CN105947990A - System and method for removing H2S in liquid sulfur - Google Patents
System and method for removing H2S in liquid sulfur Download PDFInfo
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- CN105947990A CN105947990A CN201610388424.9A CN201610388424A CN105947990A CN 105947990 A CN105947990 A CN 105947990A CN 201610388424 A CN201610388424 A CN 201610388424A CN 105947990 A CN105947990 A CN 105947990A
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- sulfur
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/02—Preparation of sulfur; Purification
- C01B17/0232—Purification, e.g. degassing
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Abstract
The invention discloses a system and method for removing H2S in liquid sulfur. The system for removing H2S in liquid sulfur comprises a liquid sulfur tank, a liquid sulfur pump, a liquid sulfur cooler, a liquid sulfur spray head, gas stirrers, a product liquid sulfur pump and a waste gas booster fan; liquid sulfur is stored in the liquid sulfur tank; the liquid sulfur pump is connected to the bottom of the liquid sulfur tank to pump liquid sulfur out of the liquid sulfur tank; the liquid sulfur cooler is connected with the liquid sulfur pump, and liquid sulfur pumped by the liquid sulfur pump is cooled in the liquid sulfur cooler; the liquid sulfur spray head is connected with the liquid sulfur cooler, and liquid sulfur cooled by the liquid sulfur cooler is sprayed back to the liquid sulfur tank through the liquid sulfur spray head; the gas stirrers are arranged in the liquid sulfur tank and used for stirring and conducting steam stripping on liquid sulfur in the liquid sulfur tank; the product liquid sulfur pump is connected to the bottom of the liquid sulfur tank, liquid sulfur in which H2S is removed is delivered to a granulation unit through the product liquid sulfur pump; the waste gas booster fan is arranged above the liquid sulfur tank and delivers waste gas to a sulfur production unit.
Description
Technical field
The present invention relates to remove H in molten sulfur2The technical field of S, particularly relates to H in a kind of removing molten sulfur2S
System and method.
Background technology
The molten sulfur that in oil refining, natural gas, Coal Chemical Industry, sulfur recovery unit produces all is dissolved with a small amount of H2S, molten
Solution is H in molten sulfur2Environment, safe and healthy etc. can be caused various harm by storage, molding and transport by S.
For ensureing that molten sulfur is processed safely or transports, it is necessary to removing is dissolved in H in molten sulfur2S。
H during industrial process uses removing molten sulfur at present2The method of S is varied, but has some shortcomings.
Common method one is to use base catalyst to promote H2The decomposition of S, conventional catalyst has ammonia, quinoline etc.；
This method needs spent catalyst, and the membership that adds of catalyst affects the quality of sulfur product；Conventional side
Method two is by spraying or agitation molten sulfur, making H2S escapes from liquid stream；Common molten sulfur sprinkler head is the most stifled
Plug, and for making molten sulfur contain H2S is less than 10mg/kg, in addition it is also necessary to note ammonia；Common method three be use air,
Noble gas or device exhaust carry out air stripping to molten sulfur, and owing to stripper is built in liquid stream, gas is at stripping
, the most easily there is channeling, thus reduce air stripping effect in molten sulfur in burst agitation tower in tower.And for
The process of degassing waste gas, generally delivers to incinerator and burns, so can cause device exhaust SO2Exceed standard.
It is desirable to there is H in a kind of removing molten sulfur2The system and method for S overcomes or at least alleviates above-mentioned
Defect.
Summary of the invention
It is an object of the invention to provide H in a kind of removing molten sulfur2The system and method for S overcomes existing skill
The problems referred to above present in art.
For achieving the above object, H during the present invention provides a kind of removing molten sulfur2The system of S, described removing liquid
H in sulfur2The system of S includes: molten sulfur pond, liquid sulfur pump, liquid stream cooler, molten sulfur shower nozzle, gas blender,
Product liquid sulfur pump and exhaust gas blower fan；
Molten sulfur pond, molten sulfur is deposited in described molten sulfur pond；
Liquid sulfur pump, described liquid sulfur pump is connected to the bottom in described molten sulfur pond, by described molten sulfur from described molten sulfur
Pond pumps out；
Liquid stream cooler, described liquid stream cooler is led to connect described liquid sulfur pump, is pumped out by described liquid sulfur pump
Liquid stream cool down in described liquid stream cooler；
Molten sulfur shower nozzle, described molten sulfur shower nozzle connects described liquid stream cooler, cold through described liquid stream cooler
But molten sulfur is back to described molten sulfur pond by the spray of described molten sulfur shower nozzle；
Gas blender, described gas blender is arranged on inside described molten sulfur pond, described gas blender
Molten sulfur in described molten sulfur pond is stirred and strips；
Product liquid sulfur pump, described product liquid sulfur pump is connected to the bottom in described molten sulfur pond, described removing H2S
Molten sulfur delivered to pelletizing unit by described product liquid sulfur pump；
Exhaust gas blower fan, described exhaust gas blower fan is arranged on the top in described molten sulfur pond, described waste gas
Waste gas is delivered to sulfur plants by booster fan.
Preferably, described liquid stream cooler is small size vertical waterpipe boiler, described small size vertical waterpipe boiler
Byproduct steam, the cooling of the easily controllable molten sulfur of described small size vertical waterpipe boiler is generated while cooling molten sulfur
Temperature, it is to avoid sulfur blocks up；And the byproduct steam that described small size vertical waterpipe boiler produces can be used for heat tracing.
Preferably, described molten sulfur shower nozzle uses the solid shower nozzle of spiral, and the solid shower nozzle of described spiral sprays at molten sulfur
Introduce a certain amount of air before going out, make air be sufficiently mixed before ejection with molten sulfur.
Preferably, described gas blender introduces heated air or the tail gas from absorption tower outlet,
Described air or tail gas spray from the nozzle of described gas blender, form stripping gas in liquid stream on spiral
Rise, and drive molten sulfur to rotate, it is achieved air stripping and the stirring to molten sulfur, under the agitation of stripping gas, molten sulfur exists
Iterative cycles in described molten sulfur pond, and by air or the gas stripping of tail gas, promote H2S separates out from molten sulfur
Process.
Preferably, H in described removing molten sulfur2The system of S also includes keeping off sulfur device, and described gear sulfur device connects described
Exhaust gas blower fan, the described desulfurization waste gas through gas blender enters described waste gas by described gear sulfur device
Booster fan, described gear sulfur device is the sulfur separating mechanism of the baffle plate composition with radian, and described desulfurization waste gas exists
Described gear sulfur device constantly changes the flow direction, makes the drop carried secretly be strengthened by bigger centrifugal force, curved baffle
This centrifugal action, the most described molten sulfur collides on described curved baffle, and
Adhere on described curved baffle, gather after under gravity from flowing back into molten sulfur pond.
H in a kind of removing molten sulfur2The method of S, it is characterised in that comprise the following steps:
(1) molten sulfur delivers to liquid sulphur cooler through liquid sulfur pump circulating pump, for preventing molten sulfur cooled at molten sulfur
Liquid sulphur cooler described in frozen plug in journey, is directly added into low-pressure steam in boiler feedwater, controlledly will
Boiler feedwater is preheated to 130 DEG C, and the boiler feedwater after preheating is liquid sulphur cooler feedwater, can ensure molten sulfur
Do not solidify, molten sulfur can be cooled to 150 DEG C again；
(2) molten sulfur through molten sulfur cooling is back to molten sulfur pond from the spray of molten sulfur shower nozzle, it is achieved the circulation of molten sulfur is cold
But with the process of sprinkling；
(3) gas blender introduce heated air or from absorption tower outlet tail gas to described molten sulfur
Molten sulfur in pond is stirred and strips；
(4) through step (3) desulfurization waste gas by gear sulfur device, make the molten sulfur in desulfurization waste gas return
Go back to described molten sulfur pond, thus prevent the sulfur of subsequent pipeline to block up；
(5) delivered to the sulfur stove processed of sulfur plants by exhaust gas blower fan through the desulfurization waste gas of step (4)
Or hydrogenation reduction device, when the gas blender in step (3) introduces heated air as stripping
Gas, desulfurization waste gas is delivered to the sulfur stove processed of sulfur plants, the gas in step (3) by exhaust gas blower fan
Agitator introduces tail gas and is delivered to the sulfur stove processed of sulfur plants as stripping gas, desulfurization waste gas by exhaust gas blower fan
Or hydrogenation reduction device；
(6) described product liquid sulfur pump is connected to the bottom in the described molten sulfur pond through step (4), and by liquid
Sulfur is pumped to pelletizing unit.
The invention provides H in a kind of removing molten sulfur2The system and method for S, by the removing molten sulfur of the present invention
Middle H2The system and method for S improves molten sulfur removing H2The effect of S, can be by the H in liquid stream2S is down to
10mg/kg, also can improve the sulfur recovery rate of sulfur recovery unit, reduces the SO in sulfur recovery unit tail gas2
Content.
Accompanying drawing explanation
Fig. 1 is H in removing molten sulfur2The structural representation of the system of S.
Fig. 2 is H in removing molten sulfur2The structural representation of the liquid stream cooler of the system of S.
Fig. 3 is H in removing molten sulfur2The structural representation of the molten sulfur shower nozzle of the system of S.
Fig. 4 is H in removing molten sulfur2The structural representation of the gas blender of the system of S.
Fig. 5 is H in removing molten sulfur2The structural representation of the gear sulfur device of the system of S.
Detailed description of the invention
Clearer, below in conjunction with the present invention for the purpose making the present invention implement, technical scheme and advantage
Accompanying drawing in embodiment, is further described in more detail the technical scheme in the embodiment of the present invention.At accompanying drawing
In, the most same or similar label represents same or similar element or has same or like function
Element.Described embodiment is a part of embodiment of the present invention rather than whole embodiments.Below
It is exemplary by the embodiment being described with reference to the drawings, it is intended to be used for explaining the present invention, and it is not intended that
Limitation of the present invention.Based on the embodiment in the present invention, those of ordinary skill in the art are not making wound
The every other embodiment obtained under the property made work premise, broadly falls into the scope of protection of the invention.Tie below
Close accompanying drawing embodiments of the invention are described in detail.
In describing the invention, it is to be understood that term " " center ", " longitudinally ", " laterally ", "front", "rear",
The orientation of the instruction such as "left", "right", " vertically ", " level ", " top ", " end " " interior ", " outward " or position relationship are for based on accompanying drawing institute
The orientation shown or position relationship, be for only for ease of the description present invention and simplify description rather than instruction or dark
Show that device or the element of indication must have specific orientation, with specific azimuth configuration and operation, the most not
It is understood that as limiting the scope of the invention.
In the present invention one broad embodiment: the present invention provides H in a kind of removing molten sulfur2The system of S, bag
Include: molten sulfur pond, liquid sulfur pump, liquid stream cooler, molten sulfur shower nozzle, gas blender, product liquid sulfur pump and useless
Gas booster fan；Molten sulfur pond, molten sulfur is deposited in described molten sulfur pond；Liquid sulfur pump, described liquid sulfur pump is connected to described
The bottom in molten sulfur pond, pumps out described molten sulfur from described molten sulfur pond；Liquid stream cooler, described liquid stream cools down
Device leads to connect described liquid sulfur pump, and the liquid stream pumped out by described liquid sulfur pump is cooled down in described liquid stream cooler；
Molten sulfur shower nozzle, described molten sulfur shower nozzle connects described liquid stream cooler, through the liquid of described liquid stream cooler cooling
Sulfur is back to described molten sulfur pond by the spray of described molten sulfur shower nozzle；Gas blender, described gas blender is arranged on
Inside described molten sulfur pond, the molten sulfur in described molten sulfur pond is stirred and strips by described gas blender；Produce
Product liquid sulfur pump, described product liquid sulfur pump is connected to the bottom in described molten sulfur pond, described removing H2The molten sulfur of S by
Pelletizing unit delivered to by described product liquid sulfur pump；Exhaust gas blower fan, described exhaust gas blower fan is arranged on described
The top in molten sulfur pond, waste gas is delivered to sulfur plants by described exhaust gas blower fan.
As it is shown in figure 1, H in a kind of removing molten sulfur2The system of S includes: molten sulfur pond 1, liquid sulfur pump 2, liquid
Stream cooler 3, molten sulfur shower nozzle 4, gas blender 5, product liquid sulfur pump 6, gear sulfur device 7 and waste gas increase
Pressure fan 8.
Described molten sulfur pond 1 is used for depositing molten sulfur.
Described liquid sulfur pump 2 is connected to the bottom in described molten sulfur pond 1, by described molten sulfur from described molten sulfur pond 1
In pump out.
Described liquid stream cooler 3 leads to connect described liquid sulfur pump 2, the liquid stream pumped out by described liquid sulfur pump 2
Cool down in described liquid stream cooler 3.
Described molten sulfur shower nozzle 4 connects described liquid stream cooler 3, through the cooling of described liquid stream cooler 3
Molten sulfur is back to described molten sulfur pond 1 by the spray of described molten sulfur shower nozzle 4.
It is internal that described gas blender 5 is arranged on described molten sulfur pond 1, and described gas blender 5 is to described
Molten sulfur in molten sulfur pond 1 is stirred and strips.
Described product liquid sulfur pump 6 is connected to the bottom in described molten sulfur pond 1, described removing H2The molten sulfur of S by
Pelletizing unit delivered to by described product liquid sulfur pump 6.
Described gear sulfur device 7 connects described exhaust gas blower fan 8, the described desulfurization through gas blender 5
Waste gas enters described exhaust gas blower fan 8 by described gear sulfur device 7.
Exhaust gas blower fan, described exhaust gas blower fan is arranged on the top in described molten sulfur pond, described waste gas
Waste gas is delivered to sulfur plants by booster fan.
As in figure 2 it is shown, described liquid stream cooler 3 is small size vertical waterpipe boiler, described minitype vertical type water
Pipe boiler generates byproduct steam, the easily controllable molten sulfur of described small size vertical waterpipe boiler while cooling molten sulfur
Chilling temperature, it is to avoid sulfur block up；And the byproduct steam that described small size vertical waterpipe boiler produces can be used for accompanying
Heat.
As it is shown on figure 3, described molten sulfur shower nozzle 4 uses the solid shower nozzle of spiral, the solid shower nozzle of described spiral to exist
Introduce a certain amount of air before molten sulfur ejection, make air be sufficiently mixed before ejection with molten sulfur.Described spiral is real
Heart sprinkler is effective, can prevent sulfur from blocking up；And introduce a certain amount of air, make air and molten sulfur in spray
It is sufficiently mixed before going out, on the one hand can strengthen the spray effect of molten sulfur, spray liquid-drop diameter less, increase gas
Liquid contact area, makes degasifying effect more preferable；On the other hand add the chance of molten sulfur and air contact, increase
H2S and air oxidation are the probability of sulfur.
As shown in Figure 4, described gas blender 5 introduces heated air or the tail from absorption tower outlet
Gas, described air or tail gas spray from the nozzle of described gas blender 5, form stripping gas spiral shell in liquid stream
Screw on liter, and drive molten sulfur to rotate, it is achieved air stripping and the stirring to molten sulfur, under the agitation of stripping gas, liquid
Sulfur is iterative cycles in described molten sulfur pond 1, and by air or the gas stripping of tail gas, promotes H2S from
The process that molten sulfur separates out.
As it is shown in figure 5, described gear sulfur device 7 is the sulfur separating mechanism of the baffle plate composition with radian, described de-
Sulfur waste gas constantly changes the flow direction in described gear sulfur device 7, makes the drop carried secretly by bigger centrifugal force, arc
Shape baffle plate strengthens this centrifugal action, and the most described molten sulfur collides described arc gear
On plate, and adhere on described curved baffle, gather after under gravity from flowing back into molten sulfur pond 1,
Described gear sulfur device 7 can reduce the molten sulfur entrainment of degassing waste gas more than 90%.
H in a kind of removing molten sulfur2The method of S comprises the following steps:
(1) molten sulfur delivers to liquid sulphur cooler through liquid sulfur pump circulating pump, for preventing molten sulfur cooled at molten sulfur
Liquid sulphur cooler described in frozen plug in journey, is directly added into low-pressure steam in boiler feedwater, controlledly will
Boiler feedwater is preheated to 130 DEG C, and the boiler feedwater after preheating is liquid sulphur cooler feedwater, can ensure molten sulfur
Do not solidify, molten sulfur can be cooled to 150 DEG C again；If the boiler feedwater provided is more than 120 DEG C, then may be used
Feedwater directly as liquid sulphur cooler；
(2) molten sulfur through molten sulfur cooling is back to molten sulfur pond from the spray of molten sulfur shower nozzle, it is achieved the circulation of molten sulfur is cold
But with the process of sprinkling；
(3) gas blender introduce heated air or from absorption tower outlet tail gas to described molten sulfur
Molten sulfur in pond is stirred and strips, and research shows, containing H2S gas carries out air stripping to described molten sulfur,
H in liquid stream can be promoted equally2The precipitation of S；And H in stripping gas2The process that S is dissolved in liquid stream is very
Slowly, even H2The gas of S content 50% promotes the H in molten sulfur to molten sulfur air stripping2The effect that S separates out
The most clearly；
(4) through step (3) desulfurization waste gas by gear sulfur device, make the molten sulfur in desulfurization waste gas return
Go back to described molten sulfur pond, thus prevent the sulfur of subsequent pipeline to block up；
(5) delivered to the sulfur stove processed of sulfur plants by exhaust gas blower fan through the desulfurization waste gas of step (4)
Or hydrogenation reduction device, when the gas blender in step (3) introduces heated air as stripping
Gas, desulfurization waste gas is delivered to the sulfur stove processed of sulfur plants, the gas in step (3) by exhaust gas blower fan
Agitator introduces tail gas and is delivered to the sulfur stove processed of sulfur plants as stripping gas, desulfurization waste gas by exhaust gas blower fan
Or hydrogenation reduction device；
(6) described product liquid sulfur pump is connected to the bottom in the described molten sulfur pond through step (4), and will
Pelletizing unit delivered to by liquid sulfur pump.
Last it is noted that above example is only in order to illustrate technical scheme, rather than right
It limits.Although the present invention being described in detail with reference to previous embodiment, the ordinary skill of this area
Personnel it is understood that the technical scheme described in foregoing embodiments still can be modified by it, or
Wherein portion of techniques feature is carried out equivalent；And these amendments or replacement, do not make relevant art side
The essence of case departs from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (6)
1. H in a removing molten sulfur2The system of S, it is characterised in that including: molten sulfur pond, liquid sulfur pump,
Liquid stream cooler, molten sulfur shower nozzle, gas blender, product liquid sulfur pump and exhaust gas blower fan；
Molten sulfur pond, molten sulfur is deposited in described molten sulfur pond；
Liquid sulfur pump, described liquid sulfur pump is connected to the bottom in described molten sulfur pond, by described molten sulfur from described molten sulfur
Pond pumps out；
Liquid stream cooler, described liquid stream cooler is led to connect described liquid sulfur pump, is pumped out by described liquid sulfur pump
Liquid stream cool down in described liquid stream cooler；
Molten sulfur shower nozzle, described molten sulfur shower nozzle connects described liquid stream cooler, cold through described liquid stream cooler
But molten sulfur is back to described molten sulfur pond by the spray of described molten sulfur shower nozzle；
Gas blender, described gas blender is arranged on inside described molten sulfur pond, described gas blender
Molten sulfur in described molten sulfur pond is stirred and strips；
Product liquid sulfur pump, described product liquid sulfur pump is connected to the bottom in described molten sulfur pond, described removing H2S
Molten sulfur delivered to pelletizing unit by described product liquid sulfur pump；
Exhaust gas blower fan, described exhaust gas blower fan is arranged on the top in described molten sulfur pond, described waste gas
Waste gas is delivered to sulfur plants by booster fan.
2. H in removing molten sulfur as claimed in claim 12The system of S, it is characterised in that: described liquid stream
Cooler is small size vertical waterpipe boiler, and described small size vertical waterpipe boiler generates pair while cooling molten sulfur
Producing steam, the chilling temperature of the easily controllable molten sulfur of described small size vertical waterpipe boiler, it is to avoid sulfur blocks up；And institute
The byproduct steam stating small size vertical waterpipe boiler generation can be used for heat tracing.
3. H in removing molten sulfur as claimed in claim 22The system of S, it is characterised in that: described molten sulfur
Shower nozzle uses the solid shower nozzle of spiral, and the solid shower nozzle of described spiral introduces a certain amount of air before molten sulfur sprays,
Air is made to be sufficiently mixed before ejection with molten sulfur.
4. H in removing molten sulfur as claimed in claim 12The system of S, it is characterised in that: described gas
Agitator introduces heated air or the tail gas from absorption tower outlet, and described air or tail gas are from described gas
The nozzle ejection of body agitator, forms stripping gas spiral in liquid stream, and drives molten sulfur to rotate, it is achieved
Air stripping and stirring to molten sulfur, under the agitation of stripping gas, molten sulfur is iterative cycles in described molten sulfur pond, and
By air or the gas stripping of tail gas, promote H2The process that S separates out from molten sulfur.
5. H in removing molten sulfur as claimed in claim 42The system of S, it is characterised in that: described removing
H in molten sulfur2The system of S also includes keeping off sulfur device, and described gear sulfur device connects described exhaust gas blower fan, described warp
The desulfurization waste gas crossing gas blender enters described exhaust gas blower fan, described gear sulfur device by described gear sulfur device
Being the sulfur separating mechanism of the baffle plate composition with radian, described desulfurization waste gas constantly changes in described gear sulfur device
Flowing to, make the drop carried secretly by bigger centrifugal force, curved baffle strengthens this centrifugal action,
Under the effect of centrifugal force, described molten sulfur collides on described curved baffle, and adhere on described curved baffle,
Under gravity from flowing back into molten sulfur pond after accumulation.
6. H in a removing molten sulfur2The method of S, it is characterised in that comprise the following steps:
(1) molten sulfur delivers to liquid sulphur cooler through liquid sulfur pump circulating pump, for preventing molten sulfur cooled at molten sulfur
Liquid sulphur cooler described in frozen plug in journey, is directly added into low-pressure steam in boiler feedwater, controlledly will
Boiler feedwater is preheated to 130 DEG C, and the boiler feedwater after preheating is liquid sulphur cooler feedwater, can ensure molten sulfur
Do not solidify, molten sulfur can be cooled to 150 DEG C again；
(2) molten sulfur through molten sulfur cooling is back to molten sulfur pond from the spray of molten sulfur shower nozzle, it is achieved the circulation of molten sulfur is cold
But with the process of sprinkling；
(3) gas blender introduce heated air or from absorption tower outlet tail gas to described molten sulfur
Molten sulfur in pond is stirred and strips；
(4) through step (3) desulfurization waste gas by gear sulfur device, make the molten sulfur in desulfurization waste gas return
Go back to described molten sulfur pond, thus prevent the sulfur of subsequent pipeline to block up；
(5) delivered to the sulfur stove processed of sulfur plants by exhaust gas blower fan through the desulfurization waste gas of step (4)
Or hydrogenation reduction device, when the gas blender in step (3) introduces heated air as stripping
Gas, desulfurization waste gas is delivered to the sulfur stove processed of sulfur plants, the gas in step (3) by exhaust gas blower fan
Agitator introduces tail gas and is delivered to the sulfur stove processed of sulfur plants as stripping gas, desulfurization waste gas by exhaust gas blower fan
Or hydrogenation reduction device；
(6) described product liquid sulfur pump is connected to the bottom in the described molten sulfur pond through step (4), and will
Pelletizing unit delivered to by liquid sulfur pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610388424.9A CN105947990A (en) | 2016-06-02 | 2016-06-02 | System and method for removing H2S in liquid sulfur |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610388424.9A CN105947990A (en) | 2016-06-02 | 2016-06-02 | System and method for removing H2S in liquid sulfur |
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| CN201610388424.9A Pending CN105947990A (en) | 2016-06-02 | 2016-06-02 | System and method for removing H2S in liquid sulfur |
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| CN107720704A (en) * | 2017-09-30 | 2018-02-23 | 中国化学工程第六建设有限公司 | Liquid sulfur degassing device |
| CN107804828A (en) * | 2017-09-30 | 2018-03-16 | 中国化学工程第六建设有限公司 | Molten sulfur retracting device |
| CN115724408A (en) * | 2021-08-31 | 2023-03-03 | 中国石油化工股份有限公司 | Degassing treatment device and method for liquid sulfur |
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