CN109569290A - Tail gas of sulphur discharge process technique and device - Google Patents

Tail gas of sulphur discharge process technique and device Download PDF

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Publication number
CN109569290A
CN109569290A CN201811633205.8A CN201811633205A CN109569290A CN 109569290 A CN109569290 A CN 109569290A CN 201811633205 A CN201811633205 A CN 201811633205A CN 109569290 A CN109569290 A CN 109569290A
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sulphur
tail gas
gas
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furnace
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CN109569290B (en
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王宏滔
邢晓鹏
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Shandong Qi Chuang Petrochemical Engineering Co Ltd
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Shandong Qi Chuang Petrochemical Engineering Co Ltd
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    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/20746—Cobalt
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/20769—Molybdenum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2206/00—Waste heat recuperation
    • F23G2206/20—Waste heat recuperation using the heat in association with another installation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2209/00—Specific waste
    • F23G2209/14—Gaseous waste or fumes

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  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
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  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Treating Waste Gases (AREA)

Abstract

The invention belongs to Petroleum Processing Technology fields, and in particular to a kind of tail gas of sulphur discharge process technique and device.Sour gas enters progress claus reaction in sulphur furnace processed and is converted into elemental sulfur, enters back into two-stage reactor Recovered sulphur；Sulphur tail gas processed enters hydrogenator, is generated as H2S, the discharged in burning after absorbing；Sulphur tail gas processed removes tail gas burning furnace bypass connection water sealed tank, and under water sealed tank water seal effect, after bypass valve has valves leakage situation, can preventing the gas of valves leakage, in line that exhaust emissions is in turn resulted in into tail gas burning furnace is exceeded.The present invention solve the problems, such as trap after, leak into interlocking in bypass valve before tail gas treating unit, prevent gas leakage；The vulcanization hydrogen amount being lowered into tail gas burning furnace；The hydrogen sulfide for avoiding the degassing of molten sulfur pond from generating directly into burning in tail gas burning furnace, reduces sulfur dioxide concentration in tail gas of sulphur, stablizes sulfur dioxide (SO2) emissions in 50mg/m3Below；The present invention also provides tail gas of sulphur discharging processing devices.

Description

Tail gas of sulphur discharge process technique and device
Technical field
The invention belongs to Petroleum Processing Technology fields, and in particular to a kind of tail gas of sulphur discharge process technique and device.
Background technique
The hydrogen sulfide tail gas of petrochemical industry refinery processing at present mostly uses two kinds of process routes of sulphur recovery and NaHS, and sulphur returns Receiving process stabilizing, treating capacity becomes mainstream greatly, in technical process without the generation such as waste water.Increasingly with Environmental Protection in China pressure Greatly, harsh year by year (sulfur dioxide (SO2) emissions are by earliest 960mg/m for sulfur recovery tail gas exhaust index3It has been upgraded at present 100mg/m3), being likely to according to policy message in two years will whole nation implementation 50mg/m3Discharge standard.Therefore sulphur recovery tail It is increasing that gas discharges pressure, and having become sulphur unit can smoothly go into operation the deciding factor of operation.
Tail gas of sulphur processing method also there are many, be broadly divided into two major classes, first is that before incinerator feeder apparatus handle H2S , iron process, direct oxidation process, super purification process (such as SCOT) is such as complexed；Second is that being flue gas after incinerator into cigarette Increase treatment facility before chimney, mainly handles SO2, such as Kang Suofu technique, flue gas alkali washing process etc..Most of the country sulphur at present Sulphur device use SCOT technique, technology maturation, it is self-contained, without subsequent contamination object.
The tail gas of sulphur of hydrogenated reduction contains a large amount of H2S and impurity, after needing first amine is de- incinerator, old tail gas is sent to burn again SO2Discharge index 960mg/m3, current major part control≤400mg/m3.New emission standard was implemented in full on July 1st, 2017, Middle petroleum, middle petrochemical industry, CNOOC mostly use greatly tighter discharge standard: SO2≤100mg/m3。
Because operating pressure is close to normal pressure, and contain a large amount of CO2, tail gas of sulphur become refinery gas be most difficult to processing medium.Traditional Scott technique reaches 100mg/m3Discharge index, amine take off after-purification gas H2S content wants≤20mg/Nm3(control raw material COS content Premised on)；Poor amine purification degree requires 0.1g/l, and power of regeneration almost increases by 10 times, energy consumption is caused to increase considerably, and cannot Guarantee the reliability of operation.
Summary of the invention
In view of the deficiencies of the prior art, it the object of the present invention is to provide a kind of tail gas of sulphur discharge process technique, solves to catch Problem is leaked after storage, into interlocking in bypass valve before tail gas treating unit, prevents gas leakage；It is lowered into tail gas burning furnace Vulcanization hydrogen amount；The hydrogen sulfide for avoiding the degassing of molten sulfur pond from generating directly into burning in tail gas burning furnace, reduces by two in tail gas of sulphur Sulfur oxide concentration stablizes sulfur dioxide (SO2) emissions in 100mg/m3Below；The present invention also provides a kind of tail gas of sulphur emission treatments Device.
Tail gas of sulphur discharge process technique of the present invention, comprising the following steps:
Sour gas enters in sulphur furnace processed, divides H in sulphur furnace interior processed2S carries out claus reaction, and most of gas is converted to gas State elemental sulfur, gaseous elemental sulphur is cooling through the first exhaust-heat absorption boiler, then cooling, the liquid condensed out through level-one sulfur condenser Sulphur is separated with Process Gas, and from bottom, outflow enters sulphur sealed cans, and it is anti-that Process Gas enters level-one after the heating of level-one steam heater Device is answered, under the effect of the catalyst, the H in Process Gas2S and SO2It is converted into gaseous elemental sulphur, the gas after reaction enters second level Sulfur condenser is cooling, and Molten sulphur is separated with Process Gas, and the Molten sulphur condensed out enters sulphur sealed cans, and Process Gas passes through two again Enter second reactor, under the effect of the catalyst, the H in Process Gas after grade steam heater heating2S and SO2Sulphur is converted into, Cooling into three-level sulfur condenser, the Molten sulphur condensed out enters sulphur sealed cans；
After trap, tail gas enters three-level steam heater by exhaust pipe and heats the sulphur tail gas processed that top comes out, Enter back into hydrogenator, elemental sulfur, sulfur dioxide are hydrogenated under the effect of the catalyst, in tail gas is reduced into for tail gas and hydrogen For H2S, COS and CS2It is hydrolyzed to be converted to H2S, obtain plus hydrogen tail gas is tentatively cooling through steam generator, enters back into chilling tower Cooling is directly contacted with chilled water (chw), the tail gas after chilling cooling comes out from tower top enters tail gas absorber, tail gas absorption column overhead Purified gas out enters tail gas burning furnace burning by absorption tower tower top pipe, and high-temperature flue gas, which is first overheated through steam superheater, to be steamed Vapour, then saturated vapor occurs through the second waste heat boiler waste heat, it is discharged after flue-gas temperature cooling by chimney；
Exhaust pipe be equipped with stop valve, between exhaust pipe and absorption tower tower top pipe be equipped with water sealed tank, trap and Exhaust pipe between stop valve is equipped with the first bypass, and the first bypass is equipped with bypass valve, and the port of the first bypass is located at water Water seal liquid level in sealed cans is hereinafter, connect absorption tower tower top pipe by the second bypass on the wall of water sealed tank side；When adding hydrogen anti- When device being answered to break down, stop valve is closed, opens bypass valve, tail gas is directly entered tail gas burning furnace burning disposal；Normal production In the case of, bypass valve is in close state, and stop valve is in the open state, when bypass valve has gas leakage, in water sealed tank water Under envelope effect, the gas of leakage is prevented to be discharged in air.
When hydrogenator breaks down, needs to close to the stop valve of hydrogenator, open bypass valve, tail gas is straight It taps into tail gas burning furnace burning disposal；Under normal production scenarios, until the cutting-off valve of hydrogenator is in the open state, until The stop valve of tail gas burning furnace is in close state, due to impurity more (catalyst fines, lining powder in tail gas of sulphur pipeline And the hybrid solid of other claus reaction by-products), exhaust system valve more there is valve to fit badly, valves leakage the case where Occur, under system pressure, tail gas can not be directly entered tail gas burning furnace after hydrogenated vent gas treatment and burn after leakage in bypass valve It burns into and influences chimney exhaust emissions, the generation of such case can be effectively prevented by increasing water sealed tank newly in the present invention；Work as simultaneously When hydrogenation system failure, it will not influence the tail gas in line technique into tail gas burning furnace of meeting an urgent need and require (sulphur system pressure processed i.e. water Pressure is greater than water seal pressure before sealing).
The pressure of sulphur furnace processed is controlled in 10-15Kpa.It can see according to claus reaction chemical balance formula, pressure rise Can promote positive reaction carries out i.e. sulfur recovery rate height；But pressure again cannot be too high, the too high pressure that will affect stokehold sour gas Power and then the operation for influencing regenerative system and stripping system.The pressure of sulphur furnace processed is controlled in 10-15Kpa, both can guarantee higher Sulfur recovery rate, and can guarantee certain operating flexibility, it is unlikely to that tail gas is made easily to break through water seal, and do not have water sealed tank There should be effect.
Catalyst in hydrogenator is cobalt/molybdenum hydrogenation catalyst, and cobalt/molybdenum hydrogenation catalyst is conventional commercial product, Hydrogenation catalyst effect is good.By taking MDEA as an example, reaction is as follows in hydrogenator:
SO2+3H2→H2S+2H2O
S+H2→H2S
COS+H2O→H2S+CO2
CS2+2H2O→2H2S+CO2
Above-mentioned reaction is reversible reaction, and when low temperature (45 DEG C of <) carries out to the right, and when high temperature (105 DEG C of >) carries out to the left.
Add H in hydrogen tail gas2S and CO2It is sent to solvent reclamation device after being desulfurized solvent absorption, it is de- in regenerator heating stripping H out2S and CO2, return to Claus system；Lean solution returns to tail gas absorber and is recycled；Purified tail gas, will using heat burning Remaining trace sulfide converts SO2, by smoke stack emission to atmosphere.
Mainly there is following source in the source of sulfur dioxide in prior art sulphur chimney: (1) (into tail gas after trap Before processing unit) bypass is interlocked, valves leakage causes partial tail gas to recycle without tail gas treating unit and be directly entered tail gas and burn It burns furnace and burns generation；(2) absorption tower fails the hydrogen sulfide fully absorbed in tail gas treating unit, is emitted into tail gas burning furnace and burns It burns and generates sulfur dioxide；(3) hydrogen sulfide that the degassing of molten sulfur pond generates burns generation in tail gas burning furnace.
For above-mentioned source, the solution that the present invention uses is as follows:
Firstly, exhaust pipe is equipped with stop valve, water sealed tank, trapping are equipped between exhaust pipe and absorption tower tower top pipe Exhaust pipe between device and stop valve is equipped with the first bypass, and the first bypass is equipped with bypass valve, the port position of the first bypass In the water seal liquid level in water sealed tank hereinafter, connecting absorption tower tower top pipe by the second bypass on the wall of water sealed tank side.
When hydrogenator breaks down, needs to close to the stop valve of hydrogenator, open bypass valve, tail gas is straight It taps into tail gas burning furnace burning disposal；Under normal production scenarios, until the cutting-off valve of hydrogenator is in the open state, until The stop valve of tail gas burning furnace is in close state, due to impurity more (catalyst fines, lining powder in tail gas of sulphur pipeline And the hybrid solid of other claus reaction by-products), exhaust system valve more there is valve to fit badly, valves leakage the case where Occur, under system pressure, tail gas can not be directly entered tail gas burning furnace after hydrogenated vent gas treatment and burn after leakage in bypass valve It burns into and influences chimney exhaust emissions, the generation of such case can be effectively prevented by increasing water sealed tank newly in the present invention；Work as simultaneously When hydrogenation system failure, it will not influence the tail gas in line technique into tail gas burning furnace of meeting an urgent need and require (sulphur system pressure processed i.e. water Pressure is greater than water seal pressure before sealing).
Water sealed tank is arranged in the present invention, and the water seal liquid level in water sealed tank is 2000-5000mm, this partial tail gas is in water seal Under tank water seal effect, tail gas burning furnace burning will not be entered, sulfur dioxide concentration in tail gas of sulphur is reduced.
Secondly, the desulfurizing agent in absorption tower uses the preferable efficient desulfurizing agent of quality, preferably Tao Shi desulfurizing agent；Reduce amine Liquid absorbs temperature (preferably cooling using chilled water)；Improve amine liquid recycle stream amount.Sulphur as far as possible after guarantee plus hydrogen in tail gas Change hydrogen to be completely absorbed, the vulcanization hydrogen amount being lowered into tail gas burning furnace.
Third, the molten sulfur in sulphur sealed cans enter molten sulfur pond, and injector is arranged at the top in molten sulfur pond, acts in injector Under, the gaseous sulfur of gasification respectively enters further reacts in sulphur furnace processed, first-stage reactor, second reactor and hydrogenator, It is recycled as sour gas.The hydrogen sulfide for avoiding the degassing of molten sulfur pond from generating directly into burning in tail gas burning furnace, reduces sulphur Sulfur dioxide in tail gas concentration.
After the present invention is improved using three above measure, the sulfur dioxide of the 60-75% in tail gas of sulphur can be reduced.
The tail gas of sulphur discharging processing device that tail gas of sulphur discharge process technique of the present invention uses, including sulphur processed Furnace, sulphur furnace processed are equipped with sour gas inlet pipe and air inlet lines, and sulphur outlet of still processed connects the first waste heat boiler, and the first waste heat boiler goes out Mouth is sequentially connected level-one sulfur condenser, level-one steam heater, first-stage reactor, second level sulfur condenser, second level by pipeline and steams Vapour heater, second reactor, three-level sulfur condenser and trap, trap connect three-level steam by exhaust pipe and heat Device, three-level steam heater outlet connection hydrogenator, level-one sulfur condenser, second level sulfur condenser and three-level sulfur condenser Bottom connects sulphur sealed cans by pipeline, is additionally provided with hydrogen inlet pipe on hydrogenator, the outlet of third-stage reactor passes through pipeline Steam generator is connected, steam generator outlet connects the import of chilling tower bottom, and the outlet of chilling top of tower is connected by pipeline inhales Tower bottom import is received, absorption tower top exit connects tail gas burning furnace import by absorption tower tower top pipe, and tail gas burning furnace goes out Mouth connection steam superheater import, steam superheater outlet the second waste heat boiler import of connection, the second heat boiler outlet pass through Pipeline connects chimney；Exhaust pipe is equipped with stop valve, and water sealed tank, trapping are equipped between exhaust pipe and absorption tower tower top pipe Exhaust pipe between device and stop valve is equipped with the first bypass, and the first bypass is equipped with bypass valve, the port position of the first bypass In the water seal liquid level in water sealed tank hereinafter, connecting absorption tower tower top pipe by the second bypass on the wall of water sealed tank side.
Molten sulfur pond is arranged in sulphur sealed cans side, injector is arranged at the top in molten sulfur pond, the outlet of injector passes through pipe respectively Road connects sulphur furnace, first-stage reactor, second reactor and hydrogenator processed.
The outlet at bottom of chilling tower connects stripper plant by pipeline；The outlet at bottom connection rich solution regeneration dress on absorption tower It sets.
The steam (vapor) outlet of steam generator is separately connected level-one steam heater, second steam heater, three-level steam and adds Hot device；The steam (vapor) outlet of steam superheater is separately connected level-one steam heater, second steam heater, the heating of three-level steam The steam obtained after recovery waste heat in device, steam generator and steam superheater adds as level-one steam heater, second steam The heat source of hot device, three-level steam heater recycles.
In conclusion the invention has the following advantages that
(1) it is leaked after the present invention solves the problems, such as trap, into interlocking in bypass valve before tail gas treating unit, in water sealed tank Under water seal effect, certain pressure is generated, gas leakage is prevented.
(2) plus the hydrogen sulfide after hydrogen in tail gas is completely absorbed substantially, the vulcanization hydrogen amount being lowered into tail gas burning furnace.
(3) molten sulfur in sulphur sealed cans enters molten sulfur pond, and injector is arranged at the top in molten sulfur pond, under injector effect, The gaseous sulfur of gasification respectively enters further reacts in sulphur furnace processed, first-stage reactor, second reactor and hydrogenator, regards Sour gas recycles, and the hydrogen sulfide for avoiding the degassing of molten sulfur pond from generating directly into burning in tail gas burning furnace, reduces tail gas of sulphur Middle sulfur dioxide concentration.
(4) tail gas of sulphur discharge process technique of the present invention is used, sulfur dioxide (SO2) emissions are stablized in 50mg/m3With Under.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of tail gas of sulphur discharging processing device of the present invention；
In figure: 1- sour gas inlet pipe, 2- air inlet lines, 3- sulphur furnace, the first waste heat boiler of 4-, 5- level-one sulfur condenser, 6- level-one steam heater, 7- first-stage reactor, 8- second level sulfur condenser, 9- second steam heater, 10- second reactor, 11- three-level sulfur condenser, 12- trap, 13- sulphur sealed cans, 14- injector, 15- molten sulfur pond, 16- stop valve, 17- offgas duct Road, 18- three-level steam heater, 19- hydrogenator, 20- steam generator, 21- chilling tower, 22- bypass valve, 23- first Bypass, 24- water sealed tank, 25- second are bypassed, the absorption tower 26-, the absorption tower 27- tower top pipe, 28- tail gas burning furnace, 29- steam Superheater, the second waste heat boiler of 30-, 31- chimney.
Specific embodiment
Below with reference to embodiment, the present invention will be further described.
Embodiment
A kind of tail gas of sulphur discharge process technique, it is characterised in that: the following steps are included:
Sour gas enters in sulphur furnace processed, divides H in sulphur furnace interior processed2S carries out claus reaction, and most of gas is converted to gas State elemental sulfur, the pressure control of sulphur furnace processed is in 12Kpa, and gaseous elemental sulphur is cooling through the first exhaust-heat absorption boiler, then through level-one sulphur Condenser is cooling, and the Molten sulphur condensed out is separated with Process Gas, and from bottom, outflow enters sulphur sealed cans, and Process Gas is steamed through level-one Enter first-stage reactor, under the effect of the catalyst, the H in Process Gas after the heating of vapour heater2S and SO2It is converted into gaseous elemental Sulphur, the gas after reaction enter that second level sulfur condenser is cooling, and Molten sulphur is separated with Process Gas, the Molten sulphur condensed out into Enter sulphur sealed cans, Process Gas enters second reactor, under the effect of the catalyst, process after passing through the heating of second steam heater again H in gas2S and SO2It is converted into sulphur, cooling into three-level sulfur condenser, the Molten sulphur condensed out enters sulphur sealed cans；
After trap, tail gas enters three-level steam heater by exhaust pipe and heats the sulphur tail gas processed that top comes out, Enter back into hydrogenator, elemental sulfur, sulfur dioxide are hydrogenated under the effect of the catalyst, in tail gas is reduced into for tail gas and hydrogen For H2S, COS and CS2It is hydrolyzed to be converted to H2S, obtain plus hydrogen tail gas is tentatively cooling through steam generator, enters back into chilling tower Cooling is directly contacted with chilled water (chw), the tail gas after chilling cooling comes out from tower top enters tail gas absorber, tail gas absorption column overhead Purified gas out enters tail gas burning furnace burning by absorption tower tower top pipe, and high-temperature flue gas, which is first overheated through steam superheater, to be steamed Vapour, then saturated vapor occurs through the second waste heat boiler waste heat, it is discharged after flue-gas temperature cooling by chimney；
Exhaust pipe be equipped with stop valve, between exhaust pipe and absorption tower tower top pipe be equipped with water sealed tank, trap and Exhaust pipe between stop valve is equipped with the first bypass, and the first bypass is equipped with bypass valve, and the port of the first bypass is located at water Water seal liquid level in sealed cans is hereinafter, connect absorption tower tower top pipe by the second bypass on the wall of water sealed tank side；When adding hydrogen anti- When device being answered to break down, stop valve is closed, opens bypass valve, tail gas is directly entered tail gas burning furnace burning disposal；Normal production In the case of, bypass valve is in close state, and stop valve is in the open state, when bypass valve has gas leakage, in water sealed tank water Under envelope effect, the gas of leakage is prevented to be discharged in air.
Water seal liquid level in water sealed tank is 5000mm.
Desulfurizing agent in absorption tower is Tao Shi desulfurizing agent；Catalyst in hydrogenator is cobalt/molybdenum hydrogenation catalyst.
Molten sulfur in sulphur sealed cans enters molten sulfur pond, and injector is arranged at the top in molten sulfur pond, under injector effect, gasification Gaseous sulfur respectively enter and further reacted in sulphur furnace processed, first-stage reactor, second reactor and hydrogenator.
The tail gas of sulphur discharging processing device that the technique uses, including sulphur furnace 3 processed, sulphur furnace 3 processed are equipped with sour gas inlet pipe 1 With air inlet lines 2, first waste heat boiler 4 of the outlet of sulphur furnace 3 connection processed, the outlet of the first waste heat boiler 4 is sequentially connected one by pipeline Grade sulfur condenser 5, level-one steam heater 6, first-stage reactor 7, second level sulfur condenser 8, second steam heater 9, second level are anti- Answer device 10, three-level sulfur condenser 11 and trap 12, trap 12 connects three-level steam heater 18 by exhaust pipe 17, and three Grade steam heater 18 outlet connection hydrogenator 19, level-one sulfur condenser 5, second level sulfur condenser 8 and three-level sulfur condenser 11 bottom connects sulphur sealed cans 13 by pipeline, and the outlet of hydrogenator 19 connects steam generator 20 by pipeline, steams Vapour generator 20 outlet connection 21 bottom inlet of chilling tower, 21 top exit of chilling tower by pipeline connection 26 bottom of absorption tower into Mouthful, 26 top exit of absorption tower connects 28 import of tail gas burning furnace by absorption tower tower top pipe 27, and tail gas burning furnace 28 exports 29 import of steam superheater, the outlet of steam superheater 29 connection 30 import of the second waste heat boiler are connected, the second waste heat boiler 30 goes out Mouth passes through pipeline and connects chimney 31；Exhaust pipe 17 is equipped with stop valve 16, exhaust pipe 17 and absorption tower tower top pipe 27 it Between be equipped with water sealed tank 24, exhaust pipe 17 between trap 12 and stop valve 16 is equipped with the first bypass 23, the first bypass 23 Be equipped with bypass valve 22, first bypass 23 port be located at the water seal liquid level in water sealed tank 24 hereinafter, 24 side of water sealed tank wall It is upper to pass through 25 connection absorption tower tower top pipe 27 of the second bypass.
Molten sulfur pond 15 is arranged in 13 side of sulphur sealed cans, and injector 14, the outlet of injector 14 is arranged at the top in molten sulfur pond 15 Sulphur furnace 3, first-stage reactor 7, second reactor 10 and hydrogenator 19 processed are connected by pipeline respectively.
The outlet at bottom of chilling tower 21 connects stripper plant by pipeline；The outlet at bottom connection rich solution regeneration on absorption tower 26 Device.
The steam (vapor) outlet of steam generator 20 is separately connected level-one steam heater 6, second steam heater 9, three-level and steams Vapour heater 18；The steam (vapor) outlet of steam superheater 29 is separately connected level-one steam heater 6, second steam heater 9, three-level Steam heater 18.
Using the tail gas of sulphur discharge process technique and device, after running a period of time, through detecting, sulfur dioxide (SO2) emissions are 20mg/m3。
Embodiment 2
The tail gas of sulphur discharge process technique and device of use are same as Example 1, and difference is the pressure control of sulphur furnace processed Making the water seal liquid level in 15Kpa, water sealed tank is 4000mm.After running a period of time, through detecting, sulfur dioxide (SO2) emissions are 30mg/m3。
Embodiment 3
The tail gas of sulphur discharge process technique and device of use are same as Example 1, and difference is the pressure control of sulphur furnace processed Making the water seal liquid level in 12Kpa, water sealed tank is 2000mm, and the desulfurizing agent in absorption tower is domestic common desulphurization agent.Fortune After row a period of time, through detecting, sulfur dioxide (SO2) emissions 46mg/m3。
Comparative example
It is straight without the hydrogen sulfide of water sealed tank and the degassing generation of molten sulfur pond before improving the technique and device in actual production It taps into tail gas burning furnace and burns.Sulfur dioxide (SO2) emissions are 120-200mg/m3。

Claims (10)

1. a kind of tail gas of sulphur discharge process technique, it is characterised in that: the following steps are included:
Sour gas enters in sulphur furnace processed, divides H in sulphur furnace interior processed2S carries out claus reaction, and most of gas is converted to gaseous state list Matter sulphur, gaseous elemental sulphur is cooling through the first exhaust-heat absorption boiler, then cooling, the Molten sulphur condensed out through level-one sulfur condenser It is separated with Process Gas, from bottom, outflow enters sulphur sealed cans, and Process Gas enters first-stage reactor after the heating of level-one steam heater, Under the effect of the catalyst, the H in Process Gas2S and SO2It is converted into gaseous elemental sulphur, the gas after reaction enters the condensation of second level sulphur Device is cooling, and Molten sulphur is separated with Process Gas, and the Molten sulphur condensed out enters sulphur sealed cans, and Process Gas passes through second steam again Enter second reactor, under the effect of the catalyst, the H in Process Gas after heater heating2S and SO2It is converted into sulphur, into three Grade sulfur condenser is cooling, and the Molten sulphur condensed out enters sulphur sealed cans；
After trap, tail gas enters three-level steam heater by exhaust pipe and heats the sulphur tail gas processed that top comes out, then into Enter hydrogenator, under the effect of the catalyst, elemental sulfur in tail gas, sulfur dioxide is hydrogenated reduction becomes for tail gas and hydrogen H2S, COS and CS2It is hydrolyzed to be converted to H2S, obtain plus hydrogen tail gas is tentatively cooling through steam generator, enter back into chilling tower with Chilled water (chw) directly contacts cooling, and the tail gas after chilling cooling comes out from tower top enters tail gas absorber, and tail gas absorption column overhead goes out The purified gas come enters tail gas burning furnace burning by absorption tower tower top pipe, high-temperature flue gas first through steam superheater superheated steam, Saturated vapor occurs through the second waste heat boiler waste heat again, is discharged after flue-gas temperature cooling by chimney；
Exhaust pipe is equipped with stop valve, and water sealed tank, trap and cutting are equipped between exhaust pipe and absorption tower tower top pipe Exhaust pipe between valve is equipped with the first bypass, and the first bypass is equipped with bypass valve, and the port of the first bypass is located at water sealed tank Interior water seal liquid level is hereinafter, connect absorption tower tower top pipe by the second bypass on the wall of water sealed tank side；Work as hydrogenator When failure, stop valve is closed, opens bypass valve, tail gas is directly entered tail gas burning furnace burning disposal；Normal production scenarios Under, bypass valve is in close state, and stop valve is in the open state, when bypass valve has gas leakage, is made in water sealed tank water seal Under, the gas of leakage is prevented to be discharged in air.
2. tail gas of sulphur discharge process technique according to claim 1, it is characterised in that: the pressure control of sulphur furnace processed exists 10-15Kpa。
3. tail gas of sulphur discharge process technique according to claim 1, it is characterised in that: the water seal liquid level in water sealed tank is high Degree is 2000-5000mm.
4. tail gas of sulphur discharge process technique according to claim 1, it is characterised in that: the desulfurizing agent in absorption tower is pottery Family name's desulfurizing agent.
5. tail gas of sulphur discharge process technique according to claim 1, it is characterised in that: the catalyst in hydrogenator For cobalt/molybdenum hydrogenation catalyst.
6. tail gas of sulphur discharge process technique according to claim 1, it is characterised in that: the molten sulfur in sulphur sealed cans enters liquid Injector is arranged at the top in molten sulfur pond in sulphur pond, and under injector effect, the gaseous sulfur of gasification respectively enters sulphur furnace processed, level-one It is further reacted in reactor, second reactor and hydrogenator.
7. a kind of tail gas of sulphur discharging processing device, including sulphur furnace processed (3), it is characterised in that: sulphur furnace (3) processed is equipped with sour gas Inlet pipe (1) and air inlet lines (2), sulphur furnace (3) outlet connection the first waste heat boiler (4) processed, the first waste heat boiler (4) outlet pass through Pipeline be sequentially connected level-one sulfur condenser (5), level-one steam heater (6), first-stage reactor (7), second level sulfur condenser (8), Second steam heater (9), second reactor (10), three-level sulfur condenser (11) and trap (12), trap (12) pass through Exhaust pipe (17) connects three-level steam heater (18), three-level steam heater (18) outlet connection hydrogenator (19), Level-one sulfur condenser (5), second level sulfur condenser (8) pass through pipeline with the bottom of three-level sulfur condenser (11) and connect sulphur sealed cans (13), the outlet of hydrogenator (19) connects steam generator (20) by pipeline, and steam generator (20) outlet connection is anxious Cold tower (21) bottom inlet, chilling tower (21) top exit connect absorption tower (26) bottom inlet, absorption tower (26) by pipeline Top exit connects tail gas burning furnace (28) import by absorption tower tower top pipe (27), and tail gas burning furnace (28) outlet connection is steamed Vapour superheater (29) import, steam superheater (29) outlet connection the second waste heat boiler (30) import, the second waste heat boiler (30) Outlet connects chimney (31) by pipeline；Exhaust pipe (17) is equipped with stop valve (16), exhaust pipe (17) and absorbing tower Water sealed tank (24) are equipped between push pipe road (27), exhaust pipe (17) between trap (12) and stop valve (16) is equipped with the One bypass (23), the first bypass (23) are equipped with bypass valve (22), and the port of the first bypass (23) is located in water sealed tank (24) Water seal liquid level is hereinafter, pass through the second bypass (25) connection absorption tower tower top pipe (27) on the wall of water sealed tank (24) side.
8. tail gas of sulphur discharging processing device according to claim 7, it is characterised in that: liquid is arranged in sulphur sealed cans (13) side Injector (14) are arranged at the top of molten sulfur pond (15) in sulphur pond (15), and the outlet of injector (14) is connected by pipeline make respectively Sulphur furnace (3), first-stage reactor (7), second reactor (10) and hydrogenator (19).
9. tail gas of sulphur discharging processing device according to claim 7, it is characterised in that: the outlet at bottom of chilling tower (21) Stripper plant is connected by pipeline；The outlet at bottom on absorption tower (26) connects rich solution regenerating unit.
10. tail gas of sulphur discharging processing device according to claim 7, it is characterised in that: the steaming of steam generator (20) Vapor outlet is separately connected level-one steam heater (6), second steam heater (9), three-level steam heater (18)；Steam superheating The steam (vapor) outlet of device (29) is separately connected level-one steam heater (6), second steam heater (9), three-level steam heater (18)。
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CN109928368A (en) * 2019-04-22 2019-06-25 山西焦煤集团有限责任公司 The molten sulfur pond composite cover of Recovered sulphur steam
CN111928278A (en) * 2020-07-31 2020-11-13 中国石化北海炼化有限责任公司 Claus tail gas treatment device
CN112299378A (en) * 2019-08-02 2021-02-02 中国石油化工股份有限公司 Sulfur recovery device filled with sulfurized hydrogenation catalyst and start-up method
CN113385004A (en) * 2021-06-01 2021-09-14 曲晓明 Desulfurization method and device for sulfur production tail gas
CN113932229A (en) * 2020-07-14 2022-01-14 中国石油化工股份有限公司 Tail gas treatment device and sulfur recovery system

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CN105947992A (en) * 2016-06-02 2016-09-21 山东三维石化工程股份有限公司 SWSR-8 pressurization sulfur recovery process
CN108201774A (en) * 2018-01-25 2018-06-26 四川蓝海化工（集团）有限公司 Purifying exhausting gas of yellow phosphorus device
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Publication number Priority date Publication date Assignee Title
CN109928368A (en) * 2019-04-22 2019-06-25 山西焦煤集团有限责任公司 The molten sulfur pond composite cover of Recovered sulphur steam
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CN112299378A (en) * 2019-08-02 2021-02-02 中国石油化工股份有限公司 Sulfur recovery device filled with sulfurized hydrogenation catalyst and start-up method
CN112299378B (en) * 2019-08-02 2022-03-22 中国石油化工股份有限公司 Sulfur recovery device filled with sulfurized hydrogenation catalyst and start-up method
CN113932229A (en) * 2020-07-14 2022-01-14 中国石油化工股份有限公司 Tail gas treatment device and sulfur recovery system
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CN113385004A (en) * 2021-06-01 2021-09-14 曲晓明 Desulfurization method and device for sulfur production tail gas

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Denomination of invention: Sulfur tail gas discharge treatment process and unit

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