Slope crystallization and solid-liquid separation system

Abstract

The invention relates to the field of environmental protection, energy saving and salt chemical industry, in particular to a slope crystallization and solid-liquid separation system. The slope crystallization and solid-liquid separation system comprises a brine buffer pool, a slope crystallization system and a solid-liquid separation system, the brine buffer pool is arranged below the slope crystallization system, and the brine buffer pool is connected with a brine distribution system arranged at the top of the slope crystallization system. Brine in the brine buffer pool is lifted and distributed to the top of the slope, so that the brine forms a falling film in the vertical flowing process of the slope and is quickly evaporated or frozen and crystallized, and high-purity salt nitrate crystals are obtained through precipitation in the slope bottom solid-liquid separation system and can be automatically conveyed to an external device. According to the invention, a larger interface can be provided for energy and substance exchange between brine and air through the slope crystallization system, so that the brine quickly reaches the environment or slope surface temperature, and the evaporation effect is greatly improved in comparison with that in a traditional crystallization pond or a frozen nitrate pond.

Description

technical field [0001] The invention relates to the fields of environmental protection, energy saving and salt chemical industry, in particular to a slope crystallization and solid-liquid separation system. Background technique [0002] The traditional salt salt industry mostly uses salt ponds or salt ponds for freezing, separation, evaporation, and crystallization. The characteristic is that the brine in the pond has a certain depth, so the energy obtained (or emitted) through the environment is diluted and averaged by a large amount of brine, making The overall temperature change of the brine is small, and the nitrate that can be frozen or evaporated at the average temperature is too thin to be harvested in the same year, which limits the efficiency of freezing nitrate in winter or drying salt in summer. Since it takes years of accumulation to harvest, these open-air brine pools are also diluted by rainwater and polluted by wind and sand, which not only further reduces the...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problems of high power consumption and low economic benefits of the above-mentioned device, and provides a slope crystallization and solid-liquid separation system, including a brine buffer tank, a slope crystallization system, and separation of mother liquor and crystals output from the slope crystallization system The solid-liquid separation system, the brine buffer pool is located below the slope crystallization system and is connected with the brine distribution system at the top of the slope crystallization system through pipelines, and the solid-liquid separation system is located at the bottom of the slope crystallization system

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