CN209944297U - Thermodynamic system of power plant - Google Patents
Thermodynamic system of power plant Download PDFInfo
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- CN209944297U CN209944297U CN201920475758.9U CN201920475758U CN209944297U CN 209944297 U CN209944297 U CN 209944297U CN 201920475758 U CN201920475758 U CN 201920475758U CN 209944297 U CN209944297 U CN 209944297U
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Abstract
The utility model relates to the field of thermal power generation, and discloses a thermal system of a power plant, which comprises a deaerator, a low-pressure heating device and a condenser; the deaerator, the low-pressure heating device and the condenser are communicated in sequence; further comprising: a condensed water tank; a high-temperature drainage pipeline and a high-temperature water inlet pipeline are arranged at the hot water end of the condensed water tank, and a low-temperature drainage pipeline and a low-temperature water inlet pipeline are arranged at the cold water end of the condensed water tank; the high-temperature water drainage pipeline is communicated with a water inlet of the deaerator, the high-temperature water inlet pipeline is communicated with a water outlet of the deaerator, the low-temperature water drainage pipeline is communicated with a water inlet of the condenser, and the low-temperature water inlet pipeline is communicated with a water outlet of the low-pressure heating device. The utility model discloses an add the condensate water tank, set up corresponding high temperature drain line, high temperature water intake pipe, low temperature drain line and low temperature water intake pipe in the condensate water tank to the state regulation through each pipeline of control maintains that the electric wire netting is stable, reinforcing power plant thermodynamic system's peak regulation ability and load response's speed.
Description
Technical Field
The utility model relates to a thermal power field, in particular to thermodynamic system of power plant.
Background
The power load of the power users changes along with the change of time, and meanwhile, the electric energy cannot be stored, so that the difficulty is increased for the peak shaving operation of the power plant. This requires the power plant to make how much electricity the user needs and how much electricity the power plant should generate. In order to ensure that the grid power supply is stable, the power plant typically synchronously sends out a matched amount of power according to the change of the load of the grid, which is called power peak shaving.
At present, the domestic peak regulation function is mainly completed by a thermal power plant, but the peak regulation capacity of the existing thermal power unit is limited, and in order to maintain the stability of a power grid, the thermal power unit is converting to an electric power regulation type power supply, and under the background, the thermal power unit has two requirements: on one hand, the peak regulation capacity of the existing thermal power generating unit needs to be enhanced; on the other hand, the thermal power generating unit is required to have the capability of quick load response.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
In view of the technical defects and the application requirements, the application provides a thermal system of a power plant to solve the problem that the peak regulation and load corresponding capacity of the existing thermal power generating unit are poor.
(II) technical scheme
In order to solve the above problem, the utility model provides a thermodynamic system of power plant, include: oxygen-eliminating device, low pressure heating device and condenser, the oxygen-eliminating device the low pressure heating device with the condenser communicates in proper order, still includes: a condensed water tank; a high-temperature drainage pipeline and a high-temperature water inlet pipeline are arranged at the hot water end of the condensed water tank, and a low-temperature drainage pipeline and a low-temperature water inlet pipeline are arranged at the cold water end of the condensed water tank; the high-temperature water discharge pipeline is communicated with a water inlet of the deaerator, the high-temperature water inlet pipeline is communicated with a water outlet of the deaerator, the low-temperature water discharge pipeline is communicated with a water inlet of the condenser, and the low-temperature water inlet pipeline is communicated with a water outlet of the low-pressure heating device.
Further, be equipped with first valve and first water pump in the high temperature water drainage pipeline, be equipped with second valve and second water pump in the high temperature water intake pipe, be equipped with third valve and third water pump in the low temperature water drainage pipeline, be equipped with the fourth valve in the low temperature water intake pipe.
Further, the condensed water tank includes: a cold water tank and a hot water tank; the hot water tank is connected with the high-temperature drainage pipeline and the high-temperature water inlet pipeline, and the cold water tank is connected with the low-temperature drainage pipeline and the low-temperature water inlet pipeline; the water outlet of the hot water tank is communicated with the water inlet of the deaerator through the high-temperature water drainage pipeline, and the water inlet of the hot water tank is communicated with the water outlet of the deaerator through the high-temperature water inlet pipeline; the water outlet of the cold water tank is communicated with the water inlet of the condenser through the low-temperature water drainage pipeline, and the water inlet of the cold water tank is communicated with the water outlet of the low-pressure heating device through the low-temperature water inlet pipeline.
Further, still include: the system comprises a boiler, a high-pressure cylinder, a medium-pressure cylinder, a low-pressure cylinder and a generator; the high pressure jar, the intermediate pressure jar, the low pressure jar with the generator concatenates in proper order, the boiler through first main steam pipeline with the high pressure jar intercommunication, the boiler through second main steam pipeline with the intermediate pressure jar intercommunication, the intermediate pressure jar through third main steam pipeline with the low pressure jar intercommunication.
Further, still include: a high-pressure heating device; the high-pressure heating apparatus includes: a first high pressure heater, a second high pressure heater and a third high pressure heater; the first high-pressure heater, the second high-pressure heater and the third high-pressure heater are connected in series step by step, the drainage section of the third high-pressure heater is communicated with the high drainage opening of the deaerator, and the water feeding section of the third high-pressure heater is communicated with the water outlet of the deaerator.
Further, the first high-pressure heater and the second high-temperature heater are both communicated with the air pumping port of the high-pressure cylinder, and the third high-pressure heater is communicated with the air pumping port of the intermediate-pressure cylinder.
Further, the low-pressure heating apparatus includes: the first low-pressure heater, the second low-pressure heater, the third low-pressure heater, the fourth low-pressure heater and the shaft seal heater; the first low-pressure heater, the second low-pressure heater, the third low-pressure heater, the fourth low-pressure heater and the shaft seal heater are connected in series step by step, the shaft seal heater is communicated with a low water feeding return port of the condenser, and a water draining section of the first low-pressure heater is communicated with a low water feeding drain port of the deaerator.
Further, the second low-pressure heater, the third low-pressure heater and the fourth low-pressure heater are all communicated with the air pumping port of the low-pressure cylinder, and the first low-pressure heater is communicated with the air pumping port of the intermediate-pressure cylinder.
Further, the rotor in the high-pressure cylinder is connected with the rotor in the intermediate-pressure cylinder through a first coupling; the rotor in the middle pressure cylinder is connected with the rotor in the low pressure cylinder through a second coupling; and the rotor in the low-pressure cylinder is connected with the rotor of the generator through a third coupler.
Furthermore, an upper water distributor and a lower water distributor are arranged in the condensed water tank, the high-temperature drainage pipeline and the high-temperature water inlet pipeline are both communicated with the upper water distributor, and the low-temperature drainage pipeline and the low-temperature water inlet pipeline are both communicated with the lower water distributor.
(III) advantageous effects
The utility model provides a thermodynamic system of power plant through addding the condensate water tank, sets up corresponding high temperature drain line, high temperature water intake pipe, low temperature drain line and low temperature water intake pipe in the condensate water tank in the cooperation, and when the power consumption load descends, through opening low temperature drain line and high temperature water intake pipe, closes low temperature water intake pipe and high temperature drain line, reduces thermodynamic system's of power plant generated energy. When the electric load rises, the low-temperature water inlet pipeline and the high-temperature water outlet pipeline are opened, and the low-temperature water outlet pipeline and the high-temperature water inlet pipeline are closed, so that the generated energy of the thermal system of the power plant is increased, the stability of a power grid is maintained, and the peak regulation capacity and the load response rate of the thermal system of the power plant are enhanced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a thermal system of a power plant provided by a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a thermodynamic system of a power plant provided by a second embodiment of the present invention;
wherein, 1: a condensed water tank; 2: a condenser; 3: a deaerator; 4: a boiler; 5: a high pressure cylinder; 6: an intermediate pressure cylinder; 7: a low pressure cylinder; 8: a generator; 11: a high temperature drain line; 12: a high temperature water inlet pipeline; 13: a low temperature drain line; 14: a low temperature water inlet pipeline; 15: a hot water tank; 16: a cold water tank; 21: a first high pressure heater; 22: a second high pressure heater; 23: a third high pressure heater; 24: a first low pressure heater; 25: a second low pressure heater; 26: a third low pressure heater; 27: a fourth low pressure heater; 28: a shaft seal heater.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
An embodiment of the utility model provides a thermodynamic system of power plant, as shown in fig. 1, this thermodynamic system of power plant includes: a deaerator 3, a low-pressure heating device, a condenser 2 and a condensed water tank 1. The deaerator 3, the low-pressure heating device and the condenser 2 are communicated in sequence. The low pressure heating device is used for raising the temperature of the feed water, and the deaerator 3 is used for removing oxygen and other gases in the feed water of the boiler. The hot water end of the condensed water tank 1 is provided with a high-temperature drainage pipeline 11 and a high-temperature water inlet pipeline 12, and the cold water end of the condensed water tank 1 is provided with a low-temperature drainage pipeline 13 and a low-temperature water inlet pipeline 14. Wherein, the high temperature water drainage pipeline 11 is communicated with the water inlet of the deaerator 3, the high temperature water inlet pipeline 12 is communicated with the water outlet of the deaerator 3, the low temperature water drainage pipeline 13 is communicated with the water inlet of the condenser 2, and the low temperature water inlet pipeline 14 is communicated with the water outlet of the low pressure heating device.
This thermodynamic system of power plant is in the course of the work, when the power consumption load descends, can open low temperature water drainage pipeline 13 and high temperature water inlet pipeline 12, the water yield through condenser 2 increases, under the condition of guaranteeing that the heating condensate water of each grade heaies up and keeps unchangeable basically, the steam extraction volume increases, this part condensate water of increase gets into behind the oxygen-eliminating device 3, close low temperature water inlet pipeline 14 and high temperature water drainage pipeline 11, the condensate water that will be heated with this part is sent into and is stored in condensate water tank 1, thereby reduce thermodynamic system's of power plant generated energy, make this thermodynamic system of power plant accomplish with the power consumption and match.
Similarly, when the power load rises, the low-temperature water inlet pipeline 14 and the high-temperature water outlet pipeline 11 can be opened, the low-temperature water outlet pipeline 13 and the high-temperature water inlet pipeline 12 are closed, the flow of condensed water entering the low-pressure heating device is reduced, steam extraction is reduced, hot water in the condensed water tank 1 is fed into the water inlet of the deaerator 3, the amount of condensed water entering the deaerator 3 is kept unchanged, the generated energy of the thermodynamic system of the power plant is increased, and the matching of the thermodynamic system of the power plant and the power consumption is completed.
In this embodiment, the condensed water tank 1 is a single-tank structure with a cold-hot inclined temperature layer, an upper water distributor and a lower water distributor are arranged in the condensed water tank 1, the high-temperature drainage pipeline 11 and the high-temperature water inlet pipeline 12 are both communicated with the upper water distributor, and the low-temperature drainage pipeline 13 and the low-temperature water inlet pipeline 14 are both communicated with the lower water distributor. When cold water and hot water are stored simultaneously in a single tank mode, a certain temperature gradient is formed in a region where the hot water and the cold water are close to each other, namely the temperature of the cold water is transited to the temperature of the hot water in a certain height range, and the temperature change region is called as an inclined temperature layer. The condensed water tank 1 realizes the function of storing cold and hot water simultaneously in one tank by using the principle that a temperature gradient layer exists between cold and hot water. When hot water enters and exits, the hot water enters and exits the hot water area uniformly through the upper water distributor. When cold water enters and exits, the cold water area is uniformly entered and exited through the lower water distributor.
Wherein, the high temperature water drainage pipeline 11, the high temperature water inlet pipeline 12, the low temperature water drainage pipeline 13 and the low temperature water inlet pipeline 14 are all provided with corresponding valves and water pumps. Specifically, a first valve and a first water pump are arranged on the high-temperature water drainage pipeline 11, a second valve and a second water pump are arranged on the high-temperature water inlet pipeline 12, a third valve and a third water pump are arranged on the low-temperature water drainage pipeline 13, and a fourth valve is arranged on the low-temperature water inlet pipeline 14.
In this embodiment, the thermal system of the power plant further includes: boiler 4, high pressure cylinder 5, intermediate pressure cylinder 6, low pressure cylinder 7 and generator 8. High pressure cylinder 5, intermediate pressure cylinder 6, low pressure cylinder 7 and generator 8 concatenate in proper order, and boiler 4 communicates with high pressure cylinder 5 through first main steam pipeline, and boiler 4 communicates with intermediate pressure cylinder 6 through second main steam pipeline, and intermediate pressure cylinder 6 communicates with low pressure cylinder 7 through third main steam pipeline. The rotor in the high-pressure cylinder 5 is connected with the rotor in the intermediate-pressure cylinder 6 through a first coupler, the rotor in the intermediate-pressure cylinder 6 is connected with the rotor in the low-pressure cylinder 7 through a second coupler, and the rotor in the low-pressure cylinder 7 is connected with the rotor of the generator 8 through a third coupler, so that high-temperature and high-pressure steam generated by the boiler 4 is matched with the generator 8 to generate electricity.
When the power load is reduced, the third water pump is started, the third valve is opened, the second valve is closed, under the condition that the temperature rise of heating condensed water at all levels is basically kept unchanged, the steam extraction quantity at all levels of the low-pressure cylinder 7 is increased, after the increased condensed water enters the deaerator 3, the second water pump is started, the second valve is opened, the first valve is closed, the first water pump is closed, the heated condensed water is sent into the hot water tank to be stored, and therefore the generated energy of the thermodynamic system of the power plant is reduced, and the thermodynamic system of the power plant is matched with the power consumption. When the electric load rises, the third water pump and the third valve are closed, the second water pump and the second valve are closed, the first water pump is started, the first valve is opened, and the fourth valve is opened. The partial condensate that gets into low system that adds gets into cold water tank at this time, has reduced the condensate flow that gets into low and adds, has reduced low pressure jar 7 steam extraction, has increased low pressure jar 7 generated energy, and in order to make the condensate flow that gets into oxygen-eliminating device 3 maintain unchangeably simultaneously, start first water pump, open first valve, send the hot water in the hot water tank into oxygen-eliminating device 3 entry.
It should be noted that, compared with the prior art, the thermal system of the power plant provided in this embodiment can achieve a rated load at which an AGC (Automatic Gain Control) load adjustment speed of the unit reaches 2.5% -3% per minute, and the peak shaving capability of the unit is increased by about 5% of the rated load.
In this embodiment, this power plant's thermodynamic system still includes high pressure heating device, and high pressure heating device is direct current step by step, includes: a first high pressure heater 21, a second high pressure heater 22 and a third high pressure heater 23. The first high-pressure heater 21, the second high-pressure heater 22 and the third high-pressure heater 23 are connected in series step by step, and the drainage section of the third high-pressure heater 23 is communicated with a high-pressure drainage opening of the deaerator 3. The water feeding section of the third high-pressure heater 23 is communicated with the water outlet of the deaerator 3, and a water feeding pump is further arranged between the water feeding section of the third high-pressure heater 23 and the water outlet of the deaerator 3 so as to facilitate the water feeding to flow into the boiler 4. The first high-pressure heater 21 and the second high-temperature heater 22 are both communicated with the air suction port of the high-pressure cylinder 5, and the third high-pressure heater 23 is communicated with the air suction port of the intermediate-pressure cylinder 6.
Similarly, in this embodiment, the low-voltage heating device also gradually flows the direct current, including: a first low pressure heater 24, a second low pressure heater 25, a third low pressure heater 26, a fourth low pressure heater 27 and a gland seal heater 28. The first low-pressure heater 24, the second low-pressure heater 25, the third low-pressure heater 26, the fourth low-pressure heater 27 and the shaft seal heater 28 are connected in series step by step, the shaft seal heater 28 is used for recovering shaft seal leakage steam and heating condensed water by using heat of the shaft seal leakage steam, the shaft seal heater 28 is communicated with a low water feeding return water port of the condenser 2, and a water draining section of the first low-pressure heater 24 is communicated with a low water feeding drain port of the deaerator 3. The second low-pressure heater 25, the third low-pressure heater 26 and the fourth low-pressure heater 27 are all communicated with the air suction port of the low-pressure cylinder 7, and the first low-pressure heater 24 is communicated with the air suction port of the intermediate pressure cylinder 6.
In addition, the low-temperature water inlet pipeline 14 is communicated with an outlet pipeline of the shaft seal heater 28, so that the amount of condensed water entering the shaft seal heater 28 is ensured not to be reduced, and the problem that steam such as shaft seal air leakage cannot be cooled due to the reduction of the cooling capacity of the shaft seal heater 28 is avoided. In addition, a low pressure water pump may be provided between the shaft seal heater 28 and the water outlet of the condenser 2 to make the condensed water in the condenser 2 flow into the low pressure heating apparatus better.
The embodiment of the utility model provides a thermodynamic system of power plant through addding the condensate water tank, sets up corresponding high temperature drain line, high temperature water intake pipe, low temperature drain line and low temperature water intake pipe in the condensate water tank in the cooperation, and when the power consumption load descends, through opening low temperature drain line and high temperature water intake pipe, closes low temperature water intake pipe and high temperature drain line, reduces thermodynamic system's of power plant generated energy. When the electric load rises, the low-temperature water inlet pipeline and the high-temperature water outlet pipeline are opened, and the low-temperature water outlet pipeline and the high-temperature water inlet pipeline are closed, so that the generated energy of the thermal system of the power plant is increased, the stability of a power grid is maintained, and the peak regulation capacity and the load response rate of the thermal system of the power plant are enhanced.
Based on the above embodiments, in a preferred embodiment, as shown in fig. 2, the power plant thermodynamic system comprises: a deaerator 3, a low-pressure heating device, a condenser 2 and a condensed water tank 1. The deaerator 3, the low-pressure heating device and the condenser 2 are communicated in sequence. The high-pressure heating device and the low-pressure heating device are used for increasing the temperature of feed water, and the deaerator 3 is used for removing oxygen and other gases in the feed water of the boiler. The hot water end of the condensed water tank 1 is provided with a high-temperature drainage pipeline 11 and a high-temperature water inlet pipeline 12, and the cold water end of the condensed water tank 1 is provided with a low-temperature drainage pipeline 13 and a low-temperature water inlet pipeline 14. Wherein, the high temperature water drainage pipeline 11 is communicated with the water inlet of the deaerator 3, the high temperature water inlet pipeline 12 is communicated with the water outlet of the deaerator 3, the low temperature water drainage pipeline 13 is communicated with the water inlet of the condenser 2, and the low temperature water inlet pipeline 14 is communicated with the water outlet of the low pressure heating device.
The condensate water tank 1 in this embodiment adopts two water tank structures of cold and hot, includes: a cold water tank 16 and a hot water tank 15. The hot water tank 15 is connected with a high-temperature drain line 11 and a high-temperature water inlet line 12, and the cold water tank 16 is connected with a low-temperature drain line 13 and a low-temperature water inlet line 14. The water outlet of the hot water tank 15 is communicated with the water inlet of the deaerator 3 through a high-temperature water drainage pipeline 11, and the water inlet of the hot water tank 15 is communicated with the water outlet of the deaerator 3 through a high-temperature water inlet pipeline 12. The water outlet of the cold water tank 16 is communicated with the water inlet of the condenser 2 through a low-temperature water discharge pipeline 13, and the water inlet of the cold water tank 16 is communicated with the water outlet of the low-pressure heating device through a low-temperature water inlet pipeline 14. The upper and lower thermal stress of a single water tank is small, and cold water and hot water are stored separately, so that the problem of reduction of the overall temperature after the cold water and the hot water are mixed is solved.
This thermodynamic system of power plant is in the course of the work, when the power consumption load descends, can open low temperature water drainage pipeline 13 and high temperature water inlet pipeline 12, the water yield through condenser 2 increases, under the condition of guaranteeing that the heating condensate water of each grade heaies up and keeps unchangeable basically, the steam extraction capacity of each grade increases, this part condensate water of increase gets into behind the oxygen-eliminating device 3, close low temperature water inlet pipeline 14 and high temperature water drainage pipeline 11, the condensate water that will be heated with this part is sent into and is stored in condensate water tank 1, thereby reduce thermodynamic system's of power plant generated energy, make this thermodynamic system of power plant accomplish with the power consumption and match.
Similarly, when the power load rises, the low-temperature water inlet pipeline 14 and the high-temperature water outlet pipeline 11 can be opened, the low-temperature water outlet pipeline 13 and the high-temperature water inlet pipeline 12 are closed, the flow of condensed water entering the low-pressure heating device is reduced, steam extraction is reduced, hot water in the condensed water tank 1 is fed into the water inlet of the deaerator 3, the amount of condensed water entering the deaerator 3 is kept unchanged, the generated energy of the thermodynamic system of the power plant is increased, and the matching of the thermodynamic system of the power plant and the power consumption is completed.
Wherein, the high temperature water drainage pipeline 11, the high temperature water inlet pipeline 12, the low temperature water drainage pipeline 13 and the low temperature water inlet pipeline 14 are all provided with corresponding valves and water pumps. Specifically, a first valve and a first water pump are arranged on the high-temperature water drainage pipeline 11, a second valve and a second water pump are arranged on the high-temperature water inlet pipeline 12, a third valve and a third water pump are arranged on the low-temperature water drainage pipeline 13, and a fourth valve is arranged on the low-temperature water inlet pipeline 14.
When the power load is reduced, the third water pump is started, the third valve is opened, the second valve is closed, under the condition that the temperature rise of heating condensed water at all levels is basically kept unchanged, the steam extraction quantity at all levels of the low-pressure cylinder 7 is increased, after the increased condensed water enters the deaerator 3, the second water pump is started, the second valve is opened, the first valve is closed, the first water pump is closed, the heated condensed water is sent into the hot water tank to be stored, and therefore the generated energy of the thermodynamic system of the power plant is reduced, and the thermodynamic system of the power plant is matched with the power consumption. When the electric load rises, the third water pump and the third valve are closed, the second water pump and the second valve are closed, the first water pump is started, the first valve is opened, and the fourth valve is opened. The partial condensate that gets into low system that adds gets into cold water tank at this time, has reduced the condensate flow that gets into low and adds, has reduced low pressure jar 7 steam extraction, has increased low pressure jar 7 generated energy, and in order to make the condensate flow that gets into oxygen-eliminating device 3 maintain unchangeably simultaneously, start first water pump, open first valve, send the hot water in the hot water tank into oxygen-eliminating device 3 entry.
For a more detailed structure, please refer to the text description related to fig. 1, which is not further described herein.
The embodiment of the utility model provides a thermodynamic system of power plant through addding the condensate water tank, sets up corresponding high temperature drain line, high temperature water intake pipe, low temperature drain line and low temperature water intake pipe in the condensate water tank in the cooperation, and when the power consumption load descends, through opening low temperature drain line and high temperature water intake pipe, closes low temperature water intake pipe and high temperature drain line, reduces thermodynamic system's of power plant generated energy. When the electric load rises, the low-temperature water inlet pipeline and the high-temperature water outlet pipeline are opened, and the low-temperature water outlet pipeline and the high-temperature water inlet pipeline are closed, so that the generated energy of the thermal system of the power plant is increased, the stability of a power grid is maintained, and the peak regulation capacity and the load response rate of the thermal system of the power plant are enhanced. In addition, different from the above embodiment, the present embodiment adopts a double-tank structure, although the equipment investment is larger than that of a single tank, the operation mode is flexible, the upper and lower thermal stress of a single water tank is small, and cold and hot water are stored separately, so that the problem of the reduction of the overall temperature after the cold and hot water are mixed is avoided.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. A power plant thermodynamic system comprising: oxygen-eliminating device, low pressure heating device and condenser, the oxygen-eliminating device the low pressure heating device with the condenser communicates its characterized in that still includes in proper order: a condensed water tank; a high-temperature drainage pipeline and a high-temperature water inlet pipeline are arranged at the hot water end of the condensed water tank, and a low-temperature drainage pipeline and a low-temperature water inlet pipeline are arranged at the cold water end of the condensed water tank; the high-temperature water discharge pipeline is communicated with a water inlet of the deaerator, the high-temperature water inlet pipeline is communicated with a water outlet of the deaerator, the low-temperature water discharge pipeline is communicated with a water inlet of the condenser, and the low-temperature water inlet pipeline is communicated with a water outlet of the low-pressure heating device.
2. A power plant thermodynamic system as claimed in claim 1, wherein the high temperature water drain line has a first valve and a first water pump disposed therein, the high temperature water inlet line has a second valve and a second water pump disposed therein, the low temperature water drain line has a third valve and a third water pump disposed therein, and the low temperature water inlet line has a fourth valve disposed therein.
3. A power plant thermodynamic system according to claim 1, wherein the condensate water tank comprises:
a cold water tank and a hot water tank; the hot water tank is connected with the high-temperature drainage pipeline and the high-temperature water inlet pipeline, and the cold water tank is connected with the low-temperature drainage pipeline and the low-temperature water inlet pipeline;
the water outlet of the hot water tank is communicated with the water inlet of the deaerator through the high-temperature water drainage pipeline, and the water inlet of the hot water tank is communicated with the water outlet of the deaerator through the high-temperature water inlet pipeline; the water outlet of the cold water tank is communicated with the water inlet of the condenser through the low-temperature water drainage pipeline, and the water inlet of the cold water tank is communicated with the water outlet of the low-pressure heating device through the low-temperature water inlet pipeline.
4. A power plant thermodynamic system according to claim 1, further comprising:
the system comprises a boiler, a high-pressure cylinder, a medium-pressure cylinder, a low-pressure cylinder and a generator; the high pressure jar, the intermediate pressure jar, the low pressure jar with the generator concatenates in proper order, the boiler through first main steam pipeline with the high pressure jar intercommunication, the boiler through second main steam pipeline with the intermediate pressure jar intercommunication, the intermediate pressure jar through third main steam pipeline with the low pressure jar intercommunication.
5. A power plant thermodynamic system according to claim 4, further comprising: a high-pressure heating device; the high-pressure heating apparatus includes:
a first high pressure heater, a second high pressure heater and a third high pressure heater; the first high-pressure heater, the second high-pressure heater and the third high-pressure heater are connected in series step by step, the drainage section of the third high-pressure heater is communicated with the high drainage opening of the deaerator, and the water feeding section of the third high-pressure heater is communicated with the water outlet of the deaerator.
6. A power plant thermodynamic system as claimed in claim 5, wherein the first and second high pressure heaters are both in communication with a suction port of the high pressure cylinder, and the third high pressure heater is in communication with a suction port of the intermediate pressure cylinder.
7. A power plant thermodynamic system according to claim 4, wherein the low pressure heating device comprises:
the first low-pressure heater, the second low-pressure heater, the third low-pressure heater, the fourth low-pressure heater and the shaft seal heater; the first low-pressure heater, the second low-pressure heater, the third low-pressure heater, the fourth low-pressure heater and the shaft seal heater are connected in series step by step, the shaft seal heater is communicated with a low water feeding return port of the condenser, and a water draining section of the first low-pressure heater is communicated with a low water feeding drain port of the deaerator.
8. A power plant thermodynamic system as claimed in claim 7, wherein the second, third and fourth low pressure heaters are all in communication with a suction port of the low pressure cylinder, and the first low pressure heater is in communication with a suction port of the intermediate pressure cylinder.
9. A power plant thermodynamic system according to claim 4, wherein the rotor in the high pressure cylinder is connected to the rotor in the intermediate pressure cylinder by a first coupling; the rotor in the middle pressure cylinder is connected with the rotor in the low pressure cylinder through a second coupling; and the rotor in the low-pressure cylinder is connected with the rotor of the generator through a third coupler.
10. A power plant thermodynamic system as claimed in claim 1, wherein the condensate tank has an upper water distributor and a lower water distributor therein, the high temperature water discharge line and the high temperature water inlet line are both in communication with the upper water distributor, and the low temperature water discharge line and the low temperature water inlet line are both in communication with the lower water distributor.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109827166A (en) * | 2019-04-09 | 2019-05-31 | 北京国电蓝天节能科技开发有限公司 | A kind of power plant thermal system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109827166A (en) * | 2019-04-09 | 2019-05-31 | 北京国电蓝天节能科技开发有限公司 | A kind of power plant thermal system |
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