CN116161744A - Circulating water utilization system and control method - Google Patents
Circulating water utilization system and control method Download PDFInfo
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- CN116161744A CN116161744A CN202211725957.3A CN202211725957A CN116161744A CN 116161744 A CN116161744 A CN 116161744A CN 202211725957 A CN202211725957 A CN 202211725957A CN 116161744 A CN116161744 A CN 116161744A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/005—Processes using a programmable logic controller [PLC]
- C02F2209/006—Processes using a programmable logic controller [PLC] comprising a software program or a logic diagram
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- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
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Abstract
The application discloses circulating water utilization system and control method, circulating water utilization system and control method include: the ultrafiltration water producing device is used for receiving the raw water provided by the raw water mixing device; the raw water mixing device is used for monitoring the water temperature of raw water and providing raw water for the ultrafiltration water making device, and controlling the inlet amount of raw water and hot circulating water to adjust the water temperature by controlling the opening of the first valve and the second valve, wherein the hot circulating water enters the raw water mixing device through the first circulating water return pipeline and the first valve, and the raw water enters the raw water mixing device through the reservoir water inlet pipeline and the second valve; a circulating water heating means for supplying the raw water mixing means with the hot circulating water; and the demineralized water supplementing device is used for storing the demineralized water generated by the ultrafiltration water producing device and receiving the condensate generated by the circulating water heating device. The application aims to improve the utilization rate of circulating water.
Description
Technical Field
The application relates to the technical field of ultrafiltration water production, in particular to a circulating water utilization system and a control method.
Background
The turbine drags the air separation device of the compressor unit, can scatter the heat of the hot circulating water after heating into the air through the mechanical ventilation tower, thus reduce the circulating water supply temperature and realize the circulating water circulation application, but the circulating water temperature is generally about 30+/-5 ℃ in winter, there is a large amount of low-grade heat energy to scatter into the environment, cause the energy waste, so need to provide a coupling system that can utilize the heat of the hot circulating water effectively for the air separation device.
Disclosure of Invention
The main purpose of the application is to provide a circulating water utilization system and a method, which aim to improve the circulating water utilization rate.
To achieve the above object, the present application provides a circulating water utilization system including: the device comprises an ultrafiltration water making device, a raw water mixing device, a circulating water heating device and a demineralized water supplementing device, wherein the ultrafiltration water making device is connected with the raw water mixing device, the raw water mixing device is connected with the circulating water heating device, and the demineralized water supplementing device is respectively connected with the ultrafiltration water making device, the circulating water heating device and the demineralized water supplementing device;
the ultrafiltration water producing device is used for receiving the raw water provided by the raw water mixing device and producing desalted water by using the raw water;
the raw water mixing device is used for monitoring the water temperature of the raw water and providing the raw water for the ultrafiltration water making device, and controlling the inlet amount of the raw water and the thermal circulating water to adjust the water temperature by controlling the opening degree of a first valve and a second valve, wherein the thermal circulating water enters the raw water mixing device through a first circulating water return pipeline and the first valve, and the raw water enters the raw water mixing device through a reservoir water inlet pipeline and the second valve;
the circulating water heating means for supplying the raw water mixing means with the hot circulating water;
the demineralized water supplementing device is used for storing the demineralized water generated by the ultrafiltration water producing device and receiving the condensate generated by the circulating water heating device.
Optionally, the raw water mixing device includes: a raw water mixing tank and a temperature indicator, the temperature indicator being disposed on the raw water mixing tank;
the raw water mixing tank is for receiving the raw water and the hot circulating water;
the temperature indicator is used for monitoring the water temperature in the raw water mixing tank.
Optionally, the circulating water heating apparatus includes: the device comprises a ventilation tower, a condenser and a steam turbine, wherein the bottom of the ventilation tower is connected with the water inlet end of the condenser through a water supply pipeline at the bottom of the ventilation tower, the water outlet end of the condenser is connected with the ventilation tower through a second circulating water return pipeline, and the condenser is connected with the steam turbine through a condenser air inlet pipeline of the condenser;
the ventilation tower is used for providing circulating water for the condenser and receiving the hot circulating water;
the condenser is used for heating the circulating water and cooling exhaust gas of the steam turbine;
the steam turbine is used for providing exhaust gas for the condenser.
Optionally, the ventilation tower includes: the tower top is connected with the second circulating water return pipeline through a first tower top water inlet pipeline of the tower top;
a water tower inlet valve is arranged on the second circulating water return pipeline, and whether the hot circulating water enters the ventilation tower or not is controlled by controlling the opening and closing of the water tower inlet valve;
the tower top is used for receiving the hot circulating water so as to emit heat of the hot circulating water;
the tower pool is used for receiving raw water from a reservoir, receiving hot circulating water and providing the circulating water to the condenser through the tower bottom water supply pipeline.
Optionally, the ventilation tower includes: the tower top is connected with the second circulating water return pipeline through a first tower top water inlet pipeline of the tower top;
a water tower inlet valve is arranged on the second circulating water return pipeline, and whether the hot circulating water enters the ventilation tower or not is controlled by controlling the opening and closing of the water tower inlet valve;
the tower top is used for receiving the hot circulating water so as to emit heat of the hot circulating water;
the tower pool is used for receiving raw water from a reservoir, receiving hot circulating water and providing the circulating water to the condenser through the tower bottom water supply pipeline.
Optionally, a sand filter and a third valve are arranged on the first circulating water return pipeline;
the sand filter is used for filtering the hot circulating water;
and the third valve is used for controlling whether the hot circulating water enters the sand filter or not by controlling the opening and closing of the third valve.
Optionally, the first circulating water return pipe includes:
sand filtering for filtering the hot circulating water;
and the third valve is used for controlling whether the hot circulating water enters the sand filter or not by controlling the opening and closing of the third valve.
Optionally, the demineralized water supplementing device includes: the condensate pump is connected with the connecting pipeline through a condensate output pipeline of the condensate pump, the demineralized water tank and the demineralized water pump are arranged on the demineralized water output pipeline, and the demineralized water output pipeline is connected with the connecting pipeline;
the condensate pump is used for receiving condensate of the condenser and providing power for the condensate;
the desalting water tank is used for storing desalted water produced by the ultrafiltration water producing device;
the desalting water pump is used for providing power for the desalting water;
the communication pipeline is used for receiving the condensate of the condenser and outputting desalted water to the condensate output pipeline.
In order to achieve the above object, the present application provides a control method of a circulating water utilization system, the control method of the circulating water utilization system including:
acquiring the opening degrees of a first valve and a second valve, wherein the hot circulating water enters a raw water mixing device through a first circulating water return pipeline and the first valve, and raw water enters the raw water mixing device through a reservoir water inlet pipeline and the second valve;
acquiring first water temperature information of raw water in the raw water mixing device, wherein the raw water consists of the heat circulating water and/or raw water;
if the water temperature information is judged to be in accordance with the preset temperature, the opening degree of the first valve and the opening degree of the second valve are maintained, and raw water in the raw water mixing device is sent to the ultrafiltration water producing device.
Optionally, before the step of obtaining the opening degrees of the first valve and the second valve, the control method further includes:
acquiring second water temperature information of the raw water;
and if the second water temperature information is lower than the preset temperature, opening a third valve, wherein the third valve is arranged on the first circulating water return pipeline and is used for controlling the hot circulating water to enter the first circulating water return pipeline.
Optionally, after the step of acquiring the water temperature information of the raw water in the raw water mixing device, the method further includes:
and if the water temperature information is judged to be lower than the preset temperature, adjusting the opening degree of the first valve and/or the second valve.
The application provides a circulating water utilization system and a method, wherein the control method of the circulating water utilization system comprises an ultrafiltration water making device, a raw water mixing device, a circulating water heating device and a desalted water supplementing device, wherein the ultrafiltration water making device is connected with the raw water mixing device, the raw water mixing device is connected with the circulating water heating device, and the desalted water supplementing device is respectively connected with the ultrafiltration water making device, the circulating water heating device and the desalted water supplementing device; the ultrafiltration water producing device is used for receiving the raw water provided by the raw water mixing device and producing desalted water by using the raw water; the raw water mixing device is used for monitoring the water temperature of the raw water and providing the raw water for the ultrafiltration water making device, and controlling the inlet amount of the raw water and the thermal circulating water to adjust the water temperature by controlling the opening degree of a first valve and a second valve, wherein the thermal circulating water enters the raw water mixing device through a first circulating water return pipeline and the first valve, and the raw water enters the raw water mixing device through a reservoir water inlet pipeline and the second valve; the circulating water heating means for supplying the raw water mixing means with the hot circulating water; the demineralized water supplementing device is used for storing the demineralized water generated by the ultrafiltration water producing device and receiving the condensate generated by the circulating water heating device.
The circulating water heating device can heat circulating water, so that the circulating water can be conveyed to the raw water mixing device, and the raw water mixing device can monitor the water temperature, so that the opening of the first valve and the opening of the second valve are controlled according to the water temperature, the raw water mixing device can receive the circulating water through the first circulating water return pipeline where the first valve is located, the water in the reservoir is received through the reservoir water inlet pipeline where the second valve is located, the circulating water in the raw water mixing device and the water in the reservoir can be regulated, the water temperature in the raw water mixing device can be ensured to meet the temperature requirement of the ultrafiltration water making device, and the circulating water can be effectively utilized because the circulating water can enter the raw water mixing device, so that the utilization rate of the circulating water is improved, the energy waste is reduced, the losses of evaporation, wind blowing and the like are reduced, the water cost is also saved, the raw water mixing device provides water with proper temperature for the ultrafiltration water making device, the ultrafiltration water making efficiency is improved, and the ultrafiltration water making quantity is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic block diagram of a circulating water utilization system of the present application;
FIG. 2 is a schematic diagram of the circulating water utilization system of the present application;
FIG. 3 is a schematic flow chart of a second embodiment of a control method of the circulating water utilization system of the present application;
reference numerals illustrate:
the implementation, functional features and advantages of the present application will be further described with reference to the accompanying drawings in conjunction with the embodiments.
Detailed Description
In order to make the above objects, features and advantages of the present application more comprehensible, the following description will make the technical solutions of the embodiments of the present application clear and complete with reference to the accompanying drawings of the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, based on the embodiments herein, which are within the scope of the protection of the present application, will be within the purview of one of ordinary skill in the art without the exercise of inventive faculty.
Example 1
Referring to fig. 1 and 2, in a first embodiment of the circulating water utilization system of the present application, the circulating water utilization system includes: an ultrafiltration water producing apparatus 100, a raw water mixing apparatus 200, a circulating water heating apparatus 300, and a demineralized water replenishing apparatus 400, wherein the ultrafiltration water producing apparatus 100 is connected to the raw water mixing apparatus 200, the raw water mixing apparatus 200 is connected to the circulating water heating apparatus 300, and the demineralized water replenishing apparatus 400 is connected to the ultrafiltration water producing apparatus 100, the circulating water heating apparatus 300, and the demineralized water replenishing apparatus 400, respectively;
an ultrafiltration water producing apparatus 100 for receiving raw water supplied in the raw water mixing apparatus 200 and producing demineralized water using the raw water;
a raw water mixing device 200 for monitoring a water temperature of the raw water and supplying the raw water to the ultrafiltration water producing device 100, and adjusting the water temperature by controlling an opening degree of a first valve 14 and a second valve 12 to control an inflow amount of raw water and hot circulating water, which enters the raw water mixing device 200 through a first circulating water return pipe 34 and the first valve 14, and which enters the raw water mixing device 200 through a reservoir inflow pipe 43 and the second valve 12;
a circulating water heating apparatus 300 for supplying the raw water mixing apparatus 200 with the hot circulating water;
and a demineralized water supplementing device 400 for storing the demineralized water generated by the ultrafiltration water producing device 200 and receiving the condensate generated by the circulation water heating device 300.
In this embodiment, the ultrafiltration water producing apparatus 100 is generally applied to a thermal power plant, the circulating water heated by the circulating water heating apparatus 300 may be supplied to the raw water mixing apparatus 200, or the heat of the circulating water may be emitted to the air by the circulating water heating apparatus, the circulating water heating apparatus 300 outputs the hot circulating water to the raw water mixing apparatus 200, and the circulating water heating apparatus 300 may generate condensate and output the condensate to the demineralized water replenishing apparatus.
Wherein the raw water mixing apparatus 200 includes: raw water mixing tank 1, temperature gauge 28 is arranged on raw water mixing tank 1, raw water mixing tank 1 receives water supply from a reservoir through reservoir water inlet pipeline 43 and second valve 12, raw water mixing tank 1 receives hot circulating water provided by circulating water heating device 300 through first circulating water return pipeline 34 and first valve 14;
a temperature indicator 28, said temperature indicator 28 being used to monitor the temperature of water in raw water mixing tank 1.
Wherein the circulating water heating apparatus 300 includes: the device comprises a ventilation tower 2, a condenser 7 and a steam turbine 6, wherein the bottom of the ventilation tower 2 is connected with the water inlet end of the condenser 7 through a water supply pipeline 35 at the bottom of the ventilation tower 2, the water outlet end of the condenser 7 is connected with the ventilation tower 2 through a second circulating water return pipeline 36, and the condenser 7 is connected with the steam turbine 6 through a condenser air inlet pipeline 46 of the condenser 7;
a ventilation tower 2 for providing circulating water to the condenser 7 and receiving the hot circulating water;
a condenser 7 for heating the circulating water and cooling the exhaust gas of the steam turbine 6;
and a steam turbine 6 for supplying exhaust gas to the condenser 7.
In this embodiment, the ultrafiltration water producing apparatus 11 and the raw water mixing tank 1 are used for producing demineralized water, wherein the produced demineralized water is input into the demineralized water tank 10, the ventilation tower 2, the sand filter 3, the steam turbine 6 and the condenser 7 are used for realizing circulating water circulation, the ultrafiltration water producing apparatus 11 is used for producing demineralized water, the raw water mixing tank 1 is used for providing raw water for producing demineralized water for the ultrafiltration water producing apparatus 11, the ventilation tower 2 is used for providing circulating water for the condenser 7 and radiating heat generated by the circulating water into the air, the steam turbine 6 is used for providing exhaust gas for the steam condenser 7, the steam condenser 7 is used for heating the circulating water and cooling the exhaust gas, the circulating water inlet valve 14 is used for controlling whether the heated circulating water enters the raw water mixing tank 1, the raw water supplementing valve 12 is used for providing the raw water mixing tank 1, and the temperature standard 28 is used for monitoring the temperature of the raw water mixing tank 1.
It should be understood that the circulating water utilization system of the present embodiment is applicable to a system for providing an ultrafiltration water producing apparatus with a suitable temperature, and for example, the circulating water utilization system may be applied to a thermal power plant which may be used for producing demineralized water and an air separation apparatus which may be used for providing circulating water heat.
Wherein the ventilation tower 2 comprises: a tower top 51 and a tower pool 52, the tower pool 52 is connected with the second circulating water return pipe 36 through a tower pool return pipe of the tower pool 52, and the tower top 51 is connected with the second circulating water return pipe 36 through a first tower top inlet pipe 38 of the tower top 51;
a water tower inlet valve 17 is arranged on the second circulating water return pipeline 36, and whether the hot circulating water enters the ventilation tower 2 is controlled by controlling the opening and closing of the water tower inlet valve 17;
the tower top 51 for receiving the heat circulating water to emit heat of the heat circulating water;
the tower pool 52 is used for receiving raw water from the reservoir 50, receiving hot circulating water and providing the circulating water to the condenser 7 through the tower bottom water supply pipeline 35.
Specifically, the tower top 51 further includes a first tower top 47 and a second tower top 48;
the first tower top 47 is connected with the second circulating water return pipeline 39 through a first tower top water inlet pipeline 38, and a first water tower inlet upper tower valve 15 is arranged on the first tower top water inlet pipeline 38;
the second tower top 48 is connected with the second circulating water return pipeline 39 through a second tower top water inlet pipeline 48, and a second water tower inlet upper tower valve 48 is arranged on the second tower top water inlet pipeline 39;
wherein, the water supply pipeline 35 at the bottom of the tower is provided with a filter 4 and a circulating water pump 5;
the filter 4 is used for filtering circulating water of the ventilation tower 2, the circulating water pump 5 is used for providing power for the circulating water and conveying the circulating water to the condenser 7.
Wherein, the first circulating water return pipeline 34 is provided with a sand filter 3 and a third valve 20;
the sand filter 3 is used for filtering the hot circulating water;
and the third valve 20 controls whether the hot circulating water enters the sand filter 3 by controlling the opening and closing of the third valve 20.
In this embodiment, the circulating water utilization system further includes a reservoir 50, and the reservoir 50 is used to supply raw water to the ventilation tower 2 and the raw water mixing tank 1. The tower pool of the ventilation tower 2 is connected with a reservoir 50 through a reservoir water inlet pipeline 49, and a tower pool water return pipeline 37 of a tower Chi Tongguo of the ventilation tower is connected with the second circulating water return pipeline 36.
The water inlet pipeline 49 of the tower pool Chi Tongguo of the ventilation tower 2 is connected with the second circulating water return pipeline 36, and the water supplementing valve 13 of the water tower is arranged on the water inlet pipeline 49 of the tower pool.
Further, raw water mixing tank 1 is connected to first circulating water return line 34;
a third circulating water return pipeline 45 is arranged on the first circulating water return pipeline 36, a tower Chi Banglu valve 19 is arranged on the third circulating water return pipeline 45, the third circulating water return pipeline 45 is connected with a tower pool return pipeline 37, and the tower pool return pipeline 37 is connected with a tower pool of the ventilation tower 2;
the first circulating water return pipeline 34 is provided with a water plant inlet valve 29, the first circulating water return pipeline 36 is provided with a sand filter 3 and a sand filter return valve 20, and the second circulating water return pipeline 36 is provided with a first water tower return valve 17, wherein the sand filter 3 is used for filtering impurities in circulating water and removing suspended matters, organic matters and the like in the circulating water.
Specifically, the bottom water outlet pipeline 35 is connected with the first condenser water inlet pipeline 30 of the condenser 7 and the second condenser water inlet pipeline 31 of the condenser 7, the first condenser water inlet pipeline 30 is connected with the first condenser water return pipeline 32, the second condenser water inlet pipeline 31 is connected with the second condenser water return pipeline 33, the first condenser water supply valve 23 is arranged on the first condenser water inlet pipeline 30, the second condenser water supply valve 24 is arranged on the second condenser water inlet pipeline 31, the first condenser water return valve 21 is arranged on the first condenser water return pipeline 32, the second condenser water return pipeline 33 is provided with the second condenser water return valve 22, and the second circulating water return pipeline 36 is communicated with the first condenser water return pipeline 34 and the second condenser water return pipeline 36.
In this embodiment, the water-tower water-replenishing valve 13 provides water to the ventilation tower 2, when the water-tower water-replenishing valve 13 is opened, the ventilation tower 2 receives raw water from the reservoir 50, the first water-tower water-inlet upper-tower valve 15 and the second water-tower water-inlet upper-tower valve 16 are used for controlling the input of circulating water from the first tower top 47 and the second tower top 48 of the ventilation tower 2, when the first water-tower water-inlet upper-tower valve 15 and the second water-tower water-inlet upper-tower valve 16 are opened, the circulating water enters the first tower top 47 and the second tower top 48 of the ventilation tower 2 to emit circulating water heat into the air, the second water-tower water-return valve 18 is used for controlling whether the circulating water enters the tower pool of the ventilation tower 2, when the second water-return valve 18 is opened, the circulating water is less in heat dissipation than when the circulating water is output from the first water-tower top 47 and the second water-tower top 48, the first water-tower water-return valve 15 is used for controlling whether the circulating water enters the ventilation tower 2, the circulating water-return valve 20 is used for controlling whether the circulating water enters the sand-filtering water tank 1, and the sand-filtering water tank is used for mixing the circulating water. The first water supply valve 23 and the second water supply valve 24 are used for controlling whether circulating water enters the condenser, and the first water return valve 21 and the second water return valve 22 are used for controlling whether the heated circulating water enters the second circulating water return pipeline 36. The bottom water outlet pipeline 34 is provided with a filter 4 and a circulating water pump 5, the filter 4 is used for filtering impurities in circulating water, and the circulating water pump 5 is used for providing power for the circulating water and conveying the circulating water to the condenser 7.
In addition, it should be noted that the ventilation tower 2 may receive raw water from a reservoir, the bottom of the ventilation tower 2 is provided with circulating water to the condenser 7 through the filter 4 and the circulating water pump 5 sequentially passing through the bottom water outlet pipe 35, when the first water supply valve 23, the second water supply valve 24, the first water return valve 21 and the second water return valve 22 of the condenser are opened, the circulating water two-way enters the first water inlet pipe 30 and the second water inlet pipe 31 of the condenser, because the first water inlet pipe 30 of the condenser is communicated with the first water return pipe 32 of the condenser, the circulating water enters the first water return pipe 32 after entering the first water inlet pipe 30 of the condenser, and because the second water inlet pipe 31 of the condenser is communicated with the second water return pipe 34 of the condenser, when the circulating water passes through the first water inlet pipe 30 of the condenser, the second water return pipe 21 of the condenser, the second water return pipe 31 enters the first water return pipe 34 of the condenser, and the second water return pipe 34 of the condenser, and when the first water return pipe 33 of the condenser is opened, the second water inlet pipe 15 of the second water return pipe is discharged from the first water return pipe 34 of the condenser, the circulating water is heated, and when the second water inlet pipe 33 of the circulating water is heated, the circulating water is discharged from the first water return pipe 34 of the second water return pipe 16 of the condenser, and the circulating water is opened, the circulating water is discharged from the first water return pipe 15 of the second water return pipe is opened, the circulation water is emitted into the air by heat, and when the second water tower water return valve 18 is opened, the heated circulation water directly enters the tower pool of the ventilation tower 2.
Further, when the first water tower water return valve 17 and the circulating water inlet valve 14 are opened and the first water tower water return valve 17 is closed, the heated circulating water passes through the sand filter 3 and the first circulating water return pipe and enters the raw water mixing tank 2, wherein the first water tower valve 17 can be opened and redundant circulating water can be sent into the ventilation tower 2.
It should be understood that, in this embodiment, the valves may be electrically operated valves, and the magnitude of opening of the valves may be adjusted.
Wherein the demineralized water supplementing apparatus 400 comprises: the condensate pump 8 is connected with the connecting pipeline 46 through a condensate output pipeline 41 of the condensate pump 8, the demineralized water tank 10 and the demineralized water pump 9 are arranged on a demineralized water output pipeline 40, and the demineralized water output pipeline 40 is connected with the connecting pipeline 42;
the condensate pump 8 is used for receiving condensate of the condenser 7 and providing power for the condensate;
the demineralized water tank 10 is used for storing the demineralized water produced by the ultrafiltration water producing device 100;
the desalted water pump 9 is used for providing power for the desalted water;
the communication pipeline 42, the communication pipeline 42 is configured to receive the condensate of the condenser 7 and output desalted water to the condensate output pipeline 41.
Further, the circulating water utilization system further comprises a condensate pump 8, a desalting water tank 10 and a desalting water pump 9;
the bottom of the condenser is connected with a condensate pump 8 through a condensate pump water inlet pipeline 44, and the condensate pump 8 outputs condensate to a power plant through a condensate water outlet pipeline 44 of the condensate pump 8;
the ultrafiltration water making device 11 is provided with a desalted water outlet pipeline 40 for connection, and the desalted water outlet pipeline 40 is provided with a desalted water tank 8 and a desalted water pump 9;
a communication pipeline 42 is arranged between the desalted water outlet pipeline 44 and the condensate water outlet pipeline, and a communication valve 26 is arranged on the communication pipeline 42, wherein the communication pipeline 42 and the communication valve 26 are used for realizing the mutual supplement between the condensate water and the desalted water, and the condensate water and the desalted water can be output to a power plant.
The circulating water utilization system comprises an ultrafiltration water making device 11, a raw water mixing box 1, a ventilation tower 2, a steam turbine 6 and a condenser 7; ultrafiltration water producing apparatus 11 is connected in series with raw water mixing tank 1 via ultrafiltration water producing inlet conduit 45; the raw water mixing box 1 is connected with a first circulating water return pipeline 34, a circulating water inlet valve 14 is arranged on the first circulating water return pipeline 34, a reservoir inlet pipeline 43 is arranged on the raw water mixing box 1, a raw water supplementing valve 12 is arranged on the reservoir inlet pipeline 43, and a temperature mark 28 is arranged on the raw water mixing box 1; the bottom of the ventilation tower 2 is communicated with the condenser 7 through a bottom water outlet pipeline 35, the first circulating water return pipeline 34 is connected with a second circulating water return pipeline 36, and the condenser second return pipeline 36 is communicated with a condenser first return pipeline 32 and a condenser second return pipeline 33 of the condenser 7; the steam turbine 6 is communicated with the condenser 7 through a condenser air inlet pipeline 46.
Because the bottom of the ventilation tower 2 conveys circulating water to the condenser 7, the condenser 7 is connected with the steam turbine 6, the exhaust gas generated by the steam turbine 6 enters the condenser 7, so the circulating water passing through the condenser 7 can be heated, when the water temperature in the raw water mixing tank 1 is lower than the proper temperature for ultrafiltration water production, the sand filtration water return valve 20 and the circulating water inlet valve 14 are opened, the heated circulating water enters the first circulating water return pipeline 34 through the first condenser water return pipeline 32 and the second condenser water return pipeline 22 and then enters the raw water mixing tank 1, thereby heating the raw water mixing tank 1, and because the raw water mixing tank 1 is provided with the temperature mark 28, the opening amplitude of the circulating water inlet valve 14 and the opening amplitude of the raw water supplementing valve 12 are automatically adjusted through the temperature displayed on the temperature mark 28, and the temperature of the water in the raw water mixing tank 1 is ensured to meet the temperature requirement for ultrafiltration water production.
Therefore, the present application, by adding heated circulating water to raw water mixing tank 1, not only effectively utilizes the low quality heat of the circulating water, but also continuously provides raw water at a suitable temperature to ultrafiltration water producing apparatus 11.
Example two
With further reference to fig. 3, an embodiment of the present application provides a control method of a circulating water utilization system, where in an embodiment of the control method of a circulating water utilization system of the present application, the control method of a circulating water utilization system includes:
step S10, opening degrees of a first valve and a second valve are obtained, wherein hot circulating water enters a raw water mixing device through a first circulating water return pipeline and the first valve, and raw water enters the raw water mixing device through a reservoir water inlet pipeline and the second valve;
step S20 of acquiring first water temperature information of raw water in the raw water mixing device, wherein the raw water is composed of the heat cycle water and/or raw water;
and step S30, if the water temperature information is judged to be in accordance with the preset temperature, maintaining the opening degree of the first valve and the opening degree of the second valve, and sending the raw water in the raw water mixing device into an ultrafiltration water making device.
In this embodiment, the raw water mixing device provides raw water to the ultrafiltration water producing device, where the raw water is raw water required by the ultrafiltration water producing device to produce demineralized water, and the raw water temperature needs to be maintained in a certain range to ensure that the ultrafiltration water producing device efficiently produces demineralized water, for example, when the raw water required by the ultrafiltration water producing device is 25±5 ℃, the water permeability of the ultrafiltration water producing film in the ultrafiltration device can be increased, so that the ultrafiltration water producing amount of the ultrafiltration device is increased. The raw water mixing device monitors the temperature of the raw water mixing box through a temperature mark in the raw water mixing device, the raw water mixing device is further provided with a liquid level meter, the liquid level meter can monitor the liquid level of the raw water mixing device, liquid level information in the raw water mixing box is obtained through the liquid level meter, and the opening and closing of the first valve and the second valve can be controlled according to the liquid level information, so that the liquid level in the raw water mixing box is ensured to be stable. The circulating water heating device is used for heating the circulating water and can also be used for emitting heat of the circulating water. The first circulating water return pipeline is also provided with a sand filter, the sand filter is used for filtering circulating water, and water in the raw water mixing device enters the ultrafiltration water making device through the ultrafiltration water making water inlet pipeline so as to be supplied to the ultrafiltration water making device to produce desalted water.
In addition, it should be noted that the first water temperature information is the temperature of raw water in the raw water mixing tank, the water temperature information is obtained by a temperature indicator, the second water temperature information is the water temperature information of raw water, when only raw water enters the raw water mixing tank, the water temperature information of raw water can be measured, or the temperature of raw water in a reservoir can be measured again directly, the water temperature information of raw water is obtained, the opening degree is the opening degree of a valve to control the water quantity of circulating water or raw water entering the raw water mixing device, when the hot circulating water and raw water enter the raw water mixing tank at the same time, the temperature indicator can monitor the water temperature in the raw water mixing tank in real time, the opening degree of the first valve and the second valve is controlled again according to the water temperature until the water temperature in the raw water mixing tank accords with a preset temperature, the preset temperature comprises a first preset temperature and a second preset temperature, and the preset temperature can be any temperature between the first preset temperature and the second preset temperature. For example, when the water temperature floats at 25±5 ℃, the opening of the first valve and the second valve may be maintained to maintain the water temperature in the raw water mixing tank, when the water temperature is below 20 ℃, the opening of the first valve may be increased or the opening of the second valve may be decreased until the water temperature in the raw water mixing tank is between 20 ℃ and 30 ℃, including 20 ℃ and 30 ℃, the amplitude of the first valve and the second valve stops being varied, and when the water temperature is above 20 ℃, the opening of the first valve may be decreased or the opening of the second valve may be increased until the water temperature in the raw water mixing tank is between 20 ℃ and 30 ℃, including 20 ℃ and 30 ℃, the amplitude of the first valve and the second valve stops being varied.
As an example, steps S10 to S30 include: acquiring the opening degrees of the first valve and the second valve; determining the inflow of the hot circulating water according to the opening of the first valve, and determining the inflow of the raw water according to the opening of the second valve; acquiring the first water temperature information of the heat circulating water and the raw water after entering the raw water mixing device, if the first water temperature information is judged to be in accordance with a preset temperature, keeping the opening degree of a first valve and a second valve unchanged and sending the raw water in the raw water mixing device into an ultrafiltration water preparation device; and if the first water temperature information is judged to be not in accordance with the preset temperature, adjusting the opening degree of the first valve and/or the second valve.
Before the step of obtaining the opening degrees of the first valve and the second valve, the control method further includes:
step A10, obtaining second water temperature information of the raw water;
and step A20, if the second water temperature information is lower than the preset temperature, opening a third valve, wherein the third valve is arranged on the first circulating water return pipeline and is used for controlling the hot circulating water to enter the first circulating water return pipeline.
In this embodiment, before the opening degrees of the first valve and the second valve are adjusted, it is determined whether the first valve and the second valve are required to be opened, when the second water temperature information is lower than the first preset temperature, the raw water temperature in the raw water mixing tank does not conform to the temperature required by the ultrafiltration water making device, so that the third valve is required to be opened to receive the hot circulating water, the opening degree of the second valve is controlled to control the amount of the hot circulating water entering the raw water mixing tank, when the first water temperature information is higher than the second preset temperature, it is determined that the temperature in the raw water mixing tank has reached the raw water temperature required by the ultrafiltration water making device, the third valve is closed, the raw water mixing device stops receiving the hot circulating water, and the second valve is opened. The third valve is arranged on the first circulating water return pipeline and is used for controlling the hot circulating water to enter the first circulating water return pipeline. Wherein, raw water mixing arrangement includes raw water mixing box, raw water mixing box is used for receiving the hot circulating water with raw water, predetermine the temperature and include first predetermine temperature and second predetermine temperature, predetermine the temperature can be any temperature between first predetermine temperature and the second predetermine temperature. The first preset temperature is the lowest temperature which meets the water temperature of the ultrafiltration water making, the second preset temperature is the highest temperature which meets the water temperature of the ultrafiltration water making, for example, in summer, the raw water temperature meets the water temperature required by the ultrafiltration water making device, and the third valve can be closed to stop providing the hot circulating water to the raw water mixing device.
As an example, steps a10 to a20 include: acquiring second water temperature information of the raw water; if the second water temperature information is judged to be lower than the first preset temperature, a third valve is opened, the opening degrees of the second valve and the first valve are determined, and the raw water mixing device receives the raw water and the hot circulating water; and if the first water temperature information is higher than the second preset temperature value, the third valve is closed, the first valve is opened, the raw water mixing device receives the raw water, and the reception of the heat circulating water is stopped.
Wherein, after the step of acquiring the first water temperature information of the raw water in the raw water mixing device, the method further includes:
and step B10, if the first water temperature information is judged to be lower than the preset temperature, adjusting the opening degree of the first valve and/or the second valve.
In this embodiment, it should be noted that, if the preset temperature includes a first preset temperature and a second preset temperature, the first water temperature information is considered to be in accordance with the preset temperature if the first water temperature information is within a range of the first preset temperature and the second preset temperature, and may also include the first preset temperature and the second preset temperature, where the first preset temperature is represented as a lowest temperature of the preset temperatures, and the second preset temperature is represented as a highest temperature of the preset temperatures.
As an example, step B10 includes: judging whether the first water temperature information accords with the preset temperature, if the first water temperature information is lower than the first preset temperature, increasing the opening of the first valve or reducing the opening of the second valve until the first water temperature information accords with the preset temperature; if the first water temperature information is higher than the second preset temperature, reducing the opening of the first valve or increasing the opening of the second valve until the first water temperature information accords with the preset temperature; and feeding the raw water in the raw water mixing device into an ultrafiltration water making device.
The application provides a circulating water utilization system and a control method, wherein the control method of the circulating water utilization system comprises the steps of obtaining the opening degrees of a first valve and a second valve, wherein hot circulating water enters a raw water mixing device through a first circulating water return pipeline and the first valve, and raw water enters the raw water mixing device through a reservoir water inlet pipeline and the second valve; acquiring first water temperature information of raw water in the raw water mixing device, wherein the raw water consists of the heat circulating water and/or raw water; if the water temperature information is judged to be in accordance with the preset temperature, maintaining the opening of the first valve and the second valve, and sending the raw water in the raw water mixing device into an ultrafiltration water making device
The circulating water heating device can heat circulating water, so that the circulating water can be conveyed to the raw water mixing device, the raw water mixing device can monitor the water temperature, the opening of the first valve and the opening of the second valve are controlled according to the water temperature, the raw water mixing device can receive the circulating water through the first circulating water return pipeline where the first valve is located, the water in the reservoir is received through the reservoir water inlet pipeline where the second valve is located, the circulating water in the raw water mixing device and the water in the reservoir can be regulated, the water temperature in the raw water mixing device can be ensured to meet the temperature requirement of the ultrafiltration water making device, and the heat of the circulating water can be effectively utilized because the circulating water can enter the raw water mixing device, so that the low-quality heat utilization rate of the circulating water is improved, the energy waste is reduced, the losses of evaporation, wind blowing and the like of the water tower are reduced, the water cost is also saved, the water mixing device provides water with proper temperature for ultrafiltration water making, the ultrafiltration water making efficiency is improved, and the ultrafiltration water making amount is improved.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the scope of the claims, and all equivalent structures or equivalent processes using the descriptions and drawings of the present application, or direct or indirect application in other related technical fields are included in the scope of the claims.
Claims (10)
1. A circulating water utilization system, characterized in that the circulating water utilization system comprises: the device comprises an ultrafiltration water making device, a raw water mixing device, a circulating water heating device and a demineralized water supplementing device, wherein the ultrafiltration water making device is connected with the raw water mixing device, the raw water mixing device is connected with the circulating water heating device, and the demineralized water supplementing device is respectively connected with the ultrafiltration water making device, the circulating water heating device and the demineralized water supplementing device;
the ultrafiltration water producing device is used for receiving the raw water provided by the raw water mixing device and producing desalted water by using the raw water;
the raw water mixing device is used for monitoring the water temperature of the raw water and providing the raw water for the ultrafiltration water making device, and controlling the inlet amount of the raw water and the thermal circulating water to adjust the water temperature by controlling the opening degree of a first valve and a second valve, wherein the thermal circulating water enters the raw water mixing device through a first circulating water return pipeline and the first valve, and the raw water enters the raw water mixing device through a reservoir water inlet pipeline and the second valve;
the circulating water heating means for supplying the raw water mixing means with the hot circulating water;
the demineralized water supplementing device is used for storing the demineralized water generated by the ultrafiltration water producing device and receiving the condensate generated by the circulating water heating device.
2. The circulating water utilization system of claim 1, wherein the raw water mixing means comprises: a raw water mixing tank and a temperature indicator, the temperature indicator being disposed on the raw water mixing tank;
the raw water mixing tank is for receiving the raw water and the hot circulating water;
the temperature indicator is used for monitoring the water temperature in the raw water mixing tank.
3. The circulating water utilization system of claim 1, wherein the circulating water heating means comprises: the device comprises a ventilation tower, a condenser and a steam turbine, wherein the bottom of the ventilation tower is connected with the water inlet end of the condenser through a water supply pipeline at the bottom of the ventilation tower, the water outlet end of the condenser is connected with the ventilation tower through a second circulating water return pipeline, and the condenser is connected with the steam turbine through a condenser air inlet pipeline of the condenser;
the ventilation tower is used for providing circulating water for the condenser and receiving the hot circulating water;
the condenser is used for heating the circulating water and cooling exhaust gas of the steam turbine;
the steam turbine is used for providing exhaust gas for the condenser.
4. The circulating water utilization system of claim 3, wherein the ventilation tower comprises: the tower top is connected with the second circulating water return pipeline through a first tower top water inlet pipeline of the tower top;
a water tower inlet valve is arranged on the second circulating water return pipeline, and whether the hot circulating water enters the ventilation tower or not is controlled by controlling the opening and closing of the water tower inlet valve;
the tower top is used for receiving the hot circulating water so as to emit heat of the hot circulating water;
the tower pool is used for receiving raw water from a reservoir, receiving hot circulating water and providing the circulating water to the condenser through the tower bottom water supply pipeline.
5. The circulating water utilization system of claim 4, wherein a filter and a circulating water pump are arranged on the water supply pipeline at the bottom of the tower;
the filter is used for filtering circulating water of the ventilation tower, and the circulating water pump is used for providing power for the circulating water and conveying the circulating water to the condenser.
6. The circulating water utilization system of claim 1, wherein a sand filter and a third valve are provided on the first circulating water return pipe;
the sand filter is used for filtering the hot circulating water;
and the third valve is used for controlling whether the hot circulating water enters the sand filter or not by controlling the opening and closing of the third valve.
7. The circulating water utilization system of claim 1, wherein the demineralized water replenishing means comprises: the condensate pump is connected with the connecting pipeline through a condensate output pipeline of the condensate pump, the demineralized water tank and the demineralized water pump are arranged on the demineralized water output pipeline, and the demineralized water output pipeline is connected with the connecting pipeline;
the condensate pump is used for receiving condensate of the condenser and providing power for the condensate;
the desalting water tank is used for storing desalted water produced by the ultrafiltration water producing device;
the desalting water pump is used for providing power for the desalting water;
the communication pipeline is used for receiving the condensate of the condenser and outputting desalted water to the condensate output pipeline.
8. A control method of a circulating water utilization system, characterized by being applied to the circulating water utilization system according to any one of claims 1 to 7, comprising:
acquiring the opening degrees of a first valve and a second valve, wherein the hot circulating water enters a raw water mixing device through a first circulating water return pipeline and the first valve, and raw water enters the raw water mixing device through a reservoir water inlet pipeline and the second valve;
acquiring first water temperature information of raw water in the raw water mixing device, wherein the raw water consists of the heat circulating water and/or raw water;
if the water temperature information is judged to be in accordance with the preset temperature, the opening degree of the first valve and the opening degree of the second valve are maintained, and raw water in the raw water mixing device is sent to the ultrafiltration water producing device.
9. The control method of the circulating water utilization system of claim 8, wherein before the step of obtaining the opening degrees of the first valve and the second valve, the control method further comprises:
acquiring second water temperature information of the raw water;
and if the second water temperature information is lower than the preset temperature, opening a third valve, wherein the third valve is arranged on the first circulating water return pipeline and is used for controlling the hot circulating water to enter the first circulating water return pipeline.
10. The control method of the circulating water utilization system of claim 8 further comprising, after the step of acquiring first water temperature information of raw water in the raw water mixing apparatus:
and if the first water temperature information is judged to be lower than the preset temperature, adjusting the opening degree of the first valve and/or the second valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202211725957.3A CN116161744A (en) | 2022-12-30 | 2022-12-30 | Circulating water utilization system and control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211725957.3A CN116161744A (en) | 2022-12-30 | 2022-12-30 | Circulating water utilization system and control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117515991A (en) * | 2023-10-18 | 2024-02-06 | 长江勘测规划设计研究有限责任公司 | System and method for efficiently and circularly utilizing water-cooling heat resources of river in water-saving manner |
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2022
- 2022-12-30 CN CN202211725957.3A patent/CN116161744A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117515991A (en) * | 2023-10-18 | 2024-02-06 | 长江勘测规划设计研究有限责任公司 | System and method for efficiently and circularly utilizing water-cooling heat resources of river in water-saving manner |
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