System for improving operation condition of dissolution diaphragm pump in Bayer process aluminum oxide production

Abstract

The invention relates to the field of Bayer process aluminum oxide production, in particular to a system for improving the operation condition of a dissolution diaphragm pump in Bayer process aluminumoxide production. A low liquid level line and a high liquid level line are added to a diaphragm pump inlet pulse buffer tank, and a pressure increasing valve and a pressure reducing valve are installed at the top of the pulse buffer tank. Meanwhile, the temperature of the pulse buffer tank is measured by a thermodetector to judge the liquid level. Control is carried out according to the range higher than the low liquid level line and lower than the high liquid level line of the pulse buffer tank, compressed air is introduced above the liquid level to achieve control, the pressure increasing valve and the pressure reducing valve are adjusted and matched with a pressure gauge, and stable control over the inlet pressure of the diaphragm pump can be achieved. The height of the liquid level can be judged by measuring the temperature of the pulse buffer tank through a handheld thermodetector, and therefore optimal control over operation of the diaphragm pump is achieved. The pressure of thediaphragm pump and even a dissolution unit is stabilized, the maintenance period of the diaphragm pump is prolonged, and the operation efficiency of the diaphragm pump is improved.

Description

technical field [0001] The invention relates to the field of alumina production by the Bayer process, and more specifically relates to a system for improving the operating condition of a dissolution diaphragm pump in the production of alumina by the Bayer process. Background technique [0002] In the production of alumina, the dissolution diaphragm pump is likened to the "heart", which undertakes the task of stably feeding the dissolution slurry system, so the stability of its operation is very important. Usually, in order to stabilize the pressure fluctuation of the dissolution system, a pressure stabilizing pump is usually added before the dissolution diaphragm pump, or a pulse buffer tank is added at the inlet of the dissolution diaphragm pump to stabilize the pressure. [0003] The deficiencies in the prior art include: 1. Using a stabilizing pump to stabilize the inlet pressure of the diaphragm pump has the disadvantages of easy damage to spare parts and increased equip...

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Problems solved by technology

[0003] The deficiencies in the prior art include: 1. Using a stabilizing pump to stabilize the inlet pressure of the diaphragm pump has the disadvantages of easy damage to spare parts and increased equipment points; The pressur

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