CN103739182A - Dehydration method of heterogeneous sludge - Google Patents

Dehydration method of heterogeneous sludge Download PDF

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Publication number
CN103739182A
CN103739182A CN201310732871.8A CN201310732871A CN103739182A CN 103739182 A CN103739182 A CN 103739182A CN 201310732871 A CN201310732871 A CN 201310732871A CN 103739182 A CN103739182 A CN 103739182A
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Prior art keywords
sludge
filter
dewatering
dehydration
chamber
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CN201310732871.8A
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CN103739182B (en
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钟新钢
田绪平
孙一钍
阮宇科
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ZHEJIANG HUAZHANG TECHNOLOGY Co Ltd
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ZHEJIANG HUAZHANG TECHNOLOGY Co Ltd
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Abstract

The invention relates to a dehydration method of heterogeneous sludge. According to the dehydration method, firstly, mixed sludge is pre-dehydrated by a chamber type filter press and crushed by a crusher, and then crushed sludge filter cakes are put into a steel belt filter press for secondary crushing through a middle hopper bin. The dehydration method disclosed by the invention can effectively solve the problem about intermittent work mode of an existing filter press, changes intermittent work into continuous work by effectively combining the chamber type filter press with the steel belt filter press, and integrates the characteristics that a plate frame type filter press realizes rapid dehydration when treating low-concentration mixed sludge and the steel belt filter press realizes rapid dehydration when treating high-concentration mixed sludge, so that the dehydration time is effectively saved and the production speed is increased; meanwhile, due to the dehydration process, the usage amounts of additives can be saved and the virtuous circle of enterprise production is guaranteed.

Description

A kind of dewatering of heterogeneous mud
 
Technical field
The present invention relates to a kind of dewatering of mud, particularly a kind of dewatering being mixed by the mud of heterogeneity, i.e. a kind of dewatering of heterogeneous mud.
 
Background technology
Along with the continuous increase of development and the industrial output of urbanization process, the quantity discharged of sewage is also growing with each passing day, and the harmless treatment of mud has also been proposed to new requirement.
The water content of current various mud is generally more than 97%, and will make mud have utility value, must make its water ratio be reduced to below 50%, therefore need to carry out processed to mud.And in the market the dehydration of mud is mainly adopted to following several mode: (1) heating power mummification method: add dewatering agent or dried material in mud, be aided with the baking of large heat, to reach mud, reduce the object of water ratio, but this method energy consumption consumption is high, use cost is high, the final mud producing, after reaching use standard, is still realized its use value by burning.(2) plate-and-frame filter press evaporation: plate-and-frame filter press has obvious dehydrating effect 60% time processing water ratio to water ratio in 98% lower concentration sludge dewatering, but process water ratio 60% to water ratio during the mud 50%, be limited by the restriction of machine construction and processing method, efficiency is not high, and production capacity is lower.(3) belt filter press evaporation: the dehydration feature of belt filter press is to have the property of working continuously, machine easy care, but after entering strainer, easily runs in lower concentration mud mud, filter cake particle is thinner, output is lower, but when the water ratio of mud is during at 60%-70%, has higher processing efficiency, limited the fitness of machine, and the moiety of heterogeneous mixing sludge is complicated, concentration is low, dehydration difficulty.Therefore, how to improve the dehydrating effect of mud, adopt high-efficiency dehydration technique and method, become the key that improves production capacity.
 
Summary of the invention
For the deficiencies in the prior art, the invention provides the mud dewatering method that a kind of dewatering time is short, dehydrating effect good, production capacity is high, thereby realize the operation mode of efficient low investment.
A dewatering for heterogeneous mixing sludge, comprises the following steps:
1), undressed mixing sludge and white lime are carried out to mix and blend in the modified pond of mud, the weight ratio of mixing sludge and white lime is 1:0.1, churning time 10-20 minute;
2), the mixture after stirring is delivered into sewage sludge feed pump, and add dewatering agent, the weight ratio of material and dewatering agent is 1:0.001-0.003;
3), said mixture material is delivered into chamber-type press filter, carry out predrainage, dewatering time 60 minutes;
4), adopt chamber-type press filter to dewater mixture to obtain the sludge filter cake that water ratio is 60%-65%, leave chamber-type press filter, enter in charging crusher and carry out fragmentation, making the sludge filter cake particle after preliminary fragmentation is 30mm;
5), sludge filter cake particle is loaded on mobile hopper, and by hopper, be sent in the distributor of steel band pressure filter, and enter pressure chamber by distributor, carry out further stirring broken, making final sludge filter cake particle is 15mm-20mm, and sludge filter cake uniform spreading is located on the strainer of steel band pressure filter.Adopt this kind of dewatering, in technical process, the usage quantity of adding white lime and dewatering agent is all the additions of not retrodicting and drawing under the perfect condition of water content at mud.As the dewatered sludge of 10 tons of final needs, the sludge filter cake that the water ratio of take is so 50% calculates just needs 20 tons of these materials, and whole dehydration process needs 2 tons of white limes, 20 kilograms-60 kilograms of dewatering agents.
After described steel band press filtration, the water ratio of sludge filter cake particle is 50%-55%.
The operating pressure of described steel band pressure filter pressure chamber is divided into three nips, the first nip 70 Kg/cm 2, the second nip 120 Kg/cm 2, the 3rd nip 150 Kg/cm 2.
Described chamber-type press filter is comprised of frame filter plate, filter cloth, oil cylinder, feed system and discharge system.
The beneficial effect that the present invention has: different with the conventional dewatering that existing market adopts, can effectively overcome plate and frame(type)filter press dewatering time length and steel band type pressure filter not good shortcoming of dehydrating effect when processing lower concentration mixing sludge when processing high density mixing sludge, and feature that can only service intermittent for plate and frame(type)filter press, the first step of dehydration using chamber-type press filter as mixing sludge, and by middle hopper storehouse is set, efficiently solve the step mode of operation of existing pressure filter, chamber-type press filter and the effective combination of steel band pressure filter, thereby realize service intermittent and be converted into continous way work, and combine the fast and steel band type pressure filter of plate and frame(type)filter press dehydration when processing lower concentration mixing sludge in the processing high density mixing sludge fast feature of dewatering, effectively save dewatering time, improved production rate, and can effectively prevent that plate and frame(type)filter press from being 60% while being 50% stage to water ratio processing water ratio, because increasing, sludge concentration cause the situation that filter cloth stops up to occur, meanwhile, three kinds of different pressure ranges are set in steel band pressure filter, can a nearly step improve the dewatering efficiency of mud, thereby reach the effect of quick, high mass dryness fraction, high yield, meanwhile, this dewatering process also can be saved the usage quantity of additive, guarantees the benign cycle that enterprise produces.
 
Accompanying drawing explanation
Fig. 1 is process flow diagram of the present invention;
Fig. 2 is the structural representation of chamber-type press filter of the present invention.
 
Embodiment
With reference to the concrete case study on implementation only providing for explanation below, preparation details of the present invention and advantage will be clearer.It should be noted that, these embodiment are not for limiting the scope of the invention.
Embodiment 1: as depicted in figs. 1 and 2, a dewatering for heterogeneous mud during equipment operation, carries out mix and blend by undressed mixing sludge and white lime in the modified pond of mud, the weight ratio of mixing sludge and white lime is 1:0.1, churning time 10 minutes, mixture after stirring is delivered into sewage sludge feed pump, and add dewatering agent, the weight ratio of material and dewatering agent is 1:0.001, said mixture material is delivered in the envelope of chamber-type press filter by opening for feed 1, carry out predrainage, dewatering time 60 minutes, mixture is dewatered and obtained the sludge filter cake that water ratio is 60%-65% by chamber-type press filter, dehydration moisture is out discharged from liquid outlet 2, sludge filter cake leaves after chamber-type press filter, filter cake flakes off on rotary conveyor 3, then be transported to and in charging crusher 4, carry out fragmentation, making the sludge filter cake particle after preliminary fragmentation is 30mm, through preliminary broken sludge filter cake particle afterwards, enter in middle hopper storehouse 5, and middle hopper storehouse 5 can move left and right on track 6, the translational speed in middle hopper storehouse 5 can realize variable frequency control by motor, middle hopper storehouse 5 can be moved to the left gradually along with the increase of sludge filter cake particle, when arriving, set after weight-carrying capacity, middle hopper storehouse 5 moves right by track 6, in moving process, filter cake particle constantly enters in distributor 7 from the discharge orifice of middle bunker 5 bottoms, along with middle hopper storehouse 5 constantly moves right, hopper is progressively emptying.Now in distributor 7, be full of material, can make steel band machine work 30 minutes, meanwhile, chamber-type press filter starts discharge, and middle hopper storehouse 7 starts to be moved to the left, storing progressively, while moving to Far Left within 30 minutes, chamber-type press filter discharge is complete, and middle hopper storehouse 7 storings are complete, start again to move right, carry out the feed circulation of next round.And sludge filter cake particle further stirs the pressure chamber that enters steel band pressure filter after fragmentation by distributor 7, the operating pressure of steel band pressure filter pressure chamber is divided into three nips, the first nip 70 Kg/cm 2, the second nip 120 Kg/cm 2, the 3rd nip 150 Kg/cm 2, by the 5 minutes time of pressure chamber, making final sludge filter cake particle is 15mm-20mm, water ratio is 55%, thereby meets industrial requirement of next stage.
 
Embodiment 2: as depicted in figs. 1 and 2, a dewatering for heterogeneous mud during equipment operation, carries out mix and blend by undressed mixing sludge and white lime in the modified pond of mud, the weight ratio of mixing sludge and white lime is 1:0.1, churning time 20 minutes; Mixture after stirring is delivered into sewage sludge feed pump, and add dewatering agent, the weight ratio of material and dewatering agent is 1:0.003; Said mixture material is delivered in the envelope of chamber-type press filter by opening for feed 1, carry out predrainage, dewatering time 60 minutes, mixture is dewatered and obtained the sludge filter cake that water ratio is 60%-65% by chamber-type press filter, dehydration moisture is out discharged from liquid outlet 2, sludge filter cake leaves after chamber-type press filter, filter cake flakes off on rotary conveyor 3, then be transported to and in charging crusher 4, carry out fragmentation, making the sludge filter cake particle after preliminary fragmentation is 30mm, and moisture is discharged from liquid outlet 2; Preliminary broken sludge filter cake particle afterwards enters in middle hopper storehouse 5, and middle hopper storehouse 5 can move left and right on track 6, the translational speed in middle hopper storehouse 5 can realize variable frequency control by motor, middle hopper storehouse 5 can be moved to the left gradually along with the increase of sludge filter cake particle, when arriving, set after weight-carrying capacity, middle hopper storehouse 5 moves right by track 6, in moving process, filter cake particle constantly enters in distributor 7 from the discharge orifice of middle bunker 5 bottoms, along with middle hopper storehouse 5 constantly moves right, hopper is progressively emptying.Now in distributor 7, be full of material, can make steel band machine work 30 minutes, meanwhile, chamber-type press filter starts discharge, and middle hopper storehouse 7 starts to be moved to the left, storing progressively, while moving to Far Left within 30 minutes, chamber-type press filter discharge is complete, and middle hopper storehouse 7 storings are complete, start again to move right, carry out the feed circulation of next round.And sludge filter cake particle further stirs the pressure chamber that enters steel band pressure filter after fragmentation by distributor 7, the operating pressure of steel band pressure filter pressure chamber is divided into three nips, the first nip 70 Kg/cm 2, the second nip 120 Kg/cm 2, the 3rd nip 150 Kg/cm 2, by the 10 minutes time of pressure chamber, making final sludge filter cake particle is 15mm-20mm, water ratio is 50%, thereby meets industrial requirement of next stage.

Claims (4)

1. a dewatering for heterogeneous mixing sludge, comprises the following steps:
1), undressed mixing sludge and white lime are carried out to mix and blend in the modified pond of mud, the weight ratio of mixing sludge and white lime is 1:0.1, churning time 10-20 minute;
2), the mixture after stirring is delivered into sewage sludge feed pump, and add dewatering agent, the weight ratio of material and dewatering agent is 1:0.001-0.003;
3), said mixture material is delivered into chamber-type press filter, carry out predrainage, dewatering time 60 minutes;
4), adopt chamber-type press filter to dewater mixture to obtain the sludge filter cake that water ratio is 60%-65%, leave chamber-type press filter, enter in charging crusher and carry out fragmentation, making the sludge filter cake particle after preliminary fragmentation is 30mm;
5), sludge filter cake particle is loaded on mobile hopper, and by hopper, be sent in the distributor of steel band pressure filter, and enter pressure chamber by distributor, carry out further stirring broken, making final sludge filter cake particle is 15mm-20mm, and sludge filter cake uniform spreading is located on the strainer of steel band pressure filter.
2. the dewatering of a kind of heterogeneous mixing sludge according to claim 1, is characterized in that: after steel band press filtration, the water ratio of sludge filter cake particle is 50%-55%.
3. the dewatering of a kind of heterogeneous mixing sludge according to claim 1, is characterized in that: the operating pressure of described steel band pressure filter pressure chamber is divided into three nips, the first nip 70 Kg/cm 2, the second nip 120 Kg/cm 2, the 3rd nip 150 Kg/cm 2.
4. the dewatering of a kind of heterogeneous mixing sludge according to claim 1, is characterized in that: described chamber-type press filter is comprised of frame filter plate, filter cloth, oil cylinder, feed system and discharge system.
CN201310732871.8A 2013-12-26 2013-12-26 Dehydration method of heterogeneous sludge Active CN103739182B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110845112A (en) * 2019-09-17 2020-02-28 上海中耀环保实业有限公司 Method and device for reducing water content of sludge

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CN101708941A (en) * 2009-12-11 2010-05-19 广州普得环保设备有限公司 Secondary pressurizing and dehydrating method for sludge
CN101863611A (en) * 2010-06-13 2010-10-20 东南大学 Method for deeply dehydrating sludge
CN101857353A (en) * 2010-07-02 2010-10-13 胶南市易通热电有限责任公司 Processing method for sludge with high water content
CN202359089U (en) * 2011-11-29 2012-08-01 曾秀仪 Production equipment of sludge biomass environment-friendly fuel
JP2013184084A (en) * 2012-03-06 2013-09-19 Kurita Water Ind Ltd Inorganic sludge dewatering agent for filter press
CN102617013A (en) * 2012-04-24 2012-08-01 浙江海拓环境技术有限公司 Method for concentrating and dehydrating sludge
CN102674657A (en) * 2012-06-11 2012-09-19 安徽国祯环保节能科技股份有限公司 Sludge dewatering method for urban sewage plant
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Publication number Priority date Publication date Assignee Title
CN110845112A (en) * 2019-09-17 2020-02-28 上海中耀环保实业有限公司 Method and device for reducing water content of sludge

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Denomination of invention: Dehydration method of heterogeneous sludge

Effective date of registration: 20180802

Granted publication date: 20150318

Pledgee: Bank of Hangzhou Limited by Share Ltd Tongxiang branch

Pledgor: Zhejiang Huazhang Technology Co., Ltd.

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