CN206601310U - A kind of full-automatic Biochemical Methane Potential test system - Google Patents
A kind of full-automatic Biochemical Methane Potential test system Download PDFInfo
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- CN206601310U CN206601310U CN201720178681.XU CN201720178681U CN206601310U CN 206601310 U CN206601310 U CN 206601310U CN 201720178681 U CN201720178681 U CN 201720178681U CN 206601310 U CN206601310 U CN 206601310U
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Abstract
The utility model provides a kind of full-automatic Biochemical Methane Potential test system, including fermentation reaction unit, air processing unit and gas measurement unit, fermentation reaction unit includes fermentation tank and temperature-controlled box, fermentation tank is placed in temperature-controlled box, air processing unit includes gas cleaning plant and gas drier, fermentation tank gas outlet is connected with gas cleaning plant air inlet, gas cleaning plant gas outlet is connected with gas drier air inlet, gas drier gas outlet connects gas measurement unit, gas measurement unit includes measurement pipe and microcomputer, measurement pipe bottom inner portion is provided with cut, the gas outlet side wall of measurement pipe is provided with bubble metrological service, bubble metrological service electrically connects with microcomputer.The full-automatic Biochemical Methane Potential test system automaticity is high, can automatically control fermentation reaction condition and automatic measurement gas flow, simple to operate, and multiple samples can be handled simultaneously, and testing efficiency is high；And the test system uses modularized design, it is easy to change part, maintenance cost is low.
Description
Technical field
The utility model belongs to Biomass Energy Technology field, and in particular to a kind of full-automatic Biochemical Methane Potential test system, fits
The potentiality of methane are produced under microbiological anaerobic fermentation for evaluating different kind organism matter material.
Background technology
The development of human society is with the progressive too busy to get away energy, and the fossil energy for playing main flow at present is faced with increasingly depleted
Condition, the other types of energy more or less there is also certain problem.Such as there is higher security risk, the sun in nuclear energy
There is territory restriction in the problem of having utilization rate and not high popularity rate, wind energy, water energy and geothermal energy.
Biomass energy is the energy that a class has application value very much, and as a kind of energy of wide material sources, people can pass through
Various biomass materials are carried out processing to obtain the energy.Wherein, it is a kind of main flow by microbiological anaerobic fermentation methane phase
Mode.For the material wide material sources for the methane phase that ferments, such as agricultural stalk, kitchen garbage, fowl and animal excrement, organic wastewater
Deng.Itself value of these materials is relatively low, and some also pollute the environment.Energy can be both obtained by way of biofermentation
Source, can mitigate environmental pollution again, be to kill two birds with one stone.
Due to the material wide material sources for biofermentation, property is different, and even same major class material also has many thin
Point, such as agricultural stalk is divided into wheat, paddy rice, corn etc., and fowl and animal excrement can also be divided into pig manure, chicken manure etc..Along with biology
Fermentation condition such as temperature, pH value, carbon-nitrogen ratio, nutrients, input mode etc. can all have a great impact to fermentation efficiency.Therefore,
People generally need to do the fermentation methane phase situation of all kinds of materials at different conditions high-volume before mega project engineering
Lab scale, that is, it should be understood that the Methane production potential of material.Material Methane production potential refers to unit organic materials in anaerobic condition
Lower fermentation produces the quantity of methane gas.
At present, biomass energy research is made it is preferable to European countries such as Denmark, Germany etc. with application, nonetheless,
The basic data of material Methane production potential still compares shortage.Therefore, it is badly in need of substantial amounts of pilot plant test and obtains Various types of data, from
And large database concept is set up, efficiency and its process stability, the scale of biogas engineering and technological design, life to understanding biogas fermentation
Production optimisation strategy and biogas engineering Profit Assessment etc. all have great importance.
Biomethanation potentiality are tested according to different demands, and experimental period is short then three or five days, long then one or two months, and every batch
Secondary test Duplicate Samples are more.Most researchers use manually-operated mode now, periodically as measured daily by drainage
The volume data of methane is once produced, workload is cumbersome, and there is certain error in dipping.In addition, the reaction bulb of designed, designed
The problem of air-tightness sometimes has certain, and be difficult to accomplish mechanical agitation.These realistic problems, seriously reduce biomass
The research progress of Methane production potential.
Utility model content
The purpose of this utility model is to overcome existing artificial operation Biochemical Methane Potential test job amount cumbersome, and is existed necessarily
The problem of error in dipping.
Therefore, the utility model provides a kind of full-automatic Biochemical Methane Potential test system, including fermentation reaction unit, gas
Processing unit and gas measurement unit, the fermentation reaction unit include fermentation tank and temperature-controlled box, and the fermentation tank is placed in temperature control
In case, the air processing unit includes gas cleaning plant and gas drier, and the fermentation tank gas outlet and gas are net
Air inlet connection is put in makeup, and the gas cleaning plant gas outlet is connected with gas drier air inlet, and the gas is dried
Device gas outlet connects gas measurement unit, and the gas measurement unit includes containing inside measurement pipe and microcomputer, the measurement pipe
There is standard liquid, the measurement pipe bottom inner portion is provided with cut, and the gas outlet side wall of the measurement pipe is measured provided with bubble
Mechanism, the bubble metrological service electrically connects with microcomputer.
Further, the fermentation tank includes tank body and the rubber stopper being sealingly disposed in tank body opening, the tank body bottom
Portion is provided with inlet, and tank body top is provided with liquid outlet, and the inlet and liquid outlet are connected with flexible pipe by threaded cap with holes,
The rubber stopper is provided with least two airway tubes and a straight tube through rubber stopper upper and lower ends, the straight tube bottom connection
Flexible seal pipe, the flexible sealing bottom of the tube is embedded with sealing-plug, and flexible sealing pipe is provided with thorn, and the flexibility is close
Tube sealing Upper vertical, bottom are provided with support base provided with turning, the tank body upper end is tilted, and the support base is provided with direct current
Metallic rod is connected with machine, the motor, the metallic rod is through straight tube and stretches into inside flexible sealing pipe.
Further, thermometer and pH meter are provided with the tank body of the fermentation tank.
Further, gas buffer bottle is provided with the gas circuit between the fermentation tank and gas cleaning plant.
Further, the gas cleaning plant is included in alkali liquor absorption bottle and acid solution absorption bottle, the alkali liquor absorption bottle
It is loaded with aqueous slkali, acid solution absorption bottle and is loaded with acid solution, air inlet is equipped with the alkali liquor absorption bottle and acid solution absorption bottle
Pipe and escape pipe, the air inlet bottom of the tube are located in alkali liquor absorption bottle and acid solution absorption bottle below liquid level, and outlet bottom of the tube is located at
In alkali liquor absorption bottle and acid solution absorption bottle more than liquid level.
Further, the gas drier includes being filled with absorbent cotton and drying inside drying tube, the drying tube
Agent.
Further, the bubble metrological service includes the optical pulse generator and light pulse detector being oppositely arranged, institute
Light pulse detector is stated to electrically connect with microcomputer.
Further, the measurement pipe is U-shaped or L-type, and the cut is arranged on measurement pipe bottom level section, the mouth of cut
Footpath is gradually reduced along gas flow direction.
Further, be provided with pressure-temperature sensor at the gas outlet of the measurement pipe, the pressure-temperature sensor with
Microcomputer is electrically connected.
Further, the air inlet of the measurement pipe and the bore of gas outlet are respectively less than the caliber of measurement pipe.
Compared with prior art, the beneficial effects of the utility model：
(1) this full-automatic Biochemical Methane Potential test system that the utility model is provided collect that methane is standby, handle and test in
One, automaticity is high, can automatically control fermentation reaction condition and automatic measurement gas flow, simple to operate, user
Just, multiple samples can be handled simultaneously, and testing efficiency is high；And the test system uses modularized design, it is easy to change part, safeguard
Cost is low.
(2) this full-automatic Biochemical Methane Potential test system that the utility model is provided is produced by air processing unit to fermentation
Raw gas carries out gasmetry again after being handled, test result is accurate and precision is high.
(3) gas measurement unit for this full-automatic Biochemical Methane Potential test system that the utility model is provided passes through microcomputer
Automatically tested and store data, can be continuously long-running, measurement efficiency is high.
The utility model is described in further details below with reference to accompanying drawing.
Brief description of the drawings
Fig. 1 is the structural representation of the full-automatic Biochemical Methane Potential test system of the utility model；
Fig. 2 is the structural representation of fermentation tank in the utility model；
Fig. 3 is the structural representation of air processing unit in the utility model；
Fig. 4 is the structural representation of gas measurement unit in the utility model；
Fig. 5 is agricultural stalk methane phase test result figure；
Fig. 6 is fowl and animal excrement fermentation methane phase test result figure；
Fig. 7 is rubbish from cooking Methane production potential test result figure.
Description of reference numerals：1st, temperature-controlled box；2nd, fermentation tank；3rd, air processing unit；4th, gas cleaning plant；5th, gas is done
Dry device；6th, gas measurement unit；7th, measurement pipe；8th, microcomputer；9th, inlet；10th, tank body；11st, metallic rod；12nd, flexible sealing
Pipe；13rd, thermometer；14th, pH meter；15th, rubber stopper；16th, airway tube；17th, direct current generator；18th, support base；19th, straight tube；20th, go out
Liquid mouthful；21st, thorn；22nd, sealing-plug；23rd, surge flask；24th, air inlet pipe；25th, alkali liquor absorption bottle；26th, escape pipe；27th, acid solution
Absorption bottle；28th, drying tube；29th, air inlet；30th, gas outlet；31st, optical pulse generator；32nd, light pulse detector；33rd, cut；
34th, bubble；35th, pressure-temperature sensor.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The all other embodiment obtained, belongs to the scope of the utility model protection.
As shown in Figure 1 and Figure 4, a kind of full-automatic Biochemical Methane Potential test system, including fermentation reaction are present embodiments provided
Unit, air processing unit 3 and gas measurement unit 6, the fermentation reaction unit include fermentation tank 2 and temperature-controlled box 1, the hair
Fermentation tank 2 is placed in temperature-controlled box 1, and the air processing unit 3 includes gas cleaning plant 4 and gas drier 5, the fermentation
The gas outlet of tank 2 is connected with the air inlet of gas cleaning plant 4, the gas outlet of gas cleaning plant 4 and the air inlet of gas drier 5
Mouth connection, the gas outlet of gas drier 5 connects gas measurement unit 6, and the gas measurement unit 6 includes measurement pipe 7
With microcomputer 8, standard liquid is filled inside the measurement pipe 7, the bottom inner portion of measurement pipe 7 is provided with cut 33, the measurement pipe 7
The side wall of gas outlet 30 be provided with bubble metrological service, the bubble metrological service electrically connects with microcomputer 8.By thing to be tested
Material and microorganism fungus kind, which sequentially add, carries out fermentation reaction generation fermentation gas in fermentation tank 2, fermentation gas is through gas treatment list
Member 3 purification and be dried to obtain pure methane gas, methane gas is tested by gas measurement unit 6, methane gas
The Internal Standard Solution of measurement pipe 7 is compressed, bubble 34 is produced at cut 33, the quantity of bubble 34 is measured by steeping metrological service, and
Microcomputer 8 is transferred to store, so that material fermentation Methane production potential is obtained, the full-automatic Biochemical Methane Potential test system automaticity
Height, can automatically control fermentation reaction condition and automatic measurement gas flow, simple to operate, easy to use, can handle many simultaneously
Individual sample, testing efficiency is high；And the test system uses modularized design, it is easy to change part, maintenance cost is low.
The embodiment of refinement, as shown in Fig. 2 the fermentation tank 2 includes tank body 10 and is sealingly disposed in tank body 10 and is open
Interior rubber stopper 15, the bottom of tank body 10 is provided with inlet 9, and the top of tank body 10 is provided with liquid outlet 20, the inlet 9 and gone out
Liquid mouthful 20 is connected with flexible pipe by threaded cap with holes, when tightening threaded cap with holes, and the extruding of flexible pipe itself stress produces deformation
Sealing is formed, material can be pumped into toward the flexible pipe on inlet 9 by peristaltic pump, thing can be pumped out from the flexible pipe on liquid outlet 20
Material, so as to realize continuous sample introduction；The rubber stopper 15 is provided with least two airway tubes 16 through the upper and lower ends of rubber stopper 15
With a straight tube 19, one is used for air inlet in two airway tubes 16, and another is used for outlet, and the material of airway tube 16 is stainless steel
Pipe, is passed through inert gas such as nitrogen by airway tube before experiment and discharges the oxygen in fermentation tank 2, it is ensured that detesting in fermentation tank 2
The airway tube 16 of outlet is used to discharge the gas that fermentation is produced in oxygen environment, experimentation, and the bottom of straight tube 19 is connected with soft
Property seal pipe 12, flexible sealing pipe 12 can be directly socketed on straight tube 19, play close by the natural resiliency of flexible sealing pipe 12
Envelope is acted on, or is bound round flexible sealing pipe 12 on straight tube 19 by iron hoop, and the bottom of flexible sealing pipe 12 is embedded with sealing
Plug 22, flexible sealing pipe 12 is provided with thorn 21, and the Upper vertical of flexible sealing pipe 12, bottom are soft provided with turning is tilted
Property seal pipe 12 bottom have a certain angle inclination, flexible sealing pipe 12 is provided with thorn, and purpose is provided to improve stirring
Effect, the upper end of tank body 10 is provided with support base 18, and the support base 18 is provided with direct current generator 17, the direct current generator 17
Metallic rod 11 is connected with, the metallic rod 11 is through straight tube 19 and stretches into inside flexible sealing pipe 12.Direct current generator 17 drives gold
Category bar 11 and flexible sealing pipe 12 rotate, and serve the effect of stirring material.In addition, in order to be able to detect fermentation materials temperature and
Thermometer 13 and pH meter 14 are provided with pH value, the tank body 10 of the fermentation tank 2, so as to realize real-time inspection and control fermentation reaction
The purpose of condition.
As shown in figure 3, the gas cleaning plant 4 includes alkali liquor absorption bottle 25 and acid solution absorption bottle 27, the alkali lye is inhaled
Receive in bottle 25 and be loaded with aqueous slkali, the CO for absorbing microbial fermentation generation2、H2In the sour gas such as S, acid solution absorption bottle 27
Acid solution is loaded with, the NH for absorbing microbial fermentation generation3Deng alkaline gas, the alkali liquor absorption bottle 25 and acid solution absorb
Air inlet pipe 24 and escape pipe 26 are equipped with bottle 27, the bottom of air inlet pipe 24 is arranged on alkali liquor absorption bottle 25 and acid solution absorption bottle
In 27 below liquid level, the bottom of escape pipe 26 is arranged in alkali liquor absorption bottle 25 and acid solution absorption bottle 27 more than liquid level, is easy to gas
Fully absorbed by solution；The gas that microbial fermentation is produced can effectively ensure that the methane of follow-up test after gas cleaning plant 4
Without other gaseous impurities in gas, test effect is accurate；Certainly, when need not be to the sour gas and alkali that produce in fermentation tank 2
Property gas absorb when, aqueous slkali and acid solution can be all replaced by pure water.And disappear for the ease of observation aqueous slkali and acid solution
Consumption degree, the appropriate pH indicator that can be separately added into alkali liquor absorption bottle 25 and acid solution absorption bottle 27 preferably develops the color, and carries
Show periodic replacement aqueous slkali and acid solution.The gas drier 5 includes drying tube 28, and the inside of drying tube 28 is filled with
Absorbent cotton and drier, drier are used to the gas after the processing of gas cleaning plant 4 is dried, and the effect of absorbent cotton is anti-
Only drier is entrained by the flow of air.
And in order to prevent when fermentation tank 2 because microbial activities be in negative pressure when, alkali liquor absorption bottle 25 in aqueous slkali directly enter
Enter fermentation tank 2, so that violent change pH, influence experiment is normally carried out, between the fermentation tank 2 and gas cleaning plant 4
Gas circuit on set gas buffer bottle 23.
As shown in figure 4, the inside of the measurement pipe 7 fills standard liquid, the standard liquid is inertia oil, physical chemistry
Property is stable, and all kinds of gases are hardly picked up, and itself volatility very little；The measurement pipe 7 is U-shaped or L-type, the cut
33 are arranged on the bottom level of measurement pipe 7 section, and the bore of cut 33 is gradually reduced along gas flow direction, the bubble metrological service
Including the optical pulse generator 31 and light pulse detector 32 being oppositely arranged, the light pulse detector 32 is electrically connected with microcomputer 8.
When through air processing unit 3 handle after the measured pipe 7 of under test gas air inlet 29 after, the normal fluid in measurement pipe 7
To the side pressure contracting of gas outlet 30 of measurement pipe 7, it is compressed at cut 33, under test gas can form bubble 34, the gas at cut 33
The size of bubble 34 is determined by the size of cut 33, when the processing dimension for controlling cut 33, and during fixed standard liquid volume, gas
The size of bubble 34 is standard.When bubble 34 rises through the light path of optical pulse generator 31, light pulse detector 32 has
Respond and count, while transmitting a signal to microcomputer 8.The volume of under test gas is exactly the size and light pulse detector of bubble 34
The number of bubbles product of 32 meterings, the under test gas volume passed through in the unit interval is exactly the gas production rate in fermentation tank 2.It is described to survey
Pressure-temperature sensor 35 is provided with the gas outlet 30 of buret 7, the pressure-temperature sensor 35 is electrically connected with microcomputer 8, pressure
Temperature sensor 35 monitors the pressure and temperature at the gas outlet 30 of measurement pipe 7 and feeds back to microcomputer 8 in real time carries out the school of bubble 34
It is accurate.Additionally, it is preferred that, the air inlet 29 of the measurement pipe 7 and the bore of gas outlet 30 are respectively less than the caliber of measurement pipe 7, pass through
Caliber change can effectively improve the stable gas pressure of air inlet and outlet.
The full-automatic Biochemical Methane Potential test system of the utility model is used to different fermentations material below by specific embodiment
Carry out Methane production potential research.
(1) agricultural stalk methane phase is studied
Under 37 DEG C of anaerobic conditions, Biochemical Methane Potential testing research is carried out by raw material of banana stalk.To aerogenesis since fermentation
Automatic measurement and record are carried out, until aerogenesis is not further added by substantially, fermentation ends.As shown in figure 5, after testing 30 days, banana straw
Stalk methane production reaches 202.3 NmL/g.VS, shows banana stalk suitably as biogas fermentation material.
(2) fowl and animal excrement fermentation methane phase research
Using anaerobic fermentation have studied during pig manure, cow dung and chicken manure ferment 20 days at room temperature produce methane amount and
The rule of its material characteristic influence.As shown in fig. 6, under equal conditions pig manure, cow dung and chicken manure pass through the anaerobic fermentation of 20 days
Afterwards, total gas production descending order is followed successively by cow dung>Pig manure>Chicken manure, respectively 2527 mL, 1918 mL and 1132 mL.Pig
Excrement is easily acidified in anaerobic fermentation process, so as to cause gas production to decline, chicken manure ammonium nitrogen in anaerobic fermentation process contains
Amount is too high, so as to suppress aerogenesis.
(3) rubbish from cooking Methane production potential is tested
By by rubbish from cooking and blue-green algae mixed fermentation, reaching optimization fermentation substrate, optimal gas producing efficiency, such as Fig. 7 are obtained
It is shown, when mixed proportion 2:When 1, methane production reaches 118.6mL/g.
In summary, the utility model provide this full-automatic Biochemical Methane Potential test system collection methane it is standby, processing and
Test in one, automaticity is high, can automatically control fermentation reaction condition and automatic measurement gas flow, simple to operate,
It is easy to use, multiple samples can be handled simultaneously, and testing efficiency is high；And the test system uses modularized design, it is easy to replacing portion
Part, maintenance cost is low.
Exemplified as above is only for example, not constituting to protection domain of the present utility model to of the present utility model
Limitation, it is every to be belonged to the same or analogous design of the utility model within protection domain of the present utility model.
Claims (10)
1. a kind of full-automatic Biochemical Methane Potential test system, it is characterised in that：Including fermentation reaction unit, air processing unit (3)
With gas measurement unit (6), the fermentation reaction unit includes fermentation tank (2) and temperature-controlled box (1), and the fermentation tank (2) is placed in
In temperature-controlled box (1), the air processing unit (3) includes gas cleaning plant (4) and gas drier (5), the fermentation
Tank (2) gas outlet is connected with gas cleaning plant (4) air inlet, and gas cleaning plant (4) gas outlet is dried with gas and filled
Put the connection of (5) air inlet, gas drier (5) the gas outlet connection gas measurement unit (6), the gas measurement unit
(6) include filling standard liquid, measurement pipe (7) bottom inner portion inside measurement pipe (7) and microcomputer (8), the measurement pipe (7)
Provided with cut (33), gas outlet (30) side wall of the measurement pipe (7) is provided with bubble metrological service, the bubble dosing machine
Structure is electrically connected with microcomputer (8).
2. full-automatic Biochemical Methane Potential test system as claimed in claim 1, it is characterised in that：The fermentation tank (2) includes tank
Body (10) and the rubber stopper (15) being sealingly disposed in tank body (10) opening, tank body (10) bottom is provided with inlet (9), tank
Body (10) top is provided with liquid outlet (20), and the inlet (9) and liquid outlet (20) are connected with flexible pipe by threaded cap with holes,
The rubber stopper (15) is provided with least two airway tubes (16) and a straight tube (19) through rubber stopper (15) upper and lower ends,
Straight tube (19) bottom is connected with flexible sealing pipe (12), and flexible sealing pipe (12) bottom is embedded with sealing-plug (22),
Flexible sealing pipe (12) is provided with thorn (21), and flexible sealing pipe (12) Upper vertical, bottom are provided with inclination turning, institute
Tank body (10) upper end is stated provided with support base (18), the support base (18) is provided with direct current generator (17), the direct current generator
(17) metallic rod (11) is connected with, the metallic rod (11) is through straight tube (19) and stretches into flexible sealing pipe (12) inside.
3. full-automatic Biochemical Methane Potential test system as claimed in claim 2, it is characterised in that：The tank body of the fermentation tank (2)
(10) thermometer (13) and pH meter (14) are provided with.
4. full-automatic Biochemical Methane Potential test system as claimed in claim 1, it is characterised in that：The fermentation tank (2) and gas
Gas buffer bottle (23) is provided with gas circuit between purifier (4).
5. full-automatic Biochemical Methane Potential test system as claimed in claim 1, it is characterised in that：The gas cleaning plant (4)
Including alkali liquor absorption bottle (25) and acid solution absorption bottle (27), aqueous slkali is loaded with the alkali liquor absorption bottle (25), acid solution absorbs
It is loaded with bottle (27) and is equipped with air inlet pipe (24) on acid solution, the alkali liquor absorption bottle (25) and acid solution absorption bottle (27) and goes out
Tracheae (26), air inlet pipe (24) bottom is located at below alkali liquor absorption bottle (25) and acid solution absorption bottle (27) interior liquid level, outlet
Pipe (26) bottom is located at more than alkali liquor absorption bottle (25) and acid solution absorption bottle (27) interior liquid level.
6. full-automatic Biochemical Methane Potential test system as claimed in claim 1, it is characterised in that：The gas drier (5)
Including drying tube (28), absorbent cotton and drier are filled with inside the drying tube (28).
7. full-automatic Biochemical Methane Potential test system as claimed in claim 1, it is characterised in that：The bubble metrological service includes
The optical pulse generator (31) and light pulse detector (32) being oppositely arranged, the light pulse detector (32) and microcomputer (8) electricity
Connection.
8. full-automatic Biochemical Methane Potential test system as claimed in claim 7, it is characterised in that：The measurement pipe (7) it is U-shaped or
L-type, the cut (33) is arranged on measurement pipe (7) bottom level section, and the bore of cut (33) gradually subtracts along gas flow direction
It is small.
9. full-automatic Biochemical Methane Potential test system as claimed in claim 7, it is characterised in that：The outlet of the measurement pipe (7)
Mouth (30) place is provided with pressure-temperature sensor (35), and the pressure-temperature sensor (35) is electrically connected with microcomputer (8).
10. full-automatic Biochemical Methane Potential test system as claimed in claim 7, it is characterised in that：The air inlet of the measurement pipe (7)
The bore of mouth (29) and gas outlet (30) is respectively less than the caliber of measurement pipe (7).
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