CN206970441U - The processing system of carbonaceous solids discarded object - Google Patents
The processing system of carbonaceous solids discarded object Download PDFInfo
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- CN206970441U CN206970441U CN201720217172.3U CN201720217172U CN206970441U CN 206970441 U CN206970441 U CN 206970441U CN 201720217172 U CN201720217172 U CN 201720217172U CN 206970441 U CN206970441 U CN 206970441U
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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 provides a kind of processing system of carbonaceous solids discarded object, predrying unit is stored including sludge, sludge stores predrying unit connection drying sludge unit, drying sludge unit connects pyrolyzing sludge unit and combustion gas burning and waste heat recovery unit, the connection combustion gas burning of pyrolyzing sludge unit and waste heat recovery unit.The utility model uses self-heating type thermal decomposition gasification system, and gas phase and solid phase are separately handled, and by three step process sludge such as mechanical dehydration, drying and dehydrating and pyrolytic gasification, realizes the innoxious of sludge, minimizing, recycling and stabilisation.Heat carries heat by sludge and realizes self-balancing in itself in system, and when sewage sludge quality is poor, in the case that calorific value is relatively low, increase coke pyrolysis reactor is to realize the heat balance of system.The system fully achieves the clean environment firendly processing of the carbonaceous solids discarded object such as sludge, application prospect is very wide Wu dioxin emission and dust emission problem.
Description
Technical field
A kind of processing system of the carbonaceous solids discarded object such as sludge is the utility model is related to, belongs to solid waste processing skill
Art field.
Background technology
In recent decades, the quickening with our national urbanization process and the high speed development of social economy, municipal drainage
The construction of infrastructure has been made significant headway, and municipal sewage networking rate improves constantly.National urban wastewater treatment firm produces
About 1,300,000 tons/year of dewatered sludge, and increased with every year about 10% speed., will if municipal sewage is all handled
Produce 8,400,000 tons/year of dewatered sludge amount.Due to containing substantial amounts of poisonous and harmful substances in sewage plant biological sludge, easily trigger two
Secondary pollution problem.Therefore, how by yield is huge, sludge of complicated component passes through scientific disposal, stabilizing it, minimizing,
Innoxious, recycling, it has also become the problem that China or even whole world environment circle are paid close attention to jointly.China municipal sludge processing disposal by
Enough attention is not affected by long-term, treatment facility builds serious hysteresis.According to the investigation of Chinese environmental ERC, each
In kind method of disposal, agricultural to account for 44.8%, land landfill accounts for 31%, and other disposal account for 10.5%, separately have about
13.7% municipal sludge has just been come back in nature without any processing.
At present, the conventional meanses such as the processing mode of municipal sludge predominantly fills, row is extra large, burns.Landfill, because sludge is
A kind of complicated mixture, many harmful substances are contained in the inside, and after the time has been grown, the harmful substance in sludge can soak at leisure
Thoroughly among soil, so as to cause seriously to destroy to soil property.Row sea, can be to ocean if the improper directly row sea of Treatment of Sludge
The living resources such as fish cause serious pollution, destroy the ecological environment of ocean, make the resource of ocean cannot effectively utilize,
Even catastrophic consequence.Burn, due to containing a large amount of harmful substances in sludge, and burning is carried out under aerobic environment
Combustion reaction, while the heavy metal contained in sludge is but also as the catalyst of reaction, so inevitable in combustion process
Meeting produce substantial amounts of harmful substance, such as nitrogen oxides, sulfur dioxide and dioxin-like chemical, so as to be caused to ecological environment
Secondary pollution.
In summary, the process problem of the solid waste rubbish such as sludge has become getting worse and as limitation city health hair
An important factor for exhibition, how sludge to be stabilized, minimizing, innoxious, recycling is very urgent.The application will carry
Go out the new technology system and its application method of a kind of solid waste garbage harmless recycling treatment such as sludge.
Utility model content
The technical problems to be solved in the utility model is：Make full use of the calorific value of solid waste rubbish in itself to carry out self to decompose,
Do not produce secondary pollution, calorific value itself is not high be not enough to be formed energy circulation balance when, using additional minimum energy, most
On the premise of Low investment and operating cost, energy supplement is carried out in a manner of most environmentally friendly, the clean environment firendly for completing solid waste rubbish turns
Change or utilize, be fully solved the generation of the secondary pollutions such as heavy metal, bioxin.
In order to solve the above-mentioned technical problem, the technical solution of the utility model is to provide a kind of place of carbonaceous solids discarded object
Reason system, it is characterised in that：Predrying unit is stored including sludge, sludge stores predrying unit connection drying sludge unit,
Drying sludge unit connects pyrolyzing sludge unit and combustion gas burning and waste heat recovery unit, and the connection combustion gas of pyrolyzing sludge unit is burned
With waste heat recovery unit.
Preferably, the sludge, which stores predrying unit, includes warehouse of sludge, and warehouse of sludge connects sludge by bucket elevator
Tank, sludge tank connection emchanically centrifugal separation dewaterer；The outfall of emchanically centrifugal separation dewaterer and warehouse of sludge it is clear
Clear liquid drainage is connected with sewage pump.
Preferably, the drying sludge unit includes drying drum, and the hot water and steam outlet of waste heat boiler connects drying drum,
The sludge stores the sludge outlet connection drying drum of predrying unit, the recirculation water steam outlet connection waste heat of drying drum
Boiler.
Preferably, the combustion gas burning includes incinerator, the drying gas floss hole of the drying drum with waste heat recovery unit
Incinerator is connected, the low-temperature flue gas outlet of the waste heat boiler connects air preheater high temperature side entrance, and air preheater is low
Warm side entrance is air intake, and air preheater low temperature side outlet connects incinerator.
Preferably, the pyrolyzing sludge unit includes pyrolysis reactor, the sludge outlet connection pyrolysis of the drying drum
The reactant entrance of reactor, the flue gas discharge opening of the incinerator divide two-way, connect the thermal source inlet of pyrolysis reactor all the way,
The thermal source outlet flue gas of another way and pyrolysis reactor is together by going exhaust-heat boiler flue gas pipeline to be sent into the waste heat boiler；Heat
The thermal source outlet for solving reactor connects the waste heat boiler；The pyrolysis gaseous state product outlet connection cyclonic separation of pyrolysis reactor
Device, the gas discharge outlet of cyclone separator connect the incinerator；The pyrolysis solid product outlet connection two of pyrolysis reactor
Secondary recycling equipment.
Preferably, in addition to when system capacity can not realize self-balancing, the energy that energy is provided as auxiliary thermal source is auxiliary
Help unit.
It is highly preferred that the energy auxiliary unit includes coke pyrolysis reactor, gone described in the connection of coke pyrolysis reactor
Exhaust-heat boiler flue gas pipeline；The coke pyrolysis gas outlet of coke pyrolysis reactor connects the incinerator.
The utility model additionally provides a kind of processing method of carbonaceous solids discarded object, it is characterised in that：Using above-mentioned
The processing system of carbonaceous solids discarded object, step are：
Step 1：Sludge in warehouse of sludge is promoted in sludge tank by bucket elevator, and the sludge in sludge tank is sent into machinery
Centrifugal dewatering machine is dehydrated, and water content in sludge is down to less than 60% from 80%~90%；
Step 2：Sludge after dehydration is sent into drying drum and is dried, and the moisture in sludge is reduced to less than 25%；
Step 3：Dried sludge is sent into pyrolysis reactor and carries out pyrolytic reaction, removes most of organic matter in sludge and waves
Hair point；The residue of pyrolytic reaction generation goes secondary use by water Quench；
Step 4：Incinerator is sent into after the pyrolysis gas ash disposal of pyrolytic reaction generation to burn, heat smoke caused by burning goes to be pyrolyzed
Reactor is as indirect type heat exchange thermal source, and the partial fume removes waste heat boiler after pyrolysis reactor outflow, for producing hot water
Steam；
Step 5：Drying drum uses the hot water and steam to carry out indirect type drying to sludge for thermal source, and what drying drum came out returns
Flowing water steam is sent into waste heat boiler；Flue gas caused by waste heat boiler delivers to air preheater heating air, after air themperature lifting
Deliver to incinerator burning.
Preferably, the operation temperature of the drying drum is 140~160 DEG C；
The pyrolysis reactor operation temperature is 550~650 DEG C；
The operation temperature of the incinerator is 900~1100 DEG C；
The incinerator burn caused by heat smoke remove pyrolysis reactor as indirect type heat exchange thermal source, the partial fume from
The temperature of pyrolysis reactor outflow is 650~750 DEG C；
The pressure of the hot water and steam of the waste heat boiler is 0.5~0.8MPa, temperature is 150~200 DEG C；
The flue-gas temperature that air preheater is delivered to caused by the waste heat boiler is 350~450 DEG C；
The hot air temperature for delivering to incinerator of the air preheater outlet is more than 300 DEG C.
Preferably, when sludge calorific value as little as system can not produce the pyrolysis gas of enough calorific values by pyrolyzing sludge, burn
Stove combustion product gases temperature and flow do not reach total amount of heat needed for dry and pyrolysis, and it is hot now to start energy auxiliary unit offer auxiliary
Amount.
The utility model uses self-heating type thermal decomposition gasification system, and gas phase and solid phase are separately handled, and pass through mechanical dehydration, drying
Three step process sludge such as dehydration and pyrolytic gasification, realize the innoxious of sludge, minimizing, recycling and stabilisation.System
Interior heat carries heat by sludge and realizes self-balancing in itself, and when sewage sludge quality is poor, in the case that calorific value is relatively low, increase coke is warm
Reactor is solved to realize the heat balance of system.The system fully achieves sludge Wu dioxin emission and dust emission problem
Clean environment firendly etc. carbonaceous solids discarded object is handled, and application prospect is very wide.
The utility model stable and reliable operation, it is easy to maximization amplification, environmental protection and energy saving, compared with prior art, has as follows
Beneficial effect：
(1) the utility model uses self-heated pyrolysis reaction principle, realizes Treatment of Sludge gas, separation, sludge residue are complete admittedly
Portion is discharged in the form of low slag, has a certain amount of carbon residue, can be utilized as the raw material secondary recovery of activated carbon；
(2) the utility model uses pyrolysis gas independent burning system, and gas phase is fully converted to CO by high temperature incineration process2With
H2O, a small amount of sulfide are completely converted into SOx, and no bioxin produces, and produced heat smoke is for needed for internal anhydro drying and pyrolysis
Heat, system capacity realize self-balancing, and capacity usage ratio is higher；
(3) the utility model pyrolysis reaction temperature is carried out below 650 DEG C, during completely avoid the generation of bioxin
And precipitation, realize sewage sludge harmlessness cleaning treatment.
Brief description of the drawings
Fig. 1 is the processing system schematic diagram for the carbonaceous solids discarded object that the present embodiment provides；
Description of reference numerals：
1- sludge streams；2- warehouse of sludge；3- bucket elevators；4- sludge tanks；5- emchanically centrifugal separation dewaterers；6- sewage；
7- clarified solutions；8- drying drums；9- air preheaters；10- air；11- waste heat boilers；12- discharges flue gas；13- hot-airs；14-
Low-temperature flue gas；15- backflow water vapours；16- dries discharge gas；17- hot water and steams；18- incinerator burners；19- removes waste heat boiler
Flue gas pipeline；Pyrolysis gas after 20- ash disposal；21- incinerators；22- pyrolysis reactors；23- removes pyrolysis smoke；24- collects sewage stream；
25- is pyrolyzed solid product；26- is pyrolyzed gaseous products；27- cyclone separators；28- removes coke reactor flue gas；29- coke is pyrolyzed
Reactor；30- coke；31- coke pyrolysis gas；32- sewage pumps.
Embodiment
With reference to specific embodiment, the utility model is expanded on further.It should be understood that these embodiments are merely to illustrate this
Utility model rather than limitation the scope of the utility model.In addition, it is to be understood that reading the content of the utility model instruction
Afterwards, those skilled in the art can make various changes or modifications to the utility model, and these equivalent form of values equally fall within this Shen
Please appended claims limited range.
Fig. 1 is the processing system schematic diagram for the carbonaceous solids discarded object that the present embodiment provides, and described carbonaceous solids are discarded
The processing system of thing stores predrying unit, drying sludge unit, pyrolyzing sludge unit, combustion gas burning and waste heat recovery by sludge
Unit and energy auxiliary unit etc. form.
Described sludge stores predrying unit and taken off including warehouse of sludge 2, bucket elevator 3, sludge tank 4, emchanically centrifugal separation
Water dispenser 5, warehouse of sludge 2 connect sludge tank 4 by bucket elevator 3, and sludge tank 4 connects emchanically centrifugal separation dewaterer 5.Sludge stream
1 enters warehouse of sludge 2, and the sludge in warehouse of sludge 2 is promoted in sludge tank 4 by bucket elevator 3, and the sludge in sludge tank 4 enters
Enter emchanically centrifugal separation dewaterer 5, emchanically centrifugal separation dewaterer 5 make in sludge water content from 80%~90% be down to 60% with
Under, the sewage 6 removed will go after-treatment by sewage pump 32.Clarified solution 7 in warehouse of sludge 2 is also fed into sewage pump 32,
The discharge of sewage pump 32 collects sewage stream 24.
Described drying sludge unit includes drying drum 8, and the hot water and steam 17 of waste heat boiler 11 is sent into drying drum 8.Machinery
Dehydration is dried in sludge feeding drying drum 8 after centrifugal dewatering machine 5 is dehydrated, 150 DEG C or so of the operation in drying drum
Dried under temperature conditionss, drying drum 8 uses hot water and steam 17 to carry out indirect type drying to sludge for thermal source, makes the moisture in sludge
Less than 25% is reduced to by 60%.The backflow water vapour 15 that drying drum 8 comes out is sent into waste heat boiler 11.
Described combustion gas burning includes incinerator 21, the row of drying caused by the drying process of drying drum 8 with waste heat recovery unit
Deflation 16 all send incinerator 21 to carry out burning disposal.The low-temperature flue gas 14 that waste heat boiler 11 is discharged is sent into air preheater 9, with
The air 10 of air inlet preheater 9 exchanges heat, and air 10 forms hot-air 13 after exchanging heat and is sent into burning by incinerator burner 18
Stove 21, low-temperature flue gas 14 form discharge flue gas 12 and discharged after exchanging heat.
Described pyrolyzing sludge unit includes pyrolysis reactor 22, and 8 dried sludge of drying drum is sent into pyrolysis reactor
22, high temperature pyrolysis processing is carried out to sludge by pyrolysis reactor 22；Pyrolysis smoke 23 is gone to be sent into heat caused by incinerator 21
Solve reactor 22, pyrolysis reactor 22 using incinerator 21 burn caused by go pyrolysis smoke 23 to be used as heat carrier, sludge is entered
The revolution pyrolysis of row indirect type.Pyrolysis gaseous products 26 send cyclone separator 27, are pyrolyzed after the ash disposal after the separation of cyclone separator 27
Gas 20 send incinerator 21 to burn；Incinerator 21 burns pyrolysis gas 20 after ash disposal and produces 1000 DEG C of high-temperature flue gas, in high-temperature flue gas
Heat of the partial heat (going pyrolysis smoke 23 to carry in Fig. 1) as pyrolysis reactor 22, remainder heat (are gone remaining in Fig. 1
Heat boiler flue gas pipeline 19 carries) hot water and steam 17 for producing high temperature is reclaimed by waste heat boiler 11, hot water and steam 17 is as dry
The thermal source of dry drum 8.Being pyrolyzed solid product 25 can secondary recovery processing utilization by water Quench.
Described energy auxiliary unit is mainly used in the system heating preheating of start-up, and relatively low in sludge calorific value
In the case of, provide up energy self-balancing as auxiliary thermal source when system capacity can not realize self-balancing.It is anti-using coke pyrolysis
Device 29 is answered, to go the heat smoke (removing coke reactor flue gas 28 in Fig. 1) that exhaust-heat boiler flue gas pipeline 19 attracts to be participated in for thermal source
The pyrolytic gasification reaction of coke 30, in 800 DEG C of -900 DEG C of generation pyrolytic reactions, make combustible component CO, CH4, H in flue gas2Improve
More than 50%；Caused coke pyrolysis gas 31 send incinerator 21 to burn.
By taking the self-heating type thermal decomposition gasification process system that a set of day handles 200 tons of sludge quantity (wet basis) as an example.Sludge is conventional
Municipal sludge.The design parameter of pyrolytic reaction device is as follows：
Feed sludge is aqueous：85%；
Sludge is aqueous after mechanical dehydration：60%；
Sludge is aqueous after drying：25%；
Air preheater outlet air temperature：305℃；
Operating pressure：Normal pressure；
Operation temperature：150 DEG C of drying drum, it is pyrolyzed 620 DEG C of drum；
Sludge dry base heat value：20000kJ/kg；
Contain about 65% organic matter and 35% inorganic matter in sludge；
Waste heat boiler produces water vapour 0.69MPa, 170 DEG C of temperature；
980 DEG C of flue-gas temperature after burning.
After processing
Carbon containing low slag calorific value：9000kJ/kg, sold for activated carbon raw material；
320 DEG C of smog discharge temperature；
Low solid impurity particle：2-5mm, loose structure.
System capacity realizes self-balancing, without starting coke pyrolysis reactor.
It can be drawn from data above, the utility model is protected using the gasification design of self-heating pyrolyzing sludge in sludge calorific value
It can be realized on the premise of card and complete clean conversion processing using dirty heat itself, without external heat source, while only sludge sheet
The discharge of body contained humidity, no dust emission, total system realize gas, solid separate type processing, do not produce bioxin and dust etc. two
Secondary pollution.Compared to conventional sludge fluidized combustion processing mode, energy consumption more than 10% is saved, dioxin emission value is reduced to 5%,
Dust emission is reduced to 10%.
In summary, the utility model has obvious technological innovation advantage, at the concentration of municipal sludge
Reason, recycling, innoxious, stabilisation and minimizing are realized, substitutes the technologies such as original Sludge landfill, burning and compost.
Claims (3)
- A kind of 1. processing system of carbonaceous solids discarded object, it is characterised in that：Predrying unit, sludge storage are stored including sludge Predrying unit connects drying sludge unit, drying sludge unit connection pyrolyzing sludge unit and combustion gas burning and waste heat recovery list Member, the connection combustion gas burning of pyrolyzing sludge unit and waste heat recovery unit；The sludge, which stores predrying unit, includes warehouse of sludge (2), and warehouse of sludge (2) connects sludge tank by bucket elevator (3) (4), sludge tank (4) connection emchanically centrifugal separation dewaterer (5)；The outfall of emchanically centrifugal separation dewaterer (5) and dirt The clarified solution outlet of mud warehouse (2) is connected with sewage pump (32)；The drying sludge unit includes drying drum (8), and the hot water and steam outlet of waste heat boiler (11) connects drying drum (8), The sludge stores the sludge outlet connection drying drum (8) of predrying unit, and the recirculation water steam outlet of drying drum (8) connects Connect waste heat boiler (11)；The combustion gas burning includes incinerator (21), the drying gas floss hole connection of the drying drum (8) with waste heat recovery unit Incinerator (21), low-temperature flue gas outlet connection air preheater (9) high temperature side entrance of the waste heat boiler (11), air are pre- Hot device (9) low temperature side entrance is air intake, and air preheater (9) low temperature side outlet connects incinerator (21)；The pyrolyzing sludge unit includes pyrolysis reactor (22), the sludge outlet connection pyrolytic reaction of the drying drum (8) The reactant entrance of device (22), the flue gas discharge opening of the incinerator (21) divide two-way, connect pyrolysis reactor (22) all the way The thermal source outlet flue gas of thermal source inlet, another way and pyrolysis reactor (22) is together by going exhaust-heat boiler flue gas pipeline (19) to send Enter the waste heat boiler (11)；The thermal source outlet of pyrolysis reactor (22) connects the waste heat boiler (11)；Pyrolysis reactor (22) pyrolysis gaseous state product outlet connection cyclone separator (27), cyclone separator (27) gas discharge outlet connection described in Incinerator (21)；The pyrolysis solid product outlet connecting secondary recycling equipment of pyrolysis reactor (22).
- A kind of 2. processing system of carbonaceous solids discarded object as claimed in claim 1, it is characterised in that：Also include working as system energy When amount can not realize self-balancing, the energy auxiliary unit of energy is provided as auxiliary thermal source.
- A kind of 3. processing system of carbonaceous solids discarded object as claimed in claim 2, it is characterised in that：The energy auxiliary is single Member includes coke pyrolysis reactor (29), and exhaust-heat boiler flue gas pipeline (19) is removed described in coke pyrolysis reactor (29) connection；It is burnt The coke pyrolysis gas outlet of charcoal pyrolysis reactor (29) connects the incinerator (21).
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| CN201720217172.3U CN206970441U (en) | 2017-03-07 | 2017-03-07 | The processing system of carbonaceous solids discarded object |
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| CN201720217172.3U CN206970441U (en) | 2017-03-07 | 2017-03-07 | The processing system of carbonaceous solids discarded object |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115231792A (en) * | 2022-07-22 | 2022-10-25 | 西安交通大学 | Elastic treatment system and method capable of realizing pyrolysis self-balancing of sludge |
-
2017
- 2017-03-07 CN CN201720217172.3U patent/CN206970441U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115231792A (en) * | 2022-07-22 | 2022-10-25 | 西安交通大学 | Elastic treatment system and method capable of realizing pyrolysis self-balancing of sludge |
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