Background
China contains sulfur (mainly H)2S) the natural gas yield of the gas field accounts for more than 60% of the whole country, and the sulfur recovered from the sulfur-containing natural gas accounts for about 30% of the sulfur yield of China. At present, the process for intensively treating domestic sulfur-containing natural gas is mature, and the design treatment scale is usually 100x104m3Over hundred million equipment investment, wet desulphurization by adopting MDEA, alcohol amine method, sulfone amine method and the like, and then recovering Claus sulfur; for single wells with developed construction, more villages and towns, densely developed population, highways and railways in the periphery, the problems of large occupied area, difficulty in removal and the like exist in site station building and processing, and certain hidden danger and difficulty exist in terms of safety, removal and the like if a centralized purification processing mode of a desulfurization plant is adopted; the sulfur content is not too low, but the method is not suitable for the working condition of Claus sulfur recovery, and the natural gas can not be desulfurized on site for use(ii) a In addition, the treatment of natural gas with very low sulphide content is mature, solid iron oxide processes can be used, and it is not yet possible to desulphurise natural gas on site for its use in some sites and their surroundings in remote areas; in addition, large-scale equipment cannot be built on site in deserts, gobi, oceans and the like, and the natural gas found cannot be desulfurized and recycled. Therefore, the gas well can not be developed for years, and the recovery of exploration and drilling cost is seriously influenced.
In order to overcome the disadvantages of the complaints and the disadvantages of the traditional natural gas desulfurization and purification process, the complex iron natural gas desulfurization technology directly converts sulfides in the natural gas into elemental sulfur while desulfurizing, thereby simplifying the process flow, facilitating the operation, reducing the investment and being suitable for in-situ desulfurization and purification of the natural gas at the well head. The oxidation regeneration and the sulfur concentration of the traditional complex iron desulfurization technology are carried out in one oxidation regeneration tank, and for the working condition with higher latent sulfur content, the size of the oxidation regeneration tank is very large and needs to be built on site, which brings great difficulty for remote places.
The utility model aims at the above technical problem, a remove convenient to assemble and pull down convenient carbon-containing hydrogen gas's low pressure sour gas complex iron desulfurization skid-mounted device is provided.
For realizing above-mentioned purpose, the utility model discloses a low pressure sour gas complex iron desulfurization skid-mounted device of hydrocarbon gas body includes sour gas pressure boost sledge in proper order, sour gas divides liquid sledge, absorb sledge, at least one regeneration sledge, sulphur subsides sledge, sulphur thick liquid filters sledge, melt sulphur sledge and circulating pump sledge, wherein, sour gas pressure boost sledge includes booster fan, sour gas divides liquid sledge to include first minute fluid reservoir, absorb sledge include the absorption tank and divide the fluid reservoir with the second that the absorption tank links to each other, regeneration sledge includes regeneration tank and the minute fluid reservoir that links to each other with the regeneration tank, sulphur subsides sledge includes the subsider, sulphur thick liquid filters sledge and includes the filter and the collecting vat that links to each other with the filter, melt sulphur sledge includes melt sulphur cauldron and the cooling collecting vat that links to each other with the melt sulphur cauldron.
Further, the desalting water skid also comprises a desalting water skid, and a desalting water outlet W0 of the desalting water skid is respectively connected with a first desalting water inlet W1 of the absorption tank, a desalting water inlet of the regeneration tank, a fifth desalting water inlet W5 of the settling tank and a sixth desalting water inlet W6 of the filter.
Further, the device also comprises a fan sledge, wherein an air outlet of the fan sledge is connected with an air inlet of the regeneration tank.
Further, the regeneration sledge comprises a first regeneration sledge, a second regeneration sledge and a third regeneration sledge which are sequentially connected in series, the first regeneration sledge comprises a first regeneration groove and a third liquid dividing tank connected with the first regeneration groove, the second regeneration sledge comprises a second regeneration groove and a fourth liquid dividing tank connected with the second regeneration groove, and the third regeneration sledge comprises a third regeneration groove and a fifth liquid dividing tank connected with the third regeneration groove.
Furthermore, a first outlet b of a booster fan in the acid gas pressure increasing sledge is connected with a second inlet c of a first liquid separating tank in the acid gas liquid separating sledge, a sewage outlet z of the first liquid separating tank is connected with an external sewage pool, and a second outlet d of the first liquid separating tank is connected with a third inlet e of an absorption tank of the absorption sledge; a desulfurization liquid inlet J of the absorption tank is connected with an external desulfurization liquid pipe, a tail gas outlet f of the second liquid separation tank is connected with the next process through a discharge pipeline, a third outlet k of the absorption tank is connected with an inlet of a regeneration tank in the regeneration sledge, a regenerated waste air outlet of the liquid separation tank is communicated with a waste air discharge pipeline, an outlet of the regeneration tank is connected with a seventh inlet r of a settling tank in the sulfur settling sledge, a desulfurization agent barren liquid outlet g of the settling tank is connected with a circulation inlet h of a circulation pump in the circulation pump sledge, a circulation outlet i of the circulation pump is connected with a desulfurization liquid inlet J of the absorption tank, a seventh outlet s of the settling tank is connected with an eighth inlet t of a filter in the sulfur slurry filtering sledge through a pump, an eighth outlet v of the collection tank is connected with a ninth inlet J of the settling tank through a pump, a ninth outlet u of the filter is connected with a tenth inlet w of a sulfur melting kettle in the sulfur sledge through a pump, and a tenth outlet y of the sulfur melting kettle is connected with the subsequent process, and an eleventh outlet x of the cooling collecting tank is connected with an eleventh inlet Q of the filter through a pump.
Furthermore, a first outlet b of a booster fan in the acid gas pressure increasing sledge is connected with a second inlet c of a first liquid separating tank in the acid gas liquid separating sledge, a sewage outlet z of the first liquid separating tank is connected with an external sewage pool, and a second outlet d of the first liquid separating tank is connected with a third inlet e of an absorption tank of the absorption sledge; a desulfurization liquid inlet j of the absorption tank is connected with an external desulfurization liquid pipe, a tail gas outlet F of the second liquid separation tank is connected with the next process through a discharge pipeline, a third outlet k of the absorption tank is connected with a fourth inlet l of a first regeneration tank in the first regeneration sledge, a regenerated waste air first outlet D of the third liquid separation tank is communicated with a waste air discharge pipeline, a fourth outlet m of the first regeneration tank is connected with a fifth inlet n of a second regeneration tank in the second regeneration sledge, a regenerated waste air second outlet F of the fourth liquid separation tank is communicated with a waste air discharge pipeline, a fifth outlet o of the second regeneration tank is communicated with a sixth inlet p of a third regeneration tank in the third regeneration sledge, a regenerated waste air third outlet H of the fifth liquid separation tank is communicated with a waste air discharge pipeline, a sixth outlet q of the third regeneration tank is connected with a seventh inlet r of a settling tank in the sulfur settling sledge, and a desulfurization agent outlet g of the settling tank is connected with a circulating pump H in the sledge, the circulating outlet i of the circulating pump is connected with the desulfurizing liquid inlet J of the absorption tank, the seventh outlet s of the settling tank is connected with the eighth inlet t of the filter in the sulfur slurry filtering sledge through a pump, the eighth outlet v of the collecting tank is connected with the ninth inlet J of the settling tank through a pump, the ninth outlet u of the filter is connected with the tenth inlet w of the sulfur melting kettle in the sulfur melting sledge through a pump, the tenth outlet y of the sulfur melting kettle is connected with the subsequent procedures, and the eleventh outlet x of the cooling collecting tank is connected with the eleventh inlet Q of the filter through a pump.
Compared with the prior art, the utility model has the advantages of it is following: the utility model discloses according to complex iron desulfurization process principle, adopt the modularized design in the technology, skid-mounted design and construction on the engineering can realize single well desulfurization recovery valuable natural gas resource on the spot in desert, Gobi and remote area oil gas field that are not suitable for the scene to be built, remove, dismantle, simple to operate.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific embodiments.
As shown in fig. 1, the skid-mounted device for desulfurization by low-pressure acid gas complex iron containing hydrocarbon gas sequentially comprises an acid gas pressurizing skid 1, an acid gas liquid separating skid 2, an absorbing skid 3, at least one regeneration skid, a sulfur settling skid 7, a sulfur slurry filtering skid 8, a sulfur melting skid 9 and a circulating pump skid 10, wherein in this embodiment, the regeneration skid comprises a first regeneration skid 4, a second regeneration skid 5 and a third regeneration skid 6 which are sequentially connected in series. Wherein, sour gas pressure boost sledge 1 includes booster fan 11, sour gas divides liquid sledge 2 to include first minute fluid reservoir 21, absorption sledge 3 includes the overhead tank 31 and the second minute fluid reservoir 32 that links to each other with overhead tank 31, first regeneration sledge 4 includes first regeneration tank 41 and the third minute fluid reservoir 42 that links to each other with first regeneration tank 41, second regeneration sledge 5 includes second regeneration tank 51 and the fourth minute fluid reservoir 52 that links to each other with second regeneration tank 51, third regeneration sledge 6 includes third regeneration tank 61 and the fifth minute fluid reservoir 62 that links to each other with third regeneration tank 61, sulphur settling sledge 7 includes settling tank 71, sulphur thick liquid filtering sledge 8 includes filter 81 and collecting vat 82 that links to each other with filter 81, sulphur melting sledge 9 includes sulphur melting kettle 91 and the cooling collecting vat 92 that links to each other with sulphur melting kettle 91. Meanwhile, a desalted water outlet W0 of the desalted water skid 12 is respectively connected with a first desalted water inlet W1 of the absorption tank 31, a second desalted water inlet W2 of the first regeneration tank 41, a third desalted water inlet W3 of the second regeneration tank 51, a fourth desalted water inlet W4 of the third regeneration tank 61, a fifth desalted water inlet W5 of the settling tank 71 and a sixth desalted water inlet W6 of the filter 81, and the desalted water skid 12 is used for replenishing water and flushing the absorption skid, the regeneration skid, the sulfur settling skid and the sulfur slurry filtering skid; an air outlet of the fan sledge 13 is respectively connected with a first air inlet B of the first regeneration tank, a second air inlet E of the second regeneration tank and a third air inlet G of the third regeneration tank, and the fan sledge 9 is used for blowing air to the regeneration sledge.
Wherein, a first outlet b of a booster fan 11 in the acid gas pressure increasing sledge 1 is connected with a second inlet c of a first liquid separation tank 21 in the acid gas liquid separation sledge 2, a sewage outlet z of the first liquid separation tank 21 is connected with an external sewage pool, and a second outlet d of the first liquid separation tank 21 is connected with a third inlet e of an absorption tank 21 of the absorption sledge 3; a desulfurization liquid inlet j of the absorption tank 31 is connected with an external desulfurization liquid pipe, a tail gas outlet F of the second liquid separation tank 32 is connected with the next process through a discharge pipeline, a third outlet k of the absorption tank 31 is connected with a fourth inlet l of the first regeneration tank 41 in the first regeneration sledge 4, a first regenerated waste air outlet D of the third liquid separation tank 42 is communicated with a waste air discharge pipeline, a fourth outlet m of the first regeneration tank 41 is connected with a fifth inlet n of the second regeneration tank 51 in the second regeneration sledge 5, a second regenerated waste air outlet F of the fourth liquid separation tank 52 is communicated with a waste air discharge pipeline, a fifth outlet o of the second regeneration tank 51 is connected with a sixth inlet p of the third regeneration tank 61 in the third regeneration sledge 6, a third regenerated waste air outlet H of the fifth liquid separation tank 62 is communicated with a waste air discharge pipeline, a sixth outlet q of the third regeneration tank 61 is connected with a seventh inlet r of the settling tank 71 in the sulfur settling sledge 7, the desulfurizer lean solution outlet g of the settling tank 71 is connected with the circulating inlet h of the circulating pump 101 in the circulating pump skid 10, the circulating outlet i of the circulating pump 101 is connected with the desulfurization solution inlet J of the absorption tank 31, the seventh outlet s of the settling tank 71 is connected with the eighth inlet t of the filter 81 in the sulfur slurry filtering skid 8 through a pump, the eighth outlet v of the collecting tank 82 is connected with the ninth inlet J of the settling tank 71 through a pump, the ninth outlet u of the filter 81 is connected with the tenth inlet w of the sulfur melting kettle 91 in the sulfur melting skid 9 through a pump, the tenth outlet y of the sulfur melting kettle 91 is connected with the subsequent process, and the eleventh outlet collecting tank x of the cooling 92 is connected with the eleventh inlet Q of the filter 81 through a pump.
The utility model discloses the technological process of the low pressure sour gas complex iron desulfurization skid-mounted device who contains hydrocarbon gas is as follows:
low-pressure acid gas containing carbon and hydrogen gas from outside (low pressure refers to that the pressure is less than 0.6Mpa, the acid gas containing carbon and hydrogen gas with the pressure less than 0.6Mpa comes from acid crude oil associated gas, acid torch vent gas, oil-gas field acid flash gas and low-pressure acid natural gas) enters from a first inlet a of an acid gas pressurizing sledge 1, flows out from a first outlet b after being pressurized to 0.6Mpa by a booster fan 11 in the acid gas pressurizing sledge 1, enters a first liquid separation tank 21 in the acid gas liquid separation sledge 2 from a second inlet c of the acid gas liquid separation sledge 2, separated free liquid flows out from a sewage outlet z of the first liquid separation tank 21, separated gas phase flows out from a second outlet d of the first liquid separation tank 21, enters an absorption tank 31 in the absorption sledge 3 from a third inlet e of the absorption tank 3 and is in countercurrent contact with sprayed desulfurization liquid entering from a desulfurization liquid inlet j of the absorption tank 31, gas-phase hydrogen sulfide enters a liquid phase and is oxidized into sulfur by ferric organic complex (iron complex for short), the desulfurization catalyst is converted into ferrous organic complex (complex ferrous for short), purified gas is defoamed by a second liquid separation tank 32, then is discharged from a tail gas outlet f and enters a post-process through a discharge pipeline, a desulfurization catalyst rich solution flows out from a third outlet k of an absorption tank 31 under the action of system pressure and enters a first regeneration tank 41 of a first regeneration skid 4 from a fourth inlet l of the first regeneration skid 4, regeneration air of a fan skid 13 enters the first regeneration tank 41 from a first air inlet B of the first regeneration skid 4 for bubbling regeneration to oxidize complex ferrous iron in the desulfurization catalyst rich solution into complex iron, the regenerated waste air is subjected to liquid separation by a third liquid separation tank 42 and then flows out from a first outlet D of the regenerated waste air of the third liquid separation tank 42 in the first regeneration skid 4 to enter a waste air discharge pipeline, and sulfur carried by the desulfurization catalyst solution flows out from a fourth outlet m of the first regeneration tank 41 under the pushing action of bubbling, The regeneration air of the fan sledge 13 enters the second regeneration groove 51 of the second regeneration sledge 5 from the fifth inlet n of the second regeneration sledge 5, enters the second regeneration groove 51 from the second air inlet E of the second regeneration sledge 5 for bubbling regeneration, the complex ferrite in the rich solution of the desulfurization catalyst is changed into the complex iron, the regenerated waste air is subjected to liquid separation by the fourth liquid separation tank 52 and then flows out from the second outlet F of the regenerated waste air of the fourth liquid separation tank 52 in the second regeneration sledge 5 to enter the waste air discharge pipeline, the desulfurization catalyst solution carries the sulfur to flow out from the fifth outlet o of the second regeneration groove 52 under the pushing action of bubbling, and enters the third regeneration groove 61 of the third regeneration sledge 6 from the sixth inlet p of the third regeneration sledge 6, the regeneration air of the fan sledge 13 enters the third regeneration groove 61 from the third air inlet G of the third regeneration sledge 6 for bubbling, and the complex ferrite in the rich solution of the desulfurization catalyst is changed into the complex iron, the regenerated waste air is subjected to liquid separation by the fifth liquid separation tank 62, flows out of a third regenerated waste air outlet H of the fifth liquid separation tank 62 in the third regeneration sledge 6 and enters a waste air discharge pipeline, the desulfurizer solution carries sulfur to flow out of a sixth outlet q of the third regeneration tank 61 under the pushing action of bubbling, enters a settling tank 71 of the sulfur settling sledge 7 from a seventh inlet r of the sulfur settling sledge 7, the sulfur is settled to the bottom of a cone of the settling tank 71, the desulfurization catalyst lean solution is pumped out from a circulating pump 101 in the circulating pump sledge 10 from a desulfurizer lean solution outlet g and is pumped into a desulfurization solution inlet j of the absorption tank 31 to enter the absorption tank for spray absorption, and the circulation of the desulfurization catalyst solution is completed; the sulfur slurry is pumped by a pump in the sulfur slurry settling sledge 7 and flows out from a seventh outlet s of the settling tank 71, enters a filter 81 from an eighth inlet t of the sulfur slurry filtering sledge 8 for liquid-solid separation, filtrate is collected by a collecting tank 82 and flows out from an eighth outlet v of the collecting tank 82, and enters the settling tank 71 from a ninth inlet J of the sulfur settling sledge 7, sulfur paste flows out from a ninth outlet u of the filter 81, enters a sulfur melting kettle 91 from a tenth outlet w of the sulfur melting sledge 9, liquid sulfur flows out from a tenth outlet y of the sulfur melting kettle 91 and enters a post-process sulfur molding step, supernatant generated in sulfur melting is cooled and collected by a cooling collecting tank 92 and flows out from an eleventh outlet x of the cooling collecting tank 92, and flows out from an eleventh inlet Q of the sulfur slurry filtering sledge 8 and enters the filter 81 for washing.
The desulfurization catalyst is an organic complex alkalescent aqueous solution containing ferric iron.
The utility model discloses according to complex iron desulfurization process principle, adopt the modularized design in the technology, skid-mounted design and construction on the engineering can realize single well desulfurization recovery valuable natural gas resource on the spot in desert, Gobi and remote area oil gas field that are not suitable for the scene to be built.