A method for producing a cylindrical screen device with a plurality of profiled bars. The outer face of a plurality of mutually spaced annular bar holders, which are arranged perpendicular to the cylinder axis, are provided with recesses that are open at the edges. The recesses have a shape that substantially corresponds to the base of profiled bars in a complimentary manner. The recesses are marginally larger than the bases. The profiled bars are inserted into respective recesses, parallel to one another and parallel to cylinder axis.

Apparatus for removing debris from channeled water that includes a bar screen assembly. The assembly includes a plurality of spaced apart screen bars, each bar having an upstream edge and a downstream edge and distal ends to which U-shaped clips are attached. Each of the clips has a bar engaging portion and a cross member engaging portion that attaches to an associated cross member. The clips operate to space the trailing edge of the screen bars a predetermined distance from associated cross members and allow easy replacement of a bar. A continuous conveyor carries a plurality of rakes having a plurality of spaced apart tines which are adapted to fit between the screen bars as the rake is moved along the bars by the conveyor. The tines of the rake have a length that substantially spans the distance between the leading edge and trailing edge of a bar, so that tips of the rake tines extend to at least the trailing edge of an associated bar. Intermediate clips may be used to support the intermediate section of the screen bars.

A screening device for separating out and removing contaminants from wastewater includes two continuous conveyors, which are mounted with clearance from each other. Each has a drive wheel that is guided on a circular path and includes a fixedly situated bar screen, which includes multiple mutually spaced grating bars for removing contaminants from the wastewater. Each bar screen includes multiple clearing elements, which are connected to the conveyor for removing from the bar screen the contaminants that have been separated out by the bar screen. The bar screen forms a fixed screen surface that extends, in the intended installation position of the screening device, essentially in the flow direction of the wastewater reaching the screening device.

A bar-type screen cage has profiled screen bars which are spaced apart in a circumferential direction. Multiple support arrangements which are spaced apart in an axial direction of the screen cage are fastened by welding to the profile bars at the outside. The screen bars, which are spaced apart in an axial direction, form screen slots between them. Each support arrangement includes at least two support wires which are closely spaced apart in the axial direction of the screen bars and which are fixed to the screen bars by resistance welding. The two support wires of each support arrangement and the profile bars-are fixedly connected to one another by way of an additional weld seam.

A drainage pipe un-dissolved waste catch assembly includes a panel that has a rear edge, a front edge, a first lateral edge, a second lateral edge, a top side and a bottom side. The panel has a plurality of apertures therein extending into the top side and through the bottom side. A plate is attached to and extends along the front edge and forms a angle with the top side is between 120 and 150. A coupler is attached to the top side of the panel adjacent to the rear edge and releasably engages a discharge tube such that the panel is positioned below and extends forward of the discharge tube. As waste water flows outwardly of the discharge tube, any un-dissolved materials therein will be retained on the panel.

A wire cross-sectional shape for a wire wrap screen provides a primary and secondary gap with a contained circumferential volume in between. The secondary gap extends screen life by taking the place of the primary gap if erosion opens the primary gap and lets the larger solids get past. The closed space between the primary and secondary gaps also has the effect of reducing velocity due to the enlarged volume before the secondary gap is reached while also creating turbulence between the gaps to slow the fluid velocity to protect the secondary gap. All or parts of the wire outer surface can optionally be coated to extend service life.

The present disclosure relates to a separation device to separate contaminants from contaminated water. It comprises a container to receive the contaminated water. The container further comprises a contaminated water inlet, a filter, a presser for compressing and/or dewatering contaminants separated from the contaminated water, and a contaminant outlet. The container further comprises a gas inlet for generating gas bubbles into the contaminated water to further separate contaminants from the contaminated water. The present disclosure relates to a use of such a separation device and a method of separating contaminants from contaminated water.

The present invention relates to an inlet screen adapted to be arranged at the water inlet (8) of a hydropower plant and comprises a plurality of elongated bars (20), said bars (20) being separated by a distance holding means, each elongated bar (20) having in its elongation a proximal portion and a distal portion, and an upstream region and a downstream region, said upstream and downstream regions being at an angle in relation to said proximal and distal portions, at least one of said bars (20) defining a space (36; 36a) extending along at least a portion of the elongation of said bar (20), said bar (20) being provided with an electric heating means (31). In accordance with the invention, said elongated bar has an elongated intermediate portion (38a), said space (36; 36a) being defined in either of the upstream region (35a) and the downstream region (35b), said intermediate portion (38a) extending along the elongation of the bar (20) between the upstream region (35a) and the downstream region (35b), said electric heating means (31) comprising at least one electric heating member (37) being introduced into said space (36; 36a).

The present invention provides a strainer for use with a water pump in a mine that includes a grill for preventing the ingress of solid material over predetermined dimensions, and an air discharge structure positioned so as to produce a continuous flow of air to remove the material from at least part of the grill, so that flow is maintained through the strainer.

The present invention is directed to a debris catching and removing apparatus and method. For example, bar screens or grids for collecting and removing trash or debris from storm, waste water, or sewage systems, and mounting systems and methods therefore are provided. These apparatus and method may provide a long-lasting, light-weight, and low-cost debris screen screening solutions for removing trash or debris from, for example, storm, waste water, or sewage systems. The invention may be particularly applicable to small lift stations that use submersible pumps or surface mounted pumps that suction waste water from a wet well.