Pump cycle blockage prevention device for efficiently pressing and filtering basic magnesium carbonate

Abstract

The invention discloses a pump cycle blockage prevention device for efficiently pressing and filtering basic magnesium carbonate. An inlet pipe branch I is connected to an outlet pipe through a three-way cock and a centrifugal pump, wherein a branch II is connected to the outlet pipe through the other centrifugal pump and the other three-way cock; a gear is arranged on each of the two three-way cocks and is used for driving a valve element to rotate; a driving gear is arranged between the gears of the two three-way cocks and is used for simultaneously driving the two three-way cocks to rotate and switch; the two three-way cocks are communicated with each other at upper and lower parts through a middle connection pipe; an inlet pipe is connected to a basic magnesium carbonate buffering tank of an inverted cone bottom structure through a valve; an external cycle blockage prevention loop is arranged between the middle part and the cone bottom of the buffering tank; the outlet pipe is connected to a pressure filter. Through reasonable and simple pipeline design and the two three-way cocks, series connection and parallel connection are convenient to switch; the pressing and filtering efficiency is improved; compared with a conventional series-parallel connection switching device, the device has the characteristics of simple structure, convenience and low possibility of error in operation and high practicability; the external cycle blockage prevention loop can be used for effectively preventing blockage; and the material input is facilitated.

Description

technical field [0001] The invention relates to a pump circulation anti-clogging type device for high-efficiency pressure filtration of basic magnesium carbonate. Background technique [0002] Basic magnesium carbonate is one of the most important compounds in the magnesium industry, and is widely used as an additive in toothpaste, paint, cosmetics, plastics, rubber, etc. Usually, basic magnesium carbonate can be obtained by pyrolysis, that is, pyrolysis of magnesium bicarbonate, and its main reaction mechanism is 2Mg(HCO3)2=Mg2(OH)2CO3+3CO2+H2O. [0003] In modern industry, basic magnesium carbonate is mainly produced by pyrolyzing magnesium bicarbonate solution, that is, pyrolyzing heavy magnesium water. After the pyrolysis of heavy magnesium water is completed, pressure filtration is required to obtain the product. Press filtration of basic magnesium carbonate is generally plate Frame filter press, and centrifugal pump is used as the filter pump. The process of pressing ...

AI Technical Summary

Problems solved by technology

[0004] However, in the filter press operation, the existing centrifugal pumps cannot automatically adapt to such a process to achieve an ideal working state of high efficiency and high quality

Generally, when a centrifugal pump performs filter press operation, the head of the filter press is low in the early stage, but the flow rate is large, so that the motor is in an overload state, and it is easy to burn the motor; The flow rate decreases rapidly. At this time, although the motor works in a light-load and low-power state, the filter press efficiency is very low; although the filter press pump has the maximum head output state, due to the small flow rate of the filter press fluid, the filter press cannot be fully utilized. Work performance and improve work efficiency

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