CN112229137A - Unit set circulating water energy-saving system, control method and control device - Google Patents

Unit set circulating water energy-saving system, control method and control device Download PDF

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Publication number
CN112229137A
CN112229137A CN202011293054.3A CN202011293054A CN112229137A CN 112229137 A CN112229137 A CN 112229137A CN 202011293054 A CN202011293054 A CN 202011293054A CN 112229137 A CN112229137 A CN 112229137A
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CN
China
Prior art keywords
circulating water
water
unit set
circulating
cooling tower
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CN202011293054.3A
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Chinese (zh)
Inventor
张同喜
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Zhejiang Zheneng Lanxi Power Generation Co Ltd
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Zhejiang Zheneng Lanxi Power Generation Co Ltd
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Priority to CN202011293054.3A priority Critical patent/CN112229137A/en
Publication of CN112229137A publication Critical patent/CN112229137A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/02—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating liquids, e.g. brine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D16/00—Devices using a combination of a cooling mode associated with refrigerating machinery with a cooling mode not associated with refrigerating machinery
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F25D29/001—Arrangement or mounting of control or safety devices for cryogenic fluid systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28B—STEAM OR VAPOUR CONDENSERS
    • F28B9/00—Auxiliary systems, arrangements, or devices
    • F28B9/04—Auxiliary systems, arrangements, or devices for feeding, collecting, and storing cooling water or other cooling liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
    • F28C1/00—Direct-contact trickle coolers, e.g. cooling towers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
    • F28F27/003—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus specially adapted for cooling towers

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention provides a unit set circulating water energy-saving system, a unit set circulating water energy-saving control method and a unit set circulating water energy-saving control device, and belongs to the technical field of power plant energy conservation. The system comprises: at least one unit water circulating system, each unit water circulating system comprising: the system comprises two sets of cooling towers, a front pool of a pump room, a trash remover, a circulating water pump and a condenser which have the same structure and function and are sequentially connected through pipelines, wherein a water outlet of the circulating water pump is communicated with a water inlet end of the condenser through a water inlet pipeline, and a water outlet end of the condenser is communicated with a water inlet end of the cooling tower through a first water return pipeline; a first circulating water communication branch is arranged between the water return pipelines; and a circulating water communication branch is arranged between the water inlet pipelines. The invention has the advantages of increasing the utilization rate of the cooling tower, improving the cooling effect and the cooling efficiency, saving energy and reducing energy consumption.

Description

Unit set circulating water energy-saving system, control method and control device
Technical Field
The invention relates to the technical field of energy conservation of power plants, in particular to a circulating water energy-saving system of a unit set, a circulating water energy-saving control method of the unit set and a circulating water energy-saving control device of the unit set.
Background
The circulating water system is one of important equipment of a power plant, is also called as a closed circulating unit system water supply system, the same unit set generally shares one set of circulating water system, and each condenser unit in the same unit set is respectively provided with a cooling tower, a sewage cleaning machine and a circulating water pump. In the running process of the unit, after condensed water from the cooling tower passes through the dirt removing machine and the circulating water pump, the condensed water is continuously conveyed to the high-pressure condenser and the low-pressure condenser to cool the low-pressure steam exhaust of the steam turbine so as to maintain the vacuum of the condenser, the steam-water circulation is maintained, and after the condensed water passes through the high-pressure condenser and the low-pressure condenser, the condensed water is conveyed into the cooling tower through the water return pipeline to be cooled and then is continuously utilized.
Disclosure of Invention
The embodiment of the invention aims to provide a circulating water energy-saving system of a unit set and a control method, so as to at least solve the problems of vacant cooling tower, low utilization rate of the cooling tower and energy waste.
In order to achieve the above object, a first aspect of the present invention provides a water circulating energy saving system for a unit set, the system comprising:
at least one unit water circulating system, the unit water circulating system includes:
the system comprises a first cooling tower, a first front pool of a pump room, a first trash remover, a first circulating water pump and a first condenser which are sequentially connected through pipelines; a water outlet of the first circulating water pump is communicated with a water inlet end of the first condenser through a first water inlet pipeline; the water outlet end of the first condenser is communicated with the water inlet end of the first cooling tower through a first water return pipeline;
the second cooling tower, the second front pool of the pump room, the second trash remover, the second circulating water pump and the second condenser are sequentially connected through pipelines; a water outlet of the second circulating water pump is communicated with a water inlet end of the second condenser through a second water inlet pipeline; the water outlet end of the second condenser is communicated with the water inlet end of the second cooling tower through a second water return pipeline;
a first circulating water communication branch is arranged between the first water return pipeline and the second water return pipeline;
and a second circulating water communication branch is arranged between the first water inlet pipeline and the second water inlet pipeline.
Optionally, the first water inlet pipeline and the first water return pipeline are provided with first valves, and the two first valves are respectively close to the water inlet end and the water outlet end of the first condenser.
Optionally, a second valve is arranged on each of the second water inlet pipeline and the second water return pipeline, and the two second valves are respectively close to the water inlet end and the water outlet end of the second condenser.
Optionally, the first circulating water communication branch and the second circulating water communication branch are both provided with a third valve and a flowmeter.
Optionally, two third valves are respectively arranged on the first circulating water communication branch and the second circulating water communication branch.
Optionally, a liquid level meter is arranged in each of the first cooling tower and the second cooling tower.
The second aspect of the present invention provides a method for controlling energy saving of circulating water of a unit set, which is applied to the above-mentioned system for controlling energy saving of circulating water of a unit set, and the method includes:
acquiring the running state of each unit in the unit units;
if the unit set is stopped, acquiring the operation load of the unit set which is not stopped;
and if the unit set which is not stopped is not in full-load operation, the first circulating water communication branch and the second circulating water communication branch are conducted in sequence.
Optionally, the method further includes:
determining that the first circulating water communication branch and the second circulating water communication branch are communicated to obtain the current liquid levels of the first cooling tower and the second cooling tower;
calculating the liquid level difference of the first cooling tower and the second cooling tower in real time based on the current liquid levels of the first cooling tower and the second cooling tower, and judging whether the liquid level difference is greater than a preset standard deviation;
if the time period T elapses1And then, adjusting the conducting quantity of the first circulating water communication branch and/or the second circulating water communication branch until the liquid level difference is smaller than the preset standard deviation.
Optionally, the method further includes:
determining the conduction of the first circulating water communication branch and the second circulating water communication branch, and acquiring the current value change rate of the first circulating water pump, the current value change rate of the second circulating water pump, the pressure value change rate of the water outlet of the first circulating water pump and the pressure value change rate of the water outlet of the second circulating water pump;
and if the current value change rate of the first circulating water pump is greater than a preset first current change rate threshold value and/or the current value change rate of the second circulating water pump is greater than a preset second current change rate threshold value and/or the pressure value change rate of the water outlet of the first circulating water pump is greater than a preset first pressure change rate threshold value and/or the pressure value change rate of the water outlet of the second circulating water pump is greater than a preset second pressure change rate threshold value, disconnecting the first circulating water communication branch and the second circulating water communication branch.
The third aspect of the present invention provides a unit set circulating water energy-saving control device, which is applied to the unit set circulating water energy-saving system, and the device includes:
the acquisition module is used for acquiring the running state and the running load of each unit in the unit units;
the judging module is used for judging whether the unit set stops running or not according to the running state, judging whether the unit set which is not stopped runs at full load or not under the condition that the unit set stops running, and outputting a conducting instruction under the condition that the unit set which is not stopped does not run at full load;
and the execution module is used for sequentially switching on the first circulating water communication branch and the second circulating water communication branch according to the switching-on instruction.
According to the invention, through the arrangement of the first circulating water communication branch, the return water of the condenser can be conveyed to the vacant cooling tower, and is conveyed to the condenser for utilization after being cooled by the cooling tower through the second circulating water communication branch, so that the utilization rate of the cooling tower can be increased, the cooling effect and the cooling efficiency can be improved, the energy can be saved, and the energy consumption can be reduced; the invention also sets a standard height difference for reflecting the liquid levels of the first cooling tower and the second cooling tower and judges whether the system normally works according to the current value change rate of the circulating water pump and/or the water outlet pressure value change rate of the circulating water pump, thereby having better protection effect on the device and improving the safety performance.
Additional features and advantages of embodiments of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention without limiting the embodiments of the invention. In the drawings:
FIG. 1 is a schematic structural diagram of a circulating water energy-saving system of a unit set provided by the invention;
FIG. 2 is a flow chart of a circulating water energy-saving control method for a unit set provided by the invention;
fig. 3 is a schematic structural diagram of a circulating water energy-saving control device for a unit set provided by the invention.
Description of the reference numerals
10-a first cooling tower; 11-a first circulating pump house forebay; 12-a first trash remover;
13-a first circulating water pump; 14-a first condenser; 15-a first water inlet conduit;
16-a first return pipe; 20-a second cooling tower; 21-a second circulating pump house forebay;
22-a second trash remover; 23-a second circulating water pump; 24-a second condenser;
25-a second water inlet pipe; 26-a second water return pipeline; 3-a first circulating water communication branch;
4-a second circulating water communication branch; 5-a first valve; 6-a second valve;
7-a third valve; 8-flow meter.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
FIG. 1 is a schematic structural diagram of a circulating water energy-saving system of a unit set provided by the invention. As shown in fig. 1, an embodiment of the present invention provides a water circulating energy saving system for a unit set, where the system includes: at least one unit water circulating system, the unit water circulating system includes:
the system comprises a first cooling tower 10, a first front pool 11 of a pump room, a first trash remover 12, a first circulating water pump 13 and a first condenser 14 which are connected in sequence through pipelines; a water outlet of the first circulating water pump 13 is communicated with a water inlet end of the first condenser 14 through a first water inlet pipeline 15; the water outlet end of the first condenser 14 is communicated with the water inlet end of the first cooling tower 10 through a first return water pipeline 16;
the second cooling tower 20, the second front pool 21 of the pump room, the second trash remover 22, the second circulating water pump 23 and the second condenser 24 are connected in sequence through pipelines; a water outlet of the second circulating water pump 23 is communicated with a water inlet end of the second condenser 24 through a second water inlet pipeline 25; the water outlet end of the second condenser 24 is communicated with the water inlet end of the second cooling tower 20 through a second water return pipeline 26;
a first circulating water communication branch 3 is arranged between the first water return pipeline 16 and the second water return pipeline 26;
a second circulating water communication branch 4 is arranged between the first water inlet pipeline 15 and the second water inlet pipeline 25.
In the technical scheme, only one unit set circulating water system is listed for explanation, the other unit set circulating water systems in the plurality of unit set circulating water systems are all arranged in parallel, and all the unit set circulating water systems are connected to a water supply water pipe and a chemical clarification tank water supply pipeline.
The condensate water of the first condenser enters the first cooling tower through the first water return pipeline, is cooled by the first cooling tower and reaches the first condenser through the circulating pump room forebay, the first trash remover and the first circulating water pump through the first water inlet pipeline, and the second condenser works in the same mode. Use first condenser work, the second condenser stops the operation as an example, when the unit is shut down at the second condenser place unit in the unit circulating water system, the first cooling tower that the second condenser corresponds can be in idle state, at this moment, in order to reduce the load of the first cooling tower that does not shut down the unit and correspond, can switch on the first circulating water contact branch road and the second circulating water contact branch road of connecting two units, make the return water that first condenser work produced shunt the second cooling tower that the unit corresponds in through first circulating water contact branch road, the refrigerated condensate water enters into first inlet channel through second circulating water contact branch road, utilize by first condenser, through this kind of mode, can increase the utilization ratio of cooling tower, improve cooling effect and cooling efficiency, and the energy saving, reduce the energy consumption comdenstion water. The trash remover can be a rotary brush mesh grate type trash remover.
Further, the first water inlet pipeline 15 and the first water return pipeline 16 are provided with first valves 5, and the two first valves 5 are respectively close to the water inlet end and the water outlet end of the first condenser 14.
All be provided with two first valves 5 on first inlet channel and first return water pipeline, first valve 5 works as including the inlet valve of setting on first inlet channel and the outlet valve of setting on first return water pipeline first condenser stop work is used for keeping apart first condenser cuts off the condensate water of first condenser.
Further, the second water inlet pipeline 25 and the second water return pipeline 26 are provided with second valves 6, and the two second valves 6 are respectively close to the water inlet end and the water outlet end of the second condenser 24.
All be provided with two second valves 6 on second inlet channel and second return water pipeline, second valve 6 works as the second condenser stop work including setting up the inlet valve on the second inlet channel and setting up the outlet valve on the second return water pipeline, inlet valve and outlet valve are used for keeping apart the second condenser cuts off the condensate water of second condenser.
Further, a third valve 7 and a flow meter 8 are arranged on the first circulating water connecting branch 3 and the second circulating water connecting branch 4.
The third valve 7 is used for conducting and closing the first circulating water communication branch and the second circulating water communication branch according to actual use requirements, and the third valve can be set as an electric valve and can be remotely operated through remote control or connected to a corresponding controller and can be automatically controlled through control signals; the flowmeter 8 that sets up can reflect whether inside rivers exist in the pipeline of first circulating water liaison branch road and second circulating water liaison branch road, and whether the supplementary judgement as the third valve switches on.
Furthermore, two third valves 7 are respectively arranged on the first circulating water connecting branch 3 and the second circulating water connecting branch 4.
The number of the third valves 7 on the first circulating water communication branch and the second circulating water communication branch is set to be two, so that the tightness of the first circulating water communication branch and the second circulating water communication branch can be ensured, the condition that when a circulating water system of a unit set normally works, the pressure of the first cooling tower and the pressure of the second cooling tower are changed due to poor sealing, and the conveying of condensed water is influenced is avoided, wherein one of the three valves 7 can be set to be a one-way valve, and the condition that the backflow water is generated in the using process is avoided.
Further, a liquid level meter (not shown) is provided in each of the first cooling tower 10 and the second cooling tower 20.
The level gauge that sets up can reflect the liquid level height in first cooling tower and the second cooling tower, and whether the intaking and the play water of following supplementary judgement first cooling tower and second cooling tower are normal, avoids cooling tower business turn over water to lead to the damage of equipment unusually.
FIG. 2 is a flow chart of the energy-saving control method for circulating water of the unit set provided by the invention. As shown in fig. 2, an embodiment of the present invention further provides a method for controlling energy saving of circulating water of a unit set, which is applied to the above-mentioned system for saving energy of circulating water of a unit set, and the method includes:
step 101, acquiring the running state of each unit in the unit units;
102, if the unit set in the unit set stops running, acquiring the running load of the unit set which is not stopped running;
and 103, if the unit set which is not shut down is not in full-load operation, sequentially conducting the first circulating water communication branch and the second circulating water communication branch.
In the embodiment, only two sets of units with the same configuration are arranged in a unit circulating water system as an example, and the method is also applicable to the condition that the number of the units in the unit circulating water system is more than two sets, when one unit is stopped, the condenser corresponding to the unit is stopped, the cooling tower corresponding to the condenser is in an idle state, at the moment, in order to reduce the load of the cooling tower corresponding to the unit which is not stopped, a first circulating water connecting branch and a second circulating water connecting branch which are connected with the two units can be conducted, so that the return water generated by the unit which is not stopped is shunted to the cooling tower corresponding to the unit which is stopped through the first circulating water connecting branch, and the cooled condensed water is reused through the second circulating water connecting branch, and by the way, the utilization rate of the cooling tower can be increased, and the cooling effect and the cooling efficiency can be improved, energy is saved and energy consumption is reduced.
After a certain unit in the unit is shut down, firstly, the operating load of the unit which is not shut down is obtained, if the unit which is shut down is in full-load operation, the first circulating water communication branch and the second circulating water communication branch are not conducted, specifically, the first circulating water communication branch and the second circulating water communication branch are conducted, so that the cooling efficiency of condensed water is increased, the vacuum pressure of a condenser of the unit which is not shut down is increased, and the load of the unit is increased.
Specifically, after a certain unit in the unit units stops running, the water discharging state of the hot furnace of the unit in running and the heat source isolation state are obtained, the water discharging of the hot furnace of the unit in running is finished, the heat source is isolated, and the water inlet valve and the water outlet valve of the unit in running are closed.
Further, the method further comprises:
determining that the first circulating water communication branch and the second circulating water communication branch are communicated to obtain the current liquid levels of the first cooling tower and the second cooling tower;
calculating the liquid level difference of the first cooling tower and the second cooling tower in real time based on the current liquid levels of the first cooling tower and the second cooling tower, and judging whether the liquid level difference is greater than a preset standard deviation;
if the time period T elapses1And then, adjusting the conducting quantity of the first circulating water communication branch and/or the second circulating water communication branch until the liquid level difference is smaller than the preset standard deviation.
When the guide flux of the first circulating water communication branch and the second circulating water communication branch is adjusted, the guide flux of the first circulating water communication branch and the guide flux of the second circulating water communication branch are changed by controlling the opening degree of a valve arranged on the first circulating water communication branch and/or the second circulating water communication branch; in the adjusting process, if the liquid level of the second cooling tower is higher than that of the first cooling tower, the opening degree of the valve on the first circulating water connecting branch line can be reduced firstly, the opening degree of the valve on the second circulating water connecting branch line is not changed, and after a certain time, the liquid level difference between the first cooling tower and the second cooling tower is observed to be adjusted until the liquid level difference between the first cooling tower and the second cooling tower is smaller than the preset standard height difference.
Further, the method further comprises:
determining the conduction of the first circulating water communication branch and the second circulating water communication branch, and acquiring the current value change rate of the first circulating water pump, the current value change rate of the second circulating water pump, the pressure value change rate of the water outlet of the first circulating water pump and the pressure value change rate of the water outlet of the second circulating water pump;
and if the current value change rate of the first circulating water pump is greater than a preset first current change rate threshold value and/or the current value change rate of the second circulating water pump is greater than a preset second current change rate threshold value and/or the pressure value change rate of the water outlet of the first circulating water pump is greater than a preset first pressure change rate threshold value and/or the pressure value change rate of the water outlet of the second circulating water pump is greater than a preset second pressure change rate threshold value, disconnecting the first circulating water communication branch and the second circulating water communication branch.
When two units in the unit units normally operate, current values of a first circulating water pump and a second circulating water pump and pressure values of water outlets of the first circulating water pump and the second circulating water pump are collected uninterruptedly, and under the condition of normal operation, a current value change rate interval of the first circulating water pump and the second circulating water pump and a pressure value change rate interval of the water outlets of the first circulating water pump and the second circulating water pump are obtained through calculation; setting a corresponding first current change rate threshold value for the first circulating water pump according to the current value change rate interval of the first circulating water pump, setting a corresponding second current change rate threshold value for the second circulating water pump according to the current value change rate interval of the second circulating water pump, setting a corresponding first pressure change rate threshold value according to the pressure value change rate interval of the water outlet of the first circulating water pump, setting a corresponding second pressure change rate threshold value according to the pressure value change interval of the water outlet of the second circulating water pump, and after the first circulating water communication branch and the second circulating water communication branch are conducted, discontinuously obtaining current values corresponding to the first circulating water pump and the second circulating water pump and pressure values corresponding to the water outlets of the first circulating water pump and the second circulating water pump again, and calculating respective current value change rates and pressure value change rates of the water outlets of the circulating water pumps under the operation condition at the moment, comparing current change rate thresholds and pressure change rate thresholds corresponding to the circulating water pumps, if the current value change rate of the first circulating water pump is greater than a preset first current change rate threshold and/or the current value change rate of the second circulating water pump is greater than a preset second current change rate threshold and/or the pressure value change rate of the water outlet of the first circulating water pump is greater than a preset first pressure change rate threshold and/or the pressure value change rate of the water outlet of the second circulating water pump is greater than a preset second pressure change rate threshold, it is indicated that sudden changes occur in the current values and/or the water outlet pressure values in the two circulating water pumps, the first circulating water pump and/or the second circulating water pump may be in an abnormal working condition, and the first circulating water communication branch and the second circulating water branch should be disconnected in time.
Fig. 3 is a schematic structural view of a unit circulating water energy-saving control device provided by the present invention, and as shown in fig. 3, the present invention further provides a unit circulating water energy-saving control device, which is applied to the unit circulating water energy-saving system, and includes:
an obtaining module 201, configured to obtain an operation state and an operation load of each unit in the unit units;
a judging module 202, configured to judge whether the unit set has an outage state according to the operation state, judge whether the unit set that is not in outage state is in full-load operation when the unit set has an outage state, and output a conduction instruction when none of the unit set that is not in outage state is in full-load operation; (ii) a
And the execution module 203 is configured to sequentially turn on the first circulating water communication branch and the second circulating water communication branch according to the turn-on instruction.
According to the invention, through the arrangement of the first circulating water communication branch, the return water of the condenser can be conveyed to the vacant cooling tower, and is conveyed to the condenser for utilization after being cooled by the cooling tower through the second circulating water communication branch, so that the utilization rate of the cooling tower can be increased, the cooling effect and the cooling efficiency can be improved, the energy can be saved, and the energy consumption can be reduced; the invention also sets a standard height difference for reflecting the liquid levels of the first cooling tower and the second cooling tower and judges whether the system normally works according to the current value change rate of the circulating water pump and/or the water outlet pressure value change rate of the circulating water pump, thereby having better protection effect on the device and improving the safety performance.
Those skilled in the art will appreciate that all or part of the steps in the method for implementing the above embodiments may be implemented by a program, which is stored in a storage medium and includes several instructions to enable a single chip, a chip, or a processor (processor) to execute all or part of the steps in the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
While the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the embodiments of the present invention are not limited to the details of the above embodiments, and various simple modifications can be made to the technical solution of the embodiments of the present invention within the technical idea of the embodiments of the present invention, and the simple modifications are within the scope of the embodiments of the present invention. It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the embodiments of the present invention will not be described separately for the various possible combinations.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as disclosed in the embodiments of the present invention as long as it does not depart from the spirit of the embodiments of the present invention.

Claims (10)

1. A unit set circulating water energy-saving system is characterized by comprising:
at least one unit water circulating system, the unit water circulating system includes:
the system comprises a first cooling tower (10), a first pump room forebay (11), a first trash remover (12), a first circulating water pump (13) and a first condenser (14) which are connected in sequence through pipelines; a water outlet of the first circulating water pump (13) is communicated with a water inlet end of the first condenser (14) through a first water inlet pipeline (15); the water outlet end of the first condenser (14) is communicated with the water inlet end of the first cooling tower (10) through a first water return pipeline (16);
the second cooling tower (20), the second pump room forebay (21), the second trash remover (22), the second circulating water pump (23) and the second condenser (24) are connected in sequence through pipelines; a water outlet of the second circulating water pump (23) is communicated with a water inlet end of the second condenser (24) through a second water inlet pipeline (25); the water outlet end of the second condenser (24) is communicated with the water inlet end of the second cooling tower (20) through a second water return pipeline (26);
a first circulating water communication branch (3) is arranged between the first water return pipeline (16) and the second water return pipeline (26);
a second circulating water communication branch (4) is arranged between the first water inlet pipeline (15) and the second water inlet pipeline (25).
2. The unit set circulating water energy-saving system according to claim 1, wherein the first water inlet pipeline (15) and the first water return pipeline (16) are provided with first valves (5), and the two first valves (5) are respectively close to the water inlet end and the water outlet end of the first condenser (14).
3. The unit set circulating water energy-saving system according to claim 1, wherein the pipelines of the second water inlet pipeline (25) and the second water return pipeline (26) are respectively provided with a second valve (6), and the two second valves (6) are respectively close to the water inlet end and the water outlet end of the second condenser (24).
4. The unit set circulating water energy-saving system according to claim 1, wherein a third valve (7) and a flow meter (8) are arranged on each of the first circulating water connecting branch (3) and the second circulating water connecting branch (4).
5. The unit set circulating water energy-saving system according to claim 4, wherein two third valves (7) are respectively arranged on the first circulating water connecting branch (3) and the second circulating water connecting branch (4).
6. The unit set circulating water energy-saving system according to claim 1, wherein liquid level meters are arranged in the first cooling tower (10) and the second cooling tower (20).
7. An energy-saving control method for unit set circulating water, which is applied to the energy-saving system for unit set circulating water of any one of claims 1-6, and is characterized by comprising the following steps:
acquiring the running state of each unit in the unit units;
if the unit set stops running, acquiring the running load of the unit set which is not stopped running;
and if the unit set which is not stopped is not in full-load operation, the first circulating water communication branch and the second circulating water communication branch are conducted in sequence.
8. The energy-saving control method for circulating water of the unit set according to claim 7, further comprising:
determining that the first circulating water communication branch and the second circulating water communication branch are communicated to obtain the current liquid levels of the first cooling tower and the second cooling tower;
calculating the liquid level difference of the first cooling tower and the second cooling tower in real time based on the current liquid levels of the first cooling tower and the second cooling tower, and judging whether the liquid level difference is greater than a preset standard deviation;
if the time period T elapses1And then, adjusting the conducting quantity of the first circulating water communication branch and/or the second circulating water communication branch until the liquid level difference is smaller than the preset standard deviation.
9. The energy-saving control method for circulating water of the unit set according to claim 7, further comprising:
determining the conduction of the first circulating water communication branch and the second circulating water communication branch, and acquiring the current value change rate of the first circulating water pump, the current value change rate of the second circulating water pump, the pressure value change rate of the water outlet of the first circulating water pump and the pressure value change rate of the water outlet of the second circulating water pump;
and if the current value change rate of the first circulating water pump is greater than a preset first current change rate threshold value and/or the current value change rate of the second circulating water pump is greater than a preset second current change rate threshold value and/or the pressure value change rate of the water outlet of the first circulating water pump is greater than a preset first pressure change rate threshold value and/or the pressure value change rate of the water outlet of the second circulating water pump is greater than a preset second pressure change rate threshold value, disconnecting the first circulating water communication branch and the second circulating water communication branch.
10. An energy-saving control device for circulating water of a unit set, which is applied to the energy-saving system for circulating water of a unit set according to any one of claims 1 to 6, and is characterized in that the control device comprises:
the acquisition module is used for acquiring the running state and the running load of each unit in the unit units;
the judging module is used for judging whether the unit set stops running or not according to the running state, judging whether the unit set which is not stopped runs at full load or not under the condition that the unit set stops running, and outputting a conducting instruction under the condition that the unit set which is not stopped does not run at full load;
and the execution module is used for sequentially switching on the first circulating water communication branch and the second circulating water communication branch according to the switching-on instruction.
CN202011293054.3A 2020-11-18 2020-11-18 Unit set circulating water energy-saving system, control method and control device Pending CN112229137A (en)

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CN202011293054.3A CN112229137A (en) 2020-11-18 2020-11-18 Unit set circulating water energy-saving system, control method and control device

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Application Number Priority Date Filing Date Title
CN202011293054.3A CN112229137A (en) 2020-11-18 2020-11-18 Unit set circulating water energy-saving system, control method and control device

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Publication Number Publication Date
CN112229137A true CN112229137A (en) 2021-01-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114562840A (en) * 2022-02-24 2022-05-31 广州中电荔新热电有限公司 Cooling system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114562840A (en) * 2022-02-24 2022-05-31 广州中电荔新热电有限公司 Cooling system

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