CN101921050A - Device and method for dewatering and drying mud under water - Google Patents

Device and method for dewatering and drying mud under water Download PDF

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Publication number
CN101921050A
CN101921050A CN2010102427821A CN201010242782A CN101921050A CN 101921050 A CN101921050 A CN 101921050A CN 2010102427821 A CN2010102427821 A CN 2010102427821A CN 201010242782 A CN201010242782 A CN 201010242782A CN 101921050 A CN101921050 A CN 101921050A
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China
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water
mud
sludge dewatering
stage
treatment
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CN2010102427821A
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CN101921050B (en
Inventor
倪其军
高扬
睢爱国
杨栋
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702th Research Institute of CSIC
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702th Research Institute of CSIC
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Priority to CN201010242782.1A priority Critical patent/CN101921050B/en
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Publication of CN101921050B publication Critical patent/CN101921050B/en
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Abstract

The invention relates to a device and a method for dewatering and drying mud under water. The device comprises a filter sieve, a filter press, a purification tower and a centrifugal machine, wherein the filter sieve is connected in series with a delivery pump through a pipeline; input pipelines of the filter press, the purification tower and the centrifugal machine are provided with flocculating agent adding machines; and a water outlet of the centrifugal machine is connected to an input port of the purification tower. A plurality of water treatment equipment are selected reasonably and a complete set of device is established based on the advantages of various equipment, so that the defect of low treatment efficiency of single equipment is overcome and dewatering and drying treatment can be efficiently performed on mud under water. The device and the method have the characteristics of reducing time needed by natural drying of a mud yard, improving mud treatment efficiency, greatly lowering dredging cost and meeting the requirement of mass, batched and engineered mud treatment, along with small floor area, low energy consumption, no blocking in continuous operation, high mud yield, good mobility, convenient arrangement on a mud treatment site and the like.

Description

Water-bed sludge dewatering desiccation apparatus and method
Technical field
The present invention relates to the environmental protection equipment field, especially water-bed sludge dewatering desiccation apparatus and method.
Background technology
Lake water pollution in recent years, the pollution substance accumulation in the bed mud settling is serious, and nitrogen, phosphorus, organic equal size are higher relatively, thereby for the general outburst of blue-green algae and lake provides necessary nutritive element, so particularly important to the removing of bottom mud in lake.The bottom mud in lake water content is big, adopts the mud drying technique can alleviate the transport pressure of subsequent disposal greatly, improves desilting efficiency data, reduces the desilting cost.Present mud drying technique both domestic and external mainly adopts chemosetting method or dehydration and drying method.The process object of chemosetting method mainly is the water ratio height, have mobile mud, needs to add a large amount of solidifying agent and weighting agent, and difficulty is bigger during actual the use, and cost is higher.The dehydration and drying method mainly is to utilize mechanical dehydration to realize solid-liquid separation, the single solid-liquid separating equipment of normal at present employing, and for example vacuum filter, plate-and-frame filter press, belt filter press or horizontal centrifuge carry out solid-liquid separation; These equipment claimed are carried out pre-treatment to sewage, and water outlet can not directly discharge usually, can't be used for sludge treatment engineering extensive, mass, and treatment effect is very undesirable.
Summary of the invention
The mechanical dewatering equipment form that the applicant adopts at above-mentioned existing water-bed mud mummification is single; water outlet can not directly be discharged; can't mass-producing, the shortcoming of mass production; a kind of water-bed sludge dewatering desiccation apparatus and method are provided; technology is reasonable; it is low to consume energy, can mass-producing, mass carries out the mud drying and other treatment.
The technical solution adopted in the present invention is as follows:
A kind of water-bed sludge dewatering desiccation apparatus, comprise the filter sieve, pressure filter, scavenging tower and the whizzer that are connected in series by pipeline and transferpump, the intake line of wherein said pressure filter, scavenging tower and whizzer is provided with the flocculation agent adding machine, and the water port of whizzer is connected to the input aperture of described scavenging tower.It is further characterized in that:
Described filter sieve is vibratory screening apparatus or roller grizzly;
Described pressure filter is plate-and-frame filter press or belt filter press.
The water-bed sludge dewatering drying method that adopts said apparatus to carry out, carry out level Four to sewage and handle:
The first step adopts filter sieve to carry out pre-treatment to containing dirt water;
The second stage adopts pressure filter to carry out sludge dewatering;
The third stage adopts scavenging tower that secondary treatment is carried out in the pressure filter water outlet;
The fourth stage adopts whizzer that the scavenging tower thickened sludge is dewatered, and whizzer effluent recycling to higher level's scavenging tower is handled again.It is further characterized in that:
In the water inlet of the described second stage, the third stage, the fourth stage, be added with flocculation agent;
Described flocculation agent is polymerize aluminum chloride and polyacrylamide;
Polymerize aluminum chloride interpolation concentration is 100~150ppm in partial water inlet; It is 6~8ppm that polyacrylamide adds concentration;
Polymerize aluminum chloride interpolation concentration is 20~50ppm in the water inlet of the third stage; It is 1~3ppm that polyacrylamide adds concentration;
Polymerize aluminum chloride interpolation concentration is 200ppm in the water inlet of the fourth stage; It is 5~10ppm that polyacrylamide adds concentration.
Choose reasonable multiple water treatment equipment of the present invention utilizes the advantage of various device to make up complete assembly, has avoided the low defective of single equipment processing efficiency, can carry out water-bed sludge dewatering drying and other treatment efficiently.The present invention has characteristics such as floor space is little, energy consumption is low, working continuously does not have obstruction, and mud volume is big, and mobility is good, can be arranged at the sludge treatment scene easily; Not only reduced the mud stockyard nature required time of mummification, improved the efficient of sludge treatment, the cost of desilting simultaneously also reduces greatly, satisfies the needs of mass-producing, mass, through engineering approaches processing mud.When actual job, mud cake output quantity is big, and the scavenging tower water outlet reaches the primary standard in the discharge index (GB18918-2002) fully.
Description of drawings
Fig. 1 is a water-bed sludge dewatering desiccation apparatus connection diagram of the present invention;
Fig. 2 is the front view of vibratory screening apparatus among Fig. 1;
Fig. 3 is the front view of belt filter press among Fig. 1;
Fig. 4 is the front view of scavenging tower among Fig. 1;
Fig. 5 is the front view of whizzer among Fig. 1;
Fig. 6 is a water-bed sludge dewatering drying method detail flowchart of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described.
As shown in Figure 1, water-bed sludge dewatering desiccation apparatus of the present invention comprises vibratory screening apparatus 100, pressure filter 200, the scavenging tower 300 and whizzer 400 that is connected in series by pipeline and transferpump, wherein said pressure filter 200, scavenging tower 300 are provided with the flocculation agent adding machine with the intake line of whizzer 400, and the water port 407 of whizzer 400 is connected to the inlet of described scavenging tower 300.With reference to Fig. 6, water-bed sludge dewatering drying method of the present invention mainly is divided into level Four and carries out sludge treatment.
The first step: contain the dirt water pretreatment.Select for use vibratory screening apparatus 100 as the pre-processing device that contains dirt water.In the desilting in lake, river, dredging engineering, solid refuse and impurity in the bed mud are more, must just can carry out follow-up sludge dewatering through pre-treatment.The principle of work of vibratory screening apparatus is that two motor synchronous reverse rotations make vibrator produce reverse exciting force, forces sieve nest to drive screen cloth and does longitudinal motion, makes material on it be subjected to exciting force and the process of periodically dishing out forward, thereby finishes the screening of material.As shown in Figure 1 and Figure 2, the top of frame 104 is provided with the screen cloth 103 of inclination, screen cloth 103 is up-down vibration under the effect of vibratory pump 102, the buffer tank 101 effusive sewage that contain solid refuse and impurity, its liquid flows out by the sieve aperture filtration of screen cloth 103 and from water outlet 105, and oarse-grained solid refuse or impurity can not pass through sieve aperture, and move downward along the inclined-plane, finally fall into the vibratory screening apparatus mud collection box 601 that the side is provided with.
Certainly, filter sieve such as employing roller grizzly also can be finished this pre-treatment step, are used for the big solid impurity of initial gross separation muddy water; But vibratory screening apparatus provides reverse exciting force by vibratory pump, and the mesh of its screen cloth is difficult for resulting in blockage in preprocessing process, has saved the time of back flushing, has improved processing efficiency.
The second stage: sludge dewatering.The present invention selects for use belt filter press 200 as device for dehydrating sladge waste, and the principle of work of belt filter press is that pressure is applied on the strainer, and mud is squeezed on two strainers, because of the pressure or the tension force of filter cloth makes sludge dewatering.As shown in Figure 3, belt filter press 200 mainly is made up of with turning down strainer 213 the revolution strainer 205 of going up that is arranged above and below, last revolution strainer 205 rotates counterclockwise under the driving of last turning wheel 208, and turning down strainer 213 clockwise rotates under the driving of runner 214 next time; Adjacent facets between the last turning down strainer is relatively set with rolling shaft 212 in the strainer inboard; The strainer top is provided with the flushing mouth of a river 207, is used to wash strainer; Below strainer, be provided with T type sluicing groove 206; Be provided with upper blade 209 and lower coating blade 210 in strainer revolution end, be used for striking off residual impurity respectively attached on the strainer.As shown in Figure 1, vibratory screening apparatus water outlet 502 enters concentration response jar 202 with flocculation agent 503 merging of the flocculation agent adding machine 201 that bypass imports, flocculation reaction takes place in retort, retort water outlet 504 flows into the surge tank 204 of belt filter press 200, and discharging is on revolution strainer 205 on the belt filter press 200, earlier under the effect of gravity, dehydration leaches through T type sluicing groove 206 filtrate through strainer, realized preliminary solid-liquid separation, stay mud 203 after revolution the concentrating on the strainer 205 and then be brought into adjacent facets between the turning down strainer, under the roll extrusion squeezing of rolling shaft 212, dewater, filtrate 211 flow to the sluicing groove of below and discharges, and the mud behind the press dewatering forms pressure filter mud cake 602.
Certainly, also can adopt plate-and-frame filter press to finish this step, reach the purpose of sludge dewatering; But belt filter press is than other like products, and suitability is wider, mechanical property is excellent, weather resistance is strong, power consumption is low, noise is little, sludge yield is high, but continuous production is a kind of ideal through engineering approaches device for dehydrating sladge waste.
The third stage: water outlet secondary treatment.The pressure filter water outlet 505 of belt filter press 200 can not directly be discharged, and the present invention sets up the secondary treatment equipment of scavenging tower 300 as tail water.As shown in Figure 4, the present invention adds the flocculation agent 506 that flocculation agent adding machine 301 prepares by a certain percentage in advance with pressure filter water outlet 505 by the bypass dosing pipe, input to retort 302 then and carry out thorough mixing, and enter the inlet of scavenging tower 300 by the outlet conduit 507 at retort top.When equipment is initially debugged, be arranged at the water sample that the pipeline 305 of different heights is derived by observation, know the response situation in the knockout tower, add dose thereby can regulate; After equipment debugging finished continuously operation for some time, scavenging tower water outlet 508 was discharged from the water outlet 303 of cat head, and this moment, effluent quality was better, met direct emission standards, can be in line to the lake; At the bottom of tower, discharge by bottom mud mouth 304 through settled mud water.The part of scavenging tower water outlet 508 can be used as reuse water 509, can be delivered to each equipment as water for cleaning by the reuse pipeline, has improved the utilising efficiency of internal recycle water.
Scavenging tower is equivalent to a movably settling tank, utilizes the principle work of flocculation sediment, gravity separation.Than settling tank, the mud knockout tower not only can reach the effect of settling tank, but also it is little to have floor space, saves land resources; Reduce investment outlay, do not need to build the pond and be equipped with the special-purpose mud equipment of scraping; The handiness height is not limited to advantages such as point of fixity use.
The fourth stage: thickened sludge dehydration.The present invention adopts the concentrated mud of 400 pairs of scavenging tower of whizzer to carry out processed, can avoid concentrated mud to be back to a joint device processes flocculating effect is exerted an influence.As shown in Figure 5, whizzer 400 frames are provided with same rotary middle spindle, with the rotating cylinder 406 and the spiral conveyer of sense of rotation, spiral conveyer is made up of hollow spindle 403 and the blade 405 that is fixed in main shaft 403 outer circumference surfaces, low speed rotation under its driving wheel 402 that is provided with in the end drives, and while rotating cylinder 406 high speed rotating.As shown in Figure 1, scavenging tower concentrates muddy water 510 and has converged the flocculation agent 511 that bypass input flocculation agent adding machine 401 prepares by a certain percentage in advance, enter hollow spindle 403 inner chambers of whizzer 400, throw away to the space between main shaft 403 and the rotating cylinder 406 by the some dispensing orifices 404 that distribute on the main shaft shown in Figure 5, because spiral conveyer and rotating cylinder 406 rotate in the same way, but rotating speed difference, the dehydrated sludge cake 603 that proportion is bigger is got rid of to the inner side-wall of rotating cylinder 406, and in the propelling movement of blade 405 down to the spiral conveyer end, discharge by mud discharging mouth 408, the less parting liquid of proportion is then discharged from the water port 407 of the other end.Separating machine water outlet 512 refluxes and is delivered to the inlet of scavenging tower equipment, reenters scavenging tower and handles, and prevents separating machine water outlet 512 direct exhaust emission environment.
The water treatment flocculation medicament main component that the present invention uses is PAC (polymerize aluminum chloride), PAM (polyacrylamide).PAC is an inorganic coagulant, and when being added to a certain threshold value, its hydrolysate precipitation is rapidly separated out, and micelle in the water and fine suspension can be caught as nucleus or absorption net when forming by these throw outs, become tiny flco; PAM is an organic polymer coargulator, and it is the water-soluble long-chain compound, and ionization goes out a large amount of dissociable groups when hydrolysis, thereby catches the effect that tiny flco plays flocculation by electrical neutralization, bridge formation adsorption net.The pharmaceutical quantities that belt filter press, scavenging tower and whizzer added sees Table 1.
Table 1 medicine component and content
PAC adds dose (ppm) PAM adds dose (ppm)
Belt filter press 100-150 6-8
Scavenging tower 20-50 1-3
Whizzer 200 5-10
The present invention adopts scavenging tower to utilize the principle of flocculation sediment gravity separation that purifying treatment is carried out in the water outlet of belt filter press, whizzer, rapid flocculation sedimentation under the effect of efficient flocculant, this processing mode can effectively be removed the plurality of impurities composition in the sewage, the complete qualified discharge of water outlet (GB18918-2002 one-level A), solved the problem that its water outlet can not directly be discharged, Inlet and outlet water water quality synopsis sees Table 2, and extracting part divides water outlet as the reuse water cleaning equipment, has saved water resources.
Table 2 Inlet and outlet water water quality synopsis
More than describing is explanation of the invention, is not that institute of the present invention restricted portion is referring to claim to the qualification of invention, and under the situation of spirit of the present invention, the present invention can do any type of modification, for example adopts other flocculation agents such as biological flocculant.Perhaps, set up sludge treatment device to improve its throughput with under the prerequisite of through engineering approaches running as purpose; Set up equalizing tank between unit for treating water at different levels, control water quality, the water yield reach the purpose of optimum operation effect with this optimum handling concentration and treatment capacity that satisfies distinct device.

Claims (9)

1. water-bed sludge dewatering desiccation apparatus, it is characterized in that: comprise the filter sieve, pressure filter, scavenging tower and the whizzer that are connected in series by pipeline and transferpump, the intake line of wherein said pressure filter, scavenging tower and whizzer is provided with the flocculation agent adding machine, and the water port of whizzer is connected to the input aperture of described scavenging tower.
2. according to the described water-bed sludge dewatering desiccation apparatus of claim 1, it is characterized in that: described filter sieve is vibratory screening apparatus or roller grizzly.
3. according to the described water-bed sludge dewatering desiccation apparatus of claim 1, it is characterized in that: described pressure filter is plate-and-frame filter press or belt filter press.
4. the water-bed sludge dewatering drying method that adopts the described device of claim 1 to carry out is characterized in that, sewage is carried out level Four handle:
The first step adopts filter sieve to carry out pre-treatment to containing dirt water;
The second stage adopts pressure filter to carry out sludge dewatering;
The third stage adopts scavenging tower that secondary treatment is carried out in the pressure filter water outlet;
The fourth stage adopts whizzer that the scavenging tower thickened sludge is dewatered, and whizzer effluent recycling to higher level's scavenging tower is handled again.
5. according to the described water-bed sludge dewatering drying method of claim 4, it is characterized in that: in the water inlet of the described second stage, the third stage, the fourth stage, be added with flocculation agent.
6. according to the described water-bed sludge dewatering drying method of claim 5, it is characterized in that: described flocculation agent is polymerize aluminum chloride and polyacrylamide.
7. according to the described water-bed sludge dewatering drying method of claim 6, it is characterized in that: polymerize aluminum chloride interpolation concentration is 100~150ppm in partial water inlet; It is 6~8ppm that polyacrylamide adds concentration.
8. according to the described water-bed sludge dewatering drying method of claim 6, it is characterized in that: polymerize aluminum chloride interpolation concentration is 20~50ppm in the water inlet of the third stage; It is 1~3ppm that polyacrylamide adds concentration.
9. according to the described water-bed sludge dewatering drying method of claim 6, it is characterized in that: polymerize aluminum chloride interpolation concentration is 200ppm in the water inlet of the fourth stage; It is 5~10ppm that polyacrylamide adds concentration.
CN201010242782.1A 2010-08-03 2010-08-03 Device and method for dewatering and drying mud under water Expired - Fee Related CN101921050B (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102489073A (en) * 2011-11-16 2012-06-13 河海大学 Construction method for rapidly dehydrating dredging mud by centrifugation and plate frame
CN105417790A (en) * 2015-12-30 2016-03-23 黄敬超 Movable belt type condensing and filter-pressing complete machine
CN105693060A (en) * 2014-01-23 2016-06-22 天紫环保装备制造(天津)有限公司 Small sludge harmless disposal system provided with movable baffle
CN105923970A (en) * 2016-04-20 2016-09-07 上海城隧盛业建设发展有限公司 Slurry-water separation system and slurry-water separation method
CN106006888A (en) * 2016-06-29 2016-10-12 浙江瑞霖环保科技有限公司 Sewage sludge joint treatment technology
CN106542278A (en) * 2015-09-18 2017-03-29 山东浩海疏浚装备有限公司 A kind of integral type dehydrating and curing waggon
CN106565072A (en) * 2016-10-20 2017-04-19 杭州同美水处理技术有限公司 Sludge treatment method
WO2018045543A1 (en) * 2016-09-09 2018-03-15 Kemira Oyj Process for improved sludge dewatering
CN109574457A (en) * 2018-12-28 2019-04-05 合肥森特环境工程有限公司 A kind of energy-saving and environment-friendly dewatering technology of mud
CN109879571A (en) * 2019-03-12 2019-06-14 中交疏浚技术装备国家工程研究中心有限公司 Bottom-mud dewatering desiccation optimal control method

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CN101696077A (en) * 2009-10-21 2010-04-21 黑旋风工程机械开发有限公司 Method for screening and dewatering urban sludge efficiently
CN101774746A (en) * 2010-01-29 2010-07-14 濮阳市天地人环保工程技术有限公司 Treatment method of waste slurry generated by gigging well and drilling

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CA2287996A1 (en) * 1997-04-30 1998-11-05 Ciba Specialty Chemicals Water Treatments Limited Dewatering of sewage sludge
CN1215030A (en) * 1998-09-25 1999-04-28 上海市杨浦区河道管理所 Post-dosing centrifugal dewatering technology for slurry machine used in municipal engineering
CN1262242A (en) * 1999-02-05 2000-08-09 陈茂铨 Process for treating sludge
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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102489073A (en) * 2011-11-16 2012-06-13 河海大学 Construction method for rapidly dehydrating dredging mud by centrifugation and plate frame
CN105693060A (en) * 2014-01-23 2016-06-22 天紫环保装备制造(天津)有限公司 Small sludge harmless disposal system provided with movable baffle
CN106542278A (en) * 2015-09-18 2017-03-29 山东浩海疏浚装备有限公司 A kind of integral type dehydrating and curing waggon
CN105417790A (en) * 2015-12-30 2016-03-23 黄敬超 Movable belt type condensing and filter-pressing complete machine
CN105923970A (en) * 2016-04-20 2016-09-07 上海城隧盛业建设发展有限公司 Slurry-water separation system and slurry-water separation method
CN106006888A (en) * 2016-06-29 2016-10-12 浙江瑞霖环保科技有限公司 Sewage sludge joint treatment technology
WO2018045543A1 (en) * 2016-09-09 2018-03-15 Kemira Oyj Process for improved sludge dewatering
CN106565072A (en) * 2016-10-20 2017-04-19 杭州同美水处理技术有限公司 Sludge treatment method
CN109574457A (en) * 2018-12-28 2019-04-05 合肥森特环境工程有限公司 A kind of energy-saving and environment-friendly dewatering technology of mud
CN109879571A (en) * 2019-03-12 2019-06-14 中交疏浚技术装备国家工程研究中心有限公司 Bottom-mud dewatering desiccation optimal control method

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Assignee: Jiangsu Dongfang Ecology Dredging Engineering Co.,Ltd.

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Denomination of invention: Device and method for dewatering and drying mud under water

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Assignee: Jiangsu Dongfang Ecology Dredging Engineering Co.,Ltd.

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Denomination of invention: Device and method for dewatering and drying mud under water

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