CN103589470A - Technology for preparing biogas through methane - Google Patents
Technology for preparing biogas through methane Download PDFInfo
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- CN103589470A CN103589470A CN201310572355.3A CN201310572355A CN103589470A CN 103589470 A CN103589470 A CN 103589470A CN 201310572355 A CN201310572355 A CN 201310572355A CN 103589470 A CN103589470 A CN 103589470A
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- biogas
- methane
- anaerobic fermentation
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 238000005516 engineering process Methods 0.000 title abstract description 6
- 238000000855 fermentation Methods 0.000 claims abstract description 62
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000007789 gas Substances 0.000 claims abstract description 28
- 239000002994 raw material Substances 0.000 claims abstract description 27
- 230000004151 fermentation Effects 0.000 claims abstract description 19
- 238000005406 washing Methods 0.000 claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 6
- 230000023556 desulfurization Effects 0.000 claims abstract description 6
- 238000010521 absorption reaction Methods 0.000 claims description 22
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 235000011089 carbon dioxide Nutrition 0.000 claims description 11
- 235000003599 food sweetener Nutrition 0.000 claims description 11
- 239000003345 natural gas Substances 0.000 claims description 11
- 239000003765 sweetening agent Substances 0.000 claims description 11
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims description 9
- 239000007864 aqueous solution Substances 0.000 claims description 9
- 229910000037 hydrogen sulfide Inorganic materials 0.000 claims description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 6
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical group Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 6
- MVFCKEFYUDZOCX-UHFFFAOYSA-N iron(2+);dinitrate Chemical compound [Fe+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MVFCKEFYUDZOCX-UHFFFAOYSA-N 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 claims description 5
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 claims description 5
- LDHBWEYLDHLIBQ-UHFFFAOYSA-M iron(3+);oxygen(2-);hydroxide;hydrate Chemical compound O.[OH-].[O-2].[Fe+3] LDHBWEYLDHLIBQ-UHFFFAOYSA-M 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 5
- 239000007858 starting material Substances 0.000 claims description 5
- 239000002699 waste material Substances 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-K Citrate Chemical compound [O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O KRKNYBCHXYNGOX-UHFFFAOYSA-K 0.000 claims description 3
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 3
- 239000011790 ferrous sulphate Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000005286 illumination Methods 0.000 claims description 3
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 3
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 claims description 3
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 3
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 230000029553 photosynthesis Effects 0.000 claims description 3
- 238000010672 photosynthesis Methods 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- 239000010865 sewage Substances 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000010802 sludge Substances 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 230000003009 desulfurizing effect Effects 0.000 abstract 1
- 230000032258 transport Effects 0.000 abstract 1
- 238000011282 treatment Methods 0.000 abstract 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 210000003608 fece Anatomy 0.000 description 3
- 239000010871 livestock manure Substances 0.000 description 3
- 238000003556 assay Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 239000010791 domestic waste Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Landscapes
- Treatment Of Sludge (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
A technology for preparing biogas through methane mainly comprises the steps as follows: raw material treatment, anaerobic fermentation, desulfurization, water washing, decarbonation, dewatering and storage, wherein a desulfurizing agent is added into an anaerobic fermentation tank while the anaerobic fermentation is conducted, so that the fermentation and the desulfurization are conducted simultaneously, a separate desulfurization device is omitted, and the cost is saved; in addition, a first storage tank and a second storage tank are arranged, and the second storage tank transports gases to the first storage tank according to pressure changes of the first storage tank. With the adoption of the technology for preparing the biogas through the methane, the technical problems that the anaerobic fermentation is low in gas production rate and unstable in gas supply quality are solved.
Description
Technical field
The present invention relates to a kind of biogas and prepare the technique of bio-natural gas.
Background technology
According to investigations, 2.5 hundred million tons of the annual output domestic wastes of China, more than 30 hundred million tons of fowl and animal excrements, 1,000,000,000 tons of crop materials, and these materials are the optimum feed stock of producing biogas.Biogas is a kind of have higher thermal value, clean inflammable gas.Along with the continuous increase of biogas output, collection effectively and reasonably, utilization, management process, utilize efficiently biogas to become effective control rural area and face pollution, renewable resource recycle, promote agricultural and environment sustainable development that the key of technical support is provided.
Biogas is prepared bio-natural gas in widespread attention and positive popularization in developed country, as the energy farm of the U.S., the project sunshine of the promulgation of the renewable energy source promotion law of Germany, Japan etc., China carries out biogas and prepares the research in bio-natural gas field and start from early eighties, with external property ratio, have larger gap, anaerobic digestion gas production rate is low, and system operation, supporting technology and equipment are also immature.
Summary of the invention
The problem to be solved in the present invention is to provide a kind of biogas and prepares bio-natural gas technique, solves anaerobic fermentation gas production rate low, the unsettled technical problem of quality of filling gas.For solving the problems of the technologies described above, the present invention includes following steps:
1. raw materials pretreatment
1.1 pulverize rear input in methane-generating pit by the starting material of manufacturing biogas, adjust the ratio of the composition of raw material, make its carbon-nitrogen ratio be: 20～30:1, pH value: between 6.8～7.5, and it is stirred, make raw material liquefaction;
Raw material in 1.2 pairs of methane-generating pits after 1.1 steps carries out desanding;
2. anaerobically fermenting
2.1 oxygen concentrations in methane-generating pit are lower than under preset concentration value condition, make in methane-generating pit the liquid after 1.2 steps enter in anaerobic fermentation tank and ferment;
2.2 meet after 2.1 step conditions, the raw material of methane-generating pit liquefaction enters in anaerobic fermentation tank and ferments, temperature in anaerobic fermentation tank is during lower than the temperature condition of default fermentor tank, anaerobic fermentation tank is heated, until the temperature in fermentor tank is while equaling the temperature of default anaerobic fermentation tank, heating-stopping apparatus work;
2.3 when 2.2 steps occur, in anaerobic fermentation tank, add sweetening agent, make the desulfurization of raw material synchronize and carry out with fermentation, the hydrogen sulfide that makes thus sweetening agent and raw material produce during the fermentation, generate water-fast sulfide, precipitation is discharged with discharging, and the mass ratio of desulfurizer therefor and fermentation raw material amount is 1～15:800;
2.4 in the whole process of anaerobically fermenting, and fermentation raw material is stirred, and stirring velocity is no more than 0.5m/s;
Waste material in 2.5 anaerobic fermentation tanks can be transmitted back to methane-generating pit again by being connected to the pipeline of methane-generating pit;
3. marsh gas purifying
3.1 pass into water washing tank by the biogas generating in anaerobic fermentation tank cleans, and the water yield in water washing tank is 1/3～2/3 of water washing tank volume;
3.2 by the biogas after 3.1 steps by being passed in gas buffer tank, make wherein pressure remain on 0.8～1.2Mpa, biogas in gas buffer tank is entered to absorption tower with the air input of 400-600L/h from bottom, absorption tower, keep tower internal pressure at 0.8～1.2Mpa, flow from top, absorption tower with 100-200L/h evenly sprays the alkaline aqueous solution downwards, biogas flows out from top, absorption tower through the aqueous solution, enters subsequent processing.Methane is difficult for melt water, and carbonic acid gas is soluble in the alkaline aqueous solution, content through the methane in sewage gas on absorption tower can reach 85%, water-soluble carbonic acid gas from absorption tower bottom along with current flow into a water reservoir, under the condition of illumination, carbonic acid gas carries out photosynthesis generation oxygen and enters in air, and the water cycle of water reservoir enters absorption tower;
3.3 pass into the biogas after 3.2 steps in tank by the inlet mouth bottom water knockout, by the air outlet of tank top, are discharged, and have water suction facility in described water knockout;
4 are stored into the biogas after 3.3 steps in hold-up vessel;
4.1 are stored into the biogas after 3.3 steps in the first hold-up vessel;
When 4.2 gas pressure sensors in the first hold-up vessel sense the first hold-up vessel gaseous tension and reach preset pressure, gas pressure sensor sends the first electrical signal, controller according to the first electrical signal, close the magnetic valve between water knockout and the first hold-up vessel and open water knockout and the second hold-up vessel between magnetic valve, when the gas pressure sensor in the first hold-up vessel senses the first hold-up vessel gaseous tension lower than preset pressure, the magnetic valve that controller is controlled between the second hold-up vessel and the first hold-up vessel is opened, when the second hold-up vessel gaseous tension reaches preset pressure value, controller cuts out the heating unit in anaerobic fermentation tank.
Preferred version is: the temperature in described anaerobic fermentation tank is controlled at 35～50 degree.
Preferred version is: the fermentation time of described anaerobic fermentation tank is 20～25 days.
Preferred version is: described methane-generating pit desanding adopts washing desanding mode.
Preferred version is: in described anaerobic fermentation tank, add active sludge to accelerate fermenting speed.
Preferred version is: described sweetening agent is molysite, comprises one or more in Ferrox, iron protochloride, ferrous sulfate, Iron nitrate, iron protocarbonate, iron(ic) chloride, ferric sulfate, iron nitrate, all molysite of ironic citrate.
The invention solves anaerobic fermentation gas production rate low, the unsettled technical problem of quality of filling gas, by the first hold-up vessel arranging, the second hold-up vessel has been guaranteed stability, continuity, the high efficiency of air feed, has realized the high-efficiency cleaning comprehensive utilization of matter and energy.
Embodiment
The feeding inlet of the impurity such as methane-generating pit and urinal, waste, opening for feed and methane-generating pit prevent methane-generating pit gas leakage by water-lute, methane-generating pit and anaerobically fermenting pot bottom are provided with mud relief outlet, after being pulverized, drop in methane-generating pit in the waste materials such as the pig manure of manufacture biogas, stalk, the ratio of adjusting the composition of raw material, makes its carbon-nitrogen ratio be: 20～30:1, pH value: between 6.8～7.5, and it is stirred, make raw material liquefaction; Starting material after liquefaction are carried out to desanding, and desanding mode can adopt washing desanding.
Oxygen concentration in methane-generating pit is lower than under preset concentration value condition, liquid in methane-generating pit is entered in anaerobic fermentation tank to ferment, temperature in anaerobic fermentation tank is during lower than the temperature condition of default fermentor tank, anaerobic fermentation tank is heated, the preset temp of fermentor tank can be arranged between 35～50 degree, be controlled at until the temperature in fermentor tank while equaling the temperature of default anaerobic fermentation tank, heating-stopping apparatus work, when fermentation occurs, in anaerobic fermentation tank, add sweetening agent, make the desulfurization of raw material synchronize and carry out with fermentation, the hydrogen sulfide that makes thus sweetening agent and raw material produce during the fermentation, generate water-fast sulfide, precipitation is discharged with discharging, the mass ratio of desulfurizer therefor and fermentation raw material amount is 1～600:800, sweetening agent can adopt molysite, comprise Ferrox, iron protochloride, ferrous sulfate, Iron nitrate, iron protocarbonate, iron(ic) chloride, ferric sulfate, iron nitrate, one or more in all molysite of ironic citrate.In the whole process of anaerobically fermenting, fermentation raw material is stirred, stirring velocity is no more than 0.5m/s; , the fermentation time of anaerobic fermentation tank was at 20～25 days, and the waste material in anaerobic fermentation tank can be transmitted back to methane-generating pit again by being connected to the pipeline of methane-generating pit; The biogas generating in anaerobic fermentation tank passes into water washing tank and cleans, the water yield in water washing tank is 1/3～2/3 of water washing tank volume, biogas after washing is passed in gas buffer tank, make wherein pressure remain on 0.8～1.2Mpa, biogas in gas buffer tank is entered to absorption tower with the air input of 400-600L/h from bottom, absorption tower, keep tower internal pressure at 0.8～1.2Mpa, flow from top, absorption tower with 100-200L/h evenly sprays the alkaline aqueous solution downwards, biogas flows out from top, absorption tower through the aqueous solution, enters subsequent processing.Methane is difficult for melt water, and carbonic acid gas is soluble in the alkaline aqueous solution, content through the methane in sewage gas on absorption tower can reach 85%, water-soluble carbonic acid gas from absorption tower bottom along with current flow into a water reservoir, under the condition of illumination, carbonic acid gas carries out photosynthesis and generates oxygen and enter in air, and the water cycle of water reservoir enters absorption tower, through the biogas on absorption tower, passes into water knockout.
Biogas after dehydration is stored in the first hold-up vessel, when the gas pressure sensor in the first hold-up vessel senses the first hold-up vessel gaseous tension and reaches preset pressure, gas pressure sensor sends the first electrical signal, controller according to the first electrical signal, close the magnetic valve between water knockout and the first hold-up vessel and open water knockout and the second hold-up vessel between magnetic valve, when the gas pressure sensor in the first hold-up vessel senses the first hold-up vessel gaseous tension lower than preset pressure, the magnetic valve that controller is controlled between the second hold-up vessel and the first hold-up vessel is opened, when the second hold-up vessel gaseous tension reaches preset pressure value, controller cuts out the heating unit in anaerobic fermentation tank.
Embodiment mono-: by pig manure, stalk starting material 50kg, by carbon-nitrogen ratio, be 20:1, PH:6.8, by above-mentioned steps, carry out fermentative processing, in anaerobic fermentation tank, add sweetening agent Ferrox, the ratio of Ferrox and raw material is: 1:600, and fermentation time: 20 days, anaerobic fermentation tank temperature: 35～40 degree
The biogas of above-mentioned generation is delivered to quality monitoring testing station check, rudimentary check report
| Sequence number | Interventions Requested | Assay |
| 1 | Methane, % (V/V) | 95.50 |
| 2 | Carbonic acid gas, % (V/V) | 4.15 |
| 3 | Nitrogen, % (V/V) | 0.34 |
| 4 | Hydrogen sulfide, % (V/V) | 0.003 |
Embodiment bis-: by pig manure, stalk starting material 100kg, by carbon-nitrogen ratio, be 30:1, PH:7.5, by above-mentioned steps, carry out fermentative processing, in anaerobic fermentation tank, add sweetening agent iron protochloride, the ratio of iron protochloride and raw material is: 1:800, and fermentation time: 25 days, anaerobic fermentation tank temperature: 35～40 degree.
The biogas of above-mentioned generation is delivered to quality monitoring testing station check, rudimentary check report
| Sequence number | Interventions Requested | Assay |
| 1 | Methane, % (V/V) | 96.40 |
| 2 | Carbonic acid gas, % (V/V) | 3.26 |
| 3 | Nitrogen, % (V/V) | 0.34 |
| 4 | Hydrogen sulfide, % (V/V) | 0.002 |
Generally fire damp content is 55%～70%, carbon dioxide content is 28%～44%, hydrogen sulfide average content is 0.034%, and the methane concentration (96.4) that the present invention produces is higher than its maximum range value (70%), and concentration of hydrogen sulfide (0.002%) is far below biogas concentration of hydrogen sulfide (0.034%) generally, therefore not only methane concentration is high for the biogas that the present invention produces, and concentration of hydrogen sulfide is very low, it is the domestic energy of cleaner health.
Claims (6)
1. biogas is prepared a technique for bio-natural gas, it is characterized in that, comprises the following steps;
1. raw materials pretreatment
1.1 pulverize rear input in methane-generating pit by the starting material of manufacturing biogas, adjust the ratio of the composition of raw material, make its carbon-nitrogen ratio be: 20～30:1, pH value: between 6.8～7.5, and it is stirred, make raw material liquefaction;
Raw material in 1.2 pairs of methane-generating pits after 1.1 steps carries out desanding;
2. anaerobically fermenting
2.1 oxygen concentrations in methane-generating pit are lower than under preset concentration value condition, make in methane-generating pit the liquid after 1.2 steps enter in anaerobic fermentation tank and ferment;
2.2 meet after 2.1 step conditions, the raw material of methane-generating pit liquefaction enters in anaerobic fermentation tank and ferments, temperature in anaerobic fermentation tank is during lower than the temperature condition of default fermentor tank, anaerobic fermentation tank is heated, until the temperature in fermentor tank is while equaling the temperature of default anaerobic fermentation tank, heating-stopping apparatus work;
2.3 when 2.2 steps occur, in anaerobic fermentation tank, add sweetening agent, make the desulfurization of raw material synchronize and carry out with fermentation, the hydrogen sulfide that makes thus sweetening agent and raw material produce during the fermentation, generate water-fast sulfide, precipitation is discharged with discharging, and the mass ratio of desulfurizer therefor and fermentation raw material amount is 1～600:800;
2.4 in the whole process of anaerobically fermenting, and fermentation raw material is stirred, and stirring velocity is no more than 0.5m/s;
Waste material in 2.5 anaerobic fermentation tanks can be transmitted back to methane-generating pit again by being connected to the pipeline of methane-generating pit;
3. marsh gas purifying
3.1 pass into water washing tank by the biogas generating in anaerobic fermentation tank cleans, and the water yield in water washing tank is 1/3～2/3 of water washing tank volume;
3.2 by the biogas after 3.1 steps by being passed in gas buffer tank, make wherein pressure remain on 0.8～1.2Mpa, biogas in gas buffer tank is entered to absorption tower with the air input of 400-600L/h from bottom, absorption tower, keep tower internal pressure at 0.8～1.2Mpa, flow from top, absorption tower with 100-200L/h evenly sprays the alkaline aqueous solution downwards, biogas flows out from top, absorption tower through the aqueous solution, enters subsequent processing.Methane is difficult for melt water, and carbonic acid gas is soluble in the alkaline aqueous solution, content through the methane in sewage gas on absorption tower can reach 85%, water-soluble carbonic acid gas from absorption tower bottom along with current flow into a water reservoir, under the condition of illumination, carbonic acid gas carries out photosynthesis generation oxygen and enters in air, and the water cycle of water reservoir enters absorption tower;
3.3 pass into the biogas after 3.2 steps in tank by the inlet mouth bottom water knockout, by the air outlet of tank top, are discharged, and have water suction facility in described water knockout;
4 are stored into the biogas after 3.3 steps in hold-up vessel;
4.1 are stored into the biogas after 3.3 steps in the first hold-up vessel;
When 4.2 gas pressure sensors in the first hold-up vessel sense the first hold-up vessel gaseous tension and reach preset pressure, gas pressure sensor sends the first electrical signal, controller according to the first electrical signal, close the magnetic valve between water knockout and the first hold-up vessel and open water knockout and the second hold-up vessel between magnetic valve, when the gas pressure sensor in the first hold-up vessel senses the first hold-up vessel gaseous tension lower than preset pressure, the magnetic valve that controller is controlled between the second hold-up vessel and the first hold-up vessel is opened, when the second hold-up vessel gaseous tension reaches preset pressure value, controller cuts out the heating unit in anaerobic fermentation tank.
2. biogas according to claim 1 is prepared bio-natural gas technique, it is characterized in that, the temperature in described anaerobic fermentation tank is controlled at 35～50 degree.
3. biogas according to claim 1 is prepared bio-natural gas technique, it is characterized in that, the fermentation time of described anaerobic fermentation tank is 20～25 days.
4. biogas according to claim 1 is prepared bio-natural gas technique, it is characterized in that, described methane-generating pit desanding adopts washing desanding mode.
5. biogas according to claim 1 is prepared bio-natural gas technique, it is characterized in that, adds active sludge to accelerate fermenting speed in described anaerobic fermentation tank.
6. biogas according to claim 1 is prepared bio-natural gas technique, it is characterized in that, described sweetening agent is molysite, comprises one or more in Ferrox, iron protochloride, ferrous sulfate, Iron nitrate, iron protocarbonate, iron(ic) chloride, ferric sulfate, iron nitrate, all molysite of ironic citrate.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107099555A (en) * | 2017-06-30 | 2017-08-29 | 合肥慧明瀚生态农业科技有限公司 | A kind of method for carrying out biogas production as raw material with Chinese medicine dreg |
| CN108690804A (en) * | 2018-06-14 | 2018-10-23 | 山东中农绿能工程设计有限公司 | Bio-natural gas production system and control method |
| CN111500647A (en) * | 2020-05-21 | 2020-08-07 | 新沂百川畅银新能源有限公司 | Biogas anaerobic preparation process based on agricultural and forestry wastes |
| CN114196654A (en) * | 2021-12-17 | 2022-03-18 | 黑龙江省农业科学院农村能源与环保研究所 | Complex enzyme preparation, preparation method thereof and method for producing biogas |
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| CN111500647A (en) * | 2020-05-21 | 2020-08-07 | 新沂百川畅银新能源有限公司 | Biogas anaerobic preparation process based on agricultural and forestry wastes |
| CN114196654A (en) * | 2021-12-17 | 2022-03-18 | 黑龙江省农业科学院农村能源与环保研究所 | Complex enzyme preparation, preparation method thereof and method for producing biogas |
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|---|---|
| CN103589470B (en) | 2016-05-18 |
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