CN108341583A - A kind of sludge dehydration conditioner and its dewatering - Google Patents
A kind of sludge dehydration conditioner and its dewatering Download PDFInfo
- Publication number
- CN108341583A CN108341583A CN201710045895.4A CN201710045895A CN108341583A CN 108341583 A CN108341583 A CN 108341583A CN 201710045895 A CN201710045895 A CN 201710045895A CN 108341583 A CN108341583 A CN 108341583A
- Authority
- CN
- China
- Prior art keywords
- sludge
- conditioner
- dehydration
- dewatering
- quick lime
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General 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)
- Treatment Of Sludge (AREA)
Abstract
A kind of sludge dehydration conditioner and its dewatering, are related to urban domestic sewage sludge technical field.Sludge dehydration conditioner of the present invention includes two kinds of materials of flyash and quick lime.The weight of the flyash accounts for 17% ~ 75%, remaining is quick lime, and the content of free calcium oxide of the quick lime is 50% ~ 70%.Compared with the existing technology, the present invention is a kind of inorganic composite conditioner, can reach preferable sludge dewatering pretreating effect, significantly reduces moisture percentage in sewage sludge, and of low cost.
Description
Technical field
The present invention relates to urban domestic sewage sludge technical fields, especially sludge dehydration conditioner and its dewatering.
Background technology
Sludge is the by-product occurred during sewage treatment plant's treated sewage, generally refer between liquid and solid it
Between concentrated thing, can use pump conveying, but be difficult to settle be separated by solid-liquid separation.Make sludge containing a large amount of moisture in sludge
It is bulky.By taking the sewage treatment plant of 200,000 tons of treated sewage of a day as an example, the sludge generated daily is up to 1000m3If
Advanced treating is carried out, the amount of sludge fortunately increases by 0.5 ~ 1.0 times.With gradually increasing for sewage plant and carrying for sewage treatment capacity
Height, sludge yield is also gradually riseing, by taking China as an example, municipal sewage plant of China is discharged every year at present sludge quantity（It is dry
Weight）Ten thousand tons about more than 3000, the 17.4% of China's domestic waste total amount is accounted for, however the peace of wastewater treatment in China factory sludge
Full disposition rate is less than 35%, and secondary pollution phenomenon caused by the sludge without harmless treatment is arbitrarily thrown out without care is still very serious.In sludge
Containing a large amount of harmful substance, such as parasite, pathogenic microorganism, carcinogenic organic matter difficult to degrade, heavy metal, and with very
Strong pungent odor.It with the universal of sewage disposal and promotes, the yield of sludge is increasing, long if untreated
Far-reaching and expendable influence can be constituted on ecological environment, water body environment, living environment, become restriction development in the case of time
Bottleneck problem, the final sustainable development for influencing the mankind and hide some dangers for for the development of the mankind and the stabilization of ecology.
Currently, the method for disposal of sludge mainly have sanitary landfills, compost agricultural and burn etc..It either burns, fill also
It is compost recycling, the high-moisture percentage of sludge is all to limit its key factor subsequently disposed.The sewage plant run now
The moisture percentage in sewage sludge of secondary settling tank discharge is up to 98% or even 99%, and moisture percentage in sewage sludge maintains 97% after the concentrated processing of sludge is discharged
Left and right.The concept of sludge specific resistance is introduced herein, and sludge specific resistance is the composite target for indicating sludge filtration characteristic, its physics meaning
Justice：The resistance when sludge of unit mass filters under a certain pressure in unit filter area.The effect of resistivity is than less
Same sludge（Or after different amounts of intermixture is added in same sludge）Strainability.Usual sludge specific resistance is bigger, strainability
It is poorer.One thinks sludge specific resistance 109~1010s2When between/g, with regard to poor, resistivity exists the strainability of sludge（0.5~0.9）
×109s2When between/g, the strainability of sludge is general, when resistivity is less than 0.4 × 109s2When/g, sludge filtration better performances.
Currently, the dehydration technique development of sludge is very fast, such as natural desiccation, mechanical dehydration（By filter type：Vacuum filter,
Pressure filtration, centrifugal filtration and squeeze and filter）, it is dry, burn etc..But before dehydration, more universal use conditioner is understood to wet
Sludge carries out physicochemical property improvement（Such as resistivity）, so that follow-up dewatering process reaches most economical operational effect.Currently, domestic
Outer common dehydrating and conditioning agent is mainly chemical amendment, such as poly- propionamide, Polyferric Sulfate, poly-aluminium be organic and inorganic polymer chemical combination
Object, and the quality of conditioning effect has substantial connection, concentration basin with medicament kind and quality, added amount of chemical and environmental factor
The moisture content of sludge mud cake after dehydration increases the cost input of sludge subsequent processing 75% or more.China is big absolutely at this stage
For most sewage plant sludges after gravity concentration, a series of process of mechanical dehydration, moisture content still has 70% ~ 80%.I
The common sludge dewatering treatment equipment investment of state's sewage plant accounts for the 30% ~ 40% of sewage treatment plant's gross investment, and operating cost accounts for about dirt
The 20% ~ 50% of water treatment plant's overall running cost.
Currently, the sludge dehydration conditioner of Cheap highly effective is the emphasis of research, it is the developing direction in future, is sludge treatment
With a technical barrier of recycling.Currently, the several patents document in terms of sludge dehydration conditioner is as follows：
（1）《A kind of method of modifying in sludge handling process and its application》（Publication number CN1693242A）
The sludge that moisture content is 70% ~ 80% is handled as conditioner using troilite or flyash, is added in quenched whipping process dry
Sludge is adjusted to the sludge that moisture content is 30% ~ 35% and is discharged by the dry mud that moisture content is 5% ~ 8% after dry.Gained sludge dewatering is easy,
It is applied to brickmaking, can prevents occurring drawing crack phenomenon in surface in brick-bank drying course, improve the quality of adobe.This method processing
Object is the sludge that the moisture content after mechanical dehydration is 70% ~ 80%.
（2）《Sludge dewatering and stabilization treatment method》（Publication number CN1693242A）
This patent is related to a kind of sludge dewatering and stabilization treatment method, is heated by the sludge that is 75% ~ 82% to moisture content dry
It is dry and alkaline powdery calcium oxide material powder two-step process is added into sludge, dehydration and stabilization processes are carried out to sludge.Alkalinity
Granular material be calcium oxide powder, oxidation sodium powder, magnesia powder, magnesium oxychloride, can with some additional industrial residue alkalinity powders,
Such as flyash, industrial dust.The method can obtain the lower sludge of moisture content, and process object is also to contain after mechanical dehydration
The sludge that water rate is 80% or so.
（3）《Sludge high-efficiency dehydration conditioner》（Publication number CN1621371）
With the agent of inorganic polymer dehydrating and conditioning, the agent of organic polymer dehydrating and conditioning, pulverized limestone（Gao is counted）It is made a kind of high for raw material
Imitate dehydrating and conditioning agent.Its combined weight is calculated as：40 ~ 90 parts of inorganic polymer dehydrating and conditioning agent, organic polymer dehydrating and conditioning agent
0.5 ~ 12 part, pulverized limestone（Gao is counted）5 ~ 55 parts.The disadvantages of this solution is to reach preferable dehydration effect, is needed higher
Organic polymer dehydrating and conditioning agent, cost increase；And subsequent sludge cake recycles difficulty.
（4）《The chemical amendment and its dewatering of sludge dewatering》（Publication number CN1986788）
Using molysite, calcium salt or calcium oxide as chemical amendment, first add water quenched in sludge, then first adds in the sludge after quenched
Molysite, additive amount is the 0.2% ~ 1.5% of sludge, and is stirred 1 ~ 6 minute；Again plus calcium salt and/or calcium oxide, additive amount are sludge
1% ~ 4.5%, and stir 2-8 minutes.Quenched good sludge is finally carried out positive press-dehydrating, dwell pressure 1.0MPa ~ 0.2MPa is protected
It is release blowing after 45 ~ 90 minutes to press the time, and the moisture content of positive pressure dehydrated sludge is 50% ~ 60%.The chemistry that this method uses
Conditioner is mainly molysite, calcium salt or calcium oxide, and is that substep adds, and complex process, dehydrated sludge moisture content is still 50%
More than, effect is general.
（5）《High-effective composite filter aid and its application process for sludge dewatering》（Publication number CN101182095）
A kind of high-effective composite filter aid of sludge dewatering is disclosed, and raw material components and weight percent content are：Al2O3 20%~
30%, SiO240% ~ 55%, CaO22%-8%, swelling ± 3% ~ 13%, iron powder 4% ~ 10%；It on this basis can be with additional Fe2O3
3% ~ 10%, MgO 0.6% ~ 2%, K2O 1% ~ 2.5%, Na2O 0.1%~0.7%.Mass percent is added into the sludge after precipitation is
2% ~ 6% high-effective composite filter aid, moisture content can be down to 40% ~ 50%.This method process object is thickened sludge, compound drainage
The composition of agent includes as many as 9 kinds, and preparation process is complicated.
Invention content
In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a kind of sludge dehydration conditioner and its
Dewatering.It is a kind of inorganic composite conditioner, can reach preferable sludge dewatering pretreating effect, significantly reduces sludge
Moisture content, and it is of low cost.
In order to reach foregoing invention purpose, technical scheme of the present invention is realized as follows：
A kind of sludge dehydration conditioner, is structurally characterized in that, it includes two kinds of materials of flyash and quick lime.The flyash
Weight accounts for 17% ~ 75%, remaining is quick lime, and the content of free calcium oxide of the quick lime is 50% ~ 70%.
In above-mentioned sludge dehydration conditioner, the optimization weight percent of the flyash is 37% ~ 64%.
Using the sewage dewatering of sludge dehydration conditioner as described above, its steps is：
（1）It is quenched：By uniform stirring in conditioner addition sludge, the weight percent of sludge dehydration conditioner and sludge is
6%~20%。
（2）Dehydration：Sludge after uniform stirring is subjected to mechanical dehydration.
The present invention is as a result of mentioned component and its dewatering, with cheap inorganic material quick lime and industrial residue
Flyash is that raw material is made into sludge dehydration conditioner, has technological operation simple, the feature that performance is stablized.Compared with technology phase
Than haing the following advantages：
（1）The conditioner added in the present invention is all cheap inorganic material, conventional cpolyacrylamids flocculant is substituted, after dehydration
Mud cake be easy to the raw material as building materials.
（2）Moisture content of the cake can be down to 45% ~ 60% after sludge dewatering in the present invention, and sludge specific resistance is down to 106~l07S2/
g.Due to the reduction of resistivity, for natural drying after 2 ~ 3 days, moisture content can drop to 40% or less.
Description of the drawings
Fig. 1 is the sludge dehydration device connection figure using the present invention.
Specific implementation mode
Sludge dehydration conditioner of the present invention includes two kinds of materials of flyash and quick lime, and the weight of wherein flyash accounts for 17% ~
75%, the weight percent for optimizing flyash is 37% ~ 64%, remaining is quick lime, and the content of free calcium oxide of wherein quick lime is
50%~70%。
Referring to Fig. 1, the sludge in sludge dehydration device is derived from the excess sludge of secondary sedimentation tank of sewage treatment work, and moisture content is
98%；Flyash meets level-one flyash requirement in flyash concrete application technology specification (GBJ146-90)；Quick lime meets
People's Republic of China's building material industry standard silicate building products quick lime（JC/T 621-1996）The requirement of certified products,
The content of free calcium oxide of its quick lime is 60% or so.
It is using the dewatering step of sludge dehydration conditioner of the present invention：
（1）It is quenched：Secondary settling tank discharge excess sludge by valve 1 enter agitating device 3, sludge dehydration conditioner by into
The weight percent of uniform stirring in the addition sludge of material mouth 2, sludge dehydration conditioner and sludge is 6% ~ 20%.
（2）Dehydration：The mixture of sludge and sludge dehydration conditioner after stirring evenly is by valve 24 through sludge pump 5
It is dehydrated into sludge dewatering equipment 6, dewatered mud cake directly carries out next step recycling, and the water for being dehydrated generation returns
Treatment tank 7 is handled.
With reference to embodiment, the present invention is described in further detail.
Sludge specific resistance is using conventional assay method：Sludge dewatering experiment is carried out using the vacuum degree of 0.08MPa.It recorded
The amount of filtrate V and filtrate total volume for filtering time t and corresponding moment, carry out that sludge specific resistance is calculated.
Embodiment 1：
Sludge dehydration conditioner raw material components and percent by weight are：Flyash 17%, quick lime 83%.
Dewatering is：6% sludge dehydration conditioner stirring is added in secondary settling tank excess sludge makes itself and sludge mixing
Enter plate and frame filter press dehydration through sludge pump after uniformly, obtains the mud cake that moisture content is 57.6%.Modulated sludge specific resistance is
1.33×107 S2/g。
Embodiment 2：
Sludge dehydration conditioner raw material components and percent by weight are：Flyash 50%, quick lime 50%.
Dewatering is：10% inorganic composite sludge dehydration conditioner stirring is added in secondary settling tank excess sludge makes it
Enter plate and frame filter press dehydration through sludge pump after being uniformly mixed with sludge, obtains the mud cake that moisture content is 49.25%.It is modulated
Sludge specific resistance is 5.7 × 106 S2/g。
Embodiment 3：
Sludge dehydration conditioner raw material components and percent by weight are：Flyash 37.5%, quick lime 62.5%.
Dewatering is：8% sludge dehydration conditioner stirring is added in secondary settling tank excess sludge makes itself and sludge mixing
Enter sludge dewatering equipment dehydration through sludge pump after uniformly, obtains the mud cake that moisture content is 52.4%.Modulated sludge specific resistance is
1.3×107 S2/g。
The present invention obtains conditioner with cheap raw material quick lime and coal ash for manufacturing and improves the excess sludge of secondary settling tank.
The electrical neutralization of wherein flyash is acted on adsorption bridging, can destroy the stability of sludge colloidal solid, is conducive to dispersion little particle
Aggregation, improve dewatering.Quick lime in sludge dehydration conditioner of the present invention can not only play Coagulation aiding, Er Qieke
To form alkaline environment, microorganism is killed, deodorization is played the role of.
Claims (3)
1. a kind of sludge dehydration conditioner, which is characterized in that it includes two kinds of materials of flyash and quick lime, the flyash
Weight accounts for 17% ~ 75%, remaining is quick lime, and the content of free calcium oxide of the quick lime is 50% ~ 70%.
2. sludge dehydration conditioner according to claim 1, which is characterized in that the optimization weight percent of the flyash is
37%~64%。
3. using the sewage dewatering of sludge dehydration conditioner as described in claim 1, its steps is：
（1）It is quenched：By uniform stirring in conditioner addition sludge, the weight percent of sludge dehydration conditioner and sludge is
6%~20%；
（2）Dehydration：Sludge after uniform stirring is subjected to mechanical dehydration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710045895.4A CN108341583A (en) | 2017-01-22 | 2017-01-22 | A kind of sludge dehydration conditioner and its dewatering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710045895.4A CN108341583A (en) | 2017-01-22 | 2017-01-22 | A kind of sludge dehydration conditioner and its dewatering |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108341583A true CN108341583A (en) | 2018-07-31 |
Family
ID=62974477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710045895.4A Withdrawn CN108341583A (en) | 2017-01-22 | 2017-01-22 | A kind of sludge dehydration conditioner and its dewatering |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108341583A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110255836A (en) * | 2019-06-05 | 2019-09-20 | 路德环境科技股份有限公司 | Composition and sludge curing method for rapid curing municipal sludge |
| CN112574794A (en) * | 2020-11-17 | 2021-03-30 | 珠海红塔仁恒包装股份有限公司 | Treatment method of papermaking sludge |
| CN114230134A (en) * | 2021-12-01 | 2022-03-25 | 山东尚科环境工程有限公司 | Inorganic conditioner for municipal sludge drying treatment and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101397181A (en) * | 2008-08-15 | 2009-04-01 | 华中科技大学 | Inorganic composite conditioner and sludge dewatering method thereof |
-
2017
- 2017-01-22 CN CN201710045895.4A patent/CN108341583A/en not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101397181A (en) * | 2008-08-15 | 2009-04-01 | 华中科技大学 | Inorganic composite conditioner and sludge dewatering method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110255836A (en) * | 2019-06-05 | 2019-09-20 | 路德环境科技股份有限公司 | Composition and sludge curing method for rapid curing municipal sludge |
| CN112574794A (en) * | 2020-11-17 | 2021-03-30 | 珠海红塔仁恒包装股份有限公司 | Treatment method of papermaking sludge |
| CN114230134A (en) * | 2021-12-01 | 2022-03-25 | 山东尚科环境工程有限公司 | Inorganic conditioner for municipal sludge drying treatment and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101691272B (en) | Sludge dewatering method | |
| WO2009082886A1 (en) | A sludge concentrated dehydration method | |
| CN100519452C (en) | High-effective composite filter aid for sludge dehydration and method of use thereof | |
| CN101397181A (en) | Inorganic composite conditioner and sludge dewatering method thereof | |
| CN101786787A (en) | Sludge dewatering integrated process | |
| CN105330123A (en) | Formula for deep dehydration of sludge and operation method of formula | |
| CN108358431A (en) | A kind of Sludge Chemical Conditioning deep dehydration method | |
| CN102452781A (en) | Carbon-based sludge composite regulating and dehydrating agent based on sludge incineration | |
| CN102001814B (en) | Conditioning mehtod for sludge dehydration | |
| CN104445863A (en) | Method for achieving deep sludge dehydration and energy utilization on plate-and-frame filter press | |
| CN104724897A (en) | Sludge dewatering conditioning agent and use method thereof | |
| CN104261652A (en) | Efficient sludge dewatering flocculant | |
| CN103524014A (en) | Harmless treatment method of fly ash | |
| CN108341583A (en) | A kind of sludge dehydration conditioner and its dewatering | |
| CN112661431A (en) | Method for preparing baking-free brick after washing and desalting fly ash | |
| CN104529127A (en) | Sludge dewatering method for coating plate-and-frame filter press with filter aid medium in advance | |
| CN109368985B (en) | Sludge dewatering method | |
| CN103241922A (en) | Compounded sludge dewatering conditioner and application and method thereof | |
| CN103073170B (en) | Deep sludge dehydrated method based on magnetic super-strong absorbent | |
| CN111573984A (en) | Coal washing wastewater treatment system | |
| CN111620539A (en) | Deep dehydration tempering method for sludge | |
| CN110092562A (en) | A kind of sludge dewatering by plate-frame method and conditioner used | |
| CN106865926A (en) | One kind has filled municipal sludge curing agent and its deep dehydration method | |
| CN104016567B (en) | A kind of mud magnetic dewatering agent and dewatering thereof | |
| CN113461304B (en) | Red mud-based mixed acid chemical conditioner special for deep dehydration of dehydrated sludge and use method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180731 |