CN214370493U - Intelligent adjustment exhaust steam upgrading heat energy gradient utilization heating system - Google Patents
Intelligent adjustment exhaust steam upgrading heat energy gradient utilization heating system Download PDFInfo
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Abstract
The utility model provides an intelligent regulation exhaust steam upgrading heat energy cascade utilization heating system, which comprises a steam turbine, a steam turbine condenser or a steam turbine high back pressure condenser connected with the exhaust end of a steam turbine low pressure cylinder through a low pressure cylinder exhaust steam connecting pipeline, an exhaust steam upgrading heat energy cascade utilization heating component and a controller; the utility model relates to a simple reasonable gets into steam turbine condenser or steam turbine high back pressure condenser earlier through the heat supply network return water and carries out the first order heating, later gets into the exhaust steam again and carries out the second level heating with upgrading heat energy step and utilize heating element, later gets into the heat supply network heater again and carries out the third level heating. Utilize tertiary heating to heat supply network circulating water, can reform transform better cooperation with high back pressure to further retrieve more steam turbine exhaust steam latent heats and obtain the steam that is used for heating the heat supply network circulating water of suitable pressure, saved the use amount of high-quality well exhaust steam, avoided energy loss, improved power plant's heat economy nature greatly.
Description
Technical Field
The utility model relates to an exhaust steam heating field especially relates to an intelligent regulation exhaust steam improves matter heat energy cascade and utilizes heating system.
Background
The cold end loss of a thermal power plant is the maximum loss of a thermodynamic system of the power plant, and the energy-saving technical idea of centralized heating and gradient utilization of heat energy is embodied by the waste steam recovery heating transformation; the method conforms to the key development technical category of energy conservation and comprehensive utilization of resources. The combined heat and power generation is adopted as the support of the heat source, and the steam exhaust recovery and the upgrading heat supply modification of the power plant unit meet the relevant national industrial policies.
After the steam turbine set is transformed by high back pressure, the back pressure can be increased to 0.04-0.054 MPa, the safety of the steam turbine and auxiliary machines thereof is not greatly influenced, and the temperature of a cooling water outlet can reach 72-80 ℃. The following problems also exist:
(1) because the exhaust steam volume is large and the water volume of the heating network is limited, double water sources are still needed, namely, the circulating water of the heating network and the circulating cooling water of the original steam turbine operate together to cool and exhaust steam.
(2) Under the condition of large heat load, in order to ensure the temperature of the circulating water of the heat supply network, the circulating water of the heat supply network is heated in the heater of the heat supply network by using the intermediate exhaust steam, so that the circulating water of the heat supply network meets the requirement of heat supply temperature.
(3) For the unit after high back pressure transformation, the back pressure is improved too much, which greatly improves the coal consumption of the unit and also affects the safety of the steam turbine equipment and the auxiliary machines thereof.
(4) The backpressure heating load of the steam turbine is determined, and the load of the unit cannot be flexibly adjusted.
(5) The recovery steam quantity is smaller when the water supply quantity of the heat supply network is small, and the investment recovery period is long, so the modification willingness of the power plant is low.
SUMMERY OF THE UTILITY MODEL
An insufficient to the above-mentioned prior art, the utility model aims to provide an intelligent regulation exhaust steam improves matter heat energy step and utilizes heating system can transform better cooperation with high back pressure to further retrieve more steam turbine exhaust steam latent heat, reduced the cold junction loss, saved the use of high-quality steam, improved power plant's heat economy nature greatly.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an intelligent regulation exhaust steam upgrading heat energy cascade utilization heating system comprises a steam turbine, a steam turbine condenser or a steam turbine high back pressure condenser connected with the exhaust end of a low-pressure cylinder of the steam turbine through a low-pressure cylinder exhaust steam connecting pipeline, an exhaust steam upgrading heat energy cascade utilization heating assembly and a controller;
the exhaust steam upgrading heat energy cascade utilizes heating element to include the venturi device and the heat exchanger of being connected with venturi device jet, venturi device power steam inlet end is connected through the first steam extraction pipe of well row in with the steam turbine steam exhaust end, just venturi device suction mouth end is connected with low pressure jar steam exhaust connecting tube through low pressure jar exhaust steam pipe, heat exchanger intake end passes through steam turbine condenser or the high back pressure condenser of steam turbine and is connected with heat supply network return water pipe, just heat exchanger drain end is connected with steam turbine condenser or the high back pressure condenser of steam turbine, heat exchanger water outlet end is connected with the heat supply network heater, heat supply network heater steam inlet end is connected through the second steam extraction pipe of well row in with the steam turbine steam exhaust end.
The utility model discloses a preferred embodiment, well row of gate valve and well row's dish valve have set gradually on the well row of first steam extraction pipe, exhaust steam gate valve and exhaust steam dish valve have set gradually on the low pressure cylinder exhaust steam pipe, install control mechanism on the venturi device, heat supply network return water pipe and heat supply network heater 10 water outlet end all are provided with temperature sensor, well row of gate valve, well row of dish valve, exhaust steam gate valve, exhaust steam dish valve, control mechanism and temperature sensor all are connected with the controller.
In a preferred embodiment of the present invention, a valve is disposed on the middle exhaust second steam extraction duct, and the valve is connected to the controller.
In a preferred embodiment of the present invention, the exhaust end of the low pressure cylinder of the steam turbine and the exhaust steam end of the steam turbine are both provided with sensors, and the sensors are connected with the controller.
Through the technical scheme, the utility model discloses following beneficial effect has:
the utility model relates to a simple reasonable gets into steam turbine condenser or steam turbine high back pressure condenser earlier through the heat supply network return water and carries out the first order heating, later gets into the exhaust steam again and carries out the second level heating with upgrading heat energy step and utilize heating element, later gets into the heat supply network heater again and carries out the third level heating. Utilize tertiary heating to heat supply network circulating water, can reform transform better cooperation with high back pressure to further retrieve more steam turbine exhaust steam latent heats and acquire the steam that is used for heating the heat supply network circulating water of suitable pressure, saved the use amount of exhaust steam in the high-quality, avoided energy loss, improved power plant's heat economy nature greatly, the practicality is strong.
Drawings
FIG. 1 is a schematic diagram of an overall structure of a heating system for intelligently adjusting steam exhaust upgrading heat energy cascade utilization.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.
The terminology used in the description is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
As shown in fig. 1, an embodiment of the present invention is shown for an intelligent regulated waste steam upgraded heat energy cascade heating system. In this embodiment, the heating system includes a steam turbine 1, a steam turbine condenser or a steam turbine high back pressure condenser 3 connected to the exhaust end of the low pressure cylinder of the steam turbine 1 through a low pressure cylinder exhaust connecting pipe 2, a steam exhaust upgrading heat energy gradient utilization heating component 4 and a controller 5;
the waste steam upgrading heat energy cascade utilization heating assembly 4 comprises a Venturi device 6 and a heat exchanger 7 connected with an injection port of the Venturi device 6, the Venturi device 6 adopts a Venturi tube, the power steam inlet end of the Venturi device 6 is connected with the middle exhaust steam end of the steam turbine 1 through a middle exhaust first steam extraction conduit 8, and the suction port end of the Venturi device 6 is connected with the low-pressure cylinder steam exhaust connecting pipeline 2 through a low-pressure cylinder steam exhaust conduit 9, the water inlet end of the heat exchanger 7 is connected with a heat supply network water return pipeline through a turbine condenser or a turbine high back pressure condenser 3, and the drain end of the heat exchanger 7 is connected with a turbine condenser or a turbine high back pressure condenser 3, the water outlet end of the heat exchanger 7 is connected with a heat supply network heater 10, and the steam inlet end of the heat supply network heater 10 is connected with the middle exhaust steam end of the steam turbine 1 through a middle exhaust second steam extraction guide pipe 19.
In this embodiment, well row's gate valve 11 and well row's dish valve 12 have set gradually on the first extraction steam pipe 8 of well row, exhaust steam gate valve 13 and exhaust steam dish valve 14 have set gradually on the low pressure cylinder exhaust steam pipe 9, install control mechanism 15 on the venturi device 6, heat supply network return water pipeline and heat supply network heater 10 play water end are provided with temperature sensor 16 and temperature sensor 20 respectively, well row's gate valve 11, well row's dish valve 12, exhaust steam gate valve 13, exhaust steam dish valve 14, control mechanism 15 and temperature sensor 16, 20 all are connected with controller 5. The controller 5 receives a return water temperature signal and an outlet water temperature signal detected by a temperature sensor 20 on the water outlet end of the heat supply network return pipeline and the heat supply network heater 10, correspondingly controls the middle discharge gate valve 11, the middle discharge butterfly valve 12, the exhaust steam gate valve 13, the exhaust steam butterfly valve 14 and the control mechanism 15, and realizes the automatic regulation of the power steam flow and the suction steam flow of the Venturi device 6.
In this embodiment, a valve 17 is disposed on the middle exhaust second steam extraction duct 19, and the valve 17 is connected to the controller 5. The controller 5 receives temperature signals detected by the temperature sensors 20 on the water outlet ends of the heat supply network water return pipeline and the heat supply network heater 10 and correspondingly controls the valve 17, so that the adjustment of the steam suction amount of the heat supply network heater 10 is realized, and the requirements of users under different conditions are met.
In the present embodiment, the exhaust end of the low pressure cylinder of the steam turbine 1 and the exhaust end of the steam turbine 1 are provided with sensors 18, and the sensors 18 are connected with the controller 5. The controller 5 receives signals of the exhaust pressure of the low-pressure cylinder of the steam turbine 1 and the exhaust pressure of the exhaust steam end of the steam turbine 1 detected by the sensor 18, so that the intermediate exhaust gate valve 11, the intermediate exhaust butterfly valve 12, the exhaust steam gate valve 13, the exhaust steam butterfly valve 14 and the control mechanism 15 are correspondingly controlled, and the automatic adjustment of the exhaust pressure of the low-pressure cylinder of the steam turbine 1 is realized.
The utility model discloses specific intelligent regulation principle as follows:
the system adopts an internal-external combined regulating mechanism to control the actual water supply temperature of the circulating water of the heat supply network, when the water supply temperature of the heat supply network is reduced, the temperature sensor 20 at the water outlet end of the heat supply network heater 10 transmits a detected temperature signal to the controller 5, and the controller 5 sends a regulating instruction to enlarge the control mechanism 15 on the venturi device 6, increase the output of the venturi device 6, return the temperature of the heat supply network to a normal value, and restore the temperature to normal, otherwise, the system can also realize automatic regulation. When the temperature of the return water of the heat supply network is reduced, the temperature sensor 16 on the return water pipeline of the heat supply network transmits a detected temperature signal to the controller 5, and the controller 5 sends out an adjusting instruction to open the control mechanism 15 on the venturi device 6, so that the output of the venturi device 6 is increased, the temperature of the heat supply network is returned to a normal value, and the temperature is returned to normal. Conversely, automatic adjustment can be realized as well.
When the pressure of the exhaust steam in the steam turbine 1 and the exhaust steam of the low-pressure cylinder of the steam turbine 1 is increased, the sensor 18 detects a pressure signal and transmits the pressure signal to the controller 5, and a calculation program of the controller 5 can automatically analyze and calculate according to the change trend of the exhaust pressure, the flow and the temperature of the exhaust steam of the medium-pressure cylinder and the low-pressure cylinder, so that an adjusting instruction is given. Under the combined cooperation of the middle-row gate valve 11, the middle-row butterfly valve 12, the exhaust steam gate valve 13, the exhaust steam butterfly valve 14 and the control mechanism 15, the pressure, the temperature and the flow of the steam at the outlet of the Venturi device 6 are ensured, so that the requirement of a heat user on the temperature of the heat supply network water is met.
When the return water of the heat supply network does not meet the user requirement after being heated by the first two stages, the controller 5 controls the valve 17 to be opened greatly, the steam flow of the heat supply network heater 10 is increased, and the temperature of the return water of the heat supply network is continuously raised by utilizing the exhaust steam in the steam turbine 1 until the user requirement is met.
When the intelligent regulation exhaust steam upgrading heat gradient utilization and transformation system is applied to a wet cooling unit and various air cooling units.
Compared with the prior art, the utility model discloses an utilize tertiary heating to heat supply network circulating water to heat, can reform transform better cooperation with high back pressure to further retrieve more steam turbine exhaust steam latent heat, and acquire the steam that is used for heating the heat supply network circulating water of suitable pressure, saved the use amount of high-quality well steam extraction, avoided energy loss, improved power plant's heat economy nature greatly, the practicality is strong.
The foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the present invention in any way and in any way, and it should be understood that modifications and additions may be made by those skilled in the art without departing from the method of the present invention, and such modifications and additions are also considered to be within the scope of the present invention. Those skilled in the art can make various changes, modifications and evolutions equivalent to those made by the above-disclosed technical content without departing from the spirit and scope of the present invention, and all such changes, modifications and evolutions are equivalent embodiments of the present invention; meanwhile, any changes, modifications and evolutions of equivalent changes to the above embodiments according to the actual technology of the present invention are also within the scope of the technical solution of the present invention.
Claims (4)
1. An intelligent regulation exhaust steam upgrading heat energy cascade utilization heating system comprises a steam turbine, a steam turbine condenser or a steam turbine high back pressure condenser connected with the exhaust end of a low-pressure cylinder of the steam turbine through a low-pressure cylinder exhaust steam connecting pipeline, an exhaust steam upgrading heat energy cascade utilization heating assembly and a controller;
the method is characterized in that: the exhaust steam upgrading heat energy cascade utilizes heating element to include the venturi device and the heat exchanger of being connected with venturi device jet, venturi device power steam inlet end is connected through the first steam extraction pipe of well row in with the steam turbine steam exhaust end, just venturi device suction mouth end is connected with low pressure jar steam exhaust connecting tube through low pressure jar exhaust steam pipe, heat exchanger intake end passes through steam turbine condenser or the high back pressure condenser of steam turbine and is connected with heat supply network return water pipe, just heat exchanger drain end is connected with steam turbine condenser or the high back pressure condenser of steam turbine, heat exchanger water outlet end is connected with the heat supply network heater, heat supply network heater steam inlet end is connected through the second steam extraction pipe of well row in with the steam turbine steam exhaust end.
2. The intelligent regulation exhaust steam upgrading heat energy cascade utilization heating system according to claim 1, wherein a middle-row gate valve and a middle-row butterfly valve are sequentially arranged on the middle-row first steam extraction guide pipe, an exhaust steam gate valve and an exhaust steam butterfly valve are sequentially arranged on the low-pressure cylinder exhaust steam guide pipe, a control mechanism is installed on the venturi device, temperature sensors are arranged at water outlet ends of the heat supply network water return pipeline and the heat supply network heater, and the middle-row gate valve, the middle-row butterfly valve, the exhaust steam gate valve, the exhaust steam butterfly valve, the control mechanism and the temperature sensors are all connected with a controller.
3. The intelligent regulated waste steam upgraded heat energy cascade heating system of claim 1, wherein a valve is disposed on the middle exhaust second steam extraction conduit, and the valve is connected to the controller.
4. The intelligent regulation exhaust steam upgrading heat energy cascade heating system according to claim 1, wherein sensors are arranged at the exhaust end of the low-pressure cylinder of the steam turbine and the exhaust steam end of the middle-pressure cylinder of the steam turbine, and the sensors are connected with a controller.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120310366.4U CN214370493U (en) | 2021-02-03 | 2021-02-03 | Intelligent adjustment exhaust steam upgrading heat energy gradient utilization heating system |
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| CN202120310366.4U CN214370493U (en) | 2021-02-03 | 2021-02-03 | Intelligent adjustment exhaust steam upgrading heat energy gradient utilization heating system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112762499A (en) * | 2021-02-03 | 2021-05-07 | 上海舟虹电力工程技术中心 | Heating method for intelligently adjusting gradient utilization of waste steam upgrading heat energy |
| CN114941554A (en) * | 2022-05-09 | 2022-08-26 | 中国船舶重工集团公司第七0三研究所 | Energy cascade system for cogeneration of heating steam and utilization method |
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2021
- 2021-02-03 CN CN202120310366.4U patent/CN214370493U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112762499A (en) * | 2021-02-03 | 2021-05-07 | 上海舟虹电力工程技术中心 | Heating method for intelligently adjusting gradient utilization of waste steam upgrading heat energy |
| CN114941554A (en) * | 2022-05-09 | 2022-08-26 | 中国船舶重工集团公司第七0三研究所 | Energy cascade system for cogeneration of heating steam and utilization method |
| CN114941554B (en) * | 2022-05-09 | 2023-09-08 | 中国船舶重工集团公司第七0三研究所 | Cascade system for heating steam to carry out heat and electricity combined energy and utilization method |
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Effective date of registration: 20211129 Address after: 200335 floor 5, No. 277, Huqingping Road, Minhang District, Shanghai Patentee after: BOCO (Shanghai) Power Engineering Control Co., Ltd Address before: 201412 room 2093, building 1, No. 605, Antai Road, Situan Town, Fengxian District, Shanghai Patentee before: Shanghai Zhouhong Electric Power Engineering Technology Center |