The present invention discloses a dust removal device using expansion pressure. A dust removal device using expansion pressure according to one embodiment may comprise an inlet chamber allowing mixed air including dust to flow inside and including an outlet for discharging the dust downward; a dust collecting chamber disposed at a bottom of the inlet chamber and sealed in a state of communicating with the inlet chamber and the outlet to collect the dust discharged through the outlet; a supplying pipe entering into an inside of the inlet chamber and extending toward the outlet to supply the mixed air into the inlet chamber; a first blower providing a blowing force for sucking in the mixed air and supplying the mixed air through the supplying pipe; an air exhaust duct connected to communicate with the inlet chamber to guide air separated from the dust to be discharged to outside, wherein a communication part of the air exhaust duct, which communicates with the inlet chamber, has a certain size allowing the inlet chamber to generate an expansion pressure inside, and a second blower providing a blowing force to discharge the air inside the inlet chamber to the outside through the air exhaust duct, wherein the supplying pipe and the outlet are spaced apart from each other, and a separation distance between the supplying pipe and the outlet is longer than a range that the mixed air propelled from the supplying pipe can reach to, so that the expansion pressure of the mixed air supplied to the inlet chamber accelerates separation action caused by specific gravity difference between the air and the dust.

The present invention is a portable air purifier device intended to be attached to the belt or to the neck of the user and generate purified air enough to breath easily and adequate to make an air curtain to push a way ambient air. Principle of the operation of this device is to push inlet polluted air through layers of ionized water. Water will absorb particles and copper and silver ion kills possible air born bacteria and produce clean air. The purified air will be then delivered to the face of the user either by a flexible hose to a mask or through several flexible hoses to form an air curtain in front of a user's face.

According to one embodiment, a dust collection apparatus includes a liquid supplier, a first member, and a liquid recoverer. One end of the first member is connected to the liquid supplier, one other end of the first member is connected to the liquid recoverer. The first member is conductive. The first member has a first surface including a plurality of trenches.

An air cleaner not susceptible to a decrease in effect. The air cleaner includes: a storage tank that stores a liquid; and an air blowing unit. In the air cleaner, the storage tank has an air receiving region and a dust retention region formed therein, and the air blowing unit blows air to the air receiving region. The dust retention region is a region partitioned by a wall in which an opening is formed toward an upstream side of a flow of the liquid.

An oil-gas treatment system, an oil-gas treatment method and a mechanical apparatus are disclosed. The oil-gas treatment system includes an oil-gas separation device and a first oil-gas delivery device. The oil-gas separation device is configured to perform an oil-gas separation treatment on oil-gas generated by an oil-gas generation device, the oil-gas separation device includes a lubrication oil box for containing lubrication oil; the first oil-gas delivery device is communicated with the lubrication oil box and is configured to convey at least a part of the oil-gas into the lubrication oil box; the lubrication oil box is configured to separate the oil-gas conveyed into the lubrication oil box, and a separated oil product is left in the lubrication oil box.

A dust collection device and method for filtering powder from powder-filled air in a food product processing system. The dust collection device includes a venturi mixer having an inlet for receiving powder-filled air, a liquid inlet for receiving liquid, and a nozzle. The nozzle is arranged to eject the liquid into a mixing zone of the venturi mixer. The powder-filled air and the liquid meet in the mixing zone to form a liquid mixture. The dust collection device includes a chamber that receives the liquid mixture from the mixing zone, a recirculation line that feeds the liquid mixture back to the liquid inlet of the venturi mixer, and an air outlet that discharges air from the chamber.

A process and related plant are used for treating a raw vent gas containing bitumen vapours released by equipment of a polymer-bitumen membranes production line, in which operations involve a filler powder, such mixing the filler powder with the bitumen, during which the filler powder is incorporated into the raw vent gas that is initially powder-free. The process includes first conveying the raw vent gas into a gas-washing device along with a solution of a surfactant and then contacting the raw vent gas with the solution and removing the powder from the powder-containing gas. A purified vent gas that is substantially free from the filler powder is released. The purified vent gas is conveyed into a boiler, and the bitumen vapours are burned. The process prevents the powder from quickly reaching the boiler making the burner and the heat-exchange surfaces ineffective.

A liquid filter apparatus for gas/solid separation includes a housing with a filter chamber, a semiconductor process gas inlet, and a process gas outlet. The filter chamber forms a liquid reservoir, and the semiconductor process gas inlet and the process gas outlet are in communication with the filter chamber. The housing further includes a filter liquid inlet and a filter liquid outlet, which are in communication with the liquid reservoir for delivering and removing filter fluid, respectively, to and from the liquid reservoir.