An experimental circuit for thermal convection of ultra-high temperature liquid medium

Abstract

The invention discloses an ultra-high temperature liquid medium heat convection experimental loop, which comprises a linear track type box heating furnace and a loop pipeline. The linear track type box heating furnace includes a furnace body, a heater, a linear guide rail and a base frame. The loop pipeline is composed of a melting tank, an air extraction port, a loop main body, an online sampling system, an air-cooled double-layer casing and an exhaust pipe. The optimized design of the linear track type box heating furnace ensures the specific temperature zone distribution required for the experimental loop heat convection; at the same time, the material selection and structure of the loop pipeline can meet the needs of long-term corrosion experiments for reactor candidate materials in ultra-high temperature heat convection media . The device has the characteristics of easy replacement of loop pipes, on-line sampling and installation, and high temperature control accuracy. It can carry out experimental research on the compatibility of materials in flowing media, and is especially suitable for screening and developing high-temperature corrosion-resistant materials for reactors.

Description

technical field [0001] The invention belongs to the field of material corrosion, and in particular relates to an ultra-high temperature liquid medium thermal convection experimental loop. Background technique [0002] Nuclear structural materials in lead-based reactors will be corroded by lead-bismuth alloys under high temperature conditions, resulting in material thinning, and material structure failure may occur, which will affect the normal operation of the entire reactor and bring greater safety hazards to the reactor. When lead-based reactors have accident conditions (loss of cooling, flow blockage), the local temperature inside the reactor may reach ultra-high temperature (about 800°C), which will bring serious tests to the material properties of reactor internal components. For this accident condition At the same time, lead-based reactors have a wide range of uses, one of which can be designed as a high-temperature hydrogen production reactor, which has great advantag...

AI Technical Summary

Problems solved by technology

Since the experimental samples are pre-packaged in the quartz tube, the quartz tube circuit can only be used once, which is expensive, and the installation and removal process of the sample is also cumbersome.

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