Coke oven offtake piping system

Abstract

A coke oven piping system (10) comprises a pipe assembly for conveying coke oven gases (14) from a coke oven to a collecting main (16); and flow control means comprising a flow orifice (22) in the pipe assembly with an associated obturating member (20), the obturating member being axially moveable between an open position at a certain distance from the flow orifice to a closed position in which it substantially obstructs the flow orifice (22). At least one throttling opening (28) is arranged so as to offer, towards the end of the closing stroke of the obturating member (20), an opening area for the gases to the collecting main (16) that depends on the axial position of the obturating member (20).

Description

technical field [0001] The present invention relates generally to coke oven construction and more particularly to coke oven discharge piping with integrated flow control valves for regulating the flow of untreated gas from each individual coking chamber to the accumulation tube. Background technique [0002] Traditionally, in a coking plant comprising a bank of coke ovens, the untreated gases (distillate gas and steam) from each individual oven are directed through discharge pipes to accumulation pipes, which typically run throughout the battery of coke ovens. the entire length. The discharge piping itself usually consists of a standpipe (also known as a standpipe or riser) extending upwards from the furnace roof, and a gooseneck, ie a short bend that communicates with the top of the standpipe and leads to the accumulation pipe. One or more nozzles are provided in the gooseneck to cool the raw gas from about 700-800°C to a temperature of about 80-100°C. [0003] In order t...

AI Technical Summary

Problems solved by technology

Although the valve is a reliable design, it does not provide a great improvement in flow rate control

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