Chemical extraction and separation device

Abstract

The invention discloses a chemical extraction and separation device which comprises a mixing tank and a separation pool, an overflow part fixedly communicates between the mixing tank and the separation pool, a transmission groove is formed in the top of the separation pool, a moving mechanism is arranged in the transmission groove, a scraper assembly is slidably connected to the inner wall of the transmission groove, and a mounting block is fixedly connected to one side of the scraper assembly. According to the chemical extraction and separation device, the device is provided with the scraper blade adjusting assembly, the position of a scraper blade is determined by making contact with different capacitance values of a solution, air and floating foam through a probe of a capacitance sensor, the scraper blade only scrapes the floating foam, when the water level of liquid in a separation pool rises, water gives buoyancy to a foam floating plate, and the foam floating plate is separated from the foam floating plate; at the moment, buoyancy drives a balancing weight and a trigger rod to move upwards, the trigger rod abuts against a pressure sensor, under the action of a single-chip microcomputer controller, an electric telescopic rod shrinks, the scraper is heightened, the position of the scraper can be automatically adjusted, and the floating foam gathering effect is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of chemical extraction separation, in particular to a chemical extraction separation device. BACKGROUND

[0002] Chemical industry, as a basic pillar industry of national economy, transforms raw materials into key substances such as energy, new materials, pharmaceutical intermediates and agricultural chemicals through chemical reactions and physical processing, and its product penetration rate reaches more than 90% in modern manufacturing fields. With the upgrading of semiconductor manufacturing, biopharmaceuticals and high-end polymers industries, the purity requirements of basic chemical raw materials have been upgraded from the traditional industrial grade of 99% to the electronic grade of more than 99.999% (5N). The core of the preparation of such ultra-high purity materials is to efficiently remove reaction residues, isomer byproducts and metal ion impurities. Among them, the liquid-liquid extraction separation technology becomes the key process for purification due to its high selectivity and low energy consumption. However, the existing mainstream gravity type extraction separation device faces severe engineering challenges - especially in continuous production, it is difficult to realize dynamic removal of floating foam, which becomes a process bottleneck restricting the breakthrough of product purity.

[0003] The most widely used gravity extraction separation system currently consists of a mixing tank, an overflow conduit and a separation tank as the basic unit: the extraction liquid and the solvent are stirred in the mixing tank by a turbine to form an emulsion, and then introduced into a rectangular separation tank through an overflow weir; natural stratification is realized by relying on the density difference between the two phases, the light phase is collected from the top overflow port, and the heavy phase is discharged from the bottom valve. Although this process has a simple structure, when dealing with materials containing surfactants or colloidal particles, an emulsion foam layer with a thickness of 10-30 cm is continuously generated at the interface of the separation tank. The existing equipment relies on fixed mechanical scrapers to clean the foam regularly, but cannot respond to real-time fluctuations in the liquid level - when the feed flow rate changes ± 15%, the liquid level fluctuation amplitude of the separation tank is more than ± 20 cm, resulting in fixed scrapers either being buried in the liquid and failing to work, or being suspended and unable to contact the foam layer.

[0004] This static defoaming mechanism causes three technical defects: first, the impurities enriched in the foam layer undergo secondary emulsification as the residence time increases, causing the turbidity of the light phase product to deteriorate from ≤5 NTU to more than 50 NTU, significantly reducing the light transmittance of optical grade chemicals; second, the accumulation of foam squeezes the effective separation space, causing the actual capacity of a device with a theoretical treatment capacity of 120 m³ / h to decay to 80 m³ / h; third, manual adjustment of the scraper height results in 2-3 production stops per shift, disrupting the continuous production rhythm. More seriously, in extraction systems involving flammable solvents, the scraper cannot rise and fall with the liquid level, and thus cannot realize automatic defoaming. Therefore, the development of a self-adaptive defoaming system with liquid level tracking capability has become an urgent device. SUMMARY

[0005] The chemical extraction separation device aims to solve the problem that the scraper cannot rise and fall with the liquid level, thereby realizing automatic defoaming work.

[0006] To achieve the above object, the present application provides the following technical scheme: A chemical extraction separation device, comprising a separation tank, a driving groove is longitudinally arranged on the top of the separation tank, a driving mechanism is arranged in the driving groove and can move along the groove, a scraper assembly for scraping the surface material is slidably connected to the inner wall of the driving groove, an installation block is fixedly connected to one side of the scraper assembly, a capacitive sensor for detecting the liquid level is arranged on one side of the bottom of the installation block, a single-chip microcomputer controller is fixedly installed on the top of the driving mechanism, a scraper adjusting assembly for automatically adjusting the height of the scraper is arranged on the other side of the bottom of the installation block, the scraper adjusting assembly comprises a sliding groove block fixedly connected to the installation block, a pressure sensor is fixedly installed at one end of the inside of the sliding groove block, and limit sliding grooves are symmetrically arranged on the inner wall of the sliding groove block.

[0007] Preferably, a mixing tank for pretreating the material is further arranged, and the mixing tank and the separation tank are fixedly communicated through an overflow.

[0008] Preferably, the driving mechanism comprises a motor support plate fixedly connected to the top of the separation tank, a driving motor is fixedly installed on the top of the motor support plate, two parallel driving lead screws are rotatably connected to the inner wall of the driving groove, and one end of one of the driving lead screws is rigidly connected to the output end of the driving motor.

[0009] Preferably, driving sprockets are coaxially fixedly connected to the positions close to the driving ends on the surfaces of the two driving lead screws, and the two driving sprockets are synchronously and drivingly connected through a driving chain.

[0010] Preferably, the scraper assembly comprises a support rod and a floating scum scraper for scraping the floating scum or the layering interface, threaded blocks matched with the driving lead screws are fixedly connected to the surfaces of the two sides of the support rod, electric telescopic rods for adjusting the height of the scraper are fixedly installed on the two sides of the bottom of the support rod, and the output ends of the two electric telescopic rods are fixedly connected to one side of the floating scum scraper.

[0011] Preferably, the scraper adjusting assembly further comprises a counterweight block slidably connected between the two limit sliding grooves, a foam floating plate that can float with the liquid level is fixedly arranged on the bottom of the counterweight block, and a trigger rod for triggering the pressure sensor is vertically and fixedly connected to the top of the counterweight block.

[0012] Compared with the prior art, the present application has the following beneficial effects: 1、The present application detects the liquid level of the separation tank in real time through the capacitive sensor, and feeds back the data to the single-chip microcomputer controller. The controller automatically adjusts the telescopic amount of the electric telescopic rod according to the data, drives the floating scrapper to ascend and descend accurately, and ensures that the lower edge of the scrapper always maintains the optimal contact distance with the liquid level or the separation interface. This solves the problems that the scrapper is suspended (scraping failure) or inserted into the liquid layer too deeply (disturbing the separation interface) due to the liquid level fluctuation of the traditional device.

[0013] 2、The present application also uses the double control system composed of the pressure sensor and the capacitive sensor, so that the foam floating plate floats with the liquid level, and drives the counterweight block to move vertically in the sliding groove block. When the scrapper contacts the material layer, the reaction force of the material is transmitted to the counterweight block through the scrapper, and pushes the trigger rod to extrude the pressure sensor. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structural diagram of the chemical extraction separation device of the present application; Figure 2 It is a partial enlarged view A of the structure of the chemical extraction separation device of the present application; Figure 3 It is a side view of the scrapper assembly of the chemical extraction separation device of the present application; Figure 4 It is another side view of the scrapper assembly of the chemical extraction separation device of the present application; Figure 5 It is a partial enlarged view B of the structure of the chemical extraction separation device of the present application.

[0015] In the figure: 1, mixing tank; 2, overflow; 3, separation tank; 4, transmission groove; 5, motor support plate; 6, drive motor; 7, single-chip microcomputer controller; 8, transmission screw; 9, transmission chain wheel; 10, transmission chain; 11, support rod; 12, threaded block; 13, electric telescopic rod; 14, floating scrapper; 15, mounting block; 16, capacitive sensor; 17, sliding groove block; 18, counterweight block; 19, pressure sensor; 20, foam floating plate; 21, trigger rod. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application.

[0017] Please refer to Figures 1-5The application provides a chemical extraction and separation device, which comprises a mixing tank 1 and a separation tank 3, overflow fittings 2 are fixedly connected between the mixing tank 1 and the separation tank 3, a transmission groove 4 is arranged at the top of the separation tank 3, a moving mechanism is arranged in the transmission groove 4, a scraper assembly is slidably connected to the inner wall of the transmission groove 4, an installation block 15 is fixedly connected to one side of the scraper assembly, a capacitance sensor 16 is arranged on one side of the bottom of the installation block 15, a single-chip microcomputer controller 7 is fixedly installed at the top of the moving mechanism, and a scraper adjusting assembly is arranged on the other side of the bottom of the installation block 15.

[0018] Referring to Figure 1 , Figure 2 and Figure 3 , further, the moving mechanism comprises a motor support plate 5, the motor support plate 5 is fixedly connected to the separation tank 3, a driving motor 6 is fixedly installed at the top of the motor support plate 5, transmission screw rods 8 are rotatably connected to the two sides of the inner wall of the transmission groove 4, one end of one of the transmission screw rods 8 is fixedly connected to the output end of the driving motor 6, transmission sprockets 9 are fixedly connected to one side of the surfaces of the two transmission screw rods 8, a transmission chain 10 is transmissionally connected between the two transmission sprockets 9, the scraper assembly comprises a support rod 11 and a foam scraper 14, threaded blocks 12 are fixedly connected to the surfaces of the two sides of the support rod 11, electric telescopic rods 13 are fixedly installed at the two sides of the bottom of the support rod 11, and the output ends of the two electric telescopic rods 13 are fixedly connected to one side of the foam scraper 14. In use, the driving motor 6 is started, the driving motor 6 drives the transmission screw rod 8 fixedly connected to the output end to rotate, under the action of the transmission sprocket 9 and the transmission chain 10, the other transmission screw rod 8 rotates synchronously, the two threaded blocks 12 are threadedly connected to the two transmission screw rods 8 respectively, at this time, the two threaded blocks 12 and the support rod 11 move, and the two electric telescopic rods 13 installed on the support rod 11 move with the foam scraper 14, so that the solution foam in the separation tank 3 is gathered to one end of the separation tank 3, and it is convenient for the staff to clean.

[0019] Referring to Figure 4 and Figure 5 , further, the scraper adjusting assembly comprises a sliding groove block 17, the sliding groove block 17 is fixedly connected to the installation block 15, a pressure sensor 19 is fixedly installed at one end in the sliding groove block 17, limit sliding grooves are arranged on the two sides of the inner wall of the sliding groove block 17, a counterweight block 18 is slidably connected between the two limit sliding grooves, a foam floating plate 20 is arranged at the bottom of the counterweight block 18, and a trigger rod 21 is fixedly connected to the top of the counterweight block 18. In use, after starting the device, the two electric telescopic rods 13 extend, at which time the floating scrapper 14 moves in the vertical direction. According to the characteristics of the floating, the threshold of the electric capacity sensor 16 is set. When the two probes of the electric capacity sensor 16 are in the air, there is almost no electric capacity value. When the two probes contact the floating, the electric capacity value is moderate and unstable. When the two probes contact the solution below the floating, the electric capacity value increases sharply and stably. The mounting block 15 is mounted on the bottom of one side of the floating scrapper 14. The probes of the electric capacity sensor 16 mounted on the mounting block 15 exceed the bottom of the floating scrapper 14 by a part. After the two probes pass through the floating and contact the solution, the electric capacity value of the electric capacity sensor 16 exceeds the threshold and is stable, sending a signal to the single-chip microcomputer controller 7. At this time, the single-chip microcomputer controller 7 stops the two electric telescopic rods 13. At this time, the bottom of the floating scrapper 14 is at the layering position of the solution and the floating. When the liquid level in the separation tank 3 rises, the solution contacts the foam float plate 20 and provides buoyancy to the foam float plate 20. The counterweight 18 has a certain weight, preventing the floating from triggering the lever 21 to trigger the pressure sensor 19. However, the weight of the counterweight 18 is much smaller than the buoyancy. The buoyancy drives the counterweight 18 and the trigger lever 21 to move upward. The trigger lever 21 contacts the pressure sensor 19. At this time, the single-chip microcomputer controller 7 detects that the pressure sensor 19 is pressed. Then, the electric telescopic rod 13 is controlled to retract. The electric telescopic rod 13 drives the floating scrapper 14 to move upward. After moving a certain distance, the solution no longer provides buoyancy to the foam float plate 20. The trigger lever 21 resets. At this time, the single-chip microcomputer controller 7 detects that the pressure sensor 19 is not pressed. At this time, the electric telescopic rod 13 stops. If the liquid level of the solution decreases, the single-chip microcomputer controller 7 detects that the electric capacity value of the electric capacity sensor 16 does not exceed the threshold. Then, the electric telescopic rod 13 is started to lower the floating scrapper 14 until the probes of the electric capacity sensor 16 contact the solution. The electric telescopic rod 13 stops, realizing self-adjustment of the position of the scrapper.

[0020] The embodiment of the application is used: the extraction liquid and solvent are added to the inside of the mixing tank 1 through the injection port of the mixing tank 1, then the two are fully mixed by the mixing device inside the mixing tank 1, the extraction liquid and solvent are continuously stirred while continuously added to the mixing tank 1, and then the mixed solution enters the inside of the separation tank 3 through the overflow piece 2. Because of the chemical properties of some medicaments, foam will be generated after mixing, the inside of the foam carries impurities, and the foam will affect separation, so the driving motor 6 is started to move the foam scraper 14, the foam in the separation tank 3 is gathered to one end of the separation tank 3, manual cleaning is facilitated, and the scraper adjusting assembly can adjust in real time according to the liquid level of the solution in the separation tank 3 to clean the foam on the surface of the solution in the separation tank 3. The model of the single-chip microcomputer controller 7 is STM32F103C8T6. It should be noted that the present application is a chemical extraction and separation device, all components are general standard components or components known to those skilled in the art, the structure and principle thereof are known to those skilled in the art through technical manuals or through conventional experimental methods, during the idle time of the device, all electrical components, power elements, electrical components, and the adapted monitoring computer and power supply are connected by wires, the specific connection means should be referred to the working principle described above, the electrical components are sequentially connected in electrical connection, and the detailed connection means is a known technology in the art.

[0021] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to part of the technical features, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A chemical extraction separation apparatus, characterized by: The utility model relates to a kind of automatic cleaning device of separating tank, including separating tank (3), the top of the separating tank (3) is longitudinally provided with transmission groove (4), the inside of the transmission groove (4) is configured with the drive mechanism movable along groove, the inner wall of the transmission groove (4) is slidably connected with the scraper assembly for scraping surface material, one side of the scraper assembly is fixedly connected with mounting block (15), one side of the bottom of the mounting block (15) is provided with the capacitance sensor (16) for detecting liquid level height, the top of the drive mechanism is fixedly installed with single-chip microcontroller (7), the other side of the bottom of the mounting block (15) is provided with the scraper adjusting assembly for automatically adjusting the height of scraper, the scraper adjusting assembly includes sliding groove block (17) fixedly connected on mounting block (15), one end of the inside of the sliding groove block (17) is embeddedly fixedly installed with pressure sensor (19), two sides of the inner wall of the sliding groove block (17) are symmetrically provided with limit sliding groove.

2. The chemical extraction separation device according to claim 1, characterized in that: It also includes a mixing tank (1) for material pretreatment, the mixing tank (1) and the separating tank (3) are fixedly communicated through overflow (2).

3. The chemical extraction separation device according to claim 1, characterized in that: The drive mechanism includes motor support plate (5) fixedly connected at the top of the separating tank (3), the top of the motor support plate (5) is fixedly installed with drive motor (6), two parallel transmission lead screws (8) are rotatably connected on the inner wall of the transmission groove (4), one end of one of the transmission lead screws (8) is rigidly connected with the output end of the drive motor (6).

4. The chemical extraction separation device according to claim 3, characterized in that: The transmission lead screws (8) are coaxially fixedly connected with transmission sprocket (9) near the driving end on the surface.

5. The chemical extraction separation device according to claim 1, characterized in that: The scraper assembly includes support rod (11) and scum scraper (14) for removing scum or delamination interface, the two sides of the surface of the support rod (11) are fixedly connected with threaded block (12) matched with transmission lead screw (8), the two sides of the bottom of the support rod (11) are fixedly installed with electric telescopic rod (13) for adjusting the height of scraper, the output end of the two electric telescopic rods (13) is fixedly connected with one side of scum scraper (14).

6. A chemical extraction separation device according to claim 5, wherein: The scraper adjusting assembly further includes counterweight (18) slidably connected between the two limit sliding grooves, the bottom of the counterweight (18) is fixedly provided with foam float (20) that can float with liquid level, the top of the counterweight (18) is vertically fixedly connected with trigger rod (21) for triggering pressure sensor (19).

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