CN102134519B - Combined process for natural gas desulfurization with high resource utilization ratio and good environmental protection effect - Google Patents
Combined process for natural gas desulfurization with high resource utilization ratio and good environmental protection effect Download PDFInfo
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 120
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 62
- 230000023556 desulfurization Effects 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 43
- 239000003345 natural gas Substances 0.000 title claims abstract description 43
- 230000000694 effects Effects 0.000 title claims abstract description 5
- 230000007613 environmental effect Effects 0.000 title abstract 3
- 239000007789 gas Substances 0.000 claims abstract description 47
- 238000010521 absorption reaction Methods 0.000 claims abstract description 8
- 239000002808 molecular sieve Substances 0.000 claims abstract description 7
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000001179 sorption measurement Methods 0.000 claims abstract description 7
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 41
- 238000005516 engineering process Methods 0.000 claims description 30
- 230000003009 desulfurizing effect Effects 0.000 claims description 28
- 229910052717 sulfur Inorganic materials 0.000 claims description 22
- 239000011593 sulfur Substances 0.000 claims description 21
- 239000005864 Sulphur Substances 0.000 claims description 17
- 239000003054 catalyst Substances 0.000 claims description 16
- 239000003795 chemical substances by application Substances 0.000 claims description 14
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical class S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims description 12
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 claims description 11
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 5
- MPMSMUBQXQALQI-UHFFFAOYSA-N cobalt phthalocyanine Chemical compound [Co+2].C12=CC=CC=C2C(N=C2[N-]C(C3=CC=CC=C32)=N2)=NC1=NC([C]1C=CC=CC1=1)=NC=1N=C1[C]3C=CC=CC3=C2[N-]1 MPMSMUBQXQALQI-UHFFFAOYSA-N 0.000 claims description 3
- 230000007062 hydrolysis Effects 0.000 claims description 3
- 238000006460 hydrolysis reaction Methods 0.000 claims description 3
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 3
- 239000000725 suspension Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 4
- 238000000746 purification Methods 0.000 abstract description 3
- 238000011084 recovery Methods 0.000 abstract description 3
- 239000002994 raw material Substances 0.000 abstract description 2
- 235000001508 sulfur Nutrition 0.000 abstract 2
- 230000009466 transformation Effects 0.000 abstract 1
- 230000003197 catalytic effect Effects 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 239000001257 hydrogen Substances 0.000 description 5
- 229910052739 hydrogen Inorganic materials 0.000 description 5
- 125000001741 organic sulfur group Chemical group 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000008929 regeneration Effects 0.000 description 4
- 238000011069 regeneration method Methods 0.000 description 4
- WHDPTDWLEKQKKX-UHFFFAOYSA-N cobalt molybdenum Chemical compound [Co].[Co].[Mo] WHDPTDWLEKQKKX-UHFFFAOYSA-N 0.000 description 3
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 3
- 238000005984 hydrogenation reaction Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000005083 Zinc sulfide Substances 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920001021 polysulfide Polymers 0.000 description 2
- 239000005077 polysulfide Substances 0.000 description 2
- 150000008117 polysulfides Polymers 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- 241000282326 Felis catus Species 0.000 description 1
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 238000006356 dehydrogenation reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000007701 flash-distillation Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 239000003317 industrial substance Substances 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000002343 natural gas well Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000001706 oxygenating effect Effects 0.000 description 1
- 238000006213 oxygenation reaction Methods 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 230000001007 puffing effect Effects 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 150000003463 sulfur Chemical class 0.000 description 1
- 150000003464 sulfur compounds Chemical class 0.000 description 1
- -1 sulphur compound Chemical class 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Industrial Gases (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention relates to a combined process for natural gas desulfurization with a high resource utilization ratio and a good environmental protection effect; natural gas is used as a raw material, and the process comprises the following steps: allowing the natural gas to entering a crude desulfurization unit which adopts a NHD physical absorption method for desulfurization so as to remove most sulfurs, then allowing the natural gas to entering a fine desulfurization unit for further desulfurization so as to allow the natural gas to meet the product requirements of downstream devices, allowing the tail gas of desulfurization in the crude desulfurization unit to enter firstly a COS transformation unit and a wet desulfurization unit so as to allow H2S to be transformed into elemental sulfurs for recovery, allowing the tail gas in the wet desulfurization unit to enter the fine desulfurization unit and then to enter a molecular sieve adsorption unit after desulfurization, recovering the methane gas in the tail gas, and removing CO2. Compared with the prior art, the invention has the advantages of high purification degree, obvious environmental protection effect, high resource utilization ratio, relatively low investment for device construction, low operation cost, etc.
Description
Technical field
The present invention relates to a kind of selexol process group technology, especially relate to the good selexol process group technology of a kind of resource utilization height and environment protecting.
Background technology
Commercial natural gas generally is meant the natural gas that comes out from the natural gas well through after the preliminary desulfurization, total sulfur (comprising organic sulfur, inorganic sulfur)≤200mg/m
3A kind of gas as commodity selling; commercial natural gas also will further remove sulphur according to the production requirement before being converted into chemical products usually; dry desulfurizing process is generally adopted in existing commercial natural gas desulfurization; as cobalt molybdenum hydrogenation catalyst sulfur removal technology, and dry method catalytic desulfurization technologies of coming out in the recent period newly developed.
Tradition cobalt molybdenum hydrogenation catalyst desulfurization process is roughly as follows: commercial natural gas is heated to about 380 ℃, mix with hydrogen, enter into cobalt molybdenum hydrogenation catalyst reactor then, with the sulphur compound hydro-conversions such as organic sulfur in the commercial natural gas is hydrogen sulfide, then enter into the desulfurizer that zinc oxide is housed, make hydrogen sulfide and zinc oxide reaction in the natural gas generate zinc sulphide, to reach the purpose of removing sulphur, the natural gas that removes sulphur by the heat exchanger cooling after, gas is desulfurization finished product gas, if do not allow to contain hydrogen system, then enter dehydrogenation unit, remove hydrogen.
The technological process of typical case's dry method catalytic oxidation desulfurization is roughly as follows: considering the moisture deficit of natural gas, is again anaerobic state, so give moisturizing, oxygenation earlier.Will be after the oxygenating of commercial natural gas humidification by gas-liquid separator, be heated to 45～65 ℃ of temperature that desulfurizing agent needs again after, enter desulphurization system.Desulfurizing tower can adopt parallel connection or string and form, and natural gas enters in each desulfurizing tower, and each desulfurizing tower is equipped with catalytic desulfurizing agent, through behind the desulfurizing tower, makes the sulfur content in the natural gas reduce to the regulation requirement.The natural gas via filter is removed the micro-dust that natural gas is carried secretly, gives downstream unit and uses, and all the other tail gas feed torch burning.This dry desulfurization process is a catalytic oxidation process, and oxygen is the essential reactant of this sulfur removal technology, and desulfurization product is elemental sulfur and higher boiling polysulfide.Therefore when using catalytic desulfurizing agent, must replenish a spot of oxygen (oxygen or air).Process flow diagram is seen Fig. 1.
Summary of the invention
Purpose of the present invention is exactly that a kind of degree of purification height, utilization rate height, resource utilization height and the good selexol process group technology of environment protecting that operating cost is low are provided in order to overcome the defective that above-mentioned prior art exists.
Purpose of the present invention can be achieved through the following technical solutions:
The selexol process group technology that a kind of resource utilization height and environment protecting are good is characterized in that, this technology may further comprise the steps:
(1) main sulfur removal technology: commercial natural gas enters thick desulfurization unit, and sulfide in the natural gas is by the NHD desulfurizing agent adsorbing and removing in the thick desulfurization unit, and the gas after removing enters smart desulfurization unit, through the COS hydrolysis, take off H
2After S and the removal of mercaptans step, obtain removing the finished product natural gas of sulfide;
(2) vent gas treatment of thick desulfurization unit: the tail gas that produces in the thick desulfurization unit enters the COS conversion unit, and the control temperature is 50 ℃～90 ℃, and COS is converted into H
2S, the H of generation
2S enters the wet desulphurization unit, and the effect by desulphurization catalyst is with H
2S is transformed into the elemental sulfur of suspension;
(3) vent gas treatment of wet desulphurization unit: the tail gas that produces in the wet desulphurization unit is through boosting to 1.5MPa～3.0MPa, enters the molecular sieve adsorption unit again after entering smart desulfurization unit desulfurization, and the methane gas that absorption obtains enters the finished product natural gas, the CO that removes
2Emptying.
Sulfide in the described step (1) in the natural gas comprises H
2S, COS, RSH and RSR.
NHD desulfurizing agent in the described step (1) is a NHD.
Desulphurization catalyst in the described step (2) is a high-molecular complex, based on the 888 commercially available desulfurizing agents of three nuclear phthalocyanine cobalt sulfonate metallo-organic compounds.
The tail gas that produces in the wet desulphurization unit in the described step (3) comprises methane, CO
2And a small amount of sulphur component.
Described a small amount of sulphur component comprises H
2S, COS, RSH and RSR.
Smart desulfurization unit is identical with smart desulfurization unit in the step (1) in the described step (3).
Compared with prior art, the present invention has the following advantages:
(1) degree of purification height, environment protecting are obvious: in this process program owing to adopted technology such as NHD Physical Absorption desulfur technology, COS technology for hydrolyzing, smart desulfurization and molecular sieve adsorption respectively, make the content of desulfurization purifying degree height, particularly organic sulfur of natural gas further reduce.The tail gas that is rich in sulfide that produces in thick sulfur removal technology is through handling, the recyclable byproduct sulphur that obtains, make the discharge capacity of solid waste (particularly dead catalyst) greatly reduce, and traditional handicraft produces a large amount of zinc sulphide or sulfur-bearing and polysulfide solid waste, and environment protecting of the present invention is fairly obvious;
(2) resource utilization height: technological process of the present invention, make the sulfide of the interior overwhelming majority of commercial natural gas change into elemental sulfur, can be used as industrial chemicals is used, traditional handicraft then all is transformed into sulphur all in the commercial natural gas sulfur-containing solid refuse discharges, and also needs to consume a large amount of catalyst simultaneously.It is main that technology main flow of the present invention adopts the Physical Absorption method, make the sulfide of the interior overwhelming majority of commercial natural gas be absorbed by NHD earlier, and have only the fraction commercial natural gas by catalyst layer, so the catalyst consumption amount is few.Traditional handicraft is then passed through catalyst layer with the entire service natural gas, so the catalyst consumption amount is very big.The wet desulphurization tail gas treatment process that technology of the present invention adopted has carried out abundant recovery to the methane gas in the tail gas, makes it to turn back to again in the main methane gas stream, and the methane of whole desulfurizer loses less than 0.1%, makes resource be able to sufficient utilization;
(3) Zhuan Zhi construction investment is relatively low, and the present invention is used for domestic a certain commercial natural gas desulfurizing item, about 1.1 hundred million yuans of its total investment for construction, and the dry desulfurizing process of common catalytic desulfurizing agent, about 1.4 hundred million yuans of its total investment for construction;
(4) operating cost is low, and the operating cost of sulfur removal technology of the present invention is starkly lower than the cost of dry desulfurizing process.
Description of drawings
Fig. 1 is a dry method catalytic oxidation desulfurization technology general flow chart in parallel;
Fig. 2 is a process chart of the present invention.
The specific embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
Embodiment
Domestic a certain commercial natural gas desulfurizing item
Scale: handle natural gas tolerance 215000Nm
3/ hr
Natural gas composition and temperature, pressure see Table 1.
Table 1
| Composition | Unit | Specification |
| Methane | Vol.％ | 97.06 |
| Ethane | Vol.％ | 0.15 |
| Propane | Vol.％ | 0.01 |
| N 2 | Vol.％ | 0.71 |
| O 2 | Vol.％ | -- |
| Helium | Vol.％ | 0.01 |
| Hydrogen | Vol.％ | 0.03 |
| CO 2 | Vol.％ | 2.03 |
| COS | mg S/Nm 3 | |
| Organic sulfur | mg S/Nm 3 |
| Sulfur-bearing composition (in S) | mg S/Nm 3 | Total sulfur≤200mg/Nm 3Wherein: H 2S≤20mg/Nm 3COS 〉=70% organic sulfur (RSH, R-S-R)≤20% |
| H 2O | Vol.％ | 0.004 |
| Mechanical admixture size＜50 μ m | mg/Nm 3 | |
| Low heat value | MJ/Nm 3(dry) | |
| Pressure | MPa(g) | 3.6～4 |
| Temperature | ℃ | -4.5～13℃ |
Technological parameter and desulfurization requirement
(1) total sulfur (in S) :≤0.3mg/Nm
3
(2) must not use copper product in the sweetening process;
(3) sweetening process does not add hydrogen;
(4) year operating time: 8000h;
(5) pressure after the desulfurization is 0.7～0.9MPa (g);
(6) temperature is 40 ℃.
The selexol process group technology that a kind of resource utilization height and environment protecting are good, process diagram as shown in Figure 2, this technology may further comprise the steps:
(1) main desulfurization process
Raw natural gas (215000Nm
3/ hr) entering thick, smart desulfurization unit, the sulfide in the natural gas comprises H
2S, COS, RSH and RSR.Wet method NHD Physical Absorption sulfur removal technology is adopted in thick desulfurization, and the NHD desulfurizing agent is a NHD, NHD desulfurization lean solution counter current contacting on filler that raw natural gas and desulfurizing tower top enter, wherein most H
2S, COS, sulfide is by Physical Absorption, CO
2Gas is partially absorbed.Thick desulfurization can be with the total sulfur 200mg/Nm in the raw material
3Be removed to 8mg/Nm
3, the methane gas that goes out thick desulfurization unit enters the smart desulfurization unit of dry method, catalyst is housed (with r-AL in the smart desulfurization unit
2O
3Add Mo, Ti, Mn, Ni or/and the r-AL of the water soluble compound of any metal among K, Na, Ca, the Mg with mixed grind method or infusion process
2O
3, it is r-AL that the amount of metal of adding is converted into metal oxide
2O
30.001%～20% of quality, drying or the oven dry roasting make), desulfurizing agent (special typed active carbon), COS becomes H through the catalyst hydrolysis
2S removes H through desulfurizing agent again
2S and mercaptan are removed to remaining sulphur and satisfy total sulfur≤0.3mg/Nm
3Requirement, the methane gas methane gas with tail gas recycle after puffing recovers energy that goes out smart desulfurization unit enters downstream unit.The sulfur compound NHD rich solution of discharging at the bottom of thick desulfurization unit desulfurizing tower enters flash tank and carries out flash distillation after decompression, reclaim methane gas, enters regenerator after the rich solution heat exchange and carries out heat regeneration, enters desulfurizing tower after regenerated liquid pressurizes, cools off and carries out recycling.
(2) handling process of thick desulfidation tail gas
The rich sulphur tail gas and the about 6100Nm of flash steam of thick desulfurization unit
3/ hr enters the COS conversion unit through boosting, the control temperature is 50 ℃～90 ℃, makes COS be converted into H
2S then enters wet method and takes off H
2The S unit is rich in H
2The tail gas of S in desulfurizing tower with contain the alkali lye counter current contacting of desulfurizing agent, to remove the hydrogen sulfide in the tail gas, the desulphurization catalyst that is adopted is a high-molecular complex, promptly based on the 888 commercially available desulfurizing agents of three nuclear phthalocyanine cobalt sulfonate metallo-organic compounds, its specific molecule structure makes it have very strong ability to take oxygen, and the oxygen of absorption can be activated.Simultaneously can adsorb H
2S, HS
-, Sx
2-And be adsorbed the oxygen that has activated and carry out redox reaction and separate out sulphur; after the elemental sulfur that generates breaks away from desulfurizing agent; small sulfur granules combination adjacent to each other in solution; become suspension sulphur and enter the rich solution groove from the desulfurization rich solution that desulfurizing tower comes out; by being sent to jet regeneration tank regeneration after the pressurization of rich solution pump, the sulphur foam that floatingly selects advances people's sulphur foam tank and is sent to sulfur recovery system, obtains the solid sulfur byproduct through molten sulphur.The desulfurization lean solution that regeneration is good is sent to the desulfurization cat head and recycles, and the tail gas after wet desulphurization enters the wet desulphurization tail gas treating unit.
(3) wet desulphurization vent gas treatment flow process
The tail gas that produces in the wet desulphurization unit enters the smart desulfurization unit of tail gas through boosting to 1.5MPa～3.0MPa, and tail gas comprises methane, CO
2And small amount of H
2S, COS, RSH, RSR, flow process is identical with smart desulfurization unit in the main sulfur removal technology, but the scale difference, through further entering the molecular sieve adsorption unit after the desulfurization, adopts molecular sieve adsorption to reclaim wherein the about 5058Nm of methane gas
3/ h, the methane gas stream after the smart desulfurization of this methane gas in main desulfurization process enters downstream unit after mixing.Remove most of CO simultaneously in the molecular sieve adsorption unit
2Gas makes CO
2Emptying up to standard.
Claims (5)
1. resource utilization height and the good selexol process group technology of environment protecting is characterized in that this technology may further comprise the steps:
(1) main sulfur removal technology: commercial natural gas enters thick desulfurization unit, and sulfide in the natural gas is by the NHD adsorbing and removing in the thick desulfurization unit, and the gas after removing enters the first smart desulfurization unit, through the COS hydrolysis, take off H
2After S and the removal of mercaptans step, obtain removing the finished product natural gas of sulfide;
(2) vent gas treatment of thick desulfurization unit: the tail gas that produces in the thick desulfurization unit enters the COS conversion unit, and the control temperature is 50 ℃～90 ℃, and COS is converted into H
2S, the H of generation
2S enters the wet desulphurization unit, and the effect by desulphurization catalyst is with H
2S is transformed into the elemental sulfur of suspension;
(3) vent gas treatment of wet desulphurization unit: the tail gas that produces in the wet desulphurization unit is through boosting to 1.5MPa～3.0MPa, enter the molecular sieve adsorption unit again after entering the second smart desulfurization unit desulfurization, the methane gas that absorption obtains enters the finished product natural gas, the CO that removes
2Emptying;
Sulfide in the step (1) in the natural gas comprises H
2S, COS, RSH and RSR.
2. a kind of resource utilization height according to claim 1 and the good selexol process group technology of environment protecting, it is characterized in that, desulphurization catalyst in the described step (2) is a high-molecular complex, based on the 888 commercially available desulfurizing agents of three nuclear phthalocyanine cobalt sulfonate metallo-organic compounds.
3. a kind of resource utilization height according to claim 1 and the good selexol process group technology of environment protecting is characterized in that, the tail gas that produces in the wet desulphurization unit in the described step (3) comprises methane, CO
2And a small amount of sulphur component.
4. a kind of resource utilization height according to claim 3 and the good selexol process group technology of environment protecting is characterized in that described a small amount of sulphur component comprises H
2S, COS, RSH and RSR.
5. a kind of resource utilization height according to claim 1 and the good selexol process group technology of environment protecting is characterized in that, smart desulfurization unit is identical with smart desulfurization unit in the step (1) in the described step (3).
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| CN103013600A (en) * | 2012-11-19 | 2013-04-03 | 河南天冠工业沼气有限公司 | Biogas desulfurization method in series of wet method with dry method |
| CN103242923B (en) * | 2013-04-15 | 2014-07-09 | 利丰工程技术(天津)有限公司 | Natural gas desulfurization device and desulfurization process applicable to production platform |
| CN103446861A (en) * | 2013-09-13 | 2013-12-18 | 四川鸿鹄科技集团有限公司 | Circulating treatment method for regenerated waste gas produced in temperature swing adsorption desulfurization |
| CN104437032A (en) * | 2014-11-11 | 2015-03-25 | 浙江三龙催化剂有限公司 | Synthetic raw material gas deep fine desulfurization process and fine desulfurization device |
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| CN106190386B (en) * | 2016-08-26 | 2022-05-24 | 四川鸿鹄科技集团有限公司 | Method for deeply removing organic sulfur from natural gas |
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