CN109682227A - Air-Cooling Island system and its antifreeze method - Google Patents
Air-Cooling Island system and its antifreeze method Download PDFInfo
- Publication number
- CN109682227A CN109682227A CN201811604268.0A CN201811604268A CN109682227A CN 109682227 A CN109682227 A CN 109682227A CN 201811604268 A CN201811604268 A CN 201811604268A CN 109682227 A CN109682227 A CN 109682227A
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- China
- Prior art keywords
- tube bank
- temperature
- air
- control unit
- thermometric
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
- F28B9/005—Auxiliary systems, arrangements, or devices for protection against freezing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B1/00—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B11/00—Controlling arrangements with features specially adapted for condensers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The present invention provides a kind of Air-Cooling Island system and its antifreeze methods.The Air-Cooling Island system includes steam-distributing pipe, fair current tube bank, condensate pipe, adverse current tube bank and control unit, by the temperature for measuring fair current tube bank in fair current tube bank the first thermometric portion of setting of Air-Cooling Island system, with adverse current tube bank on the second thermometric portion is set with measure adverse current tube bank temperature, control unit is electrically connected with the first thermometric portion, the second thermometric portion and steam turbine, control unit controls the working load of steam turbine according to the measurement temperature in the first thermometric portion, the second thermometric portion, to increase or reduce the discharge capacity of steam, Air-Cooling Island system is prevented to be frozen.
Description
Technical field
The present invention relates to steam turbine equipment technical fields, in particular to a kind of Air-Cooling Island system and its antifreeze method.
Background technique
For 660MW grade unit, Air-Cooling Island film-cooled heat is generally located on 1,700,000 square meters or more, and unit load is kept
It, can be on the basis of reducing air cooling blower fan frequency when more than 450MW (70~80% load setting), each blower of gradually stopping transport；
When unit load is lower than 450MW (55~0% load setting), when depth regulating units (40~50%) 300MW, be not required to isolation 1,
8 column steam discharge butterfly valves.
No matter which kind of method of operation, all nothing more than Air-Cooling Island higher temperature field is kept, i.e. Air-Cooling Island bulk temperature is not less than 0
DEG C when, air-cooled heat-transfer surface would not freeze, since Air-Cooling Island itself highly reaches 40 meters of ground or more, in addition air flow
The influence in direction, the environment temperature of air-cooled heat-transfer surface everywhere have differences, and the resistance and steam sendout in heat exchange facial canal are also deposited
In deviation, this results in being easy to happen Air-Cooling Island heat-transfer surface partial freezing when environment temperature is low, unit load is low.In winter
Under operating condition, high temperature field is kept just to can guarantee that air-cooled heat-transfer surface does not freeze, and therefore coal consumption for power generation then greatly improves, because
How this, both kept Air-Cooling Island that can run under low back pressure, also to guarantee that Air-Cooling Island does not freeze to be a problem to be solved.
Summary of the invention
It is in the prior art to solve the main purpose of the present invention is to provide a kind of Air-Cooling Island system and its antifreeze method
Air-Cooling Island is easy frozen problem under low pressure operation.
To achieve the goals above, according to an aspect of the invention, there is provided a kind of Air-Cooling Island system, Air-Cooling Island system
It include: steam-distributing pipe, steam-distributing pipe with steam turbine for being connected, with letting through steam；Fair current tube bank, fair current tube bank is more
A, the first end of multiple fair current tube banks is connected with steam-distributing pipe；Condensate pipe, condensate pipe are located at steam-distributing pipe
Lower section, offers import department and outlet portion on condensate pipe, the second end of multiple fair currents tube banks with the import department of condensate pipe
It is connected；Adverse current is restrained, and the first end of adverse current tube bank is connected with the outlet portion of condensate pipe；Control unit, control unit be used for
Steamer mechatronics；Wherein, the first thermometric portion is provided in fair current tube bank to measure the temperature of fair current tube bank, set in adverse current tube bank
The second thermometric portion is equipped with to measure the temperature of adverse current tube bank, the first thermometric portion and the second thermometric portion are electrically connected with control unit, are controlled
The temperature that portion processed is measured according to the first thermometric portion and the second thermometric portion is to control steam turbine.
Further, multiple fair currents are interbank every setting, and the distance between the axis of two neighboring fair current tube bank is d1, d1
< D, D ∈ [1.5m, 2.5m].
Further, the first thermometric portion is multiple, and multiple first thermometrics portion is electrically connected with control unit, multiple first thermometrics
Portion is arranged correspondingly with multiple fair currents tube bank.
Further, Air-Cooling Island system further includes exhaust tube, and exhaust tube is taken out between steam-distributing pipe and condensate pipe
Tracheae is connected with the second end of adverse current tube bank.
Further, the second end of adverse current tube bank offers bleeding point, and exhaust tube is connected with bleeding point, the second thermometric portion
Between bleeding point and condensate pipe, along the extending direction of adverse current tube bank, the distance between the second thermometric portion and bleeding point are
D2, d2 ∈ [0.5m, 1.5m].
Further, the first thermometric portion and/or the second thermometric portion are infrared radiation thermometer.
According to another aspect of the present invention, a kind of antifreeze method of Air-Cooling Island system is provided, antifreeze method is with above-mentioned
Air-Cooling Island system, antifreeze method is the following steps are included: measure the first temperature t1 of fair current tube bank by the first thermometric portion, by the
The second temperature t2 of two thermometric portions measurement adverse current tube bank；Control unit is according to the first temperature t1 and second temperature t2 adjustment steam turbine
Unit load.
Further, unit load of the control unit according to the first temperature t1 and second temperature t2 adjustment steam turbine, specific packet
Include: control unit judges whether the first temperature t1 is located in the first preset temperature range T1 respectively, and judges that second temperature t2 is
No to be located in the second preset temperature range T2, as t1 ∈ T1, and when t2 ∈ T2, control unit controls steam turbine normal operation, whenAnd/orWhen, control unit controls steam turbine and adjusts unit load, so that t1 ∈ T1 and t2 ∈ T2.
Further, T1=[- 5 DEG C, 0 DEG C], T2=[0 DEG C, 15 DEG C].
Further, the first thermometric portion and/or the second thermometric portion are primary every progress thermometric operation in four hours.
It applies the technical scheme of the present invention, it is suitable to measure by the first thermometric portion of fair current tube bank setting in Air-Cooling Island system
The temperature of flowing bundle, and the second thermometric portion is set to measure the temperature of adverse current tube bank in adverse current tube bank, control unit and first are surveyed
Warm portion, the second thermometric portion and steam turbine are electrically connected, and control unit is according to the measurement temperature control in the first thermometric portion, the second thermometric portion
The working load of steam turbine processed prevents Air-Cooling Island system to be frozen to increase or reduce the discharge capacity of steam.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present invention, and of the invention shows
Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 shows the structural schematic diagram of the embodiment of Air-Cooling Island system according to the present invention.
Wherein, the above drawings include the following reference numerals:
10, steam-distributing pipe；
20, fair current is restrained；
30, condensate pipe；
40, adverse current is restrained；41, bleeding point；
50, exhaust tube；
60, the first thermometric portion；
70, the second thermometric portion.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
As shown in Figure 1, according to an embodiment of the invention, providing a kind of Air-Cooling Island system.
As shown in Figure 1, the Air-Cooling Island system, including steam-distributing pipe 10, fair current restrain 20, condensate pipe 30, reverse stream pipe
Beam 40 and control unit, steam-distributing pipe 10 with steam turbine for being connected, with letting through steam, fair current tube bank 20 be it is multiple, it is multiple
The first end of fair current tube bank 20 is connected with steam-distributing pipe 10, and condensate pipe 30 is located at the lower section of steam-distributing pipe 10, coagulates
Bear water and offer import department and outlet portion on pipe 30, the second end of multiple fair currents tube bank 20 with import department's phase of condensate pipe 30
The first end of connection, adverse current tube bank 40 is connected with the outlet portion of condensate pipe 30, and control unit is used for and steamer mechatronics；Its
In, the first thermometric portion 60 is provided in fair current tube bank 20 to measure the temperature of fair current tube bank 20, is provided with the in adverse current tube bank 40
To measure the temperature that adverse current restrains 40, the first thermometric portion 60 and the second thermometric portion 70 are electrically connected with control unit in two thermometric portions 70,
The temperature that control unit is measured according to the first thermometric portion 60 and the second thermometric portion 70 is to control steam turbine.
In the present embodiment, it is restrained by fair current tube bank the first thermometric portion of setting in Air-Cooling Island system with measuring fair current
Temperature, and the second thermometric portion is set to measure the temperature of adverse current tube bank, control unit and the first thermometric portion, second in adverse current tube bank
Thermometric portion and steam turbine are electrically connected, and control unit controls steam turbine according to the measurement temperature in the first thermometric portion, the second thermometric portion
Working load prevent Air-Cooling Island system to be frozen to increase or reduce the discharge capacity of steam.
In the present embodiment, 20 interval setting of multiple fair currents tube bank, between the axis of two neighboring fair current tube bank 20 away from
From for d1, d1 < D, D ∈ [1.5m, 2.5m].Setting can make the temperature close of two neighboring fair current tube bank 20 in this way, will not produce
Excessive temperature differentials phenomenon is restrained in raw different fair currents, that is, ensure that the accuracy for the temperature that the first thermometric portion 60 measures.
Wherein, the first thermometric portion 60 is multiple, and multiple first thermometrics portion 60 is electrically connected with control unit, multiple first thermometrics
Portion 60 is arranged correspondingly with multiple fair currents tube bank 20.Setting can restrain 20 to each fair current and carry out temperature survey in this way
Amount, is electrically connected by control unit with each thermometric portion, can prevent local temperature variation abnormality from influencing control of the control unit to steam turbine
System.
In addition, Air-Cooling Island system further includes exhaust tube 50, exhaust tube 50 be located at steam-distributing pipe 10 and condensate pipe 30 it
Between, exhaust tube 50 is connected with the second end of adverse current tube bank 40.Setting is convenient for the condensed air of steam passing through pumping in this way
Pipe 50 is discharged.
In the present embodiment, the second end of adverse current tube bank 40 offers bleeding point 41, and exhaust tube 50 is connected with bleeding point 41
Logical, the second thermometric portion 70 is between bleeding point 41 and condensate pipe 30, along the extending direction of adverse current tube bank 40, the second thermometric portion
The distance between 70 and bleeding point 41 are d2, d2 ∈ [0.5m, 1.5m].Accurately adverse current can be restrained by the second thermometric portion 70
40 progress thermometrics are to react the temperature of steam or air in adverse current tube bank 40, and temperature measuring point selects the 0.5m below bleeding point 41
To 1.5m, it can prevent exhaust tube 50 from influencing on the temperature in the second thermometric portion 70.Ensure water in the admixture of gas of vacuum pump extraction
Quantity of steam is minimum, and forms low back pressure in turbine discharge cooling system, guarantees Air-Cooling Island bulk temperature field, is guaranteeing sky
Under the premise of cool island is uncongealable, unit vacuum is improved, reduces coal consumption for power generation.
In the present embodiment, the first thermometric portion 60 or the second thermometric portion 70 are infrared radiation thermometer, naturally it is also possible to both
For infrared radiation thermometer.
The present invention also provides a kind of antifreeze method of Air-Cooling Island system, antifreeze method is used for above-mentioned Air-Cooling Island system,
Antifreeze method measures the first temperature t1 that fair current restrains 20 the following steps are included: passing through the first thermometric portion 60, passes through the second thermometric
The second temperature t2 of the measurement of portion 70 adverse current tube bank 40；Control unit adjusts the machine of steam turbine according to the first temperature t1 and second temperature t2
Group load.
Further, unit load of the control unit according to the first temperature t1 and second temperature t2 adjustment steam turbine, specific packet
Include: control unit judges whether the first temperature t1 is located in the first preset temperature range T1 respectively, and judges that second temperature t2 is
No to be located in the second preset temperature range T2, as t1 ∈ T1, and when t2 ∈ T2, control unit controls steam turbine normal operation, whenAnd/orWhen, control unit controls steam turbine and adjusts unit load, so that t1 ∈ T1 and t2 ∈ T2.Wherein, T1=
[- 5 DEG C, 0 DEG C], T2=[0 DEG C, 15 DEG C].In addition, the first thermometric portion 60 and/or the second thermometric portion 70 were surveyed every four hours
Warm operation is primary.
In the present embodiment, temp.-sensing wire can be increased at the thermometric of adverse current tube bank 40 and at the thermometric of fair current tube bank 20, when
Temperature issues alarm, fair current tube bank 20 is solidifying not at 0 DEG C to 15 DEG C at 0.5 meter to 1.5 meters under extraction opening for adverse current tube bank 40
Temperature is born water on pipe at 1.5 meters to 2.5 meters not at -5 DEG C to 0 DEG C, also issues alarm, operations staff is by adjusting guaranteeing empty
Cold the safe and economic operation.
Directly cooling unit is in winter in -25 DEG C to 0 DEG C operational process, and condensation point is displaced downwardly to the limit, and unit is in back pressure
10kPa is down to hereinafter, unit performance driving economy is improved, because the every raising 1kPa of vacuum, unit output are increased by rated load
1%, it can multiple 6.6MW load.When environment temperature is lower than 2 DEG C under operating condition in winter, no matter load height, unit operation
Period surveys a temperature using infrared radiation thermometer to be measured position of Air-Cooling Island in regular 4 hours, and temperature measuring point selection is empty in operation
Under the bleeding point of cold column adverse current region at about one meter, air-cooled column fair current, two meters of countercurrent zone or less are run.Leeward bleeding point 1 ± 0.5
Temperature control is at 0 DEG C to 15 DEG C as shown, part heat-transfer surface can be occurred by running the temperature in air-cooled column fair current area at rice
It in -50 DEG C to 0 DEG C, such as -2 DEG C, but must be lateral separation and spacing at this time no more than 1.5 meters to 2.5 meters, such winter
Back pressure is substantially in 10kPa or less.
These are only the preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of Air-Cooling Island system characterized by comprising
Steam-distributing pipe (10), the steam-distributing pipe (10) with steam turbine for being connected, with letting through steam；
(20) are restrained in fair current, fair current tube bank (20) be it is multiple, the first end of multiple fair currents tube banks (20) with the steam
Distribution pipe (10) is connected；
Condensate pipe (30), the condensate pipe (30) are located at the lower section of the steam-distributing pipe (10), the condensate pipe
(30) offer import department and outlet portion on, the second end of multiple fair currents tube banks (20) with the condensate pipe (30)
Import department is connected；
The first end of adverse current tube bank (40), the adverse current tube bank (40) is connected with the outlet portion of the condensate pipe (30)；
Control unit, the control unit are used for and the steamer mechatronics；
Wherein, the first thermometric portion (60) is provided in fair current tube bank (20) to measure the temperature of the fair current tube bank (20),
The second thermometric portion (70) is provided on the adverse current tube bank (40) to measure the temperature of the adverse current tube bank (40), and described first surveys
Warm portion (60) and second thermometric portion (70) are electrically connected with the control unit, and the control unit is according to first thermometric portion
(60) and the temperature that measures of second thermometric portion (70) is to control the steam turbine.
2. Air-Cooling Island system according to claim 1, which is characterized in that multiple fair current tube bank (20) interval settings,
The distance between the axis of two neighboring fair current tube bank (20) is d1, d1 < D, D ∈ [1.5m, 2.5m].
3. Air-Cooling Island system according to claim 2, which is characterized in that first thermometric portion (60) be it is multiple, it is multiple
First thermometric portion (60) is electrically connected with the control unit, multiple first thermometric portions (60) and multiple fair current pipes
Beam (20) is arranged correspondingly.
4. Air-Cooling Island system according to claim 1, which is characterized in that the Air-Cooling Island system further includes exhaust tube
(50), the exhaust tube (50) is between the steam-distributing pipe (10) and the condensate pipe (30), the exhaust tube
(50) it is connected with the second end of adverse current tube bank (40).
5. Air-Cooling Island system according to claim 4, which is characterized in that the second end of the adverse current tube bank (40) offers
Bleeding point (41), the exhaust tube (50) are connected with the bleeding point (41), and second thermometric portion (70) is located at the pumping
Between port (41) and the condensate pipe (30), along the extending direction of adverse current tube bank (40), second thermometric portion
It (70) is d2, d2 ∈ [0.5m, 1.5m] with the distance between the bleeding point (41).
6. Air-Cooling Island system according to claim 1, which is characterized in that first thermometric portion (60) and/or described
Two thermometric portions (70) are infrared radiation thermometer.
7. a kind of antifreeze method of Air-Cooling Island system, the antifreeze method is used for Air-Cooling Island as claimed in any one of claims 1 to 6
System, which is characterized in that the antifreeze method the following steps are included:
The first temperature t1 that fair current tube bank (20) is measured by the first thermometric portion (60) measures adverse current by the second thermometric portion (70)
Restrain the second temperature t2 of (40)；
Control unit adjusts the unit load of steam turbine according to the first temperature t1 and second temperature t2.
8. the method according to the description of claim 7 is characterized in that control unit is according to the first temperature t1 and second temperature
The unit load for spending t2 adjustment steam turbine, specifically includes:
The control unit judges whether the first temperature t1 is located in the first preset temperature range T1 respectively, and described in judgement
Whether second temperature t2 is located in the second preset temperature range T2, and as t1 ∈ T1, and when t2 ∈ T2, the control unit controls institute
Steam turbine normal operation is stated, whenAnd/orWhen, the control unit controls the steam turbine and adjusts unit load, so that
T1 ∈ T1 and t2 ∈ T2.
9. according to the method described in claim 8, it is characterized in that, T1=[- 5 DEG C, 0 DEG C], T2=[0 DEG C, 15 DEG C].
10. the method according to the description of claim 7 is characterized in that first thermometric portion (60) and/or second thermometric
Portion (70) is primary every progress thermometric operation in four hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811604268.0A CN109682227A (en) | 2018-12-26 | 2018-12-26 | Air-Cooling Island system and its antifreeze method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811604268.0A CN109682227A (en) | 2018-12-26 | 2018-12-26 | Air-Cooling Island system and its antifreeze method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109682227A true CN109682227A (en) | 2019-04-26 |
Family
ID=66189828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811604268.0A Pending CN109682227A (en) | 2018-12-26 | 2018-12-26 | Air-Cooling Island system and its antifreeze method |
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| Country | Link |
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| CN (1) | CN109682227A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110542326A (en) * | 2019-09-25 | 2019-12-06 | 双良节能系统股份有限公司 | Direct air-cooling condensing system and control method for pumping out non-condensable gas |
| CN113532141A (en) * | 2020-04-20 | 2021-10-22 | 齐秀 | Anti-freezing method for air cooling island in alpine region |
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| CN108645523A (en) * | 2018-07-23 | 2018-10-12 | 中国大唐集团科技工程有限公司 | A kind of Direct Air-Cooled temperature field on-Line Monitor Device and method |
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| CN203274955U (en) * | 2013-04-09 | 2013-11-06 | 郭民臣 | Air cooling anti-freezing monitoring device |
| CN106225501A (en) * | 2016-08-31 | 2016-12-14 | 华能白山煤矸石发电有限公司 | A kind of Freezing of Direct Air-Cooled Condenser Unit system and method |
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| CN110542326A (en) * | 2019-09-25 | 2019-12-06 | 双良节能系统股份有限公司 | Direct air-cooling condensing system and control method for pumping out non-condensable gas |
| CN113532141A (en) * | 2020-04-20 | 2021-10-22 | 齐秀 | Anti-freezing method for air cooling island in alpine region |
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