The present invention discloses a method for self-cleaning filters without having to open the filter housing. Wash nozzles are integrated with the filter housings such that when the filters are clogged, both back-wash and regular washing can be performed with practically no down time. Moreover, without opening the filter housing, the hazardous components of the fluid to be filtered can be contained and dealt with before they escape the filter housing, thereby significantly reduces the environmental impact and harm to the working crew.

The present invention discloses a method for self-cleaning filters without having to open the filter housing. Wash nozzles are integrated with the filter housings such that when the filters are clogged, both back-wash and regular washing can be performed with practically no down time. Moreover, without opening the filter housing, the hazardous components of the fluid to be filtered can be contained and dealt with before they escape the filter housing, thereby significantly reduces the environmental impact and harm to the working crew.

A method of treating an animal skin substrate comprising: agitating the animal skin substrate with a solid particulate material and a treatment liquor; separating the animal skin substrate from effluent comprising the solid particulate material, the treatment liquor and solid waste fragments derived from said substrate; transferring the effluent to a first separator, wherein the first separator is configured to allow the treatment liquor and at least a portion of the solid waste fragments to pass through the first separator but to prevent the solid particulate material from passing through the first separator, and providing a first filtrate stream comprising treatment liquor and solid waste fragments and a first residue comprising solid particulate material and residual solid waste fragments treating said first residue to remove said residual solid waste fragments to provide cleaned solid particulate material, wherein said treating of said first residue comprises retaining said solid particulate material on a surface of a treatment separator during said treating, wherein the treatment separator is configured to allow liquid and residual solid waste fragments to pass through but to prevent the solid particulate material from passing through; and (i) directing a cleaning formulation onto said solid particulate material to provide a second filtrate stream comprising said cleaning formulation and said residual solid waste fragments and a second residue comprising cleaned solid particulate material; and/or (ii) agitating the treatment separator.

A method of treating an animal skin substrate comprising: agitating the animal skin substrate with a solid particulate material and a treatment liquor; separating the animal skin substrate from effluent comprising the solid particulate material, the treatment liquor and solid waste fragments derived from said substrate; transferring the effluent to a first separator, wherein the first separator is configured to allow the treatment liquor and at least a portion of the solid waste fragments to pass through the first separator but to prevent the solid particulate material from passing through the first separator, and providing a first filtrate stream comprising treatment liquor and solid waste fragments and a first residue comprising solid particulate material and residual solid waste fragments treating said first residue to remove said residual solid waste fragments to provide cleaned solid particulate material, wherein said treating of said first residue comprises retaining said solid particulate material on a surface of a treatment separator during said treating, wherein the treatment separator is configured to allow liquid and residual solid waste fragments to pass through but to prevent the solid particulate material from passing through; and (i) directing a cleaning formulation onto said solid particulate material to provide a second filtrate stream comprising said cleaning formulation and said residual solid waste fragments and a second residue comprising cleaned solid particulate material; and/or (ii) agitating the treatment separator.

A hollow fiber membrane filtration device includes a hollow fiber membrane module including a vessel that includes a treated water outlet and a concentrated water outlet, hollow fiber membranes, an upper end fixing member that fixes upper end parts of the hollow fiber membranes, a permeated water chamber that is formed on an upper side of the upper end fixing member, a water conduit through which raw water is supplied into the vessel, and a diffusion tube that is provided on a lower side of the hollow fiber membranes. A plurality of ejection holes are provided on a side peripheral surface of the water conduit. A raw water pipe and gas introduction device are connected with the water conduit. A drainage port is provided at a lower part of the vessel.

A hollow fiber membrane filtration device includes a hollow fiber membrane module including a vessel that includes a treated water outlet and a concentrated water outlet, hollow fiber membranes, an upper end fixing member that fixes upper end parts of the hollow fiber membranes, a permeated water chamber that is formed on an upper side of the upper end fixing member, a water conduit through which raw water is supplied into the vessel, and a diffusion tube that is provided on a lower side of the hollow fiber membranes. A plurality of ejection holes are provided on a side peripheral surface of the water conduit. A raw water pipe and gas introduction device are connected with the water conduit. A drainage port is provided at a lower part of the vessel.

A combination crystallizer washer filter dryer device and methods of using the device for producing washed and dried product of a reaction are disclosed. The device consolidates the functions of a crystallizer with the filtering, washing, and drying steps to a single vessel, eliminating the need for an additional crystallizer separate from the filter washer dryer device, the transfer of a reaction product or crystallized product from a crystallizer to a subsequent vessel for completing the filtering, washing, and drying process of the solid phase of the slurry.

A combination crystallizer washer filter dryer device and methods of using the device for producing washed and dried product of a reaction are disclosed. The device consolidates the functions of a crystallizer with the filtering, washing, and drying steps to a single vessel, eliminating the need for an additional crystallizer separate from the filter washer dryer device, the transfer of a reaction product or crystallized product from a crystallizer to a subsequent vessel for completing the filtering, washing, and drying process of the solid phase of the slurry.

Screen designs and screens for a mechanical separation device are disclosed for separating solids from liquids in a process stream. A screen may have a plurality of openings, which are conical shaped, having a diameter of about 1.0 mm to about 1.4 mm in size that are formed on a stainless steel sheet.

Screen designs and screens for a mechanical separation device are disclosed for separating solids from liquids in a process stream. A screen may have a plurality of openings, which are conical shaped, having a diameter of about 1.0 mm to about 1.4 mm in size that are formed on a stainless steel sheet.