Vacuum dryer

Abstract

The utility model provides a vacuum dryer. The vacuum dryer comprises a body, a stirring device, a heating device and a power device, a drying cavity is formed in the body and used for containing materials to be dried. A top cover is arranged on the top of the body and used for sealing the drying cavity. The stirring device is rotatably arranged on the top cover and used for stirring materials in the drying cavity; the power device is fixedly arranged at the upper part of the top cover and used for driving the stirring device to rotate; the body is fixedly provided with a side jacket and a bottom jacket and is used for placing a heat-conducting medium; the heating device is used for heating the heat-conducting medium; the top cover is further provided with a vacuumizing connecting piece in a sealed mode and used for being connected with vacuumizing equipment. According to the vacuum dryer, low-temperature quick drying of water substitute residues is achieved, walnut protein powder with the walnut protein content being 50% or above is obtained, meanwhile, the production technology of firstly smashing and then drying is adopted, and the drying speed is further increased. The equipment is reasonable in structure, easy to operate and high in production efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of walnut processing, in particular to a vacuum dryer. Background Art

[0002] The process and equipment for extracting walnut oil by water substitution has been successfully developed, but this technology has encountered difficulties in the process of promotion. The oil extraction of walnut kernel by water substitution is half oil and half residue. The water substitution residue contains 25%-30% water, 18.6%-28.2% walnut oil, and 50%-54% walnut protein. The water substitution residue has a high water content. If it is not dried, it will deteriorate in 2-3 days and be wasted in vain. At the same time, the water substitution residue not only contains 25%-30% water, but also forms lumps and cannot be dried with ordinary dryers. As a result, the economic benefits of water substitution ecological walnut oil extraction technology are not high and it is difficult to promote. Therefore, how to solve the problem of drying water substitution residue and improve the economic benefits of water substitution ecological walnut oil extraction technology has become an urgent problem to be solved in the current walnut industry. Utility Model Content

[0003] The purpose of the utility model is to provide a vacuum dryer to solve at least one of the above technical problems existing in the prior art.

[0004] In order to solve the above technical problems, the utility model provides a vacuum dryer, comprising: a main body, a stirring device, a heating device and a power device;

[0005] The body is provided with a drying chamber with an open top for placing materials to be dried;

[0006] A top cover is fixedly and sealedly provided on the top of the body, and is used to cover the drying chamber;

[0007] The stirring device is rotatably arranged on the top cover, and is used to stir the material in the drying chamber. A sealing device is arranged between the stirring device and the top cover;

[0008] The top cover and the bottom of the body are respectively provided with a feed inlet and a discharge port, and air blowers are fixedly provided at the feed inlet and the discharge port for sealing the feed inlet and the discharge port and for the inlet and outlet of materials;

[0009] The power device is used to drive the stirring device and the air lock to rotate;

[0010] The outer side wall of the main body and the bottom of the main body are fixedly provided with a side jacket and a bottom jacket for placing a heat-conducting medium for heating the drying chamber;

[0011] The heating device is used to heat the heat-conducting medium;

[0012] The top cover is also sealed with a vacuum connection piece for connection with a vacuum device.

[0013] Furthermore, the side jacket is arranged along the circumferential direction of the outer wall of the body, and an exhaust port is arranged at the upper part of the side jacket for exhausting the air in the side jacket and adding the heat transfer medium;

[0014] A plurality of through holes are provided on the side wall of the body for the heat-conducting medium to flow between the side jacket and the bottom jacket;

[0015] The bottom jacket is provided with a discharge port adapted to the air lock for discharging materials.

[0016] Furthermore, the heating device comprises a box body and an electric heating tube; the box body is fixedly arranged at the bottom of the bottom jacket and is used to store the heat-conducting medium; the electric heating tube is fixedly arranged in the box body and is used to heat the heat-conducting medium in the box body;

[0017] The bottom of the bottom jacket is provided with a plurality of through holes for the heat-conducting medium to flow between the bottom jacket and the box body.

[0018] Furthermore, the power device includes a first motor reducer and a second motor reducer; the first motor reducer drives the stirring device to rotate; and the second motor reducer is used to drive the air shutoff device to rotate.

[0019] Preferably, the stirring device comprises a vertically arranged stirring shaft and a plurality of stirring blades; the stirring blades are fixed along the circumference of the stirring shaft and arranged at the lower end of the stirring shaft; and are used to stir the material in the vacuum drying chamber;

[0020] The stirring shaft passes through the top cover upward and is drivingly connected to the output shaft of the first motor reducer.

[0021] Furthermore, the first motor reducer and the stirring shaft are connected via a first coupling, and the second motor reducer and the input shaft of the air lock are connected via a second coupling.

[0022] Furthermore, a motor bracket is fixedly provided on the top of the top cover for fixed installation of the first motor reducer;

[0023] A reinforcing bracket is fixedly arranged at the bottom of the top cover, and a bearing assembly is arranged between the reinforcing bracket and the stirring shaft.

[0024] Furthermore, the main body is provided with an inspection door, which is sealed with the main body and is used for the entry and exit of personnel during the installation and maintenance of the stirring device. The side wall of the main body is provided with an inspection port adapted to the inspection door.

[0025] Furthermore, it also includes a plurality of leg assemblies, wherein the leg assemblies are fixedly connected to the body and used for fixed support of the body;

[0026] The leg assembly includes a column and a second flange, wherein the second flange is fixedly arranged at both ends of the column; a first flange is fixedly arranged at the bottom of the body for connection with the second flange.

[0027] Preferably, it also includes a control device, which includes an electric control cabinet and a PLC computer board control system for automatic operation of the equipment and transmission and control of data.

[0028] Another aspect of the present invention further provides a drying process of a vacuum dryer, comprising the following steps:

[0029] S1. Crushing: Use a crusher to crush the agglomerated materials or chop them manually. The size of the crushed particles is less than 5mm. The crushed materials are transported to the feed port.

[0030] S2. Preheating the body: Add enough heat-conducting medium into the bottom jacket and side jacket of the body as required, turn on the electric heating tube to heat the heat-conducting medium, and then preheat the drying chamber in the body;

[0031] S3, vacuuming: Turn on the vacuuming equipment to vacuum the drying chamber in the main body;

[0032] S4, drying and dehydration: close the discharge air shutoff, open the stirring device, open the feed air shutoff, send the crushed material into the drying chamber, and close the feed air shutoff; dry and dehydrate the material in the drying chamber, and the material temperature during the drying process is 50℃-60℃; when the moisture content of the material reaches the requirement, open the discharge air shutoff to discharge the material; when the discharge is completed, close the discharge air shutoff and carry out the next round of material drying.

[0033] Furthermore, the vacuum pumping equipment comprises a cooling water circulation tank, a water ring vacuum pump and a buffer tank which are arranged in sequence; an air inlet of the buffer tank is sealedly connected to the vacuum pumping connector.

[0034] The use of a water ring vacuum pump to vacuum dry the material in the drying chamber achieves low-temperature rapid drying, which not only ensures the invariance of the active substances in the walnut water substitute residue, but also ensures that the walnut protein does not deteriorate, effectively improving the utilization rate of the walnut protein.

[0035] By adopting the above technical solution, the utility model has the following beneficial effects:

[0036] The vacuum dryer can achieve rapid drying of water-replaced slag at a relatively low temperature (50°C-60°C), so that the active substances in the walnut meal remain active, and the protein will not be denatured, so that high-quality walnut protein powder with a walnut protein content of more than 50% can be obtained; at the same time, in the production process, according to the characteristics of high water content (25%-30%) and easy agglomeration of water-replaced slag, the water-replaced slag is first broken up and crushed into small particles (5mm) and then vacuum dried, which significantly improves the drying speed. The vacuum dryer and vacuum drying process provided by the utility model have simple equipment structure, easy operation, reasonable process design, high drying efficiency, and provide favorable subsequent guarantees for the promotion of water-replaced ecological walnut oil extraction technology, greatly improving the utilization rate of walnut protein and the economic benefits of water-replaced ecological walnut oil extraction technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 A front view of a vacuum dryer provided in Example 1 of the utility model;

[0039] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0040] Figure 3 for Figure 1 A top view of

[0041] Figure 4 An assembly diagram of a main body and an air lock in a vacuum dryer provided in Example 1 of the utility model;

[0042] Figure 5 A front view of a vacuum dryer provided in Example 1 of the utility model with the top cover removed;

[0043] Figure 6 for Figure 5 Bottom view of

[0044] Figure 7 for Figure 5 Enlarged view of point A in the middle;

[0045] Figure 8 A front view of an upper bottom plate in a vacuum dryer provided in Example 1 of the utility model;

[0046] Fig. 9A front view of a lower bottom plate of a vacuum dryer provided in Example 1 of the utility model;

[0047] Fig.10 A front view of a heating device in a vacuum dryer provided in Example 1 of the utility model;

[0048] Fig.11 for Fig.10 A top view of

[0049] Fig.12 A front view of a stirring device in a vacuum dryer provided in Example 1 of the utility model;

[0050] Fig.13 for Fig.12 A top view of

[0051] Fig.14 A front view of a top cover of a vacuum dryer provided in Example 1 of the utility model;

[0052] Fig.15 for Fig.14 Left view of;

[0053] Fig.16 A schematic diagram of a vacuum dryer drying process provided in Example 1 of the utility model;

[0054] Fig.17 A schematic diagram of a vacuum dryer drying process provided in Example 2 of the utility model;

[0055] Fig.18 This is a front view of the cooling water circulation tank of Example 2 of the utility model;

[0056] Fig.19 This is a schematic diagram of a partial flow channel of Example 2 of the utility model.

[0057] Reference numerals:

[0058] 10-body; 11-drying chamber; 12-top cover; 121-packing sealing device; 122-feeding port; 123-vacuum connection piece; 124-motor reducer bracket; 1241-mounting hole; 125-reinforcement bracket; 126-bearing assembly; 13-side jacket; 131-exhaust port; 14-bottom jacket; 141-upper bottom plate; 1411-discharge port; 142-lower bottom plate; 1421-connecting hole; 1422-square hole; 1423-opening; 143-vertical plate; 144-pull rivet; 15-through hole; 16-inspection port; 17-first flange; 20-air shutoff; 30-stirring device; 31-stirring shaft; 32-stirring blade; 40-power device; 41-first motor reducer; 42-first coupling; 43-second motor reducer; 44-second coupling; 50-heating device; 51-box; 52-electric heating pipe; 53-oil unloading pipe; 60-inspection door; 70-leg assembly; 71-column; 72-second flange; 80-control device; 81-electric control cabinet; 82-digital vacuum gauge; 83-digital oil temperature gauge; 84-digital moisture gauge; 85-digital material temperature gauge; 90-vacuum equipment; 91-buffer tank; 92-water ring vacuum pump; 93-first cooling water circulation Ring tank; 94-boosting pump; 95-second cooling water circulation tank; 951-oil-water separation chamber; 952-water storage chamber; 953-first layer of corrugated plate; 954-second layer of corrugated plate; 9541-small hole; 955-third layer of corrugated plate; 956-first flow channel; 957-second flow channel; 958-oil outlet pipe; 959-water outlet pipe; 100-blade type wet material scatterer without screen bottom; 101-conveyor belt. DETAILED DESCRIPTION

[0059] The present invention will be further explained below in conjunction with specific implementation methods.

[0060] Example 1

[0061] like Figure 1-3 As shown, a vacuum dryer provided in this embodiment includes: a body 10, a stirring device 30, a heating device 50 and a power device 40;

[0062] The main body 10 is cylindrical and has a drying chamber 11 with a top opening 1423 therein for placing the material to be dried.

[0063] A top cover 12 is fixedly and sealedly provided on the top of the body 10, and is used to cover the drying chamber 11;

[0064] The stirring device 30 is rotatably disposed on the top cover 12 and is used to stir the material in the drying chamber 11. A sealing device is disposed between the stirring device 30 and the top cover 12.

[0065] The power device 40 is fixedly disposed on the upper portion of the top cover 12 and is used to drive the stirring device 30 to rotate;

[0066] A side jacket 13 and a bottom jacket 14 are fixedly provided on the outer side wall of the body 10 and the bottom of the body 10, and are used to place a heat-conducting medium for heating the drying chamber 11;

[0067] The heating device 50 is used to heat the heat-conducting medium;

[0068] like Figure 4 As shown, the top cover 12 and the bottom of the body 10 are respectively provided with a feed port 122 and a discharge port 1411, and the feed port 122 and the discharge port 1411 are both fixedly provided with a blower 20 for sealing the feed port 122 and the discharge port 1411 and for the inlet and outlet of materials;

[0069] The top cover 12 is also sealed with a vacuum connection piece 123 for connection with the vacuum equipment 90 .

[0070] like Figure 5-7 As shown, the side jacket 13 is arranged along the circumferential direction of the outer wall of the body 10, and an exhaust port 131 is arranged at the upper part of the side jacket 13 for exhausting the air in the side jacket 13 and adding the heat transfer medium;

[0071] A plurality of through holes 15 are provided on the side wall of the body 10 for the heat transfer medium to flow between the side jacket 13 and the bottom jacket 14;

[0072] The bottom jacket 14 is provided with an upper bottom plate 141, a lower bottom plate 142 and a vertical plate 143; the upper bottom plate 141 and the lower bottom plate 142 are arranged at intervals in the vertical direction and are fixedly connected to the inner wall of the drying chamber 11;

[0073] like Figure 8 As shown, the upper bottom plate 141 is provided with a discharge port 1411 adapted to the air lock 20 for discharging materials;

[0074] like Fig. 9 As shown, the lower base plate 142 is provided with an opening 1423 for the air lock 20 to be installed through;

[0075] Reference Figure 5 and Figure 6 The vertical plate 143 is vertically arranged at the discharge port 1411 and the opening 1423 end, and is used for fixing the upper bottom plate 141 and the lower bottom plate 142 , and at the same time forms a bottom jacket 14 with the upper bottom plate 141 , the lower bottom plate 142 and the side wall of the body 10 .

[0076] In this embodiment, a plurality of rivets 144 are evenly welded between the upper base plate 141 and the lower base plate 142 for fixed connection between the upper base plate 141 and the lower base plate 142 ; the lower base plate 142 is provided with connection holes 1421 for the rivets 144 to pass through.

[0077] The provision of the pull nails 144 prevents the upper base plate 141 and the lower base plate 142 from expanding and bulging due to heat.

[0078] like Figure 10-11 As shown, the heating device 50 includes a trough-shaped box 51 and an electric heating tube 52; the trough-shaped box 51 is fixedly arranged at the bottom of the lower bottom plate 142, and is used to store the heat-conducting medium; the electric heating tube 52 is fixedly arranged in the trough-shaped box 51, and is used to heat the heat-conducting medium in the trough-shaped box 51;

[0079] The lower bottom plate 142 is provided with a plurality of square holes 1422 for the circulation of the heat conducting medium between the bottom jacket 14 and the grooved box 51;

[0080] An oil discharge pipe 53 is fixedly provided at the bottom of the trough-shaped box body 51 for discharging the heat transfer medium.

[0081] In this embodiment, the heat transfer medium is heat transfer oil.

[0082] like Figure 1 As shown, the power device 40 includes a first motor reducer 41 and a second motor reducer 43; the first motor reducer 41 drives the stirring device 30 to rotate; the second motor reducer 43 is used to drive the air lock 20 to rotate.

[0083] In this embodiment, the first motor reducer 41 and the second motor reducer 43 are both direct-connected motors and cycloid pinwheel reducers.

[0084] like Figure 11-12 As shown, the stirring device 30 includes a vertically arranged stirring shaft 31 and a pair of stirring blades 32; the stirring blades 32 are fixed along the circumference of the stirring shaft 31 and are arranged at the lower end of the stirring shaft; and are used to stir the material in the vacuum drying chamber 11;

[0085] The stirring shaft 31 passes through the top cover 12 upwards and is connected to the output shaft of the first motor reducer 41 through a coupling.

[0086] In this embodiment, two stirring blades 32 are provided, which are symmetrically arranged along the circumference of the stirring shaft 31, and the rotation radius of the stirring blades 32 is adapted to the inner diameter of the drying chamber 11; a packing sealing device 121 is provided between the stirring shaft 31 and the top cover 12.

[0087] The first motor reducer 41 and the stirring shaft 31 are connected to each other through a first coupling 42 , and the second motor reducer 43 and the input shaft of the air lock 20 are connected to each other through a second coupling 44 .

[0088] In this embodiment, the first coupling 42 and the second coupling 44 are both composed of symmetrically arranged half couplings.

[0089] A motor reducer bracket 124 is fixedly provided on the top of the top cover 12 for fixed installation of the first motor reducer 41 ; a mounting hole 1241 is opened on the side wall of the motor reducer bracket 124 for assembling the coupling with the first motor reducer 41 and the stirring shaft 31 .

[0090] like Figure 14-15 As shown, a reinforcing bracket 125 is fixedly provided at the bottom of the top cover 12 , and a bearing assembly 126 is provided between the reinforcing bracket 125 and the stirring shaft 31 .

[0091] In this embodiment, the reinforcing bracket 125 is a channel steel. The provision of the channel steel not only increases the supporting strength of the top cover 12, but also improves the operational stability of the device on the top cover 12; the provision of the bearing assembly 126 improves the stability of the rotation of the stirring device 30.

[0092] The main body 10 is also sealed with an inspection door 60 for personnel to enter and exit during installation and maintenance of the stirring device 30 . The side wall of the main body 10 is provided with an inspection opening 16 that matches the inspection door 60 .

[0093] The inspection door 60, the main body 10, the top cover 12, the stuffing sealing device 121 and the air lock 20 form a closed drying space for heating and drying the water-replacing slag.

[0094] It also includes a plurality of leg assemblies 70, which are fixedly connected to the body 10 and used for fixed support of the body 10;

[0095] The leg assembly 70 includes a column 71 and a second flange 72 . The second flange 72 is fixedly arranged at both ends of the column 71 for fixed connection with the body 10 and the ground. A first flange 17 is fixedly arranged at the bottom of the body 10 for connection with the second flange 72 .

[0096] In this embodiment, four leg assemblies 70 are provided for fixed connection and support of the main body 10 .

[0097] Preferably, it also includes a control device 80, which includes an electric control cabinet 81 and a PLC computer board control system for automatic operation of the equipment and transmission and control of data.

[0098] In this embodiment, the control device 80 also includes a digital vacuum meter 82 fixedly mounted on the main body 10, which is used to detect the vacuum degree in the drying chamber 11; a digital oil temperature meter 83, which is used to detect the temperature of the heat transfer oil; a digital moisture meter 84, which is used to detect the moisture content of the water-replacing slag in the drying chamber 11; and a digital material temperature meter 85, which is used to detect the temperature of the water-replacing slag in the drying chamber 11. At the same time, these detected data are transmitted to the control system and displayed on the PLC display screen, thereby controlling the operation of the vacuum dryer to realize the automation and intelligence of the equipment.

[0099] like Fig.16 As shown, another aspect of the present invention further provides a drying process of a vacuum dryer, comprising the following steps:

[0100] S1. Crushing: crushing the agglomerated water-replacement slag with a disintegrator, wherein the size of the crushed particles is less than 5 mm; conveying the crushed water-replacement slag to the feed port 122;

[0101] S2, preheating the body 10: add enough heat transfer oil into the bottom jacket 14 and the side jacket 13 of the body 10 as required, turn on the electric heating pipe 52 to heat the heat transfer oil, and then preheat the drying chamber 11 in the body 10;

[0102] S3, vacuuming: turning on the vacuuming device 90 to vacuum the drying chamber 11 in the body 10;

[0103] S4, drying and dehydration: close the discharge air lock 20, open the stirring device 30, open the feed air lock 20, send the crushed water-substituted slag into the drying chamber 11, and close the feed air lock 20; dry and dehydrate the material in the drying chamber 11, and the material temperature during the drying process is 50°C-60°C; when the moisture content of the water-substituted slag reaches the design requirement, open the discharge air lock 20, and discharge the dried water-substituted slag; when the discharge is completed, close the discharge air lock 20, and carry out the next round of water-substituted slag drying.

[0104] The vacuum pumping device 90 includes a first cooling water circulation tank 93 , a water ring vacuum pump 92 and a buffer tank 91 which are arranged in sequence; the air inlet of the buffer tank 91 is sealedly connected to the vacuum pumping connector 123 .

[0105] In this embodiment, the breaker is a blade-type wet material breaker 100 without a screen bottom, and the broken material is conveyed to the feed port 122 of the vacuum dryer through a conveyor belt 101;

[0106] The low-temperature (50°C-60°C) rapid drying of the water-replaced residue in the drying chamber 11 is achieved by using the non-sieve bottom wet material dispersing machine 100 and the water ring vacuum pump 92, which not only ensures the invariance of the active substances in the walnut water-replaced residue, but also ensures that the walnut protein does not deteriorate, and effectively improves the utilization rate of the walnut protein. At the same time, using this drying process, efficient drying of 100 kg of water-replaced residue per hour can be achieved.

[0107] The vacuum dryer realizes the rapid drying of water-replaced residue at low temperature, so that the active substances in the walnut meal remain active, and the protein will not be denatured, and high-quality walnut protein powder with a walnut protein content of more than 50% can be obtained; at the same time, in the production process, according to the characteristics of high water content (25%-30%) and easy agglomeration of water-replaced residue, the water-replaced residue is first broken up and crushed into small particles (5mm) of water-replaced residue, and then vacuum dried, which significantly improves the drying speed. The vacuum dryer and vacuum drying process provided by the utility model have simple equipment structure, easy operation, reasonable process design, high drying efficiency, and provide favorable subsequent guarantee for the promotion of water-replaced ecological walnut oil extraction technology, which greatly improves the utilization rate of walnut protein and the economic benefits of water-replaced ecological walnut oil extraction technology.

[0108] Example 2

[0109] This embodiment is basically the same as Embodiment 1, except that:

[0110] like Figure 17-19 As shown, the vacuum pumping equipment 90 includes a second cooling water circulation tank 95, a water ring vacuum pump 92 and a buffer tank 91; a booster pump 94 is arranged between the second cooling water circulation tank 95 and the water ring vacuum pump 92, which is used to pressurize and liquefy the oil-water mixed gas extracted from the drying chamber 11 into an oil-water mixed liquid.

[0111] The second cooling water circulation tank 95 is provided with an oil-water separation chamber 951 and a water storage chamber 952; the oil-water separation chamber 951 is arranged in an inverted cone shape, and has a sealed flow channel arranged in a spiral from top to bottom in the oil-water separation chamber 951 for separating the oil-water mixture.

[0112] The sealed flow channel is provided with three layers of corrugated plates arranged in parallel and at intervals. From top to bottom, a first flow channel 956 is formed between the first layer of corrugated plates 953 and the second layer of corrugated plates 954 for the circulation of oil; a second flow channel 957 is formed between the second layer of corrugated plates 954 and the third layer of corrugated plates 955 for the circulation of oil-water mixture.

[0113] The bottom layer of the second flow channel 957, i.e., the upper surface of the third layer of corrugated plate 955, is coated with an oleophobic coating. When the oil-water mixture flows through, it is conducive to forcing the tiny oil molecules in the water to float up and gradually gather. The top layer of the second flow channel 957, i.e., the lower surface of the second layer of corrugated plate 954, is coated with an oleophilic coating. When the oil-water mixture flows through, it tends to adsorb and gather the tiny oil molecules upward. At the same time, the use of corrugated plates can make the mixed liquid flow in a wave-like manner, further promoting the stratification of oil and water of different densities and improving the aggregation effect of oil molecules.

[0114] In addition, a plurality of oil outlet holes 9541 are provided at the wave crests of the second layer of corrugated plate 954 . When the separated small oil droplets are gathered into large oil droplets, they float upward to the first flow channel 956 through the oil outlet holes 9541 .

[0115] The top of the oil-water separation chamber 951 is provided with a liquid inlet which is communicated with the second flow channel 957 and is used for the oil-water mixture pressurized by the booster pump 94 to enter.

[0116] An oil outlet pipe 958 is fixedly arranged at the bottom of the oil-water separation chamber 951 for discharging the walnut oil after separation; one end of the oil outlet pipe 958 is communicated with the first flow channel 956, and the other end of the oil outlet pipe 958 passes through the side wall of the second cooling water circulation tank 95 and is communicated with the external oil storage device.

[0117] A water outlet pipe 959 is also fixedly provided at the bottom of the oil-water separation chamber 951 . One end of the water outlet pipe 959 is communicated with the second flow channel 957 , and the other end is communicated with the water storage chamber 952 , so as to discharge the separated water into the water storage chamber 952 .

[0118] The water outlet of the water storage chamber 952 is connected to the water inlet of the water ring vacuum pump 92 ; the exhaust and drain outlets of the water ring vacuum pump 92 are connected to the inlet of the booster pump 94 .

[0119] In this embodiment, the shape of the oil-water separation chamber 951 is not limited to an inverted cone, but may also be a cone, a cylinder or other shapes for fixing a spirally ascending corrugated plate sealing flow channel.

[0120] In this embodiment, the intervals between the corrugated plates, the height of the crests of the corrugated plates, and the depth of the troughs can be adjusted according to the mixing ratio of the oil-water mixture, that is, the viscosity of the oil.

[0121] In this embodiment, a booster pump 94 and an oil-water separation chamber 951 are provided to convert the oil-water mixed gas extracted from the drying chamber 11 by the water ring vacuum pump 92 into an oil-water mixed liquid, and the oil-water mixed liquid is separated into oil and water, thereby further improving the utilization rate of the walnut oil. At the same time, the separated water is stored in the water storage chamber 952 for the water ring vacuum pump 92, thereby saving water energy.

[0122] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A vacuum dryer, characterized in that , including: main body, stirring device, heating device and power device; The body is provided with a sealed drying chamber for placing and drying materials; The stirring device is rotatably disposed on the body and is used to stir the material in the drying chamber; The top and bottom of the body are respectively provided with a sealed feed inlet and a discharge inlet for the material to enter and exit; The power device is used to drive the stirring device to rotate; The main body is also fixedly provided with a side jacket and a bottom jacket for placing a heat-conducting medium and heating the drying chamber through the heat-conducting medium; The heating device is used to heat the heat-conducting medium; The main body is also provided with a vacuum connection piece for connecting with a vacuum device.

2. The vacuum dryer according to claim 1, characterized in that The feed inlet and the discharge port are fixedly provided with related blowers, which are used for sealing at the feed inlet and the discharge port and for the entry and exit of materials.

3. The vacuum dryer according to claim 2, characterized in that The side jacket is arranged along the circumference of the outer wall of the body, and an exhaust port is arranged on the upper part of the side jacket for exhausting the air in the side jacket and adding the heat transfer medium; A plurality of through holes are provided on the side wall of the body for the heat-conducting medium to flow between the side jacket and the bottom jacket; The bottom jacket is provided with the discharge port adapted to the air lock for discharging materials.

4. The vacuum dryer according to claim 3, characterized in that The heating device includes a box body and an electric heating tube; the box body is fixedly arranged at the bottom of the bottom jacket for storing the heat-conducting medium; the electric heating tube is fixedly arranged in the box body for heating the heat-conducting medium in the box body; The bottom of the bottom jacket is provided with a plurality of through holes for the heat-conducting medium to flow between the bottom jacket and the box body.

5. The vacuum dryer according to claim 2, characterized in that The power device includes a first motor reducer for driving the stirring device to rotate and a second motor reducer for driving the air shutoff device to rotate.

6. The vacuum dryer according to claim 5, characterized in that The stirring device comprises a vertically arranged stirring shaft and a plurality of stirring blades; the stirring blades are fixed and arranged at intervals along the circumference of the stirring shaft; and are used to stir the material in the vacuum drying chamber; The stirring shaft is drivingly connected to the output shaft of the first motor reducer.

7. The vacuum dryer according to claim 6, characterized in that A top cover is fixedly and sealedly provided on the top of the body, and a motor reducer bracket is fixedly provided on the top of the top cover for fixed installation of the first motor reducer.

8. The vacuum dryer according to claim 1, characterized in that , further comprising a plurality of leg assemblies, wherein the leg assemblies are fixedly connected to the body and are used for fixed support of the body; The leg assembly includes a column and a second flange, wherein the second flange is fixedly arranged at both ends of the column; a first flange is fixedly arranged at the bottom of the body for connection with the second flange.

9. The vacuum dryer according to claim 1, characterized in that: The vacuum pumping equipment comprises a cooling water circulation tank, a water ring vacuum pump and a buffer tank which are arranged in sequence; the air inlet of the buffer tank is sealedly connected to the vacuum pumping connector and is used for vacuum pumping in the drying chamber.

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