Double-circulation rotating wheel adsorption equipment, adsorption method and adsorption system thereof

Abstract

The invention relates to double-circulation rotating wheel adsorption equipment, an adsorption method and an adsorption system thereof. The double-circulation rotating wheel adsorption equipment comprises a fresh air treatment pipeline; the rotating wheel module comprises two rotating wheels which are arranged side by side; a first air supply pipeline; a second air supply pipeline; the first circulation system forms a circulation loop through a first air supply pipeline, a second air supply pipeline, a workshop and the first air supply pipeline, and cyclic utilization of workshop air is achieved; and the second circulation system forms a circulation loop by a fresh air treatment pipeline, a first air supply pipeline, a fourth air supply pipeline, a regeneration air return pipeline and a fresh air treatment pipeline. The system is compact and reasonable in structure and convenient to operate, and the problem of hydrogen sulfide control of the solid-state battery workshop is successfully solved through a deep dehumidification system of the double-runner module and the double-circulation system. The system adopts a graded circulation strategy: the first circulation system realizes the reutilization rate of workshop return air; the second circulating system innovatively mixes regenerated return air and fresh air, and the cooling efficiency of the first rotating wheel is improved by utilizing the low-humidity characteristic of the second circulating system.

Description

Technical Field

[0001] The invention relates to the technical field of dehumidification, in particular to a double-circulation rotary adsorption device, an adsorption method and an adsorption system thereof. Background Art

[0002] In the production process of solid-state batteries, a sulfide, such as lithium sulfide, is produced. and phosphorus pentasulfide These sulfides all have the problem of poor air stability. This substance is very easy to react chemically with moisture in the air to produce highly toxic hydrogen sulfide gas. The presence of hydrogen sulfide poses a serious threat to the production environment and the health of workers. Therefore, in the production workshop of solid-state batteries, strict dehumidification treatment must be carried out to ensure the safety of the production environment.

[0003] After in-depth research and practice, we found that when the dew point temperature in the workshop is maintained at -60℃, the generation of hydrogen sulfide can be effectively suppressed, thereby ensuring the cleanliness and safety of the production environment. At present, workshops on the market use a variety of dehumidification technologies, such as cooling dehumidification and rotary dehumidification, which can reduce the humidity of the entire workshop to a dew point of -60℃, meeting production needs to a certain extent.

[0004] However, in the actual production process, we can still detect the presence of hydrogen sulfide. This is mainly because the materials, personnel and production equipment in the workshop will generate a certain amount of moisture, which will be continuously added to the workshop air, making it difficult for the workshop humidity to be stabilized at a dew point of -60℃ for a long time. In order to ensure the long-term stability of the workshop dew point, we must make the dew point of the air entering the workshop lower than -60℃.

[0005] For example, Chinese patent CN118816299A discloses a multi-rotor ultra-low dew point adsorption device and a multi-rotor ultra-low dew point adsorption device system, which includes a first dehumidification wheel assembly and a second dehumidification wheel assembly; the second dehumidification wheel assembly includes a second adsorption zone, a second cooling zone, a second dehumidification wheel assembly regeneration heater and a second regeneration zone; by mixing the ultra-low dew point air after multi-stage dehumidification with the air at the outlet of the second cooling zone, only a part of the air originally entering the second dehumidification wheel assembly regeneration heater comes from the second cooling zone, reducing the air volume passing through the second cooling zone, thereby reducing the absolute humidity of the air passing through the regeneration heater.

[0006] Although the above dehumidification system can meet the requirement of -60℃ dew point in the air, it consumes huge energy. This is mainly because the traditional system will exhaust all the air in the workshop when exhausting, and the humidity of the exhausted air is much lower than the humidity of the newly introduced fresh air. The reason why the low-humidity air needs to be exhausted is that the sulfur content in the air is too high and cannot be used. Therefore, the whole system needs a lot of energy to reduce the humidity in the fresh air to meet the workshop's demand for low dew point.

[0007] In order to solve this problem, a double-circulation rotary adsorption device, an adsorption method and an adsorption system are proposed, aiming to reduce energy consumption and improve production efficiency while ensuring the dehumidification effect. Summary of the invention

[0008] In view of the shortcomings in the above-mentioned existing production technology, the applicant provides a dual-circulation rotary adsorption equipment, an adsorption method and an adsorption system, and successfully solves the problem of hydrogen sulfide control in solid-state battery workshops through the deep dehumidification system of dual rotary modules and dual-circulation systems.

[0009] The technical solution adopted by the present invention is as follows:

[0010] A double-circulation rotary adsorption device, comprising:

[0011] Fresh air treatment pipeline, used to introduce low-temperature fresh air;

[0012] A rotor module, comprising a first rotor and a second rotor arranged side by side, wherein the two rotors are sequentially provided with a dehumidification zone, a regeneration zone and a cooling zone according to the rotation direction, and the dehumidification zone and the regeneration zone are connected to the front-end pipelines thereof to realize adsorption and cooling respectively, wherein the regeneration zones of the two rotors are respectively connected to the return air channel and the fourth air supply pipeline and take away the adsorbent in the corresponding rotor, and the fourth air supply pipeline is connected to the return air channel and exhausts air to the outside together, and a regeneration return air pipeline connected to the fresh air treatment pipeline is also provided on the fourth air supply pipeline;

[0013] The first air supply pipeline is located between the dehumidification zones of the two rotors and is used to transport the dehumidified fresh air;

[0014] a second air supply pipeline, which is connected to the first air supply pipeline and delivers airflow to the workshop;

[0015] A first circulation system, comprising a circulation loop consisting of a first air supply pipeline, a second air supply pipeline, a workshop, a third air supply pipeline and a second rotor, and in the first circulation system, the transported gas is divided into two flow directions according to clockwise or counterclockwise passing through the second rotor;

[0016] The transported gas bypasses the second impeller and the workshop in a clockwise or counterclockwise direction, thus realizing the recycling of workshop air.

[0017] The second circulation system is composed of a fresh air treatment pipeline-a first air supply pipeline-a fourth air supply pipeline-a regeneration return pipeline-a fresh air treatment pipeline to form a one-way circulation loop, thereby realizing the recycling of return air.

[0018] In one embodiment, the fresh air processing pipeline includes a fresh air channel, on which a plurality of surface coolers are sequentially distributed to gradually cool the fresh air, a first regeneration fan is provided to increase the air volume, and a first filter is provided to filter the airflow.

[0019] In one of the embodiments, in one of the flow directions, the transported gas passes through the first air supply pipeline, the second impeller, the second air supply pipeline, the workshop and the third air supply pipeline in sequence, and then is connected to the first air supply pipeline.

[0020] In one of the embodiments, in the other flow direction, the transported gas passes through the first air supply pipeline, the third air supply pipeline, the workshop, the second air supply pipeline and the second impeller in sequence, and then is connected to the first air supply pipeline.

[0021] In one embodiment, the dehumidification zone of the first wheel is connected to the fresh air channel, and the first cooling zone is connected to the fresh air channel through the first regeneration pipeline, so as to cool the first wheel and take away a part of the adsorbent. The airflow after passing through the first cooling zone passes through the first regeneration heater and then connects to the regeneration zone of the first wheel to desorb and dehumidify the first wheel.

[0022] In one of the embodiments, the first air supply duct is provided with a second regeneration fan to increase the air volume.

[0023] In one embodiment, the dehumidification zone of the second wheel is connected to the first air supply duct, and the second cooling zone is connected to the first air supply duct through the second regeneration duct, so as to cool the second wheel and take away a part of the adsorbent. The airflow passing through the second cooling zone is heated by the second regeneration heater and then enters the regeneration zone of the second wheel to desorb and dehumidify the second wheel.

[0024] In one of the embodiments, a thermostat is provided on the second air supply duct to adjust the temperature of the air flow.

[0025] In one of the embodiments, a second filter for filtering gas is provided on the first air supply pipeline.

[0026] In one embodiment, the second air supply duct passes through the second dehumidification zone of the second wheel and is divided into two paths, one of which is mixed with the first air supply duct and flows into the third air supply duct, and the other passes through the cooling zone of the second wheel and in turn passes through the second regeneration zone of the second wheel to be connected with the fourth air supply duct.

[0027] In one of the embodiments, in the second circulation system, the air flow passing through the second wheel regeneration zone is transported through the fourth air supply duct, and the fourth air supply duct is combined with the duct passing through the first wheel cooling zone to exhaust air outward together, and the regeneration return air duct is arranged in a section before the fourth air supply duct is combined with the first cooling zone duct, the regeneration return air duct is connected to the first regeneration fan of the fresh air channel, and a fourth regeneration fan is provided in a section of the fourth air supply duct before the regeneration return air duct to enhance the wind force.

[0028] In one embodiment, each of the pipelines is provided with an adjusting air valve to control the air volume, and the regeneration return air pipeline is provided with a second adjusting air valve to control the air volume entering the first regeneration fan to ensure that the concentration of hydrogen sulfide in the mixed fresh air is less than 10 mg / m 3 .

[0029] In one of the embodiments, each of the pipelines is provided with a detection sensor for detecting air volume, temperature, dew point, moisture content and hydrogen sulfide concentration.

[0030] According to the double-circulation rotary adsorption equipment of claim 3, in the first rotary wheel, the central angle of the regeneration zone is greater than the central angle of the cooling zone, the central angle range of the regeneration zone is 30°-120°, and the central angle range of the cooling zone is 15°-90°.

[0031] In one embodiment, in the second rotor, the central angle of the regeneration zone is greater than or equal to the central angle of the cooling zone, and the central angle of the regeneration zone ranges from 15° to 90°.

[0032] An adsorption method, which utilizes the above-mentioned double-circulation rotary adsorption device, comprises the following steps:

[0033] S1. Introduce low-temperature fresh air and gradually cool it down;

[0034] S2, passing the cooled fresh air through the dehumidification zone of the first rotor and the dehumidification zone of the second rotor in turn for dehumidification treatment, and when passing through the dehumidification zone of the first rotor, the dew point of the gas is reduced to below -60°C;

[0035] S3, after being dehumidified by the second rotor, the gas is transported to the workshop, and when passing through the dehumidification zone of the second rotor, the dew point of the gas is reduced to -70°C;

[0036] S4, mix the return air from the workshop with the airflow after dehumidification treatment by the first rotor, and pass it through the dehumidification area of ​​the second rotor for dehumidification treatment again to form a first circulation system, ensuring that the gas dew point at each node of the first circulation system is lower than -60°C;

[0037] S5, regenerate part of the airflow passing through the second rotor regeneration zone, the hydrogen sulfide concentration in the regenerated return air is less than 10mg / m3, and mix it with the fresh air to reduce the dew point of the fresh air, so that the dew point of the mixed fresh air is close to -10℃, forming a second circulation system to realize the reuse of return air;

[0038] S6. The mixed low dew point fresh air enters the cooling zone of the first rotor through the control of adjusting the air valve, takes away the adsorbent in the cooling zone, mixes with the return air in the fourth air supply duct, and passes through the first regeneration zone of the first rotor.

[0039] An adsorption method, which utilizes the above-mentioned double-circulation rotary adsorption device, comprises the following steps:

[0040] SS1, introduce low-temperature fresh air and gradually cool it down;

[0041] SS2, pass the cooled fresh air through the dehumidification zone of the first rotor for dehumidification, ensuring that the gas dew point drops below -65°C when passing through the dehumidification zone of the first rotor;

[0042] SS3, then transports the gas to the workshop through the second regeneration fan;

[0043] SS4, cool the return air from the workshop through the thermostat and then send it to the dehumidification area of ​​the second rotor to ensure that the dew point of the return air is lower than -70℃;

[0044] SS5, a part of the return air passing through the second rotor is mixed with the fresh air in the first air supply duct to further reduce the dew point delivered to the workshop, forming the first circulation system, ensuring that the gas dew point at each node of the first circulation system is lower than -60℃;

[0045] SS6, the other part of the return air passing through the second rotor will regenerate the air flow passing through the regeneration zone of the second rotor, the hydrogen sulfide concentration in the regenerated return air is less than 10mg / m3, and it is mixed with the fresh air to reduce the dew point of the fresh air, so that the dew point of the mixed fresh air is close to -10℃, forming a second circulation system to realize the reuse of return air;

[0046] SS7. The mixed low dew point fresh air enters the cooling zone of the first rotor through the regulating air valve, takes away the adsorbent in the cooling zone, mixes with the return air in the fourth air supply duct, and passes through the first regeneration zone of the first rotor.

[0047] An adsorption system comprises the above-mentioned double-circulation rotary wheel adsorption equipment.

[0048] The beneficial effects of the present invention are as follows:

[0049] The present invention has a compact and reasonable structure and is easy to operate. Through the deep dehumidification system of the dual-rotor module and dual-circulation system, it successfully solves the problem of hydrogen sulfide control in the solid-state battery workshop. The system adopts a graded circulation strategy: the first circulation system realizes the reuse rate of the workshop return air, and the dew point is stabilized at -70°C through the secondary dehumidification of the second rotor; the second circulation system innovatively mixes the regenerated return air with the fresh air, which not only uses its low humidity characteristics to improve the cooling efficiency of the first rotor, but also reduces the hydrogen sulfide concentration to 2mg / m through dynamic air valve control. 3 The following perfectly balances the two core requirements of deep dehumidification and energy efficiency, providing innovative solutions for high-precision production environment control.

[0050] At the same time, the present invention also has the following advantages:

[0051] This solution achieves precise dew point control of workshop air through an innovative three-stage surface cooler cooling and dual-rotor adsorption coupling structure. In the fresh air treatment section, a three-stage surface cooler (first surface cooler-second surface cooler-third surface cooler) with gradually decreasing cooling capacity is used, combined with the first dehumidification zone of the first rotor and the second dehumidification zone of the second rotor to form a two-stage adsorption system, so that the dew point of the airflow at P6 reaches -60℃, and the dew point of the airflow finally sent to the workshop (P13) is further reduced to -70℃. This gradient dehumidification structure has two technical advantages: first, after the airflow treated by the first rotor (dew point -60℃) is mixed with the workshop return air (dew point -60℃), further dehumidification and post-heating in the second rotor reduces the dew point to -70℃, ensuring that the actual dew point of the workshop is stable below the safety threshold; second, the system is specially designed with a hydrogen sulfide concentration balance mechanism. When the hydrogen sulfide content in the first air supply pipeline is 2mg / m 3 The workshop return air is 4.67mg / m 3 After mixing, the concentration is controlled at 4.4 mg / m 3 , combined with the thermodynamic effect of the thermostat, the formation reaction of hydrogen sulfide is effectively suppressed.

[0052] The system realizes multi-level energy recycling by constructing a double closed-loop structure of the first circulation system (workshop return air-first air supply pipeline-second rotor-workshop) and the second circulation system (regeneration return air-fresh air channel-rotor cooling zone-regeneration zone). Specifically, the first circulation system purifies the workshop exhaust air (dew point -60°C at P10) through the second filter, mixes it with the ultra-dry airflow in the first air supply pipeline (dew point -60°C at P6), and performs secondary dehumidification through the second rotor. This process can save about 35% energy compared to fresh air treatment. The innovation of the second circulation system is reflected in the regeneration return air (dew point -26.3°C at P16) is controlled by the second regulating air valve and then mixed with the fresh air (dew point -1.1°C at P4). Not only does it use the regeneration waste heat to preheat the fresh air, but it also enhances the dehumidification efficiency of the first cooling zone through the humidity gradient difference.

[0053] The zoning optimization design of the rotor module achieves a dynamic balance between the adsorption and regeneration processes through the differentiated zoning configuration of the first and second rotors (the central angle of the regeneration zone of the first rotor is 30°-120°, the cooling zone is 15°-90°; the regeneration zone of the second rotor is 15°-90°). The first rotor adopts a large-angle regeneration zone design to ensure that the adsorbate can be completely desorbed during the high-temperature regeneration stage (the first regeneration heater is heated to 120-150°C); while the smaller regeneration zone angle of the second rotor (15°-90°) matches the precise temperature control of the thermostat (maintaining the air flow dew point at -70°C), which not only guarantees the deep dehumidification requirements, but also avoids energy waste caused by excessive regeneration. This zoning optimization increases the rotor adsorption efficiency to 92% and reduces the regeneration energy consumption by 18%. At the same time, the special angle design of the cooling zone (15°-90° for the first rotor) optimizes the airflow path to make the temperature gradient on the rotor surface smoother, extending the service life of the adsorption material by about 30%.

[0054] Dynamic air volume control and pollutant coordinated control system sets intelligent regulating air valves (first regulating air valve, second regulating air valve, etc.) in each pipeline, and combines the frequency conversion control of the fourth regeneration fan to achieve dynamic balance of air volume. In view of the characteristics of hydrogen sulfide generation, a pollutant emission path is specially designed: the hydrogen sulfide concentration in the second regeneration pipeline is monitored by a sensor. When the content is close to the threshold, the return air entering the regeneration return air pipeline is reduced. This graded emission strategy keeps the hydrogen sulfide concentration in the system exhaust air below 10mg / m 3 environmental standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 It is a system flow chart of the adsorption equipment of the present invention.

[0056] Figure 2 This is a parameter table of the air in each pipeline in the adsorption equipment of the present invention.

[0057] Figure 3 This is a system flow chart of the adsorption equipment in Example 3 of the present invention.

[0058] Figure 4 This is a parameter table of the air in each pipeline of the adsorption equipment in Example 3 of the present invention.

[0059] Figure 5 It is a schematic structural diagram of the first rotating wheel in the present invention.

[0060] Figure 6 It is a schematic structural diagram of the second rotating wheel in the present invention.

[0061] in:

[0062] 10. Fresh air channel; 20. First rotor; 30. First air supply duct; 40. Second rotor; 50. Second air supply duct; 60. Workshop; 70. Third air supply duct; 80. First regeneration duct; 90. Return air channel; 100. Second regeneration duct; 110. Fourth air supply duct; 120. Regeneration return air duct; 130. Fifth air supply duct; 140. Sixth air supply duct; 150. Seventh air supply duct;

[0063] 101, first filter; 102, first surface cooler; 103, second surface cooler; 104, first regeneration fan; 105, third surface cooler;

[0064] 201, first dehumidification zone; 202, first cooling zone; 203, first regeneration zone;

[0065] 301, second regeneration fan; 302, second filter; 303, fourth surface cooler;

[0066] 401, second dehumidification zone; 402, second cooling zone; 403, second regeneration zone;

[0067] 501. Thermostat;

[0068] 801, first regulating air valve; 901, first regeneration heater; 902, third regeneration fan; 1001, second regeneration heater; 1101, fourth regeneration fan; 1102, second regulating air valve. DETAILED DESCRIPTION

[0069] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0070] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0071] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0072] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0073] In the description of the embodiments of the present application, the term "plurality" refers to more than two (including two).

[0074] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0075] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0076] As described in the background technology, during the solid-state battery manufacturing process, the air humidity in the workshop and the people and materials in the workshop will produce a certain amount of water vapor. If the air flow dew point is too high, it will also promote the production of harmful gases such as hydrogen sulfide, causing damage to the health of workers and production equipment.

[0077] At the same time, when exhausting air, the traditional dehumidification system will exhaust all the air in the workshop due to the high content of hydrogen sulfide in the air flow to meet the quality requirements of the air flow in the workshop.

[0078] Based on the above considerations, in order to solve the problem of high dew point in traditional workshops and avoid the huge energy loss caused by exhausting the return air of the workshop.

[0079] Figure 1 A system flow chart of the adsorption device of the present application is shown.

[0080] Figure 2 The airflow quality parameters monitored in each pipeline in this application are shown. The monitored data include air volume, temperature, dew point, moisture content and hydrogen sulfide content. That is, P represents the location of the sensor, and P0-P16 represent the airflow quality monitored by sensors at different locations. This application sets multiple sensors to monitor the dehumidification effect of the adsorption system. The number of sensors can be selected and applied during actual use. In addition, in this application Figure 2 The dew point and hydrogen sulfide content in the table are particularly low because the present application is used in a solid-state battery workshop, where the dew point needs to be strictly controlled at -60°C. However, according to actual use, if the dehumidification equipment does not have high requirements for the dew point, the adsorption equipment in this embodiment can be used to control the hydrogen sulfide content below the national standard critical value, thereby achieving the reuse of exhaust return air under the premise of complying with national and industry standards. This embodiment can perform dehumidification treatment on workshops with different dew point requirements.

[0081] Example 1: Please refer to Figure 1-Figure 6 In this embodiment, a dual-circulation rotor adsorption device is disclosed, which includes a fresh air treatment pipeline, a rotor module (including a first rotor 20 and a second rotor 40), a first air supply pipeline 30, a second air supply pipeline 50, a first circulation system (composed of the first air supply pipeline 30-the second air supply pipeline 50-the workshop 60 and the third air supply pipeline 70-the first air supply pipeline 30) and a second circulation system. Through multiple dehumidification, cooling and heating treatments, deep dehumidification and precise control of workshop air are achieved, the generation of hydrogen sulfide is effectively suppressed, and through dual circulation, energy utilization efficiency is improved at the same time.

[0082] Specifically, the fresh air processing pipeline is used to introduce low-temperature fresh air to provide a fresh air source for the entire adsorption system. The first surface cooler 102, the second surface cooler 103 and the third surface cooler 105 are sequentially distributed on the fresh air channel 10, and the cooling capacity of the multiple surface coolers decreases in sequence, gradually cooling the fresh air. Figure 2 It can be seen from the table data in that after 3 levels of refrigeration, the temperature of the fresh air at P5 will reach 13°C. In particular, it is necessary to cool down the high-temperature airflow of the regenerated return air. At this temperature, the fresh air passing through the first cooling zone 202 can greatly reduce the temperature of the first rotor 20, thereby improving the dehumidification efficiency of the subsequent first dehumidification zone 201. At the same time, a first regeneration fan 104 is provided on the fresh air channel 10 to increase the air volume and ensure that the fresh air can smoothly pass through the first rotor 20, while also facilitating the subsequent regeneration return air to mix and circulate. In addition, a first filter 101 is also provided on the fresh air channel 10 to filter the introduced fresh air and remove impurities and particulate matter in the airflow.

[0083] like Figure 1As shown, the rotor module in this embodiment includes a first rotor 20 and a second rotor 40 arranged side by side, and the first rotor 20 is closer to the fresh air processing pipeline than the second rotor 40. Both rotors are sequentially provided with a dehumidification zone, a regeneration zone and a cooling zone according to the rotation direction, and the dehumidification zone and the cooling zone are both connected to their fresh air processing pipelines to realize adsorption and cooling functions respectively.

[0084] Specifically, the first rotor 20 is provided with a first dehumidification zone 201, a first regeneration zone 203 and a first cooling zone 202 in sequence along the rotation direction. The first dehumidification zone 201 is connected to the fresh air channel 10, and is used to absorb impurities in the fresh air, such as moisture, and the purified fresh air is delivered to the first air supply pipeline 30. The first cooling zone 202 is connected to the fresh air channel 10 through the first regeneration pipeline 80 to cool the first rotor 20. The airflow after passing through the first cooling zone 202 is heated by the first regeneration heater 901, and then connected to the first regeneration zone 203 of the first rotor 20 to perform high-temperature regeneration on the first rotor 20. The airflow passing through the first regeneration zone 203 is discharged through the return air channel 90, and the return air channel 90 is provided with a third regeneration fan 902 to enhance the exhaust effect.

[0085] The second rotor 40 is provided with a second dehumidification zone 401, a second regeneration zone 403 and a second cooling zone 402 in sequence along the rotation direction. The second dehumidification zone 401 is connected to the first air supply pipeline 30, and is used to absorb impurities, such as moisture, in the airflow in the first air supply pipeline 30. The airflow after passing through the second dehumidification zone 401 is transported to the workshop 60 through the second air supply pipeline 50, and a thermostat 501 is provided on the second air supply pipeline 50 to perform temperature and humidity control on the airflow. At the same time, the return air in the workshop 60 is connected to the second regeneration fan 301 in the first air supply pipeline 30 through the third air supply pipeline 70 to realize the reuse of the workshop exhaust air. A second filter 302 is provided at the rear end of the second regeneration fan 301 in the first air supply pipeline 30 to filter impurities in the airflow to meet the effect of airflow reuse.

[0086] The second cooling zone 402 is connected to the first air supply pipeline 30 through the second regeneration pipeline 100 to cool the second rotor 40. The airflow passing through the second cooling zone 402 is heated by the second regeneration heater 1001 and then enters the second regeneration zone 403 of the second rotor 40 to perform high-temperature regeneration on the second rotor 40.

[0087] The first air supply pipeline 30 in this embodiment is located between the two rotary dehumidification zones, and is used to perform secondary cooling and dehumidification treatment on the fresh air after dehumidification. A fourth surface cooler 303 is provided on the first air supply pipeline 30 to further cool the fresh air. At the same time, a second regeneration fan 301 is provided in the first air supply pipeline 30 to further increase the air volume and ensure that the fresh air can smoothly pass through the dehumidification zone. In order to improve the utilization rate of the return air flow, a second filter 302 is also provided on the first air supply pipeline 30 to improve the air flow quality, especially the filtration of the workshop return air flow. Figure 2 It can be seen from the table data that the dew point of the air flow P6 passing through the first dehumidification zone 201 and entering the first air supply duct 30 is -60°C. The dew point at this time can prevent the moisture in the air flow from contacting with the sulfide in the workshop return air to produce hydrogen sulfide, and also ensure that the air flow entering the second impeller 40 can continue to maintain a dew point of -60°C.

[0088] The second air supply pipeline 50 in this embodiment is connected to the dehumidification area of ​​the second rotor 40, and adjusts the temperature and humidity of the air flow before transporting it to the workshop 60. A thermostat 501 is provided on the second air supply pipeline 50 to adjust the temperature and humidity of the air flow. Figure 2 It can be seen from Table P13 that after post-temperature and humidity adjustment, the dew point of the airflow is -70°C. Even if the personnel and materials in workshop 60 will produce a certain amount of moisture, the dew point of -70°C can still meet the workshop's requirements for airflow temperature and humidity, and further ensure that the dew point of the workshop return air will not drop too low, affecting the subsequent reuse of the workshop return air.

[0089] The first circulation system in this embodiment is composed of the first air supply pipeline 30-the second rotor 40-the second air supply pipeline 50-the workshop 60 and the third air supply pipeline 70-the first air supply pipeline 30 to form a circulation loop, that is, the gas is as follows Figure 1 As shown, the air in the workshop 60 passes through the second rotor 40 in a clockwise direction to realize the recycling of the workshop air. Through the first circulation system, the return air in the workshop 60 can be sent back into the workshop 60 after being processed, thereby improving the utilization efficiency of the air flow and reducing energy consumption. Figure 2 The table shows that the dew point at P10 is -60°C and the hydrogen sulfide content is 4.67 mg / m 3 , which is also the critical dew point for the generation of hydrogen sulfide gas. Although the hydrogen sulfide content is relatively high, the dew point at P6 is also -60°C. Therefore, after mixing, the hydrogen sulfide content will drop to 4.4 mg / m 3 It can still meet the needs of the workshop. Therefore, under the action of the first circulation system, the workshop return air can be effectively utilized to achieve energy saving and emission reduction, greatly improving energy utilization.

[0090] The second circulation system in this embodiment is composed of a fresh air treatment pipeline-first air supply pipeline 30-second regeneration pipeline 100-fourth air supply pipeline 110-regeneration return air pipeline 120-fresh air treatment pipeline to form a circulation loop, realizing the recycling of return air. Figure 2 The dew point at P12 in the table is -60°C, and the hydrogen sulfide content at this time is 4.4 mg / m3. At the same time, after the airflow passes through the second cooling zone 402 and the second regeneration zone 403 of the second rotor 40 in sequence, the dew point at P16 is -26.3°C, and the hydrogen sulfide content is 5 mg. This is because the moisture content in the cooling zone 402 and the regeneration zone 403 of the second rotor 40 is relatively high, so the sulfide in the airflow reacts with the moisture to generate part of the hydrogen sulfide. The dew point and hydrogen sulfide content at P3 are the same as those at P16. Compared with the dew point at P2, At this point, the dew point value at P3 is obviously at a low level. If it is discharged directly, it will cause a huge waste of energy. At this time, the second regulating air valve 1102 controls the air intake in the regeneration return air pipeline 120, and the exhaust return air is reused. After mixing with the fresh air, the overall dew point value is reduced and the hydrogen sulfide concentration is also reduced. At the same time, the third surface cooler 105 in this embodiment is arranged at the rear end of the first regeneration fan 104, so that the mixed air can be cooled. See that the dew point value at P4 is -1.1℃, and the hydrogen sulfide content is 2mg / m 3 This low-temperature and low-dew-point mixed fresh air can also better bring out the moisture in the first cooling zone 202, thereby improving the dehumidification effect in the first dehumidification zone 201. Through the second circulation system, the return air that has been dehumidified and heated can be sent into the fresh air treatment pipeline again, mixed with the fresh air for treatment, thereby further improving the utilization efficiency of the airflow and the dehumidification effect. At the same time, it should be pointed out in this application that although a plurality of surface coolers are used to cool the mixed fresh air here, in the actual working process, the energy consumption of reducing the dew point to below 0°C is much greater than the energy consumption of directly cooling the fresh air. Therefore, in a comprehensive comparison, this method can reduce energy consumption.

[0091] The fourth air supply duct 110 in this embodiment can also be connected to the regeneration zone 403 of the second wheel 40, and is used to transport the air flow passing through the second regeneration zone 403 of the second wheel 40, and the fourth air supply duct 110 is combined with the exhaust duct passing through the first cooling zone 202 of the first wheel 20 and introduced into the regeneration zone 403 of the second wheel 40 together, and then exhausted to the outside. Before the fourth air supply duct 110 is merged with the exhaust duct of the first cooling zone 202, a regeneration return air duct 120 is also provided. The regeneration return air duct 120 is connected to the first regeneration fan 104 of the fresh air duct 10 to realize the reuse of return air. At the same time, the fourth air supply duct 110 is provided with a fourth regeneration fan 1101 before the regeneration return air duct 120 to further enhance the wind force and facilitate the utilization of return air in the regeneration return air duct 120. The regeneration return air duct 120 is provided with a second regulating air valve 1102 (a three-way valve can also be provided for branch control), which can effectively control the air intake into the regeneration return air duct 120, and is used to control the air volume entering the first regeneration fan 104 to meet the concentration of hydrogen sulfide in the mixed fresh air to be lower than 10 mg / m3.

[0092] In the first return air cycle of this embodiment, Figure 2 The table in the middle shows that in this embodiment, the dew point of the airflow entering the workshop 60 is -70°C through multiple dehumidification and cooling treatments and the thermostat 501. At this time, even if the personnel and materials in the workshop 60 will produce a certain amount of moisture, the dew point in the workshop 60 will be lower than -60°C, thereby suppressing the generation of hydrogen sulfide.

[0093] In addition, the dew point of the return air in workshop 60 is -60℃, and the content of hydrogen sulfide is 4.67mg / m 3 The dew point of the air flow delivered by the first air supply pipeline 30 is -60°C, which can further suppress the generation of hydrogen sulfide. Moreover, the hydrogen sulfide content in the air flow delivered by the first air supply pipeline 30 is 2 mg / m 3 After mixing with the workshop 60 return air, the air flow dew point remains unchanged, and the hydrogen sulfide content of the mixed air flow is 4.4mg / m 3 , after passing through the second rotor 40 and the thermostat 501, it still meets the requirements of the workshop 60;

[0094] Part of the air flow in the first air supply pipeline 30 will be transported toward the return air channel 90 through the second regeneration pipeline 100. Since the reaction of hydrogen sulfide is irreversible, part of the air flow needs to be discharged to avoid excessive hydrogen sulfide after long-term circulation.

[0095] In the second return air cycle of this embodiment, after the airflow in the first air supply pipeline 30 is transported to the return air channel 90 through the second regeneration pipeline 100, the airflow will contact the water-containing airflow in the second cooling zone 402 of the second rotor 40, thereby causing the hydrogen sulfide content in the airflow to increase to 4.7 mg / m3 When the airflow passes through the second regeneration zone 403 of the second rotor 40 again, the hydrogen sulfide content in the airflow further increases to 5 mg / m 3 , by adjusting the air valve to control part of the air flow to enter the regeneration return air duct 120 and connect it to the fresh air duct 10, further utilize this part of the air flow with a lower dew point, save energy, and at the same time, after the hydrogen sulfide in the air flow is mixed with the fresh air, the content of hydrogen sulfide is reduced, and the subsequent utilization requirements can be met, that is, the return air flow is utilized and the air flow quality requirements can be met, which greatly reduces energy loss; in addition, by setting a first regulating air valve 801 on the first regeneration duct 80, controlling part of the air flow in the fresh air duct 10 to pass through the first cooling zone 202, the hydrogen sulfide in the return air duct 90 can be diluted, which meets environmental protection requirements and also reduces the temperature of the first rotor 20. The first rotor 20 has a better dehumidification effect at low temperatures, which improves the dehumidification effect of the first dehumidification zone 201. At the same time, after the fresh air is mixed with the regeneration return air duct 120, the mixed fresh air has a low dew point and low humidity, which can further reduce the processing load of the first dehumidification zone 201. This is also the advantage of setting three partitions for the first rotor 20 in this application.

[0096] Each of the pipelines is provided with an adjustable air valve to control the air volume, and cooperates with the regeneration fan to facilitate the control of the air volume.

[0097] Example 2: Figure 1 As shown, what is different from Example 1 is that a seventh air supply duct 150 is also provided on the fresh air duct 10, which directly crosses the first impeller 20 and is connected to the first air supply duct 30, and a corresponding regulating air valve is provided on the seventh air supply duct 150. Since the dew point in the fresh air duct 10 is relatively low after mixing, it can meet the workshop requirements within a period of time after directly passing through the dehumidification of the second impeller. In addition, by setting the seventh air supply duct 150, the maintenance, inspection or replacement of the first impeller 20 can also be facilitated.

[0098] In addition, in this embodiment, a fifth air supply duct 130 directly leading to the workshop 60 is also provided on the first air supply duct 30, and a sixth air supply duct 140 for exhausting air to the outside is provided on the workshop 60, which is used for ventilation when the second impeller 40 is maintained, repaired or replaced, and when the workshop is not in operation.

[0099] At the same time, in this embodiment, when the first impeller 20 and the second impeller 40 are maintained, repaired or replaced, there is no need to stop the machine, and the replacement can be performed during operation, thereby improving work efficiency.

[0100] Example 3: Figure 3 and Figure 4As shown, the difference between this embodiment and embodiment 1 is that, in the first circulation system of this embodiment, the gas passes through the second rotor 40 counterclockwise, that is, the transported gas passes through the first air supply pipeline 30, the third air supply pipeline 70, the workshop 60, the second air supply pipeline 50 and the second rotor 40 in sequence, and then is connected to the first air supply pipeline 30. In this embodiment, it can be used in workshops with lower dew point requirements, and can also be used in single-rotor adsorption equipment.

[0101] At the same time, in actual use, in workshops with low dew point requirements, the adsorption equipment of Example 1 can be simply deformed to achieve the desired effect, and the deformation can be achieved by simply changing part of the structure in the first circulation system, thereby greatly reducing the cost of conversion and improving the utilization value.

[0102] In this embodiment, a thermostat is provided on the second air supply pipeline 50 for cooling the gas to meet the dehumidification requirement of the second rotor 40 .

[0103] In another embodiment, a second filter 302 for filtering gas is provided on the first air supply pipeline 30, and a filter may also be provided on the second air supply pipeline during actual use.

[0104] In this embodiment, the second air supply duct 50 passes through the second dehumidification zone 401 of the second rotor 40 and is divided into two paths, one of which is mixed with the first air supply duct 30 and flows into the third air supply duct 70, and the other passes through the second cooling zone 402 of the second rotor 40, and in turn passes through the second regeneration zone 403 of the second rotor 40 to connect with the fourth air supply duct 110, thereby returning air to the outside.

[0105] Example 4: Figure 5 and Figure 6 As shown, based on Example 1, the partitions of the first wheel 20 and the second wheel 40 are limited in this embodiment, so as to better improve the dehumidification effect.

[0106] like Figure 5 As shown, in the first rotor 20 of this embodiment, the central angle of the regeneration zone 203 is greater than the central angle of the cooling zone 202, the central angle range of the regeneration zone 203 is 30°-120°, and the central angle range of the cooling zone 202 is 15°-90°, achieving a dynamic balance between the adsorption and regeneration processes. The first rotor 20 adopts a large-angle regeneration zone 203 design to ensure that moisture can be completely desorbed during the high-temperature regeneration stage (the first regeneration heater 901 is heated to 120-150°C).

[0107] like Figure 6As shown, in the second rotor 40 of the present embodiment, the central angle of the regeneration zone 403 is greater than or equal to the central angle of the cooling zone 402, and the central angle range of the regeneration zone 403 is 15°-90°. The second rotor 40 has a smaller second regeneration zone 403 angle (15°-90°), thereby reducing the contact area between the return air flow and the second regeneration zone 403, avoiding the influence of moisture in the second regeneration zone 403 on sulfides in the return air, and reducing the production of hydrogen sulfide, thereby ensuring the deep dehumidification requirements and avoiding energy waste caused by excessive regeneration. Because the moisture content in the second rotor 40 is itself very low, the area of ​​the second regeneration zone 403 of the second rotor 40 does not need to be very large.

[0108] In another embodiment, the central angle range of the second regeneration zone 403 and the second cooling zone 402 of the second rotor 40 is set to the same 45°, which can improve the passing efficiency of the return air and realize the release of moisture. In addition, since the return air of the second rotor 40 will also pass through the first regeneration zone 203 of the first rotor 20, it can meet the moisture discharge of the second rotor 40. This partition optimization increases the rotor adsorption efficiency to 92% and reduces the regeneration energy consumption by 18%.

[0109] At the same time, the special angle design of the cooling zone 202 (15°-90° for the first rotor 20) makes the temperature gradient on the rotor surface more gentle, thus extending the service life of the adsorption material by about 30%.

[0110] Embodiment 5: This embodiment discloses a dual-circulation rotor adsorption method, which utilizes a dual-circulation rotor adsorption device in Embodiment 1, which includes a fresh air treatment pipeline, a rotor module (including a first rotor 20 and a second rotor 40), a first air supply pipeline 30, a second air supply pipeline 50, and related pipelines and components constituting the first circulation system and the second circulation system. Through this method, deep dehumidification and precise control of workshop air are achieved, the generation of hydrogen sulfide is effectively suppressed, and energy utilization efficiency is improved.

[0111] The specific implementation steps are as follows:

[0112] S1. Fresh air introduction and cooling treatment:

[0113] Low-temperature fresh air is introduced through the fresh air treatment pipeline to provide a fresh air flow source for the entire adsorption system.

[0114] A first surface cooler 102, a second surface cooler 103 and a third surface cooler 105 are sequentially arranged on the fresh air duct 10, and the refrigeration capacities of the multiple surface coolers decrease in sequence to gradually cool down the fresh air. After three levels of refrigeration, the fresh air temperature drops to 13°C, providing favorable conditions for subsequent dehumidification treatment.

[0115] S2, dehumidification and regeneration of the first rotor 20:

[0116] The fresh air passes through the first dehumidification zone 201 of the first rotor 20, and moisture in the fresh air is adsorbed to reduce the dew point of the gas to below -60°C.

[0117] S3, the second rotor 40 dehumidification and workshop 60 air supply:

[0118] The airflow dehumidified by the first rotor 40 enters the first air supply pipeline 30 and undergoes secondary cooling and dehumidification treatment through the fourth surface cooler 303 .

[0119] The airflow in the first air supply pipeline 30 enters the second dehumidification zone 401 of the second rotor 40 to absorb moisture in the airflow.

[0120] The airflow after passing through the second dehumidification zone 401 is transported to the workshop 60 through the second air supply pipeline 50, ensuring that the dew point is lower than -70°C.

[0121] S4, the first circulation system:

[0122] The return air in the workshop 60 is connected to the second regeneration fan 301 in the first air supply pipeline 30 through the third air supply pipeline 70, so as to realize the reuse of the exhaust air in the workshop.

[0123] The first circulation system is composed of the first air supply pipeline 30-the second air supply pipeline 50-the workshop 60 and the third air supply pipeline 70-the first air supply pipeline 30 to form a circulation loop, which improves the utilization efficiency of the air flow and reduces energy consumption. At the same time, it ensures that the gas dew point in each link of the first circulation system is lower than -60°C to avoid sulfide from generating hydrogen sulfide, thereby reducing the generation of hydrogen sulfide in the first circulation system. Figure 2 It can be seen from the table that, except for a small amount of hydrogen sulfide emitted in workshop 60, the overall hydrogen sulfide content does not increase, and part of the gas will be discharged from the first circulation system, thereby ensuring that the hydrogen sulfide content in the first circulation system is within a reasonable range and achieving long-term continuous operation.

[0124] S5, Second Circulation System:

[0125] The second cooling zone 402 of the second rotor 40 is connected to the first air supply pipeline 30 through the second regeneration pipeline 100, so as to cool the second rotor 40 and take away a part of the moisture. The airflow passing through the second cooling zone 402 is heated by the second regeneration heater 1001 and then enters the second regeneration zone 403 of the second rotor 40 for desorption and dehumidification, so as to ensure that the dew point after passing through the second rotor 40 is not lower than -20°C and the concentration of hydrogen sulfide is lower than 10mg / m3. The airflow is connected to the first regeneration fan 104 of the fresh air channel 10 through the regeneration return air pipeline 120 to realize the reuse of the return air and the energy utilization of the second circulation system. At the same time, in the second circulation system, after the return air and the fresh air are mixed, it is ensured that the dew point of the fresh air is close to -10°C and the concentration of hydrogen sulfide is lower than 5mg / m3 , which is convenient for subsequent continuous reuse.

[0126] At the same time, since the dew points in the first circulation system are all lower than -60 degrees Celsius and the overall moisture content is low, even if the return air from the workshop 60 passes through the second dehumidification zone 401 of the second wheel, it will not cause excessive moisture content in the second wheel 40. Therefore, when the second regeneration pipeline 100 passes through the cooling zone 402 and the regeneration zone 403 of the second wheel 40, its dew point will not rise significantly and can still reach -26.3°C. At the same time, since the dew point rises less, the amount of hydrogen sulfide produced is less. This is also the main reason why the workshop return air can be used for regeneration circulation in this embodiment, because the dew point values ​​of each link in the entire adsorption equipment system are at a relatively low level, so the amount of hydrogen sulfide produced is also relatively low. After the return air is mixed with the fresh air, the overall hydrogen sulfide concentration will be diluted and decreased, but the low dew point return air can greatly reduce the dew point of the fresh air, greatly saving energy.

[0127] S6. Reuse of mixed fresh air;

[0128] The mixed fresh air contacts the first cooling zone 202 of the first rotor 20 through the first regeneration pipeline 80. The mixed fresh air with a dew point of 0°C can take away moisture in the first rotor 20, thereby improving the dehumidification effect of the dehumidification zone 201 of the first rotor 20.

[0129] The cooled airflow is then heated by the first regeneration heater 901 and connected to the first regeneration zone 203 of the first rotor 20 to desorb and dehumidify the first rotor 20 .

[0130] Another part of the gas in the fourth air supply pipeline 110 is combined with the gas in the pipeline passing through the first cooling zone 202 and then exhausted to the outside.

[0131] The air intake in the regeneration return air duct 120 is controlled by the second regulating air valve 1102, and the exhaust return air is reused and mixed with the fresh air to reduce the overall dew point value and hydrogen sulfide concentration.

[0132] In this embodiment, each pipeline is provided with an adjustable air valve to control the air volume, and cooperates with the regeneration fan to facilitate the control of the air volume.

[0133] By adjusting the coordination of the air valve and the regeneration fan, the air volume entering each area is controlled to ensure that the concentration of hydrogen sulfide in the mixed fresh air is lower than 10mg / m 3 requirements.

[0134] The dual-circulation rotary adsorption method of this embodiment achieves deep dehumidification and precise control of workshop air through multiple dehumidification, cooling and heating processes, effectively inhibiting the generation of hydrogen sulfide. At the same time, the dual-circulation system improves the utilization efficiency of airflow and energy utilization efficiency, achieving the effect of energy saving and emission reduction.

[0135] Embodiment 6: This embodiment discloses another dual-circulation rotor adsorption method, which utilizes a dual-circulation rotor adsorption device in Embodiment 3, and the adsorption device includes a fresh air treatment pipeline, a rotor module (including a first rotor 20 and a second rotor 40), a first air supply pipeline 30, a second air supply pipeline 50, and related pipelines and components constituting the first circulation system and the second circulation system. Through this method, deep dehumidification and precise control of workshop air are achieved, the generation of hydrogen sulfide is effectively suppressed, and energy utilization efficiency is improved.

[0136] The specific steps include:

[0137] SS1, low-temperature fresh air is introduced through the fresh air channel 10, and the fresh air is gradually cooled down by passing through the first filter 101, the first surface cooler 102 and the second surface cooler 103 in sequence;

[0138] SS2, passing the cooled fresh air through the first dehumidification zone 201 of the first rotor 20 for dehumidification, ensuring that the dew point of the gas is reduced to below -65°C when passing through the first dehumidification zone 201;

[0139] SS3, the dehumidified gas is transported to the first air supply pipeline 30 through the first regeneration fan 104, and then transported to the workshop 60;

[0140] SS4, the return air from the workshop 60 is transported to the thermostat 501 through the return air channel 90 for cooling, and then transported to the second dehumidification zone 401 of the second rotor 40 to ensure that the dew point of the return air is lower than -70°C;

[0141] SS5, a part of the return air passing through the second rotor 40 is mixed with the fresh air in the first air supply pipeline 30, further reducing the dew point delivered to the workshop 60, forming a first circulation system, ensuring that the gas dew point of each node of the first circulation system is lower than -60°C;

[0142] SS6, the other part of the return air passing through the second rotor 40 will pass through the second rotor regeneration zone 403 of the air flow through the second regeneration pipeline 100 for return air regeneration, and the hydrogen sulfide concentration in the regenerated return air is less than 10mg / m 3 and mix with fresh air to lower the fresh air dew point, so that the dew point of the mixed fresh air is close to -10℃, forming a second circulation system to realize the reuse of return air;

[0143] SS7. The mixed low dew point fresh air enters the first cooling zone 202 of the first rotor 20 through the first regulating air valve 801, takes away the moisture in the cooling zone, and then mixes with the return air in the fourth air supply duct 110 and passes through the first regeneration zone 203 of the first rotor 20.

[0144] The difference from the fifth embodiment is that the flow direction of the gas in the first circulation system relative to the second impeller 40 is different.

[0145] Example 7: Based on Examples 1 to 3, this example discloses an adsorption system, which includes the adsorption equipment in Examples 1 to 3. By adopting this double-circulation rotary adsorption equipment, the adsorption method in Examples 5 and 6 is also adopted.

[0146] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. Any form of modification may be made within the scope of protection of the present invention.

Claims

1. A double-circulation rotary adsorption device, characterized in that: include: Fresh air treatment pipeline, used to introduce fresh air; A rotor module, comprising a first rotor and a second rotor arranged side by side, wherein the two rotors are provided with a dehumidification zone, a regeneration zone and a cooling zone in sequence according to the rotation direction, and the dehumidification zone and the regeneration zone are connected to the front-end pipelines thereof to realize adsorption and cooling respectively, wherein the regeneration zones of the two rotors are connected to the return air channel and the fourth air supply pipeline respectively, and the fourth air supply pipeline is connected to the return air channel, and a regeneration return air pipeline connected to the fresh air treatment pipeline is also provided on the fourth air supply pipeline; The first air supply pipeline is located between the dehumidification zones of the two rotors and is used to transport the dehumidified fresh air; A second air supply pipeline, which is connected to the first air supply pipeline and conveys the air flow to the workshop; A first circulation system, comprising a circulation loop consisting of a first air supply pipeline, a second air supply pipeline, a workshop, a third air supply pipeline and a second rotor, and in the first circulation system, the transported gas is divided into two flow directions according to clockwise or counterclockwise passing through the second rotor; The second circulation system is composed of a fresh air treatment pipeline-a first air supply pipeline-a fourth air supply pipeline-a regeneration return pipeline-a fresh air treatment pipeline to form a one-way circulation loop.

2. A double-circulation rotary wheel adsorption device according to claim 1, characterized in that: The fresh air processing pipeline includes a fresh air channel, on which a plurality of surface coolers are sequentially distributed to gradually cool the fresh air, a first regeneration fan is provided to increase the air volume, and a first filter is provided to filter the airflow.

3. A double-circulation rotary wheel adsorption device according to claim 2, characterized in that: In one of the flow directions, the transported gas passes through the first air supply pipeline, the second impeller, the second air supply pipeline, the workshop and the third air supply pipeline in sequence, and then is connected to the first air supply pipeline.

4. A double-circulation rotary wheel adsorption device according to claim 3, characterized in that: In the other flow direction, the transported gas passes through the first air supply pipeline, the third air supply pipeline, the workshop, the second air supply pipeline and the second impeller in sequence, and then is connected to the first air supply pipeline.

5. A double-circulation rotary wheel adsorption device according to any one of claims 2 to 4, characterized in that: The dehumidification zone of the first wheel is connected to the fresh air channel, and the first cooling zone is connected to the fresh air channel through the first regeneration pipeline, so as to cool the first wheel and take away a part of the adsorbent. The airflow after passing through the first cooling zone passes through the first regeneration heater and then connects to the regeneration zone of the first wheel to desorb and dehumidify the first wheel.

6. A double-circulation rotary wheel adsorption device according to claim 3, characterized in that: The first air supply pipeline is provided with a second regeneration fan to increase the air volume.

7. A double-circulation rotary wheel adsorption device according to claim 3, characterized in that: The dehumidification zone of the second wheel is connected to the first air supply duct, and the second cooling zone is connected to the first air supply duct through the second regeneration duct, so as to cool the second wheel and take away a part of the adsorbent. The airflow passing through the second cooling zone is heated by the second regeneration heater and then enters the regeneration zone of the second wheel to desorb and dehumidify the second wheel.

8. A double-circulation rotary wheel adsorption device according to any one of claims 3 or 4, characterized in that: The second air supply pipeline is provided with a thermostat to adjust the temperature of the air flow.

9. A double-circulation rotary wheel adsorption device according to any one of claims 3 or 4, characterized in that: The first air supply pipeline is provided with a second filter for filtering gas.

10. A double-circulation rotary wheel adsorption device according to claim 4, characterized in that: The second air supply duct passes through the second dehumidification zone of the second wheel and is divided into two paths, one of which is mixed with the first air supply duct and flows to the third air supply duct, and the other passes through the cooling zone of the second wheel and in turn passes through the second regeneration zone of the second wheel and is connected to the fourth air supply duct.

11. A double-circulation rotary wheel adsorption device according to any one of claims 1 to 4, characterized in that: In the second circulation system, the air flow passing through the second wheel regeneration zone is transported through the fourth air supply duct, and the fourth air supply duct is combined with the duct passing through the first wheel cooling zone to exhaust air outside together, and the regeneration return air duct is arranged in a section before the fourth air supply duct is combined with the first cooling zone duct, the regeneration return air duct is connected to the first regeneration fan of the fresh air channel, and a fourth regeneration fan is provided in a section of the fourth air supply duct before the regeneration return air duct to enhance the wind force.

12. A dual-circulation rotary wheel adsorption device according to claim 1, characterized in that: Each of the pipelines is provided with an air regulating valve to control the air volume. The regeneration return air pipeline is provided with a second air regulating valve to control the air volume entering the first regeneration fan to ensure that the concentration of hydrogen sulfide in the mixed fresh air is less than 10 mg / m 3 .

13. The double-circulation rotary wheel adsorption device according to claim 1, characterized in that: Each of the pipelines is provided with a detection sensor for detecting air volume, temperature, dew point, moisture content and hydrogen sulfide concentration.

14. A double-circulation rotary wheel adsorption device according to claim 3, characterized in that: In the first rotating wheel, the central angle of the regeneration zone is greater than the central angle of the cooling zone, the central angle of the regeneration zone ranges from 30° to 120°, and the central angle of the cooling zone ranges from 15° to 90°.

15. The double-circulation rotary wheel adsorption device according to claim 5, characterized in that: In the second rotor, the central angle of the regeneration zone is greater than or equal to the central angle of the cooling zone, and the central angle of the regeneration zone ranges from 15° to 90°.

16. An adsorption method, which utilizes a double-circulation rotary adsorption device according to claim 7, characterized in that: The steps include: S1. Introduce low-temperature fresh air and gradually cool it down; S2, passing the cooled fresh air through the dehumidification zone of the first rotor and the dehumidification zone of the second rotor in turn for dehumidification treatment, and when passing through the dehumidification zone of the first rotor, the dew point of the gas is reduced to below -60°C; S3, after being dehumidified by the second rotor, the gas is transported to the workshop, and when passing through the dehumidification zone of the second rotor, the dew point of the gas is reduced to -70°C; S4, mix the return air from the workshop with the airflow after dehumidification treatment by the first rotor, and pass it through the dehumidification area of ​​the second rotor for dehumidification treatment again to form a first circulation system, ensuring that the gas dew point at each node of the first circulation system is lower than -60°C; S5, regenerate part of the airflow passing through the second rotor regeneration zone, the hydrogen sulfide concentration in the regenerated return air is less than 10mg / m3, and mix it with the fresh air to reduce the dew point of the fresh air, so that the dew point of the mixed fresh air is close to -10℃, forming a second circulation system to realize the reuse of return air; S6. The mixed low dew point fresh air enters the cooling zone of the first rotor through the control of adjusting the air valve, takes away the adsorbent in the cooling zone, mixes with the return air in the fourth air supply duct, and passes through the first regeneration zone of the first rotor.

17. An adsorption method, which utilizes a double-circulation rotary adsorption device according to claim 10, characterized in that: The steps include: SS1, introduce low-temperature fresh air and gradually cool it down; SS2, pass the cooled fresh air through the dehumidification zone of the first rotor for dehumidification, ensuring that the gas dew point drops below -65°C when passing through the dehumidification zone of the first rotor; SS3, then transports the gas to the workshop through the second regeneration fan; SS4, cool the return air from the workshop through the thermostat and then send it to the dehumidification area of ​​the second rotor to ensure that the dew point of the return air is lower than -70℃; SS5, a part of the return air passing through the second rotor is mixed with the fresh air in the first air supply duct to further reduce the dew point delivered to the workshop, forming the first circulation system, ensuring that the gas dew point at each node of the first circulation system is lower than -60℃; SS6, the other part of the return air passing through the second rotor will regenerate the air flow passing through the regeneration zone of the second rotor, the hydrogen sulfide concentration in the regenerated return air is less than 10mg / m3, and it is mixed with the fresh air to reduce the dew point of the fresh air, so that the dew point of the mixed fresh air is close to -10℃, forming a second circulation system to realize the reuse of return air; SS7. The mixed low dew point fresh air enters the cooling zone of the first rotor through the regulating air valve, takes away the adsorbent in the cooling zone, mixes with the return air in the fourth air supply duct, and passes through the first regeneration zone of the first rotor.

18. An adsorption system, characterized in that: It comprises a double-circulation rotary wheel adsorption device as claimed in claim 1.

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