CN105271629A - Dehydration and desiccation device and method for sewage sludge - Google Patents
Dehydration and desiccation device and method for sewage sludge Download PDFInfo
- Publication number
- CN105271629A CN105271629A CN201510749745.2A CN201510749745A CN105271629A CN 105271629 A CN105271629 A CN 105271629A CN 201510749745 A CN201510749745 A CN 201510749745A CN 105271629 A CN105271629 A CN 105271629A
- Authority
- CN
- China
- Prior art keywords
- mud
- sludge
- dehydration
- drying
- equipment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention relates to a dehydration and desiccation device and method for sewage sludge. The device comprises a wet sewage sludge storage and delivery system, a sludge dehydration system and a sludge desiccation system which are communicated through closed type pipelines and used for delivering, storing and modifying sludge, dehydrating the sludge and desiccating the sludge into grains respectively, wherein the sludge dehydration system comprises high pressure elastic press filtering equipment at a minimum so that working pressure of a filter press can be raised; the sludge desiccation system comprises horizontal type disc desiccation equipment at a minimum so that the sludge obtained after modification and dehydration can be desiccated. The dehydration and desiccation device is applicable to treatment and disposal of sludge of different water contents, and the sludge from different sewage treatment plants can all be treatment through the process. The sludge is sent into a sludge bin in the mode of vehicle carrying and transportation and then delivered through a pump and the pipelines, environmental pollution caused by delivery of the sludge is not caused, and environmental sanitation is good.
Description
Technical field
The present invention relates to sewage sludge process field, the present invention relates to a kind of dehydration and drying device and method for the treatment of of town sewage and sludge, be applicable to the process of urban wastewater treatment firm mud, be equally applicable to natural pond Slag treatment etc. after the organic waste anaerobic digestion of cities and towns.
Background technology
The requirement including sludge stabilizing, minimizing, innoxious and resource utilization is disposed in treatment of town sewage and sludge process; The minimizing of mud is the core link of sludge treatment, and major objective reduces the moisture in mud; The method of sludge reduction comprises mechanical dehydration method, heat drying method etc.; In the process of specific resistance to filtration, there is the array mode of kinds of processes.
Mechanical dehydration method comprises chamber-type press filter, diaphragm filter press, belt filter press etc., wherein based on diaphragm filter press and belt filter press, because sewage sludge viscosity after biochemical treatment is higher, and moisture percentage in sewage sludge about 80% after conventional press filtration; Heat drying method comprises direct heat drying and indirect thermal mummification; Direct heat drying adopts industrial furnace smoke directly to contact usually, thermal convection heat exchange; Indirectly drying is by heating agent (steam or thermal oil) indirect contact; Oven drying method by sewage mummification to 10-40% water ratio, and can provide condition for the innoxious of mud and resource utilization; The direct heat drying of mud generally needs the flue gas utilizing Industrial Stoves, and exhaust gas volumn is comparatively large, and the resource limit by ambient conditions is comparatively large, and the flue gas after direct heat exchange is often containing a certain amount of smelly property gas, and deodorizing difficulty is larger; Mud indirect thermal mummification hear rate is higher, and mud 80% water ratio is reduced to the saturated vapor (0.5Mpa, 153 DEG C) that 40% water ratio generally need consume about 0.8-1t, and actual motion costly;
Disclose a kind of sludge drying system in prior art, it is characterized in that between sludge dewatering and heat drying, being provided with mud granulizing equipment, but mud granulizing process often produces more dust and latch up phenomenon, the stability of influential system.
Also disclose a kind of complete steam low-temperature thermally hardening, tempering and drying device and method of mud in prior art, it adopts steam heating agent as modified means.
A kind of dehydration and drying processing method and device is also disclosed in prior art, it is characterized in that adopting hollow blade to rotate indirect dryer, in mummification mode, the finished product mud of 85% is sent into finished product district by hollow indirect rotary dryer, the mud of 15% turns back to pre-mummification district by helical screw feeder, and the drying process of mud needs " back-mixing ".
The method for sludge treatment of a kind of powerful dehydration and low temperature mummification combination is also disclosed in prior art, it is characterized in that the flue gas of 130-220 DEG C heat power plant or cement mill got rid of, by airdoor control exhaust gas volumn, sent in rotary type sludge mummification granulating apparatus by induced draft fan, carry out the process of mummification or granulating.
Along with the raising of sewage work's treatment scale and treating depth, sludge yield constantly increases year by year; Original specific resistance to filtration equipment and method can not meet sludge disposal demand, the following aspect of main manifestations:
1, filter press technique is not enough to sludge reduction degree: after filter press technique dehydration, water ratio is generally about 80%, and sludge reduction degree is inadequate, and dehydrated sludge volume is still huge, is not easy to ultimate disposal; Middle pressure barrier film press filtration (operating pressure 15-18bar) press filtration can reduce moisture percentage in sewage sludge to 60%, but needs to increase more amendment (conditioning amount 30-50%/tDS), and the mud after conditioning finally can only enter landfill yard and dispose;
2, often have two or more urban wastewater treatment firm in urban region, each sludge of sewage treatment plant dewatering type and dehydrating effect there are differences; Sludge treatment factory demand fulfillment is concentrated to carry out mud polynary, the requirement that water-cut variation is larger;
3, directly oven drying method needs a large amount of heat smoke, and the heat smoke process directly after contact is containing frowziness, and intractability is larger;
4, indirect drying method generally adopts steam as heating agent, and mummification one ton of mud needs 0.8-1.0t steam (0.6Mpa, 160 DEG C) usually, and processing cost is higher.
Summary of the invention
In summary of the invention part, introduce the concept of a series of reduced form, this will further describe in embodiment part.Summary of the invention part of the present invention does not also mean that the key feature and essential features that will attempt to limit technical scheme required for protection, does not more mean that the protection domain attempting to determine technical scheme required for protection.
In order to solve problems of the prior art, provide a kind of dehydration and drying device of sewage sludge, comprise: by the wet mud storing/conveying system of the pipeline connection of closed, sludge dewatering system and sludge drying system, to be respectively used to, to described mud conveying, storage, modification, dewater to described mud and carry out mummification granulating to described mud;
Wherein, described sludge dewatering system at least comprises high-pressure elastomeric filtering equipment, to improve the operating pressure of pressure filter;
Described sludge drying system at least comprises horizontal disc drying equipment, with by the described sludge drying after modifying and dewatering.
Alternatively, described high-pressure elastomeric filtering equipment comprises matching board and is positioned at the high filter press plate above described matching board, and wherein, described matching board is connected by spring with described high filter press plate.
Alternatively, described high-pressure elastomeric filtering equipment also comprises the filter cloth be set on described matching board and described high filter press plate further.
Alternatively, described horizontal disc drying equipment comprises cylindrical shell and is positioned at the main shaft of described cylindrical shell, and described main shaft comprises quill shaft and the hollow disk with described quill shaft gas communication, and wherein, described quill shaft is communicated with steam-heating apparatus.
Alternatively, the outer rim of described hollow disk is provided with arc plate, described arc plate comprises pitched blade and/or horizontal paddle, for advancing and/or stirring described mud.
Alternatively, described wet mud storing/conveying system comprises the mud storage conveying device, modified tempering tank and the mud buffer tank that are communicated with successively, for accepting mud and described mud being carried out modification.
Alternatively, slope conveyor and buffer bin is also provided with between described sludge dewatering system and described sludge drying system.
Alternatively, described sludge drying system is also connected with fly-ash separator and/or condenser and/or biological deodorizing device.
Present invention also offers a kind of dehydration and drying method based on said apparatus, comprising:
Step S1: mud is delivered to described wet mud storing/conveying system, to carry described mud, to store, modification;
Step S2: modified described mud is delivered to described sludge dewatering system, by repeatedly charging repeatedly press filtration in described high-pressure elastomeric filtering equipment, removes the water in described mud;
Step S3: the mud after the press filtration of described high-pressure elastomeric filtering equipment enters described sludge drying system, carries out dry granulating to the mud after dehydration in described horizontal disc drying equipment.
Alternatively, described in described step S2, the feed time of mud is 10-25min, and the reserved dwell time; The time of filter pressing of described mud is 75-90min.
Alternatively, carry out twice charging, twice press filtration in described step S2, to press filtration, moisture percentage in sewage sludge is 55-65%.
Alternatively, described mud in described step S3 after press filtration enters in described horizontal disc drying equipment, thermal medium is passed in quill shaft and hollow disk, described mud and described hollow disk carry out heat exchange, and advanced by mud described in the rotation forces of described quill shaft, mud described in last mummification granulation.
Alternatively, in described step S1, add the 15-20% properties-correcting agent based on mud butt amount at described mud, and whip modified is no less than 45min.
Alternatively, after described step S3, also comprise the step of the tail gas of described horizontal disc drying equipment discharge being carried out to dedusting and/or condensation and/or deodorizing further.
The present invention compared with prior art has significant beneficial effect:
1, optimization design of the present invention mud stores and delivery system, can centrally dispose external mud (water ratio 70-80%), by the pipeline pumping mode of closed, ensure that on-the-spot environmental health.
2, the present invention adopts high-pressure elastomeric filtering equipment, improves the operating pressure of pressure filter and optimizes the sequence of operation of squeeze section, simplifies system flow and reduces additive amount of medicament.
3, the present invention adopts horizontal disc drying equipment, preferably adopts steam as heating agent, below the sludge drying to 40% after modifying and dewatering, does not need mud " back-mixing " or " granulation ".
4, dehydration and drying equipment organically combine by the present invention, utilize mechanical energy and heat energy, reduce the working cost of sludge treatment according to dehydration difficulty gradient.
Device of the present invention and described method have the following advantages:
1, the present invention is applicable to process and disposes the mud of different water cut, from the mud of different sewage treatment plant all by this art breading.
2, mud is sent in sludge storage bin by the mode of vehicle-mounted transport, and then by pump and Pipeline transport, do not produce because mud has bad luck the environmental pollution of generation, environmental health is good.
3, meet the requirement of different town sewage plant moisture percentage in sewage sludge change, adaptable, stability is high, and processing costs is lower.
4, mud is by modification conditioning system, and the sludge agitation time is no less than 45min, improves sludge press filtration performance, by changing sheet frame material, sets up spring device, improves the pressure between filter plate, makes pressure energy bring up to 30-50bar; By optimizing sewage sludge feed and press filtration sequence of operation, improve dewatering performance of sludge; Properties-correcting agent preferably adopts lime, flyash system coarse aggregate reagent, and lime-crushed stone pile is about mud butt amount 15-20%, compares in tradition and presses barrier film sheet frame to reduce by 1/2; After the press filtration of high-pressure elastomeric filtering equipment, mud is carried by shaftless screw, avoids leakage and the environmental pollution of material.
5, preferably adopt horizontal disc drying equipment, by arranging inclination blade and horizontal blade bears stirring prograding, improve disk antiwear property, being specially adapted to the sewage sludge of Gao Hansha.Disc type drying equipment is energy-efficient equipment, and the consumption of steam is about 0.4-0.45t/t mud, is about conventional heat drying technique 1/2; In addition disc type sludge drying process system negative pressure is run, and stenchless escaping, environmental health is controlled well.
6, after high pressure press filtration and mummification, the water ratio of mud is reduced to less than 40%, is generally 30-40%; Due to less at treating processes Chinese medicine addition, the change of mud dry base heat value is little, is convenient to final at power plant or garbage power plant incineration disposal.
Accompanying drawing explanation
Following accompanying drawing of the present invention in this as a part of the present invention for understanding the present invention.Shown in the drawings of embodiments of the invention and description thereof, be used for explaining device of the present invention and principle.In the accompanying drawings,
Fig. 1 is operational path and the device schematic diagram that in the present invention, a kind of brand-new treatment of town sewage and sludge focuses on disposal;
Fig. 2 is the structural representation of mesohigh elasticity filtering equipment of the present invention;
Fig. 3 is the structural representation of mesohigh elasticity filtering equipment of the present invention;
Fig. 4 is the structural representation of disk drying equipment in the present invention.
Accompanying drawing identifies
1, mud storage conveying device 2, modifier hopper
3, properties-correcting agent handling equipment 4, modification modulator tube
5, modulated sludge buffer tank 6, sludge pump
7, high-pressure elastomeric filtering equipment 8, slope conveyor
9, buffer memory feed bin 10, disc type drying equipment
11, with fly-ash separator 12, condenser
13, biological deodorizing device
Embodiment
In the following description, a large amount of concrete details is given to provide more thorough understanding of the invention.But, it is obvious to the skilled person that the present invention can be implemented without the need to these details one or more.In other example, in order to avoid obscuring with the present invention, technical characteristics more well known in the art are not described.
Should be understood that, the present invention can implement in different forms, and should not be interpreted as the embodiment that is confined to propose here.On the contrary, provide these embodiments will expose thoroughly with complete, and scope of the present invention is fully passed to those skilled in the art.In the accompanying drawings, in order to clear, the size in Ceng He district and relative dimension may be exaggerated.Same reference numerals represents identical element from start to finish.
Spatial relation term such as " ... under ", " ... below ", " below ", " ... under ", " ... on ", " above " etc., here can be used thus the relation of the element of shown in description figure or feature and other element or feature for convenience of description.It should be understood that except the orientation shown in figure, spatial relation term intention also comprises the different orientation of the device in using and operating.Such as, if the device upset in accompanying drawing, then, be described as " below other element " or " under it " or " under it " element or feature will be oriented to other element or feature " on ".Therefore, exemplary term " ... below " and " ... under " upper and lower two orientations can be comprised.Device can additionally orientation (90-degree rotation or other orientation) and as used herein spatial description language correspondingly explained.
The object of term is only to describe specific embodiment and not as restriction of the present invention as used herein.When this uses, " one ", " one " and " described/to be somebody's turn to do " of singulative is also intended to comprise plural form, unless context is known point out other mode.It is also to be understood that term " composition " and/or " comprising ", when using in this specification, determine the existence of described feature, integer, step, operation, element and/or parts, but do not get rid of one or more other feature, integer, step, operation, element, the existence of parts and/or group or interpolation.When this uses, term "and/or" comprises any of relevant Listed Items and all combinations.
Embodiment 1
The present invention is in order to solve problems of the prior art, provide a kind of dehydration and drying device of sewage sludge, comprise: by the wet mud storing/conveying system of the pipeline connection of closed, sludge dewatering system and sludge drying system, to be respectively used to, to described mud conveying, storage, modification, dewater to described mud and carry out mummification granulating to described mud;
Wherein, described sludge dewatering system at least comprises high-pressure elastomeric filtering equipment, to improve the operating pressure of pressure filter;
Described sludge drying system at least comprises horizontal disc drying equipment, with by the described sludge drying after modifying and dewatering.
Wherein, as shown in Figure 1, the dehydration and drying device of described sewage sludge comprise mud storage conveying device 1, modifier hopper 2, properties-correcting agent handling equipment 3, modification modulator tube 4, modulated sludge buffer tank 5, sludge pump 6, high-pressure elastomeric filtering equipment 7, slope conveyor 8, buffer memory feed bin 9, disc type drying equipment 10, with fly-ash separator 11, condenser 12 and biological deodorizing device 13.
Below in conjunction with accompanying drawing, described device is further described:
(1) wet mud storing/conveying system
Sewage work's dewatered sludge is poured in the sludge storage bin in factory by vehicle-mounted mode of movement; Sludge storage bin is carbon steel structure, preferably adopts underground type.The storage capacity of sludge storage bin volume general satisfaction 1.5d.Supporting slide block mechanism in sludge bin, prevents mud from building bridge.Supporting double-shaft spiral transfer roller at the bottom of sludge bin, is sent in sludge pump by double-shaft spiral transfer roller.
Sludge pump 6 preferably adopts ram pump, and mud is sent in modified tempering tank by sludge pump.The storage of mud and delivery system, adopt the piping system of closed tin, and what prevent material spills overflow loose with foul smell.
Supporting whipping appts in modified tempering tank 4, the sludge agitation time is no less than 45min; Properties-correcting agent preferably adopts lime, flyash system coarse aggregate reagent, and lime-crushed stone pile is about mud butt amount 15-20%, compares in tradition and presses barrier film sheet frame to reduce by 1/2; Sludge modification tank adopts pitch anticorrosion.
Modified mud flows automatically to mud buffer tank 5, and buffer tank arranges the storage capacity of 1d.Buffer tank adopts carbon steel structure or Reinforced Concrete Structure.Supporting vertical agitating apparatus in buffer tank.
Mud in buffer tank is transported in high-pressure elastomeric filtering equipment 7 by sludge pump.
Optimization design of the present invention mud stores and delivery system, can centrally dispose external mud (water ratio 70-80%), by the pipeline pumping mode of closed, ensure that on-the-spot environmental health.
(2) sludge dewatering system
The present invention adopts high-pressure elastomeric filtering equipment, improves the operating pressure of pressure filter and optimizes the sequence of operation of squeeze section, simplifies system flow and reduces additive amount of medicament.
Mud in buffer tank is transported in high-pressure elastomeric filtering equipment 7 by sludge pump.High-pressure elastomeric filtering equipment is by hydraulic drive, and operating pressure is 50bar, is 3-4 times of operating pressure of current barrier film sheet frame equipment used.
High-pressure elastomeric filtering equipment mainly comprises: frame and Controlling System, filter plate and filter cloth system, automatic pulling plate mechanism, Jie Ye mechanism.
Wherein, frame and Controlling System mainly comprise tailgate, push pedal, girder, electrical control cubicles etc.Main Function is fastening main body, carries out neat arrangement and compression to high filter press plate, matching board and filter cloth, and the operations such as the charging of operating device, squeezing, discharging.
Wherein, filter plate and filter cloth system mainly comprise ultra-high voltage filter plate, matching board, spring medium, filter cloth specialized.Its Main Function is supporting filter cloth, completes charging, squeezes, retains and filter and go out the operations such as filtrate.
Wherein, automatic pulling plate mechanism mainly comprises variable frequency reducer motor, frequency transformer, manipulator of automatic pulling plate, chain drive-belt, gets arm-tie track, chain guard cover etc.Mechanism drives manipulator of automatic pulling plate to carry out getting plate, arm-tie, to reach the effect of automatic discharging by variable frequency reducer motor.
Wherein, Jie Ye mechanism is made up of carbon steel skeleton, liquid dish, driving mechanism etc., is mainly used in leakage when accepting filtration and filter cloth cleaning.
Wherein, hydraulic efficiency system mainly comprises Hydraulic Station, oil cylinder, cylinder support, valve instrument etc., and its Main Function is to provide pressure and makes spring contraction, filters and twice pressing dehydration to realize sewage sludge feed.
The filter plate of high-pressure elastomeric filtering equipment 7 is compared with traditional polypropylene compression moulding filter frame, steel filter frame more can high temperature high voltage resistant, clear up easy, owing to carrying out twice pressing, cake moisture is lower, processing power significantly improves, intensity, antifatigue degree, anti-aging degree significantly promote, and work-ing life extends greatly.Filter-plate structure is divided into matching board A and high filter press plate B, is carbon steel material, and matching board A adopts bolt and spring to be connected as Figure 2-3 with high filter press plate B.Matching board A and high filter press plate B is combined as a module, press filtration module overcoat polymer filter cloth.
Wherein, matching board A plate filter plate adopts chromium plating process, improves the erosion resistance of filter plate material.
Wherein, filter cloth preferably adopts polypropylene fibre, acrylic fibers material.
Wherein, spring adopts 55CrSi material, and spray paint, improve antiseptic property;
Wherein, mud is distributed to each chamber by strainer plate module centre hole after sending into high-pressure elastomeric filtering equipment by sludge pump; Pumping mud time general control, at about 15-20min, reserves the dwell time; The sludge press filtration time preferably controls at 75-90min, and by optimizing charging order, time, pressure and other parameters, improve mechanical dehydration ability, sequence of operation method sees the following form.Compared with traditional barrier film sheet frame, time of filter pressing of the present invention shortens about 1/2-3/4; After press filtration, moisture percentage in sewage sludge is about 55-65%.
Press filtration sequence of operation table
(3) sludge drying system
The present invention adopts horizontal disc drying equipment, preferably adopts steam as heating agent, below the sludge drying to 40% after modifying and dewatering, does not need mud " back-mixing " or " granulation ".
Mud after press filtration falls in worm conveyor by funnel, and then by sending in disk desiccation apparatus 10, wet mud, by the indirect heat exchange with heating agent (water vapour), by shaping for a mud mummification, does not need back-mixing and granulation.
Disc dryer forms primarily of cylindrical shell, disk main shaft, transmission rig and steam heating system.Cylindrical shell is the cylindrical of jacketed, passes into steam in chuck, and water port is arranged at bottom.A venting port is arranged at cylindrical shell top, in order to discharge the water vapor evaporated; An opening for feed, wet stock adds in drying machine thus.Cylinder body bottom has a discharge gate, for discharging dry material.Bottom, cylindrical shell two ends respectively has one to clean discharge outlet.Also blocking material plate is housed above cylindrical shell, makes rotating disk keep self-cleaning.Main shaft in cylindrical shell is made up of a hollow spindle and hollow disk.Main shaft passes into steam, and is assigned in disk, and water of condensation and non-condensable gas are discharged from axle head by swivel joint.
The disk outer rim of main shaft is equipped with blade, makes material can along drying machine cylindrical shell to the slowly movement of discharge port direction.The drying of material main shaft, disk is heated by steam, material fully contacted, then is discharged by induced draft fan.Drying machine main shaft carrys out driven rotary by motor and retarding mechanism.Steam heating system is made up of swivel joint, metallic hose, trap, stopping valve, ball valve, window, steam separator etc., thus ensures that main shaft disk is full of saturation steam all the time, and ensures that water of condensation is discharged smoothly.
Wherein, disk desiccation machine internal structure as shown in Figure 4.Selected horizontal disc desiccation machine, considers the factor that in domestic sewage sludge, sediment concentration is high.Propelling and the stirring of mud rely on bolted blade on disk, and blade is divided into inclination blade and horizontal blade, and horizontal blade mainly plays stirring action, and inclination blade mainly plays prograding.
Preferably, bear propelling agitaion by horizontal blade and inclination blade, the disk of desiccation machine assume responsibility for the effect of heat exchange.
Pass into steam in disc, steam by with mud indirect contact after be converted into steam condenses, be back in quill shaft by pipeline, the steam condenses in quill shaft is transported to boiler systems by pressure, and the consumption of steam is about 0.4-0.45t/t mud.
Preferably, the disc rotation speed of disk desiccation machine is 1-5rpm, and drive-motor frequency conversion is adjustable.
Disk drying equipment establishes fresh air carrier gas port, and the tail gas that mummification produces is extracted out by induced draft fan, and the mass ratio of water vapour and atmospheric carrier is 1:1.
Described sludge drying system is also connected with fly-ash separator and/or condenser and/or biological deodorizing device.
Tail gas goes out a small amount of dust through pre-dedusting, and enter condenser after dedusting by the water vapor condensation in tail gas, final tail gas enters in odor removal, and the gas after deodorizing reaches the discharge of foul gas secondary discharge standard.
Wherein, pre-duster adopts tornado dust collector or the sack cleaner of carrying vapour insulation, and efficiency of dust collection is greater than 95%.Condenser adopts indirect condensing mode.
Often overlap deodoration system pumping by two table glass steel centrifugal blowers, foul smell is directly imported biological deodorizing equipment from gathering system.The integrated biological filter of biological deodorizing, humidifier and filter bed are integrated, and pond body is fixed cuboid full-closed structure, and material is the glass epoxy of band aluminium-plastic panel, has sufficient intensity and rigidity.Stainless steel stent is provided with, for the anticorrosion filter plate of mounting glass steel in biological filter.
Inner at biological deodorizing device, biologic packing material is placed on filter plate, is the high effective composite packing adopting multilayer grating.In filler, organic and inorganic components in certain proportion mixing, to improve mechanical property, can avoid the compacting of filler so effectively.This high-performance bio filler, because having good permeability and structural stability, can ensure through long-time running, and the pressure-losses is also very little.
Steam source is boiler.Supporting reducing-and-cooling plant between vapour pipe to desiccation machine entrance, obtains 0.6Mpa by reducing-and-cooling plant, the low-grade steam of 160 DEG C.Steam condenses is back to boiler systems.
Mud after mummification can send into power plant or garbage power plant incineration disposal.
Dehydration and drying equipment organically combine by the present invention, utilize mechanical energy and heat energy, reduce the working cost of sludge treatment according to dehydration difficulty gradient.
Embodiment 2
Present invention also offers a kind of dehydration and drying method based on said apparatus, comprising:
Step S1: mud is delivered to described wet mud storing/conveying system, to carry described mud, to store, modification;
Step S2: modified described mud is delivered to described sludge dewatering system, by repeatedly charging repeatedly press filtration in described high-pressure elastomeric filtering equipment, removes the water in described mud;
Step S3: the mud after the press filtration of described high-pressure elastomeric filtering equipment enters described sludge drying system, carries out dry granulating to the mud after dehydration in described horizontal disc drying equipment.
Particularly, sewage work's dewatered sludge is poured in the sludge storage bin in factory by vehicle-mounted mode of movement; Supporting double-shaft spiral transfer roller at the bottom of sludge bin, is sent in sludge pump by double-shaft spiral transfer roller.
Mud is sent in modified tempering tank by sludge pump.The storage of mud and delivery system, adopt the piping system of closed tin, and what prevent material spills overflow loose with foul smell.
In modification procedure, the sludge agitation time is no less than 45min; Properties-correcting agent preferably adopts lime, flyash system coarse aggregate reagent, and lime-crushed stone pile is about mud butt amount 15-20%, compares in tradition and presses barrier film sheet frame to reduce by 1/2; Sludge modification tank adopts pitch anticorrosion.
Modified mud flows automatically to mud buffer tank 5, and buffer tank arranges the storage capacity of 1d.Buffer tank adopts carbon steel structure or Reinforced Concrete Structure.Supporting vertical agitating apparatus in buffer tank.
Mud in buffer tank is transported in high-pressure elastomeric filtering equipment 7 by sludge pump.
Optimization design of the present invention mud stores and delivery system, can centrally dispose external mud (water ratio 70-80%), by the pipeline pumping mode of closed, ensure that on-the-spot environmental health.
In described step S2, the mud in buffer tank is transported in high-pressure elastomeric filtering equipment 7 by sludge pump.High-pressure elastomeric filtering equipment is by hydraulic drive, and operating pressure is 50bar, is 3-4 times of operating pressure of current barrier film sheet frame equipment used.
Mud is distributed to each chamber by strainer plate module centre hole after sending into high-pressure elastomeric filtering equipment by sludge pump; Pumping mud time general control, at about 15-20min, reserves the dwell time; The sludge press filtration time preferably controls at 75-90min, and by optimizing charging order, time, pressure and other parameters, improve mechanical dehydration ability, sequence of operation method sees the following form.Compared with traditional barrier film sheet frame, time of filter pressing of the present invention shortens about 1/2-3/4; After press filtration, moisture percentage in sewage sludge is about 55-65%.
Press filtration sequence of operation table
In described step S3, mud after press filtration falls in worm conveyor by funnel, and then by sending in disk desiccation apparatus 10, wet mud is by the indirect heat exchange with heating agent (water vapour), by shaping for a mud mummification, do not need back-mixing and granulation.
Pass into steam in disc, steam by with mud indirect contact after be converted into steam condenses, be back in quill shaft by pipeline, the steam condenses in quill shaft is transported to boiler systems by pressure, and the consumption of steam is about 0.4-0.45t/t mud.
Preferably, the disc rotation speed of disk desiccation machine is 1-5rpm, and drive-motor frequency conversion is adjustable.
Disk drying equipment establishes fresh air carrier gas port, and the tail gas that mummification produces is extracted out by induced draft fan, and the mass ratio of water vapour and atmospheric carrier is 1:1.
Described sludge drying system is also connected with fly-ash separator and/or condenser and/or biological deodorizing device.
Tail gas goes out a small amount of dust through pre-dedusting, and enter condenser after dedusting by the water vapor condensation in tail gas, final tail gas enters in odor removal, and the gas after deodorizing reaches the discharge of foul gas secondary discharge standard.
Wherein, pre-duster adopts tornado dust collector or the sack cleaner of carrying vapour insulation, and efficiency of dust collection is greater than 95%.Condenser adopts indirect condensing mode.
Often overlap deodoration system pumping by two table glass steel centrifugal blowers, foul smell is directly imported biological deodorizing equipment from gathering system.The integrated biological filter of biological deodorizing, humidifier and filter bed are integrated, and pond body is fixed cuboid full-closed structure, and material is the glass epoxy of band aluminium-plastic panel, has sufficient intensity and rigidity.Stainless steel stent is provided with, for the anticorrosion filter plate of mounting glass steel in biological filter.
Inner at biological deodorizing device, biologic packing material is placed on filter plate, is the high effective composite packing adopting multilayer grating.In filler, organic and inorganic components in certain proportion mixing, to improve mechanical property, can avoid the compacting of filler so effectively.This high-performance bio filler, because having good permeability and structural stability, can ensure through long-time running, and the pressure-losses is also very little.
Steam source is boiler.Supporting reducing-and-cooling plant between vapour pipe to desiccation machine entrance, obtains 0.6Mpa by reducing-and-cooling plant, the low-grade steam of 160 DEG C.Steam condenses is back to boiler systems.
Mud after mummification can send into power plant or garbage power plant incineration disposal.
Dehydration and drying equipment organically combine by the present invention, utilize mechanical energy and heat energy, reduce the working cost of sludge treatment according to dehydration difficulty gradient.
The present invention compared with prior art has significant beneficial effect:
1, optimization design of the present invention mud stores and delivery system, can centrally dispose external mud (water ratio 70-80%), by the pipeline pumping mode of closed, ensure that on-the-spot environmental health.
2, the present invention adopts high-pressure elastomeric filtering equipment, improves the operating pressure of pressure filter and optimizes the sequence of operation of squeeze section, simplifies system flow and reduces additive amount of medicament.
3, the present invention adopts horizontal disc drying equipment, preferably adopts steam as heating agent, below the sludge drying to 40% after modifying and dewatering, does not need mud " back-mixing " or " granulation ".
4, dehydration and drying equipment organically combine by the present invention, utilize mechanical energy and heat energy, reduce the working cost of sludge treatment according to dehydration difficulty gradient.
Device of the present invention and described method have the following advantages:
1, the present invention is applicable to process and disposes the mud of different water cut, from the mud of different sewage treatment plant all by this art breading.
2, mud is sent in sludge storage bin by the mode of vehicle-mounted transport, and then by pump and Pipeline transport, do not produce because mud has bad luck the environmental pollution of generation, environmental health is good.
3, meet the requirement of different town sewage plant moisture percentage in sewage sludge change, adaptable, stability is high, and processing costs is lower.
4, mud is by modification conditioning system, and the sludge agitation time is no less than 45min, improves sludge press filtration performance, by changing sheet frame material, sets up spring device, improves the pressure between filter plate, makes pressure energy bring up to 30-50bar; By optimizing sewage sludge feed and press filtration sequence of operation, improve dewatering performance of sludge; Properties-correcting agent preferably adopts lime, flyash system coarse aggregate reagent, and lime-crushed stone pile is about mud butt amount 15-20%, compares in tradition and presses barrier film sheet frame to reduce by 1/2; After the press filtration of high-pressure elastomeric filtering equipment, mud is carried by shaftless screw, avoids leakage and the environmental pollution of material.
5, preferably adopt horizontal disc drying equipment, by arranging inclination blade and horizontal blade bears stirring prograding, improve disk antiwear property, being specially adapted to the sewage sludge of Gao Hansha.Disc type drying equipment is energy-efficient equipment, and the consumption of steam is about 0.4-0.45t/t mud, is about conventional heat drying technique 1/2; In addition disc type sludge drying process system negative pressure is run, and stenchless escaping, environmental health is controlled well.
6, after high pressure press filtration and mummification, the water ratio of mud is reduced to less than 40%, is generally 30-40%; Due to less at treating processes Chinese medicine addition, the change of mud dry base heat value is little, is convenient to final at power plant or garbage power plant incineration disposal.
The present invention is illustrated by above-described embodiment, but should be understood that, above-described embodiment just for the object of illustrating and illustrate, and is not intended to the present invention to be limited in described scope of embodiments.In addition it will be appreciated by persons skilled in the art that the present invention is not limited to above-described embodiment, more kinds of variants and modifications can also be made according to instruction of the present invention, within these variants and modifications all drop on the present invention's scope required for protection.Protection scope of the present invention defined by the appended claims and equivalent scope thereof.
Claims (14)
1. the dehydration and drying device of a sewage sludge, comprise: by the wet mud storing/conveying system of the pipeline connection of closed, sludge dewatering system and sludge drying system, to be respectively used to, to described mud conveying, storage, modification, dewater to described mud and carry out mummification granulating to described mud;
Wherein, described sludge dewatering system at least comprises high-pressure elastomeric filtering equipment, to improve the operating pressure of pressure filter;
Described sludge drying system at least comprises horizontal disc drying equipment, with by the described sludge drying after modifying and dewatering.
2. device according to claim 1, is characterized in that, described high-pressure elastomeric filtering equipment comprises matching board and is positioned at the high filter press plate above described matching board, and wherein, described matching board is connected by spring with described high filter press plate.
3. device according to claim 2, is characterized in that, described high-pressure elastomeric filtering equipment also comprises the filter cloth be set on described matching board and described high filter press plate further.
4. device according to claim 1, it is characterized in that, described horizontal disc drying equipment comprises cylindrical shell and is positioned at the main shaft of described cylindrical shell, and described main shaft comprises quill shaft and the hollow disk with described quill shaft gas communication, wherein, described quill shaft is communicated with steam-heating apparatus.
5. device according to claim 4, is characterized in that, the outer rim of described hollow disk is provided with arc plate, and described arc plate comprises pitched blade and/or horizontal paddle, for advancing and/or stirring described mud.
6. device according to claim 1, is characterized in that, described wet mud storing/conveying system comprises the mud storage conveying device, modified tempering tank and the mud buffer tank that are communicated with successively, for accepting mud and described mud being carried out modification.
7. device according to claim 1, is characterized in that, is also provided with slope conveyor and buffer bin between described sludge dewatering system and described sludge drying system.
8. device according to claim 1, is characterized in that, described sludge drying system is also connected with fly-ash separator and/or condenser and/or biological deodorizing device.
9., based on a dehydration and drying method for the described device of one of claim 1 to 8, comprising:
Step S1: mud is delivered to described wet mud storing/conveying system, to carry described mud, to store, modification;
Step S2: modified described mud is delivered to described sludge dewatering system, by repeatedly charging repeatedly press filtration in described high-pressure elastomeric filtering equipment, removes the water in described mud;
Step S3: the mud after the press filtration of described high-pressure elastomeric filtering equipment enters described sludge drying system, carries out dry granulating to the mud after dehydration in described horizontal disc drying equipment.
10. method according to claim 9, is characterized in that, described in described step S2, the feed time of mud is 10-25min, and the reserved dwell time; The time of filter pressing of described mud is 75-90min.
11. methods according to claim 9, is characterized in that, carry out twice charging, twice press filtration in described step S2, and to press filtration, moisture percentage in sewage sludge is 55-65%.
12. methods according to claim 9, it is characterized in that, described mud in described step S3 after press filtration enters in described horizontal disc drying equipment, thermal medium is passed in quill shaft and hollow disk, described mud and described hollow disk carry out heat exchange, and advanced by mud described in the rotation forces of described quill shaft, mud described in last mummification granulation.
13. methods according to claim 9, is characterized in that, add the 15-20% properties-correcting agent based on mud butt amount, and whip modified are no less than 45min in described step S1 at described mud.
14. methods according to claim 9, is characterized in that, also comprise the step of the tail gas of described horizontal disc drying equipment discharge being carried out to dedusting and/or condensation and/or deodorizing after described step S3 further.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510749745.2A CN105271629A (en) | 2015-11-05 | 2015-11-05 | Dehydration and desiccation device and method for sewage sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510749745.2A CN105271629A (en) | 2015-11-05 | 2015-11-05 | Dehydration and desiccation device and method for sewage sludge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105271629A true CN105271629A (en) | 2016-01-27 |
Family
ID=55141565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510749745.2A Pending CN105271629A (en) | 2015-11-05 | 2015-11-05 | Dehydration and desiccation device and method for sewage sludge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105271629A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106746448A (en) * | 2016-12-07 | 2017-05-31 | 上海中耀环保实业有限公司 | A kind of continuous deep dehydration cooperating with low-temperature sludge drying method |
| CN107089785A (en) * | 2017-06-30 | 2017-08-25 | 无锡绿麦环保科技有限公司 | Sludge drying dewatering system |
| CN107935354A (en) * | 2016-10-13 | 2018-04-20 | 光大水务（深圳）有限公司 | Sewage sludge continuous band and the complete processing system of heat pump desiccation and processing method |
| CN109836026A (en) * | 2019-04-03 | 2019-06-04 | 平湖市三禾染整有限公司 | A kind of dyeing and finishing device for dehydrating sladge waste and its technique |
| CN113338080A (en) * | 2021-05-31 | 2021-09-03 | 浙江工业大学 | System and process for preparing fiberboard from sludge and textile industry waste |
| CN113617817A (en) * | 2021-07-09 | 2021-11-09 | 苏州市宏宇环境科技股份有限公司 | Equipment and method for treating tail soil sludge leached from heavy metal contaminated soil |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201735221U (en) * | 2010-07-12 | 2011-02-09 | 杭州鸿跃能源环境工程技术有限公司 | High-pressure variable volume filtering unit for presser |
| CN203794764U (en) * | 2014-04-24 | 2014-08-27 | 广东河山环保有限公司 | Domestic sludge deep drying and resource utilization integrated device |
| CN203855503U (en) * | 2014-04-25 | 2014-10-01 | 江苏中世环境科技股份有限公司 | Sludge treatment system with sludge in-situ reduction function |
| JP2015054287A (en) * | 2013-09-12 | 2015-03-23 | 株式会社石垣 | Sludge treatment method |
| CN204569699U (en) * | 2015-02-27 | 2015-08-19 | 南通万达锅炉有限公司 | Mud integrated treating device |
| CN204625456U (en) * | 2015-03-11 | 2015-09-09 | 中科实业集团（控股）有限公司 | Sludge drying machine |
| CN205133383U (en) * | 2015-11-05 | 2016-04-06 | 光大环保技术研究院（深圳）有限公司 | Sewage sludge's dehydrating drying device |
-
2015
- 2015-11-05 CN CN201510749745.2A patent/CN105271629A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201735221U (en) * | 2010-07-12 | 2011-02-09 | 杭州鸿跃能源环境工程技术有限公司 | High-pressure variable volume filtering unit for presser |
| JP2015054287A (en) * | 2013-09-12 | 2015-03-23 | 株式会社石垣 | Sludge treatment method |
| CN203794764U (en) * | 2014-04-24 | 2014-08-27 | 广东河山环保有限公司 | Domestic sludge deep drying and resource utilization integrated device |
| CN203855503U (en) * | 2014-04-25 | 2014-10-01 | 江苏中世环境科技股份有限公司 | Sludge treatment system with sludge in-situ reduction function |
| CN204569699U (en) * | 2015-02-27 | 2015-08-19 | 南通万达锅炉有限公司 | Mud integrated treating device |
| CN204625456U (en) * | 2015-03-11 | 2015-09-09 | 中科实业集团（控股）有限公司 | Sludge drying machine |
| CN205133383U (en) * | 2015-11-05 | 2016-04-06 | 光大环保技术研究院（深圳）有限公司 | Sewage sludge's dehydrating drying device |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107935354A (en) * | 2016-10-13 | 2018-04-20 | 光大水务（深圳）有限公司 | Sewage sludge continuous band and the complete processing system of heat pump desiccation and processing method |
| CN106746448A (en) * | 2016-12-07 | 2017-05-31 | 上海中耀环保实业有限公司 | A kind of continuous deep dehydration cooperating with low-temperature sludge drying method |
| CN106746448B (en) * | 2016-12-07 | 2019-09-10 | 上海中耀环保实业有限公司 | A kind of continuous deep dehydration cooperating with low-temperature sludge drying method |
| CN107089785A (en) * | 2017-06-30 | 2017-08-25 | 无锡绿麦环保科技有限公司 | Sludge drying dewatering system |
| CN109836026A (en) * | 2019-04-03 | 2019-06-04 | 平湖市三禾染整有限公司 | A kind of dyeing and finishing device for dehydrating sladge waste and its technique |
| CN113338080A (en) * | 2021-05-31 | 2021-09-03 | 浙江工业大学 | System and process for preparing fiberboard from sludge and textile industry waste |
| CN113617817A (en) * | 2021-07-09 | 2021-11-09 | 苏州市宏宇环境科技股份有限公司 | Equipment and method for treating tail soil sludge leached from heavy metal contaminated soil |
| CN113617817B (en) * | 2021-07-09 | 2022-07-12 | 苏州市宏宇环境科技股份有限公司 | Equipment and method for treating tail soil sludge leached from heavy metal contaminated soil |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105271629A (en) | Dehydration and desiccation device and method for sewage sludge | |
| CN101823825B (en) | Sludge dehydrating and drying process method and device | |
| CN101844859B (en) | Complete steam low-temperature thermally tempering and drying device and method for sludge | |
| CN102730912B (en) | Integrated sewage-sludge treatment method | |
| CN103693836B (en) | Sludge treatment method and device | |
| CN111847824A (en) | Three-stage type dewatering and drying system and method for sludge in domestic sewage treatment plant | |
| DE102009004619A1 (en) | Process and plant for the creation of an alternative treatment plant for the treatment of municipal, industrial and agricultural wastewater and sludge | |
| CN202415341U (en) | Device capable of integrating high-pressure dehydration, drying and deodorization for sludge | |
| EP2543643B1 (en) | Installation de sechage universelle a double paroi | |
| CN102861762B (en) | Anaerobic digestion treatment method for organic garbages | |
| CN103524008B (en) | Automatic processing handling process for zero discharge of sludge for urban sewage plant | |
| CN111333304A (en) | Integrated treatment method and system for sludge | |
| CN202297333U (en) | Dehydration drying low-temperature pyrolysis sludge treatment device | |
| CN202924891U (en) | Sludge drying belt filter press | |
| CN102351396A (en) | Sludge drying equipment using waste heat of landfill gas power generation | |
| CN105036512B (en) | The one-stop processing equipment of sludge and technical process | |
| CN205133383U (en) | Sewage sludge's dehydrating drying device | |
| CN203976600U (en) | A kind of city disposal of oily sludge system | |
| CN106854031A (en) | A kind of recycling handles method for dirty mire and its processing system | |
| CN205874171U (en) | Mud resourceful treatment device | |
| CN203823763U (en) | Integrated system of thermal dehydration, waste-heat drying and fluidized incineration of urban sludge | |
| CN212610195U (en) | Sludge three-section type dehydration and drying system in domestic sewage treatment plant | |
| CN213407831U (en) | Treatment system for treating sponge production wastewater | |
| CN207451895U (en) | Processing system containing miscellaneous sludge | |
| CN203144261U (en) | Sludge drying treatment system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160127 |