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7351387 |
Method for removing impurities accumulated in a scrubbing fluid
A method for removing impurities accumulated in a scrubbing fluid in a flue gas scrubber and effluents from the scrubber. The flue gases are scrubbed with a scrubbing fluid that includes a...
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7153481 |
Method and device for separating sulphur dioxide from a gas
A device ( 1 ) for separating sulphur dioxide from a gas ( 4 ) by means of an absorption liquid has an inlet ( 2 ) for gas ( 4 ) containing sulphur dioxide, an outlet ( 18 ) for gas ( 16 ), from...
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7094382 |
Method and a device for the separation of sulphur dioxide from a gas
A device ( 1 ) for separating sulphur dioxide from a gas has an inlet ( 2 ) for the gas ( 4 ) and an outlet ( 42 ) for gas ( 40 ), from which sulphur dioxide has been separated. An apertured plate...
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6932952 |
Method and apparatus for wet type flue-gas desulfurization
A wet type exhaust gas desulfurization method includes sucking liquid in a liquid reservoir containing a sulphur compound formed from sulphur dioxide contained in exhaust gas so as to form a flow...
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6863875 |
Flue gas treating system and process
In a flue gas treating system, an absorption tower ( 21 ), a reheating section ( 22 ) and a fan ( 23 ) are arranged in line on a vertical axis so as to function as at least a part of a stack for...
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6793740 |
Method for cleaning pressurized containers containing moisture sensitive chemicals
The present invention relates to a method for cleaning a pressurized container having at least one chemical contained therein. The pressurized container may be any type of container able to store...
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6572832 |
Method of removing sulfur dioxide from a gaseous stream in a wet scrubbing unit
Sulfur dioxide is removed from a gaseous stream using an aqueous scrubbing slurry of magnesium and calcium scrubbing components where the process is carried out where lime and magnesium hydroxide...
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6555082 |
Method for wet flue gas desulfurization and device for implementing said method
A method and apparatus for wet flue gas desulfurization in a two-circuit washer having two washers for an absorption agent based on suspensions containing calcium compounds, a sump for supplying...
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6254843 |
Process for the reclamation of calcium sulfite produced by a calcium-based FGD system
A method of producing calcium sulfate with a flue gas scrubbing facility having a gas-liquid contactor that uses a calcium-based slurry to absorb sulfur dioxide from a flue gas containing acidic...
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6126910 |
Method for removing acid gases from flue gas
A method is provided for removing contaminants, such as sulfur trioxide, sulfur dioxide and hydrogen halides, out of a gas, such as an exhaust gas from a coal or oil fired burner, by injecting a...
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6099816 |
Process for desulfurizing a sulfur-dioxide containing gas
A desulfurization process using magnesium sulfites in a clear solution has the discharge from a wet scrubbing unit passed to a reaction tank. A silica-containing solid particulate material, such as...
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6030494 |
Method of treating melodorous gases of a pulp mill
A method is provided for reducing emissions of harmful nitrogen compounds from a pulp mill (e.g. kraft mill) having malodorous gases which include ammonia and reduced sulphur compounds therein. The...
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5660616 |
Method and device with a gas layered sieve plate for wet desulfurization from flue gas
A method and a device for wet desulfurization of flue gas to remove a sulfur dioxide(SO 2 ) contained in flue gas discharged from thermal power stations and boilers are disclosed. In the method the...
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5614158 |
Process for removing sulfur dioxide from gases and producing gypsum and purified magnesium hydroxide
In a process for removing sulfur dioxide from a gas stream using an aqueous solution of magnesium scrubbing components and subsequent oxidation of the magnesium sulfite produced which is...
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5605552 |
Wet type flue gas desulfurization apparatus
A wet type flue gas desulfurization apparatus in which desulfurization of flue gas is carried out through gas/liquid phase contact of flue gas with an absorbent slurry. More particularly, disclosed...
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5458744 |
Process to produce hydrogen and/or hemihydrate calcium sulphate from calcium sulphite
A process for producing hydrogen and/or hemihydrate calcium sulphate from calcium sulphite. Waste solid containing calcium sulphite and other calcium salts is treated by the addition of aqueous...
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5403568 |
Horizontal wet scrubbing apparatus and method for removing sulfur dioxide from a gaseous stream
A horizontal wet scrubbing apparatus and method for removing sulfur dioxide from hot flue gases. The apparatus has a horizontally disposed housing through which the hot flue gases are passed, and...
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5366716 |
Method for recovering sulphur dioxide from the chemical circulation of a sulphate pulp mill
Sulphur dioxide is separated from the flue gases of a cellulose pulp mill by absorbing it into a sodium sulphite solution. Sulphur dioxide is regenerated from the sodium bisulphite solution...
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5312609 |
Method of sulfur dioxide removal from gaseous streams with α-hemihydrate gypsum product formation
A method is provided for removing sulfur dioxide from a hot gaseous stream while directly producing α-hemihydrate gypsum from a scrubber effluent. A portion of an aqueous scrubbing medium...
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5310498 |
Sulfur dioxide removal from gases using a modified lime
A wet scrubbing process for removing sulfur dioxide from combustion gases uses an aqueous slurry containing calcium components resulting from the slaking of lime, with the slaked lime formed by...
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5270026 |
Sulfur dioxide scrubbing process producing purified magnesium hydroxide
A process for removing sulfur dioxide from flue gases where calcium sulfate and magnesium hydroxide are produced, with the magnesium hydroxide separated in an impure state and purified by addition...
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5266287 |
Regenerable flue gas desulfurization system
A regenerable flue gas desulfurization system whose end product is preferably a commercial quality gypsum (such as for use in wallboard or the like) or other product easily landfilled. Accordingly,...
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5266285 |
Sodium-enhanced lime scrubbing method for removing sulfur dioxide from gaseous streams
Sulfur dioxide is removed from a gaseous stream by contact with a lime slurry which contains sulfur to produce thiosulfate ions and 2,000-10,000 ppm of effective sodium ions to effect removal of...
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5260045 |
Modification of magnesium-enhanced lime flue gas desulfurization process to improve solids dewatering
An improved wet magnesium-enhanced lime flue gas desulfurization system and process are provided. The magnesium-enhanced lime slurry process for removing sulfur dioxide from flue gas to produce gas...
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5246679 |
Addition of organophosphonates for size control of wet calcium-based FGD byproduct solids under inhibited oxidation conditions
A process for producing large, regularly-shaped crystalline calcium sulfite solids in a wet calcium-based flue gas desulfurization system is provided. A chemical crystal modifier, preferably an...
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5246678 |
High-performance flue-gas desulfurization process
A desulfurization process which comprises the steps of bringing a combustion exhaust gas into contact with a gypsum slurry containing 1% or less of calcium carbonate in a first absorption tower,...
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5246471 |
Method and apparatus for gas liquid contact
A gas-liquid contact system for absorption of gaseous contaminants in an absorptive liquid where contact is attained by a controlled flow relationship between the gas and the liquid forming a...
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5084255 |
Sulfur dioxide removal process with gypsum and magnesium hydroxide production
Sulfur dioxide is removed from flue gases using an aqueous solution of magnesium components in a wet scrubber, with oxidation of a portion of the aqueous discharge from the scrubber. Calcium...
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5077023 |
Reduction in the rate of oxidation of sulfite solutions
The rates of oxidation of sulfite/bisulfite-containing solutions in gas-liquid scrubbers for removing SO 2 from gases are reduced by adding oxidation inhibitors to the solutions in an amount of...
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5075085 |
Desulfurizing method for exhaust gas from combustor
A method and equipment for desulfurizing exhaust gas from a combustor in which the exhaust gas containing SO 2 from the combustor is brought into contact with SO 2 absorbent to remove SO 2 and...
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5047218 |
Sweetening of sulfur-containing gases using ozone
A process which reduces the amount of sulfur compounds present in a feed gas is disclosed. A gas containing sulfur compounds is admixed with an ozone-containing gas. This admixture is then...
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5039499 |
Process for desulfurization of sulfur dioxide-containing gas streams
A process for desulfurizing sulfur dioxide-containing gases wherein the sulfur-containing gases are contacted with an aqueous solution of magnesium hydroxide in a wet scrubber, wherein magnesium...
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4996032 |
Process for removing sulfur dioxide from flue gases
A process for removing sulfur dioxide from a flue gas in a wet scrubber with an aqueous slurry formed from calcium hydroxide and magnesium hydroxide with magnesium hydroxide or magnesium oxide...
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4976937 |
Sulfur dioxide removal from flue gases with sulfite oxidation inhibition
A method for removing sulfur dioxide from flue gases in a wet scrubbing system where calcium thiosulfate and calcium polysulfides are formed by the reaction of lime and emulsified sulfur and the...
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4876076 |
Process of desulfurization
In the desulfurization of flue gas utilizing limestone as absorbent in a double loop system, in which the flue gas is introduced into a quenching zone for contact with a first slurry of the...
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4867961 |
Method of removing sulphur dioxide from a gaseous stream
Capture-fixation of SO 2 from flue and non-ferrous smelter gases is achieved with the use of MgO aqueous slurry as an absorbing medium. During the absorption, most of the MgO is converted to MgSO...
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4837361 |
A process for the preparation of cysteine from cystine
The present invention in one aspect relates to a process for the simultaneous removal of NO x and SO 2 from a fluid stream comprising mixtures thereof and in another aspect relates to the...
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4837001 |
Production of sulfur from sulfur dioxide obtained from flue gas
This invention is a regenerable process for producing elemental sulfur from SO 2 initially contained in a dilute gas source by: (1) absorbing the SO 2 in a concentrated Na 2 SO 3 solution to...
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4834959 |
Process for selectively removing sulfur dioxide
Gas feed streams containing sulfur dioxide such as flue gas streams are first contacted with an aqueous solution of inorganic sulfites and bisulfites having a pH range from about 2 to about 6.5 to...
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4810477 |
Method for desulfurizing smoke
The present invention is concerned with a method for desulfurizing smoke which includes an absorbing procedure of cleaning a combustion exhaust gas with a limestone slurry; an oxidizing procedure...
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4708856 |
Liquid-gas absorption process
A process for absorbing SO 2 from a gas in a packed column employs a low aqueous sulfite feed rate of 0.05 to 1 gallon per minute per square foot of tower cross section, or preferably 0.1 to 0.3...
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4698219 |
Treatment of waste from iron ore reduction
Spent flux containing calcium oxide and calcium sulfide, recovered from the reduction of iron ore, is carbonated, as an aqueous slurry, in two stages, with the first stage being operated at a pH to...
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4687648 |
Sodium-limestone double alkali flue gas desulfurization process with improved limestone utilization
A method for improving utilization of limestone in a sodium-limestone double alkali flue gas desulfurization process. Spent alkaline absorber solution, containing sodium sulfite and sodium...
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4620856 |
Air pollution control process and apparatus
Improved combination wet absorber/spray-dry dry wastes collection air pollution control process and apparatus therefor, employing aqueous solutions of sodium or ammonium alkali sorbents injected in...
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4615780 |
Method of removing oxides of sulfur and oxides of nitrogen from exhaust gases
A continuous method is presented for removing both oxides of sulfur and oxides of nitrogen from combustion or exhaust gases with the regeneration of the absorbent. Exhaust gas is cleaned of...
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4544542 |
Method for oxidation of flue gas desulfurization absorbent and the product produced thereby
A method for treating the fine-grained spend absorbent (primarily calcium sulfite and calcium sulfate) from a dry flue gas desulfurization process. The absorbent, having a small amount of binder...
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4541999 |
Method for removing acidic components including nitrogen oxide from waste gases
A method of simultaneously removing SO x and NO x from waste gases. Using a known desulfurization process the waste gases free of the acidic components are contacted with an oxidizing agent in...
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4533522 |
Apparatus for the desulfurization of flue gases
A rotary heat exchanger surmounts a scrubbing tower provided with two scrubbing columns through which the flue gas of fossil fuel combustion is passed in succession so that the rotary heat storage...
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4515754 |
Washing tower for the desulfurization of flue gases
A scrubber is provided with a grate in its sump through which oxygen is introduced to separate the oxidation zone above this grate from a reaction zone below the grate, a calcium containing...
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4474737 |
Process of purification of magnesic raw material
Process of purification of magnesic raw material. Sulphur dioxide is allowed to react with an aqueous suspension of calcinated magnesite, crude or contaminated magnesium oxide, magnesium hydroxide,...
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