CN112283687A - Steam return water exchange system - Google Patents
Steam return water exchange system Download PDFInfo
- Publication number
- CN112283687A CN112283687A CN202011105188.8A CN202011105188A CN112283687A CN 112283687 A CN112283687 A CN 112283687A CN 202011105188 A CN202011105188 A CN 202011105188A CN 112283687 A CN112283687 A CN 112283687A
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- China
- Prior art keywords
- gate valve
- pipeline
- steam
- exchange system
- regulating valve
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B33/00—Steam-generation plants, e.g. comprising steam boilers of different types in mutual association
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B35/00—Control systems for steam boilers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D11/00—Feed-water supply not provided for in other main groups
- F22D11/02—Arrangements of feed-water pumps
- F22D11/06—Arrangements of feed-water pumps for returning condensate to boiler
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Water Supply & Treatment (AREA)
- Pipeline Systems (AREA)
Abstract
The invention discloses a steam backwater exchange system, which comprises a pipeline for medium transmission, wherein one end of the pipeline is a medium input end, and the other end of the pipeline is a medium output end; the pipeline is sequentially provided with a first gate valve and a flow regulating valve group along the transmission direction of the medium; the flow regulating valve group comprises a second gate valve, a regulating valve and a third gate valve which are sequentially connected on the pipeline. Before the system works, the regulating valve needs to be initially set to regulate the required water retention, and water flows into the regulating valve after being regulated, so that the problem of unbalanced quality of steam and water among the units is solved.
Description
Technical Field
The invention relates to a steam backwater system, in particular to a steam backwater exchange system.
Background
At present, a cogeneration unit is mainly based on fixed heat and power, a plurality of cogeneration units are generally present in the same industrial park, and the capacity of some units is not fully developed in the early stage due to the transformation of a boiler hearth for some technical reasons. In addition, some units not only can meet the requirement of industrial application heat supply, but also have more surplus steam supply capacity. In order to solve the above problems, a coordination exchange system between the units is usually adopted, and the coordination problem is solved by using a steam exchange system.
Because the main steam pipeline that supplies steam to scarce energy supply unit is extracted steam from the main steam pipeline that has surplus energy supply unit to returning and supplying steam, must arouse steam, water unbalanced mass between the unit, so need a return water scheme that can solve this problem urgently.
Disclosure of Invention
The embodiment of the invention aims to provide a steam return water exchange system which can effectively solve the problem of unbalanced quality of steam and water among units.
In order to achieve the above object, an embodiment of the present invention provides a steam backwater exchange system, including a pipeline for medium transmission, where one end of the pipeline is a medium input end, and the other end of the pipeline is a medium output end;
the pipeline is sequentially provided with a first gate valve and a flow regulating valve group along the transmission direction of the medium;
the flow regulating valve group comprises a second gate valve, a regulating valve and a third gate valve which are sequentially connected on the pipeline.
Before the system works, the regulating valve needs to be initially set to regulate the required water retention, and water flows into the regulating valve after being regulated, so that the problem of unbalanced quality of steam and water among the units is solved.
As an improvement of the scheme, a fourth gate valve is further arranged on the pipeline and is connected with the flow regulating valve group in parallel.
As an improvement of the above scheme, the third gate valve is an electric vacuum gate valve.
As an improvement of the above scheme, the fourth gate valve is an electric vacuum gate valve.
As an improvement of the scheme, a flowmeter is arranged on the pipeline.
As an improvement of the above scheme, the first gate valve and the second gate valve are both electric gate valves.
Drawings
Fig. 1 is a schematic diagram of an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic diagram of an embodiment of the present invention.
A steam backwater exchange system comprises a pipeline 1 for medium transmission, wherein one end of the pipeline 1 is a medium input end 2, and the other end of the pipeline 1 is a medium output end 3.
In this embodiment, the medium is water.
The pipeline 1 is provided with a first gate valve 4 and a flow control valve 6 set in sequence along the direction of conveyance of the medium.
The flow control valve 6 set includes a second gate valve 5, a control valve 6, and a third gate valve 7 connected in sequence to the pipe 1.
At present, a cogeneration unit is mainly based on fixed heat and power, a plurality of cogeneration units are generally present in the same industrial park, and the output of some units cannot reach full capacity in the early stage due to some technical reasons. In addition, some units not only can meet the requirement of industrial application heat supply, but also have more surplus steam supply capacity. In order to solve the above problems, a coordination exchange system between the units is usually adopted, and the coordination problem is solved by using a steam exchange system. Because the return steam is extracted from the main steam pipeline with the surplus energy supply unit to the main steam pipeline with the shortage energy supply unit, the mass imbalance of steam and water between the units is caused. In the embodiment, two units are exemplarily shown, the first unit is a unit from which steam is extracted, and the amount of water is reduced because the steam is extracted; the second unit is an input steam unit, and the water amount is increased due to the input of steam; therefore, the system is connected to the condenser of the first unit from the outlet of the condensate pump of the second unit.
When the system works normally, the medium input end 2 is connected with a condenser of a second unit; the medium output end 3 is connected with a condenser of the first unit. The water pressure of the condensed water pump of the second unit is larger than that of the condenser of the first unit. When the system works, water flows into a pipeline 1 of the system from the medium input end 2, and finally flows out of the medium output end 3 to a condenser of the first unit through the first gate valve 4, the second gate valve 5, the regulating valve 6 and the third gate valve 7. Before the system works, the regulating valve 6 needs to be initially set to regulate the required water retaining quantity, and water flows into the regulating valve 6 and flows to the condenser of the first unit after being regulated, so that the problem of unbalanced quality of steam and water among the units is solved.
More preferably, the pipeline 1 is further provided with a fourth gate valve 8, and the fourth gate valve 8 is connected with the flow regulating valve 6 in parallel. When the regulating valve 6 fails, the valve is opened, the medium bypasses, and the second gate valve 5 and the third gate valve 7 of the main path are closed, so that the regulating valve 6 is conveniently maintained; when the main path regulating valve 6 is in normal operation, i.e. when the system is in normal operation, the fourth gate valve 8 is in a closed state.
Preferably, the third gate valve 7 and the fourth gate valve 8 are both electric vacuum gate valves. The third gate valve 7 and the fourth gate valve 8 are connected to a condenser having a negative pressure, and therefore, a vacuum gate valve is used.
Preferably, the pipe 1 is provided with a flow meter 9. The flowmeter 9 is convenient for measuring the flow of the backwater, so that the backwater amount can be monitored, and the backwater amount can be used as a flow input signal of the regulating valve 6.
Preferably, the first gate valve 4 and the second gate valve 5 are both electric gate valves.
Under the control of DCS, the third gate valve 7 and the second gate valve 5 are opened simultaneously, and the regulating valve 6 is normally put into operation; the third gate valve 7 is closed simultaneously with the second gate valve 5, allowing the control valve 6 to be serviced. Thus requiring a motorized version.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (6)
1. The steam backwater exchange system is characterized by comprising a pipeline for medium transmission, wherein one end of the pipeline is a medium input end, and the other end of the pipeline is a medium output end;
the pipeline is sequentially provided with a first gate valve and a flow regulating valve group along the transmission direction of the medium;
the flow regulating valve group comprises a second gate valve, a regulating valve and a third gate valve which are sequentially connected on the pipeline.
2. The steam backwater exchange system of claim 1, wherein a fourth gate valve is further arranged on the pipeline, and the fourth gate valve is connected with the flow regulating valve group in parallel.
3. The steam return water exchange system of claim 1, wherein the third gate valve is an electric vacuum gate valve.
4. The steam return water exchange system of claim 2, wherein the fourth gate valve is an electric vacuum gate valve.
5. The steam return water exchange system of claim 1, wherein a flow meter is arranged on the pipeline.
6. The steam backwater exchange system of claim 1, wherein the first gate valve and the second gate valve are both electric gate valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011105188.8A CN112283687A (en) | 2020-10-15 | 2020-10-15 | Steam return water exchange system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011105188.8A CN112283687A (en) | 2020-10-15 | 2020-10-15 | Steam return water exchange system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112283687A true CN112283687A (en) | 2021-01-29 |
Family
ID=74497018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011105188.8A Pending CN112283687A (en) | 2020-10-15 | 2020-10-15 | Steam return water exchange system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112283687A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB820255A (en) * | 1957-01-31 | 1959-09-16 | Sulzer Ag | Steam power plants employing forced-flow steam generators |
| CN103633644A (en) * | 2013-11-19 | 2014-03-12 | 日照钢铁有限公司 | Power grid impact load automatic balancing device and balancing method |
| CN207122894U (en) * | 2017-06-21 | 2018-03-20 | 山东琦泉能源科技有限公司 | A kind of modular condensed water in boiler pipeline balance system |
| CN208535962U (en) * | 2018-07-19 | 2019-02-22 | 郭伟 | One kind being used for steam turbine condensed water water replanishing device |
-
2020
- 2020-10-15 CN CN202011105188.8A patent/CN112283687A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB820255A (en) * | 1957-01-31 | 1959-09-16 | Sulzer Ag | Steam power plants employing forced-flow steam generators |
| CN103633644A (en) * | 2013-11-19 | 2014-03-12 | 日照钢铁有限公司 | Power grid impact load automatic balancing device and balancing method |
| CN207122894U (en) * | 2017-06-21 | 2018-03-20 | 山东琦泉能源科技有限公司 | A kind of modular condensed water in boiler pipeline balance system |
| CN208535962U (en) * | 2018-07-19 | 2019-02-22 | 郭伟 | One kind being used for steam turbine condensed water water replanishing device |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210129 |
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| RJ01 | Rejection of invention patent application after publication |