Diffuser (sewage)

About: Diffuser (sewage) is a research topic. Over the lifetime, 6487 publications have been published within this topic receiving 40404 citations.

Diffuser wall control

Abstract: In a motor driven centrifugal compressor having a diffuser containing a movable wall for varying the width of the diffuser passage, control equipment is provided for continually changing the wall position in response to changes in motor current.

Diffuser and an aeration apparatus equipped with such a diffuser

Abstract: A diffuser for an aeration apparatus includes a cylindrical body having an outer surface and an inner surface defining a blind bore. The blind bore has an open attachment end adapted for connection to a conduit and a closed impaction end. The body has radial slots, whereby fluids are diffused radially from the body through the slots. The diffuser, as described above, has proven to be effective for use in aeration of water for aquaculture.

Split flame burner for reducing NOx formation

Abstract: An improved pulverized coal burner that reduces the formation of nitrogen oxides. The coal burner includes fuel splitters that separate a mixture of primary air and coal into a plurality of streams while the mixture is discharged through a diffuser having a plurality of partially open areas and a plurality of blocked areas. After passing through the diffuser, the plurality of streams are discharged into a furnace to be burned. The plurality of partially open areas and blocked areas are created by removing sections of the diffuser and replacing the removed sections with fuel spiders. Creation of these discrete streams delays mixing with secondary air. Because primary air is supplied in sub-stoichiometric quantities, the coal in these split streams will be burned under fuel-rich conditions for the first 100 to 200 milliseconds of combustion, until the delayed mixing of secondary air occurs. Combustion in a fuel-rich environment retards formation of nitrogen oxides in two ways. First, nitrogen that is part of the volatile matter that is evolved during the ears stages of combustion will tend to form molecular nitrogen rather than react with oxygen to form nitrogen oxides. Second, an oxygen deficiency will reduce formation of nitrogen oxides from atmospheric nitrogen. Two variations of bypass conduits are disclosed that allow a portion of the mixture of primary air and coal to bypass the diffuser and discharge into the furnace.

Diffuser for hair dryer

Abstract: A diffuser to diffuse the air blast of a hair dryer may be embodied as a removable accessory for existing hair dryers or an integral feature in a hair dryer. A tubular member includes a first end to receive the output of the hair dryer, and a diffuser plate is pivotally secured in the opposed, second end of the tubular member. The diffuser plate is rotatable from a fully open position in which the entire output of the dryer blower is delivered from the second end, to a fully closed position in which the second end is blocked by the diffuser plate. The diffuser plate includes a plurality of holes in a spaced array, permitting a fraction of the dryer output to be delivered from the second end of the tubular member at a reduced velocity. The tubular member includes a plurality of vent holes disposed upstream of the diffuser plate to exhaust a substantial portion of the air flow when the diffuser plate is closed to the attenuating position. The diffuser plate is mounted on a pivot shaft, in the fashion of a choke valve, and an actuating lever translates a link joined to a lug on the end of the pivot shaft. Alternatively, a gear is secured to the end of the pivot shaft, and an actuating slide engages the gear in rack and pinion fashion to rotates the shaft and diffusion plate from the fully open to fully closed position.