Thermocouple multi-point temperature measurement device and simulated pressure reactor comprising same

Abstract

The invention discloses a thermocouple multi-point temperature measurement device comprising at least two thermocouple wires and a casing. The casing has a first end and a second end which face each other in the axial direction of the casing. The side wall of the casing is provided with at least two lead-out holes, and the at least two lead-out holes are spaced apart in the axial direction of the casing. One end of each thermocouple wire passes through the casing and is led out of the outer wall of the casing through the corresponding lead-out hole, the led-out thermocouple wire section is used as a temperature measurement section and extends in a direction roughly perpendicular to the axial direction of the casing, and the diameter of the thermocouple wires is slightly smaller than the inner diameter of the lead-out holes. The invention further relates to a simulated pressure reactor comprising a simulated pressure reactor vessel, multiple electric heating rods, and at least one thermocouple multi-point temperature measurement device, wherein the axial direction of the casing of each thermocouple multi-point temperature measurement device is parallel to the axial direction of the vessel, and the casing of each thermocouple multi-point temperature measurement device is disposed in the gap between adjacent electric heating rods.

Description

technical field [0001] The invention relates to thermal measurement, in particular to a thermocouple multi-point temperature measuring device and core temperature field measurement of a simulated pressure reactor with the same. Background technique [0002] The measurement of the core temperature field is usually achieved by arranging multiple multi-point thermocouple measurement devices in the core to achieve three-dimensional temperature field measurement. At present, the special multi-point thermocouple temperature measurement products at home and abroad are widely used in the electric power or petrochemical industry to monitor the temperature stratification of the medium in the large space container, such as the special multi-point thermocouple used in the chemical catalyst reactor. This kind of multi-point thermocouple usually uses a flange-mounted structure, usually installed in a non-pressure vessel or a low-pressure vessel. The armored thermocouple used is encapsulat...

AI Technical Summary

Problems solved by technology

This kind of multi-point thermocouple usually uses a flange-mounted structure, usually installed in a non-pressure vessel or a low-pressure vessel. The armored thermocouple used is encapsulated in a stainless steel protective sleeve, which cannot be in direct contact with the medium, and the temperature response time is longer. There are thermal conductivity errors in the measurement results

[0003] The reactor pressure vessel test device used for the test has a special simulated internal structure of the reactor core and a very small installation space after scaled down. The multi-point thermocouple used in conventional industries is not suitable.

Specifically, electric heating rods simulating fuel rods are arranged in the reactor pressure vessel test device, and the reactor core is designed to simulate the flow area of ​​the prototype reactor in proportion. The reactor pressure vessel is also designed with a multi-layer heating rod support grid, resulting in a temperature field measurement device The installation space is very limited, and the installation of multi-point thermocouples in a small space requires a special structural design of the temperature measuring device

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