CN1087714C - Ozone treatment method and device - Google Patents
Ozone treatment method and device Download PDFInfo
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- CN1087714C CN1087714C CN95120816A CN95120816A CN1087714C CN 1087714 C CN1087714 C CN 1087714C CN 95120816 A CN95120816 A CN 95120816A CN 95120816 A CN95120816 A CN 95120816A CN 1087714 C CN1087714 C CN 1087714C
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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
- C02F1/72—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
- C02F2209/003—Downstream control, i.e. outlet monitoring, e.g. to check the treating agents, such as halogens or ozone, leaving the process
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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
- C02F2209/23—O3
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Abstract
To decrease an ozone injection rate by adequately maintaining the quality of treated water at the time of subjecting the water to be treated to an ozone injection treatment in a water purification plant, etc., or a sewerage treating plant. Ozone is injected into the water Wo to be treated in an ozone contact basin 7 and the dissolved ozone concn. DO3 of the treated water after the ozone injection is detected by a dissolved ozone concn. meter 64 is detected. The deviation between the dissolved ozone concn. DO3 detected in such a manner and the set target value Ko of the dissolved ozone concn. of the treated water is determined by a comparator 61. The consumption of the ozone which reacts with the consuming component of the ozone in the water Wo to be treated is determined by an ozone consumption measuring instrument 22 and the set target value Ko of the dissolved oxygen concn. is lowered in correspondence to the decrease in the calculated ozone consumption at the time of controlling the ozone injection rate into the water Wo to be treated base on this deviation. Then, the water quality after the ozone injection of the water to be treated which is an object for the ozone injection treatment is adequately maintained and the ozone injection rate is lowered.
Description
The present invention relates in water purification field or following water treatment field, the ozone treatment method and the ozone treatment apparatus that carry out in order to remove organism such as the soil ulmin that becomes the precursor that three methyl halides generate and odorous substance etc. particularly relate to and control the ozone injection rate aptly and too insufficient suitable ozone injection control method and ozone injection control device can not occur.
In recent years, the organochlorine compounds such as three methyl halides that contain in the foreign odor of tap water flavor and the tap water are a problem very much.Foreign odor flavor is that the result of pollution of waterhead such as the river that causes because of living drainage or lake and blue algae breeding feels.And organochlorine compound is in order to remove the ammonium-nitrogen in the former water, or the corrosive deposit of chlorine that injects for sterilization and former water reaction back and the material that generates.Organochlorine compound has carinogenicity, thereby people tend to reduce the injection rate of chlorine.
Based on this background, the so-called height clean water treatment of carrying out the processing of ozonize and biological activated carbon comes into one's own.Ozonize is that strong oxidizing power by means of ozone decomposes the material as foreign odor flavor reason, makes it decolouring, deodorization, further reduces the generation of organochlorine compound.Biological activated carbon is handled, and is by decomposing ammonium-nitrogen etc. attached to the microbial process on the gac, and the by product that is generated by ozone and organic reaction is adsorbed and removes or the method by microbiological degradation.About this height clean water treatment, open clear 58-174288 communique the spy, the spy opens in the flat 2-233197 communique and the spy opens in the flat 4-281893 communique open.
In ozonize, the ozone generation efficiency of ozonizer is very low, and the required electric power of per unit product is very high, about 20KWh/kgO
3, therefore require the ozone input rate is restricted to necessary inferior limit.
Ozone input rate in the ozonize changes with water quality.Therefore, be originally ozone concn and organic substance concentration etc. controlled the ozone injection rate as controlling index still do not have to measure rapidly the suitable transmitter of ozone concn and organic substance concentration etc.Therefore, will drain into the useless ozone concn the gas phase or the dissolved ozone concentration that remains in the liquid phase is injected control as controlling index from the ozonize groove.
The dissolved ozone concn is kept certain, so that the certain control method of dissolved ozone concn maybe keeps certain with the ozone concn of discharging, so that the certain control method of useless ozone concn of discharging, according to the understanding that becomes present main flow, even so also can think effectively.But these ozone injection control methods are all nothing but feedback control.Just in case the organic substance concentration in the processed water sharply increases, carry out ozonize with in the past ozonize groove during control ozone input rate and will seem that action is too slow, consequently, the foreign odor of tap water flavor is removed not exclusively.And when the organic substance concentration in the processed water significantly reduced, the ozone amount of injection had surpassed requirement.This will waste the ozone that consumes high electric power.
Organic substance concentration in the processed water sharply increases owing to heavy rain makes organism flow into river so that organism from the field, and the mud that is deposited in the river bed is when raining heavyly rolled up to sneak into and made it rapid increase in the water.
The objective of the invention is to solve above-mentioned problem, can excessive insufficient ozone treatment method and ozone treatment apparatus even provide the rapid variation of a kind of organic substance concentration can control aptly that the ozone input rate makes it yet.
Feature of the present invention is, after processed water is imported ozone contact tank, carry out in the method for ozonize, a part that imports ozone contact tank processed water is before extracted out as sample water, in this sample water, inject ozone, the ozone-depleting amount of coming calculation sample water according to the discharge of the injection ozone amount of this moment and the ozone concn of discharging and dissolved ozone concn and then sample, decide the injection rate of injecting processed water according to calculating consumption try to achieve and the processed water flow that imports ozone contact tank and ozone assimilated efficiency thus, carry out ozonize in the ozone contact tank according to this ozone injection rate.
In order to implement ozonize of the present invention, be provided with a part that flows into the processed water in the ozone contact tank extract out as the device of sample water and, in sample water, inject ozone device and, detect the injection rate of this moment, the ozone concn of discharging, the device of dissolved ozone concn and sample water flow.And, the ozone concn of the injection ozone amount of water and discharging and dissolved ozone concn and sample water flow come the ozone-depleting amount of calculation sample water per sample, and then, calculate the device of the ozone injection rate of injecting processed water according to the ozone-depleting amount of this sample water and processed water flow and ozone assimilated efficiency.
(1) calculating of the ozone consumption (Oc) of sample processed water
Oc＝[{G(Cg1-Cg2}/L-CW1 (1)
In the formula, G: the flow (l/min) that contains ozone gas
Oc: the ozone-depleting amount (mg/l) of processed water
Cg1: inject the sample water ozone concn that contains ozone gas (mg/l) before
Cg2: be discharged to the discharging ozone concn (mg/l) in the gas phase
L: the flow of sample water (l/min)
CW1: dissolved ozone concn (mg/l)
(2) calculating of the ozone assimilated efficiency of liquid phase:
Ozone assimilated efficiency (η)=(Cg1-Cg2)/Cg1}x (%) ... (2)
(3) calculating of the ozone injection rate of injection ozone contact tank
The ozone injection rate: (Io)=(Oc * Q)/η ... (3)
In the formula, Q: processed water flow
And the ozone input rate in the processed water calculates by following formula (4)
Ozone input rate=Io/Q ... (4)
If the ozone that the injection rate of trying to achieve with formula (3) is carried out in the ozone contact tank injects, then because therefore the ozone injection rate that this ozone injection rate is necessary irreducible minimum often can not detect dissolved ozone.However, though no problem on the ozonize, if in fact can not detect the dissolved ozone concn, then whether really remain worried without a doubt for ozonize.Therefore, in the ozonize of reality, preferably the target value with the dissolved ozone concn is set in certain scope, with the set(ting)value and the ozone-depleting amount Oc addition of this dissolved ozone concentration, presses following formula (5) decision ozone injection rate.
The ozone injection rate (Oc+Ko) * Q}/η ... (5)
In the formula, Ko: the set(ting)value of dissolved ozone concentration (mg/l)
When carrying out ozonize, detect dissolved ozone concentration, make it to be in the allowed band if this dissolved ozone concentration outside allowed band, then preferably increases or reduces the ozone injection rate from ozone contact tank by the inventive method.
Even if increase and decrease ozone injection rate, still outside the allowed band of dissolved ozone concentration, this expression ozonizer breaks down, or it is blocked to lead to the pipeline of ozonize groove from ozonizer, or dissolved ozone concentration meter breaks down etc., therefore solve after should ascertaining the reason, or stop the operation of ozone treatment apparatus.
Owing to have many ozonizers, and in ozone contact tank, inject ozone by these ozonizers, therefore when wherein any one ozonizer causes dissolved ozone concentration not to be returned to allowed band because of breaking down, then can keep ozone and inject by remaining ozonizer.
To the injection of the ozone of sample water,, during in ozone contact tank, handling, should carry out continuously by the calculating of formula 1 or formula 3.And, will compare with previous value based on the ozone-depleting value that formula 1 calculates, if its deviation in the range of set value of dissolved ozone concentration, then is advisable not go to control the ozone injection rate that is injected in the ozone contact tank.If change the ozone injection rate continually, be easy to generate wave phenomenon, therefore to avoid, when the ozone-depleting amount and last time numerical value deviation also wish not change the ozone injection rate when little.
So, among the present invention, the ozone that reinjects processed water was extracted its part out before importing ozone contact tank as sample water after, and obtain processed water is handled necessary injection rate, even so the water quality of processed water rapid variation takes place also can tackle.
Fig. 1 is the schema of the ozone-depleting amount determining device system of expression one embodiment of the invention.
Fig. 2 is the system flowchart of the ozone injection control method of expression one embodiment of the invention.
Fig. 3 is the notes journey figure of treatment system in the water purification field of expression one embodiment of the invention.
Fig. 4 is the part details drawing of system shown in Figure 1 schema.
Fig. 5 is the functional diagram of part details drawing shown in Figure 4.
Embodiment
One embodiment of the present of invention below are described with reference to the accompanying drawings.
At first, according to Fig. 3 the overall formation that is fit to adopt water purification of the present invention field water treatment system is described.Among Fig. 3, the former water RW that takes from river etc. comes the settling pit (not shown) through the aqueduct (not shown), herein, remove the big sand of particle diameter etc. after, import in the well (not shown).Thereafter, former water RW imports in the medicine mixing pit 1, herein, with Tai-Ace S 150 or PAC (poly aluminium chloride) flocculation agent 2 of etc.ing, and then with after alkaline agent 3 as flocculant aid mixes rapidly, is sent to throw out formation pond 4.
Form in the pond 4 at throw out, the micropartical among the former water RW condenses and becomes small throw out, after stirring with flocculator 5, promotes its growth., will contain the cohesion water that generates big particle diameter throw out import in settling tank 6, carry out the settlement separate of throw out herein thereafter.
Make the settlement separate precipitation water SW of throw out through said process, thereafter, inject the processed water W of process object as ozone
0Be imported in the contact tank 7.In ozone contact tank 7, inject ozone gas OG by ozonizer 8.And then be described in detail it, and after the moisture among the unstripped gas RA (air or oxygen) is removed with dehumidifier 9, ozone supply producer 8.The 10th, with the gas blower of unstripped gas RA ozone supply producer 8.Oxygen is imported in the ozone contact tank 7 from the diffuser 12 with many aperture (not shown)s by ventpipe 11 as gas ozoniferous by ozonize in ozonizer 8.
From the concentration of the ozone gas of above-mentioned ozonizer 8, by controller 13, high- frequency converter 14 and 15 controls of high-voltage variable parallel operation.Just, apply high-frequency high-voltage by high-frequency converter 14 and high voltage transformer 15 to the discharge part (not shown) from power supply.And, the gas flow that infeeds ozonizer 8 is defined as one regularly, therefore the concentration of ozone gas of generation improves concentration of ozone gas by improving impressed voltage and frequency by the discharge power decision of discharge part.And impressed voltage and allocation are a timing, and concentration of ozone gas is by the gas flow decision that infeeds discharge part, if reduce gas flow, then concentration of ozone gas will uprise.Therefore, in the present embodiment, make the certain back of impressed voltage by high-frequency converter 14 controlled frequencies, control the ozone generating capacity thus, but also can control the flow of base feed gas, the control method of ozone generating capacity has no particular limits.
On the top of ozone contact tank 7, dispose and contain the spray trap 16 that the moisture among the ozone exhaust gas EG is removed what ozone contact tank 7 was discharged, be provided with ozone disaggregating treatment groove 17 at the downstream side of this spray trap 16.In this treatment trough 17, be filled with ozone decomposition catalyst 18.As this ozone decomposition catalyst 18, can adopt MnO
2, gac, at least a element, oxide compound or the composite oxides of Ni and Fe etc.But, the catalyzer that uses is not had special qualification.
In the follow-up workshop section of ozone contact tank 7, be provided with the gas blower 19 that suction contains ozone exhaust gas EG and makes it to discharge.
Downstream side at ozone contact tank 7 disposes biological activated carbon pond 20.Filling gac 21 in this biological activated carbon pond 20, the treating water TW of process ozone contact tank 7 and ozone delaying basin 7A is imported into.Filling gac 21 back water flowings originally, the surface of this gac 21 or the inner microorganism that exists are few, but along with the process of time, cultivate and the microorganism of breeding in the surface or inner existence of this gac 21.The principal item of microorganism can be enumerated Rhodopseudomonas (Pseudomonas) etc.
From the treating water TW of ozone contact tank 7, the effect by mentioned microorganism herein, in ozonize inexpungible ammonium-nitrogen by nitrated removing in, because of the dissolved organic matter that ozonize is degraded is also removed by metabolism.The treating water AW from biological activated carbon pond 20 through so handling delivers to the distribution reservoir (not shown) thereafter.Biological activated carbon pond 20 does not illustrate in the present embodiment, but also can use a part for the treatment of water from biological activated carbon pond 20 to carry out backwash as required, removes superfluous microorganism attached to activated carbon surface.
Supply with the dissolved ozone concentration of the treating water TW in biological activated carbon pond 20, measured by dissolved ozone concentration meter 61, this variable is input in the ozone injection control device 60.The formation of ozone injection control device 60 is according to from the measured value of the ozone-depleting amount determining device 22 of measuring the ozone amount that is consumed in the ozone contact tank 7 and the measured value of dissolved ozone concentration meter 64, to control the ozone injection rate.
The 22nd, the ozone-depleting amount determining device, this device is measured the processed water W that flows in the ozone contact tank 7
0Ozone-depleting amount Oc.
Fig. 1 has shown its details.In ozone contact reaction groove 23, gather the processed water W that becomes the ozonize object from usefulness sampling pumps such as settling tank 6 outlets 24
0A part be imported into as sample water S.And then, in this ozone contact reaction groove 23, inject ozone gas G with normality from ozonizer 25.Inlet side at ozonizer 25 disposes moisture trap 26, and this moisture trap 26 is removed the moisture in the unstripped gas (air or oxygen) that infeeds ozonizer 25, with the dried feed gas ozone supply producer 25 of dew point step-down.And, in the present embodiment, will infeed in the ozonizer 25 as the air of unstripped gas by strainer 27 usefulness air pumps 28.In this case,, also can use the air of oxygen or oxygen enrichment, unstripped gas is not had special qualification as unstripped gas.
Outlet side at ozonizer 25 disposes ozone concn meter 29.This ozone concn meter 29 is measured the concentration C g1 of the ozone gas G that injects the ozone contact reaction groove.This ozone concn meter 29 for example be the concentration of measuring ozone gas G by diaphragm type polarograph (Port-テ ロ グ ラ Off) method of electrode or the method for ultraviolet radiation absorption formula, but the measuring principle of ozone concn meter is unqualified.
On ozonizer 25, be connected with the controller 30 of control ozone generation concentration.In the present embodiment, control ozone generation concentration by the impressed voltage of regulating on the discharge part (not shown) that constitutes ozonizer 25.
Inject the flow G of the ozone gas in the ozone contact reaction groove 23, regulate with flow stabilizing valve 31, the ozone gas that is set in the regulation flow is injected by diffuser 40A by under meter 32 backs.The flow of the sample water S that gathers with sampling pump 24 is regulated with steady flow control valve 33.And, be set in the sample water S of regulation flow, by infeeding in the ozone reaction groove 23 behind the under meter 34.Import the sample water S of ozone contact reaction groove 23, be relative current to contacting and flow down with ozone with the air-flow of the ozone gas that imports simultaneously.
Outlet side at ozone contact reaction groove 23 is provided with dissolved ozone concentration meter 35, and this dissolved ozone concentration meter 35 is measured the dissolved ozone concentration C W1 of the treating water TW1 after ozone gas injects.This dissolved ozone concentration meter 35 can adopt the ozone concn meter as above-mentioned diaphragm type polarograph electrode method or ultraviolet radiation absorption formula etc., but its method does not have particular determination.Measure dissolved ozone concentration C W1 in the outlet of ozone contact reaction groove 23 in the present embodiment, but also can measure the dissolved ozone concentration in the ozone contact reaction groove 23, if after ozone injects sample water S, then where can both measure.
From the treating water TW1 that contains dissolved ozone of ozone contact reaction groove 23, the dissolved ozone that flows into is thereafter removed in the groove 36.In dissolved ozone is removed groove 36,, import air by pneumatic pump 28 and make it the gas that looses in order to remove dissolved ozone.Just, by ventpipe 37, flow control valve 38 and under meter 39 were imported by diffuser 40B in the dissolved ozone removal groove 36 from the air of air pump 28 afterwards, in an embodiment of the present invention, have by air pump 28 and infeed the unstripped gas body source of ozonizer 25 and remove the supply gas source that dissolved ozone is used, but can be provided with independently, the quantity of pump etc. does not have special qualification yet.
Each groove 23 and 36 gas phase portion are interconnected by vent pipe 41.And, contain ozone emission gases Eg by what the liquid phase of above-mentioned each groove 23,36 entered gas phase, be discharged to outside the system by this vent pipe 41.Contain ozone emission gases Eg and be aligned under the situation outside the system, discharge, pass catalyzer 42 and ozone is decomposed by the ozone decomposition catalyst 42 that is configured in the vent pipe 41.
The 43rd, ozone concn meter, this densitometer are used for measuring the ozone concn Cg2 in row's ozone gas of being discharged by ozone contact reaction groove 23.Though do not illustrate in the present embodiment,, behind the moisture of removing with the droplet separator(-ter) in the gas, flow into ozone concn meter 43 from row's ozone gas Eg of ozone contact reaction groove 23.
The 50th, the ozone that calculates the ozone injection rate Oc that injects ozone contact tank 7 injects calculating device, and this calculating device has following formation.
Its formation is described, the 51st, counter, in this counter, the concentration of ozone gas Cg1 of injection ozone contact reaction groove measures the back by ozone concn meter 29 and is transfused to.And then, in this counter 51, after measuring with ozone concn meter 43, the ozone concn Cg2 among the row's ozone gas Eg that is discharged by ozone contact reaction groove 23 is transfused to.And then the flow G that injects the ozone gas of ozone contact reaction groove 23 measures the back input with under meter 32.And then in this counter 51, input is with the flow L that infeeds the sample water S that ozone contact reaction groove 23 goes of under meter 34 mensuration.And, in this counter 51, input by dissolved ozone concentration meter 35 measure from the dissolved ozone concentration C W1 among the treating water TW1 of ozone contact reaction groove 23.This result is to obtain the processed water W of sampling in this counter 51 according to following formula (6)
0Ozone consumption Oc (mg/l).
Qc＝{G(Cg1-Cg2)/L}-CW1 …(6)
The 52nd, counter, the ozone-depleting amount Oc that is tried to achieve by aforementioned calculation device 51 is transfused to.And, try to achieve according to following formula (7) with deviation ± Δ Oc of the ozone-depleting amount Oc ' that tried to achieve the last time that is stored (below, be defined as Δ Oc).
ΔOc＝Oc’-Oc……(7)
The 53rd, determinant, the deviation delta Oc of the ozone-depleting amount that input is tried to achieve by aforementioned calculation device 52 in this determinant.And then, the deviation range De (Δ Oc ,+Δ Oc) that input is set in this determinant 53.Consequently, can judge whether the deviation delta Oc that is input in the determinant 53 is within the setting range De (Δ Oc＜Δ Oc＜+Δ Oc), under the situation in scope, the ozone-depleting amount Oc ' that tried to achieve the last time of selected other approach input.On the other hand, under the situation in scope, do not export again behind the selected ozone-depleting amount Oc that newly tries to achieve.
The 54th, counter is tried to achieve ozone assimilated efficiency η by this counter.Just, in this counter, input infeeds ozone concn Cg1 in the ozone contact reaction groove 23 by what ozone concn meter 29 was measured, and then the ozone concn Cg2 among the ozone gas Eg that discharged by ozone contact reaction groove 23 of input.Consequently, with this counter 54, can try to achieve assimilated efficiency η according to following formula (2).
η(％)＝{(Cg1-Cg2)/Cg1}×100…(2)
The 55th, try to achieve and send into processed water W
0The counter of necessary ozone injection rate, input is tried to achieve by aforementioned calculation device 51 and by the selected ozone consumption Oc of determinant 53 in this counter.And then input is by the processed water W of the ozonize object in the inflow ozone contact tank 7 of under meter 56 mensuration in this counter 55
0Flow Q.And, the ozone assimilated efficiency η that input is tried to achieve by aforementioned calculation device 54.Consequently, with this counter 55, can try to achieve injection ozone contact tank 7 needed necessary ozone injection rate I according to following formula (8)
0
I
0＝(Oc×Q)/η…(8)
To obtain necessary ozone injection rate I after the ozone assimilated efficiency η input
0, this is because be injected into processed water W
0In ozone can not be absorbed fully, some is discharged in the gas phase as useless ozone gas, so will compensate this part.In the embodiments of the invention, as mentioned above, obtain according to the difference of injection ozone concn Cg1 that is injected into ozone contact reaction groove 23 and discharge ozone concn.In such cases, can also try to achieve assimilated efficiency η according to above-mentioned (7) formula, be entered into again in the counter 55 by the injection ozone concn that is injected into ozone contact tank 7 with from the difference of row's ozone concn of contact tank 7.And, can also import the ozone assimilated efficiency η of prescribed value, be not limited in one embodiment of the present of invention.
The 57th, counter, the necessary ozone injection rate I that input is tried to achieve by above-mentioned arithmetical unit 55 in this counter
0And then input ozone injects the target value K of the dissolved ozone concentration after handling
0And then, the flow Q of input ozone assimilated efficiency η and processed water.Consequently, obtain according to following formula (9) by this counter 57 and add dissolved ozone concentration target value K
0Ozone injection rate Ij.
Ij+I
0+(K
0×Q)/η…(9)
Add above-mentioned dissolved ozone concentration K
0Ozone injection rate Ij, also can obtain according to following formula (10), try to achieve and add dissolved ozone concentration target value K
0The method of ozone injection rate be not limited only to the method for present embodiment.
Ij＝{(Oc+K
0)Q}/η…(10)
Ozone injection rate Ij by counter 57 is tried to achieve carries out under the situation of revisal in the following output according to revisal ozone injection rate Ia, as by the ozone injection rate Ic of revisal, as shown in Figure 2, is input in the counter 58.On the other hand, ozone injection rate Ij is not carried out under the situation of revisal, directly import as ozone injection rate Ij.And then in this arithmetical unit 58, input is obtained the generation ozone concn Gc that is produced by ozonizer 8 by the gas flow F of the ozonizer 8 of under meter 59 mensuration according to following formula (11).
Gc＝Ij/F ……(11)
The generation ozone concn Gc that is tried to achieve by counter 58 is passed in the controller 13 of ozonizer 8.And the controller 13 of ozonizer 8 is controlled high-frequency converter 14 etc. according to this generation ozone concn Gc of input, and control is from the concentration of ozone gas Cg of ozonizer 8.Ozone concn Cg from ozonizer 8 is measured by ozone concn meter 60, and this measured value is fed in controller 13, and the concentration of ozone gas Cg of value controls like that according to the rules.And the ozone gas OG with normality is injected into the processed water W that imports ozone contact tank 7
0In.
The 61st, dissolved ozone concentration meter is used to be determined at processed water W
0The dissolved ozone concentration DO for the treatment of water TW behind the middle injection ozone
3, this dissolved ozone concentration meter detects whether contain dissolved ozone in treating water TW.
The 62nd, the dissolved ozone consistency controller, when this controller was in outside the allowed band in dissolved ozone concentration, control ozone injection rate made it in allowed band.
This dissolved ozone consistency controller 62, as Fig. 4 and shown in Figure 5, by comparer 63,65, counter 64,66 and calculating meter 67 constitute.
Describe according to Fig. 4 and Fig. 5.The dissolved ozone concentration DO3 that is measured by above-mentioned dissolved ozone concentration meter 61 imports in the comparer 63 that constitutes controller 62 as output valve.And, within the permission upper lower limit value Ds (higher limit Dm, lower value Dn) of default dissolved ozone concentration, more whether satisfy lower value Dn, be lower than when its concentration under the situation of lower value Dn, obtain deviation+Δ DO3 of dissolved ozone concentration DO3 and lower value Dn with counter 64.
On the other hand, dissolved ozone concentration DO3 is higher than under the situation of lower value, and this dissolved ozone concentration DO3 is input in another comparer 65, and herein, relatively whether dissolved ozone concentration DO3 is lower than higher limit Dm.When dissolved ozone concentration DO3 is higher than under the higher limit Dm situation, obtain deviation-Δ DO3 of dissolved ozone concentration DO3 and higher limit Dm with counter 66.
The deviation of above-mentioned each dissolved ozone concentration ± Δ DO3 is input in the counter 67 that constitutes dissolved ozone consistency controller 62, and then input flows to the processed water W in the ozone contact tank 7 in this counter 67
0Flow Q and ozone assimilated efficiency η, obtain revisal ozone injection rate Ia according to following formula (12).
Ia＝(±ΔDO3×Q)η…(12)
The revisal ozone injection rate Ia that is tried to achieve by aforementioned calculation device 67 is input in the arithmetical unit 68, formerly Shuo Ming ozone injection rate Ij according to following formula (13) by revisal.
Ic＝Ia+Ij ……(13)
In the formula, Ic is the ozone injection rate with revisal ozone injection rate Ia revisal.
The 68th, comparer, the dissolved ozone concentration DO3 that input is measured by dissolved ozone concentration meter 61 in this comparer, and then the permission upper lower limit value Ds of input dissolved ozone concentration.Allow upper lower limit value Ds and dissolved ozone concentration DO3 to compare with 68 pairs of this comparers, even control the dissolved ozone concn with above-mentioned dissolved ozone consistency controller 62, in the time of outside dissolved ozone concentration is in above-mentioned permission upper lower limit value Ds, also can send the signal output that stops ozonizer 8.Stopping of ozonizer 8 both can be automatic, also can be manual.
Below the action that has as above the device that constitutes is described.
At first, inject the processed water W of process object as ozone
0A part, import in the ozone-depleting amount determining devices 22 by sampling pump 24.Herein, inject ozone gas with normality Cg1 and flow G by ozonizer 25, thus, processed water W
0The middle composition of ozone that consumes is just by ozone oxidation.
On the other hand, the treating water TW1 after ozone injects is in importing dissolved ozone removal groove 36 thereafter.Herein, by means of the air that air pump 28 imports, make the dissolved ozone that contains among the treating water TW be discharged into the gas phase from liquid phase, the treating water TW that does not contain dissolved ozone then is discharged into outside the system.
As mentioned above, at processed water W
0In inject under the situation of ozone, to the ozone concn Cg2 of row's ozone gas Eg of being injected into the ozone concn Cg1 among the sample water S and discharging from sample water S, and then be that the flow L that injects ozone gas flow G and sample water S measures.And the dissolved ozone concentration C W1 of the treating water TW1 after ozone injected measures.Consequently, by constituting the counter 51 of ozone injection rate calculating device 50, obtain the treating water W of sampling according to above-mentioned (6) formula
0Ozone-depleting amount Co.And be input in the counter 55 this ozone-depleting amount Co back by becoming the processed water W that injects process object
0The relation of flow Q, obtain the processed water W that has added behind the ozone assimilated efficiency η according to above-mentioned (8) formula
0In necessary ozone injection rate I.
The necessary ozone injection rate I that tries to achieve as stated above
0, be input to then in the counter 58 of the ozone generation concentration Gc that obtains in the ozonizer 8, herein, controller 13 according to the relation of gas flow F, control is injected into processed water W
0Generation ozone concn Gc, the ozone gas OG that the ozone concn of necessity and gas flow G are formed injects processed water W
0In.
As mentioned above, at processed water W
0In when injecting necessary ozone amount, the change of the ozone-depleting amount Oc that records is little, make its with last time measured value deviation under the situation within the setting deviation D e, the ozone-depleting amount Oc of measured value obtained injection rate Io according to last time.On the other hand, set under the deviation D e situation in addition, can calculate necessary ozone injection rate I according to the ozone-depleting amount Co of new mensuration when being in
0
And, inject processed water W
0In necessary ozone injection rate I
0When trying to achieve as stated above, at this necessity ozone injection rate I
0In add the target value K of dissolved ozone concentration
0Ozone injection rate Ij, obtain the back according to above-mentioned (9) formula with counter 57 and inject processed water W
0In.
On the other hand,, measure the dissolved ozone concentration DO3 that ozone injects the treating water TW after handling, obtain revisal ozone injection rate Ia and make dissolved ozone concentration be in the scope that allows bound Ds with dissolved ozone consistency controller 62.And, after the ozone injection rate Ij addition that this revisal ozone injection rate Ia and above-mentioned other approach are tried to achieve, according to the ozone injection rate after the revisal at processed water W
0The middle ozone that injects.
As mentioned above, try to achieve ozone-depleting amount in advance according to the present invention as the processed water of ozonize object, ozone injection rate in the processed water that will be tried to achieve by this ozone-depleting amount is injected in the processed water, even therefore also can inject aptly as the organic concentration drastic change of the ozone-depleting composition in the processed water and can not make the ozone injection rate too not enough.
And, owing to obtain the ozone-depleting amount, in this ozone-depleting amount, obtain the ozone injection rate that is injected in the processed water again after the target value of adding dissolved ozone concentration, therefore the treating water after ozone injects processing detects dissolved ozone concentration at ordinary times, can judge inject in the ozone contact tank of reality whether not enough at an easy rate.
Claims (5)
1. ozone treatment method, it is characterized in that, processed water is imported ozone contact tank to carry out in the method for ozonize, extract the part of the processed water before the guiding ozone contact tank out back as sample water and inject ozone, injection ozone amount in the time of thus and row's ozone concn and dissolved ozone concentration and then sample water flow, calculate the ozone-depleting amount of sample water, decide the ozone injection rate of injecting above-mentioned processed water according to processed water flow and ozone assimilated efficiency in this ozone-depleting amount and the inflow ozone contact tank, carry out ozonize in the ozone contact tank according to this injection rate, wherein said ozone injection rate is by following formula (1)-(3), (5) calculate
Oc＝[{G(Cg1-Cg2)}/L]-CW1 (1)
Wherein G is the flow that contains ozone gas, and unit is l/min; Oc is the ozone-depleting amount of processed water, and unit is mg/l; Cg1 injects the sample water ozone concn that contains ozone gas before, and unit is mg/l; Cg2 is the discharging ozone concn that is discharged in the gas phase, and unit is mg/l; L is the sample water flow, and unit is l/min; CW1 is the dissolved ozone concn, and unit is mg/l;
Ozone assimilated efficiency (η)=(Cg1-Cg2)/Cg1}x (%) ... (2)
The ozone injection rate: (Io)=(Oc * Q)/η ... (3)
Wherein Q is the processed water flow;
Perhaps, the target value of dissolved ozone concn is set in certain scope,, presses following formula (5) decision ozone injection rate the set(ting)value and the ozone-depleting amount Oc addition of this dissolved ozone concentration,
Ozone injection rate (Io)=(Oc+Ko) * Q}/η ... (5)
Wherein Ko is the set(ting)value of dissolved ozone concentration, and unit is mg/l.
2. method according to claim 1, it is characterized in that, according to ozone being injected into the above-mentioned ozone injection rate of trying to achieve in the sample water, with inject ozone contact tank after the dissolved ozone injection rate addition of the adding dissolved ozone concentration in ozone contact tank exit, and detect from whether containing dissolved ozone in the treating water of above-mentioned ozone contact tank.
3. method according to claim 2 is characterized in that, when the dissolved ozone concentration from the treating water of ozone contact tank is in beyond the scope of permission, increases or reduces the ozone injection rate its concentration is entered within this scope.
4. method according to claim 3 is characterized in that, even outside increasing or reduce the scope that dissolved ozone concentration is still also allowing after the above-mentioned ozone injection rate time, ends ozonize.
5. method according to claim 2, it is characterized in that, when when the deviation of the ozone-depleting amount of ozone being injected the processed water that above-mentioned sample water tries to achieve and above-mentioned ozone-depleting amount of trying to achieve is outside the allowed band of dissolved ozone concentration, increase or reduce the injection rate that is injected in the ozone contact tank.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31030994A JP3184948B2 (en) | 1994-12-14 | 1994-12-14 | Ozone injection control method and device |
| JP310309/94 | 1994-12-14 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN01120828A Division CN1320565A (en) | 1994-12-14 | 2001-05-29 | Ozone treatment apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1133266A CN1133266A (en) | 1996-10-16 |
| CN1087714C true CN1087714C (en) | 2002-07-17 |
Family
ID=18003678
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95120816A Expired - Fee Related CN1087714C (en) | 1994-12-14 | 1995-12-13 | Ozone treatment method and device |
| CN01120828A Pending CN1320565A (en) | 1994-12-14 | 2001-05-29 | Ozone treatment apparatus |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN01120828A Pending CN1320565A (en) | 1994-12-14 | 2001-05-29 | Ozone treatment apparatus |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3184948B2 (en) |
| KR (1) | KR960022278A (en) |
| CN (2) | CN1087714C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100367219B1 (en) * | 1999-02-09 | 2003-01-14 | 엘지건설 주식회사 | An equipment of advanced drinking water treatment for the control of micro-pollutants |
| JP2006223935A (en) * | 2005-02-15 | 2006-08-31 | Hitachi Ltd | Apparatus and method for producing reusable water |
| CN102267687B (en) * | 2010-06-07 | 2013-05-08 | 西安费斯达自动化工程有限公司 | Control method of adaptable intelligent ozone generator |
| CN102040276B (en) * | 2010-12-28 | 2012-02-01 | 哈尔滨工业大学深圳研究生院 | Ozone contact tank and ozone contact method |
| WO2016121618A1 (en) * | 2015-01-30 | 2016-08-04 | 三菱電機株式会社 | Water treatment apparatus and water treatment method |
| CN107720900A (en) * | 2017-10-30 | 2018-02-23 | 文世杰 | A kind of method for treating water of washing machine water processing unit |
| CN110412233A (en) * | 2019-08-28 | 2019-11-05 | 上海铱钶环保科技有限公司 | Different quality is quantitative determined to the method and apparatus of ozone-depleting |
| CN114229990A (en) * | 2021-12-28 | 2022-03-25 | 北京首创生态环保集团股份有限公司 | Ozone adding control system and method for ozone catalytic oxidation process |
-
1994
- 1994-12-14 JP JP31030994A patent/JP3184948B2/en not_active Expired - Fee Related
-
1995
- 1995-12-13 KR KR1019950049109A patent/KR960022278A/en not_active Application Discontinuation
- 1995-12-13 CN CN95120816A patent/CN1087714C/en not_active Expired - Fee Related
-
2001
- 2001-05-29 CN CN01120828A patent/CN1320565A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08164396A (en) | 1996-06-25 |
| JP3184948B2 (en) | 2001-07-09 |
| CN1133266A (en) | 1996-10-16 |
| CN1320565A (en) | 2001-11-07 |
| KR960022278A (en) | 1996-07-18 |
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