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

Abstract

The invention relates to an oxygen-controlled roasting device containing activated carbon carrier and catalyst. The discharge end of the rotary kiln is provided with an annular pipe for inputting nitrogen gas into the rotary kiln and several distribution pipes. The distribution pipe is a straight pipe, and the annular pipe is a circular pipe. Annular pipe fittings, a number of air holes with opening directions parallel to the kiln line of the rotary kiln are arranged at intervals on the circumferential surface of the annular pipe, and at least two gas injection pipes for injecting nitrogen to the material outlet are arranged at the discharge port of the discharge end of the rotary kiln. The invention provides nitrogen protection for the rotary kiln, so that the rotary kiln can be roasted in a low-oxygen concentration or oxygen-free environment, thereby preventing the carrier or catalyst containing activated carbon from igniting and burning at high temperature; meanwhile, by adjusting the frequency of the induced draft fan and nitrogen gas intake amount, so that the feed end has a stable slight positive pressure of 1~8Pa, and the discharge end maintains a slight negative pressure of ‑1~‑5 Pa to prevent oxygen from entering the rotary kiln from the feed end, and inject nitrogen at the discharge port to prevent oxygen from entering the rotary kiln The end enters the rotary kiln, realizing continuous industrial production.

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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