A metal hydride reactor filled with composite briquettes with different expanded graphite contents
A technology of expanded graphite and hydride, applied in chemical instruments and methods, chemical/physical processes, chemical/physical/physicochemical processes, etc., can solve problems such as inhomogeneity
Active Publication Date: 2021-06-08
SICHUAN UNIV
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Problems solved by technology
[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art, provide a metal hydride reactor filled with composite briquettes with different expanded graphite contents, and solve the inhomogeneity of heat exchange between the reaction bed and the heat exchange fluid along the flow direction of the heat exchange fluid problem, increase the hydrogen absorption and desorption reaction rate of the reactor
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Embodiment
[0026] The metal hydride reactors of the present embodiment filled with composite briquettes with different expanded graphite contents, such as Picture 1-1 , Figure 1-2 , figure 2 As shown, it is a vertical structure, which consists of a reactor shell 1, a reaction bed unit that reacts with hydrogen in the reactor shell, and a hydrogen inlet and outlet pipe 4 arranged on the top of the shell. The unit is composed of a cylindrical composite compact 3 formed by mixing and pressing 50 layers of magnesium hydride powder and expanded graphite from bottom to top, and a heat exchange tube 5 passing through the center hole of the composite compact. The composite compact is from bottom to top. A support plate 2 is arranged every 5 layers on the top, and the mass content of expanded graphite in each layer of the composite briquette in the 5-layer composite briquetting section between the two support plates is equal. The outer diameter of all the composite briquettes is 100 mm, and t...
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Abstract
The invention provides a metal hydride reactor filled with composite briquettes with different expanded graphite contents, which comprises a reactor shell, at least one reaction bed unit which reacts with hydrogen and is arranged in the shell The hydrogen inlet and outlet pipes on the top, the reaction bed unit is composed of a composite compact made of metal hydrides and expanded graphite mixed and pressed together in multiple layers and a heat exchange tube vertically passing through each layer of composite compacts, different layers of composite compacts The mass content of expanded graphite in the briquette increases gradually along the flow direction of the heat exchange fluid in the heat exchange tube, and the heat exchange fluid in the heat exchange tube is used to cool or heat the metal hydride in the composite briquette. The invention overcomes the problem of non-uniform heat exchange between the reaction bed unit and the heat exchange fluid along the flow direction of the heat exchange fluid existing in the metal hydride reactor filled with composite briquettes with uniform expanded graphite content in the prior art, and improves the efficiency of the reactor. The hydrogen absorption and desorption reaction rate.
Description
technical field [0001] The invention belongs to the technical field of fixed bed reactors, in particular to a metal hydride reactor filled with composite briquettes with different expanded graphite contents. Background technique [0002] Under a certain temperature and pressure, some metals or alloys can decompose hydrogen molecules into hydrogen atoms, and then undergo a chemical reaction to form metal hydrides. This process has good reversibility and is accompanied by significant thermal effects. Therefore, metal hydrides can be used as heat storage materials in the field of heat storage. Among many metal hydrides, magnesium-based metal hydrides have higher working temperature and higher reaction enthalpy, so they have a significant advantage of high heat storage density, and are considered by scholars at home and abroad to be a potential high-temperature heat storage material. In addition, metal hydrides also have great application potential in heat utilization fields su...
Claims
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IPC IPC(8): B01J19/32B01J19/00F28D20/00
CPCB01J19/0053B01J19/325F28D20/0056Y02E60/14Y02E70/30
Inventor 鲍泽威牟晓锋朱泽志黄卫星
Owner SICHUAN UNIV