PROCEDURE FOR THE PRODUCTION OF BOILER FEEDING WATER FROM THE WASTE WATER OF FLUE GAS DESULPHURATING PLANTS

The invention concerns a procedure for the production of boiler feeding water from the waste water of Rauchgasent sulfurization-lay close. For the distance of the sulfur from flue gases of boiler plants, which serve for example the kalorischen generation of current, among other things the so-called wet wash procedures exist. B with those also chlorine is removed from the flue gases. The water for the wet laundry can be taken from the receiving stream. At the time of execution of these processes high quantities of calcium chloride result, which is solved in the waste water and neither may into the groundwater nor into the receiving stream be delivered. On the other hand the generation of current process needs a relatively high quantity of fully entsalztem make-up water with the help of a boiler and a steam turbine. This make-up water is usually won from the groundwater and prepared chemical. The withdrawal from the groundwater often leads to difficulties and ecological disadvantages. The procedure according to invention avoids the disadvantages described above and is characterized by that the waste water of the flue gas desulphurating plant is supplied to a thickener, whose vapour delivers its warmth with the condensation to the boiler feeding water, and which is supplied thereby developing condensate after possibly further cooling of the complete softening plant for the boiler feeding water. Thickening procedures are well-known with the demineralization of sea water. Thus the concentrated brine serves as cooling agent and for the condensation of steam in a relaxation evaporator e.g. in accordance with the DE-OS 2951615. In contrast hiezu the resulting brine is preheated according to invention by the concentrated brine. The procedure to supply to the concentrated brine for dilution fresh sea water does not find correspondence with the invention. This block letters give from there no suggestion for invention. The invention is in the design in a example-wise execution form more near darge2s places and described. The calcium chloride brine from the desulfurization plant joins --1-- into a heat exchanger --2-- , in that it of the hot, concentrated calcium chloride brine is warmed up. The brine warmed up now becomes in the thickener --3-- partly evaporates, whereby the thickened brine --6-- taken off and the heat exchanger --2-- is supplied, where she cools down and --7-- coldly results. In such a way concentrated brine can be used for the snow and ice removal of traffic surfaces and stands, if that is not possible, in a transport-friendly, concentrated form for the order. Vapour steam leaves --8-- the thickener and arrives at the condenser --9--, where it to the boiler feeding water a majority of its warmth delivers and condenses. The condensate leaves --10-- the condenser and knows possibly after a further, not dargestell3s ten cooling of the desalination plant --11-- are supplied. After the condensate fully entsalzt and so that is boiler suited, it can do either continuously or after inserting a storage vessel if necessary the boiler feeding water, that of the turbine condenser --13-- comes, in the place --12-- are added. This boiler feeding water becomes in the heat exchanger --9-- preheated and leaves --14-- the represented cutout of the cycle. The heating up of the brine in the thickener --3-- can take place in different kind. At most economical with Fremdoder drawing off steam, --4-- the thickener --3-- and its condensate is supplied by means of a pump --15-- into the condensate container of the supply steam system or into the receiving stream or in the boiler feeding water --5-- one delivers.