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.

The present disclosure provides a treatment device for an exhaust gas from rare earth calcination, comprising a spray apparatus in which a sprayer is arranged, the sprayer comprising an input pipe, a nozzle, a toothed ring, a rotating impeller, a first gear, and a second gear, wherein the input pipe is configured to input a spray liquid to the nozzle; wherein the nozzle is arranged to be more than one, rotatably connected to the input pipe, arranged in a ring shape. The treatment device enables more uniform contact between the exhaust gas and the spray liquid.

There is provided an exhaust gas processing apparatus configured to cause a processing gas to be exposed to or come into contact with a liquid and thereby detoxify the processing gas. The exhaust gas processing apparatus comprises a suction casing provided with an inlet which the processing gas is sucked into and with an outlet which the processing gas is flowed out from; a liquid tank configured to receive an outlet-side part of the suction casing and store the liquid therein; and one or multiple spray nozzles placed in the liquid tank. The outlet of the suction casing is arranged to be located above a liquid surface of the liquid stored in the liquid tank. The one or multiple spray nozzles are configured to spray the liquid from around the outlet of the suction casing to a peripheral part of the outlet.

This description relates to waste disposal garbage chutes and more particularly to automated air quality management in and around the disposal chute and collection rooms where garbage chutes are present utilizing automated air quality sensing hardware and evacuation devices to provide a clean, sanitary waste room environment. A system according to the present invention includes a 3 step design using an air sensor to determine air cleaning cycle, and an air intake port with specular reflective surfaces in the inside to provide a reflective element to reflect UV light into the airborne particulates thereby killing 99% of the bacteria and fungi before entering an electrified gravity fed fluid filament air filter which collects the dead bacteria and fungi and settles in a collection reservoir. The fluid in the reservoir is then further filtered to clean the fluid for reuse in the automated air cleaning system.

A method for processing a chemical stream includes contacting a feed stream with a catalyst in an upstream reactor section of a reactor having the upstream reactor section and a downstream reactor section, passing an intermediate product stream to the downstream reactor section, and introducing a riser quench fluid into the downstream reactor section, upstream reactor section, or transition section and into contact with the intermediate product stream and the catalyst to slow or stop the reaction. The method includes separating at least a portion of the catalyst from the product stream, passing the product stream to a product processing section, cooling the product stream, and separating a portion of the riser quench fluid from the product stream. The riser quench fluid separated from the product stream may be recycled back to the downstream reactor section, upstream reactor section, or transition section as the riser quench fluid.

An exhaust gas cleaning system comprises a first sub system including a scrubber unit comprising a scrubber arranged to wash the exhaust gas with a scrubber fluid, and a centrifugal separator arranged in communication with the scrubber unit for receiving the scrubber fluid after washing and separate it into a first and a second fraction, which second fraction is more polluted than the first fraction. The exhaust gas cleaning system further comprises a second sub system including a membrane filter arranged in communication with the centrifugal separator for receiving the first fraction output from the centrifugal separator and separating it into a third and a fourth fraction, which fourth fraction is more polluted than the third fraction. A method for cleaning exhaust gas onboard a ship involves cleaning an exhaust gas onboard a ship.

A process for recovering catalyst from a fluidized catalytic reactor effluent is disclosed comprising reacting a reactant stream by contact with a stream of fluidized catalyst to provide a vaporous reactor effluent stream comprising catalyst and products. The vaporous reactor effluent stream is contacted with a liquid coolant stream to cool it and transfer the catalyst into the liquid coolant stream. A catalyst lean vaporous reactor effluent stream is separated from a catalyst rich liquid coolant stream. A return catalyst stream is separated from the catalyst rich liquid coolant stream to provide a catalyst lean liquid coolant stream, and the return catalyst stream is transported back to said reacting step.

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.

Improved methods and systems are provided for the on-board removal of sulfur dioxide generated by a marine vessel. The method includes spraying an alkaline fluid into the flue gas to produce a saturated flue gas stream containing the alkaline fluid; and flowing the saturated flue gas stream containing the alkaline fluid through a venturi to cause the particulates in the flue gas to impact the alkaline fluid and react at least a portion of the sulfur dioxide with the alkaline fluid.

A process gas suction structure for preventing a generation of products from a process gas due to a temperature drop is disclosed. The process gas suction structure includes a double tube structure, and a heating device configured to heat the double tube structure. The double tube structure includes a process-gas flow passage portion where the process gas flows, and a partition portion arranged outside of the process-gas flow passage portion.