Vertical hot-pressing distilled water machine

Abstract

The utility model discloses a vertical hot-pressing distilled water machine which comprises an evaporator, a concentrated water preheater, a condensed water preheater, an injection water buffer tank, an injection water pump, an injection water preheater, a non-condensable gas preheater, a steam preheater and a magnetic suspension compressor, the position, corresponding to the steam-water separation chamber, of the evaporator is connected with the position, corresponding to the evaporation chamber, of the evaporator through a magnetic suspension compressor, and a condensate water discharging pipeline is further arranged on the magnetic suspension compressor. The magnetic suspension compressor is adopted, so that the occupied area of equipment is greatly reduced, the efficiency can be improved, and the loss is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of distillation equipment, in particular to a vertical hot-pressed water distiller. Background Art

[0002] With the development of modern science and technology, pharmaceutical factories, hospitals, and scientific research institutions are increasingly demanding higher standards for the production of water for injection. This requires manufacturers of production equipment to provide efficient, high-quality equipment to ensure the quality of water for injection, while also ensuring that the equipment produced achieves goals such as energy conservation and long service life. However, the most commonly used type of water distiller on the market today is the multi-effect water distiller. This type of equipment suffers from low water production, high energy consumption, short service life, large floor space requirements, unstable water quality, and high requirements for raw water quality, which affects production efficiency. While horizontal falling-film evaporation and hot-pressing water distillers overcome many of the drawbacks of multi-effect water distillers, they occupy a large floor space, making upgrading, renovation, and replacement of smaller multi-effect water distillers difficult.

[0003] In order to solve the above problems, the applicant previously applied for a utility model patent with patent application number CN2024204200082 and the patent name is "An energy-saving vertical hot-pressed distilled water machine". The utility model adds a secondary steam-water separation tank. The secondary steam-water separation tank, the compressor and the evaporator are connected by a pure steam pipeline. Since there is a separation device in the secondary steam-water separation tank, the unseparated steam and water are further separated, which reduces the conductivity of the injection water and makes the quality of the injection water more reliable.

[0004] The compressors used in existing vertical hot-pressed distilled water machines are mostly high-speed direct-drive rolling bearing centrifugal compressors. Although high-speed direct-drive rolling bearing centrifugal compressors have the advantages of large flow, high efficiency and good stability, their large size makes the equipment occupy a large area. Therefore, it is necessary to further improve them. Utility Model Content

[0005] The purpose of the utility model is to provide a vertical hot-pressed distilled water machine. The utility model adopts a magnetic suspension compressor, which greatly reduces the floor space of the equipment, improves efficiency and reduces loss.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a vertical hot-pressed distilled water machine, comprising an evaporator, a concentrated water preheater, a condensate preheater, an injection water buffer tank, an injection water pump, an injection water preheater, a non-condensable gas preheater, a steam preheater and a magnetic levitation compressor, the concentrated water preheater being provided with a raw water inlet, the water outlet of the concentrated water preheater being connected to the water inlet of the condensate preheater, the concentrated water preheater and the condensate preheater being provided with a concentrated water discharge port and a condensate discharge port respectively, the water outlet of the condensate preheater being connected to the water inlet of the injection water preheater and the water inlet of the non-condensable gas preheater respectively, the water outlet of the non-condensable gas preheater being connected to the water inlet of the steam preheater, the water outlet of the steam preheater being connected to the water inlet at the bottom of the evaporator, and the inner From top to bottom, a steam-water separation chamber, an evaporation chamber and a supplementary heating chamber are sequentially provided. The industrial steam is connected to the air inlet of the steam preheater and the air inlet of the evaporator respectively through a steam pipeline. The condensate outlet of the steam preheater and the condensate outlet of the evaporator are connected to the condensate inlet of the condensate preheater through a condensate pipeline. The water outlet of the non-condensable gas preheater is connected to the water inlet of the injection water buffer tank. The air outlet of the injection water buffer tank is connected to the air inlet of the non-condensable gas preheater. The injection water in the injection water buffer tank is transported to the injection water preheater through an injection water pump, and an injection water outlet is provided on the injection water preheater. The position of the evaporator corresponding to the steam-water separation chamber is connected to the position of the evaporator corresponding to the evaporation chamber through a magnetic levitation compressor. The magnetic levitation compressor is also provided with a condensate discharge pipeline.

[0007] The utility model is further configured such that a wire mesh for intercepting fine water mist and entrained impurities in the pure steam is provided in the steam-water separation chamber of the evaporator.

[0008] The utility model is further configured such that the evaporator is connected to the injection water buffer tank via an injection water pipeline at a position corresponding to the bottom of the evaporation chamber, and the inner diameter of the injection water pipeline is flush with the upper surface of the lower tube plate of the evaporation chamber.

[0009] The utility model is further configured such that the evaporator is connected to the air inlet of the non-condensable gas preheater via a non-condensable gas pipeline at the position corresponding to the upper part and the middle part of the evaporation chamber.

[0010] The utility model is further configured such that a non-condensable gas discharge port is provided on the non-condensable gas preheater.

[0011] The utility model is further configured such that the bottom of the evaporator is connected to the residual water inlet of the concentrated water preheater via a residual water discharge pipe.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The compressor has been replaced with a magnetic levitation compressor. Since the speed of the magnetic levitation compressor is very high, the diameter of the impeller will be very small, and the overall size of the compressor will be greatly reduced; the magnetic levitation compressor uses magnetic levitation bearings inside to eliminate friction, which improves efficiency and reduces losses; the magnetic levitation compressor uses air cooling technology, which avoids the cumbersome external cooling water and zero cooling water usage, further reducing operating costs.

[0014] 2. The evaporator is a vertical rising film evaporator. After entering the heating tube, it is heated and boiled, and then rapidly vaporizes. The generated steam rises rapidly within the tube. The solution, drawn by the rising steam, rises along the tube wall in a film-like manner, continuously evaporating in this process. The vapor-liquid mixture is separated in the separator, and the secondary steam is discharged at the top. Rising film evaporation provides more even material distribution and opposite liquid flow directions, resulting in more thorough heat exchange.

[0015] 3. The secondary separation tank is removed and a wire mesh is added to the steam-water separation chamber of the evaporator. The wire mesh intercepts the fine water mist and impurities in the pure steam. The pure steam without water mist and impurities is finally condensed into water for injection.

[0016] 4. The positions of the steam preheater and the non-condensable gas preheater have been adjusted. Previously, the steam preheater was placed in front of the non-condensable gas preheater, but now it has been moved behind it. Because the raw water needs to be heated to 100 degrees before entering the evaporator, it previously entered the steam preheater before entering the non-condensable gas preheater. The amount of non-condensable gas itself is very small, and to achieve 100 degrees before the raw water enters the evaporator, the raw water temperature must be very high before entering the non-condensable gas preheater. Therefore, when the non-condensable gas and raw water exchange heat, the temperature of the non-condensable gas cannot be lowered. This problem no longer exists after the two positions are swapped. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the utility model as a whole.

[0018] In the figure: 1. Evaporator; 2. Condensate preheater; 3. Condensate preheater; 4. Injection water buffer tank; 5. Injection water pump; 6. Injection water preheater; 7. Non-condensable gas preheater; 8. Steam preheater; 9. Magnetic levitation compressor; 10. Raw water inlet; 11. Concentrated water discharge port; 12. Condensate discharge port; 13. Steam-water separation chamber; 14. Evaporation chamber; 15. Supplementary heating chamber; 16. Steam pipeline; 17. Condensate pipeline; 18. Injection water outlet; 19. Condensate discharge pipeline; 20. Wire mesh; 21. Injection water pipeline; 22. Non-condensable gas pipeline; 23. Non-condensable gas discharge port; 24. Steam residual water discharge pipe. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] Example: As shown in the attached Figure 1The vertical hot-pressed distilled water machine shown includes an evaporator 1, a concentrated water preheater 2, a condensate preheater 3, an injection water buffer tank 4, an injection water pump 5, an injection water preheater 6, a non-condensable gas preheater 7, a steam preheater 8 and a magnetic levitation compressor 9. The concentrated water preheater 2 is provided with a raw water inlet 10, and the water outlet of the concentrated water preheater 2 is connected to the water inlet of the condensate preheater 3. The concentrated water preheater 2 and the condensate preheater 3 are respectively provided with a concentrated water discharge port 11 and a condensate discharge port 12. The water outlet of the condensate preheater 3 is respectively connected to the water inlet of the injection water preheater 6 and the water inlet of the non-condensable gas preheater 7. The water outlet of the non-condensable gas preheater 7 is connected to the water inlet of the steam preheater 8. The water outlet of the steam preheater 8 is connected to the water inlet at the bottom of the evaporator 1. The interior of the evaporator 1 is provided with steam-water separation Chamber 13, evaporation chamber 14 and supplementary heating chamber 15, industrial steam is connected to the air inlet of steam preheater 8 and the air inlet of evaporator 1 respectively through steam pipeline 16, the condensate outlet of steam preheater 8 and the condensate outlet of evaporator 1 are connected to the condensate inlet of condensate preheater 3 through condensate pipeline 17, the water outlet of non-condensable gas preheater 7 is connected to the water inlet of injection water buffer tank 4, the air outlet of injection water buffer tank 4 is connected to the air inlet of non-condensable gas preheater 7, the injection water in injection water buffer tank 4 is transported to injection water preheater 6 through injection water pump 5, and injection water preheater 6 is provided with injection water outlet 18, the position of steam-water separation chamber 13 of evaporator 1 is connected to the position of evaporation chamber 14 of evaporator 1 through magnetic levitation compressor 9, and the magnetic levitation compressor 9 is also provided with condensate discharge pipeline 19. In this solution, the high speed of the magnetic levitation compressor 9 allows for a very small impeller diameter, significantly reducing the compressor's overall dimensions. The internal magnetic bearings used in the magnetic levitation compressor 9 eliminate friction, improving efficiency and reducing losses. The magnetic levitation compressor 9 utilizes air cooling, eliminating the need for external cooling water and eliminating cooling water usage, further reducing operating costs. Furthermore, this solution adjusts the positions of the steam preheater 8 and the non-condensable gas preheater 7. Previously, the steam preheater 8 was placed before the non-condensable gas preheater 7, but now it is positioned behind it. Because the raw water needs to be heated to 100°C before entering the evaporator 1, it previously entered the steam preheater 8 before entering the non-condensable gas preheater 7. Since the amount of non-condensable gas itself is very small, achieving 100°C before entering the evaporator 1 requires a very high temperature before entering the non-condensable gas preheater 7. Consequently, when the non-condensable gas exchanges heat with the raw water, the non-condensable gas temperature cannot be reduced. This problem is eliminated by reversing the positions of the steam preheater 8 and the non-condensable gas preheater 7.

[0021] The steam-water separation chamber 13 of the evaporator 1 is provided with a wire mesh 20 for intercepting fine water mist and impurities in the pure steam. The pure steam without water mist and impurities is finally condensed into water for injection.

[0022] As attached Figure 1 As shown, the evaporator 1 is connected to the injection water buffer tank 4 at a position corresponding to the bottom of the evaporation chamber 14 through an injection water pipeline 21, and the inner diameter of the injection water pipeline 21 is flush with the upper surface of the lower tube plate of the evaporation chamber 14. This not only allows for complete drainage without dead water generation, thus ensuring the quality of the injection water, but also allows the heat exchange area of the evaporation chamber 14 to be fully utilized.

[0023] As attached Figure 1 As shown, the evaporator 1 is connected to the air inlet of the non-condensable gas preheater 7 via a non-condensable gas pipeline 22 at the upper and middle portions of the evaporation chamber 14 of the evaporator 1. Non-condensable gas discharge functions are added to the upper and middle portions of the evaporation chamber 14 of the evaporator 1 to improve the heat exchange efficiency of the evaporation chamber 14.

[0024] As attached Figure 1 As shown, the non-condensable gas preheater 7 is provided with a non-condensable gas discharge port 23 .

[0025] As attached Figure 1 As shown, the bottom of the evaporator 1 is connected to the steamed water inlet of the concentrated water preheater 2 through the steamed water discharge pipe 24. The steamed water can be accurately discharged according to the height of the steamed water to avoid discharging the raw water and causing waste.

[0026] In addition, the control part features:

[0027] 1. Evaporator 1 liquid level control: Use liquid level-flow cascade regulation to adjust the flow PID set value in real time according to the liquid level of evaporator 1, and maintain the minimum flow of water inlet during automatic operation, reduce the outlet water temperature and reduce the evaporator 1 drainage temperature.

[0028] 2. Evaporator 1 pressure control: Use single-loop pressure regulation. Compare the evaporator 1 pressure process value with the set value. If it is less than the set value, open the valve. If it is greater than the set value, close the valve. Adjust the speed according to the difference.

[0029] 3. Compressor Frequency Control: When the liquid level in evaporator 1 exceeds the low level value, the magnetic suspension controller passes self-test, the compressor inverter is fault-free, and the temperature at the top of evaporator 1 exceeds set value 1, the compressor starts and operates at low frequency. When the temperature at the top of evaporator 1 exceeds set value 2, the compressor operates at medium / high frequency. In non-hot standby mode, the compressor operates at high frequency; in hot standby mode, the compressor operates at medium frequency.

[0030] 4. Injection water outlet control: The injection water outlet temperature is controlled by adjusting the opening of the purified water bypass regulating valve, and the liquid level of the injection water buffer tank 4 is controlled by controlling the opening of the injection water outlet regulating valve, and the water is discharged to the qualified water tank and the unqualified water tank according to the outlet water conductivity.

Claims

1. Vertical hot-pressed distilled water machine, characterized by: The invention comprises an evaporator (1), a concentrated water preheater (2), a condensed water preheater (3), an injection water buffer tank (4), an injection water pump (5), an injection water preheater (6), a non-condensable gas preheater (7), a steam preheater (8) and a magnetic levitation compressor (9), wherein the concentrated water preheater (2) is provided with a raw water inlet (10), the water outlet of the concentrated water preheater (2) is connected to the water inlet of the condensed water preheater (3), and the concentrated water preheater (2) and the condensed water preheater (3) are separated. A concentrated water discharge port (11) and a condensed water discharge port (12) are provided respectively. The water outlet of the condensed water preheater (3) is connected to the water inlet of the injection water preheater (6) and the water inlet of the non-condensable gas preheater (7). The water outlet of the non-condensable gas preheater (7) is connected to the water inlet of the steam preheater (8). The water outlet of the steam preheater (8) is connected to the water inlet at the bottom of the evaporator (1). The interior of the evaporator (1) is provided with a steam-water separation chamber (13), a steam separation chamber (14), a steam separation chamber (15), a steam separation chamber (16), a steam separation chamber (17), a steam separation chamber (18), a steam separation chamber (19), a steam separation chamber (20), a steam separation chamber (21), a steam separation chamber (22), a steam separation chamber (23), a steam separation chamber (24), a steam separation chamber (25), a steam separation chamber (26), a steam separation chamber (27), a steam separation chamber (28), a steam separation chamber (29), a steam separation chamber (30), a steam separation chamber (31), a steam separation chamber (32), a steam separation chamber (33), a steam separation chamber (34), a steam separation chamber (35), a steam separation chamber (36), a steam separation chamber (37), a steam separation chamber (38), a steam separation chamber (39), a steam separation chamber (40), a steam separation chamber (41), a steam separation chamber (42), a steam separation chamber (43), a steam separation chamber (44), a steam separation chamber (45), a steam separation chamber (46), a steam separation chamber (47), a steam separation chamber (48), a steam separation chamber (49), a steam separation chamber (50), a steam separation chamber (51), a steam separation chamber (52), a steam separation chamber (53), a steam separation chamber (54), a steam separation chamber (55), a steam separation chamber (56), a steam separation chamber ( The industrial steam is connected to the air inlet of the steam preheater (8) and the air inlet of the evaporator (1) through the steam pipeline (16). The condensate outlet of the steam preheater (8) and the condensate outlet of the evaporator (1) are connected to the condensate inlet of the condensate preheater (3) through the condensate pipeline (17). The water outlet of the non-condensable gas preheater (7) is connected to the water inlet of the injection water buffer tank (4). The outlet of the injection water buffer tank (4) is connected to the water inlet of the injection water buffer tank (4). The air port is connected to the air inlet of the non-condensable gas preheater (7), the injection water in the injection water buffer tank (4) is transported to the injection water preheater (6) through the injection water pump (5), and the injection water preheater (6) is provided with an injection water outlet (18), the position of the evaporator (1) corresponding to the steam-water separation chamber (13) is connected to the position of the evaporator (1) corresponding to the evaporation chamber (14) through the magnetic levitation compressor (9), and the magnetic levitation compressor (9) is also provided with a condensed water discharge pipeline (19).

2. The vertical hot-pressed distilled water machine according to claim 1, characterized in that: A wire mesh (20) is provided in the steam-water separation chamber (13) of the evaporator (1) for intercepting fine water mist and entrained impurities in pure steam.

3. The vertical hot-pressed distilled water machine according to claim 1, characterized in that: The evaporator (1) is connected to the injection water buffer tank (4) at a position corresponding to the bottom of the evaporation chamber (14) through an injection water pipeline (21), and the inner diameter of the injection water pipeline (21) is flush with the upper surface of the lower tube plate of the evaporation chamber (14).

4. The vertical hot-pressed distilled water machine according to claim 1, characterized in that: The evaporator (1) is connected to the air inlet of the non-condensable gas preheater (7) via a non-condensable gas pipeline (22) at the upper and middle positions of the evaporation chamber (14).

5. The vertical hot-pressed distilled water machine according to claim 1, characterized in that: The non-condensable gas preheater (7) is provided with a non-condensable gas discharge port (23).

6. The vertical hot-pressed distilled water machine according to claim 1, characterized in that: The bottom of the evaporator (1) is connected to the residual water inlet of the concentrated water preheater (2) through a residual water discharge pipe (24).

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