Gravity-flow type efflux technology of condensate of coal gas primary cooler

Abstract

The invention relates to a gravity-flow type efflux technology of condensate of a coal gas primary cooler, a liquid flow direction selector is arranged on an upper-section oil return pipeline, two ends of the liquid flow direction selector are communicated with a cross-pipe primary cooler and a circulating oil tank respectively, an automatic regulating valve is series-connected at the end of connecting the liquid flow direction selector with the cross-pipe primary cooler through a pipeline, and the two ends of the automatic regulating valve are communicated with the cross-pipe primary cooler and a mechanized settling tank respectively; the mounting position of the liquid flow direction selector is higher than a horizontal part of the upper-section oil return pipeline; the automatic regulating valve is sequentially connected with a PLC program controller, a liquid level meter and the circulating oil tank by using signal lines; and the automatic efflux of the condensate can be realized by utilizing the height difference between the upper-section oil return pipeline and the mechanized settling tank and the liquid flow direction selector, thereby reducing loads of a circulating spray pump, stabilizing the circulating spray volume and simultaneously utilizing the automatic regulating valve for regulating the efflux volume for further controlling the liquid level of the circulating oil tank. The gravity-flow type efflux technology has simple structure, and convenient mounting and regulation, and can effectively reduce the energy consumption, stabilize the operation of the primary cooler and avoid the environmental pollution.

Description

Technical field [0001] The invention relates to an auxiliary process technology in the purification and production of coal gas in the coking industry, in particular to a self-flowing venting process for condensate of a gas primary cooler. Background technique [0002] During the initial cooling process of coke oven gas in the coking industry, the gas is cooled from 80°C to about 20°C. Due to the decrease in temperature, a large amount of condensate will be produced. The gas in the upper stage of the primary cooler is cooled from 80°C to 45°C, so the main condensate is In the upper stage, a large amount of naphthalene will be precipitated at the same time. In order to avoid the blockage of the primary cooler by naphthalene crystallization, circulating oil, such as light tar, must be sprayed in the primary cooler in two stages, while the excess condensate is drained outside. [0003] In the prior art, the well-known primary cooler condensate draining process (see figure 2 ), is to us...

AI Technical Summary

Problems solved by technology

This structure has the following disadvantages: using the pump’s delivery capacity to discharge condensate, the energy consumption increases; the pump’s delivery capacity is fixed, and the discharge volume fluctuations cause the cycle spraying volume to fluctuate, which is not conducive to stable operation; the condensate cannot be discharged during power failure, The condensate continues to enter the circulating oil tank, which is prone to overflow and cause environmental pollution

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