Method and device for cleaning wastewater polluted with coarse, fine and very fine material and a filter for filtering wastewater polluted with coarse, fine and very fine material

摘要

The procedure for cleaning waste water loaded with rough-, fine- and finest materials from building sites, mining industry or industrial companies, comprises tangentially introducing the loaded waste water into an area of the bottom level of a container (101), separating larger solid materials by gravitation, centrifugal force and depositing at the bottom of the container and hydraulically separating the sediments, distributing the cyclic water flow into a water roller, and collecting and separating the floatable materials at the fluid surface. The procedure for cleaning waste water loaded with rough -, fine- and finest materials from building sites, mining industry or industrial companies, comprises tangentially introducing the loaded waste water into an area of the bottom level of a container (101), separating larger solid materials by gravitation, centrifugal force and depositing the separated solid materials at the bottom of the container and hydraulically separating the sediments, distributing the cyclic water flow into a water roller, collecting and separating the floatable materials at the fluid surface, transferring the delivered waste water from floatable and medium-sized and larger solid materials into a cross-flow-filter, and sedimenting and draining smaller and smallest solid materials in environment, passing through the delivered waste water from the sedimented solid materials by an interchangeable filter, and draining the cleaned water. The polluted water is introduced by the force of gravity or with a pump into the container. The water roller downwardly circulates along a container wall and a first zone lying in an interior. Heavy materials are sedimented in the first zone and light materials are raised in the container center with a fluid flow (4). Fine particles are separated slowly in the raised fluid flow. The solid materials are derived from the bottom area of the container sedimented in the separation process. The fine solid materials sedimented in the cross flow-chamber and held back from the filter element are combined or separately drained with the solid materials from the container. An active agent is added to the wastewater for precipitating materials or absorbing dissolved materials before introducing into the container and the precipitated materials are sedimented with the solid materials. Independent claims are included for: (1) device for cleaning waste water loaded with rough-, fine- and finest materials from building sites, mining industry or industrial companies; and (2) filter for the filtration of solid materials from fluids and gases.