A microwave spiral concentrator

Abstract

The invention discloses a microwave spiral concentrator, comprising a liquid inlet system, a fan-shaped microwave oven cavity, a microwave energy feeding system, a spotlight, an infrared temperature measurement, a radar level gauge, an observation port, a vacuum gauge, a thermal resistance thermometer, a vacuum pipeline system, a maintenance manhole, a polytetrafluoroethylene screw conveyor, a patch resistor, a switching power supply system, a cooling water system, an external insulation system, a shield system, a stair platform system, a control system, and a weighing system. The invention provides a microwave spiral concentrator, which has a low concentrating temperature and high efficiency, and is particularly suitable for liquids with low concentrations that need to be separated and purified, and can provide high-quality materials for subsequent production.

Description

Technical Field

[0001] The present invention relates to the technical field of concentrating devices, and in particular to a microwave spiral concentrating device. Background Art

[0002] Drying is a relatively old traditional process. For solid materials with low moisture content, there are many equipments available. However, for concentrated drying of fluid materials, especially for rapid concentrated drying that does not allow changes in material properties, the technology is immature.

[0003] Microwaves are a highly efficient energy source, known as "the second flame of mankind". Because water is a highly polar molecule and has a strong ability to absorb microwaves, the application of microwave drying and dehydration equipment has developed rapidly in recent years. Microwaves change the random distribution of polar molecules inside the material into an orderly arrangement, and continuously move and rub against each other to generate heat, thereby raising the temperature of the material from the inside. Therefore, microwave heating is fast, uniform, energy-saving, efficient, clean and hygienic.

[0004] At present, the existing concentration devices have complex structures, are inconvenient to use, have low control accuracy, cannot effectively reduce the boiling point of the liquid, are prone to changing the properties of the material during the concentration process, have relatively low product quality, and consume relatively much energy. Summary of the invention

[0005] In response to the problems in the related art, the present invention proposes a microwave spiral concentrator to solve the problems of the existing concentrators, such as complex structure, inconvenient use, low control accuracy, inability to effectively reduce the boiling point of the liquid, easy change of material properties during the concentration process, relatively low product quality, and relatively high energy consumption.

[0006] In order to achieve the above technical objectives, the technical solution of the present invention is as follows:

[0007] A microwave spiral concentrating device is designed, comprising a fan-shaped microwave oven cavity, wherein a vacuum pipeline system and a maintenance manhole are respectively arranged on both sides of the fan-shaped microwave oven cavity, a thermal resistor thermometer is fixedly arranged on the front plate of the fan-shaped microwave oven cavity, a vacuum gauge is connected to the front plate of the fan-shaped microwave oven cavity, a polytetrafluoroethylene screw conveyor is arranged at the bottom of the fan-shaped microwave oven cavity, chip resistors are arranged on the bottom shells of the fan-shaped microwave oven cavity and the polytetrafluoroethylene screw conveyor, a microwave energy feeding system is connected to the entrance of the fan-shaped microwave oven cavity, legs are arranged on the four corners of the bottom of the fan-shaped microwave oven cavity, the four legs are arranged on a weighing system, the weighing system is connected to a stair platform system, the stair platform system is connected to a switching power supply system, the weighing system is also connected to a control system, the control system is connected to a radar level gauge, the control system is also connected to a pump, and the pump is connected to the fan-shaped microwave oven cavity.

[0008] Furthermore, the cooling water system includes a chiller, which is connected to a cooling water inlet pipe and a return pipe. A number of inlet ball valves are evenly arranged on the cooling water inlet pipe, and a pressure gauge is arranged on the inlet ball valve; a number of return ball valves are evenly arranged on the return pipe, and the pressure gauge is arranged at the end of the cooling water inlet pipe.

[0009] Furthermore, the polytetrafluoroethylene screw conveyor is connected to a cycloidal pinwheel reducer, and a chain is arranged between the polytetrafluoroethylene screw conveyor and the cycloidal pinwheel reducer.

[0010] Furthermore, an adjusting screw is provided between the cycloid pinwheel reducer and the chain.

[0011] Furthermore, the microwave energy feeding system includes a magnetron, and the magnetron is arranged on an energy feeding flange, and the energy feeding flange is arranged on the furnace body.

[0012] Furthermore, a slot is provided on the energy feedback flange, and a polytetrafluoroethylene blind plate is provided in the slot.

[0013] Furthermore, the vacuum pipeline system includes a water ring vacuum pump, and the water ring vacuum pump is arranged on a bracket, and the bracket is fixed on the ground.

[0014] Furthermore, a vacuum bellows is provided at the inlet of the water ring vacuum pump, and a vacuum baffle valve is connected between the water ring vacuum pump and the vacuum bellows.

[0015] Furthermore, quick-release flanges are provided between the water ring vacuum pump and the vacuum baffle valve and between the vacuum baffle valve and the vacuum bellows.

[0016] Furthermore, a spotlight, an infrared temperature measurement port and an observation port are fixedly provided on the top of the fan-shaped microwave oven cavity. The same sealing structure is adopted between the spotlight, the observation port and the fan-shaped microwave oven cavity. The sealing structure adopts quartz glass, and the quartz glass is connected with an O-ring and a fluororubber pad.

[0017] Beneficial effects of the invention: The microwave spiral concentrator has a simple structure and is easy to use. It uses microwave heating technology under a vacuum state to reduce the boiling point of the liquid, can accurately control the concentration temperature and concentration rate, and does not change the properties of the material, thereby improving product quality and reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 is a schematic structural diagram of a microwave spiral concentrator according to an embodiment of the present invention;

[0020] Figure 2 is a front view of a microwave spiral concentrator according to an embodiment of the present invention;

[0021] Figure 3 is a top view of a microwave spiral concentrator according to an embodiment of the present invention;

[0022] Figure 4 Schematic diagram of the local structure of a microwave spiral concentrator according to an embodiment of the present invention Figure 1 ;

[0023] Figure 5 yes Figure 1 Schematic diagram of the control system structure;

[0024] Figure 6 yes Figure 1 Schematic diagram of the local structure of the cooling water system Figure 1 ;

[0025] Figure 7 yes Figure 1 Schematic diagram of the local structure of the cooling water system Figure 2 ;

[0026] Figure 8 Schematic diagram of the local structure of a microwave spiral concentrator according to an embodiment of the present invention Figure 2 ;

[0027] Fig. 9 yes Figure 1 Schematic diagram of the structure of the medium vacuum pipeline system;

[0028] In the figure: 1. Liquid inlet system; 2. Fan-shaped microwave oven cavity; 3. Microwave energy feeding system; 4. Spotlight; 5. Infrared temperature measurement; 6. Radar level gauge; 7. Observation port; 8. Vacuum gauge 1; 9. Thermal resistance thermometer; 10. Vacuum pipe system; 11. Maintenance manhole; 12. Polytetrafluoroethylene screw conveyor; 13. Chip resistor; 14. Switching power supply system; 15. Cooling water system; 16. External insulation system; 17. Shield system; 18. Stair platform system; 19. Control system; 20. Weighing system; 101. Chiller; 102. Water inlet ball valve; 103, cooling water inlet pipe; 104, pressure gauge; 105, return pipe; 106, return ball valve; 201, magnetron; 202, cycloid pinwheel reducer; 203, chain; 204, adjusting screw; 205, energy feeding flange; 206, polytetrafluoroethylene blind plate; 207, vacuum gauge 2; 208, furnace chamber arc top plate; 209, O-ring; 210, quartz glass; 211, fluororubber pad; 301, water ring vacuum pump; 302, vacuum baffle valve; 303, quick release flange; 304, vacuum bellows; 305, bracket. DETAILED DESCRIPTION

[0029] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0030] like Figure 1 As shown, a microwave spiral concentrator according to an embodiment of the present invention comprises a fan-shaped microwave oven cavity 2, a vacuum pipeline system 10 and a maintenance manhole 11 are respectively arranged on both sides of the fan-shaped microwave oven cavity 2, a thermal resistor thermometer 9 is fixedly arranged on the front plate of the fan-shaped microwave oven cavity 2, a vacuum gauge 8 is connected to the front plate of the fan-shaped microwave oven cavity 2, a polytetrafluoroethylene screw conveyor 12 is arranged at the bottom of the fan-shaped microwave oven cavity 2, and patches are arranged on the bottom shells of the fan-shaped microwave oven cavity 2 and the polytetrafluoroethylene screw conveyor 12 Resistor 13, a microwave energy feeding system 3 is connected to the entrance of the fan-shaped microwave oven cavity 2, legs are arranged at the four corners of the bottom of the fan-shaped microwave oven cavity 2, the four legs are arranged on a weighing system 20, the weighing system 20 is connected to a stair platform system 18, the stair platform system 18 is connected to a switching power supply system 14, the weighing system 20 is also connected to a control system 19, the control system 19 is connected to a radar level meter 6, the control system 19 is also connected to a pump, and the pump is connected to the fan-shaped microwave oven cavity 2.

[0031] like Figure 1 , 6As shown in Figure 7, in this embodiment, the cooling water system 15 includes a chiller 101, and the chiller 101 is connected to a cooling water inlet pipe 103 and a return pipe 105. A plurality of inlet ball valves 102 are evenly arranged on the cooling water inlet pipe 103, and a pressure gauge 104 is arranged on the inlet ball valve 102; a plurality of return ball valves 106 are evenly arranged on the return pipe 105, and the pressure gauge 104 is arranged at the end of the cooling water inlet pipe 103.

[0032] like Figure 1 , 8 As shown, in this embodiment, the polytetrafluoroethylene screw conveyor 12 is connected to a cycloidal pinwheel reducer 202 , and a chain 203 is provided between the polytetrafluoroethylene screw conveyor 12 and the cycloidal pinwheel reducer 202 .

[0033] like Figure 1 , 8 As shown, in this embodiment, an adjusting screw 204 is provided between the cycloid pinwheel reducer 202 and the chain 203 .

[0034] like Figure 1 , 8 As shown, in this embodiment, the microwave energy feeding system 3 includes a magnetron 201, and the magnetron 201 is arranged on an energy feeding flange 205, and the energy feeding flange 205 is arranged on the furnace body.

[0035] like Figure 1 , 8 As shown, in this embodiment, a slot is provided on the energy feeding flange 205 , and a polytetrafluoroethylene blind plate 206 is provided in the slot.

[0036] like Figure 1 , 9 As shown, in this embodiment, the vacuum pipeline system 10 includes a water ring vacuum pump 301, and the water ring vacuum pump 301 is arranged on a bracket 305, and the bracket 305 is fixed on the ground.

[0037] like Figure 1 , 9 As shown, in this embodiment, a vacuum bellows 304 is provided at the inlet of the water ring vacuum pump 301 , and a vacuum baffle valve 302 is connected between the water ring vacuum pump 301 and the vacuum bellows 304 .

[0038] like Figure 1 , 9 As shown, in this embodiment, quick-release flanges 303 are provided between the water ring vacuum pump 301 and the vacuum baffle valve 302 and between the vacuum baffle valve 302 and the vacuum bellows 304 .

[0039] like Figure 1 , 8 As shown, in this embodiment, a spotlight 4, an infrared temperature measuring device 5, and an observation port 7 are also fixedly provided on the top of the fan-shaped microwave oven cavity 2. The same sealing structure is adopted between the spotlight 4, the observation port 7 and the fan-shaped microwave oven cavity 2. The sealing structure adopts quartz glass 210. The quartz glass 210 is connected with an O-ring 209 and a fluororubber pad 211.

[0040] like Figure 1 , 8 As shown, in this embodiment, the fan-shaped microwave oven cavity 2 is provided with a cavity arc top plate 208, and the radar level meter 6 is arranged in the middle of the cavity arc top plate 208, and a steel pipe 212 with a balancing hole is extended into the bottom of the furnace body, which can effectively reduce the interference of microwaves on the radar level meter 6 and reduce the liquid level distortion caused by liquid boiling.

[0041] like Figure 1-8 As shown, in this embodiment, the microwave power transformer of the microwave source is 380V and adopts a triangle connection method, which can eliminate the potential difference between the neutral line and the ground line.

[0042] like Figure 1-8 As shown, in this embodiment, the power supply of the microwave control system and the power supply of the switching power supply of the microwave source are separated by an isolation transformer, and the control line and the motor cable are respectively routed through the cable tray, making the microwave control system more stable.

[0043] like Figure 1-8 As shown, the vacuum regulator 1 8 and the vacuum regulator 2 207 have the same specifications.

[0044] To facilitate further understanding of the above technical solution, its structural working principle is now explained:

[0045] like Figure 1-9As shown, the microwave spiral concentrator consists of a liquid inlet system 1, a fan-shaped microwave oven cavity 2, a microwave energy feeding system 3, a spotlight 4, an infrared temperature measurement 5, a radar level meter 6, an observation port 7, a vacuum gauge 8, a thermal resistance thermometer 9, a vacuum pipeline system 10, a maintenance manhole 11, a polytetrafluoroethylene screw conveyor 12, a chip resistor 13, a switching power supply system 14, a cooling water system 15, an external insulation system 16, a protective cover system 17, a stair platform system 18, a control system 19, and a weighing system 20. The microwave energy feeding system 3, the spotlight 4, the infrared temperature measurement 5, the radar level meter 6, and the observation port 7 are installed on the top of the fan-shaped microwave oven cavity 2, the vacuum gauge 8, the thermal resistance thermometer 9, are installed on the front plate of the fan-shaped microwave oven cavity 2, the vacuum pipeline system 10, and the manhole 11 for maintenance are installed on both sides of the fan-shaped microwave oven cavity 2, the polytetrafluoroethylene screw conveyor 12 is at the bottom of the fan-shaped microwave oven cavity 2, and the chip resistor 13 is installed on the bottom shell. The fan-shaped microwave oven cavity 2 is placed on the weighing system 20 by four legs; the weighing system 20 is placed on the stair platform system 18; the switching power supply system 14 is placed on the stair platform system 18; the microwave energy feeding system 3 is installed on the microwave feeding port of the fan-shaped microwave oven cavity 2; the sealing system adopts O-ring and polytetrafluoroethylene sealing gasket.

[0046] When in use, first start the chiller 101, adjust the opening of the magnetron 201, the cooling water inlet pipe 103, the water inlet ball valve 102, the return pipe 105, and the ball valve 106, observe the pressure gauge 104 at the end of the inlet pipe 103, and after the display value of the pressure gauge 104 at the end is stable, proceed to the next step. Pump the fluid material into the sector-shaped microwave oven cavity 2, and the liquid level change of the radar level gauge 6 and the weight change of the weighing system 20 can be observed on the touch screen of the control system 19. After the appropriate material is obtained, stop the operation of the liquid inlet pump. Turn on the transmission system, the polytetrafluoroethylene screw conveyor 12 is driven by the cycloidal pinwheel reducer 202 through the chain 203, and the cycloidal pinwheel reducer 202 uses the adjusting screw 204 to realize the tension and relaxation of the chain 203; the polytetrafluoroethylene screw conveyor 12 conveyor runs alternately in forward and reverse directions, disturbing the fluid material to fully absorb microwaves, and the concentration and drying effect is more obvious. The magnetron 201 of the microwave energy feeding system 3 is turned on. The magnetron 201 is mounted on the energy feeding flange 205 on the furnace body. The flange has an inner groove and a polytetrafluoroethylene blind plate 206 that can be used for conventional microwaves is embedded to seal the vacuum. The vacuum pipeline system 10 is turned on. The system includes a water ring vacuum pump 301 mounted on a bracket 305. The bracket 305 is fixed on the ground. The water ring vacuum pump 301 has a vacuum baffle valve 302 and a vacuum bellows 304 at the inlet. The vacuum bellows 304 is connected to the fan-shaped microwave oven cavity 2. Each connection uses a quick-release flange 303 with a sealing ring. The pressure of the fan-shaped microwave oven cavity 2 is observed through the vacuum gauge 207. It is normally set to 30000Pa. The speed of the water ring vacuum pump 301 is adjusted by the frequency converter to control the pressure of the fan-shaped microwave oven cavity 2. At about 30000Pa, the boiling point of water is about 70°C. The solution absorbs microwaves and quickly heats up and boils, and the water evaporates quickly to achieve the effect of concentration and drying. Turn on the lighting device of the spotlight 4. When the spotlight 4 is installed, a small hole is opened in the arc-shaped top plate 208 of the furnace cavity to suppress microwaves and transmit light, and the operating status can be directly observed through the observation port 7; the sealing structure type of the installation of the spotlight 4 is similar to that of the observation port 7, which is composed of an O-ring 209, a quartz glass 210, and a fluororubber pad 211. The radar level meter is installed in the middle of the arc-shaped top plate 208 of the furnace cavity of the fan-shaped microwave oven cavity 2, and a steel pipe 212 with a small balancing hole is extended into the bottom of the furnace body, which effectively reduces the interference of microwaves on the radar level meter and reduces the distortion of the liquid level caused by the boiling of the liquid. During the operation, the values ​​of temperature, liquid level, weight, vacuum degree, etc. are calculated and corrected to ensure the smooth progress of concentration and drying, and effectively avoid "dry burning" to damage equipment and material denaturation.

[0047] In the description of the present invention, it is necessary to understand that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0048] In the present invention, unless otherwise clearly stipulated and limited, for example, it can be a fixed connection, a detachable connection, or an integrated one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A microwave spiral concentrator, comprising a sector-shaped microwave oven cavity (2), characterized in that: A vacuum pipeline system (10) and a maintenance manhole (11) are respectively arranged on both sides of the fan-shaped microwave oven cavity (2); a thermal resistance thermometer (9) is fixedly arranged on the front plate of the fan-shaped microwave oven cavity (2); a vacuum gauge (8) is connected to the front plate of the fan-shaped microwave oven cavity (2); a polytetrafluoroethylene screw conveyor (12) is arranged at the bottom of the fan-shaped microwave oven cavity (2); chip resistors (13) are arranged on the bottom shells of the fan-shaped microwave oven cavity (2) and the polytetrafluoroethylene screw conveyor (12); a microwave energy feeding system (3) is connected to the entrance of the fan-shaped microwave oven cavity (12); legs are arranged at the four corners of the bottom of the fan-shaped microwave oven cavity (2); the four legs are arranged on a weighing system (20); the weighing system (20) is connected to a stair platform system (18); the stair platform system (18) is connected to a switch power supply system (14); the weighing system (2 0) is also connected to a control system (19), the control system (19) is connected to a radar level meter (6), the control system (19) is also connected to a pump, the pump is connected to the sector-shaped microwave oven cavity (2); the cooling water system (15) comprises a chiller (101), the chiller (101) is connected to a cooling water inlet pipe (103) and a return pipe (105), a plurality of inlet ball valves (102) are evenly arranged on the cooling water inlet pipe (103), a pressure gauge (104) is arranged on the inlet ball valve (102); a plurality of return ball valves (106) are evenly arranged on the return pipe (105), the pressure gauge (104) is arranged at the end of the cooling water inlet pipe (103); the microwave energy feeding system (3) comprises a magnetron (201), the magnetron (201) is arranged on an energy feeding flange (205), and the energy feeding flange (205) is arranged on the furnace body.

2. A microwave spiral concentrator according to claim 1, characterized in that: The polytetrafluoroethylene screw conveyor (12) is connected to a cycloidal pinwheel reducer (202), and a chain (203) is provided between the polytetrafluoroethylene screw conveyor (12) and the cycloidal pinwheel reducer (202).

3. A microwave spiral concentrator according to claim 2, characterized in that: An adjusting screw (204) is provided between the cycloid pinwheel reducer (202) and the chain (203).

4. The microwave spiral concentrator according to claim 1, characterized in that: The energy feedback flange (205) is provided with a slot, and a polytetrafluoroethylene blind plate (206) is provided in the slot.

5. The microwave spiral concentrator according to claim 1, characterized in that: The vacuum pipeline system (10) comprises a water ring vacuum pump (301), wherein the water ring vacuum pump (301) is arranged on a bracket (305), and the bracket (305) is fixed on the ground.

6. The microwave spiral concentrator according to claim 5, characterized in that: A vacuum bellows (304) is provided at the inlet of the water ring vacuum pump (301), and a vacuum baffle valve (302) is connected between the water ring vacuum pump (301) and the vacuum bellows (304).

7. The microwave spiral concentrator according to claim 6, characterized in that: A quick-release flange (303) is provided between the water ring vacuum pump (301) and the vacuum baffle valve (302), and between the vacuum baffle valve (302) and the vacuum bellows (304).

8. The microwave spiral concentrator according to claim 1, characterized in that: A spotlight (4), an infrared temperature measurement (5), and an observation port (7) are also fixedly provided on the top of the fan-shaped microwave oven cavity (2); the spotlight (4), the observation port (7), and the fan-shaped microwave oven cavity (2) all have the same sealing structure; the sealing structure uses quartz glass (210); the quartz glass (210) is connected to an O-ring (209) and a fluororubber pad (211).

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