Concentration apparatus for wet method phosphoric acid refinement

A concentration device and wet-process phosphoric acid technology, which is applied in the direction of phosphorus compounds, chemical instruments and methods, inorganic chemistry, etc., can solve problems such as difficult to achieve flash evaporation effect, difficulty in small liquid droplets, and inability to form continuous production

Active Publication Date: 2012-04-25
吴杰
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the defects and problems existing in the prior art that it is difficult to achieve the flash evaporation effect, the small droplets of the feed liquid are easy to escape with the secondary steam, and continuous production cannot be formed, and to provide a method that can achieve the flash evaporation effect, The fine droplets of the feed liquid are not easy to escape with the secondary steam, and can form a continuous production concentration device for wet-process phosphoric acid refining

Method used

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  • Concentration apparatus for wet method phosphoric acid refinement
  • Concentration apparatus for wet method phosphoric acid refinement
  • Concentration apparatus for wet method phosphoric acid refinement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Example 1, forced circulation under negative pressure:

[0052] see figure 1 Connect the vacuum port 131 on the condensate tank 13 to the vacuum system and turn on the vacuum system. The concentrated feed liquid enters the forced circulation evaporation system through the feed port 51, and is sent to the heater 3 for heating through the forced circulation pump 2, and is heated to After a certain temperature, it enters the flash chamber 1, and the heated feed liquid releases secondary steam in the flash chamber 1, and the secondary steam passes through the defoaming pipe 10 to initially collect the liquid foam, and after the cyclone separator 11 removes the foam for the second time, Condensed in the condenser 12, the condensate flows into the condensate tank 13. If it is necessary to remove fluorine and chlorine, then open the steam pipe 14 to pass steam to the feed liquid in the flash chamber 1, which can promote the escape of fluorine and chlorine.

[0053] After the...

Embodiment 2

[0054] Embodiment 2, forced circulation under normal pressure situation:

[0055] see Figure 5 , the feed liquid that needs to be concentrated enters the forced circulation evaporation system through the feed port 51, and is sent to the heater 3 to be heated by the forced circulation pump 2. After being heated to a certain temperature, it enters the flash chamber 1, and the heated feed liquid is in the flash chamber 1. The secondary steam is released, and the secondary steam passes through the defoaming pipe 10 to initially collect the liquid foam, and after the cyclone separator 11 conducts secondary defoaming, it is condensed in the condenser 12 and flows into the condensate tank 13. If it is necessary to remove fluorine, chlorine or recover the extractant, the steam pipe 14 is opened to steam the feed liquid in the flash chamber 1, which can promote the escape of fluorine, chlorine and the extractant.

[0056] After the feed liquid is evaporated, the feed liquid that reac...

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Abstract

The invention relates to a concentration apparatus for wet method phosphoric acid refinement. The concentration apparatus comprises a flash evaporation chamber, a forced circulation pump, a heater, a concentration material liquid outlet pipe, a concentration material fluid inner pipe, a foam removing pipe, a cyclone separator and a steam pipe. A secondary steam outlet and a lower circulation pipeare respectively arranged on the upper end and the lower end of the flash evaporation chamber. An upper circulation pipe and the concentration material liquid outlet pipe are respectively arranged onthe left side and the right side of the flash evaporation chamber. The height of the inner pipe opening on the concentration material fluid inner pipe is less than the height of the pipe opening of the upper circulation pipe. One end of an atmospheric pressure synchronization pipe is communicated with the concentration material liquid outlet pipe, and the other end of the atmospheric pressure synchronization pipe is communicated with the flash evaporation chamber or atmosphere. The foam removing pipe is connected with the secondary steam outlet. The other end of the secondary steam outlet is connected with the cyclone separator. The other end of the cyclone separator is connected with a condensate groove by a condenser. The steam pipe is arranged on a position close to the bottom of the flash evaporation chamber. With the design of the present invention, the flash evaporation effect is achieved, the siphon is prevented, it is ensured that the tiny droplet of the material liquid does not easily escape along with the secondary steam, such that the requirement of steam stripping defluoridation or steam stripping extractant recovery can be met so as to form a continuous production.

Description

technical field [0001] The invention relates to a concentrating device, in particular to a concentrating device for wet-process phosphoric acid refining, which is particularly suitable for improving the evaporation effect, preventing the siphon effect, defoaming and meeting the needs of stripping defluorination or stripping recovery of extractant. Background technique [0002] At present, evaporators are widely used in chemical, pharmaceutical, food and other fields, and generally include natural circulation evaporators and forced circulation evaporators. Among them, forced circulation evaporators are generally used for the concentration of thick or crystallized feed liquids. [0003] The Chinese patent authorization announcement number is CN101391784B, and the invention patent issued on April 20, 2011 discloses a full forced circulation evaporator. The internal structure of the boiling chamber in the full forced circulation evaporator is too complicated, and a lot of Baffle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/234
Inventor 吴杰
Owner 吴杰
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