摘要:
A desulfurization absorption tower, a method for setting up the same and a method for operating the same. The tower may include an internal anti-corrosion layer that may be used for contacting the flue gas and the desulfurization absorption liquid, may define the tower chamber, and may include stainless steel plate whose thickness is 1.0 mm to 6.0 mm. The tower body may include an external supporting layer that may be used for supporting the anti-corrosion layer and may include carbon steel. The supporting layer and the anti-corrosion layer may be designed to jointly bear a load, wherein the supporting layer may be designed to bear a large part of the load, and the anti-corrosion layer may be designed to bear a small part of the load.
摘要:
A method for processing an amine-based solvent contaminated by the introduction of sulfur oxides is provided. A potassium compound is introduced into a contaminated solvent, and the contaminated solvent is cooled so that a solubility of a potassium sulfate becomes less than a specified concentration of potassium sulfate. Further, an oxidizing agent is introduced into the contaminated solvent so that a potassium sulfite is oxidized to potassium sulfate. The potassium sulfate is filtered out, wherein a prepared solvent is formed. Further, a device for processing an amine-based, sulfur oxide-contaminated solvent is provided.
摘要:
Chlorite-like phyllosilicate materials are found useful as SOx sorbents. A novel process of sulfur oxide sorption is provided utilizing these layered materials as contact solids. Typical industrial applications include sulfur removal from fluid catalyst cracking process, cold-side combustion gas sulfur abatement and cleaner coal gasification.
摘要:
A method and apparatus for removing acid gases such as halogen acids and sulfur oxides from a hot flue gas by contacting the gas with a finely-divided, pre-moistened and partially-agglomerated, intimate mixture of a solid alkaline reagent and a deliquescent compound. The dry akaline reactang/deliquescent compound mix is pre-conditioned by exposure to a gas of controlled humidity for a time sufficient to cause partial liquefaction of the deliquescent compound. Contact at controlled humidity conditions may be effected in a treating vessel or in a transport duct prior to injection into the hot flue gas. Alternatively, the dispersed deliquescent compound may be separately liquefied prior to mixing with the alkaline solids. Liquefaction of the deliquescent compound is achieved by controlling the partial pressure of water vapor in the conditioning gas mixture at a level higher than the equilibrium vapor pressure of the liquefied deliquescent material or its highest hydrate. In these moistening methods, the ratio of deliquescent to alkaline solids feed rates is so adjusted as to avoid the buildup of wetted material on the duct walls.
摘要:
Process for purifying SO.sub.2 -containing gas comprising a first step of contacting said gas with an aqueous solution of an ammonium sulfite or an ammonium thiosulfate also containing ammonium sulfate, a second step of contacting the resulting solution with a H.sub.2 S-containing gas at 20.degree.-90.degree. C. to produce sulfur which is separated from the remaining solution, a third step of recyling 90 to 99.99% by volume of said remaining solution to the first step, and a fourth step of introducing 0.01 to 10% by volume of said remaining solution into a molten salt formed of ammonium sulfate and/or bisulfate so as to produce a gas containing SO.sub.2, ammonia, sulfur and steam, which is recycled to the first step.
摘要:
A gas treatment apparatus suitable for removing sulfur oxides and dust from gas streams is disclosed. The gas to be treated is conveyed through a conduit and past at least one nozzle positioned in fluid communicaton with the interior of the conduit. The nozzle injects an atomized solution, such as an alkali metal carbonate solution, into the gas. Solids formed by contacting the gas with the solution collect on the inner surface of a conical funnel-shaped portion of a hollow body. The hollow body includes a conduit portion in coaxial alignment with the hollow body. The solids are first removed from the hollow body by a screw conveyer positioned on the conical funnel-shaped portion and then withdrawn through a solids exit port. Gases formed by the contact of the gas with the injected solution are removed through a gas exit port in the hollow body and a gas passageway defined by the inner surface of the hollow body and the outer surface of the conduit portion.
摘要:
Process for through desulfurization of exhaust gas by treating the gas through the steps of absorption, double decomposition, oxidation, and alkali sulfate conversion.
摘要:
A process and composition for removing sulfur dioxide from combustion gases particularly those emitted from the burning of high sulfur coal. The gases are treated with a liquid composition comprising 1 to 10 pounds of ClO.sub.2 per hundred pounds of SO.sub.2 to be treated and from 5 to 40 pounds of detergent per pound of ClO.sub.2. The composition is preferably alkaline, and may be injected as an atomized spray into the stack carrying gases, to preferably produce a stack gas of a pH between 7.0 and 7.5. The composition may also include 0.1 to 40 pounds of alkali per pound of ClO.sub.2 and 0.1 to 20 pounds of ammonia per pound of ClO.sub.2. Additionally, 1 to 30 pounds of an organic solvent per pound of ClO.sub.2 may be added.
摘要:
REDUCING THE OXIDES OF NITROGEN FORMED DURING THE OXIDATION OF A SOURCE OF SULFUR WHICH CONTAINS NITROGEN COMPOUNDS TO INERT NITROGEN ALLOWS CONTAMINANT-FREE RECOVERY OF SULFUR DIOXIDE FROM THE PROCESS GAS STREAM OR ALLOWS THE PROCESS GAS STREAM TO BE DIRECTLY UTILIZED FOR THE PRODUCTION OF CONTAMINANT-FREE DERIVATIVES OF SULFUR
DIOXIDE, SUCH AS SULFUR TRIOXIDE, SULFURIC ACID, AND THE SULFATES.
摘要:
PROCESS AND APPARATUS FOR THE RECOVERY OF SULFUR DIOXIDE FROM SO2-CONTAINING GASES IN A SYSTEM INVOLVING CONTACTING THE GAS WITH AN AQUEOUS SULFITE SOLUTION TO PRODUCE A SOLUTION OF THE CORRESPONDING BISULFITE WHICH IS A PRECURSOR OF SO2 AND SUBSEQUENTLY SEPARATING THE BISULFITE AND SO2-PARTIAL PRESSURE LOWING MATERIALS TO OBTAIN PURER BISULFITE WHICH IS THEN DECOMPOSED TO REGENERATE SULFUR DIOXIDE. EXAMPLES OF SULFITES INCLUDE POTASSIUM, CESIUM, AND RUBIDIUM SULFITES. IN THE PROCESS SEPARATION OF THE BISULFITE IS ACCOMPLISHED BY VAPORIZATION OF WATER FROM THE BISULFITE-CONTAINING SOLUTION, E.G. IN A FLASH CHAMBER TO SUPERSATURATE THE SOLUTION AND PRECIPITATE THE BISULFITE, E.G. IN AN AMOUNT EQUIVALENT TO THE AMOUNT OF THE SULFUR DIOXIDE REMOVED FROM THE WASTE GASES. CONDITIONS ARE CHOSEN TO PRECIPITATE CRYSTALS HAVING A SIZE SUITABLE FOR VACUUM DRUM FILTERING. THE CRYSTALS ARE ADVANTAGEOUSLY REDISSOLVED PRIOR TO HEATING TO REGENERATE THE SULFUR DIOXIDE AND A PORTION OF THIS SOLUTION IS USED TO WASH THE CRYSTALS ON THE DRUM FILTER AND IMPROVE THE PURITY THEREOF.