METHOD FOR REGENERATION OF COKED CATALYST AND UNIT FOR ITS IMPLEMENTATION Russian patent published in 2017 - IPC B01J38/22 

FIELD: oil and gas industry.

SUBSTANCE: method comprises combusting coke by contacting the catalyst with circulating oxygen-containing gas, the process is carried out in a catalytic reactor with temperature control in the catalyst in stages on the moving belt conveyor of the reactor, where coked catalyst is preliminarily distributed in sections. In the two first sections, evaporation from the catalyst pores of volatile hydrocarbons which are sent to combustion furnace for generation of flue gases is carried out, preliminarily ensuring their purification from dust, the coke is burned in subsequent sections on the surface of coked catalyst, and residual oxygen is removed from flue gas heated in furnace to t=900°C-1100°C to value less than or equal to 1% of volume, the flue gas is cooled to t less than or equal to 500°C and fed into the sections of the catalytic reactor, preliminarily mixing it with air, and the flue gases from the catalytic reactor are purified successively from sulfur compounds with alkali solution and dust particles with water, the temperature control is carried out by difference of temperatures before and after each controlled layer of catalyst, determining mean geometric difference of temperatures ΔT_cp = f (G_S, G_a) where G_S is volume of flue gas, G_a is volume of air. The unit for regeneration of coked catalyst includes catalyst regeneration furnace made in the form of a belt conveyor divided into sections enclosed in a metal box in its lower part comprises is a regenerated catalyst hopper and inlet caps for supplying a mixture of flue gases and atmospheric air to the belt conveyer sections which are connected along the pipeline in series to combustion furnace, the first inlet of which receives flue gas heated by a first smoke exhauster, a chemisorption oxygen filter, a first cooler, and along the other pipeline- with a blower, and in the upper part of the box there is a hopper of coked catalyst including a dosing unit for introducing the catalyst onto the belt conveyor with adjustable gap, and outlets of exhaust gas from sections of the belt conveyor. The outlets of two first sections in the way of motion of the conveyer are connected by pipeline to dust-cleaner and through a third smoke exhauster to third inlet of the gas combustion furnace, and the outlets of the following sections are connected by a pipeline serially to the second smoke exhauster, the second cooler, the apparatus of alkaline jets, water jet apparatus and smoke stack, under which there is a tank for collecting condensate, between the sections of belt conveyor there are projections closing the gaps between the sections, and each section is equipped with temperature sensors, four of which are installed below the belt at the inlet of gases and other four are above the belt at the outlet of gases.

EFFECT: usage of proposed method and the unit for regeneration of coked catalyst increases regeneration efficiency of coked catalyst by burning maximum amount of coke from its surface with minimal loss of catalyst mass and maximal recovery of its activity.

2 cl, 1 dwg