Pulp washing method in a chemical pulp pulp mill

摘要

method related to washing pulp in a chemical pulp pulp mill the present invention relates to a method related to washing pulp in a chemical pulp pulp mill that comprises at least one alkaline cooking process to produce pulp, brown raw material with essentially closed liquid cycles, where a final washing device is a washing device based on the pressing of pulp, in a press or in a washing press, a pulp bleaching plant that uses bleaching by ecf , where chloride-containing effluents are formed, a chemical recovery and effluent purification plant. an objective of the present invention is to offer a method for using liquid flows generated in a chemical pulp cellulose plant with advantageous objective and to circulate them efficiently without disturbing the main process and reducing emissions from the factory to a minimum. a characteristic aspect of the invention is that the purified effluent in the amount of at least 1 m3 / adt of pulp is introduced into the dilution after the washing press or press, and in this way the effluent from the dilution passes to the first stage of the process bleaching.