CN105417610B - A kind of device and method for removing haloform in water removal - Google Patents
A kind of device and method for removing haloform in water removal Download PDFInfo
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- CN105417610B CN105417610B CN201511005981.XA CN201511005981A CN105417610B CN 105417610 B CN105417610 B CN 105417610B CN 201511005981 A CN201511005981 A CN 201511005981A CN 105417610 B CN105417610 B CN 105417610B
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/36—Organic compounds containing halogen
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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
- C02F2209/005—Processes using a programmable logic controller [PLC]
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention discloses a kind of device and method for removing haloform in water removal, described device includes some aerators, starting device, detection device and robot control system(RCS)；The each aerator includes：Shading rain cap, inflator, floating drum, sealing drum and ejector；The starting device includes inflation motor and ejector motor；The detection device includes：Flowmeter, temperature sensor, residual chlorine detecting instrument and haloform detector；The robot control system(RCS) includes PLC and frequency converter；It the described method comprises the following steps：Aerator, setting PLC are laid, detection device is installed, starts detection device, inflation motor is controlled according to haloform concentration；The device can rapidly and efficiently remove exceeded haloform pollutant in water removal, be not required to lay pipeline during installation, and be aerated again in the device chlorine suction water that comes out stripping, ensure to retain enough free chlorine residuals in water.
Description
Technical field
The present invention relates to water-treatment technology field, and in particular to a kind of device and method for removing haloform in water removal.
Background technology
Traditional water supply plant uses conventional water treatment process, and its step is " coagulation-precipitation-filtering-sterilization ".Wherein sterilize work
Skill is the final step of tradition feedwater plant process flow, is the most critical link for ensureing effluent water quality biological safety.It is but existing
In some sterilization process, the problem of producing DBPs can't be overcome, because DBPs has " three cause property ", effect
In human body easily carcinogenic, teratogenesis and mutagenesis.While increasing sterilization dynamics, ensure to kill pathogenic microorganisms, sterilization is also increased
The amount of accessory substance, causes the risk of output water chemical safety to increase.So DBPs is always handling technology of water supply
Focus on research direction.Haloform be found earliest, most it is wide it is well known, be distributed in drinking water widest one
Kind DBPs.Haloform includes chloroform, a bromodichloromethane, dibromo monochloro methane and bromofom, wherein going out with chloroform
Existing frequency and concentration are highest.In toxicology, haloform have it is certain pathogenic, contact for a long time can produce eyes,
The illness of superficial skin and respiratory system, in addition haloform also there is certain carcinogenic risk.Have when in water supply plant raw water
Machine thing concentration is higher and when being carried out disinfection using liquid chlorine to water, output water has the exceeded risk of haloform DBPs.
Patent 201510282028.3 discloses one kind and utilizes UV/H2O2Remove the method for treating water of haloform in drinking water, this method
Although to the preferable removal effect of haloform, for laying ultraviolet equipment under water supply plant application environment and adding hydrogen peroxide
Medicament, processing cost is high, and the problem of hydrogen peroxide residue be present, is actually difficult to carry out.Patent
201010523355.0 disclose a kind of aeration stripping method during drinking water burst halogenated alkane type organic pollution, its feature
It is that this method is that blast aeration system is laid in water, going for volatility alkyl halide hydro carbons organic pollution is realized by aeration
Remove.Problems be present in such method：Systematic comparison is complicated, it is necessary to set blower equipment, and laying micro-pore aeration pipeline is constructed
Cycle is grown, and is not suitable for base closed and water stopping time is required to lay in short clear water reserviors, cost is higher, very flexible.Clear
Once the mode of laying is improper in pond, it is impossible to preferably control aeration quantity, the chlorine in clear water reserviors is too fast to be come out by stripping, it is difficult to
Realize the emergency processing of the exceeded haloform of clear water reserviors.
The content of the invention
In view of the shortcomings of the prior art, should it is an object of the invention to provide a kind of device for removing haloform in water removal
Device removes haloform in water removal by aeration stripping method, is not required to during installation lay pipeline, and the device is adjusted by robot control system(RCS)
The frequency of section inflation motor, exceeded haloform in high efficient aeration stripping water；Chlorine that the device comes out stripping simultaneously etc.
Disinfectant is sucked in water and is aerated again again, reaches balance, ensures to retain enough free chlorine residuals in water.
To achieve the above object, the present invention adopts the following technical scheme that：A kind of device for removing haloform in water removal, including
Some aerators, starting device, detection device and robot control system(RCS)；
The each aerator includes：Shading rain cap, inflator, floating drum, sealing drum and ejector；The rain cover cap
It is located at the top of inflator；The floating drum is separately mounted to the left and right sides of inflator；The lower end of the sealing drum and inflator
It is connected；The ejector is arranged on the lower end of sealing drum；
The starting device includes inflation motor and ejector motor；The inflation motor is connected with inflator；It is described
Ejector motor is connected with ejector；
The detection device includes：Flowmeter, temperature sensor, residual chlorine detecting instrument and haloform detector；
The robot control system(RCS) includes PLC and frequency converter；
First signal input part of the PLC is connected with the signal output part of flowmeter；The PLC
Secondary signal input be connected with the signal output part of temperature sensor；3rd signal input part of the PLC
It is connected with the signal output part of residual chlorine detecting instrument；The 4th signal input part and haloform detector of the PLC
Signal output part be connected；First signal output part of the PLC is connected with the signal input part of frequency converter；Institute
The signal output part for stating frequency converter is connected with inflating the signal input part of motor；The secondary signal output of the PLC
End is connected with the signal input part of ejector motor.
A kind of preferable scheme as the present invention：The rotating speed of the inflation motor is 500~3000r/min.
A kind of preferable scheme as the present invention：The aeration quantity of the inflator is 10~1000m3/h。
A kind of preferable scheme as the present invention：The inflation depth of water of the inflator is 2~6m.
A kind of preferable scheme as the present invention：The rotating speed of the ejector motor is 500~1500r/min；Through institute
State a diameter of 0.2~2mm of microbubble discharged after the cutting of ejector motor.
It is another object of the present invention to provide a kind of method for removing haloform in water removal, this method passes through in clear water
The device for removing haloform in water removal is laid in pond, by the intelligent regulation inflation electric machine frequency of PLC, reaches and efficiently goes
Except the effect of the haloform in clear water reserviors.
To achieve the above object, the present invention adopts the following technical scheme that：
A kind of method for removing haloform in water removal, using the device for removing haloform in water removal as described above, including
Following steps：
1) some aerators are vertically floated to the stage casing or rear end for being uniformly laid in clear water reserviors gallery；
Aerator is fixed on clear water reserviors gallery with flexible hawser, and aerator floats on the water surface, with clear water reserviors
SEA LEVEL VARIATION and adjust；
2) haloform and the concentration limit of chlorine residue are set respectively in PLC；
3) detection device is arranged on to the delivery port of clear water reserviors；
4) detection device is started, detection device passes to PLC by data are detected；
5) when the concentration of haloform in clear water reserviors is higher than limit value, PLC driving frequency converter and ejector motor；
Transducer drive inflation motor running；
6) when the haloform detector detects that the concentration of haloform is in limits, PLC control
Make the frequency of inflation motor reduce by 5~10Hz；
7) when the haloform detector detects that the concentration of haloform exceeds limit value, PLC control makes to fill
The frequency of Pneumatic generator improves 5~10Hz；
8) repeat step 6) -7), when the frequency for inflating motor is reduced to 0, inflation motor decommissions；The inflation electricity
The highest frequency of machine is 50Hz；
9) when residual chlorine detecting instrument detects that chlorine residue is less than limit value in water, PLC sends alarm, is increased into water and throws chlorine
Amount, residual chlorine concentration are sounded all clear after reaching concentration limit.
As a kind of preferable scheme of the present invention, in step 1), the aerator is 5~10 by gas-water ratio:1 sets
Put；
Gas-water ratio is：Inflate total amount QGas/ maximum water supply flow QWater max, can according to the maximum water supply flow for having surveyed clear water reserviors
Inflation total amount is drawn, in the case of the aeration quantity of each aerator is known, can show that aeration is set by gas-water ratio
Standby quantity.
As a kind of preferable scheme of the present invention, in step 1), the laying distance between each aerator is L, L
≥3m；Hypotelorism, aeration effective range can be overlapping, and so as to which the free halogen air-blowing in water is taken off, Disinfection Effect subtracts
It is weak.
As a kind of preferable scheme of the present invention, in step 5), the frequency during inflation electric motor starting presses following public affairs
Formula calculates：
Wherein k is coefficient, and k is related to water temperature T, and when T≤15 DEG C, k values are 1, work as T>At 15 DEG C, k values be 0.5~
0.8；QWaterFor clear water reserviors water supply flow；QWater maxFor clear water reserviors water supply maximum stream flow；C is the detectable concentration of haloform；CMarkTo be defeated
Enter the concentration limit of the haloform of PLC；fPower frequencyFor 50Hz.
As the present invention a kind of preferable scheme, step 6) and 7) in, it is described inflation motor 1~2h of frequency interval adjust
It is whole once；Interlude is consistent with clear water reserviors hydraulic detention time.
The beneficial effects of the present invention are：
1st, it is of the present invention go water removal in haloform device installation when be not required to lay aerating pipelines in clear water reserviors
And extra setting air blast computer room, by directly laying aerator in water factory's clear water reserviors, fixed, floated with flexible hawser
In on the clear water reserviors water surface, and as clear water reserviors SEA LEVEL VARIATION moves up and down, construction is simple is quick, does not influence clear water reserviors operation, especially
It is adapted to emergency processing during burst pollution；
2nd, the present invention is by the combination of inflator and ejector, and aeration quantity is big, and caused bubble is small, aeration effect
Good, the reaction time is short, and without adding chemical substance, full-automation operation, simple to operate, integrated treatment cost is relatively low；
3rd, the present invention in be provided with detection device, can detect simultaneously water temperature, water supply flow, clear water reserviors water outlet free residual chlorine and
The situation of the various material concentrations of haloform in water, so that timely control device is run；
4th, the present invention adjusts the rotating speed of inflation motor by robot control system(RCS), controls aerator aeration quantity, and intelligent high-efficiency is gone
Except the haloform in clear water reserviors, while greatly reduce energy consumption；
5th, aerator of the present invention uses integrated design, and the disinfectant such as chlorine that stripping can be come out sucks
It is aerated again in water, avoids the disinfectants such as the chlorine added in clear water reserviors and come out by a large amount of strippings, ensures have in clear water water
There are enough free chlorine residuals, reach poised state, output water is met safety standard.
Invention accompanying drawing：
Fig. 1 is the aerator structural representation for removing haloform in water removal of the present invention；
Fig. 2 is layout diagram of the present invention in clear water reserviors；
The electrical block diagram of Fig. 3 present invention.
Wherein, 1, aerator；11st, shading rain cap；12nd, inflator；13rd, floating drum；14th, sealing drum；15th, ejector；2nd, open
Dynamic equipment；21st, motor is inflated；22nd, ejector motor；3rd, detection device；31st, flowmeter；32nd, temperature sensor；33rd, chlorine residue is examined
Survey instrument；34th, haloform detector；4th, robot control system(RCS)；41st, PLC；42nd, frequency converter.
Embodiment
Below, with reference to embodiment, the present invention is described further：
Specific embodiment：
Embodiment 1
Reference picture 1 simultaneously combines Fig. 2, and present embodiment discloses a kind of device for removing haloform in water removal, including some
Aerator 1, starting device 2, detection device 3 and robot control system(RCS) 4；
The each aerator 1 includes：Shading rain cap 11, inflator 12, floating drum 13, sealing drum 14 and ejector 15；
The shading rain cap 11 covers the top for being located at inflator 12；The floating drum 13 is separately mounted to the left and right sides of inflator 12；It is described
Sealing drum 14 is connected with the lower end of inflator 12；The ejector 15 is arranged on the lower end of sealing drum 14.The starting device 2
Including inflation motor 21 and ejector motor 22；The inflation motor 21 is connected with inflator 12；The ejector motor 22
It is connected with ejector 15.The detection device 3 includes：Flowmeter 31, temperature sensor 32, the halogen first of residual chlorine detecting instrument 33 and three
Alkane detector 34.The robot control system(RCS) 4 includes PLC 41 and frequency converter 42.
The rotating speed of the inflation motor 21 is 1500r/min；The aeration quantity of the inflator 12 is 1000m3/ h, inflator
The 12 inflation depth of water is 2.5m；The rotating speed of the ejector motor 22 is 1000r/min；After the ejector motor 22 cutting
A diameter of 0.2~the 2mm of microbubble of release.
Reference picture 3, the first signal input part of the PLC 41 are connected with the signal output part of flowmeter 31；
The secondary signal input of the PLC 41 is connected with the signal output part of temperature sensor 32；The PLC
41 the 3rd signal input part is connected with the signal output part of residual chlorine detecting instrument 33；4th signal of the PLC 41
Input is connected with the signal output part of haloform detector 34；First signal output part of the PLC 41 with
The signal input part of frequency converter 42 is connected；The signal output part of the frequency converter 42 and the signal input part phase for inflating motor 21
Connection；The secondary signal output end of the PLC 41 is connected with the signal input part of ejector motor 22.
The use process of the device is as follows：
1) some aerators 1 are vertically floated to the stage casing for being uniformly laid in clear water reserviors gallery；Between each equipment
Distance be L=10m；
2) haloform is set respectively in PLC 41, including：Chloroform, chlorodibromomethane, Dichloro-monobromo
The concentration limit of methane, bromoform and output water chlorine residue；
3) detection device 3 is arranged on to the delivery port of clear water reserviors；
4) detection device 3 is started, detection device 3 passes to PLC 41 by data are detected；
5) when the concentration of haloform in clear water reserviors is higher than limit value, PLC 41 controls frequency converter 42 to start, frequency conversion
The driving inflation motor 21 of device 42, the running of inflation motor 21 start the pump gas of inflator 12 to sealing drum 14, and then gas is by penetrating
Flow device 15, ejector motor 22 operates bubble is cut into microbubble after spray.
Embodiment 2
Certain waterworks design water 20000m3/ d, using liquid chlorine as disinfectant, clear water reserviors water outlet chloroform concentration
The μ g/L of scope 10.0~265.0, according to《Standards for drinking water quality GB5749-2006》, the content of chloroform is no more than
60ug/L；Therefore, exceeded 4.4 times of highest.
1) using device and method of the present invention as emergency trouble shooting measures, gone described in selection example 1 in water removal
The device of haloform, maximum aeration quantity are 1000m3/ h, by highest output 1000m during water factory3/ h, by gas-water ratio 5:1 lays
Aerator 1, the number of units from aerator 1 are 5；Started with the center of clear water reserviors gallery overall length toward back segment successively cloth
If the laying distance between aerator 1 is 15m, every aerator 1 is fixed in clear water reserviors gallery with scalable hawser
Heart position, aerator 1 swim in the clear water reserviors water surface, and as clear water reserviors height of liquid level can automatically adjust.
2) concentration limit of chlorine residue is set in PLC 41 as 0.3mg/L, the concentration limit of haloform is 60 μ
g/L。
3) in delivery port installation flowmeter 31, temperature sensor 32, residual chlorine detecting instrument 33 and the haloform inspection of clear water reserviors
Instrument 34 is surveyed, data are detected in clear water reserviors water outlet.
4) detection device 3 is started, haloform detector 34 detects that the concentration of chloroform is 216.0ug/L, and PLC is controlled
Device 41 processed drives frequency converter 42 and ejector motor 22；The driving inflation motor 21 of frequency converter 42 operates；Inflate what motor 21 started
Frequency calculates as follows：
T=22 DEG C is measured by temperature sensor 32, k values are 0.75；Q is measured by flowmeter 31Water=815m3/h；
QWater max=1000m3/h；C=216.0ug/L；CMark=60ug/L；fPower frequency=50Hz, according to formula calculate initiation culture f is
11Hz。
5) the frequency interval 2h adjustment of setting inflation motor 21 once, from after inflation motor 21 starts 2h, detects trichlorine
For the concentration of methane in limits, PLC 41 controls the frequency for making inflation motor 21 to reduce 5Hz.
6) after 2h, detect that the concentration of chloroform exceeds limits, the control of PLC 41 makes inflation motor 21
Frequency improves 5Hz.
7) repeat step 5) -6), 0 is reduced to the frequency for inflating motor 21, inflation motor 21, which decommissions or reached, to be filled
The highest frequency 50Hz of Pneumatic generator 21.
By 6h, chloroform detectable concentration is 45ug/L, and chloroform clearance is 79.2%, output water residual chlorine concentration
>=0.3mg/L, meets Effluent criteria.
For those skilled in the art, technical scheme that can be as described above and design, make other each
Kind is corresponding to be changed and deforms, and all these change and deformed the protection model that should all belong to the claims in the present invention
Within enclosing.
Claims (10)
1. a kind of device for removing haloform in water removal, it is characterised in that set including some aerators, starting device, detections
Standby and robot control system(RCS)；
The each aerator includes：Shading rain cap, inflator, floating drum, sealing drum and ejector；The rain cover cap is located at
The top of inflator；The floating drum is separately mounted to the left and right sides of inflator；The sealing drum is connected with the lower end of inflator
Connect；The ejector is arranged on the lower end of sealing drum；
The starting device includes inflation motor and ejector motor；The inflation motor is connected with inflator；The jet
Device motor is connected with ejector；
The detection device includes：Flowmeter, temperature sensor, residual chlorine detecting instrument and haloform detector；
The robot control system(RCS) includes PLC and frequency converter；
First signal input part of the PLC is connected with the signal output part of flowmeter；The of the PLC
Binary signal input is connected with the signal output part of temperature sensor；3rd signal input part of the PLC and remaining
The signal output part of chlorine detector is connected；4th signal input part of the PLC and the letter of haloform detector
Number output end is connected；First signal output part of the PLC is connected with the signal input part of frequency converter；The change
The signal output part of frequency device is connected with inflating the signal input part of motor；The secondary signal output end of the PLC with
The signal input part of ejector motor is connected.
2. the device as claimed in claim 1 for removing haloform in water removal, it is characterised in that：It is described inflation motor rotating speed be
500~3000r/min.
3. the device as claimed in claim 1 for removing haloform in water removal, it is characterised in that：The aeration quantity of the inflator is
10~1000m3/h。
4. the device as claimed in claim 1 for removing haloform in water removal, it is characterised in that：The inflation depth of water of the inflator
For 2~6m.
5. the device as claimed in claim 1 for removing haloform in water removal, it is characterised in that：The rotating speed of the ejector motor
For 500~1500r/min；A diameter of 0.2~the 2mm of microbubble discharged after ejector motor cutting.
6. a kind of method for removing haloform in water removal, described haloform in water removal is removed using claim 1-5 is any
Device, it is characterised in that comprise the following steps：
1) some aerators are vertically floated to the stage casing or rear end for being uniformly laid in clear water reserviors gallery；
2) haloform and the concentration limit of chlorine residue are set respectively in PLC；
3) detection device is arranged on to the delivery port of clear water reserviors；
4) detection device is started, detection device passes to PLC by data are detected；
5) when the concentration of haloform in clear water reserviors is higher than limit value, PLC driving frequency converter and ejector motor；Frequency conversion
Device driving inflation motor running；
6) when the haloform detector detects that the concentration of haloform is in limits, PLC control makes to fill
The frequency of Pneumatic generator reduces by 5~10Hz；
7) when the haloform detector detects that the concentration of haloform exceeds limit value, PLC control makes inflation electric
The frequency of machine improves 5~10Hz；
8) repeat step 6) -7), when the frequency for inflating motor is reduced to 0, inflation motor decommissions；The inflation motor
Highest frequency is 50Hz；
9) when residual chlorine detecting instrument detects that chlorine residue is less than limit value in water, PLC sends alarm, and chlorine-throwed quantity is increased into water,
Residual chlorine concentration is sounded all clear after reaching concentration limit.
7. the method as claimed in claim 6 for removing haloform in water removal, it is characterised in that：In step 1), the aeration is set
Standby gas-water ratio of pressing is 5~10:1 is set.
8. the method as claimed in claim 6 for removing haloform in water removal, it is characterised in that：In step 1), each aeration
Laying distance between equipment is L, L >=3m.
9. the method as claimed in claim 6 for removing haloform in water removal, it is characterised in that：In step 5), the inflation electricity
Frequency when machine starts calculates as follows：
Wherein k is coefficient, and k is related to water temperature T, and when T≤15 DEG C, k values are 1, work as T>At 15 DEG C, k values are 0.5~0.8；
QWaterFor clear water reserviors water supply flow；QWater maxFor clear water reserviors water supply maximum stream flow；C is the detectable concentration of haloform；CMarkTo input PLC
The concentration limit of the haloform of controller；fPower frequencyFor 50Hz.
10. the method as claimed in claim 6 for removing haloform in water removal, it is characterised in that：Step 6) and 7) in, it is described to fill
1~2h of frequency interval adjustment of Pneumatic generator is once.
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| CN102452692A (en) * | 2010-10-22 | 2012-05-16 | 清华大学 | Aeration blowing method in case of sudden volatile halogenated alkane organic substance pollution of drinking water |
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