CN208829530U - A kind of three energy-efficient rotary drying equipments - Google Patents

Abstract

The utility model provides a kind of three energy-efficient rotary drying equipments, it is related to sludge drying device technical field, including desiccation machine main body, feed system, thermal energy supply system, stocking system, exhaust treatment system and PID control system, desiccation machine main body are formed by inner cylinder, middle cylinder, outer cylinder nesting, and interior tube rear end sets dispersing device, outer cylinder bottom sets support roller, outer cylinder overcoat gear rolling ring；Inner cylinder front end feed inlet sets import wind scoop, feed system is connect with import wind scoop, thermal energy supply system is connect with import wind scoop, outer tube rear end sets out material mouth, discharge port sets out one's intention as revealed in what one says bucket, export wind scoop lower part connect stocking system, top connect exhaust treatment system, PID control system include PID control cabinet, the flue gas monitoring device set on import wind scoop, the thermocouple set on thermal energy supply system, set on outlet wind scoop thermocouple and oxygen content monitoring device.The utility model has structurally reasonable, extension sludge motion path, drying thermal efficiency height, the beneficial effect of obvious energy conservation.

Description

A kind of three energy-efficient rotary drying equipments

Technical field

The utility model relates to sludge drying device technical field, especially a kind of three energy-efficient rotary desiccation Equipment.

Background technique

With the universal of sewage treatment facility, the in-depth of the raising of sewage treating efficiency and sewage treatment degree, domestic city Political affairs sludge yield sharply increases year by year, it is contemplated that arrives the year two thousand twenty, the yield of municipal sludge is up to 90,000,000 tons.It is most of at present dirty The simple process disposition that mud is still filled using dehydration (moisture content 80%) afterwards wastes a large amount of soil, and constitutes to ecological environment It seriously threatens, science, reliable, reasonable processing disposition is carried out to sludge, has become a Xiang Chong of environmental protective measure The emphasis for wanting content and environmental improvement to work.

Sludge components are complicated, contain sex pheromone, parasitic ovum, poisonous and hazardous heavy metal and a large amount of object difficult to degrade Matter is such as dealt with improperly, is easy to cause secondary pollution to environment.According to the difference of sludge quality and moisture content, the country forms five Mainstream technology route: deep dehydration+landfill；Aerobic fermentation+land use；Anaerobic digestion+desiccation+land use；Depth is de- Water+desiccation+burning+recycling；Deep dehydration+desiccation+charing+recycling.

According to the Treatment of Sludge principle and domestic city sewage treatment of " minimizing, innoxious, stabilisation, recycling " The statuses such as factory's subregion is arranged, sludge quantity is big, content of beary metal is exceeded, urban land is nervous, it is contemplated that sludge incineration and charing Technique by be sludge treatment from now on developing direction.According to material balance and Energy Balance Analysis, sludge incineration and charring process The moisture content of import of technique sludge is preferably controlled 30% hereinafter, needing to select scientific, reasonable, efficient dehydration technique technique, control The project equipment comprehensive method of investment and operation cost.

Moisture generally has 4 kinds of existence forms: free water or interstitial water, capillary water, absorption water and internal water in sludge, right Answer different dehydration technique and technique.Secondary sludge (moisture content 99%) and primary sludge (moisture content from sewage treatment plant 97%) it, is down to 80% or so by thickening and centrifugal dehydration treatment moisture content, can be down to after conditioning modification and frame dehydration 55%-65%, moisture is mainly capillary water, absorption water and internal water/combine water in sludge at this time, from dehydration mechanism and UTILIZATION OF VESIDUAL HEAT IN Comprehensive effect, heat drying dewatering process just becomes optimal selection.

Drying process is exactly that a certain number of thermal energy are transmitted to moisture contained by material in the unit time, these moisture by It is vaporized after heat, the process being collected separately with feed separation, the moisture of the material and vaporization that dry out.Sludge drying is set Many different types are had, wherein common type has:

(1) direct-heating type: being introduced directly into drier for high-temperature flue gas, contact by gas with wet stock, to flowing into Row heat exchange, high-efficient, the dewatered sludge solid content height of heat utilization, but the exhaust gas being discharged needs to carry out specially treated.Representative is set Have rotary kiln, fluidized bed etc.；

(2) indirect heating type: by the heat of high-temperature flue gas by heat exchanger, be transmitted to certain medium (conduction oil, steam or Person's air), it is recycled in a closed circuit, and the material mediate contact being dried, by conducting or contacting heating sludge, Heat partially utilized after flue gas normal discharge.For indirect heating manner there are certain heat loss, heat transfer efficiency is low, and moisture steams It is lower to send out efficiency, while because medium temperature is limited, generally should not be used in and the sludge drying of high solid content is required to be dehydrated.Represent equipment There are spiral, disk, thin layer, disk, oar blade type etc.；

(3) heat radiation heated type: being one kind of indirect heating, and heat transfer medium passes through radiation mode heated material, heat transfer effect Rate is lower, and time-consuming for desiccation, is generally used for special material processing.Equipment has belt, spiral etc..

Indirect heating type drying equipment is generally used for the high industry of the material requirements such as chemical industry, pharmacy, sludge treatment industry one As be all made of direct-heating type, wherein it is current domestic sludge incineration and charing process that rotary desiccation machine, which handles high wet mud, Main corollary equipment.Rotary kiln/cartridge type drying equipment has the advantages that production capacity is big, drying time is short, discharging water capacity is low etc., But there is also following problems 1. since equipment is rotation single layer cylinder, surfaces externally and internally is difficult to keep the temperature, and corresponding scattering losses are big, heat Energy utilization rate is lower；Require the high-temperature hot-air/exhaust gas volumn blasted big simultaneously, barrel diameter also corresponding larger, front end charing/burning The hot fume energy of section discharge cannot be met the requirements, and need to increase supplemental heat source；

2. high temperature sky/flue gas is introduced directly into drier by equipment, the contact, convection current by gas with wet stock are changed Heat, thermal energy conversion efficiency is high, but because basket diameter is big, high-temperature flue gas fast speed, reduces overall utilization efficiency of heat energy；

3. main equipment figure is huge, takes up a large area, single set equipment processing capacity is limited.There is equipment to increase in feed zone Add siccative back-mixing system, i.e. wet mud is first mixed with a certain proportion of dry mud before charging, and moisture content is down to 30%~40%, can drop Low sludge caking property and to a certain extent compression device size, but increase the complexity of complete set of equipments, increase equipment investment and fortune Cost is sought, comprehensive benefit is unobvious, actually uses less；

4. evading the gluing phase stage (moisture content 50%-60%) in drying process, and effectively subtract to improve heat exchange efficiency Skinny device size uses high speed comminuting dasher in the middle part of cylinder, but the dust concentration generated is high, and there are risk of explosion, together The consumption of Shi Zengjia electric power energy, comprehensive benefit reduce.Apply in general to the Treatment of Sludge that treating capacity is small, is not required to continuous operation.

Utility model content

The utility model provides a kind of three energy-efficient rotary drying equipments, solves rotary in the prior art Drying equipment has that energy consumption is high, dust concentration is high, takes up a large area, invests the technical problems such as operating cost height.

The utility model is realized in this way including desiccation machine main body, feed system, thermal energy supply system, stocking system, Exhaust treatment system and PID control system；

The desiccation machine main body exterior bottom sets support roller, is formed by three layers of inner cylinder, middle cylinder, outer cylinder cylinder nesting, the inner cylinder, Middle cylinder, outer cylinder axle center be overlapped, inner cylinder front end connect with the outer cylinder front end after to preceding horizontal extension formation feed inlet, the charging Mouth is connect with import wind scoop, and inner cylinder rear portion is connected to middle cylinder rear portion, and middle tube rear end inner face is provided with beating for inside tube inner chamber extension In bulk to set, middle cylinder front is connected to the front of the outer cylinder, and the middle tube rear end sets connecting shaft and the outer tube rear end inner wall connects It connects, the rear end of the outer cylinder sets out material mouth, and the discharge port is connect with outlet wind scoop, the outlet wind scoop upper end and the tail gas Processing system connection, lower end is connect with the stocking system；The inner cylinder, middle cylinder, outer tube inner wall set lifting blade；The support roller is set Transmission gear, the outer drum outer wall set the gear rolling ring being adapted to transmission gear, and the support roller is connect with driving mechanism, the drive Motivation structure includes gearbox, adjustable frequency motor；

The feed system includes feed hopper, the quantitative feeding wind stopping device connecting with the feed hopper bottom end, described quantitative Feeding air-locked valve is connect with the import wind scoop；

The thermal energy supply system includes burner, the combustion chamber connecting with burner output end, the combustion chamber and institute The front end connection of import wind scoop is stated, the combustion chamber sets the first air-introduced machine；

The stocking system includes sequentially connected delivery pipe, screw conveyor, moderate soak feed bin, the delivery pipe with The outlet wind scoop lower part connection；

The PID control system includes PID control cabinet, set on the flue gas monitoring device of import wind scoop, is set to thermal energy and supplies The thermocouple of system, set on the thermocouple and oxygen content monitoring device of outlet wind scoop.

Embodiment as one preferred, the lifting blade include angular lifting blade and ten thousand word lifting blades.

Embodiment as one preferred, the exhaust treatment system include sequentially connected deduster, caustic wash tower, remove Smelly tower, the second air-introduced machine and exhaust tube, the input terminal of the deduster are connect with the outlet wind scoop.

Embodiment as one preferred, the exhaust tube set exhaust sampling detection mouth.

The junction of embodiment as one preferred, the inner cylinder and the import wind scoop sets sealing ring, described outer The junction of cylinder and the outlet wind scoop sets sealing ring.

Embodiment as one preferred, the Inner Wall of Combustion Chamber are set up defences firebrick, and outer wall sets insulating layer.

Embodiment as one preferred, the inner cylinder use high temperature resistant shell plate, and the outer cylinder, middle cylinder use carbon steel Plate.

Front end/rear end of embodiment as one preferred, the deduster sets heat-exchanger rig.

Utility model works principle: pid control parameter is arranged according to test/previous operating experience.Start burner and First air-introduced machine, when flue-gas temperature > 600 DEG C in burner start to feed intake when exporting wind scoop temperature > 120 DEG C；Material is from charging System enters inner cylinder, is rapidly heated with hot fume heat convection so that material parts surface water evaporation, under lifting blade effect into Enter the evaporating area i.e. back segment of inner cylinder, is further crushed by dispersing device, sheds acceleration evaporation；Cylinder and outer cylinder are formed in material entrance Freeze-day with constant temperature area, low lift lifting blade effect under, be successively heat exchanged by hot gas, barrel and own temperature, material is more Add uniformly and temperature is made to be kept for > 80 DEG C, vapor is avoided to condense；Material overall moisture content be reduced to 30% or less after through discharge end Discharge, screw conveyor are sent to moderate soak feed bin；Moisture in sludge is changed into vapor by liquid and steams through thermal energy exchange It issuing, is mixed to form exhaust gas with flue gas, quickly extracted out under hot pressing and the effect of the second air-introduced machine, wind speed is 2 ~ 3m ∕ s, It is discharged after deduster dedusting, caustic wash tower alkali neutralization, deodorizing tower deodorization by exhaust tube 15；It is each by the adjustment of PID control cabinet Control parameter locks after reaching stable operation.PID system may be incorporated into PLC system, be monitored operation.PID control system combines Sludge characteristics and seasonal variations adjust in due course；It shuts down: stopping closing import when charging → closing burner → import flue gas < 50 DEG C First air-introduced machine → closing exhaust treatment system → closing tail gas discharge system the second air-introduced machine → system-down at end.

The utility model has the beneficial effects that it is scientific and reasonable for structure, dryer thermal efficiency is high, energy-saving effect is significant.Sludge exists Inner cylinder and thermal current complete sludge pre-heating temperature elevation and part are evaporated with convection current, conductive form progress heat exchange；Sludge in, it is outer Cylinder heat exchange is to conduct, convection current, forms of radiation are used in combination, predominantly freeze-day with constant temperature area.Through detecting, the thermal efficiency is more than traditional dryer 40% or so level, energy-saving effect are significant；Relative to monotubular drying equipment, in three desiccation machines the motion path of sludge and The time of contact of sludge and hot fume extends nearly three times, effectively improves single set equipment processing capacity, reduces equipment size, improves The flexibility of system design and the adaptability in place；Three layers of cylinder of three desiccation machines are mutually nested, itself form a heat preservation System, external surface area reduce 30% or more than monotubular rotary dryer, and outer barrel surface temperature is low, and heat loss is few, is efficiently saving While energy, production environment and working condition are substantially improved；Three barrel structure desiccation machines correspond to the spy of sludge drying three phases Point design, the thermal efficiency is high, and heat loss is low, corresponding to reduce external heat supply requirement, under normal operating conditions, charing/burning The waste heat of generation can meet the needs of desiccation, reduce operation cost；A variety of lifting blade designs, angular lifting blade and ten thousand word liftings The combination of plate exchanges sludge with hot fume more abundant, reduces in drier body the mechanism of " wind-tunnel " generation.It is interior Cylinder end setting dispersing device can be crushed, dispersed material, reduce materials from bonding；Complete machine horizontal arrangement is compact.Using support Wheel bearing, eliminates big pinion drive, and instead support roller is driven, and equipment is easy for installation, easy to operate, stable；Simultaneously Drum speed is adjusted flexibly, meets total system according to machine material quantity, moisture content and product requirement is entered using frequency control PLC control requires；It is applied widely using material and thermal current fair current stoving process.It can be widely used for clay, coal, slag, iron The drying of the various raw material such as powder is also applied for the drying of the various bulk materials of the departments such as metallurgy, chemical industry.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, it is also possible to obtain other drawings based on these drawings.

Fig. 1 is the overall structure diagram of embodiment 1.

Mark: 1-feed hopper；2-quantitative feeding wind stopping devices；3-flue gas monitoring devices；4-the first air-introduced machine；5-heat Galvanic couple；6-gear rolling rings；7-outer cylinders；8-inner cylinders；9-middle cylinders；10-oxygen content monitoring devices；11-dedusters；12-alkali Wash tower；13-deodorizing towers；14-the second air-introduced machine；15-exhaust tubes；16-outlet wind scoops；17-screw conveyors；In 18- Between keep the temperature feed bin；19-transmission gears；20-lifting blades；21-dispersing devices；22-driving mechanisms；23-support rollers；24-is close Seal；25-import wind scoops；26-combustion chambers；27-burners；28-exhaust sampling detection mouths；29-PID control cabinets.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts Every other embodiment obtained, fall within the protection scope of the utility model.

Embodiment 1

Refering to attached drawing 1, a kind of three energy-efficient rotary drying equipments, including desiccation machine main body, feed system, heat It can supply system, stocking system, exhaust treatment system and PID control system；

Refering to attached drawing 1, the desiccation machine main body be it is horizontal positioned, the desiccation machine main body exterior bottom sets support roller 23.Institute Stating desiccation machine main body is three layers of barrel structure, is formed by 7 three layers of inner cylinder 8, middle cylinder 9, outer cylinder cylinder nesting, 8 front end of inner cylinder and institute After stating the connection of 7 front end of outer cylinder, outer cylinder 7 is extended horizontally forward out, forms feed pipe, the front end of the feed pipe is opening, described Opening is used as feed inlet, and the junction that the inner cylinder 8 is with the outer cylinder 7 is sealed connection, and the feed inlet front end is connected with Import wind scoop 25.9 rear end of middle cylinder is connect by connecting shaft with 7 rear end of outer cylinder, the inner cylinder 8, middle cylinder 9,7 axis of outer cylinder The heart is overlapped, and 8 rear portion of inner cylinder is connected to middle 9 rear portion of cylinder, and middle 9 front of cylinder is connected to 7 front of outer cylinder, described The lifting blade 20 that outer cylinder 7, inner cylinder 8,9 inner wall of middle cylinder arrange between being all provided with etc., sludge is raised, be crushed, is fed forward, can be selected low Lift lifting blade.The lifting blade 20 includes ten thousand word lifting blades and two kinds of angular lifting blade.8 rear portion of inner cylinder and middle 9 rear portion of cylinder connect It is logical, it is provided with the horizontal-extending dispersing device of cavity direction into inner cylinder 8 after middle cylinder 9, dispersing device can be crushed, dispersed material, subtract Few materials from bonding.After sludge enters desiccation machine main body by feed inlet, under the rotary action of lifting blade 20 and three layers of cylinder, road is moved Diameter is inner cylinder 8-9-outer cylinder of middle cylinder 7, and inner cylinder 8 is used as heating zone+evaporating area, and leading portion is heating zone, and heating zone can also be referred to as For preheating zone, 8 back segment of inner cylinder is evaporating area, and middle cylinder 9 is then freeze-day with constant temperature area with outer cylinder 7.The inner cylinder 8 uses high temperature resistant boiler Plate, the outer cylinder 7, middle cylinder 9 use carbon steel sheet.

Refering to attached drawing 1, level extends rearwardly to form discharge nozzle at the back-end central of the outer cylinder 7, the sludge warp in outer cylinder 7 Discharge nozzle discharge is crossed, the output end of the discharge nozzle is as discharge port, and the discharge port is connect with outlet wind scoop 16, the outlet 16 upper end of wind scoop is connect with the exhaust treatment system, and lower end is connect with the stocking system, is equipped in the outlet wind scoop 16 Outlet wind scoop 16, the intracorporal temperature of desiccation machine master can be monitored in real time in thermocouple 5, thermocouple 15；7 bottom surface of outer cylinder sets two Symmetrical support roller 23 supports, and the support roller 23 is equipped with transmission gear 19, sets two circles outside outer cylinder 7 and is adapted to transmission gear 19 Gear rolling ring 6, the support roller 23 connect with driving mechanism 22, and the driving mechanism 22 includes gearbox, adjustable frequency motor, institute It states adjustable frequency motor to connect with the adjustable frequency motor, the adjustable frequency motor is connect with the support roller 23, the variable-frequency electric Machine drives the transmission gear 19 on support roller 23 to rotate by gearbox, and transmission gear 19 is engaged with gear rolling ring 6, drives outside being set to The gear rolling ring 6 of 7 outer walls of cylinder rotates, and outer cylinder 7 starts turning because three layers of cylinder are nested setting, the middle cylinder 9, inner cylinder 8 with The outer cylinder 7 connects, so that three layers of cylinder be driven to rotate in the same direction, at the same speed, realizes the dispersing device 21 that middle 9 rear end inner face of cylinder is arranged in It is rotated together with three layers of cylinder.

Refering to attached drawing 1, the feed system includes feed hopper 1, and the quantitative feeding connecting with 1 bottom end of feed hopper closes wind Device 2, the quantitative feeding wind stopping device 2 are connect with the import wind scoop 25, and the quantitative feeding wind stopping device 2 is by quantitative feeding device It is formed with wind stopping device, the controllable sludge quantity into feed hopper of quantitative feeding device；The inner cylinder 8 connects with the import wind scoop 25 The place of connecing sets sealing ring 24, that is, sealing ring 24 is set at feed inlet, and the outer cylinder 7 is equipped with 16 junction of outlet wind scoop Sealing ring 24, that is, sealing ring 24 is set in discharge outlet, outside air inlet is limited, control desiccation machine body interior is oxygen-containing Amount.

Refering to attached drawing 1, the thermal energy supply system includes burner 27, the combustion chamber connecting with 27 output end of burner 26, the combustion chamber 26 is connect with the front end of the import wind scoop 25, and the combustion chamber 26 sets the first air-introduced machine 4；Combustion chamber 26 Inner wall is set up defences firebrick, and outer wall sets insulating layer；Combustion chamber 26 is set to adapt to different production environments.Thermoelectricity is equipped in combustion chamber 26 Even 5, the directly indoor temperature of measurement burning.More than the high temperature that rear end can be utilized to generate when matching with burning and carbonization device Hot fume only need to just start supplement fuel burner 27 when booting preheating or waste heat supply temperature/thermal energy are not able to satisfy desiccation requirement, Mixing, regulation are played the role of in combustion chamber 26 at this time；When no external waste heat utilizes, combustion chamber 26 is exactly a combustion furnace, can Desiccation thermal energy is provided using natural gas, oil, biomass fuel.

Refering to attached drawing 1, the stocking system includes sequentially connected delivery pipe, screw conveyor 17, moderate soak feed bin 18, the delivery pipe is connect with 16 lower part of outlet wind scoop.

Refering to attached drawing 1, the PID control system includes PID control cabinet 29, set on the flue gas monitoring device of import wind scoop 25 3, set on the thermocouple 5 of thermal energy supply system, set on the thermocouple 5 and oxygen content monitoring device 10 of outlet wind scoop 16.Flue gas prison It surveys device 3 and uses the prior art, the oxygen content of flue gas, flow are monitored, and feed data back to PID control cabinet 29.Contain Oxygen amount monitoring device 10 uses the prior art, carries out real-time monitoring to the intracorporal oxygen content of desiccation machine master, configures PID control cabinet 29, acquire sludge temperature and control point temperature, oxygen content, each power motor revolving speed, air inducing in treating capacity, hot fume flow, machine The operating parameters such as machine running frequency, the supplement energy, real-time monitoring production run and supplement energy consumption, reach efficient, stable, section Energy, safety；It integrally networks with project simultaneously, system control.

Refering to attached drawing 1, the exhaust treatment system includes sequentially connected deduster 11, caustic wash tower 12, deodorizing tower 13, Two air-introduced machines 14 and exhaust tube 15, the input terminal of the deduster 11 are connect with the outlet wind scoop 16.The exhaust tube 15 is set Exhaust sampling detection mouth 28.Exhaust sampling detection mouth 28 can be used as manual sampling detection mouth, and the tail of discharge is understood convenient for user Gas situation.To make full use of tail gas heat content, it can increase in the front end of deduster 11/rear end installation heat-exchanger rig, realize part heat It can recycle.

The present embodiment is controlled swapace, it is long that three layers of cylinder extend as far as possible sludge drying is arranged using comprehensive heat exchange mode Degree, the mixed flue gas temperature in freeze-day with constant temperature area should be controlled at 150-300 DEG C or so.Sludge temperature improves after heat drying is handled To 80 DEG C or more, moisture content is typically reduced to 30% hereinafter, the exhaust gas temperature of discharge is controlled at 110 DEG C or more.

Oxygen content, dust and particle temperature control principle: on fire in old-fashioned drier or explosion is quite frequent, enables sludge The security performance of drying equipment is by query.Tested and analyzed, with the related principal element of exploding be oxygen content, dust and Grain temperature, it is necessary to the security factor of control are as follows: oxygen content < 12%, dust concentration < 60g/m3, particle temperature < 110 DEG C, this hair Bright technology takes the corollary equipment below for property:

(1) oxygen content is controlled:

Heat source control --- control fuel/pyrolysis gas combustion air coefficient of excess reduces under the premise of meeting full combustion The oxygen content of hot fume；

Equipment and process control --- sewage sludge feed end sets wind stopping device, realizes tiny structure in three layers of cylinder, control oxygen it is unordered into Enter；

Real-time monitoring --- setting oxygen content monitoring device, to the exceeded protection of oxygen, when oxygen content is more than 10%, desiccation is set It is standby to be automatically stopped charging；

(2) control particle temperature: the control key of temperature is to control residence time of the sludge in desiccation machine, it is necessary to protect Suitable moisture in dry mud is held, moisture content > 10% is enabled, is burnt to avoid sludge overheat.With the drying equipment of the present embodiment, After carrying out sludge drying, moisture percentage in sewage sludge>20%, sludge temperature<100 DEG C of discharge can evade such risk；

(3) control dust concentration: the design is only arranged in 8 rear end of inner cylinder low according to the mechanism of three sections of processes of sludge drying Fast dispersing device 21 lengthens freeze-day with constant temperature area, greatly reduces the generation of dust.

Utility model works principle: pid control parameter is arranged according to test/previous operating experience.Start burner 27 Start to feed intake when flue-gas temperature > 600 DEG C in burner 27, outlet 16 temperature > 120 DEG C of wind scoop with the first air-introduced machine 4；Material Enter inner cylinder 8 from feed system, is rapidly heated with hot fume heat convection, so that material parts surface water evaporation, in lifting blade Effect is lower to enter evaporating area, is further crushed by dispersing device, sheds acceleration evaporation；7 shape of cylinder 9 and outer cylinder in material sequence entrance At freeze-day with constant temperature area, low lift lifting blade effect under, be successively heat exchanged by hot gas, barrel and own temperature, material It is more uniform and temperature is made to be kept for > 80 DEG C, avoid vapor from condensing；Sludge overall moisture content be reduced to 30% or less after through exporting Wind scoop discharge, screw conveyor are sent to moderate soak feed bin 18；Moisture in sludge is changed into water by liquid through thermal energy exchange Evaporation of vapours comes out, and is mixed to form exhaust gas with flue gas, is quickly extracted out under hot pressing and air-introduced machine effect, wind speed is 2 ~ 3m ∕ S passes through 15 low-altitude discharged of exhaust tube after 11 dedusting of deduster, 12 alkali neutralization of caustic wash tower, 13 deodorization of deodorizing tower；Pass through PID Control cabinet 29 adjusts each control parameter, locks after reaching stable operation.PID system may be incorporated into PLC system, be monitored operation. PID control system combination sludge characteristics and seasonal variations adjust in due course；It shuts down: stopping charging → closing burner 27 → import cigarette First air-introduced machine 4 → closing exhaust treatment system → closing tail gas discharge system second that input end is closed when gas < 50 DEG C draws 14 → system-down of blower.

The utility model has the beneficial effects that it is scientific and reasonable for structure, dryer thermal efficiency is high, energy-saving effect is significant.Sludge exists Inner cylinder 8 and thermal current complete sludge pre-heating temperature elevation and part are evaporated with convection current, conductive form progress heat exchange；Sludge in, it is outer 7 heat exchanges of cylinder are to conduct, convection current, forms of radiation are used in combination, predominantly freeze-day with constant temperature area.Through detecting, the thermal efficiency is more than tradition drying The level of machine 40% or so, energy-saving effect are significant；Relative to monotubular drying equipment, in three desiccation machines the motion path of sludge with And the time of contact of sludge and hot fume extends nearly three times, effectively improves single set equipment processing capacity, reduces equipment size, mentions The flexibility of high system design and the adaptability in place；Three layers of cylinder of three desiccation machines are mutually nested, itself form a guarantor Warm system, external surface area reduce 30% or more than monotubular rotary dryer, and 7 surface temperature of outer cylinder is low, and heat loss is few, in height While effect energy conservation, production environment and working condition are substantially improved；Three barrel structure desiccation machines correspond to sludge drying three phases The characteristics of design, the thermal efficiency is high, and heat loss is low, corresponding to reduce external heat supply requirement, under normal operating conditions, charing/ The needs of desiccation can be met by burning the waste heat generated, reduce operation cost；A variety of lifting blade designs, angular lifting blade and ten thousand words The combination of lifting blade exchanges sludge with hot fume more abundant, reduces in drier body the machine of " wind-tunnel " generation Reason.8 end of inner cylinder setting dispersing device can be crushed, dispersed material, reduce materials from bonding；Complete machine is horizontally disposed, compact-sized. It is supported using support roller 23, eliminates big pinion drive, instead support roller 23 is driven, and equipment is easy for installation, easy to operate, operation Stablize；Drum speed is adjusted flexibly according to machine material quantity, moisture content and product requirement is entered using frequency control simultaneously, is met Total system PLC control requires；It is applied widely using material and thermal current fair current stoving process.Can be widely used for clay, The drying of the various raw material such as coal, slag, iron powder is also applied for the drying of the various bulk materials of the departments such as metallurgy, chemical industry.

The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model Protection scope within.

Claims (8)

1. a kind of three energy-efficient rotary drying equipments, which is characterized in that including desiccation machine main body, feed system, heat It can supply system, stocking system, exhaust treatment system and PID control system；

The desiccation machine main body exterior bottom sets support roller (23), is formed by (7) three layers of inner cylinder (8), middle cylinder (9), outer cylinder cylinder nesting, The inner cylinder (8), middle cylinder (9), outer cylinder (7) axle center are overlapped, Xiang Qianshui after inner cylinder (8) front end is connect with the outer cylinder (7) front end Flat to extend to form feed inlet, the feed inlet is connect with import wind scoop (25), and inner cylinder (8) rear portion is connected to middle cylinder (9) rear portion, in Cylinder (9) rear end inner face is provided with the dispersing device extended to inner cylinder (8) inner cavity, the front of middle cylinder (9) front and the outer cylinder (7) Connection, middle cylinder (9) rear end set connecting shaft and connect with the outer cylinder (7) rear end inner wall, and the rear end of the outer cylinder (7) sets out material Mouthful, the discharge port connection outlet wind scoop (16), the outlet wind scoop (16) upper end is connect with the exhaust treatment system, lower end It is connect with the stocking system；The inner cylinder (8), middle cylinder (9), outer cylinder (7) inner wall set lifting blade (20)；The support roller (23) sets Transmission gear (19), outer cylinder (7) outer wall set the gear rolling ring (6) being adapted to transmission gear (19), the support roller (23) with Driving mechanism (22) connection, the driving mechanism (22) includes gearbox, adjustable frequency motor；

The feed system includes feed hopper (1), the quantitative feeding wind stopping device (2) connecting with the feed hopper (1) bottom end, described Quantitative feeding wind stopping device (2) is connect with the import wind scoop (25)；

The thermal energy supply system includes burner (27), the combustion chamber (26) connecting with burner (27) output end, the combustion It burns room (26) to connect with the front end of the import wind scoop (25), the combustion chamber (26) sets the first air-introduced machine (4)；

The stocking system includes sequentially connected delivery pipe, screw conveyor (17), moderate soak feed bin (18), the conveying Pipe is connect with outlet wind scoop (16) lower part；

The PID control system includes PID control cabinet (29), is set to the flue gas monitoring device (3) of import wind scoop (25), is set to heat The thermocouple (5) of energy supply system is set to thermocouple (5) and oxygen content monitoring device (10) of outlet wind scoop (16).

2. three energy-efficient rotary drying equipments of one kind according to claim 1, which is characterized in that the lifting Plate (20) includes angular lifting blade and ten thousand word lifting blades.

3. three energy-efficient rotary drying equipments of one kind according to claim 1, which is characterized in that the tail gas Processing system includes sequentially connected deduster (11), caustic wash tower (12), deodorizing tower (13), the second air-introduced machine (14) and exhaust tube (15), the input terminal of the deduster (11) is connect with the outlet wind scoop (16).

4. three energy-efficient rotary drying equipments of one kind according to claim 3, which is characterized in that the exhaust Cylinder (15) sets exhaust sampling detection mouth (28).

5. three energy-efficient rotary drying equipments of one kind according to any one of claims 1-4, feature exist In the inner cylinder (8) and import wind scoop (25) junction are set sealing ring (24), the outer cylinder (7) and the outlet wind scoop (16) junction sets sealing ring (24).

6. three energy-efficient rotary drying equipments of one kind according to claim 5, which is characterized in that the burning Room (26) inner wall is set up defences firebrick, and outer wall sets insulating layer.

7. three energy-efficient rotary drying equipments of one kind according to claim 6, which is characterized in that the inner cylinder (8) high temperature resistant shell plate is used, the outer cylinder (7), middle cylinder (9) use carbon steel sheet.

8. three energy-efficient rotary drying equipments of one kind according to claim 7, which is characterized in that the dedusting Front end/rear end of device (11) sets heat-exchanger rig.