CN105886385A - Municipal solid waste dry type anaerobic-aerobic combined treatment reactor and process - Google Patents
Municipal solid waste dry type anaerobic-aerobic combined treatment reactor and process Download PDFInfo
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- CN105886385A CN105886385A CN201410742317.2A CN201410742317A CN105886385A CN 105886385 A CN105886385 A CN 105886385A CN 201410742317 A CN201410742317 A CN 201410742317A CN 105886385 A CN105886385 A CN 105886385A
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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Abstract
The invention belongs to the technical field of treatment of solid wastes and in particular relates to a municipal solid waste dry type anaerobic-aerobic combined treatment reactor and a combined treatment process. The combined treatment reactor is composed of two parts, namely a dry type anaerobic reaction zone and an aerobic reaction zone, wherein municipal solid wastes pass through the dry type anaerobic reaction zone, the produced biogas is discharged via an exhaust port, the produced biogas residues enter the aerobic reaction zone, and finally, the produced organic fertilizers are discharged from the bottom of the aerobic reaction zone. The combined treatment process is composed of three parts, namely a pretreatment process, a dry type anaerobic treatment process and an aerobic treatment process. After the municipal solid wastes are subjected to impurity removal and pulping by virtue of the pretreatment process and then enter the dry type anaerobic treatment process, the biogas produced by the anaerobic reaction is used for power generation or heat supply, the produced biogas slurry is recycled, and the produced biogas residues are prepared into high-quality organic fertilizers by virtue of the aerobic treatment process.
Description
Technical field
The invention belongs to field of solid waste treating technology, detest particularly to a kind of domestic waste dry type
Oxygen-aerobic combination treatment reactor and technique.
Background technology
Along with Chinese society expanding economy and the quickening of urbanization process, the generation amount of domestic waste is fast
Speed increases.Domestic waste has composition complexity, generation amount and produces the features such as characteristic is changeable, because forming
Primary pollution source for noxious waste pollution environment.Owing to Municipal Domestic Garbage Output is big, human body is good for
Health and ecological environment have potential eutrophication, and the process of domestic waste has caused the domestic and international public and government
Extensive concern.
Conventional urban garbage disposal mainly includes landfill with disposal technology, burn and biological treatment etc..
But, Sanitary Landfill Technology processing cost is low, simple, but cannot realize the resource of domestic waste.
The minimizing of incineration technology and innoxious effect are preferable, but can produce flue dust and harmful gas pollution, and
Incineration technology is the significant wastage to resource for the domestic waste that calorific value is low.Seek other more
Suitable Disposal of Municipal Refuse has become inevitable.
Owing to containing large number of biological mass-energy in domestic waste, its High water cut characteristic is again this kind of garbage
Bio-energy convert provide advantage, effectively utilize this kind of biomass energy, to realizing environment and warp
The sustainable development of Ji is significant.Anaerobic-aerobic treatment skill for city organic solid castoff
Art becomes one of focus of concern both at home and abroad.
Use anaerobic digestion techniques to process domestic waste, not only can realize the nothing to domestic waste
Evilization processes, but also can reclaim biogas, the biogas of generation can be used to heat production, generate electricity, supply natural
Gas or as motor vehicle fuel, reduces the discharge of greenhouse gases.
According to the difference of solid holdup (TS), the anaerobic digestion of domestic waste be divided into wet type (TS be 5%～
15%) and dry type (TS is 15%～40%) two kinds.The built many employings of anaerobic digestion engineering run
Wet type anaerobic digestion.Wet type anaerobic digestion reaction vessel volume is big, and factor of created gase is relatively low, and dilution fermentation substrate consumption
The water yield is big, had both added the operating cost of technique, again waste water resource, and also can produce a large amount of biogas slurry.And do
The process load that formula anaerobic digestion techniques can reach is high, and the biogas slurry amount of generation is few, the house refuse of unit mass
Process the reactor volume needed little.
Domestic waste dry-type anaerobic fermentation process can produce a large amount of biogas residue, can cause secondary if dealing with improperly
Pollute.But biogas residue is undegradable organic matter, containing more comprehensive nutrient substance and abundant Organic substance, it is
Carry out the desirable feedstock of aerobic compost.Therefore, the biogas residue that house refuse dry-type anaerobic fermentation produces is entered
The one aerobic harmless treatment of step is the most necessary.
At present, anaerobic digestion and aerobic composting technology have been applied to the process of domestic waste the most, but,
Due to the composition complexity of domestic waste, rely on single anaerobic digestion or aerobic technical finesse urban life
Rubbish, often poor effect, minimizing and resource limitation.
In view of single anaerobic digestion and the respective limitation of aerobic composting technology, it is proposed that a kind of city is raw
Rubbish dry type anaerobic-aerobic combined treatment reactor alive and technique, improve the resource of urban garbage disposal
Change, minimizing and innoxious effect.
Summary of the invention
The invention provides and a kind of can improve the resource of domestic waste, minimizing and innoxious effect,
Operation operation and maintenance are simple, at the domestic waste dry type anaerobic-aerobic combination that investment is low with operating cost
Reason reactor and technique.
It is an object of the invention to be achieved through the following technical solutions:
A kind of domestic waste dry type anaerobic-aerobic combined treatment reactor of the present invention, anti-by dry type anaerobism
Answering district and aerobic reactor zone two parts composition, domestic waste first passes through dry type anaerobic reaction district, the natural pond of generation
Gas is discharged through air vent, and the biogas residue of generation enters aerobic reactor zone, and the organic fertilizer finally produced is from aerobic reaction
The bottom in district is discharged.Wherein:
It is provided with a perforated retainer in dry type anaerobic reaction district；Have on outer wall bottom dry type anaerobic reaction district
One biogas slurry return duct, biogas slurry return duct connects alkali liquid tank, heat exchanger, biogas slurry reflux pump and biogas slurry backflow spray
Device, biogas slurry backflow spray equipment, at the top in anaerobic reaction district, is provided with biogas slurry backflow shower, and biogas slurry refluxes
Shower is evenly arranged on biogas slurry backflow spray equipment with same incline direction clockwise or counterclockwise；In dry type
Having a biogas residue discharge pipe on the sidewall of bottom, anaerobic reaction district, biogas residue discharge pipe is positioned at dry type anaerobic reaction district
Part downward-sloping insertion material surface below, and between the angle between horizontal line 30 °～60 °；Dry
Sidewall in the middle part of formula anaerobic reaction district is provided with temperature monitor, pH detector and ORP detector；In dry type
Having a feed pipe on the sidewall on top, anaerobic reaction district, feed pipe connects feed pump and material regulation tank, thing
Material regulation tank is provided with material regulation agitator；The outer wall at top, dry type anaerobic reaction district has exhaustor and peace
Full valve；
Aerobic reactor zone is that certain angle of inclination is placed, the angle between itself and horizontal plane 20 °～40 ° it
Between；Outer wall in aerobic reactor zone is provided with a heat-insulation layer, has a biogas slurry conveying pipe at the top of heat-insulation layer,
Biogas slurry conveying pipe connects a biogas slurry delivery pump, has a biogas slurry outlet tube in the bottom of heat-insulation layer, and biogas slurry is defeated
Go out pipe to be connected with biogas slurry return duct；A discharge nozzle is had on outer wall bottom aerobic reactor zone；Aerobic instead
Answer and on the sidewall in the middle part of district, have an exhaust duct；The sidewall on top, aerobic reactor zone has a biogas residue charging
Pipe, biogas residue feed pipe connects a biogas residue feed pump；The outer wall at top, aerobic reactor zone has a ventilation
Pipe, ventilation duct connects a blower fan.
A kind of domestic waste dry type anaerobic-aerobic combined treatment process of the present invention, by pretreatment work
Skill, dry type anaerobic treatment process and aerobic treatment process three part composition, domestic waste initially enters pre-
Process technique, by the primary sorting such as artificial separation, magnetic separation by the metal in domestic waste and large scale
After foreign substances sorts out, carry out cracking and sorting, so that the light materials such as plastics, fiber sorts out, subsequently
Domestic waste is put into slurrying separation circuit, domestic waste is further broken up into grain diameter and exists
The fermented slurry of below 10mm, and sub-elect light materials, fermented slurry is put into desanding homogenate operation, removes
After the little granule heavy substance such as sandstone, fermented slurry enters dry type anaerobic treatment process, regulates tank pair by material
Fermented slurry carries out inoculating and regulate its solid holdup, and the fermented slurry regulated enters composite reaction mentioned above
The dry type anaerobic reaction district of device, carries out dry type under middle temperature (30 DEG C～40 DEG C) or high temperature (50 DEG C～65 DEG C)
Anaerobic fermentation, the air vent discharge from top, anaerobic reaction district of the biogas of generation, a biogas slurry part for generation is used
In return stirring, a part enters aerobic treatment process for the temperature raising and maintaining of aerobic reaction, the biogas residue of generation,
Put into the aerobic reactor zone of combined reactor mentioned above, at high temperature 50 DEG C～60 DEG C, carry out aerobic fermentation,
The organic fertilizer produced discharge nozzle bottom aerobic reactor zone is discharged.
Described biogas slurry return stirring be backflow biogas slurry is first passed through heating, alkaline cleaning after pump into dry type again and detest
Oxygen reaction zone carries out spray stirring, so that anaerobic fermentation keeps suitable reaction temperature, pH and stirring strong
Degree；
The described biogas slurry for aerobic reaction temperature raising and maintaining pumps into aerobic reaction after first passing through heat treated again
The heat-insulation layer in district, so that aerobic fermentation keeps suitable reaction temperature.
It is characteristic of the invention that the main body of urban garbage disposal reactor is become reconciled by dry type anaerobic reaction district
Oxygen reaction zone two parts composition, they synergism complete the degraded of domestic waste jointly.Urban life
Rubbish initially enters dry type anaerobic reaction district, and this top, district is provided with biogas slurry backflow spray equipment, can realize simultaneously
The stirring in anaerobic reaction district and temperature and the regulation of pH.Biogas slurry backflow spray on biogas slurry backflow spray equipment
Pipe is evenly distributed with same incline direction clockwise or counterclockwise, and material can be made to rotate towards same direction,
Realize the stirring to material；Before biogas slurry refluxes, by pH detector detection anaerobic reaction district pH value, if
Fermentation reaction is in acidifying state, is added in backflow biogas slurry by the alkali liquor in alkali liquid tank, is sprayed by backflow biogas slurry
Drench the pH value of regulation fermentation materials；Additionally, also by temperature monitor detection anaerobic reaction district temperature, logical
Backflow biogas slurry is heated by the regulation and control crossing heat exchanger, and then regulate dry type anaerobism when backflow biogas slurry sprays anti-
Answer the fermentation temperature in district.The biogas residue that dry type anaerobic reaction district produces enters aerobic reactor zone, and this district's outer wall sets
Having a heat-insulation layer, biogas slurry injects heat-insulation layer after heat exchanger heats, while ensureing aerobic reaction temperature,
Achieve recycling of biogas slurry.
Domestic waste dry type anaerobic-aerobic combined treatment process is by pretreating process, dry type anaerobic treatment
Technique and aerobic treatment process three part composition, domestic waste initially enters pretreating process, by city
Out, remaining domestic waste makes granule for recyclable materials in house refuse and other magazins' layout
Particle diameter, at the fermented slurry of below 10mm, enters dry type anaerobic treatment process after desanding is homogeneous, and anaerobism is anti-
The biogas that should produce is for generating or heat supply；The biogas slurry part produced sprays for anaerobic reaction backflow, and one
Part is incubated for aerobic reaction；The biogas residue produced enters aerobic treatment process, makes through aerobic compost reaction
High quality organic fertilizer material.
The biogas slurry that domestic waste dry type anaerobic reaction produces is circulated utilization by the present invention, and biogas residue is carried out
Aerobic compost, it is possible to make domestic waste be degraded thoroughly, is simultaneously achieved the resource of biogas residue and biogas liquid
Changing and utilize, it is to avoid secondary pollution, structure of reactor is compact, and floor space is little, technological process is the distinctest,
Operation operation and maintenance are simple, and investment and operating cost are low.
Present invention have the advantage that
1. the anaerobic fermentation of domestic waste is processed and aerobic compost treatment combines, be developed into a kind of city raw
Rubbish dry type anaerobic-aerobic combined treatment reactor alive and technique.This structure of reactor is compact, floor space
Little, technological process is the distinctest, runs operation and maintenance simple, and investment and operating cost are low.
2. the biogas slurry that dry type anaerobic reaction district produces all is circulated utilization, and a part is through adding at alkali, heating
Flow into biogas slurry backflow spray equipment after reason, make the temperature of anaerobic reaction, pH and stirring intensity be maintained at preferable model
In enclosing；A part flows into heat-insulation layer after heat treated, to ensure that aerobic compost reacts under constant high temperature
Carry out.
3. the biogas residue that dry type anaerobic reaction district produces enters aerobic reactor zone, carries out aerobic compost reaction, can realize
The recycling of biogas residue, and avoid secondary pollution.
Accompanying drawing explanation
Fig. 1. combined reactor structural representation of the present invention.
Fig. 2. the biogas slurry backflow spray equipment structural representation of combined reactor of the present invention.
Fig. 3. the biogas slurry backflow spray equipment top view of combined reactor of the present invention.
Reference
1. material regulation tank 2. material regulation agitator 3. feed pump
4. feed pipe 5. relief valve 6. exhaustor
7. biogas slurry delivery pump 8. biogas slurry backflow spray equipment 9. dry type anaerobic reaction district
10. biogas slurry backflow shower 11. biogas slurry return duct 12. biogas slurry reflux pump
13. heat exchanger 14. alkali liquid tank 15. temperature monitors
16.pH detector 17.ORP detector 18. perforated retainer
19. biogas residue discharge pipe 20. biogas residue feed pump 21. biogas slurry outlet tubes
22. discharge nozzle 23. exhaust duct 24. blower fans
25. ventilation duct 26. biogas slurry conveying pipe 27. aerobic reactor zones
28. heat-insulation layer 29. biogas residue feed pipes
Detailed description of the invention
Embodiment 1.
Refer to Fig. 1.A kind of domestic waste dry type anaerobic-aerobic combined treatment reactor, is divided into and detesting
Oxygen reaction zone 9 and aerobic reactor zone 27 two parts.
A perforated retainer 18 it is provided with in dry type anaerobic reaction district 9；Outer wall bottom dry type anaerobic reaction district 9
On have a biogas slurry return duct 11, biogas slurry return duct 11 connects has alkali liquid tank 14, heat exchanger 13, biogas slurry to reflux
Pump 12 and biogas slurry backflow spray equipment 8, biogas slurry backflow spray equipment 8, at the top in anaerobic reaction district 9, is provided with
Biogas slurry backflow shower 10, biogas slurry backflow shower 10 is uniformly arranged with same incline direction clockwise or counterclockwise
It is listed on biogas slurry backflow spray equipment 8；The sidewall of bottom, dry type anaerobic reaction district 9 has a biogas residue discharge
Pipe 19, biogas residue discharge pipe 19 be positioned at the part downward-sloping insertion material surface in dry type anaerobic reaction district 9 with
Under, and between the angle between horizontal line 30 °～60 °；Set on sidewall in the middle part of dry type anaerobic reaction district 9
There are temperature monitor 15, pH detector 16 and ORP detector 17；Side on top, dry type anaerobic reaction district 9
Having a feed pipe 4 on wall, feed pipe 4 connects feed pump 3 and material regulation tank 1, and material regulation tank 1 sets
Material is had to regulate agitator 2；The outer wall at top, dry type anaerobic reaction district 9 has exhaustor 6 and relief valve
5:
Aerobic reactor zone 27 is placed in certain angle of inclination, and the angle between itself and horizontal plane is at 20 °～40 °
Between；Outer wall in aerobic reactor zone 27 is provided with a heat-insulation layer 28, has a biogas slurry at the top of heat-insulation layer 28
Conveying pipe 26, biogas slurry conveying pipe 26 connects a biogas slurry delivery pump 7, has a natural pond in the bottom of heat-insulation layer 28
Liquid outlet tube 21, biogas slurry outlet tube 21 is connected with biogas slurry return duct 11；Outer wall bottom aerobic reactor zone 27
On have a discharge nozzle 22；An exhaust duct 23 is had on sidewall in the middle part of aerobic reactor zone 27；Aerobic instead
Answering and have a biogas residue feed pipe 29 on the sidewall on top, district 27, biogas residue feed pipe 29 connects a biogas residue feed pump
20；Having a ventilation duct 25 on the outer wall at top, aerobic reactor zone 27, ventilation duct 25 connects a blower fan 24.
Pretreated domestic waste is put in material regulation tank 1, at the work of material regulation agitator 2
Urban life and biogas residue being sufficiently mixed with lower, and complete inoculation, the material formed after inoculation is in charging
Pump in dry type anaerobic reaction district 9 from feed pipe 4 under the effect of pump 3 and carry out dry anaerobic digestion reaction, material
Gravity is relied on to move from top to bottom；During material fermentation, a biogas slurry part for generation is refluxed by biogas slurry
The effect of pump 12 through biogas slurry return duct 11 and heat exchanger 13 be back to biogas slurry backflow spray equipment 8, remaining
Pump into the heat-insulation layer 28 of compost reactor through biogas slurry conveying pipe 26 under the effect of biogas slurry delivery pump 7.Return in biogas slurry
Before stream, the pH value of material can be detected by pH detector 16, if material pH value is less than 6, can confirm that fermentation is anti-
Should be at acidifying state, now can the alkali liquor in alkali liquid tank 14 be added in backflow biogas slurry, with regulation backflow natural pond
The pH value of liquid, and then the pH value of fermentation materials is regulated when backflow biogas slurry sprays；Additionally, also by temperature
Degree detector 15 detects the fermentation temperature in reactor, and is realized backflow biogas slurry by the regulation and control of heat exchanger 13
Heating of heating, and then regulate the fermentation temperature in reactor when backflow biogas slurry sprays；Biogas slurry pumps into biogas slurry
After backflow spray equipment 8, spray on fermentation materials through biogas slurry backflow shower 10, biogas slurry backflow shower
It is evenly arranged on biogas slurry backflow spray equipment with same incline direction clockwise or counterclockwise and (refers to Fig. 2
And Fig. 3), material can be made to rotate towards same direction, thus realize the stirring to material；The biogas residue generated
Being partly into material regulation tank 1, the remaining effect by biogas residue feed pump 20 pumps into aerobic reactor zone 27
Inside carrying out aerobic compost reaction, aerobic reactor zone 27 is placed in certain angle of inclination, and biogas residue relies on action of gravity
Flowing from top to bottom, the air-flow that blower fan 24 produces is passed through aerobic reactor zone by ventilation duct 25, then through exhaust duct
23 discharge, it is ensured that the good ventilation of aerobic compost, and the biogas slurry after heat treated flows at heat-insulation layer 28 top,
Bottom is flowed out, it is ensured that the temperature needed for aerobic fermentation, the organic fertilizer of generation is eventually through discharge nozzle 22 row
Go out；The biogas generated can be discharged through exhaustor 6.
When utilizing combinations thereof reactor for treatment domestic waste, can in middle temperature (30 DEG C～40 DEG C) or
Carry out anaerobic fermentation under the conditions of high temperature (50 DEG C～65 DEG C), at high temperature 50 DEG C～60 DEG C, carry out aerobic fermentation,
The fermentation materials that solid holdup is 15%～40% can be processed.
A kind of domestic waste dry type anaerobic-aerobic combined treatment process, is divided into pretreating process, dry type
Anaerobic treatment process and aerobic treatment process three part.Concrete operation method:
Domestic waste initially enters pretreating process, by artificial separation and magnetic separation by domestic waste
In metal and after large scale foreign substances sorts out, domestic waste carries out cracking and sorting again, by plastics,
The light materials such as fiber sort out, and the domestic waste after cracking and sorting subsequently enters slurrying separation work
Sequence, is further broken up into domestic waste the grain diameter fermented slurry at below 10mm, and sorts
Going out light materials, prepared fermented slurry subsequently enters desanding homogenate operation, removes the little granule heavy substances such as sandstone
Rear entrance dry type anaerobic treatment process；Fermented slurry is introduced into material regulation tank, inoculates fermented slurry
And regulate its solid holdup, the dry type that deployed fermented slurry puts into combined reactor provided by the present invention is detested
Oxygen reaction zone, ferments under middle temperature (30 DEG C～40 DEG C) or high temperature (50 DEG C～65 DEG C), forms height
Concentration biogas, biogas residue and biogas slurry, the biogas of generation can be used for generating or carries out heat supply as fuel；Generate
A biogas slurry part is by carrying out backflow spray after heating, alkaline cleaning, required for regulating and controlling anaerobic fermentation reaction
Temperature, pH and stirring, the remaining heat-insulation layer pumping into aerobic reactor zone after heat treated, be used for controlling
Make the temperature needed for aerobe fermentation reaction；The biogas residue part generated is back to the inoculation of fermented slurry, remaining
Entrance aerobic treatment process, put into the aerobic reactor zone of combined reactor provided by the present invention, at high temperature 50
DEG C～60 DEG C at carry out aerobic fermentation, form high quality organic fertilizer material.
Claims (4)
1. a domestic waste dry type anaerobic-aerobic combined treatment reactor, by dry type anaerobic reaction district
Form with aerobic reactor zone two parts, it is characterized in that:
It is provided with a perforated retainer in dry type anaerobic reaction district；Open on outer wall bottom dry type anaerobic reaction district
Having a biogas slurry return duct, biogas slurry return duct connects alkali liquid tank, heat exchanger, biogas slurry reflux pump and biogas slurry backflow
Spray equipment, biogas slurry backflow spray equipment, at the top in anaerobic reaction district, is provided with biogas slurry backflow shower, natural pond
Liquid backflow shower is evenly arranged in biogas slurry backflow spray equipment with same incline direction clockwise or counterclockwise
On；Having a biogas residue discharge pipe on the sidewall of bottom, dry type anaerobic reaction district, biogas residue discharge pipe is positioned at main body
Below part downward-sloping insertion material surface in fermentation tank, and the angle between horizontal line 30 °～60 °
Between；Temperature monitor, pH detector and ORP detection it is provided with on sidewall in the middle part of dry type anaerobic reaction district
Instrument；Having a feed pipe on the sidewall on top, dry type anaerobic reaction district, feed pipe connects feed pump and thing
Material regulation tank, material regulation tank is provided with material regulation agitator；On the outer wall at top, dry type anaerobic reaction district
Have exhaustor and relief valve；
Aerobic reactor zone is that certain angle of inclination is placed, the angle between itself and horizontal plane 20 °～40 ° it
Between；Outer wall in aerobic reactor zone is provided with a heat-insulation layer, has a biogas slurry conveying pipe at the top of heat-insulation layer,
Biogas slurry conveying pipe connects a biogas slurry delivery pump, has a biogas slurry outlet tube in the bottom of heat-insulation layer, and biogas slurry is defeated
Go out pipe to be connected with biogas slurry return duct；A discharge nozzle is had on outer wall bottom aerobic reactor zone；Aerobic instead
Answer and on the sidewall in the middle part of district, have an exhaust duct；The sidewall on top, aerobic reactor zone has a biogas residue charging
Pipe, biogas residue feed pipe connects a biogas residue feed pump；The outer wall at top, aerobic reactor zone has a ventilation
Pipe, ventilation duct connects a blower fan.
2. utilize the combined reactor described in claim 1 to carry out a technique for urban garbage disposal,
It is made up of pretreating process, dry type anaerobic treatment process and aerobic treatment process three part, it is characterized in that: city
City's house refuse initially enters pretreating process, by the primary sorting such as artificial separation, magnetic separation by urban life
After metal in rubbish and large scale foreign substances sort out, carry out cracking and sorting, so that plastics, fiber etc.
Light materials sorts out, and domestic waste puts into slurrying separation circuit subsequently, is entered by domestic waste
One step is broken into the grain diameter fermented slurry at below 10mm, and sub-elects light materials, by fermented slurry
Putting into desanding homogenate operation, after removing the little granule heavy substances such as sandstone, fermented slurry enters dry type anaerobic treatment
Technique, regulates tank by material and inoculates fermented slurry and regulate its solid holdup, the fermentation slurry regulated
Liquid enters the dry type anaerobic reaction district of combined reactor mentioned above, at middle temperature (30 DEG C～40 DEG C) or high temperature
Carrying out dry-type anaerobic fermentation under (50 DEG C～65 DEG C), the biogas of generation is from the row at top, dry type anaerobic reaction district
QI KOU is discharged, and a biogas slurry part for generation is used for return stirring, and a part is used for the temperature raising and maintaining of aerobic reaction,
The biogas residue produced enters aerobic treatment process, puts into the aerobic reactor zone of combined reactor mentioned above, at height
Aerobic fermentation is carried out, the organic fertilizer of generation discharging bank of tubes bottom aerobic reactor zone at temperature 50 DEG C～60 DEG C
Go out.
Technique the most according to claim 2, is characterized in that: described biogas slurry return stirring is to reflux
Biogas slurry pumps into dry type anaerobic reaction district again and carries out spray stirring after first passing through heating, alkaline cleaning, so that
Anaerobic fermentation keeps suitable reaction temperature, pH and stirring intensity.
Technique the most according to claim 2, is characterized in that: described for aerobic reaction temperature raising and maintaining
Biogas slurry first pass through heat treated after pump into the heat-insulation layer of aerobic reactor zone again, so that aerobic fermentation keeps suitable
Suitable reaction temperature.
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| CN111848238A (en) * | 2020-08-26 | 2020-10-30 | 海南大学 | Perishable garbage in-situ closed-loop treatment system with capacity and high value-added products |
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