CN206767809U - Biogas slurry treatment system with vegetable hydroponic cooperative disposal is absorbed based on CO2 - Google Patents
Biogas slurry treatment system with vegetable hydroponic cooperative disposal is absorbed based on CO2 Download PDFInfo
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- CN206767809U CN206767809U CN201720464623.3U CN201720464623U CN206767809U CN 206767809 U CN206767809 U CN 206767809U CN 201720464623 U CN201720464623 U CN 201720464623U CN 206767809 U CN206767809 U CN 206767809U
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Abstract
It the utility model is related to one kind and be based on CO2Absorb the biogas slurry treatment system with vegetable hydroponic cooperative disposal, including biogas slurry filter plant, firing equipment, heat-exchange apparatus, biogas slurry decompression deamination equipment, deamination biogas slurry CO2Absorption tower, the prewired equipment of organic nutrient solution for cultivating, methane purification gas storage device, ammoniacal liquor collecting device, romaine lettuce depth liquid stream cultivating device, deep liquid stream cultivation air feed equipment, relief liquor collecting device.After the utility model pre-processes lifting pH with accessory substance biogas slurry caused by organic matter anaerobic fermentation by deamination, as CO in biogas2Absorbent, can be in the case where not adding any external source absorbent, purifying biogas, by CH in biogas4Volume fraction is lifted to more than 85%.Absorb CO2For deamination biogas slurry afterwards after low power dilutes, alternative inorganic nutrient solution is used for water planting industry, and the romaine lettuce after being handled by deamination biogas slurry water planting shows to be obviously improved compared with inorganic nutrient solution culture in quality, yield etc..
Description
Technical field
It the utility model is related to methane purification and biogas slurry harmless treatment integrated technique field, and in particular to one kind is based on
CO2Absorb the biogas slurry treatment system with vegetable hydroponic cooperative disposal.
Background technology
Biogas mainly by volume fraction be 60%~70% CH4, 30%~40% CO2And micro H2S etc. is into packet
Into being a kind of regenerative resource of cleaning, had been widely used in China.Based on this, the various types of biogas engineering quantity in China
It is continuously increased.With being continuously increased for biogas engineering quantity, the inexpensive harmless treatment disposal of biogas slurry increasingly receives much concern, its
Turn into one of critical bottleneck for restricting biogas engineering benign development.Biogas slurry is the important by-products in marsh gas fermentation processes, tool
There is the features such as yield is big, cheap, nutrient is abundant, be a kind of renewable resource.Effective, the innoxious use of biogas slurry can be real
The reusable edible of existing resource.Rich in crude fibre, nitrogen, phosphorus, potassium, trace element, amino acid, activity in the biogas slurry of normal fermentation
The materials such as enzyme, auxin, antibiotic, decomposed degree is high, and is free of germ and worm's ovum, and these compositions are all plant growths
Necessary nutriment.Correlative study shows, biogas slurry is used as the root fertilizer of plant, can increase the yield of crops, again can be with
Non-polluted farm product is produced, there is good Social benefit and economic benefit.But high ammonia-nitrogen content and heightization in biogas slurry
Serious toxic action can be caused to plant by learning oxygen demand (COD) concentration, it is necessary to first carry out ammonia nitrogen removal processing and COD concentration
Control.In order to improve biogas slurry ammonia nitrogen removal efficiency, the pH value of biogas slurry should be lifted first, and wherein free ammonia ratio is significantly increased.
Biogas slurry after being handled by deamination, ammonia-nitrogen content and COD concentration can decline, but pH is high, it is necessary to can just enter after pH is stable
One step utilizes.Obviously, the quick reduction of biogas slurry pH value can be realized by adding acid, but acid consumption is big, and cost is high, while outside
Acid adding may also can form secondary pollution.Therefore, it is necessary to find what biogas slurry pH after a kind of inexpensive, free of contamination deamination was reduced
Method.
Contain substantial amounts of CO in biogas caused by biogas engineering2, available for the pH value for reducing deamination biogas slurry, realize biogas slurry pH
The stabilization of value.Meanwhile CO in biogas2After being absorbed by high ph-values biogas slurry, CH4Content increase, biogas calorific value are increased dramatically, had
Help expand the use range of biogas, beneficial to the high-valued and industrial applications of biogas.In addition, high ph-values deamination biogas slurry is as natural pond
Gas CO2Absorbent, can be without reusing, i.e., without to rich CO2Biogas slurry is regenerated, and has abandoned existing biogas CO2Chemical absorbing
In method technique to extraneous Energy Dependence the best part (i.e. rich CO2The hot recycling part of solution, it can account for the 60% of total energy consumption
More than), biogas CO can be greatly reduced2Chemical absorbing energy consumption, and then be advantageous to that biogas CO is greatly reduced2Separation costs.However, inhale
Receive CO2Although biogas slurry after stable pH value reduces ammonia nitrogen and COD contents, but can't reach the discharge standard of farmland-use water,
Need further to handle.
Water planting industrial crops have preferable detergent power to sewage, and the ammonia nitrogen and COD concentration of sewage can be greatly reduced.Such as with
Exemplified by the water planting of sponge gourd, wild rice stem, oenanthe stolonifera, green water cress etc., when dwell time of sewage is 120h, the removal of Pollutants in Wastewater
Effect is：Nitrogen removal rate reaches up to 89.0%~95.9%, total tp removal rate up to 81.3%~98.6%, ammonium nitrogen clearance
93.9%~99.6%, COD clearances are up to 35.6%~87.4%.Obviously, vegetable hydroponic processing is carried out to biogas slurry, it will have
Help that its ammonia nitrogen and COD contents is greatly reduced.Meanwhile all actively promoting the mould of soilless culture production vegetables at present both at home and abroad
Formula, soilless culture as advanced technology widely used in world's industrialized agriculture, have avoid soil-borne disease insect pest and continuous cropping obstacle,
Many advantages, such as utilization rate of fertilizer height, using water wisely and controllability of production, it has also become development nuisanceless green vegetables production
Reliable approach.But the nutrient solution cost that soilless culture at present is prepared is high, mainly using inorganic chemicals, to environmental hazard
Greatly.Therefore, replaced with biogas slurry or part substituted chemistry nutrient solution carries out vegetable growing and will had for improving vegetable yields and quality
It is significant.But the water planting of biogas slurry is all to reach the utilization of biogas slurry by simple dilution for many times at present, can not only be wasted
A large amount of fresh water, reduce can also because of excess dilution some component contents ineffective.
The content of the invention
The purpose of this utility model is that providing one kind is based on CO2Absorb the biogas slurry treatment system with vegetable hydroponic cooperative disposal
System, the System and method for add CaO progress pH adjustment to former biogas slurry caused by biogas engineering and removed with COD, then carried out first
Depressurize deamination processing.After deamination processing, the ammonia-nitrogen content in former biogas slurry can decline about 92.2%, COD contents and can decline about
40.1% (specific effect is referring to subordinate list 1), while pH is promoted to about 12 level.Then the strong basicity of deamination biogas slurry is relied on
Matter, the biogas that biogas engineering is produced is subjected to repeatedly circulation to promote deamination biogas slurry to CO in biogas2Separate absorbent, general 3
~4 circulations can be such that deamination biogas slurry pH is reduced between 6~7, the CH in biogas4Content brings up to more than 85%.Absorb CO2
Deamination biogas slurry afterwards is rationally diluted according to ammonia-nitrogen content, is passed through in romaine lettuce hydroponic system, and batch (-type) confession is carried out to the system
Gas, and monitor the electrical conductivity (EC) of deamination nutrient solution, EC can be reduced to 500 μ s/cm, COD now at general 10~14 days
The standard of farmland irrigation water can be fully met, can be directly discharged to be used as micro fertilizer or irrigation in farmland.In the present system,
Biogas slurry after collaboration is handled concentrates discharge after being collected.Meanwhile the ammonia nitrogen of biogas slurry removing will be reclaimed in the form of ammoniacal liquor, can be used
In leaf vegetables root fertilizer or sale.Farmland can be reached to biogas slurry progress harmless treatment by the utility model and use standard, together
When can obtain nuisanceless, nutritive value than cultivating higher romaine lettuce by chemotrophy liquid, can also in biogas engineering completely according to
By engineering, caused biogas slurry realizes CO in biogas in itself2Separation, makes CH4Content brings up to more than 85%, and then realizes that biogas slurry is harmless
Processing and triple targets of high-quality, the production of inexpensive romaine lettuce and biogas higher value application.
In order to solve the above technical problems, a kind of disclosed in the utility model be based on CO2Absorb and vegetable hydroponic cooperative disposal
Biogas slurry treatment system, it is characterised in that：It includes biogas slurry decompression deamination equipment, deamination biogas slurry CO2Absorption tower, organic nutrient solution for cultivating
Prewired equipment, methane purification gas storage device, romaine lettuce depth liquid stream cultivating device, deep liquid stream cultivation air feed equipment, relief liquor are collected
Equipment, biogas slurry filter plant, firing equipment, ammoniacal liquor collecting device and methane-generating pit, wherein, the biogas slurry outlet connection natural pond of methane-generating pit
The input port of liquid filter plant, the input of the delivery outlet connection firing equipment of biogas slurry filter plant, the output end of firing equipment
Connect the filtering biogas slurry inlet of biogas slurry decompression deamination equipment, the condensate port connection ammoniacal liquor collecting device of biogas slurry decompression deamination equipment
Input, the ammoniacal liquor collecting device has an ammoniacal liquor outlet, and the deamination biogas slurry liquid outlet connection of biogas slurry decompression deamination equipment is de-
Ammonia biogas slurry CO2The deamination biogas slurry inlet on absorption tower, deamination biogas slurry CO2The biogas of the biogas air inlet connection methane-generating pit on absorption tower
Mouthful, deamination biogas slurry CO2The rich CO of the rich co2 deamination biogas slurry liquid outlet connection prewired equipment of organic nutrient solution for cultivating on absorption tower2Deamination biogas slurry
Inlet, deamination biogas slurry CO2The air inlet of the gas outlet connection methane purification gas storage device of the methane purification gas on absorption tower, natural pond
The gas outlet of the pure gas storage device of air lift connects deamination biogas slurry CO by gas compressor2The methane purification gas air inlet on absorption tower
Mouthful, the organic nutrient solution for cultivating feed liquor of the organic nutrient solution for cultivating liquid outlet connection romaine lettuce depth liquid stream cultivating device of the prewired equipment of organic nutrient solution for cultivating
Mouthful, the steam line of the deep liquid stream cultivation air feed equipment of laying in romaine lettuce depth liquid stream cultivating device, romaine lettuce depth liquid stream cultivating device
Cultivate waste liquid liquid outlet access relief liquor collecting device.
It also includes heat-exchange apparatus, the first input of the delivery outlet connection heat-exchange apparatus of the biogas slurry filter plant
End, the input of the first output end connection firing equipment of heat-exchange apparatus, the deamination biogas slurry of biogas slurry decompression deamination equipment go out liquid
Second input of mouth connection heat-exchange apparatus, the second output end connection deamination biogas slurry CO of heat-exchange apparatus2Absorption tower takes off
Ammonia biogas slurry inlet.
The contemplated above technical scheme of the utility model compared with prior art, has the advantages that：
1st, after the utility model carries out deamination pretreatment with accessory substance biogas slurry caused by biogas engineering anaerobic fermentation, using de-
The strong basicity of calcium hydroxide is as CO in ammonia biogas slurry2Absorbent, by deamination biogas slurry circulate be passed through biogas, realize biogas
Whole purifications of biogas are produced in engineering, so as to obtain CH4The high high-quality marsh gas purification gas of content.Biogas slurry absorbent used is ring
Border friendly absorbent, it is degradable, and cost is low, can effectively reduce CO in biogas2The cost of removing.
2nd, the utility model replaces chemotrophy liquid to be planted for romaine lettuce water planting with deamination biogas slurry, is pre-processed by deamination
Biogas slurry ammonia nitrogen and COD contents are low (specific data see attached list 1), and required fresh water extension rate is low during for planting, and can save water money
Source.While deamination biogas slurry can substitute expensive chemotrophy liquid and be applied to water planting, water planting cost is low, prepares organic nutrient solution for cultivating
Process is simple and convenient.
3rd, the EC (electrical conductivity) of the biogas slurry after cooperative disposal, pH, COD, total phosphorus (TP) and ammonia nitrogen concentration are below agricultural
Irrigation water standard (detailed data sees attached list 3), waste liquid is already close to limpid (specific effect is shown in accompanying drawing 2), and the weight in biogas slurry
Tenor can be ignored substantially, it is proposed that and directly discharge as irrigation water or irrigated as micro- fertilizer, it is both green to have
Effect has handled biogas slurry, will not also cause farmland waste of leaving unused because of defaulted biogas slurry because of biogas slurry is directly discharged.
4th, the romaine lettuce planted by the culture of deamination biogas slurry, compared to the plantation of chemotrophy liquid, quality and yield has been lifted
(see accompanying drawing 3, accompanying drawing 4).Have yield high by the romaine lettuce of deamination biogas slurry culture, plant is strengthened, and chlorophyll content is high, photosynthate
The advantages that cumulant is more, and Vitamin C content is more, and nitrate content is few.And whole hydroponic system green pollution-free.
Brief description of the drawings
Fig. 1 is structured flowchart of the present utility model；
Fig. 2 is former biogas slurry, deamination biogas slurry and the turbidity of 5 times of dilutions after water planting, 10 times of dilution biogas slurries and chemotrophy liquid
Apparent figure；
Fig. 3 is that deamination biogas slurry dilutes 5 times, 10 times of Agronomic Characteristics for being used for water planting romaine lettuce and chemotrophy liquid water planting romaine lettuce
Compare；
Fig. 4 is that deamination biogas slurry dilutes 5 times, 10 times of physiologic characters for being used for water planting romaine lettuce and chemotrophy liquid water planting romaine lettuce
Compare；
Table 1 is that the corresponding index before and after biogas slurry decompression deamination changes table；
Table 2 is that deamination biogas slurry is used for the water planting romaine lettuce corresponding index of 35 days change table；
Waste liquid index of correlation and farmland irrigation water standard comparing table when table 3 is for water planting 14 days.
Wherein, 1-biogas slurry decompression deamination equipment, 1.1-filtering biogas slurry inlet, 1.2-deamination biogas slurry liquid outlet,
1.3-condensate port, 2-deamination biogas slurry CO2Absorption tower, 2.1-deamination biogas slurry inlet, 2.2-biogas air inlet, 2.3-richness
CO2Deamination biogas slurry liquid outlet, the gas outlet of 2.4-methane purification gas, 2.5-methane purification gas air inlet, 3-methane purification gas
The prewired equipment of storage device, 3.1-gas compressor, 4-organic nutrient solution for cultivating, 4.1-rich CO2Deamination biogas slurry inlet, 4.2-
Organic nutrient solution for cultivating liquid outlet, 5-romaine lettuce depth liquid stream cultivating device, 5.1-organic nutrient solution for cultivating inlet, 5.2-cultivation waste liquid go out
Liquid mouth, 6-deep liquid stream cultivation air feed equipment, 6.1-steam line, 7-relief liquor collecting device, 7.1-discharge opeing outlet, 8-
Methane-generating pit, the outlet of 8.1-biogas slurry, 8.2-biogas mouth, 8.3-gas compressor, 9-biogas slurry filter plant, 10-heat exchange are set
Standby, 11-firing equipment, 12-ammoniacal liquor collecting device, the outlet of 12.1-ammoniacal liquor.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail：
One kind of the present utility model is based on CO2The biogas slurry treatment system with vegetable hydroponic cooperative disposal is absorbed, it includes natural pond
Liquid decompression deamination equipment 1, deamination biogas slurry CO2Absorption tower 2, the prewired equipment 4 of organic nutrient solution for cultivating, methane purification gas storage device 3, life
Dish depth liquid stream cultivating device 5, deep liquid stream cultivation air feed equipment 6, relief liquor collecting device 7, biogas slurry filter plant 9, firing equipment
11st, ammoniacal liquor collecting device 12 and methane-generating pit 8, wherein, the input of the connection biogas slurry filter plant 9 of biogas slurry outlet 8.1 of methane-generating pit 8
Mouthful, the input of the delivery outlet connection firing equipment 11 of biogas slurry filter plant 9, the output end connection biogas slurry decompression of firing equipment 11
The filtering biogas slurry inlet 1.1 of deamination equipment 1, the condensate port 1.3 of biogas slurry decompression deamination equipment 1 connect ammoniacal liquor collecting device 12
Input, the ammoniacal liquor collecting device 12 have ammoniacal liquor outlet 12.1 (ammoniacal liquor of collection needs to discharge from the outlet), and biogas slurry subtracts
The deamination biogas slurry liquid outlet 1.2 of pressure-off ammonia equipment 1 connects deamination biogas slurry CO2The deamination biogas slurry inlet 2.1 on absorption tower 2, deamination
Biogas slurry CO2The biogas air inlet 2.2 on absorption tower 2 connects the biogas mouth 8.2 of methane-generating pit 8, deamination biogas slurry CO2The rich CO on absorption tower 22
Deamination biogas slurry liquid outlet 2.3 connects the rich CO of the prewired equipment 4 of organic nutrient solution for cultivating2Deamination biogas slurry inlet 4.1, deamination biogas slurry CO2Inhale
The gas outlet 2.4 for receiving the methane purification gas of tower 2 connects the air inlet of methane purification gas storage device 3, and methane purification gas storage is set
Standby 3 gas outlet connects deamination biogas slurry CO by gas compressor 3.12The methane purification gas air inlet 2.5 on absorption tower 2, it is organic
The organic nutrient solution for cultivating liquid outlet 4.2 of the prewired equipment 4 of nutrient solution connects the organic nutrient solution for cultivating inlet of romaine lettuce depth liquid stream cultivating device 5
5.1, the steam line 6.1 of the deep liquid stream cultivation air feed equipment 6 of the interior laying of romaine lettuce depth liquid stream cultivating device 5, the cultivation of romaine lettuce depth liquid stream
The cultivation waste liquid liquid outlet 5.2 of equipment 5 accesses relief liquor collecting device 7.
In above-mentioned technical proposal, it also includes heat-exchange apparatus 10, and the delivery outlet connection heat of the biogas slurry filter plant 9 is handed over
The first input end of exchange device 10, the input of the first output end connection firing equipment 11 of heat-exchange apparatus 10, biogas slurry decompression
The deamination biogas slurry liquid outlet 1.2 of deamination equipment 1 connects the second input of heat-exchange apparatus 10, and the second of heat-exchange apparatus 10 is defeated
Go out end connection deamination biogas slurry CO2The deamination biogas slurry inlet 2.1 on absorption tower 2.
In above-mentioned technical proposal, biogas slurry is transferred to biogas slurry by peristaltic pump and filtered by the biogas slurry outlet 8.1 of the methane-generating pit 8
The input port of equipment 9, biogas slurry filter plant 9 are provided with use between connecting the filtering biogas slurry inlet 1.1 of biogas slurry decompression deamination equipment 1
In the flowmeter of control flow.
In above-mentioned technical proposal, the deamination biogas slurry CO2The biogas air inlet 2.2 on absorption tower 2 and the biogas mouth of methane-generating pit 8
Gas compressor 8.3 is provided between 8.2.Caused methane energy in methane-generating pit 8 is set all to rapidly enter deamination biogas slurry CO2Absorb
Tower 2.
In above-mentioned technical proposal, the gas outlet of the methane purification gas storage device 3 connects deamination by gas compressor
Biogas slurry CO2The methane purification gas air inlet 2.5 on absorption tower 2.
In above-mentioned technical proposal, the organic nutrient solution for cultivating liquid outlet 4.2 of the prewired equipment 4 of organic nutrient solution for cultivating connects one section of water
The organic nutrient solution for cultivating inlet 5.1 of romaine lettuce depth liquid stream cultivating device 5 is connected after the integrated pipe network of fertilizer.
In above-mentioned technical proposal, the relief liquor collecting device 7 is provided with discharge opeing outlet 7.1, and discharge opeing outlet 7.1, which is provided with, matches somebody with somebody
Cover valve, the deamination biogas slurry CO2PH sensors are carried in absorption tower 2, romaine lettuce depth liquid stream cultivating device 5 carries conductivity sensors
Device.The measurement of pH sensors is deamination biogas slurry CO2The acid-base value of liquid in absorption tower 2, it is full to can be shown that CO2 absorbs less than 7
With；What conductivity sensor was surveyed is the solution in romaine lettuce depth liquid stream cultivating device 5, and electrical conductivity is less than 500 μ s/cm, is shown relative
The chemical oxygen demand cod answered can also be reduced to desired value.
In above-mentioned technical proposal, the deamination biogas slurry CO2The biogas air inlet 2.2 and rich CO on absorption tower 22Deamination biogas slurry goes out
Liquid mouth 2.3 is respectively positioned on deamination biogas slurry CO2The bottom of towe on absorption tower 2, the gas outlet 2.4 of methane purification gas are located at deamination biogas slurry CO2Absorb
The tower top of tower 2.The design ensures the CH in absorption tower4(density is less than air) smoothly discharges, while increases CO2(density is more than sky
Gas) assimilation effect.Deamination biogas slurry CO2Absorption tower 2 should accomplish it is as far as possible high, to increase effective contact of biogas and deamination biogas slurry
Area, increase CO2Uptake.
It is a kind of using said system based on CO2Absorb the biogas slurry treatment method with vegetable hydroponic cooperative disposal, this method
PH adjustment and COD removings are carried out by adding CaO to former biogas slurry caused by biogas engineering, then carries out depressurizing deamination pretreatment.
After deamination processing, the ammonia-nitrogen content in former biogas slurry can decline 92.2%, COD contents and can decline 40.1% (specific effect be referring to attached
Table 1), while pH is promoted to about 12 levels.Then the strong basicity of deamination biogas slurry is relied on, biogas caused by biogas engineering is entered
Row is repeatedly circulated to promote deamination biogas slurry to CO in biogas2Separate absorbent, general 3~4 circulations can make deamination biogas slurry pH
It is reduced between 6~7, the CH4 contents in biogas bring up to more than 85%.Absorb CO2Deamination biogas slurry afterwards is according to ammonia-nitrogen content
Rationally diluted, be passed through in romaine lettuce hydroponic system, batch (-type) supply is carried out to the system, and monitor the conductance of deamination nutrient solution
Rate (EC), EC can be reduced to 500 μ s/cm at general 10~14 days, and COD now can fully meet farmland irrigation water
Standard, it can be directly discharged to be used as micro fertilizer or irrigation in farmland, after the biogas slurry of cooperative disposal is collected in the present system
Concentrate discharge.Meanwhile the ammonia nitrogen of biogas slurry removing will be reclaimed in the form of ammoniacal liquor, available for leaf vegetables root fertilizer or sale.By this reality
Harmless treatment can be carried out to biogas slurry reach farmland using standard, while can obtain nuisanceless, nutritive value than logical with new
Cross chemotrophy liquid and cultivate higher romaine lettuce, engineering can be also fully relied in biogas engineering, and caused biogas slurry realizes biogas in itself
Middle CO2Separation, makes CH4Content bring up to more than 85% so that realize biogas slurry it is harmless processing and high-quality, inexpensive romaine lettuce production with
And triple targets of biogas higher value application.
The utility model specifically comprises the following steps：
Step 1：Fresh biogas slurry caused by methane-generating pit 8 enters biogas slurry filter plant 9 by biogas slurry outlet 8.1 and carried out
Filter, filtering biogas slurry pass through heat-exchange apparatus 10, after reclaiming a part of waste heat in deamination biogas slurry, then are passed through firing equipment 11 by heat
Filtering biogas slurry after exchange is heated to 75~85 DEG C (preferably 75 DEG C), deamination equipment 1 is depressurized subsequently into biogas slurry, in 40kPa bars
Under part, 10g/L CaO hybrid reactions are added 1 hour, the high ammonia nitrogen in former biogas slurry is removed, while reduce COD contents
(detailed data is as shown in appendix 1), and the ammonia volatilized is collected to ammoniacal liquor collecting device 12 by condensate port 1.3；
Step 2：The deamination biogas slurry liquid outlet 1.2 of the biogas slurry of deamination pretreatment from biogas slurry decompression deamination equipment 1 is handed over by heat
After exchange device 10 carries out heat exchange reduction temperature with filtering biogas slurry, deamination biogas slurry CO is drawn into peristaltic pump2Absorption tower 2, treat this
Biogas slurry after batch deamination fully enters deamination biogas slurry CO2Behind absorption tower 2, deamination biogas slurry inlet 2.1 and rich CO are closed2Deamination
(for the volume that biogas slurry enters depending on specific biogas engineering scale, using volume yield rate as 1, waterpower is stagnant for biogas slurry liquid outlet 2.3
Exemplified by staying the biogas engineering that the phase is 20 days, it is used for biogas CO2The biogas slurry of separation and biogas volume ratio are about 1：20), and by natural pond
The biogas in gas pond 8 is passed into deamination biogas slurry CO from biogas air inlet 2.22Absorption tower 2, in deamination biogas slurry CO2In absorption tower 2 with it is de-
Ammonia biogas slurry is reacted so as to realize CO in biogas2Absorption, methane purification gas passes through deamination biogas slurry CO2The biogas on absorption tower 2 carries
The gas outlet 2.4 of pure gas enters methane purification gas storage device 3 and stored, and treats that biogas is all passed through deamination natural pond caused by methane-generating pit 8
Liquid CO2Biogas air inlet 2.2 is closed behind absorption tower 2, is then turned on deamination biogas slurry CO2The methane purification gas air inlet on absorption tower 2
2.5, and the biogas in methane purification gas storage device 3 is pumped into by deamination biogas slurry CO by gas compressor 3.12Absorption tower 2
In, biogas recirculation is formed, makes CO in biogas2Absorption maximum processing is obtained, while observes deamination biogas slurry CO2The pH on absorption tower 2 is read
Number, as deamination biogas slurry CO2The pH readings on absorption tower 2 be reduced to less than 7 (typically circulate pH can be up to for 3~4 times 12 deamination
Biogas slurry is reduced to less than 7.And the methane purification gas methane content in methane purification gas storage device 3 now can be lifted to 85%
More than), the air inlet of closing methane purification gas storage device 3 and gas outlet；
Step 3：By deamination biogas slurries of the pH less than 7 from deamination biogas slurry CO2The rich CO on absorption tower 22Deamination biogas slurry liquid outlet 2.3
All it is passed into the prewired equipment 4 of organic nutrient solution for cultivating, 5~7 times of dilution is carried out with water, you can the deamination biogas slurry for making pH be less than 7
In ammonia nitrogen concentration be reduced to 10~18mg/L (preferably 18mg/L), it is standby to be configured to organic nutrient solution for cultivating；
Step 4：Organic nutrient solution for cultivating passes through liquid manure from organic nutrient solution for cultivating liquid outlet 4.2 in the prewired equipment 4 of organic nutrient solution for cultivating
Integrated pipe network is passed into romaine lettuce depth liquid stream cultivating device 5, and the romaine lettuce of nursery 9~11 days arrives romaine lettuce depth liquid using kickboard cultivation
Flow on cultivating device 5, while air feed equipment 6 cultivated by deep liquid stream intermittent aeration is carried out to organic nutrient solution for cultivating and (typically ventilate 5
Stop 20 minutes (circulate operation) after minute, with the dissolved oxygen (DO) in this liquid that has additional nutrients, ensure romaine lettuce root system eupnea),
The electrical conductivity display screen on romaine lettuce depth liquid stream cultivating device 5 is observed, when the organic nutrient solution for cultivating in romaine lettuce depth liquid stream cultivating device 5
Electrical conductivity is reduced to 450~550 μ s/cm, and (preferably 500 μ s/cm, after general 10~14 days, the conductivity value of nutrient solution can be from
1500~2000 μ s/cm are reduced to 500 μ s/cm or so, and now the COD in organic nutrient solution for cultivating can also reduce from 300~400mg/L
To 100~150mg/L (detailed data sees attached list 2)) when, this batch of organic nutrient solution for cultivating becomes cultivation waste liquid；
Step 5：Above-mentioned cultivation waste liquid is passed into by the cultivation waste liquid liquid outlet 5.2 of romaine lettuce depth liquid stream cultivating device 5
In relief liquor collecting device 7, next group is passed through in romaine lettuce depth liquid stream cultivating device 5 again made of the deamination biogas slurry newly handled
Organic nutrient solution for cultivating, by carrying out index determining to the waste liquid in relief liquor collecting device 7, the EC (conductances of biogas slurry after cooperative disposal
Rate), pH, COD, total phosphorus (TP) and ammonia nitrogen concentration can be less than agricultural irrigation water standard (seeing attached list 3), while be ground according to relevant
Study carefully and show, the content of beary metal in biogas slurry can be ignored substantially, therefore can be by this waste liquid as farmland irrigation water or as micro- fertilizer
It is poured onto in farmland；
Step 6：The romaine lettuce planted in romaine lettuce depth liquid stream cultivating device 5 (grows one after organic nutrient solution for cultivating 3 times is changed
After month), that is, harvested, next group romaine lettuce plantation is carried out after clearing up romaine lettuce depth liquid stream cultivating device 5.
In the step 1 of above-mentioned technical proposal, the ammonia nitrogen of biogas slurry removing is reclaimed in the form of ammoniacal liquor, available for leaf vegetables root
Fertilizer or sale.
In the step 2 of above-mentioned technical proposal, deamination biogas slurry CO2The deamination biogas slurry liquid inlet volume on absorption tower 2 is with being used for what is purified
For biogas volume ratio depending on the volume yield rate of biogas engineering and the ratio of hydraulic retention times, biogas volume can be according to volume
Factor of created gase is estimated (biogas slurry volume=volume yield rate × hydraulic retention times) with hydraulic retention times.Methane purification gas storage device
3 and deamination biogas slurry CO2Gas circulation number between absorption tower 2 is according to deamination CO2PH display datas on absorption tower are determined, typically
PH stops circulation when dropping to less than 7.
In the step 3 of above-mentioned technical proposal, CO is absorbed2Deamination biogas slurry afterwards prepares extension rate root during organic nutrient solution for cultivating
Ammonia nitrogen concentration according to the deamination biogas slurry of deamination pretreatment is determined, and the purpose of dilution is that the ammonia nitrogen concentration in deamination biogas slurry is reduced into 10
~18mg/L, to ensure the normal growth of romaine lettuce.
In the step 4 of above-mentioned technical proposal, it must be aerated during Growth of Lettuce, to increase organic nutrition in equipment
The dissolved oxygen (DO) of liquid, aeration duration suggestion are carried out with batch (-type), and supply stops 20 minutes after 5 minutes.On deep liquid stream cultivating device
EC display screens can aid in understand organic nutrient solution for cultivating in composition transfer, when EC is reduced to 500 μ s/cm or so, show it
COD has reduced 50% or so, and this batch pretreatment biogas slurry can carry out irrigation discharge.
In the step 5 of above-mentioned technical proposal, the organic nutrition in deep liquid stream culture device should be supplemented after discharge waste liquid immediately
Liquid, while pay attention to the impurity such as the algae in cleaning culture pond.
In the step 6 of above-mentioned technical proposal, romaine lettuce is typically cultivated 30-40 days and can harvested.
Corresponding index change before and after the biogas slurry of subordinate list 1. decompression deamination
The deamination biogas slurry of subordinate list 2. changes for the water planting romaine lettuce corresponding index of 35 days
Waste liquid index of correlation and farmland irrigation water standard comparing when subordinate list 3. is used for water planting 14 days
The content that this specification is not described in detail belongs to prior art known to professional and technical personnel in the field.
Claims (8)
1. one kind is based on CO2Absorb the biogas slurry treatment system with vegetable hydroponic cooperative disposal, it is characterised in that：It subtracts including biogas slurry
Pressure-off ammonia equipment (1), deamination biogas slurry CO2Absorption tower (2), the prewired equipment of organic nutrient solution for cultivating (4), methane purification gas storage device
(3), romaine lettuce depth liquid stream cultivating device (5), deep liquid stream cultivation air feed equipment (6), relief liquor collecting device (7), biogas slurry filtering are set
Standby (9), firing equipment (11), ammoniacal liquor collecting device (12) and methane-generating pit (8), wherein, the biogas slurry outlet of methane-generating pit (8)
(8.1) input port of biogas slurry filter plant (9) is connected, the delivery outlet of biogas slurry filter plant (9) connects the defeated of firing equipment (11)
Enter end, the filtering biogas slurry inlet (1.1) of the output end connection biogas slurry decompression deamination equipment (1) of firing equipment (11), biogas slurry subtracts
The input of condensate port (1.3) the connection ammoniacal liquor collecting device (12) of pressure-off ammonia equipment (1), ammoniacal liquor collecting device (12) tool
There is ammoniacal liquor to export (12.1), deamination biogas slurry liquid outlet (1.2) the connection deamination biogas slurry CO of biogas slurry decompression deamination equipment (1)2Absorb
The deamination biogas slurry inlet (2.1) of tower (2), deamination biogas slurry CO2Biogas air inlet (2.2) the connection methane-generating pit (8) on absorption tower (2)
Biogas mouth (8.2), deamination biogas slurry CO2The rich CO on absorption tower (2)2Deamination biogas slurry liquid outlet (2.3) connection organic nutrient solution for cultivating is prewired
The rich CO of equipment (4)2Deamination biogas slurry inlet (4.1), deamination biogas slurry CO2The gas outlet of the methane purification gas on absorption tower (2)
(2.4) air inlet of methane purification gas storage device (3) is connected, the gas outlet of methane purification gas storage device (3) passes through gas
Compressor (3.1) connection deamination biogas slurry CO2The methane purification gas air inlet (2.5) on absorption tower (2), the prewired equipment of organic nutrient solution for cultivating
(4) the organic nutrient solution for cultivating inlet (5.1) of organic nutrient solution for cultivating liquid outlet (4.2) connection romaine lettuce depth liquid stream cultivating device (5), it is raw
The steam line (6.1) of the deep liquid stream cultivation air feed equipment (6) of laying, the cultivation of romaine lettuce depth liquid stream in dish depth liquid stream cultivating device (5)
Cultivation waste liquid liquid outlet (5.2) the access relief liquor collecting device (7) of equipment (5).
2. according to claim 1 be based on CO2Absorb and the biogas slurry treatment system of vegetable hydroponic cooperative disposal, its feature exist
In：It also includes heat-exchange apparatus (10), and the delivery outlet of the biogas slurry filter plant (9) connects the first of heat-exchange apparatus (10)
Input, the input of the first output end connection firing equipment (11) of heat-exchange apparatus (10), biogas slurry decompression deamination equipment (1)
Deamination biogas slurry liquid outlet (1.2) connection heat-exchange apparatus (10) the second input, heat-exchange apparatus (10) second output
End connection deamination biogas slurry CO2The deamination biogas slurry inlet (2.1) on absorption tower (2).
3. according to claim 1 be based on CO2Absorb and the biogas slurry treatment system of vegetable hydroponic cooperative disposal, its feature exist
In：Biogas slurry is transferred to the input port of biogas slurry filter plant (9) by peristaltic pump by the biogas slurry outlet (8.1) of the methane-generating pit (8),
It is provided between the filtering biogas slurry inlet (1.1) of biogas slurry filter plant (9) connection biogas slurry decompression deamination equipment (1) and is used for controlling stream
The flowmeter of amount.
4. according to claim 1 be based on CO2Absorb and the biogas slurry treatment system of vegetable hydroponic cooperative disposal, its feature exist
In：The deamination biogas slurry CO2It is provided between the biogas air inlet (2.2) on absorption tower (2) and the biogas mouth (8.2) of methane-generating pit (8)
Gas compressor (8.3).
5. according to claim 1 be based on CO2Absorb and the biogas slurry treatment system of vegetable hydroponic cooperative disposal, its feature exist
In：The gas outlet of the methane purification gas storage device (3) connects deamination biogas slurry CO by gas compressor (3.1)2Absorption tower
(2) methane purification gas air inlet (2.5).
6. according to claim 1 be based on CO2Absorb and the biogas slurry treatment system of vegetable hydroponic cooperative disposal, its feature exist
In：The organic nutrient solution for cultivating liquid outlet (4.2) of the prewired equipment of organic nutrient solution for cultivating (4) connects after connecting one section of water-fertilizer integral pipe network
Deliver a child the organic nutrient solution for cultivating inlet (5.1) of dish depth liquid stream cultivating device (5).
7. according to claim 1 be based on CO2Absorb and the biogas slurry treatment system of vegetable hydroponic cooperative disposal, its feature exist
In：The relief liquor collecting device (7) is provided with discharge opeing outlet (7.1), and discharge opeing outlet (7.1) is provided with mating valve, described de-
Ammonia biogas slurry CO2PH sensors are carried in absorption tower (2), romaine lettuce depth liquid stream cultivating device (5) carries conductivity sensor.
8. according to claim 1 be based on CO2Absorb and the biogas slurry treatment system of vegetable hydroponic cooperative disposal, its feature exist
In：The deamination biogas slurry CO2The biogas air inlet (2.2) and rich co2 deamination biogas slurry liquid outlet (2.3) on absorption tower (2) are respectively positioned on
Deamination biogas slurry CO2The bottom of towe on absorption tower (2), the gas outlet (2.4) of methane purification gas are located at deamination biogas slurry CO2The tower on absorption tower (2)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107089734A (en) * | 2017-04-28 | 2017-08-25 | 华中农业大学 | Based on CO2Absorb the biogas slurry treatment System and method for vegetable hydroponic cooperative disposal |
| CN113632722A (en) * | 2021-09-24 | 2021-11-12 | 农业部沼气科学研究所 | Method for water planting vegetables by utilizing biogas slurry |
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2017
- 2017-04-28 CN CN201720464623.3U patent/CN206767809U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107089734A (en) * | 2017-04-28 | 2017-08-25 | 华中农业大学 | Based on CO2Absorb the biogas slurry treatment System and method for vegetable hydroponic cooperative disposal |
| CN113632722A (en) * | 2021-09-24 | 2021-11-12 | 农业部沼气科学研究所 | Method for water planting vegetables by utilizing biogas slurry |
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