Thermoelectric furnace provided with temperature control system

Abstract

The invention discloses a thermoelectric furnace provided with a temperature control system. The thermoelectric furnace comprises a furnace body, a power unit and the temperature control system, wherein the furnace body consists of a combustion chamber, a furnace bottom and a furnace cover; and the power unit comprises a transformer, a rectifier, a short net system and power supply electrodes, the power supply electrodes consist of the negative electrode and the positive electrode, the negative electrode is arranged on the furnace cover, and the positive electrode is arranged at the furnace bottom. According to the thermoelectric furnace, smelted metal is located inside the combustion chamber between the negative electrode and the positive electrode, the metal is smelted by direct-current arcs produced between the negative electrode and the positive electrode, and strong electromagnetic stirring is formed in the molten liquid metal, so that the temperature and the composition of a metal solution are uniform. According to the thermoelectric furnace, a programmable controller is used, so that automatic control of the temperature of the thermoelectric furnace can be realized, the temperature control is accurate, and the operation cost of the whole system is low.

Description

technical field [0001] The invention belongs to the technical field of mechatronics, and relates to a thermoelectric furnace, in particular to a thermoelectric furnace with a temperature control system. Background technique [0002] The thermoelectric furnace is one of the commonly used equipment for heat treatment. The thermoelectric furnace can provide a temperature field ranging from room temperature to 1200 °C. Maintaining a constant temperature in a certain range of the thermoelectric furnace is a problem that must be solved. [0003] A common form of the traditional DC electric arc furnace is the double-electrode DC electric arc furnace, which arranges two electrodes on the furnace cover of the electric arc furnace at the same time, one of which is an anode and the other is a cathode. In practice, the arc generated by this scheme is from the cathode to the molten steel surface and then to the anode, which does not have a good stirring effect on the molten steel. With...

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Problems solved by technology

Therefore, the capacity of the power supply grid is required to be 80 to 100 times the rated capacity of the electric arc furnace; if this requirement cannot be met, expensive dynamic compensation equipment must be equipped

In addition, these electric arc furnaces generate high noise during operation, and the electric arc furnace must be equipped with anti-noise equipment, and the operator must have anti-noise protection measures

[0004] At present, thermoelectric furnaces usually use analog instruments to measure temperature, and control the heating power by controlling the on-off time ratio of the AC contactor. Due to the poor measurement accuracy of the analog instrument itself, and the short life of the AC contactor, the on-off ratio is low. Therefore, the control precision is low

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