CN105084698A - Microwave-heating continuous dehydration method and apparatus for sludge - Google Patents
Microwave-heating continuous dehydration method and apparatus for sludge Download PDFInfo
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- CN105084698A CN105084698A CN201410185371.1A CN201410185371A CN105084698A CN 105084698 A CN105084698 A CN 105084698A CN 201410185371 A CN201410185371 A CN 201410185371A CN 105084698 A CN105084698 A CN 105084698A
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Abstract
The invention discloses a microwave-heating continuous dehydration method and apparatus for sludge. The apparatus comprises a sludge tank, a sludge pump, a sludge heat exchange tank, a microwave-heating dehydrator and a heat exchange water pump. The apparatus provided by the invention has a fast dehydration speed and high dehydration efficiency and enables the water content of the sludge to be decreased to less than 30%; and the dehydrated sludge has compact structure and small size, thereby facilitating transport, storage and disposal of the sludge. Meanwhile, no chemical agent is needed in the process of dehydration, so pollution to the environment is reduced.
Description
Technical field
The invention belongs to the sewage in environmental engineering, technical field of sludge treatment, particularly relate to a kind of mud microwave heating continuously dehydrating method and device.
Background technology
Mud is the solid substance produced after sewage disposal at different levels, is the inevitable byproduct of sewage work, creates a large amount of water-containing sludges in wastewater treatment process.
Sludge dewatering is that the primary, concentrated of fluidised form or digested sludge are removed moisture, is converted into a kind of method for sludge treatment of semi-solid state or solid-state clod.Sludge dewatering treatment will be dewatered to mud exactly, reduces sludge volume, improves the solid content of mud.
Traditional mud dewatering method mainly comprises machinery and rolls filter dehydration, centrifuge dehydration etc.Machinery rolls the filter dehydration belt that adopts more and rolls filter or plate-and-frame filter press dehydration, and horizontal screw centrifuge is adopted in centrifuge dehydration more.With plate-and-frame filter press dehydration, although moisture percentage in sewage sludge is low, its production efficiency is low, and belt rolls filter dehydration or horizontal screw centrifuge dehydration, although can realize continuous seepage, dewatered solids moisture percentage in sewage sludge is still higher, general water ratio more than 75%.After above-mentioned dewatering dehydration, the moisture contained by mud mainly exists with the form of Bound moisture and interstitial water, is difficult to remove further, and sludge volume is large, is unfavorable for transport and the disposal of mud.
Microwave drying technology speed is fast, homogeneous heating, easy to operate, be widely used, as the drying of meat, aquatic product, fruit vegetable class, newborn class, eggs, healthcare products, medicine, tealeaves, tobacco etc., but for the rare report of sludge dewatering.Chinese patent is disclosed a kind of excess sludge dewatering based on microwave irradiation technology (publication number CN102643005A) once, realized by following steps: 1. the pipeline between settling tank and concentration basin installs one section of fiber reinforced plastic pipe additional, install microwave deceleration loading device additional in fiber reinforced plastic pipe outside; 2. the excess sludge of will discharge from settling tank, enters concentration basin through fiber reinforced plastic pipe, and the time that excess sludge is subject to microwave radiation in fiber reinforced plastic pipe is 90-130s; 3. the excess sludge after step 2 processes enters concentration basin again and carries out gravity concentration process, finally again through centrifuge dehydration process, completes excess sludge dehydration operation.But this inventive principle utilizes microwave to destroy mud flco release sludge water content, and to improve dehydrating effect, mud is follow-up still needs centrifuge dehydration or filter-press dehydration, and moisture percentage in sewage sludge is still about 75%, fails to realize deep dehydration.
For the mud that some trade effluent produces, there is a softening temperature in the principal solid material contained in mud, when heating makes temperature reach its softening temperature, solid matter molecule starts to soften, and wrap up other hydrophobic contaminant matter, occur automatically to shrink by effects such as Van der Waals force, hydrogen bond, intermolecular cohesions, molecule is made to combine closely, release is in conjunction with moisture, mud shrinks rapidly by convergent force poly-in self and internal moisture is squeezed out, can fast dewatering in conjunction with mechanical expression, form lump shape mud after cooling, realize deep dehydration.
Summary of the invention
The object of the present invention is to provide a kind of mud microwave heating continuously dehydrating method and device, realize the high-efficiency dehydration of mud, reduce sludge volume.
For achieving the above object, technological method of the present invention is:
A kind of mud microwave heating continuously dehydrating method, comprises the following steps:
Be delivered on dehydration strainer after the heat exchange of step a. thickened sludge, through Distribution of sludge plate by gravity predrainage after Distribution of sludge uniformly sludge blanket;
Step b. adopts microwave heating mud, makes mud be rapidly heated to 70-90 DEG C, mud is softened, shrinks;
Step c squeezing mud, makes sludge dewatering, deviates from water and thickened sludge heat exchange, preheating thickened sludge;
Steps d. to dehydration strainer water-spraying control, make mud lower surface temperature be cooled to less than 65 DEG C, continue dehydration to moisture percentage in sewage sludge and be reduced to less than 30%;
Step e. scrapes block mud on lower filter belt, deviates from water and enters Sewage treatment systems.
Described mud microwave heating continuously dehydrating device comprises sludge tank, sludge pump, sludge hot swap tank, microwave heating water extracter, heat exchange water pump.
Wherein said sludge tank is opened type right cylinder, inside establishes vertical stirrer, will enter sludge agitation even.
Between described sludge pump and sludge tank, connecting tube is set, between sludge pump outlet and sludge hot swap tank, connecting tube is set.
Described sludge hot swap tank inside is provided with heat exchanger tube, connecting tube is provided with between heat exchanger tube water inlet and heat exchange water pump, be provided with connecting tube between heat exchange water pump and microwave heating water extracter water leg, between heat exchanger tube water outlet and microwave heating water extracter cold water injection pipe, connecting tube is set.
Between Distribution of sludge pipe and sludge hot swap tank, connecting tube is set; Distribution of sludge pipe is positioned at directly over water extracter dehydration strainer, arranged transversely, mouth of pipe end closure; Distribution of sludge pipe bottom has row's diameter 1-3cm cloth mud hole, pitch of holes 2-4cm; The cloth mud hole extent of perforation distance dehydration each 15cm in strainer both sides.
Described microwave heating water extracter front end arranges Distribution of sludge plate, Distribution of sludge plate arranged transversely, and be positioned at directly over dehydration strainer, be highly 10-15cm, lower rim is parallel with strainer, and Distribution of sludge plate and below strainer spacing of dewatering is adjustable, and spacing is 2-8cm.
Described microwave heating water extracter top is microwave generator; Centre arranges dehydration strainer, arranges water leg immediately below strainer.
The microwave frequency that described microwave generator produces is 500MHz-1GHz, and microwave output power is that 0-50kW is adjustable;
It is 50-150cm that described microwave produces width, the distance dehydration each 5cm in strainer both sides.
Described dehydration strainer is closed circuit, and strainer material is porous synthetic fiber filter cloth.
Described dehydration strainer moves closed circulation by active drive roller strap, and running speed is adjustable, and middle by the support of 8-20 root supporting roll, supporting roll spacing is 30-50cm; Supporting roll is the stainless steel rider of 304 material, diameter 10-15cm.
Arrange squeeze roll directly over strainer, squeeze roll are 304 material stainless steels, diameter 40-80cm.
Arranged transversely cold water injection pipe below described dehydration strainer mud mouth end strainer, spray tube bore 40-80mm, in spray tube and sludge hot swap tank, heat exchanger tube water outlet arranges connecting tube; Cold water injection pipe latter end is closed, and top has row's diameter 4-8mm eyelet, eyelet spacing 40-60mm; Cold water injection pipe water coolant spray regime width is identical with sludge blanket width on strainer; Cold water injection pipe distance microwave heating region 1-3m; Eyelet is rule or Non-regular distribute; Control the water yield by eyelet diameter and eyelet number, make mud lower surface temperature be cooled to less than 65 DEG C.
Described water leg is positioned at below dehydration strainer, and water leg width is identical with strainer width, and length is identical with dehydration strainer drying zone length, collects water; Be provided with dividing plate in described water leg, bottom is provided with two water shoots, slope aspect water shoot bottom water leg, gradient 0.002-0.005; Between water leg hot water water shoot and heat exchange water pump, connecting tube is set.
Mud is delivered on dehydration strainer by sludge pump, through Distribution of sludge plate by gravity predrainage after Distribution of sludge uniformly sludge blanket, then enters microwave heating water extracter.
In microwave heating water extracter, mud heated by microwave, mud temperature reaches after more than 70 DEG C and starts to soften, and shrinks and assembles, and mud internal moisture is deviate from by mud hole by squeezing, falls into water leg through filter cloth.By water-spraying control after sludge dewatering, make base sludge surface cooling form lump shape, be beneficial to and strike off from filter cloth.Described water coolant is that the mud after exchanging with sludge hot deviates from water, for reducing mud lower surface temperature, mud is lowered the temperature and hardens.
A kind of mud microwave heating continuously dehydrating device and working method thereof, is characterized in that comprising the following steps:
Be delivered on dehydration strainer after the heat exchange of step a. thickened sludge, through Distribution of sludge plate by gravity predrainage after Distribution of sludge uniformly sludge blanket;
Step b. adopts microwave heating mud, makes mud be rapidly heated to 70-90 DEG C, mud is softened, shrinks;
Step c squeezing mud, makes sludge dewatering, deviates from water and thickened sludge heat exchange, preheating thickened sludge;
Steps d. to dehydration strainer water-spraying control, make mud lower surface temperature be cooled to less than 65 DEG C, continue dehydration to moisture percentage in sewage sludge and be reduced to less than 30%;
Step e. scrapes block mud on lower filter belt, deviates from water and enters Sewage treatment systems.
The present invention has following beneficial effect:
A. through present device and method process, sludge dewatering speed is fast, and dewatering efficiency is high, and after dehydration, the block moisture percentage in sewage sludge of formation is lower than 30%, far below conventional dehydration methods;
B. dewatered sludge compact structure, sludge volume is little, is convenient to transport and disposes;
C. dewatering of the present invention is specially adapted to content of wax mud and containing acrylic resin mud, as reclaimed mud, water color ink waste water acid out mud to wastewater from wax printing wax, does not need to add chemical agent in addition, making mud fast dewatering.
Accompanying drawing explanation
Fig. 1 is mud continuously dehydrating treatment system schematic diagram of the present invention.
Fig. 2 is sludge dewatering equipment vertical view.
Fig. 3 is sludge dewatering equipment sectional view.
Embodiment
With reference to Fig. 1, Fig. 2 and Fig. 3.
The invention provides a kind of mud microwave heating continuously dehydrating device, it comprises sludge tank 100, sludge pump 200, sludge hot swap tank 300, Distribution of sludge pipe 400, heat exchange water pump 500 and microwave heating water extracter 600 6 part composition.Wherein said sludge tank 100 is right cylinder, inside establishes vertical stirrer 700 for sludge agitation.
In sludge hot swap tank 300, snakelike heat exchanger tube is set.
Microwave heating water extracter 600 comprises Distribution of sludge plate 1, microwave generator 2, dehydration strainer 3, squeeze roll 4, water coolant spray tube 5, water leg 6, active drive roller 7, passive rotating roller 8, supporting roll 9, mud scraper 10, drive unit 11, bracing frame 12, heat insulation hood 13, water leg hot water water shoot 14, water leg cold water water shoot 15, frame 16.
In sludge tank 100, mud pumps into sludge hot swap tank 300 by sludge pump 200, heat exchange laggard enter microwave heating water extracter 600 dehydration strainer 3 on, after Distribution of sludge plate 1 distributes, use microwave heating mud, make mud temperature more than 70 DEG C, mud is softened, shrinks and assemble the hard-packed bulk of formation, after squeeze roll 4 press dewatering, with below water coolant spray tube 5 water-spraying control mud temperature to 65 DEG C, mud is scraped from strainer by mud scraper 10, dewatered sludge structure is in lump shape closely, and water ratio is lower than 30%.
Sludge hot swap tank 300 heat exchange water is that the mud of water leg hot water water shoot 14 discharge deviates from water, provides through heat exchange water pump 500.
The water outlet of water leg cold water water shoot 15 enters Sewage treatment systems.
A kind of mud microwave heating continuously dehydrating device provided by the invention and working method, mainly comprise the following steps:
In step a. sludge tank 100, thickened sludge is delivered on the dehydration strainer 3 of microwave heating water extracter 600 after pumping into sludge hot swap tank 300 heat exchange by sludge pump 200, through Distribution of sludge plate 1 by Distribution of sludge uniformly sludge blanket gravity predrainage;
Step b. adopts microwave generator 2 to heat mud, makes mud be rapidly heated to 70-90 DEG C, mud is softened, shrinks;
Step c utilizes squeeze roll 4 to squeeze mud, makes mud fast dewatering, deviates from water and discharges through water leg hot water water shoot 14, is delivered to sludge hot swap tank 300 carries out heat exchange, preheating thickened sludge with mud by heat exchange water pump 500;
Steps d. to dehydration strainer 3 water-spraying control, water coolant is deviate from water after exchanging with sludge hot, makes mud lower surface temperature be cooled to less than 65 DEG C, continues to dewater to moisture percentage in sewage sludge to be reduced to less than 30%;
Step e. scrapes block mud on lower filter belt by mud scraper 10, deviates from water and enters Sewage treatment systems by water leg cold water water shoot 15.
Actual processing effect shows: reclaim mud, water color ink waste water acid out mud for wastewater from wax printing wax, through apparatus of the present invention and method process, do not need additional chemical agent, after dehydration, the block moisture percentage in sewage sludge of formation is lower than 30%, far below press filtration or the Centrifugal dehydration method of routine.Dewatered sludge compact structure, sludge volume is little, be convenient to transport and process, and mud residual moisture is easy to remove, seasoning.
Claims (10)
1. a mud microwave heating continuously dehydrating method, comprises the following steps:
Be delivered on dehydration strainer after the heat exchange of step a. thickened sludge, through Distribution of sludge plate by gravity predrainage after Distribution of sludge uniformly sludge blanket;
Step b. microwave heating mud, makes mud be rapidly heated to 70-90 DEG C, mud is softened, shrinks;
Step c squeezing mud, makes sludge dewatering, deviates from water and thickened sludge heat exchange, preheating thickened sludge;
Steps d. to dehydration strainer water-spraying control, make mud lower surface temperature be cooled to less than 65 DEG C, continue dehydration to moisture percentage in sewage sludge and be reduced to less than 30%;
Step e. scrapes block mud on lower filter belt, deviates from water and enters Sewage treatment systems;
Described water coolant be with thickened sludge heat exchange after deviate from water.
2. a kind of mud microwave heating continuously dehydrating method according to claim 1, is characterized in that described mud dewatering method adopts microwave heating dehydration.
3. a mud microwave heating continuously dehydrating device, it comprises sludge tank, sludge pump, sludge hot swap tank, Distribution of sludge pipe, heat exchange water pump and microwave heating water extracter; Between sludge pump and sludge tank, connecting tube is set, between sludge pump outlet and sludge hot swap tank, connecting tube is set; Sludge hot swap tank inside arranges heat exchanger tube, between heat exchanger tube water inlet and heat exchange water pump, connecting tube is set, between heat exchange water pump and microwave heating water extracter water leg, connecting tube is set, between heat exchanger tube water outlet and microwave heating water extracter cold water injection pipe, connecting tube is set; Arrange connecting tube between Distribution of sludge pipe and sludge hot swap tank, Distribution of sludge pipe is positioned at above dehydration strainer; Described microwave heating water extracter front end arranges Distribution of sludge plate, and top is microwave generator, and centre arranges dehydration strainer, arranges water leg below strainer, and strainer arranges squeeze roll above rear end, arranges cold water injection pipe below strainer rear end.
4. a kind of mud microwave heating continuously dehydrating device as claimed in claim 3, is characterized in that described Distribution of sludge plate arranged transversely, and be positioned at directly over dehydration strainer, be highly 10-15cm, lower rim is parallel with strainer; Distribution of sludge plate is adjustable with dehydration strainer spacing, and spacing is 2-8cm.
5. a kind of mud microwave heating continuously dehydrating device as claimed in claim 3, it is characterized in that the microwave frequency that described microwave generator produces is 500MHz-1GHz, microwave output power is that 0-50kW is adjustable.
6. a kind of mud microwave heating continuously dehydrating device as claimed in claim 3, it is characterized in that described microwave produces width is 50-150cm, the distance dehydration each 5cm in strainer both sides.
7. a kind of mud microwave heating continuously dehydrating device as claimed in claim 3, it is characterized in that described dehydration strainer is closed circuit, running speed is adjustable.
8. a kind of mud microwave heating continuously dehydrating device as claimed in claim 3, is characterized in that arranging squeeze roll above described strainer rear end.
9. a kind of mud microwave heating continuously dehydrating device as claimed in claim 3, is characterized in that arranged transversely cold water injection pipe below described strainer rear end.
10. a kind of mud microwave heating continuously dehydrating device as claimed in claim 3, it is characterized in that described water leg is positioned at below dehydration strainer, water leg width is identical with strainer width, and length is identical with dehydration strainer drying zone length, arranges dividing plate in water leg.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410185371.1A CN105084698A (en) | 2014-05-05 | 2014-05-05 | Microwave-heating continuous dehydration method and apparatus for sludge |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410185371.1A CN105084698A (en) | 2014-05-05 | 2014-05-05 | Microwave-heating continuous dehydration method and apparatus for sludge |
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| CN105084698A true CN105084698A (en) | 2015-11-25 |
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| CN201410185371.1A Pending CN105084698A (en) | 2014-05-05 | 2014-05-05 | Microwave-heating continuous dehydration method and apparatus for sludge |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106186612A (en) * | 2016-08-31 | 2016-12-07 | 柳州市润广科技有限公司 | A kind of microwave method processes mud |
| CN109354377A (en) * | 2018-12-13 | 2019-02-19 | 青岛大学 | A kind of preprocess method of printing and dyeing sludge fast dewatering |
| CN109912170A (en) * | 2019-04-24 | 2019-06-21 | 杭州更蓝生物科技有限公司 | A kind of device for dehydrating sladge waste reducing energy consumption |
| CN109912168A (en) * | 2019-04-30 | 2019-06-21 | 杭州更蓝生物科技有限公司 | A kind of device for dehydrating sladge waste reducing cost |
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|---|---|---|---|---|
| CN1158750A (en) * | 1995-12-21 | 1997-09-10 | 潘尼维斯公司 | Device for filtering, washing and drying solid material-liquid mixture |
| CN101708944A (en) * | 2009-12-11 | 2010-05-19 | 天津泰达环保有限公司 | Sludge drying processing method and equipment |
| US20130161255A1 (en) * | 2011-12-21 | 2013-06-27 | General Electric Company | Microwave processing of wastewater sludge |
| CN103373801A (en) * | 2012-04-20 | 2013-10-30 | 青岛大学 | Continuous dehydrating method and device for explosive production wastewater and sludge |
-
2014
- 2014-05-05 CN CN201410185371.1A patent/CN105084698A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1158750A (en) * | 1995-12-21 | 1997-09-10 | 潘尼维斯公司 | Device for filtering, washing and drying solid material-liquid mixture |
| CN101708944A (en) * | 2009-12-11 | 2010-05-19 | 天津泰达环保有限公司 | Sludge drying processing method and equipment |
| US20130161255A1 (en) * | 2011-12-21 | 2013-06-27 | General Electric Company | Microwave processing of wastewater sludge |
| CN103373801A (en) * | 2012-04-20 | 2013-10-30 | 青岛大学 | Continuous dehydrating method and device for explosive production wastewater and sludge |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106186612A (en) * | 2016-08-31 | 2016-12-07 | 柳州市润广科技有限公司 | A kind of microwave method processes mud |
| CN109354377A (en) * | 2018-12-13 | 2019-02-19 | 青岛大学 | A kind of preprocess method of printing and dyeing sludge fast dewatering |
| CN109912170A (en) * | 2019-04-24 | 2019-06-21 | 杭州更蓝生物科技有限公司 | A kind of device for dehydrating sladge waste reducing energy consumption |
| CN109912168A (en) * | 2019-04-30 | 2019-06-21 | 杭州更蓝生物科技有限公司 | A kind of device for dehydrating sladge waste reducing cost |
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