Exhaust system for tunnel drying oven

Abstract

The utility model discloses an exhaust system for a tunnel drying oven, which comprises a special water collection treatment device, an exhaust pipe, a water outlet pipe, a water outlet pipe, a water inlet pipe and a water outlet pipe, and is characterized in that the special water collection treatment device is used for collecting hot air of a heating section of the tunnel drying oven, cooling the hot air and separating out condensed water; the first gas flow control device is used for collecting the exhaust air of the cooling section of the tunnel drying oven and converging the exhaust air with the air discharged from the special water collection treatment device to form first mixed gas; the exhaust treatment device is used for discharging part of the first mixture out of a room; the venturi variable air volume device is used for collecting exhaust air of the preheating section of the tunnel drying oven and converging the exhaust air with the remaining part of the first mixture to form second mixed gas; and the clean air supplementing device is used for mixing the second mixed gas and outdoor fresh air and then enabling the mixed gas and the outdoor fresh air to enter the heating section of the tunnel drying oven.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel ovens, and more particularly to an exhaust system for tunnel ovens. Background Art

[0002] The tunnel oven is a special equipment that uses hot air circulation and far-infrared drying to dry various specifications of vials, ampoules, oral liquid bottles, etc. It is widely used in pharmaceutical factories to implement GMP transformation.

[0003] The airflow in the tunnel oven is divided into three stages: preheating, sterilization and cooling. During these three stages, the oven completes the drying of the medicine bottles. During the entire process, the tunnel oven will continue to generate exhaust air to remove moisture and heat.

[0004] The existing technology has the following disadvantages. 1. The temperature and humidity content of the gas generated during the exhaust process is relatively high. After being discharged from the equipment, this high-temperature and high-humidity gas is rapidly cooled by the external pipeline, which will produce a large amount of waste liquid, which cannot be treated. The long-term accumulated waste liquid will corrode and pollute the pipeline system, and long-term use will destroy the clean environment, which is not suitable for clean environment use; 2. The high-temperature gas discharged affects the environment. Utility Model Content

[0005] The utility model aims to provide an exhaust system for a tunnel oven, in order to solve the technical problems in the background technology.

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

[0007] An exhaust system for a tunnel oven, comprising:

[0008] A special water collection and treatment device, which is used to collect hot air from the heating section of the tunnel oven, cool the hot air, and precipitate condensed water;

[0009] A first gas flow control device, the first gas flow control device is used to collect the exhaust air of the cooling section of the tunnel oven and merge it with the air coming out of the dedicated water collection and treatment device to form a first mixed gas;

[0010] An exhaust treatment device, the exhaust treatment device is used to discharge a portion of the first mixture outdoors;

[0011] A venturi variable air volume device, the venturi variable air volume device is used to collect the exhaust air of the preheating section of the tunnel oven and merge it with the remaining part of the first mixture to form a second mixed gas;

[0012] A clean air supply device is used to mix the second mixed gas and outdoor fresh air and then enter the heating section of the tunnel oven.

[0013] In some embodiments, a second gas flow control device is provided on the pipeline between the dedicated water collection and treatment device and the heating section of the tunnel oven.

[0014] In some embodiments, the dedicated water collection and treatment device comprises:

[0015] A box body, wherein a penetrating installation cavity is provided in the box body;

[0016] An air inlet, the air inlet being arranged at one end of the installation cavity;

[0017] An air outlet, the air outlet being arranged at the other end of the installation cavity;

[0018] A gas processing device, which is arranged on a side of the installation cavity close to the gas outlet and is used to adsorb impurities in the gas;

[0019] A gas-liquid diverter device is obliquely arranged in the installation cavity and located below the gas processing device, and is used to separate the condensate refluxed onto the gas-liquid diverter device from the gas.

[0020] In some embodiments, the gas processing device includes an installation slideway disposed in an installation cavity and a filter layer slidably installed in the installation slideway.

[0021] In some embodiments, the filter layer is an activated carbon filter layer or a glass fiber filter layer.

[0022] In some embodiments, the gas-liquid diversion device includes a guide plate, which is inclined and has a plurality of through holes extending through the guide plate. The through holes are inclined, with the high end of the through holes located on the high end side of the guide plate and the low end of the through holes facing the low end side of the guide plate.

[0023] In some embodiments, a waste liquid collection chamber is formed between the guide plate, the side wall of the box body, and the air inlet. The waste liquid collection chamber is used to collect condensed liquid guided down from the guide plate, and a waste liquid discharge port is provided at the bottom of the waste liquid collection chamber.

[0024] In some embodiments, a first Venturi constant air volume device is provided on the pipeline for conveying the first mixed gas.

[0025] In some embodiments, a second Venturi constant air volume device is provided on the pipeline through which the clean air supply device supplies air to the tunnel oven.

[0026] In some embodiments, a controller is also included, and the controller is respectively connected to the exhaust treatment device, the first gas flow control device, the second gas flow control device, the clean air supply device, and the Venturi variable air volume device.

[0027] Compared with the prior art, the utility model has the following beneficial effects:

[0028] 1. In view of the defects of traditional technology, this application adds a special condensate collection device, which has cooling, collection and discharge functions, can quickly cool the hot air, analyze the hot air water to separate the condensate, and collect the condensate, and reasonably discharge it after collecting a certain amount of water. This device is a proprietary device for separating liquid and gas when the exhaust gas contains waste liquid.

[0029] 2. The newly added Venturi constant air volume device and Venturi variable air volume device have high air volume control accuracy, can effectively stabilize the exhaust, increase system stability, and improve the accuracy and stability of the entire system.

[0030] 3. A new gas flow control device (with memory function) is added to record the opening status of the entire exhaust process and find the optimal control data according to the stable operation status of the system. This device can effectively reduce the noise and energy consumption of the system.

[0031] 4. A new independent control system is added. This system cooperates with the Venturi device and the gas flow control device according to the changes in equipment exhaust and room pressure difference. After tens of thousands of system operation simulations, it monitors real-time data changes and reasonably adjusts the opening of the exhaust device and the frequency of the exhaust equipment to achieve the maximum exhaust effect with the minimum power, providing essential core technical support for the system's energy saving, noise and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the utility model.

[0033] Figure 2 It is a structural schematic diagram of a special water collection and treatment device.

[0034] Illustrations: 1-negative pressure double-sealed high-efficiency air supply outlet, 2-first combined return air outlet, 3-Venturi variable air volume device, 4-first Venturi constant air volume device, 5-special water collection and treatment device, 6-clean air supply device, 7-controller, 8-exhaust treatment device, 9-first gas flow control device, 10-second gas flow control device, 11-second combined return air outlet, 12-second Venturi constant air volume device, 13-air outlet, 14-gas treatment device, 15-gas-liquid diversion device, 16-air inlet, 17-waste liquid discharge port, 18-installation slide, 19-filter layer, 20-through hole, 21-waste liquid collection chamber. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0036] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0037] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are orientations or positional relationships based on the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0039] In addition, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or display that includes a series of steps or elements is not necessarily limited to those steps or elements explicitly listed but may include other steps or elements not explicitly listed or inherent to such process, method, product, or display.

[0040] The following will be combined Figure 1-2 , an exhaust system for a tunnel oven involved in the embodiment of the present application is described in detail. It is worth noting that the following embodiments are only used to explain the present application and do not constitute a limitation on the present application.

[0041] Embodiment 1:

[0042] See also Figure 1-2As shown, an exhaust system for a tunnel oven comprises: a special water collection and treatment device 5, a first gas flow control device 9, an exhaust treatment device 8, a Venturi variable air volume device 3, and a clean air supply device 6. The special water collection and treatment device 5 is used to collect the hot air from the heating section of the tunnel oven, cool the hot air, and precipitate condensed water; the first gas flow control device 9 is used to collect the exhaust air from the cooling section of the tunnel oven, and merge it with the air coming out of the special water collection and treatment device 5 to form a first mixed gas; the exhaust treatment device 8 is used to discharge a part of the first mixture to the outside; the Venturi variable air volume device 3 is used to collect the exhaust air from the preheating section of the tunnel oven, and merge it with the remaining part of the first mixture to form a second mixed gas; the clean air supply device 6 is used to mix the second mixed gas with outdoor fresh air and then enter the heating section of the tunnel oven.

[0043] A second gas flow control device 10 is provided on the pipeline between the dedicated water collection and treatment device 5 and the heating section of the tunnel oven. A first venturi constant air volume device 4 is provided on the pipeline for conveying the first mixed gas; a second venturi constant air volume device 12 is provided on the pipeline for the clean air supply device 6 to supply air to the tunnel oven. The clean air supply device 6 can be an air conditioning unit, and the exhaust air treatment device 8 can be a fan with a filter. Both are commonly used components in the existing clean fresh air industry.

[0044] The dedicated water collection and treatment device 5 includes: a box body, an air inlet 16, an air outlet 13, a gas processing device 14, and a gas-liquid diversion device 15. A penetrating installation cavity is provided in the box body; the air inlet 16 is arranged at one end of the installation cavity; the air outlet 13 is arranged at the other end of the installation cavity; the gas processing device 14 is arranged on the side of the installation cavity close to the air outlet 13, and is used to adsorb impurities in the gas; the gas-liquid diversion device 15 is obliquely arranged in the installation cavity and is located below the gas processing device 14, and is used to separate the condensate refluxed to the gas-liquid diversion device 15 from the gas.

[0045] When the tunnel oven is running, the hot air in the heating section enters the dedicated water collection and treatment device 5 through the second gas flow control device 10 (with memory function). The hot air enters the dedicated water collection and treatment device 5 through the air inlet 16. The temperature of the hot air will be reduced when passing through the gas-liquid diversion device 15. When the hot air continues to meet or pass through the gas treatment device 14 upward, the temperature of the hot air will drop rapidly, and condensed water will be precipitated at the same time. After a certain amount of condensed water is accumulated, it will drip into the gas-liquid diversion device 15 under the action of gravity, slide down along the gas-liquid diversion device 15 and then be collected.

[0046] The exhaust air of the cooling section passes through the first combined return air port 2, passes through the first gas flow control device 9 (with memory function), and merges with the air coming out of the outlet of the special water collection treatment device 5. The air flow rate is controlled by the first Venturi constant air volume device 4. A part of the air is discharged outdoors through the exhaust treatment device 8, and the other part enters the clean air supply device 6 with the air passing through the Venturi variable air volume device 3. The outdoor fresh air enters the clean air supply device 6 and merges with the return air, and then passes through the second Venturi constant air volume device 12 from the negative pressure double-sealed high-efficiency air supply port 1 to enter the heating section. The exhaust air of the preheating section passes through the second combined return air port 11, passes through the Venturi variable air volume device 3, and merges with a part of the exhaust air of the heating section and the cooling section. Enter the clean air supply device 6.

[0047] In order to better realize the system adjustment, the exhaust system also includes a controller 7, which is respectively connected to the exhaust treatment device 8, the first gas flow control device 9, the second gas flow control device 10, the clean air supply device 6, and the venturi variable air volume device 3. The controller 7 captures the temperature and humidity of the tunnel oven, and controls the air volume, temperature, humidity, and pressure difference through the venturi variable air volume device 3, the first gas flow control device 9 (with memory function), the second gas flow control device 10 (with memory function), the exhaust treatment device 8, and the clean air supply device 6.

[0048] The second gas flow control device 10 (with memory function) controls the amount to avoid the temperature in the heating section being too high or too low. The first venturi constant air volume device 4, the second venturi constant air volume device 12 and the venturi variable air volume device 3 adjust the pressure difference to maintain the positive pressure in the oven. The first venturi constant air volume device 4 and the venturi variable air volume device 3 can ensure the stability of the pressure difference in the room.

[0049] In some embodiments, the gas processing device 14 includes an installation slide 18 disposed in the installation cavity and a filter layer 19 slidably installed in the installation slide 18. This structure allows for regular replacement of the filter layer 19. The filter layer 19 is an activated carbon filter layer 19 or a glass fiber filter layer 19, which can remove harmful components in the gas.

[0050] In some embodiments, the gas-liquid flow separation device 15 includes a guide plate, which is arranged at an angle, and a plurality of through holes 20 are arranged on the guide plate, which are arranged at an angle, and the high end of the through hole 20 is located on the high end side of the guide plate, and the low end of the through hole 20 faces the low end side of the guide plate. In this structure, high-temperature gas with high water content can pass through, and condensed water will not flow away from the through hole 20 when falling, because the through hole 20 is also arranged at an angle, thereby achieving diversion and further achieving gas-liquid flow separation.

[0051] In some embodiments, a waste liquid collection chamber 21 is formed between the guide plate, the side wall of the box body, and the air inlet 16. The waste liquid collection chamber 21 is used to collect condensed liquid guided from the guide plate, and a waste liquid discharge port 17 is provided at the lower part of the waste liquid collection chamber 21. The collection and discharge of condensed water is realized to prevent it from corroding and polluting the pipeline system.

[0052] The above description is only a preferred embodiment of the present invention and is used to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An exhaust system for a tunnel oven, characterized in that: include: A special water collection and treatment device, which is used to collect hot air from the heating section of the tunnel oven, cool the hot air, and precipitate condensed water; A first gas flow control device, the first gas flow control device is used to collect the exhaust air of the cooling section of the tunnel oven and merge it with the air coming out of the dedicated water collection and treatment device to form a first mixed gas; An exhaust treatment device, the exhaust treatment device is used to discharge a portion of the first mixture outdoors; A venturi variable air volume device, the venturi variable air volume device is used to collect the exhaust air of the preheating section of the tunnel oven and merge it with the remaining part of the first mixture to form a second mixed gas; A clean air supply device is used to mix the second mixed gas and outdoor fresh air and then enter the heating section of the tunnel oven.

2. The exhaust system for a tunnel oven according to claim 1, characterized in that: A second gas flow control device is provided on the pipeline between the dedicated water collection and treatment device and the heating section of the tunnel oven.

3. The exhaust system for a tunnel oven according to claim 1, characterized in that: The dedicated water collection and treatment device comprises: A box body, wherein a penetrating installation cavity is provided in the box body; An air inlet, the air inlet being arranged at one end of the installation cavity; An air outlet, the air outlet being arranged at the other end of the installation cavity; A gas processing device, which is arranged on a side of the installation cavity close to the gas outlet and is used to adsorb impurities in the gas; A gas-liquid diverter device is obliquely arranged in the installation cavity and located below the gas processing device, and is used to separate the condensate refluxed onto the gas-liquid diverter device from the gas.

4. The exhaust system for a tunnel oven according to claim 3, characterized in that: The gas processing device comprises an installation slideway arranged in an installation cavity and a filter layer slidably installed in the installation slideway.

5. The exhaust system for a tunnel oven according to claim 4, characterized in that: The filter layer is an activated carbon filter layer or a glass fiber filter layer.

6. The exhaust system for a tunnel oven according to claim 4, characterized in that: The gas-liquid diversion device includes a guide plate, which is arranged at an angle. The guide plate is provided with a plurality of through holes that penetrate the guide plate. The through holes are arranged at an angle, and the high ends of the through holes are located on the high end side of the guide plate, and the low ends of the through holes face the low end side of the guide plate.

7. The exhaust system for a tunnel oven according to claim 6, characterized in that: A waste liquid collection chamber is formed between the guide plate, the side wall of the box body and the air inlet. The waste liquid collection chamber is used to collect condensed liquid guided down from the guide plate. A waste liquid discharge port is provided at the lower part of the waste liquid collection chamber.

8. The exhaust system for a tunnel oven according to claim 1, characterized in that: A first venturi constant air volume device is arranged on the pipeline for conveying the first mixed gas.

9. The exhaust system for a tunnel oven according to claim 1, characterized in that: A second Venturi constant air volume device is provided on the pipeline that supplies air from the clean air supply device to the tunnel oven.

10. The exhaust system for a tunnel oven according to claim 2, characterized in that: It also includes a controller, which is respectively connected to the exhaust treatment device, the first gas flow control device, the second gas flow control device, the clean air supply device, and the Venturi variable air volume device.

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