Closed cycle extraction equipment

Abstract

The invention relates to the technical field of solvent extraction equipment, in particular to closed-loop circulation extraction equipment which comprises a top cover, a tank body, an extraction tank and a conical cover, a flow choking cover is fixedly mounted at the position, close to the bottom, of the inner wall of the tank body, and the flow choking cover is of a conical structure with a round hole in the center; and the top diameter of the choke cover is smaller than the bottom diameter. A first heat conduction seat and a second heat conduction seat are mounted in the extraction tank, and grooves in the first heat conduction seat and the second heat conduction seat are combined to form an inverted-cone-shaped storage space, so that after a solvent circularly enters the extraction tank, heat applied by an electric hot tray is transferred through the first heat conduction seat, and the solvent and the second heat conduction seat are heated; and through overall rotation of the extraction tank, part of the solvent close to the liquid level is thrown to the surface of the second heat conduction seat by centrifugal force, so that the solvent is rapidly gasified on the inner wall of the second heat conduction seat, and the extraction efficiency of the solvent is improved.

Description

Technical Field

[0001] The invention relates to the technical field of solvent extraction equipment, in particular to closed-circuit extraction equipment. Background Art

[0002] Closed-loop extraction equipment is a technical device widely used in industry and scientific research. It is mainly used to separate target components from complex mixtures. Based on the difference in solubility of substances in different solvents, the equipment recycles the extractant through continuous extraction and back-extraction processes to achieve an efficient and environmentally friendly separation process, so that the target substance can be purified and concentrated. In order to improve the practicality of closed-loop extraction equipment, we propose a closed-loop extraction equipment.

[0003] The prior art also has the following defects during use: The closed-loop extraction equipment in the prior art does not have an ideal distillation and extraction efficiency for the solvent when extracting the solvent. The vaporization rate of the solvent inside the equipment is limited by the area of ​​the container inside the equipment, which leads to the limitations of the traditional closed-loop solvent extraction equipment. During the operation of the closed-loop extraction equipment in the prior art, the solvent needs to spend a lot of time being heated during the extraction process, so that some components of the solvent are heated and vaporized before condensation extraction, which requires a lot of time to pre-treat the solvent. In addition, since the solvent is not heated evenly inside the equipment, it is very easy to cause part of the solvent at the bottom to be overheated and stick to the bottom.

[0004] In view of this, we propose a closed-loop extraction device to solve the existing problems. Summary of the invention

[0005] The object of the present invention is to provide a closed-circuit extraction device to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a closed-circuit extraction device, comprising a top cover, a tank body, an extraction tank and a conical cover, wherein a spoiler is fixedly installed at a position near the bottom of the inner wall of the tank body, the spoiler is a conical structure with a circular hole in the center, and the top diameter of the spoiler is smaller than the bottom diameter, a drainage hole is opened on the side wall of the tank body at the connection position between the tank body and the outer wall of the spoiler, and a first solenoid valve is fixedly installed on the outer side of the tank body at the position of the drainage hole; A top cover is fixedly installed on the top of the tank body; An extraction tank is rotatably mounted inside the tank body, a plurality of tooth plates are mounted in an annular array at the bottom of the extraction tank, and a plurality of stirring balls are arranged inside the extraction tank, the stirring balls are solid spheres, a first heat-conducting seat is fixedly mounted inside the extraction tank, a drainage groove is provided on one side of the interior of the first heat-conducting seat, a groove with an inverted trapezoidal cross section is provided inside the first heat-conducting seat, a second heat-conducting seat is plugged and mounted on the top of the first heat-conducting seat, a groove with the same slope as that of the groove inside the first heat-conducting seat is provided inside the second heat-conducting seat, and a plurality of protrusions are provided on the inner wall of the second heat-conducting seat; A conical cover is fixedly installed inside the tank body above the extraction tank, a connecting pipe is fixedly installed at the central position of the conical cover, a heat dissipation cover is fixedly installed on the top of the conical cover, and a plurality of heat dissipation fins are fixedly installed on the top of the heat dissipation cover.

[0007] Preferably, an electric heating plate is fixedly installed on the bottom of the extraction tank, a mounting frame is installed on the bottom of the extraction tank through a bearing, and the mounting frame is fixedly connected to the inner wall of the tank body, an electric motor is fixedly installed on the bottom of the mounting frame, and the output shaft of the motor passes through the mounting frame and is fixedly connected to the extraction tank, a second solenoid valve is fixedly installed on one side of the extraction tank, and the second solenoid valve is connected to the drainage trough.

[0008] Preferably, a three-way pipe is fixedly installed at the central position of the top cover, and the bottom end of the three-way pipe extends to the bottom of the top cover.

[0009] Preferably, a circulation pump is fixedly installed on one side of the three-way pipe, a return pipe is fixedly installed on one end of the circulation pump, the end of the return pipe away from the circulation pump is fixedly connected to the first solenoid valve, a vacuum pump is installed on the back of the three-way pipe through a pipeline, and a barometer is fixedly installed on the top of the top cover away from the circulation pump.

[0010] Preferably, a discharge valve is fixedly installed at the bottom of the tank body, and a guide pipe is fixedly installed at the bottom of the discharge valve.

[0011] Preferably, a heat dissipation fan is fixedly mounted on the side wall of the tank body, and the installation position of the heat dissipation fan is higher than the installation position of the heat dissipation cover.

[0012] Preferably, a plurality of brackets are fixedly installed at the bottom of the tank body near the edge, and a bottom plate is fixedly installed at the bottom of the brackets.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The present invention installs a first heat-conducting seat and a second heat-conducting seat inside an extraction tank, and forms an inverted cone-shaped storage space through the combination of grooves inside the first heat-conducting seat and the second heat-conducting seat, so that after the solvent circulates into the extraction tank, the heat applied by the electric heating plate is transferred through the first heat-conducting seat to heat the solvent and the second heat-conducting seat, and then the extraction tank is rotated as a whole, and centrifugal force is used to throw part of the solvent near the liquid surface onto the surface of the second heat-conducting seat, so that the solvent is quickly vaporized on the inner wall of the second heat-conducting seat, thereby improving the extraction efficiency of the solvent.

[0014] The present invention installs a stirring ball inside the extraction tank, and applies thrust to the stirring ball through the rotation of the extraction tank, so that the stirring ball moves irregularly inside the extraction tank, thereby stirring the solvent inside the extraction tank, so that the solvent is heated evenly. At the same time, the stirring ball can promote the mixing of the solvent circulating into the extraction tank and the unvaporized solvent, thereby avoiding stratification inside the extraction tank that affects the subsequent use effect of the solvent. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a front structural schematic diagram of the present invention; Figure 3 It is a partial front cross-sectional structural schematic diagram of the present invention; Figure 4 It is a schematic diagram of a partial three-dimensional structure of the present invention; Figure 5 It is a schematic diagram of the three-dimensional cross-sectional structure of the extraction tank of the present invention.

[0016] In the figure: 1, top cover; 101, vacuum pump; 102, circulation pump; 103, barometer; 104, three-way pipe; 105, reflux pipe; 2, tank body; 201, bracket; 202, discharge valve; 203, first solenoid valve; 204, heat dissipation fan; 205, baffle; 206, drainage hole; 3, extraction tank; 301, first heat-conducting seat; 302, electric heating plate; 303, motor; 304, mounting frame; 305, drainage trough; 306, second solenoid valve; 307, stirring ball; 308, second heat-conducting seat; 4, conical cover; 401, connecting pipe; 402, heat dissipation cover; 403, heat dissipation fins. DETAILED DESCRIPTION

[0017] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0018] like Figure 1 - Figure 5As shown, a closed-loop extraction device proposed by the present invention comprises a top cover 1, a tank body 2, an extraction tank 3 and a conical cover 4, a spoiler 205 is fixedly installed on the inner wall of the tank body 2 near the bottom, the spoiler 205 is a conical structure with a circular hole in the center, and the top diameter of the spoiler 205 is smaller than the bottom diameter, a drainage hole 206 is opened on the side wall of the tank body 2 at the connection position between the tank body 2 and the outer wall of the spoiler 205, and a first solenoid valve 203 is fixedly installed on the outer side of the tank body 2 at the position of the drainage hole 206, the tank body 2 can provide an installation position for the surrounding components, and the spoiler 205 can guide the solvent flowing on the inner wall of the tank body 2, so that the tank body 2 and the spoiler 205 are connected. Cooperate to block the solvent, so that the extracted solvent is precipitated outside the baffle 205, and according to the use requirements, open the first solenoid valve 203 to allow the precipitated solvent to flow back to the inside of the device through the reflux pipe 105, or close the first solenoid valve 203, and take the supernatant of the precipitated solvent out of the device from the discharge valve 202 for use, the discharge hole 206 can make the solvent outside the baffle 205 be discharged from the tank body 2 from the first solenoid valve 203, so that the solvent can be circulated and extracted through the reflux pipe 105, and the first solenoid valve 203 can control the switch of the reflux pipe 105, so as to control the circulation of the solvent inside the reflux pipe 105 according to the use requirements; A top cover 1 is fixedly mounted on the top of the tank body 2. The top cover 1 can provide a location for the surrounding components to be installed, and cooperates with the tank body 2 to provide a closed circulation extraction space for the solvent. An extraction tank 3 is rotatably installed inside the tank body 2, a plurality of teeth are installed in a circular array at the bottom of the extraction tank 3, and a plurality of stirring balls 307 are arranged inside the extraction tank 3, and the stirring balls 307 are solid spheres. A first heat-conducting seat 301 is fixedly installed inside the extraction tank 3, a drainage groove 305 is provided on one side of the interior of the first heat-conducting seat 301, a groove with an inverted trapezoidal cross-section is provided inside the first heat-conducting seat 301, and a second heat-conducting seat 308 is plugged and installed on the top of the first heat-conducting seat 301, a groove with the same slope as the groove inside the first heat-conducting seat 301 is provided inside the second heat-conducting seat 308, and a plurality of protrusions are provided on the inner wall of the second heat-conducting seat 308, the extraction tank 3 can provide storage space for the solvent, so that after the solvent enters the extraction tank 3, it is heated and vaporized, so that the solvent inside The components are extracted, and the stirring ball 307 can be pushed by the teeth inside the extraction tank 3 when the extraction tank 3 rotates, and irregularly moves inside the extraction tank 3, thereby promoting uniform heating and mixing of the solvent, so that the solvent can be efficiently extracted inside the extraction tank 3, and ensure that the recycled solvent has usability. The shell of the stirring ball 307 adopts a spherical structure or a polyhedral structure, and the first heat-conducting seat 301 can absorb the heat emitted by the electric heating plate 302 at the bottom of the extraction tank 3, and then heat the internal solvent and the second heat-conducting seat 308 at the top. The second heat-conducting seat 308 can continuously absorb the heat inside the first heat-conducting seat 301, so that the second heat-conducting seat 308 can contact with the solvent after being heated, so that the solvent is quickly vaporized at the moment of contact with the second heat-conducting seat 308, thereby improving the device's recycling extraction efficiency for the solvent; A conical cover 4 is fixedly installed inside the tank body 2 above the extraction tank 3, a connecting pipe 401 is fixedly installed at the central position of the conical cover 4, a heat dissipation cover 402 is fixedly installed on the top of the conical cover 4, and a plurality of heat dissipation fins 403 are fixedly installed on the top of the heat dissipation cover 402. The conical cover 4 is made of bismuth telluride and its alloy material. Bismuth telluride and its alloy material are a kind of thermoelectric material. After being energized, they can cause a temperature difference to occur in themselves, thereby realizing temperature transfer. By energizing the conical cover 4 to generate a temperature difference, the heat is transferred to the heat dissipation cover 402 and the heat dissipation fins 403, and the heat is blown out by the heat dissipation fan 204. The airflow is discharged from the tank body 2, so that the temperature of the conical cover 4 drops. When the rising solvent gas contacts the conical cover 4, the low temperature can be used to condense and liquefy the solvent at the bottom of the conical cover 4, and the liquefied solvent flows downward along the inner wall of the tank body 2, thereby realizing the extraction of the solvent. The connecting pipe 401 can be connected to the three-way pipe 104, so that the solvent can circulate between the three-way pipe 104, the tank body 2 and the reflux pipe 105. It can also be connected to the vacuum pump 101 through the three-way pipe 104 to extract the air inside the tank body 2, and use the negative pressure environment inside the tank body 2 to reduce the boiling point of the solvent, thereby making it easier for the solvent to vaporize.

[0019] Furthermore, an electric heating plate 302 is fixedly installed at the bottom of the extraction tank 3, a mounting frame 304 is installed at the bottom of the extraction tank 3 through a bearing, and the mounting frame 304 is fixedly connected to the inner wall of the tank body 2, a motor 303 is fixedly installed at the bottom of the mounting frame 304, and the output shaft of the motor 303 passes through the mounting frame 304 and is fixedly connected to the extraction tank 3, a second electromagnetic valve 306 is fixedly installed on one side of the extraction tank 3, and the second electromagnetic valve 306 is connected to the drainage groove 305, and the electric heating plate 302 can emit heat after being energized, thereby heating the extraction tank 3 and its internal components and solvent, thereby promoting the extraction of the solvent. The various components of the part are vaporized in turn at different temperatures, which facilitates the extraction of the solvent. The mounting bracket 304 can provide a mounting position for the surrounding components, thereby ensuring the installation stability of the surrounding components and the stability of the extraction tank 3 during rotation. The motor 303 adopts the YE3-50KW type. The motor 303 can rotate after being energized, and can then drive the extraction tank 3 to rotate. The second solenoid valve 306 can control the switch of the drain trough 305, so that the solvent inside the extraction tank 3 can flow out to the inside of the tank body 2, which can facilitate the large-scale discharge of the solvent inside the extraction tank 3.

[0020] Furthermore, a three-way pipe 104 is fixedly installed at the central position of the top cover 1, and the bottom end of the three-way pipe 104 extends to the bottom of the top cover 1. The three-way pipe 104 can connect the vacuum pump 101, the circulation pump 102 and the tank body 2, so that the solvent and air can flow inside the three-way pipe 104, which is convenient for the solvent to circulate inside the device, and also convenient for the vacuum pump 101 to suck the air inside the tank body 2, thereby generating a negative pressure environment to reduce the boiling point of the solvent, making the solvent easier to vaporize and extract.

[0021] Furthermore, a circulation pump 102 is fixedly installed on one side of the three-way pipe 104, a reflux pipe 105 is fixedly installed on one end of the circulation pump 102, and one end of the reflux pipe 105 away from the circulation pump 102 is fixedly connected to the first solenoid valve 203, a vacuum pump 101 is installed on the back of the three-way pipe 104 through a pipeline, and a barometer 103 is fixedly installed on the top of the top cover 1 away from the circulation pump 102. The circulation pump 102 adopts 125UHB-ZK-JS. After the circulation pump 102 is powered on, it can suck the solvent inside the tank body 2 through the reflux pipe 105, so that the solvent can flow back to the extraction tank 3 , and then the solvent is circulated and extracted inside the device. The vacuum pump 101 adopts the N811KN-18 type. The vacuum pump 101 can suck the air inside the tank body 2 through the three-way pipe 104, so that a negative pressure environment is formed inside the tank body 2. By reducing the air pressure value inside the tank body 2, the boiling point of the solvent is reduced, so that when the device extracts the solvent, the solvent is easier to gasify and extract. The barometer 103 adopts the TE2000 type. The barometer 103 can detect the air pressure value inside the tank body 2, and then cooperate with the vacuum pump 101 to reduce the air pressure value inside the tank body 2 and reduce the boiling point of the solvent.

[0022] Furthermore, a discharge valve 202 is fixedly installed at the bottom of the tank body 2, and a guide pipe is fixedly installed at the bottom of the discharge valve 202. The discharge valve 202 can discharge the solvent from the bottom of the tank body 2, so that after the solvent is precipitated in the baffle 205, the supernatant of the solvent is discharged from the discharge valve 202, and then the solvent is taken.

[0023] Furthermore, a heat dissipation fan 204 is fixedly installed on the side wall of the tank body 2, and the installation position of the heat dissipation fan 204 is higher than the installation position of the heat dissipation cover 402. The heat dissipation fan 204 adopts the FDL-4C type. After the heat dissipation fan 204 is powered on, it can exhaust air from the inside of the tank body 2, so that the air above the heat dissipation cover 402 continues to flow, thereby cooling the heat dissipation cover 402 and the heat dissipation fins 403.

[0024] Furthermore, a plurality of brackets 201 are fixedly installed at the bottom of the tank body 2 near the edge, and a base plate is fixedly installed at the bottom of the brackets 201. The brackets 201 can cooperate with the base plate to support the tank body 2 to ensure the installation stability of the tank body 2 and its surrounding components.

[0025] Working principle: After the device is assembled and checked and confirmed to be correct, the solvent is injected into the extraction tank 3, and the liquid level of the solvent is at the connection position of the first heat-conducting seat 301 and the second heat-conducting seat 308, the top cover 1 is closed to seal the tank body 2, and the conical cover 4 is energized to make the conical cover 4 continue to absorb the heat from the space below, and transfer the heat to the heat dissipation cover 402 and the heat dissipation fins 403, and the heat dissipation cover 402 and the heat dissipation fins 403 are cooled by the heat dissipation fan 204, so that the heat absorbed by the conical cover 4 The first heat-conducting seat 301 absorbs the heat and heats the solvent. The second heat-conducting seat 308 heats the solvent. The temperature of the second heat-conducting seat 308 rises to above the boiling point of the solvent. At the same time, the motor 303 is turned on to heat the extraction tank 3 and the solvent. The electric rotation drives the extraction tank 3 to rotate back and forth, and the stirring ball 307 moves irregularly inside the extraction tank 3 under the push of the internal teeth of the extraction tank 3, driving the solvent to stir inside the extraction tank 3. At the same time, the solvent near the liquid surface is affected by the centrifugal force and intermittently contacts the inner wall of the second heat-conducting seat 308, and quickly vaporizes and rises on the inner wall of the second heat-conducting seat 308. After the solvent vaporizes, it contacts the conical cover 4, condenses and liquefies on the bottom surface of the conical cover 4, and flows downward along the inner wall of the tank body 2. When the first solenoid valve 203 is closed and the discharge valve 202 is opened, the extracted solvent is precipitated on the outside of the baffle 205. When the solvent level after precipitation is higher than the top of the baffle 205, it flows to the bottom of the tank body 2 through the baffle 205 and is discharged from the tank body 2 through the discharge valve 202. When the first solenoid valve 203 is opened and the discharge valve 202 is closed, the solvent flowing down the inner wall of the tank body 2 passes through the reflux pipe 105 and, under the suction of the circulation pump 102, flows back to the extraction tank 3 for circulation extraction.

[0026] The above-mentioned specific embodiments are only several preferred embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

Claims

1. A closed-circuit extraction device, comprising a top cover (1), a tank body (2), an extraction tank (3) and a conical cover (4), characterized in that: A spoiler (205) is fixedly mounted on the inner wall of the tank body (2) near the bottom, the spoiler (205) is a conical structure with a circular hole at the center, and the top diameter of the spoiler (205) is smaller than the bottom diameter; a drainage hole (206) is provided on the side wall of the tank body (2) at a connection position between the tank body (2) and the outer wall of the spoiler (205), and a first solenoid valve (203) is fixedly mounted on the outer side of the tank body (2) at the position of the drainage hole (206); A top cover (1) is fixedly mounted on the top of the tank body (2); An extraction tank (3) is rotatably mounted inside the tank body (2), a plurality of tooth plates are mounted in an annular array at the bottom of the extraction tank (3), and a plurality of stirring balls (307) are arranged inside the extraction tank (3), wherein the stirring balls (307) are solid spheres, and a first heat-conducting seat (301) is fixedly mounted inside the extraction tank (3), a liquid drainage groove (305) is provided on one side of the interior of the first heat-conducting seat (301), a groove with an inverted trapezoidal cross section is provided inside the first heat-conducting seat (301), and a second heat-conducting seat (308) is plugged and mounted on the top of the first heat-conducting seat (301), a groove with a slope identical to that of the groove inside the first heat-conducting seat (301) is provided inside the second heat-conducting seat (308), and a plurality of protrusions are provided on the inner wall of the second heat-conducting seat (308); A conical cover (4) is fixedly mounted inside the tank body (2) above the extraction tank (3); a connecting pipe (401) is fixedly mounted at the center of the conical cover (4); a heat dissipation cover (402) is fixedly mounted on the top of the conical cover (4); and a plurality of heat dissipation fins (403) are fixedly mounted on the top of the heat dissipation cover (402).

2. A closed-circuit extraction device according to claim 1, characterized in that: An electric heating plate (302) is fixedly mounted on the bottom of the extraction tank (3); a mounting frame (304) is mounted on the bottom of the extraction tank (3) via a bearing, and the mounting frame (304) is fixedly connected to the inner wall of the tank body (2); a motor (303) is fixedly mounted on the bottom of the mounting frame (304), and an output shaft of the motor (303) passes through the mounting frame (304) and is fixedly connected to the extraction tank (3); a second solenoid valve (306) is fixedly mounted on one side of the extraction tank (3), and the second solenoid valve (306) is connected to the drainage groove (305).

3. A closed-circuit extraction device according to claim 1, characterized in that: A three-way pipe (104) is fixedly installed at the central position of the top cover (1), and the bottom end of the three-way pipe (104) extends to the bottom of the top cover (1).

4. A closed-circuit extraction device according to claim 3, characterized in that: A circulation pump (102) is fixedly mounted on one side of the three-way pipe (104); a return pipe (105) is fixedly mounted on one end of the circulation pump (102); an end of the return pipe (105) away from the circulation pump (102) is fixedly connected to a first solenoid valve (203); a vacuum pump (101) is mounted on the back of the three-way pipe (104) via a pipeline; and a barometer (103) is fixedly mounted on the top of the top cover (1) away from the circulation pump (102).

5. A closed-circuit extraction device according to claim 1, characterized in that: A discharge valve (202) is fixedly mounted on the bottom of the tank body (2), and a flow guide pipe is fixedly mounted on the bottom of the discharge valve (202).

6. A closed-circuit extraction device according to claim 1, characterized in that: A heat dissipation fan (204) is fixedly mounted on the side wall of the tank body (2), and the mounting position of the heat dissipation fan (204) is higher than the mounting position of the heat dissipation cover (402).

7. A closed-circuit extraction device according to claim 1, characterized in that: A plurality of brackets (201) are fixedly mounted on the bottom of the tank body (2) near the edge, and a bottom plate is fixedly mounted on the bottom of the brackets (201).

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