CN107976088A

CN107976088A - A kind of closed cycle cooling process and device

Info

Publication number: CN107976088A
Application number: CN201610920844.7A
Authority: CN
Inventors: 李宁
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-10-24
Filing date: 2016-10-24
Publication date: 2018-05-01

Abstract

A kind of closed cycle cooling process and device, according to it is existing it is air-cooled in water-deficient area since vegetation is rare, winter severe cold, summer high temperature, strong wind, the collective effect that dirt wadding four endangers greatly, cannot well it run, cause the chemical industry of northern China water-deficient area, it is metallurgical, the open type cooling that the also widely used water consumption of the circulating water of the industries such as electric power is beaten, the present invention utilizes water-deficient area air feature, using adverse current, following current and the mode of turbulent flow gasification spray water drop, design a kind of colloid that can be eliminated in air, dust, the pollution to recirculated water such as dissolved salt, than the closed cycle cooling process and device that existing open circulation cooling process reduces water resources consumption more than 75%, the air-cooled technique is applied to exhaust steam in steam turbine indirect air cooling with device, the heat consumption of indirect air cooling can further be reduced, increase generated energy.

Description

A kind of closed cycle cooling process and device

Technical field

The invention belongs to industrial circulating water field, more particularly to water-deficient area chemical industry, clammy power generation recirculated water cooling Technology and device.

Background technology

With the process of industrialization of human society, global water resources consume increasing, the limited water resource in various regions also day Benefit is in short supply, especially the northern area of China's richness coal water shortage, and the life of coal chemical industry and power electric is carried out using abundant coal resources Production, is both needed to consume substantial amounts of recirculated water, and by what cannot be recycled under the conditions of current art, process waste is sent into cooling tower It is interior, by the open type directly contacted the evaporation cooling row with air to air, cause the water resources consumption of flood tide, this becomes lacks The weight and key restriction factors that can not bear of water regional economic development.

Water-deficient area is in order to save water resource, to waiting processing medium extensive including circulating water in turbine condenser Using force ventilation is air-cooled, gravity-flow ventilation is air-cooled, force ventilation is air-cooled with the mixed ventilation that gravity-flow ventilation is combined, or water spray is cold But the dry and wet mixing being combined is air-cooled or the dry and wet joint of the air-cooled rear evaporative air-cooling of elder generation is air-cooled etc., to reduce water resources consumption.

But since China water-deficient area vegetation is rare, atmospheric vapour content is low, and not only the winter and summer temperature difference is big, day and night temperature Amplitude of variation and speed bigger, the simple air-cooled generalized ability of section at high temperature deficiency, and existing dry and wet combines air-cooled, base In the mentality of designing of the gasification latent heat great advantages utilized, the wing for allowing the spray water sprayed into cooling air largely to be restrained in heat release On piece gasifies, and the product of this mentality of designing can obtain the good result got instant result.

But after a period of time of putting into operation, due to how much being entrained with micronic dust, willow catkins flying in the air, colloid and dissolved salt in air, swept along by droplet And part is deposited between import and the fin of heat release tube bank, its excellent cooling effect, that is, decline, one of solution It is to remove deposit, but is difficult to remove, second, increase water spray, with the increase of running time, deposit is in high humidity and relatively It is increasingly hard to be more difficult to remove in the environment of high temperature, three be that antisludging agent is added in shower water, and gradually increase water spray, solve Certainly the four of method are to cancel fin, water are sprayed directly on on light pipe, this is presently the most extensive evaporative air-cooling, its heat is with regard to complete It is complete taken away by the evaporation of water, final comprehensive benefit with water cooling compared with effect might as well not how much.

Another method be do, it is clammy be but strictly separated, it is first pure do not spray water it is dry it is air-cooled after it is clammy again, due to China The day and night temperature in the north changes greatly, the stream depressurized along with natural wind in the front that air cooling tower produces supercharging, both sides and rear ramp Bulk effect, not only brings local Non-Uniform Flow, more makes the atmospheric pressure difference of the air flow field around large-scale air cooling tower Up to tens of or even hundred more than Pa, make that the inlet air around Air-Cooling Island is seriously uneven, and cooling effect is had a greatly reduced quality, it is clammy in spite of evaporating Compensation, water consume, the energy consumption that its air-cooled water-saving benefit is increased again are swallowed up, so the coal consumption of air-cooled power generation is generally than water cooling It is high by 5~10%.Since the technical cooling of chemical industry, metallurgy etc. requires circulating water temperature to drop to≤30 DEG C by 40 DEG C, than power plant vapour The requirement of turbine cooler recirculated water is more stringent, and the returns of investment of existing dry and wet joint cooling are had an optimistic view of than not by people, so In north of China, chemical industry, metallurgy, the recirculated water of power industry are almost still all reliable using cooling effect, but a large amount of water consumptions Open type cold water cooling, the result is that surface water is almost used up, and largely uses underground water, under having caused level of ground water drastically Drop.

Northern China is located in the westerlies of the Northern Hemisphere, and blow-time is more throughout the year, and wind speed is big, and vegetation is rare, and air is husky Dirt, willow catkins flying in the air content are high, and winter severe cold, summer day is xeothermic, and day and night temperature is huge, cause it is existing it is various it is air-cooled cannot be at this Under kind environment more preferable circulating water public work is provided for industrial production.

The content of the invention

The purpose of the present invention, exactly develops a kind of new sky that high temperature, severe cold, strong wind, dirt wadding four can be overcome to endanger greatly Cold technique and device, the air-cooled technique are applied to the recirculated water cooling of the industries such as the chemical industry, metallurgy, electric power of northern China water-deficient area But, the pollution to recirculated water such as colloid in air, dust, dissolved salt can be eliminated, water is reduced than existing recycled water cooling process Resource consumption more than 75%；The air-cooled technique is applied to exhaust steam in steam turbine Direct Air-Cooled or indirect air cooling with device, can make steamer Machine, which is contributed, reaches the low energy consumption level of wet type cooling unit.

A kind of closed cycle cooling process and device, by dry and cold heat release tube bank, axial flow blower and fixed frame, air duct, Spraying device and evaporative air-cooling composition, it is characterised in that：

In dry and cold heat release tube bank (6) inlet side installation basket strainer (1) of air duct (7) lower periphery, and use and carry displacement The cleaning vacuum plant of function carries out basket strainer (1) continuous circulation dust suction, to reduce the air drag of basket strainer (1)；Dry Axial flow blower and fixed frame (5) are installed between cold heat release tube bank (6) and basket strainer (1)；Again in axial flow blower and fixed frame (5) between basket strainer (1) installation to the spraying device (3) of cooling air cooling, basket strainer (1) and spraying device (3) it Between adverse current gasification zone (2) are set, the setting following current gasification zone between spraying device (3) and axial flow blower and fixed frame (5) (4)；Due to 15 DEG C~35 DEG C periods of north of China summer, relative air humidity majority is 35% or even less than 25%, spraying dress Put (3) to spray into desalted water through in the low humidity air of basket strainer (1) with droplet, after desalted water droplet absorbs the heat of air Gasification, while the humidity of air is increased to≤95%, air themperature declines rapidly；

Spraying device (3) sprays into desalted water through in the low humidity air of basket strainer (1) with droplet, and desalted water droplet is inhaled Gasify after receiving the heat of air, while the humidity of air is increased to≤95%, air themperature declines rapidly；Concrete operations When desalted water spray amount controlled according to local, air at that time initial humidity, when air humidity reaches 95%, under air themperature The number of degrees of drop are up to 5~15 DEG C, the air after cooling, while being pressurized through axial-flow fan blade (5-1), make the droplet of remnants Completely gasified in the axial-flow fan blade turbulent air that rotation produces at a high speed, so both air themperature is further dropped It is low, the heat transfer logarithmic mean temperature difference (LMTD) between the air after cooling and dry and cold heat release tube bank (6) is significantly increased, is conducive to air suction Dry and cold heat release tube bank (6) liberated heat is received, while prevents droplet air-cooled in fin surface gasification relict sediment, reduction again Effect.

Spraying device (3) is determined by four groups of sprinkler compositions, the quantity of every group of nozzle by circulating water load；First group, Second group, the 3rd group, the 4th group of spray amount ratio be 1: 2: 4: 8, after combined, the different groups of same pressure of supply water lower switch and Valve, you can it is 1 to 15 times of impartial increment to form total amount of spray, and droplet is uniform, not only energy saving, but also can prevent spraying not Foot, reduces circulating water effect, moreover it is possible to prevents excessive spraying, prevents droplet from being gasified totally on time, is swept along by air to dry The drawbacks of cold heat release tube bank (6) gasification, achieve the purpose that accurately to control spray amount according to ambient air temperature, humidity, spraying is equal Switch combination mode Deng increment specifically refers to following table：

When the temperature rises, axial flow blower standard-sized sheet, when circulating water temperature cannot drop to technological requirement value, according to cooling air need Cool down the number of degrees, reduces by 1 DEG C with every kg air, the radix of atomized water spray, selection spraying multiple sprays into.

Using 1.2 meters of diameter and following small diameter shaft flow fan, axial flow blower wheel hub and degree of protection IP55 motor direct-connecteds, Run with rotating speed, motor bearings butter lubrication, power of motor is small, and the purpose so designed not only saves gear reducer, heavy-duty machinery Lubricating oil, frequency converter investment and operating cost, energy consumption, more important is minor diameter fan blade size is small, the turbulent flow rotation of generation Whirlpool diameter is small, turbulence pulsation frequency is high, is particularly conducive to the heat exchange of air and mist droplet, can reliably ensure in air The gasification of droplet, reliably prevents droplet in fin surface gasification relict sediment, reduction air cooling effect；Due also to existingization Work, metallurgy, the quantity of circulating water of power generation are usual all more than tens thousand of tons of magnitudes per hour, and air cooling tower diameter reaches tens of rice even 160 Remaining rice, height is more more than 100 meters, is arranged in the dry and cold heat release tube bundle unit front face area of air duct (7) lower circumference up to thousands of Differed to tens thousand of square metres, so big cylindrical windward side, actual motion proves, it is difficult uniformly, now that its intake velocity, which is, Capable method is exactly to reduce the intake in the region more than inlet air by shutter, this results in considerable heat exchange area, because Cooling air delivery deficiency, and cooling effect declines, and to make up this deficiency, and takes increase air duct highly to solve, especially It is the high area of wind frequency, not only increases investment but also increase security risk, can also bring winter draft is superfluous to trigger sharp freezing again The risk of accident.

The present invention is installed on up on thousands of front face areas to tens thousand of square metres using small axial flow blower, and either which kind of is former The arbitrary region inlet air caused by is uneven, can be compensated by by the axial flow blower of its corresponding region of DCS automatic start-stops；Inlet air More regions, can stop some axial flow blowers, and the present invention is provided with roller shutter air door (5-5), the axis to stop in axial flow blower import Flow fan can link close air door, the wind without causing normal operation wind turbine, by the wind turbine to stop backflow out of come the problem of； The few region of inlet air can then open more or standard-sized sheet axial flow blower, makes up its inlet air deficiency；Axis is not only made using small diameter shaft flow fan For axial flow fan blade when non-horizontal mounting is run, blade moment variations in gravitational field are small, damage not easy to fatigue；Axial flow blower work( Rate is small, and compensating electric capacity is small, and starting current impact is small, completely can by the direct start and stop of DCS remote field relays, without Axial flow blower start stop switch is installed on switchgear house, its investment had not only been reduced but also had been easy to the orderly start and stop of cluster；When winter temperature is low, only Can meet cooling required with the exhausting ability of air duct, axial flow blower as needed both can full cut-off, also can be as needed to any Region axial flow blower is started, and compensates its deficiency in draught.

It is dynamotor by the design of electrical motor of part axial flow blower, lower temperature period in the winter time, using air duct (7) Superfluous exhausting energy, be changed into electric energy feedback on axial flow blower into electric power system；Carry out wind in blowing summer, face period The wind turbine in direction, the pressure difference before and after fan blade is effectively reduced due to wind-force, thus can effectively reduce motor load, makes motor In economize on electricity even generator operation, done harm to and be converted into profit.

The fixed frame (5) of axial flow blower is designed as to have 90 ° of spinfunctions, to be not required to axial flow blower air-supply, During also without reducing cooling air delivery, axial flow blower and its fixed frame are rotated by 90 °, to reduce cooling air flowing resistance Power, increase cooling air enter the flow of dry and cold heat release tube bundle unit, improve air cooling effect.

Using the set-up mode of axial flow blower of the present invention, summer air duct draft deficiency 1. can be not only made up, increases the summer Season air cooling effect, reduce increase air duct height investment and security risk；2. axis stream can also be utilized when using desalination water spray The air turbulence that the high speed rotation of fan blade produces accelerates the gasification of droplet, eliminates soluble solids micro in desalted water in fin Upper deposition, reduces the harm of heat transfer property；3. inlet air that again can uniformly on the huge windward side of air cooling tower, eliminate ambient wind etc. because The harm of inlet air inequality caused by element, even with wind-power electricity generation, and greatly improves the air cooling effect of blowing period；4. winter is low Warm period, air duct draft surplus easily lead to heat release and restrain freezing accident, block cooling air stream movable property using fan blade Raw rotary thrust, electric energy is converted to by motor, has not only been reduced heat release and has been restrained freezing risk but also recycled energy.

Heat release tube bank in dry and cold heat release tube bank (6) of the present invention uses inverted U-shaped structure, its top is led equipped with intersection Flow tube (9) and (10) are so that the recirculated water of flowing by intersecting diversion pipe into the different zones of windward side, both may be used up and down in pipe Reduce dry and cold heat release tube bank (6) isoplanar temperature difference, but can winter it is effectively antifreeze.

Dry and cold heat release tube bank (6) is combined with the triangular arrangement structure of wind turbine and fixed frame (5), such as the institute of attached drawing 5~8 Show；Base tube 1.2~1.6mm of wall thickness, its outer rolling aluminum fin-stock, fin ratio 15~25；It is or flat finned tube, elliptical finned tube, whole The heat release of body fin poling is restrained, and heat release is restrained as shown in attached drawing 3~4, is arranged in air duct lower circumference mode.

Although the present invention is provided with basket strainer in inlet side, the small floating dust in cooling air still can largely enter heat outting pipe Beam, is deposited on fin surface, reduces its heat-sinking capability, and the present invention takes provides compressed air by oilless (oil free) compressor, is put to dry and cold Fin in heat pipe bundle unit carries out continuous purging dedusting once a day, to keep fin to do successively by DCS stored program controlleds Net good heat radiating ability.The thing that filters out on basket strainer uses Mobile vacuum vacuum cleaner, and dust suction is circulated daily along annular basket strainer Once, the debris on basket strainer had both been removed, has also reduced the air drag of strainer.

Air-atomizing temperature-fall period describes：

Cooling air first removes the debris such as the plant fiber carried secretly in air through strainer (low voltage electrostatic basket strainer), to eliminate It is restrained heat release deposition and blocks and lower heat-transfer effect.

Second step, by room temperature desalted water, to be evaporated in vaporific penetrating cooling air, using the evaporation latent heat of water is big, air The characteristics of specific heat capacity is low, makes relative air humidity rise to 80~90%, and the temperature of cooling air is reduced by less than 30% 10 DEG C or so, will 25 DEG C~35 DEG C temperature of summer dry-bulb temperature be reduced to 15 DEG C~25 DEG C, specific method is, is filled first with spraying Put desalted water as shown in Figure 17, to basket strainer direction, i.e., against cooling air flowing direction spraying, to strengthen droplet inverse Flow gasification area (2) and the convection current heat transfer evaporation rate of air, make 6 DEG C~9 degrees Celsius of air cooling-down, followed by contain a small amount of droplet Air whose air-flow enters following current gasification zone (4) again, make unvaporized droplet continue to gasify, also have a small amount of droplet swept along by air Into the rotation boosting at a high speed of axis stream or mixed flow axial-flow fan blade (5-1), remaining micro droplet in air is set to be rotated in high speed Further rapid heat absorption, gasification, makes air themperature reduce by 1 DEG C~3 DEG C again, reaches total cooling in the high intensity turbulent that blade is brought 5~15 DEG C of design requirements.

3rd step, goes out 25 DEG C of dry air of relative humidity ＜ 90% after axial flow blower, into dry and cold tower, absorbs heat release tube bank What is distributed accounts for the heat of the total heat release of recirculated water >=60%, the temperature of recirculated water is dropped to 30 DEG C~34 DEG C by 40 DEG C, cooling air temperature Degree enters air duct after being increased to 30 DEG C~35 DEG C by 15~25 DEG C, utilizes the liter produced after air themperature high-density relative reduction Power, among being discharged into upper atmosphere from air duct top, while also reduces axial flow blower energy consumption.

4th step, goes out the recirculated water of the first heat release tube bundle unit into the air-cooled process unit of water-spraying evaporation is used, utilizes steaming Feel cold the characteristics of but providing close to locality wet-bulb temperature (being usually less than 25 DEG C in north of China) and high heat transfer coefficient, both reduced Circulating water cooling device is invested, but by circulating water temperature be cool below more than 5 DEG C of atmospheric temperature technic index required value (≤ 30 DEG C) in, since north of China latitude is high, height above sea level, the whole year of temperature >=25 DEG C adds up the usual ＜ 1000h of hourage, accounts for Less than the 11.5% of annual period, this is the period of annual water consumption maximum, but since circulating water does not have direct evaporation process, Therefore without the 10% blowdown loss of the evaporation, blowdown, windage loss of open cycle cooling, only desalted water, its amount is than the former Reduce more than 50%.

Present invention process and device further describe：

25 DEG C~35 DEG C high temperature periods of summer temperature, even if axial flow blower standard-sized sheet, due to the logarithm in dry and cold heat release tube bank Mean temperature difference significantly reduces, and air temperature rise is low, and air duct draft also declines to a great extent, and is that can not meet circulating water temperature by 40 DEG C at all 30 DEG C of technological requirement is dropped to, the spray amount of spraying device is so that it is upper limit spray drop that cooling air relative humidity, which reaches 90%, Temperature, can usually reduce by 5~15 DEG C of air themperature, be substantially increased the logarithmic mean temperature difference (LMTD) on dry and cold heat release tube bank (6), can make More than 60% cooling load is arranged to air by dry and cold heat release tube bundle unit, is left less than 40% heat, attached by running Evaporative air-cooling unit shown in Figure 16 ensures that circulating water temperature drops to technological requirement temperature (≤30 DEG C), so using the present invention The air-cooled technique, due to the temperature-lowering load of only maximum 40%, the plant investment of evaporative air-cooling unit, energy consumption are and pure Dry, the wet switching type of cooling compare, 60% can be declined in theory.

Specific to project is implemented, such as the clammy generating set in Taiyuan, Yinchuan Area, it is not required to carry out any change to steam turbine Make, it is only necessary to increase the relevant apparatus of dry and cold tower in cooling tower, also can guarantee that the steam turbine back of the body of 25 DEG C~35 DEG C high temperature periods of summer Force down the technic index regulation in 10kPa.So as to not only save the water resource of preciousness, but also steam turbine reformation expense is saved, also It ensure that and reach clammy generating set heat efficiency.

15 DEG C~25 DEG C medium temperature periods of summer, evaporative air-cooling unit are stopped, the axial flow blower standard-sized sheet of dry and cold tower, according to Temperature height, ensures that circulating water temperature drops to technological requirement temperature by varying the spraying water for spraying into dry and cold heat release tube bank (6) Spend (≤30 DEG C), cooling air first removes the debris such as the fiber carried secretly in air, chip, willow catkins flying in the air through strainer, to eliminate it to putting Heat pipe bundle deposition blocks and lowers heat-transfer effect；According to temperature, a small amount of room temperature desalted water is steamed with vaporific spray into cooling air Hair, makes relative air humidity rise to 80~90% by ＜ 40%, utilizes the spy that the evaporation latent heat of water is big, air specific heat capacity is low Point, after the temperature of cooling air is reduced, air warp beam stream or the rotation boosting at a high speed of mixed flow axial-flow fan blade again, makes in air Remaining micro droplet absorbs heat rapidly in the high intensity turbulent that high speed rotational blade is brought, gasifies, and makes air themperature further 15 DEG C are reduced to, the water spray of 15 DEG C~25 DEG C medium temperature periods of summer, leads to according to the atmospheric pressure of there and then, temperature, humidity DCS control timely adjustments are crossed, the cooling air temperature after mist cooling is reached in fixed 15 DEG C of values of temperature, to be work Industry device provides stable cooling condition, and makes full use of 16~18 DEG C of the relative low temperature in the medium temperature period, effectively reduces water Resource consumption；After going out axial flow blower, 15 DEG C of dry air of relative humidity ＜ 90%, restrain (6) into dry and cold heat release, absorb heat release Restrain distribute account for the heat of the total heat release of recirculated water >=100%, the temperature of recirculated water is dropped to≤30 DEG C by 40 DEG C；Cooling air is inhaled Enter air duct (7) after temperature is increased to 30 DEG C by 15 DEG C after heat, utilize the liter produced after air themperature high-density relative reduction Power, among being discharged into upper atmosphere from air duct (7) top, while also reduces axial flow blower energy consumption；Since dry and cold tower is by recirculated water Temperature drops to less than≤30 DEG C, therefore in 15 DEG C~25 DEG C medium temperature periods of summer, it is not necessary to open the evaporative air-cooling tower of water consumption；Summer 15 DEG C~25 DEG C medium temperature periods, to be accounted for the 30~35% of the annual period, due to taking full advantage of 15~20 in north of China DEG C Cryogenic air, since circulating water does not have direct evaporation process, therefore without the evaporation, blowdown, wind of open cycle cooling Blow loss is lost, only the 10% blowdown loss of desalted water, and open type cooling of its amount than this period former reduces more than 60%.

5 DEG C of winter ＞~≤15 DEG C of periods, temperature is relatively low, and dry and cold tower stops spraying, and axis stream is determined according to temperature height Fan operating numbers, ensure that circulating water temperature drops to technological requirement temperature by varying the cooling air volume for entering dry and cold tower (≤30℃)；Dry and cold tower stops spraying, and evaporative air-cooling tower is stopped.

- 5 DEG C of the winter~5 DEG C period, temperature is relatively low, and air temperature rise is big after heat exchange, and air duct (7) draft is big, according to temperature Height determines that dry and cold tower axial flow blower opens quantity, or full cut-off wind turbine, or by wind turbine and fixed frame, as shown in attached drawing 14~15 It is rotated by 90 °, by varying dry and cold tower cooler air capacity is entered, had not only reduced wind turbine power consumption, but also ensure that circulating water temperature drops to technique It is required that≤30 DEG C；Dry and cold tower stops spraying, and evaporative air-cooling tower stop device only works.

- 5 DEG C~DEG C -10 periods of winter, temperature is relatively low, and cooling air dosage reduces, and air temperature rise is big after heat exchange, air duct (7) draft is big, and dry and cold tower axial flow blower is stopped power supply operation, determines that roller shutter air door (5-5) opens quantity according to temperature height, leads to Cross change and enter dry and cold tower cooler air mass flow, roller shutter air door (5-5) opens quantitative commitments circulating water temperature and drops to technological requirement Temperature (≤30 DEG C), dry and cold tower stop spraying, and evaporative air-cooling tower is stopped.

- 10 DEG C~-20 DEG C periods of winter, temperature is low, and cooling air dosage further reduces, and air temperature rise is big after heat exchange, Air duct (7) draft is big, and wind turbine enters generating operating mode, and roller shutter air door is determined according to temperature height and circulating cooling coolant-temperature gage (5-5) opens quantity and operation axial flow blower exciting current, by varying dry and cold tower cooler air capacity, roller shutter air door (5- is entered 5) open quantitative commitments circulating water temperature and drop to technological requirement temperature (≤30 DEG C)；Dry and cold tower stops spraying, and evaporative air-cooling tower stops Only work.

During dry and cold tower operation, remove the cleaning vacuum plant of debris on basket strainer and remove dust stratification soot blowing on tube-bundle fins Device need to equally be run.

Brief description of the drawings

Fig. 1 is existing indirect air cooling primary structure facade schematic diagram；

Fig. 2 is existing indirect air cooling primary structure plane schematic diagram, and existing indirect air cooling, i.e. circulating water in turbine condenser are empty Cold tower, is mainly made of air duct, heat release tube bank, shutter, and high ambient temperature, severe cold, natural wind, dirt, wadding can deteriorate air-cooled property Energy；

Fig. 3 is the facade schematic diagram of a kind of closed cycle cooling process described in this case and device primary structure；

Fig. 4 is the plane schematic diagram of a kind of closed cycle cooling process described in this case and device primary structure；

Fig. 5 is that this case adds the heat release tube bank front view for intersecting reversing tube in heat release tube bundle top；

Fig. 6 is that this case adds the heat release tube bank top view for intersecting reversing tube in heat release tube bundle top；

Fig. 7 is that this case adds the heat release tube bank left view for intersecting reversing tube in heat release tube bundle top；

Fig. 8 is two heat release tube banks and wind turbine composition cooling axonometric projection；

Fig. 9 is wind turbine and fixed frame front view, and the wind turbine quantity in every fixed frame is not limited to 3；

Figure 10 is wind turbine and fixed frame top view；

Figure 11 is wind turbine and fixed frame left view；

Two heat release tube banks of Figure 12 and wind turbine composition cooling triangle, inlet side is in the wind turbine layout figure of operating status, wind turbine Quantity is not limited to quantity shown in figure；

Figure 13 inlet sides wind turbine layout mode left view；

Wind turbine is in the front view of stoppage in transit state during Figure 14 present apparatus is in gravity-flow ventilation work；

Wind turbine is in the left view of stoppage in transit state during Figure 15 present apparatus is in gravity-flow ventilation work；

Figure 16 is in the larger area of humidity, summer high temperature period, the present apparatus and the FB(flow block) of evaporative air-cooling tandem working；

Figure 17 present apparatus spray direction schematic diagrames.

In figure：

1 basket strainer, is mainly used for removing the debris such as the willow catkins flying in the air swum in cooling air, fiber；

2 adverse current gasification zones, when summer needs mist cooling, flow direction by inverse cooling air and spray, in favor of droplet With the heat exchange of air, gasified with accelerating droplet；

3 spray nozzle installation sites；

4 following current gasification zones, the unvaporized droplet in adverse current gasification zone, continue to gasify during flowing with cooling air；

5 wind turbines and fixed frame, and final gasification zone of the droplet in the high-speed rotating turbulent air of fan blade；

5-1 fan blades；

5-2 fixed frames；

5-3 solar or lunar halo；

5-4 motors；

5-5 roller shutter air doors, in fan operation, to roll air door, unresisted unimpeded air, is needing to prevent air During circulation, air door is put down, prevents air circulation；

6 dry and cold heat release tube banks；

7 air ducts；

8 shutters；

9 intersect diversion pipe 1；

10 intersect diversion pipe 2；

11 seals.

Embodiment

Embodiment 1：

40000t/h industrial circulating waters are cooled to 30 by 40 DEG C, this process unit is used instead by open cooling tower.

The device is located in 1300 meters of height above sea level, 35 DEG C, atmospheric pressure 88kPa of summer maximum temperature, relative humidity 30%, dew point temperature 23.2 DEG C of degree；- 20 DEG C of winter minimum temperature, year operation 8760h, original device water consumption 6916000t/y.

Using this process unit, one, the dry and cold tower as shown in Figure of description 2,3 is built, 110 meters of tower height, tower outlet is directly 70 meters of footpath, 120 meters of bottom of towe diameter, total 1,200,000 m of heat dissipation area²；Evaporating heat-exchanging pipe is changed into by filler is cooled down in open cooling tower, It transform evaporative air-cooling tower as.

Main operation control method is as follows：

Temperature≤- 10 DEG C period period 459h, dry and cold tower use gravity-flow ventilation, stop 2/3 wind turbine, close the roller shutter on wind turbine Air door, 1/3 wind turbine utilize air duct surplus draft, load exciting current automatically, extensive in generator operation, retardance cold gas Into the freezing heat release tube bank of dry and cold tower, control and cool down Posterior circle coolant-temperature gage >=20 DEG C ,≤30 DEG C.

- 7 DEG C of ＜ temperature≤0 DEG C period 1568h, dry and cold tower use gravity-flow ventilation, are progressively opened according to temperature in general mood Roller shutter air door, whole air doors are ended as the temperature rises, with ensure recirculated water it is dry and cold after temperature >=20 DEG C ,≤30 DEG C.

0 DEG C of ＜ temperature≤15 DEG C period 2764h, progressively runs as the temperature rises, increases wind turbine quantity, to ensure to circulate Temperature≤30 DEG C after water is dry and cold.

15 DEG C of ＜ temperature≤25 DEG C period 2985h, according to temperature while air quantity is increased, are opened according to relative air humidity With spraying device, as described in the content of the invention technique according to air themperature and relative humidity to air cooling-down, air cooling-down maximum spout Mist amount is limited with relative humidity≤90%, according to the meteorological data of the present embodiment location, 25 DEG C of air after mist cooling, Cooling air temperature into heat release tube bank can drop to 15 DEG C, it is ensured that recirculated water temperature≤30 DEG C after dry and cold.

25 DEG C of ＜ temperature≤35 DEG C period 984h, dry and cold tower wind turbine standard-sized sheet, is sprayed to air humidity 90%, when dry and cold tower goes out During mouth circulating water temperature >=30 DEG C, the evaporative air-cooling unit shown in attached drawing 16, and circulating water temperature, control are exported according to dry and cold tower The water spray of evaporative air-cooling unit, to ensure that evaporative air-cooling unit exports circulating water temperature≤30 DEG C.

Since the present apparatus is just stepped up water spray to humidity 90% only after 15 DEG C of temperature ＞ in dry and cold tower, until temperature ＞ Evaporative air-cooling unit, and the air temperature rise t after the heat exchange of dry and cold heat release tube bundle unit are enabled after 25 DEG C_sWith the sky after mist cooling T drops in temperature_jEqual and its later period, i.e. t_s=t_jAfterwards, the heat Q of recirculated water is only is brought into greatly by the gasification latent heat of water completely Gas.And this period according to local meteorological data, there was only 984h in annual 8760h, also just only 11.2%.So this work Process and equipment whole year water-saving rate can reach more than 75%, 5187000t/y.

Embodiment 2：

Power plant 300Mw strangles in sea indirect air cooling and uses this technique instead.

The device is located in 1300 meters of height above sea level, 35 DEG C, atmospheric pressure 88kPa of summer maximum temperature, relative humidity 30%, dew point temperature 23.2 DEG C of degree；- 20 DEG C of winter minimum temperature, year operation 8760h.

Indirect air cooling heat release tube bank inlet side is strangled in existing sea, according to process unit installation upper fan described in this case and admittedly Determine framework, basket strainer, vacuum plant, compressed air soot-blowing device.

Since the sea Le indirect air cooling island air duct that existing power plant is completed is higher, wind turbine is installed additional plus this case and compensate for the summer Monsoon cylinder exhausting ability, cooling effect can be ensured fully, so being not required to be further added by misting cooling unit, it is only necessary to be strangled former sea empty Cool island, which is done, as above to be transformed.

Main operation control method such as embodiment 1, summer high temperature period wind turbine standard-sized sheet, air quantity increase than original gravity-flow ventilation More than 40%, cooling Posterior circle coolant-temperature gage is completely secured below 33 DEG C, reaches 43 DEG C for 10 DEG C in condenser temperature rise, plus condensing Poor 2.5 DEG C of device end is 45.5 DEG C of condensing side, and summer turbine condenser pressure can be less than 10kPa completely, increases generated energy 5%, winter and blowing the period, accurate more than original shutter due to the control measure of each orientation air quantity, steam turbine completely may be used To be run under water cooling back pressure 4-6kPa pressure, 40% is reduced than original gravity-flow ventilation, the above, can increase generated energy 4%, with Whole year operation 6000h meters, 300Mw units can lower 15 grams of coal consumption per kwh.Coal consumption 2.7 ten thousand t/y, emission reduction CO can be lowered every year₂ 6.75 ten thousand t/y.

Claims

1. a kind of closed cycle cooling process and device, by dry and cold heat release tube bank, axial flow blower and fixed frame, air duct, spray Mist device and evaporative air-cooling composition, it is characterised in that：

In dry and cold heat release tube bank (6) inlet side installation basket strainer (1) of air duct (7) lower periphery, and use and carry displacement function Cleaning vacuum plant continuous circulation dust suction is carried out to basket strainer (1)；Pacify between dry and cold heat release tube bank (6) and basket strainer (1) Fill axial flow blower and fixed frame (5)；Air drops in installation between axial flow blower and fixed frame (5) and basket strainer (1) again The spraying device (3) of temperature, adverse current gasification zone (2) are set between basket strainer (1) and spraying device (3), in spraying device (3) and Following current gasification zone (4) are set between axial flow blower and fixed frame (5)；Due to 15 DEG C~35 DEG C periods of north of China summer, spray Mist device (3) sprays into desalted water through in the air of basket strainer (1) with droplet, gas after the heat of desalted water droplet absorption air Change, while the humidity of air is increased to≤95%, air themperature declines rapidly；

Air after cooling, while being pressurized through axial-flow fan blade (5-1), makes the droplet of remnants in axial-flow fan blade height Completely gasified in the turbulent air that speed rotation produces, so both air themperature is further reduced, make the sky after cooling Heat transfer logarithmic mean temperature difference (LMTD) between gas and dry and cold heat release tube bank (6) is significantly increased, so that air absorbs dry and cold heat release tube bank (6) liberated heat, and droplet is prevented in fin surface gasification relict sediment, reduction air cooling effect；

Spraying device (3) is determined by four groups of sprinkler compositions, the quantity of every group of nozzle by circulating water load：First group, second Group, the 3rd group, the 4th group of spray amount ratio be 1: 2: 4: 8, after combined, the valve of same pressure of supply water lower switch difference group sum Door, you can form the impartial increment that total amount of spray is 1 to 15 times, the switch combination mode for impartial increment of spraying specifically refers to down Table：

When the temperature rises, axial flow blower standard-sized sheet, when circulating water temperature cannot drop to technological requirement value, needs to drop according to cooling air Temperature number, reduces by 1 DEG C, the radix of spray water, selection spraying multiple is sprayed into every kg air.

2. a kind of closed cycle cooling process according to claim 1 and device, it is characterised in that using diameter 1.2 Rice and following small diameter shaft flow fan, axial flow blower wheel hub are run with degree of protection IP55 motor direct-connecteds, with rotating speed, motor bearings Butter lubricates, and fan blade size is small, and the turbulent vortices diameter of generation is small, turbulence pulsation frequency is high, be particularly conducive to air with The heat exchange of mist droplet, can reliably ensure the gasification of droplet in air；Axis stream is not only made using small diameter shaft flow fan For fan blade when non-horizontal mounting is run, blade moment variations in gravitational field are small, damage not easy to fatigue；Power of fan is small, Compensating electric capacity is small, and starting current impact is small, completely can be by the direct start and stop of DCS remote field relays, without by axis Flow fan start stop switch is installed on switchgear house, had not only reduced its investment but also had been easy to the orderly start and stop of cluster；Installed using small axial flow blower Up on thousands of front face areas to tens thousand of square metres, arbitrary region inlet air is uneven either caused by which kind of reason, can lead to The axial flow blower for crossing its corresponding region of DCS automatic start-stops is compensated by；In axial flow blower import installation roller shutter air door (5-5), stop Under axial flow blower linkage close air door, to prevent air blow back.

3. a kind of closed cycle cooling process according to claim 1 and device, it is characterised in that by part axis stream wind The design of electrical motor of machine is dynamotor, in the winter time the lower temperature period, the superfluous exhausting energy of air duct (7), in axial flow blower On be changed into electric energy feedback into electric power system；Carry out the wind turbine in wind direction in blowing summer, face period, since wind-force effectively drops Pressure difference before and after low fan blade, thus motor load can be effectively reduced, motor is in economize on electricity even generator operation.

4. a kind of closed cycle cooling process according to claim 1 and device, it is characterised in that by axial flow blower Fixed frame (5) is designed as having 90 ° of spinfunctions, to be not required to axial flow blower air-supply, it is not required that reduce cooling air During flow, axial flow blower and its fixed frame are rotated by 90 °, to reduce cooling-air resistance, increase cooling air enters The flow of dry and cold heat release tube bundle unit, improves air cooling effect.

5. a kind of closed cycle cooling process according to claim 1 and device, it is characterised in that dry and cold heat release tube bank (6) the heat release tube bank in uses inverted U-shaped structure, its top, which is equipped with, intersects diversion pipe (9) and (10) so that flowing above and below in pipe Recirculated water enters the different zones of windward side by intersecting diversion pipe, can not only reduce dry and cold heat release tube bank (6) isoplanar temperature difference, but also Can winter it is effectively antifreeze；Dry and cold heat release tube bank (6) is combined with the triangular arrangement structure of wind turbine and fixed frame (5)；Outside base tube Roll aluminum fin-stock, fin ratio 15~25；Or flat finned tube or elliptical finned tube or integral fins poling heat release tube bank, heat release Tube bank is arranged as shown in attached drawing 3~4 in air duct lower circumference mode.

6. a kind of closed cycle cooling process according to claim 1 and device, it is characterised in that by oilless (oil free) compressor Compressed air is provided, to the fin in dry and cold heat release tube bundle unit by DCS stored program controlleds, carries out once a day continuous successively Dedusting is purged, to keep the clean good heat radiating ability of fin；The thing that filters out on basket strainer uses Mobile vacuum vacuum cleaner, along ring Shape basket strainer (1) circulation dust suction daily once, both removes the debris on basket strainer, also reduces the air drag of strainer.

7. a kind of closed cycle cooling process according to claim 1 and device, it is characterised in that dry and cold tower runtime Between, removing the cleaning vacuum plant of debris on basket strainer need to equally run with dust stratification soot blower on tube-bundle fins is removed.