Dryer regeneration gas heater system

Abstract

The invention discloses a dryer regeneration gas heater system, which comprises a gas source, a heat exchanger and a dryer; a gas outlet of the gas source is communicated with a material inlet of the heat exchanger; a material outlet of the heat exchanger is communicated with an air inlet of the dryer; a material inlet of the heat exchanger is also provided with a propane pipeline, and propane is introduced into a gas inlet of the propane pipeline; a gas outlet of the gas source is connected with a one-way valve, and the propane pipeline is also provided with the one-way valve; dry gas provided by the gas source is heated through the heat exchanger, the heating effect is guaranteed, substances such as water and hydrogen sulfide are removed from the heated dry gas through the dryer, it is guaranteed that follow-up production is not affected, and the requirements for the regenerated gas amount and temperature are better met; the propane pipeline is arranged at the inlet of the heat exchanger, so that the production load of the PDH device in the initial working stage is reduced, and the PDH device can enter a stable production state more quickly; and through the one-way valve, the flow direction of the gas is better controlled, and a better heating effect is ensured.

Description

technical field [0001] The invention relates to the field of heaters, in particular to a drier regeneration gas heater system. Background technique [0002] Propylene is an important basic chemical raw material, widely used in the production of polypropylene, cumene, carbonyl alcohol, propylene oxide, acrylic acid, acrylonitrile and other chemical products. The process of preparing a dehydrogenation catalyst containing cerium oxide in the prior art is to mix cerium nitrate with compounds of elements such as iron, potassium, molybdenum, and some additives, and then obtain a finished dehydrogenation catalyst after kneading, calcination, etc., the original The cerium nitrate in the mixture undergoes a decomposition reaction during the calcination process, and finally forms the active component cerium oxide in the dehydrogenation catalyst. At present, the supply of propylene mainly comes from the by-products of naphtha cracking to ethylene and heavy oil catalytic cracking. How...

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Problems solved by technology

The regeneration medium is designed to be the dry gas produced by the device itself. The dry gas is heated by the dryer regeneration gas heater E6105 and flows through two dryers to desorb and remove the water and hydrogen sulfide adsorbed in the bed at high temperature; but the device starts In the initial stage, it was in low-load operation, the self-produced dry gas was insufficient, and there was no high-pressure steam generation, which could not meet the regeneration gas volume and temperature requirements

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