Thermally coupled negative pressure debenzene and regeneration integrated device

Abstract

The invention discloses a thermal coupling negative pressure debenzolizing and regenerating integrated device which comprises a regenerating vacuum system. The regenerating vacuum system comprises a debenzolizing regeneration tower, a regenerating condensation cooler, a regenerating noncondensable gas cooler, a regenerating oil washing tank and a regenerating vacuum pump, wherein the debenzolizing regeneration tower comprises a debenzolizing device, a regenerating device and a thermal lean oil tank; the debenzolizing device, a debenzolizing regenerating tubular furnace, a debenzolizing circulating lean oil pump, the bottom of the thermal lean oil tank, a thermal lean oil pump and a lean and rich oil heat exchanger are sequentially connected; the debenzolizing regenerating tubular furnace and a regenerating built-in heater are connected with the debenzolizing device; the regenerating device is connected with a residual oil pump which is connected with a tar storage tank, the regenerating device is connected with the regenerating condensation cooler, the regenerating oil washing tank is connected with the regenerating noncondensable gas cooler, the regenerating noncondensable gas cooler is connected with the regenerating oil washing tank, and the regenerating noncondensable gas cooler is connected with the regenerating vacuum pump. The device disclosed by the invention solves the problems of a tubular furnace that the oil washing temperature is overhigh, oil washing polymerization is great, the consumption is high and the energy consumption is high.

Description

technical field [0001] The invention relates to the technical field of coking and chemical industry, in particular to a heat-coupled negative pressure debenzene and regeneration integrated device. Background technique [0002] Crude benzene is a by-product in the coking process of the coke oven. It is an important coking chemical product and has a wide range of uses. Coke oven gas generally contains 25-40g / m of crude benzene 3 . The methods for recovering crude benzene from coke oven gas include oil washing absorption method, activated carbon adsorption method and deep condensation condensation method. Among them, the oil washing absorption method has been widely promoted because of its simple process, economical reliability. After the coke oven gas is cooled to 25-27°C by the final cooling tower, it passes through two oil washing absorption towers (also called benzene washing towers) to absorb crude benzene in the gas. The washing oil after absorbing and loading crude be...

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Problems solved by technology

[0007] The purpose of the present invention is to solve the above-mentioned problems existing in the prior art, and to provide a thermally coupled negative pressure debenzene and regeneration integrated device; The heat source fundamentally cancels the regenerative heating tubular heating furnace, and the debenzene regeneration adopts an integrated structure, which completely overcomes the existing negative pressure debenzene regeneration method, such as the high temperature of the washing oil heated by the tubular furnace, the large aggregation of the washing oil, and the The problem of high consumption, large energy consumption, and the disadvantages of complex construction and high operating costs of the regeneration system

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