CN205340260U - A device for rinsing mud sheet frame dehydration filter cloth - Google Patents
A device for rinsing mud sheet frame dehydration filter cloth Download PDFInfo
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- CN205340260U CN205340260U CN201620052963.0U CN201620052963U CN205340260U CN 205340260 U CN205340260 U CN 205340260U CN 201620052963 U CN201620052963 U CN 201620052963U CN 205340260 U CN205340260 U CN 205340260U
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Abstract
The utility model provides a device for rinsing mud sheet frame dehydration filter cloth, include the acidizing fluid jar, diluted acid return tank and the filter press that connect through pipeline and valve, be provided with the notes acid pump between acidizing fluid jar and the filter press, the diluted acid return tank with be provided with the diluted acid backwash pump between the filter press, its characteristics lie in: filter press is provided with two at least, and is still within a definite time sour including depositing, it carries the ortho acid extremely to deposit the sour conveyor that passes through within a definite time dispose the acidizing fluid in the acidizing fluid jar, the acidizing fluid jar with be provided with clear diluted acid backwash pump between the diluted acid return tank, the bottom of diluted acid return tank is provided with the scraper, it throws with the mouth to be provided with alkali on the diluted acid return tank, the diluted acid return tank still is connected with mud quenching and tempering pond, mud quenching and tempering pond with filter press is connected.
Description
Technical field
This utility model relates to filter press technical field, particularly for the device cleaning mud sheet frame dehydration filter cloth.
Background technology
Filter press is the method that deeply dehydrating sludge is conventional, in filter process, solid particle in fluid and filter cloth hole wall collide, granule is caught and delay by filter cloth, so as to separate from fluid, reach the purpose of solid-liquid separation, deeply dehydrating sludge process needs add substantial amounts of calcium, magnesium, ferrum, the modified medicament of aluminum class, the small flco of part that these medicaments are formed with mud, under strong pressure effect, very easily it is deposited in the hole between filter cloth yarn and in interfibrous space, exist simultaneously because the coagulant class medicament added is many during the modified flocculation of mud with hydroxide form, with in air contact process, part calcium hydroxide kind material carbon dioxide reaction easily and in air generates carbonate material further, enhance the firmness that between filter cloth hole, deposit is combined with filter cloth.
Filter cloth is using after a period of time, filter cloth surface attachment canescence dirt shape thing, occurs hardening, hardening phenomenon, and simultaneously along with the prolongation of the time of use, dirt shape thing increases further, also piles up between the space of diaphragm plate drainage passage.And water washing effect is poor, have a strong impact on the filter efficiency of filter cloth and the normal operation of filter press.
Filter cloth cleaning method common at present have heating hot water strong pressure flusher, water under high pressure to add chemical agent cleans in conjunction with off-line, the ultrasonic chemical agent that adds is cleaned, realized strong acid diluent wash cycles etc. by acid-proof pump between detergent line and pressure filter, existing various cleaning methods exist that labor intensity is big, high, the filter cloth that cleans cost and equipment loss is relatively big or other types cleanout fluid is to drawbacks such as the deeply dehydrating sludge filter cloth to be cleaned suitability are not strong.
The Chinese utility model patent file that publication number is CN203400542U discloses the online soak acid-cleaning system of canvas press cloth in a kind of sludge dewatering work, and this system includes acid cleaning tank, acid pump is connected as a single entity by pipeline valve and filter press.System carries oxalic acid and fills and air mix facilities, by acid pump, pickle is directly squeezed into inside pressure filter, pressurize is soaked, and compares the method that cleaning pulled down by tradition filter cloth, and the cleaning frequency is short, save human cost, but acid cleaning tank only one of which, after immersion after the backflow of pickle liquid, it is impossible to realize the continuous operation that multiple filter press soaks online, in addition the online soak acid-cleaning system of this canvas press cloth also has waste liquid to discharge, and environment can be caused secondary pollution.
Utility model content
For the problems referred to above, this utility model provides the device for cleaning mud sheet frame dehydration filter cloth, and its scavenging period is short, cleaning performance good, can production run continuously, it is possible to postpone Clean after every, reduce operating cost, without waste liquid discharge, it is to avoid secondary pollution.
Concrete technical scheme of the present utility model is as follows:
A kind of device for cleaning mud sheet frame dehydration filter cloth, including the acid solution tank connected by pipeline and valve, diluted acid return tank and filter press, it is provided with acid filling pump between described acid solution tank and filter press, it is provided with diluted acid reflux pump between described diluted acid return tank and described filter press, its spy is being in that: described filter press is at least provided with two, also include depositing between acid, ortho acid is delivered in described acid solution tank by conveyer device between acid and configures acid solution by described depositing, supernatant diluted acid reflux pump it is provided with between described acid solution tank and described diluted acid return tank, the bottom of described diluted acid return tank is provided with scraper, described diluted acid return tank is provided with alkali and adds mouth, described diluted acid return tank is also associated with the modified pond of mud, the modified pond of described mud is connected with described filter press.
Further, described depositing includes acetic acid tank, oxalic acid container, citric acid container between acid, described conveyer device includes the liquid dosing pump being arranged between described acetic acid tank and described acid solution tank, the spiral solid drug feeding device being arranged between described oxalic acid container and described acid solution tank, is arranged on the spiral solid drug feeding device between described citric acid container and described acid solution tank.
Further, it is provided with oar blade type dilution agitator in described acid solution tank.
Further, it is provided with overflow pipe between described acid solution tank and described diluted acid return tank.
Further, described acid solution tank, diluted acid return tank are respectively arranged with acidometer, being provided with pressure controller in described filter press, described acidometer, liquid dosing pump, spiral solid drug feeding device, acid filling pump, diluted acid reflux pump, supernatant diluted acid reflux pump, pressure controller electricly connect with PLC respectively.
Device for cleaning mud sheet frame dehydration filter cloth of the present utility model, ortho acid adds configuration dilution in acid solution tank to by conveyer device, interpolation proportioning three kinds sour can be regulated by conveyer device according to the difference of sludge shale, after cleaning, pickle can be back to diluted acid reuse tank by diluted acid reflux pump, add mouth by alkali and can be precipitated back into the substantial amounts of metal ion in acid solution and particle to diluted acid reuse tank throwing alkali, sediment discharge is in the modified pond of mud, in precipitate, mud can be carried out second step modified for and alkali metal precipitate oxide-based containing alkali, promote the modified dehydration of mud, extend the interval time that sheet frame cleans simultaneously, and it is low to clean use acid strength, diluted acid enters the modified mud in the modified pond of mud, do not affect recycling sludge, discharge without waste liquid, realize environmental protection to utilize, the supernatant is delivered in acid solution tank through supernatant diluted acid reflux pump after precipitation in diluted acid reuse tank and reuses by the acid solution of backflow, realize acid cycle, dynamic cleaning filter cloth, acidometer, liquid dosing pump, spiral solid drug feeding device electricly connects with PLC respectively；PLC records total acidity in acid acid solution tank according to acidometer and controls vehicle feeding configuration acid solution, increases acid concentration, completes quantitative, Rapid Cleaning, and automaticity is high；Equipped with overflow pipe in acid solution tank, it is prevented that volumetric expansion that in acid dilution process, heat release causes and overflow, can by direct for overflowing liquid overflow to diluted acid reuse tank.
Accompanying drawing explanation
Fig. 1 is the structural representation of the device for cleaning mud sheet frame dehydration filter cloth of the present utility model.
Detailed description of the invention
Below in conjunction with drawings and Examples, this utility model is described in further detail.
See Fig. 1, a kind of device for cleaning mud sheet frame dehydration filter cloth of the present utility model, 1 is deposited between acid including what connected by pipeline and valve, acid solution tank 2, diluted acid return tank 3, at least two filter press 4, deposit between acid 1 and be delivered in acid solution tank 2 by ortho acid the acid solution of configuration by conveyer device, oar blade type dilution agitator 5 it is provided with in acid solution tank 2, deposit between acid 1 and include acetic acid tank 6, oxalic acid container 7, citric acid container 8, conveyer device includes the liquid dosing pump 9 being arranged between acetic acid tank 6 and acid solution tank 2, it is arranged on the spiral solid drug feeding device 10a between oxalic acid container 7 and acid solution tank 2, it is arranged on the spiral solid drug feeding device 10b between citric acid container 8 and acid solution tank, acid filling pump 11 it is provided with between acid solution tank 2 and filter press 4, supernatant diluted acid reflux pump 12 it is provided with between acid solution tank 2 and diluted acid return tank 3, diluted acid reflux pump 13 it is provided with between diluted acid return tank 3 and filter press 4, the bottom of diluted acid return tank 3 is provided with scraper 14, diluted acid return tank 3 is provided with alkali and adds mouth 15, diluted acid return tank 3 is also associated with the modified pond 16 of mud, the modified pond 16 of mud is connected with filter press 4, overflow pipe 17 it is provided with between acid solution tank 2 and diluted acid return tank 3, acid solution tank 2, diluted acid return tank 3 is respectively arranged with acidometer (not providing in figure), pressure controller (not providing in figure) it is provided with in filter press 4, acidometer, liquid dosing pump 9, spiral solid drug feeding device 10a, spiral solid drug feeding device 10b, acid filling pump 11, diluted acid reflux pump 13, supernatant diluted acid reflux pump 12, pressure controller (does not provide in figure) and electricly connects with PLC (not providing in figure) respectively.
Filter cloth is using after a period of time, filter cloth surface attachment dirt shape thing, occurs hardening, hardening phenomenon, and simultaneously along with the prolongation of the time of use, dirt shape thing increases further, also piles up between the space of diaphragm plate drainage passage.Filter cloth telogenesis facet attachment dirt shape thing contains calcium carbonate, calcium hydroxide, hydrated ferric oxide., magnesium hydroxide, magnesium ammonium phosphate (guanite) etc. by analysis.In dirt shape thing composition, change the maximum content for hydrated ferric oxide..Oxalic acid is better to hydrated ferric oxide. class dirt shape thing elimination effect；Acetic acid is better to calcium carbonate and calcium hydroxide, magnesium hydroxide class dirt shape thing elimination effect, and can soften filter cloth；Citric acid can promote that dirt shape thing dissolves further, especially alkali metal class, and has buffering, antioxidation, deodorize function, it is possible to decrease the damage to filter cloth and equipment.
When the mass percent of dirt shape thing composition is: when calcium carbonate 30 ~ 34.5%, calcium hydroxide 16 ~ 18.9%, magnesium hydroxide 6 ~ 8%, hydrated ferric oxide. 18 ~ 22%, magnesium hydrogen phosphate 15 ~ 16.6%, selecting acid solution quality proportioning is acetic acid: oxalic acid: citric acid 3:2:1, filter cloth can be softened by the acid solution of said ratio configuration, effectively remove the dirty shape thing on mud sheet frame dehydration filter cloth, before cleaning, filter cloth is sepia, and quality is hard；After cleaning, filter cloth is white, filter cloth deliquescing, generating section brown precipitate, a large amount of white precipitate, part reddish-brown precipitation, and when the filter cloth after cleaning uses, inlet amount promotes, and mud extraction moisture content of the cake reduces；
When the mass percent of dirt shape thing composition is: calcium carbonate 30 ~ 34.5%, calcium hydroxide 16 ~ 18.9%, magnesium hydroxide 6 ~ 8%, when hydrated ferric oxide. content is 22%-33%, improve the adding proportion of combination acid solution mesoxalic acid, can by acetic acid: oxalic acid: the mass ratio of citric acid is gradually increased to 4:3:1 from 3:2:1, filter cloth can be softened by the acid solution of said ratio configuration, effectively remove the dirty shape thing on mud sheet frame dehydration filter cloth, before cleaning, filter cloth is sepia, and quality is hard；After cleaning, filter cloth is white, filter cloth deliquescing, generating section brown precipitate, a large amount of white precipitate, a large amount of reddish-brown precipitation, and when the filter cloth after cleaning uses, inlet amount promotes, and mud extraction moisture content of the cake reduces；
When the mass percent that the hydrated ferric oxide. in dirt shape thing accounts for is more than 33%, it is necessary to change filter cloth；When the mass percent that the hydrated ferric oxide. in dirt shape thing accounts for is less than 22%, it is not necessary to clean.
A kind of device for cleaning mud sheet frame dehydration filter cloth of the present utility model, solid acid, liquid acid all seal and are stored between acid 1, equipped with acetic acid in acetic acid tank 2, it is connected with acid solution tank 2 by pipeline, by the quantitative suction acid solution tank 2 of liquid dosing pump 9, equipped with oxalic acid in oxalic acid container 7, it is quantitatively transferred to acid solution tank 2 by counting heavy corkscrews solid drug feeding device 10a, equipped with citric acid in citric acid container 8, it is quantitatively transferred to acid solution tank 2 by counting heavy corkscrews solid drug feeding device 10b；Equipped with oar blade type dilution agitator 8 in acid solution tank 2, it is achieved the dilution of acid solution with mix, equipped with overflow pipe 17 in acid solution tank 2, it is prevented that volumetric expansion that in acid dilution process, heat release causes and overflow, can by direct for overflowing liquid overflow to diluted acid reuse tank 3；In filter press 4 pressure-filtering process, the pressure controller of filter press 4 senses mud sample introduction pressure once exceed appointment limit value 1.0MPa, illustrate that filter cloth permeability can not meet continuation Production requirement, there is fouling in filter cloth, blocking, need to carry out pickling, now pressure signal feeds back in PLC, PLC starts the sour dilution set, process realizes three kinds of acid be quantitatively adding by portfolio ratio, dilution, obtain the sour cleanout fluid that total acid concentration is certain, wherein acid solution ratio and concentration can set targetedly according to different mud fouling character on sheet frame.
After the filter pressing of one filter press 4 terminates, modified mud injects another filter press 4 and carries out filter pressing, within batch filter pressing interval time, this TV station sheet frame enters acid soak cleaning procedure, the acid solution just diluted is injected in sheet frame from acid solution tank 2 low pressure by acid filling pump 11, when there is certain pressure reduction 0.3-0.6MPa in sheet frame, keep pressure reduction on the one hand for ensureing the sealing of filter press chamber, it is to avoid the liquid entering sheet frame overflows；On the other hand under pressure, acid solution is more violent with the dirty shape thing chemical reaction of filter cloth surface, ensure cleaning performance, by diluted acid reflux pump 13 by sheet frame pickle suction diluted acid reuse tank 3, stop in diluted acid reuse tank 3 after precipitating by supernatant diluted acid reflux pump 12 suction acid solution tank 2, realize acid cycle, dynamic cleaning sheet frame.Filter cloth cleans acid solution and reaches to remove the effect of dirt shape thing mainly through the effect of acid, along with the carrying out that acid solution is reacted with dirt shape thing, wherein in acid solution, effective ion gradually uses up during the course, and loses cleaning performance, and whether acid solution also has cleaning performance and can pass through the apparent feedback of change of pH value.Acidometer measures total acidity in acid solution tank 2, reduces obvious if cleaning acid concentration, and pH value is more than 4, then without cleaning performance, then it is again started up configuration acid solution process, increases acid concentration, complete quantitative, Rapid Cleaning, acidometer measures total acidity in diluted acid reuse tank 3, before and after cleaning, acid concentration difference tends in certain limit, it is believed that filter cloth cleaning, and acid filling pump 11 quits work, acid solution in sheet frame is evacuated by diluted acid reflux pump 13, completes the cleaning of sheet frame filter cloth.
Pickle enters diluted acid reuse tank 3 precipitated impurities, after cleaning 3-5 cleaning frequency, starts scraper 14 bottom diluted acid reuse tank 3, and body refuse returns to the modified pond 15 of mud and processes, and it is modified that mud can be carried out the first step by contained diluted acid.Repeatedly clean in the reuse acid solution of sheet frame containing substantial amounts of metal ion and particle, acid residual concentration keeps reduced levels simultaneously, by alkali, alkali is added mouth 18 add, precipitation removes these materials, it is linked into the modified pond 15 of mud again by scraper 14, contained alkali is oxide-based and alkali metal precipitate that mud can carry out second step is modified, promoted the modified dehydration of mud, extended the interval time that sheet frame cleans simultaneously.Three kinds of acid are environmentally friendly acid solution, easily decompose, and it is low to clean use acid strength, and diluted acid enters the modified mud in the modified pond of mud, does not affect recycling sludge, discharges without waste liquid, it is achieved environmental protection utilizes.
Adopt of the present utility model for clean mud sheet frame dehydration filter cloth device clean filter cloth work process as follows: when diaphragm type filter press pressure controller sense that feed pressure rises to more than 1.0MPa, filter press quits work；
When the hydrated ferric oxide. mass percent in the dirty shape thing on mud sheet frame dehydration filter cloth is 18 ~ 22%, acetic acid, oxalic acid, citric acid are added in acid solution tank by the mass ratio of 3:2:1, water filling in acid solution tank, stirred by oar blade type dilution agitator so that the acid concentration of acid solution is less than or equal to 10% simultaneously；
When hydrated ferric oxide. mass percent 22% ~ 33% in the dirty shape thing on mud sheet frame dehydration filter cloth, acetic acid, oxalic acid, citric acid are added in acid solution tank by the mass ratio of 3:2:1 ~ 4:3:1, water filling in acid solution tank, stirred by oar blade type dilution agitator so that the acid concentration of acid solution is less than or equal to 10% simultaneously；
After acid solution has configured, by acid filling pump, acid solution in acid solution tank is injected filter press, keeping pressure in the sheet frame of filter press is 0.2 ~ 0.6MPa, acid solution reacts cleaning filter cloth in filter press with the dirty shape thing on mud sheet frame dehydration filter cloth, and pickling one cleaning frequency, a cleaning frequency continue 1.5-2.5 hour；
The sheet frame pickle on the reacted upper strata in the barrier film sheet frame of filter press is back in diluted acid reuse tank by diluted acid reflux pump, adds mouth from alkali and makes, by the metal ion acid solution and particle precipitation, to cross 10-30 minute consuming time of stream precipitation；
The acid solution of backflow is delivered in acid solution tank through supernatant diluted acid reflux pump after precipitation in diluted acid reuse tank and reuses, it is achieved acid cycle, dynamic cleaning；
When acidometer detects that the pH value in acid solution tank is be more than or equal to 4, PLC control spiral solid drug feeding device, liquid dosing pump add ortho acid in acid solution tank and reconfigure acid solution, increase acid concentration；
Precipitated impurities in diluted acid reuse tank is scraped through scraper after 3-5 cleaning frequency and is carried out modified to mud in the modified pond of mud.
Traditional soaking and washing device adopt 15% hydrochloric acid to be carried out, acid strength is high, environment also can be caused secondary pollution by hydrochloric acid, device for cleaning mud sheet frame dehydration filter cloth of the present utility model adopts acetic acid, oxalic acid, citric acid is mixed in proportion configuration, the acid concentration of acid solution is less than or equal to 10%, acid solution consumption is few, save acid solution, traditional soaking and washing device adopt 15% hydrochloric acid be carried out equipment and filter cloth are corroded height, the acid solution of the rinser for cleaning mud sheet frame dehydration filter cloth of the present utility model is inconspicuous to equipment corrosion, especially filter cloth is aging slack-off, filter cloth life cycle postpones, the service life of 10% can be postponed；Keeping pressure in the sheet frame of filter press during pickling is 0.2 ~ 0.6MPa, more energy-conservation compared with traditional soaking and washing matching requirements 0.75MPa, acid solution cleans 1.5-2.5 hour consuming time an of cycle, within 6-8 hour, more save the time compared with traditional soaking and washing matching requirements, and 2 hours sludge press filtration batch used times, do not affect continuous production；In traditional soaking and washing device, acid solution residual concentration after immersion is high, due to metal salinity impurities accumulation in acid solution after prolonged and repeated use, needs are processed to, cause waste, in rinser of the present utility model, the sheet frame pickle on the reacted upper strata in the barrier film sheet frame of filter press is back in diluted acid reuse tank, add mouth from alkali and make by the metal ion acid solution and particle precipitation, directly precipitate can be used for mud after Reusability modified, realize Appropriate application, the supernatant is delivered in acid solution tank through supernatant diluted acid reflux pump after precipitation in diluted acid reuse tank and reuses by the acid solution of backflow, discharge without waste liquid, realize environmental protection to utilize；Adopting traditional soaking and washing device generally monthly to clean once, the device for cleaning mud sheet frame dehydration filter cloth of the present utility model can postpone Clean after every, cleaned once every 1.5 months；After adopting the device for cleaning mud sheet frame dehydration filter cloth of the present utility model to clean, the inlet amount of filter press promotes 16%-17%, and mud extraction moisture content of the cake reduces 3%-5%.
Specific embodiment 1: certain deeply dehydrating sludge project, has diaphragm type filter press two, filter press filter plate size 2m*2m, filter plate 115 pieces.Using after a period of time, filter cloth occurs that dirt shape thing is obvious, and filter cloth hardens hardening phenomenon, and feed pressure rapidly increases to more than 1.0MPa and sample size significantly reduces, and illustrates that this TV station sheet frame filter cloth needs cleaning.Dirt shape thing Ingredient percent is after testing: calcium carbonate 32.5%, calcium hydroxide 17.9%, magnesium hydroxide 6.5%, hydrated ferric oxide. 21.6%, magnesium hydrogen phosphate 14.2%, and 7.3% composition is failed to understand.PLC starts complex acid process, and acid solution tank injects acetic acid 0.3t(acetic acid content >=99.5% through conveyer device), oxalic acid 0.2t(oxalic acid content >=99%), citric acid 0.1t(citric acid content >=99%) and, after dilute, prepare solution 18m3,Before soaking, acid solution pH value is 1.38；After this filter pressing terminates; modified mud is squeezed into another filter press and is ensured normal production; this TV station filter press stop cleaning filter cloth; acid solution is squeezed into filter press by acid filling pump; pressure about 0.3Mpa in holding frame; pickle reflux pump is back to diluted acid reuse tank by crossing plate cleaning acid solution; cross stream precipitation about 10min; supernatant returns acid solution tank; realizing dynamic pickling, pickling about 2h completes filter cloth and cleans, and filter cloth and the dirty shape thing between the aquaporin on filter press filter board disappear, loosen; filter cloth recovers resilient flexible, and after immersion, acid solution pH value is 3.54；Impurity is regularly precipitated removal by diluted acid reuse tank, is generally 3 ~ 5 cleaning frequencies, and impurity liquid is used for the modified dehydration of mud, can significantly reduce moisture content of the cake.Attachment between filter cloth surface and lining cloth is removed further, remains acid solution simultaneously and be rinsed totally between fiber cloth and between conveyance conduit, and inlet amount promotes 16.5%, and mud extraction moisture content of the cake reduces by 3.5%.
Specific embodiment 2: certain deeply dehydrating sludge project, has diaphragm type filter press two, filter press filter plate size 1.5m*1.5m, filter plate 110 pieces.Using after a period of time, filter cloth occurs that dirt shape thing is obvious, and filter cloth hardens hardening phenomenon, and feed pressure rapidly increases to more than 1.0MPa and sample size significantly reduces, and illustrates that this TV station sheet frame filter cloth needs cleaning.After testing dirt shape thing Ingredient percent be calcium carbonate 30.8%, calcium hydroxide 16.6%, magnesium hydroxide 6.4%, hydrated ferric oxide. 23.8%, magnesium hydrogen phosphate 12.5%, 9.9% composition fail to understand.PLC starts complex acid process, and acid solution tank injects acetic acid 0.4t(acetic acid content >=99.5% through conveyer device), oxalic acid 0.28t(oxalic acid content >=99%), citric acid 0.12t(citric acid content >=99%) and, after dilute, prepare solution 18m3, acid solution pH value is 1.56.After this filter pressing terminates; modified mud is squeezed into another filter press and is ensured normal production; this TV station filter press stop cleaning filter cloth; acid solution is squeezed into filter press by acid filling pump; pressure about 0.3Mpa in holding frame; pickle reflux pump is back to diluted acid reuse tank by crossing plate cleaning acid solution; cross stream precipitation about 10min; supernatant returns acid solution tank; realizing dynamic pickling, pickling about 2h completes filter cloth and cleans, and filter cloth and the dirty shape thing between the aquaporin on filter press filter board disappear, loosen; filter cloth recovers resilient flexible, and now cleaning acid solution pH value is 3.86.Impurity is regularly precipitated removal by diluted acid reuse tank, is generally 3 ~ 5 cleaning frequencies, and impurity liquid is used for the modified dehydration of mud, can significantly reduce moisture content of the cake.Attachment between filter cloth surface and lining cloth is removed further, remains acid solution simultaneously and be rinsed totally between fiber cloth and between conveyance conduit, and inlet amount promotes 17%, and mud extraction moisture content of the cake reduces by 4.1%.
Specific embodiment 3: certain deeply dehydrating sludge project, has diaphragm type filter press two, filter press filter plate size 1.5m*1.5m, filter plate 110 pieces.Using after a period of time, filter cloth occurs that dirt shape thing is obvious, and filter cloth hardens hardening phenomenon, and feed pressure rapidly increases to more than 1.0MPa and sample size significantly reduces, and illustrates that this TV station sheet frame filter cloth needs cleaning.After testing dirt shape thing composition be calcium carbonate 31.6%, calcium hydroxide 17.1%, magnesium hydroxide 6.8%, hydrated ferric oxide. 22.8%, magnesium hydrogen phosphate 13.5%, 8.2% composition fail to understand.PLC starts complex acid process, and acid solution tank injects acetic acid 0.32t(acetic acid content >=99.5% through conveyer device), oxalic acid 0.24t(oxalic acid content >=99%), citric acid 0.08t(citric acid content >=99%) and, after dilute, prepare solution 18m3, acid solution pH value is 1.24.After this filter pressing terminates; modified mud is squeezed into another filter press and is ensured normal production; this TV station filter press stop cleaning filter cloth; acid solution is squeezed into filter press by acid filling pump; pressure about 0.3Mpa in holding frame; pickle reflux pump is back to diluted acid reuse tank by crossing plate cleaning acid solution; cross stream precipitation about 10min; supernatant returns acid solution tank; realizing dynamic pickling, pickling about 2h completes filter cloth and cleans, and filter cloth and the dirty shape thing between the aquaporin on filter press filter board disappear, loosen; filter cloth recovers resilient flexible, and now cleaning acid solution pH value is 3.64.Impurity is regularly precipitated removal by diluted acid reuse tank, is generally 3 ~ 5 cleaning frequencies, and impurity liquid is used for the modified dehydration of mud, can significantly reduce moisture content of the cake.Attachment between filter cloth surface and lining cloth is removed further, remains acid solution simultaneously and be rinsed totally between fiber cloth and between conveyance conduit, and inlet amount promotes 16.8%, and mud extraction moisture content of the cake reduces by 3.4%.
Claims (5)
1. for cleaning the device of mud sheet frame dehydration filter cloth, it is characterized in that: include the acid solution tank connected by pipeline and valve, diluted acid return tank and filter press, it is provided with acid filling pump between described acid solution tank and filter press, it is provided with diluted acid reflux pump between described diluted acid return tank and described filter press, it is characterized in that: described filter press is at least provided with two, also include depositing between acid, ortho acid is delivered in described acid solution tank by conveyer device between acid and configures acid solution by described depositing, supernatant diluted acid reflux pump it is provided with between described acid solution tank and described diluted acid return tank, the bottom of described diluted acid return tank is provided with scraper, described diluted acid return tank is provided with alkali and adds mouth, described diluted acid return tank is also associated with the modified pond of mud, the modified pond of described mud is connected with described filter press.
2. the device for cleaning mud sheet frame dehydration filter cloth according to claim 1, it is characterized in that: described in deposit and between acid, include acetic acid tank, oxalic acid container, citric acid container, described conveyer device includes the liquid dosing pump being arranged between described acetic acid tank and described acid solution tank, the spiral solid drug feeding device being arranged between described oxalic acid container and described acid solution tank, the spiral solid drug feeding device that is arranged between described citric acid container and described acid solution tank.
3. the device for cleaning mud sheet frame dehydration filter cloth according to claim 1, it is characterised in that: it is provided with oar blade type dilution agitator in described acid solution tank.
4. the device for cleaning mud sheet frame dehydration filter cloth according to claim 1, it is characterised in that: it is provided with overflow pipe between described acid solution tank and described diluted acid return tank.
5. the device for cleaning mud sheet frame dehydration filter cloth according to claim 2, it is characterized in that: described acid solution tank, diluted acid return tank are respectively arranged with acidometer, being provided with pressure controller in described filter press, described acidometer, liquid dosing pump, spiral solid drug feeding device, acid filling pump, diluted acid reflux pump, supernatant diluted acid reflux pump, pressure controller electricly connect with PLC respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620052963.0U CN205340260U (en) | 2016-01-20 | 2016-01-20 | A device for rinsing mud sheet frame dehydration filter cloth |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620052963.0U CN205340260U (en) | 2016-01-20 | 2016-01-20 | A device for rinsing mud sheet frame dehydration filter cloth |
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| CN205340260U true CN205340260U (en) | 2016-06-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112604505A (en) * | 2020-12-28 | 2021-04-06 | 江苏新时膜科技有限公司 | Flat ceramic membrane cleaning device and using method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112604505A (en) * | 2020-12-28 | 2021-04-06 | 江苏新时膜科技有限公司 | Flat ceramic membrane cleaning device and using method thereof |
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