Central circulation tube climbing film type ultra-clean pure steam generator

Abstract

Central circulation tube climbing film type ultra-clean pure steam generator, comprising a sampling condenser, a heater, a non-condensable gas separator, an evaporator and a superheater; the outlet end of the sampling condenser is connected to the working steam condensate heat recovery device through a second pipeline, the working steam condensate heat recovery device is communicated with the heater, the heater is connected to the non-condensable gas separator through a water delivery pipeline, and a breather is arranged at the upper end of the non-condensable gas separator; the lower end of the non-condensable gas separator is connected to a preheater through a fourth pipeline, and the upper end of the preheater is communicated with the inner cavity of the non-condensable gas separator through a gas pipeline; the preheater is communicated with the evaporator through a fifth pipeline, a steam-water separator is installed in the inner cavity of the evaporator, the evaporator is communicated with the superheater through a sixth pipeline, and a pure steam outlet pipeline is arranged at the upper end of the superheater. The present invention overcomes the deficiencies of the prior art, and the pure steam produced by it also has an extremely low non-condensable gas content, an extremely high dryness, and can perform pasteurization on its own feed water pipeline.

Description

Technical Field

[0001] The present invention relates to the technical field of pure steam sterilization and disinfection equipment, and particularly to a central circulation tube climbing film type ultra-clean pure steam generator. Background Art

[0002] Currently, there are two types of pure steam generators produced at home and abroad:

[0003] The first type is a falling film evaporation type pure steam generator with continuous feed water. This machine has good evaporation effect and low manufacturing material cost. However, a large amount of non-condensable gas is contained in the pure steam produced by it, resulting in serious over-standard of non-condensable gas. The reason is that the feed water volume is supplied by a water pump at 1.1 times the rated pure steam output of the machine. When sterilizing and disinfecting equipment, instruments and other items, at the beginning, since the temperature of the items to be sterilized and disinfected is very low, the consumption of pure steam is very large (the consumption of pure steam at this time is the rated pure steam output of the pure steam generator). After that, as the temperature of the items to be sterilized and disinfected continuously increases, the consumption of pure steam becomes less and less. When the temperature of the items to be sterilized and disinfected rises to the heat preservation state, the consumption of pure steam is very small. But at this time, the feed water volume does not decrease. Therefore, the dissolved gas in the feed water is heated and sprayed and then separated from the feed water and enters the pure steam, resulting in serious over-standard of the non-condensable gas content in the pure steam and greatly reducing the cleanliness of the pure steam.

[0004] The second type is an external heating circulation evaporation type pure steam generator. This machine has a small feed water consumption and solves the problem of large water intake of the first type. However, due to the large steam-water separation chamber, the manufacturing cost is high. This machine is composed of a tube-in-tube immersion heater and a steam-water separator arranged in parallel. Its feed water volume is controlled by the liquid level of the material water in the steam-water separator, and the feed water volume is also controlled at 1.1 times the actual output of the pure steam. The separation chamber is designed according to 1.1 times the feed water. That is, when the machine is running, when the temperature of the items to be sterilized and disinfected is low, the consumption of pure steam is large and the feed water volume is also large. When the temperature of the items to be sterilized and disinfected rises, the consumption of pure steam is small and the feed water volume also decreases accordingly. The content of non-condensable gas in the pure steam produced is relatively less than that of the first type, but the content of non-condensable gas in the pure steam is still very high.

[0005] Not only do the above two machines have a high content of non-condensable gas in the produced pure steam, but also the dryness of the pure steam is not high, that is, the dryness of the pure steam is <90%. Therefore, the pure steam produced by these two machines cannot achieve the ideal best sterilization and disinfection effect. Summary of the Invention

[0006] In view of the deficiencies of the prior art, the present invention provides a central circulation tube climbing film type ultra-clean pure steam generator, which overcomes the deficiencies of the prior art. It not only has the advantages of compactness and rationality in structure, but also the pure steam produced by it has an extremely low non-condensable gas content, an extremely high dryness, and can perform pasteurization on its own feed water pipeline.

[0007] To achieve the above objectives, the present invention is realized through the following technical solutions:

[0008] The central circulation tube climbing film type ultra-clean pure steam generator includes a sampling condenser, a working steam condensate heat recovery device, a heater, a non-condensable gas separator, an evaporator, and a superheater; the feed port of the sampling condenser is connected to the purified water output end through a first pipeline, the water outlet end of the sampling condenser is connected to the first inlet end of the working steam condensate heat recovery device through a second pipeline, the first outlet end of the working steam condensate heat recovery device is connected to the inner cavity of the heater through a third pipeline, one end of a water delivery pipeline is fixedly connected to the inner cavity of the heater, the other end of the water delivery pipeline passes through the upper surface of the non-condensable gas separator and is fixedly installed with a sprayer, and a breather is connected to the upper end of the non-condensable gas separator through a ventilation pipeline; one end of a fourth pipeline is fixedly connected to the lower end of the non-condensable gas separator, the other end of the fourth pipeline passes through the upper surface of the preheater and is fixedly connected with a sprayer, and the upper end of the preheater is connected to the upper end of the inner cavity of the non-condensable gas separator through a gas pipeline;

[0009] The water outlet end of the preheater is connected to the lower tube box of the evaporator through a fifth pipeline, a steam-water separator is fixedly installed on the upper side of the inner cavity of the evaporator, one end of a sixth pipeline is fixedly connected to the upper surface of the evaporator, the other end of the sixth pipeline is connected to the lower tube box of the superheater, the upper end of the superheater is fixedly connected with a pure steam outlet pipeline, and a steam condensate discharge pipeline is provided at the lower end of the superheater.

[0010] Preferably, the upper part of the superheater is connected to the working steam output end through a seventh pipeline; the upper and lower sides of the side surface of the superheater are respectively connected to the upper and lower parts of the inner cavity of the evaporator through an eighth pipeline and a ninth pipeline, and the upper and lower sides of the side surface of the evaporator are respectively connected to the upper and lower parts of the inner cavity of the preheater through a tenth pipeline and an eleventh pipeline; the upper and lower sides of the side surface of the preheater are respectively connected to the upper and lower parts of the inner cavity of the heater through a twelfth pipeline and a thirteenth pipeline; the lower side of the side surface of the heater is connected to the second inlet end of the working steam condensate heat recovery device through a fourteenth pipeline, and the second outlet end of the working steam condensate heat recovery device is connected to a drain port.

[0011] Preferably, two branch pipelines are provided at the end of the seventh pipeline far from the superheater, control valves are provided on both branch pipelines, and a steam trap is provided in parallel with the control valve on one of the branch pipelines.

[0012] Preferably, one end of the fifteenth pipeline is fixedly connected to the middle of the fourth pipeline, and the other end of the fifteenth pipeline is communicated with the first pipeline.

[0013] Preferably, a first flowmeter and a first control valve are arranged on the first pipeline, the first flowmeter and the first control valve constitute a flow metering device, a second control valve is arranged at the purified water output end, the end of the fifteenth pipeline is located between the first control valve and the second control valve, a third control valve is arranged on the fifteenth pipeline, and a fourth control valve is arranged at one end of the fourth pipeline close to the preheater.

[0014] Preferably, a water pump, a second flowmeter and a control valve are respectively arranged at one end of the fourth pipeline close to the non-condensable gas separator.

[0015] Preferably, a concentrated water outlet pipeline is fixedly installed at the lower end of the evaporator, and a control valve and a third flowmeter are arranged on the concentrated water outlet pipeline.

[0016] Preferably, a sampling pipeline is fixedly installed at the lower end of the sampling condenser, a sampling valve is arranged on the sampling pipeline, and the upper end of the sampling condenser is communicated with the sixth pipeline through a steam sampling pipeline.

[0017] The present invention provides a central circulation tube climbing film type ultra-clean pure steam generator. It has the following beneficial effects: through the feed water thermal deaeration device composed of the third pipeline, the heater, the water delivery pipeline, the non-condensable gas separator and the fourth pipeline connected in sequence, the non-condensable gas in the feed water can be effectively removed, so that the pure steam reaches ultra-cleanliness; and through the sprayer at the upper end of the inner cavity of the non-condensable gas separator, the material water can separate the non-condensable gas in the material water into the gas space above the inner cavity of the non-condensable gas separator in a sprayed state, and then pass through the sprayer above the preheater tube box, so that the remaining non-condensable gas in the material water can be separated again through the action of spraying, thus effectively preventing the remaining non-condensable gas after separation from entering the evaporator and affecting the purity of the pure steam.

[0018] By setting a central circulation tube evaporator for climbing film evaporation, the unevaporated material water forms a film-like liquid flow and is dragged upward along the inner wall of the tube by the new steam in the evaporator, and then flows into the central material water circulation tube through the upper tube plate; most of the concentrated water flows into the bottom of the evaporator and is mixed with the newly entered material water and then undergoes the above evaporation. Thus, the deficiencies of too high non-condensable gas content in the falling film evaporator and the too high material cost of the external circulation evaporator are solved.

[0019] By setting a working steam condensate heat recovery device, the feed water can effectively recover the heat discharged from the working steam condensate and then send it back to the machine for reuse to reduce the energy consumption of the machine.

[0020] It is transported to the non-condensable gas separator through the first pipeline, sampling condenser, second pipeline, working steam condensate heat recovery device, third pipeline, heater and water delivery pipeline that are connected in sequence, and then enters the first pipeline again through the fifteenth pipeline for circulating flow, thus constituting the pasteurization system. Brief Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the attached drawings required for the description of the prior art will be briefly introduced below.

[0022] Figure 1 Structural schematic diagram of the present invention;

[0023] Figure 2 Partial structural schematic diagram of the present invention;

[0024] Figure 3 For Figure 1 Partial enlarged view at A in

[0025] Figure 4 For Figure 1 Partial enlarged view at B in

[0026] Figure 5 For Figure 3 Partial enlarged view at C in

[0027] Explanation of the reference numerals in the drawings:

[0028] 1. Sampling condenser; 2. Working steam condensate heat recovery device; 3. Heater; 4. Non-condensable gas separator; 5. Evaporator; 6. Superheater; 7. First pipeline; 8. Second pipeline; 9. Third pipeline; 10. Water delivery pipeline; 12. Breather; 13. Fourth pipeline; 14. Preheater; 15. Gas pipeline; 16. Steam-water separator; 17. Sixth pipeline; 19. Pure steam outlet pipeline; 20. Steam condensate discharge pipeline; 21. Seventh pipeline; 22. Eighth pipeline; 23. Ninth pipeline; 24. Tenth pipeline; 25. Eleventh pipeline; 26. Twelfth pipeline; 27. Thirteenth pipeline; 28. Fourteenth pipeline; 29. Fifteenth pipeline; 30. First flowmeter; 31. First control valve; 32. Second control valve; 33. Third control valve; 34. Fourth control valve; 35. Water pump; 36. Second flowmeter; 37. Concentrated water outlet pipeline; 38. Third flowmeter; 39. Sampling pipeline; 40. Steam sampling pipeline. Detailed Embodiments

[0029] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below in conjunction with the attached drawings in the present invention.

[0030] Example 1, as Figures 1-5As shown in the figure, the present invention discloses a central circulation tube climbing film type ultra-clean pure steam generator, which includes a sampling condenser 1, a working steam condensate heat recovery device 2, a heater 3, a non-condensable gas separator 4, an evaporator 5 and a superheater 6; the feed port of the sampling condenser 1 is connected to the output end of purified water through a first pipeline 7, and the water outlet end of the sampling condenser 1 is connected to the first inlet end of the working steam condensate heat recovery device 2 through a second pipeline 8. The first outlet end of the working steam condensate heat recovery device 2 is connected to the inner cavity of the heater 3 through a third pipeline 9. One end of a water delivery pipeline 10 is fixedly connected inside the heater 3, and the other end of the water delivery pipeline 10 passes through the upper surface of the non-condensable gas separator 4 and is fixedly installed with a sprayer. The upper end of the non-condensable gas separator 4 is connected with a respirator 12 with an air filtration accuracy of 0.2μm through a ventilation pipeline; the lower end of the non-condensable gas separator 4 is fixedly connected to one end of a fourth pipeline 13, and the other end of the fourth pipeline 13 passes through the upper surface of the preheater 14 and is fixedly connected with a sprayer. The upper end of the preheater 14 is connected to the upper inner cavity of the non-condensable gas separator 4 through a gas pipeline 15;

[0031] The water outlet end of the preheater 14 is connected to the lower tube sheet of the evaporator 5 through a fifth pipeline. In this embodiment, a double tube sheet shell and tube heat exchanger is installed in the lower part of the inner cavity of the evaporator 5, and a water circulation tube is installed in the center of the heat exchanger. A high-speed spiral (or wire mesh type) steam-water separator 16 is fixedly installed at the upper end of the inner cavity of the evaporator 5. One end of a sixth pipeline 17 is fixedly connected to the upper surface of the evaporator 5, and the other end of the sixth pipeline 17 is connected to the lower tube sheet of the superheater 6. The upper end of the superheater 6 is fixedly connected with a pure steam outlet pipeline 19, and a steam condensate discharge pipeline 20 is arranged at the lower end of the superheater 6.

[0032] Working principle:

[0033] During use, the purified water (feed water) in the circulating purified water pipeline enters the shell side of the sampling condenser 1 through the first pipeline 7. After condensation and sampling, it then enters the shell side of the working steam condensate heat recovery device 2 through the second pipeline 8. After absorbing the heat of the working steam condensate in the shell side by the working steam condensate heat recovery device 2, it then enters the tube side of the feed water degassing heater 3 through the third pipeline 9 and is heated to 85 - 90°C. The heated feed water then enters the sprayer at the upper end of the inner cavity of the non-condensable gas separator 4 through the water delivery pipeline 10. Thus, the non-condensable gas in the feed water can be separated into the gas space above the inner cavity of the non-condensable gas separator 4 in a sprayed state, and the non-condensable gas is filtered and discharged by the respirator 12;

[0034] The feed water exiting the non-condensable gas separator 4 enters the sprayer above the tube box of the preheater 8 through the fourth pipeline 13. Thus, the residual non-condensable gas in the feed water can be separated again through the effect of spraying, effectively preventing the residual non-condensable gas after separation from entering the evaporator 5 and affecting the purity of the pure steam. The separated non-condensable gas flows into the non-condensable gas separator 4 through the gas pipeline 15 for discharge. After being heated by the preheater 8, the separated feed water enters the lower tube box of the evaporator 5 through the fifth pipeline, mixes with the unevaporated feed water, and then enters the tube side for climbing film evaporation. The unevaporated feed water (i.e., concentrated water) forms a film-like liquid flow and is dragged upward along the inner wall of the tube by the fresh steam in the evaporator 5, and then flows into the central feed water circulation pipe through the upper tube sheet. Most of the concentrated water flows to the bottom of the evaporator 5, mixes with the newly entered feed water, and then undergoes the above evaporation. Thus, the deficiencies of excessive non-condensable gas content in the falling film evaporator and the excessive material cost of the external circulation evaporator are solved.

[0035] The feed water thermal deaeration device composed of the third pipeline 9, heater 3, water delivery pipeline 10, non-condensable gas separator 4, and fourth pipeline 13 connected in sequence can effectively remove the non-condensable gas in the feed water and make the pure steam reach ultra-cleanliness. Among them, the heater 3 is a double tube sheet shell and tube heat exchanger, and the non-condensable gas separator 4 is a cylindrical or square container, with a sprayer equipped at the upper end inside the container, which can separate the non-condensable gas in the feed water in a spraying state.

[0036] The heat of the working steam condensate discharged is effectively recovered by the feed water through the working steam condensate heat recovery device 2 and then sent back to the machine for reuse to reduce the energy consumption of the machine. In this embodiment, the working steam condensate heat recovery device 2 has a double tube sheet shell and tube structure.

[0037] Embodiment 2, as a further scheme of Embodiment 1, the upper part of the superheater 6 is connected to the working steam output end through the seventh pipeline 21; the upper and lower parts of the side surface of the superheater 6 are respectively connected to the upper and lower parts of the inner cavity of the evaporator 5 through the eighth pipeline 22 and the ninth pipeline 23; the upper and lower parts of the side surface of the evaporator 5 are respectively connected to the upper and lower parts of the inner cavity of the preheater 14 through the tenth pipeline 24 and the eleventh pipeline 25; the upper and lower parts of the side surface of the preheater 14 are respectively connected to the upper and lower parts of the inner cavity of the heater 3 through the twelfth pipeline 26 and the thirteenth pipeline 27; the lower part of the side surface of the heater 3 is connected to the second inlet end of the working steam condensate heat recovery device 2 through the fourteenth pipeline 28, and the second outlet end of the working steam condensate heat recovery device 2 is connected to the drain outlet.

[0038] The working steam enters the shell side of the superheater 6 through the seventh pipeline 21 to heat the wet saturated pure steam in the tube side into dry saturated pure steam. The working steam in the working part condenses into condensate and flows into the shell side of the evaporator 5 through the ninth pipeline 23. The non-working steam enters the shell side of the evaporator 5 through the eighth pipeline 22 to evaporate the material water in its tube side. The steam that has worked in the shell side of the evaporator 5 condenses into condensate and then flows into the shell side of the preheater 14 through the eleventh pipeline 25. The non-working steam enters the shell side of the preheater 14 through the tenth pipeline 24 to heat the material water in the tube side. The working steam that has done thermal work in the preheater condenses into condensate and flows into the shell side of the material water degassing heater 3 through the thirteenth pipeline 27. The non-working steam enters the shell side of the heater 3 through the twelfth pipeline 26 to heat the material water in its tube side. Then it condenses into condensate and flows into the second inlet end of the working steam condensate heat recovery device 2 through the fourteenth pipeline 28, so that the heat can be transferred to the material water in the tube side. After that, it loses heat and the working steam condensate is discharged or recycled from the second outlet end, and the non-condensable gas in the working steam condensate is discharged from its discharge port.

[0039] Embodiment 3, as a further preferred solution of Embodiment 2, two branch pipelines are provided at one end of the seventh pipeline 21 far from the superheater 6. Control valves are provided on both branch pipelines, and a steam trap is provided in parallel with the control valve on one of the branch pipelines. The working steam can be transported more efficiently through the two branch pipelines; and the condensate water, air and carbon dioxide gas in the working steam can be discharged as soon as possible through the steam trap, while preventing steam leakage to the maximum extent.

[0040] Embodiment 4, as a further preferred solution of Embodiment 2, one end of the fifteenth pipeline 29 is fixedly connected to the middle of the fourth pipeline 13, and the other end of the fifteenth pipeline 29 is communicated with the first pipeline 7. A first flowmeter 30 and a first control valve 31 are provided on the first pipeline 7. The first flowmeter 30 and the first control valve 31 constitute a flow measurement device. A second control valve 32 is provided at the purified water output end. The end of the fifteenth pipeline 29 is located between the first control valve 31 and the second control valve 32. A third control valve 33 is provided on the fifteenth pipeline 29. A fourth control valve 34 is provided at one end of the fourth pipeline 13 close to the preheater 14. A water pump 35, a second flowmeter 36 and a control valve are respectively provided at one end of the fourth pipeline 13 close to the non-condensable gas separator 4.

[0041] During use, first open the first control valve 31 and the second control valve 32, and close the third control valve 33 and the fourth control valve 34, so that the material water (purified water) sequentially passes through the first pipeline 7, the sampling condenser 1, the second pipeline 8, the working steam condensate heat recovery device 2, the third pipeline 9, the heater 3 and the water delivery pipeline 10 and is transported to the non-condensable gas separator 4, so that the material water in the non-condensable gas separator 4 is added to the highest water level control line.

[0042] Then control the second control valve 32 to close, and then start the water pump 35, so that the material water in the non-condensable gas separator 4 sequentially passes through the fourth pipeline 13, the fifteenth pipeline 29, the third control valve 33, the first flowmeter 30 and the first control valve 31 to form a flow measurement device, the sampling condenser 1, the second pipeline 8, the working steam condensate heat recovery device 2 and the third pipeline 9 and enters the heater 3 for heating, and then is transported to the non-condensable gas separator 4 again through the water delivery pipeline 10. In this way, the heated material water circulates for 45 minutes, which is the pasteurization process.

[0043] Embodiment 5, as a further preferred solution of Embodiment 1, a concentrated water outlet pipeline 37 is fixedly installed at the lower end of the evaporator 5, and a control valve and a third flowmeter 38 are provided on the concentrated water outlet pipeline 37. Thus, when the unevaporated concentrated water flows in a film-like manner along the inner wall of the evaporator 5 and is pulled up by the fresh steam in the pipe and flows into the central circulation pipe from the upper tube sheet, a small part of the concentrated water can be discharged in a limited amount through the concentrated water outlet pipeline 37, so as to facilitate the detection of the concentrated water in the evaporator 5.

[0044] Embodiment 6, as a further preferred solution of Embodiment 1, a sampling pipeline 39 is fixedly installed at the lower end of the sampling condenser 1, a sampling valve is provided on the sampling pipeline 39, and the upper end of the sampling condenser 1 is connected to the sixth pipeline 17 through a steam sampling pipeline 40. When sampling the initial material water, the sampling valve can be opened to allow the material water in the sampling condenser 1 to flow out through the sampling pipeline 39 for sampling.

[0045] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. Central circulation tube climbing film type ultra-clean pure steam generator, characterized in that: It includes a sampling condenser (1), a working steam condensate heat recovery device (2), a heater (3), a non-condensable gas separator (4), an evaporator (5) and a superheater (6); the feed port of the sampling condenser (1) is communicated with the purified water output end through a first pipeline (7), the material water outlet end of the sampling condenser (1) is communicated with the first inlet end of the working steam condensate heat recovery device (2) through a second pipeline (8), the first outlet end of the working steam condensate heat recovery device (2) is communicated with the inner cavity of the heater (3) through a third pipeline (9), one end of a water delivery pipeline (10) is fixedly connected to the inner cavity of the heater (3), the other end of the water delivery pipeline (10) passes through the upper surface of the non-condensable gas separator (4) and a sprayer is fixedly installed; the upper end of the non-condensable gas separator (4) is connected with a breather (12) through a vent pipeline; one end of a fourth pipeline (13) is fixedly connected to the lower end of the non-condensable gas separator (4), the other end of the fourth pipeline (13) passes through the upper surface of a preheater (14) and a sprayer is fixedly connected, and the upper end of the preheater (14) is communicated with the upper end of the inner cavity of the non-condensable gas separator (4) through a gas pipeline (15); the material water outlet end of the preheater (14) is communicated with the lower tube box of the evaporator (5) through a fifth pipeline, a steam-water separator (16) is fixedly installed on the upper side of the inner cavity of the evaporator (5), one end of a sixth pipeline (17) is fixedly connected to the upper surface of the evaporator (5), the other end of the sixth pipeline (17) is communicated with the lower tube box of the superheater (6), a pure steam outlet pipeline (19) is fixedly connected to the upper end of the superheater (6), and a steam condensate discharge pipeline (20) is arranged at the lower end of the superheater (6).

2. The central circulation tube climbing film type ultra-clean pure steam generator according to claim 1, wherein: The upper part of the superheater (6) is connected with the working steam output end through a seventh pipeline (21); the upper and lower parts of the side surface of the superheater (6) are respectively connected with the upper and lower parts of the inner cavity of the evaporator (5) through an eighth pipeline (22) and a ninth pipeline (23), the upper and lower parts of the side surface of the evaporator (5) are respectively connected with the upper and lower parts of the inner cavity of the preheater (14) through a tenth pipeline (24) and an eleventh pipeline (25); the upper and lower parts of the side surface of the preheater (14) are respectively connected with the upper and lower parts of the inner cavity of the heater (3) through a twelfth pipeline (26) and a thirteenth pipeline (27); the lower part of the side surface of the heater (3) is connected with the second inlet end of the working steam condensate heat recovery device (2) through a fourteenth pipeline (28), and the second outlet end of the working steam condensate heat recovery device (2) is connected with a drain port.

3. The central circulation tube climbing film type ultra-clean pure steam generator according to claim 2, wherein: Two branch pipelines are arranged at the end of the seventh pipeline (21) far away from the superheater (6), control valves are arranged on both branch pipelines, and a steam trap is arranged in parallel with the control valve on one of the branch pipelines.

4. The central circulation tube climbing film type ultra-clean pure steam generator according to claim 1, characterized in that: One end of a fifteenth pipeline (29) is fixedly connected to the middle of the fourth pipeline (13), and the other end of the fifteenth pipeline (29) is communicated with the first pipeline (7).

5. The central circulation tube climbing film type ultra-clean pure steam generator according to claim 4, wherein: A first flowmeter (30) and a first control valve (31) are provided on the first pipeline (7). The first flowmeter (30) and the first control valve (31) constitute a flow metering device. A second control valve (32) is provided at the purified water output end. The end of the fifteenth pipeline (29) is located between the first control valve (31) and the second control valve (32). A third control valve (33) is provided on the fifteenth pipeline (29). A fourth control valve (34) is provided at one end of the fourth pipeline (13) close to the preheater (14).

6. The central circulation tube climbing film type ultra-clean pure steam generator according to claim 5, characterized in that: A water pump (35), a second flowmeter (36) and a control valve are respectively provided at one end of the fourth pipeline (13) close to the non-condensable gas separator (4).

7. The central circulation tube climbing film type ultra-clean pure steam generator according to claim 1, characterized in that: A concentrated water outlet pipeline (37) is fixedly installed at the lower end of the evaporator (5). A control valve and a third flowmeter (38) are provided on the concentrated water outlet pipeline (37).

8. The central circulation tube climbing film type ultra-clean pure steam generator according to claim 1, characterized in that: A sampling pipeline (39) is fixedly installed at the lower end of the sampling condenser (1). A sampling valve is provided on the sampling pipeline (39). The upper end of the sampling condenser (1) is communicated with the sixth pipeline (17) through a steam sampling pipeline (40).

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