Circulating rare earth wastewater comprehensive treatment system

A comprehensive treatment and circulation technology, applied in the field of circulation rare earth wastewater comprehensive treatment system, can solve the problems of slow evaporation speed, small area, vacuum pump damage, etc., and achieve the effect of increasing evaporation surface area, improving distillation efficiency and avoiding evaporation

Active Publication Date: 2022-02-11
NANCHANG INST OF TECH
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Rare earth is a precious and non-renewable important strategic resource in our country. The current rare earth industrial production process will produce various waste water. Among them, the spray purification of rare earth concentrate roasting tail gas will produce a large amount of acid waste water. The content of fluorine in this kind of waste water If the content is too high, if it cannot be effectively treated, it will cause serious pollution to the environment. At present, most of the treatment methods for acidic wastewater are the process of recovery by vacuum distillation to separate the sulfuric acid and hydrofluoric acid in the acidic wastewater. However, at present The hydrofluoric acid extracted in the vacuum distillation process will easily evaporate again, which will not only lead to a loss of recovery, but also easily cause damage to the vacuum pump; in addition, the evaporation surface of the existing vacuum distillation is only the liquid surface, and the area is small Small, slow evaporation, and prone to bumping

Method used

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  • Circulating rare earth wastewater comprehensive treatment system
  • Circulating rare earth wastewater comprehensive treatment system
  • Circulating rare earth wastewater comprehensive treatment system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1, the present invention provides a kind of technical scheme: a kind of circulating type rare earth wastewater comprehensive treatment system, comprises distillation kettle 1 and collection tank 2, and pressure relief valve is installed on distillation kettle 1 and collection tank 2 and is used for detecting distillation Pressure gauges for the internal pressure of the still 1 and the collection tank 2, and a pH detection module 31 for detecting acidic wastewater is also installed inside the still 1, and the pressure relief valve can be opened when the distillation is completed, so that the inside of the still 1 and the collection tank 2 The air pressure in the still can be restored to normal, so that the distillation raffinate and condensate can be discharged better. The pH detection module 31 can detect the pH value of the acidic wastewater inside the still 1 in real time, so that the distillation process can be accurately judged, and the still still 1 can be...

Embodiment 2

[0044] Embodiment 2, the evaporation surface of the existing still 1 is the area of ​​the liquid surface, so its evaporation rate is restricted by it, and there is a certain volume of barrier between the evaporation surface and the electric heating wire 5, so it is also easy to occur Therefore, in order to comprehensively utilize the inner surface of the still 1, the structure in the still 1 is changed on the basis of Embodiment 1.

[0045] Specifically, a lifting cylinder 36 that penetrates up and down is installed in the still 1, and the lifting cylinder 36 is installed and connected with the still 1 by surrounding accessories. The turbine 37 is connected to the rotating shaft 6, and the lifting cylinder 36 sets Connected to the outside of the turbine 37, the turbine 37 can play the role of agitating paddles, and can also cooperate with the lifting cylinder 36 to remove the upper end of the lifting cylinder 36 from the material and liquid lift. The upper end of the rotating s...

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Abstract

The invention discloses a circulating rare earth wastewater comprehensive treatment system, which comprises a distillation kettle and a collection tank, wherein a condensation pipe is connected between the distillation kettle and the collection tank, the distillation kettle is provided with a feeding pipe for feeding acidic wastewater and a discharging pipe for discharging distillation residual liquid, the inner side wall of the distillation kettle is provided with a plurality of electric heating wires, a rotating shaft is installed on the distillation kettle through a fixing frame fixedly connected to the interior of the distillation kettle, an air supply fan is installed at the upper end of the rotating shaft, the rotating shaft is driven by a first motor, a backflow pipe is further connected between the distillation kettle and the collecting tank, a discharging opening is formed in the lower end of the collecting tank, and the collecting tank is further connected with a vacuum pump. According to the invention, the evaporation loss of condensate can be well reduced, the evaporation treatment effect is improved, and the damage of the vacuum pump is avoided.

Description

technical field [0001] The invention relates to the technical field of rare earth wastewater treatment, in particular to a circulating rare earth wastewater comprehensive treatment system. Background technique [0002] Rare earth is a valuable and non-renewable important strategic resource in our country. The current rare earth industrial production process will produce various waste water. Among them, the spray purification of rare earth concentrate roasting tail gas will produce a large amount of acid waste water. The fluorine in this kind of waste water If the content is too high, if it cannot be effectively treated, it will cause serious pollution to the environment. At present, most of the treatment methods for acidic wastewater are the process of recovery by vacuum distillation to separate the sulfuric acid and hydrofluoric acid in the acidic wastewater. However, at present The hydrofluoric acid extracted in the vacuum distillation process will easily evaporate again, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/04B08B9/087B01D5/00C02F103/16
CPCC02F1/04C02F1/043B08B9/0808B01D5/006B01D5/0006B01D5/009C02F2103/16C02F2301/063C02F2209/06C02F2209/42C02F2303/14Y02P10/20
Inventor 邹义龙黄学平
Owner NANCHANG INST OF TECH
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