A thermal power plant exhaust purification device, the device including a cooling substance flow channel and an exhaust flow channel; the device also includes a spacing member for spacing and exchanging heat between the cooling substance flow channel and the exhaust flow channel, the spacing member having an exhaust contact surface for collecting dust and/or mist contained in the exhaust; the cooling substance flows in the cooling substance flow channel, such that the condensate precipitated from hot exhaust uniformly adheres on the exhaust contact surface, thus forming a uniform and stable water film; on one hand, formation of the concentrated H.sub.2SO.sub.4 on a dust collecting plate is prevented, and a liquid film flows downwards under gravity, thereby cleaning the H.sub.2SO.sub.4 adhered on the dust collecting plate timely; on the other hand, the water film is very effective in intercepting droplets and capturing the dust.

A thermal power plant exhaust purification device, the device including a cooling substance flow channel and an exhaust flow channel; the device also includes a spacing member for spacing and exchanging heat between the cooling substance flow channel and the exhaust flow channel, the spacing member having an exhaust contact surface for collecting dust and/or mist contained in the exhaust; the cooling substance flows in the cooling substance flow channel, such that the condensate precipitated from hot exhaust uniformly adheres on the exhaust contact surface, thus forming a uniform and stable water film; on one hand, formation of the concentrated H.sub.2SO.sub.4 on a dust collecting plate is prevented, and a liquid film flows downwards under gravity, thereby cleaning the H.sub.2SO.sub.4 adhered on the dust collecting plate timely; on the other hand, the water film is very effective in intercepting droplets and capturing the dust.

The prevent invention addresses the problem of providing a filter cloth for a bag filter, which has excellent collection efficiency, has excellent collection efficiency, provides low pressure drop and is resistant to clogging, and also has excellent dust-off ability; a method for producing the same; and a bag filter. As a means for resolution, a nonwoven fabric containing an ultrafine fiber having a fiber diameter D of 200 to 2,000 nm is laminated on a base material to form a filter cloth for a bag filter.

The prevent invention addresses the problem of providing a filter cloth for a bag filter, which has excellent collection efficiency, has excellent collection efficiency, provides low pressure drop and is resistant to clogging, and also has excellent dust-off ability; a method for producing the same; and a bag filter. As a means for resolution, a nonwoven fabric containing an ultrafine fiber having a fiber diameter D of 200 to 2,000 nm is laminated on a base material to form a filter cloth for a bag filter.

A vacuum cleaner including a suction inlet, a conduit in fluid communication with the suction inlet, a filter having a valve releasably connected to a filter inlet, the filter configured to collect debris drawn through the suction inlet. The vacuum cleaner further comprising a release mechanism moveable from a first position to a second position. In the first position, the filter is in fluid communication with the conduit to collect debris with the valve being open, and in the second position, the filter is disconnected from the conduit with the valve being closed. Movement of the release mechanism between the first and second positions closes the valve.

A vacuum cleaner including a suction inlet, a conduit in fluid communication with the suction inlet, a filter having a valve releasably connected to a filter inlet, the filter configured to collect debris drawn through the suction inlet. The vacuum cleaner further comprising a release mechanism moveable from a first position to a second position. In the first position, the filter is in fluid communication with the conduit to collect debris with the valve being open, and in the second position, the filter is disconnected from the conduit with the valve being closed. Movement of the release mechanism between the first and second positions closes the valve.

A pneumatic conveyance system includes at least one filtration component and a cage assembly disposed within the filtration component. The cage assembly may include a first cage, a second cage, and an actuator, where the actuator may be configured to move the first cage relative to the second cage and cause at least a portion of the first cage to rub against a filtration component within the pneumatic conveyance system. A method of dislodging material buildup within a pneumatic conveyance system includes causing a first cage of a cage assembly to move relative to a second cage within a filtration component.

A pneumatic conveyance system includes at least one filtration component and a cage assembly disposed within the filtration component. The cage assembly may include a first cage, a second cage, and an actuator, where the actuator may be configured to move the first cage relative to the second cage and cause at least a portion of the first cage to rub against a filtration component within the pneumatic conveyance system. A method of dislodging material buildup within a pneumatic conveyance system includes causing a first cage of a cage assembly to move relative to a second cage within a filtration component.

Systems and methods for automatic control of a baghouse fabric filter system as a single unit to maintain a consistent pressure drop are disclosed. The fabric filter system may be a pulse jet cleaning system, and a controller may be provided to receive inputs from pressure sensors and other components and to control activation of pulse pipes for cleaning filter bags. The controller may adjust parameters including the dwell time between pulses, the duration of each pulse, and the pulse air pressure. The controller may further optimize these parameters to provide the minimum cleaning necessary per pulse to achieve the consistent differential pressure. By continuously adjusting the parameters, the system maintains the maximum amount of filter cake on the bags to promote optimal emissions control performance.

A fabric filter for separating particulate matter from a gas stream includes a filter compartment and an inlet opening for delivering at least a portion of the gas stream to the filter compartment. The fabric filter further includes one or more filter elements within the filter compartment and a louver assembly for providing access for the at least a portion of the gas stream to said filter compartment. The louver assembly has a first louver associated with the inlet opening and movable between a first-louver-first position and a first-louver-second position. The louver assembly has a second louver associated with the inlet opening and movable between a second-louver-first position and a second-louver-second position. The first louver and the second louver are movable independent of each other to facilitate or restrict fluid communication through said opening.