CN203558849U - Sulphur storage tail gas and liquid sulphur degassing comprehensive treatment system - Google Patents
Sulphur storage tail gas and liquid sulphur degassing comprehensive treatment system Download PDFInfo
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- CN203558849U CN203558849U CN201320701870.2U CN201320701870U CN203558849U CN 203558849 U CN203558849 U CN 203558849U CN 201320701870 U CN201320701870 U CN 201320701870U CN 203558849 U CN203558849 U CN 203558849U
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- molten sulfur
- sulfur
- sulphur
- tail gas
- degassed
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- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title claims abstract description 350
- 238000007872 degassing Methods 0.000 title claims abstract description 120
- 239000005864 Sulphur Substances 0.000 title claims abstract description 104
- 239000007788 liquid Substances 0.000 title claims abstract description 75
- 239000000463 material Substances 0.000 claims abstract description 16
- 230000007246 mechanism Effects 0.000 claims abstract description 15
- 229910052717 sulfur Inorganic materials 0.000 claims description 239
- 239000011593 sulfur Substances 0.000 claims description 239
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims description 33
- 238000010438 heat treatment Methods 0.000 claims description 19
- 230000008520 organization Effects 0.000 claims description 15
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 7
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 7
- 239000004571 lime Substances 0.000 claims description 7
- 238000012546 transfer Methods 0.000 claims description 7
- 230000008901 benefit Effects 0.000 abstract description 8
- 238000002156 mixing Methods 0.000 abstract description 3
- 238000002485 combustion reaction Methods 0.000 abstract description 2
- 230000007774 longterm Effects 0.000 abstract description 2
- 238000005507 spraying Methods 0.000 abstract 4
- 239000002253 acid Substances 0.000 abstract 1
- 235000001508 sulfur Nutrition 0.000 description 201
- 239000007789 gas Substances 0.000 description 72
- 238000000034 method Methods 0.000 description 11
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 10
- 238000006555 catalytic reaction Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 238000011084 recovery Methods 0.000 description 7
- 238000005265 energy consumption Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 238000005406 washing Methods 0.000 description 5
- 238000000605 extraction Methods 0.000 description 4
- 239000000945 filler Substances 0.000 description 4
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 241000748712 Colias canadensis Species 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000013022 venting Methods 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005504 petroleum refining Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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Abstract
The utility model discloses a sulphur storage tail gas and liquid sulphur degassing comprehensive treatment system which comprises a liquid sulphur storage device (1), a liquid sulphur degassing device (4) and a spraying device (6), wherein the top of the liquid sulphur degassing device (4) is communicated with an inlet of the spraying device (6) through a liquid sulphur degassing pipe (7), the top of the liquid sulphur storage device (1) is communicated with a bypass inlet of the spraying device (6) through a liquid sulphur tail gas pipe (8), and an outlet of the spraying device (6) is communicated with a supplied material mixing mechanism (11) on an acid gas combustion furnace (10) through a conveying pipe (9). According to the sulphur storage tail gas and liquid sulphur degassing comprehensive treatment system, the equipment investment can be reduced, long-term stable operation is ensured, the content of sulphur in tail gas of a tail gas incinerator is directly reduced, the direct influence of tail gas chimney SO2 emission is reduced into zero, the yield of the sulphur is increased, the pollution to the environment is reduced, and the economic benefit is increased when the requirement of new emission standard is met.
Description
Technical field
The utility model relates to Molten sulphur and removes H
2vent gas treatment technical field when S and Molten sulphur store, sulphur storage tail gas and molten sulfur degasification total system that specifically a kind of less investment, stable operation and resource organic efficiency are high.
Background technology
The treatment scheme of existing sulphur storage tail gas is as described below: the temperature that molten sulfur stores is generally between 130～150 ℃, the following molten sulfur storage facilities of molten sulfur storing unit 1(is take sulphur pond as example) be generally normal pressure design, under such operational condition, molten sulfur can produce a large amount of steam, for reducing sulphur vapor evolution to pollution on the environment in atmosphere, air suction inlet 14 is set on molten sulfur pond, after configuration jet apparatus 6 aspirates sulphur pond tail gas, through transfer lime 9, send into tail gas burning furnace 19 and burn, the SO producing after burning
2through delivery pipe 15, be delivered to chimney 16 and carry out high altitude discharge, the principle assumption diagram of existing sulphur storage vent gas treatment is as shown in accompanying drawing one.The treatment scheme of existing molten sulfur degasification is as described below: the H that contains 300～500ppm in the molten sulfur that reaction generates from reactor
2s, the national standard (GB/T2449-2006 industrial sulphur) of sulphur requires the mass percent of acidity (with H
2sO
4meter)≤0.003% conversion is for H
2s is≤10ppm, so must process to reduce H to Molten sulphur
2s content is to meet national standard requirement.The general air that adopts removes H at present
2the Degassing Technology of S, degasification process is carried out (following liquid sulfur degassing device 4 is take molten sulfur degasification tower as example) in liquid sulfur degassing device 4, the pressurized air that degassed compressed air-feed device 3 is supplied with is sent in the molten sulfur in molten sulfur degasification tower by pipeline, by with fully the contacting the H being dissolved in molten sulfur of molten sulfur
2s air lift out, H
2s enters molten sulfur degasification tower top gas-phase space with air is discharged from molten sulfur degasification top of tower, discharge containing H
2the gas of S is delivered to the interior burning of tail gas burning furnace 19 through molten sulfur degasification pipe 7, removes H
2molten sulfur after S meets the requirement of national standard, and the principle assumption diagram of existing molten sulfur degasification processing as shown in Figure 2.
China advocates energy-saving and emission-reduction always, strictly controls Sulfur Dioxide In The Atmosphere quantity discharged.National departments concerned is being fermented revision discharge standard of air pollutants, intends requiring newly-built sulphur unit sulfur dioxide emissioning concentration to be less than 400mg/Nm
3(particular locality emission concentration is less than 200mg/Nm
3).Sinopec is actively implemented green low-carbon development strategy, using reducing sulphur unit SO 2 from fume emission concentration, as oil refining plate, strives for one of world-class important indicator, requires sulfur dioxide emissioning concentration in the 2015 (400mg/Nm that reaches world-class levels
3, particular locality emission concentration is less than 200mg/Nm
3), and < < petroleum refining industry pollutant emission standard > > exposure draft issues, and sulphur unit sulfur dioxide emissioning concentration is less than 400mg/Nm
3, particular locality emission concentration is less than 200mg/Nm
3imperative.
In order to reach increasingly strict emission request, for sulphur pond vent gas treatment technology and liquid sulphur degasification technique flow process, some explorations have all been carried out at present.For the improvement project of sulphur pond vent gas treatment, be that tail gas jet apparatus 6 suctions in sulphur pond are sent into washing tower 17, by washing, tackle sulphur steam and reduce the sulphur content that enters tail gas burning furnace 19, the elemental sulfur that washing stays is recycled by recovery pump 18, and the principle assumption diagram of improved sulphur storage vent gas treatment as shown in Figure 3; The effect that a large amount of sulphur droplets is washed due to low temperature enters in water, thereby has reduced the absolute magnitude that enters tail gas burning furnace sulphur 19, to reducing SO in chimney 16
2discharge have positive effect.There are the following problems for this treatment scheme: Molten sulphur is suspended in water, and the Molten sulphur of suspension is easy to be bonded in e-quipment and pipe and causes system jams to move continuously for a long time, and for assurance system is moved continuously, it is one standby that this treatment scheme must complete one be opened.This scheme is just by pollution transportation in addition, and the sour water that washing produces could discharge after must processing.For the improvement project of liquid sulphur degasification technique flow process, be that the tail gas of molten sulfur degasification is changed into into sour gas burning furnace 10 by entering tail gas burning furnace 19, but will reach SO
2discharge is less than 400 mg/Nm
3cannot be guaranteed.
Research shows, degassed tail gas increase chimney SO
2the influence value of discharge is 150～300 mg/Nm
3, sulphur pond tail gas increases chimney SO
2the influence value of discharge is 100～200mg/Nm
3.
Summary of the invention
The purpose of this utility model is the problem existing for prior art, a kind of sulphur storage tail gas and molten sulfur degasification total system are provided, this total system can reduce facility investment, guarantee long-period stable operation, directly reduce the sulphur content that enters tail gas burning furnace tail gas, to tail gas funnel SO
2the direct impact of discharge reduces to zero, increases the output of sulphur simultaneously, reduces pollution to environment, has increased economic benefit when meeting the requirement of New emission standard.
The purpose of this utility model solves by the following technical programs:
A kind of sulphur storage tail gas and molten sulfur degasification total system, comprise molten sulfur storing unit, not degassed molten sulfur feedway, degassed compressed air-feed device, liquid sulfur degassing device, degassed molten sulfur take-off equipment and jet apparatus, the bottom of liquid sulfur degassing device is connected with degassed compressed air-feed device by pipeline, and liquid sulfur degassing device is connected with not degassed molten sulfur feedway and degassed molten sulfur take-off equipment by pipeline respectively, the top that it is characterized in that described liquid sulfur degassing device is connected with the entrance of jet apparatus by molten sulfur degasification pipe, and the top of molten sulfur storing unit is connected with the bypass entrance of jet apparatus by molten sulfur offgas duct, the outlet of jet apparatus is connected with the supplied materials mixed organization on sour gas burning furnace by transfer lime.
Described supplied materials mixed organization is connected with air supply pipe, and this supplied materials mixed organization is connected with sour gas feed mechanism by pipeline, and the exit of described sour gas feed mechanism is provided with valve.
On the pipeline of described molten sulfur storing unit, not degassed molten sulfur feedway, degassed compressed air-feed device, liquid sulfur degassing device, degassed molten sulfur take-off equipment, jet apparatus, sour gas burning furnace and connection said apparatus, be equipped with heating arrangements.
When described not degassed molten sulfur feedway is communicated with the top of liquid sulfur degassing device, degassed molten sulfur take-off equipment is connected with the bottom of liquid sulfur degassing device; When described not degassed molten sulfur feedway is communicated with the bottom of liquid sulfur degassing device, degassed molten sulfur take-off equipment is connected with the top of liquid sulfur degassing device.
When described degassed molten sulfur take-off equipment is connected with the top of liquid sulfur degassing device, the exit of liquid sulfur degassing device (4) is provided with upflow tube; The pipeline that described degassed molten sulfur take-off equipment is communicated with while being connected with the bottom of liquid sulfur degassing device is provided with level control valve.
On described molten sulfur storing unit, be at least provided with an air suction inlet.
Described molten sulfur storing unit is provided with level controling mechanism, temperature control device and fire-fighting fire extinguishing mechanism.
Described jet apparatus adopts injector or squirt pump.
The utility model has the following advantages compared to existing technology:
Sulphur storage tail gas of the present utility model and molten sulfur degasification total system can reduce facility investment, guarantee long-period stable operation, directly reduce the sulphur content that enters tail gas burning furnace tail gas, to tail gas funnel SO
2the direct impact of discharge reduces to zero, increases the output of sulphur simultaneously, reduces pollution to environment, has increased economic benefit when meeting the requirement of New emission standard.
Accompanying drawing explanation
Accompanying drawing 1 is the principle assumption diagram of existing sulphur storage vent gas treatment;
Accompanying drawing 4 is the principle assumption diagram of sulphur storage tail gas of the present utility model and molten sulfur degasification total system.
Wherein: 1-molten sulfur storing unit; 2-not degassed molten sulfur feedway; 3-degassed compressed air-feed device; 4-liquid sulfur degassing device; 5-degassed molten sulfur take-off equipment; 6-jet apparatus; 7-molten sulfur degasification pipe; 8-molten sulfur offgas duct; 9-transfer lime; 10-sour gas burning furnace; 11-supplied materials mixed organization; 12-air supply pipe; 13-sour gas feed mechanism; 14-air suction inlet; 15-delivery pipe; 16-chimney; 17-washing tower; 18-recovery pump; 19-tail gas burning furnace.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is further described.
As shown in Figure 4: a kind of sulphur storage tail gas and molten sulfur degasification total system, comprise molten sulfur storing unit 1, not degassed molten sulfur feedway 2, degassed compressed air-feed device 3, liquid sulfur degassing device 4, degassed molten sulfur take-off equipment 5 and jet apparatus 6, wherein the bottom of liquid sulfur degassing device 4 is connected with degassed compressed air-feed device 3 by pipeline, and liquid sulfur degassing device 4 is connected with not degassed molten sulfur feedway 2 and degassed molten sulfur take-off equipment 5 by pipeline respectively, the top of liquid sulfur degassing device 4 is connected with the entrance of jet apparatus 6 by molten sulfur degasification pipe 7 in addition, and the top of molten sulfur storing unit 1 is connected with the bypass entrance of jet apparatus 6 by molten sulfur offgas duct 8, the outlet of jet apparatus 6 is connected with the supplied materials mixed organization 11 on sour gas burning furnace 10 by transfer lime 9, this supplied materials mixed organization 11 is connected with air supply pipe 12, and supplied materials mixed organization 11 is established valvular sour gas feed mechanism 13 by pipeline and exit and is connected, on the pipeline of molten sulfur storing unit 1, not degassed molten sulfur feedway 2, degassed compressed air-feed device 3, liquid sulfur degassing device 4, degassed molten sulfur take-off equipment 5, jet apparatus 6, sour gas burning furnace 10 and connection said apparatus, be equipped with heating arrangements, this heating arrangements adopts steam heating or other type of heating simultaneously.
In said structure, the general sulphur pond that adopts of molten sulfur storing unit 1, also can adopt other molten sulfur storing device of sealing relatively, is at least provided with an air suction inlet 14 on molten sulfur storing unit 1, and air suction inlet 14 can increase valve; Level controling mechanism, temperature control device and fire-fighting fire extinguishing mechanism also can be set on molten sulfur storing unit 1, wherein level controling mechanism can be controlled automatically by the molten sulfur amount of sending, also can carry out by liquidometer is set the warning of height of liquid level, can also control by other means; Temperature control device can arrange thermometer with indication warning function, also the thermometer that prevents overtemperature can be set; Fire-fighting fire extinguishing mechanism can arrange the steam for fire xtinguishing system of automatic or manual, and the steam for fire xtinguishing system of fixed or semi-fixed type also can be set.Not degassed molten sulfur feedway 2 is provided with transferpump.The regulating and controlling loop of compressed air require can be set on degassed compressed-air supply system 3, compressed-air actuated heating facility also can be set, the measurement that compressed-air actuated temperature, pressure also can be set is reported to the police.Liquid sulfur degassing device 4 is pressurized vessel, can also can comprise other type of heating with steam jacket heating, can be that void tower can be also the tower with filler, filler can be catalyzer, general filler or other, can adverse current degassed also can following current degassed, can be with air-distributor also can not be with, can be with molten sulfur sparger also can not be with, can be with molten sulfur collector also can not be with, can be with liquid level control and temperature alarming, also can be with safety interlock system also can not be with, top can have pressure control system also can not have; During use, when not degassed molten sulfur feedway 2 is communicated with the top of liquid sulfur degassing device 4, degassed molten sulfur take-off equipment 5 is connected with the bottom of liquid sulfur degassing device 4, and now degassed molten sulfur take-off equipment 5 is provided with level control valve with the pipeline that the bottom of liquid sulfur degassing device 4 is communicated with; When not degassed molten sulfur feedway 2 is communicated with the bottom of liquid sulfur degassing device 4, degassed molten sulfur take-off equipment 5 is connected with the top of liquid sulfur degassing device 4, now in the exit, top of liquid sulfur degassing device 4, is provided with upflow tube.Jet apparatus 6 adopts injector or squirt pump.
When the utility model is used, from outside molten sulfur, be stored in the molten sulfur storing unit 1 that temperature is greater than 120 ℃, molten sulfur storing unit 1 needs external heat to keep molten sulfur temperature to be greater than 120 ℃, the height of temperature can show by thermometer, and according to the height of temperature, regulate the size of heating medium amount, when the abnormal overtemperature of occurrence temperature, the 1 interior generation spontaneous combustion of explanation possibility molten sulfur storing unit, need to open steam valve and pass into steam-smoothering in molten sulfur storing unit 1; The liquid level of molten sulfur storing unit 1 is by controlling discharging or charging is controlled; Being greater than in the gas-phase space of molten sulfur storing unit 1 of 120 ℃ exists molten sulfur steam also likely containing in molten sulfur, to volatilize trace hydrogen sulfide, this partial tail gas is connected to the bypass entrance of jet apparatus 6 by molten sulfur offgas duct 8, by jet apparatus 6, through transfer lime 9, sent into and after air that supplied materials mixed organization 11 sends into air supply pipe 12 mixes mutually, enter sour gas burning furnace 10 and burn.Gas-phase space in molten sulfur storing unit 1 is controlled at micro-negative pressure, by the powered compressor air capacity and the air imbibed quantity that regulate jet apparatus 6, come controlled, degassed tail gas to connecting pipeline and jet apparatus 6 to the pipeline of sour gas burning furnace 10 of jet apparatus 6 all needs external heat, conventionally can adopt steam jacket heating also can adopt other type of heating to guarantee that in pipe, temperature is greater than 120 ℃.
Liquid sulfur degassing device 4 is design of pressure vessels, can adopt molten sulfur degasification tower; The molten sulfur temperature that enters liquid sulfur degassing device 4 is greater than 120 ℃, and the temperature in liquid sulfur degassing device 4 is controlled at and is greater than 120 ℃, for this equipment of temperature maintaining in liquid sulfur degassing device 4 needs external heat, generally adopts jacket steam heating or other heating means.Be greater than 0.2Mpa(g) normal temperature compressed air after Flow-rate adjustment control (also can not having), be heated to and be greater than 60 ℃ (or not heating) and send in liquid sulfur degassing device 4 from liquid sulfur degassing device 4 bottoms, air reaches and fully the contacting of molten sulfur through molten sulfur layer from bottom to top uniformly, in the abundant contact process of air and molten sulfur, the hydrogen sulfide stripping being dissolved in molten sulfur is out entered in the top gas-phase space of liquid sulfur degassing device 4, the top gas phase of general control liquid sulfur degassing device 4 is greater than 0.15Mpa(g), concrete controlling valu is determined by the power size that sulphur pond tail gas can be sent into sour gas burning furnace 10 needs.The pressure at liquid sulfur degassing device 4 tops does not need control but need to arrange to report to the police to judge whether system has stopping state.Adding of molten sulfur can add molten sulfur to add from bottom from top, if molten sulfur adds from top, the extraction of molten sulfur need be from bottom, if adding of molten sulfur is that the extraction of molten sulfur need be from top from bottom.The liquid level of the molten sulfur in liquid sulfur degassing device 4 needs controlled, and top need to be left and must prevent that a large amount of molten sulfurs from entering in gas phase pipeline in gas-liquid separation space.The control of liquid level can be controlled by molten sulfur overflow extraction or by the valve on bottom extraction molten sulfur pipeline.Liquid sulfur degassing device 4 inside can be loaded catalyzer and promote deviating from of hydrogen sulfide in fully mixing of air and molten sulfur and molten sulfur, also can be that packing tower promotes fully mixing of air and molten sulfur, can be also void tower at this moment air by the air-distributor of liquid sulfur degassing device 4 interior settings, reach with the even of molten sulfur and fully mix.Molten sulfur degasification pipe 7, molten sulfur offgas duct 8, transfer lime 9 and other pipeline (general length is greater than 6m) being connected with liquid sulfur degassing device 4 all need external heat control tube wall temperature to be greater than 120 ℃, and type of heating adopts steam jacket also can adopt other heating means.
The wall temperature that jet apparatus 6 need to be controlled flow medium is greater than 120 ℃, generally adopts steam jacket heating also can adopt other heating means.Together with the tail gas that the tail gas that the hydrogen sulfide deviate from molten sulfur and sulphur steam are contained in the top of liquid sulfur degassing device 4 contains sulphur steam as the power of jet apparatus 6 by the top of molten sulfur storing unit 1, send into sour gas burning furnace 10,10 li of sour gas burning furnaces by adding air (also can add sour gas while needing) burning, the H that general control sour gas burning furnace 10 exports
2s/SO
2ratio in 2:1(or other ratios) after by condensate recovery liquid sulphur, catalyzed reaction further promotes H
2s/SO
2continue reaction and generate elemental sulfur, condensation is reclaimed after elemental sulfur, and the most of element sulphur in tail gas is all recovered as sulfur product.
Take 10 tons of sulphur units of domestic certain cover as example, the sulphur storage tail gas that the utility model provides and molten sulfur degasification total system and existing sulphur storage tail gas and molten sulfur degasification equipment with improved sulphur storage tail gas compared with molten sulfur degasification equipment, the energy consumption of existing sulphur storage tail gas and molten sulfur degasification equipment and facility investment are respectively 1344 MJ/h and 800,000 yuan of left and right, the energy consumption of improved sulphur storage tail gas and molten sulfur degasification equipment and facility investment are respectively 1025 MJ/h and 2,000,000 yuan of left and right, and the energy consumption of sulphur storage tail gas of the present utility model and molten sulfur degasification total system and facility investment are respectively 1459 MJ/h and 800,000 yuan of left and right.The advantage of existing treatment facility is low, the stable operation, normally many without checking maintenance and recovery sulphur of investment, and shortcoming is to increase tail gas SO2 discharge and can not meet SO
2be less than 400mg/Nm
3exhaust emission standard requirement; The advantage of improving treatment facility is that investment is high, and exhaust emission standard can meet SO
2be less than 400mg/Nm
3requirement, even by change solvent, adjust operating parameters also can meet SO
2be less than 200mg/Nm
3requirement, shortcoming is can not long-term operation, equipment needs often to safeguard, cleaning difficulty and the sour water that produces cause new pollution; And excellent, the stable operation of sulphur storage tail gas of the present utility model and molten sulfur degasification total system, normally without checking maintenance, exhaust emission standard can meet SO
2be less than 400mg/Nm
3requirement, by change solvent, adjust operating parameters also can meet SO
2be less than 200mg/Nm
3requirement, and with 48～96 tons/year of the many recovery sulphur of existing treatment facility phase specific energy, reduce and enter SO in atmosphere
2amount be 250～500mg/Nm
3, and to tail gas funnel SO
2the direct impact of discharge reduces to zero, has increased economic benefit when meeting the requirement of New emission standard.Above-mentioned energy consumption data calculates according to < < GB_T 50441-2007 petrochemical complex design energy consumption calculation standard > >.
Embodiment mono-
Referring to accompanying drawing 4,0.6Mpa(g) pressurized air through being heated to after 135 ℃, from the bottom of molten sulfur degasification tower (liquid sulfur degassing device 4), enter, in molten sulfur degasification tower, air-distributor is set, molten sulfur degasification tower adopts catalyst loading, 135 ℃ containing 300～500ppmH
2the molten sulfur of S is sent into from the bottom of molten sulfur degasification tower, and air and molten sulfur stream are through beds, and molten sulfur degasification tower top is provided with certain gas-phase space, and the tail gas of content of hydrogen sulphide and molten sulfur droplet enters gas-phase space; 135 ℃ containing being less than 10ppmH
2the molten sulfur of S is discharged by collector overflow.Molten sulfur degasification tower adopts steam jacket, the saturation steam that jacket steam is 0.5Mpa, and all pipelines that are connected with molten sulfur degasification tower all adopt steam jacket, the saturation steam that jacket steam is 0.5Mpa.
Temperature be housed be the molten sulfur of 150 ℃ in sulphur pond (molten sulfur storing unit 1), top is provided with two air suction inlets 14, top, sulphur pond is provided with venting port molten sulfur offgas duct 8 and is connected to injector (jet apparatus 6) bypass entrance, the control of molten sulfur liquid level is by sending molten sulfur control, the pressure in sulphur pond arranges warning, controls the micro-negative pressure in sulphur pond and prevent that sulfur-bearing steam from leaking during operation.Top, sulphur pond set temperature is reported to the police, and top, sulphur pond arranges fixed steam for fire xtinguishing interface, opens steam for fire xtinguishing and enter sulphur pond and put out a fire when sulphur pond head temperature is greater than 180 ℃.Sulphur pond adopts the concrete underground pond with liner, and sulphur pond adopts the saturation steam of 0.5MPa to heat to carry out holding temperature, and all pipelines that are connected with sulphur pond all adopt the steam jacket of 0.5MPa to be incubated.
The tail gas that is 0.5MPa from the molten sulfur degasification tower top pressure of 135 ℃ out, as the power of injector, sucks sulphur pond tail gas together to send into sour gas burning furnace 10.Injector adopts the steam jacket insulation of 0.5MPa, and all pipelines all adopt the steam jacket insulation of 0.5MPa.Two strands of tail gas enter after supplied materials mixed organization 11, in supplied materials mixed organization 11 with after air mixed, enter sour gas burning furnace 10 and burn, and sour gas burning furnace 10 temperature are controlled at and are greater than 950 ℃, H in sour gas burning furnace 10
2s is combusted into a certain proportion of H
2s and SO
2(H
2s/SO
2ratio relevant with the catalysis technique of employing, such as adopt conventional Claus catalysis technique, H
2s/SO
2=2) H, carrying secretly in tail gas after catalyzed reaction
2s finally generates product sulphur.With 100,000 tons/year of Sulfur recycling installments, be set to benchmark, the degassed tail gas of this total system and existing processing scheme send tail gas burning furnace, sulphur pond tail gas to send tail gas burning furnace can reduce chimney SO
2discharge 400mg/Nm
3, 77 tons/year of many recovery sulphur.
Embodiment bis-
Referring to accompanying drawing 4,0.6Mpa(g) pressurized air from the bottom of molten sulfur degasification tower (liquid sulfur degassing device 4), enter, in molten sulfur degasification tower, air-distributor is set, molten sulfur degasification tower adopts filler filling, 150 ℃ containing 300～500ppmH
2the molten sulfur of S is sent into from the bottom of molten sulfur degasification tower, and air and molten sulfur stream are through packing layer, and molten sulfur degasification tower top is provided with certain gas-phase space, and the tail gas of content of hydrogen sulphide and molten sulfur droplet enters gas-phase space; 140 ℃ of left and right are containing being less than 10ppmH
2the molten sulfur of S is discharged from the bottom of molten sulfur degasification tower.Molten sulfur degasification tower adopts steam jacket, the saturation steam that jacket steam is 0.5Mpa, and all pipelines that are connected with molten sulfur degasification tower all adopt steam jacket, the saturation steam that jacket steam is 0.5Mpa.
Temperature be housed be the molten sulfur of 150 ℃ in sulphur pond (molten sulfur storing unit 1), top is provided with two air suction inlets 14, top, sulphur pond is provided with venting port molten sulfur offgas duct 8 and is connected to the bypass entrance of injector (jet apparatus 6), the control of molten sulfur liquid level is by sending molten sulfur control, the pressure in sulphur pond arranges warning, controls the micro-negative pressure in sulphur pond and prevent that sulfur-bearing steam from leaking during operation.Top, sulphur pond set temperature is reported to the police, and top, sulphur pond arranges fixed steam for fire xtinguishing interface, opens steam for fire xtinguishing and enter sulphur pond and put out a fire when sulphur pond head temperature is greater than 180 ℃.Sulphur pond adopts the concrete underground pond with liner, and sulphur pond adopts the saturation steam of 0.5MPa to heat to carry out holding temperature, and all pipelines that are connected with sulphur pond all adopt the steam jacket of 0.5MPa to be incubated.
The tail gas that is 0.5MPa from the molten sulfur degasification tower top pressure of 140 ℃ out, as the power of injector, sucks sulphur pond tail gas together to send into sour gas burning furnace 10.Injector adopts the steam jacket insulation of 0.5MPa, and all pipelines all adopt the steam jacket insulation of 0.5MPa.Two strands of tail gas enter after supplied materials mixed organization 11, in supplied materials mixed organization 11 with after air mixed, enter sour gas burning furnace 10 and burn, and sour gas burning furnace 10 temperature are controlled at and are greater than 950 ℃, H in sour gas burning furnace 10
2s is combusted into a certain proportion of H
2s and SO
2(H
2s/SO
2ratio relevant with the catalysis technique of employing, such as adopt conventional Claus catalysis technique, H
2s/SO
2=2) H, carrying secretly in tail gas after catalyzed reaction
2s finally generates product sulphur.With 100,000 tons/year of Sulfur recycling installments, be set to benchmark, the degassed tail gas of this total system and existing processing scheme send tail gas burning furnace, sulphur pond tail gas to send tail gas burning furnace can reduce chimney SO
2discharge 450mg/Nm
3, 86 tons/year of many recovery sulphur.
Sulphur storage tail gas of the present utility model and molten sulfur degasification total system can reduce facility investment, guarantee long-period stable operation, directly reduce the sulphur content that enters tail gas burning furnace tail gas, to tail gas funnel SO
2the direct impact of discharge reduces to zero, increases the output of sulphur simultaneously, reduces pollution to environment, has increased economic benefit when meeting the requirement of New emission standard.
Above embodiment is only explanation technological thought of the present utility model, can not limit protection domain of the present utility model with this, every technological thought according to the utility model proposes, any change of doing on technical scheme basis, within all falling into the utility model protection domain; The technology that the utility model does not relate to all can be realized by prior art.
Claims (8)
1. a sulphur storage tail gas and molten sulfur degasification total system, comprise molten sulfur storing unit (1), not degassed molten sulfur feedway (2), degassed compressed air-feed device (3), liquid sulfur degassing device (4), degassed molten sulfur take-off equipment (5) and jet apparatus (6), the bottom of liquid sulfur degassing device (4) is connected with degassed compressed air-feed device (3) by pipeline, and liquid sulfur degassing device (4) is connected with not degassed molten sulfur feedway (2) and degassed molten sulfur take-off equipment (5) by pipeline respectively, the top that it is characterized in that described liquid sulfur degassing device (4) is connected with the entrance of jet apparatus (6) by molten sulfur degasification pipe (7), and the top of molten sulfur storing unit (1) is connected with the bypass entrance of jet apparatus (6) by molten sulfur offgas duct (8), the outlet of jet apparatus (6) is connected with the supplied materials mixed organization (11) on sour gas burning furnace (10) by transfer lime (9).
2. sulphur storage tail gas according to claim 1 and molten sulfur degasification total system, it is characterized in that described supplied materials mixed organization (11) is connected with air supply pipe (12), and this supplied materials mixed organization (11) is connected with sour gas feed mechanism (13) by pipeline, and the exit of described sour gas feed mechanism (13) is provided with valve.
3. sulphur storage tail gas according to claim 1 and molten sulfur degasification total system, is equipped with heating arrangements on the pipeline of molten sulfur storing unit (1), not degassed molten sulfur feedway (2), degassed compressed air-feed device (3), liquid sulfur degassing device (4), degassed molten sulfur take-off equipment (5), jet apparatus (6), sour gas burning furnace (10) and connection said apparatus described in it is characterized in that.
4. sulphur storage tail gas according to claim 1 and molten sulfur degasification total system, while it is characterized in that described not degassed molten sulfur feedway (2) is communicated with the top of liquid sulfur degassing device (4), degassed molten sulfur take-off equipment (5) is connected with the bottom of liquid sulfur degassing device (4); When described not degassed molten sulfur feedway (2) is communicated with the bottom of liquid sulfur degassing device (4), degassed molten sulfur take-off equipment (5) is connected with the top of liquid sulfur degassing device (4).
5. sulphur storage tail gas according to claim 4 and molten sulfur degasification total system, when the degassed molten sulfur take-off equipment (5) described in it is characterized in that is connected with the top of liquid sulfur degassing device (4), the exit of liquid sulfur degassing device (4) is provided with upflow tube; The pipeline that described degassed molten sulfur take-off equipment (5) is communicated with while being connected with the bottom of liquid sulfur degassing device (4) is provided with level control valve.
6. sulphur storage tail gas according to claim 1 and molten sulfur degasification total system, is characterized in that being at least provided with an air suction inlet (14) on described molten sulfur storing unit (1).
7. sulphur storage tail gas according to claim 1 and molten sulfur degasification total system, is characterized in that described molten sulfur storing unit (1) is provided with level controling mechanism, temperature control device and fire-fighting fire extinguishing mechanism.
8. sulphur storage tail gas according to claim 1 and molten sulfur degasification total system, is characterized in that described jet apparatus (6) adopts injector or squirt pump.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110655040A (en) * | 2019-11-05 | 2020-01-07 | 辽宁北方华锦五洲化工工程设计有限公司 | Liquid sulfur degassing process applied to refining device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110655040A (en) * | 2019-11-05 | 2020-01-07 | 辽宁北方华锦五洲化工工程设计有限公司 | Liquid sulfur degassing process applied to refining device |
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