CN100443428C - Sludge deep dehydration method - Google Patents

Sludge deep dehydration method Download PDF

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Publication number
CN100443428C
CN100443428C CNB2006101235527A CN200610123552A CN100443428C CN 100443428 C CN100443428 C CN 100443428C CN B2006101235527 A CNB2006101235527 A CN B2006101235527A CN 200610123552 A CN200610123552 A CN 200610123552A CN 100443428 C CN100443428 C CN 100443428C
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Prior art keywords
mud
industrial chemicals
sludge
moisture
pressure
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CN1962496A (en
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钟环声
李雷
杨海英
李观尚
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Guangzhou Utlity Environmental Technology Co Ltd
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GUANGZHOU PUDE ENVIRONMENTAL PROTECTION FACILITY CO Ltd
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Abstract

The invention discloses a deep dehydrating method of sludge, which comprises the following steps: a. tempering; adding filtrate in the sludge; adding chemical raw material with Fe3+ to stir; reacting for 2-12min; adding chemical raw material with Ca2+ to stir; reacting for 3-15min; b. dehydrating; introducing tempered sludge into filter press; filtering the water in the sludge; maintaining pressure at 1.5Mpa-2.5Mpa for 30-70min.

Description

The method of deeply dehydrating sludge
Technical field
The invention belongs to field of sludge treatment, specifically relate to a kind of method 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.If adopt the mechanical filter method to sludge dewatering, 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, causes effect undesirable.Therefore existing mechanical processing method at mud, the current sewage disposal of incompatibility.
Summary of the invention
The present invention solves the technical problem of above existence, provides a kind of dehydrating effect good, and technology is simple, makes the method for the water ratio of mud at the deeply dehydrating sludge below 60%.
The present invention is achieved in that a kind of method of deeply dehydrating sludge, and its step 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 Fe that the inventive method is used 3+The addition of industrial chemicals is 0.3~2%.
The Ca that the inventive method is used 2+The addition of industrial chemicals is 0.5~5%.
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.Method of the present invention, finish dewatering process by modified and two steps of dehydration, the method of utilizing chemistry to combine with machinery, after making the electric charge of colloidal solid obtain neutralization, particle is unsteady state, adheres to each other between the particle, settles down at last, fall by the moisture filter of pressure filter, reach the purpose of dehydration mud.
Embodiment
The method of deeply dehydrating sludge of the present invention, its step 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, make that dehydration is more thorough.
The Fe that the inventive method is used 3+The addition of industrial chemicals is 0.3~2%, used Ca 2+The addition of industrial chemicals is 0.5~5%, can reach best effect.
Below in conjunction with embodiment, the present invention is described in detail.
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 (3)

1. the method for a deeply dehydrating sludge is characterized in that, the step of this method 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.
2. the method for deeply dehydrating sludge according to claim 1 is characterized in that, described Fe 3+The addition of industrial chemicals is 0.3~2%.
3. the method for deeply dehydrating sludge according to claim 1 is characterized in that, described Ca 2+The addition of industrial chemicals is 0.5~5%.
CNB2006101235527A 2006-11-15 2006-11-15 Sludge deep dehydration method Active CN100443428C (en)

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Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101234841B (en) * 2008-01-02 2011-03-23 广州普得环保设备有限公司 Sludge concentration dehydration method
CN101696077B (en) * 2009-10-21 2011-06-08 黑旋风工程机械开发有限公司 Method for screening and dewatering urban sludge efficiently
CN102249514A (en) * 2010-05-17 2011-11-23 唐菊香 Low-energy drying treatment method for discharged sludge
CN101948232A (en) * 2010-09-30 2011-01-19 黄杨 Sludge treatment method
CN102060429B (en) * 2011-02-16 2012-06-27 河南华天环保科技有限公司 Conditioner for sludge dewatering and dewatering method of sludge
CN102795755A (en) * 2011-05-27 2012-11-28 广州绿由工业弃置废物回收处理有限公司 Sludge deep dehydrating system and sludge deep dehydrating method
CN102491618A (en) * 2011-11-29 2012-06-13 曾秀仪 Depth dehydration method for residual sludge
CN102531329A (en) * 2012-01-09 2012-07-04 苏州格瑞特环保科技产业发展有限公司 Organic composite flocculant for conditioning and dehydration of sludge

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JP2000301200A (en) * 1999-04-19 2000-10-31 Monotekku Kk Sludge dehydrating treatment method and apparatus
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CN1107444A (en) * 1994-02-23 1995-08-30 机械电子工业部机械工业环境保护技术研究所 Auto-controlling system for dewatering sludge
JP2000301200A (en) * 1999-04-19 2000-10-31 Monotekku Kk Sludge dehydrating treatment method and apparatus
CN1621371A (en) * 2003-11-24 2005-06-01 曾智勇 Highly effective amendment for sludge dehydration

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城市污水处理厂污泥物化法减量试验研究. 王铮.CNKI中国优秀博硕士学位论文全文数据库. 2004
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