CN111440646A - Oil-gas field wellhead acid gas self-circulation sulfur recovery skid-mounted device and recovery method - Google Patents
Oil-gas field wellhead acid gas self-circulation sulfur recovery skid-mounted device and recovery method Download PDFInfo
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- CN111440646A CN111440646A CN202010318979.2A CN202010318979A CN111440646A CN 111440646 A CN111440646 A CN 111440646A CN 202010318979 A CN202010318979 A CN 202010318979A CN 111440646 A CN111440646 A CN 111440646A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
- C10L3/102—Removal of contaminants of acid contaminants
- C10L3/103—Sulfur containing contaminants
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- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/02—Preparation of sulfur; Purification
- C01B17/0205—Separation of sulfur from liquids, e.g. by coalescence
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/02—Preparation of sulfur; Purification
- C01B17/0221—Melting
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/02—Preparation of sulfur; Purification
- C01B17/04—Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides
- C01B17/05—Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides by wet processes
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Abstract
The invention discloses an oil-gas field wellhead sour gas self-circulation sulfur recovery skid-mounted device, which comprises a sour gas liquid separating skid, an absorption skid, a regeneration skid, at least one regeneration settling skid, a sulfur slurry filtering skid and a sulfur melting skid, wherein the sour gas liquid separating skid comprises a booster fan and a first liquid separating tank, the absorption skid comprises an absorption tank and a second liquid separating tank, the regeneration skid comprises a regeneration tank and a third liquid separating tank connected with the regeneration tank, the regeneration settling skid comprises a first regeneration settling tank and a liquid separating tank connected with the regeneration settling tank, the sulfur slurry filtering skid comprises a filter and a collecting tank connected with the filter, and the sulfur melting skid comprises a sulfur melting kettle and a cooling recovery tank connected with the sulfur melting kettle; also provided is a self-circulation recovery method of the device. According to the complex iron desulfurization process principle, the modular design is adopted in the process, the design and the construction are skid-mounted in the engineering, the single-well on-site desulfurization and recovery of precious natural gas resources can be realized in deserts, Gobi and remote area oil and gas fields which are not suitable for on-site construction, and the movement, the disassembly and the installation are convenient.
Description
Technical Field
The invention relates to the technical field of hydrogen sulfide removal devices and processes, in particular to a wellhead sour gas self-circulation sulfur recovery skid-mounted device and a recovery method for an oil and gas field.
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 content of sulfide is not too low, but the working condition of Claus sulfur recovery is not suitable, and the natural gas can not be desulfurized on site for use; 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 discovered equipment cannot be usedThe natural gas 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.
Disclosure of Invention
Aiming at the technical problems, the invention provides a wellhead sour gas self-circulation sulfur recovery skid-mounted device and a recovery method for an oil and gas field, which are convenient to move, install and detach.
In order to achieve the purpose, the oil-gas field wellhead sour gas self-circulation sulfur recovery skid-mounted device designed by the invention sequentially comprises a sour gas liquid separating skid, an absorption skid, a regeneration skid, at least one regeneration settling skid, a sulfur slurry filtering skid and a sulfur melting skid, wherein the sour gas liquid separating skid comprises a booster fan and a first liquid separating tank connected with the booster fan, the absorption skid comprises an absorption tank and a second liquid separating tank connected with the absorption tank, the regeneration skid comprises a regeneration tank and a third liquid separating tank connected with the regeneration tank, the regeneration settling skid comprises a first regeneration settling tank and a liquid separating tank connected with the regeneration settling tank, the sulfur slurry filtering skid comprises a filter and a collecting tank connected with the filter, and the sulfur melting skid comprises a sulfur melting kettle and a cooling recovery tank connected with the sulfur melting kettle.
Further, the desalting water sledge is further included, and a desalted water outlet W0 of the desalting water sledge is respectively connected with a first desalted water inlet W1 of the absorption tank, a second desalted water inlet W2 of the regeneration tank, a desalted water inlet of the regeneration settling tank and a fifth desalted water inlet W5 of the filter.
Further, the device also comprises a fan sledge, wherein an air outlet of the fan sledge is respectively connected with the first air inlet t of the regeneration tank and the air inlet v of the regeneration settling tank.
Further, the regenerative settling sleds comprise a first regenerative settling sled and a second regenerative settling sled which are sequentially connected in series, the first regenerative settling sleds comprise a first regenerative settling tank and a fourth liquid dividing tank connected with the first regenerative settling tank, and the second regenerative settling sleds comprise a second regenerative settling tank and a fifth liquid dividing tank connected with the second regenerative settling tank.
Further, an acid gas outlet a of a first liquid separation tank in the acid gas liquid separation sledge is connected with an acid gas inlet b of an absorption tank in the absorption sledge, and a sewage port of the first liquid separation tank is connected with an external sewage pool; a first liquid outlet f of the absorption tank is connected with a first liquid inlet g of a regeneration groove in the regeneration sledge, and a tail gas outlet c of a second liquid separation tank in the absorption sledge is communicated with the outside; a second liquid outlet h of the regeneration tank is connected with a liquid inlet of a regeneration settling tank in the regeneration settling sledge, and a regenerated waste air first outlet u of a third liquid separation tank is communicated with a waste air discharge pipeline; a regenerated waste air outlet of the liquid separation tank is communicated with a waste air discharge pipeline, a liquid outlet of the regeneration settling tank is connected with a fourth liquid inlet e of an absorption tank in the absorption skid, and a conical bottom outlet of the regeneration settling tank is connected with a fifth liquid inlet n of a filter in the sulfur slurry filtering skid through a pump; the filtrate outlet p of the collecting tank in the sulfur slurry filtering sledge is connected with the filtrate inlet of the regeneration settling tank, the fifth liquid outlet o of the collecting tank is connected with the sixth liquid inlet q of the sulfur melting kettle in the sulfur melting sledge through a pump, the sixth liquid outlet s of the sulfur melting kettle is connected with the next procedure, and the outlet r of the cooling recovery tank is connected with the filtrate inlet of the regeneration settling tank.
Further, an acid gas outlet a of a first liquid separation tank in the acid gas liquid separation sledge is connected with an acid gas inlet b of an absorption tank in the absorption sledge, and a sewage port of the first liquid separation tank is connected with an external sewage pool; a first liquid outlet f of the absorption tank is connected with a first liquid inlet g of a regeneration groove in the regeneration sledge, and a tail gas outlet c of a second liquid separation tank in the absorption sledge is communicated with the outside; a second liquid outlet h of the regeneration tank is connected with a second liquid inlet i of a first regeneration settling tank in the first regeneration settling sledge, and a first regenerated waste air outlet u of a third liquid separation tank is communicated with a waste air discharge pipeline; a third liquid outlet j of the first regeneration settling tank is connected with a third liquid inlet k of a second regeneration settling tank in a second regeneration settling sledge, a first outlet l at the conical bottom of the first regeneration settling tank is connected with a fifth liquid inlet n of a filter 61 in a sulfur slurry filtering sledge through a pump, and a second outlet w of regenerated waste air of a fourth liquid separation tank is communicated with a waste air discharge pipeline; a fourth liquid outlet d of the second regeneration settling tank is connected with a fourth liquid inlet e of an absorption tank in the absorption sledge, a second outlet m at the conical bottom of the second regeneration settling tank is connected with a fifth liquid inlet n of a filter in the sulfur slurry filtering sledge through a pump, and a third outlet y of regenerated waste air of a fifth liquid separation tank is communicated with a waste air discharge pipeline; and a filtrate outlet p of the collecting tank in the sulfur slurry filtering sledge is connected with a filtrate inlet z of the second regeneration settling tank, a fifth liquid outlet o of the collecting tank is connected with a sixth liquid inlet q of the sulfur melting kettle in the sulfur melting sledge through a pump, a sixth liquid outlet s of the sulfur melting kettle is connected with the next procedure, and an outlet r of the cooling recovery tank is connected with the filtrate inlet z of the second regeneration settling tank.
Also provides a self-circulation recovery method of the oil-gas field wellhead sour gas self-circulation sulfur recovery skid-mounted device, which comprises the following steps:
acid tail gas enters an acid gas liquid separation sledge, firstly passes through a booster fan and then enters a first liquid separation tank to remove free liquid, the acid gas after liquid separation flows out from an acid gas outlet a of the first liquid separation tank, enters an absorption tank 1 from an acid gas inlet b in the absorption sledge and is bubbled and absorbed by a gas phase distributor in the absorption tank, gas-phase hydrogen sulfide enters a liquid phase and is oxidized into sulfur by a ferric organic complex, a desulfurization catalyst is converted into a ferrous organic complex, and purified tail gas enters the outside from a tail gas outlet c of a second liquid separation tank in the absorption sledge; the desulfurization catalyst rich solution flows out from a first liquid outlet f of an absorption tank in the absorption sledge under the power pushing action of acid gas bubbling, enters a regeneration tank from a first liquid inlet g of the regeneration sledge, the regeneration air of a fan sledge enters the regeneration tank from a first air inlet t of the regeneration sledge for bubbling regeneration, the complex ferrous iron in the desulfurization catalyst rich solution is oxidized into complex iron, the regenerated waste air is subjected to liquid separation by a third liquid separation tank and then flows out from a first outlet u of the regenerated waste air of a third liquid separation tank to enter a waste air discharge pipeline, the desulfurization catalyst solution carries sulfur under the pushing action of bubbling, the sulfur flows out from a second liquid outlet h of the regeneration tank in the regeneration sledge and enters a first regeneration settling tank from a second liquid inlet i in the first regeneration settling sledge, the regeneration air of the fan enters a first regeneration settling tank from a second air inlet v of the first regeneration settling sledge for regeneration, and the complex ferrous iron in the desulfurization catalyst is further converted into complex iron, the regenerated waste air is subjected to liquid separation through the fourth liquid separation tank, and then goes out from a second outlet w of the regenerated waste air in the fourth liquid separation tank in the first regeneration sedimentation sledge and enters a waste air discharge pipeline; under the pushing action of bubbling, the desulfurization catalyst solution carries sulfur to flow out of a third liquid outlet j of a first regeneration settling tank in a first regeneration settling sledge and enter a second regeneration settling tank from a third liquid inlet k of the second regeneration settling sledge, part of the sulfur in the first regeneration settling tank is settled to the bottom of a cone of the first regeneration settling tank, sulfur slurry is pumped out from the bottom of the cone and flows out of a first outlet l at the bottom of the cone of the first regeneration settling tank, and the sulfur slurry is subjected to liquid-solid separation from a fifth liquid inlet n filter of a sulfur slurry filtering sledge; the regeneration air of the fan sledge enters a second regeneration settling tank from a third air inlet x of the second regeneration settling sledge for bubbling regeneration, the complex ferrous iron in the desulfurization catalyst is further converted into complex iron, the regenerated waste air is subjected to liquid separation through a fifth liquid separation tank and then is discharged from a third outlet y of the regenerated waste air of the fifth liquid separation tank to enter a waste air discharge pipeline, the desulfurization catalyst solution flows out from a fourth liquid outlet d of the second regeneration settling tank in the second regeneration settling sledge under the pushing action of bubbling and enters an absorption tank of the absorption sledge from a fourth liquid inlet e of the absorption sledge, and the desulfurization catalyst completes circulation; the sulfur is settled and concentrated at the bottom of the second regeneration settling tank cone of the second regeneration settling sledge, the sulfur slurry is pumped out from the bottom cone body part and flows out from a second outlet m at the bottom of the second regeneration settling tank cone, the sulfur slurry enters a filter of the sulfur slurry filtering sledge from a fifth liquid inlet n of the sulfur slurry filtering sledge for liquid-solid separation, the filtrate is collected by a collecting tank and flows out from a filtrate outlet p of the collecting tank, the filtrate enters the second regeneration settling tank in the second regeneration settling sledge from a filtrate inlet z of the second regeneration settling sledge, the sulfur paste flows out from a fifth liquid outlet o of the collecting tank of the sulfur slurry filtering sledge and enters a sulfur melting kettle in the sulfur melting sledge from a sixth liquid outlet q of the sulfur melting sledge, and the liquid sulfur flows out from a sixth liquid outlet s of the sulfur melting kettle in the sulfur melting sledge and enters the post-process sulfur molding, and the supernatant generated in the molten sulfur flows out of an outlet r of the cooling recovery tank in the molten sulfur sledge after passing through the cooling recovery tank, and enters a second regeneration settling tank in the second regeneration settling sledge from a filtrate inlet z of the second regeneration settling sledge.
Compared with the prior art, the invention has the following advantages: according to the complex iron desulfurization process principle, the modular design is adopted in the process, the design and the construction are skid-mounted in the engineering, the single-well on-site desulfurization and recovery of precious natural gas resources can be realized in deserts, Gobi and remote area oil and gas fields which are not suitable for on-site construction, and the movement, the disassembly and the installation are convenient.
Drawings
FIG. 1 is a schematic flow diagram of the self-circulation sulfur recovery skid-mounted device for acid gas at the wellhead of an oil and gas field.
Detailed Description
The invention is described in further detail below with reference to the figures and the specific embodiments.
As shown in fig. 1, the oil and gas field wellhead sour gas self-circulation sulfur recovery skid-mounted device sequentially comprises a sour gas separating skid 1, an absorbing skid 2, a regeneration skid 3, at least one regeneration settling skid, a sulfur slurry filtering skid 6 and a sulfur melting skid 7, in this embodiment, the regeneration settling skid comprises a first regeneration settling skid 4 and a second regeneration settling skid 5 which are sequentially connected in series, wherein the sour gas separating skid 1 comprises a booster fan 11 and a first liquid separating tank 12 connected with the booster fan 11, the absorbing skid 2 comprises an absorbing tank 21 and a second liquid separating tank 22 connected with the absorbing tank 21, the regeneration skid 3 comprises a regeneration tank 31 and a third liquid separating tank 32 connected with the regeneration tank 31, the first regeneration settling tank 4 comprises a first regeneration settling tank 41 and a fourth liquid separating tank 42 connected with the first regeneration settling tank 41, the second regeneration settling skid 5 comprises a second regeneration settling tank 51 and a fifth liquid separating tank 52 connected with the second regeneration settling tank 51, the sulfur slurry filtering sledge 6 comprises a filter 61 and a collecting tank 62 connected with the filter 61, and the sulfur melting sledge 7 comprises a sulfur melting kettle 71 and a cooling recovery tank 72 connected with the sulfur melting kettle 71. Meanwhile, a desalted water outlet W0 of the desalted water skid 8 is respectively connected with a first desalted water inlet W1 of the absorption tank 21, a second desalted water inlet W2 of the regeneration tank 31, a third desalted water inlet W3 of the first regeneration settling tank 41, a fourth desalted water inlet W4 of the second regeneration settling tank 51 and a fifth desalted water inlet W5 of the filter 61, and the desalted water skid 8 is used for replenishing water and flushing the absorption skid, the regeneration settling skid and the sulfur slurry filtering skid; an air outlet of the fan sledge 9 is respectively connected with a first air inlet t of the regeneration tank, a second air inlet v of the first regeneration settling tank and a third air inlet x of the second regeneration settling tank, and the fan sledge 9 is used for blowing air to the regeneration sledge and the regeneration settling sledge.
Wherein, an acid gas outlet a of a first liquid separation tank 12 in the acid gas liquid separation sledge 1 is connected with an acid gas inlet b of an absorption tank 21 in the absorption sledge 2, and a sewage port of the first liquid separation tank 12 is connected with an external sewage pool; a first liquid outlet f of the absorption tank 21 is connected with a first liquid inlet g of a regeneration tank 31 in the regeneration sledge 3, and a tail gas outlet c of a second liquid separation tank 22 in the absorption sledge 2 is communicated with the outside; a second liquid outlet h of the regeneration tank 31 is connected with a second liquid inlet i of a first regeneration settling tank 41 in the first regeneration settling sledge 4, and a first regenerated waste air outlet u of a third liquid separation tank 32 is communicated with a waste air discharge pipeline; a third liquid outlet j of the first regenerative settling tank 41 is connected with a third liquid inlet k of a second regenerative settling tank 51 in the second regenerative settling sledge 5, a first outlet l at the conical bottom of the first regenerative settling tank 41 is connected with a fifth liquid inlet n of a filter 61 in the sulfur slurry filtering sledge 6 through a pump, and a second outlet w of regenerated waste air of the fourth liquid distributing tank 42 is communicated with a waste air discharge pipeline; a fourth liquid outlet d of the second regeneration settling tank 51 is connected with a fourth liquid inlet e of the absorption tank 21 in the absorption skid 2, a second outlet m at the conical bottom of the second regeneration settling tank 51 is connected with a fifth liquid inlet n of a filter 61 in the sulfur slurry filtering skid 6 through a pump, and a third outlet y of the regenerated waste air of the fifth liquid separating tank 52 is communicated with a waste air discharge pipeline; a filtrate outlet p of a collecting tank 62 in the sulfur slurry filtering sledge 6 is connected with a filtrate inlet z of the second regeneration settling tank 51, a fifth liquid outlet o of the collecting tank 62 is connected with a sixth liquid inlet q of a sulfur melting kettle 71 in the sulfur melting sledge 7 through a pump, a sixth liquid outlet s of the sulfur melting kettle 71 is connected with the next procedure, and an outlet r of a cooling recovery tank 72 is connected with the filtrate inlet z of the second regeneration settling tank 51.
The self-circulation recovery process of the oil-gas field wellhead acid gas self-circulation sulfur recovery skid-mounted device comprises the following steps:
acid tail gas (the acid tail gas is from the acid tail gas of an acid water stripping device and the acid tail gas of an amine liquid desulfurization and decarbonization device) enters an acid gas liquid separation skid 1, the acid gas after liquid separation firstly passes through a booster fan 11 and then enters a first liquid separation tank 12 to remove free liquid, the acid gas after liquid separation flows out from an acid gas outlet a of the first liquid separation tank 12, enters an absorption tank 21 from an acid gas inlet b in the absorption skid 2 and is bubbled and absorbed through a gas phase distributor in the absorption tank 21, gas-phase hydrogen sulfide enters a liquid phase and is oxidized into sulfur by a ferric organic complex (complex iron for short), a desulfurization catalyst is converted into a ferrous organic complex (complex iron for short), and purified tail gas enters the outside from a tail gas outlet c of a second liquid separation tank 22 in the absorption skid; the desulfurization catalyst rich solution flows out from a first liquid outlet f of an absorption tank 21 in the absorption skid 2 under the power pushing action of acid gas bubbling, enters a regeneration tank 31 from a first liquid inlet g of the regeneration skid 3, the regeneration air of the fan skid 9 enters the regeneration tank 31 from a first air inlet t of the regeneration skid 3 for bubbling regeneration, the complexing iron in the desulfurization catalyst rich solution is oxidized into complexing iron, the regenerated waste air passes through a third liquid separation tank 32 for liquid separation, then flows out from a first outlet u of the regenerated waste air of the third liquid separation tank 32 and enters a waste air discharge pipeline, the desulfurization catalyst solution carries sulfur under the pushing action of bubbling, flows out from a second liquid outlet h of the regeneration tank 31 in the regeneration skid 3, enters a first regeneration settling tank 41 from a second liquid inlet i in the first regeneration settling tank 4, the regeneration air of the fan skid 9 enters the first regeneration settling tank 41 from a second air inlet v of the first regeneration settling tank 4 for bubbling, further converting the complex ferrous iron in the desulfurization catalyst into complex iron, and discharging the regenerated waste air from a second outlet w of the regenerated waste air in a fourth liquid division tank 42 of the first regeneration settling sledge 4 after liquid division in the fourth liquid division tank 42 and entering a waste air discharge pipeline; under the pushing action of bubbling, the desulfurization catalyst solution carries sulfur to flow out of a third liquid outlet j of a first regenerative settling tank 41 in a first regenerative settling sledge 4 and enter a second regenerative settling tank 51 from a third liquid inlet k of a second regenerative settling sledge 5, while part of the sulfur in the first regenerative settling tank 51 is settled to the bottom of a cone of the first regenerative settling tank 51, sulfur slurry is pumped out from the bottom of the cone and flows out of a first outlet l at the bottom of the cone of the first regenerative settling tank 51, and the sulfur slurry is subjected to liquid-solid separation from a fifth liquid inlet n filter 61 of a sulfur slurry filtering sledge 6; the regeneration air of the fan sledge 9 enters the second regeneration settling tank 51 from the third air inlet x of the second regeneration settling sledge 5 for bubbling regeneration, the complexed ferrous iron in the desulfurization catalyst is further converted into complexed iron, the regenerated waste air is subjected to liquid separation by the fifth liquid separation tank 52 and then is discharged from the third outlet y of the regenerated waste air of the fifth liquid separation tank 52 to enter a waste air discharge pipeline, the desulfurization catalyst solution flows out from the fourth liquid outlet d of the second regeneration settling tank 51 in the second regeneration settling sledge 5 under the pushing action of bubbling and enters the absorption tank 21 of the absorption sledge 2 from the fourth liquid inlet e of the absorption sledge 2, and the desulfurization catalyst completes circulation; the sulfur is settled and concentrated at the conical bottom of the second regenerative settling tank 51 of the second regenerative settling sledge 5, the sulfur slurry is pumped out from the bottom cone part and flows out from the second outlet m at the conical bottom of the second regenerative settling tank 51, the sulfur slurry enters the filter 61 of the sulfur slurry filtering sledge 6 from the fifth liquid inlet n of the sulfur slurry filtering sledge 6 for liquid-solid separation, the filtrate is collected by the collecting tank 62 and flows out from the filtrate outlet p of the collecting tank 62, the filtrate enters the second regenerative settling tank 51 of the second regenerative settling sledge 5 from the filtrate inlet z of the second regenerative settling sledge 5, the sulfur paste flows out from the fifth liquid outlet o of the collecting tank 62 of the sulfur slurry filtering sledge 6, and enters the sulfur melting kettle 71 in the sulfur melting sledge 7 from the sixth liquid inlet q of the sulfur melting sledge 7, the liquid sulfur flows out from the sixth liquid outlet of the sulfur melting kettle 71 in the sulfur melting sledge 7 and is formed in the post-working procedure, the supernatant produced in the sulfur melting kettle passes through the cooling recovery tank 72 and flows out from the outlet r of the sulfur melting sledge 7, From the filtrate inlet z of the second regenerative settling skid 5, into the second regenerative settling tank 51 in the second regenerative settling skid 5.
The desulfurization catalyst is an organic complex alkalescent aqueous solution containing ferric iron.
According to the complex iron desulfurization process principle, the modular design is adopted in the process, the design and the construction are skid-mounted in the engineering, the single-well on-site desulfurization and recovery of precious natural gas resources can be realized in deserts, Gobi and remote area oil and gas fields which are not suitable for on-site construction, and the movement, the disassembly and the installation are convenient.
Claims (7)
1. The utility model provides an oil gas field well head sour gas self-loopa sulphur recovery skid-mounted device which characterized in that: sequentially comprises an acid gas liquid separation sledge (1), an absorption sledge (2), a regeneration sledge (3), at least one regeneration settling sledge, a sulfur slurry filtering sledge (6) and a sulfur melting sledge (7), the acid gas separating sledge (1) comprises a booster fan (11) and a first liquid separating tank (12) connected with the booster fan (11), the absorption sledge (2) comprises an absorption tank (21) and a second liquid separation tank (22) connected with the absorption tank (21), the regeneration sledge (3) comprises a regeneration tank (31) and a third liquid separation tank (32) connected with the regeneration tank (31), the regeneration settling sledge comprises a first regeneration settling tank and a liquid separating tank connected with the regeneration settling tank, the sulfur slurry filtering sledge (6) comprises a filter (61) and a collecting tank (62) connected with the filter (61), the sulfur melting sledge (7) comprises a sulfur melting kettle (71) and a cooling recovery tank (72) connected with the sulfur melting kettle (71).
2. The oil and gas field wellhead sour gas self-circulation sulfur recovery skid-mounted device of claim 1, which is characterized in that: the desalting water skid device further comprises a desalting water skid (8), and a desalting water outlet W0 of the desalting water skid (8) is respectively connected with a first desalting water inlet W1 of the absorption tank (21), a second desalting water inlet W2 of the regeneration tank (31), a desalting water inlet of the regeneration settling tank and a fifth desalting water inlet W5 of the filter (61).
3. The oil and gas field wellhead sour gas self-circulation sulfur recovery skid-mounted device of claim 1, which is characterized in that: the device is characterized by further comprising a fan sledge (9), wherein an air outlet of the fan sledge (9) is respectively connected with a first air inlet t of the regeneration tank and an air inlet of the regeneration settling tank.
4. The oil and gas field wellhead sour gas self-circulation sulfur recovery skid-mounted device of claim 1, which is characterized in that: the regeneration settling sledge comprises a first regeneration settling sledge (4) and a second regeneration settling sledge (5) which are sequentially connected in series, the first regeneration settling sledge (4) comprises a first regeneration settling tank (41) and a fourth liquid dividing tank (42) connected with the first regeneration settling tank (41), and the second regeneration settling sledge (5) comprises a second regeneration settling tank (51) and a fifth liquid dividing tank (52) connected with the second regeneration settling tank (51).
5. The oil and gas field wellhead sour gas self-circulation sulfur recovery skid-mounted device of claim 1, which is characterized in that: an acid gas outlet a of a first liquid separation tank (12) in the acid gas liquid separation sledge (1) is connected with an acid gas inlet b of an absorption tank (21) in the absorption sledge (2), and a sewage port of the first liquid separation tank (12) is connected with an external sewage pool; a first liquid outlet f of the absorption tank (21) is connected with a first liquid inlet g of a regeneration groove (31) in the regeneration sledge (3), and a tail gas outlet c of a second liquid separation tank (22) in the absorption sledge (2) is communicated with the outside; a second liquid outlet h of the regeneration tank (31) is connected with a liquid inlet of a regeneration settling tank in the regeneration settling sledge, and a first regenerated waste air outlet u of a third liquid separation tank (32) is communicated with a waste air discharge pipeline; a regenerated waste air outlet of the liquid separation tank is communicated with a waste air discharge pipeline, a liquid outlet of the regeneration settling tank is connected with a fourth liquid inlet e of an absorption tank (21) in the absorption sledge (2), and a conical bottom outlet of the regeneration settling tank is connected with a fifth liquid inlet n of a filter (61) in the sulfur slurry filtering sledge (6) through a pump; a filtrate outlet p of a collecting tank (62) in the sulfur slurry filtering sledge (6) is connected with a filtrate inlet of the regeneration settling tank, a fifth liquid outlet o of the collecting tank (62) is connected with a sixth liquid inlet q of a sulfur melting kettle (71) in the sulfur melting sledge (7) through a pump, a sixth liquid outlet s of the sulfur melting kettle (71) is connected with the next procedure, and an outlet r of a cooling recovery tank (72) is connected with a filtrate inlet z of the second regeneration settling tank (51).
6. The oil and gas field wellhead sour gas self-circulation sulfur recovery skid-mounted device of claim 4, which is characterized in that: an acid gas outlet a of a first liquid separation tank (12) in the acid gas liquid separation sledge (1) is connected with an acid gas inlet b of an absorption tank (21) in the absorption sledge (2), and a sewage port of the first liquid separation tank (12) is connected with an external sewage pool; a first liquid outlet f of the absorption tank (21) is connected with a first liquid inlet g of a regeneration groove (31) in the regeneration sledge (3), and a tail gas outlet c of a second liquid separation tank (22) in the absorption sledge (2) is communicated with the outside; a second liquid outlet h of the regeneration tank (31) is connected with a second liquid inlet i of a first regeneration settling tank (41) in the first regeneration settling sledge (4), and a first regenerated waste air outlet u of a third liquid separation tank (32) is communicated with a waste air discharge pipeline; a third liquid outlet j of the first regeneration settling tank (41) is connected with a third liquid inlet k of a second regeneration settling tank (51) in the second regeneration settling sledge (5), a first outlet l at the conical bottom of the first regeneration settling tank (41) is connected with a fifth liquid inlet n of a filter (61) in the sulfur slurry filtering sledge (6) through a pump, and a second outlet w of regenerated waste air of a fourth liquid separation tank (42) is communicated with a waste air discharge pipeline; a fourth liquid outlet d of the second regeneration settling tank (51) is connected with a fourth liquid inlet e of an absorption tank (21) in the absorption sledge (2), a second outlet m at the conical bottom of the second regeneration settling tank (51) is connected with a fifth liquid inlet n of a filter (61) in the sulfur slurry filtering sledge (6) through a pump, and a third outlet y of regenerated waste air of a fifth liquid separation tank (52) is communicated with a waste air discharge pipeline; a filtrate outlet p of a collecting tank (62) in the sulfur slurry filtering sledge (6) is connected with a filtrate inlet z of a second regeneration settling tank (51), a fifth liquid outlet o of the collecting tank (62) is connected with a sixth liquid inlet q of a sulfur melting kettle (71) in the sulfur melting sledge (7) through a pump, a sixth liquid outlet s of the sulfur melting kettle (71) is connected with the next procedure, and an outlet r of a cooling recovery tank (72) is connected with the filtrate inlet z of the second regeneration settling tank (51).
7. The self-circulation recovery method of the oil-gas field wellhead sour gas self-circulation sulfur recovery skid-mounted device is characterized by comprising the following steps of: the self-circulation recovery method comprises the following steps:
acid tail gas enters an acid gas separating sledge (1), firstly passes through a booster fan (11) and then enters a first liquid separating tank (12) to remove free liquid, the acid gas after liquid separation flows out from an acid gas outlet a of the first liquid separating tank (12), enters an absorption tank (21) from an acid gas inlet b in the absorption sledge (2) and is bubbled and absorbed through a gas phase distributor in the absorption tank (21), gas-phase hydrogen sulfide enters a liquid phase and is oxidized into sulfur by a ferric iron organic complex, a desulfurization catalyst is converted into a ferrous iron organic complex, and purified tail gas enters the outside from a tail gas outlet c of a second liquid separating tank (22) in the absorption sledge (2); the desulfurization catalyst rich solution flows out from a first liquid outlet f of an absorption tank (21) in an absorption sledge (2) under the power pushing action of acid gas bubbling, enters a regeneration tank (31) from a first liquid inlet g of the regeneration sledge (3), the regeneration air of a fan sledge (9) enters the regeneration tank (31) from a first air inlet t of the regeneration sledge (3) for bubbling regeneration, the complex ferrite in the desulfurization catalyst rich solution is converted into complex iron, the regenerated waste air passes through a third liquid separation tank (32) for liquid separation and then flows out from a first outlet u of the regenerated waste air of the third liquid separation tank (32) to enter a waste air discharge pipeline, the desulfurization catalyst solution carries sulfur under the pushing action of bubbling, the sulfur flows out from a second liquid outlet h of the regeneration tank (31) in the regeneration sledge (3), and enters a first regeneration settling tank (41) from a second liquid inlet i in the first regeneration settling sledge (4), and the regeneration air of the fan sledge (9) enters a first regeneration settling tank (41) from a second air inlet v of the first regeneration settling tank (4) The raw settling tank (41) is used for bubbling regeneration, the complex ferrous iron in the desulfurization catalyst is further converted into complex iron, and the regenerated waste air is separated by the fourth liquid separation tank (42) and then is discharged from a second outlet w of the regenerated waste air of the fourth liquid separation tank (42) in the first regeneration settling sledge (4) to enter a waste air discharge pipeline; under the pushing action of bubbling, the desulfurization catalyst solution carries sulfur to flow out of a third liquid outlet j of a first regeneration settling tank (41) in a first regeneration settling sledge (4) and enter a second regeneration settling tank (51) from a third liquid inlet k of a second regeneration settling sledge (5), part of the sulfur in the first regeneration settling tank (51) is settled to the bottom of a cone of the first regeneration settling tank (51), sulfur slurry is pumped out from the bottom of the cone and flows out of a first outlet l at the bottom of the cone of the first regeneration settling tank (51), and liquid-solid separation is carried out from a fifth liquid inlet n filter (61) of a sulfur slurry filtering sledge (6); the regeneration air of the fan sledge (9) enters a second regeneration settling tank (51) from a third air inlet x of the second regeneration settling sledge (5) for bubbling regeneration, the complex ferrous iron in the desulfurization catalyst is further converted into complex iron, the regenerated waste air is subjected to liquid separation by a fifth liquid separation tank (52), then is discharged from a third outlet y of the regenerated waste air of the fifth liquid separation tank (52) and enters a waste air discharge pipeline, the desulfurization catalyst solution flows out from a fourth liquid outlet d of the second regeneration settling tank (51) in the second regeneration settling sledge (5) under the pushing action of bubbling and enters an absorption tank (21) of the absorption sledge (2) from a fourth liquid inlet e of the absorption sledge (2), and the desulfurization catalyst completes circulation; the sulfur is settled and concentrated at the bottom of the cone of the second regenerative settling tank (51) of the second regenerative settling sledge (5), sulfur slurry is pumped out from the bottom cone part and flows out from the second outlet m at the conical bottom of the second regenerative settling tank (51), the sulfur slurry enters the filter (61) of the sulfur slurry filtering sledge (6) from the fifth liquid inlet n of the sulfur slurry filtering sledge (6) for liquid-solid separation, the filtrate is collected by the collecting tank (62) and flows out from the filtrate outlet p of the collecting tank (62), the filtrate enters the second regenerative settling tank (51) of the second regenerative settling sledge (5) from the filtrate inlet z of the second regenerative settling sledge (5), sulfur paste flows out from the fifth liquid outlet o of the collecting tank (62) of the sulfur slurry filtering sledge (6), and flows out from the sixth liquid inlet q of the sulfur melting sledge (7) and enters the sulfur melting kettle (71) in the sulfur melting sledge (7), and the sulfur is formed, and supernatant generated in the molten sulfur flows out of an outlet r of the cooling recovery tank in the molten sulfur sledge (7) after passing through a cooling recovery tank (72), and enters a second regenerative settling tank (51) in the second regenerative settling sledge (5) from a filtrate inlet z of the second regenerative settling sledge (5).
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