CN100545105C - The autocontrol method for the treatment of cooling circulation water system by ozone - Google Patents
The autocontrol method for the treatment of cooling circulation water system by ozone Download PDFInfo
- Publication number
- CN100545105C CN100545105C CN 200710041041 CN200710041041A CN100545105C CN 100545105 C CN100545105 C CN 100545105C CN 200710041041 CN200710041041 CN 200710041041 CN 200710041041 A CN200710041041 A CN 200710041041A CN 100545105 C CN100545105 C CN 100545105C
- Authority
- CN
- China
- Prior art keywords
- water
- ozone
- cooling
- autocontrol method
- real
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The present invention discloses a kind of autocontrol method for the treatment of cooling circulation water system by ozone, by detecting fouling resistance, corrosion rate and the microbiological indicator of the recirculated water in the cooling circulating water system, and with the contrast of the multiparameter database that presets, judging that the residing state of recirculated water is corrosion or fouling tendency, so that the automatic operational order of implementation system dynamically.Wherein, according to the front discharging of the judgement commander cooling circulating water of the state of water and the pump valve of make up water are operated.Moreover, to the discharging of the judgement of the state of water and water with replenish, regulate the ozone generating capacity according to the front in real time.The present invention can realize the automatization of water quality detection control, makes the comprehensive conformance with standard of circulating water quality, increases the treating water cycle index.
Description
Technical field
The present invention relates to a kind of automatization water treatment method, relate in particular to a kind of autocontrol method for the treatment of cooling circulation water system by ozone.
Background technology
Fouling, corrosion phenomenon are to use modal problem in the heat exchanging apparatus system of recirculated cooling water, with the operation of harm equipment.The continuous in the course of the work vaporize water of open cooling tower is taken away heat, the many materials that exist in the water are concentrated, and constantly bring in the water polluting composition, dust, microorganism etc. in the atmosphere, if can not control the water quality of recirculated cooling water well, just can make heat exchanging apparatus (all kinds of refrigerators very soon, air compressor machine etc.) task performance reduces, pipeline obstruction, energy consumption increases considerably, and also can cause equipment corrosion, reduction of service life, cause very large economy loss.Because suitable water temperature is grown a large amount of bacteriums, particularly produce pathogenic bacterium (as legionella pneumophilia) public health is caused very big threat simultaneously.
Usually adopt chemical method and physics method to alleviate the above problem of recirculated cooling water at present.Chemical-agent technique adopts many different reagent and the complexing of water intermediate ion to alleviate fouling, regulate potential of hydrogen and prevent corrosion, with the sterilant sterilization, because these medicaments are influential mutually, the fouling tendency of water and corrosion tendency are again conflicting, therefore the water that promptly tends to fouling is not inclined to corrosion usually, and vice versa, regulates fouling tendency respectively and corrosion tendency is difficult to have concurrently two kinds of regulating effects.And the composition of water coolant but is to change at any time, and it changes and constantly changing with the composition of working condition, weather, make up water.And the regular dosing that chemical-agent technique adopts, be actually through after a while (as weekly or every month once) fouling or the corrosion tendency that take place in the correction water with lagging.Moreover medical method is handled practice and is upward come the electricity of Control Circulation water coolant to lead by discharging, and electricity is led to bring up to and to a certain degree carried out discharging.Lead high the time so replenish water power, the with medicament method is very difficult.In addition, the with medicament method can not very effective sterilization, and can develop immunity to drugs and lost efficacy, and needs in time to change.That medical method uses is phosphorous in a large number, zinc, chlorine, a class material of nitrogen, even during discharging in the water concentration up to standard, but require from the overall control of polluting, becoming a ton ground medicament to discharge year in year out obviously is that environment water is constituted very important harm.
Based on the problems referred to above, it is conspicuous adopting chemical-agent technique to come the defective of cycle of treatment water.
Aspect automatic control, existing at present dosing method adopts the mode of automatic monitoring system, and its monitor mode mainly is the chemical ingredients with water, as: calcium, magnesium, total alkali, chlorine equal size and potential of hydrogen (PH) and electric conductivity value are controlled the discharging of water with additional.But these data just judge that by indirect index the fouling of water or corrosion tendency implement control, and these indexs may not necessarily accurately reflect the water quality of water comprehensively.
Physical method is mainly used in scale inhibition, and it is to use in the magnetic field penetration water, makes the ion that forms dirt be in the state that surrounded by water molecules, is separated into little crystallization, is difficult for forming dirt in equipment surface.But find in the practical application water quality is had higher requirements, the de-sludging effect has limitation, and to corrosion and microorganism to kill validity not obvious.
Ozone method cycle of treatment water coolant is to begin to be tending towards sophisticated new technology over past ten years.By to injecting dissolved ozone in the recirculated water, in water, produce the very strong radicals such as OH of oxidisability, the microorganism in they and the water, chemical molecular reacts and reaches purification, sterilisation purpose.By suitable design, under the certain processing condition of control, the ozone method can substitute medical method and handle, and realizes effects such as scale inhibition, protection against corrosion, sterilization simultaneously.
Some basic experiences and result of study have been accumulated aspect the using ozone processing water coolant abroad since the nineties.The using ozone method has been proved to be and has been safety, effective, free of contamination cleaning technique in this field.Adopt the generating capacity of ORP (redox potential) control ozone in the practice, according to the electricity of water lead, indexs such as sodium, chlorine, calcium, magnesium and total alkalinity (POSI index, practical ozone scaling index) and bacterium, discharge and replenishment cycles water with manual operation.That is to say that at present the ozonize method does not enter the automatic control stage as yet, but rely on artificial regular measurement, take all factors into consideration a plurality of parameters after, carry out artificial discharging and replenishment cycles water.
The calculation formula of above-mentioned practical ozone scaling index POSI can allow to move under higher cycle index than chemical method.The POSI expression formula is as follows:
Wherein: Ca, Mg, ALK are respectively the calcium ion of representing with lime carbonate in the make up water, magnesium ion and total alkalinity (mg/litre); Cl, Na are respectively the concentration (mg/litre) of chlorine and sodium ion in the make up water; C0 is for replenishing electrical conductivity of water, and C1 is that recirculated water allows its maximum conductance value that reaches.C1/C0 is the cycles of concentration or the cycle index of recirculated water, and the utilization ratio of the high more expression water of this value is high more, and water-saving result is had a significant impact.On the other hand,, also can cause fouling, grow microorganism, form dirt and produce bacillary corrosion when the discharge water deficiency.
Yet C1 and C0 are possible on the low side with the cycle index that electric conductivity value calculates gained in the POSI formula, therefore control the circulation of water and discharge with this index often can't reach top efficiency.The someone advises that certain constituent concentration that exists in the water replaces specific conductivity to calculate C1/C0 for this reason, for example: can reach higher cycle index with sodium, total alkali, silicon isoconcentration, but be difficult to realize automatic monitoring in the actually operating, and inconvenient.So the POSI numerical value that following formula is expressed still has uncertainty.The more important thing is, change that seasonal variation and operating mode change all can directly have influence on determining of POSI value again because replenish water quality regular meeting in practice.For example to lead the amplitude of variation own very big for the electricity of this city tap water, cause the variation of the POSI value preset, and when using other source water to make make up water, also can not guarantee to have all the time stable electricity to lead and keep the constant of other compositions, therefore in these cases, only adopt the POSI that under stable case, calculates to weigh fouling tendency with unreliable.
In view of the above problems, designing the recirculated water index in a kind of comprehensive reflection ozonize recirculating cooling water system, and utilize these indexs to realize the method for the automatic control of recirculated cooling water, is the key that the ozonize method is promoted development.
Summary of the invention
Technical problem to be solved by this invention provides a kind of autocontrol method for the treatment of cooling circulation water system by ozone, it can detect various parameters in the cooling circulating water system, determine to reflect the direct indicator of water quality in view of the above, when some key index surpasses regulation, carry out ozone concn adjusting or discharging and make up water automatically.
The present invention solves the problems of the technologies described above the technical scheme that adopts to be: the autocontrol method that a kind for the treatment of cooling circulation water system by ozone is provided, utilize an automatic control system to carry out the detection control of cooling circulating water system, this cooling circulating water system comprises water collecting basin, a unit cooler and that flows to cooling tower after water collecting basin provides the cooling tower, of water coolant that water collecting basin is exported water cooling in order to inject the ozonizer of ozone, and wherein this water collecting basin bottom is provided with a bleed valve; This automatic control system has a real time data detecting unit, an analytical unit and a control device, this Data Detection unit comprises a plurality of transmitters of being located in the described cooling circulating water system, this control device has a database, stores microbiological indicator and the preset value of fouling resistance value and the preset range of ozone concn of water quality in the described database; Described autocontrol method may further comprise the steps.A. gather one group of real-time parameter automatically with described real time data detecting unit, wherein this group real-time parameter comprises the microbiological indicator of water quality at least, and can determine the fouling resistance value of water quality at least; B. the real-time parameter of being imported according to the real time data detecting unit with described analytical unit calculates described fouling resistance value; C. according to the microbiological indicator of measuring and the comparative result of the microbiological indicator preset value in the database, from database, determine a reference mark in the preset range of ozone concn and export described ozonizer to; D. the fouling resistance value of relatively calculating and the preset value of the fouling resistance value in the database, and when the fouling resistance value surpassed preset value, described control device was exported a control signal and is made described bleed valve draining.
In the above-mentioned autocontrol method, described microbiological indicator comprises slime content and/or total plate count.
In the above-mentioned autocontrol method, the calculation formula of described fouling resistance value R is:
Wherein A is the heat exchanger heat transfer area of described unit cooler, and T1/T2 is the import/export temperature of thermal medium, t1/t2 be cooling circulating water advance/go out temperature, G is the cooling water flow by heat exchanger, Cp is a specific heat of water.
In the above-mentioned autocontrol method, described real-time parameter also comprises the corrosion rate of cooling circulating water.
In the above-mentioned autocontrol method, described step a also comprises: receive outside one group of regular parameter importing with a data input cell, wherein can determine practical ozone scaling index POSI in conjunction with described real-time parameter and regular parameter; And described step b also comprises: according to described real-time parameter and the regular described ozone scaling index of calculation of parameter.
In the above-mentioned autocontrol method, after described step b, also comprise: show described real-time parameter and water-quality guideline with a system monitoring unit, and output control signal corresponding when unusual takes place in a certain parameter or index; And, make the warning of alarm unit output corresponding prompt according to the unitary control signal of system monitoring.
In the above-mentioned autocontrol method, described real-time parameter also comprises second redox potential of heat exchanger inlets of first redox potential, the unit cooler of ozone water decanting point, and described step c also comprises: as feedback signal, regulate the ozone generating capacity of described ozonizer with first redox potential and second redox potential.
In the above-mentioned autocontrol method, also comprise step e: utilize recoil suspended particle in the circulation line of described cooling circulating water system of a recoiling device, described step e further comprises: e1. provides a strainer, it is located at described water collecting basin and outputs on the pipeline of described unit cooler, and be connected with a recoil pump through a recoil valve, and described recoil pump connects a water source; E2. detect the import/export pressure difference of strainer with described real time data detecting unit, in described control device, the pressure difference preset value in described pressure difference and the described database is compared; And e3. is when described pressure difference surpasses described preset value, and described control device is exported a control signal to open recoil valve, makes the water in the described water source enter the dirt that washes away in the strainer wherein by recoil pump and recoil valve.
In the above-mentioned autocontrol method, the preset range of ozone concn is in the described database: the ozone water decanting point is 0.5～1.5ppm, and the heat exchanger inlets place of unit cooler is 0.02～0.08ppm.
The present inventor finds through practice, is the direct indicator that is used for weighing the fouling tendency of recirculated water with fouling resistance value R, can stablize and reflect accurately the fouling tendency of recirculated water.Fouling resistance value R is combined with the corrosion rate and the microbiological indicator of water, can be comprehensively and directly reflect the water quality of recirculated water, thus be provided for the accurate foundation of control automatically.Because adopt above technical scheme, the present invention can reach following beneficial effect at least:
1. by autocontrol method of the present invention, can monitor the fouling of ozonize recirculated cooling water in real time, three main directly water-quality guideline of corrosion and microorganism, keep the well balanced state of water quality under the conditions such as make up water of the operating mode of guarantee cooling circulating water earthquake, season, different sources, realize scale inhibition simultaneously, the clean conditions of protection against corrosion and low microorganism.
2. by the present invention, make ozonization cooling water circulation realize effectively Detection ﹠ Controling in real time, to improving the heat exchanger efficiency, reduce corrosion, improving service life of equipment has great important.
Description of drawings
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated, wherein:
Fig. 1 is the cooling circulating water system synoptic diagram that adopts autocontrol method of the present invention.
Fig. 2 is according to the designed automatic control system structured flowchart of the autocontrol method of one embodiment of the invention.
Fig. 3 is the schema of an embodiment of autocontrol method of the present invention.
Embodiment
The present invention is the autocontrol method for ozone method cycle of treatment cooling water system design, be used to realize following purpose: set up with direct water quality fouling, burn into microbiological indicator and chemistry, the multiparameter database that physical index combines is set the equilibrated final condition that can guarantee water quality according to the operating mode and the water condition of different user.It mainly carries out following work: at first, mensuration by multiparameter, the recirculated water state that monitoring constantly changes, and the direct indicator of getting wherein contrasts with the database that presets, judging that the residing state of recirculated water is corrosion or fouling tendency, so that the automatic operational order of implementation system dynamically.Secondly, according to the front discharging of the judgement commander cooling circulating water of the state of water and the pump valve of make up water are operated.Moreover, to the discharging of the judgement of the state of water and water with replenish, regulate the ozone generating capacity in real time: increase when needing, reduce when not required according to the front.
Describe the specific embodiment of the present invention in detail below in conjunction with accompanying drawing.
Fig. 1 is the cooling circulating water system synoptic diagram that adopts autocontrol method of the present invention.See also shown in Figure 1ly, the full cycle cooling water system mainly comprises cooling tower 70, water collecting basin 71 and unit cooler 72.Wherein circulating water flow is to being: flow to unit cooler 72 from water collecting basin 71, by with flow to cooling tower 70 after the hot surface of unit cooler contacts, flow back to water collecting basin 71 again through spray.Because the discharging or the evaporation of recirculated water, when causing water level in the water collecting basin 71 to be lower than certain water level, come by-pass valve control 79 by ball float level controller 78, realize that recirculated water is from replenishing the automatic water supplement at water source 80.
Be provided with many transmitters in the total system, detect data, for example: in the cooling water replenishment ingress electricity is installed and is led probe 60, be connected with conductivity meter table 40 by lead, as a supplement the electric conductivity value of water with real-time online.Refrigeration cycle current direction unit cooler 72 1 sides circulating water pipeline in a under meter 61 is installed, be connected with rate of flow meter 41 by lead, as the flux values G of cooling circulating water; A temp probe 62 is installed simultaneously, is connected with thermometer 42, as cooling inflow temperature value t1 by lead; An online tensimeter 43 is installed, as the recoil inlet pressure in the inlet duct of strainer 75; An online tensimeter 44 is installed, as the recoil top hole pressure in the outlet conduit of strainer 75; Cooling circulating water flow out unit cooler 72 1 sides circulating water pipeline in a temp probe 55 is installed, be connected with thermometer 35 by lead, as cooling off leaving water temperature(LWT) value t2.Influx at the thermal medium of unit cooler 72 is installed a temp probe 53, is connected with thermometer 33 by lead, as the temperature in T1 of thermal medium; At the spout of thermal medium a temp probe 54 is installed simultaneously, is connected with thermometer 34 by lead, as the temperature out T2 of thermal medium.At the flow ipe of cooling circulating water with flow out bypass of design between the pipeline, an online corrosion rate instrument 73 is installed in this bypass, be used to test the corrosion rate of cooling circulating water to metal (for example soft steel, red copper).
Hold above-mentioned, one section pipeline of design between refrigeration cycle waterpipe that flows to unit cooler 72 and water collecting basin 71, be used for the injection of ozone, near the water collector side nozzle 76 be installed in this pipeline, the ozone that ozonizer 20 is produced injects circulating water system by nozzle 76; In the front of nozzle 76 an ORP probe 59 is installed, is connected with ORP instrument 39 by lead, the first redox potential ORP1 that is used to detect the ozone decanting point is used for guaranteeing the hydraulic pressure and the flow of this pipeline at topping-up pump 77 of the rear of nozzle 76 installation.Flow into the pipeline place near recirculated water in this pipeline following measuring instrument is installed: electricity is led probe 50, be connected with conductivity meter table 30 by lead, electric conductivity value PH probe 51 as cooling circulating water is connected with PH instrument 31 by lead, as the pH value of cooling circulating water; ORP probe 52 is connected with the ORP instrument by lead, is used to detect the second redox potential ORP2 of heat exchanger (figure does not show) import of unit cooler 72.
In addition, a strainer 75 is installed in the inlet duct of coolant circulation pump 81, and the suspended particle of this strainer 75 in can filtration cycle water makes its deposition, and the water in the recoil water source 82 can pass through recoil valve 22 and recoil pump 23, spring back in the strainer 75, the dirt deposition inside it is washed away.
Should be pointed out that above-mentioned transmitter and instrument all are to decide according to the parameter needs that desire is gathered, the position of its kind, quantity and setting all is not used in qualification the present invention.
Above-mentioned all instrument signals are passed to the monitoring device 120 (please in conjunction with consulting Fig. 2) of automatic control system 100 by the bus communication mode, and can will need the parameter of participation system control to pass to control device 130 in the monitoring device by special-purpose communication cable, the various signals that control device 130 will receive carry out computing, control ozonizer 20 then respectively, recirculated water vent valves 21, recoil valve 22 in the recoiling device and recoil pump 23.Simultaneously on control device 130, reserve a remote communications port, can realize as required and being connected of distance host.
Fig. 2 is according to the designed automatic control system structured flowchart of one embodiment of the invention autocontrol method.See also shown in Figure 2ly, this automatic control system 100 is by four most of compositions that connect successively, and promptly the parameter acquisition device 110, monitoring device 120, control device 130 and topworks 140.Parameter acquisition device 110 is responsible for the detection and the input of parameter, and monitoring device 120 is finished the storage of various data and demonstration; Control device 130 is responsible for the logic of The whole control system is judged and computing, by it and the mode that monitoring device 120 combines, becomes the core of total system, the action of commander topworks 140.Wherein, topworks promptly comprises the ozonizer 20 shown in Fig. 1, bleed valve 21, recoil valve 22 and recoil pump 23.
Hold above-mentionedly, parameter acquisition device 110 further comprises real time data detecting unit 111 and data input cell 112.Real time data detecting unit 111 promptly comprises all the sensors shown in Fig. 1, in order to the various parameters of real-time collection, passes to monitoring device 120 by the communication modes of fieldbus, and to reach real-time, accurate effect, these parameters are listed in following table 1 classification:
Table 1
It may be noted that the transmitter that detects ozonizer cooling water pressure, these parameters of ozonizer cooling water flow is not shown among Fig. 1, yet those skilled in the art can be arranged on the appropriate location fully as required.
Table 2
Wherein first ozone concn is the ozone concn of ozone water decanting point, and second ozone concn is the ozone concn of heat exchanger inlets, can be used for proofreading and correct the above-mentioned first redox potential ORP1 and the second redox potential ORP2.
Preserve the processing parameter (for example parameter in table 1, the table 2) that from monitoring device 120, obtains in the database 131, and the preset value of various processing parameters, be to be used to judge whether normally foundation of each real-time parameter.The preset value of these parameters for example is: fouling resistance value: 3*10
-4m
2K/W, slime content: 4ml/m
3, total plate count 3000CFU/ml, corrosion of carbon steel rate 0.125mm/, first ozone concn: 0.5～1.5ppm, second ozone concn: 0.02～0.08ppm.It should be noted that these preset values and preset range only are for example, actual preset value and preset range can be according to the change of water quality of make up water, and perhaps the variation of season and operating mode is adjusted.
Please in conjunction with Fig. 1～shown in Figure 3, autocontrol method of the present invention may further comprise the steps:
At first, performing step 301 is gathered one group of real-time parameter automatically with real time data detecting unit 111, and wherein this real-time parameter comprises the microbiological indicator of water quality at least, and can determine the fouling resistance value of water quality at least; For instance, the data of gathering comprise at least in real time: in order to cooling inflow temperature t1, cooling leaving water temperature(LWT) t2, thermal medium temperature in T, thermal medium temperature out T2, the circulating cooling water flow G that calculates fouling resistance value R, and such as microbiological indicators such as slime content, total plate count.
In practice, all parameter all adopts the mode of real-time detection uneconomical often and unnecessary, for this reason, in step 301, also comprise the one group of aforesaid regular parameter that receives outside input with data input cell 112, be microbiological indicators such as slime content, total plate count, and total alkalinity, calcium ion, sodium ion, magnesium ion, chlorion, turbidity, TOC/ five-day BOD, indexs such as the first ozone concn DO31, the second ozone concn DO32.Because the not frequent or online testing cost of these data variation is higher, thereby adopt that portable instrument is artificial to be gathered or the method for chamber test by experiment, the data that manually record are passed to monitoring device 120 through data input cell 112, cost-saved.Though also can measure in real time such as microbiological indicators such as slime content, total plate count especially at present by the on-line detector device that is included in the real time data detecting unit 111, but because this quasi-instrument costs an arm and a leg, and that detects in real time has little significance, thereby can adopt the mode of being imported by data input cell 112 to replace real-time measurement.Yet the present invention does not limit the acquisition mode of parameter, and promptly embodiments of the invention can utilize the on-line detector device to gather microbiological indicator or difficult at present other indexs that adopt online detection mode to gather such as slime content, total plate count.
Then, performing step 302, the real-time parameter of being imported according to real time data detecting unit 111 with analytical unit 121 calculates fouling resistance value R, fouling resistance value R is the direct indicator that is used for weighing the fouling tendency of recirculated water, conduct is in the present invention eliminated fouling tendency and the foundation of discharge water, and its calculation formula is
Wherein R is the fouling resistance of cooling circulating water, and A is the heat exchanger heat transfer area, is predictable fixed value, T1/T2 be thermal medium advance/go out temperature, t1/t2 be cooling circulating water advance/go out temperature, G is the cooling water flow by heat exchanger, Cp is a specific heat of water, is 4.15kJ/kg. ℃.
Simultaneously, for the practical ozone scaling index of another one recirculated water fouling tendency index POSI, though it is not accurate enough as fouling tendency merely.But related data that can POSI as a reference, plays the effect of early warning.Therefore, the parameter that analytical unit 122 also can be obtained according to parameter acquisition device 110, calculate POSI and also be transferred to system monitoring unit 122 and show that its expression formula is as follows:
Wherein: Ca, Mg, ALK are respectively the calcium ion of representing with lime carbonate in the make up water, magnesium ion and total alkalinity (mg/litre); Cl, Na are respectively the concentration (mg/litre) of chlorine and sodium ion in the make up water; C0 is for replenishing electrical conductivity of water, and C1 is that recirculated water allows its maximum conductance value that reaches.C1/C0 is the cycles of concentration or the cycle index of recirculated water.
After this, performing step 303, ozone concn control unit 132 is determined a reference mark and is exported ozonizer 20 to according to the microbiological indicator of measuring and the comparative result of the microbiological indicator preset value in the database 131 in the preset range of ozone concn from database 131; For example the slime content when measurement surpasses preset value 4ml/m
3, when perhaps total plate count surpasses 3000CFU/ml, in the preset range of 0.5～1.5ppm, improve above-mentioned first ozone concn, and in 0.02～0.08ppm preset range, improve above-mentioned second ozone concn.The preset range of first, second ozone concn can be reduced into a point, and for example in a preferred embodiment, first ozone concn is set at 1ppm, and second ozone concn is set at 0.02ppm.In another preferred embodiment, first ozone concn can be set at 0.57ppm, and second ozone concn is set at 0.05ppm.Under these situations, first, second ozone concn will adjust near preset value slightly.
This step 303 comprises that preferably a PID controller (figure does not show) that utilizes in the ozone concn control unit 132 carries out closed-loop control.See also shown in Figure 1, detailed process is: after determining good suitable ozone concn reference mark, by with pipeline in ORP probe 59, the 52 redox potential ORP1 that collect, the pairing ozone concn of ORP2 compares, give PID controller with the size and the variation speed of this comparative figure as feedback signal, the PID controller is given ozonizer 20 according to operation result output analog signals m, the ozone of corresponding amount takes place in ozonizer 20 immediately according to the analog quantity size of input, and be injected into by nozzle 76 in the pipeline of cooling circulating water, finished the PID closed-loop control of ozone concn.Wherein the first redox potential ORP1, the second redox potential ORP2 can be recorded by real time data detecting unit 111 in step 301.
In addition, may there be deviation in the ozone concn of above-mentioned redox potential ORP1, ORP2 and reality, for this reason, the present invention comprises that also the first ozone concn DO31, the second ozone concn DO32 of prior mensuration ORP1, ORP2 position come redox potential ORP1, ORP2 are carried out gauged step (for example carrying out fitting of a straight line), to improve accuracy of measurement.
Please get back to Fig. 3 and in conjunction with shown in Figure 1, performing step 304, the fouling resistance value that cooling-water drain control unit 133 relatively calculates and the preset value of the fouling resistance value in the database 131, and surpass preset value 3*10 in the fouling resistance value
-4m
2During K/W, control device is exported the bleed valve 21 of a control signal p to the water collecting basin below, makes bleed valve 21 open draining.
When the water level in the water collecting basin 71 was lower than certain water level, ball float level controller 78 meeting autocontrol valves 79 realized that recirculated water is from replenishing the automatic water supplement at water source 80.After this, keep draining, lead second into 2000uS/ up to detected circulation water power.
In addition, corrosion rate also can be used as the reference index of discharge water, for example the soft steel corrosion rate of cooling-water drain control unit 133 comparison loop water and the preset value 0.125mm/ in the database 131, when the soft steel corrosion rate surpasses 0.125mm/, the numerical value that cooling-water drain control unit 133 needs with reference to fouling resistance value and microbiological indicator, if these two indexs are all qualified, then can not draining there be higher electricity to lead to keep system, can reduce corrosion on the contrary.Only at corrosion rate because emergency and under the situation about significantly raising, cooling-water drain control unit 133 just can carry out the draining action.
Certainly, because through after the discharging, the ozone concn in the water changes, meeting of the present invention this moment automatically according to the feedback of the first redox potential ORP1 and the second redox potential OPR2, is adjusted the generating capacity of ozonizer 20 with ozone concn control unit 132.
Still consult Fig. 3 and in conjunction with shown in Figure 1, performing step 305, utilize the suspended particle in the circulation line of recoiling device recoil cooling circulating water system, this step 305 further comprises the following steps: at first to detect with the tensimeter 43,44 of real time data detecting unit 111 the import/export pressure difference of strainer 75, in recoil control unit 134 the pressure difference preset value in this pressure difference and the database 131 is compared.When this pressure difference surpassed preset value, one control signal f was to open recoil valve 22 for 134 outputs of recoil control unit, makes the water in the water source 82 enter the dirt that washes away in the strainer 75 wherein by recoil pump 23 and recoil valve 22.Facts have proved that this step can reduce the suspended solids in the recirculated water greatly, the degree of cleaning of water are provided.The realization of the main purpose that yet it may be noted that does not carry out recoiling does not influence present method.
In practice, the technician often needs direct Monitoring systems running state parameter and various water-quality guideline, so that can carry out suitable intervention.Therefore above-mentioned step 301 after, also comprise: show real-time parameter, regularly parameter and water-quality guideline with system monitoring unit 122, and control signal corresponding takes place to export when unusual in a certain parameter or index; And, make an alarm unit 123 output corresponding prompt warnings according to the control signal of system monitoring unit 122.Particularly, system monitoring unit 122 data presented comprise: the scaling index POSI of all image data, fouling resistance value, recirculated water maximum conductivity, make up water, the scaling index POSI of recirculated water; The working order of the working order of the running status of ozonizer 20, vent valves 21, recoil valve 22; Target circulation ratio, national water quality reference standard etc.When certain parameter that is monitored occurs when unusual, system monitoring unit 122 will send control signal corresponding, deliver to alarm unit 124, to carry out corresponding action.
When alarm unit 124 receives the control signal of system monitoring unit 122 outputs, will produce corresponding the warning.These warnings can be divided into the warning of equipment state and the warning of water-quality guideline.Equipment state is reported to the police for instance; be low excessively when ozonizer 20 cooling water pressures, components and parts are overheated, oxygen pressure is low excessively, the ozone concentration leakage etc. that exceeds standard is arranged in the air; alarm unit 124 will be reported to the police and be cut off the electricity supply automatically; protection equipment and site safety, can resume operation after needing the user to fix a breakdown by maintenance this moment.And the indicative warning of water quality is promptly done indicative warning to the user for instance under following situation: surpass the value (cycles of concentration) of measuring and estimating according to POSI when specific conductivity; When calcium hardness surpasses 500, when chlorine ion concentration surpasses 1000 mg/litre, when total alkalinity surpasses 500 (in lime carbonate), pH value is less than 8 and individual ions such as phosphoric acid salt, the higher grade of vitriol all can be done indicative warning, cause that the user pays close attention to,, therefore can suitably intervene maybe and wouldn't handle because these indexs are not the direct indicator of reflection water quality.It may be noted that simultaneously since these indexs as just reference, so index choice, and the preset value of index all can be determined voluntarily by the user, and and nonessentially do indicative warning unusually at above-mentioned whole indexs.
In sum, autocontrol method of the present invention is applied in the cooling-tower circulating water, various direct indicators such as comprehensive corrosion rate, online fouling resistance value and microorganism adopt Intelligentized control method to judge corrosion tendency and the fouling tendency of recirculated water under different quality and working condition.By comparing to determine suitable ozone concn value in the recirculated water, realize the closed-loop control of ozone concn in the recirculated water by the PID setter of ozone concn control unit 132 with database 131; With the vent valves 21 of timed unit 130 by the automatic Control Circulation water of each parameter such as fouling resistance value of comparison loop water, and the size of passing through the front and back pressure difference value of strainer 75, recoil pump 23 and recoil valve 22 controlled automatically; System controls in real time and keeps cooling circulating water to be in state to preventing that fouling, corrosion and microorganism are best under different operating modes.Therefore compared to existing technology, the present invention has the following advantages:
1. by autocontrol method of the present invention, can monitor the fouling of ozonize recirculated cooling water in real time, three main directly water-quality guideline of corrosion and microorganism, keep the well balanced state of water quality under the conditions such as make up water of the operating mode of guarantee cooling circulating water earthquake, season, different sources, realize scale inhibition simultaneously, the clean conditions of protection against corrosion and low microorganism.Handle the traditional method that can substitute the adding various medicaments with the ozone method.Its every index all is better than traditional medical method: can efficiently kill and cause the corrosive heterotrophic bacterium, reduce the total plate count of water significantly, kill algae and pathogenic legionella.And, because the ozone method do not make with medicament, thereby eliminated the chemical pollution that the water discharging causes from the source to environment.
By the present invention, make ozonization cooling water circulation realize effectively Detection ﹠ Controling in real time, compare the method that adopts hand control, improved the heat exchanger efficiency, reduce corrosion, and improved service life of equipment.
2, by the relevant estimation of the present invention to recirculated water fouling tendency (POSI) in the ozonize, in conjunction with other relevant processing parameters, determine the recycle number of times (or claiming cycles of concentration) of permission according to different refrigeration cycle aqueous systems, and discharging and replenishment cycles water by controlling automatically, realization improves the utilising efficiency of water to greatest extent.This kind control method has proved than medical method and can allow higher electricity to lead, meaned bigger cycles of concentration.The cycle index of conventional process is 2-3 time at present, can bring up to 5-10 time with present technique, in addition higher.The present invention can utilize different water sources to make recirculated water (for example utilizing some technology to discard water, reuse water etc.).By prior analytical calculation and control, effectively realize water saving significantly.Practice result proves that the present invention is well to the correction actual effect of POSI, the utilization ratio of water can be improved much than calculated value, and guaranteed the comprehensive conformance with standard of water quality.
3, Intelligentized control method can combine the discharging of water with additional and ozone generating capacity, dynamically adjusts quantity and concentration that ozone takes place at any time.By PID control the ozone generating capacity of system can be changed with working condition, for example in water because air or the organism that drops into increase, or because climate reasons when biological mud is increased, the ozone generating capacity will increase, otherwise will reduce.This design not only makes system become more effective, but also the energy consumption of reduction system itself.
Above embodiment explanation only is preferred embodiment explanation of the present invention, and those skilled in the art can make the replacement and the modification of other all equivalence according to the above embodiment of the present invention explanation.Yet these all equivalences of doing according to the embodiment of the invention are replaced and are revised, and belong to invention spirit of the present invention and reach by in the claim that claim defined.
Claims (9)
1. the autocontrol method of a treating cooling circulation water system by ozone, utilize an automatic control system to carry out the detection and the control of cooling circulating water system, this cooling circulating water system comprises water collecting basin, a unit cooler and that flows to cooling tower after water collecting basin provides the cooling tower, of water coolant that water collecting basin is exported water cooling in order to inject the ozonizer of ozone, and wherein this water collecting basin bottom is provided with a bleed valve; This automatic control system has a real time data detecting unit, an analytical unit and a control device, this Data Detection unit comprises a plurality of transmitters of being located in the described cooling circulating water system, this control device has a database, stores microbiological indicator and the preset value of fouling resistance value and the preset range of ozone concn of water quality in the described database; Described autocontrol method comprises:
A. gather one group of real-time parameter automatically with described real time data detecting unit, wherein this group real-time parameter comprises the microbiological indicator of water quality at least, and can determine the fouling resistance value of water quality at least;
B. the real-time parameter of being imported according to the real time data detecting unit with described analytical unit calculates described fouling resistance value;
C. according to the microbiological indicator of measuring and the comparative result of the microbiological indicator preset value in the database, from database, determine a reference mark in the preset range of ozone concn and export described ozonizer to;
D. the fouling resistance value of relatively calculating and the preset value of the fouling resistance value in the database, and export a control signal and make described bleed valve draining when the fouling resistance value surpasses the described control device of preset value.
2. autocontrol method as claimed in claim 1 is characterized in that described microbiological indicator comprises slime content and/or total plate count.
3. autocontrol method as claimed in claim 1 is characterized in that, the calculation formula of described fouling resistance value R is:
Wherein A is the heat exchanger heat transfer area of described unit cooler, and T1/T2 is the import/export temperature of thermal medium, t1/t2 be cooling circulating water advance/go out temperature, G is the cooling water flow by heat exchanger, Cp is a specific heat of water.
4. autocontrol method as claimed in claim 1 is characterized in that described real-time parameter also comprises the corrosion rate of cooling circulating water.
5. autocontrol method as claimed in claim 1 is characterized in that,
Described step a also comprises: receive outside one group of regular parameter importing with a data input cell, wherein can determine practical ozone scaling index POSI in conjunction with described real-time parameter and regular parameter; And
Described step b also comprises: according to described real-time parameter and the regular described ozone scaling index of calculation of parameter.
6. autocontrol method as claimed in claim 1 is characterized in that, also comprises after described step b:
Show described real-time parameter and water-quality guideline with a system monitoring unit, and output control signal corresponding when unusual takes place in a certain parameter or index; And
According to the unitary control signal of system monitoring, make the warning of alarm unit output corresponding prompt.
7. autocontrol method as claimed in claim 1, it is characterized in that, described real-time parameter also comprises second redox potential of heat exchanger inlets of first redox potential, the unit cooler of ozone water decanting point, and described step c also comprises: as feedback signal, regulate the ozone generating capacity of described ozonizer with first redox potential and second redox potential.
8. autocontrol method as claimed in claim 1 is characterized in that, also comprises step e: utilize recoil suspended particle in the circulation line of described cooling circulating water system of a recoiling device, described step e further comprises:
E1., one strainer is provided, and it is located at described water collecting basin and outputs on the pipeline of described unit cooler, and is connected with a recoil pump through a recoil valve, and described recoil pump connection-water source;
E2. detect the import/export pressure difference of strainer with described real time data detecting unit, in described control device, the pressure difference preset value in described pressure difference and the described database is compared; And
E3. export a control signal to open recoil valve when described pressure difference surpasses the described control device of described preset value, make the water in the described water source enter the dirt that washes away in the strainer wherein by recoil pump and recoil valve.
9. autocontrol method as claimed in claim 1 is characterized in that, the preset range of ozone concn is in the described database: the ozone water decanting point is 0.5～1.5ppm, and the heat exchanger inlets place of unit cooler is 0.02～0.08ppm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710041041 CN100545105C (en) | 2007-05-22 | 2007-05-22 | The autocontrol method for the treatment of cooling circulation water system by ozone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710041041 CN100545105C (en) | 2007-05-22 | 2007-05-22 | The autocontrol method for the treatment of cooling circulation water system by ozone |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101058466A CN101058466A (en) | 2007-10-24 |
| CN100545105C true CN100545105C (en) | 2009-09-30 |
Family
ID=38864793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200710041041 Active CN100545105C (en) | 2007-05-22 | 2007-05-22 | The autocontrol method for the treatment of cooling circulation water system by ozone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100545105C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6755084B2 (en) * | 2015-10-30 | 2020-09-16 | 東芝プラントシステム株式会社 | Legionella spp. Countermeasure system, cooled body cooling system, Legionella spp. Countermeasure method and cooled body cooling method of water-cooled substation |
| CN106006928A (en) * | 2016-07-20 | 2016-10-12 | 申昱环保科技股份有限公司 | Automatic control method of ozone synergic treatment circulating cooling water system |
| CN106020258A (en) * | 2016-07-20 | 2016-10-12 | 申昱环保科技股份有限公司 | Ozone amount automatic control system for processing cooling circulating water |
| CN109205761A (en) * | 2017-06-30 | 2019-01-15 | 上海轻工业研究所有限公司 | The recirculating cooling water system and ozone the controlling of injecting quantity device and method of ozone treatment |
| CN112408654A (en) * | 2020-12-08 | 2021-02-26 | 江苏诚品电气有限公司 | Automatic control device of sewage treatment system |
| CN113041373B (en) * | 2021-04-29 | 2023-09-08 | 北京航天三发高科技有限公司 | Cutting fluid ultraviolet disinfection device and disinfection efficiency determination method thereof |
| CN113401954A (en) * | 2021-08-20 | 2021-09-17 | 中冶节能环保有限责任公司 | Prediction method and device for industrial circulating cooling water |
| CN114212839A (en) * | 2021-11-09 | 2022-03-22 | 陕西尚远水务有限公司 | Circulating water integration intelligence management and control system |
| CN117046219B (en) * | 2023-10-11 | 2024-01-05 | 山东向明数智物联科技有限公司 | Industrial circulation energy-saving water supply and drainage control system |
-
2007
- 2007-05-22 CN CN 200710041041 patent/CN100545105C/en active Active
Non-Patent Citations (6)
| Title |
|---|
| 特种循环冷却装置控制系统的研究. 胡振泉等.流体机械，第33卷第8期. 2005 |
| 特种循环冷却装置控制系统的研究. 胡振泉等.流体机械，第33卷第8期. 2005 * |
| 臭氧O3在循环冷却水的应用. 谈向东.上海市制冷学会二OO五年学术年会论文集. 2005 |
| 臭氧O3在循环冷却水的应用. 谈向东.上海市制冷学会二OO五年学术年会论文集. 2005 * |
| 臭氧氧化技术在循环冷却水处理中的应用. 刘艳菊等.山东建筑大学学报，第21卷第5期. 2006 |
| 臭氧氧化技术在循环冷却水处理中的应用. 刘艳菊等.山东建筑大学学报，第21卷第5期. 2006 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101058466A (en) | 2007-10-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100545104C (en) | The automatic control device for the treatment of cooling circulation water system by ozone | |
| CN100545105C (en) | The autocontrol method for the treatment of cooling circulation water system by ozone | |
| CN104250042B (en) | Automatically process and the integrated equipment of sewer reuse and method for recirculated cooling water | |
| CN104502532B (en) | Chemical system circularly-cooling sea water treatment agent device for evaluating performance and method | |
| CN104102255B (en) | Ammonia nitrogen couples dissolved oxygen aeration energy-saving control system and control method | |
| CN107219779A (en) | The addition method and device of a kind of water treatment agent | |
| CN201859334U (en) | Control system for automatic dosing in industrial circulating water and water stabilization | |
| CN104502556A (en) | Performance evaluation device and method for seawater circulating cooling water treating agent for electric power system | |
| CN204918179U (en) | Automatic water treatment detection and control system of online intelligent network | |
| CN113401954A (en) | Prediction method and device for industrial circulating cooling water | |
| CN204138472U (en) | Automatically the integrated equipment with sewer reuse is processed for recirculated cooling water | |
| CN201049912Y (en) | Automatic control system for treating cooling circulation water system by ozone | |
| CN101134613B (en) | Microorganism index control system for quality of ozonization cooling circulated water | |
| CN104773843A (en) | Method for applying reclaimed water obtained after deep treatment of up-to-standard discharged wastewater of automobile factory to cooling water replenishing | |
| ES2594558T3 (en) | Procedure for the operation of a dosing pump and associated dosing device | |
| CN113003758A (en) | Intelligent digital management system and method for circulating cooling water | |
| JP2010247063A (en) | Method and apparatus for injection control of chemical for cooling water | |
| RU133270U1 (en) | AUTOMATED SYSTEM OF MONITORING AND MANAGEMENT OF PHYSICAL AND CHEMICAL PROCESSES OF A COOLING POOL | |
| WO2022193737A1 (en) | Intelligent control system and method for circulating cooling water system | |
| CN100537445C (en) | Microorganism index control method for quality of ozonization cooling water circulation | |
| CN112214044B (en) | Circulating water automatic control system and method based on total amount control | |
| CN201068416Y (en) | Microorganism target control system for cooling circulation water treated by ozone | |
| CN112811576B (en) | Circulating water dynamic simulation experiment device suitable for microbial preparation | |
| CN212050760U (en) | Intelligent accurate water-saving control system of wet-cold thermal power generating unit | |
| CN102229618A (en) | Hexamethylenediamine tetramethylene phosphonic acid disodium salt and its production process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |