CN109970314A - A kind of compound drying agent and its preparation and application - Google Patents
A kind of compound drying agent and its preparation and application Download PDFInfo
- Publication number
- CN109970314A CN109970314A CN201811592117.8A CN201811592117A CN109970314A CN 109970314 A CN109970314 A CN 109970314A CN 201811592117 A CN201811592117 A CN 201811592117A CN 109970314 A CN109970314 A CN 109970314A
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- Prior art keywords
- drying agent
- sludge
- compound drying
- mixture
- lime
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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
- C02F11/12—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
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a kind of compound drying agents, are related to environmental protection treatment technical field.Compound drying agent includes: cement 25-35%, lime and mixture of fly ash 8-12%, gypsum and clay mixture 8-12%, industrial residue 5-10%, sodium carbonate 3-7%, polyacrylamide 30-45% by weight percentage.The present invention provides a kind of mud at low cost, that solidification effect is good compound drying agent, its solidification that can be directly used for high-moisture mud, while curing time is short, the intensity of clod is high after solidification, after solidification the heavy metal precipitation of free state in sludge can encapsulate, achieve the effect that steady in a long-term.
Description
Technical field
The invention belongs to environmental protection treatment technical fields, more particularly to a kind of compound drying agent and its preparation and application.
Background technique
A large amount of mud is generated during the training of channel, lake dredging up, to handle these mud, generally requires a large amount of people
Power and resource, in the prior art, there are mainly two types of the methods for handling these mud: first is that finding dedicated landfill place, will become silted up
Mud is stacked, filling of then blowing sand again, however the drawbacks of such method is: being needed a large amount of special landfill place, while being expended people
Power, transportation cost are high；Another processing method is then that compound drying agent solidification is added in mud；Existing compound drying agent is deposited
Long in curing time, the intensity of clod is low after solidification and Heavy Metals in Sludge is also easy to produce free problem.
In addition, the prior art emphasizes the mechanical strength such as unconfined compressive strength that compound drying agent is added to mud or soil
It is promoted, however, the faintly acid of mud can cause certain harm to environment, is not aroused enough attention.
Summary of the invention
Technical purpose of the invention is to provide a kind of cost for technical deficiency present in reality sludge treatment
The compound drying agent of mud low, that solidification effect is good, can be directly used for the solidification of high-moisture mud, while curing time is short,
The intensity of clod is high after solidification, and after solidification the heavy metal precipitation of free state in sludge can encapsulate, reach effect steady in a long-term
Fruit.
In order to solve the above technical problems, the present invention is achieved by the following technical solutions:
The present invention is a kind of compound drying agent, by weight percentage includes: that cement 25-35%, lime and flyash are mixed
Close object 8-12%, gypsum and clay mixture 8-12%, industrial residue 5-10%, sodium carbonate 3-7%, polyacrylamide 30-
45%.
Further, the compound drying agent includes: cement 30%, lime and mixture of fly ash by weight percentage
10%, gypsum and clay mixture 10%, industrial residue 8%, sodium carbonate 5%, polyacrylamide 37%.
Further, the lime and mixture of fly ash include lime 0-100%, flyash 0- by weight percentage
100%.
Further, the gypsum and clay mixture include gypsum 0-100%, clay 0- by weight percentage
100%.
A kind of preparation method of compound drying agent, includes the following steps:
Step 1 takes industrial residue to be milled；
Step 2, the industrial residue that will be milled add suitable with lime and mixture of fly ash, sodium carbonate and gypsum and clay mixture
Amount water is uniformly mixed and mud cake block is made；
Step 3 will be milled after the drying drying of gained mud cake block；
Milling mud cake obtained by step 3 is uniformly mixed to obtain the final product by step 4 with cement and polyacrylamide.
A kind of application of compound drying agent in Treatment of Sludge.
The invention discloses the first application of the compound drying agent in Treatment of Sludge, specifically include:
S1, by the sludge condensation of processing to be solidified or be diluted to water content be 75-85%；
S2, the sludge after concentration is uniformly mixed with compound drying agent by the weight ratio of 3-9:1；
S3, the plastic film standing for protecting gas insulation effect is played in mix surface covering；
S4,2-6 hours are stood, opens film on surface and suitable quantity of water is spread using spray head.
The invention also discloses application of second of compound drying agent in Treatment of Sludge, specifically include:
S01, to water content to be processed greater than 90% sludge in addition filler be uniformly mixed adjust water content to
75-85% is aerated 3-5 hours；
S02, compound drying agent is added into sludge and is mixed evenly.
Further, the filler is selected in lime and mixture of fly ash, gypsum and clay mixture, industrial residue
Any one or more.
Further, the compound drying agent accounts for the 9-13% of sludge and packing quality sum.
Flyash includes many compact grains, and partial size is very small, it may occur that hydration, except this is there is also porous
Structural material.Flyash includes some metal oxides and can react with water, therefore, can absorb water.Flyash can be with
, by there is also porous structures in the inner, it can be used as more short grained second level in hole in filling expanded graphite well and post
Raw carrier.There are physics water suctions and chemistry to absorb water two kinds when flyash absorbs the moisture content of moisture content in the hole of expanded graphite
Mode.Due to flyash be for colonizing in expanded graphite, dosage should not be more, should be less than expanded graphite use
Amount.
Quick lime is mainly used for absorbing water, and generates amount of heat, is in mud in one higher environment of temperature, temperature
The higher chemical reaction velocity and effect for being conducive to improve between particle is spent, and the evaporation of moisture content can also be accelerated.It is also used
In the acidity for adjusting mud, make environment in alkalinity.It, can be with when quicklime particles are present in the hole of expanded graphite
The moisture content to be come by expanded graphite diffusion into the surface is absorbed, and reacts generation heat, the moisture content around thermal energy evaporation, this mistake
Journey can speed up diffusion velocity of the moisture content in the hole of expanded graphite, is conducive to other absorbent materials and absorbs moisture content.
The effect of cement is that the gumminess of increase mud makes mud be bonded together, and makes mud hardening, therefore it is being answered
Ratio can be bigger in conjunction drying agent: after ordinary portland cement and native mix, the water in mineral and the soil body contained by cement
Strong hydrolysis and hydration reaction occurs, solution can decomposite calcium hydroxide, be formed simultaneously other hydrated products, and hydrated product makes
Soil particle is coagulated together, while filling the hole in soil.
Gypsum provides enough dilatancy hyrate entringite, it can allow solid volume to expand one times or more, extrusion soil,
Fill the part hole in compacted soil；Simultaneously ettringite it is coarseer, be in needle column, they can intersect in hole,
Space structure is constituted together with hydrated calcium silicate, is played the role of supporting hole, is reduced compound drying agent gap, compensates for part
Loss of strength caused by hole further increases solidified earth intensity.
Polyacrylamide is used to absorb in mud nonabsorbable excessive water for compositions other for compound drying agent.
Sodium carbonate generates heavy metal carbonate thus by the weight of free state for reacting with the heavy metal ion in sludge
Precipitated metal gets off.
The invention has the following advantages:
1, the present invention provides a kind of compound drying agent of mud at low cost, that solidification effect is good, it can be directly used for height and contain
The solidification of water mud, while curing time is short, the intensity of clod is high after solidification, and the weight of free state in sludge can be made after solidification
Precipitated metal enveloping, achieve the effect that it is steady in a long-term, while heavy metal no longer return under certain condition it is molten.
2, compound drying agent constituent of the invention is simple, preparation manipulation is convenient.
3, compound drying agent of the invention can be used for carrying out curing process to the sludge of different moisture content.
4, compound drying agent of the invention is suitable for the sludge or mud generated from sewage treatment plant, industrial production, comes from
The mud of the generations such as river, lake.
Certainly, it implements any of the products of the present invention and does not necessarily require achieving all the advantages described above at the same time.
Specific embodiment
A kind of compound drying agent proposed by the present invention, is made by the following method:
Step 1 takes industrial residue to be milled；
Step 2, the industrial residue that will be milled add suitable with lime and mixture of fly ash, sodium carbonate and gypsum and clay mixture
Amount water is uniformly mixed and mud cake block is made；
Step 3 will be milled after the drying drying of gained mud cake block；
Milling mud cake obtained by step 3 is uniformly mixed to obtain the final product by step 4 with cement and polyacrylamide.
The present invention provides the specific method of application of two kinds of compound drying agents in Treatment of Sludge:
Method 1: it specifically includes:
S1, by the sludge condensation of processing to be solidified or be diluted to water content be 75-85%；
S2, the sludge after concentration is uniformly mixed with compound drying agent by the weight ratio of 3-9:1；
S3, the plastic film standing for protecting gas insulation effect is played in mix surface covering；
S4,2-6 hours are stood, opens film on surface and suitable quantity of water is spread using spray head.
Method 2, specifically includes:
S01, to water content to be processed greater than 90% sludge in addition filler be uniformly mixed adjust water content to
75-85% is aerated 3-5 hours；
S02, compound drying agent is added into sludge and is mixed evenly.
Filler select in lime and mixture of fly ash, gypsum and clay mixture, industrial residue any one or it is more
Kind.
Compound drying agent accounts for the 9-13% of sludge and packing quality sum.
Illustrate the formula of sludge curing agent in conjunction with embodiment below:
Formulation Example 1:
Compound drying agent includes: cement 30%, lime and mixture of fly ash 10%, gypsum and glues by weight percentage
Earth mixtures 10%, industrial residue 8%, sodium carbonate 5%, polyacrylamide 37%.
Lime and mixture of fly ash include lime 50%, flyash 50% by weight percentage.
Gypsum and clay mixture include gypsum 50%, clay 50% by weight percentage.
Formulation Example 2:
Compound drying agent includes: cement 27%, lime and mixture of fly ash 9%, gypsum and glues by weight percentage
Earth mixtures 9%, industrial residue 8%, sodium carbonate 6%, polyacrylamide 41%.
Lime and mixture of fly ash include lime 20%, flyash 80% by weight percentage.
Gypsum and clay mixture include gypsum 80%, clay 20% by weight percentage.
Formulation Example 3:
Compound drying agent includes: cement 33%, lime and mixture of fly ash 11%, gypsum and glues by weight percentage
Earth mixtures 10%, industrial residue 6%, sodium carbonate 4%, polyacrylamide 36%.
Lime and mixture of fly ash include lime 80%, flyash 20% by weight percentage.
Gypsum and clay mixture include gypsum 30%, clay 70% by weight percentage.
Take compound drying agent obtained by above-mentioned formulation Example 1-3 that two kinds of compound desiccation provided by the invention are respectively adopted
Application method of the agent in Treatment of Sludge carries out Treatment of Sludge, and detects to sludge before and after the processing, and detection structure is as follows
Shown in table:
Note: A group is used and is matched using formulation Example 1 and method 2, C group using formulation Example 1 and method 1, B group
Square embodiment 2 and method 1, D group use formulation Example 2 and method 2, E group to use formulation Example 3 and method 1, E
Group uses commercially available curing agent and side using commercially available curing agent and method 1, H group using formulation Example 3 and method 2, G group
Method 2；
Wherein, the water content that water content is 14 days after solidifying.
Wherein, the unconfined compressive strength that the intensity in upper table refers to.
As can be known from the above table, solidified using compound drying agent prepared by the present invention for Treatment of Sludge, curing efficiency is high, solidifies
Sludge water retention property is good afterwards, sludge intensity with higher after solidification.
In the description of this specification, the description of reference term " one embodiment ", " example ", " specific example " etc. means
Particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one implementation of the invention
In example or example.In the present specification, schematic expression of the above terms may not refer to the same embodiment or example.
Moreover, particular features, structures, materials, or characteristics described can be in any one or more of the embodiments or examples to close
Suitable mode combines.
Present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.There is no detailed for preferred embodiment
All details are described, are not limited the invention to the specific embodiments described.Obviously, according to the content of this specification,
It can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is in order to better explain the present invention
Principle and practical application, so that skilled artisan be enable to better understand and utilize the present invention.The present invention is only
It is limited by claims and its full scope and equivalent.
Claims (10)
1. a kind of compound drying agent, which is characterized in that by weight percentage include: that cement 25-35%, lime and flyash are mixed
Close object 8-12%, gypsum and clay mixture 8-12%, industrial residue 5-10%, sodium carbonate 3-7%, polyacrylamide 30-
45%.
2. a kind of compound drying agent according to claim 1, which is characterized in that the compound drying agent is with weight percent
Meter includes: cement 30%, lime and mixture of fly ash 10%, gypsum and clay mixture 10%, industrial residue 8%, carbonic acid
Sodium 5%, polyacrylamide 37%.
3. a kind of compound drying agent according to claim 1 or 2, which is characterized in that the lime and mixture of fly ash
It by weight percentage include lime 0-100%, flyash 0-100%.
4. a kind of compound drying agent according to claim 1 or 2, which is characterized in that the gypsum and clay mixture with
Weight percent meter includes gypsum 0-100%, clay 0-100%.
5. a kind of preparation method of compound drying agent as described in claim 1-4 is any one, which is characterized in that including walking as follows
It is rapid:
Step 1 takes industrial residue to be milled；
Milling industrial residue and lime and mixture of fly ash, sodium carbonate and gypsum and clay mixture are added suitable quantity of water by step 2
It is uniformly mixed and mud cake block is made；
Step 3 will be milled after the drying drying of gained mud cake block；
Milling mud cake obtained by step 3 is uniformly mixed to obtain the final product by step 4 with cement and polyacrylamide.
6. a kind of application of any one compound drying agent of claim 1-4 in Treatment of Sludge.
7. a kind of application of the compound drying agent according to claim 6 in Treatment of Sludge, which is characterized in that specifically answer
Include: with method
S1, by the sludge condensation of processing to be solidified or be diluted to water content be 75-85%；
S2, the sludge after concentration is uniformly mixed with compound drying agent by the weight ratio of 3-9:1；
S3, the plastic film standing for protecting gas insulation effect is played in mix surface covering；
S4,2-6 hours are stood, opens film on surface and suitable quantity of water is spread using spray head.
8. a kind of application of the compound drying agent according to claim 6 in Treatment of Sludge, which is characterized in that specifically answer
Include: with method
Addition filler, which is uniformly mixed, in S01, the sludge to water content to be processed greater than 90% adjusts water content to 75-
85%, it is aerated 3-5 hours；
S02, compound drying agent is added into sludge and is mixed evenly.
9. a kind of application of the compound drying agent according to claim 8 in Treatment of Sludge, which is characterized in that the filler
Select any one or more in lime and mixture of fly ash, gypsum and clay mixture, industrial residue.
10. a kind of application of the compound drying agent according to claim 8 in Treatment of Sludge, which is characterized in that described multiple
Close the 9-13% that drying agent accounts for sludge and packing quality sum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811592117.8A CN109970314A (en) | 2018-12-25 | 2018-12-25 | A kind of compound drying agent and its preparation and application |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811592117.8A CN109970314A (en) | 2018-12-25 | 2018-12-25 | A kind of compound drying agent and its preparation and application |
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| CN109970314A true CN109970314A (en) | 2019-07-05 |
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| CN201811592117.8A Pending CN109970314A (en) | 2018-12-25 | 2018-12-25 | A kind of compound drying agent and its preparation and application |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110818212A (en) * | 2019-12-02 | 2020-02-21 | 河北蓝江生物环保科技有限公司 | Efficient sludge drying agent for drying sludge and use method thereof |
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| US20140245930A1 (en) * | 2011-11-02 | 2014-09-04 | Empire Technology Development Llc | Solidifying sludge |
| CN106698872A (en) * | 2016-11-30 | 2017-05-24 | 中冶华天工程技术有限公司 | Fast sludge curing agent and method with slag as main raw material |
| CN108046697A (en) * | 2017-12-14 | 2018-05-18 | 福建港湾岩土工程集团有限公司 | A kind of rapid-hardening curing agent for urban rivers and lakes sludge solidification dredging |
| CN109020462A (en) * | 2018-09-08 | 2018-12-18 | 佛山市禅城区诺高环保科技有限公司 | A kind of mud environment protection curing agent |
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2018
- 2018-12-25 CN CN201811592117.8A patent/CN109970314A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140245930A1 (en) * | 2011-11-02 | 2014-09-04 | Empire Technology Development Llc | Solidifying sludge |
| WO2014127974A2 (en) * | 2013-02-22 | 2014-08-28 | S.P.C.M. Sa | Method for treating suspensions of solid particles in water using post hydrolyzed polymers |
| CN106698872A (en) * | 2016-11-30 | 2017-05-24 | 中冶华天工程技术有限公司 | Fast sludge curing agent and method with slag as main raw material |
| CN108046697A (en) * | 2017-12-14 | 2018-05-18 | 福建港湾岩土工程集团有限公司 | A kind of rapid-hardening curing agent for urban rivers and lakes sludge solidification dredging |
| CN109020462A (en) * | 2018-09-08 | 2018-12-18 | 佛山市禅城区诺高环保科技有限公司 | A kind of mud environment protection curing agent |
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| CN110818212A (en) * | 2019-12-02 | 2020-02-21 | 河北蓝江生物环保科技有限公司 | Efficient sludge drying agent for drying sludge and use method thereof |
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Application publication date: 20190705 |