Bulletin . substances, but which isalso effective for dust, is of the rotary sort. In it, rotatingmasses, dipping into water, throw a continuous spray acrossthe chamber through which the gas must pass. Such acleaner is shown in Figure 6. The ribs on the drum Dcatch water in the bottom of the casing, throw it out bycentrilugal force, the gas meanwhile passing through theveils of mist at right angles. It is quite beyond the scopeof this paper to go into all the different kinds of cleanersand discuss their effectiveness. My object in showing afew is merely to indicate that gas cleaning is a very
Bulletin . substances, but which isalso effective for dust, is of the rotary sort. In it, rotatingmasses, dipping into water, throw a continuous spray acrossthe chamber through which the gas must pass. Such acleaner is shown in Figure 6. The ribs on the drum Dcatch water in the bottom of the casing, throw it out bycentrilugal force, the gas meanwhile passing through theveils of mist at right angles. It is quite beyond the scopeof this paper to go into all the different kinds of cleanersand discuss their effectiveness. My object in showing afew is merely to indicate that gas cleaning is a very im-. FlGURE 7. portant part of the preparation of coal made gas for engineuse, and unless mixture is made from clean gas the enginewill suffer. Returning now to the producer itself, Figure 7 indi-cates one form of up-draft producer. Through the coalbed L, air and steam are blown up through the center pipeK, which projects through the grate G and through a massof ash F, left on the grate. The passage of the air andsteam through the coal bed produces the gas, which issuesat a temperature somewhere near 1,000 degrees Fahren-heit. This hot gas impinges on tubes which superheat the steam on its way to the blower, which is of the injectorsort, and which is shown in the bottom center of the jet of steam entering this blower draws in air and themixed air and steam pass up around tlie tubes of the heatexchanger B, being heated thereby by the hot gas on itsway to the scrubber. In this way not only is the air steammixture supplied to the feed pipe K, but it is supplied in ahighly heated state a
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Keywords: ., bookcentury1900, bookdecade1, massachusettsinstituteoftechnology
