CN109987811A - A kind of pretreating process before sheep dung anaerobic fermentation - Google Patents
A kind of pretreating process before sheep dung anaerobic fermentation Download PDFInfo
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- CN109987811A CN109987811A CN201910336665.2A CN201910336665A CN109987811A CN 109987811 A CN109987811 A CN 109987811A CN 201910336665 A CN201910336665 A CN 201910336665A CN 109987811 A CN109987811 A CN 109987811A
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- Prior art keywords
- sheep dung
- sheep
- mixing tank
- anaerobic fermentation
- crusher
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
Abstract
The invention discloses the pretreating process before a kind of sheep dung anaerobic fermentation, including wetting, conveying, it is broken, it sizes mixing four steps, specific steps are as follows: after sheep dung is collected in transport to the heap manure pit of methane station, using tap water, surface water or biogas slurry are sprayed, after sheep dung sufficiently soaks, sheep dung is shoveled in material bin with forklift, sheep dung is sent into crusher by the conveyer for starting hopper lower part, granular sheep dung is crushed by crusher, sheep dung after broken is fallen in size-mixing tank from the discharge port of crusher, then tap water is added into size-mixing tank, surface water or biogas slurry, and start size-mixing tank blender, anaeroic digestor, which is squeezed into, through feed pump carries out anaerobic fermentation production biogas.The present invention can solve sheep dung and be directly entered after anaerobic reactor the problems such as floating, apparatus for feeding and pipeline present in anaerobic reactor are easy blocking, anaerobic digestion time is long, raw material factor of created gase is low.
Description
Technical field
The present invention relates to the pretreating process before sheep dung anaerobic fermentation, belong to the pretreatment of raw material in large and medium-sized biogas project
Technical field.
Background technique
Large and medium-sized biogas project is to solve one of the important means of rural energy supply, and most of such biogas project is with ox
The feces of livestock and poultry such as excrement, pig manure, sheep dung, chicken manure are raw material.Sheep dung is the solid particle of ellipsoid, and moisture content is lower, outer bread
One layer of compacted zone is wrapped up in, is easy to swim in liquid surface.Feed classification and feeding manner as used by mutton sheep farm are not
Together, it is also possible to be mixed into some long stapled forage grasses in sheep dung.When doing biogas using sheep dung, such as without pretreatment appropriate, hold
It is also easy to produce following problem:
1, sheep dung and forage grass swim in liquid surface, cause mixing difficult.When using pump for conveying, it is easy blocking conveying and sets
Standby and pipeline.It is easy the cloth system of blocking anaerobism pot bottom, and is difficult to dredge.
2, sheep dung and forage grass swim in the liquid surface in anaerobic jar, and material layering is obvious, and raw material can not be with activated sludge
It comes into full contact with, causes raw material factor of created gase low.
3, sheep dung and forage grass swim in the liquid surface in anaerobic jar, are easy the discharge pipe of blocking anaerobic jar.
The present invention solves the above problem using the technical solutions such as soak, being crushed, sizing mixing, thus have greatly application with
Promotional value.
Summary of the invention
A kind of pretreating process the purpose of the invention is to overcome above-mentioned deficiency, before providing sheep dung anaerobic fermentation.
The technical solution adopted by the present invention is that: the pretreating process before a kind of sheep dung anaerobic fermentation, mainly include wetting,
It conveys, be crushed, four steps of sizing mixing, specific steps are as follows: the sheep dung of scale mutton sheep farm is transported after collecting to the heap of methane station
It in manure pit, is sprayed using tap water, surface water or biogas slurry, the mass ratio of sheep dung and liquid is 1:1~1:2, spray
12~48 hours are stood afterwards, after sheep dung sufficiently soaks, sheep dung is shoveled in material bin with forklift, starts the spiral transferring of hopper lower part
Machine or belt conveyor are sent, sheep dung is sent into roller squash type crusher or wet stock pulverizer, granular sheep dung is crushed,
Sheep dung after broken is fallen in size-mixing tank from the discharge port of crusher or pulverizer, is then added originally into size-mixing tank
Water, surface water or biogas slurry start size-mixing tank blender, adjust the solid concentration of material in 5%~10% range, most pass through afterwards
Feed pump squeezes into anaeroic digestor and carries out anaerobic fermentation production biogas.
Preferably, for its moisture content of sheep dung collected by scale mutton sheep farm 30%~60%, sheep dung is in ellipsoid.
Preferably, the heap manure pit is that semi-underground type brick is mixed or reinforced concrete structure, bottom of pond are lower than 0.2~1m of ground, Chi Ding
Be above the ground level 0.2~1m, pond heading tape steel structure canopy.
Preferably, the sheep dung pours into heap manure pit through haulage vehicle, then to sheep dung heap top spray tap water, surface water
Or biogas slurry, the mass ratio of sheep dung and liquid are 1:1, stand 24 hours after spray, to guarantee that sheep dung sufficiently absorbs water, expands.
Preferably, when containing long stapled material in sheep dung, using wet stock pulverizer；When there is no long fibre in sheep dung
Material when, using to roller squash type crusher.Wherein, wet stock pulverizer is that profession crushes high humility, multifilament substance
Professional disintegrating apparatus is chiefly used in organic fertilizer production processing link, for crushing half wet stock such as cow dung, sheep dung, chicken manure.Material by
Pulverizer top enters in the pulverizing chamber of pulverizer, the cutting of high-speed revolving blade in pulverizing chamber, by bulky grain, long stapled
Then materials crusher is fallen directly into size-mixing tank at tiny particle through pulverizer discharge port.Wet stock pulverizer is not set
It counts sieve and sieves bottom, will not be blocked because wet feed crushes, cause to burn out motor, influence to produce.Double-roll crusher is to utilize the slow-speed of revolution
The working principle that high pressure squeezes roller, sheep dung are vertically fallen into crusher chamber by crusher upper, and what is generated between two rollers is strong
Under big pressure extrusion is broken, sheep dung largely becomes powdery, and fraction becomes sheet, then falls into and size mixing through discharge hole of crusher
In pond, become powdery under the further shearing of the blender of size-mixing tank blender.
Preferably, the material falls into size-mixing tank, using tap water, surface water or biogas slurry as diluent, after dilution
Material solid concentration in 5%~6% range.
Beneficial effects of the present invention are as follows:
1, it is easy to be stifled can to solve floating, apparatus for feeding and pipeline present in the direct anaerobic fermentation process of sheep dung by the present invention
Plug, the problems such as digestion time is long, factor of created gase is low.
2, process flow of the present invention is simple, equipment is few, raw material availability is high.
3, equipment of the present invention is matured product, is easy to practical application.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Fig. 1 is process flow diagram of the invention.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1
Certain scale mutton sheep farm, produces sheep dung 20000kg daily, its moisture content of sheep dung is in 40%, heap density
500kg/m3, without sundries such as long stapled forage grasses in sheep dung, transported using haulage vehicle to methane station and poured into heap manure pit.
For the continuity for guaranteeing production, heap manure pit is arranged two, and every heap manure pit accommodates one day sheep dung, then heap manure pit
Dischargeable capacity is V1=20000kg ÷ 500kg/m3=40m3If the packing factor of heap manure pit is 80%, then the full appearance of heap manure pit
Product is V2=40m3÷ 80%=50m3, take heap manure pit overall height H1=1m, then the area S of heap manure pit1=50m3÷ 1m=50m2,
Take the length L of heap manure pit1=10m, then width W1=5m, then the size of single seat heap manure pit is L1×W1×H1=10m × 5m × 1m；
Two heap manure pits are built jointly together, intermediate to be separated with partition wall, then the overall dimension of heap manure pit be L × W × H=10m × 10m ×
1m。
It is that 1:1 sprays into biogas slurry into sheep dung heap according to the mass ratio of sheep dung and liquid, then needs the quality of biogas slurry to be
20000kg；After spraying biogas slurry, 24 hours are stood, sheep dung is allowed sufficiently to soak, expand；
After time of repose meets, sheep dung is shoveled into material bin with forklift, hopper is up big and down small inverted cone-shaped structure；Under hopper
Portion is belt conveyor, and sheep dung is sent into the feed inlet of crusher through belt conveyor.
Broken time t=4~8h is selected, broken material total amount is 40000kg daily, then crusher is hourly broken
Ability is 5000~10000kg/h, due to being free of the sundries such as long stapled forage grass in the sheep dung, selects the model of 2PG610 × 400
To roller squash type crusher, the breaking capacity of the crusher is 5000~20000kg/h, 2 × 15kw of electrode power, outer
Shape is having a size of 3510 × 1420 × 1030mm.
Sheep dung after broken is fallen in size-mixing tank from the discharge port of crusher or pulverizer, is added in size-mixing tank
Biogas slurry adjusts the solid concentration of material 5%, then the biogas slurry mass M for needing to be addedBiogas slurry=20000kg × (1-40%)/5%-
40000kg=200000kg；The gross mass of material is M in size-mixing tankAlways=20000kg × (1-40%)/5%=240000kg,
If the specific gravity of material is 1000kg/m3, then the dischargeable capacity V of size-mixing tankIt sizes mixing=240000kg ÷ 1000kg/m3=240m3If adjusting
It is 80% that the filling of stock tank, which is washed one's face and rinsed one's mouth, then the total volume V of size-mixing tank it is complete=240m3÷ 80%=300m3, take size-mixing tank for cylinder,
Height is 6m, then sectional area is 50m2, then diameter selects 8m.
Embodiment 2
Certain scale mutton sheep farm, produces sheep dung 12000kg daily, its moisture content of sheep dung is in 50%, heap density
600kg/m3, containing sundries such as long stapled forage grasses in sheep dung, transported using haulage vehicle to methane station and poured into heap manure pit.
For the continuity for guaranteeing production, heap manure pit is arranged two, and every heap manure pit accommodates one day sheep dung, then heap manure pit
Dischargeable capacity is V1=12000kg ÷ 600kg/m3=20m3If the packing factor of heap manure pit is 80%, then the full appearance of heap manure pit
Product is V2=20m3÷ 80%=25m3, take heap manure pit overall height H1=1m, then the area S of heap manure pit1=25m3÷ 1m=25m2,
Take the length L of heap manure pit1=5m, then width W1=5m, then the size of single seat heap manure pit is L1×W1×H1=5m × 5m × 1m；Two
Seat heap manure pit is built jointly together, intermediate to be separated with partition wall, then the overall dimension of heap manure pit is L × W × H=10m × 5m × 1m.
It is that 1:1 sprays into biogas slurry into sheep dung heap according to the mass ratio of sheep dung and liquid, then needs the quality of biogas slurry to be
12000kg；After spraying biogas slurry, 24 hours are stood, sheep dung is allowed sufficiently to soak, expand；
After time of repose meets, sheep dung is shoveled into material bin with forklift, hopper is up big and down small inverted cone-shaped structure；Under hopper
Portion is screw conveyor, and sheep dung is sent into the feed inlet of pulverizer through screw conveyor.
Grinding time t=6h is selected, the material total amount of crushing is 24000kg, then pulverizer breaking capacity hourly is
4000kg/h, due to, containing sundries such as long stapled forage grasses, selecting the wet stock pulverizer of 60 model of BSFS-in the sheep dung,
The grindability of the pulverizer is 4000kg/h, power of motor 30kw.
Sheep dung after crushing is fallen in size-mixing tank from the discharge port of pulverizer, and biogas slurry is added in size-mixing tank and adjusts
The solid concentration of material is 6%, then the biogas slurry mass M that needs to be addedBiogas slurry=12000kg × (1-50%)/6%-24000kg=
76000kg；The gross mass of material is M in size-mixing tankAlways=12000kg × (1-50%)/6%=100000kg, if the ratio of material
Weight is 1000kg/m3, then the dischargeable capacity V of size-mixing tankIt sizes mixing=100000kg ÷ 1000kg/m3=100m3If the filling of size-mixing tank
Coefficient is 80%, then the total volume V of size-mixing tank it is complete=100m3÷ 80%=125m3, it takes size-mixing tank for cylinder, is highly 5m,
Then sectional area is 25m2, then diameter selects 2.9m.
The basic principles, main features and advantages of the invention have been shown and described above.Those skilled in the art
It should be appreciated that the protection scope that the above embodiments do not limit the invention in any form, all to be obtained using modes such as equivalent replacements
The technical solution obtained, falls in protection scope of the present invention.Part that the present invention does not relate to is the same as those in the prior art or can adopt
It is realized with the prior art.
Claims (8)
1. the pretreating process before a kind of sheep dung anaerobic fermentation, it is characterised in that including wetting, convey, be crushed, sizing mixing four walks
Suddenly, specific steps are as follows: after the sheep dung of scale mutton sheep farm is collected in transport to the heap manure pit of methane station, using tap water,
Table water or biogas slurry are sprayed, and the mass ratio of sheep dung and liquid is 1:1~1:2,12~48 hours are stood after spray, to sheep
After excrement sufficiently soaks, sheep dung is shoveled in material bin with forklift, the screw conveyor or belt conveyor of hopper lower part are started, by sheep
Excrement is sent into roller squash type crusher or wet stock pulverizer, and granular sheep dung is crushed, and the sheep dung after broken is from broken
The discharge port of broken machine or pulverizer is fallen in size-mixing tank, and tap water, surface water or biogas slurry are then added into size-mixing tank, opens
Dynamic size-mixing tank blender, adjusts the solid concentration of material in 5%~10% range, most squeezes into anaeroic digestor through feed pump afterwards
It carries out anaerobic fermentation and produces biogas.
2. the pretreating process before a kind of sheep dung anaerobic fermentation according to claim 1, which is characterized in that scale mutton sheep is supported
Its moisture content of sheep dung collected by field is grown 30%~60%, and sheep dung is in ellipsoid.
3. the pretreating process before a kind of sheep dung anaerobic fermentation according to claim 1, which is characterized in that the heap manure pit
For semi-underground type brick is mixed or reinforced concrete structure, bottom of pond is lower than 0.2~1m of ground, and Chi Ding is above the ground level 0.2~1m, pond heading tape steel knot
Structure awning.
4. the pretreating process before a kind of sheep dung anaerobic fermentation according to claim 1, which is characterized in that the sheep dung warp
Haulage vehicle pours into heap manure pit, then to sheep dung heap top spray tap water, surface water or biogas slurry, the quality of sheep dung and liquid
Ratio is 1:1, stands 24 hours after spray, to guarantee that sheep dung sufficiently absorbs water, expands.
5. the pretreating process before a kind of sheep dung anaerobic fermentation according to claim 1 or 2, which is characterized in that work as sheep dung
In contain long stapled material when, using wet stock pulverizer；When there is no long stapled material in sheep dung, squeezed using to roller
Formula crusher.
6. the pretreating process before a kind of sheep dung anaerobic fermentation according to claim 5, which is characterized in that the wet object
Expect that pulverizer is used for organic fertilizer production processing link, material is entered in the pulverizing chamber of pulverizer by pulverizer top, through pulverizing chamber
Then the cutting of interior high-speed revolving blade discharges by bulky grain, long stapled materials crusher at tiny particle through pulverizer
Mouth is fallen directly into size-mixing tank.
7. the pretreating process before a kind of sheep dung anaerobic fermentation according to claim 5, which is characterized in that described to roller
Crusher using slow-speed of revolution high pressure to roller fashion of extrusion, sheep dung is vertically fallen into crusher chamber by crusher upper, two rollers it
Between under the crunch attrition crushing that generates, sheep dung largely becomes powdery, and fraction becomes sheet, then discharges through crusher
Mouth is fallen into size-mixing tank, becomes powdery under the further shearing of the blender of size-mixing tank blender.
8. the pretreating process before a kind of sheep dung anaerobic fermentation according to claim 1, which is characterized in that the material is fallen
Enter size-mixing tank, using tap water, surface water or biogas slurry as diluent, the solid concentration of the material after dilution is 5%~6%
In range.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910336665.2A CN109987811A (en) | 2019-04-25 | 2019-04-25 | A kind of pretreating process before sheep dung anaerobic fermentation |
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| CN201910336665.2A CN109987811A (en) | 2019-04-25 | 2019-04-25 | A kind of pretreating process before sheep dung anaerobic fermentation |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5185258A (en) * | 1975-01-22 | 1976-07-26 | Hitachi Ltd | |
| CN102225833A (en) * | 2011-04-07 | 2011-10-26 | 北京联合创业环保工程有限公司 | Pretreatment system and method for raw anaerobic fermentation material |
| CN104710091A (en) * | 2015-04-03 | 2015-06-17 | 周玲娣 | Pretreatment method before milk cow manure anaerobic fermentation |
-
2019
- 2019-04-25 CN CN201910336665.2A patent/CN109987811A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5185258A (en) * | 1975-01-22 | 1976-07-26 | Hitachi Ltd | |
| CN102225833A (en) * | 2011-04-07 | 2011-10-26 | 北京联合创业环保工程有限公司 | Pretreatment system and method for raw anaerobic fermentation material |
| CN104710091A (en) * | 2015-04-03 | 2015-06-17 | 周玲娣 | Pretreatment method before milk cow manure anaerobic fermentation |
Non-Patent Citations (2)
| Title |
|---|
| 杨文宪: "《沼气利用新技术》", 30 June 2006, 山西人民出版社 * |
| 胡华锋等: "《农业固体废物处理与处置技术》", 30 April 2009, 中国农业大学出版社 * |
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Application publication date: 20190709 |