CN104788002A - Sludge pre-treatment equipment - Google Patents
Sludge pre-treatment equipment Download PDFInfo
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- CN104788002A CN104788002A CN201510151107.0A CN201510151107A CN104788002A CN 104788002 A CN104788002 A CN 104788002A CN 201510151107 A CN201510151107 A CN 201510151107A CN 104788002 A CN104788002 A CN 104788002A
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Abstract
The invention discloses brand-new sludge pre-treatment equipment. For the characteristics that paper mill sludge is high in fiber content and large in compression ratio, the mode that chemical conditioning and mechanical dehydration are combined is adopted, the operation process that sectional feeding is combined with gradient pressure change is adopted to continuously filter and dehydrate sludge in a multi-stage and multi-batch manner, the defect that sludge cakes cannot be thoroughly filtered by using conventional equipment is solved, the water content of the sludge cakes can be effectively reduced by using the sludge pre-treatment equipment, the weight of sludge can be reduced, and the sludge resource development can be promoted.
Description
Technical field
The present invention relates to technical field of sludge treatment, particularly relate to a kind of paper mill sludge pre-processing device.
Background technology
In recent years, the construction speed of wastewater treatment in China factory is very fast, takes on a certain scale.Under policy pulls, also performance is positive on construction of wastewater treatment plant for each place Government and enterprise, but foundation of investment for many years does not all design sludge treatment, to such an extent as to mud is not when obtaining properly disposing, cause secondary pollution, make sewage disposal lose meaning to a certain extent.
Paper industry belongs to heavy polluted industry, the mud that its waste water produced and adjoint wastewater treatment produce has become serious environmental pressure, according to incompletely statistics, there is nearly 683 of Sewage factory in the current whole nation, papermaking wastewater centralized treatment rate is about 25.3%, produces moisture wet mud year more than 1,500 ten thousand tons.And sewage and mud are two systems of contaminated solution problem tight association of equal importance.Specific resistance to filtration is that sewage disposal is able to the final guarantee implemented.In developed country, specific resistance to filtration is extremely important link, and its investment accounts for the 50-70% of sewage work's gross investment.And the sewage disposal that China is early stage, owing to there is no strict mud discharging supervision, common sewage and sludge treatment unit to be peeled away, simply simplifying as much as possible to pursue, even the wet mud not doing any process arbitrarily being transported outward, simple landfill or stacking, bring the potential safety hazard that can not be ignored to ecotope.
The greatest problem that sludge treatment faces is, in mud, water ratio is too high, cause sludge volume excessive, be difficult to transport and process, therefore the problem of sludge treatment most critical how to be dewatered, and research shows that sludge volume shortens about 1/3rd of primary sludge into when the water ratio of mud is reduced to 98.5% from 99.5%, being down to 95%(solid content is again 5%) time, the volume of mud boils down into about 1/10th of primary sludge.Therefore, if the water ratio in mud can be reduced, the workload so in subsequent disposal can reduce greatly, reduces the processing cost of mud and intractability and increases work efficiency.General mechanical system dehydration in prior art, conventional mechanical dewatering equipment has vacuum filtration, plate-and-frame filter press, belt filter press and centrifuge etc., by applying pressure to mud, water in mud is extruded, but moisture exists as Bound moisture, capillary water etc. with various states in paper mill sludge, mud granule has complicated structure, simple dependence mechanical pressure can only remove a part of water, and most of water is still present in mud with combined; Therefore before sludge dewatering or dehydration time add chemical reagent and carry out the dewatering efficiency that chemical conditioning can reach higher, general conventional chemical reagent comprises organic high-molecular coagulant adopting and inorganic coagulant, conventional organic polymer coagulating agent has polyacrylamide, and inorganic coagulant has aluminum chloride, iron(ic) chloride, polymerize aluminum chloride, aluminium silicate polymer, aluminium iron polychloride etc.; But research display, adds amendment and can only improve dewatering speed, increase sludge dewatering amount is not too many; Single coagulating agent can only for the water generation effect of one or both types in paper mill sludge, and reality is limited on dehydrating amount impact; Have technology that is inorganic and organic coagulants collocation use in prior art, but the technical scheme retrieved at present all do not possess the ability comprehensively removing various types of water, does not increase significantly the amount of removing of water yet; Therefore in the urgent need to finding new conditioning medicament to change the degree of dehydration of paper mill sludge.
In addition, when using legacy equipment to carry out mechanical dehydration, mud cake extrudes by external force, and moisture wherein can be discharged by interfibrous passage; But mud granule can be got into interfibrous drainage channel, thus block drainage channel.After being full of mud in filter chamber, mud cake is thicker, and during dehydration, the drainage channel on mud cake surface gets clogged, and the water of mud cake inside just cannot be discharged, therefore more more difficult to later stage sludge dewatering, it is tens times of dehydration in early stage even hundreds of times that dehydration backward dehydro rate improves 5% cost that may spend and time.Chinese invention patent CN200810198537.8 discloses a kind of method of sludge dewatering, it adopts plate-and-frame filter press filter-press dehydration add auxiliary agent in mud after, mud injection pressure increases gradually, the sewage sludge being about to modulate injects pressure filter necessarily to enter mud pressure, when filling, filtrate delivery flow is V1; When filtrate delivery flow is lower than 1/2 V1, mud injection pressure improved, now filtrate delivery flow can increase to V2; Again when filtrate delivery flow is lower than 1/2 V2, then mud injection pressure is improved, be increased to setting pressure gradually in this way, stop charging and pressurize to during setting pressure, and then barrier film extruding; But the method needs to add auxiliary agent (5-10% of sludge quantity), indirectly increases treatment capacity; Pressure raises gradually, although can filtration resistance be reduced to a certain extent when starting, but owing to being a charging, filter cake extruding is insufficient, and the press filtration later stage still can exist filter cake channel block, the problem that filtration resistance raises, dehydrating effect improves limited compared with constant pressure formula press filtration mode, and this invention adopts the pressure filter of ad hoc structure just can reach above-mentioned effect, suitability is poor, cannot be applied on conventional pressure filter.
Therefore the present invention is for overcoming above-mentioned defect, for paper mill sludge feature, propose a kind of brand-new sludge pretreatment equipment, they are many for paper mill sludge fibre content, the feature that compression ratio is large, the mode changed in conjunction with pressure step by sectional feeding also adds special amendment, continous way is carried out to mud, multistage, multiple batches of filter dehydration, solve legacy equipment sludge cake and filter halfway defect, amendment wherein used can improve sludge dewatering amount and rate of water loss, it is according to the flocculating properties of different coagulants kind, comprise molecular structure, the physico-chemical property such as electron cloud structure and the characteristic of functional group that has, work in coordination with from enhancing molecule, promote to set out in the aspects such as component electron framework optimization, existence etc. in conjunction with water in paper mill sludge is many-sided to be considered, select the coagulating agent component with specific cooperation and reinforcing effect removed being suitable for all kinds of water in mud, the amendment of above-mentioned coagulating agent composition greatly can promote removing of water in paper mill sludge in conjunction with novel dewatering process, the water ratio of effective reduction sludge cake, be conducive to sludge reduction, promote recycling sludge process.
Summary of the invention
The present invention proposes a kind of sludge pretreatment equipment, it comprises the sludge condensation system, sludge conditioning system, deep dehydration system for sludge and the mud discharging system that are linked in sequence; The paper mill sludge that wherein sludge condensation system utilizes sludge thickener to be produced by papermaking wastewater treatment system carries out preliminary thickening, and described sludge thickener comprises the mud import on body top, pond and the thickened sludge outlet of bottom; Sludge conditioning system comprises coagulant dosage device and sludge conditioning pond, from the thickened sludge of sludge condensation system through transferpump by Cemented filling to sludge conditioning pond entrance, coagulating agent is joined in sludge conditioning pond by the medicament storage tank in coagulant dosage device and dosing pump and mixes with thickened sludge, and the mud after chemical conditioning is got rid of to follow-up deep dehydration system for sludge by the sludge outlet in sludge conditioning pond; Deep dehydration system for sludge comprises desiccation machine, pan feeding pump, dewatered sludge delivery system and clean water basin, wherein the sludge inlet of desiccation machine connects the sludge outlet in sludge conditioning pond by pan feeding pump, and the mud cake after mummification dehydration is drained into dewatered sludge delivery system by the cake outlet of desiccation machine and is transported in mud discharging system and processes further; Described desiccation machine adopts staged to filter squeezing process, adopts the diaphragm type plate-and-frame filter press comprising air compression system, vacuum system, hydraulic efficiency system, hot water boiler and squeezing water tank.
Described coagulating agent is composed of the following components: inorganic coagulant, organic coagulants, biological coagulating agent, tensio-active agent, activator and agglomerator, and the dosage of coagulating agent is preferably the 0.1-3%(weight percent of thickened sludge amount);
Described staged filters squeezing processing step: join in diaphragm type plate-and-frame filter press by mud after conditioning by feed pipe, when feed pressure is to 0.6MPa, stops charging, applies 1.0MPa pressure dehydration 5-10 minute; To dewater rear continuation charging, when feed pressure reaches 1.2MPa, stopped charging, applied the dewatering pressure dehydration 10-15 minute of 1.4MPa; Continue charging, when feed pressure reaches 1.6MPa, stop charging, apply the dewatering pressure dehydration 10-15 minute of 1.8MPa; Continue charging, when feed pressure reaches 2.0MPa, stop charging, dewater 10-15 minute under 2.0MPa pressure.
As preferably, inorganic coagulant of the present invention preferably includes the inorganic salt of iron or aluminium;
Described organic coagulants preferably includes the organic coagulants of cation-modified group; Further organic coagulants preferably includes cationic high-molecular organic coagulants or Amphiphatic high polymer organic coagulants; Because mud is usually with negative charge, therefore selects high-molecular coagulant adopting with cation group to neutralize above-mentioned negative charge, mud granule is adsorbed on above-mentioned cation group and forms large flco;
Described biological coagulating agent can be selected NOC-1 coagulating agent or cultivate biological coagulating agent with P.Alcaligene bacterium, further described microorganism coagulating agent preferably filters out the biological inoculum with good flocculence from the supernatant liquor of the aerobic activated sludge of paper waste generation, and its screening method can adopt biological coagulating agent cultural method conventional in prior art;
The preferred high molecular amphoterics of described tensio-active agent, more preferably positively charged ion ctab surface promoting agent or palmityl trimethyl ammonium chloride; The both sexes that tensio-active agent has and solublization, it has good extraction effect to the outer organism of mud born of the same parents, and under charge neutrality effect and Long carbon chain structure, tensio-active agent can reduce mud flco negative charge, and by Long carbon chain, mud is re-united, the dewatering of mud is greatly improved;
The preferred zinc salt of described activator or mantoquita, as zinc chloride, zinc sulfate, cupric chloride etc.; Activator can increase mud space, improves the size of sludge water circulation road, is conducive to removing of surface water and interstitial water, adds salt and mud extracellular salinity can be made to improve, be beneficial to outer the blending of water in born of the same parents and remove;
The preferred solid slag of described agglomerator, comprise the hard particles such as flyash, quartz sand, slag, it can improve the gap between mud granule, the particle collision probability that to add when making press filtration or mechanical dehydration of hard particles increases, and extrudes further or causes breaking thus promoting removing of Bound moisture in cell of cell;
The weight proportion preferred inorganic coagulant 10-40% of each component of above-mentioned coagulating agent, organic coagulants 10-40%, biological coagulating agent 5-20%, tensio-active agent 5-10%, activator 5-10%, agglomerator 5-10%;
Further preferred inorganic coagulant 25%, organic coagulants 25%, biological coagulating agent 20%, tensio-active agent 10%, activator 10%, agglomerator 10%;
The working process of dehydration and drying step of the present invention is: real-time feed pressure is sent in the PLC of desiccation machine by the pressure transmitter on feed pipe, shows pressure by touch-screen.Once reach the feed pressure value of setting, fresh feed pump quits work immediately, and material inlet valve is closed, and desiccation machine valve opening, desiccation machine is started working.When the dewatering pressure of setting to be achieved and dewatering time, desiccation machine quits work, desiccation machine valve closes, and material inlet valve is opened, and fresh feed pump is started working.So repeatedly, whole dehydration divides multistage staged dehydration, all by PLC Automated condtrol, improves the stability of equipment, significantly reduces cost of labor.
Sludge pretreatment equipment of the present invention has the following advantages:
1, the present invention adopts the mode that chemical conditioning is combined with mechanical dehydration, realizes mud high-efficiency pretreatment, and compared with single processing mode, efficiency is high, effective;
2, mechanical dewatering equipment of the present invention adopts multistage feeding mode, changes the filter cake that a traditional charging causes blocked up, insufficient shortcoming of dewatering; Pressure incrementally dewatering process carries out multistage filter dehydration by improving pressure step by step to mud, in conjunction with multistage feeding technique, thoroughly solve traditional technology sludge cake and squeeze halfway defect, effectively reduce the water ratio of sludge cake, be conducive to sludge reduction, promote recycling sludge process; Multistage feeding in conjunction with the technique of step supercharging, utilize in secondary feeds instantaneous deviate from the surging force of water rinse the passage be prematured by solids in mud fiber, reduce the problem of dehydration channel block, be conducive to the dehydration rate further improving mud;
3, the coagulating agent that the present invention uses adds inorganic coagulant as skeleton, making mud flco keep porous when dewatering, stoping the collapse of flco, reduce the compressibility of mud cake; Add organic coagulants and then improve mud granule surface charge and interfacial activity, sludge filtration speed can be increased substantially; The biological coagulating agent added can also reduce use cost under the prerequisite ensureing flocculating effect, and the environment-friendly degradable of biological coagulating agent own, utilizes the floc microbe contained in indigenous bacterium especially, and it has better adaptability to paper mill sludge;
4. coagulating agent of the present invention has surfactivity uniquely, it can reduce surface tension, the Long carbon chain structure had can by adsorption bridging effect, molecules a large amount of in mud is passed through throwing out, flocculate into the closely knit large floc sedimentation of diameter at 5-10mm, thus greatly reduce the quantity of kapillary in mud flco, and the radius of kapillary is increased; Add activator and agglomerator, produce with above-mentioned coagulating agent and act synergistically, the effect of dewatering synergy can be realized, be conducive to the function and efficacy giving full play to each coagulating agent; Add inorganic hard particle, utilize the extrusion and collision between particle that water in born of the same parents can be made better to discharge, and under the mating reaction of other coagulating agent, the water deviate from is changed into free-water, thus the compound use of multiple coagulating agent can improve the dewatering of mud well
5. sludge pretreatment equipment of the present invention, working cost is low, and dehydrating effect is good, greatly can alleviate the burden of sludge treatment.
Accompanying drawing explanation
Fig. 1 is the schema of sludge pretreatment equipment of the present invention.
Fig. 2 is structure and the principle of work schematic diagram of sludge pretreatment equipment of the present invention
Fig. 3 is the operation chart of the staged filtration squeezing process that in embodiment 2, preferred desiccation machine adopts.
Embodiment
Embodiment 1
Adopt the treatment facility shown in Fig. 1 to carry out pre-treatment to paper mill sludge, as depicted in figs. 1 and 2, the sludge pretreatment equipment that the present invention adopts comprises the sludge condensation system, sludge conditioning system, deep dehydration system for sludge and the mud discharging system that are linked in sequence; The paper mill sludge that wherein sludge condensation system utilizes sludge thickener to be produced by papermaking wastewater treatment system carries out preliminary thickening, and described sludge thickener comprises the mud import on body top, pond and the thickened sludge outlet of bottom; Sludge conditioning system comprises coagulant dosage device and sludge conditioning pond, from the thickened sludge of sludge condensation system through transferpump by Cemented filling to sludge conditioning pond entrance, coagulating agent is joined in sludge conditioning pond by the medicament storage tank in coagulant dosage device and dosing pump and mixes with thickened sludge, and the mud after chemical conditioning is got rid of to follow-up deep dehydration system for sludge by the sludge outlet in sludge conditioning pond; Deep dehydration system for sludge comprises desiccation machine, pan feeding pump, dewatered sludge delivery system and clean water basin, wherein the sludge inlet of desiccation machine connects the sludge outlet in sludge conditioning pond by pan feeding pump, and the mud cake after mummification dehydration is drained into dewatered sludge delivery system by the cake outlet of desiccation machine and is transported in mud discharging system and processes further; Described desiccation machine adopts staged to filter squeezing process, adopts the diaphragm type plate-and-frame filter press comprising air compression system, vacuum system, hydraulic efficiency system, hot water boiler and squeezing water tank.
Adopt the step of sludge pretreatment device processes paper mill sludge of the present invention as follows: (1) by water ratio be 99.2% the mud that produces of papermaking wastewater treatment system enter in sludge condensation system and carry out sludge condensation, the thickened sludge water ratio of acquisition is 95%; (2) mud after concentrated is entered the chemical conditioning carrying out mud in sludge conditioning system, wherein coagulating agent by dosing pump be transported in sludge conditioning pond with concentrate after mud mix, the dosage of coagulating agent is 0.1% of thickened sludge weight; (3) the rear mud of conditioning is by carrying out dehydration and drying in pan feeding pump delivery to anhydration system, described anhydration system adopts staged filtration squeezing process to carry out processed, wherein the concrete operation step of staged filtration squeezing process is: join in diaphragm plate paper blotter press by mud after conditioning by feed pipe, when feed pressure is to 0.6MPa, stop charging, apply 1.0MPa pressure dehydration 5-10 minute; To dewater rear continuation charging, when feed pressure reaches 1.2MPa, stopped charging, applied the dewatering pressure dehydration 10-15 minute of 1.4MPa; Continue charging, when feed pressure reaches 1.6MPa, stop charging, apply the dewatering pressure dehydration 10-15 minute of 1.8MPa; Continue charging, when feed pressure reaches 2.0MPa, stop charging, dewater 10-15 minute under 2.0MPa pressure.(4) after mummification, mud is discharged by dewatered sludge delivery system, is further processed;
The coagulating agent that sludge conditioning system adopts by weight percent be the inorganic coagulant of 25%, organic coagulants, the biological coagulating agent of 20%, tensio-active agent, the activator of 10%, the agglomerator of 10% of 10% of 25% mix;
Wherein inorganic coagulant can select the inorganic salt of iron or aluminium, as Tai-Ace S 150, aluminum chloride, ferrous sulfate, iron protochloride, polymerize aluminum chloride etc.; Organic coagulants can select the organic coagulants with cation-modified group, as Poly Dimethyl Diallyl Ammonium Chloride, cationic polyacrylamide, and cationic modified starch etc.; Biological coagulating agent can be selected NOC-1 coagulating agent or cultivate biological coagulating agent with P.Alcaligene bacterium, filter out the biological inoculum with good flocculence the supernatant liquor of the aerobic activated sludge that also can produce from paper waste, its screening method can adopt biological coagulating agent cultural method conventional in prior art; Tensio-active agent is high molecular amphoterics, as positively charged ion ctab surface promoting agent or palmityl trimethyl ammonium chloride; Activator can select zinc salt or mantoquita, as zinc chloride, and zinc sulfate, cupric chloride etc.; Agglomerator can select solid slag, as hard particles such as flyash, quartz sand, slags.
Embodiment 2
The treatment facility of embodiment 2 is with embodiment 1, difference is the squeezing process (see Fig. 3) that sludge conditioning system coagulating agent used and desiccation machine adopt, wherein embodiment 2 coagulating agent used by weight percent be 40% inorganic coagulant, 10% organic coagulants, 20% biological coagulating agent, the tensio-active agent of 10%, the activator of 10% and 10% agglomerator mix, dosage is 3% of thickened sludge weight; The concrete operation step of desiccation machine is: join in diaphragm type plate-and-frame filter press by mud after conditioning by feed pipe, when feed pressure is to 0.6MPa, stops charging, applies 1.0MPa pressure and dewaters 10 minutes; Dewatered rear continuation charging, stop charging when feed pressure reaches 1.2MPa, the dewatering pressure applying 1.4MPa dewaters 10 minutes; Continue charging, stop charging when feed pressure reaches 1.6MPa, the dewatering pressure applying 1.8MPa dewaters 10 minutes; Continue charging, when feed pressure reaches 2.0MPa, stop charging, dewater 10 minutes under 2.0MPa pressure.
The water ratio of mud after the mummification of mensuration above-described embodiment 1 and 2, moisture percentage in sewage sludge is reduced to 22-31%, and compared with the sludge treatment technique of routine, water ratio can reduce 30-40%, and the dewatered sludge obtained more easily transports when subsequent disposal, and cost is lower.
Above-described dewatering technology of mud; it is only the present invention's preferably embodiment; but protection scope of the present invention is not limited to this; anyly be familiar with those skilled in the art in the scope that the present invention discloses; can expect that same or analogous change or substitute mode are all in protection scope of the present invention easily, the content that the present invention does not do to state in detail belongs to the common practise of those skilled in the art.
Claims (10)
1. a sludge pretreatment equipment, it comprises the sludge condensation system, sludge conditioning system, deep dehydration system for sludge and the mud discharging system that are linked in sequence; The mud that wherein sludge condensation system utilizes sludge thickener to be produced by Waste Water Treatment carries out preliminary thickening, and described sludge thickener comprises the mud import on body top, pond and the thickened sludge outlet of bottom; Sludge conditioning system comprises coagulant dosage device and sludge conditioning pond, from the thickened sludge of sludge condensation system through transferpump by Cemented filling to sludge conditioning pond entrance, coagulating agent is joined in sludge conditioning pond by the medicament storage tank in coagulant dosage device and dosing pump and mixes with thickened sludge, and the mud after chemical conditioning is got rid of to follow-up deep dehydration system for sludge by the sludge outlet in sludge conditioning pond; Deep dehydration system for sludge comprises desiccation machine, pan feeding pump, dewatered sludge delivery system and clean water basin, wherein the sludge inlet of desiccation machine connects the sludge outlet in sludge conditioning pond by pan feeding pump, and the mud cake after mummification dehydration is drained into dewatered sludge delivery system by the cake outlet of desiccation machine and is transported in mud discharging system and processes further; Described desiccation machine is the diaphragm type plate-and-frame filter press comprising air compression system, vacuum system, hydraulic efficiency system, hot water boiler and squeezing water tank, and it adopts staged to filter squeezing process.
2. sludge pretreatment equipment as claimed in claim 1, described coagulating agent is composed of the following components: inorganic coagulant, organic coagulants, biological coagulating agent, tensio-active agent, activator and agglomerator, and the dosage of coagulating agent is the 0.1-3%(weight percent of thickened sludge amount).
3. sludge pretreatment equipment as claimed in claim 1, described staged filters squeezing process concrete steps: join in diaphragm type plate-and-frame filter press by mud after conditioning by feed pipe, when feed pressure is to 0.6MPa, stop charging, apply 1.0MPa pressure dehydration 5-10 minute; To dewater rear continuation charging, when feed pressure reaches 1.2MPa, stopped charging, applied the dewatering pressure dehydration 10-15 minute of 1.4MPa; Continue charging, when feed pressure reaches 1.6MPa, stop charging, apply the dewatering pressure dehydration 10-15 minute of 1.8MPa; Continue charging, when feed pressure reaches 2.0MPa, stop charging, dewater 10-15 minute under 2.0MPa pressure.
4. sludge pretreatment equipment as claimed in claim 2, described inorganic coagulant is the inorganic salt of iron or aluminium.
5. sludge pretreatment equipment as claimed in claim 2, described organic coagulants is the organic coagulants with cation-modified group.
6. sludge pretreatment equipment as claimed in claim 2, the biological coagulating agent that described biological coagulating agent is NOC-1 coagulating agent or cultivates with P.Alcaligene bacterium.
7. sludge pretreatment equipment as claimed in claim 2, described tensio-active agent is high molecular amphoterics.
8. sludge pretreatment equipment as claimed in claim 2, described activator is zinc salt or mantoquita.
9. sludge pretreatment equipment as claimed in claim 2, described agglomerator is flyash, quartz sand or slag.
10. the sludge pretreatment equipment as described in any one of claim 2-9, the weight proportion of each component of described coagulating agent is inorganic coagulant 10-40%, organic coagulants 10-40%, biological coagulating agent 5-20%, tensio-active agent 5-10%, activator 5-10%, agglomerator 5-10%.
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Cited By (6)
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| CN105366903A (en) * | 2015-12-15 | 2016-03-02 | 晋江市世龙厨房设备有限公司 | Dewatering regulating method for sludge |
| CN105366901A (en) * | 2015-12-15 | 2016-03-02 | 晋江市世龙厨房设备有限公司 | Sludge treatment method improving dehydration efficiency |
| CN105502861A (en) * | 2015-12-15 | 2016-04-20 | 南安市先创环保技术服务有限公司 | Sludge treatment device improving hydration efficiency |
| CN105541068A (en) * | 2015-12-15 | 2016-05-04 | 南安市先创环保技术服务有限公司 | Sludge treatment equipment for improving heavy metal removal efficiency |
| CN106277698A (en) * | 2016-08-26 | 2017-01-04 | 江苏理文造纸有限公司 | A kind of processing method of paper waste |
| CN111646670A (en) * | 2020-05-19 | 2020-09-11 | 上海凌逍环保科技有限公司 | Multistage dehydration method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105366903A (en) * | 2015-12-15 | 2016-03-02 | 晋江市世龙厨房设备有限公司 | Dewatering regulating method for sludge |
| CN105366901A (en) * | 2015-12-15 | 2016-03-02 | 晋江市世龙厨房设备有限公司 | Sludge treatment method improving dehydration efficiency |
| CN105502861A (en) * | 2015-12-15 | 2016-04-20 | 南安市先创环保技术服务有限公司 | Sludge treatment device improving hydration efficiency |
| CN105541068A (en) * | 2015-12-15 | 2016-05-04 | 南安市先创环保技术服务有限公司 | Sludge treatment equipment for improving heavy metal removal efficiency |
| CN105541068B (en) * | 2015-12-15 | 2018-09-04 | 南安市先创环保技术服务有限公司 | A kind of sludge treatment device improving removal efficiency of heavy metals |
| CN105502861B (en) * | 2015-12-15 | 2018-09-04 | 南安市先创环保技术服务有限公司 | A kind of sludge treatment device improving dehydration efficiency |
| CN105366901B (en) * | 2015-12-15 | 2018-09-04 | 晋江市世龙厨房设备有限公司 | A kind of method for sludge treatment improving dehydration efficiency |
| CN106277698A (en) * | 2016-08-26 | 2017-01-04 | 江苏理文造纸有限公司 | A kind of processing method of paper waste |
| CN111646670A (en) * | 2020-05-19 | 2020-09-11 | 上海凌逍环保科技有限公司 | Multistage dehydration method and device |
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| CN104788002B (en) | 2016-05-25 |
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