Moving bed type thermal method distillation crystallizer

Abstract

The invention discloses a moving bed type thermal method distillation crystallizer. The crystallizer comprises a box body, an intake pipe, a water injection pipe, an exhaust pipe and a condenser; the inner part of the box body is provided with a crystallizing chamber, wherein the top of the crystallizing chamber is connected with a feed port arranged on the top part of the box body, the bottom part of the crystallizing chamber is connected with a discharge port arranged on the bottom part of the box body, and a cavity of the crystallizing chamber is full of light filler balls having adsorbing performance; the hypertonic saline injected from the water injection pipe forms a moving bed by using the filler balls as carriers and with the help of the gravity function of the filler balls, and is then subjected to the heat exchanging with the hot air or exhaust fume in the crystallizing chamber in order to separate the saline adhered on the surfaces of the filler balls so as to obtain salt and distilled water. The moving bed type thermal method distillation crystallizer provided by the invention does not scale in the distillation process and is capable of processing all hypertonic saline, so as to achieve zero discharge; with the adoption of waste fume as a heat source, the energy consumption and the running cost are low.

Description

technical field [0001] The invention relates to the field of chemical equipment, in particular to a moving bed thermal distillation crystallizer. Background technique [0002] During the "Twelfth Five-Year Plan" period, my country will take water pollution control as one of the focuses of environmental protection work. In water pollution control work, the treatment of high-salt wastewater (including metallurgical industry circulating wastewater, power plant boiler wastewater, power plant desulfurization wastewater, chemical wastewater, etc.) has become a difficult problem in water treatment. At present, the most commonly used desalination method is the traditional distillation desalination technology, which is basically developed on the basis of seawater desalination and desalination technology. Distillation is the process of heating salt water to make it boil and evaporate, and then condensing the steam into fresh water. Distillation is the earliest desalination method, w...

AI Technical Summary

Problems solved by technology

However, the traditional thermal treatment of high-salt wastewater technology mostly adopts multi-effect evaporation technology, which generally has the disadvantages of huge initial investment and high operating costs, and it is difficult for enterprises to put it into production and use in a stable and sustainable manner economically. The embarrassing situation of investing but not using, building but not using"

From the perspective of equipment, the existing concentration equipment has the following problems: (1) the corrosion of the material of the concentration equipment under the condition of high saline water; (2) the scaling problem of the evaporation surface during the concentration process; (3) the low Solubility salts, such as calcium sulfate and silica saturation limit the water conversion rate of the evaporation system; (4) investment and operating costs are high

[0004] It can be seen that from the perspective of the existing technical application of thermal treatment of high-salt wastewater, the biggest technical difficulty lies in how to realize the continuous and smooth discharge of residues after evaporation in the process without affecting the continuous and stable operation of the process system. , and will not cause new secondary pollution problems

That is to say, there are serious evaporator structure clogging problems and energy consumption problems in the thermal treatment of high-salt wastewater.

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