Air preheater for leather production
By designing an air preheater with a curved flow path and multi-layer insulation structure in leather production, the problem of inaccurate air preheating in traditional equipment has been solved, achieving stable air temperature control and energy saving, and improving the quality and safety of leather production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WENZHOU HELI LEATHER IND CO LTD
- Filing Date
- 2025-07-14
- Publication Date
- 2026-07-10
AI Technical Summary
Traditional leather production air preheating equipment lacks temperature and pressure monitoring devices, resulting in inaccurate air preheating and problems such as over-drying or insufficient tanning of the leather.
An air preheater comprising a preheating box, air guide plate and heat exchange tube assembly was designed. It extends the contact time between air and heat by means of a curved flow path and adopts a multi-layer insulation structure to reduce heat loss. It is also equipped with a temperature probe and pressure gauge for real-time monitoring and control.
It improves the air preheating effect, ensures suitable air temperature, improves leather production quality and efficiency, reduces energy consumption, and ensures the safety and stability of the production process.
Smart Images
Figure CN224479654U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of air preheaters, and in particular to an air preheater for leather production. Background Technology
[0002] In the leather manufacturing industry, production processes have strict requirements for air temperature. Key processes such as tanning and drying of leather need to be carried out in a suitable temperature environment to ensure the quality and performance of the leather. Therefore, air preheating equipment has become an indispensable and important component of leather production lines.
[0003] Traditional air preheating equipment in leather production typically employs a simple, straight-cylinder heating structure. This type of equipment contains only simple heat exchange pipes. Air enters from one end of the equipment and flows rapidly through the pipes in a straight line, resulting in extremely short contact time with the heat medium inside. Due to this overly direct airflow path, the air cannot fully absorb the heat dissipated by the heat medium.
[0004] In terms of monitoring and control, traditional equipment lacks both temperature monitoring devices and pressure detection components. Operators cannot monitor the temperature and pressure parameters during the air preheating process in real time, making it difficult to precisely control the preheating process according to the specific needs of leather production. In actual production, situations often arise where the leather becomes overly dry and brittle due to excessively high air temperatures, or where the leather is not fully tanned due to excessively low temperatures. Utility Model Content
[0005] In order to achieve stable controlled air preheating processing, this application provides an air preheater for leather production.
[0006] The air preheater for leather production provided in this application adopts the following technical solution:
[0007] An air preheater for leather production includes a preheating box. An air supply assembly is installed on one side of the preheating box and is sealed and fixedly connected to the preheating box. A plurality of top air guide plates are evenly arranged on the inner side of the top of the preheating box, and a plurality of bottom air guide plates are evenly arranged on the inner side of the bottom of the preheating box. The top and bottom air guide plates are spaced apart, and one end of each top and bottom air guide plate is fixedly connected to the preheating box. The top and bottom air guide plates are used to allow the incoming air to flow in a curved manner within the preheating box. A heat exchange tube assembly is also installed in the preheating box and is fixedly connected to the preheating box, with both ends of the heat exchange tube assembly extending from one side of the preheating box.
[0008] By adopting the above technical solution, the air is preheated through the preheating chamber, while the heat exchange tube assembly is used to connect to the waste heat gas generated during the production process. The heat from the waste heat gas is used to preheat the air. The air supply assembly provides air to the preheating chamber, and the spaced distribution of the top and bottom air guide plates creates a curved flow path for the air entering the preheating chamber. This design significantly increases the airflow path within the preheating chamber and prolongs the contact time between the air and the heat exchange tube assembly. This allows the air to more fully absorb the heat dissipated by the heat exchange tube assembly, significantly improving the preheating effect and ensuring that the air entering the leather production process reaches a suitable temperature, thus improving the quality and efficiency of leather production.
[0009] Optionally, the preheating chamber includes a main chamber shell and a detection cover, wherein the detection cover is installed on the front end face of the main chamber shell and is sealed and fixedly connected to the main chamber shell.
[0010] By adopting the above technical solution, the preheating box is designed with two parts: a main shell and a test cover. The test cover is installed on the front end of the main shell and sealed in place. This structure facilitates the inspection and maintenance of the preheating box's interior. When it is necessary to check whether the internal components of the preheating box, such as the top air guide plate, bottom air guide plate, and heat exchange tube assembly, are working properly, only the test cover needs to be opened, without disassembling the entire preheating box, thus saving maintenance time and costs.
[0011] Optionally, the main housing includes an outer shell and an insulated inner liner. The insulated inner liner is installed in the outer shell and is fixedly connected to the outer shell. An insulation plate is also provided between the insulated inner liner and the outer shell.
[0012] By adopting the above technical solution, the main chamber shell uses a three-layer structure consisting of an outer shell, an insulated inner liner, and an insulation board. The insulated inner liner effectively reduces heat loss to the outside, while the insulation board further enhances the insulation effect and prevents heat transfer to the outer shell. This design greatly improves the insulation performance of the preheating chamber, reduces energy waste, lowers energy consumption costs in the leather production process, and also avoids safety hazards caused by excessively high outer shell temperatures.
[0013] Optionally, the air supply assembly includes an outer mesh box and a fan. The outer mesh box is fixedly installed on one side of the main housing, and the fan is fixedly installed in the outer mesh box. An air inlet connected to the fan is provided on the side of the main housing.
[0014] By adopting the above technical solution, the outer mesh box of the air supply component can perform preliminary filtration of the incoming air, preventing large particulate impurities from entering the preheating box and protecting the fan and internal components of the preheating box. The fan is fixedly installed in the outer mesh box, and sends air into the preheating box through the air inlet on the side of the main casing, providing power for airflow and ensuring that air can stably and continuously enter the preheating box for preheating treatment.
[0015] Optionally, the heat exchange tube assembly includes a bent section, an inlet pipe, and an outlet pipe. The bent section is fixedly installed in the heat-insulating inner liner, and the inlet pipe and outlet pipe are sealed to the two ends of the bent section.
[0016] By adopting the above technical solution, the heat exchange area is increased in the bend section of the heat exchange tube assembly, allowing for more thorough contact between the air and the heat exchange tube assembly. The inlet and outlet pipes are sealed at both ends of the bend section, ensuring stable flow of the heat medium within the heat exchange tube assembly, thereby achieving efficient heat exchange, transferring the heat of the heat medium to the air, and improving the air preheating efficiency.
[0017] Optionally, the lower end face of the heat-insulating inner liner is provided with an air outlet, and the lower end face of the main shell is provided with an exhaust pipe corresponding to the air outlet, the exhaust pipe being integrally formed with the main shell.
[0018] By adopting the above technical solution, the air outlet on the lower end face of the heat-insulating inner liner corresponds to and is integrally formed with the exhaust pipe on the lower end face of the main shell. This design allows the preheated air to be smoothly discharged from the preheating box, reduces the resistance to air flow, ensures the normal circulation of air in the preheating box, and improves the working efficiency of the entire air preheating system.
[0019] Optionally, the detection cover includes a sealing cover plate and a temperature probe. The temperature probe is located directly above the air outlet and is fixedly installed on the inner side of the sealing cover plate. A temperature display screen connected to the temperature probe is also fixedly installed on the outer side of the sealing cover plate.
[0020] By adopting the above technical solution, the temperature probe on the detection cover is positioned directly above the air outlet, enabling accurate measurement of the preheated air temperature. The temperature display screen is connected to the probe, showing the air temperature in real time. This allows operators to promptly understand the preheated air temperature and make adjustments according to the requirements of the leather production process, ensuring production stability and product quality. It also facilitates the controller's adjustment of fan speed and heat exchanger power based on probe feedback during operation.
[0021] Optionally, a pressure gauge is installed on the outer surface of the sealing cover, and the pressure gauge is fixedly connected to the sealing cover.
[0022] By adopting the above technical solution, the pressure gauge installed on the outer side of the sealing cover can monitor the pressure inside the preheating chamber in real time. When the pressure is abnormal, the operator can promptly detect it and take corresponding measures to ensure the safe operation of the preheater, avoid damage to the equipment due to excessively high or low pressure, and also improve the safety of leather production.
[0023] In summary, this application includes at least one of the following beneficial technical effects: The air preheater for leather production of this application significantly improves the preheating effect of air through a reasonable structural design. The top and bottom air guide plates cause the air to flow in a curved manner, increasing the contact time with the heat exchange tube assembly. The heat exchange tube assembly in the curved section increases the heat exchange area. Both work together to ensure that the air can fully absorb heat. At the same time, the preheating box adopts a multi-layer insulation structure, which effectively reduces heat loss and lowers energy consumption. In addition, the temperature probe and pressure gauge on the detection cover can monitor the air temperature and pressure in real time, providing precise parameter control for the leather production process, which is conducive to improving the quality and efficiency of leather production and ensuring the safe and stable operation of the production process. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the overall structure in an embodiment of this application.
[0025] Figure 2 yes Figure 1 The illustrated device is shown in three dimensions without the air supply component installed. Figure 1 .
[0026] Figure 3 yes Figure 2 Front view of the device shown.
[0027] Figure 4 yes Figure 2 Side view of the device shown.
[0028] Figure 5 yes Figure 1 The illustrated device is shown in three dimensions without the air supply component installed. Figure 2 .
[0029] Explanation of reference numerals in the attached drawings: 1. Preheating box; 101. Top air guide plate; 102. Bottom air guide plate; 11. Main box shell; 111. Outer shell; 112. Insulated inner liner; 113. Insulation board; 114. Air outlet; 115. Exhaust pipe; 12. Detection cover; 121. Sealing cover plate; 122. Temperature probe; 123. Temperature display screen; 124. Pressure gauge; 2. Air supply assembly; 21. External mesh box; 22. Fan; 3. Heat exchange tube assembly; 31. Bend section; 32. Air inlet pipe; 33. Air outlet pipe. Detailed Implementation
[0030] The present application will be further described in detail below with reference to the accompanying drawings.
[0031] This application discloses an air preheater for leather production. (See also...) Figure 1 , Figure 2 and Figure 3As shown, an air preheater for leather production includes a preheating box 1. An air supply assembly 2 is installed on one side of the preheating box 1 and is sealed and fixedly connected to the preheating box 1. A plurality of top air guide plates 101 are evenly arranged on the inner side of the top of the preheating box 1, and a plurality of bottom air guide plates 102 are evenly arranged on the inner side of the bottom of the preheating box 1. The top air guide plates 101 and bottom air guide plates 102 are spaced apart, and one end of each of the top air guide plates 101 and bottom air guide plates 102 is fixedly connected to the preheating box 1. The top air guide plates 101 and bottom air guide plates 102 are used to allow the incoming air to flow in a curved manner in the preheating box 1. A heat exchange tube assembly 3 is also installed in the preheating box 1 and is fixedly connected to the preheating box 1. Both ends of the heat exchange tube assembly 3 extend from one side of the preheating box 1. The preheating chamber 1 is used to preheat the air, while the heat exchanger tube assembly 3 is used to connect to the waste heat gas generated during the production process. The heat from the waste heat gas is used to preheat the air. The air supply assembly 2 provides air to the preheating chamber 1. The spaced distribution of the top air guide plate 101 and the bottom air guide plate 102 creates a curved flow path for the air entering the preheating chamber 1. This design significantly increases the airflow path within the preheating chamber 1 and prolongs the contact time between the air and the heat exchanger tube assembly 3. This allows the air to more fully absorb the heat emitted by the heat exchanger tube assembly 3, significantly improving the preheating effect and ensuring that the air entering the leather production process reaches a suitable temperature, thus improving the quality and efficiency of leather production.
[0032] Reference Figure 2 , Figure 3 and Figure 4As shown, the preheating chamber 1 includes a main shell 11 and a test cover 12. The test cover 12 is installed on the front end face of the main shell 11 and is sealed and fixedly connected to the main shell 11. The preheating chamber 1 is designed with two parts: the main shell 11 and the test cover 12. The test cover 12 is installed on the front end face of the main shell 11 and sealed and fixed. This structure facilitates the inspection and maintenance of the preheating chamber 1. When it is necessary to check whether the internal components of the preheating chamber 1, such as the top air guide plate 101, the bottom air guide plate 102, and the heat exchange tube assembly 3, are working properly, only the test cover 12 needs to be opened, without disassembling the entire preheating chamber 1, saving maintenance time and costs. The main shell 11 includes an outer shell 111 and an insulated inner liner 112. The insulated inner liner 112 is installed inside the outer shell 111 and is fixedly connected to the outer shell 111. A heat insulation plate 113 is also provided between the insulated inner liner 112 and the outer shell 111. The main housing 11 adopts a three-layer structure consisting of an outer shell 111, an insulated inner liner 112, and an insulation board 113. The insulated inner liner 112 effectively reduces heat loss to the outside, while the insulation board 113 further enhances the insulation effect and prevents heat transfer to the outer shell 111. This design greatly improves the insulation performance of the preheating box 1, reduces energy waste, lowers energy consumption costs in the leather production process, and also avoids safety hazards caused by excessively high temperatures in the outer shell 111. An air outlet 114 is provided on the lower end face of the insulated inner liner 112, and an exhaust pipe 115 corresponding to the air outlet 114 is provided on the lower end face of the main housing 11. The exhaust pipe 115 is integrally formed with the main housing 11. The air outlet 114 on the lower end face of the insulated inner liner 112 corresponds to the exhaust pipe 115 on the lower end face of the main shell 11 and is integrally formed. This design allows the preheated air to be smoothly discharged from the preheating box 1, reduces the resistance to air flow, ensures the normal circulation of air in the preheating box 1, and improves the working efficiency of the entire air preheating system.
[0033] Reference Figure 3 , Figure 4 and Figure 5As shown, the detection cover 12 includes a sealing cover plate 121 and a temperature probe 122. The temperature probe 122 is positioned directly above the air outlet 114 and is fixedly installed on the inner side of the sealing cover plate 121. A temperature display screen 123, connected to the temperature probe 122, is also fixedly installed on the outer side of the sealing cover plate 121. The temperature probe 122 on the detection cover 12, positioned directly above the air outlet 114, can accurately measure the temperature of the preheated air. The temperature display screen 123, connected to the temperature probe 122, displays the air temperature in real time, allowing operators to promptly understand the preheated air temperature and make adjustments according to the requirements of the leather production process, ensuring the stability of the production process and product quality. It also facilitates the controller in adjusting the fan 22 speed and heat exchanger power based on feedback from the temperature probe 122. A pressure gauge 124 is installed on the outer side of the sealing cover plate 121 and is fixedly connected to the sealing cover plate 121. The pressure gauge 124 installed on the outer side of the sealing cover 121 can monitor the pressure inside the preheating box 1 in real time. When the pressure is abnormal, the operator can detect it in time and take corresponding measures to ensure the safe operation of the preheater and avoid damage to the equipment due to excessively high or low pressure. It also helps to improve the safety of leather production.
[0034] Reference Figure 1 As shown, the air supply assembly 2 includes an outer mesh box 21 and a fan 22. The outer mesh box 21 is fixedly installed on one side of the main housing 11, and the fan 22 is fixedly installed inside the outer mesh box 21. An air inlet connected to the fan 22 is provided on the side of the main housing 11. The outer mesh box 21 of the air supply assembly 2 can perform preliminary filtration of the incoming air, preventing large particles from entering the preheating chamber 1, protecting the fan 22 and the internal components of the preheating chamber 1. It also ensures better heat dissipation for the fan 22, increasing its operational stability. The fan 22, fixedly installed inside the outer mesh box 21, delivers air into the preheating chamber 1 through the air inlet on the side of the main housing 11, providing power for airflow and ensuring a stable and continuous flow of air into the preheating chamber 1 for preheating.
[0035] Reference Figure 2 and Figure 3 As shown, the heat exchanger tube assembly 3 includes a bent section 31, an inlet pipe 32, and an outlet pipe 33. The bent section 31 is fixedly installed in the insulation inner liner 112, and the inlet pipe 32 and outlet pipe 33 are sealed to connect the two ends of the bent section 31. The bent section 31 of the heat exchanger tube assembly 3 increases the heat exchange area, allowing for more thorough contact between the air and the heat exchanger tube assembly 3. The sealed connection between the inlet pipe 32 and outlet pipe 33 ensures stable flow of the heat medium within the heat exchanger tube assembly 3, thereby achieving efficient heat exchange, transferring the heat of the heat medium to the air, and improving the preheating efficiency of the air.
[0036] The implementation principle of an air preheater for leather production according to an embodiment of this application is as follows: During actual use, the fan 22 is started, and outside air enters the fan 22 through the outer mesh box 21, then enters the preheating box 1 through the air inlet on the side of the main casing 11. Guided by the top air guide plate 101 and the bottom air guide plate 102, the air flows in a curved pattern within the preheating box 1, making full contact with the heat exchange tube assembly 3. The heat medium enters the bent section 31 through the air inlet pipe 32, transferring heat to the air and preheating it. The preheated air is discharged through the air outlet 114 on the lower end face of the insulated inner liner 112 and the exhaust pipe 115 on the lower end face of the main casing 11, entering the leather production process. Throughout the process, the temperature probe 122 measures the temperature of the preheated air in real time and displays it on the temperature display screen 123. The fan 22 speed is controlled based on the temperature measured by the temperature probe 122. The pressure gauge 124 monitors the pressure inside the preheating box 1 in real time to ensure the safe operation of the equipment.
[0037] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. An air preheater for leather production, comprising a preheating chamber (1), characterized in that: An air supply assembly (2) is installed on one side of the preheating box (1). The air supply assembly (2) is sealed and fixedly connected to the preheating box (1). Several top air guide plates (101) are evenly arranged on the inner side of the top of the preheating box (1), and several bottom air guide plates (102) are evenly arranged on the inner side of the bottom of the preheating box (1). The top air guide plates (101) and bottom air guide plates (102) are spaced apart, and one end of the top air guide plates (101) and bottom air guide plates (102) is fixedly connected to the preheating box (1). The top air guide plates (101) and bottom air guide plates (102) are used to make the incoming air flow in a curved manner in the preheating box (1). A heat exchange tube assembly (3) is also installed in the preheating box (1). The heat exchange tube assembly (3) is fixedly connected to the preheating box (1), and both ends of the heat exchange tube assembly (3) extend from one side of the preheating box (1).
2. The air preheater for leather production according to claim 1, characterized in that: The preheating box (1) includes a main box shell (11) and a detection cover (12). The detection cover (12) is installed on the front end face of the main box shell (11) and the detection cover (12) is sealed and fixedly connected to the main box shell (11).
3. An air preheater for leather production according to claim 2, characterized in that: The main housing (11) includes an outer shell (111) and an insulated inner liner (112). The insulated inner liner (112) is installed in the outer shell (111) and is fixedly connected to the outer shell (111). An insulation plate (113) is also provided between the insulated inner liner (112) and the outer shell (111).
4. An air preheater for leather production according to claim 3, characterized in that: The air supply assembly (2) includes an outer mesh box (21) and a fan (22). The outer mesh box (21) is fixedly installed on one side of the main shell (11), and the fan (22) is fixedly installed in the outer mesh box (21). An air inlet connected to the fan (22) is opened on the side of the main shell (11).
5. An air preheater for leather production according to claim 4, characterized in that: The heat exchange tube assembly (3) includes a bent tube section (31), an air inlet pipe (32) and an air outlet pipe (33). The bent tube section (31) is fixedly installed in the heat-insulating inner liner (112). The air inlet pipe (32) and the air outlet pipe (33) are sealed to the two ends of the bent tube section (31).
6. An air preheater for leather production according to claim 5, characterized in that: The lower end face of the heat-insulating inner liner (112) is provided with an air outlet (114), and the lower end face of the main shell (11) is provided with an exhaust pipe (115) corresponding to the air outlet (114). The exhaust pipe (115) is integrally formed with the main shell (11).
7. An air preheater for leather production according to claim 6, characterized in that: The detection cover (12) includes a sealing cover plate (121) and a temperature probe (122). The temperature probe (122) is located directly above the air outlet (114) and is fixedly installed on the inner side of the sealing cover plate (121). A temperature display screen (123) connected to the temperature probe (122) is also fixedly installed on the outer side of the sealing cover plate (121).
8. An air preheater for leather production according to claim 7, characterized in that: A pressure gauge (124) is installed on the outer side of the sealing cover (121), and the pressure gauge (124) is fixedly connected to the sealing cover (121).