CN101701532A - Pure-low temperature and afterheat-utilizing steam turbine control device of steam comprehending and condensing type and control method thereof - Google Patents
Pure-low temperature and afterheat-utilizing steam turbine control device of steam comprehending and condensing type and control method thereof Download PDFInfo
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- CN101701532A CN101701532A CN 200910252827 CN200910252827A CN101701532A CN 101701532 A CN101701532 A CN 101701532A CN 200910252827 CN200910252827 CN 200910252827 CN 200910252827 A CN200910252827 A CN 200910252827A CN 101701532 A CN101701532 A CN 101701532A
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- 230000001276 controlling effect Effects 0.000 claims description 26
- 239000000523 sample Substances 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000005259 measurement Methods 0.000 claims description 3
- 238000004326 stimulated echo acquisition mode for imaging Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 230000003628 erosive effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 235000014171 carbonated beverage Nutrition 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000013481 data capture Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
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Abstract
The invention discloses a pure-low temperature and afterheat-utilizing steam turbine control device of a steam comprehending and condensing type, mainly comprising a steam-admitting control valve and a steam-comprehending control valve. The steam-admitting control valve is arranged on a steam-admitting pipeline of a steam turbine and is in signal connection with at least one rotating speed sensor for measuring the rotating speed of a steam turbine rotor, and the steam-comprehending control valve is arranged on a steam-comprehending pipeline of the steam turbine and is in signal connection with a steam-comprehending pressure transducer arranged on the steam-comprehending pipeline. The control method of the pure-low temperature and afterheat-utilizing steam turbine control device of the steam-comprehending and condensing type comprises the following steps of: controlling a steam amount by adopting the control valves; arranging the steam-admitting control valve on the steam-admitting pipeline; carrying out the closed-loop control on a steam-admitting amount by taking the rotating speed of the steam turbine rotor as a feedback signal; arranging the steam-comprehending control valve on the steam-comprehending pipeline; and carrying out the closed-loop control on a steam-comprehending amount by taking pressure in the steam-comprehending pipeline as a feedback signal. The invention ensures the stable operation of a steam-admitting system and a steam-comprehending system, automatically controls steam admission and steam comprehension, comprehensively utilizes afterheat steam and improves the utilization rate of afterheat.
Description
Technical field
The present invention relates to a kind of Steam Turhine Adjustment device, especially a kind of pure low temperature exhaust heat utilizes filling condensing steam turbine controlling device and controlling method thereof.
Background technique
Industries such as cement, glass, metallurgy can produce the afterheat steam of various different parameters in process of production, some low-grade steam, especially low-pressure saturated steam often is not fully utilized, and directly the waste of the energy is not only in emptying, but also causes environmental pollution.Along with development of science and technology, people require more and more higher to rate of energy, with heat recovery and utilized to generate electricity and become the important means that above-mentioned industry is carried out energy-saving and emission-reduction, pure low temperature exhaust heat utilizes the filling condensing steam turbine to play important effect as the waste heat recovering device in this process.Existing UTILIZATION OF VESIDUAL HEAT IN filling condensing steam turbine is steam regulation effectively, causes the instability of steam, fails to realize fully the performance of steam compensating turbine, thereby influences the stability of steam turbine operation and the efficient of UTILIZATION OF VESIDUAL HEAT IN.
Summary of the invention
A kind of effective steam regulation of providing for the deficiency that solves above-mentioned technology is provided, guarantees that the pure low temperature exhaust heat of steam stable utilizes filling condensing steam turbine controlling device and controlling method thereof.
In order to achieve the above object, the designed pure low temperature exhaust heat of the present invention utilizes filling condensing steam turbine controlling device, it mainly comprises modulating valve, described modulating valve comprises the admission modulating valve that is arranged on the steam turbine admission passage, and be arranged on filling modulating valve on the steam turbine filling pipeline, described admission modulating valve is connected with the signals of rotational speed sensor of at least one MEASUREMENT OF STEAM turbine wheel rotating speed, and this speed probe is regulated required tach signal for the admission modulating valve provides; Thereby form the revolution speed control system of a closed loop, wherein speed probe can guarantee the reliability of data for a plurality of during data capture.Described filling modulating valve is connected with filling pressure transmitter signal on being arranged on the filling pipeline, and this filling pressure transmitter is regulated required pressure signal for the filling modulating valve provides.Can effectively guarantee the steam stable of filling mouth, by two modulating valve are controlled, steam turbine set also can realize the automatic control of admission, filling when guaranteeing admission, filling system stable operation.
In order to make full use of steam and to reach better steam control effect, the signal that preferred scheme is described speed probe is imported a control unit, and revolution speed control system is formed in this control unit control admission modulating valve work; Described admission modulating valve is connected with initial steam pressure transducer signal on being arranged on admission passage, and the signal of this initial steam pressure transmitter is imported and pressed regulating system before described control unit is formed, and control is integrated in the described revolution speed control system as tandem.Pressure signal in the admission passage is stable directly related with steam, and directly influences rotor speed, and is better with this input signal effect as tandem control.Control unit can be various micro processors such as PLC, single-chip microcomputer, DSP.
In order to be independent of admission control, the signal of described filling pressure transmitter can be imported second control unit, this second control unit control filling modulating valve work, form the filling control system, thereby can effectively prevent electrical Interference, even the control unit of admission control takes place also can effectively guarantee the normal operation of filling system, to guarantee the maximized proper functioning of steam turbine when unusual.
Preferred scheme is that described modulating valve is the modulating valve that surges, and it is connected with the hydraulic actuator that matches, and described control unit is electrically connected with hydraulic actuator by electro-control converter with second control unit, and controls corresponding modulating valve work.The control mode of surging stability better is applicable to steam turbine.Except this electric liquid regulative mode, also can adopt pneumatic regulation technology or motorized adjustment technology.
In order in case of emergency to cut off steam rapidly, guarantee the safety of steam turbine, this controlling device also comprises the quick-closing valve that is arranged on admission passage and the filling pipeline, quick-closing valve can be hydraulic operated valve.
Described filling pipeline is provided with centrifugal spiral steam-water separator, before initial steam enters quick-closing valve, earlier through this steam trap connection, steam rotation in this device, under action of centrifugal force, carry out carbonated drink separation earlier, then ducted water of condensation is discharged, can effectively reduce impact and water erosion that steam produces rotor (particularly to blade).
The designed above-mentioned pure low temperature exhaust heat of the present invention utilizes the controlling method of filling condensing steam turbine controlling device, it adopts modulating valve steam regulation amount, it is characterized in that on admission passage, being provided with the admission modulating valve, and be feedback signal, throttle flow is carried out closed loop control with the rotating speed of turbine rotor; Simultaneously the filling modulating valve is set on the filling pipeline, and is feedback signal, the filling amount is carried out closed loop control with the pressure in the filling pipeline.
In order to obtain better to control effect, the pressure signal in the initial steam pressure transmitters sense admission passage can be set on admission passage, and handle the given signal of back as rotating speed with the setting pressure signal contrast, the admission modulating valve is carried out tandem control.
The resulting pure low temperature exhaust heat of the present invention utilizes filling condensing steam turbine controlling device and controlling method thereof, problems of the prior art have been solved effectively, when guaranteeing admission, filling system stable operation, also realized the automatic control of admission, filling, reach the comprehensive utilization of afterheat steam, thereby make UTILIZATION OF VESIDUAL HEAT IN efficient reach the highest.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention 1.
Among the figure: admission passage 1, filling pipeline 2, admission modulating valve 3, filling modulating valve 4, speed probe 5, initial steam pressure transmitter 6, filling pressure transmitter 7, control unit 8, second control unit 9, electro-control converter 10, hydraulic actuator 11, centrifugal spiral steam-water separator 12, quick-closing valve 13.
Embodiment
The invention will be further described in conjunction with the accompanying drawings below by embodiment.
As shown in Figure 1, the described pure low temperature exhaust heat of present embodiment utilizes filling condensing steam turbine controlling device, it mainly comprises modulating valve, described modulating valve comprises the admission modulating valve 3 that is arranged on the steam turbine admission passage 1, and be arranged on filling modulating valve 4 on the steam turbine filling pipeline 2, described admission modulating valve 3 is connected with speed probe 5 signals of two MEASUREMENT OF STEAM turbine wheel rotating speeds, this speed probe 5 is regulated required tach signal for admission modulating valve 3 provides, the signal of speed probe 5 is imported a control unit 8, revolution speed control system is formed in these control unit 8 control admission modulating valve 3 work; Admission modulating valve 3 also be arranged on admission passage 1 on initial steam pressure transmitter 6 signals be connected, the signal of this initial steam pressure transmitter 6 is imported and is pressed regulating system before described control unit 8 is formed, and control is integrated in the described revolution speed control system as tandem.Filling modulating valve 4 is connected with filling pressure transmitter 7 signals on being arranged on filling pipeline 2, this filling pressure transmitter 7 is regulated required pressure signal for filling modulating valve 4 provides, the signal of filling pressure transmitter 7 is imported second control unit 9, these second control unit, 9 control filling modulating valve, 4 work, form the filling control system, thereby can effectively prevent electrical Interference, when even control unit 8 generations of admission control are unusual, also can effectively guarantee the normal operation of filling system, to guarantee the maximized proper functioning of steam turbine.Wherein above-mentioned modulating valve all is the modulating valve that surges, and is connected with the hydraulic actuator 11 that matches on it, and control unit 8 is electrically connected with hydraulic actuator 11 by electro-control converter 10 with second control unit 9, and controls corresponding modulating valve work.In order in case of emergency to cut off steam rapidly, guarantee the safety of steam turbine, this controlling device also comprises the quick-closing valve 13 that is arranged on admission passage 1 and the filling pipeline 2.Described filling pipeline 2 is provided with centrifugal spiral steam-water separator 12, and steam-water separation effect is better, can effectively prevent water erosion.
Above-mentioned pure low temperature exhaust heat utilizes the controlling method of filling condensing steam turbine controlling device, it adopts modulating valve steam regulation amount, it is characterized in that on admission passage 1, being provided with admission modulating valve 3, and be feedback signal, throttle flow is carried out closed loop control with the rotating speed of turbine rotor; Filling modulating valve 4 is set on filling pipeline 2 simultaneously, and with the pressure in the filling pipeline 2 as feedback signal, the filling amount is carried out closed loop control.In order to obtain better to control effect, the pressure signal that initial steam pressure transmitter 6 detects in the admission passage 1 is set on admission passage 1, and handles the given signal of back as rotating speed with the setting pressure signal contrast, admission modulating valve 3 is carried out tandem control.
During work, two-way afterheat steam from factory, one the tunnel is the main steam on the admission passage 1, it enters admission modulating valve 3 through admission quick-closing valve 13, and during work, control unit 8 receives two speed probe 5 signals and compares with speed setting value, current signal is carried out in output, this signal converts the secondary oil pressure to through admission electro-control converter 10, and the secondary oil pressure is handled admission modulating valve 3 by admission hydraulic actuator 11, and this part is a revolution speed control system.Preceding pressure adjusting is controlled in the aforesaid revolution speed control system as tandem and realizes, control unit 8 is relatively exported the control current signal in the back with admission initial steam pressure transmitter 6 signals and the pressure set points that receive, and this signal is as the aperture of the given SC sigmal control admission modulating valve 3 of rotating speed control.When increasing as initial steam pressure, admission modulating valve 3 is opened greatly, and load increases thereupon, and initial steam pressure is got back to setting value; Otherwise when initial steam pressure reduced, admission modulating valve 3 turned down, and load reduces thereupon, and initial steam pressure is got back to setting value.Electro-control converter 10 control techniques such as hydraulic circuit such as grade that relate in the present embodiment are this field routine techniques, do not add tired stating at this.
Another road is a filling steam, enter the steam turbine filling mouth through centrifugal spiral steam-water separator 12, filling quick-closing valve 13, during work, second control unit 9 receives filling pressure transmitter 7 signals, and relatively export the control current signal with the filling pressure set points, this signal converts the secondary oil pressure to through filling electro-control converter 10, and the secondary oil pressure is handled the aperture of filling modulating valve 4 by filling hydraulic actuator 11.When filling pressure rose or descend, filling modulating valve 4 is corresponding to be opened big or turns down, and makes filling pressure get back to setting value.Thereby solve problems of the prior art effectively, when guaranteeing admission, filling system stable operation, also realized the automatic control of admission, filling, reach the comprehensive utilization of afterheat steam, thereby make UTILIZATION OF VESIDUAL HEAT IN efficient reach the highest.
Claims (8)
1. a pure low temperature exhaust heat utilizes filling condensing steam turbine controlling device, it mainly comprises modulating valve, it is characterized in that described modulating valve comprises the admission modulating valve that is arranged on the steam turbine admission passage, and be arranged on filling modulating valve on the steam turbine filling pipeline, described admission modulating valve is connected with the signals of rotational speed sensor of at least one MEASUREMENT OF STEAM turbine wheel rotating speed, and this speed probe is regulated required tach signal for the admission modulating valve provides; Described filling modulating valve is connected with filling pressure transmitter signal on being arranged on the filling pipeline, and this filling pressure transmitter is regulated required pressure signal for the filling modulating valve provides.
2. pure low temperature exhaust heat according to claim 1 utilizes filling condensing steam turbine controlling device, it is characterized in that the signal of described speed probe is imported a control unit, and revolution speed control system is formed in this control unit control admission modulating valve work; Described admission modulating valve is connected with initial steam pressure transducer signal on being arranged on admission passage, and the signal of this initial steam pressure transmitter is imported and pressed regulating system before described control unit is formed, and control is integrated in the described revolution speed control system as tandem.
3. pure low temperature exhaust heat according to claim 2 utilizes filling condensing steam turbine controlling device, the signal that it is characterized in that described filling pressure transmitter is imported second control unit, the filling control system is formed in this second control unit control filling modulating valve work.
4. pure low temperature exhaust heat according to claim 3 utilizes filling condensing steam turbine controlling device, it is characterized in that described modulating valve is the modulating valve that surges, it is connected with the hydraulic actuator that matches, described control unit is electrically connected with hydraulic actuator by electro-control converter with second control unit, and controls corresponding modulating valve work.
5. utilize filling condensing steam turbine controlling device according to claim 1 or 2 or 3 or 4 described pure low temperature exhaust heats, it is characterized in that also comprising the quick-closing valve that is arranged on admission passage and the filling pipeline.
6. pure low temperature exhaust heat according to claim 5 utilizes filling condensing steam turbine controlling device, it is characterized in that described filling pipeline is provided with centrifugal spiral steam-water separator.
7. a pure low temperature exhaust heat as claimed in claim 1 utilizes the controlling method of filling condensing steam turbine controlling device, it adopts modulating valve steam regulation amount, it is characterized in that on admission passage, being provided with the admission modulating valve, and be feedback signal with the rotating speed of turbine rotor, throttle flow is carried out closed loop control; Simultaneously the filling modulating valve is set on the filling pipeline, and is feedback signal, the filling amount is carried out closed loop control with the pressure in the filling pipeline.
8. pure low temperature exhaust heat according to claim 7 utilizes the controlling method of filling condensing steam turbine controlling device, it is characterized in that on admission passage, being provided with the pressure signal in the initial steam pressure transmitters sense admission passage, and handle the given signal of back as rotating speed with the setting pressure signal contrast, the admission modulating valve is carried out tandem control.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910252827 CN101701532B (en) | 2009-11-27 | 2009-11-27 | Pure-low temperature and afterheat-utilizing steam turbine control device of steam comprehending and condensing type and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910252827 CN101701532B (en) | 2009-11-27 | 2009-11-27 | Pure-low temperature and afterheat-utilizing steam turbine control device of steam comprehending and condensing type and control method thereof |
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| CN101701532B CN101701532B (en) | 2013-05-01 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102975013A (en) * | 2011-09-07 | 2013-03-20 | 五冶集团上海有限公司 | Low temperature exhaust heat recycling turbine generator rotor predetermined center installation method |
| CN103334799A (en) * | 2013-06-06 | 2013-10-02 | 西安陕鼓动力股份有限公司 | Method and system for controlling air inflow of double air inflow condensation-type turbine |
| CN103995514A (en) * | 2014-05-27 | 2014-08-20 | 中国轻工业南宁设计工程有限公司 | Combined heat and power generation PLC control system |
-
2009
- 2009-11-27 CN CN 200910252827 patent/CN101701532B/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102975013A (en) * | 2011-09-07 | 2013-03-20 | 五冶集团上海有限公司 | Low temperature exhaust heat recycling turbine generator rotor predetermined center installation method |
| CN103334799A (en) * | 2013-06-06 | 2013-10-02 | 西安陕鼓动力股份有限公司 | Method and system for controlling air inflow of double air inflow condensation-type turbine |
| CN103334799B (en) * | 2013-06-06 | 2015-04-15 | 西安陕鼓动力股份有限公司 | Method and system for controlling air inflow of double air inflow condensation-type turbine |
| CN103995514A (en) * | 2014-05-27 | 2014-08-20 | 中国轻工业南宁设计工程有限公司 | Combined heat and power generation PLC control system |
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| CN101701532B (en) | 2013-05-01 |
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Address after: No. 18, 22nd Street, Hangzhou (Xiasha) Economic Development Zone, Hangzhou City, Zhejiang Province, 310018 Patentee after: Hangzhou Zhongneng Turbine Machinery Equipment Co.,Ltd. Country or region after: China Address before: No. 18, 22nd Street, Hangzhou (Xiasha) Economic Development Zone, Hangzhou City, Zhejiang Province, 310018 Patentee before: HANGZHOU CHINEN STEAM TURBINE POWER CO.,LTD. Country or region before: China |
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