CN108793675B - The composition and method quenched for sludge - Google Patents
The composition and method quenched for sludge Download PDFInfo
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- CN108793675B CN108793675B CN201710300644.6A CN201710300644A CN108793675B CN 108793675 B CN108793675 B CN 108793675B CN 201710300644 A CN201710300644 A CN 201710300644A CN 108793675 B CN108793675 B CN 108793675B
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- sludge
- silicate
- acid solution
- suspension
- composition
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- 239000010802 sludge Substances 0.000 title claims abstract description 78
- 239000000203 mixture Substances 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title abstract description 12
- 239000000725 suspension Substances 0.000 claims abstract description 49
- 239000002253 acid Substances 0.000 claims abstract description 40
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims abstract description 23
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims abstract description 17
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 claims abstract description 15
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims abstract description 15
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 9
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 18
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- 239000007795 chemical reaction product Substances 0.000 claims description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 11
- 239000004111 Potassium silicate Substances 0.000 claims description 9
- 239000004115 Sodium Silicate Substances 0.000 claims description 9
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 claims description 9
- 235000019353 potassium silicate Nutrition 0.000 claims description 9
- 229910052913 potassium silicate Inorganic materials 0.000 claims description 9
- 235000019795 sodium metasilicate Nutrition 0.000 claims description 9
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 9
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 9
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 239000003513 alkali Substances 0.000 claims description 5
- 239000004411 aluminium Substances 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 5
- 239000000292 calcium oxide Substances 0.000 claims description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 4
- RQPZNWPYLFFXCP-UHFFFAOYSA-L barium dihydroxide Chemical compound [OH-].[OH-].[Ba+2] RQPZNWPYLFFXCP-UHFFFAOYSA-L 0.000 claims description 4
- 229910001863 barium hydroxide Inorganic materials 0.000 claims description 4
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 4
- 239000000920 calcium hydroxide Substances 0.000 claims description 4
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 4
- -1 iron ion Chemical class 0.000 claims description 4
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 4
- 239000000395 magnesium oxide Substances 0.000 claims description 4
- 235000012245 magnesium oxide Nutrition 0.000 claims description 4
- 229910001413 alkali metal ion Inorganic materials 0.000 claims description 3
- 229910001420 alkaline earth metal ion Inorganic materials 0.000 claims description 3
- 239000000347 magnesium hydroxide Substances 0.000 claims description 3
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 3
- 235000012254 magnesium hydroxide Nutrition 0.000 claims description 3
- WMGSQTMJHBYJMQ-UHFFFAOYSA-N aluminum;magnesium;silicate Chemical compound [Mg+2].[Al+3].[O-][Si]([O-])([O-])[O-] WMGSQTMJHBYJMQ-UHFFFAOYSA-N 0.000 claims description 2
- 235000012241 calcium silicate Nutrition 0.000 claims description 2
- 229910052681 coesite Inorganic materials 0.000 claims description 2
- 229910052593 corundum Inorganic materials 0.000 claims description 2
- 229910052906 cristobalite Inorganic materials 0.000 claims description 2
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 claims description 2
- 239000000391 magnesium silicate Substances 0.000 claims description 2
- 235000019792 magnesium silicate Nutrition 0.000 claims description 2
- 229910052919 magnesium silicate Inorganic materials 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 229920001296 polysiloxane Polymers 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 229910052682 stishovite Inorganic materials 0.000 claims description 2
- 229910052905 tridymite Inorganic materials 0.000 claims description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 2
- 230000007935 neutral effect Effects 0.000 claims 2
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 238000003860 storage Methods 0.000 abstract description 5
- 239000000243 solution Substances 0.000 description 41
- 238000003756 stirring Methods 0.000 description 11
- 239000010865 sewage Substances 0.000 description 9
- 239000012065 filter cake Substances 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000016615 flocculation Effects 0.000 description 6
- 238000005189 flocculation Methods 0.000 description 6
- 230000018044 dehydration Effects 0.000 description 5
- 238000006297 dehydration reaction Methods 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 239000004615 ingredient Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000011790 ferrous sulphate Substances 0.000 description 3
- 235000003891 ferrous sulphate Nutrition 0.000 description 3
- 239000000706 filtrate Substances 0.000 description 3
- 238000012913 prioritisation Methods 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 125000001931 aliphatic group Chemical group 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 125000002091 cationic group Chemical group 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000008394 flocculating agent Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000012875 nonionic emulsifier Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000001376 precipitating effect Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- YCPXWRQRBFJBPZ-UHFFFAOYSA-N 5-sulfosalicylic acid Chemical compound OC(=O)C1=CC(S(O)(=O)=O)=CC=C1O YCPXWRQRBFJBPZ-UHFFFAOYSA-N 0.000 description 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 229910002803 Si-O-Fe Inorganic materials 0.000 description 1
- 229910002800 Si–O–Al Inorganic materials 0.000 description 1
- 229910002802 Si–O–Fe Inorganic materials 0.000 description 1
- OBNDGIHQAIXEAO-UHFFFAOYSA-N [O].[Si] Chemical compound [O].[Si] OBNDGIHQAIXEAO-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 125000002252 acyl group Chemical group 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 150000008051 alkyl sulfates Chemical class 0.000 description 1
- 159000000013 aluminium salts Chemical class 0.000 description 1
- 229910000329 aluminium sulfate Inorganic materials 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- REDXJYDRNCIFBQ-UHFFFAOYSA-N aluminium(3+) Chemical compound [Al+3] REDXJYDRNCIFBQ-UHFFFAOYSA-N 0.000 description 1
- 239000012874 anionic emulsifier Substances 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- JXLHNMVSKXFWAO-UHFFFAOYSA-N azane;7-fluoro-2,1,3-benzoxadiazole-4-sulfonic acid Chemical compound N.OS(=O)(=O)C1=CC=C(F)C2=NON=C12 JXLHNMVSKXFWAO-UHFFFAOYSA-N 0.000 description 1
- 229940077388 benzenesulfonate Drugs 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229940043430 calcium compound Drugs 0.000 description 1
- 150000001674 calcium compounds Chemical class 0.000 description 1
- WOWHHFRSBJGXCM-UHFFFAOYSA-M cetyltrimethylammonium chloride Chemical compound [Cl-].CCCCCCCCCCCCCCCC[N+](C)(C)C WOWHHFRSBJGXCM-UHFFFAOYSA-M 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 239000007859 condensation product Substances 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- VPNOHCYAOXWMAR-UHFFFAOYSA-N docosan-1-amine Chemical compound CCCCCCCCCCCCCCCCCCCCCCN VPNOHCYAOXWMAR-UHFFFAOYSA-N 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 125000005702 oxyalkylene group Chemical group 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229950008882 polysorbate Drugs 0.000 description 1
- 229920000136 polysorbate Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 150000003138 primary alcohols Chemical class 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 150000003333 secondary alcohols Chemical class 0.000 description 1
- 239000010801 sewage sludge Substances 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical class O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 125000005624 silicic acid group Chemical group 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Treatment Of Sludge (AREA)
Abstract
The present invention relates to the composition quenched for sludge and its applications.The present composition contains: (A) alkalinity suspension, and the suspension contains polyaluminium sulfate, alkaline matter and emulsifier, and (B) acid solution, and the solution, which contains, forms product by bodied ferric sulfate and silicate reaction.The composition and application method quenched for sludge of the invention has the excellent and easy to operate advantage of storage stability.
Description
Technical field
The present invention relates to sludge caused by sewage treatment plant is further processed.Particularly, the present invention relates to one
Acidity of the kind comprising the alkaline suspension containing polyaluminium sulfate and the reaction product containing bodied ferric sulfate and silicate is molten
The composition of liquid, and its for carrying out the application of chemical conditioning in sludge is further processed.
Background technique
Modern society generates mass production sanitary wastewater and needs to handle.Most of sewage treatment plant uses activated sludge process
These waste water are handled, a large amount of sludge (also referred to as excess sludge) needs is thus generated and is further processed.It has developed
Numerous sludge disposal technologies, to wish to realize minimizing, the stabilisation, innoxious and recycling of sludge.
The moisture content of sludge from sewage treatment plant is high, and generally more than 95%.Correspondingly, the minimizing of sludge is generally led to
Dehydration is crossed to realize.Art methods generally comprise to sludge carry out it is quenched, be then dehydrated.Pass through quenched and machine at present
Tool dehydration, the moisture content of treated sludge is generally between 60-80%, and this dramatically reduces its volume and quality.
The ingredient of sludge first is that colloidal particle, there is strong affinity with water, to hinder sludge dewatering.Sludge is quenched
Purpose is to destroy the structure of the colloidal particle, its water affinity is reduced, to improve sludge dewatering efficiency.Sludge is quenched used
Additive include flocculant and flocculant aid.Flocculant includes organic flocculant and inorganic flocculating agent.Organic flocculant includes
Such as cationic polyacrylamide, inorganic flocculating agent include such as molysite and aluminium salt.Flocculant aid is including such as flyash and contains
Calcium compound, such as calcium oxide and calcium hydroxide powder.
Chinese patent application CN1962496A discloses a kind of method of deeply dehydrating sludge, including quenched and dehydration two
Raw material containing Fe is added in sludge, raw material containing Ca is added again after reacting several minutes, if then reacting wherein quenched include for step
Dry minute.It is combined by chemistry with machinery, the moisture content of final sludge is below 60%.
Quenched flocculant and flocculant aid used are often with the addition of powder, and resulting dust is to execute-in-place
There are certain infringements by personnel.In addition, often needing to be applied in combination a large amount of flocculation since amount of sludge to be processed is huge
Agent and flocculant aid.Flocculant is applied in combination by intermittently operated and when flocculation helps takes time and effort, and is combined in a manner of composition
The problem of poor storage stability can be encountered when helping using flocculant and flocculation.
Therefore, however it remains method of the exploitation for sludge quenched novel compositions and using can have excellent
Storage stability and easy to operate.
Summary of the invention
The present invention at least partly solves the above problem.The present invention provides a kind of composition quenched for sludge,
Contain: (A) alkalinity suspension, the suspension contain polyaluminium sulfate, selected from sodium hydroxide, potassium hydroxide, calcium oxide, hydrogen-oxygen
Change the alkaline matter and emulsifier of calcium, barium hydroxide, magnesia, magnesium hydroxide, sodium metasilicate or potassium silicate, and (B) acid solution,
The solution contains the reaction product of bodied ferric sulfate and silicate, and wherein silicate is selected from alkali and alkaline earth metal ions silicic acid
Salt.
The invention further relates to the applications that above-mentioned composition is used for Treatment of Sludge comprising: (i) make sludge and composition
(A) alkaline suspension mixing；(ii) mix sludge with (B) acid solution of composition；(iii) sludge dewatering is made.Step
Rapid (i) and step (ii) can be with reversed orders.
Specific embodiment
In order to avoid doubt, any feature of one aspect of the present invention any other aspect for use in the present invention.Word
Language "comprising" be intended to mean that " comprising " and " Consists of " or " by ... constitute ".In other words, cited step or option
Need not be exhaustion.It should be noted that given example is intended to illustrate the present invention and be not intended in the following description
Limit the invention to those examples itself.
In addition in embodiment, or when expressly stated otherwise, the amount or reaction condition, material of material are indicated in this specification
Physical property and/or purposes whole numerical value be understood to word " about " modify.Unless otherwise defined, with format
The numberical range that " from x to y " is indicated is understood to include x and y.When more to describe with format " from x to y " for specific feature
When a preferred range, it will be understood that, it is also expected for combining all ranges of different endpoints.
Unless otherwise indicated, otherwise percentage noted in the disclosure is weight percentage.
Composition
The quenched composition of sludge of the invention includes the alkaline suspension containing polyaluminium sulfate and contains polyaluminum sulfate
The acid solution of the reaction product of iron and silicate.
It has been found that the effect when handling the sludge of high-moisture percentage of the flocculant containing aluminium is preferable, but it is low aqueous handling
But become hindering factor when the sludge of rate.Within the scope of wider moisture percentage in sewage sludge, siliceous and iron flocculant can promote
Flocculation.Inventor wads a quilt with cotton it was unexpectedly observed that when existing simultaneously the flocculant containing aluminium and siliceous and iron flocculant in flocculation system
Solidifying effect significantly improves.It is not intended to stick to any theory, it has been recognised by the inventors that adjacent silicic acid molecule is dehydrated, being formed has silicon oxygen
The polymer of key.It is combined into the chelates such as Si-O-Fe, Si-O-Al with iron and aluminium ion in turn, so that being formed has flocculability
It can more preferably polymerizable medium form.Therefore, the alkaline suspension containing polyaluminium sulfate of the present composition with containing polymerizeing
When the acid solution of the reaction product of ferric sulfate and silicate meets in sludge, it will be hydrolyzed, be complexed, polymerize, precipitate
Reaction, generates a series of chelates.These chelates have higher positive charge, can generate absorption to electronegative sludge colloid
It is acted on charge neutrality, makes its de- steady, aggregation, precipitating, flocculation is enhanced, consequently facilitating subsequent dehydration.
In a prioritization scheme, alkaline suspension in composition containing polyaluminium sulfate with containing bodied ferric sulfate with
The weight ratio of the acid solution of the reaction product of silicate is 1:5-5:1, preferably 1:2-2:1, most preferably 1:1.It is excellent at another
In change scheme, the acid comprising the alkaline suspension containing polyaluminium sulfate Yu the reaction product containing bodied ferric sulfate and silicate
Property solution composition be arranged to kit, wherein the alkaline suspension containing polyaluminium sulfate with contain bodied ferric sulfate and silicon
The acid solution of the reaction product of hydrochlorate is placed in kit in spatially separated mode.In a prioritization scheme, contain
The acid solution of the alkaline suspension and the reaction product containing bodied ferric sulfate and silicate that have polyaluminium sulfate is stored in not
With in container chamber.In another prioritization scheme, the setting of container chamber allows to serially or simultaneously add containing polyaluminum sulfate
The alkaline suspension of aluminium and the acid solution of the reaction product containing bodied ferric sulfate and silicate.
Sludge texturing gagents box of the invention optionally includes operation instructions.
Alkaline suspension
The composition quenched for sludge of the invention contains alkaline suspension, the suspension contain polyaluminium sulfate,
Selected from sodium hydroxide, potassium hydroxide, calcium oxide, calcium hydroxide, barium hydroxide, magnesia, magnesium hydroxide, sodium metasilicate or potassium silicate
Alkaline matter and emulsifier.The pH value of the suspension is 7-14, preferably 9-13, more preferable 10-12.
Total weight wherein based on alkaline suspension, polyaluminium sulfate with 1-30%, preferably 5-25%, most preferably 10-20%'s
Amount exists.Based on the total weight of composition all components, aluminium content is with Al2O3It is calculated as >=1%, preferably 5-10%.
Alkaline matter is selected from sodium hydroxide, potassium hydroxide, calcium oxide, calcium hydroxide, barium hydroxide, magnesia, hydroxide
Magnesium, sodium metasilicate or potassium silicate.More preferably use sodium hydroxide or potassium hydroxide.Based on the total weight of alkaline suspension, basic species
Matter exists with 10-40%, preferably 10-30%, the amount of more preferable 10-15%.
Based on the total weight of alkaline suspension, emulsifier exists with 0.1-10%, the amount of preferably 5-10%.It is suspended for alkalinity
The emulsifier of liquid is selected from one of anionic, cationic and nonionic emulsifier or a variety of.Anionic emulsifier
It can be such as aliphatic sulfonate, aromatic sulphonate, alkyl sulfate, alkyl ether sulfate, C8-C22Mono-alkyl succinic acid salt and
Maleate, sulfosalicylic acetate and acyl isethinate.Nonionic emulsifier can be for example aliphatic (C8-C18) straight chain
Or condensation product, alkyl polyglycoside, sugared fatty acid amide and the long-chain tertiary amine oxide of branched-chain primary alcohol or secondary alcohol or phenols and oxyalkylene.Sun
Ionic emulsifying agent can be such as cetyltrimethylammonium chloride and chlorination behenyl ammonium.It is preferable to use rouge
Race's sulfonate.
Acid solution
The composition quenched for sludge of the invention contains acid solution, and the solution contains by bodied ferric sulfate and silicon
Reaction product made of hydrochlorate reaction, wherein silicate is selected from alkali and alkaline earth metal ions silicate.The pH value of the solution is
1-5, preferably 2-3.
Silicate is preferably selected from sodium metasilicate, potassium silicate, magnesium silicate, alumina silicate, aluminium-magnesium silicate or calcium silicates.More preferably use
Sodium metasilicate or potassium silicate.
The silicone content of the reaction product of bodied ferric sulfate and silicate is with SiO2It is calculated as 0.1-10%, preferably 1-5%；And iron
Ion concentration is 5-11%, preferably 6-9%.The reaction product of total weight based on acid solution, bodied ferric sulfate and silicate with
The amount for being changed to 1-10% exists.
Method
On the other hand, the invention further relates to the method that the present composition is used for Treatment of Sludge, the method packets
It includes step: (i) mixes sludge with (A) of composition alkaline suspension；(ii) make (B) acid solution of sludge and composition mixed
It closes；(iii) sludge dewatering is made.Step is (i) and step (ii) can be with reversed order.
Based on mud dry weight, alkaline suspension and acid solution respectively with 10-30%, preferably 15-25%, most preferably 18-20%'s
Amount is mixed with sludge.For example, by stirring, it is uniformly mixed sludge with alkaline suspension and acid solution.
Sludge dewatering is carried out for example, by filter press, such as plate and frame filter press.The moisture content of obtained sludge filter cake can be low
To about 30%.Sludge cellular water typically constitutes from the 40% of sludge weight, cannot directly be removed by mechanical dehydration, such as filters pressing.This
Invention obtains the sludge filter cake moisture content down to about 30% it is meant that partial sludge cellular water has been separated, this can give the credit to completely
In the use of the present composition.
Since kit of the present invention is by alkaline suspension and the spatially separated setting of acid solution, avoid due to
Resolution problem caused by potential reaction between each ingredient, to significantly improve the storage stability of kit.Meanwhile
Since the flocculant and flocculant aid quenched for sludge use in liquid form, the powder adjoint using powder reagent is avoided
Dustiness dye, and liquid be easier to metering and it is more fully mixed with sludge.Therefore, the examination quenched for sludge of the invention
The advantage that agent box and application method have storage stability excellent and easy to operate.
The present invention now is further illustrated by means of following non-limiting embodiment.
Embodiment
Alkaline suspension preparation
Alkaline suspension has consisting of, wherein each Ingredient Amount is in terms of weight %:
| Suspension 1 | Suspension 2 | Suspension 3 | Suspension 4 | |
| Polyaluminium sulfate 20wt% solution | 10 | 15 | 20 | 25 |
| Sodium hydroxide | 10 | - | 18 | 20 |
| Potassium hydroxide | - | 15 | 18 | 25 |
| Sodium alkyl benzene sulfonate | 0.6 | - | 1.5 | 2.5 |
| Polysorbate | - | 1.5 | 2.5 | 3.5 |
| Water | Surplus | Surplus | Surplus | Surplus |
* polyaluminium sulfate is purchased from Hubei development Chemical Co., Ltd..
Water, polyaluminum sulfate aluminum solutions and the above table amount shown of alkaline matter are added in mixer, at room temperature, slowly added
Enter emulsifier, stirs 4 hours.Obtain alkaline suspension.
Acid solution has consisting of, wherein each Ingredient Amount is in terms of weight %:
| Acid solution 1 | Acid solution 2 | Acid solution 3 | Acid solution 4 | |
| Polymeric ferrous sulphate solution | 60 | 65 | 70 | 75 |
| Sodium metasilicate 10wt% solution | 10 | - | 5 | 10 |
| Potassium silicate 10wt% solution | - | 10 | 5 | 5 |
| Dilute sulfuric acid (20wt%) | 10 | - | 5 | 10 |
| Water | Surplus | Surplus | Surplus | Surplus |
* polymeric ferrous sulphate solution, purchased from Hengyang City Shanghai with building materials chemical industry Co., Ltd.
At room temperature, sodium metasilicate and/or potassium silicate solution are added in mixer the above table amount shown, and sulfuric acid is then added
And polymeric ferrous sulphate solution, it stirs 4 hours, obtains acid solution.
After prepared alkaline suspension 1-4 and acid solution 1-4 stores 7 and 14 days at room temperature, not discovery point
Layer and precipitating.
Alkaline suspension 1 and acid solution 2 are stored in different vessels room with the weight ratio of 1:1, form kit 1.
Similarly, alkaline suspension 2 and acid solution 1 are stored in different vessels room with the weight ratio of 1:1, form kit 2；It will
Alkaline suspension 3 and acid solution 3 are stored in different vessels room with the weight ratio of 1:1, form kit 3.
The application of kit
Embodiment 1
In 60m3The quenched tank of sludge in inject the sludge 38m from sewage treatment plant3.The moisture content of the sludge is
97.6%.The alkaline suspension 1 of 330k kit 1 is added under stirring.After ten minutes, 350kg is added under stirring
The acid solution 2 of kit 1.It is 6.7 after after ten minutes, measuring the pH in quenched tank.Stop stirring, and will by feed pump
In sludge injection plate and frame filter press in quenched tank.Stop charging when the feed pressure of plate and frame filter press reaches 1.2MPa.It opens
Dynamic squeezing system, makes squeeze pressure 2.5MPa.Filtrate flows back into sewage treatment plant's processing.Stop squeezing after 80 minutes.It draws off
Sludge filter cake detects its moisture content, is 25.8%.
Embodiment 2
In 60m3The quenched tank of sludge in inject the sludge 35m from sewage treatment plant3.The moisture content of the sludge is
96.5%.The acid solution 1 of 220kg kit 2 is added under stirring.After ten minutes, 200kg is added under stirring
The alkaline suspension 2 of kit 2.It is 7.5 after after ten minutes, measuring the pH in quenched tank.Stop stirring, and passes through feed pump
It will be in the sludge injection plate and frame filter press in quenched tank.Stop charging when the feed pressure of plate and frame filter press reaches 1.2MPa.
Start squeezing system, makes squeeze pressure 2.5MPa.Filtrate flows back into sewage treatment plant's processing.Stop squeezing after sixty minutes.It unloads
Sludge filter cake out detects its moisture content, is 39.1%.
Embodiment 3
In 60m3The quenched tank of sludge in inject the sludge 48m from sewage treatment plant3.The moisture content of the sludge is
98.1%.170kg alkalinity suspension 3 and 170kg acid solution 3 are added by the container chamber of kit 3 simultaneously under stirring.
It is 7.6 after after ten minutes, measuring the pH in quenched tank.Stop stirring, and is injected the sludge in quenched tank by feed pump
In plate and frame filter press.Stop charging when the feed pressure of plate and frame filter press reaches 1.2MPa.Start squeezing system, presses squeezing
Power is 2.5MPa.Filtrate flows back into sewage treatment plant's processing.Stop squeezing after 65 minutes.Sludge filter cake is drawn off, it is aqueous to detect its
Rate is 48.5%.
Comparative example 1
Embodiment 1 is repeated, the difference is that being added without the acid solution 2 of kit 1.Detect the aqueous of sludge filter cake
Rate is 76.3%.
Comparative example 2
Embodiment 1 is repeated, the difference is that being added without the alkaline suspension 1 of kit 1.Detect the aqueous of sludge filter cake
Rate is 84.6%.
Claims (13)
1. a kind of composition quenched for sludge, contains: (A) alkalinity suspension, the suspension contain polyaluminium sulfate,
Selected from sodium hydroxide, potassium hydroxide, calcium oxide, calcium hydroxide, barium hydroxide, magnesia, magnesium hydroxide, sodium metasilicate or potassium silicate
Alkaline matter and emulsifier, and (B) acid solution, the solution contains the reaction product of bodied ferric sulfate and silicate,
Middle silicate is selected from alkali and alkaline earth metal ions silicate, and its neutral and alkali suspension and acid solution are stored in different vessels
In room.
2. composition described in claim 1, wherein the total weight based on composition all components, aluminium content is with Al2O3Be calculated as >=
1%。
3. composition described in claim 1, wherein the total weight based on alkaline suspension, polyaluminium sulfate is deposited with the amount of 1-30%
Exist in, alkaline matter with the amount of 10-40%, emulsifier exists with the amount of 0.1-10%.
4. composition described in claim 1, wherein the silicone content of the reaction product of bodied ferric sulfate and silicate is with SiO2It is calculated as
0.1-10%, and iron ion content is 5-11%.
5. composition described in claim 1, wherein the total weight based on acid solution, bodied ferric sulfate reacts production with silicate
Object exists with the amount of 60-90%.
6. composition described in claim 1, the pH value of neutral and alkali suspension is 9-13, and the pH of acid solution is 1-5.
7. composition described in claim 1, wherein silicate is selected from sodium metasilicate, potassium silicate, magnesium silicate, alumina silicate, aluminium-magnesium silicate
Or calcium silicates.
8. composition described in claim 1, wherein by (A) alkaline suspension and (B) acid solution with spatially separated side
Formula is placed in kit.
9. the described in any item compositions of claim 1-8 be used for Treatment of Sludge purposes comprising: (i) make sludge with combine
The alkaline suspension mixing of (A) of object；(ii) mix sludge with (B) acid solution of composition；(iii) sludge dewatering is made.
10. purposes according to claim 9, wherein step is (i) exchanged with the sequence of step (ii).
11. purposes according to claim 9, wherein being based on mud dry weight, alkaline suspension and acid solution are respectively with 10-
30% amount is mixed with sludge.
12. purposes according to claim 9, wherein being based on mud dry weight, alkaline suspension and acid solution are respectively with 15-
25% amount is mixed with sludge.
13. purposes according to claim 9, wherein being based on mud dry weight, alkaline suspension and acid solution are respectively with 18-
20% amount is mixed with sludge.
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