CN108165318A - The purification method of coal gas - Google Patents
The purification method of coal gas Download PDFInfo
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- CN108165318A CN108165318A CN201710590825.7A CN201710590825A CN108165318A CN 108165318 A CN108165318 A CN 108165318A CN 201710590825 A CN201710590825 A CN 201710590825A CN 108165318 A CN108165318 A CN 108165318A
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- molecular sieve
- zsm
- logistics
- benzene
- coal gas
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- 239000003034 coal gas Substances 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000000746 purification Methods 0.000 title claims abstract description 30
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims abstract description 238
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 claims abstract description 112
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims abstract description 46
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims abstract description 25
- 150000004945 aromatic hydrocarbons Chemical class 0.000 claims abstract description 24
- 239000000571 coke Substances 0.000 claims abstract description 24
- 238000010521 absorption reaction Methods 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 claims description 89
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 85
- 239000002808 molecular sieve Substances 0.000 claims description 79
- 239000003463 adsorbent Substances 0.000 claims description 52
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims description 47
- 229910000037 hydrogen sulfide Inorganic materials 0.000 claims description 47
- 239000010457 zeolite Substances 0.000 claims description 26
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 24
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 15
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 claims description 14
- 229910021529 ammonia Inorganic materials 0.000 claims description 12
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 claims description 10
- YTPLMLYBLZKORZ-UHFFFAOYSA-N Thiophene Chemical compound C=1C=CSC=1 YTPLMLYBLZKORZ-UHFFFAOYSA-N 0.000 claims description 10
- MWPLVEDNUUSJAV-UHFFFAOYSA-N anthracene Chemical compound C1=CC=CC2=CC3=CC=CC=C3C=C21 MWPLVEDNUUSJAV-UHFFFAOYSA-N 0.000 claims description 10
- QMMFVYPAHWMCMS-UHFFFAOYSA-N Dimethyl sulfide Chemical compound CSC QMMFVYPAHWMCMS-UHFFFAOYSA-N 0.000 claims description 9
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 9
- 150000003568 thioethers Chemical class 0.000 claims description 7
- FYGHSUNMUKGBRK-UHFFFAOYSA-N 1,2,3-trimethylbenzene Chemical compound CC1=CC=CC(C)=C1C FYGHSUNMUKGBRK-UHFFFAOYSA-N 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 229910021536 Zeolite Inorganic materials 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 6
- 241000269350 Anura Species 0.000 claims description 5
- 230000003009 desulfurizing effect Effects 0.000 claims description 5
- 229930192474 thiophene Natural products 0.000 claims description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 4
- 230000000737 periodic effect Effects 0.000 claims description 4
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 claims description 3
- 239000003245 coal Substances 0.000 claims description 3
- 229910052746 lanthanum Inorganic materials 0.000 claims description 3
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 239000008096 xylene Substances 0.000 claims description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 2
- 229910052684 Cerium Inorganic materials 0.000 claims description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 2
- 239000011575 calcium Substances 0.000 claims description 2
- 229910052791 calcium Inorganic materials 0.000 claims description 2
- 239000011777 magnesium Substances 0.000 claims description 2
- 229910052749 magnesium Inorganic materials 0.000 claims description 2
- 229910052709 silver Inorganic materials 0.000 claims description 2
- 239000004332 silver Substances 0.000 claims description 2
- 229910052720 vanadium Inorganic materials 0.000 claims description 2
- 229910052727 yttrium Inorganic materials 0.000 claims description 2
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims description 2
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims 1
- 239000002594 sorbent Substances 0.000 claims 1
- 238000010248 power generation Methods 0.000 abstract description 24
- 238000001816 cooling Methods 0.000 abstract description 4
- 238000009776 industrial production Methods 0.000 abstract 1
- 238000002485 combustion reaction Methods 0.000 description 17
- 230000006835 compression Effects 0.000 description 16
- 238000007906 compression Methods 0.000 description 16
- 238000006477 desulfuration reaction Methods 0.000 description 15
- 230000023556 desulfurization Effects 0.000 description 15
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 8
- 238000011084 recovery Methods 0.000 description 7
- 239000012629 purifying agent Substances 0.000 description 6
- -1 ZSM molecular sieve class Chemical class 0.000 description 5
- 238000001914 filtration Methods 0.000 description 5
- 239000000446 fuel Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- LELOWRISYMNNSU-UHFFFAOYSA-N hydrogen cyanide Chemical compound N#C LELOWRISYMNNSU-UHFFFAOYSA-N 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 239000005864 Sulphur Substances 0.000 description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 239000011701 zinc Substances 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 239000011609 ammonium molybdate Substances 0.000 description 2
- APUPEJJSWDHEBO-UHFFFAOYSA-P ammonium molybdate Chemical compound [NH4+].[NH4+].[O-][Mo]([O-])(=O)=O APUPEJJSWDHEBO-UHFFFAOYSA-P 0.000 description 2
- 229940010552 ammonium molybdate Drugs 0.000 description 2
- 235000018660 ammonium molybdate Nutrition 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 125000001741 organic sulfur group Chemical group 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- ZOIORXHNWRGPMV-UHFFFAOYSA-N acetic acid;zinc Chemical compound [Zn].CC(O)=O.CC(O)=O ZOIORXHNWRGPMV-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- UNTBPXHCXVWYOI-UHFFFAOYSA-O azanium;oxido(dioxo)vanadium Chemical compound [NH4+].[O-][V](=O)=O UNTBPXHCXVWYOI-UHFFFAOYSA-O 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- ZMIGMASIKSOYAM-UHFFFAOYSA-N cerium Chemical compound [Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce] ZMIGMASIKSOYAM-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- OPQARKPSCNTWTJ-UHFFFAOYSA-L copper(ii) acetate Chemical compound [Cu+2].CC([O-])=O.CC([O-])=O OPQARKPSCNTWTJ-UHFFFAOYSA-L 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 229940046892 lead acetate Drugs 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 238000009992 mercerising Methods 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 229910052680 mordenite Inorganic materials 0.000 description 1
- DOLZKNFSRCEOFV-UHFFFAOYSA-L nickel(2+);oxalate Chemical compound [Ni+2].[O-]C(=O)C([O-])=O DOLZKNFSRCEOFV-UHFFFAOYSA-L 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000004246 zinc acetate Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/002—Removal of contaminants
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/002—Removal of contaminants
- C10K1/003—Removal of contaminants of acid contaminants, e.g. acid gas removal
- C10K1/004—Sulfur containing contaminants, e.g. hydrogen sulfide
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/32—Purifying combustible gases containing carbon monoxide with selectively adsorptive solids, e.g. active carbon
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention relates to a kind of purification method of coal gas, it is unclean mainly to solve sulfide in coke oven gas purification in the prior art, tar, benzene and naphthalene removing, causes the technical issues of compressor cooling pipe easily blocks, sulfur dioxide (SO2) emissions are exceeded.The present invention is by using including the following steps：A. the coal gas from coke-oven plant forms logistics I by slightly de- benzene unit；B. logistics I enters comprehensive purifying tower, and the aromatic hydrocarbons and sulfide in coal gas are fallen in absorption, form logistics II；C. after logistics II enters compressor compresses, the technical solution of gas turbine power generation is sent to, preferably solves the problems, such as this, in the industrial production available for coke-stove gas power generation.
Description
Technical field
The present invention relates to a kind of purification methods of coal gas, the particularly purification method for the coke-stove gas of fuel engine power generation.
Background technology
Coke-stove gas be mainly coke-oven plant's by-product containing hydro carbons, methane, hydrogen high thermal energy fuel gas, generally as
Fuel gas generation uses.Since the thermal efficiency of fuel engine power generation is higher than steam turbine, combustion is selected in the coke-stove gas power generation of general coke-oven plant
Machine generates electricity.But fuel engine power generation is higher to the purity requirement of coal gas, to remove benzene,toluene,xylene, naphthalene, coke in coke-stove gas
The organic matters such as oil prevent from blocking combustion engine nozzle, also to remove the sulfide in coke-stove gas, prevent the flue gas titanium dioxide after burning
Sulphur emissions are exceeded, and nitride is exceeded in order to prevent, it is also necessary to remove the ammonia in coke-stove gas.So before gas-fired power generation,
It is purified, removes aromatic hydrocarbons, tar, sulfide, ammonia carried in coal gas etc..
Existing fine purification technique for coke oven gas first removes the hydrogen sulfide in coke-stove gas, Ran Houyong with iron oxide adsorbent
Activated carbon removes naphthalene therein, removes benzene therein with activated carbon again, is then fed into fuel engine power generation, but deviate from hydrogen sulfide, benzene,
The effect of naphthalene is bad.
Document CN201410651179.7 discloses a kind of method of coke oven gas purification, and process is：Coke-stove gas passes through
Primary cooler is cooled to 300~500 DEG C with water indirectly, and dehydrating tower, which is dehydrated to 5~10ppm of water content, enters tar recovery tower, condensation
It is precipitated outside tar liquid and arranges, be cooled to outside -30~-50 DEG C of precipitation liquid ammonias and arrange into liquefied ammonia recovery tower, by Methanol Wash Column
Imurity-removal, clean coke-stove gas is into clean coal gas tank.The device of coke oven gas purification includes primary cooler, dehydrating tower, tar recycling
Tower, liquefied ammonia recovery tower and Methanol Wash Column are simultaneously sequentially connected.Tar recovery tower and liquefied ammonia recovery tower respectively with liquid carbon dioxide
Pipeline connects, and the bottom of towe outlet of tar recovery tower is connect with tar reclaimer, and bottom of towe outlet and the liquefied ammonia of liquefied ammonia recovery tower return
Receiving unit connects.The invention is by cooling down, being dehydrated, separating tar and ammonia, then through methanol washing process, removes the impurity in coal gas
And harmful substance, without reference to using adsorbent purifying coke oven gas.
Document CN201210012179.3 is related to a kind of gas turbine power generation coke-stove gas comprehensive purification system and its purification
Method, gas turbine power generation coke-stove gas comprehensive purification system, the coke-stove gas in gas pipe is successively through desulphurization system, compressor
Filtration system and gas filtering system enter in gas turbine, and desulphurization system is that four groups of dry desulfurizing towers are connected in parallel on gas pipe, pressure
Contracting machine filtration system is connected on from the first appendix that desulphurization system comes out by four compressor filters；It is comprehensive using coal gas
The purification method of cleaning system is closed, is included the following steps：A, by coal gas desulfurization；B, by the coal gas filtered compressed obtained by step a；c、
By coal gas equipressure heating obtained by step b；D, by coal gas pre-filtering obtained by step c；E, it by coal gas essence filtering obtained by step d, obtains
Meet the coal gas of combustion engine requirement.Present system newly sets four groups of dry desulfurizing towers, with the present invention on the basis of crude benzol purified treatment
One is tower while desulfurization takes off benzene difference.
Document CN201110250178.8 reports a kind of Multifunctional raw gas purifying agent and its methods for making and using same.It should
Multifunctional raw gas purifying agent using activated alumina as carrier, load ammonium molybdate, while load copper acetate, zinc acetate, lead acetate,
1~2 kind in nickel oxalate, ammonium metavanadate, while the one kind being also loaded in magnesium chloride, potassium carbonate, sodium carbonate is made, this is multi-functional
The former composition of raw material gas purifying agent is in terms of carrier quality, and the ammonium molybdate of load is the 1%~10% of carrier quality, other 2~3 kinds
Metallic compound total amount is the 10%~25% of carrier quality.The preparation method of the Multifunctional raw gas purifying agent is first to use metal
Compound solution impregnated carrier 2~6 hours, 2~4 hours dry by 120 DEG C, 280~350 DEG C of roastings are made after 4~6 hours
Obtain the multifunctional purifying agent.The Multifunctional raw gas purifying agent is for water-gas, semiwater gas, coke-stove gas or IGCC power generation combustions
COS, CS are purified in gas unstripped gas2、HCN、SO2、SO3And O2Wait impurity, wherein COS, CS2、HCN、SO2、SO3Conversion ratio >=
90%, O2Removal efficiency >=95%.The document does not have been reported that cleanser has suction-operated to aromatic hydrocarbons.
The prior art using the report of molecular sieve adsorbent purification coal gas, is not more disclosed and is adsorbed using molecular sieve
Agent, while the report of sulfide and aromatic hydrocarbons is removed, gas purifying method of the present invention removes sulfide and aromatic hydrocarbons, is directed to completely
Property solves that presently, there are the sordid technical problems of gas purification.
Invention content
The technical problems to be solved by the invention are mainly to solve to vulcanize in gas purification in the prior art in the prior art
Object, tar, benzene and naphthalene removing be not clean, causes the technical issues of compressor cooling pipe easily blocks, sulfur dioxide (SO2) emissions are exceeded,
The present invention provides a kind of new coke oven gas purification method.This method is used in the production using coke-stove gas power generation, and coal gas is net
The advantages of change is clean, and sulphur emissions are low, and power generator is stable.
In order to solve the above technical problems, the technical solution adopted by the present invention is as follows：A kind of purification method of coal gas, including with
Lower step：
A. the coke-stove gas that coke oven comes out enters slightly de- benzene unit, slightly forms logistics I after de- benzene；Wherein, it slightly takes off benzene and uses and divide
Sub- sieve adsorbant A takes off benzene by the method for absorption；
B. logistics I enters comprehensive purifying tower, molecular sieve adsorbent B is contained in the comprehensive purifying tower, while remove coal
Remaining aromatic hydrocarbons and sulfide in gas form logistics II；
C. logistics II enters subsequent use coal gas workshop section.
In above-mentioned technical proposal, preferred technical solution is the logistics I before comprehensive purifying tower is entered, into thick
Desulfurizing tower removes the hydrogen sulfide of part.
In above-mentioned technical proposal, preferred technical solution for the logistics I enter comprehensive purifying tower before, into water
Gas separating device removes the moisture in coke-stove gas.
In above-mentioned technical proposal, preferred technical solution is selected from for the adsorbent of molecular sieve A selected from X-type point
Sub- sieve, Y type molecular sieve, A type molecular sieve, ZSM types molecular sieve, modenite, beta molecular sieve, SAPO types molecular sieve, MCM-22,
MCM-49, MCM-56, ZSM-5/ modenite, ZSM-5/ β zeolites, ZSM-5/Y, MCM-22/ modenite, ZSM-5/
In Magadiite, ZSM-5/ β zeolite/modenite, ZSM-5/ β zeolites/Y zeolites or ZSM-5/Y zeolites/modenite extremely
Few one kind.
In above-mentioned technical proposal, preferred technical solution is that molecular sieve is selected from X-type molecule in the adsorbent of molecular sieve B
Sieve, Y type molecular sieve, A type molecular sieve, ZSM types molecular sieve, modenite, beta molecular sieve, SAPO types molecular sieve, MCM-22,
MCM-49, MCM-56, ZSM-5/ modenite, ZSM-5/ β zeolites, ZSM-5/Y, MCM-22/ modenite, ZSM-5/
In Magadiite, ZSM-5/ β zeolite/modenite, ZSM-5/ β zeolites/Y zeolites or ZSM-5/Y zeolites/modenite extremely
Few one kind；The silica alumina ratio of the molecular sieve is more than 10.
In above-mentioned technical proposal, preferred technical solution is the adsorbent of molecular sieve A and adsorbent of molecular sieve B is can
Reproducing adsorbent is continuing with after being regenerated 3 ~ 60 hours at 100 ~ 600 DEG C.
In above-mentioned technical proposal, preferred technical solution is that the molecular sieve adsorbent B is that hydrophobic type molecular sieve is inhaled
Attached dose.
In above-mentioned technical proposal, preferred technical solution is to contain the periodic table of elements in the molecular sieve adsorbent B
In at least one of the Ith A, II A, V A, I B, II B, III B, IV B, V B, VI B, VII B or the VIIIth race's element element.Above-mentioned skill
In art scheme, preferred technical solution is that the IIth element A is selected from least one of magnesium and calcium in the periodic table of elements；The
I B races element is selected from least one of copper, silver；IIIth B races element is selected from least one of lanthanum, cerium, yttrium.
In above-mentioned technical proposal, preferred technical solution is that molecular sieve divides selected from X-type in the molecular sieve adsorbent B
Sub- sieve, Y type molecular sieve, A type molecular sieve, ZSM types molecular sieve, modenite, beta molecular sieve, SAPO types molecular sieve, MCM-22,
MCM-49, MCM-56, ZSM-5/ modenite, ZSM-5/ β zeolites, ZSM-5/Y, MCM-22/ modenite, ZSM-5/
In Magadiite, ZSM-5/ β zeolite/modenite, ZSM-5/ β zeolites/Y zeolites or ZSM-5/Y zeolites/modenite extremely
Few one kind.
In above-mentioned technical proposal, preferred technical solution is that ZSM type molecular sieves are selected from the molecular sieve adsorbent B
Including at least one of ZSM-5, ZSM-23, ZSM-11, ZSM-48.
In above-mentioned technical proposal, preferred technical solution is removed in coal gas simultaneously for the molecular sieve adsorbent B
Tar, cyanide, ammonia.
In above-mentioned technical proposal, preferred technical solution is that the aromatic hydrocarbons is benzene,toluene,xylene, ethylbenzene, front three
At least one of benzene, naphthalene, anthracene, Kun；Sulfide is hydrogen sulfide, sulfur dioxide, mercaptan, thioether, thiophene, methyl mercaptan, methyl
At least one of thioether.
In above-mentioned technical proposal, preferred technical solution is benzene concentration in logistics I in 100~1000mg/m3Between, naphthalene is dense
Degree is in 100~500mg/m3Between.
It is known in the art, during gas purification process, coal gas is purified using traditional handicraft, using in desulfurizing tower
It is middle to use iron oxide desulfurization；Using in de- naphthalene tower naphthalene is taken off with activated carbon；Benzene is taken off with activated carbon using debenzolizing tower again；3 are used altogether
A absorbing unit, purifies coal gas successively.In device operation, device exit hydrogen sulfide, benzene and naphthalene are dense, compressor cooling
Pipeline is frequently occluded, and is needed to shut down and be dredged, influences production efficiency.Method using the present invention, has the following advantages that：（1）It uses
Benzene, naphthalene and hydrogen sulfide, organic sulfur can thoroughly be removed totally, solve the problems, such as line clogging by adsorbent of molecular sieve.（2）
Adsorbent is subjected to multifunction, can desulfurization simultaneously, de- benzene, de- naphthalene, in an adsorption tower, comprehensive purifying mistake can be carried out at the same time
Journey reduces the quantity of adsorption tower, reduces production cost in this way.
Technical solution using the present invention：The coke-stove gas that coke oven comes out enters slightly de- benzene unit, is inhaled using molecular sieve
Attached dose removes part benzene and part aromatic hydrocarbons, and comprehensive purifying tower is slightly entered after de- benzene, contains molecular sieve adsorbent in purifying column, together
When removing fall coal gas in aromatic hydrocarbons and sulfide, after entering back into compressor compresses, be sent to gas turbine power generation.It is adopted due to slightly taking off benzene
With molecular sieve adsorbent, the benzene of removing and other aromatic hydrocarbons efficiency are higher, and the organic efficiency of crude benzol greatly improves, and also mitigates
The amount of benzene is taken off at comprehensive purifying tower, comprehensive purifying tower exit hydrogen sulfide content is 0 mg/m3, naphthalene content is 0 mg/m3, tar
Content is 0, and the organic sulfur carried in gas is also removed, in combustion engine flue gas sulfur dioxide (SO2) emissions in 10m hereinafter, device operation is steady
It is fixed, achieve preferable technique effect.
Description of the drawings
The coke oven gas purification flow diagram of the present invention that Fig. 1 is.
In Fig. 1,1 coke-stove gas for coke oven, 2 be logistics I, i.e., slightly takes off the coke-stove gas after benzene, and 3 be logistics II；4
It is logistics IV for logistics III, 5；
I is de- crude benzol tower, and II is moisture separator, and III is comprehensive purifying tower, and IV is gas compression pump, and V is fuel engine power generation machine.
The present invention will be further described below by way of examples, but is not limited only to the present embodiment.
Specific embodiment
【Embodiment 1】
As shown in Figure 1, the coke-stove gas that coke oven comes out enters slightly de- benzene unit, slightly forms logistics I after de- benzene, wherein, slightly
De- benzene takes off benzene using Y zeolite adsorbents by the method for absorption；Benzene concentration is in 200mg/m wherein in logistics I3Between,
Naphthalene concentration is in 100mg/m3Between, concentration of hydrogen sulfide is in 500mg/m3Between；Logistics I enters comprehensive purifying tower, and the synthesis is net
Change containing ZSM molecular sieve class adsorbent in tower, while remove the aromatic hydrocarbons and sulfide in coal gas, form logistics II, logistics II
Middle benzene concentration is less than 100mg/m3, naphthalene concentration is less than 4 mg/m3Between, concentration of hydrogen sulfide is less than 4mg/m3；Logistics II enters compression
After machine compression, it is sent to gas turbine power generation, device continuous operation 3 months or more, comprehensive purifying tower exit benzene, naphthalene, hydrogen sulfide
Concentration is stablized, and gas compression pump does not occur plugging phenomenon yet, and sulfur dioxide concentration is less than 10mg/m in the exhaust emissions of combustion engine3。
【Embodiment 2】
The coke-stove gas that coke oven comes out enters slightly de- benzene unit, and subsequently into thick desulfurization unit, logistics I is formed after thick desulfurization,
Wherein, slightly de- benzene using mordenite molecular sieve adsorbent, takes off benzene by the method for absorption；Wherein benzene concentration is in logistics I
600mg/m3, a concentration of 50mg/m of naphthalene3, concentration of hydrogen sulfide 200mg/m3；Logistics I enters comprehensive purifying tower, and the synthesis is net
Change containing ZSM molecular sieve class adsorbent in tower, while remove the aromatic hydrocarbons and sulfide in coal gas, form logistics II, logistics II
Middle benzene concentration is less than 50mg/m3, naphthalene concentration is less than 2mg/m3Between, concentration of hydrogen sulfide is less than 2mg/m3；Logistics II enters compressor
After compression, it is sent to gas turbine power generation, device continuous operation 4 months or more, comprehensive purifying tower exit benzene, naphthalene, hydrogen sulfide are dense
Degree is stablized, and gas compression pump does not occur plugging phenomenon yet, and sulfur dioxide concentration is less than 7mg/m in the exhaust emissions of combustion engine3。
【Embodiment 3】
The coke-stove gas that coke oven comes out enters thick desulfurization unit, subsequently into thick de- benzene unit, slightly forms logistics I after de- benzene,
Slightly de- benzene is using 13X adsorbent of molecular sieve, and benzene concentration is 500mg/m wherein in logistics I3, a concentration of 40mg/m of naphthalene3, hydrogen sulfide is dense
Degree is in 2000mg/m3Between；Logistics I enters comprehensive purifying tower, contains Y molecular sieve class adsorbent in the comprehensive purifying tower,
The aromatic hydrocarbons and sulfide in coal gas are fallen in removing simultaneously, form logistics II, and benzene concentration is less than 60mg/m in logistics II3, naphthalene concentration is small
In 1 mg/m3Between, concentration of hydrogen sulfide is less than 1mg/m3；Concentration in toluene, dimethylbenzene, ethylbenzene, trimethylbenzene, naphthalene, anthracene, Kun is small
In 1 mg/m3Between；Sulfide is hydrogen sulfide, dense in sulfur dioxide, mercaptan, thioether, thiophene, methyl mercaptan, Dimethyl sulfide
Degree is less than 1 mg/m3Between.
After logistics II enters compressor compresses, it is sent to gas turbine power generation, device continuous operation 3 months or more is comprehensive net
Hua Ta exits benzene, naphthalene, concentration of hydrogen sulfide are stablized, and gas compression pump does not occur plugging phenomenon yet, two in the exhaust emissions of combustion engine
Sulfur oxide concentration is less than 5mg/m3。
【Embodiment 4】
The coke-stove gas that coke oven comes out enters slightly de- benzene unit, slightly forms logistics I after de- benzene, slightly de- benzene uses ZSM-5 molecules
Benzene concentration is 400mg/m in sieve adsorbant, wherein logistics I3, a concentration of 80mg/m of naphthalene3, concentration of hydrogen sulfide is in 1000mg/m3；Object
Stream I enters comprehensive purifying tower, the Y molecular sieve class adsorbent being modified in the comprehensive purifying tower containing copper, while removes coal
Aromatic hydrocarbons and sulfide in gas form logistics II, and benzene concentration is less than 60mg/m in logistics II3, naphthalene concentration is less than 1 mg/m3Between,
Concentration of hydrogen sulfide is less than 1mg/m3；After logistics II enters compressor compresses, it is sent to gas turbine power generation, device continuous operation 3
Month or more, comprehensive purifying tower exit benzene, naphthalene, concentration of hydrogen sulfide are stablized, and gas compression pump does not occur plugging phenomenon yet, combustion engine
Sulfur dioxide concentration is less than 5mg/m in exhaust emissions3。
【Embodiment 5】
The coke-stove gas that coke oven comes out enters slightly de- benzene unit, slightly forms logistics I after de- benzene, slightly de- benzene uses 13X molecular sieves
With Y molecular sieve mixed adsorbent, benzene concentration is in 1200mg/m wherein in logistics I3, naphthalene concentration is in 200~500mg/m3Between, sulphur
Change hydrogen concentration in 100~500mg/m3Between；Logistics I enters comprehensive purifying tower, contains zinc modification in the comprehensive purifying tower
ZSM-5 molecular sieve class adsorbent, while remove fall coal gas in aromatic hydrocarbons and sulfide, formed logistics II, benzene is dense in logistics II
Degree is less than 60mg/m3, naphthalene concentration is less than 1 mg/m3Between, concentration of hydrogen sulfide is less than 1mg/m3；Toluene, dimethylbenzene, ethylbenzene, front three
Concentration in benzene, naphthalene, anthracene, Kun is less than 1 mg/m3Between；Sulfide is hydrogen sulfide, sulfur dioxide, mercaptan, thioether, thiophene, first
Concentration in base mercaptan, Dimethyl sulfide is less than 1 mg/m3Between.After logistics II enters compressor compresses, it is sent to gas turbine hair
Electricity, device continuous operation 3 months or more, comprehensive purifying tower exit benzene, naphthalene, concentration of hydrogen sulfide are stablized, and gas compression pump is not yet
There is plugging phenomenon, sulfur dioxide concentration is less than 5mg/m in the exhaust emissions of combustion engine3。
【Embodiment 6】
The coke-stove gas that coke oven comes out enters slightly de- benzene unit, slightly logistics I is formed after de- benzene, using ZSM-5 molecular sieve and Y points
Son sieve mixed adsorbent, benzene concentration is in 1000~3500mg/m wherein in logistics I3Between, naphthalene concentration is in 200~500mg/m3It
Between, concentration of hydrogen sulfide is in 100~500mg/m3Between；Logistics I enters comprehensive purifying tower, contains copper in the comprehensive purifying tower
Modified ZSM-5 molecular sieve and the Y molecular sieve class adsorbent of zinc modification, while remove aromatic hydrocarbons and sulfide in coal gas, shape
Into logistics II, benzene concentration is less than 60mg/m in logistics II3, naphthalene concentration is less than 1 mg/m3Between, concentration of hydrogen sulfide is less than 1mg/m3；
After logistics II enters compressor compresses, it is sent to gas turbine power generation, device continuous operation 3 months or more, the outlet of comprehensive purifying tower
Locate benzene, naphthalene, concentration of hydrogen sulfide to stablize, gas compression pump does not occur plugging phenomenon yet, and sulfur dioxide is dense in the exhaust emissions of combustion engine
Degree is less than 5mg/m3。
【Embodiment 7】
The coke-stove gas that coke oven comes out enters slightly de- benzene unit, slightly forms logistics I after de- benzene, the 13X molecules being modified using copper
Sieve and Y molecular sieve mixed adsorbent, benzene concentration is in 1000~3500mg/m wherein in logistics I3Between, naphthalene concentration 200~
500mg/m3Between, concentration of hydrogen sulfide is in 100~500mg/m3Between；Logistics I enters comprehensive purifying tower, the comprehensive purifying
The Y molecular sieve class adsorbent of ZSM-5 molecular sieve and zinc modification containing copper modification in tower, the sial of wherein ZSM-5 molecular sieve rub
, than being more than 100, the silica alumina ratio of Y molecular sieve is more than 20 for you.Adsorbent removes aromatic hydrocarbons and sulfide in coal gas, shape simultaneously
Into logistics II, benzene concentration is less than 60mg/m in logistics II3, naphthalene concentration is less than 1 mg/m3Between, concentration of hydrogen sulfide is less than 1mg/m3；
After logistics II enters compressor compresses, it is sent to gas turbine power generation, device continuous operation 3 months or more, the outlet of comprehensive purifying tower
Locate benzene, naphthalene, concentration of hydrogen sulfide to stablize, gas compression pump does not occur plugging phenomenon yet, and sulfur dioxide is dense in the exhaust emissions of combustion engine
Degree is less than 5mg/m3。
【Embodiment 8】
The coke-stove gas that coke oven comes out enters slightly de- benzene unit, slightly logistics I is formed after de- benzene, using ZSM-5 molecular sieve and Y points
Son sieve mixed adsorbent, benzene concentration is in 200mg/m wherein in logistics I3, naphthalene concentration is in 50mg/m3, concentration of hydrogen sulfide is in 2000mg/
m3；The entrance comprehensive purifying tower of logistics I, the interior Y molecular sieve class adsorbent being modified containing Rare Earth Lanthanum of the comprehensive purifying tower, simultaneously
The aromatic hydrocarbons and sulfide in coal gas are fallen in removing, form logistics II, and benzene concentration is less than 60mg/m in logistics II3, naphthalene concentration is less than 1
mg/m3Between, concentration of hydrogen sulfide is less than 1mg/m3；After logistics II enters compressor compresses, gas turbine power generation is sent to, device connects
Reforwarding row 3 months or more, comprehensive purifying tower exit benzene, naphthalene, concentration of hydrogen sulfide are stablized, and gas compression pump does not occur plugging yet and shows
As sulfur dioxide concentration is less than 5mg/m in the exhaust emissions of combustion engine3。
【Embodiment 9】
The coke-stove gas that coke oven comes out enters slightly de- benzene unit, and subsequently into thick desulfurization unit, logistics I is formed after thick desulfurization,
Using hydrophobic ZSM-5 molecular sieve adsorbent；Benzene concentration is in 600mg/m wherein in logistics I3, naphthalene concentration is in 200mg/m3, vulcanization
Hydrogen concentration is in 2000mg/m3；Logistics I enters comprehensive purifying tower, is boiled in the comprehensive purifying tower containing ZSM molecular sieve and mercerising
Stone class adsorbent, while remove aromatic hydrocarbons and sulfide in coal gas, logistics II is formed, benzene concentration is less than 50mg/ in logistics II
m3, naphthalene concentration is less than 2mg/m3Between, concentration of hydrogen sulfide is less than 2mg/m3；After logistics II enters compressor compresses, it is sent to combustion gas wheel
Machine generates electricity, device continuous operation 4 months or more, and comprehensive purifying tower exit benzene, naphthalene, concentration of hydrogen sulfide are stablized, gas compression pump
Do not occur plugging phenomenon, sulfur dioxide concentration is less than 7mg/m in the exhaust emissions of combustion engine yet3。
【Embodiment 10】
The coke-stove gas that coke oven comes out enters slightly de- benzene unit, and subsequently into thick desulfurization unit, logistics I is formed after thick desulfurization,
Using ZSM-5 molecular sieve and Y molecular sieve mixed adsorbent, wherein benzene concentration in logistics I, 400mg/m3, naphthalene concentration is in 300mg/
m3, concentration of hydrogen sulfide is in 150mg/m3；Logistics I enters comprehensive purifying tower, in the comprehensive purifying tower containing ZSM molecular sieve and
Modenite class adsorbent, while remove aromatic hydrocarbons and sulfide in coal gas, logistics II is formed, benzene concentration is less than in logistics II
50mg/m3, naphthalene concentration is less than 2mg/m3Between, concentration of hydrogen sulfide is less than 2mg/m3；After logistics II enters compressor compresses, it is sent to
Gas turbine power generation, comprehensive purifying tower exit benzene, naphthalene, concentration of hydrogen sulfide are stablized, and gas compression pump does not occur plugging phenomenon yet,
Sulfur dioxide concentration is less than 7mg/m in the exhaust emissions of combustion engine3。
After adsorbent in comprehensive adsorption tower adsorbs a week, using regeneration of the purified coal gas at 100 DEG C or more, then
After life, the absorption property of adsorbent is stablized, and benzene concentration is less than 50mg/m in logistics II3, naphthalene concentration is less than 2mg/m3Between, vulcanization
Hydrogen concentration is less than 2mg/m3。
【Embodiment 11】
The coke-stove gas that coke oven comes out enters slightly de- benzene unit, subsequently into thick desulfurization unit, after thick desulfurization, into air water point
From device, after separating liquid water, logistics I is formed, using ZSM-5 molecular sieve and Y molecular sieve mixed adsorbent, wherein in logistics I
Benzene concentration is in 600mg/m3, naphthalene concentration is in 250mg/m3, concentration of hydrogen sulfide is in 200mg/m3；Logistics I enter comprehensive purifying tower it
Before, into moisture separator, the moisture in coke-stove gas is removed, then logistics I enters comprehensive purifying tower, the comprehensive purifying
It containing ZSM molecular sieve and modenite class adsorbent in tower, while removes the aromatic hydrocarbons and sulfide in coal gas, forms logistics
II, benzene concentration is less than 50mg/m in logistics II3, naphthalene concentration is less than 2mg/m3Between, concentration of hydrogen sulfide is less than 2mg/m3；Logistics II
Into after compressor compresses, it is sent to gas turbine power generation, device continuous operation 4 months or more, comprehensive purifying tower exit benzene,
Naphthalene, concentration of hydrogen sulfide are stablized, and gas compression pump does not occur plugging phenomenon yet, and sulfur dioxide concentration is less than in the exhaust emissions of combustion engine
7mg/m3。
【Embodiment 12】
The coke-stove gas that coke oven comes out enters slightly de- benzene unit, and subsequently into thick desulfurization unit, logistics I is formed after thick desulfurization,
Using ZSM-5 molecular sieve and Y molecular sieve mixed adsorbent, benzene concentration is 300mg/m wherein in logistics I3, a concentration of 50mg/ of naphthalene
m3, concentration of hydrogen sulfide 100mg/m3；Logistics I enters comprehensive purifying tower, in the comprehensive purifying tower containing ZSM molecular sieve and
Modenite class adsorbent, while remove aromatic hydrocarbons and sulfide in coal gas, logistics II is formed, benzene concentration is less than in logistics II
50mg/m3, naphthalene concentration is less than 2mg/m3Between, concentration of hydrogen sulfide is less than 2mg/m3；Tar, cyanide, ammonia in logistics II is dense
Degree is less than 1mg/m3。
After logistics II enters compressor compresses, it is sent to gas turbine power generation, device continuous operation 4 months or more is comprehensive net
Hua Ta exits benzene, naphthalene, concentration of hydrogen sulfide are stablized, and gas compression pump does not occur plugging phenomenon yet, two in the exhaust emissions of combustion engine
Sulfur oxide concentration is less than 7mg/m3。
【Comparative example 1】
According to method described in embodiment 1, slightly de- benzene is using solvent-extracted method, and benzene concentration is 3000mg/m in logistics I3,
Only using acticarbon in comprehensive purifying tower, the sampling analysis of logistics II, benzene concentration is in 2800mg/m3, naphthalene concentration exists
150mg/m3, concentration of hydrogen sulfide is in 260mg/m3。
Obviously, adsorbent supplement using the present invention, has effectively adsorbed benzene, naphthalene, hydrogen sulfide, ammonia, tar, hydrogen cyanide, first
Benzene, dimethylbenzene, ethylbenzene, trimethylbenzene, naphthalene, anthracene, Kun, sulfur dioxide, mercaptan, thioether, thiophene, methyl mercaptan, first and base thioether are protected
It has demonstrate,proved that purified coal gas is clean, ensure that the normal operation of electricity generation system.
Claims (10)
1. a kind of purification method of coal gas, includes the following steps：
A. the coke-stove gas that coke oven comes out enters slightly de- benzene unit, slightly forms logistics I after de- benzene；Wherein, it slightly takes off benzene and uses and divide
Sub- sieve adsorbant A takes off benzene by the method for absorption；
B. logistics I enters comprehensive purifying tower, molecular sieve adsorbent B is contained in the comprehensive purifying tower, while remove coal
Remaining aromatic hydrocarbons and sulfide in gas form logistics II；
C. logistics II enters subsequent use coal gas workshop section.
2. the purification method of coal gas according to claim 1, it is characterised in that the logistics I is entering comprehensive purifying tower
Before, into moisture separator, the moisture in coke-stove gas is removed, benzene concentration is in 100~1000mg/m in logistics I3Between, naphthalene
Concentration is in 100~500mg/m3Between.
3. the purification method of coal gas according to claim 1, it is characterised in that the logistics I is entering comprehensive purifying tower
Before, into thick desulfurizing tower, the hydrogen sulfide of part is removed.
4. the purification method of coal gas according to claim 1, it is characterised in that the adsorbent of molecular sieve A is selected from
Including X-type molecular sieve, Y type molecular sieve, A type molecular sieve, ZSM types molecular sieve, modenite, beta molecular sieve, SAPO type molecules
Sieve, MCM-22, MCM-49, MCM-56, ZSM-5/ modenite, ZSM-5/ β zeolites, ZSM-5/Y, MCM-22/ modenite,
ZSM-5/Magadiite, ZSM-5/ β zeolite/modenite, ZSM-5/ β zeolites/Y zeolites or ZSM-5/Y zeolites/modenite
At least one of.
5. the purification method of coal gas according to claim 1, it is characterised in that molecular sieve in the adsorbent of molecular sieve B
Selected from including X-type molecular sieve, Y type molecular sieve, A type molecular sieve, ZSM types molecular sieve, modenite, beta molecular sieve, SAPO types point
Sub- sieve, MCM-22, MCM-49, MCM-56, ZSM-5/ modenite, ZSM-5/ β zeolites, ZSM-5/Y, MCM-22/ modenite,
ZSM-5/Magadiite, ZSM-5/ β zeolite/modenite, ZSM-5/ β zeolites/Y zeolites or ZSM-5/Y zeolites/modenite
At least one of；The silica alumina ratio of the molecular sieve is more than 10.
6. the purification method of coal gas according to claim 1, it is characterised in that selected from packet in the adsorbent of molecular sieve B
Include at least one of the Ith A, II A, V A, I B, II B, III B, IV B, V B, VI B, VII B or the VIIIth race's element in the periodic table of elements
Element.
7. the purification method of coal gas according to claim 6, it is characterised in that the IIth element A in the periodic table of elements
Selected from least one of magnesium and calcium；Ith B races element is selected from least one of copper, silver；IIIth B races element be selected from lanthanum, cerium,
At least one of yttrium.
8. the purification method of coal gas according to claim 1, it is characterised in that ZSM types in the adsorbent of molecular sieve B
Molecular sieve, which is selected from, includes at least one of ZSM-5, ZSM-23, ZSM-11, ZSM-48, wherein the sial mole of the molecular sieve
Than being more than 100.
9. the purification method of coal gas according to claim 1, it is characterised in that the adsorbent of molecular sieve B is removed simultaneously
Tar, cyanide, ammonia in coal gas；The aromatic hydrocarbons is benzene,toluene,xylene, in ethylbenzene, trimethylbenzene, naphthalene, anthracene, Kun
It is at least one；Sulfide is at least one in hydrogen sulfide, sulfur dioxide, mercaptan, thioether, thiophene, methyl mercaptan, Dimethyl sulfide
Kind.
10. the purification method of coal gas according to claim 1, it is characterised in that the adsorbent of molecular sieve A and molecule
Sieve adsorbant B is regenerable sorbent, is continuing with after being regenerated 3 ~ 60 hours at 100 ~ 600 DEG C.
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| CN110218828A (en) * | 2019-07-15 | 2019-09-10 | 湖北申昙环保新材料有限公司 | Blast furnace gas purification method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5849604A (en) * | 1981-09-21 | 1983-03-23 | Kansai Coke & Chem Co Ltd | Purification of coke oven gas |
| CN104557388A (en) * | 2013-10-23 | 2015-04-29 | 中国石油化工股份有限公司 | Deep desulfurization method of refinery C4 |
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2017
- 2017-07-19 CN CN201710590825.7A patent/CN108165318A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5849604A (en) * | 1981-09-21 | 1983-03-23 | Kansai Coke & Chem Co Ltd | Purification of coke oven gas |
| CN104557388A (en) * | 2013-10-23 | 2015-04-29 | 中国石油化工股份有限公司 | Deep desulfurization method of refinery C4 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110218828A (en) * | 2019-07-15 | 2019-09-10 | 湖北申昙环保新材料有限公司 | Blast furnace gas purification method |
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