Single-effect extraction and concentration system and method

Abstract

The present application discloses a single-effect extraction and concentration system and method, which relates to the field of liquid extraction and concentration, and includes a material tank, an extraction tank, a gas-liquid separator, a storage tank, a steam compressor and a steam pipeline, wherein the material tank is connected to the extraction tank, the air inlet of the gas-liquid separator is connected to the inside of the extraction tank, the water outlet of the gas-liquid separator is connected to the storage tank, the air outlet of the gas-liquid separator is connected to the inlet of the steam compressor, a steam inlet pipe is further provided on the steam pipeline, a partition is formed on the outer wall of the extraction tank, the steam pipeline is used to connect the steam compressor and the partition, and the partition is connected to the air inlet of the gas-liquid separator. The present application helps to save steam usage.

Description

Technical Field

[0001] The present application relates to the field of liquid extraction and concentration, and in particular to a single-effect extraction and concentration system and method. Background Art

[0002] At present, some liquid solutions (such as medicinal solutions, etc.) need to be extracted and concentrated to increase the concentration after processing.

[0003] The existing extraction and concentration device includes a material tank, an extraction tank and a gas-liquid separator. The liquid solution in the material tank is passed into the extraction tank. The extraction tank is heated by steam to heat the solution in the extraction tank to evaporate it. The evaporated water vapor is separated by the gas-liquid separator, and the separated liquid is the extracted and concentrated liquid.

[0004] Steam is continuously introduced into the compartment of the extraction tank, but after the solution in the extraction tank reaches the boiling point, a large amount of steam is not needed to maintain the boiling state, so the current heating of the extraction tank wastes steam. Summary of the invention

[0005] In order to save steam usage, the present application provides a single-effect extraction and concentration system and method.

[0006] The present application provides a single-effect extraction and concentration system and method using the following technical solutions:

[0007] A single-effect extraction and concentration system comprises a material tank, an extraction tank, a gas-liquid separator, a storage tank, a steam compressor and a steam pipeline, wherein the material tank is connected to the extraction tank, the air inlet of the gas-liquid separator is connected to the inside of the extraction tank, the water outlet of the gas-liquid separator is connected to the storage tank, the air outlet of the gas-liquid separator is connected to the inlet of the steam compressor, a steam inlet pipe is further arranged on the steam pipeline, a partition is formed on the outer wall of the extraction tank, the steam pipeline is used to connect the steam compressor and the partition, and the partition is connected to the air inlet of the gas-liquid separator.

[0008] By adopting the above technical scheme, the liquid raw material in the material tank is passed into the extraction tank by pumping, and steam is passed into the steam pipeline from the steam inlet pipe, and the steam enters the extraction tank to heat the liquid; after working for a period of time, the internal liquid boils, and the water vapor generated by the heating in the extraction tank enters the gas-liquid separator, and then the gas flows out from the gas outlet of the gas-liquid separator, and then flows back to the compartment of the extraction tank after being pressurized and heated by the steam compressor, that is, the steam generated in the extraction tank is utilized, and the amount of steam introduced at the steam inlet pipe can be reduced. In practice, when the internal balance is reached, the steam inlet pipe can be closed, and when the internal pressure becomes smaller, the steam inlet pipe can be opened to add steam inside, which helps to reduce the use of steam and greatly saves costs.

[0009] Preferably, a stirring shaft is rotatably arranged in the extraction tank, and a plurality of stirring blades are arranged on the stirring shaft.

[0010] By adopting the above technical solution, as the steam enters the interlayer, the heat will first be conducted to the inner wall of the extraction tank, and then the heat will gradually be conducted to the inside of the solution, so the solution is not heated evenly; during the heating process, the stirring shaft drives the stirring blades to rotate, stirring the liquid solution, causing the liquid to flow, which helps to make the liquid heated evenly.

[0011] Preferably, a feed pipe is connected between the extraction tank and the material tank, a delivery pump is provided on the feed pipe, and a fixed plate is fixedly connected inside the feed pipe, a flow gap for solution circulation is formed between the fixed plate and the inner wall of the feed pipe, an opening and closing plate is rotatably provided on the fixed plate, and the opening and closing plate is used to seal the flow gap.

[0012] By adopting the above technical solution, in the initial state, the opening and closing plate rotates, the flow gap opens, and the delivery pump runs to deliver the solution in the material tank to the extraction tank. When the solution in the extraction tank reaches a certain liquid level, the opening and closing plate rotates to block the flow gap and stop delivering the solution to the extraction tank.

[0013] Preferably, a driving shaft is rotatably provided at the bottom of the extraction tank, the driving shaft extends into the feeding tube, the opening and closing plate is semicircular, the opening and closing plate is provided with a driving groove, the driving shaft extends into the driving groove of the opening and closing plate, a first ratchet is coaxially fixed on the driving shaft, the first ratchet is located in the driving groove, a sliding groove is provided on the opening and closing plate, the end of the sliding groove is connected with the driving groove, the opening and closing plate is located in the sliding groove and is slidably connected with a connecting rod, the end of the connecting rod is integrally formed with a first ratchet, and the first ratchet is meshed with the first ratchet; a receiving groove is provided on the upper inner wall of the feeding tube, and a compression spring is installed in the feeding tube located in the receiving groove; when the opening and closing plate is rotated to open the flow gap, the receiving groove is connected with the sliding groove, and when the sliding groove is not connected with the receiving groove, the connecting rod cannot slide in the sliding groove; a limiting plate is provided on one side of the fixed plate, and when the opening and closing plate is rotated to open, the opening and closing plate abuts against the limiting plate.

[0014] By adopting the above technical scheme, when the liquid level in the extraction tank drops to a certain level, the driving shaft rotates, and with the cooperation of the first ratchet and the first ratchet, the opening and closing plate can be driven to rotate 180 degrees, so that the opening and closing plate is set in an upper semicircular shape, and due to the abutment and cooperation between the limit plate and the opening and closing plate, the opening and closing plate maintains this state, the flow gap is opened, and liquid can be replenished into the extraction tank; after the opening and closing plate is rotated and opened, the driving shaft will continue to rotate, because the receiving groove is connected with the sliding groove, when the first ratchet rotates, the first ratchet and the connecting rod will slide in the sliding groove toward the receiving groove, thereby avoiding the rotation of the first ratchet; when the liquid level rises to a certain level, the driving shaft reverses, and due to the action of the compression spring, the first ratchet will always abut against the first ratchet, and the first ratchet and the first pawl cooperate to drive the opening and closing plate to rotate and reset, thereby achieving the blocking of the flow gap.

[0015] Preferably, a floating plate is connected to the stirring shaft for lifting and sliding, and the floating plate floats on the liquid surface, a ring is provided in the middle of the floating plate, and the ring is sleeved on the stirring shaft, and the stirring shaft is provided with guide grooves relatively in the vertical direction, and a horizontal rod is provided in the middle of the ring, and the horizontal rod is slidingly matched with the two guide grooves; a linkage rod is fixedly connected to the horizontal rod; a driving bin is formed on the bottom wall of the extraction tank, and the lower end of the stirring shaft is rotatably matched with the outer wall of the driving bin, and a first bevel gear and a second bevel gear are rotatably connected in the driving bin, the rotation axis of the first bevel gear is vertical, and the rotation axis of the second bevel gear is horizontal, the first bevel gear and the second bevel gear are meshed and matched, and the driving shaft and the second bevel gear are coaxially fixed; when the liquid level drops, the floating plate drops, and the linkage rod drops to form a coaxial rotation match with the first bevel gear.

[0016] By adopting the above technical solution, when the liquid level in the extraction tank drops, the floating plate drops accordingly, the horizontal rod drops, and the linkage rod drives the linkage rod to drop. The linkage rod and the first bevel gear form a coaxial rotation match. Since the floating plate rotates synchronously with the stirring shaft, the linkage rod rotates synchronously with the stirring shaft, that is, the linkage rod rotates synchronously with the stirring shaft, the linkage rod drives the first bevel gear to rotate, and the first bevel gear drives the second bevel gear to rotate, thereby realizing the rotation of the drive shaft.

[0017] Preferably, a rotating shaft is rotatably connected in the driving warehouse, the first bevel gear is coaxially fixed on the rotating shaft, a plug-in groove is provided in the middle of the rotating shaft and is plugged into and cooperated with the linkage rod, a positioning groove is provided on the side wall of the rotating shaft located in the plug-in groove, the upper side of the positioning groove is open, a movable groove is provided at the lower end of the linkage rod, the linkage rod is slidably connected with a wedge block in the movable groove, and an abutment spring is installed on the linkage rod in the movable groove, one end of the abutment spring is connected to the wedge block, and the other end of the abutment spring is connected to the inner wall of the movable groove, and in the initial state, the wedge block extends out of the movable groove.

[0018] By adopting the above technical solution, when the liquid level drops, the linkage rod drops. When the liquid level drops to a certain level, the lower end of the linkage rod is plugged into the plug-in groove. If the wedge block just corresponds to the positioning groove, the wedge block directly enters the positioning groove to achieve coaxial fixation with the first bevel gear, and the linkage rod drives the first bevel gear to rotate synchronously; if the wedge block does not correspond to the positioning groove, the wedge block will abut against the notch of the plug-in groove, and then the wedge block will slide into the moving groove, so that the linkage rod smoothly enters the plug-in groove. When the linkage rod enters the plug-in groove, the linkage rod rotates. When the wedge block is docked with the positioning groove, the abutment spring acts to make the wedge block plug into the positioning groove, thereby achieving coaxial rotation of the linkage rod and the first bevel gear.

[0019] Preferably, a lifting and sliding arrangement is provided in the driving bin, and the lifting and sliding arrangement is provided with a lifting plate, the lifting plate is slidably connected with a second ratchet tooth, and a second ratchet wheel is coaxially fixed on the driving shaft; an avoidance groove is provided on the lifting plate, and the second ratchet tooth slides in the avoidance groove, and the lifting plate is provided with a return spring in the avoidance groove, one end of the return spring is connected with the second ratchet tooth, and the other end of the return spring is connected with the inner wall of the avoidance groove; a sleeve is sleeved on the linkage rod, and a fixing rod is fixedly connected to the sleeve, and the lower end of the fixing rod is fixedly connected to the lifting plate, and the linkage rod is located at the upper side of the sleeve and is provided with an upper limit plate, and the linkage rod is located at the lower side of the sleeve and is provided with a lower limit plate; when the linkage rod descends, the upper limit plate drives the sleeve to descend, and the second ratchet tooth will move to the lower side of the second ratchet wheel, and when the linkage rod rises, the linkage rod first slides upward relative to the sleeve until the sleeve abuts against the lower limit plate, and the lower limit plate drives the sleeve to rise, at this time, the second ratchet tooth drives the second ratchet wheel to rotate, that is, drives the driving shaft to rotate, so as to realize the closing of the opening and closing plate.

[0020] By adopting the above technical solution, when the liquid level drops, the linkage rod drops, and the linkage rod and the first bevel gear form a coaxial rotation, thereby realizing the opening of the opening and closing plate and performing the liquid replenishing action. At this time, the linkage rod will drive the lifting plate to drop, that is, the second ratchet moves to the lower side of the second ratchet wheel. In this process, the second ratchet will slide into the avoidance groove to avoid the second ratchet tooth; during the liquid replenishing process, as the liquid level gradually rises, the floating plate will drive the linkage rod to rise. When the linkage rod is disengaged from the first bevel gear, the rising distance of the floating plate is small, that is, the amount of liquid replenishment is not large, and the liquid replenishment continues at this time. When the liquid replenishment is about to be completed, the lower limit plate on the linkage rod abuts against the sleeve and drives the sleeve to rise, and the second ratchet drives the second ratchet wheel to rotate, that is, drives the drive shaft to rotate, to realize the closing of the opening and closing plate, and stop the liquid replenishment; in this way, the liquid replenishment time can be extended, thereby ensuring sufficient liquid replenishment.

[0021] Preferably, the driving shaft is further provided with a spiral blade. When the fluid is replenished, the solution impacts the spiral blade and exerts force on the spiral blade, so that the driving shaft tends to drive the opening and closing plate to rotate in the opening direction.

[0022] By adopting the above technical solution, when replenishing the fluid, the driving shaft will rotate to drive the spiral blades to rotate, stirring the solution replenished from the bottom, so that the solution is quickly mixed. When the linkage rod is disengaged from the first bevel gear, the driving shaft stops rotating. At this time, the fluid continues to be replenished, and the solution impacts the spiral blades, exerting force on the spiral blades, so that the rotation of the driving shaft has a tendency to drive the opening and closing plate to rotate in the opening direction, thereby preventing the opening and closing plate from being accidentally closed due to vibration of the liquid inlet pipe during the flow of the solution.

[0023] A single-effect extraction and concentration method, using the above-mentioned single-effect extraction and concentration system, is characterized in that the steps are as follows:

[0024] S1: introducing solution into the extraction tank;

[0025] S2: Saturated steam is introduced into the interlayer of the extraction tank from the steam inlet pipe. The steam heats the solution, and the generated steam is separated by the gas-liquid separator. The liquid is discharged as a concentrated solution, and the steam enters the interlayer again after being pressurized by the steam compressor;

[0026] S3: When the solution in the extraction tank boils, close the steam inlet pipe.

[0027] Preferably, in step S3, when the steam pressure in the interlayer drops, the steam inlet pipe is opened to supplement steam.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] 1. Steam is introduced into the interlayer to heat the solution. The steam generated after heating and boiling enters the gas-liquid separation, where the separated liquid is the concentrated solution. The separated steam is returned to the interlayer after being pressurized and heated by the steam compressor, thus realizing the recycling of steam. When the solution boils, that is, when the internal heating balance is stable, the steam inlet pipe can be closed to reduce the amount of steam introduced and save steam. When the steam pressure in the interlayer drops, the steam inlet pipe can be opened for replenishment.

[0030] 2. When the liquid level in the extraction tank drops, the floating plate drives the linkage rod to drop, and the linkage rod meshes with the first bevel gear after it drops. The first bevel gear drives the driving shaft to rotate through the second bevel gear, and the driving shaft drives the opening and closing plate to rotate through the first ratchet and the first ratchet, so that the flow gap is opened and the liquid is replenished into the extraction tank. When the liquid level in the extraction tank rises, the linkage rod rises and disengages from the first bevel gear, and then the second ratchet drives the second ratchet to rotate, that is, drives the driving shaft to rotate, so that the opening and closing plate is closed and the liquid replenishment action is stopped;

[0031] 3. During the fluid replenishment process, the floating plate will drive the linkage rod to move upward. After the linkage rod and the first bevel gear are disengaged, the fluid replenishment will continue. The solution will impact the spiral blades, exerting force on the spiral blades, causing the drive shaft to rotate and drive the opening and closing plate to rotate in the opening direction, thereby preventing the opening and closing plate from being accidentally closed due to vibration of the liquid inlet pipe caused by the flow of the solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is an overall schematic diagram of a single-effect extraction and concentration system according to an embodiment of the present application;

[0033] Figure 2 This is a cross-sectional view of the overall structure of the extraction tank in the embodiment of the present application;

[0034] Figure 3 This is a schematic diagram of the cross-sectional structure of the feed pipe in the embodiment of the present application;

[0035] Figure 4 This is a cross-sectional view of the overall structure of the extraction tank in the embodiment of the present application;

[0036] Figure 5 This is a partial structural schematic diagram of an embodiment of the present application, which mainly reflects the coordination schematic diagram of the linkage rod and the rotating shaft;

[0037] Figure 6 A partial structural diagram of an embodiment of the present application mainly reflects a schematic diagram of the coordination between the second ratchet and the second ratchet wheel.

[0038] Figure numerals: 1, material tank; 2, extraction tank; 21, interlayer; 22, drain pipe; 23, drive chamber; 231, rotating shaft; 3, gas-liquid separator; 4, storage tank; 5, steam compressor; 6, steam pipeline; 61, steam inlet pipe; 7, feed pipe; 71, fixed plate; 711, limit plate; 72, flow gap; 73, receiving groove; 731, compression spring; 8, stirring shaft; 81, stirring blade; 82, guide groove; 9, opening and closing plate; 91, driving groove; 92, sliding groove; 10, driving shaft; 101, first ratchet; 102 , second ratchet; 103, spiral blade; 20, connecting rod; 201, first ratchet; 30, floating plate; 301, collar; 302, horizontal rod; 40, linkage rod; 401, movable groove; 402, wedge block; 403, abutment spring; 404, upper limit plate; 405, lower limit plate; 50, first bevel gear; 501, plug-in groove; 502, positioning groove; 60, second bevel gear; 70, lifting plate; 701, avoidance groove; 702, second ratchet; 703, reset spring; 80, sleeve; 801, fixing rod. DETAILED DESCRIPTION

[0039] The following is combined with Figure 1-Figure 6 This application is described in further detail.

[0040] The embodiments of the present application disclose a single-effect extraction and concentration system and method.

[0041] Reference Figure 1 and Figure 2 The single-effect extraction and concentration system includes a material tank 1, an extraction tank 2, a gas-liquid separator 3, a storage tank 4, a steam compressor 5 and a steam pipe 6. The material tank 1 is connected to the interior of the extraction tank 2 through a feed pipe 7. The air inlet of the gas-liquid separator 3 is connected to the interior of the extraction tank 2. The water outlet of the gas-liquid separator 3 is connected to the storage tank 4. The air outlet of the gas-liquid separator 3 is connected to the inlet of the steam compressor 5. A partition 21 is formed on the outer wall of the extraction tank 2. The steam pipe 6 is used to connect the steam compressor 5 and the partition 21. A steam inlet pipe 61 is formed on the steam pipe 6. The partition 21 is also connected to the air inlet of the gas-liquid separator 3.

[0042] A delivery pump is installed on the feed pipe 7, which delivers the solution in the material tank 1 to the extraction tank 2 by pumping, and saturated steam is introduced into the interlayer 21 from the steam inlet pipe 61 to heat the solution in the extraction tank 2. After the solution boils, the generated water vapor enters the gas-liquid separator 3, and the liquid enters the storage tank 4. This liquid is the concentrated high-concentration solution. The separated gas enters the steam pipe 6 after being pressurized and heated by the steam compressor 5, and finally enters the interlayer 21 for reuse. In this way, the recycling of steam is realized, and the steam generated by evaporation in the solution is utilized, which can reduce the amount of steam introduced at the steam inlet pipe 61, thereby saving steam. In the process of long-term use, after the internal steam pressure is balanced, the steam inlet pipe 61 can be closed to stop the supply of steam. After the subsequent steam pressure drops, the steam inlet pipe 61 can be opened to replenish steam.

[0043] The bottom of the partition 21 is also connected with a drain pipe 22. After the steam enters the partition 21, there will be a heat exchange process, and part of the steam will condense into water and accumulate at the bottom of the partition 21. The condensed water can be discharged through the drain pipe 22.

[0044] A stirring shaft 8 is rotatably arranged in the extraction tank 2, and a plurality of stirring blades 81 are coaxially fixed on the stirring shaft 8. The stirring shaft 8 is driven to rotate by a motor. Steam is introduced into the interlayer 21 for heating, and the heat is conducted from the outside to the inside, which causes uneven heating of the solution, affecting the effect of extraction and concentration; the rotation of the stirring blades 81 causes the solution to flow, thereby making the solution evenly heated, which helps to ensure the effect of extraction and concentration.

[0045] Reference Figure 2 and Figure 3A fixed plate 71 is fixedly connected to the feed pipe 7, and a flow gap 72 for solution circulation is formed between the fixed plate 71 and the inner wall of the feed pipe 7. An opening and closing plate 9 is rotatably arranged on the fixed plate 71, and the opening and closing plate 9 is used to block the flow gap 72; the opening and closing plate 9 is semicircular, and the rotation axis of the opening and closing plate 9 is colinear with the axis of the feed pipe 7. When the opening and closing plate 9 is opened, that is, the flow gap 72 is opened, the solution in the material tank 1 can be transported to the extraction tank 2. When the solution in the extraction tank 2 reaches a certain liquid level, the opening and closing plate 9 is closed and the liquid supply is stopped; and in practice, when the liquid level drops to a certain extent, the opening and closing plate 9 will open to replenish the liquid in the extraction tank 2, and when it reaches a certain liquid level, the opening and closing plate 9 will be closed.

[0046] A driving shaft 10 is rotatably provided at the bottom of the extraction tank 2, and the driving shaft 10 extends into the feeding pipe 7. A driving groove 91 is provided on the opening and closing plate 9, and the driving shaft 10 extends into the driving groove 91. A first ratchet 101 is coaxially fixed on the driving shaft 10 and the first ratchet 101 is located in the driving groove 91. A sliding groove 92 is provided on the opening and closing plate 9, and the length direction of the sliding groove 92 is the radial direction of the opening and closing plate 9. One end of the sliding groove 92 is connected to the driving groove 91. The opening and closing plate 9 is located in the sliding groove 92 and is slidably connected with a connecting rod 20. The end of the connecting rod 20 is integrally formed with a first ratchet 201, and the first ratchet 201 is meshed with the first ratchet 101. An accommodating groove 73 is provided on the inner wall of the upper side of the feed pipe 7. A compression spring 731 is installed in the accommodating groove 73 of the feed pipe 7. When the opening and closing plate 9 is opened, the accommodating groove 73 is connected to the sliding groove 92. When the opening and closing plate 9 is not fully opened, that is, the accommodating groove 73 is not connected to the sliding groove 92, the connecting rod 20 cannot slide. A limiting plate 711 is fixedly connected to one side of the fixed plate 71. When the opening and closing plate 9 is fully opened, that is, rotated 180 degrees, the opening and closing plate 9 abuts against the limiting plate 711 to limit the opening and closing plate 9.

[0047] When the liquid level in the extraction tank 2 drops to a certain level, the drive shaft 10 rotates, driving the first ratchet 101 to rotate, and the first ratchet 101 drives the opening and closing plate 9 to rotate through the first ratchet teeth 201. The opening and closing plate 9 rotates 180 degrees and abuts against the limit plate 711. At this time, the opening and closing plate 9 is in an upper semicircular state, the flow gap 72 is opened, and the pumped solution enters the extraction tank 2 for fluid replenishment; because the opening and closing plate 9 only rotates 180 degrees, the rotation angle of the drive shaft 10 is usually greater than 180 degrees, because the receiving groove 73 and the sliding groove 9 2, when the first ratchet 101 rotates, the first ratchet tooth 201 and the connecting rod 20 slide in the sliding groove 92 and slide toward the accommodating groove 73 to avoid the rotation of the first ratchet 101; when the liquid level rises to a certain extent, the driving shaft 10 reverses, and under the action of the compression spring 731, the first ratchet 101 and the first ratchet tooth 201 are always in contact, and under the cooperation of the first ratchet 101 and the first ratchet tooth 201, the opening and closing plate 9 is driven to rotate and reset, the flow gap 72 is closed, and the liquid replenishment is stopped.

[0048] Reference Figure 2 and Figure 4 The stirring shaft 8 is hollow, and a floating plate 30 is provided on the stirring shaft 8 for lifting and sliding. The floating plate 30 floats on the liquid surface. A sleeve 301 is integrally formed in the middle of the floating plate 30. The sleeve 301 is sleeved on the stirring shaft 8. Guide grooves 82 are relatively opened on the stirring shaft 8 in the vertical direction. A horizontal rod 302 is fixedly connected to the middle of the sleeve 301. The horizontal rod 302 is slidably matched with the two guide grooves 82. The stirring shaft 8 drives the floating plate 30 to rotate synchronously through the horizontal rod 302. The horizontal rod 302 is fixedly connected with a linkage rod 40, the bottom wall of the extraction tank 2 is fixedly connected with a driving bin 23, the lower end of the stirring shaft 8 is rotatably matched with the outer wall of the driving bin 23, the driving bin 23 is rotatably connected with a rotating shaft 231, the rotating shaft 231 is coaxially fixed with a first bevel gear 50, the end of the driving shaft 10 away from the clutch plate 9 extends into the driving bin 23, the end of the driving shaft 10 extending into the driving bin 23 is coaxially fixed with a second bevel gear 60, the rotation axis of the first bevel gear 50 is vertical, the rotation axis of the second bevel gear 60 is horizontal, and the first bevel gear 50 and the second bevel gear 60 are meshed. When the liquid level drops, the floating plate 30 drops, and drives the linkage rod 40 to drop to form a coaxial rotation match with the first bevel gear 50.

[0049] Reference Figure 4 and Figure 5 A plug-in slot 501 which is plugged into and cooperates with the linkage rod 40 is provided in the middle of the rotating shaft 231, and a positioning slot 502 is also provided on the side wall of the rotating shaft 231 located at the plug-in slot 501. The positioning slot 502 is set to be open on the upper side, and a moving slot 401 is provided at the lower end of the linkage rod 40. The linkage rod 40 is located in the moving slot 401 and is slidably matched with a wedge block 402. The linkage rod 40 is located in the moving slot 401 and is installed with an abutment spring 403. One end of the abutment spring 403 is connected to the wedge block 402, and the other end is connected to the inner wall of the moving slot 401. In the initial state, the wedge block 402 extends out of the moving slot 401.

[0050] When the liquid level in the extraction tank 2 drops, the floating plate 30 drops accordingly, driving the horizontal rod 302 and the linkage rod 40 to drop. When the liquid level drops to a certain extent, the insertion groove 501 of the linkage rod 40 is plugged in. If the wedge block 402 just corresponds to the positioning groove 502, the wedge block 402 directly enters the positioning groove 502 to achieve coaxial fixation with the first bevel gear 50, and the linkage rod 40 drives the first bevel gear 50 to rotate synchronously; if the wedge block 402 does not correspond to the positioning groove 502, the linkage rod 40 drives the first bevel gear 50 to rotate synchronously. Correspondingly, the wedge block 402 will abut against the notch of the plug-in slot 501, and then the wedge block 402 will slide into the movable slot 401, so that the linkage rod 40 smoothly enters the plug-in slot 501. When the linkage rod 40 enters the plug-in slot 501, the linkage rod 40 rotates. When the wedge block 402 is docked with the positioning slot 502, the abutment spring 403 acts to make the wedge block 402 plug into the positioning slot 502, that is, the coaxial rotation cooperation of the linkage rod 40 and the first bevel gear 50 is realized. Because the stirring shaft 8 drives the linkage rod 40 to rotate, the linkage rod 40 drives the second bevel gear 60 to rotate through the first bevel gear 50, thereby realizing the rotation of the drive shaft 10. The rotation of the drive shaft 10 can realize the opening of the opening and closing plate 9.

[0051] Reference Figure 4 and Figure 6 A lifting plate 70 is provided in the driving bin 23 for lifting and lowering, and an avoidance groove 701 is opened on the lifting plate 70. The lifting plate 70 is located in the avoidance groove 701 and is slidably connected with a second ratchet 702. A second ratchet 102 is coaxially fixed on the driving shaft 10, and the second ratchet 702 is meshed with the second ratchet 102. The lifting plate 70 is located in the avoidance groove 701 and a return spring 703 is also installed. One end of the return spring 703 is connected to the second ratchet 702, and the other end is connected to the inner wall of the avoidance groove 701.

[0052] A sleeve 80 is sleeved on the linkage rod 40, and a fixing rod 801 is fixedly connected to the sleeve 80. The lower end of the fixing rod 801 extends into the driving bin 23, and the lower end of the fixing rod 801 is fixedly connected to the lifting plate 70. The linkage rod 40 is located on the upper side of the sleeve 80 and is fixedly connected to an upper limit plate 404, and the linkage rod 40 is located on the lower side of the sleeve 80 and is fixedly connected to a lower limit plate 405. In practice, the lifting plate 70 is slidably matched with the inner wall of the driving bin 23, so the sleeve 80 will not rotate with the rotation of the linkage rod 40.

[0053] The linkage rod 40 descends and forms a coaxial rotation with the first bevel gear 50 to realize the opening of the opening and closing plate 9 and perform the liquid replenishing action. When the linkage rod 40 descends, the upper limit plate 404 will drive the sleeve 80 to descend and make the second ratchet 702 move to the lower side of the second ratchet wheel 102. At this time, the second ratchet 702 will not drive the second ratchet wheel 102 to rotate, and the second ratchet 702 will slide into the avoidance groove 701 to avoid the second ratchet wheel 102. During the liquid replenishing process, the liquid level will gradually rise. That is, the linkage rod 40 gradually rises. When the linkage rod 40 is disengaged from the first bevel gear 50, the rising distance of the floating plate 30 is small, that is, the liquid level rising distance is small, and the opening and closing plate 9 remains in the open state, and the fluid replenishment continues. When the fluid replenishment reaches a certain level, the lower limit plate 405 on the linkage rod 40 contacts the sleeve 80 and drives the sleeve 80 to rise. The second ratchet 702 drives the second ratchet wheel 102 to rotate, that is, drives the drive shaft 10 to rotate, thereby closing the opening and closing plate 9 and stopping the fluid replenishment.

[0054] A spiral blade 103 is coaxially fixed on the drive shaft 10, and the spiral blade 103 is located between the drive bin 23 and the feed pipe 7. When the drive shaft 10 rotates during the rehydration, the spiral blade 103 rotates, stirring the solution at the bottom, so that the solution is quickly mixed. When the linkage rod 40 and the first bevel gear 50 are disengaged, the drive shaft 10 loses the driving source. At this time, the rehydration continues, and the solution impacts the spiral blade 103, exerting force on the spiral blade 103, so that the rotation of the drive shaft 10 has a tendency to drive the opening and closing plate 9 to rotate in the opening direction, which can prevent the vibration of the liquid inlet pipe during the flow of the solution, resulting in the opening and closing plate 9 being closed by mistake.

[0055] The implementation principle of a single-effect extraction and concentration system in an embodiment of the present application is as follows: a solution is introduced from a material tank 1 into an extraction tank 2, and then saturated steam is introduced from a steam inlet pipe 61 into the interlayer 21 to heat the extraction tank 2, and the water vapor generated after heating and boiling enters the gas-liquid separator 3, and the liquid separated from the gas-liquid separator 3 is the required concentrated high-concentration solution, and the steam separated from the gas-liquid separator 3 is pressurized and heated by a high-pressure fan, and then returned to the interlayer 21 for heating, that is, the steam generated in the solution is used as a heat source for heating, thereby reducing the amount of steam introduced at the steam inlet pipe 61, which helps to save steam; and in practice, after the solution boils and the internal steam cycle is stable, the steam inlet pipe 61 can be closed to stop the introduction of steam, thereby greatly reducing the amount of steam used, and it is only necessary to open the steam inlet pipe 61 to supplement an appropriate amount of steam when the internal steam pressure drops subsequently.

[0056] The single-effect extraction and concentration method uses the above extraction and concentration system, and the steps are as follows:

[0057] S1: introducing solution into extraction tank 2;

[0058] S2: Saturated steam is introduced into the compartment 21 of the extraction tank 2 from the steam inlet pipe 61, and the steam heats the solution. The generated steam is then separated by the gas-liquid separator 3, and the liquid is discharged as a concentrated solution. The steam is pressurized by the steam compressor 5 and then enters the compartment 21 again;

[0059] S3: When the solution in the extraction tank 2 boils, the steam inlet pipe 61 is closed.

[0060] In step S3, when the steam pressure in the compartment 21 drops, the steam inlet pipe 61 is opened to supplement steam.

[0061] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A single-effect extraction and concentration system, characterized in that: The invention comprises a material tank (1), an extraction tank (2), a gas-liquid separator (3), a material storage tank (4), a steam compressor (5) and a steam pipeline (6), wherein the material tank (1) is connected to the extraction tank (2), the air inlet of the gas-liquid separator (3) is connected to the inside of the extraction tank (2), the water outlet of the gas-liquid separator (3) is connected to the material storage tank (4), the air outlet of the gas-liquid separator (3) is connected to the inlet of the steam compressor (5), the steam pipeline (6) is further provided with a steam inlet pipe (61), the outer wall of the extraction tank (2) is formed with a partition (21), the steam pipeline (6) is used to connect the steam compressor (5) and the partition (21), and the partition (21) is connected to the air inlet of the gas-liquid separator (3); A feed pipe (7) is connected between the extraction tank (2) and the material tank (1), a delivery pump is provided on the feed pipe (7), and a fixed plate (71) is fixedly connected inside the feed pipe (7), a flow gap (72) for solution circulation is formed between the fixed plate (71) and the inner wall of the feed pipe (7), and an opening and closing plate (9) is rotatably provided on the fixed plate (71), and the opening and closing plate (9) is used to block the flow gap (72); A driving shaft (10) is rotatably provided at the bottom of the extraction tank (2), and the driving shaft (10) extends into the feed pipe (7). The opening and closing plate (9) is semicircular, and the opening and closing plate (9) is provided with a driving groove (91). The driving shaft (10) extends into the driving groove (91) of the opening and closing plate (9). A first ratchet (101) is coaxially fixed on the driving shaft (10), and the first ratchet (101) is located in the driving groove (91). A sliding groove (92) is provided on the opening and closing plate (9), and the end of the sliding groove (92) is connected to the driving groove (91). The opening and closing plate (9) is located in the sliding groove (92) and is slidably connected to a connecting rod (20), and the end of the connecting rod (20) A first ratchet tooth (201) is integrally formed, and the first ratchet tooth (201) meshes with the first ratchet wheel (101); a receiving groove (73) is provided on the upper inner wall of the feed pipe (7), and a compression spring (731) is installed in the receiving groove (73) of the feed pipe (7); when the opening and closing plate (9) rotates to open the flow gap (72), the receiving groove (73) is connected with the sliding groove (92), and when the sliding groove (92) is not connected with the receiving groove (73), the connecting rod (20) cannot slide in the sliding groove (92); a limiting plate (711) is provided on one side of the fixed plate (71), and when the opening and closing plate (9) rotates to open, the opening and closing plate (9) abuts against the limiting plate (711); A stirring shaft (8) is rotatably arranged in the extraction tank (2), and a floating plate (30) is slidably connected to the stirring shaft (8) in a lifting and sliding manner.

2. A single-effect extraction and concentration system according to claim 1, characterized in that: The stirring shaft (8) is provided with a plurality of stirring blades (81).

3. A single-effect extraction and concentration system according to claim 1, characterized in that: The floating plate (30) floats on the liquid surface. A collar (301) is provided in the middle of the floating plate (30). The collar (301) is sleeved on the stirring shaft (8). The stirring shaft (8) is provided with guide grooves (82) in a vertical direction. A horizontal rod (302) is provided in the middle of the collar (301). The horizontal rod (302) is slidably matched with the two guide grooves (82). A linkage rod (40) is fixedly connected to the horizontal rod (302). A driving chamber (23) is formed on the bottom wall of the extraction tank (2). The stirring shaft (8) is provided with a guide groove (82) in a vertical direction. The lower end of the drive shaft (10) is rotatably matched with the outer wall of the drive chamber (23); a first bevel gear (50) and a second bevel gear (60) are rotatably connected in the drive chamber (23); the rotation axis of the first bevel gear (50) is vertical, and the rotation axis of the second bevel gear (60) is horizontal; the first bevel gear (50) and the second bevel gear (60) are meshed and matched; the drive shaft (10) and the second bevel gear (60) are coaxially fixed; when the liquid level drops, the floating plate (30) drops, and the linkage rod (40) drops to form a coaxial rotational match with the first bevel gear (50).

4. A single-effect extraction and concentration system according to claim 3, characterized in that: A rotating shaft (231) is rotatably connected in the driving bin (23), the first bevel gear (50) is coaxially fixed on the rotating shaft (231), a plug-in slot (501) for plugging and matching with the linkage rod (40) is provided in the middle of the rotating shaft (231), a positioning slot (502) is also provided on the side wall of the rotating shaft (231) located at the plug-in slot (501), the upper side of the positioning slot (502) is open, and a moving slot is provided at the lower end of the linkage rod (40). (401), the linkage rod (40) is located in the movable groove (401) and is slidably connected with a wedge block (402), and the linkage rod (40) is located in the movable groove (401) and is installed with an abutment spring (403), one end of the abutment spring (403) is connected to the wedge block (402), and the other end of the abutment spring (403) is connected to the inner wall of the movable groove (401), and in the initial state, the wedge block (402) extends out of the movable groove (401).

5. A single-effect extraction and concentration system according to claim 3 or 4, characterized in that: A lifting plate (70) is provided in the driving bin (23) for lifting and sliding movement, and a second ratchet (702) is slidably connected to the lifting plate (70), and a second ratchet (102) is coaxially fixed to the driving shaft (10); an avoidance groove (701) is provided on the lifting plate (70), and the second ratchet (702) slides in the avoidance groove (701), and a return spring (703) is provided on the lifting plate (70) in the avoidance groove (701), one end of the return spring (703) is connected to the second ratchet (702), and the other end of the return spring (703) is connected to the inner wall of the avoidance groove (701); a sleeve (80) is sleeved on the linkage rod (40), and a fixed rod (801) is fixedly connected to the sleeve (80), and the fixed rod (801) The lower end of the linkage rod (40) is fixedly connected to the lifting plate (70), and the linkage rod (40) is provided with an upper limit plate (404) on the upper side of the sleeve (80), and the linkage rod (40) is provided with a lower limit plate (405) on the lower side of the sleeve (80); when the linkage rod (40) descends, the upper limit plate (404) drives the sleeve (80) to descend, and the second ratchet (702) moves to the lower side of the second ratchet wheel (102); when the linkage rod (40) rises, the linkage rod (40) first slides upward relative to the sleeve (80) until the sleeve (80) abuts against the lower limit plate (405), and the lower limit plate (405) drives the sleeve (80) to rise, at which time the second ratchet (702) drives the second ratchet wheel (102) to rotate, that is, drives the drive shaft (10) to rotate, so as to realize the closing of the opening and closing plate (9).

6. A single-effect extraction and concentration system according to claim 1, characterized in that: The driving shaft (10) is also provided with a spiral blade (103). When the fluid is replenished, the solution impacts the spiral blade (103) and exerts force on the spiral blade (103), so that the driving shaft (10) tends to drive the opening and closing plate (9) to rotate in the opening direction.

7. A single-effect extraction and concentration method, using the single-effect extraction and concentration system according to any one of claims 1 to 6, characterized in that: Here are the steps: S1: introducing a solution into the extraction tank (2); S2: Saturated steam is introduced into the partition (21) of the extraction tank (2) from the steam inlet pipe (61), and the steam heats the solution. The generated steam is then separated by the gas-liquid separator (3), and the liquid is discharged as a concentrated solution. The steam is pressurized by the steam compressor (5) and then enters the partition (21) again; S3: When the solution in the extraction tank (2) boils, the steam inlet pipe (61) is closed.

8. A single-effect extraction and concentration method according to claim 7, characterized in that: In step S3, when the steam pressure in the barrier (21) drops, the steam inlet pipe (61) is opened to supplement steam.

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