Micro-via type chemical heat pump reactor

Abstract

A micro-channel typed chemical heat pump reactor contains a casing. A heat exchange fluid outlet is arranged on the upper part of the external wall of the casing. The reactor contains an inner cylinder, an outer cylinder, and an interlayer, which is used for accommodating heat exchange fluid, is formed between the inner and outer cylinders. A filter screen and a flange are arranged on the bottom of the casing. Hydride powder is filled in the casing. A totally enclose typed ring micro-channel is arranged inside the reaction bed. High efficiency heat exchange fluid is poured into the micro-channel. The gas enters into the reactor through the filter screen, and reacts with the hydride powder. The reaction heat is brought to the inner cylinder wall of the reactor by fluid circulation of reaction inside the micro-channel, and is taken away by exchange heat fluid. The target of quick speed and high efficiency of heat exchanging is achieved. The invention is characterized by compact device structure, large reagents filling capacity, high heat transfer efficiency, high operation elasticity, and convenient regulation and control and so on.

Description

technical field [0001] The invention relates to a gas-solid phase reactor for chemical heat pump, heat exchange and refrigeration, belongs to a chemical heat pump reactor for gas-solid reactions such as hydrogenation / dehydrogenation, and particularly relates to a microchannel type chemical heat pump reactor. Background technique [0002] The gas-solid reactors currently used in chemical heat pumps mainly include the following categories: [0003] Tubular Reactor - There are two types of filling inside the tube and loading outside the tube. The gas-solid reactor outside the tube is equipped with solid reactants on the shell side of the heat exchange tube. The filling capacity is large, but the heat exchange efficiency is extremely low and the large-sized outer filter tube cannot be processed at this stage, and the large-scale application of chemical heat pumps cannot be realized at present. (Z.Dehouche, W.deJong, E.Willers, et al.Modeling and simulation of heating / air condit...

AI Technical Summary

Problems solved by technology

The gas-solid reactor outside the tube is equipped with solid reactants on the shell side of the heat exchange tube. The filling capacity is large, but the heat exchange efficiency is extremely low and the large-sized outer filter tube cannot be processed at this stage, and the large-scale application of chemical heat pumps cannot be realized at present. (Z.Dehouche, W.deJong, E.Willers, et al.Modeling and simulation of heating / air conditioningsystems using the multi-hydride thermal wave concept[J].Applied ThermalEngineering, 1998, 18:457-480.); In the type gas-solid reactor, the solid reactant is packed in the heat exchange tube, and the heat exchange effect is better than that of the outer tube, but the filter tube is expensive and the reactant loading is less, which makes the equipment cost higher (J.G.Park, K.J.Jang, P.S.Lee, et al.The operating characteristics of the compressor-driven metal hydride heat pump system[J].Int.J HydrogenEnergy, 2001, 26:701-706.)

[0004] Disk Reactor—Thin metal disks are used to fill solid reactants, and the heat exchange effect is very good, but too little reactant loading makes the equipment cost high, and the reaction system has low pressure, complicated disassembly and assembly, and is not suitable for chemical heat pumps Industrial regulation (G. Anevi, L. Jansson, D. Lewis. Dynamics of hydrideheat pumps [J]. Journal of the Less-Common Metals, 1984, 104: 341-348.)

[0005] Autoclave reactor - high pressure resistance, large filling capacity, low equipment cost, but the heat and mass transfer rate is very slow, the output power is low, and the overall economy for chemical heat pumps is very poor (X.L.Wang, S.Suda.Reaction kinetics of hydrogen-metal hydride systems[J]. International Journal of Hydrogen Energy, 1990, Vol.15, No.8: 569-577.)

[0006] Ring-disk reactor—has the advantages of compact equipment structure, large reactant loading capacity, large operating flexibility, and convenient control, but the structure is relatively complicated, there are many parts, and the hydride powder and structural parts are not easy to replace. Applications need to be further explored (Yuqi Wang, Fusheng Yang, Zaoxiao Zhang, Xiao Feng. Improved design of metal hydride reactor for heatpump applications. 5th International Symposium on Multiphase Flow, HeatMass Transfer and Energy Conversion Xi'an, China, 3-6July, 2005 .)

[0007] Other types of gas-solidification chemical heat pump reactors, such as stacked reactors, are compact in structure and easy to operate, but have obvious defects such as uneven reaction and heat transfer, and cannot be applied industrially at this stage (D.Shaltiel, N.Kaplan, A. Granyevsky, et al. Hightemperature hydride tank using MmMg12compounds[J]. Journal of the Less-Common Metals, 1984, 104: 319-327.)

[0008] To sum up, the current reactors cannot take into account the system performance requirements of reaction and heat exchange for gas-solid reactors for chemical heat pumps, cannot achieve efficient and rapid heat and mass transfer, and cannot improve reaction efficiency

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