Optimized minisize hydrogen source heat exchange system
A micro-channel heat exchanger and hydrogen source technology, applied in the fields of hydrogen, inorganic chemistry, chemical instruments and methods, etc., can solve the problems of loss of action, slow heat balance of the whole system, slow start of the micro hydrogen source system, etc., and achieve accelerated start-up. process, the effect of optimizing the heat exchange network
Active Publication Date: 2013-07-10
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology
[0007] This inconsistency between start-up and steady-state processes leads to the slow start-up and slow heat balance of the whole system in the operation of the micro-hydrogen source system. As a result, the function of the energy "regulating valve" of the combustion / vaporizer is lost, because the heated reforming reaction raw material is cooled by the CO selective oxidation subsystem in a cold state at room temperature
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[0016] The present invention will be further described below. The present invention can be connected with reference to the content of the specific implementation in the patent application number 200710159028.X. The difference is that the CO selective oxidation reaction / heat exchange module 2 and the catalytic combustion reaction / heat exchange There is a three-way valve on the pipeline between modules 3, through which the flow direction of methanol autothermal reforming raw material is controlled and switched, that is, it enters the microchannel heat exchanger in module 1 or module 2, the purpose is to accelerate the start-up of the system, Reduce startup time and expose a concrete implementation to solve this problem.
[0017] The present invention can accelerate the optimized heat exchange network for hydrogen source system start-up, such as figure 1 shown. The figure includes a methanol autothermal reforming / heat exchange module 1, a CO selective oxidation / heat exchange mod...
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An optimized minisize hydrogen source heat exchange system. During a stable state of the system, raw materials of a methanol autothermal reforming reaction are treated with heat exchange through a catalysis combustion reaction / heat exchange module, a CO selective oxidation reaction / heat exchange module and a methanol autothermal reforming reaction / heat exchange module; then the raw materials enter into a reforming reactor for reaction, so as to obtain high temperature hydrogen-rich reforming gas. During starting of the system, the raw materials of the reforming reaction are treated withheat exchange through the catalysis combustion reaction / heat exchange module, then directly enter methanol autothermal reforming reaction / heat exchange module for heat exchange, and enter into the reforming reactor to complete oxidation reforming reaction; reforming gas evacuates through a triple valve; and the CO selective oxidation reaction / heat exchange module is in a normal temperature cold state. The invention optimizes a heat exchange network and obviously accelerates a starting process of the minisize hydrogen source system.
Description
technical field [0001] The invention relates to a microchannel heat exchange system in a miniaturized methanol autothermal reforming hydrogen production system, in particular to an optimized heat exchange network that can realize rapid start-up of a miniature hydrogen source system. Background technique [0002] Due to its high energy conversion efficiency and environmental friendliness, fuel cells are the best candidate power sources for future electric vehicles and distributed energy supply systems. Fuel cell technology must have a suitable fuel. Proton exchange membrane fuel cells (PEMFC) use hydrogen as fuel. On-site hydrogen production from methanol is the most realistic hydrogen source for PEMFC in the near future. In the 1990s, PEMFC technology achieved rapid development and gradually entered the stage of commercialization. It is one of the bottleneck technologies for the practical application of fuel cells. Compared with the mature large-scale industrial hydrogen pr...
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IPC IPC(8): C01B3/34
Inventor 陈光文焦凤军李淑莲李恒强门勇
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI