A method and device for treating crosslinking agent for high-voltage ultra-high-voltage ultra-clean insulating materials

Abstract

Provided are a method and device for processing DCP of a high to ultrahigh voltage and ultra-clean insulating material. The method includes the following steps that (1) liquid is heated to melt, (2) deal-load filtering and storage are conducted, and (3) metering and gas shield injection are conducted jointly. The invention further discloses the device included in the method. The device comprises a melting tank, a filtering device, a storage tank, a metering device and a gas injection device, wherein the lower end of the melting tank is in threaded connection with the filtering device in a sealed mode; the storage tank is in sealed connection with the lower end of the filtering device; the metering device and the gas injection device are tightly connected into a whole; and the outer layers of the filtering device, the melting tank and the storage tank are provided with constant-temperature hoods with the temperature controlled by a temperature controller. The method and device can guarantee the dispersion uniformity and crosslinking stability of crosslinked polyethylene, improve the high electric field resistance of crosslinked polyethylene, meet the use demand for long-term operation of ultrahigh voltage cables, make DCP permeate into polyethylene particles by over 80%, and finally obtain crosslinked polyethylene ultra-clean materials meeting the condition to manufacture high to ultrahigh voltage cables.

Description

technical field [0001] The invention relates to a method and device for melting and filtering cross-linking agent (DCP) and gas injection and atomization, in particular to a method and device for processing cross-linking agent of high-voltage, ultra-high-voltage and ultra-clean insulating materials. Background technique [0002] Cross-linking agent (DCP) is an indispensable additive in cross-linked cable insulation materials. As the demand for cross-linked cables increases and the voltage level increases, the amount of cross-linked polyethylene is increasing. At present, in the process of mixing polyethylene for medium and low pressure cross-linked polyethylene products in my country, cross-linking agent powder is directly added, and heating and melting are carried out during the mixing process, which leads to uneven distribution of cross-linking agent melting. The temperature distribution is uneven, resulting in oxidation or even decomposition of the cross-linking agent, whi...

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Problems solved by technology

At present, during the mixing process of polyethylene in my country's medium and low pressure cross-linked polyethylene products, cross-linking agent powder is directly added, and heating and melting are carried out during the mixing process, which leads to uneven distribution of cross-linking agent melting, and due to heating, fusion and mixing. The temperature distribution is uneven, resulting in oxidation or even decomposition of the cross-linking agent, which eventually leads to the scrapping of the cross-linked polyethylene material. Low-pressure cross-linked polyethylene materials, resulting in the situation that high-pressure ultra-high-pressure cross-linked polyethylene still needs to be imported

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