A Methanol-Hydrogen Production System with Stable Reactor Feed Temperature

Abstract

The invention relates to a system for producing hydrogen by methanol and having a reactor with stable feeding temperature. The system comprises an oil pump, a first heat transfer oil heating furnace, a first heat exchanger, a first reaction module, a second heat transfer oil heating furnace, a second reaction module and a second heat exchanger which are interconnected orderly through a heat transfer oil pipeline; the first heat exchanger and the second heat exchanger, as well as the first heat exchanger and the first reactor, the first exchanger and the second reaction module are communicated with each other through a raw material delivery pipe; the reaction raw materials are heated orderly through heat transfer oil flowing through the second heat exchanger and the first heat exchanger and then delivered to the first reaction module and the second reaction module at the same time. The methanol hydrogen production system has the advantages that raw materials are heated in a grading manner through two heat exchangers, the temperature is stable when materials enter the reactor, and the reaction product quality is good; the heat transfer oil is heated by two sections of two heaters, the heater power can be reduced, and the coking caused by too high temperature of the heat transfer oil is avoided.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a methanol hydrogen production system with stable feed temperature of a reactor. Background technique [0002] In order to reduce energy consumption and cost in chemical production, and to replace the process of "electrolysis of water to produce hydrogen" known as "electric tiger", hydrogen production from methanol has become an important method to obtain high-purity hydrogen. Methanol and water vapor pass through the catalyst under certain temperature and pressure conditions. Under the action of the catalyst, methanol cracking reaction and carbon monoxide conversion reaction occur to generate hydrogen and carbon dioxide. This is a multi-component, multi-reaction gas-solid catalytic reaction. system. The steam reforming of methanol is an endothermic reaction, and the reaction temperature of the existing methanol hydrogen production plant is generally controlled by th...

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Problems solved by technology

Steam reforming of methanol is an endothermic reaction, and the reaction temperature of the existing methanol hydrogen production plant is generally controlled by the raw material gasifier and the heat conduction oil heating furnace of the reactor (such as figure 1 as shown, figure 1 The number 11 on the right side of the center is the raw material gasifier), that is, the raw material is passed into the reactor after being gasified by the raw material gasifier, and the reactor is supplied with the heat required for the reaction by the heat-conducting oil heated by the heat-conducting oil heating furnace. In actual operation During the process, the feed temperature at the inlet of the reactor fluctuated greatly, which made it difficult to control the bed temperature of the reactor, and the reaction product could not meet the expected requirements.

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