CN201803602U - Solar energy-saving and controlling device for circulating cooling water in thermal power plant - Google Patents
Solar energy-saving and controlling device for circulating cooling water in thermal power plant Download PDFInfo
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- CN201803602U CN201803602U CN2010202146128U CN201020214612U CN201803602U CN 201803602 U CN201803602 U CN 201803602U CN 2010202146128 U CN2010202146128 U CN 2010202146128U CN 201020214612 U CN201020214612 U CN 201020214612U CN 201803602 U CN201803602 U CN 201803602U
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Abstract
The utility model discloses a solar energy-saving and controlling device for circulating cooling water in a thermal power plant. The device adopts the structure that a water service pump set 7 and an energy-saving control device 9 of the water service pump set 7 are additionally arranged on the basis of the traditional circulating cooling water system, wherein the water service pump set 7 is connected in series or in parallel with a circulating water pump 3 and is charged by a solar energy generation set 8. By utilizing the properties of solar energy in days and at nights and in different seasons, the temperature of the circulating cooling water is adjusted, and the auxiliary power ratio of the circulating water pump of a generation set is reduced. Therefore, obvious energy saving effect is achieved.
Description
Technical field
The utility model relates to a kind of energy-saving solar and control device, particularly a kind of energy-conservation and control device that utilizes solar energy to reduce thermal power plant's recirculating cooling water system station service power consumption rate and realize circulating water temperature optimization.
Background technology
In the primary energy structure of China, fossil fuel proportions such as coal reach more than 70%.Therefore, the thermal power plant ratio in the capacity of installed generator at home also surpasses 60%, and according to statistics, there is electric power more than 40% in the whole world from fossil fuels such as coals.Although the ratio of various regenerative resources such as wind energy, solar energy is progressively improving at present, in one quite long from now on period, the thermal power plant will be an important component part of global power industry.
The pay attention to day by day of the greenhouse effects problem that the carbon dioxide that the thermal power plant that uses fossil fuel is discharged along with the national governments and the public causes, improving the efficient of generating set and reducing pollutant emission just becomes a vital problem of thermal power plant survival and development from now on.
The thermal power generation unit is a whole set of the complicated technical process that the chemical energy of coal etc. is converted to electric energy through heat energy and mechanical energy.The efficient of its thermal power transfer and transmittance process only about 40% has 60% energy to become low temperature exhaust heat approximately and has been lost in the air.And the efficiency of cycle of thermal power generation unit depends primarily on the temperature difference by steam turbine.This both just meaned and can also can improve the temperature difference by the cooling water temperature that reduces steam turbine condenser, thereby obtain higher cycle efficieny by adopting higher steam parameter.
At present the recirculated cooling water operating mode of thermal power plant conventional design generally is that the average coolant water temperature according to unit whole year is that benchmark is considered, and annually has the coolant water temperature of 50% time to surpass mean value approximately.Although can be improved (Feng Weizhong by further optimization, " power engineering " the 27th the 3rd phase of volume, " optimization and the discussion of 1000MW supercritical turbine steam parameter "), but the cycle efficieny of unit still can be in the considerable time because of the variation of factors such as environment temperature high efficiency operating mode during off-design.
Being used to the thermal power plant circulation of unit recirculated cooling water is provided is a huge induction system, output is about 50～120 times of turbine discharge amount, the electric energy of its consumption accounts for 1%～1.5% of gross generation, exerts oneself, formed between the circulation wasted work restricting relation of a complexity in Turbo-generator Set.And reasonably circulating water temperature is also closely related with the running status of condenser and vacuum system.Many outside uncontrollable factors with regard to make the optimization of circulation become in thermal power plant's whole efficiency optimization one very crucial and fail the problem that better solves.General with good grounds environment temperature of the solution of taking at present and unit load change the water circulating pump platform number of operation or set up the water circulating pump converter plant and realize the energy-conservation of circulation, but but the regulating measure of these modes and precision are all limited, and operational effect is also desirable not to the utmost.
And in the extensive utilization of regenerative resources such as present solar energy and wind energy, one of maximum problem is exactly its uncertainty with environment, weather and time, the unstable generated energy that these regenerative resources directly insert electrical network to be brought can cause tremendous influence to the operation and the safety of whole electrical network, must adapt to the direct networking and the scheduling problem of these generation of electricity by new energy units by costly intelligent grid transformation and upgrading.And will be energy-conservation as the conventional thermal power plant of the introducing circulation system realizations such as solar energy of regenerative resource, not only provide a new road for the thermal power plant energy-saving and emission-reduction, also can realize the scale utilization of solar energy the most convenient and effectively.
Summary of the invention
The utility model discloses a kind of energy-saving solar and control device of firepower electrical plant recirculating cooling water system, by rationally utilize device of solar generating exert oneself with circulation power consumption round the clock with mate characteristics season, thereby overcome above-mentioned the deficiencies in the prior art, obtain tangible synthesis energy saving effect.
The technical solution of the utility model specifically is with the water circulating pump combined running of regular circulation cooling water system by one, utilize solar powered recirculated cooling water distribution pump group and energy-saving control device thereof to realize, promptly by turbine condenser 4, water circulating pump 3 and cooling tower 1, in the conventional thermal power generation unit recirculating cooling water system that pond of cooling tower 2 grades are formed, increase a distribution pump group 7 and a backwater non-return flap 10 by device of solar generating 8 power supplies, this distribution pump group 7 is installed in the cooling tower water distribution pipeline 6, and is controlled by energy-saving control device 9 interlocks with recirculated water backwater bypass valve 5.
According to the design feature of different unit circulations, can adopt the serial or parallel connection arrangement form with water circulating pump 3 by solar powered distribution pump group 7, and can be designed as many distribution pump combined runnings.
The ward and the building surface that adopt the device of solar generating 8 of existing solar photovoltaic technology can fully be beneficial to power plant are arranged, the electric energy of its generation provides electric energy by power supply buses and batteries for distribution pump 7, the variable frequency adjustment devices are adopted in distribution pump group 7 designs simultaneously, can be according to the size of exerting oneself of the variation control distribution pump group 7 of operational factors such as the power supply state of solar energy equipment 8 and environment temperature.
There is signaling interface to get in touch between energy-saving control device 9 and the monoblock scattered control system DCS, thereby can obtains real time datas such as unit load, condenser vacuum, condensing water temperature, recirculated water return water temperature, recirculated water inflow temperature, atmospheric temperature by DCS; Simultaneously, but energy-saving control device 9 is the supply voltage, the signals such as rotating speed of distribution pump group 7 of collection in worksite device of solar generating 8 also, after above-mentioned signal is handled via energy-saving control device 9, the start and stop of output distribution pump group 7 and the control instruction of rotating speed control instruction and recirculated water backwater bypass valve 5 apertures, and the operation platform number of unit water circulating pump 3 can be set by DCS, according to the principle of preferentially utilizing solar energy, obtain maximum energy-saving effect.
The beneficial effects of the utility model are compared with prior art, adopted the regulating measure of solar powered distribution pump group as the recirculated water energy saving optimizing, be used in combination with the regular circulation water pump, recirculating cooling water system demand and device of solar generating exert oneself season of the two and synchronous characteristic have round the clock been made full use of, maximally utilise solar energy and finish the adjusting of cooling tower water distribution and circulating water temperature, thereby reduced the station service power consumption rate of circulation effectively, also improved the Energy Saving Control precision of steam turbine recirculating cooling water system.For the cycle efficieny that improves traditional thermal power plant and effective application of solar energy provide a new solution.
Description of drawings
Fig. 1 is that the utility model adopts the structure chart when being arranged in parallel scheme;
Structure chart when Fig. 2 is the utility model employing arranged in series scheme.
The specific embodiment
According to Fig. 1, Fig. 2 embodiment of the present utility model is elaborated below, embodiment is being to implement under the prerequisite and provided concrete embodiment with technical solutions of the utility model, but protection domain of the present utility model is not limited to following embodiment.
Embodiment 1: solar powered distribution pump and water circulating pump are arranged in parallel:
As shown in Figure 1, thermal power generation unit recirculating cooling water system is made up of turbine condenser 4, water circulating pump 3 and cooling tower 1, pond of cooling tower 2 etc., embodiment one of the present utility model is characterised in that and is provided with between pond of cooling tower and sparge pipe by solar powered distribution pump group 7 and backwater non-return flap 10, and by the start and stop and the running speed of energy-saving control device 9 control distribution pump groups 7, by the distributed water flow of change cooling tower, thereby reach the purpose of regulating the recirculated water inflow temperature.
Because the electric energy that solar energy equipment 8 is provided when the high and nocturnal temperature of temperature hangs down by day and the demand of the unit recirculated cooling water temperature difference are just in time mated, therefore, the diffusing control system DCS communication of energy-saving control device 9 slave components obtains unit load, condenser vacuum and recirculated water advance, parameters such as return water temperature difference also compare with setting value, according to the platform number and the rotating speed of difference size adjustment distribution pump of the two, when temperature is higher by day, improve the distribution pump rotating speed, when nighttime temperature is low, reduce the distribution pump rotating speed or reduce the water circulating pump platform number that moves, satisfy the operation needs of unit under the varying environment temperature.
Under different unit loads, energy-saving control device 9 can be according to the running status of distribution pump, according to the mode that presets, exerting oneself of preferential adjusting distribution pump group 7, maximally utilise solar energy, and further set the operation platform number of water circulating pump 3 on this basis, thereby it is poor to make that unit can both reach the design end as much as possible under different load and environment (season) operating mode, the station service power consumption rate of reduction water circulating pump.
When lower or winter temperature is low at unit load, can also be by regulating the aperture of recirculated water bypass valve 5, make the backwater of condenser directly be back to pond of cooling tower, and bear the water distribution and the insulation of cooling tower, thereby further reduce the station service power consumption rate of water circulating pump by distribution pump group 7.
Embodiment 2: solar powered distribution pump and water circulating pump arranged in series:
According to shown in Figure 2, thermal power generation unit recirculating cooling water system also is made up of turbine condenser 4, water circulating pump 3 and cooling tower 1, pond of cooling tower 2 etc., embodiment two of the present utility model is characterised in that to connect between recirculated water water return pipeline and sparge pipe and is provided with by solar powered distribution pump group 7 as the water circulating pump booster, and by the start and stop and the running speed of energy-saving control device 9 control distribution pump groups 7, thereby reach the purpose that reduces the water circulating pump station service power consumption rate and regulate the recirculated cooling water temperature.
Because solar energy equipment 8 is when the high and nocturnal temperature of temperature hangs down by day, the demand of electric energy that provides and the cooling of unit recirculated water is just in time mated, therefore, energy-saving control device 9 slave components loose parameter such as unit load, condenser vacuum and the recirculated water that control system DCS communication obtains advances, return water temperature difference and with setting value relatively, by regulating distribution pump operation platform number and rotating speed, satisfy the operation needs of unit under the varying environment temperature according to its difference size.
Under different unit loads, energy-saving control device can be according to the running status of distribution pump, according to the mode that presets, exerting oneself of preferential adjusting distribution pump, maximally utilise solar energy, and further set the operation platform number of water circulating pump on this basis, thus it is poor to make that unit can reach the design end as much as possible under different load and environmental working condition, and greatly reduce the station service power consumption rate of water circulating pump.
Claims (2)
1. thermal power plant's circulating cooling water solar energy saving and control device, it comprises cooling tower (1), pond of cooling tower (2), water circulating pump (3), turbine condenser (4), recirculated water backwater bypass valve (5), cooling tower water distribution pipeline (6), distribution pump group (7), device of solar generating (8), energy-saving control device (9) and backwater non-return flap (10), it is characterized in that: on cooling tower water distribution pipeline (6), be provided with distribution pump group (7), and control by energy-saving control device (9) with recirculated water backwater bypass valve (5) by device of solar generating (8) power supply.
2. a kind of thermal power plant circulating cooling water solar energy saving as claimed in claim 1 and control device is characterized in that: the distribution pump group (7) by device of solar generating (8) power supply can be designed as and water circulating pump (3) serial or parallel connection arrangement form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202146128U CN201803602U (en) | 2010-06-02 | 2010-06-02 | Solar energy-saving and controlling device for circulating cooling water in thermal power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202146128U CN201803602U (en) | 2010-06-02 | 2010-06-02 | Solar energy-saving and controlling device for circulating cooling water in thermal power plant |
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| Publication Number | Publication Date |
|---|---|
| CN201803602U true CN201803602U (en) | 2011-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202146128U Expired - Fee Related CN201803602U (en) | 2010-06-02 | 2010-06-02 | Solar energy-saving and controlling device for circulating cooling water in thermal power plant |
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| CN (1) | CN201803602U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102401608A (en) * | 2011-11-30 | 2012-04-04 | 南京大洋冷却塔股份有限公司 | Energy management and intelligent control-based solar cooling tower |
-
2010
- 2010-06-02 CN CN2010202146128U patent/CN201803602U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102401608A (en) * | 2011-11-30 | 2012-04-04 | 南京大洋冷却塔股份有限公司 | Energy management and intelligent control-based solar cooling tower |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110420 Termination date: 20130602 |