Abstract: A device for filtering air for a user comprising a frame formed in a generally oval-shaped band, the band encircling the user's head, with an upper portion above the user's head and a lower portion proximate to and spaced apart from the user's chin, an intake aperture formed in the frame, and an intake air filter covering the intake aperture. The device includes an air mover chamber attached with an air-tight seal to an inside surface of the frame and communicating on one end with the intake air filter and communicating on another end with a filtered air supply inlet inside the device and an air mover disposed within the air mover chamber and configured to draw air through the intake air filter and push air out the filtered air supply inlet. The device also includes an exhaust aperture formed in the frame and an exhaust air filter covering the exhaust aperture.

Abstract: A device for filtering air for a user comprising a frame formed in a generally oval-shaped band, the band encircling the user's head, with an upper portion above the user's head and a lower portion proximate to and spaced apart from the user's chin, an intake aperture formed in the frame, and an intake air filter covering the intake aperture. The device includes an air mover chamber attached with an air-tight seal to an inside surface of the frame and communicating on one end with the intake air filter and communicating on another end with a filtered air supply inlet inside the device and an air mover disposed within the air mover chamber and configured to draw air through the intake air filter and push air out the filtered air supply inlet. The device also includes an exhaust aperture formed in the frame and an exhaust air filter covering the exhaust aperture.

Abstract: A head covering air filtering device containing a rigid component including a transparent face shield, a fabric component, wherein the rigid component and the fabric component combine to cover an entire head of a user and form a seal around the user's neck. The device further includes an intake filter to filter all intake air entering the device, an exhaust filter to filter all exhaust air exiting the device, and an air mover causing intake air to enter the device and exhaust air to exit the device.

Abstract: A head covering air filtering device comprising a rigid component comprising a transparent face shield, a fabric component, wherein the rigid component and the fabric component combine to cover an entire head of a user and form a seal around the user's neck. The device further comprises an intake filter to filter all intake air entering the device, an exhaust filter to filter all exhaust air exiting the device, and an air mover causing intake air to enter the device and exhaust air to exit the device.

Abstract: A personal air filtering device comprising a rigid component comprising a transparent face shield, a fabric component, wherein the face shield and fabric combine to cover an entire head of a user and form a seal around the user's neck, an intake port with an inlet filter, an exhaust port with an exhaust filter, an air mover causing filtered air to enter the intake port from outside the device and exhaust air to exit the exhaust port, and a controller configured to adjust the rate at which the air mover moves air.

Abstract: A personal air filtration system comprising a rigid component, a flexible component, wherein the rigid component and the flexible component combine to cover at least a user's mouth and nostrils and form a seal therearound, an intake port with an inlet filter, an exhaust port, an air mover causing filtered air to enter the intake port and exhaust air to exit the exhaust port, and an app running on a user's smart device, wherein a smart app is configured to control and monitor operation of the system.

Abstract: A device for filtering air for a user comprising a frame formed in a generally oval-shaped band, the band encircling the user's head, with an upper portion above the user's head and a lower portion proximate to and spaced apart from the user's chin, an intake aperture formed in the frame, and an intake air filter covering the intake aperture. The device includes an air mover chamber attached with an air-tight seal to an inside surface of the frame and communicating on one end with the intake air filter and communicating on another end with a filtered air supply inlet inside the device and an air mover disposed within the air mover chamber and configured to draw air through the intake air filter and push air out the filtered air supply inlet. The device also includes an exhaust aperture formed in the frame and an exhaust air filter covering the exhaust aperture.

Abstract: A device for filtering air for a user comprising a frame formed in a generally oval-shaped band, the band encircling the user’s head with an upper portion extending from the user’s ear to a point above and to the rear of the user’s head and a lower portion extending from the user’s ear to a point below and in front of the user’s mouth. The device includes an air inlet filter mounted on the frame and communicating on one side with ambient air outside the device and on the other side with an inlet duct and an air outlet filter mounted on the frame and communicating on one side with air inside the device and on the other side with ambient air outside the device. The device also includes a battery-powered air mover mounted on the frame and operable to move intake air through the air inlet filter through the inlet duct and into the inside of the device. A rechargeable battery is mounted on the frame to power the air mover.

Abstract: A device for filtering air for a user comprising a frame formed in a generally oval-shaped band, the band encircling the user's head, with an upper portion extending above and behind the user's ears and a lower portion extending below and in front of the user's ears. The device includes components mounted to the frame, comprising an air intake filter mounted on the frame and communicating on one side with ambient air outside the device and on the other side with an inlet duct and an air outlet filter mounted on the frame and communicating on one side with air inside the device and on the other side with ambient air outside the device. The device also includes a battery-powered air mover mounted on the frame and operable to pull air through the air intake filter and through the inlet duct and push air out into the inside of the device and a rechargeable battery mounted on the frame to power the air mover.

Abstract: An air filtering mask is disclosed which includes a rigid component and a flexible component. The rigid component and the flexible component combine to form a space over a user's mouth and nostrils, to form a seal therearound and to maintain the mask in place. The mask also includes an exhaust port with an exhaust filter and an intake port with an intake filter. The mask further includes an air mover pulling exhaust air out the exhaust port, thereby drawing intake air through the intake port.

Abstract: A device for filtering air for a user comprising a rigid component comprising a transparent face shield that provides a space for air between an inside surface of the face shield and the user's face, an intake port, through which air enters the device, an exhaust port, through which air exits the device, a fabric component affixed to the rigid component that, combined with the rigid component, covers the user's head and seals around the user's neck, an intake filter that filters air passing through the intake port, an exhaust filter that filters air passing through the exhaust port, and an air mover held by the rigid component that moves air through the intake port and out the exhaust port.

Abstract: A head covering air filtering device comprising a rigid component comprising a transparent face shield, a fabric component, wherein the rigid component and the fabric component combine to cover an entire head of a user and form a seal around the user's neck. The device further comprises an intake filter to filter all intake air entering the device, an exhaust filter to filter all exhaust air exiting the device, and an air mover causing intake air to enter the device and exhaust air to exit the device.

Abstract: A head covering device comprising a rigid component comprising a transparent face shield, a fabric component, wherein the face shield and fabric combine to cover an entire head of a user and form a seal around the user's neck, an intake port with an inlet filter, an exhaust port with an exhaust filter, an air mover causing filtered air to enter the intake port and exhaust air to exit the exhaust port, and communication hardware facilitating communication for the user.

Abstract: A device for covering the head of a user comprising a rigid component comprising a transparent face shield and an air port, a fabric component, wherein the rigid component and the fabric component combine to cover the head of the user and seal around the neck of the user, and an air mover mounted on the rigid component so as to cause air to move either into or out of the air port, a filter that filters air moving through the air port, wherein at least a portion of the fabric component allows air to either move into the device if the air mover moves air out of the air port or move out of the device if the air mover moves air into the air port, and wherein the at least a portion of the fabric allows air to move into or out of the device also filters the air moving into or out of the device.

Abstract: A device for filtering air, a rigid component comprising a transparent face shield, a fabric component, wherein the fabric component and the rigid component combine to cover an entire head of a user and form a seal around the user's neck, an intake port, an intake filter that filters intake air passing through the inlet port, an exhaust port, an exhaust filter that filters exhaust air passing through the outlet port, an air mover positioned to pull air through the exhaust port, whereby intake air is drawn into the device through the inlet port and whereby the intake air and exhaust air is filtered.

Abstract: Methods and systems for conducting batch multi-effect distillation are disclosed. A multi-effect distillation system and one or more isolation devices are provided. A feed stream, consisting of water and a solute, is passed from a feed source into a brine side of the plurality of heat exchangers. The feed source is isolated from the plurality of heat exchangers by closing the one or more isolation devices. A first of the plurality of heat exchangers is heated by the heat source. A steam stream and a brine concentrate stream are produced in all but a last of the plurality of heat exchangers. A condensate stream from the steam stream is produced in all but the first of the plurality of heat exchangers. A warmed feed stream is produced in the last of the plurality of heat exchangers.

Abstract: A personal air filtration system comprising a rigid component, a flexible component, wherein the rigid component and the flexible component combine to cover at least a user's mouth and nostrils and form a seal therearound, an intake port with an inlet filter, an exhaust port, an air mover causing filtered air to enter the intake port and exhaust air to exit the exhaust port, and an app running on a user's smart device, wherein a smart app is configured to control and monitor operation of the system.

Abstract: A personal air filtering device comprising a rigid component comprising a transparent face shield, a fabric component, wherein the face shield and fabric combine to cover an entire head of a user and form a seal around the user's neck, an intake port with an inlet filter, an exhaust port with an exhaust filter, an air mover causing filtered air to enter the intake port from outside the device and exhaust air to exit the exhaust port, and a controller configured to adjust the rate at which the air mover moves air.

Abstract: A personal air filtering device for protecting a user from harm, the device comprising a rigid component comprising a transparent face shield, a fabric component, wherein the face shield and fabric combine to cover an entire head of a user and form a seal around the user's neck, an intake port with an inlet filter, an exhaust port with an exhaust filter, an air mover causing filtered air to enter the intake port and exhaust air to exit the exhaust port, one or more sensors, each configured to detect either an environmental condition or a condition of the user, and a processor configured to receive signals from the one or more sensors and execute a protective measure.

Abstract: Methods and systems for conducting batch multi-effect distillation are disclosed. A multi-effect distillation system and one or more isolation devices are provided. A feed stream, consisting of water and a solute, is passed from a feed source into a brine side of the plurality of heat exchangers. The feed source is isolated from the plurality of heat exchangers by closing the one or more isolation devices. A first of the plurality of heat exchangers is heated by the heat source. A steam stream and a brine concentrate stream are produced in all but a last of the plurality of heat exchangers. A condensate stream from the steam stream is produced in all but the first of the plurality of heat exchangers. A warmed feed stream is produced in the last of the plurality of heat exchangers.