Process for continuously producing solid salt from salt solution

Abstract

The invention provides a process for continuously producing solid salt from a salt solution. The process comprises the following steps that: firstly, the pressurized salt solution is put in a dispersing room, which makes the salt solution pressurized when the salt solution passes the dispersing room; under the pressure, the salt solution is dispersed into micro water beads of which the volumes areless than or equal to 15 cubic millimeters and then enter a salifying room; secondly, the pressurized air is fed in a heater, heated and then enters the salifying room from at least two directions tofully mix with the dispersed salt solution; thirdly, the mixture obtained in the salifying room is heated to vaporize water, and the mixture is crystallized to obtain the solid salt; fourthly, the crystallized solid salt enters a salt collector for collection; and fifthly, the waste heat in the third step can be recycled, and simultaneously the vaporized water is condensed for recycling; therefore, the process has the characteristics of continuousness, scale, low energy consumption, high efficiency and no environmental pollution.

Description

technical field [0001] The invention relates to a process for producing solid salt, in particular to a process for continuously producing solid salt using salt solution. Background technique [0002] The use of salt solution to produce solid salt has a long history to meet people's life and production needs. The most traditional brine salt production is solar salt production, which is characterized by a large area, low evaporation efficiency, and is affected by natural conditions. , the effective working time is short and the production capacity is low. In modern times, vacuum evaporation and other methods have been invented, but the flash area is limited and the flash temperature loss is large, so the energy consumption is large, the crystallization efficiency is low, and continuous production cannot be realized. Continuous production of evaporation, crystallization, and solid-liquid separation cannot be realized. complicated. In the flash process, the evaporation and cry...

AI Technical Summary

Problems solved by technology

[0002] The use of salt solution to produce solid salt has a long history to meet people's life and production needs. The most traditional brine salt production is solar salt production, which is characterized by a large area, low evaporation efficiency, and is affected by natural conditions. , the effective working time is short, and the production capacity is low

In modern times, vacuum evaporation and other methods have been invented, but the flash area is limited and the flash temperature loss is large, so the energy consumption is large, the crystallization efficiency is low, and continuous production cannot be realized. Continuous production of evaporation, crystallization, and solid-liquid separation cannot be realized. complicated

In the flash process, the evaporation and crystallization process are carried out simultaneously, and it is difficult to control and optimize the crystallization and evaporation separately. There is an obvious short-circuit heat cycle in the process, and the supersaturation and nucleation rate of the evaporation liquid level and the main body of the solution are very different, resulting in There are large fluctuations in the crystal size distribution