CN207091260U - The system of continuous processing domestic sludge - Google Patents
The system of continuous processing domestic sludge Download PDFInfo
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- CN207091260U CN207091260U CN201720771659.6U CN201720771659U CN207091260U CN 207091260 U CN207091260 U CN 207091260U CN 201720771659 U CN201720771659 U CN 201720771659U CN 207091260 U CN207091260 U CN 207091260U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/40—Valorisation of by-products of wastewater, sewage or sludge processing
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Abstract
The utility model discloses the system of continuous processing domestic sludge, including：Spiral drying charring furnace and revolving bed pyrolysis oven, spiral drying charring furnace body one end has domestic sludge entrance, the other end has charing sludge outlet, body interior edge domestic sludge entrance to the side for carbonizing sludge outlet is upwardly formed feed zone, one-level dry section, secondary drying area, carbide and material discharge region, dry sections at different levels are respectively arranged with burner and steam outlet, and char zone exports with combustible gas, material discharge region is with exhanst gas outlet；The auger conveyor of spiral drying charring furnace is set in body interior edge domestic sludge entrance to the direction for carbonizing sludge outlet；Revolving bed pyrolysis oven has charing sludge inlet, pyrolysis oil gas vent and solid residue outlet, and radiant tube is provided with revolving bed pyrolysis oven.The system first passes through carries out predrainage to domestic sludge, is remarkably improved pyrolysis of oil and gas products matter, reduces Oil-gas Separation cost, and equipment is continuously stable, and the thermal efficiency is high, and economic benefit is obvious.
Description
Technical field
Environmental energy field is the utility model is related to, specifically, the utility model is related to continuous processing domestic sludge
System.
Background technology
Domestic sludge and other sticky carbonaceous materials (such as oil field oiliness sludge, mud containing mine dust, industrial sludge, dangerous waste liquid)
Thermochemical study (as carbonization, pyrolysis, gasification) solid-state, liquid and gaseous products can be produced, these products are made on demand can
The energy form for reclaiming, easily utilize, easily transporting and easily store, can heat supply generating or the raw material as chemical industry and other industries.Root
According to raw material is different and the difference of heat treatment purpose, carbonization, gasification, pyrolysis, liquefaction or other related heat chemistrys can be used anti-
Should and technique.
It is many to be pyrolyzed the reactor types used, such as moving bed, fixed bed, fluid bed, ablation bed, shower furnace and rotary kiln
Deng wherein industrial production is based on moving bed, fixed bed, rotary kiln and fluid bed.Various pyrolysis ways typically have its specific
Purpose, i.e., mainly recovery thermal decomposition product in a certain two kinds of main matters.
Moving bed pyrolysis technique belongs to slow pyrolysis process.The pyrolytic technique can reduce the secondary counter of pyrolysis intermediate product
Should, so as to improve the yield of pyrolysis oil；Low pressure advantageously reduces the carbonaceous residue adhered on pyrolytic carbon, so as to improve its conduct
The possibility that carbon black is reused；Light naphtha and aromatic content are higher in pyrolysis oil, both improve economy, again
Be advantageous to improve the octane number of fuel oil；Bulk damaged tire can be handled and be not required to remove steel wire and fiber cord.Shortcoming is pyrolysis
The heat-supplying mode of stove is external-heat, and heat transfer efficiency is relatively low, and whole system can not operate at full capacity.
Fluidized bed pyrolysis technique belongs to fast pyrolysis process, and feature is that the rate of heat addition is fast, is swift in response, the gas phase residence time
It is short, therefore efficiency of utilization is high, while the generation of secondary response can be reduced, pyrolysis oily yield is higher.In material pyrolytic process
In sulphided state, cause dustiness in pyrolytic behavior high, it is difficult.
Ablation bed pyrolytic process is by reaction mass and scorching hot metal surface direct contact heat transfer, is brought rapidly up material
And crack.Pyrolysis time is short, and reaction speed is fast, can obtain higher oil yield.The continuity of material pyrolysis can not be realized, only
Batch batch (-type) pyrolysis can be carried out.
Rotary kiln pyrogenation technique have to waste material form, shape and size wide adaptability the characteristics of, be suitable for almost
Any solid waste material, size almost no requirement (NR) is fed to damaged tire, belongs to slow pyrolysis process.It is and aqueous higher to oil-containing
Material, if sludge, greasy filth class are because having toughness, directly it can not be pyrolyzed using which.
Conventional fixed-bed pyrolysis system is batch feed, it is impossible to long-term continuous operation, and also pyrolytical condition is not easy to protect for a long time
Hold.
Therefore, the means of existing processing domestic sludge still have much room for improvement.
Utility model content
The utility model is intended to one of technical problem at least solving in correlation technique to a certain extent.Therefore, this reality
It is the system of proposition continuous processing domestic sludge with a new purpose.The system to pending domestic sludge by carrying out
Predrainage, the quality of pyrolysis oil gas can be significantly improved, reduce Oil-gas Separation cost, and the continuous stable and reliable operation of equipment, heat
Efficiency high, economic benefit are obvious.
In one side of the present utility model, the utility model proposes a kind of system of continuous processing domestic sludge, root
According to embodiment of the present utility model, the system includes：
Spiral drying charring furnace, the spiral drying charring furnace include：
Body, one end of the body have domestic sludge entrance, and the other end, which has, carbonizes sludge outlet, in the body
Feed zone, one-level dry section, two level are sequentially formed with along the domestic sludge entrance to the direction of the charing sludge outlet
Dry section, char zone and material discharge region, the one-level dry section, the secondary drying area and the char zone are respectively arranged with burning
Device, the one-level dry section and the secondary drying area have steam outlet, and the char zone has combustible gas outlet, described
Material discharge region has exhanst gas outlet；
Auger conveyor, the auger conveyor are in the body and dirty along the domestic sludge entrance to the charing
The side of mud outlet is set up；
Revolving bed pyrolysis oven, the revolving bed pyrolysis oven have charing sludge inlet, pyrolysis oil gas vent and solid residue
Export, radiant tube is provided with the revolving bed pyrolysis oven, the charing sludge inlet is connected with the charing sludge outlet；
Oil gas cooling and purifying unit, the oil gas cooling and purifying unit have oil gas entrance, pyrolysis oil export and purified gas
Outlet, the oil gas entrance are connected with the pyrolysis oil gas vent, the clean gas outlet combustion gas with the burner respectively
Entrance is connected with the fuel gas inlet of the radiant tube.
According to the system of the continuous processing domestic sludge of the utility model embodiment by the way that pending domestic sludge is supplied
To spiral drying charring furnace, under the propulsion of spiral drying charring furnace auger conveyor, pending domestic sludge passes through successively
Feed zone, one-level dry section, secondary drying area, char zone, and the burner combustion by being set in dry sections at different levels produces heat
Dehydration is dried to pending domestic sludge in flue gas, and is carbonized in char zone, obtains carbonizing sludge, combustible gas and water steaming
Gas, wherein charing sludge is discharged by material discharge region, vapor is discharged by steam outlet, and combustible gas is exported by the combustible gas of char zone
Discharge, heat smoke caused by burner combustion is after completing to the drying and dehydrating of domestic sludge and charing, by the flue gas of material discharge region
Outlet discharge, vapor pass through recyclable condensed water after heat exchange；And then carbonize sludge and be pyrolyzed into revolving bed pyrolysis oven,
To obtain being pyrolyzed oil gas and solid residue；Because pending domestic sludge completes drying and dehydrating and charing before being pyrolyzed,
The pyrolysis oil being pyrolyzed in oil gas directly can be condensed recovery by pyrolysis oil gas caused by pyrolysis using the oily type of cooling, so as to avoid
Processing caused by water content is too high in pyrolysis oil gas is difficult and the problem of cost is high, and by predrainage can avoid being pyrolyzed
Vapor expends radiation tubular heat in journey, and the pyrolysis oil for avoiding vapor from being obtained with pyrolysis is reacted, so as to further improve heat
Solve the yield and quality of oil.And then the pyrolysis oil gas that can be pyrolyzed domestic sludge to obtain is cooled down and purified treatment, will
The purified gas arrived is as burner and the fuel of radiant tube, so as to further improve heat utilization efficiency.Thus, the system by using
Spiral drying charring furnace carries out dehydration carbonization in advance to pending domestic sludge, significantly improves the quality of pyrolysis oil gas, and drops
Low Oil-gas Separation cost, and the continuous stable and reliable operation of equipment, the thermal efficiency is high, and economic benefit is obvious.
Optional, further comprise seal area between the secondary drying area and char zone, in the seal area
Helical blade is not provided with the rotating shaft of auger conveyor.
Optional, the body is cylindrical, and the seal area is located at the body downstream and in the body length side
Area segments at upward 1/2~2/3.
Optional, the pitch of the auger conveyor blade is gradually reduced on domestic sludge conveying direction.Thus, may be used
Further to improve the efficiency that auger conveyor conveys pending domestic sludge.
Optional, the spiral drying charring furnace further comprises：Screen pack, the screen pack are arranged on the charging
In area, the one-level dry section and the secondary drying area, and positioned at the lower section of the auger conveyor.
Optional, the spiral drying charring furnace further comprises：Steam lead, the steam lead are arranged on described one
In level dry section and the secondary drying area, the steam lead is provided with multiple steam entries, and the steam lead goes out
Mouth end connects with the exhanst gas outlet of the material discharge region.Thus, it is possible to the water for being dried to obtain domestic sludge using steam lead is steamed
Gas is collected and exchanged heat, and collects condensed water.
Optional, the combustible gas outlet of the char zone is connected with the fuel gas inlet of the burner.Thus, it is possible to utilize
Fuel of the combustible gas that domestic sludge carbonizes to obtain as burner, so as to further improve the utilization rate of resource.
Additional aspect and advantage of the present utility model will be set forth in part in the description, partly by from following description
In become obvious, or by it is of the present utility model practice recognize.
Brief description of the drawings
Of the present utility model above-mentioned and/or additional aspect and advantage will in the description from combination accompanying drawings below to embodiment
Become obvious and be readily appreciated that, wherein：
Fig. 1 is the system structure diagram according to the continuous processing domestic sludge of the utility model one embodiment；
Fig. 2 is the side using the system processing domestic sludge of the continuous processing domestic sludge of the utility model one embodiment
Method schematic flow sheet.
Embodiment
Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginseng
The embodiment for examining accompanying drawing description is exemplary, it is intended to for explaining the utility model, and it is not intended that to the utility model
Limitation.
In description of the present utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width
Degree ", " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer ",
The orientation or position relationship of the instruction such as " axial direction ", " radial direction ", " circumference " are based on orientation shown in the drawings or position relationship, are only
Described for the ease of description the utility model and simplifying, rather than instruction or imply signified device or element must have it is specific
Orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.
In addition, term " first ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that instruction or implying phase
To importance or the implicit quantity for indicating indicated technical characteristic.Thus, " first ", " second ", " the 3rd " are defined
At least one this feature can be expressed or be implicitly included to feature.In description of the present utility model, " multiple " are meant that
At least two, such as two, three etc., unless otherwise specifically defined.
In the utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be
Mechanically connect or electrically connect；Can be joined directly together, can also be indirectly connected by intermediary, can be two
The connection of element internal or the interaction relationship of two elements, limited unless otherwise clear and definite.For the common skill of this area
For art personnel, concrete meaning of the above-mentioned term in the utility model can be understood as the case may be.
In the utility model, unless otherwise clearly defined and limited, fisrt feature is "above" or "below" second feature
Can be that the first and second features directly contact, or the first and second features pass through intermediary mediate contact.Moreover, first is special
Sign second feature " on ", " top " and " above " can be fisrt feature directly over second feature or oblique upper, or only
Represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be with
Be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height and be less than second feature.
In one side of the present utility model, the utility model proposes a kind of system of continuous processing domestic sludge, root
According to embodiment of the present utility model, with reference to figure 1, the system includes：Spiral drying charring furnace 100, revolving bed pyrolysis oven 200 and oil
Air cooling clean unit 300.Wherein, spiral drying charring furnace 100 includes：Body 110 and auger conveyor 120.
According to embodiment of the present utility model, there is domestic sludge to enter for one end of the body 110 of spiral drying charring furnace 100
Mouth 111, the other end have charing sludge outlet 112, the interior edge domestic sludge entrance 111 of body 110 to charing sludge outlet 112
Feed zone (not shown in accompanying drawing), one-level dry section (not shown in accompanying drawing), secondary drying area (accompanying drawing are sequentially formed with direction
Not shown in), char zone (not shown in accompanying drawing) and material discharge region (not shown in accompanying drawing), one-level dry section, secondary drying area and
Char zone is respectively arranged with burner 113, and one-level dry section and secondary drying area have steam outlet (not shown in accompanying drawing),
There is combustible gas to export 114 for char zone, and material discharge region has exhanst gas outlet 115.Specifically, the domestic sludge by pretreatment can be with
Enter the body of spiral drying charring furnace by domestic sludge entrance, and in the body successively from feed zone by one-level dry section and
Secondary drying area simultaneously carries out one-level drying and secondary drying respectively, and then is carbonized into char zone, dirty to obtain charing
Mud and combustible gas, and by the charing sludge outlet discharge positioned at material discharge region, can use and be located at spiral drying charring furnace inside spin
The heat smoke that burner combustion above and below conveyer produces 200~480 DEG C is directly supplied pending domestic sludge
Heat, the dry total times carried out at different levels are controlled in 20~80min, raw to obtain the charing sludge that water content is not higher than 3wt%
Vapor caused by volatilization can discharge from the steam outlet that dry sections at different levels are set respectively in sludge living, low caused by charing
Boiling point organic component can be used as combustible gas to be exported by combustible gas and discharge, and flue gas caused by burner can be from positioned at material discharge region
Exhanst gas outlet is discharged, and then vapor and flue gas can be exchanged heat, to reclaim condensed water.Meanwhile burner can be each
Multiple spot arrangement in level dry section, heat utilization efficiency is high, and caused exhaust gas volumn is few, so as to substantially reduce the operation of equipment into
This.
According to embodiment of the present utility model, spiral drying charring furnace is suitable to handle material of different shapes, example
Lump material of such as average grain diameter not higher than 200mm, sheet material of the length and width not higher than 200mm, granular material simultaneously, can be located
The material variety of reason may further include：Domestic sludge, medical waste, chemical engineering sludge, pharmaceutical factory's discarded object, paper mill are discarded
Thing, waste printed circuit board and junked tire, waste plastics, biomass, coal and oil shale etc., for sludge class material, into spiral shell
See to filter in advance to average grain diameter before rotation drying charring furnace and be not higher than 30mm.
According to embodiment of the present utility model, the temperature of above-mentioned one-level drying, secondary drying and charing can be independently
Ground is 80~240 DEG C, and the temperature of one-level drying, secondary drying and charing is gradually incremented by, specifically, one-level dryer section material temperature
Degree is increased to 85 ± 3 DEG C, and secondary drying section temperature of charge is increased to 105 ± 5 DEG C, and charing section temperature of charge is increased to 200 ± 15
℃.Thus, it is possible to ensure that temperature when sludge enters char zone is higher, to volatilize using low-boiling-point organic compound as main component
Combustible gas.
According to a specific embodiment of the present utility model, when equipment brings into operation, fired used in each burner
Material can use the outside natural gas or liquefied gas provided, and fuel can be led to by being arranged on the pressure at the top of spiral drying charring furnace
Wind apparatus is sent into burner, with the pyrolysis of domestic sludge, after obtaining enough pyrolysis oil gas, pyrolysis oil can be used to be gas-cooled
But the purified gas obtained after, purifying is as burner fuel, so as to further improve the utilization rate of resource.
According to specific embodiment of the utility model, with reference to figure 1, further comprise between secondary drying area and char zone close
Area 130 is sealed, helical blade is not provided with the rotating shaft of the auger conveyor of seal area.Specifically, due to the spiral in the region
Conveyer rotating shaft is not provided with helical blade, and the partition wall to form flowing can be accumulated when sludge is delivered to the region, so as to which two level is done
Dry area isolates with char zone, so as to improve the temperature of charge of char zone so that material carbonizes and volatilizes combustible gas.According to this reality
With a new specific embodiment, the length for being not provided with spiraling vane portions rotating shaft can be the 1/8~1/ of rotating shaft total length
5, thus, it is possible to further be beneficial to the formation of seal area partition wall, so as to improve the carbonization effect of sludge.
According to specific embodiment of the utility model, body can with cylindrical, seal area can be located at body downstream and
Area segments at 1/2~2/3 in body length direction, thus, it is possible to further be beneficial to the formation of seal area partition wall, so as to improve
The carbonization effect of sludge.
According to embodiment of the present utility model, auger conveyor 120 is arranged in body 110 and along domestic sludge entrance
111 to charing sludge outlet 112 side set up, specifically, it is filtered to average grain diameter be not higher than 30mm domestic sludge
A pile can be pushed into by first helical blade on auger conveyor after into spiral drying charring furnace body, and in spiral transferring
Send and pass through dry sections at different levels and char zone under the promotion of device successively, under flue gas caused by burner combustion, top layer life
The temperature of sludge can rise to 80~120 DEG C, pass through the helical form heating resisting metal blade for drawing solid welding to be scheduled on auger conveyor axle
Agitation, domestic sludge obtains homogeneous perturbation, and internal layer sludge is overturn to top layer, so that it is guaranteed that domestic sludge is heated evenly, and its
In moisture fully remove, obtain water content be not higher than 3wt% charing sludge.
According to specific embodiment of the utility model, the pitch of auger conveyor blade can be with domestic sludge entrance 111
It is gradually reduced on to the direction of charing sludge outlet 112.Thus, it is possible to further improving auger conveyor conveys pending life
The efficiency of sludge.
According to embodiment of the present utility model, spiral drying charring furnace 100 can further include screen pack, screen pack
It is arranged in feed zone, and positioned at the lower section of auger conveyor.Pass through helix transporting device and spiral drying charring furnace front end
Spiral interacts, and is pressed further by between sludge, and the screen pack set by bottom can go out the moisture filter in sludge,
The moisture content into the sludge of one-level dry section can be made to be down to below 80wt%.
According to embodiment of the present utility model, spiral drying charring furnace 100 can further include steam lead (accompanying drawing
Not shown in), steam lead can be arranged in one-level dry section and secondary drying area, and steam lead is provided with multiple vapor
Entrance, the port of export of steam lead are connected with the exhanst gas outlet 115 of material discharge region.Thus, it is possible to it will be lived using steam lead
Vapor that drying sludge obtains collect and with burner combustion caused by flue gas exchanged heat, and collect condensed water.
According to embodiment of the present utility model, there is revolving bed pyrolysis oven 200 charing sludge inlet 201, pyrolysis oil gas to go out
Mouth 202 and solid residue outlet are provided with radiant tube 210 (not shown in accompanying drawing) in revolving bed pyrolysis oven 200, charing sludge enters
Mouth 201 is connected with charing sludge outlet 112, and revolving bed pyrolysis oven 200 is suitable to by the sludge after drying and dehydrating and charing to enter
Row pyrolysis, to obtain being pyrolyzed oil gas and solid residue.Specifically, whole revolving bed pyrolysis oven uses water seal, charging aperture (charing
Sludge inlet) double spiral seal is used, to ensure that material is pyrolyzed under oxygen-free atmosphere in burner hearth；Revolving bed pyrolysis oven can be with
For ring packing structure or linear pattern sealing structure, burner hearth is internally provided with distribution device, heater (radiant tube) and turned over
Expect device etc., raw material material-homogenating device, so as to which domestic sludge is evenly arranged on drapery panel, cloth are provided with charing sludge inlet
Material thickness can be controlled in 20~200mm, and the time control that revolving bed pyrolysis oven rotates a circle is in 10~45min, on material
Multiple regenerative gas radiant tubes being horizontally mounted are provided between portion and furnace roof and carry out heating pyrolysis for material, in pyrolytic process
Stress control in revolving bed pyrolysis oven is within 10kPa, and with the progress of pyrolysis, the organic volatile matter in material is separated
Go out, obtain being pyrolyzed oil gas and volatile matter content is not higher than 3wt% carbonaceous solids residue, flue gas caused by radiant tube burning is up to standard
Discharge.
According to a specific embodiment of the present utility model, spoke can be controlled according to the ratio of organic component in different material
Penetrate pipe and be warming up to 800~1100 DEG C with 20~60 DEG C/min heating rate.On the other hand, radiant tube can be controlled apart from material
The height of upper surface is 50~100mm, thus, it is possible to while ensureing that radiant tube radiation energy utilization rate is higher, avoids radiating
Pipe contacts with material causes equipment operation abnormal.
According to a specific embodiment of the present utility model, spiral drying charring furnace can be arranged directly on revolving bed pyrolysis
Stove carbonizes the top of sludge inlet, so as to further reduce the floor space of equipment.
According to embodiment of the present utility model, oil gas cooling and purifying unit 300 has oil gas entrance 301 and pyrolysis oil export
302 clean gas outlets 303, oil gas entrance 301 with pyrolysis oil gas vent 202 be connected, clean gas outlet 303 respectively with burner
113 fuel gas inlet (not shown in accompanying drawing) is connected with the fuel gas inlet of radiant tube 210 (not shown in accompanying drawing), and oil gas cooling is net
Change unit 300 and be suitable to the domestic sludge pyrolysis oil gas that is pyrolyzed to obtain and cooled down and purified treatment, to obtain pyrolysis oil and net
Change gas.Because domestic sludge is carrying out that dehydration and charing have been dried before pyrolysis removes into revolving bed pyrolysis oven, it is pyrolyzed
The pyrolysis oil being pyrolyzed in oil gas directly can be condensed recovery by caused pyrolysis oil gas using oil cooled method, so as to avoid using
The problem of water process is difficult and cost is high is pyrolyzed after water cooling, meanwhile, pyrolysis gas can return to spiral after removing sour gas and do
Dry retort and revolving bed pyrolysis oven is used separately as the fuel of burner and radiant tube.
According to embodiment of the present utility model, the combustible gas outlet 114 of char zone can be with the fuel gas inlet of burner 113
It is connected, is used thus, it is possible to which combustible gas is supplied to burner as fuel, so as to further improves the utilization rate of resource.
Thus, according to the system of the continuous processing domestic sludge of the utility model embodiment by by pending domestic sludge
In supply to spiral drying charring furnace, under the propulsion of spiral drying charring furnace auger conveyor, pending domestic sludge is successively
By feed zone, one-level dry section, secondary drying area and char zone, and the burner combustion by being set in dry sections at different levels is produced
Dehydration is dried to pending domestic sludge in heat flue gas, and is carbonized in char zone, obtain carbonize sludge, combustible gas and
Vapor, wherein charing sludge discharged by material discharge region, vapor is discharged by steam outlet, combustible gas by char zone combustible gas
Outlet discharge, heat smoke caused by burner combustion is after completing to the drying and dehydrating of domestic sludge and charing, by material discharge region
Exhanst gas outlet is discharged, and vapor passes through recyclable condensed water after heat exchange；And then carbonize sludge and enter revolving bed pyrolysis oven progress heat
Solution, to obtain being pyrolyzed oil gas and solid residue；Because pending domestic sludge completes drying and dehydrating and charcoal before being pyrolyzed
Change, the pyrolysis oil condensation recovery that pyrolysis oil gas caused by pyrolysis will directly can be pyrolyzed in oil gas using the oily type of cooling, so as to
Avoid caused by water content is too high in pyrolysis oil gas and handle the problem of difficult and cost is high, and heat can be avoided by predrainage
Vapor expends radiation tubular heat in solution preocess, and the pyrolysis oil for avoiding vapor from being obtained with pyrolysis is reacted, so as to further carry
The yield and quality of high pyrolysis oil, pyrolysis gas can return after removing sour gas is used as burner and radiant tube fuel.By
This, the system carries out dehydration carbonization in advance by using spiral drying charring furnace to pending domestic sludge, significantly improves heat
The quality of oil gas is solved, and reduces Oil-gas Separation cost, and the continuous stable and reliable operation of equipment, the thermal efficiency is high, and economic benefit is bright
It is aobvious.
In order to facilitate understanding, it is to the continuous processing domestic sludge using the utility model embodiment below with reference to Fig. 2
The method of system processing domestic sludge is described in detail.According to embodiment of the present utility model, this method includes：
S100：Drying and dehydrating and charing
In the step, by domestic sludge continuous conveying to spiral drying charring furnace, and under the propulsion of auger conveyor
Dry one-level, secondary drying and charing are carried out successively, to obtain carbonizing sludge and to produce vapor and combustible gas.
According to embodiment of the present utility model, spiral drying charring furnace includes body and auger conveyor.
One end of the body of spiral drying charring furnace has domestic sludge entrance, and the other end has charing sludge outlet, this
In vivo feed zone, one-level dry section, secondary drying are sequentially formed with along domestic sludge entrance to the direction for carbonizing sludge outlet
Area, char zone and material discharge region, one-level dry section, secondary drying area and char zone are respectively arranged with burner, one-level dry section and
Secondary drying area has steam outlet, and char zone has combustible gas outlet, and material discharge region has exhanst gas outlet.Specifically, by
The domestic sludge of pretreatment can be entered the body of spiral drying charring furnace by domestic sludge entrance, and in the body successively from entering
Area is expected by one-level dry section and secondary drying area and carries out one-level drying and secondary drying respectively, and then is entered char zone and carried out
Charing, to obtain carbonizing sludge and combustible gas, and by the charing sludge outlet discharge positioned at material discharge region, it can use and be located at spiral shell
The heat smoke that burner combustion above and below rotation drying charring furnace inside spin conveyer produces 200~480 DEG C is directly treated
Handle domestic sludge and carry out heat supply, the dry total times carried out at different levels control in 20~80min, be not higher than to obtain water content
3wt% charing sludge, the vapor that vapor caused by volatilization can be set respectively from dry sections at different levels in domestic sludge go out
Mouth discharge, low boiling organic component caused by charing can be used as combustible gas to be exported by combustible gas and discharge, cigarette caused by burner
Gas can be from the exhanst gas outlet discharge positioned at material discharge region, and then vapor and flue gas can be exchanged heat, to reclaim condensed water.
Meanwhile burner can arrange multiple spot that heat utilization efficiency is high, and caused exhaust gas volumn is few, so as to big in dry sections at different levels
The big operating cost for reducing equipment.
According to embodiment of the present utility model, spiral drying charring furnace is suitable to handle material of different shapes, example
Lump material of such as average grain diameter not higher than 200mm, sheet material of the length and width not higher than 200mm, granular material simultaneously, can be located
The material variety of reason may further include：Domestic sludge, medical waste, chemical engineering sludge, pharmaceutical factory's discarded object, paper mill are discarded
Thing, waste printed circuit board and junked tire, waste plastics, biomass, coal and oil shale etc., for sludge class material, into spiral shell
See to filter in advance to average grain diameter before rotation drying charring furnace and be not higher than 30mm.
According to embodiment of the present utility model, the temperature of above-mentioned one-level drying, secondary drying and charing can be independently
Ground is 80~240 DEG C, and the temperature of one-level drying, secondary drying and charing is gradually incremented by, specifically, one-level dryer section material temperature
Degree is increased to 85 ± 3 DEG C, and secondary drying section temperature of charge is increased to 105 ± 5 DEG C, and charing section temperature of charge is increased to 200 ± 15
℃.Thus, it is possible to ensure that temperature when sludge enters char zone is higher, to volatilize using low-boiling-point organic compound as main component
Combustible gas.
According to a specific embodiment of the present utility model, when equipment brings into operation, fired used in each burner
Material can use the outside natural gas or liquefied gas provided, and fuel can be led to by being arranged on the pressure at the top of spiral drying charring furnace
Wind apparatus is sent into burner, with the pyrolysis of domestic sludge, after obtaining enough pyrolysis oil gas, pyrolysis oil can be used to be gas-cooled
But the purified gas obtained after, purifying is as burner fuel, so as to further improve the utilization rate of resource.
According to specific embodiment of the utility model, seal area, position are further comprised between secondary drying area and char zone
In being not provided with helical blade in the rotating shaft of the auger conveyor of seal area.Specifically, due to the auger conveyor rotating shaft in the region
Be not provided with helical blade, the partition wall to form flowing can be accumulated when sludge is delivered to the region, so as to by secondary drying area with charing
Separate from so as to improve the temperature of charge of char zone so that material carbonizes and volatilizes combustible gas.According to of the present utility model one
Individual specific embodiment, the length for being not provided with spiraling vane portions rotating shaft can be the 1/8~1/5 of rotating shaft total length, thus, it is possible to
Further be advantageous to the formation of seal area partition wall, so as to improve the carbonization effect of sludge.
According to specific embodiment of the utility model, body can with cylindrical, seal area can be located at body downstream and
Area segments at 1/2~2/3 in body length direction, thus, it is possible to further be beneficial to the formation of seal area partition wall, so as to improve
The carbonization effect of sludge.
According to embodiment of the present utility model, auger conveyor is arranged in body and along domestic sludge entrance to carbonizing dirt
The side of mud outlet is set up, and specifically, the filtered domestic sludge to average grain diameter not higher than 30mm enters spiral and dries charcoal
Can push into a pile by first helical blade on auger conveyor after changing furnace body, and under the promotion of auger conveyor according to
Secondary to pass through dry sections at different levels and char zone, under flue gas caused by burner combustion, the temperature of top layer domestic sludge can be with
80~120 DEG C are risen to, by drawing the agitation of helical form heating resisting metal blade that solid welding is scheduled on auger conveyor axle, domestic sludge
Homogeneous perturbation is obtained, internal layer sludge is overturn to top layer, so that it is guaranteed that domestic sludge is heated evenly, and moisture therein is fully de-
Remove, obtain the charing sludge that water content is not higher than 3wt%.
According to specific embodiment of the utility model, the pitch of auger conveyor blade is from domestic sludge entrance to charing
It is gradually reduced on the direction of sludge outlet.Thus, it is possible to further improve the effect that auger conveyor conveys pending domestic sludge
Rate.
According to embodiment of the present utility model, spiral drying charring furnace 100 can further include screen pack, screen pack
It is arranged in feed zone, and positioned at the lower section of auger conveyor.Pass through helix transporting device and spiral drying charring furnace front end
Spiral interacts, and is pressed further by between sludge, and the screen pack set by bottom can go out the moisture filter in sludge,
The moisture content into the sludge of one-level dry section can be made to be down to below 80wt%.
According to embodiment of the present utility model, spiral drying charring furnace can further include steam lead, and steam is led
Pipe can be arranged in one-level dry section and secondary drying area, and steam lead is provided with multiple steam entries, steam lead
The port of export is connected with the exhanst gas outlet of material discharge region.Thus, it is possible to the water for being dried to obtain domestic sludge using steam lead is steamed
Gas collect and with burner combustion caused by flue gas exchanged heat, and collect condensed water.
S200：Pyrolysis
In the step, charing sludge is delivered in revolving bed pyrolysis oven and is pyrolyzed, to obtain being pyrolyzed oil gas and to consolidate
Body residue.Specifically, whole revolving bed pyrolysis oven uses water seal, and charging aperture (charing sludge inlet) uses double spiral seal, with
Ensure that material is pyrolyzed under oxygen-free atmosphere in burner hearth；Revolving bed pyrolysis oven can be that ring packing structure or linear pattern are close
Seal structure, burner hearth are internally provided with distribution device, heater (radiant tube) and turn-down rig etc., are set at charing sludge inlet
Raw material material-homogenating device is equipped with, so as to which domestic sludge is evenly arranged on drapery panel, fabric thickness can be controlled in 20~200mm,
The time control that revolving bed pyrolysis oven rotates a circle is provided with multiple levels in 10~45min between material top and furnace roof
The regenerative gas radiant tube of installation is that material carries out heating pyrolysis, and the Stress control in pyrolytic process in revolving bed pyrolysis oven exists
Within 10kPa, with the progress of pyrolysis, the organic volatile matter in material is separated, and obtains being pyrolyzed oil gas and volatile matter content
Carbonaceous solids residue not higher than 3wt%, flue gas qualified discharge caused by radiant tube burning.
According to a specific embodiment of the present utility model, spoke can be controlled according to the ratio of organic component in different material
Penetrate pipe and be warming up to 800~1100 DEG C with 20~60 DEG C/min heating rate.On the other hand, radiant tube can be controlled apart from material
The height of upper surface is 50~100mm, thus, it is possible to while ensureing that radiant tube radiation energy utilization rate is higher, avoids radiating
Pipe contacts with material causes equipment operation abnormal.
According to a specific embodiment of the present utility model, spiral drying charring furnace can be arranged directly on revolving bed pyrolysis
Stove carbonizes the top of sludge inlet, so as to further reduce the floor space of equipment.
S300：Return to combustible gas
In the step, combustible gas is passed through in the burner in spiral drying charring furnace, so as to using combustible gas as fuel
Supply to burner uses, so as to further improve the utilization rate of resource.
S400：It is pyrolyzed oil gas purification
In the step, pyrolysis oil gas is supplied to oil gas cooling and purifying unit and cooled down and purified treatment, to obtain
Purified gas.Because domestic sludge is carrying out that dehydration and charing have been dried before pyrolysis removes into revolving bed pyrolysis oven, its heat
The pyrolysis oil being pyrolyzed in oil gas directly can be condensed recovery by pyrolysis oil gas caused by solution using oil cooled method, so as to avoid adopting
The problem of with water process difficulty and high cost is pyrolyzed after water cooling.
S500：Return to purified gas
In the step, purified gas is each led into the burner in spiral drying charring furnace and in revolving bed pyrolysis oven
In radiant tube, so as to by the use of purified gas as burner and the fuel of radiant tube, so as to further improve the utilization rate of resource.
Thus, according to the method for the processing domestic sludge of the utility model embodiment by the way that pending domestic sludge is supplied
To spiral drying charring furnace, under the propulsion of spiral drying charring furnace auger conveyor, pending domestic sludge passes through successively
Feed zone, one-level dry section, secondary drying area and char zone, and the burner combustion by being set in dry sections at different levels produces heat
Dehydration is dried to pending domestic sludge in flue gas, and is carbonized in char zone, obtains carbonizing sludge, combustible gas and water steaming
Gas, wherein charing sludge is discharged by material discharge region, vapor is discharged by steam outlet, and combustible gas is exported by the combustible gas of char zone
Discharge, heat smoke caused by burner combustion is after completing to the drying and dehydrating of domestic sludge and charing, by the flue gas of material discharge region
Outlet discharge, vapor pass through recyclable condensed water after heat exchange；And then carbonize sludge and be pyrolyzed into revolving bed pyrolysis oven,
To obtain being pyrolyzed oil gas and solid residue；Because pending domestic sludge completes drying and dehydrating and charing before being pyrolyzed,
The pyrolysis oil being pyrolyzed in oil gas directly can be condensed recovery by pyrolysis oil gas caused by pyrolysis using the oily type of cooling, so as to avoid
Processing caused by water content is too high in pyrolysis oil gas is difficult and the problem of cost is high, and by predrainage can avoid being pyrolyzed
Vapor expends radiation tubular heat in journey, and the pyrolysis oil for avoiding vapor from being obtained with pyrolysis is reacted, so as to further improve heat
The yield and quality of oil are solved, pyrolysis gas can return after removing sour gas is used as burner and radiant tube fuel.Thus, should
Method carries out dehydration carbonization in advance by using spiral drying charring furnace to pending domestic sludge, significantly improves pyrolysis oil gas
Quality, and reduce Oil-gas Separation cost, and the continuous stable and reliable operation of equipment, the thermal efficiency is high, and economic benefit is obvious.
Below with reference to specific embodiment, the utility model is described, it is necessary to which explanation is, these embodiments are only
Descriptive, without limiting the utility model in any way.
Embodiment
Moisture content is provided in 82wt% domestic sludge by Beijing area, and material storing is in feed bin, first using filter
Remove particle diameter ＞ 30mm stone.Domestic sludge is sent into spiral drying charring furnace front end feeding warehouse with feeding system, life is dirty
Mud enters spiral drying charring furnace front end feed zone under gravity, will be raw by the rotation of unequal distant screw in drying chamber shell
Sludge living is sent into spiral drying charring furnace, by the burner combustion of auger conveyor above and below produce temperature 220 ±
20 DEG C of heat smoke is directly to domestic sludge heat supply, and the top layer domestic sludge temperature close to combustion zone quickly raises, and moisture is quick
Evaporation, the combustion heat quickly passes to internal layer from sludge top layer, and under the agitation of spiral, domestic sludge is able to homogeneous perturbation, and internal layer is dirty
Mud is flipped to top layer, and sludge temperature quickly raises, and the moisture in sludge further removes, so that it is guaranteed that domestic sludge leaves two
Moisture is fully removed before level dry section, and moisture content is down to 3 ± 0.2wt%.Vapor and combustion caused by domestic sludge volatilization
Flue gas caused by burning enters back segment heat-exchanger rig together, quickly reclaims condensed water.Sludge after drying continues to deliver into forward
Without filled up after helical axis entirely without helical axis region (seal area) after, into char zone, control char zone burner combustion produces
Heat smoke of the temperature at 400 ± 10 DEG C, sludge under the directly heating of heat smoke, one-level dryer section temperature of charge is increased to 85 ±
3 DEG C, secondary drying section temperature of charge is increased to 105 ± 5 DEG C, and charing section temperature of charge is increased to 200 ± 15 DEG C, and which part is low
Boiling point organic component volatilizes, and is exported by combustible gas in the fuel gas inlet of export feeding spiral drying charring furnace burner and supplies spiral shell
Drying charring furnace is revolved to use.The charing sludge obtained after low-temperature carbonization is sent into revolving bed pyrolysis oven by sealed conveying device,
Under the effect of entrance raw material material-homogenating device, material is evenly arranged on drapery panel, and fabric thickness is controlled in 120 ± 10mm.Material with
When cloth tray rotation, heated by gas heating area by top regenerative gas radiant tube, the control of radiant tube programming rate exists
50 ± 5 DEG C/min, radiant tube temperature control is at 950 ± 50 DEG C, and the time control that revolving bed rotates a circle is in 20 ± 5min.Rotation
Pyrolysis oil gas caused by bed pyrolysis oven pyrolysis sends spiral back to after oil gas cooling and purifying system condensing removes sour gas and dries charcoal
Change and burnt in stove and revolving bed regenerative gas radiant tube, be that spiral drying charring furnace and revolving bed pyrolysis improve heat.Pyrolysis
Caused pyrolysis oil gas directly can will be pyrolyzed pyrolysis oil condensation recovery in oil gas using the oily type of cooling, so as to avoid using water cooling
Water process difficulty and high cost problem are pyrolyzed afterwards.In addition, flue gas qualified discharge caused by the burning of regenerative gas radiant tube.Pyrolysis
Stove pyrolysis generation solid residue is come out of the stove outer by the spiral transferring that discharges.
The utility model technique can long-term smooth operation, equipment failure rate is extremely low, the yield of gained thermal decomposition product and main
Property is shown in Table 1.
The thermal decomposition product of table 1 is analyzed
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present utility model.In this manual, to the schematic table of above-mentioned term
State and be necessarily directed to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be with
Combined in an appropriate manner in any one or more embodiments or example.In addition, in the case of not conflicting, this area
Technical staff the different embodiments or example and the feature of different embodiments or example described in this specification can be entered
Row combines and combination.
Although embodiment of the present utility model has been shown and described above, it is to be understood that above-described embodiment is
Exemplary, it is impossible to it is interpreted as to limitation of the present utility model, one of ordinary skill in the art is in the scope of the utility model
It is interior above-described embodiment to be changed, changed, replaced and modification.
Claims (7)
- A kind of 1. system of continuous processing domestic sludge, it is characterised in that including：Spiral drying charring furnace, the spiral drying charring furnace include：Body, one end of the body have domestic sludge entrance, and the other end has charing sludge outlet, the body interior edge institute State domestic sludge entrance and be sequentially formed with feed zone, one-level dry section, secondary drying to the direction of the charing sludge outlet Area, char zone and material discharge region, the one-level dry section, the secondary drying area and the char zone are respectively arranged with burner, The one-level dry section and the secondary drying area have steam outlet, and the char zone has combustible gas outlet, the row Material area has exhanst gas outlet；Auger conveyor, the auger conveyor go out in the body and along the domestic sludge entrance to the charing sludge The side of mouth is set up；Revolving bed pyrolysis oven, the revolving bed pyrolysis oven have charing sludge inlet, pyrolysis oil gas vent and solid residue outlet, Radiant tube is provided with the revolving bed pyrolysis oven, the charing sludge inlet is connected with the charing sludge outlet；Oil gas cooling and purifying unit, the oil gas cooling and purifying unit have oil gas entrance, pyrolysis oil export and clean gas outlet, The oil gas entrance is connected with the pyrolysis oil gas vent, the clean gas outlet respectively with the fuel gas inlet of the burner and The fuel gas inlet of the radiant tube is connected.
- 2. the system of continuous processing domestic sludge according to claim 1, it is characterised in that the secondary drying area and charcoal Change further comprises seal area between area, and helical blade is not provided with the rotating shaft of the auger conveyor in the seal area.
- 3. the system of continuous processing domestic sludge according to claim 2, it is characterised in that the body is cylindrical, The seal area be located at the body downstream and in the body length direction 1/2~2/3 at area segments.
- 4. the system of continuous processing domestic sludge according to claim 1, it is characterised in that leaf on the auger conveyor The pitch of piece is gradually reduced on domestic sludge conveying direction.
- 5. the system of continuous processing domestic sludge according to claim 1, it is characterised in that the spiral drying charring furnace Further comprise：Screen pack, the screen pack is arranged in the feed zone, the one-level dry section and the secondary drying area, and is located at The lower section of the auger conveyor.
- 6. the system of continuous processing domestic sludge according to claim 1, it is characterised in that the spiral drying charring furnace Further comprise：Steam lead, the steam lead are arranged in the one-level dry section and the secondary drying area, the steam lead Multiple steam entries are provided with, the port of export of the steam lead connects with the exhanst gas outlet of the material discharge region.
- 7. the system of continuous processing domestic sludge according to claim 1, it is characterised in that the combustible gas of the char zone Outlet is connected with the fuel gas inlet of the burner.
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|---|---|---|---|
| CN201720771659.6U CN207091260U (en) | 2017-06-28 | 2017-06-28 | The system of continuous processing domestic sludge |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111056552A (en) * | 2019-12-30 | 2020-04-24 | 广东职业技术学院 | Automatic treatment system for converting printing and dyeing sludge into activated carbon |
| RU2776712C1 (en) * | 2021-11-25 | 2022-07-25 | Марина Игоревна Вепринцева | Method for obtaining products of thermal destruction of sludge deposits of urban wastewater |
-
2017
- 2017-06-28 CN CN201720771659.6U patent/CN207091260U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111056552A (en) * | 2019-12-30 | 2020-04-24 | 广东职业技术学院 | Automatic treatment system for converting printing and dyeing sludge into activated carbon |
| CN111056552B (en) * | 2019-12-30 | 2024-04-19 | 广东职业技术学院 | Automatic treatment system for converting printing and dyeing sludge into activated carbon |
| RU2776712C1 (en) * | 2021-11-25 | 2022-07-25 | Марина Игоревна Вепринцева | Method for obtaining products of thermal destruction of sludge deposits of urban wastewater |
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