CN111397389A - Prevent frozen direct air cooling system of power plant of tube bank - Google Patents
Prevent frozen direct air cooling system of power plant of tube bank Download PDFInfo
- Publication number
- CN111397389A CN111397389A CN202010199013.1A CN202010199013A CN111397389A CN 111397389 A CN111397389 A CN 111397389A CN 202010199013 A CN202010199013 A CN 202010199013A CN 111397389 A CN111397389 A CN 111397389A
- Authority
- CN
- China
- Prior art keywords
- tube bundle
- air cooling
- trolley
- countercurrent
- heating
- Prior art date
- 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
- 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
- F28B1/06—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser using air or other gas as the cooling medium
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- 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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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
- F28B9/02—Auxiliary systems, arrangements, or devices for feeding steam or vapour to condensers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
- F28B9/10—Auxiliary systems, arrangements, or devices for extracting, cooling, and removing non-condensable gases
Abstract
The invention relates to the technical field of direct air cooling systems of power plants, in particular to a direct air cooling system of a power plant for preventing a tube bundle from freezing, and aims to solve the technical problem that a countercurrent tube bundle of the existing direct air cooling system is easy to freeze. The following technical scheme is adopted: a slide rail is additionally arranged on the surface of the countercurrent tube bundle, a trolley is embedded on the slide rail, and an infrared sensor is integrated on the trolley; the device also comprises a tile anti-freezing device, wherein the tile anti-freezing device comprises two layers of arc-surface heating sheets, an insulating film is arranged on the outer side of the outer heating sheet, a noncondensing gas tube bundle is arranged between the two heating sheets, one end of the noncondensing gas tube bundle is communicated with the vacuumizing device, and the other end of the noncondensing gas tube bundle is communicated with the outside; the heating device also comprises a control module, the control module is in wireless connection with the trolley to control the action of the trolley, and the control module can wirelessly receive signals collected by the infrared sensor so as to control the action of the heating sheet.
Description
Technical Field
The invention relates to the technical field of direct air cooling systems of power plants, in particular to a direct air cooling system of a power plant, which can prevent a tube bundle from freezing.
Background
In order to reduce the consumption of water resources and solve the problem of water resource shortage in coal-rich and water-deficient areas in the north, the direct air cooling system is widely applied. However, the freezing problem of the winter heat dissipation tube bundle of the direct air cooling unit is very common, and becomes a main potential safety hazard for the winter operation of the air cooling unit. At present, single or multiple rows of flat steel core tubes and snakelike aluminum alloy fins are mostly adopted as air cooling fins of a direct air cooling unit, and although certain freezing resistance is achieved, in actual operation, because parameters such as unit load, ambient temperature, wind direction, vacuum degree and operation mode are in a state of changing at any time and multiple variables are mutually coupled, the problem that the cooling fins are frozen still occurs due to lack of operation experience of many power plants, and mainly a countercurrent tube bundle is easy to freeze.
Disclosure of Invention
The invention aims to solve the technical problem that the counter-flow tube bundle of the existing direct air cooling system is easy to freeze.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a direct air cooling system of a power plant for preventing a tube bundle from being frozen comprises an air cooling island, wherein the air cooling island is composed of a plurality of air cooling units, each air cooling unit comprises a steam distribution pipe, a downstream tube bundle, a condensation pipe, an upstream tube bundle and a vacuumizing device, the steam distribution pipe is communicated with the downstream tube bundle, the downstream tube bundle is communicated with the condensation pipe, the condensation pipe is communicated with the upstream tube bundle, the upstream tube bundle is communicated with the vacuumizing device, steam coming from a steam inlet sequentially enters the steam distribution pipe, the downstream tube bundle and the condensation pipe, then part of the steam is condensed into liquid in the condensation pipe to be discharged, and steam which is not condensed in the condensation pipe is pumped to the upstream tube bundle under the action of the vacuumizing device and is finally discharged; the surface of the countercurrent tube bundle is additionally provided with slide rails arranged along the length direction of the pipeline, a trolley capable of moving along the slide rails is embedded on the slide rails, an infrared sensor used for detecting the temperature of the corresponding pipeline is integrated on the trolley, and the temperature of each part of the countercurrent tube bundle can be detected through the movement of the trolley; the device is characterized by further comprising a tile anti-freezing device, wherein the tile anti-freezing device comprises two layers of heating sheets which are coaxially sleeved outside the countercurrent tube bundle in an annular mode, each heating sheet is arc-shaped, an insulating film is further arranged on the outer side of the outer heating sheet, a noncondensing gas tube bundle is arranged between the two heating sheets, the noncondensing gas tube bundle is of a hollow fan-ring columnar structure, one end of the noncondensing gas tube bundle is communicated with the vacuumizing device, and the other end of the noncondensing gas tube bundle is communicated with the outside; the heating device also comprises a control module, wherein the control module is in wireless connection with the trolley to control the action of the trolley, and the control module can wirelessly receive signals collected by the infrared sensor so as to control the action of the heating sheet.
The during operation, the dolly removes along the countercurrent tube bundle under control module's control, carries out temperature detection through infrared ray sensor to the different positions of countercurrent tube bundle, then gives control module with the signal wireless transmission who gathers, and the temperature signal that control module analysis detected controls the action of corresponding heating plate, if the temperature of certain countercurrent tube bundle is too high, then controls the heating plate stop work, if the temperature of certain countercurrent tube bundle is crossed lowly, then controls the heating plate start-up heating.
The invention has the beneficial effects that:
1) the temperature acquisition assembly, the control module and the tile anti-freezing device are arranged and matched to heat the countercurrent tube bundle in a targeted manner, so that the condition that the countercurrent tube bundle is frozen is effectively avoided;
2) the infrared sensor is arranged on the trolley, and then the control module wirelessly controls the trolley to move, so that the temperature of different positions of the countercurrent tube bundle is detected, the temperature acquisition is convenient, and the detection range is comprehensive;
3) the tile anti-freezing device adopts a structure of a heating sheet and a noncondensable gas tube bundle interlayer, after noncondensable gas is subjected to primary heat exchange in the countercurrent tube bundle, the noncondensable gas is pumped into the noncondensable gas tube bundle to be subjected to secondary heat exchange under the action of the vacuumizing device, the waste heat of the noncondensable gas can be fully utilized, and the energy is saved.
Drawings
FIG. 1 is a schematic view of the construction of the tile freeze protection device of the present invention;
FIG. 2 is a schematic view of the air cooling unit of the present invention;
fig. 3 is a schematic view of the air cooling island of the present invention.
In the figure:
1 → steam distribution pipe; 2 → streamwise tube bundle; 3 → condenser tube; 4 → countercurrent tube bundle; 5 → heating plate; 6 → an insulating film; 7 → non-condensing gas tube bundle; 8 → solar panels; 9 → horizontal axis wind turbine.
Detailed Description
Referring to fig. 1 to 2, the direct air cooling system for a power plant for preventing a tube bundle from freezing comprises an air cooling island, wherein the air cooling island is composed of a plurality of air cooling units, each air cooling unit comprises a steam distribution pipe 1, a downstream pipe bundle 2, a condensation pipe 3, a counter-flow pipe bundle 4 and a vacuumizing device, the steam distribution pipe 1 is communicated with the downstream pipe bundle 2, the downstream pipe bundle 2 is communicated with the condensation pipe 3, the condensation pipe 3 is communicated with the counter-flow pipe bundle 4, the counter-flow pipe bundle 4 is communicated with the vacuumizing device, sliding rails arranged along the length direction of a pipeline are additionally arranged on the surface of the counter-flow pipe bundle 4, and trolleys capable of moving along the sliding rails are embedded on the sliding rails, wherein the fixing mode of the sliding rails and the embedding mode of the trolleys are conventional technical means in the; an infrared sensor for detecting the temperature of the corresponding pipeline is integrated on the trolley; the device is characterized by further comprising a tile anti-freezing device, wherein the tile anti-freezing device comprises two layers of heating sheets 5 which are coaxially sleeved outside the countercurrent tube bundle 4 in an annular mode, each heating sheet 5 is in an arc surface shape, an insulating film 6 is further arranged on the outer side of the outer heating sheet 5, a noncondensing gas tube bundle 7 is arranged between the two heating sheets 5, the noncondensing gas tube bundle 7 is in a hollow fan-ring columnar structure, one end of the noncondensing gas tube bundle 7 is communicated with the vacuum-pumping device, and the other end of the noncondensing gas tube bundle 7 is; and a control module which is connected with the trolley in a wireless way to control the action of the trolley, wherein the wireless connection is a known technology, the principle of the wireless toy car is the same as that of a wireless toy car played by children, the control module can wirelessly receive signals collected by the infrared sensor so as to control the action of the heating plate 5, the wireless sensor sends signals, which is also a conventional technology, as long as the wireless sending module is integrated on the infrared sensor, the wireless receiving module is integrated on the control module, the control device can adopt wired electric connection to control the heating sheet 5, i.e. via a power line or the like, is not mentioned here because it is known to the skilled person how to design the connection between the heating plate and the control means, as long as the control means is told to receive a temperature signal to control the operation of the corresponding heating plate 5. During operation, the trolley moves along the countercurrent tube bundle 4 under the control of the control module, the infrared sensors are used for detecting the temperature of different positions of the countercurrent tube bundle 4, then the collected signals are wirelessly sent to the control module, the control module analyzes the detected temperature signals and controls the corresponding heating plates 5 to act, if the temperature of a certain countercurrent tube bundle 4 is too high, the heating plates 5 are controlled to stop working, and if the temperature of a certain countercurrent tube bundle 4 is too low, the heating plates 5 are controlled to start heating.
Further, the central angles of the heating plates 5 and the non-condensing gas tube bundle 7 are both 180 degrees, and the trolley is arranged on the other half surface of the counter flow tube bundle 4 which is not covered with the heating plates 5. The installation mode is an optimal installation mode, and not only can the space requirement of trolley installation be met, but also the requirement of the coverage area of the tile anti-freezing device can be met.
As shown in fig. 3, further, a solar panel 8 is arranged on the wind shielding wall of the air cooling island, and the solar panel 8 is electrically connected with the power supply system of the air cooling island; a plurality of horizontal axis wind turbines 9 are arranged below the air cooling island, and each horizontal axis wind turbine 9 is electrically connected with a power supply system of the air cooling island. The solar cell panel 8 and the horizontal axis wind turbine 9 can realize the power supply to the air cooling island by utilizing the complementarity of the solar energy and the wind energy of the air cooling island in time and space according to the environment requirement, thereby improving the energy utilization rate. The horizontal axis wind turbine 9 is the most developed and common wind turbine at home at present and is also a wind turbine with relatively mature technology. The wind wheel of the horizontal axis wind turbine 9 rotates around the horizontal axis, and when the horizontal axis wind turbine works, the rotating plane of the wind wheel is perpendicular to the wind direction. The blades on the wind wheel are vertically and radially arranged with the rotating shaft and form a certain angle on the rotating plane, so that the energy utilization efficiency is improved. The existing horizontal shaft wind turbine 9 has a single blade type, a double blade type, a three blade type and a multi-blade type, and the existing three-blade wind turbine is the most common and beautiful.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (4)
1. The utility model provides a prevent frozen direct air cooling system of power plant of tube bank, includes the air cooling island, the air cooling island comprises a plurality of air cooling units, and every air cooling unit all includes steam distribution pipe (1), following current tube bank (2), condenser pipe (3), countercurrent tube bank (4) and evacuating device, and steam distribution pipe (1) intercommunication following current tube bank (2), and following current tube bank (2) intercommunication condenser pipe (3), condenser pipe (3) intercommunication countercurrent tube bank (4), countercurrent tube bank (4) intercommunication evacuating device, its characterized in that: the surface of the countercurrent tube bundle (4) is additionally provided with slide rails arranged along the length direction of the pipeline, a trolley capable of moving along the slide rails is embedded on the slide rails, and an infrared sensor for detecting the temperature of the corresponding pipeline is integrated on the trolley; the anti-freezing device comprises two layers of heating sheets (5) which are coaxially sleeved outside the countercurrent tube bundle (4) in a ring manner, the heating sheets (5) are arc-surface-shaped, an insulating film (6) is arranged on the outer side of the outer heating sheet (5), a noncondensing gas tube bundle (7) is arranged between the two heating sheets (5), the noncondensing gas tube bundle (7) is of a hollow fan-ring columnar structure, one end of the noncondensing gas tube bundle (7) is communicated with the vacuumizing device, and the other end of the noncondensing gas tube bundle is communicated with the outside; the heating device also comprises a control module, wherein the control module is in wireless connection with the trolley to control the action of the trolley, and the control module can wirelessly receive signals collected by the infrared sensor so as to control the action of the heating sheet (5).
2. The direct air cooling system of a power plant for preventing freezing of a tube bundle of claim 1, wherein: the central angles of the heating sheets (5) and the noncondensable gas tube bundle (7) are all 180 degrees, and the trolley is arranged on the other half surface of the countercurrent tube bundle (4) which is not covered with the heating sheets (5).
3. The direct air cooling system of a power plant for preventing freezing of a tube bundle of claim 2, wherein: a solar panel (8) is arranged on the wind shielding wall of the air cooling island, and the solar panel (8) is electrically connected with a power supply system of the air cooling island.
4. The direct air cooling system of a power plant for preventing freezing of a tube bundle of claim 3, wherein: a plurality of horizontal axis wind turbines (9) are arranged below the air cooling island, and each horizontal axis wind turbine (9) is electrically connected with a power supply system of the air cooling island.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010199013.1A CN111397389B (en) | 2020-03-20 | 2020-03-20 | Prevent frozen direct air cooling system of power plant of tube bank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010199013.1A CN111397389B (en) | 2020-03-20 | 2020-03-20 | Prevent frozen direct air cooling system of power plant of tube bank |
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| Publication Number | Publication Date |
|---|---|
| CN111397389A true CN111397389A (en) | 2020-07-10 |
| CN111397389B CN111397389B (en) | 2021-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010199013.1A Active CN111397389B (en) | 2020-03-20 | 2020-03-20 | Prevent frozen direct air cooling system of power plant of tube bank |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112461014A (en) * | 2020-11-20 | 2021-03-09 | 中国能源建设集团华东电力试验研究院有限公司 | Air cooling island anti-freezing integrated system based on extreme cold climate condition and operation method thereof |
| CN112833567A (en) * | 2021-01-23 | 2021-05-25 | 西安热工研究院有限公司 | Intelligent adjustable mirror surface system suitable for air cooling island all-condition cooling and freezing prevention |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0369298A1 (en) * | 1988-11-14 | 1990-05-23 | Michael William Larinoff | Freeze protected, air-cooled, vacuum steam condenser |
| JP2807992B2 (en) * | 1996-03-06 | 1998-10-08 | ハドソン・プロダクツ・コーポレイション | Steam condenser |
| CN103994678A (en) * | 2014-06-07 | 2014-08-20 | 华电重工机械有限公司 | Direct air cooling unit capable of preventing tube bundles from being frozen and effectively removing accumulated dust |
| CN204594305U (en) * | 2015-04-01 | 2015-08-26 | 大唐彬长发电有限责任公司 | A kind of Direct Air-Cooled condensing turbine heat-exchanging tube bundle with antifreeze function |
| CN205454122U (en) * | 2016-04-11 | 2016-08-10 | 张超 | Direct air cooling of firepower power plant system start -up is listed as fin heating device |
| CN107241062A (en) * | 2017-08-08 | 2017-10-10 | 上海安乃基能源科技有限公司 | Photovoltaic panel detection means and system |
| CN208155462U (en) * | 2018-06-06 | 2018-11-27 | 西昌飓源风电开发有限公司 | Wind power generation stepped movable type conductor rail thermal detector |
| CN109217779A (en) * | 2018-09-28 | 2019-01-15 | 广东电网有限责任公司 | A kind of cooling tower of wind light mutual complementing energy supply |
-
2020
- 2020-03-20 CN CN202010199013.1A patent/CN111397389B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0369298A1 (en) * | 1988-11-14 | 1990-05-23 | Michael William Larinoff | Freeze protected, air-cooled, vacuum steam condenser |
| JP2807992B2 (en) * | 1996-03-06 | 1998-10-08 | ハドソン・プロダクツ・コーポレイション | Steam condenser |
| CN103994678A (en) * | 2014-06-07 | 2014-08-20 | 华电重工机械有限公司 | Direct air cooling unit capable of preventing tube bundles from being frozen and effectively removing accumulated dust |
| CN204594305U (en) * | 2015-04-01 | 2015-08-26 | 大唐彬长发电有限责任公司 | A kind of Direct Air-Cooled condensing turbine heat-exchanging tube bundle with antifreeze function |
| CN205454122U (en) * | 2016-04-11 | 2016-08-10 | 张超 | Direct air cooling of firepower power plant system start -up is listed as fin heating device |
| CN107241062A (en) * | 2017-08-08 | 2017-10-10 | 上海安乃基能源科技有限公司 | Photovoltaic panel detection means and system |
| CN208155462U (en) * | 2018-06-06 | 2018-11-27 | 西昌飓源风电开发有限公司 | Wind power generation stepped movable type conductor rail thermal detector |
| CN109217779A (en) * | 2018-09-28 | 2019-01-15 | 广东电网有限责任公司 | A kind of cooling tower of wind light mutual complementing energy supply |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112461014A (en) * | 2020-11-20 | 2021-03-09 | 中国能源建设集团华东电力试验研究院有限公司 | Air cooling island anti-freezing integrated system based on extreme cold climate condition and operation method thereof |
| CN112461014B (en) * | 2020-11-20 | 2022-08-23 | 中国能源建设集团华东电力试验研究院有限公司 | Air cooling island anti-freezing integrated system based on extreme cold climate condition and operation method thereof |
| CN112833567A (en) * | 2021-01-23 | 2021-05-25 | 西安热工研究院有限公司 | Intelligent adjustable mirror surface system suitable for air cooling island all-condition cooling and freezing prevention |
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| Publication number | Publication date |
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| CN111397389B (en) | 2021-07-27 |
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