CN202747832U - Direct air-cooling and liquid nitrogen-spraying cooling system - Google Patents
Direct air-cooling and liquid nitrogen-spraying cooling system Download PDFInfo
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- CN202747832U CN202747832U CN 201220477601 CN201220477601U CN202747832U CN 202747832 U CN202747832 U CN 202747832U CN 201220477601 CN201220477601 CN 201220477601 CN 201220477601 U CN201220477601 U CN 201220477601U CN 202747832 U CN202747832 U CN 202747832U
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Abstract
The utility model discloses a direct air-cooling and liquid nitrogen-spraying cooling system. The direct air-cooling and liquid nitrogen-spraying cooling system comprises a liquid nitrogen preparation device, a liquid nitrogen storage tank, a liquid nitrogen main pipe and a liquid nitrogen distribution pipe, wherein the liquid nitrogen outlet of the liquid nitrogen preparation device is in fluid conduction with the liquid nitrogen inlet of the liquid nitrogen storage tank, the liquid nitrogen outlet of the liquid nitrogen storage tank is in fluid conduction with the liquid nitrogen main pipe, the liquid nitrogen main pipe is in fluid conduction with the liquid nitrogen distribution pipe, and liquid nitrogen spray nozzles are mounted on the liquid nitrogen distribution pipe in the positions above all air-cooling fans; and valves are respectively mounted on a pipeline between the liquid nitrogen preparation device and the liquid nitrogen storage tank, the pipeline between the liquid nitrogen storage tank and the liquid nitrogen main pipe and the pipeline between the liquid nitrogen main pipe and the liquid nitrogen distribution pipe. The direct air-cooling and liquid nitrogen-spraying cooling system disclosed by the utility model does not need to use water and can still work normally in low-temperature seasons and effectively solve the problem of output decrease of a direct air cooling unit caused by too high wind temperature and unfavorable wind direction; and in addition, the wind temperature can be reduced to the required temperature by utilizing liquid nitrogen.
Description
Technical field
The utility model relates to a kind of generating set cooling system, particularly a kind of Direct Air-Cooled hydrojet nitrogen cooling system.
Background technology
Direct Air-cooled Unit adopts air directly to cool off turbine discharge, and water-saving result is fairly obvious, therefore, is widely used in the new thermal power generation unit of going into operation in the north in recent years.But, to compare with water chiller, the back pressure that its maximum shortcoming is unit easily is subject to the impact of environment, such as temperature, wind speed, wind direction etc.Result of study shows, the hot air reflux that ambient air temperature rising, unfavorable wind speed, unfavorable wind direction cause all can cause the temperature rise of radiator air inlet crosswind.The heat exchange property of wind-warm syndrome rising meeting appreciable impact air cooling heat radiator worsens the decline of radiator heat transfer effect, heat exchange property.Backpressure rising causes Direct Air-cooled Unit specific steam consumption, heat consumption rate, standard coal consumption rate for generating to increase so that the turbine discharge temperature rises, and cost of electricity-generating increases, and the economy of unit operation reduces.In addition, the vibration reinforcement when backpressure rising also can cause the Turbo-generator Set operation, the swollen mouth of condenser become flexible, the series of problems such as the condensate water qualitative change is poor, axial thrust increase, the unit output of having at last reduce.
When being in summer high temperature, the heat transfer effect of air cooling tubes condenser becomes poorer, if unfavorable wind direction is arranged again, when wind speed occurs, back pressure can rise De Genggao, and this also is have to when the summer high temperature reason of forced partial outage and the easily frequent chaser of unit of North large-scale Air-cooled Unit.Summer high temperature period network load also is in peak period, also is the operation period that Direct Air-cooled Unit is exerted oneself and is obstructed simultaneously.Therefore, the problem of being obstructed of exerting oneself has been subject to the attention of height the Air-cooled Unit summer high temperature period.
At present, be spraying (water smoke) humidification for the Direct Air-cooled Unit limited solution of exerting oneself summer, namely spray in air in the radiator inlet side, the result of numerical simulation and actual motion shows that spraying can significantly reduce radiator air inlet crosswind temperature, effectively solves the wind-warm syndrome unit output the cause problem of being obstructed that raises.But also there are some problems in the spray humidification method:
1. the advantage of Direct Air-cooled Unit maximum is water saving, but the spraying carried out for low the back of pressure, has but greatly increased the water consumption of unit; In order to prevent the spreader surface corrosion, usually adopt demineralized water as cooling medium, therefore, increased again the expense that water processed produces simultaneously;
2. because the freezing problem of water, can't solve that fans entrance wind-warm syndrome that unfavorable wind speed, wind direction cause raises and the unit operation problem that causes at low temperature season;
3. the actual operating position of some power plant shows, the method for mist cooling can only drop to a certain degree, wind-warm syndrome can only be reduced to certain temperature that is:, can not realize the decrease (as wind-warm syndrome can not be reduced to below the zero degrees celsius) of wind-warm syndrome.
The utility model content
For the deficiencies in the prior art, the purpose of this utility model is to provide a kind of Direct Air-Cooled hydrojet nitrogen cooling system that water and low temperature season still can be worked of not needing, and effectively solves the wind-warm syndrome Direct Air-cooled Unit that the causes problem of being obstructed of exerting oneself that raises.
The technical solution of the utility model is achieved in that Direct Air-Cooled hydrojet nitrogen cooling system, comprise liquid nitrogen Preparation equipment, liquid nitrogen storage tank, liquid nitrogen house steward and liquid nitrogen distributing pipe, the liquid nitrogen outlet of described liquid nitrogen Preparation equipment and the liquid nitrogen inlet fluid conducting of described liquid nitrogen storage tank, liquid nitrogen outlet and the described liquid nitrogen house steward fluid communication of described liquid nitrogen storage tank, described liquid nitrogen house steward and described liquid nitrogen distributing pipe fluid communication are equipped with the liquid nitrogen nozzle on the described liquid nitrogen distributing pipe of every air cooling blower fan top layout; On the pipeline between described liquid nitrogen Preparation equipment and the described liquid nitrogen storage tank, be separately installed with valve on the pipeline between described liquid nitrogen storage tank and the described liquid nitrogen house steward and on the pipeline between described liquid nitrogen house steward and the described liquid nitrogen distributing pipe.
Above-mentioned Direct Air-Cooled hydrojet nitrogen cooling system, described liquid nitrogen Preparation equipment is two or more, the liquid nitrogen of each described liquid nitrogen Preparation equipment exports the liquid nitrogen inlet fluid conducting from different described liquid nitrogen storage tanks, by the isocon fluid communication, a described valve is installed also on described isocon between the liquid nitrogen entrance of adjacent two described liquid nitrogen storage tanks.
The beneficial effects of the utility model are: do not need to make water and low temperature season still can work, can effectively solve the wind-warm syndrome Direct Air-cooled Unit the cause problem of being obstructed of exerting oneself that raises; In addition, utilize the temperature that liquid nitrogen can be reduced to wind-warm syndrome to be needed.
Description of drawings
Fig. 1 is the structural representation of the utility model Direct Air-Cooled hydrojet nitrogen cooling system.
Among the figure: 1-liquid nitrogen Preparation equipment, 2-liquid nitrogen storage tank, 3-liquid nitrogen house steward, 4-liquid nitrogen distributing pipe, 5-liquid nitrogen nozzle, 6-air cooling blower fan, 7-valve, 8-isocon, Air-Cooling Island of 9-, No. two Air-Cooling Islands of 10-.
The specific embodiment
As shown in Figure 1, the present embodiment Direct Air-Cooled hydrojet nitrogen cooling system comprises liquid nitrogen Preparation equipment 1, liquid nitrogen storage tank 2, liquid nitrogen house steward 3 and liquid nitrogen distributing pipe 4, the liquid nitrogen outlet of described liquid nitrogen Preparation equipment 1 and the liquid nitrogen inlet fluid conducting of described liquid nitrogen storage tank 2, liquid nitrogen outlet and described liquid nitrogen house steward 3 fluid communication of described liquid nitrogen storage tank 2, described liquid nitrogen house steward 3 and described liquid nitrogen distributing pipe 4 fluid communication are equipped with liquid nitrogen nozzle 5 on the described liquid nitrogen distributing pipe 4 of every air cooling blower fan 6 tops layout; On the pipeline between described liquid nitrogen Preparation equipment 1 and the described liquid nitrogen storage tank 2, be separately installed with valve 7 on the pipeline between described liquid nitrogen storage tank 2 and the described liquid nitrogen house steward 3 and on the pipeline between described liquid nitrogen house steward 3 and the described liquid nitrogen distributing pipe 4.
Described liquid nitrogen Preparation equipment 1 is two, the liquid nitrogen inlet fluid conducting of the described liquid nitrogen storage tank 2 that the liquid nitrogen outlet of each described liquid nitrogen Preparation equipment 1 is different from, by isocon 8 fluid communication, a described valve 7 is installed also on described isocon 8 between the liquid nitrogen entrance of two described liquid nitrogen storage tanks 2.
Liquid nitrogen can directly utilize air to do raw material, adopts the Cryogenic air separation technology to obtain, and the preparation method is simple; Use the liquid nitrogen cooling cooling in direct air cooling system after, the nitrogen of generation can directly enter atmosphere, and namely non-environmental-pollution does not make radiator produce dirt or corrosion yet.Therefore, liquid nitrogen is fit to replace spraying (water) as the cooling down medium of direct air cooling system very much.In addition, the technology that liquid nitrogen is produced, relevant large-scale low-temperature fluid storage and conveying technology are all very ripe, and this is for using liquid nitrogen that technique guarantee is provided in the power plant.
Generating set common two connection in thermal power plant are built, and its Air-Cooling Island is also adjacent building in together usually.Direct air cooling system can form (the concrete layout, namely concrete columns and row are as the criterion with each power plant's actual arrangement) by 8 rows, 8 row, and namely an Air-Cooling Island 9 and No. two Air-Cooling Islands 10 arrange that respectively 64 air cooling blower fans 6 and radiator unit carry out heat exchange.
When summer high temperature, by in a described Air-Cooling Island 9 and described No. two Air-Cooling Islands 10, spraying into liquid nitrogen the wind-warm syndrome that enters radiator is descended, thereby reach the purpose that improves radiator heat exchange, reduction unit back pressure, improves unit economy.
In order to optimize operation, can adopt the following method of operation: namely produce liquid nitrogen and storage, by day high temperature period with station service at Low Night Temperature between low-load period, the cooling of hydrojet nitrogen, because the radiator heat exchange is strengthened, the unit back pressure is descended, the coal consumption of system of unit electricity descends; That is to say and when the coal amount is identical, can send more electricity.This shows, the present embodiment Direct Air-Cooled hydrojet nitrogen cooling system also has the storage peak regulation function.
In order to improve reliability of operation, this example Direct Air-Cooled hydrojet nitrogen cooling system is arranged two large-scale described liquid nitrogen Preparation equipments 1, and the liquid nitrogen preparation can be adopted cryogenic air separation technology or other technology.According to the above-mentioned method of operation, the liquid nitrogen for preparing stores by two or more (the present embodiment is take 2 as example) liquid nitrogen storage tank 2 in order to use at any time when needing.By isocon 8 fluid communication, a described valve 7 is installed also on described isocon 8 between the liquid nitrogen entrance of two described liquid nitrogen storage tanks 2, to improve reliability and the flexibility of unit operation.When the environment temperature rising needs the cooling of hydrojet nitrogen, liquid nitrogen in the liquid nitrogen storage tank 2 enters liquid nitrogen house steward 3 by pipeline, entering respectively is an Air-Cooling Island 9 again, each row liquid nitrogen distributing pipe 4 in No. two Air-Cooling Islands 10, and by liquid nitrogen nozzle 5 liquid nitrogen is sprayed near radiator and the air cooling blower fan 6, reduce the wind-warm syndrome purpose to reach.
Above-described embodiment only is for the invention example clearly is described, and is not the restriction to the invention specific embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give all embodiments exhaustive.And the apparent variation of being amplified out thus or change still are among the protection domain of the invention claim.
Claims (2)
1. Direct Air-Cooled hydrojet nitrogen cooling system, it is characterized in that, comprise liquid nitrogen Preparation equipment (1), liquid nitrogen storage tank (2), liquid nitrogen house steward (3) and liquid nitrogen distributing pipe (4), the liquid nitrogen outlet of described liquid nitrogen Preparation equipment (1) and the liquid nitrogen inlet fluid conducting of described liquid nitrogen storage tank (2), liquid nitrogen outlet and described liquid nitrogen house steward (3) fluid communication of described liquid nitrogen storage tank (2), described liquid nitrogen house steward (3) and described liquid nitrogen distributing pipe (4) fluid communication are equipped with liquid nitrogen nozzle (5) on the described liquid nitrogen distributing pipe (4) that every air cooling blower fan (6) top is arranged; On the pipeline between described liquid nitrogen Preparation equipment (1) and the described liquid nitrogen storage tank (2), be separately installed with valve (7) on the pipeline between described liquid nitrogen storage tank (2) and the described liquid nitrogen house steward (3) and on the pipeline between described liquid nitrogen house steward (3) and the described liquid nitrogen distributing pipe (4).
2. Direct Air-Cooled hydrojet nitrogen cooling system according to claim 1, it is characterized in that, described liquid nitrogen Preparation equipment (1) is two or more, the liquid nitrogen of each described liquid nitrogen Preparation equipment (1) exports the liquid nitrogen inlet fluid conducting from different described liquid nitrogen storage tanks (2), by isocon (8) fluid communication, a described valve (7) is installed also on described isocon (8) between the liquid nitrogen entrance of adjacent two described liquid nitrogen storage tanks (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220477601 CN202747832U (en) | 2012-09-19 | 2012-09-19 | Direct air-cooling and liquid nitrogen-spraying cooling system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220477601 CN202747832U (en) | 2012-09-19 | 2012-09-19 | Direct air-cooling and liquid nitrogen-spraying cooling system |
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| CN202747832U true CN202747832U (en) | 2013-02-20 |
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| CN 201220477601 Expired - Fee Related CN202747832U (en) | 2012-09-19 | 2012-09-19 | Direct air-cooling and liquid nitrogen-spraying cooling system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104274324A (en) * | 2013-07-11 | 2015-01-14 | 天士力制药集团股份有限公司 | Dropping pill air cooling production line |
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2012
- 2012-09-19 CN CN 201220477601 patent/CN202747832U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104274324A (en) * | 2013-07-11 | 2015-01-14 | 天士力制药集团股份有限公司 | Dropping pill air cooling production line |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130220 Termination date: 20160919 |