Microwave heating system used for platinum channel in glass substrate manufacturing process

Abstract

The invention discloses a microwave heating system used for a platinum channel in a glass substrate manufacturing process. The system comprises a crucible, a microwave heating cavity and a fixing supporting steel sleeve which sequentially sleeve the platinum channel from the inside to the outside, and the crucible, the microwave heating cavity and the fixing supporting steel sleeve are arranged along the axial direction of the platinum channel; a filling layer is arranged between the crucible and the platinum channel, and a thermal-insulation layer is arranged between the fixing supporting steel sleeve and the microwave heating cavity; three microwave generators are arranged on the outer circumference of the microwave heating cavity along the radial direction at intervals, every three microwave generators forms one microwave heating group, and two or more microwave heating groups are arranged on the outer circumference of the microwave heating cavity along the axial direction; and thesystem also comprises a PLC and several microwave controllers, the microwave controllers are in one-to-one corresponding connection with microwave generators, and the output interfaces of the PLC areseparately connected with the microwave controllers. The heating system provided by the invention can uniformly heat the platinum channel, has a fast heating speed and low energy consumption, and is convenient to arrange and easy to adjust.

Description

technical field [0001] The invention relates to the technical field of glass manufacturing, in particular to a microwave heating system for platinum channels in the manufacturing process of glass substrates. Background technique [0002] In the manufacturing process of TFT-LCD, LTPS and other electronic display glass substrates, after the batch material is melted at high temperature in the kiln, it enters the high-temperature and corrosion-resistant platinum channel to complete clarification, homogenization and other processes, forming glass liquid with very few defects For forming drawn glass substrates. [0003] During this process, the platinum channel needs to be heated to a certain temperature to meet the process requirements. The most common method in production is direct drainage to heat the platinum channel. The flange structure is used to direct the current to the platinum channel body. The current flows through the platinum channel with a certain internal resistan...

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Problems solved by technology

[0004] The problems found in the production of this heating method are as follows: 1. The heating flange structure needs precise dimensions to ensure the average distribution of current in the current sharing layer; 2. The heating current is concentrated at the connection between the flange structure and the platinum channel, resulting in The local current density is high, which is easy to ablate the platinum channel; 3. The heating circuit is blown out, and it cannot be repaired or replaced; 4. After a certain circuit is blown out, heat compensation can only be performed by increasing the current / power of the front and rear circuits , limit the space for process adjustment, and increase the probability of blown out of the front and rear circuits at the same time; 5. The heating speed is slow and the energy consumption is high

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