JP2007332807A - Exhaust heat generator set - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an exhaust heat generator set including an inexpensive electric steam stop valve closing means, capable of rapidly and perfectly closing an electric vapor stop valve even in case where power for driving auxiliary machinery cannot be obtained from a host commercial power system cooperatively operated therewith by service interruption of the host commercial power system. <P>SOLUTION: The exhaust heat generator set which includes a vapor generator 11, an electric vapor stop valve 16, a turbine generator 10, a condenser 14, and a medium circulation pump 15 and is cooperatively operated with the host power system comprises an electric vapor stop valve bypass passage L4 for bypassing the stop valve 16, and a bypass valve 20 provided in the bypass passage L4. In the event of service interruption in the host power system, working medium vapor 10 is guided to a turbine 13 of the turbine generator through the bypass valve 20 to drive a generator 18 thereof, closing operation of the stop valve 16 is performed with the power generated by the generator 18, and the bypass valve 20 is closed after the closing operation is completed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a waste heat power generation apparatus that cooperates with a commercial power system that recovers relatively low-temperature waste heat and converts this thermal energy into electric power, and in particular, the power that drives the auxiliary equipment in the commercial power system is commercial power. The present invention relates to a waste heat power generator that can quickly and completely stop a turbine or a generator of a turbine generator even when it cannot be obtained from an electric power system.

  Attempts have been made to effectively recover relatively low-temperature waste heat such as exhaust gas having a temperature of about 200 to 400 ° C. or waste water having a temperature of 60 to 100 ° C. as generated power. Such low-temperature exhaust heat recovery can be realized as a power generator of a closed system using a so-called Rankine cycle or the like.

  FIG. 1 is a diagram showing a basic configuration example of an exhaust heat power generation apparatus using this type of exhaust heat as a heat source. The exhaust heat power generator includes a steam generator 11, a gas-liquid separator 12, a turbine generator 10, a condenser 14, and a medium circulation pump 15. A relatively low temperature exhaust heat medium 100 such as waste water or exhaust gas is introduced into the steam generator 11 as a heat source, and is led from the condenser 14 to the steam generator 11 by the medium circulation pump 15 through the working medium liquid main path L2. The working medium liquid 102 is heated to evaporate, and the generated working medium vapor 101 is led to the gas-liquid separator 12 through the working medium vapor main path L1 and flows along with the working medium vapor 101 in the gas-liquid separator 12. Separate and remove working medium droplets. The working medium liquid 102 separated and removed by the gas-liquid separator 12 returns to the condenser 14 through the working medium liquid return path L3.

  The working medium vapor 101 from which the working medium droplets have been removed by the gas-liquid separator 12 passes to the turbine 13 via the electric motorized steam stop valve 16 and the steam control valve 17 provided in the working medium steam main path L1. Sent. The working medium sent to the turbine 13 rotates and drives the turbine 13, decompresses and expands, and flows out from the turbine 13 to the working medium steam main path L <b> 1. Due to the rotation of the turbine 13, the generator 18 is rotated and driven to generate power. The low-pressure working medium vapor 101 flowing out of the turbine 13 exchanges heat with the cooling medium 110 introduced into the condenser (or condenser) 14 to cool and condense into the working medium liquid 102. The working medium liquid 102 condensed by the condenser 14 flows into the medium circulation pump 15 through the working medium liquid main path L2 and is pressurized to become the high pressure working medium liquid 102, and again through the working medium liquid main path L2. It is supplied to the steam generator 11.

As the working medium circulating through the working medium vapor main path L1 and the working medium liquid main path L2 of the exhaust heat power generation apparatus having the above configuration, various media such as chlorofluorocarbon, water, ammonia, hydrocarbons, carbon dioxide gas, alcohols and the like are used. Can be used. The cooling medium 110 used in the condenser 14 may be cooling water that is cooled by a cooling tower or the like and circulated and used by a cooling water pump, cooling water that is used only once, such as river water, seawater, or well water, or a blower. Cooling air, LNG and other exhaust heat. The electric power generated by the exhaust heat power generation apparatus is supplied to a commercial power system (not shown) by combining the voltage, frequency, and waveform via the system linkage apparatus.
JP 2000-110514 A Special table 2001-525512 gazette

  In the exhaust heat power generation device having the above configuration, when the upper commercial power system fails, the exhaust heat power generation device is overloaded, or conversely, the turbine 13 is over-rotated. Must be disconnected from the commercial power system and the turbine generator 10 must be stopped. In order to stop the operation of the turbine generator 10, a power source for driving auxiliary machinery such as closing the electric steam stop valve 16 is necessary. During normal operation, auxiliary machinery such as the electric steam stop valve 16 is driven using the power of the commercial power system and the power generation device linked to the commercial power system. However, when the upper commercial power system has a power failure, the exhaust heat power generation apparatus is disconnected from the commercial power system, and thus the commercial power system cannot be used as a power source.

  On the other hand, in this type of exhaust heat power generation apparatus, the exhaust medium and heating exhaust heat medium (hot water or the like) 100 has the ability to generate working medium vapor by residual preheating even in the event of a power failure. This turbine generator can supply driving power to the auxiliary machinery immediately after a power failure occurs in the commercial power system and disconnection. However, when the electric steam stop valve 16 is closed using the power generated by the turbine generator as a power source, the electric steam stop valve 16 is supplied to the turbine 13 as the closing operation proceeds, that is, as the valve opening decreases. Therefore, the electric power necessary for closing the electric steam stop valve 16 cannot be supplied and the electric steam stop valve 16 is fully closed. The closing operation stops before

  Therefore, the working medium steam 101 is continuously supplied from the slightly opened electric steam stop valve 16 to the turbine 13, and the supply of electric power is stopped without stopping the turbine 13, so that the bearing 25 is also lubricated. No control is required. The generator 18 continues to rotate in a dangerous state in which there is a high possibility of damage to the bearing 25 or breakage of the rotating body.

  In order not to fall into such a state, in general, the electric steam stop valve 16 is provided with a backup power source such as a battery or a condenser, and the electric steam stop valve 16 is utilized by using the power of the backup power source in the event of a power failure in the commercial power system. In addition, the electric steam stop valve 16 is provided with a self-closing mechanism using mechanical power such as a spring return so that the electric steam stop valve 16 can be closed by itself when a power failure occurs.

  However, a self-closing mechanism using a backup power source or mechanical power such as a spring return causes a large cost increase. In particular, in a small-capacity exhaust heat power generation apparatus, the proportion of the influence of the cost increase in the exhaust heat power generation apparatus main body cost increases, and the economic effect of the exhaust heat power generation apparatus is greatly impaired.

  The present invention has been made in view of the above-described points, and when an upper commercial power system that is linked is out of power, even when electric power for driving auxiliary machinery cannot be obtained from the commercial power system, the electric steam stop valve It is an object of the present invention to provide an exhaust heat power generation apparatus including an inexpensive electric steam stop valve closing means capable of quickly and completely closing the engine.

  In order to solve the above problems, the invention described in claim 1 includes a steam generator, an electric steam stop valve, a turbine generator, a condenser, and a medium circulation pump, and introduces exhaust heat as a heat source into the steam generator. The working medium led from the condenser to the steam generator is heated and evaporated by the medium circulation pump, and the generated working medium vapor is led to the turbine of the turbine generator through the electric steam stop valve to drive the generator. In the exhaust heat power generation apparatus linked to the upper power system configured to return the working medium vapor discharged from the turbine to the condenser, an electric steam stop valve bypass path for bypassing the electric steam stop valve is provided, A bypass valve is provided in the electric steam stop valve bypass path, and when a power failure occurs in the upper power system, the working medium steam is supplied to the turbine through the bypass valve. It drives its generator leads to electric turbine performs closing operation of said at electric power generated by the generator motor steam stop valve, and wherein the bypass valve closed after the closed operation is completed.

  The invention according to claim 2 is the exhaust heat power generator according to claim 1, wherein the bypass valve is an electromagnetic valve that opens when power is turned on and closes when power is turned off.

  According to a third aspect of the present invention, in the exhaust heat power generation device according to the first or second aspect, the pipe diameter of the electric steam stop valve bypass path and the capacity of the bypass valve are determined by the power for closing the electric steam stop valve. The working medium steam flow rate required for the turbine generator to generate electric power that can supply the power obtained by adding the motive power for driving the lubricating oil pump that sends lubricating oil to the turbine generator can be supplied to the turbine of the turbine generator. It is characterized by a caliber and a capacity.

  According to a fourth aspect of the present invention, in the exhaust heat power generation apparatus according to the first or second aspect, the pipe diameter of the electric steam stop valve bypass path and the capacity of the bypass valve are determined by the power for closing the electric steam stop valve. The operation required for the turbine generator to generate electric power that can cover the power that maintains the opening operation of the bypass valve and the power that drives the lubricating oil pump that sends lubricating oil to the turbine generator It is the diameter and capacity | capacitance which can supply a medium vapor | steam flow volume to the turbine of this turbine generator.

  According to the first aspect of the present invention, when the electric steam stop valve bypass path for bypassing the electric steam stop valve is provided, the bypass valve is provided in the electric steam stop valve bypass path, and a power failure occurs in the upper power system In addition, the working medium steam is guided to the turbine of the turbine generator through the bypass valve, the generator is driven, the electric steam stop valve is closed with the electric power generated by the generator, and the bypass valve is turned on after the closing operation is completed. Because it closes, the electric steam stop valve bypass path and bypass valve are simply and inexpensively configured, and when the exhaust heat power generator is disconnected in the event of a power failure in the host power system, the electric steam stop valve is quickly closed completely. Thus, the exhaust heat power generation apparatus capable of stopping the turbine generator can be provided.

  According to the invention described in claim 2, since the bypass valve is an electromagnetic valve that opens when the power is turned on and closes when the power is shut off, the turbine generator generates power even if the device is disconnected at the time of power failure of the host power system. Therefore, the opening operation of the bypass valve is maintained by the amount of electricity, the working medium steam is continuously supplied to the turbine of the turbine generator, and the electric steam stop valve is quickly and completely closed by the electric power generated by the generator. it can. When the power supply of the bypass valve including the electromagnetic valve is shut off after the closing, the bypass valve is closed and the supply of the working medium vapor to the turbine is stopped.

  According to the third aspect of the present invention, the pipe diameter of the electric steam stop valve bypass path and the capacity of the bypass valve drive the lubricating oil pump that sends the lubricant to the turbine generator with the power to close the electric steam stop valve. The diameter and capacity of the working medium steam flow required for the turbine generator to generate the power that can supply the power added to the power is the diameter and capacity that can be supplied to the turbine of the turbine generator. In this case, the power generated by the generator of the turbine generator can cover the power until the electric steam stop valve is completely closed and the drive power of the lubricating oil pump, and the turbine generator can be stopped quickly and Supply of lubricating oil to the bearing can also be secured.

  According to the invention described in claim 4, the pipe diameter of the electric steam stop valve bypass path and the capacity of the bypass valve are determined by the power for closing the electric steam stop valve, the power for maintaining the opening operation of the bypass valve, and the A diameter capable of supplying the turbine medium of the turbine generator with the working medium steam flow rate necessary for the turbine generator to generate electric power that can supply the power obtained by adding the power for driving the lubricating oil pump that sends the lubricating oil to the turbine generator. Therefore, when the equipment is disconnected in the event of a power failure in the host power system, the power generated by the generator of the turbine generator is used to maintain the power until the electric steam stop valve is fully closed and the opening operation of the bypass valve. It is possible to cover the power to drive and the driving power of the lubricating oil pump, the turbine generator can be stopped quickly, and the supply of lubricating oil to the bearing until the stop can be ensured.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a diagram showing a configuration example of the exhaust heat power generator according to the present invention. 2, the same reference numerals as those in FIG. 1 denote the same or corresponding parts. This exhaust heat power generation apparatus includes a steam generator 11, a gas-liquid separator 12, a turbine generator 10, a condenser 14, and a medium circulation pump 15. The working medium steam 101 generated by the steam generator 11 is mainly used as a working medium steam. It is led to the gas-liquid separator 12 through the path L1, and the working medium droplets entrained by the gas-liquid separator 12 are separated and removed, and the electric steam stop valve 16 and the steam control valve 17 provided in the working medium steam main path L1 are passed through. 1 is the same as the exhaust heat power generator of FIG. 1 in that the generator 18 is rotated and driven by rotating the turbine 13 and rotating and driving the turbine 13 to generate power.

  Further, the low-pressure working medium steam 101 flowing out from the turbine 13 to the working medium steam main path L1 is introduced into the condenser (or condenser) 14 and exchanges heat with the cooling medium 110 to be cooled and condensed to operate. The liquid medium 102 becomes a medium liquid 102, and the working medium liquid 102 flows into the medium circulation pump 15 through the working medium liquid main path L2 and is pressurized to become the high-pressure working medium liquid 102, and again passes through the working medium liquid main path L2. The point supplied to the generator 11 is also the same as that of the exhaust heat power generator of FIG. That is, this exhaust heat power generation apparatus employs the same closed system as in FIG.

  In the present exhaust heat power generator, an electric steam stop valve bypass path L4 that bypasses the electric steam stop valve 16 and the steam control valve 17 is provided, and a bypass valve 20 is provided in the electric steam stop valve bypass path L4. Further, at the time of start-up, in order to enable stable operation of the turbine generator 10, the turbine 13 and the condenser 14 are connected by branching from the working medium steam main path L <b> 1 connecting the steam generator 11 and the gas-liquid separator 12. A turbine bypass working medium steam path L5 joining the working medium steam main path L1 is provided, and a turbine bypass valve 21 is provided in the turbine bypass working medium steam path L5.

  Further, a heat recovery device 22 and a preheater 23 are provided in the working medium liquid main path L2 connecting the medium circulation pump 15 and the steam generator 11. On the heating side of the heat recovery unit 22, the working medium liquid 102 sent from the condenser 14 to the steam generator 11 passes through the working medium liquid 102 returning from the gas-liquid separator 12 through the working medium liquid return path L 3 to the condenser 14. Is recovered by heating. An opening / closing valve 24 is provided in the working medium liquid return path L3. On the heating side of the preheater 23, the working medium liquid 102 sent to the steam generator 11 is preheated through the exhaust heat medium 100.

  Further, the lubricating oil 120 that has lubricated the bearing 25 of the generator 18 of the turbine generator 10 is recovered by the oil / medium separator 26 through the lubricating oil return path L10 and is discharged to the oil / medium separator 26. The working medium heated by the heat medium 100 and dissolved in the lubricating oil 120 is vaporized and separated. The working medium vapor 101 from which the working medium is vaporized and separated is guided to the condenser 14 through the working medium vapor path L6. The lubricating oil 120 from which the working medium in the oil / medium separator 26 is separated and removed is sent to the oil cooler 28 by the lubricating oil pump 27. The lubricating oil 120 cooled by the cooler 28 is supplied to the bearing 25 of the generator 18 through the lubricating oil supply path L11. The oil cooler 28 is supplied with the working medium liquid 102 via the on-off valve 29 from the working medium liquid path L7 through which the working medium liquid 102 pressurized by the medium circulation pump 15 passes, and cools the lubricating oil 120 as a cooling medium. is doing. Thereby, the lubricating oil 120 is supplied to the bearing 25 as a lubricating oil having a predetermined viscosity at a predetermined temperature. Further, the working medium liquid 102 passing through the working medium liquid path L7 is supplied to the generator 18 as a cooling medium to cool the generator 18.

  The bypass valve 20 provided in the electric steam stop valve bypass path L4 is an automatic valve that is closed by itself when the power is shut off. A power failure occurs in a higher-level commercial power system (not shown) with which the present exhaust heat power generator is linked, the present exhaust heat power generator is disconnected from the commercial power system, and the turbine 13 is closed by the electric steam stop valve 16. , The bypass valve 20 is opened, the working medium steam 101 is supplied to the turbine 13 via the electric steam stop valve bypass path L4, and the turbine 13 is continuously rotated and driven to rotate the generator 18. -It is made to drive, electric power generation is continued, and the electric steam stop valve 16 can be fully closed using the electric power. The bypass valve 20 may be opened when a power failure occurs, or may be opened after normal operation. As the bypass valve 20, it is preferable to use an electromagnetic valve that opens when the power is turned on and closes by itself when the power is turned off because the opening / closing time is short and the cost is low.

  When the electric electric steam stop valve 16 is fully closed, the power supply of the bypass valve 20 is shut off (power supply is stopped), so that the bypass valve 20 is closed by itself and the working medium vapor is supplied to the turbine 13. And the turbine 13 can be safely stopped.

  The pipe diameter of the electric steam stop valve bypass path L4 and the capacity (Cv value) of the bypass valve 20 are such that the power of the generator 18 of the turbine generator 10 until the electric steam stop valve 16 is completely closed opens the bypass valve 20. What is necessary is just to set so that the working medium vapor | steam 101 of the flow volume required in order to generate | occur | produce the electric power which can cover the motive power which added the motive power which maintains operation | movement can be supplied to the turbine 13. The power until the electric steam stop valve 16 is completely closed and the power for maintaining the opening operation of the bypass valve 20 (in this example, 0.2 kW) are minute relative to the power generation capacity of the generator 18 (in this example, 20 kW). Therefore, the pipe diameter of the electric steam stop valve bypass path L4 and the capacity of the bypass valve 20 are extremely smaller than the pipe diameter of the working medium steam main path L1 and the capacity of the electric steam stop valve 16, respectively (flow rate ratio). 1%, and the pipe diameter ratio is 10%). Therefore, it is possible to greatly reduce the cost of countermeasure facilities in the event of a power failure in the commercial power system.

  Further, based on the power obtained by adding the power for driving the lubricating oil pump 27 in addition to the power for closing the electric steam stop valve 16 and the power for maintaining the opening operation of the bypass valve 20 (including the control power supply for the bypass valve). By determining the pipe diameter of the electric steam stop valve bypass path L4 and the capacity (Cv value) of the bypass valve, it is possible to improve safety when the turbine 13 is stopped. Furthermore, in order to stop the turbine 13 rapidly, when the generator 18 is braked by applying an electric load such as an electric heater, the power for closing the electric steam stop valve 16 and the power for maintaining the opening operation of the bypass valve 20 are maintained. In addition, it is possible to shorten the turbine stop time by determining the pipe diameter of the electric steam stop valve bypass path L4 and the capacity of the bypass valve 20 in consideration of the control power source of the electric load.

  To determine when the bypass valve 20 is closed, that is, when the electric steam stop valve 16 is fully closed, a method of confirming whether the electric steam stop valve 16 is fully closed with a limit switch, or the electric steam stop valve 16 is fully open. The time required from the start of the closing operation to the full closing (may include a surplus time) is set in the timer, and the set time has elapsed since the start of the closing operation of the electric steam stop valve 16 For example, it may be determined that the electric steam stop valve 16 is fully closed at the time. For example, when a limit switch whose contact is opened when the electric steam stop valve 16 is fully closed is inserted and connected in series to the power supply circuit of the bypass valve 20, the electric steam stop valve 16 is fully closed and the bypass valve 20 is closed. The power is shut off and the bypass valve 20 is closed. Further, the limit switch method and the timer method can be used in combination with an AND circuit or an OR circuit.

  In the exhaust heat power generator, the electric steam stop valve 16 is provided on the upstream side of the working medium steam main path L1 from the steam control valve 17, but may be provided on the downstream side. Further, the electric steam stop valve 16 and the steam control valve 17 may be used in combination as an electric steam stop valve / steam control valve. In this case, the electric steam stop valve bypass path L4 is provided so as to bypass the electric steam stop valve / steam control valve. There is also a method of providing a bypass path that bypasses both the electric steam stop valve 16 and the turbine 13 and providing a power generation by providing a small-capacity sub-turbine generator in the bypass path to take measures against a power failure in the commercial power system. However, the cost increases because the turbine and the generator are duplicated.

  A small electric valve with a spring turn function can be used as the bypass valve 20 in place of the solenoid valve, but it is generally more expensive than the solenoid valve. However, when the required valve capacity (Cv value) is large, it may be more advantageous than the solenoid valve. Further, even when using a small motor-operated valve with a spring turn function, the diameter and the capacity are much smaller than that of the electric steam stop valve 16, and there is a cost merit. (However, the solenoid valve also has a spring inside and can be said to be a kind of spring turn.)

  A small backup power source or an electric valve with a small backup power source can be used as the bypass valve 20 instead of the electromagnetic valve as the bypass valve 20, but it is generally more expensive than the electromagnetic valve. However, when the required valve capacity is large, it may be more advantageous than the solenoid valve. Even when using a small motor-operated valve with a backup power source, the diameter and capacity of the motor-operated steam stop valve 16 are much smaller than that of the electric steam stop valve 16, which is advantageous in terms of cost. However, since a rechargeable battery, which is a general backup power supply, has a lifetime, it is disadvantageous in terms of reliability and maintenance.

  The electric power generated by the generator 18 of the turbine generator 10 may be used for power failure countermeasures while being AC, or converted to DC using an AC / DC converter (converter) 30 as shown in FIG. Then you may use it. Further, a DC / AC converter (inverter) 31 is used to convert the alternating current to a predetermined frequency and voltage and then supplied to the control device (AC200V) 32. The control device 32 uses the electric steam stop valve 16, the lubricating oil pump 27, etc. The auxiliary machine may be driven and controlled. Here, the voltage required for driving the auxiliary machine is always 400 V (AC) and at least 375 V (AC). Reference numeral 33 denotes a switch for linking / disconnecting the exhaust heat power generator to / from the commercial power system 40.

  Further, as shown in FIG. 4, the control system has a DC low voltage (for example, DC 24 V) specification, and the electric power generated by the generator 18 of the turbine generator 10 is converted into DC using an AC / DC converter 30. In addition, the DC voltage converter (so-called DC-DC converter) 35 converts the electric power into a lower DC voltage (DC 24V), and the DC / AC converter (inverter) 31 converts the electric power into an AC having a predetermined frequency and voltage. Then, the electric power may be converted into electric power of a lower DC voltage (DC24V) by the AC / DC converter 34 and supplied to the control device (DC24V). The control device 36 may drive and control auxiliary machines such as the electric steam stop valve 16 and the lubricating oil pump 27 with a low DC voltage. Thus, even if the rotational speed of the generator 18 is lowered and the voltage is lowered by lowering the drive power supply of the auxiliary machines such as the electric steam stop valve 16 and the lubricating oil pump 27, the DC voltage converter 34 It can be converted into low voltage DC power and supplied to the controller 36. For example, only the auxiliary equipment required at the time of a power failure can be set to low voltage specifications.

  Further, by using a booster circuit instead of the DC voltage converter 34 of FIG. 4, even if the rotation speed of the generator 18 decreases and the voltage decreases, the booster circuit boosts the voltage and supplies it to the control device (AC200V). You may do it.

  By increasing the pipe diameter of the electric steam stop valve bypass path L4 and the capacity (Cv value) of the bypass valve 20, the auxiliary equipment of the exhaust heat power generator that can be used in the event of a power failure can be increased, and the power failure can be made more safely It becomes possible to take measures against time. However, if the piping diameter of the electric steam stop valve bypass path L4 and the capacity (Cv value) of the bypass valve 20 are increased in order to increase the number of auxiliary machines to be used, the cost advantage is reduced.

  Actually, the pipe diameter of the electric steam stop valve bypass path L4 and the capacity (Cv value) of the bypass valve 20 are not arbitrarily selected, but are selected from commercially available ones. And if there is enough capacity, you can increase the number of auxiliary equipment used in the event of a power failure.

  A method is also conceivable in which the residual preheating of the working medium is used to generate power using a heat exchange element in the steam generator 11 and the like, and the power is used to take measures against power failure, but the electric steam stop valve bypass path L4 It is considered that the method according to is advantageous in terms of cost.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea described in the claims, the specification, and the drawings. Is possible. It should be noted that any shape, structure, and material not directly described in the specification and drawings are within the scope of the technical idea of the present invention as long as the effects and advantages of the present invention are exhibited. For example, the specific configuration of the exhaust heat power generator is not limited to that shown in the above embodiment, and other configurations can be adopted as appropriate as long as they are within the scope of the present invention. Moreover, although the example which uses warm water as a heating source of a steam generator was shown in the said example of an embodiment, a heating source is not limited to warm water, Other waste heat media may be sufficient.

It is a figure which shows the basic structural example of an exhaust heat power generator. It is a figure which shows the structural example of the waste heat power generator which concerns on this invention. It is a figure explaining the case where auxiliary machinery is driven by alternating current power with the exhaust heat power generator concerning the present invention. It is a figure explaining the case where auxiliary machinery is driven by alternating current power with the exhaust heat power generator concerning the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Turbine generator 11 Steam generator 12 Gas-liquid separator 13 Turbine 14 Condenser 15 Medium circulation pump 16 Electric steam stop valve 17 Steam control valve 18 Generator 20 Bypass valve 21 Turbine bypass valve 22 Heat recovery device 23 Preheater 24 Opening and closing Valve 25 Bearing 26 Oil / medium separator 27 Lubricating oil pump 28 Oil cooler 29 On-off valve 30 AC / DC converter (converter)
31 DC / AC converter (inverter)
32 Control device (AC200V)
33 Switch 34 DC voltage converter (DC-DC converter)
35 AC / DC converter (converter)
36 Control device (DC24V)
L1 Working medium steam main path L2 Working medium liquid main path L3 Working medium liquid return path L4 Electric steam stop valve bypass path L5 Turbine bypass working medium steam path L6 Working medium steam path L7 Working medium liquid path L10 Lubricating oil return path L11 Lubricating oil Supply route

Claims (4)

A steam generator, an electric steam stop valve, a turbine generator, a condenser, and a medium circulation pump are provided. Exhaust heat is introduced into the steam generator as a heat source, and is led from the condenser to the steam generator by the medium circulation pump. The working medium vapor is heated and evaporated, and the generated working medium vapor is led to the turbine of the turbine generator through the electric steam stop valve to drive the generator, and the working medium vapor discharged from the turbine is fed to the condenser. In the exhaust heat power generator linked to the upper power system configured to return,
An electric steam stop valve bypass path for bypassing the electric steam stop valve is provided, and a bypass valve is provided in the electric steam stop valve bypass path,
When a power failure occurs in the upper power system, the working medium steam is guided to the turbine of the turbine generator through the bypass valve to drive the generator, and the electric steam stop valve is driven by the electric power generated by the generator. An exhaust heat power generation apparatus that performs a closing operation and closes the bypass valve after the closing operation is completed. The exhaust heat power generator according to claim 1,
The exhaust heat generator according to claim 1, wherein the bypass valve is an electromagnetic valve that opens when power is turned on and closes when power is turned off. The exhaust heat power generator according to claim 1 or 2,
The pipe diameter of the electric steam stop valve bypass path and the capacity of the bypass valve are electric power that can cover the power that closes the electric steam stop valve plus the power that drives the lubricating oil pump that sends lubricating oil to the turbine generator. An exhaust heat power generator having a diameter and a capacity capable of supplying the working medium vapor flow rate necessary for generating power to the turbine of the turbine generator. The exhaust heat power generator according to claim 1 or 2,
The piping diameter of the electric steam stop valve bypass path and the capacity of the bypass valve are determined based on the power to close the electric steam stop valve, the power to maintain the opening operation of the bypass valve, and the lubrication to send lubricating oil to the turbine generator. A diameter and a capacity capable of supplying the turbine medium of the turbine generator with a flow rate of the working medium vapor necessary for the turbine generator to generate electric power that can cover the power obtained by adding the power for driving the oil pump. Waste heat power generator.

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