CN1962495A - Additive for sludge deep dehydration - Google Patents
Additive for sludge deep dehydration Download PDFInfo
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- CN1962495A CN1962495A CN 200610123551 CN200610123551A CN1962495A CN 1962495 A CN1962495 A CN 1962495A CN 200610123551 CN200610123551 CN 200610123551 CN 200610123551 A CN200610123551 A CN 200610123551A CN 1962495 A CN1962495 A CN 1962495A
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- Prior art keywords
- mud
- additive
- industrial chemicals
- moisture
- pressure
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Abstract
The invention discloses an additive of deep dehydrated sludge, which consists of 0.3-2% Fe3+ chemical raw material and 0.5-5% Ca2+ chemical raw material. The charge of colloid particle is neutralized with particle unstably, which sediments to filter water.
Description
Technical field
The invention belongs to the sludge treatment technology, specifically relate to a kind of additive of deeply dehydrating sludge.
Background technology
Ignore easily and be that very crucial processing unit is a sludge treatment for one in the sewage disposal, the key of sludge treatment is a mud glue, moisture existence form in the mud has four kinds: 1, interstitial water or free-water, be present between mud granule, and account for 65～85% of sludge water content; 2, capillary water is present in the kapillary between mud granule, accounts for 15～20% of sludge water content; 3, planar water is adsorbed on a part of water on the mud granule; 4, cellular water is present in mud granule inside.Wherein interstitial water and planar water account for 70～80% of total water content in the mud, and planar water and cellular water account for about 10% of total water content in the mud, and the moisture that therefore removes this part seems especially crucial!
Interstitial water is easy to remove in theory, but because mud is to be formed by cotton-shaped colloidal solid set, particle is very thin and very soft.When applying external force, gelationus subparticle will be blocked established filter bridge, has increased specific drainage pressure; And because soft particle has certain compressibility, when external force increased, particle can form one deck hole very little " curtain " on the filtration medium surface, thereby water can't be passed through, and dehydration just seems difficult unusually.
In order to address this problem, can only add flocculating aids, representative is diatomite and lime, but will obtain effect preferably, addition is all bigger, makes the cost height.The increasing of diatomite and lime addition has limited the approach of subsequent disposal comprehensive utilization.
Summary of the invention
The present invention solves the technical problem of above existence, provides a kind of and makes that the admixture addition is little, the additive of the deeply dehydrating sludge that cost is low.
The present invention is achieved in that a kind of additive of deeply dehydrating sludge, and it comprises and contains Fe
3+Industrial chemicals and contain Ca
2+Industrial chemicals.
The described Fe that contains
3+The content of industrial chemicals is 0.3～2%.
The described Ca that contains
2+The content of industrial chemicals is 0.5～5%.
The interpolation step of this additive is as follows:
A, modified, after the adding filtrate, interpolation contains Fe in mud
3+Industrial chemicals stirs, and behind question response 2～12min, interpolation contains Ca again
2+Industrial chemicals stirs, question response 3～15min;
B, dehydration are introduced pressure filter to modified good mud the moisture filter in the mud are fallen, and under the pressure of 1.5MPa～2.5MPa pressurize 30～70min.
The mud colloidal solid has adsorbed many moisture and has become planar water owing to capillary effect, colloidal solid has bilayer structure and the surperficial electric charge that all has same nature, and generally electronegative, they repel mutually, hinder agglomeration of particles, grow up, make particle keep steady state.Additive of the present invention is containing Fe
3+Industrial chemicals and contain Ca
2+Under the effect of industrial chemicals, make the electric charge of colloidal solid obtain neutralization after, particle is unsteady state, adheres to each other between the particle, settles down at last, is fallen by the moisture filter of pressure filter with mud, reaches the purpose of dehydration.
Embodiment
The additive of deeply dehydrating sludge of the present invention, it comprises and contains Fe
3+Industrial chemicals and contain Ca
2+Industrial chemicals wherein contains Fe
3+The content of industrial chemicals is 0.3～2%, contains Ca
2+The content of industrial chemicals is 0.5～5%.
After additive uses, make the electric charge of colloidal solid obtain neutralization, particle is unsteady state, adheres to each other between the particle, settles down at last, is fallen by the moisture filter of pressure filter with mud, reaches the purpose of dehydration.Additive of the present invention is implemented by following several embodiment, can both reach make mud water ratio below 60%, for subsequent treatment and comprehensive utilization provides beneficial conditions.
Embodiment 1
1, get moisture 80.6% municipal sludge, adding filtrate, to transfer to moisture be about 90%;
2, add the 1# additive, promptly contain Fe
3+Industrial chemicals, addition are 0.5%, fully stirring reaction 8min;
3, add the 2# additive then, promptly contain Ca
2+Industrial chemicals, addition are 1.5%, fully stirring reaction 5min;
4, inject plate-and-frame filter press by the anti-mud that mixes up of ram pump, advancing mud pressure is 0.3MPa, when reaching the mud amount, behind pressurize 40min under the pressure about 1.8MPa, so that the moisture in the mud is taken off;
5, after pressurize is finished, the release blowing.
Experimental data proves that after the dehydration, the water ratio of mud reaches 57.3%, meets processing requirements.
Embodiment 2
1, get moisture 78.4% municipal sludge, adding filtrate, to transfer to moisture be about 90%;
2, add the 1# additive, promptly contain Fe
3+Industrial chemicals, addition are 1%, fully stirring reaction 10min;
3, add the 2# additive then, promptly contain Ca
2+Industrial chemicals, addition are 2%, fully stirring reaction 5min;
4, inject plate-and-frame filter press by the anti-mud that mixes up of ram pump, advancing mud pressure is 0.3MPa, when reaching the mud amount, behind pressurize 50min under the pressure about 2.0MPa, so that the moisture in the mud is taken off;
5, after pressurize is finished, the release blowing.
Experimental data proves that after the dehydration, the water ratio of mud reaches 55.8%, meets processing requirements.
Embodiment 3
1, get moisture 80.2% municipal sludge, adding filtrate, to transfer to moisture be about 90%;
2, add the 1# additive, promptly contain Fe
3+Industrial chemicals, addition are 0.3%, fully stirring reaction 5min;
3, add the 2# additive then, promptly contain Ca
2+Industrial chemicals, addition are 2.5%, fully stirring reaction 5min;
4, inject plate-and-frame filter press by the anti-mud that mixes up of ram pump, advancing mud pressure is 0.3MPa, when reaching the mud amount, behind pressurize 50min under the pressure about 2.0MPa, so that the moisture in the mud is taken off;
5, after pressurize is finished, the release blowing.
Experimental data proves that after the dehydration, the water ratio of mud reaches 58.7%, meets processing requirements.
Embodiment 4
1, get moisture 79.5% municipal sludge, adding filtrate, to transfer to moisture be about 90%;
2, add the 1# additive, promptly contain Fe
3+Industrial chemicals, addition are 0.7%, fully stirring reaction 8min
3, add the 2# additive then, promptly contain Ca
2+Industrial chemicals, addition are 3%, fully stirring reaction 10min;
4, inject plate-and-frame filter press by the anti-mud that mixes up of ram pump, advancing mud pressure is 0.3MPa, when reaching the mud amount, behind pressurize 50min under the pressure about 2.5MPa, so that the moisture in the mud is taken off;
5, after pressurize is finished, the release blowing.
Experimental data proves that after the dehydration, the water ratio of mud reaches 53.3%, meets processing requirements.
Embodiment 5
1, get moisture 81.6% municipal sludge, adding filtrate, to transfer to moisture be about 90%;
2, add the 1# additive, promptly contain Fe
3+Industrial chemicals, addition are 1%, fully stirring reaction 5min
3, add the 2# additive then, promptly contain Ca
2+Industrial chemicals, addition are 0.5%, fully stirring reaction 10min;
4, inject plate-and-frame filter press by the anti-mud that mixes up of ram pump, advancing mud pressure is 0.3MPa, when reaching the mud amount, behind pressurize 50min under the pressure about 1.5MPa, so that the moisture in the mud is taken off;
5, after pressurize is finished, the release blowing.
Experimental data proves that after the dehydration, the water ratio of mud reaches 59.1%, meets processing requirements.
Embodiment 6
1, get moisture 80.9% municipal sludge, adding filtrate, to transfer to moisture be about 90%;
2, add the 1# additive, promptly contain Fe
3+Industrial chemicals, addition are 0.8%, fully stirring reaction 5min;
3, add the 2# additive then, promptly contain Ca
2+Industrial chemicals, addition are 2.5%, fully stirring reaction 10min;
4, inject plate-and-frame filter press by the anti-mud that mixes up of ram pump, advancing mud pressure is 0.3MPa, when reaching the mud amount, behind pressurize 40min under the pressure about 1.8MPa, so that the moisture in the mud is taken off;
5, after pressurize is finished, the release blowing.
Experimental data proves that after the dehydration, the water ratio of mud reaches 55.6%, meets processing requirements.
Claims (4)
1. the additive of a deeply dehydrating sludge is characterized in that, this additive comprises and contains Fe
3+Industrial chemicals and contain Ca
2+Industrial chemicals.
2. the method for deeply dehydrating sludge according to claim 1 is characterized in that, the described Fe that contains
3+The content of industrial chemicals is 0.3～2%.
3. the method for deeply dehydrating sludge according to claim 1 is characterized in that, the described Ca that contains
2+The content of industrial chemicals is 0.5～5%.
4. according to claim 1 to 3 additive of any one described deeply dehydrating sludge wherein, it is characterized in that the step of adding additive is as follows:
A, modified, after the adding filtrate, interpolation contains Fe in mud
3+Industrial chemicals stirs, and behind question response 2～12min, interpolation contains Ca again
2+Industrial chemicals stirs, question response 3～15min;
B, dehydration are introduced pressure filter to modified good mud the moisture filter in the mud are fallen, and under the pressure of 1.5MPa～2.5MPa pressurize 30～70min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610123551 CN1962495A (en) | 2006-11-15 | 2006-11-15 | Additive for sludge deep dehydration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610123551 CN1962495A (en) | 2006-11-15 | 2006-11-15 | Additive for sludge deep dehydration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1962495A true CN1962495A (en) | 2007-05-16 |
Family
ID=38081751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610123551 Pending CN1962495A (en) | 2006-11-15 | 2006-11-15 | Additive for sludge deep dehydration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1962495A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009082886A1 (en) * | 2008-01-02 | 2009-07-09 | Guangzhou Pude Environmental Protection Equipment, Ltd. | A sludge concentrated dehydration method |
| CN101863610A (en) * | 2010-06-13 | 2010-10-20 | 东南大学 | Method for secondary deep dewatering of dewatered sludge |
| CN102060429A (en) * | 2011-02-16 | 2011-05-18 | 河南华天环保科技有限公司 | Conditioner for sludge dewatering and dewatering method of sludge |
| CN102108003A (en) * | 2011-01-26 | 2011-06-29 | 郑建国 | Sludge dewatering additive |
-
2006
- 2006-11-15 CN CN 200610123551 patent/CN1962495A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009082886A1 (en) * | 2008-01-02 | 2009-07-09 | Guangzhou Pude Environmental Protection Equipment, Ltd. | A sludge concentrated dehydration method |
| CN101863610A (en) * | 2010-06-13 | 2010-10-20 | 东南大学 | Method for secondary deep dewatering of dewatered sludge |
| CN102108003A (en) * | 2011-01-26 | 2011-06-29 | 郑建国 | Sludge dewatering additive |
| CN102167489A (en) * | 2011-01-26 | 2011-08-31 | 郑建国 | Sludge treatment process |
| CN102108003B (en) * | 2011-01-26 | 2012-12-26 | 郑建国 | Sludge dewatering additive |
| CN102060429A (en) * | 2011-02-16 | 2011-05-18 | 河南华天环保科技有限公司 | Conditioner for sludge dewatering and dewatering method of sludge |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20070516 |