Single, double runner adaptive switching of waste heat recovery dehumidification device and method

Abstract

The application discloses a single / dual-rotor adaptive switching waste heat recovery and dehumidification device and method, and relates to the technical field of waste heat recovery and dehumidification, which comprises a system support, a control module, a primary filter, a first surface cooler, a first dehumidification rotor device, a second surface cooler, a second dehumidification rotor device, a third surface cooler, a bypass branch and a high-temperature heat pump circuit. According to the system wet load and the dew point of the outlet of the first dehumidification rotor device, the operation mode is adaptively switched; in the case of small wet load, single-rotor operation is adopted; in the case of medium wet load, the second rotor is put into low-speed or intermittent operation; and in the case of large wet load, dual-rotor series deep dehumidification is adopted, and the shortest operation time of the rotor is set to prevent mode oscillation. The high-temperature heat pump exhaust heat recovery evaporator is used to recover the regeneration exhaust heat on the regeneration side, and the high-temperature heat pump condenser supplies heat to the regeneration air; when the heat pump capacity is insufficient, steam coil heating is used. The application takes into account deep dehumidification and energy-saving operation, the rotor module is convenient to disassemble and assemble, the belt deviation can be inhibited, vibration and noise can be reduced, and the application is suitable for low-dew-point dehumidification scenes.

Description

Technical Field

[0001] This invention relates to the field of waste heat recovery and dehumidification technology, specifically to a waste heat recovery and dehumidification device and method with adaptive switching between single and dual rotors. Background Technology

[0002] Rotary dehumidification systems are widely used in processes with stringent requirements for air dew point, such as lithium battery manufacturing, pharmaceutical manufacturing, and electronic cleanrooms. They rely on the dehumidification rotor to adsorb water vapor and high-temperature hot air to desorb and regenerate it to produce low dew point air.

[0003] In terms of regenerative heat source utilization, the regeneration exhaust air of rotary dehumidifiers is high-temperature and high-humidity waste gas, carrying considerable sensible heat and latent heat of water vapor condensation. Most existing equipment directly vents the regeneration exhaust air, failing to recover its heat. The regeneration heat source mainly relies on steam or electric heating, resulting in significant energy waste. A few dehumidifiers equipped with heat pump waste heat recovery systems lack heat source allocation adaptation for different operating modes (single-rotor and dual-rotor). When both rotors regenerate simultaneously, insufficient heat pump power supply can easily occur, necessitating increased steam supplementation and further raising operating costs. Furthermore, the lack of clear hierarchical priority in heat source regulation leads to inadequate system response during load fluctuations.

[0004] In addition, existing dehumidifying impellers generally adopt an integral fixed assembly structure, making the disassembly and assembly process of the internal purification filling components complex. Replacing the internal adsorption granule consumables requires disassembling a large number of transmission and sealing parts, resulting in a large workload for inspection and maintenance. At the same time, the impeller relies on belt drive to rotate, and the drive belt is prone to deviation during long-term operation, accelerating belt wear and causing significant equipment vibration and noise problems. The existing structure lacks an integrated structure that can simultaneously achieve module locking and belt guiding and limiting, resulting in poor equipment operation stability and high maintenance costs in the later stages.

[0005] Therefore, there is an urgent need for a waste heat recovery dehumidification device and method that can adaptively switch between single / dual rotor operation modes according to the wet load, efficiently recover and regenerate exhaust waste heat, and take into account the convenience of disassembly and maintenance. Summary of the Invention

[0006] 1. The technical problem to be solved by the present invention

[0007] The purpose of this invention is to propose a waste heat recovery dehumidification device and method with adaptive switching between single and dual rotors to solve the following problems existing in the prior art: (1) Traditional single-rotor equipment is difficult to cope with the deep dehumidification requirements of large wet load. Conventional dual-rotor equipment cannot dynamically switch the second rotor according to the wet load. The air resistance and regeneration energy consumption are high under low load. At the same time, it lacks adaptive closed-loop switching logic based on dew point and wet load, which is prone to mode oscillation. The sensible heat and latent heat of regeneration exhaust are not fully recovered. The heat pump and steam supplementary heating lack graded adjustment strategies. The heat source matching is poor under different rotor operation modes, resulting in high overall energy consumption.

[0008] (2) Traditional rotary purification filling modules are complicated to disassemble and assemble, and the workload of replacing internal particle consumables is large; belt drives lack a dedicated guide and limit structure, and the belt is prone to deviation and wear during operation, resulting in large equipment vibration and noise. There is no integrated structure that can take into account both module locking and belt guidance, and the equipment operation and maintenance and stability are insufficient.

[0009] 2. Technical Solution To achieve the above objectives, the present invention provides the following technical solution: a waste heat recovery dehumidification device with adaptive switching between single and dual dehumidifiers, comprising a system support frame, on which a control module, a primary filter, a first surface cooler, a first dehumidification dehumidification wheel device, a second surface cooler, a second dehumidification dehumidification wheel device, and a third surface cooler are fixedly installed; the air outlet of the primary filter is connected to the air inlet of the first surface cooler, the air outlet of the first surface cooler is connected to the dehumidification channel of the first dehumidification wheel device via a fresh air fan, the dehumidification channel of the first dehumidification wheel device is connected to the air inlet of the second surface cooler via a blower and a medium-efficiency filter, the air outlet of the second surface cooler is connected to the dehumidification channel of the second dehumidification wheel device, and the air outlet of the second dehumidification wheel device is connected to the air inlet of the third surface cooler; both the first and second dehumidification wheel devices include a dehumidification channel and a regeneration channel, and are respectively provided with independent drive mechanisms.

[0010] As an improvement, a high-temperature heat pump circuit is fixedly installed on the system bracket, and a bypass branch pipe is connected in parallel between the air outlet of the second surface cooler and the air inlet of the third surface cooler. A bypass ventilation valve is installed on the bypass branch pipe. The regeneration air pipeline of the high-temperature heat pump circuit is connected to the regeneration channels of the first dehumidification rotor device and the second dehumidification rotor device, respectively.

[0011] As an improvement, the high-temperature heat pump circuit includes a compressor, a high-temperature heat pump condenser, a high-temperature heat pump exhaust waste heat recovery evaporator, a regeneration fan, and a first steam coil and a second steam coil respectively installed on the regeneration air pipelines of the two dehumidification rotor devices.

[0012] As an improvement, the first dehumidifying impeller device includes an impeller disc with a mounting groove circumferentially arranged. A conical purification filling module is detachably installed in the mounting groove. A locking groove is formed on the upper surface of the middle part of the conical purification filling module. An arc-shaped belt guide plate is slidably connected in the locking groove. A belt groove is formed in the middle of the arc-shaped belt guide plate. A pressure plate is rotatably connected to the outer circumferential side of the arc-shaped belt guide plate. A top cone is rotatably connected to the end of the pressure plate away from the arc-shaped belt guide plate. The top cone passes through and is slidably connected to the impeller disc and the locking groove. An auxiliary spring is sleeved on the outer surface of the top cone. One end of the auxiliary spring is fixedly connected to the locking groove.

[0013] As an improvement, a screw is rotatably connected to the middle of the belt groove, the bottom end of the screw is threadedly connected to the locking groove, a tension spring is sleeved on the outer surface of the lower end of the screw, and the two ends of the tension spring are fixedly connected to the belt groove and the locking groove respectively. The conical purification filling module is filled with adsorbent purification particles.

[0014] Furthermore, a waste heat recovery dehumidification method with adaptive switching between single and dual impellers is proposed, including: S1. Process air pretreatment: After the fresh air and / or return air are mixed, they pass through the primary filter and then the first surface cooler for pre-cooling and dehumidification. The air temperature and dew point drop, and the condensed water vapor is discharged from the water collection tray. The pretreated air enters the first dehumidification rotor device to complete the first-stage adsorption dehumidification. S2. Moisture load determination and mode switching: The controller determines the operating condition based on the dew point at the outlet of the first dehumidification impeller and the system moisture load signal collected by the sensor group, and executes single impeller, medium moisture load dual impeller or high moisture load dual impeller series mode according to the preset threshold.

[0015] When the system wet load is lower than the first threshold, or when the outlet dew point of the first dehumidifying rotor meets the supply air dew point requirements, the low wet load mode is executed: the main processing air path of the second dehumidifying rotor is closed, the bypass branch is opened, and only the first dehumidifying rotor is put into processing air operation; the high-temperature heat pump circuit recovers the sensible heat of the regenerated exhaust air through the high-temperature heat pump exhaust waste heat recovery evaporator, and recovers the latent heat of condensation when the condensation conditions are met, and uses the recovered heat as the regeneration heat source of the first dehumidifying rotor, and the steam coil is closed or a small amount of supplementary heat is performed; When the system moisture load is between the first and second thresholds, or when the outlet dew point of the first dehumidifying rotor is continuously higher than the set supply air dew point for a preset duration, the medium moisture load mode is executed: first, the regeneration air path corresponding to the second dehumidifying rotor is opened and the high-temperature heat pump circuit is started. After the regeneration temperature reaches the set range, the bypass ventilation valve is closed and the main processing air path of the second dehumidifying rotor is opened. Under the medium moisture load condition, the first dehumidifying rotor runs continuously, and the second dehumidifying rotor runs at low speed or intermittently. When the system supply air dew point still does not meet the set requirements under the medium moisture load mode, the high moisture load mode is executed, so that the two dehumidifying rotors are connected in series and the second surface cooler is used for pre-cooling again. After that, the air is sent out after the supply air temperature is corrected by the third surface cooler. When the high-temperature heat pump capacity is insufficient, the corresponding steam coil is started to supplement the regenerated air temperature to the target regeneration temperature. S3, Reduce load and exit dual-rotor mode: When the system wet load decreases, the controller first reduces the speed of the second dehumidification rotor device; when the operating conditions reach the exit condition, the bypass branch is opened and the main processing air path of the second dehumidification rotor device is closed. After the airflow stabilizes, the regeneration air path of the second dehumidification rotor device is closed and its drive mechanism is stopped.

[0016] The first threshold is the low-load threshold for exiting the dual-rotor mode, and the second threshold is the high-load threshold for starting the second dehumidifying rotor device. The second threshold is greater than the first threshold. Mode switching delay and the shortest running time of each rotor are also set to avoid frequent mode start-stop.

[0017] As an improvement, the system adjustment priority order is as follows: speed adjustment of the first and second dehumidification impeller devices; frequency adjustment of the high-temperature heat pump compressor; regeneration air volume adjustment; and steam coil heat replenishment adjustment.

[0018] As an improvement, the regeneration process is as follows: the regeneration exhaust air first passes through the high-temperature heat pump exhaust waste heat recovery evaporator to recover waste heat and heat the heat pump working fluid; the regeneration air is sent to the high-temperature heat pump condenser by the regeneration fan, and after being heated by the high-temperature heat pump condenser, it forms high-temperature regeneration air, which is sent to the regeneration zone of the corresponding dehumidification wheel to complete the wheel regeneration; when the temperature of the regeneration air at the outlet of the high-temperature heat pump condenser is lower than the target regeneration temperature, it is supplemented with heat through the steam coil.

[0019] Compared with the prior art, the waste heat recovery dehumidification device and method with single and dual impeller adaptive switching provided by the present invention has the following beneficial effects: (1) This invention enables single and dual dehumidifiers to adaptively switch operating modes based on the wet load. The system uses the outlet dew point of the first dehumidifier and the system wet load as the basis for judgment, distinguishing between three wet load conditions: small, medium, and large. Under small wet load, the second dehumidifier bypasses, and only the first dehumidifier operates. Under medium wet load, the second dehumidifier is activated and operates at low speed or intermittently. Under large wet load, the two dehumidifiers are connected in series for deep dehumidification. At the same time, the mode switching delay and the shortest running time of the dehumidifier are set to avoid frequent start-stop oscillations of the mode, and the equipment is switched on and off as needed. Under the premise of ensuring that the supply air dew point meets the standard, the system wind resistance and regeneration energy consumption are reduced, and the dehumidification performance and energy saving are taken into account.

[0020] (2) This invention constructs a high-temperature heat pump waste heat recovery and regeneration system adaptable to multiple modes. The sensible heat of the regeneration exhaust air is recovered using a high-temperature heat pump exhaust waste heat recovery evaporator, and the latent heat of condensation is recovered when condensation conditions are met. The recovered heat is used to power the heat pump system, and then the high-temperature heat pump condenser supplies heat to the regeneration air. Heat source supply is adapted for different operating states of single-rotor and double-rotor systems. A clear system adjustment priority sequence is set, prioritizing the adjustment of the rotor speed, followed by the adjustment of the heat pump compressor frequency and regeneration air volume, and finally starting the steam coil for supplementary heating. Steam auxiliary heating is only activated when the heat pump capacity is insufficient, reducing steam consumption and lowering equipment operating costs.

[0021] (3) The present invention modularly integrates the internal structure of the dehumidifying impeller. A conical purification filling module with a locking structure is designed. With the help of the arc-shaped belt guide plate, the top cone and the spring assembly, the arc-shaped belt guide plate can be pressed to complete the unlocking and locking. The filling module can be quickly disassembled and assembled, which is convenient for the replacement and maintenance of the internal adsorbed purification particles. The arc-shaped belt guide plate integrates the belt groove to realize the limiting and guiding of the transmission belt, avoid belt deviation and wear, and provide buffering and vibration reduction through the elastic component, reducing the vibration and noise of the equipment operation, simplifying the later maintenance work, and improving the overall operation stability of the machine. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is an auxiliary schematic diagram of the three-dimensional structure of the present invention; Figure 3 This is a schematic diagram of the structural connection relationship of the first dehumidification rotor device of the present invention; Figure 4 This is a schematic diagram showing the connection relationship of a partially half-sectioned structure of the first dehumidification rotor device of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle; Figure 6 This is a schematic diagram of the structural connection relationship of the first dehumidification rotor device of the present invention in its disassembled state; Figure 7This is a schematic diagram of the system process architecture of the present invention.

[0023] In the picture: 1. System support frame; 2. Control module; 3. Primary filter; 4. First surface cooler; 5. First dehumidification impeller; 6. Second surface cooler; 7. Third surface cooler; 8. Second dehumidification impeller; 9. High-temperature heat pump exhaust waste heat recovery evaporator.

[0024] 51. Rotary disc; 52. Conical purification filling module; 53. Locking groove; 54. Arc-shaped belt guide plate; 55. Belt groove; 56. Pressure plate; 57. Top cone; 58. Auxiliary spring; 59. Screw. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0027] Example 1, please refer to Figures 1 to 7 As shown: To address the technical problems existing in the prior art, this application provides a waste heat recovery dehumidification device with adaptive switching between single and dual dehumidifier rotors. The device includes a system support 1, a control module 2 fixedly mounted on the outer side of the system support 1, and a primary filter 3 fixedly mounted in the middle of the side of the system support 1 closest to the control module 2. The air outlet of the primary filter 3 is fixedly connected to a first surface cooler 4, and the side of the first surface cooler 4 furthest from the primary filter 3 is connected to a fresh air unit. The air outlet of the fresh air unit is connected to the dehumidification channel inlet of the first dehumidification rotor device 5.

[0028] The first dehumidification rotor device 5 is divided into a dehumidification channel and a regeneration channel. The airflow output from the fresh air unit enters the dehumidification channel of the first dehumidification rotor device 5. The air outlet of the dehumidification channel of the first dehumidification rotor device 5 is connected to the supply fan, and the air outlet of the supply fan is sequentially connected to the medium-efficiency filter and the second surface cooler 6. The air outlet of the second surface cooler 6 is connected to the dehumidification channel inlet of the second dehumidification rotor device 8. The first dehumidification rotor device 5 and the second dehumidification rotor device 8 have the same structure, size, and function. The dehumidification channel outlet of the second dehumidification rotor device 8 is connected to the third surface cooler 7, forming a multi-stage air handling path.

[0029] A high-temperature heat pump circuit is fixedly installed on the upper end of the system bracket 1. A bypass branch pipe is connected in parallel between the air outlet of the second surface cooler 6 and the air inlet of the third surface cooler 7. A bypass ventilation valve is installed on the bypass branch pipe. The regeneration air pipeline of the high-temperature heat pump circuit is connected to the regeneration channels of the first dehumidification rotor device 5 and the second dehumidification rotor device 8 respectively, providing heat source support for the rotor regeneration operation.

[0030] The high-temperature heat pump circuit includes a compressor, a regeneration fan, a high-temperature heat pump condenser, and a high-temperature heat pump exhaust waste heat recovery evaporator 9. A first steam coil and a second steam coil are respectively installed on the regeneration air pipelines of the two rotors. The high-temperature heat pump exhaust waste heat recovery evaporator 9 is located in the high-temperature and high-humidity regeneration exhaust air channel to recover the sensible heat of the exhaust air; when the evaporator surface temperature is lower than the exhaust air dew point temperature, it can also recover the latent heat of condensation of water vapor in the air. The recovered heat is used to power the heat pump system, and then the high-temperature heat pump condenser heats the regeneration air to meet the rotor regeneration temperature requirements.

[0031] Each of the two dehumidification impeller units is equipped with an independent drive mechanism, speed detection unit, and regeneration air valve. The processing air path of the second dehumidification impeller unit 8 is also equipped with a main air valve and a bypass branch air valve, enabling switching between single-impeller and dual-impeller modes. The equipment retains the structure of the first and second steam coils, which can serve as an auxiliary heat source during equipment startup, extreme operating conditions, or when the heat pump heating capacity is insufficient, ensuring stable equipment operation. Simultaneously, this unit is equipped with temperature and humidity sensors, dew point sensors, airflow sensors, and regeneration temperature sensors. All sensor signals are connected to the control module, and the controller enables unified regulation of operating parameters.

[0032] The first dehumidification rotary device 5 includes a rotary disc 51, on which mounting grooves are evenly distributed around the circumference. A conical purification filling module 52 is detachably assembled into the mounting groove. A locking groove 53 is formed in the middle of the upper surface of the conical purification filling module 52. An arc-shaped belt guide plate 54 is slidably mounted inside the locking groove 53. A belt groove 55 for belt positioning and guidance is formed in the middle of the arc-shaped belt guide plate 54.

[0033] A pressure plate 56 is rotatably connected to the outer periphery of the arc-shaped belt guide plate 54. A top cone 57 is rotatably mounted on the end of the pressure plate 56 away from the arc-shaped belt guide plate 54. The top cone 57 passes through and is slidably connected to the inside of the turntable 51 and the locking groove 53. An auxiliary spring 58 is sleeved on the outer surface of the top cone 57. One end of the auxiliary spring 58 is fixedly installed inside the locking groove 53, which can realize the elastic reset and clamping fixation of the top cone 57.

[0034] A screw 59 is rotatably mounted in the middle of the belt groove 55, and the bottom end of the screw 59 is threadedly locked to the locking groove 53; a tension spring is sleeved on the outer side of the lower end of the screw 59, and the two ends of the tension spring are fixedly connected to the belt groove 55 and the locking groove 53 respectively. The conical purification filling module 52 is filled with adsorption and purification particles to adsorb water vapor in the air.

[0035] By pressing the arc-shaped belt guide plate 54, the top cone 57 can be extended and retracted in conjunction, enabling the rapid assembly and locking of the conical purification filling module 52 and the rotary disc 51. Simultaneously, the belt groove 55 can limit and guide the drive belt, effectively preventing belt deviation and misalignment. The screw 59 is embedded in the middle of the belt groove 55, with its top surface lower than the upper surface of the belt groove 55, thus avoiding interference with belt operation.

[0036] This solution, by adding an arc-shaped belt guide plate 54, not only ensures the stable locking of the conical purification filling module 52, but also provides cushioning and vibration reduction during the operation of the first dehumidification rotor device 5 through its elastic components, thereby reducing equipment operating noise and vibration losses. Simultaneously, the conical purification filling module 52 adopts a modular assembly structure, simplifying the subsequent replacement of adsorbed purification particles and equipment maintenance procedures, improving the ease of disassembly and assembly and maintenance efficiency. Through structural optimization of the first dehumidification rotor device 5, the equipment combines the advantages of rapid modular assembly, precise locking, and cushioning and vibration reduction.

[0037] This application also provides a control method for a waste heat recovery dehumidification device that adaptively switches between single and dual rotors, the specific steps of which are as follows: S1. After the fresh air and / or return air are mixed, they first pass through the primary filter 3 for primary filtration, and then pass through the first surface cooler 4 for pre-cooling and dehumidification, simultaneously reducing the air temperature and dew point temperature. After some of the water vapor in the air condenses, it is discharged uniformly from the water collection tray of the first surface cooler 4. The pre-treated air enters the first dehumidification impeller device 5 to complete the first-stage adsorption dehumidification treatment.

[0038] S2. The equipment adaptively switches operating modes based on the system's moisture load and the dew point at the outlet of the first dehumidification rotor device 5: When the system's moisture load increases and the dehumidification demand is high, the second surface cooler 6 and the second dehumidification rotor device 8 are put into series operation to perform deep dehumidification on the air that has passed through the first stage of dehumidification, and finally the supply air temperature is corrected by the terminal third surface cooler 7; when the system's moisture load is low, the bypass passage corresponding to the second dehumidification rotor device 8 is opened, and only the first dehumidification rotor device 5 is kept running independently to reduce system wind resistance and regeneration heat consumption.

[0039] S3. The regeneration side airflow adopts a waste heat recovery energy-saving mode: the regeneration exhaust air first flows through the high-temperature heat pump exhaust waste heat recovery evaporator 9, where the evaporator recovers the sensible heat of the exhaust air and, when the condensation conditions are met, recovers the latent heat of condensation to drive the heat pump system; the regeneration air is sent to the high-temperature heat pump condenser by the regeneration fan, and after being heated by the high-temperature heat pump condenser, it is sent to the regeneration area of ​​the dehumidification rotor to complete the regeneration and reset of the adsorption medium. When the heating capacity of the high-temperature heat pump condenser is insufficient, the heat source is supplemented through the corresponding steam coil to ensure the stability of the regeneration temperature. The controller collects operating parameters such as the system's air outlet dew point, air volume, air temperature and humidity, pipeline pressure difference, and regeneration temperature in real time, and automatically completes the adaptive switching between single-rotor and dual-rotor operation modes of the first dehumidification rotor device 5 and the second dehumidification rotor device 8, taking into account both dehumidification effect and operating energy efficiency.

[0040] Example 2: This embodiment is based on Embodiment 1 and focuses on describing the on-site assembly, debugging, and operation process of the device. The specific details are as follows: First, position, level, and secure the system bracket 1 in the machine room. Securely install the control module 2 on the outside of the system bracket 1. Complete the wiring for both high and low voltage circuits. Connect the dew point sensor, temperature and humidity sensor, airflow sensor, and regeneration temperature sensor to the control module 2. Along the process airflow direction, install the primary filter 3 and the first surface cooler 4 sequentially on one side of the bracket. The first surface cooler 4 is equipped with a water collection tray and a drain pipe to drain the condensate to the machine room drainage point. The air outlet of the first surface cooler 4 is connected to the fresh air unit, and the fresh air unit's outlet pipe is connected to the dehumidification channel inlet of the first dehumidification rotor device 5. The outlet of the dehumidification channel of the first dehumidification rotor device 5 is connected to a blower. The blower outlet air is connected in series with a medium-efficiency filter and the second surface cooler 6. The outlet of the second surface cooler 6 is provided with two pipelines: one is the main treatment air path, which is connected to the inlet of the dehumidification channel of the second dehumidification rotor device 8; the other is a bypass branch pipeline, which is equipped with a bypass ventilation valve and connected to the front end of the third surface cooler 7. The outlet of the dehumidification channel of the second dehumidification rotor device 8 is connected to the third surface cooler 7, and the outlet air of the third surface cooler 7 is sent to the target process room as the system supply air.

[0041] Further assembly of the high-temperature heat pump regeneration circuit is carried out, as detailed below: First, a high-temperature heat pump circuit assembly is installed on the upper part of the system bracket 1: the high-temperature heat pump exhaust waste heat recovery evaporator 9 is arranged in the rotary regeneration exhaust duct; the regeneration air pipeline is sequentially equipped with a regeneration fan, a high-temperature heat pump condenser, and a first steam coil and a second steam coil corresponding to the two rotary wheels respectively.

[0042] Further piping connections are made: the regeneration air piping of the high-temperature heat pump circuit is connected to the independent regeneration channels of the first dehumidification rotor device 5 and the second dehumidification rotor device 8 respectively; the regeneration exhaust air duct first passes through the high-temperature heat pump exhaust waste heat recovery evaporator 9, and then is discharged externally; the steam coil is connected to the plant's steam source and equipped with an electric regulating valve. The bypass branch piping between the second surface cooler 6 and the second dehumidification rotor device 8 is synchronously routed, and the bypass ventilation valve signal is connected to the control module 2. Each rotor is equipped with an independent drive motor, speed detection unit, and regeneration air valve.

[0043] Modular component assembly inside the dehumidification rotor device: This solution takes the first dehumidification rotor device 5 as an example, as detailed below: Align the circumferential mounting groove of the rotary disk 51 with the conical purification filling module 52, and embed the conical purification filling module 52 into the mounting groove; the conical purification filling module 52 is pre-filled with adsorption and purification particles.

[0044] Place the arc-shaped belt guide plate 54 into the locking groove 53. The pressure plate 56, the top cone 57, and the auxiliary spring 58 are pre-installed around the arc-shaped belt guide plate 54. Screw the screw 59 downwards so that the bottom end of the screw 59 is threadedly locked with the locking groove 53. A tension spring is sleeved on the lower end of the screw 59, and the two ends of the spring are connected to the belt groove 55 and the locking groove 53 respectively.

[0045] Press down on the arc-shaped belt guide plate 54, and the pressure plate 56 pushes the top cone 57 to retract against the elastic force of the auxiliary spring 58; after the conical purification filling module 52 is installed in place, release the arc-shaped belt guide plate 54, and the auxiliary spring 58 pushes the top cone 57 to pop out, so that the top cone 57 is locked into the turntable 51 and the locking groove 53, thus completing the locking of the conical purification filling module 52; the drive belt is embedded in the belt groove 55, and the belt groove 55 limits and guides the transmission belt to prevent the belt from running off-center.

[0046] The internal modules of the second dehumidification rotor device 8 were assembled according to the same assembly process.

[0047] Post-maintenance implementation: When inspecting and replacing the adsorption and purification particles, press down the arc-shaped belt guide plate 54, the top cone 57 retracts and unlocks, and the conical purification filling module 52 can be directly removed. After replacing the particles, reinstall and lock it.

[0048] The system debugging process begins as follows: Check the operation of all air valves, motors, heat pump compressors, and steam regulating valve actuators; verify the zero point and range of all dew point, temperature and humidity, and regeneration temperature sensors; preset parameters in control module 2: the first threshold is the threshold for determining low-humidity loads to exit the dual-rotor mode, and the second threshold is the threshold for starting the second dehumidification rotor device 8, with the second threshold being greater than the first threshold; set the mode switching delay, the shortest continuous running time of each dehumidification rotor, and the system adjustment priority, wherein the system adjustment priority is: rotor speed → high-temperature heat pump compressor frequency → regeneration air volume → steam coil reheating; Rotor target regeneration temperature and supply air dew point setpoints.

[0049] Manual single-step test: Single rotor mode, dual rotor series mode, bypass mode, heat pump + steam supplementation mode, confirm that the air valve switching, rotor speed adjustment, heat pump load increase / decrease, and steam supplementation can all respond normally.

[0050] The specific process control methods in this plan are as follows: S1 wind pretreatment implementation Fresh air and / or indoor return air are mixed. The mixed airflow first passes through the pre-filter 3 to filter out large particulate impurities. It then enters the first surface cooler 4, where cold water is introduced to pre-cool the air. Water vapor in the air condenses and is discharged into the water collection tray. After pre-cooling and lowering the dew point, the air is sent into the dehumidification channel of the first dehumidification rotor device 5 to complete the first-stage adsorption dehumidification. The air after the first-stage dehumidification is sent out by the blower and flows through the medium-efficiency filter for further filtration.

[0051] S2. Implementation of Wet Load Determination and Adaptive Mode Switching The control module 2 reads the dew point at the outlet of the first dehumidification impeller device 5, the system wet load, and the regeneration temperature collected by the sensor in real time, compares them with the preset threshold, and executes the operation under three conditions: low wet load, medium wet load, and high wet load.

[0052] In low-humidity load mode, only one impeller operates. Triggering conditions: The system wet load is lower than the first threshold, or the dew point at the outlet of the first dehumidification impeller device 5 has met the process air supply dew point.

[0053] The specific implementation steps are as follows: The control module 2 outputs a signal to first close the main processing air path leading to the second dehumidification impeller device 8 and open the bypass ventilation valve of the bypass branch pipe. After the airflow stabilizes, it closes the regeneration air valve corresponding to the second dehumidification impeller device 8 and stops the drive mechanism of the second dehumidification impeller device 8.

[0054] Only the first dehumidification rotor device 5 is in operation.

[0055] Regeneration process: Regeneration exhaust air flows through the high-temperature heat pump exhaust waste heat recovery evaporator 9, recovering the sensible heat of the exhaust air and, when condensation conditions are met, recovering the latent heat of condensation of water vapor to heat the heat pump working fluid; the regeneration fan drives the regeneration air through the high-temperature heat pump condenser for heating, generating high-temperature regeneration air which is then sent into the regeneration channel of the first dehumidification impeller device 5 to achieve desorption and regeneration of the impeller adsorption medium. At this time, the first steam coil is closed; if the heat pump heating capacity is insufficient, the first steam coil can be opened for supplementary heating. The air after primary dehumidification goes through a bypass branch to the third surface cooler 7, where the third surface cooler 7 completes the supply air temperature correction and delivers process air that meets the temperature and humidity requirements.

[0056] Medium-humidity load mode: Dual impellers are involved, with the second impeller operating at low speed or intermittently. Triggering conditions: The system wet load is between the first threshold and the second threshold, or the dew point at the outlet of the first dehumidification impeller 5 exceeds the preset time and is higher than the set supply air dew point.

[0057] The specific implementation steps are as follows: First, control module 2 prioritizes opening the regeneration air path corresponding to the second dehumidification rotor device 8, starts the high-temperature heat pump circuit, and continuously monitors the regeneration air temperature; after the regeneration temperature rises to the target regeneration temperature range, the air valve is switched.

[0058] Air valve switching: Close the bypass branch air valve and open the main treatment air path leading to the second dehumidification impeller device 8.

[0059] The first dehumidification rotor device 5 operates continuously; the control module 2 outputs a low speed command, and the second dehumidification rotor device 8 operates continuously at low speed, or operates intermittently according to a set cycle.

[0060] Airflow path: After primary dehumidification, the air first enters the second surface cooler 6 for further pre-cooling, then enters the second dehumidification impeller device 8 for secondary dehumidification; afterwards, it enters the third surface cooler 7 to adjust the supply air temperature and is then sent out. Regeneration circuit: The high-temperature heat pump condenser provides high-temperature regeneration air to the regeneration channels of the two impellers; if the heat pump output capacity is insufficient, the corresponding first steam coil and / or second steam coil regulating valve is opened to supplement heat and ensure that the regeneration temperature meets the standard.

[0061] High humidity load mode: Dual-rotor series deep dehumidification Triggering conditions: The system supply air dew point still does not meet the set requirements under medium humidity load mode, or the system humidity load continues to increase.

[0062] The specific implementation steps are as follows: First, the regeneration circuit is kept running. The first dehumidification impeller device 5 and the second dehumidification impeller device 8 increase their speed according to the control command, and the dehumidification channels of the two impellers work in series.

[0063] Mixing fresh air and / or return air → primary filter 3 → first surface cooler 4 pre-cooling → first dehumidification impeller 5 primary adsorption dehumidification → air supply fan → medium efficiency filter → second surface cooler 6 pre-cooling and cooling again → second dehumidification impeller 8 secondary series dehumidification → third surface cooler 7 temperature correction → process air supply.

[0064] The heat pump increases its load based on the regeneration temperature requirement. If the regeneration temperature does not reach the set value, the corresponding steam coil is activated or its capacity increased to supplement heat, ensuring the heat source needs for simultaneous regeneration of both dehumidifiers. Strict priority control is enforced: first, the speed of the two dehumidifiers is adjusted; after the speed reaches the set upper limit, the frequency of the high-temperature heat pump compressor is increased; after the compressor frequency reaches the upper limit, the regeneration fan is adjusted to change the regeneration airflow; after the regeneration airflow reaches the set upper limit, the steam coil is adjusted to supplement heat.

[0065] S3. Implementation process of reducing load and exiting the dual-wheel drive mode. As the indoor humidity load gradually decreases, and control module 2 detects that the dew point at the system's air outlet remains better than the set target, it executes the exit process for the dual-rotor system. First, gradually reduce the speed of the second dehumidification rotor 8; when the operating condition returns to the low humidity load judgment condition, open the bypass branch and close the main processing air path of the second dehumidification rotor 8; after the airflow stabilizes, close the regeneration air valve corresponding to the second dehumidification rotor 8 and stop the second rotor drive motor; the system returns to the single rotor operation mode. Logic protection: Force the execution of mode switching delay and the shortest rotor running time, preventing repeated switching in and out of the dual rotor due to short-term fluctuations in dew point, thus avoiding mode oscillation.

[0066] When the high-temperature heat pump circuit fails or is in an extreme high-humidity condition, and the heat pump waste heat recovery capacity is insufficient to provide the heat required for regeneration, the control module 2 automatically increases the opening of the corresponding steam coil. The steam coil outputs heat to raise the regenerated air to the target temperature of the rotor regeneration, ensuring uninterrupted dehumidification.

[0067] Please refer to the above work process. Figures 1 to 7 .

[0068] It should be noted that the term "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0069] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention; the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A waste heat recovery dehumidification device with adaptive switching between single and dual impellers, characterized in that, The system includes a system bracket (1), on which a control module (2), a primary filter (3), a first surface cooler (4), a first dehumidification impeller (5), a second surface cooler (6), a second dehumidification impeller (8), and a third surface cooler (7) are fixedly installed. The air outlet of the primary filter (3) is connected to the air inlet of the first surface cooler (4), and the air outlet of the first surface cooler (4) is connected to the dehumidification channel of the first dehumidification impeller (5) via a fresh air fan. The first dehumidification impeller (5) dehumidifies... The wet passage is connected to the air inlet of the second surface cooler (6) via a blower and a medium-efficiency filter. The air outlet of the second surface cooler (6) is connected to the dehumidification passage of the second dehumidification impeller device (8). The air outlet of the second dehumidification impeller device (8) is connected to the air inlet of the third surface cooler (7). The first dehumidification impeller device (5) and the second dehumidification impeller device (8) both include a dehumidification passage and a regeneration passage, and are respectively provided with independent drive mechanisms. The primary filter (3) is used to receive the process air after the fresh air and / or return air are mixed.

2. The waste heat recovery and dehumidification device according to claim 1, characterized in that, A bypass branch pipe is provided in parallel between the air outlet of the second surface cooler (6) and the air inlet of the third surface cooler (7), and a bypass ventilation valve is provided on the bypass branch pipe; a high-temperature heat pump circuit is fixedly installed on the system bracket (1), and the regeneration air pipeline of the high-temperature heat pump circuit is connected to the regeneration channels of the first dehumidification rotor device (5) and the second dehumidification rotor device (8).

3. The waste heat recovery dehumidification device according to claim 2, characterized in that, The high-temperature heat pump circuit includes a compressor, a high-temperature heat pump condenser, a high-temperature heat pump exhaust waste heat recovery evaporator (9), and a regeneration fan; the first steam coil and the second steam coil are respectively installed on the regeneration air pipelines corresponding to the first dehumidification impeller device (5) and the second dehumidification impeller device (8), and are used to supplement heat when the high-temperature heat pump heating capacity is insufficient.

4. The waste heat recovery dehumidification device according to claim 1, characterized in that, The first dehumidifying rotary device (5) includes a rotary disc (51). The rotary disc (51) is provided with a mounting groove in the circumference. A conical purification filling module (52) is detachably installed in the mounting groove. A locking groove (53) is provided on the upper surface of the middle part of the conical purification filling module (52). An arc-shaped belt guide plate (54) is slidably connected in the locking groove (53). A belt groove (55) is provided in the middle part of the arc-shaped belt guide plate (54). A pressure plate (56) is rotatably connected to the outer circumferential side of the arc-shaped belt guide plate (54). A top cone (57) is rotatably connected to the end of the pressure plate (56) away from the arc-shaped belt guide plate (54). The top cone (57) passes through and is slidably connected to the rotary disc (51) and the locking groove (53). An auxiliary spring (58) is sleeved on the outer surface of the top cone (57). One end of the auxiliary spring (58) is fixedly connected to the locking groove (53).

5. The waste heat recovery and dehumidification device according to claim 4, characterized in that, A screw (59) is rotatably connected to the middle of the belt groove (55). The bottom end of the screw (59) is threadedly connected to the locking groove (53). A tension spring is sleeved on the outer surface of the lower end of the screw (59). The two ends of the tension spring are fixedly connected to the belt groove (55) and the locking groove (53) respectively. The conical purification filling module (52) is filled with adsorbent purification particles.

6. A waste heat recovery dehumidification method with adaptive switching between single and dual impellers, employing the waste heat recovery dehumidification device according to any one of claims 1 to 5, characterized in that, include: S1. Process air pretreatment: After the fresh air and / or return air are mixed, they pass through the primary filter (3) and then through the first surface cooler (4) for pre-cooling and dehumidification. The air temperature and dew point drop, and the condensed water vapor is discharged from the water collection tray. The pretreated air enters the first dehumidification wheel device (5) to complete the first-stage adsorption dehumidification. S2. Wet load determination and mode switching: The controller determines the operating condition based on the outlet dew point of the first dehumidification impeller (5) and the system wet load signal collected by the sensor group. S3, Reduce load and exit dual-rotor mode: When the system wet load decreases, the controller first reduces the speed of the second dehumidification rotor device (8); when the operating condition reaches the exit condition, the bypass branch is opened and the main processing air path of the second dehumidification rotor device (8) is closed. After the airflow stabilizes, the regeneration air path of the second dehumidification rotor device (8) is closed and its drive mechanism is stopped. The first threshold is the low load threshold for exiting the dual-rotor mode, and the second threshold is the high load threshold for starting the second dehumidifying rotor device (8). The second threshold is greater than the first threshold. Mode switching delay and the shortest running time of each rotor are set to avoid frequent mode start-stop.

7. The waste heat recovery and dehumidification method according to claim 6, characterized in that, The system adjustment priority order is as follows: speed adjustment of the first dehumidifying impeller device (5) and the second dehumidifying impeller device (8); frequency adjustment of the high-temperature heat pump compressor; regeneration air volume adjustment; and steam coil heat replenishment adjustment.

8. The waste heat recovery and dehumidification method according to claim 6, characterized in that, The regeneration process is as follows: the regeneration exhaust air first passes through the high-temperature heat pump exhaust waste heat recovery evaporator (9) to heat the heat pump working fluid; the regeneration air is sent to the high-temperature heat pump condenser by the regeneration fan, and after being heated by the high-temperature heat pump condenser, it forms high-temperature regeneration air, which is sent to the regeneration zone of the corresponding dehumidification wheel to complete the wheel regeneration; when the temperature of the regeneration air at the outlet of the high-temperature heat pump condenser is lower than the target regeneration temperature, it is supplemented by heat through the steam coil.

9. The waste heat recovery and dehumidification method according to claim 6, characterized in that, S2 specifically includes: When the system wet load is lower than the first threshold, or when the outlet dew point of the first dehumidifying rotor device (5) meets the supply air dew point requirements, the low wet load mode is executed: the main processing air path leading to the second dehumidifying rotor device (8) is closed, the bypass branch is opened, and only the first dehumidifying rotor device (5) is put into processing air operation; the high temperature heat pump circuit recovers the sensible heat of the regenerated exhaust air through the high temperature heat pump exhaust waste heat recovery evaporator (9), and recovers the latent heat of condensation when the condensation conditions are met, so as to use the recovered heat as the regeneration heat source of the first dehumidifying rotor device (5), and the steam coil is closed or a small amount of supplementary heat is performed; When the system moisture load is between the first threshold and the second threshold, or when the outlet dew point of the first dehumidifying impeller (5) is continuously higher than the set supply air dew point for a preset time, the medium moisture load mode is executed: first, the regeneration air path corresponding to the second dehumidifying impeller (8) is opened and the high temperature heat pump circuit is started. After the regeneration temperature reaches the set range, the bypass ventilation valve is closed and the main processing air path of the second dehumidifying impeller (8) is opened, and the second dehumidifying impeller (8) is connected to the process air path. Under the medium moisture load condition, the first dehumidifying impeller (5) runs continuously and the second dehumidifying impeller (8) runs at low speed or intermittently. When the system supply air dew point still does not meet the set requirements under the medium moisture load mode, the high moisture load mode is executed, so that the first dehumidifying impeller (5) and the second dehumidifying impeller (8) are connected in series. The second surface cooler (6) pre-cools the air entering the second dehumidifying impeller (8) again. After that, the air is sent out after the supply air temperature is corrected by the third surface cooler (7). When the high-temperature heat pump capacity is insufficient, start the steam coil to supplement the regenerated air temperature to the target regeneration temperature.

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