CN101602565B - Process for treating dehydrated sludge in sewage treatment plant - Google Patents

Process for treating dehydrated sludge in sewage treatment plant Download PDF

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Publication number
CN101602565B
CN101602565B CN2009100697293A CN200910069729A CN101602565B CN 101602565 B CN101602565 B CN 101602565B CN 2009100697293 A CN2009100697293 A CN 2009100697293A CN 200910069729 A CN200910069729 A CN 200910069729A CN 101602565 B CN101602565 B CN 101602565B
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mud
type mud
type
drying
fire grate
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CN2009100697293A
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Chinese (zh)
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CN101602565A (en
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史海峰
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史海峰
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Abstract

The invention relates to a process for treating dehydrated sludge in a sewage treatment plant, which comprises wet sludge drying, wet sludge molding and molded sludge burning. The process uses two novel devices comprising a rolling type dryer and a molded sludge burning furnace, has the advantages of scientific and reasonable design, good drying effect, high thermal energy utilization rate, thorough burning and high production efficiency, is a more advanced industrial sludge treatment process, and effectively promotes the development of sludge treatment technology in the sewage treatment plant.

Description

Process for treating dehydrated sludge in sewage treatment plant
Technical field
The invention belongs to the Treatment of Sludge technology, especially a kind of process for treating dehydrated sludge in sewage treatment plant.
Background technology
Sewage treatment plant carries out the mud that produced after the water treatment, and after preliminary concentrating, moisture content needs to adopt organic polymer coargulator to flocculate still more than 80% usually, and the liquid viscosity of flocculant is higher, still is the thickness colloidal substance through mud behind the mechanical dehydration.It is more that these mud contain harmful material, can not as fertilizer sources, and can not directly bury again and abandon processing, can only handle mud, processing procedure mainly adopts drying, burning mode.The technical problem that exists in drying, burning process is at present: 1, drying generally adopts roller drier, its barrel is welded with flight or lifting blade mostly, this drying machine directly carries out drying to the mud that is thick behind mechanical dehydration, water content is very big, often occurs problems such as sticking wall, caking, obstruction in dry run.Therefore the mud behind mechanical dehydration must mix with the backflow sludge-drying in special conveying and mixing apparatus, could carry out drying to it to reach rational solid content, and can form dust behind the drying sludge, causes secondary pollution.The water evaporates of mud is a steam when 2, burning, and organic compound combustion produces carbon dioxide and pernicious gas, is very easy to cause secondary pollution, and existing industrial incinerator mainly adopts other thermals source to burn, and has wasted a large amount of energy.3, whole sludge treating system overall structure is unreasonable, and discharging has a large amount of harmful substances inevitably, and environment protecting is relatively poor, and thermal source utilizes unreasonable and needs a large amount of extra powers, and production efficiency is lower.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, the process for treating dehydrated sludge in sewage treatment plant that a kind of technology is simple, environment protecting good, the thermal source utilization is reasonable, production efficiency is high is provided.
The present invention solves its technical problem and is achieved through the following technical solutions:
A kind of process for treating dehydrated sludge in sewage treatment plant comprises that wet mud drying, wet mud moulding, type mud burn, wherein:
(1) wet mud drying: wet mud is extruded into mud bar or slice through the mud nozzle and drops on the cylinder and scraper in the drying machine, roll, carry, scrape the repetition period motion by cylinder, form thin slice and on the drying bed below the cylinder, carry out drying, fall into sludge hopper after the drying, the half-dried mud in the sludge hopper is expelled to type mud make-up machine through the mud mouth rotation;
The high-temperature flue gas that incinerator produces enters the gas approach that rolls drying machine through pipeline, heat is delivered on the drying bed mud is added heat drying, and the flue gas of discharge is discharged by chimney after cooling, washing;
(2) wet mud moulding: the half-dried mud of being discharged by the mud mouth revolving door enters type mud make-up machine by high-pressure extrusion glomeration, ovum shape or hollow ball-shape, enters dryness storehouse and stores also further dry;
(3) type mud burns: type mud can enter the type bucket through conveying device when being dried to moisture 20%-40% (or moisture content of suitable incinerator burning condition) in the storing and drying storehouse, throw in controller, type mud input slideway via type mud screening slideway, type mud, enter that formation type mud layer burns on the type mud incineration furnace grate, the body refuse that the burning back forms is discharged by cleanout door.
And, the structure of described drying machine is: comprise vaporization chamber, steam (vapor) outlet, the mud import, drying bed, sludge hopper, drying bed is in vaporization chamber, steam (vapor) outlet is arranged on the top of vaporization chamber, the mud import is arranged on the vaporization chamber of drying bed high-temperature flue gas inlet side top, sludge hopper is arranged on the vaporization chamber of drying bed high-temperature flue gas outlet side below, the inner channel cavity that forms a plurality of high-temperature flue gas of drying bed, operation is equipped with drum assembly on drying bed, the structure of this drum assembly is: the two ends on drying bed are fixed with a pair of drive sprocket and a pair of driven sprocket respectively, all the sealing engagement is equipped with two chains on two pairs of sprocket wheels, between two chains, laterally be evenly equipped with drum assembly, this drum assembly is by cylinder, be packed in the concentric power transmission shaft at cylinder two ends, be packed in the gear on the power transmission shaft, being the scraper that tangentially installs with cylinder forms, on the drying bed between each chain and the cylinder, all be fixed with a spur rack, this spur rack all with the coaxial gear that installs is meshed in the cylinder both sides, all tangentially is fixed with a scraper in the front side of each cylinder.
And described type mud incinerator comprises combustion chamber, fire grate system, dreg removing system and type mud dosing system, and the combustion chamber lower bottom part is equipped with fire grate system, and the fire grate below is a dreg removing system, and concrete structure is:
(1) combustion chamber comprises that body of heater, burner hearth, chimney constitute, and the arch top center is equipped with pyrometer couple for connecting the chimney of high-temperature flue on chimney;
(2) fire grate system is driven by fire grate, fire grate and constitutes, comprise fixed grate and slip fire grate and interval layout, wherein promptly close furnace wall, both sides is fixed grate, be provided with the slip fire grate between the adjacent fixed grate, the slip fire grate can be put in order group or singlely reciprocatingly slide vertically, it is movable handle that the slip fire grate stretches out the outer end of stove, and this activity handle drives its axially-movable of control by the fire grate of outside;
(3) dreg removing system is included in air compartment, body refuse storehouse and the intake stack under the fire grate, hot blast enters air compartment by intake stack, and enter the type mud layer by the fire grate gap, and air compartment's lower opening is also installed able to turn on or off air compartment's baffle plate, and air compartment baffle plate below is the body refuse storehouse;
(4) type mud dosing system is arranged on upper of furnace body, throw in slideway and constitute by type bucket, type mud screening slideway, type mud input controller, type mud, type bucket opening part connecting-type mud screening slideway, type mud screening slideway is a rectangular cavities that tilts to install, the other end connecting-type mud of type mud screening slideway is thrown in controller, type mud is thrown in controller connecting-type mud and is thrown in slideway, type mud is thrown in slideway and is formed for the round steel pipe bending of several internal diameters greater than type mud line degree, and the dispensing port that type mud is thrown in slideway is communicated with body of heater internal furnace and uniform setting around body of heater.
And described fire grate is made of many fishbone steel parts, and the slip fire grate is supported by the high temperature resistant sliding bearing that is fixed in two ends; The intake stack of described dreg removing system be provided with slag trap, air compartment is a back taper, air compartment's baffle plate is controlled by air compartment's baffle plate handle; The bottom of described type mud screening slideway is that several round steel rods or steel pipe vertically rearrange, steel rod or steel pipe gap are less than type mud line degree, described controller is to open rectangular opening and the opposite side cylindrical cavity for several circular holes on the lateral column face of a horizontal setting, its rectangular opening connects the screening slideway, and another side circular orifices connecting-type mud is thrown in slideway.
Advantage of the present invention and beneficial effect are:
1, this process using compaction type drying machine, hothouse adopts the vaporization chamber structure of sealing, designed the drying bed that laterally combines by polylith aluminium alloy rectangular cylinder section bar, the a plurality of rectangular cavitys of the inner formation of this drying bed, the top of its outer surface constitutes the smooth working face of a rectangle rolls the heat absorption evaporation as mud thermal source and basis, when being rolled on drying bed, mud closely contacts and a large amount of fast heat absorption with bed surface, thin mud fragment is through the heat absorption that rolls of a plurality of cycle periods, progressively dry after the evaporation, to moisture about 60% or the moisture content of suitable moulding process (this drying machine can be with drying sludge to moisture 20-30%, moisture herein 60% is the technological requirement of mud moulding) brought to mud outlet end by cylinder, fall into sludge hopper, stopped the sticking wall of mud, caking, blockage problem has improved drying effect.
2, the drying machine of this technology adopts the circulation link chain roller system of sealing, reasonable integral structure, and scraper is set on cylinder, when the cylinder winding mud of rotation passes through scraper, mud is scraped falls the formation sheet, and forms and to roll, carry, to scrape the repetition period motion, has strengthened drying area, improved drying efficiency, drying effect is more satisfactory.
3, the incinerator employing type mud of this technology burns, and has effectively avoided the generation of dust to reduce the investment and the operating cost of later stage dust treatment; Employing type mud screening tube shaped has improved type mud feeding efficient, avoids stopping up, and has effectively improved production efficiency and firing efficiency is higher; Adopt fixed grate and the moving grate interval mode of axial displacement, effectively improved the effect of burning and body refuse fragmentation causes when having avoided slagging tap as far as possible dust.
4, this technology has sufficiently and reasonably been utilized self thermal source, and the circulation heating recovery method and the drying machine evaporation-steam condensation heat release-type mud that have formed incinerator-drying machine-heat pipe hot-blast stove-incinerator are stored the cyclic process that dry evaporation-steam condensation heat reclaims, improve the utilization rate of thermal source, saved a large amount of energy.
5, design science of the present invention is reasonable, and drying effect is good, and the utilization efficiency of heat energy height burns thoroughly, and the production efficiency height is a kind of comparatively advanced industrial sludge treatment process, with the favourable development that promotes sewage treatment plant to the Treatment of Sludge technology.
Description of drawings
Fig. 1 is a process chart of the present invention;
Fig. 2 is a drier structure schematic diagram of the present invention;
Fig. 3 is the partial enlarged drawing of the drum assembly of Fig. 2;
Fig. 4 is the structural profile front view (type mud screening passage pendulum turn 90 degrees) of incinerator of the present invention;
Fig. 5 is the vertical view of Fig. 4;
Fig. 6 is that the A-A of Fig. 4 is to cross-sectional view;
Fig. 7 is that the B-B of Fig. 6 is to cross-sectional view;
Fig. 8 is fire grate vertical view of the present utility model (two kinds of motion state).
The specific embodiment
The invention will be further described below in conjunction with accompanying drawing, by specific embodiment, and following examples are descriptive, are not determinate, can not limit protection scope of the present invention with this.
A kind of process for treating dehydrated sludge in sewage treatment plant comprises that wet mud drying, wet mud moulding, type mud burn, and its concrete steps are:
(1) wet mud drying: native system utilizes the calory burning of the mud self of urban wastewater treatment firm generation at first in rolling drying machine the wet mud (about moisture content 80%) after the processed to be carried out drying, the high-temperature flue gas (850~950 ℃) that incinerator produces enters the gas approach that rolls drying machine through insulated piping, from airtight high-temperature flue gas heat-exchange system, pass, heat is delivered to (realization adds heat drying to mud on drying bed) on the drying bed, by rolling flue gas that drying machine discharges, through washing after, discharge (or also can feed sewage disposal system handle the back discharge) then by chimney through heat pipe hot-blast stove or other forms of hot blast heat exchanger rapid cooling.The power of flue gas is provided by air-introduced machine and air blast.
The formation of compaction type drying machine is specially referring to Fig. 2, Fig. 3:
Drying machine comprises vaporization chamber 1, steam (vapor) outlet 6, mud import 9, drying bed 5, sludge hopper 11, wherein: vaporization chamber is an airtight adiabatic cavity body of rectangle, for the heating of mud and evaporation provide a sealing working space, its body of wall is made of filling heat insulator in the double-deck stainless steel; Steam (vapor) outlet is arranged on the upper end of vaporization chamber, is used to collect the damp-heat that produces because of heat exchange; The mud import by many stainless steel tubules that pass the vaporization chamber wall and on tapered mouth or Duckbill type mouth constitute, outside vaporization chamber, these many tubules and one are responsible for and are communicated with the pump discharge that grafts clay, the mud import is arranged on the vaporization chamber of drying bed import top, and sludge hopper is arranged on the vaporization chamber of drying bed outlet below; Drying bed is laterally combined by polylith aluminium alloy rectangular cylinder section bar, the inner channel cavity 4 that forms a plurality of high-temperature flue gas, the top of its outer surface constitutes the smooth working face of a rectangle and rolls thermal source and the basis that heat absorption is evaporated as mud, lays high temperature resistant heat-insulating shield on the inner bottom surface; Sludge hopper is the funnel-shaped container of corrosion resistant plate welding, collects the dried mud that scrapes.
The innovation structure that the present invention relates to drying machine is:
(1) operation is equipped with drum assembly 7 on drying bed, the structure of this drum assembly is: the two ends on drying bed are fixed with a pair of drive sprocket 2 and a pair of driven sprocket 10 respectively, all the sealing engagement is equipped with two chains 13 on two pairs of sprocket wheels, horizontal uniform installation cylinder 17 between two chains, all be fixed with a spur rack 15 on the drying bed between each chain and the cylinder, this spur rack all is meshed with the gear 14 that is installed on the power transmission shaft of cylinder both sides.
(2) all tangentially be fixed with a scraper 16 in the front side of each cylinder, when the cylinder winding mud of rotation passed through scraper, mud is scraped to fall.
(3) two spur racks at the drying bed port of export are shaped on extension, have promptly prolonged the moving displacement of cylinder, and it is above that its length will guarantee that cylinder rotates a circle, to wipe mud off; And at the drying bed end face of this position, between two spur racks, be fixed with a reverse V-shaped chute 3, this chute is positioned at the top of sludge hopper, and its effect is the mud on the cylinder of upper strata chain is directly scraped on chute and to enter sludge hopper in both sides, is taken away by the chain of lower floor avoiding.
(4) two regulating wheels 8 are installed between the drive sprocket of drying bed downside and driven sprocket.
(5) on the sludge hopper below the drive sprocket outlet, a revolving door 12 is installed, blade more than three is installed in this revolving door, the gap of blade and circular arc doorframe is less, can guarantee two blades in the circular arc doorframe when rotation, so that vaporization chamber keeps accurate sealing.
The course of work that mud enters drying machine is:
Wet mud is pressed into by screw pump or other forms of dredge pump and rolls the drying machine mud inlet, be extruded into the mud bar or slice drops on the cylinder and scraper of heat exchange bed surface or rotation through the mud nozzle, roll by cylinder (chain drives on bed surface linear running and rotated to traffic direction by the rack-and-pinion constraint), mud bar that is rolled or slice will be expanded into all thick thin slice and be distributed on the cylinder, and the thin slice that is distributed on cylinder is carried by cylinder and rotates with cylinder; Scraped when being the scraper place of tangential arrangement when it moves to, and then rolled and carry, form with this and roll, carry, scrape the repetition period motion, can stir at random, mix after thin slice is scraped by cylinder with cylinder.When being rolled on drying bed, mud closely contacts a large amount of fast heat absorptions with bed surface, water vapour in a large number can shed when rolling leaves bed surface, steam in the drying machine operating room is discharged through steam outlet by air-introduced machine, and in the drying machine operating room, forming negative pressure, other gases that while mud evaporates are also discharged fast.Thin slice is through the progressively drying that rolls after heat absorption, the evaporation in a plurality of cycles, to moisture about 60% or the moisture content of suitable moulding process (this drying machine can be with drying sludge to moisture 20-30%, moisture herein 60% is the technological requirement of mud moulding) brought to mud outlet end by cylinder, fall into sludge hopper through chute, the half-dried mud in the sludge hopper is discharged through the mud mouth rotation around horizontal rotational shaft.
(1) high-temperature flue gas that rolls drying machine comes from incinerator, and the discharge flue gas that loses the part heat in drying machine enters heat pipe hot-blast stove; After the heat absorbing end of heat supply end with the heat transferred heat pipe of heat pipe hot-blast stove, discharge, cross washing back by the chimney discharge or squeeze into cesspool and be dissolved in the sewage through air-introduced machine; Fresh air after the heat pipe release end of heat heating of heat pipe hot-blast stove enters incinerator and is the burning air feed.Roll the water vapour of emitting in the drying machine vaporization chamber and discharge by steam outlet, enter condensing heat exchanger condensation heat release after, form condensate removal system; Liberated heat is used for type mud bin is heated in the condensation process.
(2) wet mud moulding: the half-dried mud of being discharged by the drying machine revolving door enters type mud make-up machine by the high-pressure extrusion moulding, that type mud can be processed into is spherical, ovum shape or hollow ball-shape (mud is pressed into above-mentioned shape can keep certain mechanical strength), can add the lime of some during moulding according to technology, type mud make-up machine does not repeat them here for utilizing existing shaped coal technology.Because type mud possesses higher mechanical strength, therefore can enter type mud and store dryness storehouse continuation drying, its thermal source is from the hot blast end of condensation fan heater.When being dried to the moisture 20%-40% left and right sides in the storing and drying storehouse, type mud can enter the type bucket of incinerator through conveying device.
(3) type mud burns: type mud is thrown in controller, type mud input slideway via type bucket, type mud screening slideway, type mud, enter by gravity landing or tumble that formation type mud layer burns on the type mud incineration furnace grate, the slag major part that the burning back forms is with the profile of maintenance mud, through special reciprocal grate or other the not fire grate of broken its profile discharges as far as possible of incinerator.Type mud burnt the RT of flue gas in the incinerator stove that produce greater than 2 seconds in incinerator, temperature is more than 850 ℃, and the air feed of incinerator is provided by heat pipe hot-blast stove.
The formation of incinerator is specially referring to Fig. 4,5,6,7,8: be made up of combustion chamber, fire grate system, dreg removing system and type mud dosing system.
The combustion chamber is the space of burning of type mud and various volatilization gas combustion decomposition, comprises that body of heater 20, burner hearth 21, chimney 19 constitute, and body of heater is the cylindricality cavity that steel cylinder inner lining refractory block and fire clay etc. constitute, and coats heat-insulation layer outside steel cylinder; Cavity is burner hearth, and the top of body of heater is an arch, and the arch top center is a chimney, and chimney connects high-temperature flue, and pyrometer couple 18 is installed on chimney.The cylindricality cavity of body of heater is that the burner hearth lower bottom part is equipped with fire grate system, and fire door 36 and maintenance manhole are set on the body of heater.
In order more clearly to illustrate structure of the present utility model, among Fig. 4 type mud dosing system has been carried out 90 and spent rotations.
Fire grate system is by fire grate 27, fire grate driving 39 and motor 41, reductor 40 constitutes, fire grate is made of many fishbone steel parts, comprise fixed grate 44 and slip fire grate 45 and interval layout, wherein promptly close furnace wall, both sides is fixed grate, be provided with a slip fire grate between two adjacent fixed grates, the slip fire grate is supported by the high temperature resistant sliding bearing (not having label) that is fixed in two ends, the slip fire grate can be put in order group (as more than two, present embodiment is two) or singlely reciprocatingly slide vertically, it is movable handle 38 that the slip fire grate stretches out the outer end of stove, and this activity handle can or also can be one (Fig. 8 represents) for (Fig. 5 represents) more than two; Movable handle drives its axially-movable of control by the fire grate of outside, and this fire grate drives to prior art, generally adopt connecting rod or cam mode, but also manpower reciprocatingly slides it.Fire grate drives by the driven by motor decelerator and realizes the power input.Burn to support mud layer 26 thereon less than the maximum dimension of type mud when normal condition in the gap of slip fire grate and fixed grate, when fire grate reciprocatingly slides when making the increase of fire grate gap, the type body refuse that burns falls from it.
Fire grate below is a dreg removing system, is included in air compartment 28, air compartment's baffle plate 35, body refuse storehouse 32 and intake stack 29 under the fire grate.Air compartment is a back taper, enters air compartment from the hot blast of the heat pipe hot-blast stove air intake flashboard 30 by intake stack, and enters mud layer by the fire grate gap; Slag trap 31 is established in the top of intake stack, and air compartment's lower opening is installed able to turn on or off air compartment's baffle plate, and this baffle plate is controlled by air compartment's baffle plate handle 34; This baffle plate is opened during deslagging, and body refuse falls into the body refuse storehouse by this mouthful, and this plate is closed during the incinerator operate as normal, and the body refuse in the body refuse storehouse is discharged by cleanout door 33.
Type mud dosing system is arranged on upper of furnace body, makes type mud enter body of heater to realize free landing mode.Type mud dosing system is thrown in slideway 22 and is constituted by type bucket 25, type mud screening slideway 24, type mud input controller 23, type mud, the type bucket is the funnel-shaped container of side, steel plate welding bottom opening, opening part connecting-type mud screening slideway, the screening slideway is a rectangular cavities that tilts to install, its bottom vertically rearranges for several round steel rods or steel pipe 43, steel rod or steel pipe gap are advanced type of furnace mud 42 and are slipped over thereon less than type mud line degree, and imperfect type mud, broken mud or mud powder sift out at this; The medium-sized mud of present embodiment is spherical, also can be ovum shape or hollow ball-shape, can add the lime of some during moulding according to technology; The other end connecting-type mud of type mud screening slideway is thrown in controller.Controller adopts motor 37 controls, is to open rectangular opening and the opposite side cylindrical cavity for several circular holes on the lateral column face of a horizontal setting, and its rectangular opening connects screening slideway; Another side circular orifices connecting-type mud is thrown in slideway; With the concentric rotating axle of putting of cylindrical cavity, plurality of partitions is installed on the axle radially, two dividing plates are slightly larger than type mud line degree at interval, the inner surface of dividing plate outer rim and cylindrical cavity has a little gap, dividing plate rotates with axle, and the type mud that is got off by the screening slideway during rotation enters dividing plate at interval, rotates with axle, to the opposite side opening part, slip into or roll into type mud and throw in slideway.Type mud is thrown in slideway and is formed for the round steel pipe bending of several internal diameters greater than type mud line degree, cylindrical cavity side one circular hole and the sealing of each bar steel pipe one end connecting-type mud control dispenser, and the type mud dispensing port that the other end connects on the body of heater also seals.Type mud dispensing port is the ceramic pipe that sidewall of the furnace body is passed in an inclination, and the type mud of autotype muddy and slippery road landing is knocked down burner hearth through this earthenware.In the present embodiment, the dispensing port that type mud is thrown in slideway is uniform setting around body of heater, is four uniform dispensing ports shown in Fig. 4.
Incinerator burning is emitted heat sludge-drying-mud formation type mud and is entered incinerator burning heat release and form circulation, and the water vapour that dry run produces reclaims condensation as far as possible, collects its condensation heat and enters system and be used.The flue gas that sludge incineration produces is cooling rapidly in system, and through washing up to standard after the chimney high altitude discharge, or feed and discharge or squeeze into cesspool after sewage disposal system is handled and be dissolved in the sewage.
Operation principle of the present invention is:
The high-temperature flue gas (850~950 ℃) that incinerator produces enters the gas approach that rolls drying machine through insulated piping, from airtight high-temperature flue gas heat-exchange system, pass, heat is delivered on the drying bed, on drying bed, realize mud is added heat drying, the flue gas of finishing after the heat exchange is discharged by the exhanst gas outlet of drying machine, the flue gas of discharging is through heat pipe hot-blast stove or other forms of hot blast heat exchanger rapid cooling, discharge (or feed discharge or squeeze into cesspool after sewage disposal system is handled be dissolved in the sewage) by chimney then after washing, the power of flue gas is provided by air-introduced machine and air blast.
Wet mud is pressed into by screw pump or other forms of dredge pump and rolls the drying machine mud inlet, be extruded into the mud bar or slice drops on the cylinder and scraper of heat exchange bed surface or rotation through the mud nozzle, roll by cylinder (chain drives on bed surface linear running and rotated to traffic direction by the rack-and-pinion constraint).Mud bar that is rolled or slice will be expanded into all thick thin slice and be distributed on the cylinder, the thin slice that is distributed on cylinder is carried with cylinder by cylinder and rotates, when moving to, it is scraped when being the scraper place of tangential arrangement with cylinder, and then rolled and carry by cylinder, form with this and to roll, carry, to scrape the repetition period motion, can stir at random, mix after thin slice is scraped.Closely contact a large amount of fast heat absorptions with bed surface when mud is rolled on the heat exchange flat board, the water vapour that can shed in a large number when leaving bed surface rolls.Steam in the drying machine operating room is discharged through steam outlet by air-introduced machine, and forms negative pressure in the drying machine operating room, and other gases that while mud evaporates are also discharged fast.Thin slice is progressively dry through rolling after heat absorption, the evaporation of a plurality of cycles, and extremely moisture about 60% or during the moisture content of suitable moulding process, brought to mud outlet end by cylinder, fall into sludge hopper.Half-dried mud in the sludge hopper is discharged through the mud mouth rotation around horizontal rotational shaft
The half-dried mud of being discharged by the mud mouth revolving door enters type mud make-up machine and (is spherical, ovum shape or hollow ball-shape by the high-pressure extrusion moulding, can add the lime of some during moulding according to technology), because it possesses higher mechanical strength, can enter type mud and store dryness storehouse continuation drying.
Type mud can enter the type bucket through conveying device when being dried to about moisture 20%-40% (or moisture content of suitable incinerator burning condition) in storing dryness storehouse, via dispenser screening slideway, throw in controller, the muddy and slippery road of type, by the gravity landing or tumble and enter type mud incinerator and burn.The slag major part that the burning back forms is with the profile of maintenance mud, through special reciprocal grate or other the not fire grate of broken its profile discharges as far as possible of incinerator.The igniting of incinerator can be lighted by firewood, moulded coal or burner, also can be by firewood, light a fire through the type mud of air dry.

Claims (4)

1. process for treating dehydrated sludge in sewage treatment plant is characterized in that: comprise that wet mud drying, wet mud moulding, type mud burn, wherein:
(1) wet mud drying: wet mud is extruded into mud bar or slice through the mud nozzle and drops on the cylinder and scraper in the drying machine, roll, carry, scrape the repetition period motion by cylinder, form thin slice and on the drying bed below the cylinder, carry out drying, fall into sludge hopper after the drying, the half-dried mud in the sludge hopper is expelled to type mud make-up machine through the mud mouth rotation;
The high-temperature flue gas that incinerator produces enters the gas approach that rolls drying machine through pipeline, heat is delivered on the drying bed mud is added heat drying, the flue gas of discharge through cooling, washing back by the chimney discharge or squeeze into cesspool and be dissolved in the sewage;
(2) wet mud moulding: the half-dried mud of being discharged by the mud mouth revolving door enters type mud make-up machine by high-pressure extrusion glomeration or ovum shape, enters dryness storehouse and stores also further dry;
(3) type mud burns: type mud can enter the type bucket through conveying device when being dried to the moisture content of moisture 20%-40% or suitable incinerator burning condition in the storing and drying storehouse, throw in controller, type mud input slideway via type mud screening slideway, type mud, enter that formation type mud layer burns on the type mud incineration furnace grate, the body refuse that the burning back forms is discharged by cleanout door.
2. process for treating dehydrated sludge in sewage treatment plant according to claim 1, it is characterized in that: the structure of described drying machine is: comprise vaporization chamber, steam (vapor) outlet, the mud import, drying bed, sludge hopper, drying bed is in vaporization chamber, steam (vapor) outlet is arranged on the top of vaporization chamber, the mud import is arranged on the vaporization chamber of drying bed high-temperature flue gas inlet side top, sludge hopper is arranged on the vaporization chamber of drying bed high-temperature flue gas outlet side below, the inner channel cavity that forms a plurality of high-temperature flue gas of drying bed, operation is equipped with drum assembly on drying bed, the structure of this drum assembly is: the two ends on drying bed are fixed with a pair of drive sprocket and a pair of driven sprocket respectively, all the sealing engagement is equipped with two chains on two pairs of sprocket wheels, between two chains, laterally be evenly equipped with cylinder, on the drying bed between each chain and the cylinder, all be fixed with a spur rack, this spur rack all with the coaxial gear that installs is meshed in the cylinder both sides, all tangentially is fixed with a scraper in the front side of each cylinder.
3. process for treating dehydrated sludge in sewage treatment plant according to claim 1, it is characterized in that: described type mud incinerator comprises combustion chamber, fire grate system, dreg removing system and type mud dosing system, the combustion chamber lower bottom part is equipped with fire grate system, and the fire grate below is a dreg removing system, and concrete structure is:
(1) combustion chamber comprises that body of heater, burner hearth, chimney constitute, and the arch top center is equipped with pyrometer couple for connecting the chimney of high-temperature flue on chimney;
(2) fire grate system is driven by fire grate, fire grate and constitutes, comprise fixed grate and slip fire grate and interval layout, wherein promptly close furnace wall, both sides is fixed grate, be provided with the slip fire grate between the adjacent fixed grate, the slip fire grate can be put in order group or singlely reciprocatingly slide vertically, it is movable handle that the slip fire grate stretches out the outer end of stove, and this activity handle drives its axially-movable of control by the fire grate of outside;
(3) dreg removing system is included in air compartment, body refuse storehouse and the intake stack under the fire grate, hot blast enters air compartment by intake stack, and enter the type mud layer by the fire grate gap, and air compartment's lower opening is also installed able to turn on or off air compartment's baffle plate, and air compartment baffle plate below is the body refuse storehouse;
(4) type mud dosing system is arranged on upper of furnace body, throw in slideway and constitute by type bucket, type mud screening slideway, type mud input controller, type mud, type bucket opening part connecting-type mud screening slideway, type mud screening slideway is a rectangular cavities that tilts to install, the other end connecting-type mud of type mud screening slideway is thrown in controller, type mud is thrown in controller connecting-type mud and is thrown in slideway, type mud is thrown in slideway and is formed for the round steel pipe bending of several internal diameters greater than type mud line degree, and the dispensing port that type mud is thrown in slideway is communicated with body of heater internal furnace and uniform setting around body of heater.
4. process for treating dehydrated sludge in sewage treatment plant according to claim 3 is characterized in that: described fire grate is made of many fishbone steel parts, and the slip fire grate is supported by the high temperature resistant sliding bearing that is fixed in two ends; The top of the intake stack of described dreg removing system is provided with slag trap, and air compartment is a back taper, and air compartment's baffle plate is controlled by air compartment's baffle plate handle; The bottom of described type mud screening slideway is that several round steel rods or steel pipe vertically rearrange, steel rod or steel pipe gap are less than type mud line degree, described controller is to open rectangular opening and the opposite side cylindrical cavity for several circular holes on the lateral column face of a horizontal setting, its rectangular opening connects the screening slideway, and another side circular orifices connecting-type mud is thrown in slideway.
CN2009100697293A 2009-07-15 2009-07-15 Process for treating dehydrated sludge in sewage treatment plant CN101602565B (en)

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CN102192514B (en) * 2011-06-30 2012-08-15 天津市碧奥达思科技有限公司 Oxygen-deficiency pyrolyzing circular sludge incinerator
CN102491617B (en) * 2011-12-13 2013-03-13 史海峰 Surface sludge spreading device for drum dryer
CN102515458A (en) * 2011-12-20 2012-06-27 绍兴文理学院 Sludge drying processing device and technology thereof
CN104803578B (en) * 2015-04-28 2016-08-31 江苏厚水环保技术有限公司 A kind of sludge drying mechanism
CN105972610A (en) * 2016-05-30 2016-09-28 戴道国 Collaborative mixed burning method for large-scale treatment
CN106517392B (en) * 2016-11-30 2019-07-23 广西金穗生态科技股份有限公司 The recycling technique of molasses alcohol waste water
CN108534150B (en) * 2018-04-17 2019-11-26 上海仁创环境科技有限公司 A kind of rotary incinerator and rotation incinerating method

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