Aluminum oxide plant decomposer stirring motor dual-power-supply on-site box power supply method

Abstract

The invention discloses an aluminum oxide plant decomposer stirring motor dual-power-supply on-site box power supply method. The method comprises the following steps that a decomposer stirring motor dual-power-supply on-site box is provided with two power supply inlet wire loops, each power supply is divided into N loops according to the number N of motors needing to be fed, and a dual-power-supply box is provided with 2N loops in total; each loop at least includes the following electronic components: an automatic switch, a contactor, a thermal relay and an isolation knife, and each power supply is connected in parallel in front of the automatic switch; and before a cable in the box is fed out, same name feed-out loops of different power supplies are connected in parallel and then are fedout to the motor of a corresponding name, and the number of the feed-out lines is N in total. All the electrical elements in the box are standard and accord with a national standard. Reliability and flexibility of dual-power-supply on-site box power supply of the decomposer stirring motor are improved.

Description

technical field [0001] The invention relates to a power supply technology for an on-site box with a stirring motor and a double power supply for a decomposition tank in a decomposition and classification workshop of an alumina plant. Background technique [0002] The production process of alumina Bayer process is characterized by strong continuity. Once a failure occurs, running, popping, dripping, and leaking will occur. The production is in a semi-paralyzed state and it will take a long time to resume production. Therefore, it is required that the power failure should not exceed 20 days. minute. The stirring motor of the decomposition tank is an important load in the primary load of the electrical equipment. If the stirring is stopped for more than 15 minutes, the material will settle and it will be difficult to clean up, which will cause huge damage to the decomposition tank and severely damage the production. [0003] Under normal circumstances, each decomposition tank ...

AI Technical Summary

Problems solved by technology

Disadvantages are: 1. The maintenance of the dual power supply mutual switching switch itself may not be able to supply power to the stirring motor of the decomposition tank. 2. The electrical protection components for each motor, such as automatic switches, contactors, and thermal relays, are all single components. If the component is overhauled or fails, it will not be able to supply power to the decomposition tank stirring motor

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