CN102276319B - Method for removing impurities from anaerobic fermentation raw materials in livestock and poultry excrement recycling process - Google Patents
Method for removing impurities from anaerobic fermentation raw materials in livestock and poultry excrement recycling process Download PDFInfo
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- CN102276319B CN102276319B CN2011101515656A CN201110151565A CN102276319B CN 102276319 B CN102276319 B CN 102276319B CN 2011101515656 A CN2011101515656 A CN 2011101515656A CN 201110151565 A CN201110151565 A CN 201110151565A CN 102276319 B CN102276319 B CN 102276319B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention relates to a method for removing impurities from anaerobic fermentation raw materials in a livestock and poultry excrement recycling process, which comprises the steps of: regulating livestock and poultry excrements in a mixing pool to reach a specified fermenting concentration; stirring fermenting raw materials uniformly, settling inorganic impurities with large density in the bottom of the mixing pool in a stirring process; after finishing feeding, scraping the inorganic impurities into the sand collecting hopper by a sand scarping machine, conveying scrapped inorganic impurities to a drying bed; feeding uniformly-mixed feed liquid into a vibrating screen through for screening, discharging the impurities which are easy to cause pipeline blockage and form scummings in a fermenting pool on a fixed screen; feeding the feed liquid screened by the vibrating screen and the sewage filtered by the fixed screen into a feeding pool, feeding into the fermenting pool through a feeding pump; and arranging a cyclone sand remover on a pipeline through which the feed liquid and the sewage enter the fermenting pool, and further removing the inorganic impurities in the feed liquid. According to the invention, the problems of abrasion and blockage of equipment and the pipeline, caused by the impurities in the livestock and poultry excrements, difficulty in bottom deslagging after the feed liquid enters the fermenting pool, and easiness in forming scummings at the top are solved, and operation management level and recycling efficiency of the livestock and poultry excrement recycling treatment project are improved.
Description
Technical field
The invention belongs to the resource and environment technical field, be specifically related to a kind of livestock and poultry feces recycling treatment engineering anaerobic fermentation raw material impurity-removing method.
Background technology
China is world population the first big country, also is aquaculture the first big country.The state-owned large-scale cultivation field pig that surpasses more than 10,000 is delivered for sale more than 3000 at present, laying hen livestock on hand 50,000 plumages are above, broiler chicken delivers that 100,000 plumages are above for sale, milk cow livestock on hand more than 200, beef cattle are delivered for sale more than 500.Ight soil and sewage that plant's discharging is a large amount of as without effective processing, will cause great harm to environment.Because the organic content of feces of farm is high, not only infrastructure investment is large but also running cost is high by aerobic treatment, can't promote down.And by anaerobic treatment, both can remove a large amount of organism, can also kill various viruses in the excrement dirt etc.The biogas that produces in the anaerobic fermentation process is high-quality new forms of energy, and it both can be used for by central gas supply resident's daily cooking, can also carry out marsh gas power generation, and the natural pond liquid behind the excrement soiled ends anaerobically fermenting and natural pond slag are good fertilizers.Therefore, anaerobically fermenting processing livestock and poultry feces is a kind of economy, environmental protection, ecology and feasible implementation method.
In recent years, along with the attention to environmental problem, for the dirty problem of the excrement of large-scale cultivation field, thousands of livestock and poultry feces recycling treatment engineering that China is newly-built.Yet, contain the inorganic impurity such as a large amount of sand and pig hair, chicken feather, straw etc. easily form scum silica frost in fermentation vat impurity in the livestock and poultry feces, brought series of problems to Engineering Operation:
A large amount of inorganic impurities that 1 livestock and poultry feces contains, easily wearing and tearing fresh feed pump and feed pipe when charging enter behind the fermentation vat easily the equipment such as wearing and tearing stirrer.Simultaneously, the poor fluidity of inorganic impurity is difficult to behind the long-play discharge and is accumulated at the bottom of the fermentation vat, reduces the effective volume of fermentation vat, reduces fermentation efficiency.
Contain the impurity such as pig hair, chicken feather, straw in 2 livestock and poultry feces, when adopting common submersible sewage pump charging, these impurity stop up fresh feed pump and feed pipe easily.Existing livestock and poultry feces recycling treatment engineering all enters into fermentation vat by spiral pump after mostly adopting the cutting machine chopping, and equipment is complicated, and cost is higher.
The impurity such as 3 pig hairs, chicken feather, straw are because scum silica frost is formed on the little fermentation vat top that swims in easily of density, and obstruction biogas overflows and causes fermentation vat pressure excessive, even sets off an explosion.Simultaneously, scum silica frost is difficult to clear from fermentation vat.
The anaerobic fermentation raw material removal of impurities can fundamentally address these problems, but does not also have at present a kind of system, comprehensively remove the method for the impurity in the livestock and poultry feces recycling treatment engineering anaerobic fermentation raw material.
Summary of the invention
The objective of the invention is according to the demand of livestock and poultry feces recycling treatment and the characteristics of fermentation raw material, a kind of solution equipment attrition, line clogging are proposed, and the easy livestock and poultry feces recycling treatment engineering anaerobic fermentation raw material impurity-removing method of the problem such as formation scum silica frost in fermentation vat deslagging difficulty and the fermentation vat.
A kind of livestock and poultry feces recycling treatment engineering anaerobic fermentation raw material impurity-removing method that the present invention proposes, concrete steps are as follows:
1. fermentation raw material 1 enters into batch mixing pond 2, and according to production engineering specifications, the natural pond liquid of 0 ~ 3 times of backflow raw material volume is in batch mixing pond 2 from natural pond liquid storage pool 17;
2. utilize the stirrer 3 in the batch mixing pond 2 that fermentation raw material 1 and the natural pond liquid of step in is 1. mixed, mixing time is 0.25 ~ 1h;
3. the large inorganic impurity 4 of density sinks to the bottom in batch mixing pond 2 in the step feed liquid 2. in whipping process, scrapes the sand collecting hopper 5 of 2 bottoms, batch mixing pond by sand scraper 6, is transported to drying bed 8 by worm conveyor 7;
4. the feed liquid of step in 2. enters vibratory screening apparatus 10 by underflow pump 9 and sieves, and with impurity 11 screenings that easily form scum silica frost in fermentation vat out, and is discharged in the stationary screen 12, further leaches moisture;
5. the sewage that leaches through feed liquid and the stationary screen 12 of vibratory screening apparatus 10 screening in 4. of step enters feed tank 13, then enters fermentation vat 16 by fresh feed pump 14.
6. step in 5. fresh feed pump 14 and the pipeline before the fermentation vat hydrocyclone 15 is set, further remove the inorganic impurity 4 in the feed liquid.
Beneficial effect of the present invention:
When 1 anaerobic fermentation raw material concentration is high, utilize natural pond liquid batch mixing to regulate material concentration, can reduce the quantity discharged of natural pond liquid, alleviate the pressure that follow-up natural pond liquid utilizes.
The inorganic impurity that density is large in 2 fermentation raw materials adopts mechanical stirring in the batch mixing pond, precipitate in a large number owing to the difference of density.Tiny inorganic impurity adopts hydrocyclone further to remove before entering fermentation vat in the feed liquid.Secondary impurity-removing method equipment of the present invention is simple, easy handling, dust removal rate are high, can remove the inorganic impurity more than 90%, has reduced the e-quipment and pipe wearing and tearing.
3 vibratory screening apparatuss can sieve out with the impurity such as the pig hair more than 80%, chicken feather, straw in the fermentation raw material.Feed liquid after the screening can adopt common submersible sewage pump charging, not only avoided fresh feed pump and feed pipe to stop up, and equipment is simple, cost is low, and operational management is convenient.
The inorganic impurity that density is large in 4 fermentation raw materials enters fermentation vat, easily is accumulated at the bottom of the fermentation vat, is difficult to discharge; The impurity such as pig hair, chicken feather, straw easily form scum silica frost at the fermentation vat top, obstruction biogas overflows and causes fermentation vat pressure excessive, even sets off an explosion.The impurity-removing method that the present invention adopts can effectively be removed above-mentioned impurity, has stopped above problem.
Description of drawings
Fig. 1 is livestock and poultry feces recycling treatment engineering anaerobic fermentation raw material impurity-removing method process flow sheet.
Number in the figure: 1 is fermentation raw material, and 2 is the batch mixing pond, and 3 is stirrer, 4 is inorganic impurity, and 5 is sand collecting hopper, and 6 is sand scraper, 7 is worm conveyor, and 8 is drying bed, and 9 is underflow pump, 10 is vibratory screening apparatus, and 11 is the impurity that easily forms scum silica frost in fermentation vat, and 12 is stationary screen, 13 is feed tank, and 14 is fresh feed pump, and 15 is hydrocyclone, 16 is fermentation vat, and 17 is natural pond liquid storage pool.
Embodiment
The below illustrates the present invention as an example of a mass-producing breeding layer chicken field chicken manure recycling treatment engineering example.
Embodiment 1
The concrete technology flow process of present method is: fermentation raw material 1 enters into batch mixing pond 2, and according to production engineering specifications, the natural pond liquid of 0 ~ 3 times of backflow raw material volume is in batch mixing pond 2 from natural pond liquid storage pool 17; Then utilize the stirrer 3 in the batch mixing pond 2 that fermentation raw material and natural pond liquid are mixed, mixing time is 0.25 ~ 1h; The inorganic impurity 4 that density is large sinks in whipping process at the bottom of the pond, and inorganic impurity 4 scrapes sand collecting hopper 5 at the bottom of 2 ponds, batch mixing pond by sand scraper 6, is transported to drying bed 8 by worm conveyor 7; Feed liquid is all extracted out from batch mixing pond 2, and the feed liquid that mixes enters vibratory screening apparatus 10 by underflow pump 9.Vibratory screening apparatus 10 will easily form scum silica frost in fermentation vat impurity 11 sieves out, and is discharged in the stationary screen 12, further leaches moisture; The sewage that the feed liquid of vibratory screening apparatus 10 screenings and stationary screen 12 leach enters feed tank 13, then enters fermentation vat 16 by fresh feed pump 14.Pipeline before entering fermentation vat arranges hydrocyclone 15, further removes the inorganic impurity 4 in the feed liquid.
Aforesaid method is used for being positioned at certain Greater plant, and the cultivation scale is 100,000 plumage laying hens.For solving the chicken manure problem, have comprehensive chicken manure recycling treatment engineering, concrete steps are as follows:
1, the chicken manure that produces every day is that solids content is about 25% about 10t, by tape transport in the batch mixing pond 2 of 30m3.When carrying the natural pond liquid in the natural pond liquid storage pool 17 is discharged in the batch mixing pond 2, it is 10% that the natural pond liquid of backflow 15m3 is regulated material concentration.
2, the stirrer 3 in the batch mixing pond 2 fully mixes natural pond liquid and chicken manure, and mixing time is 0.5h.In mixing process, the inorganic impurities 4 such as the sand in the chicken manure, shell sink to greatly at the bottom of 2 ponds, batch mixing pond owing to density.
3, after the feed liquid for the treatment of batch mixing pond 2 was all extracted out, the inorganic impurity 4 of sand scraper 6 at the bottom of with 2 ponds, batch mixing pond scraped in the sand collecting hopper 5, and worm conveyor 7 is discharged to the inorganic impurities such as sand the drying bed 8 at the bottom of 2 ponds, batch mixing pond.
4, the feed liquid that mixes is sent in the high frequency shale shaker 10 that is the scarp by the underflow pump 9 with cutting unit, and the impurity such as chicken feather are sized out, then is discharged in the stationary screen 12, further removes moisture.
5, feed liquid and the sewage of screening enter into feed tank 13 together, and fresh feed pump 14 is equipped with in feed tank 13 bottoms.
6, fresh feed pump 14 is pumped into feed liquid in the fermentation vat 16, and the pipeline before entering fermentation vat 16 is equipped with hydrocyclone 15, carries out the secondary desanding.
7, through after the top a series of operation, sand in the fermentation raw material more than 90%, shell and the impurity such as chicken feather more than 90% are removed in the different stages respectively, the equipment attrition that effective solution sand and shell bring, the line clogging that chicken feather brings, and the scum problem in fermentation vat deslagging difficulty and the fermentation vat, for solid basis has been established in steady running and the maintenance management of biogas engineering.
Claims (1)
1. livestock and poultry feces recycling treatment engineering anaerobic fermentation raw material impurity-removing method is characterized in that concrete steps are as follows:
1. fermentation raw material (1) enters into batch mixing pond (2), and according to production engineering specifications, the natural pond liquid of 0 ~ 3 times of backflow raw material volume is in batch mixing pond (2) from natural pond liquid storage pool (17);
2. utilize the stirrer (3) in the batch mixing pond (2) that fermentation raw material (1) and the natural pond liquid of step in is 1. mixed, mixing time is 0.25 ~ 1h;
3. the inorganic impurity (4) that density is large in the step feed liquid 2. sinks to the bottom of batch mixing pond (2) in whipping process, scrape the sand collecting hopper (5) of batch mixing pond (2) bottom by sand scraper (6), be transported to drying bed (8) by worm conveyor (7);
4. the feed liquid of step in 2. enters vibratory screening apparatus (10) by underflow pump (9) and sieves, and with impurity (11) screening that easily forms scum silica frost in fermentation vat out, and is discharged in the stationary screen (12), further leaches moisture;
5. the sewage that leaches through feed liquid and the stationary screen (12) of vibratory screening apparatus (10) screening in 4. of step enters feed tank (13), then enters fermentation vat (16) by fresh feed pump (14);
6. step in 5. fresh feed pump (14) and the pipeline before the fermentation vat hydrocyclone (15) is set, further remove the inorganic impurity (4) in the feed liquid.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101515656A CN102276319B (en) | 2011-06-08 | 2011-06-08 | Method for removing impurities from anaerobic fermentation raw materials in livestock and poultry excrement recycling process |
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| CN2011101515656A CN102276319B (en) | 2011-06-08 | 2011-06-08 | Method for removing impurities from anaerobic fermentation raw materials in livestock and poultry excrement recycling process |
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| CN102276319A CN102276319A (en) | 2011-12-14 |
| CN102276319B true CN102276319B (en) | 2013-03-13 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104692839A (en) * | 2015-03-08 | 2015-06-10 | 湘村高科农业股份有限公司 | Organic fertilizer processing device taking pig manure as raw material |
| CN107082528B (en) * | 2017-04-19 | 2020-10-20 | 长江大学 | Advanced treatment process for livestock and poultry breeding wastewater |
| CN107381805A (en) * | 2017-08-22 | 2017-11-24 | 贵阳台农种养殖有限公司 | One kind cultivation excrement dirt reutilization system |
| CN113968663A (en) * | 2020-07-22 | 2022-01-25 | 北京时代桃源环境科技股份有限公司 | Efficient pretreatment device and method for preparing biogas through cow dung anaerobic fermentation |
| CN114058473A (en) * | 2021-11-12 | 2022-02-18 | 江西普瑞丰生态科技有限公司 | Multifunctional efficient livestock and poultry manure treatment device and use method thereof |
| CN114315027B (en) * | 2021-12-28 | 2023-01-06 | 生态环境部华南环境科学研究所 | Harmless treatment method for natural storage of liquid manure and natural storage pool thereof |
| CN116871163B (en) * | 2023-09-07 | 2023-11-28 | 吉林省农业机械研究院 | Impurity-removing feeding device for dry-cleaning feces of biogas engineering |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1222498A (en) * | 1997-10-07 | 1999-07-14 | 东洋清净化学股份有限公司 | Method and device for treatment of discharge liquid containing organics |
| CN1278516A (en) * | 2000-08-10 | 2001-01-03 | 何宝财 | Artesian sewage treating process |
| CN201154942Y (en) * | 2008-01-11 | 2008-11-26 | 宝林 | Full automatic anaerobic digestion preprocess integrated device for organic wastes |
| CN101371679A (en) * | 2008-10-13 | 2009-02-25 | 沈阳师范大学 | Method for producing feed raw material and biological organic fertilizer by comprehensive utilization of chicken droppings |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1222498A (en) * | 1997-10-07 | 1999-07-14 | 东洋清净化学股份有限公司 | Method and device for treatment of discharge liquid containing organics |
| CN1278516A (en) * | 2000-08-10 | 2001-01-03 | 何宝财 | Artesian sewage treating process |
| CN201154942Y (en) * | 2008-01-11 | 2008-11-26 | 宝林 | Full automatic anaerobic digestion preprocess integrated device for organic wastes |
| CN101371679A (en) * | 2008-10-13 | 2009-02-25 | 沈阳师范大学 | Method for producing feed raw material and biological organic fertilizer by comprehensive utilization of chicken droppings |
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