A carbon dioxide removal system
By combining a condenser, a dryer filter, and an adsorption tower into a carbon dioxide removal system, the problems of high energy consumption and large regeneration gas loss in existing technologies are solved, achieving efficient and low-energy removal of carbon dioxide and moisture, and obtaining high-quality compressed air.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI APUREDA IND CO LTD
- Filing Date
- 2025-06-10
- Publication Date
- 2026-06-02
AI Technical Summary
Existing compressed air drying technologies suffer from high energy consumption, large losses of regeneration air, and are unable to meet the requirements for high dryness and carbon dioxide removal, especially in industrial production where the demand for high-quality compressed air remains unmet.
A carbon dioxide removal system is adopted, which combines a condenser, a dryer filter and an adsorption tower. Through the combination of a refrigeration compressor and a heat exchanger, efficient removal of carbon dioxide and moisture is achieved. Carbon dioxide is continuously removed by alternating operation of two adsorption towers, and the gas is pretreated by a refrigeration system to improve adsorption efficiency.
It achieves efficient and low-energy carbon dioxide removal and moisture removal, obtaining high-quality compressed air with low dew point and low carbon dioxide concentration, meeting the industrial production demand for high-quality compressed air.
Smart Images
Figure CN224308100U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of gas treatment system technology, and in particular to a carbon dioxide removal system. Background Technology
[0002] With the increase in industrial production and human activities, the concentration of carbon dioxide in the atmosphere is constantly rising, causing serious impacts on the environment. Compressed air systems are widely used as an important power source in industrial production processes; however, impurities such as moisture and carbon dioxide in compressed air can adversely affect production equipment and product quality. Therefore, effectively drying compressed air and removing carbon dioxide has become a crucial step in industrial production.
[0003] Currently, compressed air drying technology mainly includes two methods: refrigeration drying and adsorption drying. Condensers use a refrigeration system to condense and separate moisture from compressed air, offering advantages such as low energy consumption and no air loss. However, their dew point temperature is typically only 2-10℃, which cannot meet the needs of some industrial applications requiring high dryness. Adsorption dryers utilize adsorbents to adsorb moisture from compressed air, achieving dew point temperatures of -40℃ or even lower. However, they suffer from drawbacks such as high regeneration air loss and high energy consumption. Therefore, there is an urgent need for a compressed air treatment system that is simple in structure, low in energy consumption, and possesses both good drying effect and carbon dioxide removal capability to meet the demand for high-quality compressed air in industrial production. Utility Model Content
[0004] The purpose of this invention is to provide a carbon dioxide removal system to solve the above-mentioned technical problems.
[0005] The technical solution adopted in this utility model is as follows:
[0006] A carbon dioxide removal system includes a first adsorption tower, a second adsorption tower, a refrigeration compressor, a dryer filter, a condenser, a heat exchanger, an evaporator, and a base. The first adsorption tower and the second adsorption tower are mounted on the base. A first outlet of the heat exchanger is connected to the evaporator via a first pipe. The evaporator is connected to both the first and second adsorption towers via a second pipe. The refrigeration compressor is connected to the condenser via a third pipe. The condenser is connected to the dryer filter via a fourth pipe. The dryer filter is connected to the evaporator via a fifth pipe. A humid air inlet is provided on the heat exchanger and is connected to the compressor.
[0007] Preferably, the system also includes a vaporizer, wherein the refrigeration compressor is connected to the evaporator via a sixth pipe, and the vaporizer is provided on the sixth pipe.
[0008] Preferably, a thermal expansion valve is also included, and the thermal expansion valve is provided on the fifth pipeline.
[0009] Preferably, a bypass pipeline is also included, which is connected to the third pipeline, and a hot gas bypass valve is provided on the bypass pipeline.
[0010] Preferably, the system also includes a water vapor separator and a drainer, wherein the water vapor separator is installed on the second pipeline and the drainer is installed at the outlet of the water vapor separator.
[0011] Preferably, the system also includes a first branch and a second branch, wherein the first branch connects the second pipeline and the first adsorption tower, the second branch connects the second adsorption tower and the second pipeline, a first electrically controlled valve is provided on the first branch, and a second electrically controlled valve is provided on the second branch.
[0012] As a further preferred embodiment, it also includes a branch pipeline, which connects the first branch and the second branch. The branch pipeline is equipped with a third solenoid valve and a fourth solenoid valve, and an exhaust pipe is provided between the third solenoid valve and the fourth solenoid valve.
[0013] Preferably, the system also includes a third branch, a fourth branch, and a seventh pipeline. The third branch connects the first adsorption tower and the seventh pipeline, the fourth branch connects the second adsorption tower and the seventh pipeline, the third branch is equipped with a fifth outlet valve, the fourth branch is equipped with a sixth outlet valve, and the seventh pipeline is connected to the heat exchanger.
[0014] As a further preferred embodiment, the system also includes a second branch pipe, an eighth pipe, and an outlet pipe. The second branch pipe connects to the third branch pipe and the fourth branch pipe. The outlet pipe is connected to the second outlet of the heat exchanger. The eighth pipe connects to the second branch pipe and the outlet pipe.
[0015] The above technical solution has the following advantages or beneficial effects:
[0016] In this invention, the condenser, the dryer filter, and the condenser and adsorption tower are rationally combined through a compressed air pipeline and skid-mounted on a base, thus integrating the advantages of both refrigerated dryers and desiccant dryers. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the carbon dioxide removal system in this utility model;
[0018] Figure 2 This is a front view of the carbon dioxide removal system in this utility model;
[0019] Figure 3This is a side view of the carbon dioxide removal system in this utility model;
[0020] Figure 4 This is a top view of the carbon dioxide removal system in this utility model.
[0021] In the diagram: 1. First adsorption tower; 2. Second adsorption tower; 3. Refrigeration compressor; 4. Dryer filter; 5. Condenser; 6. Heat exchanger; 7. Evaporator; 8. Base; 9. First pipeline; 10. Second pipeline; 11. Third pipeline; 12. Fourth pipeline; 13. Fifth pipeline; 14. Sixth pipeline; 15. Seventh pipeline; 16. Eighth pipeline; 17. Vaporizer; 18. Thermal expansion valve; 19. Bypass pipeline; 20. Hot gas bypass valve; 21. 21. Water-vapor separator; 22. Drainer; 23. First branch; 24. Second branch; 25. First solenoid valve; 26. Second solenoid valve; 27. First branch pipe; 28. Third solenoid valve; 29. Fourth solenoid valve; 30. Exhaust pipe; 31. Third branch; 32. Fourth branch; 33. Fifth exhaust valve; 34. Sixth exhaust valve; 35. Second branch pipe; 36. Exhaust pipe; 37. Heater; 38. Seventh regeneration valve; 39. Eighth regeneration valve. Detailed Implementation
[0022] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0023] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0025] Figure 1 This is a schematic diagram of the carbon dioxide removal system in this utility model; Figure 2 This is a front view of the carbon dioxide removal system in this utility model; Figure 3 This is a side view of the carbon dioxide removal system in this utility model; Figure 4 This is a top view of the carbon dioxide removal system of this utility model. Please see below. Figures 1 to 4 The diagram illustrates a preferred embodiment of a carbon dioxide removal system, comprising a first adsorption tower 1, a second adsorption tower 2, a refrigeration compressor 3, a dryer filter 4, a condenser 5, a heat exchanger 6, an evaporator 7, and a base 8. The first adsorption tower 1 and the second adsorption tower 2 are mounted on the base 8. The first outlet of the heat exchanger 6 is connected to the evaporator 7 via a first pipe 9. The evaporator 7 is connected to the first adsorption tower 1 and the second adsorption tower 2 via a second pipe 10. The refrigeration compressor 3 is connected to the condenser 5 via a third pipe 11. The condenser 5 is connected to the dryer filter 4 via a fourth pipe 12. The dryer filter 4 is connected to the evaporator 7 via a fifth pipe 13. The heat exchanger 6 is provided with a humid air inlet, which is connected to the compressor. The high-temperature, high-humidity compressed air generated by the compressor first undergoes heat exchange in heat exchanger 6 to lower its temperature. Then, it enters evaporator 7 to be further cooled to about 2°C. After passing through a steam-water separator, most of the gaseous moisture is converted into liquid water and discharged. The compressed air with very low moisture content enters the first adsorption tower 1 for further drying and dehumidification. Then, the low-temperature dried compressed air re-enters heat exchanger 6 to cool the high-temperature, high-humidity air generated by the compressor, while its own temperature rises to prevent condensation outside the pipeline. The adsorbents used in the first adsorption tower 1 and the second adsorption tower 2 have a strong CO2 adsorption capacity while removing water, thereby achieving the optimal economic operating point and obtaining high-quality finished gas with low dew point and low CO2 concentration.
[0026] The evaporator 7 cools down the high-temperature and high-humidity compressed air inside, and the resulting liquid enters the vaporizer 17 to vaporize and form gas. Then, the gas enters the refrigeration compressor 3 to be cooled down and form refrigerant. The high-temperature gas is cooled down and then enters the condenser 5 for further cooling and drying. Then, it is dried and filtered by the dryer filter 4, and finally enters the evaporator 7. Then, it enters the first adsorption tower 1 or the second adsorption tower 2 through the second pipeline 10.
[0027] Furthermore, as a preferred embodiment, a vaporizer 17 is also included. The refrigeration compressor 3 is connected to the evaporator 7 via a sixth pipe 14, and the vaporizer 17 is installed on the sixth pipe 14. The vaporizer 17 is used to convert the liquid formed by cooling the evaporator 7 into a gaseous state. A circulation system is formed between the vaporizer 17, the refrigeration compressor 3, the condenser 5, the dryer filter 4, and the evaporator 7. The gas cooled by the refrigeration compressor 3 enters the evaporator 7 and mixes with the high-temperature, high-humidity compressed air, further improving the system's heat exchange efficiency.
[0028] Furthermore, as a preferred embodiment, a thermostatic expansion valve 18 is also included, which is installed on the fifth pipeline 13. The thermostatic expansion valve 18 is used to control the flow rate of the refrigerant, so that the refrigerant expands and depressurizes before entering the evaporator 7, thereby achieving a cooling effect.
[0029] Furthermore, as a preferred embodiment, a bypass line 19 is also included, which is connected to the third line 11. A hot gas bypass valve 20 is provided on the bypass line 19. The hot gas bypass valve 20 can directly introduce high-temperature and high-pressure refrigerant gas into the low-pressure side when the system needs it, for the purpose of regulating system pressure and temperature.
[0030] Furthermore, as a preferred embodiment, it also includes a water vapor separator 21 and a drain 22. The water vapor separator 21 is installed on the second pipeline 10, and the drain 22 is installed at the outlet of the water vapor separator 21. The water vapor separator 21 is used to separate moisture from the gas, and the drain 22 is used to discharge the separated moisture, ensuring that the dryness of the gas entering the adsorption tower meets the requirements.
[0031] Furthermore, as a preferred embodiment, it also includes a first branch 23 and a second branch 24. The first branch 23 connects the second pipeline 10 and the first adsorption tower 1, and the second branch 24 connects the second adsorption tower 2 and the second pipeline 10. A first electrically controlled valve 25 is installed on the first branch 23, and a second electrically controlled valve 26 is installed on the second branch 24. The first electrically controlled valve 25 and the second electrically controlled valve 26 are used to control the flow rate of gas entering the corresponding adsorption tower.
[0032] Furthermore, as a preferred embodiment, a branch pipeline is also included, connecting the first branch 23 and the second branch 24. A third electrically controlled valve 28 and a fourth electrically controlled valve 29 are installed on the branch pipeline, and an exhaust pipe 30 is installed between the third electrically controlled valve 28 and the fourth electrically controlled valve 29. The branch pipeline is used for gas exchange between the two adsorption towers, and the exhaust pipe 30 is used to discharge the humid air containing carbon dioxide generated during the regeneration process.
[0033] Furthermore, as a preferred embodiment, it also includes a third branch 31, a fourth branch 32, and a seventh pipe 15. The third branch 31 connects the first adsorption tower 1 and the seventh pipe 15, the fourth branch 32 connects the second adsorption tower 2 and the seventh pipe 15, a fifth outlet valve 33 is provided on the third branch 31, a sixth outlet valve 34 is provided on the fourth branch 32, and the seventh pipe 15 connects to the heat exchanger 6. The third branch 31 and the fourth branch 32 are used to introduce the gas treated by the adsorption towers into the heat exchanger 6 for heat exchange.
[0034] Furthermore, as a preferred embodiment, it also includes a second branch pipe 35, an eighth pipe 16, and an outlet pipe 36. The second branch pipe 35 connects to the third branch pipe 31 and the fourth branch pipe 32. The outlet pipe 36 connects to the second outlet of the heat exchanger 6. The eighth pipe 16 connects the second branch pipe 35 and the outlet pipe 36, and a heater 37 is installed on the eighth pipe 16. The second branch pipe 35 is used to connect the outlet gases of the two adsorption towers, and the outlet pipe 36 is used to output the treated gas. A seventh regeneration valve 38 and an eighth regeneration valve 39 are installed on the second branch pipe 35.
[0035] In operation, humid air is compressed by the compressor and enters the heat exchanger 6, where it exchanges heat with the treated gas to lower its temperature. The heat-exchanged gas then enters the evaporator 7 through the first pipe 9 for further cooling. The cooled gas then passes through the second pipe 10 and the water-vapor separator 21 to remove moisture. The dried gas then enters the first adsorption tower 1 or the second adsorption tower 2 through the first branch 23 or the second branch 24 for carbon dioxide adsorption. During the cooling process in the evaporator 7, the water produced enters the vaporizer 17 through the sixth pipe 14 for vaporization, and then enters the refrigeration compressor 3 for further cooling. The refrigeration compressor 3 compresses the refrigerant into a high-temperature, high-pressure gas, which then enters the condenser 5 through the third pipe 11. In the condenser 5, the moisture in the gas condenses, and the refrigerant is cooled and dried. Finally, the refrigerant enters the dryer filter 4 through the fourth pipe 12 to remove impurities and moisture. The refrigerant at the outlet of the dryer filter 4 is depressurized by the thermostatic expansion valve 18 on the fifth pipeline 13 and then enters the evaporator 7, where it absorbs heat and cools the gas to be treated.
[0036] When the first adsorption tower 1 becomes saturated, the first solenoid valve 25 closes and the second solenoid valve 26 opens, allowing the gas to be adsorbed by the second adsorption tower 2. Simultaneously, the sixth outlet valve 34 and the third solenoid valve 28 open, while the fifth outlet valve 33 closes. A portion of the purified gas passes through the seventh pipe 15 into the heat exchanger 6 to exchange heat with the high-temperature, high-humidity compressed air. The treated gas is then discharged from the system through the second outlet of the heat exchanger 6 and the outlet pipe 36. A portion of the gas passes through the eighth pipe 16 into the heater 37 for heating, and then into the second branch pipe 35. Meanwhile, the seventh regeneration valve 38 opens and the eighth regeneration valve 39 closes. Finally, a portion of the gas returns to the first adsorption tower 1 to dry and regenerate the adsorbent. The resulting carbon dioxide gas is discharged from the exhaust pipe 30. When the second adsorption tower 2 needs to be dried and regenerated, the sixth outlet valve 34 needs to be closed, the fifth outlet valve 33 and the fourth electric control valve 29 need to be opened, and the gas will eventually enter the heater 37 through the eighth pipeline 16 for heating, and then enter the second branch pipeline 35. The eighth regeneration valve 39 is opened and the seventh regeneration valve 38 is closed. Then, part of the gas will enter the second adsorption tower 2 to dry and regenerate the adsorbent in the second adsorption tower 2.
[0037] The carbon dioxide removal system in this embodiment achieves continuous carbon dioxide removal by alternating operation of two adsorption towers. Simultaneously, a refrigeration system pre-treats the gas to remove moisture, improving adsorption efficiency. The connections between the system components are logical, the process flow is clear, and it can operate efficiently and stably. An external controller is provided in this embodiment to connect to the various components of the system, facilitating the control of their operation.
[0038] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A carbon dioxide removal system, characterized in that, The system includes a first adsorption tower, a second adsorption tower, a refrigeration compressor, a dryer filter, a condenser, a heat exchanger, an evaporator, and a base. The first adsorption tower and the second adsorption tower are mounted on the base. The first outlet of the heat exchanger is connected to the evaporator via a first pipe. The evaporator is connected to the first adsorption tower and the second adsorption tower via a second pipe. The refrigeration compressor is connected to the condenser via a third pipe. The condenser is connected to the dryer filter via a fourth pipe. The dryer filter is connected to the evaporator via a fifth pipe. The heat exchanger has a humid air inlet, which is connected to the compressor.
2. The carbon dioxide removal system as described in claim 1, characterized in that, It also includes a vaporizer, and the refrigeration compressor is connected to the evaporator through a sixth pipeline, on which the vaporizer is installed.
3. The carbon dioxide removal system as described in claim 1, characterized in that, It also includes a thermal expansion valve, which is installed on the fifth pipeline.
4. The carbon dioxide removal system as described in claim 1, characterized in that, It also includes a bypass pipeline, which is connected to the third pipeline, and a hot gas bypass valve is provided on the bypass pipeline.
5. The carbon dioxide removal system as described in claim 1, characterized in that, It also includes a water vapor separator and a drainer, wherein the water vapor separator is installed on the second pipeline and the drainer is installed at the outlet of the water vapor separator.
6. The carbon dioxide removal system as described in claim 1, characterized in that, It also includes a first branch and a second branch. The first branch connects the second pipeline and the first adsorption tower, and the second branch connects the second adsorption tower and the second pipeline. A first electrically controlled valve is installed on the first branch, and a second electrically controlled valve is installed on the second branch.
7. The carbon dioxide removal system as described in claim 6, characterized in that, It also includes a first branch pipeline, which connects the first branch and the second branch. The branch pipeline is equipped with a third solenoid valve and a fourth solenoid valve, and an exhaust pipe is provided between the third solenoid valve and the fourth solenoid valve.
8. The carbon dioxide removal system as described in claim 1, characterized in that, It also includes a third branch, a fourth branch, and a seventh pipeline. The third branch connects the first adsorption tower and the seventh pipeline, the fourth branch connects the second adsorption tower and the seventh pipeline, the third branch is equipped with a fifth outlet valve, the fourth branch is equipped with a sixth outlet valve, and the seventh pipeline is connected to the heat exchanger.
9. The carbon dioxide removal system as described in claim 8, characterized in that, It also includes a second branch pipe, an eighth pipe, and an outlet pipe. The second branch pipe connects to the third branch pipe and the fourth branch pipe. The outlet pipe is connected to the second outlet of the heat exchanger. The eighth pipe connects to the second branch pipe and the outlet pipe.