CN104944735B - Dehydration and drying processing method and its sludge drying extruder in biological sludge factory - Google Patents
Dehydration and drying processing method and its sludge drying extruder in biological sludge factory Download PDFInfo
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- CN104944735B CN104944735B CN201510307148.4A CN201510307148A CN104944735B CN 104944735 B CN104944735 B CN 104944735B CN 201510307148 A CN201510307148 A CN 201510307148A CN 104944735 B CN104944735 B CN 104944735B
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Abstract
The present invention relates to a kind of biological sludge harmless processing method and equipment on the spot.Dehydration and drying processing method in a kind of biological sludge factory, including 1）Dewatering technology of mud, by biological sludge caused by processing sewage using sludge dewatering extruder to being allowed to carry out dewater treatment with the well-mixed dilute sludge for the treatment of agent by blender；2）Sludge drying process, the sludge after dehydration is first subjected to harmless treatment, then adds dewatered sludge control moisture content 48~52%, then using sludge drying extruder progress drying and other treatment.A kind of sludge drying extruder, including barrel casing, the barrel casing is interior to be provided with screw mechanism, and the screw mechanism includes hollow cylinder screw rod and spiral propeller；A kind of sludge dewatering extruder, including filtering barrel, screw mechanism is provided with the filtering barrel, the screw mechanism includes hollow cylinder screw rod and is arranged in the helical blade of the hollow cylinder screw rod outer rim, and longitudinally perpendicular hollow cylinder screw rod inlays 6~10 cleaning shoes between helical blade.
Description
Technical field
The present invention relates to a kind of biological sludge harmless processing method on the spot, more particularly, to being dehydrated in a kind of biological sludge factory
Drying method for treating, and realize the sludge drying extruder of this method.
Background technology
The sewage treatment works in China have unprecedented fast development in recent years, are completed operation sanitary sewage disposal
3622, factory, 1.53 hundred million tons of sewage of day processing, largely solves the crisis of China's water pollution, still, processing sewage production
Raw biological sludge has 80% not dealt carefully with, and biological sludge turns into sewage treatment plant's urgent problem to be solved.Biology
Contain a large amount of thalline and organic colloidal matter in sludge, cause the larger dehydration difficulty of sewage sludge viscosity, existing equipment can only incite somebody to action at present
Biological sludge dehydration to moisture content 80% or so, national health standard of landfill regulation dewatered sludge moisture content must not exceed 60%, take off
Sewage sludge must after-treatment reduction moisture content and innoxious sterilizing.Currently, it is in all parts of the country generally using construction treatment plant
The pattern of dewatered sludge is focused on, sludge dewatering expense is averaged 100 yuan/ton with freight is focused on, at sludge concentration
350-400 yuan/ton of 200 yuan/ton of the general counties and cities of reason expense, big city and developed area.The sewage disposal that China has gone into operation
Factory 90% belongs to middle-size and small-size apart from each other, and it is higher to focus on dewatered sludge freight, and it is huge to build the investment of dewatered sludge treatment plant
Greatly, normal handling expense remains high.The whole nation only has indivedual cities to be built with dewatered sludge treatment plant, most sewage at present
Treatment plant does not have dewatered sludge treatment facility, and disorderly phenomenon is commonplace for dewatered sludge, the place that dewatered sludge can not effectively, safe
There is great environmental potential safety hazard for reason.
The content of the invention
The present invention is directed to the deficiency of current biological sludge disposal technology, it is proposed that in a kind of biological sludge factory at dehydration and drying
The method and apparatus of reason, the method that machinery is taken using screw extruder principle, by biological sludge one in factory of sewage treatment plant
Secondary completion dewater treatment and drying and other treatment, moisture percentage in sewage sludge 25~55% after desiccation, can reach national health standard of landfill and money
Sourceization utilizes standard.
The technical solution adopted in the present invention：
Dehydration and drying processing method in a kind of biological sludge factory, is realized to biological sludge on the spot in factory of sewage treatment plant
Harmless treatment, its process realized include dewatering technology of mud and sludge drying process：
1）The dewatering technology of mud, biological sludge caused by processing sewage is added into a certain proportion for the treatment of agent, adopted
With sludge dewatering extruder to being allowed to carry out dewater treatment with the well-mixed dilute sludge for the treatment of agent by blender, after dehydration
Moisture percentage in sewage sludge 70~75%；
2）The sludge drying process, the sludge after dehydration is first added into a certain proportion of disinfection sanitizer and stirred nothing
Evilization processing, then moisture content 48~52% after a certain proportion of dewatered sludge stirs is added, using sludge drying extruder pair
Sludge after stirring carries out drying and other treatment, and the sludge after desiccation dries moisture content below 30% by cooling.
Dehydration and drying processing method in described biological sludge factory, the disinfection sanitizer added in mud drying process, is adopted
With chlorine dioxide, potassium ferrate environment-friendly type disinfection sanitizer.
Dehydration and drying processing method in described biological sludge factory, the biological sludge after dehydration need sanitary landfills to dispose,
Only need sterilizing and addition dewatered sludge, sanitary landfills moisture percentage in sewage sludge 48~52%.
One kind realizes sludge drying extruder used in dehydration and drying processing method in the biological sludge factory, including machine
Frame, barrel casing, the barrel casing are fixedly installed in frame, and screw mechanism, the spiral are provided with the barrel casing
Mechanism includes hollow cylinder screw rod and spiral propeller, and the barrel casing of the hollow cylinder screw rod tail end is provided with charging aperture, hollow
The front ends of the barrel casing of cylinder screw front end cover circumference corresponding with the helical blade installation site of spiral propeller and are provided with
Dewatered sludge discharging opening, the screw mechanism passes through aft end axle during use and actuating unit couples.
Described sludge drying extruder, the spiral propeller set on screw mechanism is using 8~12 sets interruption settings, often
Set spiral propeller is provided with 3~5 helical blades, and the vertical tilt angle between helical blade and the hollow cylinder screw rod is 55
~65 degree.
Described sludge drying extruder, helical blade outer and 0.6~0.8mm of gap of barrel casing inner wall.
Described sludge drying extruder, heater is provided with barrel casing periphery, the heater uses
Electromagnetic induction heating mechanism, coordinate with the heater and be provided with temperature sensor and temperature-adjusting device.
It is a kind of realize described in biological sludge factory in sludge dewatering extruder used in dehydration and drying processing method, including
Frame and filtering barrel, the filtering barrel are fixedly installed in frame, and screw mechanism, the spiral shell are provided with the filtering barrel
Rotation mechanism includes hollow cylinder screw rod and is arranged in the helical blade of the hollow cylinder screw rod outer rim, longitudinally perpendicular between helical blade
Hollow cylinder screw rod inlays 6~10 cleaning shoes, and the top of the cleaning shoe is less than helical blade outer, and the height of cleaning shoe is little
In the 50% of helical blade height, the filtering barrel of the hollow cylinder screw rod tail end is provided with charging aperture, hollow cylinder screw front end,
The anterior end cap circumference corresponding with helical blade installation site of filtering barrel is provided with dewatered sludge discharging opening, and discharging opening is provided with
Discharge adjusting means, and the screw mechanism passes through aft end axle during use and actuating unit couples.
Described sludge dewatering extruder, cleaning shoe top are provided with wear resistant nylon hairbrush, the brush of the wear resistant nylon hairbrush
Hair highly 7~10mm, 4~5mm of bristle thickness, the bristle of the wear resistant nylon hairbrush are higher by 2~5mm of helical blade outer.
Described sludge dewatering extruder, filtering barrel are formed using multilayer stainless steel strand composite welding, internal layer strand
Gap is not more than 0.15mm；Filtering barrel is divided into several sections of welding, and then every section of two welded flange is assembled with bolt, described
Sewage collecting cylinder is provided with outside filtering barrel, the sewage collecting cylinder bottom is provided with sewage outlet.
Beneficial effects of the present invention：
1. present invention harmless treatment dewatered sludge on the spot in factory of sewage treatment plant, avoid transporting outward strange land processing and cause two
It is secondary to pollute and save huge freight.
2. present invention processing dewatered sludge construction investment per ton is the 20-30% for building the investment of dewatered sludge treatment plant, can profit
With the existing factory building place of sewage treatment plant, huge investment expense is saved.
3. the present invention processing daily running cost of dewatered sludge saves huge dehydration dirt less than 50 yuan/ton, than prior art
Mud processing cost.
4. the present invention adapts to the size sewage treatment plant of any scale, Industrial Waste Water Treatments factory, waterworks are also applicable.
5. sludge dewatering extruder treatment effeciency of the present invention is high, treatment agent dosage is few, processing moisture percentage in sewage sludge is low, sets
Standby maintenance cost is low, is existing device for dehydrating sladge waste upgraded product.
6. 《Ten, water》Just promulgate that country increases the improvement of sewage treatment plant's dewatered sludge, existing sewage treatment plant is all
Increase dewatered sludge processing equipment in upgrading, the present invention will produce positive role.
Brief description of the drawings
Fig. 1 is sludge drying extruder structure schematic diagram of the present invention；
Fig. 2 is the cross section structure diagram of sludge drying extruder of the present invention；
Fig. 3 is the structural representation of sludge dewatering extruder of the present invention.
Embodiment
Below by embodiment, technical scheme is described in further detail.
Embodiment 1
Dehydration and drying processing method in biological sludge factory of the present invention, realized on the spot in factory of sewage treatment plant to biological dirty
The harmless treatment of mud, its process realized include dewatering technology of mud and sludge drying process：
1）The dewatering technology of mud, biological sludge caused by processing sewage is added into a certain proportion for the treatment of agent, adopted
With sludge dewatering extruder to being allowed to carry out dewater treatment with the well-mixed dilute sludge for the treatment of agent by blender, after dehydration
Moisture percentage in sewage sludge 70~75%；
2）The sludge drying process, the sludge after dehydration is first added into a certain proportion of disinfection sanitizer and stirred nothing
Evilization processing, then moisture content 48~52% after a certain proportion of dewatered sludge stirs is added, using sludge drying extruder pair
Sludge after stirring carries out drying and other treatment, and the sludge after desiccation dries moisture content below 30% by cooling.
Dehydration and drying processing method in described biological sludge factory, the disinfection sanitizer added in mud drying process, is adopted
With chlorine dioxide, potassium ferrate environment-friendly type disinfection sanitizer.
Dehydration and drying processing method in described biological sludge factory, the biological sludge after dehydration need sanitary landfills to dispose,
Only need sterilizing and addition dewatered sludge, sanitary landfills moisture percentage in sewage sludge 48-52%.
Embodiment 2
Dehydration and drying processing method in the biological sludge factory of the present embodiment, dewatering technology of mud are as follows：
Biological sludge caused by sewage treatment plant's processing sewage, precipitates moisture content 99% or so by mudpan, uses spiral shell
Bar pump extracts dilute sludge from sedimentation basin bottom out, and conveyance conduit is provided with treatment agent import and blender, quantified with measuring pump
A certain proportion of processing sludge medicament is added, blender makes dilute sludge be sufficiently mixed with medicament, fed from sludge dewatering extruder
Mouth enters in filtering barrel；Screw pump and drug metering pump can adjust inlet amount equipped with variable speed electric motors, particularly, make dilute sludge and place
Reason medicament reaches best fit state.10~40 revs/min of sludge dewatering extruder rotating speed, motor gear box device drive screw rod to turn
Dynamic, the helical blade on screw rod drives sludge to push ahead, and sludge is extruded in barrel is filtered by intensity, and moisture is from filtering
Extruded in the silk seam of barrel, the moisture of extrusion is collected by sewage collecting cylinder, and flowing into sewer from outlet of sewer is back to sewage plant
Processing pond.Sludge water content is squeezed the sludge concentration increase for filtering barrel inner surface of sening as an envoy to, and the sludge of surface higher concentration blocks
The sludge that filtering barrel silk seam also blocks the inside low concentration squeezes the water out, and significantly impacts sludge dewatering efficiency；Cleaning shoe
With screw rod synchronous axial system, filtering barrel inner surface can scratch 4~8 times/second, wipe the dirt of filtering barrel surface higher concentration off
Mud makes the sludge of the inside low concentration be extruded moisture close to surface；Hairbrush at the top of cleaning shoe can also remove filtering barrel silk seam
In debris, make silk seam keep it is unimpeded.Screw feed one end is less and less to the capacity between discharging one end pitch, filters barrel
In the moisture that is extruded of sludge it is also more and more, finally extruded from head discharging opening；Discharging adjusting means regulation on head
The moisture content of discharging sludge, moisture content 70-75% after sludge dewatering.Dewatered sludge falls into spiral from dewatering extruder head extrusion
In shaftless sludge conveyer hopper, dewatered sludge is transported in storage mud box by conveyer.
Sludge drying process is as follows：
Horizontal sludge stirring machine is following installed in dewatered sludge storage mud box, and opening gate dewatered sludge, which automatically flows into, to be stirred
Mix in machine, dewatered sludge first is added into a certain proportion of disinfection sanitizer stirs harmless treatment, then uses small sized loader
A certain proportion of scattered dewatered sludge moisture of dewatered sludge absorption is added, moisture percentage in sewage sludge 48-52% is put into storage mud after stirring
Pond.Sludge after stirring is transported in sludge drying extruder feed hopper with conveyer from storage basin, sludge enters from charging aperture
Enter in barrel, screw rod quick rotation under the drive of motor gear box device, the spiral propeller on screw rod makes sludge have in barrel
A plurality of transfer passage, enter two and move back one can not arrhea, sludge is extruded in any moisture content state, thoroughly solve High water cut
Rate sludge adhesion screw rod squeezes the problem not discharged.90~100 revs/min of sludge drying extruder rotating speed, spiral propeller is very
Good frictional heat device, screw rod at a high speed rotation sludge frictional heat and additional inductance heating device make sludge be warming up to 80~
100 degree.Sheet high temperature sludge is extruded from desiccation chain-drive section discharging opening, is fallen into ribbon conveyer and is transported in loading machine bucket, is loaded
Sludge is transported to cool in transparent watt of greenhouse of steel construction top plastic and dried by machine, and drying moisture content by cooling in 2~3 days is down to
Less than 30% turns into dewatered sludge.Dewatered sludge backflow is added in dewatered sludge, reduces dewatered sludge moisture content and viscosity is easy to
Drying and other treatment, organic fertilizer kind seeds of flowering plants tree or improved soil can also be used as, or be used as replacement of fuel part coal.Dewatered sludge needs
Sanitary landfills is wanted to dispose, it is only necessary to which harmless treatment and addition dewatered sludge can reach the directly outward transport of sanitary landfills standard and filled out
Bury；Only need the partially dehydrated sludge of drying and other treatment to meet backflow usage amount daily, summer can store some dewatered sludges in case
Winter or successive cloudy days use.
Embodiment 3
Dehydration and drying processing method in the biological sludge factory of the present embodiment, dewatered sludge handling process are as follows：
Horizontal sludge stirring machine is following installed in dewatered sludge storage mud box, and opening gate dewatered sludge, which automatically flows into, to be stirred
Mix in machine, dewatered sludge first is added into a certain proportion of disinfection sanitizer stirs harmless treatment, then uses small sized loader
A certain proportion of scattered dewatered sludge moisture of dewatered sludge absorption is added, moisture percentage in sewage sludge 48-52% is put into storage mud after stirring
Pond.Sludge after stirring is transported in sludge drying extruder feed hopper with conveyer from storage basin, sludge enters from charging aperture
Enter in barrel, screw rod quick rotation under the drive of motor gear box device, the spiral propeller on screw rod makes sludge have in barrel
A plurality of transfer passage, enter two and move back one can not arrhea, sludge is extruded in any moisture content state, thoroughly solve High water cut
Rate sludge adhesion screw rod squeezes the problem not discharged.90~100 revs/min of sludge drying extruder rotating speed, spiral propeller is very
Good frictional heat device, screw rod at a high speed rotation sludge frictional heat and additional inductance heating device make sludge be warming up to 80~
100 degree.Sheet high temperature sludge is extruded from desiccation chain-drive section discharging opening, is fallen into ribbon conveyer and is transported in loading machine bucket, is loaded
Sludge is transported to cool in transparent watt of greenhouse of steel construction top plastic and dried by machine, and drying moisture content by cooling in 2~3 days is down to
Less than 30%.Existing sewage treatment plant is equipped with dilute device for dehydrating sladge waste, because past dewatered sludge factory calibration and environmental protection will
Ask not high and improve the necessary secondary place of dewatered sludge without supporting dewatered sludge processing equipment, present factory calibration and environmental requirement
Reason.Dewatered sludge drying and other treatment equipment and handling process can be provided separately in the present invention, make to complete in existing factory of sewage treatment plant
The harmless treatment of dewatered sludge and drying and other treatment, no longer dewatered sludge is transported to strange land and handled.
Embodiment 4
Referring to Fig. 1, Fig. 2, the present embodiment is to realize dirt used in dehydration and drying processing method in aforementioned biological sludge factory
Mud desiccation extruder, including frame 11, barrel casing 3, the barrel casing 3 are fixedly installed in frame 11, the barrel machine
Screw mechanism is provided with shell 3, the screw mechanism includes hollow cylinder screw rod 1 and spiral propeller 2, the tail end of hollow cylinder screw rod 1
Barrel casing 3 is provided with charging aperture 5, on the anterior end cap 7 of the barrel casing of the front end of hollow cylinder screw rod 1 with spiral propeller 2
Circumference corresponding to helical blade installation site is provided with dewatered sludge discharging opening 8, and the screw mechanism passes through aft end axle during use
Couple with actuating unit.
Embodiment 5
Referring to Fig. 1, Fig. 2, the sludge drying extruder of the present embodiment, as different from Example 4：On the screw mechanism
The spiral propeller 2 of setting is set using 8~12 sets of interruptions, is often covered spiral propeller 2 and is provided with 3~5 helical blades, the spiral shell
Vertical tilt angle between vane piece and hollow cylinder screw rod 1 is 55~65 degree.
Described sludge drying extruder, helical blade outer and 0.6~0.8mm of gap of the inwall of barrel casing 3.
The sludge drying extruder of the present invention, heater 4, the heater 4 are provided with the periphery of barrel casing 3
Using electromagnetic induction heating mechanism, coordinate with the heater 4 and be provided with temperature sensor and temperature-adjusting device.
Label 6 is feed hopper in figure, and 9 be speed changer, and 10 be motor.
Embodiment 6
Referring to Fig. 3, the present embodiment is to realize that sludge used in dehydration and drying processing method takes off in aforementioned biological sludge factory
Water extruder, including frame 12 and filtering barrel 3, the filtering barrel 3 are fixedly installed in frame 12, the filtering barrel 3
Interior to be provided with screw mechanism, the screw mechanism includes hollow cylinder screw rod 1 and is arranged in the helical-blade of the outer rim of hollow cylinder screw rod 1
Piece, longitudinally perpendicular hollow cylinder screw rod inlays 6-10 bars cleaning shoe 2 between helical blade, and the top of the cleaning shoe 2 is less than spiral
Blade outer, the height of cleaning shoe 2 are not more than the 50% of helical blade height, the filtering barrel 3 of the tail end of hollow cylinder screw rod 1
It is provided with charging aperture 5, the front end of hollow cylinder screw rod 1, the circumference corresponding with helical blade installation site of anterior end cap 6 for filtering barrel
Provided with dewatered sludge discharging opening 7, discharging opening 7 is provided with discharging adjusting means 8, during use the screw mechanism by aft end axle and
Actuating unit couples.
Embodiment 7
Referring to Fig. 3, the sludge dewatering extruder of the present embodiment, as different from Example 6：The top of cleaning shoe 2 is provided with resistance to
Grind nylon bristle, the wear resistant nylon hairbrush bristle height 7~10mm, 4~5mm of bristle thickness, the wear resistant nylon hairbrush
Bristle be higher by 2~5mm of helical blade outer.
Embodiment 8
Referring to Fig. 3, the sludge dewatering extruder of the present embodiment, unlike embodiment 6 or embodiment 7：Filter barrel 3
Formed using multilayer stainless steel strand composite welding, internal layer strand gap is not more than 0.15mm（Only sewage is allowed to pass through）；Filtering
Barrel is divided into several sections of welding, then every section of two welded flange is assembled with bolt, and sewage is provided with outside the filtering barrel
Surge drum 4, the bottom of sewage collecting cylinder 4 are provided with sewage outlet 9.
Label 10 is speed changer in figure, and 11 be motor.
Claims (5)
1. dehydration and drying processing method in a kind of biological sludge factory, realize the nothing to biological sludge on the spot in factory of sewage treatment plant
Evilization processing, its process realized include dewatering technology of mud and sludge drying process, it is characterized in that：
1）The dewatering technology of mud, sewage treatment plant is handled into biological sludge caused by sewage and adds a certain proportion of processing medicine
Agent, dilute sludge is sufficiently mixed with medicament using blender, well-mixed dilute sludge is carried out using sludge dewatering extruder
Dewater treatment, 10~40 revs/min of sludge dewatering extruder rotating speed；Motor gear box device drives screw rod to rotate, the spiral shell on screw rod
Vane piece drives sludge to push ahead, and sludge is extruded in barrel is filtered by intensity, and moisture is from the silk seam of filtering barrel
Extrusion, the moisture of extrusion are collected by sewage collecting cylinder, and flowing into sewer from outlet of sewer is back to sewage plant processing pond；Screw rod enters
Expect that one end is less and less to the capacity between discharging one end pitch, the moisture that the sludge in filtering barrel is extruded is more and more,
Finally extruded from head discharging opening；The moisture content of discharging adjusting means regulation discharging sludge on head, it is aqueous after sludge dewatering
Rate 70-75%；Dewatered sludge is fallen into the shaftless sludge conveyer hopper of spiral from dewatering extruder head extrusion, and conveyer will be de-
Sewage sludge is transported in storage mud box；
2）The sludge drying process, horizontal sludge stirring machine is following installed in dewatered sludge storage mud box, open gate dehydration
Sludge is automatically flowed into mixer, and dewatered sludge first is added into a certain proportion of disinfection sanitizer stirs innoxious place
Reason, then add a certain proportion of dewatered sludge with small sized loader and adsorb scattered dewatered sludge moisture, sludge contains after stirring
Water rate 48-52% is put into storage basin；Sludge after stirring is transported to sludge drying extruder feed hopper with conveyer from storage basin
In, sludge enters in barrel from charging aperture, screw rod quick rotation under the drive of motor gear box device, the spiral propeller on screw rod
Sludge is had a plurality of transfer passage in barrel, enter two and move back one can not arrhea, sludge is not pasted axis and smoothly extrude；Sludge is done
Change 90~100 revs/min of extruder rotating speed, spiral propeller is good frictional heat device, and rotation sludge rubs screw rod at a high speed
Wiping heat and additional inductance heating device makes sludge be warming up to 80~100 degree；
Sheet high temperature sludge is extruded from desiccation chain-drive section discharging opening, is fallen into ribbon conveyer and is transported in loading machine bucket, loading machine
Sludge is transported in transparent watt of greenhouse of steel construction top plastic to cool and dried, drying moisture content by cooling in 2~3 days is down to
Less than 30% turns into dewatered sludge, and dewatered sludge backflow in part is added in dewatered sludge, to reduce dewatered sludge moisture content and glue
Degree is easy to drying and other treatment, remaining dewatered sludge sanitary landfills disposal, or is used as organic fertilizer kind seeds of flowering plants tree or improved soil, or is used as
Replacement of fuel part coal.
2. dehydration and drying processing method in biological sludge factory according to claim 1, it is characterised in that：Mud drying process
The disinfection sanitizer of middle addition, using chlorine dioxide, potassium ferrate environment-friendly type disinfection sanitizer.
3. sludge drying used in dehydration and drying processing method is extruded in a kind of biological sludge factory realized described in claim 1
Machine, including frame（11）, barrel casing（3）, the barrel casing（3）It is fixedly installed in frame（11）On, the barrel casing
（3）It is interior to be provided with screw mechanism, it is characterised in that：The screw mechanism includes hollow cylinder screw rod（1）And spiral propeller（2）, institute
State hollow cylinder screw rod（1）The barrel casing of tail end（3）It is provided with charging aperture（5）, hollow cylinder screw rod（1）The barrel casing of front end
Anterior end cap（7）Upper and spiral propeller（2）Helical blade installation site corresponding to circumference be provided with dewatered sludge discharging opening
（8）, the screw mechanism passes through aft end axle during use and actuating unit couples；The screw propulsion set on the screw mechanism
Device is set using 8~12 sets of interruptions, is often covered spiral propeller and is provided with 3~5 helical blades, the helical blade and hollow cylinder spiral shell
Bar（1）Between vertical tilt angle be 55~65 degree.
4. sludge drying extruder according to claim 3, it is characterised in that：The helical blade outer and barrel casing
（3）0.6~0.8mm of gap of inwall.
5. the sludge drying extruder according to claim 3 or 4, it is characterised in that：In the barrel casing（3）Periphery is set
There is heater（4）, the heater（4）Using electromagnetic induction heating mechanism, with the heater（4）Coordinate and be provided with temperature
Spend sensor and temperature-adjusting device.
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| CN201284282Y (en) * | 2008-06-10 | 2009-08-05 | 丹东北方环保工程有限公司 | Spiral type two-stage sludge dewatering machine |
| CN101838096A (en) * | 2010-02-11 | 2010-09-22 | 浙江科力尔环保设备有限公司 | Sludge helix extrusion device in sewage treatment |
| CN102267795A (en) * | 2011-06-17 | 2011-12-07 | 中国科学院武汉岩土力学研究所 | Dewatered sludge drying method of wastewater treatment plant |
| CN202246357U (en) * | 2011-06-21 | 2012-05-30 | 江苏牧羊集团有限公司 | Steam spiral sludge dewatering machine |
| CN202705209U (en) * | 2012-08-13 | 2013-01-30 | 柳建国 | Screw extrusion type sludge deep dewatering granulator |
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