CN109666522A - A kind of bio-natural gas efficient purifying system and purification method - Google Patents
A kind of bio-natural gas efficient purifying system and purification method Download PDFInfo
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- CN109666522A CN109666522A CN201910165226.XA CN201910165226A CN109666522A CN 109666522 A CN109666522 A CN 109666522A CN 201910165226 A CN201910165226 A CN 201910165226A CN 109666522 A CN109666522 A CN 109666522A
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- 239000003345 natural gas Substances 0.000 title claims abstract description 81
- 238000000746 purification Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000007789 gas Substances 0.000 claims abstract description 124
- 238000006703 hydration reaction Methods 0.000 claims abstract description 63
- 230000036571 hydration Effects 0.000 claims abstract description 52
- 238000004140 cleaning Methods 0.000 claims abstract description 38
- 238000005201 scrubbing Methods 0.000 claims abstract description 36
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 23
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 10
- 238000004064 recycling Methods 0.000 claims abstract description 10
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 9
- 229910000037 hydrogen sulfide Inorganic materials 0.000 claims abstract description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 7
- 239000001301 oxygen Substances 0.000 claims abstract description 7
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 7
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 36
- 239000007788 liquid Substances 0.000 claims description 16
- 238000005406 washing Methods 0.000 claims description 13
- 239000012535 impurity Substances 0.000 claims description 8
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 229910002090 carbon oxide Inorganic materials 0.000 claims description 3
- 239000004615 ingredient Substances 0.000 claims description 3
- -1 carbon dioxide hydrate Carbon oxide Chemical compound 0.000 claims description 2
- 241000790917 Dioxys <bee> Species 0.000 claims 1
- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 abstract description 13
- 238000000926 separation method Methods 0.000 abstract description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000004781 supercooling Methods 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 35
- VTVVPPOHYJJIJR-UHFFFAOYSA-N carbon dioxide;hydrate Chemical compound O.O=C=O VTVVPPOHYJJIJR-UHFFFAOYSA-N 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 238000007701 flash-distillation Methods 0.000 description 3
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical group NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- HXKKHQJGJAFBHI-UHFFFAOYSA-N 1-aminopropan-2-ol Chemical compound CC(O)CN HXKKHQJGJAFBHI-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000005713 exacerbation Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000000887 hydrating effect Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 229940102253 isopropanolamine Drugs 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- C10L3/102—Removal of contaminants of acid contaminants
- C10L3/104—Carbon dioxide
-
- 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
Abstract
The invention discloses a kind of bio-natural gas efficient purifying system and purification methods, including gas source, scrubbing tower, compressor, deoxidation denitrification column, flash tank, gas booster I, hydration reactor I, gas booster II, stripper, hydration reactor II, condenser, caisson, cleaning solution recycling can；Compared with prior art, after the washed tower processing of bio-natural gas of the present invention, enter deoxidation denitrification column after compressor compresses again to be handled, the separation and removing of foreign gas such as hydrogen sulfide, nitrogen and oxygen etc. is realized, to further improve the purification efficiency of bio-natural gas.Meanwhile temperature condition needed for gas hydrate reaction process is realized by constant temperature air bath, further controls the temperature condition and its degree of supercooling of hydration reaction process.Certain density gas hydrate accelerant is added in hydration reactor, realizes that carbon dioxide gas gas hydrate quickly generates, and then improve the purification efficiency of bio-natural gas.
Description
Technical field
The present invention relates to bio-natural gas technical field of energy utilization more particularly to a kind of bio-natural gas high-efficient purification systems
System and purification method.
Background technique
With the exacerbation of consumption and the environmental pollution of fossil energy, energy is substituted by the biomass of representative of bio-natural gas
Source has become the important channel for solving energy and environmental problem.Bio-natural gas is also referred to as biological flue gas, refers to and converts from biomass
And the combustion gas come, mainly by methane (50%~80%), carbon dioxide (20%~40%), nitrogen (0%~5%), hydrogen sulfide
The gas compositions such as (0.1%~3%), hydrogen (< 1%), oxygen (< 0.4%).Bio-natural gas as a kind of renewable energy,
It can will be built directly as the alternative fuel of petrochemical industry natural gas, extensive development for low-carbon economy, energy security and new rural village
If making bigger contribution.Therefore, it is extremely urgent that new and effective bio-natural gas purification and purification technique are developed.
Currently, separating-purifying obtains the method that high-purity methane gas generallys use substep purification from bio-natural gas.It removes
The common method of carbon dioxide in bio-natural gas mainly has pressure swing adsorption method, absorption process, membrane separation process and low temperature processing
Deng.The method for removing hydrogen sulfide in bio-natural gas mainly has dry desulfurization, wet desulphurization and biological desulphurization etc..However, traditional
Bio-natural gas purification and separation method there are complex process, cost of investment is high, energy consumption is high, separating effect is undesirable, is not easy to
The problems such as industrial-scale production.
In recent years, Chinese patent CN103113945 and CN103113946 discloses a kind of methane purifying system and natural pond respectively
Gas purifying method, this two patents pass through high pressure deoxidation denitrogenation and high pressure deoxidation removal of impurities respectively and amine liquid washs the side combined
Formula, to improve the methane content in biogas.Chinese patent CN104073311 discloses a kind of methane purification purification system,
Realize the separation of foreign gas, using foreign gas different solubility in water to achieve the purpose that methane purification.In addition,
Chinese patent CN105950240 discloses a kind of methane purifying system and its purification method, passes through moisture trap and desulfurizing tower
The purifying of biogas is realized in processing.However, purification separation difficulty is larger due to bio-natural gas complicated composition, seriously affect
The efficiency of combustion of bio-natural gas, limits the purposes of bio-natural gas.
How to realize that the high-efficient purification of bio-natural gas has become technical problem urgently to be resolved.The purification of gas hydrate method
Bio-natural gas is the generation based on gas hydrate, and foreign gas (gases such as CO2, H2S) is allowed to generate gas under certain condition
Gas hydrate, the method for obtaining high-purity methane.In bio-natural gas purification journey, the hydrating agents of decomposition still can be recycled
It utilizes, realizes the high efficiency, low cost purification and purification of bio-natural gas.
Summary of the invention
The object of the invention is that provide to solve the above-mentioned problems a kind of bio-natural gas efficient purifying system and
Purification method.
The present invention through the following technical solutions to achieve the above objectives:
A kind of bio-natural gas efficient purifying system of the present invention, including gas source, scrubbing tower, compressor, deoxidation denitrification column, flash distillation
Tank, gas booster I, hydration reactor I, gas booster II, stripper, hydration reactor II, condenser, caisson,
Cleaning solution recycling can；Scrubbing tower is connected to gas source；Scrubbing tower is connected to by compressor with deoxidation denitrification column, and deoxidation denitrification column goes out
Gas is by entering hydration reactor I through valve after gas booster I pressurization；The exit gas of hydration reactor I is through gas
Enter hydration reactor II through valve after booster II secondary booster；Gas passes through valve after hydration reactor II is handled again
Door enters caisson；Cleaning solution circulation and stress device includes flash tank, stripper, and flash tank is connected by valve and scrubbing tower
Logical, the outlet vapor of stripper enters cleaning solution recycling can after condenser condenses.
Preferably, the bio-natural gas pressure that the gas booster I is provided is 1.5 ~ 2.4MPa；The gas increases
The bio-natural gas pressure that depressor II is provided is 2.0 ~ 2.8MPa.
A kind of bio-natural gas efficient purifying system of the present invention and purification method, comprising the following steps:
(1) bio-natural gas enters scrubbing tower by gas source, removes hydrogen sulfide and partial CO 2 in bio-natural gas
Gas；Exit gas in scrubbing tower passes through compressor compresses, obtains compression biological natural gas, enters back into deoxidation denitrification column
In, for removing nitrogen and a small amount of oxygen in bio-natural gas；
(2) deoxidation denitrification column is connected to by gas booster I and valve with hydration reactor I, the exit gas of deoxidation denitrification column
By gas booster I, enter hydration reactor I by valve after pressurization, generates carbon dioxide hydrate and remove part two
Carbon oxide gas；
(3) exit gas of hydration reactor I enters hydration reactor II by valve after pressurization and carries out through gas booster II
It handles again, carbon dioxide hydrate is generated by hydration reaction and removes the carbon dioxide gas in bio-natural gas；Biology
Natural gas enters in caisson through valve, and the high-efficient purification of bio-natural gas is realized by multistep treatment；
(4) cleaning solution that foreign gas is absorbed in scrubbing tower enters flash tank by valve, absorbs impurity gas for removing
Partial impurities gas in the cleaning solution of body, the rich solution being purified；Flash tank is connected to stripper, and cleaning solution is again introduced into vapour
Stripper condenses by condenser for removing the foreign gas in cleaning solution, obtains washing recovered liquid, while can will wash back
Receipts liquid is delivered to scrubbing tower and is recycled；
(5) by step (1), (2), (3), (4), make bio-natural gas by scrubbing tower, compressor, deoxidation denitrification column, flash distillation
The processing of the links such as tank, gas booster I, hydration reactor I, gas booster II, hydration reactor II realizes that biology is natural
The high-efficient purification of gas；
(6) cleaning solution of foreign gas is absorbed by flash tank, stripper, condenser etc., is obtained washing recovered liquid, is realized
Cleaning solution recycles, and further improves the economy of bio-natural gas purification system；
(7) according to the ingredient of bio-natural gas, multistep treatment through the above steps realizes the high-efficient purification of bio-natural gas,
And then obtain high-purity methane.
The beneficial effects of the present invention are:
The present invention is a kind of bio-natural gas efficient purifying system and purification method, compared with prior art, present invention biology day
The right washed tower of gas handles and then enters deoxidation denitrification column after compressor compresses and handled, and realizes foreign gas such as
The separation and removing of hydrogen sulfide, nitrogen and oxygen etc., to further improve the purification efficiency of bio-natural gas.It is biological natural
Gas handles using the double purification of hydration reactor II after hydration reactor I purified treatment, realizes carbon dioxide gas
Efficiently separate and remove, greatly improve the purification efficiency of bio-natural gas.Meanwhile gas is provided in pipe-line system
Booster realizes that gas hydrate quickly generates for providing the pressure condition needed for gas hydrate generates.Scrubbing tower passes through
Valve is connected to flash tank, and the cleaning solution for absorbing foreign gas enters flash tank, and removing absorbs the cleaning solution of foreign gas
In partial impurities gas.Meanwhile flash tank is connected to stripper, and after the rich solution that flash distillation obtains enters stripper, removing
Foreign gas in cleaning solution obtains washing recovered liquid, further washing recovered liquid can be delivered to scrubbing tower.Its hydration reaction
Device is made of stainless steel and has form, and form is made of high pressure resistant glass.Meanwhile temperature needed for gas hydrate reaction process
Condition is realized by constant temperature air bath, further controls the temperature condition and its degree of supercooling of hydration reaction process.It is anti-in hydration
It answers and adds certain density gas hydrate accelerant in device, realize that carbon dioxide gas gas hydrate quickly generates, and then improve
The purification efficiency of bio-natural gas.
Detailed description of the invention
Fig. 1 is biological High-efficiency Gas purification system structural schematic diagram.
In figure: 1, gas source；2, scrubbing tower；3, compressor；4, valve；5, deoxidation denitrification column；6, flash tank；7, gas boosting
Device I；8, valve；9, hydration reactor I；10, gas booster II；11, valve；12, stripper；13, hydration reactor II；
14, condenser；15, valve；16, caisson；17, cleaning solution recycling can.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings:
A kind of bio-natural gas efficient purifying system of the invention as shown in Figure 1:, including gas source 1, scrubbing tower 2, compressor 3, deoxidation
Denitrification column 5, flash tank 6, gas booster I7, hydration reactor I9, gas booster II10, stripper 12, hydration reactor
II13, condenser 14, caisson 16, cleaning solution recycling can 17；Scrubbing tower 2 is connected to gas source 1；Scrubbing tower 2 passes through compressor 3
It is connected to deoxidation denitrification column 5, the exit gas of deoxidation denitrification column 5, which enters after being pressurized by gas booster I through valve 8, to be hydrated instead
Answer device I9；The exit gas of hydration reactor I9 enters hydration reactor through valve 11 after gas booster II10 secondary booster
II13；Gas enters caisson 16 after hydration reactor II13 is handled again, through valve 15；Cleaning solution circulation and stress dress
It sets including flash tank 6, stripper 12, flash tank 6 is connected to by valve 4 with scrubbing tower 2, and the outlet vapor of stripper 12 is through condensing
Device 14 enters cleaning solution recycling can 17 after condensing.
Preferably, the bio-natural gas pressure that the gas booster I7 is provided is 1.5 ~ 2.4MPa；The gas
The bio-natural gas pressure that booster II10 is provided is 2.0 ~ 2.8MPa.
The purification device is hydration reaction device and washing absorption device；The cleaning solution circulation and stress device packet
Flash tank and stripper are included, obtains recovered liquid for removing the foreign gas adsorbed in the cleaning solution of foreign gas.
Deoxidation denitrification column 5 is connected to compressor 3, for removing the oxygen or nitrogen that contain in bio-natural gas；Described
Compressor 3 is connected to scrubbing tower, forms compression biological natural gas for improving gas pressure.
Hydration reaction device removes the foreign gas carbon dioxide in bio-natural gas for generating gas hydrate；
The hydration reaction device includes hydration reactor I9 and hydration reactor II13；The gas booster I7 and gas increase
Depressor II10, for pressure needed for providing hydration reaction, by valve 8 and valve 11 respectively with hydration reactor I9 and hydration
Reactor II13 connection.
The washing absorption device is scrubbing tower 2, for removing hydrogen sulfide gas and part two in bio-natural gas
Carbon oxide gas；Cleaning solution selected by the washing absorption device is ethanolamine solutions, ethylene glycol by solution or isopropanol
Amine aqueous solution.
The cleaning solution circulation and stress device is realized by flash tank 6 and stripper 12；The flash tank 6 is for taking off
Except the partial impurities gas in the cleaning solution for absorbing foreign gas, the rich solution being purified；The stripper 12 is for taking off
Except the foreign gas in cleaning solution, washing recovered liquid is obtained, and the recovered liquid is recycled to the scrubbing tower 2.
The deoxidation denitrification column 5 is a kind of tower equipment, and feature is cell structure, disposes filler, gas in order
Bottom in and top out passes sequentially through the adsorbent being fixed on bed.
The hydration reactor I9 and hydration reactor II13 is made of stainless steel and has form, and form is by high pressure resistant
Glass is made；Temperature needed for the hydration reactor I9 and hydration reactor II13 provides hydration reaction by constant temperature air bath
Degree condition.
Certain density gas hydrate accelerant is added in the hydration reactor I9 and hydration reactor II13, is used
In the generating process for accelerating carbon dioxide hydrate, realize that hydrate quickly generates.
The scrubbing tower 2 is connected to by valve 4 with flash tank 6.The stripper 12 is connected to condenser 14, is used
Mouth steam obtains recovered liquid by condensation, and then is delivered to the scrubbing tower 2.
A kind of bio-natural gas efficient purifying system of the present invention and purification method, comprising the following steps:
(1) bio-natural gas enters scrubbing tower 2 by gas source 1, removes hydrogen sulfide and part titanium dioxide in bio-natural gas
Carbon gas；Exit gas in scrubbing tower 2 is compressed by compressor 3, is obtained compression biological natural gas, is entered back into deoxidation denitrogenation
In tower 5, for removing nitrogen and a small amount of oxygen in bio-natural gas；
(2) deoxidation denitrification column 5 is connected to by gas booster I and valve 8 with hydration reactor I9, the outlet of deoxidation denitrification column 5
Gas passes through gas booster I7, enters hydration reactor I9 by valve 8 after pressurization, generates carbon dioxide hydrate and removes
Partial CO 2 gas；
(3) exit gas of hydration reactor I9 enters hydration reactor by valve 11 after pressurization through gas booster II13
II13 is handled again, is generated carbon dioxide hydrate by hydration reaction and is removed the carbon dioxide gas in bio-natural gas
Body；Bio-natural gas enters in caisson 16 through valve 15, and the high-efficient purification of bio-natural gas is realized by multistep treatment；
(4) cleaning solution that foreign gas is absorbed in scrubbing tower 2 enters flash tank 6 by valve 4, absorbs impurity for removing
Partial impurities gas in the cleaning solution of gas, the rich solution being purified；Flash tank 6 is connected to stripper 12, and cleaning solution is again
It into stripper 12, for removing the foreign gas in cleaning solution, is condensed by condenser 14, obtains washing recovered liquid, simultaneously
Washing recovered liquid scrubbing tower can be delivered to recycle；
(5) by step (1), (2), (3), (4), make bio-natural gas by scrubbing tower 2, compressor 3, deoxidation denitrification column 5, dodge
The processing of the links such as steaming pot 6, gas booster I7, hydration reactor I9, gas booster II10, hydration reactor II13, it is real
The high-efficient purification of existing bio-natural gas；
(6) cleaning solution of foreign gas is absorbed by flash tank 6, stripper 12, condenser 14 etc., obtains washing recovered liquid,
Recycling for cleaning solution is realized, the economy of bio-natural gas purification system is further improved；
(7) according to the ingredient of bio-natural gas, multistep treatment through the above steps realizes the high-efficient purification of bio-natural gas,
And then obtain high-purity methane.
Basic principles and main features and advantages of the present invention of the invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (3)
1. a kind of bio-natural gas efficient purifying system, it is characterised in that: including gas source (1), scrubbing tower (2), compressor (3),
Deoxidation denitrification column (5), flash tank (6), gas booster I(7), hydration reactor I(9), gas booster II(10), stripper
(12), hydration reactor II(13), condenser (14), caisson (16), cleaning solution recycling can (17)；Scrubbing tower (2) and gas
Source (1) connection；Scrubbing tower (2) is connected to by compressor (3) with deoxidation denitrification column (5), and the exit gas of deoxidation denitrification column (5) is logical
It crosses after gas booster I pressurization and enters hydration reactor I(9 through valve (8))；Hydration reactor I(9) exit gas through gas
Booster II(10) enter hydration reactor II(13 through valve (11) after secondary booster)；Gas through hydration reactor II(13) again
After secondary processing, enter caisson (16) by valve (15)；Cleaning solution circulation and stress device includes flash tank (6), stripper
(12), flash tank (6) is connected to by valve (4) with scrubbing tower (2), and the outlet vapor of stripper (12) is condensed through condenser (14)
After enter cleaning solution recycling can (17).
2. bio-natural gas efficient purifying system according to claim 1, it is characterised in that: the gas booster I
(7) the bio-natural gas pressure provided is 1.5 ~ 2.4MPa；The gas booster II(10) provide bio-natural gas pressure
Power is 2.0 ~ 2.8MPa.
3. a kind of bio-natural gas efficient purifying system and purification method, which comprises the following steps:
(1) bio-natural gas is entered scrubbing tower (2) by gas source (1), removes the hydrogen sulfide in bio-natural gas and part two
Carbon oxide gas；Exit gas in scrubbing tower (2) is compressed by compressor (3), is obtained compression biological natural gas, is entered back into
In deoxidation denitrification column (5), for removing nitrogen and a small amount of oxygen in bio-natural gas；
(2) deoxidation denitrification column (5) is connected to by gas booster I and valve (8) with hydration reactor I(9), deoxidation denitrification column
(5) exit gas passes through gas booster I(7), enter hydration reactor I(9 by valve (8) after pressurization), generate dioxy
Change Kohlenhydrate and removes part carbon dioxide gas；
(3) hydration reactor I(9) exit gas through gas booster II(13), after pressurization by valve (11) enter be hydrated
Reactor II(13) it is handled again, two in bio-natural gas are removed by hydration reaction generation carbon dioxide hydrate
Carbon oxide gas；Bio-natural gas enters in caisson (16) through valve (15), realizes by multistep treatment biological natural
The high-efficient purification of gas；
(4) cleaning solution that foreign gas is absorbed in scrubbing tower (2) enters flash tank (6) by valve (4), absorbs for removing
Partial impurities gas in the cleaning solution of foreign gas, the rich solution that is purified；Flash tank (6) is connected to stripper (12),
Cleaning solution is again introduced into stripper (12), for removing the foreign gas in cleaning solution, condenses, is washed by condenser (14)
Recovered liquid is washed, while washing recovered liquid can be delivered to scrubbing tower and recycled；
(5) by step (1), (2), (3), (4), make bio-natural gas by scrubbing tower (2), compressor (3), deoxidation denitrification column
(5), flash tank (6), gas booster I(7), hydration reactor I(9), gas booster II(10), hydration reactor II(13)
Etc. links processing, realize the high-efficient purification of bio-natural gas；
(6) cleaning solution of foreign gas is absorbed by flash tank (6), stripper (12), condenser (14) etc., obtains washing back
Liquid is received, recycling for cleaning solution is realized, further improves the economy of bio-natural gas purification system；
(7) according to the ingredient of bio-natural gas, multistep treatment through the above steps realizes the high-efficient purification of bio-natural gas,
And then obtain high-purity methane.
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