CN108015098A - A kind of domestic garbage resource processing method - Google Patents
A kind of domestic garbage resource processing method Download PDFInfo
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- CN108015098A CN108015098A CN201711450446.4A CN201711450446A CN108015098A CN 108015098 A CN108015098 A CN 108015098A CN 201711450446 A CN201711450446 A CN 201711450446A CN 108015098 A CN108015098 A CN 108015098A
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- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
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- 229910021529 ammonia Inorganic materials 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The present invention discloses a kind of domestic garbage resource processing method, comprises the following steps：1）By house refuse after crushing, metal recovery, enzymolysis, separation, obtaining can fermented organic；During enzymolysis, while complex enzyme is added, complex enzyme is the mixture of cellulase, lipase and protease；2）By step 1）Can be crushed, be preheated after fermented organic mixes with stalk, hydro-thermal, insulation, flash distillation, ferment to the material after flash distillation, obtain biomass fuel.The primary house refuse of the present invention does not have to classification in advance, and all kinds of materials in house refuse are all recycled and utilized, and recycling degree is high, non-wastewater discharge, reduces processing cost, and by the house refuse and stalk fermentation after screening, biogas output is high, and aerogenesis is stablized；The indirect steam for making full use of it to produce in flash process, recycling heat, reduce energy consumption.
Description
Technical field
The invention belongs to the processing technology field of house refuse, and in particular to a kind of domestic garbage resource processing method.
Background technology
At present, the main processing method of house refuse has landfill disposal, burning disposal and compost treatment etc., it disposes target
It is " minimizing, innoxious, recycling ".Garbage loading embeading is current most important processing mode, because it is with cost is low, technology is simple
The features such as single, low to rubbish requirement, it is widely used, but it needs to occupy certain land resource, in addition, being produced during garbage loading embeading
Raw landfill leachate has high organic content, ammonia nitrogen concentration high, also has the metal ion of high concentration and species complexity, to rear
Continuous treatment technology has higher requirement, and the destruction to soil, underground water is extremely serious, also has a significant impact to surrounding enviroment.
In burning disposal, if emission as flying dust, ashes or flue gas by smoke stack emission, and account for amount of flue gas emission about
5% flyash is danger, it is necessary to special（It is typically very expensive）Treatment process, the bottom of about 25% inlet amount
Ash（But only account for inlet amount about 15%）It need to be transported safely and be handled, main emission includes greenhouse gas in atmosphere pollution
Body, sour gas, heavy metal, polycyclic aromatic hydrocarbon, Polychlorinated biphenyls, are particularly the more chlorodiphenyls of potential carcinogen and to two English and dibenzo
Furans, these air pollutants will discharge into the atmosphere part when domestic waste is burned, may to surrounding environment and
Public health causes serious pollution, or even promotes global warming progress faster.In addition, house refuse water content height causes rubbish
Caloric value it is low, burn that difficulty is big, high energy consumption completely.
Compost is the important method of biodegradable organic moiety, but transport and disposal process are more complicated, and moisture content is higher（It is logical
The often moisture more than 50%, this to burn unrealistic）, it is heavier under same volume, add freight.What compost produced
Gas is greenhouse gases, distributes bad smell, and landfill leachate attracts the pest such as mouse and fly to propagate germ.Compost conduct
Soil conditioner is one kind of most worthy, can improve the overall permanence of soil, reduces and corrodes, and keeps humidity, is more easy to seed
Germination, plant more preferably grow and reduce the dosage of synthetic fertilizer.Because the debirs suitable for compost are mainly swill,
It is difficult to separation and collection, need to consumes to obtain compost organic matter and largely manually be collected, increase cost；Peasant is often right
The chemical fertilizer made using discarded object is had a misgiving.
House refuse contains higher content of organics, but it ammonia, sulfide and long-chain fat easily occurs in independent fermentation
The accumulation of fat acid, causes anaerobic fermentation process to be suppressed, and seriously affects aerogenesis speed and cumulative gas production.
Hydro-thermal method pre-processes（Hot wash, Hot-washing）, it is to be based on lignin in biomass material there is gamma transition temperature
Degree, under higher than the temperature conditionss, rubbery state of the lignin by hard glass transition for melting, with hot water, hot diluted acid etc.
Solution carries out washing by soaking processing to lignin raw material, to change the property of lignin, reduces lignin to subsequent fiber element enzyme
Interference effect.The high polymer segment setting in motion in lignin under glass transition temperature, whole molecular chain movement show to glue
Fluidity matter and from intracellular dissolution formed lignin little particle so that the link effect power between cellulose or hemicellulose obtains
Enzymolysis efficiency is improved to reducing.But hydrothermal pretreatment process needs substantial amounts of water and high energy consumption.Therefore, it is low to study a kind of energy consumption
And the waste disposal method that resource utilization efficiency is high, become the research hotspot of expert.
The content of the invention
Present invention aims at provide a kind of domestic garbage resource processing method.
Based on above-mentioned purpose, the present invention takes following technical scheme：
A kind of domestic garbage resource processing method, comprises the following steps：
1）By house refuse after crushing, metal recovery, enzymolysis, separation, obtaining can fermented organic；During enzymolysis, while add multiple
Synthase, complex enzyme are the mixture of cellulase, lipase and protease；
2）By step 1）Can be crushed, be preheated after fermented organic mixes with stalk, hydro-thermal, insulation, flash distillation, after flash distillation
Material ferment, obtain biomass fuel.
Step 1）In dosage per g house refuse cellulases be 5-150 units, the dosage of lipase is that 2-100 is mono-
Position, the dosage of protease is 2-100 units；The protease is neutral proteinase；Separation includes flotation, screening.
Step 2）Heat source of the indirect steam caused by flash distillation as preheating；Ferment, then divide to the material after flash distillation
From, it is dry, the liquid after separation enters enzymolysis process；During enzymolysis, the content of solid matter is 8-12% in solution.
Step 2）Preheat and preheated for 2-5 grades of segmentations, flashed as 2-5 grades of segmentation flash distillations.
Step 2）Preheat and preheated for 3 grades of segmentations, be respectively level-one preheating, two level preheating, three-level preheating, flash as 3 fractions
Section flash distillation, is respectively primary flash, two-stage flash, three stages of flashing.
The heat source that indirect steam caused by primary flash is preheated as three-level, indirect steam caused by two-stage flash are made
For the heat source of two level preheating, the heat source that indirect steam caused by three stages of flashing is preheated as level-one.
Compared with prior art, the invention has the advantages that：
The primary house refuse of the present invention does not have to classification in advance, and all kinds of materials in house refuse are all recycled and utilized, and provides
Source degree is high, non-wastewater discharge, reduces processing cost, and by the house refuse and stalk fermentation after screening, biogas output
Height, and aerogenesis is stablized；The indirect steam for making full use of it to produce in flash process, recycling heat, reduce energy consumption.
Brief description of the drawings
Fig. 1 is the process flow chart of Examples 1 and 2；
Fig. 2 is preheating and the specific process flow chart of flash distillation of embodiment 1；
Fig. 3 is preheating and the specific process flow chart of flash distillation of embodiment 2；
Fig. 4 is the process flow chart of embodiment 3；
Fig. 5 is preheating and the specific process flow chart of flash distillation of embodiment 3.
Embodiment
Embodiment 1
A kind of domestic garbage resource processing method, technological process is as shown in Figure 1, comprise the following steps：
1）House refuse is crushed through pulverizer, size≤20mm of the rubbish after crushing, metal recovery, enzymolysis, flotation, screening
Afterwards, obtaining can fermented organic；During metal recovery, the magnetic metal in house refuse is first isolated with magnetic separator, then it is golden with whirlpool electricity
Category removal machine isolates the nonmagnetic metal in house refuse；When separating the rubbish after metal into enzymolysis reactor enzymolysis, add
Enter the biogas slurry that follow-up workshop section returns, form rubbish suspension, while add complex enzyme formation mixture, solid matter in mixture
Content is no more than 12%, and complex enzyme is the mixture of cellulase, lipase and protease, per g house refuse cellulases
Dosage is 150 units, and the dosage of lipase is 100 units, and the dosage of protease is 70 units；By the rubbish of enzymolysis, enter
Flotation device, using gas or liquid agitation, disperses house refuse, it settled, be layered under the effect of gravity, lower part for density compared with
Big inorganic matter（Sand, glass, ceramics etc.）, can not fermented organic（Plastics, chemical fibre etc.）Float on top, centre is containing can send out
The solution of ferment organic matter（Castoff of food and drink, paper, pericarp, leaf etc.）, inorganic matter is discharged in flotation motor spindle, remainder enters
Screening machine, obtained after screening solid can not fermented organic and containing can fermented organic solution；
2）To step 1）Containing that can add stalk mixing in the solution of fermented organic, the dosage of stalk is crude waste dosage
20%, then crush（Particle size≤20mm）, preheating, hydro-thermal, insulation, flash distillation, fermented to the material after flash distillation, point
From, it is dry, obtain biomass fuel；Preheat and preheated for 3 grades of segmentations, as shown in Fig. 2, respectively level-one preheating, two level preheating, three-level
Preheating, flashes and is flashed for 3 grades of segmentations, respectively primary flash, two-stage flash, three stages of flashing, secondary caused by primary flash
The heat source that steam is preheated as three-level, the heat source that indirect steam caused by two-stage flash is preheated as two level, during three stages of flashing
The heat source that the indirect steam of generation is preheated as level-one, the liquid after separation（Biogas slurry）Into enzymolysis process, after separating metal
Rubbish form rubbish suspension, while add complex enzyme, in rubbish can fermented organic digested to be dissolved in small point of water
Sub- material rubbish, indirect steam caused by drying are the heat source of hydro-thermal process.
The biogas produced that ferments generates electricity into internal combustion engine, obtains electric power resource, supplies electric user；Cooling water of internal combustion engine is used for
Fermentation tank is kept the temperature；Exhaust gases of internal combustion engines enters drier, and indirectly heat removes the moisture in wet biogas residue, obtains dried biogas residues；Dried biogas residues
The solid produced with assorting process mixes, and obtains biomass fuel.
Embodiment 2
A kind of domestic garbage resource processing method, technological process is as shown in Figure 1, comprise the following steps：
1）House refuse is crushed through pulverizer, size≤20mm of the rubbish after crushing, metal recovery, enzymolysis, flotation, screening
Afterwards, obtaining can fermented organic；During metal recovery, the magnetic metal in house refuse is first isolated with magnetic separator, then it is golden with whirlpool electricity
Category removal machine isolates the nonmagnetic metal in house refuse；When separating the rubbish after metal into enzymolysis reactor enzymolysis, add
Enter the biogas slurry that follow-up workshop section returns, form rubbish suspension, while add complex enzyme formation mixture, solid matter in mixture
Content is no more than 12%, and complex enzyme is the mixture of cellulase, lipase and protease, per g house refuse cellulases
Dosage is 5 units, and the dosage of lipase is 10 units, and the dosage of protease is 6 units；By the rubbish of enzymolysis, into flotation
Machine, using gas or liquid agitation, disperses house refuse, it settled, be layered under the effect of gravity, lower part is larger for density
Inorganic matter（Sand, glass, ceramics etc.）, can not fermented organic（Plastics, chemical fibre etc.）Float on top, centre is to have containing that can ferment
The solution of machine thing（Castoff of food and drink, paper, pericarp, leaf etc.）, inorganic matter is discharged in flotation motor spindle, remainder enters screening
Machine, obtained after screening solid can not fermented organic and containing can fermented organic solution；
2）To step 1）Containing that can add stalk mixing in the solution of fermented organic, the dosage of stalk is crude waste dosage
20%, then crush（Particle size≤20mm）, preheating, hydro-thermal, insulation, flash distillation, fermented to the material after flash distillation, point
From, it is dry, obtain biomass fuel；Preheat and preheated for 2 grades of segmentation preheatings, respectively level-one preheating, two level, flashed as 2 grades of segmentations
Flash distillation, as shown in figure 3, respectively primary flash, two-stage flash, indirect steam is preheated as two level caused by primary flash
Heat source, the heat source that indirect steam caused by two-stage flash is preheated as level-one, material produce secondary with two-stage flash first
Steam contacts, and temperature is increased to 60 DEG C, is preheated subsequently into two level, and the indirect steam produced with primary flash contacts, temperature liter
Up to 78 DEG C；Material is heated to 100 DEG C using the indirect steam that drying section produces, keeps the temperature more than 30 minutes；By level-one
Flash distillation, temperature of charge are down to 78 DEG C, produce the indirect steam that temperature is 78 DEG C；By two-stage flash, temperature of charge is down to 60 DEG C,
Produce the indirect steam that temperature is 60 DEG C.Liquid after separation（Biogas slurry）Into enzymolysis process, with separating the rubbish shape after metal
Into rubbish suspension, while add complex enzyme, in rubbish can fermented organic digested to be dissolved in the small-molecule substance rubbish of water
Rubbish, indirect steam caused by drying are the heat source of hydro-thermal process.
Remaining liquid after fermentation methane is subjected to separation of solid and liquid, obtains biogas slurry and solid biogas residue, solid in biogas slurry
Content about 6%, the content about 25% of solid in biogas residue；Biogas slurry returns to enzymolysis reactor, and biogas residue becomes dried biogas residues after drying.
The biogas produced that ferments generates electricity into internal combustion engine, obtains electric power resource, supplies electric user；Cooling water of internal combustion engine is used for
Fermentation tank is kept the temperature；Exhaust gases of internal combustion engines enters drier, and indirectly heat removes the moisture in wet biogas residue, obtains dried biogas residues；Dried biogas residues
The solid produced with assorting process mixes, and obtains biomass fuel.
House refuse can be obtained by classifying and fermenting：Metal, as resource reclaim；Inorganic matter because yield compared with
Small, value is not high, as construction material or carries out landfill disposal；Can not fermented organic, when categorized wash, sieve, moisture,
Content of ashes is low, and calorific value is higher, as fuel or is pyrolyzed to obtain bio oil, combustion gas；Biogas, as power generation；Biogas residue, does
Biomass fuel is used as after dry.By controlling stalk addition, it can accomplish biogas slurry fully recovering, non-wastewater discharge.
Theoretical calculation is as follows：
House refuse：1000kg, aqueous 520kg.Wet separation obtain can not fermented material 400kg, wherein organic matter 180kg,
Inorganic matter（Include metal）60kg, water 160kg；Liquid 600kg, wherein, can fermented organic 150kg, inorganic matter 90kg, water
360kg。
Stalk：200kg, wherein, can fermented organic 152kg, inorganic matter 8kg, water 40kg.
Biogas slurry：5000kg, wherein containing 6% can not fermented material, i.e. 300kg, water content 4700kg.
Suspension material：5800kg, wherein Fermentable substrate matter 302kg, can not fermented material 398kg, water 5100kg, solid
Thing content 12%.
Rubbish and stalk can fermented organic total amount be 302kg, fermentation obtains biogas 180kg（150m3）, anaerobic digestion rate
60%。
Two-stage flash produces indirect steam 190kg, condenses heat release 453MJ, primary flash produces indirect steam 250kg, cold
Solidifying heat release 579MJ, biogas residue drying produce indirect steam 275kg, condensation heat release 621MJ.
Level-one preheats, and temperature of charge rises to 60 DEG C, it is necessary to which heat 363MJ, two level preheating, temperature of charge is by 60 DEG C by 45 DEG C
78 DEG C are risen to, it is necessary to which heat 450MJ, heating, temperature of charge rise to 100 DEG C, it is necessary to heat 577MJ by 78 DEG C.
Inventory is 5895kg, wherein solid content 520kg after anaerobic digestion, solid content 8.82%.Separation of solid and liquid obtains
To 6% biogas slurry 5000kg, 24.6% biogas residue 895kg.By drying, 275kg moisture is evaporated, obtains 620kg dried biogas residues, wherein solid
Thing 220kg, water 400kg are equal with the water in rubbish and stalk.
Dried biogas residues and can not fermented organic amount to 1020kg, wherein solid content 460kg, solid content 45%.Calorific value with
Crude waste is suitable.
Biogas calorific value is 21.5MJ/m3, generate electricity 358kwh, generating efficiency 40%.It is biogas that generator tail gas, which takes heat out of,
Caloric value 40%, is 903MJ for dry heat, utilization rate 70%.
It is 207MJ that biogas residue heating, which needs heat, and it is 621MJ that evaporation moisture, which needs heat, dry calorific requirement 828MJ altogether.
Indirect steam condenses heat release 1653MJ, heat loss 8%, efficient heat 1521MJ, and material preheating needs the heat to be
1390MJ, waste heat are used to rubbish and stalk being warming up to 45 DEG C.
The stalk direct generation of electricity, generated energy 1000kwh/t, the rubbish direct generation of electricity, generated energy 220kwh/t.1000kg rubbish
Rubbish and 200kg stalks can generate electricity 420kwh.Method using the present invention, can generate electricity 578kwh, wherein marsh gas power generation 358kwh, no
Can be fermented inorganic matter and dried biogas residues power generation 220kwh, increase by 37.6% compared with the direct generation of electricity.
Embodiment 3
A kind of domestic garbage resource processing method, technological process is as shown in figure 4, comprise the following steps：
1）House refuse is crushed through pulverizer, size≤20mm of the rubbish after crushing, metal recovery, enzymolysis, flotation, screening
Afterwards, obtaining can fermented organic；During metal recovery, the magnetic metal in house refuse is first isolated with magnetic separator, then it is golden with whirlpool electricity
Category removal machine isolates the nonmagnetic metal in house refuse；When separating the rubbish after metal into enzymolysis reactor enzymolysis, add
Enter the biogas slurry that follow-up workshop section returns, form rubbish suspension, while add complex enzyme, form mixture, solids in mixture
Matter content is no more than 12%, and complex enzyme is the mixture of cellulase, lipase and protease, per g house refuse cellulases
Dosage be 5 units, the dosage of lipase is 10 units, and the dosage of protease is 6 units；By the rubbish of enzymolysis, into floating
Machine is selected, using gas or liquid agitation, disperses house refuse, it settled, be layered under the effect of gravity, lower part is larger for density
Inorganic matter（Sand, glass, ceramics etc.）, can not fermented organic（Plastics, chemical fibre etc.）Float on top, centre is containing can ferment
The solution of organic matter（Castoff of food and drink, paper, pericarp, leaf etc.）, inorganic matter is discharged in flotation motor spindle, remainder enters sieve
Extension set, obtained after screening solid can not fermented organic and containing can fermented organic solution；
2）To step 1）Containing that can add stalk mixing in the solution of fermented organic, the dosage of stalk is crude waste dosage
20%, then crush（Particle size≤20mm）, preheating, hydro-thermal, insulation, flash distillation, fermented to the material after flash distillation, point
From, it is dry, obtain biomass fuel；Preheat as 4 grades of segmentation preheatings, respectively level-one preheating, two level preheating, three-level preheating, level Four
Preheating, flashes and is flashed for 4 grades of segmentations, as shown in figure 5, respectively primary flash, two-stage flash, three stages of flashing, level Four flash distillation, one
The heat source that indirect steam caused by level flash distillation is preheated as level Four, indirect steam caused by two-stage flash are preheated as three-level
Heat source, the heat source that indirect steam caused by three stages of flashing is preheated as two level, level Four flash distillation caused by indirect steam make
For the heat source of level-one preheating, the liquid after separation（Biogas slurry）Into enzymolysis process, rubbish is formed with separating the rubbish after metal and is hanged
Supernatant liquid, while add complex enzyme, in rubbish can fermented organic digested to be dissolved in the small-molecule substance rubbish of water, when dry
The indirect steam of generation is the heat source of hydro-thermal process.
Remaining liquid after fermentation methane is subjected to separation of solid and liquid, obtains biogas slurry and solid biogas residue, solid in biogas slurry
Content about 6%, the content about 25% of solid in biogas residue；Biogas slurry returns to enzymolysis reactor, and biogas residue becomes dried biogas residues after drying.
Material by hydro-thermal enters primary flash, and flash temperature is 130 DEG C, the heat that indirect steam is preheated as level Four
Source；The material of primary flash discharge enters two-stage flash device, and flash temperature is 100 DEG C, the heat that indirect steam is preheated as three-level
Source；The material of two-stage flash device discharge enters three stages of flashing device, and flash temperature is 75 DEG C, the heat that indirect steam is preheated as two level
Source；The material of three stages of flashing device discharge enters level Four flash vessel, and flash temperature is 55 DEG C, the heat that indirect steam is preheated as level-one
Source；The material of level Four flash vessel discharge enters fermentation tank.
The biogas produced that ferments generates electricity into gas-turbine, obtains electric power resource, supplies electric user；Tail gas of gas turbine, which enters, to be added
Hot device, the material that indirectly heat is discharged by preheater；The tail gas of gas turbine discharged by heater enters drier, is added using indirect
The mode of heat removes the moisture in wet biogas residue, obtains dried biogas residues；Kept the temperature by the tail gas of gas turbine of drier discharge for fermentation tank.
Dry biogas residue, the solid produced with assorting process mix, and obtain biomass fuel.
House refuse can be obtained by classifying and fermenting：Metal, as resource reclaim；Inorganic matter because yield compared with
Small, value is not high, as construction material or carries out landfill disposal；Can not fermented organic, when categorized wash, sieve, moisture,
Content of ashes is low, and calorific value is higher, as fuel or is pyrolyzed to obtain bio oil, combustion gas；Biogas, as power generation；Biogas residue, does
Biomass fuel is used as after dry.By controlling stalk addition, it can accomplish biogas slurry fully recovering, non-wastewater discharge.
Theoretical calculation is as follows：
House refuse：1000kg, aqueous 520kg.Wet separation obtain can not fermented material 400kg, wherein organic matter 180kg,
Inorganic matter（Include metal）60kg, water 160kg；Liquid 600kg, wherein can fermented organic 150kg, inorganic matter 90kg, water
360kg。
Stalk：200kg, wherein can fermented organic 152kg, inorganic matter 8kg, water 40kg.
Biogas slurry：5000kg, wherein containing 6% can not fermented material, i.e. 300kg, water content 4700kg.
Mixed material：5800kg, wherein Fermentable substrate matter 302kg, can not fermented material 398kg, water 5100kg, solid content
Content 12%.
Rubbish and stalk can fermented organic total amount be 302kg, fermentation obtains biogas 210kg（175m3）, anaerobic digestion rate
70%。
Level Four flash distillation produces indirect steam 221kg, condenses heat release 523MJ, three stages of flashing produces indirect steam 298kg, cold
Solidifying heat release 691MJ, two-stage flash produce indirect steam 392kg, condense heat release 886MJ, and primary flash produces indirect steam
438kg, condenses heat release 954MJ, and biogas residue drying produces indirect steam 250kg, condensation heat release 565MJ.
Level-one preheats, and temperature of charge rises to 55 DEG C, it is necessary to which heat 363MJ, two level preheating, temperature of charge is by 55 DEG C by 40 DEG C
75 DEG C are risen to, it is necessary to which heat 503MJ, three-level preheating, temperature of charge rise to 100 DEG C, it is necessary to which heat 664MJ, level Four are pre- by 75 DEG C
Heat, temperature of charge rise to 130 DEG C, it is necessary to heat 886MJ by 100 DEG C, heating, temperature of charge by 130 DEG C rise to 160 DEG C, it is necessary to
Heat 954MJ.
Inventory is 5840kg, wherein solid content 490kg after anaerobic digestion, solid content 8.39%.Separation of solid and liquid obtains
To 6% biogas slurry 5000kg, 22.6% biogas residue 840kg.By drying, 250kg moisture is evaporated, obtains 590kg dried biogas residues, wherein solid
Thing 190kg, water 400kg are equal with the water in rubbish and stalk.
Dried biogas residues and can not fermented organic amount to 990kg, wherein solid content 430kg, solid content 43.4%.Calorific value
It is suitable with crude waste.
Biogas calorific value is 21.5MJ/m3, generate electricity 397kwh, generating efficiency 38%.Generator tail gas takes heat out of
2333MJ, for being heated to be 954MJ, utilization rate 40.9%；It is 775MJ for drying, utilization rate 33.2%；Biogas comprehensive utilization rate
83.9%。
It is 210MJ that biogas residue heating, which needs heat, and it is 565MJ that evaporation moisture, which needs heat, dry calorific requirement 865MJ altogether.
Indirect steam condenses heat release 3054MJ, heat loss 8%, efficient heat 2810MJ, and material preheating needs the heat to be
2416MJ, waste heat are used to rubbish and stalk being warming up to 40 DEG C.
The stalk direct generation of electricity, generated energy 1000kwh/t, the rubbish direct generation of electricity, generated energy 220kwh/t.1000kg rubbish
Rubbish and 200kg stalks can generate electricity 420kwh.Method using the present invention, can generate electricity 615kwh, wherein marsh gas power generation 397kwh, no
Can be fermented inorganic matter and dried biogas residues power generation 218kwh, increase by 46.4% compared with the direct generation of electricity.
The course of work：Life crude waste is crushed into pulverizer first, size≤20mm of rubbish after crushing；
Then the metal in separating of garbage, separates the rubbish after metal and enters enzymolysis reactor, follow-up work is added in enzymolysis reactor
The biogas slurry that section returns, forms rubbish suspension, while adds complex enzyme, in rubbish can fermented organic digested to be dissolved in water
Small-molecule substance；Rubbish after enzymolysis, into flotation device, under stirring condition, disperses house refuse, makes it under the effect of gravity
Sedimentation, layering, lower floor are the larger inorganic matter of density（Sand, glass, ceramics etc.）, upper strata is can not fermented organic（Plastics, change
Fibre etc.）, middle level is can fermented organic（Castoff of food and drink, paper, pericarp, leaf etc.）Solution, flotation motor spindle discharge inorganic matter,
Remainder enters screening machine, and being obtained after screening can fermented organic solution.
Can fermented organic solution mix, crush by certain usage ratio with stalk, particle size≤20mm after crushing,
Mixture is preheated, the indirect steam that heat source produces for material flash distillation, by the way of direct contact heat transfer；Then pass to
The indirect steam that drying section produces, hydro-thermal process is carried out to mixed material；To the material after hydro-thermal process, 30 minutes are kept the temperature,
Flashed into flash column, the indirect steam of generation, as the heat source of preheating, by the material of flash distillation, into biogas fermentation
Tank, fermentation produce biogas discharge, remaining material is separated, and obtain biogas slurry and solid biogas residue, and biogas slurry returns to enzymolysis process, biogas residue
Become dried biogas residues after drying.
Claims (6)
1. a kind of domestic garbage resource processing method, it is characterised in that comprise the following steps：
1）By house refuse after crushing, metal recovery, enzymolysis, separation, obtaining can fermented organic；During enzymolysis, while add multiple
Synthase, complex enzyme are the mixture of cellulase, lipase and protease；
2）By step 1）Can be crushed, be preheated after fermented organic mixes with stalk, hydro-thermal, insulation, flash distillation, after flash distillation
Material ferment, obtain biomass fuel.
2. domestic garbage resource processing method as claimed in claim 1, it is characterised in that step 1）In per g house refuses
The dosage of cellulase is 5-150 units, and the dosage of lipase is 2-100 units, and the dosage of protease is 2-100 units；
The protease is neutral proteinase；Separation includes flotation, screening.
3. domestic garbage resource processing method as claimed in claim 1, it is characterised in that step 2）Two caused by flash distillation
Heat source of the secondary steam as preheating；Ferment to the material after flash distillation, then separate, is dry, the liquid after separation enters enzymolysis
Process.
4. domestic garbage resource processing method as claimed in claim 3, it is characterised in that step 2）Preheat as 2-5 fractions
Section preheating, flashes as 2-5 grades of segmentation flash distillations.
5. domestic garbage resource processing method as claimed in claim 4, it is characterised in that step 2）Preheat as 3 grades of segmentations
Preheating, is respectively that level-one preheats, two level preheats, three-level preheating, is flashed as 3 grades of segmentation flash distillations, respectively primary flash, two level sudden strain of a muscle
Steam, three stages of flashing.
6. domestic garbage resource processing method as claimed in claim 5, it is characterised in that secondary caused by primary flash
The heat source that steam is preheated as three-level, the heat source that indirect steam caused by two-stage flash is preheated as two level, during three stages of flashing
The heat source that the indirect steam of generation is preheated as level-one.
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| CN112222145A (en) * | 2020-09-17 | 2021-01-15 | 杭州楠大环保科技有限公司 | Preparation method of perishable garbage immobilized enzyme hydrolysis water |
| CN113597347A (en) * | 2019-03-29 | 2021-11-02 | 三菱重工业株式会社 | Waste treatment system and waste treatment method |
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