Penetrating type dryer heat energy recovery device and energy-saving heat supply system
By employing a dual sensible heat exchanger and an automatic cleaning device in the through-type dryer, the problems of heat energy waste and impurity contamination are solved, achieving efficient heat energy recovery and low-cost maintenance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGZHOU DYSON DIGITAL ENERGY TECH CO LTD
- Filing Date
- 2025-04-08
- Publication Date
- 2026-04-21
AI Technical Summary
Existing through-type dryers suffer from heat energy waste and fabric contamination due to impurities during the heat recovery process. Traditional heat exchangers are inefficient and have high maintenance costs.
It adopts a dual-sensory heat exchanger structure, combined with a variable frequency fan and automatic spraying and purging devices, and designs the flow paths of fresh air and exhaust gas. Impurities are separated by a reversing hood, achieving efficient heat exchange and reducing blockage.
It improves heat recovery efficiency, reduces maintenance costs, avoids fabric contamination, and ensures stable system operation.
Smart Images
Figure CN224151515U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of drainage and water seal technology, specifically to a heat recovery device for a through-type dryer and an energy-saving heating system. Background Technology
[0002] As a core piece of equipment in laundry plants, the through-flow dryer works by rapidly drying fabrics through hot air circulation. During operation, the dryer needs to be heated to the target temperature (140℃-200℃) through heat exchange with high-temperature steam or by gas heating. Then, high-temperature hot air is introduced into the dryer to remove moisture from the fabric surface. The exhaust gas is then directly discharged into the atmosphere. In this process, apart from natural heat dissipation from the equipment and heat absorbed by the fabric itself, all other heat is discharged through the exhaust gas. At this point, the exhaust gas still contains a relatively high temperature, typically 80℃-120℃, resulting in a significant loss of heat energy through direct emission.
[0003] In existing technologies, heat recovery is performed using the following methods:
[0004] (1) Direct mixing recycling: Some of the high-temperature waste gas is directly mixed with the heated fresh air for reuse, and then passed into the dryer for use. In this technology, since the high-temperature waste gas contains impurities such as lint and dust, direct reuse can easily cause the fabric to be contaminated by impurities. At the same time, this technology only recovers part of the heat energy. If a filter is installed on the waste gas reuse pipeline, it needs to be disassembled and cleaned frequently.
[0005] (2) Traditional heat exchanger recovery: Traditional heat exchangers such as plate heat exchangers are used for heat recovery. Since traditional heat exchangers are multi-stage coil designs with complex structures, the heat exchange efficiency of traditional heat exchangers is low (usually less than 50%) for gas-to-gas heat exchange. At the same time, due to the problem of impurities in the exhaust gas, dust accumulation and blockage are easy to occur, requiring frequent manual disassembly and cleaning, resulting in high maintenance costs. Utility Model Content
[0006] In order to overcome the shortcomings of the existing technology, one of the objectives of this utility model is to provide a heat recovery device for a through-type dryer to solve the above-mentioned traditional problems.
[0007] The second objective of this utility model is to provide an energy-saving heating system that uses the heat recovery device of the through-type dryer.
[0008] One of the objectives of this utility model is achieved through the following technical solution:
[0009] A through-type dryer heat recovery device includes a shell, a first heat exchange module, a second heat exchange module, a fresh air collection hood, an exhaust gas inlet hood, an exhaust gas outlet hood, a reversing hood, and a fan mounted on the shell. The fresh air collection hood is located at the rear end of the shell, the exhaust gas inlet hood and the exhaust gas outlet hood are both located at the upper end of the shell, and the reversing hood is located at the lower end of the shell. The exhaust gas inlet hood, the hot end of the first heat exchange module, the reversing hood, the hot end of the second heat exchange module, and the exhaust gas outlet hood are sequentially connected to form an exhaust gas heat exchange channel. The cold end of the second heat exchange module, the cold end of the first heat exchange module, the fresh air collection hood, and the fan are sequentially connected to form a fresh air channel.
[0010] Preferably, both the first heat exchange module and the second heat exchange module are sensible heat exchangers.
[0011] Preferably, the fan is a variable frequency fan.
[0012] Preferably, the fresh air collection hood is equipped with a first temperature and humidity sensor, the exhaust gas inlet hood is equipped with a second temperature and humidity sensor, the exhaust gas outlet hood is equipped with a third temperature and humidity sensor, and the variable frequency fan is electrically connected to the first temperature and humidity sensor, the second temperature and humidity sensor, and the third temperature and humidity sensor.
[0013] Preferably, the fresh air collection hood, the exhaust gas inlet hood, the exhaust gas outlet hood, and the reversing hood are all trapezoidal in shape in the side or longitudinal section.
[0014] Preferably, the fresh air collection hood is arranged to gradually decrease in size from the direction of gas flow, the exhaust gas inlet hood is arranged to gradually increase in size from the direction of gas flow, the exhaust gas outlet hood is arranged to gradually decrease in size from the direction of gas flow, and the reversing hood is arranged to gradually increase in size from bottom to top.
[0015] Preferably, the exhaust gas inlet hood is provided with a first transparent inspection port, the exhaust gas outlet hood is provided with a second transparent inspection port, and the reversing hood is provided with a third transparent inspection port.
[0016] Preferably, the heat recovery device of the through-type dryer further includes a first spray assembly and a second spray assembly. The first spray assembly includes a first main water pipe, a first control valve disposed on the first main water pipe, a first branch water pipe connected to the first main water pipe, and a first water distributor connected to the first branch water pipe. The first water distributor is disposed between the first heat exchange module and the exhaust gas inlet hood. The second spray assembly includes a second main water pipe, a second control valve disposed on the second main water pipe, a second branch water pipe connected to the second main water pipe, and a second water distributor connected to the second branch water pipe. The second water distributor is disposed between the second heat exchange module and the exhaust gas outlet hood.
[0017] Preferably, the heat recovery device of the through-type dryer further includes a filter screen and a compressed air purging assembly. The filter screen is installed at the front end of the housing. The compressed air purging assembly includes a compressed air main pipe, a third control valve installed on the compressed air main pipe, a distribution pipe connected to the compressed air main pipe, and a jet nozzle installed on the distribution pipe. The distribution pipe is located on opposite sides and / or opposite ends of the filter screen.
[0018] The second objective of this utility model is achieved by the following technical solution:
[0019] An energy-saving heating system includes the heat recovery device for the through-type dryer described above.
[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0021] The heat recovery device of this utility model washes the first heat exchange module with high-temperature exhaust gas from top to bottom. Through the action of the reversing hood, some impurities (such as lint and dust) in the exhaust gas are left in the reversing hood. The exhaust gas then washes the second heat exchange module from bottom to top. In this way, the accumulation of dust and blockage of impurities on the hot end side of the heat exchange module is reduced. At the same time, it is also easy to maintain and can greatly reduce maintenance costs. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the heat recovery device for a through-type dryer according to the present invention.
[0023] Figure 2 for Figure 1 The side view of the heat recovery device for the through-type dryer shown;
[0024] Figure 3 for Figure 1 The diagram shows a top view of the heat recovery device for a through-type dryer.
[0025] In the figure: 10, outer shell; 20, first heat exchange module; 30, second heat exchange module; 40, fresh air collection hood; 50, exhaust gas inlet hood; 60, exhaust gas outlet hood; 70, reversing hood; 80, fan; 90, first spray assembly; 91, second spray assembly. Detailed Implementation
[0026] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.
[0027] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0028] In the description of this utility model, it should be understood that when an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be intermediate elements present. Conversely, when an element is referred to as being "directly" connected to another element, there are no intermediate elements.
[0029] Please see Figures 1-3 The present invention relates to a preferred embodiment of a through-type dryer heat recovery device, which is used to connect the high-temperature exhaust gas outlet of the dryer and to the fresh air heating system. The device exchanges the waste heat of the high-temperature exhaust gas with the fresh air, and then the preheated fresh air is used directly or introduced into the fresh air heating equipment to be heated to the required temperature for reuse, so as to achieve the effect of energy saving and environmental protection. Specifically, the heat recovery device includes a housing 10, a first heat exchange module 20, a second heat exchange module 30, a fresh air collection hood 40, an exhaust gas inlet hood 50, an exhaust gas outlet hood 60, a reversing hood 70, and a fan 80, all mounted on the housing 10. The fresh air collection hood 40 is located at the rear end of the housing 10, the exhaust gas inlet hood 50 and the exhaust gas outlet hood 60 are both located at the upper end of the housing 10, and the reversing hood 70 is located at the lower end of the housing 10. The exhaust gas inlet hood 50, the hot end of the first heat exchange module 20, the reversing hood 70, the hot end of the second heat exchange module 30, and the exhaust gas outlet hood 60 are sequentially connected to form an exhaust gas heat exchange channel. The cold end of the second heat exchange module 30, the cold end of the first heat exchange module 20, the fresh air collection hood 40, and the fan 80 are sequentially connected to form a fresh air channel.
[0030] The aforementioned heat recovery device flushes the first heat exchange module 20 from top to bottom with high-temperature exhaust gas. Through the action of the reversing hood 70, some impurities (such as lint and dust) in the exhaust gas are left inside the reversing hood 70. The exhaust gas then flushes the second heat exchange module 30 from bottom to top. In this way, the accumulation of dust and blockage of impurities on the hot end side of the heat exchange module is reduced. At the same time, it is also easy to maintain and can greatly reduce maintenance costs.
[0031] In this embodiment, both the first heat exchange module 20 and the second heat exchange module 30 are sensible heat exchangers. Their working principle is as follows: the core of the sensible heat exchanger uses hydrophilic aluminum foil as a carrier and consists of several layers of heat exchange units. The flow channels of adjacent unit layers are arranged in a cross-shaped pattern. Heat exchange occurs between the two streams of gas introduced into the heat exchanger. Due to the temperature difference on both sides of the airflow partition, heat transfer occurs when the two streams of gas pass through the partition, thus achieving a better sensible heat exchange process, avoiding direct contact between exhaust gas and fresh air, and eliminating the risk of secondary pollution of fabrics. In other embodiments, depending on the heat exchange efficiency requirements, the heat exchange module can also adopt a coil heat exchange structure.
[0032] In one embodiment, the fan 80 is an exhaust fan 80 or a blower 80. The fan 80 draws fresh air into the heat exchange module, where it is exchanged for heat before being distributed to other units for utilization. The fan 80 can be a variable frequency fan 80, linked to the drying status of the dryer to adapt to temperature and airflow fluctuations under different load conditions in the laundry, ensuring stable system operation. The fan 80 is equipped with a variable frequency motor and inverter, linked to the operating status of the through-type dryer. The gateway reads the dryer's operating status; when the dryer is in drying mode, the fan 80 starts; when the dryer enters the cooling, unloading, or loading stages, the fan 80 stops. In other embodiments, the fresh air collection hood 40 is equipped with a first temperature and humidity sensor, the exhaust gas inlet hood 50 is equipped with a second temperature and humidity sensor, and the exhaust gas outlet hood 60 is equipped with a third temperature and humidity sensor. The variable frequency fan 80 is electrically connected to the first, second, and third temperature and humidity sensors. The fan 80 is linked to the temperature and humidity; when temperature < X and humidity > Y, the fan 80 frequency is A (the value of A can be set); when temperature > X and humidity < Y, the fan 80 frequency decreases to B (the value of B can be set). Multiple temperature and humidity stages can be set for refined control.
[0033] Viewed from the side or longitudinal section, the fresh air collection hood 40, the exhaust gas inlet hood 50, the exhaust gas outlet hood 60, and the reversing hood 70 are all roughly trapezoidal in shape, which facilitates the arrangement of gas and subsequent gas delivery. Specifically, the fresh air collection hood 40 is gradually reduced in size from the direction of gas flow, the exhaust gas inlet hood 50 is gradually increased in size from the direction of gas flow, the exhaust gas outlet hood 60 is gradually reduced in size from the direction of gas flow, and the reversing hood 70 is gradually increased in size from bottom to top.
[0034] In this embodiment, the exhaust gas inlet hood 50 is provided with a first transparent inspection port, the exhaust gas outlet hood 60 is provided with a second transparent inspection port, and the reversing hood 70 is provided with a third transparent inspection port. The inspection ports can be used to check the condition inside the hood, such as whether there are too many impurities or blockages. The corresponding inspection ports can also be opened to inspect and maintain the hood.
[0035] In other embodiments, the heat recovery device further includes a first spray assembly 90 and a second spray assembly 91. The first spray assembly 90 includes a first main water pipe, a first control valve disposed on the first main water pipe, a first branch water pipe connected to the first main water pipe, and a first water distributor connected to the first branch water pipe. The first water distributor is disposed between the first heat exchange module 20 and the exhaust gas inlet hood 50. The second spray assembly 91 includes a second main water pipe, a second control valve disposed on the second main water pipe, a second branch water pipe connected to the second main water pipe, and a second water distributor connected to the second branch water pipe. The second water distributor is disposed between the second heat exchange module 30 and the exhaust gas outlet hood 60. By setting the cleaning time (daily or more than 2 days) and the opening duration, the first control valve / second control valve is opened to clean the first heat exchange module 20 and the second heat exchange module 30 respectively, so as to avoid the accumulation of lint in the exhaust gas in the heat exchanger, avoid the decrease in efficiency of the heat exchanger after use, and solve the problem of difficult cleaning. During the opening duration, the first control valve / second control valve is closed. In this embodiment, the bottom of the reversing hood 70 is provided with a drain outlet and an automatic drain valve installed on the drain outlet. The automatic drain valve is electrically connected to the first control valve and the second control valve. When the first control valve / second control valve is activated, the automatic drain valve is opened to discharge sewage into the sewage treatment main pipe. Both the first control valve and the second control valve are electric valves.
[0036] In this embodiment, the heat recovery device also includes a filter and a compressed air purging assembly (not shown). The filter is installed at the front end of the housing 10. The compressed air purging assembly includes a compressed air main pipe, a third control valve installed on the compressed air main pipe, a distribution pipe connected to the compressed air main pipe, and a jet nozzle installed on the distribution pipe. The distribution pipe is located on opposite sides and / or opposite ends of the filter. By opening the third control valve, the filter is purged (controlled by the control system, opened at set intervals, and the opening time can be set) to avoid lint from clogging the filter, which would increase the air intake resistance and also solve the problem of frequent filter cleaning.
[0037] The heat recovery device for the through-type dryer in the above embodiments has the following advantages:
[0038] (1) High efficiency: The waste heat utilization rate of exhaust gas is >70%, which significantly reduces the energy consumption of fresh air heating;
[0039] (2) Safety: Avoid direct contact between exhaust gas and fresh air to eliminate the risk of secondary pollution of fabrics;
[0040] (3) Compactness and economy: Simplify the heat exchange structure and reduce equipment manufacturing costs and maintenance difficulty;
[0041] (4) Dynamic adjustment capability: Add a variable frequency fan 80, which is linked with the drying state of the dryer to adapt to the temperature and air volume fluctuations under different load conditions in the laundry factory, and ensure the stable operation of the system.
[0042] (5) Convenience: Equipped with automatic spraying and automatic purging devices. The automatic spraying device can prevent lint in the exhaust gas from accumulating in the heat exchanger, thus avoiding a decrease in the efficiency of the heat exchanger after use, and also solving the problem of difficult cleaning. The automatic purging device can prevent lint from clogging the air inlet filter, which would increase the air inlet resistance, and also solves the problem of frequent cleaning of the heat exchanger air inlet filter.
[0043] In other embodiments, an energy-saving heating system is also provided, which includes the above-mentioned through-type dryer heat recovery device. By connecting the dryer, the waste gas recovery pipeline, the fresh air heating system and other equipment respectively, the heat recovery of high-temperature waste gas is realized, thereby achieving the effect of energy saving and environmental protection.
[0044] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0045] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A through-type dryer heat energy recovery device, characterized by, The device includes a housing, a first heat exchange module and a second heat exchange module mounted on the housing, a fresh air collection hood, an exhaust gas inlet hood, an exhaust gas outlet hood, a reversing hood, and a fan. The fresh air collection hood is located at the rear end of the housing, the exhaust gas inlet hood and the exhaust gas outlet hood are both located at the upper end of the housing, and the reversing hood is located at the lower end of the housing. The exhaust gas inlet hood, the hot end of the first heat exchange module, the reversing hood, the hot end of the second heat exchange module, and the exhaust gas outlet hood are sequentially connected to form an exhaust gas heat exchange channel. The cold end of the second heat exchange module, the cold end of the first heat exchange module, the fresh air collection hood, and the fan are sequentially connected to form a fresh air channel.
2. The heat recovery device according to claim 1, wherein Both the first heat exchange module and the second heat exchange module are sensible heat exchangers.
3. The heat recovery device for a through-type dryer according to claim 1, wherein The fan is a variable frequency fan.
4. The heat recovery device according to claim 3, wherein The fresh air collection hood is equipped with a first temperature and humidity sensor, the exhaust gas inlet hood is equipped with a second temperature and humidity sensor, and the exhaust gas outlet hood is equipped with a third temperature and humidity sensor. The variable frequency fan is electrically connected to the first, second, and third temperature and humidity sensors.
5. The heat recovery device according to claim 1, wherein On the side or longitudinal section, the fresh air collection hood, the exhaust gas inlet hood, the exhaust gas outlet hood, and the reversing hood all have a trapezoidal structure.
6. The heat recovery device according to claim 5, wherein The fresh air collection hood is set to gradually decrease in size from the direction of gas flow, the exhaust gas inlet hood is set to gradually increase in size from the direction of gas flow, the exhaust gas outlet hood is set to gradually decrease in size from the direction of gas flow, and the reversing hood is set to gradually increase in size from bottom to top.
7. The heat recovery device according to claim 1, wherein The exhaust gas inlet hood is provided with a first transparent inspection port, the exhaust gas outlet hood is provided with a second transparent inspection port, and the reversing hood is provided with a third transparent inspection port.
8. The heat recovery device according to claim 1, wherein The heat recovery device of the through-type dryer further includes a first spray assembly and a second spray assembly. The first spray assembly includes a first main water pipe, a first control valve installed on the first main water pipe, a first branch water pipe connected to the first main water pipe, and a first water distributor connected to the first branch water pipe. The first water distributor is installed between the first heat exchange module and the exhaust gas inlet hood. The second spray assembly includes a second main water pipe, a second control valve installed on the second main water pipe, a second branch water pipe connected to the second main water pipe, and a second water distributor connected to the second branch water pipe. The second water distributor is installed between the second heat exchange module and the exhaust gas outlet hood.
9. The heat recovery device according to claim 1, wherein The heat recovery device of the through-type dryer also includes a filter screen and a compressed air purging assembly. The filter screen is installed at the front end of the housing. The compressed air purging assembly includes a compressed air main pipe, a third control valve installed on the compressed air main pipe, a distribution pipe connected to the compressed air main pipe, and a jet nozzle installed on the distribution pipe. The distribution pipe is located on opposite sides and / or opposite ends of the filter screen.
10. An energy efficient heating system, characterized by, Includes the heat recovery device for a through-type dryer as described in any one of claims 1-9.