CN104529014A - Circulating water treatment method and system - Google Patents
Circulating water treatment method and system Download PDFInfo
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- CN104529014A CN104529014A CN201510024316.9A CN201510024316A CN104529014A CN 104529014 A CN104529014 A CN 104529014A CN 201510024316 A CN201510024316 A CN 201510024316A CN 104529014 A CN104529014 A CN 104529014A
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- water
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/02—Non-contaminated water, e.g. for industrial water supply
- C02F2103/023—Water in cooling circuits
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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
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
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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
- C02F2209/05—Conductivity or salinity
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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
- C02F2209/18—PO4-P
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention relates to a circulating water treatment method and system. The method comprises the following steps: performing filtration treatment on circulating water, meanwhile, sampling the circulating water, and performing water quality detection and operation working condition detection on the sampled circulating water to obtain an electric conductivity value and an ORP (oxidation-reduction potential) index value of the circulating water and calculate a stability index; and adding a chemical agent into a circulating water system according to the obtained ORP index value and the stability index and starting forced drainage when the measured electric conductivity value is too high. The system comprises a circulating water pipe and a physical treatment device, a sampling device and a chemical treatment device which are arranged on the circulating water pipe, wherein the sampling device is further connected with a water quality and working condition monitoring and control device, and the water quality and working condition monitoring and control device is used for controlling the operation of the physical treatment device and the chemical treatment device. According to the method provided by the invention, the organic combination of the physical filtration treatment way and the chemical treatment way of putting the chemical agent is adopted, and the dynamic water quality treatment of the circulating water is realized.
Description
Technical field
The present invention relates to water conditioning technical field, particularly relate to a kind of circulating water treatment method and system.
Background technology
Circulating water system refers to using water as thermal exchange carrier carries out to medium the water circulation system of object of conducting heat to reach, and is widely used in the freezing and heating air-conditioner system of industrial cooling.Recirculated water is in operational process, along with the difference in Electrode Potential of system temperature, flow velocity and metal material and ambient atmosphere environment interact, the materials such as the salts substances in water, solid substance impurity, bacterium and dissolved gas can cause the problem such as fouling, burn into bacterium algae of all kinds of interchanger in circulating water system, scatterer and various pipes valve, thus reduction rate of heat exchange, etching apparatus, jeopardizes production and living safety.
The core of circulating water treatment technology is come fouling resistance value, the erosion rate of Controlling System, the breeding of bacterium and suspended substance, improve system cloud gray model cycles of concentration, reduce system water supplement amount and blowdown flow rate, and then reduce the treatment operating costs of system, shorten and invest return period, reach the target of energy-saving and emission-reduction and guarantee public health security.China all proposes related request at " Code for design of building water supply and sewerage " (GB50015-2003), " heating and ventilation and In Air Conditioning Design specification " (GB50019-2003), " public building energy standard " (GB50189-2005), " heating and air-conditioning system water quality " (GB/T29044-2012) and " Code for design of industrial recirculating cooling water treatment " (GB50050-2007) etc. for circulating water treatment.
China's recirculated water water technology continues there is the history of decades from being introduced into be developed so far abroad, and current main process is Physical, chemical method and physico-chemical process.These three kinds for the treatment of process are all the operation water quality and the operation condition that first suppose system, reset water treating equipment running performance parameters, as physical field frequency power parameter or throw in chemical water quality treating chemicals at regular time and quantity, belong to static passive treatment.But recirculated water is in operational process; water quality is among dynamic change; when operation water quality exceeds the condition of water quality of water treating equipment adaptation; then the reduction of water treating equipment effect was even lost efficacy; thus cause the operation condition of circulating water system operation condition well beyond design; energy consumption and water consumption increase fast, and serious need are regularly shut down heat exchanging equipment and carried out physics or matting.
As can be seen here, above-mentioned existing circulating water treatment method and system are in method with in use, and dynamic working condition of water quality, with in static water conditioning, obviously still has inconvenience and defect, and is urgently further improved.How to found a kind of new circulating water treatment method and method, one of current important research and development problem of real genus.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of circulating water treatment method, make it by the combination of physical treatment mode, chemical treatments, water quality Real-Time Monitoring, operation condition Real-Time Monitoring and full automatic control, realize the dynamic bind that recirculated water runs water quality, operation condition and circulating water quality process, thus overcome the deficiencies in the prior art.
For solving the problems of the technologies described above, a kind of circulating water treatment method of the present invention, comprise the following steps: A, filtration treatment is carried out to recirculated water, recirculated water is sampled simultaneously, water quality detection and operation condition detection are carried out to the recirculated water of sampling, draw conductivity value and the ORP desired value of recirculated water, and calculation stability index; The ORP desired value that B, basis obtain and index of stability throw in chemical agent in circulating water system, and start forced drainage when the conductivity value recorded is too high.
As a modification of the present invention, described step B, be specially according to water quality requirement setting index of stability threshold values a and b, ORP index threshold values c and d, specific conductivity threshold values e and f, wherein a<b, c<d, e < f: when the index of stability obtained is less than a, throw in Scale inhibitors until index of stability is more than or equal to a in circulating water system; When the index of stability obtained is greater than b, in circulating water system, throw in inhibiter until index of stability is less than or equal to b; When the ORP desired value obtained is less than or equal to c, in circulating water system, throw in sterilant until the ORP index recorded is more than or equal to d; When the conductivity value obtained is greater than f, start forced drainage until the conductivity value recorded is less than e.
Also comprise and the inlet outlet pressure differential of filtration unit is detected, and the filtration unit flushing pollution discharge step of carrying out when pressure reduction is excessive.
Described sampling samples without the recirculated water filtered.
In addition, present invention also offers a kind of circular water treating system applying aforesaid method, it is made to make it by the combination of physical treatment mode, chemical treatments, water quality Real-Time Monitoring, operation condition Real-Time Monitoring and full automatic control, realize the real-time detection that recirculated water runs water quality and operation condition, thus overcome the deficiencies in the prior art.
For solving the problems of the technologies described above, a kind of circular water treating system applying aforesaid method of the present invention comprises circulating pipe and is arranged on physical processing apparatus, sampling unit and the chemical processing device on circulating pipe, described sampling unit is also connected with water quality and monitoring of working condition and control device, and described water quality and monitoring of working condition and control device control the operation of described physical processing apparatus and chemical processing device.
As further improvement, described circulating pipe comprises the water-supply pipe be connected with the water inlet of physical processing apparatus, and the return water pipe to be connected with the water outlet of physical processing apparatus, described sampling unit is arranged on described water-supply pipe, and described chemical processing device is arranged on described return water pipe.
Described physical processing apparatus adopts accurate filter, has single filter element or many filter elements structure, and its flow passage components adopt metal or plastic corrosion-resisting material to make.
Described sampling unit is provided with forced drainage valve, and described water quality and monitoring of working condition and control device control the action of described forced drainage valve.
Described chemical processing device is one or more combinations in Scale inhibitors chemicals dosing plant, inhibiter chemicals dosing plant, sterilant chemicals dosing plant, and each chemicals dosing plant includes medicine storing drum, the dosing pump be connected with medicine storing drum and connects the chemical feed pipe of dosing pump and circulating pipe.
Described water quality and monitoring of working condition and control device comprise pH value measuring instrument, electric conductivity detector table, ORP measuring instrument, temperature instrument, index of stability computing judge module and control module.
After adopting such design, the present invention at least has the following advantages:
1, the present invention can realize the Dynamic Matching that water treating equipment operational conditions and recirculated water run water quality, operation condition;
2, the present invention can instruct the input of inhibiter and Scale inhibitors, pH regulator medicament according to index of stability, runs the input that ORP water-quality guideline item instructs sterilant, can reduce more than 50% of medicament delivery amount, reduce running cost according to recirculated water;
3, dynamic active recirculated water chemistry water quality treating processes of the present invention, can improve circulating water treatment effect, realize circulating water system energy-saving and water-saving Effec-tive Function;
4, accurate filter of the present invention adopts positive displacement runner to control to retain work principle of filter, and flow passage components adopt the corrosion-resistant material such as metal or plastics to make, solve the problem that traditional strainer filtering precision low backwash water displacement is large, also solve conventional quartz sand or Fiber Materials media filtration filtering velocity is low, floor space is large, and need the complex operations problems such as back-washing equipment be configured;
5, Physical secondary filter equipment of the present invention can realize filtering recirculated water when backwash blowdown simultaneously, and solving traditional treatment method can not the difficult problem of continuous filtration, and many filter elements frame mode reduces water amount of blowdown greatly, realizes water saving and runs.
Accompanying drawing explanation
Above-mentioned is only the general introduction of technical solution of the present invention, and in order to better understand technique means of the present invention, below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail.
Fig. 1 is the composition schematic diagram of a kind of circular water treating system of the present invention.
Embodiment
A kind of circulating water treatment method of the present invention, comprising: carry out filtration treatment to recirculated water, simultaneously to recirculated water sampling, carries out water quality detection and operation condition detection, draw conductivity value and the ORP desired value of recirculated water to the recirculated water of sampling, and calculation stability index; In circulating water system, throw in chemical agent according to the ORP desired value obtained and index of stability afterwards, and start forced drainage when the conductivity value recorded is too high.
Further specifically, according to application system setting index of stability threshold values a and b, ORP index threshold values c and d, and specific conductivity threshold values e and f, wherein a<b, c<d, e < f: when the index of stability obtained is less than a, throw in Scale inhibitors until index of stability is more than or equal to a in circulating water system; When the index of stability obtained is greater than b, in circulating water system, throw in inhibiter until index of stability is less than or equal to b; When the ORP desired value obtained is less than or equal to c, in circulating water system, throw in sterilization algae removal bactericide specially until the ORP index recorded is more than or equal to d; When the conductivity value obtained is greater than f, start forced drainage until the conductivity value recorded is less than e.
The cycles of concentration that the present invention is run by the forced drainage controlled circulation water coolant started according to specific conductivity, controlled to throw in Scale inhibitors in trend recirculated water by water quality and working condition control device, inhibiter, the special chemical agent such as sterilant, thus the antiscale of hardness dirt is realized to recirculated water, suppress the functions such as corrosion and killing microorganisms, can Real-time and Dynamic be active carries out water conditioning to recirculated water, solve current Physical, chemical method or the static passive treatment of physico-chemical process treatment process, the problems such as the reduction of circulating water treatment device usefulness or inefficacy are caused because of recirculated water operation water quality and working conditions change.
In addition, because recirculated water is in operational process, circulating water quality is among dynamic change, adopts treatment method can realize the Dynamic Matching of recirculated water operation water quality and medicament delivery, greatly reduces medicament delivery amount, reduce running cost.Recirculated water is filtered, antiscale, anticorrosion, sterilization, control cycles of concentration, simultaneously for circulating water quality process provides reliably stability, realize the operation of saving water and energy of circulating water system.
Refer to shown in Fig. 1, present invention also offers the circular water treating system of application aforesaid method, comprise circulating pipe, physical processing apparatus, sampling unit, chemical processing device and water quality and monitoring of working condition and control device.Circular water treating system of the present invention is connected to circulating water system by circulating pipe in by-pass flow mode, physical processing apparatus, sampling unit and chemical processing device are all arranged on circulating pipe, water quality is connected with sampling unit with control device with monitoring of working condition, and controls the operation of physical processing apparatus and chemical processing device.
Further specifically, physical processing apparatus of the present invention is made up of accurate filter, accurate filter can adopt single filter element structure, more preferably many filter elements structure, its flow passage components adopt the corrosion-resistant material such as metal or plastics to make, and have employed positive displacement runner and control to retain work principle of filter, be connected to circulating pipe online by the mode of by-pass flow, the solid substance impurity in recirculated water and suspended substance can be removed, avoid the formation of dirt.
Circulating pipe comprises the water-supply pipe be connected with the water inlet of physical processing apparatus, and the return water pipe be connected with the water outlet of physical processing apparatus.Namely sampling unit is arranged on water-supply pipe, and chemical processing device is then arranged on return water pipe.
With further, sampling unit of the present invention is also provided with forced drainage valve, and water quality and monitoring of working condition and control device control the action of described forced drainage valve, with the cycles of concentration of automatic recycling water formulation according to the circulation electrical conductivity of water be sampled to.
Chemical processing device of the present invention generally includes the combination of Scale inhibitors chemicals dosing plant, inhibiter chemicals dosing plant and sterilant chemicals dosing plant as shown in the figure, also can select according to the feature of application system and water quality or coordinate other device to be suitable for, each chemicals dosing plant includes medicine storing drum, dosing pump, chemical feed pipe, described chemical feed pipe one end is connected with medicine storing drum by dosing pump, and the other end is connected to return water pipe.
Water quality and monitoring of working condition and control device uses water quality detection instrument, operation condition measuring instrument detects the water quality and operating mode that sample recirculated water in real time, and automatically computation cycles water index of stability and control the operation of physical processing apparatus and chemical processing device.Wherein, water quality detection instrument has pH value, specific conductivity and ORP (redox potential) measuring instrument, and operation condition measuring instrument uses temperature instrument, and built-in index of stability unit calculates judge module and controls control module.
System of the present invention can realize display and remote transmission in real time to circulating water quality, operation condition, realizes intelligent fully automatic operation.
Below the example that is applied as with central air conditioning Open recirling cooling water system is described in further detail this patent.
Certain central air conditioning Open recirling cooling water system, water capacity is 50m
3, supply and return water temperature is 32 DEG C ~ 37 DEG C, moisturizing specific conductivity 350uS/cm, and moisturizing hardness is 80mg/l, and running and controlling cycles of concentration is 5.
Recirculated water, at run duration, adopts Physical accurate filter to carry out side stream type filtration to recirculated water, when strainer inlet outlet pressure differential reaches the 3mH of supposition
2o, strainer filtering unit of starting by sequence carries out flushing pollution discharge, other filtering unit normal filtration.When pressure reduction reaches the 2mH of supposition
2o, then flushing pollution discharge unit proceeds to filtration running status automatically.
Recirculated water is at run duration, and recirculated water is introduced water quality and operation condition proofing unit by stopple coupon, and the detected value of pH value, specific conductivity, temperature, ORP index is transferred to water quality and operation condition control device by water quality and operation condition proofing unit.
The embedded software of water quality and operation condition control device according to the water quality of monitoring and temperature, the index of stability of automatic computation cycles water.When index of stability is between 6.0-7.0, automatically stop the medicament delivery of chemicals dosing plant Scale inhibitors and inhibiter.When index of stability is less than 6.0, now, recirculated water is in fouling tendency, automatically opens the medicament delivery of chemicals dosing plant Scale inhibitors, when index of stability is more than or equal to 6.0, automatically stops the medicament delivery of chemicals dosing plant Scale inhibitors.When index of stability is greater than 7.0, now, recirculated water is in corrosion tendency, automatically opens the medicament delivery of chemicals dosing plant inhibiter, when index of stability is less than or equal to 7.0, automatically stops the medicament delivery of chemicals dosing plant inhibiter.
When ORP index is more than or equal to 550mV, automatically stop the medicament delivery of chemicals dosing plant sterilant, when ORP index is less than or equal to 450mV, automatically open the medicament delivery of chemicals dosing plant sterilant.
When the specific conductivity detected is greater than 1750uS/cm, the forced drainage valve on enforced opening stopple coupon, when the specific conductivity detected is less than 1400uS/cm, close the forced drainage valve on stopple coupon.
The above; it is only preferred embodiment of the present invention; not do any pro forma restriction to the present invention, those skilled in the art utilize the technology contents of above-mentioned announcement to make a little simple modification, equivalent variations or modification, all drop in protection scope of the present invention.
Claims (10)
1. a circulating water treatment method, is characterized in that comprising the following steps:
A, filtration treatment is carried out to recirculated water, simultaneously to recirculated water sampling, water quality detection is carried out to the recirculated water of sampling and operation condition detects, draw conductivity value and the ORP desired value of recirculated water, and calculation stability index;
The ORP desired value that B, basis obtain and index of stability throw in chemical agent in circulating water system, and start forced drainage when the conductivity value recorded is too high.
2. a kind of circulating water treatment method according to claim 1, it is characterized in that described step B, be specially according to water quality requirement setting index of stability threshold values a and b, ORP index threshold values c and d, specific conductivity threshold values e and f, wherein a<b, c<d, e < f:
When the index of stability obtained is less than a, in circulating water system, throw in Scale inhibitors until index of stability is more than or equal to a;
When the index of stability obtained is greater than b, in circulating water system, throw in inhibiter until index of stability is less than or equal to b;
When the ORP desired value obtained is less than or equal to c, in circulating water system, throw in sterilant until the ORP index recorded is more than or equal to d;
When the conductivity value obtained is greater than f, start forced drainage until the conductivity value recorded is less than e.
3. a kind of circulating water treatment method according to claim 1, characterized by further comprising and detect the inlet outlet pressure differential of filtration unit, and the filtration unit flushing pollution discharge step of carrying out when pressure reduction is excessive.
4. a kind of circulating water treatment method according to claim 1, is characterized in that described sampling samples without the recirculated water filtered.
5. the circular water treating system of method described in an application rights requirement 1-4, it is characterized in that the physical processing apparatus, sampling unit and the chemical processing device that comprise circulating pipe and be arranged on circulating pipe, described sampling unit is also connected with water quality and monitoring of working condition and control device, and described water quality and monitoring of working condition and control device control the operation of described physical processing apparatus and chemical processing device.
6. a kind of circular water treating system according to claim 5, it is characterized in that described circulating pipe comprises the water-supply pipe be connected with the water inlet of physical processing apparatus, and the return water pipe to be connected with the water outlet of physical processing apparatus, described sampling unit is arranged on described water-supply pipe, and described chemical processing device is arranged on described return water pipe.
7. a kind of circular water treating system according to claim 5, is characterized in that described physical processing apparatus adopts accurate filter, has single filter element or many filter elements structure, and its flow passage components adopt metal or plastic corrosion-resisting material to make.
8. a kind of circular water treating system according to claim 5, is characterized in that described sampling unit is provided with forced drainage valve, and described water quality and monitoring of working condition and control device control the action of described forced drainage valve.
9. a kind of circular water treating system according to claim 5, it is characterized in that described chemical processing device is one or more combinations in Scale inhibitors chemicals dosing plant, inhibiter chemicals dosing plant, sterilant chemicals dosing plant, each chemicals dosing plant includes medicine storing drum, the dosing pump be connected with medicine storing drum and connects the chemical feed pipe of dosing pump and circulating pipe.
10. a kind of circular water treating system according to claim 5, is characterized in that described water quality and monitoring of working condition and control device comprise pH value measuring instrument, electric conductivity detector table, ORP measuring instrument, temperature instrument, index of stability computing judge module and control module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510024316.9A CN104529014A (en) | 2015-01-16 | 2015-01-16 | Circulating water treatment method and system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510024316.9A CN104529014A (en) | 2015-01-16 | 2015-01-16 | Circulating water treatment method and system |
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| CN104529014A true CN104529014A (en) | 2015-04-22 |
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| CN201510024316.9A Pending CN104529014A (en) | 2015-01-16 | 2015-01-16 | Circulating water treatment method and system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107746117A (en) * | 2017-11-28 | 2018-03-02 | 大连理工大学 | A kind of electrochemistry water stabilization and purification method and device |
| CN111003838A (en) * | 2019-11-27 | 2020-04-14 | 上海中船三井造船柴油机有限公司 | Automatic water quality monitoring and dosing system for diesel engine circulating cooling water |
| CN113536698A (en) * | 2021-09-16 | 2021-10-22 | 大唐环境产业集团股份有限公司 | Method and device for establishing circulating water dosing model of thermal power plant |
| CN114315004A (en) * | 2022-01-28 | 2022-04-12 | 中国铁路设计集团有限公司 | Circulating water purification and conveying integrated device of assembly type air-conditioning water system and operation method of circulating water purification and conveying integrated device |
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| US5895565A (en) * | 1996-10-04 | 1999-04-20 | Santa Barbara Control Systems | Integrated water treatment control system with probe failure detection |
| CN2853769Y (en) * | 2005-12-01 | 2007-01-03 | 曹青林 | Pysicochemical treatment device for circulation water |
| CN201842702U (en) * | 2010-10-15 | 2011-05-25 | 廖宝 | Full-automatic intelligent circulating water treatment device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5895565A (en) * | 1996-10-04 | 1999-04-20 | Santa Barbara Control Systems | Integrated water treatment control system with probe failure detection |
| CN2853769Y (en) * | 2005-12-01 | 2007-01-03 | 曹青林 | Pysicochemical treatment device for circulation water |
| CN201842702U (en) * | 2010-10-15 | 2011-05-25 | 廖宝 | Full-automatic intelligent circulating water treatment device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107746117A (en) * | 2017-11-28 | 2018-03-02 | 大连理工大学 | A kind of electrochemistry water stabilization and purification method and device |
| CN107746117B (en) * | 2017-11-28 | 2021-04-20 | 大连理工大学 | Electrochemical water quality stabilizing and purifying method and device |
| CN111003838A (en) * | 2019-11-27 | 2020-04-14 | 上海中船三井造船柴油机有限公司 | Automatic water quality monitoring and dosing system for diesel engine circulating cooling water |
| CN113536698A (en) * | 2021-09-16 | 2021-10-22 | 大唐环境产业集团股份有限公司 | Method and device for establishing circulating water dosing model of thermal power plant |
| CN113536698B (en) * | 2021-09-16 | 2022-01-25 | 大唐环境产业集团股份有限公司 | Method and device for establishing circulating water dosing model of thermal power plant |
| CN114315004A (en) * | 2022-01-28 | 2022-04-12 | 中国铁路设计集团有限公司 | Circulating water purification and conveying integrated device of assembly type air-conditioning water system and operation method of circulating water purification and conveying integrated device |
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Application publication date: 20150422 |