Suction filtration device and filtering method thereof

Abstract

The invention relates to a suction filtration device and a filtering method thereof. An ordinary reaction kettle is communicated with a negative pressure-resistant reaction kettle or a transfer tank through a liquid conveying pipe and a connecting pipe; the negative pressure-resistant reaction kettle or the transfer tank is communicated with a vacuum set through an air suction pipe; an inlet of a suction filter movably installed under the liquid level of the ordinary reaction kettle is connected with an outlet of the connecting pipe; the suction filter comprises a porous filter screen holder and filter cloth enwrapping the outer layer of the filter screen holder; and a high-concentration ammonium molybdate solution is cooled and crystallized in the negative pressure-resistant reaction kettle and filtered and dried to obtain an ammonium heptamolybdate product, or pretreated mother liquor in the upper layer of the ordinary reaction kettle is filtered by the suction filter and is sucked into the transfer tank through the connecting pipe and the liquid conveying pipe to obtain pure high-concentration ammonium molybdate liquid. Through the suction filtration device and the filtering method thereof which are used for filtering a solution and separating a solid from liquid, the problem of filtering difficulty caused by crystal separation from the solution due to influence of external factors on the solution or change of external environment in a filtering process can be easily overcome.

Description

technical field [0001] The invention relates to a suction filtration device and a filtration method for filtering solution. The suction filter of the suction filter is completely submerged in the medium to be filtered. Background technique [0002] According to the difference in the properties of the solution system that requires solid-liquid separation, the filtration method is usually one of plate and frame filter press, vacuum suction filter, centrifugal filter, and resin layer filter. The common feature of these filtration methods is that the medium to be filtered is transferred from a container to the filter device in a certain way, the filtered solution is stored in another container, and the solid phase is accumulated in the solid-liquid separation equipment. Then it is cleared and circulated in this way to achieve the effect of solid-liquid separation. [0003] When the solid-liquid mixture to be separated is transferred from one container to another, due to the dif...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a suction filter device and a filtering method for filtering a solution and separating solid and liquid, which is beneficial to solve the influence of external factors on the solution itself in the filtering process, and is beneficial to solve the problem of Due to changes in the external environment, crystals are precipitated from the solution, resulting in difficulty in filtration

Images