CN220226988U - Shaft seal steam temperature optimization control system - Google Patents
Shaft seal steam temperature optimization control system Download PDFInfo
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- CN220226988U CN220226988U CN202321768167.3U CN202321768167U CN220226988U CN 220226988 U CN220226988 U CN 220226988U CN 202321768167 U CN202321768167 U CN 202321768167U CN 220226988 U CN220226988 U CN 220226988U
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Abstract
The utility model relates to a shaft seal steam temperature optimization control system for improving the vibration of a steam turbine, which is connected with corresponding parts of a power plant steam turbine system, a shaft seal steam system and an auxiliary steam system and comprises a shaft seal pressure temperature adjusting module, a measuring module, a data storage and transmission module, a control module, a safety protection module, a man-machine interaction module and an alarm module. The shaft seal steam temperature optimization control system cools the high-temperature shaft seal steam leakage through additionally introducing the auxiliary steam after temperature reduction into the shaft seal steam supply main pipe, controls the temperature and pressure stability of the shaft seal steam supply main pipe, and achieves the effect of controlling the vibration of the low-pressure cylinder bearing of the steam turbine and corresponding automatic operation and protection.
Description
Technical Field
The utility model relates to a shaft seal steam temperature optimization control system for improving turbine vibration, and belongs to the technical field of turbine thermodynamic mechanical equipment.
Background
The general turbine shaft seal system is above a certain load, and the shaft seal main pipe steam source is completely supplied by the steam leakage of the gate rod and the steam leakage of the high-pressure cylinder, so that self-sealing is realized. Therefore, the temperature of the high-pressure end of the main shaft seal pipe is basically consistent with the leakage temperature of the shaft seal of the high-pressure cylinder, and the leakage temperature of the shaft seal of the high-pressure cylinder is consistent with the change of the high-exhaust temperature. Under the current trend of developing new energy, the thermal power generating unit becomes a peak shaving unit gradually, the load change is large, and the lifting trend is fast.
The shaft seal temperature frequently and greatly fluctuates due to the change of the load change unit or the leakage steam temperature, so that the local cold and hot of the shaft seal section are easy to be uneven, friction is caused between the sealing piece and the large shaft, and further the vibration amplitude and the frequency of the bearing are increased. Improper shaft seal temperature control can cause high tripping of unit vibration and even cause major equipment damage accidents of locking of a large shaft.
After a certain load is applied to the steam turbine, the shaft seal system can achieve self-sealing, auxiliary steam is not supplied, so that the auxiliary steam is not flowing any more, the steam descends, once the steam supply is recovered, the auxiliary steam cannot enter the shaft seal for standby due to the fact that the temperature is too low, the auxiliary steam main pipe needs to be heated, the working efficiency is reduced, and improvement is needed urgently.
Disclosure of Invention
The utility model aims to provide a shaft seal steam temperature optimization control system for improving vibration of a steam turbine, so as to solve the problem of bearing vibration caused by improper shaft seal temperature control in the prior art.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
the utility model provides a bearing seal steam temperature optimizing control system, includes the system body, the system body is connected with steam turbine system, bearing seal steam system and auxiliary steam system respectively, the system body includes: and the control module is used for: for sending out control signals and receiving feedback signals;
shaft seal pressure temperature regulation module: the control valve is electrically connected with the control module and is used for adjusting the opening of the valve according to a control signal of the control module so as to control the pressure and the temperature of the steam supply of the shaft seal and the pressure and the temperature of the main pipe of the steam supply of the shaft seal;
and the data storage and transmission module is used for: the control module is electrically connected with the control module and is used for transmitting data;
and a measurement module: and the data storage and transmission module is electrically connected with the data storage and transmission module and is used for measuring the pressure and the temperature of the shaft seal steam supply, the pressure and the temperature of the shaft seal steam supply main pipe and the opening degree of each control valve and feeding back the measured data to the data storage and transmission module.
Preferably, the control valve includes: the device comprises a shaft seal steam supply regulating valve, a shaft seal steam release regulating valve, a shaft seal steam supply temperature and pressure reducer and a shaft seal steam supply temperature and pressure reduction water regulating valve, wherein the shaft seal steam supply regulating valve, the shaft seal steam release regulating valve, the shaft seal steam supply temperature and pressure reducer and the shaft seal steam supply temperature and pressure reduction water regulating valve receive control signals of a control module and then carry out valve opening adjustment.
Preferably, the measurement module includes:
shaft seal pressure sensor a and shaft seal pressure sensor B: the pressure measuring device is used for measuring the pressure of a main pipe for supplying steam to a shaft seal of the steam turbine;
shaft seal main pipe temperature sensor: the temperature measuring device is used for measuring the temperature of the shaft seal steam supply main pipe;
shaft seal steam supply pressure sensor: the shaft seal steam supply pressure after the auxiliary steam output by the auxiliary steam main pipe is output by the shaft seal steam supply temperature and pressure reducer is measured;
shaft seal steam supply temperature sensor: the auxiliary steam supply device is used for measuring the shaft seal steam supply temperature of auxiliary steam output by the auxiliary steam main pipe after being output by the shaft seal steam supply temperature and pressure reducer;
shaft seal steam supply regulating valve position sensor: the opening degree of the shaft seal steam supply regulating valve is measured;
shaft seal steam release regulating valve position sensor: the opening degree of the shaft seal steam leakage regulating valve is measured;
shaft seal steam supply temperature and pressure reducer valve position sensor: the opening degree of the feedback shaft seal steam supply temperature and pressure reducer is measured;
shaft seal steam supply and temperature reduction water regulating valve position sensor: the opening degree of the shaft seal steam supply and temperature reduction water regulating valve is measured;
the shaft seal pressure sensor A, the shaft seal pressure sensor B and the shaft seal main pipe temperature sensor are connected with the shaft seal steam supply main pipe;
the shaft seal steam supply temperature and pressure reducer and the shaft seal steam supply regulating valve are sequentially connected with the output end of the auxiliary steam main pipe;
the output end of the shaft seal steam-supply temperature-reduction water regulating valve is connected with a pipeline of the output end of the shaft seal steam-supply temperature-reduction pressure reducer;
the shaft seal steam supply temperature sensor is arranged at the downstream position of the pipeline connection position of the output end of the shaft seal steam supply temperature-reducing water regulating valve and the output end of the shaft seal steam supply temperature-reducing pressure reducer;
the shaft seal steam leakage adjusting valve is arranged on a pipeline from the shaft seal where the condenser and the shaft seal cooler are located to the condenser, and the shaft seal steam leakage adjusting valve, the condenser and the shaft seal cooler are sequentially connected in series.
Preferably, the system body further comprises: and the man-machine interaction module is used for: the control module is electrically connected with the control module and is used for inputting control instructions to the control module; and (3) a display screen: and the control module is electrically connected with the display module and is used for displaying the data measured by the measurement module.
Preferably, the system body further comprises an alarm module in communication connection with the man-machine interaction module: the alarm module is used for reporting dangerous working conditions.
Preferably, the alarm module includes: and an audible and visual alarm unit: the system is used for carrying out audible and visual alarm on dangerous working conditions; alarm reset key: is used for releasing the audible and visual alarm.
Preferably, the control system further comprises: and a safety protection module: and the alarm module is electrically connected with the control module and the data storage transmission module respectively and is used for monitoring whether the data detected by the data storage transmission module is abnormal or not, and generating an alarm instruction and transmitting the alarm instruction to the alarm module through the control module when the data is detected to be abnormal.
Preferably, the data storage and transmission module includes: a data storage unit: the data storage module is used for storing the data detected by the measurement module; a data transmission unit: for transmitting the data stored by the data storage unit to the security protection module and the control module.
Compared with the prior art, the utility model has the following beneficial effects:
1. in the utility model, the condensed water system provides condensed water for auxiliary steam temperature reduction provided by the auxiliary steam main pipe through the shaft seal steam supply temperature reduction water regulating valve, and after the auxiliary steam is subjected to temperature reduction and pressure reduction through the shaft seal steam supply temperature reduction pressure reducer, the auxiliary steam enters the shaft seal steam supply main pipe through the shaft seal steam supply regulating valve to cool high-temperature shaft seal steam release, and a certain pressure is provided, so that the temperature and pressure stability of the shaft seal steam supply main pipe are realized.
2. According to the utility model, the temperature of the shaft seal steam supply main pipe is controlled to be stable, so that the local uneven heating of the shaft seal section is reduced, the friction between the sealing piece and the large shaft is reduced, and the vibration level of the low-pressure cylinder side bearing is reduced and can be kept stable.
3. According to the utility model, after the shaft seal system achieves self-sealing, the auxiliary steam main pipe still keeps supplying steam, so that the flow of auxiliary steam is ensured, the temperature of the auxiliary steam is stable, and the problem that the auxiliary steam cannot be used for standby due to low temperature when the auxiliary steam is supplied to the shaft seal is solved.
4. According to the utility model, the temperature of the shaft seal main pipe is stabilized, the vibration level of the low-pressure cylinder side bearing is reduced and kept stable, and the safety and reliability of the unit operation are improved, so that the economic benefit of the unit is improved.
5. In the utility model, the control system can be directly connected with the original steam turbine system, shaft seal steam system and auxiliary steam system of the power plant, so the modification cost is low.
Drawings
FIG. 1 is a schematic diagram of the connection of the present utility model.
Fig. 2 is a block diagram of the connection of the present utility model.
The reference numerals in the drawings are as follows:
1. a high-pressure cylinder; 2. a medium pressure cylinder; 3. a low-pressure cylinder of the steam turbine; 4. a low-pressure cylinder of the steam turbine; 5. a shaft seal cooler; 6. a condenser; 7. a condensate system; 8. an auxiliary steam main pipe; 9. a shaft seal steam supply main pipe; 10. a shaft seal leakage main pipe; 11. the shaft seal discharges steam to a condenser pipeline;
101. a security protection module; 102. a measurement module; 103. a data storage transmission module; 104. a man-machine interaction module; 105. an alarm module; 106. a control module; 107. a shaft seal pressure temperature regulating module;
701. a shaft seal steam supply regulating valve; 702. a shaft seal steam release regulating valve; 703. a shaft seal steam supply temperature and pressure reducer; 704. a shaft seal steam supply and temperature reduction water regulating valve;
201. a shaft seal pressure sensor A; 202. a shaft seal pressure sensor B; 203. a shaft seal main pipe temperature sensor; 204. a shaft seal steam supply pressure sensor; 205. a shaft seal steam supply temperature sensor; 206. a shaft seal steam supply regulating valve position sensor; 207. a shaft seal steam release regulating valve position sensor; 208. a valve position sensor of a shaft seal steam supply temperature and pressure reducer; 209. a shaft seal steam supply temperature-reducing water regulating valve position sensor;
301. a data storage unit; 302. and a data transmission unit.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1, a shaft seal steam temperature optimization control system comprises a system body, wherein the system body is respectively connected with a steam turbine system, a shaft seal steam system and an auxiliary steam system, and the system body comprises:
control module 106: for sending out control signals and receiving feedback signals;
shaft seal pressure temperature regulation module 107: the control valve is electrically connected with the control module 106 and is used for adjusting the opening of the valve according to a control signal of the control module 106 so as to control the pressure and the temperature of the shaft seal steam supply and the pressure and the temperature of the shaft seal steam supply main pipe 9;
data storage transmission module 103: electrically connected to the control module 106 for transmitting data;
measurement module 102: and the data storage and transmission module 103 is electrically connected with the control valve and used for measuring the pressure and temperature of the shaft seal steam supply, the pressure and temperature of the shaft seal steam supply main pipe 9 and the opening degree of each control valve, and feeding back the measured data to the data storage and transmission module 103.
Preferably, the control valve includes:
the shaft seal steam supply regulating valve 701, the shaft seal steam release regulating valve 702, the shaft seal steam supply temperature and pressure reducer 703 and the shaft seal steam supply temperature and pressure reduction water regulating valve 704 are subjected to valve opening degree regulation after receiving control signals of the control module 106.
Preferably, the measurement module 102 includes:
shaft seal pressure sensor a201 and shaft seal pressure sensor B202: the pressure measuring device is used for measuring the pressure of a main pipe 9 for supplying steam to a shaft seal of the steam turbine;
shaft seal main pipe temperature sensor 203: for measuring the temperature of the shaft seal steam supply main pipe 9;
shaft seal supply pressure sensor 204: the auxiliary steam supply pressure measuring device is used for measuring the shaft seal steam supply pressure of auxiliary steam output by the auxiliary steam main pipe 8 after being output by the shaft seal steam supply temperature and pressure reducer 703;
shaft seal steam supply temperature sensor 205: the auxiliary steam output by the auxiliary steam main pipe 8 is used for measuring the shaft seal steam supply temperature after being output by the shaft seal steam supply temperature and pressure reducer 703;
shaft seal steam supply regulator valve position sensor 206: for measuring the opening of the shaft seal steam supply regulating valve 701;
shaft seal bleed control valve position sensor 207: for measuring the opening of the shaft seal bleed control valve 702;
shaft seal steam supply temperature and pressure reducer valve position sensor 208: the opening degree of the feedback shaft seal steam supply temperature and pressure reducer 703 is measured;
shaft seal steam supply and temperature reduction water regulating valve position sensor 209: the opening degree of the shaft seal steam supply and temperature reduction water regulating valve 704 is measured;
the shaft seal pressure sensor A201, the shaft seal pressure sensor B202 and the shaft seal main pipe temperature sensor 203 are all connected with the shaft seal steam supply main pipe 9;
the shaft seal steam supply temperature and pressure reducer 703 and the shaft seal steam supply regulating valve 701 are sequentially connected with the output end of the auxiliary steam main pipe 8;
the shaft seal steam supply temperature-reducing water regulating valve 704 is connected with the output end of the condensate system 7, and the output end of the shaft seal steam supply temperature-reducing water regulating valve 704 is connected with a pipeline at the output end of the shaft seal steam supply temperature-reducing pressure reducer 703;
the shaft seal steam supply temperature sensor 205 is arranged at a downstream position of a pipeline connection position between the output end of the shaft seal steam supply temperature-reducing water regulating valve 704 and the output end of the shaft seal steam supply temperature-reducing pressure reducer 703;
the shaft seal steam leakage adjusting valve 702 is arranged on a shaft seal steam leakage to condenser pipeline 11 where the condenser 6 and the shaft seal cooler 5 are arranged, and the shaft seal steam leakage adjusting valve 702, the condenser 6 and the shaft seal cooler 5 are sequentially connected in series.
Preferably, the system body further comprises: man-machine interaction module 104: electrically connected with the control module 106, and configured to input a control instruction to the control module 106; display 401: is electrically connected to the control module 106 for displaying the data measured by the measurement module 102.
Preferably, the system body further comprises an alarm module 105 communicatively connected with the man-machine interaction module 104: the alarm module 105 is used to report dangerous conditions.
Preferably, the alarm module 105 includes: audible and visual alarm unit 501: the system is used for carrying out audible and visual alarm on dangerous working conditions; alarm reset key 502: is used for releasing the audible and visual alarm.
Preferably, the control system further comprises: the security protection module 101: and the alarm module is respectively and electrically connected with the control module 106 and the data storage and transmission module 103 and is used for monitoring whether the data detected by the data storage and transmission module 103 is abnormal, and when the data is detected to be abnormal, an alarm instruction is generated and transmitted to the alarm module 105 through the control module 106.
Preferably, the data storage and transmission module 103 includes: the data storage unit 301: for storing the data detected by the measurement module 102; a data transmission unit 302: for transmitting data stored in the data storage unit 301 to the security module 101 and the control module 106.
Specifically, setting the pressure P1MPa and the temperature T1 ℃ of the shaft seal steam supply, and the pressure P2MPa and the temperature T2 ℃ of the shaft seal steam supply main pipe 9, then:
the condensate water system 7 provides condensate water for auxiliary steam temperature reduction provided by an auxiliary steam main pipe 8 through a shaft seal steam temperature reduction water regulating valve 704, the auxiliary steam is subjected to temperature reduction and pressure reduction through a shaft seal steam temperature reduction pressure reducer 703 to become shaft seal steam supply with the pressure P1MPa and the temperature T1 ℃, and the shaft seal steam supply pressure sensor 204 and the shaft seal steam supply temperature sensor 205 measure and feed back the shaft seal steam supply temperature reduction pressure reducer 703 and the shaft seal steam temperature reduction water regulating valve 704;
the opening degree of the seal steam supply regulating valve 701 is regulated by the seal steam supply main pipe pressure regulating mode and the seal steam supply main pipe temperature regulating mode so as to control the pressure P2MPa and the temperature T2 ℃ of the seal steam supply main pipe 9, and the pressure P2MPa and the temperature T2 ℃ of the seal steam supply main pipe 9 are measured by a seal steam pressure sensor A201, a seal steam pressure sensor B202 and a seal main pipe temperature sensor 203 and fed back to the seal steam supply regulating valve 701 and the seal steam leakage regulating valve 702;
the shaft seal steam leakage adjusting valve 702 is used for assisting in adjusting the pressure P2MPa of the shaft seal steam supply main pipe 9 in a steam leakage mode; the shaft seal steam supply regulating valve position sensor 206, the shaft seal steam discharge regulating valve position sensor 207, the shaft seal steam supply temperature and pressure reducing device valve position sensor 208 and the shaft seal steam supply temperature and pressure reducing water regulating valve position sensor 209 are used as valve position feedback of the regulating valve to participate in regulation;
in one embodiment, the specific program control of the pressure and temperature of the shaft seal steam header 9 by the shaft seal steam header pressure regulation mode and the shaft seal steam header temperature regulation mode is as follows:
1) Putting the device into a shaft seal pressure temperature regulation module 107, receiving a command S3 by a shaft seal steam supply temperature and pressure reducer 703, and controlling the pressure of condensate water;
2) Putting the auxiliary steam into a shaft seal pressure temperature regulating module 107, and receiving a command S4 by a shaft seal steam supply temperature reducing water regulating valve 704 to control the temperature of auxiliary steam;
3) The seal pressure and temperature regulating module 107 is put into, the seal steam supply regulating valve 701 and the seal steam leakage regulating valve 702 are automatically controlled, the total instructions S of the seal steam supply regulating valve 701 and the seal steam leakage regulating valve 702 are unchanged through the associated control, the separate instructions S1 and S2 of the seal steam supply regulating valve 701 and the seal steam leakage regulating valve 702 are respectively output, and the pressure of the seal steam supply main pipe 9 is controlled to be P2MPa;
4) When the shaft seal steam supply main pipe temperature regulation mode is put into the shaft seal pressure temperature regulation module 107, after the load is reduced, when the temperature of the low pressure section of the shaft seal steam supply main pipe 9 is higher than T2 ℃, the module outputs a sub-instruction S1, the shaft seal steam supply regulation valve 701 is regulated and opened in proportion, and the steam supply amount of the shaft seal steam supply main pipe 9 is increased so as to control the temperature of the low pressure end of the shaft seal steam supply main pipe 9 to be within a certain range;
5) When the pressure of the main shaft seal steam supply pipe 9 is lower than P2MPa and the main shaft seal steam supply regulating valve 701 needs to be opened, the module outputs a sub-instruction S1 (namely a main shaft seal steam supply pipe pressure regulating mode in the prior art), and the sub-instruction S1 is compared with the opening controlled by the main shaft seal steam supply regulating valve 701 by the temperature regulating loop (namely the main shaft seal steam supply pipe temperature regulating mode), and the main shaft seal steam supply regulating valve 701 is controlled by the sub-instruction S1; the module outputs a sub-instruction S2, and the shaft seal steam leakage adjusting valve 702 is adjusted and opened in proportion, so that the steam leakage is reduced; so that the pressure of the low pressure end of the shaft seal steam supply main pipe 9 is within a certain range.
As shown in fig. 2, the working logic of the safety protection module 101 of the shaft seal steam temperature optimization control system for improving the vibration of the steam turbine is as follows:
the safe temperature difference between the shaft seal steam supply and the shaft seal steam supply main pipe 9 is not more than T3 at the highest;
the pressure range of safe operation of the main pipe for supplying steam by the shaft seal is L1-H1; the safe working temperature range of the main pipe for supplying steam by the shaft seal is L2-H2;
therefore, the dangerous working condition is that T1-T2 is more than or equal to T3, and P1 is out of the range of L1-H1 or T2 is out of the range of L2-H2;
1) Limiting the opening and closing action speed of the shaft seal steam supply regulating valve 701, and preventing the shaft seal steam supply pressure from fluctuating greatly or preventing the shaft seal from being crashed or even locked by the fact that the temperature of the shaft seal steam supply is not regulated timely;
2) The shaft seal steam supply temperature T1-shaft seal main pipe temperature T2 is more than or equal to T3, and the shaft seal steam supply regulating valve 701 is forcibly closed; wherein the shaft seal steam supply temperature is measured by a shaft seal steam supply temperature sensor 205, and the shaft seal main pipe temperature is measured by a shaft seal main pipe temperature sensor 203;
meanwhile, if either the shaft seal pressure sensor A201 or the shaft seal pressure sensor B202 is higher than the high value H1 and lower than the low value L1, the sound and light alarm unit 501 is operated, and after the condition is released, the alarm reset key 502 controls the sound and light alarm unit 501 to reset;
meanwhile, the shaft seal main pipe temperature sensor 203 is higher than a high value H2 and lower than a low value L2, acts on the audible and visual alarm unit 501, and after the condition is relieved, the audible and visual alarm unit 501 is controlled to reset by the alarm reset key 502;
when the shaft seal steam supply regulating valve 701 is forced to be closed, alarming is carried out, the shaft seal steam supply regulating valve acts on the audible and visual alarming unit 501, and after the condition is released, the alarming reset key 502 controls the audible and visual alarming unit 501 to reset;
the safety protection logic realizes the purpose of safe operation of the shaft seal steam temperature optimal control system through reasonable fixed value and logic control.
The final achieved effect is exemplified by data for a 660MW steam turbine:
1. in terms of temperature control: the temperature of the low-pressure end of the shaft seal main pipe is 272 ℃ before reconstruction and 310 ℃ or above under low load; the temperature of the low-pressure end of the main shaft seal pipe of the full-load section after transformation is 270-285 ℃.
2. In terms of vibration control: the vibration of the #5 watt shaft is between 70 and 85 mu m before transformation, and the vibration of the #5 watt shaft gradually increases when the running time of the random group is prolonged; the temperature of the low-pressure end of the main shaft seal pipe of the full load section after transformation is 270-285 ℃, the vibration of the #5 watt shaft is kept between 40-70 mu m, the vibration is gradually reduced along with the increase of the running time, and finally the vibration is stabilized between 20-40 mu m.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "inner", "outer", "upper", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the term "connected" should be interpreted broadly, and for example, it may be a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The utility model aims to provide a shaft seal steam temperature optimization control system for improving the vibration of a steam turbine, wherein a safety protection module 101, a measurement module 102, a data storage transmission module 103, a man-machine interaction module 104, an alarm module 105, a control module 106 and a shaft seal pressure temperature adjustment module 107 are all controlled by instructions by the conventional equipment import program, and the functions described in the utility model are only used for fully describing the working principle of the utility model and are not part of the technical scheme claimed by the utility model, and are also only used for facilitating the understanding of the scheme by a person skilled in the art, so that the program is not an essential feature of the technical scheme of the utility model.
Claims (8)
1. The utility model provides a bearing seal steam temperature optimizing control system, includes the system body, the system body is connected with steam turbine system, bearing seal steam system and auxiliary steam system respectively, its characterized in that, the system body includes:
control module (106): for sending out control signals and receiving feedback signals;
shaft seal pressure temperature regulation module (107): the control valve is electrically connected with the control module (106) and is used for adjusting the opening of the valve according to a control signal of the control module (106) so as to control the pressure and the temperature of the shaft seal steam supply and the pressure and the temperature of the shaft seal steam supply main pipe (9);
a data storage transmission module (103): is electrically connected with the control module (106) and is used for transmitting data;
measurement module (102): and the device is electrically connected with the data storage and transmission module (103) and is used for measuring the pressure and temperature of the shaft seal steam supply, the pressure and temperature of the shaft seal steam supply main pipe (9) and the opening degree of each control valve, and feeding back the measured data to the data storage and transmission module (103).
2. The shaft seal steam temperature optimizing control system as defined in claim 1, wherein: the control valve comprises a shaft seal steam supply adjusting valve (701), a shaft seal steam release adjusting valve (702), a shaft seal steam supply temperature and pressure reducing device (703) and a shaft seal steam supply temperature and pressure reducing water adjusting valve (704), wherein the shaft seal steam supply adjusting valve (701), the shaft seal steam release adjusting valve (702), the shaft seal steam supply temperature and pressure reducing device (703) and the shaft seal steam supply temperature and pressure reducing water adjusting valve (704) receive control signals of the control module (106) and then adjust the opening degree of the valve.
3. The shaft seal steam temperature optimizing control system as defined in claim 2, wherein:
the measurement module (102) comprises:
shaft seal pressure sensor a (201) and shaft seal pressure sensor B (202): the pressure measuring device is used for measuring the pressure of a main pipe (9) for supplying steam to a shaft seal of the steam turbine;
shaft seal main pipe temperature sensor (203): the temperature measuring device is used for measuring the temperature of the shaft seal steam supply main pipe (9);
shaft seal steam supply pressure sensor (204): the device is used for measuring the shaft seal steam supply pressure of auxiliary steam output by an auxiliary steam main pipe (8) after being output by a shaft seal steam supply temperature and pressure reducer (703);
shaft seal steam supply temperature sensor (205): the device is used for measuring the shaft seal steam supply temperature of the auxiliary steam output by the auxiliary steam main pipe (8) after being output by the shaft seal steam supply temperature and pressure reducer (703);
shaft seal steam supply regulating valve position sensor (206): the opening degree of the shaft seal steam supply regulating valve (701) is measured;
shaft seal steam release regulating valve position sensor (207): the opening degree of the shaft seal steam leakage regulating valve (702) is measured;
shaft seal steam supply temperature and pressure reducer valve position sensor (208): the opening degree of the feedback shaft seal steam supply temperature and pressure reducer (703) is measured;
shaft seal steam supply temperature-reducing water regulating valve position sensor (209): the opening degree of a shaft seal steam supply and temperature reduction water regulating valve (704) is measured;
the shaft seal pressure sensor A (201), the shaft seal pressure sensor B (202) and the shaft seal main pipe temperature sensor (203) are connected with the shaft seal steam supply main pipe (9);
the shaft seal steam supply temperature and pressure reducer (703) and the shaft seal steam supply regulating valve (701) are sequentially connected with the output end of the auxiliary steam main pipe (8);
the output end of the shaft seal steam supply temperature-reducing water regulating valve (704) is connected with a pipeline of the output end of the shaft seal steam supply temperature-reducing pressure reducer (703);
the shaft seal steam supply temperature sensor (205) is arranged at the downstream position of the pipeline connection part between the output end of the shaft seal steam supply temperature-reducing water regulating valve (704) and the output end of the shaft seal steam supply temperature-reducing pressure reducer (703);
the shaft seal steam leakage adjusting valve (702) is arranged on a shaft seal steam leakage to condenser pipeline (11) where the condenser (6) and the shaft seal cooler (5) are located, and the shaft seal steam leakage adjusting valve (702), the condenser (6) and the shaft seal cooler (5) are sequentially connected in series.
4. The shaft seal steam temperature optimizing control system as defined in claim 1, wherein: the system body further comprises:
man-machine interaction module (104): is electrically connected with the control module (106) and is used for inputting control instructions to the control module (106);
display (401): is electrically connected with the control module (106) and is used for displaying the data measured by the measurement module (102).
5. The shaft seal steam temperature optimizing control system as defined in claim 4, wherein:
the system body also comprises an alarm module (105) which is in communication connection with the man-machine interaction module (104): the alarm module (105) is used for reporting dangerous working conditions.
6. The shaft seal steam temperature optimizing control system as defined in claim 5, wherein: the alarm module (105) comprises:
an audible and visual alarm unit (501): the system is used for carrying out audible and visual alarm on dangerous working conditions;
alarm reset key (502): is used for releasing the audible and visual alarm.
7. The shaft seal steam temperature optimizing control system as defined in claim 1, wherein:
the control system further includes:
safety protection module (101): and the alarm module is respectively and electrically connected with the control module (106) and the data storage and transmission module (103) and is used for monitoring whether the data detected by the data storage and transmission module (103) are abnormal, and when the data are detected to be abnormal, an alarm instruction is generated and transmitted to the alarm module (105) through the control module (106).
8. The shaft seal steam temperature optimizing control system as defined in claim 7, wherein:
the data storage transmission module (103) comprises:
a data storage unit (301): for storing data detected by the measurement module (102);
a data transmission unit (302): for transmitting data stored by the data storage unit (301) to the security module (101) and the control module (106).
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