The experience in the exploitation of traditional standpipes for the gases leaving coke ovens has shown that they have a number of substantial drawbacks [1-6]. The main shortcoming is the intense tar-carbon-graphite deposition on the inner curvilinear surface of the valve box and on the valve surface. The deposition of tarry matter and 'free carbon" on the inner surface of standpipes requires a large amount of manual labor for cleaning the valve unit from carbon-graphite deposits or the complete replacement of valve boxes unsuitable for further use [4-6]. The process of accumulation of tar-carbon-graphite deposits, if prompt measures for their removal are not taken in due time leads to the filling of the entire tract for the offtake of the gas in the standpipe, which makes the suction of the gas from the coke oven difficult and creates conditions for the entry of water into the oven. Moreover, the clogging of the bends of standpipes, valve boxes and the spray system, and the deformation of the gas-offtake equipment contribute to the rapid plugging and failure of the tar box.
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