CN101457202A

CN101457202A - Rubbish anaerobic fermentation method and device

Info

Publication number: CN101457202A
Application number: CNA2007101968927A
Authority: CN
Inventors: 庄维健
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-12-11
Filing date: 2007-12-11
Publication date: 2009-06-17

Abstract

The invention discloses a rubbish anaerobic fermentation method and a device belonging to the domestic refuse treatment project field. The main point of the invention is to provide a cylindrical silo with ''flexible silo body'' characteristic to sealing store the rubbish for a long time. The advantages are as follows: 1. because the cylindrical silo body is thin, the cylindrical silo cost is low even the capacity is large; 2. the crude rubbish can go in the cylindrical silo without sorting and other interference besides often spraying sewage water, the operation cost is low; 3. the maturity period is long enough to make sure the rubbish to age thoroughly and generate large marsh gas, the economic efficiency is good; 4. the cylindrical silo has a large capacity and the enough long maturity period can consume large external drainage wastewater, which obtains effect of treating pollution by using pollution; 5. the rubbish in the cylindrical silo is completely isolated with the external environment, which realizes zero pollution of the environment benefit; 6. the thorough maturity process is especially suitable for the following comprehensive treatment process such as mechanical sorting, organic fertilizer preparation, brick making, burning or the like.

Description

A kind of rubbish anaerobic fermentation method and device

Technical field

The present invention relates to a kind of rubbish anaerobic fermentation method and device, belong to domestic refuse treatment project field.

Background technology

Domestic refuse mainly contains two kinds by the prior art that anaerobically fermenting obtains biogas at present:

The first obtains biogas from refuse landfill.The advantage of this method is that procurement cost is low, treats that the landfill yard landfill waste is abundant, and normally when being about to closing, direct cannulation goes into by the extraction of landfill waste depths to get final product.The shortcoming of this method is that anaerobic methane production efficient is poor, and atmosphere pollution, this is because landfill yard is in wide-open environment, in the rubbish can the rotten organism overwhelming majority be to become thoroughly decomposed at good oxygen condition (or half good oxygen condition), several years such as have only even make more than 10 years when before enough thick rubbish tectum (generally about 10 meters) being arranged by the landfill waste top, could really make before to be in anaerobic state by landfill waste, but this moment in the rubbish can rotten organism seldom.But we can feel still that sometimes the category sludge gas amount is very big, and that only is because by the quantity of refuse of the landfill cause that is too big really.

It two is rubbish to be stored in the sealed vessel through anaerobically fermenting obtain biogas.The advantage of this method is to obtain biogas efficient height because in the rubbish can rotten organism be in substantially fully become thoroughly decomposed in the anaerobic environment stable.Weak point is that to expend cost too high, mainly expends: refuse classification (organic waste is sorted out), organic waste are pulverized and are forced to stir and ventilation etc.All these cost costs all are to become thoroughly decomposed as early as possible in order to quicken organic waste, shorten the anaerobically fermenting cycle, generally can be controlled in 30 days.

The enough subsidies of anarchy although consequently the biogas benefit is fine, but still are not enough to offset cost, if will be difficult to keep on the go.

Existing storing bulk material silo generally adopts steel construction or skeleton construction, finishes in case build, and its warehouse height all is changeless.The warehouse material is except that satisfying the requirement of strength, adequate thickness also must be arranged to form the rigidity that whole silo body has resistance to deformation, so just can guarantee no matter buy securities with all one's capital or hole capital after selling all securities in the silo, whole silo body all is stable, we are referred to as " rigidity silo " this silo, and existing silo belongs to the rigidity silo substantially.

Because of the warehouse thickness of rigidity silo is to thicken with the silo capacity, so if build large vol rigidity silo, cost can be very expensive.

Summary of the invention

The present invention approves of and adopts the sealed vessel high-level efficiency to obtain the technical scheme of biogas, but some notional innovations are arranged in addition: think that expending the great number operating charges is used for forcing the shortening garbage anaerobic fermentation cycle to there is no need fully, exactly think on the contrary and can utilize long characteristic of rubbish nature anaerobically fermenting cycle to eliminate external sewage, and further simultaneously increase biogas benefit.Thereby the destructor plant of setting up by the inventive method still sewage work simultaneously, sewage is eliminated factory more precisely, because the net result of sewage disposal is zero release.

Technical scheme of the present invention is: adopt a kind of method of silo body height dynamic change that makes to build silo with vast capacity, because it is this method can make silo body do very thinly, therefore cheap.

Because silo body of the present invention is very thin, so the stable silo inner stuffing material that must rely on of bed rearrangement silo supports, if material increases in the silo, then silo body should increase, otherwise, as if the minimizing of the interior material of silo then silo body must descend thereupon.If it is stable that very thin silo body in the filling support that is not having material than big vertical direction spatial, will be difficult to keep, perhaps a gust of wind can blow down it, so silo of the present invention has " flexible warehouse " feature.

The present invention adopts a plurality of rubbish silos that domestic refuse is implemented totally-enclosed anaerobically fermenting, not sorting of crude waste (i.e. " new refuse ") the static anaerobically fermenting in the silo of directly packing into, except that regular spray sewage to keep the rubbish high humidity, do not carry out other artificial and mechanical intervention.Carrying out the subsequent technique processing through reaching the domestic refuse taking-up that to become thoroughly decomposed thorough again after several months even 1 year.

Rubbish needs to consume large quantity of moisture in anaerobic fermentation process, it is far from being enough only relying on the water content of this life of rubbish in the digest process that reaches several months even 1 year, draw sewage outside so just needing to replenish and enter silo top spray rubbish, often keep in the silo rubbish high-moisture and help the anerobe breeding, increase biogas output and the acceleration process of becoming thoroughly decomposed, every day, an amount of for several times spray sewage just seemed necessary like this, after several months even 1 year, the spray sewage quantity of accumulative total will be very considerable.

Be provided with sludge gas collecting device in the sealing silo, the biogas of discharge is produced by two aspects: the anaerobically fermenting of first rubbish; It two is anaerobic digestions of sewage, and concentration of wastewater is higher, and the biogas amount of generation is many more.

Domestic refuse can not produce pollution after becoming thoroughly decomposed thoroughly substantially again, is very beneficial for multiple comprehensive processing technique thereafter yet, as mechanical sorting, making fertilizer, burning, brickmaking, even landfill etc.

Description of drawings

Below in conjunction with accompanying drawing specific implementation method of the present invention is described in further detail:

Fig. 1 is the silo longitudinal diagram, that is: the C among Fig. 2-C section;

Fig. 2 is the silo flat sectional drawing, that is: the A among Fig. 1-A section;

Fig. 3 is another flat sectional drawing of silo, that is: the B among Fig. 1-B section;

Fig. 4 is the node drawing of silo body and silo top covering place, that is: the E node among Fig. 1;

Fig. 5 is single warehouse piece vertical planning drawing;

Fig. 6 is the single warehouse piece vertical planning drawing after stiffening web is reinforced;

Fig. 7 is the silo body vertical planning drawing (part) by a plurality of warehouse piece assemblings;

Fig. 8 is the silo body sectional drawing, i.e. D among Fig. 7-D section;

Fig. 9 is that silo top flexible cloth covers sealing-U type folder scheme;

Figure 10 is that silo top duricrust cover covers sealing-U type folder scheme;

Figure 11 is that silo top duricrust cover covers sealing-bolted scheme;

Mark in the accompanying drawing: 1 sewage lagoon; 2 base plates; 3 pool walls; 4 buttresses; 5 flase floors; 6 wet wells; 7 times water arms; 8 silo bodies; 9 silos top covers (flexible cloth); 10 sludge gas collecting devices; 11 exhaust branch pipes; 12 spray equipments; Water arm on 13; 14 rubbish; 15 sewage; 16 ground; 17 sealing petticoats; 18 warehouse pieces; 19. warehouse piece skeleton frame; 20 warehouse piece plates; 21 bolts; 22 stiffening webs; 23 channel-section steels; 24 steel pipes; 25 ropes; 26 silos top covers (duricrust cover); 27U type folder; 28 rectangular filling pads; 29 bar shaped pads; 30 flanges

Specific implementation method

Embodiment: the somewhere needs day processing 230 cubic metres of domestic refuses (being about 180 tons after the natural compacting in silo), and supposing needed sealed storage 8 months after rubbish puts in storage (being the rubbish decomposed period), and then rubbish silo design considerations is as follows:

Plan to build 20 meters of rubbish silo diameters, 22 meters of center line averages, then single silo volume is about 6900 cubic metres, per diem advances 230 cubic metres of meters of rubbish, and whenever filling 1 silo needs one-month period.As storing 8 months by rubbish is a decomposed period, then needs to build 10 rubbish silos altogether and can satisfy and recycle.During normal operation, there are 8 silos to be in all the time and fill sealed state, 1 discharging of all the other 1 chargings is in open state, can not count decomposed period.

Fill 1 silo and need one-month period to calculate by above-mentioned, if also need to prolong decomposed period, 1 silo of then every increase just can make decomposed period prolongation 1 month.

Details are as follows for concrete enforcement work flow:

1. garbage feeding

1.1. to the charging silo, unloading rubbish, dumper transportation crude waste goes into to place barrel on the ground 16.

1.2. gantry crane promotes barrel to the charging silo scope of operation, unloads rubbish and goes in the silo.

1.3. Steel Concrete sewage lagoon

Scheme one: lay a drainage layer on 2 of sewage lagoon 1 tank-top plates, material requested is as plastics french drain, flexible porous tube, rubble and grid filter screen etc.The rubbish that puts in storage is poured over sewage lagoon drainage layer end face, and the drainage layer filters sewage and enters sewage lagoon 1 bottom wet well 6, again through water arm 7 discharges down.This scheme rubbish 14 and sewage 15 in sewage lagoon 1 are to mix to store, and it is less that sewage lagoon 1 stores sewage 15 capacity.

Scheme two: see Fig. 1, be provided with a plurality of buttresses 4 in sewage lagoon 1, set up flase floor 5 on the buttress 4, rubbish 14 is deposited on the flase floor 5, and sewage flows into sewage lagoon 1 in the rubbish 14 through flase floor 5 spaces.This scheme has only sewage 15 not have rubbish 14 in sewage lagoon 1, so sewage 15 storage volumes are bigger.Recommend to adopt this scheme.

1 time water arm 7 of each silo sewage lagoon all should be installed control valve, and under meter etc. inserts supply mains down again, and following supply mains connects the sump pump water-in.

Draw sewage outside considering, can replenish water arm 7 under the external sewage, external sewage must could insert down the supply mains after filtering.

1.4. assembled pot warehouse

Assembling warehouse piece 18 in continuing fill process makes silo body 8 constantly increase with rubbish 14 storage capacitys and raises.

The making method of warehouse piece 18: see Fig. 5, select for use the L4 equal legged angle to be made into 0.777 meter of a length, high 0.5 meter rectangle frame 19, around rectangle frame 19, press size position auger shell keyhole, so that adjacent warehouse piece 18 with other adopts bolt 21 splicings, joining method is similar to common " flange " and connects.Get a length and width size and all be slightly less than rectangle frame 19 and thick 1 millimeter steel sheet 20, steel sheet 20 4 side welds are connect or rivet clasp on rectangle frame 19, whole monolithic warehouse piece 18 is heavy 8.5 kilograms, carrying and install all very convenient.

If needed, can also replenish stiffening web 22 at rectangle frame 19 four jiaos, as shown in Figure 6.Also have the multiple strong method that adds in addition, as: at rectangle frame 19 4 welded corner joint triangle sticker gussets; Rectangle frame 19 diagonal lines intersection welding stiffening web 22; And stiffening web 22 laterally or vertical arrange etc.

In practice of construction, the angle steel of market purchasing all is linear, and the angle steel resistance to deformation is very capable, is difficult to bending.So as the warehouse piece 18 of attempting to make by angle steel bend to meet the silo radius curved slab relatively the difficulty.It is suitably less than normal to design warehouse piece 18 length dimensions for this reason, and warehouse piece 18 just can be made into the straight plate of no arc surface like this, encloses a Polygons by numerous straight plates and can form an approximate circle that meets the silo radius of circle.Warehouse piece 18 sizes are less than normal in addition also helps a dead lift and installation.

For silo body 8 is effectively sealed, when assembling warehouse piece 18, should accomplish: one, at each warehouse piece 18 splicing seams places folder gasket seal or be coated with sealing compound; Two, paste sealed strip along warehouse piece 18 splicing seams places at silo body 8 inwalls; Three, paste sealing petticoat 17 at silo body 8 inwalls.

If the vertical splicing seams between the adjacent levels warehouse piece 18 shifts to install, will make silo body 8 inwalls produce many triangular depression convex surfaces, this is because the warehouse piece 18 of assembled pot warehouse 8 is not arc plate but the cause of straight plate, so only make vertical splicing seams between the warehouse piece 18 all along the silo body 8 vertical elongated (see figure 7)s that are provided with, could cancel the triangular depression convex surface of silo body 8 inwalls, its purpose is exactly for the sealing petticoat 17 that sticks on silo body 8 inwalls can being combined closely with it, not staying any space.

In particular cases, if can be customized to the angle steel of band camber line, and produce the warehouse piece 18 that meets the silo circular arc, the constraint that not can not shift to install by above-mentioned vertical splicing seams to producer.

In addition, all relate to silo structure and the metal parts imbedded in rubbish 14 heaps all should carry out rotproofing.

1.5. installation sludge gas collecting device

Imbed sludge gas collecting device 10 (seeing Fig. 1, Fig. 3) in rubbish 14 fill process, include vertical effuser and annular gas collector, vertical effuser adopts the engineering materials of tube wall good permeability, as plastics french drain and flexible porous tube etc.Vertical effuser is to be socketed to form at interval by thick vertical son pipe and thin vertical son pipe, when sedimentation takes place in the rubbish 14 around being wrapped in vertical effuser, the thin vertical sub-pipe that is socketed in thick vertical son pipe two ends can freely stretch into thick vertical son pipe, eliminates the friction resistance that vertical effuser outer wall is produced because of rubbish 14 sedimentations with the vertical deformation of isodose.

The gas collection cavity of annular gas collector can be done more greatly, and it is more satisfactory to adopt intensity height and corrosion-resistant good glass-fiber reinforced plastic grille material to make, and can make square pipe for easy to process.All vertical effusers all are communicated with annular gas collector, and exhaust branch pipe 11 inserts annular gas collector and discharges biogas to exhaust-gas receiver.Air pressure can discharge naturally than the ambient pressure height when rubbish 14 produced biogas in the silo, but also can induced draft fan be installed on exhaust-gas receiver force to extract biogas in the silo as required.

Each silo exhaust branch pipe 11 all should be installed control valve, and inserts exhaust-gas receiver again behind the measuring instrument such as gas meter.

1.6. installation spray equipment

When rubbish 14 continues charging and reaches design height in silo after, spray equipment 12 (seeing Fig. 1, Fig. 2) is installed, described spray equipment 12 is meant " flute " shape shower of some duct wall perforates of uniform distribution on rubbish 14 constructional surfaces of silo top, each " flute " shape shower is communicated with last water arm 13, last water arm 13 connects the supply mains, and last supply mains connects the sump pump water outlet.In the spray process, dried quiet because of numerous shower tube wall posticums are aperture if the solid impurity in the sewage that sump pump promotes can be filtered, then go up water arm 13 and can directly connect shower.If but impurity might stop up the shower posticum in the sewage, then should increase a tank of spill-over automatically in silo top central authorities, last water arm 13 inserts in the tank, shower connects the tank bottom, in case occur stopping up as the shower posticum, then tank spill-over automatically brings obstruction can for the sump pump water outlet.

Water arm 13 all should be installed control valve, under meter etc. and insert the supply mains again on each silo.

1.7. the silo top covers sealing

Silo top cover should select airtight, sufficient intensity and the good material of ageing resistance are arranged, mainly contain two classes, a class is flexible cloth 9 materials, as tarpaulin, geotextile, plastic cloth etc.; Another kind of is duricrust cover 26 class materials, as glass reinforced plastic, metal sheet, engineering plastics etc.

Silo top coverture and silo body 8 encapsulation scheme have multiple, as follows:

Scheme one: see Fig. 4, flexible cloth 9 and the sealing petticoat 17 contact surface cementing close adhesion of extending outside the silo body 8 then adopt rope 25 to be bundled in channel-section steel 23 grooves of silo body 8 tops setting, can repeat folding binding 2～3 roads.The steel pipe 24 that is welded on channel-section steel 23 tops can make flexible cloth 9 and sealing petticoat 17 avoid relatively channel-section steel 23 flanges of " sharply ".

Scheme two: see Fig. 9, flexible cloth 9 together is wrapped on the channel-section steel flange 30 with the sealing petticoat 17 contact surface cementing close adhesion of extending outside the silo body 8, again insert rectangular filling pad 28 " interlock " flexible cloth 9 and seal petticoat 17 on channel-section steel flange 30 thereafter, rectangular filling pad 28 is along channel-section steel flange 30 elongated continuously " interlock " Bao Gu, and it is further fastening along channel-section steel flange 30 U type folder 27 to be set at interval at last.

Scheme three: the warehouse piece 18 at silo body 8 tops recessed part in silo adopts foam-plastic blocks outwards to get discard, make silo body 8 outer surface of cupular part form one " burnishing surface ", flexible cloth 9 and the sealing petticoat 17 contact surface cementing close adhesion of extending outside the silo body 8, then adopt rope 25 to be bundled on " burnishing surface ", can repeat folding binding 2～3 roads.

Scheme four: see Figure 10, duricrust cover 26 periphery sealing petticoat 17 contact surface cementing close adhesion outer with extending silo body 8 are attached on the channel-section steel flange 30, again insert rectangular filling pad 28 " interlock " duricrust cover 26 and seal petticoat 17 on channel-section steel flange 30 thereafter, rectangular filling pad 28 is along channel-section steel flange 30 elongated continuously " interlock " Bao Gu, and it is further fastening along channel-section steel flange 30 U type folder 27 to be set at interval at last.

Scheme five: see Figure 11, duricrust cover 26 peripheries and sealing petticoat 17 close adhesion then cover bar shaped pads 29 along duricrust cover 26 peripheries continuously attached on the channel-section steel flange 30, adopt bolt 21 intervals fastening at last.

More than five kinds of scheme suggested designs one and scheme two.

Exempt from and expose to the sun and rain for making Cang Ding cover flexible cloth 9, it is aging to delay flexible cloth 9, covers after sealing finishes on the silo top, adds a tarpaulin overcoat again, encases whole silo end face and silo body 8 tops about 1～2 meter scope downwards, just as wear " sunbonnet " to silo.

2. garbage anaerobic fermentation

During rubbish 14 anaerobically fermentings, in order to quicken rubbish 14 become thoroughly decomposed process, voluminous biogas, and eliminate sewage more, need often spray rubbish 14, make that rubbish 14 remains on the high humidity state as far as possible for a long time in the silo.

Because the following water arm 7 of each silo and other one draw branch sewer 7 outward by inserting supply mains down again after the valve control separately, so " opening " or " pass " by each time of control water arm 7 valves, sump pump can freely select to extract the sewage 15 in any silo, comprises the outer sewage that draws.

Because the last water arm 13 of each silo is by inserting upward supply mains again after the valve control separately, so by controlling water arm 13 valves on each " opening " or " pass ", sump pump can freely be selected the rubbish 14 spray sewage in any silo.

Because the exhaust branch pipe 11 of each silo is by inserting exhaust-gas receiver again after the valve control separately, so " open " or " pass " by each exhaust branch pipe 11 valve of control, induced draft fan can freely be selected the biogas in any silo of pressure extraction.

Rubbish 14 reaches ideal and becomes thoroughly decomposed after the degree in the silo, can stop to spray sewage, then about 3～5 days of clear water of spray is to clean the remaining soluble organic in the rubbish 14, stop to spray about 3 days of clear water again with the moisture in the refreshing stem portion rubbish 14, drain sewage 15 in the sewage lagoon 1 at last, and close the discharging that opens a position behind the door of all manifold valve of this silo.

3. discharging opens a position

Get final product discharging after removing Cang Ding covering 9,26 and spray equipment 12.

Gantry crane hangs in empty barrel in the silo, and light-duty excavator or manually feed in barrel then hangs out silo by gantry crane with barrel, and loads onto ground 16 transport trolleys.

In normally operation process of refuse tip, a silo is always arranged in discharging, another silo so just can be transferred to the charging silo at the warehouse piece 18 that the discharging silo is pulled down and install in charging after finishing.

4. remark additionally:

Though below in conjunction with the embodiments the present invention is further specified, those of ordinary skill in the art will be appreciated that: the foregoing description only is used for illustrating, can not be as limitation of the present invention.Therefore, can be out of shape embodiment in connotation scope of the present invention, these distortion comprise: as have ready conditions and adopt the warehouse piece 18 that arc surface is arranged, then its shape is not limited in rectangle, can also be trapezoidal, hexagon, cruciform etc.; For another example, the effuser of imbedding rubbish 14 heaps can also be a spirrillum etc., more than these distortion all drop within the rights protection scope of the present invention.

Claims

1. a rubbish anaerobic fermentation method is characterized in that, may further comprise the steps:

Rubbish (14) continues charging in silo, assembling warehouse piece (18) progressively rises silo body (8) in this process; And

In assembling warehouse piece (18) process, warehouse piece (18) splicing seams is sealed; And

In rubbish (14) fill process, imbed sludge gas collecting device (10); And

Adhere to sealing petticoat (17) at silo body (8) inwall; And

When rubbish (14) continues after charging reaches design height spray equipment (12) to be installed in silo; And

Silo top coverture (9,26) is fastening with silo body (8) sealing; And

Rubbish (14) sealed storage at least one one hundred day in silo is repeatedly opened sump pump spray rubbish (14) during this period; And

When rubbish in the silo (14) reaches the ideal discharging that opens a position after the degree of becoming thoroughly decomposed, remove the silo top and cover (9,26) and dismounting spray equipment (12); And

Continue to remove in the outside discharging process warehouse piece (18) at matured waste (14) silo body (8) is progressively descended, and progressively remove sludge gas collecting device (10).

2. a kind of according to claim 1 rubbish anaerobic fermentation method is characterized in that, and is further comprising the steps of: sealed strip is pasted at each adjacent warehouse piece (18) splicing seams place at silo body (8) inwall.

3. a kind of according to claim 1 rubbish anaerobic fermentation method, it is characterized in that, further comprising the steps of: the silo top adopts airtight flexible cloth (9) to cover sealing, sealing petticoat (17) close adhesion that flexible cloth (9) is outer with extending silo body (8) then adopts rope (25) to be bundled in the groove at silo body (8) top.

4. a kind of according to claim 1 rubbish anaerobic fermentation method, it is characterized in that, further comprising the steps of: the silo top adopts airtight flexible cloth (9) to cover sealing, flexible cloth (9) sealing petticoat (17) close adhesion outer with extending silo body (8) together is wrapped on silo body (8) the top flange (30), again insert rectangular filling pad (28) " interlock " flexible cloth (9) and seal petticoat (17) on flange (30) thereafter, rectangular filling pad (28) is along flange (30) elongated continuously " interlock " Bao Gu, and it is further fastening along flange (30) U type folder (27) to be set at interval at last.

5. realize device as claim 1～4 rubbish anaerobic fermentation method, it is characterized in that: silo body (8) is to be assembled by a plurality of warehouse pieces (18), warehouse piece (18) is by a skeleton frame (19) and adhere to a plate (20) and form on skeleton frame (19), adopts bolt (21) to be fastenedly connected between each adjacent warehouse piece (18); And

Each adjacent warehouse piece (18) splicing seams seals, and presss from both sides gasket in the splicing seams, is coated with sealing compound; And

The silo base is a Steel Concrete sewage lagoon (1), sewage lagoon is made up of pool wall (3) and base plate (2), one wet well (6) and water arm (7) are once arranged under the sewage lagoon base plate (2), and following water arm (7) extends outside silo and meets down the supply mains, and following supply mains connects the sump pump water-in; And

Sludge gas collecting device (10) is to be stored the gas-pervious effuser of equally distributed some tube walls in rubbish (14) heap in silo, effuser forms many channel of gas collection in being stored rubbish (14) heap, collect and conveying biogas to one exhaust branch pipe (11), exhaust branch pipe (11) extends the gas house steward of running in outside silo; And

When rubbish (14) continues charging and reaches design height in silo after, spray equipment (12) is installed, described spray equipment (12) is some duct wall perforates of uniform distribution " flute " shape shower on silo top rubbish (14) constructional surface, each " flute " shape shower is communicated with water arm (13) on, and last water arm (13) extends outside silo and connects the supply mains.

6. as a kind of garbage anaerobic fermentation device as described in the claim 5, it is characterized in that: the skeleton frame (19) of warehouse piece (18) is to be made by angle steel, and the plate (20) of warehouse piece (18) is a thickness less than 4 millimeters metal sheet.

7. as a kind of garbage anaerobic fermentation device as described in the claim 5,6, it is characterized in that: warehouse piece (18) is the straight plate of a no arc surface, vertical splicing seams between each levels warehouse piece (18) does not misplace, and promptly all vertical splicing seams are all along the vertical elongated setting of silo body (8).

8. as a kind of garbage anaerobic fermentation device as described in the claim 5, it is characterized in that: a plurality of buttresses (4) are arranged in the Steel Concrete sewage lagoon (1), buttress (4) is put on the shelf and is provided with flase floor (5), rubbish (14) is deposited on the flase floor (5) in the silo, and sewage flows into sewage lagoon (1) in the rubbish (14) through flase floor (5) space.

9. as a kind of garbage anaerobic fermentation device as described in the claim 5, it is characterized in that: spray equipment (12) also comprises the tank of spill-over voluntarily, tank is placed in and is stored rubbish (14) end face central authorities, pick out some " flute " shape showers around the tank bottom and be evenly distributed on and be stored rubbish (14) end face, in last water arm (13) the access tank.

10. as a kind of garbage anaerobic fermentation device as described in the claim 5, it is characterized in that: cover after (9,26) sealing finishes on the silo top, add a flexible cloth overcoat again, encase whole silo end face and push up downward OK range along silo body (8).