CN207113650U - A kind of indirect air cooling system freezing protection control device - Google Patents
A kind of indirect air cooling system freezing protection control device Download PDFInfo
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- CN207113650U CN207113650U CN201721184485.XU CN201721184485U CN207113650U CN 207113650 U CN207113650 U CN 207113650U CN 201721184485 U CN201721184485 U CN 201721184485U CN 207113650 U CN207113650 U CN 207113650U
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- cooling
- water temperature
- shutter
- air cooling
- leaving water
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Abstract
It the utility model is related to a kind of indirect air cooling system freezing protection control device, it is characterized in that, it is characterized in that, indirect air cooling system includes air cooling heat radiator (1), cooling column body (4), shutter (2) and driver (5), air cooling heat radiator (1) is divided into multiple cooling sectors, each cooling sector includes multiple cooling triangles (1 1), driver (5) and shutter (2) composition shutter motor unit, set up optical fiber grating temperature detection means（3）, optical fiber grating temperature detection means（3）Optical cable is detected by leaving water temperature（3‑1）, grating sensor（3‑2）And main frame（3‑3）Composition, grating sensor（3‑2）It is arranged on leaving water temperature detection optical cable（3‑1）On, leaving water temperature detection optical cable（3‑1）It is arranged in cooling triangle（1‑1）Surface.Existing cooling sector water temperature control is changed to shutter motor unit by the utility model（One or two cooling triangle 11）Water temperature control, improve the leaving water temperature uniformity of whole air cooling system, the operation back pressure of turbine condenser reduced in the case where meeting preventing freeze in winter requirement condition.
Description
Technical field
A kind of indirect air cooling system freezing protection control device of the utility model, it is indirectly empty to be mainly used in thermal power plant, chemical enterprise
The control of cooling system.
Background technology
In thermal power generation or chemical enterprise, in steam turbine（Or turbine）Inside did the steam after work(（Also known as exhaust steam）, need
It is discharged into condenser and condenses into water, again returns to boiler recycling.The heat of condenser is taken away by recirculated water, makes circulation
Water produces heat exchange, the system that finally heat is discharged into the atmosphere in air cooling heat radiator with cold air（Device）, between being referred to as
Connect air cooling system.Indirect air cooling system is applied very universal in China, mainly by air cooling heat radiator, cooling column body, shutter
And driver composition.Indirect air cooling system scale required for the steam turbine of different displacements is different, the air cooling radiating configured
Device quantity and cooling column body appearance and size are also different.Generally, air cooling heat radiator is arranged vertically on cooling column body bottom one week, is divided
Into multiple cooling sectors（Group）, often cool down sector（Group）Multiple cooling triangles are included again（Heat-sink unit）, each cooling triangle
Air inlet is configured with shutter；The aperture of shutter is adjusted by driver driving, is realized by shutter to through supercooling
The regulation of triangle air mass flow.The cooling triangle of each cooling sector shares a set of recirculated water water inlet pipe and water outlet pipe；Driver driving one
Individual or two cooling triangles shutter, driver and the shutter shape driven act single into shutter one by one in control
Member.
During summer, shutter is in a fully open position, air cooling heat radiator obtains maximum heat exchange with little need for regulation
Ability, make steam-turbine back pressure as low as possible.But when environment temperature is low in the winter time, air cooling heat radiator exists frozen
For risk, it is necessary to reduce shutter aperture, reduction avoids circulating water temperature too low by the air mass flow of air cooling heat radiator.It is existing
The antifreeze control method of technology is the mounting temperature sensor on the water inlet pipe and water outlet pipe of each cooling sector, to detect whole cooling fan
The temperature of area's recirculated water（Mean temperature）, when leaving water temperature is less than certain setting, all shutters in cooling sector are driving
Under device driving, while reduce aperture.
Existing antifreeze control method Shortcomings：One cooling sector has multiple（Much larger than two）Triangle is cooled down, altogether
With a set of inlet and outlet pipe lines, the circulating water temperature measured in common conduit is the circulation of the whole all cooling triangles in cooling sector
Horizontal equal leaving water temperature, all cooling triangle shutters are controlled according only to this leaving water temperature value, and make all shutters
Aperture it is identical；But influenceed by factors such as ambient wind, water distribution uniformities, the whole water temperature phase for cooling down each cooling triangle in sector
Difference is too big；To avoid air cooling heat radiator freezing accident, it has to improve the leaving water temperature of cooling sector, ultimately result in the steam turbine back of the body
Pressure rise and the coal-fired consumption increase of generating set.
The content of the invention
The purpose of this utility model be to provide one kind make cooling sector recirculated water leaving water temperature uniformity is good, temperature is low, hair
The high indirect air cooling system freezing protection control device of electrical efficiency.
The technical scheme in the invention for solving the above technical problem is：A kind of antifreeze control dress of indirect air cooling system
Put, indirect air cooling system includes air cooling heat radiator, cooling column body, shutter and driver, and air cooling heat radiator is divided into multiple cold
But sector, each sector that cools down include multiple cooling triangles, driver and shutter composition shutter motor unit, set up optical fiber
Grating temperature detection means, optical fiber grating temperature detection means detect optical cable, grating sensor and main frame by leaving water temperature and formed,
Grating sensor is arranged on leaving water temperature detection optical cable, and leaving water temperature detection optical cable is arranged in cooling triangular surface.
Described leaving water temperature detection optical cable is serpentine-like to be arranged in entering for cooling triangle corresponding with blind drive unit
Wind side.
Described shutter motor unit includes a set of driver and a shutter for cooling down triangle or two coolings three
The shutter at angle.
It comprises the following steps：
Step 1, by grating sensor gather it is each cooling triangle leaving water temperature detected value；
Step 2, the leaving water temperature value for calculating each shutter motor unit；
Step 3, compare shutter motor unit leaving water temperature value and minimum leaving water temperature setting, if leaving water temperature value
Less than or equal to minimum leaving water temperature setting, step 4 is performed, otherwise, performs step 5；
Step 4, start the shutter motor unit anti-frost protection program, i.e. shutter aperture corresponding to reduction, return to step
Rapid 1；
Step 5, stop shutter motor unit anti-frost protection program；
Step 6, the actual back pressure of condenser compared with target back pressure, held when actual back pressure value is more than target back pressure value
Row step 7, step 8 is performed during less than target back pressure value；
Step 7, leaving water temperature value highest blinds is selected in the shutter motor unit for be not carried out anti-frost protection program
Window motor unit increase the operation of shutter aperture, return to step 1；
Step 8, in the shutter motor unit for being not carried out anti-frost protection program and the non-contract fully of shutter, select water outlet
The minimum shutter motor unit of temperature value reduce the operation of shutter aperture, return to step 1.
Described leaving water temperature value is that own on the cooling triangular surface detection optical cable corresponding to the shutter motor unit
The weighted average or arithmetic mean of instantaneous value of multiple grating sensor detected values.
Compared with prior art, the utility model has the advantage of：
Existing cooling sector water temperature control is changed to shutter motor unit by the utility model（One or two cooling three
Angle）Water temperature control, improve the leaving water temperature uniformity of whole air cooling system, reduced in the case where meeting preventing freeze in winter requirement condition
The operation back pressure of turbine condenser.Make that cooling sector recirculated water leaving water temperature uniformity is good, temperature is low, generating efficiency is high.
Brief description of the drawings
Fig. 1 is that prior art indirect air cooling system forms schematic diagram.
Fig. 2 is that fiber-optic grating detection device of the present utility model forms and leaving water temperature detects optical cable layout drawing.
Fig. 3 antifreeze control flow charts of the present utility model.
In figure：Air cooling heat radiator 1, cooling triangle 1-1, shutter 2, optical fiber grating temperature detection means 3, leaving water temperature inspection
Light-metering cable 3-1, grating sensor 3-2, main frame 3-3, cooling column body 4, driver 5.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing embodiment.
Embodiment 1：
Fig. 1 is the composition schematic diagram of prior art indirect air cooling system.Indirect air cooling system is by air cooling heat radiator 1, blinds
Window 2, cooling column body 4 and driver 5 form.Air cooling heat radiator 1 is arranged vertically on the lower circumference of cooling tower 4, by many coolings
The air cooling heat radiator 1 of triangle composition is divided into multiple cooling sectors, and each sector that cools down includes multiple cooling triangles；In cooling three
Angle（Air cooling heat radiator）Air inlet arranges shutter 2, and shutter 2 is driven by driver 5 to realize opening and closing function.Blinds
The effect of window 2 is air mass flow of the regulation by air cooling heat radiator 1, is realized in the winter time antifreeze and maintenance steam turbine target back pressure
Purpose.
Fig. 2 is fiber-optic grating detection device composition and leaving water temperature detection optical cable layout drawing of the present utility model.As schemed
Show, fiber-optic grating detection device 3 detects optical cable 3-1, grating sensor 3-2 and main frame 3-3 by leaving water temperature and formed.The institute in figure
The two cooling triangle 1-1 shown air intake side external surface, leaving water temperature detection optical cable 3-1 is arranged, in leaving water temperature detection light
Multiple grating sensor 3-2 are set on cable 3-1.Grating sensor 3-2 contacts with cooling down triangle 1-1 radiating fin, passes through inspection
Surveying radiating fin temperature approximate can obtain cooling down the temperature of recirculated water in triangle 1-1 heat-transfer pipes.Leaving water temperature detection optical cable 3-1
Arrange it is serpentine-like, shared in figure two cooling triangle 1-1, the cable of leaving water temperature detection light shown in Fig. 2 3-1 arrangement is the present embodiment
A set of blind drive unit arrangement, that is to say, that in the two cooling shutters 2 of triangle 1-1 air inlets and a set of
Driver 5（Not shown in Fig. 2）A blind drive unit is formed, and by its realization to by the two cooling triangles 1-1
The regulation of air mass flow.In practical engineering application, a cooling sector includes multiple this blind drive units.
Fig. 3 is antifreeze control method flow chart of the present utility model, and Fig. 3 and Fig. 2 are combined, and description rate-determining steps are such as
Under：
Temperature detection value on each cooling triangle 1-1 that step 1, collection grating sensor 3-2 are sensed.Due to each
Multiple grating sensor 3-2 are provided with cooling triangle 1-1, so the temperature detection value that the same time is obtained is multiple.This
A little detected values are actually the cooling triangle 1-1 fin surface temperature of grating sensor 3-2 detections, because of fin temperature and heat-transfer pipe
The difference of interior circulating water temperature is smaller, and the difference can be neglected in actual applications, certainly, also can be by modification method fin temperature
Degree is converted into circulating water temperature.
Step 2, the leaving water temperature value for calculating each shutter motor unit.Each shutter motor unit,
By one or two cooling triangle 1-1 entrances shutter 2 and a set of driver 5 form, respectively correspond to control one or
Two cooling triangle 1-1 air mass flow.The leaving water temperature value of each shutter motor unit, is to use weighted mean method or calculation
The average value that corresponding cooling triangle 1-1 of the art method of average to being gathered in step 1 all temperature detection values obtain after calculating.
Step 3, the leaving water temperature value for comparing shutter motor unit and minimum leaving water temperature setting, if shutter moves
The leaving water temperature value for making unit is less than or equal to minimum leaving water temperature setting, performs step 4, otherwise, performs step 5.
Step 4, start the shutter motor unit anti-frost protection program, that is, reduce shutter aperture, return to step 1；Subtract
The amplitude of small shutter aperture can be set according to field condition.
Step 5, stop shutter motor unit anti-frost protection program；
Step 6, compare the actual back pressure of condenser and target back pressure, step is performed when actual back pressure value is more than target back pressure value
Rapid 7, step 8 is performed during less than target back pressure value；
Step 7, leaving water temperature value highest blinds is selected in the shutter motor unit for be not carried out anti-frost protection program
Window motor unit increase the operation of shutter aperture, return to step 1；
Step 8, in shutter motor unit that be not carried out anti-frost protection program and the non-contract fully of shutter, select
The minimum shutter motor unit of water temperature angle value reduce the operation of shutter aperture, return to step 1.
In addition to the implementation, the utility model also includes other embodiment, all to use equivalents or equivalent
The technical scheme that substitute mode is formed, all should fall within the protection domain of the utility model claims.
Claims (3)
- A kind of 1. indirect air cooling system freezing protection control device, it is characterised in that indirect air cooling system include air cooling heat radiator (1), Cooling column body (4), shutter (2) and driver (5), air cooling heat radiator (1) are divided into multiple cooling sectors, each cool down sector Comprising multiple cooling triangles (1-1), driver (5) and shutter (2) composition shutter motor unit, optical fiber grating temperature is set up Detection means（3）, optical fiber grating temperature detection means（3）Optical cable is detected by leaving water temperature（3-1）, grating sensor（3-2）With Main frame（3-3）Composition, grating sensor（3-2）It is arranged on leaving water temperature detection optical cable（3-1）On, leaving water temperature detection optical cable （3-1）It is arranged in cooling triangle（1-1）Surface.
- A kind of 2. indirect air cooling system freezing protection control device according to claim 1, it is characterised in that：Described goes out water temperature Degree detection optical cable（3-1）Serpentine-like be arranged in corresponding with blind drive unit cools down triangle（1-1）Inlet side.
- A kind of 3. indirect air cooling system freezing protection control device according to claim 1 or 2, it is characterised in that：Described hundred Leaf window motor unit includes a set of driver（5）With a cooling triangle（1-1）Shutter（2）Or two cooling triangles（1- 1）Shutter（2）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721184485.XU CN207113650U (en) | 2017-09-15 | 2017-09-15 | A kind of indirect air cooling system freezing protection control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721184485.XU CN207113650U (en) | 2017-09-15 | 2017-09-15 | A kind of indirect air cooling system freezing protection control device |
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| Publication Number | Publication Date |
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| CN207113650U true CN207113650U (en) | 2018-03-16 |
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| CN201721184485.XU Active CN207113650U (en) | 2017-09-15 | 2017-09-15 | A kind of indirect air cooling system freezing protection control device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108871007A (en) * | 2018-08-03 | 2018-11-23 | 华电电力科学研究院有限公司 | A kind of large size cooling stack automatic adjustment denoising device and its noise-reduction method |
| CN114739200A (en) * | 2022-04-18 | 2022-07-12 | 中国能源建设集团华中电力试验研究院有限公司 | Sector anti-freezing control method and system and surface type intercooling system sector |
-
2017
- 2017-09-15 CN CN201721184485.XU patent/CN207113650U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108871007A (en) * | 2018-08-03 | 2018-11-23 | 华电电力科学研究院有限公司 | A kind of large size cooling stack automatic adjustment denoising device and its noise-reduction method |
| CN114739200A (en) * | 2022-04-18 | 2022-07-12 | 中国能源建设集团华中电力试验研究院有限公司 | Sector anti-freezing control method and system and surface type intercooling system sector |
| CN114739200B (en) * | 2022-04-18 | 2024-03-26 | 中国能源建设集团华中电力试验研究院有限公司 | Sector anti-freezing control method and system and surface type indirect cooling system sector |
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