CN201884082U - Driving system utilizing waste heat steam - Google Patents
Driving system utilizing waste heat steam Download PDFInfo
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- CN201884082U CN201884082U CN2010205967812U CN201020596781U CN201884082U CN 201884082 U CN201884082 U CN 201884082U CN 2010205967812 U CN2010205967812 U CN 2010205967812U CN 201020596781 U CN201020596781 U CN 201020596781U CN 201884082 U CN201884082 U CN 201884082U
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Abstract
A driving system utilizing waste heat steam comprises a steam turbine (3), a mechanical rotation device (1) and a motor device (5). The mechanical rotation device (1) and the motor device (5) are respectively connected with the steam turbine. The driving system is characterized in that the motor device (5) has a generator mode, a motor mode and a preset rotation speed threshold valve, when the rotation speed of the motor device (5) is smaller than the preset rotation speed threshold valve, the motor device (5) is in the motor mode so as to cooperate with the steam turbine (3) to drive the mechanical rotation device (1), and when the rotation speed of the motor device (5) is larger than or equal to the preset rotation speed threshold value, the motor device (5) is in the generator mode and driven by the steam turbine (3) to generate power. The system realizes energy cascade utilization and improves comprehensive heat efficiency.
Description
Technical field
The utility model relates generally to thermal power plant or thermoelectricity plant engineering field, especially relates to and utilizes afterheat steam to mechanical rotation equipment, for example feed water pump, blower fan etc., the system that drives.
Background technique
Usually, the high-grade steam that thermal power plant or thermal power plant boiler produce is after Turbo-generator Set acting generating, and low-grade afterheat steam uses for the steam heat user by extracted steam from turbine or steam discharge.Along with the continuous propelling of energy-saving and emission-reduction, these afterheat steams of discharging by steam turbine also are used to drive for example mechanical rotation such as feed water pump, blower fan equipment, to replace the conventional motors drive pattern.For example, at present modes that adopt back pressure turbine and drag feed water pump more.
But still there is deficiency in this pattern, especially in the steam heat user 24 hours with vapour demand and non-constant situation.This situation can cause the air feed load variations bigger, and for example some enterprise's heat load fluctuation surpasses 50%.Loading with vapour when big, can't realize energy cascade utilization to greatest extent, with vapour load hour, can't guarantee mechanical rotation equipment because of the steam turbine power deficiency and normally move.Thus, when the vapour load change was big, this mode can't realize stablizing, safe operation.
The model utility content
The purpose of this utility model is to provide a kind of system that can make full use of the driving device rotating machinery of afterheat steam, with the cascade utilization of the abundant realization energy, improves efficiency of energy utilization.
For this purpose, this utilizes the drive system of afterheat steam to comprise:
-steam turbine;
-mechanical rotation equipment, described equipment is connected with described steam turbine;
-motor device, described motor device is connected with described steam turbine;
It is characterized in that described motor device has generator mode and electric motor mode, and described motor device has default rotating speed threshold values, wherein,
-when the rotating speed of described motor device less than described default rotating speed threshold values the time, described motor device is in described electric motor mode, so that mechanical rotation equipment under the collaborative described Steam Turbine Driven;
The rotating speed of-described motor device is during more than or equal to described default rotating speed threshold values, and described motor device is in described generator mode, and it is generated electricity by described Steam Turbine Driven.
So, with traditional only utilizing motor or only utilize the single-mode of steam turbine to compare, this model utility can maximally utilise steam waste heat, especially under with the situation of vapour fluctuation of load, effectively utilize afterheat driven mechanical rotation equipment, to realize energy cascade utilization and to improve the system synthesis thermal efficiency.Can effectively reduce station service like this, reduce investment.
It is predicted that if thermoelectricity, chemical enterprise have 1000 families to adopt these technology more than nationwide, enterprise of every family presses 2000KW and calculates, and can save every year and mark coal more than 1,000,000 tons, year reduces discharging SO
23.0 more than ten thousand tons, year reduction of discharging NO
x2.0 more than ten thousand tons, year reduction of discharging CO
2More than 440,000 tons, year generation economic benefit is more than 500,000,000 yuan, and this technology is easily applied.
Description of drawings
By reading following explanation, it is obvious that other features and advantages of the present invention will become.These explanations only are exemplary, and set forth in conjunction with relevant drawings, wherein:
-Fig. 1 is the schematic representation according to drive system embodiment of the present utility model;
-Fig. 2 is the schematic representation of water charging system, and wherein this water charging system has according to driving arrangement of the present utility model.
Embodiment
Fig. 1 shows an embodiment of the present utility model.In an embodiment, steam turbine 3 has two shafts or two shaft.One shaft 31 of this steam turbine 3 links to each other with mechanical rotation equipment 1 (as water pump, blower fan etc.) by membrane-type coupling 2, and another shaft 32 of steam turbine 3 links to each other with motor device 5 by elastic coupling flexible coupling 4.
Wherein, motor device 5 is a synchronous motor, can generate electricity and enter generator mode when its rotating speed surpasses synchronous speed as the motor outputting power when its rotating speed is lower than synchronous speed at it.
During operation, pushing turbine 3 under the effect of afterheat steam, the transmission of power of its generation is done work to mechanical rotation equipment, owing to there is the fluctuation of air feed load, when the power of steam turbine 3 can not satisfy the required power of mechanical rotation equipment, motor transmitted not enough power for mechanical rotation equipment 1 by steam turbine 3; When the power of steam turbine 3 surpassed the required power of mechanical rotation equipment, its unnecessary transmission of power to motor made its generating, replenishes station services by station service bus 42.
Particularly, in the embodiment shown in fig. 1, adopt a 2200KW two ends shaft back pressure turbine 3, one shaft 31 connects mechanical rotating machinery 1, feed water pump for example, and another shaft 32 connects synchronous motors.
The rotating speed of motor device also has one and starts threshold values, when back pressure turbine is managed 41 activated vapors by the heat supply network of 0.9Mpa mother, when rotating speed reaches default startup threshold values, after being rated speed, for example, when arriving 2950r/min, combined floodgate motor switch 50 is in case starting torque is to the damage of mechanical rotation equipment 1 and motor reel.And then open mechanical rotation equipment 1 (as water pump, blower fan etc.) inlet/outlet valve (door) 11,12 gradually.
This moment, mechanical rotation equipment 1 and motor rotated under back pressure steam turbine drive power and electrodynamic acting in conjunction.When the back pressure turbine throttle flow increases gradually, exerting oneself of back pressure turbine improves constantly.Simultaneously, along with the increase of steam turbine throttle flow, the electric power of motor constantly descends.After system's rotating speed increased gradually and surpasses the synchronous speed of motor, the operating mode of motor changed generator mode into by electric motor state.When generator mode, just in time opposite when the direction of rotor bar cutting magnetic field and electric motor state because the rotating speed of motor rotor surpasses the synchronous speed of motor, the resistive component of conductor current and electromotive force change direction in the rotor.The resistive component of motor stator currents also changes direction thereupon, and this moment stator electromotive force direction constant and and the stator current resistive component in the same way, electric power be on the occasion of, illustrate that the motor stator winding is to the station service electrical system electromotive power output.When back pressure type steam turbine acc power during less than mechanical rotation equipment power demand; the common driving machinery rotating machinery operation of motor power consumption and back pressure turbine; can guarantee that like this mechanical rotation equipment is not because of the operation steady in a long-term of the wave energy of vapour load; fully realize energy cascade utilization, improve the thermal efficiency.
In addition, show the water charging system that comprises above-mentioned drive system as Fig. 2.Because 24 hours every days, the steam supply load variations was bigger, usually, thermoelectricity plant adopts 7 deoxygenations of one-level higher-pressure deaerator, and its oxygen-eliminating device working pressure is 0.55Mpa, use the female pipe of 0.9Mpa left and right sides heat supply 41 steam to go the moisturizing in the oxygen-eliminating device is heated to 158 ℃, and remove the oxygen content in the water.In order to make full use of the exhaust after above-mentioned back pressure turbine does work, the moisturizing pipeline 9 of this water charging system except comprising oxygen-eliminating device 7, being connected with described oxygen-eliminating device, also in the demineralized water moisturizing pipeline 9 of original water charging system, install low-pressure heater 6 additional, simultaneously the cooling water of boiler slag-cooling machine etc. is introduced low-pressure heater 6, wherein, be sent to described oxygen-eliminating device 7 after the steam discharge heating of the moisturizing in this low-pressure heater 6 by described drive system.
After the 0.10Mpa steam discharge of the back pressure turbine after the acting enters low-pressure heater moisturizing is heated to 95 ℃～100 ℃, deliver to oxygen-eliminating device 7 again.Can improve the deaerating effect of oxygen-eliminating device so on the one hand, on the other hand correspondingly from the moisturizing angle, when rate of water make-up was big, back pressure turbine dragged feed water pump on the one hand, with redundance power drive motor generating, replenished station service on the other hand; When rate of water make-up hour, the power that industrial back pressure turbine drags the feed water pump insufficient section is replenished by motor, has realized that like this feed water pump can operation steady in a long-term because of the vapour load variations, fully realizes the cascade utilization of the energy, improves efficiency of energy utilization.
In addition, the utility model is not subject to above-mentioned embodiment, and comprises any embodiment that is equal to.
Claims (8)
1. drive system of utilizing afterheat steam, it comprises:
-steam turbine (3);
-mechanical rotation equipment (1), it is connected with described steam turbine (3);
-motor device (5), it is connected with described steam turbine (3);
It is characterized in that described motor device (5) has generator mode and electric motor mode, and described motor device has default rotating speed threshold values, wherein,
-when the rotating speed of described motor device (5) less than described default rotating speed threshold values the time, described motor device (5) is in described electric motor mode, so as collaborative described steam turbine (3) drive under mechanical rotation equipment (1);
The rotating speed of-described motor device (5) is during more than or equal to described default rotating speed threshold values, and described motor device (5) is in described generator mode, and it is driven generating by described steam turbine (3).
2. drive system according to claim 1 is characterized in that, described steam turbine (3) is a back pressure turbine.
3. drive system according to claim 2 is characterized in that described back pressure turbine has two shafts.
4. drive system according to claim 3 is characterized in that, a shaft (31) of described pair of shaft is connected with described mechanical rotation equipment (1) by membrane-type coupling, and another shaft (32) is connected with described motor device (5) by elastic coupling flexible coupling.
5. drive system according to claim 1 is characterized in that, described mechanical rotation equipment (1) is feed water pump.
6. according to each described drive system in the claim 1 to 5, it is characterized in that described motor device (5) is a synchronous machine, and described preset rotation speed threshold values is a synchronous speed.
7. drive system according to claim 6, it is characterized in that the rotating speed of described motor device (5) also has one and starts threshold values, when described drive system starts, when the rotating speed of motor device (5) reached described startup threshold values, described electromechanical equipment (5) switch (50) closed a floodgate.
8. drive system according to claim 1, it is characterized in that, also comprise a water charging system, the moisturizing pipeline (9) that this water charging system comprises oxygen-eliminating device (7), is connected with described oxygen-eliminating device, and low-pressure heater (6) is housed also in described moisturizing pipeline (9), wherein, be sent to described oxygen-eliminating device (7) after the steam discharge heating of the moisturizing in the described low-pressure heater (6) by described drive system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205967812U CN201884082U (en) | 2010-11-08 | 2010-11-08 | Driving system utilizing waste heat steam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205967812U CN201884082U (en) | 2010-11-08 | 2010-11-08 | Driving system utilizing waste heat steam |
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| Publication Number | Publication Date |
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| CN201884082U true CN201884082U (en) | 2011-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205967812U Expired - Lifetime CN201884082U (en) | 2010-11-08 | 2010-11-08 | Driving system utilizing waste heat steam |
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| CN (1) | CN201884082U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103362770A (en) * | 2013-08-13 | 2013-10-23 | 中国电力工程顾问集团华东电力设计院 | System and method of back pressure type small steam turbine driving water supply pump for power frequency electric generator speed adjustment |
| CN103397917A (en) * | 2013-08-13 | 2013-11-20 | 中国电力工程顾问集团华东电力设计院 | Back-pressure car driving water-feeding pump system and method adopting variable-frequency power generator for speed regulation |
| CN103397915A (en) * | 2013-08-13 | 2013-11-20 | 中国电力工程顾问集团华东电力设计院 | Blower system speed-governed by power frequency generator and driven by straight condensing small turbine and method |
| CN103397916A (en) * | 2013-08-13 | 2013-11-20 | 中国电力工程顾问集团华东电力设计院 | Blower system speed-governed by power frequency generator and driven by back-pressure small turbine and method |
| CN103398017B (en) * | 2013-08-13 | 2016-06-08 | 中国电力工程顾问集团华东电力设计院有限公司 | The pure condensate formula small turbine drive blower fan system of frequency conversion generator speed governing and method |
| CN105971907A (en) * | 2016-06-27 | 2016-09-28 | 中冶华天工程技术有限公司 | Air draft device and driving method |
| CN107013260A (en) * | 2017-04-10 | 2017-08-04 | 西安西热节能技术有限公司 | System and its operation method based on the double drives of air-introduced machine vapour electricity and variable-frequency power generation |
| CN113006895A (en) * | 2021-04-01 | 2021-06-22 | 济南达能动力技术有限责任公司 | Method and system for reducing station power consumption rate of power plant |
-
2010
- 2010-11-08 CN CN2010205967812U patent/CN201884082U/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103362770A (en) * | 2013-08-13 | 2013-10-23 | 中国电力工程顾问集团华东电力设计院 | System and method of back pressure type small steam turbine driving water supply pump for power frequency electric generator speed adjustment |
| CN103397917A (en) * | 2013-08-13 | 2013-11-20 | 中国电力工程顾问集团华东电力设计院 | Back-pressure car driving water-feeding pump system and method adopting variable-frequency power generator for speed regulation |
| CN103397915A (en) * | 2013-08-13 | 2013-11-20 | 中国电力工程顾问集团华东电力设计院 | Blower system speed-governed by power frequency generator and driven by straight condensing small turbine and method |
| CN103397916A (en) * | 2013-08-13 | 2013-11-20 | 中国电力工程顾问集团华东电力设计院 | Blower system speed-governed by power frequency generator and driven by back-pressure small turbine and method |
| CN103397916B (en) * | 2013-08-13 | 2016-03-30 | 中国电力工程顾问集团华东电力设计院有限公司 | The back pressure type small turbine drive blower fan system of industrial frequency generator speed governing and method |
| CN103397915B (en) * | 2013-08-13 | 2016-03-30 | 中国电力工程顾问集团华东电力设计院有限公司 | The pure condensate formula small turbine drive blower fan system of industrial frequency generator speed governing and method |
| CN103398017B (en) * | 2013-08-13 | 2016-06-08 | 中国电力工程顾问集团华东电力设计院有限公司 | The pure condensate formula small turbine drive blower fan system of frequency conversion generator speed governing and method |
| CN103362770B (en) * | 2013-08-13 | 2016-08-10 | 中国电力工程顾问集团华东电力设计院有限公司 | The back pressure type small turbine of industrial frequency generator speed governing drives feed-water pump and method |
| CN105971907A (en) * | 2016-06-27 | 2016-09-28 | 中冶华天工程技术有限公司 | Air draft device and driving method |
| CN107013260A (en) * | 2017-04-10 | 2017-08-04 | 西安西热节能技术有限公司 | System and its operation method based on the double drives of air-introduced machine vapour electricity and variable-frequency power generation |
| CN113006895A (en) * | 2021-04-01 | 2021-06-22 | 济南达能动力技术有限责任公司 | Method and system for reducing station power consumption rate of power plant |
| CN113006895B (en) * | 2021-04-01 | 2022-02-15 | 济南达能动力技术有限责任公司 | Method and system for reducing station power consumption rate of power plant |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110629 |