CN104279885A - Direct air cooling condenser temperature lowering system - Google Patents
Direct air cooling condenser temperature lowering system Download PDFInfo
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- CN104279885A CN104279885A CN201410388002.2A CN201410388002A CN104279885A CN 104279885 A CN104279885 A CN 104279885A CN 201410388002 A CN201410388002 A CN 201410388002A CN 104279885 A CN104279885 A CN 104279885A
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Abstract
The invention relates to a direct air cooling condenser temperature lowering system, which comprises a main steam exhaust pipe, an ascending pipe, a horizontal distribution pipe, an air cooler pipe bundle, a condensate collecting pipe and a temperature lowering device, wherein steam exhausted by a steam turbine flows into the main steam exhaust pipe, the ascending pipe is communicated with the main steam exhaust pipe, and is vertically and upwards arranged, the steam enters the ascending pipe from the main steam exhaust pipe to flow upwards, one end of the horizontal distribution pipe is communicated with the ascending pipe, the steam enters the horizontal distribution pipe from the ascending pipe, the lower part of the other end of the horizontal distribution pipe is communicated with the air cooler pipe bundle, the upper end of the air cooler pipe bundle is communicated with the horizontal distribution pipe, water cooled by the air cooler pipe bundle enters the condensate collecting pipe, the temperature lowering device comprises a cooler and spraying equipment, a cooling medium is cooled by the cooler and enters the spraying equipment, and the spraying equipment is arranged in the horizontal distribution pipe. The direct air cooling condenser temperature lowering system has the advantages that by adopting the cooling device, the back pressure of the steam turbine can be effectively reduced, the vacuum degree of the system is effectively improved, the working efficiency of the steam turbine is effectively improved, and the water consumption amount is saved.
Description
Technical field
The present invention relates to a kind of direct air cooled condenser cooling system, particularly a kind of direct air cooled condenser cooling system being used for steam turbine in thermal power plant.
Background technology
Along with increasingly sharpening of global water resources crisis, air cooling generation technology arises at the historic moment, and is being developed rapidly in recent years.Thermal power plant is water resources consumption rich and influential family, and its water consumption accounts for about 20% of industrial total water consumption.China North China, northwest, the Northeast are coal main product ground, but water resource critical shortage, become the restraining factors of electric power development, economic construction.
Compared with the wet type cooling technology of routine, the maximum advantage of air cooling technique is water saving, adopts Air-cooled Unit that power plant water can be made to reduce 80%, even up to 85%.
Direct Air-Cooled replaces water to cool as cooling medium gas turbine exhaust gas using air, replaces traditional water-cooled condenser with air cooling tubes condenser.Because direct air cooling system directly utilizes dry air to cool, therefore, the cooling capacity of Direct Air-cooled Unit depends on the air themperature entering air cooler, in summer, air themperature is higher, and this will cause air cooler cooling capacity to decline, the vacuum of unit is caused to reduce, back pressure raises, and the actual of unit is exerted oneself lower than design rating, reduces economy and the security of unit.Therefore, Direct Air-cooled Unit, at summer high temperature period output drop, can not oepration at full load be a common problem of air cooling unit in China.
The technology of current solution direct air cooling system Load in Summer limitation problem has two classes: a class does not transform original air cooling system, and newly-increased a set of peak cooling device shares air cooling load; Another kind of is improve air cooling system heat exchange property in high temperature environments by installing cooling device additional.
Sharing the method for air cooling load by separately building a set of peak cooling device, is entered in the spike cooling system set up by the steam extracting fraction in unit exhauster system.This system comes into operation the summer high temperature period, can the deficiency of effective compensation air cooling system cooling capacity, solves the problem that load is limited.Newly-increased cooling system adopts clammy device usually, thus forms the mode of dry wet associating cooling.This method is applied seldom at present, and main cause is that cost is too high, not only need high initial outlay cost, and operating cost is also very high.
Improving the method for air cooling system heat transfer characteristic in high temperature environments by installing cooling device additional, having evaporative cooling and misting cooling two kinds of methods at present.Transpiration-cooled principle is that the demineralized water of atomization is sprayed directly on to heat exchanger surface, utilizes water heat absorption to reduce heat exchanger surface temperature, thus strengthens the heat transfer effect of heat exchanger; The principle of misting cooling is the outlet or the entrance that the demineralized water of atomization are sprayed on cooling blower, water heat absorption is utilized to reduce the temperature of heat exchanger surrounding air, do not have the water droplet gasified to rely on air flowing to carry and enter the heat absorption of air cooler surface, thus improve air cooler heat exchange property, reach the object reducing unit back pressuce.The maximum difference of these two kinds of cooling means is consumptions of demineralized water, and the consumption of misting cooling demineralized water is generally transpiration-cooled several times.But these two kinds of methods all exist following shortcoming: 1) waste demineralized water, cool water shower, in air, can not reclaim, and makes unit water consumption increase, increase operating cost; 2) cooling-air moisture ascends after water spray, heat radiator fin tube-surface moisture ascends, the dust in air more easily sticks on heat radiator fin pipe, causes finned tube easily dirty, reduces heat exchange efficiency; 3) in actual applications, if sprayer installation site or spray system design unreasonable and do not reach spraying effect, spray system water consumption will be caused excessive, even under equal conditions wet type cooling unit water consumption more than, and below Air-Cooling Island formed " rain belt ".
In order to overcome above-mentioned shortcoming, CN102564157B discloses a kind of energy-saving cooling device of direct, is characterized in that spraying cooling process is carried out in jet chimney, instead of traditional carrying out on air cooling tubes condenser or in surrounding air.Its technical scheme refers to Fig. 1.
Energy-saving cooling device of direct disclosed in CN102564157B, gland steam exhauster increase in pipeline (12) the i.e. air cooling tubes condenser admission pipeline of turbine low pressure cylinder (10) adds the water injector be connected with the demineralized water of sweet-water tank (17).The air cooling system of this invention is higher in environment temperature, when running under unit high back pressure condition, the object of the unit output that directly admission of air cooling tubes condenser cooled, can unit back pressuce be reduced, reach energy-saving and cost-reducing, improves.This technology is by installing atomizing water spraying device additional in turbine discharge pipe increase in pipeline, demineralized water atomization is introduced in the admission of air cooling tubes condenser, thus reduces the thermic load of air cooling tubes condenser, improve the vacuum of unit operation.
Energy-saving cooling device of direct disclosed in CN102564157B sprays in gland steam exhauster owing to adopting, and just overcomes the shortcoming existing for the existing method improving air cooling system heat transfer characteristic in high temperature environments by installing cooling device additional.
Summary of the invention
But, the present inventor finds in practice, there is an obvious shortcoming in this technology, because this device carries out misting cooling in turbine discharge increase in pipeline, and increase in pipeline is the main blow-off line of steam turbine, this by the flow resistance of the quantity of steam that increases in main blow-off line and exhaust steam, thus increases the exhaust resistance of steam turbine, causes turbine efficiency to reduce.
In order to overcome problems of the prior art, the invention provides a kind of direct air cooled condenser cooling system, it is characterized in that, it comprises:
Main gland steam exhauster, the vapor stream that steam turbine is discharged becomes owner of gland steam exhauster;
Tedge, tedge is communicated with main gland steam exhauster, and straight up, steam enters tedge by main gland steam exhauster and upwards flows;
Horizontal distributing pipe, horizontal distributing pipe one end is communicated with tedge, and steam enters horizontal distributing pipe by tedge, and horizontal distributing pipe other end bottom is communicated with air cooler tube bundle;
Air cooler tube bundle, air cooler tube bundle upper end is communicated with horizontal distributing pipe; And
Condensate water collector pipe, the water through air cooler tube bundle cooling enters condensate water collector pipe;
Wherein, this Operation system setting has heat sink, and heat sink comprises cooler and sprinkling equipment, and cooling medium enters sprinkling equipment after being cooled by cooler, and sprinkling equipment is arranged in horizontal distributing pipe.
Preferably, above-mentioned direct air cooled condenser cooling system, heat sink wherein also comprises isolating valve, flowmeter, flow control valve and corresponding aqueduct, cooling medium is taken into account flow control valve enter cooler through isolating valve, flow, and the cooling medium through subcooler cooling enters sprinkling equipment through aqueduct.
Preferably, above-mentioned direct air cooled condenser cooling system, wherein, sprinkling equipment comprises water distributor and shower nozzle, and it is inner that water distributor is arranged on horizontal distributing pipe, and for distributing cooling water and connecting shower nozzle, shower nozzle is used for cooling water to be atomized.
Preferably, above-mentioned direct air cooled condenser cooling system, wherein, sprinkling equipment is duct shape sprinkling equipment, and comprise water distributor and multiple shower nozzles thereon, described multiple nozzle tip arrangement becomes spindle or taper, water distributor is arranged in horizontal distributing pipe, forms the atomization cooling section of duct shape with this.
Preferably, above-mentioned direct air cooled condenser cooling system, wherein, sprinkling equipment is circular spray tube.
Preferably, above-mentioned direct air cooled condenser cooling system, wherein, sprinkling equipment is vertical shower pipe, and water distributor is provided with multiple shower nozzle straight down.
Preferably, above-mentioned direct air cooled condenser cooling system, wherein, sprinkling equipment is horizontal shower pipe, and water distributor is provided with the shower nozzle of horizontal direction.
Preferably, above-mentioned direct air cooled condenser cooling system, wherein, before sprinkling equipment is arranged on air cooler tube bundle.
Preferably, above-mentioned direct air cooled condenser cooling system, wherein, sprinkling equipment be arranged on air cooler tube bundle vertically directly over.
Preferably, above-mentioned direct air cooled condenser cooling system, wherein, sprinkling equipment is arranged on air cooler tube bundle porch.
Preferably, above-mentioned direct air cooled condenser cooling system, wherein, can organize sprinkling equipment more.
Preferably, above-mentioned direct air cooled condenser cooling system, wherein, is provided with water spraying control valve in the porch of sprinkling equipment.In the present invention, arrange like this and available protecting control valve electrical equipment and avoiding can be located at sprinkling equipment inside and cause and make moist, thus be conducive to system vacuum tightness.Owing to being provided with multiple spray cooling at diverse location, the diverse location by the pipeline that installs additional cooled condensate water being led to horizontal distributing pipe inside carries out mist cooling cooling.
Preferably, above-mentioned energy-conserving cooling device, wherein, in sprinkling equipment, is also equiped with conduit, is connected on water distributor by nozzle connecting by conduit between water distributor and shower nozzle.
Adopt cooling system of the present invention, summer, use can effectively accelerate exhaust steam in steam turbine condensation process, improved the vacuum of system, reduce turbine back pressure, reduce gas turbine exhaust gas temperature, effectively improve the operating efficiency of steam turbine, reduce the thermic load entering direct air cooling system.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of energy-saving cooling device of direct disclosed in prior art CN102564157B.
Fig. 2 a is the direct air cooled condenser cooling system overall structure schematic diagram of embodiment 1;
Fig. 2 b is the side-looking enlarged drawing of the air cooler tube bundle be connected with horizontal distributing pipe in the direct air cooled condenser cooling system of Fig. 2 a;
Fig. 2 c is the side-looking enlarged drawing of sprinkling equipment in the direct air cooled condenser cooling system of Fig. 2 a;
Fig. 2 d is the enlarged drawing of conduit and the shower nozzle that the water distributor of sprinkling equipment in the direct air cooled condenser cooling system of Fig. 2 a is arranged.
Fig. 3 a is the direct air cooled condenser cooling system overall structure schematic diagram of embodiment 2;
Fig. 3 b is the side-looking enlarged drawing of the sprinkling equipment of the direct air cooled condenser cooling system of Fig. 3 a;
Fig. 3 c is the side-looking enlarged drawing of the air cooler tube bundle be connected with horizontal distributing pipe of the direct air cooled condenser cooling system of Fig. 3 a.
Fig. 4 a is the direct air cooled condenser cooling system overall structure schematic diagram of embodiment 3;
Fig. 4 b is the enlarged drawing of sprinkling equipment in the direct air cooled condenser cooling system of Fig. 4 a.
Fig. 5 a is the direct air cooled condenser cooling system overall structure schematic diagram of embodiment 4;
Fig. 5 b is the side-looking enlarged drawing of the air cooler tube bundle that the direct air cooled condenser cooling system of Fig. 5 a is connected with horizontal distributing pipe;
Fig. 5 c is the partial enlargement structural representation of the sprinkling equipment of the direct air cooled condenser cooling system of Fig. 5 a.
Fig. 6 a is the direct air cooled condenser cooling system overall structure schematic diagram of embodiment 5;
Fig. 6 b is the side-looking enlarged drawing of the air cooler tube bundle be connected with horizontal distributing pipe in the direct air cooled condenser cooling system of Fig. 6 a;
Fig. 6 c is the partial enlargement structural representation of the sprinkling equipment of the direct air cooled condenser cooling system of Fig. 6 a.
Fig. 7 a is the direct air cooled condenser cooling system overall structure schematic diagram of embodiment 6;
Fig. 7 b is the partial enlarged drawing of horizontal distributing pipe and sprinkling equipment in the energy-conserving cooling device of Fig. 7 a.
Detailed description of the invention
The thermal power transfer of steam is mechanical energy by steam turbine, is one of capital equipment of thermoelectricity and nuclear power, generates electricity for drawing generator.With regard to condensing turbine, the initial steam produced from boiler enters high pressure cylinder via main valve, then enters intermediate pressure cylinder, then enters low pressure (LP) cylinder, finally enters condenser.The heat energy of steam, at steam turbine internal consumption, becomes the kinetic energy of steam, then promotes to fill vaned turbine rotor, is finally converted into mechanical energy.Back pressure makes steam turbine export exhaust steam pressure in fact, and everybody is commonly called as back pressure.Refer to the certain pressure finished the later steam of merit and also have.Back pressure is lower, and turbine inlet steam pressure is larger with the difference of outlet exhaust steam pressure, and being more conducive to the thermal energy of steam is mechanical energy, and generating efficiency is higher.
Traditional water-cooled condenser is replaced with air cooling tubes condenser, water consumption can be saved, but in summer because air themperature is higher, the cooling effect of steam is deteriorated, just needs to install cooling device additional, major part cooling device is all spray outside pipe, which results in following problem: 1) waste demineralized water, cool water shower, in air, can not reclaim, unit water consumption is increased, increases operating cost; 2) cooling-air moisture ascends after water spray, heat radiator fin tube-surface moisture ascends, the dust in air more easily sticks on heat radiator fin pipe, causes finned tube easily dirty, reduces heat exchange efficiency; 3) in actual applications, if sprayer installation site or spray system design unreasonable and do not reach spraying effect, spray system water consumption will be caused excessive, even under equal conditions wet type cooling unit water consumption more than, and below Air-Cooling Island formed " rain belt ".
In order to address these problems, CN102564157B proposes the concept of spray in pipe, exactly carry out misting cooling in turbine discharge increase in pipeline, by such technical measures, CN102564157B solves pipe and sprays the problem caused outward.But, because increase in pipeline is the main blow-off line of steam turbine, which increases the flow resistance of quantity of steam in main blow-off line and exhaust steam, thus increase the exhaust resistance of steam turbine, cause turbine efficiency to reduce.
The present inventor is for this problem, through studying for a long period of time and putting into practice in a large number, if find to spray in the horizontal pipe that exhaust steam enters condenser, then both can solve pipe and spray the problem caused outward, and the exhaust steam flow resistance increase that to spray in increase in pipeline and cause can have been solved again thus cause the problem that the increase of gas turbine exhaust gas resistance causes turbine efficiency to reduce.On this basis, the present inventor completes the present invention.The present inventor also finds, if the demineralized water of cooling is sprayed after subcooler cooling in horizontal distributing pipe again, better effects if, significantly can reduce water consumption.
Explain the present invention below by specific embodiment, should be understood that, protection scope of the present invention is not limited to given embodiment, all meet spirit of the present invention distortion or variant all belong to protection scope of the present invention.
Embodiment 1
See Fig. 2 a, Fig. 2 b, Fig. 2 c and Fig. 2 d, it is a kind of direct air cooled condenser cooling system, and as shown in Figure 2 a, it comprises:
Main gland steam exhauster 3, the vapor stream that steam turbine is discharged becomes owner of gland steam exhauster 3;
Tedge 4, tedge is communicated with main gland steam exhauster 3, and straight up, steam enters tedge 4 by main gland steam exhauster 3 and upwards flows;
Horizontal distributing pipe 5, horizontal distributing pipe 5 one end is communicated with tedge 4, and steam enters horizontal distributing pipe 5 by tedge 4, and horizontal distributing pipe 5 other end bottom is communicated with air cooler tube bundle 6;
Air cooler tube bundle 6, air cooler tube bundle upper end is communicated with horizontal distributing pipe 5; And
Condensate water collector pipe 7, the water through air cooler tube bundle cooling enters condensate water collector pipe 7; The condensed water entering condensate water collector pipe 7 flow back into (not shown) in the hot well of exhaust apparatus under gravity by condensate return pipe.
Wherein, this Operation system setting has heat sink, and heat sink comprises cooler and sprinkling equipment, and cooling medium demineralized water enters sprinkling equipment after being cooled by cooler, and sprinkling equipment to be arranged in horizontal distributing pipe 5.
Sprinkling equipment comprises sparge pipe joint 18, water distributor 19, conduit 20, shower nozzle 21, also has the water spraying control valve 17 for controlling the water yield in sprinkling equipment outer setting in addition.
Fig. 2 b is the side view of the air cooler tube bundle 6 be connected with horizontal distributing pipe 5, wherein direct air cooled condenser is that A font is arranged, its structure is the conventional structure that power station is commonly used, and can see that sparge pipe joint 18, water distributor 19 and conduit 20 and shower nozzle 21 are in horizontal distributing pipe 5 by this side view; Fig. 2 c be in Fig. 2 a sprinkling equipment be arranged on the annular water distributor 19 of horizontal distributing pipe 5 inside side-looking enlarged drawing, as can be seen from 2c, connect water distributor 19 and the pipeline being provided with water spraying control valve 17 in the horizontal distributing pipe 5 of sparge pipe joint 18 insertion, the cooling medium demineralized water entered in water distributor 19 imports in shower nozzle 21 by conduit 20; Fig. 2 d is the enlarged drawing being arranged at conduit 20 on water distributor 19 and shower nozzle 21.
Its workflow is as follows: steam turbine 1 steam discharge enters in steam exhaust device 2, through main gland steam exhauster 3, tedge 4, horizontal distributing pipe 5, demineralized water (is monitored and the statistics water yield by flowmeter 12, so that control & monitor), isolating valve, filter 14 (the foreign material in filtering condensate water, with anti-clogging shower nozzle 21), isolating valve, flow control valve 15 (the control water yield), isolating valve, entering cooler 16 (also can be as required, cooler 16 is not directly entered) via flow control valve 15, to reduce the temperature of water, thus raising cooling effect, reduce and spray into the intrasystem water yield and reduce and bring intrasystem quantity of steam into, namely the thermic load bearing a part of Direct Air-Cooled device is equivalent to.By water spraying control valve 17, (it is more than 1 group or 1 group to cooled low temperature demineralized water, 2 groups are set in this embodiment, control the water spray switch being installed in horizontal distributing pipe 5 some section or a certain group), sparge pipe joint 18 (is installed on horizontal distributing pipe 5, its one end connects water distributor 19, the pipeline being provided with water spraying control valve 17 of other end connection horizontal distributing pipe 5 outside, do not using the season of cooling system, can by its shutoff, when operation or Maintenance and Repair, be easy to open and use), (installing is fixed in horizontal distributing pipe 5 water distributor 19, be used to provide and distribute condensate water and firm conduit 20 and shower nozzle 21 can be supported), conduit 20 water pipe of shower nozzle 21 (be used for be connected and fixed), spray rapidly after shower nozzle 21 is atomized, water distributor 19 is in annular, multiple shower nozzle around this water distributor annulus circumference and design in water distributor that (this water distributor can be provided with multiple, be provided with 2 water distributors in this embodiment) on, spray pattern is annular swirl-spray, water droplet is injected to the exhaust steam running into steam turbine in horizontal distributing pipe 5, the water droplet that temperature is low can evaporate rapidly under the environment that temperature high pressure is low, reduce the temperature of exhaust steam, thus reach reduction exhaust steam temperature, make it the object cooled.Cooled exhaust steam enters into air cooler tube bundle 6, enters condensate water collector pipe 7 after further condensation, then does further process.
Wherein, isolating valve comprises isolating valve 13-1 respectively, 13-2, 13-3 and 13-4, demineralized water also can not via flow control valve 15 as required, directly enter cooler 16 via isolating valve 13-4, here cooler 16 also can heat exchanger, can be the parts of handpiece Water Chilling Units or heat exchanger and heat pump combination, as long as conventional components or the unit that can play cooling effect all can here use, wherein cooling way and low-temperature receiver can adopt auxiliary machine circulating cooling water, also small-sized devaporizer can be adopted, also handpiece Water Chilling Units can be adopted, also can not cool, and directly enter system spraying.
Embodiment 2
See Fig. 3 a-Fig. 3 c, Fig. 3 a is the overall structure schematic diagram of the direct air cooled condenser cooling system of embodiment 2, Fig. 3 b is the side-looking enlarged drawing of the sprinkling equipment of the direct air cooled condenser cooling system of Fig. 3 a, and Fig. 3 c is the side-looking enlarged drawing of the air cooler tube bundle be connected with horizontal distributing pipe 5 in the direct air cooled condenser cooling system of Fig. 3 a.As can be seen from Fig. 3 a-Fig. 3 c, the direct air cooled condenser cooling system of embodiment 2 is roughly the same with the direct air cooled condenser cooling system of embodiment 1, difference is, water spraying control valve 17 is set to 1 group, and water distributor is duct shape, and multiple shower nozzle is provided thereon is arranged in spindle or taper, thus form the atomization cooling section of duct shape, under the effect of shower nozzle, form violent whirl, accelerate cooling down.
Embodiment 3
See Fig. 4 a and Fig. 4 b, it is the direct air cooled condenser cooling system of embodiment 3.Wherein, Fig. 4 a is the overall structure schematic diagram of the direct air cooled condenser cooling system of embodiment 3, and Fig. 4 b is the enlarged drawing of sprinkling equipment in the direct air cooled condenser cooling system of Fig. 4 a.As can be seen from Fig. 4 a-Fig. 4 b, the direct air cooled condenser cooling system of embodiment 3 is roughly the same with the direct air cooled condenser cooling system of embodiment 1, difference is, water spraying control valve 17 is set to 1 group, water distributor 19 is arranged on the region fore of air cooler tube bundle 6, be the pipeline that both ends are closed, multiple shower nozzle 21 is vertically downward set below water distributor 19, to realize carrying out vertical spray in front, air cooler tube bundle district.That is, when steam does not enter the front end of tube bank, in this region, spray the condensate water of low-temperature atomizing at shower nozzle 21, gasify rapidly and reduce temperature.
Embodiment 4
See Fig. 5 a-Fig. 5 c, it is the direct air cooled condenser cooling system structural representation of embodiment 4; Wherein, Fig. 5 a is the overall structure schematic diagram of the direct air cooled condenser cooling system of embodiment 4, Fig. 5 b is the side-looking enlarged drawing of the air cooler tube bundle be connected with horizontal distributing pipe 5 in the direct air cooled condenser cooling system of Fig. 5 a, and Fig. 5 c is the partial enlargement structural representation of the sprinkling equipment of the direct air cooled condenser cooling system of Fig. 5 a.As can be seen from Fig. 5 a-Fig. 5 c, the direct air cooled condenser cooling system of embodiment 4 is roughly the same with the direct air cooled condenser cooling system of embodiment 3, difference is, water spraying control valve 17 is set to 1 group, water distributor 19 is arranged on directly over the region of air cooler tube bundle 6, to realize carrying out vertical (vertically) spraying above air cooler tube bundle district.Wherein, when steam is in horizontal distributing pipe 5, when entering tube bank section, upper end in this region, shower nozzle 21 sprays low temperature demineralized water, and part atomization reduces the vapor (steam) temperature in horizontal distributing pipe 5, it is inner that part condensation water smoke sweeps along steam to enter into tube bank, cooling of gasifying further.
Embodiment 5
See Fig. 6 a-Fig. 6 c, it is the direct air cooled condenser cooling system structural representation of embodiment 5; Wherein, Fig. 6 a is the overall structure schematic diagram of the direct air cooled condenser cooling system of embodiment 5, Fig. 6 b is the side-looking enlarged drawing of the air cooler tube bundle be connected with horizontal distributing pipe 5 in the direct air cooled condenser cooling system of Fig. 6 a, and Fig. 6 c is the partial enlargement structural representation of the sprinkling equipment of the direct air cooled condenser cooling system of Fig. 6 a.As can be seen from Fig. 6 a-Fig. 6 c, the direct air cooled condenser cooling system of embodiment 5 is roughly the same with the direct air cooled condenser cooling system of embodiment 4, difference is, water spraying control valve 17 is set to 1 group, water distributor 19 is arranged on the immediately above of air cooler tube bundle, each tube bank porch arranges a shower nozzle 21 (here, shower nozzle 21 arranged direction of restraining 6 porch is preferably consistent with the incline direction of tube bank 6), conduit 20 is used for connecting water distributor 19 and shower nozzle 21, condensate water or other cooling mediums are transported in shower nozzle 21 from water distributor 19, to realize spraying in air cooler tube bundle porch.That is, in horizontal distributing pipe 5, when steam enters tube bank, tube bank porch, sprays low-temperature condensate at shower nozzle 21, and it is inner that the cryogenic temperature condensation water smoke of atomization sweeps along steam to enter into tube bank, gasification cooling.
Embodiment 6
See Fig. 7 a-Fig. 7 b, it is the direct air cooled condenser cooling system structural representation of embodiment 6; Wherein, Fig. 7 a is the overall structure schematic diagram of the direct air cooled condenser cooling system of embodiment 6, and Fig. 7 b is the side-looking enlarged drawing of horizontal distributing pipe and sprinkling equipment in the direct air cooled condenser cooling system of Fig. 7 a.As can be seen from Fig. 7 a-Fig. 7 b, the direct air cooled condenser cooling system of embodiment 6 is roughly the same with the direct air cooled condenser cooling system of embodiment 1, difference is, water spraying control valve 17 is set to 1 group, water distributor 19 is arranged on the region fore of air cooler tube bundle, the shower nozzle 21 water distributor 19 being arranged horizontal direction (can be arranged through tubes connection shower nozzle here, also directly can be fixed on water distributor by shower nozzle without the need to conduit; Be designed specifically to the latter and ductless embodiment in this embodiment, water distributor 19 plays the effect of stationary nozzle, this sprinkler design is swirl flow nozzle, its volume and jet flow amount all larger), to realize at air cooler tube bundle region fore horizontal spraying, namely, when steam does not enter the front end of tube bank, in this region, in the condensate water of shower nozzle level rotary flow ejection low-temperature atomizing, gasify rapidly and reduce temperature.
Technique effect
The direct air cooled condenser cooling system of the embodiment of the present invention 1 is applied to certain thermal power plant, the model of its Turbo-generator Set is CZK200-12.75/0.981/535/535, below table 1 show power plant to the design parameter of this air cooling tubes condenser cooling system requirement, the actual operation parameters of this equipment and take the operational factor detailed comparisons situation after sprinkling equipment of the present invention.
Table 1 design parameter---actual operation parameters---takes the contrast table of spray measure operational factor
As can be seen from the above table, after using technology of the present invention, back pressure and the exhaust steam pressure of steam exhaust device reduce 6.6KPa, can reduce the heat that steam enters air cooling system, improve the vacuum of system, thus improve the operating efficiency of steam turbine.
Claims (13)
1. a direct air cooled condenser cooling system, is characterized in that, it comprises:
Main gland steam exhauster, the vapor stream that steam turbine is discharged becomes owner of gland steam exhauster;
Tedge, tedge is communicated with main gland steam exhauster, and straight up, steam enters tedge by main gland steam exhauster and upwards flows;
Horizontal distributing pipe, horizontal distributing pipe one end is communicated with tedge, and steam enters horizontal distributing pipe by tedge, and horizontal distributing pipe other end bottom is communicated with air cooler tube bundle;
Air cooler tube bundle, air cooler tube bundle upper end is communicated with horizontal distributing pipe; And
Condensate water collector pipe, the water through air cooler tube bundle cooling enters condensate water collector pipe;
Wherein, this Operation system setting has heat sink, and heat sink comprises cooler and sprinkling equipment, and cooling medium enters sprinkling equipment after being cooled by cooler, and sprinkling equipment is arranged in horizontal distributing pipe.
2. direct air cooled condenser cooling system according to claim 1, wherein, heat sink also comprises:
Isolating valve, flowmeter, flow control valve and corresponding aqueduct, cooling medium is taken into account flow control valve enter cooler through isolating valve, flow, and the cooling medium through subcooler cooling enters sprinkling equipment through aqueduct.
3. direct air cooled condenser cooling system according to claim 1 and 2, wherein, sprinkling equipment comprises water distributor and shower nozzle, and it is inner that water distributor is arranged on horizontal distributing pipe, and for distributing cooling water and connecting shower nozzle, shower nozzle is used for cooling water to be atomized.
4. the direct air cooled condenser cooling system according to any one of claim 1-3, wherein, sprinkling equipment is duct shape sprinkling equipment, comprise water distributor and multiple shower nozzles provided thereon, described multiple nozzle tip arrangement becomes spindle or taper, water distributor is arranged in horizontal distributing pipe, forms the atomization cooling section of duct shape with this.
5. the direct air cooled condenser cooling system according to any one of claim 1-3, wherein, sprinkling equipment is circular spray tube.
6. the direct air cooled condenser cooling system according to any one of claim 1-3, wherein, sprinkling equipment is vertical shower pipe, and water distributor is provided with multiple shower nozzle straight down.
7. the direct air cooled condenser cooling system according to any one of claim 1-3, wherein, sprinkling equipment is horizontal shower pipe, and water distributor is provided with the shower nozzle of horizontal direction.
8. the direct air cooled condenser cooling system according to any one of claim 1-7, wherein, before sprinkling equipment is arranged on air cooler tube bundle.
9. the direct air cooled condenser cooling system according to any one of claim 1-7, wherein, sprinkling equipment be arranged on air cooler tube bundle vertically directly over.
10. the direct air cooled condenser cooling system according to any one of claim 1-7, wherein, sprinkling equipment is arranged on air cooler tube bundle porch.
11. direct air cooled condenser cooling systems according to any one of claim 1-7, wherein, are provided with and organize sprinkling equipment more.
12. direct air cooled condenser cooling systems according to any one of claim 1-11, wherein, are provided with water spraying control valve in the porch of sprinkling equipment.
13. direct air cooled condenser cooling systems according to any one of claim 1-12, wherein, sprinkling equipment comprises water distributor and shower nozzle, and it is inner that water distributor is arranged on horizontal distributing pipe, and for distributing cooling water and connecting shower nozzle, shower nozzle is used for cooling water to be atomized.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112081633A (en) * | 2020-09-29 | 2020-12-15 | 中国大唐集团科学技术研究院有限公司西北电力试验研究院 | Device for realizing backpressure reduction and waste heat utilization of direct air cooling unit |
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| CN102564157A (en) * | 2011-12-26 | 2012-07-11 | 西安热工研究院有限公司 | Energy-saving cooling device of direct air cooling system |
| CN202853424U (en) * | 2012-09-14 | 2013-04-03 | 山西三元和能源科技有限公司河南分公司 | System for improving vacuum degree of air cooling system of power plant |
| CN103527267A (en) * | 2013-10-14 | 2014-01-22 | 西安热工研究院有限公司 | Direct air-cooling unit system with plate-type evaporative condenser unit adopted |
| CN203479063U (en) * | 2013-07-11 | 2014-03-12 | 欧尔东有限公司 | Special purification water-saving device for medical waste treatment |
| CN203700098U (en) * | 2014-01-23 | 2014-07-09 | 西安协力动力科技有限公司 | Device for treating power plant waste water with steam waste heat of thermal power plant |
-
2014
- 2014-08-08 CN CN201410388002.2A patent/CN104279885B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5078205A (en) * | 1988-05-10 | 1992-01-07 | Energiagazdalkodasi Intezet | Cooling system for condensing the exhaust steam of steam turbine plants, particularly of power plants |
| DE10333009B3 (en) * | 2003-07-18 | 2004-08-19 | Gea Energietechnik Gmbh | Steam condensation device for steam turbine power generation plant uses cooling tower with natural air draught with upper condensers above cooling units supplied with heated cooling water from surface condenser |
| CN102564157A (en) * | 2011-12-26 | 2012-07-11 | 西安热工研究院有限公司 | Energy-saving cooling device of direct air cooling system |
| CN202853424U (en) * | 2012-09-14 | 2013-04-03 | 山西三元和能源科技有限公司河南分公司 | System for improving vacuum degree of air cooling system of power plant |
| CN203479063U (en) * | 2013-07-11 | 2014-03-12 | 欧尔东有限公司 | Special purification water-saving device for medical waste treatment |
| CN103527267A (en) * | 2013-10-14 | 2014-01-22 | 西安热工研究院有限公司 | Direct air-cooling unit system with plate-type evaporative condenser unit adopted |
| CN203700098U (en) * | 2014-01-23 | 2014-07-09 | 西安协力动力科技有限公司 | Device for treating power plant waste water with steam waste heat of thermal power plant |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112081633A (en) * | 2020-09-29 | 2020-12-15 | 中国大唐集团科学技术研究院有限公司西北电力试验研究院 | Device for realizing backpressure reduction and waste heat utilization of direct air cooling unit |
| CN112081633B (en) * | 2020-09-29 | 2024-03-29 | 中国大唐集团科学技术研究院有限公司西北电力试验研究院 | Device for realizing back pressure reduction and waste heat utilization of direct air cooling unit |
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