Multi-stage waste heat recovery type rotary dehumidifier

Abstract

The utility model discloses a multi-stage waste heat recovery type rotary dehumidifier, and belongs to the technical field of rotary dehumidifiers. The utility model provides a multi-stage waste heat recovery type rotary dehumidifier. The multi-stage waste heat recovery type rotary dehumidifier comprises a heat recoverer, a condenser, a dehumidification rotary wheel, a compressor, a heat exchanger and a heat production device. The heat recoverer, the condenser and the regeneration area of the dehumidification rotating wheel are sequentially arranged along a fresh air path; an air outlet of the regeneration area of the dehumidification rotating wheel is communicated with the heat recoverer; the condenser, the heat exchanger and the compressor are connected through a first liquid path; and the heat production device is connected with the heat exchanger through a second liquid path. According to the multi-stage waste heat recovery type rotary dehumidifier, waste heat generated by a production system and waste heat generated by regeneration of the rotary wheel can be utilized at the same time to heat regeneration air to a high temperature, then regeneration of the rotary wheel is achieved, the provided regeneration air is high in temperature and clean, and it can be guaranteed that the dehumidification rotary wheel operates efficiently and is long in service life.

Description

Technical Field

[0001] This utility model belongs to the field of dehumidifier technology, specifically relating to a multi-stage waste heat recovery rotary dehumidifier. Background Technology

[0002] The desiccant rotor is the core component of a rotary desiccant dehumidifier, and its operating efficiency and lifespan determine the performance of the desiccant dehumidifier and the operating costs for the enterprise. Factors affecting the operating efficiency and lifespan of the desiccant rotor include the desiccant, the working environment, and regeneration parameters. Among the regeneration parameters, the regeneration temperature is crucial; too high a temperature accelerates the aging of the desiccant, while too low a temperature prevents sufficient regeneration, further affecting the rotor's operating efficiency and lifespan. Within a certain range, without compromising the performance of the desiccant, higher temperatures result in higher dehumidification efficiency. Currently, commonly used devices for providing regeneration air include electric heating devices, steam heating devices, gas heating devices, and waste heat recovery heating devices. Electric heating devices have a simple structure, are easy to maintain, and have strong applicability; however, their thermal efficiency is relatively low, generally around 70%, energy consumption is high, and temperature control is not precise enough. Steam heating devices offer good stability, stable steam output, and a wide range of applications; however, the equipment cost is high, installation and maintenance require professional personnel, and there are certain requirements for water quality. Gas-fired heating devices have a high calorific value, making them suitable for large-scale heating tasks, and the equipment cost is low; however, combustion produces pollutants, poses safety hazards, and gas transportation and storage require special handling. Waste heat recovery heating devices have significant energy-saving effects, utilizing existing waste heat resources to reduce energy consumption and lower operating costs, but their heating capacity is limited, making it difficult to reach the 80℃~90℃ and above temperatures required for medium-temperature regeneration. Utility Model Content

[0003] The technical problem to be solved by this utility model is: how to provide a rotary dehumidifier that can provide a higher rotary regeneration temperature through waste heat recovery.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a multi-stage waste heat recovery rotary dehumidifier, including a heat recovery unit, a condenser, a dehumidification rotor, a compressor, a heat exchanger, and a heat generation device;

[0005] The regeneration zones of the heat recovery unit, condenser, and dehumidifier are arranged sequentially along the regeneration air path; the exhaust port of the regeneration zone of the dehumidifier is connected to the heat recovery unit.

[0006] The condenser, heat exchanger, and compressor are connected via a first liquid circuit;

[0007] The heat-generating device and the heat exchanger are connected via a second liquid circuit.

[0008] Furthermore, the heat-generating device is used to generate hot wastewater with a temperature higher than that of room temperature water.

[0009] Furthermore, the heat-generating device is an air compressor.

[0010] Furthermore, it also includes a regeneration air filter and a regeneration air fan; the regeneration zones of the regeneration air filter, regeneration air fan, heat recovery unit, condenser and dehumidification rotor are arranged sequentially along the regeneration air path.

[0011] Furthermore, it also includes a heating cabinet, which includes a first chamber and a second chamber. The regenerated air filter, regenerated air fan, heat recovery unit and condenser are disposed in the first chamber, and the compressor and heat exchanger are disposed in the second chamber.

[0012] Furthermore, it also includes a fresh air valve, a fresh air filter, a pre-cooler, and a fresh air fan; the processing areas of the fresh air valve, fresh air filter, pre-cooler, and dehumidifier are arranged sequentially along the fresh air path.

[0013] Furthermore, it also includes a dehumidification cabinet; the fresh air valve, fresh air filter, front surface cooler and dehumidification wheel are installed in the dehumidification cabinet.

[0014] Furthermore, it also includes a heat storage device for storing hot wastewater generated by the heat-generating device at a temperature higher than that of room temperature water.

[0015] Furthermore, the heat exchanger is a plate heat exchanger.

[0016] Furthermore, the heat recovery device is an aluminum foil core heat recovery device.

[0017] Furthermore, the first liquid circuit circulates refrigerant. The second liquid circuit circulates wastewater generated by the heat-generating device.

[0018] The beneficial effects of this invention are as follows: The multi-stage waste heat recovery rotary dehumidifier provided by this invention can simultaneously utilize the waste heat generated by the production system and the waste heat generated by the rotary dehumidifier regeneration to heat the regeneration air to a higher temperature, thereby achieving rotary dehumidification. This reduces dependence on external energy sources such as electricity, steam, or gas, thus significantly reducing operating costs. Simultaneously, due to reduced energy consumption, the system's carbon emissions are also correspondingly reduced, contributing to the achievement of sustainable development goals. Furthermore, the multi-stage waste heat recovery rotary dehumidifier provided by this invention delivers high-temperature and clean regeneration air, reaching temperatures above 90℃, ensuring efficient and long-term operation of the dehumidification rotary dehumidifier. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of a multi-stage waste heat recovery rotary dehumidifier according to a specific embodiment of the present invention;

[0020] Label Explanation:

[0021] 1. Regeneration air filter; 2. Regeneration air fan; 3. Heat recovery unit; 4. Condenser; 5. Dehumidification rotor; 51. Regeneration zone; 52. Processing zone; 6. Compressor; 7. Heat exchanger; 8. Heat generation device; 9. Regeneration exhaust fan; 10. Heater. Detailed Implementation

[0022] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0023] Please refer to Figure 1 A multi-stage waste heat recovery rotary dehumidifier includes a heat recovery unit 3, a condenser 4, a dehumidification rotor 5, a compressor 6, a heat exchanger 7, and a heat generation device 8;

[0024] The regeneration zones 51 of the heat recovery unit 3, condenser 4 and dehumidifying impeller 5 are arranged sequentially along the regeneration air path; the exhaust port of the regeneration zone 51 of the dehumidifying impeller 5 is connected to the heat recovery unit 3.

[0025] Condenser 4, heat exchanger 7 and compressor 6 are connected via the first liquid passage;

[0026] The heat generating device 8 and the heat exchanger 7 are connected via a second liquid circuit.

[0027] As described above, the beneficial effects of this invention are as follows: The heat-generating device 8, such as the air compressor discharging cooling water at a relatively high temperature (approximately 42°C), enters the heat exchanger 7 through the second liquid path, exchanging heat with the refrigerant in the first liquid path. The refrigerant absorbs heat and enters the compressor 6, where it is compressed into a high-temperature, high-pressure gas, which then releases heat in the condenser 4. A fresh air stream first passes through the heat recovery unit 3, exchanging heat with the regeneration exhaust air (high-temperature, high-humidity air discharged from the regeneration zone 51, approximately 50°C) simultaneously entering the heat recovery unit 3. After heat exchange, the regeneration exhaust air, with its temperature reduced, is discharged outdoors (approximately 47°C). Meanwhile, the fresh air, with its increased temperature, passes through the condenser 4, further exchanging heat with it, resulting in a significant temperature increase (approximately 90~100°C), and then enters the regeneration zone 51 of the dehumidification rotor 5 to regenerate the dehumidification rotor 5. By recovering heat from wastewater and exhaust gas in multiple stages for regenerating the dehumidification rotor 5, energy consumption is greatly reduced, thus significantly lowering the overall operating cost.

[0028] In one or more embodiments, the heat-generating device 8 is used to generate hot wastewater at a temperature higher than that of room temperature water. The heat-generating device 8 can be any device already present on an existing production line that generates hot wastewater (cooling water), such as a refrigeration station, steam coil, air compressor, etc.

[0029] In one or more embodiments, the heat-generating device 8 is an air compressor.

[0030] In one or more embodiments, the second liquid path includes an outlet water path and a return water path. An electric water valve, a temperature sensor, and a flow meter are sequentially arranged along the water flow direction on the outlet water path. A temperature sensor and a check valve are sequentially arranged along the water flow direction on the return water path. The cooling water generated by the heat-generating device passes through the heat exchanger after passing through the outlet water path, is cooled, and then returns to the heat-generating device through the return water path for further cooling, thus achieving the reuse of cooling water and reducing the waste of heat and water resources. The electric water valve, temperature sensor, and flow meter are used to control the water flow and monitor the temperature and flow rate, which helps in calculating heat recovery and enabling numerical control.

[0031] As described above, when the heat demand on the condensing side changes, the heat pump system can adjust the opening of the electric water valve by monitoring the temperature and flow rate of the low-temperature hot water on the evaporating side, thereby adjusting the heat exchange on the evaporating side.

[0032] In one or more embodiments, a regeneration air filter 1 and a regeneration air fan 2 are also included; the regeneration zone 51 of the regeneration air filter 1, the regeneration air fan 2, the heat recovery unit 3, the condenser 4, and the dehumidification rotor 5 is arranged sequentially along the regeneration air path. The regeneration air, i.e., a stream of fresh air, passes through the above-mentioned devices in sequence to achieve heating and dehumidification, and is then used for the regeneration of the dehumidification rotor 5.

[0033] In one or more embodiments, a heat cabinet is also included. The heat cabinet comprises a first chamber and a second chamber. A regenerated air filter 1, a regenerated air fan 2, a heat recovery unit 3, and a condenser 4 are disposed in the first chamber, while a compressor 6 and a heat exchanger 7 are disposed in the second chamber. The first chamber is mainly used to allow fresh air to flow through and achieve temperature control, and is isolated from the second chamber. The heat-generating device 8 is disposed outside the heat cabinet. The heat cabinet, as an independent structure, is disposed outside the main body of the rotary dehumidifier. On the one hand, it does not affect the dehumidification process, and on the other hand, it facilitates daily maintenance. Furthermore, it can be used as a separate structure to retrofit existing rotary dehumidifiers, significantly reducing the cost of equipment replacement for enterprises. The heat-generating device itself belongs to the cooling system of the production workshop and does not need to be disposed in the heat cabinet.

[0034] In one or more embodiments, it further includes a fresh air valve, a fresh air filter, a pre-cooler, and a fresh air fan; the processing area 52 of the fresh air valve, fresh air filter, pre-cooler, and dehumidification impeller 5 is arranged sequentially along the fresh air path. Outdoor fresh air passes through the above-mentioned devices in sequence, and after temperature regulation and dehumidification, it is sent to a designated area, such as a workshop.

[0035] In one or more embodiments, a dehumidification cabinet is also included; a fresh air valve, a fresh air filter, a pre-cooling unit, and a dehumidification rotor 5 are disposed in the dehumidification cabinet. The dehumidification cabinet is the main body of the rotary dehumidifier and is independently disposed from the regeneration air heating device (heat cabinet).

[0036] In one or more embodiments, a heat storage device is also included, which is used to store the hot wastewater generated by the heat generating device 8 at a temperature higher than that of room temperature water. This is mainly used when the output of hot wastewater is large, to avoid the problem of excessive hot wastewater not being utilized in time and still needing to be discharged.

[0037] In one or more embodiments, a regeneration exhaust fan 9 is also included, which is disposed at the exhaust port of the regeneration zone 51 of the dehumidification rotor 5 and is used to exhaust the air after the regeneration dehumidification rotor 5.

[0038] In one or more embodiments, the heat exchanger 7 is a plate heat exchanger. Plate heat exchangers have high heat transfer performance; their compact plate design increases the heat transfer area, significantly improving heat exchange efficiency while saving space. They are also easy to disassemble and clean, facilitating maintenance and plate replacement, thus reducing operating and maintenance costs.

[0039] In one or more embodiments, the first liquid circuit circulates refrigerant. The second liquid circuit circulates wastewater generated by the heat-generating device 8.

[0040] In one or more embodiments, a heater 10 is also included, which can further heat the fresh air that has been preheated by the condenser, raising its temperature for regeneration of the dehumidifying rotor. The heater may not be activated when the fresh air temperature after passing through the condenser is sufficiently high.

[0041] In one or more embodiments, the heat recovery unit is an aluminum foil core heat recovery unit, which can effectively recover the heat from the exhaust gas after the rotor regeneration.

[0042] Please refer to Figure 1 Embodiment 1 of this utility model is as follows:

[0043] A multi-stage waste heat recovery rotary dehumidifier includes a heat cabinet, a dehumidification cabinet, a compressor, a heat exchanger, and an air compressor;

[0044] The heat exchanger contains, in sequence, a regeneration air filter, a regeneration air fan, an aluminum foil core heat recovery unit, and a condenser.

[0045] The compressor, heat exchanger, and air compressor are located outside the heat cabinet;

[0046] The dehumidifier cabinet contains, in sequence, a fresh air valve, a fresh air filter, a front cooling coil, a dehumidifier impeller, and a rear cooling coil;

[0047] The exhaust vent of the regeneration zone of the dehumidifying rotor is connected to the aluminum foil core heat recovery unit;

[0048] The condenser, heat exchanger, and compressor are connected via the first liquid passage;

[0049] The air compressor and heat exchanger are connected via a second fluid circuit;

[0050] The regeneration zone, consisting of a regeneration air filter, a regeneration air fan, an aluminum foil core heat recovery unit, a condenser, and a dehumidifying impeller, is arranged sequentially along the regeneration air path.

[0051] The fresh air valve, fresh air filter, front surface cooler, dehumidification impeller processing area and rear surface cooler are arranged sequentially along the fresh air duct;

[0052] The first liquid circuit contains refrigerant, while the second liquid circuit contains wastewater generated by the heat-generating device.

[0053] The working principle of this invention is as follows: Hot water at approximately 40-45°C discharged from the air compressor enters the plate heat exchanger, where it exchanges heat with the refrigerant in the first liquid path. The refrigerant absorbs heat and vaporizes into gas. The vaporized refrigerant gas then enters the compressor's suction end through the evaporator outlet. The compressor compresses the low-temperature, low-pressure refrigerant gas into a high-temperature, high-pressure gas. This compressed high-temperature, high-pressure refrigerant gas is discharged through the compressor's exhaust end and enters the condenser, where it exchanges heat with the surrounding air. The refrigerant gradually cools and liquefies in the condenser, releasing a large amount of heat. Simultaneously, high-humidity fresh air at approximately 25-35°C serves as regeneration air. Under the action of the regeneration air fan, it sequentially passes through the regeneration air filter, the aluminum foil core heat recovery unit, and the condenser, where it is heated and dehumidified to approximately 85-100°C, regenerating the dehumidification impeller. The regenerated exhaust air at approximately 45-55°C is then sent to the aluminum foil core heat recovery unit, where it exchanges heat with the fresh air before being discharged outdoors. The outlet temperature of the hot water after heat exchange is approximately 35-38°C.

[0054] The second embodiment of this utility model is as follows: Based on the first embodiment, it further includes a heat storage device, which is used to store cooling water generated by the air compressor at a temperature higher than that of room temperature water.

[0055] The third embodiment of this utility model is as follows: Based on the first embodiment, it further includes a heater, which is installed on the pipeline between the air outlet of the condenser and the air inlet of the regeneration zone of the dehumidifying wheel;

[0056] The second liquid circuit includes an outlet flow path and a return flow path; the outlet flow path is equipped with an electric water valve, a temperature sensor and a flow meter in sequence along the water flow direction; the return flow path is equipped with a temperature sensor and a check valve in sequence along the water flow direction.

[0057] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A multi-stage waste heat recovery type rotary dehumidifier characterized by comprising: This includes heat recovery units, condensers, dehumidifying rotors, compressors, heat exchangers, and heat-generating devices; The regeneration zones of the heat recovery unit, condenser, and dehumidifier are arranged sequentially along the regeneration air path; the exhaust port of the regeneration zone of the dehumidifier is connected to the heat recovery unit. The condenser, heat exchanger, and compressor are connected via a first liquid circuit; The heat-generating device and the heat exchanger are connected via a second liquid circuit.

2. The multi-stage waste heat recovery type rotary dehumidifier according to claim 1, characterized by The heat-generating device is used to produce hot wastewater with a temperature higher than that of room temperature water.

3. The multi-stage waste heat recovery type rotary dehumidifier according to claim 1, characterized by The heat-generating device is an air compressor.

4. The multi-stage waste heat recovery type rotary dehumidifier according to claim 1, characterized by It also includes a regeneration air filter and a regeneration air fan; the regeneration zones of the regeneration air filter, regeneration air fan, heat recovery unit, condenser and dehumidification impeller are arranged sequentially along the regeneration air path.

5. The multi-stage waste heat recovery type rotary dehumidifier according to claim 4, characterized by It also includes a heat exchanger, which includes a first chamber and a second chamber. The regenerated air filter, regenerated air fan, heat recovery unit and condenser are disposed in the first chamber, and the compressor and heat exchanger are disposed in the second chamber.

6. The multi-stage waste heat recovery type rotary dehumidifier according to claim 1, characterized by It also includes a fresh air valve, a fresh air filter, a pre-cooler, and a fresh air fan; the processing areas of the fresh air valve, fresh air filter, pre-cooler, and dehumidifier are arranged sequentially along the fresh air path.

7. The multi-stage waste heat recovery type rotary dehumidifier according to claim 6, characterized by It also includes a dehumidification cabinet; the fresh air valve, fresh air filter, front surface cooler and dehumidification wheel are installed in the dehumidification cabinet.

8. The multi-stage waste heat recovery type rotary dehumidifier according to claim 1, characterized by It also includes a heat storage device for storing hot wastewater generated by the heat-generating device at a temperature higher than that of room temperature water.

9. The multi-stage waste heat recovery rotary dehumidifier according to claim 1, characterized in that, The heat exchanger is a plate heat exchanger.

10. The multi-stage waste heat recovery type rotary dehumidifier according to claim 1, characterized by The heat recovery device is an aluminum foil core heat recovery device.

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