A multi-mechanism wet dust removal apparatus that circulates water and removes ambient dust, and a dust removal method. The multi-mechanism wet dust removal apparatus includes a dust collecting device, a dust settling and air-water separation device, a water circulating device, and a dust discharging device. The dust removal is achieved by dust collecting, dust settling, air-water separation and dust discharging. Water can be recycled and the dust removal method integrates multiple dust removal mechanisms.

A process where external fuel oil is used to wash entrained catalyst from a fluidized-bed propane dehydrogenation reactor effluent, where the fuel oil and catalyst mixture is returned to the reactor to provide the net fuel required for catalyst regeneration. Optionally the fluidized-bed propane dehydrogenation reactor effluent and the fuel oil are contacted in a direct contact inline device before entering a flash zone in the reactor vessel.

The present invention relates to a method for conditioning a soot-containing syngas stream in a single integrated apparatus containing a scrubbing vessel wherein particulate matter is decoupled from the waste water stream.

A flue gas cleaning solution purification system includes: a scrubber for removing contaminants from flue gas by using a cleaning solution; a cleaning solution purification unit for purifying the contaminated cleaning solution discharged from the scrubber; a cleaning solution resupply unit for resupplying the cleaning solution having been purified by the cleaning solution purification unit to the scrubber; and a sludge treatment unit for treating and storing sludge discharged from the cleaning solution purification unit, wherein the cleaning solution purification unit includes: a circulation buffer tank for temporarily storing the discharged contaminated cleaning solution; a coagulant supply apparatus for supplying a coagulant which coagulates contaminants of the contaminated cleaning solution discharged from the scrubber; a settling apparatus for primarily purifying the contaminated cleaning solution discharged from the scrubber by enabling settling of the contaminants; and a filtering apparatus for secondarily purifying the cleaning solution by filtering the contaminated cleaning solution to remove the contaminants.

Embodiments of a system and a method for preparing mold-resistant paper comprising a wet scrubber assembly in fluid communication with at least one collection plenum disposed at an operational area of a paper manufacturing line. The wet scrubber assembly can be operated to draw a stream of exhaust air from the operational area of the paper manufacturing line through the wet scrubber assembly to remove particulate from the exhaust stream. Such systems and methods can be used to produce mold-resistant paper by coating a paper with an antimicrobial composition including at least one antimicrobial additive at the calendering stage. The collection plenum can be placed in proximate relationship with the calendering stack such that the amount of antimicrobial additive particulate in the air at the calendering stage is reduced. The mold-resistant paper can be used in a gypsum panel.

A humidity control device includes: a storage unit that stores hygroscopic liquid that contains a hygroscopic substance; a vent that is provided in the storage unit; absorption means by which air and the hygroscopic liquid are brought into contact with each other and moisture contained in the air is absorbed by the hygroscopic liquid; an ultrasonic wave generation unit that irradiates at least a part of the hygroscopic liquid, which has absorbed the moisture, with an ultrasonic wave; and removal means by which an atomized droplet that is generated is removed from the hygroscopic liquid that has absorbed the moisture, in which the storage unit suppresses an outflow of a coarse droplet whose particle size is larger than that of the atomized droplet.

A filtering module includes a cyclone having a contaminated air inlet part into which external contaminated air and cleaning water cleaning the contaminated air are each introduced, and a cleaned air outlet part through which air cleaned by bringing the cleaning water into contact with the contaminated air is discharged; a water tank coupled to the cyclone, to which the cleaning water cleaning the contaminated air is introduced, and storing mixed water in which a pre-stored fluid and the cleaning water are mixed; and a fluid circulating part providing the mixed water stored in the water tank to the contaminated air inlet part.

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.

A process where external fuel oil is used to wash entrained catalyst from a fluidized-bed propane dehydrogenation reactor effluent, where the fuel oil and catalyst mixture is returned to the reactor to provide the net fuel required for catalyst regeneration. Optionally the fluidized-bed propane dehydrogenation reactor effluent and the fuel oil are contacted in a direct contact inline device before entering a flash zone in the reactor vessel.

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.