CN114107022A - Anti-blocking spray head, application of anti-blocking spray head in methane production efficiency improvement and method for improving methane production efficiency - Google Patents
Anti-blocking spray head, application of anti-blocking spray head in methane production efficiency improvement and method for improving methane production efficiency Download PDFInfo
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- 239000007921 spray Substances 0.000 title claims abstract description 98
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- 238000005507 spraying Methods 0.000 claims abstract description 102
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- 238000000855 fermentation Methods 0.000 claims abstract description 77
- 230000004151 fermentation Effects 0.000 claims abstract description 62
- 239000000463 material Substances 0.000 claims abstract description 19
- 239000007788 liquid Substances 0.000 claims description 24
- 150000007524 organic acids Chemical class 0.000 claims description 18
- 238000010992 reflux Methods 0.000 claims description 7
- 230000000903 blocking effect Effects 0.000 abstract description 4
- 238000001914 filtration Methods 0.000 description 13
- 239000000523 sample Substances 0.000 description 10
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002154 agricultural waste Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 210000003608 fece Anatomy 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The invention relates to the field of biogas fermentation, in particular to an anti-blocking spray head and an application thereof in improving methane production efficiency and a method for improving methane production efficiency. The anti-blocking spray head provided by the invention effectively avoids the blocking phenomenon when biogas slurry flows back, reduces the failure rate of biogas fermentation operation, enables the fermentation process to operate more efficiently, and thus improves the efficiency of methane production; in addition, the anti-blocking spray head provided by the invention can enable the biogas slurry to be mixed more uniformly, so that the biogas slurry is uniformly sprayed on the fermented material, and further the methane production efficiency is improved; in addition, the invention can build the best dry anaerobic fermentation condition by a variable frequency spraying mode, improve the methane yield and further improve the methane production efficiency.
Description
Technical Field
The invention relates to the field of biogas fermentation, in particular to an anti-blocking spray head and an application thereof in improving methane production efficiency and a method for improving methane production efficiency.
Background
The yield of the solid agricultural rural waste in China is huge, and the anaerobic dry fermentation technology is applied as a technology for treating agricultural waste in a large scale to realize resource utilization. However, the solid content of the fermentation materials in the anaerobic dry fermentation technology is high, the filtered biogas slurry has more impurities, the direct backflow biogas slurry is sprayed, so that the unfermented substances in the biogas slurry cannot be uniformly sprayed on the materials, and the backflow biogas slurry has more impurities, so that the nozzle is easily blocked, and the gas production efficiency is affected.
Disclosure of Invention
In order to solve the problems, the invention provides an anti-blocking spray head, application of the anti-blocking spray head in improving methane production efficiency and a method for improving methane production efficiency. The anti-clogging spray head provided by the invention not only can uniformly spray the backflow biogas slurry on the material, but also can effectively prevent and treat clogging.
In order to achieve the above purpose, the invention provides the following technical scheme:
the invention provides an anti-blocking spray head which comprises a spray head cavity 1 and a platform 2 fixed in the spray head cavity 1;
the platforms comprise a first platform 3, a second platform 4 and a third platform 5 which are parallel to each other;
the first platform 3 is arranged at a liquid outlet of the spray head cavity 1; a second platform 4 and a third platform 5 are sequentially arranged between the first platform 3 and a liquid inlet in the spray head cavity 1;
the area of the central hole of the first platform 3 is 1.1-2.2 cm2(ii) a The diameter of the first platform 3 in the spray head cavity 1 is 1.5-3 cm;
the area of the central hole of the second platform 4 is 1.4-2.2 cm2(ii) a The diameter of the second platform 4 in the spray head cavity 1 is 1.8-2.3 cm;
the area of the center hole of the third platform 5 is 2-3.5 cm2(ii) a The diameter of the third platform 5 in the spray head cavity 1 is 2.3-4 cm.
Preferably, the vertical distance between the first platform 3 and the second platform 4 is 1-2 cm;
the vertical distance between the second platform 4 and the third platform 5 is 2-3.5 cm;
the vertical distance between the third platform 5 and a liquid inlet in the spray head cavity 1 is 2.5-4 cm.
Preferably, the nozzle chamber 1 further comprises a connecting structure 6; the connecting structure 6 is arranged at a liquid inlet of the spray head cavity 1.
Preferably, the area of the liquid inlet is 2.3-4 cm2。
Preferably, the thicknesses of the first platform 3, the second platform 4 and the third platform 5 are 0.3-0.5 cm respectively.
The invention also provides application of the anti-blocking spray head in improving methane production efficiency.
The invention also provides a method for improving methane production efficiency, which comprises the following steps:
spraying exogenous biogas slurry on the fermented material by using the anti-clogging spray head, and starting anaerobic fermentation;
taking out biogas slurry generated by anaerobic fermentation, and refluxing the biogas slurry to a fermentation system; adjusting the spraying frequency to ensure that the pH value of the biogas slurry generated by fermentation is 6.8-7.2;
when the concentration of organic acid in the biogas slurry generated by fermentation is more than or equal to 4g/L/d, spraying for 5 minutes at every half an hour; when the organic acid is less than 4g/L/d, adjusting the spraying frequency to ensure that the pH value of the biogas slurry generated by fermentation is 6.8-7.2; the amount of the biogas sprayed for one minute is 10 to 15 percent of the mass of the dry matter of the fermentation material;
stopping spraying when the ORP value is more than or equal to-180, and continuing spraying when the ORP value is less than-180, so that the pH value of the biogas slurry generated by fermentation is 6.8-7.2.
Preferably, the frequency of the spraying is related to the time when the first spraying starts; in terms of the time at which the first spray started:
spraying for 4 minutes every 1 hour within two days after the spraying is started; when the pH value is less than 6.8, the spraying frequency is 6 minutes every 1 hour, and when the pH value is more than 7.2, the spraying frequency is 3 minutes every 1 hour;
spraying for 4 minutes every 2 hours within 3-7 days after the spraying is started; when the pH value is less than 6.8, spraying for 6 minutes every 2 hours at the spraying frequency, and when the pH value is more than 7.2, spraying for 3 minutes every 2 hours at the spraying frequency;
spraying for 4 minutes every 4 hours from the 8 th day of the beginning of spraying to the end of fermentation; when the pH value is less than 6.8, the spraying frequency is 6 minutes every 4 hours, and when the pH value is more than 7.2, the spraying frequency is 3 minutes every 4 hours.
Preferably, the fermentation temperature is 38-48 ℃.
Has the advantages that:
the invention provides an anti-blocking spray head which comprises a spray head cavity 1 and a platform 2 fixed in the spray head cavity 1; the platforms comprise a first platform 3, a second platform 4 and a third platform 5 which are parallel to each other; the first platform 3 is arranged at a liquid outlet of the spray head cavity 1; a second platform 4 and a third platform 5 are sequentially arranged between the first platform 3 and a liquid inlet in the spray head cavity 1; the area of the central hole of the first platform 3 is 1.1-2.2 cm2(ii) a The diameter of the first platform 3 in the spray head cavity 1 is 1.5-3 cm; the area of the central hole of the second platform 4 is 1.4-2.2 cm2(ii) a The diameter of the second platform 4 in the spray head cavity 1 is 1.8-2.3 cm; the area of the center hole of the third platform 5 is 2-3.5 cm2(ii) a The diameter of the third platform 5 in the spray head cavity 1 is 2.3-4 cm. The anti-blocking spray head provided by the invention is provided with the three layers of internal platforms, so that biogas slurry can collide with the three layers of platforms, and the biogas slurry is uniformly sprayed on materials; by setting a suitable free and unblocked diameter, blockage can be effectively prevented.
Drawings
Fig. 1 is a schematic structural diagram of an anti-clogging showerhead, wherein 1 is a showerhead chamber, 2 is a stage, 3 is a first stage, 4 is a second stage, 5 is a third stage, and 6 is a connecting structure;
FIG. 2 is a schematic view of an anaerobic fermentation device, wherein 7 is a pH probe, 8 is an ORP probe, 9 is a biogas fermentation device, 10 is a filtering device, 11 is an anti-clogging nozzle, 12 is a biogas slurry pool, 13 is a biogas fermentation area, 14 is a biogas slurry collecting area, 15 is a biogas slurry reflux pump, and 16 is a biogas slurry spray pump;
fig. 3 is a flow chart of the spray frequency.
Detailed Description
The invention provides an anti-blocking spray head which comprises a spray head cavity 1 and a platform 2 fixed in the spray head cavity 1;
the platforms comprise a first platform 3, a second platform 4 and a third platform 5 which are parallel to each other;
the first platform 3 is arranged at a liquid outlet of the spray head cavity 1; a second platform 4 and a third platform 5 are sequentially arranged between the first platform 3 and a liquid inlet in the spray head cavity 1;
the first platform 3 is arranged at a liquid outlet of the spray head cavity 1; a second platform 4 and a third platform 5 are sequentially arranged between the first platform 3 and a liquid inlet in the spray head cavity 1;
the area of the central hole of the first platform 3 is 1.1-2.2 cm2(ii) a The diameter of the first platform 3 in the spray head cavity 1 is 1.5-3 cm;
the area of the central hole of the second platform 4 is 1.4-2.2 cm2(ii) a The diameter of the second platform 4 in the spray head cavity 1 is 1.8-2.3 cm;
the area of the center hole of the third platform 5 is 2-3.5 cm2(ii) a The diameter of the third platform 5 in the spray head cavity 1 is 2.3-4 cm.
In the present invention, the vertical distance between the first platform 3 and the second platform 4 is preferably 1 cm; the vertical distance between the second platform 4 and the third platform 5 is preferably 2-3.5 cm, and more preferably 2 cm; the vertical distance between the third platform 5 and a liquid inlet in the spray head cavity 1 is preferably 2.5-4 cm, and more preferably 2.5 cm; the area of the liquid inlet is 2.3-4 cm2Is more excellentIs selected to be 3.5cm2(ii) a The thicknesses of the first platform 3, the second platform 4 and the third platform 5 are preferably 0.3-0.5 cm respectively.
In the invention, the spray head cavity 1 further comprises a connecting structure 6; the connecting structure 6 is arranged at a liquid inlet of the spray head cavity 1; said connection structure 6 preferably comprises a threaded connection; the specific structural schematic diagram of the anti-clogging spray head is shown in figure 1. According to the invention, the three layers of platforms are arranged in the spray head cavity, and the appropriate hole area is arranged, so that blockage can be effectively prevented, and the biogas slurry can be mixed more uniformly through collision of the biogas slurry and the three layers of platforms, so that the biogas slurry is uniformly sprayed on the fermentation material, and further the methane production efficiency is improved.
The invention also provides application of the anti-blocking spray head in improving methane production efficiency. The anti-blocking spray head provided by the invention can effectively avoid the blocking phenomenon when biogas slurry flows back, reduce the failure rate of biogas fermentation operation, and enable the fermentation process to operate more efficiently, thereby improving the efficiency of methane production; in addition, the anti-blocking spray head provided by the invention can enable the biogas slurry to be mixed more uniformly, so that the biogas slurry is uniformly sprayed on the fermentation material, and further the methane production efficiency is improved.
The invention also provides a method for improving methane production efficiency, which comprises the following steps:
spraying exogenous biogas slurry on the fermented material by using the anti-clogging spray head, and starting anaerobic fermentation;
taking out biogas slurry generated by anaerobic fermentation, and refluxing the biogas slurry to a fermentation system; adjusting the spraying frequency to ensure that the pH value of the biogas slurry generated by fermentation is 6.8-7.2;
when the concentration of organic acid in the biogas slurry generated by fermentation is more than or equal to 4g/L/d, spraying for 5 minutes at every half an hour; when the organic acid is less than 4g/L/d, adjusting the spraying frequency to ensure that the pH value of the biogas slurry generated by fermentation is 6.8-7.2; the amount of the biogas sprayed for one minute is 10 to 15 percent of the mass of the dry matter of the fermentation material;
stopping spraying when the ORP value is more than or equal to-180, and continuing spraying when the ORP value is less than-180, so that the pH value of the biogas slurry generated by fermentation is 6.8-7.2.
In the present invention, the frequency of the spraying is preferably related to the time at which the first spraying starts; in terms of the time at which the first spray started:
within two days after the spraying is started, the spraying frequency is preferably 4 minutes every 1 hour; when the pH value is less than 6.8, the spraying frequency is preferably 6 minutes every 1 hour, and when the pH value is more than 7.2, the spraying frequency is 3 minutes every 1 hour;
spraying for 4 minutes every 2 hours within 3-7 days after the spraying is started; when the pH value is less than 6.8, spraying for 6 minutes every 2 hours at the spraying frequency, and when the pH value is more than 7.2, spraying for 3 minutes every 2 hours at the spraying frequency;
spraying for 4 minutes every 4 hours from the 8 th day of the beginning of spraying to the end of fermentation; when the pH value is less than 6.8, the spraying frequency is 6 minutes every 4 hours, and when the pH value is more than 7.2, the spraying frequency is 3 minutes every 4 hours. The method provided by the invention utilizes the anti-blocking spray head to effectively avoid the blocking phenomenon when the biogas slurry flows back, reduces the failure rate of biogas fermentation operation, and enables the fermentation process to operate more efficiently, thereby improving the efficiency of methane production; in addition, the anti-blocking spray head provided by the invention can enable the biogas slurry to be mixed more uniformly, so that the biogas slurry is uniformly sprayed on the fermented material, and further the methane production efficiency is improved; in addition, the invention can build the best dry anaerobic fermentation condition by a variable frequency spraying mode, improve the methane yield and further improve the methane production efficiency.
In the invention, the fermentation temperature is preferably 38-48 ℃, and more preferably 42 ℃.
The invention preferably also provides an anaerobic fermentation device, which comprises a pH probe 7, an ORP probe 8, a biogas fermentation device 9, a filtering device 10, the anti-blocking spray head 11 and a biogas slurry pool 12; the biogas fermentation device 9 preferably comprises a biogas fermentation zone 13 and a biogas slurry collection zone 14.
In the present invention, the pH probe 7 and ORP probe 8 are preferably disposed in the biogas slurry collection zone 14; the filtering device 10 is preferably arranged between the biogas fermentation zone 13 and the biogas slurry collecting zone 14, and the shape of the filtering device 10 preferably comprises a plate-shaped structure; the filtering pore size of the filtering device 10 is preferably 0.3-0.6 cm, and more preferably 0.4 cm; the biogas slurry collecting zone 14 is preferably connected with the biogas slurry tank 12; the biogas slurry collecting zone 14 is preferably connected with the biogas slurry tank 12 through a biogas slurry reflux pump 15; the biogas fermentation area 13 is preferably connected with a biogas slurry pool 12; the biogas fermentation area 13 is preferably connected with the biogas slurry pool 12 through a biogas slurry spraying pump 16. According to the invention, the filtering device 10 is arranged, so that not only can the biogas slurry and biogas residues generated by fermentation in the biogas fermentation area 13 be separated, but also large granular substances in the biogas slurry can be intercepted, the blockage of the spray head is further prevented, and the biogas slurry generated by fermentation is collected in the biogas slurry tank 12, so that not only can the fermentation efficiency be prevented from being influenced by the direct mixing of the fermentation materials and the biogas slurry, but also the spraying frequency can be accurately regulated and controlled by spraying the biogas slurry back to the biogas fermentation area 13, the optimal dry anaerobic fermentation condition is created, the methane yield is increased, and the methane production efficiency is further increased.
For further illustration of the present invention, the following detailed description will be made with reference to the drawings and examples to provide an anti-clogging spray head and its application in methane production efficiency improvement and a method for improving methane production efficiency, but they should not be construed as limiting the scope of the present invention.
Example 1
An anti-clogging spray head comprises a spray head cavity 1 and a platform 2 fixed in the spray head cavity 1, wherein the specific structure is shown in figure 1;
the platform consists of a first platform 3, a second platform 4 and a third platform 5 which are parallel to each other;
the first platform 3 is arranged at a liquid outlet of the spray head cavity 1; a second platform 4 and a third platform 5 are sequentially arranged between the first platform 3 and a liquid inlet in the spray head cavity 1;
the area of the central hole of the first platform 3 is 1.2cm2(ii) a The diameter of the first platform 3 in the spray head cavity 1 is 1.5 cm;
the area of the central hole of the second platform 4 is 1.4cm2(ii) a The diameter of the second platform 4 in the spray head cavity 1 is 1.8 cm;
center of the third platform 5The area of the hole is 2cm2(ii) a The diameter of the third platform 5 in the spray head cavity 1 is 2.3 cm;
the vertical distance between the first platform 3 and the second platform 4 is 1 cm; the vertical distance between the second platform 4 and the third platform 5 is 2 cm; the vertical distance between the third platform 5 and a liquid inlet in the spray head cavity 1 is 2.5 cm; the diameter of the liquid inlet is 3.5 cm; the thicknesses of the first platform 3, the second platform 4 and the third platform 5 are all 0.4 cm;
and a liquid inlet of the spray head cavity 1 is provided with a connecting structure 6 (in threaded connection).
Example 2
An anaerobic fermentation device comprises a pH probe 7, an ORP probe 8, a biogas fermentation device 9, a filtering device 10 (a filtering baffle), the anti-blocking spray head 11, a biogas slurry pool 12, a biogas slurry reflux pump 15 and a biogas slurry spraying pump 16; the biogas fermentation device 9 consists of a biogas fermentation area 13 and a biogas slurry collection area 14.
As shown in fig. 2, the pH probe 7 and the ORP probe 8 are arranged in the biogas slurry collecting zone 14; the filtering device 10 (filtering baffle) is arranged between the biogas fermentation area 13 and the biogas slurry collecting area 14; the filtering aperture of the filtering device 10 is 0.5 cm; the biogas slurry collecting area 14 is connected with the biogas slurry pool 12 through a biogas slurry reflux pump 15; the biogas fermentation area 13 is connected with a biogas slurry pool 12 through a biogas slurry spraying pump 16.
Application example 1
A method for improving methane production efficiency comprises the following steps (shown in a flow chart in figure 3):
the straw and the cow dung are mixed as raw materials, the solid content of the mixed materials is 25%, and the experimental device is 1m2The garage type dry anaerobic fermentation reactor (the apparatus prepared in example 2) of (1), carrying out anaerobic dry fermentation at 42 ℃; 300kg of materials are put into the reactor, and the amount of the biogas slurry sprayed for one minute is 10 percent of the dry mass of the materials and is 7.5 kg.
Starting dry anaerobic fermentation by spraying exogenous biogas slurry, setting the spraying frequency of the first two days to be 4 minutes every 1 hour in terms of the time of starting the first spraying, monitoring the pH, the ORP and the concentration of organic acid in real time, changing the spraying frequency to 6 minutes every 1 hour when the pH value is less than 6.8, and regulating the spraying frequency to 3 minutes every 1 hour when the pH value is more than 7.2, so that the pH value of the leachate is controlled between 6.8 and 7.2; when the concentration of the organic acid is more than 4g/L/d, the spraying frequency is changed to spraying for 5 minutes every half an hour to quickly flush the organic acid, when the organic acid drops to be less than 4g/L/d, the initial frequency is changed, the spraying is stopped when the ORP value is more than-180, and the spraying frequency is continued to be sprayed according to the spraying frequency of the previous two days when the ORP value is less than-180;
and (3) setting the spraying frequency of 3 rd to 7 th days as the time for starting the first spraying to spray for 4 minutes every 2 hours, monitoring the pH, the ORP and the concentration of the organic acid in real time, changing the spraying frequency to spray for 6 minutes every 2 hours when the pH value is less than 6.8, and regulating the spraying frequency to spray for 3 minutes every 2 hours when the pH value is more than 7.2 so as to control the pH value of the percolate to be between 6.8 and 7.2. When the concentration of the organic acid is more than 4g/L/d, the spraying frequency is changed to spraying for 5 minutes every half an hour, the organic acid is quickly flushed, when the organic acid is reduced to be less than 4g/L/d, the initial frequency is changed, the spraying is stopped when the ORP value is more than-180, and the spraying frequency is continued to spraying when the ORP value is less than-180 according to the spraying frequency of the day 3 to 7;
and (3) setting the spraying frequency from 8 th day to the end of fermentation to be 4 minutes every 4 hours by the time of the beginning of the first spraying, monitoring the pH, the ORP and the concentration of the organic acid in real time, changing the spraying frequency to 6 minutes every 4 hours when the pH value is less than 6.8, and regulating the spraying frequency to 3 minutes every 4 hours when the pH value is more than 7.2, so that the pH value of the percolate is controlled between 6.8 and 7.2. When the concentration of the organic acid is more than 4g/L/d, the spraying frequency is changed to spraying for 5 minutes every half an hour to quickly flush the organic acid, when the organic acid is reduced to be less than 4g/L/d, the initial frequency is changed, the spraying is stopped when the ORP value is more than-180, and the spraying frequency is continued to spraying when the ORP value is less than-180 according to the spraying frequency from the 8 th day to the end of fermentation.
The experiment is carried out for 24 days, the spray head is not blocked, and the volume gas production rate reaches 1.8m3/m3/d。
In conclusion, the method provided by the invention effectively avoids the blocking phenomenon when the biogas slurry flows back by using the anti-blocking spray head, reduces the failure rate of biogas fermentation operation, enables the fermentation process to operate more efficiently, and thus improves the methane production efficiency; in addition, the anti-blocking spray head provided by the invention can enable the biogas slurry to be mixed more uniformly, so that the biogas slurry is uniformly sprayed on the fermented material, and further the methane production efficiency is improved; in addition, the invention can build the best dry anaerobic fermentation condition by a variable frequency spraying mode, improve the methane yield and further improve the methane production efficiency.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (9)
1. The anti-blocking spray head is characterized by comprising a spray head cavity (1) and a platform (2) fixed in the spray head cavity (1);
the platform comprises a first platform (3), a second platform (4) and a third platform (5) which are parallel to each other;
the first platform (3) is arranged at a liquid outlet of the spray head cavity (1); a second platform (4) and a third platform (5) are sequentially arranged between the first platform (3) and a liquid inlet in the spray head cavity (1);
the area of the central hole of the first platform (3) is 1.1-2.2 cm2(ii) a The diameter of the first platform (3) in the spray head cavity (1) is 1.5-3 cm;
the area of the central hole of the second platform (4) is 1.4-2.2 cm2(ii) a The diameter of the second platform (4) in the spray head cavity (1) is 1.8-2.3 cm;
the area of the central hole of the third platform (5) is 2-3.5 cm2(ii) a The diameter of the third platform (5) in the spray head cavity (1) is 2.3-4 cm.
2. Anti-clogging spray head according to claim 1, characterized in that the vertical distance between said first platform (3) and said second platform (4) is 1-2 cm;
the vertical distance between the second platform (4) and the third platform (5) is 2-3.5 cm;
the vertical distance between the third platform (5) and a liquid inlet in the spray head cavity (1) is 2.5-4 cm.
3. Anti-clogging spray head according to claim 1 or 2, characterized in that said spray head chamber (1) further comprises a connection structure (6); the connecting structure (6) is arranged at a liquid inlet of the spray head cavity (1).
4. The anti-clogging spray head according to claim 1 or 2, wherein the area of the liquid inlet is 2.3-4 cm2。
5. Anti-clogging spray head according to claim 1 or 2, characterized in that said first (3), second (4) and third (5) platforms have a thickness of 0.3-0.5 cm, respectively.
6. The use of the anti-clogging spray head of any one of claims 1 to 6 for improving methane production efficiency.
7. The method for improving methane production efficiency is characterized by comprising the following steps:
spraying exogenous biogas slurry onto a fermentation material by using the anti-clogging spray head of any one of claims 1 to 6, and starting anaerobic fermentation;
taking out biogas slurry generated by anaerobic fermentation, and refluxing the biogas slurry to a fermentation system; adjusting the spraying frequency to ensure that the pH value of the biogas slurry generated by fermentation is 6.8-7.2;
when the concentration of organic acid in the biogas slurry generated by fermentation is more than or equal to 4g/L/d, spraying for 5 minutes at every half an hour; when the organic acid is less than 4g/L/d, adjusting the spraying frequency to ensure that the pH value of the biogas slurry generated by fermentation is 6.8-7.2; the amount of the biogas sprayed for one minute is 10 to 15 percent of the mass of the dry matter of the fermentation material;
stopping spraying when the ORP value is more than or equal to-180, and continuing spraying when the ORP value is less than-180, so that the pH value of the biogas slurry generated by fermentation is 6.8-7.2.
8. The method of claim 7, wherein the frequency of the sprays is related to the time at which the first spray begins; in terms of the time at which the first spray started:
spraying for 4 minutes every 1 hour within two days after the spraying is started; when the pH value is less than 6.8, the spraying frequency is 6 minutes every 1 hour, and when the pH value is more than 7.2, the spraying frequency is 3 minutes every 1 hour;
spraying for 4 minutes every 2 hours within 3-7 days after the spraying is started; when the pH value is less than 6.8, spraying for 6 minutes every 2 hours at the spraying frequency, and when the pH value is more than 7.2, spraying for 3 minutes every 2 hours at the spraying frequency;
spraying for 4 minutes every 4 hours from the 8 th day of the beginning of spraying to the end of fermentation; when the pH value is less than 6.8, the spraying frequency is 6 minutes every 4 hours, and when the pH value is more than 7.2, the spraying frequency is 3 minutes every 4 hours.
9. The method according to claim 7, wherein the temperature of the fermentation is 38-48 ℃.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2602320A1 (en) * | 2007-10-22 | 2009-04-22 | Nikolay Gnatenko | Uniform irrigation sprinkler with anti-clogging capability |
| CN206867981U (en) * | 2017-05-05 | 2018-01-12 | 白银有色集团股份有限公司 | A kind of desulfurizing tower fluid jetting head |
| CN108504557A (en) * | 2018-06-21 | 2018-09-07 | 农业部规划设计研究院 | A kind of anaerobic dry fermentation on-line early warning regulating device and method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2602320A1 (en) * | 2007-10-22 | 2009-04-22 | Nikolay Gnatenko | Uniform irrigation sprinkler with anti-clogging capability |
| CN206867981U (en) * | 2017-05-05 | 2018-01-12 | 白银有色集团股份有限公司 | A kind of desulfurizing tower fluid jetting head |
| CN108504557A (en) * | 2018-06-21 | 2018-09-07 | 农业部规划设计研究院 | A kind of anaerobic dry fermentation on-line early warning regulating device and method |
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