CN112415965A - Circulating water digital online monitoring control device and method - Google Patents
Circulating water digital online monitoring control device and method Download PDFInfo
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- CN112415965A CN112415965A CN202011275861.2A CN202011275861A CN112415965A CN 112415965 A CN112415965 A CN 112415965A CN 202011275861 A CN202011275861 A CN 202011275861A CN 112415965 A CN112415965 A CN 112415965A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS], computer integrated manufacturing [CIM]
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/26—Pc applications
- G05B2219/2605—Wastewater treatment
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The invention provides a circulating water digital on-line monitoring control device, which comprises: the circulating water tank is communicated with the cooling tower and is connected with the heat exchanger through the circulating pipeline, the medicament control device is connected with the circulating water tank and is used for feeding medicaments into the circulating water tank, circulating water is treated in the circulating water tank, enters the heat exchanger through the circulating pipeline for heat exchange, flows into the cooling tower for cooling and then returns to the circulating water tank; the invention monitors and controls the water quantity, the medicament quantity, the water quality and the dirt thermal resistance of the heat exchanger through the circulating water digital online monitoring and controlling device, realizes the purpose of controlling the concentration ratio of circulating water by automatically adjusting the medicament adding quantity to achieve the reduction of circulating water sewage, and effectively realizes the economic zero discharge of wastewater through the pretreatment of the circulating water sewage, the advanced treatment and recycling of the circulating water sewage and the swirl atomization and evaporation treatment of tail-end wastewater.
Description
Technical Field
The invention relates to wastewater zero discharge treatment, in particular to a circulating water digital online monitoring control device and method.
Background
The circulating cooling water system is a system which is used in thermal power plants and has the largest water discharge amount, and is also a key difficulty in water saving and emission reduction. Under the new environmental protection requirements of a pollution discharge permission system of a water pollution prevention action plan, water saving, sewage treatment effect improvement, dosing and management automation are problems which need to be solved urgently at present, and particularly, the water saving and decrement treatment of the circulating water and sewage of a thermal power plant becomes a current hot research technology. The circulating water sewage treatment technology is coagulation clarification → filtration → ultrafiltration-reverse osmosis treatment technology, the concentration multiplying power of circulating water is generally controlled to be 3-5 times, the problems of membrane scaling, pollution blockage and corrosion are easy to occur, the chemical cleaning period is relatively short, perfect wastewater pretreatment is generally required to be added for ensuring the safe and stable operation of the system, the investment and operation cost are high, and the prior art is still not perfect for wastewater treatment.
Disclosure of Invention
Aiming at the problem that the prior art can not perfect the treatment of the wastewater, the invention provides a circulating water digital online monitoring control device, which comprises: the device comprises a medicament control device, a circulating water tank, a cooling tower, a circulating pipeline and a heat exchanger;
the circulating water tank is communicated with the cooling tower, the circulating water tank is connected with the heat exchanger through a circulating pipeline, and the medicament control device is connected with the circulating water tank and used for feeding medicaments into the circulating water tank;
circulating water is treated in the circulating water tank, enters the heat exchanger through a circulating pipeline for heat exchange, flows into the cooling tower for cooling and returns to the circulating water tank.
Preferably, the medicament control device comprises an equipment controller, a medicament feeding device and a water quality monitoring instrument;
the equipment controller is in communication connection with the medicament feeding device and the water quality monitoring instrument;
the medicament feeding device is connected with the circulating water tank and used for feeding medicaments, and the water quality monitoring instrument is arranged at the outlet of the circulating water tank and used for monitoring water quality.
Preferably, the number of the circulating pipelines is two, each pipeline is provided with a circulating pump, and the heat exchanger is provided with a first drainage port for draining water.
Preferably, the device also comprises a water replenishing tank, wherein one end of the water replenishing tank is connected with the circulating water tank, and the other end of the water replenishing tank is connected with a water inlet for entering circulating water;
the circulating water tank is provided with a second sewage draining outlet for draining circulating water.
Preferably, the water inlet and the water outlet of the water inlet and the second sewage draining outlet are respectively provided with a water quantity measuring instrument.
Preferably, the medicament feeding device is provided with a medicament metering instrument.
Based on the same invention concept, the invention also provides a circulating water digital online monitoring control method, which comprises the following steps:
circulating water is treated by a circulating water tank for feeding the medicament by a medicament control device;
and the heat exchange liquid enters the heat exchanger through a circulating pipeline for heat exchange, flows into the cooling tower for cooling and then returns to the circulating water tank.
Preferably, the circulating water is handled the back through the circulation tank that the medicament was put in to the medicament delivery device, includes:
the medicament control device monitors the water quality of the circulating water through a water quality monitoring instrument;
the medicament control device controls the medicament feeding device to feed the medicament to the circulating water tank according to the water quality condition monitored by the water quality monitoring instrument, and circulating water is treated.
Preferably, the medicament controlling means controls the medicament feeding device to feed the medicament to the circulating water tank according to the water quality, and the circulating water is treated by the medicament controlling means, including:
the water inflow and the water discharge determined by the water quantity measuring instrument, and the dosage of the medicament determined by the medicament measuring instrument and the concentration ratio of the circulating water are used for treating the circulating water.
Preferably, after entering the heat exchanger through a circulation pipeline for heat exchange and flowing into the cooling tower for cooling and returning to the circulation water tank, the heat exchanger further comprises:
treating the treated circulating sewage through a permeation device and a reverse osmosis device to obtain product water and super-concentrated water;
the product water passes through an ultrafiltration water tank and is used as boiler make-up water;
and evaporating the super-concentrated water by using a rotational flow atomization flue, thereby realizing zero discharge of wastewater.
Compared with the prior art, the invention has the beneficial effects that:
1. circulating water digital on-line monitoring control device includes: the system comprises a medicament control device, a circulating water tank, a cooling tower, a circulating pipeline and a heat exchanger, wherein the circulating water tank is communicated with the cooling tower and is connected with the heat exchanger through the circulating pipeline; the invention carries out heat exchange through the heat exchanger, maintains the temperature of the wastewater through the cooling tower, and adds the medicament control device to treat the wastewater.
2. The invention monitors and controls the water quantity, the chemical agent quantity, the water quality, the dirt thermal resistance of equipment and the corrosion rate through the circulating water digital online monitoring and controlling device, thereby realizing the purpose of controlling the concentration ratio of circulating water by automatically adjusting the chemical agent adding quantity to achieve the reduction of circulating water sewage, and effectively realizing the economic zero discharge of wastewater through the pretreatment of the circulating water sewage, the deep treatment and recycling of the circulating water sewage and the rotational flow atomization, evaporation and solidification treatment of tail-end wastewater.
Drawings
FIG. 1 is a schematic view of the process flow of the present invention for digital treatment of circulating water;
FIG. 2 is a schematic diagram of a process flow for zero discharge of waste water from a thermal power plant according to the present invention.
Detailed Description
The embodiments of the present invention will be further explained with reference to the drawings.
Example 1
The invention provides a circulating water digital on-line monitoring control device, which comprises: the device comprises a medicament control device, a circulating water tank, a cooling tower, a circulating pipeline and a heat exchanger;
the circulating water tank is communicated with the cooling tower, the circulating water tank is connected with the heat exchanger through a circulating pipeline, and the medicament control device is connected with the circulating water tank and used for feeding medicaments into the circulating water tank;
circulating water is treated in the circulating water tank, enters the heat exchanger through the circulating pipeline for heat exchange, flows into the cooling tower for cooling and returns to the circulating water tank.
The medicament control device comprises a device controller, a medicament feeding device and a water quality monitoring instrument;
the equipment controller is in communication connection with the medicament feeding device and the water quality monitoring instrument;
the medicament feeding device is connected with the circulating water tank and used for feeding medicaments, and the water quality monitoring instrument is arranged at the outlet of the circulating water tank and used for monitoring water quality.
The circulating line is equipped with two, all is equipped with the circulating pump on every pipeline, and the heat exchanger is equipped with the first drain outlet of drainage.
The device also comprises a water replenishing tank, one end of the water replenishing tank is connected with the circulating water tank, and the other end of the water replenishing tank is connected with a water inlet for entering circulating water;
the circulating water tank is provided with a second sewage draining outlet for draining circulating water.
And water quantity measuring instruments are arranged at the water inlet and the water outlet of the water inlet and the second sewage draining outlet.
The medicament feeding device is provided with a medicament metering instrument.
Example 2
In order to realize the aim, the invention provides a technological route for optimizing the economic zero-emission treatment process of the waste water of the thermal power plant by cascade utilization, and adopts a circulating water system pollution discharge reduction technology, circulating water pollution discharge pretreatment, a circulating water pollution discharge advanced treatment and recycling system and a terminal waste water rotational flow atomization evaporation and solidification treatment system, so that the circulating water concentration rate is improved, the circulating water pollution discharge amount is reduced, and the economic zero-emission of the waste water is realized.
Establishing a circulating water digital online monitoring system to realize that data of each link of system operation is visible in real time; a novel water treatment agent adding system is additionally arranged, so that the concentration multiple is improved, and the discharge capacity of circulating water is reduced; a circulating water digital online control system is additionally arranged, so that the sewage discharge amount is finely controlled; the restriction of corrosive water on the operation of high concentration multiple is solved, and the metal corrosion can be controlled under the water quality conditions of low pH value, high chloride ion and high sulfate radical.
The process flow adopted by the pretreatment of the circulating water is as follows: circulating water sewage → circulating water machine add the pond → become the hole filter → activated carbon filter → hyperfiltration → fluidized bed removes hardness, utilizes current machine to add the pond and become the hole filter and carry out the preliminary step and fall hard, fall turbid, fall COD, newly increases activated carbon filter, hyperfiltration and fluidized bed and removes hard device and remove chlorine residue, turbidity, microorganism once more, reduces COD and hardness, satisfies the requirement of reverse osmosis intaking.
The process flow adopted by the deep recycling and evaporative curing of the circulating water and sewage comprises the following steps: circulating water pretreatment → a reverse osmosis device → a concentrated water reverse osmosis device → a rotational flow atomization flue for evaporation and solidification, wherein the water produced by the reverse osmosis device and the concentrated water reverse osmosis device is recycled to a boiler feed water ultrafiltration water tank, and the concentrated water is sent to the rotational flow atomization flue for evaporation and solidification, so that economic and zero discharge of wastewater is realized.
In order to overcome the defects of the prior art, the invention optimizes the waste water treatment process of the thermal power plant by cascade utilization to realize economic zero discharge.
In order to achieve the purposes, the invention adopts the technical scheme that a novel water treatment agent is adopted, a digital management technology is assisted, the concentration rate of circulating water is improved, water-saving and quantity-reducing treatment of circulating water sewage is realized, a subsequent circulating water concentration recycling treatment process is optimized, and the purposes of automatic management and economic zero discharge of wastewater are finally achieved.
Because the invention adopts the technical scheme, the invention has the advantages that:
establishing a circulating water digital online monitoring system to realize that data of each link of system operation is visible in real time; a novel water treatment agent adding system is additionally arranged, so that the concentration multiple can be obviously improved, and the circulating water discharge capacity is reduced; and a circulating water digital online control system is additionally arranged, so that the sewage discharge amount is finely controlled, and the investment and the operating cost of a wastewater zero discharge project are reduced.
Circulating water is treated by a novel water treatment agent and a digital management technology, enters an activated carbon, a super filter and a fluidized bed for hardness removal, enters a mature membrane concentration combined treatment unit of a solid-liquid separation membrane system and RO reverse osmosis, is collected to an ultrafiltration water tank, and is pumped to a boiler feedwater position; the concentrated wastewater enters a rotational flow atomization flue evaporation and solidification treatment unit, so that economic and zero discharge of the wastewater is realized.
The innovative technical scheme can also realize management standardization, decision intellectualization and environment friendliness of a whole plant water system, and has important significance for realizing waste water economy zero emission and intelligent water management of a thermal power plant in the power industry.
With reference to fig. 1, the digital pollution discharge reduction technology of the circulating water system establishes an online sensing system of the whole operation process of the circulating cooling water system, and comprises the following steps: industrial water quality monitoring, circulating water quality monitoring, water quantity and dosage metering, liquid level monitoring, meteorological monitoring, heat exchange equipment monitoring, cooling tower monitoring, circulating water pump monitoring and the like; secondly, setting an optimal concentration ratio operation range by monitoring parameters such as fouling thermal resistance, heat transfer coefficient, corrosion rate, concentration ratio, dosing concentration and the like on line, and automatically controlling a blowdown electric valve on line to ensure that the concentration ratio is stably controlled; finally, all monitored analog signals in the running process of the circulating cooling water system are converted into digital signals, and a communication mode is selected according to relevant provisions of the power plant by establishing a network layer; and finally, establishing a required digital model by using the data, converting the digital model into binary codes, introducing a computer to perform unified processing, gradually developing and perfecting an application layer system along with the accumulation of running data, and realizing the digital online monitoring and control of the circulating water system. Circulating water is treated by a novel water treatment agent, and is managed and controlled by a digital technology, so that the concentration rate can be obviously improved, and the discharge capacity of the circulating water is reduced.
With reference to fig. 2, the technical route of the scheme of the circulating sewage advanced treatment and recycling system is as follows: circulating sewage → a water circulating machine adding pool → a pore-changing filter → an activated carbon filter → super filtration → hardness removal of a fluid bed → a reverse osmosis device → a concentrated water reverse osmosis device → a rotational flow atomization flue for evaporation and solidification. The existing mechanical adding pool and the variable air gap filter are utilized to carry out initial hardness reduction, turbidity reduction and COD reduction; the newly added activated carbon filter, the super filter and the fluidized bed hardness removal device remove residual chlorine, turbidity and microorganisms again, reduce COD and hardness and meet the requirement of reverse osmosis water inflow. After the hardness of the fluidized bed is reduced, the effluent is treated by adding a reverse osmosis device and a concentrated water reverse osmosis device, the product water is recycled to an ultrafiltration water tank of a boiler water supply system, and the ultra-concentrated water is evaporated and solidified through a rotational flow atomization flue.
To sum up, the circulating water is handled through novel water treatment medicament, is aided with digital technical management control, is showing and is improving concentrated multiplying power, reduces the circulating water discharge capacity, and the waste water economy zero release of thermal power plant is realized through circulating sewage degree of depth retrieval and utilization processing and whirl atomizing flue evaporation solidification processing again.
Example 3
Based on the same invention concept, the invention also provides a circulating water digital online monitoring control method, which comprises the following steps:
circulating water is treated by a circulating water tank for feeding the medicament by a medicament control device;
enters the heat exchanger through the circulating pipeline for heat exchange, flows into the cooling tower for cooling and returns to the circulating water tank.
The circulating water is handled the back through the circulation tank that the medicament was put in to the medicament delivery device, includes:
the medicament control device monitors the water quality of the circulating water through a water quality monitoring instrument;
the medicament control device controls the medicament feeding device to feed the medicament to the circulating water tank according to the water quality condition monitored by the water quality monitoring instrument, and circulating water is treated.
The medicament controlling means is according to quality of water, and control medicament input device puts in the medicament to circulating water tank, handles the circulating water, includes:
the water inflow and the water discharge determined by the water quantity measuring instrument, and the dosage of the medicament determined by the medicament measuring instrument and the concentration ratio of the circulating water are used for treating the circulating water.
Get into the heat exchanger through the circulating line and carry out the heat exchange after, flow into after the cooling tower cooling returns circulation tank, still include:
treating the treated circulating sewage through a permeation device and a reverse osmosis device to obtain product water and super-concentrated water;
the product water passes through an ultrafiltration water tank and is used as boiler make-up water;
the super-concentrated water is evaporated by using a rotational flow atomization flue, so that zero discharge of wastewater is realized.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The present invention is not limited to the above embodiments, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are included in the scope of the claims of the present invention which are filed as the application.
Claims (10)
1. The utility model provides a digital on-line monitoring controlling means of circulating water which characterized in that includes: the device comprises a medicament control device, a circulating water tank, a cooling tower, a circulating pipeline and a heat exchanger;
the circulating water tank is communicated with the cooling tower, the circulating water tank is connected with the heat exchanger through a circulating pipeline, and the medicament control device is connected with the circulating water tank and used for feeding medicaments into the circulating water tank;
circulating water is treated in the circulating water tank, enters the heat exchanger through a circulating pipeline for heat exchange, flows into the cooling tower for cooling and returns to the circulating water tank.
2. The apparatus of claim 1, wherein the medicament control device comprises a device controller, a medicament delivery device, and a water quality monitoring instrument;
the equipment controller is in communication connection with the medicament feeding device and the water quality monitoring instrument;
the medicament feeding device is connected with the circulating water tank and used for feeding medicaments, and the water quality monitoring instrument is arranged at the outlet of the circulating water tank and used for monitoring water quality.
3. The apparatus of claim 1, wherein there are two circulation pipes, each of which is provided with a circulation pump, and the heat exchanger is provided with a first drain port for draining water.
4. The apparatus of claim 1, further comprising a makeup tank connected at one end to the circulation tank and at another end to a water inlet into which the circulating water enters;
the circulating water tank is provided with a second sewage draining outlet for draining circulating water.
5. The apparatus of claim 4, wherein water quantity meters are arranged at the water inlet and the water outlet of the water inlet and the second sewage draining outlet.
6. The device of claim 2, wherein the medicament delivery device is provided with a dose meter.
7. A circulating water digital online monitoring control method is characterized by comprising the following steps:
circulating water is treated by a circulating water tank for feeding the medicament by a medicament control device;
and the heat exchange liquid enters the heat exchanger through a circulating pipeline for heat exchange, flows into the cooling tower for cooling and then returns to the circulating water tank.
8. The method of claim 7, wherein said circulating water after being treated by a circulating tank of a medicament delivery device for delivering medicament comprises:
the medicament control device monitors the water quality of the circulating water through a water quality monitoring instrument;
the medicament control device controls the medicament feeding device to feed the medicament to the circulating water tank according to the water quality condition monitored by the water quality monitoring instrument, and circulating water is treated.
9. The method of claim 8, wherein the agent control device controls the agent administration device to administer the agent to the circulating water tank according to the water quality, and the treatment of the circulating water comprises:
the water inflow and the water discharge determined by the water quantity measuring instrument, and the dosage of the medicament determined by the medicament measuring instrument and the concentration ratio of the circulating water are used for treating the circulating water.
10. The method of claim 9, wherein after entering the heat exchanger through the circulation pipeline for heat exchange and flowing into the cooling tower for cooling and returning to the circulation water tank, the method further comprises:
treating the treated circulating sewage through a permeation device and a reverse osmosis device to obtain product water and super-concentrated water;
the product water passes through an ultrafiltration water tank and is used as boiler make-up water;
and evaporating the super-concentrated water by using a rotational flow atomization flue, thereby realizing zero discharge of wastewater.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011275861.2A CN112415965A (en) | 2020-11-16 | 2020-11-16 | Circulating water digital online monitoring control device and method |
| PCT/CN2021/124764 WO2022100383A1 (en) | 2020-11-16 | 2021-10-19 | Apparatus and method for digital online monitoring and control of circulating water |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011275861.2A CN112415965A (en) | 2020-11-16 | 2020-11-16 | Circulating water digital online monitoring control device and method |
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| CN112415965A true CN112415965A (en) | 2021-02-26 |
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| WO (1) | WO2022100383A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022100383A1 (en) * | 2020-11-16 | 2022-05-19 | 华能碳资产经营有限公司 | Apparatus and method for digital online monitoring and control of circulating water |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115771921A (en) * | 2022-12-19 | 2023-03-10 | 北京新世翼节能环保科技股份有限公司 | Fluoroplastic flue gas waste heat utilization circulating water quality adjusting system and control method |
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| WO2022100383A1 (en) | 2022-05-19 |
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