CN113266554A - Condenser preposed supercharging system capable of improving power generation efficiency of steam turbine of thermal power plant - Google Patents
Condenser preposed supercharging system capable of improving power generation efficiency of steam turbine of thermal power plant Download PDFInfo
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- CN113266554A CN113266554A CN202010095709.XA CN202010095709A CN113266554A CN 113266554 A CN113266554 A CN 113266554A CN 202010095709 A CN202010095709 A CN 202010095709A CN 113266554 A CN113266554 A CN 113266554A
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- 238000010248 power generation Methods 0.000 title abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 49
- 239000002699 waste material Substances 0.000 claims abstract 3
- 238000005086 pumping Methods 0.000 claims description 34
- 230000007246 mechanism Effects 0.000 claims description 26
- 238000001816 cooling Methods 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 10
- 230000005012 migration Effects 0.000 claims description 8
- 238000013508 migration Methods 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 239000000498 cooling water Substances 0.000 claims description 5
- 230000001737 promoting effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 8
- 239000003245 coal Substances 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B41/00—Pumping installations or systems specially adapted for elastic fluids
- F04B41/06—Combinations of two or more pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K9/00—Plants characterised by condensers arranged or modified to co-operate with the engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
- F04B37/10—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use
- F04B37/14—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use to obtain high vacuum
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/06—Cooling; Heating; Prevention of freezing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention provides a condenser pre-pressurization system capable of improving the power generation efficiency of a steam turbine of a thermal power plant, which is used for the steam turbine of the thermal power plant, wherein the steam turbine takes steam as power and converts the heat energy of the steam into mechanical work so as to drive a generator of the thermal power plant. After the pressurized steam passes through the steam turbine and drives the steam turbine, the steam forms dead steam and is discharged outwards through the exhaust end of the steam turbine; the condenser pre-pressurization system comprises a pressurization pump system, a condenser pre-pressurization system and a condenser pre-pressurization system, wherein the pressurization pump system comprises an inlet end, an outlet end and at least one pressurization pump; the inlet end is connected with the exhaust end of the steam turbine; the dead steam exhausted from the exhaust end of the steam turbine is input into the at least one booster pump from the inlet end for boosting and then output from the outlet end; the outlet end of the booster pump system is connected to a condenser; the condenser is used for condensing the waste steam from the booster pump system after being boosted into water.
Description
Technical Field
The invention relates to a pressurization system for a steam turbine of a thermal power plant, in particular to a condenser preposed pressurization system capable of improving the power generation efficiency of the steam turbine of the thermal power plant.
Background
In a thermal power plant, a steam turbine is a main core device for generating electricity, and the steam turbine generates electricity by utilizing the characteristic that the steam turbine can convert the heat energy of steam into mechanical work. Generally, a condenser is arranged on the exhaust side of the steam turbine, and can condense the exhaust steam of the steam turbine into water for reuse by a boiler, and vacuum can be formed and maintained at the exhaust steam position of the steam turbine. The steam turbine is connected with the condenser through a pipeline. The vacuum of the condenser can directly influence the efficiency of the generator, and the reason is that pressurized steam passes through the steam turbine and pushes the steam turbine to rotate, then the steam turbine loses power to form exhaust steam, and the backpressure (vacuum) generated by the condenser directly influences the exhaust steam removal speed and the work efficiency of the steam turbine, so that the power generation efficiency of the steam turbine is directly influenced.
At present, exhaust steam of a steam turbine of a thermal power plant is generally input to a condenser in a pressure difference natural migration manner, and in order to improve the power generation efficiency of the steam turbine, a commonly used manner is to try to reduce a back pressure value of the condenser, so that the pressure difference between the steam turbine and the condenser is maximized, thereby accelerating the migration of the steam and improving the power generation efficiency of the steam turbine. For some large power generating units, the coal consumption per degree of electricity may be reduced by 3 grams per 1KPa of vacuum increase over a range.
However, since the condensers of the thermal power plants basically use water as a condensing medium, and the medium needs to be cooled by a naturally obtained cold source (water or air in rivers, lakes, and seas), the water temperature in the condenser is affected by the natural air temperature and the water temperature due to seasonal changes, and it is known that the saturated vapor pressure of water is related to the temperature, so that the thermal power plants cannot always keep the vacuum degree of the condenser near the optimal vacuum degree required by the design of the generator. That is, the working vacuum degree of the generator is not close to the optimal vacuum degree which is most beneficial to improving the coal burning efficiency most of the time in one year.
The back end of a condenser commonly used in a thermal power plant is generally provided with a vacuum pumping system, most of the vacuum pumping system is a large water ring pump or other systems, and a few of the vacuum pumping systems also remain a steam ejector system or a water jet pump exhaust system. After the condenser is vacuumized (the time is short and is usually not more than 2 hours), the vacuumizing system is only used for maintaining the vacuum degree of the condenser, namely, the non-condensable gas in the condenser is continuously pumped away in the continuous operation, and the air pumping quantity of the vacuum pumps is increased, so that the vacuum degree is prevented from being reduced due to the fact that the non-condensable gas enters water. But to improve the vacuum and reduce the backpressure value, because the factor influence of super large water and its low pressure evaporation characteristics with higher speed, increase the air extraction capacity of vacuum pump group, often less to the improvement effect of condenser vacuum.
Therefore, the present invention is to provide a new pre-condenser supercharging system capable of improving the power generation efficiency of the steam turbine of the thermal power plant, so as to solve the above-mentioned drawbacks in the prior art.
Disclosure of Invention
Therefore, the present invention is directed to solve the above problems in the prior art, and the present invention provides a pre-condenser supercharging system capable of improving the power generation efficiency of a steam turbine in a thermal power plant, in which a supercharging pump system is added between the steam turbine and a rear condenser, and a mechanical air pumping mechanism of the supercharging pump system is applied, so that the natural exhaust mode of the exhaust steam in the original steam turbine can be changed into forced exhaust, and the exhaust speed of the exhaust steam of the steam turbine can be increased, which is equivalent to reducing the backpressure of the condenser, thereby improving the power generation efficiency of the steam turbine, saving the unit coal consumption required by the power generation of the steam turbine, achieving the purpose of improving the power generation efficiency of the steam turbine in the power plant, and enabling the power generation efficiency of the power plant to be free from the influence of the environmental temperature, the vacuum leakage and the size of the vacuum pump, so that the power generator is in an optimized state free from the influence of the natural environmental temperature. Each booster pump in the booster pump system can form a structure of series connection, parallel connection or a plurality of groups of structures of series connection and then parallel connection according to requirements, and the migration speed of the dead steam can be maximized. The invention provides a condenser pre-pressurization system capable of improving the power generation efficiency of a steam turbine of a thermal power plant, which is a steam turbine used in the thermal power plant, wherein the steam turbine takes steam as power and converts the heat energy of the steam into mechanical work for driving a generator of the thermal power plant; the steam turbine is provided with an exhaust end, and after pressurized steam passes through the steam turbine and drives the steam turbine, the steam loses power to form dead steam, and the dead steam is exhausted outwards through the exhaust end; the condenser pre-pressurization system comprises a pressurization pump system, a condenser pre-pressurization system and a condenser pre-pressurization system, wherein the pressurization pump system comprises an inlet end, an outlet end and at least one pressurization pump; the inlet end of the booster pump system is connected with the exhaust end of the steam turbine through an input pipeline; each booster pump comprises an air inlet end and an air outlet end; the exhausted steam exhausted from the exhaust end of the steam turbine is input into the at least one booster pump from the inlet end for boosting and then output from the outlet end; the condenser comprises an input end, and the outlet end of the booster pump system is connected with the input end of the condenser through an output pipeline; the condenser receives the pressurized exhaust steam from the booster pump system and condenses the pressurized exhaust steam into water.
Furthermore, the at least one booster pump is a plurality of booster pumps, and the plurality of booster pumps are connected in parallel.
Furthermore, the at least one booster pump is a plurality of booster pumps which are connected in series to increase the pressure difference; wherein the corresponding air inlet end and the exhaust end of two adjacent booster pumps are mutually connected through a conveying pipeline.
Further, the booster pump is selected from a roots vacuum pump, a centrifugal pump, a turbine, a jet pump, or a gas moving power plant having a large pumping amount or a gas pump that can promote the migration speed of gas.
Furthermore, a valve is installed at the air inlet end of each booster pump and used for closing the corresponding booster pump when needed so as to enable the corresponding booster pump to be separated from the operation of the whole booster pump system.
Further, the condenser is a water-cooling condenser or an air-cooling condenser.
Further, still include a vacuum pumping system, wherein this condenser still includes an output and is connected with this vacuum pumping system, and this vacuum pumping system is arranged in extracting the non-condensable gas in this condenser for the inside vacuum that forms of this condenser.
Further, the vacuum-pumping system comprises a steam-water separator, wherein the vacuum-pumping system is connected with the steam-water separator, and the steam-water separator is used for separating a steam-water mixture output by the vacuum-pumping system into air and liquid water.
Furthermore, still a steam-water separator, wherein this condenser still includes an output and is connected with this steam-water separator, and this steam-water separator is used for separating into air and liquid water with the steam-water mixture that this condenser output.
Furthermore, the booster pump is connected with a driving motor, the driving motor is connected with a control mechanism, and the driving motor is controlled by the control mechanism to drive the booster pump; each booster pump is also connected with a cooling mechanism which is used for inputting cooling water into the booster pump for cooling, wherein the control mechanism controls the driving motor in a frequency conversion mode and regulates and controls the performance of the booster pump according to the frequency conversion characteristic.
Furthermore, each booster pump is also provided with a pressure sensor and a temperature sensor; the pressure sensor and the temperature sensor are connected with the control mechanism; the pressure value and the temperature value detected by the pressure sensor and the temperature sensor are transmitted to the control mechanism to control the driving motor and the cooling mechanism so as to protect the booster pump to stably operate.
The invention has the beneficial effects that:
the invention is the biggest difference with the vacuum system composed of the power plant system in the prior art and the prior reconstruction technology, and is characterized in that a booster pump system is directly arranged between a steam turbine and a condenser, but not a mode of improving the vacuum of the condenser to indirectly improve the power generation efficiency of the steam turbine is applied in the market, so the structure of the invention can effectively avoid the characteristic that the condenser is influenced by the temperature and the leakage rate of cooling water, can more directly and efficiently ensure that the vacuum degree of the system is not influenced by seasons, and is always stabilized in the interval with the highest power generation efficiency of the steam turbine.
A further understanding of the nature and advantages of the present invention will become apparent from the following description when read in conjunction with the accompanying drawings.
Drawings
FIG. 1 is a schematic view showing the combination of elements of the present invention;
FIG. 2 is a schematic view of an assembly of components of a plurality of booster pumps according to the present invention in series;
FIG. 3 is a schematic diagram showing a combination of components of a plurality of booster pumps of the present invention in series with a vacuum pumping system connected to a steam-water separator;
FIG. 4 is a schematic diagram showing a combination of elements of the present invention in which a plurality of booster pumps are connected in series, wherein a condenser is connected to a steam-water separator;
FIG. 5 is a schematic diagram of an assembly of components of the present invention showing a plurality of booster pumps connected in parallel;
FIG. 6 is a schematic diagram showing a combination of components of the multiple booster pumps of the present invention in parallel, wherein the vacuum pumping system is connected to a steam-water separator;
FIG. 7 is a schematic diagram showing a combination of elements in which a condenser is connected to a steam-water separator, in which a plurality of booster pumps according to the present invention are connected in parallel;
FIG. 8 is a schematic diagram of the combination of components showing the configuration of multiple booster pumps of the present invention forming multiple sets of booster pumps connected in parallel;
FIG. 9 is a block diagram of the booster pump and related electrical components and detection control circuit according to the present invention.
Description of the reference numerals
1 steam turbine 33 valve
2 input end of conveying pipeline 41
3 output end of 42 booster pump
4 condenser 51 inlet end
5 outlet end of booster pump system 52
6 vacuum pumping system 71 loop liquid heat exchanger
7 steam-water separator 81 driving motor
11 exhaust end 82 control mechanism
21 input pipe 91 cooling mechanism
22 output line 92 pressure sensor
31 air inlet end 93 temperature sensor
32 exhaust end.
Detailed Description
With attention now to the structural elements, functions and advantages of the present invention, there is shown in the drawings and described in detail a preferred embodiment of the invention.
Referring to fig. 1 to 9, a condenser pre-pressurization system for improving the power generation efficiency of a steam turbine of a thermal power plant according to the present invention is shown, which includes the following components:
a steam turbine 1 has an exhaust end 11, and after the pressurized steam passes through the steam turbine 1 and drives the steam turbine 1, the steam will lose power to form dead steam, and the dead steam is discharged outwards through the exhaust end 11. The steam turbine 1 is generally a steam turbine for power generation in a thermal power plant. The steam turbine 1 uses steam as power and converts the heat energy of the steam into mechanical work for driving a generator of a thermal power plant.
A booster pump system 5 includes an inlet port 51, an outlet port 52, and at least one booster pump 3. The inlet end 51 of the booster pump system 5 is connected to the exhaust end 11 of the steam turbine 1 via an inlet line 21. Wherein each booster pump 3 comprises an inlet end 31 and an outlet end 32. The exhaust steam exhausted from the exhaust end 11 of the steam turbine 1 is input into the at least one booster pump 3 from the inlet end 51 for boosting and then output from the outlet end 52. The booster pump 3 is a roots vacuum pump, a centrifugal pump, a turbine, an ejector pump, or a gas pump capable of promoting gas migration speed such as a gas mobile power device with a large pumping amount. Therefore, the exhaust steam output by the steam turbine 1 is extracted by the mechanical mode of the at least one booster pump 3, and the purpose of forced exhaust can be achieved.
As shown in fig. 1, the at least one booster pump 3 may be a single booster pump 3.
The at least one booster pump 3 may also be a plurality of booster pumps 3, wherein the plurality of booster pumps 3 may be connected in series or in parallel. As shown in fig. 2, the plurality of booster pumps 3 are formed in a serial configuration to increase the pressure difference. The inlet end 31 and the exhaust end 32 of two adjacent booster pumps 3 are connected to each other through the delivery pipe 2, so as to share the total pressure increase or pressure drop in the booster pump system 5 to the booster pumps 3 at different stages, thereby sharing the heat generated by the compressed air, maintaining the stable operation of each booster pump 3, and avoiding the blockage due to overheating.
As shown in fig. 5, the plurality of booster pumps 3 are formed in a parallel configuration in which the gas inlet ends 31 of all the booster pumps 3 are connected in parallel to the input line 21 and the gas outlet ends 32 of all the booster pumps 3 are connected in parallel to the output line 22, so as to increase the total amount of pumping of the booster pump system 5.
As shown in fig. 8, the plurality of booster pumps 3 may also form a plurality of groups of booster pumps 3 connected in parallel, corresponding gas inlet ends 31 and gas outlet ends 32 of two adjacent booster pumps 3 in each group are connected in series through the delivery pipe 2, the input pipe 21 is connected in parallel to the corresponding gas inlet ends 31 of the plurality of groups of booster pumps 3, and the output pipe 22 is connected in parallel to the corresponding gas outlet ends 32 of the plurality of groups of booster pumps 3, so as to maximize the exhaust steam migration speed.
A condenser 4 comprises an input 41 and the outlet 52 of the booster pump system 5 is connected to the input 41 of the condenser 4 via an outlet line 22. The condenser 4 is used for receiving the pressurized exhaust steam from the booster pump system 5 and condensing the pressurized exhaust steam into water. The condenser 4 may be a water-cooled condenser, an air-cooled condenser, or other type of condenser, etc.
The invention can also comprise a vacuum-pumping system 6, wherein the condenser 4 further comprises an output end 42 connected with the vacuum-pumping system 6, and the vacuum-pumping system 6 is used for pumping the non-condensable gas in the condenser 4, so that the inside of the condenser 4 is vacuumized.
As shown in fig. 3, 4, 6, 7 and 8, the present invention may further include a steam-water separator 7, which is connectable to the vacuum-pumping system 6, wherein the steam-water separator 7 is configured to separate the steam-water mixture output from the vacuum-pumping system 6 into air and liquid water, and the liquid water is input into the steam-water separator 7, and forms working water with a suitable water temperature through a loop-liquid heat exchanger 71 and is input back to the vacuum-pumping system 6 to serve as working loop liquid required by the operation of the vacuum-pumping system 6.
As shown in fig. 4 and 7, in the present invention, the steam-water separator 7 may be directly connected to the output end 42 of the condenser 4 without providing the vacuum pumping system 6, and the steam-water mixture output from the condenser 4 may be separated into air and liquid water by the steam-water separator 7.
Wherein a valve 33 is installed at the gas inlet end 31 of each booster pump 3 for shutting down the corresponding booster pump 3 when necessary, so as to separate the operation of the whole booster pump system 5, thereby improving the reliability and operability of the booster pump system 5.
Each booster pump 3 forms a channel (not shown in the figure), so even if a certain booster pump 3 is stopped, the exhaust steam can still pass through the unused certain booster pump 3, and therefore, the steam turbine 1 cannot be used, and the potential safety hazard to the original system cannot be caused.
Fig. 9 shows a block diagram of electromechanical components of each booster pump 3, which is mainly used for displaying related electrical components and detection control circuits.
The booster pump 3 is connected to a driving motor 81, the driving motor 81 is connected to a control mechanism 82, and the driving motor 81 is controlled by the control mechanism 82 to drive the booster pump 3. The control mechanism 82 can control the driving motor 81 in a frequency conversion manner, and regulate and control the performance of the booster pump 3 according to the frequency conversion characteristic. The variable frequency starting can maintain the safe and stable operation of the booster pump 3. The low-frequency operation can save energy deeply, and the high-frequency operation can fully exert the supercharging performance of the booster pump 3. The operating speed of the booster pump system 5 is adjusted by applying variable frequency, the boosting degree can be improved or reduced, and the vacuum degree of the system is adjusted in a larger range, so that the annual vacuum degree of the system is under the optimal vacuum condition required by the generator, thereby avoiding the influence of climate, season and weather on the generator and improving the annual working efficiency of the generator.
Wherein each booster pump 3 is further connected with a cooling mechanism 91, and the cooling mechanism 91 is used for inputting cooling water to the booster pump 3 for cooling.
Each booster pump 3 is further provided with a pressure sensor 92 and a temperature sensor 93, the pressure sensor 92 is used for detecting the pipeline pressure of the booster pump 3, and the temperature sensor 93 is used for detecting the temperature of the booster pump 3. The pressure sensor 92 and the temperature sensor 93 are connected to the control mechanism 82. The pressure and temperature values detected by the pressure sensor 92 and the temperature sensor 93 are transmitted to the control mechanism 82 to control the driving motor 81 and the cooling mechanism 91, so as to protect the booster pump 3 from stable operation.
The booster pump system 5 of the present invention may be supported by a mounting bracket (not shown), which is well known in the art and will not be described in detail.
The invention has the advantages that the booster pump system is added between the steam turbine and the condenser at the rear end, and the mechanical air pumping mechanism of the booster pump system is applied, so that the natural exhaust mode of the exhaust steam in the original steam turbine can be changed into forced exhaust, the exhaust speed of the exhaust steam of the steam turbine can be increased, the back pressure of the condenser is reduced, the power generation efficiency of the steam turbine is improved, the unit coal consumption required by the power generation of the steam turbine is saved, the purpose of improving the power generation efficiency of the steam turbine of a power plant is achieved, the power generation efficiency of the power plant is not influenced by the environmental temperature, the vacuum leakage and the size of the vacuum pump, and the generator is in an optimized state without being influenced by the natural environmental temperature. Each booster pump in the booster pump system can form a structure of series connection, parallel connection or a plurality of groups of structures of series connection and then parallel connection according to requirements, and the migration speed of the dead steam can be maximized.
The invention is the biggest difference with the vacuum system composed of the power plant system in the prior art and the prior reconstruction technology, and is characterized in that a booster pump system is directly arranged between a steam turbine and a condenser, but not a mode of increasing the vacuum of the condenser by using vacuum obtaining equipment such as a mechanical pump or a steam pump arranged behind the condenser on the market to indirectly improve the power generation efficiency of the steam turbine, so that the structure of the invention can effectively avoid the characteristic that the condenser is influenced by the temperature and the leakage rate of cooling water, can more directly, greatly and more efficiently ensure that the vacuum degree of the system is not influenced by seasons, and is always stabilized in the interval with the highest power generation efficiency of the steam turbine.
In summary, the above detailed description is specific to one possible embodiment of the present invention, but the embodiment is not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the technical spirit of the present invention are intended to be included within the scope of the present invention.
Claims (11)
1. A kind of booster system of condenser leading that can improve the steam turbine generating efficiency of the thermal power plant, use on steam turbine of the thermal power plant, the steam turbine regards steam as the power, and turn the heat energy of the steam into the mechanical work, in order to drive the generator of the thermal power plant; the steam turbine is provided with an exhaust end, and after pressurized steam passes through the steam turbine and drives the steam turbine, the steam loses power to form dead steam, and the dead steam is exhausted outwards through the exhaust end;
its characterized in that, this leading turbocharging system of condenser includes:
the booster pump system comprises an inlet end, an outlet end and at least one booster pump; the inlet end of the booster pump system is connected with the exhaust end of the steam turbine through an input pipeline; each booster pump comprises an air inlet end and an air outlet end; the dead steam exhausted from the exhaust end of the steam turbine is input into the at least one booster pump from the inlet end for boosting and then output from the outlet end; and
the condenser comprises an input end, and the outlet end of the booster pump system is connected with the input end of the condenser through an output pipeline; the condenser receives the waste steam which is from the booster pump system and is boosted, and condenses the boosted waste steam into water.
2. The condenser pre-pressurization system according to claim 1, characterized in that: the at least one booster pump is a plurality of booster pumps, and the plurality of booster pumps are connected in parallel.
3. The condenser pre-pressurization system according to claim 1, characterized in that: the at least one booster pump is a plurality of booster pumps which form a serial connection mode so as to increase the pressure difference; wherein the corresponding air inlet end and the exhaust end of two adjacent booster pumps are mutually connected through a conveying pipeline.
4. The condenser pre-pressurization system according to claim 1, characterized in that: the booster pump is selected from a roots vacuum pump, a centrifugal pump, a turbine, a jet pump or a gas moving power plant with a large pumping capacity or a gas pump capable of promoting the migration speed of gas.
5. The condenser pre-pressurization system according to claim 1, characterized in that: and a valve is arranged at the air inlet end of each booster pump and used for closing the corresponding booster pump when needed so as to ensure that the corresponding booster pump is separated from the operation of the whole booster pump system.
6. The condenser pre-pressurization system according to claim 1, characterized in that: the condenser is a water-cooling condenser or an air-cooling condenser.
7. The condenser pre-pressurization system according to claim 1, characterized in that: still include a vacuum pumping system, wherein this condenser still includes an output and is connected with this vacuum pumping system, and this vacuum pumping system is arranged in extracting the non-condensable gas in this condenser for the inside vacuum that forms of this condenser.
8. The condenser pre-pressurization system according to claim 7, characterized in that: the vacuum-pumping system is characterized by further comprising a steam-water separator, wherein the vacuum-pumping system is connected with the steam-water separator, and the steam-water separator is used for separating a steam-water mixture output by the vacuum-pumping system into air and liquid water.
9. The condenser pre-pressurization system according to claim 1, characterized in that: and the steam-water separator is used for separating a steam-water mixture output by the condenser into air and liquid water.
10. The condenser pre-pressurization system according to claim 1, characterized in that: the booster pump is connected with a driving motor, the driving motor is connected with a control mechanism, and the driving motor is controlled by the control mechanism to drive the booster pump; each booster pump is also connected with a cooling mechanism which is used for inputting cooling water into the booster pump for cooling, wherein the control mechanism controls the driving motor in a frequency conversion mode and regulates and controls the performance of the booster pump according to the frequency conversion characteristic.
11. The condenser pre-pressurization system according to claim 10, characterized in that: each booster pump is also provided with a pressure sensor and a temperature sensor; the pressure sensor and the temperature sensor are connected with the control mechanism; the pressure value and the temperature value detected by the pressure sensor and the temperature sensor are transmitted to the control mechanism to control the driving motor and the cooling mechanism so as to protect the booster pump to stably operate.
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| CN202010095709.XA CN113266554A (en) | 2020-02-17 | 2020-02-17 | Condenser preposed supercharging system capable of improving power generation efficiency of steam turbine of thermal power plant |
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| CN202010095709.XA CN113266554A (en) | 2020-02-17 | 2020-02-17 | Condenser preposed supercharging system capable of improving power generation efficiency of steam turbine of thermal power plant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12049908B2 (en) | 2022-11-14 | 2024-07-30 | Industrial Technology Research Institute | Pressure difference generating apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1034246A (en) * | 1988-12-13 | 1989-07-26 | 张吉林 | Low backpressure regenerating condensed steam type turbine equipment |
| US20150078924A1 (en) * | 2012-04-29 | 2015-03-19 | Sichuan Honghua Petroleum Equipment Co., Ltd. | Fracturing Pump |
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