Integrated evaporator integrating supercooling and preheating functions
By designing an integrated evaporator that combines subcooling and preheating functions, the problem of existing autoclave evaporators being unable to achieve multiple processes has been solved. This has enabled the equipment to be multifunctional and integrated, saving space and improving operational safety.
Patent Information
- Application Number
- CN202520265260.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-19
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-02-19
AI Technical Summary
Existing autoclave evaporators cannot achieve the four processes of condensation, subcooling, preheating and evaporation in one device, resulting in large equipment footprint and operational risks.
Design an integrated evaporator that combines subcooling and preheating functions. By setting up condenser tube bundles, subcooling tube bundles, and preheating shells on the tube side and shell side, the condensation, subcooling, preheating and evaporation processes are integrated, reducing the number of equipment.
It enables the simultaneous completion of condensation, subcooling, preheating and evaporation processes in one device, reducing the space occupied by the device and improving the operability and operational safety of the device.
Smart Images
Figure CN223716378U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to cauldron type evaporimeter technical field, especially relate to a kind of integrated evaporimeter of supercooling and preheating function. BACKGROUND
[0002] In the electric power and chemical industry, there is a heat conversion equipment, which is generally high-parameter steam conversion into low-parameter steam, so as to meet the multi-parameter steam demand in the plant, and the integrated evaporimeter is a kind of equipment to meet the multi-functional integration.
[0003] When high-parameter steam is converted into low-parameter steam by heat exchange, in order to fully utilize the energy of heat source steam, high-pressure steam needs to pass through condensation and supercooling processes in sequence. In order to increase the supercooling depth of heat source, the cold side medium needs to pass through preheating and evaporation processes in sequence. However, the cauldron type evaporimeter in the prior art can only realize condensation or supercooling process on the tube side, and can only realize evaporation process on the shell side. It is impossible to realize condensation, supercooling, preheating and evaporation processes in one equipment, so at least two equipments are needed to realize these four processes, which occupies a large space and has a large operation risk. SUMMARY
[0004] Therefore, in order to solve the problem that the cauldron type evaporimeter in the prior art can only realize condensation or supercooling process on the tube side, and can only realize evaporation process on the shell side, it is impossible to realize condensation, supercooling, preheating and evaporation processes in one equipment, so at least two equipments are needed to realize these four processes, which occupies a large space and has a large operation risk, the utility model provides a kind of integrated evaporimeter of supercooling and preheating function.
[0005] To achieve the above purpose, the utility model adopts the following technical scheme:
[0006] An integrated evaporimeter of supercooling and preheating function comprises:
[0007] A tube box;
[0008] A tube plate is fixedly arranged in the tube box and divides the space in the tube box into a tube side space and a shell side space;
[0009] A condensation tube bundle and a supercooling tube bundle are both fixedly arranged in the tube plate and located in the shell side space; the supercooling tube bundle is located below the condensation tube bundle;
[0010] A first partition plate and a second partition plate are arranged at intervals to divide the tube side space into an inlet water cavity, a storage water cavity and an outlet water cavity; the inlet water cavity is communicated with the inlet of the condensation tube bundle, the outlet of the condensation tube bundle is communicated with the storage water cavity, the storage water cavity is communicated with the inlet of the supercooling tube bundle, and the outlet of the supercooling tube bundle is communicated with the outlet water cavity;
[0011] A tube side inlet connection pipe and a tube side outlet connection pipe, the tube side inlet connection pipe being in communication with the water inlet chamber, and the tube side outlet connection pipe being in communication with the water outlet chamber;
[0012] A preheating shell, arranged below the lower half of the supercooling tube bundle, and a preheating chamber arranged in the preheating shell;
[0013] A shell side inlet connection pipe and a shell side outlet connection pipe, the shell side inlet connection pipe being in communication with the inlet of the preheating chamber, the outlet of the preheating chamber being in communication with a shell side space, and the shell side space being in communication with the shell side outlet connection pipe.
[0014] As a preferred solution of the integrated evaporator with the functions of supercooling and preheating, the water level in the water storage chamber is higher than the inlet of the supercooling tube bundle.
[0015] As a preferred solution of the integrated evaporator with the functions of supercooling and preheating, the integrated evaporator with the functions of supercooling and preheating is further provided with an exhaust pipe in communication with the water storage chamber.
[0016] As a preferred solution of the integrated evaporator with the functions of supercooling and preheating, a plurality of baffles are arranged in the preheating chamber.
[0017] As a preferred solution of the integrated evaporator with the functions of supercooling and preheating, the condensing tube bundle comprises a plurality of first U-shaped tubes, the inlets of the plurality of first U-shaped tubes being in communication with the water inlet chamber, and the outlets of the plurality of first U-shaped tubes being in communication with the water storage chamber.
[0018] As a preferred solution of the integrated evaporator with the functions of supercooling and preheating, the supercooling tube bundle comprises a plurality of second U-shaped tubes, the inlets of the plurality of second U-shaped tubes being in communication with the water storage chamber, and the outlets of the plurality of second U-shaped tubes being in communication with the water outlet chamber.
[0019] As a preferred solution of the integrated evaporator with the functions of supercooling and preheating, the tube side inlet connection pipe is arranged above the tube box, the tube side outlet connection pipe is arranged below the tube box, the shell side inlet connection pipe is arranged below the tube box, and the shell side outlet connection pipe is arranged above the tube box.
[0020] As a preferred solution of the integrated evaporator with the functions of supercooling and preheating, the water level of the shell side space is higher than the height of the condensing tube bundle.
[0021] As a preferred solution of the integrated evaporator with the functions of supercooling and preheating, a sealing plate is fixed between the preheating shell and the tube box.
[0022] As a preferred solution of the integrated evaporator with the functions of supercooling and preheating, two support columns are arranged below the tube box.
[0023] Compared with the prior art, the integrated evaporator with supercooling and preheating functions has the beneficial effects that:
[0024] The utility model provides a kind of integrated evaporator with supercooling and preheating functions, the integrated evaporator with supercooling and preheating functions, high temperature heat source steam is from pipe side inlet connector pipe into to water inlet cavity, again from water inlet cavity into to condensing tube bundle, condenses into water after heat exchange with the saturated water of shell side space in condensing tube bundle, flows out condensing tube bundle and enters water storage level cavity, condensing water in water storage level cavity enters supercooling tube bundle, flows out to water outlet cavity after heat exchange, finally from pipe side outlet connector pipe flows out.
[0025] In shell side, cold water is from shell side inlet connector pipe into to preheating shell, carries out heat exchange with condensing water in supercooling tube bundle in preheating shell, then flows into shell side space, finally from shell side outlet connector pipe flows out.In shell side space, all condensing tube bundle and part of supercooling tube bundle directly contact saturated water, participate in evaporation process.When condensing water in pipe side is cooled to approach saturated water temperature of shell side in supercooling tube bundle, it cannot be further cooled by heat exchange with saturated water at this time.Setting shell side feedwater preheating section as demarcation point, i.e.to set preheating shell between this demarcation point and the outlet of supercooling tube bundle, to realize preheating of shell side feedwater and deep supercooling of condensing water in pipe side.Preheating shell is pasted to supercooling tube bundle, and is covered in lower half of supercooling tube bundle, and is separated from pool boiling in shell side space.The medium in preheating shell can carry out heat exchange with the medium in lower half of supercooling tube bundle.
[0026] The integrated evaporator with supercooling and preheating functions is three-section heat exchanger, in condensing tube bundle in pipe side, condensation process is carried out, and steam is changed into condensing water.In supercooling tube bundle, supercooling process is carried out, and condensing water is cooled again to become supercooled water.In preheating shell in shell side, preheating process is carried out, and cold water in preheating shell is heated to approach saturated water after heat exchange with supercooled water near the outlet of supercooling tube bundle, and then enters shell side space, and shell side space is standard pool boiling, and condensing tube bundle outside carries out evaporation process, and the upper half of supercooling tube bundle outside carries out evaporation process.The integrated evaporator with supercooling and preheating functions meets supercooling and preheating process on the basis of realizing condensation and evaporation process of conventional evaporator, realizes multifunctional integration, reduces equipment quantity, and improves equipment operability. BRIEF DESCRIPTION OF DRAWINGS
[0027] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated in and constitute a part of this application. The embodiments illustrated in the drawings are provided to explain embodiments of the present application and not to limit the present application. In the drawings:
[0028] Figure 1It is the structural schematic view of the integrated evaporator with supercooling and preheating functions along a first visual angle provided by the embodiment of the utility model.
[0029] Figure 2 It is the structural schematic view of the integrated evaporator with supercooling and preheating functions along a second visual angle provided by the embodiment of the utility model.
[0030] In the drawing,
[0031] 1, tube box;2, tube plate;3, first partition plate;4, second partition plate;5, condensing tube bundle;6, supercooling tube bundle;7, preheating shell;8, tube side inlet connector;9, tube side outlet connector;10, shell side inlet connector;11, shell side outlet connector;12, exhaust pipe;13, support;71, baffle;101, water inlet cavity;102, water storage cavity;103, water outlet cavity. Specific embodiments
[0032] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. It should be explained that, in the case of no conflict, the embodiments and the features in the embodiments in the utility model can be combined with each other, and the described embodiments are only a part of the embodiments in the utility model, not all the embodiments.
[0033] In the description of the utility model, unless another explicit provision and limitation, the terms "connected", "connected", "fixed" should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or be integrated;Can be mechanically connected, or can be electrically connected;Can be directly connected, or indirectly connected through an intermediate medium, can be the communication inside two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0034] In the utility model, unless another explicit provision and limitation, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0035] In the description of the present embodiment, the terms "upper", "lower", "right", and the like orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.
[0036] Referring to Figure 1 and Figure 2 To illustrate the present embodiment, the present application provides an integrated evaporator with supercooling and preheating functions, which comprises a tube box 1, a tube plate 2, a condensing tube bundle 5, a supercooling tube bundle 6, a first partition plate 3, a second partition plate 4, a tube side inlet connecting pipe 8, a tube side outlet connecting pipe 9, a preheating shell 7, a shell side inlet connecting pipe 10 and a shell side outlet connecting pipe 11. The tube plate 2 is fixedly arranged in the tube box 1 and divides the space in the tube box 1 into a tube side space and a shell side space. The condensing tube bundle 5 and the supercooling tube bundle 6 are both fixedly arranged on the tube plate 2 and are both located in the shell side space. The supercooling tube bundle 6 is located below the condensing tube bundle 5. The first partition plate 3 and the second partition plate 4 are arranged at intervals and divide the tube side space into a water inlet cavity 101, a water storage cavity 102 and a water outlet cavity 103. The water inlet cavity 101 is in communication with the inlet of the condensing tube bundle 5, the outlet of the condensing tube bundle 5 is in communication with the water storage cavity 102, the water storage cavity 102 is in communication with the inlet of the supercooling tube bundle 6, and the outlet of the supercooling tube bundle 6 is in communication with the water outlet cavity 103. The tube side inlet connecting pipe 8 is in communication with the water inlet cavity 101, and the tube side outlet connecting pipe 9 is in communication with the water outlet cavity 103. The preheating shell 7 is arranged in the lower half of the supercooling tube bundle 6, and a preheating cavity is arranged in the preheating shell 7. The shell side inlet connecting pipe 10 is in communication with the inlet of the preheating cavity, the outlet of the preheating cavity is in communication with the shell side space, and the shell side space is in communication with the shell side outlet connecting pipe 11.
[0037] The integrated evaporator with supercooling and preheating functions, high-temperature heat source steam enters the water inlet cavity 101 from the tube side inlet connecting pipe 8, then enters the condensing tube bundle 5 from the water inlet cavity 101, and is condensed into water after heat exchange with the saturated water in the shell side space in the condensing tube bundle 5, flows out of the condensing tube bundle 5 and enters the water storage cavity 102. The condensed water in the water storage cavity 102 enters the supercooling tube bundle 6, flows out to the water outlet cavity 103 after heat exchange, and finally flows out from the tube side outlet connecting pipe 9.
[0038] On the shell side, cold water enters the preheating shell 7 from the shell side inlet connection 10, exchanges heat with the subcooled water in the subcooled tube bundle 6, and then flows into the shell side space and finally flows out from the shell side outlet connection 11. In the shell side space, the entire condensing tube bundle 5 and part of the subcooled tube bundle 6 directly contact with the saturated water and participate in the evaporation process. When the condensing water on the tube side is cooled to near the temperature of the saturated water in the subcooled tube bundle 6, it cannot be further cooled by continuing to exchange heat with the saturated water. With this as the dividing point, the shell side feedwater preheating section is set, that is, the preheating shell 7 is arranged between the dividing point and the outlet of the subcooled tube bundle 6, to realize the preheating of the shell side feedwater and the deep subcooling of the condensing water on the tube side. The preheating shell 7 is attached to the subcooled tube bundle 6 and covers the lower half of the subcooled tube bundle 6, separated from the pool boiling in the shell side space. The medium in the preheating shell 7 can exchange heat with the medium in the lower half of the subcooled tube bundle 6.
[0039] The integrated evaporator integrating the subcooling and preheating functions is a three-section heat exchanger. On the tube side, the condensing process is carried out in the condensing tube bundle 5 to change steam into condensing water. The subcooling process is carried out in the subcooled tube bundle 6 to change the condensing water into subcooled water after being cooled again. On the shell side, the preheating process is carried out in the preheating shell 7. The cold water in the preheating shell 7 exchanges heat with the subcooled water near the outlet of the subcooled tube bundle 6. The cold water in the preheating shell 7 is heated to near the saturated water and then enters the shell side space. The shell side space is a standard pool boiling. The evaporation process is carried out outside the condensing tube bundle 5 and the upper half of the subcooled tube bundle 6. The integrated evaporator integrating the subcooling and preheating functions, on the basis of realizing the condensing and evaporation processes in the conventional evaporator, also meets the subcooling and preheating processes, realizes the integration of multiple functions, reduces the number of equipment, and improves the operability of the equipment.
[0040] Optionally, the water level in the water storage cavity 102 is higher than the inlet of the subcooled tube bundle 6. In the water storage cavity 102, a certain working liquid level needs to be maintained, preferably to ensure that the entire subcooled tube bundle 6 is immersed, to avoid failure of the subcooled tube bundle 6.
[0041] Optionally, the water level in the shell side space is higher than the height of the condensing tube bundle 5. The saturated water in the shell side space submerges the condensing tube bundle 5 and the subcooled tube bundle 6.
[0042] Optionally, the integrated evaporator integrating the subcooling and preheating functions is also provided with an exhaust pipe 12 in communication with the water storage cavity 102. The upper part of the tube side space carries out the condensing process, and steam will continuously condense into water. However, the non-condensable gas in the steam cannot be condensed, such as nitrogen. If this part of the non-condensable gas cannot be discharged, it will accumulate more and more, eventually affecting the condensing process. Therefore, in order to avoid the accumulation of non-condensable gas affecting the condensing heat transfer, the tube side is provided with an exhaust pipe 12 in communication with the water storage cavity 102, to continuously discharge this part of the non-condensable gas.
[0043] Optionally, a plurality of baffles 71 are arranged in the preheating cavity, and the plurality of baffles 71 are arranged in intervals and staggered. The heat transfer efficiency of convection can be improved.
[0044] Optionally, a sealing plate is arranged between the preheating shell 7 and the tube box 1. The sealing plate is used to realize the sealing between the preheating shell 7 and the tube box 1. The shell side medium enters the preheating shell 7 directly from the shell side inlet pipe 10, and then enters the shell side space after passing through the preheating cavity.
[0045] Optionally, the tube side inlet pipe 8 is arranged above the tube box 1, the tube side outlet pipe 9 is arranged below the tube box 1, the shell side inlet pipe 10 is arranged below the tube box 1, and the shell side outlet pipe 11 is arranged above the tube box 1. The flow of the tube side medium and the flow of the shell side medium are staggered, and the heat exchange efficiency is improved. The shell side medium enters the preheating shell from the end close to the tube plate 2 to realize pure counterflow heat exchange.
[0046] Optionally, the condenser tube bundle 5 comprises a plurality of first U-shaped tubes, the inlets of the plurality of first U-shaped tubes are communicated with the water inlet cavity 101, and the outlets of the plurality of first U-shaped tubes are communicated with the water storage cavity 102. The heat exchange efficiency can be improved.
[0047] Optionally, the supercooling tube bundle 6 comprises a plurality of second U-shaped tubes, the inlets of the plurality of second U-shaped tubes are communicated with the water storage cavity 102, and the outlets of the plurality of second U-shaped tubes are communicated with the water outlet cavity 103. The heat exchange efficiency can be improved.
[0048] Optionally, two support columns 13 are arranged in intervals below the tube box 1. The support columns 13 are used to support the tube box 1.
[0049] Obviously, the above disclosed embodiments of the utility model are only used for helping to explain the utility model. The embodiments do not describe all the details, and the utility model is not limited to the specific implementation mode. According to the content of the specification, many modifications and changes can be made. The embodiments are selected and specifically described in the specification, so as to better explain the principle and practical application of the utility model, so that the person skilled in the art can well understand and utilize the utility model. Here, it is not necessary and impossible to exhaust all the implementation modes.
Claims
1. An integrated evaporator combining subcooling and preheating functions, characterized in that, include: Pipe box (1); Tube sheet (2) is fixedly installed inside tube box (1) and divides the space inside tube box (1) into tube side space and shell side space; The condenser tube bundle (5) and the subcooler tube bundle (6) are both fixedly installed on the tube sheet (2) and are both located in the shell-side space; the subcooler tube bundle (6) is located below the condenser tube bundle (5); The first partition plate (3) and the second partition plate (4) are arranged at intervals to divide the pipe side space into a water inlet chamber (101), a water storage chamber (102) and a water outlet chamber (103); the water inlet chamber (101) is connected to the inlet of the condenser tube bundle (5), the outlet of the condenser tube bundle (5) is connected to the water storage chamber (102), the water storage chamber (102) is connected to the inlet of the subcooled tube bundle (6), and the outlet of the subcooled tube bundle (6) is connected to the water outlet chamber (103); Pipe-side inlet pipe (8) and pipe-side outlet pipe (9), the pipe-side inlet pipe (8) is connected to the water inlet chamber (101), and the pipe-side outlet pipe (9) is connected to the water outlet chamber (103); A preheating shell (7) is provided in the lower half of the subcooled tube bundle (6), and a preheating cavity is provided inside the preheating shell (7); Shell-side inlet pipe (10) and shell-side outlet pipe (11), the shell-side inlet pipe (10) is connected to the inlet of the preset cavity, the outlet of the preheating cavity is connected to the shell-side space, and the shell-side space is connected to the shell-side outlet pipe (11).
2. The integrated evaporator with subcooling and preheating functions according to claim 1, characterized in that: The water level in the water storage chamber (102) is higher than the inlet of the supercooled tube bundle (6).
3. The integrated evaporator with subcooling and preheating functions according to claim 1, characterized in that: It is also equipped with an exhaust pipe (12), which is connected to the water storage chamber (102).
4. The integrated evaporator with subcooling and preheating functions according to claim 1, characterized in that: The preheating chamber is provided with multiple baffles (71), which are spaced apart and staggered.
5. The integrated evaporator with subcooling and preheating functions according to claim 1, characterized in that: The condenser tube bundle (5) includes a plurality of first U-shaped tubes, the inlets of which are all connected to the water inlet chamber (101), and the outlets of which are all connected to the water storage chamber (102).
6. The integrated evaporator with subcooling and preheating functions according to claim 1, characterized in that: The subcooled tube bundle (6) includes a plurality of second U-shaped tubes, the inlets of which are all connected to the water storage chamber (102), and the outlets of which are all connected to the water outlet chamber (103).
7. The integrated evaporator with subcooling and preheating functions according to claim 1, characterized in that: The pipe-side inlet pipe (8) is located above the pipe box (1), the pipe-side outlet pipe (9) is located below the pipe box (1), the shell-side inlet pipe (10) is located below the pipe box (1), and the shell-side outlet pipe (11) is located above the pipe box (1).
8. The integrated evaporator with subcooling and preheating functions according to claim 1, characterized in that: The water level in the shell-side space is higher than the height of the condenser tube bundle (5).
9. The integrated evaporator with subcooling and preheating functions according to claim 1, characterized in that: A sealing plate is fixed between the preheating shell (7) and the tube box (1).
10. The integrated evaporator with subcooling and preheating functions according to claim 1, characterized in that: Two support pillars (13) are fixedly installed at intervals below the pipe box (1).