CN117599608A - Acid gas purification and sulfur recycling treatment method and treatment system - Google Patents
Acid gas purification and sulfur recycling treatment method and treatment system Download PDFInfo
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- CN117599608A CN117599608A CN202311636448.8A CN202311636448A CN117599608A CN 117599608 A CN117599608 A CN 117599608A CN 202311636448 A CN202311636448 A CN 202311636448A CN 117599608 A CN117599608 A CN 117599608A
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- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title claims abstract description 176
- 229910052717 sulfur Inorganic materials 0.000 title claims abstract description 174
- 239000011593 sulfur Substances 0.000 title claims abstract description 174
- 239000002253 acid Substances 0.000 title claims abstract description 79
- 238000000034 method Methods 0.000 title claims abstract description 52
- 238000004064 recycling Methods 0.000 title claims abstract description 12
- 238000000746 purification Methods 0.000 title claims description 15
- 239000007789 gas Substances 0.000 claims abstract description 79
- 238000010521 absorption reaction Methods 0.000 claims abstract description 76
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 51
- 230000003647 oxidation Effects 0.000 claims abstract description 50
- 230000008569 process Effects 0.000 claims abstract description 33
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims abstract description 23
- 238000003860 storage Methods 0.000 claims abstract description 19
- 229910000037 hydrogen sulfide Inorganic materials 0.000 claims abstract description 17
- 239000013043 chemical agent Substances 0.000 claims abstract description 9
- 238000006479 redox reaction Methods 0.000 claims abstract description 7
- 238000005516 engineering process Methods 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims description 82
- 239000000706 filtrate Substances 0.000 claims description 51
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 32
- 238000000926 separation method Methods 0.000 claims description 25
- 238000003756 stirring Methods 0.000 claims description 25
- 238000002844 melting Methods 0.000 claims description 23
- 230000008018 melting Effects 0.000 claims description 23
- 239000007800 oxidant agent Substances 0.000 claims description 22
- 238000011084 recovery Methods 0.000 claims description 21
- 238000002156 mixing Methods 0.000 claims description 20
- 239000000498 cooling water Substances 0.000 claims description 13
- 230000003020 moisturizing effect Effects 0.000 claims description 12
- 238000005303 weighing Methods 0.000 claims description 11
- 238000001914 filtration Methods 0.000 claims description 10
- 239000000428 dust Substances 0.000 claims description 9
- 238000012856 packing Methods 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 9
- 239000002002 slurry Substances 0.000 claims description 9
- 210000001503 joint Anatomy 0.000 claims description 6
- 238000004806 packaging method and process Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 5
- 238000007872 degassing Methods 0.000 claims description 4
- 238000010309 melting process Methods 0.000 claims description 4
- 230000003197 catalytic effect Effects 0.000 claims description 3
- 238000005469 granulation Methods 0.000 claims description 3
- 230000003179 granulation Effects 0.000 claims description 3
- 239000007791 liquid phase Substances 0.000 claims description 3
- 230000007613 environmental effect Effects 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000012535 impurity Substances 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 3
- 239000000779 smoke Substances 0.000 abstract description 3
- 239000003814 drug Substances 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 51
- 229910000831 Steel Inorganic materials 0.000 description 11
- 239000011259 mixed solution Substances 0.000 description 11
- 239000010959 steel Substances 0.000 description 11
- 239000002245 particle Substances 0.000 description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- 239000006096 absorbing agent Substances 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 4
- 239000003345 natural gas Substances 0.000 description 4
- 230000001590 oxidative effect Effects 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000006477 desulfuration reaction Methods 0.000 description 3
- 230000023556 desulfurization Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 241000282414 Homo sapiens Species 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000012065 filter cake Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- 239000002341 toxic gas Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 208000005374 Poisoning Diseases 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 210000003169 central nervous system Anatomy 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 231100000739 chronic poisoning Toxicity 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 235000013601 eggs Nutrition 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-M hydrogensulfate Chemical compound OS([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-M 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011344 liquid material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000012452 mother liquor Substances 0.000 description 1
- 150000002898 organic sulfur compounds Chemical class 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000012858 packaging process Methods 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8678—Removing components of undefined structure
- B01D53/8681—Acidic components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/38—Removing components of undefined structure
- B01D53/40—Acidic components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/52—Hydrogen sulfide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/73—After-treatment of removed components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8603—Removing sulfur compounds
- B01D53/8612—Hydrogen sulfide
-
- 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
-
- 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
- C01B17/0237—Converting into particles, e.g. by granulation, milling
-
- 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
- C01B17/0495—Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides by dissociation of hydrogen sulfide into the elements
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Treating Waste Gases (AREA)
Abstract
An acid gas purifying and sulfur recycling treatment method and a treatment system belong to the technical field of acid gas treatment, and aim to solve the problem that equipment and pipelines in the treatment and storage and transportation processes are corroded if acid components and impurities are not removed, so that the safe operation of a device is seriously affected; the invention removes hydrogen sulfide and the like in the acid gas through absorption and oxidation-reduction reaction of the acid gas and chemical agents in the absorption oxidation reactor, ensures that the discharged gas meets the environmental protection standard requirement, and generates sulfur with stable performance and convenient transportation and storage so as to meet the requirements of production technology and safety and environmental protection; according to the invention, different processes are flexibly selected according to the difference of raw material components, namely, the solution circulation amount and the medicament addition amount of the absorption oxidation reactor are flexibly controlled according to the difference of acid gas flow and smoke components, so that the material loss is reduced, and the running cost is reduced.
Description
Technical Field
The invention relates to the technical field of acid gas treatment, in particular to a method and a system for acid gas purification and sulfur recycling treatment.
Background
In the purification, petrochemical and coal gasification processes of natural gas in oil and gas fields, the feed gas typically contains a certain amount of hydrogen sulfide, carbon dioxide, organic sulfur compounds, etc., collectively referred to as acid gas. Hydrogen sulfide is a colorless and toxic gas with the irritating foul smell of the rotten eggs, can paralyze the central nervous system of a human body, can cause chronic poisoning by frequent contact with the hydrogen sulfide, and has strong reducibility. Hydrogen sulfide is easy to thermally decompose, metal is easy to corrode in the presence of oxygen, hydrogen sulfide also can generate hydrogen embrittlement corrosion, and meanwhile, hydrogen sulfide is easy to be adsorbed to the active center of a catalyst to cause 'poisoning' of the catalyst, and hydrogen sulfate can be formed to cause stronger corrosion to the environment in the presence of water. As known from the authorized publication number CN111204715a, a system and a method for combined treatment of waste sulfuric acid and acid gas are disclosed, the treatment system is sequentially connected with a cracking furnace, a waste heat boiler, an air preheater, a dynamic wave scrubber, a packed tower, a two-stage electric demister, a drying tower, a first converter, a first absorption tower, a second converter, a second absorption tower and a tail absorption tower, the first absorption tower is connected with a first-stage tower circulation tank, and the first-stage tower circulation tank is connected with a finished acid tank.
However, in the processes of natural gas purification, petrochemical industry and coal gasification of oil and gas fields, the existence of acid gas in raw gas has considerable harm, if the acid components and impurities are not removed, equipment and pipelines in the processes of treatment, storage and transportation are corroded, so that the safe operation of the device is seriously affected, the raw gas is used as fuel to pollute the environment, hydrogen sulfide is toxic gas and endanger the health of human beings, when the raw gas is used as fuel, the carbon dioxide content in the natural gas exceeds the standard, the heat value of the natural gas is reduced, and the emission of combustion products cannot meet the requirements of environmental protection standards.
Disclosure of Invention
The invention aims to provide an acid gas purifying and sulfur recycling treatment method and a treatment system, which solve the problem that in the background technology, if acid components and impurities are not removed, equipment and pipelines are corroded in the treatment and storage and transportation processes, so that the safe operation of a device is seriously affected.
In order to achieve the above purpose, the present invention provides the following technical solutions: the acid gas purifying and sulfur recycling treatment method comprises the following steps:
the acid gas absorption reaction treatment process adopts a liquid phase catalytic oxidation method sulfur recovery technology, the acid gas is purified into a wet method recovery process, the acid gas from a liquid tank is sent into an absorption oxidation reactor to undergo an absorption and oxidation reduction reaction with a chemical agent, hydrogen sulfide in the acid gas is removed, and the purified gas is discharged from the top of the absorption oxidation reactor;
the method comprises the steps of (1) a vacuum belt type filtering process, pumping the removed sulfur and part of solution from the bottom of an absorption oxidation reactor into a vacuum belt type filter, filtering to form a sulfur cake, and sending the sulfur cake into a stirring and mixing tank to be fully stirred, mixed, diluted and the like with desalted water;
the liquid sulfur separation and melting process is carried out by pumping solution into the next device, and a series of preheating, heating, separation and other processes are carried out to form molten state liquid sulfur;
the liquid sulfur is subjected to granulation molding, metering, packaging and other processes to complete the recovery, transportation and storage of sulfur.
The utility model provides an acid gas purifies and sulfur resource recovery processing system, includes the absorption oxidation reactor, and one side of absorption oxidation reactor is provided with first sour gas liquid separation jar and second air-blower, and the opposite side of absorption oxidation reactor is provided with the second solution pump, and the second air-blower provides the oxidation wind for absorption oxidation reactor, and first sour gas liquid separation jar is external to have the condensate pump, and the second solution pump is used for receiving absorption oxidation reactor exhaust solution.
Further, the conveying end of second solution pump discharge sulfur solution is provided with vacuum belt filter, filtrate case and filtrate pump are installed to vacuum belt filter's lower extreme, the filtrate case is located one side of filtrate pump, vacuum belt filter's conveying end is provided with the stirring blending tank, the third solution pump is installed to the conveying end of stirring blending tank, the output of third solution pump is provided with the pre-heater, the pre-heater is provided with two conveying ends, the condenser is installed to the output of pre-heater, the conveying end of condenser is provided with the steam flash tank, sulfur separator is installed to the other output of pre-heater, sulfur separator returns hot water for the pre-heater, sulfur separator returns steam for the steam flash tank.
Further, the conveying end of sulfur separator is provided with the sulfur melting cauldron, the sulfur oar jar is installed to the conveying end of sulfur melting cauldron, the conveying end of sulfur oar jar is provided with the sulfur oar pump, the sulfur make-up machine is installed to the conveying end of sulfur oar pump, the upper surface of sulfur make-up machine is provided with the degassing fan, the lifting machine is installed to the one end of sulfur make-up machine, the conveying end of lifting machine is provided with the feed bin, the feed bin is provided with two conveying ends, the packing weighing machine is installed to one conveying end of feed bin, the other conveying end of feed bin is provided with the dust remover, roller conveyor is installed to the conveying end of packing weighing machine, the surface mounting of dust remover has the fan blade.
Further, the first acid gas liquid separating tank is correspondingly provided with a second acid gas liquid separating tank, the second acid gas liquid separating tank is provided with two conveying ends, one conveying end of the second acid gas liquid separating tank is provided with a first solution return pump, the other conveying end of the second acid gas liquid separating tank is provided with an absorption oxidizer, one side of the second acid gas liquid separating tank is provided with a first blower, the absorption oxidizer is provided with two conveying ends, one conveying end of the absorption oxidizer is provided with a second solution return pump, the second solution return pump is used for returning sulfur slurry solution to the inside of the absorption oxidizer, and the other conveying end of the absorption oxidizer is provided with a first solution pump.
Further, a solution heat exchanger is arranged at the conveying end of the first solution pump, the conveying end of the solution heat exchanger is in butt joint with the absorption oxidizer, a temperature-adjusting water pump is arranged on one side of the solution heat exchanger, a temperature-adjusting water heat exchanger is arranged at the conveying end of the temperature-adjusting water pump, the conveying end of the temperature-adjusting water heat exchanger is in butt joint with the temperature-adjusting water pump, a factory wind buffer tank is arranged on one side of the absorption oxidizer, and the conveying end of the factory wind buffer tank is in butt joint with the absorption oxidizer.
Further, a vacuum filter is arranged on one side of the absorption oxidation reactor, a sulfur melting device is arranged on one side of the vacuum filter, and a granulating and forming device is arranged on one side of the sulfur melting device.
Further, the conveying end of the vacuum belt filter is provided with a first filtrate collecting tank, a vacuum pump is installed on one side of the first filtrate collecting tank, the vacuum pump is communicated with the first filtrate collecting tank, the conveying end of the vacuum pump corresponds to a filtrate tank, a filtrate return pump is arranged on one side of the filtrate tank, and the filtrate return pump is communicated with the filtrate tank.
Further, the inside of stirring blending tank is provided with the agitator, and one side of stirring blending tank is provided with the moisturizing pump, and the moisturizing pump is provided with two conveying ends, and a conveying end of moisturizing pump interfaces with the stirring blending tank, and the second filtrate collecting tank is installed to another conveying end of moisturizing pump, and the conveying end of second filtrate collecting tank is provided with the condensate pump.
Further, a cooling water tank is arranged at the conveying end of the sulfur forming machine, and a cooling water pump is arranged at the conveying end of the cooling water tank.
Compared with the prior art, the invention has the beneficial effects that:
1. the acid gas and the chemical agent in the absorption oxidation reactor undergo absorption and oxidation reduction reaction, so that hydrogen sulfide and the like in the acid gas are removed, the discharged gas is ensured to meet the requirement of environmental protection standards, and sulfur which has stable performance and is convenient to transport and store is produced, so that the requirements of production process, safety and environmental protection are met.
2. According to the acid gas purifying and sulfur recycling treatment method and the treatment system, different processes are flexibly selected according to the difference of raw material components, namely, the solution circulation amount and the medicament addition amount of the absorption oxidation reactor are flexibly controlled according to the difference of acid gas flow and smoke components, so that the material loss is reduced, and the operation cost is reduced.
Drawings
FIG. 1 is a process flow diagram of an acid gas purification and sulfur recycling treatment system of the present invention;
FIG. 2 is a flow chart of the acid gas treatment process of the invention;
FIG. 3 is a flow chart of the vacuum belt filtration process of the present invention;
FIG. 4 is a flow chart of the liquid sulfur separation and melting process of the present invention;
FIG. 5 is a flow chart of the liquid sulfur recovery and molding packaging process of the invention;
FIG. 6 is a schematic diagram of the overall system installation of the present invention;
FIG. 7 is a simplified installation diagram of a vacuum belt filter device of the present invention;
FIG. 8 is a schematic view of the installation of the liquid sulfur forming and packaging conveyor of the present invention.
In the figure: 1. a first sour gas separation tank; 2. a condensate pump; 201. a second sour gas separation tank; 202. a first solution return pump; 203. a first blower; 204. an absorption oxidizer; 205. a second solution return pump; 206. a factory wind buffer tank; 207. a first solution pump; 209. a temperature-regulating water heat exchanger; 210. a temperature-regulating water pump; 211. a solution heat exchanger; 3. a second blower; 301. a vacuum pump; 302. a first filtrate collection tank; 303. the filtrate returns to the pump; 4. an absorption oxidation reactor; 401. a stirrer; 402. a water supplementing pump; 403. a condensate pump; 404. a second filtrate collection tank; 5. a second solution pump; 501. a cooling water tank; 502. a cooling water pump; 6. a vacuum belt filter; 601. a granulating and forming device; 602. a sulfur melting device; 603. a vacuum filter; 7. a filtrate tank; 8. a filtrate pump; 9. stirring and mixing the pot; 10. a third solution pump; 11. a preheater; 12. a condenser; 13. a steam flash tank; 14. a sulfur separator; 15. a sulfur melting kettle; 16. a sulfur paddle tank; 17. sulfur propeller pump; 18. a sulfur forming machine; 19. a degassing fan; 20. a hoist; 21. a storage bin; 22. a packaging weighing machine; 23. a roller conveyor; 24. a dust remover; 25. and (5) a fan blade.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, in order to solve the technical problem that the emission of the combustion products does not reach the environmental protection standard, the following preferred technical scheme is provided:
the acid gas purifying and sulfur recycling treatment method comprises the following steps:
the acid gas absorption reaction treatment process adopts a liquid phase catalytic oxidation method sulfur recovery technology, the acid gas is purified into a wet method recovery technology, the acid gas from a liquid tank is sent into an absorption oxidation reactor 4 to undergo an absorption and oxidation reduction reaction with chemical agents, hydrogen sulfide in the acid gas is removed, and purified gas is discharged from the top of the absorption oxidation reactor 4;
the vacuum belt filtration process, the removed sulfur and partial solution are sent into a vacuum belt filter 6 from the bottom of an absorption oxidation reactor 4 by a pump, sulfur cakes are formed after filtration, and the sulfur cakes are sent into a stirring and mixing tank 9 to be fully stirred, mixed, diluted and other processes with desalted water;
the liquid sulfur separation and melting process is carried out by pumping solution into the next device, and a series of preheating, heating, separation and other processes are carried out to form molten state liquid sulfur;
the liquid sulfur is subjected to granulation molding, metering, packaging and other processes to complete the recovery, transportation and storage of sulfur.
In this embodiment, the acid gas and the chemical agent in the absorption oxidation reactor 4 undergo absorption and oxidation reduction reactions to remove hydrogen sulfide and the like in the acid gas, ensure that the exhaust gas meets the requirements of environmental protection standards, generate sulfur with stable performance and convenient transportation and storage, so as to meet the requirements of production process and safety and environmental protection, and flexibly select different processes according to the difference of raw material components, namely flexibly control the circulation amount of the solution and the addition amount of the agent in the absorption oxidation reactor 4 according to the difference of the acid gas flow and the smoke component, reduce material loss and reduce operation cost.
Referring to fig. 1-8, in order to solve the technical problem that the equipment and the pipelines will be corroded in the process of treatment, storage and transportation if the acidic components and the impurities are not removed, thereby seriously affecting the safe operation of the device, the following preferred technical scheme is provided:
the utility model provides an acid gas purifies and sulfur resource recovery processing method, including absorbing oxidation reactor 4, one side of absorbing oxidation reactor 4 is provided with first sour gas liquid separation jar 1 and second air-blower 3, the opposite side of absorbing oxidation reactor 4 is provided with second solution pump 5, second air-blower 3 provides the oxidation wind for absorbing oxidation reactor 4, first sour gas liquid separation jar 1 external condensate pump 2, second solution pump 5 is used for receiving absorbing oxidation reactor 4 exhaust solution, the delivery end of second solution pump 5 exhaust sulfur solution is provided with vacuum belt filter 6, vacuum belt filter 6 arranges in high-rise steel structure platform, so that the filter cake can fall into solution thick liquid stirring mixing tank 9 smoothly, steel structure platform is provided with the inclined ladder, safety railing, operating platform and passageway, because the filter works in moist environment, carry in the air corrosive medium, install filtrate tank 7 and liquid pump 8 to device and factory building, filtrate tank 7 is located one side of liquid pump 8, the delivery end of vacuum belt filter 6 is provided with stirring mixing tank 9, the delivery end of vacuum belt filter 10 is provided with preheater vapor separator 11, the delivery end of preheater 11 is provided with the third evaporator 11, the delivery end of preheater 11 is provided with the steam separator 11, the output end of the evaporator 11 is provided with the steam separator 11, the third evaporator 11 is provided with the output end of preheater 11, the output end of the evaporator 11 is provided with the evaporator 11.
In this embodiment, the acid gas from the liquid tank is sent into the absorption oxidation reactor 4 to undergo absorption and oxidation reduction reactions with chemical agents, hydrogen sulfide in the acid gas is removed, purified gas is discharged from the top of the absorption oxidation reactor 4, the absorption chamber in the cylinder at the upper part of the absorption oxidation reactor 4 receives the acid gas from the outside, the hydrogen sulfide in the acid gas is absorbed by the catalyst in the absorption chamber, hydrogen sulfide is removed through oxidation reaction, and a sulfur water mixed solution is formed, the reduced catalyst falls back to the reduction chamber at the outside of the cylinder along with density difference and is reduced and regenerated, the sulfur water mixed solution is settled to the bottom of the tank to generate sulfur slurry solution, in the absorption oxidation reactor 4, in order to prevent the sulfur slurry pump which cannot smoothly flow to the bottom due to the excessive local solution concentration at the bottom of the oxidizer, an air ejector is arranged at the bottom of the absorption oxidation reactor 4, and the phenomenon that the sulfur slurry solution is deposited at the bottom of the absorption oxidation reactor 4 and flows through the channel medium due to the excessive local concentration can be prevented.
The sulfur separator 14 is provided with a sulfur melting kettle 15 at the conveying end, the sulfur oar tank 16 is arranged at the conveying end of the sulfur melting kettle 15, the sulfur oar pump 17 is arranged at the conveying end of the sulfur oar tank 16, the sulfur forming machine 18 is arranged at the conveying end of the sulfur oar pump 17, the degassing fan 19 is arranged on the upper surface of the sulfur forming machine 18, the lifting machine 20 is arranged at one end of the sulfur forming machine 18, the storage bin 21 is arranged at the conveying end of the lifting machine 20, the storage bin 21 is provided with two conveying ends, the packing weighing machine 22 is arranged at one conveying end of the storage bin 21, the dust remover 24 is arranged at the other conveying end of the storage bin 21, the roller conveyor 23 is arranged at the conveying end of the packing weighing machine 22, the fan blade 25 is arranged on the surface of the dust remover 24, the first acid gas component liquid tank 1 is correspondingly provided with the second acid component liquid tank 201, the second acid component liquid tank 201 is provided with two conveying ends, the first solution return pump 202 is arranged at one conveying end of the second acid component liquid tank 201, the other conveying end of the second acid component liquid tank 201 is provided with the absorber 204, one side of the second acid component liquid tank 21 is provided with the absorber 204, one side of the second acid component liquid 205 is provided with the second absorber 204, and the second oxidizing liquid return end of the second acid component 204 is provided with the second absorber 204, and the second oxidizing liquid 204 is arranged at the other conveying end of the second acid component 204 is used for the second oxidizing liquid, and is provided with the second oxidizing liquid absorber 204.
In this embodiment, the removed sulfur and part of the solution are pumped from the bottom of the absorption oxidation reactor 4 into the vacuum belt filter 6, the sulfur cake is formed after filtration, the sulfur cake is sent into the stirring mixing tank 9 and desalted water for full stirring, mixing, dilution and other processes, the solution is pumped into the next device, the molten sulfur is formed through a series of preheating, heating, separating and other processes, the recovery, transportation and storage of the sulfur are completed, a sulfur slurry pump is arranged at the bottom of the absorption oxidation reactor 4, the sulfur water mixed solution formed by removing the hydrogen sulfide in the absorption oxidation reactor 4 is sent into the next stage vacuum belt filter process system, the sulfur water mixed solution from the upstream sulfur slurry pump is dehydrated and filtered by adopting the vacuum belt filter 6, the filtrate after the sulfur solution is filtered by the vacuum belt filter 6 is collected into the filtrate return tank, the filtrate is pumped into the absorption oxidation reactor 4 for recycling, the consumption of the chemical agent for desulfurization is reduced, the sulfur solution is dehydrated to generate water and salt solution containing about 65% and 35% of sulfur after the sulfur is dehydrated by the vacuum belt filter 6, the mixed solution is sent into the stirring tank 9 below the vacuum belt filter, the mixed solution is placed in the stirring mixing tank 9, the mixed solution is fully stirred in the stirring tank, and the mixed solution is stirred in the mixed solution slurry mixing tank is placed at the bottom of the stirring tank 9, and the mixed solution is fully stirred by the vacuum belt filter 9.
The delivery end of the first solution pump 207 is provided with a solution heat exchanger 211, the delivery end of the solution heat exchanger 211 is butted with the absorption oxidizer 204, a temperature-adjusting water pump 210 is installed on one side of the solution heat exchanger 211, the delivery end of the temperature-adjusting water pump 210 is provided with a temperature-adjusting water heat exchanger 209, the delivery end of the temperature-adjusting water heat exchanger 209 is butted with the temperature-adjusting water pump 210, a factory wind buffer tank 206 is installed on one side of the absorption oxidizer 204, the delivery end of the factory wind buffer tank 206 is butted with the absorption oxidizer 204, a vacuum filter 603 is arranged on one side of the absorption oxidizer 4, a sulfur melting device 602 is installed on one side of the vacuum filter 603, a granulating and forming device 601 is arranged on one side of the sulfur melting device 602, a first filtrate collecting tank 302 is arranged on one side of the vacuum belt filter 6, the vacuum pump 301 is communicated with the first filtrate collecting tank 302, the delivery end of the vacuum pump 301 corresponds to the filtrate tank 7, a filtrate return pump 303 is arranged on one side of the filtrate tank 7, and the filtrate return pump 303 is communicated with the filtrate tank 7.
In the embodiment, a filtrate collecting tank is arranged below a vacuum belt filter 6 and is used for collecting filtrate of sulfur solution filtered by a filter, the solution in the filtrate collecting tank is circularly used in an absorption oxidation reactor 4 by a pump arranged at the bottom side position of the filtrate collecting tank so as to reduce consumption of chemical agents for desulfurization, thereby reducing the cost and the cost of equipment operation, the vacuum belt filter 6 is provided with a vacuum pressure difference device, slurry entering the filter realizes the purposes of material filtration and material washing by the vacuum pressure difference, and the water washing amount reaches the technical requirements of materials by adjusting the feeding amount and the filter cloth operation speed, thereby realizing the technical properties of continuous feeding, mother liquor filtration, filter cake dehydration and unloading, the core equipment of a liquid sulfur separation and melting device is a sulfur melting kettle 15 and a liquid sulfur separator, and the mixed solution of molten sulfur and water is subjected to a preheating process, then the molten sulfur enters a sulfur melting kettle 15 to be fully heated, then enters a liquid sulfur separator to be separated, the liquid sulfur separator is provided with a liquid level controller which is linked with an instrument valve on an outlet pipeline of the liquid sulfur separator, molten liquid sulfur is in the liquid sulfur separator and is controlled to enter and exit materials through a liquid level control loop, the liquid sulfur of molten liquid is sent into a liquid sulfur storage container arranged below the liquid sulfur separator in a self-flowing mode, equipment and pipelines of the liquid sulfur separation and melting device are of jacket structures, the good fluidity of liquid sulfur pinched by the liquid sulfur separation and melting device under the viscosity of about 143 ℃ is ensured by a steam tracing mode, so that the transportation of sulfur is realized, the liquid sulfur in the liquid sulfur separation and melting device is formed into the liquid sulfur with the temperature of about 143 ℃ through a series of processes of heating, separation and the like, the liquid sulfur melting device purifies and purifies sulfur solution generated by a desulfurization system to form liquid sulfur with good fluidity, the liquid sulfur in the liquid sulfur separation and melting device enters a sulfur granulating device through a liquid sulfur pump, a rotary belt type condensation granulating device is adopted in the granulating process, the liquid sulfur is uniformly distributed on a steel belt moving at a uniform speed below the device through a special distributing device according to the viscosity range of the sulfur in a molten state by utilizing the characteristic of low melting temperature of the sulfur, and the material is rapidly cooled and solidified in the moving and conveying processes under the forced cooling of a continuous spraying device arranged below the steel belt, so that the purpose of granulating and forming is achieved.
The inside of stirring mix jar 9 is provided with agitator 401, and one side of stirring mix jar 9 is provided with moisturizing pump 402, and moisturizing pump 402 is provided with two delivery ends, and one delivery end of moisturizing pump 402 is docked with stirring mix jar 9, and second filtrate collecting tank 404 is installed to another delivery end of moisturizing pump 402, and the delivery end of second filtrate collecting tank 404 is provided with condensate pump 403, and the delivery end of sulphur make-up machine 18 is provided with cooling water tank 501, and cooling water pump 502 is installed to cooling water tank 501's delivery end.
In the embodiment, the technical key of the rotary belt type condensation granulating device is that the liquid sulfur passes through the drop forming, cooling and the running speed of a steel belt of a distributing device of the granulating machine, so that the sulfur forms hemispherical or flaky sulfur, main core pipelines and equipment between a liquid sulfur storage tank and the liquid sulfur forming machine all adopt jacket structures, low-pressure low-temperature steam is utilized for heat tracing, so that the temperature of the liquid sulfur can be always kept at 143 ℃ to ensure that the liquid sulfur has good viscosity and fluidity, the continuous liquid sulfur from the upstream is quickly and regularly divided into rows of intermittent drop drops by the distributing device of the condensation granulating device, and the drops dropped on the rotary steel belt form hemispherical or flaky uniform particles by the viscosity and surface tension of the liquid material. The particle size of finished product particles can be regulated and controlled in a certain range through the cooperative regulation of the rotating speed of the distributing device and the material flow, meanwhile, cooling water is sprayed on the surface of the steel belt to realize forced cooling, so that the drop-shaped liquid sulfur is quickly condensed, solidified and formed, sulfur particles transfer heat through a thin steel belt, the contact with the cooling water is completely avoided, the moisture content of solid sulfur particles is reliably ensured, the rotating steel belt of the condensing and granulating device is provided with a reversing bending part and a cleaning soft brush at the discharging end, the bonding surface of the solidified sulfur particles and the steel belt is easy to peel, the particle shape is protected, the improvement of the operation condition and the environment in the production and use processes is facilitated, the condensing and granulating device can quickly and effectively convert the liquid sulfur into solid state, and meets the requirements of production process and safety and environmental protection, the sulfur molding adopts a granulating method to convert liquid sulfur into solid state so as to obtain finished product particles which are regular in shape, uniform in granularity and stable in performance, and are favorable for transportation, storage and use, the flaky sulfur generated by the condensing granulating device freely falls into a bucket elevator through the rotation of a steel belt, the elevator runs through an electric mechanism to send the solid sulfur particles into a storage bin 21, the core process device of the packing weighing process is a semi-automatic or full-automatic weighing packaging machine, flaky sulfur in a bin 21 enters a buffering bin of packing weighing in a free blanking mode, is loaded into a woven bag after being weighed, and is then conveyed to a designated position through a roller conveyor 23, and the sulfur bin 21 and the packing weighing are provided with auxiliary dust removing devices, induced draft fans and other devices, so that dust generated in the production process is filtered and collected.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should be covered by the protection scope of the present invention by making equivalents and modifications to the technical solution and the inventive concept thereof.
Claims (10)
1. The acid gas purifying and sulfur recycling treatment method is characterized by comprising the following steps of:
the acid gas absorption reaction treatment process adopts a liquid phase catalytic oxidation method sulfur recovery technology, the acid gas is purified into a wet method recovery process, the acid gas from a liquid tank is sent into an absorption oxidation reactor to undergo an absorption and oxidation reduction reaction with a chemical agent, hydrogen sulfide in the acid gas is removed, and the purified gas is discharged from the top of the absorption oxidation reactor;
the method comprises the steps of (1) a vacuum belt type filtering process, pumping the removed sulfur and part of solution from the bottom of an absorption oxidation reactor into a vacuum belt type filter, filtering to form a sulfur cake, and sending the sulfur cake into a stirring and mixing tank to be fully stirred, mixed, diluted and the like with desalted water;
the liquid sulfur separation and melting process is carried out by pumping solution into the next device, and a series of preheating, heating, separation and other processes are carried out to form molten state liquid sulfur;
the liquid sulfur is subjected to granulation molding, metering, packaging and other processes to complete the recovery, transportation and storage of sulfur.
2. An acid gas purification and sulfur recycling treatment system comprises an absorption oxidation reactor (4), and is characterized in that: one side of the absorption oxidation reactor (4) is provided with a first acid gas liquid separating tank (1) and a second air blower (3), the other side of the absorption oxidation reactor (4) is provided with a second solution pump (5), the second air blower (3) provides oxidation wind for the absorption oxidation reactor (4), the first acid gas liquid separating tank (1) is externally connected with a condensate pump (2), and the second solution pump (5) is used for receiving solution discharged by the absorption oxidation reactor (4).
3. The acid gas purification and sulfur resource recovery processing system as recited in claim 2, wherein: the conveying end of second solution pump (5) exhaust sulfur solution is provided with vacuum belt filter (6), filtrate case (7) and filtrate pump (8) are installed to the lower extreme of vacuum belt filter (6), filtrate case (7) are located one side of filtrate pump (8), the conveying end of vacuum belt filter (6) is provided with stirring mixing tank (9), third solution pump (10) are installed to the conveying end of stirring mixing tank (9), the output of third solution pump (10) is provided with pre-heater (11), pre-heater (11) are provided with two conveying ends, condenser (12) are installed to one output of pre-heater (11), the conveying end of condenser (12) is provided with steam flash tank (13), sulfur separator (14) are installed to the other output of pre-heater (11), sulfur separator (14) are pre-heater (11) and send back hot water, sulfur separator (14) are steam flash tank (13) and send back steam.
4. The acid gas purification and sulfur resource recovery processing system as recited in claim 3, wherein: the conveying end of sulfur separator (14) is provided with sulfur melting cauldron (15), sulfur oar jar (16) is installed to the conveying end of sulfur melting cauldron (15), the conveying end of sulfur oar jar (16) is provided with sulfur oar pump (17), sulfur make-up machine (18) is installed to the conveying end of sulfur oar pump (17), the upper surface of sulfur make-up machine (18) is provided with degassing fan (19), lifting machine (20) are installed to the one end of sulfur make-up machine (18), the conveying end of lifting machine (20) is provided with feed bin (21), feed bin (21) are provided with two conveying ends, packing weighing machine (22) are installed to one conveying end of feed bin (21), the other conveying end of feed bin (21) is provided with dust remover (24), roller conveyer (23) are installed to the conveying end of packing weighing machine (22), surface mounting of dust remover (24) has fan blade (25).
5. The acid gas purification and sulfur resource recovery processing system as recited in claim 2, wherein: the first acid gas separation liquid tank (1) is correspondingly provided with a second acid gas separation liquid tank (201), the second acid gas separation liquid tank (201) is provided with two conveying ends, one conveying end of the second acid gas separation liquid tank (201) is provided with a first solution return pump (202), the other conveying end of the second acid gas separation liquid tank (201) is provided with an absorption oxidizer (204), one side of the second acid gas separation liquid tank (201) is provided with a first blower (203), the absorption oxidizer (204) is provided with two conveying ends, one conveying end of the absorption oxidizer (204) is provided with a second solution return pump (205), the second solution return pump (205) is used for returning sulfur slurry solution to the inside of the absorption oxidizer (204), and the other conveying end of the absorption oxidizer (204) is provided with a first solution pump (207).
6. The acid gas purification and sulfur resource recovery processing system as recited in claim 5, wherein: the conveying end of the first solution pump (207) is provided with a solution heat exchanger (211), the conveying end of the solution heat exchanger (211) is in butt joint with the absorption oxidizer (204), a temperature-adjusting water pump (210) is installed on one side of the solution heat exchanger (211), the conveying end of the temperature-adjusting water pump (210) is provided with a temperature-adjusting water heat exchanger (209), the conveying end of the temperature-adjusting water heat exchanger (209) is in butt joint with the temperature-adjusting water pump (210), a factory wind buffer tank (206) is installed on one side of the absorption oxidizer (204), and the conveying end of the factory wind buffer tank (206) is in butt joint with the absorption oxidizer (204).
7. The acid gas purification and sulfur resource recovery processing system as recited in claim 2, wherein: one side of the absorption oxidation reactor (4) is provided with a vacuum filter (603), one side of the vacuum filter (603) is provided with a sulfur melting device (602), and one side of the sulfur melting device (602) is provided with a granulating and forming device (601).
8. The acid gas purification and sulfur resource recovery processing system as recited in claim 3, wherein: the conveying end of vacuum belt filter (6) is provided with first filtrate collecting tank (302), and vacuum pump (301) is installed to one side of first filtrate collecting tank (302), and vacuum pump (301) are linked together with first filtrate collecting tank (302), and the conveying end of vacuum pump (301) corresponds with filtrate case (7), and one side of filtrate case (7) is provided with filtrate return pump (303), and filtrate return pump (303) are linked together with filtrate case (7).
9. The acid gas purification and sulfur resource recovery processing system as recited in claim 3, wherein: the inside of stirring blending tank (9) is provided with agitator (401), and one side of stirring blending tank (9) is provided with moisturizing pump (402), and moisturizing pump (402) are provided with two conveying ends, and one conveying end of moisturizing pump (402) is docked with stirring blending tank (9), and second filtrate collecting tank (404) is installed to another conveying end of moisturizing pump (402), and the conveying end of second filtrate collecting tank (404) is provided with condensate pump (403).
10. The acid gas purification and sulfur resource recovery processing system as recited in claim 4, wherein: the conveying end of the sulfur forming machine (18) is provided with a cooling water tank (501), and the conveying end of the cooling water tank (501) is provided with a cooling water pump (502).
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