Rake type vacuum drying machine with filter residue waste heat recovery function

Abstract

The rake type vacuum drying machine comprises a support, two bearing seats are fixedly installed on the support, a middle shaft is rotatably installed inside the position between the two bearing seats, a tank body is fixedly installed between the two bearing seats, and a medium cavity is formed in the inner wall of the tank body. The low-temperature thermal medium is injected into the medium cavity by starting the injection device, residual temperature of the tank body and materials in the tank body is absorbed, and then the thermal medium absorbing heat is discharged and collected through the discharge valve to serve as a heating medium for re-operation, so that heating energy is saved, and energy is saved. And meanwhile, the pressurizing mechanism is started to inject high-pressure air into the ventilation channel, the high-pressure air is blown to the inner wall of the tank body through the one-way valve, residual materials are blown off, cleaning is convenient, and therefore the device has the advantages that waste heat of the residues is recycled, and meanwhile the residues are blown off and cleaned conveniently.

Description

Technical Field

[0001] The utility model relates to the field of rake type vacuum dryers, in particular to a rake type vacuum dryer with filter residue waste heat recovery function. Background Art

[0002] Rake vacuum dryer is widely used in chemical, food, pharmaceutical and other industrial fields. It has a simple structure, convenient operation and stable performance. It is particularly suitable for drying paste materials that are easy to decompose, flammable and easy to oxidize at high temperature. The working principle of rake vacuum dryer is that when the material is added to the cylinder of rake vacuum dryer, it will be indirectly heated by the steam, hot water or heat-conducting oil flowing in the interlayer of the cylinder. Under the stirring of the rotating rake teeth, the surface of the material in contact with the cylinder wall is constantly updated, so that the material is heated evenly. After the material is heated, the moisture in the material will be vaporized, and the vaporized moisture will be promptly pumped away by the vacuum pump, so that the material is dried. Rake vacuum dryer needs to open a door that can be freely closed and opened at one end of the cylinder, and clean the inner cavity of the cylinder of rake vacuum dryer through the open door to prevent the fixed materials or impurities on the inner cavity of the cylinder of rake vacuum dryer from affecting the drying of the material and polluting the material.

[0003] However, after the rake vacuum dryer cylinder dries the material, residual material solids will adhere to the inner wall, and the cylinder needs to be opened to clean it, which is inefficient. At the same time, since the residual solids have a large amount of residual heat, direct cleaning will cause energy waste. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of the utility model is to provide a rake-type vacuum dryer with filter residue waste heat recovery to solve the background technical problems.

[0005] To achieve the above purpose, the utility model adopts the following technical solution.

[0006] A rake vacuum dryer with waste heat recovery for filter residue comprises a bracket, two bearing seats are fixedly mounted on the bracket, a central shaft is internally rotatably mounted between the two bearing seats, a tank body is fixedly mounted between the two bearing seats, a medium cavity is arranged on the inner wall of the tank body, a heat medium inlet valve and an outlet valve communicating with the medium cavity are mounted on the left and right sides of the top of the tank body, a heat recovery medium inlet valve and an outlet valve communicating with the medium cavity are mounted on the left and right sides of the bottom of the tank body, a driving part is mounted on the top of the right side of the bracket, an output end of the driving part is fixedly connected with the central shaft, an injection device is mounted at the bottom of the inlet valve, a recovery box is mounted on the outlet valve, evenly distributed rake rods are mounted on the outer side of the central shaft, an air passage is opened inside the central shaft, two rows of one-way valves communicating with the air passage are fixedly mounted on the central shaft, a booster mechanism communicating with the air passage is mounted on the left end of the central shaft, a feed valve is mounted on the top of the tank body, and a negative pressure pump is fixedly connected to the right side of the feed valve through a pipeline.

[0007] As a further description of the above technical solution: the boosting mechanism includes a boosting air pump and a rotating joint, the boosting air pump is fixedly installed on the bracket, the output end of the boosting air pump is fixedly connected to the rotating joint, and the other end of the rotating joint is connected and cooperated with the central axis.

[0008] As a further description of the above technical solution: the end of the one-way valve away from the air passage is inclined toward the rotation direction.

[0009] As a further description of the above technical solution: the driving part includes a driving motor, a transmission rod and a transmission, the driving motor is fixedly mounted on the bracket, the output end of the driving motor is fixedly connected to the input port of the transmission through a coupling, the bottom of the transmission is fixedly mounted on the bracket, and the right end of the middle shaft is fixedly connected to the output port of the transmission through a coupling.

[0010] As a further description of the above technical solution: the injection device includes a water tank and a water pump, the side of the water tank is fixedly connected to the bracket, the water pump is fixedly installed to the top of the water tank, the input end of the water pump is connected and fixed to the water tank through a pipe, and the output end of the water pump is fixedly connected to the inlet valve.

[0011] As a further description of the above technical solution: a discharge valve is fixedly connected to the bottom of the tank body.

[0012] Compared with the prior art, the advantages of the present invention are:

[0013] This solution uses an injection device in conjunction with a pressurizing mechanism, thereby realizing the recovery of waste heat from the tank body and residues, and facilitating cleaning and discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front view cross-sectional structural schematic diagram of the utility model;

[0015] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of the middle part A;

[0016] Figure 3 It is a schematic diagram of a partial side cross-sectional structure of the utility model;

[0017] Figure 4 It is a partial three-dimensional structural schematic diagram of the utility model.

[0018] Description of the numbers in the figure:

[0019] 1. Bracket; 2. Bearing seat; 3. Tank body; 4. Inlet valve; 5. Outlet valve; 6. Inlet valve; 7. Discharge valve; 8. Driving unit; 81. Driving motor; 82. Transmission rod; 83. Transmission; 9. Central shaft; 10. Injection device; 101. Water storage tank; 102. Water pump; 11. Recovery tank; 12. Rake rod; 13. Air duct; 14. One-way valve; 15. Pressurizing mechanism; 151. Pressurizing air pump; 152. Rotating joint; 16. Medium chamber; 17. Feed valve; 18. Negative pressure pump; 19. Discharge valve. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0021] See also Figures 1 to 4 In the utility model, a rake type vacuum dryer with waste heat recovery of filter residue comprises a bracket 1, two bearing seats 2 are fixedly mounted on the bracket 1, a central shaft 9 is internally rotatably mounted between the two bearing seats 2, a tank body 3 is fixedly mounted between the two bearing seats 2, a medium cavity 16 is arranged on the inner wall of the tank body 3, a heat medium inlet valve 4 and an outlet valve 5 connected with the medium cavity 16 are arranged on the left and right sides of the top of the tank body 3, a heat recovery medium inlet valve 6 and an outlet valve 7 connected with the medium cavity 16 are arranged on the left and right sides of the bottom of the tank body 3, and the top of the right side of the bracket 1 is provided with a heat recovery medium inlet valve 6 and an outlet valve 7 connected with the medium cavity 16. A driving part 8 is installed on the bottom of the tank body 3, and the output end of the driving part 8 is fixedly connected to the central axis 9. An injection device 10 is installed at the bottom of the inlet valve 6, and a recovery box 11 is installed on the discharge valve 7. Evenly distributed rake rods 12 are installed on the outer side of the central axis 9. An air passage 13 is opened inside the central axis 9, and two rows of one-way valves 14 connected to the air passage 13 are fixedly installed on the central axis 9. A booster mechanism 15 connected to the air passage 13 is installed on the left end of the central axis 9. A feed valve 17 is installed on the top of the tank body 3, and a negative pressure pump 18 is fixedly connected to the right side of the feed valve 17 through a pipeline.

[0022] In the utility model, the bracket 1 is used as the main body of the device. When in use, the wet material is first put into the tank body 3 through the feed valve 17, and then the heat medium is injected into the medium cavity 16 through the feed valve 4 to heat the material inside the tank body 3. At the same time, the driving part 8 is started to drive the central axis 9 to rotate, so as to drive the rake rod 12 to rotate to continuously turn the material, and the negative pressure pump 18 is started to vacuum the inside of the tank body 3 to achieve efficient drying of the material. When the material is dried and discharged, a layer of dry material remains on the inner wall of the tank body 3. At this time, the discharge valve 7 is opened to discharge the heat medium, and then the injection device 10 is started to inject the low-temperature heat medium into the medium cavity 16 to achieve the residual temperature of the tank body 3 and the internal material. The heat medium that has absorbed the heat is then discharged and collected through the discharge valve 7 and used as the heating medium for the next operation, thus saving heating energy. At the same time, the pressurizing mechanism 15 is started to inject high-pressure air into the air passage 13, and the high-pressure air is blown onto the inner wall of the tank body 3 through the one-way valve 14 to blow off the residual material for easy cleaning. Thus, the device has the advantages of recycling the waste heat of the residue and conveniently blowing off the residue for cleaning. This solves the problem that after the drum of the rake vacuum dryer in the prior art dries the material, the residual material solids will adhere to the inner wall, and the drum needs to be opened for cleaning, resulting in poor operating efficiency. At the same time, since the residual solids have a large amount of residual heat, direct cleaning will cause energy waste.

[0023] See also Figure 1 and Figure 2 , wherein: the boosting mechanism 15 includes a boosting air pump 151 and a rotating joint 152, the boosting air pump 151 is fixedly mounted on the bracket 1, the output end of the boosting air pump 151 is fixedly connected to the rotating joint 152, and the other end of the rotating joint 152 is connected and matched with the central axis 9.

[0024] In the present invention, the booster air pump 151 is started to inject high-pressure air into the interior of the air passage 13 through the rotating joint 152, so as to blow off the residual materials inside.

[0025] See also Figure 3 , wherein: the end of the one-way valve 14 away from the air passage 13 is inclined toward the rotation direction.

[0026] In the utility model, the end of the one-way valve 14 away from the air passage 13 is inclined toward the rotation direction, so that when blowing the material, the inner wall of the tank body 3 is fully cleaned as the central axis 9 rotates.

[0027] See also Figure 1, wherein: the driving part 8 includes a driving motor 81, a transmission rod 82 and a transmission 83, the driving motor 81 is fixedly mounted on the bracket 1, the output end of the driving motor 81 is fixedly connected to the input port of the transmission 83 through a coupling, the bottom of the transmission 83 is fixedly mounted on the bracket 1, and the right end of the middle shaft 9 is fixedly connected to the output port of the transmission 83 through a coupling.

[0028] In the present invention, the driving motor 81 is started to drive the transmission rod 82 to rotate, thereby driving the transmission 83 to rotate, thereby driving the central shaft 9 to rotate stably, so as to achieve stable driving.

[0029] See also Figure 1 , wherein: the injection device 10 includes a water tank 101 and a water pump 102, the side of the water tank 101 is fixedly connected to the bracket 1, the water pump 102 is fixedly installed to the top of the water tank 101, the input end of the water pump 102 is connected and fixed to the water tank 101 through a pipeline, and the output end of the water pump 102 is fixedly connected to the inlet valve 6.

[0030] In the present invention, the low-temperature medium in the water storage tank 101 is pumped out by starting the water pump 102 and injected into the medium cavity 16 to absorb the waste heat of the tank body 3 and the residue, thereby realizing heat recovery.

[0031] See also Figure 1 , wherein: a discharge valve 19 is fixedly connected to the bottom of the tank body 3.

[0032] In the utility model, the discharge valve 19 is used to facilitate the discharge of materials.

[0033] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A rake vacuum dryer with residue waste heat recovery, comprising a support (1), characterized in that: Two bearing seats (2) are fixedly mounted on the support (1), a central shaft (9) is internally rotatably mounted between the two bearing seats (2), a tank body (3) is fixedly mounted between the two bearing seats (2), a medium cavity (16) is arranged on the inner wall of the tank body (3), a heat medium inlet valve (4) and an outlet valve (5) in communication with the medium cavity (16) are mounted on the left and right sides of the top of the tank body (3), a heat recovery medium inlet valve (6) and an outlet valve (7) in communication with the medium cavity (16) are mounted on the left and right sides of the bottom of the tank body (3), a driving unit (8) is mounted on the top of the right side of the support (1), and the output of the driving unit (8) is The end of the tank body (3) is fixedly connected to the central axis (9), an injection device (10) is installed at the bottom of the inlet valve (6), a recovery box (11) is installed on the outlet valve (7), evenly distributed rake rods (12) are installed on the outside of the central axis (9), an air passage (13) is opened inside the central axis (9), two rows of one-way valves (14) connected to the air passage (13) are fixedly installed on the central axis (9), a booster mechanism (15) connected to the air passage (13) is installed at the left end of the central axis (9), a feed valve (17) is installed on the top of the tank body (3), and a negative pressure pump (18) is fixedly connected to the right side of the feed valve (17) through a pipeline.

2. The rake type vacuum dryer with residue waste heat recovery according to claim 1, characterized in that: The boost mechanism (15) comprises a boost air pump (151) and a rotating joint (152); the boost air pump (151) is fixedly mounted on the bracket (1); the output end of the boost air pump (151) is fixedly connected to the rotating joint (152); and the other end of the rotating joint (152) is connected and matched with the central axis (9).

3. The rake type vacuum dryer with residue waste heat recovery according to claim 1, characterized in that: An end of the one-way valve (14) away from the air passage (13) is inclined toward the rotation direction.

4. The rake type vacuum dryer with residue waste heat recovery according to claim 1, characterized in that: The driving part (8) comprises a driving motor (81), a transmission rod (82) and a transmission (83); the driving motor (81) is fixedly mounted on the bracket (1); the output end of the driving motor (81) is fixedly connected to the input port of the transmission (83) via a coupling; the bottom of the transmission (83) is fixedly mounted on the bracket (1); and the right end of the middle shaft (9) is fixedly connected to the output port of the transmission (83) via a coupling.

5. The rake type vacuum dryer with residue waste heat recovery according to claim 1, characterized in that: The injection device (10) comprises a water tank (101) and a water pump (102); the side of the water tank (101) is fixedly connected to the bracket (1); the water pump (102) is fixedly installed on the top of the water tank (101); the input end of the water pump (102) is connected and fixed to the water tank (101) through a pipeline; and the output end of the water pump (102) is fixedly connected to the inlet valve (6).

6. The rake type vacuum dryer with residue waste heat recovery according to claim 1, characterized in that: A discharge valve (19) is fixedly connected to the bottom of the tank body (3).

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