] Furthermore, the rotating rod is disposed on the inner wall of the absorption tower, the connecting rod is disposed on the inner wall of the absorption tower, and the scraper is disposed on the inner wall of the absorption tower.

[0014] This utility model has the following beneficial effects: 1. In this invention, the flow rate of the absorbent is controlled by a piston driven by a cylinder, and quantitative control is achieved by a solenoid valve. The absorbent recovers the waste heat of the high-temperature waste gas in the waste heat recovery unit, and after preheating, it is transported to the nozzle by a transport pump through a guide pipe. This solves the problems of high energy consumption and low thermal efficiency of traditional carbon dioxide capture devices, and achieves the effects of effectively recovering and utilizing the waste heat of industrial waste gas, reducing desorption energy consumption, and maintaining the heat transfer efficiency of the equipment.

[0015] 2. In this invention, a telescopic rod is driven to rotate by a motor. The sliding groove in the circular tube, in conjunction with a cam, enables the cam to move up and down and rotate within the tube, driving scrapers and brushes to remove scale from the inner wall of the absorption tower. This solves the problem of scale buildup on the inner wall of the equipment affecting heat transfer efficiency, achieving the goal of maintaining long-term, efficient, and stable operation of the equipment. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the carbon dioxide capture and recovery device for recovering waste heat proposed in this utility model. Figure 2 This is a schematic diagram of the waste heat recovery unit of the carbon dioxide capture and recovery device that can recover waste heat according to this utility model. Figure 3 This is a schematic diagram of the liquid injection pipe section of the carbon dioxide capture and recovery device for recoverable waste heat proposed in this utility model. Figure 4 This is a schematic diagram of the scraper section of the carbon dioxide capture and recovery device for recovering waste heat proposed in this utility model. Figure 5 This is a schematic diagram of the cam section of the carbon dioxide capture and recovery device for recovering waste heat proposed in this utility model.

[0017] Legend: 1. Fixed frame; 2. Air inlet pipe; 3. Flow guide pipe one; 4. Absorption tower; 5. Desorption tower; 6. Support leg; 7. Waste heat recovery unit; 8. Flow guide pipe two; 9. Transport pump; 10. Liquid chamber; 11. Flow guide pipe three; 12. Flow guide pipe four; 13. Cylinder; 14. Piston; 15. Liquid injection pipe; 16. Reagent chamber; 17. Solenoid valve; 18. Motor; 19. Telescopic rod; 20. Round tube; 21. Cam; 22. Rotating rod; 23. Connecting rod; 24. Scraper; 25. Brush; 26. Slide groove; 27. Nozzle. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Reference Figures 1-3This utility model provides an embodiment of a waste heat recovery carbon dioxide capture and recovery device, including a fixed frame 1. An absorption tower 4, the core reaction device, is installed on one side of the outer wall of the fixed frame 1. A chemical absorption process occurs inside the absorption tower, where the sprayed absorbent fully contacts and reacts with the carbon dioxide in the waste gas, thereby capturing CO2 from the gas. A desorption tower 5, the core regeneration device, is installed on one side of the outer wall of the absorption tower 4. It heats the rich liquid, causing CO2 to desorb from the absorbent, thus regenerating the absorbent and recovering high-purity CO2. Support legs 6 are fixedly connected to the outer wall of the absorption tower 4 and the desorption tower 5. Three guide pipes 11, 31, and 412 are fixedly connected to the outer wall of the absorption tower 4. These are all connecting pipes. Guide pipe 13 transports the pre-cooled waste gas from the waste heat recovery unit 7 to the absorption tower 4. Guide pipe 31 transports the carbon dioxide-enriched absorbent formed after absorbing CO2 from the absorption tower 4. The solution is transported to the desorption tower 5, and the guide pipe 12 transports the regenerated high-temperature "lean liquid" from the desorption tower 5 back to the absorption tower 4 for recycling. The upper surface of the fixed frame 1 is equipped with a waste heat recovery component, and the top of the absorption tower 4 is equipped with a cleaning component. The waste heat recovery assembly includes a cylinder 13, which is mounted on the upper surface of the fixed frame 1. A piston 14 is fixedly connected to the output end of the cylinder 13. The cylinder 13 and piston 14 form a pressurized delivery mechanism. The cylinder 13 acts as a power source, driving the piston 14 to move and providing flow pressure to the absorbent in the reagent chamber 16, pressing it into the inner wall of the waste heat recovery unit 7 for preheating. The reagent chamber 16 is slidably connected to the outer wall of the piston 14. It is a storage container used to store the cold absorbent to be replenished. An injection pipe 15 is fixedly connected to the inner wall of the reagent chamber 16, which is the absorbent injection pipeline. A solenoid valve 17 is installed on the inner wall of the reagent chamber 16, which is a flow control element. By precisely controlling its opening and closing, it regulates the flow of absorbent from the reagent chamber 16. The flow rate of absorbent to the inner wall of the waste heat recovery unit 7 is quantitatively replenished. The outer wall of the injection pipe 15 is fixedly connected to the waste heat recovery unit 7, which is the core heat exchange equipment. Its function is to allow the high-temperature waste gas to undergo preliminary heat exchange with the lower-temperature absorbent, recover the waste heat in the waste gas to preheat the absorbent, increase its temperature, and thus reduce the heating energy consumption of the subsequent desorption tower 5. The inner wall of the waste heat recovery unit 7 is provided with an air inlet pipe 2, which is the inlet channel for industrial waste gas (including CO2) and is responsible for introducing the high-temperature waste gas to be treated into the device. The outer wall of the air inlet pipe 2 is fixedly connected with a guide pipe 3, which is a connecting pipe that transports the pre-cooled waste gas from the waste heat recovery unit 7 to the absorption tower 4. The inner wall of the waste heat recovery unit 7 is provided with an absorbent transport assembly.

[0020] Specifically, cylinder 13 serves as the power source, and its output drives piston 14 to perform precise reciprocating motion, thereby generating a stable delivery pressure for the absorbent in reagent chamber 16. Under the coordinated control of solenoid valve 17, the system can achieve quantitative adjustment, ensuring that the absorbent is injected smoothly into the inner wall of waste heat recovery unit 7 at the optimal flow rate. Inside waste heat recovery unit 7, the low-temperature absorbent undergoes sufficient heat exchange with the high-temperature industrial waste gas passing through inlet pipe 2, effectively recovering the waste heat in the waste gas. After preheating, the absorbent flows out through guide pipe 2 8 and is pumped into liquid chamber 10 located at the top of absorption tower 4 by transport pump 9 for temporary storage. Finally, it is atomized and sprayed out through evenly distributed nozzles 27. This waste heat recovery system significantly increases the initial temperature of the absorbent, directly reducing the heating energy consumption required for subsequent regeneration of the rich liquid in desorption tower 5.

[0021] Reference Figure 1 , Figure 4 and Figure 5 The cleaning assembly includes a motor 18, which serves as the power source, providing rotational power for the entire assembly. The motor 18 is positioned above the absorption tower 4. A telescopic rod 19 is fixedly connected to the output end of the motor 18, acting as a drive shaft to transmit the rotational power of the motor 18 to the cam 21, causing it to rotate. A circular tube 20 is rotatably connected to the outer wall of the telescopic rod 19, and the cam 21 is fixedly connected to its outer wall. The cam 21 is slidably connected to the inner wall of the circular tube 20, which has a groove 26 on its inner wall. The circular tube 20 acts as a fixed outer sleeve, and its internal annular groove 26 cooperates with the cam 21, constraining and guiding the cam 21's movement trajectory, causing it to perform a combined up-and-down and rotational motion along a preset path. A rotating rod 22 is fixedly connected to the outer wall of the cam 21, and two connecting rods 23 are fixedly connected to the outer wall of the rotating rod 22. A scraper 24 is fixedly connected to the outer wall of the two connecting rods 23, and a brush 25 is provided on the outer wall of the scraper 24. The rotating rod 22 acts as a drive shaft, transmitting the rotational power of the cam 21... The combined motion is transmitted to the connecting rod 23, the scraper 24 and the brush 25, with the brush 25 used to clean up fine dust and residue.

[0022] Specifically, the motor 18 serves as the driving core, and its output shaft directly drives the telescopic rod 19 to rotate at a constant speed. Since the telescopic rod 19 is fixedly connected to the cam 21, the rotational power of the motor 18 is directly transmitted to the cam 21. The key point is that the inner wall of the fixedly installed round tube 20 is precisely machined with an annular groove 26. The groove 26 forms a motion fit with the outer edge of the cam 21. During the rotation, the cam 21 is constrained by the groove 26, and its movement is no longer a simple rotation, but a complex movement that combines up-and-down reciprocating displacement and its own rotation. The cam 21 then transmits this complex movement to the rigidly connected rotating rod 22, which in turn drives the connecting rod 23 fixed at the end of the rotating rod 22, as well as the scraper 24 and brush 25 installed on it, to move together. The brush 25 is used to clean fine dust and residue.

[0023] Reference Figures 1-5 The absorbent transport assembly includes a second guide pipe 8, which is installed on the inner wall of the waste heat recovery unit 7. The second guide pipe 8 serves as a connecting pipe, transporting the preheated absorbent from the waste heat recovery unit 7 to the liquid chamber 10. A transport pump 9 is installed on the inner wall of the second guide pipe 8, providing fluid power to ensure the preheated absorbent flows smoothly through the second guide pipe 8 and is pumped to the liquid chamber 10 at the top of the absorption tower 4. The outer wall of the second guide pipe 8 is fixedly connected to the liquid chamber 10, which serves as a storage and distribution container for temporarily storing the preheated absorbent and stably distributing it to the nozzles 27. The inner wall of the liquid chamber 10 is equipped with nozzles 27, located at the top of the absorption tower 4. Their function is to atomize or uniformly spray the absorbent, forming a large contact surface area to ensure sufficient and efficient contact with the rising exhaust gas, thereby improving CO2 absorption efficiency. The outer wall of the third guide pipe 11 is fixedly connected to the inner wall of the desorption tower 5. The outer wall of the guide pipe 12 is fixedly connected to the inner wall of the desorption tower 5, the outer wall of the liquid chamber 10 is fixedly connected to the inner wall of the absorption tower 4, the nozzle 27 is set on the inner wall of the absorption tower 4, the outer wall of the waste heat recovery unit 7 is fixedly connected to the other side of the outer wall of the absorption tower 4, the cylinder 13 is set on one side of the outer wall of the waste heat recovery unit 7, the outer wall of the telescopic rod 19 is slidably connected to the inner wall of the absorption tower 4, the outer wall of the round pipe 20 is fixedly connected to the inner wall of the absorption tower 4, the outer wall of the rotating rod 22 is slidably connected to the inner wall of the absorption tower 4, the rotating rod 22 is set on the inner wall of the absorption tower 4, the connecting rod 23 is set on the inner wall of the absorption tower 4, and the scraper 24 is set on the inner wall of the absorption tower 4.

[0024] Working Principle: When this equipment is needed, the various mechanisms are first placed in fixed positions using the mounting frame 1 and support legs 6. Then, the industrial waste gas containing carbon dioxide enters the waste heat recovery unit 7 through the inlet pipe 2, where it undergoes preliminary heat exchange with the absorbent flowing in the injection pipe 15. Subsequently, the gas enters the absorption tower 4 through the guide pipe 3, where it comes into full contact with the absorbent sprayed through the nozzles 27. The carbon dioxide is chemically absorbed, and the purified gas is discharged. The absorbent enriched with carbon dioxide enters the desorption tower 5 through the guide pipe 11 for heating and regeneration. The lean liquid is returned to the absorption tower 4 for recycling via the guide pipe 12. When waste heat recovery is required, the cylinder 13 drives the piston 14 to move, controlling the absorbent in the reagent chamber 16 to flow into the waste heat recovery unit 7 through the injection pipe 15. The solenoid valve 17 can control the quantitative absorbent to enter the waste heat recovery unit 7 from the reagent chamber 16. The absorbent recovers the waste heat of the high temperature waste gas in the inlet pipe 2. The preheated absorbent is transported to the liquid chamber 10 by the transport pump 9 via the guide pipe 28, and finally sprayed out through the nozzle 27, thereby reducing the heating energy consumption of the desorption tower 5. The cleaning component drives the telescopic rod 19 to rotate via the motor 18. The telescopic rod 19 is fixedly connected to the cam 21, so the cam 21 also rotates synchronously. Since the inner wall of the circular tube 20 has an annular groove 26, the annular groove 26 cooperates with the cam 21 to realize the cam 21 to move up and down a limited distance and rotate inside the circular tube 20. In turn, the cam 21 drives the scraper 24 and brush 25 on the rotating rod 22 and connecting rod 23 to rotate, automatically removing the dirt from the inner wall of the absorption tower 4 and maintaining the heat transfer efficiency.

[0025] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A waste heat recovery carbon dioxide capture and recovery device, comprising a fixed frame (1), characterized in that: An absorption tower (4) is provided on one side of the outer wall of the fixed frame (1), and a desorption tower (5) is provided on one side of the outer wall of the absorption tower (4). A support leg (6) is fixedly connected to the outer wall of the absorption tower (4), and a support leg (6) is fixedly connected to the outer wall of the desorption tower (5). A flow guide pipe 1 (3), a flow guide pipe 3 (11), and a flow guide pipe 4 (12) are fixedly connected to the outer wall of the absorption tower (4). A waste heat recovery component is provided on the upper surface of the fixed frame (1), and a cleaning component is provided above the absorption tower (4). The waste heat recovery assembly includes a cylinder (13), which is mounted on the upper surface of the fixed frame (1). A piston (14) is fixedly connected to the output end of the cylinder (13). A reagent chamber (16) is slidably connected to the outer wall of the piston (14). An injection pipe (15) is fixedly connected to the inner wall of the reagent chamber (16). A solenoid valve (17) is provided on the inner wall of the reagent chamber (16). A waste heat recovery device (7) is fixedly connected to the outer wall of the injection pipe (15). An air inlet pipe (2) is provided on the inner wall of the waste heat recovery device (7). A guide pipe (3) is fixedly connected to the outer wall of the air inlet pipe (2). An absorbent transport assembly is provided on the inner wall of the waste heat recovery device (7).

2. The carbon dioxide capture and recovery device with recoverable waste heat according to claim 1, characterized in that: The cleaning assembly includes a motor (18) which is located above the absorption tower (4). A telescopic rod (19) is fixedly connected to the output end of the motor (18). A round tube (20) is rotatably connected to the outer wall of the telescopic rod (19). A cam (21) is fixedly connected to the outer wall of the telescopic rod (19). A cam (21) is slidably connected to the inner wall of the round tube (20). A groove (26) is provided on the inner wall of the round tube (20). A rotating rod (22) is fixedly connected to the outer wall of the cam (21). Two connecting rods (23) are fixedly connected to the outer wall of the rotating rod (22). A scraper (24) is fixedly connected to the outer wall of the two connecting rods (23). A brush (25) is provided on the outer wall of the scraper (24).

3. The carbon dioxide capture and recovery device for recoverable waste heat according to claim 1, characterized in that: The absorbent transport assembly includes a second guide pipe (8), which is disposed on the inner wall of the waste heat recovery unit (7). A transport pump (9) is disposed on the inner wall of the second guide pipe (8). A liquid chamber (10) is fixedly connected to the outer wall of the second guide pipe (8). A nozzle (27) is disposed on the inner wall of the liquid chamber (10).

4. The carbon dioxide capture and recovery device for recoverable waste heat according to claim 3, characterized in that: The outer wall of the third guide pipe (11) is fixedly connected to the inner wall of the desorption tower (5), the outer wall of the fourth guide pipe (12) is fixedly connected to the inner wall of the desorption tower (5), the outer wall of the liquid chamber (10) is fixedly connected to the inner wall of the absorption tower (4), and the nozzle (27) is installed on the inner wall of the absorption tower (4).

5. The carbon dioxide capture and recovery device for recovering waste heat according to claim 1, characterized in that: The outer wall of the waste heat recovery unit (7) is fixedly connected to the other side of the outer wall of the absorption tower (4), and the cylinder (13) is located on one side of the outer wall of the waste heat recovery unit (7).

6. The carbon dioxide capture and recovery device for recoverable waste heat according to claim 2, characterized in that: The outer wall of the telescopic rod (19) is slidably connected to the inner wall of the absorption tower (4), and the outer wall of the circular tube (20) is fixedly connected to the inner wall of the absorption tower (4).

7. The carbon dioxide capture and recovery device for recovering waste heat according to claim 2, characterized in that: The outer wall of the rotating rod (22) is slidably connected to the inner wall of the absorption tower (4).

8. The carbon dioxide capture and recovery device for recovering waste heat according to claim 2, characterized in that: The rotating rod (22) is installed on the inner wall of the absorption tower (4), the connecting rod (23) is installed on the inner wall of the absorption tower (4), and the scraper (24) is installed on the inner wall of the absorption tower (4).

Images