Device and process for purifying brine

Abstract

The invention discloses a device and a process for purifying brine, namely, a starting step raw material for producing officinal sodium chloride. The device comprises a dissolving tank and a brine storage tank, wherein a tank partitioning plate is used for partitioning the device into the dissolving tank and the brine storage tank, the interior of the dissolving tank is partitioned into a primary filtration layer, a middle filtration layer and a refined filtration layer from top to bottom by using four baffle plates, a guide hole is formed in the lower part of the tank partitioning plate, and a plurality of small holes are formed in the baffle plates. The process comprises the following steps of: (a), making refined brine, wherein three stages of filtration are included, namely, (i) primary filtration, (ii) middle filtration and (iii) refined filtration; and c, flowing the made refined brine into the brine storage tank through the guide hole for later use. The refined brine prepared by adopting the device and process is high in quality, good in stability, low in cost, large in brine treatment capability, capable of carrying out continuous operation, and more reasonable in process layout.

Description

technical field [0001] The invention belongs to the field of purification of an alkali metal halide solution, and in particular relates to a purification device and a process for producing brine, a raw material for producing medicinal sodium chloride. Background technique [0002] In the initial stage of the production of medicinal sodium chloride, the industrial raw salt is usually dissolved, that is, the initial brine is made, and then refined brine is produced, which is transported to the reaction process for other process operations. In the past, the process of refining the initial brine was to dissolve the industrial raw salt, and then use manual salvage to remove the floating or suspended impurities with a relatively light specific gravity. However, the physical impurities with a large specific gravity often need to stop production and desilt the salt tank. . Usually, the desalter is made of carbon steel, and its volume is restricted by the existing technology, so the...

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Problems solved by technology

Usually, the desalter is made of carbon steel, and its volume is limited by the existing technology, so the frequency of dredging is very high

Moreover, the quality of brine in this case is difficult to guarantee

[0003] At present, in the process of medicinal sodium chloride, the process stage of brine purification is faced with poor quality of refined brine, high cost, small ability to deal with initial brine, poor continuous operation ability, and unreasonable process layout, etc. series of questions

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