Tonite, I need to read and learn about the following engineering ebook ------ You should find all you want in the "Handbook of Pneumatic Conveying Engineering" (written by myself and two colleagues) and published last year by Marcel Dekker. Chapter 13 is devoted to the pneumatic conveying of "Cement and Drilling Mud Powders". This includes conveying data on barite, bentonite, and oil well and OP cements. Figure 13.12 gives data for barite conveyed through a four inch single bore pipeline of similar length to yours and shows that with an air supply pressure of 35 psig and 200 cfm you will get about 80 ton/h (using a top discharge blow tank). With a five inch bore pipeline and a higher air supply pressure you should achieve the flow rates that you require with all three materials. The 200 cfm in the above case is the total air flow rate. Part of this air flow is directed to the blow tank and the rest is introduced into the pipeline immediately after the blow tank. This is the means of controlling the discharge rate from the blow tank and this is covered in Chapter 2. The 80 ton/h in the above case is the steady state flow rate. As mentioned in the previous reply, you must also consider the size, number, valving arrangements and cycling frequency of the blow tank to achieve your 80 to 120 ton/h on a time averaged mean basis. A review of these options is also given in Chapter 2.
Posted on: Wed, 24 Jul 2013 16:28:47 +0000
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