Prevention of contamination of a dried product, deformation of particles, and a change of particle size distribution. The system includes: a solid-liquid separator in which a processing material is supplied between a pair of endless separation filter cloths wound around an outer periphery of a separation roll, and is dehydrated by being squeezed therebetween and also by ventilation gas passing from a ventilation port formed in an outer peripheral surface of the separation roll; and a horizontal rotary dryer provided on a subsequent stage of the solid-liquid separator, wherein carrier gas is made to flow in a rotating shell of the dryer in a cocurrent manner in the same direction as a conveyance direction of the processing material.

A pair of filter cloths is wound around a first roll a plurality of times by being wound around the first roll, then being wound around a second roll to return to a space between the first roll and the pair of filter cloths wound around the first roll, and being wound around the first roll again. The pair of filter cloths wound around the first roll the plurality of times applies a pressing force to the first roll.

The present technology relates generally to fluid filtration systems. In particular, several embodiments are directed toward compartmentally expandable rotating belt filters and associated systems and methods. In some embodiments, for example, a filtering system for contaminated fluid includes a first fluid filtering chamber having a first filter belt movably positioned therein and a second fluid filtering chamber having a second filter belt movably positioned therein. The first filter belt can be operable in parallel with the second filter belt. The system can further include a sensor configured to sense a condition related a volume of the contaminated fluid, a speed of flow of the contaminated fluid, or a level of contaminants in the contaminated fluid. A controller can be configured to initiate, stop, or adjust fluid flow to the first fluid filtering chamber and second fluid filtering chamber individually in response to the sensed condition.

The present technology relates generally to fluid filtration systems. In particular, several embodiments are directed toward compartmentally expandable rotating belt filters and associated systems and methods. In some embodiments, for example, a filtering system for contaminated fluid includes a first fluid filtering chamber having a first filter belt movably positioned therein and a second fluid filtering chamber having a second filter belt movably positioned therein. The first filter belt can be operable in parallel with the second filter belt. The system can further include a sensor configured to sense a condition related a volume of the contaminated fluid, a speed of flow of the contaminated fluid, or a level of contaminants in the contaminated fluid. A controller can be configured to initiate, stop, or adjust fluid flow to the first fluid filtering chamber and second fluid filtering chamber individually in response to the sensed condition.

A method of manufacturing polyimide particles, including: combining a polyimide solution including a polyimide and an organic solvent with an aqueous solution including water in the presence of an emulsifying surfactant at a shear rate from 1,000 to 3,000 revolutions per minute, from 1,000 to 2,500 revolutions per minute, or from 1,500 to less than 2,500 revolutions per minute to form an emulsion; removing the organic solvent to form an aqueous polymer dispersion including polyimide particles; and recovering the polyimide particles, which have a spherical morphology, and a volume based D10 diameter from 3 to 50 micrometers, preferably from 3 to 45 micrometers and a volume based D90 diameter from 3 to 80 micrometers, from 3 to 75 micrometers, or from 3 to 45 micrometers and a volume based D100 diameter from 3 to 100 micrometers, from 3 to 75 micrometers, or from 10 to 75 micrometers.

A method of manufacturing polyimide particles, including: combining a polyimide solution including a polyimide and an organic solvent with an aqueous solution including water in the presence of an emulsifying surfactant at a shear rate from 1,000 to 3,000 revolutions per minute, from 1,000 to 2,500 revolutions per minute, or from 1,500 to less than 2,500 revolutions per minute to form an emulsion; removing the organic solvent to form an aqueous polymer dispersion including polyimide particles; and recovering the polyimide particles, which have a spherical morphology, and a volume based D10 diameter from 3 to 50 micrometers, preferably from 3 to 45 micrometers and a volume based D90 diameter from 3 to 80 micrometers, from 3 to 75 micrometers, or from 3 to 45 micrometers and a volume based D100 diameter from 3 to 100 micrometers, from 3 to 75 micrometers, or from 10 to 75 micrometers.

An internally fed drum filter for treating waste water, includes an inlet distribution arrangement for distributing waste water entering the drum filter via an inlet duct, characterized in that the inlet distribution arrangement includes an adjustable flow deflection member arranged near the outflow opening of the inlet duct, downstream thereof, for adjusting the flow characteristics of waste water entering the drum filter via the inlet duct.

The invention relates to a method and an apparatus for washing a crude lignin slurry (5) formed from plant based raw material, wherein the method comprises separating a soluble carbohydrate containing fraction (10) from the crude lignin slurry (5) by using displacement washing in at least one solid-liquid separation stage (6) so that the crude lignin slurry is prepressed, washed and pressed, and recovering a solid fraction (11) and the soluble carbohydrate containing fraction (10). Further, the invention relates to the soluble carbohydrate containing fraction and the solid fraction, and their uses.

The invention relates to a method and an apparatus for washing a crude lignin slurry (5) formed from plant based raw material, wherein the method comprises separating a soluble carbohydrate containing fraction (10) from the crude lignin slurry (5) by using displacement washing in at least one solid-liquid separation stage (6) so that the crude lignin slurry is prepressed, washed and pressed, and recovering a solid fraction (11) and the soluble carbohydrate containing fraction (10). Further, the invention relates to the soluble carbohydrate containing fraction and the solid fraction, and their uses.

An apparatus for performing an operation on a fluid material to separate liquid from solid matter within the fluid material The apparatus comprises a belt structure movable along a path. The belt structure comprises a belt portion adapted to be assembled into a movable tubular structure within which at least part of the operation is to be performed. The tubular structure is permeable to liquid for separation of liquid from solid matter within the fluid material. The tubular structure is continuously assembled at one end thereof and continuously disassembled at another end thereof during movement of the belt structure. The path includes a descending portion along which the assembled tubular structure passes, the descending portion being inclined whereby at least some of the solid matter within fluid material in the tubular structure is caused to move downwardly along the descending portion under the influence of gravity to facilitate cleaning of the permeable tubular structure.