CN103030258A - Deep dehydration device and dehydration method for sludge - Google Patents
Deep dehydration device and dehydration method for sludge Download PDFInfo
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- CN103030258A CN103030258A CN2012105889588A CN201210588958A CN103030258A CN 103030258 A CN103030258 A CN 103030258A CN 2012105889588 A CN2012105889588 A CN 2012105889588A CN 201210588958 A CN201210588958 A CN 201210588958A CN 103030258 A CN103030258 A CN 103030258A
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- mud
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- 239000010802 sludge Substances 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000006297 dehydration reaction Methods 0.000 title abstract description 21
- 230000018044 dehydration Effects 0.000 title abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000003814 drug Substances 0.000 claims abstract description 19
- 230000003750 conditioning effect Effects 0.000 claims abstract description 18
- 230000008569 process Effects 0.000 claims abstract description 6
- 239000000126 substance Substances 0.000 claims description 48
- 230000008676 import Effects 0.000 claims description 16
- 239000000292 calcium oxide Substances 0.000 claims description 15
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 15
- 238000001914 filtration Methods 0.000 claims description 15
- 238000006116 polymerization reaction Methods 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 7
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims description 6
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 238000002203 pretreatment Methods 0.000 claims description 6
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 3
- 239000001110 calcium chloride Substances 0.000 claims description 3
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 3
- 229910001629 magnesium chloride Inorganic materials 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 239000012528 membrane Substances 0.000 abstract 2
- 230000001143 conditioned effect Effects 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- 238000003912 environmental pollution Methods 0.000 abstract 1
- 229920002401 polyacrylamide Polymers 0.000 description 13
- 230000000694 effects Effects 0.000 description 5
- 230000006872 improvement Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 229910001385 heavy metal Inorganic materials 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000010801 sewage sludge Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 241000244203 Caenorhabditis elegans Species 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 238000005341 cation exchange Methods 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
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- 238000005184 irreversible process Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
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- 229910021645 metal ion Inorganic materials 0.000 description 1
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- Treatment Of Sludge (AREA)
Abstract
The invention discloses a deep dehydration device and a dehydration method for sludge. The device comprises a concentration tank, a conditioning tank and a membrane press filter that are sequentially connected, wherein a medicine adding device is arranged above the conditioning tank, and the medicine adding device is connected with the conditioning tank. The dehydration method comprises the steps of: delivering the sludge to the concentration tank for pretreating, delivering to the conditioning tank to be conditioned with a conditioning agent, delivering to the membrane press filter for filter-pressing, and accomplishing a deep dehydration process of the sludge after the filter-pressing is accomplished. The device and the method have the advantages that the problem that the dehydrated sludge is higher in water content can be solved; the water content of the sludge dehydrated by the device reaches below 60%; requirements of the existing environmental protection policy and a future trend are met; the problems that a transportation load of the sludge is large and the sludge leaks in a transportation process are solved; a foundation is laid for the subsequent drying and resourceful treatment and disposal; the operation is simple; and as CaO is added in a sludge conditioning step, the water content of the sludge can be reduced, the sludge can be sterilized, and environmental pollution caused by the subsequent disposal can be reduced.
Description
Technical field
The invention belongs to domestic sludge deep dehydration technical field, be specifically related to a kind of sludge deep dehydrator and dewatering.
Background technology
Excess sludge conventional dehydration technique and the equipment of urban wastewater treatment firm are generally belt filter press, plate-and-frame filter press and centrifugal pressure filter etc.Wherein, the application with belt filter press accounts for the largest percentage.Above-mentioned several legacy equipment is 70-80% to the dehydrating effect of mud, and traffic capacity is larger, easy water clock in the transportation, the technical requirements that does not reach existing environmental protection policy.
The kind of mechanical dehydration can be divided into vacuum filtering and dewatering, filter-press dehydration and centrifuge dehydration three major types by dewatering Principle.Vacuum filtering and dewatering system places mud on the porousness filtration medium, causes vacuum at the medium opposite side, with the moisture in the mud by force " suctions ", makes it to separate with mud, thereby realizes dewatering.Equipment commonly used has various forms of vacuum drum filter and dehydration machines.Filter-press dehydration system places mud on the filtration medium, in mud one side mud is exerted pressure, and makes by force moisture pass through medium, makes it to separate with mud, thereby realizes dehydration, and equipment commonly used has various forms of band press filter dewatering machines and plate-and-frame filter press.Thereby centrifuge dehydration system realizes dehydration by being separated from each other of official post of the centrifugal force of moisture and mud granule, and equipment commonly used has various forms of centrifuges.More than several dehydration equipments all to have certain use historical, but there is very big difference in concrete service condition.The sewage work of early stage construction adopts the vacuum filtering and dewatering machine mostly, but because its moisture content of the cake is higher, noise is large, it is large to take up an area, and the larger improvement of its structure and performance nothing itself, twentieth century seldom adopted since the eighties.Filter press water extracter moisture content of the cake is minimum, thereby is adopting always.But this water extracter is intermitten service, and efficient is low, and troublesome poeration, and maintenance is very large, so use not generally, only uses in the very low situation of mud extraction water ratio requiring.Belt filter press is the dehydration equipment of commonly using in recent years, it is that pressure is applied on the filter cloth, makes sludge dewatering, this equipment claimed frequent cleaning filter cloth with pressure and the tension force of filter cloth, back-flushing consumption sewage large, that secondary generates in back flushing process strengthens, and dehydrating effect is unsatisfactory.From some equipment users that understand, the user is very dissatisfied to the dewatering of this equipment.The dehydrating effect of centrifugal-dehydration device is relatively good, but its current consumption is large, and noise is also large.From the angle of noise, it is a larger sound pollution equipment.In addition, the shortcoming of this equipment maximum is: in case break down, be difficult to accurately grasp spindle balance during maintenance, maintenance difficulty is very large, and in a single day axis produces balance deviation, and is very big to the damage of equipment.Aggregate analysis, originally used dehydration equipment is unsatisfactory in the water treatment market.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the first purpose of the present invention has been to provide a kind of moisture percentage in sewage sludge, easy sludge deep dehydrator of application that can reduce after dewatering.
The second purpose of the present invention has been to provide a kind of method of utilizing above-mentioned sludge deep dehydrator to dewater.
Technical scheme: in order to solve above-mentioned the first purpose, the technical solution adopted in the present invention is as follows: a kind of sludge deep dehydrator, comprise the concentration basin, conditioner, the diaphragm filter press that connect successively, be provided with chemicals dosing plant above described conditioner, described chemicals dosing plant is connected with described conditioner.
As improvement of the present invention, described chemicals dosing plant comprises the first chemicals dosing plant, the second chemicals dosing plant and the 3rd chemicals dosing plant, and each chemicals dosing plant all links to each other with conditioner.
Among the present invention, described the first chemicals dosing plant is the PAM(polyacrylamide) chemicals dosing plant; Described the second chemicals dosing plant is the chemicals dosing plant that calcium chloride, magnesium chloride and polymerize aluminum chloride mixture are housed; The 3rd chemicals dosing plant is the calcium oxide chemicals dosing plant.
Improvement as the first chemicals dosing plant among the present invention, described the first chemicals dosing plant comprises medicament storehouse, high-order storage tank, mixing tank and transferpump, and the import of described high-order storage tank links to each other with described conveying pump outlet, the outlet of high-order storage tank links to each other with the import of described mixing tank; The import of described transferpump links to each other with described medicament storehouse.
In order to promote PAM to enter easily in the mixing tank and PAM fully to be mixed with water, above-mentioned mixing tank comprises body, and described chamber body is separated into dissolving storehouse and solution storehouse from top to bottom successively, is connected with liquid delivery tube between described dissolving storehouse and solution storehouse; Be provided with the powder import in described dissolving storehouse, described high-order storage tank communicates with described dissolving storehouse by the powder import; External water supply line on described body, described water supply line communicates with described dissolving storehouse, in described dissolving storehouse agitator is housed, and in the bottom in described solution storehouse the drain pipe that links to each other with described conditioner is installed.
In order to control dosing speed, liquid-outlet valve is installed all on described drain pipe and liquid delivery tube.
In order to solve above-mentioned the second purpose, the technical solution adopted in the present invention is as follows: the method for utilizing described sludge deep dehydrator to dewater, the method comprises the steps:
1) mud is delivered to concentration basin and carries out pre-treatment;
2) mud that pre-treatment is obtained is sent in the conditioner, then adds the conditioning medicament in conditioner, stirs;
3) with step 2) in be delivered to through the mud of conditioning after the chemicals treatment and carry out press filtration in the diaphragm filter press, namely finish the deeply dehydrating sludge operation behind press filtration 45~60min.
Step 2) in, described conditioning medicament comprises PAM, polymerization AlCl
3, CaCl
2, MgCl
2And CaO, wherein the addition of PAM be over dry mud weight 3 ~ 6%, polymerization AlCl
3Addition be over dry mud weight 2 ~ 5%, CaCl
2Addition be over dry mud weight 0.1 ~ 0.5%, MgCl
2Addition be over dry mud weight 0.2 ~ 0.5%, the addition of CaO is 0.2 ~ 0.5 ‰ of over dry mud weight.It is 0% mud that above-mentioned over dry mud refers to water ratio.
Step 2) in, at first adds PAM, then add polymerization AlCl
3, CaCl
2And MgCl
2Mixture, add at last CaO.
In the step 3), the mud after the conditioning chemicals treatment is delivered in the process of diaphragm filter press, pressure rises to 1.4MPa gradually from 0.6 MPa.
Completing steps 1) time to a whole set of operation of step 3) is 6 hours.
The ultimate principle of this deep dehydration method for sludge is as follows:
(1) this dewatering principle is to mate from mechanism, medicament, machinery.Institute's adding medicine not only can be by sequestering action except the metal ion in anhydrating, and can also the particle coagulation in the water be become larger flco and coagulation gets off by charge neutrality effect, hydrogen bond action and bridging action.
(2) inorganic components in the medicament is adsorbed coagulation to the mud particulate, exists tradable hydrated cation in its composition (such as Ca
2+, Na
+, K
+) and middle water etc., this constructional feature has just determined that it has swellability and larger inside and outside surface-area in the perpendicular slice direction, make it have stronger absorption property and cation exchange property, thereby the metallic cation in the water and particulate all had certain adsorptivity, and its nano level particle diameter makes its outer surface area become large, absorption property to be greatly improved.
(3) after the mud dosing, the colloidal structure in the mud is because of dosing generation chemical reaction, forms crystallization and grows up at glue nuclear, and planar water is converted into crystalline texture water, has namely realized the solid state of sanitary sewage mud after crystalline texture forms.Guaranteed the unlikely twice transformation of mud after the modification thereby the process of this solid state is irreversible process, and after mud formed crystalline structure, its contained humidity can be separated rapidly.And, add properties-correcting agent has stabilization to part heavy metal in the mud effect, the active ingredient of properties-correcting agent and some the heavy metal ion generation chemical reaction in the mud, form the part of stable crystalline structure, form stable water-fast compound, heavy metal ion is free out to cause secondary pollution thereby reduced.
(4) mud after the modification is sent into the transfer pressure of 0.6~1.4MPa in the space between the polylith filter plate of diaphragm filter press, in mud is delivered to space internal procedure between the filter plate, namely there is part moisture to be filtered off, after carrying end, close the Mud-intake valve door of diaphragm filter press, start the press pump of diaphragm filter press, provide the pressure of 2.4MPa to make again press filtration of the mud in the space between the filter plate by press pump, obtain water ratio and be the half-dried mud cake below 60%.
Beneficial effect: compared with prior art, the invention has the advantages that: 1) can solve the higher problem of dehydrated sludge water ratio, adopt this device dehydrated sludge water ratio can reach 60%(wt) below, satisfies the requirement of existing environmental protection policy and future trend; And can also solve the problem 2 of water clock in mud traffic capacity and the transportation) dispose for follow-up mummification and recycling treatment and lay the first stone; 3) easy and simple to handle; 4) in the dewatering of the present invention, add CaO in the sludge conditioning stage, not only can reduce moisture percentage in sewage sludge, can also carry out disinfection to mud, reduce follow-up disposal to the pollution of environment.
Description of drawings
Fig. 1 is the structural representation of sludge deep dehydrator among the present invention.
Fig. 2 is the structural representation of mixing tank among the present invention.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the principle of the invention, can also make some modification and improvement, these also should be considered within the scope of protection of the present invention.
Embodiment 1: as depicted in figs. 1 and 2, a kind of sludge deep dehydrator, comprise concentration basin 1, conditioner 2, diaphragm filter press 4, concentration basin 1 is provided with mud import and outlet, the outlet of concentration basin 1 communicates by pipeline with the import of conditioner 2, and the outlet of conditioner 2 links to each other with diaphragm filter press 4 by fresh feed pump 3; Be provided with chemicals dosing plant above conditioner 2, chemicals dosing plant comprises the first chemicals dosing plant 5, the second chemicals dosing plant 6 and the 3rd chemicals dosing plant 7, and wherein the first chemicals dosing plant 5 is the PAM chemicals dosing plant; The second chemicals dosing plant 6 is for being equipped with the chemicals dosing plant of calcium chloride, magnesium chloride and polymerize aluminum chloride mixture; The 3rd chemicals dosing plant 7 is the calcium oxide chemicals dosing plant.
Above-mentioned the first chemicals dosing plant 5 comprises medicament storehouse 51, high-order storage tank 52, mixing tank and transferpump 53, and the import of high-order storage tank 52 links to each other with the outlet of transferpump 53; The import of transferpump 53 links to each other with medicament storehouse 51.Wherein mixing tank comprises body, and chamber body is separated into dissolving storehouse 54 and solution storehouse 55 from top to bottom successively, is communicated with by liquid delivery tube 59 between described dissolving storehouse 54 and the solution storehouse 55; Be provided with the powder import in dissolving storehouse 54, the exit of high-order storage tank 52 is connected with powder feed-pipe 57, this powder feed-pipe 57 stretches in the powder import, external water supply line on body, water supply line communicates with dissolving storehouse 54, dissolving is equipped with agitator 56 in the storehouse 54, so just powder can be fed in the dissolving storehouse 54 fully to have dissolved with water; The drain pipe 58 that links to each other with conditioner 2 is installed in the bottom in solution storehouse 55.On drain pipe 58 and liquid delivery tube 59, liquid-outlet valve is installed all.The second chemicals dosing plant 6 also all links to each other with conditioner 2 with the 3rd chemicals dosing plant 7 simultaneously.
Utilize the dewatering of above-mentioned sludge deep dehydrator, concrete steps are as follows:
1) mud is delivered to concentration basin and carries out pre-treatment; Adopt machinery concentrated, concentration time is 6 hours, moves under the normal temperature state.
2) mud that pre-treatment is obtained is sent in the conditioner, then adds the conditioning medicament in conditioner, stirs; Wherein, described conditioning medicament comprises PAM, polymerization AlCl
3, CaCl
2, MgCl
2And CaO,
Order of addition of ingredients is: at first add PAM, then add polymerization AlCl
3, CaCl
2And MgCl
2Mixture, add at last CaO; Wherein the addition of PAM be over dry mud weight 4%, polymerization AlCl
3Addition be over dry mud weight 3%, CaCl
2Addition be over dry mud weight 0.2%, MgCl
2Addition be over dry mud weight 0.3%, the addition of CaO is 0.4 ‰ of over dry mud weight; Above-mentioned over dry mud refers to needs the water-free state of lignin-sludge.
3) with step 2) in be delivered to through the mud of conditioning after the chemicals treatment and carry out press filtration in the diaphragm filter press, in pressure rises to space between the polylith filter plate that 1.4Mpa sends into mud diaphragm filter press gradually steadily from 0.6Mpa, in mud is delivered to space internal procedure between the filter plate, namely there is part moisture to be filtered off, after carrying end, close the Mud-intake valve door of diaphragm filter press, start the press pump of diaphragm filter press, provide the pressure of 2.4MPa to make again press filtration of the mud in the space between the filter plate by press pump, obtain water ratio behind press filtration 45~60min and be the half-dried mud cake below 60%, namely finish the deeply dehydrating sludge operation.
Finish above-mentioned steps 1) to time of a whole set of operation of step 3) be 6 hours.
After adopting aforesaid method, the water ratio of mud is processed to below 60%, water ratio can be reduced to 45% behind 2~3d natural air drying again; Sludge calorific value after the mummification can be used as low calorie fuels at 600~1500Kcal; The pathogenic agent clearances such as the roundworm egg in the mud, excrement colibacillus group reach more than 90%; Finished product mud ultimate compression strength is good, and rainwater soaks the indissoluble erosion, meets the water dissolution rate less than 5%.
Embodiment 2: substantially the same manner as Example 1, difference is the add-on of each medicament, is specially: the addition of PAM be over dry mud weight 3%, polymerization AlCl
3Addition be over dry mud weight 2%, CaCl
2Addition be over dry mud weight 0.1%, MgCl
2Addition be over dry mud weight 0.2%, the addition of CaO is 0.2 ‰ of over dry mud weight.According to the method for present embodiment, the water ratio that obtains mud cake behind the press filtration 60min is 55%.
Embodiment 3: substantially the same manner as Example 1, difference is the add-on of each medicament, is specially: the addition of PAM be over dry mud weight 6%, polymerization AlCl
3Addition be over dry mud weight 5%, CaCl
2Addition be over dry mud weight 0.5%, MgCl
2Addition be over dry mud weight 0.5%, the addition of CaO is 0.5 ‰ of over dry mud weight.According to the method for present embodiment, the water ratio that obtains mud cake behind the press filtration 60min is 57%.
Claims (10)
1. sludge deep dehydrator, it is characterized in that, comprise the concentration basin (1), conditioner (2), the diaphragm filter press (4) that connect successively, be provided with chemicals dosing plant in the top of described conditioner (2), described chemicals dosing plant is connected with described conditioner (2).
2. sludge deep dehydrator according to claim 1 is characterized in that, described chemicals dosing plant comprises the first chemicals dosing plant (5), the second chemicals dosing plant (6) and the 3rd chemicals dosing plant (7), and each chemicals dosing plant all links to each other with conditioner (2).
3. sludge deep dehydrator according to claim 1 and 2 is characterized in that, described the first chemicals dosing plant (5) is the PAM chemicals dosing plant; Described the second chemicals dosing plant (6) is for being equipped with the chemicals dosing plant of calcium chloride, magnesium chloride and polymerize aluminum chloride mixture; The 3rd chemicals dosing plant (7) is the calcium oxide chemicals dosing plant.
4. sludge deep dehydrator according to claim 3, it is characterized in that, described the first chemicals dosing plant (5) comprises medicament storehouse (51), high-order storage tank (52), mixing tank and transferpump (53), and the import of described high-order storage tank (52) links to each other with the outlet of described transferpump (53), the outlet of high-order storage tank (52) is connected with the import of described mixing tank; The import of described transferpump (53) links to each other with described medicament storehouse (51).
5. sludge deep dehydrator according to claim 4, it is characterized in that, described mixing tank comprises body, described chamber body is separated into dissolving storehouse (54) and solution storehouse (55) from top to bottom successively, is connected with liquid delivery tube between described dissolving storehouse (54) and solution storehouse (55); Be provided with the powder import in described dissolving storehouse (54), described high-order storage tank (52) communicates with described dissolving storehouse (54) by the powder import; External water supply line on described body, described water supply line communicates with described dissolving storehouse (54), agitator (56) is housed in described dissolving storehouse (54), in the bottom in described solution storehouse (55) drain pipe that links to each other with described conditioner (2) is installed, liquid-outlet valve all is installed on described drain pipe and liquid delivery tube.
6. utilize the method that each described sludge deep dehydrator dewaters among the claim 1-5, it is characterized in that the method comprises the steps:
1) mud is delivered to concentration basin and carries out pre-treatment;
2) mud that pre-treatment is obtained is sent in the conditioner, then adds the conditioning medicament in conditioner, stirs;
3) with step 2) in be delivered to through the mud of conditioning after the chemicals treatment and carry out press filtration in the diaphragm filter press, namely finish the deeply dehydrating sludge operation after the press filtration.
7. the sludge deep dehydrator according to claim 6 method of dewatering is characterized in that step 2) in, described conditioning medicament comprises PAM, polymerization AlCl
3, CaCl
2, MgCl
2And CaO, wherein the addition of PAM be over dry mud weight 3 ~ 6%, polymerization AlCl
3Addition be over dry mud weight 2 ~ 5%, CaCl
2Addition be over dry mud weight 0.1 ~ 0.5%, MgCl
2Addition be over dry mud weight 0.2 ~ 0.5%, the addition of CaO is 0.2 ~ 0.5 ‰ of over dry mud weight.
8. the sludge deep dehydrator according to claim 7 method of dewatering is characterized in that step 2) in, at first add PAM, then add polymerization AlCl
3, CaCl
2And MgCl
2Mixture, add at last CaO.
9. the sludge deep dehydrator according to claim 6 method of dewatering is characterized in that, in the step 3), the mud after the conditioning chemicals treatment is delivered in the process of diaphragm filter press, and pressure rises to 1.4MPa gradually from 0.6 MPa.
10. the sludge deep dehydrator according to claim 6 method of dewatering is characterized in that completing steps 1) to time of a whole set of operation of step 3) be 6 hours.
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CN104692611A (en) * | 2015-02-15 | 2015-06-10 | 南京中衡元环保设备有限公司 | Waste catalyst mud water dehydration treatment equipment and waste catalyst mud water dehydration treatment method |
CN105819666A (en) * | 2016-05-31 | 2016-08-03 | 杭州国泰环保科技股份有限公司 | Concentrated sludge dewatering system and concentrated sludge treatment method thereof |
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CN109052907A (en) * | 2018-10-17 | 2018-12-21 | 江苏瑞河环境工程研究院有限公司 | A kind of highly effective sludge Deep dehydration technique |
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CN114410704A (en) * | 2022-02-15 | 2022-04-29 | 上海云洛生物技术有限公司 | Method for biologically synthesizing vitronectin |
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CN110563290A (en) * | 2019-09-09 | 2019-12-13 | 湖南鑫恒环境科技有限公司 | in-situ deep dehydration treatment method for urban sludge plant |
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CN112010533A (en) * | 2020-10-20 | 2020-12-01 | 山东达源环保工程有限公司 | Sludge pretreatment system and process |
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