Provided is a 3D printer having a residual powder removal device, including: a cabinet configured to form an exterior and protect a plurality of parts embedded therein, a chamber configured to form a printing space where a 3D part is formed by being irradiated with a laser from a laser irradiator inside the cabinet, a concentration measurer configured to measure a concentration of metal powder scattered inside the chamber, a powder transfer unit configured to transfer the metal powder from inside the chamber, and a residual powder removal device configured to spray an inert gas into the chamber to forcibly scatter cohered metal powder, discharge the metal powder scattered inside the chamber to the outside along with the inert gas, and cause the metal powder to pass through a filter assembly so that the metal powder is filtered and the residual metal powder is removed from inside the chamber.

A dust remover for a vacuum cleaner is provided inside a filter and is rotated by a motor. The dust remover includes: a rigid rotary member perpendicularly coupled to an output shaft of the motor to be rotated according to a rotation of the output shaft; a rotating buffer member assembled with an end portion of the rigid rotary member to be rotatable around a rotary shaft that is in parallel with the output shaft; a striking member having an end portion fixed to the rotating buffer member and another end portion contacting the filter; and an elastic member having an end portion coupled to the rotating buffer member and another end portion coupled to the rigid rotary member so as to apply an elastic recovery force to the rotating buffer member to rotate in a direction in which the rigid rotary member rotates.

A system for filtering a gas-solids mixture, comprises: a housing a separating body dividing the housing in a raw gas chamber and a clean gas chamber, the raw gas chamber being accessible via an inlet for the gas-solids mixture and the clean gas chamber comprising an outlet for discharging a cleaned gas; a number of filter elements suspended from the separating body; lower ends of the filter elements being connected to a support grid the support grid comprising a number of arms; one or more cleaning elements provided on the arms of the support grid for cleaning thereof.

A filter cylinder having a dust cleaning device of a dust collector is provided. The filter cylinder has a cylindrical outer frame. An HEPA filter is provided inside the filter cylinder. The inner wall of the filter is provided with a plurality of tabs arranged annularly. A cleaning device is disposed in the filter cylinder. The cleaning device includes a bracket. Two ends of the bracket are each provided with a flap member. The cleaning device is rotatable in the filter cylinder, with the flap member to flap the tab and further to vibrate the filter, so that the dust adsorbed to the filter drops from the filter to enhance the structural strength of the filter and to prolong the service life of the filter.

A filter cylinder having a dust cleaning device of a dust collector is provided. The filter cylinder has a cylindrical outer frame. An HEPA filter is provided inside the filter cylinder. The inner wall of the filter is provided with a collar. A cleaning device is disposed in the filter cylinder. The cleaning device includes a bracket. Two ends of the bracket are each provided with a flap member corresponding to the inner wall of the collar. The cleaning device is rotatable in the filter cylinder, with the flap member to flap the collar and further to vibrate the filter, so that the dust adsorbed to the filter drops from the filter to enhance the structural strength of the filter and to prolong the service life of the filter.

Industrial vacuum systems are disclosed, as are filter chambers for industrial vacuum systems and other filtration applications. The filter chambers in these systems use two distinct types of filtering elements within a single chamber, arranging the filter elements such that air cannot pass through a secondary filter element until the air has first passed through and been filtered by a number of primary filter elements. The airflow within the filter chamber may be essentially vertical, and the secondary filter element may be positioned above the primary filter elements. The filter chamber may also include an agitation system for cleaning the filtering elements. The agitation system may be constructed such that it can operate while the system is in use.

An embodiment is designed for and provided in a large commercial bakery setting which can typically make roll products such as but not limited to hamburger buns to filter air from a cleaning process. The invention can include for example one or more cage elements with a filter material that during operations takes a pleated shape upon the cage elements so as to filter particulate from the air. During a regenerative process the filter media is retained in such a way that it can easily reverse the pleats and force the removal of any compacted filtrate or debris from the pleats and any adhered materials on the filter media. The re-released materials are further collected in a fashion similar to the filtered material in a collection area below the filter assemblies. The invention entails the removal of these contaminants and their excess from pans and the like and filtration of the air and area around the cleaning of the pans from these particulates. Finally, a process employing a more efficient filtration system, providing a regenerative cycle, with a separated assembly divided design maximizing surface area for filtration and modulating the air to remove debris through the chamber separation and to spread air flows, and providing easy access for cleaning and maintenance of the filtration media is described.

An embodiment is designed for and provided in a large commercial bakery setting which can typically make roll products such as but not limited to hamburger buns to filter air from a cleaning process. The invention can include for example one or more cage elements with a filter material that during operations takes a pleated shape upon the cage elements so as to filter particulate from the air. During a regenerative process the filter media is retained in such a way that it can easily reverse the pleats and force the removal of any compacted filtrate or debris from the pleats and any adhered materials on the filter media. The re-released materials are further collected in a fashion similar to the filtered material in a collection area below the filter assemblies. The invention entails the removal of these contaminants and their excess from pans and the like and filtration of the air and area around the cleaning of the pans from these particulates. Finally, a process employing a more efficient filtration system, providing a regenerative cycle, with a separated assembly divided design maximizing surface area for filtration and modulating the air to remove debris through the chamber separation and to spread air flows, and providing easy access for cleaning and maintenance of the filtration media is described.

Shaker assemblies for dewatering slurries are disclosed. The shaker assemblies may include a positioning device which limits movement of the vibratory frame of the shaker assembly relative to a subframe when the vibratory frame is moved from a raised operating position to a lowered position. The positioning device may guide the vibratory frame as it is lowered from the raised position to the lowered position. In some embodiments, the shaker assembly includes a locking device for locking the vibratory frame to the subframe when the vibratory frame is in the lowered position.

Shaker assemblies for dewatering slurries are disclosed. The shaker assemblies may include a positioning device which limits movement of the vibratory frame of the shaker assembly relative to a subframe when the vibratory frame is moved from a raised operating position to a lowered position. The positioning device may guide the vibratory frame as it is lowered from the raised position to the lowered position. In some embodiments, the shaker assembly includes a locking device for locking the vibratory frame to the subframe when the vibratory frame is in the lowered position.