Method for cooling gases containing naphthalene, tar and solids
AssigneeDr. C. Otto & Comp. G.m.b.H.
InventorHansjurgen Ullrich
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Abstract
Hot gases containing naphthalene and tar together with the possible inclusion of solids are contacted in a spray tower with water to cool the gases. A naphthalene extraction agent, such as tar, is vigorously admixed with water withdrawn from the spray tower. The admixture is separated in a settling tank from which water is obtained and recycled to the spray tower for cooling further quantities of gases. Solids, gas condensate and tar enriched with naphthalene are separately removed from the settling tank.
Claims7
A method for cooling gases containing naphthalene and tar together with the possible inclusion of solids, said method including the steps of:
- contacting the gases in a direct condenser with a cooling liquid to cool the gases and to remove naphthalene from the gases,
- withdrawing cooling liquid from the direct condenser into a separate mixer after contact with the gases,
- vigorously admixing the withdrawn cooling liquid containing naphthalene with a naphthalene extraction agent unenriched with naphthalene introduced into said mixer having a driven agitator to extract naphthalene from the cooling liquid,
- feeding the vigorously admixed naphthalene extraction agent and cooling liquid from the mixer into a settling tank,
- separating the cooling liquid in said settling tank by settling out of the naphthalene extraction agent while enriched with the naphthalene extracted from the cooling liquid,
- withdrawing cooling liquid from the upper part of the settling tank,
- withdrawing the naphthalene extraction agent from the lower part of the settling tank,
- removing solids from the settling tank, and
- returning the withdrawn cooling liquid obtained by said step of separating into said direct condenser to cool further quantities of gases by said step of contacting.
Dependencies are inferred from the claim text.