Microwave vacuum low-temperature liquid continuous belt dryer

Abstract

The utility model discloses a microwave vacuum low-temperature liquid continuous belt dryer which comprises a concentration device, a main machine device, a material distributing device, a material collecting device, a packaging device, a vacuum device and a cold water device. Wherein the liquid product is primarily evaporated through the concentration device; the host device comprises a cavity and a plurality of belt conveying modules; a plurality of groups of first microwave generators are arranged on the cavity; the distributing device is connected with the concentrating device and the plurality of belt conveying modules respectively; the material collecting device is connected with the plurality of belt conveying modules; the packaging device is connected with the material collecting device; a vacuum port of the vacuum device is respectively communicated with the top and two sides of the cavity through a plurality of groups of vacuum pipes; a cooling water pipe of the cold water device is communicated with the first microwave generator; and the cold water device is used for cooling the first microwave generator and the microwave power supply. The device is high in automation degree, high in efficiency and capable of continuously running for a long time.

Description

Technical Field

[0001] The utility model relates to the technical field of microwave vacuum low-temperature drying equipment, and particularly relates to a microwave vacuum low-temperature liquid continuous belt dryer. Background Technique

[0002] Vacuum continuous liquid belt dryers are a type of drying equipment with relatively frequent applications. They are widely used in industries such as food, pharmaceuticals, and chemicals. The heat sources of existing vacuum continuous belt dryers are media such as steam, superheated water, and heat-conducting oil, and require supporting infrastructure such as steam. Their heat transfer method mainly relies on conduction. The heating plate transfers heat to the track belt, and then the track belt transfers heat to the material, with a low heat transfer coefficient, seriously affecting the drying efficiency. For heat-sensitive materials (such as traditional Chinese medicine powders, etc.), due to the limitation of the temperature upper limit, the temperature of the heating medium needs to be maintained at a low level to prevent damage to the internal molecular structure of the product to be evaporated, etc. Therefore, its drying efficiency will be even lower. Therefore, technicians have developed microwave vacuum low-temperature drying equipment, which can evaporate the moisture in the product to be dried at a low temperature, thereby achieving the drying purpose.

[0003] The patent document with the patent number and publication number CN118031574A discloses a tunnel-type microwave vacuum ultra-low temperature drying equipment and a material drying process, which are used for drying materials. The tunnel-type microwave vacuum ultra-low temperature drying equipment includes: a main equipment, the main equipment includes a cavity and a plurality of first microwave generators. The cavity is a cylindrical structure, and the cross-sectional shape of the cylinder inside the cavity is a regular polygon. The plurality of first microwave generators are respectively arranged on the outer wall surface of the cavity and are at least arranged in sequence along the length direction of the cavity; a vacuum unit, the vacuum port of the vacuum unit is connected to the cavity through a pipeline; a chiller, the cooling water pipe of the chiller is connected to the first microwave generator, and the chiller is used to cool the first microwave generator. By utilizing the characteristic that microwave can generate heat through the oscillation of polar molecules, and supplemented by the vacuum unit to evacuate the cavity, the water-containing materials in the cavity can be quickly and low-temperature evaporated in a vacuum environment to achieve drying, with high drying efficiency. In addition, it can avoid damage to the materials due to excessive temperature. However, this utility model has the following deficiencies: 1) This utility model belongs to intermittent microwave low-temperature evaporation, that is, after evaporating a batch of products, the cavity needs to be opened and new products to be evaporated need to be sent in. Its continuity is not very high, mainly for the evaporation of solid products, especially products such as packaging paper bags; 2) It is not suitable for the evaporation of liquid products, especially continuous evaporation; 3) The requirements for the conveyor inside the cavity are not high.

[0004] In addition, the problems that need to be solved for low-temperature concentration of liquids are as follows: 1) How to clean the inside of the cavity; 2) How to control the initial concentration of the liquid entering the vacuum cavity; 3) How to evenly distribute the liquid on the conveying mechanism to ensure the evaporation effect; 4) How to correct the deviation and clean the belt of the conveying mechanism; 5) How to collect and pack the dried product under vacuum; 6) How to timely drain the water in the water collection tank in a continuous operation vacuum environment; 7) How to save energy as much as possible. Summary of the Invention

[0005] According to an embodiment of the present invention, there is provided a microwave vacuum low-temperature liquid continuous belt dryer, comprising:

[0006] A concentration device, through which the liquid product is preliminarily evaporated;

[0007] A main machine device, which includes a cavity and several belt conveying modules; several groups of first microwave generators are arranged on the cavity, and the several groups of first microwave generators are respectively matched with the several belt conveying modules;

[0008] A cloth feeding device, which is respectively connected with the concentration device and the several belt conveying modules, and can evenly distribute the liquid product in the concentration device on the several belt conveying modules;

[0009] An aggregate device, which is connected with the several belt conveying modules and can collect and crush the dried product;

[0010] A packaging device (prior art), which is connected with the aggregate device and can pack the crushed product;

[0011] A vacuum device, the vacuum port of which is respectively connected to the top and both sides of the cavity through multiple groups of vacuum tubes;

[0012] A cold water device (prior art), the cooling water pipe of which is connected to the first microwave generator, and the cold water device is used to cool the first microwave generator and its microwave power supply.

[0013] Furthermore, the concentration device includes: a raw material tank, at least one first microwave heating tank and at least one first evaporation tank;

[0014] The raw material tank is used for storing the liquid product;

[0015] A first support frame is arranged in the first microwave heating tank, a first coil pipe is wound around the first support frame from bottom to top, the first coil pipe is communicated with the raw material tank, and the liquid product in the raw material tank can enter the first coil pipe through a delivery pump;

[0016] Several second microwave generators are arranged on the first microwave heating tank;

[0017] A spherical distributor is arranged inside the first evaporation tank. A number of first spray heads are arranged on the spherical distributor, and the spherical distributor is connected to the first coil pipe. The first evaporation tank is connected to an external vacuum device through a vacuum pipe. A discharge port is arranged at the bottom of the first evaporation tank. The preliminarily evaporated liquid product can return to the raw material tank through a pipeline from the discharge port or enter the next process; and / or

[0018] The first microwave heating tank and the first evaporation tank are arranged alternately.

[0019] Furthermore, the main machine device further includes: a cleaning module, a detection module, a pair of sealing doors and a pair of first driving modules;

[0020] The cleaning module includes a water storage tank and several groups of cleaning spray heads. The water storage tank is connected to the several groups of cleaning spray heads through a water pipe, and the water in the water storage tank can be conveyed to the several groups of cleaning spray heads through a water pump. Spray head fixing parts that can be threadedly connected to the cleaning spray heads are arranged on the cavity, and the cleaning spray heads are fixed inside the cavity through the spray head fixing parts;

[0021] The detection module includes several pressure sensors, several temperature sensors, several cameras, several explosion-proof lights and several first exhaust valves; several pressure sensors and several first exhaust valves are respectively arranged on the top of the cavity; several temperature sensors and several explosion-proof lights are respectively arranged on the top and both sides of the cavity; several cameras are respectively arranged on the sealing doors and are arranged in sequence from top to bottom along the sealing doors;

[0022] A pair of sealing doors are arranged at both ends of the cavity for sealing the cavity; the sealing doors are of a double-layer structure, and heat-insulating cotton is arranged between the double-layer doors;

[0023] A pair of first driving modules are connected to a pair of sealing doors in one-to-one correspondence and can drive the sealing doors to open and close.

[0024] Furthermore, the first driving module includes: a first fixing frame, a first driving motor, a first driving shaft, a pair of first chains and a pair of second fixing frames;

[0025] The first driving motor is connected to the first driving shaft and can drive the first driving shaft to rotate;

[0026] A pair of first chains are arranged at both ends of the first driving shaft, and the first driving shaft can drive the pair of first chains to move;

[0027] Both sides of the sealing door are slidably connected to a pair of second fixing frames through first guide rails. Several first driving cylinders are arranged on the second fixing frames, and the output ends of the first driving cylinders are connected to the sealing door and can drive the sealing door to move back and forth;

[0028] A pair of second guide rails and a pair of third guide rails are provided on the first fixing frame, and the second guide rails are V-shaped; the pair of second guide rails and the pair of third guide rails respectively correspond to a pair of second fixing frames one by one;

[0029] A number of first pulleys, a fall arrester, a pair of elastic pull rods (prior art), and a pair of first position sensors are provided on the second fixing frame,

[0030] The number of first pulleys are slidably connected to the second guide rails, and V-shaped grooves are provided on the first pulleys;

[0031] The fall arrester is slidably connected to the third guide rail and is used for the emergency braking of the sealing door;

[0032] A pair of elastic pull rods are respectively connected to both ends of the first chain;

[0033] A pair of first position sensors respectively correspond to a pair of elastic pull rods one by one and are used for detecting the positions of the pair of elastic pull rods.

[0034] Furthermore, the belt conveying module includes: a third fixing frame, a second driving motor, a conveying belt, a driving roller, and a driven roller;

[0035] The output end of the second driving motor is connected to the driving roller; the conveying belt is respectively connected to the driving roller and the driven roller; the driving roller and the driven roller are respectively arranged at both ends of the third fixing frame; the second driving motor is arranged outside the cavity and is connected to the cavity through a magneto-rheological fluid sealing structure;

[0036] A pair of first limiting strips are provided at the upper end of the conveying belt, and a pair of second limiting strips are provided at the lower end thereof. The first limiting strips and the second limiting strips are as long as the conveying belt;

[0037] First annular grooves coupled to the second limiting strips are provided on the driving roller and the driven roller.

[0038] Furthermore, the belt conveying module further includes: a number of first supporting rollers, a pair of first adjusting rollers, a second adjusting roller, a number of first supporting plates, a cooling plate, and a scraper;

[0039] The number of first supporting rollers are respectively connected to the third fixing frame and are arranged below the conveying belt. The tops of the first supporting rollers are placed between the pair of first limiting strips;

[0040] A pair of first adjusting rollers are respectively connected to the third fixing frame and are arranged between the upper and lower layers of the conveying belt. The bottoms of the first adjusting rollers are placed between the pair of second limiting strips;

[0041] The second adjusting roller is located below the conveying belt and is arranged between the pair of first adjusting rollers. Its top is located between the pair of first limiting strips, and its two ends are respectively connected to the third fixing frame through a pair of first adjusting bolts. The first adjusting bolts can adjust the vertical position of the second adjusting roller;

[0042] A number of first support plates are sequentially arranged below the upper conveyor belt and located between a pair of second limiting strips of the upper conveyor belt, playing a role in supporting and limiting the conveyor belt.

[0043] A number of first water leakage holes are provided on the first support plate.

[0044] The cooling plate is arranged adjacent to the first support plate, is provided below the output end of the conveyor belt, and is connected to an external cooling device.

[0045] Both ends of the scraper are connected to the third fixing frame, and the scraper is arranged at the output end of the conveyor belt, and is used to separate the dried product from the conveyor belt.

[0046] Furthermore, the feeding device includes: a first storage tank, a first rotor pump, a number of first screw pumps, a feeding rack, and a feeding driving motor.

[0047] The first storage tank is connected to the concentration device and is used to store the concentrated liquid product.

[0048] The first rotor pump is respectively connected to the first storage tank and a number of first screw pumps, and conveys the liquid product to the number of first screw pumps through a pipeline.

[0049] The feeding driving motor is arranged at the top of the cavity, and its output end is connected to the feeding rack, and can drive the feeding rack to swing reciprocally.

[0050] The feeding rack is arranged at the input end of the belt conveying module, and a number of swing rods are arranged thereon. Cloth spraying nozzles are arranged on the swing rods, and the number of swing rods corresponds to the number of belt conveying modules.

[0051] A number of first screw pumps are respectively connected to the cloth spraying nozzles on the number of swing rods through pipelines.

[0052] Furthermore, the aggregate device includes: a first driving mechanism, a crushing rack, a first screw conveyor, a hammer mill, a second screw conveyor, a pneumatic butterfly valve, a first air lock, and a second storage tank.

[0053] The first driving mechanism is arranged at the top of the cavity, and its output end is connected to the crushing rack, and can drive the crushing rack to move up and down.

[0054] The crushing rack is arranged at the output end of the belt conveying module and includes a number of crushing plates, and the number of crushing plates corresponds to the number of belt conveying modules one by one.

[0055] The first screw conveyor is arranged below the crushing rack and is connected to the output end of the belt conveying module, and is used to convey the dried product out of the cavity.

[0056] The hammer mill is connected to the first screw conveyor and is used for crushing products; the motor of the hammer mill is sealed with the crushing chamber through a magneto-fluid sealing structure;

[0057] A pneumatic butterfly valve, and the second screw conveyor is connected to the first air lock through the pneumatic butterfly valve;

[0058] One end of the second screw conveyor is connected to the hammer mill, and the other end is connected to the second storage tank through the first air lock, and is used for conveying the crushed products into the second storage tank; the second storage tank is connected to the packaging device.

[0059] Further, the packaging device includes: a material suction mechanism (prior art) and an automatic packaging machine (prior art);

[0060] The material suction mechanism extracts the material from the second storage tank and sends it into the automatic packaging machine for packing.

[0061] Further, it also includes an ultra-low temperature water capture system (prior art) and a water collection tank;

[0062] The ultra-low temperature water capture system includes a refrigeration unit, a heat exchanger, an evaporator and a condenser. The vacuum port of the vacuum device is connected to the cavity after passing through the condenser and evaporator of the ultra-low temperature water capture system;

[0063] The water collection tank is divided into an upper water collection chamber and a lower water collection chamber. The top of the upper water collection chamber is respectively connected to the condenser and the vacuum tube of the vacuum device; the lower water collection chamber is connected to the condenser through a first connecting pipe, and a first control valve is arranged on the first connecting pipe;

[0064] The bottom of the upper water collection chamber and the top of the lower water collection chamber are connected through a second connecting pipe, and a second control valve is arranged on the second connecting pipe;

[0065] A liquid level gauge and a second exhaust valve are arranged on one side of the lower water collection chamber, and a drain pump is connected to the bottom thereof. A third control valve is arranged between the drain pump and the lower water collection chamber.

[0066] Advantages of the embodiments of the present utility model: 1) Suitable for drying liquid products. Vacuum microwave concentration drying is adopted, reducing the drying temperature of liquid products and avoiding the damage to the molecular structure or performance of the products caused by high-temperature drying; 2) Limit strips are provided on the conveyor belt, removing the automatic deviation-correcting cylinder, simplifying the structure, reducing power consumption, and at the same time avoiding the interference of the deviation-correcting cylinder with the microwave in the cavity during operation; 3) The cleaning nozzles are arranged on the cavity wall, and no spraying rack is arranged in the cavity, also avoiding the interference of the spraying rack with the microwave; 4) A concentration device is adopted to control the concentration of the liquid products entering the cavity; 5) A first rotor pump is arranged in the feeding device to adjust the same flow rate of the liquid products entering a number of first screw pumps, making the spraying flow rate of each feeding nozzle consistent; 6) The sealing door moves up and down, reducing the floor area; at the same time, an anti-falling mechanism and an induction mechanism are adopted to prevent the sealing door from falling and prevent the first driving motor from continuing to rotate after falling; 7) It can operate continuously for a long time, and the water in the water collector can be discharged without stopping the machine; 8) The degree of automation is high, and the dried products can be output, crushed and collected and packed in time.

[0067] It is to be understood that both the foregoing general description and the following detailed description are exemplary and intended to provide further explanation of the claimed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] Figure 1 Partial structural schematic diagram according to an embodiment of the present utility model;

[0069] Figure 2 First structural schematic diagram of the main machine device according to an embodiment of the present utility model;

[0070] Figure 3 For Figure 2 front view;

[0071] Figure 4 For Figure 3 A-A cross-sectional view;

[0072] Figure 5 For Figure 4 enlarged view at A;

[0073] Figure 6 For Figure 4 enlarged view at B;

[0074] Figure 7 Structural schematic diagram of the concentration device according to an embodiment of the present utility model;

[0075] Figure 8 Structural schematic diagram of the first microwave heating tank according to an embodiment of the present utility model;

[0076] Figure 9Schematic diagram of the internal structure of a concentration device according to an embodiment of the present utility model;

[0077] Figure 10 This is a partial enlarged view of the cavity surface according to an embodiment of the present utility model;

[0078] Figure 11 Schematic diagram of the structure of a material distribution device according to an embodiment of the present utility model;

[0079] Figure 12 Schematic diagram of the structure of several belt conveyor modules according to an embodiment of the present utility model;

[0080] Figure 13 for Figure 12 The main view;

[0081] Figure 14 for Figure 13 AA section view;

[0082] Figure 15 for Figure 14 Enlarged view of point E;

[0083] Figure 16 for Figure 13 CC sectional view;

[0084] Figure 17 This is a top view of the belt conveyor module according to an embodiment of the present utility model with the conveyor belt removed;

[0085] Figure 18 Schematic diagram of the structure between the first adjusting roller, the second adjusting roller and the conveyor belt according to an embodiment of the present utility model;

[0086] Figure 19 This is a partial enlarged view of the output end of the belt conveyor module according to an embodiment of the present utility model;

[0087] Figure 20 It is a partial structural schematic diagram of a material collecting device according to an embodiment of the present utility model;

[0088] Figure 21 This is an assembly diagram between the sealing door and the first driving module according to an embodiment of the present utility model;

[0089] Figure 22 for Figure 21 Enlarged view of point F;

[0090] Figure 23 for Figure 21 The main view;

[0091] Figure 24 for Figure 21 A top view of

[0092] Figure 25 Partial enlarged view between the sealed door and the first drive module;

[0093] Figure 26 Schematic diagram of the water collection tank connected to the vacuum device and the condenser according to an embodiment of the present invention;

[0094] Figure 27 Structural schematic diagram of the water collection tank according to an embodiment of the present invention;

[0095] Figure 28 Internal structure diagram of the water collection tank according to an embodiment of the present invention. Detailed implementation manners

[0096] Hereinafter, with reference to the accompanying drawings, the preferred embodiments of the present invention will be described in detail to further elaborate on the present invention.

[0097] First, in combination with Figures 1 - 28 Describe the microwave vacuum low-temperature liquid continuous belt dryer according to an embodiment of the present invention, which is used in industries such as chemical engineering, food, and medicine, and has a wide range of application scenarios.

[0098] As Figures 1 - 28 shown, the microwave vacuum low-temperature liquid continuous belt dryer according to an embodiment of the present invention includes: [[ID=3…]]

[0099] Concentration device 1, and the liquid product is preliminarily evaporated through the concentration device 1;

[0100] Main machine device 2, the main machine device 2 includes a cavity 21 and a plurality of belt conveying modules 22; a plurality of groups of first microwave generators 23 are arranged on the cavity 21, and the plurality of groups of first microwave generators 23 are respectively matched with the plurality of belt conveying modules 22;

[0101] Feeding device 28, the feeding device 28 is respectively connected to the concentration device 1 and the plurality of belt conveying modules 22, and can evenly arrange the liquid product in the concentration device 1 on the plurality of belt conveying modules 22;

[0102] Aggregate device 29, the aggregate device 29 is connected to the plurality of belt conveying modules 22, and can collect and crush the dried product;

[0103] Packaging device 5, the packaging device 5 is connected to the aggregate device 29, and can pack the crushed product;

[0104] Vacuum device 6, the vacuum port of the vacuum device 6 is respectively connected to the top and both sides of the cavity 21 through a plurality of groups of vacuum tubes 61;

[0105] Cooling water device 7, the cooling water pipe of the cooling water device 7 is connected to the first microwave generator 23, and the cooling water device 7 is used to cool the first microwave generator 23 and its microwave power supply.

[0106] Furthermore, as Figures 7 - 9 shown, in this embodiment, the concentration device 1 includes: a raw material tank 11, at least one first microwave heating tank 12, and at least one first evaporation tank 13;

[0107] The raw material tank 11 is used to hold the liquid product;

[0108] A first support frame 121 is arranged inside the first microwave heating tank 12. The first support frame 121 is wound with a first coiled pipe 122 from bottom to top. The first coiled pipe 122 is connected to the raw material tank 11, and the liquid product in the raw material tank 11 can enter the first coiled pipe 122 through a delivery pump;

[0109] A number of second microwave generators 123 are arranged on the first microwave heating tank 12, and the second microwave generators 123 perform microwave heating on the first microwave heating tank 12;

[0110] A spherical distributor 131 is arranged inside the first evaporation tank 13. A number of first nozzles 1311 are arranged on the spherical distributor 131. The spherical distributor 131 is connected to the first coiled pipe 122. The first evaporation tank 13 is connected to an external vacuum device through a vacuum pipe; during operation, the first evaporation tank 13 is in a vacuum state. After the microwave-heated liquid product is sprayed into the first evaporation tank 13, part of the moisture therein undergoes flash evaporation and turns into water vapor, which is pumped away by the external vacuum device; a discharge port is arranged at the bottom of the first evaporation tank 13. The preliminarily evaporated liquid product can return to the raw material tank 11 through a pipeline from the discharge port or enter the next process. When there is only one evaporation tank, the product can be sent back to the raw material tank 11 for secondary evaporation and drying, and when the product concentration is qualified, it can directly enter the next process; and / or

[0111] The first microwave heating tank 12 and the first evaporation tank 13 are arranged alternately, and the number of the first microwave heating tank 12 and the first evaporation tank 13 can be selected according to requirements or site space.

[0112] Furthermore, as Figures 1 - 4 shown in FIGS. 21-25, in this embodiment, the host device 2 further includes: a cleaning module 24, a detection module 25, a pair of sealing doors 26, and a pair of first driving modules 27;

[0113] The cleaning module 24 includes a water storage tank 241 and a number of groups of cleaning nozzles 242. The water storage tank 241 is connected to the number of groups of cleaning nozzles 242 through a water pipe. The water in the water storage tank 241 can be delivered to the number of groups of cleaning nozzles 242 through a water pump. The water pump is connected to the cleaning nozzles 242 through a water pipe; a nozzle fixing member 243 that can be threadedly connected to the cleaning nozzles 242 is arranged on the cavity 21. The cleaning nozzles 242 are fixed inside the cavity 21 through the nozzle fixing member 243, so that the nozzles are detachably arranged on the inner wall of the cavity 21;

[0114] The detection module 25 includes a number of pressure sensors 251, a number of temperature sensors 252, a number of cameras 253, a number of explosion-proof lights 254 and a number of first exhaust valves; the number of pressure sensors 251 and the number of first exhaust valves are respectively arranged on the top of the cavity 21; the number of temperature sensors 252 and the number of explosion-proof lights 254 are respectively arranged on the top and both sides of the cavity 21; the number of cameras 253 are respectively arranged on the sealing door 26 and are arranged in sequence from top to bottom along the sealing door 26, corresponding to the number of belt conveying modules 22, so as to detect the drying condition of the products on the corresponding belt conveying modules 22;

[0115] A pair of sealing doors 26 are arranged at both ends of the cavity 21 for sealing the cavity 21; the sealing door 26 is of a double-layer structure, and heat-insulating cotton is arranged between the double-layer doors;

[0116] A pair of first driving modules 27 are connected to a pair of sealing doors 26 in one-to-one correspondence and can drive the sealing doors 26 to open and close.

[0117] Further, as Figures 21 - 25 shown, in this embodiment, the first driving module 27 includes: a first fixing frame 271, a first driving motor 272, a first driving shaft 273, a pair of first chains 274 and a pair of second fixing frames 275;

[0118] The first driving motor 272 is connected to the first driving shaft 273 and can drive the first driving shaft 273 to rotate;

[0119] A pair of first chains 274 are arranged at both ends of the first driving shaft 273, and the first driving shaft 273 can drive the pair of first chains 274 to move;

[0120] Both sides of the sealing door 26 are respectively slidably connected to a pair of second fixing frames 275 through first guide rails 2751. A number of first driving cylinders 2752 are arranged on the second fixing frames 275. The output ends of the first driving cylinders 2752 are connected to the sealing door 26 and can drive the sealing door 26 to move back and forth, so that the sealing door 26 seals or moves away from the cavity 21;

[0121] A pair of second guide rails 2711 and a pair of third guide rails 2712 are arranged on the first fixing frame 271, and the second guide rails 2711 are V-shaped; the pair of second guide rails 2711 and the pair of third guide rails 2712 respectively correspond to the pair of second fixing frames 275;

[0122] A number of first pulleys 2753, anti-falling devices 2754, a pair of elastic pull rods 2755 and a pair of first position sensors 2756 are arranged on the second fixing frames 275,

[0123] A number of first pulleys 2753 are slidably connected to the second guide rail 2711. A V-shaped groove is provided on the first pulley 2753, and the V-shaped groove is slidably coupled with the second guide rail 2711;

[0124] The anti-falling device 2754 is slidably connected to the third guide rail 2712 and is used for the emergency braking of the sealing door 26 to prevent the sealing door 26 from falling;

[0125] A pair of elastic pull rods 2755 are respectively connected to both ends of the first chain 274. The first chain 274 can drive the second fixing bracket 275 to move up and down through the pair of elastic pull rods 2755;

[0126] A pair of first position sensors 2756 respectively correspond to the pair of elastic pull rods 2755 one by one and are communicatively connected to the first drive motor 272 for detecting the positions of the pair of elastic pull rods 2755. The elastic pull rod 2755 includes a pull rod and a spring. When the chain is tensioned, the pull rod is tightened and the spring is stretched or compressed. When the first chain 274 breaks, due to the elastic force of the spring, the pull rod resets, and the position sensor detects and transmits it to the first drive motor 272, and the first drive motor 272 stops, avoiding secondary accidents.

[0127] Further, as shown in Figures 4 - 6 Figures 12 to 19, in this embodiment, the belt conveying module 22 includes: a third fixing bracket 221, a second drive motor 222, a conveying belt 223, a driving roller 224 and a driven roller 225;

[0128] The output end of the second drive motor 222 is connected to the driving roller 224; the conveying belt 223 is respectively connected to the driving roller 224 and the driven roller 225; the driving roller 224 and the driven roller 225 are respectively arranged at both ends of the third fixing bracket 221;

[0129] A pair of first limiting strips 2231 are arranged at the upper end of the conveying belt 223, and a pair of second limiting strips 2232 are arranged at the lower end thereof. The first limiting strips 2231 and the second limiting strips 2232 are of the same length as the conveying belt 223; the pair of first limiting strips 2231 are used to prevent the liquid product from separating from the conveying belt 223;

[0130] The driving roller 224 and the driven roller 225 are provided with first annular grooves 2241 coupled with the second limiting strips 2232 to prevent the conveying belt 223 from deviating from the driving roller 224 or the driven roller 225.

[0131] Further, as shown in Figures 16 - 19 Figures, in this embodiment, the belt conveying module 22 further includes: a number of first supporting rollers 226, a pair of first adjusting rollers 227, a second adjusting roller 228, a number of first supporting plates 2210, a cooling plate 2211 and a scraper;

[0132] A number of first support rollers 226 are respectively connected to the third fixing frame 221 and are arranged below the conveyor belt 223. The top of the first support roller 226 is placed between a pair of first limiting strips 2231;

[0133] A pair of first adjusting rollers 227 are respectively connected to the third fixing frame 221 and are arranged between the upper and lower layers of the conveyor belt 223. The bottom of the first adjusting roller 227 is placed between a pair of second limiting strips 2232;

[0134] The second adjusting roller 228 is located below the conveyor belt 223 and is arranged between a pair of first adjusting rollers 227. Its top is located between a pair of first limiting strips 2231, and its two ends are respectively connected to the third fixing frame 221 through a pair of first adjusting bolts 229. The first adjusting bolt 229 can adjust the up and down position of the second adjusting roller 228;

[0135] A number of first support plates 2210 are sequentially arranged below the upper conveyor belt 223 and are located between a pair of second limiting strips 2232 of the upper conveyor belt 223, playing a role in supporting and limiting the conveyor belt 223;

[0136] A number of first water leakage holes are provided on the first support plate 2210, facilitating the outflow of water during shutdown cleaning;

[0137] The cooling plate 2211 is arranged adjacent to the first support plate 2210, is arranged below the output end of the conveyor belt 223, and is connected to an external cooling device. When the product is completely dried, it is cooled through the cooling plate 2211;

[0138] Both ends of the scraper are connected to the third fixing frame 221 and are arranged at the output end of the conveyor belt 223, used for separating the dried product from the conveyor belt 223.

[0139] Further, as Figure 1 、 11 shown, in this embodiment, the cloth feeding device 28 includes: a first storage tank (not shown in the figure), a first rotor pump 282 and a number of first screw pumps 283, a cloth feeding frame 284 and a cloth feeding drive motor 285;

[0140] The first storage tank is connected to the concentration device 1 and is used for storing the concentrated liquid product;

[0141] The first rotor pump 282 is respectively communicated with the first storage tank and a number of first screw pumps 283, and conveys the liquid product to a number of first screw pumps 283 through a pipeline;

[0142] The cloth feeding drive motor 285 is arranged on the top of the cavity 21, and its output end is connected to the cloth feeding frame 284, capable of driving the cloth feeding frame 284 to swing reciprocally;

[0143] The fabric rack 284 is arranged at the input end of the belt conveying module 22, and a number of swing rods 2841 are arranged thereon. A fabric spray head 2842 is arranged on the swing rod 2841, and the number of swing rods 2841 corresponds to the number of belt conveying modules 22.

[0144] A number of first screw pumps 283 are respectively connected to the fabric spray heads 2842 on the number of swing rods 2841 through pipelines; the first rotor pump 282 provides a certain pressure so that the pressure of the liquid material entering each first screw pump 283 is the same, preventing the influence on the microwave drying effect caused by different flow rates of each fabric spray head 2842 due to gravity.

[0145] Furthermore, as Figure 6 、 20 shown, in this embodiment, the aggregate device 29 includes: a first driving mechanism 291, a crushing rack 292, a first screw conveyor 293, a hammer mill 294, a second screw conveyor 295, a pneumatic butterfly valve (not shown in the figure), a first air lock 296 and a second storage tank 297;

[0146] The first driving mechanism 291 is arranged at the top of the cavity 21, and its output end is connected to the crushing rack 292, and can drive the crushing rack 292 to move up and down;

[0147] The crushing rack 292 is arranged at the output end of the belt conveying module 22, and includes a number of crushing plates 2921, and the number of crushing plates 2921 corresponds to the number of belt conveying modules 22 one by one;

[0148] The first screw conveyor 293 is arranged below the crushing rack 292 and is connected to the output end of the belt conveying module 22, and is used to convey the dried product out of the cavity 21;

[0149] The hammer mill 294 is connected to the first screw conveyor 293 and is used to crush the product; the motor of the hammer mill 294 and the crushing chamber are sealed by a magneto - hydrodynamic sealing structure 2941;

[0150] The pneumatic butterfly valve, the second screw conveyor 295 is connected to the first air lock 296 through the pneumatic butterfly valve;

[0151] One end of the second screw conveyor 295 is connected to the hammer mill 294, and the other end is connected to the second storage tank 297 through the first air lock 296, and is used to convey the crushed product into the second storage tank 297; the second storage tank 297 is connected to the packaging device 5.

[0152] In the initial state, the pneumatic butterfly valve is in the closed state. When the hammer mill 294 works, the pneumatic butterfly valve opens, and the crushed material enters the second storage tank 297 through the first air lock 296.

[0153] Further, as Figure 1 shown, in this embodiment, the packaging device 5 includes: a material suction mechanism 51 and an automatic packaging machine 52;

[0154] The material suction mechanism 51 extracts the material from the second storage tank 297 and feeds it into the automatic packaging machine 52 for packing.

[0155] Further, as Figure 1 , 26 ~28 shown, in this embodiment, it further includes an ultra-low temperature water capture system 3 (prior art) and a water collection tank 4;

[0156] The ultra-low temperature water capture system 3 includes a refrigeration unit, a heat exchanger, an evaporator, and a condenser 31. The vacuum port of the vacuum device 6 is connected to the cavity 21 after passing through the condenser 31 and the evaporator of the ultra-low temperature water capture system 3;

[0157] The water collection tank 4 is divided into an upper water collection chamber 41 and a lower water collection chamber 42. The top of the upper water collection chamber 41 is respectively connected to the condenser 31 and the vacuum tube of the vacuum device 6; the lower water collection chamber 42 is connected to the condenser 31 through a first connecting pipe 43, and a first control valve 44 is provided on the first connecting pipe 43. The first control valve 44 is used to control the on-off of the first connecting pipe 43;

[0158] The bottom of the upper water collection chamber 41 and the top of the lower water collection chamber 42 are connected through a second connecting pipe 45, and a second control valve 46 is provided on the second connecting pipe 45. The second control valve 46 is used to control the on-off of the second connecting pipe 45;

[0159] A liquid level gauge 47 and a second exhaust valve 410 are provided on one side of the lower water collection chamber 42. A drain pump 48 is connected to its bottom. A third control valve 49 is provided between the drain pump 48 and the lower water collection chamber 42. The third control valve 49 is used to control the on-off between the lower water collection chamber and the drain pump 48;

[0160] During operation, both the upper water collection chamber 41 and the lower water collection chamber 42 are in a vacuum state. The first control valve 44 and the second control valve 46 are opened, and the third control valve 49 is closed; the vacuum device 6 extracts water vapor from the cavity 21 and condenses and liquefies it through the condenser 31. The liquefied water flows into the upper water collection chamber 41 and enters the lower water collection chamber 42 through the second connecting pipe 45; when the liquid level gauge 47 detects that the water in the lower water collection chamber 42 reaches a predetermined position, the first control valve 44 and the second control valve 46 are closed, and the second exhaust valve 410 is opened. When the pressure in the lower water collection chamber 42 returns to normal, the third control valve 49 is opened, and the drain pump 48 discharges the water in the lower water collection chamber 42; then the third control valve 49 is closed, the first control valve 44 is opened, after the lower water collection chamber 42 returns to the vacuum state, the second control valve 46 is opened, and the water in the upper water collection chamber 41 continues to flow into the lower water collection chamber 42 due to gravity.

[0161] Working principle: First, close the sealing door 26, and evacuate the first evaporation tank 13 and the cavity 21 to a vacuum state; then, put the liquid product into the raw material tank 11, then enter the first microwave heating tank 12 for microwave heating, and then enter the first evaporation tank 13 under vacuum through the spherical distributor 131 to achieve flash evaporation; when the liquid product reaches a predetermined concentration, it enters the cavity 21 through the feeding device 28 and is evenly arranged on the corresponding conveyor belt 223, is dried on the conveyor belt 223 and then cooled by the cooling plate, and then enters the first screw conveyor 293 for output, is crushed by the hammer mill 294 and then enters the second storage tank 297, and then enters the packaging device 5 from the second storage tank 297 for packing.

[0162] As described above, with reference to Figures 1 - 28 the microwave vacuum low-temperature liquid continuous belt dryer according to the embodiment of the present invention has been described. It has a high degree of automation, high efficiency, and can operate continuously for a long time.

[0163] It should be noted that in this specification, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, the elements defined by the statement "comprising..." do not exclude the presence of additional identical elements in the process, method, article or device including the elements.

[0164] Although the content of the present invention has been described in detail through the above preferred embodiments, it should be recognized that the above description should not be considered as a limitation of the present invention. After those skilled in the art have read the above content, various modifications and substitutions to the present invention will be obvious. Therefore, the protection scope of the present invention should be defined by the appended claims.

Claims

1. A microwave vacuum low-temperature liquid continuous belt dryer, characterized in that, Comprising: A concentration device, through which the liquid product undergoes preliminary evaporation; A main machine device, which includes a cavity and several belt conveying modules; several groups of first microwave generators are arranged on the cavity, and the several groups of first microwave generators respectively match the several belt conveying modules; A feeding device, which is respectively connected to the concentration device and the several belt conveying modules, and can evenly distribute the liquid product in the concentration device on the several belt conveying modules; An aggregate device, which is connected to the several belt conveying modules and can collect and crush the dried product; A packaging device, which is connected to the aggregate device and can pack the crushed product; A vacuum device, the vacuum port of which is respectively connected to the top and both sides of the cavity through multiple groups of vacuum tubes; A cold water device, the cooling water pipe of which is connected to the first microwave generator, and the cold water device is used to cool the first microwave generator and its microwave power supply.

2. The microwave vacuum low-temperature liquid continuous belt dryer according to claim 1, characterized in that, The concentration device includes: a raw material tank, at least one first microwave heating tank and at least one first evaporation tank; The raw material tank is used to hold the liquid product; A first support frame is arranged in the first microwave heating tank, a first coiled pipe is wound around the first support frame from bottom to top, the first coiled pipe is connected to the raw material tank, and the liquid product in the raw material tank can enter the first coiled pipe through a delivery pump; Several second microwave generators are arranged on the first microwave heating tank; A spherical distributor is arranged in the first evaporation tank, several first nozzles are arranged on the spherical distributor, and the spherical distributor is connected to the first coiled pipe; the first evaporation tank is connected to an external vacuum device through a vacuum tube; a discharge port is arranged at the bottom of the first evaporation tank, and the preliminarily evaporated liquid product can return to the raw material tank through a pipeline from the discharge port or enter the next process; and / or The first microwave heating tank and the first evaporation tank are arranged alternately.

3. The microwave vacuum low-temperature liquid continuous belt dryer according to claim 1, characterized in that The main machine device further includes: a cleaning module, a detection module, a pair of sealing doors and a pair of first driving modules; The cleaning module includes a water storage tank and several groups of cleaning nozzles, the water storage tank is connected to the several groups of cleaning nozzles through a water pipe, and the water in the water storage tank can be conveyed to the several groups of cleaning nozzles through a water pump; nozzle fixing parts that can be threadedly connected to the cleaning nozzles are arranged on the cavity, and the cleaning nozzles are fixed inside the cavity through the nozzle fixing parts; The detection module includes several pressure sensors, several temperature sensors, several cameras, several explosion-proof lights and several first exhaust valves; the several pressure sensors and the several first exhaust valves are respectively arranged on the top of the cavity; the several temperature sensors and the several explosion-proof lights are respectively arranged on the top and both sides of the cavity; the several cameras are respectively arranged on the sealing doors and are arranged in sequence from top to bottom along the sealing doors; The pair of sealing doors are arranged at both ends of the cavity and are used to seal the cavity; the sealing doors are of a double-layer structure, and heat-insulating cotton is arranged between the double-layer doors; The pair of first drive modules are connected to the pair of sealing doors in a one-to-one correspondence, and can drive the opening and closing of the sealing doors.

4. The microwave vacuum low-temperature liquid continuous belt dryer according to claim 3, characterized in that, The first drive module includes: a first fixing frame, a first drive motor, a first drive shaft, a pair of first chains, and a pair of second fixing frames; The first drive motor is connected to the first drive shaft and can drive the first drive shaft to rotate; The pair of first chains are arranged at both ends of the first drive shaft, and the first drive shaft can drive the pair of first chains to move; Both sides of the sealing door are slidably connected to the pair of second fixing frames through first guide rails. A number of first drive cylinders are arranged on the second fixing frames, and the output ends of the first drive cylinders are connected to the sealing door to drive the sealing door to move back and forth; A pair of second guide rails and a pair of third guide rails are arranged on the first fixing frame, and the second guide rails are V-shaped; A number of first pulleys, anti-falling devices, a pair of elastic tension rods, and a pair of first position sensors are arranged on the second fixing frames; The number of first pulleys are slidably connected to the second guide rails, and V-shaped grooves are arranged on the first pulleys; The anti-falling device is slidably connected to the third guide rail and is used for the emergency braking of the sealing door; The pair of elastic tension rods are respectively connected to both ends of the first chain; The pair of first position sensors correspond to the pair of elastic tension rods one by one and are used to detect the positions of the pair of elastic tension rods.

5. The microwave vacuum low-temperature liquid continuous belt dryer according to claim 1, characterized in that, The belt conveying module includes: a third fixing frame, a second drive motor, a conveying belt, a driving roller, and a driven roller; The output end of the second drive motor is connected to the driving roller; the conveying belt is respectively connected to the driving roller and the driven roller; the driving roller and the driven roller are respectively arranged at both ends of the third fixing frame; A pair of first limiting strips are arranged at the upper end of the conveying belt, and a pair of second limiting strips are arranged at the lower end thereof. The first limiting strips and the second limiting strips are of the same length as the conveying belt; First annular grooves coupled with the second limiting strips are arranged on the driving roller and the driven roller.

6. The microwave vacuum low-temperature liquid continuous belt dryer according to claim 5, wherein The belt conveying module further includes: a number of first supporting rollers, a pair of first adjusting rollers, a second adjusting roller, a number of first supporting plates, a cooling plate, and a scraper; The number of first supporting rollers are respectively connected to the third fixing frame and are arranged below the conveying belt. The tops of the first supporting rollers are placed between the pair of first limiting strips; The pair of first adjusting rollers are respectively connected to the third fixing frame and are arranged between the upper and lower layers of the conveying belt. The bottoms of the first adjusting rollers are placed between the pair of second limiting strips; The second adjusting roller is located below the conveying belt and is arranged between the pair of first adjusting rollers. Its top is located between the pair of first limiting strips, and its two ends are respectively connected to the third fixing frame through a pair of first adjusting bolts. The first adjusting bolts can adjust the up and down positions of the second adjusting roller; A number of first supporting plates are sequentially arranged below the upper-layer conveying belt and are located between the pair of second limiting strips of the upper-layer conveying belt, playing a role in supporting and limiting the conveying belt; A number of first water leakage holes are arranged on the first supporting plates; The cooling plate is arranged adjacent to the first support plate, is disposed below the output end of the conveyor belt, and is connected to an external cooling device; Both ends of the scraper are connected to the third fixing frame, are arranged at the output end of the conveyor belt, and are used to separate the dried product from the conveyor belt.

7. The microwave vacuum low-temperature liquid continuous belt dryer according to claim 1, characterized in that, The cloth feeding device includes: a first storage tank, a first rotor pump, a plurality of first screw pumps, a cloth feeding frame, and a cloth feeding drive motor; The first storage tank is connected to the concentration device and is used to store the concentrated liquid product; The first rotor pump is respectively connected to the first storage tank and the plurality of first screw pumps, and conveys the liquid product to the plurality of first screw pumps through a pipeline; The cloth feeding drive motor is arranged on the top of the cavity, and its output end is connected to the cloth feeding frame, and can drive the cloth feeding frame to swing reciprocally; The cloth feeding frame is arranged at the input end of the belt conveying module, and is provided with a plurality of swing rods, and cloth spraying nozzles are arranged on the swing rods, and the plurality of swing rods respectively correspond to the plurality of belt conveying modules; The plurality of first screw pumps are respectively connected to the cloth spraying nozzles on the plurality of swing rods through pipelines.

8. The microwave vacuum low-temperature liquid continuous belt dryer according to claim 1, characterized in that, The aggregate device includes: a first driving mechanism, a crushing frame, a first screw conveyor, a hammer mill, a second screw conveyor, a pneumatic butterfly valve, a first air lock, and a second storage tank; The first driving mechanism is arranged on the top of the cavity, and its output end is connected to the crushing frame, and can drive the crushing frame to move up and down; The crushing frame is arranged at the output end of the belt conveying module and includes a plurality of crushing plates, and the plurality of crushing plates correspond to the plurality of belt conveying modules one by one; The first screw conveyor is arranged below the crushing frame and is connected to the output end of the belt conveying module, and is used to convey the dried product out of the cavity; The hammer mill is connected to the first screw conveyor and is used to crush the product; the motor of the hammer mill and the crushing chamber are sealed by a magneto-rheological fluid sealing structure; A pneumatic butterfly valve, the second screw conveyor is connected to the first air lock through the pneumatic butterfly valve; One end of the second screw conveyor is connected to the hammer mill, and the other end is connected to the second storage tank through the first air lock, and is used to convey the crushed product into the second storage tank.

9. The microwave vacuum low-temperature liquid continuous belt dryer according to claim 1, characterized in that It further includes an ultra-low temperature water capture system and a water collection tank; The ultra-low temperature water capture system includes a refrigeration unit, a heat exchanger, an evaporator, and a condenser. The vacuum port of the vacuum device is connected to the cavity after passing through the condenser and the evaporator of the ultra-low temperature water capture system; The water collection tank is divided into an upper water collection chamber and a lower water collection chamber. The top of the upper water collection chamber is respectively connected to the condenser and the vacuum tube of the vacuum device; the lower water collection chamber is connected to the condenser through a first connecting pipe, and a first control valve is arranged on the first connecting pipe; The bottom of the upper water collection chamber and the top of the lower water collection chamber are connected through a second connecting pipe, and a second control valve is arranged on the second connecting pipe; A liquid level gauge and a second exhaust valve are arranged on one side of the lower water collecting cavity, and a drain pump is connected to the bottom thereof. A third control valve is arranged between the drain pump and the lower water collecting cavity.

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