A condensate water direct reuse device

Abstract

The application discloses a condensate water direct reuse device, and relates to the field of steam energy saving. The device comprises a condensate water input unit, a flash tank unit, a vapor-liquid separation unit and a water vapor compressor unit. The condensate water input unit receives steam with a temperature higher than a set temperature, which is used to heat materials in the unit to release heat energy and form high-temperature condensate water. The flash tank unit receives the high-temperature condensate water from the condensate water input unit, which is used to depressurize and flash to obtain low-pressure saturated steam and saturated condensate water. The vapor-liquid separation unit receives the low-pressure saturated steam from the flash tank unit, which is used to separate liquid water in the low-pressure saturated steam. The water vapor compression unit receives the low-temperature low-pressure saturated steam from the vapor-liquid separation unit, which is used to heat to form high-temperature high-pressure steam and return to the condensate water input unit. The application can recycle and utilize the high-temperature condensate water, and plays a role in energy saving and consumption reduction.

Description

Technical Field

[0001] This invention relates to the field of steam energy conservation, specifically to a device for direct condensate reuse. Background Technology

[0002] In the acetone distillation process, high-temperature steam is introduced from the bottom of the distillation tower. The steam is converted into high-temperature condensate after heat exchange in the distillation tower. The condensate flows back to the bottom of the distillation tower, forming a high-temperature bottom liquid. This high-temperature condensate cannot be directly reused without treatment. Currently, in most process equipment, the condensate is discharged externally, which not only results in high energy consumption in the production process but also causes energy waste and thermal pollution to the ecological environment.

[0003] In view of the above problems, the present invention proposes a device for direct recycling of condensate. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a device for direct condensate recycling, which can recycle high-temperature condensate, thereby achieving energy conservation and consumption reduction.

[0005] To achieve the above objectives, the present invention can adopt the following technical solutions:

[0006] A condensate direct reuse device includes a condensate input unit, a flash tank unit, a vapor-liquid separation unit, and a steam compressor unit, wherein...

[0007] The condensate input unit receives steam at a temperature higher than the set temperature, which is used to heat the material located in the unit to release heat energy and form high-temperature condensate.

[0008] The flash tank unit receives high-temperature condensate from the condensate input unit and uses it for depressurization flash evaporation to obtain low-pressure saturated steam and saturated condensate;

[0009] The vapor-liquid separation unit receives low-pressure saturated steam from the flash tank unit and is used to separate liquid water from the low-pressure saturated steam, and...

[0010] The water vapor compression unit receives low-temperature, low-pressure steam from the vapor-liquid separation unit, which is then heated to form high-temperature, high-pressure steam and returned to the condensate input unit.

[0011] The condensate direct reuse device described above further includes, in this case, a condensate input unit comprising:

[0012] The distillation unit is equipped with a steam inlet pipe that is connected to the steam compression unit.

[0013] The condensate direct reuse device described above further includes, in this case, a flash tank unit comprising:

[0014] The flash tank steam outlet is connected to the vapor-liquid separation unit;

[0015] The flash tank circulation inlet, flash tank circulation outlet, and flash tank condensate outlet are connected to the bottom of the condensate input unit. A first electric regulating valve is provided upstream of the flash tank circulation inlet and downstream of the flash tank circulation outlet; a second electric regulating valve is provided downstream of the flash tank condensate outlet.

[0016] A flash tank drain port is located at the bottom, and the flash tank drain port is connected to the drain outlet via a flash tank drain pipe.

[0017] In addition to the condensate direct reuse device described above, the flash tank unit is further equipped with a level gauge to adjust the opening degree of the first electric regulating valve and the second electric regulating valve.

[0018] In addition to the condensate direct reuse device described above, the flash tank unit further comprises:

[0019] The flash tank return water inlet is connected to the vapor-liquid separation unit;

[0020] The flash tank outlet is connected to the steam compressor unit. The flash tank outlet is provided with a flash tank outlet connecting pipe. The flash tank outlet connecting pipe is connected to the steam compressor unit through the steam compressor cooling water inlet pipe. A cooling jet pump is provided downstream of the flash tank outlet.

[0021] The condensate direct reuse device described above further includes, in this case, a vapor-liquid separation unit comprising:

[0022] The vapor outlet and cooling water return port of the vapor-liquid separator are connected to the vapor compression unit.

[0023] The vapor-liquid separator unit is connected to a vapor-liquid separator steam inlet and a vapor-liquid separator liquid outlet. The vapor-liquid separator steam inlet is connected to the vapor outlet of the flash tank via a vapor outlet connecting pipe, and the vapor-liquid separator liquid outlet is connected to the flash tank return water inlet via a vapor-liquid separator liquid outlet pipe.

[0024] In the condensate direct reuse device described above, the bottom of the vapor-liquid separation unit is connected to the drain outlet via a vapor-liquid separator drain connection pipe, and a first electric switch valve is provided on the vapor-liquid separator drain connection pipe.

[0025] The condensate direct reuse device described above further includes, in this case, a steam compressor unit comprising:

[0026] The steam compressor inlet is connected to the steam outlet of the vapor-liquid separator;

[0027] A cooling water connection pipe connected to the cooling water of the water pump;

[0028] Steam compressor motor; and,

[0029] The steam compressor outlet is connected to the condensate input unit, and the steam compressor outlet is connected to the steam inlet pipe via a steam compressor outlet connecting pipe.

[0030] In addition to the condensate direct reuse device described above, a circulating water pump is further provided upstream of the flash tank circulation inlet and downstream of the first electric regulating valve.

[0031] In the aforementioned condensate direct reuse device, the steam compressor unit is a centrifugal compressor.

[0032] Compared with the prior art, the advantages of this invention are as follows:

[0033] 1. This invention can recover the sensible heat of the condensate after the distillation process, and flash distill out some steam as flood steam. After vapor-liquid separation and pressurization, it can be used directly, which can reduce the amount of fresh high-temperature steam used, reduce process energy consumption, and play a role in energy saving and consumption reduction.

[0034] 2. The device of the present invention is driven by electricity only, and does not produce CO2 and NOx during the steam production process, thus avoiding thermal pollution of the ecological environment. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the condensate direct reuse device according to an embodiment of the present invention;

[0037] The components are as follows: 01. Flash tank unit; 02. Flash tank steam outlet; 03. Flash tank circulation inlet; 04. Flash tank circulation outlet; 05. Flash tank condensate outlet; 06. Flash tank drain outlet; 07. Flash tank drain pipe; 08. Level gauge; 09. Flash tank return water inlet; 10. Flash tank outlet; 11. Flash tank outlet connecting pipe; 12. Cooling jet pump; 13. Vapor-liquid separation unit; 14. Vapor-liquid separator steam inlet; 15. Vapor-liquid separator liquid outlet; 16. First electric switch valve; 17. Vapor-liquid separator cooling return water inlet; 18. Steam compressor unit. Yuan; 19. Steam compressor inlet; 20. Steam compressor outlet; 21. Steam compressor motor; 22. Steam compressor cooling water inlet pipe; 23. Cooling water connection pipe; 24. Steam inlet pipe; 25. Distillation unit; 26. Steam compressor outlet connection pipe; 27. Flash tank steam outlet connection pipe; 28. Circulating water pump; 29. ​​First electric regulating valve; 30. Second electric regulating valve; 31. Vapor-liquid separator drain connection pipe; 32. Vapor-liquid separator steam outlet; 33. Steam compressor cooling water outlet pipe; 34. Vapor-liquid separator liquid outlet pipe. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0039] Example:

[0040] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, in the embodiments of this invention are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0041] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0042] In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0043] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0044] See Figure 1This invention provides a device for direct condensate recycling, which can recover and reuse high-temperature condensate, achieving energy saving and consumption reduction. It may include a condensate input unit, a flash tank unit 01, a vapor-liquid separation unit 13, and a steam compressor unit 18. The condensate input unit receives steam at a temperature higher than a set point to heat materials within the unit, releasing heat to form high-temperature condensate. The flash tank unit 01 receives the high-temperature condensate from the condensate input unit and uses it for depressurization flash evaporation to obtain low-pressure saturated steam and saturated condensate. The vapor-liquid separation unit 13 receives the low-pressure saturated steam from the flash tank unit 01 and uses it to separate liquid water from the low-pressure saturated steam. The steam compressor unit receives low-temperature, low-pressure steam from the vapor-liquid separation unit 13, heats it to form high-temperature, high-pressure steam, and returns it to the condensate input unit. In this embodiment, the high-temperature condensate undergoes flash evaporation in the flash tank unit 01, vapor-liquid separation in the vapor-liquid separation unit 13, and pressurization and heating in the steam compressor unit 18 to form fresh steam that returns to the condensate input unit. During this process, the sensible heat of the condensate after the distillation process can be recovered, and some of the flashed steam is used as flooded steam. After vapor-liquid separation, it can be directly used under pressure, which can reduce the amount of fresh high-temperature steam used and reduce process energy consumption. In addition, the device of the present invention is driven only by electricity and does not produce CO2 and NOx during the steam production process, thus avoiding thermal pollution to the ecological environment.

[0045] See you again Figure 1 The condensate input unit includes a distillation unit 25, which is provided with a steam inlet pipe 24 connected to the water vapor compression unit. The flash tank unit 01 has a flash tank steam outlet 02 connected to the vapor-liquid separation unit 13, a flash tank circulation inlet 03 connected to the bottom of the condensate input unit, a flash tank circulation outlet 04, a flash tank condensate outlet 05, and a flash tank drain outlet 06 located at the bottom. A first electric regulating valve 29 is provided upstream of the flash tank circulation inlet 03 and downstream of the flash tank circulation outlet 04; a second electric regulating valve 30 is provided downstream of the flash tank condensate outlet 05; and the flash tank drain outlet 06 is connected to a drain outlet via a flash tank drain pipe 07.

[0046] In the above embodiments, the flash tank unit 01 is further provided with a level gauge 08, which is used to adjust the opening degree of the first electric regulating valve 29 and the second electric regulating valve 30.

[0047] In the above embodiments, the flash tank unit 01 further includes a flash tank return water inlet 09 connected to the vapor-liquid separation unit 13 and a flash tank outlet 10 connected to the steam compressor unit 18. The flash tank outlet 10 is provided with a flash tank outlet connecting pipe 11, which is connected to the steam compressor unit 18 via a steam compressor cooling water inlet pipe 22. A cooling jet pump 12 is provided downstream of the flash tank outlet 10. Furthermore, a circulating water pump 28 is provided upstream of the flash tank circulation inlet 03 and downstream of the first electric regulating valve 29.

[0048] See you again Figure 1 The vapor-liquid separation unit 13 includes: a vapor outlet 32 ​​and a cooling water return port 17 connected to the vapor compression unit; and a vapor inlet 14 and a liquid outlet 15 connected to the flash tank unit 01. The vapor inlet 14 is connected to the flash tank steam outlet 02 via a flash tank steam outlet connecting pipe 27, and the liquid outlet 15 is connected to the flash tank return port 09 via a vapor outlet liquid outlet pipe 34. Additionally, the bottom of the vapor-liquid separation unit 13 is connected to a drain outlet via a vapor-liquid separator drain connecting pipe 31, which is equipped with a first electric switch valve 16.

[0049] See you again Figure 1 The steam compressor unit 18 includes: a steam compressor inlet 19 connected to the steam outlet 32 ​​of the vapor-liquid separator, a cooling water connection pipe 23 connected to the cooling water of the water pump, a steam compressor motor 21, and a steam compressor outlet 20 connected to the condensate input unit. The steam compressor outlet 20 is connected to the steam inlet pipe 24 via a steam compressor outlet connection pipe 26. The steam compressor unit 18 is also connected to the vapor-liquid separator cooling return water inlet 17 of the vapor-liquid separation unit 13 via a steam compressor cooling water outlet pipe 33. For example, the steam compressor unit 18 may be a centrifugal compressor.

[0050] To better understand the present invention, the working process of the device is described below.

[0051] Fresh high-temperature steam enters the distillation unit 25 through the steam inlet pipe 24. The steam heats the material in the distillation unit 25, releasing heat energy and turning into high-temperature condensate. The high-temperature condensate flows to the bottom of the distillation unit 25 to form the high-temperature tower bottom liquid.

[0052] The liquid at the bottom of the high-temperature tower enters the flash tank unit 01 through the action of the circulating water pump 28. The high-temperature condensate is depressurized and flashed in the flash tank unit 01 to obtain low-pressure saturated steam and saturated condensate. The low-pressure saturated steam enters the vapor-liquid separation unit 13 through the flash tank steam outlet 02 and the flash tank steam outlet connecting pipe 27. The level gauge 08 controls the opening of the first electric regulating valve 29 and the second electric regulating valve 30 to regulate the flow rate of high-temperature condensate entering the flash tank unit 01 and low-temperature condensate exiting the flash tank unit 01.

[0053] Low-temperature steam enters the steam-liquid separation unit 13 through the steam inlet 14 of the steam-liquid separator. After steam-liquid separation, the saturated low-pressure steam enters the steam compression unit from the top of the steam-liquid separation unit 13 through the steam outlet 32 ​​of the steam-liquid separator and the steam compressor inlet 19.

[0054] The low-pressure steam is transformed into high-temperature and high-pressure steam by the steam compressor unit and discharged from the steam compressor outlet 20. It then enters the distillation unit 25 through the steam compressor outlet connecting pipe 26 and the steam inlet pipe 24, forming a working cycle.

[0055] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0056] The above embodiments are merely illustrative of the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made based on the essence of the content of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A device for direct condensate recycling, characterized in that, It includes a condensate inlet unit, a flash tank unit, a vapor-liquid separator unit, and a steam compressor unit, among which, The condensate input unit receives steam at a temperature higher than the set temperature, which is used to heat the material located in the unit to release heat energy and form high-temperature condensate. The flash tank unit receives high-temperature condensate from the condensate input unit and uses it for depressurization flash evaporation to obtain low-pressure saturated steam and saturated condensate; The vapor-liquid separation unit receives low-pressure saturated steam from the flash tank unit and is used to separate liquid water from the low-pressure saturated steam, and... The steam compressor unit receives low-temperature, low-pressure steam from the vapor-liquid separation unit, which is used to heat the steam to form high-temperature, high-pressure steam and return it to the condensate input unit. The flash tank unit also has: The flash tank return water inlet is connected to the vapor-liquid separation unit; The flash tank outlet is connected to the steam compressor unit. The flash tank outlet is provided with a flash tank outlet connecting pipe. The flash tank outlet connecting pipe is connected to the steam compressor unit through the steam compressor cooling water inlet pipe. A cooling jet pump is provided downstream of the flash tank outlet. The vapor-liquid separation unit has: The vapor outlet and cooling water return port of the vapor-liquid separator are connected to the steam compressor unit. The vapor-liquid separator unit is connected to a vapor-liquid separator steam inlet and a vapor-liquid separator liquid outlet. The vapor-liquid separator steam inlet is connected to the vapor outlet of the flash tank via a vapor outlet connecting pipe, and the vapor-liquid separator liquid outlet is connected to the flash tank return water inlet via a vapor-liquid separator liquid outlet pipe.

2. The condensate direct reuse device according to claim 1, characterized in that, The condensate input unit includes: The distillation unit is equipped with a steam inlet pipe that connects to the steam compressor unit.

3. The condensate direct reuse device according to claim 2, characterized in that, The flash tank unit has: The flash tank steam outlet is connected to the vapor-liquid separation unit; The flash tank circulation inlet, flash tank circulation outlet, and flash tank condensate outlet are connected to the bottom of the condensate input unit. A first electric regulating valve is provided upstream of the flash tank circulation inlet and downstream of the flash tank circulation outlet; a second electric regulating valve is provided downstream of the flash tank condensate outlet. A flash tank drain port is located at the bottom, and the flash tank drain port is connected to the drain outlet via a flash tank drain pipe.

4. The condensate direct reuse device according to claim 3, characterized in that, The flash tank unit is also equipped with a level gauge to adjust the opening degree of the first electric regulating valve and the second electric regulating valve.

5. The condensate direct reuse device according to claim 3, characterized in that, The bottom of the vapor-liquid separation unit is connected to the drain outlet via a vapor-liquid separator drain connection pipe, and a first electric switch valve is provided on the vapor-liquid separator drain connection pipe.

6. The condensate direct reuse device according to claim 2, characterized in that, The steam compressor unit has: The steam compressor inlet is connected to the steam outlet of the vapor-liquid separator; A cooling water connection pipe connected to the cooling water of the water pump; Steam compressor motor; as well as, The steam compressor outlet is connected to the condensate input unit, and the steam compressor outlet is connected to the steam inlet pipe via a steam compressor outlet connecting pipe.

7. The condensate direct reuse device according to claim 3, characterized in that, A circulating water pump is also provided upstream of the circulation inlet of the flash tank and downstream of the first electric regulating valve.

8. The condensate direct reuse device according to claim 1, characterized in that, The steam compressor unit is a centrifugal compressor.

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