A single-effect concentrator

Abstract

This utility model discloses a single-effect concentrator, including a jacketed heat exchanger, an evaporation chamber, a demister, a first separator, a condenser, a cooler, a separator, and a storage tank. The jacketed heat exchanger includes a cylinder, a jacket, a nozzle, an impeller, a stirring rod, an air inlet, and an air outlet. The outer side and lower end of the cylinder are enclosed by the jacket, and the lower end of the cylinder has a discharge port. The beneficial effects of this utility model are: live steam enters the jacket through the air inlet, heats the liquid in the heating chamber, and then flows out from the air outlet into the nozzle. Due to the pressure difference on both sides of the nozzle, the live steam is rapidly ejected from the nozzle, causing the impeller to rotate. The thermal energy of the live steam is converted into kinetic energy, improving the heat utilization rate. This drives the stirring rod to stir the liquid, increasing the liquid flow rate, ensuring uniform heating, and improving the heat transfer efficiency and concentration efficiency.

Description

Technical Field

[0001] This utility model relates to the field of pharmaceutical machinery and equipment technology, and in particular to a single-effect concentrator. Background Technology

[0002] Single-effect concentrators are used in the pharmaceutical, chemical, and wastewater treatment industries for vacuum concentration processes involving small batches and a wide variety of products. They utilize a combination of external heating, natural circulation, and vacuum negative pressure evaporation to evaporate and concentrate the solution, separating the solvent from the solution.

[0003] The patent document with publication number CN105013199B discloses a single-effect external circulation concentrator and its application. The concentrator uses live steam to enter a jacketed heat exchanger, which heats the liquid and raises it. The liquid is then sprayed into the evaporation chamber through a nozzle. The liquid is separated into gas and liquid by a separator. The liquid then returns to the lower part of the jacketed heat exchanger through a circulation pipe for reheating. After being heated, the liquid is sprayed back into the evaporation chamber to form a circulation. The steam is cooled into liquid by a condenser and a cooler and finally flows into a receiving container for storage.

[0004] However, in the above-mentioned single-effect concentrator, the feed liquid is heated by a heater installed in the interlayer of the outer wall of the heating chamber. The feed liquid near the heating chamber is heated quickly, while the feed liquid in the middle and bottom positions is heated slowly. This results in uneven heating of the feed liquid, which in turn affects the concentration efficiency of the feed liquid and the heat transfer efficiency is low. At the same time, after the live steam heats the heating chamber, a large amount of waste heat is not reused, resulting in low heat utilization rate and increased production costs for enterprises. Utility Model Content

[0005] In view of the above-mentioned prior art, the present invention provides a single-effect concentrator to solve the problems existing in the background art.

[0006] To achieve the above objectives, the technical solution of this utility model embodiment is implemented as follows:

[0007] A single-effect concentrator includes a jacketed heat exchanger, an evaporation chamber, a demister, a first separator, a condenser, a cooler, a second separator, a storage tank, and support legs. The jacketed heat exchanger includes a cylinder, a jacket, a nozzle, an impeller, a stirring rod, an inlet, and an outlet. The outer side and lower end of the cylinder are enclosed by the jacket, and a discharge port is provided at the lower end of the cylinder. The inlet and outlet are located on the same horizontal plane on the upper part of the outer side of the jacket. The inlet is equipped with a steam regulating valve. The outlet is fixedly connected to the nozzle via a first pipe. The nozzle is located above the cylinder, and the airflow from the nozzle blows onto the blades of the impeller. The impeller is located below the nozzle and fixedly connected to the stirring rod. The stirring rod is rotatably connected to the upper part of the inner wall of the cylinder. The side of the evaporation chamber is connected to the jacketed heat exchanger. The evaporation chamber is connected via an inlet pipe to the bottom of a jacketed heat exchanger via a circulation pipe. An inlet is located on the side of the evaporation chamber. A thermometer is located at the bottom of the evaporation chamber. The top of the evaporation chamber is fixedly connected to the demister. The evaporation chamber is connected to the first separator via a second pipe. The lower end of the first separator is fixedly connected to a return pipe and also connected to the evaporation chamber via the return pipe. The first separator is connected to the condenser via a third pipe. The lower end of the condenser is fixedly connected to the cooler. The lower end of the cooler is fixedly connected to the second separator. The second separator has a vacuum port and a first exhaust port. The lower end of the second separator is fixedly connected to the storage tank. Support legs are located at the bottom of the jacketed heat exchanger, the evaporation chamber, and the storage tank.

[0008] Preferably, the device also includes a controller, wherein the steam regulating valve and the thermometer are respectively electrically connected to the controller.

[0009] Preferably, the top of the evaporation chamber is provided with a first liquid level gauge, a pressure gauge and a pressure regulating valve, and the pressure regulating valve, the first liquid level gauge and the pressure gauge are respectively electrically connected to the controller.

[0010] Preferably, the outer side of the first pipe is provided with a heat insulation layer.

[0011] Preferably, the circulation pipeline is equipped with a densitometer, which is electrically connected to the controller.

[0012] Preferably, the liquid storage tank is provided with a second vent and a second level gauge, and the second vent and the second level gauge are electrically connected to the controller.

[0013] Preferably, the evaporation chamber is provided with a cleaning port at the top.

[0014] The beneficial effects of this utility model are as follows: live steam enters the jacket through the air inlet, heats the liquid in the jacketed heat exchanger, and then flows out from the air outlet into the nozzle. Through the pressure difference on both sides of the nozzle, the live steam is quickly ejected from the nozzle, causing the impeller to rotate. The heat energy of the live steam is converted into kinetic energy, which improves the heat utilization rate. It drives the stirring rod to stir the liquid, which increases the flow rate of the liquid, makes the heating more uniform, and improves the heat transfer efficiency and concentration efficiency. Attached Figure Description

[0015] Figure 1 is a schematic diagram of the structure of a single-effect concentrator in an embodiment of this application;

[0016] Figure 2 is an enlarged schematic diagram of the impeller and nozzle at point A in an embodiment of this application;

[0017] Figure 3 is a schematic diagram of the demister structure in an embodiment of this application;

[0018] Explanation of icon numbers:

[0019] 1. Jacketed heat exchanger; 101. Shell; 102. Jacket; 103. Nozzle; 104. Impeller; 1041. Blade; 105. Stirring rod; 106. Air inlet; 107. Air outlet; 108. Material outlet; 2. Evaporation chamber; 3. Demister; 4. First separator; 5. Condenser; 6. Cooler; 7. Second separator; 8. Liquid storage tank; 9. Support leg; 10. Steam regulating valve; 11. First pipeline; 12. Liquid inlet pipeline; 13. Circulation pipeline; 14. Material inlet; 15. Thermometer; 16. Second pipeline; 17. Return pipeline; 18. Third pipeline; 19. Vacuum port; 20. First exhaust port; 21. First level gauge; 22. Pressure gauge; 23. Pressure regulating valve; 24. Densitometer; 25. Second exhaust port; 26. Second level gauge; 27. Cleaning port. Detailed Implementation

[0020] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in this specification of this utility model is for the purpose of describing particular embodiments only and is not intended to limit the utility model. In the following description, the expression "some embodiments" refers to a subset of all possible embodiments; however, it should be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments and can be combined with each other without conflict.

[0021] It should also be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "inner," "outer," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0022] Example 1

[0023] Referring to Figures 1-3, this application provides a single-effect concentrator, including a jacketed heat exchanger 1, an evaporation chamber 2, a demister 3, a first separator 4, a condenser 5, a cooler 6, a second separator 7, a storage tank 8, and support legs 9. The jacketed heat exchanger 1 includes a cylinder 101, a jacket 102, a nozzle 103, an impeller 104, a stirring rod 105, an air inlet 106, and an air outlet 107. The outer side and lower end of the cylinder 101 are wrapped by the jacket 102, and the lower end of the cylinder 101 is provided with a discharge port 108. The upper part of the outer side of the jacket 102 is provided with the air inlet 106 and the air outlet 107 on the same horizontal plane. The air inlet 106 is provided with a steam regulating valve 10. The air outlet 107 is fixedly connected to the nozzle 103 through a first pipe 11. The nozzle 103 is located above the cylinder 101. The airflow blows towards the blades 1041 of the impeller 104. The impeller 104 is located below the nozzle 103 and is fixedly connected to the stirring rod 105. The stirring rod 105 is rotatably connected to the upper part of the inner wall of the cylinder 101. The side of the evaporation chamber 2 is connected to the jacketed heat exchanger 1 through the liquid inlet pipe 12. The bottom end of the evaporation chamber 2 is connected to the jacketed heat exchanger 1 through the circulation pipe 13. The side of the evaporation chamber 2 is provided with a feed inlet 14. The top end of the evaporation chamber 2 is fixedly connected to the demister 3. The evaporation chamber 2 is connected to the first separator 4 through the second pipe 16. The lower end of the first separator 4 is fixedly connected to the return pipe 17 and is connected to the evaporation chamber 2 through the return pipe 17. The first separator 4 is connected to the condenser 5 through the third pipe 18. The lower end of the condenser 5 is fixedly connected to the cooler 6. The lower end of the cooler 6 is connected to the second separator 7. The second separator 7 is fixedly connected to the liquid storage tank 8. The second separator 7 is provided with a vacuum port 19 and a first exhaust port 20. The lower end of the second separator 7 is fixedly connected to the liquid storage tank 8. The support leg 9 is located at the bottom of the jacketed heat exchanger 1, the evaporation chamber 2 and the liquid storage tank 8.

[0024] First, close the steam regulating valve 10 and the first exhaust port 20. Vacuum the entire device through the vacuum port 19. The liquid feed is drawn into the evaporation chamber 2 through the feed port 14 under vacuum, eliminating the need for manual feeding and reducing labor intensity and enterprise costs. Stop feeding when the liquid is visible at half the height of the observation window on the evaporation chamber 2. The liquid in the evaporation chamber 2 flows into the jacketed heat exchanger 102 through the circulation pipe 13. Open the steam regulating valve 10, and live steam enters the jacketed heat exchanger 102 through the air inlet 106 to heat the jacketed heat exchanger 1. The steam regulating valve 10 controls the amount of steam entering, thereby controlling the temperature of the liquid feed and ensuring the stability of the effective components, especially heat-sensitive and volatile components. The live steam discharged from the air outlet 107 flows through the first pipe 11 to the nozzle 103. Relying on the pressure difference across the nozzle 103, the live steam is rapidly sprayed onto the impeller 104. The impeller 104 rotates, driving the stirring rod 105. The liquid is stirred within the jacketed heat exchanger 1 to increase its flow rate, ensure uniform heating, and improve heat transfer and concentration efficiency. The heated liquid boils and rises, being ejected from the inlet pipe 12 into the evaporation chamber 2. The low-pressure environment in the evaporation chamber 2 lowers the boiling point, causing the liquid to vaporize and rise with the secondary steam into the demister 3. The demister 3 eliminates foam generated during concentration. The broken foam droplets fall to the bottom of the evaporation chamber 2 under gravity. A thermometer 15 at the bottom of the evaporation chamber 2 monitors the liquid temperature in real time. The steam regulating valve 10 is adjusted based on the thermometer's reading to prevent excessive temperature from damaging the stability of heat-sensitive and volatile components. The secondary steam enters the first separator 4 for gas-liquid separation. The separated liquid enters the evaporation chamber 2 via the return pipe 17. The gas is cooled by the condenser 5, condensing into liquid, which then enters the cooler 6 for further cooling, bringing the liquid solvent to room temperature or below for easy collection. After cooling, the liquid passes through the second separator 7. The non-condensable gas is discharged into the receiving tank. The function of the support leg 9 is to ensure the stability of the jacketed heat exchanger 1, the evaporation chamber 2 and the storage tank 8. After concentration is completed, first close the steam regulating valve 10 and the vacuum port 19, and open the first exhaust port 20. The device is restored to normal pressure, which facilitates the subsequent discharge of the concentrated liquid into the collection tank.

[0025] Furthermore, the device also includes a controller, with the steam regulating valve 10 and the thermometer 15 respectively electrically connected to the controller. Preferably, the controller is a PLC controller, which uniformly controls the opening and closing of all valves in the device, and receives and processes data from the measuring instruments in the device, thereby improving the automation level of the device, increasing work efficiency, and significantly reducing risks and costs.

[0026] Furthermore, the top of the evaporation chamber is equipped with a first level gauge 21, a pressure gauge 22, and a pressure regulating valve.

[0027] 23. The pressure regulating valve 23, the first liquid level gauge 21, and the first pressure gauge 22 are respectively electrically connected to the controller. When the first liquid level gauge 21 shows that the liquid level in the evaporation chamber 2 has reached the set value, the controller controls the closing of the feed inlet 14. This eliminates the need for manual control of the amount of liquid entering the chamber, reducing labor intensity and improving work efficiency. During the evaporation process, the pressure gauge 22 and the pressure regulating valve 23 in the evaporation chamber 2 ensure that the evaporation chamber 2 is under vacuum, thereby improving the evaporation and concentration efficiency.

[0028] Furthermore, an insulation layer is provided on the outside of the first pipe 11. After the live steam heats the jacketed heat exchanger 1, there is still a large amount of residual heat, which flows to the nozzle 103 through the first pipe 11. The insulation layer on the outside of the first pipe 11 reduces the heat loss in the live steam and improves the utilization rate of the residual heat of the live steam.

[0029] Example 2

[0030] Referring to Figures 1-3, the difference between this embodiment and the previous embodiment is that the circulation pipe 13 is equipped with a densitometer 24, which is electrically connected to the controller. During the concentration process, the densitometer 24 detects the concentrated liquid in the circulation pipe 13 every 30 minutes. When the detected density reaches the set density, the controller closes the steam regulating valve 10, discharges and collects the concentrated liquid, reducing human interference and improving concentration accuracy and quality.

[0031] Furthermore, the storage tank 8 is equipped with a second vent 25 and a second level gauge 26, which are electrically connected to the controller. When the second level gauge 26 indicates that the condensate in the storage tank 8 has reached a specified value, the controller opens the second vent 25, restoring the pressure inside the storage tank 8 to normal, facilitating the discharge of the condensate from the storage tank 8.

[0032] Furthermore, the evaporation chamber 2 is equipped with a cleaning port at the top. After the concentrated liquid is drained, cleaning agent is injected through the cleaning port at the top of the evaporation chamber 2. The vacuum port 19 is opened to evacuate the device. The steam regulating valve 10 is opened to heat the cleaning agent, allowing it to circulate and clean within the jacketed heat exchanger 102 and the evaporation chamber 2. After boiling for half an hour, the steam regulating valve 10 is closed, the first exhaust port 20 is opened to discharge the cleaning agent, and then a water pipe is connected to the cleaning port to inject process water to rinse the evaporation chamber 2 and the jacketed heat exchanger 102, achieving the cleaning purpose. The operation is simple and convenient.

[0033] The usage process of this utility model is as follows: When using this utility model, first close the steam regulating valve 10 and the first exhaust port 20. Connect the vacuum port 19 to the vacuum pump to provide a vacuum environment for the device. Under low pressure, the boiling point of the liquid decreases, and evaporation and concentration can be carried out at low temperature to avoid damaging the stability of the effective components. When the pressure gauge 22 on the evaporation chamber 2 shows that the device is under vacuum, open the feed port 14. The liquid is drawn into the evaporation chamber 2 by the vacuum. When the liquid reaches half the height of the observation window on the evaporation chamber 2 or the first liquid level gauge 21 shows that the liquid level has reached the set value, stop feeding to accurately control the amount of liquid entering and improve working efficiency. The liquid in the evaporation chamber 2 flows into the jacketed heat exchanger 1 through the circulation pipe 13. Open the steam regulating valve 10, and live steam enters the jacket 102 through the air inlet 106 to heat the jacketed heat exchanger 1. The live steam in the jacket 102 flows to the nozzle 103 through the first pipe 11 and is quickly sprayed out to the impeller 104 through the nozzle 103. On the blades 1041, the impeller 104 drives the stirring rod 105 to stir the liquid in the jacketed heat exchanger 1, making the liquid heat evenly heated, improving heat transfer efficiency and concentration efficiency. The liquid boils and rises, and is sprayed into the evaporation chamber 2 through the liquid inlet pipe 12. The pressure in the evaporation chamber 2 is regulated by the pressure regulating valve 23 to maintain a vacuum state, ensuring that the liquid can vaporize after heating, improving working efficiency. At the same time, the thermometer 15 monitors the temperature of the liquid, and the steam regulating valve 10 is adjusted according to the temperature of the thermometer 15 to avoid the temperature from being too high and damaging the stability of heat-sensitive and volatile components. The demister 3 eliminates the foam in the secondary steam. The liquid is separated by gas and liquid through the first separator 4. The liquid returns to the evaporation chamber 2 through the return pipe 17. The gas passes through the condenser 5 and the cooler 6 in sequence. The liquid solvent at the condensation point is separated by gas and liquid through the second separator 7. The liquid storage tank 8 collects the condensed liquid solvent, and the non-condensable gas is discharged. The densitometer 24 checks the circulation pipe 13 every minute. The concentrated liquid inside is tested. When the detected density reaches the set density, the controller closes the steam regulating valve 10 and discharges the concentrated liquid for collection, reducing human interference and improving the concentration accuracy and quality. After the concentrated liquid is discharged, the device is cleaned through the cleaning port to avoid contamination for the next concentration.

[0034] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. The protection scope of this utility model should be determined by the protection scope of the stated claims.

Claims

1. A single-effect concentrator, characterized in that, The system includes a jacketed heat exchanger, an evaporation chamber, a demister, a first separator, a condenser, a cooler, a second separator, a liquid storage tank, and support legs. The jacketed heat exchanger comprises a cylinder, a jacket, a nozzle, an impeller, a stirring rod, an inlet, and an outlet. The outer side and lower end of the cylinder are enclosed by the jacket, and the lower end of the cylinder has a discharge port. The upper outer surface of the jacket has the inlet and outlet on the same horizontal plane. The inlet is equipped with a steam regulating valve. The outlet is fixedly connected to the nozzle via a first pipe. The nozzle is located above the cylinder, and the airflow from the nozzle blows onto the blades of the impeller. The impeller is located below the nozzle and is fixedly connected to the stirring rod. The stirring rod is rotatably connected to the upper part of the inner wall of the cylinder. The side of the evaporation chamber is connected to the jacketed heat exchanger via a liquid inlet. The evaporation chamber is connected to the jacketed heat exchanger via a circulation pipe at its bottom. A feed inlet is located on the side of the evaporation chamber. A thermometer is located at the bottom of the evaporation chamber. The top of the evaporation chamber is fixedly connected to the demister. The evaporation chamber is connected to the first separator via a second pipe. The lower end of the first separator is fixedly connected to a return pipe and also connected to the evaporation chamber via the return pipe. The first separator is connected to the condenser via a third pipe. The lower end of the condenser is fixedly connected to the cooler. The lower end of the cooler is fixedly connected to the second separator. The second separator has a vacuum port and a first exhaust port. The lower end of the second separator is fixedly connected to the liquid storage tank. Support legs are located at the bottom of the jacketed heat exchanger, the evaporation chamber, and the liquid storage tank.

2. A single-effect concentrator according to claim 1, characterized in that, It also includes a controller, and the steam regulating valve and the thermometer are respectively electrically connected to the controller.

3. A single-effect concentrator according to claim 2, characterized in that, The top of the evaporation chamber is equipped with a first liquid level gauge, a pressure gauge, and a pressure regulating valve. The pressure regulating valve, the first liquid level gauge, and the pressure gauge are respectively connected to the controller via electrical signals.

4. A single-effect concentrator according to claim 1, characterized in that, The first pipe has an insulation layer on its outer side.

5. A single-effect concentrator according to claim 2, characterized in that, The circulation pipeline is equipped with a densitometer, which is electrically connected to the controller.

6. A single-effect concentrator according to claim 2, characterized in that, The storage tank is equipped with a second vent and a second level gauge, and the second vent and the second level gauge are electrically connected to the controller.

7. A single-effect concentrator according to claim 1, characterized in that, The evaporation chamber is equipped with a cleaning port at the top.

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