CN201972746U - Double reheating thermal system - Google Patents
Double reheating thermal system Download PDFInfo
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- CN201972746U CN201972746U CN201120073892XU CN201120073892U CN201972746U CN 201972746 U CN201972746 U CN 201972746U CN 201120073892X U CN201120073892X U CN 201120073892XU CN 201120073892 U CN201120073892 U CN 201120073892U CN 201972746 U CN201972746 U CN 201972746U
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Abstract
The utility model provides a double reheating thermal system, including a high pressure cylinder, a first intermediate pressure cylinder, a second intermediate pressure cylinder and a low-pressure cylinder. The high pressure cylinder, the first intermediate pressure cylinder, the second intermediate pressure cylinder and the low-pressure cylinder are connected in turns. A first reheater is set between the high pressure cylinder and the first intermediate pressure cylinder. A second reheater is set between the first intermediate pressure cylinder and the second intermediate pressure cylinder. A first backpressure steam-extraction machine obtains the steam from the high pressure cylinder, which is not reheated by the first reheater and drives the first backpressure team-extraction machine. A second backpressure steam-extraction machine obtains the steam from the first intermediate pressure cylinder, which is not reheated by the second reheater and drives the second backpressure steam-extraction machine and at least one backheating device. Compared with the present double reheating thermal system, the utility model can improve the efficiency of thermodynamic cycle.
Description
Technical field
The utility model is applicable to the double reheat Turbo-generator Set, relates in particular to a kind of draw gas thermodynamic system of double reheat of little machine of back pressure type that disposes.
Background technique
The re-heating subsystem in the thermal power plant of the employing double reheat technology of prior art is roughly: the steam of having done the part merit in the main steam turbine is drawn once more heat, draw the back-steam turbine then and continue acting, to improve thermodynamic system efficiency.
Adopt the firepower electrical plant of double reheat technology to dispose heat regenerative system usually, the heat that draws gas with main steam turbine comes heat-setting water and feedwater by heater, the heat that draws gas all is recovered in the working-medium water, reduces the latent heat of vaporization discharging that circulating water is taken away, to improve thermodynamic system efficiency.
The best degree of superheat of drawing gas is low, with superheat section energy acting, and latent heat of vaporization portion of energy is used for backheat.But to the thermal power plant of re-heating subsystem is arranged, drawing gas after the heat is subjected to reheating effect again, and temperature improves, and the degree of superheat increases thereupon, makes the energy that can be used to do work be used for heat-setting water and feedwater, influenced the efficient of thermodynamic cycle.
Fig. 1 and Fig. 2 show the double reheat thermodynamic system of two kinds of prior aries respectively.
In the thermodynamic system that double reheat main frame shown in Figure 1 draws gas, this thermodynamic system mainly comprises: high-pressure cylinder 101, the first intermediate pressure cylinder 102-1, the second intermediate pressure cylinder 102-2, low pressure (LP) cylinder 103, the first reheater 104-1, the second reheater 104-2, condensed steam type draw gas little machine 105, backheat equipment 106 or the like.Wherein, the steam discharge of the high-pressure cylinder 101 of steam turbine is directed to the first reheater 104-1, carry out heat temperature raising, enter the first intermediate pressure cylinder 102-1 of steam turbine then, in the middle of the first intermediate pressure cylinder 102-1 of steam turbine, be provided with an extraction opening, draw steam from this extraction opening, heat-setting water and feedwater, reclaim the latent heat of vaporization, improve efficiency of thermal cycle.Then, the first intermediate pressure cylinder 102-1 steam discharge causes the second reheater 104-2, carry out heat temperature raising, enter the second intermediate pressure cylinder 102-2 then, be provided with an extraction opening in the middle of the intermediate pressure cylinder 102-2, draw steam from this extraction opening, heat-setting water and feedwater, reclaim the latent heat of vaporization, thereby improve efficiency of thermal cycle.But, once with double reheat after the temperature of drawing gas higher, the degree of superheat is big, the energy of superheat section also is used to add hot water with the latent heat of vaporization, influences efficiency of thermal cycle.
The steam turbine power generation unit of the prior art double reheat of Fig. 1 is the single shaft pattern, 1 generator of each steam turbine Driven by Coaxial; The steam turbine power generation unit that the minority double reheat is arranged is twin shaft pattern (referring to Fig. 2), and different steam turbine split axles drive 2 generators, all have the bigger problem of the degree of superheat of drawing gas.
The model utility content
Above-mentioned deficiency at the double reheat thermodynamic system of prior art, the utility model mainly utilizes the steam before the heat again, drive the back pressure type little machine that draws gas, from drawing gas little machine, this back pressure type draws gas, utilize the lower little machine of the degree of superheat to draw gas and steam discharge, come heat-setting water and feedwater by backheat equipment such as heater.Compare with the double reheat thermodynamic system of prior art, the utility model can improve efficiency of thermal cycle.
According to an aspect of the present utility model, a kind of thermodynamic system of double reheat is provided, comprising: high-pressure cylinder, first intermediate pressure cylinder, second intermediate pressure cylinder and low pressure (LP) cylinder, described high-pressure cylinder, first intermediate pressure cylinder, second intermediate pressure cylinder are connected successively with low pressure (LP) cylinder; First reheater is arranged between described high-pressure cylinder and described first intermediate pressure cylinder; Second reheater is arranged between described first intermediate pressure cylinder and described second intermediate pressure cylinder; The first back pressure type little machine that draws gas, from described high-pressure cylinder obtain without described first reheater again the steam of heat to drive the described first back pressure type little machine that draws gas; The second back pressure type little machine that draws gas, from described first intermediate pressure cylinder obtain without described second reheater again the steam of heat to drive the described second back pressure type little machine that draws gas; And at least one backheat equipment, draw gas from described first back pressure type little machine and the described second back pressure type little machine that draws gas that draws gas.
According to a preferred embodiment of the present utility model, in above-mentioned thermodynamic system, described first back pressure type little machine and the described second back pressure type little machine that draws gas that draws gas is connected respectively and drives a driven device.
According to a preferred embodiment of the present utility model, in above-mentioned thermodynamic system, also comprise: the first steam flow balance tube is communicated with described first back pressure type and draws gas the output pipeline of little machine and the transmission pipeline between described first intermediate pressure cylinder and described second intermediate pressure cylinder to stablize the draw gas exhaust steam pressure of little machine of described first back pressure type; The second steam flow balance tube is communicated with described second back pressure type and draws gas the output pipeline of little machine and the transmission pipeline between described second intermediate pressure cylinder and the described low pressure (LP) cylinder to stablize the draw gas exhaust steam pressure of little machine of described second back pressure type.
According to a preferred embodiment of the present utility model, in above-mentioned thermodynamic system, when drawing gas the required steam flow of described backheat equipment that little machine is connected when drawing gas the exhaust steam flow of little machine, replenish steam to described and first back pressure type backheat equipment that little machine is connected that draws gas from described first intermediate pressure cylinder greater than described first back pressure type with first back pressure type; When drawing gas the required steam flow of described backheat equipment that little machine is connected when drawing gas the exhaust steam flow of little machine, replenish steam to described and second back pressure type backheat equipment that little machine is connected that draws gas from described second intermediate pressure cylinder greater than described second back pressure type with second back pressure type.
According to a preferred embodiment of the present utility model, in above-mentioned thermodynamic system, when described and first back pressure type draw gas the required steam flow of backheat equipment that little machine is connected when drawing gas the exhaust steam flow of little machine less than described first back pressure type, draw gas little machine to the described first intermediate pressure cylinder steam discharge overflow from described first back pressure type; When described and second back pressure type draw gas the required steam flow of backheat equipment that little machine is connected when drawing gas the exhaust steam flow of little machine less than described second back pressure type, draw gas little machine to the described second intermediate pressure cylinder steam discharge overflow from described second back pressure type.
According to a preferred embodiment of the present utility model, in above-mentioned thermodynamic system, also comprise: vapour condenser obtains steam and obtains the draw gas steam discharge of little machine of described second back pressure type from described low pressure (LP) cylinder.
According to a preferred embodiment of the present utility model, in above-mentioned thermodynamic system, also comprise: little machine starts exhaust steam pipe, connect described second back pressure type draw gas little machine and described vapour condenser, drawing gas little machine with described second back pressure type the described thermodynamic system start up period can't be to described vapour condenser steam discharge when the described second intermediate pressure cylinder steam discharge.
According to a preferred embodiment of the present utility model, in above-mentioned thermodynamic system, described backheat equipment is heater or oxygen-eliminating device.
Should be appreciated that the above generality of the utility model is described and the following detailed description all is exemplary and explanat, and be intended to provide further explanation for as claimed in claim the utility model.
Description of drawings
Comprise that accompanying drawing is for providing the utility model further to be understood, they are included and are constituted the application's a part, and accompanying drawing shows embodiment of the present utility model, and play the effect of explaining the utility model principle with this specification.In the accompanying drawing:
Fig. 1 shows the thermodynamic system of a kind of double reheat of prior art, and this thermodynamic system has adopted the condensed steam type little machine that draws gas, and backheat equipment adopts the high degree of superheat steam in heat back again.
Fig. 2 shows the thermodynamic system of the another kind of double reheat of prior art.
Fig. 3 shows the schematic structure according to an embodiment's of the present utility model double reheat thermodynamic system, wherein adopts the back pressure type little machine that draws gas.
Fig. 4 shows the schematic structure according to another embodiment's of the present utility model double reheat thermodynamic system.
Fig. 5 shows the schematic structure according to another embodiment's of the present utility model double reheat thermodynamic system.
Fig. 6 shows the schematic structure according to an embodiment's more of the present utility model double reheat thermodynamic system.
Embodiment
Now embodiment of the present utility model will be described with reference to the drawings in detail.Now will be in detail with reference to preferred embodiment of the present utility model, its example is shown in the drawings.In the case of any possible, in institute's drawings attached, will use identical mark to represent same or analogous part.In addition, although employed term is to select from public term in the utility model, but some mentioned terms may be that the claimant selects by his or her judgement in the utility model specification, and its detailed meanings illustrates in the relevant portion of the description of this paper.In addition, require not only by employed actual terms, but also will understand the utility model by the meaning that each term contained.
The brief description of term
Little machine: small turbine is the auxiliary turbine in the main steam turbine thermodynamic system.
Heat again: the steam of having done the part merit in the steam turbine drawn once more heat, draw the back-steam turbine then and continue acting.This mode is called heat again.By reasonably hot again, can reduce exhaust steam moisture, improve efficiency of thermal cycle.
Condensed steam type: steam discharge is called condensed steam type to the steam turbine of subatmospheric vacuum vapour condenser.
Back pressure type: steam discharge is called back pressure type to the steam turbine that is higher than atmospheric piping or heat exchanger.
Draw gas: the intergrade before turbine discharge is extracted steam out.
The application's model utility people finds: the best degree of superheat of drawing gas is lower, with the acting of superheat section energy, and latent heat of vaporization portion of energy is used for backheat.But, to the thermal power plant that re-heating subsystem is arranged of prior art, again after the heat draw gas be subjected to reheating effect, temperature improves, the degree of superheat increases thereupon, makes the energy that can be used to do work be used for heat-setting water and feedwater, has influenced the efficient of thermodynamic cycle.Therefore, the utility model is at the above-mentioned situation of existing double reheat thermodynamic system, utilize the preceding steam of heat again, drive the back pressure little machine that draws gas, from little machine, draw gas, utilize the lower little machine of the degree of superheat to draw gas and steam discharge, come heat-setting water and feedwater by heater, compare with existing thermodynamic system, can improve efficiency of thermal cycle.
First embodiment
Fig. 3 shows the schematic structure of the double reheat thermodynamic system of a preferred embodiment of the present utility model.As shown in Figure 3, double reheat thermodynamic system of the present utility model mainly comprises: high-pressure cylinder 301, the first intermediate pressure cylinder 302-1, the second intermediate pressure cylinder 302-2, low pressure (LP) cylinder 303, the first reheater 304-1, the second reheater 304-2, first back pressure type draw gas little machine 305-1, second back pressure type draw gas little machine 305-2, a plurality of backheat equipment 306.
Among the figure, high-pressure cylinder 301, the first intermediate pressure cylinder 302-1, the second intermediate pressure cylinder 302-2 are connected successively with low pressure (LP) cylinder 303.Main steam is by high-pressure cylinder 301, through be arranged between the high-pressure cylinder 301 and the first intermediate pressure cylinder 302-1 the first reheater 304-1 again the steam after the heat be passed to the first intermediate pressure cylinder 302-1, then through be arranged between the first intermediate pressure cylinder 302-1 and the second intermediate pressure cylinder 302-2 the second reheater 304-2 again the steam after the heat be delivered to this second intermediate pressure cylinder 302-2 and low pressure (LP) cylinder 303 successively.
According to the utility model, the first back pressure type little machine 305-1 that draws gas is configured to obtain the steam of heat again without the first reheater 304-1 from high-pressure cylinder 301, and this steam is used to drive this first back pressure type little machine 305 that draws gas.In addition, the second back pressure type little machine 305-2 that draws gas is configured to obtain the steam of heat again without the second reheater 304-2 from the first intermediate pressure cylinder 302-1, and this steam is used to drive this second back pressure type little machine 305-2 that draws gas.In the running of this thermodynamic system, steam, for example low-temperature primary reheated steam, turbine high-pressure level is drawn gas, boiler once in the middle of vapour source such as heating steam, enter this first back pressure little machine 305-1 that draws gas by the draw gas admission piping of little machine 305-1 of first back pressure type, steam drives this first back pressure little machine 305-1 that draws gas and rotates.As shown in the figure, this first back pressure type little machine that draws gas can drive the first driven device 309-1, for example equipment such as feed water pump, blower fan, generator, compressor.Then, from this first back pressure type draws gas little machine, extract steam by extraction steam pipeline again and give two backheat equipment 306 shown in Fig. 3.In addition, the draw gas steam discharge of little machine of first back pressure type enters those backheat equipment 306 by exhaust steam pipeline, and the heat of steam discharge and working-medium water are recovered in the circulation system by backheat equipment 306.For example, backheat equipment 306 of the present utility model can be heater or oxygen-eliminating device.In addition, the first and second back pressure types of the present utility model little machine that draws gas also can be guided to its steam discharge other regenerator, Auxiliary Steam or heat supply network.
In addition, in the running of this thermodynamic system, steam, for example press vapour sources such as certain level is drawn gas, the middle heating steam of boiler secondary in low temperature double reheat steam, the steam turbine, enter this second back pressure little machine 305-2 that draws gas by the draw gas admission piping of little machine 305-2 of second back pressure type, steam drives this second back pressure little machine 305-2 that draws gas and rotates.As shown in the figure, this second back pressure type little machine that draws gas can drive the second driven device 309-2, for example equipment such as feed water pump, blower fan, generator, compressor.Then, from this second back pressure type draws gas little machine, extract steam by extraction steam pipeline again and give two the backheat equipment 306 in addition shown in Fig. 3.In addition, the draw gas steam discharge of little machine of second back pressure type enters those backheat equipment 306 by exhaust steam pipeline, and the heat of steam discharge and working-medium water are recovered in the circulation system by backheat equipment 306.
According on the other hand of the present utility model, above-mentioned thermodynamic system can also comprise one first steam flow balance tube 307-1 and one second steam flow balance tube 307-2.This first steam flow balance tube 307-1 is communicated with first back pressure type draw gas output pipeline of little machine 305-1 and the transmission pipeline between the first intermediate pressure cylinder 302-1 and the second intermediate pressure cylinder 302-2, in order to stablize first back pressure type draw gas exhaust steam flow of little machine 305-1 of the exhaust steam pressure of little machine 305-1 and balance backheat equipment 306 required steam flows and first back pressure type that draws gas.This second steam flow balance tube 307-2 is communicated with second back pressure type draw gas output pipeline of little machine 305-2 and the transmission pipeline between the second intermediate pressure cylinder 302-2 and the low pressure (LP) cylinder 303, in order to stablize second back pressure type draw gas exhaust steam flow of little machine 305-2 of the exhaust steam pressure of little machine 305-2 and balance backheat equipment 306 required steam flows and second back pressure type that draws gas.For example, when drawing gas the required steam flow of backheat equipment that little machine is connected 306 when drawing gas the exhaust steam flow of little machine 305-1, replenish steam to above-mentioned backheat equipment 306 from the first intermediate pressure cylinder 302-1 greater than first back pressure type with first back pressure type; And, draw gas little machine 305-1 to the first intermediate pressure cylinder 302-1 steam discharge overflow from first back pressure type when drawing gas the required steam flow of backheat equipment that little machine is connected 306 when drawing gas the exhaust steam flow of little machine 305-1 less than first back pressure type with first back pressure type.When drawing gas the required steam flow of backheat equipment that little machine is connected 306 when drawing gas the exhaust steam flow of little machine 305-2, replenish steam to above-mentioned backheat equipment 306 from the second intermediate pressure cylinder 302-2 greater than second back pressure type with second back pressure type; And, draw gas little machine 305-2 to the second intermediate pressure cylinder 302-2 steam discharge overflow from second back pressure type when drawing gas the required steam flow of backheat equipment that little machine is connected 306 when drawing gas the exhaust steam flow of little machine 305-2 less than second back pressure type with second back pressure type.
In addition, in the embodiment shown in fig. 3, thermodynamic system also comprises a vapour condenser 310.As shown in the figure, this vapour condenser 310 can obtain steam from low pressure (LP) cylinder 303, also can obtain the draw gas steam discharge of little machine 305-2 of second back pressure type.
Particularly, this vapour condenser 310 draws gas with back pressure type and is connected via a little machine startup exhaust steam pipe 308 between the little machine 305-2.This little machine startup exhaust steam pipe 308 can draw gas little machine 305-2 at start up period second back pressure type of thermodynamic system can't be to vapour condenser 310 steam discharges when the second intermediate pressure cylinder 302-2 steam discharge.In addition, according to other embodiment of the present utility model, this little machine starts exhaust steam pipe 308 also can cause development unit or direct row to atmosphere.
In addition, the technological scheme of the utility model Fig. 3 and Fig. 5 is corresponding with the routine techniques scheme of Fig. 1.Wherein, the steam turbine power generation unit is the single shaft pattern, generator of each steam turbine Driven by Coaxial.Backheat equipment can be single-row 1 100% capacity heater among the figure, and this heater also can adopt 2 50% capacity patterns of biserial certainly.
Second embodiment
Fig. 4 shows another preferred embodiment of the present utility model.Particularly, the part that embodiment shown in Figure 4 is identical with Fig. 3 can directly be continued to use the description among above first embodiment, repeats no more herein.In addition, unless special explanation is arranged in specification, the drawing reference numeral among Fig. 4 continue to use with Fig. 3 in identical order.For example, the label among the label among Fig. 4 401 and Fig. 3 301 indicates identical device or equipment.Among the figure, backheat equipment can be single-row 100% capacity heater, and this heater also can adopt biserial 50% capacity pattern.
Different with Fig. 3 is that embodiment's shown in Figure 4 steam turbine power generation unit is the twin shaft pattern, the different driving of steam turbine split axles 2 generators, i.e. generator among Fig. 41 and generators 2; And in the embodiment shown in fig. 3, the steam turbine power generation unit is the single shaft pattern, generator of each steam turbine Driven by Coaxial.
The 3rd embodiment
Fig. 5 shows another preferred embodiment of the present utility model.Particularly, the part that embodiment shown in Figure 5 is identical with Fig. 3 can directly be continued to use the description among above first embodiment, repeats no more herein.In addition, unless special explanation is arranged in specification, the drawing reference numeral among Fig. 5 continue to use with Fig. 3 in identical order.For example, the label among the label among Fig. 5 501 and Fig. 3 301 indicates identical device or equipment.
Different with Fig. 3 is, 2 grades of back pressure types of embodiment shown in Figure 5 the draw gas same equipment of little machine Driven by Coaxial, i.e. driven device 509-2 among Fig. 5; And in the embodiment shown in fig. 3,2 grades of back pressure types drive different equipment, i.e. driven device 309-1 and 309-2 among Fig. 3 with drawing gas little machine disalignment.
The 4th embodiment
Fig. 6 shows another preferred embodiment of the present utility model.Particularly, the part that embodiment shown in Figure 6 is identical with Fig. 3 can directly be continued to use the description among above first embodiment, repeats no more herein.In addition, unless special explanation is arranged in specification, the drawing reference numeral among Fig. 6 continue to use with Fig. 3 in identical order.For example, the label among the label among Fig. 6 601 and Fig. 3 301 indicates identical device or equipment.
In fact, as shown in the figure, embodiment shown in Figure 6 combines above Fig. 4 and the second and the 3rd embodiment shown in Figure 5 difference with respect to first embodiment shown in Figure 3.
At last, in above-mentioned each embodiment, can to once, double reheat all establishes the back pressure type little machine that draws gas, also can be only to wherein any again heat the back pressure type little machine that draws gas is set.
To sum up, the utility model is at the above-mentioned deficiency of prior art, main utilize again steam before the heat to drive the back pressure little machine that draws gas, from little machine, draw gas, utilize the lower little machine of the degree of superheat to draw gas and steam discharge, come heat-setting water and feedwater by heater, compare, can improve efficiency of thermal cycle with existing double reheat thermodynamic system.Simultaneously, the utility model has significantly reduced the steam flow that enters reheater, can reduce the heat exchange area of reheater, reduces the flow area in reheating pipe road, thereby significantly reduces the cost of re-heating subsystem.
For example, to 1 1000MW, 600 ℃ double reheat ultra supercritical generator set, adopt the utility model back pressure little machine thermodynamic system of drawing gas, compare with the conventional main steam turbine thermodynamic system of drawing gas, the thermodynamic system investment reduces about 1.5 hundred million, simultaneously efficiency of thermal cycle can improve approximately 0.4%, is equivalent to can economize on coal every year about 4000 tons, has good returns of investment.
In addition, can also be furnished with little machine exhaust steam flow balance piping in the technical solution of the utility model.This can stablize little machine exhaust steam pressure, required steam flow of balance backheat equipment and little machine exhaust steam flow.When the required steam flow of backheat equipment during, replenish steam to backheat equipment from main steam turbine intermediate pressure cylinder steam discharge greater than little machine exhaust steam flow; When the required steam flow of backheat equipment during less than little machine exhaust steam flow, from little machine steam discharge to the overflow of main steam turbine intermediate pressure cylinder steam discharge.Can improve flexible operation and reliability.
In addition, can also be furnished with little machine in the technical solution of the utility model and start exhaust steam pipeline, can not when main steam turbine intermediate pressure cylinder exhaust steam pipeline discharges, can drain into vapour condenser, development unit or atmosphere when little machine steam discharge in the unit starting stage.Can satisfy the unit starting requirement.
In the technical solution of the utility model, the back pressure little machine that draws gas can be used for driving feed water pump group in the conventional scheme, also can keep the little machine of conventional condensed steam type and drive the feed water pump group, drives equipment such as other pump, blower fan, generator, compressor with the back pressure little machine that draws gas.Can satisfy the different configuration requirements of different power plant.
Those skilled in the art can be obvious, can carry out various modifications and variations and not depart from spirit and scope of the present utility model above-mentioned exemplary embodiment of the present utility model.Therefore, be intended to make the utility model to cover to drop in appended claims and the equivalence techniques scheme scope thereof to modification of the present utility model and modification.
Claims (8)
1. the thermodynamic system of a double reheat comprises:
High-pressure cylinder, first intermediate pressure cylinder, second intermediate pressure cylinder and low pressure (LP) cylinder, described high-pressure cylinder, first intermediate pressure cylinder, second intermediate pressure cylinder are connected successively with low pressure (LP) cylinder;
First reheater is arranged between described high-pressure cylinder and described first intermediate pressure cylinder;
Second reheater is arranged between described first intermediate pressure cylinder and described second intermediate pressure cylinder;
The first back pressure type little machine that draws gas, from described high-pressure cylinder obtain without described first reheater again the steam of heat to drive the described first back pressure type little machine that draws gas;
The second back pressure type little machine that draws gas, from described first intermediate pressure cylinder obtain without described second reheater again the steam of heat to drive the described second back pressure type little machine that draws gas; And
At least one backheat equipment draws gas from described first back pressure type little machine and the described second back pressure type little machine that draws gas that draws gas.
2. thermodynamic system as claimed in claim 1 is characterized in that, described first back pressure type little machine and the described second back pressure type little machine that draws gas that draws gas is connected respectively and drives a driven device.
3. thermodynamic system as claimed in claim 1 is characterized in that, also comprises:
The first steam flow balance tube is communicated with described first back pressure type and draws gas the output pipeline of little machine and the transmission pipeline between described first intermediate pressure cylinder and described second intermediate pressure cylinder to stablize the draw gas exhaust steam pressure of little machine of described first back pressure type;
The second steam flow balance tube is communicated with described second back pressure type and draws gas the output pipeline of little machine and the transmission pipeline between described second intermediate pressure cylinder and the described low pressure (LP) cylinder to stablize the draw gas exhaust steam pressure of little machine of described second back pressure type.
4. thermodynamic system as claimed in claim 3 is characterized in that,
When drawing gas the required steam flow of described backheat equipment that little machine is connected when drawing gas the exhaust steam flow of little machine, replenish steam to described and first back pressure type backheat equipment that little machine is connected that draws gas from described first intermediate pressure cylinder greater than described first back pressure type with first back pressure type;
When drawing gas the required steam flow of described backheat equipment that little machine is connected when drawing gas the exhaust steam flow of little machine, replenish steam to described and second back pressure type backheat equipment that little machine is connected that draws gas from described second intermediate pressure cylinder greater than described second back pressure type with second back pressure type.
5. thermodynamic system as claimed in claim 3 is characterized in that,
When described and first back pressure type draw gas the required steam flow of backheat equipment that little machine is connected when drawing gas the exhaust steam flow of little machine less than described first back pressure type, draw gas little machine to the described first intermediate pressure cylinder steam discharge overflow from described first back pressure type;
When described and second back pressure type draw gas the required steam flow of backheat equipment that little machine is connected when drawing gas the exhaust steam flow of little machine less than described second back pressure type, draw gas little machine to the described second intermediate pressure cylinder steam discharge overflow from described second back pressure type.
6. thermodynamic system as claimed in claim 1 is characterized in that, also comprises:
Vapour condenser obtains steam and obtains the draw gas steam discharge of little machine of described second back pressure type from described low pressure (LP) cylinder.
7. thermodynamic system as claimed in claim 6 is characterized in that, also comprises:
Little machine starts exhaust steam pipe, connects described second back pressure type draw gas little machine and described vapour condenser, and drawing gas little machine with described second back pressure type the described thermodynamic system start up period can't be to described vapour condenser steam discharge when the described second intermediate pressure cylinder steam discharge.
8. thermodynamic system as claimed in claim 1 is characterized in that, described backheat equipment is heater or oxygen-eliminating device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120073892XU CN201972746U (en) | 2011-03-18 | 2011-03-18 | Double reheating thermal system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201120073892XU CN201972746U (en) | 2011-03-18 | 2011-03-18 | Double reheating thermal system |
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| CN201972746U true CN201972746U (en) | 2011-09-14 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102678207A (en) * | 2011-03-18 | 2012-09-19 | 中国电力工程顾问集团华东电力设计院 | Thermodynamic system with twice reheating |
| CN104481618A (en) * | 2014-11-14 | 2015-04-01 | 东方电气集团东方汽轮机有限公司 | High-parameter ultra-supercritical steam turbine generator unit |
| CN105822373A (en) * | 2015-01-08 | 2016-08-03 | 国电浙江北仑第发电有限公司 | Pressure-boosting main machine coaxial driving water feeding pump system comprising backpressure steam extraction small steam turbine |
| CN106437875A (en) * | 2016-09-13 | 2017-02-22 | 上海电力学院 | Thermal power generating unit working medium shunting circulation peak shaving system |
| CN112412553A (en) * | 2020-11-17 | 2021-02-26 | 西安热工研究院有限公司 | Multistage flexible heat supply system for two back pressing machines and control method |
-
2011
- 2011-03-18 CN CN201120073892XU patent/CN201972746U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102678207A (en) * | 2011-03-18 | 2012-09-19 | 中国电力工程顾问集团华东电力设计院 | Thermodynamic system with twice reheating |
| CN104481618A (en) * | 2014-11-14 | 2015-04-01 | 东方电气集团东方汽轮机有限公司 | High-parameter ultra-supercritical steam turbine generator unit |
| CN104481618B (en) * | 2014-11-14 | 2017-02-01 | 东方电气集团东方汽轮机有限公司 | High-parameter ultra-supercritical steam turbine generator unit |
| CN105822373A (en) * | 2015-01-08 | 2016-08-03 | 国电浙江北仑第发电有限公司 | Pressure-boosting main machine coaxial driving water feeding pump system comprising backpressure steam extraction small steam turbine |
| CN106437875A (en) * | 2016-09-13 | 2017-02-22 | 上海电力学院 | Thermal power generating unit working medium shunting circulation peak shaving system |
| CN106437875B (en) * | 2016-09-13 | 2018-06-29 | 上海电力学院 | Fired power generating unit working medium bypassing circulation peak regulation system |
| CN112412553A (en) * | 2020-11-17 | 2021-02-26 | 西安热工研究院有限公司 | Multistage flexible heat supply system for two back pressing machines and control method |
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