A power generation method and power generation device based on methanol steam reforming system

Abstract

The invention discloses a methanol steam reforming system based power generation method and device. The method includes: firstly, mixing methanol and water with air, and allowing the mixture to enter a reformer for reforming reaction and water gas conversion reaction; allowing the mixed gas subjected to reaction to enter a membrane separation system to have high-purity hydrogen separated; allowing other gases from the membrane separation system and hydrogen unreacted in a fuel cell to enter a burner to be burnt with the air to release heat for a heat exchange to use to enable raw materials to reach reforming temperature; feeding the generated hydrogen to a buffer tank prior to the fuel cell to have power generated. With the method, problems about safety and the situation that the hydrogen cannot be supplied to the fuel cell in time are solved, the hydrogen needed by the positive electrode of the fuel cell can be provided according to changes in load requirements, and production of the methanol reformed hydrogen is controlled by controlling pressure of the buffer tank.

Description

technical field [0001] The invention belongs to the technical field of fuel cell power generation, and in particular relates to a power generation method and power generation device based on a methanol steam reforming system. Background technique [0002] Energy is the basis of economic development, and the traditional way of energy utilization has two major drawbacks. One is that the chemical energy stored in the fuel must first be converted into thermal energy before it can be converted into mechanical energy or electrical energy. Limited by the Carnot cycle and modern materials, the energy conversion efficiency is only 33% to 35%, and more than half of the energy is lost in vain. The second is that the traditional way of energy utilization has caused a lot of waste water, waste gas, waste residue, waste heat and noise pollution to the human living environment today. Over the years, people have been trying to find an energy utilization method that has high energy utilizat...

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Problems solved by technology

[0003] Aiming at the problems in the prior art, the present invention provides a power generation method and power generation device based on a methanol steam reforming system, which effectively reduces interference, solves the problem that the generated hydrogen cannot be supplied to the fuel cell in time and safety, and can be used at any time Provide the required hydrogen to the anode of the fuel cell according to the change of load demand, and control the production amount of methanol reforming hydrogen

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