CN108829146A - The control method and system of open type cooling water chemicals dosing plant - Google Patents
The control method and system of open type cooling water chemicals dosing plant Download PDFInfo
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- CN108829146A CN108829146A CN201810690687.4A CN201810690687A CN108829146A CN 108829146 A CN108829146 A CN 108829146A CN 201810690687 A CN201810690687 A CN 201810690687A CN 108829146 A CN108829146 A CN 108829146A
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- cooling water
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D11/00—Control of flow ratio
- G05D11/02—Controlling ratio of two or more flows of fluid or fluent material
- G05D11/13—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means
- G05D11/139—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means by measuring a value related to the quantity of the individual components and sensing at least one property of the mixture
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Abstract
The present invention provides the control method and system of a kind of open type cooling water chemicals dosing plant, the method includes：The liquid Adding medicine control instruction generated according to triggering human-computer interaction interface, the timed liquid Adding medicine control instruction generated in the human-computer interaction interface setup time or the liquid Adding medicine control instruction control liquid feeding device operation generated according to the sewage quantity of blowdown apparatus；The blowdown control instruction generated according to triggering human-computer interaction interface or the blowdown control instruction control of sewage disposal device operation generated according to the conductivity of the cooling water detected；The solid Adding medicine control instruction generated according to triggering human-computer interaction interface, the timing solid Adding medicine control generated in the human-computer interaction interface setup time instruct or generate the instruction control solid medicating device operation of solid Adding medicine control according to the oxidation-reduction potential difference of the cooling water detected.The present invention may be implemented chemicals dosing plant Chinese medicine it is automatic, accurate, add in time, manual operation cost is effectively reduced, it is highly-safe, and versatility is good.
Description
Technical field
The invention belongs to environmental technology fields, more particularly to water-treatment technology field, specially a kind of open cooling
The control method and system of water chemicals dosing plant.
Background technique
Open type cooling water system is widely used in industrial production and civilian central air-conditioning facility, in day-to-day operation, meeting
Generate following quality problem：Burn into caused by ion concentration caused by oxygen and evaporation and concentration that the external world is brought into increases is concentrated by evaporation
Thus microbial reproduction caused by the pollution of fouling, suitable water temperature and the external world caused by causing hardness and basicity to increase simultaneously causes
Microbiologic(al) corrosion etc., therefore medicine machine need to be equipped with and implement daily dosing water process, the control including cycles of concentration, scale inhibition
Corrosion inhibiter, fungicide add.Common open type cooling water Adding medicine control mode mainly includes at present：
1) artificial dosing.This is dosing method the most original, i.e., manually medicament is carried on cooling tower, is poured into cold
But collecting-tank, for example add solid oxychloride fungicide.The dosing method is least safe, and since dosing impact is excessive,
Adding consistency not can guarantee.
2) timing controlled dosing.Simple medicine machine need to be equipped with.Since dosing is based entirely on time controller, therefore when cold
But when Water l oad variation causes blowdown flow rate to change, which can not be mapped with blowdown flow rate, dosing or deficiency
It is excessive；When cooling water suspends operating according to actual needs, timing dosing can not accomplish stopping synchronous with system operating, lead
Still the waste even medicament of medicament is caused to accumulate and block chemical feed pipe in dosing when causing to stall.
3) in such a way that online conductivity meter control of sewage disposal is currently used control cycles of concentration, have than artificial blowdown
Advantage, but blowdown flow rate still disconnects with dosage, sewage pipe blowdown, chemical feed pipe dosing.
4) colour comparatour configured in medicine machine, certain component or tracer in on-line determination medicament, with this component
The medicament is represented, when testing result deficiency, i.e., starting adds, and dosage is calculated automatically by PLC.The theoretically dosing side
Formula is more accurate, but interference of the practical colour comparatour vulnerable to cooling water turbidity, and testing result is caused to generate deviation；Certain groups of sortings
The participation for also needing chemical reaction is surveyed, needs to place analytical reagent container in chemicals dosing plant, also needs periodically to add reagent, it is more numerous
It is trivial；In addition, the dosing method is needed using specified medicament scheme, versatility is poor；And it needs to be equipped with costly online
Colour comparatour is unfavorable for promoting and applying so that the purchase cost of entire medicine machine exponentially increases.
Therefore, it is necessary to develop a kind of open type cooling water automatic dosing control system, be able to achieve medicament it is automatic, accurate,
It adds in time, avoids excessive dosing or dosing insufficient；Manual operation cost is effectively reduced, it is highly-safe；And versatility is good, is convenient for
It promotes and applies.
Summary of the invention
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide a kind of open type cooling water dosing dresses
The control method and system set need artificial dosing bring people for solving open type cooling water chemicals dosing plant in the prior art
Power is at high cost, is easy to appear the problem of excessive dosing or dosing deficiency.
In order to achieve the above objects and other related objects, the present invention provides a kind of control of open type cooling water chemicals dosing plant
Method, applied to include liquid feeding device, solid medicating device and blowdown apparatus cooling water chemicals dosing plant in, the opening
The control method of formula cooling water chemicals dosing plant includes：According to triggering human-computer interaction interface generate liquid Adding medicine control instruction, in
The instruction of timed liquid Adding medicine control or the sewage quantity according to the blowdown apparatus that the human-computer interaction interface setup time generates
It generates the instruction of liquid Adding medicine control and controls the liquid feeding device operation；Blowdown control is generated according to triggering human-computer interaction interface
Instruction controls the blowdown apparatus operation according to the blowdown control instruction that the conductivity of the cooling water detected generates；According to touching
Send out the timing solid that the solid Adding medicine control that human-computer interaction interface generates is instructed, generated in the human-computer interaction interface setup time
Adding medicine control instruction or the solid Adding medicine control instruction control institute generated according to the oxidation-reduction potential difference of the cooling water detected
State solid medicating device operation.
In one embodiment of the invention, the control method of the open type cooling water chemicals dosing plant further includes：Detection institute
The streamflow regime of the dosing pipe of liquid feeding device and the solid medicating device is stated, and in dosing pipe cutout time control
It makes the liquid feeding device and the solid medicating device stops dosing and the blowdown apparatus is out of service.
In one embodiment of the invention, the control method of the open type cooling water chemicals dosing plant further includes：Control institute
It states liquid feeding device and the solid medicating device forms dosing interlocking to avoid dosing simultaneously；Control the liquid dosing dress
It sets or the solid medicating device forms blowdown-dosing with the blowdown apparatus and interlocks to avoid dosing blowdown simultaneously；Described
Liquid feeding device and the solid medicating device in succession dosing when, when delay after the completion of a kind of chemicals dosing plant dosing is default
Between after, control another chemicals dosing plant and start dosing.
In one embodiment of the invention, the control method of the open type cooling water chemicals dosing plant further includes：Described
When dosing pipe stops, when the liquid feeding device, the solid medicating device or the blowdown apparatus operation troubles, carry out
Alarm.
In one embodiment of the invention, the control method of the open type cooling water chemicals dosing plant further includes：Record institute
State the operation data and fault data of liquid feeding device, the solid medicating device and the blowdown apparatus.
In one embodiment of the invention, the control method of the open type cooling water chemicals dosing plant further includes：Record institute
State the configuration data of liquid feeding device, the solid medicating device and the blowdown apparatus, operation data and fault data
It is uploaded to a host computer.
The embodiment of the present invention also provides a kind of control system of open type cooling water chemicals dosing plant, is applied to include liquid
In the cooling water chemicals dosing plant of chemicals dosing plant, solid medicating device and blowdown apparatus, the open type cooling water chemicals dosing plant
Control system includes：Human-computer interaction terminal, including a human-computer interaction interface, for generating liquid according to triggering human-computer interaction interface
Adding medicine control instruction generates the instruction of timed liquid Adding medicine control according to the setup time of the human-computer interaction interface, according to triggering
Human-computer interaction interface generates blowdown control instruction, generates the instruction of solid Adding medicine control according to triggering human-computer interaction interface or according to institute
The setup time for stating human-computer interaction interface generates the instruction of timing solid Adding medicine control；Controller, including control unit are used for basis
The sewage quantity of the blowdown apparatus generates the instruction of liquid Adding medicine control and is instructed according to the liquid Adding medicine control of generation and from described
The liquid Adding medicine control instruction that human-computer interaction terminal receives controls the liquid feeding device operation；According to the cooling detected
The conductivity of water generates blowdown control instruction and receives according to the blowdown control instruction of generation and from the human-computer interaction terminal
Blowdown control instruction system described in blowdown apparatus operation；Solid is generated according to the oxidation-reduction potential difference of the cooling water detected to add
Medicine control instruction and the solid dosing control for being instructed according to the solid Adding medicine control of generation and being received from the human-computer interaction terminal
System instruction controls the solid medicating device operation.
In one embodiment of the invention, the controller further includes cutout detection unit, is added for detecting the liquid
The streamflow regime of the dosing pipe of medicine device and the solid medicating device, and the liquid is controlled in dosing pipe cutout
Body chemicals dosing plant and the solid medicating device stop dosing and the blowdown apparatus is out of service.
In one embodiment of the invention, the controller further includes interlocking time delay unit, is added for controlling the liquid
Medicine device and the solid medicating device form dosing interlocking to avoid dosing simultaneously, control the liquid feeding device or described
Solid medicating device and the blowdown apparatus form blowdown-dosing interlocking and add to avoid dosing blowdown simultaneously in the liquid
Medicine device and the solid medicating device in succession dosing when, a kind of delay preset time after the completion of chemicals dosing plant dosing it
Afterwards, it controls another chemicals dosing plant and starts dosing.
In one embodiment of the invention, the controller further includes alarm unit, for stopping in the dosing pipe
When, when the liquid feeding device, the solid medicating device or the blowdown apparatus operation troubles, alarm.
In one embodiment of the invention, the controller further includes：Database Unit, for recording the liquid dosing
The operation data and fault data of device, the solid medicating device and the blowdown apparatus.
In one embodiment of the invention, the control system of the open type cooling water chemicals dosing plant further includes：Communicate mould
Block, the configuration data of the liquid feeding device, the solid medicating device and the blowdown apparatus for that will record, fortune
Row data and fault data are uploaded to a host computer.
As described above, the control method and system of open type cooling water chemicals dosing plant of the invention, have below beneficial to effect
Fruit：
The present invention may be implemented chemicals dosing plant Chinese medicine it is automatic, accurate, add in time, be effectively reduced manual operation at
This, it is highly-safe, and versatility is good, the equipment cost of required outfit is low, easy to promote and utilize.
Detailed description of the invention
Fig. 1 is shown as the principle schematic diagram of the control system of open type cooling water chemicals dosing plant of the invention.
Fig. 2 is shown as the functional block diagram of controller in the control system of open type cooling water chemicals dosing plant of the invention.
Fig. 3 is shown as the overall flow schematic diagram of the control method of open type cooling water chemicals dosing plant of the invention.
Anti-incrustation corrosion inhibitor concentration trend chart when Fig. 4 is shown with existing cooling water system.
Total hardness and conductivity data trend chart when Fig. 5 is shown with existing cooling water system.
Cycles of concentration and LSI data variation tendency chart when Fig. 6 is shown with existing cooling water system.
Anti-incrustation corrosion inhibitor concentration becomes when Fig. 7 is shown with the control system of open type cooling water chemicals dosing plant of the invention
Change tendency chart.
Total hardness and conductivity number when Fig. 8 is shown with the control system of open type cooling water chemicals dosing plant of the invention
According to trend chart.
Cycles of concentration and LSI number when Fig. 9 is shown with the control system of open type cooling water chemicals dosing plant of the invention
According to trend chart.
Component label instructions
The control system of 100 open type cooling water chemicals dosing plants
110 human-computer interaction terminals
120 controllers
121 control units
122 Database Unit
123 cutout detection units
124 interlocking time delay units
125 alarm units
200 cooling water chemicals dosing plants
210 liquid feeding devices
220 blowdown apparatus
230 solid medicating devices
S110~S130 step
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from
Various modifications or alterations are carried out under spirit of the invention.It should be noted that in the absence of conflict, following embodiment and implementation
Feature in example can be combined with each other.
It should be noted that illustrating the basic structure that only the invention is illustrated in a schematic way provided in following embodiment
Think, only shown in schema with it is of the invention in related component rather than component count, shape and size when according to actual implementation draw
System, when actual implementation kenel, quantity and the ratio of each component can arbitrarily change for one kind, and its assembly layout kenel can also
It can be increasingly complex.
The purpose of the present embodiment is that the control method and system of a kind of open type cooling water chemicals dosing plant are provided, for solving
Certainly open type cooling water chemicals dosing plant needs artificial dosing bring human cost high in the prior art, is easy to appear excessive dosing
Or the problem of dosing deficiency.The control method of open type cooling water chemicals dosing plant of the invention described in detail below and system
Principle and embodiment makes those skilled in the art not need creative work and is appreciated that open type cooling water of the invention adds
The control method and system of medicine device.
As shown in Figure 1, being applied to packet the present embodiment provides a kind of control system 100 of open type cooling water chemicals dosing plant
It includes in the cooling water chemicals dosing plant 200 of liquid feeding device 210, solid medicating device 230 and blowdown apparatus 220, the opening
The control system 100 of formula cooling water chemicals dosing plant includes：Human-computer interaction terminal 110 and controller 120.
Below to 110 He of human-computer interaction terminal of the control system 100 of open type cooling water chemicals dosing plant in the present embodiment
Controller 120 is specifically described.
In this present embodiment, the human-computer interaction terminal 110 includes a human-computer interaction interface, for according to the man-machine friendship of triggering
Mutual interface generates the instruction of liquid Adding medicine control or generates timed liquid dosing control according to the setup time of the human-computer interaction interface
System instruction, generates blowdown control instruction according to triggering human-computer interaction interface, generates solid dosing according to triggering human-computer interaction interface
Control instruction generates the instruction of timing solid Adding medicine control according to the setup time of the human-computer interaction interface.
In this present embodiment, the controller 120 is preferably PLC controller, as shown in Fig. 2, the controller 120 includes
Control unit 121, for generating the instruction of liquid Adding medicine control according to the sewage quantity of the blowdown apparatus 220 and according to the liquid of generation
The liquid Adding medicine control instruction that body Adding medicine control is instructed and received from the human-computer interaction terminal 110 controls the liquid dosing
Device 210 is run；Blowdown control instruction is generated according to the conductivity of the cooling water detected and is referred to according to the blowdown of generation control
Blowdown apparatus 220 described in order and the blowdown control instruction system received from the human-computer interaction terminal 110 is run；According to detecting
Cooling water oxidation-reduction potential difference generate solid Adding medicine control instruction and according to the solid Adding medicine control of generation instruct and from
The solid Adding medicine control instruction that the human-computer interaction terminal 110 receives controls the solid medicating device 230 and runs.
In this present embodiment, the control unit 121 in the controller 120 is virtualized by the program control instruction that can be run
It forming, a kind of control method of open type cooling water chemicals dosing plant may be implemented in the control unit 121 in the controller 120,
As shown in figure 3, the control method of the open type cooling water chemicals dosing plant includes：
Step S110 is instructed, according to the liquid Adding medicine control that triggering human-computer interaction interface generates in human-computer interaction circle
The instruction of timed liquid Adding medicine control or liquid dosing control is generated according to the sewage quantity of the blowdown apparatus that face setup time generates
System instruction controls the liquid feeding device operation；
Step S120 generates blowdown control instruction according to triggering human-computer interaction interface or according to the electricity of the cooling water detected
The blowdown control instruction that conductance generates controls the blowdown apparatus operation；
Step S130 is instructed, according to the solid Adding medicine control that triggering human-computer interaction interface generates in human-computer interaction circle
The instruction of timing solid Adding medicine control or generated according to the oxidation-reduction potential difference of the cooling water detected that face setup time generates
The instruction of solid Adding medicine control control solid medicating device operation.
Above-mentioned steps S110 to step S130 has no sequencing, i.e., the control unit 121 in the described controller 120 controls
Liquid feeding device operation, controls the blowdown apparatus operation and controls the solid medicating device operation and have no successively
Sequentially, control sequence can be adjusted according to actual needs.
In this present embodiment, the controller 120 is instructed according to the liquid Adding medicine control that triggering human-computer interaction interface generates
It controls the operation of liquid feeding device 210 to manually control, that is, passes through the button in man-machine interface in human-computer interaction terminal 110
The control for carrying out equipment manually is clicked, mainly uses the party when to equipment debugging or when temporary needs large dosage supplement medicament
Formula.
The timed liquid Adding medicine control instruction that human-computer interaction interface setup time generates in the human-computer interaction terminal 110
The operation of liquid feeding device 210 i.e. timing controlled, i.e. setting time control program are controlled, when control program timing arrival is set
When fixing time, automatic starting and corresponding working equipment is closed.When cooling water system, which exists, largely leaks or float water, Wu Faji
Displacement is measured, then the method control can be used.
The instruction of liquid Adding medicine control, which is generated, according to the sewage quantity of the blowdown apparatus 220 controls the liquid feeding device
210 operations are controlled according to water amount of blowdown.Contain blowdown stream of pulses scale in the blowdown apparatus 220, can be sent out simultaneously in blowdown
Pulse signal out, single pulse signal represent certain water amount of blowdown, and after a blowdown, controller is according to receiving
Total umber of pulse automatically controls measuring equipment operation.
The operation of blowdown apparatus 220 is controlled according to triggering human-computer interaction interface generation blowdown control instruction to arrange manually
It is dirty.Automatic blowdown valve also has manual switch control method, mainly when to equipment debugging or when a large amount of blowdowns of temporary needs
Using this method.
The operation of blowdown apparatus 220 is controlled i.e. according to the blowdown control instruction that the conductivity of the cooling water detected generates
Automatic pollution discharge.When the cycles of concentration of cooling water is increased to certain value, in order to prevent in cooling water salt content (with conductivity table
Show) it is excessively high and lead to fouling, corrosion and microbial reproduction risk, need timely blowdown.When work, when online conductivity meter measures electricity
When conductance reaches the upper limit value of setting, start blowdown；As blowdown carries out, cooling water system conductivity gradually declines, when being down to
When the lower limit value of setting, the end of a blowing period being indicated, issuing blowdown flow rate pulse signal, realization is added automatically by blowdown flow rate
Medicine.
The solid Adding medicine control instruction generated according to triggering human-computer interaction interface controls the solid medicating device 230 and runs
Manually control.Measuring equipment is opened or closed by the button in man-machine interface manually, mainly when to equipment debugging
Or due to using which when bacterium algae breeding especially severe needs interim large dosage to add fungicide.
The timing solid Adding medicine control instruction generated in the human-computer interaction interface setup time is timing controlled.It is arranged
PLC time control program.When the breeding of cooling water system bacterium algae is not serious, or requires lower to bacterium algae control, this can be used
Control mode, i.e., inhibit bacterium algae not excessive multiplication by impact dosing method, and the dosing frequency can be bred according to specific bacterium algae
Situation adjustment.
The solid Adding medicine control instruction generated according to the oxidation-reduction potential difference of the cooling water detected controls the solid
The operation of chemicals dosing plant 230 is controlled according to oxidation-reduction potential difference ORP.Oxidation-reduction potential difference ORP reflects cooling water system
Oxidability.Certain ORP value can correspond to certain chlorine content substantially, and precision can satisfy cooling water to solid chlorine completely
The control of oxidizing bactericide dosage requires.When work, reached under setting according to the ORP that on-line oxidation reduction potential instrument measures
Limit value and upper limit value control chlorination.
In this present embodiment, as shown in Fig. 2, the controller 120 further includes cutout detection unit 123, for detecting
The streamflow regime of the dosing pipe of liquid feeding device 210 and the solid medicating device 230 is stated, and disconnected in the dosing pipe
The liquid feeding device 210 is controlled when stream and the solid medicating device 230 stops dosing and the blowdown apparatus 220 stops
Only run.
According to actual needs due to cooling water system, provisional stoppage in transit may be made or seasonal stoppage in transit, circulating pump stall,
And chemicals dosing plant or blowdown apparatus 220 are still remaining operational at this time, it would still be possible to continue blowdown or dosing, this will lead to medicament and
The waste at water source, in addition will cause medicament deposit in dosing pipe blocking and system pipe network unplanned property empty.Therefore, exist
Flow switch is installed on dosing shunt valve, when cooling water circulating pump stalling, dosing bypass in-pipe flow gradually slows down until stopping
Fluid stopping is dynamic, and the flow switch signal that will stop is sent to PLC, and PLC can close all metering pumps, and in cooling water circulating pump
Restore operating, before restoring water flow in dosing bypass duct, all metering pumps cannot be automatically turned on.
In this present embodiment, as shown in Fig. 2, the controller 120 further includes interlocking time delay unit 124, for controlling
It states liquid feeding device 210 and the solid medicating device 230 forms dosing interlocking to avoid dosing simultaneously, control the liquid
Chemicals dosing plant 210 or the solid medicating device 230 and the blowdown apparatus 220 form blowdown-dosing interlocking to avoid simultaneously
Dosing blowdown, and in the liquid feeding device 210 and 230 dosing in succession of solid medicating device, it is filled in a kind of dosing
After setting the delay preset time after the completion of dosing, controls another chemicals dosing plant and start dosing.
Dosing interlocking ensures when adding any medicament, temporarily locks adding for other medicaments, avoids while when dosing,
Medicament, which contacts with each other, to be chemically reacted.What needs to be explained here is that although under interlocking state, it may loss section drug dispensing agent
Dosage, even if without interlock function, the chance that different agents add simultaneously is considerably less, and cooling water medicine adding after all
The embodiment for the treatment of effect is to emerge from during a long-term, lasting dosing, therefore a small amount of medicament caused by interlocking damages
Mistake has no effect on whole water treatment efficiency.
Blowdown-dosing interlocking, i.e., when the automatic feeding for just in automatic pollution discharge, suspending medicament, vice versa.In this way
The loss of medicament is reduced as far as possible.
In the liquid feeding device 210 and 230 dosing in succession of solid medicating device, add in a kind of chemicals dosing plant
After delay preset time after the completion of medicine, controls another chemicals dosing plant and start the i.e. dosing delay of dosing, i.e., a kind of medicament adds
It is complete, several minutes of general automatic time delay, then add another medicament, it is ensured that previous medicament all flows in dosing bypass duct
Walk to enter cooling pond, and also spread apart in cooling pond, prevent local concentration excessively high and with rear adding medicine
Learn reaction.
In this present embodiment, as shown in Fig. 2, the controller 120 further includes alarm unit 125, in the dosing
When pipeline stops, 220 operation troubles of the liquid feeding device 210, the solid medicating device 230 or the blowdown apparatus
When, it alarms.
Such as there is the dosing by-pass flow pipe cutout of the liquid feeding device 210 and the solid medicating device 230, metering
Pump should automatically turn on but reality is inactive, and under normal circumstances, chemicals dosing plant should be run under auto state, after preventing manual operation
Forgeing to reset causes dosing to be alarmed extremely such as 220 motor-driven valve failure of the blowdown apparatus, when blowdown motor-driven valve is answered
It automatically turns on or closes, but reality is not normally-open or puts capable alarm into.
Particularly, odd-numbered day maximum water amount of blowdown is set for the blowdown apparatus 220.When cooling water normal operation
Under, the blowdown flow rate in odd-numbered day generally has a maximum value (can be estimated and be obtained according to recirculated water water and thermic load), but due to
Line conductivity meter failure and being continuously detected conductivity the upper limit and leads to long-time automatic pollution discharge beyond setting, it is unnecessary to will lead to
Water loss.Therefore by setting highest odd-numbered day blowdown flow rate, once the accumulated pulse number of the received blowdown flow table of PLC converts
Resulting water amount of blowdown reaches the setting value, that is, blowdown motor-driven valve is automatically closed, and issues alarm, until artificial debugging
Or automatic blowdown function could be restored after resetting odd-numbered day maximum water amount of blowdown.
In this present embodiment, as shown in Fig. 2, the controller 120 further includes：Database Unit 122, it is described for recording
The operation data and fault data of liquid feeding device 210, the solid medicating device 230 and the blowdown apparatus 220.
By the operation data and fault data of record, operations staff can search rundown time section at any time, understand control fortune
Row situation.Such as the blowdown apparatus 220, can automatically record water amount of blowdown daily in one week, electronic valve opening time,
The data such as alarm logging, and can be by the USB interface on control cabinet by data copy to computer, convenient for statistics, analysis one week
Operating condition.
For the liquid feeding device 210, when can also can automatically record metering pump dosing operating daily in one week
Between, cutout period, the data such as metering pump fault alarm record, and can be by the USB interface on control cabinet by data copy
To computer, convenient for one week statistics, analysis operating condition.
For the solid medicating device 230 can also can automatically record in one week the daily chlorination motor-driven valve a shut-in time,
The opening time of chlorination motor-driven valve b, the two periods should be it is the same, such as it is different, need to further check reason, in addition
There are also the data such as alarm logging, and can be by the USB interface on control cabinet by data copy to computer, convenient for statistics, analysis
One week operating condition.
In originally applying in example, the control system 100 of the open type cooling water chemicals dosing plant further includes：Communication module is used for
By the configuration data of the liquid feeding device 210 of record, the solid medicating device 230 and the blowdown apparatus 220,
Operation data and fault data are uploaded to a host computer.
The communication module can send data to host computer by wireless network signal, and host computer can be shown and live phase
Same man-machine interface, including the liquid feeding device 210, the solid medicating device 230 and the blowdown apparatus 220 are each
Operating condition, automatic control parameter setting situation, alarm logging, database of a component etc.；Synchronously, can also be believed by mobile
It number is transmitted on mobile phone, equally can show and live identical man-machine interface.
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from
Various modifications or alterations are carried out under spirit of the invention.
The existing open central air conditioning cooling water system of certain domestic automobile factory's refrigeration plant, for cooling down summer sky
Call refrigeration centrifugal chiller.
The main water quality internal control parameter of the system is：
The system water disposition is as follows：
2 metering pumps are only equipped with, wherein metering pump a metered flow 9.6L/h, for adding anti-incrustation corrosion inhibitor；Metering pump
B metered flow 44L/h, for adding non oxidizing bactericide.2 metering pumps all use manual switch control, no robot control system(RCS).
Raw medicine agent water process there are the problem of it is as follows：
1) anti-incrustation corrosion inhibitor fluctuation of concentration is big, is unable to reach normal concentration requirement.Since artificial switch metering can only be relied on
Pump, therefore adding for anti-incrustation corrosion inhibitor completely disengages out with the operating condition of cooling water system and water amount of blowdown, after each dosing
Very high concentrations in short time, or even far beyond normal concentration, and over time, anti-incrustation corrosion inhibitor concentration is gradually reduced,
It is lower than normal concentration in turn, it is overall in the trend that fluctuates widely.Not only caused excessive dosing or dosing insufficient in this way, but also cannot send out
Wave good scale inhibitor effect.Scale inhibition is slow in the cooling water system during Fig. 4 is summer current year August part operation of air conditioner top
Lose agent concentration variation tendency.
2) water quality indicator fluctuation is big, extremely unstable.Due to only controlling cycles of concentration by implementing artificial drainage, cause
After just draining, water quality indicator declines to a great extent, and as time goes by, cycles of concentration rapid increase, water quality indicator is also followed fast
Speed rise in addition it is exceeded.Fig. 5 is main water quality indicator in the cooling water system of summer current year August part operation of air conditioner peak period
Concentration (total hardness and conductivity data) variation tendency；Fig. 6 is summer current year August part operation of air conditioner peak period cooling water system
Main water quality indicator concentration (cycles of concentration and LSI data) variation tendency in system.
Due to the above problem 1), 2) presence, cause medicament to fail the scale effect played stably, along with variation water quality
The indexs such as LSI are caused to have exceeded control standard in certain periods, so that the duration of runs longer 4 centrifugal refrierators in system
There is scale formation in various degree, the small temperature difference is higher, and energy consumption obviously rises, wherein (normal be 1 DEG C to up to 3 DEG C of 2 small temperature difference
Below), cause to shut down.Finally have to implement pickling descaling to this 4 train condensers.Problem 1), 2) there are same
Medicament is caused to fail to stablize performance corrosion inhibition, 2 lacing film monitoring data of August part and total iron, total copper water quality data are shown, rotten
The remote system of system corrosion control of erosion rate is substantially at runaway condition.If things go on like this, the copper pipe of system pipeline, especially condenser exists
The risk of perforation.Tables 1 and 2 is respectively summer current year August part operation of air conditioner peak period lacing film and total iron, total copper data.
1 lacing film monitoring data of table：
| Index | August 15 days | August 31 days | Inner quality standard |
| Carbon steel (mm/a) | 0.330 | 0.428 | < 0.075 |
| Copper (mm/a) | 0.031 | 0.036 | < 0.005 |
The total iron of table 2, total copper water quality data：
| Index | August 3 days | August 11 days | August 19 days | August 27 days | Inner quality standard |
| Total iron (mg/L) | 2.12 | 2.77 | 3.05 | 2.6 | < 1.0 |
| Total copper (mg/L) | 0.18 | 0.21 | 0.26 | 0.19 | < 0.1 |
Since cooling water especially easily breeds bacterium algae during summer peak load operation, need enough to add solid oxychloride in time
Property fungicide.The medicament needs manual handling to roof and adds in cooling pond, heavy workload, climbs roof cooling tower again
It is absolutely unsafe, in order to reduce risk as far as possible, operator reduces the adding of agent frequency, 3 times/week of normal need, reduces
To 1 times/week；Meanwhile it can also achieve the purpose that control bacterium algae breeding, operation under the frequency for wanting to add at only 1 times/week
Personnel will more add concentration and increase substantially 30mg/L from 10mg/L, lead to chlorine residue moment remote hypervisor standard, but immediately
It is down to 0mg/L again, is unable to reach stable bactericidal effect.Entire August part most of the time bacterial population is exceeded, bacterium algae in cooling tower
Breeding is serious and generates a large amount of foundry loams, and most serious is once the foundry loam that falls off by 3 recirculated cooling water mouth piece filter net jams
And lead to 3 compressor emergency shutdowns.Table 3 is summer current year August part operation of air conditioner peak period total number of bacteria data：
Table 3
Open type cooling water control system for adding drugs and method performance are described as follows in the present embodiment：
This open type cooling water automatic control system and method implementation process are as follows：
1) Adding medicine control of liquid anti-incrustation corrosion inhibitor
By the way of controlling dosing according to water amount of blowdown.Key parameter pulse system p calculates as follows：
The discharge coefficient q of pulse water meter：The blowdown flow table bore that the cooling water system is equipped with is DN100, every row 1m3 water
Issue 1 pulse signal, as 1m3/ pulse；
The standard of anti-incrustation corrosion inhibitor adds concentration c：By control standard 100mg/L；
The calibrated flow Q of metering pump a：14.5kg/h is (since metering pump chemical feeding points back pressure is only@0.33MPa, metering pump
Metered flow is 9.5kg/h@0.76MPa, therefore calibrational capacity is greater than metered flow)；
Pulse system is：P=3.6qc/Q
=3.6 × 1 × 100/14.5
=25 second/pulses.
It is according to water amount of blowdown dosing that metering pump a is arranged in man-machine interface；It is 25 second/arteries and veins that pulse system is arranged again
Punching, anti-incrustation corrosion inhibitor can enter according to water amount of blowdown Adding medicine control mode.Remaining control function, including cutout control, interlocking
It has been set in this control system such as delay, alarm, database, Long-Range Surveillance System, it is not necessary to be operated.
2) automatic pollution discharge controls
Cooling water conductivity is set first and controls bound, is existed according to system water supplement (tap water) stable conductivity
350uS/cm or so comprehensively considers scale inhibition, Corrosion Control ability and the water-saving needs of medicament, the daily cycles of concentration control of the cooling water
At 4.5 ± 0.1 times, then cool down water conductivity control upper and lower limit is respectively system：1540,1610uS/cm.
In addition setting odd-numbered day maximum displacement is needed.According to the system former years refrigeration unit, in August part day operation platform, number is most
About 120h, displacement needed for single unit is about 1.8m3/h when operation, then odd-numbered day maximum displacement is about：216m3.Odd-numbered day
Maximum displacement can be adjusted according to number when different time sections platform.
It is set as controlling automatic pollution discharge mode according to conductivity in man-machine interface, then conductivity control upper and lower limit is set
1540,1610uS/cm, setting odd-numbered day maximum displacement are 216m3.
Remaining control function, including cutout control, interlocking and this control such as delay, alarm, database, Long-Range Surveillance System
It has been set in system, it is not necessary to be operated.
3) control of solid oxychloride fungicide
Chlorine residue is controlled according to ORP, realization continuously adds, 0.1~0.2mg/L of chlorine residue control range.Setting ORP is needed first
The bound of control.Since under the premise of the moisturizing water quality of the system, cycles of concentration are certain, pH value is substantially a stabilization
Value is 8.8 or so, consults related data, and under the pH condition, it is about 440mV that chlorine residue, which corresponds to ORP value when being 0.1mg/L,
About 480mV when 0.2mg/L might as well be first arranged by this value, according to the ORP value of the chlorine content and display surveyed during operation into
Row adjustment, to obtain the ORP control range for more meeting the system.
It is set as in man-machine interface according to ORP Adding medicine control mode, then ORP upper and lower limit 480,440mV is set.
After operation tracking 1 week, according to actual measurement chlorine residue and ORP value, ORP upper and lower limit is adjusted to 460,430mV, substantially
It can stablize chlorine content control within the scope of 0.1~0.2mg/L.
The present embodiment open type cooling water automatic control system implementation result is as follows：
1) anti-incrustation corrosion inhibitor concentration energy stability contorting is in 100 ± 15mg/L, and fluctuates very little.It is controlled in conjunction with automatic pollution discharge and is
System, using according to water amount of blowdown Adding medicine control mode, so that medicament, dosing progress can be supplemented in time automatically after blowdown every time
It get a qualitative improvement.Anti-incrustation corrosion inhibitor concentration in the cooling water system during Fig. 7 is summer next year August part operation of air conditioner top
Variation tendency.
2) main water quality indicator is completely within the scope of internal control.Pass through automatic pollution discharge control system, the main water of the cooling water
Matter index all controls in critical field, and data stabilization, fluctuates very little.Fig. 8 is that summer next year August part operation of air conditioner is high
Main water quality indicator concentration (total hardness and conductivity data) variation tendency in the cooling water system during peak.Fig. 9 is summer next year
Main water quality indicator concentration (cycles of concentration and LSI data) variation in the cooling water system of season August part operation of air conditioner peak period
Trend.
3) stablize due to realizing above-mentioned anti-incrustation corrosion inhibitor 1), 2) and add and water stabilization, all centrifugal refrierators
Group normal operation, feeds back, each small temperature difference of centrifugal chiller is all in 1 DEG C or less according to facility operation side.Similarly due to realizing
Anti-incrustation corrosion inhibitor stabilization adds and water stabilization, table 4 and table 5 show 2 lacing film monitoring data and total iron, total copper water prime number respectively
According to rate of corrosion is far below standard, and corrosion control is good.
4 lacing film monitoring data of table：
| Index | August 14 days | August 30 days | Inner quality standard |
| Carbon steel (mm/a) | 0.022 | 0.018 | < 0.075 |
| Copper (mm/a) | 0.001 | 0.001 | < 0.005 |
The total iron of table 5, total copper water quality data：
| Index | August 2 days | August 10 days | August 18 days | August 26 days | Inner quality standard |
| Total iron (mg/L) | 0.45 | 0.37 | 0.40 | 0.41 | < 1.0 |
| Total copper (mg/L) | 0.052 | 0.038 | 0.027 | 0.046 | < 0.1 |
Due to realizing automatically continuously adding for solid oxychloride fungicide, chlorine residue control is stablized, as shown in table 6, whole
A August part bacterial population is stablized in control standard, and is in low level, breeds in cooling tower without obvious bacterium algae, circulating cooling water pump
Suction inlet strainer is without clogging.
Table 6
In addition, since the robot control system(RCS) has the function of cutout control, interlocking and delay, the limitation of odd-numbered day maximum displacement etc.,
During whole service, do not occur medicament mix, excessive dosing, excessive blowdown the problems such as, effectively ensured that entire control is
The operating of system.Meanwhile by plc data library, site operation personnel can obtain related data information in time, so that entire water process
Operation is among effectively controlling；General headquarters technical staff can also understand operation conditions by Long-Range Surveillance System, and in time be existing
Field operator provides guidance and help.
In conclusion the present invention may be implemented chemicals dosing plant Chinese medicine it is automatic, accurate, add in time, people is effectively reduced
Power operating cost, it is highly-safe, and versatility is good, the equipment cost of required outfit is low, easy to promote and utilize.So the present invention
It effectively overcomes various shortcoming in the prior art and has high industrial utilization value.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should be covered by the claims of the present invention.
Claims (12)
1. a kind of control method of open type cooling water chemicals dosing plant is applied to include liquid feeding device, solid medicating device
In the cooling water chemicals dosing plant of blowdown apparatus, which is characterized in that the control method packet of the open type cooling water chemicals dosing plant
It includes：
It instructed according to the liquid Adding medicine control that triggering human-computer interaction interface generates, generated in the human-computer interaction interface setup time
Timed liquid Adding medicine control instruction or according to the sewage quantity of the blowdown apparatus generate liquid Adding medicine control instruction control described in
Liquid feeding device operation；
The row for generating blowdown control instruction according to triggering human-computer interaction interface or being generated according to the conductivity of the cooling water detected
Dirty control instruction controls the blowdown apparatus operation；
It instructed according to the solid Adding medicine control that triggering human-computer interaction interface generates, generated in the human-computer interaction interface setup time
Timing solid Adding medicine control instruction or according to the oxidation-reduction potential difference of the cooling water detected generate solid Adding medicine control
Instruction controls the solid medicating device operation.
2. the control method of open type cooling water chemicals dosing plant according to claim 1, which is characterized in that described open
The control method of cooling water chemicals dosing plant further includes：
The streamflow regime of the dosing pipe of the liquid feeding device and the solid medicating device is detected, and in the chemical feed pipe
Road controls the liquid feeding device when stopping and the solid medicating device stops dosing and the blowdown apparatus stops fortune
Row.
3. the control method of open type cooling water chemicals dosing plant according to claim 1, which is characterized in that described open
The control method of cooling water chemicals dosing plant further includes：
It controls the liquid feeding device and the solid medicating device forms dosing interlocking to avoid dosing simultaneously；
It controls the liquid feeding device or the solid medicating device and forms blowdown-dosing interlocking with the blowdown apparatus to keep away
Exempt from while dosing blowdown；
In the liquid feeding device and the solid medicating device dosing in succession, after the completion of a kind of chemicals dosing plant dosing
After the preset time that is delayed, controls another chemicals dosing plant and start dosing.
4. the control method of open type cooling water chemicals dosing plant according to claim 2, which is characterized in that described open
The control method of cooling water chemicals dosing plant further includes：
In dosing pipe cutout, the liquid feeding device, the solid medicating device or blowdown apparatus operation
When failure, alarm.
5. the control method of open type cooling water chemicals dosing plant according to claim 4, which is characterized in that described open
The control method of cooling water chemicals dosing plant further includes：
Record the operation data and number of faults of the liquid feeding device, the solid medicating device and the blowdown apparatus
According to.
6. the control method of open type cooling water chemicals dosing plant according to claim 1 or 5, which is characterized in that described to open
The control method for putting formula cooling water chemicals dosing plant further includes：
Record the configuration data of the liquid feeding device, the solid medicating device and the blowdown apparatus, operation data
A host computer is uploaded to fault data.
7. a kind of control system of open type cooling water chemicals dosing plant is applied to include liquid feeding device, solid medicating device
In the cooling water chemicals dosing plant of blowdown apparatus, which is characterized in that the control system packet of the open type cooling water chemicals dosing plant
It includes：
Human-computer interaction terminal, including a human-computer interaction interface, for generating liquid Adding medicine control according to triggering human-computer interaction interface
Instruction generates the instruction of timed liquid Adding medicine control according to the setup time of the human-computer interaction interface, according to triggering human-computer interaction
Interface generates blowdown control instruction, generates the instruction of solid Adding medicine control according to triggering human-computer interaction interface or according to the man-machine friendship
The setup time at mutual interface generates the instruction of timing solid Adding medicine control；
Controller, including control unit, for generating the instruction of liquid Adding medicine control and root according to the sewage quantity of the blowdown apparatus
According to described in the liquid Adding medicine control instruction control that the liquid Adding medicine control of generation instructs and receives from the human-computer interaction terminal
Liquid feeding device operation；Blowdown control instruction is generated according to the conductivity of the cooling water detected and according to the blowdown control of generation
Blowdown apparatus operation described in system instruction and the blowdown control instruction system received from the human-computer interaction terminal；According to what is detected
The oxidation-reduction potential difference of cooling water generates the instruction of solid Adding medicine control and is instructed according to the solid Adding medicine control of generation and from institute
It states the solid Adding medicine control instruction that human-computer interaction terminal receives and controls the solid medicating device operation.
8. the control system of open type cooling water chemicals dosing plant according to claim 7, which is characterized in that the controller
It further include cutout detection unit, the water flow of the dosing pipe for detecting the liquid feeding device and the solid medicating device
State, and the liquid feeding device and solid medicating device stopping dosing and institute are controlled in dosing pipe cutout
The blowdown apparatus stated is out of service.
9. the control system of open type cooling water chemicals dosing plant according to claim 7, which is characterized in that the controller
Further include interlocking time delay unit, forms dosing interlocking for controlling the liquid feeding device and the solid medicating device to keep away
Exempt from while dosing, controls the liquid feeding device or the solid medicating device and the blowdown apparatus forms blowdown-dosing
It interlocks to avoid dosing blowdown simultaneously, and in the liquid feeding device and the solid medicating device dosing in succession, one
After delay preset time after the completion of kind chemicals dosing plant dosing, controls another chemicals dosing plant and start dosing.
10. the control system of open type cooling water chemicals dosing plant according to claim 9, which is characterized in that the control
Device further includes alarm unit, for the dosing pipe cutout when, the liquid feeding device, the solid medicating device or
When the blowdown apparatus operation troubles, alarm.
11. the control system of open type cooling water chemicals dosing plant according to claim 7 or 10, which is characterized in that described
Controller further includes：
Database Unit, for recording the fortune of the liquid feeding device, the solid medicating device and the blowdown apparatus
Row data and fault data.
12. the control system of open type cooling water chemicals dosing plant according to claim 11, which is characterized in that the opening
The control system of formula cooling water chemicals dosing plant further includes：Communication module, it is the liquid feeding device for that will record, described solid
The configuration data of body chemicals dosing plant and the blowdown apparatus, operation data and fault data are uploaded to a host computer.
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