The following design methods for determining the major parameters of branched pipe distributors have been studied in gas-solid fluidized beds for uniform gas distribution. 1. To describe the effect of varying mass flow of gas

a momentum equation was introduced: where K is the momentum recovery factor. An empirical formula for factor K is suggested as follows: K=0. 6041-0. 1561 2. For the proper arrangement of the ejector tube diameters along the branched pipes so as to attain a uniform gas distribution

the resistance coefficient

of the side flow ejector tube was studied

yielding the following relations. where and (for q/d>3.8) where Re>2300 Re<2300 3. A design procedure for this type of gas distributor systems has been developed and was illustrated with an example.