A dispenser for mixing and dispensing a liquid chemical concentrate with a dilutent from a container. The dispenser includes two slideable eductors one of which is also rotatable. Both a high and low flow rate can be obtained with simultaneous adjustment of concentration of the chemical concentrate. The dispenser has a high degree of accuracy of the amount of dilution of the chemical concentrate as well as positive positioning of the high and low flow rate.

A dispenser for mixing and dispensing a liquid chemical concentrate with a dilutent from a container. The dispenser includes two slideable eductors one of which is also rotatable. Both a high and low flow rate can be obtained with simultaneous adjustment of concentration of the chemical concentrate. The dispenser has a high degree of accuracy of the amount of dilution of the chemical concentrate as well as positive positioning of the high and low flow rate.

The present invention relates to a tail gas treatment system as well as method for lowering nitrogen oxides content from the tail gas. The tail gas treatment system includes a tail gas main pipe carrying a tail gas and a tail gas bypass pipe. The treatment system also includes a centrifugal venturi sparger assembly arranged at an end of the tail gas bypass pipe. The centrifugal venturi sparger assembly extends at least substantially in the tail gas main pipe. The centrifugal venturi sparger assembly includes a vacuum venturi generator and a hollow sparger tube. The treatment system further includes a catalytic reactor to reduce nitrogen oxides content of the tail gas by catalytic reduction.

A venturi is provided herein that includes a tubular passageway, a pod, a first entry point, and a second entry point. The pod may be positioned and contained within the tubular passageway. The first entry point may introduce a first media into the venturi, and a second entry point may introduce a second media into the venturi. The first media and second media may be any media, including fluid or gas. The first media may mix with the second media to develop a mixed media, and the mixed media may flow around the pod. The pod may translate axially within the tubular passageway via a translation rod and a spring. The spring may cause the pod to translate axially based on a pressure of the fluid entering the venturi.

The present invention relates to a tail gas treatment system as well as method for lowering nitrogen oxides content from the tail gas. The tail gas treatment system includes a tail gas main pipe carrying a tail gas and a tail gas bypass pipe. The treatment system also includes a centrifugal venturi sparger assembly arranged at an end of the tail gas bypass pipe. The centrifugal venturi sparger assembly extends at least substantially in the tail gas main pipe. The centrifugal venturi sparger assembly includes a vacuum venturi generator and a hollow sparger tube. The treatment system further includes a catalytic reactor to reduce nitrogen oxides content of the tail gas by catalytic reduction.

A flammable gas diluter includes: a dilution vessel comprising an outer envelope defining a longitudinal flow passage from an inlet to an outlet; at least one air inlet for directing a flow of air into the inlet of the diluter; and a flammable gas inlet arrangement. The dilution vessel has a plurality of gas flow directing formations arranged between the flammable gas inlet arrangement and the outlet, each being at a different position along a length of the dilution vessel. At least one of the plurality of gas flow formations is an inwardly directing gas flow formation for directing gas flow away from the outer envelope and at least one of the gas flow formations is an outwardly directing gas flow formation for directing gas flow towards the outer envelope.