CN210264838U - Water-spraying temperature-reducing heat and power decoupling operation system of cogeneration unit - Google Patents
Water-spraying temperature-reducing heat and power decoupling operation system of cogeneration unit Download PDFInfo
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- CN210264838U CN210264838U CN201921250856.9U CN201921250856U CN210264838U CN 210264838 U CN210264838 U CN 210264838U CN 201921250856 U CN201921250856 U CN 201921250856U CN 210264838 U CN210264838 U CN 210264838U
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Abstract
The utility model discloses a water-spraying temperature-reducing heat and power decoupling operation system of a cogeneration unit, which is characterized in that a first water-spraying temperature reducer is additionally arranged on a steam pipeline between a boiler and a high-pressure cylinder to adjust the temperature of steam entering a high-pressure cylinder and further adjust the temperature of reheated steam entering a medium-pressure cylinder; when the temperature of the steam entering the intermediate pressure cylinder is different, the cylinder effect and the cold source loss are different; the proportion of the output power of the intermediate pressure cylinder for generating power and heating the circulating water of the heat supply network is adjusted by adjusting the temperature of the reheated steam entering the intermediate pressure cylinder, so that thermoelectric decoupling is realized. The technical proposal of the utility model is to reform the original system, with low reformation cost; in the commissioning process, under the running condition that the electric load is not changed, the temperature of the main steam can be flexibly adjusted according to different requirements of external heating loads to realize thermoelectric decoupling; through verification, the water spraying desuperheater is only additionally arranged on the main steam pipeline, and the power of heating heat supply network circulating water can be improved by about 15% under the condition that the electric load is not changed.
Description
[ technical field ] A method for producing a semiconductor device
The utility model belongs to the combined heat and power generation field, concretely relates to combined heat and power generation unit heat and power decoupling zero operating system of water spray cooling.
[ background of the invention ]
In the northern area of China, particularly in the northeast area which is severe cold in winter, a large number of high-pressure series are provided, including steam turbines of 100MW grade, ultrahigh pressure 135MW grade, ultrahigh pressure 200MW grade, subcritical 300MW grade and supercritical 350MW grade; in order to fully utilize energy, the medium-large heating and heat-supplying steam turbine unit is subjected to high-back-pressure circulating water heat supply transformation. The improved unit completely runs in a mode of 'fixing power by heat', namely, after the heat supply load of a power plant is determined, the power generation load of the power plant is fixed, and the power generation load of the power plant cannot be changed for ensuring heat supply, so that the flexibility of the power generation amount of the power plant is greatly restricted, and the peak regulation capacity of the improved unit is very limited compared with that of pure condensation running, and the defect is overcome by adopting a thermoelectric decoupling technology.
The existing common thermoelectric decoupling methods comprise a bypass compensation heat supply thermoelectric decoupling technology, a heat storage compensation heat supply thermoelectric decoupling technology, an electric heating compensation heat supply thermoelectric decoupling technology and the like, but have the defects of low energy efficiency, large investment and the like; in order to improve the flexibility of the thermoelectric unit and aim at a high-back-pressure heat supply unit, a new thermoelectric decoupling operation system needs to be developed.
[ Utility model ] content
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a combined heat and power units heat and power decoupling zero operating system of water spray cooling. The steam inlet pipeline of the high-pressure cylinder and the steam inlet pipeline of the intermediate-pressure cylinder are additionally provided with the water spray desuperheater, so that the cylinder effect of the intermediate-pressure cylinder is adjusted, the energy distribution ratio of the output of the intermediate-pressure cylinder is further adjusted, and thermoelectric decoupling is realized.
In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:
a water spray desuperheating heat and power cogeneration unit heat and power decoupling operation system comprises: the system comprises a boiler, a primary steam output pipeline of the boiler is communicated with a primary steam input end of a high-pressure cylinder, a primary steam output end of the high-pressure cylinder is communicated with a reheat steam input end of the boiler, a reheat steam output end of the boiler is communicated with a reheat steam input end of an intermediate-pressure cylinder, and a reheat steam output end of the intermediate-pressure cylinder is communicated with a reheat steam input end of a low-pressure cylinder; the power output end of the low pressure cylinder is communicated to the power input end of the generator; a reheating steam pipeline between the intermediate pressure cylinder and the low pressure cylinder is provided with a branch which leads to the heat supply network heater; a first water spraying desuperheater is arranged on a steam pipeline between the boiler and the high-pressure cylinder.
The utility model discloses a further improvement lies in:
preferably, a second water spray desuperheater is arranged on a reheating steam pipeline between the boiler and the intermediate pressure cylinder.
Preferably, the first and second water spray desuperheaters are water spray desuperheaters capable of adjusting the amount of water sprayed.
Preferably, the first and second water spray desuperheaters are any one of venturi type, vortex type, or perforated spray pipe type.
Preferably, a reheat steam output pipeline of the low pressure cylinder is communicated to the condenser.
Preferably, the condenser is provided with a heat supply network circulating water input end, a heat supply network circulating water output end and a condensed water output end; the heat supply network circulating water output end of the condenser is communicated with the heat supply network circulating water input end of the heat supply network heater; the condensed water output end is communicated to a drainage system.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses a water-spraying temperature-reducing heat and power decoupling operation system of a cogeneration unit, which is characterized in that a first water-spraying temperature reducer is additionally arranged on a steam pipeline between a boiler and a high-pressure cylinder to adjust the temperature of steam entering a high-pressure cylinder and further adjust the temperature of reheated steam entering a medium-pressure cylinder; when the temperature of the steam entering the intermediate pressure cylinder is different, the cylinder effect and the cold source loss are different; the proportion of the output power of the intermediate pressure cylinder for generating power and heating the circulating water of the heat supply network is adjusted by adjusting the temperature of the reheated steam entering the intermediate pressure cylinder, so that thermoelectric decoupling is realized. The technical proposal of the utility model is to reform the original system, with low reformation cost; in the commissioning process, under the running condition that the electric load is not changed, the temperature of the main steam can be flexibly adjusted according to different requirements of external heating loads to realize thermoelectric decoupling; through verification, the water spraying desuperheater is only additionally arranged on the main steam pipeline, and the power of heating heat supply network circulating water can be improved by about 15% under the condition that the electric load is not changed.
Furthermore, the reheating steam pipeline between the boiler and the intermediate pressure cylinder is provided with a second water spray desuperheater, so that the temperature of the reheating steam entering the intermediate pressure cylinder for acting can be further adjusted; verification shows that the power of the circulating water of the heating heat supply network can be improved by about 7% only by adjusting the temperature of the reheated steam; when the two water spraying desuperheaters adjust the steam temperature, the power of heating heat supply network circulating water can be improved by about 20%.
Furthermore, the water spraying amount and the water spraying temperature of the two water spraying desuperheaters can be flexibly adjusted according to different requirements on external heating heat load.
Furthermore, the two water spray desuperheaters have multiple selection types, large temperature regulation amplitude (up to 50-65 ℃), and sensitive temperature regulation.
Furthermore, the reheated steam enters the condenser after acting in the low-pressure cylinder, and is discharged after being condensed in the condenser.
Furthermore, the utility model discloses a heating network circulating water is heated by the steam extraction of low pressure jar in the condenser at first, gets into the heating network heater and is further heated; the heat supply network circulating water is mainly heated in the condenser, and the residual heating amplitude is completed in the heat supply network heater according to the actual requirement.
[ description of the drawings ]
FIG. 1 is a structural diagram of a heat and power decoupling operation system of the water spray temperature reduction cogeneration unit of the present invention;
FIG. 2 is an implementation effect diagram of the heat and power decoupling operation system of the water spray temperature reduction cogeneration unit of the utility model;
wherein: 1-a first water spray desuperheater; 2-high pressure cylinder; 3-a second water spray desuperheater; 4-intermediate pressure cylinder; 5-low pressure cylinder; 6-a generator; 7-a condenser; 8-a heat supply network heater; 9-boiler.
[ detailed description ] embodiments
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1, the utility model discloses a combined heat and power generation unit heat and power decoupling zero operating system that water spray desuperheated, include: the system comprises a first water spray desuperheater 1, a high-pressure cylinder 2, a second water spray desuperheater 3, an intermediate pressure cylinder 4, a low-pressure cylinder 5, a generator 6, a condenser 7, a heating network heater 8 and a boiler 9.
A primary steam output pipeline of the boiler 9 is communicated with a primary steam output pipeline of the high-pressure cylinder 2, and a first water spray desuperheater 1 is arranged on the primary steam pipeline between the boiler 9 and the high-pressure cylinder 2 and used for adjusting the steam inlet temperature of the high-pressure cylinder 2; a primary steam discharge pipeline of the high-pressure cylinder 2 is communicated with a reheat steam input pipeline of a boiler 9, a reheat steam output pipeline of the boiler 9 is communicated with a reheat steam input pipeline of the intermediate-pressure cylinder 4, and a second water spray desuperheater 3 is arranged on the boiler 9 and the reheat steam pipeline of the intermediate-pressure cylinder 4 and is used for adjusting the entry temperature of the reheat steam of the intermediate-pressure cylinder 4; the reheat steam output pipeline of the intermediate pressure cylinder 4 is divided into two paths, one path is communicated with the reheat steam input pipeline of the low pressure cylinder 5, enters the low pressure cylinder 5 to drive the low pressure cylinder 5 to operate, and the power output end of the low pressure cylinder 5 drives the generator 6 to generate electricity; the other path is communicated with a reheat steam input pipeline of the heat supply network heater 8; the low pressure cylinder 5 is provided with two paths of steam output pipelines which are both communicated with the condenser 7, and the two paths of steam output pipelines exchange heat with circulating water of a heat supply network in the condenser 7 and are condensed into water to be discharged; the condenser 7 is provided with a heat supply network circulating water input pipeline and an output pipeline which are communicated with the heat supply network heater 8; the heat supply network circulating water exchanges heat with the reheated steam output by the low pressure cylinder 5 in the condenser 7, and enters the heat supply network heater 8 after the temperature is raised; the steam input end of the heat supply network heater 8 is connected with the branch of the steam discharge pipeline of the intermediate pressure cylinder 4, and the heat supply network circulating water is discharged to supply heat to the outside after exchanging heat with a part of the steam discharged by the intermediate pressure cylinder 4 in the heat supply network heater 8.
The water spraying amount and the water temperature of the first water spraying desuperheater 1 and the second water spraying desuperheater 3 can be adjusted according to the rising temperature of the circulating water of the water network in the heat network heater 8; the first water spray desuperheater 1 and the second water spray desuperheater 3 can be of a Venturi type, a vortex type or a porous spray pipe type according to actual conditions.
The design principle of the utility model is as follows: the heat energy brought by the steam of the intermediate pressure cylinder 4 is Q, the output of the intermediate pressure cylinder is two parts, one part is used for driving the low pressure cylinder 5 to operate, and the heat energy is Q1(ii) a The other part of the circulating water enters the heat supply network heater 8 and is used for heating the circulating water of the heat supply network entering the heat supply network heater 8, and the heat energy is Q2，Q≈Q1+Q2The cylinder effect η of the intermediate pressure cylinder 4 is Q1One of the main influencing factors of the cylinder effect η is the steam inlet temperature of the intermediate pressure cylinder 4, the steam inlet temperature is increased, the cylinder effect η is increased, the steam inlet temperature is decreased, the cylinder effect η is decreased, namely the Q of the intermediate pressure cylinder 4 for outputting heat energy can be adjusted by adjusting the steam inlet temperature of the intermediate pressure cylinder 41And Q2The proportion size; therefore, under the running condition that the electric load is unchanged in the commissioning process, the temperature of the main steam and the temperature of the reheated steam can be flexibly adjusted according to different requirements of external heating loads to realize thermoelectric decoupling.
Referring to fig. 2, the operation shows that the water spray desuperheater is only additionally arranged on the main steam pipeline, and the power of the heating heat supply network circulating water can be improved by about 15% under the condition that the electric load is not changed; only the temperature of the reheated steam is adjusted, and the power of the circulating water of the heating heat supply network can be improved by about 7 percent; when the two water spraying desuperheaters adjust the steam temperature, the power of heating heat supply network circulating water can be improved by about 20%. While thermoelectric decoupling is realized, the power of heating the circulating water of the heat supply network can be adjusted according to the heat load requirement.
The utility model discloses a working process:
the steam output by the boiler 9 enters the high pressure cylinder 2 to do work after the temperature of the steam is adjusted by the first water spraying desuperheater 1; the steam discharged from the high-pressure cylinder 2 enters a boiler 9 to be reheated to form reheated steam; the reheated steam enters the intermediate pressure cylinder 4 after being adjusted in temperature by the second water spray desuperheater 3; the exhaust steam of the intermediate pressure cylinder 4 is divided into two paths, one path enters the low pressure cylinder 5 to drive the low pressure cylinder 5 to operate, and the low pressure cylinder 5 drives the generator 6 to work; the other path is introduced into a heat supply network heater 8 to heat the circulating water of the heat supply network;
the heat supply network circulating water firstly enters a condenser 7 and is heated by the exhaust steam of the low-pressure cylinder 5, and then enters a heat supply network heater 8 and is heated by part of the steam discharged by the intermediate-pressure cylinder 4; the heat supply network circulating water is mainly heated in the condenser 7, and when the heat supply network circulating water from the condenser 7 meets the heat load requirement, the heat supply network circulating water is not heated in the heat supply network heater 8 and is directly used for heat supply; when the heat supply network circulating water from the condenser 7 cannot meet the heat load requirement, the heat supply network heater 8 is continuously heated, and the water spraying amount and the water spraying temperature of the first water spraying desuperheater 1 and the second water spraying desuperheater 3 are adjusted according to the heated temperature of the heat supply network circulating water, so that the cylinder effect of the intermediate pressure cylinder 4 is adjusted, namely the power of the intermediate pressure cylinder 4 for heating the heat supply network circulating water is adjusted.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A water spray desuperheating heat and power cogeneration unit heat and power decoupling operation system is characterized by comprising: the system comprises a boiler (9), a primary steam output pipeline of the boiler (9) is communicated with a primary steam input end of a high-pressure cylinder (2), a primary steam output end of the high-pressure cylinder (2) is communicated with a reheat steam input end of the boiler (9), a reheat steam output end of the boiler (9) is communicated with a reheat steam input end of an intermediate pressure cylinder (4), and a reheat steam output end of the intermediate pressure cylinder (4) is communicated with a reheat steam input end of a low-pressure cylinder (5); the power output end of the low pressure cylinder (5) is communicated to the power input end of the generator (6); a reheating steam pipeline between the intermediate pressure cylinder (4) and the low pressure cylinder (5) is provided with a branch leading to a heat supply network heater (8); a first water spray desuperheater (1) is arranged on a steam pipeline between the boiler (9) and the high-pressure cylinder (2).
2. A water spray desuperheating heat and power cogeneration unit decoupling operation system as claimed in claim 1, wherein a second water spray desuperheater (3) is provided on the reheat steam line between the boiler (9) and the intermediate pressure cylinder (4).
3. A water spray desuperheater cogeneration unit heat and power decoupling operation system according to claim 2, wherein the first water spray desuperheater (1) and the second water spray desuperheater (3) are water spray desuperheaters capable of adjusting water spray amount.
4. A water spray desuperheated co-generation unit decoupling heat and power operation system according to claim 2, wherein the first water spray desuperheater (1) and the second water spray desuperheater (3) are any one of venturi type, vortex type or perforated spray pipe type.
5. The water-spraying temperature-reducing heat and power decoupling operation system of the cogeneration unit according to claim 1, wherein a reheat steam output pipeline of the low pressure cylinder (5) is communicated to the condenser (7).
6. The water-spraying temperature-reducing heat and power decoupling operation system of the cogeneration unit according to claim 5, wherein the condenser (7) is provided with a heat supply network circulating water input end, a heat supply network circulating water output end and a condensed water output end; the heat supply network circulating water output end of the condenser (7) is communicated with the heat supply network circulating water input end of the heat supply network heater (8); the condensed water output end is communicated to a drainage system.
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| CN201921250856.9U CN210264838U (en) | 2019-08-02 | 2019-08-02 | Water-spraying temperature-reducing heat and power decoupling operation system of cogeneration unit |
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| CN201921250856.9U CN210264838U (en) | 2019-08-02 | 2019-08-02 | Water-spraying temperature-reducing heat and power decoupling operation system of cogeneration unit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110318832A (en) * | 2019-08-02 | 2019-10-11 | 西安西热节能技术有限公司 | A kind of cogeneration units thermoelectricity decoupling operating system of spray desuperheating |
| CN112344413A (en) * | 2020-10-30 | 2021-02-09 | 广西电网有限责任公司电力科学研究院 | Low-pressure steam source boosting and heat supplying method for cogeneration unit |
-
2019
- 2019-08-02 CN CN201921250856.9U patent/CN210264838U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110318832A (en) * | 2019-08-02 | 2019-10-11 | 西安西热节能技术有限公司 | A kind of cogeneration units thermoelectricity decoupling operating system of spray desuperheating |
| CN110318832B (en) * | 2019-08-02 | 2024-01-23 | 西安西热节能技术有限公司 | Water spray temperature reduction thermal power cogeneration unit thermal electrolytic coupling operation system |
| CN112344413A (en) * | 2020-10-30 | 2021-02-09 | 广西电网有限责任公司电力科学研究院 | Low-pressure steam source boosting and heat supplying method for cogeneration unit |
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