CN104898630A - Circulating water optimization system and method - Google Patents
Circulating water optimization system and method Download PDFInfo
- Publication number
- CN104898630A CN104898630A CN201510292399.XA CN201510292399A CN104898630A CN 104898630 A CN104898630 A CN 104898630A CN 201510292399 A CN201510292399 A CN 201510292399A CN 104898630 A CN104898630 A CN 104898630A
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- Prior art keywords
- circulating water
- pumps
- power generation
- water pumps
- cooling
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 144
- 238000005457 optimization Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000005057 refrigeration Methods 0.000 claims abstract description 37
- 238000010248 power generation Methods 0.000 claims abstract description 36
- 238000001816 cooling Methods 0.000 claims abstract description 32
- 239000000498 cooling water Substances 0.000 claims abstract description 15
- 238000005265 energy consumption Methods 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/41865—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by job scheduling, process planning, material flow
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
The embodiment of the invention provides a circulating water optimization system and method. Circulating cooling water is provided to both a power generation system and a concentrated refrigeration system at the same time. The circulating water optimization system includes a circulating water front pool, a cooling tower system and multiple circulating water pumps. The circulating water front pool is connected with the cooling tower system. The multiple circulating water pumps are connected with the circulating water front pool. The multiple circulating water pumps pump cooling water from the circulating water front pool, and convey the cooling water to both the power generation system and the concentrated refrigeration system. Backwater of the power generation system and the concentrated refrigeration system enters the cooling tower system and is cooled. The combined running mode of the multiple circulating water pumps is adjusted on the basis of real-time loads of the power generation system and the concentrated refrigeration system. Through adoption of the circulating water optimization system and method, the utilization efficiency of a circulating water cooling system is improved, the running energy consumption of the circulating water pumps is reduced, lands occupies by a cooling tower and the water pumps are saved, and engineering investments are reduced.
Description
Technical Field
The invention relates to the field of combined cooling heating and power supply, in particular to a circulating water system in the field of combined cooling and power supply, and particularly relates to a circulating water optimization system and method for combining a circulating cooling water system of a refrigerating unit and a circulating cooling water system of a power generation system.
Background
The combined cooling heating and power supply of the gas power plant refers to the realization of centralized power supply, heat supply and cold supply by taking natural gas as fuel. In the production process, the power generation system and the centralized refrigeration system both need separate circulating water cooling systems, and 2 circulating water pumps with 100% capacity are respectively configured, so that the power generation system and the centralized refrigeration system are used for one by one, and the occupied area is large.
Although the existing scheme has a certain consideration on safety, the system is complex, the operation mode is single, and particularly when the unit operates at low load, the water pump has low efficiency and high operation energy consumption.
Disclosure of Invention
The invention provides a circulating water optimization system, which aims to solve the problems of large occupied area and high operation energy consumption of the conventional circulating water cooling system of a power plant.
In order to achieve the above object, an embodiment of the present invention provides a circulating water optimization system, which simultaneously provides circulating cooling water for a power generation system and a centralized refrigeration system, and the circulating water optimization system includes a circulating water forebay, a cooling tower system and a plurality of circulating water pumps; the circulating water forebay is connected with the cooling tower system, and the plurality of circulating water pumps are connected with the circulating water forebay; the multiple circulating water pumps extract cooling water from the circulating water forebay and simultaneously convey the cooling water to the power generation system and the centralized refrigeration system for use, and return water of the power generation system and the centralized refrigeration system enters the cooling tower system again for cooling; and adjusting the combined operation mode of the plurality of circulating water pumps according to the real-time loads of the power generation system and the centralized refrigeration system.
Further, in one embodiment, adjusting the combined operation of the plurality of pumps based on the real-time load of the power generation system and the centralized refrigeration system comprises: and selecting a plurality of water pumps to operate in a combined mode, so that the difference between the combined power and the real-time load is minimum.
Further, in an embodiment, the plurality of circulating water pumps are two groups of circulating water pumps, and each group of circulating water pumps comprises at least two pumps with the same capacity; wherein, the capacity of each pump of the first group of circulating water pumps is 50-100% of the total highest load of the power generation system and the centralized refrigeration system; the capacity of each pump of the second group of circulating water pumps is 30-70% of the total highest load of the power generation system and the centralized refrigeration system.
Further, in one embodiment, the plurality of circulating water pumps are different in capacity.
Further, in an embodiment, the plurality of circulating water pumps are variable frequency pumps.
Further, in one embodiment, the cooling tower system includes 4 cooling towers.
In order to achieve the above object, an embodiment of the present invention further provides a method for optimizing circulating water, including: acquiring real-time loads of a power generation system and a centralized refrigeration system; and adjusting the combined operation mode of the plurality of circulating water pumps according to the real-time load.
Further, in one embodiment, adjusting the combined operation of the plurality of pumps based on the real-time load of the power generation system and the centralized refrigeration system comprises: and selecting a plurality of water pumps to operate in a combined mode, so that the difference between the combined power and the real-time load is minimum.
According to the circulating water system and the method provided by the embodiment of the invention, two independent circulating water cooling systems for power generation and refrigeration are combined, so that the optimization of the running mode of the circulating water pump is realized, the utilization efficiency of the system is improved, the energy consumption is saved, the occupied land can be reduced, and the engineering investment is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a circulating water optimization system according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method for optimizing circulating water according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a preferred embodiment of the present invention.
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.
Fig. 1 is a schematic structural diagram of a circulating water optimization system according to an embodiment of the present invention. As shown in fig. 1, the circulating water system of the present invention includes a circulating cooling water supply system for providing circulating cooling water for a power generation system and a centralized refrigeration system at the same time, and the circulating water optimization system includes a circulating water forebay 1, a cooling tower system 2 and a plurality of circulating water pumps 3; the circulating water forebay 1 is connected with the cooling tower system 2, and the plurality of circulating water pumps 3 are connected with the circulating water forebay 1; the plurality of circulating water pumps 3 extract cooling water from the circulating water forebay 1 and simultaneously convey the cooling water to the power generation system and the centralized refrigeration system for use, and return water of the power generation system and the centralized refrigeration system enters the cooling tower system 2 again for cooling; and adjusting the combined operation mode of the plurality of circulating water pumps 3 according to the real-time loads of the power generation system and the centralized refrigeration system.
In this embodiment, the plurality of circulating water pumps are variable frequency pumps.
Fig. 2 is a flowchart of a method of optimizing circulating water according to an embodiment of the present invention. As shown in the figure, the method for optimizing the circulating water comprises the following steps:
step S101, acquiring real-time loads of a power generation system and a centralized refrigeration system;
and S102, adjusting the combined operation mode of the plurality of circulating water pumps according to the real-time load.
In this embodiment, adjusting the combined operation mode of the plurality of pumps according to the real-time load of the power generation system and the centralized refrigeration system includes: and selecting a plurality of water pumps to operate in a combined mode, so that the difference between the combined power and the real-time load is minimum.
The minimum difference is actually the optimal distribution of the power load of the circulating water pump. In the prior art, two 100% capacity water pumps are arranged in a power generation system and a centralized refrigeration system, and the two 100% capacity water pumps are used for standby, so that the capacity of the water pumps is large at the moment, and the full-load operation state of each water pump can be met. However, when the electric load or the cooling load is small, that is, when the load is low, for example, only 30% of the full load is used, only one large-capacity water pump is used, and the large-capacity water pump can only be used for operation, so that the operation efficiency is low, the energy consumption is high, and the resource waste is caused.
After the power generation system and the circulating refrigeration system of the centralized refrigeration system are combined, the number of the water pumps is increased, and the number of the cooling towers is correspondingly increased. The capacities of the plurality of water pumps may be the same or different, or some of them may be the same or some of them may be different. For example, the plurality of circulating water pumps may be divided into two groups, each group of circulating water pumps including at least two pumps having the same capacity; wherein, the capacity of each pump of the first group of circulating water pumps is 50-100% of the total highest load of the power generation system and the centralized refrigeration system; the capacity of each pump of the second group of circulating water pumps is 30-70% of the total highest load of the power generation system and the centralized refrigeration system. However, the present invention is not limited thereto, and the capacity of each water pump may be set according to the minimum and maximum loads of the generator set and the minimum and maximum loads of the refrigerator set. However, the more the number of the circulating water pumps is, the better, the more the circulating water pumps not only increase the difficulty of the project, but also may cause resource waste, so 4-6 are suggested as the best.
FIG. 3 is a schematic structural diagram of a preferred embodiment of the present invention. As shown in the figure, the present embodiment includes 4 circulating water pumps #1, #2, #3, #4, and 4 cooling towers. The water pumps #1 and #2 are a first group of water pumps, the capacity of the first group of water pumps is 90KM, the water pumps #3 and #4 are a second group of water pumps, the capacity of the second group of water pumps is 60KW, when the capacity of the water pumps required by the generator set and the centralized refrigerating unit is 100KW, the second group of water pumps, namely the two 60KW water pumps, are selected to work, and at the moment, the efficiency is highest, and the energy consumption is minimum; when the water pump capacity required by the generator set and the centralized refrigeration unit is 170KW, all the water pumps of one of the first group of water pumps and the second group of water pumps, namely one 90KM water pump and two 60KM water pumps are selected to work, and at the moment, the efficiency is highest and the energy consumption is minimum; when the capacity of the water pumps required by the generator set and the centralized refrigerating unit is 250KW, one of the first group of all water pumps and the second group of all water pumps, namely two 90KM water pumps and one 60KW water pump, is selected to work, and at the moment, the efficiency is highest and the energy consumption is minimum. The optimized distribution scheme of the water pump in the embodiment can be obtained from the following table 1.
TABLE 1
In other embodiments, the water pump capacity may vary. For example, the capacity of the water pump #1 is 100KM, the capacity of the water pump #2 is 80KM, the capacity of the water pump #3 is 30KM, and the capacity of the water pump #4 is 60KM, and at this time, if the required capacities of the water pumps are 100KW, 170KW, and 250KW, respectively, the optimal allocation scheme is as shown in table 2.
TABLE 2
| Water pump coding | 100KW | 170KW | 250KW |
| #1(100KW) | √ | √ | √ |
| #2(80KW) | √ | √ | |
| #3(30KW) | √ | ||
| #4(60KW) | √ |
According to the embodiment, the circulating water optimization system and the circulating water optimization method improve the utilization efficiency of the circulating water cooling system, reduce the operation energy consumption of the circulating water pump, save the occupied area of the cooling tower and the water pump, and reduce the engineering investment.
The principle and the implementation mode of the invention are explained by applying specific embodiments in the invention, and the description of the embodiments is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (8)
1. A circulating water optimization system is characterized in that circulating cooling water is provided for a power generation system and a centralized refrigeration system at the same time, and comprises a circulating water forebay, a cooling tower system and a plurality of circulating water pumps;
the circulating water forebay is connected with the cooling tower system, and the plurality of circulating water pumps are connected with the circulating water forebay;
the multiple circulating water pumps extract cooling water from the circulating water forebay and simultaneously convey the cooling water to the power generation system and the centralized refrigeration system for use, and return water of the power generation system and the centralized refrigeration system enters the cooling tower system again for cooling;
and adjusting the combined operation mode of the plurality of circulating water pumps according to the real-time loads of the power generation system and the centralized refrigeration system.
2. The circulating water optimization system of claim 1, wherein adjusting the combined operation of the plurality of pumps based on the real-time load of the power generation system and the centralized refrigeration system comprises:
and selecting a plurality of water pumps to operate in a combined mode, so that the difference between the combined power and the real-time load is minimum.
3. The circulating water optimization system of claim 1, wherein the plurality of circulating water pumps are two groups of circulating water pumps, each group of circulating water pumps comprises at least two pumps with the same capacity; wherein,
the capacity of each pump of the first group of circulating water pumps is 50% -100% of the total highest load of the power generation system and the centralized refrigeration system;
the capacity of each pump of the second group of circulating water pumps is 30-70% of the total highest load of the power generation system and the centralized refrigeration system.
4. The circulating water optimization system of claim 1, wherein the plurality of circulating water pumps vary in capacity.
5. The circulating water optimization system according to any one of claims 1 to 4, wherein the plurality of circulating water pumps are variable frequency pumps.
6. A circulating water optimization system as claimed in any one of claims 1 to 4, wherein the cooling tower system comprises 4 cooling towers.
7. A method for optimizing circulating water, the method comprising:
acquiring real-time loads of a power generation system and a centralized refrigeration system;
and adjusting the combined operation mode of the plurality of circulating water pumps according to the real-time load.
8. The method of optimizing circulating water of claim 7 wherein adjusting the combined operation of the plurality of pumps based on the real-time load of the power generation system and the centralized refrigeration system comprises:
and selecting a plurality of water pumps to operate in a combined mode, so that the difference between the combined power and the real-time load is minimum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510292399.XA CN104898630A (en) | 2015-06-01 | 2015-06-01 | Circulating water optimization system and method |
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| CN201510292399.XA CN104898630A (en) | 2015-06-01 | 2015-06-01 | Circulating water optimization system and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108775823A (en) * | 2018-04-25 | 2018-11-09 | 国网上海市电力公司 | A kind of cooling tower for combined supply system |
| CN111270744A (en) * | 2020-03-09 | 2020-06-12 | 大唐贵州发耳发电有限公司 | Sewage discharge system for recycling working medium |
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| CN204719518U (en) * | 2015-06-01 | 2015-10-21 | 北京京能未来燃气热电有限公司 | A kind of recirculated water optimization system |
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| WO2007095685A1 (en) * | 2006-02-23 | 2007-08-30 | David Man Chu Lau | An industrial process efficiency method and system |
| CN102298371A (en) * | 2011-06-28 | 2011-12-28 | 广东省电力设计研究院 | Distributed combined cooling and power supply system and control method thereof |
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Application publication date: 20150909 |