CN204786336U - External steam cooling ware connected system in steam turbine heat regenerative system - Google Patents
External steam cooling ware connected system in steam turbine heat regenerative system Download PDFInfo
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- CN204786336U CN204786336U CN201520571743.4U CN201520571743U CN204786336U CN 204786336 U CN204786336 U CN 204786336U CN 201520571743 U CN201520571743 U CN 201520571743U CN 204786336 U CN204786336 U CN 204786336U
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Abstract
The utility model provides an external steam cooling ware connected system in steam turbine heat regenerative system, has the endothermic problem of inclining and being correlated with system device hypertonia of steam cooling ware that external steam cooling ware adopted the heat absorption of feeding water to bring now for the solution. The utility model discloses an external steam cooling ware connected system in steam turbine heat regenerative system includes the bleeder heater, the water -feeding pump, external steam cooling ware, the piping draws gas, feedwater piping and hydrophobic piping, external steam cooling ware is installed in the piping is drawn gas to arbitrary level, the exothermic side entrance and the external steam turbine extraction opening of external steam cooling ware are connected, backheat heater connection in the exothermic side export of external steam cooling ware and the piping that draws gas at external steam cooling ware place, water piping connection is dredged to the endothermic side entrance and the heater that is higher than more than heater second grade at the corresponding levels or the second grade of external steam cooling ware, the heat absorption side export heater connection above with being higher than heater one -level at the corresponding levels or one -level of external steam cooling ware. The utility model is used for in the steam turbine heat regenerative system.
Description
Technical field
The utility model relates to a kind of steam power plant, is specifically related to outer steam cooler connected system in a kind of Steam Turbine Regenerative System.
Background technology
In the heat regenerative system in modern thermal power plant, owing to generally adopting reheating to add extraction cycle mode, after steam reheating, what degree of superheat of drawing gas front of steam turbine is higher, and to higher the drawing gas of the degree of superheat, configuration steam condenser is to improve thermodynamic system efficiency usually.
For the general configuration externally arranged steam cooler that draws gas that below 200MW Turbo-generator Set is higher to the degree of superheat, the overheated heat of drawing gas is absorbed with feedwater, reduce the more senior amount of drawing gas of drawing gas or improve feed temperature, configure external drain cooler simultaneously and improve thermodynamic system efficiency, wherein draw gas side (also known as cold side) bleeder heater 1, steam condenser 2, the connected mode of drain cooler 3 as shown in Figure 1.The connecting system mode that externally arranged steam cooler feedwater side (also known as heat absorbing side) is conventional has and connects (as Fig. 2) and series winding (as Fig. 3) two kinds of modes.
And connect mode as shown in Figure 2: be add steam condenser 4 in the steam bleeding system of the bleeder heater 3 after reheating, extension feedwater in the water supply system between heater 2 and 3, delivers to after heating in the feedwater after heater 1 in steam condenser 4.
Serial arrangement is as shown in Figure 3: feed water after feed-water heater 3,2,1, all supply boiler via the steam condenser 4 be contained on heater 3 steam bleeding system, with the raising feed temperature that draws gas of heater 3.
Fig. 2 with Fig. 3 is two basic modes that externally arranged steam cooler is connected, and can have multiple combination mode in practical application based on these two kinds of modes.
For more than 300MW large turbine-generator set, usually steam cooling section is set in the bleeder heater that draws gas that the degree of superheat is higher, utilizes the overheated heat of steam to improve heater outlet water temperature; Simultaneously for effectively to utilize hydrophobic heat, in heater, also configure hydrophobic cooling section, utilize feedwater to reduce heater condensate temperature and improve thermodynamic system efficiency.As shown in Figure 4, exactly steam condenser and drain cooler are combined in bleeder heater relative to Fig. 1, thus simplify system and equipment.Add and be made up of steam condensation section 1. steam cooling section 2 and hydrophobic cooling section 3.
China Patent No. is that the utility model patent of 201320109802.7 (publication date is on November 06th, 2013) discloses outer steam cooler system in a kind of power plant heat regenerative system and heat regenerative system, otherwise the patent proposes and absorb with heater condensate the scheme that rudimentary overheated heat of drawing gas gets back to the corresponding levels again, steam condenser water side and piping pressure can significantly be reduced, thus reduction system cost, as shown in Figure 5.
Above-mentioned several system (Fig. 2,3,5) all can utilize the degree of superheat of drawing gas to improve heat regenerative system efficiency.
Mode shown in Fig. 2,3, outer steam cooler all adopts high-pressure feed water to absorb the overheated heat of drawing gas, its subject matter existed is that the feed pressure of generating set is very high, conventional Subcritical Units pressure is at about 20MPa, and the extra-supercritical unit feed pressure of development energetically at present reaches about 40MPa.Too high pressure causes pipeline, pipe fitting and appurtenances (as suspension and support, basis, valve actuator etc.) structure other large complicated, cost is high, input-output ratio is low, and this is also the main cause that present 300MW, 600MW unit generally adopts built-in steam condenser.
And built-in steam condenser also exists steam superheat can only utilize in the corresponding levels, the problem that the degree of superheat of drawing gas effective rate of utilization is low.This is also that present professional domain inquires into the main cause configuring externally arranged steam cooler on extra-supercritical unit.
Patent " the outer steam cooler system in a kind of power plant heat regenerative system and heat regenerative system " shown in Fig. 5, utilize the overheated heat that senior heater condensate draws gas to absorb the rudimentary heater of low receipts, significantly reduce the pressure of heat absorption working medium than the mode adopting feedwater to absorb overheated heat, solve too high the brought various problems of heat absorption power pressure.Although system shown in Figure 5 solves too high the brought various problems of heat absorption power pressure, but draw gas after overheated heat get back to mode at the corresponding levels because it adopts senior heater condensate to absorb rudimentary heater, hydrophobic identical with the steam pressure after evaporation, realize circulation can only adopt in two ways: steam condenser is arranged in feed-water heater bottom by exactly, utilize and hydrophobicly realize Natural Circulation with the difference in specific gravity of steam, this mode cloth is set up the restriction that can be subject to space, especially more serious to meeting limited during existing Transformation of Unit; On hydrophobic pipeline, add pump carries out forced circulation to the second exactly, will increase rotary machine like this, make system complex, and cost increases.This patented technology there is not yet this technical scheme of engineer applied for above-mentioned reasons.
Utility model content
The purpose of this utility model is to provide a kind of pressure differential utilized between each heater vapour side, hydrophobic with senior heater, pass through externally arranged steam cooler, overheated heat of being drawn gas by low-voltage high-temperature delivers to the system in senior heater, solves the problem that existing outer steam cooler adopts steam condenser heat absorbing side and the related system equipment hypertonia feeding water and absorb heat and bring; To solve in patent 201310077630.4 simultaneously outer steam cooler due to heater condensate identical with extraction pressure at the corresponding levels, the arrangement of steam condenser is limited or need to install the problems such as circulating pump additional.
In a kind of Steam Turbine Regenerative System of the present utility model, outer steam cooler connected system comprises bleeder heater, feed pump, outer steam cooler, extraction steam pipeline, feed piping and hydrophobic piping, described outer steam cooler is arranged in arbitrary number of level extraction steam pipeline, the cold side entrance of outer steam cooler is connected with external turbine bleed point, the cold side outlet of outer steam cooler is connected with the bleeder heater in the extraction steam pipeline at outer steam cooler place, the heat absorbing side entrance of outer steam cooler is connected with higher than heater condensate pipe more than heater secondary at the corresponding levels or secondary, the heat absorbing side outlet of outer steam cooler is connected with higher than heater vapour side more than heater one-level at the corresponding levels or one-level.
Preferably, described outer steam cooler is evaporation-type steam cooler.
Preferably, described outer steam cooler heat absorbing side entrance accesses hydrophobic heater and compares outer steam cooler heat absorbing side and export the heater progression that connects and at least want high one-level.
Preferably, described outer steam cooler heat absorbing side entrance access cold side outlet institute that hydrophobic heater compares outer steam cooler connect the progression of heater will be more than high secondary or secondary.
Preferably, described outer steam cooler can be arranged in qualified extraction steam pipeline at different levels.
Preferably, described in be arranged on the outer steam cooler in arbitrary number of level extraction steam pipeline quantity be two, two outer steam coolers are connected in any extraction steam pipeline.
The utility model compared with prior art has following beneficial effect:
One, outer steam cooler system of the present utility model, adopt secondary or deliver to more senior heater vapour side after absorbing higher than heater condensate evaporation more than secondary overheated heat of drawing gas, achieve the object rudimentary overheated heat of drawing gas being used for senior heater, with traditional absorb with feeding water overheated heat of drawing gas after deliver to the pressure significantly reducing heat absorbing side working medium compared with more senior heater water side outlet, as 300MW Subcritical Units feed pressure 20MPa, highest heater condensate pressure 5-6MPa, second advanced heater condensate pressure 3-4MPa, will low 4-7 doubly, steam condenser heat absorbing side and the piping be connected and component costs thereof are significantly declined.
Two, outer steam cooler system of the present utility model, adopts secondary or delivers to more senior heater vapour side after absorbing higher than heater condensate evaporation more than secondary overheated heat of drawing gas; The pressure reduction that the utility model make use of heater at different levels carrys out transferring working medium, compare in patent 201310077630.4 to adopt and at the corresponding levels hydrophobicly after steam condenser heat absorption, get back to mode at the corresponding levels to the position no requirement (NR) of steam condenser, also without the need to increasing circulating pump, only additional Valve controlling need be installed.
Three, outer steam cooler system of the present utility model, adopt secondary or absorb heat higher than heater condensate more than secondary, can ensure that hydrophobic inflow temperature to draw gas corresponding full conjunction temperature higher than steam condenser place level, thus cooled condensation problem of drawing gas can not be considered.
Accompanying drawing explanation
Fig. 1 is the connected mode schematic diagram of existing externally arranged steam cooler, drain cooler and heater vapour side (cold side);
Fig. 2 is existing externally arranged steam cooler water side (heat absorbing side) with feed-water heater and downlink connection mode schematic diagram;
Fig. 3 to be existing externally arranged steam cooler water side (heat absorbing side) with feed-water heater contact connected mode schematic diagram;
Fig. 4 is the heater schematic diagram of existing band built-in steam cooling section and hydrophobic cooling section;
Fig. 5 is outer steam cooler connected mode schematic diagram in patent 201310077630.4;
Fig. 6 is the system layout (marking 8 in figure for boiler feedwater adapter) of the first embodiment of the utility model outer steam cooler system;
Fig. 7 is the system layout (mark 8 in figure for boiler feedwater adapter, mark 9 is for taking over for other vapour) of the second embodiment of the utility model outer steam cooler system;
Fig. 8 is the system layout (mark 8 in figure for boiler feedwater adapter, mark 9 is for taking over for other vapour) of the 3rd embodiment of the utility model outer steam cooler system;
Fig. 9 is the system layout (mark 8 in figure for boiler feedwater adapter, mark 9 is for taking over for other vapour) of the 4th embodiment of the utility model outer steam cooler system;
Figure 10 is the system layout (mark 8 in figure for boiler feedwater adapter, mark 9 is for taking over for other vapour) of the 5th embodiment of the utility model outer steam cooler system;
Figure 11 is the system layout (mark 8 in figure for boiler feedwater adapter, mark 9 is for taking over for other vapour) of the 6th embodiment of the utility model outer steam cooler system.
Detailed description of the invention
Below with reference to accompanying drawing, preferred embodiment of the present utility model is described in detail, understands the purpose of this utility model, feature and advantage so that clearer.It should be understood that embodiment shown in the drawings is not the restriction to the utility model scope, and the connotation just in order to technical solutions of the utility model are described.
In the utility model, term " outer steam cooler " refer to install on the bleed steam pipework that the degree of superheat is higher be used for absorbing draw gas most of overheated heat and to be sent in more senior hot device or in feedwater face formula heat exchanger.Its heat absorption working medium can be feedwater or more senior heater hydrophobic, and heat absorption working medium by the heat absorption that heats up in steam condenser, also can be absorbed heat by steam.
Bleeder heater in the utility model can be condensation hydrophone, oxygen-eliminating device or feed-water heater.
Arranged to low pressure by high pressure the arrangement of steamer level and heater in the utility model, namely one-level is drawn gas the highest with the vapour lateral pressure of primary heater, and other each stage pressure reduces successively, and the title that relative pressure is high is senior to draw gas or senior heater.
In the utility model, described outer steam cooler heat absorbing side entrance accesses hydrophobic heater and compares outer steam cooler heat absorbing side and export the heater progression that connects and at least want high one-level.Such as: it is one-level feed-water heater 1 that outer steam cooler heat absorbing side entrance accesses hydrophobic heater, outer steam cooler heat absorbing side exports the heater connect and is at least secondary feed-water heater 2.
In the utility model, described outer steam cooler heat absorbing side entrance accesses the progression that hydrophobic heater compares the heater corresponding to the extraction stage of outer steam cooler place and wants more than high secondary or secondary.Such as shown in Fig. 6: arrange outer steam cooler 5 on three grades of bleed steam pipeworks, corresponding heater is that to access hydrophobic heater be one-level feed-water heater 1 to its heat absorbing side entrance of three grades of feed-water heaters 3.
Fig. 6 illustrates the system layout of the first embodiment according to outer steam cooler connected system of the present utility model.Outer steam cooler connected system of the present utility model is a part for steam turbine power generation circulation system (heat regenerative system).Relevant heat regenerative system is primarily of one-level feed-water heater 1, secondary feed-water heater 2, three grades of feed-water heaters 3, feed pump 4, feed piping, hydrophobic piping, extraction steam pipeline and outer steam cooler 5 form, outer steam cooler 5 is arranged on three grades of higher bleed steam pipeworks of the degree of superheat, the cold side entrance of outer steam cooler 5 is connected with external turbine bleed point, the cold side outlet of outer steam cooler 5 is connected with three grades of feed-water heater 3 vapour sides, the heat absorbing side entrance of outer steam cooler 5 is connected with heater (the i.e. one-level feed-water heater 1) drain pipe higher than heater secondary at the corresponding levels, the heat absorbing side outlet of outer steam cooler 5 is connected with heater (i.e. secondary feed-water heater 2) the vapour side higher than heater one-level at the corresponding levels.Overheated to draw gas in outer steam cooler 5 cooled after send at the corresponding levels drawing gas in three grades of corresponding feed-water heater 3 vapour sides respectively.Hydrophobic evaporation in outer steam cooler 5, produces the vapour side that steam sends into secondary feed-water heater 2 after heat absorption.
During work, three grades are drawn gas after outer steam cooler 5 cools, after the degree of superheat significantly reduces, deliver in three grades of feed-water heater 3 vapour sides, for three grades of feed-water heaters 3.What the drain pipe of one-level feed-water heater 1 accessed hydrophobicly delivers to heated feed water in the vapour side of secondary feed-water heater 2 after outer steam cooler 5 heating evaporation.So just achieve the overheated heat of drawing gas three grades to deliver to secondary and to draw gas the object of heat exchange in corresponding secondary feed-water heater 2, improve heat exchange mean temperature, achieve and improve the Steam Turbine thermal efficiency.
Owing to adopting hydrophobic evaporation endothermic mode in outer steam cooler 5, and the working medium evaporation endothermic amount of unit quantity is much larger than temperature difference heat exchange, therefore, when identical caloric receptivity, required hydrophobic amount is far below the confluent needed for the conventional vapor cooler adopting feedwater to absorb heat; The coefficient of heat transfer of evaporation and heat-exchange is also much larger than heat convection simultaneously, and steam condenser heat exchange area can reduce to some extent.
Fig. 7 illustrates the system layout of the second embodiment according to outer steam cooler connected system of the present utility model.Outer steam cooler connected system of the present utility model is a part for steam turbine power generation circulation system (heat regenerative system).Relevant heat regenerative system is primarily of one-level feed-water heater 1, secondary feed-water heater 2, three grades of feed-water heaters 3, feed pump 4, oxygen-eliminating device 6 (level Four bleeder heater), Pyatyi condensation water heater 7, feed piping, hydrophobic piping, extraction steam pipeline, boiler reheater and outer steam cooler 5 form, outer steam cooler 5 is arranged on the higher level Four extraction steam pipe of the degree of superheat, the cold side entrance of outer steam cooler 5 is connected with external turbine bleed point, the cold side outlet of outer steam cooler 5 is connected with hybrid bleeder heater (oxygen-eliminating device 6), the heat absorbing side entrance of outer steam cooler 5 is connected with bleeder heater (the i.e. one-level feed-water heater 1) drain pipe higher than heater at the corresponding levels three grades, the heat absorbing side outlet of outer steam cooler 5 is connected with heater (i.e. secondary feed-water heater 2) the vapour side higher than heater secondary at the corresponding levels, Pyatyi condensation water heater 7 outlet pipe is connected with oxygen-eliminating device 6.Level Four is sent in oxygen-eliminating device 6 after drawing gas and being cooled in outer steam cooler 5 respectively.That takes from one-level feed-water heater 1 hydrophobicly evaporates in outer steam cooler 5, produces the vapour side that steam sends into secondary feed-water heater 2 after heat absorption, and other simultaneously can supplying needed for production uses vapour.The difference of the present embodiment and embodiment one is: level Four is drawn gas overheated heat utilization in the secondary feed-water heater 2 of secondary higher than it, and the more secondary achieving the degree of superheat of drawing gas utilizes.Due to the full conjunction temperature under the hydrophobic heater corresponding pressure that can only be evaporated to its outlet connection at steam condenser, more secondary utilizes evaporation capacity and more one-level to utilize quantity of steam to reduce, and will calculate the economy of more one-level and more secondary utilization in practical application according to design parameter.Outwardly can provide the steam supply that part is identical with three grades of extraction pressures simultaneously.
Fig. 8 illustrates the system layout of the 3rd embodiment according to outer steam cooler connected system of the present utility model.Outer steam cooler connected system of the present utility model is a part for steam turbine power generation circulation system (heat regenerative system).Relevant heat regenerative system is primarily of one-level feed-water heater 1, secondary feed-water heater 2, three grades of feed-water heaters 3, feed pump utility model 4, oxygen-eliminating device 6 (level Four bleeder heater), Pyatyi condensation water heater 7, feed piping, hydrophobic piping, extraction steam pipeline, boiler reheater and outer steam cooler 5 form, outer steam cooler 5 is arranged on the higher level Four extraction steam pipe of the degree of superheat, the cold side entrance of outer steam cooler 5 is connected with external turbine bleed point, the cold side outlet of outer steam cooler 5 is connected with the vapour side of Pyatyi condensation water heater 7, the heat absorbing side entrance of outer steam cooler 5 is connected with heater (the i.e. secondary feed-water heater 2) drain pipe higher than heater at the corresponding levels three grades, the heat absorbing side outlet of outer steam cooler 5 is connected with the vapour side of the heater (i.e. three grades of feed-water heaters 3) higher than heater secondary at the corresponding levels, Pyatyi condensation water heater 7 is connected with oxygen-eliminating device 6.Overheated cooled in outer steam cooler 5 feeding afterwards in oxygen-eliminating device 6 of drawing gas.Evaporate in outer steam cooler 5 from the hydrophobic of secondary feed-water heater 2, produce steam after heat absorption and send into heated feed water in the vapour side of three grades of feed-water heaters 3, also can need the place of relevant pressure simultaneously for other.
Fig. 9 illustrates the system layout of the 4th embodiment according to outer steam cooler connected system of the present utility model.Outer steam cooler connected system of the present utility model is a part for steam turbine power generation circulation system (heat regenerative system).Heat regenerative system is primarily of one-level feed-water heater 1, secondary feed-water heater 2, three grades of feed-water heaters 3, feed pump 4, oxygen-eliminating device 6 (level Four feed-water heater), Pyatyi condensation water heater 7, feed piping, hydrophobic piping, extraction steam pipeline, boiler reheater and outer steam cooler 5 form, outer steam cooler 5 is arranged on the higher Pyatyi extraction steam pipe of the degree of superheat, the cold side entrance of outer steam cooler 5 is connected with external turbine bleed point, the cold side outlet of outer steam cooler 5 is connected with Pyatyi condensation water heater 7 vapour side, the heat absorbing side entrance of outer steam cooler 5 is connected with heater (the i.e. secondary feed-water heater 2) drain pipe higher than heater secondary at the corresponding levels, the heat absorbing side outlet of outer steam cooler 5 is connected with heater (the i.e. oxygen-eliminating device 6) admission higher than heater one-level at the corresponding levels, the water side of Pyatyi condensation water heater 7 is connected with oxygen-eliminating device 6.Overheated cooled in outer steam cooler 5 feeding afterwards in Pyatyi condensation water heater 7 vapour side of drawing gas.Evaporate in outer steam cooler 5 from the hydrophobic of three grades of heaters, produce steam after heat absorption and send into heated feed water in more senior heater (oxygen-eliminating device 6), also can need the place of relevant pressure simultaneously for other.
Figure 10 illustrates the system layout of the 5th embodiment according to outer steam cooler connected system of the present utility model.Outer steam cooler connected system of the present utility model is a part for steam turbine power generation circulation system (heat regenerative system).Heat regenerative system is primarily of one-level feed-water heater 1, secondary feed-water heater 2, three grades of feed-water heaters 3, feed pump 4, oxygen-eliminating device 6 (level Four feed-water heater), Pyatyi condensation water heater 7, feed piping, hydrophobic piping, extraction steam pipeline, boiler reheater and outer steam cooler 5 form, outer steam cooler 5 is arranged on the higher Pyatyi extraction steam pipe of the degree of superheat, the cold side entrance of outer steam cooler 5 is connected with external turbine bleed point, the cold side outlet of outer steam cooler 5 is connected with Pyatyi condensation water heater 7 vapour side, the heat absorbing side entrance of outer steam cooler 5 is connected with heater (the i.e. secondary feed-water heater 2) drain pipe higher than heater secondary at the corresponding levels, the heat absorbing side outlet of outer steam cooler 5 is connected with heater (i.e. three grades of feed-water heaters 3) the vapour side higher than heater one-level at the corresponding levels, the water side of Pyatyi condensation water heater 7 is connected with oxygen-eliminating device 6.Overheated to draw gas in outer steam cooler 5 cooled after send into respectively in Pyatyi condensation water heater 7 vapour side.Evaporate in outer steam cooler 5 from the hydrophobic of secondary feed-water heater, produce steam after heat absorption and send into heated feed water in the heater (three grades of feed-water heaters 3) of high secondary.Also can need the place of relevant pressure for other simultaneously.
Figure 11 illustrates the system layout of the 6th embodiment according to outer steam cooler connected system of the present utility model.Consider that hydrophobic the delivering to through steam condenser heating is improved more than the efficiency of corresponding extraction stage higher heater unit, but the quantity of steam of the higher generation of pressure is fewer, produce steam pressure higher steam condenser outlet residue of drawing gas overheated larger simultaneously, simultaneously oxygen-eliminating device 6 as contact(-type) heater to the admission degree of superheat without strict demand, therefore, according to principle of the present utility model, level Four bleed steam pipework devises two-stage outer steam cooler, i.e. one-level outer steam cooler 15 and secondary outer steam cooler 25.
Outer steam cooler connected system of the present utility model is a part for steam turbine power generation circulation system (heat regenerative system).Heat regenerative system is primarily of one-level feed-water heater 1, secondary feed-water heater 2, three grades of feed-water heaters 3, feed pump 4, oxygen-eliminating device 6 (level Four feed-water heater), Pyatyi condensation water heater 7, feed piping, hydrophobic piping, extraction steam pipeline, boiler reheater, one-level outer steam cooler 15 and secondary outer steam cooler 25 form, one-level outer steam cooler 15 and secondary outer steam cooler 25 are arranged on level Four extraction steam pipe by input to the output of level Four extraction steam pipe successively, the cold side entrance of one-level outer steam cooler 15 is connected with external turbine bleed point, the cold side outlet of secondary outer steam cooler 25 is connected with oxygen-eliminating device 6, the heat absorbing side entrance of one-level outer steam cooler 15 is connected with heater (the i.e. one-level feed-water heater 1) drain pipe higher than heater at the corresponding levels three grades, the heat absorbing side outlet of one-level outer steam cooler 15 is connected with heater (i.e. secondary feed-water heater 2) the vapour side higher than heater secondary at the corresponding levels, the heat absorbing side entrance of secondary outer steam cooler 25 is connected with heater (the i.e. one-level feed-water heater 1) drain pipe higher than heater at the corresponding levels three grades, the heat absorbing side outlet of secondary outer steam cooler 25 is connected with the heater (i.e. three grades of feed-water heaters 3) higher than heater one-level at the corresponding levels, and Pyatyi condensation water heater 7 water side is connected with oxygen-eliminating device 6.Overheated draw gas to be cooled in one-level outer steam cooler 15 send into secondary outer steam cooler 25 close to after full conjunction temperature corresponding to secondary feed-water heater, continue to be cooled in second steam cooler 25, close to after full conjunction temperature corresponding to three grades of feed-water heater vapour lateral pressures, to be sent in contact(-type) heater oxygen-eliminating device 6.Evaporate in one-level outer steam cooler 15 from the hydrophobic of one-level feed-water heater, produce steam feeding after heat absorption than heated feed water in the heater (secondary feed-water heater 2) of oxygen-eliminating device height secondary; From the hydrophobic evaporation in secondary outer steam cooler 25 of one-level feed-water heater, produce steam after heat absorption and send into heated feed water middle than the higher leveled heater (three grades of feed-water heaters 3) of oxygen-eliminating device; Also can need the place of relevant pressure for other simultaneously.
One-level outer steam cooler 15 and secondary outer steam cooler 25 is designed with, the advantage arranged like this: can realize drawing gas overheated Multi-class propagation and making full use of in the present embodiment.Its principle is: the full conjunction temperature corresponding to the hydrophobic secondary extraction pressure that can only be evaporated in one-level outer steam cooler 15 corresponding to secondary heater 2, level Four is drawn gas and can not fully be cooled, still have the higher degree of superheat, be cooled to close to three grades of corresponding full conjunction temperature of drawing gas through secondary outer steam cooler 25 again, and use in secondary heater 3.So just achieve level Four draw gas the degree of superheat bypass the immediate leadership utilization and Multi-class propagation.
For simplifying system, the hydrophobic piping of one-level feed-water heater 1 is all taken from the water supply that one-level outer steam cooler 15 and secondary outer steam cooler 25 absorb heat.
Claims (6)
1. outer steam cooler connected system in a Steam Turbine Regenerative System, in described a kind of Steam Turbine Regenerative System, outer steam cooler connected system comprises bleeder heater, feed pump, outer steam cooler, extraction steam pipeline, feed piping and hydrophobic piping, it is characterized in that: described outer steam cooler is arranged in arbitrary number of level extraction steam pipeline, the cold side entrance of outer steam cooler is connected with external turbine bleed point, the cold side outlet of outer steam cooler is connected with the bleeder heater in the extraction steam pipeline at outer steam cooler place, the heat absorbing side entrance of outer steam cooler is connected with higher than heater condensate pipe more than heater secondary at the corresponding levels or secondary, the heat absorbing side outlet of outer steam cooler is connected with higher than heater vapour side more than heater one-level at the corresponding levels or one-level.
2. outer steam cooler connected system in a kind of Steam Turbine Regenerative System according to claim 1, is characterized in that: described outer steam cooler is evaporation-type steam cooler.
3. outer steam cooler connected system in a kind of Steam Turbine Regenerative System according to claim 2, is characterized in that: described outer steam cooler heat absorbing side entrance accesses hydrophobic heater and compares outer steam cooler heat absorbing side and export the heater progression connect and at least want high one-level.
4. outer steam cooler connected system in a kind of Steam Turbine Regenerative System according to claim 2, is characterized in that: described outer steam cooler heat absorbing side entrance access cold side outlet institute that hydrophobic heater compares outer steam cooler connect the progression of heater will be more than high secondary or secondary.
5. outer steam cooler connected system in a kind of Steam Turbine Regenerative System according to claim 4, is characterized in that: described outer steam cooler can be arranged in qualified extraction steam pipeline at different levels.
6. outer steam cooler connected system in a kind of Steam Turbine Regenerative System according to claim 4, it is characterized in that: described in be arranged on the outer steam cooler in extraction steam pipeline quantity be two, two outer steam coolers are connected in any extraction steam pipeline.
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| CN201520571743.4U CN204786336U (en) | 2015-07-31 | 2015-07-31 | External steam cooling ware connected system in steam turbine heat regenerative system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104990061A (en) * | 2015-07-31 | 2015-10-21 | 魏熙臣 | Externally-arranged steam cooler connection system in steam turbine heat regenerative system |
| CN105972578A (en) * | 2016-05-03 | 2016-09-28 | 西安热工研究院有限公司 | Steam cooling heater and working method thereof |
| CN105972577A (en) * | 2016-05-03 | 2016-09-28 | 西安热工研究院有限公司 | Steam cooler with heater and working method thereof |
-
2015
- 2015-07-31 CN CN201520571743.4U patent/CN204786336U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104990061A (en) * | 2015-07-31 | 2015-10-21 | 魏熙臣 | Externally-arranged steam cooler connection system in steam turbine heat regenerative system |
| CN104990061B (en) * | 2015-07-31 | 2017-01-25 | 魏熙臣 | Externally-arranged steam cooler connection system in steam turbine heat regenerative system |
| CN105972578A (en) * | 2016-05-03 | 2016-09-28 | 西安热工研究院有限公司 | Steam cooling heater and working method thereof |
| CN105972577A (en) * | 2016-05-03 | 2016-09-28 | 西安热工研究院有限公司 | Steam cooler with heater and working method thereof |
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