Wet-process gas treatment method and wet-process gas treatment apparatus
AssigneeCanon Kabushiki Kaisha
InventorsHiroshi Echizen, Hiroshi Izawa
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Abstract
In a wet-process gas treatment method of treating an acid gas by means of at least two treating columns connected in series, ratio of concentration of acid gas at an outlet to concentration of acid gas at an inlet, of a first treating column is set higher than ratio of concentration of acid gas at an outlet to concentration of acid gas at an inlet, of at least one of other treating columns, thereby preventing deposits from forming in the interior of connecting pipes between the columns and in the interiors of the treating columns, to prevent the connecting pipes from their blockage.
Claims8
A wet-process gas treatment method which is a method of treating an acid gas by means of at least two treating columns connected in series, wherein
- ratio of concentration Ce1 of acid gas at an outlet to concentration Ci1 of acid gas at an inlet, R1=Ce1/Ci1, of a first treating column into which the acid gas is first introduced is higher than ratio of concentration Cen of acid gas at an outlet to concentration Cin of acid gas at an inlet, Rn=Cen/Cin, of at least one of n-th treating columns (n≧2).
A wet-process gas treatment method which is a method of treating an acid gas by means of at least two treating columns connected in series, wherein
- a mist flow which is generated from an alkaline treating fluid sprayed from a spray nozzle installed inside a k−th treating column (k is a natural number) and flows on to a k−th+1 treating column is kept alkaline in any space in pipes which interconnect the treating columns.
A wet-process gas treatment method which is a method of treating an acid gas by means of at least two treating columns connected in series, wherein
- flow rate of a spray, or concentration, of an alkaline treating fluid is so controlled that, in respect of the alkaline treating fluid sprayed into a first treating column, its pH value measured in a treating fluid tank provided at a lower part of the first treating column comes to 9 or more.
A wet-process gas treatment apparatus which is an apparatus having at least two treating columns connected in series through connecting pipes, and treating an acid gas with an alkaline treating fluid, wherein
- quantity of packings packed in a first treating column is smaller than quantity of packings packed in any one treating column of second and following treating columns.
A wet-process gas treatment apparatus which is an apparatus having at least two treating columns connected in series through connecting pipes, and treating an acid gas with an alkaline treating fluid, wherein
- among the connecting pipes, at least a connecting pipe between a first treating column and a second treating column has spray nozzles to spray into the interior of the connecting pipe in a number of the number of bends plus 1 or more, and the spray nozzles are each so disposed that the alkaline treating fluid is directly sprayed thereon from other nozzle.
Dependencies are inferred from the claim text.