CN102372411A - Dewatering method and dewatering apparatus for organic slude - Google Patents
Dewatering method and dewatering apparatus for organic slude Download PDFInfo
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- CN102372411A CN102372411A CN2011102442050A CN201110244205A CN102372411A CN 102372411 A CN102372411 A CN 102372411A CN 2011102442050 A CN2011102442050 A CN 2011102442050A CN 201110244205 A CN201110244205 A CN 201110244205A CN 102372411 A CN102372411 A CN 102372411A
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Abstract
The present invention provides a control method for an inorganic coagulant adding amount under an inorganic coagulant post-addition method, a control method for a condensing clod, a dewatering method for a machine sludge and a dewatering apparatus for the dewatering method. The dewatering method comprises a condensing process (4), in which a high molecular coagulant (2) is added in an organic sludge (1), making the sludge condense and further forming a condensing sludge; a concentrating process for concentrating the formed condensing sludge; an inorganic coagulant adding process (7) for adding an inorganic coagulant in the concentrated condensing clod; a dewatering process (9) for mechanically dewatering the concentrated condensing clod after the inorganic coagulant is added, and/or an adjusting process (6) for adjusting the size of the concentrated condensing clod to be in a range of between 0.5m and 10mm. In the inorganic coagulant adding process (7), an inorganic coagulant is added, such that the condensing clod after the inorganic coagulant is added has a pH value of between 3 and 6, or the pH value of the dewatered filtrate is between 3 and 6.
Description
Technical field
The present invention relates to the dewatering and the dewatering unit of organic sludge.Be specifically related to following dewatering and dewatering unit: it is to use polymer coagulant and inorganic coagulant; Organic sludge is carried out the method and the device of processed, wherein, utilize polymer coagulant that organic sludge is condensed; Concentrate the mud after condensing; Add inorganic coagulant in the mud after concentrating, carry out mechanical dehydration, reduce the dewatering and the dewatering unit of the moisture of the dehydrated sludge cake that obtains.
Background technology
In recent years, require to reduce the waste amount, reduce carrying capacity of environment.The dehydration technique of the organic sludge of discharging from sewage disposal device is of crucial importance, hopes to develop the dewatering of effective organic sludge.In the past; When organic sludge is dewatered; The general use " utilize polymer coagulant to make after mud condenses; to carry out the method for mechanical dehydration " (single-fluid process), " in mud, add after the inorganic coagulant, utilize polymer coagulant to condense, carry out the method for mechanical dehydration again " (inorganic coagulant elder generation additive process).
There is " utilize polymer coagulant to make after mud condenses, carry out that machinery concentrates or gravity concentrates, add inorganic coagulant again, carry out the method for mechanical dehydration " (additive process after the inorganic coagulant) in other dewaterings about organic sludge.Additive process is suitable for M basicity and (is meant the basicity of measuring as indicator with methyl red (methyl red) or tropeolin-D (methyl orange) (alkalinity) after this inorganic coagulant.Be also referred to as total alkalinity) dehydration of high organic sludge.In inorganic coagulant elder generation additive process, because the alkaline components in the organic sludge liquid consumes inorganic coagulant, so need a large amount of inorganic coagulants.On the other hand, after inorganic coagulant, in the additive process, concentrate the removal alkaline components, therefore can reduce the consumption of inorganic coagulant through mud.In addition, compare with single-fluid process, additive process is effective to the reduction of moisture in the dehydrated sludge cake after the inorganic coagulant.
About with inorganic coagulant after the relevant technology of additive process, known have a following prior art.Jp patent publication spy opens the dewatering that discloses a kind of organic sludge in the clear 61-149300 communique; It is characterized in that; Comprise following operation: the 1st operation after the interpolation mixed-cation is organic high-molecular coagulant in organic sludge, generates clod while stir this mud; The 2nd operation is carried out gravity filtration to this mud; The 3rd operation is added after the mixed molysite in the mud after this gravity filtration, carries out pressurizing and dehydrating.In addition, jp patent publication spy opens the dewatering that discloses a kind of digested sludge in the flat 9-24400 communique, and it comprises: in digested sludge, add cationic polymers and carry out coagulation treatment operation; Mud after condensing is carried out the operation of gravity dehydration; Add inorganic coagulant in the mud behind gravity dehydration and carry out modified operation; The operation of adding amphiphilic polymers and utilizing water extracter to dewater in the mud after modified.But, do not have the record relevant in these prior aries with the optimization of inorganic coagulant addition, more particularly do not exist with add inorganic coagulant after the relevant record of pH of parting liquid of pH or dehydration of the mud that condenses.In addition, in these prior aries, do not exist with concentrate after the relevant record of optimization of mud, more particularly do not exist with concentrated after the big or small relevant record of block of mud.
About the technology relevant with pH control, known have a following prior art.Jp patent publication spy opens the dewatering that discloses a kind of organic sludge in the flat 4-284900 communique; It adds organic coagulants and carries out after granulation concentrates in organic sludge; Utilize the mechanical dehydration machine that it is dewatered, it is characterized in that, add inorganic coagulant so that the pH of organic sludge becomes after 3.0～5.0 scopes; Add organic coagulants and carry out granulation and concentrate; The SS (suspended solids, suspended solids) that injects with respect to the mud of carrying to the transfer lime pipe is the inorganic coagulant of 10～15 weight %, and the sludge slurry after this transfer lime concentrates granulation flows to the mechanical dehydration machine.In addition; Jp patent publication spy opens and discloses in the flat 10-165999 communique in a kind of processed supplying with the pH inflation method of mud; It is characterized in that; When injecting inorganic coagulant in the mud that is being supplied to water extracter,, measure the pH that supplies with mud on the mud supply-pipe of the connecting portion of the supply line of inorganic coagulant and the middle part between the water extracter, the pH appearance being set; Automatically control the output of the supply pump of carrying inorganic coagulant according to this pH, above-mentioned connecting portion is the supply line of inorganic coagulant and connecting portion from the mud supply-pipe of mud to water extracter that supply with.
In addition; Jp patent publication spy opens the dewatering that discloses a kind of mud in the flat 8-173999 communique, adds the 1st condensing agent in its mud that in effluent sewerage is handled, produces, and the p H of mud is adjusted to suitable pH; In this mud, add the 2nd condensing agent afterwards and mix; The mud that condenses that obtains is supplied to water extracter and dewaters, it is characterized in that above-mentioned the 1st condensing agent is the polyiron sulfate condensing agent; Above-mentioned suitable pH is 4.0～7.0, and above-mentioned the 2nd condensing agent is the cationic polymer coagulant.But, the relevant technology of inorganic coagulant elder generation's additive process that these prior aries are and before adding polymer coagulant, add inorganic coagulant, be different from inorganic coagulant after the relevant the present invention of additive process.Therefore, disclosed pH is applicable to additive process after the inorganic coagulant in these prior aries, can not carry out optimum control to the addition of inorganic coagulant.
About the technology relevant with the clod diameter, known have a following prior art.Jp patent publication spy opens and discloses a kind of dehydration treatment method in the 2009-165964 communique; It is characterized in that; Add condensing agent in the mud that in sewage disposal device, produces and carry out 1 time coagulation treatment; Mud to coagulating after agent is handled for 1 time carries out the high density concentration, add condensing agent in the mud after concentration and carry out 2 times coagulation treatment, the high concentration sludge after coagulation treatment is implemented processed to 2 times again.Also record: forming the clod of 2mm～4mm size for 1 time in coagulation treatment, 2 times coagulation treatment in the clod of formation 0.5mm～3mm.Also the record: 1 time coagulation treatment in polymer coagulant more effective, 2 times coagulation treatment in polymer coagulant more effective, also can use inorganic coagulants such as polyiron sulfate.But, do not have the record relevant in these prior aries with the optimization of inorganic coagulant addition, more specifically with do not exist with add inorganic coagulant after the relevant record of pH of parting liquid of pH or dehydration of the mud that condenses.
Among the above-mentioned prior art relevant with pH control, jp patent publication spy opens in the flat 4-284900 communique, adds inorganic coagulant, the moisture of reduction dehydrated sludge cake so that organic sludge pH becomes the mode of 3.0～5.0 scope.In addition, open in the flat 10-165999 communique the jp patent publication spy, the pH of the mud after the inorganic coagulant is injected in measurement, and the output of the supply pump of inorganic coagulant is carried in control automatically, the usage quantity of minimizing inorganic coagulant.In addition, open in the flat 8-173999 communique the jp patent publication spy, add polyiron sulfate in the mud that in effluent sewerage is handled, produces, the pH of adjustment mud is 4.0～7.0, reduces the moisture of dehydrated sludge cake.But, the relevant technology of inorganic coagulant elder generation's additive process that these prior aries are and before adding polymer coagulant, add inorganic coagulant, be different from inorganic coagulant after the relevant the present invention of additive process.Disclosed pH is applicable to additive process after the inorganic coagulant in these prior aries, can not carry out optimum control to the inorganic coagulant addition.Its reason is; After inorganic coagulant in the additive process; Concentrate removing through mud in the mud after the solvability composition, add inorganic coagulant, so the sludge components of the sludge components when adding inorganic coagulant with interpolation inorganic coagulant in inorganic coagulant elder generation additive process the time is different.Especially; Under the situation of the high organic sludge of M alkali concns such as digested sludge; After inorganic coagulant elder generation additive process and the inorganic coagulant between the additive process; Sludge components when adding inorganic coagulant differs greatly, is applicable to additive process after the inorganic coagulant so be difficult to pH with optimum in the inorganic coagulant elder generation additive process.
Among the technology that additive process is relevant after above-mentioned and inorganic coagulant; Open in the clear 61-149300 communique the jp patent publication spy, in organic sludge, utilizing positively charged ion is that polymer coagulant generates clod, carries out gravity filtration; Add molysite and mixing, carry out pressurizing and dehydrating afterwards.In addition; Open in the flat 9-24400 communique the jp patent publication spy; In digested sludge, add cationic polymers and carry out coagulation treatment; The mud that condenses is carried out gravity dehydration, add inorganic coagulant and carry out modifiedly, add amphiphilic polymers in the mud after modulation and utilize water extracter to dewater.But, do not have the record relevant in these prior aries with the optimization of inorganic coagulant addition, more particularly do not exist with add inorganic coagulant after the relevant record of pH of parting liquid of pH or dehydration of the mud that condenses.In addition, do not exist in these prior aries with concentrate after the relevant record of optimization of the clod that condenses, more particularly do not exist with concentrated after the relevant record of size of the clod that condenses.
As stated, because between additive process after the inorganic coagulant and inorganic coagulant elder generation additive process, the sludge components when adding inorganic coagulant is different, so be necessary to study the optimum controling method of inorganic coagulant addition.In addition, after inorganic coagulant, in the additive process, be necessary to study the optimum controling method of the clod that condenses after concentrating.Its reason is the perviousness of inorganic coagulant, the reactive size that depends on the clod that condenses greatly.
Patent documentation 1: japanese kokai publication hei 4-284900 communique
Patent documentation 2: japanese kokai publication hei 10-165999 communique
Patent documentation 3: japanese kokai publication hei 8-173999 communique
Patent documentation 4: japanese kokai publication sho 61-149300 communique
Patent documentation 5: japanese kokai publication hei 9-24400 communique
Patent documentation 6: TOHKEMY 2009-165964 communique
Summary of the invention
The object of the present invention is to provide the control method of the inorganic coagulant addition under the additive process after a kind of inorganic coagulant and the device of implementing this method.In addition, a kind of control method of the clod that condenses under additive process after the inorganic coagulant and the device of implementing this method are provided.
In order to address the above problem; The result of the wholwe-hearted research of the inventor finds following situation: after inorganic coagulant in the additive process; Through the pH of the clod that condenses after the interpolation inorganic coagulant or the pH of the parting liquid that dewaters are adjusted in the pre-determined range, can reduce mud cake moisture extremely effectively.In addition, the inventor finds following situation: in the additive process, the size through clod is condensed in adjustment can reduce mud cake moisture extremely effectively after inorganic coagulant.Accomplished the present invention based on these newly discovereies.
That is, the present invention provides a kind of dewatering of mud, and it comprises: the operation of condensing, in organic sludge, add polymer coagulant, and this mud is condensed and form the clod that condenses; Enrichment process concentrates the clod that condenses that forms; Inorganic coagulant adds operation, in the spissated clod that condenses, adds inorganic coagulant; And dehydration procedure, the spissated clod that condenses after the interpolation inorganic coagulant is carried out mechanical dehydration; It is characterized in that the pH of the pH of the clod that condenses after the interpolation inorganic coagulant or dehydration filtrating is 3～6.In above-mentioned dewatering, also can be, the dewatering of above-mentioned mud has the adjustment operation, and this adjustment operation is adjusted into 0.5mm～10mm with the size of the spissated clod that condenses.
In addition, the present invention provides a kind of dewatering of mud, and it comprises: the operation of condensing, in organic sludge, add polymer coagulant, and this mud is condensed and form the clod that condenses; Enrichment process concentrates inorganic coagulant to the clod that condenses that forms and adds operation, in the spissated clod that condenses, adds inorganic coagulant; And dehydration procedure, the spissated clod that condenses after the interpolation inorganic coagulant is carried out mechanical dehydration; It is characterized in that the dewatering of above-mentioned mud has the adjustment operation, this adjustment operation is adjusted into 0.5mm～10mm with the size of the above-mentioned spissated clod that condenses.
And the present invention provides a kind of dewatering unit of mud, and it comprises: coagulating bath, and it has in organic sludge the parts that add polymer coagulant, and is used to make this mud to condense and forms the clod that condenses; Thickner, it is used for that the clod that condenses that forms is concentrated inorganic coagulant and adds parts, and it is used for adding inorganic coagulant at the spissated clod that condenses; And water extracter, it dewaters to the spissated clod that condenses that adds after the inorganic coagulant; It is characterized in that the dewatering unit of above-mentioned mud has function unit, this function unit is used for the addition of inorganic coagulant is controlled, so that the pH of mud after the above-mentioned interpolation inorganic coagulant or dehydration filtrating becomes 3～6.In above-mentioned dewatering unit; Also can be; Function unit has the pH transmitter that is used to measure pH; Can also be, the dewatering unit of above-mentioned mud has the clod adjustment component at the latter stage of above-mentioned thickner, and this clod adjustment component is used for the size of the spissated clod that condenses is adjusted into 0.5mm～10mm.
In addition, the present invention provides a kind of dewatering unit of mud, and it comprises: coagulating bath, and it has in organic sludge the parts that add polymer coagulant, and is used to make this mud to condense and forms the clod that condenses; Thickner, it is used for the clod that condenses that forms is concentrated; Inorganic coagulant adds parts, and it is used for certainly adding inorganic coagulant at the spissated mud that condenses; And water extracter, it dewaters to the spissated clod that condenses that adds after the inorganic coagulant; It is characterized in that the dewatering unit of above-mentioned mud has the clod adjustment component at the latter stage of above-mentioned thickner, this clod adjustment component is used for the size of the clod that condenses of above-mentioned spissated mud is adjusted into 0.5mm～10mm.
According to the present invention, in the additive process, the pH of the pH of the clod that condenses after the inorganic coagulant or the parting liquid that dewaters is added in utilization after inorganic coagulant, confirms the addition of inorganic coagulant, can reduce mud cake moisture extremely effectively.In addition, according to the present invention, in the additive process, the size that clod is condensed in adjustment can reduce mud cake moisture thus extremely effectively after inorganic coagulant.
As other effects of the present invention, can suppress to be attached to the dirt on the filtering surface of water extracter, the pipe arrangement that confession dehydration parting liquid flows through etc.Its reason is, through the pH that adds the clod that condenses after the inorganic coagulant or the pH of the parting liquid that dewaters are controlled, the principal constituent that can suppress to generate above-mentioned dirt is magnesium ammonium phosphate (MPA).
Description of drawings
Fig. 1 is the flowage structure figure of an example of expression dewatering unit of the present invention;
Fig. 2 is expression embodiment 1 result's the mud cake moisture and the coordinate diagram of p H relation;
Fig. 3 is the coordinate diagram of the big or small relation of expression embodiment 2 results' mud cake moisture and clod;
Fig. 4 is the coordinate diagram that is illustrated in the relation of the mud cake moisture among the mud A and pH under the known first additive process;
Fig. 5 is the coordinate diagram that is illustrated in the relation of the mud cake moisture among the mud B and pH under the known first additive process;
Fig. 6 is the coordinate diagram that is illustrated in the relation of the mud cake moisture among the mud C and pH under the known first additive process;
Fig. 7 is the coordinate diagram that is illustrated in the relation of the mud cake moisture among the mud D and pH under the known first additive process.
Embodiment
The present invention relates to the control method of the inorganic coagulant addition under the additive process after the inorganic coagulant and the device of implementing this method.In addition, the present invention relates to the control method of the clod that condenses under the additive process after the inorganic coagulant and the device of implementing this method.Below, specify embodiment of the present invention.
Fig. 1 is the flowage structure figure of an embodiment of expression dewatering unit of the present invention.In Fig. 1, organic sludge supplies to coagulating bath 4 from mud storage tank 1.Polymer coagulant supplies to coagulating bath 4 from polymer coagulant lixator 2.In coagulating bath 4, organic sludge and polymer coagulant mix and form the clod that condenses.In thickner 5, concentrate the clod that condenses.In clod adjustment machine 6, the clod that condenses is adjusted into suitable size.Inorganic coagulant supplies to inorganic coagulant adding machine 7 from inorganic coagulant storage tank 3, adds in the clod that condenses.The clod that condenses after the interpolation inorganic coagulant dewaters at water extracter 9.Utilize pH transmitter 8 to measure to add the pH of the clod that condenses after the inorganic coagulants.According to the pH of the clod that condenses after the interpolation inorganic coagulant of measuring by pH transmitter 8, utilize inorganic coagulant to add the addition that apparatus for controlling pump 10 is confirmed inorganic coagulant.Utilize inorganic coagulant to add pump 10 and carry out the interpolation of inorganic coagulant.
In clod adjustment machine 6, preferably, the clod that will condense is adjusted into 0.5mm～10mm.More preferably, will the condense size of clod is adjusted into 0.5mm～5mm.Its reason is that under the big situation of the clod that condenses, inorganic coagulant can not be penetrated into the inside of the clod that condenses, and is difficult to obtain the effect of inorganic coagulant.On the other hand, under the little situation of the clod that condenses, though inorganic coagulant can be penetrated into the inside of the clod that condenses, the little clod that condenses is unfavorable for dewatering at water extracter.Clod is adjusted into above-mentioned clod diameter if will condense, and then inorganic coagulant is penetrated into inside, can effectively utilize inorganic coagulant, in water extracter, also can dewater effectively simultaneously.Under the situation of using spiral pressing dehydrator, preferably, the size of the clod that will condense is adjusted into 1mm～5mm.Under the situation of using the belt squeezing dewatering machine, preferably, the size of the clod that will condense is adjusted into 0.5mm～3mm.The size utilization of clod of condensing is arranged on the rotating speed of the stirrer on the clod adjustment machine 6 or the shape of agitating vane is adjusted.
Preferably, the pH that inorganic coagulant is added into the clod that condenses after the interpolation inorganic coagulant is 3～6.More preferably, the pH that inorganic coagulant is added into the clod that condenses after the interpolation inorganic coagulant is 3.5～5.5.Especially more preferably, the pH that inorganic coagulant is added into the clod that condenses after the interpolation inorganic coagulant is 3.5～4.5.
Fig. 1 illustrates an embodiment of the present invention, but the invention is not restricted to illustrated content.For example, clod adjustment machine 6 is the adjustment devices of clod size that condense, but if the size that can utilize other devices or method adjustment to condense clod then there is no need to be provided with independently clod adjustment machine 6.Have at inorganic coagulant adding machine 7 under the situation of stirrer, also can omit clod adjustment machine 6, in inorganic coagulant adding machine 7, when the clod size is condensed in adjustment rightly, in the clod that condenses, add inorganic coagulant.In addition, also can omit clod adjustment machine 6, at the latter stage configuration inorganic coagulant adding machine 7 of thickner 5.In addition, also can omit clod adjustment machine 6, inorganic coagulant adding machine 7 and thickner 5 is integrated.In addition, also can clod be adjusted the latter stage that machine 6 is configured in inorganic coagulant adding machine 7.
The organic sludge that uses in the present invention is at the organic sludge that effluent sewerage processing, fecaluria are handled, various industrial sewage produces in handling.For example, can enumerate initial settling tank mud, excess sludge, anaerobically digested sludge, aerobic sigestion mud, purification tank mud, digestion disengaging liquid etc.Also can in organic sludge, contain organic/inorganic substance.
As the polymer coagulant that uses among the present invention, can use general employed polymer coagulant in sludge treatment, for example, can enumerate positively charged ion is polymer coagulant, Amphiphatic high polymer condensing agent etc.
As the inorganic coagulant that uses among the present invention, can use general employed inorganic coagulant in sludge treatment.For example, can enumerate iron(ic)chloride, Tai-Ace S 150, aluminum chloride, poly aluminium chloride, polyiron sulfate etc.
As the water extracter that uses among the present invention, can use the water extracter that in sludge dewatering in the past, uses.For example, can enumerate spiral pressing dehydrator, belt squeezing dewatering machine, centrifuge, vacuum hydroextractor, filter pressing dehydrator, multiple disk water extracter etc.
As the thickner that uses among the present invention, can use the gravity thickener or the mechanical thickener that in sludge dewatering in the past, use.For example, can enumerate belt thickner, centrifugal thickner, ellipse thickner etc.
Clod adjustment machine as using among the present invention can use the stirrer that in sludge dewatering in the past, uses.For example, can enumerate paddle stirrer, drum mixer etc.
Embodiment
(embodiment 1)
Carried out the sludge dewatering test under additive process after the inorganic coagulant.4 kinds of digested sludges (A, B, C, D) have been used.Digested sludge A, B, C, D gather from 3 different sewage works.Though digested sludge A, B gather in same sewage work, sludge concentration is different.The TS of digested sludge A, B, C, D (Total Solids, total solids) is respectively 2.2%, 1.3%, 1.8%, 1.5%.As polymer coagulant, the positively charged ion that has used dimethylaminoethyl methacrylate or dimethylaminoethyl acrylate is a polymer coagulant.As inorganic coagulant, used polyiron sulfate.Test sequence is following.In the mud of 250mL, add cationic polymers, mud is condensed, form the clod that condenses.Then, use the silk screen of 1mm that the clod that condenses is concentrated.Then, in the clod that condenses, add polyiron sulfate, condensation by mixing clod and polyiron sulfate.Then, the pH of measurement and the mixed clod that condenses of polyiron sulfate.At last, utilize the belt squeezing dewatering machine that the clod that condenses is dewatered, measure the moisture of resulting mud cake.
Test-results shown in the table 1.At this, will deduct the weight that obtains after " in the weight of the ironic hydroxide that the interpolation settle of polymerization iron goes out " from " the drying solid thing weight of measurement " as " pure drying solid thing weight ", calculate mud cake moisture.
(table 1)
According to table 1; The pH that calculate to add the clod that condenses behind the polyiron sulfate is respectively 80.2%, 79.9%, 79.7% for the MV of the dehydrated sludge cake moisture of " big below 6 and than 3 situation ", " big below 5.5 and than 3.5 situation ", " big below 4.5 and than 3.5 situation ".Can know that according to this result the pH of the clod that condenses behind the interpolation polyiron sulfate preferably is adjusted into pH3～6, more preferably is adjusted into pH3.5～5.5, especially preferred is to be adjusted into pH3.5～4.4, thereby can reduce mud cake moisture.
Shown in Fig. 2 as the mud cake moisture of the mud C of typical case and the relation of pH.Can know that according to Fig. 2 along with the input rate increase of polyiron sulfate, the pH of the clod that condenses behind the mixing polyiron sulfate reduces gradually.Before about the pH of the clod that condenses after mixing polyiron sulfate becomes 4～5, mud cake moisture reduces gradually, in case pH greater than 4～5, mud cake moisture is just constant or increase.
(embodiment 2)
Carried out the sludge dewatering test under additive process after the inorganic coagulant.3 kinds of digested sludges (C, E, F) have been used.Digested sludge C, E, F gather from 3 different sewage works.The TS of digested sludge C, E, F is respectively 1.8%, 1.7%, 2.8%.As polymer coagulant, used cationic polymers.Cationic polymers is dimethylaminoethyl methacrylate system or dimethylaminoethyl acrylate system.As inorganic coagulant, used polyiron sulfate.Test sequence is following.In the mud of 250mL, add cationic polymers, mud is condensed, form the clod that condenses.Then, use the silk screen of 1mm that the clod that condenses is concentrated.Then, in the clod that condenses, add polyiron sulfate, condensation by mixing clod and polyiron sulfate.At this moment, the size of measurement and the mixed clod that condenses of polyiron sulfate.At last, utilize belt squeeze water machine that the clod that condenses is dewatered, measure the moisture of resulting mud cake.
Test-results shown in the table 2.Can know that according to table 2 size of the clod that condenses behind the interpolation polyiron sulfate preferably is adjusted into 0.5mm～10mm, more preferably is adjusted into 0.5mm～5mm, thereby can reduces mud cake moisture.
(table 2)
Shown in Fig. 3 as the mud cake moisture of the mud C of typical case and the relation of clod size.The stirring number of times of transverse axis is represented the stirring number of times under the gravity fall.Can know that according to Fig. 3 along with the increase of stirring number of times, the clod size reduces.Mud cake moisture is that 10mm is the highest when above in the clod size, and along with reducing of clod size, mud cake moisture reduces.
(comparative example)
In order to confirm to be applicable to inorganic coagulant elder generation additive process, whether can carry out optimum control, and test the inorganic coagulant addition through disclosed pH in the prior art that will be relevant with the first additive process of inorganic coagulant.The 4 kind digested sludges (A, B, C, D) identical have been used with embodiment 1,2.
Test sequence is following.In the mud of 250mL, add polyiron sulfate (polymerization iron), utilize spatula mixing sludge and polyiron sulfate, measure the pH of mud afterwards.Then, add cationic polymers, mud is condensed and form the clod that condenses.At last, utilize the belt squeezing dewatering machine that the clod that condenses is dewatered, measure the moisture of resulting mud cake.
The test-results of mud A～D is shown respectively among Fig. 4～Fig. 7.At this, will deduct the weight that obtains after " in the weight of the ironic hydroxide that the interpolation settle of polymerization iron goes out " from " the drying solid thing weight of measurement " as " pure drying solid thing weight ", calculate mud cake moisture.Can know according to Fig. 4～Fig. 7, not draw following result: under inorganic coagulant elder generation additive process, in certain specific pH zone, mud cake moisture reduces.
Through contrasting method of the present invention (Fig. 2) with mud C and existing method (Fig. 6) can be known, in the present invention, the polyiron sulfate IR is few, can be pH3～6 with pH regulator, thereby can mud cake moisture be reduced to below 80%.
Claims (7)
1. the dewatering of a mud comprises: the operation of condensing, in organic sludge, add polymer coagulant, and this mud is condensed and form the clod that condenses; Enrichment process concentrates the clod that condenses that forms; Inorganic coagulant adds operation, in the spissated clod that condenses, adds inorganic coagulant; And dehydration procedure, the spissated clod that condenses after the interpolation inorganic coagulant is carried out mechanical dehydration; It is characterized in that,
The pH of the pH of the clod that condenses after the interpolation inorganic coagulant or dehydration filtrating is 3～6.
2. want the dewatering of 1 described mud according to right, it is characterized in that,
The dewatering of above-mentioned mud has the adjustment operation, and this adjustment operation is adjusted into 0.5mm～10mm with the size of the above-mentioned spissated clod that condenses.
3. the dewatering of a mud comprises: the operation of condensing, in organic sludge, add polymer coagulant, and this mud is condensed and form the clod that condenses; Enrichment process concentrates the clod that condenses that forms; Inorganic coagulant adds operation, in the spissated clod that condenses, adds inorganic coagulant; And dehydration procedure, the spissated clod that condenses after the interpolation inorganic coagulant is carried out mechanical dehydration; It is characterized in that,
The dewatering of above-mentioned mud has the adjustment operation, and this adjustment operation is adjusted into 0.5mm～10mm with the size of the above-mentioned spissated clod that condenses.
4. the dewatering unit of a mud comprises: coagulating bath, and it has the parts that in organic sludge, add polymer coagulant, and is used to make this mud to condense and forms the clod that condenses; Thickner, it is used for the clod that condenses that forms is concentrated; Inorganic coagulant adds parts, and it is used for adding inorganic coagulant at the spissated clod that condenses; And water extracter, it dewaters to the spissated clod that condenses that adds after the inorganic coagulant; It is characterized in that,
The dewatering unit of above-mentioned mud has function unit, and this function unit is used for the addition of inorganic coagulant is controlled, and becomes 3～6 so that add the pH of the mud after the above-mentioned inorganic coagulant or the filtrating of dewatering.
5. the dewatering unit of mud according to claim 4 is characterized in that,
Above-mentioned function unit has the pH transmitter that is used to measure pH.
6. according to the dewatering unit of claim 4 or 5 described mud, it is characterized in that,
The dewatering unit of above-mentioned mud has the clod adjustment component at the latter stage of above-mentioned thickner, and this clod adjustment component is used for the size of the clod that condenses of above-mentioned spissated mud is adjusted into 0.5mm～10mm.
7. the dewatering unit of a mud comprises: coagulating bath, and it has the parts that in organic sludge, add polymer coagulant, and is used to make this mud to condense and forms the clod that condenses; Thickner, it is used for the clod that condenses that forms is concentrated; Inorganic coagulant adds parts, and it is used for adding inorganic coagulant at the spissated clod that condenses; And water extracter, it dewaters to the spissated clod that condenses that adds after the inorganic coagulant; It is characterized in that,
The dewatering unit of above-mentioned mud has the clod adjustment component at the latter stage of above-mentioned thickner, and this clod adjustment component is used for the size of the clod that condenses of above-mentioned spissated mud is adjusted into 0.5mm～10mm.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-186772 | 2010-08-24 | ||
| JP2010186772A JP5256261B2 (en) | 2010-08-24 | 2010-08-24 | Method and apparatus for dewatering organic sludge |
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| CN107001080A (en) * | 2014-12-11 | 2017-08-01 | 凯米罗总公司 | Real-time dehydration optimization |
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| JP5974570B2 (en) * | 2012-03-21 | 2016-08-23 | 栗田工業株式会社 | Dewatering method and apparatus for pressurized floating sludge |
| JP6378865B2 (en) * | 2012-08-08 | 2018-08-22 | 水ｉｎｇ株式会社 | Sludge treatment method and apparatus |
| JP6425900B2 (en) * | 2014-03-13 | 2018-11-21 | 株式会社神鋼環境ソリューション | Sludge dewatering system and dewatering method of sludge |
| JP6806332B2 (en) * | 2017-03-27 | 2021-01-06 | メタウォーター株式会社 | Water treatment equipment and water treatment method |
| KR101936416B1 (en) * | 2018-05-24 | 2019-01-08 | (주)태영필트레이션시스템 | Coagulant feeding device and sludge filtering system |
| KR102527197B1 (en) * | 2021-08-24 | 2023-04-28 | 주식회사 가경코스모 | Reduction of moisture content method for sludge cake |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0976000A (en) * | 1995-09-07 | 1997-03-25 | Kurita Water Ind Ltd | Sludge dehydrating method |
| JP2009028663A (en) * | 2007-07-27 | 2009-02-12 | Kurita Water Ind Ltd | Sludge dewatering method |
| JP2009165964A (en) * | 2008-01-16 | 2009-07-30 | Kobelco Eco-Solutions Co Ltd | Method and system for dehydrating sludge |
| CN101704629A (en) * | 2009-09-18 | 2010-05-12 | 东莞玖龙纸业有限公司 | Method for dynamically controlling continuous feeding in dehydration of papermaking sludge |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61149300A (en) * | 1984-12-25 | 1986-07-07 | Nittetsu Mining Co Ltd | Dehydration of organic sludge |
| JP3248188B2 (en) * | 1991-03-14 | 2002-01-21 | 栗田工業株式会社 | Organic sludge dewatering method |
| JP2960309B2 (en) * | 1994-09-08 | 1999-10-06 | 株式会社西原環境衛生研究所 | Sludge treatment equipment |
| JP3622274B2 (en) * | 1995-07-13 | 2005-02-23 | 栗田工業株式会社 | Digestion method of digested sludge |
| JP2000015300A (en) * | 1998-07-02 | 2000-01-18 | Japan Organo Co Ltd | Dehydration of sludge |
-
2010
- 2010-08-24 JP JP2010186772A patent/JP5256261B2/en active Active
-
2011
- 2011-08-24 CN CN201110244205.0A patent/CN102372411B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0976000A (en) * | 1995-09-07 | 1997-03-25 | Kurita Water Ind Ltd | Sludge dehydrating method |
| JP2009028663A (en) * | 2007-07-27 | 2009-02-12 | Kurita Water Ind Ltd | Sludge dewatering method |
| JP2009165964A (en) * | 2008-01-16 | 2009-07-30 | Kobelco Eco-Solutions Co Ltd | Method and system for dehydrating sludge |
| CN101704629A (en) * | 2009-09-18 | 2010-05-12 | 东莞玖龙纸业有限公司 | Method for dynamically controlling continuous feeding in dehydration of papermaking sludge |
Non-Patent Citations (1)
| Title |
|---|
| 聂永丰: "《三废处理工程技术手册-固体废物卷》", 29 February 2000, 化学工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107001080A (en) * | 2014-12-11 | 2017-08-01 | 凯米罗总公司 | Real-time dehydration optimization |
| CN107001080B (en) * | 2014-12-11 | 2021-06-29 | 凯米罗总公司 | Real-time dehydration optimization |
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| JP2012045441A (en) | 2012-03-08 |
| CN102372411B (en) | 2015-07-08 |
| JP5256261B2 (en) | 2013-08-07 |
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