Double-effect circulating anti-blocking concentrator

Abstract

The double-effect circulating anti-blocking concentrator comprises a first-effect evaporation tank, a first-effect concentration tank, a second-effect evaporation tank and a second-effect concentration tank, the first-effect evaporation tank is provided with a feeding pipe and a steam inlet pipe, the upper portion of the second-effect concentration tank is provided with a steam outlet pipe, the bottom of the second-effect concentration tank is provided with a discharging pipe, and the first-effect concentration tank and the second-effect concentration tank are each provided with an anti-blocking structure. The anti-blocking structure comprises motors arranged at the tops of the first-effect concentration tank and the second-effect concentration tank, transmission shafts of the motors are inserted into the first-effect concentration tank and the second-effect concentration tank and connected with rotating shafts, the rotating shafts extend to the lower portions of the first-effect concentration tank and the second-effect concentration tank, and the lower portions of the first-effect concentration tank and the second-effect concentration tank are in an inverted cone shape. A plurality of groups of stirring rods are arranged at the lower part of the rotating shaft, and the outer ends of each group of stirring rods are connected with scrapers propped against the inner walls of the lower parts of the first-effect concentration tank and the second-effect concentration tank. When the scraper of the concentrator rotates, feed liquid remained at the bottoms of the first-effect concentration tank and the second-effect concentration tank can be scraped, so that the feed liquid is effectively prevented from being remained and accumulated, and the blockage is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of concentration equipment, in particular to a double-effect circulation anti-blocking concentrator. Background Art

[0002] The double-effect concentrator is suitable for low-temperature vacuum concentration of heat-sensitive materials such as traditional Chinese medicine, western medicine, glucose, winemaking, starch, oral liquid, chemical industry, food, monosodium glutamate, dairy products, etc. For example, the Chinese utility model patent with application number CN202510049666.4 discloses a double-effect vacuum concentration device, including a feed pipe, the outside of the feed pipe is connected to a first-effect circulation pipe, the outside of the first-effect circulation pipe is provided with a first-effect heater, the side of the first-effect circulation pipe away from the first-effect heater is provided with a first-effect evaporation chamber, the outside of the first-effect heater is provided with a first-effect upper pipe box outlet, the first-effect upper pipe box outlet is connected to the first-effect evaporation chamber, the outside of the first-effect evaporation chamber is provided with a first-effect inlet pipe and a first-effect inlet condenser, the side of the first-effect inlet pipe away from the first-effect evaporation chamber is connected with a second-effect heater, and the first-effect inlet condenser is away from the first-effect A heat exchanger is connected to one side of the evaporation chamber; a second-effect circulation pipe is provided below the second-effect heater, and the side of the second-effect circulation pipe away from the second-effect heater is connected to the second-effect evaporation chamber. A second-effect upper pipe box outlet is provided outside the second-effect heater, and the second-effect upper pipe box outlet is connected to the second-effect evaporation chamber. A second-effect condenser inlet is provided outside the second-effect evaporation chamber, and the side of the second-effect condenser inlet is connected to the heat exchanger away from the second-effect evaporation chamber. The second-effect condenser inlet is connected to the second-effect heater via a pipe, and the second-effect heater is connected to the collection tank via a pipe. A liquid receiving tank is provided below the heat exchanger, and the liquid receiving tank is connected to a water ring vacuum pump. Existing double-effect concentrators often retain liquid at the bottom of the concentrator tank during actual use. Over time, the amount of residual liquid increases, which can easily cause blockage. Utility Model Content

[0003] In view of the shortcomings of the background technology, the technical problem to be solved by the present invention is to provide a double-effect circulation anti-blocking concentrator that can avoid blockage.

[0004] To this end, the present invention is achieved by adopting the following technical solutions:

[0005] A double-effect circulation anti-blocking concentrator comprises a first-effect evaporation tank, a first-effect concentration tank, a second-effect evaporation tank and a second-effect concentration tank arranged in sequence from left to right. The first-effect evaporation tank is provided with a feed pipe and a steam inlet pipe. A first liquid feed pipe and a first steam reuse pipe are provided between the first-effect evaporation tank and the first-effect concentration tank. A second liquid feed pipe and a second steam reuse pipe are provided between the first-effect concentration tank and the second-effect evaporation tank. A third liquid feed pipe and a third steam reuse pipe are provided between the second-effect evaporation tank and the second-effect concentration tank. A steam outlet pipe is provided on the top of the second-effect concentration tank and a The discharge pipe is characterized in that: the first-effect concentration tank and the second-effect concentration tank are both provided with an anti-blocking structure, and the anti-blocking structure includes a motor arranged at the top of the first-effect concentration tank and the second-effect concentration tank, and the drive shaft of the motor is inserted into the first-effect concentration tank and the second-effect concentration tank, and the drive shaft is connected to a rotating shaft, and the rotating shaft extends to the lower part of the first-effect concentration tank and the second-effect concentration tank. The lower part of the first-effect concentration tank and the second-effect concentration tank is in an inverted cone shape, and a plurality of groups of stirring rods are provided at the lower part of the rotating shaft, and the outer end of each group of stirring rods is connected to a scraper that presses against the inner wall of the lower part of the first-effect concentration tank and the second-effect concentration tank.

[0006] Furthermore, a plurality of groups of stirring rods are welded to the outer ring of the rotating shaft in equal parts of the circumference, each group of stirring rods includes an upper rod and a lower rod, and the scraper is welded to the outer ends of the upper rod and the lower rod.

[0007] Furthermore, a diverter plate is sleeved on the upper part of the rotating shaft, the outer edge of the diverter plate is close to the inner wall of the first-effect concentration tank and the second-effect concentration tank, and a plurality of diverter holes are arranged on the diverter plate from the inside to the outside.

[0008] Furthermore, the diverter hole is inclined outward from top to bottom, and is arc-shaped, and the arc length of the diverter hole gradually increases from the inner circle to the outer circle.

[0009] Furthermore, a sleeve is sleeved on the middle part of the rotating shaft, a defoaming plate is provided on the sleeve, and a plurality of rows and columns of defoaming spikes are provided on the defoaming plate.

[0010] Furthermore, the sleeve includes symmetrically arranged half sleeves, and the two half sleeves are sleeved on the rotating shaft to form a sleeve. Flat plates are provided on the left and right sides of the half sleeves, and the flat plates on the same side of the two half sleeves are provided with multiple mutually aligned mounting holes. One side of the defoaming plate is clamped between the two flat plates on the same side of the half sleeve, and the defoaming plate is provided with a through hole aligned with the mounting hole. The mounting hole is penetrated by a bolt passing through the through hole, and a nut is screwed on the other end of the bolt. The defoaming plate and the two half sleeves are fastened to the rotating shaft by the bolts and nuts.

[0011] Furthermore, one end of the first liquid feed conveying pipe is connected to the lower part of the first-effect evaporation tank, and the other end is connected to the upper part of the first-effect concentration tank. The first liquid feed conveying pipe extends into the first-effect concentration tank and is located above the middle of the diverter disk, and the first liquid feed conveying pipe is provided with a first pump. One end of the second liquid feed conveying pipe is connected to the bottom of the first-effect concentration tank, and the other end is connected to the upper part of the second-effect evaporation tank, and the second liquid feed conveying pipe is provided with a second pump. One end of the third liquid feed conveying pipe is connected to the lower part of the second-effect evaporation tank, and the other end is connected to the upper part of the second-effect concentration tank. The third liquid feed conveying pipe extends into the second-effect concentration tank and is located above the middle of the diverter disk, and the third liquid feed conveying pipe is provided with a third pump. The first-effect evaporation tank, the first-effect concentration tank, the second-effect evaporation tank and the second-effect concentration tank are all provided with condensed water pipes.

[0012] Furthermore, the second liquid feed pipe is provided with a first circulation pipe connected to the feed pipe, the first circulation pipe is provided with a fourth pump, the discharge pipe is provided with a second circulation pipe connected to the second liquid feed pipe, the second circulation pipe is provided with a fifth pump, and the discharge pipe is provided with a discharge pump.

[0013] After adopting the above technical solution, when the concentration work is carried out, the motor is turned on to drive the rotating shaft to rotate, and the rotating shaft drives the stirring rod and the scraper to rotate. Since the scraper is against the lower inner wall of the first-effect concentration tank and the second-effect concentration tank (inverted cone shape), the scraper will scrape off the liquid remaining at the bottom of the first-effect concentration tank and the second-effect concentration tank when it rotates, effectively preventing the liquid from remaining and accumulating at the bottom of the first-effect concentration tank and the second-effect concentration tank, thereby avoiding blockage. On the one hand, the stirring rod can stir the liquid at the bottom of the first-effect concentration tank and the second-effect concentration tank when it rotates, making the liquid move, avoiding the liquid from being static and more likely to remain at the bottom of the first-effect concentration tank and the second-effect concentration tank; on the other hand, it serves as a connecting structure between the scraper and the rotating shaft, thus serving two purposes. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model has the following drawings:

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of a single-effect concentration tank in the present utility model;

[0017] Figure 3 It is a top view of the diverter plate in the utility model;

[0018] Figure 4 for Figure 3 Middle AA section view;

[0019] Figure 5 This is a top view of the sleeve and the defoaming plate in the present invention (the mounting hole and the through hole are shown by dotted lines).

[0020] Reference numerals: 1, first-effect evaporator; 2, first-effect concentrator; 3, second-effect evaporator; 4, second-effect concentrator; 5, feed pipe; 6, steam inlet pipe; 7, first liquid feed pipe; 8, first steam reuse pipe; 9, second liquid feed pipe; 10, second steam reuse pipe; 11, third liquid feed pipe; 12, third steam reuse pipe; 13, steam outlet pipe; 14, outlet pipe; 15, motor; 16, rotating shaft; 17, stirring rod; 18, scraper ;19. Upper rod;20. Lower rod;21. Diverter plate;22. Diverter hole;23. Sleeve;24. Defoaming plate;25. Defoaming spike;26. Half sleeve;27. Flat plate;28. Mounting hole;29. Through hole;30. Bolt;31. Nut;32. First pump;33. Second pump;34. Third pump;35. Condensate pipe;36. First circulation pipe;37. Fourth pump;38. Second circulation pipe;39. Fifth pump;40. Discharge pump. DETAILED DESCRIPTION

[0021] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the following is a detailed description of the specific implementation method, structure, characteristics and effects of the present invention in combination with the accompanying drawings and preferred embodiments.

[0022] With reference to the above-mentioned drawings, the utility model provides a double-effect circulation anti-blocking concentrator, which includes a first-effect evaporation tank 1, a first-effect concentration tank 2, a second-effect evaporation tank 3 and a second-effect concentration tank 4, which are arranged in sequence from left to right. The first-effect evaporation tank 1 is provided with a feed pipe 5 and a steam inlet pipe 6. A first liquid feed pipe 7 and a first steam reuse pipe 8 are provided between the first-effect evaporation tank 1 and the first-effect concentration tank 2. A second liquid feed pipe 9 and a second steam reuse pipe 10 are provided between the first-effect concentration tank 2 and the second-effect evaporation tank 3. A third liquid feed pipe 11 and a third steam reuse pipe 12 are provided between the second-effect evaporation tank 3 and the second-effect concentration tank 4. A steam outlet pipe 13 is provided on the top of the second-effect concentration tank 4 and a discharge pipe 14 is provided on the bottom. The utility model is characterized in that: the first-effect concentration tank 2 and the second-effect concentration tank 4 are both provided with anti-blocking The anti-blocking structure includes a motor 15 provided on the top of the first-effect concentration tank 2 and the second-effect concentration tank 4, a transmission shaft of the motor 15 is inserted into the first-effect concentration tank 2 and the second-effect concentration tank 4, and the transmission shaft is connected with a rotating shaft 16, which extends to the lower part of the first-effect concentration tank 2 and the second-effect concentration tank 4. The lower part of the first-effect concentration tank 2 and the second-effect concentration tank 4 is in an inverted cone shape, and a plurality of groups of stirring rods 17 are provided at the lower part of the rotating shaft 16. The outer end of each group of stirring rods 17 is connected with a scraper 18 that rests on the inner wall of the lower part of the first-effect concentration tank 2 and the second-effect concentration tank 4. The plurality of groups of stirring rods 17 are welded to the outer ring of the rotating shaft 16 in equal parts of the circumference, and each group of stirring rods 17 includes an upper rod 19 and a lower rod 20. The scraper 18 is welded to the outer ends of the upper rod 19 and the lower rod 20. The upper sleeve of the rotating shaft 16 A diverter disc 21 is provided, the outer edge of the diverter disc 21 is close to the inner wall of the first-effect concentration tank 2 and the second-effect concentration tank 4, and a plurality of circles of diverter holes 22 are provided on the diverter disc 21 from the inside to the outside, the diverter holes 22 are inclined outward from top to bottom, the diverter holes 22 are arc-shaped, and the arc length of the diverter holes 22 gradually increases from the inner circle to the outer circle, the middle part of the rotating shaft 16 is sleeved with a sleeve 23, a defoaming plate 24 is provided on the sleeve 23, and a plurality of rows and columns of defoaming spikes 25 are provided on the defoaming plate 24, the sleeve 23 includes a symmetrically arranged half sleeve 26, the two half sleeves 26 are sleeved on the rotating shaft 16 to form the sleeve 23, and a flat plate 27 is provided on the left and right sides of the half sleeve 26, and a plurality of mutually aligned mounting holes 28 are provided on the flat plates 27 on the same side of the two half sleeves 26, and one side of the defoaming plate 24 is clamped in the half sleeve. The sleeve 26 is located between the two flat plates 27 on the same side of the sleeve 26, and the defoaming plate 24 is provided with a through hole 29 aligned with the mounting hole 28. The mounting hole 28 is penetrated by a bolt 30 passing through the through hole 29, and the other end of the bolt 30 is screwed with a nut 31. The defoaming plate 24 and the two half sleeves 26 are fastened to the rotating shaft 16 by the bolts 30 and nuts 31. One end of the first liquid delivery pipe 7 is connected to the lower part of the first-effect evaporation tank 1 and the other end is connected to the upper part of the first-effect concentration tank 2. The first liquid delivery pipe 7 extends into the first-effect concentration tank 2 and is located above the middle of the diverter plate 21. The first liquid delivery pipe 7 is provided with a first pump 32. The second liquid delivery pipe 9 is provided with a second pump 33.One end of the third liquid delivery pipe 11 is connected to the lower portion of the second-effect evaporator 3 and the other end is connected to the upper portion of the second-effect concentrator 4. The third liquid delivery pipe 11 extends into the second-effect concentrator 4 and is located above the middle portion of the diverter disk 21. A third pump 34 is provided on the third liquid delivery pipe 11. The first-effect evaporator 1, the first-effect concentrator 2, the second-effect evaporator 3, and the second-effect concentrator 4 are all provided with a condensate pipe 35. The second liquid delivery pipe 9 is provided with a first circulation pipe 36 that communicates with the feed pipe 5. A fourth pump 37 is provided on the first circulation pipe 36. The discharge pipe 14 is provided with a second circulation pipe 38 that communicates with the second liquid delivery pipe 9. A fifth pump 39 is provided on the second circulation pipe 38. The discharge pipe 14 is provided with a discharge pump 40.

[0023] In this embodiment, when the concentration operation is carried out, the motor 15 is turned on to drive the rotating shaft 16 to rotate, and the rotating shaft 16 drives the stirring rod 17 and the scraper 18 to rotate. Since the scraper 18 is against the lower inner wall of the first-effect concentration tank 2 and the second-effect concentration tank 4 (inverted cone shape), the scraper 18 will scrape off the liquid remaining at the bottom of the first-effect concentration tank 2 and the second-effect concentration tank 4 when rotating, effectively preventing the liquid from remaining and accumulating at the bottom of the first-effect concentration tank 2 and the second-effect concentration tank 4, thereby preventing blockage. On the one hand, the stirring rod 17 can stir the liquid at the bottom of the first-effect concentration tank 2 and the second-effect concentration tank 4 when rotating, so that the liquid moves, preventing the liquid from being stagnant and more likely to remain at the bottom of the first-effect concentration tank 2 and the second-effect concentration tank 4. On the other hand, it serves as a connecting structure between the scraper 18 and the rotating shaft 16, serving two purposes in one. Each set of stirring rods 17 includes an upper rod 19 and a lower rod 20, so that the connection structure between the scraper 18 and the rotating shaft 16 is stable and firm.

[0024] When the first liquid delivery pipe 7 and the third liquid delivery pipe 11 deliver the liquid, the liquid falls on the diverter plate 21. Since the diverter plate 21 rotates with the rotating shaft 16, part of the liquid is thrown to the middle and lower parts of the first-effect concentration tank 2 and the second-effect concentration tank 4 through the diverter hole 22, and the other part of the liquid is thrown to the inner wall of the first-effect concentration tank 2 and the second-effect concentration tank 4 due to the centrifugal force of the diverter plate 21, and then flows to the middle and lower parts of the first-effect concentration tank 2 and the second-effect concentration tank 4 due to its own weight. In this process, the liquid can form falling film evaporation on the inner wall of the middle and lower parts of the first-effect concentration tank 2 and the second-effect concentration tank 4, which greatly increases the contact area and contact time between the liquid and the steam. Compared with the prior art where the liquid directly falls to the bottom of the concentration tank through the pipeline, the concentration work efficiency is higher, the steam utilization rate is higher, and the production cost is reduced;

[0025] Since the diverter holes 22 are inclined outward from top to bottom, part of the liquid is thrown out from the diverter holes 22 in the outer circles to the inner walls of the first-effect concentration tank 2 and the second-effect concentration tank 4 to increase the contact time between the liquid and the steam. The diverter holes 22 are arc-shaped, and the arc length of the diverter holes 22 gradually increases from the inner circle to the outer circle, which facilitates the diversion of the liquid and prevents most of the liquid from accumulating on the diverter plate 21.

[0026] During operation, the falling of the liquid and the stirring of the liquid by the stirring rod 17 will generate bubbles. The rotating shaft 16 drives the defoaming plate 24 to rotate, and the multiple rows and columns of defoaming spikes 25 can puncture the bubbles to achieve the purpose of defoaming. The sleeve 23 consists of two half sleeves 26. One side of the defoaming plate 24 is clamped between two flat plates 27 on the same side of the half sleeve 26. The defoaming plate 24 and the two half sleeves 26 are fastened to the rotating shaft 16 by bolts 30 and nuts 31. The position of the defoaming plate 24 on the rotating shaft 16 can be adjusted to adapt to different liquid levels.

[0027] The first pump 32 is used to transport the liquid from the first-effect evaporation tank 1 to the first-effect concentration tank 2, the second pump 33 is used to transport the liquid from the first-effect concentration tank 2 to the second-effect evaporation tank 3, the third pump 34 is used to transport the liquid from the second-effect evaporation tank 3 to the second-effect concentration tank 4, the condensed water pipe 35 is used to discharge condensed water, the first circulation pipe 36 and the fourth pump 37 are used to transport the liquid from the first-effect concentration tank 2 to the first-effect evaporation tank 1 to achieve the purpose of circulation concentration, and the liquid enters the second-effect evaporation tank 3 after the concentration of the liquid in the first-effect concentration tank 2 reaches the standard. The second circulation pipe 38 and the fifth pump 39 are used to transport the liquid from the second-effect evaporation tank 3 to the second-effect evaporation tank 3, and the liquid is discharged through the discharge pipe 14 after the concentration of the liquid in the second-effect concentration tank 4 reaches the standard.

Claims

1. A double-effect circulation anti-blocking concentrator, comprising a first-effect evaporation tank, a first-effect concentration tank, a second-effect evaporation tank, and a second-effect concentration tank, arranged in sequence from left to right. The first-effect evaporation tank is provided with a feed pipe and a steam inlet pipe. A first liquid feed pipe and a first steam reuse pipe are provided between the first-effect evaporation tank and the first-effect concentration tank. A second liquid feed pipe and a second steam reuse pipe are provided between the first-effect concentration tank and the second-effect evaporation tank. A third liquid feed pipe and a third steam reuse pipe are provided between the second-effect evaporation tank and the second-effect concentration tank. A steam outlet pipe is provided at the top of the second-effect concentration tank and a discharge pipe is provided at the bottom. The characteristics of the invention are as follows: The first-effect concentration tank and the second-effect concentration tank are both provided with an anti-blocking structure, which includes a motor arranged at the top of the first-effect concentration tank and the second-effect concentration tank, and a drive shaft of the motor is inserted into the first-effect concentration tank and the second-effect concentration tank. The drive shaft is connected to a rotating shaft, which extends to the lower part of the first-effect concentration tank and the second-effect concentration tank. The lower part of the first-effect concentration tank and the second-effect concentration tank is in an inverted cone shape. A plurality of groups of stirring rods are provided at the lower part of the rotating shaft, and the outer end of each group of stirring rods is connected to a scraper that presses against the inner wall of the lower part of the first-effect concentration tank and the second-effect concentration tank.

2. A double-effect circulation anti-blocking concentrator according to claim 1, characterized in that: multiple groups The stirring rods are welded to the outer ring of the rotating shaft in equal parts of the circumference. Each group of stirring rods includes an upper rod and a lower rod. The scrapers are welded to the outer ends of the upper rod and the lower rod.

3. A double-effect circulation anti-blocking concentrator according to claim 1 or 2, characterized in that: A diverter plate is sleeved on the upper part of the rotating shaft, the outer edge of the diverter plate is close to the inner wall of the first-effect concentration tank and the second-effect concentration tank, and a plurality of diverter holes are arranged on the diverter plate from the inside to the outside.

4. The double-effect circulation anti-blocking concentrator according to claim 3 is characterized in that: The diversion hole is inclined outward from top to bottom, and is arc-shaped, and the arc length of the diversion hole gradually increases from the inner circle to the outer circle.

5. A double-effect circulation anti-blocking concentrator according to claim 1 or 2, characterized in that: A sleeve is sleeved on the middle part of the rotating shaft, a defoaming plate is provided on the sleeve, and a plurality of rows and columns of defoaming spikes are provided on the defoaming plate.

6. The double-effect circulation anti-blocking concentrator according to claim 5, characterized in that: The sleeve includes symmetrically arranged half sleeves, and the two half sleeves are sleeved on the rotating shaft to form a sleeve. Flat plates are provided on the left and right sides of the half sleeves. The flat plates on the same side of the two half sleeves are provided with multiple mounting holes aligned with each other. One side of the defoaming plate is clamped between the two flat plates on the same side of the half sleeve, and the defoaming plate is provided with a through hole aligned with the mounting hole. The mounting hole is penetrated by a bolt passing through the through hole, and a nut is screwed on the other end of the bolt. The defoaming plate and the two half sleeves are fastened to the rotating shaft by the bolts and nuts.

7. The double-effect circulation anti-blocking concentrator according to claim 3 is characterized by: One end of the first liquid feed conveying pipe is connected to the lower part of the first-effect evaporation tank, and the other end is connected to the upper part of the first-effect concentration tank. The first liquid feed conveying pipe extends into the first-effect concentration tank and is located above the middle of the diverter disk, and the first liquid feed conveying pipe is provided with a first pump. One end of the second liquid feed conveying pipe is connected to the bottom of the first-effect concentration tank, and the other end is connected to the upper part of the second-effect evaporation tank, and the second liquid feed conveying pipe is provided with a second pump. One end of the third liquid feed conveying pipe is connected to the lower part of the second-effect evaporation tank, and the other end is connected to the upper part of the second-effect concentration tank. The third liquid feed conveying pipe extends into the second-effect concentration tank and is located above the middle of the diverter disk, and the third liquid feed conveying pipe is provided with a third pump. The first-effect evaporation tank, the first-effect concentration tank, the second-effect evaporation tank and the second-effect concentration tank are all provided with condensed water pipes.

8. The double-effect circulation anti-blocking concentrator according to claim 7, characterized in that: The second liquid feed pipe is provided with a first circulation pipe communicating with the feed pipe, the first circulation pipe is provided with a fourth pump, the discharge pipe is provided with a second circulation pipe communicating with the second liquid feed pipe, the second circulation pipe is provided with a fifth pump, and the discharge pipe is provided with a discharge pump.

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