Threaded sleeve type microchannel heat regenerator for supercritically hydro-thermally synthesizing nanopowder

Abstract

The invention relates to a threaded sleeve type microchannel heat regenerator for supercritically hydro-thermally synthesizing nanopowder. The threaded sleeve type microchannel heat regenerator for supercritically hydro-thermally synthesizing nanopowder comprises an outer sleeve, a threaded sleeve I, a threaded sleeve II, an insulating sleeve, a threaded sleeve III and an inner matrix which are coaxially arranged from outside to inside in a telescoping manner, successively. Spiral runners I, II, III and IV are successively formed between the outer sleeve and an outer thread of the threaded sleeve I, between the an inner thread of the threaded sleeve I and an outer thread of the threaded sleeve II, between an outer thread of the threaded sleeve III and the inner wall of the insulating sleeve and between an inner thread of the threaded sleeve III and an outer thread of the inner matrix. The spiral runners I and III communicate at the bottom, the spiral runners II and IV communicate at the bottom, and the top ends of the spiral runners I, II, III and IV are separately connected to a cold fluid inlet, a hot fluid outlet, a cold fluid outlet and a hot fluid inlet. The threaded sleeve type microchannel heat regenerator for supercritically hydro-thermally synthesizing nanopowder can achieve quick cooling of a hot fluid after reaction, recycling of waste heat of a system and quick preheating and warming of a reaction precursor fluid article, can guarantee the product quality and can improve the circulating efficiency, the heat economy and the stability of the system.

Description

technical field [0001] The invention relates to a regenerator used in the technical fields of energy, chemical industry, environmental protection, synthetic materials, etc., and in particular to a threaded sleeve type microchannel regenerator used for supercritical hydrothermal synthesis of nanopowder. Background technique [0002] Nano-metal and metal oxide powders are important industrial raw materials. Compared with ordinary powders, nano-metal powders have superior properties, such as large specific surface area, interface effect, quantum effect and quantum tunnel effect, etc., endowing them with Unique properties and specific electrical, thermal, magnetic, optical and mechanical properties are widely used in various fields, and all of them have caused revolutionary changes in the industry. For example, nano-copper oxide can be used as a sensitive sensor coating film, which greatly improves the selectivity and sensitivity of the sensor, and can be used as an anode materi...

AI Technical Summary

Problems solved by technology

However, the traditional high-temperature and high-pressure heat exchanger structures such as sleeve-and-tube heat exchangers and shell-and-tube heat exchangers have certain technical problems, including: (1) low utilization rate of heat exchange area, large heat loss, and low heat exchange efficiency. The cycle efficiency is poor, which makes the system unable to achieve rapid heating and efficient mixing; (2) The crystal stays in the tube for a long time, and the particles are agglomerated during the nucleation and crystallization process, and the quality of the produced product is poor; (3) The cooling time of the thermal fluid is long , the temperature of the outlet product cannot drop rapidly, and agglomeration is prone to occur, causing problems such as blockage and deposition in the regenerator tube, affecting system stability

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