Continuous extraction device of heat pump low-temperature thickener

Abstract

The invention relates to the field of extraction and concentration, in particular to a heat pump low-temperature concentrator continuous extraction device which comprises an evaporation kettle, a liquid inlet formed in the left side of the upper portion of the evaporation kettle, a liquid outlet formed in the bottom of the evaporation kettle, a mounting opening formed in the right side of the lower portion of the evaporation kettle, an evaporation opening formed in the top of the evaporation kettle and a heat exchange pipeline mounted at the mounting opening. The blocking mechanism is arranged in the evaporation kettle. Through a blocking mechanism composed of four rotating plates controlled by a hydraulic cylinder, intermittent continuous feeding of a stock solution is achieved, in the operation process, when the rotating plates are horizontally closed, a temporary liquid storage area can be formed, it is ensured that the liquid level in the evaporation kettle is stable, uneven concentration caused by direct discharging is avoided, rotating opening and closing are achieved through cooperation of hydraulic drive and a connecting rope, and the working efficiency is improved. And the discharge flow of the concentrated solution is controllable.

Description

Technical Field

[0001] The present invention relates to the field of extraction and concentration, and particularly to a continuous extraction device for a heat pump low-temperature concentrator. Background Art

[0002] In industrial fields such as chemical engineering, food, pharmaceuticals, and environmental protection, material concentration is a fundamental and crucial process step. Traditional concentration technologies mostly use high-temperature evaporation. Although the efficiency is relatively high, it is easy to cause the decomposition or denaturation of heat-sensitive components, affecting product quality. Existing low-temperature concentration equipment often has problems such as low heat transfer efficiency, discontinuous concentration, and easy scaling, making it difficult to meet the requirements of industrial continuous production. In addition, conventional equipment also has deficiencies in aspects such as leak prevention, automatic cleaning, and heat energy recovery, resulting in high energy consumption and high maintenance costs.

[0003] Therefore, there is an urgent need to develop a new type of concentration device that can achieve low-temperature continuous extraction and has both high heat transfer efficiency and automatic cleaning functions. Summary of the Invention

[0004] In order to overcome the shortcomings of existing devices, the present invention provides a continuous extraction device for a heat pump low-temperature concentrator.

[0005] The technical solution of the present invention is as follows: A continuous extraction device for a heat pump low-temperature concentrator includes:

[0006] An evaporation kettle;

[0007] A liquid inlet, which is arranged on the upper left side of the evaporation kettle;

[0008] A liquid outlet, which is arranged at the bottom of the evaporation kettle;

[0009] An installation port, which is arranged on the lower right side of the evaporation kettle;

[0010] An evaporation port, which is arranged at the top of the evaporation kettle;

[0011] A heat exchange pipeline, which is installed at the installation port;

[0012] A blocking mechanism, which is arranged inside the evaporation kettle and is used to temporarily block the original liquid entering the evaporation kettle to facilitate continuous extraction.

[0013] Further, the blocking mechanism includes:

[0014] A first mounting rack, which is installed inside the evaporation kettle;

[0015] A rotating plate, which is rotatably connected to the first mounting rack, and there are four rotating plates in total;

[0016] Hydraulic cylinders, two of which are installed on the upper side of the evaporation kettle.

[0017] Connecting ring, which is installed between the telescopic ends of the hydraulic cylinders.

[0018] Connecting ropes, four of which are connected between the connecting ring and the rotating plate.

[0019] Furthermore, it also includes:

[0020] Stirring mechanism, which includes a driving motor installed on the top of the evaporation kettle, and the output shaft of the driving motor penetrates through the upper part of the evaporation kettle.

[0021] Second mounting bracket, which is installed in the upper part inside the evaporation kettle.

[0022] First gear, which is installed on the output shaft of the driving motor and is rotatably connected to the second mounting bracket.

[0023] Rotating rod, which is rotatably connected to the second mounting bracket.

[0024] Second gear, which is installed on the upper part of the rotating rod and meshes with the first gear.

[0025] Stirring frame, which is installed at the bottom of the rotating rod and is used to stir the stock solution during the evaporation and heating process.

[0026] Furthermore, it also includes a leakage prevention mechanism, which includes:

[0027] Third mounting bracket, which is installed in the lower part inside the evaporation kettle.

[0028] Contact frame, which is slidably arranged on the stirring frame. <()

[0029] Spring, which is arranged between the contact frame and the third mounting bracket and is sleeved on the stirring frame.

[0030] Furthermore, it also includes a scraping mechanism, which includes:

[0031] Connecting rod, which is sleeved on the lower part of the stirring frame.

[0032] Connecting frame, which is installed at the lower part of the connecting rod.

[0033] Sliding ring, which is installed between the connecting frames and is used to scrape and clean the inner wall of the lower part inside the evaporation kettle.

[0034] Furthermore, it further includes a protection mechanism, and the protection mechanism includes:

[0035] Protection frames, there are two protection frames in total, and the protection frames are installed in the middle of the evaporation kettle;

[0036] Fasteners, and the fasteners are installed between the protection frames.

[0037] Furthermore, it further includes a collection mechanism, and the collection mechanism includes:

[0038] Closures, the closures are installed on the top of the evaporation kettle, there are two closures in total, and the closures are all slidably connected to the adjacent connecting ropes;

[0039] Water accumulation troughs, the water accumulation troughs are installed on the closures, and the water accumulation troughs are used for collecting the cooled water.

[0040] Furthermore, the heat exchange pipeline is connected to the evaporation kettle in a penetrating manner.

[0041] Furthermore, the contact frame is in a cross-shaped structure and is used to block the gap between the rotating plates.

[0042] Furthermore, the protection frame and the evaporation kettle are in a detachable connection structure.

[0043] By adopting the above technical solutions, compared with the prior art, the present invention has the following advantages:

[0044] 1. The intermittent continuous feeding of the stock solution is realized by the blocking mechanism composed of four rotating plates controlled by a hydraulic cylinder. During operation, a temporary liquid storage area can be formed when the rotating plates are horizontally closed, ensuring the stable liquid level in the evaporation kettle, avoiding uneven concentration caused by direct discharge, and the hydraulic drive cooperates with the connecting rope to realize the rotation and opening / closing, making the discharge flow rate of the concentrated liquid controllable.

[0045] 2. The present invention has remarkable comprehensive performance by integrating leak prevention, scraping, protection and collection mechanisms. The elastic sealing design of the cross-shaped contact frame and the spring realizes dynamic leak prevention. At the same time, the stirring frame drives the sliding ring to automatically scrape the scale on the inner wall, and the heat transfer efficiency is kept stable for a long time. Description of the Drawings

[0046] Figure 1 It is a three-dimensional structure schematic diagram of the present invention.

[0047] Figure 2 It is a partial cross-sectional three-dimensional structure schematic diagram of the present invention.

[0048] Figure 3 It is a partial cross-sectional three-dimensional structure schematic diagram of the blocking mechanism of the present invention.

[0049] Figure 4 This is a partial three-dimensional structural schematic diagram of the barrier mechanism of the present invention.

[0050] Figure 5 This is a partial sectional three-dimensional structural schematic diagram of the stirring mechanism of the present invention.

[0051] Figure 6 This is a partial sectional three-dimensional structural schematic diagram of the leak-proof mechanism of the present invention.

[0052] Figure 7 This is a partial sectional three-dimensional structural schematic diagram of the scraping mechanism of the present invention.

[0053] Figure 8 This is a three-dimensional structural schematic diagram of the protection mechanism of the present invention.

[0054] Figure 9 This is the first partial sectional three-dimensional structural schematic diagram of the collection mechanism of the present invention.

[0055] Figure 10 This is the second partial sectional three-dimensional structural schematic diagram of the collection mechanism of the present invention.

[0056] Reference numerals in the drawings: 1, evaporation kettle; 11, liquid inlet; 12, liquid outlet; 13, mounting port; 14, evaporation port; 2, heat exchange pipeline; 3, barrier mechanism; 31, first mounting frame; 32, rotating plate; 33, connecting ring; 34, hydraulic cylinder; 35, connecting rope; 4, stirring mechanism; 41, driving motor; 42, first gear; 43, second mounting frame; 44, rotating rod; 45, second gear; 46, stirring frame; 5, leak-proof mechanism; 51, third mounting frame; 52, contact frame; 53, spring; 6, scraping mechanism; 61, connecting rod; 62, connecting frame; 63, sliding ring; 7, protection mechanism; 71, protection frame; 72, fastener; 8, collection mechanism; 81, closing member; 82, water collecting tank. Detailed implementation manners

[0057] The technical solutions of the present invention will be further described below with reference to the accompanying drawings.

[0058] Embodiment 1

[0059] A continuous extraction device for a heat pump low-temperature concentrator, as Figures 1 - 10 shown, includes an evaporation kettle 1. The liquid inlet 11 is arranged on the upper left side of the evaporation kettle 1, the liquid outlet 12 is arranged at the bottom of the evaporation kettle 1, the mounting port 13 is arranged on the lower right side of the evaporation kettle 1, the evaporation port 14 is arranged at the top of the evaporation kettle 1, the heat exchange pipeline 2 is installed on the mounting port 13, and the heat exchange pipeline 2 is connected to the evaporation kettle 1 in a penetrating manner. The barrier mechanism 3 is arranged inside the evaporation kettle 1, and the barrier mechanism 3 is used to temporarily block the stock solution entering the evaporation kettle 1 for continuous extraction.

[0060] The barrier mechanism 3 includes a first mounting bracket 31 which is installed inside the evaporation kettle 1. A rotating plate 32 is rotatably connected to the first mounting bracket 31. There are four rotating plates 32 in total. Hydraulic cylinders 34 are installed on the upper side of the evaporation kettle 1. There are two hydraulic cylinders 34 in total. A connecting ring 33 is installed between the telescopic ends of the hydraulic cylinders 34. Connecting ropes 35 are connected between the connecting ring 33 and the rotating plates 32. There are four connecting ropes 35 in total.

[0061] It should be noted that through the synergistic effect of the barrier mechanism 3 and the heat pump circulation system, the device realizes the continuous and efficient concentration and extraction of the original liquid in a low-temperature environment. The specific process is as follows: The original liquid enters the evaporation kettle 1 from the liquid inlet 11. At this time, the four rotating plates 32 of the barrier mechanism 3 are in a horizontal closed state (maintained by the natural tension of the connecting ropes 35) when the hydraulic cylinders 34 are not started, forming a temporary liquid storage area to block the direct flow of the original liquid to the liquid outlet 12 and ensure the stable liquid level in the evaporation kettle 1. Then, the rotating plates 32 are opened, causing the original liquid to push the rotating plates 32 to open and start moving downward. At the same time, the heat pump system is started, and the low-temperature heat medium circulates in the evaporation kettle 1 through the heat exchange pipeline 2 to absorb the heat of the original liquid and make it evaporate at a low temperature (the temperature can be controlled at 40 - 60 °C) to avoid damage to heat-sensitive components. The water vapor generated by evaporation is condensed and recovered at the top. The concentrated liquid gradually sinks due to the increase in density. Then, the rotating plates 32 are closed to start receiving new original liquid. When the liquid level reaches the set height, the hydraulic cylinders 34 push the connecting ring 33 downward, and the four connecting ropes 35 synchronously pull the rotating plates 32 to turn downward (by an angle of about 30°) to open the channel and make the concentrated liquid flow out continuously from the liquid outlet 12. After the hydraulic cylinders 34 are reset, the rotating plates 32 return to the horizontal state under the action of the tension of the connecting ropes 35, blocking the newly injected original liquid again, forming a cycle of "injection - evaporation - discharge" to achieve continuous production.

[0062] Embodiment 2

[0063] On the basis of Embodiment 1, it further includes a stirring mechanism 4. The stirring mechanism 4 includes a driving motor 41 which is installed on the top of the evaporation kettle 1. The output shaft of the driving motor 41 penetrates through the upper part of the evaporation kettle 1. A second mounting bracket 43 is installed in the upper part inside the evaporation kettle 1. A first gear 42 is installed on the output shaft of the driving motor 41. The first gear 42 is rotatably connected to the second mounting bracket 43. A rotating rod 44 is rotatably connected to the second mounting bracket 43. A second gear 45 is installed on the upper part of the rotating rod 44. The second gear 45 meshes with the first gear 42. A stirring frame 46 is installed at the bottom of the rotating rod 44. The stirring frame 46 is used to stir the original liquid during the evaporation and heating process.

[0064] It should be noted that when the stock solution starts to move downward, the drive motor 41 is started. The rotation of the output shaft of the drive motor 41 will drive the first gear 42 to rotate, so that the second gear 45 drives the rotating rod 44 to rotate, and the rotating rod 44 will synchronously drive the stirring frame 46 to rotate. Stirring can, on the one hand, enhance the heat transfer efficiency and avoid local overheating; on the other hand, it can promote the renewal of the liquid surface and accelerate the evaporation of water.

[0065] It also includes a leak prevention mechanism 5. The leak prevention mechanism 5 includes a third mounting frame 51. The third mounting frame 51 is installed at the lower part inside the evaporation kettle 1. The contact frame 52 is slidably arranged on the stirring frame 46. The contact frame 52 is a cross-shaped structure and is used to block the gap between the rotating plates 32. A spring 53 is arranged between the contact frame 52 and the third mounting frame 51, and the spring 53 is sleeved on the stirring frame 46.

[0066] It should be noted that the cross-shaped structure of the contact frame 52 dynamically fills the gap between the plates when the rotating plate 32 is not opened, preventing the stock solution from leaking from the gap. As the liquid level starts to increase, the rotating plate 32 starts to open. At this time, under the action of the gravity of the stock solution, the rotating plate 32 will push the contact frame 52, causing the contact frame 52 to move downward, and the spring 53 is compressed. When the liquid level drops, the spring 53 rebounds and pushes the contact frame 52 to move up and reset. At the same time, the rotating plate 32 gradually closes with the assistance of the connecting rope 35, preparing for the next round of feeding. This process completely relies on the gravity of the stock solution to drive the opening and closing of the rotating plate 32, and realizes dynamic sealing through the elastic fitting of the contact frame 52, ensuring the automatic coordination of continuous feeding and leak prevention.

[0067] It also includes a scraping mechanism 6. The scraping mechanism 6 includes a connecting rod 61. The connecting rod 61 is sleeved on the lower part of the stirring frame 46. A connecting frame 62 is installed at the lower part of the connecting rod 61. A sliding ring 63 is installed between the connecting frames 62, and the sliding ring 63 is used to scrape and clean the inner wall of the lower part inside the evaporation kettle 1.

[0068] It should be noted that during the rotation of the stirring frame 46, the connecting rod 61 sleeved on its lower part rotates together, driving the lower connecting frame 62 and the sliding ring 63 to move in a circular motion along the inner wall of the evaporation kettle 1. The sliding ring 63 is in close contact with the inner wall of the evaporation kettle 1, and continuously scrapes the sediment or scale substances attached to the inner wall during the rotation process, preventing the accumulation of materials from affecting the heat transfer efficiency.

[0069] It also includes a protection mechanism 7. The protection mechanism 7 includes two protection frames 71. The protection frames 71 are installed in the middle of the evaporation kettle 1. The protection frames 71 are detachably connected to the evaporation kettle 1, and fasteners 72 are installed between the protection frames 71.

[0070] It further includes a collection mechanism 8. The collection mechanism 8 includes a seal 81 which is installed on the top of the evaporation kettle 1. There are two seals 81 in total, and both seals 81 are slidably connected to the adjacent connecting ropes 35. A water collecting tank 82 is installed on the seal 81, and the water collecting tank 82 is used to collect the cooled water.

[0071] It should be noted that the protection mechanism 7 is installed around the middle part of the evaporation kettle 1 through two detachable protection frames 71 and is fixedly connected by fasteners 72. This design has two functions: on the one hand, the protection frame 71 forms a physical barrier to protect the main body of the evaporation kettle 1 from external collisions or mechanical damages; on the other hand, heat insulation materials (such as rock wool or polyurethane foam) can be filled inside the protection frame 71 to effectively reduce the heat dissipation of the evaporation kettle 1 and improve the energy efficiency of the low-temperature concentration process. The detachable structure is convenient for regular maintenance or replacement of the heat insulation layer. The collection mechanism 8 realizes the sealing and diversion functions through two seals 81 at the top. The seals 81 are slidably connected to the connecting ropes 35 to ensure the normal operation of the barrier mechanism 3 while preventing steam from overflowing. After the condensed water or volatile liquid is liquefied by cooling at the top of the evaporation kettle 1, it flows along the inner wall of the seal 81 into the water collecting tank 82 below for centralized collection, which can be recycled and can also prevent the liquid from dripping and polluting the equipment or the environment.

[0072] Although the present invention has been described in detail with reference to the above embodiments, it is obvious to those skilled in the art through the present disclosure that various changes or modifications can be made to the present invention without departing from the principle and spirit scope defined by the claims. Therefore, the detailed description of the embodiments of the present disclosure is only used to explain, rather than to limit the present invention, and the scope of protection is defined by the content of the claims.

Claims

1. A continuous extraction device for a heat pump low-temperature concentrator Its characteristics include: Evaporation kettle (1); Liquid inlet (11), and the liquid inlet (11) is arranged on the upper left side of the evaporation kettle (1); Liquid outlet (12), and the liquid outlet (12) is arranged at the bottom of the evaporation kettle (1); Installation port (13), and the installation port (13) is arranged on the lower right side of the evaporation kettle (1); Evaporation port (14), and the evaporation port (14) is arranged at the top of the evaporation kettle (1); Heat exchange pipe (2), and the heat exchange pipe (2) is installed at the installation port (13); Blocking mechanism (3), which is arranged inside the evaporation kettle (1), and the blocking mechanism (3) is used to temporarily block the stock solution entering the evaporation kettle (1) to facilitate continuous extraction.

2. The continuous extraction device of a heat pump low-temperature concentrator according to claim 1, characterized in that: The blocking mechanism (3) includes: First mounting frame (31), and the first mounting frame (31) is installed inside the evaporation kettle (1); Rotating plate (32), the rotating plate (32) is rotatably connected to the first mounting frame (31), and there are four rotating plates (32) in total; Hydraulic cylinders (34), and the hydraulic cylinders (34) are installed on the upper side of the evaporation kettle (1), and there are two hydraulic cylinders (34) in total; Connecting ring (33), and the connecting ring (33) is installed between the telescopic ends of the hydraulic cylinders (34); Connecting ropes (35), and the connecting ropes (35) are connected between the connecting ring (33) and the rotating plate (32), and there are four connecting ropes (35) in total.

3. The continuous extraction device of a heat pump low-temperature concentrator according to claim 2, characterized in that: It also includes: Stirring mechanism (4), the stirring mechanism (4) includes a driving motor (41), the driving motor (41) is installed on the top of the evaporation kettle (1), and the output shaft of the driving motor (41) penetrates through the upper part of the evaporation kettle (1); Second mounting frame (43), and the second mounting frame (43) is installed in the upper part inside the evaporation kettle (1); First gear (42), and the first gear (42) is installed on the output shaft of the driving motor (41), The first gear (42) is rotatably connected to the second mounting frame (43); Rotating rod (44), and the rotating rod (44) is rotatably connected to the second mounting frame (43); Second gear (45), and the second gear (45) is installed on the upper part of the rotating rod (44), and the second gear (45) meshes with the first gear (42); Stirring frame (46), and the stirring frame (46) is installed at the bottom of the rotating rod (44), and the stirring frame (46) is used to stir the stock solution during the evaporation and heating process.

4. The continuous extraction device of a heat pump low-temperature concentrator according to claim 3, characterized in that: It also includes a leak prevention mechanism (5), and the leak prevention mechanism (5) includes: Third mounting frame (51), and the third mounting frame (51) is installed in the lower part inside the evaporation kettle (1); Contact frame (52), and the contact frame (52) is slidably arranged on the stirring frame (46); Spring (53), and the spring (53) is arranged between the contact frame (52) and the third mounting frame (51), and the spring (53) is sleeved on the stirring frame (46).

5. The continuous extraction device of a heat pump low-temperature concentrator according to claim 4, characterized in that: It further includes a scraping mechanism (6), and the scraping mechanism (6) includes: a connecting rod (61), and the connecting rod (61) is sleeved on the lower part of the stirring frame (46); a connecting frame (62), and the connecting frame (62) is installed on the lower part of the connecting rod (61); a sliding ring (63), and the sliding ring (63) is installed between the connecting frames (62), and the sliding ring (63) is used for scraping and cleaning the inner wall of the lower part in the evaporation kettle (1).

6. The continuous extraction device of a heat pump low-temperature concentrator according to claim 5, characterized in that: It further includes a protection mechanism (7), and the protection mechanism (7) includes: protection frames (71), there are two protection frames (71) in total, and the protection frames (71) are installed in the middle of the evaporation kettle (1); fasteners (72), and the fasteners (72) are installed between the protection frames (71).

7. The continuous extraction device of a heat pump low-temperature concentrator according to claim 6, characterized in that: It further includes a collection mechanism (8), and the collection mechanism (8) includes: sealing members (81), the sealing members (81) are installed on the top of the evaporation kettle (1), there are two sealing members (81) in total, and the sealing members (81) are all slidably connected to the adjacent connecting ropes (35); a water accumulation tank (82), and the water accumulation tank (82) is installed on the sealing member (81), and the water accumulation tank (82) is used for collecting the cooled water.

8. The continuous extraction device of a heat pump low-temperature concentrator according to claim 1, characterized in that: The heat exchange pipe (2) is connected to the evaporation kettle (1) in a penetrating manner.

9. The continuous extraction device of a heat pump low-temperature concentrator according to claim 4, characterized in that: The contact frame (52) is in a cross-shaped structure and is used to block the gap between the rotating plates (32).

10. The continuous extraction device of a heat pump low-temperature concentrator according to claim 6, characterized in that: The protection frame (71) and the evaporation kettle (1) are in a detachable connection structure.

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