CN217844064U - Nuclear energy heat supply and steam supply coupling system - Google Patents
Nuclear energy heat supply and steam supply coupling system Download PDFInfo
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- CN217844064U CN217844064U CN202221965067.5U CN202221965067U CN217844064U CN 217844064 U CN217844064 U CN 217844064U CN 202221965067 U CN202221965067 U CN 202221965067U CN 217844064 U CN217844064 U CN 217844064U
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Abstract
The utility model discloses a nuclear energy heat supply and steam supply coupled system, include: a steam outlet of the steam generator is connected with a steam inlet of the high-pressure cylinder through a main steam pipe, and a first steam outlet of the high-pressure cylinder is connected with a steam inlet of the low-pressure cylinder through a high-low pressure cylinder steam communicating pipe; the steam inlet of the first steam-water heat exchanger is connected with a second medium-temperature steam extraction pipeline, the steam outlet of the first steam-water heat exchanger is connected with the steam inlet of the steam heater through a low-temperature industrial saturated steam pipeline, and the heat supply network backwater main pipe is connected with a heat supply network circulating pump; a heating steam main pipe of the steam heater is respectively connected with the high-temperature steam extraction pipeline and the first medium-temperature steam extraction pipeline; a water inlet of the second steam-water heat exchanger is connected with a heat supply network return water main pipe; the utility model discloses a set up multistage heat exchanger to heating heat supply circuit and outer supply industry steam return circuit, improved the superheat degree that supplies vapour to external industry, increase the transport distance of outer supply industry steam by a wide margin, reduce the condensate loss of industry steam in transportation process.
Description
Technical Field
The utility model relates to a nuclear energy technical field especially relates to a nuclear energy heat supply and steam supply coupled system.
Background
Nuclear energy is one of the important pillars for satisfying energy supply and ensuring national security. Compared with clean energy sources such as photovoltaic, wind power, hydropower and the like, nuclear power has the advantages of no intermittence, less natural condition constraint and the like, and is clean energy source capable of replacing fossil energy sources on a large scale. Pressurized water reactor nuclear power plants use light water as a coolant and moderator. The system mainly comprises a nuclear steam supply system (namely a primary loop system), a steam turbine generator system (namely a secondary loop system) and other auxiliary systems. After the heat energy released by fission of the nuclear fuel is absorbed by the reactor core, the coolant transfers the heat energy to the two loops through the steam generator to generate saturated steam, and then the saturated steam enters the steam turbine to do work to drive the generator to generate electricity. The exhaust steam discharged after the steam turbine works enters a condenser, is condensed into condensed water, then passes through heat exchange equipment such as a low-pressure heater and a deaerator, and enters a steam generator to absorb heat of a primary loop to generate new steam, and the steam circulation of a two-loop system is completed.
The urban central heating system in China is a large household burning coal and is one of main sources of air pollution, so that the popularization and application of green low-carbon energy in the urban central heating system is an important measure for solving the problem of air pollution. Meanwhile, with the continuous increase of industrial parks in various regions, the demands of industrial enterprises on high-temperature and high-pressure steam are also continuously increased.
With the development of nuclear reactor safety technology, nuclear energy is used as clean and efficient clean energy, and has unique superiority and great application potential in the aspects of central heating and industrial steam supply. However, the current nuclear power main machine type in China mainly uses a pressurized water reactor, the generated steam is generally medium-high temperature saturated steam, the distance between a nuclear power plant and a hot user is generally long, the saturated steam can generate a large amount of condensed water in a pipeline in the long-distance conveying process, the quality loss in the pipeline is greatly increased, and safety accidents such as water hammer and the like can be caused after the condensed water is gathered, so that the commercial popularization of the nuclear power plant in the aspect of supplying industrial steam is greatly limited.
SUMMERY OF THE UTILITY MODEL
The utility model provides a nuclear energy heat supply and steam supply coupled system has improved the superheat degree that external industry supplied vapour, has increased the transport distance of external confession industry steam, has reduced the condensate loss of industry steam in transportation process.
According to the utility model discloses an aspect provides a nuclear energy heat supply and steam supply coupled system, include:
the system comprises a steam generator, a high-pressure cylinder, a low-pressure cylinder, a first steam-water heat exchanger, a steam heater, a heat supply network circulating pump and a second steam-water heat exchanger;
a steam outlet of the steam generator is connected with a steam inlet of the high-pressure cylinder through a main steam pipe, and a first steam outlet of the high-pressure cylinder is connected with a steam inlet of the low-pressure cylinder through a high-low pressure cylinder steam communicating pipe;
the steam inlet of the first steam-water heat exchanger is connected with a second intermediate-temperature steam extraction pipeline, the second intermediate-temperature steam extraction pipeline is connected with a high-low pressure cylinder steam communicating pipe, and the steam outlet of the first steam-water heat exchanger is connected with the steam inlet of the steam heater through a low-temperature industrial saturated steam pipeline; a water inlet of the first steam-water heat exchanger is connected with a heat supply network backwater main pipe through a first steam-water heat exchanger water inlet pipe, the heat supply network backwater main pipe is connected with a heat supply network circulating pump, and the heat supply network circulating pump is used for introducing heat supply network backwater into the heat supply network backwater main pipe; the water outlet of the first steam-water heat exchanger is connected with a heat supply network backwater main pipe through a water outlet pipe of the first steam-water heat exchanger;
a heating steam main pipe of the steam heater is respectively connected with a high-temperature steam extraction pipeline and a first medium-temperature steam extraction pipeline, wherein the first medium-temperature steam extraction pipeline is connected with a high-low pressure cylinder steam communicating pipe, and the high-temperature steam extraction pipeline is connected with a main steam pipe; the steam supply port of the steam heater is connected with an external superheated steam supply pipeline;
a water inlet of the second steam-water heat exchanger is connected with a heat supply network water return main pipe, a steam inlet of the second steam-water heat exchanger is connected with a second medium-temperature steam extraction pipeline through a heat supply network water heating steam pipeline, and a water outlet of the second steam-water heat exchanger is connected with a heat supply network water supply main pipe;
the first steam-water heat exchanger is used for cooling the medium-temperature saturated steam introduced from the second medium-temperature steam extraction pipeline through the heat supply network backwater introduced from the heat supply network backwater main pipe, converting the medium-temperature saturated steam into low-temperature saturated steam, and inputting the low-temperature saturated steam into the steam heater through the low-temperature industrial saturated steam pipeline;
the steam heater is used for heating low-temperature saturated steam through high-temperature saturated steam, converting the low-temperature saturated steam into superheated steam, and supplying the superheated steam to a steam user through an external supply superheated steam pipeline; the high-temperature saturated steam used for heating the low-temperature saturated steam in the steam heater is formed by mixing high-temperature high-pressure saturated steam led from a high-temperature steam extraction pipeline and medium-temperature medium-pressure saturated steam led from a high-low pressure cylinder steam communicating pipe;
the second steam-water heat exchanger is used for receiving the heated return water of the heat supply network in the first steam-water heat exchanger, heating the return water of the heat supply network through the medium-temperature saturated steam introduced by the steam pipeline for heating the water of the heat supply network, and leading the heated water of the heat supply network to a heat supply user through the water supply main pipe of the heat supply network.
Optionally, the nuclear energy heat supply and steam supply coupled system further includes:
a condensed water treatment device and a heat supply condensed water pump;
a first condensed water pipeline of the first steam-water heat exchanger and a second condensed water pipeline of the second steam-water heat exchanger are both connected with an inlet of a heat supply condensed water pump, and an outlet of the heat supply condensed water pump is connected with an inlet of a condensed water treatment device;
the heat supply condensate pump is used for pumping condensate water discharged by the first steam-water heat exchanger and the second steam-water heat exchanger into the condensate water treatment device;
the outlet of the condensed water treatment device is connected with the inlet of the steam generator, and the condensed water treatment device is used for deoxidizing and heating the condensed water and then introducing the deoxidized condensed water into the steam generator.
Optionally, the condensed water treatment device comprises a condenser, a condensed water pump, a low-pressure heater, a deaerator, a water feed pump and a high-pressure heater;
a first inlet of the deaerator is connected with an outlet of the heat supply condensed water pump and a first outlet of the low-pressure heater, a second inlet of the deaerator is connected with a second steam outlet of the high-pressure cylinder, a third inlet of the deaerator is connected with a second outlet of the low-pressure heater, and an outlet of the deaerator is connected with an inlet of the water supply pump;
the outlet of the feed water pump is connected with the first inlet of the high-pressure heater;
a second inlet of the high-pressure heater is connected with a third steam outlet of the high-pressure cylinder, a first outlet of the high-pressure heater is connected with an inlet of the steam generator, and a second outlet of the high-pressure heater is connected with a fourth inlet of the deaerator;
a first steam outlet of the low-pressure cylinder is connected with a first inlet of the low-pressure heater, and a second steam outlet is connected with an inlet of the condenser;
the outlet of the condenser is connected with the inlet of the condensate pump, and the touch of the condensate pump is connected with the second inlet of the low-pressure heater.
Optionally, the steam exhaust pipe of the steam heater is connected with the heat supply network water heating steam pipeline;
or a steam exhaust pipe of the steam heater is connected with the deaerator, and steam exhausted by the steam heater is used for heating condensed water entering the deaerator.
Optionally, the water inlet of the first steam-water heat exchanger is connected with the outlet of the condensate pump;
the water outlet of the first steam-water heat exchanger is connected with the inlet of the low-pressure heater, or the water outlet of the first steam-water heat exchanger is connected with the fifth inlet of the deaerator.
Optionally, a steam inlet of the first steam-water heat exchanger is connected with a second medium-temperature steam extraction pipeline through a medium-temperature industrial saturated steam pipeline;
a first regulating valve V is arranged on the high-temperature steam extraction pipeline, a second regulating valve is arranged on the first medium-temperature steam extraction pipeline, a third regulating valve is arranged on the medium-temperature industrial saturated steam pipeline, a fourth regulating valve is arranged on the heat supply network water heating steam pipeline, a fifth regulating valve is arranged on the water inlet pipe of the first steam-water heat exchanger, and a sixth regulating valve is arranged on the heat supply network water return main pipe;
the system also includes a controller for adjusting the opening of each of the regulating valves.
Optionally, a first pressure sensor and a first temperature sensor are arranged on the medium-temperature industrial saturated steam pipeline;
a second pressure sensor and a second temperature sensor are arranged on the low-temperature industrial saturated steam pipeline;
a third pressure sensor, a third temperature sensor and a first flow sensor are arranged on the external supply hot steam pipeline;
the controller is also used for adjusting the opening degree of at least one of the first regulating valve, the second regulating valve, the third regulating valve and the fifth regulating valve according to the detection values of the first pressure sensor, the first temperature sensor, the second pressure sensor, the second temperature sensor, the third pressure sensor, the third temperature sensor and the first flow sensor;
a fourth pressure sensor, a fourth temperature sensor and a second flow sensor are arranged on the heat supply network water supply main pipe;
a fifth pressure sensor, a fifth temperature sensor and a third flow sensor are arranged on the heat supply network backwater main pipe;
the controller is also used for adjusting the opening degree of at least one of the fourth regulating valve and the sixth regulating valve according to the detection values of the fourth pressure sensor, the fourth temperature sensor, the second flow sensor, the fifth pressure sensor, the fifth temperature sensor and the third flow sensor.
Optionally, the controller is further configured to adjust an opening degree of at least one of the first regulating valve and the fifth regulating valve according to the user-side steam temperature measurement value, the user-side hot temperature target value, and the user-side steam pressure.
Optionally, radiation monitoring instruments are arranged on the external superheated steam supply pipeline, the heat supply network water return main pipe and the heat supply network water supply main pipe;
a first shutoff valve is arranged on the heat supply network water return main pipe, and a second shutoff valve is arranged on the heat supply network water supply main pipe;
the radiation monitoring instrument is used for monitoring the radiation dose level of the medium in the pipe in real time;
the controller is used for closing the third regulating valve when the radiation dose level of the external supply superheated steam pipeline is greater than a preset value, closing the first shut-off valve when the radiation dose level of the heat supply network water return main pipe is greater than the preset value, and closing the second shut-off valve when the radiation dose level of the heat supply network water supply main pipe is greater than the preset value.
Optionally, a heat supply network backwater treatment device is arranged on the water inlet side of the heat supply network circulating pump, and the heat supply network backwater treatment device is used for performing decontamination, filtration, purification and deoxidization treatment on the heat supply network backwater;
a constant-pressure water replenishing device is arranged on the heat supply network backwater main pipe;
the first steam-water heat exchanger, the steam heater and the second steam-water heat exchanger are in the structural types of shell-and-tube type, plate type, spiral plate type, tube type or heat pipe type.
According to the technical scheme, steam generated by the steam generator enters the high-pressure cylinder through the main steam pipe, steam flowing out of the high-pressure cylinder enters the low-pressure cylinder through the high-low pressure cylinder steam communicating pipe, steam in the high-low pressure cylinder steam communicating pipe also enters the first steam-water heat exchanger through the second medium-temperature steam extraction pipeline, the first steam-water heat exchanger can utilize partial heat supply network backwater of the heat supply network backwater main pipe to cool medium-temperature saturated steam in the second medium-temperature steam extraction pipeline, the medium-temperature saturated steam is changed into low-temperature saturated steam, the low-temperature saturated steam flows into the steam heater through the low-temperature industrial saturated steam pipeline, the steam is heated by the high-temperature saturated steam, and then the superheated steam is changed into superheated steam and is supplied to a steam user through the external superheated steam supply pipeline. And a part of the heat supply network backwater is communicated with the first steam-water heat exchanger through a first steam-water heat exchanger water inlet pipe under the action of the heat supply network circulating pump, the heat supply network backwater heated in the first steam-water heat exchanger is converged into the heat supply network backwater main pipe through a first steam-water heat exchanger water outlet pipe and flows into the second steam-water heat exchanger, the heated heat supply network backwater is heated through medium-temperature saturated steam introduced by the heat supply network water heating steam pipeline, and finally, the heated heat supply network water is guided to a heat supply user through the heat supply network water supply main pipe. The embodiment of the utility model provides a through setting up multistage heat exchanger, the middle temperature saturated steam of original direct external supply dehumidifies through condensation earlier then heaies up again, has improved the superheat degree of external industry confession vapour greatly to can increase the transport distance of external supply industry vapour by a wide margin, and reduce the condensate loss of industry vapour in transportation process. The heat recovered in the process of condensing the medium-temperature saturated steam is used for heating return water or condensed water of a heat supply network, and energy loss can not be caused.
It should be understood that the statements in this section are not intended to identify key or critical features of the embodiments of the present invention, nor are they intended to limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained without creative efforts.
Fig. 1 is a schematic structural diagram of a nuclear power heating and steam supply coupling system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another nuclear energy heating and steam supply coupling system according to an embodiment of the present invention.
Reference numerals are as follows:
1-a steam generator; 2-high pressure cylinder; 3-a low pressure cylinder; 4-a generator; 5-a condenser; 6-a condensate pump; 7-a low pressure heater; 8-a deaerator; 9-a water supply pump; 10-a high pressure heater; 11-a first vapour-water heat exchanger; 12-a steam heater; 13-heat supply network circulation pump; 14-a second vapour-water heat exchanger; 15-heat supply condensate pump; 16-condensed water treatment device. 101-main steam pipe; 102-high-temperature steam extraction pipeline; 201-high and low pressure cylinder steam communicating pipe; 202-a first medium temperature steam extraction pipeline; 203-heating a steam main pipe; 204-a steam exhaust pipe; 301-a second medium temperature steam extraction pipeline; 302-medium temperature industrial saturated steam pipeline; 303-low temperature industrial saturated steam pipeline; 304-an external supply superheated steam pipeline;
305-heat supply network water heating steam pipeline; 306-a second condensate line; 307-a first condensate line; 501-a heat supply network backwater main pipe; 502-a first steam-water heat exchanger water inlet pipe; 503-a water outlet pipe of the first steam-water heat exchanger; 504-heat supply network water supply main pipe.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a schematic structural diagram of a nuclear energy heat supply and steam supply coupling system provided by an embodiment of the present invention, and referring to fig. 1, the nuclear energy heat supply and steam supply coupling system includes: the system comprises a steam generator 1, a high-pressure cylinder 2, a low-pressure cylinder 3, a first steam-water heat exchanger 11, a steam heater 12, a heat supply network circulating pump 13 and a second steam-water heat exchanger 14; the steam outlet of the steam generator 1 is connected with the steam inlet of the high pressure cylinder 2 through the main steam pipe 101, and the first steam outlet of the high pressure cylinder 2 is connected with the steam inlet of the low pressure cylinder 3 through the high and low pressure cylinder steam communicating pipe 201.
A steam inlet of the first steam-water heat exchanger 11 is connected with a second intermediate-temperature steam extraction pipeline 301, the second intermediate-temperature steam extraction pipeline 301 is connected with a high-low pressure cylinder steam communicating pipe 201, and a steam outlet of the first steam-water heat exchanger 11 is connected with a steam inlet of the steam heater 12 through a low-temperature industrial saturated steam pipeline 303; a water inlet of the first steam-water heat exchanger 11 is connected with a heat supply network backwater main pipe 501 through a first steam-water heat exchanger water inlet pipe 502, the heat supply network backwater main pipe 501 is connected with a heat supply network circulating pump 13, and the heat supply network circulating pump 13 is used for introducing heat supply network backwater into the heat supply network backwater main pipe 501; the water outlet of the first steam-water heat exchanger 11 is connected with a heat supply network backwater main pipe 501 through a first steam-water heat exchanger water outlet pipe 503.
A heating steam main pipe 203 of the steam heater 12 is respectively connected with the high-temperature steam extraction pipeline 102 and a first medium-temperature steam extraction pipeline 202, wherein the first medium-temperature steam extraction pipeline 202 is connected with a high-low cylinder steam communicating pipe 201, and the high-temperature steam extraction pipeline 102 is connected with a main steam pipe 101; the steam supply port of the steam heater 12 is connected with an external supply superheated steam pipeline 304; the water inlet of the second steam-water heat exchanger 14 is connected with a heat supply network water return main pipe 501, the steam inlet of the second steam-water heat exchanger 14 is connected with a second medium-temperature steam extraction pipeline 301 through a heat supply network water heating steam pipeline 305, and the water outlet of the second steam-water heat exchanger 14 is connected with a heat supply network water supply main pipe 504.
The first steam-water heat exchanger 11 is configured to cool the intermediate-temperature saturated steam introduced from the second intermediate-temperature steam extraction pipeline 301 by the heat supply network return water introduced from the heat supply network return water main pipe 501, convert the intermediate-temperature saturated steam into low-temperature saturated steam, and input the low-temperature saturated steam into the steam heater 12 through the low-temperature industrial saturated steam pipeline 303.
The steam heater 12 is configured to heat the low-temperature saturated steam with the high-temperature saturated steam, convert the low-temperature saturated steam into superheated steam, and supply the superheated steam to a steam user through an external supply superheated steam pipeline 304; wherein, the high-temperature saturated steam used for heating the low-temperature saturated steam in the steam heater 12 is formed by mixing the high-temperature high-pressure saturated steam led from the high-temperature steam extraction pipeline 102 and the medium-temperature medium-pressure saturated steam led from the high-low pressure cylinder steam communicating pipe 201; the second steam-water heat exchanger 14 is configured to receive the heated return water of the heat supply network from the first steam-water heat exchanger 11, heat the return water of the heat supply network by using the medium-temperature saturated steam introduced by the heat supply network water heating steam pipeline 305, and introduce the heated return water of the heat supply network to a heat supply user through the heat supply network water supply main pipe 504.
The first steam-water heat exchanger 11, the steam heater 12 and the second steam-water heat exchanger 14 are in the structural form of shell-and-tube type, plate type, spiral plate type, tube type or heat pipe type. The steam generator 1 is a mechanical device that heats water into steam using the heat energy of fuel or other energy source. Steam generated by the steam generator 1 enters the high-pressure cylinder 2 through the main steam pipe 101, steam flowing out of the high-pressure cylinder 2 enters the low-pressure cylinder 3 through the high-pressure cylinder steam communicating pipe 201, and the high-pressure cylinder 2 is the initial stage of steam entering the cylinder, and at the moment, the steam pressure is high, the temperature is high, so that corresponding high-pressure cylinder blades are short, and the diameter of the impeller is large. The low pressure cylinder 3 differs from the high pressure cylinder 2 in the internal pressure. The nuclear energy heat supply and steam supply coupling system further comprises a generator 4, and steam works in the high-pressure cylinder 1 and the low-pressure cylinder 3 to drive the generator 4 to generate power. Steam in the high-low pressure cylinder steam communicating pipe 201 also enters the first steam-water heat exchanger 11 through the second medium temperature steam extraction pipeline 301, the first steam-water heat exchanger 11 can utilize partial heat supply network backwater to cool medium temperature saturated steam into low temperature saturated steam, the low temperature saturated steam flows into the steam heater 12 through the low temperature industrial saturated steam pipeline 303, the steam heater 12 can utilize high temperature saturated steam to heat the low temperature industrial saturated steam, and the high temperature saturated steam is transmitted to the steam heater 12 through the heating steam main pipe 203. The heat supply network backwater of the heat supply network backwater main pipe 501 is introduced through the heat supply network circulating pump 13, and the heat supply network circulating pump 13 can overcome the resistance loss of the whole system and push the circulating water in the heat supply network so as to ensure normal heating. The heated return water of the heat supply network in the first steam-water heat exchanger 11 is converged into a return water main pipe 501 of the heat supply network through a water outlet pipe 503 of the first steam-water heat exchanger, flows into the second steam-water heat exchanger 14, is heated by the intermediate-temperature saturated steam introduced by a steam pipeline 305 for heating the heat supply network, and is finally introduced to a heat supply user through a water supply main pipe 504 of the heat supply network.
According to the technical scheme, steam generated by the steam generator 1 enters the high-pressure cylinder 2 through the main steam pipe 101, steam flowing out of the high-pressure cylinder 2 enters the low-pressure cylinder 3 through the high-low pressure cylinder steam communicating pipe 201, the steam in the high-low pressure cylinder steam communicating pipe 201 further enters the first steam-water heat exchanger 11 through the second medium-temperature steam extraction pipeline 301, the first steam-water heat exchanger 11 can utilize partial heat supply network return water of the heat supply network return water mother pipe 501 to cool medium-temperature saturated steam in the second medium-temperature steam extraction pipeline 301 to form low-temperature saturated steam, the low-temperature saturated steam flows into the steam heater 12 through the low-temperature industrial saturated steam pipeline 303, and the low-temperature saturated steam is heated to form superheated steam and is supplied to a steam user through the external supply superheated steam pipeline 304. Under the action of the heat supply network circulating pump 13, a part of heat supply network backwater of the heat supply network backwater main pipe 501 is communicated with the first steam-water heat exchanger 11 through the first steam-water heat exchanger water inlet pipe 502, the heat supply network backwater heated in the first steam-water heat exchanger 11 is converged into the heat supply network backwater main pipe 501 through the first steam-water heat exchanger water outlet pipe 503 and flows into the second steam-water heat exchanger 14, the heated heat supply network backwater is heated through the medium-temperature saturated steam introduced by the heat supply network water heating steam pipeline 305, and finally the heated heat supply network water is guided to a heat supply user through the heat supply network water supply main pipe 504. The embodiment of the utility model provides a through setting up multistage heat exchanger, the middle temperature saturated steam that directly supplies outside originally through condensation dehumidification earlier then heat up again, has improved the superheat degree that supplies vapour to external industry greatly to can increase the transport distance of supplying industrial steam outward by a wide margin, and reduce the condensate loss of industrial steam in transportation process. The heat recovered in the process of condensing the medium-temperature saturated steam is used for heating return water or condensed water of a heat supply network, and energy loss can not be caused.
Optionally, the nuclear energy heat supply and steam supply coupled system further includes: a condensate treatment device 16 and a heat supply condensate pump 15; a first condensed water pipeline 307 of the first steam-water heat exchanger 11 and a second condensed water pipeline 306 of the second steam-water heat exchanger 14 are both connected with an inlet of a heat supply condensed water pump 15, and an outlet of the heat supply condensed water pump 15 is connected with an inlet of a condensed water treatment device 16; the heat supply condensate pump 15 is used for pumping condensate discharged by the first steam-water heat exchanger 11 and the second steam-water heat exchanger 14 into the condensate treatment device 16; the outlet of the condensed water treatment device 16 is connected with the inlet of the steam generator 1, and the condensed water treatment device 16 is used for removing oxygen and heating the condensed water and then introducing the water into the steam generator.
The condensed water in the first condensed water pipeline 307 is generated after the medium temperature saturated steam introduced into the medium temperature industrial saturated steam pipeline 302 is cooled by the heat supply network backwater, the condensed water in the second condensed water pipeline 306 is generated after the medium temperature saturated steam in the heat supply network water heating steam pipeline 305 is heated by the medium temperature saturated steam heating heat supply network backwater, the condensed water discharged from the first condensed water pipeline 307 of the first steam-water heat exchanger 11 and the second condensed water pipeline 306 of the second steam-water heat exchanger 14 flows into the heat supply condensed water pump 15, the heat supply condensed water pump 15 can be used for conveying the condensed water, the condensed water discharged from the first steam-water heat exchanger 11 and the second steam-water heat exchanger 14 can be conveyed to the condensed water treatment device 16, the condensed water is treated by the condensed water treatment device 16 and then conveyed to the steam generator 1, so that the steam generator 1 can recycle the condensed water, and the water utilization rate is improved.
Optionally, the condensed water treatment device 16 comprises a condenser 5, a condensed water pump 6, a low-pressure heater 7, a deaerator 8, a water feed pump 9 and a high-pressure heater 10; a first inlet of the deaerator 8 is connected with an outlet of the heat supply condensate pump 15 and a first outlet of the low-pressure heater 7, a second inlet is connected with a second steam outlet of the high-pressure cylinder 2, a third inlet is connected with a second outlet of the low-pressure heater 7, and an outlet is connected with an inlet of the water feeding pump 9; the outlet of the feed water pump 9 is connected with the first inlet of the high-pressure heater 10; a second inlet of the high-pressure heater 10 is connected with a third steam outlet of the high-pressure cylinder 2, a first outlet is connected with an inlet of the steam generator 1, and a second outlet is connected with a fourth inlet of the deaerator 8; a first steam outlet of the low-pressure cylinder 3 is connected with a first inlet of a low-pressure heater 7, and a second steam outlet is connected with an inlet of a condenser 5; the outlet of the condenser 5 is connected with the inlet of the condensate pump 6, and the touch control of the condensate pump 6 is connected with the second inlet of the low-pressure heater 7.
Wherein, the condensed water that heat supply condensate pump 15 discharged first vapour heat exchanger 11 and second vapour heat exchanger 14 is carried to oxygen-eliminating device 8, oxygen and other gaseous in the condensed water are detached to oxygen-eliminating device 8, and oxygen-eliminating device 8 itself is a hybrid heater again simultaneously, has played the effect of heating the condensed water, improving the condensed water temperature, can improve the temperature of condensed water. The steam discharged from the second steam outlet of the high pressure cylinder 2 is transmitted to the deaerator 8, and the steam discharged from the third steam outlet of the high pressure cylinder 2 is transmitted to the high pressure heater 10. Low-pressure heater 7 is transmitted to 3 first steam outlet exhaustd steam of low pressure jar, 3 second steam outlet exhaustd steam of low pressure jar passes through condenser 5 condensate water, condensate water among condenser 5 flows into condensate pump 6, condensate water among condenser 5 is carried through condensate pump 6, condensate water after low-pressure heater 7 will heat transmits to oxygen-eliminating device 8, the condensate water that has the uniform temperature in with the 8 water storage tanks of oxygen-eliminating device is carried for high pressure heater 10 for feed pump 9, transmit to steam generator 1 after high pressure heater 10 heats, realize the reuse of condensate water in the system, improve the water utilization ratio.
Optionally, the steam exhaust pipe 204 of the steam heater 12 is connected with the heat supply network water heating steam pipeline 305; or the steam exhaust pipe 204 of the steam heater 12 is connected with the deaerator 8, and the steam exhausted by the steam heater 12 is used for heating the condensed water entering the deaerator 8.
The steam discharged from the steam discharge pipe 204 of the steam heater 12 may be used to heat the heat supply network water to heat the heat supply network backwater in the steam pipeline 305, or used to heat the condensed water entering the deaerator 8, so as to realize the cyclic utilization of the steam and improve the utilization rate of the steam.
Fig. 2 is a schematic structural diagram of another nuclear energy heating and steam supplying coupling system provided by the embodiment of the present invention, referring to fig. 2, optionally, a water inlet of the first steam-water heat exchanger 11 is connected to an outlet of the condensate pump 6; the water outlet of the first steam-water heat exchanger 11 is connected with the inlet of the low-pressure heater 7, or the water outlet of the first steam-water heat exchanger 11 is connected with the fifth inlet of the deaerator 8.
Wherein, when non-heating season, can make the condensate water among the condensate pump 6 transmit to first vapor heat exchanger 11, use condensate water among the condensate pump 6 to cool down the medium temperature saturated steam among the first vapor heat exchanger 11, guarantee the quality and the superheat degree of outer steam that supplies to first vapor heat exchanger 11 carries out the condensate water that produces among the cooling process of cooling down with medium temperature saturated steam and transmits to low pressure heater 7 or directly introduce into deaerator 8, realize recycling of condensate water.
Referring to fig. 1, optionally, the steam inlet of the first steam-water heat exchanger 11 is connected with the second intermediate-temperature steam extraction pipeline 301 through an intermediate-temperature industrial saturated steam pipeline 302; a first regulating valve V1 is arranged on the high-temperature steam extraction pipeline 102, a second regulating valve V2 is arranged on the first medium-temperature steam extraction pipeline 202, a third regulating valve V3 is arranged on the medium-temperature industrial saturated steam pipeline 302, a fourth regulating valve V4 is arranged on the heat supply network water heating steam pipeline 305, a fifth regulating valve V5 is arranged on the first steam-water heat exchanger water inlet pipe 502, and a sixth regulating valve V6 is arranged on the heat supply network water return main pipe 501; the system also includes a controller for adjusting the opening of each of the regulating valves.
The regulating valves V1-V6 are all electric regulating valves, and the steam quantity entering the heating steam main pipe 203 can be regulated by controlling the opening degree of a first regulating valve V1 arranged on the high-temperature steam extraction pipeline 102 and the opening degree of a second regulating valve V2 arranged on the first medium-temperature steam extraction pipeline 202 through a controller; the controller controls the opening degree of a third regulating valve V3 arranged on the medium-temperature industrial saturated steam pipeline 302, so that the steam quantity entering the first steam-water heat exchanger 11 can be regulated; the opening degree of a fourth adjusting valve V4 arranged on the heat supply network water heating steam pipeline 305 is controlled by the controller, so that the amount of steam entering the second steam-water heat exchanger 14 can be adjusted; the controller controls the opening degree of a fifth regulating valve V5 arranged on the first steam-water heat exchanger water inlet pipe 502 and the opening degree of a sixth regulating valve V6 arranged on the heat supply network water return main pipe 501, so that the water inflow entering the first steam-water heat exchanger 11 can be regulated, and the temperature reduction amplitude and effect of the intermediate-temperature saturated steam introduced by the intermediate-temperature industrial saturated steam pipeline 302 are further regulated.
Optionally, the intermediate-temperature industrial saturated steam pipeline 302 is provided with a first pressure sensor and a first temperature sensor; a second pressure sensor and a second temperature sensor are arranged on the low-temperature industrial saturated steam pipeline 303; a third pressure sensor, a third temperature sensor and a first flow sensor are arranged on the external supply superheated steam pipeline 304; the controller is also used for adjusting the opening degree of at least one of the first regulating valve, the second regulating valve, the third regulating valve and the fifth regulating valve according to the detection values of the first pressure sensor, the first temperature sensor, the second pressure sensor, the second temperature sensor, the third pressure sensor, the third temperature sensor and the first flow sensor.
A fourth pressure sensor, a fourth temperature sensor and a second flow sensor are arranged on the heat supply network water supply main pipe 504; a fifth pressure sensor, a fifth temperature sensor and a third flow sensor are arranged on the heat supply network backwater main pipe 501; the controller is also used for adjusting the opening degree of at least one of the fourth regulating valve and the sixth regulating valve according to the detection values of the fourth pressure sensor, the fourth temperature sensor, the second flow sensor, the fifth pressure sensor, the fifth temperature sensor and the third flow sensor.
The steam inlet pipeline of the first steam-water heat exchanger 11 is provided with a first pressure sensor and a first temperature sensor, the steam outlet pipeline is provided with a second pressure sensor and a second temperature sensor, the steam inlet pipeline of the steam heater 12 is the steam outlet pipeline of the first steam-water heat exchanger 11, the steam outlet pipeline of the steam heater 12 is provided with a third pressure sensor, a third temperature sensor and a first flow sensor, and the controller can control and adjust the opening degree of at least one of the first regulating valve, the second regulating valve, the third regulating valve and the fifth regulating valve by receiving detection values transmitted by the sensors, so that the control of the air supply flow, the steam supply pressure and the steam supply temperature is realized, the working state of the system can be detected, and the operation safety of the system is ensured.
A fourth pressure sensor, a fourth temperature sensor and a second flow sensor are arranged on a water outlet pipeline of the second steam-water heat exchanger 14, a fifth pressure sensor, a fifth temperature sensor and a third flow sensor are arranged on a water inlet pipeline, and the controller can control and adjust the opening degree of at least one of a fourth adjusting valve and a sixth adjusting valve by receiving detection values transmitted by the sensors, so that the control of the heat supply amount is realized, the working state of the system can be detected, and the safety in operation of the system is ensured.
The controller can adjust the fourth adjusting valve V4 according to the sum of the heat absorption quantity Q1 of the heat supply network water in the first steam-water heat exchanger 11 and the heat absorption quantity Q2 of the heat supply network water in the second steam-water heat exchanger 14 and the heat demand Q0 of the user, so that the heat supply network water supply can meet the heat demand of the user. The controller can also obtain the total amount of external heat supply through the temperature and flow measured by a fourth temperature sensor and a second flow sensor arranged on the water outlet pipeline of the second steam-water heat exchanger 14 and the temperature and flow measured by a fifth temperature sensor and a third flow sensor arranged on the heat supply network return water main pipe 501, and the total amount of external heat supply is larger than the heat demand of the user by controlling the opening degree of a fourth regulating valve V4.
Illustratively, if Q1+ Q2 > Q0, it indicates that the external heat supply is greater than the user demand, the fourth regulating valve V4 may be turned down by the controller, so that the flow of the medium-temperature saturated steam entering the second steam-water heat exchanger 14 to heat the heat supply network water is reduced, and when the sum of Q1 and Q2 reaches the Q0 value, the controller controls to keep the opening of the fourth regulating valve V4 unchanged, thereby realizing the balanced and stable operation of the external heat supply system.
If Q1+ Q2 is less than Q0, which indicates that the external heat supply amount is less than the user demand amount, the fourth regulating valve V4 can be adjusted to be larger through the controller, so that the flow of the medium-temperature saturated steam entering the second steam-water heat exchanger 14 to heat the heat supply network water is increased, and when the sum of Q1 and Q2 reaches the Q0 value, the opening degree of the fourth regulating valve V4 is kept unchanged through the controller control, so that the balanced and stable operation of an external heat supply system is realized.
The control level of external steam supply and heat supply can be improved by setting necessary temperature, pressure and flow rate points. And the opening degree of each corresponding electric control valve is controlled in real time, so that the flow and the temperature of the externally supplied steam and the superheat degree of the externally supplied steam can be accurately controlled, and the heat supply and steam supply effects are guaranteed.
Optionally, the controller is further configured to adjust an opening of at least one of the first regulating valve V1 and the fifth regulating valve V5 based on the user-side steam temperature measurement, the user-side hot temperature target value, and the user-side steam pressure.
A first pressure sensor and a first temperature sensor are arranged on the medium-temperature industrial saturated steam pipeline 302 at the inlet of the first steam-water heat exchanger 11, and the measured values of the first pressure sensor and the first temperature sensor are respectively marked as P1 and T1; a second pressure sensor and a second temperature sensor are arranged on the low-temperature industrial saturated steam pipeline 303 at the inlet of the steam heater 12, and the measured values of the second pressure sensor and the second temperature sensor are respectively marked as P2 and T2; a third pressure sensor and a third temperature sensor are arranged on the superheated steam supply pipeline 304 outside the outlet of the steam heater 12, and the measured values of the third pressure sensor and the third temperature sensor are respectively marked as P3 and T3; pressure and temperature measuring points are arranged on the steam pipeline on the No. 1 user side, and the measured values are respectively marked as P user 1 and T user 1. (if there are a plurality of industrial steam users, can install pressure, temperature measurement station and serial number in proper order at user side respectively, the utility model discloses use No. 1 user as the example to explain).
S1: according to the steam pressure Puser 1 at the number 1 user side, the corresponding saturated steam temperature T0 under the pressure can be obtained through a saturated steam parameter table;
s2: if T0 is less than Tuser 1, the steam at the user side is still in an overheated state, and the measured value Tuser 1 of the steam temperature at the user side is ensured to be not less than the target of the heat consumption temperature Ttarget required by the user. When Tuser 1 is less than the Ttarget, the controller can control the first regulating valve V1 to be properly regulated to increase the steam inlet flow and the steam inlet temperature of the high-temperature steam of the steam heater 12 and increase the steam outlet temperature of the steam heater until Tuser 1 reaches the Ttarget temperature;
s3: if T0 is larger than or equal to Tuser 1, indicating that steam at the user side is in a saturated state, firstly, controlling and adjusting the opening of a first adjusting valve V1 through a controller to ensure that the Tuser 1 is larger than or equal to Ttarget temperature; when T user 1 is greater than or equal to T target temperature, T0 is greater than T user 1, no further adjustment is needed;
s4: tuser 1 is more than or equal to Ttarget temperature, and when T0 is more than or equal to Tuser 1, the situation is divided into two modes:
in the safe mode, the steam in the pipeline along the external steam supply pipeline is always kept in an overheated state, so that the loss of condensed water and potential safety hazards of the pipeline along the way are reduced to the maximum extent. Since Tuser 1 is greater than or equal to Ttarget temperature, the heating steam moisture content should be preferentially reduced under the condition. The fifth regulating valve V5 is controlled to be enlarged through the controller, so that the amount of cooling water flowing into the first steam-water heat exchanger 11 is increased, the medium-temperature saturated steam entering the first steam-water heat exchanger 11 is reduced to a lower saturation temperature, meanwhile, the first regulating valve V1 is enlarged, the steam inlet flow and the steam inlet temperature of the high-temperature steam of the steam heater 12 are improved, and T user 1 is kept to be not lower than T target temperature, wherein in the engineering, for a long-distance steam conveying pipeline, the pressure drop and the temperature drop can be obtained according to the calculation of a specific formula aiming at a specific pipeline, and the temperature drop value of the economical steam pipeline per kilometer can be determined. Assuming that the economic value of the temperature drop of the external steam supply pipeline along the way is delta T, which is calculated according to a related formula and determined by an engineering empirical value, when the value (T3-T user 1) reaches the delta T value, the opening degrees of the first regulating valve V1 and the fifth regulating valve V5 are kept unchanged, so that the safe and stable operation of the external steam supply system is realized.
In the economy mode, if the temperature T3-Tuser 1 of the medium-temperature superheated steam at the outlet of the steam heater 12 is more than delta T, the heat dissipation loss of the on-way steam can be reduced by reducing the moisture content of the heating steam. The fifth regulating valve V5 is enlarged through the controller, so that the amount of cooling water flowing into the first steam-water heat exchanger 11 is increased, the medium-temperature saturated steam entering the first steam-water heat exchanger 11 is reduced to a lower saturation temperature, meanwhile, the first regulating valve V1 is enlarged, the steam inlet flow and the steam inlet temperature of the high-temperature steam of the steam heater are improved, the T user 1 is kept to be not lower than the T target temperature, and when the (T3-T user 1) reaches a delta T value, the opening degrees of the first regulating valve V1 and the fifth regulating valve V5 are kept unchanged, so that the safe and stable operation of an external steam supply system is realized.
Optionally, radiation monitoring instruments are arranged on the external supply superheated steam pipeline 304, the heat supply network return water main pipe 501 and the heat supply network water supply main pipe 504; a first shut-off valve V7 is arranged on the heat supply network water return main pipe 501, and a second shut-off valve V8 is arranged on the heat supply network water supply main pipe 504; the radiation monitoring instrument is used for monitoring the radiation dose level of the medium in the pipe in real time; the controller is used for closing the third adjusting valve V3 when the radiation dose level of the external supply superheated steam pipeline 304 is larger than a preset value, closing the first shut-off valve V7 when the radiation dose level of the heat supply network water return main pipe 501 is larger than the preset value, and closing the second shut-off valve V8 when the radiation dose level of the heat supply network water supply main pipe 504 is larger than the preset value.
When the radiation dosage level of the medium in the pipe monitored by the radiation monitoring instrument in real time received by the controller is greater than the preset value, the first shut-off valve V7, the second shut-off valve V8 and the third regulating valve V3 can be controlled to be closed, so that the diffusion of radioactive pollution is avoided, and the safety of external steam supply and heat supply is further improved.
Optionally, a heat supply network backwater treatment device is arranged on the water inlet side of the heat supply network circulating pump 13, and the heat supply network backwater treatment device is used for performing decontamination, filtration, purification and deoxidization treatment on the heat supply network backwater; a constant-pressure water supplementing device is arranged on the heat supply network water return main pipe 501; the first steam-water heat exchanger 11, the steam heater 12 and the second steam-water heat exchanger 14 are in the structural form of shell-and-tube type, plate type, spiral plate type, tube type or heat pipe type.
Before entering the heat supply network circulating pump 13, the heat supply network backwater needs to be subjected to decontamination, filtration, purification and deoxidization through process equipment, so that the safety of the heat supply network backwater is ensured. By arranging the constant-pressure water replenishing device on the heat supply network water return pipe 501, the pressure stability of the heat supply network water pipeline system can be maintained.
The embodiment of the utility model provides a through all setting up multistage heat exchanger in heating heat supply return circuit and external confession industrial steam return circuit, the middle temperature saturated steam of original direct external confession is through condensation dehumidification earlier then intensification, has improved the superheat degree of external industry confession vapour greatly to can increase the transport distance of external confession industrial steam by a wide margin, and reduce the condensate loss of industrial steam in transportation process. The heat recovered in the process of condensing the medium-temperature saturated steam is used for heating the return water of the heat supply network, and energy loss is not caused. Through the regulating valves and the temperature, pressure and flow measuring points arranged on the pipelines, in the operation process, the controller controls the opening degree of each corresponding electric regulating valve in real time according to related pressure and temperature signals monitored in real time and according to the change process of the pressure and the temperature, so that the accurate control of the flow and the temperature of external steam supply and heat supply and the superheat degree of the external steam supply are realized, and the heat supply and steam supply effects are guaranteed.
It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present invention may be executed in parallel, may be executed sequentially, or may be executed in different orders, as long as the desired result of the technical solution of the present invention can be achieved, and the present invention is not limited thereto.
The above detailed description does not limit the scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A nuclear power heating and steam supply coupling system, comprising:
the system comprises a steam generator, a high-pressure cylinder, a low-pressure cylinder, a first steam-water heat exchanger, a steam heater, a heat supply network circulating pump and a second steam-water heat exchanger;
a steam outlet of the steam generator is connected with a steam inlet of the high-pressure cylinder through a main steam pipe, and a first steam outlet of the high-pressure cylinder is connected with a steam inlet of the low-pressure cylinder through a high-pressure cylinder steam communicating pipe and a low-pressure cylinder steam communicating pipe;
the steam inlet of the first steam-water heat exchanger is connected with a second intermediate-temperature steam extraction pipeline, the second intermediate-temperature steam extraction pipeline is connected with the high-low pressure cylinder steam communicating pipe, and the steam outlet of the first steam-water heat exchanger is connected with the steam inlet of the steam heater through a low-temperature industrial saturated steam pipeline; the water inlet of the first steam-water heat exchanger is connected with a heat supply network backwater main pipe through a first steam-water heat exchanger water inlet pipe, the heat supply network backwater main pipe is connected with the heat supply network circulating pump, and the heat supply network circulating pump is used for introducing heat supply network backwater into the heat supply network backwater main pipe; the water outlet of the first steam-water heat exchanger is connected with a heat supply network backwater main pipe through a water outlet pipe of the first steam-water heat exchanger;
a heating steam main pipe of the steam heater is respectively connected with a high-temperature steam extraction pipeline and a first medium-temperature steam extraction pipeline, wherein the first medium-temperature steam extraction pipeline is connected with a high-low pressure cylinder steam communicating pipe, and the high-temperature steam extraction pipeline is connected with the main steam pipe; the steam supply port of the steam heater is connected with an external superheated steam supply pipeline;
the water inlet of the second steam-water heat exchanger is connected with a heat supply network water return main pipe, the steam inlet of the second steam-water heat exchanger is connected with a second medium-temperature steam extraction pipeline through a heat supply network water heating steam pipeline, and the water outlet of the second steam-water heat exchanger is connected with a heat supply network water supply main pipe;
the first steam-water heat exchanger is used for cooling the medium-temperature saturated steam introduced from the second medium-temperature steam extraction pipeline through the heat supply network backwater introduced from the heat supply network backwater main pipe, converting the medium-temperature saturated steam into low-temperature saturated steam, and inputting the low-temperature saturated steam into the steam heater through the low-temperature industrial saturated steam pipeline;
the steam heater is used for heating the low-temperature saturated steam through the high-temperature saturated steam, converting the low-temperature saturated steam into superheated steam, and supplying the superheated steam to a steam user through an external superheated steam supply pipeline; the high-temperature saturated steam used for heating the low-temperature saturated steam in the steam heater is formed by mixing high-temperature high-pressure saturated steam led from a high-temperature steam extraction pipeline and medium-temperature medium-pressure saturated steam led from a high-low pressure cylinder steam communicating pipe;
the second steam-water heat exchanger is used for receiving the heated return water of the heat supply network in the first steam-water heat exchanger, heating the return water of the heat supply network through medium-temperature saturated steam introduced by a steam pipeline heated by the water of the heat supply network, and leading the heated water of the heat supply network to a heat supply user through a water supply main pipe of the heat supply network.
2. The system of claim 1, further comprising:
a condensed water treatment device and a heat supply condensed water pump;
a first condensed water pipeline of the first steam-water heat exchanger and a second condensed water pipeline of the second steam-water heat exchanger are both connected with an inlet of a heat supply condensed water pump, and an outlet of the heat supply condensed water pump is connected with an inlet of a condensed water treatment device;
the heat supply condensate pump is used for pumping condensate water discharged by the first steam-water heat exchanger and the second steam-water heat exchanger into a condensate water treatment device;
the outlet of the condensed water treatment device is connected with the inlet of the steam generator, and the condensed water treatment device is used for deoxidizing and heating the condensed water and then introducing the deoxidized condensed water into the steam generator.
3. The system of claim 2, wherein:
the condensed water treatment device comprises a condenser, a condensed water pump, a low-pressure heater, a deaerator, a water feed pump and a high-pressure heater;
a first inlet of the deaerator is connected with an outlet of the heat supply condensed water pump and a first outlet of the low-pressure heater, a second inlet of the deaerator is connected with a second steam outlet of the high-pressure cylinder, a third inlet of the deaerator is connected with a second outlet of the low-pressure heater, and an outlet of the deaerator is connected with an inlet of the water feed pump;
the outlet of the feed water pump is connected with the first inlet of the high-pressure heater;
a second inlet of the high-pressure heater is connected with a third steam outlet of the high-pressure cylinder, a first outlet of the high-pressure heater is connected with an inlet of the steam generator, and a second outlet of the high-pressure heater is connected with a fourth inlet of the deaerator;
a first steam outlet of the low-pressure cylinder is connected with a first inlet of the low-pressure heater, and a second steam outlet is connected with an inlet of the condenser;
the outlet of the condenser is connected with the inlet of the condensate pump, and the touch of the condensate pump is connected with the second inlet of the low-pressure heater.
4. The system of claim 3, wherein:
the steam exhaust pipe of the steam heater is connected with a heat supply network water heating steam pipeline;
or a steam exhaust pipe of the steam heater is connected with the deaerator, and the steam exhausted by the steam heater is used for heating the condensed water entering the deaerator.
5. The system of claim 3, wherein:
a water inlet of the first steam-water heat exchanger is connected with an outlet of the condensed water pump;
the water outlet of the first steam-water heat exchanger is connected with the inlet of the low-pressure heater, or the water outlet of the first steam-water heat exchanger is connected with the fifth inlet of the deaerator.
6. The system of claim 2, wherein:
the steam inlet of the first steam-water heat exchanger is connected with a second medium-temperature steam extraction pipeline through a medium-temperature industrial saturated steam pipeline;
a first regulating valve V is arranged on the high-temperature steam extraction pipeline, a second regulating valve is arranged on the first medium-temperature steam extraction pipeline, a third regulating valve is arranged on the medium-temperature industrial saturated steam pipeline, a fourth regulating valve is arranged on the heat supply network water heating steam pipeline, a fifth regulating valve is arranged on the water inlet pipe of the first steam-water heat exchanger, and a sixth regulating valve is arranged on the heat supply network water return main pipe;
the system also comprises a controller, wherein the controller is used for adjusting the opening degree of each adjusting valve.
7. The system of claim 6, wherein:
a first pressure sensor and a first temperature sensor are arranged on the medium-temperature industrial saturated steam pipeline;
a second pressure sensor and a second temperature sensor are arranged on the low-temperature industrial saturated steam pipeline;
a third pressure sensor, a third temperature sensor and a first flow sensor are arranged on the external supply hot steam pipeline;
the controller is further used for adjusting the opening degree of at least one of the first regulating valve, the second regulating valve, the third regulating valve and the fifth regulating valve according to the detection values of the first pressure sensor, the first temperature sensor, the second pressure sensor, the second temperature sensor, the third pressure sensor, the third temperature sensor and the first flow sensor;
a fourth pressure sensor, a fourth temperature sensor and a second flow sensor are arranged on the heat supply network water supply main pipe;
a fifth pressure sensor, a fifth temperature sensor and a third flow sensor are arranged on the heat supply network backwater main pipe;
the controller is also used for adjusting the opening degree of at least one of the fourth adjusting valve and the sixth adjusting valve according to the detection values of the fourth pressure sensor, the fourth temperature sensor, the second flow sensor, the fifth pressure sensor, the fifth temperature sensor and the third flow sensor.
8. The system of claim 7, wherein:
the controller is also used for adjusting the opening of at least one of the first adjusting valve and the fifth adjusting valve according to the user side steam temperature measured value, the user side heat temperature target value and the user side steam pressure.
9. The system of claim 6, wherein:
radiation monitoring instruments are arranged on the external superheated steam supply pipeline, the heat supply network backwater main pipe and the heat supply network water supply main pipe;
a first shutoff valve is arranged on the heat supply network water return main pipe, and a second shutoff valve is arranged on the heat supply network water supply main pipe;
the radiation monitoring instrument is used for monitoring the radiation dose level of the medium in the pipe in real time;
the controller is used for closing the third regulating valve when the radiation dose level of the external supply superheated steam pipeline is larger than a preset value, closing the first shut-off valve when the radiation dose level of the heat supply network water return main pipe is larger than the preset value, and closing the second shut-off valve when the radiation dose level of the heat supply network water supply main pipe is larger than the preset value.
10. The system of claim 1, wherein:
a heat supply network backwater treatment device is arranged on the water inlet side of the heat supply network circulating pump and is used for performing decontamination, filtration, purification and deoxidization treatment on the heat supply network backwater;
a constant-pressure water replenishing device is arranged on the heat supply network backwater main pipe;
the first steam-water heat exchanger, the steam heater and the second steam-water heat exchanger are in the structural types of shell-and-tube type, plate type, spiral plate type, tube type or heat pipe type.
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| CN202221965067.5U CN217844064U (en) | 2022-07-28 | 2022-07-28 | Nuclear energy heat supply and steam supply coupling system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117419324A (en) * | 2023-10-13 | 2024-01-19 | 辽河石油勘探局有限公司 | Molten salt heating wet saturated steam generation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117419324A (en) * | 2023-10-13 | 2024-01-19 | 辽河石油勘探局有限公司 | Molten salt heating wet saturated steam generation system |
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