CN105129742A - Method for preparing calcium sulphide by decomposing phosphogypsum through hydrogen sulfide tail gas - Google Patents
Method for preparing calcium sulphide by decomposing phosphogypsum through hydrogen sulfide tail gas Download PDFInfo
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- CN105129742A CN105129742A CN201510544742.5A CN201510544742A CN105129742A CN 105129742 A CN105129742 A CN 105129742A CN 201510544742 A CN201510544742 A CN 201510544742A CN 105129742 A CN105129742 A CN 105129742A
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- Prior art keywords
- phosphogypsum
- tail gas
- decomposing
- hydrogen sulfide
- sulfurated lime
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- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 title claims abstract description 70
- 239000007789 gas Substances 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 31
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 229910000037 hydrogen sulfide Inorganic materials 0.000 title claims abstract description 16
- AGVJBLHVMNHENQ-UHFFFAOYSA-N Calcium sulfide Chemical compound [S-2].[Ca+2] AGVJBLHVMNHENQ-UHFFFAOYSA-N 0.000 title abstract 2
- JNVCSEDACVAATK-UHFFFAOYSA-L [Ca+2].[S-]SSS[S-] Chemical compound [Ca+2].[S-]SSS[S-] JNVCSEDACVAATK-UHFFFAOYSA-L 0.000 claims description 33
- 229940051851 sulfurated lime Drugs 0.000 claims description 30
- 229910052739 hydrogen Inorganic materials 0.000 claims description 14
- 239000000843 powder Substances 0.000 claims description 12
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 10
- 238000007605 air drying Methods 0.000 claims description 5
- 238000013467 fragmentation Methods 0.000 claims description 5
- 238000006062 fragmentation reaction Methods 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 5
- 238000012216 screening Methods 0.000 claims description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract description 10
- 239000002994 raw material Substances 0.000 abstract description 8
- 239000000126 substance Substances 0.000 abstract description 8
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 7
- 239000005864 Sulphur Substances 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000002829 reductive effect Effects 0.000 abstract description 6
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 abstract description 6
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 239000002910 solid waste Substances 0.000 abstract description 4
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 3
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 abstract description 3
- JGIATAMCQXIDNZ-UHFFFAOYSA-N calcium sulfide Chemical compound [Ca]=S JGIATAMCQXIDNZ-UHFFFAOYSA-N 0.000 abstract 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 abstract 1
- 229910052979 sodium sulfide Inorganic materials 0.000 abstract 1
- 238000000354 decomposition reaction Methods 0.000 description 16
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 12
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 12
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 12
- 239000002699 waste material Substances 0.000 description 7
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 6
- 235000011132 calcium sulphate Nutrition 0.000 description 6
- 239000011521 glass Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000003546 flue gas Substances 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 239000001175 calcium sulphate Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000006477 desulfuration reaction Methods 0.000 description 3
- 230000023556 desulfurization Effects 0.000 description 3
- 239000010440 gypsum Substances 0.000 description 3
- 229910052602 gypsum Inorganic materials 0.000 description 3
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 3
- 238000010183 spectrum analysis Methods 0.000 description 3
- 238000004448 titration Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000012265 solid product Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- CJDPJFRMHVXWPT-UHFFFAOYSA-N barium sulfide Chemical compound [S-2].[Ba+2] CJDPJFRMHVXWPT-UHFFFAOYSA-N 0.000 description 1
- AYJRCSIUFZENHW-DEQYMQKBSA-L barium(2+);oxomethanediolate Chemical compound [Ba+2].[O-][14C]([O-])=O AYJRCSIUFZENHW-DEQYMQKBSA-L 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000002686 phosphate fertilizer Substances 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Abstract
The invention discloses a method for preparing calcium sulphide by decomposing phosphogypsum through hydrogen sulfide tail gas, and belongs to the field of phosphogypsum resource utilization. The phosphogypsum is dried and ground so that the phosphogypsum can be reduced and decomposed under Co and H2S tail gas to prepare CaS, decomposing temperature is 700-950 DEG C, the decomposing rate of the phosphogypsum is larger than and equal to 95%, and the productivity of calcium sulfide can reach over 85%. The production process is simple and easy to implement, the raw material is a large amount of the solid waste phosphogypsum, the prepared calcium sulfide can be used for preparing thiourea, sodium sulfide, sulphur, sulfuric acid and other chemical products and can also be used in the industries such as environmental protection and heavy metal treatment, and a new concept is provided for comprehensive utilization of the phosphogypsum.
Description
Technical field
The present invention discloses a kind of method that hydrogen sulfide tail gas decomposing phosphogypsum produces sulfurated lime, phosphorous chemical industry processing technology field, i.e. phosphogypsum resource utilization field.
Background technology
Phosphogypsum is the industrial solid castoff produced in production process of phosphoric acid, and its main component is CaSO
42H
2o.Along with the fast development of phosphorous chemical industry, the generation of phosphogypsum sharply increases, often produce 1t phosphoric acid and about discharge 5t phosphogypsum, the phosphogypsum that the whole world is discharged every year reaches 1.5 hundred million more than t, domestic annual phosphogypsum quantity discharged is close to 5,000 ten thousand t, only Yunnan Province just reaches 1,000 ten thousand t/a, and China, as the large production of phosphate fertilizer state of the first in the world, is also first phosphogypsum by-product state simultaneously.In Wet-process phosphoric acid (WPPA), often produce 1t phosphoric acid and consume sulfuric acid 2.5-2.8t, produce 5t phosphogypsum.Phosphogypsum is stacked and is taken a large amount of soil, after rainwater soaks, and solubility P wherein
2o
5with the objectionable constituent such as fluorochemical by water body Environmental diffusion infiltration towards periphery, cause severe contamination to soil, water, air, the accumulation of phosphogypsum brings very large pressure to environment.Therefore, the process of phosphogypsum and resource utilization problem very urgent.At present, ardealite innocent process and comprehensive utilization become the study hotspot in solid waste process disposal and resource utilization field, be also phosphorous chemical industry sustainable development in the urgent need to.
Prior art have studied the method for some phosphogypsums comprehensive utilization, phosphogypsum prepare sulfurated lime one of them, sulfurated lime is of many uses, can be used for preparing the Chemicals such as thiocarbamide, Sodium Sulphide, sulphur, sulfuric acid, phosphorescent substance can be done, luminescent material, also can be used in the industry such as medicine, environmental protection, heavy metal process.So be the outlet that raw material prepares that sulfurated lime is the calcium made full use of in solid waste phosphogypsum, Sulphur ressource with phosphogypsum.Produce sulfurated lime with phosphogypsum, not only can consume phosphogypsum on a large scale to slow down the pressure of phosphorus chemical industry and to alleviate the impact of phosphogypsum on ecotope, and very high economical benefit can be produced.
Hydrogen sulfide (H2S) is a kind of colourless toxic gas having rotten egg smell, and environmental pollution is very serious.In selexol process, the desulfurization of methanol device resurgent gases, be raw material production synthetic ammonia with residual oil, be that raw material carborization is produced in the process such as catalysis drying gas desulfurization, liquid hydrocarbon desulfurization, sour water stripping of barium carbonate, petroleum drilling and refinery and usually produced some hydrogen sulfide containing sour gas with barium sulphide.During process sulfide hydrogen waste gas, other compounds utilizable must be transferred in absorption or regenerative process, and be unlikely to cause secondary pollution.At present, the industrial catalytic oxidation that generally adopts is converted into sulphur by Cross unit hydrogen sulfide.
In this experiment topic group in three-phase fluidized bed carbonating ardealite decompose slag project in also create hydrogen sulfide containing tail gas, because hydrogen sulfide is reducing gas, carry out reducing and decomposing phosphogypsum with it and produce sulfurated lime, realize the treatment of wastes with processes of wastes against one another, the cyclic utilization of waste.Directly by H
2s tail gas and phosphogypsum carry out reaction effectively can not be reduced to sulfurated lime by phosphogypsum, and does not also have corresponding prior art open.
Summary of the invention
The technical problem to be solved in the present invention is: not by H in prior art
2the effective ways that S tail gas and phosphogypsum fully utilize, and directly use H
2phosphogypsum effectively can not be reduced to sulfurated lime by S tail gas.
The object of the present invention is to provide a kind of hydrogen sulfide tail gas decomposing phosphogypsum to produce the method for sulfurated lime, specifically comprise the following steps:
(1) phosphogypsum is through natural air drying, fragmentation, grinding, screening, obtains phosphogypsum powder;
(2) the phosphogypsum powder that step (1) obtains is placed in tube furnace, then passes into CO and H
2s tail gas, wherein the gas flow rate of CO is 8-10ml/min, H
2the flow velocity of S tail gas is 72-90ml/min, reacts and obtain sulfurated lime in 1-1.5 hour at 800-950 DEG C.
Preferably, the granularity of the described phosphogypsum powder of step (1) is 100-120 order.
Preferably, volume percent content>=99.9% of CO, H
2h in S tail gas
2volume percent content>=5% of S.
SO in furnace gas is detected by flue gas analyzing apparatus on-line continuous in reaction process of the present invention
2volumn concentration, until react completely, stops heat reduction decomposing furnace, output SO
2the furnace gas of volumn concentration>=10%, with the solid product of CaS mass percentage more than 85%, furnace gas is through the concentrated unstripped gas that can be used as in double conversion double absorption process for preparing sulfuric acid process, solid product can be used for preparing the Chemicals such as thiocarbamide, Sodium Sulphide, sulphur, sulfuric acid, also can be used in the industry such as environmental protection, heavy metal process, or the ultrapure sulfurated lime of a progressive synthesis.In whole process, no waste produces, decomposing ardealite rate >=95%.
Phosphogypsum of the present invention is produced solid waste by Wet Processes of Phosphoric Acid, and its main component is as shown in table 1:
Table 1: the mass percent of phosphogypsum raw material main ingredient
Beneficial effect of the present invention:
(1) H of the present invention
2s tail gas reducing and decomposing phosphogypsum prepares the method for sulfurated lime, simple for process, accomplishes " treatment of wastes with processes of wastes against one another ", utilization of waste material, by H
2s tail gas leads in decomposing furnace, and one is the reductibility enhanced in reaction system, and two are the reduction of H
2the vent gas treatment of S tail gas;
(3) H of the present invention
2s tail gas reducing and decomposing phosphogypsum prepares the method for sulfurated lime, rate of decomposition>=95% of phosphogypsum, production rate>=85% of sulfurated lime, and phosphogypsum must not carry out pre-treatment;
(4) the of the present invention pair of reducing atmosphere reducing and decomposing phosphogypsum prepares the method for sulfurated lime, and object is the recycling realizing phosphogypsum; Develop potential calcium, Sulphur ressource, also form phosphoric acid by wet process enterprise industry chain of circular economy simultaneously, achieve phosphogypsum comprehensive utilization, alleviate the present situation of China's Sulphur ressource shortage.
Embodiment
The present invention is done full and clear further below in conjunction with embodiment, but scope is not limited to described content.
embodiment 1
Hydrogen sulfide tail gas decomposing phosphogypsum described in the present embodiment produces the method for sulfurated lime with CO and H
2s tail gas is reducing atmosphere; Wherein the percentage composition of CO is 99.9%, H
2h in S tail gas
2the percentage composition of S is 10%, and wherein the gas flow rate of CO is 8ml/min, H
2the gas flow rate of S tail gas is 72ml/min; Specifically comprise the following steps:
(1) phosphogypsum is through natural air drying, fragmentation, grinding, screening, and obtaining granularity is 100 object phosphogypsum powder;
(2) phosphogypsum powder is placed in tube furnace reduction decomposition, passes into CO and H
2the mixed gas of S tail gas makees reductive agent, controls furnace temperature 800 DEG C, detects SO in furnace gas by flue gas analyzing apparatus on-line continuous
2volumn concentration, SO
2volumn concentration is 5%-8%, (react 1.5 hours) until react completely, stop heated Tube-furnace, naturally cool to room temperature, measure the content of sulfurated lime (CaS) with the sub-methyl blue spectrum analysis of defined in national standard SL89-1994, adopt the EDTA titrimetry CaO in GB/T176-2008.Adopt and improve gravimetric determination CaSO
4rate of decomposition, namely with improving CaSO in gravimetric determination raw material phosphor gypsum
4caSO in content Sum decomposition slag
4content, then calculate the rate of decomposition of phosphogypsum.The mensuration formula of calcium sulphate content is:
In formula: G1 is that glass pot adds barium sulfate quality;
G2 is glass pot quality;
M is alleged sample thief quality;
0.5831 is scaled the coefficient of calcium sulfate for barium sulfate.
Rate of decomposition according to following formulae discovery phosphogypsum:
Calculating decomposing ardealite rate is by analysis 82%, the content 71.2% of sulfurated lime.
embodiment 2
Hydrogen sulfide tail gas decomposing phosphogypsum described in the present embodiment produces the method for sulfurated lime with CO and H
2s tail gas is reducing atmosphere; Wherein the percentage composition of CO is 99.9%, H
2h in S tail gas
2the percentage composition of S is 15%,
Wherein the gas flow rate of CO is 9ml/min, H
2the gas flow rate of S tail gas is 81ml/min; Specifically comprise the following steps:
(1) phosphogypsum is through natural air drying, fragmentation, grinding, screening, and obtaining granularity is 110 object phosphogypsum powder;
(2) phosphogypsum powder is placed in tube furnace reduction decomposition, passes into CO and H
2the mixed gas of S tail gas makees reductive agent, controls furnace temperature 900 DEG C, detects SO in furnace gas by flue gas analyzing apparatus on-line continuous
2volumn concentration, SO
2volumn concentration is 8%-10%, (react 1.2 hours) until react completely, stop heated Tube-furnace, naturally cool to room temperature, measure the content of sulfurated lime (CaS) with the sub-methyl blue spectrum analysis of defined in national standard SL89-1994, adopt the EDTA titrimetry CaO in GB/T176-2008.Adopt and improve gravimetric determination CaSO
4rate of decomposition, namely with improving CaSO in gravimetric determination raw material phosphor gypsum
4caSO in content Sum decomposition slag
4content, then calculate the rate of decomposition of phosphogypsum.The mensuration formula of calcium sulphate content is:
In formula: G1 is that glass pot adds barium sulfate quality;
G2 is glass pot quality;
M is alleged sample thief quality;
0.5831 is scaled the coefficient of calcium sulfate for barium sulfate.
Rate of decomposition according to following formulae discovery phosphogypsum:
Calculating decomposing ardealite rate is by analysis 88%, the content 77.8% of sulfurated lime.
embodiment 3
Hydrogen sulfide tail gas decomposing phosphogypsum described in the present embodiment produces the method for sulfurated lime with CO and H
2s tail gas is reducing atmosphere; Wherein the percentage composition of CO is 99.9%, H
2h in S tail gas
2the percentage composition of S is 15%,
Wherein the gas flow rate of CO is 10ml/min, H
2the gas flow rate of S tail gas is 90ml/min; Specifically comprise the following steps:
(1) phosphogypsum is through natural air drying, fragmentation, grinding, screening, and obtaining granularity is 120 object phosphogypsum powder;
(2) phosphogypsum powder is placed in tube furnace reduction decomposition, passes into CO and H
2the mixed gas of S tail gas makees reductive agent, controls furnace temperature 950 DEG C, detects SO in furnace gas by flue gas analyzing apparatus on-line continuous
2volumn concentration, SO
2volumn concentration is 9%-11%, (react 1 hour) until react completely, stop heated Tube-furnace, naturally cool to room temperature, measure the content of sulfurated lime (CaS) with the sub-methyl blue spectrum analysis of defined in national standard SL89-1994, adopt the EDTA titrimetry CaO in GB/T176-2008.Adopt and improve gravimetric determination CaSO
4rate of decomposition, namely with improving CaSO in gravimetric determination raw material phosphor gypsum
4caSO in content Sum decomposition slag
4content, then calculate the rate of decomposition of phosphogypsum.The mensuration formula of calcium sulphate content is:
In formula: G1 is that glass pot adds barium sulfate quality;
G2 is glass pot quality;
M is alleged sample thief quality;
0.5831 is scaled the coefficient of calcium sulfate for barium sulfate.
Rate of decomposition according to following formulae discovery phosphogypsum:
Calculating decomposing ardealite rate is by analysis 95%, the content 85.4% of sulfurated lime.
Comparative example
The present embodiment concrete grammar and step are with embodiment 2, and difference is only with H
2s tail gas is as reducing gas, and calculating decomposing ardealite rate is by analysis 60%, the content 40% of sulfurated lime.
Claims (3)
1. hydrogen sulfide tail gas decomposing phosphogypsum produces a method for sulfurated lime, it is characterized in that, specifically comprises the following steps:
(1) phosphogypsum obtains phosphogypsum powder through natural air drying, fragmentation, grinding, screening;
(2) the phosphogypsum powder that step (1) obtains is placed in stove, then passes into CO and H
2s tail gas, wherein the gas flow rate of CO is 8-10ml/min, H
2the flow velocity of S tail gas is 72-90ml/min, reacts and obtain sulfurated lime in 1-1.5 hour at 800-950 DEG C.
2. hydrogen sulfide tail gas decomposing phosphogypsum produces the method for sulfurated lime according to claim 1, it is characterized in that: the granularity of the described phosphogypsum powder of step (1) is 100-120 order.
3. hydrogen sulfide tail gas decomposing phosphogypsum produces the method for sulfurated lime according to claim 1, it is characterized in that: volume percent content>=99.9% of CO, H
2h in S tail gas
2volume percent content>=5% of S.
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| CN107774114A (en) * | 2017-10-25 | 2018-03-09 | 昆明理工大学 | A kind of method that carbon dioxide is trapped using decomposing ardealite slag |
| CN109809456A (en) * | 2019-03-13 | 2019-05-28 | 山东大学 | A kind of system and method for coal gasification collaboration gypsum calcining coproduction calcium oxide and sulphur |
| CN114684793A (en) * | 2022-05-20 | 2022-07-01 | 黔南民族师范学院 | Method for preparing elemental sulfur from titanium gypsum, titanium white waste acid and yellow phosphorus tail gas |
| RU2814843C1 (en) * | 2023-07-11 | 2024-03-05 | федеральное государственное бюджетное образовательное учреждение высшего образования "Южно-Российский государственный политехнический университет (НПИ) имени М.И. Платова" | Method of producing calcium sulphide from phosphogypsum |
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| CN107774114B (en) * | 2017-10-25 | 2021-07-16 | 昆明理工大学 | Method for capturing carbon dioxide by using phosphogypsum decomposition slag |
| CN109809456A (en) * | 2019-03-13 | 2019-05-28 | 山东大学 | A kind of system and method for coal gasification collaboration gypsum calcining coproduction calcium oxide and sulphur |
| CN109809456B (en) * | 2019-03-13 | 2021-02-26 | 山东大学 | System and method for co-producing calcium oxide and sulfur by coal gasification and gypsum calcination |
| CN114684793A (en) * | 2022-05-20 | 2022-07-01 | 黔南民族师范学院 | Method for preparing elemental sulfur from titanium gypsum, titanium white waste acid and yellow phosphorus tail gas |
| RU2814843C1 (en) * | 2023-07-11 | 2024-03-05 | федеральное государственное бюджетное образовательное учреждение высшего образования "Южно-Российский государственный политехнический университет (НПИ) имени М.И. Платова" | Method of producing calcium sulphide from phosphogypsum |
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