A pump circulation anti-clogging device for high-efficiency pressure filtration of basic magnesium carbonate

Abstract

The invention discloses a pump circulation anti-blocking type device for efficiently pressing and filtering basic magnesium carbonate. A first branch of an inlet pipe is connected with an outlet pipe through a three-way rotary plug and a centrifugal pump, and a second branch of the inlet pipe is connected with the outlet pipe through another centrifugal pump and another three-way rotary plug. By means of the same motor, the two centrifugal pumps are in transmission through a belt. The two three-way rotary plugs are both provided with gears which drive a valve element to rotate, the gears of the two three-way rotary plugs are meshed, one of the gears is driven by a driving gear, and the two three-way rotary plugs can be rotationally switched and vertically communicated through a middle connecting pipe. The inlet pipe is connected to a basic magnesium carbonate buffering tank of an inverted-cone-shaped bottom structure through a valve. An outer circulation anti-blocking loop is arranged between the middle of the buffering tank and the cone bottom. The outlet pipe is connected with a pressing and filtering machine. According to the pump circulation anti-blocking type device, by means of the reasonable and simple pipeline design and the two three-way rotary plugs, convenient and fast series and parallel connection switch is achieved, and pressing and filtering work efficiency is improved. Compared with a conventional series and parallel connection switch device, the pump circulation anti-blocking type device has the advantages of being simple in structure, easy to operate and not prone to making mistakes. The outer circulation anti-blocking loop can effectively prevent blocking and facilitate conveying in materials.

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 ...

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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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