A rotary wheel type exhaust gas treatment solvent recovery device
Patent Information
- Application Number
- CN202522609475.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-09
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-12-09
AI Technical Summary
现有的处理方法通常是采用活性炭过滤处理废气或者通过一级转轮冷凝回收溶剂，但活性炭过滤处理废气难以完全将溶剂析出，而一级转轮冷凝回收过程中，容易出现气体处理不干净，转轮脱附过程中产生的高温也容易影响吸附过程，导致处理效果越来越差
[0010]本实用新型的有益效果在于，本实用新型通过第一冷却段对废气进行第一次冷却后再进入第一转轮吸附段内进行吸附处理，使得废气第一次吸附处理过程中进行降温，提高吸附效果，经第一次吸附完输出的废气再次在第二冷却段进行二次冷却，防止废气在第一转轮吸附段内被升温而影响二次吸附，从而提高废气在第二转轮吸附段内的吸附效果，使得废气中的大量有机废气快速过滤处理，经二次吸附后的气体中存在的有机溶剂进入溶剂回收段内的第三蒸发器进行快速降温，使得有机溶剂从气体中析出并进入溶剂回收槽内，从而方便回收处理，整个过程形成二次冷凝气体处理，提高废气的处理效率以及效果，而且经二次冷凝的气体可以作为预冷处理，可以快速提高最后降温速度，可有效快速析出最后的有机溶剂。
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Figure CN224912083U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of waste gas treatment, specifically, a rotary waste gas treatment solvent recovery device. Background Technology
[0002] The printing industry typically generates printing waste gas during production activities. This waste gas often contains organic solvents, resulting in a high concentration of organic waste gases and solvents that are difficult to adsorb. Existing treatment methods usually involve activated carbon filtration or solvent recovery via a primary rotor condenser. However, activated carbon filtration often fails to completely remove the solvent, and the primary rotor condenser process is prone to incomplete gas treatment. Furthermore, the high temperatures generated during rotor desorption can negatively impact the adsorption process, leading to progressively worse treatment efficiency. Utility Model Content
[0003] In order to overcome the defects of the existing technology, this utility model provides a rotary waste gas treatment solvent recovery device to solve the problems in the existing technology.
[0004] The technical solution adopted by this utility model to solve its technical problem is: a rotary waste gas treatment solvent recovery device, including a body, an air inlet is provided at one end of the body, and a first cooling section, a first rotary adsorption section, a second cooling section, a second rotary adsorption section and a solvent recovery section are arranged in sequence inside the body, the air inlet is connected to the first cooling section, and an exhaust hole is provided on the side of the solvent recovery section. A first evaporator is provided in the first cooling section, and a second evaporator is provided in the second cooling section; The solvent recovery section is equipped with a solvent recovery tank, and the solvent recovery tank is equipped with a third evaporator.
[0005] In the above-mentioned rotary waste gas treatment solvent recovery device, the first evaporator and the second evaporator are both water-cooled evaporators. The first evaporator is provided with a first cold water inlet and a first cold water outlet, and the second evaporator is provided with a second cold water inlet and a second cold water outlet.
[0006] In the aforementioned rotary waste gas treatment solvent recovery device, a first adsorption rotor is provided in the first rotary adsorption section, a second adsorption rotor is provided in the second rotary adsorption section, and a hollow section is provided between the first rotary adsorption section and the second cooling section. The hollow section is connected to the second cooling section through an air inlet pipe.
[0007] In the aforementioned rotary waste gas treatment solvent recovery device, both the first adsorption rotor and the second adsorption rotor include a rotor body. Both sides of the rotor body are provided with interconnected adsorption areas and desorption areas. A first separator box is provided on the desorption area of the rotor body at the downstream end of the gas flow, and a hot air inlet is provided on the first separator box. A second separator box is provided on the desorption area of the rotor body at the upstream end of the gas flow, and a hot air outlet is provided on the second separator box.
[0008] In the aforementioned rotary waste gas treatment solvent recovery device, the solvent recovery section is provided with an exhaust chamber and a condenser chamber, both of which are independent chambers. The condenser chamber is located above the exhaust chamber, and a condenser, a compressor, and an expansion valve are provided inside the condenser chamber. The third evaporator is connected to the condenser, the compressor, and the expansion valve.
[0009] In the aforementioned rotary waste gas treatment solvent recovery device, the upper end of the condenser chamber is provided with heat dissipation holes.
[0010] The beneficial effects of this invention are as follows: The waste gas is cooled in the first cooling section before entering the first rotary adsorption section for adsorption treatment. This cooling process improves the adsorption effect. The waste gas, after the first adsorption, is then cooled again in the second cooling section to prevent overheating in the first rotary adsorption section from affecting the second adsorption. This further enhances the adsorption effect in the second rotary adsorption section, allowing for rapid filtration of large amounts of organic waste gas. The organic solvents remaining in the gas after the second adsorption enter the third evaporator in the solvent recovery section for rapid cooling, causing them to precipitate from the gas and enter the solvent recovery tank for easy recycling. This entire process constitutes a secondary condensation gas treatment, improving the treatment efficiency and effectiveness of the waste gas. Furthermore, the gas condensed twice can be used for pre-cooling, rapidly increasing the final cooling rate and effectively and quickly precipitating the final organic solvents. Attached Figure Description
[0011] Figure 1 This is a three-dimensional structural diagram of the rotary waste gas treatment solvent recovery device in this embodiment.
[0012] Figure 2 This is a schematic diagram of the internal structure of the rotary waste gas treatment solvent recovery device in this embodiment.
[0013] Figure 3 This is a three-dimensional structural diagram of the first adsorption wheel in this embodiment.
[0014] Figure 4 This is a three-dimensional structural diagram of the third evaporator and solvent recovery tank in this embodiment.
[0015] In the diagram: 1. Body; 2. Air inlet; 3. First cooling section; 4. First rotor adsorption section; 5. Second cooling section; 6. Second rotor adsorption section; 7. Solvent recovery section; 8. First evaporator; 9. First cold water inlet; 10. First cold water outlet; 11. Rotor body; 12. Adsorption area; 13. Desorption area; 14. Hot air inlet; 15. First separator box; 16. Second separator box; 17. Hot air outlet; 18. Second evaporator; 19. Hollow section; 20. Air inlet pipe; 21. Second cold water inlet; 22. Second cold water outlet; 23. Second adsorption rotor; 24. Third evaporator; 25. Condenser chamber; 26. Condenser; 27. Solvent recovery tank; 28. Heat dissipation hole. Detailed Implementation
[0016] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.
[0017] Combination Figures 1 to 4 The rotary waste gas treatment solvent recovery device shown includes a body 1, with an air inlet 2 at one end. The body 1 contains, in sequence, a first cooling section 3, a first rotary adsorption section 4, a second cooling section 5, a second rotary adsorption section 6, and a solvent recovery section 7. The air inlet 2 is connected to the first cooling section 3, and an exhaust port is provided on the side of the solvent recovery section 7. A first evaporator 8 is installed in the first cooling section 3, and a second evaporator 18 is installed in the second cooling section 5. A solvent recovery tank 27 is installed in the solvent recovery section 7, and a third evaporator 24 is installed in the solvent recovery tank 27.
[0018] The rotary waste gas treatment solvent recovery device of this embodiment is a horizontal device, with an air inlet 2 for the entry of waste gas and an exhaust port for the discharge of treated gas.
[0019] In this embodiment, the waste gas is first cooled in the first cooling section 3 before entering the first rotary adsorption section 4 for adsorption treatment. This cooling process during the first adsorption treatment improves the adsorption effect. After the first adsorption, the waste gas is cooled again in the second cooling section 5 to prevent it from being heated in the first rotary adsorption section 4 and affecting the second adsorption. This improves the adsorption effect in the second rotary adsorption section 6, allowing for rapid filtration of a large amount of organic waste gas. The organic solvents in the gas after the second adsorption enter the third evaporator 24 in the solvent recovery section 7 for rapid cooling. This causes the organic solvents to precipitate from the gas and enter the solvent recovery tank 27 for easy recovery. The entire process forms a secondary condensation gas treatment, improving the treatment efficiency and effect of the waste gas. Moreover, the gas condensed twice can be used as a pre-cooling treatment, which can quickly increase the final cooling rate and effectively and rapidly precipitate the final organic solvents.
[0020] Specifically, in this embodiment, both the first evaporator 8 and the second evaporator 18 are water-cooled evaporators. Water-cooled evaporators are existing technology, and those skilled in the art should be able to understand their internal structure and principle, which will not be elaborated here.
[0021] The first evaporator 8 is provided with a first cold water inlet 9 and a first cold water outlet 10, and the second evaporator 18 is provided with a second cold water inlet 21 and a second cold water outlet 22. The first cold water inlet 9 and the second cold water inlet 21, the first cold water outlet 10 and the second cold water outlet 22 are all connected to an external cooling tower or chiller, so that the first evaporator 8 and the second evaporator 18 form a cold source, so that the exhaust gas is cooled down after passing through the first evaporator 8 and the second evaporator 18.
[0022] In this embodiment, a first adsorption rotor is provided in the first adsorption section 4, and a second adsorption rotor 23 is provided in the second adsorption section 6. A hollow section 19 is provided between the first adsorption section 4 and the second cooling section 5. The hollow section 19 is connected to the second cooling section 5 through an air inlet pipe 20. This allows the exhaust gas to be concentrated in the hollow section 19 after being adsorbed by the first adsorption rotor. The exhaust gas after primary treatment is then discharged into the second cooling section 5 through the air inlet pipe 20 for secondary cooling, thereby improving the secondary cooling effect of the exhaust gas and enhancing the secondary adsorption effect.
[0023] It is worth noting that the size of the second adsorption rotor 23 in this embodiment is smaller than that of the first adsorption rotor. Since the harmful substances in the waste gas after adsorption by the first adsorption rotor have been reduced, reducing the size of the second adsorption rotor 23 can reduce equipment costs. The structures of the first adsorption rotor and the second adsorption rotor 23 are the same. Taking the structure of the first adsorption rotor as an example, it includes a rotor body 11. Both sides of the rotor body 11 are provided with interconnected adsorption areas 12 and desorption areas 13. The first adsorption rotor 23 is located on the desorption area 13 at the downstream end of the gas flow of the rotor body 11. A first separator 15 is provided with a hot air inlet 14. A second separator 16 is provided on the desorption zone 13 at the upstream end of the gas flow of the rotor body 11. A hot air outlet 17 is provided on the second separator 16. The cooled waste gas is introduced into the adsorption zone 12 for adsorption. When the rotor body 11 is saturated with adsorption, it can rotate to the desorption zone 13. The hot air inlet 14 is connected to an external hot air system to introduce hot air into the desorption zone 13, which heats and desorbs the rotor body 11 in the desorption zone 13 and discharges it from the hot air outlet 17 for subsequent processing.
[0024] It is worth noting that the rotating wheel body 11 is rotatable, and its rotation structure and principle are existing technologies, which will not be described in detail here.
[0025] In this embodiment, the solvent recovery section 7 is provided with an exhaust chamber and a condenser chamber 25, both of which are independent chambers. The condenser chamber 25 is located above the exhaust chamber. The condenser chamber 25 is provided with a condenser 26, a compressor, and an expansion valve. The third evaporator 24 is connected to the condenser 26, the compressor, and the expansion valve. After the gas is adsorbed by the second adsorption wheel 23, it is rapidly cooled by the third evaporator 24 and then discharged from the exhaust port on the side of the exhaust chamber. Since the third evaporator 24 is not water-cooled, but uses the structure of the condenser 26, the compressor, and the expansion valve, the temperature of the third evaporator 24 is lower, which facilitates the low-temperature precipitation of organic solvents. Moreover, under the action of the first evaporator 8 and the second evaporator 18, the gas has been pre-cooled, which can effectively reduce the power and working time of the compressor, making the equipment more energy-efficient.
[0026] It is worth noting that the upper end of the condenser cavity 25 is provided with heat dissipation holes 28, which allows the condenser 26 to dissipate heat.
[0027] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.
Claims
1. A rotary waste gas treatment solvent recovery device, characterized in that, Includes a body (1), one end of which is provided with an air inlet (2), and the body (1) is provided with a first cooling section (3), a first rotary adsorption section (4), a second cooling section (5), a second rotary adsorption section (6) and a solvent recovery section (7) in sequence. The air inlet (2) is connected to the first cooling section (3), and the side of the solvent recovery section (7) is provided with an exhaust hole. The first cooling section (3) is provided with a first evaporator (8), and the second cooling section (5) is provided with a second evaporator (18). The solvent recovery section (7) is equipped with a solvent recovery tank (27), and the solvent recovery tank (27) is equipped with a third evaporator (24).
2. The rotary waste gas treatment solvent recovery device according to claim 1, characterized in that, The first evaporator (8) and the second evaporator (18) are both water-cooled evaporators. The first evaporator (8) is provided with a first cold water inlet (9) and a first cold water outlet (10), and the second evaporator (18) is provided with a second cold water inlet (21) and a second cold water outlet (22).
3. The rotary waste gas treatment solvent recovery device according to claim 2, characterized in that, The first adsorption section (4) is provided with a first adsorption wheel, the second adsorption section (6) is provided with a second adsorption wheel (23), and a hollow section (19) is provided between the first adsorption section (4) and the second cooling section (5). The hollow section (19) is connected to the second cooling section (5) through an air inlet pipe (20).
4. The rotary waste gas treatment solvent recovery device according to claim 3, characterized in that, Both the first adsorption rotor and the second adsorption rotor (23) include a rotor body (11). Both sides of the rotor body (11) are provided with connected adsorption areas (12) and desorption areas (13). The rotor body (11) is provided with a first separator box (15) on the desorption area (13) at the downstream end of the gas flow. The first separator box (15) is provided with a hot air inlet (14). The rotor body (11) is provided with a second separator box (16) on the desorption area (13) at the upstream end of the gas flow. The second separator box (16) is provided with a hot air outlet (17).
5. A rotary waste gas treatment solvent recovery device according to claim 4, characterized in that, The solvent recovery section (7) is provided with an exhaust chamber and a condenser chamber (25). The exhaust chamber and the condenser chamber (25) are independent chambers, and the condenser chamber (25) is located above the exhaust chamber. The condenser chamber (25) is provided with a condenser (26), a compressor and an expansion valve. The third evaporator (24) is connected to the condenser (26), the compressor and the expansion valve.
6. A rotary waste gas treatment solvent recovery device according to claim 5, characterized in that, The upper end of the condenser cavity (25) is provided with heat dissipation holes (28).