CN108559549A - The electricity-generating method of coke-stove gas - Google Patents
The electricity-generating method of coke-stove gas Download PDFInfo
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- CN108559549A CN108559549A CN201710590823.8A CN201710590823A CN108559549A CN 108559549 A CN108559549 A CN 108559549A CN 201710590823 A CN201710590823 A CN 201710590823A CN 108559549 A CN108559549 A CN 108559549A
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- molecular sieve
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- gas
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- 238000000034 method Methods 0.000 title claims abstract description 35
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims abstract description 172
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 claims abstract description 98
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 45
- 230000023556 desulfurization Effects 0.000 claims abstract description 45
- 238000002485 combustion reaction Methods 0.000 claims abstract description 29
- 238000010248 power generation Methods 0.000 claims abstract description 27
- 239000000571 coke Substances 0.000 claims abstract description 21
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims abstract description 18
- 150000004767 nitrides Chemical class 0.000 claims abstract description 12
- 238000005201 scrubbing Methods 0.000 claims abstract description 11
- 239000007789 gas Substances 0.000 claims description 144
- 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 73
- 239000002808 molecular sieve Substances 0.000 claims description 66
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 54
- 239000003463 adsorbent Substances 0.000 claims description 51
- 239000003034 coal gas Substances 0.000 claims description 44
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims description 43
- 229910000037 hydrogen sulfide Inorganic materials 0.000 claims description 43
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 24
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 22
- 150000004945 aromatic hydrocarbons Chemical class 0.000 claims description 20
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 claims description 18
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 12
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 claims description 12
- YTPLMLYBLZKORZ-UHFFFAOYSA-N Thiophene Chemical compound C=1C=CSC=1 YTPLMLYBLZKORZ-UHFFFAOYSA-N 0.000 claims description 12
- MWPLVEDNUUSJAV-UHFFFAOYSA-N anthracene Chemical compound C1=CC=CC2=CC3=CC=CC=C3C=C21 MWPLVEDNUUSJAV-UHFFFAOYSA-N 0.000 claims description 12
- 229910021529 ammonia Inorganic materials 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 11
- 239000010457 zeolite Substances 0.000 claims description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 10
- 229910052802 copper Inorganic materials 0.000 claims description 10
- 239000010949 copper Substances 0.000 claims description 10
- QMMFVYPAHWMCMS-UHFFFAOYSA-N Dimethyl sulfide Chemical compound CSC QMMFVYPAHWMCMS-UHFFFAOYSA-N 0.000 claims description 9
- 150000003568 thioethers Chemical class 0.000 claims description 9
- FYGHSUNMUKGBRK-UHFFFAOYSA-N 1,2,3-trimethylbenzene Chemical compound CC1=CC=CC(C)=C1C FYGHSUNMUKGBRK-UHFFFAOYSA-N 0.000 claims description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 8
- 239000000377 silicon dioxide Substances 0.000 claims description 7
- 229930192474 thiophene Natural products 0.000 claims description 6
- 230000000737 periodic effect Effects 0.000 claims description 4
- 125000000101 thioether group Chemical group 0.000 claims description 4
- 235000019738 Limestone Nutrition 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000006028 limestone Substances 0.000 claims description 3
- 229910052720 vanadium Inorganic materials 0.000 claims description 3
- 241000269350 Anura Species 0.000 claims description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 2
- 229910052684 Cerium Inorganic materials 0.000 claims description 2
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 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
- 238000000605 extraction Methods 0.000 claims description 2
- 230000002209 hydrophobic effect Effects 0.000 claims description 2
- 229910052746 lanthanum Inorganic materials 0.000 claims description 2
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 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
- 239000002594 sorbent Substances 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
- 150000001412 amines Chemical class 0.000 claims 2
- 150000001298 alcohols Chemical class 0.000 claims 1
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims 1
- 239000002904 solvent Substances 0.000 claims 1
- 238000000746 purification Methods 0.000 abstract description 17
- 238000001816 cooling Methods 0.000 abstract description 4
- 238000009776 industrial production Methods 0.000 abstract 1
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 12
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 10
- 230000006835 compression Effects 0.000 description 10
- 238000007906 compression Methods 0.000 description 10
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 8
- 230000004048 modification Effects 0.000 description 8
- 238000012986 modification Methods 0.000 description 8
- 229910052725 zinc Inorganic materials 0.000 description 8
- 239000011701 zinc Substances 0.000 description 8
- 238000011084 recovery Methods 0.000 description 7
- 239000012629 purifying agent Substances 0.000 description 6
- 239000000446 fuel Substances 0.000 description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 230000003009 desulfurizing effect Effects 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- LELOWRISYMNNSU-UHFFFAOYSA-N hydrogen cyanide Chemical compound N#C LELOWRISYMNNSU-UHFFFAOYSA-N 0.000 description 4
- 229910052761 rare earth metal Inorganic materials 0.000 description 4
- 150000002910 rare earth metals Chemical class 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
- 239000000567 combustion gas Substances 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000001179 sorption measurement Methods 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
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-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
- 238000010521 absorption reaction Methods 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
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- -1 form logistics IV Substances 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000009992 mercerising Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 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
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000008096 xylene Substances 0.000 description 2
- 241000790917 Dioxys <bee> Species 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 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
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007664 blowing Methods 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
- 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
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 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
- 150000002736 metal compounds Chemical class 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
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000002360 preparation method Methods 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
- 239000012453 solvate 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
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 1
- 238000004073 vulcanization Methods 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
- C10K1/20—Purifying combustible gases containing carbon monoxide by treating with solids; Regenerating spent purifying masses
- C10K1/205—Methods and apparatus for treating the purifying masses without their regeneration
Abstract
The present invention relates to a kind of electricity-generating method of coke-stove gas, mainly solves sulfide in coke oven gas purification in the prior art, tar, benzene and naphthalene removing not exclusively, cause the susceptible to plugging technical problem of compressor cooling pipe.The present invention is by using including the following steps：Coke-stove gas enters thick desulfurization unit, and slightly de- benzene unit, slightly forms logistics II after de- benzene；Logistics II enters moisture separator, forms logistics III；Logistics III enters comprehensive purifying tower, forms logistics IV；After logistics IV enters compressor compresses, it is sent to gas turbine combustion power generation, the tail gas after gas turbine combustion forms logistics V；Logistics V enters tail gas desulfurization denitration unit, and after scrubbing CO_2 and nitride, tail gas forms the technical solution that logistics VI is vented, and preferably solves the problems, such as this, can be used in the industrial production of coke-stove gas power generation.
Description
Technical field
The present invention relates to a kind of electricity-generating methods of coke-stove gas, are especially used for the power generation side of the coke-stove gas of fuel engine power generation
Method.
Background technology
Coke-stove gas is mainly the high thermal energy fuel gas containing hydro carbons, methane, hydrogen of coke-oven plant's by-product, 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, the ammonia etc. carried in coal gas.
Existing fine purification technique for coke oven gas first removes the hydrogen sulfide in coke-stove gas with iron oxide adsorbent, then uses
Activated carbon removes naphthalene therein, with activated carbon removes benzene therein 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
The bottom of tower outlet of piping connection, tar recovery tower is connect with tar reclaimer, and bottom of tower outlet and the liquefied ammonia of liquefied ammonia recovery tower return
Receiving unit connects.The invention removes the impurity in coal gas by cooling, dehydration, separating tar and ammonia, then through methanol washing process
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 for closing purification system, includes 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, coal gas essence obtained by step d is filtered, is obtained
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 and meanwhile desulfurization to take off benzene different.
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 O2Equal 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 does not use the report of molecular sieve adsorbent purification coal gas, does not more disclose 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 purify sordid technical problem when coal gas generates electricity.
Invention content
When the technical problem to be solved by the present invention is to use coke-stove gas power generation in the prior art, in coke oven gas purification
Sulfide, tar, benzene and naphthalene removing be not clean, causes the technology that compressor cooling pipe easily blocks, sulfur dioxide (SO2) emissions are exceeded
Problem, the present invention provide a kind of new coke oven gas purification method.In production of this method for coke-stove gas power generation, coal gas is net
Change totally, sulphur emissions are low, the stable advantage of power generator.
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 coke-stove gas, packet
Include following steps：
A. the coke-stove gas that coke oven comes out enters slightly de- benzene unit, slightly forms logistics I, wherein benzene concentration in logistics I after de- benzene
In 1000~4000mg/m3Between, naphthalene concentration is in 100~500mg/m3Between；
B. logistics I enters thick desulfurization unit, and logistics II is formed after thick desulfurization, wherein in logistics II concentration of hydrogen sulfide 100~
500mg/m3Between；
C. logistics II enters moisture separator, after removing the operative liquid moisture in coke-stove gas, forms logistics III；
D. logistics III enters comprehensive purifying tower, molecular sieve adsorbent A is contained in the comprehensive purifying tower, while removing
Aromatic hydrocarbons in coal gas and sulfide form logistics IV, and benzene concentration is less than 100mg/m wherein in logistics IV3, naphthalene concentration is less than 4
mg/m3Between, concentration of hydrogen sulfide is less than 4mg/m3；
E. after logistics IV enters compressor compresses, it is sent to gas turbine combustion power generation, the tail gas after gas turbine combustion is formed
Logistics V, wherein a concentration of of sulfur dioxide is less than 50mg/m in logistics V3；
F. logistics V enters tail gas desulfurization, denitration unit, and after scrubbing CO_2 and nitride, tail gas forms logistics VI, puts
It is empty, wherein a concentration of of sulfur dioxide is less than 10mg/m in logistics VI3, the adsorbent of molecular sieve B of tail gas desulfurization use.
In above-mentioned technical proposal, preferred technical solution is that the thick de- benzene unit uses solvent-extracted method, is taken off
Except the benzene of part in coal gas, thick desulfurization unit removes the hydrogen sulfide of part in coal gas using limestone desulfurizer.
In above-mentioned technical proposal, preferred technical solution is that the molecular sieve adsorbent is the absorption of hydrophobic type molecular sieve
Agent.
In above-mentioned technical proposal, preferred technical solution is to be filled in molecular sieve or activated carbon in moisture separator
It is at least one.
In above-mentioned technical proposal, preferred technical solution is to contain in the adsorbent of molecular sieve A and adsorbent of molecular sieve B
There are 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.
In above-mentioned technical proposal, preferred technical solution is that the IIth element A is selected from magnesium and calcium in the periodic table of elements
At least one of；Ith B races element is selected from least one of copper, silver；IIIth B races element in lanthanum, cerium, yttrium at least
It is a kind of.
In above-mentioned technical proposal, preferred technical solution is the molecular sieve adsorbent A and molecular sieve adsorbent B
Middle molecular sieve is selected from X-type molecular sieve, Y type molecular sieve, A type molecular sieve, ZSM types molecular sieve, modenite, beta molecular sieve, SAPO
Type molecular sieve, MCM-22, MCM-49, MCM-56, ZSM-5/ modenite, ZSM-5/ β zeolites, ZSM-5/Y, MCM-22/ mercerising
Zeolite, ZSM-5/Magadiite, ZSM-5/ β zeolites/modenite, ZSM-5/ β zeolites/Y zeolites or ZSM-5/Y zeolites/mercerising
At least one of zeolite.
In above-mentioned technical proposal, preferred technical solution is that ZSM type molecular sieves include in the molecular sieve adsorbent A
At least one of ZSM-5, ZSM-23, ZSM-11, ZSM-48.
In above-mentioned technical proposal, preferred technical solution is the molecular sieve adsorbent while removing the coke in coal gas
Oil, 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 that the molecular sieve adsorbent is regenerable sorbent；Institute
The adsorbent of molecular sieve A and adsorbent of molecular sieve B stated is continuing with after being regenerated 3 ~ 60 hours at 100 ~ 600 DEG C.
It is known in the art, during gas purification process, coal gas is purified using traditional handicraft, using desulfurizing tower again
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
Absorbing unit purifies coal gas successively.In device operation, device exit hydrogen sulfide, benzene and naphthalene are dense, compressor cooling tube
Road 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）Using adsorbent of molecular sieve, can by benzene, naphthalene and hydrogen sulfide,
Organic sulfur can be removed thoroughly totally, solve the problems, such as line clogging.（2）Adsorbent is subjected to multifunction, can simultaneously desulfurization,
De- benzene, de- naphthalene can be carried out at the same time comprehensive purifying process, reduce the quantity of adsorption tower in this way, reduce in an adsorption tower
Production cost.
Technical solution using the present invention：The coke-stove gas that coke oven comes out enters slightly de- benzene unit, slightly enters after de- benzene
Dewatering unit, dewatered coal gas enter comprehensive purifying tower, molecular sieve adsorbent are contained in purifying column, while removing coal gas
In aromatic hydrocarbons and sulfide, after entering back into compressor compresses, be sent to gas turbine power generation.Taking off naphthalene tower exit hydrogen sulfide content is
0 mg/m3, naphthalene content is 0 mg/m3, tar content 0, the organic sulfur carried in gas is also removed, dioxy in combustion engine flue gas
Change sulphur emissions in 10m hereinafter, device is stable, achieves 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 for coke oven coke-stove gas, 2 be logistics I, i.e. the slightly coke-stove gas after de- benzene, and 3 be logistics II；4
It is logistics IV for logistics III, 5,6 be compressed coal gas, and 7 be logistics V, and 8 be logistics VI；
In Fig. 1, I is de- crude benzol tower, and II is thick desulfurizing tower, and III is moisture separator, and IV is comprehensive purifying tower, and V is gas compression
Machine, VI is fuel engine power generation machine, and VII is tail gas desulfurization denitration unit.
The present invention will be further described below by way of examples, but is not limited only to the present embodiment.
Specific implementation mode
【Embodiment 1】
As shown in Fig. 1, the electricity-generating method of coke-stove gas, includes the following steps：A. the coke-stove gas that coke oven comes out enters thick
De- benzene unit slightly forms logistics I after de- benzene, and benzene concentration is in 2000mg/m wherein in logistics I3Between, naphthalene concentration is in 1300mg/m3
Between；B. logistics I enters thick desulfurization unit, logistics II is formed after thick desulfurization, wherein concentration of hydrogen sulfide exists in logistics II
300mg/m3Between；C. logistics II enters moisture separator, after removing the operative liquid moisture in coke-stove gas, forms logistics
Ⅲ；D. logistics III enters comprehensive purifying tower, and the interior adsorbent containing ZSM-5 molecular sieve of the comprehensive purifying tower removes simultaneously
Fall the aromatic hydrocarbons and sulfide in coal gas, form logistics IV, benzene concentration is less than 100mg/m wherein in logistics IV3, naphthalene concentration is less than 4
mg/m3Between, concentration of hydrogen sulfide is less than 4mg/m3；E. after logistics IV enters compressor compresses, it is sent to gas turbine combustion power generation,
Tail gas after gas turbine combustion forms logistics V, wherein a concentration of of sulfur dioxide is less than 50mg/m in logistics V3；f.
Logistics V enters tail gas desulfurization, denitration unit, and after scrubbing CO_2 and nitride, tail gas forms logistics VI, emptying, wherein
The a concentration of of sulfur dioxide is less than 10mg/m in logistics VI3, the Y molecular sieve adsorbent of tail gas desulfurization use.Device continuous operation 3
A month or more, comprehensive purifying tower exit benzene, naphthalene, concentration of hydrogen sulfide were stablized, and gas compression pump does not occur plugging phenomenon, combustion engine yet
Exhaust emissions in sulfur dioxide concentration be less than 5mg/m3。
【Embodiment 2】
The electricity-generating method of coke-stove gas, includes the following steps：A. the coke-stove gas that coke oven comes out enters slightly de- benzene unit, slightly
Logistics I is formed after de- benzene, benzene concentration is in 1000mg/m wherein in logistics I3Between, naphthalene concentration is in 800mg/m3Between；B. logistics I
Into thick desulfurization unit, logistics II is formed after thick desulfurization, wherein concentration of hydrogen sulfide is in 200mg/m in logistics II3Between；C. object
Stream II enters moisture separator, after removing the operative liquid moisture in coke-stove gas, forms logistics III；D. logistics III enters comprehensive
Purifying column, the adsorbent for the ZSM-5 molecular sieve being modified containing copper in the comprehensive purifying tower are closed, while removing in coal gas
Aromatic hydrocarbons and sulfide form logistics IV, and benzene concentration is less than 100mg/m wherein in logistics IV3, naphthalene concentration is less than 4 mg/m3Between,
Concentration of hydrogen sulfide is less than 4mg/m3；E. after logistics IV enters compressor compresses, gas turbine combustion power generation, gas turbine are sent to
Tail gas after burning forms logistics V, wherein a concentration of of sulfur dioxide is less than 50mg/m in logistics V3；F. logistics V into
Enter tail gas desulfurization, denitration unit, after scrubbing CO_2 and nitride, tail gas forms logistics VI, emptying, wherein in logistics VI
The a concentration of of sulfur dioxide is less than 10mg/m3, the rare earth modified Y molecular sieve adsorbent of tail gas desulfurization use.Device is continuously transported
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 phenomenon yet,
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 slightly de- benzene unit, slightly forms logistics I after de- benzene, wherein benzene concentration exists in logistics I
3000mg/m3Between, naphthalene concentration is in 400mg/m3Between；Logistics I enters thick desulfurization unit, and logistics II is formed after thick desulfurization, wherein
II concentration of hydrogen sulfide of logistics is in 400mg/m3Between；Logistics II enters moisture separator, removes the operative liquid in coke-stove gas
After moisture, logistics III is formed；Logistics III enters comprehensive purifying tower, contains copper and zinc modification ZSM-5 in the comprehensive purifying tower
Molecular sieve adsorbent, while removing aromatic hydrocarbons and sulfide in coal gas, form logistics IV, wherein benzene concentration in logistics IV
Less than 100mg/m3, naphthalene concentration is less than 4 mg/m3Between, concentration of hydrogen sulfide is less than 4mg/m3；Logistics IV enters compressor compresses
Afterwards, it is sent to gas turbine combustion power generation, the tail gas after gas turbine combustion forms logistics V；The entrance of logistics V tail gas desulfurization,
After denitration unit, scrubbing CO_2 and nitride, tail gas forms logistics VI and is vented, the rare earth that the tungsten that tail gas desulfurization uses is modified
Y molecular sieve adsorbent.
The aromatic hydrocarbons and sulfide in coal gas, toluene, dimethylbenzene, ethylbenzene, three are fallen in removing simultaneously in above-mentioned comprehensive purifying tower
Concentration in toluene, naphthalene, anthracene, Kun is less than 1 mg/m3Between；Hydrogen sulfide, sulfur dioxide, mercaptan, thioether, thiophene, methyl mercaptan,
Concentration in Dimethyl sulfide is less than 1 mg/m3Between.
Device continuous operation 3 months or more, 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 5mg/m in the exhaust emissions of combustion engine yet3。
【Embodiment 4】
According to the purification method of embodiment 1, the Y molecular sieve class adsorbent being modified containing copper is contained in the comprehensive purifying tower,
The aromatic hydrocarbons and sulfide in coal gas are fallen in removing simultaneously, and benzene concentration is less than 50mg/m in logistics herein3, naphthalene concentration is less than 2mg/m3It
Between, concentration of hydrogen sulfide is less than 2mg/m3；After purified coal gas enters compressor compresses, it is sent to gas turbine power generation, combustion gas wheel
Tail gas after machine burning enters tail gas desulfurization, denitration unit, after scrubbing CO_2 and nitride, tail gas emptying, and tail gas desulfurization
The copper of use and the rare-earth Y molecular sieve adsorbent of zinc modification.Device continuous operation 3 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 5】
According to the purification method of embodiment 1, wherein benzene concentration is less than 100mg/m in logistics IV3, naphthalene concentration is less than 4 mg/m3
Between, concentration of hydrogen sulfide is less than 4mg/m3；After logistics IV enters compressor compresses, it is sent to gas turbine combustion power generation, combustion gas wheel
Tail gas after machine burning, forms logistics V；Logistics V enters tail gas desulfurization, denitration unit, scrubbing CO_2 and nitride
Afterwards, tail gas forms logistics VI and is vented, the rare-earth Y molecular sieve adsorbent that the vanadium and tungsten that tail gas desulfurization uses are modified.
ZSM-5 molecular sieve class adsorbent containing zinc modification in above-mentioned comprehensive purifying tower, molecular sieve silica alumina ratio are
600, while removing aromatic hydrocarbons and sulfide in coal gas, the concentration in toluene, dimethylbenzene, ethylbenzene, trimethylbenzene, naphthalene, anthracene, Kun is small
In 1 mg/m3Between；Concentration in hydrogen sulfide, sulfur dioxide, mercaptan, thioether, thiophene, methyl mercaptan, Dimethyl sulfide is less than 1
mg/m3Between.Device continuous operation 3 months or more, comprehensive purifying tower exit benzene, naphthalene, concentration of hydrogen sulfide are stablized, gas compression
Machine does not occur plugging phenomenon yet, and 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 forms logistics I after de- benzene, wherein benzene concentration exists in logistics I
1000~3500mg/m3Between, naphthalene concentration is in 200~500mg/m3Between, concentration of hydrogen sulfide is in 100~500mg/m3Between；Object
Stream I enters comprehensive purifying tower, the Y molecular sieve of the ZSM-5 molecular sieve and zinc modification that are modified containing copper in the comprehensive purifying tower
Class adsorbent, while removing aromatic hydrocarbons and sulfide in coal gas, logistics II is formed, 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, 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 5mg/m in the exhaust emissions of combustion engine3。
【Embodiment 7】
The coke-stove gas that coke oven comes out enters slightly de- benzene unit, subsequently into thick desulfurization unit, slightly logistics after the thick desulfurization of de- benzene
Middle benzene concentration is in 1000~3000mg/m3Between, naphthalene concentration is in 200~400mg/m3Between, concentration of hydrogen sulfide 100~
400mg/m3Between；Logistics enters moisture separator, after removing the operative liquid moisture in coke-stove gas, into comprehensive purifying
Tower, the Y molecular sieve class adsorbent of the interior ZSM-5 molecular sieve and zinc modification being modified containing copper of the comprehensive purifying tower, wherein
The silica alumina ratio of the silica alumina ratio 400 of ZSM-5 molecular sieve, Y molecular sieve is more than 100.Adsorbent removes in coal gas simultaneously
Aromatic hydrocarbons and sulfide, herein in logistics benzene concentration be less than 50mg/m3, naphthalene concentration is less than 2mg/m3Between, concentration of hydrogen sulfide is less than
2mg/m3；After purified coal gas enters compressor compresses, it is sent to gas turbine power generation, the tail gas after gas turbine combustion enters
Tail gas desulfurization, denitration unit, after scrubbing CO_2 and nitride, tail gas emptying.Device continuous operation 3 months or more, it is comprehensive
Purifying column exit benzene, naphthalene, concentration of hydrogen sulfide are stablized, and gas compression pump does not occur plugging phenomenon yet, in the exhaust emissions of combustion engine
Sulfur dioxide concentration is less than 5mg/m3。
【Embodiment 8】
The coke-stove gas that coke oven comes out enters slightly de- benzene unit, and logistics I is slightly formed after de- benzene, and the thick de- benzene unit uses
The method of methanol solvate extraction, removes the benzene of part in coal gas, benzene concentration is in 1000~4000mg/m wherein in logistics I3Between,
Naphthalene concentration is in 200~500mg/m3Between；Logistics I enters thick desulfurization unit, and thick desulfurization unit is removed using limestone desulfurizer
The hydrogen sulfide of part in coal gas forms logistics II after thick desulfurization, wherein II concentration of hydrogen sulfide of logistics is in 100~500mg/m3It
Between；Logistics II enters moisture separator, after removing the operative liquid moisture in coke-stove gas, forms logistics III；Logistics III enters
Comprehensive purifying tower contains ZSM-5 molecular sieve class adsorbent in the comprehensive purifying tower, at the same remove the aromatic hydrocarbons in coal gas and
Sulfide forms logistics IV, wherein benzene concentration is less than 100mg/m in logistics IV3, naphthalene concentration is less than 4 mg/m3Between, hydrogen sulfide
Concentration is less than 4mg/m3；After logistics IV enters compressor compresses, it is sent to gas turbine combustion power generation, the tail after gas turbine combustion
Gas forms logistics V；Logistics V enters tail gas desulfurization, denitration unit, after scrubbing CO_2 and nitride, tail gas formation
VI emptying of stream.
In above-mentioned comprehensive purifying tower and tail gas desulfurization unit uses the ZSM-5 molecular sieve class adsorbent containing zinc modification,
Molecular sieve silica alumina ratio be 600, while remove fall coal gas in aromatic hydrocarbons and sulfide, toluene, dimethylbenzene, ethylbenzene, trimethylbenzene,
Concentration in naphthalene, anthracene, Kun is less than 1 mg/m3Between；Hydrogen sulfide, sulfur dioxide, mercaptan, thioether, thiophene, methyl mercaptan, methyl
Concentration in thioether is less than 1 mg/m3Between.Device continuous operation 3 months or more, comprehensive purifying tower exit benzene, naphthalene, vulcanization
Hydrogen concentration is stablized, and gas compression pump does not occur plugging phenomenon yet, and 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, subsequently into thick desulfurization unit, slightly logistics after the thick desulfurization of de- benzene
Middle benzene concentration is in 1000~3000mg/m3Between, naphthalene concentration is in 200~400mg/m3Between, concentration of hydrogen sulfide 100~
400mg/m3Between；Logistics enters moisture separator, after removing the operative liquid moisture in coke-stove gas, into comprehensive purifying
Tower, the Y molecular sieve class adsorbent of the interior ZSM-5 molecular sieve and zinc modification being modified containing copper of the comprehensive purifying tower, wherein
The silica alumina ratio of the silica alumina ratio 400 of ZSM-5 molecular sieve, Y molecular sieve is more than 100.Adsorbent removes in coal gas simultaneously
Aromatic hydrocarbons and sulfide, herein in logistics benzene concentration be less than 50mg/m3, naphthalene concentration is less than 2mg/m3Between, concentration of hydrogen sulfide is less than
2mg/m3；After purified coal gas enters compressor compresses, it is sent to gas turbine power generation, the tail gas after gas turbine combustion enters
Tail gas desulfurization, denitration unit, after scrubbing CO_2 and nitride, tail gas emptying, above-mentioned tail gas desulfurization unit is changed using copper
The Y molecular sieve class adsorbent of the ZSM-5 molecular sieve and zinc modification of property.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。
It after adsorbent in comprehensive adsorption tower adsorbs a week, is regenerated at 170 DEG C using purified coal gas, regeneration 12 is small
Shi Hou, cold blowing to room temperature, is continuing with, and the absorption property of adsorbent is stablized, and benzene concentration is less than 50mg/m in logistics II3, naphthalene is dense
Degree is less than 2mg/m3Between, concentration of hydrogen sulfide is less than 2mg/m3。
【Comparative example 1】
According to method described in embodiment 1, acticarbon is only used, after running 10 hours, the sampling point of logistics II
Analysis, benzene concentration is in 2000mg/m3, naphthalene concentration is in 200mg/m3, concentration of hydrogen sulfide is in 300mg/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 electricity-generating method of coke-stove gas, includes the following steps：
A. the coke-stove gas that coke oven comes out enters slightly de- benzene unit, slightly forms logistics I, wherein benzene concentration in logistics I after de- benzene
In 1000~4000mg/m3Between, naphthalene concentration is in 100~500mg/m3Between；
B. logistics I enters thick desulfurization unit, and logistics II is formed after thick desulfurization, wherein in logistics II concentration of hydrogen sulfide 100~
500mg/m3Between；
C. logistics II enters moisture separator, after removing the operative liquid moisture in coke-stove gas, forms logistics III；
D. logistics III enters comprehensive purifying tower, molecular sieve adsorbent A is contained in the comprehensive purifying tower, while removing
Aromatic hydrocarbons in coal gas and sulfide form logistics IV, and benzene concentration is less than 100mg/m wherein in logistics IV3, naphthalene concentration is less than 4
mg/m3Between, concentration of hydrogen sulfide is less than 4mg/m3；
E. after logistics IV enters compressor compresses, it is sent to gas turbine combustion power generation, the tail gas after gas turbine combustion is formed
Logistics V, wherein a concentration of of sulfur dioxide is less than 50mg/m in logistics V3；
F. logistics V enters tail gas desulfurization, denitration unit, and after scrubbing CO_2 and nitride, tail gas forms logistics VI, puts
It is empty, wherein a concentration of of sulfur dioxide is less than 10mg/m in logistics VI3, the adsorbent of molecular sieve B of tail gas desulfurization use.
2. the electricity-generating method of coke-stove gas according to claim 1, it is characterised in that the thick de- benzene unit is using molten
The method of agent extraction removes the benzene in coal gas, and solvent is selected from organic amine, and either the thick desulfurization unit of alcohols uses lime stone or has
Machine amine.
3. the electricity-generating method of coke-stove gas according to claim 1, it is characterised in that be filled with molecule in moisture separator
At least one of sieve or activated carbon.
4. the electricity-generating method of coke-stove gas according to claim 1, it is characterised in that the molecular sieve adsorbent A is
Hydrophobic type adsorbent of molecular sieve；In the adsorbent of molecular sieve A and adsorbent of molecular sieve B containing the Ith A in the periodic table of elements,
At least one of 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.
5. the electricity-generating method of coke-stove gas according to claim 4, it is characterised in that the IIth A in the periodic table of elements
Element is 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,
At least one of cerium, yttrium.
6. the electricity-generating method of coke-stove gas according to claim 1, it is characterised in that the molecular sieve adsorbent A and
In adsorbent of molecular sieve B, molecular sieve be selected from X-type molecular 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/ modenites, ZSM-5/Magadiite, ZSM-5/ β zeolites/modenite, ZSM-5/ β zeolites/Y zeolites or
At least one of ZSM-5/Y zeolites/modenite.
7. the electricity-generating method of coke-stove gas according to claim 1, it is characterised in that the adsorbent of molecular sieve A and point
In sub- sieve adsorbant B, ZSM type molecular sieves include at least one of ZSM-5, ZSM-23, ZSM-11, ZSM-48, wherein described
The silica alumina ratio of molecular sieve is more than 100.
8. the electricity-generating method of coke-stove gas according to claim 1, it is characterised in that the molecular sieve adsorbent is same
When removing coal gas in tar, cyanide, ammonia.
9. the electricity-generating method of coke-stove gas according to claim 1, it is characterised in that the aromatic hydrocarbons is benzene, toluene, two
At least one of toluene, ethylbenzene, trimethylbenzene, naphthalene, anthracene, Kun；Sulfide be hydrogen sulfide, sulfur dioxide, mercaptan, thioether, thiophene,
At least one of methyl mercaptan, Dimethyl sulfide.
10. the electricity-generating method of coke-stove gas according to claim 1, it is characterised in that the adsorbent of molecular sieve A and
Adsorbent of molecular sieve B is regenerable sorbent, is continuing with after being regenerated 3 ~ 60 hours at 100 ~ 600 DEG C.
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