CN102503053A - Early-strength sludge modifier for landfill treatment and application thereof - Google Patents
Early-strength sludge modifier for landfill treatment and application thereof Download PDFInfo
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- CN102503053A CN102503053A CN2011103340321A CN201110334032A CN102503053A CN 102503053 A CN102503053 A CN 102503053A CN 2011103340321 A CN2011103340321 A CN 2011103340321A CN 201110334032 A CN201110334032 A CN 201110334032A CN 102503053 A CN102503053 A CN 102503053A
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- Prior art keywords
- sludge
- early
- strength
- agent
- activator
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Links
- 239000010802 sludge Substances 0.000 title claims abstract description 80
- 239000003607 modifier Substances 0.000 title abstract 9
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 68
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 34
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 32
- 239000002893 slag Substances 0.000 claims abstract description 31
- 239000012190 activator Substances 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000000203 mixture Substances 0.000 claims abstract description 12
- 239000002253 acid Substances 0.000 claims abstract description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 51
- 230000004048 modification Effects 0.000 claims description 45
- 238000012986 modification Methods 0.000 claims description 45
- 229920005646 polycarboxylate Polymers 0.000 claims description 31
- 239000004575 stone Substances 0.000 claims description 3
- 239000002994 raw material Substances 0.000 abstract description 13
- 238000000034 method Methods 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 8
- 238000002156 mixing Methods 0.000 abstract description 7
- 239000002699 waste material Substances 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 5
- 230000006835 compression Effects 0.000 abstract description 5
- 238000007906 compression Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 238000001035 drying Methods 0.000 abstract description 4
- 238000003825 pressing Methods 0.000 abstract description 3
- 239000000440 bentonite Substances 0.000 abstract description 2
- 229910000278 bentonite Inorganic materials 0.000 abstract description 2
- 238000003860 storage Methods 0.000 abstract description 2
- 230000000087 stabilizing effect Effects 0.000 abstract 1
- 238000003756 stirring Methods 0.000 abstract 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- 230000006872 improvement Effects 0.000 description 9
- 239000011575 calcium Substances 0.000 description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 239000010865 sewage Substances 0.000 description 5
- 239000002689 soil Substances 0.000 description 5
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 3
- 239000000920 calcium hydroxide Substances 0.000 description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 3
- 239000011777 magnesium Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910017604 nitric acid Inorganic materials 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 229910001424 calcium ion Inorganic materials 0.000 description 2
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- DNJIEGIFACGWOD-UHFFFAOYSA-N ethanethiol Chemical compound CCS DNJIEGIFACGWOD-UHFFFAOYSA-N 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 229910001629 magnesium chloride Inorganic materials 0.000 description 2
- 229910001425 magnesium ion Inorganic materials 0.000 description 2
- YIXJRHPUWRPCBB-UHFFFAOYSA-N magnesium nitrate Chemical compound [Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O YIXJRHPUWRPCBB-UHFFFAOYSA-N 0.000 description 2
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000010801 sewage sludge Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 229910021647 smectite Inorganic materials 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910021532 Calcite Inorganic materials 0.000 description 1
- 239000005997 Calcium carbide Substances 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- HPTYUNKZVDYXLP-UHFFFAOYSA-N aluminum;trihydroxy(trihydroxysilyloxy)silane;hydrate Chemical compound O.[Al].[Al].O[Si](O)(O)O[Si](O)(O)O HPTYUNKZVDYXLP-UHFFFAOYSA-N 0.000 description 1
- 230000031018 biological processes and functions Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 229910001919 chlorite Inorganic materials 0.000 description 1
- 229910052619 chlorite group Inorganic materials 0.000 description 1
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 239000010433 feldspar Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229910052621 halloysite Inorganic materials 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 229910052900 illite Inorganic materials 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 229910052622 kaolinite Inorganic materials 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- VGIBGUSAECPPNB-UHFFFAOYSA-L nonaaluminum;magnesium;tripotassium;1,3-dioxido-2,4,5-trioxa-1,3-disilabicyclo[1.1.1]pentane;iron(2+);oxygen(2-);fluoride;hydroxide Chemical compound [OH-].[O-2].[O-2].[O-2].[O-2].[O-2].[F-].[Mg+2].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[K+].[K+].[K+].[Fe+2].O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2 VGIBGUSAECPPNB-UHFFFAOYSA-L 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229960001866 silicon dioxide Drugs 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000002522 swelling effect Effects 0.000 description 1
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Landscapes
- Treatment Of Sludge (AREA)
Abstract
The invention discloses an early-strength sludge modifier for landfill treatment and application thereof. The early-strength sludge modifier comprises carbide slag, magnesia, bentonite, polycarboxylic-acid water reducing agent and activator. The application of the early-strength sludge modifier comprises the following steps: mixing water-containing sludge and the early-strength sludge modifier in a certain proportion, and stirring until the water-containing sludge and the early-strength sludge modifier are completely mixed; and pressing the mixture with a plate and frame filter press under the pressure of 25-35MPa. The early-strength sludge modifier disclosed by the invention is applicable to sludge with high water content, and has obvious curing effect and certain stabilizing effect; the carbide slag is used as one of the main raw materials of the modifier, thereby treating waste with waste; water is removed by pressing at normal temperature without consuming any outside heat source; the sludge modifier is prepared from the simple raw materials, is low at price, can eliminate odor while drying the sludge, and is beneficial to subsequent storage or landfill operation of sludge; and the compression strength is increased quickly, thereby being beneficial to the mechanical operation in the landfill process.
Description
Technical field
The present invention relates to sludge treatment and disposal field, relate in particular to a kind of agent of early-strength type sludge modification and application thereof that is applicable to landfill disposal.
Background technology
Along with the raising of expanding economy and quality of life, the public more and more pays close attention to environmental problem, to the also raising gradually of requirement of environmental quality.For the conserve water resource, improve the ecological environment, the WWT cause fast development of China, the sludge quantity that is produced in the sewage treatment process also increases day by day.Wastewater treatment method commonly used at present has physics method, chemical method, physico-chemical processes and biological process.Which kind of method of wastewater treatment all can produce throw out, PM for particulate matter or swimmer etc. more or less, and these materials are referred to as mud.According to statistics, every year is only just discharged dewatered sludge about 2 * 10 in the municipal sewage plant by China
5T is in wet mud pact (3.8～5.5) * 10
6T.According to relevant prediction, China's municipal effluent amount also had than leap ahead in next two decades, and the year two thousand twenty dewatered sludge quantity discharged will reach 3.0 * 107 t/a (calculating with water ratio 80%).Mud has become one of stern reality difficult problem of puzzlement sewage work.
Economic advantages such as the landfill disposal of solid waste relies on that it is constructed simply, construction investment province and running cost are low, many in the world countries have obtained widespread use, become the main flow disposal options that Developing country cities gives up admittedly.In the bigger developed country of area, also there are many countries to adopt the sanitary landfill method.According to China economic situation and the development in future trend of present stage, in considerable time from now on, landfill disposal remains China and handles one of most important method of municipal solid wastes.
The mud landfill is divided into independent landfill and mixes landfill.In Europe, dewatered sludge is many with municipal wastes mixing landfill, and in the U.S., the independent landfill of most employings.Mud can landfill depend on mud itself water ratio and soil mechanical properties.When the independent landfill of mud, the slip resistance of general requirement mud is not less than 80 ~ l00KN/m
2From economy and technology and since separately landfill to the having relatively high expectations of sludge quality and landfill yard, so, mix the main method that landfill will become China's sludge treatment in the several years.
The GB16889-2008 " household refuse landfill sites pollution control criterion " of State Environmental Protection Administration's issue came into effect on July 1st, 2008, had increased the moisture requirement of mud admission landfill disposal especially.So sludge drying is the first step of landfill disposal with solidifying, this also makes sludge drying, be solidificated in whole mud landfill disposal is playing the part of more and more important role.
In existing sludge solidifying agent or the properties-correcting agent patent, partially modified dose of addition is bigger, and partially modified dose takes time and grow (generally more than 10h), also has partly solidified dose only to be applicable to that water ratio is at the mud below 60%.Mentioned a kind of sludge modification agent among the Chinese patent CN102167489A, this sludge modification agent comprises modification dolomite and magnesium chloride, but the sludge treatment that this invention proposed needs dilution.Therefore; Present invention is directed at the mud of water ratio about 80 ~ 88%; Develop and be applicable to the sludge modification agent that increases the mud early anti pressured intension; Make the mud after the modification can reach the soil mechanical properties requirement of landfill, and treated mud is destitute of smell, reached stabilization through mechanism filter-pressing.
Summary of the invention
The objective of the invention is a kind of agent of early-strength type sludge modification and utilisation technology scheme thereof that is applicable to landfill disposal to the problems referred to above proposition; This scheme is applicable to the quick mummification of dewatered sludge, curing and the de-odorised properties-correcting agent that landfill yard is handled; Problems such as water ratio height, soil mechanical properties difference when solving the mud landfill; Make mud can reach the compression strength value of landfill yard fast, and can eliminate stench.
To achieve these goals, technical scheme of the present invention is:
A kind of early-strength type sludge modification agent that is applicable to landfill disposal; The agent of described early-strength type sludge modification comprises carbide slag, magnesia, wilkinite, polycarboxylate water-reducer, activator, and the ratio of weight and number of described stone electroslag, magnesia, wilkinite, polycarboxylate water-reducer, activator is:
Carbide slag 20 ~ 30
Magnesia 30 ~ 40
Wilkinite 15 ~ 25
Polycarboxylate water-reducer 10 ~ 20
Activator 0.5 ~ 10.
Further, the ratio of weight and number of described carbide slag, magnesia, wilkinite, polycarboxylate water-reducer, activator is:
Carbide slag 25
Magnesia 35
Wilkinite 20
Polycarboxylate water-reducer 15
Activator 5.
Further, described activator is one or more a mixture of strong acid.
Further, described activator be alkaline one or more.
Another object of the present invention realizes through following technical scheme:
A kind of application that is applicable to the early-strength type sludge modification agent of landfill disposal, described application may further comprise the steps:
(1) water-containing sludge and the agent of early-strength type sludge modification are mixed with certain proportion, be stirred to fully and mix;
(2) push under 25～35Mpa pressure with plate-and-frame filter press.
Further, the ratio of weight and number of described water-containing sludge and the agent of early-strength type sludge modification is 5 ~ 10:100.
The beneficial effect that compared with present technology the present invention produces is:
1, be applicable to the mud of high-moisture percentage, solidification effect is obvious, and certain stabilization effect is arranged;
2, adopt carbide slag as one of properties-correcting agent main raw material, realized the treatment of wastes with processes of wastes against one another;
3, the contained contained mg ion of calcium ion, magnesia of carbide slag itself is exactly the amendment and the modifying agent of soil; Polycarboxylate water-reducer also is a kind of soil-solidified-agent, acts synergistically between the various raw materials of the present invention, helps the landfill yard mechanical work;
4, normal temperature through pushing moisture removal, need not consume extraneous thermal source down;
5, sludge modification agent of the present invention adopts simple raw material to process, and is cheap, in sludge drying, can also eliminate stench, is beneficial to the operation of mud subsequent storage or landfill yard;
6, sludge water content is being reduced within the 2h below 55%, need not place for a long time, helps continuous operation;
7, ultimate compression strength increases comparatively fast, power operation when being beneficial to landfill.
Embodiment
Embodiment 1
A kind of early-strength type sludge modification agent that is applicable to landfill disposal; The agent of described early-strength type sludge modification comprises carbide slag, magnesia, wilkinite, polycarboxylate water-reducer, activator, and the ratio of weight and number of described stone electroslag, magnesia, wilkinite, polycarboxylate water-reducer, activator is:
Carbide slag 20 ~ 30
Magnesia 30 ~ 40
Wilkinite 15 ~ 25
Polycarboxylate water-reducer 10 ~ 20
Activator 0.5 ~ 10.
Early-strength type sludge modification of the present invention agent mainly is applicable to the mud of water ratio more than 80%.
Carbide slag is that the calcium carbide hydrolysis obtains behind the acetylene gas is the waste residue of staple with calcium hydroxide, and staple has CaO, CaS, Ca
3N
2, Ca
3P
2, Ca
2Si, Ca
3As
2And Ca (OH)
2Calcium hydroxide wherein has the good effect that has destroyed so-called in the mud " viscose glue phase region ".In order to obtain good effect, the carbide slag that obtains could add in the mud after at first need handling, otherwise just can not reach the ideal effect, and carbide slag described in the present embodiment is a powder, and particle diameter is 400 ~ 550 orders.
Magnesia has another name called causticity magnesia, magnesia, and its staple is a Natural manganese dioxide.Magnesia generally is raw material with the magnisite, forms at 800～850 ℃ of temperature lower calcinations, and be a kind of air-setting consolidating material of finely powdered, color has pure white, or greyish white, or closely faint yellow, and fresh material has scintillation glass gloss.Magnesia described in the present embodiment is a powdery.
Wilkinite (Bentonite) be a kind of clay rock, also claim the smectite clay rock, often contain a small amount of illite, kaolinite, halloysite, chlorite, zeolite, quartz, feldspar, calcite etc.; Be generally white, faint yellow; Be light gray, light green, pink, brown red, brick red, grey black etc. again because of iron-holder changes, have wax shape, earthy or oily luster.Loose as the soil that wilkinite has, what also have is fine and close hard; Main chemical compositions is silicon-dioxide, aluminium sesquioxide and water, also contains elements such as iron, magnesium, calcium, sodium, potassium.The chemical ingredients of smectite is: (Al
2, Mg
3) Si
4O
10(OH)
2NH2O is because it has special nature such as swelling property, cohesiveness, adsorptivity, catalytic, thixotropy, suspension and cationic exchange property, so be widely used in each industrial circle.Wilkinite described in the present embodiment is a powdery, and particle diameter is about 400 ~ 550 orders.
Polycarboxylate water-reducer is a kind of green additive with comb shaped molecular structure, and described polycarboxylate water-reducer mixes in the mud, can destroy the flucculation structure of mud granule, plays the effect that disperses mud granule.Open market product commonly used is the liquid dispersion phase, and solid content does not wait 10%, 20%, 40%, 50% usually.The solid content of the polycarboxylate water-reducer described in the present embodiment is 10%.
Activator in the present embodiment can be one or several a mixture of strong acid, also can be one or several mixture of alkaline.Described strong acid can be hydrochloric acid, sulfuric acid, nitric acid etc., and described highly basic can be sodium hydroxide, Pottasium Hydroxide etc.
During preparation, carbide slag, magnesia, wilkinite, polycarboxylate water-reducer, activator are got final product according to the portion rate mixing.
Under the condition that water exists; The calcium ion of sludge modification agent of the present invention, mg ion etc. can react with strong acid, highly basic and generate sal epsom, magnesium chloride, magnesium nitrate, calcium sulfate, calcium chloride, nitrocalcite, calcium hydroxide, Marinco H etc.; And produce a large amount of heat during reaction; Mud is played further need of stoving, help the subsequent disposal of mud.Simultaneously; Form crystal behind the calcium of sludge modification agent of the present invention, magnesium, the silicon plasma generation gelling reaction; Crystal habit is mainly needle-like, long column shape, and cross connection reticulates structure each other each other, thereby the mud after the use has very high physical strength.
Embodiment 2
Present embodiment is the improvement of on the basis of embodiment 1, carrying out; The part identical in the present embodiment with embodiment 1; Please understand with reference to disclosed content among the embodiment 1, embodiment 1 disclosed content should not be repeated in this description as the content of present embodiment here yet.
The ratio of weight and number of the carbide slag described in the sludge modification agent of the present invention, magnesia, wilkinite, polycarboxylate water-reducer, activator is:
Carbide slag 20
Magnesia 40
Wilkinite 15
Polycarboxylate water-reducer 20
Activator 0.5.
Embodiment 3
Present embodiment is the improvement of on the basis of embodiment 1, carrying out; The part identical in the present embodiment with embodiment 1; Please understand with reference to disclosed content among the embodiment 1, embodiment 1 disclosed content should not be repeated in this description as the content of present embodiment here yet.
The ratio of weight and number of the carbide slag described in the sludge modification agent of the present invention, magnesia, wilkinite, polycarboxylate water-reducer, activator is:
Carbide slag 30
Magnesia 30
Wilkinite 25
Polycarboxylate water-reducer 10
Activator 10.
Embodiment 4
Present embodiment is the improvement of on the basis of embodiment 1, carrying out; The part identical in the present embodiment with embodiment 1; Please understand with reference to disclosed content among the embodiment 1, embodiment 1 disclosed content should not be repeated in this description as the content of present embodiment here yet.
The ratio of weight and number of the carbide slag described in the sludge modification agent of the present invention, magnesia, wilkinite, polycarboxylate water-reducer, activator is:
Carbide slag 25
Magnesia 35
Wilkinite 20
Polycarboxylate water-reducer 15
Activator 5.
Embodiment 5
Present embodiment is the improvement of on the basis of embodiment 1, carrying out; The part identical in the present embodiment with embodiment 1; Please understand with reference to disclosed content among the embodiment 1, embodiment 1 disclosed content should not be repeated in this description as the content of present embodiment here yet.
Activator described in the sludge modification agent of the present invention is one or more a mixture of strong acid.
In the sludge modification agent of the present invention each raw materials in part by weight ratio can for:
Carbide slag 25
Magnesia 35
Wilkinite 20
Polycarboxylate water-reducer 15
Nitric acid 5.
In the sludge modification agent of the present invention each raw materials in part by weight ratio can for:
Carbide slag 25
Magnesia 35
Wilkinite 20
Polycarboxylate water-reducer 15
Sulfuric acid 5.
In the sludge modification agent of the present invention each raw materials in part by weight ratio can for:
Carbide slag 25
Magnesia 35
Wilkinite 20
Polycarboxylate water-reducer 15
Hydrochloric acid 5.
In the sludge modification agent of the present invention each raw materials in part by weight ratio can for:
Carbide slag 25
Magnesia 35
Wilkinite 20
Polycarboxylate water-reducer 15
Hydrochloric acid 1
Sulfuric acid 1
Nitric acid 3.
Embodiment 6
Present embodiment is the improvement of on the basis of embodiment 1, carrying out; The part identical in the present embodiment with embodiment 1; Please understand with reference to disclosed content among the embodiment 1, embodiment 1 disclosed content should not be repeated in this description as the content of present embodiment here yet.
Activator described in the sludge modification agent of the present invention is one or more a mixture of alkaline.
In the sludge modification agent of the present invention each raw materials in part by weight ratio can for:
Carbide slag 25
Magnesia 35
Wilkinite 20
Polycarboxylate water-reducer 15
Sodium hydroxide 5.
In the sludge modification agent of the present invention each raw materials in part by weight ratio can for:
Carbide slag 25
Magnesia 35
Wilkinite 20
Polycarboxylate water-reducer 15
Pottasium Hydroxide 5.
In the sludge modification agent of the present invention each raw materials in part by weight ratio can for:
Carbide slag 25
Magnesia 35
Wilkinite 20
Polycarboxylate water-reducer 15
Sodium hydroxide 1
Pottasium Hydroxide 4.
Embodiment 7
Present embodiment is the improvement of on the basis of embodiment 1, carrying out; The part identical in the present embodiment with embodiment 1; Please understand with reference to disclosed content among the embodiment 1, embodiment 1 disclosed content should not be repeated in this description as the content of present embodiment here yet.
A kind of embodiment 1 described application that is applicable to the early-strength type sludge modification agent of landfill disposal, described application may further comprise the steps:
(1) water-containing sludge and the agent of early-strength type sludge modification are mixed with certain proportion, be stirred to fully and mix; Described churning time is 10-15 minute, and described mixing process can be accomplished in kneader;
(2) push under 25～35Mpa pressure with plate-and-frame filter press.
Plate-and-frame filter press described in the present embodiment is commercially available general pressure filter, all can buy on the market.The plate-and-frame filter press that is adopted in the present embodiment is the 800 template formula pressure filter that scape Tianjin pressure filter factory is produced.
Embodiment 8
Present embodiment is the improvement of on the basis of embodiment 7, carrying out; The part identical in the present embodiment with embodiment 7; Please understand with reference to disclosed content among the embodiment 7, embodiment 7 disclosed contents should not be repeated in this description as the content of present embodiment here yet.
In the present embodiment, the ratio of weight and number of water-containing sludge described in the embodiment 7 and the agent of early-strength type sludge modification is 5 ~ 10:100.
Embodiment 9
Present embodiment is the improvement of on the basis of embodiment 8, carrying out; The part identical in the present embodiment with embodiment 8; Please understand with reference to disclosed content among the embodiment 8, embodiment 8 disclosed contents should not be repeated in this description as the content of present embodiment here yet.
In the present embodiment, the ratio of weight and number of water-containing sludge described in the embodiment 7 and the agent of early-strength type sludge modification is 5:100.
Get water ratio and be 86% the Sewage Plant dewatered sludge 1000kg of Beijing; Add 50kg properties-correcting agent and in kneader thorough mixing, after the plate-and-frame filter press extruding, moisture percentage in sewage sludge reduces to 51%; Ultimate compression strength becomes 75Kpa, satisfies the requirement of mud landfill fully.Mixing machine in the present embodiment is the NH-4000 type kneader that the mechanical Manufacturing Co., Ltd of precious vacuum kneading of a specified duration produces.
Embodiment 10
Present embodiment is the improvement of on the basis of embodiment 8, carrying out; The part identical in the present embodiment with embodiment 8; Please understand with reference to disclosed content among the embodiment 8, embodiment 8 disclosed contents should not be repeated in this description as the content of present embodiment here yet.
In the present embodiment, the ratio of weight and number of water-containing sludge described in the embodiment 7 and the agent of early-strength type sludge modification is 10:100.
Get water ratio and be 80% the Sewage Plant dewatered sludge 500kg of Beijing; Add 50kg properties-correcting agent and in kneader thorough mixing, after the plate-and-frame filter press extruding, moisture percentage in sewage sludge reduces to 54.3%; Ultimate compression strength becomes 71Kpa, satisfies the requirement of mud landfill fully.
Claims (6)
1. early-strength type sludge modification agent that is applicable to landfill disposal; It is characterized in that: the agent of described early-strength type sludge modification comprises carbide slag, magnesia, wilkinite, polycarboxylate water-reducer, activator, and the ratio of weight and number of described stone electroslag, magnesia, wilkinite, polycarboxylate water-reducer, activator is:
Carbide slag 20 ~ 30
Magnesia 30 ~ 40
Wilkinite 15 ~ 25
Polycarboxylate water-reducer 10 ~ 20
Activator 0.5 ~ 10.
2. sludge modification agent according to claim 1 is characterized in that the ratio of weight and number of described carbide slag, magnesia, wilkinite, polycarboxylate water-reducer, activator is:
Carbide slag 25
Magnesia 35
Wilkinite 20
Polycarboxylate water-reducer 15
Activator 5.
3. sludge modification agent according to claim 1 and 2 is characterized in that described activator is one or more a mixture of strong acid.
4. sludge modification agent according to claim 1 and 2, it is characterized in that described activator be alkaline one or more.
5. the application of the described early-strength type sludge modification of claim 1 agent is characterized in that described application may further comprise the steps:
Water-containing sludge and the agent of early-strength type sludge modification are mixed with certain proportion, be stirred to fully and mix;
Push under 25～35Mpa pressure with plate-and-frame filter press.
6. the application of early-strength type sludge modification according to claim 5 agent is characterized in that the ratio of weight and number of described water-containing sludge and the agent of early-strength type sludge modification is 5 ~ 10:100.
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| CN103214155A (en) * | 2013-04-19 | 2013-07-24 | 湖州师范学院 | Sludge activator |
| CN105198367A (en) * | 2015-08-17 | 2015-12-30 | 广州市建筑科学研究院有限公司 | Curing agent capable of rapidly curing sludge at room temperature and use method thereof |
| CN112794591A (en) * | 2021-03-23 | 2021-05-14 | 深圳瑞新达新能源科技有限公司 | Composite sludge curing agent |
| CN112875832A (en) * | 2021-03-17 | 2021-06-01 | 辽宁工程技术大学 | Preparation method of alkaline slow-release material |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103214155A (en) * | 2013-04-19 | 2013-07-24 | 湖州师范学院 | Sludge activator |
| CN103214155B (en) * | 2013-04-19 | 2014-05-28 | 湖州师范学院 | Sludge activator |
| CN105198367A (en) * | 2015-08-17 | 2015-12-30 | 广州市建筑科学研究院有限公司 | Curing agent capable of rapidly curing sludge at room temperature and use method thereof |
| CN112875832A (en) * | 2021-03-17 | 2021-06-01 | 辽宁工程技术大学 | Preparation method of alkaline slow-release material |
| CN112875832B (en) * | 2021-03-17 | 2022-08-23 | 辽宁工程技术大学 | Preparation method of alkaline slow-release material |
| CN112794591A (en) * | 2021-03-23 | 2021-05-14 | 深圳瑞新达新能源科技有限公司 | Composite sludge curing agent |
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| CN102503053B (en) | 2013-08-28 |
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