CN113446588B - Kettle type evaporator with overheating function - Google Patents
Kettle type evaporator with overheating function Download PDFInfo
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- CN113446588B CN113446588B CN202110726045.7A CN202110726045A CN113446588B CN 113446588 B CN113446588 B CN 113446588B CN 202110726045 A CN202110726045 A CN 202110726045A CN 113446588 B CN113446588 B CN 113446588B
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- heating medium
- tube
- tube bundle
- cylinder body
- side cylinder
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
- F22B31/08—Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/10—Water tubes; Accessories therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/26—Steam-separating arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G3/00—Steam superheaters characterised by constructional features; Details of component parts thereof
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention provides a kettle type evaporator with overheating function, which is characterized by comprising a shell side cylinder body and a tube side cylinder body, wherein a tube plate is arranged between the shell side cylinder body and the tube side cylinder body, wherein: an evaporation tube bundle and a superheater tube bundle are arranged in the shell side cylinder body, the evaporation tube bundle and the superheater tube bundle are connected to the tube plate, and the shell side cylinder body is provided with a superheated steam outlet and a water supply inlet; the tube side cylinder body is provided with a heating medium inlet and a heating medium outlet, and a cavity in the tube side cylinder body is communicated with the evaporation tube bundle and the superheat tube bundle. The invention has the following beneficial effects: 1. the number of devices is reduced; 2. the complexity of the system arrangement is reduced; 3. the operation control difficulty is reduced; 4. the arrangement of pipelines is reduced; 5. reducing the flow resistance of the steam; 6. the difficulty of field arrangement of the equipment is reduced.
Description
Technical Field
The invention relates to a kettle type evaporator with a superheating function, which is used for reducing the complexity of an evaporation system and the equipment cost and reducing the difficulty of equipment arrangement and belongs to the field of heat exchanger equipment design of a power station.
Background
The kettle evaporation technology is one of the mainstream technologies widely applied in the current steam generation system, and the technology is mature. The existing kettle type steam generation technology is realized by separating two processes of the evaporation of feed water and the superheating of steam, and the evaporation process is shown in figure 1.
Although the existing kettle type evaporation technology is mature, certain problems also exist. Firstly, the two functions of feedwater evaporation and steam superheating are realized separately, so that the number of equipment is increased, an additional pipeline is arranged, the pipeline arrangement and system control are relatively complex, and the steam resistance is increased due to a pipeline between an evaporator and a superheater; in addition, when the field arrangement space is tight, the increase of the number of devices increases the difficulty of field device arrangement.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the existing kettle evaporation technology must separate two functions of evaporation and overheating.
In order to solve the technical problem, the technical scheme of the invention is to provide a kettle-type evaporator with a superheating function, which is characterized by comprising a shell side barrel body and a tube side barrel body, wherein a tube plate is arranged between the shell side barrel body and the tube side barrel body, wherein:
an evaporation tube bundle and a superheater tube bundle are arranged in the shell side cylinder body, the evaporation tube bundle and the superheater tube bundle are connected to the tube plate, and the shell side cylinder body is provided with a superheated steam outlet and a water supply inlet;
the tube side cylinder body is provided with a heating medium inlet and a heating medium outlet, and a cavity in the tube side cylinder body is communicated with the evaporation tube bundle and the superheater tube bundle;
heating medium enters the cavity of the tube side cylinder body through the heating medium inlet and then enters the evaporation tube bundle to heat the feed water introduced into the shell side cylinder body through the feed water inlet into saturated steam; the heating medium after heat exchange in the evaporation tube bundle returns to the cavity in the tube side cylinder body after exiting the evaporation tube bundle and then enters the superheated tube bundle, saturated steam is heated into superheated steam by the superheated tube bundle with the heating medium, and the superheated steam exits the shell side cylinder body through a superheated steam outlet; the heating medium after heat exchange in the superheat tube bundle returns to the cavity in the tube side cylinder body after flowing out of the superheat tube bundle and then flows out of the tube side cylinder body through the heating medium outlet.
Preferably, the cavity in the tube side barrel body is divided into three parts which are not communicated with each other by a partition board, and the three parts are respectively defined as a first cavity, a second cavity and a third cavity, the first cavity is communicated with the heating medium inlet, and the heating medium enters the first cavity through the heating medium inlet and then enters the overheating tube bundle; the heat-exchanged heating medium out of the overheating pipe bundle enters a second chamber and then enters the overheating pipe bundle; the heat-exchanged heating medium out of the overheating pipe bundle enters a third chamber; the third chamber is communicated with the heating medium outlet, and the heating medium is discharged out of the tube side barrel body through the heating medium outlet.
Preferably, a wire mesh demister is further arranged in the tube side barrel body and located between the evaporation tube bundle and the overheating tube bundle, and liquid water carried in the saturated steam is separated through the wire mesh demister so as to achieve the purpose of dehumidification.
Preferably, in order to ensure the dehumidification effect, the distance value between the wire mesh demister and the evaporation tube bundle is set according to different parameters of the saturated steam.
The invention overcomes the defect that the two functions of evaporation and overheating must be separated in the existing kettle type evaporation technology, and can reduce the complexity of the system, the difficulty of operation control, the investment cost of equipment and the difficulty of equipment arrangement. Compared with the prior art, the invention has the following beneficial effects: 1. the number of devices is reduced; 2. the complexity of the system arrangement is reduced; 3. the operation control difficulty is reduced; 4. the arrangement of pipelines is reduced; 5. reducing the flow resistance of the steam; 6. the difficulty of field arrangement of the equipment is reduced.
Drawings
FIG. 1 is an evaporation flow diagram of a conventional kettle-type steam generation technique;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a flow chart of the evaporation process of the present invention.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
As shown in fig. 2, the kettle-type evaporator with superheating function provided by the invention mainly comprises a heating medium inlet 1, a heating medium outlet 2, a tube side pass partition plate 3, a superheated steam outlet 4, a water supply inlet 5, an evaporation tube bundle 6, a superheating tube bundle 7, a wire mesh demister 8, a tube plate 9, a shell side barrel 10, a tube side barrel 11 and other parts.
The evaporator tube bundle 6 and the superheater tube bundle 7 are connected to a tube sheet 9 and are placed in a shell-side shaft 10. In order to separate the liquid water carried in the evaporated steam, a wire mesh demister 8 is arranged between the evaporator tube bundle 6 and the superheater tube bundle 7. In order to guarantee the dehumidification effect, the distance H value between the wire mesh demister 8 and the evaporation tube bundle 6 needs to be guaranteed according to different parameters of steam. The feed water is heated into saturated steam through the evaporator tube bundle 6 through the feed water inlet 5, then is dehumidified through the wire mesh demister 8 and enters the superheated tube bundle 7, is heated into superheated steam, and then is discharged out of the evaporator through the superheated steam outlet 4. The heating medium for heating the feed water is provided in the tube side cylinder 11, and the cavity in the tube side cylinder 11 is divided into three chambers by the pass partition 3. The heating medium first enters the first chamber in the tube side barrel 11 through the heating medium inlet 1 and then enters the superheating tube bundle 7 to heat the saturated steam. And the steam enters a second chamber in the tube side barrel body 11 after coming out of the overheating tube bundle 7 and then enters the evaporation tube bundle 6 to heat the feedwater to generate steam. And enters the third chamber in the tube side cylinder 11 after coming out of the evaporation tube bundle 6, and finally exits the evaporator from the heating medium outlet 2.
Through the design of the structure and the flow path shown in fig. 2, as shown in fig. 3, the steam generation technology of the invention integrates two processes of the evaporation of the feed water and the superheating of the steam into a single device, thereby realizing the integration of the two processes of the evaporation of the feed water and the superheating of the steam.
Claims (4)
1. The utility model provides a kettle-type evaporator with overheat function, its characterized in that, including shell side stack shell and tube side stack shell, be equipped with the tube sheet between shell side stack shell and the tube side stack shell, wherein:
an evaporation tube bundle and a superheater tube bundle are arranged in the shell side cylinder body, the evaporation tube bundle and the superheater tube bundle are connected to the tube plate, and the shell side cylinder body is provided with a superheated steam outlet and a water supply inlet;
the tube side cylinder body is provided with a heating medium inlet and a heating medium outlet, and a cavity in the tube side cylinder body is communicated with the evaporation tube bundle and the superheater tube bundle;
heating medium enters the cavity of the tube side cylinder body through the heating medium inlet and then enters the evaporation tube bundle to heat the feed water introduced into the shell side cylinder body through the feed water inlet into saturated steam; the heating medium after heat exchange in the evaporation tube bundle returns to the cavity in the tube side cylinder body after exiting the evaporation tube bundle and then enters the superheated tube bundle, saturated steam is heated into superheated steam by the superheated tube bundle with the heating medium, and the superheated steam exits the shell side cylinder body through a superheated steam outlet; the heating medium after heat exchange in the superheat tube bundle returns to the cavity in the tube side cylinder body after exiting the superheat tube bundle, and then exits the tube side cylinder body through the heating medium outlet.
2. The kettle-type evaporator with superheating function according to claim 1, wherein the cavity in the tube side barrel body is divided into three parts which are not communicated with each other by a partition board, and the three parts are respectively defined as a first cavity, a second cavity and a third cavity, the first cavity is communicated with the heating medium inlet, and the heating medium enters the superheating tube bundle after entering the first cavity through the heating medium inlet; the heat-exchanged heating medium out of the overheating pipe bundle enters a second chamber and then enters the overheating pipe bundle; the heat-exchanged heating medium out of the overheating pipe bundle enters a third chamber; the third chamber is communicated with the heating medium outlet, and the heating medium is discharged out of the tube side barrel body through the heating medium outlet.
3. The kettle-type evaporator with superheating function according to claim 1, wherein a wire mesh demister is further arranged in the tube side barrel body and is positioned between the evaporation tube bundle and the superheating tube bundle, and liquid water carried in the saturated steam is separated through the wire mesh demister so as to achieve the purpose of dehumidification.
4. The kettle-type evaporator with superheating function according to claim 3, wherein the distance value between the wire mesh demister and the evaporation tube bundle is set according to different parameters of the saturated steam in order to ensure the dehumidification effect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110726045.7A CN113446588B (en) | 2021-06-29 | 2021-06-29 | Kettle type evaporator with overheating function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110726045.7A CN113446588B (en) | 2021-06-29 | 2021-06-29 | Kettle type evaporator with overheating function |
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| Publication Number | Publication Date |
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| CN113446588A CN113446588A (en) | 2021-09-28 |
| CN113446588B true CN113446588B (en) | 2022-09-23 |
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| CN202110726045.7A Active CN113446588B (en) | 2021-06-29 | 2021-06-29 | Kettle type evaporator with overheating function |
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| CN114152113A (en) * | 2021-11-03 | 2022-03-08 | 华能核能技术研究院有限公司 | High temperature resistant type heat exchanger |
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| GB556382A (en) * | 1942-09-24 | 1943-10-01 | York Ice Machinery Corp | Improvements in or relating to evaporators |
| CN206176823U (en) * | 2016-10-18 | 2017-05-17 | 上海蓝滨石化设备有限责任公司 | Tubular flooded evaporator |
| CN206709052U (en) * | 2017-04-07 | 2017-12-05 | 上海电气电站设备有限公司 | A kind of pure counter-current steam cooler |
| CN210773611U (en) * | 2019-09-18 | 2020-06-16 | 中石化南京工程有限公司 | Novel evaporator for sulfuric acid low-temperature waste heat recovery device |
| CN112229233A (en) * | 2020-10-20 | 2021-01-15 | 上海电气电站设备有限公司 | Two-section type heat conduction oil recovery heat exchanger for groove type photo-thermal power plant |
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