Cold trap for purifying lead and lead-base alloy

Abstract

The invention discloses a cold trap for purifying lead and lead-base alloy. The cold trap comprises a cylinder and a heat economizer, wherein the cylinder is internally provided with a diversion clapboard and a filter core. The cold trap is characterized in that the lower part of the cylinder is provided with a lead and lead-base alloy inlet and a lead and lead-base alloy outlet, a seal flange is adopted at the upper part of the cylinder, a diversion pore plate is arranged at the bottom of the cylinder and is connected with the cylinder and the diversion clapboard, and the filter core is connected with the diversion clapboard through a fixing bolt. According to the technical scheme, the characteristic that impurities in the lead and lead-base alloy float upwards is fully utilized, a manner of upper feeding and lower discharging is adopted, and the heat economizer is arranged outside the cold trap, so that the heat exchange efficiency is improved; and in addition, no limitation is from the main space of the cold trap so that the size can be enlarged, and the impurities are effectively prevented from blocking a pipeline of the economizer. The upper part of the cylinder is sealed by using the flange, the filter core is fixed on the diversion baffle by using the bolt, and the cold trap is suitable for online purification of the lead and lead-base alloy and can be used to carry out purification experiments at the same time.

Description

technical field [0001] The invention belongs to the technical field of purification equipment for liquid heavy metals and alloys, and specifically designs a cold trap for on-line purification of lead and lead alloys. Background technique [0002] Lead and lead-based alloys have become the first choice for spallation targets and coolants of liquid heavy metal reactors due to their low melting point, high boiling point, excellent neutronic properties, chemical inertness and good thermal conductivity, and extensive research has been carried out worldwide. In liquid heavy metal reactors, an important problem is the impurities produced by the corrosion of lead and lead-based alloys on structural materials, as well as impurities introduced in maintenance, loading and unloading materials, and raw materials. These impurities are easy to block the flow channels of heat exchangers. And loop pipes, reduce heat transfer efficiency, etc. [0003] In order to ensure the safe operation of...

AI Technical Summary

Problems solved by technology

But the purpose of the sodium cold trap disclosed in the above-mentioned documents is to remove impurities in light metal sodium, because impurities in sodium are generally heavier than sodium, and are not suitable for the purification of liquid heavy metals and their alloys

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