CN100402632C - Cattle manure cracking gas-producing process - Google Patents
Cattle manure cracking gas-producing process Download PDFInfo
- Publication number
- CN100402632C CN100402632C CNB2005100954487A CN200510095448A CN100402632C CN 100402632 C CN100402632 C CN 100402632C CN B2005100954487 A CNB2005100954487 A CN B2005100954487A CN 200510095448 A CN200510095448 A CN 200510095448A CN 100402632 C CN100402632 C CN 100402632C
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- China
- Prior art keywords
- gas
- cow dung
- cow
- cracking
- technology
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000005336 cracking Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 14
- 210000003608 fece Anatomy 0.000 title claims description 50
- 241000283690 Bos taurus Species 0.000 title claims description 49
- 239000010871 livestock manure Substances 0.000 title claims description 6
- 238000005516 engineering process Methods 0.000 claims abstract description 14
- 241000209094 Oryza Species 0.000 claims abstract description 11
- 235000007164 Oryza sativa Nutrition 0.000 claims abstract description 11
- 235000009566 rice Nutrition 0.000 claims abstract description 11
- 239000010902 straw Substances 0.000 claims abstract description 9
- 239000012535 impurity Substances 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 239000000428 dust Substances 0.000 claims abstract description 3
- 239000007789 gas Substances 0.000 claims description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 8
- 239000010903 husk Substances 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- 239000002023 wood Substances 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 239000007921 spray Substances 0.000 claims description 2
- 235000015099 wheat brans Nutrition 0.000 claims description 2
- 239000002699 waste material Substances 0.000 abstract description 6
- 239000007787 solid Substances 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 abstract 1
- 230000007613 environmental effect Effects 0.000 abstract 1
- 239000000446 fuel Substances 0.000 description 4
- 239000000470 constituent Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000003895 organic fertilizer Substances 0.000 description 3
- 230000013872 defecation Effects 0.000 description 2
- 239000003337 fertilizer Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 210000002700 urine Anatomy 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 208000006558 Dental Calculus Diseases 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical group N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- YYRMJZQKEFZXMX-UHFFFAOYSA-L calcium bis(dihydrogenphosphate) Chemical compound [Ca+2].OP(O)([O-])=O.OP(O)([O-])=O YYRMJZQKEFZXMX-UHFFFAOYSA-L 0.000 description 1
- 229910000389 calcium phosphate Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002361 compost Substances 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 235000019634 flavors Nutrition 0.000 description 1
- 235000012631 food intake Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 235000019691 monocalcium phosphate Nutrition 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Treatment Of Sludge (AREA)
- Processing Of Solid Wastes (AREA)
- Fertilizers (AREA)
Abstract
The present invention relates to a technology for producing gas by cracking cow dropping. The method comprises the following steps: step 1, cow dropping is dewatered and dried; step 2, the cow dropping which is dewatered and dried is mixed with straw and rice hulls according to the following weight ratio: 60 to 80% of cow dropping, 10 to 20% of straw and 10 to 20% of rice hull; step 3, an obtained mixture is conveyed into a cracking furnace to be cracked; step 4, generated combustible gas is cooled; step 5, dust and impurities in the cooled gas are removed; step 6, tar is removed, and required gas is prepared. The present invention is used for processing cow dropping. The cow dropping can be effectively processed, and energy sources are fully utilized. After the cow dropping is processed by the technology of the present invention, each ton of dry cow dropping can generate 1000M<3> of combustible gas, waste is little and is solid, the volume is small, and the present invention is an environmental protection processing technology The generated combustible gas can be directly combusted and can also be used for generating electricity.
Description
Technical field
The present invention relates to a kind of utilization of cow dung and the preparation technology of inflammable gas, specifying is a kind of cattle manure cracking gas-producing process.
Background technology
The recycling of cow dung mainly contains following several mode both at home and abroad at present.
1, compost
Cow dung is a kind of resource of preciousness as a kind of animality organic fertilizer.The ox food consumption is big, the excrement of discharging every day, urine also many than other domestic animals.An adult ox, whenever defecation amount round the clock reach 42.9kg (amplitude is 28.4～48.1kg), whenever round the clock voided volume be 10.2kg (amplitude is 6.5～14.1kg), adds pad grass, but the about 20t of production in every year high-quality organic fertilizer.It is ammonium sulfate 261kg that a head of cattle year defecation amount is amounted to chemical fertilizer quantity, calcium superphosphate 78.2kg, vitriolate of tartar 86.88kg.Farm crop are used the effect that cow dung urine also has the structure of improving the soil and preserves moisture, improve agroecological environment.If be processed into biological organic fertilizer, its economic benefit will be to sell 18 times of cow dung.
Weak point is the densification of cow dung quality, and composition is similar to pig manure, water content height (about 50%) in the cow dung, and air permeability is poor, decomposes slowly, and leavening temperature is low, and fertilizer efficiency is slow, claims that cow dung is " cold manure " so practise.
2, act as a fuel
The many areas of China are some pastoral areas especially, and most of local herdsman are still following ancient Energy utilization patterns---burn cow dung.Cow dung is taken as a kind of fuel, is used as life fuel, warms oneself, cooks.
The subject matter that cow dung is used as the fuel combustion existence is to produce a large amount of obnoxious flavoures, contaminate environment, and capacity usage ratio is low, and the biomass energy waste is serious.
3, producing methane
The calorific value of cow dung is up to 3907J/m
3, the therefore existing practice that cow dung oven dry back is produced biogas by fermentation.The mode of utilizing of this cow dung not only can not brought harm to environment, and waste material is fully used, and is a kind of environment-friendly type treatment process.But this facture exists energy utilization rate low, and the waste quantity of generation is big, also need carry out the problem of secondary treatment.
Summary of the invention
The present invention will solve is exactly that the energy utilization rate that present cow dung does not obtain fully effectively utilizing and existing cow dung gas-made technology exists is low, and the waste quantity of generation is big, also need carry out the problem of secondary treatment.
The present invention adopts following technical scheme to utilize cow dung to produce inflammable gas:
1, cow dung is dehydrated to water content be 11～18%;
2, the cow dung after will dehydrating is mixed by following weight ratio with straw, rice husk:
Cow dung: 60～80%, straw: 10～20%, rice husk: 10～20%
3, mixture being sent into the pyrolyzer cracking, is 650～850 ℃ in temperature, and oxygen content is 3～8%, and cracking zone pressure is cracking under 0.05～0.15 atmospheric condition;
4, the inflammable gas that cracking is produced cools off;
5, cooled gas is carried out dedusting, remove impurity;
6, remove tar, promptly make desired gas.
The dehydrating of step 1 cow dung can be adopted the drying of high speed drier, drying machine drying or be dried in three kinds of modes any one naturally, use also capable of being combined.
What step 3 adopted is the downdraft pyrolyzer.
The type of cooling in the step 4 both can be that air cooling also can be a water-cooled.The temperature of inflammable gas should be reduced to below 200 ℃ after step 4 cooling.
Step 5 can adopt any one in cyclone dust removal method or the spray method, but also both are used in combination.By removing the impurity particle more than the particle diameter 15 μ m in the inflammable gas in the step 5.
Step 6 can use wood sawdust or other filter materials such as rice bran, wheat bran etc. that inflammable gas is carried out dedusting.Should remove the tar more than 90% in the inflammable gas by step 6.
The present invention is used to handle cow dung, not only cow dung effectively can be handled, and the energy is fully used, and cow dung can produce 1200～1800M through dried cow dung per ton after the art breading of the present invention
3Inflammable gas, waste is few, and is solids, and volume is little, is a kind of environment-friendly type treatment process.The inflammable gas that produces can directly burn, and also can be used for generating.
After testing, adopt the composition of the inflammable gas that prepared of the present invention comes out as follows:
O
2：2～6％
H
2：10～18％
N
2：50～65％
CO：12～20％
CH
4：1～3％
CO
2：13～17％
(2) calorific value
Superior calorific value: 3.2～4.7KJ/M
3
Lower heat value: 2.6～4.3KJ/M
3
(3) gas incidence
1KG does cow dung can produce 1.2～1.8M
3Gas
Embodiment:
Embodiment 1:
(1) technological process
After cow dung was dried naturally through 10～15 days, water ratio was 12～15%.It is mixed the back send into pyrolyzer by top with straw, rice husk (ratio is 75: 15: 10) by screw rod conveyor, handle through cracking, the inflammable gas that produces is cooled off by recirculated water, cooled gas is carried out dedusting, remove impurity, remove tar by wood sawdust, can make the gas of certain calorific value.
(2) implementation result
Gaseous constituent: O
2: 2～6%, H
2: 10～18%, N
2: 50～65%, CO:12～20%, CH
4: 1～3%, CO
2: 13～17%.
Gas heating value
Superior calorific value: 3.8～4.7KJ/M
3
Lower heat value: 2.8～4.4KJ/M
3
Gas incidence: 1KG does cow dung can produce about 1M
3Gas
Embodiment 2:
(1) technological process
After cow dung dried through the high speed drier, water ratio was 14～18%.It is mixed the back send into pyrolyzer by top with straw, rice husk (ratio is 70: 15: 15) by screw rod conveyor, handle through cracking, the inflammable gas that produces is cooled off by recirculated water, cooled gas is carried out dedusting, remove impurity, remove tar by wood sawdust, can make the gas of certain calorific value.
(2) implementation result
Gaseous constituent: O
2: 2～6%, H
2: 10～18%, N
2: 50～65%, CO:12～20%, CH
4: 1～3%, CO
2: 13～17%.
Gas heating value
Superior calorific value: 3.1～4.5KJ/M
3
Lower heat value: 2.6～4.0KJ/M
3
Gas incidence: 1KG does cow dung can produce 1M
3Gas
Embodiment 3:
1) technological process
Cow dung is through behind the drying machine drying, and water ratio is 16～18%.It is mixed the back send into pyrolyzer by top with straw, rice husk (ratio is 80: 10: 10) by screw rod conveyor, handle through cracking, the inflammable gas that produces is cooled off by recirculated water, cooled gas is carried out dedusting, remove impurity, remove tar by wood sawdust, can make the gas of certain calorific value.
(2) implementation result
Gaseous constituent: O
2: 2～6%, H
2: 10～18%, N
2: 50～65%, CO:12～20%, CH
4: 1～3%, CO
2: 13～17%.
Gas heating value
Superior calorific value: 3.4～4.6KJ/M
3
Lower heat value: 2.7～4.2KJ/M
3
Gas incidence: 1KG does cow dung can produce 1M
3Gas.
Claims (9)
1. cattle manure cracking gas-producing process is characterized in that comprising the steps:
(1) cow dung is dehydrated to water content be 11～18%;
(2) cow dung after will dehydrating is mixed by following weight ratio with straw, rice husk:
Cow dung: 60～80%, straw: 10～20%, rice husk: 10～20%
(3) mixture being sent into pyrolyzer, is 650～850 ℃ in temperature, and oxygen content is 3～8%, and cracking zone pressure is cracking under 0.05～0.15 atmospheric condition;
(4) inflammable gas that cracking is produced cools off;
(5) cooled gas is carried out dedusting, remove impurity;
(6) remove tar, promptly make desired gas;
2. cow dung gas-made technology as claimed in claim 1 is characterized in that dehydrating of cow dung can adopt the drying of high speed drier, drying machine drying or dry in three kinds of modes any one naturally, use also capable of being combined.
3. cow dung gas-made technology as claimed in claim 1, what it is characterized in that the middle employing of step (3) is the downdraft pyrolyzer.
4. cow dung gas-made technology as claimed in claim 1 is characterized in that the type of cooling in the step (4) both can be that air cooling also can be a water-cooled.
5. cow dung gas-made technology as claimed in claim 1 is characterized in that the temperature of inflammable gas after step (4) cooling should be reduced to below 200 ℃.
6. cow dung gas-made technology as claimed in claim 1 it is characterized in that step (5) can adopt any one in cyclone dust removal method or the spray method, but also both is used in combination.
7. as claim 1 or 6 described cow dung gas-made technologies, it is characterized in that by removing the above impurity particle of particle diameter 15 μ m in the inflammable gas in the step (5).
8. cow dung gas-made technology as claimed in claim 1 is characterized in that can using wood sawdust or other filter materials such as rice bran, wheat bran that inflammable gas is carried out dedusting by step (6).
9. cow dung gas-made technology as claimed in claim 1 is characterized in that should removing the tar more than 90% in the inflammable gas by step (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100954487A CN100402632C (en) | 2005-11-16 | 2005-11-16 | Cattle manure cracking gas-producing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100954487A CN100402632C (en) | 2005-11-16 | 2005-11-16 | Cattle manure cracking gas-producing process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1804008A CN1804008A (en) | 2006-07-19 |
| CN100402632C true CN100402632C (en) | 2008-07-16 |
Family
ID=36866157
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100954487A Expired - Fee Related CN100402632C (en) | 2005-11-16 | 2005-11-16 | Cattle manure cracking gas-producing process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100402632C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100494313C (en) * | 2008-02-15 | 2009-06-03 | 伍杰 | Method for producing liquefied gas and tar by using combustible materials such as firewood, grass and straw |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1583957A (en) * | 2004-06-08 | 2005-02-23 | 南京固体废弃物资源再生研究设计院 | Shard combusting process for producing gas |
-
2005
- 2005-11-16 CN CNB2005100954487A patent/CN100402632C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1583957A (en) * | 2004-06-08 | 2005-02-23 | 南京固体废弃物资源再生研究设计院 | Shard combusting process for producing gas |
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| Publication number | Publication date |
|---|---|
| CN1804008A (en) | 2006-07-19 |
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Granted publication date: 20080716 Termination date: 20111116 |