Incomplete cycle heat recovery rotary adsorption system and method for reducing adsorbate concentration

Abstract

The present application relates to an incomplete cycle heat recovery rotor adsorption system and a method for reducing the concentration of adsorbents, which includes a rotor with a rotation function and a regenerative adsorption capacity, wherein the spaces corresponding to the two axial end faces of the rotor are sequentially divided into a working area, a plurality of buffer areas, a plurality of regeneration areas and a recovery area along the rotation direction, wherein the buffer area is connected with the recovery area and forms at least one circulation channel, the working area has a working channel for fluid to cross the rotor, the regeneration area has a regeneration channel for fluid to cross the rotor, the circulation channel is connected with at least one of the working channel and the regeneration channel, and the circulation channel forms an inflow and outflow balance. The present application has the effect of improving heat recovery efficiency and reducing heat loss.

Description

Technical Field

[0001] The present application relates to the field of dehumidification equipment, and in particular to an incomplete cycle heat recovery rotary adsorption system and a method for reducing the concentration of adsorbates. Background Art

[0002] Rotary dehumidifiers are mainly used for air dehumidification or waste gas treatment, with the advantages of low energy consumption and good humidity control performance. They are especially suitable for system engineering with high comprehensive requirements for humidity, temperature and cleanliness, such as the production of medicines, food, candy, milk powder, laminated glass and printed products. The relative humidity needs to be controlled at 10%-40%.

[0003] For some high-tech products, the production environment is an effective guarantee to ensure zero-defect products. For example, the humidity requirement of the lithium battery material processing workshop needs to be 1%-2%. Conventional refrigeration dehumidification methods cannot achieve this, and a rotary dehumidifier unit must be used to achieve this.

[0004] The rotary dehumidifier mainly includes a rotor. The area where the axial end surface of the rotor is located is divided into a moisture absorption zone and a regeneration zone. The rotor generally rotates 8 to 18 times per hour, and its surface will continue to circulate in the moisture absorption zone and the regeneration zone.

[0005] During operation, the fluid to be dehumidified is called the working fluid. The working fluid flows from the dehumidification area through the rotor, and the moisture in the working fluid will be adsorbed on the surface of the rotor. When the surface of this part of the rotor rotates to the regeneration area, a stream of heated fluid will flow from the regeneration area through the rotor in the opposite direction, thereby taking away the moisture intercepted by the rotor, so that this part of the rotor has the ability to absorb moisture again and gradually returns to the dehumidification area. The reverse fluid is called the regeneration fluid.

[0006] In the above process, the regenerated fluid must have a sufficient temperature to fully remove moisture, which will also make the discharged regenerated fluid a high-temperature and high-humidity fluid, and the heat will be directly lost. Although this loss is less energy-consuming than other dehumidification methods, under the background of national carbon peak and carbon neutrality, the innovative application of various energy-saving processes has become more and more urgent. Summary of the invention

[0007] In order to reduce heat loss, the present application provides an incomplete cycle heat recovery wheel adsorption system and a method for reducing the concentration of adsorbate.

[0008] In the first aspect, the present application provides an incomplete cycle heat recovery rotor adsorption system, which adopts the following technical solution: an incomplete cycle heat recovery rotor adsorption system and a method for reducing the concentration of an adsorbate, comprising a rotor with a rotation function and a regenerative adsorption capacity, wherein the spaces corresponding to the two axial end faces of the rotor are sequentially divided into a working area, a plurality of buffer areas, a plurality of regeneration areas and a recovery area along the rotation direction, wherein the buffer area is connected to the recovery area and forms at least one circulation flow channel, the working area has a working flow channel for fluid to cross the rotor, the regeneration area has a regeneration flow channel for fluid to cross the rotor, the circulation flow channel is connected to at least one of the working flow channel and the regeneration flow channel and the circulation flow channel forms an inlet and outlet flow balance.

[0009] By adopting the above technical solution, the buffer zone and the recovery zone can form a transition, so that the originally large temperature difference, humidity difference and pressure difference between the regeneration zone and the working zone can be separated, forming a stepped pressure change, which can reduce the infiltration between the partitions and prevent adsorption and desorption from interfering with each other; during operation, the fluid that needs to be separated can pass through the wheel in the working area, so that the water, VOC and other components that need to be separated in the fluid are adsorbed on the wheel, and the adsorbed part is called part A of the wheel. When part A rotates to the buffer zone, the circulating fluid with a higher temperature than the working fluid will pass through the buffer zone and preheat the buffer zone. Here, the flow direction of the circulating fluid relative to the rotor is opposite to the flow direction of the working fluid relative to the rotor; then part A rotates to the regeneration zone, and the heated regenerated fluid passes through part A through the regeneration zone. Part A of the rotor continues to heat up, causing the components adsorbed on the surface of the rotor to desorb and be discharged with the regenerated fluid; then part A rotates to the recovery zone, and the circulating fluid passing through the buffer zone arrives at the recovery zone. At this time, the temperature of part A of the rotor is higher than the temperature of the circulating fluid. The circulating fluid passes through the rotor and absorbs heat, and the temperature of part A of the rotor decreases accordingly. In this way, the circulating fluid can preheat the rotor when it returns to the buffer zone, and part A, which has been pre-cooled in the recovery zone, can quickly return to the adsorption state after reaching the working zone and adsorb again.

[0010] In the above process, the working fluid and / or the regenerating fluid can be added to and evacuated from any position of the circulating flow channel. In this way, on the one hand, the circulating flow channel can immediately obtain or replenish the initial circulating fluid as the equipment is started in the initial stage, so that the circulating flow channel can quickly enter the circulation work; on the other hand, the temperature variable can be introduced so that the circulating fluid can quickly reach the required temperature, so that the buffer zone and the recovery zone can quickly enter the working state. Thirdly, compared with the independent circulating fluid that can only rely on the temperature transfer of the rotor to control the temperature of the circulating fluid, the temperature control of the circulating fluid will be easier and more accurate by adopting the intervention temperature control; fourthly, when the fluid passes through the buffer zone, a small amount of adsorption components will be brought out. If it is an independent circulating fluid, the component will easily accumulate in the circulating flow channel and affect the adsorption function of the recovery zone and the working zone. By adopting this semi-open drainage, the retained component can be diffused, so that the working zone maintains a good adsorption function.

[0011] In summary, the entire system can efficiently recover and recycle heat, greatly reducing heat loss.

[0012] Optionally, the spaces corresponding to the two axial end faces of the wheel are respectively called the front side and the back side, wherein the side where the fluid in the working area enters the wheel is the front side, and the circulation channel is connected to at least one of the front side and the back side of the regeneration channel.

[0013] By adopting the above technical solution, the temperature of the regeneration channel is higher than that of other channels. After the fluid in the regeneration channel is introduced into the circulation channel, the circulating fluid can be better heated, thereby improving the desorption effect of the wheel in the regeneration zone and improving the desorption efficiency; correspondingly, the range of the regeneration zone can be narrowed and the range of the working zone can be increased.

[0014] Optionally, the regeneration flow channel on the dorsal side is connected to the circulation flow channel on the dorsal side via an inflow branch, the circulation flow channel on the front side is connected to the regeneration flow channel on the front side via an outflow branch, an outflow flow control device is provided on the outflow branch, and the circulation flow channel on the front side is provided with a circulation conveying device for increasing the flow rate and flow velocity on the passage from the impeller to the outflow branch.

[0015] By adopting the above technical solution, at the initial stage of equipment startup, the entire system can introduce a higher temperature and drier regeneration fluid into the circulation flow channel through the regeneration flow channel to supplement the circulating fluid, so that the circulation flow channel quickly reaches the working temperature, and the circulating fluid always maintains a high temperature when entering the rotor from the buffer zone. In this way, the part of the rotor that passes through the working area and enters the buffer zone can be heated more quickly, and this part can also quickly enter the desorption state after entering the regeneration zone, thereby effectively improving the desorption regeneration efficiency of the rotor.

[0016] The flow control device can control the opening of the outflow branch, so as to control the amount of circulating fluid discharged in each circulation branch, thereby controlling the temperature and pressure of the circulating fluid. The circulation conveying device can increase the fluid pressure in the circulation flow channel, so that the fluid pressure in the circulation flow channel is always higher than the fluid pressure in the regeneration flow channel, thereby preventing the regeneration fluid with desorbed components from flowing into the circulation flow channel.

[0017] Optionally, the regeneration flow channel on the positive side is matched with a regeneration conveying device, and the outflow branch is located between the regeneration conveying device and the rotor.

[0018] By adopting the above technical solution, the regeneration conveying device can make the regeneration channel form a negative pressure relative to the outflow branch channel, further increase the pressure difference between the regeneration channel and the circulation channel, so that the regeneration fluid with desorbed components cannot flow into the circulation channel. It can also increase the pressure difference between the regeneration channel on the front side and the regeneration channel on the back side, so that the desorption flow of the regeneration fluid is smoother.

[0019] Optionally, the regeneration flow channel on the back side is connected to the circulation flow channel on the back side via an inlet branch, the circulation flow channel on the front side is provided with an independent outflow branch for discharging fluid outward, and the circulation flow channel on the front side is provided with a circulation conveying device for increasing the flow rate and flow velocity on the passage from the impeller to the outflow branch.

[0020] By adopting the above technical solution, the outflow branch of the circulating fluid in the circulating flow channel does not interfere with the regenerated fluid.

[0021] Optionally, the regeneration flow channel on the positive side is matched with a heating device, and the inlet branch channel is located between the heating device and the rotor.

[0022] By adopting the above technical solution, the regeneration fluid introduced into the regeneration flow channel can be heated, and the part of the regeneration fluid that is diverted into the circulating fluid is also a heated fluid.

[0023] Optionally, a working branch is connected between the working flow channel on the positive side and the circulation flow channel on the positive side, the working branch is matched with a working stop valve, and the flow area of ​​the circulation flow channel between the working branch and the outflow branch is matched with a circulation check valve that prevents the fluid from flowing from the working branch to the outflow branch.

[0024] By adopting the above technical solution, taking the dehumidification of space A as an example, if the humidity of space B where the regeneration fluid is introduced is also not low, this system can be selected for dehumidification; the working branch introduces part of the working fluid into the circulation flow channel, and this part of the working fluid is mixed with the circulating fluid and passes through the wheel from the recovery area, and the wheel will adsorb the moisture of this part of the working fluid and desorb it as the wheel rotates to the regeneration area, and the separated working fluid enters the buffer zone on the back side as part of the circulating fluid, thereby reducing the introduction of the regeneration fluid and reducing the heating pressure of the heating device.

[0025] Optionally, the buffer zone on the back side of the rotor is merged with the regeneration zone on the back side; the fluid entering from the recovery zone on the front side and passing through the rotor to the recovery zone on the back side can merge with the fluid about to enter the regeneration zone on the back side.

[0026] By adopting the above technical solution, during operation, the regenerative fluid on the back side will be divided into two streams after passing through the rotor, wherein the first regenerative fluid passes through the buffer zone to preheat the part of the rotor located in the buffer zone, so that when the part reaches the regeneration zone, it can quickly meet the desorption requirements, and the second regenerative fluid can smoothly take away the moisture. After that, the part of the rotor passing through the regeneration zone will continue to heat up and reach the recovery zone, and the first regenerative fluid after losing some heat will pass through the rotor in the recovery zone. The first regenerative fluid can pre-cool the recovery zone on the one hand, and on the other hand, it also recovers heat and merges with the newly introduced regenerative fluid on the back side to reduce the amount of regenerative fluid introduced and the thermal energy consumption.

[0027] In a second aspect, the present application provides a method for reducing the concentration of adsorbate in a fluid to be treated by using a rotary adsorption system, using the following technical solution:

[0028] An adsorption method for an incomplete cycle heat recovery rotary adsorption system comprises the following steps:

[0029] Rotating the rotor so that a portion of a given volume of the rotor passes successively through a working area, a plurality of buffer areas, a plurality of regeneration areas, and a recovery area before returning to the working area;

[0030] passing the working fluid through the runner in the working zone;

[0031] The regenerating fluid is passed through the rotor in the regenerating zone, and the flow direction of the regenerating fluid is opposite to that of the working fluid;

[0032] A part of the regenerated fluid is mixed with the fluid with recovered heat flowing out of the recovery area through a specific channel, and then they enter the buffer area and pass through the rotor together;

[0033] The fluid flowing out of the buffer zone channel is divided into two flows, one part of the fluid is mixed with the regenerated fluid passing through the regeneration zone through a specific channel and then discharged from the system together, or is discharged from the system directly through a specific channel; the other part flows through the recovery zone to the next link.

[0034] By adopting the above technical solution, during operation, the working fluid passes through the rotor in the working area, so that the water, VOC and other components that need to be separated in the working fluid are adsorbed on the rotor. The adsorbed part is called the A part of the rotor, and the fluid that circulates through the buffer zone and the recovery zone is called the circulating fluid. When the A part rotates to the buffer zone, the circulating fluid with a temperature higher than that of the working fluid will pass through the buffer zone and preheat the buffer zone. Here, the flow direction of the circulating fluid relative to the rotor is opposite to the flow direction of the working fluid relative to the rotor. Afterwards, part A rotates to the regeneration zone, and part of the heated regenerated fluid is diverted to merge with the circulating fluid that is about to enter the buffer zone, and the temperature of the merged circulating fluid is increased. When part A passes through the buffer zone, the circulating fluid passing through part A is the heated circulating fluid; another part of the regenerated fluid passes through part A through the regeneration zone, and part A of the rotor is continuously heated to desorb the components adsorbed on the surface of the rotor and discharge them with the regenerated fluid; then part A rotates to the recovery zone, and the circulating fluid passing through the buffer zone arrives at the recovery zone. At this time, the temperature of part A of the rotor is higher than the temperature of the circulating fluid. The circulating fluid passes through the rotor and absorbs heat, and the temperature of part A of the rotor decreases accordingly. In this way, the circulating fluid can preheat the rotor when it returns to the buffer zone, and part A, which has been pre-cooled in the recovery zone, can quickly return to the adsorption state after reaching the working zone and adsorb again.

[0035] In the above process, part of the circulating fluid on the positive side will be discharged through a specific channel to balance the fluid introduced by the regeneration fluid diversion on the back side.

[0036] Optionally, at least one of the concentrations of water vapor, volatile organic compounds (VOC), and nitrogen oxides in the working fluid is reduced by passing through the rotor via the first section.

[0037] By adopting the above technical scheme, one or more adsorbates can be treated.

[0038] In summary, the present application includes at least one of the following beneficial technical effects:

[0039] 1. The buffer zone and the recovery zone can form a transition, so that the larger temperature difference, humidity difference and pressure difference between the original regeneration zone and the working zone can be separated, forming a stepped pressure change, which can reduce the infiltration between the partitions and prevent adsorption and desorption from interfering with each other; during operation, the fluid that needs to be separated can pass through the rotor in the working zone, so that the water, VOC and other components that need to be separated in the fluid are adsorbed on the rotor, and the adsorbed part is called the A part of the rotor. When part A rotates to the buffer zone, the circulating fluid with a higher temperature than the working fluid will pass through the buffer zone and preheat the buffer zone. Here, the flow direction of the circulating fluid relative to the rotor is opposite to the flow direction of the working fluid relative to the rotor; then part A rotates to the regeneration zone, and the heated regenerated fluid passes through part A through the regeneration zone. Part A of the rotor continues to heat up, causing the components adsorbed on the surface of the rotor to desorb and be discharged with the regenerated fluid; then part A rotates to the recovery zone, and the circulating fluid passing through the buffer zone arrives at the recovery zone. At this time, the temperature of part A of the rotor is higher than the temperature of the circulating fluid. The circulating fluid passes through the rotor and absorbs heat, and the temperature of part A of the rotor decreases accordingly. In this way, when the circulating fluid returns to the buffer zone, it can preheat the rotor, and part A after pre-cooling in the recovery zone can quickly return to the adsorption state after reaching the working zone and re-adsorb;

[0040] 2. The working fluid and / or the regenerated fluid can be added to and evacuated from the circulating fluid at any position in the circulating flow channel. In this way, on the one hand, the circulating flow channel can immediately obtain or replenish the initial circulating fluid as the equipment is started in the initial stage, so that the circulating flow channel can quickly enter the circulating work; on the other hand, the temperature variable can be introduced so that the circulating fluid can quickly reach the required temperature, so that the buffer zone and the recovery zone can quickly enter the working state. Thirdly, compared with independent circulating fluids that can only rely on the temperature transfer of the rotor to control the temperature of the circulating fluid, the temperature control of the circulating fluid will be easier and more accurate by using interventional temperature control; fourthly, when the fluid passes through the buffer zone, it will bring out a small amount of adsorption components. If it is an independent circulating fluid, this component will easily accumulate in the circulating flow channel and affect the adsorption function of the recovery zone and the working zone. By using this semi-open drainage, the retained component can be diffused, so that the working zone maintains a good adsorption function;

[0041] 3. At the initial stage of equipment startup, the entire system can introduce a higher temperature and drier regeneration fluid into the circulation channel through the regeneration channel to supplement the circulating fluid, so that the circulation channel quickly reaches the working temperature, and the circulating fluid always maintains a high temperature when entering the rotor from the buffer zone. In this way, the part of the rotor that passes through the working area and enters the buffer zone can be heated more quickly, and this part can also quickly enter the desorption state after entering the regeneration zone, thereby effectively improving the desorption regeneration efficiency of the rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic diagram of the overall structure of the rotary adsorption system of Example 1.

[0043] Figure 2 It is a schematic structural diagram of the rotating wheel and the wheel frame of Example 1.

[0044] Figure 3 Schematic diagram of fluid flow in the rotary adsorption system of Example 1, where arrows indicate fluid flow.

[0045] Figure 4 It is a schematic diagram of fluid data of the rotary wheel adsorption system of Example 1, and the arrows indicate the fluid flow direction.

[0046] Figure 5 It is a schematic diagram of the structure of the rotary adsorption system of Example 2, and the arrows indicate the flow direction of the fluid.

[0047] Figure 6 It is a schematic diagram of fluid data of the rotary wheel adsorption system of Example 2, and the arrows indicate the fluid flow direction.

[0048] Figure 7 It is a schematic diagram of the structure of the rotary adsorption system of Example 3, and the arrows indicate the fluid flow direction.

[0049] Figure 8 It is a schematic diagram of the structure of the rotary adsorption system of Example 3, and the arrows indicate the fluid flow direction.

[0050] Explanation of the reference numerals in the accompanying drawings: 1. impeller; 2. wheel frame; 21. seal; 3. working area; 31. working flow channel; 32. working branch; 33. working stop valve; 35. induced draft fan; 4. buffer zone; 41. circulation flow channel; 42. inflow branch; 43. outflow branch; 44. flow control device; 45. circulation conveying device; 46. circulation branch; 47. first circulation stop valve; 48. second circulation stop valve; 49. circulation check valve; 5. regeneration area; 51. regeneration flow channel; 52. heating device; 53. regeneration conveying device; 54. regeneration induced draft fan; 6. recovery area; 8. shell; 81. motor. DETAILED DESCRIPTION

[0051] The following is combined with Figure 1-7 This application is described in further detail.

[0052] The embodiments of the present application disclose an incomplete cycle heat recovery wheel adsorption system and a method for reducing the concentration of adsorbates.

[0053] Embodiment 1:

[0054] Reference Figure 1 and Figure 2, an incomplete cycle heat recovery wheel adsorption system, includes a wheel 1 and a wheel frame 2, and the wheel frame 2 is located at both axial ends of the wheel 1. When in use, the wheel frame 2 is stationary, and the wheel 1 can rotate relative to the wheel frame 2. The wheel frame 2 and the wheel 1 can be in an absolute position relationship or a relative position relationship in specific structure: for example, the wheel 1 can be rotatably connected to the wheel frame 2 by passing through a rotating shaft; the wheel 1 and the wheel frame 2 can also be respectively connected to a box or shell 8, in which the wheel 1 is rotatably connected and the wheel frame 2 is fixedly connected. This embodiment takes the connection to the shell 8 as an example, and a motor 81 that drives the wheel 1 by chain drive or belt drive is also installed in the shell 8. The specific connection structure of the wheel 1 and the wheel frame 2 is very mature, and this application will not be expanded.

[0055] The skeleton of the wheel frame 2 itself divides the areas at both ends of the axial direction of the runner 1 into a working area 3, a buffer area 4, a regeneration area 5 and a recovery area 6 which are sequentially distributed along the circumference of the runner 1. The number of buffer areas 4 and recovery areas 6 can be set to one or more according to the actual working conditions, and this embodiment takes one of each as an example. The working area 3, the buffer area 4, the regeneration area 5 and the recovery area 6 are all fan-shaped, and the sum of the central angles of the buffer area 4, the regeneration area 5 and the recovery area 6 is less than or equal to the central angle of the working area 3. In this embodiment, the ratio of the sum of the central angles of the buffer area 4, the regeneration area 5 and the recovery area 6 to the central angle of the working area 3 is 1:1.

[0056] The frame surface of the wheel frame 2 is fixed or embedded with a seal 21 in contact with the surface of the runner 1. The seal 21 is a temperature-resistant and pressure-resistant rubber strip, so that the partitions on the same side do not interfere with each other, and the fluids of each partition will not interact through the gap between the wheel frame 2 and the runner 1. Correspondingly, each partition is also matched with an independent fluid channel.

[0057] Reference Figure 1 and Figure 3 , the channel corresponding to the working area 3 is the working flow channel 31, the working flow channel 31 passes the fluid to be treated, and the fluid to be treated is named the working fluid. The working fluid is generally an airflow, and the adsorbents to be removed generally include one or more of water vapor, organic volatiles (VOC), and nitrogen oxides in the working fluid. In this embodiment, the removal of water vapor is taken as an example. For the convenience of distinction, the axial ends of the runner 1 are divided into the front side and the back side, and the side where the working fluid is passed is the front side. The working flow channel 31 on the front side is matched with a working induced draft fan 35. The working fluid passes through the runner 1 and is discharged from the working flow channel 31 on the back side through the traction of the working induced draft fan 35. In this process, most of the water vapor in the airflow will be adsorbed by the runner 1, and the discharged airflow is an airflow with low humidity.

[0058] Subsequently, the portion of the wheel 1 adsorbed with water will pass through the buffer zone 4, the regeneration zone 5 and the recovery zone 6 in sequence as the wheel 1 rotates, and the wheel 1 is preheated, desorbed and the heat of the wheel 1 is recovered in sequence.

[0059] Among them, the fluid channel corresponding to the buffer zone 4 on the front side is connected to the fluid channel corresponding to the recovery zone 6 on the front side, and the fluid channel corresponding to the buffer zone 4 on the back side is connected to the fluid channel corresponding to the recovery zone 6 on the back side. The channel connecting the buffer zone 4 and the recovery zone 6 constitutes a circulation channel 41.

[0060] The channel corresponding to the regeneration zone 5 is a regeneration channel 51. The regeneration channel 51 on the back side is matched with a heating device 52. The heating device 52 is any heater that can heat the airflow and is less affected by humidity. The regeneration channel 51 on the front side is matched with a regeneration conveying device 53. In this embodiment, the regeneration conveying device 53 is a fan. In other embodiments, it can also be other drainage structures that can guide the airflow and are less affected by humidity. The regeneration channel 51 on the back side is passed through a regeneration fluid, which is generally an airflow with a smaller water vapor content than the working fluid.

[0061] The regeneration flow channel 51 on the back side is connected to the circulation flow channel 41 on the back side through an inflow branch 42, and the inflow branch 42 is located between the heating device 52 and the runner 1. The circulation flow channel 41 on the front side is connected to the regeneration flow channel 51 on the front side through an outflow branch 43, and an outflow flow control device 44 is provided on the outflow branch 43. In this embodiment, the flow control device 44 is a stop valve, and in other embodiments, it can also be a throttling structure that cannot adjust the opening after the resistance is set, such as a permeable membrane. The circulation flow channel 41 on the front side is provided with a circulating conveying device 45 on the passage from the runner 1 to the outflow branch 43. In this embodiment, the circulating conveying device 45 is a fan, and in other embodiments, it can also be other drainage structures that can guide airflow and are less affected by humidity. The interface between the outflow branch 43 and the regeneration flow channel 51 is located between the regeneration conveying device 53 and the runner 1, and the circulating conveying device 45 is located between the outflow branch 43 and the runner 1.

[0062] The implementation principle of Example 1 is:

[0063] Initial startup of the device:

[0064] The wheel 1 does not rotate, and the regeneration flow channel 51 on the back side introduces the regeneration fluid and heats the regeneration fluid simultaneously. Most of the regeneration fluid passes through the wheel 1 and is discharged from the regeneration flow channel 51 on the front side. During this process, the part of the wheel 1 located in the regeneration zone 5 is heated. A small part of the regeneration fluid enters the circulation flow channel 41 on the back side through the inflow branch channel 42 and mixes with the circulating fluid in the circulation flow channel 41. After that, the circulating fluid is pulled by the circulation conveying device 45 on the front side and passes through the part of the wheel 1 corresponding to the buffer zone 4. After passing through, part of it is merged into the front side regeneration flow channel 51 through the outflow branch channel 43, and part of it passes through the part of the wheel 1 located in the recovery zone 6 and returns to the circulation flow channel 41 on the back side.

[0065] Equipment working stage:

[0066] Rotating the rotor 1, each portion of the rotor 1 passes through the working area 3, the dry buffer area 4, the dry regeneration area 5 and the recovery area 6 before returning to the working area 3;

[0067] The working fluid passes through the runner 1 from the front working area 3, and the water vapor in the working fluid is adsorbed on the runner 1. The working fluid discharged from the back working channel 31 is dry working fluid. For ease of understanding, the part of the runner 1 that has adsorbed water vapor is called part A.

[0068] Afterwards, part A reaches the buffer zone 4 as it rotates, passes through the buffer zone 4 from the back side of the wheel 1, and continues to preheat part A. Since the temperature of part A is not high at this time, the amount of water vapor adsorbed by part A and desorbed with the circulating fluid is very small, and a small part of it is also discharged from the outflow branch during the continuous circulation and mixing process.

[0069] Afterwards, part A reaches the regeneration zone 5, where the temperature of the regenerated fluid is higher, and part A will continue to be heated and water vapor will be continuously desorbed from part A, and the desorbed water vapor will be discharged along with the regenerated fluid.

[0070] Afterwards, part A reaches the recovery zone 6. At this time, the circulating fluid passing through the buffer zone 4 reaches the recovery zone 6. At this time, the temperature of part A of the rotor 1 is higher than the temperature of the circulating fluid. The circulating fluid passes through the rotor 1 and absorbs heat, and the temperature of part A of the rotor 1 decreases accordingly. In this way, when the circulating fluid returns to the buffer zone 4, it can preheat the rotor 1, and part A of the recovery zone 6, which has been pre-cooled, can quickly return to the adsorption state after reaching the working zone 3 and re-adsorb.

[0071] Reference Figure 4 During the continuous operation, the flow rate, temperature, humidity and dew point of each part of the fluid are also close to stability. This state can be adjusted according to the rotation speed of the wheel 1, the fluid flow rate, the fluid temperature, etc. This embodiment takes one of the stable states as an example:

[0072]

[0073]

[0074] Among them, speed is the flow rate of the fluid, temperature is the temperature of the fluid, dew point temperature is the temperature of the fluid, and dew point temperature refers to the temperature when the air is cooled to saturation under the condition that the water vapor content in the air remains unchanged and the air pressure is kept constant. It is called dew point temperature, or dew point for short. The water content is the weight of water vapor in every kilogram of fluid. It can also be seen from the data that the circulating fluid will bring out a little water in the process of passing through the impeller 1, and the introduction of regenerated fluid and continuous discharge through the outflow branch can effectively avoid the accumulation of water in the circulating fluid, and provide better environmental conditions for regeneration desorption and working adsorption. Correspondingly, it can be seen that the working fluid adsorbed by the impeller 1 passing through the working area 3 has a very low water content, and the dehumidification effect is very good.

[0075] Embodiment 2:

[0076] Reference Figure 5 and Figure 6 The difference between this embodiment and embodiment 1 is that the outflow branch channel 43 is not connected to the regeneration flow channel 51, but has an independent discharge port.

[0077] During the continuous operation, the flow rate, temperature, humidity and dew point of each part of the fluid are also close to stable. This state can be adjusted according to the rotation speed of the wheel 1, the fluid flow rate, the fluid temperature, etc. This embodiment takes one of the stable states as an example:

[0078]

[0079] Among them, speed is the flow rate of the fluid, temperature is the temperature of the fluid, dew point temperature is the temperature of the fluid, and dew point temperature refers to the temperature when the air is cooled to saturation under the condition that the water vapor content in the air remains unchanged and the air pressure is kept constant. It is called dew point temperature, or dew point for short. The water content is the weight of water vapor in every kilogram of fluid. It can also be seen from the data that the circulating fluid will bring out a little water in the process of passing through the impeller 1, and the introduction of regenerated fluid and continuous discharge through the outflow branch can effectively avoid the accumulation of water in the circulating fluid, and provide better environmental conditions for regeneration desorption and working adsorption. Correspondingly, it can be seen that the working fluid adsorbed by the impeller 1 passing through the working area 3 has a very low water content, and the dehumidification effect is very good.

[0080] Embodiment 3:

[0081] Reference Figure 7, the difference between this embodiment and embodiment 1 is that the inflow branch and the outflow branch are eliminated, the circulation channel and the regeneration channel on the front side are not connected, and the buffer zone 4 on the back side of the wheel 1 is merged with the regeneration zone 5 on the back side. The regeneration channel 51 on the back side is matched with a heating device 52 and a regeneration induced draft fan 54. The regeneration channel 51 on the back side can introduce external airflow and blow it to the merged area after being heated by the heating device 52. The airflow blowing to the merged area merges with the airflow returning to the merged area from the circulation channel 41 and is collectively referred to as a mixed airflow. After the mixed airflow passes through the dehumidification wheel 1, a small part of the mixed airflow enters the buffer zone 4 on the front side, and most of it enters the regeneration zone 5 on the front side. At this time, the part of the dehumidification wheel 1 that has just entered the buffer zone 4 from the working area 3 is at a low temperature, and the small mixed airflow mainly preheats this part of the dehumidification wheel 1, and cannot take away or can only take away a very small part of the adsorbed water. The part of the dehumidification wheel 1 located in the regeneration zone 5 on the front side is preheated and then continues to be heated by the regeneration airflow and takes away a large amount of adsorbed water therein. The airflow containing moisture will be discharged to the outside through the regeneration channel on the front side. After the dehumidification wheel 1 desorbs the adsorbed moisture in the regeneration zone 5, it recovers the adsorption function and then enters the recovery zone 6. The fluid entering from the recovery zone 6 on the front side and passing through the wheel 1 to the recovery zone 6 on the back side can merge with the fluid about to enter the regeneration zone 5 on the back side.

[0082] The implementation principle of Example 1 is:

[0083] After the working fluid is cooled down in the early stage, the temperature is 12℃-15℃, and the relative humidity reaches 95% or the mixed working condition is achieved with dehumidified return air. It enters the working area 3 on the positive side at a speed of 2m / s-4m / s for adsorption and dehumidification. After passing through the rotor 1, a certain temperature rise and low humidity outlet air are obtained. The rotor 1 is a honeycomb rotor 1, which rotates continuously at 6-10 revolutions per hour for moisture absorption treatment.

[0084] The regeneration fluid is taken from a conventional environment, heated to 130°C-150°C by a heating device 52, mixed with a heat recovery fluid at about 110°C, and then enters the back regeneration zone 5 and the back buffer zone 4 for desorption and dehumidification.

[0085] The regenerated fluid is divided into two paths after passing through the impeller 1. One path close to the working area 3 has a lower temperature in the area, and the air outlet temperature in the buffer area 4 on the positive side is about 30°C. This air is transported to the recovery area 6 on the positive side through the circulating conveying device 45. The other path is the regenerated fluid in the regeneration area 5. The regenerated fluid has high temperature and high humidity, with a temperature of about 60°C-70°C, and is discharged to the outside through the regeneration fan.

[0086] The above system recovers energy through the high and low temperatures on both sides of the regeneration zone 5 of the wheel 1, neutralizes and absorbs the temperatures of the buffer zone 4 and the recovery zone 6, and fully recovers heat, making the dehumidification effect of the regeneration zone 5 of the wheel 1 more efficient and stable, improving the operating stability of the equipment, and reducing energy consumption.

[0087] Embodiment 4:

[0088] Reference Figure 8 The difference between this embodiment and embodiment 1 is that:

[0089] A working branch 32 is connected between the working flow channel 31 on the positive side and the circulation flow channel 41 on the positive side. The working branch 32 is matched with a working stop valve 33. The circulation flow channel 41 is matched with a circulation check valve 49 in the flow area between the working branch 32 and the outflow branch to prevent the fluid from flowing from the working branch 32 to the outflow branch.

[0090] The circulation branch is provided with a circulation branch 46 connected to the regeneration flow channel 51, the heating device 52 is located between the circulation branch 46 and the runner 1, and the circulation branch 46 is provided with a first circulation stop valve 47. The circulation flow channel 41 is provided with a second circulation stop valve 48 between the connection node with the circulation branch 46 and the connection node with the inflow branch 42.

[0091] If the humidity of the regeneration fluid introduced from the outside is also very high, the regeneration fluid can be introduced or supplemented by opening the working stop valve 33, closing the first circulation stop valve 47, and opening the second circulation stop valve 48.

[0092] Embodiment 5:

[0093] The embodiment of the present application discloses a method for reducing the concentration of adsorbate in a fluid to be treated by using a rotary wheel 1 adsorption system. The adsorption system of this embodiment can be implemented by using any one of the systems in embodiments 1-4.

[0094] The following steps are involved:

[0095] Rotating the rotor 1 so that a portion of a given volume of the rotor 1 passes successively through the working area 3, a plurality of buffer areas 4, a plurality of regeneration areas 5 and a recovery area 6 before returning to the working area 3;

[0096] Allowing the working fluid to pass through the runner 1 in the working area 3;

[0097] The regenerating fluid passes through the rotor 1 in the regeneration zone 5, and the flow direction of the regenerating fluid is opposite to that of the working fluid;

[0098] A part of the regenerated fluid is mixed with the fluid with recovered heat flowing out of the recovery zone 6 through a specific channel and then enters the buffer zone 4 together and passes through the rotor 1;

[0099] The fluid flowing out of the buffer zone 4 channel is divided into two flows, one part of the fluid is mixed with the regenerated fluid passing through the regeneration zone 5 through a specific channel and then discharged from the system together, or is discharged from the system directly through a specific channel; the other part flows through the recovery zone 6 to the next link.

[0100] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An incomplete cycle heat recovery wheel adsorption system, characterized in that: The invention comprises a rotor (1) having a rotating function and a regenerative adsorption capacity, wherein the spaces corresponding to the two axial end surfaces of the rotor (1) are sequentially divided into a working area (3), a plurality of buffer areas (4), a plurality of regeneration areas (5) and a recovery area (6) along the rotating direction, wherein the buffer areas (4) and the recovery area (6) are connected to each other and form at least one circulating flow channel (41), the working area (3) has a working flow channel (31) for fluid to pass through the rotor (1), the regeneration area (5) has a regeneration flow channel (51) for fluid to pass through the rotor (1), and the circulating flow channel (41) is connected to the working flow channel (31) and the regeneration flow channel (51). 1) is connected so that at least one of the circulation channels (41) forms an inflow and outflow balance, the spaces corresponding to the two axial end faces of the impeller (1) are respectively called the front side and the back side, wherein the side where the fluid of the working zone (3) enters the impeller (1) is the front side, the circulation channel (41) is connected to at least one of the front side part and the back side part of the regeneration channel (51), the buffer zone (4) on the back side of the impeller (1) is merged with the regeneration zone (5) on the back side; the fluid entering from the recovery zone (6) on the front side and passing through the impeller (1) to the recovery zone (6) on the back side merges with the fluid about to enter the regeneration zone (5) on the back side.

2. The incomplete cycle heat recovery wheel adsorption system according to claim 1 is characterized in that: The regeneration flow channel (51) on the back side is connected to the circulation flow channel (41) on the back side via an inflow branch (42), the circulation flow channel (41) on the front side is connected to the regeneration flow channel (51) on the front side via an outflow branch (43), an outflow flow control device (44) is provided on the outflow branch (43), and the circulation flow channel (41) on the front side is provided with a circulation conveying device (45) for increasing the flow rate and flow velocity on the passage from the impeller (1) to the outflow branch (43).

3. The incomplete cycle heat recovery wheel adsorption system according to claim 2 is characterized in that: The regeneration flow channel (51) on the positive side is matched with a regeneration conveying device (53), and the outflow branch channel (43) is located between the regeneration conveying device (53) and the rotating wheel (1).

4. The incomplete cycle heat recovery wheel adsorption system according to claim 1 is characterized in that: The regeneration flow channel (51) on the back side is connected to the circulation flow channel (41) on the back side through an inflow branch (42), the circulation flow channel (41) on the front side is provided with an independent outflow branch (43) for discharging fluid outward, and the circulation flow channel (41) on the front side is provided with a circulation conveying device (45) for increasing the flow rate and velocity on the passage from the impeller (1) to the outflow branch (43).

5. The incomplete cycle heat recovery wheel adsorption system according to claim 2 or 4, characterized in that: The regeneration flow channel (51) on the back side is matched with a heating device (52), and the inflow branch channel (42) is located between the heating device (52) and the rotor (1).

6. The incomplete cycle heat recovery wheel adsorption system according to claim 2 or 4, characterized in that: A working branch (32) is connected between the working flow channel (31) on the positive side and the circulation flow channel (41) on the positive side, the working branch (32) is matched with a working stop valve (33), and the circulation flow channel (41) is matched with a circulation check valve (49) in the flow area between the working branch (32) and the outflow branch to prevent the fluid from flowing from the working branch (32) to the outflow branch.

7. A method for reducing the concentration of adsorbate in a fluid to be treated by using the rotary adsorption system according to any one of claims 2 to 6, characterized in that: The following steps are involved: Rotating the rotor (1) so that a portion of a given volume of the rotor (1) passes successively through a working area (3), a plurality of buffer areas (4), a plurality of regeneration areas (5) and a recovery area (6) before returning to the working area (3); Allowing a working fluid to pass through the runner (1) in the working area (3); Allowing the regenerating fluid to pass through the rotor (1) in the regenerating zone (5), with the flow direction of the regenerating fluid being opposite to that of the working fluid; A portion of the regenerated fluid is mixed with the fluid with recovered heat flowing out of the recovery zone (6) through the circulation channel (41) and then enters the buffer zone (4) and passes through the rotor (1); the fluid flowing out of the buffer zone (4) channel is divided into two flow directions, one portion of the fluid is mixed with the regenerated fluid passing through the regeneration zone (5) through the outflow branch channel (43) and the regeneration channel (51) and then discharged from the system, or directly discharged from the system through the outflow branch channel (43); the other portion flows through the recovery zone (6) to the next link.

8. A method for reducing the concentration of adsorbate in a fluid to be treated by using a rotary adsorption system according to claim 7, characterized in that: At least one of the concentrations of water vapor, volatile organic matter (VOC), and nitrogen oxides in the working fluid is reduced by passing through the rotor (1) via the working zone (3).

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