The present invention provides a filtering apparatus for lens polishing wastewater and a system for reducing polishing wastewater, which efficiently remove fine particles such as lens particles and fine lens particles that are mixed into polishing water in a lens cutting and polishing process in a lens polishing machine such as an edger, to reduce the polishing water to be reused in lens polishing, and can prevent water pollution by fundamentally preventing the discharge of polishing water in which fine particles are mixed.

The present invention provides a multi-structure filtration device for filtering, separating, and dehydrating foreign substances in water, the multi-structure filtration device comprising: a filtration tank filled with filtration target fluid inside; a filtration device unit having a cylindrical double drum structure, installed in the filtration tank so that a part of the filtration device unit is submerged in the filtration target fluid, and including two or more filters having different mesh sizes that are respectively wound on an inside and an outside of the filtration device unit, and one or more washing modules washing foreign substances attached to the filter wound on an outside of the filtration device unit. Accordingly, the multi-structure filtration device can have excellent filtration performance by double-filtering the target fluid using two or more filters, can operate in an eco-friendly manner by recycling filtered water and effectively washing the filters using the filtered water without separate chemicals, can increase the durability of the filters, and can reduce the washing and processing cost by reusing the filters.

An assembly (1) for filtering water comprising: a filter (10) forming a permeable receptacle for fluid to be filtered, an actuating inlet (300) for providing a stream of water, a filter fluid inlet (302) for providing fluid to be filtered to the filter (10), and, a rotatable cleaning structure (20) for cleaning the filter (10), wherein the structure (20) comprises at least one scraper (201) extending along and substantially abutting a first surface (101) of the filter (10), the scraper (201) being rotatable with respect to the first surface (101) of the filter (10), and wherein the structure (20) further comprises at least one rotatable element (250) arranged for receiving the stream of water, the stream of water being receivable in, and filterable by, the filter (10) and wherein the element (250) is rotationally engaged with the scraper (201) such that the stream of water providing a rotational force to the element (250), rotates the scraper (201) with respect to the first surface (101) of the filter.

An assembly (1) for filtering water comprising: a filter (10) forming a permeable receptacle for fluid to be filtered, an actuating inlet (300) for providing a stream of water, a filter fluid inlet (302) for providing fluid to be filtered to the filter (10), and, a rotatable cleaning structure (20) for cleaning the filter (10), wherein the structure (20) comprises at least one scraper (201) extending along and substantially abutting a first surface (101) of the filter (10), the scraper (201) being rotatable with respect to the first surface (101) of the filter (10), and wherein the structure (20) further comprises at least one rotatable element (250) arranged for receiving the stream of water, the stream of water being receivable in, and filterable by, the filter (10) and wherein the element (250) is rotationally engaged with the scraper (201) such that the stream of water providing a rotational force to the element (250), rotates the scraper (201) with respect to the first surface (101) of the filter.

There is provided a removable downspout filter for installation into a downspout. The removable downspout filter includes a filter basket with attached face plate. The face plate includes side flaps configured to wrap around the downspout when the downspout filter is installed and is generally configured to blend in with the downspout. Also provided is a downspout with installed filter and kits including the same.

There is provided a removable downspout filter for installation into a downspout. The removable downspout filter includes a filter basket with attached face plate. The face plate includes side flaps configured to wrap around the downspout when the downspout filter is installed and is generally configured to blend in with the downspout. Also provided is a downspout with installed filter and kits including the same.

A method for producing a screen body for a screen used in a screw press, which screen body comprises one or more openings on a screen surface. In order to achieve a particularly long service life, it is provided that the screen body is formed by a sintering process and/or an additive manufacturing process, in particular a 31) printing process. Further embodiments include a screen, in particular for a screw press, having a screen body Which has openings on a screen surface.

A method for producing a screen body for a screen used in a screw press, which screen body comprises one or more openings on a screen surface. In order to achieve a particularly long service life, it is provided that the screen body is formed by a sintering process and/or an additive manufacturing process, in particular a 31) printing process. Further embodiments include a screen, in particular for a screw press, having a screen body Which has openings on a screen surface.

A laminated spiral dewatering equipment, including a filtration cavity, a spiral shaft, a driving device and multiple supporting plates. The supporting plates are configured to support and position the filtration cavity, the spiral shaft and the driving device. The spiral shaft is penetratedly arranged in the filtration cavity. The filtration cavity includes a first closed ring piece group and a second closed ring piece group. A primary driving rod of the driving device is arranged above the filtration cavity, and is configured to drive an upper end of the first closed ring piece group to circumferentially reciprocate, and a lower end of the first closed ring piece group to perform a up-down reciprocating linear motion.

A filter assembly and method of filtering wastewater from a washing machine. The filter has a framework for supporting a first filter stage and a second filter stage, a connection on a top of the filter assembly for connecting to a wastewater stream, a diffuser positioned to extend into the first filter stage and configured to rotate about a vertical axis of installation within the first filter stage, and a second filter stage below the first filter stage and configured to receive overflow from the first filter stage. The filter assembly does not include a motor or motorized parts and wherein the diffuser is rotatable by way of the force of the wastewater stream fed into the first filter stage to diffuse the wastewater stream and to spray the wastewater onto and through the filter media allowing the filter media to catch debris within the first filter stage.