CN106754321B - Intelligent control diphasic anaerobic biomembrane marsh gas fermenting system and technique - Google Patents
Intelligent control diphasic anaerobic biomembrane marsh gas fermenting system and technique Download PDFInfo
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- CN106754321B CN106754321B CN201611143569.9A CN201611143569A CN106754321B CN 106754321 B CN106754321 B CN 106754321B CN 201611143569 A CN201611143569 A CN 201611143569A CN 106754321 B CN106754321 B CN 106754321B
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Abstract
The present invention relates to intelligent control diphasic anaerobic biomembrane marsh gas fermenting system and techniques, including hydrolysis acidification phase installation for fermenting, methanogenic phase installation for fermenting and PLC intelligent controller, it is characterized by: setting acidification material storing equipment for separating liquid from solid between hydrolysis acidification phase installation for fermenting and methanogenic phase installation for fermenting, it is acidified material storing equipment for separating liquid from solid lower part and is equipped with acidifying solution feed inlet, top is equipped with acidifying solution discharge port, bottom is equipped with residue discharge port, acidifying solution feed pump is equipped between acidifying solution feed inlet and the discharge port of hydrolysis acidification phase installation for fermenting, residue reflux pump is equipped between residue discharge port and the feed inlet of hydrolysis acidification phase installation for fermenting, methanogenic phase feed pump is equipped between acidifying solution discharge port and the feed inlet of methanogenic phase installation for fermenting.Based on biological phase detachment technique, system charging and discharging organic loading, temperature, mechanical stirring and biogas slurry reflux duty etc. are accurately controlled, realizes the preparation of organic waste efficient cryogenic biogas.
Description
Technical field
The present invention relates to organic waste anaerobic fermentation methane phase technical field, especially a kind of intelligent control diphasic anaerobic
Biomembrane marsh gas fermenting system and technique.
Background technique
With increasingly exhausted, heat of the development and utilization of renewable energy as countries in the world research of a fossil energy
Point.Using anaerobic fermentation technology by all kinds of debirs, as feces of livestock and poultry, house refuse, sewage sludge and processing of farm products are useless
Object etc. is converted into biological flue gas methane, can not only improve the ecological environment, but also national energy security and the supplement energy are supplied
Significance should be all had.The development and application of China's biogas energy experienced family mode, middle-size and small-size biogas project and large-scale natural pond
The developing stage of gas engineering achieves good industrial application effect in south China.However, on the cold ground of northern China
Area, various Gas application technologies are caused anaerobic fermentation system fluctuation of service by low temperature effect, and factor of created gase is low, greatly constrains
It is promoted and application.
Extremely frigid zones marsh gas fermenting system is difficult to stable operation, and basic reason is that low temperature or temperature oscillation lead to biogas fermentation
The reduction of microbial metabolism ability, especially anaerobic ferment devices still rely upon traditional project experience design and operation, and structure is simple, manages
It is extensive, fail to provide suitable anaerobic digestion microenvironment.In order to overcome the problems referred above, a series of heat-preservation fermentations are developed in recent years
Tank, the auxiliary technical measures such as temperature raising device and a variety of thermophilic anaerobic in low temperature bacterium, biogas fermentation accelerant, but there are still biogas works
The problem of can not ensureing the biogas yield of efficient stable on journey winter operation and process control.
Summary of the invention
The purpose of the invention is to provide a kind of to solve that biogas yield is low under above-mentioned low-temperature condition and yield is unstable
The intelligent control diphasic anaerobic biomembrane marsh gas fermenting system and technique of problem, it is reasonable in design, easy to operate, based on biology
Phase detachment technique accurately controls the operating parameters such as system charging and discharging organic loading, temperature, mechanical stirring and biogas slurry reflux duty,
Realize the preparation of organic waste efficient cryogenic biogas.
The technical scheme is that
A kind of intelligent control diphasic anaerobic biomembrane marsh gas fermenting system, including hydrolysis acidification phase installation for fermenting, methane phase
Phase installation for fermenting and PLC intelligent controller, it is characterised in that: the hydrolysis acidification phase installation for fermenting and methanogenic phase installation for fermenting
Between setting acidification material storing equipment for separating liquid from solid, the acidification material storing equipment for separating liquid from solid lower part equipped with acidifying solution into
Material mouth, top are equipped with acidifying solution discharge port, and bottom is equipped with residue discharge port, and the acidifying solution feed inlet mutually ferments with hydrolysis acidification
Between the discharge port of device be equipped with connecting line and on the connecting line be equipped with acidifying solution feed pump, the residue discharge port with
It is equipped with connecting line between the feed inlet of hydrolysis acidification phase installation for fermenting and is equipped with residue reflux pump on the connecting line, it is described
It is equipped with connecting line between acidifying solution discharge port and the feed inlet of methanogenic phase installation for fermenting and is equipped on the connecting line and produces
Methane phase feed pump, the hydrolysis acidification phase installation for fermenting, acidification material storing equipment for separating liquid from solid and methanogenic phase fermentation dress
Top set portion is equipped with gas outlet, and the gas outlet is connect using pipeline with air collector, and the air collector separately connects gas flowmeter.
Above-mentioned intelligent control diphasic anaerobic biomembrane marsh gas fermenting system, the hydrolysis acidification phase installation for fermenting, acidification
The volume ratio of material storing equipment for separating liquid from solid and methanogenic phase installation for fermenting is 2-4:1:1.
Above-mentioned intelligent control diphasic anaerobic biomembrane marsh gas fermenting system, the hydrolysis acidification phase installation for fermenting is using double
Layer spiral continuously stirs autoclave device, and bottom is equipped with feed inlet and the feed inlet uses three-way magnetic valve, removes and hydrolysis acidification
Outside the port that phase installation for fermenting is connected directly, organic waste feed pump is connected using pipeline on the outside of one of charging port,
It is connected on the outside of another charging port with connecting line where the residue reflux pump, the PLC intelligent controller passes through control
Organic waste feed pump and residue reflux pump adjustment feed loading and sediment feed back load, the hydrolysis acidification phase installation for fermenting
Top be equipped with discharge port, setting double-layer spiral electric mixer, thermocouple heating inside the hydrolysis acidification phase installation for fermenting
Device, temperature sensor, pH meter and oxidation-reduction potentiometer.
Above-mentioned intelligent control diphasic anaerobic biomembrane marsh gas fermenting system, the high ratio of the diameter of the methanogenic phase installation for fermenting
For 1:5-8, bottom is equipped with feed inlet and the feed inlet uses three-way magnetic valve, except what is be connected directly with methanogenic phase installation for fermenting
Outside port, one of port is connected as charging port with connecting line where methanogenic phase feed pump, another is used as
Expect that port connects biogas slurry circulating pump using pipeline, the top of the methanogenic phase installation for fermenting is equipped with biogas slurry refluxing opening, the natural pond
Stream disperser is connected back on the inside of liquid refluxing opening, outside is connected with the outlet line of the biogas slurry circulating pump, the PLC intelligent control
Device adjusts feed loading and biogas slurry regurgitant volume, the methanogenic phase fermentation by control methanogenic phase feed pump and biogas slurry circulating pump
Corresponding reflux disperser lower position is equipped with detachable carrier bearing device inside device, in the methanogenic phase installation for fermenting
It is additionally provided with pH meter and oxidation-reduction potentiometer.
Above-mentioned intelligent control diphasic anaerobic biomembrane marsh gas fermenting system, the reflux disperser be it is inverted funnel-shaped,
Bottom surface is uniformly arranged porous round biogas slurry spray port, and diameter is the 3/5-4/5 of methanogenic phase installation for fermenting diameter.
Above-mentioned intelligent control diphasic anaerobic biomembrane marsh gas fermenting system, the detachable carrier bearing device are located at
At 2/3 at the top of methanogenic phase installation for fermenting, the carrier height of support is the 1/5-1/3 of methanogenic phase installation for fermenting height,
The upper and lower bottom surface of the detachable carrier bearing device is uniformly arranged multiple through-holes, for fixing soft filler.
Above-mentioned intelligent control diphasic anaerobic biomembrane marsh gas fermenting system, the bilayer of the hydrolysis acidification phase installation for fermenting
Upper and lower two layers of agitating paddle of spiral electric blender is located at away from 1/3 and 2/3 at the top of hydrolysis acidification phase installation for fermenting, described
Agitating paddle is made of the parallel grizzly bar in equal gaps, and the stirring frequency is automatically controlled by PLC intelligent controller.
Above-mentioned intelligent control diphasic anaerobic biomembrane marsh gas fermenting system, the outside of the hydrolysis acidification phase installation for fermenting
Equipped with polyurethane insulation coating, with a thickness of 2-5cm.
Above-mentioned intelligent control diphasic anaerobic biomembrane marsh gas fermenting system, the hydrolysis acidification phase installation for fermenting and production first
Alkane phase installation for fermenting is respectively equipped with the different sample tap of multiple height.
A kind of intelligent control diphasic anaerobic biomembrane marsh gas fermentation process, which comprises the steps of:
Step 1, first by the mixed grains of sand in single debirs fermentation raw material or a variety of debirs mixed fermentation raw materials
It separates, then is mixed with smashed stalk, the total solid concentration (TS%) for finally adjusting mixed material is 6%-12%, carbon
Nitrogen ratio (C/N) is 20-30:1；Into hydrolysis acidification phase installation for fermenting, investment acidification phase inoculum, the acidification phase inoculum are
Mesophilic digestion biogas digested liquor of biogas generating pit, access amount are the 30% of hydrolysis acidification phase installation for fermenting total measurement (volume), are then pumped into mixed material
Into hydrolysis acidification phase installation for fermenting to setting capacity；The initial pH value of mixed material is adjusted in 7.0- by acid-base neutralization principle
Between 7.5, and heats mixed material to starting after 30-35 DEG C and continuously ferment operational mode, the installation for fermenting timing of hydrolysis acidification phase
Quantitative discharge acidification material fills into the fresh mix material with discharges material equivalent to storing equipment for separating liquid from solid, herein
In the process, feed loading 0.5-1.0kgVS/m3D, residence time of material is 35-40 days, using the every 3h of blender with 120-
150rpm/min stirs 8-10min；
Step 2, when in hydrolysis acidification phase installation for fermenting mixed material pH value be down to 6.5 hereinafter, passing through sampling and measuring simultaneously
When short chain volatile fatty acid is using acetic acid and butyric acid as primary end liquid phase tunning, pH value is fed back by PLC intelligent controller
Variation improves feed loading to 2.0-2.5kgVS/m3D, residence time of material foreshorten to 25-30 days, and the every 3h of blender is with 120-
150rpm/min stirs 8-10min；
The acidifying solution isolated is pumped by step 3, the storage equipment for separating liquid from solid for being acidified material in a manner of continuous feed
Methanogenic phase installation for fermenting, feed loading 1.5-2.5kgVS/m3D, methane phase inoculum are derived from municipal sewage plant's anaerobism
Anaerobic grain sludge in reactor keeps fermentation temperature in methanogenic phase installation for fermenting to be not less than 25 DEG C, residence time of material
25-30 days, material reflux ratio was 30%~50%, hydrolysis acidification phase installation for fermenting, the storage equipment for separating liquid from solid for being acidified material
The biogas generated with methanogenic phase installation for fermenting is collected in air collector respectively.
The beneficial effects of the present invention are: present system is reasonable in design, technological operation is simple, provides hydrolysis respectively and produces
Acetic bacterial and methanogen are respectively suitable for the ecological condition of metabolism, enhance methane phase efficiency；It is suitable to all kinds of organic solid wastes
Should be able to power it is strong, effectively solve material hydrolysis acid process crust, and the accumulation of volatile acid or ammonia be effectively relieved to methane process
Inhibiting effect, charging and discharging load can be accurately controlled by PLC intelligent controller, biogas slurry regurgitant volume, hydrolysis produce sour phase temperature with
The technological parameters such as stirring intensity significantly improve methanogenic phase low-temperature methane transformation efficiency and operation stability, realize organic waste
The preparation of gurry efficient cryogenic biogas.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of marsh gas fermenting system of the invention.
Fig. 2 is the present invention using cow dung as the variation signal of the volatile fatty acid of the hydrolysis acidification phase installation for fermenting of fermentation substrate
Figure.
In figure: 1. hydrolysis acidification phase installation for fermentings, 2. feed inlets, 3.pH meter, 4. oxidation-reduction potentiometers, 5. double-layer spirals
Electric mixer, 6. agitating paddles, 7. thermocouple heaters, 8. machine waste feed pumps, 9. sample taps, 10. discharge ports, 11. go out
Port, 12. air collectors, 13. gas flowmeters, 14.PLC intelligent controller, 15. residue reflux pumps, 16. acidifying solution feed pumps,
17. storing equipment for separating liquid from solid, 18. acidifying solution feed inlets, 19. residue discharge ports, 20. gas outlets, 21. air collectors, 22. gases
Flowmeter, 23. acidifying solution discharge ports, 24. methanogenic phase feed pumps, 25. feed inlets, 26.pH meter, 27. oxidation-reduction potentiometers,
28. methanogenic phase installation for fermenting, 29. gas outlets, 30. biogas slurry refluxing openings, 31. reflux dispersers, 32. carrier bearing devices, 33.
Sample tap, 34. biogas slurry circulating pumps, 35. air collectors, 36. gas flowmeters.
Specific embodiment
Embodiment 1
As shown in Figure 1, the intelligent control diphasic anaerobic biomembrane marsh gas fermenting system, by hydrolysis acidification phase installation for fermenting 1,
Methanogenic phase installation for fermenting 28, the acidulants being connected between hydrolysis acidification phase installation for fermenting 1 and methanogenic phase installation for fermenting 28
Material storage equipment for separating liquid from solid 17 and PLC intelligent controller 14 form.The hydrolysis acidification phase installation for fermenting 1, acidification material
The volume ratio for storing equipment for separating liquid from solid 17 and methanogenic phase installation for fermenting 28 is 4:1:1.
Wherein, 17 lower part of acidification material storing equipment for separating liquid from solid is equipped with acidifying solution feed inlet 18, and top is equipped with acid
Change liquid discharge port 23, top is equipped with gas outlet 20, and bottom is equipped with residue discharge port 19.The acidifying solution feed inlet 18 and hydrolysis acid
Change and is equipped with connecting line between the discharge port 10 of phase installation for fermenting 1 and is equipped with acidifying solution feed pump 16, institute on the connecting line
It states and is equipped with connecting line between residue discharge port 19 and the feed inlet 2 of hydrolysis acidification phase installation for fermenting 1 and on the connecting line
Equipped with residue reflux pump 15, connection is equipped between the acidifying solution discharge port 23 and the feed inlet 25 of methanogenic phase installation for fermenting 28
Pipeline is simultaneously equipped with methanogenic phase feed pump 24 on the connecting line.The gas outlet 20 is connect using pipeline with air collector 21,
The air collector 21 separately connects gas flowmeter 22.
The hydrolysis acidification phase installation for fermenting 1 continuously stirs autoclave device using double-layer spiral, and bottom is equipped with feed inlet 2
And the feed inlet 2 use three-way magnetic valve, in addition to the port being connected directly with hydrolysis acidification phase installation for fermenting 1, one of them into
Expect to connect organic waste feed pump 8, another charging port outside and the residue reflux pump 15 using pipeline on the outside of port
Place connecting line is connected, and the PLC intelligent controller 14 is adjusted by control organic waste feed pump 8 and residue reflux pump 15
Whole feed loading and sediment feed back load.The top of the hydrolysis acidification phase installation for fermenting 1 is equipped with discharge port 10, the hydrolysis acid
Change and double-layer spiral electric mixer 5, thermocouple heater 7, temperature sensor, pH meter 3 and oxidation are set inside phase installation for fermenting 1
Reduction potential meter 4, top is equipped with gas outlet 11 and gas outlet 11 is using pipeline connection air collector 12, and air collector 12 is separately connected with gas
Flowmeter body 13.Upper and lower two layers of agitating paddle 6 of the double-layer spiral electric mixer 5 is located at away from hydrolysis acidification phase installation for fermenting 1
At the 1/3 of top and 2/3, the agitating paddle 6 is made of the parallel grizzly bar in equal gaps, the stirring frequency by PLC intelligent controller 14 from
Dynamic control.The outside of the hydrolysis acidification phase installation for fermenting 1 is equipped with polyurethane insulation coating, with a thickness of 2cm.
The diameter height of the methanogenic phase installation for fermenting 28 compares for 1:5, and bottom is equipped with feed inlet 25 and the feed inlet 25 uses
Three-way magnetic valve, in addition to the port being connected directly with methanogenic phase installation for fermenting 28, one of port as charging port with
24 place connecting line of methanogenic phase feed pump is connected, another connects biogas slurry circulating pump 34 using pipeline as discharge end,
The top of the methanogenic phase installation for fermenting 28 is equipped with biogas slurry refluxing opening 30, and flow point is connected back on the inside of the biogas slurry refluxing opening 30 and is dissipated
Device 31, the reflux disperser 31 be it is inverted funnel-shaped, bottom surface is uniformly arranged porous round biogas slurry spray port, and diameter is methane phase
The 3/5 of 28 diameter of phase installation for fermenting.30 outside of biogas slurry refluxing opening is connected with the outlet line of the biogas slurry circulating pump 34, institute
It states PLC intelligent controller 14 and feed loading and biogas slurry reflux is adjusted by control methanogenic phase feed pump 24 and biogas slurry circulating pump 34
Amount.Corresponding reflux 31 lower position of disperser is equipped with detachable carrier bearing device inside the methanogenic phase installation for fermenting 28
32, the detachable carrier bearing device 32 is located at 2/3 away from 28 top of methanogenic phase installation for fermenting, and the carrier of support is high
Degree is the 1/5 of 28 height of methanogenic phase installation for fermenting, and the upper and lower bottom surface of the detachable carrier bearing device 32 is uniformly arranged
Multiple through-holes, for fixing soft filler.Gas outlet 29 and 29 benefit of gas outlet are equipped at the top of the methanogenic phase installation for fermenting 28
Air collector 35 is connected with pipeline, air collector 35 is separately connected with gas flowmeter 36, separately sets in the methanogenic phase installation for fermenting 28
There are pH meter 26 and oxidation-reduction potentiometer 27.The hydrolysis acidification phase installation for fermenting 1 and methanogenic phase installation for fermenting 28 are set respectively
There is the sample tap 9,33 that multiple height are different.
Using the intelligent control diphasic anaerobic biomembrane marsh gas fermentation process of above system, include the following steps:
The grains of sand mixed in cow dung are first separated, then mixed with smashed stalk by step 1, finally plus water adjustment
The total solid concentration (TS%) of mixed material is 6%, carbon-nitrogen ratio (C/N) is 20:1.It is put into hydrolysis acidification phase installation for fermenting 1
It is acidified phase inoculum, the mesophilic digestion biogas digested liquor of biogas generating pit that the acidification phase inoculum is 35 DEG C, access amount is that hydrolysis acidification is mutually sent out
Then mixed material is pumped into hydrolysis acidification by organic waste feed pump 8 and mutually fermented dress by the 30% of ferment device total measurement (volume)
It sets in 1 to setting capacity.The initial pH value of mixed material is adjusted to 7.0 by acid-base neutralization principle, and heats mixed material extremely
Starting is continuously fermented operational mode after 35 DEG C, and hydrolysis acidification phase installation for fermenting 1 discharge at regular time and quantity is acidified material to storing solid-liquid
Separator 17, while filling into and the cow dung of discharges material equivalent and smashed stalk mixed material, in the process, charging
Load is 0.5kgVS/m3D, residence time of material are 40 days, stir 8min using the every 3h of blender with 120rpm/min.
Step 2, when in hydrolysis acidification phase installation for fermenting 1 mixed material pH value be down to 6.5 hereinafter, simultaneously by sample tap 9
When short chain volatile fatty acid is measured by sampling using acetic acid and butyric acid as primary end liquid phase tunning (referring to fig. 2), by PLC intelligence
It can control device 14 and feed back pH value variation, improve feed loading to 2.0kgVS/m3D, residence time of material foreshorten to 30 days, stirring
The every 3h of device stirs 8min with 120rpm/min.
Step 3, the storage equipment for separating liquid from solid 17 for being acidified material lead to the acidifying solution isolated in a manner of continuous feed
It crosses methanogenic phase feed pump 24 and is pumped into methanogenic phase installation for fermenting 28, feed loading 1.5kgVS/m3D, methane phase inoculum take
Anaerobic grain sludge from municipal sewage plant's anaerobic reactor, keep methanogenic phase installation for fermenting 28 in fermentation temperature not
Lower than 25 DEG C, residence time of material 25 days, material reflux ratio was 30%, hydrolysis acidification phase installation for fermenting 1, the storage for being acidified material
The biogas that equipment for separating liquid from solid 17 and methanogenic phase installation for fermenting 28 generate is collected in corresponding air collector respectively and passes through gas
Flowmeter metering.
Embodiment 2
The intelligent control diphasic anaerobic biomembrane marsh gas fermenting system, hydrolysis acidification phase installation for fermenting 1, acidification material storing
The volume ratio of equipment for separating liquid from solid 17 and methanogenic phase installation for fermenting 28 is 4:1:1.The diameter for stating methanogenic phase installation for fermenting 28 is high
It is filled than for 1:8, the detachable carrier bearing device 32 in the methanogenic phase installation for fermenting 28 is located to ferment away from methanogenic phase
At set 28 tops 2/3, the carrier height of support is the 1/3 of 28 height of methanogenic phase installation for fermenting.Other are the same as embodiment 1.
Using the intelligent control diphasic anaerobic biomembrane marsh gas fermentation process of above system, include the following steps:
The grains of sand mixed in pig manure and sewage sludge are first separated, then mixed with smashed stalk by step 1, most
Afterwards plus the total solid concentration (TS%) of water adjustment mixed material is 10%, carbon-nitrogen ratio (C/N) is 25:1.It mutually ferments to hydrolysis acidification
Investment acidification phase inoculum in device 1, the mesophilic digestion biogas digested liquor of biogas generating pit that the acidification phase inoculum is 30 DEG C, access amount is water
Then mixed material is pumped into hydrolysis acid by organic waste feed pump 8 by the 30% of solution acidification 1 total measurement (volume) of phase installation for fermenting
Change in phase installation for fermenting 1 to setting capacity.The initial pH value of mixed material is adjusted to 7.2 by acid-base neutralization principle, and is heated
Mixed material to starting after 30 DEG C is continuously fermented operational mode, and hydrolysis acidification phase installation for fermenting 1 discharge at regular time and quantity is acidified material
To storage equipment for separating liquid from solid 17, while filling into and being mixed with the pig manure of discharges material equivalent, sewage sludge and smashed stalk
Material, in the process, feed loading 0.8kgVS/m3D, residence time of material be 35 days, using the every 3h of blender with
140rpm/min stirs 9min.Part sediment is pumped into hydrolysis acidification phase installation for fermenting 1 by residue reflux pump 15.
Step 2, when in hydrolysis acidification phase installation for fermenting 1 mixed material pH value be down to 6.5 hereinafter, simultaneously by sample tap 9
When short chain volatile fatty acid is measured by sampling using acetic acid and butyric acid as primary end liquid phase tunning, by PLC intelligent controller
14 feedback pH value variations, improve feed loading to 2.3kgVS/m3D, residence time of material foreshorten to 25 days, the every 3h of blender with
140rpm/min stirs 9min.
Step 3, the storage equipment for separating liquid from solid 17 for being acidified material lead to the acidifying solution isolated in a manner of continuous feed
It crosses methanogenic phase feed pump 24 and is pumped into methanogenic phase installation for fermenting 28, feed loading 2kgVS/m3D, methane phase inoculum are derived from
Anaerobic grain sludge in municipal sewage plant's anaerobic reactor keeps fermentation temperature in methanogenic phase installation for fermenting 28 not low
In 25 DEG C, residence time of material 28 days, material reflux ratio is 40%, and hydrolysis acidification phase installation for fermenting 1, the storage for being acidified material are solid
The biogas that liquid separating apparatus 17 and methanogenic phase installation for fermenting 28 generate is collected in corresponding air collector and respectively by gas stream
Meter metering.
Embodiment 3
The intelligent control diphasic anaerobic biomembrane marsh gas fermenting system, hydrolysis acidification phase installation for fermenting 1, acidification material storing
The volume ratio of equipment for separating liquid from solid 17 and methanogenic phase installation for fermenting 28 is 3:1:1.The diameter of the methanogenic phase installation for fermenting 28
For height than being 1:6, the diameter of reflux disperser 31 is the 4/5 of 28 diameter of methanogenic phase installation for fermenting, detachable carrier support dress
It sets 32 to be located at 2/3 away from 28 top of methanogenic phase installation for fermenting, the carrier height of support is that methanogenic phase installation for fermenting 28 is high
The 1/4 of degree.Other are the same as embodiment 1.
Using the intelligent control diphasic anaerobic biomembrane marsh gas fermentation process of above system, include the following steps:
The grains of sand mixed in chicken manure are first separated, then mixed with smashed stalk by step 1, finally adjustment mixing
The total solid concentration (TS%) of material is 12%, carbon-nitrogen ratio (C/N) is 30:1.Acid is put into hydrolysis acidification phase installation for fermenting 1
Change phase inoculum, the acidification phase inoculum is mesophilic digestion biogas digested liquor of biogas generating pit, and access amount is that hydrolysis acidification phase installation for fermenting 1 is total
Then mixed material is pumped into hydrolysis acidification phase installation for fermenting 1 to setting capacity by the 30% of volume.Pass through acid-base neutralization original
The initial pH value of reason adjustment mixed material heats mixed material to starting after 33 DEG C and continuously ferments operational mode to 7.5, hydrolysis
Acidification phase installation for fermenting 1 discharge acidification material to storing equipment for separating liquid from solid 17, while filling into discharges material etc. at regular time and quantity
The fresh mix material of amount, in the process, feed loading 1.0kgVS/m3D, residence time of material are 38 days, utilize stirring
The every 3h of device stirs 10min with 150rpm/min.
Step 2, when in hydrolysis acidification phase installation for fermenting 1 mixed material pH value be down to 6.5 hereinafter, passing through sampling and measuring simultaneously
When short chain volatile fatty acid is using acetic acid and butyric acid as primary end liquid phase tunning, pH is fed back by PLC intelligent controller 14
Value variation improves feed loading to 2.5kgVS/m3D, residence time of material foreshorten to 28 days, and the every 3h of blender is with 150rpm/
Min stirs 10min.
Step 3, the storage equipment for separating liquid from solid 17 for being acidified material pump the acidifying solution isolated in a manner of continuous feed
Enter methanogenic phase installation for fermenting 28, feed loading 2.5kgVS/m3D, methane phase inoculum are derived from municipal sewage plant's anaerobism
Anaerobic grain sludge in reactor keeps fermentation temperature in methanogenic phase installation for fermenting 28 to be not less than 25 DEG C, when material stop
Between 30 days, material reflux ratio be 50%, hydrolysis acidification phase installation for fermenting 1, be acidified material storage equipment for separating liquid from solid 17 and produce
The biogas that methane phase installation for fermenting 28 generates is collected in corresponding air collector respectively and is measured by gas flowmeter.
Claims (10)
1. a kind of intelligent control diphasic anaerobic biomembrane marsh gas fermenting system, including hydrolysis acidification phase installation for fermenting, methanogenic phase
Installation for fermenting and PLC intelligent controller, it is characterised in that: the hydrolysis acidification phase installation for fermenting and methanogenic phase installation for fermenting it
Between setting acidification material storing equipment for separating liquid from solid, the acidification material storing equipment for separating liquid from solid lower part equipped with acidifying solution charging
Mouthful, top is equipped with acidifying solution discharge port, and bottom is equipped with residue discharge port, and the acidifying solution feed inlet mutually ferments dress with hydrolysis acidification
It is equipped with connecting line between the discharge port set and is equipped with acidifying solution feed pump, the residue discharge port and water on the connecting line
Connecting line is equipped between the feed inlet of solution acidification phase installation for fermenting and residue reflux pump, the acid are equipped on the connecting line
Change to be equipped with connecting line between liquid discharge port and the feed inlet of methanogenic phase installation for fermenting and be equipped on the connecting line and produces first
Alkane phase feed pump, the hydrolysis acidification phase installation for fermenting, acidification material storing equipment for separating liquid from solid and methanogenic phase installation for fermenting
Top is equipped with gas outlet, and the gas outlet is connect using pipeline with air collector, and the air collector separately connects gas flowmeter；Institute
Methanogenic phase installation for fermenting bottom is stated equipped with feed inlet and the feed inlet is using three-way magnetic valve, is removed and methanogenic phase installation for fermenting
Outside the port being connected directly, one of port is connected as charging port with connecting line where methanogenic phase feed pump, separately
One is used as discharge end to connect biogas slurry circulating pump using pipeline, and the top of the methanogenic phase installation for fermenting is flowed back equipped with biogas slurry
Mouthful, stream disperser is connected back on the inside of the biogas slurry refluxing opening, outside is connected with the outlet line of the biogas slurry circulating pump, described
PLC intelligent controller adjusts feed loading and biogas slurry regurgitant volume by control methanogenic phase feed pump and biogas slurry circulating pump, described
Corresponding reflux disperser lower position is equipped with detachable carrier bearing device inside methanogenic phase installation for fermenting.
2. intelligent control diphasic anaerobic biomembrane marsh gas fermenting system according to claim 1, it is characterised in that: the water
The volume ratio of solution acidification phase installation for fermenting, acidification material storing equipment for separating liquid from solid and methanogenic phase installation for fermenting is 2-4:1:1.
3. intelligent control diphasic anaerobic biomembrane marsh gas fermenting system according to claim 1, it is characterised in that: the water
Solution acidification phase installation for fermenting continuously stirs autoclave device using double-layer spiral, and bottom is equipped with feed inlet and the feed inlet uses three
Three-way electromagnetic valve utilizes pipeline in addition to the port being connected directly with hydrolysis acidification phase installation for fermenting on the outside of one of charging port
Organic waste feed pump is connected, is connected on the outside of another charging port with connecting line where the residue reflux pump, it is described
PLC intelligent controller adjusts feed loading and sediment feed back load by control organic waste feed pump and residue reflux pump,
The top of the hydrolysis acidification phase installation for fermenting is equipped with discharge port, and double-layer spiral is arranged inside the hydrolysis acidification phase installation for fermenting
Electric mixer, thermocouple heater, temperature sensor, pH meter and oxidation-reduction potentiometer.
4. intelligent control diphasic anaerobic biomembrane marsh gas fermenting system according to claim 1, it is characterised in that: the production
The diameter height of methane phase installation for fermenting compares for 1:5-8, and the PLC intelligent controller is followed by control methanogenic phase feed pump and biogas slurry
Ring pump adjustment feed loading and biogas slurry regurgitant volume, the corresponding reflux disperser lower position in methanogenic phase installation for fermenting inside are set
There is detachable carrier bearing device, is additionally provided with pH meter and oxidation-reduction potentiometer in the methanogenic phase installation for fermenting.
5. intelligent control diphasic anaerobic biomembrane marsh gas fermenting system according to claim 4, it is characterised in that: described time
Flow disperser be it is inverted funnel-shaped, bottom surface is uniformly arranged porous round biogas slurry spray port, and diameter is that methanogenic phase installation for fermenting is straight
The 3/5-4/5 of diameter.
6. intelligent control diphasic anaerobic biomembrane marsh gas fermenting system according to claim 4, it is characterised in that: it is described can
The carrier bearing device of fractionation is located at away from 2/3 at the top of methanogenic phase installation for fermenting, and the carrier height of support is methanogenic phase
The upper and lower bottom surface of the 1/5-1/3 of installation for fermenting height, the detachable carrier bearing device are uniformly arranged multiple through-holes, use
In the soft filler of fixation.
7. intelligent control diphasic anaerobic biomembrane marsh gas fermenting system according to claim 3, it is characterised in that: the water
Upper and lower two layers of agitating paddle of the double-layer spiral electric mixer of solution acidification phase installation for fermenting is located at away from hydrolysis acidification phase installation for fermenting
At the 1/3 of top and 2/3, the agitating paddle is made of the parallel grizzly bar in equal gaps, and the stirring frequency is controlled automatically by PLC intelligent controller
System.
8. intelligent control diphasic anaerobic biomembrane marsh gas fermenting system according to claim 1, it is characterised in that: the water
The outside of solution acidification phase installation for fermenting is equipped with polyurethane insulation coating, with a thickness of 2-5cm.
9. intelligent control diphasic anaerobic biomembrane marsh gas fermenting system according to claim 1, it is characterised in that: the water
Solution acidification phase installation for fermenting is respectively equipped with the different sample tap of multiple height with methanogenic phase installation for fermenting.
10. a kind of marsh gas fermentation process of intelligent control diphasic anaerobic biomembrane marsh gas fermenting system as described in claim 1,
It is characterized by comprising the following steps:
Step 1, first by the grains of sand mixed in single debirs fermentation raw material or a variety of debirs mixed fermentation raw materials separate
It goes out, then is mixed with smashed stalk, the total solid concentration (TS%) for finally adjusting mixed material is 6%-12%, carbon-nitrogen ratio
It (C/N) is 20-30:1；The investment acidification phase inoculum into hydrolysis acidification phase installation for fermenting, the acidification phase inoculum are medium temperature
Ferment biomass pool biogas slurry, access amount are the 30% of hydrolysis acidification phase installation for fermenting total measurement (volume), and mixed material is then pumped into water
To setting capacity in solution acidification phase installation for fermenting；The initial pH value of mixed material is adjusted in 7.0-7.5 by acid-base neutralization principle
Between, and heat mixed material to starting after 30-35 DEG C and continuously ferment operational mode, hydrolysis acidification phase installation for fermenting is at regular time and quantity
Discharge acidification material fills into the fresh mix material with discharges material equivalent to storing equipment for separating liquid from solid, in this process
In, feed loading 0.5-1.0kgVS/m3d, residence time of material is 35-40 days, using the every 3h of blender with 120-
150rpm/min stirs 8-10min；
Step 2, when in hydrolysis acidification phase installation for fermenting mixed material pH value be down to 6.5 hereinafter, simultaneously by the way that short chain is measured by sampling
When volatile fatty acid is using acetic acid and butyric acid as primary end liquid phase tunning, changed by PLC intelligent controller feedback pH value,
Feed loading is improved to 2.0-2.5kgVS/m3d, residence time of material foreshortens to 25-30 days, and the every 3h of blender is with 120-
150rpm/min stirs 8-10min；
The acidifying solution isolated is pumped into production first by step 3, the storage equipment for separating liquid from solid for being acidified material in a manner of continuous feed
Alkane phase installation for fermenting, feed loading 1.5-2.5kgVS/m3d, methane phase inoculum are derived from municipal sewage plant's anaerobic reaction
Anaerobic grain sludge in device, keep methanogenic phase installation for fermenting in fermentation temperature be not less than 25 DEG C, the residence time 25-30 days,
Material reflux ratio is 30~50%, hydrolysis acidification phase installation for fermenting, the storage equipment for separating liquid from solid and methanogenic phase for being acidified material
The biogas that installation for fermenting generates is collected in air collector respectively.
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| CN107815405B (en) * | 2017-12-14 | 2023-07-14 | 黑龙江省能源环境研究院 | Device and method for producing methane through two-phase anaerobic fermentation of yellow-stored straws |
| CN110078331A (en) * | 2019-03-19 | 2019-08-02 | 广东广垦畜牧工程研究院有限公司 | A kind of method of piggery wastewater diphasic anaerobic fermentation biogas |
| CN110452816A (en) * | 2019-08-21 | 2019-11-15 | 上海理工大学 | A kind of method and device of agricultural crop straw waste effectively hydrolyzing fermentation |
| CN110643638B (en) * | 2019-09-25 | 2021-08-10 | 中国农业大学 | Straw treatment method and application thereof |
| CN111592974A (en) * | 2020-03-12 | 2020-08-28 | 嘉兴恒创环保科技有限公司 | Three-phase integrated plug flow type biogas fermentation system and fermentation method |
| CN113770157A (en) * | 2021-09-03 | 2021-12-10 | 杭州市环境集团有限公司 | Method for preparing sewage carbon source by using kitchen waste and feasibility testing method thereof |
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