A method of cleaning a complex powder transfer system including providing a powder transfer system having a washing fluid source, a spray device valve in fluid communication with the washing fluid source, a backflush valve in fluid communication with the washing fluid source, a receiving device having an upper chamber, a lower chamber, and a membrane filter disposed between the upper and lower chambers. The method includes opening the backflush valve to initiate a backflush cycle, running the backflush cycle to wash the upper chamber with a fluid, and closing the backflush valve after the backflush cycle completes. The method includes opening the spray device valve to initiate a spray device cycle, running the spray device cycle to wash the lower chamber with fluid, and closing the spray device valve after the spray device cycle completes. The method includes opening a pressure valve to provide PCA to the receiving container.

A system for processing a semiconductor wafer is provided. The system includes a processing tool. The system also includes gas handling housing having a gas inlet and a gas outlet. The system further includes an exhaust conduit fluidly communicating with the processing tool and the gas inlet of the gas handling housing. In addition, the system includes at least one first filtering assembly and at least one second filtering assembly. The first filtering assembly and the second filtering assembly are positioned in the gas handling housing and arranged in a series along a flowing path that extends from the gas inlet to the gas outlet of the gas handling housing. Each of the first filtering assembly and the second filtering assembly comprises a plurality of wire meshes stacked on top of another.

A method for wetting volatile material positioned on a filter from an additive manufacturing process includes passing a passivation fluid to an interior space of a filtration system including an outer housing, a filtration medium, detecting an amount of passivation fluid passed to the interior space with a volume detection device, determining whether the amount of passivation fluid passed to the interior space is less than a configurable threshold, in response to determining that the amount of passivation fluid passed to the interior space is less than the configurable threshold, continuing to pass the passivation fluid to the interior space, and in response to determining that the amount of passivation fluid passed to the interior space is not less than the configurable threshold, stopping the passing of passivation fluid to the interior space.

A self-cleaning magnetic filter for removing ferrous contaminates from a natural gas process stream including a housing through which the process stream follows for removing ferrous contaminates in the process stream by magnetic attraction with a plurality of magnetic bars that are removably disposed in a plurality of non-magnetic sleeves disposed within the housing. A recirculating washing solution is used to flush contaminates that adhere to the exterior surfaces of the non-magnetic sleeves and from the housing. A bag filter is used to remove contaminates from the washing solution to allow recycling the washing solution.

A self-cleaning magnetic filter for removing ferrous contaminates from a natural gas process stream including a housing through which the process stream follows for removing ferrous contaminates in the process stream by magnetic attraction with a plurality of magnetic bars that are removably disposed in a plurality of non-magnetic sleeves disposed within the housing. A recirculating washing solution is used to flush contaminates that adhere to the exterior surfaces of the non-magnetic sleeves and from the housing. A bag filter is used to remove contaminates from the washing solution to allow recycling the washing solution.

A modular high-efficiency particulate air (HEPA) filtration system includes first and second modular filtration units and a blower unit. The blower unit draws air from an isolated indoor space of a facility via a ventilation input to maintain negative air pressure within the isolated indoor space. The first modular filtration unit and the second modular filtration unit are connected in parallel with the ventilation input and the blower unit. The first modular filtration unit is disposed between the blower unit and the ventilation input and at least a portion of air drawn through the ventilation input by the blower unit passes through the first modular filtration unit, and the second modular filtration unit is disposed between the blower unit and the ventilation input and at least a portion of the air drawn through the ventilation input by the blower unit passes through the second modular filtration unit.

A ventilation type air cleaner includes a housing having a central rotating shaft including a purification part, a washing part, and a sterilization part in a circumferential direction with respect to the central rotating shaft, a rotating unit installed to be rotatable about the central rotating shaft as a rotation center in the housing, a filter assembly detachably coupled to the rotating unit and configured to sequentially pass through the purification part, the washing part, and the sterilization part according to rotation of the rotating unit, an intake duct connected to the housing and configured to guide a flow of air introduced to the purification part, and an exhaust duct connected to the housing and configured to guide a flow of air discharged from the purification part.

The present invention relates to a filtering device for removing particles from a bodily fluid of a patient, the filtering device being implantable in the patient's body. The device has a tube forming a main fluid passageway for bodily fluid, through which the bodily fluid of the patient passes when the tube is implanted in the patient, a filter connected to the tube and a filter cleaning device for cleaning the filter by moving particles collected by the filter out of the fluid passageway, wherein the filter cleaning device is adapted to replace the first filter in the fluid passageway with a second filter, thereby moving the particles collected by the first filter out of the fluid passageway.

An improved mechanical electrostatic filter assembly for filtering an air stream from particulates, comprising either a single cartridge or multiple cartridges positioned in a consecutive manner, either close together or separated from one another via air gaps, each of the multiple cartridges comprising inner filtering media, each of the multiple cartridges haying a back wall and a front wall, each of the back wall and each of the front wall having multiple openings through which the air stream is passing.

As the air stream with particulates approaching the improved mechanical electrostatic filter assembly, and hitting an outer surface of the front wall of a first cartridge, friction is established and the particulates get electrostatically charged, wherein the air stream with the electrostatically charged particulates passing through the multiple openings of the front wall and the electrostatically charged particulates are electrically coupled to the inner filtering media, the air stream exiting the first cartridge can pass through at least one additional cartridge for filtering the particulates remained in the air stream.

An improved mechanical electrostatic filter assembly for filtering an air stream from particulates, comprising either a single cartridge or multiple cartridges positioned in a consecutive manner, either close together or separated from one another via air gaps, each of the multiple cartridges comprising inner filtering media, each of the multiple cartridges haying a back wall and a front wall, each of the back wall and each of the front wall having multiple openings through which the air stream is passing.

As the air stream with particulates approaching the improved mechanical electrostatic filter assembly, and hitting an outer surface of the front wall of a first cartridge, friction is established and the particulates get electrostatically charged, wherein the air stream with the electrostatically charged particulates passing through the multiple openings of the front wall and the electrostatically charged particulates are electrically coupled to the inner filtering media, the air stream exiting the first cartridge can pass through at least one additional cartridge for filtering the particulates remained in the air stream.