Dispersion lance for dispersing a treating agent into a fluid stream

In combination with a fluid treatment system which includes a flow duct in which a fluid stream flowing through the duct is mixed with a treating agent;

• a dispersion lance for dispersing the treating agent into said fluid stream, comprising:
• a pipe mounted in said duct with its axis approximately transverse to the direction of the fluid stream flow, said pipe having a series of openings along its length for injecting a treating agent supplied to said pipe into the fluid stream;
• a baffle extending lengthwise along said pipe, said baffle having a cross-section the central portion of which is V-shaped, with the apex of the V facing upstream of the fluid stream flow, and with generally flattened wing portions extending from the legs of the V beyond the sides of said pipe in a direction where they transversely intersect the stream flow, the said wings forming an angle of less than 180.degree. with respect to the legs of the said central portion;
• the said baffle acting to generate a low pressure zone on its downstream side which enhances turbulence in the fluid;
• and wherein the openings of said pipe are located to inject said treating agent into the said low pressure zone to better distribute and intermix the injected treating agent into the surrounding fluid.