CN110452804A - A kind of organic waste dry-type anaerobic digestion device and method - Google Patents
A kind of organic waste dry-type anaerobic digestion device and method Download PDFInfo
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- 230000029087 digestion Effects 0.000 title claims abstract description 40
- 239000010815 organic waste Substances 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims description 18
- 238000002156 mixing Methods 0.000 claims abstract description 173
- 238000009826 distribution Methods 0.000 claims abstract description 11
- 239000002002 slurry Substances 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 45
- 238000007600 charging Methods 0.000 claims description 36
- 238000003756 stirring Methods 0.000 claims description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- 238000007599 discharging Methods 0.000 claims description 12
- 239000002893 slag Substances 0.000 claims description 9
- 230000008676 import Effects 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000002054 inoculum Substances 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 230000018044 dehydration Effects 0.000 claims description 5
- 238000006297 dehydration reaction Methods 0.000 claims description 5
- 239000004576 sand Substances 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 239000013049 sediment Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 2
- 239000010813 municipal solid waste Substances 0.000 abstract description 11
- 239000007787 solid Substances 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000010411 cooking Methods 0.000 abstract description 4
- 238000010907 mechanical stirring Methods 0.000 abstract description 3
- 239000012535 impurity Substances 0.000 abstract description 2
- 239000011368 organic material Substances 0.000 abstract description 2
- 238000007781 pre-processing Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 5
- 238000009827 uniform distribution Methods 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000002361 compost Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000010992 reflux Methods 0.000 description 3
- 239000010802 sludge Substances 0.000 description 3
- 239000010902 straw Substances 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 244000144977 poultry Species 0.000 description 2
- 230000001012 protector Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000003196 chaotropic effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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- 239000012895 dilution Substances 0.000 description 1
- 210000003608 fece Anatomy 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011081 inoculation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 244000144985 peep Species 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
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- 238000012546 transfer Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M21/00—Bioreactors or fermenters specially adapted for specific uses
- C12M21/04—Bioreactors or fermenters specially adapted for specific uses for producing gas, e.g. biogas
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- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
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- C12M27/00—Means for mixing, agitating or circulating fluids in the vessel
- C12M27/02—Stirrer or mobile mixing elements
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M41/00—Means for regulation, monitoring, measurement or control, e.g. flow regulation
- C12M41/12—Means for regulation, monitoring, measurement or control, e.g. flow regulation of temperature
- C12M41/18—Heat exchange systems, e.g. heat jackets or outer envelopes
- C12M41/24—Heat exchange systems, e.g. heat jackets or outer envelopes inside the vessel
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Abstract
The invention discloses a kind of organic waste dry-type anaerobic digestion devices, including anaerobic jar, mixing device, back-mixing feeding device, deslagging device, the anaerobic jar top inlet sets back-mixing feed distributor, the anaerobic jar top sets back-mixing feed surge device, back-mixing feed distributor feeds distribution pipe by back-mixing and connect with back-mixing feed surge device, mixing tank is connect by back-mixing feeding device with anaerobic jar, and deslagging device is set at anaerobic jar outlet at bottom.It is an advantage of the invention that, the organic waste that solid content 15-40% can be achieved automatically continuously produces natural pond, be especially suitable for the organic materials such as the high rubbish from cooking of impurity content, have take up little area, be low to pre-processing requirements, the advantage that biogas slurry low output, special equipment are few, low without mechanical stirring equipment, operation troubles rate in tank.
Description
Technical field
The invention belongs to organic garbage treatment technical fields, and in particular to organic waste dry-type anaerobic digestion device and side
Method.
Background technique
Organic waste of the present invention includes food garbage, rubbish from cooking, classification house refuse, fowl and animal excrement, agriculture and animal husbandry straw
The organic matters solid waste such as stalk, straw, municipal sludge, poultry of dying of illness.Since classification mechanism is not perfect in China, tradition has
Machine rubbish generallys use landfill, burning or aerobic compost processing mode.Due to the restriction using soil, landfill faces in China
More and more difficult location problem；Although burning can obtain preferable reduction, the higher organic rubbish of moisture content
Rubbish often greatly increases burning cost；Organic waste compost has a upper one-hundred-year history in China, but its there are odor pollution, produce
A series of problems, such as product outlet, causes aerobic compost thoroughly can not effectively solve the problems, such as that extensive organic waste centrally disposes.
And anaerobic digestion produces natural pond technology and organic waste can be turned waste into wealth, the biogas generated belongs to reproducible biomass
The energy belongs to the new energy that country encourages the substitute fossil fuels of development, and in the epoch of energy shortages in the world, this point is especially heavy
It wants.Anaerobic digestion techniques can be divided into dry type (solid content 15-40%) and wet type (solid content < according to the difference of charging solid content
15%) two major classes are digested.
In recent years, wet type anaerobic digestion techniques have obtained more application in the processing higher food garbage of moisture content, main
Reason is wanted to be that wet type anaerobic digestion is relatively low to input and output material and digestion facility requirement, but it brings that water consumption is big, detests simultaneously
Dross caused by oxygen tank interior laminate layer and sand setting accumulate problem, cause to produce natural pond interruption, and it is highly water intensive cause biogas slurry amount to increase, sewage
Processing cost dramatically increases.
Dry anaerobic digestion is intended to keep the original solid content state of organic waste to carry out digestion and produces gas, and only concentration is special
High material (solid content > 40%) just needs to be diluted with water.Therefore, it using dry anaerobic digestion technique, is not required to add water, reduction
Subsequent biogas slurry dehydration and cost of sewage disposal, while anaerobic jar is digested using high load capacity, anaerobism tank volume is compared with wet type anaerobic jar
It is small.
However, dry anaerobic digestion is relatively high to the equipment requirements such as input and output material and digestion stirring, the core technology at present
Substantially based on external import, mainly there are VALORGA, Belgian DRANCO, the KOMPOGAS of Switzerland and the Germany BTV of France
Technique, but the domestic company that independently can build and run dry type anaerobic technology is few, and the relevant technologies are still at an early stage, cause
The popularization and application of this technology are extremely restricted.From the point of view of the shape of dry type anaerobic jar, can be divided into it is horizontal and it is vertical two kinds it is dry
Formula anaerobic jar, and horizontal type dry anaerobic jar has land occupation greatly, and single tank volume can not do big disadvantage, the land occupation of vertical type anaerobic tank
Small and single tank dischargeable capacity is big, obtains extensive concern in recent years.
Summary of the invention
According to the deficiencies of the prior art described above, It is an object of the present invention to provide a kind of organic waste dry anaerobic digestions
Device realizes material by uniform distribution slow at the top of anaerobic jar, bottom discharge, so as to avoid the uneven charging short stream of bring
Problem.
To achieve the goals above, technical scheme is as follows: a kind of organic waste dry-type anaerobic digestion device,
It is characterized in that described device includes
Anaerobic jar, the anaerobic jar top set import, and bottom sets out mouth, and material knife valve, the anaerobism are set out above outlet at bottom
Tank top import sets back-mixing feed distributor, and the anaerobic jar top sets back-mixing feed surge device, and back-mixing feed distributor passes through
Back-mixing charging distribution pipe is connect with back-mixing feed surge device, is additionally provided with biogas gas outlet at the top of the anaerobic jar；
Mixing device, the mixing device include mixing tank, and mixing tank is connect by back-mixing feeding device with anaerobic jar, wherein returning
Mixed feeding device includes the feed back spiral for connecting mixing tank top opening and anaerobic jar outlet at bottom, connects anaerobic jar top inlet
With the back-mixing feed pipe of mixing tank outlet at bottom, the top opening of mixing tank is also connected with feedstock spiral, and mixing tank sets mixed
Batch can heat exchanger tube；
Deslagging device, the deslagging device are set at anaerobic jar outlet at bottom, and the deslagging device includes spiral of slagging tap, described
The input terminal for spiral of slagging tap is located at below discharging knife valve, and the output end of the spiral of slagging tap connects plunger pump of slagging tap, knife valve of slagging tap
Set on slagging tap between plunger pump and spiral of slagging tap.
Further, the back-mixing feeding device further includes the back-mixing plunger pump for being set to mixing tank outlet at bottom, is used for
The discharging of mixing tank is delivered to anaerobic jar top inlet through back-mixing feed pipe.
Further, the back-mixing feed pipe peripheral hardware insulating layer, and be also arranged around the back-mixing feed pipe in insulating layer
There is back-mixing to feed heat exchanger tube, back-mixing charging heat exchanger tube both ends set up hot water feed water inlet and hot water backwater mouthful separately.
Further, the top of mixing tank outlet at bottom sets mixing tank discharging knife valve, and back-mixing feeds heat exchanger tube and mixing tank
Junction is arranged back-mixing and feeds knife valve, the material for being sent into anaerobic jar for controlling mixing tank, and blender is arranged inside mixing tank, uses
In raw material to be uniformly mixed with anaerobic jar feed back, desanding double screw conveyor is arranged in mixing pot bottom.
Further, anaerobic jar is that cylinder bores bottom steel structural tank body, is laid out using bottom overhead type, bores bottom and horizontal sextant angle
50-60 °, cylindrical body ratio of height to diameter >=1:1.
Further, anaerobic jar cone bottom top sets more biogas stirring diffusers on the inside of tank skin, and the more biogas stirs
It mixes diffuser to connect with the biogas stirring endless tube being looped around on the outside of anaerobic jar, biogas stirring endless tube is connected to by biogas communicating pipe
The output end of biogas compressor, the input of biogas compressor terminate the biogas gas outlet at the top of anaerobic jar, and biogas stirs diffuser
Biogas mixing control valve group is set between biogas stirring endless tube.Biogas compressor exports biogas, stirs endless tube by biogas and enters
Biogas stirs diffuser, successively carries out biogas stirring by PLC control, with the mixing effect of reinforced anaerobic tank, while avoiding material
In cylinder and cone bottom intersection accumulation.Biogas stirs the lateral aperture of diffuser, and biogas is projected from hole with material in agitator tank.
Further, back-mixing feed surge device bottom is in the cone structure of indent, and cone angle is 100-150 °, cone diameter
0.5-2m can avoid material freely falling body and be directly entered after tank body to form short stream to the impact of material in tank.
Further, anaerobic jar top is additionally provided with dross discharge nozzle, and the dross discharge nozzle is connected to plunger pump of slagging tap, and leads to
Slag tap plunger pump and valve control are crossed, it can be achieved that top dross discharge or the dross discharge nozzle are connected to set on anaerobic jar bottom
The bottom dross return pipe in portion, returns in anaerobic jar through bottom dross return pipe, to realize anaerobic jar from top to bottom light
Substance circulation.
Further, bottom valve is set in anaerobic jar bottommost respectively, desanding double helix is set in mixing pot bottom, when daily
When deslagging is unable to satisfy system sediment outflow demand, periodically by anaerobism pot bottom bottom valve and mixing pot bottom desanding double helix, will be
Outside the regular removal system of sand setting in system.
In place of according to above-mentioned the deficiencies in the prior art, a kind of organic waste dry type anaerobism is provided
Digestion method realizes material by uniform distribution slow at the top of anaerobic jar, bottom discharge, so as to avoid uneven charging bring
Short flow problem.
To achieve the goals above, technical scheme is as follows: a kind of organic waste dry anaerobic digestion method,
Be characterized in that method includes the following steps:
Feedstock spiral can be used for the material that anaerobic digestion is inoculated with to mixing tank input, by back-mixing feeding device by inoculum
Be delivered in anaerobic jar, inoculum concentration accounts for the 20-50% of anaerobic jar total measurement (volume), while start mixing tank heat exchanger tube and back-mixing charging change
Heat pipe will be increased to 35 ± 2 DEG C into tank temperature of charge, gradually increase inlet amount, until anaerobic jar starts to produce biogas；
Anaerobism charging, organic waste are threaded into mixing tank by feedstock, are detested by feed back spiral and feed auger control
Oxygen pot bottom feed back and material rate open back-mixing plunger pump in 5-10/1, by mixed material send to back-mixing at the top of anaerobic jar into
Expect in distributor, then distribution pipe is fed by back-mixing, through in back-mixing charging back-mixing feed surge device overflow to anaerobic jar；
While anaerobism is fed, slag tap spiral and plunger pump of slagging tap are opened, anaerobic digestion biogas slurry is sent to dehydration machine room.
Further, dross discharge nozzle is arranged in anaerobism tank body top, by plunger pump and the valve control of slagging tap, realizes top
Dross discharge or top dross return in anaerobic jar through bottom dross return pipe, to realize anaerobic jar from top to bottom light
Substance circulation.
The present invention realizes material by anaerobism by mixing device, back-mixing feeding device, deslagging device and biogas stirring device
The slow uniform distribution in tank top, bottom discharge, so as to avoid the uneven charging short flow problem of bring；Simultaneously by reflux unit
Auxiliary stirred with biogas, replace traditional mechanical stirring, equipment attrition is less, thus effectively solve dry type anaerobism tank charging/discharging and
The problems such as stirring；By setting top dross outlet and reflux unit, it can be achieved that while light material removes, light material is realized
From top to bottom recycle；By hot water circuit indirect heat exchange mode, avoids traditional vertical dry type anaerobism and brought using steam direct-injection
Material water ratio increase problem；By anaerobism pot bottom bottom valve and mixing pot bottom desanding double helix, avoid in system
The problem of sand setting can not be discharged in time.It is an advantage of the invention that can realize that the organic waste of solid content 15-40% automatically continuously produces
Natural pond is especially suitable for the organic materials such as the high rubbish from cooking of impurity content, have take up little area, be low to pre-processing requirements, biogas slurry yield
Advantage low, special equipment is few, low without mechanical stirring equipment, operation troubles rate in tank.
Detailed description of the invention
Fig. 1 is organic waste dry-type anaerobic digestion device schematic diagram in the present invention.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is that back-mixing feeds back-mixing feed surge device schematic diagram.
Fig. 4 is that biogas stirs pipeline floor map.
Fig. 5 is that biogas stirs pipeline diagrammatic cross-section.
Fig. 6 is that back-mixing feeds back-mixing feed distributor schematic diagram.
Fig. 7 is the top view of Fig. 6.
Specific embodiment
Feature of the invention and other correlated characteristics are described in further detail by embodiment below in conjunction with attached drawing, with
Convenient for the understanding of technical staff of the same trade.
Heretofore described organic waste includes food garbage, rubbish from cooking, classification house refuse, fowl and animal excrement, agriculture
Stalk, straw, municipal sludge, poultry of dying of illness etc. are herded, includes: feedstock spiral 1 in figure, mixing tank 2, back-mixing feed pipe 3, mix
Batch can heat exchanger tube 4, back-mixing charging heat exchanger tube 5, feed back spiral 6, feed back charging knife valve 7, mixing tank discharging knife valve 8, back-mixing plunger
Pump 9, back-mixing charging knife valve 10, back-mixing feed distributor 11, back-mixing feed distribution pipe 12, back-mixing feed surge device 13, positive/negative-pressure
Protector 14, biogas escape pipe 15, plunger pump 16 of slagging tap, biogas compressor 17, biogas mixing control valve group 18, biogas stirring are expanded
Separate tube 19, anaerobic jar insulating layer 20, color steel plate 21, dross discharge nozzle 22, dross return pipe 23, discharging knife valve 24, spiral of slagging tap
25, it slags tap knife valve 26, back-mixing feed pipe insulating layer 27, compressed biogas entrance 28, hot water feed water inlet 29, hot water backwater mouthfuls 30, floating
The outer comb 31 of slag, anaerobism tank body 32, biogas stir endless tube 33, back-mixing feed surge device 34, mixing jar agitator 35, mixing tank bottom
Portion's double helix 36, anaerobism bottom valve 37.
As shown, a kind of organic waste dry-type anaerobic digestion device, it is characterised in that described device includes
Anaerobic jar, the anaerobic jar top set import, and bottom sets out mouth, and material knife valve, the anaerobism are set out above outlet at bottom
Tank top import sets back-mixing feed distributor 11, and the anaerobic jar top sets back-mixing feed surge device, back-mixing feed distributor 11
Distribution pipe 12 is fed by back-mixing to connect with back-mixing feed surge device 13, is additionally provided with biogas escape pipe 15 at the top of the anaerobic jar；
Mixing device, the mixing device include mixing tank 2, and mixing tank 2 is connect by back-mixing feeding device with anaerobic jar, wherein
Back-mixing feeding device includes the feed back spiral 6 for connecting mixing tank top opening and anaerobic jar outlet at bottom, connection anaerobic jar top
The back-mixing feed pipe 3 of import and mixing tank outlet at bottom, the top opening of mixing tank are also connected with feedstock spiral 1, mixing
Mixing tank heat exchanger tube 4 is set in tank；
Deslagging device, the deslagging device are set at anaerobic jar outlet at bottom, and the deslagging device includes spiral 25 of slagging tap, institute
The input terminal for stating spiral 25 of slagging tap is located at 26 lower section of discharging knife valve, and the output end of the spiral of slagging tap connects plunger pump 16 of slagging tap,
It slags tap and sets out slag knife valve 26 between plunger pump and spiral of slagging tap.
Anaerobism tank body 32 is that cylinder bores bottom steel structural tank body, is laid out using bottom overhead type, cone bottom and horizontal sextant angle 50-
It 60 °, is fed using 3 point type uniform distribution mode of top, the input and output material mode of bottom discharge.Wherein the charging of 3 point types of top is by 1
11,3 back-mixing charging 12,3 back-mixing feed surge devices 13 of distribution pipe of back-mixing feed distributor form.Back-mixing feed surge device is adopted
With cone structure, 100-150 ° of angle of cone α, cone diameter 0.5-2m, can avoid after material freely falling body is directly entered tank body
Short stream is formed to the impact of material in tank.Dedicated dross discharge nozzle 22 is arranged in anaerobism tank body top, passes through plunger pump of slagging tap
And valve control is, it can be achieved that top dross is discharged, or returns in anaerobic jar through bottom dross return pipe 23, to realize anaerobism
The light materials circulation of tank from top to bottom.3 peripheral hardware mixed feeding heat exchanger tube 5 of back-mixing feed pipe and back-mixing feed pipe insulating layer 27 mix
Close charging 5 both ends of heat exchanger tube and set up hot water feed water inlet and hot water backwater mouthful separately, in such a way that hot water is added in hot water feed water inlet come
It improves into tank temperature of charge.
Embodiment: the present embodiment is specifically related to a kind of vertical dry-type anaerobic digestion device of organic waste and method, the dry type
Anaerobic digestion device is operated by the following method (i.e. principle):
Inputting dehydration biogas residue, sludge, river bottom mud, cow dung etc. to mixing tank 2 using feedstock spiral 1 can be used for anaerobic digestion
Inoculum is delivered in anaerobic jar by the material of inoculation by mixing device and feed back feeding device, and it is total that inoculum concentration accounts for anaerobic jar
The 20-50% of volume, at the same start mixing tank heat exchanger tube 4 and back-mixing charging heat exchanger tube 5 will be increased to 35 ± 2 into tank temperature of charge
DEG C, inlet amount is gradually increased, until anaerobic jar starts to produce biogas, gradually increases inlet amount to Design cooling load, feed process are as follows: warp
It crosses pretreated organic waste and mixing tank 2 is entered by feedstock spiral 1, open discharging knife valve 24, open feed back spiral
6, it opens feed back and feeds knife valve 7, and knife valve 7 is fed by feed back spiral 6 and feed back and controls anaerobism pot bottom feed back and raw material ratio
Example opens mixing jar agitator in 5-10/1 or so, opens mixing tank discharging knife valve 8, opens back-mixing plunger pump 9 and back-mixing charging
Knife valve 10 send mixed material into 3 top back-mixing of anaerobic jar charging back-mixing feed distributor 11, then passes through 3 back-mixing chargings
Back-mixing feeds distribution pipe 12, to reduce mixed material feed flow rate, is arranged immediately below back-mixing charging back-mixing charging distribution pipe 12
Back-mixing feeds back-mixing feed surge device 13, and mixed material is fed in the device overflow to anaerobic jar of back-mixing feed surge by back-mixing.Detest
While oxygen is fed, spiral 25 of slagging tap is opened, knife valve 26 of slagging tap is opened, opens plunger pump 16 of slagging tap, anaerobic digestion biogas slurry is sent
To dehydration machine room.While anaerobism is fed, biogas compressor 17 is opened, is expanded by biogas mixing control valve group 18 and biogas stirring
Separate tube 19 successively carries out biogas stirring by PLC control, with the mixing effect of reinforced anaerobic tank, while avoid material in cylinder and
Bore the accumulation of bottom intersection, it is contemplated that top dross discharge nozzle, benefit is arranged in influence of the dross to anaerobic jar at the 1-1.5m of chaotropic position
With slagging tap, plunger pump 16 is discharged, or by valve transfer, is sent through dross return pipe to anaerobism pot bottom, to realize light material
From top to bottom recycle.
Anaerobic jar is formed using welding for steel structure, and bottom is supported by Reinforced Concrete Structure, and anaerobic jar 3 is cylinder centrum, can root
Change tank body size (anaerobic jar cylindrical portion ratio of height to diameter >=1:1) according to treatment scale, anaerobism tank wall is arranged anaerobic jar and keeps the temperature
20(rock wool 100-200mm), outer wall color steel plate 21 is arranged outside and protects for insulating layer.Anaerobic jar uses hot water circulation heated mode, leads to
It crosses mixer heat exchanger tube 4 and back-mixing charging heat exchanger tube 5 and maintains temperature in anaerobic jar 3 to maintain by temperature automatic feedback control
35±2℃。
Back-mixing feed pipe caliber 250-500mm, back-mixing feed distribution pipe caliber 200-400mm, and outer wall setting hot water follows
Ring heat exchanger tube and temperature feedback control system accurately control the temperature of charge into anaerobic jar by controlling hot water circuit amount.
Biogas stirring device is arranged in anaerobic jar cylinder and centrum intersection, by PLC control biogas stirring valve group (circumferentially side
To facility 10-20 group), material homogenizing effect is further increased by biogas stirring, while anaerobic jar cylinder and centrum being avoided to hand over
The accumulation of material at boundary.
When daily deslagging is unable to satisfy system sediment outflow demand, periodically pass through anaerobism pot bottom bottom valve 37 and mixing pot bottom
Desanding double helix 36, will be outside the regular removal system of sand setting in system.
Anaerobic jar be arranged positive/negative pressure protector, biogas escape pipe, biogas foam separator, manhole, peep hole, pressure gauge,
The affiliated facilities such as thermometer, pH meter.
The beneficial effect of the present embodiment is: boring bottom anaerobic jar using vertical type cylinder, the dry type anaerobism being greatly saved accounts for
Ground.Dry type anaerobic jar is entered by top, bottom discharge, and is constantly recycled by mixing tank, in addition biogas stirring device, greatly
The stirring of material and homogeneous in anaerobic jar are increased, while reducing anaerobism pot bottom blocking risk.Pass through returning for special designing
Mixed feed distributing apparatus and back-mixing feed back-mixing feed surge device, while realizing charging uniform distribution, greatly reduce top
Bring influence is directly impacted in charging on material in anaerobic jar.It is by setting top dross outlet and reflux unit, it can be achieved that light
While the material that floats removes, realize that light material from top to bottom recycles, to solve the accumulation of upper entering and lower leaving bring tank deck dross
Problem.The heating device of special designing avoids the dilution of steam direct-injection bring material, biogas slurry increases problem and pressure pipeline wind
Dangerous problem, by hot water circuit feedback control, temperature of charge control is higher compared with steam direct-injection mode precision.
Therefore, no matter from the point of view of land occupation, operation control etc., the present apparatus is all obtained compared with other dry-type anaerobic digestion devices
It greatly improves.
Claims (11)
1. a kind of organic waste dry-type anaerobic digestion device, it is characterised in that described device includes
Anaerobic jar, the anaerobic jar top set import, and bottom sets out mouth, and material knife valve, the anaerobism are set out above outlet at bottom
Tank top import sets back-mixing feed distributor, and the anaerobic jar top sets back-mixing feed surge device, and back-mixing feed distributor passes through
Back-mixing charging distribution pipe is connect with back-mixing feed surge device, is additionally provided with biogas gas outlet at the top of the anaerobic jar；
Mixing device, the mixing device include mixing tank, and mixing tank is connect by back-mixing feeding device with anaerobic jar, wherein returning
Mixed feeding device includes the feed back spiral for connecting mixing tank top opening and anaerobic jar outlet at bottom, connects anaerobic jar top inlet
With the back-mixing feed pipe of mixing tank outlet at bottom, the top opening of mixing tank is also connected with feedstock spiral, and mixing tank sets mixed
Batch can heat exchanger tube；
Deslagging device, the deslagging device are set at anaerobic jar outlet at bottom, and the deslagging device includes spiral of slagging tap, described
The input terminal for spiral of slagging tap is located at below discharging knife valve, and the output end of the spiral of slagging tap connects plunger pump of slagging tap, knife valve of slagging tap
Set on slagging tap between plunger pump and spiral of slagging tap.
2. a kind of organic waste dry-type anaerobic digestion device according to claim 1, it is characterised in that the back-mixing charging
Device further includes the back-mixing plunger pump for being set to mixing tank outlet at bottom, for conveying the discharging of mixing tank through back-mixing feed pipe
To anaerobic jar top inlet.
3. a kind of organic waste dry-type anaerobic digestion device according to claim 1, it is characterised in that the back-mixing charging
Pipe peripheral hardware insulating layer, and the back-mixing feed pipe is also provided with back-mixing charging heat exchanger tube, back-mixing charging heat exchange in insulating layer
Set up hot water feed water inlet and hot water backwater mouthful separately in pipe both ends.
4. a kind of organic waste dry-type anaerobic digestion device according to claim 1, it is characterised in that mixing pot bottom goes out
The top of mouth sets mixing tank discharging knife valve, and back-mixing feeds heat exchanger tube and mixing tank junction setting back-mixing charging knife valve, for controlling
System is sent into the material of anaerobic jar, meanwhile, blender is set inside mixing tank, for raw material to be uniformly mixed with anaerobic jar feed back,
Desanding double screw conveyor is arranged in mixing pot bottom.
5. a kind of organic waste dry-type anaerobic digestion device according to claim 1, it is characterised in that anaerobic jar is cylinder
Bore bottom steel structural tank body, using bottom overhead type be laid out, cone bottom with 50-60 ° of horizontal sextant angle, tank body cylindrical portion ratio of height to diameter >=
1:1.
6. a kind of organic waste dry-type anaerobic digestion device according to claim 5, which is characterized in that anaerobic jar is bored on bottom
Portion sets more biogas stirring diffusers, the natural pond more biogas stirring diffuser and be looped around on the outside of anaerobic jar on the inside of tank skin
The connection of gas agitating endless tube, biogas stirring endless tube are connected to the output end of biogas compressor, biogas compressor by biogas communicating pipe
Input termination anaerobic jar at the top of biogas gas outlet, biogas stirring diffuser and biogas stirring endless tube between sets biogas stirring control
Valve group processed.
7. a kind of organic waste dry-type anaerobic digestion device according to claim 1, it is characterised in that back-mixing feed surge
Device bottom be in indent cone structure, cone angle be 100-150 °, cone diameter 0.5-2m, can avoid material freely falling body directly into
Enter and short stream is formed to the impact of material in tank after tank body.
8. a kind of organic waste dry-type anaerobic digestion device according to claim 1, it is characterised in that anaerobic jar top is also
Equipped with dross discharge nozzle, the dross discharge nozzle is connected to plunger pump of slagging tap, by slag tap plunger pump and valve control, it can be achieved that
Top dross discharge or the dross discharge nozzle are connected to the bottom dross return pipe set on anaerobism pot bottom, through bottom dross
Return pipe returns in anaerobic jar, to realize the light materials circulation of anaerobic jar from top to bottom.
9. a kind of organic waste dry anaerobic digestion method, it is characterised in that method includes the following steps:
Feedstock spiral can be used for the material that anaerobic digestion is inoculated with to mixing tank input, by back-mixing feeding device by inoculum
Be delivered in anaerobic jar, inoculum concentration accounts for the 20-50% of anaerobic jar total measurement (volume), while start mixing tank heat exchanger tube and back-mixing charging change
Heat pipe will be increased to 35 ± 2 DEG C into tank temperature of charge, gradually increase inlet amount, until anaerobic jar starts to produce biogas；
Anaerobism charging, organic waste are threaded into mixing tank by feedstock, pass through time opening feed back spiral and charging spiral shell
Rotation control anaerobism pot bottom feed back and material rate open mixing jar agitator, open back-mixing plunger pump, will mix in 5-10/1
Material is sent into back-mixing feed distributor at the top of anaerobic jar, then feeds distribution pipe by back-mixing, slow through back-mixing charging back-mixing charging
It rushes in device overflow to anaerobic jar；
While anaerobism is fed, slag tap spiral and plunger pump of slagging tap are opened, anaerobic digestion biogas slurry is sent to dehydration machine room.
10. a kind of organic waste dry anaerobic digestion method according to claim 1, which is characterized in that on anaerobism tank body
Dross discharge nozzle is arranged in portion, by plunger pump and the valve control of slagging tap, realizes that top dross discharge or top dross are floating through bottom
Slag return pipe returns in anaerobic jar, to realize the light materials circulation of anaerobic jar from top to bottom.
11. a kind of organic waste dry anaerobic digestion method according to claim 1, which is characterized in that respectively in anaerobism
Bottom valve is arranged in tank bottommost, and desanding double helix is arranged in mixing pot bottom, when daily deslagging is unable to satisfy system sediment outflow demand,
It, will be outside the regular removal system of sand setting in system periodically by anaerobism pot bottom bottom valve and mixing pot bottom desanding double helix.
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