CN101134612A - Microorganism index control method for quality of ozonization cooling water circulation - Google Patents
Microorganism index control method for quality of ozonization cooling water circulation Download PDFInfo
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- CN101134612A CN101134612A CN 200710044119 CN200710044119A CN101134612A CN 101134612 A CN101134612 A CN 101134612A CN 200710044119 CN200710044119 CN 200710044119 CN 200710044119 A CN200710044119 A CN 200710044119A CN 101134612 A CN101134612 A CN 101134612A
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
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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
- C02F2209/36—Biological material, e.g. enzymes or ATP
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Abstract
The present invention discloses microbial index controlling method for detecting and controlling the water quality in water cooling and circulating system, which includes one water collecting basin with one draining valve in the bottom, one cooling tower, one refrigerator set and one ozone generator for injecting ozone. The controlling method includes: detecting the bacteria number and biological slime, inputting the detected data to one database, comparing the detected data to the reference values in the database to judge the bacterial state of water, outputting one ozone controlling signal to the ozone generator based on the judgment result, and comparing the detected biological slime value to the reference value and outputting one water draining signal to the draining valve if necessary.
Description
Technical field
The present invention relates to a kind of recirculated cooling water treatment process, relate in particular to a kind of microorganism index control method of ozonization cooling water circulation.
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.Medical method mainly adopts many different reagent and the complexing of water intermediate ion to alleviate fouling, regulate potential of hydrogen to prevent corrosion, with the sterilant sterilization, but 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 counterbalance effect.Also improve the chemical ingredients of recirculated cooling water in the practice, lead to bring up to when electricity and to a certain degree carry out discharging and replenish by discharging.Lead height or hardness big the time when additional water power, it is difficult handling with the dosing method.Medical method can not very effective sterilization, and loses efficacy because can develop immunity to drugs, the essential medicament of often changing.Because phosphorous in a large number, the zinc of medical method life-time service, 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.Special needs to be pointed out is that research confirms: the fouling in the recirculated water and the generation of corrosion phenomenon mainly are because the existence of a large amount of microorganisms causes.Biological mud can be with inorganicss all in the water: lime carbonate, dust, corrosion product etc. firmly " bonding " become rigid dirt together, be coated on heat-exchange equipment metallic surface and pipeline, this existing biofouling, the dirt heat transfer property of organic/inorganic substance is very low again, reaches 1 millimeter thickness and can make energy consumption increase about 30%.Below dirt, also can grow a large amount of microorganisms that causes heavy corrosion, as ferrobacillus, sulphur reduction bacterium, nitrifier etc., the spot corrosion of the equipment generation degree of depth is exactly that microbiological corrosion causes.Because biomembranous existence, microorganism can obtain nutrition and protection, and this makes the effect of medicament be greatly diminished again.But strengthen drug level and strengthened the exhaust emission degree exactly.
Owing to there is above-mentioned variety of problems, it is conspicuous adopting chemical-agent technique to come the defective of cycle of treatment water.
The monitoring of medical method mainly is the chemical ingredients according to 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 as previously mentioned, 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, or uses electrolytic process, makes the ion that forms dirt be in the state that surrounded by water molecules, is separated into little crystallization or changes crystal formation, is difficult for forming the scleroma dirt in equipment surface.But find in the practical application water quality is had higher requirements, the de-sludging effect has limitation, 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, the ozone method realizes effects such as scale inhibition, protection against corrosion, sterilization simultaneously as the water treatment of no chemical method.
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.POSI is under the ozonize condition, fouling does not take place in the cooling circulating water can be concentrated at utmost, also can be described as the cycle index of water, is the ratio of the recirculated water electric conductivity value after concentrating with the make up water electric conductivity value on the numerical value.It is under the condition of stable work and environment, a kind of exercisable experience estimation to the circulation terminal point, whether water quality in changeable operational process (for example needs timely adjustment but POSI can not reflect recirculated water, when the water quality of make up water is in operation change), therefore adopt the POSI index to have certain defective as monitoring automatically.
Summary of the invention
Technical problem to be solved by this invention provides a kind of control method of quality of ozonization cooling water circulation, can remain the control to circulating water quality fouling, corrosion and non-pollution discharge, to the regular effective monitoring of the water quality of change in service.
The present invention solves the problems of the technologies described above the microorganism index control method that the technical scheme that adopts provides a kind of quality of ozonization cooling water circulation, and in order to detection and the control of carrying out cooling circulating water system water quality, this method comprises:
A. detect the total plate count and the biological clay of recirculated water;
B. the total plate count and the biological clay data that detect are imported a database, wherein this database has the reference value of this total plate count and this biological clay;
C. relatively be somebody's turn to do total plate count and its reference value that detects, judge the bacterial condition of recirculated water according to this;
D. according to judged result, export an ozone and control signal to this ozonizer; And
E. relatively this biological clay and its reference value, when biological clay surpassed its reference value, output one discharging signal made it to open draining to this bleed valve.
In the above-mentioned control method, the reference value that has N total plate count from small to large in this database, to delimit N+1 scope, N is the natural number more than or equal to 1, and this step c comprises: the relatively total plate count of this detection and each reference value respectively, with the scope at the total plate count place of determining this detection; And determine the bacterial condition that the pairing state of this scope is a recirculated water.
In the above-mentioned control method, have first reference value and second reference value in this database, and in step c, when this total plate count during greater than this first reference value, the bacterial condition of judging recirculated water is not for up to standard; When this total plate count during smaller or equal to this first reference value and greater than second reference value, the bacterial condition of judging recirculated water is for passing; And, judge that the bacterial condition of recirculated water is good when this total plate count during smaller or equal to this second reference value.This first reference value is the 3000CFU/ milliliter, and this second reference value is the 1000CFU/ milliliter.
In the above-mentioned control method, also be included in a default ozone concn scope in this database, and this ozone concn scope is divided into a plurality of concentration sub-range, and this steps d comprises:, determine a corresponding with it concentration sub-range according to the bacterial condition of being judged; And from this concentration sub-range, select a concentration reference mark, export this ozone in view of the above and control signal to this ozonizer.
In the above-mentioned control method, this ozone concn comprises the ozone concn of the heat exchanger inlets of unit cooler.This ozone concn scope can be 0.01～0.10ppm.
In the above-mentioned control method, this ozone concn scope comprises three sub-ranges, and it is respectively more than or equal to 0.01ppm and less than 0.04ppm, more than or equal to 0.04ppm and less than 0.08ppm, more than or equal to 0.08ppm and smaller or equal to 10ppm.
In the above-mentioned control method, this steps d also comprises: earlier this concentration reference mark is converted to an ORP controlling valu, exports this ozone control signal according to this ORP controlling valu again.
In the above-mentioned control method, this steps d also comprises: as feedback signal, adjust the ozone control signal that exports this ozonizer to an ORP detected value.
In the above-mentioned control method, wherein in this step e, each draining and amount of makeup water are lower than a preset proportion of the global cycle water yield, and this preset proportion can be between 10～20%.
Above-mentioned control method, also comprise at interval a setting-up time after, performing step e again.
In the above-mentioned control method, described cooling circulating water system also comprises a recoiling device, this recoiling device comprises a strainer, a recoil valve and a recoil pump, this strainer is located at this water collecting basin and outputs on the pipeline of this unit cooler, and be connected with this recoil pump through this recoil valve, and this recoil pump connects a water source; This method also comprises: detect the import/export pressure difference of this strainer and import in this database, and in this database the reference value of default this pressure difference.Secondly, relatively this pressure difference and this reference value when this pressure difference surpasses this reference value, are exported a control signal to open this recoil valve, make the water in this water source enter the dirt that washes away in the strainer wherein by recoil pump and recoil valve.
The present invention is in the recirculated water with ozonize, based on microbiological indicators such as total plate count and biological clays, replace conventional main monitoring, can reflect the water quality condition of cooling circulating water simpler, effectively, suppress the fouling tendency and the corrosion tendency of Control Circulation water chemical ingredients.Compare existing employing dosing, electromagnetic method, de-sludging of the present invention, effect anticorrosion, killing microorganisms are better, and do not pollute; Compare the ozone treatment method that adopts the POSI index to monitor, the present invention can in time reflect the water quality of recirculated water, reacts faster and adjusts, thereby can improve the recirculated water utilization ratio.
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 control method of the present invention.
Fig. 2 is according to the designed Controlling System structured flowchart of the control method of one embodiment of the invention.
Fig. 3 is the schema of an embodiment of control method of the present invention.
Fig. 4 is the detail flowchart of an embodiment of control method of the present invention.
And body embodiment
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 control method of the present invention.See also shown in Figure 1ly, the full cycle cooling water system mainly comprises cooling tower 10, water collecting basin 11 and unit cooler 12.Wherein circulating water flow is to being: flow to unit cooler 12 from water collecting basin 11, by with flow to cooling tower 10 after the hot surface of unit cooler contacts, flow back to water collecting basin 11 again through spray.Because discharging, evaporation or the drift of recirculated water, when causing water level in the water collecting basin 11 to be lower than certain water level, come by-pass valve control 114 by ball float level controller 112, realize that recirculated water is from replenishing the automatic water supplement at water source 61.In addition,, be provided with a bleed valve 21, can be opened when needed, with discharge water in water collecting basin 11 bottoms.
One section pipeline of design between refrigeration cycle waterpipe that flows to unit cooler 12 and water collecting basin 11, be used for the injection of ozone, near the water collector side nozzle 13 is installed in this pipeline, the ozone that ozonizer 20 is produced injects circulating water system by nozzle 13; A topping-up pump 14 is installed at rear at nozzle 13, is used for guaranteeing the hydraulic pressure and the flow of this pipeline.Certainly, nozzle 13 also can be located at other positions, for example before the inlet of unit cooler 12 or behind the inlet.
Be provided with many transmitters in the total system, detect data with real-time online, the back narration is held in the effect of these transmitters.The signal of transmitter is passed to gathering device 101, and will need the parameter of participation system control to pass to control device 105 by special-purpose communication cable, the various parameters that control device 105 will receive are carried out computing, export control signal then respectively, control ozonizer 20 and recirculated water vent valves 21 realize the adjusting of ozone concn and the control of discharge water.
Fig. 2 is according to the designed Controlling System structured flowchart of the control method of one embodiment of the invention.See also shown in Figure 2ly, this Controlling System comprises a gathering device 101 and a control device 105.Gathering device 101 comprises a detecting unit 102 and an input block 103, and detecting unit 102 is connected with above-mentioned each transmitter, in order to obtain each parameter in the recycle system.Input block 103 can be used for receiving the parameter of outside input, these parameters are for changing the higher parameter of not frequent or online testing cost, for example total plate count and biological clay, adopt that portable instrument is artificial to be gathered or the method for chamber test by experiment, the parameter that manually records is imported through input block 103, cost-saved.But present embodiment also can adopt the on-line determination instrument to measure above-mentioned parameter.In addition, input block 103 for example can be keyboard, touch-screen, communication interface, perhaps other any parts that can receive the input data.
Particularly, the present invention is by the relation of total plate count and its reference value, judge the bacterial condition of recirculated water, take appropriate measures according to this bacterial condition then, in addition, by the relation of biological clay and its reference value, determine whether the biological clay index exceeds standard, under the situation that exceeds standard, open bleed valve 21 drainings.
Under request in person in conjunction with Fig. 1～shown in Figure 3, the control method of one embodiment of the present of invention may further comprise the steps.
At first, performing step S301, the total plate count and the biological clay of detection recirculated water.In the present embodiment, can receive the total plate count and the biological clay parameter value of outside input, also can detect this 2 parameters by the on-line determination instrument by input block 103.
Performing step S302 with total plate count and the biological clay data input base 106 that detects, wherein presets the reference value of this total plate count and this biological clay at database.
Performing step S303 relatively is somebody's turn to do total plate count and its reference value that detects, and judges the bacterial condition of recirculated water according to this.For instance, this bacterial condition can be divided into as required up to standard, exceed standard.When the total plate count that detects during greater than reference value, judge bacterial condition for exceeding standard, otherwise, be judged as up to standard.
Performing step S304 according to judged result, exports an ozone control signal m to this ozonizer 20.For example, current bacterial condition is when exceeding standard, and output improves the ozone control signal of ozone generating capacity, and current state is when being up to standard, and output reduces the ozone control signal of ozone generating capacity, whereby, regulate the ozone generating capacity of ozonizer 20, make that the bacterium in the recirculated water is inhibited.
Performing step S305, relatively this biological clay and its reference value when biological clay surpasses its reference value (exceeding standard), are exported a discharging signal p to this bleed valve, make it to open draining.
In the present embodiment, the total plate count in the database 106 can have first reference value, and it is set at the 3000CFU/ milliliter, and the reference value of biological clay can be set at 2 milliliters/cubic metre.
In a preferred embodiment, have the reference value of N total plate count from small to large in the database 1 06, with N+1 scope of delimitation, the corresponding bacterial condition of each scope, wherein N is the natural number more than or equal to 1.For example establishing reference value is a1, a2 ..., aN, total plate count is b, their scopes of delimiting are respectively so: 0＜b≤a1, a1＜b≤a2 ..., b〉and aN.If N=1, then the scope of Hua Dinging is 2, if N=2, then the scope of Hua Dinging is 3, by that analogy.Correspondingly, 2 pairing bacterial conditions of scope can be set at from big to small exceed standard, up to standard; 3 pairing bacterial conditions of scope are set at exceed standard, pass, good.For instance, in the present embodiment, database 1 06 is set at has first reference value and second reference value, and this first reference value is the 3000CFU/ milliliter, and this second reference value is the 1000CFU/ milliliter.Therefore in step S303, when total plate count during greater than the 3000CFU/ milliliter, the bacterial condition of judging recirculated water is not for up to standard; When this total plate count during smaller or equal to the 3000CFU/ milliliter and greater than the 1000CFU/ milliliter, the bacterial condition of judging recirculated water is for passing; And, judge that the bacterial condition of recirculated water is good when this total plate count during smaller or equal to the 1000CFU/ milliliter.
Simultaneously, in database 106, preset an ozone concn scope, and this ozone concn scope is divided into a plurality of (for example, 3) concentration sub-range, these concentration sub-ranges can be corresponding one by one with the bacterial condition of above-mentioned recirculated water, the ozone concn scope of selecting when each bacterial condition occurring.Particularly, when bacterial condition when being good, select the first concentration sub-range; When bacterial condition is qualifying, select the second concentration sub-range; When bacterial condition when exceeding standard, select the 3rd concentration sub-range.And the value in first to the 3rd concentration sub-range increases successively.Wherein, ozone concn can be chosen in the ozone concn of the heat exchanger inlets of unit cooler 12, and in the present embodiment, this ozone concn scope is 0.01～0.10ppm, and first to the 3rd concentration sub-range is respectively: more than or equal to 0.01ppm and less than 0.04ppm, more than or equal to 0.04ppm and less than 0.08ppm, more than or equal to 0.08ppm and smaller or equal to 0.10ppm, represent to be respectively [0.01 with interval form, 0.04) ppm, [0.04,0.08) ppm, [0.08,0.10] ppm.
Following table 1 is the mapping table in the sub-range of total plate count, bacterial condition and ozone concn, it may be noted that, in different occasions, according to different requirements, the reference value of total plate count, the judgement of bacterial condition, and the selection of ozone concn scope all can change, at this only for illustrating.
Table 1
| Total plate count (CFU/ml) | Bacterial condition | Ozone concn (ppm) | ORP(mv) |
| 0～1000 | Well | [0.01，0.04) | [500，620) |
| 1000～3000 | Pass | [0.04，0.08) | [620，680) |
| >3000 | Exceed standard | [0.08，0.10] | [680，720] |
According to the schema of a preferred embodiment of above-mentioned setting as shown in Figure 4.
At first, performing step S300, according to above-mentioned reference value and the ozone concn scope of setting up each parameter in the database that be described in, secondly, and performing step S301 and step S302, this 2 step is identical with the step of same numeral among Fig. 3, does not repeat them here.
Then, performing step S303, wherein, the performing step S303a of elder generation, relatively be somebody's turn to do total plate count and each reference value that detects respectively, with the scope of the total plate count place bacterial condition of determining this detection, and performing step S303b, the pairing state of this scope (exceed standard, pass or well) is defined as the bacterial condition of recirculated water.
Performing step S304, it comprises step S304a, according to the bacterial condition of being judged, determine the sub-range of a corresponding with it ozone concn, and step S304b, ozone control signal m is exported in view of the above to ozonizer 20 in a selected concentration reference mark from this concentration sub-range.For example, when bacterial condition when exceeding standard, select ozone concn at 0.08ppm, output ozone concn control signal m improves the ozone generating capacities to impel ozonizer 20.When total plate count falls back to the qualifying scope, select ozone concn at 0.04ppm, impel the ozone generating capacity of ozonizer 20 to be reduced to normal level.
In practice, (Oxidation-Reduction Potential ORP) replace ozone concn to control, so ORP is easier to automatic measurement often to adopt redox potential.Therefore, in step S304b, comprise earlier this concentration reference mark is converted to an ORP controlling valu, export this ozone control signal m according to this ORP controlling valu again.Circulation (example of the corresponding relation of ozone concn value and ORP controlling valu can be consulted table 1).Wherein, can carry out the closed loop adjustment, reach target ORP controlling valu up to detecting the ORP value at the ORP detected value ORP1 at the heat exchanger inlets place of unit cooler 12 as feedback signal.Please get back to shown in Figure 1ly, wherein detect the redox potential ORP1 of heat exchanger (figure does not show) ingress of unit cooler 12, input to gathering device 101, and ORP probe 32 is connected with ORP instrument 42 by lead with ORP probe 32.In addition, the method for closed loop adjustment for example is proportion integration differentiation (PID) control method.
Performing step S305, this step is identical with step S305 shown in Figure 3, but it is to be noted, in the discharge water process, the concentration that can keep the circulation ozone in water is roughly in the qualifying scope (promptly 0.04～0.08ppm), and each draining and amount of makeup water are lower than a preset proportion of the global cycle water yield, and this preset proportion can be between 10-20%.After the draining, certain interval of time, for example 24 hours, treat water mesophytization sufficient reacting after, performing step S305 as biological clay index this moment (promptly less than 2 milliliters/cubic metre) up to standard, then enters normal operation, if also below standard once more, also carry out draining, so repeatedly, up to up to standard.
In addition, please refer to shown in Figure 1, for the dirt that accumulates in the flush cycle water system, cooling circulating water system comprises a recoiling device, this recoiling device comprises a strainer 15, a recoil valve 22 and a recoil pump 23, strainer 15 is located at water collecting basin 11 and outputs on the pipeline of unit cooler 12, and is connected with recoil pump 23 through recoil valve 22, and recoil pump 23 connects a water source 62.An online tensimeter 44 is installed, as recoil inlet pressure p1 in the inlet duct of strainer 15.An online tensimeter 45 is installed, as recoil top hole pressure p2 in the outlet conduit of strainer 15.Correspondingly, as shown in Figure 2, this Controlling System also comprises a recoil control unit 109, and its input terminus is connected to database 106, and its output terminal is connected to recoil valve 22 and recoil pump 23.And present method is further comprising the steps of: detect in the import/export pressure difference (p2-p1) and input database 106 of this strainer 15, and preset the reference value of this pressure difference in database 106; Recoil control unit 109 is this pressure difference and this reference value relatively, when this pressure difference surpasses this reference value, export a control signal f to open recoil valve 22, the water in the water source 62 is entered in the strainer 15 by recoil pump 23 and recoil valve 22, wash away dirt wherein.
It is worthy of note,, carry out above-mentioned control flow although generally speaking, but make the water quality of recirculated water remain on state preferably, and avoided frequent discharging and replacing.But circulate in practice, unlimitedly and realize that zero release is unpractical.Therefore,, need to determine a cycle index, when reaching cycle index, all change recirculated water for a specific recycle system.In the present embodiment, come the cycle index of Monitoring systems with cycles of concentration, cycles of concentration is meant the electric conductivity value C0 of recirculated water and the ratio of the electric conductivity value C1 of make up water.See also shown in Figure 1ly, electricity is installed in the cooling water replenishment ingress is led probe 31, be connected with conductivity meter table 41 by lead, with the electric conductivity value C1 of detection make up water.Lead probe 33 at electricity, be connected with conductivity meter table 43, to detect the electric conductivity value C0 of cooling circulating water by lead.
In sum, the present invention has carried out monitoring and control automatically to total plate count and two microbiological indicators of biological clay, and it has the following advantages compared to existing technology:
1, compares the existing control method of employing, the present invention is by detecting automatically and inhibition total plate count and biological clay, the fouling tendency and the corrosion tendency that can effectively suppress recirculated water, improve the water quality of recirculated water, thereby promoted the efficiency of heat exchanger, reduced corrosion, and improved the work-ing life of equipment.
2, control method of the present invention has proved than medical method and can allow higher electricity to lead, and this means bigger cycles of concentration and cycle index.The cycle index of conventional process is 2-3 time at present, may bring up to 5-10 time with present method, can be higher when additional water quality is better.Therefore the present invention can improve the utilization ratio of recirculated water.
3, control process of the present invention must manually not participate in (except the detection of partial data) for finishing automatically, can take measures to keep the water quality of the recirculated water of dynamic change timely.
4, the present invention is owing to can keep the water quality of the recirculated water of dynamic change, thereby may utilize different water sources to make recirculated water and (for example utilize some technology to discard water, reuse water etc.) by prior analytical calculation and control, partly or entirely replace fresh tap water, have very big water saving potential.
Though the present invention discloses as above with preferred embodiment; right its is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when can doing a little modification and perfect, so protection scope of the present invention is as the criterion when defining with claims.
Claims (14)
1. the microorganism index control method of quality of ozonization cooling water circulation, in order to water quality detection and the control of carrying out cooling circulating water system, this cooling circulating water system comprises water collecting basin, the cooling tower of water coolant is provided, flows to the unit cooler of cooling tower after the water collecting basin output water cooling and in order to inject the ozonizer of ozone, wherein this water collecting basin bottom is provided with a bleed valve to water collecting basin; It is characterized in that this method comprises:
A. detect the total plate count and the biological clay of recirculated water;
B. the total plate count and the biological clay data that detect are imported a database, wherein this database has the reference value of this total plate count and this biological clay;
C. relatively be somebody's turn to do total plate count and its reference value that detects, judge the bacterial condition of recirculated water according to this;
D. according to judged result, export an ozone and control signal to this ozonizer; And
E. relatively this biological clay and its reference value, when biological clay surpassed its reference value, output one discharging signal made it to open draining to this bleed valve.
2. the method for claim 1 is characterized in that, has the reference value of N total plate count from small to large in this database, and to delimit N+1 scope, N is the natural number more than or equal to 1, and this step c comprises:
Total plate count and each reference value that relatively should detect respectively is with the scope at the total plate count place of definite this detection;
Determine the bacterial condition that the pairing state of this scope is a recirculated water.
3. method as claimed in claim 2 is characterized in that, has first reference value and second reference value in this database, and in step c,
When this total plate count during greater than this first reference value, the bacterial condition of judging recirculated water is not for up to standard;
When this total plate count during smaller or equal to this first reference value and greater than second reference value, the bacterial condition of judging recirculated water is for passing; And
When this total plate count during, judge that the bacterial condition of recirculated water is good smaller or equal to this second reference value.
4. method as claimed in claim 3 is characterized in that, this first reference value is the 3000CFU/ milliliter, and this second reference value is the 1000CFU/ milliliter.
5. the method for claim 1 is characterized in that, also is included in a default ozone concn scope in this database, and this ozone concn scope is divided into a plurality of concentration sub-range, and this steps d comprises:
According to the bacterial condition of being judged, determine a corresponding with it concentration sub-range; And
A selected concentration reference mark is exported this ozone in view of the above and is controlled signal to this ozonizer from this concentration sub-range.
6. method as claimed in claim 5 is characterized in that this ozone concn comprises the ozone concn of the heat exchanger inlets of unit cooler.
7. method as claimed in claim 6 is characterized in that, this ozone concn scope is 0.01～0.10ppm.
8. method as claimed in claim 7, it is characterized in that this ozone concn scope comprises three sub-ranges, it is respectively more than or equal to 0.01ppm and less than 0.04ppm, more than or equal to 0.04ppm and less than 0.08ppm, more than or equal to 0.08ppm and smaller or equal to 0.10ppm.
9. method as claimed in claim 4 is characterized in that, this steps d also comprises: earlier this concentration reference mark is converted to an ORP controlling valu, exports this ozone control signal according to this ORP controlling valu again.
10. method as claimed in claim 9 is characterized in that, this steps d also comprises:
As feedback signal, adjust the ozone control signal that exports this ozonizer to an ORP detected value.
11. the method for claim 1 is characterized in that, among this step e, each draining and amount of makeup water are lower than a preset proportion of the global cycle water yield.
12. method as claimed in claim 11 is characterized in that, this preset proportion is between 10～20%.
13. method as claimed in claim 11 is characterized in that, also comprise at interval a setting-up time after, performing step e again.
14. the method for claim 1, it is characterized in that, described cooling circulating water system also comprises a recoiling device, this recoiling device comprises a strainer, a recoil valve and a recoil pump, this strainer is located at this water collecting basin and outputs on the pipeline of this unit cooler, and be connected with this recoil pump through this recoil valve, and this recoil pump connects a water source; This method also comprises:
Detect the import/export pressure difference of this strainer and import in this database, and in this database the reference value of default this pressure difference;
Relatively this pressure difference and this reference value when this pressure difference surpasses this reference value, are exported a control signal to open this recoil valve, make the water in this water source enter the dirt that washes away in the strainer wherein by recoil pump and recoil valve.
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| CN 200710044119 CN100537445C (en) | 2007-07-23 | 2007-07-23 | Microorganism index control method for quality of ozonization cooling water circulation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105585104A (en) * | 2016-03-01 | 2016-05-18 | 大连理工大学 | Circulating cooling water ozone bypass-flow treatment system and method |
| 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 |
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2007
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105585104A (en) * | 2016-03-01 | 2016-05-18 | 大连理工大学 | Circulating cooling water ozone bypass-flow treatment system and method |
| CN105585104B (en) * | 2016-03-01 | 2018-04-27 | 大连理工大学 | A kind of circulating cooling water-ozone parallel seismic method system and method |
| 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 |
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| CN100537445C (en) | 2009-09-09 |
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