A hand vacuum cleaner has an air treatment chamber comprising an air inlet, an air outlet, a front end comprising a front door and a rear end. The front door is moveable between an open position in which the air treatment chamber is opened and a closed position. The air treatment chamber further comprises a stationary portion and a moveable portion, the moveable portion is moveable with respect to the stationary portion between an open position in which the air treatment chamber is opened and a closed position.

A hand vacuum cleaner has an air treatment chamber comprising an air inlet, an air outlet, a front end comprising a front door and a rear end. The front door is moveable between an open position in which the air treatment chamber is opened and a closed position. The air treatment chamber further comprises a stationary portion and a moveable portion, the moveable portion is moveable with respect to the stationary portion between an open position in which the air treatment chamber is opened and a closed position.

Aspects to facilitate dust collection are disclosed. In one aspect, a chute provides a dust seal between a bulk bag of material and a silo loading hatch. Here, the dust seal comprises a first seal between a first end of the chute and the bulk bag, and a second seal between a second end of the chute and the silo loading hatch. In another aspect, a collapsible chute is extended between a silo loading hatch and a discharge chute of a bulk bag such that the collapsible chute forms a dust seal between the silo loading hatch and the bulk bag. Contents of the bulk bag are released via the discharge chute so that the contents of the bulk bag flow into the silo loading hatch. For this embodiment, the dust seal prevents airborne dust associated with the flow from escaping into an exterior portion of the collapsible chute.

Aspects to facilitate dust collection are disclosed. In one aspect, a chute provides a dust seal between a bulk bag of material and a silo loading hatch. Here, the dust seal comprises a first seal between a first end of the chute and the bulk bag, and a second seal between a second end of the chute and the silo loading hatch. In another aspect, a collapsible chute is extended between a silo loading hatch and a discharge chute of a bulk bag such that the collapsible chute forms a dust seal between the silo loading hatch and the bulk bag. Contents of the bulk bag are released via the discharge chute so that the contents of the bulk bag flow into the silo loading hatch. For this embodiment, the dust seal prevents airborne dust associated with the flow from escaping into an exterior portion of the collapsible chute.

The present invention provides a nitrogen oxide ultra-low emission and carbon negative emission system and a control method, and the system comprises: a carbon negative emission system, a nitrogen oxide ultra-low emission system, an air supply device and a flow control module. The carbon negative emission system is used for enabling biomass to produce inorganic carbon and pyrolysis gas/gasification gas to realize negative emission of carbon; the nitrogen oxide ultra-low emission system is used for enabling fuel to be in mixed combustion with the pyrolysis gas/gasification gas to remove nitrogen oxides, which realizes ultra-low emission of the nitrogen oxides; the air supply device is in communication with biomass pyrolysis coupling partial gasification via a first pipeline, the air supply device is in communication with the carbon negative emission system and the nitrogen oxide ultra-low emission system via a second pipeline, and the pyrolysis gas/gasification gas enters the nitrogen oxide ultra-low emission system via the second pipeline; the flow control module controls a flow ratio of a pyrolysis agent/gasification agent entering the carbon negative emission system and flow of the pyrolysis gas/gasification gas and air entering the nitrogen oxide ultra-low emission system.

The present invention provides a nitrogen oxide ultra-low emission and carbon negative emission system and a control method, and the system comprises: a carbon negative emission system, a nitrogen oxide ultra-low emission system, an air supply device and a flow control module. The carbon negative emission system is used for enabling biomass to produce inorganic carbon and pyrolysis gas/gasification gas to realize negative emission of carbon; the nitrogen oxide ultra-low emission system is used for enabling fuel to be in mixed combustion with the pyrolysis gas/gasification gas to remove nitrogen oxides, which realizes ultra-low emission of the nitrogen oxides; the air supply device is in communication with biomass pyrolysis coupling partial gasification via a first pipeline, the air supply device is in communication with the carbon negative emission system and the nitrogen oxide ultra-low emission system via a second pipeline, and the pyrolysis gas/gasification gas enters the nitrogen oxide ultra-low emission system via the second pipeline; the flow control module controls a flow ratio of a pyrolysis agent/gasification agent entering the carbon negative emission system and flow of the pyrolysis gas/gasification gas and air entering the nitrogen oxide ultra-low emission system.

A power tool is provided including a having a field case portion and a gear case portion, a motor disposed in the field case portion of the housing, a fan rotatably connected to the motor, intake conduits disposed along the housing, and a particle separation assembly in fluid communication with the intake conduits. The particle separation assembly includes a baffle and a centrifugal chamber, where the baffle is operable to direct airflow from the intake conduits into the centrifugal chamber in a cyclonic path, and the centrifugal chamber includes a radial gap forming a particle dispersion port in the cyclonic path of the airflow to eject contamination from the airflow. Additionally or alternatively, the centrifugal chamber includes air-directing fins arranged angularly to direct contamination from the airflow towards the particle dispersion port.

A power tool is provided including a having a field case portion and a gear case portion, a motor disposed in the field case portion of the housing, a fan rotatably connected to the motor, intake conduits disposed along the housing, and a particle separation assembly in fluid communication with the intake conduits. The particle separation assembly includes a baffle and a centrifugal chamber, where the baffle is operable to direct airflow from the intake conduits into the centrifugal chamber in a cyclonic path, and the centrifugal chamber includes a radial gap forming a particle dispersion port in the cyclonic path of the airflow to eject contamination from the airflow. Additionally or alternatively, the centrifugal chamber includes air-directing fins arranged angularly to direct contamination from the airflow towards the particle dispersion port.

A dust sampling system including a dust sampler and a vehicle on which the dust sampler is placed. The dust sampler has a suction unit, a cyclone, a dust collection container, and an air intake conduit. The suction unit draws in air containing dust particles. The cyclone centrifugally separates the dust particles from the drawn-in air. The cyclone has an air input port, a particle discharge end, and an air output port connected to the suction unit. A dust collection container is positioned underneath the cyclone to receive the separated dust particles from the cyclone. The air intake conduit has an air inlet and an air outlet connected to the air input port of the cyclone. The suction unit draws in the air containing the dust particles into the air inlet of the air intake conduit while the vehicle moves to collect samples of fugitive dust from a road.

A filter cartridge for an air cleaner assembly is disclosed. The filter cartridge can include a media pack configured for installation into an air cleaner housing, the media pack extending along a longitudinal axis between opposite inlet and outlet flow ends, the media pack defining an outer perimeter. The filter cartridge can also include a circumferential shell surrounding at least a portion of the media pack outer perimeter. A radial flange extending from the circumferential shell proximate the media pack inlet end can also be provided. The flange can define a plurality of openings that are configured to receive protrusions on a housing body of the air cleaner assembly. The interaction between the protrusions and openings operates to ensure a secure seal between the housing body and the seal member.