Regenerated air preheating device

Abstract

The utility model discloses a regeneration air preheating device which comprises a shell, a water inlet, a water outlet, an air inlet and an air outlet are formed in the shell, the water inlet and the water outlet are used for being connected with a steam condensate heat energy recovery device, and a fan and at least two preheating heat exchangers are arranged in the shell. The at least two preheating heat exchangers are connected in series through a heat source connecting pipe, the heat source input end of the preheating heat exchanger adjacent to the air outlet is connected with the water inlet, and the heat source output end of the preheating heat exchanger adjacent to the air inlet is connected with the water outlet; the fan and the at least two preheating heat exchangers are sequentially arranged in the air inlet and outlet direction of the shell. According to the regeneration air preheating device, heat of steam condensate water of the rotary dehumidifier can be recycled to preheat regeneration air, the preheating heat exchangers are connected in series through the heat source connecting pipe, effective utilization of a heat source and gradual transfer of the heat are ensured, and the whole regeneration air preheating device has efficient heat exchange capacity; and continuous heat energy transfer can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary dehumidifier regeneration, in particular to a regeneration air preheating device. Background Art

[0002] During the regeneration process of the rotary dehumidifier, the regeneration air needs to be heated to significantly improve the dehumidification efficiency and effect of the rotary dehumidifier; by heating the regeneration air, the energy level in the air can be effectively increased, thereby accelerating the rate at which water molecules are released from the rotor material, allowing the rotor to complete the regeneration process more efficiently, thereby ensuring the continuous dehumidification capacity of the rotary dehumidifier; in addition, heating the regeneration air can further enhance the dehumidification capacity of the entire rotary dehumidifier, ensuring that the best dehumidification effect can be maintained under various environmental conditions.

[0003] According to conventional rotary dehumidifiers, when the steam inside is condensed and converted into high-temperature hot water above 90°C, the rotary dehumidifier no longer has the ability to regenerate. If the high-temperature hot water generated by the steam condensation process is directly discharged, it will not only mean that a large amount of heat energy is wasted, but will also cause irreversible negative impacts on the surrounding ecological environment, such as thermal pollution.

[0004] It can be seen that the existing technology still needs to be improved and enhanced. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a regenerative air preheating device with high efficiency in heat exchange capacity and energy utilization, which can realize continuous heat energy transfer.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A regenerative air preheating device comprises a shell, which is provided with a water inlet, a water outlet, an air inlet and an air outlet, the water inlet and the water outlet are used to connect to a steam condensate heat energy recovery device, a fan and at least two preheating heat exchangers are arranged in the shell, at least two of the preheating heat exchangers are connected in series through a heat source connecting pipe; the heat source input end of the preheating heat exchanger adjacent to the air outlet is connected to the water inlet, and the heat source output end of the preheating heat exchanger adjacent to the air inlet is connected to the water outlet; at least two of the preheating heat exchangers and the fan are arranged in sequence along the air inlet and outlet directions of the shell.

[0008] In the regenerative air preheating device, the fan is fixedly connected to the bottom of the shell through a fan base, and the axis of the fan is coaxial with the axis of the air inlet and the air outlet.

[0009] In the regenerative air preheating device, the fan base includes a fixed plate and two fixed blocks, the fan is fixedly mounted on the top of the fixed plate, and the two fixed blocks are respectively arranged at the two ends of the bottom of the fixed plate; the fixed block includes a U-shaped block and two connecting blocks, the horizontal part of the U-shaped block is fixedly connected to the bottom of the fixed plate, the vertical part of the U-shaped block is respectively connected to the two connecting blocks, the connecting block is fixedly connected to the bottom of the shell, and a shock-absorbing pad is provided at the connection between the connecting block and the shell.

[0010] The regenerative air preheating device further includes a control device. A temperature sensor is provided at the water outlet. The temperature sensor and the fan are electrically connected to the control device respectively.

[0011] In the regenerative air preheating device, an air balancing plate is provided on the air outlet side of the air inlet and the air inlet side of the air outlet, respectively. The two air balancing plates are respectively located on both sides of at least two of the preheating heat exchangers, and a plurality of air balancing holes are provided on the air balancing plates.

[0012] In the regeneration air preheating device, a filtering device is provided on the air outlet side of the air inlet.

[0013] In the regenerative air preheating device, a plurality of serpentine coils are provided in the preheating heat exchanger, and adjacent serpentine coils are connected in series; the input end of any of the serpentine coils is connected to the heat source input end of the preheating heat exchanger, and the output end of any of the serpentine coils is connected to the heat source output end of the preheating heat exchanger; the heat source flow direction in the serpentine coil is perpendicular to the inlet and outlet air direction.

[0014] In the regenerative air preheating device, the preheating heat exchanger includes a fixed frame, and multiple serpentine coils are evenly arranged in the fixed frame along the inlet and outlet air directions; a connecting plate is opened on the side of the fixed frame, and the connecting plate is used to fix the fixed frame in the shell; the top and bottom of the fixed frame are respectively provided with L-shaped reinforcement ribs.

[0015] Beneficial effects:

[0016] The utility model provides a regenerative air preheating device, which can recover the heat of steam condensate of steam energy-consuming equipment such as a rotary dehumidifier to preheat the regenerative air used by the rotary dehumidifier, and has the advantages of high energy utilization rate; and has efficient heat exchange capacity. By arranging a fan and at least two preheating heat exchangers, the regenerative air preheating device can realize continuous heat energy transfer; according to the ambient temperature conditions of the actual area of ​​use, several stages of preheating heat exchangers are connected in series through heat source connecting pipes, which ensures that the temperature of the steam condensate after heat recovery is close to the ambient temperature, that is, ensures the effective utilization of the steam waste heat and the complete recovery of heat, and the preheating heat exchanger and the fan are arranged in sequence along the air inlet and outlet directions of the regenerative air preheating device, which helps to form an orderly heat flow path and further improves the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the internal structure of the regenerative air preheating device provided by the utility model;

[0018] Explanation of the main component symbols: 1-shell, 11-air outlet, 12-air inlet, 2-fan, 21-fixing plate, 22-fixing block, 3-preheating heat exchanger, 31-connecting plate, 32-L-shaped reinforcement rib, 4-air balancing plate, 5-filter device. DETAILED DESCRIPTION

[0019] The present invention provides a regenerative air preheating device. To make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0020] In the description of the present invention, it should be understood that the terms "upper" and "lower" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and should not be understood as limitations on the present invention; in addition, the terms "installation" and "connection" and the like should be understood in a broad sense, and ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to specific circumstances.

[0021] See also Figure 1 The utility model provides a regenerative air preheating device, including a shell 1, which is provided with a water inlet, a water outlet, an air inlet 12 and an air outlet 11. The water inlet and the water outlet are used to connect to a steam condensate heat energy recovery device. A fan 2 and at least two preheating heat exchangers 3 are arranged in the shell 1. At least two of the preheating heat exchangers 3 are connected in series through a heat source connecting pipe; the heat source input end of the preheating heat exchanger 3 adjacent to the air outlet 11 is connected to the water inlet, and the heat source output end of the preheating heat exchanger 3 adjacent to the air inlet 12 is connected to the water outlet; at least two of the preheating heat exchangers 3 and the fan 2 are arranged in sequence along the air inlet and outlet directions of the shell 1.

[0022] The present application discloses a regenerative air preheating device, which can recover the heat of steam condensate of steam-using equipment such as a rotary dehumidifier to preheat the regenerative air used in the rotary dehumidifier, and has the advantages of high energy utilization rate; and has efficient heat exchange capacity. By setting a fan 2 and at least two preheating heat exchangers 3, the regenerative air preheating device can realize continuous heat energy transfer; according to the ambient temperature conditions of the actual area of ​​use, the number of preheating heat exchangers 3 is selected, and several stages of preheating heat exchangers 3 are connected in series through heat source connecting pipes to recover high-temperature steam condensate above 90°C to the ambient temperature level, thereby ensuring the effective utilization of steam waste heat and complete heat recovery, and the preheating heat exchanger 3 and the fan 2 are arranged in sequence along the inlet and outlet air directions of the regenerative air preheating device, which helps to form an orderly heat flow path and further improve the heat exchange efficiency.

[0023] The regeneration air preheating device disclosed in the present application, when actually working, its water inlet and water outlet are used to connect the plate 31 type heat exchanger, the first input end of the plate heat exchanger is used to connect the steam output end of the steam energy-consuming equipment, the first output end of the plate heat exchanger is connected to the normal temperature water recovery mechanism, the second input end and the second output end of the plate heat exchanger are respectively connected to the water outlet and the water inlet; the primary side of the plate heat exchanger fully exchanges heat with the steam condensate and the circulating water on the secondary side, and the hot water obtained on the secondary side is transported to the preheating device for preheating the regeneration air of the rotary dehumidifier, and the normal temperature water cooled by the regeneration air is continuously transported back to the plate The plate heat exchanger is used for circulating heat exchange, and the first output end of the plate heat exchanger can output the cooled steam condensate to the normal temperature water recovery mechanism, so as to transport the normal temperature water to normal temperature water-consuming equipment, such as cooling towers, etc., or discharge it directly; through the plate heat exchanger, high-temperature condensate above 90°C can be utilized to normal temperature level, thereby realizing complete recovery and utilization of thermal energy; and the water resource recovered by the normal temperature water recovery mechanism is normal temperature water after steam condensation, which can be directly recycled for water-demanding equipment such as cooling towers, realizing the recycling and utilization of water resources and saving the cooling energy consumption of the cooling tower; and the regeneration air preheated by the regeneration air preheating device can reach 80°C, meeting the high-temperature regeneration desorption requirements.

[0024] Furthermore, the fan 2 is fixedly connected to the bottom of the housing 1 via a fan base, and the axis of the fan 2 is coaxial with the axis of the air inlet 12 and the air outlet 11 .

[0025] In this embodiment, the design of the fan 2 being coaxial with the air inlet 12 and the air outlet 11 helps to reduce vibration and noise, improve the stability of the operation of the regenerative air preheating device, reduce wind resistance, improve heat exchange efficiency, and ensure that the performance of the regenerative air preheating device is fully utilized.

[0026] Furthermore, the fan base includes a fixing plate 21 and two fixing blocks 22, the fan 2 is fixed on the top of the fixing plate 21, and the two fixing blocks 22 are respectively arranged at the two ends of the bottom of the fixing plate 21; the fixing block 22 includes a U-shaped block and two connecting blocks, the horizontal part of the U-shaped block is fixedly connected to the bottom of the fixing plate 21, the vertical part of the U-shaped block is respectively connected to the two connecting blocks, the connecting block is fixedly connected to the bottom of the shell 1, and a shock-absorbing pad is provided at the connection between the connecting block and the shell 1.

[0027] In this embodiment, the fan 2 is bolted to the fixing plate 21, and the fixing plate 21 is bolted to the fixing block 22. Fixing blocks 22 are respectively provided at both ends of the bottom of the fixing plate 21, which not only enhances the overall stability of the fan base, but also provides additional support points for the fixing plate 21; the fixing block 22 includes a U-shaped block and two horizontal blocks, which can increase the contact area between the fixing block 22 and the fixing plate 21 and the shell 1, which not only enhances the bearing capacity of the fixing block 22, but also effectively reduces the stress concentration caused by insufficient contact; a shock-absorbing pad is provided at the connection between the connecting block and the shell 1, which can absorb vibrations generated during operation, reduce noise, reduce the possibility of damage to the regenerative air preheating device due to vibration, and extend the service life of the regenerative air preheating device.

[0028] Furthermore, the regenerative air preheating device further includes a control device, a temperature sensor is provided at the water outlet, and the temperature sensor and the fan 2 are electrically connected to the control device respectively.

[0029] In this embodiment, the control device is an existing technology, and the control device may include an STM32 series control chip; the control device can adjust the working state of the steam condensate heat energy recovery device connected to the regeneration air preheating device according to the real-time water outlet temperature feedback from the temperature sensor to ensure that the temperature of the steam condensate after heat exchange through the steam condensate heat energy recovery device can be reduced to normal temperature.

[0030] Furthermore, an air balancing plate 4 is provided on the air outlet side of the air inlet 12 and the air inlet side of the air outlet 11. The two air balancing plates 4 are respectively located on both sides of at least two of the preheating heat exchangers 3. The air balancing plates 4 are provided with multiple air balancing holes.

[0031] In this embodiment, an air balancing plate 4 is provided on both the air inlet and air outlet sides of the preheating heat exchanger 3. The multiple air balancing holes opened on the air balancing plate 4 help to achieve uniform distribution of airflow, thereby improving heat exchange efficiency and ensuring temperature uniformity.

[0032] Furthermore, a filter device 5 is provided on the air outlet side of the air inlet 12 .

[0033] In this embodiment, the filter device 5 is a primary filter; by setting up the filter device 5 to filter the regeneration air, dust and particulate matter in the regeneration air can be removed, preventing pollutants from clogging the micropores of the rotor, reducing the number of cleaning and maintenance of the rotor, and extending the service life of the rotor; and the clean regeneration air can ensure the heat exchange efficiency of the rotor, avoid the decrease in heat exchange efficiency due to dust accumulation, and thus improve the dehumidification efficiency.

[0034] Furthermore, a plurality of serpentine coils are provided in the preheating heat exchanger 3, and adjacent serpentine coils are connected in series; the input end of any of the serpentine coils is connected to the heat source input end of the preheating heat exchanger 3, and the output end of any of the serpentine coils is connected to the heat source output end of the preheating heat exchanger 3; the heat source flow direction in the serpentine coil is perpendicular to the inlet and outlet air direction.

[0035] In this embodiment, the preheating heat exchanger 3 has efficient heat exchange performance and uniform airflow distribution; by providing multiple serpentine coils and connecting adjacent serpentine coils in series, the heat exchange area can be increased and the efficiency of heat energy absorption and release can be improved; further, the flow direction of the heat source in the serpentine coil is designed to be perpendicular to the inlet and outlet wind directions, which increases the contact area between the heat source and the air, maximizes the heat exchange efficiency, and improves the heat energy transfer efficiency.

[0036] Furthermore, the preheating heat exchanger 3 includes a fixed frame, and the plurality of serpentine coils are evenly arranged in the fixed frame along the inlet and outlet directions; a connecting plate 31 is provided on the side of the fixed frame, and the connecting plate 31 is used to fix the fixed frame in the shell 1; the top and bottom of the fixed frame are respectively provided with L-shaped reinforcement ribs 32.

[0037] In this embodiment, a plurality of the serpentine coils are welded to the fixing frame, the fixing frame is bolted to the inner wall of the shell 1 via the connecting plate 31, and the L-shaped reinforcing ribs 32 are integrally formed with the fixing frame; by providing L-shaped reinforcing ribs 32 at the top and bottom of the fixing frame respectively, the overall strength of the fixing frame can be enhanced, which helps to improve the durability and pressure resistance of the preheating heat exchanger 3.

[0038] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and the utility model concept of the present invention, and all these changes or substitutions should fall within the scope of protection of the present invention.

Claims

1. A regenerative air preheating device, characterized in that: It includes a shell, which is provided with a water inlet, a water outlet, an air inlet and an air outlet. The water inlet and the water outlet are used to connect to the steam condensate heat energy recovery device. A fan and at least two preheating heat exchangers are arranged in the shell, and at least two of the preheating heat exchangers are connected in series through a heat source connecting pipe; the heat source input end of the preheating heat exchanger adjacent to the air outlet is connected to the water inlet, and the heat source output end of the preheating heat exchanger adjacent to the air inlet is connected to the water outlet; at least two of the preheating heat exchangers and the fan are arranged in sequence along the air inlet and outlet directions of the shell.

2. A regeneration air preheating device according to claim 1, characterized in that: The fan is fixedly connected to the bottom of the shell through a fan base, and the axis of the fan is coaxial with the axis of the air inlet and the air outlet.

3. The regeneration air preheating device according to claim 2, characterized in that: The fan base includes a fixed plate and two fixed blocks, the fan is fixedly mounted on the top of the fixed plate, and the two fixed blocks are respectively arranged at the two ends of the bottom of the fixed plate; the fixed block includes a U-shaped block and two connecting blocks, the horizontal part of the U-shaped block is fixedly connected to the bottom of the fixed plate, the vertical part of the U-shaped block is respectively connected to the two connecting blocks, the connecting block is fixedly connected to the bottom of the shell, and a shock-absorbing pad is provided at the connection between the connecting block and the shell.

4. The regeneration air preheating device according to claim 2, characterized in that: It also includes a control device, a temperature sensor is provided at the water outlet, and the temperature sensor and the fan are electrically connected to the control device respectively.

5. The regeneration air preheating device according to claim 4, characterized in that: An air balancing plate is provided on the air outlet side of the air inlet and the air inlet side of the air outlet, respectively. The two air balancing plates are respectively located on both sides of at least two of the preheating heat exchangers, and a plurality of air balancing holes are provided on the air balancing plates.

6. The regeneration air preheating device according to claim 1, characterized in that: A filtering device is provided on the air outlet side of the air inlet.

7. The regeneration air preheating device according to claim 1, characterized in that: The preheating heat exchanger is provided with a plurality of serpentine coils, and adjacent serpentine coils are connected in series; the input end of any of the serpentine coils is connected to the heat source input end of the preheating heat exchanger, and the output end of any of the serpentine coils is connected to the heat source output end of the preheating heat exchanger; the heat source flow direction in the serpentine coil is perpendicular to the inlet and outlet air direction.

8. The regeneration air preheating device according to claim 7, characterized in that: The preheating heat exchanger includes a fixed frame, and multiple serpentine coils are evenly arranged in the fixed frame along the inlet and outlet directions; a connecting plate is opened on the side of the fixed frame, and the connecting plate is used to fix the fixed frame in the shell; the top and bottom of the fixed frame are respectively provided with L-shaped reinforcement ribs.

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