CN101920258B - Energy utilization system of organic wastes with zero emission of carbon dioxide - Google Patents

Energy utilization system of organic wastes with zero emission of carbon dioxide Download PDF

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CN101920258B
CN101920258B CN2010102324168A CN201010232416A CN101920258B CN 101920258 B CN101920258 B CN 101920258B CN 2010102324168 A CN2010102324168 A CN 2010102324168A CN 201010232416 A CN201010232416 A CN 201010232416A CN 101920258 B CN101920258 B CN 101920258B
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carbon dioxide
reactor
anaerobic
hydrogen
bioreactor
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CN2010102324168A
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CN101920258A (en
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李�东
孙永明
袁振宏
孔晓英
李连华
马隆龙
王忠铭
庄新姝
许敬亮
吕鹏梅
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中国科学院广州能源研究所
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/20Waste processing or separation

Abstract

The invention provides an energy utilization system of organic wastes with zero emission of carbon dioxide, which organically combines anaerobic fermentation hydrogen production, methane fermentation, CO2 absorption, microalgae fixation CO2, biogas liquid treatment and energy grass planting. The system is suitable for treating various types of organic wastes, can be applied to the treatment of agricultural organic wastes, industrial organic wastes, domestic organic wastes, slurry and the like, and the industries, such as new energy development. Through the application of the invention, the specific application demonstration of recycling economy can be carried out, clean energy is obtained while eliminating environmental pollution, no greenhouse gas emits in the process, and the triple effects of wastes treatment, production of clean and renewable energy sources and reduction of carbon dioxide emission can be realized.

Description

The system of carbon dioxide zero discharge type organic waste recovery energy
Technical field
The invention belongs to offal treatment and development of clean energy field, be specifically related to a kind of system of carbon dioxide zero discharge type organic waste recovery energy.
Technical background
It has been undisputable fact that the transition development and utilization of fossil fuel causes global warming, acid rain and environmental destruction and degeneration; And fossil fuel also is faced with the situation of exhaustion; Therefore consider based on the environment and the energy that the mankind press for a kind of regenerative resource that does not have pollution.Hydrogen Energy is the renewable alternative fuel of a kind of desirable cleaning, only generates water after its burning, does not have other greenhouse gases, can directly be converted into electric energy efficiently through fuel cell.Consider that from the angle of environment utilizing various organic wastes to carry out anaerobic fermentation hydrogen manufacturing is a big research focus in recent years, and is considered to most possibly take the lead in realizing the commercial applications bio-hydrogen production technology.
The organic substance that the Biochemical Mechanism of anaerobic fermentation hydrogen manufacturing has determined to carry out hydrogen production through anaerobic fermentation mainly is carbohydrate raw material such as carbohydrate, starch and cellulose family, and protein and lipid difficulty are carried out hydrogen production through anaerobic fermentation; And, follow the formation of accessory substances such as various small molecular organic acids and alcohols in the time of the carbohydrate fermentation and hydrogen production, can not be converted into hydrogen fully.More than two reasons cause the energy recovery efficient of organic waste anaerobic fermentation hydrogen manufacturing and organic utilization rate lower.For this reason; Usually adopt the technology of anaerobic fermentation co-producing hydrogen and methane to improve energy recovery efficient; At first utilize organic waste to carry out hydrogen production through anaerobic fermentation; Utilize to produce hydrogen residue (comprise protein, each seed amino acid, lipid, and the product hydrogen accessory substance of carbohydrate such as organic acid, alcohol) again and carry out anaerobic fermentation methane, promptly traditional biogas fermentation.
When the biogas conduct finally utilized form (like direct burning), on the stricti jurise, it was not a clean energy resource, even because the biogas (methane) after purifying still can be to the airborne release carbon dioxide after burning utilizes.Therefore, the mode of utilizing that cleans most is that biogas is converted into electric energy utilization.Yet; No matter be anaerobic fermentation hydrogen manufacturing; Still biogas fermentation+marsh gas power generation is all followed the generation of carbon dioxide, from the recovery energy process of whole organic waste; Have only carbon dioxide absorption, fixing, utilization again, be only carbon dioxide zero discharge type organic waste recovery energy system truly.
Except hydrogen and biogas, the product of organic waste anaerobic fermentation also has natural pond slag and natural pond liquid.Slag common as fertilizer sources in natural pond utilizes, and when being applied to food plant (cereal crops, orchard, vegetables etc.), need carry out deep processing to remove the noxious material (especially heavy metal) in the slag of natural pond, and this moment, the processing cost of natural pond slag was higher.If during as the fertilizer of non-edible plant (like energy grass), need not to carry out deep processing can directly use, and still, does not also have the correlative study report of natural pond slag as energy grass planting fertilizer at present with the natural pond slag.Natural pond liquid is usually as liquid fertilizer or agricultural irrigation water; But contain materials such as abundant nitrogen, phosphorus, metallic element in the liquid of natural pond; And the unit are soil is limited to the admittance ability of these materials; When not having enough soils to admit natural pond liquid, excessive natural pond liquid discharging can be polluted local environment on the contrary.On the other hand; Little algae needs nutriments such as nitrogen, phosphorus, potassium, trace element, vitamin when utilizing carbon dioxide to carry out photosynthetic growth as carbon source, and these materials Main Ingredients and Appearance of natural pond liquid just; Therefore; Can the processing of natural pond liquid and little algae stabilizing carbon dioxide be combined, still, also not have the correlative study report that natural pond liquid is handled and little algae stabilizing carbon dioxide (coming from the organic waste anaerobic fermentation) is coupled at present.
At present, has only independent organic waste anaerobic fermentation hydrogen manufacturing research, independent organic waste biogas fermentation+biogas power generation technology, independent carbon dioxide absorption, fixing, utilization research (carbon dioxide in little algae fixed air or the thermal power plant's flue gas) more both at home and abroad.The carbon dioxide zero discharge type organic waste recovery energy system that multinomial technology such as anaerobic fermentation hydrogen manufacturing, biogas fermentation, carbon dioxide absorption, little algae stabilizing carbon dioxide, the processing of natural pond liquid, energy grass planting are gathered; And this system can obtain two kinds of clean energy resourcies of hydrogen and electricity simultaneously, and such system does not appear in the newspapers at present as yet.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art; A kind of system of carbon dioxide zero discharge type organic waste recovery energy is provided; This system obtains two kinds of clean energy resourcies of hydrogen and electricity when handling organic waste, and not to external world's discharging carbon dioxide.
For solving the problems of the technologies described above, the present invention realizes through following technical scheme:
The system of carbon dioxide zero discharge type organic waste recovery energy of the present invention; Comprise raw material storage pond, pretreatment unit, product hydrogen regulating reservoir, anaerobic hydrogen-generating reactor, produce methane and reconcile pond, anaerobism methane-producing reactor, solid-liquid separating equipment, natural pond liquid regulating reservoir, mixing pond, bioreactor, air flotation tank, algae kind spread cultivation jar, carbon dioxide absorption tower, regeneration of absorption solution tower, first moisture trap, second moisture trap, carbon dioxide storage tank, hydrogen-holder, biogas desulfurization tower, biogas storage cabinet, marsh gas power generation unit, condenser, heat recovery system, fertilizer processing space, energy grass planting base that described raw material storage pond, pretreatment unit, product hydrogen regulating reservoir, anaerobic hydrogen-generating reactor, producing methane, to reconcile pond, anaerobism methane-producing reactor, solid-liquid separating equipment, natural pond liquid regulating reservoir, mixing pond, bioreactor, air flotation tank continuous successively; The gas vent of described anaerobic hydrogen-generating reactor, carbon dioxide absorption tower, first moisture trap, hydrogen-holder link to each other successively; The inlet of described carbon dioxide absorption tower and liquid outlet are communicated with the liquid outlet and the inlet of regeneration of absorption solution tower through pipeline respectively; Described regeneration of absorption solution tower, second moisture trap, carbon dioxide storage tank, bioreactor are communicated with through pipeline successively; The gas vent of anaerobism methane-producing reactor, biogas desulfurization tower, biogas storage cabinet, marsh gas power generation unit, condenser, carbon dioxide storage tank are communicated with through pipeline successively; The algae kind spread cultivation jar with the mixing pond through the pipeline connection; The upper and lower of air flotation tank is communicated with through pipeline with raw material storage pond and mixing pond respectively; The heat recovery system links to each other with marsh gas power generation unit, anaerobic hydrogen-generating reactor, anaerobism methane-producing reactor, bioreactor and fertilizer processing space respectively through pipeline; Be used to reclaim the waste heat that marsh gas power generation produces; And to anaerobic hydrogen-generating reactor, anaerobism methane-producing reactor, bioreactor and the heat supply of fertilizer processing space, the temperature raising and maintaining of realization response device or the oven dry of natural pond slag; Natural pond slag through solid-liquid separating equipment produces is applied to energy grass planting base as solid organic fertilizer after the processing of fertilizer processing space, the energy grass that results obtain is stored in the raw material storage pond as fermentation raw material.
Described raw material storage preferably is provided with a plurality of compartments in the pond, and the quantity of compartment is confirmed according to obtainable raw material type, independent compartment of every kind of independent product distribution.
Described pretreatment unit is preferably from one or more combinations of grid, disintegrating machine, pulverizer, settling pit.
Described anaerobic hydrogen-generating reactor and anaerobism methane-producing reactor are prior art popular response device, like plug flow reactor (PFR), complete mixing reactor (CSTR), anaerobism contact reactor (ACR), upflow anaerobic sludge blanket process (UASB), up-flow solid reactor (USR), expanded granular sludge bed (EGSB), internal-circulation anaerobic reactor (IC), outer circulation anaerobic reactor (EC), anaerobic batch reactor (ASBR), baffled reactor (ABR), anaerobic filter (AF), fiberfill bed (FPB), hybrid anaerobic reactor (UBF), anaerobic fluidized bed (FBR), anaerobic expanded bed (EBR), dried fermentation reactor (DA) etc.
One or more combinations of the preferred self compaction formula of described solid-liquid separating equipment spiral separator, horizontal centrifugal separator, supercentrifuge, filter, micro-filtration, ultrafiltration apparatus.
Described bioreactor is preferably closed photo bioreactor, further preferably from column formula bioreactor or tubular type bioreactor, board-like bioreactor, built-in light-source fermentation pot type bioreactor, optical fiber bioreactor.
Carbon dioxide absorption liquid is housed in the described carbon dioxide absorption tower; This carbon dioxide absorption liquid is water, Selexol (Main Ingredients and Appearance is a Poly Dimethyl Diallyl Ammonium Chloride ethylene glycol), MEA, diethanol amine, triethanolamine or aqueous slkali (NaOH, KOH, Ca (OH) 2), is preferably Selexol and monoethanolamine solution.
Absorption liquid in the described regeneration of absorption solution tower obtains regeneration through heating and the dual processing of air stripping.
The system of carbon dioxide zero discharge type organic waste recovery energy of the present invention, its operating procedure is following:
(1) raw material is collected and preliminary treatment: collect various organic wastes and be stored in the raw material storage pond respectively, utilize pretreatment unit various organic wastes to be carried out preliminary treatment such as removal of impurities, fragmentation, pulverizing, desanding, be crushed to particle diameter≤20mm;
(2) anaerobic fermentation hydrogen manufacturing and hydrogen cleaning: pretreated various organic wastes, product hydrogen inoculum and water are mixed at product hydrogen regulating reservoir, guarantee to get into the material total solid concentration (TS)≤30% of anaerobic hydrogen-generating reactor; The temperature of control anaerobic fermentation hydrogen production reaction is 30~56 ℃, and pH is 4.5~6.5, and residence time of material is 2~5 days; In the anaerobic hydrogen-generating reactor, the effect bottom fermentation that organic waste produces the hydrogen acid-producing bacteria in hydrolysis generates H 2And CO 2, produce the hydrogen residue and get into follow-up marsh gas fermentation process; The H that produces 2And CO 2The CO of admixture of gas in carbon dioxide absorption tower 2The absorption liquid and first moisture trap remove CO respectively 2With the pure hydrogen of acquisition behind the water, be stored in the hydrogen-holder; The CO that reaches capacity 2Absorption liquid obtains regeneration, the CO that from absorption liquid, overflows through heating and the dual processing of air stripping in the regeneration of absorption solution tower 2After the dehydration of second moisture trap, be stored in carbon dioxide storage tank with AIR MIXTURES, so that carried out biological fixation by the little algae in the subsequent technique;
(3) biogas fermentation and marsh gas power generation: produce the hydrogen residue and get into the anaerobism methane-producing reactor with product methane inoculum in product methane regulating reservoir mixing back, under the effect of methanogen, forming methane, (main component is CH 4And CO 2), the temperature of control biogas fermentation is 30~56 ℃, pH is 6.5~7.8,10~30 days time of staying; The residue of accomplishing biogas fermentation is divided into natural pond slag and natural pond liquid after the solid-liquid separating equipment Separation of Solid and Liquid; Be stored in the biogas storage cabinet after the biogas process biogas desulfurization tower desulfurization that produces; This biogas carries out marsh gas power generation through the marsh gas power generation unit; The flue gas that gives off after the marsh gas power generation (being mainly carbon dioxide, air, water vapour) is stored in carbon dioxide storage tank after the condenser condenses dehydration, so that carried out biological fixation by the little algae in the subsequent technique;
(4) natural pond liquid is handled and little algae stabilizing carbon dioxide: the natural pond liquid after Separation of Solid and Liquid contains dissolubility nitrogen, phosphorus, sulphur, inorganic salts, trace element, vitamins and other nutritious components; Direct full nutrient medium as little algae; Natural pond liquid is liquid regulating reservoir and in the mixing pond, mixes the laggard bioreactor of going into through the algae kind inoculation algae liquid that spreads cultivation of jar that spreads cultivation through the natural pond, and utilization comes from the CO of carbon dioxide storage tank 2Be carbon source, carry out with photoautotrophy growth fixation CO 2Little algae of mode is cultivated, and the temperature of controlling little algae cultivation is 20~40 ℃, and intensity of illumination is 1000~8000Lux, the illumination in continuous 24 hours of the sun or artificial light sources, and regulate CO in the AIR Proportional control air inlet 2Concentration is 1%~40%; After the cultivation through 2~4 weeks, algae liquid is transported to air flotation tank carries out the air supporting processing, the raw material that the higher little algae of concentration is starched as anaerobic fermentation hydrogen manufacturing and biogas fermentation is stored in the raw material storage pond; The lower rare algae liquid of concentration is as inoculation algae liquid;
(5) processing of natural pond slag and energy grass planting: the natural pond slag after Separation of Solid and Liquid contains the required nutritional labelings of plant growth such as nitrogen, phosphorus, sulphur, inorganic salts, trace element, vitamin; Dry in fertilizer processing factory, be transported to energy grass planting base after the pulverization process and use as solid organic fertilizer; Natural pond slag moisture content after guaranteeing to dry is 20%~35%, is stored in the raw material storage pond through harvesting energy grass after 2~6 months growth period and as the raw material of anaerobic fermentation hydrogen manufacturing and biogas fermentation;
(6) heat recovery:, and be used for anaerobic hydrogen-generating reactor temperature raising and maintaining, anaerobism methane-producing reactor temperature raising and maintaining, bioreactor temperature raising and maintaining and the oven dry of natural pond slag through a large amount of waste heats of residual neat recovering system recycling step (3) marsh gas power generation generation.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention is with anaerobic fermentation hydrogen manufacturing, biogas fermentation, CO 2Absorption, little algae fixation of C O 2, multinomial technology such as the processing of natural pond liquid, energy grass planting organically combines; They are supported each other; Interdependence; Formed the system of carbon dioxide zero discharge type organic waste recovery energy, this system obtains hydrogen and electricity two kind clean energy resourcies as raw material through anaerobic fermentation technology and biogas power generation technology with organic waste; With the full nutrient medium of natural pond liquid, utilize little algae will follow the CO of hydrogen and electricity generation simultaneously as little algae 2Carry out anchored in place, and with algae bio matter as the production capacity raw material; The fertilizer of natural pond slag as energy grass is used, and with energy grass as the production capacity raw material, realized the resource circulation utilization production capacity of whole system, and outwards do not discharged CO 2Greenhouse gases.Compare with independent anaerobic fermentation hydrogen producing technology, anaerobic fermentation coproduction hydrogen and methane technology have significantly improved energy recovery efficient; Compare marsh gas power generation+CO with independent biogas power generation technology 2Little algae technique for fixing has been avoided CO 2Greenhouse gas emission; With independent little algae fixation of C O 2Compared with techniques, natural pond liquid processing+CO 2Little algae technique for fixing has reduced little algae and has cultivated cost, because the full nutrient medium that utilizes natural pond liquid to cultivate as little algae.
System of the present invention is fit to handle various types of organic wastes; Can be applicable to the industry such as processing and new energy development of agricultural organic waste, industrial organic waste, domestic organic garbage, mud etc.; Through application of the present invention, can implement the concrete application demonstration of recycling economy, when eliminating environmental pollution, obtain clean energy resource; And in this process, do not have greenhouse gas emission, can realize triple effects of offal treatment, clean reproducible energy production, carbon dioxide discharge-reduction.
Description of drawings
Fig. 1 is a system flow sketch map of the present invention
Description of reference numerals: 1-raw material storage pond, the 2-pretreatment unit, 3-produces the hydrogen regulating reservoir, 4-anaerobic hydrogen-generating reactor, 5-produces methane and reconciles the pond; 6-anaerobism methane-producing reactor, 7-solid-liquid separating equipment, 8-natural pond liquid regulating reservoir, 9-mixing pond, 10-bioreactor; 11-air flotation tank, the 12-algae kind jar that spreads cultivation, 13-carbon dioxide absorption tower, 14-regeneration of absorption solution tower; 151-first moisture trap, 152-second moisture trap, 16-carbon dioxide storage tank, 17-hydrogen-holder; 18-biogas desulfurization tower, 19-biogas storage cabinet, 20-marsh gas power generation unit, 21-condenser.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is elaborated.
Embodiment 1:
Referring to Fig. 1; The system of carbon dioxide zero discharge type organic waste recovery energy in the present embodiment; Comprise raw material storage pond 1, pretreatment unit 2, produce hydrogen regulating reservoir 3, anaerobic hydrogen-generating reactor 4, produce that methane reconciles that pond 5, anaerobism methane-producing reactor 6, solid-liquid separating equipment 7, natural pond liquid regulating reservoir 8, mixing pond 9, bioreactor 10, air flotation tank 11, algae kind spread cultivation jars 12, carbon dioxide absorption tower 13, regeneration of absorption solution tower 14, first moisture trap 151, second moisture trap 152, carbon dioxide storage tank 16, hydrogen-holder 17, biogas desulfurization tower 18, biogas storage cabinet 19, marsh gas power generation unit 20, condenser 21, heat recovery system, fertilizer processing space, energy grass planting base, described raw material storage pond 1, pretreatment unit 2, produce hydrogen regulating reservoir 3, anaerobic hydrogen-generating reactor 4, produce methane and reconcile pond 5, anaerobism methane-producing reactor 6, solid-liquid separating equipment 7, natural pond liquid regulating reservoir 8, mixing pond 9, bioreactor 10, air flotation tank 11 and link to each other successively; The gas vent of described anaerobic hydrogen-generating reactor 4, carbon dioxide absorption tower 13, first moisture trap 151, hydrogen-holder 17 link to each other successively; The inlet of described carbon dioxide absorption tower 13 and liquid outlet are communicated with the liquid outlet and the inlet of regeneration of absorption solution tower 14 through pipeline respectively; Regeneration of absorption solution tower 14, second moisture trap 152, carbon dioxide storage tank 16, bioreactor 10 are communicated with through pipeline successively; The gas vent of anaerobism methane-producing reactor 6, biogas desulfurization tower 18, biogas storage cabinet 19, marsh gas power generation unit 20, condenser 21, carbon dioxide storage tank 16 are communicated with through pipeline successively; The algae kind spreads cultivation and jars 12 is communicated with through pipeline with mixing pond 9; The upper and lower of air flotation tank 11 is communicated with through pipeline with raw material storage pond 1 and mixing pond 9 respectively; The heat recovery system links to each other with marsh gas power generation unit 20, anaerobic hydrogen-generating reactor 4, anaerobism methane-producing reactor 6, bioreactor 10 and fertilizer processing space respectively through pipeline; Be used to reclaim the waste heat that marsh gas power generation produces, and dry to the temperature raising and maintaining or the natural pond slag of anaerobic hydrogen-generating reactor 4, anaerobism methane-producing reactor 6, bioreactor 10 and fertilizer processing space heat supply realization response device; Natural pond slag through solid-liquid separating equipment 7 produces is applied to energy grass planting base as solid organic fertilizer after the processing of fertilizer processing space, the energy grass that results obtain is stored in raw material storage pond 1 as fermentation raw material.2 compartments are set in the described raw material storage pond 1; Described pretreatment unit 2 is a disintegrating machine; Described anaerobic hydrogen-generating reactor 4 is respectively plug flow reactor (PFR) and complete mixing reactor (CSTR) with anaerobism methane-producing reactor 6; Described solid-liquid separating equipment 7 is the squash type spiral separator, and described bioreactor is a column formula bioreactor, in described carbon dioxide absorption tower 13, Selexol is housed as carbon dioxide absorption liquid.
For understanding the present invention better, describe in the face of the system's running in the specific embodiment down:
The organic waste of present embodiment is feces of livestock and poultry (pig manure) and agricultural crop straw (rice straw), and little algae is hear resistance chlorella (Chlorella sorokiniana), and energy grass is a hybrid Chinese pennisetum.Its step is following:
(1) raw material is collected and preliminary treatment: pig manure and rice straw are collected respectively and are stored in two compartments in raw material storage pond 1, utilize disintegrating machine 2 that stalk is crushed to particle diameter≤20mm;
(2) anaerobic fermentation hydrogen manufacturing and hydrogen cleaning: the anaerobic activated sludge of gathering methane-generating pit; Heat 60min down as producing the hydrogen inoculum at 80 ℃; Crushed straws and pig manure are transferred to and produce hydrogen regulating reservoir 3; Add to produce the hydrogen inoculum according to 20% of stalk and pig manure gross mass, and adding water, to regulate mixed material total solid concentration (TS) be 30%; Said mixture is transported to anaerobic hydrogen-generating reactor 4 produces the hydrogen fermentation, 56 ℃ of control fermentation temperatures, pH scope 4.5~6.5 after 5 days product hydrogen fermentation, is transported to product methane regulating reservoir 5 with residue; The H that anaerobic fermentation produces 2And CO 2Admixture of gas is transported to carbon dioxide absorption tower 13, absorbs the CO in the mist with Selexol as absorption liquid 2, residue H 2Through being stored in hydrogen-holder 17 after 151 dehydrations of first moisture trap; Absorption liquid reaches capacity after after a while, and will pump it to regeneration of absorption solution tower 14 regenerate this moment, under the condition of boiling, utilize air from regeneration of absorption solution tower 14 bottom stripping absorption liquids with CO 2Make absorption liquid obtain regeneration, CO thereby carry out 2After 152 dehydrations of second moisture trap, be stored in carbon dioxide storage tank 16 with AIR MIXTURES, so that carried out biological fixation by the little algae in the subsequent technique;
(3) biogas fermentation and marsh gas power generation: collection comes from the anaerobic activated sludge of methane-generating pit as producing the methane inoculum; 20% it is added to produce in the methane regulating reservoir 5 and mix by what produce hydrogen residue gross mass; Mixture is transported to anaerobism methane-producing reactor 6 carries out biogas fermentation, the control fermentation temperature is 56 ℃, and pH is 6.5~7.8; Behind 30 days biogas fermentation, utilize 7 pairs of residues of solid-liquid separating equipment to carry out Separation of Solid and Liquid; The biogas that produces (is mainly CH 4And CO 2) through being stored in biogas storage cabinet 19 after 18 desulfurization of biogas desulfurization tower; Generate electricity through marsh gas power generation unit 20 immediately; The flue gas that gives off after the marsh gas power generation (being mainly carbon dioxide, air, water vapour) is stored in carbon dioxide storage tank 16 after condenser 21 dehydrations, so that carried out biological fixation by the little algae in the subsequent technique;
(4) natural pond liquid is handled and little algae stabilizing carbon dioxide: the natural pond liquid after Separation of Solid and Liquid contains dissolubility nitrogen, phosphorus, sulphur, inorganic salts, trace element, vitamins and other nutritious components, can be directly as the full nutrient medium of hear resistance chlorella (Chlorella sorokiniana); The hear resistance chlorella is transported to mixing pond 9 as inoculation algae liquid fully mixes after the algae kind spreads cultivation jar 1 week of 12 cultivations, and mixed liquor is pumped into bioreactor 10 with the natural pond liquid that the liquid regulating reservoir 8 through the natural pond is regulated; Get into from the CO2+ air mixture of carbon dioxide storage tank 16 air inlet from bioreactor 10; Control bioreactor 10 temperature are 20 ℃; Intensity of illumination is 1000~2000Lux, the sun or artificial light sources (using when cloudy day and night) illumination in continuous 24 hours, and regulate CO in the air inlet 2Concentration is 1%; The hear resistance chlorella utilizes natural pond liquid, light and CO respectively in bioreactor 10 2Carry out photoautotrophy growth fixation CO as nutrient source, the energy and carbon source 2And generation algae bio matter; After the cultivation through 4 weeks, algae liquid is transported to air flotation tank 11 from bioreactor 10 carries out the air supporting processing, the raw material that the higher little algae of the little concentration of algae in air flotation tank 11 tops is starched as anaerobic fermentation hydrogen manufacturing and biogas fermentation is transported to raw material storage pond 1; Rare algae liquid of air flotation tank 11 bottoms is back to mixing pond 9 as next the inoculation algae liquid of cultivating batch;
(5) processing of natural pond slag and energy grass planting: the natural pond slag that produces through solid-liquid separating equipment 7 contains the required nutritional labelings of plant growth such as nitrogen, phosphorus, sulphur, inorganic salts, trace element, vitamin; Being transported to the hybrid Chinese pennisetum planting base after in the fertilizer processing space, drying, pulverize uses as solid organic fertilizer; Natural pond slag moisture content after guaranteeing to dry is 20%~35%, through gathering in after 6 months growth period and being stored in raw material storage pond 1 as the raw material of anaerobic fermentation hydrogen manufacturing and biogas fermentation;
(6) heat recovery: a large amount of waste heats that produce when utilizing marsh gas power generation in the heat exchanger recycling step (3), and the heat energy that recovery obtains is used for anaerobic hydrogen-generating reactor 4 temperature raising and maintainings, anaerobism methane-producing reactor 6 temperature raising and maintainings, bioreactor 10 temperature raising and maintainings and the oven dry of natural pond slag.
Use the system of the carbon dioxide zero discharge type organic waste recovery energy of present embodiment,, can when eliminating organic waste, obtain clean energy resource H according to the said process operation 2And electric energy, and in this process, do not have greenhouse gas emission, can realize triple effects of offal treatment, clean reproducible energy production, carbon dioxide discharge-reduction.
At last, it is also to be noted that what more than enumerate only is practical implementation example of the present invention.Obviously, the invention is not restricted to above examples of implementation, many distortion can also be arranged.All distortion that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention all should be thought protection scope of the present invention.

Claims (7)

1. the system of a carbon dioxide zero discharge type organic waste recovery energy; It is characterized in that; Comprise raw material storage pond (1), pretreatment unit (2), produce hydrogen regulating reservoir (3), anaerobic hydrogen-generating reactor (4), produce methane and reconcile pond (5), anaerobism methane-producing reactor (6), solid-liquid separating equipment (7), natural pond liquid regulating reservoir (8), mixing pond (9), bioreactor (10), air flotation tank (11), algae kind spread cultivation jar (12), a carbon dioxide absorption tower (13), regeneration of absorption solution tower (14), first moisture trap (151), second moisture trap (152), carbon dioxide storage tank (16), hydrogen-holder (17), biogas desulfurization tower (18), biogas storage cabinet (19), marsh gas power generation unit (20), condenser (21), heat recovery system, fertilizer processing space and energy grass planting base, described raw material storage pond (1), pretreatment unit (2), produce hydrogen regulating reservoir (3), anaerobic hydrogen-generating reactor (4), produce methane and reconcile pond (5), anaerobism methane-producing reactor (6), solid-liquid separating equipment (7), natural pond liquid regulating reservoir (8), mixing pond (9), bioreactor (10), air flotation tank (11) and link to each other successively; The gas vent of described anaerobic hydrogen-generating reactor (4), carbon dioxide absorption tower (13), first moisture trap (151), hydrogen-holder (17) link to each other successively; The inlet of described carbon dioxide absorption tower (13) and liquid outlet are communicated with the liquid outlet and the inlet of regeneration of absorption solution tower (14) through pipeline respectively; Described regeneration of absorption solution tower (14), second moisture trap (152), carbon dioxide storage tank (16), bioreactor (10) are communicated with through pipeline successively; The gas vent of described anaerobism methane-producing reactor (6), biogas desulfurization tower (18), biogas storage cabinet (19), marsh gas power generation unit (20), condenser (21), carbon dioxide storage tank (16) are communicated with through pipeline successively; The algae kind spreads cultivation jar (12) and mixing pond (9) through the pipeline connection; The upper and lower of air flotation tank (11) is communicated with through pipeline with raw material storage pond (1) and mixing pond (9) respectively; The heat recovery system links to each other with the fertilizer processing space with marsh gas power generation unit (20), anaerobic hydrogen-generating reactor (4), anaerobism methane-producing reactor (6), bioreactor (10) respectively through pipeline; Natural pond slag through solid-liquid separating equipment (7) produces is applied to energy grass planting base as solid organic fertilizer after the processing of fertilizer processing space, the energy grass that results obtain is stored in raw material storage pond (1) as fermentation raw material.
2. the system of carbon dioxide zero discharge type organic waste recovery energy according to claim 1 is characterized in that, in the described raw material storage pond (1) a plurality of compartments is set.
3. the system of carbon dioxide zero discharge type organic waste recovery energy according to claim 1 is characterized in that described pretreatment unit is selected from one or more combinations of grid, disintegrating machine, pulverizer, settling pit.
4. the system of carbon dioxide zero discharge type organic waste recovery energy according to claim 1; It is characterized in that described anaerobic hydrogen-generating reactor (4) or anaerobism methane-producing reactor (6) are plug flow reactor, fully mixing reactor, anaerobism contact reactor, upflow anaerobic sludge blanket process, up-flow solid reactor, expanded granular sludge bed, internal-circulation anaerobic reactor, outer circulation anaerobic reactor, anaerobic batch reactor, baffled reactor, anaerobic filter, fiberfill bed, hybrid anaerobic reactor, anaerobic fluidized bed, anaerobic expanded bed or dried fermentation reactor.
5. the system of carbon dioxide zero discharge type organic waste recovery energy according to claim 1; It is characterized in that described solid-liquid separating equipment (7) is selected from one or more combinations of squash type spiral separator, horizontal centrifugal separator, supercentrifuge, filter, micro-filtration, ultrafiltration apparatus.
6. the system of carbon dioxide zero discharge type organic waste recovery energy according to claim 1 is characterized in that described bioreactor (10) is a closed photo bioreactor.
7. the system of carbon dioxide zero discharge type organic waste recovery energy according to claim 6; It is characterized in that described closed photo bioreactor is column formula bioreactor, tubular type bioreactor, board-like bioreactor, built-in light-source fermentation pot type bioreactor or optical fiber bioreactor.
CN2010102324168A 2010-07-20 2010-07-20 Energy utilization system of organic wastes with zero emission of carbon dioxide CN101920258B (en)

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