CN103232026A - Three-stage liquid sulfur degasification device and process - Google Patents
Three-stage liquid sulfur degasification device and process Download PDFInfo
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- CN103232026A CN103232026A CN2013101457170A CN201310145717A CN103232026A CN 103232026 A CN103232026 A CN 103232026A CN 2013101457170 A CN2013101457170 A CN 2013101457170A CN 201310145717 A CN201310145717 A CN 201310145717A CN 103232026 A CN103232026 A CN 103232026A
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Abstract
The invention relates to a three-stage liquid sulfur degasification (TGSD) device and process. The device comprises a liquid sulfur storage tank, a liquid sulfur pump and a liquid sulfur degasification tower. The process comprises three degasification stages of spray degasification, bubbling degasification and catalytic oxidation and stripping degasification. The process comprises the following specific steps: feeding liquid sulfur into the liquid sulfur degasification tower through the liquid sulfur pump, and spraying the liquid sulfur into a rotating filler through a liquid sulfur distributor, thus sufficiently releasing hydrogen sulfide gas therein; under the conditions that the pressure is 0.1-0.8 MPa and the temperature is 120-157 DEG C, enabling air to be in cross flow contact with the liquid sulfur at the rotating filler part, wherein the air enters the liquid sulfur through bubbling in the liquid sulfur at the tower bottom and removes part of the hydrogen sulfide; performing two functions of oxidation and stripping to remove the hydrogen sulfide in the liquid sulfur; transferring the hydrogen-sulfide-containing gas into a sulfur preparation reaction furnace to perform combustion; transferring the liquid sulfur to the tower bottom, and performing air bubbling to further remove the hydrogen sulfide; and transferring the degasified liquid sulfur into a liquid sulfur molding or storage unit. By adopting the process, the H2S concentration in the liquid sulfur is reduced to 10mu g/g or below; and the SO2 concentration in flue gas emitted by the device can be reduced by 150-200 mg/Nm<3>.
Description
Technical field
The invention belongs to the field of environment protection that reduces sulfur dioxide emissions, relate to a kind of molten sulfur degasification method that is applicable to sulfur recovery facility, what be specifically related to is to utilize air-atomizing, catalytic oxidation and stir the degas method that removes hydrogen sulfide in the molten sulfur that separates.Background technology
China advocates energy-saving and emission-reduction work always, strict control sulfur dioxide in air quantity discharged, and before 2012, the sulfur dioxide emissioning concentration of national Specification is not for being higher than 960mg/g.National departments concerned is being fermented the revision discharge standard of air pollutants at present, requires newly-built sulphur unit sulfur dioxide emissioning concentration less than 400mg/Nm
3(the particular locality emission concentration is less than 200mg/Nm
3).Sinopec is actively implemented the green low-carbon development strategy, strives for one of world-class important indicator reducing sulphur unit SO 2 from fume emission concentration as the oil refining plate, requires sulfur dioxide emissioning concentration in 2015 (400mg/Nm that reaches world-class levels
3), part enterprise reaches world lead level (200mg/Nm
3).
The H that generally contains 300-500ppm in the molten sulfur that sulphur processed unit produces
2S and H
2Sx, sulfocompound is mainly hydrogen sulfide and part simple substance sulphur (steam) in the molten sulfur degasification waste gas, present degasification technique does not carry out off gas treatment and directly waste gas is entered incinerator, in the waste gas with sulphides burn generate sulfurous gas, make that sulfur dioxide emissioning concentration increases by 100～200mg/Nm in the fume emission
3Therefore, the sulfur in smoke emission concentration be reduced, the sulphur in the waste gas of molten sulfur degassing back must be recycled.
The molten sulfur of Crouse's sulphur recovery is dissolved with the H of different concns according to the service temperature difference
2S is mostly with polysulfide (H
2Sx) form exists, and environment is polluted in packing, storage, transportation for fear of product, and infringement operator's health need be to the molten sulfur processing that outgases.
Present sulfur recovery facility, liquid sulphur degasification technique adopt bubbling degassing method and circulation degassing method mostly, and waste gas is drawn to tail gas burning furnace with steam injector and burns, and the element sulphur in the waste gas is finally with SO
2Form be disposed to atmosphere, environment produce is polluted, studies show that the sulphur fume emission is because the SO that molten sulfur degasification increases
2The concentration affects value is 100～300mg/m
3
Summary of the invention
The object of the present invention is to provide a kind of three grades of molten sulfur degasification devices and technology, to reduce sulfur recovery facility to the method for the molten sulfur degasification of the sulfur dioxide in flue gas content of airborne release, guarantee degassing molten sulfur H
2S concentration＜10 μ g/g will remove waste gas and deliver to reaction of Salmon-Saxl stove processed Clause reaction further takes place, and eliminate molten sulfur degasification to fume emission SO
2The influence of concentration.
Purpose of the present invention can reach by following measure:
A kind of three grades of molten sulfur degasification devices, comprise the molten sulfur storage tank, liquid sulfur pump and molten sulfur degasification tower, molten sulfur advances the pump line and connects molten sulfur storage tank and liquid sulfur pump, molten sulfur advances the tower line and connects liquid sulfur pump and molten sulfur degasification tower, molten sulfur degasification tower inside arranges the molten sulfur trap, the molten sulfur sparger, rotary filler layer and bubbling facility, the molten sulfur trap is arranged on the inner side-wall on molten sulfur degasification tower top, the molten sulfur trap connects gas and goes out the tower line, gas goes out the tower line and connects reaction of Salmon-Saxl stove processed, molten sulfur advances the tower line and connects the molten sulfur sparger that is positioned at molten sulfur trap below, the molten sulfur sparger is provided with the distribution hole, the molten sulfur sparger is rotated the packing layer parcel, rotary filler layer is by the variable-frequency motor control that is positioned at top, molten sulfur degasification tower outside, the bubbling facility is positioned at the below of molten sulfur degasification tower inside, the bubbling facility is connected with the pressurized air feeding line, and the molten sulfur degasification tower bottom connects molten sulfur and goes out the tower line.
A kind of three grades of liquid sulphur degasification techniques namely remove the method for hydrogen sulfide from molten sulfur, comprise the three grades of degassings that outgas of catalytic oxidation that molten sulfur sprays the degassing, the bubbling degassing and rotary filler layer and stripping, and concrete steps are as follows:
1. molten sulfur sprays the degassing: molten sulfur evenly is sprayed onto in the rotary filler layer of degassing tower through the molten sulfur sparger, partly discharges hydrogen sulfide wherein;
The molten sulfur of sulfur recovery facility production is transported in the molten sulfur storage tank through molten sulfur storage tank feeding line, molten sulfur advances the pump line through molten sulfur and enters liquid sulfur pump, and advance the tower line through molten sulfur and send into the molten sulfur sparger that is arranged in the molten sulfur degasification tower, distribution hole on the molten sulfur sparger is sprayed onto the rotary filler layer inboard equably with molten sulfur, discharges hydrogen sulfide wherein;
2. the bubbling degassing: the molten sulfur pull-up was except the sulfide in the molten sulfur at the bottom of the pressurized air bubbling entered tower
The compressed air feed line of pressurized air enters the bubbling facility, bubbling in the molten sulfur layer stirs the molten sulfur layer, and the hydrogen sulfide in the molten sulfur is separated, oxygen in the pressurized air and the hydrogen sulfide in the molten sulfur, polysulfide generation oxidative decomposition further discharge the sulfide in the molten sulfur;
3. catalytic oxidation and the stripping degassing: through the abundant catalytic oxidation of rotation filler realization air and molten sulfur, decomposition removes sulfide
Pressurized air in molten sulfur layer at the bottom of the tower behind the bubbling, with the Molten sulphur that the molten sulfur sparger sprays, oxidizing reaction further takes place in the cross-flow contact on rotary filler layer, and wherein hydrogen polysulfide is further decomposed, and discharges more hydrogen sulfide;
The air that contains a small amount of hydrogen sulfide contacts with the molten sulfur cross-flow in rotary filler layer, and stripping removes the hydrogen sulfide in the molten sulfur.
4. the overhead gas of H 2 S-containing gas enters sulphur unit reaction of Salmon-Saxl stove processed
Isolated gas captures through the molten sulfur trap and leaves degassing tower after removing the molten sulfur of carrying secretly in the gas in rotary filler layer, utilizes self pressure to go out the tower line through gas and enters reaction of Salmon-Saxl stove processed;
5. isolated molten sulfur enters at the bottom of the tower in rotary filler layer, further removes wherein hydrogen sulfide through the air bubbling, and degassing back molten sulfur is sent into molten sulfur forming unit or molten sulfur storage element.
The working pressure 0.1-0.8Mpa of described molten sulfur degasification tower, temperature is 120～157 ℃.
Described molten sulfur boosts to 0.13～1.2Mpa when passing through liquid sulfur pump.
Described compressed-air actuated pressure is 0.5～1.0Mpa.
The raw material molten sulfur is sent in the molten sulfur degasification tower by liquid sulfur pump, is sprayed onto the filler inside of rotation through the molten sulfur sparger, forms liquid film at filling surface, is conducive to the wherein separation of hydrogen sulfide.
Described molten sulfur sparger is provided with the distribution hole, and the pressure that relies on liquid sulfur pump to provide sprays out molten sulfur, because the liquid sulfur pump top hole pressure is higher than molten sulfur degasification tower internal pressure, so molten sulfur can spray out.
Rotation filler in the described molten sulfur degasification tower is stainless steel porous corrugated plate packing or plastics porous plate filler.Rotation filling surface in the described molten sulfur degasification tower is long-pending big, and molten sulfur becomes liquid film on the surface, and is effective with the air contact mass transfer, and the hydrogen sulfide in the molten sulfur is fully contacted with airborne oxygen, oxidation takes place generate elemental sulfur.
2H
2S+O
2－→2S+2H
2O
H
2S
x+1/2O
2－→S
x+H
2O
Rotary filler layer is driven by variable-frequency motor, and molten sulfur is sprayed to filler inside through the molten sulfur sparger, and that leans on rotating bed radially is evenly distributed to filling surface from power power, flows down along outer wall at last, and simultaneously, filler itself also has the effect that captures vaporific molten sulfur.
At the bottom of the described molten sulfur degasification Tata, utilize air bubbling facility that molten sulfur is stirred, thereby strengthen the effusion of hydrogen sulfide.
Described molten sulfur trap is made up of silk screen.The H 2 S-containing gas that the molten sulfur degasification column overhead is deviate from before sending into reaction of Salmon-Saxl stove processed, removes the liquid sulfur mist of carrying secretly in the gas through silk screen and gas-phase space earlier.
Compared with prior art, the present invention has the following advantages:
(1) sulfurous gas that removes of molten sulfur degasification all enters reaction of Salmon-Saxl stove processed and the Clause reaction further takes place generates sulphur, and does not directly send into the incinerator burning, can reduce the quantity discharged of sulfurous gas in the fume emission, is about 100～200mg/Nm
3
(2) Molten sulphur in the molten sulfur storage tank is through behind the molten sulfur degasification, wherein H
2S concentration is down to below the 10 μ g/g, is conducive to reduce in the processes such as molten sulfur processing, storage, transportation hydrogen sulfide to the influence of operator and environment.
(3) degasification technique of the present invention does not need to use catalyzer, has effectively reduced solid pollution, and has reduced cost.
(4) Prometheanly adopted the rotary filler layer degassing, can guarantee that molten sulfur is uniformly distributed on the filler, the liquid film of formation can fully contact with air, thereby makes oxidation more complete.Simultaneously, adopt this structure not only simple, equipment manufacturing cost is low, running is steady, efficient energy-saving, and install for a short time, it is few to take up space.
(5) Prometheanly adopted the rotary filler layer degassing, can guarantee that molten sulfur is uniformly distributed on the filler, the liquid film of formation can fully contact with air, and is obvious to the Srteam Stripping effect of hydrogen sulfide in the molten sulfur.
(6) technological line of the present invention is reasonable, and Technology is safe and reliable.
Description of drawings
Fig. 1 is the schematic flow sheet of TGSD liquid sulphur degasification technique of the present invention.
Among the figure: 1-molten sulfur storage tank feeding line; 2-molten sulfur storage tank; The 3-molten sulfur advances the pump line; The 4-liquid sulfur pump; The 5-molten sulfur advances the tower line; 6-molten sulfur degasification tower; 7-molten sulfur sparger; The 8-rotary filler layer; 9-bubbling facility; 10-pressurized air feeding line; 11-molten sulfur trap; 12-gas goes out the tower line; The 13-molten sulfur goes out the tower line; The 14-variable-frequency motor.
Embodiment
The present invention will be further described below in conjunction with drawings and Examples.
Embodiment 1
Three grades of molten sulfur degasification devices as shown in Figure 1, comprise molten sulfur storage tank 2, liquid sulfur pump 4 and molten sulfur degasification tower 6, molten sulfur advances pump line 3 and connects molten sulfur storage tank 2 and liquid sulfur pump 4, molten sulfur advances tower line 5 and connects liquid sulfur pump 4 and molten sulfur degasification tower 6, molten sulfur degasification tower 6 inside arrange molten sulfur trap 11, molten sulfur sparger 7, rotary filler layer 8 and bubbling facility 9, molten sulfur trap 11 is arranged on the inner side-wall on molten sulfur degasification tower 6 tops, molten sulfur trap 11 connects gas and goes out tower line 12, gas goes out tower line 12 and connects reaction of Salmon-Saxl stove processed, molten sulfur advances tower line 5 and connects the molten sulfur sparger 7 that is positioned at molten sulfur trap 11 belows, molten sulfur sparger 7 is provided with the distribution hole, molten sulfur sparger 7 is rotated packing layer 8 parcels, rotary filler layer 8 is by variable-frequency motor 14 controls that are positioned at molten sulfur degasification tower 6 outside tops, bubbling facility 9 is positioned at the below of molten sulfur degasification tower 6 inside, bubbling facility 9 is connected with pressurized air feeding line 10, and molten sulfur degasification tower 6 bottoms connect molten sulfur and go out tower line 13.
From molten sulfur, remove the TGSD liquid sulphur degasification technique of hydrogen sulfide, spray the degassing, the bubbling degassing and catalytic oxidation and three grades of degassings of the stripping degassing through molten sulfur, with the hydrogen sulfide stripping in the molten sulfur, molten sulfur degasification tower operational condition is: working pressure 0.8MPa, 150 ℃ of service temperatures;
Comprise following operation steps:
1. molten sulfur sprays the degassing: molten sulfur evenly is sprayed onto in the rotary filler layer of degassing tower through the molten sulfur sparger, partly discharges hydrogen sulfide wherein;
The molten sulfur of sulfur recovery facility production is transported in the molten sulfur storage tank 2 through molten sulfur storage tank feeding line 1, molten sulfur advances pump line 3 through molten sulfur and enters liquid sulfur pump 4, boosting to 1.2Mpa advances tower line 5 through molten sulfur and sends into the molten sulfur sparger 7 that is arranged in the molten sulfur degasification tower 6, distribution hole on molten sulfur sparger 7 is sprayed onto rotary filler layer 8 inboards equably with molten sulfur, discharges hydrogen sulfide wherein;
2. the bubbling degassing: the molten sulfur pull-up was except the sulfide in the molten sulfur at the bottom of the pressurized air bubbling entered tower
0.85MPa the compressed air feed line 10 of pressurized air enters bubbling facility 9, bubbling in the molten sulfur layer, stir the molten sulfur layer, hydrogen sulfide in the molten sulfur is separated, oxygen in the pressurized air and the hydrogen sulfide in the molten sulfur, polysulfide generation oxidative decomposition further discharge the sulfide in the molten sulfur;
3. catalytic oxidation and the stripping degassing: through the abundant catalytic oxidation of rotation filler realization air and molten sulfur, decomposition removes sulfide
Pressurized air in molten sulfur layer at the bottom of the tower behind the bubbling, with the Molten sulphur that molten sulfur sparger 7 sprays, oxidizing reaction further takes place in the cross-flow contact on rotary filler layer 8, and wherein hydrogen polysulfide is further decomposed, and discharges more hydrogen sulfide;
The air that contains a small amount of hydrogen sulfide contacts with the molten sulfur cross-flow in rotary filler layer 8, and stripping removes the hydrogen sulfide in the molten sulfur.
Rotation filler material is stainless steel porous corrugated plate packing.
4. the overhead gas of H 2 S-containing gas enters sulphur unit reaction of Salmon-Saxl stove processed
Isolated gas captures through molten sulfur trap 11 and leaves degassing tower after removing the molten sulfur of carrying secretly in the gas in rotary filler layer 8, utilizes self pressure to go out tower line 12 through gas and enters reaction of Salmon-Saxl stove processed;
5. at the bottom of isolated molten sulfur enters tower in rotary filler layer 8, further remove wherein hydrogen sulfide through the air bubbling, degassing back molten sulfur is sent into the molten sulfur forming unit.
H in the molten sulfur after the degassing
2S concentration is down to 8 μ g/g, SO in the discharging flue gas
2Concentration can reduce 200mg/Nm
3
Embodiment 2
Three grades of molten sulfur degasification devices as shown in Figure 1, comprise molten sulfur storage tank 2, liquid sulfur pump 4 and molten sulfur degasification tower 6, molten sulfur advances pump line 3 and connects molten sulfur storage tank 2 and liquid sulfur pump 4, molten sulfur advances tower line 5 and connects liquid sulfur pump 4 and molten sulfur degasification tower 6, molten sulfur degasification tower 6 inside arrange molten sulfur trap 11, molten sulfur sparger 7, rotary filler layer 8 and bubbling facility 9, molten sulfur trap 11 is arranged on the inner side-wall on molten sulfur degasification tower 6 tops, molten sulfur trap 11 connects gas and goes out tower line 12, gas goes out tower line 12 and connects reaction of Salmon-Saxl stove processed, molten sulfur advances tower line 5 and connects the molten sulfur sparger 7 that is positioned at molten sulfur trap 11 belows, molten sulfur sparger 7 is provided with the distribution hole, molten sulfur sparger 7 is rotated packing layer 8 parcels, rotary filler layer 8 is by variable-frequency motor 14 controls that are positioned at molten sulfur degasification tower 6 outside tops, bubbling facility 9 is positioned at the below of molten sulfur degasification tower 6 inside, bubbling facility 9 is connected with pressurized air feeding line 10, and molten sulfur degasification tower 6 bottoms connect molten sulfur and go out tower line 13.
From molten sulfur, remove the TGSD liquid sulphur degasification technique of hydrogen sulfide, spray the degassing, the bubbling degassing and catalytic oxidation and three grades of degassings of the stripping degassing through molten sulfur, with the hydrogen sulfide stripping in the molten sulfur, molten sulfur degasification tower operational condition is: working pressure 0.1MPa, 135 ℃ of service temperatures;
Comprise following operation steps:
1. molten sulfur sprays the degassing: molten sulfur evenly is sprayed onto in the rotary filler layer of degassing tower through the molten sulfur sparger, partly discharges hydrogen sulfide wherein;
The molten sulfur of sulfur recovery facility production is transported in the molten sulfur storage tank 2 through molten sulfur storage tank feeding line 1, molten sulfur advances pump line 3 through molten sulfur and enters liquid sulfur pump 4, boosting to 0.15Mpa advances tower line 5 through molten sulfur and sends into the molten sulfur sparger 7 that is arranged in the molten sulfur degasification tower 6, distribution hole on molten sulfur sparger 7 is sprayed onto rotary filler layer 8 inboards equably with molten sulfur, discharges hydrogen sulfide wherein;
2. the bubbling degassing: the molten sulfur pull-up was except the sulfide in the molten sulfur at the bottom of the pressurized air bubbling entered tower
0.5MPa the compressed air feed line 10 of pressurized air enters bubbling facility 9, bubbling in the molten sulfur layer, stir the molten sulfur layer, hydrogen sulfide in the molten sulfur is separated, oxygen in the pressurized air and the hydrogen sulfide in the molten sulfur, polysulfide generation oxidative decomposition further discharge the sulfide in the molten sulfur;
3. catalytic oxidation and the stripping degassing: through the abundant catalytic oxidation of rotation filler realization air and molten sulfur, decomposition removes sulfide
Pressurized air in molten sulfur layer at the bottom of the tower behind the bubbling, with the Molten sulphur that molten sulfur sparger 7 sprays, oxidizing reaction further takes place in the cross-flow contact on rotary filler layer 8, and wherein hydrogen polysulfide is further decomposed, and discharges more hydrogen sulfide;
The air that contains a small amount of hydrogen sulfide contacts with the molten sulfur cross-flow in rotary filler layer 8, and stripping removes the hydrogen sulfide in the molten sulfur.
Rotation filler material is plastics porous plate filler.
4. the overhead gas of H 2 S-containing gas enters sulphur unit reaction of Salmon-Saxl stove processed
Isolated gas captures through molten sulfur trap 11 and leaves degassing tower after removing the molten sulfur of carrying secretly in the gas in rotary filler layer 8, utilizes self pressure to go out tower line 12 through gas and enters reaction of Salmon-Saxl stove processed;
5. at the bottom of isolated molten sulfur enters tower in rotary filler layer 8, further remove wherein hydrogen sulfide through the air bubbling, degassing back molten sulfur is sent into the molten sulfur storage element.
H in the molten sulfur after the degassing
2S concentration is down to 10 μ g/g, SO in the discharging flue gas
2Concentration can reduce 150mg/Nm
3
Embodiment 3
Three grades of molten sulfur degasification devices as shown in Figure 1, comprise molten sulfur storage tank 2, liquid sulfur pump 4 and molten sulfur degasification tower 6, molten sulfur advances pump line 3 and connects molten sulfur storage tank 2 and liquid sulfur pump 4, molten sulfur advances tower line 5 and connects liquid sulfur pump 4 and molten sulfur degasification tower 6, molten sulfur degasification tower 6 inside arrange molten sulfur trap 11, molten sulfur sparger 7, rotary filler layer 8 and bubbling facility 9, molten sulfur trap 11 is arranged on the inner side-wall on molten sulfur degasification tower 6 tops, molten sulfur trap 11 connects gas and goes out tower line 12, gas goes out tower line 12 and connects reaction of Salmon-Saxl stove processed, molten sulfur advances tower line 5 and connects the molten sulfur sparger 7 that is positioned at molten sulfur trap 11 belows, molten sulfur sparger 7 is provided with the distribution hole, molten sulfur sparger 7 is rotated packing layer 8 parcels, rotary filler layer 8 is by variable-frequency motor 14 controls that are positioned at molten sulfur degasification tower 6 outside tops, bubbling facility 9 is positioned at the below of molten sulfur degasification tower 6 inside, bubbling facility 9 is connected with pressurized air feeding line 10, and molten sulfur degasification tower 6 bottoms connect molten sulfur and go out tower line 13.
From molten sulfur, remove the TGSD liquid sulphur degasification technique of hydrogen sulfide, spray the degassing, the bubbling degassing and catalytic oxidation and three grades of degassings of the stripping degassing through molten sulfur, with the hydrogen sulfide stripping in the molten sulfur, molten sulfur degasification tower operational condition is: working pressure 0.5MPa, 140 ℃ of service temperatures;
Comprise following operation steps:
1. molten sulfur sprays the degassing: molten sulfur evenly is sprayed onto in the rotary filler layer of degassing tower through the molten sulfur sparger, partly discharges hydrogen sulfide wherein;
The molten sulfur of sulfur recovery facility production is transported in the molten sulfur storage tank 2 through molten sulfur storage tank feeding line 1, molten sulfur advances pump line 3 through molten sulfur and enters liquid sulfur pump 4, boosting to 0.6Mpa advances tower line 5 through molten sulfur and sends into the molten sulfur sparger 7 that is arranged in the molten sulfur degasification tower 6, distribution hole on molten sulfur sparger 7 is sprayed onto rotary filler layer 8 inboards equably with molten sulfur, discharges hydrogen sulfide wherein;
2. the bubbling degassing: the molten sulfur pull-up was except the sulfide in the molten sulfur at the bottom of the pressurized air bubbling entered tower
0.7MPa the compressed air feed line 10 of pressurized air enters bubbling facility 9, bubbling in the molten sulfur layer, stir the molten sulfur layer, hydrogen sulfide in the molten sulfur is separated, oxygen in the pressurized air and the hydrogen sulfide in the molten sulfur, polysulfide generation oxidative decomposition further discharge the sulfide in the molten sulfur;
3. catalytic oxidation and the stripping degassing: through the abundant catalytic oxidation of rotation filler realization air and molten sulfur, decomposition removes sulfide
Pressurized air in molten sulfur layer at the bottom of the tower behind the bubbling, with the Molten sulphur that molten sulfur sparger 7 sprays, oxidizing reaction further takes place in the cross-flow contact on rotary filler layer 8, and wherein hydrogen polysulfide is further decomposed, and discharges more hydrogen sulfide;
The air that contains a small amount of hydrogen sulfide contacts with the molten sulfur cross-flow in rotary filler layer 8, and stripping removes the hydrogen sulfide in the molten sulfur.
Rotation filler material is stainless steel porous corrugated plate packing.
4. the overhead gas of H 2 S-containing gas enters sulphur unit reaction of Salmon-Saxl stove processed
Isolated gas captures through molten sulfur trap 11 and leaves degassing tower after removing the molten sulfur of carrying secretly in the gas in rotary filler layer 8, utilizes self pressure to go out tower line 12 through gas and enters reaction of Salmon-Saxl stove processed;
5. at the bottom of isolated molten sulfur enters tower in rotary filler layer 8, further remove wherein hydrogen sulfide through the air bubbling, degassing back molten sulfur is sent into the molten sulfur forming unit.
H in the molten sulfur after the degassing
2S concentration is down to 8 μ g/g, SO in the discharging flue gas
2Concentration can reduce 180mg/Nm
3
Claims (8)
1. three grades of molten sulfur degasification devices, it is characterized in that comprising molten sulfur storage tank (2), liquid sulfur pump (4) and molten sulfur degasification tower (6), molten sulfur advances pump line (3) and connects molten sulfur storage tank (2) and liquid sulfur pump (4), molten sulfur advances tower line (5) and connects liquid sulfur pump (4) and molten sulfur degasification tower (6), molten sulfur degasification tower (6) inside arranges molten sulfur trap (11), molten sulfur sparger (7), rotary filler layer (8) and bubbling facility (9), molten sulfur trap (11) is arranged on the inner side-wall on molten sulfur degasification tower (6) top, molten sulfur trap (11) connects gas and goes out tower line (12), gas goes out tower line (12) and connects reaction of Salmon-Saxl stove processed, molten sulfur advances tower line (5) and connects the molten sulfur sparger (7) that is positioned at rotary filler layer (8) center, molten sulfur sparger (7) is provided with the distribution hole, rotary filler layer (8) is by variable-frequency motor (14) control that is positioned at the outside top of molten sulfur degasification tower (6), bubbling facility (9) is positioned at the inner below of molten sulfur degasification tower (6), bubbling facility (9) is connected with pressurized air feeding line (10), and molten sulfur degasification tower (6) bottom connects molten sulfur and goes out tower line (13).
2. three grades of liquid sulphur degasification techniques is characterized in that comprising that molten sulfur sprays the degassing, the bubbling degassing and catalytic oxidation and three grades of degassings of the stripping degassing, and concrete steps are as follows:
1. molten sulfur sprays the degassing: molten sulfur evenly is sprayed onto in the rotary filler layer of degassing tower through the molten sulfur sparger, partly discharges hydrogen sulfide wherein;
The molten sulfur that sulfur recovery facility is produced is transported in the molten sulfur storage tank (2) through molten sulfur storage tank feeding line (1), molten sulfur advances pump line (3) through molten sulfur and enters liquid sulfur pump (4), and advance tower line (5) through molten sulfur and send into the molten sulfur sparger (7) that is arranged in the molten sulfur degasification tower (6), distribution hole on molten sulfur sparger (7) is sprayed onto rotary filler layer (8) inboard equably with molten sulfur, discharges hydrogen sulfide wherein;
2. the bubbling degassing: the molten sulfur pull-up was except the sulfide in the molten sulfur at the bottom of the pressurized air bubbling entered tower
The compressed air feed line of pressurized air (10) enters bubbling facility (9), bubbling in the molten sulfur layer, stir the molten sulfur layer, hydrogen sulfide in the molten sulfur is separated, oxygen in the pressurized air and the hydrogen sulfide in the molten sulfur, polysulfide generation oxidative decomposition further discharge the sulfide in the molten sulfur;
3. catalytic oxidation and the stripping degassing: through the abundant catalytic oxidation of rotation filler realization air and molten sulfur, decomposition removes sulfide
Pressurized air in molten sulfur layer at the bottom of the tower behind the bubbling, the Molten sulphur with molten sulfur sparger (7) sprays goes up the cross-flow contact in rotary filler layer (8), and oxidizing reaction further takes place, and wherein hydrogen polysulfide is further decomposed, and discharges more hydrogen sulfide;
The air that contains a small amount of hydrogen sulfide contacts with the molten sulfur cross-flow in rotary filler layer (8), and stripping removes the hydrogen sulfide in the molten sulfur.
4. the overhead gas of H 2 S-containing gas enters sulphur unit reaction of Salmon-Saxl stove processed
Isolated gas captures through molten sulfur trap (11) and leaves degassing tower after removing the molten sulfur of carrying secretly in the gas in rotary filler layer (8), utilizes self pressure to go out tower line (12) through gas and enters reaction of Salmon-Saxl stove processed;
5. at the bottom of isolated molten sulfur enters tower in rotary filler layer (8), further remove wherein hydrogen sulfide through the air bubbling, degassing back molten sulfur is sent into molten sulfur forming unit or molten sulfur storage element.
3. three grades of liquid sulphur degasification techniques according to claim 2 boost to 0.13～1.2Mpa when it is characterized in that described molten sulfur through liquid sulfur pump (4).
4. three grades of liquid sulphur degasification techniques according to claim 2, the service temperature that it is characterized in that described molten sulfur degasification tower (6) is 120～157 ℃, the working pressure of molten sulfur degasification tower (6) is 0.1-0.8Mpa.
5. three grades of liquid sulphur degasification techniques according to claim 2 is characterized in that described compressed-air actuated pressure is 0.5-1.0Mpa.
6. three grades of liquid sulphur degasification techniques according to claim 2 is characterized in that being in the described rotary filler layer (8) stainless steel porous corrugated plate packing or plastics porous plate filler.
7. three grades of liquid sulphur degasification techniques according to claim 6 is characterized in that rotary filler layer (8) is driven by variable-frequency motor, and molten sulfur is sprayed to filler inside through the molten sulfur sparger, is implemented in the even distribution of filler inside by centrifugal force.
8. three grades of liquid sulphur degasification techniques according to claim 2 is characterized in that described molten sulfur trap (11) is made up of silk screen.
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| CN103935964A (en) * | 2014-05-06 | 2014-07-23 | 田晓良 | Underwater forming equipment and process of sulphur |
| CN110605109A (en) * | 2018-06-14 | 2019-12-24 | 中国石油天然气股份有限公司 | Catalyst for waste gas treatment of liquid sulfur degassing process, preparation method and application process |
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| CN103935964A (en) * | 2014-05-06 | 2014-07-23 | 田晓良 | Underwater forming equipment and process of sulphur |
| CN110605109A (en) * | 2018-06-14 | 2019-12-24 | 中国石油天然气股份有限公司 | Catalyst for waste gas treatment of liquid sulfur degassing process, preparation method and application process |
| CN110605109B (en) * | 2018-06-14 | 2022-05-10 | 中国石油天然气股份有限公司 | Catalyst for waste gas treatment of liquid sulfur degassing process, preparation method and application process |
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