Oxygen-controlled roasting device and method for activated carbon-containing carrier and catalyst

Abstract

The invention relates to an oxygen-controlled roasting device and method for an activated carbon-containing carrier and a catalyst. An annular pipe for inputting nitrogen into a rotary kiln and a plurality of distribution pipes are arranged at the discharging end of the rotary kiln; the distribution pipes are straight pipes; the annular pipe is aring-shaped pipe; a plurality of air holes are formed in the circumferential surface of the annular pipe at intervals, the hole opening direction of the air holes is parallel to the kiln line of the rotary kiln; and at least two gas ejector pipes used for ejecting nitrogen to a material outlet are arranged at the discharging opening of the discharging end of the rotary kiln. Nitrogen protection is provided for the rotary kiln, so that the rotary kiln can perform roasting in a low-oxygen-concentration or oxygen-free environment, and the activated carbon-containing carrier or catalyst is prevented from being ignited and combusted at a high temperature; and meanwhile, by adjusting the frequency of an induced draft fan and a nitrogen inflow amount, the micro-positive pressure of a feeding end is stabilized to be 1-8 Pa, the micro-negative pressure of the discharging end is kept to be -1 - -5 Pa, and thus, oxygen is prevented from entering the rotary kiln from the feeding end; the nitrogen is sprayed at the position of the discharging opening, the oxygen is prevented from entering the rotary kiln from the discharging end; and continuous industrial production is achieved.

Description

technical field [0001] The invention relates to the technical field of catalyst preparation, in particular to an oxygen-controlled roasting device and method containing an activated carbon carrier and a catalyst. Background technique [0002] Activated carbon has a high water absorption rate. When used as a catalyst carrier, it needs to be fully roasted after drying to remove water. On the one hand, it decomposes the precursor into the active phase and activates it. On the other hand, it strengthens the interaction between the active phase and the carrier. More evenly attached to the carrier surface. [0003] In the process of roasting the activated carbon carrier and the carrier containing the activated carbon carrier, if the temperature exceeds a certain range (for example, 400°C), the carrier or catalyst will easily burn and be scrapped. At present, in the laboratory, the method of introducing inert gas is usually used to make the roasting proceed in an oxygen-free or lo...

AI Technical Summary

Problems solved by technology

However, in industrial production, when large-scale roasting equipment is used, on the one hand, the roasting equipment has a large inlet, outlet, and auxiliary equipment connected to the outside world, so it is difficult to meet the requirements of anaerobic or low oxygen, and roasting The inert gas inside the equipment is unevenly distributed, which is prone to local combustion and fire; on the other hand, in order to prevent air from entering the roasting equipment, the roasting equipment is usually not suitable for industrial continuous production

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