CN110446688A - Biogas solidifies preprocess method - Google Patents
Biogas solidifies preprocess method Download PDFInfo
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- CN110446688A CN110446688A CN201880000474.2A CN201880000474A CN110446688A CN 110446688 A CN110446688 A CN 110446688A CN 201880000474 A CN201880000474 A CN 201880000474A CN 110446688 A CN110446688 A CN 110446688A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation 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
- B01D53/02—Separation 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 adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation 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 adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/047—Pressure swing adsorption
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation 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
- B01D53/14—Separation 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 absorption
- B01D53/1487—Removing organic compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/10—Inorganic absorbents
- B01D2252/103—Water
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/104—Alumina
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/116—Molecular sieves other than zeolites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2256/00—Main component in the product gas stream after treatment
- B01D2256/24—Hydrocarbons
- B01D2256/245—Methane
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/304—Hydrogen sulfide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/50—Carbon oxides
- B01D2257/504—Carbon dioxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/80—Water
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Abstract
The present invention relates to a kind of biogas to solidify preprocess method, it removes moisture, siloxanes, sulfide, vegetable oil and volatile organic compounds contained in the biogas in organic waste by anaerobic digestion generation, and including using the compression step compressed with the oilless (oil free) compressor of water lubrication to biogas.
Description
Technical field
The present invention relates to a kind of biogas to solidify preprocess method, removes in organic waste through anaerobic digestion generation
Moisture, siloxanes contained in biogas, sulfide, vegetable oil and volatile organic compounds, and in particular to one kind includes using
Solidify pretreatment side with biogas of oil-free (the oil free type) compressor of water lubrication to the compression step that biogas is compressed
Method.
Background technique
In the high country of the overseas dependency degree of energy supply as South Korea, unstable for energy supply and demand, the country can
The exploitation of the new renewable sources of energy of allotment is in very urgent situation.Therefore, between past many decades, South Korea has been put into largely
Financial resources be dedicated to the exploitations of the new renewable sources of energy.
In the so increased situation of exploitation necessity of the new renewable sources of energy, in the world for organic waste energy
Attention rate increases, especially higher and higher to the attention rate of organic waste biogas.
In particular, a large amount of discharge diet water class wastes in the national ground of South Korea, livestock waste and sewage sludge etc. are various to be had
Machine waste, before for waste policy concern generate waste processing, with treatment facility improper management and
The generation of stench and pollutant causes pollution and environmental problem, the negative cognition and local resident for inducing local resident think ring
Border infrastructure is that the vicious circle of facility is detested to recur, and shows as such as " neighbour keeps away (NIMBY) phenomenon " having to produce
The problem of contradiction element of the self-interested social problems in area and policy.
Then, mode is converted to organic waste from the idea of simple process and physics recycling all the time by Korean government
The policy of gurry energy, to promote effective and efficient offal treatment and energy cause, to be national economy and ring
Border protection contributes, and has put into a large amount of moneys in the waste resource energy technological development including organic waste resource
Gold.
However, by taking South Korea as an example, the energy of the anaerobic biogas generated from the anaerobic digesters such as nearest sewage farm
From the point of view of changing status, most of digester, which also rests on, takes heating, carry out simple burning disposal using biogas or be used for boiler,
The level of fuel used to generate electricity.
It because of such as sewage farm, livestock products fecaluria, food refuse, butchers residue organic waste and is in anaerobic state, i.e.,
By anaerobism (Anaerobic) digest, constitute 45%~60% methane, 25%~50% carbon dioxide, 0~10% nitrogen
(N2) and micro sulfide, siloxanes and ammonia biogas, other than the main component namely for methane of the biogas, comprising dislike
The various volatile organic compounds such as sordes matter sulfide (VOC) and impurity, when leading to influence to ambient enviroment, fuel utilization
The problems such as to the burn into inefficiency of equipment, needs to carry out proper treatment to this.
Therefore, in order to using anaerobic biogas as natural gas vehicle alternative fuel, city gas alternative fuel, it is new again
The substitute gas fuel of the supplies such as raw energy cause, fuel cell cause is utilized, and should be had and is able to produce first in biogas
Alkane purity is up to the high-purity biological methane refining facility of 95% or more biogas, and ensures corresponding technical strength.
With the increase in recent world wide to new renewable sources of energy attention rate, the foreign technology of biogas utilization is ensured
High-purity methane production technology enters the new renewable sources of energy industry that high-purity methane is utilized by reforming, but domestic reality
The level that feelings as previously mentioned, rest on so far are simply burned using biogas, boiler oil etc. simply utilizes, therefore for
Go removing carbon dioxide, nitrogen biogas curing method and to remove sulphide removal, siloxanes, vegetable oil and other organic compounds etc. micro-
The investment that the biogas of amount impurity solidifies preprocess method is urgent.
It is as in the present invention to mention especially as the process before the biogas curing method for being applicable in removing carbon dioxide, nitrogen
The removal efficiency of high carbon dioxide etc., and be applicable in use and remove sulphide removal, siloxanes, vegetable oil and other volatile organics
Close the compressor of the oil-free water lubrication of trace impurities such as object biogas solidify the process of preprocess method almost without.
In KR published patent the 10-2011-0015507th, also only in the biogas curing method for removing removing carbon dioxide
In be applicable in diving screw compressor.
Moreover, completely dispensing with the oil-free (Oil of oil as the air compressor solidified preprocess method suitable for biogas
Free Type) air compressor is most ideal, but in order to be applicable in the air compressor, needs to increase the substance in removal biogas
Pretreatment facility, when producing facility operation maintenance management expense increase the problem of, biogas with saturation moisture condition supply, because
There are corrosive substance, condensed water is generated in air compressor, corrosive substance is dissolved in condensed water, becomes sour component, is produced
The problem of raw air compressor casing damage.
To solve the above-mentioned problems, using having oil lubricating compressor with oil lubrication in the facility of part, to prevent air pressure
The corrosion of contracting machine.But the oil is discharged together with biogas from compressor, pollutes adsorbent and filtering in Biological Pretreatment facility
Film needs to increase filtering and adsorbent.
And for anaerobic digestion facility, in order to which gas occurrence quantity increases and improve operational efficiency, have centainly to compare
The trend that rate is run after being mixed with food waste object shows vegetable oil (cymene, Limonene for food
Deng) the high feature of impurity, the substance cannot be removed in the facility using oil strainer, in order to remove the substance, need to be adopted
Use adsorption system.The content of substance described in biogas causes to increase using operating cost when adsorbent between 100~1,000ppm
The problem of adding, so that pressure-variable adsorption process (PSA) and the operational efficiency of film facility reduce.
Summary of the invention
Technical problem
Project to be solved by this invention is to provide a kind of biogas solidification preprocess method, as applicable removal dioxy
Process before changing the biogas curing method of carbon, nitrogen removes sulphide removal, silicon oxygen for improving the removal efficiency of carbon dioxide etc.
The trace impurities such as alkane, vegetable oil and other volatile organic compounds.
Also, project to be solved by this invention is, in biogas solidification preprocess method, in order to solve as described above
The problem of, oil is replaced using water in compression step, to avoid as lubricant leading to oil to adsorbent and film table
The pollution in face is eliminated and increases filter and adsorbent, so that biogas implants oil is dissolved in the water and is discharged with condensed water, to subtract
Operating load amount in few subsequent foreign matter removal step.
Also, another project to be solved by this invention is, provides using water and replaces oil, reduces the fortune of compression step
Trip temperature generates condensed water in compression step and removes the condensed water of generation together with the water of investment.
Technical means to solve problem
In order to realize that the above subject, the present invention provide a kind of biogas solidification preprocess method, remove in organic waste
Moisture, siloxanes, sulfide, vegetable oil and volatile organic compounds contained in the biogas generated by anaerobic digestion, and
Including using the compression step compressed with the oilless (oil free) compressor of water lubrication to biogas.
Also, biogas solidification preprocess method is characterized in that compressor used in the compression step is screw
Compressor.
Also, biogas solidification preprocess method is characterized in that, before the compression step, further includes: whipping step,
The biogas of supply and water are put into and are stirred into blender；And investment step, the biogas of the stirring and water are put into
To in the compressor.
Also, biogas solidification preprocess method is characterized in that, after the compression step, further includes: separating step,
The biogas and water that are discharged from the compressor are separated；And drain step, to 20% of the water total weight after separation
~40% is drained.
Also, biogas solidification preprocess method be characterized in that, the pressure compressed in the compression step be 7~
10barg。
Also, biogas solidification preprocess method is characterized in that, is further included putting into step again, will be arranged in the drain step
It is remaining after out to be water-cooled to 20~40 DEG C, and put into again after being filtered into the compressor.
Also, biogas solidification preprocess method is characterized in that, further includes: cooling step, by the separating step points
From biogas be cooled to 5~20 DEG C；Condensed water removes step, generates in removal biogas cooling in the cooling step cold
Condensate；Moisture removal step, using moisture filter, the moisture filter is for removing in condensed water removal step
Remove moisture remaining in the biogas of condensed water；And foreign matter removal step, using absorption drier, the absorbed type drying
Machine is used to remove the moisture of micro residue, siloxanes, sulfide, vegetable oil in the biogas Jing Guo the moisture removal step and waves
Hair property organic compound.
Also, biogas solidification preprocess method is characterized in that the absorption type used in the foreign matter removal step is dry
Dry machine includes boulder bed, active oxidation aluminium layer, molecular sieve layer and active carbon layer.
Also, biogas solidification preprocess method is characterized in that the absorption drier is sequentially filled ovum by layer on
Rock layers, active oxidation aluminium layer, molecular sieve layer, active carbon layer, boulder bed.
Invention effect
The present invention is provided as the process before the biogas curing method for being applicable in removing carbon dioxide and nitrogen for improving
The removal efficiency of carbon dioxide etc. removes the micro of sulphide removal, siloxanes, vegetable oil and other volatile organic compounds etc.
The biogas of impurity solidifies preprocess method.
In biogas preprocess method of the invention, in compression step, water is used to replace oil as lubricant, to avoid
Oil will be used to lead to pollution to adsorbent and film surface as lubricant, increase filter and adsorbent is eliminated, make biogas interplantation
Object oil is dissolved in the water and is discharged with condensed water, to reduce the operating load amount in subsequent foreign matter removal step.
Also, by replacing oil with water, the running temperature of compression step is reduced, generates condensed water simultaneously in compression step
The condensed water of generation can be removed together with the water of investment.
Detailed description of the invention
Fig. 1 is the block diagram for schematically illustrating the biogas preprocess method of one embodiment of the invention；
Fig. 2 is the process chart for schematically illustrating the biogas preprocess method of one embodiment of the invention；
Fig. 3 is the schematic diagram for schematically illustrating the structure of absorption drier of one embodiment of the invention.
Description of symbols
S1: whipping step S2: investment step
S3: compression step S4: separating step
S5: step drain step S6: is put into again
S7: cooling step S8: condensed water removes step
S9: moisture removal step S10: foreign matter removal step
1: blender 2: investment valve
3: with the oilless (oil free) compressor 4 of water lubrication: water storagetank is discharged
5: drain valve 6: putting into valve again
7: the first coolers 8: filter
9: the second coolers 10: condensed water storagetank
11: moisture filter 12: absorption drier
121: boulder bed 122: active oxidation aluminium layer
123: molecular sieve layer 124: active carbon layer
125: boulder bed
The embodiment of invention
The present invention is described in more details below.Explanation is illustrating for one embodiment below, because
Even if this is statement that is clear, limiting, the interest field being defined by the claims also not is limited.Moreover, below to the present invention
When being illustrated, judging to obscure the gist of the invention with may not be necessary to relevant known technical ability or illustrating for composition
In the case where will description is omitted.
As depicted in figs. 1 and 2, the biogas solidification preprocess method of one embodiment of the invention is related to a kind of biogas pretreatment side
Method, remove moisture contained in the biogas generated by anaerobic digestion as organic waste, siloxanes, sulfide, vegetable oil with
And volatile organic compounds, and including using the compression step S3 compressed with the oilless (oil free) compressor 3 of water lubrication to biogas.
Water used in the present invention, can be tap water at normal temperature.
Compressor used in the present invention uses the compressor of oil lubrication different from usual, refers to the water lubrication compression of oil-free
Machine, the compressor are recorded in KR published patent the 10-2009-0080473rd.
In the past, the corrosion of air compressor is prevented using oil lubrication air compressor, but used as lubricant
Oil pollutes adsorbent in Biological Pretreatment facility and film surface, in order to prevent such problems, needs to increase filtering
And adsorbent.And exist because the vegetable oil in biogas causes what the operating load amount of subsequent foreign matter removal step reduced to ask
Topic.
In this regard, by the present invention in that with use water lubrication oilless (oil free) compressor 3, it is as described above to solve the problems, such as.
And in the case where being compressed using oil to biogas, the temperature in compressor 3 rises to 100~200 DEG C, and makes
In the case where with water, it is able to maintain that 20~60 DEG C of low temperature.Therefore, when being cooled down with 5~20 DEG C of temperature to biogas behind
Power consumption can be reduced, the condensed water of condensation moisture of saturation state close in biogas is generated in compression step S3, with the water used
Mixing, therefore 20~40% of the water by compression step S3 is substituted, so that effectively removing for contained humidity in biogas can be realized.
And then can be improved the efficiency of condensed water removal step S8, removal is to through excessive in the condensed water removal step S8
The condensed water that biogas from step S4 generates when being cooled down.
Moreover, oil is replaced with water, and since the temperature of water is low, siloxanes, sulfide contained in biogas and volatilization
The impurity such as property organic compound are easier to be dissolved in than in oily low temperature and the water of high pressure, therefore can effectively remove impurity.
In turn, it can be improved below using the efficiency of the foreign matter removal step S10 of absorption drier 12, be able to extend suction
The service life of attached formula drying machine 12.
Preferably, compressor 3 used in the compression step S1 can be screw compressor.
Compared with the reciprocating compressor for generating pulsation, screw is more suitable for and operational efficiency is more excellent.
Before the compression step S3, it may include: whipping step S1, it will thus provide biogas and water put into blender 1
It is stirred；And investment step S2, the biogas stirred and water are put into the compressor 3 by investment valve 2.
Blender 1 preferably makes the maximized blender of the contact area of water and biogas.By the whipping step S1, from
And the moisture of saturation state can more fully be mixed with water in biogas, can be generated for putting into the pressure of compressor 3
Power.Moreover, because the water lubrication of compressor 3, therefore also have the effect of the water needed for compressor 3 that puts into operation.
After the compression step S3, it may include: separating step S4, to the biogas and water being discharged from the compressor 3
It is separated；And drain step S5, pass through the 20%~40% of the total weight of the water after the discharge separation of drain valve 5.
Separating step S4 of the present invention is by discharge water storagetank 4, to purging quite a few moisture, siloxanes, vulcanization
The biogas and water of the impurity such as object, vegetable oil and volatile organic compounds carry out demisting.
The compressor 3 used in the present invention filled the water compresses biogas, therefore is compressed not with to air
Together, the impurity such as the moisture in biogas, siloxanes, sulfide, vegetable oil and volatile organic compounds are dissolved in condensed water, due to
Condensed water is mixed with the water being discharged from compressor 3, thus with need be discharged separate after water total weight 5%~10% sky
Gas is compared, and needs largely to be discharged the 20%~40% of the total weight of the water after separation.
As needed, it may also include and be discharged accordingly after the concentration for measuring impurities in water makes a return journey the step of concluding displacement
The step of water of amount (not shown).
Preferably, the pressure in the compression step S3 for compression can be 7~10barg.
If pressure is less than 7barg, biogas adverse current, which may occur, if pressure is greater than 10barg may give biogas
Pretreatment facility brings pressure.
It may also include and put into step S6 again, it is described to be put into step S6 again, it is remaining after being drained in the drain step
Water is cooled to 20~40 DEG C using the first cooler 7, is filtered and is put into again to pressure to particulate matters such as dust with filter 8
Normal-temperature water is used as cooling water by putting into valve 6 again by contracting machine 3, first cooler 7.
Since the temperature of the water by compression step S3 may rise to higher than 40 DEG C, needing will be by 1 row of heat exchanger
It is remaining after water to be water-cooled to 20~40 DEG C.In the case that water temperature is more than 40 DEG C, behind power consumption when biogas is cooled to 5~20 DEG C
It can increase, the generation of condensed water reduces when compressed biogas, therefore compared with the case where water temperature is lower than 40 DEG C, goes the effect of moisture removal
Rate may be lower.And it will be to remaining water after the cooling draining and the natural pond by being recycled for trapping after the filtering of filter 8
Gas is put into again into compressor 3 together, so as to reduce water consumption.
It may also include that cooling step S7, the biogas separated in the separating step 4 be cooled to 5 using the second cooler 9
~20 DEG C；Condensed water removes step S8, removes condensed water caused by biogas cooling in the cooling step S7；Moisture removal
Step S9, using moisture filter 11, the moisture filter 11 for remove removed in condensed water removal step S8 it is cold
Residual moisture in the biogas of condensate；And foreign matter removal step S10, using absorption drier 12, the absorption drier
12 for removing moisture, siloxanes, sulfide and the volatility of micro residue in the biogas by the moisture removal step S9
Organic compound.
As shown in figure 3, absorption drier 12 used in the foreign matter removal step S10 may include boulder bed 121,
125, active oxidation aluminium layer 122, molecular sieve layer 123 and active carbon layer 124.
The absorption drier 12 can be sequentially filled boulder bed 121, active oxidation aluminium layer 122, molecule from top by layer
Screen layers 123, active carbon layer 124, boulder bed 125.
Step S8 and foreign matter removal step S10 successively is removed by cooling step S7, condensed water, realizes and is suitble to absorption type dry
5~20 DEG C of biogas temperature of the operation of dry machine 12 is 90% or more of saturation moisture in removal biogas, and removes micro water
Divide, siloxanes, sulfide and volatile organic compounds provide effective condition.
Condensed water remove step S8 in, after the condensed water flowed down after cooling is stored in condensed water storagetank 10, send to
Waste water disposal facility removes condensed water.
Foreign matter removal step S10 using absorption drier 12 is the item in order to meet city gas quality check criteria
Part and increase, the city gas quality check criteria is sulfide 30mg/Nm3 (0 DEG C, 101.3kpa), -12 DEG C of water dew point with
Lower at7Mpa (- 60 DEG C of atmospheric pressure water dew point or less) and siloxanes 10mg/Nm3(0 DEG C, 101.3kpa) below.
Generally for the moisture being saturated in removal biogas, the foreign matter removal step carried out by absorption drier is carried out,
It is pressure-variable adsorption process (the PSA:Pressure swing for driving variable that the absorption drier, which is applicable in and divides into pressure,
It adsorption is) or with temperature temp.-changing adsorption process (the TSA:Temperature swing for driving variable
Adsorption gas separation).
Herein, being suitable for the invention absorption drier 12 is the absorption drier using pressure-variable adsorption process,
It is the drying device for being applicable in following gas separation: in the system being made of adsorbent and mixed gas, using because of system
The difference for the adsorption equilibrium quantity that interior pressures cycle generates, the characteristic ingredient being optionally sequestered in mixed gas.
In view of being suitable for the invention filler input in absorption drier 12 characteristically in addition to dividing water,
Carbon dioxide, sulfide, vegetable oil are also adsorbed, solidifies the composition substance for being applicable in following drying machine in preprocess method in biogas
It constitutes.
It is applicable in adsorbent and reproducible active carbon that emphasis removes moisture removal, by the filled layer in drying machine from upper successively structure
As boulder bed 121, active oxidation aluminium layer 122, molecular sieve layer 123, active carbon layer 124, boulder bed 125.
Biogas is first contacted with active oxidation aluminium layer 122, molecular sieve layer 123, active carbon layer 124, removes moisture removal, plant for the first time
Oil, siloxanes, remove sulphide removal finally by active carbon layer 124, so as to produce the gas for meeting city gas condition.
The present invention is characterized in that need to be applicable in use in view of the ratio of carbon dioxide in methane is 40% and enhance moisture
The molecular sieve layer 123 of the zeolite material of characterization of adsorption, in order to remove remaining sulfide, being applicable in can be from the regenerated work of high-temperature pressure-reduction
Property charcoal.
In particular, being filled with the good adsorbent activity oxidation of rate of water absorption in the absorption drier 12 that the present invention is applicable in
Aluminium (Activated Alumina), zeolite-series molecular sieve (Molecular Sieve, trade name) and active carbon.
At this time, it is preferable that the mixing ratio of adsorbent filler is molecule by quality ratio in the absorption drier 12
Sieve 60~70wt%, 10~20wt% of 20~30wt% of activated alumina and active carbon.
In addition, filler is made of layer in order not to make above-mentioned filler be mixed with each other.
Herein, the boulder bed 121,125 is filled in the upper and lower part of absorption drier 12 respectively, plays inhibition
Biased flow phenomenon in absorption drier 12 is prevented because of leakage phenomenon in the phenomenon that air-flow causes adsorbent to mix and pipeline
Effect.
In addition, the active oxidation aluminium layer 122 plays the role of executing residual moisture in removal biogas, the molecular sieve layer
123 play the role of producing the biogas with appropriate moisture content for being suitable for turning sludge into fuel by secondary moisture removal.
Herein, it before removing moisture removal with the molecular sieve layer 123 of the zeolite-series, is held with active oxidation aluminium layer 122
The reasons why row first moisture removal, is that the zeolite has the shortcomings that be influenced by moisture.And it is due to adsorbent again
Natural disposition is low, in order to which moisture is influenced reproducibility that is minimized and improving adsorbent in absorption drier 12.
At this point, the absorption drier 12 runs two, a column carry out moisture removal operation, and another column are by for transporting
Capable adsorbent reactivation process carries out operation preparation process.
In this way, the foreign matter removal step S10 carried out by absorption drier 12 is by removing water in methane by adsorbent
Divide to carry out.
The moisture removal solidifies the operation pressure of preprocess method to carry out, can make moisture removal according to control biogas
Efficiency is maximum.
In particular, according to the present invention, show as by dew point (Dew Point) in the biogas of the absorption drier 12-
80 DEG C or less (moisture content 0.6mg/m3, 0 DEG C of standard basis, under an atmospheric pressure).
In addition, passing through absorption drier 12 by the adsorbent reactivation process that 2 absorption driers 12 of operation carry out
The dew point that recovery section generates is -80 DEG C of biogas below, as the regeneration gas in absorption drier 12.
At this point, regeneration gas is heated to 120~200 DEG C before supplying to absorption drier 12, through heater, supply
To as the regeneration gas in absorption drier 12.
In addition, the regenerative process is configured to carry out under high-temperature pressure-reduction service condition, so as to smooth by depressurizing
Ground carries out the solution for being adsorbed to the moisture for the adsorbent surface filled in absorption drier 12, sulfide, siloxanes, vegetable oil
It inhales.
Certainly, the operation of absorption drier 12 and reproduction time are usually 18~24 hours, according to operator and now
Environment determines.
In this way, being put by the biogas that absorption drier 12 produces to next biogas for removing removing carbon dioxide and nitrogen etc.
In curing process.
Claims (9)
1. a kind of biogas solidifies preprocess method, remove contained in the biogas in organic waste by anaerobic digestion generation
Moisture, siloxanes, sulfide, vegetable oil and volatile organic compounds, and including using the oilless (oil free) compressor pair with water lubrication
The compression step that biogas is compressed.
2. biogas according to claim 1 solidifies preprocess method, which is characterized in that pressed used in the compression step
Contracting machine is screw compressor.
3. biogas according to claim 1 solidifies preprocess method, which is characterized in that before the compression step, also
Include:
The biogas of supply and water are put into and are stirred into blender by whipping step；And
Step is put into, the biogas of the stirring and water are put into the compressor.
4. biogas according to claim 1 solidifies preprocess method, which is characterized in that after the compression step, also
Include:
Separating step separates the biogas and water that are discharged from the compressor；And
Drain step is drained to 20%~40% of the water total weight after separation.
5. biogas according to claim 1 solidifies preprocess method, which is characterized in that compressed in the compression step
Pressure is 7~10barg.
6. biogas according to claim 4 solidifies preprocess method, which is characterized in that further include:
Step is put into again, it is remaining after being discharged in the drain step to be water-cooled to 20~40 DEG C, and after being filtered again
Investment is into compressor.
7. the biogas according to claim 4 or 6 solidifies preprocess method, which is characterized in that further include:
The biogas separated in the separating step is cooled to 5~20 DEG C by cooling step；
Condensed water removes step, removes the condensed water generated in cooling biogas in the cooling step；
Moisture removal step, using moisture filter, the moisture filter is for removing in condensed water removal step
Remaining moisture in biogas after removing condensed water；And
Foreign matter removal step, using absorption drier, the absorption drier is walked for removing by the moisture removal
The moisture of micro residue, siloxanes, sulfide, vegetable oil and volatile organic compounds in rapid biogas.
8. biogas according to claim 7 solidifies preprocess method, which is characterized in that make in the foreign matter removal step
Absorption drier includes boulder bed, active oxidation aluminium layer, molecular sieve layer and active carbon layer.
9. biogas according to claim 8 solidifies preprocess method, which is characterized in that the absorption drier is from top
Boulder bed, active oxidation aluminium layer, molecular sieve layer, active carbon layer, boulder bed are sequentially filled by layer.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2018-0036038 | 2018-03-28 | ||
| KR1020180036038A KR101900031B1 (en) | 2018-03-28 | 2018-03-28 | Pre-treament method for biogas purifying |
| PCT/KR2018/005920 WO2019189994A1 (en) | 2018-03-28 | 2018-05-24 | Biogas upgrading pretreatment method |
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| Publication Number | Publication Date |
|---|---|
| CN110446688A true CN110446688A (en) | 2019-11-12 |
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| CN201880000474.2A Pending CN110446688A (en) | 2018-03-28 | 2018-05-24 | Biogas solidifies preprocess method |
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| KR (1) | KR101900031B1 (en) |
| CN (1) | CN110446688A (en) |
| WO (1) | WO2019189994A1 (en) |
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| KR102196559B1 (en) * | 2019-07-04 | 2020-12-29 | (주)이앤켐솔루션 | Biogas impurity removal method and removal system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1680222A (en) * | 2005-02-03 | 2005-10-12 | 清华大学 | Production and apparatus for producing methane from refuse embedded gas |
| CN101493089A (en) * | 2008-01-21 | 2009-07-29 | 株式会社神户制钢所 | Water-lubricated compressor |
| CN101970080A (en) * | 2008-03-20 | 2011-02-09 | 弗洛技术控股有限公司 | Gas treatment apparatus-water flooded screw compressor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101261345B1 (en) * | 2011-03-21 | 2013-05-09 | (주) 지엔씨에너지 | Pre-treatment equipment for bio gas and method for removing water out of bio gas by using the same |
| KR101207532B1 (en) * | 2011-05-24 | 2012-12-03 | 주식회사 에코에너지홀딩스 | Apparatus for performing drying and removing impurities process of bio-methane at high purity bio-methane purification system |
| KR101455512B1 (en) * | 2013-02-19 | 2014-10-27 | 김왕환 | anti-freezingusing system for water-lubrication type air compressor |
| KR101765105B1 (en) * | 2014-09-29 | 2017-08-04 | 이영상 | Biogas compression system using the water piston device |
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2018
- 2018-03-28 KR KR1020180036038A patent/KR101900031B1/en active IP Right Grant
- 2018-05-24 WO PCT/KR2018/005920 patent/WO2019189994A1/en active Application Filing
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1680222A (en) * | 2005-02-03 | 2005-10-12 | 清华大学 | Production and apparatus for producing methane from refuse embedded gas |
| CN101493089A (en) * | 2008-01-21 | 2009-07-29 | 株式会社神户制钢所 | Water-lubricated compressor |
| CN101970080A (en) * | 2008-03-20 | 2011-02-09 | 弗洛技术控股有限公司 | Gas treatment apparatus-water flooded screw compressor |
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| Publication number | Publication date |
|---|---|
| KR101900031B1 (en) | 2018-09-18 |
| WO2019189994A1 (en) | 2019-10-03 |
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