SU237814A1 - - Google Patents
Info
- Publication number
- SU237814A1 SU237814A1 SU1154255A SU1154255A SU237814A1 SU 237814 A1 SU237814 A1 SU 237814A1 SU 1154255 A SU1154255 A SU 1154255A SU 1154255 A SU1154255 A SU 1154255A SU 237814 A1 SU237814 A1 SU 237814A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- solution
- distillation
- absorption
- mol
- ammonium phosphate
- Prior art date
Links
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 11
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 6
- 238000004821 distillation Methods 0.000 description 6
- 239000004254 Ammonium phosphate Substances 0.000 description 5
- 229910000148 ammonium phosphate Inorganic materials 0.000 description 5
- 235000019289 ammonium phosphates Nutrition 0.000 description 5
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 description 5
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 4
- 235000010269 sulphur dioxide Nutrition 0.000 description 4
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 229910019142 PO4 Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- WQDSRJBTLILEEK-UHFFFAOYSA-N sulfurous acid Chemical compound OS(O)=O.OS(O)=O WQDSRJBTLILEEK-UHFFFAOYSA-N 0.000 description 2
- AOSFMYBATFLTAQ-UHFFFAOYSA-N 1-amino-3-(benzimidazol-1-yl)propan-2-ol Chemical compound C1=CC=C2N(CC(O)CN)C=NC2=C1 AOSFMYBATFLTAQ-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000001256 steam distillation Methods 0.000 description 1
Landscapes
- Fertilizers (AREA)
Description
Изобретение касаетс очистки отход щих газов от сернистото ангидрида.The invention relates to the purification of exhaust gases from sulfurous anhydride.
Известен способ извлечени двуокиси серы из отход щих газов в результате поглощени его сульфит-бисульфитным раствором с последующей отгонкой паром.A known method for extracting sulfur dioxide from flue gases is the result of its absorption by a sulphite-bisulphite solution, followed by steam stripping.
С целью одновременного получени концентрированного удобрени фосфата аммони и уменьщени расхода пара дл отгонки предлагаетс в раствор, получеппый после абсорбции , вводить фосфорную кислоту в количестве , эквивалентном содержанию сульфита в растворе, дл перевода непрореагировавщего сульфита в бисульфит. Это способствует увеличению упругости двуокиси серы над раствором и соответственно упрощает ее отгонку. Образующийс при этом фосфат аммони кристаллизуют из охлажденного раствора после достижени предела его растворимости.In order to simultaneously obtain concentrated ammonium phosphate fertilizer and reduce steam consumption for distillation, it is proposed to introduce phosphoric acid in an amount equivalent to the sulfite content in the solution, to convert unreacted sulfite to bisulfite, into the solution obtained after absorption. This helps to increase the elasticity of sulfur dioxide over the solution and accordingly simplifies its distillation. The ammonium phosphate thus formed crystallizes from the cooled solution after reaching its solubility limit.
Пример. Дл поглощени 1 т сернистого алгидрида из газа с содержанием 0,3% SOa подают 15,6 м сульфит-бисульфитного раствора состава, мол/л:Example. To absorb 1 t of sulfurous alhydride from a gas with a content of 0.3% SOa, a 15.6 m sulphite-bisulphite solution of the composition, mol / l, is supplied:
S023,5S023,5
NHacyM6,5NHacyM6,5
РО41,5PO41.5
S02: МНзэф0,7.S02: Mnzef0,7.
ННзэф - аммиак, наход щийс в растворе в виде сульфита и бисульфита аммони . На абсорбцию подают 120000 нм газа.HNZeff — ammonia, which is in solution in the form of sulfite and ammonium bisulfite. 120,000 nm of gas are fed to absorption.
Состав раствора после абсорбции, мол/л: SOa4,5The composition of the solution after absorption, mol / l: SOa4,5
NHs cvM6,5NHs cvM6,5
РО4 1,5PO4 1.5
502:КШзэф0,9.502: Kshzef0.9.
К этому раствору добавл ют фосфорную кислоту в количестве 0,5 мол/л.Phosphoric acid in the amount of 0.5 mol / l is added to this solution.
Далее раствор раздел ют на две равные части , из которых одна поступает в отстойный холодильник - кристаллизатор, в котором отдол юг криста.тль фосфата аммони . ОсветЛС1П1ЫЙ pacTBOj) после кристаллизатора соедип юг с другоГ частью раствора и подают в тсилооб.менник отгонной колонны.Next, the solution is divided into two equal parts, one of which enters the settling cooler - a crystallizer, in which there is a crust south of ammonium phosphate. Clarifier pacTBOj) after the crystallizer connect the south with the other part of the solution and serve in the distillation column distiller column.
Состав раствора, ноступающего на отгонку, мол/л:The composition of the solution, entering the distillation, mol / l:
SOa4,5SOa4,5
NHscvM6,0NHscvM6,0
РО4 1,5PO4 1.5
SOsrNnso,,,1,0.SOsrNnso ,,, 1,0.
При отгонке выдел етс 1 т 100% SO2, аOn distillation, 1 t of 100% SO2 is released, and
раствор охлаждают, добавл ют к нему амми0 ,5 мол/л и вновь подают наthe solution is cooled, ammonium0.5 mol / l is added to it and again fed to
ак в количестве абсорбцию.ak in the amount of absorption.
2525
Предмет изобретени Subject invention
Способ извлечепи сернистого ангирида из 3 отгонкой паром, отличающийс тем, что, с целью одновременного получени фосфата аммони и уменьшени расхода пара дл отгонки, в раствор, полученный после аб4 сорбции, ввод т фосфорную кислоту в количестве , эквивалентном содержанию сульфита в растворе, а образующийс фосфат аммони кристаллизуют из охлажденного раствора.The method of extracting sulfurous anhydride from 3 by steam distillation, characterized in that, in order to simultaneously obtain ammonium phosphate and reduce the steam consumption for distillation, phosphoric acid in an amount equivalent to the content of sulfite in the solution is introduced into the solution obtained after absorption, ammonium phosphate is crystallized from the cooled solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1154255A SU237814A1 (en) | 1967-04-29 | 1967-04-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1154255A SU237814A1 (en) | 1967-04-29 | 1967-04-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU237814A1 true SU237814A1 (en) | 1974-08-25 |
Family
ID=20440550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU1154255A SU237814A1 (en) | 1967-04-29 | 1967-04-29 |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU237814A1 (en) |
-
1967
- 1967-04-29 SU SU1154255A patent/SU237814A1/ru active
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