CN103739182B - Dehydration method of heterogeneous sludge - Google Patents
Dehydration method of heterogeneous sludge Download PDFInfo
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- CN103739182B CN103739182B CN201310732871.8A CN201310732871A CN103739182B CN 103739182 B CN103739182 B CN 103739182B CN 201310732871 A CN201310732871 A CN 201310732871A CN 103739182 B CN103739182 B CN 103739182B
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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
Technical field
The present invention relates to a kind of dewatering of mud, particularly a kind of dewatering mixed by the mud of heterogeneity, i.e. a kind of dewatering of heterogeneous mud.
Background technology
Along with the development of urbanization process and the continuous increase of industrial output, the quantity discharged of sewage is also growing with each passing day, and it is also proposed new requirement to the harmless treatment of mud.
The water content of current various mud generally more than 97%, and will make mud have utility value, its water ratio must be made to be reduced to less than 50%, therefore need to carry out processed to mud.And in the market following several mode is mainly adopted to the dehydration of mud: (1) heating power mummification method: add dewatering agent or dried material in mud, be aided with the baking of large heat, to reach the object that mud reduces water ratio, but the consumption of this method energy consumption is high, use cost is high, the mud of final generation after reaching use standard, or realizes its use value by burning.(2) plate-and-frame filter press evaporation: plate-and-frame filter press has obvious dehydrating effect to water ratio 60% time processing the lower concentration sludge dewatering of water ratio 98%, but when processing water ratio at the mud of 60% to water ratio 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 has working continuously property, machine easy care, but after lower concentration mud enters strainer, easily run mud, filter cake particle is thinner, Yield compari@is low, but when the water ratio of mud is at 60%-70%, has higher processing efficiency, limit 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 technology and method, then become the key improving 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, thus realize the operation mode of efficient Low investment.
A dewatering for heterogeneous mixing sludge, comprises the following steps:
1), by undressed mixing sludge and white lime in the modified pond of mud, carry out mix and blend, the weight ratio of mixing sludge and white lime is 1:0.1, churning time 10-20 minute;
2), by the mixture after stirring deliver into sewage sludge feed pump, and add dewatering agent, the weight ratio of material and dewatering agent is 1:0.001-0.003;
3), by said mixture material deliver into chamber-type press filter, carry out predrainage, dewatering time 60 minutes;
4), by mixture adopt chamber-type press filter to carry out dewatering and obtain the sludge filter cake that water ratio is 60%-65%, leave chamber-type press filter, enter in charging crusher and carry out fragmentation, make the sludge filter cake particle after preliminary fragmentation be 30mm;
5), sludge filter cake particle is loaded on mobile hopper, and be sent in the distributor of steel band pressure filter by hopper, and enter pressure chamber by distributor, further stir fragmentation, make final sludge filter cake particle be 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 drawn of ideally retrodicting at mud not water content.As finally needed the dewatered sludge of 10 tons, the sludge filter cake being so 50% with water ratio calculates and just needs 20 tons of these materials, then whole dehydration process needs white lime 2 tons, dewatering agent 20 kilograms-60 kilograms.
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 made up 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 dehydration methods that existing market adopts, effectively can overcome plate and frame(type)filter press dewatering time length and steel band type pressure filter shortcoming that dehydrating effect is not good when processing lower concentration mixing sludge when processing high density mixing sludge, and can only the feature of service intermittent for plate and frame(type)filter press, using the first step that chamber-type press filter dewaters as mixing sludge, and by arranging middle hopper storehouse, efficiently solve the step mode of operation of existing pressure filter, chamber-type press filter and steel band pressure filter are effectively combined, thus 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 processing high density mixing sludge and to dewater fast feature, effective saving dewatering time, improve production rate, and can effectively preventing board paper blotter press when to process water ratio be 60% to water ratio be 50% stage, the situation causing filter cloth to block because sludge concentration increases occurs, meanwhile, three kinds of different pressure ranges are set in steel band pressure filter, a nearly step can improve the dewatering efficiency of mud, thus reach the effect of quick, high mass dryness fraction, high yield, meanwhile, this dewatering process also can save 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
Illustrate and the concrete case study on implementation that provides with reference to following being only, preparation details of the present invention and advantage will clearly.It should be noted that, these embodiments are not for limiting the scope of the invention.
Embodiment 1: as depicted in figs. 1 and 2, a dewatering for heterogeneous mud, when equipment runs, 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 adds 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 undertaken dewatering by chamber-type press filter and obtains the sludge filter cake that water ratio is 60%-65%, dehydration moisture is out discharged from liquid outlet 2, after sludge filter cake leaves chamber-type press filter, filter cake flakes off on rotary conveyor 3, then be transported in charging crusher 4 and carry out fragmentation, the sludge filter cake particle after preliminary fragmentation is made to be 30mm, sludge filter cake particle after preliminary fragmentation 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 realizes 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 after arrival setting weight-carrying capacity, middle hopper storehouse 5 is moved right by track 6, in moving process, filter cake particle constantly enters in distributor 7 from the discharge orifice bottom middle bunker 5, along with middle hopper storehouse 5 constantly moves right, hopper is progressively emptying.Now be full of material in distributor 7, steel belt machine work can be made 30 minutes, meanwhile, chamber-type press filter starts discharge, and middle hopper storehouse 7 starts to be moved to the left, progressively storing, when moving to Far Left within 30 minutes, chamber-type press filter discharge is complete, and middle hopper storehouse 7 storing is complete, start again to move right, carry out the fill cycles of next round.And sludge filter cake particle enters the pressure chamber of steel band pressure filter after further stirring 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, make final sludge filter cake particle be 15mm-20mm, water ratio is 55%, thus meets next stage industrial requirement.
Embodiment 2: as depicted in figs. 1 and 2, a dewatering for heterogeneous mud, when equipment runs, 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 adds 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 undertaken dewatering by chamber-type press filter and obtains the sludge filter cake that water ratio is 60%-65%, dehydration moisture is out discharged from liquid outlet 2, after sludge filter cake leaves chamber-type press filter, filter cake flakes off on rotary conveyor 3, then be transported in charging crusher 4 and carry out fragmentation, make the sludge filter cake particle after preliminary fragmentation be 30mm, moisture is discharged from liquid outlet 2; Sludge filter cake particle after preliminary fragmentation 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 realizes 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 after arrival setting weight-carrying capacity, middle hopper storehouse 5 is moved right by track 6, in moving process, filter cake particle constantly enters in distributor 7 from the discharge orifice bottom middle bunker 5, along with middle hopper storehouse 5 constantly moves right, hopper is progressively emptying.Now be full of material in distributor 7, steel belt machine work can be made 30 minutes, meanwhile, chamber-type press filter starts discharge, and middle hopper storehouse 7 starts to be moved to the left, progressively storing, when moving to Far Left within 30 minutes, chamber-type press filter discharge is complete, and middle hopper storehouse 7 storing is complete, start again to move right, carry out the fill cycles of next round.And sludge filter cake particle enters the pressure chamber of steel band pressure filter after further stirring 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, make final sludge filter cake particle be 15mm-20mm, water ratio is 50%, thus meets next stage industrial requirement.
Claims (2)
1. a dewatering for heterogeneous mixing sludge, comprises the following steps:
1), by undressed mixing sludge and white lime in the modified pond of mud, carry out mix and blend, the weight ratio of mixing sludge and white lime is 1:0.1, churning time 10-20 minute;
2), by the mixture after stirring deliver into sewage sludge feed pump, and add dewatering agent, the weight ratio of mixture and dewatering agent is 1:0.001-0.003;
3), by by step 2) the said mixture material that obtains delivers into chamber-type press filter, carries out predrainage, dewatering time 60 minutes;
4), chamber-type press filter is adopted to carry out dewatering and obtain the sludge filter cake that water ratio is 60%-65% the mixture obtained by step 3), leave chamber-type press filter, enter in charging crusher and carry out fragmentation, make the sludge filter cake particle after preliminary fragmentation be 30mm;
5), the sludge filter cake particle of the 30mm obtained by step 4) is loaded on mobile hopper, and be sent in the distributor of steel band pressure filter by hopper, and enter pressure chamber by distributor, further stir fragmentation, make final sludge filter cake particle be 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 made up of frame filter plate, filter cloth, oil cylinder, feed system and discharge system.
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| CN201310732871.8A CN103739182B (en) | 2013-12-26 | 2013-12-26 | Dehydration method of heterogeneous sludge |
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| CN201310732871.8A CN103739182B (en) | 2013-12-26 | 2013-12-26 | Dehydration method of heterogeneous sludge |
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| CN103739182B true CN103739182B (en) | 2015-03-18 |
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| 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 |
| CN116719240B (en) * | 2023-08-02 | 2023-11-24 | 中国一冶集团有限公司 | Dehydration control method and system of mucky soil dehydration device vehicle |
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| CN101708941B (en) * | 2009-12-11 | 2011-11-16 | 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 |
| CN101857353B (en) * | 2010-07-02 | 2012-09-12 | 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 |
| JP6123158B2 (en) * | 2012-03-06 | 2017-05-10 | 栗田工業株式会社 | 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 |
| CN102826733A (en) * | 2012-07-19 | 2012-12-19 | 南京林业大学 | Method for efficiently dewatering 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. Registration number: 2018330000216 |