Small heat pump triple-effect vacuum falling-film concentrator

Abstract

This utility model discloses a small-scale heat pump triple-effect vacuum falling film thickener, including a frame and a control box mounted on the frame. A thickening device is located on the upper layer of the frame, a steam boiler on the middle layer, and a heat pump device on the lower layer. The steam boiler's outlet pipe is connected to the thickening device, and the heat pump device is also connected to the thickening device. A circulating pump is installed between each heat exchanger in this utility model. Material is drawn in under negative pressure, transported to the next effect by the circulating pump, and finally discharged from the outlet pump. The entire process is continuous, with a short thickening cycle, stable heat transfer, and high efficiency. Simultaneously, by incorporating the heat pump device, the sensible and latent heat of the thickener unit can be reused, maintaining a constant temperature without damaging the material properties. This results in energy saving, environmental protection, and strong stability.

Description

Technical Field

[0001] This utility model relates to the field of liquid concentration equipment technology, and in particular to a small heat pump triple-effect vacuum falling film concentrator. Background Technology

[0002] Thickeners, as concentration processing equipment, are widely used in industries such as chemical, pharmaceutical, and environmental protection. Currently, existing thickener equipment has a long concentration cycle and is not good enough in terms of energy conservation and environmental protection. Most of them use steam as a heat source to evaporate materials, which has high energy consumption and low efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a small heat pump triple-effect vacuum falling film concentrator, which effectively solves the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A small heat pump triple-effect vacuum falling film thiocyanate includes a frame and a control box mounted on the frame. A thiocyanate device is installed on the upper layer of the frame, a steam boiler is installed on the middle layer of the frame, and a heat pump device is installed on the lower layer of the frame. The steam outlet pipe of the steam boiler is connected to the thiocyanate device, and the heat pump device is connected to the thiocyanate device.

[0006] Furthermore, the concentration device includes a feed pipe, a condensate preheater, a triple-effect heat exchanger, a triple-effect circulating pump, a double-effect heat exchanger, a double-effect circulating pump, a first-effect heat exchanger, a first-effect circulating pump, and a discharge pump connected in sequence. A first-effect gas-liquid separator is connected between the lower part of the first-effect heat exchanger and the upper part of the double-effect heat exchanger. A double-effect gas-liquid separator is connected between the lower part of the double-effect heat exchanger and the upper part of the triple-effect heat exchanger. A triple-effect gas-liquid separator is connected to the lower part of the triple-effect heat exchanger. The triple-effect gas-liquid separator and the first-effect heat exchanger are respectively connected to the heat pump device. The upper part of the triple-effect heat exchanger is connected to the steam boiler. A first circulation pipe communicating with the top of the first-effect heat exchanger is provided between the first-effect circulating pump and the discharge pump. A second circulation pipe communicating with the top of the double-effect heat exchanger is provided between the double-effect circulating pump and the first-effect heat exchanger. A third circulation pipe communicating with the top of the triple-effect heat exchanger is provided between the triple-effect circulating pump and the double-effect heat exchanger.

[0007] Furthermore, a first pipe is provided between the first-effect circulating pump and the first-effect heat exchanger, which is connected to the bottom of the first-effect gas-liquid separator; a second pipe is provided between the second-effect circulating pump and the second-effect heat exchanger, which is connected to the bottom of the second-effect gas-liquid separator; and a third pipe is provided between the third-effect circulating pump and the third-effect heat exchanger, which is connected to the bottom of the third-effect gas-liquid separator.

[0008] Furthermore, the heat pump device includes a compressor, a condenser, a three-in-one gas-liquid separator, an expansion valve, and an evaporator. The evaporator is connected to the top of the three-effect gas-liquid separator, the compressor is connected to the condenser, the condenser is connected to the upper part of the single-effect heat exchanger, the lower part of the single-effect heat exchanger is connected to the liquid inlet of the three-in-one gas-liquid separator, the liquid outlet of the three-in-one gas-liquid separator is connected to the expansion valve, the expansion valve is connected to the evaporator, the evaporator is connected to the air inlet of the three-in-one gas-liquid separator, and the exhaust port of the three-in-one gas-liquid separator is connected to the compressor.

[0009] Furthermore, the concentration device is connected to a vacuum device, which includes a vacuum pump and a cooler. The lower parts of the double-effect heat exchanger and the lower parts of the triple-effect heat exchanger are respectively connected to the lower part of the evaporator through PU gas pipes. The lower part of the evaporator is connected to the upper part of the collected condensate preheater through PU gas pipes. The lower part of the collected condensate preheater is connected to the vacuum pump, and the vacuum pump is connected to the cooler.

[0010] Furthermore, the vacuum device is arranged on the lower layer of the frame.

[0011] Furthermore, the lower parts of the double-effect heat exchanger and the lower parts of the triple-effect heat exchanger are respectively connected to the evaporator via a fourth pipe.

[0012] Furthermore, the concentration device is connected to a cleaning device, which includes a cleaning pump and three cleaning balls. One end of the cleaning pump is connected to external clean water or alkaline solution, and the other end of the cleaning pump is connected to the three cleaning balls through pipes. The three cleaning balls are respectively fixed in a first-effect gas-liquid separator, a second-effect gas-liquid separator, and a third-effect gas-liquid separator.

[0013] Furthermore, the cleaning device is arranged on the lower layer of the frame.

[0014] Compared with the prior art, this utility model provides a small heat pump triple-effect vacuum falling film thiocyanate, which has the following beneficial effects:

[0015] This invention features a circulating pump between each heat exchanger. Material is drawn in under negative pressure, transported to the next effect, and finally discharged from the outlet pump. The entire process is continuous, with a short concentration cycle, stable heat transfer, and high efficiency. Simultaneously, a heat pump device is incorporated, which reuses the sensible and latent heat of the thickener unit, maintaining a constant temperature without damaging material properties. This results in energy saving, environmental friendliness, and strong stability. Furthermore, a cleaning device is installed to clean the thickener unit each time it is started and stopped, ensuring the unit remains clean and hygienic at all times. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Fig. 1 This is a three-dimensional structural diagram of the present invention from a first-view perspective;

[0018] Fig. 2 This is a three-dimensional structural diagram of the present invention from a second perspective;

[0019] Fig. 3 This is a schematic diagram of the pipeline connection of this utility model.

[0020] Attached reference numerals: 1. Frame; 2. Control box; 3. Concentrator; 31. Feed pipe; 32. Condensate preheater; 33. Triple-effect heat exchanger; 34. Triple-effect circulating pump; 35. Second-effect heat exchanger; 36. Second-effect circulating pump; 37. First-effect heat exchanger; 38. First-effect circulating pump; 39. Discharge pump; 310. First-effect gas-liquid separator; 311. Second-effect gas-liquid separator; 312. Triple-effect gas-liquid separator; 313. First circulation pipe; 14. Second circulation pipeline; 315. Third circulation pipeline; 316. First pipeline; 317. Second pipeline; 318. Third pipeline; 319. Fourth pipeline; 4. Steam boiler; 5. Heat pump unit; 51. Compressor; 52. Condenser; 53. Three-in-one gas-liquid separator; 54. Expansion valve; 55. Evaporator; 6. Vacuum device; 61. Vacuum pump; 62. Cooler; 7. Cleaning device; 71. Cleaning pump; 72. Cleaning ball. Detailed Implementation

[0021] The technical solution of this utility model will be clearly and completely described below through detailed embodiments and in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0022] Please refer to Figs. 1-3This embodiment provides a small heat pump triple-effect vacuum falling film thiocyanate, including a frame 1 and a control box 2 installed on the frame 1. A thiocyanate 3 is provided on the upper layer of the frame 1, a steam boiler 4 is provided on the middle layer of the frame 1, and a heat pump device 5 is provided on the lower layer of the frame 1. The steam outlet pipe of the steam boiler 4 is connected to the thiocyanate 3, and the heat pump device 5 is connected to the thiocyanate 3.

[0023] The concentration device 3 includes, in sequence, a feed pipe 31, a condensate preheater 32, a triple-effect heat exchanger 33, a triple-effect circulating pump 34, a double-effect heat exchanger 35, a double-effect circulating pump 36, a first-effect heat exchanger 37, a first-effect circulating pump 38, and a discharge pump 39. A first-effect gas-liquid separator 310 is connected between the lower part of the first-effect heat exchanger 37 and the upper part of the double-effect heat exchanger 35. A second-effect gas-liquid separator 311 is connected between the lower part of the double-effect heat exchanger 35 and the upper part of the triple-effect heat exchanger 33. A triple-effect gas-liquid separator 312 is connected to the lower part of the triple-effect heat exchanger 33. The liquid separator 312 and the first-effect heat exchanger 37 are respectively connected to the heat pump device 5, and the upper part of the third-effect heat exchanger 33 is connected to the steam boiler 4; a first circulation pipe 313 communicating with the top of the first-effect heat exchanger 37 is provided between the first-effect circulating pump 38 and the discharge pump 39; a second circulation pipe 314 communicating with the top of the second-effect heat exchanger 35 is provided between the second-effect circulating pump 36 and the first-effect heat exchanger 37; and a third circulation pipe 315 communicating with the top of the third-effect heat exchanger 33 is provided between the third-effect circulating pump 34 and the second-effect heat exchanger 35.

[0024] With the above structural setup, a circulation pump is installed between each heat exchanger. The material is drawn in by negative pressure, transported to the next effect by the circulation pump, and finally discharged from the discharge pump. The whole process is continuous, with a short concentration cycle, stable heat transfer, and high efficiency.

[0025] In some specific implementation methods, such as Fig. 3 As shown, a first pipe 316 connecting the first-effect circulating pump 38 and the first-effect heat exchanger 37 is provided, which communicates with the bottom of the first-effect gas-liquid separator 310; a second pipe 317 connecting the second-effect circulating pump 36 and the second-effect heat exchanger 35 is provided, which communicates with the bottom of the second-effect gas-liquid separator 311; and a third pipe 318 connecting the third-effect circulating pump 34 and the third-effect heat exchanger 33 is provided, which communicates with the bottom of the third-effect gas-liquid separator 312.

[0026] In some specific implementation methods, refer to Figs. 1-3The heat pump device 5 includes a compressor 51, a condenser 52, a three-in-one gas-liquid separator 53, an expansion valve 54, and an evaporator 55. The evaporator 55 is connected to the top of the three-in-one gas-liquid separator 53. The compressor 51 is connected to the condenser 52. The condenser 52 is connected to the upper part of the first-effect heat exchanger 37. The lower part of the first-effect heat exchanger 37 is connected to the liquid inlet of the three-in-one gas-liquid separator 53. The liquid outlet of the three-in-one gas-liquid separator 53 is connected to the expansion valve 54. The expansion valve 54 is connected to the evaporator 55. The evaporator 55 is connected to the air inlet of the three-in-one gas-liquid separator 53. The exhaust port of the three-in-one gas-liquid separator 53 is connected to the compressor 51. The lower parts of the second-effect heat exchanger 35 and the lower parts of the three-effect heat exchanger 33 are respectively connected to the evaporator 55 through a fourth pipe 319. The refrigerant is compressed into a high-temperature, high-pressure gas in the compressor. It releases heat through the condenser and exchanges heat with the first-effect heat exchanger, becoming a medium-temperature, high-pressure liquid refrigerant. This liquid then flows into a three-in-one gas-liquid separator to separate impurities. Afterward, the liquid refrigerant is throttled and depressurized through the expansion valve, becoming a low-temperature, low-pressure liquid refrigerant. Next, this low-temperature, low-pressure liquid refrigerant enters the evaporator to absorb heat, evaporating into a low-pressure gaseous refrigerant, which then flows back into the three-in-one gas-liquid separator to separate some of the liquid refrigerant. This ensures that only gaseous refrigerant is drawn into the compressor and recompressed, completing a full cycle. The included heat pump device can reuse the sensible and latent heat of the concentrator unit, maintaining a constant temperature, preventing damage to material properties, and offering energy savings, environmental friendliness, and high stability.

[0027] In some specific implementation methods, refer to Figs. 1-3 The concentration device 3 is connected to a vacuum device 6, which includes a vacuum pump 61 and a cooler 62. The lower parts of the double-effect heat exchanger 35 and the triple-effect heat exchanger 33 are connected to the lower parts of the evaporator 55 via PU gas pipes. The lower part of the evaporator 55 is connected to the upper part of the collected condensate preheater 32 via PU gas pipes. The lower part of the collected condensate preheater 32 is connected to the vacuum pump 61, and the vacuum pump 61 is connected to the cooler 62. Through the PU gas pipes, the double-effect and triple-effect heat exchangers can be connected to the collected condensate preheater, allowing the condensate at a certain temperature generated by the unit to preheat the material in the form of a water film under the suction of the vacuum pump, thus fully utilizing the heat of the condensate generated by the unit. Preferably, the vacuum device 6 is arranged on the lower layer of the frame 1.

[0028] As an improved implementation method, refer to Figs. 1-3The concentration unit 3 is connected to a cleaning device 7, which includes a cleaning pump 71 and three cleaning balls 72. One end of the cleaning pump 71 is connected to external clean water or alkaline solution, and the other end of the cleaning pump 71 is connected to the three cleaning balls 72 via pipes. The three cleaning balls 72 are respectively fixed in a first-effect gas-liquid separator 310, a second-effect gas-liquid separator 311, and a third-effect gas-liquid separator 312. By providing the cleaning device, the concentration unit is cleaned every time it is started and stopped, ensuring that the unit remains clean and hygienic at all times. Preferably, the cleaning device 7 is arranged on the lower layer of the frame 1.

[0029] In some specific implementations, each pipeline may be further equipped with a valve individually to facilitate control and maintenance.

[0030] Work process: Reference Fig. 3 Upon initial startup, the cooler 62, vacuum pump 61, and steam boiler 4 need to be turned on. Once the negative pressure inside the machine reaches a certain value, the steam valve is opened, and the triple-effect circulation pump 34 and the double-effect circulation pump 36 are turned on. Once the temperature rises to a certain value, the automatic mode is activated. In automatic mode, the material is drawn in by negative pressure through the feed pipe 31, and its temperature is increased by the condensate heat exchanger 32. The material enters the triple-effect heat exchanger 33 from the top of the triple-effect heat exchanger. Through the pumping action of the triple-effect circulation pump 34, some material flows back to the triple-effect heat exchanger 33 for circulation, while some material enters the double-effect heat exchanger 35. Then, through the pumping action of the double-effect circulation pump 36, some material flows back to the double-effect heat exchanger 35 for circulation, while some material enters the first-effect heat exchanger 37. Finally, through the pumping action of the first-effect circulation pump 38, some material flows back to the first-effect heat exchanger 37 for circulation, while some material is discharged from the concentrator through the discharge pump 39. After concentration is completed, start the cleaning device 7 and use the cleaning pump 71 to connect alkaline solution or clean water to clean the entire concentrator body.

[0031] The above embodiments are merely illustrative of the concept and technical solution of this utility model, and are not intended to limit this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

[0032] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A small heat pump triple-effect vacuum falling film thiocyanate, comprising a frame and a control box mounted on the frame, characterized in that, The upper layer of the frame is equipped with a concentration device, the middle layer of the frame is equipped with a steam boiler, and the lower layer of the frame is equipped with a heat pump device. The steam outlet pipe of the steam boiler is connected to the concentration device, and the heat pump device is connected to the concentration device.

2. The small heat pump triple-effect vacuum falling film thiocyanate according to claim 1, characterized in that, The concentration device includes a feed pipe, a condensate preheater, a triple-effect heat exchanger, a triple-effect circulating pump, a double-effect heat exchanger, a double-effect circulating pump, a first-effect heat exchanger, a first-effect circulating pump, and a discharge pump connected in sequence. A first-effect gas-liquid separator is connected between the lower part of the first-effect heat exchanger and the upper part of the double-effect heat exchanger. A double-effect gas-liquid separator is connected between the lower part of the double-effect heat exchanger and the upper part of the triple-effect heat exchanger. A triple-effect gas-liquid separator is connected to the lower part of the triple-effect heat exchanger. The triple-effect gas-liquid separator and the first-effect heat exchanger are respectively connected to the heat pump device. The upper part of the triple-effect heat exchanger is connected to the steam boiler. A first circulation pipe connecting the top of the first-effect heat exchanger is provided between the first-effect circulating pump and the discharge pump. A second circulation pipe connecting the top of the double-effect heat exchanger is provided between the double-effect circulating pump and the first-effect heat exchanger. A third circulation pipe connecting the top of the triple-effect heat exchanger is provided between the triple-effect circulating pump and the double-effect heat exchanger.

3. The small-scale heat pump triple-effect vacuum falling film thiocyanate according to claim 2, characterized in that, A first pipe is provided between the first-effect circulating pump and the first-effect heat exchanger, and is connected to the bottom of the first-effect gas-liquid separator. A second pipe is provided between the second-effect circulating pump and the second-effect heat exchanger, and is connected to the bottom of the second-effect gas-liquid separator. A third pipe is provided between the third-effect circulating pump and the third-effect heat exchanger, and is connected to the bottom of the third-effect gas-liquid separator.

4. The small-scale heat pump triple-effect vacuum falling film thiocyanate according to claim 2, characterized in that, The heat pump device includes a compressor, a condenser, a three-in-one gas-liquid separator, an expansion valve, and an evaporator. The evaporator is connected to the top of the three-effect gas-liquid separator, the compressor is connected to the condenser, the condenser is connected to the upper part of the first-effect heat exchanger, the lower part of the first-effect heat exchanger is connected to the liquid inlet of the three-in-one gas-liquid separator, the liquid outlet of the three-in-one gas-liquid separator is connected to the expansion valve, the expansion valve is connected to the evaporator, the evaporator is connected to the air inlet of the three-in-one gas-liquid separator, and the exhaust port of the three-in-one gas-liquid separator is connected to the compressor.

5. The small heat pump triple-effect vacuum falling film thiocyanate according to claim 4, characterized in that, The concentration device is connected to a vacuum device, which includes a vacuum pump and a cooler. The lower part of the double-effect heat exchanger and the lower part of the triple-effect heat exchanger are respectively connected to the lower part of the evaporator through PU gas pipes. The lower part of the evaporator is connected to the upper part of the collected condensate preheater through PU gas pipes. The lower part of the collected condensate preheater is connected to the vacuum pump, and the vacuum pump is connected to the cooler.

6. The small-scale heat pump triple-effect vacuum falling film thiocyanate according to claim 5, characterized in that, The vacuum device is located on the lower layer of the frame.

7. The small heat pump triple-effect vacuum falling film thiocyanate according to claim 4, characterized in that, The lower parts of the double-effect heat exchanger and the lower parts of the triple-effect heat exchanger are respectively connected to the evaporator via a fourth pipe.

8. The small-scale heat pump triple-effect vacuum falling film thiocyanate according to claim 2, characterized in that, The concentration device is connected to a cleaning device, which includes a cleaning pump and three cleaning balls. One end of the cleaning pump is connected to external clean water or alkaline solution, and the other end of the cleaning pump is connected to the three cleaning balls through pipes. The three cleaning balls are respectively fixed in a first-effect gas-liquid separator, a second-effect gas-liquid separator, and a third-effect gas-liquid separator.

9. The small heat pump triple-effect vacuum falling film thiocyanate according to claim 8, characterized in that, The cleaning device is arranged on the lower layer of the frame.

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