CN104279886A - Direct air-cooled condensate header cooling system - Google Patents
Direct air-cooled condensate header cooling system Download PDFInfo
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- CN104279886A CN104279886A CN201410525804.3A CN201410525804A CN104279886A CN 104279886 A CN104279886 A CN 104279886A CN 201410525804 A CN201410525804 A CN 201410525804A CN 104279886 A CN104279886 A CN 104279886A
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Abstract
The invention provides a direct air-cooled condensate header cooling system which comprises a main steam discharge pipe, an ascending pipe, a horizontal distributing pipe, an air cooled condenser and a condensate collecting pipe. Steam discharged from a steam turbine flows into the main steam discharge pipe; the ascending pipe which is vertical and upwards is communicated with the main steam discharge pipe, and steam enters the ascending pipe from the main steam discharge pipe to flow upwards; one end of the horizontal distributing pipe is communicated with the ascending pipe, steam enters the horizontal distribution pipe from the ascending pipe, and the lower portion of the other end of the horizontal distributing pipe is communicated with air cooler pipe bundles; the upper ends of the pipe bundles are communicated with the horizontal distributing pipe; the air cooled condenser is a tubular condenser; the pipe bundles include direct flow pipe bundles and reverse flow pipe bundles, non-condensed steam is condensed in the condensate collecting pipe specifically by spraying cooling water or arranging a cooling heat exchanger in the condensate water collecting pipe. By the direct air-cooled condensate header cooling system, air resistance in the direct air-cooled condenser can be lowered, discharge pressure of the steam turbine is lowered, steam discharge temperature of the steam turbine is lowered, and accordingly heat load entering the inside the direct air cooler is lowered.
Description
Technical field
The present invention relates to a kind of Direct Air-Cooled condensate water header cooling system, particularly a kind of direct air cooled condenser condensate water header 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.
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.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.
CN201652683U discloses a kind of atomization humidifying cooling device dry air that blower fan (8) blows out being carried out moistening and lowering temperature in power station direct air-cooling system, can improve the cooling effectiveness of summer high temperature period air cooling tubes condenser.Its technical scheme refers to Fig. 2 a and Fig. 2 b, and X-type atomizing humidifying temperature-reducing device in direct air-cooling system of power station is made up of water distributing can (13), water supply arm (14), nozzle (15), metal hose (11) etc.
CN201652683U disclosed atomization humidifying cooling device is arranged at the upper horizontal beam (17) of A type frame, does not affect the maintenance of fan drive device, and nozzle, 4 settings, avoids the interference of structure to spraying.The water spraying direction of nozzle is for adding along spray against spray, it is longer with the mechanism of air that nozzle is in high-order layout, meticulous selection has been carried out in nozzle direction, is covered completely by whole fan outlet and spilling scope is little, has the advantage that cooling-down effect is obvious, water consumption is few.Connection by metal hose is selected in the water inlet of X-type atomizing humidifying temperature-reducing device in direct air-cooling system of power station and the import of water supply line, both facilitates installation, additionally reduces mount stress.
Summary of the invention
But the present inventor finds in practice, there is following shortcoming in the atomization humidifying cooling device arranged like this: the waste of a. demineralized water is large, and cool water shower, in air, can not reclaim; Rate of water consumed in electric generator is increased, increases operating cost; B. cooling-air moisture ascends after water spray, heat radiator fin tube-surface humidity increases, and the dust in air is more easily sticked on heat radiator fin pipe, and cause the dirty degree of finned tube stolen goods to strengthen, heat exchange efficiency declines; C. in actual applications, if sprayer installation site or spray system design unreasonable and do not reach spraying effect, the consumption that will cause spray system water is too large, even under equal conditions wet type cooling unit water consumption more than, and form " rain belt " below Air-Cooling Island.
In order to overcome problems of the prior art, the invention provides a kind of Direct Air-Cooled condensate water header cooling system, 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 restrained with air cooling tubes condenser and is communicated with;
Air cooling tubes condenser and condensate water collector pipe;
It is characterized in that, air cooling tubes condenser is trumpet cooler, and its tube bank comprises following current tube bank and adverse current tube bank, arranges cooling device and carry out condensation to the steam do not condensed in condensate water collector pipe.
Preferably, wherein, following current tube bank upper end is communicated with horizontal distributing pipe, and lower end is communicated with condensate collection tank; Adverse current tube bank lower end is communicated with condensate water collector pipe, and upper end is communicated with vacuum-pumping tube.
Preferably, above-mentioned Direct Air-Cooled condensate water header cooling system, adverse current tube bank is wherein in the centre of following current tube bank.
Preferably, above-mentioned Direct Air-Cooled condensate water header cooling system, it is identical that quantity is restrained in adverse current tube bank quantity wherein and the following current being positioned at its both sides.
According to concrete condensation requirement, suitable+suitable+inverse+suitable other modes such as grade can certainly be taked to arrange condenser bundles, time namely, not necessarily require that following current tube bank and adverse current are restrained symmetrical or number is equal.
Preferably, above-mentioned Direct Air-Cooled condensate water header cooling system, wherein, arranges cooling water sprayer unit in condensate water collector pipe, carries out condensation by cooling water spraying being realized to the steam do not condensed.
Preferably, above-mentioned Direct Air-Cooled condensate water header cooling system, wherein, spray pattern is axial spraying or radial spraying or the radial spraying of combination of axially spraying.
Preferably, above-mentioned Direct Air-Cooled condensate water header cooling system, wherein, cooling water comes from the water of this Direct Air-Cooled condensate water header cooling system condensation.
Preferably, above-mentioned Direct Air-Cooled condensate water header cooling system, wherein, cooling water from condensate pump through boosting condensate water and or supplement demineralized water.
Preferably, wherein, carrying out cooling to the cooling water in cooling water sprayer unit is adopt subsidiary engine recirculated water to cool in conjunction with heat exchanger and heat pump in conjunction with heat exchanger or subsidiary engine recirculated water in conjunction with heat pump or subsidiary engine recirculated water; Or, adopt Air cooler or shower towers or Air cooler and shower towers to combine or heat pump or heat exchanger and subsidiary engine recirculated water and Air cooler cool and to combine or heat exchanger and subsidiary engine recirculated water and shower towers cool combination and cool.
Preferably, above-mentioned Direct Air-Cooled condensate water header cooling system, wherein, arranges cooling heat exchanger in condensate water collector pipe, realizes carrying out condensation to the steam do not condensed.
Preferably, above-mentioned Direct Air-Cooled condensate water header cooling system, wherein, cooling heat exchanger is finned tube exchanger or flat fined tube exchanger or screen cloth cooling heat exchanger.
Preferably, above-mentioned Direct Air-Cooled condensate water header cooling system, wherein, cooling heat exchanger is arranged on reverse stream pipe beam entrance place or close reverse stream pipe beam entrance place.
Preferably, wherein, cooling heat exchanger is located in a radial manner near reverse stream pipe beam entrance place or to be axially disposed within reverse stream pipe beam entrance place or to be axially arranged near reverse stream pipe beam entrance place in conjunction with radial manner.
Here axially refer to that cooling heat exchanger level is installed in condensate water collector pipe.
Preferably, above-mentioned Direct Air-Cooled condensate water header cooling system, wherein, carrying out cooling to the cooling water in cooling heat exchanger is adopt subsidiary engine recirculated water to cool in conjunction with heat exchanger and heat pump in conjunction with heat exchanger or subsidiary engine recirculated water in conjunction with heat pump or subsidiary engine recirculated water; Or, adopt Air cooler or shower towers or Air cooler and shower towers to combine or heat pump or heat exchanger and subsidiary engine recirculated water and Air cooler cool and to combine or heat exchanger and subsidiary engine recirculated water and shower towers cool combination and cool.
The present invention by carrying out condensation to steam in condensate water collector pipe, 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.And the tube bank of air cooling tubes condenser is set to the mode of carrying reverse stream pipe bundle in the middle of following current tube bank secretly by the present invention, and cooling effect is better, significantly can reduce water consumption.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of energy-saving cooling device of direct structure disclosed in CN102564157B.
Fig. 2-a and Fig. 2-b is the schematic diagram of CN201652683U disclosed atomization humidifying cooling apparatus structure.
Fig. 3 is the Direct Air-Cooled condensate water header cooling system overall schematic of embodiment 1.
Fig. 4-a is the schematic diagram of the vertical steam flow spray mode of sparge pipe arranged in the condensate water collector pipe of the cooling system of embodiment 1;
Fig. 4-b is the sectional view in F-F direction in Fig. 4-a.
Fig. 5-a is the schematic diagram of the radial steam flow spray mode of sparge pipe arranged in the condensate water collector pipe of the cooling system of embodiment 1;
Fig. 5-b is the sectional view of the condensate water collector pipe in F-F direction in Fig. 5-a;
Fig. 6-a is the schematic diagram of the axial steam flow spray mode of sparge pipe arranged in the condensate water collector pipe of the cooling system of embodiment 1;
Fig. 6-b is the sectional view of the condensate water collector pipe in F-F direction in Fig. 6-a;
Fig. 7-a is the schematic diagram of the sparge pipe axis+Radial Combinations steam flow spray mode arranged in the condensate water collector pipe of the cooling system of embodiment 1;
Fig. 7-b is the sectional view of the condensate water collector pipe in F-F direction in Fig. 7-a;
The Direct Air-Cooled condensate water header cooling system overall schematic of Fig. 8 is the cooling way of embodiment 2 to be subsidiary engine recirculated water be low-temperature receiver+heat pump.
The Direct Air-Cooled condensate water header cooling system overall schematic of Fig. 9 is the cooling way of embodiment 2 to be Air cooler or cooling column be low-temperature receiver.
Figure 10-a-1 is the schematic diagram of the condensate water collector pipe of horizontally disposed finned tube in embodiment 2/band pipe cooling heat exchanger;
Figure 10-a-2 is the sectional view of the condensate water collector pipe in the F-F direction of Figure 10-a-1;
Figure 10-b-1 is the schematic diagram of the horizontally disposed condensate water collector pipe around fin cooling heat exchanger in embodiment 2;
Figure 10-b-2 is the sectional view in the F-F direction of Figure 10-b-1;
Figure 10-c-1 is the schematic diagram of the condensate water collector pipe of horizontally disposed half side fin cooling heat exchanger in embodiment 2;
Figure 10-c-2 is the sectional view in the F-F direction of Figure 10-c-1;
Figure 11 is the overall schematic of the cooling system of embodiment 3.
Figure 12 is the overall schematic at the cooling system of reverse stream pipe beam entrance place level installing cooling heat exchanger in embodiment 4;
Figure 13 is the overall schematic installing the cooling system of 2 groups of cooling heat exchangers in embodiment 4 at reverse stream pipe beam entrance place;
Figure 14-a be in embodiment 4 cooling heat exchanger at the schematic diagram of the horizontally disposed condensate water collector pipe in reverse stream pipe beam entrance place;
Figure 14-b is the sectional view along the condensate water collector pipe in F-F direction in Figure 14-a;
Figure 14-c is the sectional view along the condensate water collector pipe in U-U direction in Figure 14-a;
Figure 15-a is the schematic diagram of the condensate water collector pipe that in embodiment 4, cooling heat exchanger radial direction is arranged;
Figure 15-b is the sectional view in F-F direction in Figure 15-a;
Figure 16-a is the schematic diagram that radial in embodiment 4+axial combination arranges the condensate water collector pipe of cooling heat exchanger;
Figure 16-b is the sectional view in F-F direction in Figure 16-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 ".
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 carry out condensation to steam in condensate water collector pipe, 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 tube bank of air cooling tubes condenser to be set to the mode of carrying reverse stream pipe bundle in the middle of following current tube bank secretly, cooling effect is better, significantly can reduce water consumption.
Elaborate embodiment of the present invention below in conjunction with accompanying drawing, should be understood that, protection scope of the present invention is not limited to given specific embodiments, all meet spirit of the present invention distortion or variant all belong to protection scope of the present invention.
Embodiment 1
See Fig. 3, it is a kind of Direct Air-Cooled condensate water header cooling system, and 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 4 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 bank of condenser pipes;
Air cooling tubes condenser 6 and
Condensate water collector pipe 7;
It is characterized in that, air cooling tubes condenser 6 is trumpet coolers, and its tube bank comprises following current tube bank and adverse current tube bank, and in condensate water collector pipe, 7 carry out condensation to the steam do not condensed.
Wherein, following current tube bank upper end is communicated with horizontal distributing pipe, and lower end is communicated with condensate water collector pipe; Adverse current tube bank lower end is communicated with condensate water collector pipe, and upper end is communicated with vacuum-pumping tube by header.
In this specific embodiments, air cooling tubes condenser 6 is trumpet coolers, and its tube bank comprises following current tube bank and adverse current tube bank, adverse current tube bank is in the centre of following current tube bank, that is, adverse current tube bank both sides are following current tube bank, and the following current tube bank number of preferred both sides is identical with the number that adverse current is restrained.
In this specific embodiments, in condensate water collector pipe, condensation is carried out by being realized by cooling water sprayer unit to the steam do not condensed.Cooling water comes from the water of this Direct Air-Cooled condensate water header cooling system condensation.Direct Air-Cooled condensate water header cooling system condensation water shortage time, can with additional demineralized water as a supplement.The mode of spraying can be axial spraying, can be that radial direction is sprayed, also can is that axially spraying combination radial direction is sprayed.
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, enter into the following current tube bank of air cooling tubes condenser 6, mist cooling in following current tube bank of steam and incondensable gas, vapor portion condensation, condensed water and mist (comprising the steam do not condensed) enter into condensate water collector pipe 7 under gravity, in condensate water collector pipe 7, condensing drip is fallen bottom condensate water collector pipe, mist then under the effect of vavuum pump (not shown) suction force (vacuumizing) level flow to reverse stream pipe bundle section, enter into reverse stream pipe intrafascicular, continue cooling down condensation.
The condensed water of condensate water collector pipe 7, by condensate return pipe 8, flow back in hot well 9, after being boosted by condensate pump 10 to precision processing device of condensation water 11 thus enter into system Inner eycle use:
Then, temperature reducing system is entered: the condensate water after boosting is entered in condensate water collector pipe 7 sprayed by cooling water sprayer unit by valve-isolation of system valve 13-1, flowmeter 12, filter 14, valve-isolating valve, 13-3, flow control valve 15, valve-isolating valve, 13-4, valve-isolating valve, 13-6, cooler 16, valve-isolating valve, 13-7, water spray magnetic valve 17.Cooling water sprayer unit generally includes sparge pipe joint, water distributor and atomizer; As for the parts that concrete sparge pipe joint, water distributor 18, atomizer 19,20 etc. can adopt this area conventional, be not particularly limited here.The low-temperature condensate of high pressure in condensate water collector pipe 7 by nozzle atomization after spray rapidly, water droplet is injected in condensate water collector pipe 7 and runs into mist (comprising the steam do not condensed), because its temperature is low, pressure is high, evaporate rapidly under the environment of comparative high temperature lower pressure, reduce the temperature of mist, make it the object cooled.
When the water shortage of Direct Air-Cooled condensate water header cooling system condensation, additional demineralized water enters aqueduct, in order to supplementary cooling water by valve-isolation of system valve 13-2.In addition, valve-isolation of system valve 13-5 can carry out choice for use as required.Flow control valve 15 is wherein set to adjust the uninterrupted of shower water.
Fig. 4-a and 4-b, Fig. 5-a and Fig. 5-b, Fig. 6-a and Fig. 6-b, and Fig. 7 a and Fig. 7 b shows for spraying the set-up mode of the sprayer unit of cooling water in condensate water collector pipe 7, they are vertical injection, radial spray, axially injection, radial direction+axial combined jet respectively.As can be seen from these figure, water distributor can one-sidedly be arranged, and also can arrange (water distributor 18) in both sides.Here, radial spray refers to that injection direction sprays obliquely along vertical direction, steam flow gateway or inclination, such as being tilted to down 5 to 45 degree directions sprays (here because air cooling tubes condenser tube bank is original in A font layout, steam flow is caused to have certain angle of inclination in condensate water collector pipe (header), like this perpendicular to when spray direction is arranged in steam flow direction, have certain inclination angle, such as angled downward from horizontal 5 to 45 is spent).Wherein, Fig. 4-b is provided with cooling water sprayer unit (by sparge pipe joint, two groups of water distributors 18 in being, and atomizer 19,20 is formed) the structural representation of condensate water collector pipe 7, wherein Fig. 4-a is the cross-sectional view of this condensate water collector pipe 7; Fig. 5-a is that the condensate water collector pipe 7 of the cooling water sprayer unit being provided with radial spray is (by sparge pipe joint, two groups of water distributors 18, and atomizer 19,20 form) cross-sectional view, Fig. 5-b is the sectional view (i.e. longitudinal sectional view) of the condensate water collector pipe 7 in F-F direction in Fig. 5-a; Fig. 6-a is the cross-sectional view of the condensate water collector pipe 7 being provided with the cooling water sprayer unit axially sprayed, Fig. 6-b is that the sectional view of the condensate water collector pipe 7 (illustrate restrain be connected) with following current tube bank and adverse current in F-F direction in Fig. 6-a and longitudinal sectional view (only illustrate one group of water distributor 18 in Fig. 6-b, in fact by sparge pipe joint, two groups of water distributors 18, and atomizer 19,20 is formed); Fig. 7-a is the cross-sectional view of the condensate water collector pipe 7 being provided with the cooling water sprayer unit that radial direction+axis is sprayed, Fig. 7-b is that the condensate water collector pipe 7 in F-F direction in Fig. 7-a (illustrates to restrain with following current tube bank and adverse current and is connected, in fact by sparge pipe joint, two groups of water distributors 18, and atomizer 19,20 form)) sectional view and longitudinal sectional view.
Cooling way (cooler facility) 16 in Fig. 3 can be any conventional cooler, such as, water-cooling cooler, air-cooled cooler, heat pump (with or heat exchanger)+subsidiary engine recirculated water, shower towers or their any combination.Such as cooling infrastructure includes but not limited to following mode: adopt subsidiary engine recirculated water to cool in conjunction with heat exchanger and heat pump in conjunction with heat exchanger or subsidiary engine recirculated water in conjunction with heat pump or subsidiary engine recirculated water.Or cooling infrastructure also can adopt Air cooler or shower towers or Air cooler and shower towers to combine or heat pump or heat exchanger and subsidiary engine recirculated water and air-cooled unit cool and to combine or heat exchanger and subsidiary engine recirculated water and shower towers cool the combination combining and carry out cooling etc. the various type of cooling or any two kinds of types of cooling commonly used this area.Wherein, heat pump can not in conjunction with subsidiary engine recirculated water, but be used alone and be directly discharged in air by the heat in cooling water.
Specifically, here heat pump (with or heat exchanger)+subsidiary engine recirculated water refers to that the low-temperature receiver of unit is subsidiary engine circulating water, and mode can be heat exchanger and or the mode of heat pump, namely, import in subsidiary engine recirculated water by heat by the mode of heat exchanger or heat pump or heat pump+heat exchanger combination, heat is taken away by existing subsidiary engine cooling system.
According to this embodiment, in condensate water collector pipe, spray into cooled condensate water carry out cooling down to mist (comprising the steam do not condensed) and condensation process, in the flow process of horizontal mist, along gas flow, eddy flow sprays into the low-temperature condensate of high-pressure atomization.Low-temperature condensate droplet evaporates gasification rapidly in mist, absorbs amount of heat, thus cools this part mist.Because mist temperature reduces, cause water vapor condensation to be separated out, under eddy flow state, condensation droplet expands rapidly, and final precipitation becomes condensed water, falls bottom condensate collection tank.In addition spraying into low-temperature condensate makes mist be humidified, and more utilizes its heat transfer and accelerates cooling.Swirl-spray also flows to the flow resistance being conducive to reducing mist along mist.
Embodiment 2
See Fig. 8 and Fig. 9, embodiment 2 is roughly the same with embodiment 1, as shown in FIG. 8 and 9, with the difference of Fig. 3 in embodiment 1 be: be not that cooling water sprayer unit is set in condensate water collector pipe 7 to be sprayed by the recirculated water from precision processing device of condensation water 11, but in condensate water collector pipe 7, be horizontally disposed with cooling heat exchanger C (or C1 and or C2), the cooling water of cooling heat exchanger and the identical of embodiment 1, it is the condensate water of this system, when only having the water shortage when the condensation of Direct Air-Cooled condensate water header cooling system, just additional demineralized water.These cooling heat exchangers C is axial arranged along condensate water collector pipe 7, in Fig. 8 concrete adopt subsidiary engine recirculated water+heat pump (with or heat exchanger) as cooling way, in Fig. 9, concrete Air cooler or the shower towers of adopting cools as low-temperature receiver.As shown in Figure 10-a-1 and Figure 10-a-2 (being the sectional view in the F-F direction of Figure 10-a-1), cooling heat exchanger can be finned tube cooling heat exchanger C, also can be band pipe cooling heat exchanger C; Cooling heat exchanger C is arranged in steam discrepancy tube bank place, can be vertical, also can slightly tilt with steam flow direction.As shown in Figure 10-b-1 and Figure 10-b-2 (being the sectional view in the F-F direction of Figure 10-b-1), cooling heat exchanger C is around finned tube cooling heat exchanger C, can arrange one group of shaft core position at condensate water collector pipe 7, also can arrange two groups, two groups of stagger arrangement are placed.As shown in Figure 10-c-1 and Figure 10-c-2 (being the sectional view in the F-F direction of Figure 10-c-1), cooling heat exchanger C can be half side fin cooling heat exchanger C, arranges two groups, makes the fin of two groups staggered relatively, and make fin spaced, all tilt towards axle center.
According to this embodiment, by installing condenser additional in condensate water collector pipe, making the mist cooling down of bottom horizontal flow sheet, the effect of rapid condensation can be reached.
Embodiment 3
As shown in figure 11, similar to Example 1, difference is, cooling water is not from precision processing device of condensation water 11 but direct condensate water of collecting in a part of condensate return pipe 8 recycles back in the cooling water sprayer unit in condensate water collector pipe, realizes axially spraying, radial direction spraying or axially combines radial spraying.
Embodiment 4
See Figure 12 and Figure 13, embodiment 4 is roughly the same with embodiment 2, not that cooling water sprayer unit is set in condensate water collector pipe 7 to be sprayed by the recirculated water from precision processing device of condensation water 11, but cooling heat exchanger C is set, with Fig. 8 difference be: cooling heat exchanger is arranged on the porch that adverse current is restrained, specifically cooling heat exchanger C is horizontally disposed with vertically in condensate water collector pipe 7, its length only reaches the length range in reverse stream pipe beam entrance, and cooling way adopts Air cooler or shower towers as low-temperature receiver.As shown in figure 13, two ends near outermost reverse stream pipe beam entrance in condensate water collector pipe 7 arrange two groups of cooling heat exchanger C1 and cooling heat exchanger C2, the preferred radial direction setting of these two groups of cooling heat exchangers, cooling way be adopt subsidiary engine recirculated water+heat pump (with or heat exchanger), that is, during cooling, the low-temperature receiver of finger unit is subsidiary engine circulating water, and mode can be heat exchanger and or the mode of heat pump, namely, heat is imported in subsidiary engine recirculated water by the mode of heat exchanger or heat pump or heat pump+heat exchanger combination, heat is taken away by existing subsidiary engine cooling system.In this embodiment, the cooling water of cooling heat exchanger and the identical of embodiment 1 are the condensate water of this system, when only having the water shortage when the condensation of Direct Air-Cooled condensate water header cooling system, and just additional demineralized water.And cooling way is cooled as low-temperature receiver by Air cooler or shower towers or subsidiary engine recirculated water.
Wherein, Figure 14-a, Figure 14-b and Figure 14-c illustrates that axially (level) arranges the concrete structure figure of one group of cooling heat exchanger at reverse stream pipe beam entrance place, Figure 14-a illustrates the cross-sectional view arranging one group of cooling heat exchanger C in condensate water collector pipe 7 near outermost reverse stream pipe beam entrance place, Figure 14-b is the sectional view along F-F direction in Figure 14-a, wherein can find out that cooling heat exchanger is horizontally placed on reverse stream pipe beam entrance place, its length only with the length of reverse stream pipe beam entrance place along condensate water collector pipe 7 longitudinal direction, Figure 14-c is the sectional view along U-U direction in Figure 14-a.
Wherein, Figure 15-a and Figure 14-b illustrates the concrete structure figure arranging 2 groups of cooling heat exchangers in reverse stream pipe beam entrance place radial direction, Figure 15-a illustrates and arrange the cross-sectional view that radial direction arranges 2 groups of cooling heat exchanger C in condensate water collector pipe 7, Figure 15-b is the sectional view along the condensate water collector pipe 7 in F-F direction shown in Figure 15-a, can find out, 2 groups of cooling heat exchanger C are along reverse stream pipe beam diameter to setting.
Wherein, Figure 16-a and Figure 16-b illustrates axial at reverse stream pipe beam entrance place, the radial structural representation arranging cooling heat exchanger C1 and cooling heat exchanger C respectively, Figure 16-a illustrates the cross-sectional view arranging cooling heat exchanger C1 and C2 in condensate water collector pipe 7, Figure 16-b is the sectional view along the condensate water collector pipe 7 in F-F direction shown in Figure 15-a, can find out, cooling heat exchanger C1 is along adverse current tube bank axially (level) setting, and cooling heat exchanger C is along reverse stream pipe beam diameter to setting.
According to this embodiment, the temperature of mist in adverse current tube bank can be lowered into, reduce the condensation load of adverse current tube bank, be conducive to adverse current tube bank section by the steam-condensation in mist, improve the condensation effect of system, elevator system vacuum.
Technique effect
Usually when designing Direct Air-Cooled device condensation tube bank, following current tube bundle designs condensation number is about 70%, and adverse current tube bank condensation number is about 30%.During summer condition runs, because environment temperature is higher, it is abundant that usual steam fails condensation in following current tube bank, having excessive steam and on-condensible gas, under the attraction of negative pressure, entered reverse stream pipe by condensate collection tank intrafascicular, cause Direct Air-Cooled device adverse current to restrain condensation load to increase, cannot condensation effect be reached.Because the steam-condensation entered in air-cooler system is incomplete, during arrival exhaust pipeline, intrasystem tolerance and temperature increase, and the tolerance of finding time that unit design runs is certain, this just makes system pressure raise, and exhaust efficiency decreases, and forms vicious circle, the exhaust back pressure of unit is finally caused to raise, delivery temperature raises, and in order to safety, unit is forced to load down and runs.
And use of the present invention, can make to accelerate condensation cooling by the steam of condensate water collector pipe, thus reduce the quantity of steam entered in adverse current tube bank, reduce the temperature of vapor (steam) temperature and incondensable gas, accelerate to realize condensation process.
By misting cooling, the gas temperature entered in tube bank can be reduced, increase humidity, increase disturbance, accelerate the absorption of the steam globule, gather, collide, grow up, descent; Humidity increases and is conducive to increasing the capacity of heat transmission of mixed vapour in tube bank, thus make its more easily and tube bank avoid heat exchange, more easily condense.
In addition, use technology of the present invention can reduce vapour lock in direct air cooled condenser, reduce gas turbine exhaust gas pressure, reduce turbine discharge temperature, thus reduce the thermic load entering Direct Air-Cooled device inside.
Claims (14)
1. a Direct Air-Cooled condensate water header cooling system, 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 restrained with air cooling tubes condenser and is communicated with;
Air cooling tubes condenser and condensate water collector pipe;
It is characterized in that, air cooling tubes condenser is trumpet cooler, and its tube bank comprises following current tube bank and adverse current tube bank, arranges cooling device and carry out condensation to the steam do not condensed in condensate water collector pipe.
2. Direct Air-Cooled condensate water header cooling system according to claim 1, wherein, following current tube bank upper end is communicated with horizontal distributing pipe, and lower end is communicated with condensate collection tank; Adverse current tube bank lower end is communicated with condensate water collector pipe, and upper end is communicated with vacuum-pumping tube.
3. Direct Air-Cooled condensate water header cooling system according to claim 2, wherein, adverse current tube bank is in the centre of following current tube bank.
4. the Direct Air-Cooled condensate water header cooling system according to any one of claim 1-3, wherein, it is identical that quantity is restrained in adverse current tube bank quantity and the following current being positioned at its both sides.
5. the Direct Air-Cooled condensate water header cooling system according to any one of any one claim 1-4, wherein, arranges cooling water sprayer unit, carries out condensation to the steam do not condensed in condensate water collector pipe.
6. Direct Air-Cooled condensate water header cooling system according to claim 5, wherein, spray pattern is axial spraying or radial spraying or the radial spraying of combination of axially spraying.
7. Direct Air-Cooled condensate water header cooling system according to claim 6, wherein, cooling water comes from the water of this Direct Air-Cooled condensate water header cooling system condensation.
8. Direct Air-Cooled condensate water header cooling system according to claim 6, wherein, cooling water from condensate pump through boosting condensate water and or supplement demineralized water.
9. the Direct Air-Cooled condensate water header cooling system according to claim 7 or 8, wherein, carrying out cooling to the cooling water in cooling water sprayer unit is adopt subsidiary engine recirculated water to cool in conjunction with heat exchanger and heat pump in conjunction with heat exchanger or subsidiary engine recirculated water in conjunction with heat pump or subsidiary engine recirculated water; Or, adopt Air cooler or shower towers or Air cooler and shower towers to combine or heat pump or heat exchanger and subsidiary engine recirculated water and Air cooler cool and to combine or heat exchanger and subsidiary engine recirculated water and shower towers cool combination and cool.
10. the Direct Air-Cooled condensate water header cooling system according to any one of claim 1-4, wherein, arranges cooling heat exchanger in condensate water collector pipe, realizes carrying out condensation to the steam do not condensed.
11. Direct Air-Cooled condensate water header cooling systems according to claim 10, wherein, cooling heat exchanger is finned tube exchanger or flat fined tube exchanger or screen cloth cooling heat exchanger.
12. Direct Air-Cooled condensate water header cooling systems according to claim 10 or 11, wherein, cooling heat exchanger is arranged on reverse stream pipe beam entrance place or near reverse stream pipe beam entrance place.
13. Direct Air-Cooled condensate water header cooling systems according to any one of claim 10-12, wherein, cooling heat exchanger is located in a radial manner near reverse stream pipe beam entrance place or to be axially disposed within reverse stream pipe beam entrance place or to be axially arranged near reverse stream pipe beam entrance place in conjunction with radial manner.
14. Direct Air-Cooled condensate water header cooling systems according to claim 10 or 11, wherein, carrying out cooling to the cooling water in cooling heat exchanger is adopt subsidiary engine recirculated water to cool in conjunction with heat exchanger and heat pump in conjunction with heat exchanger or subsidiary engine recirculated water in conjunction with heat pump or subsidiary engine recirculated water; Or, adopt Air cooler or shower towers or Air cooler and shower towers to combine or heat pump or heat exchanger and subsidiary engine recirculated water and Air cooler cool and to combine or heat exchanger and subsidiary engine recirculated water and shower towers cool combination and cool.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410525804.3A CN104279886A (en) | 2014-10-09 | 2014-10-09 | Direct air-cooled condensate header cooling system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410525804.3A CN104279886A (en) | 2014-10-09 | 2014-10-09 | Direct air-cooled condensate header cooling system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105258528A (en) * | 2015-11-05 | 2016-01-20 | 洛阳隆华传热节能股份有限公司 | Efficient composite steam condensation system |
| CN106705697A (en) * | 2017-02-15 | 2017-05-24 | 北京中电云汇技术有限公司 | Cooling compensation type air cooling island system |
| CN108662914A (en) * | 2017-04-01 | 2018-10-16 | 天津华赛尔传热设备有限公司 | A kind of straight channel air cooled condenser |
| CN114636319A (en) * | 2022-05-17 | 2022-06-17 | 杭州国能汽轮工程有限公司 | Water-saving composite evaporative air-cooled condenser |
-
2014
- 2014-10-09 CN CN201410525804.3A patent/CN104279886A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105258528A (en) * | 2015-11-05 | 2016-01-20 | 洛阳隆华传热节能股份有限公司 | Efficient composite steam condensation system |
| CN106705697A (en) * | 2017-02-15 | 2017-05-24 | 北京中电云汇技术有限公司 | Cooling compensation type air cooling island system |
| CN108662914A (en) * | 2017-04-01 | 2018-10-16 | 天津华赛尔传热设备有限公司 | A kind of straight channel air cooled condenser |
| CN114636319A (en) * | 2022-05-17 | 2022-06-17 | 杭州国能汽轮工程有限公司 | Water-saving composite evaporative air-cooled condenser |
| CN114636319B (en) * | 2022-05-17 | 2022-08-19 | 杭州国能汽轮工程有限公司 | Water-saving composite evaporative air-cooled condenser |
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