CN111121481A - Dry-wet combined cooling and steam exhaust direct heat supply efficient condenser system and use method thereof - Google Patents
Dry-wet combined cooling and steam exhaust direct heat supply efficient condenser system and use method thereof Download PDFInfo
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- CN111121481A CN111121481A CN201911312789.3A CN201911312789A CN111121481A CN 111121481 A CN111121481 A CN 111121481A CN 201911312789 A CN201911312789 A CN 201911312789A CN 111121481 A CN111121481 A CN 111121481A
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- 238000001816 cooling Methods 0.000 title claims abstract description 82
- 238000000034 method Methods 0.000 title claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 91
- 239000000498 cooling water Substances 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B7/00—Combinations of two or more condensers, e.g. provision of reserve condenser
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/02—Hot-water central heating systems with forced circulation, e.g. by pumps
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Abstract
The invention belongs to the technical field of heating systems, and particularly relates to a dry-wet combined cooling exhaust steam direct heating efficient condenser system and a using method thereof. Including the steam turbine, the air cooling condenser, the air cooling island, wet-type high efficiency condenser, heat supply network circulating water pump, heat supply network heater and auxiliary engine circulating water pump, auxiliary engine circulating water cooling tower, the steam turbine is connected with air condenser, air condenser connects wet-type high efficiency condenser and air cooling island respectively through the parallelly connected mode of pipeline, be equipped with circulating water pipeline in the wet-type high efficiency condenser, circulating water pipeline's entry is through pipe connection heat supply network circulating water pump and auxiliary engine circulating water pump respectively through parallelly connected mode, circulating water pipeline's export is through pipe connection heat supply network heater and auxiliary engine circulating water cooling tower respectively through parallelly connected mode, auxiliary engine circulating water pump passes through the pipe connection with auxiliary engine circulating water cooling tower. The invention can reduce the cold source loss of the cogeneration unit and meet the heat supply requirement.
Description
Technical Field
The invention belongs to the technical field of heating systems, and particularly relates to a dry-wet combined cooling exhaust steam direct heating efficient condenser system and a using method thereof.
Background
There is a large heat sink loss in the turbine operation. For the air cooling unit, the exhaust steam cooling of the steam turbine not only causes heat waste, but also needs to provide power through an air cooling fan, and the plant power consumption is increased.
The heat supply of the cogeneration unit is continuously increased by continuously promoting the northern centralized heat supply project. The environmental protection problem caused by the heat supply of the small boiler is more prominent, and the clean heat supply problem is more emphasized in recent years in large cities.
The method is an important subject for solving the heat supply requirement and clean heating by improving the heat supply capacity of the existing unit under the condition of not adding a new unit.
How to reduce the cold source loss in the electric power production process simultaneously, high efficiency, low investment utilize cold junction heat to reach and increase unit heating capacity simultaneously is the difficult problem that needs to solve urgently. Therefore, a dry-wet combined cooling and steam exhaust direct heat supply efficient condenser system is provided.
Disclosure of Invention
The invention provides a dry-wet combined cooling exhaust steam direct heat supply efficient condenser system and a using method thereof, aiming at increasing heat supply requirements and more cold source losses of the existing cogeneration unit, a steam turbine is utilized to heat part of exhaust steam to 65 ℃ for circulating water of a heat supply network, and the cooled exhaust steam of the steam turbine is subjected to next thermodynamic circulation.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a dry and wet combined cooling steam exhaust direct heat supply high efficiency condenser system, including the steam turbine, the air cooling condenser, the air cooling island, wet-type high efficiency condenser, heat supply network circulating water pump, the heat supply network heater, auxiliary engine circulating water pump, auxiliary engine circulating water cooling tower, the steam turbine is connected with air condenser, wet-type high efficiency condenser and air cooling island are connected respectively to air condenser through the parallelly connected mode of pipeline, be equipped with circulating water pipeline in the wet-type high efficiency condenser, circulating water pipeline's entry is through pipe connection heat supply network circulating water pump and auxiliary engine circulating water pump respectively through parallelly connected mode, circulating water pipeline's export is through pipe connection heat supply network heater and auxiliary engine circulating water cooling tower respectively through parallelly connected mode, auxiliary engine circulating water pump passes through the pipe connection with auxiliary engine circulating water.
The use method of the dry-wet combined cooling exhaust direct heat supply high-efficiency condenser system comprises the following steps:
s1: in the heat supply period, the exhaust steam pressure of the steam turbine is increased, a high back pressure operation mode is adopted, partial exhaust steam of the steam turbine enters the wet-type efficient condenser through the air-cooled condenser and the pipeline, the circulating water of the heat supply network enters the wet-type efficient condenser through the circulating water pump of the heat supply network and is heated to 65 ℃, and the heated circulating water of the heat supply network enters the heat supply network heater and is continuously heated to the temperature required by a user of the heat supply network; after the exhaust steam entering the wet-type efficient condenser is cooled, condensed water is formed and enters the air-cooled condenser through a pipeline in a self-flowing mode; residual dead steam of the steam turbine enters the air cooling island for cooling through the air cooling condenser and a pipeline between the air cooling condenser and the air cooling island, and condensed water formed after cooling enters the air cooling condenser through the pipeline in a self-flowing mode;
s2: and in the non-heat supply period, reducing the exhaust pressure of the steam turbine to be close to the rated exhaust pressure, and adopting a normal back pressure operation mode. Partial exhaust steam of the steam turbine enters a wet-type efficient condenser through an air-cooled condenser and a pipeline, hot auxiliary machine circulating water of an auxiliary machine cooling water tower enters the wet-type efficient condenser through an auxiliary machine circulating water pump to absorb heat, and the heat-absorbed hot auxiliary machine circulating water releases heat through an auxiliary machine circulating water cooling tower to form circulation; after the exhaust steam entering the wet-type efficient condenser is cooled, condensed water is formed and enters the air-cooled condenser through a pipeline in a self-flowing mode; and residual dead steam of the steam turbine enters the air cooling island through the air cooling condenser and the pipeline for cooling, and condensed water formed after cooling automatically flows into the air cooling condenser through the pipeline.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, in the heat supply period, the exhaust steam pressure of the steam turbine is increased, a high back pressure operation mode is adopted, partial exhaust steam of the steam turbine enters the wet-type efficient condenser through the air-cooled condenser and the pipeline, so that the circulating water of the heat supply network enters the wet-type efficient condenser through the circulating water pump of the heat supply network and is heated to 65 ℃, and the heated circulating water of the heat supply network enters the heater of the heat supply network and is continuously heated to the temperature required by a user of the heat supply network; after the exhaust steam entering the wet-type efficient condenser is cooled, condensed water is formed and enters the air-cooled condenser through a pipeline in a self-flowing mode; and residual dead steam of the steam turbine enters the air cooling island for cooling through the air cooling condenser and a pipeline between the air cooling condenser and the air cooling island, and condensed water formed after cooling enters the air cooling condenser through the pipeline in a self-flowing mode. The system utilizes the cold end energy of the unit to improve the heat supply capacity of the unit, and greatly reduces the cogeneration energy consumption of the unit. For a typical heat supply network circulating water flow rate of 8000t/h heat supply unit, according to the method, the heat of a cold end system of a steam turbine can be utilized to be about 130MW, and the heat supply area can be increased to be about 260 ten thousand square meters.
Drawings
FIG. 1 is a schematic structural diagram of a dry-wet combined cooling and steam-discharging direct heat-supply efficient condenser system.
Wherein: the system comprises a 1-steam turbine, a 2-air cooling condenser, a 3-air cooling island, a 4-wet type efficient condenser, a 5-heat supply network circulating water pump, a 6-heat supply network heater, a 7-auxiliary machine circulating water pump and an 8-auxiliary machine circulating water cooling tower.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, a dry-wet combined cooling exhaust direct heat supply high-efficiency condenser system comprises a steam turbine 1, an air-cooled condenser 2, an air-cooled island 3, a wet-type high-efficiency condenser 4, a heat supply network circulating water pump 5, a heat supply network heater 6, an auxiliary machine circulating water pump 7 and an auxiliary machine circulating water cooling tower 8, wherein the steam turbine 1 is connected with the air condenser 2, the air condenser 2 is respectively connected with the wet-type high-efficiency condenser 4 and the air-cooled island 3 in a pipeline parallel mode (namely the air-cooled island 3 is connected with the air condenser 2 after being connected with the wet-type high-efficiency condenser 4 in parallel), a circulating water pipeline is arranged in the wet-type high-efficiency condenser 4, an inlet of the circulating water pipeline is respectively connected with the heat supply network circulating water pump 5 and the auxiliary machine circulating water pump 7 in a pipeline parallel mode, an outlet of the circulating water pipeline, the auxiliary machine circulating water pump 7 is connected with the auxiliary machine circulating water cooling tower 8 through a pipeline (namely, one pipeline of the auxiliary machine circulating water cooling tower 8 is connected with the inlet of the circulating water pipeline through the auxiliary machine circulating water pump 7, and the other pipeline is directly connected with the outlet of the circulating water pipeline).
The use principle of the invention is as follows:
in the heat supply period, the exhaust steam pressure of the steam turbine 1 is increased, and a high back pressure operation mode is adopted. Partial exhaust steam of the steam turbine 1 enters the wet-type efficient condenser 4 through the air-cooled condenser 2, the air-cooled condenser 2 and the wet-type efficient condenser 4, circulating water returning of a heat supply network enters the wet-type efficient condenser 4 through the heat supply network circulating water pump 5 to be heated to 65 ℃, and the heated circulating water of the heat supply network enters the heat supply network heater 6 to be continuously heated to the temperature required by a heat supply network user. And the condensed water cooled by the wet high-efficiency condenser 4 enters the air-cooled condenser 2 through a pipeline in a self-flowing mode. The residual exhaust steam of the steam turbine 1 enters the air cooling island 3 through the air cooling condenser 2 and a pipeline between the air cooling condenser and the air cooling island 3 for cooling, and the cooled condensed water automatically flows into the air cooling condenser 2 through the pipeline.
In the non-heat supply period, the exhaust steam pressure of the steam turbine 1 is reduced to be close to the rated exhaust steam pressure, and a normal back pressure operation mode is adopted. Partial exhaust steam of the steam turbine 1 enters the wet-type efficient condenser 4 through the air-cooled condenser 2 and a pipeline between the air-cooled condenser 2 and the wet-type efficient condenser 4, water discharged from an auxiliary cooling water tower 8 enters the wet-type efficient condenser 4 through an auxiliary circulating water pump 7 to absorb heat, and heat auxiliary circulating water after absorbing heat releases heat through an auxiliary circulating water cooling tower 8 to form circulation. And the condensed water cooled by the wet high-efficiency condenser 4 enters the air-cooled condenser 2 through a pipeline in a self-flowing mode. The residual exhaust steam of the steam turbine 1 enters the air cooling island 3 through the air cooling condenser 2 and a pipeline between the air cooling condenser 2 and the air cooling island 3 for cooling, and the cooled condensed water automatically flows into the air cooling condenser 2 through the pipeline.
For a typical heat supply network circulating water flow rate of 8000t/h heat supply unit, according to the method, about 130MW of heat of a cold end system of a steam turbine can be utilized, and the heat supply area is increased by about 260 ten thousand square meters.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (2)
1. The utility model provides a dry wet high-efficient condenser system of direct heat supply of joint cooling steam extraction which characterized in that: comprises a steam turbine (1), an air-cooled condenser (2), an air-cooled island (3), a wet-type high-efficiency condenser (4), a heat supply network circulating water pump (5), a heat supply network heater (6), an auxiliary machine circulating water pump (7) and an auxiliary machine circulating water cooling tower (8), the steam turbine (1) is connected with an air condenser (2), the air condenser (2) is respectively connected with a wet-type high-efficiency condenser (4) and an air cooling island (3) in a pipeline parallel connection mode, a circulating water pipeline is arranged in the wet type high-efficiency condenser (4), the inlet of the circulating water pipeline is connected with a heat supply network circulating water pump (5) and an auxiliary machine circulating water pump (7) through pipelines respectively in a parallel connection mode, the outlet of the circulating water pipeline is respectively connected with a heat supply network heater (6) and an auxiliary machine circulating water cooling tower (8) through pipelines in a parallel connection mode, and the auxiliary machine circulating water pump (7) is connected with an auxiliary machine circulating water cooling tower (8) through a pipeline.
2. The use method of the dry-wet combined cooling exhaust steam direct heat supply high-efficiency condenser system according to claim 1 is characterized in that:
s1: in the heat supply period, the exhaust steam pressure of the steam turbine (1) is increased, a high back pressure operation mode is adopted, partial exhaust steam of the steam turbine (1) enters a wet-type efficient condenser (4) through an air-cooled condenser (2) and a pipeline, so that heat supply network circulating water enters the wet-type efficient condenser (4) through a heat supply network circulating water pump (5) to be heated to 65 ℃, and the heated heat supply network circulating water enters a heat supply network heater (6) to be continuously heated to the temperature required by a heat supply network user; after being cooled, the exhaust steam entering the wet high-efficiency condenser (4) forms condensed water which enters the air-cooled condenser (2) through a pipeline in a self-flowing mode; residual exhaust steam of the steam turbine (1) enters the air cooling island (3) through the air cooling condenser (2) and a pipeline between the air cooling condenser (2) and the air cooling island (3) for cooling, and condensed water formed after cooling enters the air cooling condenser (2) through the pipeline in a self-flowing mode;
s2: and in the non-heat supply period, reducing the exhaust steam pressure of the steam turbine (1) to be close to the rated exhaust steam pressure, and adopting a normal back pressure operation mode. Partial exhaust steam of the steam turbine (1) enters a wet-type efficient condenser (4) through an air-cooled condenser (2) and a pipeline, hot auxiliary machine circulating water of an auxiliary machine cooling water tower (8) enters the wet-type efficient condenser (4) through an auxiliary machine circulating water pump (7) to absorb heat, and the heat absorbed hot auxiliary machine circulating water releases heat through an auxiliary machine circulating water cooling tower (8) to form circulation; after being cooled, the exhaust steam entering the wet high-efficiency condenser (4) forms condensed water which enters the air-cooled condenser (2) through a pipeline in a self-flowing mode; and residual exhaust steam of the steam turbine (1) enters the air cooling island (3) through the air cooling condenser (2) and a pipeline for cooling, and condensed water formed after cooling automatically flows into the air cooling condenser (2) through the pipeline.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911312789.3A CN111121481A (en) | 2019-12-18 | 2019-12-18 | Dry-wet combined cooling and steam exhaust direct heat supply efficient condenser system and use method thereof |
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| CN201911312789.3A CN111121481A (en) | 2019-12-18 | 2019-12-18 | Dry-wet combined cooling and steam exhaust direct heat supply efficient condenser system and use method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113863999A (en) * | 2021-09-18 | 2021-12-31 | 西安热工研究院有限公司 | Cold source sharing system and method for dry-wet combined cooling and steam-electricity double-drive induced draft fan of direct air cooling unit |
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- 2019-12-18 CN CN201911312789.3A patent/CN111121481A/en active Pending
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| CN113863999A (en) * | 2021-09-18 | 2021-12-31 | 西安热工研究院有限公司 | Cold source sharing system and method for dry-wet combined cooling and steam-electricity double-drive induced draft fan of direct air cooling unit |
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