Methanol decomposition reactor based on waste heat of engine

Abstract

The invention discloses a methanol decomposition reactor based on the waste heat of an engine. According to the methanol decomposition reactor based on the waste heat of the engine, the waste heat of tail gas of the engine is used for heating methanol, so that the methanol is decomposed into a gas mixture of hydrogen, carbon monoxide and the like, and the gas mixture is introduced into a combustion chamber of the engine for combustion after decomposition. The methanol decomposition reactor comprises a shell body, a methanol pipe, heat exchange pipes, a pyrolysis gas outlet and the like. An outer shell of the reactor is wrapped with heat-insulation ceramic wool. A steel pipe is supported between an inner shell and the outer shell of the reactor. The methanol enters a decomposition chamber through the methanol pipe, and the decomposition chamber is filled with catalysts. The two ends of each heat exchange pipe are welded to ventilating pore plates. Baffle plates penetrate through the middle portions of the heat exchange pipes. Waste gas enters the heat exchange pipes via a waste gas inlet through the front ventilating pore plate so as to participate in heat exchange. According to the methanol decomposition reactor based on the waste heat of the engine, the waste heat of the tail gas exhausted by the engine is used for a methanol decomposition hydrogen production reaction, pollutant emission of the engine is reduced, the utilization rate of the waste heat of the engine is increased, and the energy efficiency of the engine is improved. The methanol decomposition reactor based on the waste heat of the engine is economical in use, reliable and long in service life and can be applied to the fields of automobiles, ships and the like.

Description

technical field [0001] The invention relates to a methanol cracking reactor utilizing engine waste heat, belonging to the field of engine waste heat utilization. Background technique [0002] Methanol is an oxygen-enriched, environmentally friendly and high-energy fuel. Its physical properties determine that methanol exists in liquid form at normal temperature and pressure. Compared with gasoline, methanol has a higher H / C and octane number, and a very wide range of lean burn, which allows the engine to use a higher compression ratio, and is a highly efficient fuel. Methanol molecules contain 50% oxygen, and the combustion speed is fast. Oxygen-supported combustion is sufficient, which can not only improve thermal efficiency, but also realize internal purification and reduce conventional gas emissions such as CO, HC and NOx. The production raw materials are extensive and abundant (such as low-quality coal, coke oven gas, domestic production waste, etc.), which is conducive ...

AI Technical Summary

Problems solved by technology

In order to take into account the heat exchange effect of the reactor and the strength of the shell, the existing engine waste heat recovery and utilization technology adopts a different material structure, which greatly increases the risk of air leakage at the weld; some technical solutions use the heat exchange tube to fill the catalyst, and the catalyst load The amount is small, and because methanol enters the tube in a liquid state, it is easy to wash off the catalyst particles; some technical solutions use electric heating plugs to assist heating, although the heat exchange of the reactor is enhanced, but it is easy to cause uneven heating of the reactor, which increases the control of the reaction. temperature difficulty

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