CN107927346A - A kind of rubbish landfill gas collecting carbonic anhydride couples microalgae carbon sequestration technique - Google Patents

A kind of rubbish landfill gas collecting carbonic anhydride couples microalgae carbon sequestration technique Download PDF

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Publication number
CN107927346A
CN107927346A CN201711414054.2A CN201711414054A CN107927346A CN 107927346 A CN107927346 A CN 107927346A CN 201711414054 A CN201711414054 A CN 201711414054A CN 107927346 A CN107927346 A CN 107927346A
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gas
column
carbon dioxide
landfill
landfill gas
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杨正山
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    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23KFODDER
    • A23K10/00Animal feeding-stuffs
    • A23K10/30Animal feeding-stuffs from material of plant origin, e.g. roots, seeds or hay; from material of fungal origin, e.g. mushrooms
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/22Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
    • B01D53/225Multiple stage diffusion
    • B01D53/226Multiple stage diffusion in serial connexion
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/22Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
    • B01D53/228Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion characterised by specific membranes
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C7/00Purification; Separation; Use of additives
    • C07C7/005Processes comprising at least two steps in series
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2256/00Main component in the product gas stream after treatment
    • B01D2256/22Carbon dioxide
    • 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
    • Y02CCAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C20/00Capture or disposal of greenhouse gases
    • Y02C20/40Capture or disposal of greenhouse gases of CO2
    • 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
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00Technologies for the production of fuel of non-fossil origin
    • Y02E50/30Fuel from waste, e.g. synthetic alcohol or diesel
    • 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
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/10Process efficiency
    • Y02P20/129Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
    • 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
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/151Reduction of greenhouse gas [GHG] emissions, e.g. CO2
    • 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
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/50Improvements relating to the production of bulk chemicals
    • Y02P20/54Improvements relating to the production of bulk chemicals using solvents, e.g. supercritical solvents or ionic liquids

Abstract

The invention discloses a kind of rubbish landfill gas collecting carbonic anhydride to couple microalgae carbon sequestration technique, and the technique is formed by filling factory's column, landfill gas methane purification column, landfill gas post combustion carbon dioxide film trapping column and microalgae carbon sequestration column;Methane is implemented to separate with carbon dioxide by film separation system, lifts methane component concentration in landfill gas;The flue gas that landfill gas combustion power generation after purification methane component concentration produces through membrane separation-low-temperature deep mixing trapping technique obtain supercritical carbon dioxide and landfill gas methane purify column supercritical carbon dioxide mix after, a part provides extractant for lipids extraction link, and retention gas provides carbon source for microalgae carbon sequestration column;Microalgae carbon sequestration column makes full use of landfill factory site space of planes, extract the feed as livestock after the microalgae particle after lipid is processed, the excrement of livestock is used for lifting the content of organic matter in waste component, lifts the yield of landfill gas, lipid converted products further improves the economic benefit of technique.

Description

A kind of rubbish landfill gas collecting carbonic anhydride couples microalgae carbon sequestration technique
Technical field
The present invention relates to collecting carbonic anhydride energy-conserving and emission-cutting technology field, more particularly to a kind of garbage loading embeading air carbon dioxide Trapping coupling microalgae carbon sequestration technique.
Background technology
Since the industrial revolution, a large amount of burnings of fossil fuel cause atmospheric carbon dioxide levels rapidly to rise, with dioxy The discharge for changing the greenhouse gases based on carbon result in the rising for becoming warm sea level of global climate.The inter-governmental weather of the United Nations becomes Change special commission(IPCC)Pointed out in the Fourth Assessment Report, in total warming effect of greenhouse gases, carbon dioxide contribution 63% is accounted for, methane contribution accounts for 18%, and the greenhouse gas emission of methane per ton is 25 times of CO2 equivalent.Although titanium dioxide It is more long-range that carbon influences, but it is crucial to be intended to quick mitigation of climate change control discharge of methane;Mankind's activity discharge Methane accounts for 60% or so of global discharge of methane, and wherein discharge of methane caused by agricultural production accounts for about the three of artificial discharge of methane and divides One of, discharge of methane takes second place caused by fossil fuel, such as in U.S.'s rubbish landfill gas is the 3rd discharge of methane source of methane.
Rubbish landfill gas generally has 50% methane and 50% carbon dioxide and a small amount of non-methane organic compound gas group Into refuse landfill using different phase of the country variant in different latitude, the city of different economic development levels produces There are certain difference for gas component in landfill gas.Since the 21th century, Chinese Urbanization speed is accelerated, urban-rural integration Quickly grow, the house refuse amoun of resident gradually increases, and the quantity of refuse landfill is being continuously increased, due in rubbish landfill gas Methane containing higher concentration, if without processing the health of the fire crisis people may be triggered also to pollute sky Gas, is directly discharged to increase in air the greenhouse effects in the whole world.
Methane component in landfill gas is a kind of valuable clean energy resource, and pure methane gas has very high calorific value, still Landfill gas calorific value only has the general left and right of methane;It can will be used for preparing compressed natural gas after the methane component purification in landfill gas With liquefied natural gas or generate electricity, reduce the pollution to air, reduce the greenhouse gas emission equivalent of landfill factory.
It can be conserved water and soil after the closing of garbage loading embeading factory by vegetation, reduce moisture penetration to filling in factory, increase is green The area coverage of plant can purify air, and the greenhouse gas emission that landfill factory is reduced by photosynthesis absorbing carbon dioxide is worked as Amount.
Microalgae can discharge oxygen and organic matter while fixing carbon dioxide by using photosynthesis, and organic matter can be used To be processed into the products such as biodiesel, alleviate the demand to fossil energy;Since the ratio surface of microalgae is big, photosynthetic efficiency ratio Vegetation it is big, oil productivity is higher than the oil-producing crop such as corn and soybean, peanut, sunflower, rapeseed;Extract organic matter microalgae Can be as the feed and coal alternative fuel of animal rich in organic matter and carbon in grain.
Bioenergy is captured with carbon and storing technology (BECCS) is a kind of very effective Technology of Reducing Greenhouse Gas Emissions, should Technology combines carbon capture and storage (CCS) and biomass energy uses process, it is possible to achieve negative carbon emission.Two in rubbish landfill gas The gas concentration lwevel that the concentration of component of carbonoxide is discharged than existing coal-burning power plant, steel plant and cement plant in flue gas is high, phase The trapping difficulty answered is relatively low, and trapping carbon dioxide process can lift the utility value of methane in rubbish landfill gas.
Mainly there are solvent absorption, absorption method, membrane separation process, low-temperature deep partition method in collecting carbonic anhydride technology at present Deng alcohol amine absorption process is most widely used at present, but there are absorbent regeneration temperature is higher, required energy consumption is larger, chemical absorbing The leakage or volatilization of agent can cause the pollution of environment.Membrane separation process is with its is easy to operate, floor space is small, energy consumption is low, without phase-change The advantages of, have great application prospect;But when the pressure of flue gas is smaller, gas concentration lwevel is relatively low, it is necessary to utilize pressure Contracting machine is pressurized for flue gas, lifting trapping effect, when purity meets to be not less than 95%, with the film surface needed for the increase of capture rate The energy consumption of the equipment such as product and compression will also increase therewith, this is the current principal element for hindering membrane separation process commercial Application.
Therefore, a kind of film trapping technique is studied to trap carbon dioxide in landfill gas, purifies methane component in landfill gas Concentration, increases the calorific value of landfill gas, lifts the effect of landfill gas combustion power generation, the smoke carbon dioxide carbon trapping discharged after burning During, ensureing that trapping purity is not less than 95%, by reduce film trapping technique trapping capture rate to reduce the energy of technique Consumption and trapping difficulty, increase the economic benefit of system entirety, are highly important for promoting global carbon emission reduction.
The content of the invention
The object of the present invention is to provide a kind of rubbish landfill gas collecting carbonic anhydride to couple microalgae carbon sequestration technique, utilizes landfill The land resource of factory provides the place of breeding for microalgae carbon sequestration, and increasing organic matter in landfill factory waste component using excrement of animals contains Amount;By landfill gas post combustion carbon dioxide using UF membrane-low-temperature deep mixing trapping technique, landfill gas membrane separation technique and Microalgae carbon-fixation-technology is effectively integrated;Methane component is purified for rubbish landfill gas using membrane separation technique, by using filling out Gas combustion power generation is buried, carbon dioxide is trapped by using UF membrane-low-temperature deep mixing trapping technique and microalgae carbon-fixation-technology, Raising system reduction of greenhouse gas discharge effect, reduces energy consumption;The economy of trapping system is improved using microalgae carbon sequestration product.
Technical solution provided by the invention is as follows:A kind of rubbish landfill gas collecting carbonic anhydride couples microalgae carbon sequestration technique, Step is as follows:In landfill factory column, the excrement from livestock lifts the content of organic matter for waste component, improves the aerogenesis of landfill gas Effect;Landfill factory site table provides the space of arrangement for microalgae carbon sequestration column, improves space availability ratio.
Purify column in landfill gas methane, rubbish landfill gas by desulfurization, it is dry after, then through overcompression, cooling, drying, By 2 grades of film separation systems by carbon dioxide and methane separation, the carbon dioxide gas obtained in the infiltration gas of the 2nd grade of membrane module Body, through being overpressurized, Multi-stage cooling, dehydration, obtains liquid CO 2 after liquefaction, overcritical titanium dioxide is obtained after increasing temperature and pressure Carbon;The methane of high concentration and the gaseous mixture of carbon dioxide are obtained in retention gas, purifies the rubbish landfill gas conduct after methane component The fuel of landfill gas post combustion carbon dioxide film trapping column carries out combustion power generation.
Column is trapped in landfill gas post combustion carbon dioxide film, the flue gas after denitration process is through being overpressurized, multistage After cooling, drying, the carbon dioxide in flue gas is trapped using 2 grades of membrane separation techniques, permeates in gas and obtains in the 2nd grade of membrane module Carbon dioxide purity is not less than 95% gas component, through being overpressurized, Multi-stage cooling, dehydration, obtains liquid titanium dioxide after liquefaction Carbon, obtains supercritical carbon dioxide after increasing temperature and pressure;Carried using the carbon dioxide for retaining low concentration in gas for microalgae carbon sequestration column For carbon source, heat recovery link can provide institute's calorific requirement for micro-algae propagation temperature adjustment link.
In microalgae carbon sequestration column, the flue gas from landfill gas post combustion carbon dioxide film trapping column by expansion decompression, After temperature adjustment, into microdisk electrode link, processed afterwards by being dehydrated link, pretreatment link, lipids extraction link, lipid Link;Carried in the extractant of lipids extraction link by the supercritical carbon dioxide of landfill gas post combustion carbon dioxide film trapping column For realizing that the microalgae particle of generation is domestic animal after processing together with the extraction of lipid is effectively integrated with the separation of microalgae powder Poultry provides feed, and the economic benefit and environmental benefit of different product increase technique can be obtained after lipid processing.
Brief description of the drawings
The present invention will be described in more detail with specific embodiment below in conjunction with the accompanying drawings:Fig. 1 is the rubbish of the present invention The a kind of of rubbish landfill gas collecting carbonic anhydride coupling microalgae carbon sequestration technique implements structure diagram.
Attached figure label explanation:1st, garbage loading embeading factory;2nd, landfill gas exclusion device;3rd, 10,22,30, compressor;4、11、 15th, 16,19,23,24,31,35,36,42, heat exchanger;5th, 25, gas-liquid separator;6th, 26,37,3A molecular sieve drying devices;7、 25th, gas mixer;8th, 12,28,32, membrane module;9th, 13,29,33, vacuum pump;14th, 34, compound compressor;17th, 39, liquid Body pumps;18th, 41, expanding machine;20th, landfill gas combustion power generation device;21st, waste-heat recovery device;38th, LNG heat exchangers;40th, liquefy Natural gas storage tank;43rd, Photoreactor;44th, microalgae solution dehydrates device device;45th, pretreatment unit is extracted;46th, lipid extraction fills Put;47th, algae powder processing unit (plant);48th, lipid processing unit (plant);49th, agent storage device is extracted;50th, livestock;51st, liquid mixer.
Embodiment
It is required attached in being described below in conjunction with prior art in order to better illustrate the existing technical solution of the present invention Figure is described in detail.
With reference to Fig. 1, a kind of rubbish landfill gas collecting carbonic anhydride of the invention coupling microalgae carbon sequestration technique includes:Fill factory Column, landfill gas methane purification column, landfill gas post combustion carbon dioxide film trapping column and microalgae carbon sequestration column;Microalgae carbon sequestration Column is installed on the earth's surface of landfill factory, increases space availability ratio, enters landfill factory by S1 in landfill factory's column waste component, comes The metabolins such as the excrement produced from livestock are entered in the landfill factory 1 to close by S2, seal the organic matter warp in factory is filled up for safekeeping Generation landfill gas enters in landfill air purifying apparatus 2 by S3 after crossing anaerobic fermentation;Enter after landfill gas purification by S4 and compress Machine, landfill gas increase heating after exchanged heat by S5 and heat exchanger 4, after water-cooled cooling by S6 with 5 phase of gas-liquid separator Even, preliminary hydro-extraction operation is carried out.
In gas separator 5, obtained liquid enters circulation by S8, and the landfill gas after preliminarily dried is passed through S7 is connected with 3A mole sieve driers 6, and dried landfill gas is entered in gas mixer 7 by S9, and from membrane module 12 After the gas mixing of middle retention gas, entered by S10 in membrane module 8.
The charging gas side of membrane module 8 is connected with S10, and retention gas side is connected with S11, and retention gas is returned by 18 energy of expanding machine Enter landfill gas post combustion carbon dioxide film trapping column by S23 after receipts;Infiltrating gas side is connected with S12, in the pumping of vacuum pump 9 The lower infiltrating gas side of suction effect passes through S13 after selling of one's property atmospheric pressure from negative pressure and enters in compressor 10, and the flue gas after supercharging heating needs To cool down by S14 in heat exchanger 11, the infiltration gas after cooling enters membrane module 12 by S15.
The charging gas side of membrane module 12 is connected with S15, and retention gas side is connected with S16, is then refluxed for gas mixer device 7 In;Infiltrating gas side is connected with S17, and under the swabbing action of vacuum pump 13, the separating property increase of membrane module, infiltration gas is in vacuum The pressure of pump air outlet side returns to atmospheric pressure, is then connected by S18 with compound compressor 14;Cigarette after multi-stage compression Gas satisfaction corresponding temperature after the cooling of heat exchanger 16 meets the pressure requirements of liquid CO 2, and the infiltration gas of high temperature and pressure is first Tentatively cooled down using water cooling in heat exchanger 15 by S19, then further cooled down in heat exchanger 16 by S20;Heat exchange The natural gas that the cryogenic energy of device 16 is trapped low temperature in column by landfill gas post combustion carbon dioxide film provides;The titanium dioxide of liquid Carbon is connected by S21 with liquid pump 17, pressure needed for commercial use is pressurized in liquid pump 17, then by S22 with coming from The liquid carbon dioxide of landfill gas post combustion carbon dioxide film trapping column is uniformly mixed in liquid mixer 51 enters business Purposes link.
Landfill gas post combustion carbon dioxide film trap column, from membrane module 8 purification after landfill gas first pass through S23 into Enter in heat exchanger 19, adjusted using recirculated water to preference temperature;Landfill gas after heating enters landfill gas burning hair by S24 In electric installation 20, required air enters source landfill gas combustion power generation device 20 by S25, has been utilized the liquefaction of cryogenic energy Natural gas enters landfill gas combustion power generation device 20 as one of fuels sources by S26;Landfill gas after purification is low with having utilized First passed through after the liquefied natural gas combustion power generation of warm energy
Denitration process, is then entered in waste-heat recovery device 21 by S27.
After flue gas energy recovery, entered by S28 in compressor 22, flue gas first passes through S29 and exchanging heat after being pressurized heating Device 23 cools down, and then cools down by S30 in heat exchanger 24, and heat exchanger 23 utilizes circulating water cooling, and heat exchanger 24 utilizes low temperature Liquefied natural gas cools down;Flue gas after the cooling of two steps enters in gas-liquid separator 25 by S31;In gas-liquid separator 25, point From water by S33 into system water circulate;Dried flue gas is entered in 3A mole sieve driers 26 by S32, further It is connected after the completion of drying by S34 with gas mixer 27, film is entered by S35 after gas mixes with being retained in membrane module 32 Component 28.
The charging gas side of membrane module 28 is connected with S35, and retention gas side is connected with 36, then by 41 energy regenerating of expanding machine Enter microalgae carbon sequestration column afterwards;Infiltrating gas side is connected with S37, and the flue gas of infiltrating gas side is carried into the swabbing action for crossing vacuum pump 29 Risen infiltration gas in carbon dioxide component separating effect, gas concentration lwevel lifting after vacuum pump air outlet side pressure Recover atmospheric pressure, be then connected by S38 with compressor 30, the charging gas side of temperature membrane module 32 is connected with S40, retains gas side It is connected with S42;Infiltrating gas side is connected with S41, and gas concentration lwevel in gas is permeated under the swabbing action of vacuum pump 33 and is met not Requirement less than 95%, carbon dioxide the gas outlet of vacuum pump 33 pressure recover atmospheric pressure, then by S43 into Enter compound compressor, pressure meets the pressure needed for respective liquid carbon dioxide after the cooling of LNG heat exchangers 38;Add by multistage High temperature and pressure carbon dioxide after pressure tentatively cools down by S44 in heat exchanger 35, then by S45 in heat exchanger 36 Second is carried out to cool down;Heat exchanger 35 uses water-cooled cooling, and heat exchanger 36 is cooled down using low temperature liquid carbon dioxide;After cooling Carbon dioxide is carried out dehydrating by S45 into 3A mole sieve driers.Elevated flue gas is into S39 excessively in heat exchanger 31 Middle to use water-cooled cooling, the flue gas after cooling enters in membrane module 32 by S40.
Dried carbon dioxide is entered in LNG heat exchangers 38 by S47, low temperature liquid carbon dioxide is obtained, by S48 Required pressure is pressurized into liquid pump 39, then entering liquid after S49 provides cryogenic energy for heat exchanger 36 mixes In device 51;The cryogenic energy of LNG heat exchangers 38 is provided by the liquefied natural gas in LNG tank 40 by S51, is obtained Cryogenic natural gas to be followed successively by heat exchanger 16 and heat exchanger 24 to provide cryogenic energy finally by S26 by S52 be landfill gas combustion Burn power generator and fuel is provided.
In microalgae carbon sequestration column, come from retention gas in membrane module 28 and heated up by S54 in heat exchanger 42, temperature It is connected after the completion of adjusting by S55 with Photoreactor 43;In Photoreactor 43, microalgae is bred, and is consolidated using photosynthesis Determine the carbon dioxide synthesis of organic substance in flue gas and discharge oxygen at the same time, need to extract organic matter after cultivating some cycles, Therefore it is introduced into microalgae solution dehydrates device device 44 by S56, is still contained after being separated in microalgae solution dehydrates device 44 Substantial amounts of moisture is further handled and could extracted, it is necessary to is transported to by S57 in extraction pretreatment unit 45;It is pre- in extraction In processing unit 45, microalgae by clasmatosis, exsiccation, crush and etc. obtain microalgae powder, the S56 that went forward side by side enter lipid extraction Take in device 46.
In lipid extraction link, column or landfill gas methane purification column are trapped from landfill gas post combustion carbon dioxide film Supercritical carbon dioxide by S66 enter extraction agent storage device 49 in, in agent storage device 49 is extracted, overcritical dioxy Change carbon and be adjusted to pressure and temperature needed for extraction, then provide extractant by S65 for lipid extraction device 46.
The lipid that lipid extraction device 46 obtains by S59 enter lipid processing unit (plant) 48 in, obtain product by S60 into Row commercial use utilizes the economic benefit for increasing system;Obtained microalgae particle enters in algae powder processing unit (plant) 47 by S61, domestic animal Raise other components needed for feed by S62 to enter in algae powder processing unit (plant) 47, livestock is supplied by S63 by microalgae particle preparation feed 50 is edible;The metabolins such as the excrement that livestock edible feed produces enter after being connected by S64 with S2 in landfill factory 1.

Claims (3)

1. a kind of rubbish landfill gas collecting carbonic anhydride couples microalgae carbon sequestration technique, it is characterised in that:By filling factory's column, landfill Gas methane purification column, landfill gas post combustion carbon dioxide film trapping column and microalgae carbon sequestration column composition;Factory's column is being filled, By being used to collect landfill gas in facilities such as the multiple snorkels of landfill factory installation, while there are other landfill factory and office in filling rubbish The stage that rubbish is not turned off;Purify column in landfill gas methane, rubbish landfill gas by desulfurization, it is dry after, then through overcompression, drop Temperature, drying, by 2 grades of film separation systems by carbon dioxide and methane separation, two obtained in the infiltration gas of the 2nd grade of membrane module Carbon oxide gas, through being overpressurized, Multi-stage cooling, dehydration, obtain liquid CO 2 after liquefaction, are obtained after increasing temperature and pressure overcritical Carbon dioxide;The methane of high concentration and the gaseous mixture of carbon dioxide are obtained in retention gas, purifies the garbage loading embeading after methane component Gas carries out combustion power generation as the fuel of landfill gas post combustion carbon dioxide film trapping column;In landfill gas post combustion carbon dioxide Film traps column, flue gas after denitration process is through being overpressurized, Multi-stage cooling, it is dry after, caught using 2 grades of membrane separation techniques Collect the carbon dioxide in flue gas, the gas group for obtaining carbon dioxide purity and being not less than 95% is permeated in gas in the 2nd grade of membrane module Point, through being overpressurized, Multi-stage cooling, dehydration, liquid CO 2 is obtained after liquefaction, overcritical titanium dioxide is obtained after increasing temperature and pressure Carbon;Carbon source is provided for microalgae carbon sequestration column using the carbon dioxide for retaining low concentration in gas, heat recovery link can be Micro-algae propagation temperature adjustment link provides institute's calorific requirement;In microalgae carbon sequestration column, caught from landfill gas post combustion carbon dioxide film Collect the flue gas of column after expansion decompression, temperature adjustment, into microdisk electrode link, afterwards by being dehydrated link, pretreatment Link, lipids extraction link, lipid processing link;Can be by landfill gas post combustion carbon dioxide in the extractant of lipids extraction link The supercritical carbon dioxide that film trapping column obtains provides, and realizes and effectively integrates the extraction of lipid and the separation of microalgae powder one Rise, extract the feed resource as livestock after the microalgae particle after lipid is processed, the economic effect of lipid converted products increase technique Benefit.
2. landfill factory according to claim 1 column, it is characterised in that:Microalgae carbon sequestration column is installed on the ground of landfill factory On, soil space utilization ratio is added, reduces the expense using the common soil of other equal areas;With the microalgae after processing After grain provides feed for livestock, the excrement that livestock produces fills together with rubbish, lifts the content of organic matter in waste component, improves The aerogenesis effect of landfill gas.
3. landfill gas post combustion carbon dioxide film according to claim 1 traps column, it is characterised in that:Landfill gas is burnt Through excess pressure and temperature after the liquid carbon dioxide mixing that carbon dioxide membrane trapping column and landfill gas methane purification column obtain afterwards Supercritical carbon dioxide, which is obtained, after degree adjustment provides extractant for the lipids extraction link of microalgae carbon sequestration column.
CN201711414054.2A 2017-12-25 2017-12-25 A kind of rubbish landfill gas collecting carbonic anhydride couples microalgae carbon sequestration technique Pending CN107927346A (en)

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CN111871146A (en) * 2020-07-16 2020-11-03 中国能源建设集团广东省电力设计研究院有限公司 Carbon dioxide capture system based on coupling membrane separation method and adsorption method
IT201900018512A1 (en) * 2019-10-10 2021-04-10 Ab Impianti Srl Plant and method for separating a gas mixture containing a plurality of components, in particular for obtaining biomethane

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