CN108929735A - It is a kind of using pressurization filter membrane come the purifying technique of purifying biogas - Google Patents
It is a kind of using pressurization filter membrane come the purifying technique of purifying biogas Download PDFInfo
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- CN108929735A CN108929735A CN201810594270.8A CN201810594270A CN108929735A CN 108929735 A CN108929735 A CN 108929735A CN 201810594270 A CN201810594270 A CN 201810594270A CN 108929735 A CN108929735 A CN 108929735A
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- biogas
- filter membrane
- gas
- purifying
- pressurization
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- 239000012528 membrane Substances 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 42
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 54
- 238000001914 filtration Methods 0.000 claims abstract description 25
- 239000012535 impurity Substances 0.000 claims abstract description 16
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 15
- 230000023556 desulfurization Effects 0.000 claims abstract description 15
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 14
- 239000005864 Sulphur Substances 0.000 claims abstract description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000007787 solid Substances 0.000 claims abstract description 4
- 238000011017 operating method Methods 0.000 claims abstract description 3
- 239000007789 gas Substances 0.000 claims description 48
- 239000004642 Polyimide Substances 0.000 claims description 23
- 229920001721 polyimide Polymers 0.000 claims description 23
- 239000012510 hollow fiber Substances 0.000 claims description 17
- 239000007788 liquid Substances 0.000 claims description 13
- 239000003345 natural gas Substances 0.000 claims description 13
- 239000000654 additive Substances 0.000 claims description 10
- 230000000996 additive effect Effects 0.000 claims description 10
- 230000006835 compression Effects 0.000 claims description 10
- 238000007906 compression Methods 0.000 claims description 10
- 238000009987 spinning Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000011049 filling Methods 0.000 claims description 7
- 239000002904 solvent Substances 0.000 claims description 7
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- -1 4-butyl Chemical group 0.000 claims description 5
- 125000003158 alcohol group Chemical group 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 5
- PSZYNBSKGUBXEH-UHFFFAOYSA-M naphthalene-1-sulfonate Chemical compound C1=CC=C2C(S(=O)(=O)[O-])=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-M 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 5
- 238000009736 wetting Methods 0.000 claims description 5
- 239000003610 charcoal Substances 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 239000000395 magnesium oxide Substances 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 238000001179 sorption measurement Methods 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 239000011787 zinc oxide Substances 0.000 claims description 3
- 238000005374 membrane filtration Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 3
- 238000000746 purification Methods 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 5
- 238000005261 decarburization Methods 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 238000005262 decarbonization Methods 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 235000012489 doughnuts Nutrition 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
- C10L3/106—Removal of contaminants of water
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
- C10L3/102—Removal of contaminants of acid contaminants
- C10L3/103—Sulfur containing contaminants
Landscapes
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a kind of using pressurization filter membrane come the purifying technique of purifying biogas, and concrete technology method operating procedure is as follows：S1:Biogas is pressurizeed by booster fan and is discharged into dehydrating tower, dehydrating tower is first carried out dehydrating biogas, to promote the aridity of biogas；S2:Dewatered biogas is discharged into desulfurizing tower again, and desulfurizing tower can remove the gaseous impurity that element sulphur is had in biogas, to reduce the pollution of environment；S3:Biogas after desulfurization, which enters, carries out coarse filtration in coarse filter, removes the solid insoluble impurity in biogas, stores using biogas compressor compressed biogas, and by compressed biogas to storing in air accumulator.The present invention is pressurized filter membrane, two-stage supercharging filter membrane by level-one, and the methane content after being pressurized filter membrane in gas is greater than and reaches 97-99%, significantly improves the purity of methane, and filter effect is good, reduces the probability that soluble impurity enters automobile engine.
Description
Technical field
The present invention relates to methane purification technical field more particularly to it is a kind of using pressurization filter membrane come the purification work of purifying biogas
Skill.
Background technique
Biogas is a kind of mixed gas, removes main component methane（CH4）Outside, there are also carbon dioxide（CO2）, hydrogen sulfide
（H2S）, carbon monoxide（CO）Equal gases；Its ingredient is different with the raw material of fermentation, condition and the difference of process flow, usual
In the case of, methane content is 55 ~ 70%, and carbon dioxide content is 25 ~ 40%, other gas contents are lower, and every cubic metre of natural pond
The calorific value of gas is about 20800 ~ 23600 kilojoules, so few heat be used as automobile energy be it is much insufficient, so necessary
The purification that pass through biogas, improves its purity, increases the release of its energy, and the aerating that could be used for automobile uses.
Through retrieving, Chinese patent application publication No. CN103666613A discloses a kind of purification of Methane decarbonization and prepares automobile-used day
The method of right gas, includes the following steps：(1) biogas is subjected to compression boosting, is sent into surge tank and is buffered；(2) pass through three-level
Filter is filtered biogas；(3) biogas of clean dried after filtering is heated to 50 DEG C, is sent into membrane module and carries out decarburization
Separation, the foreign gas isolated give off the system, and the natural gas isolated is transported to CNG compressor；(4) CNG is used
Compressor pressurizes to natural gas, is conveyed to aerating column or dispenser, and supply natural gas vehicle uses.
The shortcoming of existing methane purification technology：Simply by compressor, gas-liquid separator, desulphurization system, decarburization
System carries out desulfurization and decarburization processing, and the methane content after the completion of purifying not is very high, and does not carry out pressurizing filter to biogas,
Its solubility enters the carbon distribution for being easy to make inside automobile engine inside car engine, to affect the use longevity of engine
Life.
Summary of the invention
The purpose of the present invention is to provide a kind of using pressurization filter membrane come the purifying technique of purifying biogas, is pressurized by level-one
Filter membrane, two-stage supercharging filter membrane, the methane content after being pressurized filter membrane in gas, which is greater than, reaches 97-99%, significantly improves first
The purity of alkane, and the advantage that filter effect is good solve methane purification technology simply by compressor, gas-liquid separator, de-
Sulphur system, decarbonization system carry out desulfurization and decarburization processing, and the methane content after the completion of purifying not is very high problem.
According to an embodiment of the present invention a kind of using filter membrane is pressurized come the purifying technique of purifying biogas, concrete technology method is grasped
Steps are as follows for work：
S1:Biogas is pressurizeed by booster fan and is discharged into dehydrating tower, dehydrating tower is first carried out dehydrating biogas,
To promote the aridity of biogas；
S2:Dewatered biogas is discharged into desulfurizing tower again, and desulfurizing tower can remove the gaseous impurity that element sulphur is had in biogas, from
And reduce the pollution of environment；
S3:Biogas after desulfurization, which enters, carries out coarse filtration in coarse filter, remove the solid insoluble impurity in biogas, using
Biogas compressor compressed biogas, and compressed biogas is stored to storing in air accumulator；
S4:Storage enters to the gas in air accumulator carries out gas-liquid separation in gas-liquid separator, liquid discharge, gas passes through cold again
Dry machine is dried, and the gas after drying process, which enters in accurate filter, carries out essence removal of impurities processing；
S5:Gas after essence removal of impurities processing enters charcoal canister and carries out adsorption treatment, the peculiar smell in gas is removed, after the completion of absorption
It is discharged into heater and carries out heating heat treatment, increase the volume of gas to pressurize；
S6:Gas after the completion of heating is pressurized filter membrane by level-one first and is filtered processing, then pass through two-stage supercharging filter membrane into
Row filtration treatment, the gas after the completion of filtering are compressed by natural gas compressor, are fully enclosed in bottle group after compression；
S7:Gas in bottle group is connected by transport to gas station with air filling gun, and air filling gun is then used for refueling
Processing.
Further, generated unqualified gas is all delivered to biogas pressure again after the level-one pressurization membrane filtration
Compression filtration treatment is carried out in contracting machine again, the pressure at expulsion of the biogas compressor is 0.5-0.7MPa.
Further, the desulfurization method of the desulfurizing tower be conventional wet lay, it is dry method, any one in biological desulfurization process
Kind.
Further, it is 1.0-1.5MPa that the booster fan, which increases the pressure value of biogas,.
Further, the filtering accuracy of the level-one pressurization filter membrane is 1-3 μm, the filtering accuracy of two-stage supercharging filter membrane is
0.5-1μm。
Further, level-one pressurization filter membrane, inside two-stage supercharging filter membrane be 10-12MPa to gas pressurized value.
Further, the pressure at expulsion of the natural gas compressor is 1.0-1.5MPa.
Further, level-one pressurization filter membrane, be provided with modified polyimide doughnut in two-stage supercharging filter membrane
Film wire.
Further, the preparation method of the modified polyimide hollow fiber film thread includes the following steps：
S1：By polyimides with and 4-butyl amine naphthalene sulfonate be mixed in a certain ratio, sequentially add solvent, additive exists
48h is dissolved at 45-50 DEG C；
S2：It filtered, deaerated using the spinning on self-control spinning machine of dry/wetting phase conversion method, so that modified polyimide be made
Hollow fiber film thread.
Further, the solvent is alcohol, and the additive is silica, magnesia, any one in zinc oxide
Kind.
Compared with the prior art, the invention has the beneficial effects that：Thick biogas enters Marsh gas compression through dehydration desulfurization filtering
Machine pressurization, then through gas-liquid separation, cooling driers, filter, active carbon, heater, filter membrane is pressurized by level-one, two-stage supercharging is filtered
Film, the methane content after being pressurized filter membrane in gas, which is greater than, reaches 97-99%, natural gas compressor, bottle group is entered back into, through adding
Automobile is added in air gun（CNG）, the purity of methane is significantly improved, and filter effect is good, reduces soluble impurity entrance
The probability of automobile engine extends the service life of automobile engine.
Detailed description of the invention
Attached drawing is used to provide further understanding of the present invention, and constitutes part of specification, with reality of the invention
It applies example to be used to explain the present invention together, not be construed as limiting the invention.In the accompanying drawings：
Fig. 1 is a kind of process step figure of purifying technique using pressurization filter membrane come purifying biogas proposed by the present invention.
In figure：1- booster fan, 2- dehydrating tower, 3- desulfurizing tower, 4- coarse filter, 5- biogas compressor, 6- air accumulator, 7-
Gas-liquid separator, 8- cooling driers, 9- accurate filter, 10- charcoal canister, 11- heater, 12- level-one are pressurized filter membrane, 13- bis-
Grade pressurization filter membrane, 14- air accumulator, 15- natural gas compressor, 16- bottles of groups, 17- air filling gun, 18- refueling.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment 1
Referring to Fig.1, a kind of using filter membrane is pressurized come the purifying technique of purifying biogas, concrete technology method operating procedure is as follows：
S1:Biogas is pressurizeed by booster fan 1 and is discharged into dehydrating tower 2, dehydrating tower 2 first carries out at dehydration biogas
Reason, to promote the aridity of biogas；
S2:Dewatered biogas is discharged into again in desulfurizing tower 3, and desulfurizing tower 3 can remove the gaseous impurity that element sulphur is had in biogas,
To reduce the pollution of environment；
S3:Biogas after desulfurization, which enters, carries out coarse filtration in coarse filter 4, remove the solid insoluble impurity in biogas, then pass through
It crosses 5 compressed biogas of biogas compressor, and compressed biogas is stored to storing in air accumulator 6；
S4:Storage enters to the gas in air accumulator 6 carries out gas-liquid separation in gas-liquid separator 7, liquid discharge, gas passes through again
Cooling driers 8 are dried, and the gas after drying process, which enters in accurate filter 9, carries out essence removal of impurities processing；
S5:Gas after essence removal of impurities processing enters charcoal canister 10 and carries out adsorption treatment, removes the peculiar smell in gas, and absorption is completed
After be discharged into heater 11 and carry out heating heat treatment, increase the volume of gas to pressurize；
S6:Gas after the completion of heating is pressurized filter membrane 12 by level-one first and is filtered processing, then passes through two-stage supercharging filter membrane
13 are filtered processing, and the gas after the completion of filtering is compressed by natural gas compressor 15, are fully enclosed in bottle group 16 after compression；
S7:Gas in bottle group 16 is connected by transport to gas station with air filling gun 17, and air filling gun is then used for automobile
Aerating 18 is handled.
Generated unqualified gas is all delivered in biogas compressor 5 again again after level-one pressurization filter membrane 12 filters
Compression filtration treatment is carried out, the pressure at expulsion of biogas compressor 5 is 0.5MPa.
The desulfurization method of desulfurizing tower 3 is conventional wet lay.
The pressure value that booster fan 1 increases biogas is 1.0MPa.
The filtering accuracy of level-one pressurization filter membrane 12 is 1 μm, the filtering accuracy of two-stage supercharging filter membrane 13 is 0.5 μm.
It is 10MPa to gas pressurized value inside level-one pressurization filter membrane 12, two-stage supercharging filter membrane 13.
The pressure at expulsion of natural gas compressor 15 is 1.0MPa.
It is provided with modified polyimide hollow fiber film thread in level-one pressurization filter membrane 12, two-stage supercharging filter membrane 13, it is modified
Polyimide Hollow Fiber silk can increase the compression strength of level-one pressurization filter membrane, two-stage supercharging filter membrane, increase making for filter membrane
Use duration.
The preparation method of modified polyimide hollow fiber film thread includes the following steps：
S1：By polyimides with and 4-butyl amine naphthalene sulfonate be mixed in a certain ratio, mixed proportion 1:1, it sequentially adds molten
Agent, additive dissolve 48h at 45 DEG C；
S1：It filtered, deaerated using the spinning on self-control spinning machine of dry/wetting phase conversion method, so that modified polyimide be made
Hollow fiber film thread.
Solvent is alcohol, and additive is silica.
Embodiment 2
Purifying technique step is same as Example 1；
Generated unqualified gas is all delivered in biogas compressor 5 again after level-one pressurization filter membrane 12 filters carries out again
Filtration treatment is compressed, the pressure at expulsion of biogas compressor 5 is 0.6MPa.
The desulfurization method of desulfurizing tower 3 is dry desulfurization.
The pressure value that booster fan 1 increases biogas is 1.3MPa.
The filtering accuracy of level-one pressurization filter membrane 12 is 2 μm, the filtering accuracy of two-stage supercharging filter membrane 13 is 0.8 μm.
It is 11MPa to gas pressurized value inside level-one pressurization filter membrane 12, two-stage supercharging filter membrane 13.
The pressure at expulsion of natural gas compressor 15 is 1.3MPa.
It is provided with modified polyimide hollow fiber film thread in level-one pressurization filter membrane 12, two-stage supercharging filter membrane 13, it is modified
Polyimide Hollow Fiber silk can increase the compression strength of level-one pressurization filter membrane, two-stage supercharging filter membrane, increase making for filter membrane
Use duration.
The preparation method of modified polyimide hollow fiber film thread includes the following steps：
S1：By polyimides with and 4-butyl amine naphthalene sulfonate be mixed in a certain ratio, mixed proportion 2:1, it sequentially adds molten
Agent, additive dissolve 48h at 46 DEG C；
S1：It filtered, deaerated using the spinning on self-control spinning machine of dry/wetting phase conversion method, so that modified polyimide be made
Hollow fiber film thread.
Solvent is alcohol, and additive is magnesia.
Embodiment 3
Purifying technique step is same as Example 1；
Generated unqualified gas is all delivered in biogas compressor 5 again after level-one pressurization filter membrane 12 filters carries out again
Filtration treatment is compressed, the pressure at expulsion of biogas compressor 5 is 0.7MPa.
The desulfurization method of desulfurizing tower 3 is biological desulphurization.
The pressure value that booster fan 1 increases biogas is 1.5MPa.
The filtering accuracy of level-one pressurization filter membrane 12 is 3 μm, the filtering accuracy of two-stage supercharging filter membrane 13 is 1 μm.
It is 12MPa to gas pressurized value inside level-one pressurization filter membrane 12, two-stage supercharging filter membrane 13.
The pressure at expulsion of natural gas compressor 15 is 1.0-1.5MPa.
It is provided with modified polyimide hollow fiber film thread in level-one pressurization filter membrane 12, two-stage supercharging filter membrane 13, it is modified
Polyimide Hollow Fiber silk can increase the compression strength of level-one pressurization filter membrane, two-stage supercharging filter membrane, increase making for filter membrane
Use duration.
The preparation method of modified polyimide hollow fiber film thread includes the following steps：
S1：By polyimides with and 4-butyl amine naphthalene sulfonate be mixed in a certain ratio, mixed proportion 1:2, it sequentially adds molten
Agent, additive dissolve 48h at 50 DEG C；
S1：It filtered, deaerated using the spinning on self-control spinning machine of dry/wetting phase conversion method, so that modified polyimide be made
Hollow fiber film thread.
Solvent is alcohol, and additive is zinc oxide.
Place is not described in detail by the present invention, is the well-known technique of those skilled in the art.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (10)
1. it is a kind of using pressurization filter membrane come the purifying technique of purifying biogas, which is characterized in that concrete technology method operating procedure is such as
Under：
S1:Biogas is pressurizeed by booster fan and is discharged into dehydrating tower, dehydrating tower is first carried out dehydrating biogas,
To promote the aridity of biogas；
S2:Dewatered biogas is discharged into desulfurizing tower again, and desulfurizing tower can remove the gaseous impurity that element sulphur is had in biogas, from
And reduce the pollution of environment；
S3:Biogas after desulfurization, which enters, carries out coarse filtration in coarse filter, remove the solid insoluble impurity in biogas, using
Biogas compressor compressed biogas, and compressed biogas is stored to storing in air accumulator；
S4:Storage enters to the gas in air accumulator carries out gas-liquid separation in gas-liquid separator, liquid discharge, gas passes through cold again
Dry machine is dried, and the gas after drying process, which enters in accurate filter, carries out essence removal of impurities processing；
S5:Gas after essence removal of impurities processing enters charcoal canister and carries out adsorption treatment, the peculiar smell in gas is removed, after the completion of absorption
It is discharged into heater and carries out heating heat treatment, increase the volume of gas to pressurize；
S6:Gas after the completion of heating is pressurized filter membrane by level-one first and is filtered processing, then pass through two-stage supercharging filter membrane into
Row filtration treatment, the gas after the completion of filtering are compressed by natural gas compressor, are fully enclosed in bottle group after compression；
S7:Gas in bottle group is connected by transport to gas station with air filling gun, and air filling gun is then used for refueling
Processing.
2. it is according to claim 1 it is a kind of using pressurization filter membrane come the purifying technique of purifying biogas, it is characterised in that：It is described
After level-one pressurization membrane filtration generated unqualified gas be all delivered in biogas compressor again carry out again it is compressed
Filter processing, the pressure at expulsion of the biogas compressor are 0.5-0.7MPa.
3. it is according to claim 1 it is a kind of using pressurization filter membrane come the purifying technique of purifying biogas, it is characterised in that：It is described
The desulfurization method of desulfurizing tower is conventional wet lay, dry method, any one in biological desulfurization process.
4. it is according to claim 1 it is a kind of using pressurization filter membrane come the purifying technique of purifying biogas, it is characterised in that：It is described
The pressure value that booster fan increases biogas is 1.0-1.5MPa.
5. it is according to claim 1 it is a kind of using pressurization filter membrane come the purifying technique of purifying biogas, it is characterised in that：It is described
The filtering accuracy of level-one pressurization filter membrane is 1-3 μm, the filtering accuracy of two-stage supercharging filter membrane is 0.5-1 μm.
6. it is according to claim 5 it is a kind of using pressurization filter membrane come the purifying technique of purifying biogas, it is characterised in that：It is described
It is 10-12MPa to gas pressurized value inside level-one pressurization filter membrane, two-stage supercharging filter membrane.
7. it is according to claim 1 it is a kind of using pressurization filter membrane come the purifying technique of purifying biogas, it is characterised in that：It is described
The pressure at expulsion of natural gas compressor is 1.0-1.5MPa.
8. it is according to claim 6 it is a kind of using pressurization filter membrane come the purifying technique of purifying biogas, it is characterised in that：It is described
Modified polyimide hollow fiber film thread is provided in level-one pressurization filter membrane, two-stage supercharging filter membrane.
9. it is according to claim 8 it is a kind of using pressurization filter membrane come the purifying technique of purifying biogas, which is characterized in that it is described
The preparation method of modified polyimide hollow fiber film thread includes the following steps：
S1：By polyimides with and 4-butyl amine naphthalene sulfonate be mixed in a certain ratio, sequentially add solvent, additive exists
48h is dissolved at 45-50 DEG C；
S2：It filtered, deaerated using the spinning on self-control spinning machine of dry/wetting phase conversion method, so that modified polyimide be made
Hollow fiber film thread.
10. it is according to claim 9 it is a kind of using pressurization filter membrane come the purifying technique of purifying biogas, it is characterised in that：Institute
Stating solvent is alcohol, and the additive is silica, magnesia, any one in zinc oxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810594270.8A CN108929735A (en) | 2018-06-11 | 2018-06-11 | It is a kind of using pressurization filter membrane come the purifying technique of purifying biogas |
Applications Claiming Priority (1)
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