CN109179935A - A kind of sludge curing agent and its preparation method and application - Google Patents
A kind of sludge curing agent and its preparation method and application Download PDFInfo
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- CN109179935A CN109179935A CN201811345254.1A CN201811345254A CN109179935A CN 109179935 A CN109179935 A CN 109179935A CN 201811345254 A CN201811345254 A CN 201811345254A CN 109179935 A CN109179935 A CN 109179935A
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- sludge curing
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- 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
- C02F11/008—Sludge treatment by fixation or solidification
-
- 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
- C02F11/004—Sludge detoxification
-
- 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
- C02F11/06—Treatment of sludge; Devices therefor by oxidation
-
- 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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/02—Odour removal or prevention of malodour
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
Abstract
The present invention provides a kind of sludge curing agent and its preparation method and application, and the sludge curing agent is by following raw material by being made according to parts by weight: 45-50 parts of iron calcium sieve and silica-sesquioxide, 15-20 parts of magnesia, 8-10 parts of bodied ferric sulfate, 7-12 parts of alumina silicate, 8-15 parts of perlite, 0.8-1.5 parts of cation chelate, 0.5-1 parts of dodecyl sodium sulfate, 0.5-1 parts of calcium hypochlorite, 0.4-0.6 parts of hydroxypropyl methyl cellulose, 0.2-0.8 parts of modified starch, 0.1-0.5 parts of dimethylaniline.Sludge curing agent of the invention is added in mud, mud moisture content can be made low, solidification effect is good, and required curing time is short, high-efficient.
Description
Technical field
The present invention relates to sludge treatment field, specifically a kind of sludge curing agent and its preparation method and application.
Background technique
Dirty mud is a kind of sticky mass generated in sewage disposal process, it based on aerobic, anaerobe,
It is also mixed into the silt having in raw sewage, fiber, organic matter, the metal, germ, worm of plant and animal residues and absorption on it simultaneously
The mixture of the Various Complexes such as ovum, colloid.For the rivers and lakes in large size city sewage treatment plant and city, due to
There is a large amount of industrial wastewater to be discharged into system, cause in Sewage mud containing a large amount of microorganism, pathogen, heavy metal and
Organic pollutant, water content, if mishandling, will cause serious secondary pollution generally 80% or more.
The mode of existing major part sludge solidification is all based on cement and quick lime, and the effect of cement is to increase mud
Gumminess, so that mud is bonded together, and make mud hardening, quick lime is mainly used for absorbing water, such as China
CN201210012249.5 patent discloses a kind of sludge curing agent and the sullage solidifying method using sludge curing agent, is related to
Sludge treatment field, the sludge curing agent are made by the following method: first choice will include expansible graphite, cement, flyash, charcoal
Seven kinds of black, silicon powder, china clay and quick lime composition mixing, the invention is long there is also curing time, cannot remove the special evil of mud
Foul smell taste.
A kind of dirty sludge curing agent of Chinese CN201010594732.X patent and the method for solidifying dirty mud.The dirty silt
Mud curing agent contains portland cement and activated magnesia.The dirt sludge curing agent is for the dirty silt of municipal sewage plant dehydration
The processing of mud and river dirt mud.The curing agent curing time is short, easy to operate, degradation and curing heavy metal effect are obvious.?
When handling dirty mud and bed mud, the curing agent can in 4 hours rapid curing dirt mud, reach within 5 days landfill and require, reduce
60% to 90% or more total metal contents in soil in city dirt mud and river bottom mud, particularly suitable for large size city sewage treatment plant
With the curing process of city river dirt mud.But the invention is long there is also curing time, solidifies problem at high cost.
The processing method of dirt mud is mainly agricultural at present, burn and landfill, also high amount of dirty mud do not pass through
Any processing arbitrarily abandons.Due to the water content height of dirty mud, the high complicated component of pollutant load, existing processing mode is general
There are environmental pollution, processing cost is excessively high, processing overlong time, while also easily causing landfill yard Geological Hazard etc.
The problem of.Therefore, sewage plant and lake dirt mud how are rationally disposed, the outlet for solving city dirt mud has become very tightly
Urgent task.
Summary of the invention
In view of the above shortcomings of the prior art, the present invention provides a kind of sludge curing agent and its preparation method and application, should
Method solidification effect is good, and required curing time is short, high-efficient, can effectively remove the foul odour of mud.
Technical solution provided by the invention: a kind of sludge curing agent is made of the raw material that following parts by weight form:
The ferro-silico aluminium calcium oxide is that one or more of volcano lime-ash, thin cinder, slag powders or gangue are mixed
Close object；
The cation chelate is formed by chelating agent and metal ion-chelant, and chelating agent selects ethylenediamine tetra-acetic acid
(EDTA), aminotriacetic acid (NTA), one of tartaric acid (TA), bicine N- (DEG) or multiple combinations, metal
Ion selects magnesium ion, calcium ion or iron ion.
Further, the sludge curing agent is made of the raw material that following parts by weight form:
The cation chelate is that tartaric acid (TA) is chelated with iron ion.
A kind of preparation method of sludge curing agent includes the following steps: (1) by each raw material by following parts by weight: iron calcium
45-50 parts of sieve and silica-sesquioxide, 15-20 parts of magnesia, 8-10 parts of bodied ferric sulfate, 7-12 parts of alumina silicate, 8-15 parts of perlite, sun
0.8-1.5 parts of ion chelate complex, 0.5-1 parts of dodecyl sodium sulfate, 0.5-1 parts of calcium hypochlorite, hydroxypropyl methyl cellulose
0.4-0.6 parts, 0.2-0.8 parts of modified starch, 0.1-0.5 parts of dimethylaniline choose raw material, spare；(2) above-mentioned raw materials are existed
Stirring is sufficiently mixed in blender.
A kind of application of sludge curing agent, according to curing agent and mud mass ratio for 4%~40%:1 additive ratio by institute
It states curing agent to be added in mud, then after being sufficiently mixed, natural drying, which solidifies 0.5-1h, be can be used.
Sludge curing agent of the invention in use, can according to the moisture content and intensity of the mud after required solidification,
The amount of appropriate adjustment its composition and ratio and addition.
Beneficial effects of the present invention:
(1) present invention can have using the metal oxides such as iron calcium sieve and silica-sesquioxide and magnesia as curing agent primary raw material
Effect captures the moisture content in mud by each kinds of oxidation reaction, reduces the moisture content of mud, and it is short to realize required curing time, imitates
The high functional characteristics of rate；
(2) for the present invention using bodied ferric sulfate as one of curing agent primary raw material, bodied ferric sulfate is a kind of superior performance
Inorganic polymer coagulant, to it is micro- pollution, contain algae, low-temperature and low turbidity purificating raw water obvious processing effect, to high turbidity raw sewage
Clean-up effect it is further preferred that, have it is nontoxic, it is harmless, securely and reliably, turbidity removal, decoloration, dehydration, degerming, deodorization, except algae, go in water removal
COD, BOD and heavy metal ion and other effects.
(3) present invention removes mud moisture content, while moisture content by physical absorption using the perlite with porous structure
It can also slowly protrude into hole to chemically react with some of which parasitism substance, further absorb moisture content, such structure shape
At a physics water suction and chemistry two kinds of simultaneous modes of water suction.In physics water absorption course, moisture content in mud along
Into its inner pore in parasitic particle, parasitic particle reacts perlite surface distributed expansion with water, by moisture content knot completely
It closes, reaches cured effect；
(4) present invention using alumina silicate as one of curing agent primary raw material, alumina silicate during cured, as
Cementitious material filler can be improved the hardness, wearability, weatherability, storage stability of mud, have the dirty mud after solidifying
There is stronger early stage pressure-proof and snap-resistent intensity, is conducive to mechanically actuated when landfill.
(5) present invention uses hydroxypropyl methyl cellulose and modified starch as curing agent primary raw material, can be effective
It adsorbs heavy metal, destroy microorganism structure, hydrolysis organic pollutant, stench can also be eliminated while reducing pollution, be conducive to dirt
The application of mud subsequent storage or landfill and cured product；
(6) present invention can carry out sterilizing to mud, kill in mud using calcium hypochlorite as strong oxidizer
A large amount of microorganisms prevent microorganism from further fermenting and generate foul gas, also play the effect of deodorant.
(7) dimethylaniline can accelerate curing reaction as a kind of curing accelerator, and it is residual can preferably to enhance dirty mud
Structural, raising early stage pressure-proof and snap-resistent intensity and the stability of slag.
(8) cation chelate is for removing toxic heavy metal ion, dirt sludge curing agent of the present invention and its answers
With being compared with the traditional method, raw material is simple and easy to get, and cheap solidification process is simple, curing time is short, high-efficient, transporter
Just, processing cost is low, and the dirty mud after solidification not will cause secondary pollution, and the conventional curing time is 8-24h, using the application's
Subsequent processing can be quickly carried out after sludge curing agent curing sludge, save activity time.
Detailed description of the invention
Fig. 1 be using after sludge curing agent of the invention, the moisture content of mud with curing time change curve；
In figure: abscissa is curing time, and unit: min, ordinate are moisture content, unit: %.
Specific embodiment
The present invention is described further combined with specific embodiments below.
Embodiment 1
A kind of preparation method of sludge curing agent includes the following steps: (1) by each raw material by following parts by weight: duff
45 parts of slag, 20 parts of magnesia, 8 parts of bodied ferric sulfate, 7 parts of alumina silicate, 15 parts of perlite, 1.5 parts of cation chelate, dodecane
1 part of base sodium sulfonate, 1 part of calcium hypochlorite, 0.6 part of hydroxypropyl methyl cellulose, 0.8 part of modified starch, 0.1 part of dimethylaniline,
Raw material is chosen, it is spare；(2) above-mentioned raw materials are sufficiently mixed to stirring in blender.
The cation chelate is to be formed by ethylenediamine tetra-acetic acid (EDTA) with magnesium ion sequestration,
The curing agent is added in mud according to the additive ratio that curing agent and mud mass ratio are 4%:1, then into
After row is sufficiently mixed, natural drying, which solidifies 1h, be can be used.
Embodiment 2
A kind of preparation method of sludge curing agent includes the following steps: (1) by each raw material by following parts by weight: volcano
48 parts of lime-ash, 18 parts of magnesia, 9 parts of bodied ferric sulfate, 10 parts of alumina silicate, 11 parts of perlite, 1 part of cation chelate, 12
0.7 part of sodium alkyl sulfonate, 0.8 part of calcium hypochlorite, 0.5 part of hydroxypropyl methyl cellulose, 0.7 part of modified starch, dimethylaniline
0.3 part, raw material is chosen, it is spare；(2) above-mentioned raw materials are sufficiently mixed to stirring in blender.
The cation chelate is that tartaric acid (TA) is chelated with iron ion.
The curing agent is added in mud according to the additive ratio that curing agent and mud mass ratio are 5%:1, then into
After row is sufficiently mixed, natural drying, which solidifies 0.9h, be can be used.
Embodiment 3
A kind of preparation method of sludge curing agent includes the following steps: (1) by each raw material by following parts by weight: bastard coal
46 parts of stone, 19 parts of magnesia, 10 parts of bodied ferric sulfate, 9 parts of alumina silicate, 11 parts of perlite, 1.2 parts of cation chelate, 12
0.9 part of sodium alkyl sulfonate, 1 part of calcium hypochlorite, 0.6 part of hydroxypropyl methyl cellulose, 0.8 part of modified starch, dimethylaniline 0.5
Part, raw material is chosen, it is spare；(2) above-mentioned raw materials are sufficiently mixed to stirring in blender.
The cation chelate is to be chelated by aminotriacetic acid (NTA) with calcium ion.
The curing agent is added in mud according to the additive ratio that curing agent and mud mass ratio are 8%:1, then into
After row is sufficiently mixed, natural drying, which solidifies 0.8h, be can be used.
Embodiment 4
A kind of preparation method of sludge curing agent includes the following steps: (1) by each raw material by following parts by weight: slag
47 parts of powder, 18 parts of magnesia, 9 parts of bodied ferric sulfate, 10 parts of alumina silicate, 13 parts of perlite, 0.8 part of cation chelate, 12
0.6 part of sodium alkyl sulfonate, 0.6 part of calcium hypochlorite, 0.4 part of hydroxypropyl methyl cellulose, 0.3 part of modified starch, dimethylaniline
0.3 part, raw material is chosen, it is spare；(2) above-mentioned raw materials are sufficiently mixed to stirring in blender.
The cation chelate is to be formed by bicine N- (DEG) with magnesium ion sequestration.
The curing agent is added in mud according to the additive ratio that curing agent and mud mass ratio are 15%:1, then into
After row is sufficiently mixed, natural drying, which solidifies 0.7h, be can be used.
Embodiment 5
A kind of preparation method of sludge curing agent includes the following steps: (1) by each raw material by following parts by weight: bastard coal
25 parts of stone, 24 parts of volcano lime-ash, 17 parts of magnesia, 10 parts of bodied ferric sulfate, 11 parts of alumina silicate, 9 parts of perlite, cation chelating
0.8 part of object, 0.7 part of dodecyl sodium sulfate, 0.7 part of calcium hypochlorite, 0.6 part of hydroxypropyl methyl cellulose, modified starch 0.7
Part, 0.5 part of dimethylaniline choose raw material, spare；(2) above-mentioned raw materials are sufficiently mixed to stirring in blender.
The cation chelate is to be chelated by ethylenediamine tetra-acetic acid (EDTA) with iron ion,
The curing agent is added in mud according to the additive ratio that curing agent and mud mass ratio are 25%:1, then into
After row is sufficiently mixed, natural drying, which solidifies 0.6h, be can be used.
Embodiment 6
A kind of preparation method of sludge curing agent includes the following steps: (1) by each raw material by following parts by weight: slag
20 parts of powder, 30 parts of gangue, 15 parts of magnesia, 9 parts of bodied ferric sulfate, 12 parts of alumina silicate, 10 parts of perlite, cation chelate
1 part, 0.9 part of dodecyl sodium sulfate, 0.8 part of calcium hypochlorite, 0.5 part of hydroxypropyl methyl cellulose, 0.6 part of modified starch, two
0.2 part of methylaniline, raw material is chosen, it is spare；(2) above-mentioned raw materials are sufficiently mixed to stirring in blender.
The cation chelate selects aminotriacetic acid (NTA) to chelate with iron ion.
The curing agent is added in mud according to the additive ratio that curing agent and mud mass ratio are 35%:1, then into
After row is sufficiently mixed, natural drying, which solidifies 0.5h, be can be used.
Following table be above-described embodiment 1-6 is carried out to solidifying relevant test result detection data, while with it is existing certain
Sludge curing agent based on cement and quick lime is as a comparison case.
1 sludge curing agent testing result of table
Find out from upper table experimental result, curing time needed for existing tradition sludge curing agent is longer, and mud after solidification
The degree that reduces of moisture content it is less compared to of the invention, compression strength is also more almost.The present invention has curing time short,
High-efficient feature, and the foul odour of the mud after solidifying is more a little less.
Dependence test has also been made for the time of sludge solidification in the present invention, in the identical situation of other conditions, determines not
With the variation of the moisture content of mud after curing time, as shown in Figure 1, itself the result shows that, when being just initially added into curing agent, mud contains
Water rate is remarkably decreased, and to after sixty minutes, fall off rate is very slow, and it is 30-60min that the present invention, which has selected preferably curing time,
Under this condition, cured effect has been had reached.
The foregoing is merely the detailed descriptions of specific embodiments of the present invention, do not limit the present invention with this, all at this
Made any modifications, equivalent replacements, and improvements etc. in the mentality of designing of invention, should be included in protection scope of the present invention it
It is interior.
Claims (4)
1. a kind of sludge curing agent, it is characterised in that: be made of the raw material that following parts by weight form:
The ferro-silico aluminium calcium oxide is one or more of volcano lime-ash, thin cinder, slag powders or gangue mixture；
The cation chelate is formed by chelating agent and metal ion-chelant, and chelating agent selects ethylenediamine tetra-acetic acid
(EDTA), aminotriacetic acid (NTA), one of tartaric acid (TA), bicine N- (DEG) or multiple combinations, metal
Ion selects magnesium ion, calcium ion or iron ion.
2. sludge curing agent according to claim 1, it is characterised in that: be made of the raw material that following parts by weight form:
The cation chelate is that tartaric acid (TA) is chelated with iron ion.
3. a kind of preparation method of sludge curing agent as described in claim 1, include the following steps: (1) by each raw material press with
Lower parts by weight: 45-50 parts of iron calcium sieve and silica-sesquioxide, 15-20 parts of magnesia, 8-10 parts of bodied ferric sulfate, 7-12 parts of alumina silicate,
8-15 parts of perlite, 0.8-1.5 parts of cation chelate, 0.5-1 parts of dodecyl sodium sulfate, 0.5-1 parts of calcium hypochlorite, hydroxypropyl
0.4-0.6 parts of ylmethyl cellulose, 0.2-0.8 parts of modified starch, 0.1-0.5 parts of dimethylaniline choose raw material, spare；(2)
Above-mentioned raw materials are sufficiently mixed to stirring in blender.
4. a kind of application method of sludge curing agent as described in claim 1, includes the following steps: according to curing agent and mud
The curing agent is added in mud the additive ratio that mass ratio is 4%~40%:1, then after being sufficiently mixed, dries in the air naturally
Shining solidification 0.5-1h can be used.
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| Publication number | Publication date |
|---|---|
| CN109179935B (en) | 2021-11-23 |
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