Vacuum belt dryer based on heat recovery

Abstract

The utility model belongs to the technical field of vacuum belt type dryers, particularly relates to a vacuum belt type dryer based on heat recovery, and aims to solve the problems of low recovery and utilization rate of condensed humid hot air and easiness in discharge of a large amount of humid air in the conventional vacuum belt type dryer, and adopts the following scheme that the vacuum belt type dryer comprises a vacuum belt type dryer body, a supporting seat is fixedly arranged at the bottom of the outer wall of the vacuum belt dryer body, a bin gate is arranged at a tank opening of the vacuum belt dryer body, two grips are symmetrically and fixedly arranged on the outer wall of the bin gate, and the double condensation recovery assembly is arranged outside the vacuum belt dryer body. The device is used for condensing and recycling wet hot air generated in the vacuum belt dryer body twice. During use, due to the design of the double condensation recovery assemblies, two times of condensation recovery of moist hot air is achieved, the heat recovery utilization rate is improved, meanwhile, due to the arrangement of the sealing rings, the good sealing performance of the bin door is guaranteed, and the drying efficiency is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum belt dryers, in particular to a vacuum belt dryer based on heat recovery. Background Art

[0002] The vacuum belt dryer is a commonly used material drying equipment, which combines the two working principles of vacuum and belt transmission. Under vacuum conditions, the material is evenly spread on the conveyor belt inside the dryer through a belt conveyor, and then the material is heated by a heating system to evaporate the moisture. At the same time, a vacuum pump is used to create a vacuum inside the drying chamber, which effectively reduces the evaporation temperature of the material surface and accelerates the drying speed of the material. At present, the recovery rate of the humid hot air after condensation of the vacuum belt dryer is low, and a large amount of humid air is easily discharged.

[0003] In view of the above problems, the present utility model document proposes a vacuum belt dryer based on heat recovery. Utility Model Content

[0004] The utility model provides a vacuum belt dryer based on heat recovery, which solves the shortcomings of the prior art that the recovery rate of moist hot air after condensation in the vacuum belt dryer is low and a large amount of moist air is easily discharged.

[0005] The utility model provides the following technical solutions:

[0006] Vacuum belt dryer based on heat recovery, including:

[0007] A vacuum belt dryer body, wherein a support seat is fixedly arranged at the bottom of the outer wall of the vacuum belt dryer body, a chamber door is arranged at the tank opening of the vacuum belt dryer body, and two handles are symmetrically fixedly arranged on the outer wall of the chamber door;

[0008] The double condensation recovery component is arranged outside the vacuum belt dryer body and is used for twice condensing and recovering the moist hot air generated in the vacuum belt dryer body, thereby improving the recovery rate of the moist hot air.

[0009] In one possible design, the double condensation recovery component includes a primary condenser fixedly mounted on the top of the outer wall of the vacuum belt dryer body, the input end of the primary condenser is connected to the inner wall of the vacuum belt dryer body through an exhaust pipe, the output end of the primary condenser is connected to a first conduit, the other end of the first conduit is connected to a drain tank, an L-shaped mounting frame is provided on one side of the drain tank, a vacuum pump is fixedly mounted on the L-shaped mounting frame, and the input end of the vacuum pump is connected to the exhaust port at the top of the drain tank through a second conduit.

[0010] In one possible design, a secondary condenser is fixedly mounted on one side of the L-shaped mounting frame, the input end of the secondary condenser is connected to the output end of the vacuum pump through a third conduit, the output end at the bottom of the secondary condenser is connected to a secondary recovery tank, and the top of the secondary condenser is connected to an exhaust pipe for discharging dry gas.

[0011] In a possible design, a solenoid valve is provided on the drain pipe at the bottom of the drain tank.

[0012] In a possible design, a filter screen for filtering impurities in the condensate is disposed in the drain tank.

[0013] In a possible design, an embedding groove is provided on one side of the compartment door, and a sealing ring for improving the sealing performance is clamped in the embedding groove.

[0014] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit the present invention.

[0015] In this application, the specific workflow is as follows:

[0016] Startup and settings: Turn on the main power supply and close the door. When the door is closed, the sealing ring fits tightly against the tank opening of the vacuum belt dryer to prevent gas leakage. Then start the vacuum belt dryer and set the temperature, vacuum degree, drying time and other parameters of the dryer through the control panel or related equipment. Make reasonable settings according to the characteristics of the material and process requirements.

[0017] Drying process: The material begins to dry under a vacuum environment. At the same time, the moist hot air generated in the vacuum belt dryer body is extracted by the exhaust pipe. The moist hot air first enters the primary condenser for condensation. The condensed liquid flows into the drain tank through the first conduit and is discharged through the drain pipe at the bottom. The uncondensed gas in the drain tank enters the vacuum pump through the second conduit to further extract the gas therein. The gas passing through the vacuum pump enters the secondary condenser for secondary condensation to ensure the maximum recovery of heat in the moist hot air. The dry gas after the secondary condensation is discharged through the exhaust pipe, and the secondary condensate is collected in the secondary recovery tank.

[0018] The utility model has the following beneficial effects:

[0019] High heat recovery efficiency: Through the design of double condensation recovery components, the moist hot air generated in the vacuum belt dryer can be condensed and recovered twice, greatly improving the heat recovery rate.

[0020] Good sealing: The sealing ring installed at the door can effectively improve the sealing of the door, prevent gas and heat leakage, and further improve the drying effect and energy utilization efficiency.

[0021] The utility model realizes double condensation recovery of moist hot air through the design of double condensation recovery components, thereby improving the heat recovery utilization rate. At the same time, the setting of the sealing ring ensures good sealing of the warehouse door, further improving the drying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the three-dimensional structure of a vacuum belt dryer based on heat recovery provided by an embodiment of the utility model;

[0023] Figure 2 A schematic diagram of the separation structure of the door and the sealing ring of a vacuum belt dryer based on heat recovery provided by an embodiment of the utility model;

[0024] Figure 3 This is an enlarged structural schematic diagram of point A of a vacuum belt dryer based on heat recovery provided by an embodiment of the utility model;

[0025] Figure 4 A schematic diagram of the structure of a double condensation recovery component of a vacuum belt dryer based on heat recovery provided in an embodiment of the utility model.

[0026] Figure numerals: 1. vacuum belt dryer body; 2. compartment door; 3. handle; 4. drain pipe; 5. solenoid valve; 6. sealing ring; 7. embedding groove; 8. primary condenser; 9. exhaust pipe; 10. drain tank; 11. first conduit; 12. L-shaped mounting frame; 13. vacuum pump; 14. second conduit; 15. secondary condenser; 16. third conduit; 17. exhaust pipe; 18. secondary recovery tank; 19. support base. DETAILED DESCRIPTION

[0027] 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 of 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.

[0028] In the description of the present invention, it should be understood that the terms "opening", "upper", "middle", "length", "inside" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to 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 invention.

[0029] In order to keep the following description of the embodiments of the present invention clear and concise, the present invention omits detailed descriptions of known functions and known components.

[0030] Embodiment 1

[0031] Please refer to Figure 1-4 The present application provides a vacuum belt dryer based on heat recovery, which aims to achieve efficient drying of materials while performing two condensation recovery of the generated moist hot air, thereby improving the heat recovery utilization rate, including:

[0032] The vacuum belt dryer body 1 is of model DW-1.2-8A. A support base 19 is fixedly arranged at the bottom of the outer wall of the body 1 to support the entire dryer. A door 2 is arranged at the tank opening of the body 1. Two handles 3 are symmetrically fixedly arranged on the outer wall of the door 2 to facilitate workers to move the door 2.

[0033] The present application provides a double condensation recovery component for twice condensing and recovering the moist hot air generated in the vacuum belt dryer body 1. The component includes a primary condenser 8 fixedly mounted on the top of the outer wall of the vacuum belt dryer body 1. The input end of the primary condenser 8 is connected to the inner wall of the vacuum belt dryer body 1 through an exhaust pipe 9 for extracting moist hot air. The output end of the primary condenser 8 is connected to a first conduit 11. The other end of the first conduit 11 is connected to a drain tank 10 for collecting condensed liquid. In addition, a solenoid valve 5 is provided on the drain pipe 4 at the bottom of the drain tank 10, which can conveniently control the on and off of the drain pipe 4, thereby controlling the discharge of the condensate in the drain tank 10. At the same time, a filter is provided in the drain tank 10 for filtering impurities in the condensate to ensure the purity of the condensate.

[0034] In order to further improve the condensation effect, the present application also sets an L-shaped mounting frame 12 on one side of the drain tank 10, and a vacuum pump 13 is fixedly installed on the L-shaped mounting frame 12. The input end of the vacuum pump 13 is connected to the exhaust port at the top of the drain tank 10 through the second conduit 14, which is used to extract the incompletely condensed gas in the drain tank 10. A secondary condenser 15 is also fixedly installed on one side of the L-shaped mounting frame 12. The input end of the secondary condenser 15 is connected to the output end of the vacuum pump 13 through the third conduit 16, and the incompletely condensed gas is secondary condensed. The output end at the bottom of the secondary condenser 15 is connected to a secondary recovery tank 18 for collecting the liquid after the secondary condensation. The top of the secondary condenser 15 is connected to an exhaust pipe 17 for discharging the dried gas. In this way, the gas treated by the vacuum pump 13 can enter the secondary condenser 15 for secondary condensation treatment, and the condensed liquid flows into the secondary recovery tank 18 for storage, while the dried gas is discharged through the exhaust pipe 17.

[0035] Embodiment 2

[0036] Improvements based on Example 1:

[0037] Please refer to Figure 2In order to improve the sealing performance of the door 2, an embedding groove 7 is provided on one side of the door 2, and a sealing ring 6 is clamped in the embedding groove 7. When the door 2 is closed, the sealing ring 6 fits tightly with the tank mouth of the vacuum belt dryer body 1 to prevent gas leakage.

[0038] However, as is well known to those skilled in the art, the working principles and wiring methods of the primary condenser 8, vacuum pump 13 and secondary condenser 15 are commonplace, and are conventional means or common knowledge, and will not be elaborated here. Those skilled in the art may make any optional selections according to their needs or convenience.

[0039] The above are only specific implementations of the utility model, but the protection scope of the utility model is not limited to them. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model; in the absence of conflicts, the embodiments of the utility model and the features in the embodiments can be combined with each other. Therefore, the protection scope of the utility model shall be based on the protection scope of the claims.

Claims

1. Vacuum belt dryer based on heat recovery, characterized in that: include: A vacuum belt dryer body (1), wherein a support seat (19) is fixedly arranged at the bottom of the outer wall of the vacuum belt dryer body (1), a chamber door (2) is arranged at the tank opening of the vacuum belt dryer body (1), and two handles (3) are symmetrically fixedly arranged on the outer wall of the chamber door (2); A double condensation recovery component is arranged outside the vacuum belt dryer body (1) and is used for twice condensing and recovering the moist hot air generated in the vacuum belt dryer body (1), thereby improving the recovery rate of the moist hot air. The double condensation recovery component comprises a primary condenser (8) fixedly mounted on the top of the outer wall of the vacuum belt dryer body (1), the input end of the primary condenser (8) is connected to the inner wall of the vacuum belt dryer body (1) through an exhaust pipe (9), the output end of the primary condenser (8) is connected to a first conduit (11), the other end of the first conduit (11) is connected to a drain tank (10), an L-shaped mounting frame (12) is arranged on one side of the drain tank (10), a vacuum pump (13) is fixedly mounted on the L-shaped mounting frame (12), and the input end of the vacuum pump (13) is connected to the exhaust port at the top of the drain tank (10) through a second conduit (14); A secondary condenser (15) is fixedly mounted on one side of the L-shaped mounting frame (12); an input end of the secondary condenser (15) is connected to an output end of a vacuum pump (13) via a third conduit (16); an output end at the bottom of the secondary condenser (15) is connected to a secondary recovery tank (18); and a top of the secondary condenser (15) is connected to an exhaust pipe (17) for discharging dry gas.

2. The vacuum belt dryer based on heat recovery according to claim 1, characterized in that: A solenoid valve (5) is provided on the liquid discharge pipe (4) at the bottom of the liquid discharge tank (10).

3. The vacuum belt dryer based on heat recovery according to claim 1, characterized in that: The drain tank (10) is provided with a filter screen for filtering impurities in the condensate.

4. The vacuum belt dryer based on heat recovery according to claim 1, characterized in that: An embedding groove (7) is provided on one side of the bin door (2), and a sealing ring (6) for improving sealing performance is clamped in the embedding groove (7).

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