CN212428970U - High-position wet-cooling steam turbine generator unit residual pressure utilization power generation system - Google Patents
High-position wet-cooling steam turbine generator unit residual pressure utilization power generation system Download PDFInfo
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- CN212428970U CN212428970U CN202020998866.7U CN202020998866U CN212428970U CN 212428970 U CN212428970 U CN 212428970U CN 202020998866 U CN202020998866 U CN 202020998866U CN 212428970 U CN212428970 U CN 212428970U
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Abstract
The utility model provides a high-position arranged wet cooling steam turbine generator unit residual pressure utilization power generation system, which comprises a condenser and a circulating water cooling system, wherein the condenser is arranged at a high position and is positioned below the high-position arranged wet cooling steam turbine generator unit; the circulating water cooling system comprises a water source, a pipeline system, a circulating water pump, a residual pressure power generation water turbine and a motor, wherein the water source firstly flows through the circulating water pump through the pipeline system, enters the condenser after being boosted, enters the residual pressure power generation water turbine after heat exchange, and is discharged through the pipeline system; the circulating water pump is also electrically connected with the residual pressure power generation water turbine and the motor; the utility model discloses each storey height of steam turbine factory building sets up more rationally, has solved the big problem of exhaust steam pipe resistance, has reduced the high temperature pipeline quantity, has reduced the heat loss of unit, simultaneously, has also effectively utilized the residual pressure to generate electricity.
Description
Technical Field
The utility model relates to a thermal power technology field especially indicates a wet cold turbo generator set excess pressure of high-order arrangement utilizes power generation system.
Background
At the present stage, the improvement of the unit parameters becomes an important way for the efficiency enhancement and emission reduction of the conventional coal-fired power station, and is also a main direction for the innovation of the coal-fired power generation technology and the upgrading and updating of the industry.
Compared with the conventional arrangement scheme, the high-position arrangement scheme of the steam turbine generator unit has the advantages that the paths of the four pipelines are short, the using amount of the four pipelines can be obviously reduced, meanwhile, the resistance of a main steam system and a reheat steam system can be reduced, the purposes of reducing the coal consumption of the unit and improving the economy of the unit are achieved, and the high-position arrangement technical scheme is adopted by a plurality of power plants.
At present, the steam turbine exhaust in a mature high-position arrangement scheme mostly adopts a direct air cooling mode. And for the wet-cooling steam turbine generator unit adopting high-position arrangement, the elevation of the running layer of the steam turbine generator unit is 50-80 m, and when the condenser is arranged on the 0.00m layer, the steam turbine exhaust pipeline is longer, the resistance of the steam turbine exhaust pipeline is slightly increased compared with the resistance of the steam turbine exhaust pipeline in the scheme of the conventional steam turbine direct-discharge condenser, the steam turbine exhaust resistance is increased, the steam turbine heat consumption is increased, and the running back pressure of the unit is slightly influenced.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem lie in providing a wet cold turbo generator set excess pressure of high-order arrangement promptly and utilize power generation system, and this technical scheme makes the optimization to the shortcoming among the prior art, has solved not enough among the above-mentioned prior art.
The technical means adopted by the utility model are as follows.
A high-position arranged wet cooling steam turbine generator unit residual pressure utilization power generation system comprises a condenser and a circulating water cooling system, wherein the condenser is arranged at a high position and is positioned below the high-position arranged wet cooling steam turbine generator unit; the circulating water cooling system comprises a water source, a pipeline system, a circulating water pump, a residual pressure power generation water turbine and a motor, wherein the water source firstly flows through the circulating water pump through the pipeline system, enters the condenser after being boosted, enters the residual pressure power generation water turbine after heat exchange, and is discharged through the pipeline system; the circulating water pump is also electrically connected with the residual pressure power generation water turbine and the motor.
Furthermore, the wet-cooling steam turbine generator unit is arranged on a steam turbine running layer with the horizontal height of 50-80 m.
Further, the water source is one of seawater and cooling tower water.
The utility model has the advantages that the utility model is listed as follows.
1. The utility model discloses arrange the condenser high level under the steam turbine low pressure jar, turbo generator set exhaust back pressure is not influenced, and turbo generator set high level arranges, has reduced the high temperature pipeline quantity, has not only reduced the construction cost of unit under the expensive condition of high temperature pipeline, has also reduced the heat consumption of unit.
2. The condenser is arranged at the high position, and its recirculated cooling water return water still has higher static pressure, for utilizing this partial excess pressure, the utility model relates to a two circulating water pump cooling systems that drive of water-electricity sets up the hydraulic turbine promptly in circulating water pump one side, and one side sets up the motor, and the motor is as the supplementary power of hydraulic turbine. The design of the part makes full use of the return water residual pressure of the circulating cooling water, and compared with the arrangement scheme of the conventional steam turbine generator set, the electric power consumption of the circulating water pump is increased less.
Drawings
Fig. 1 is the utility model discloses a high-order wet cold turbo generator set excess pressure of arranging utilizes power generation system to arrange the schematic diagram.
Fig. 2 is a schematic flow chart of a seawater direct-flow cooling system according to an embodiment of the present invention.
Fig. 3 is a schematic flow chart of a secondary circulating cooling water system with a cooling tower according to another embodiment of the present invention.
Detailed Description
The utility model belongs to the field of energy-saving equipment for generating electricity by utilizing the excess pressure of circulating cooling water in a high-position arrangement wet-cooling steam turbine generator unit of a coal-fired power plant, in particular to a circulating water cooling system, namely a water and electricity double-drive circulating water pump cooling system, which can effectively reduce the length of a steam turbine exhaust pipeline and the heat consumption of a steam turbine and can reduce the service power consumption; the following description is made with reference to the accompanying drawings and examples.
As shown in figure 1, the utility model discloses a high-order wet cooling turbo generator set excess pressure of arranging utilizes power generation system to arrange the schematic diagram. The utility model discloses in, power generation system contains the vapour source system, wet cold turbo generator set 3, condenser 7, circulating water cooling system (preferably circulating water cooling system is the two circulating water pump cooling systems that drive of water and electricity) and the water source that connect gradually. The key point is that the wet-cooling steam turbine generator unit 3 and the condenser 7 are both arranged in the steam turbine room 2 in a high position; preferably, the condenser 7 is located below the wet cooling steam turbine unit 3, and the elevation of the steam turbine operation layer is about 70m (that is, the wet cooling steam turbine unit is arranged at the steam turbine operation layer with the horizontal height of 70 m). The key point is that the hydropower double-drive circulating water pump cooling system mainly comprises a circulating water pump, a residual pressure power generation water turbine and a motor. Namely, the circulating water pump adopts a water-electricity double-drive mode, circulating water return excess pressure drives the circulating water pump by the excess pressure power generation water turbine to do work, and the part with insufficient power of the circulating water pump is driven by the motor.
Referring to fig. 1 again, specifically, the wet cooling steam turbine generator unit 3 and the condenser 7 are both arranged in the steam turbine room 2 at a high position; and the condenser 7 is located below the wet-cooling turbo generator unit 3. The steam source system can be by the steam of 1 inside production of boiler as the steam source, steam gets into wet cold turbo generator set 3 through steam conduit 8 and generates electricity, and 3 steam turbine steam exhausts of wet cold turbo generator set get into condenser 7.
Further, condenser 7 adopts circulating water cooling, and it is connected with two circulating water pump cooling system and the water source of driving of water and electricity, two circulating water pump cooling system 4 that drive of water and electricity mainly contain circulating water pump, excess pressure electricity generation hydraulic turbine and motor. The water source flows through the circulating water supply pipeline 5 through the circulating water pump, after boosting, the water source enters the condenser 7 which is arranged at a high position, the inside of the condenser 7 and the exhaust heat exchange of the steam turbine firstly enter the residual pressure power generation water turbine, and the residual pressure power generation water turbine is discharged to the circulating water return pipeline 6 after applying work.
It is worth to say that the circulating water pump adopts a water-electricity double-drive mode, namely the circulating water pump is also electrically connected with the excess pressure power generation water turbine and the motor, when the circulating water pump operates, the excess pressure of circulating backwater acts through the excess pressure power generation water turbine to drive the circulating water pump, and the part with insufficient power of the circulating water pump is driven by the motor.
The operation of the present invention will be described in detail below by taking examples as examples.
[ EXAMPLE I ].
As shown in fig. 2, a flow diagram of a seawater dc cooling system according to an embodiment of the present invention is shown. A wet-cooling steam turbine generator unit and a condenser are arranged at a high position in the steam turbine room, and the condenser is arranged below the wet-cooling steam turbine generator unit. Preferably, the wet cooling steam turbine generator unit comprises a generator and a steam turbine low-pressure cylinder which are arranged in parallel and connected with each other, and the condenser is arranged below the steam turbine low-pressure cylinder. And the exhaust steam of the low-pressure cylinder of the steam turbine enters a condenser. The condenser adopts a seawater direct current cooling system. The seawater direct current cooling system mainly comprises a water source, a pipeline system, a circulating water pump, a residual pressure power generation water turbine and a motor. Wherein the pipeline system comprises a circulating water supply pipeline and a circulating water return pipeline, and the water source is preferably seawater.
During operation, seawater flows through the circulating water pump through a circulating water supply pipeline, enters a condenser arranged at a high position after being boosted in the circulating water pump, enters an excess pressure power generation water turbine through a circulating water return pipeline after the heat exchange between the inside of the condenser and the exhaust steam of a steam turbine, is discharged into the circulating water return pipeline after acting, and is finally discharged.
Simultaneously, circulating water pump still electric connection has the excess pressure electricity generation hydraulic turbine and motor, so far circulating water pump, excess pressure electricity generation hydraulic turbine and motor constitute water-electricity and drive circulating water pump altogether, and circulating water pump one side is connected with the excess pressure electricity generation hydraulic turbine promptly, and the opposite side still is connected with the motor, just the motor is as the supplementary power of hydraulic turbine. When in operation, the circulating water backwater excess pressure works through the excess pressure power generation water turbine to drive the circulating water pump, and the part of the circulating water pump with insufficient power is driven by the motor. By adopting the seawater direct-current cooling water system, the residual pressure power generation water turbine can recover more static pressure, and the electric power consumption of the circulating water pump is increased less.
[ example two ].
As shown in fig. 3, the flow of the secondary circulation cooling water system with a cooling tower according to another embodiment of the present invention is schematically shown. A wet-cooling steam turbine generator unit and a condenser are arranged at a high position in the steam turbine room, and the condenser is arranged below the wet-cooling steam turbine generator unit. Preferably, the wet cooling steam turbine generator unit comprises a generator and a steam turbine low-pressure cylinder which are arranged in parallel and connected with each other, and the condenser is arranged below the steam turbine low-pressure cylinder. And the exhaust steam of the low-pressure cylinder of the steam turbine enters a condenser. The condenser adopts a secondary circulating cooling water system with a cooling tower. The secondary circulating cooling water system with the cooling tower mainly comprises a water source, a pipeline system, a circulating water pump, a residual pressure power generation water turbine and a motor. Wherein the pipeline system comprises a circulating water supply pipeline and a circulating water return pipeline, and the water source is preferably cooling tower water.
When the cooling tower operates, the water discharged from the bottom of the cooling tower flows through a circulating water supply pipeline and flows through a circulating water pump, the water enters a condenser arranged at a high position after being boosted in the circulating water pump, the inside of the condenser and the exhaust heat exchange of a steam turbine firstly enter a residual pressure power generation water turbine through a circulating water return pipeline, the water is discharged into the circulating water return pipeline after acting, and finally the cooling tower water is discharged into the cooling tower from the middle of the cooling tower to be recycled.
Simultaneously, circulating water pump still electric connection has the excess pressure electricity generation hydraulic turbine and motor, so far circulating water pump, excess pressure electricity generation hydraulic turbine and motor constitute water-electricity and drive circulating water pump altogether, and circulating water pump one side is connected with the excess pressure electricity generation hydraulic turbine promptly, and the opposite side still is connected with the motor, just the motor is as the supplementary power of hydraulic turbine. When in operation, the circulating water backwater excess pressure works through the excess pressure power generation water turbine to drive the circulating water pump, and the part of the circulating water pump with insufficient power is driven by the motor. By adopting the seawater direct-current cooling water system, the residual pressure power generation water turbine can recover more static pressure, and the electric power consumption of the circulating water pump is increased less.
The utility model discloses a focus lies in that the condenser arranges at the high level, then recirculated cooling water's pressure needs the lifting, and corresponding circulating water pump's design lift increases, and the power consumption when circulating water pump moves increases to some extent. On the other hand, the condenser is arranged at the high position, and its recirculated cooling water return water still has higher static pressure, for utilizing this partial excess pressure, the utility model discloses set up two circulating water pumps that drive of water-electricity, circulating water pump one side sets up the hydraulic turbine, and one side sets up the motor, and the supplementary power of motor as the hydraulic turbine.
The beneficial effects of the utility model are that, make full use of recirculated cooling water's return water residual pressure, circulating water pump's electric power consumption mainly overcomes the system on-the-way loss, and the power consumption that arouses because the difference in height passes through the residual pressure and generates electricity the hydraulic turbine and retrieves. The utility model discloses compare with conventional turbo generator group arrangement scheme, circulating water pump's electric power consumption increases less. Meanwhile, the condenser is arranged at a high position under the low-pressure cylinder of the steam turbine, the exhaust back pressure of the steam turbine generator unit is not affected, and the high-position arrangement of the steam turbine generator unit reduces the using amount of high-temperature pipelines, so that the construction cost of the unit is reduced and the heat consumption of the unit is also reduced under the condition that the high-temperature pipelines are expensive.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings and examples, but the present invention is not limited thereto. In the technical idea scope of the present invention, it is possible to provide a solution of the present invention with a plurality of simple modifications to avoid unnecessary repetition, and the present invention is not described separately for various possible combinations. These simple variations and combinations should also be considered as disclosed in the present invention, all falling within the scope of protection of the present invention.
Claims (3)
1. The excess pressure utilization power generation system of the high-position arranged wet cooling steam turbine generator unit is characterized by comprising a condenser and a circulating water cooling system, wherein the condenser is arranged at a high position and is positioned below the high-position arranged wet cooling steam turbine generator unit;
the circulating water cooling system comprises a water source, a pipeline system, a circulating water pump, a residual pressure power generation water turbine and a motor, wherein the water source firstly flows through the circulating water pump through the pipeline system, enters the condenser after being boosted, enters the residual pressure power generation water turbine after heat exchange, and is discharged through the pipeline system;
the circulating water pump is also electrically connected with the residual pressure power generation water turbine and the motor.
2. The high-position arranged wet and cold steam turbine generator unit residual pressure utilization power generation system is characterized in that the wet and cold steam turbine generator unit is arranged in a steam turbine running layer with the horizontal height of 50-80 m.
3. The system of claim 1, wherein the water source is one of seawater and cooling tower water.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020998866.7U CN212428970U (en) | 2020-06-03 | 2020-06-03 | High-position wet-cooling steam turbine generator unit residual pressure utilization power generation system |
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| CN202020998866.7U CN212428970U (en) | 2020-06-03 | 2020-06-03 | High-position wet-cooling steam turbine generator unit residual pressure utilization power generation system |
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