Cast sheet drying equipment

Abstract

The utility model discloses cast sheet drying equipment, which relates to the technical field of cast sheet production and comprises a frame and a furnace body, the furnace body is fixedly arranged on the frame, a drying space is arranged in the furnace body and used for accommodating cast sheets, a fresh air system, a heat exchanger and an exhaust system are arranged on the furnace body, the fresh air system is communicated with the drying space, and the heat exchanger is communicated with the exhaust system. The fresh air system is used for distributing fresh air into the drying space, the exhaust system is communicated with the drying space and used for exhausting waste gas generated in the drying space to the outside, the exhaust system comprises a filter, the filter can filter harmful gas and particulate matter in the waste gas, and the heat exchanger is arranged between the fresh air system and the exhaust system. The heat exchanger can transfer heat of the waste gas to the fresh air so as to heat the fresh air; the cast sheet drying equipment disclosed by the utility model can reduce peculiar smell of the furnace body during operation, realize waste heat recycling and reduce environmental pollution.

Description

Technical Field

[0001] The utility model relates to the technical field of cast sheet production, in particular to a cast sheet drying device. Background Art

[0002] Cast film dryer is a kind of equipment used for film drying, which is mainly used in industries such as plastics, rubber and paper. The development of cast film dryer benefits from people's demand for film technology. Film is widely used in modern life, in food packaging, building materials, electronic products and other fields. In the process of film preparation, drying is one of the key steps. Therefore, in order to improve the quality and production efficiency of film, cast film dryer came into being. The existing cast film dryer has the problem of organic solvent vapor overflow during operation, which will cause odor and heat loss. Utility Model Content

[0003] The utility model aims to provide a cast sheet drying device to solve the problems existing in the above-mentioned prior art, reduce the odor of the furnace body during operation, realize the recovery and utilization of waste heat, and reduce environmental pollution.

[0004] To achieve the above purpose, the utility model provides the following solutions:

[0005] The utility model provides a cast sheet drying device, comprising a frame and a furnace body, wherein the furnace body is fixedly arranged on the frame, the interior of the furnace body is provided with a drying space, the drying space is used to accommodate the cast sheet, the furnace body is provided with a fresh air system, a heat exchanger and an exhaust system, the fresh air system is communicated with the drying space, the fresh air system is used to distribute fresh air into the drying space, the exhaust system is communicated with the drying space, the exhaust system is used to discharge the exhaust gas generated in the drying space to the outside, the exhaust system comprises a filter, the filter can filter harmful gases and particulate matter in the exhaust gas, the heat exchanger is arranged between the fresh air system and the exhaust system, the heat exchanger can transfer the heat of the exhaust gas to the fresh air to heat the fresh air.

[0006] Preferably, the drying space includes at least one drying sub-space, the furnace body includes an upper furnace body and a lower furnace body, the upper furnace body has at least one upper drying module, the lower furnace body has at least one lower drying module, the number of the lower drying modules, the upper drying modules and the heat exchanger are equal, each of the lower drying modules and each of the upper drying modules constitutes each drying unit, each of the drying units has the drying sub-space, the drying sub-space is used to accommodate the cast sheet, and each of the drying units is provided with the heat exchanger.

[0007] Preferably, the lower drying modules are sequentially and fixedly connected side by side, and the upper drying modules are sequentially and fixedly connected side by side.

[0008] Preferably, the lower furnace body is fixed on the frame, the upper furnace body is hinged on the frame, the upper furnace body can be buckled on the lower furnace body, the frame is provided with a lifting cylinder, the cylinder body of the lifting cylinder is fixed on the frame, the ejection end of the piston rod of the lifting cylinder is connected to the upper furnace body, and the piston rod extending upward can drive the upper furnace body to leave the lower furnace body.

[0009] Preferably, it further comprises forced heaters, the number of the forced heaters is equal to the number of the heat exchangers, and each of the drying units is provided with the forced heater.

[0010] Preferably, the lower drying module includes a first fresh air channel, an exhaust channel, a cross flow fan and an exhaust duct, and the upper drying module includes a second fresh air channel and a fresh air heating diffusion hood. The air inlet of the cross flow fan is connected to the outside, the air outlet of the cross flow fan is connected to the air inlet of the first fresh air channel, the air outlet of the first fresh air channel is connected to the air inlet of the second fresh air channel, the fresh air heating diffusion hood is arranged on the second fresh air channel, and the fresh air heating diffusion hood can heat and diffuse the fresh air into the drying sub-space; the air inlet of the exhaust channel is connected to the drying sub-space, and the air outlet of the exhaust channel is connected to the air inlet of the exhaust duct; the heat exchanger is arranged between the exhaust channel and the second fresh air channel, and the forced heater is arranged on the second fresh air channel.

[0011] Preferably, it also includes an air collecting square tube and an exhaust fan, the air collecting square tube is connected to the air outlet of each exhaust pipe, the air inlet of the filter is connected to the air collecting square tube, the air outlet of the filter is connected to the air inlet of the exhaust fan, and the air outlet of the exhaust fan is connected to the outside.

[0012] Preferably, the exhaust pipe is provided with an air valve; and the air collecting square pipe is provided with an explosion vent.

[0013] Preferably, it also includes a control display screen and several temperature sensors, the temperature sensor is arranged in the drying unit, the temperature sensor can detect the temperature in the drying sub-space, the control display screen is communicatively connected with the temperature sensor, the exhaust fan, the cross flow fan, the forced heater and the fresh air heating diffusion hood, and the control display screen can control the operation of the exhaust fan, the cross flow fan, the forced heater and the fresh air heating diffusion hood.

[0014] Preferably, an emergency stop button is provided on the control display screen.

[0015] Compared with the prior art, the utility model has achieved the following technical effects:

[0016] The cast sheet drying equipment provided by the utility model introduces fresh air into the drying space, which can replace the exhaust gas mixed with organic solvent vapor in the furnace, avoid condensation and deposition of the organic solvent on the furnace wall, and reduce the odor of the furnace during operation. The heat exchanger can transfer the heat of the exhaust gas to the fresh air to heat the fresh air, thereby realizing waste heat recovery and utilization, and reducing the energy consumption of the whole machine operation. The filter can filter harmful gases and particulate matter in the exhaust gas, and can separate the organic solvent in the exhaust gas and filter it out, so as to reduce the emission of harmful gases and particulate matter and reduce environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 The overall schematic diagram of the cast sheet drying equipment provided by the utility model;

[0019] Figure 2 for Figure 1 A schematic diagram of another direction;

[0020] Figure 3 for Figure 1 Schematic diagram of the middle and upper furnace body;

[0021] Figure 4 for Figure 1 Schematic diagram of the middle and lower furnace body;

[0022] Figure 5 for Figure 1 Schematic diagram of the middle frame;

[0023] In the figure: 1-upper furnace body, 2-lower furnace body, 3-frame, 11-upper furnace cover, 12-upper lift door, 13-fresh air heating diffusion cover, 14-diffusion cover fixing frame, 21-heat exchanger, 22-forced heater, 23-cross flow fan, 24-filter, 25-air collecting square pipe, 26-explosion vent, 27-air valve, 28-exhaust fan, 32-frame, 33-lower furnace fixing frame, 34-lifting cylinder, 35-control display screen. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] The utility model aims to provide a cast sheet drying device to solve the problems existing in the above-mentioned prior art, reduce the odor of the furnace body during operation, realize the recovery and utilization of waste heat, and reduce environmental pollution.

[0026] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0027] like Figure 1-5 As shown, the utility model provides a cast sheet drying device, including a frame 3 and a furnace body, the furnace body is fixedly arranged on the frame 3, the interior of the furnace body is provided with a drying space, the drying space is used to accommodate the cast sheet, the furnace body is provided with a fresh air system, a heat exchanger 21 and an exhaust system, the fresh air system is connected with the drying space, the fresh air system is used to distribute fresh air into the drying space, the exhaust system is connected with the drying space, the exhaust system is used to discharge the exhaust gas generated in the drying space to the outside, the exhaust system includes a filter 24, the filter 24 can filter harmful gases and particulate matter in the exhaust gas, the heat exchanger 21 is arranged between the fresh air system and the exhaust system, the heat exchanger 21 can transfer the heat of the exhaust gas to the fresh air to heat the fresh air.

[0028] The cast film drying equipment provided by the utility model introduces fresh air into the drying space, which can replace the exhaust gas mixed with organic solvent vapor in the furnace, avoid condensation and deposition of organic solvent on the furnace wall, and reduce the odor of the furnace during operation. The heat exchanger 21 can transfer the heat of the exhaust gas to the fresh air to heat the fresh air, realize waste heat recovery and utilization, and reduce the energy consumption of the whole machine. The filter 24 can filter harmful gases and particulate matter in the exhaust gas, and can separate the organic solvent in the exhaust gas and filter it out to reduce the emission of harmful gases and particulate matter and reduce environmental pollution.

[0029] In this embodiment, the filter 24 is preferably, but not limited to, a spiral filter, and a frame 32 is provided on the frame 3 .

[0030] Furthermore, the drying space includes at least one drying sub-space, and the furnace body includes an upper furnace body 1 and a lower furnace body 2. The upper furnace body 1 has at least one upper drying module, and the lower furnace body 2 has at least one lower drying module. The number of lower drying modules, upper drying modules and heat exchangers 21 is equal. Each lower drying module and each upper drying module constitute each drying unit, and each drying unit has a drying sub-space, which is used to accommodate the cast film. Each drying unit is provided with a heat exchanger 21, which is convenient for realizing multi-temperature zone independent control of each drying sub-space of each drying unit.

[0031] As a more preferred implementation of this embodiment, the lower drying modules are fixedly connected side by side in sequence, and the upper drying modules are fixedly connected side by side in sequence, so as to facilitate overall use.

[0032] As a more preferred implementation manner of the present embodiment, the lower furnace body 2 is fixed on the frame 3 by a lower furnace fixing frame 33, the upper furnace body 1 is hinged on the frame 3, the upper furnace body 1 can be buckled on the lower furnace body 2, and a lifting cylinder 34 is provided on the frame 3. The cylinder body of the lifting cylinder 34 is fixed on the frame 3, and the ejection end of the piston rod of the lifting cylinder 34 is connected to the upper furnace body 1. The piston rod extending upward can drive the upper furnace body 1 to leave the lower furnace body 2, so as to facilitate the maintenance of the furnace body; as a more preferred implementation manner of the present embodiment, the upper furnace body 1 is provided with an upper furnace cover 11 and an upper lift door 12. The upper furnace cover 11 is used to protect the upper drying module inside the upper furnace body 1, and the upper lift door 12 is arranged on the upper furnace cover 11 for easy maintenance and scalding prevention.

[0033] Furthermore, the cast film drying equipment provided by the utility model also includes forced heaters 22, the number of forced heaters 22 is equal to the number of heat exchangers 21, and each drying unit is provided with a forced heater 22 to facilitate forced heating of fresh air. The forced heater 22 is preferably but not limited to an electric heating dry-burning tube.

[0034] Furthermore, the lower drying module includes a first fresh air channel, an exhaust channel, a cross flow fan 23 and an exhaust duct, and the upper drying module includes a second fresh air channel and a fresh air heating diffusion cover 13. The air inlet of the cross flow fan 23 is connected to the outside, and the air outlet of the cross flow fan 23 is connected to the air inlet of the first fresh air channel, and the air outlet of the first fresh air channel is connected to the air inlet of the second fresh air channel. The fresh air heating diffusion cover 13 is fixed on the second fresh air channel by a diffusion cover fixing frame 14, and the fresh air heating diffusion cover 13 can heat and diffuse the fresh air into the drying sub-space; the air inlet of the exhaust channel is connected to the drying sub-space, and the air outlet of the exhaust channel is connected to the air inlet of the exhaust duct; the heat exchanger 21 is arranged between the exhaust channel and the second fresh air Between the channels, a forced heater 22 is arranged on the second fresh air channel, and the heat exchanger 21 is used to preheat the cold air. The fresh air heating diffusion hood 13 heats the air preheated by the heat exchanger 21 again. After the fresh air heating diffusion hood 13 is heated to the set temperature, the hot air is blown into the drying sub-space to heat and dry the cast sheet. The oily organic solvent vapor generated when drying the cast sheet is mixed with the air, and then discharged to the exhaust pipe through the exhaust channel and leaves the drying sub-space, so as to avoid the oily organic solvent vapor from being retained in the furnace cavity and overflowing from the furnace cavity into the production workshop, so as to keep the workshop clean and avoid the workers from being in an environment with rich organic solvent vapor, thereby avoiding the workers from affecting their health due to long-term inhalation of organic solvent vapor.

[0035] Furthermore, the cast film drying equipment provided by the utility model also includes an air collecting square tube 25 and an exhaust fan 28. The air collecting square tube 25 is connected to the air outlet of each exhaust pipe, the air inlet of the filter 24 is connected to the air collecting square tube 25, the air outlet of the filter 24 is connected to the air inlet of the exhaust fan 28, and the air outlet of the exhaust fan 28 is connected to the outside world, so as to improve the exhaust efficiency.

[0036] Furthermore, an air valve 27 is provided on the exhaust pipe; and an explosion vent 26 is provided on the air collecting square pipe 25, so as to facilitate the adjustment of the exhaust flow rate and achieve safety protection.

[0037] Furthermore, the cast film drying equipment provided by the utility model also includes a control display screen 35 and a plurality of temperature sensors. The temperature sensor is arranged in the drying unit, and the temperature sensor can detect the temperature in the drying sub-space. The control display screen 35 is communicated with the temperature sensor, the exhaust fan 28, the cross flow fan 23, the forced heater 22 and the fresh air heating diffusion cover 13. The control display screen 35 can control the operation of the exhaust fan 28, the cross flow fan 23, the forced heater 22 and the fresh air heating diffusion cover 13. The drying temperature of the furnace body is set on the control display screen 35 according to the material and process requirements of the cast film. The temperature control should be accurate and reliable to avoid the problem of overheating or insufficient temperature of the cast film. It is necessary to ensure that the heated fresh air can evenly cover the entire drying sub-space to provide uniform Heat transfer, the control display screen 35 adopts the structure of PLC combined with display screen, which makes the control more convenient and the information display is digital. It can realize real-time monitoring, data analysis and automatic adjustment by introducing advanced existing temperature sensors, monitoring systems and automatic control algorithms, realize automatic operation, and improve the intelligent level and production efficiency of production. By setting temperature sensors and feedback mechanisms, the drying temperature, film tension and other parameters can be monitored and adjusted in real time to ensure the best drying effect and production stability. PLC is combined with the display screen to control the temperature, mesh belt speed and air intake of the whole machine, so that the data is concise and clear, and the operation is simple and convenient. As a more preferred implementation method of this embodiment, a stepper motor is used to drive the mesh belt, so that the mesh belt has a wide speed regulation range.

[0038] Furthermore, an emergency stop button is provided at the control display screen 35 to ensure timely shutdown in abnormal circumstances to achieve safety protection. As a more preferred implementation of this embodiment, the cast film drying equipment is also provided with an overload protection device to achieve safety protection.

[0039] As a more preferred implementation method of this embodiment, a suitable air supply speed and direction are selected to ensure that the hot air can fully cover the surface of the cast sheet, which helps to accelerate the evaporation of water and the drying process of the cast sheet. The frequency converter can be used to control the speed of the air supply fan to adjust the air supply volume; according to the material and thickness of the cast sheet, an appropriate drying time is set. Too long or too short drying time may have a negative impact on the quality of the cast sheet. In actual use, the optimal drying time range can be determined through experiments and data analysis. Optimizing the drying process can reduce energy consumption. Energy-saving equipment, optimizing air supply control and adjusting temperature can also be used to reduce energy consumption during the drying process.

[0040] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A cast sheet drying device, characterized in that: It includes a frame and a furnace body, the furnace body is fixed on the frame, the interior of the furnace body is provided with a drying space, the drying space is used to accommodate the cast film, the furnace body is provided with a fresh air system, a heat exchanger and an exhaust system, the fresh air system is connected with the drying space, the fresh air system is used to distribute fresh air to the drying space, the exhaust system is connected with the drying space, the exhaust system is used to discharge the exhaust gas generated in the drying space to the outside, the exhaust system includes a filter, the filter can filter harmful gases and particulate matter in the exhaust gas, the heat exchanger is placed between the fresh air system and the exhaust system, the heat exchanger can transfer the heat of the exhaust gas to the fresh air to heat the fresh air.

2. The cast sheet drying device according to claim 1, characterized in that: The drying space includes at least one drying sub-space, the furnace body includes an upper furnace body and a lower furnace body, the upper furnace body has at least one upper drying module, the lower furnace body has at least one lower drying module, the number of the lower drying modules, the upper drying modules and the heat exchanger are equal, each of the lower drying modules and the upper drying modules constitute each drying unit, each of the drying units has the drying sub-space, the drying sub-space is used to accommodate the cast sheet, and each of the drying units is provided with the heat exchanger.

3. The cast sheet drying device according to claim 2, characterized in that: The lower drying modules are sequentially and fixedly connected side by side, and the upper drying modules are sequentially and fixedly connected side by side.

4. The cast sheet drying device according to claim 3, characterized in that: The lower furnace body is fixed on the frame, the upper furnace body is hinged on the frame, the upper furnace body can be buckled on the lower furnace body, the frame is provided with a lifting cylinder, the cylinder body of the lifting cylinder is fixed on the frame, the ejection end of the piston rod of the lifting cylinder is connected to the upper furnace body, and the piston rod extending upward can drive the upper furnace body to leave the lower furnace body.

5. The cast sheet drying device according to claim 2, characterized in that: It also includes forced heaters, the number of which is equal to the number of the heat exchangers, and each drying unit is provided with the forced heater.

6. The cast sheet drying device according to claim 5, characterized in that: The lower drying module includes a first fresh air channel, an exhaust channel, a cross flow fan and an exhaust duct, and the upper drying module includes a second fresh air channel and a fresh air heating diffusion hood. The air inlet of the cross flow fan is connected to the outside, the air outlet of the cross flow fan is connected to the air inlet of the first fresh air channel, the air outlet of the first fresh air channel is connected to the air inlet of the second fresh air channel, the fresh air heating diffusion hood is arranged on the second fresh air channel, and the fresh air heating diffusion hood can heat and diffuse the fresh air into the drying sub-space; the air inlet of the exhaust channel is connected to the drying sub-space, and the air outlet of the exhaust channel is connected to the air inlet of the exhaust duct; the heat exchanger is arranged between the exhaust channel and the second fresh air channel, and the forced heater is arranged on the second fresh air channel.

7. The cast sheet drying device according to claim 6, characterized in that: It also includes an air collecting square tube and an exhaust fan. The air collecting square tube is connected to the air outlet of each exhaust pipe, the air inlet of the filter is connected to the air collecting square tube, the air outlet of the filter is connected to the air inlet of the exhaust fan, and the air outlet of the exhaust fan is connected to the outside.

8. The cast sheet drying device according to claim 7, characterized in that: The exhaust pipe is provided with an air valve; the air collecting square pipe is provided with an explosion vent.

9. The cast sheet drying device according to claim 7, characterized in that: It also includes a control display screen and several temperature sensors. The temperature sensor is arranged in the drying unit. The temperature sensor can detect the temperature in the drying sub-space. The control display screen is communicatively connected with the temperature sensor, the exhaust fan, the cross flow fan, the forced heater and the fresh air heating diffusion hood. The control display screen can control the operation of the exhaust fan, the cross flow fan, the forced heater and the fresh air heating diffusion hood.

10. The cast sheet drying device according to claim 9, characterized in that: An emergency stop button is arranged at the control display screen.

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