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Equipment and method for evaporation recovery of yellow phosphorus from phosphorus mud

A phosphorus mud and yellow phosphorus technology, applied in chemical instruments and methods, phosphorus compounds, inorganic chemistry, etc., can solve the problems of harsh operating environment and inconvenient operation, and achieve good sealing effect, low corrosion, and low corrosion of mud and phosphorus. Effect

Active Publication Date: 2016-09-21
瓮安县龙马磷业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, these methods usually carry out the reaction in a reactor, and release the phosphorus from the bottom after the end. Although the structure is simple, it is not easy to operate, and the phosphorus pentoxide gas produced by the reaction is not absorbed and discharged into the atmosphere. Operation The environment is quite bad

Method used

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  • Equipment and method for evaporation recovery of yellow phosphorus from phosphorus mud
  • Equipment and method for evaporation recovery of yellow phosphorus from phosphorus mud

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] About 2000 kg of phosphorus mud with a yellow phosphorus content of 45.1% was driven into 5m? ? In the reaction kettle (the reaction kettle has 1m of water in advance), open the jacket steam heating to maintain the temperature at about 75 degrees Celsius, continuously and slowly put 60 kg of calcium carbonate powder into it while stirring, keep stirring for 8 hours and then inject phosphorus in the mud storage tank.

[0032] Turn on the gas heating, adjust the temperature of the combustion chamber to 450-500°C, slowly enter the phosphorus sludge in the phosphorus sludge storage tank into the evaporator through the feed port, and after 96 hours of continuous evaporation, finally obtain about 900 kg of yellow phosphorus and 470 kg of residue kg, the purity of the yellow phosphorus obtained is 99.95%, and the total phosphorus content (in terms of phosphorus pentoxide) in the residue is 15.6%, and the residue does not emit smoke when placed in the air.

Embodiment 2

[0034] About 2000 kg of phosphorus mud with a yellow phosphorus content of 27.1% was driven into the 5m? ? In the reaction kettle (the reaction kettle has 1m of water in advance), open the jacket steam heating to maintain the temperature at about 75 degrees Celsius, continuously and slowly put 50 kg of calcium carbonate powder into it while stirring, keep stirring for 8 hours and then inject phosphorus in the mud storage tank.

[0035] Turn on the gas heating, adjust the temperature of the combustion chamber to 450-550°C, slowly enter the phosphorus sludge in the phosphorus sludge storage tank into the evaporator through the feed port, and after continuous evaporation for 96 hours, finally obtain about 500 kg of yellow phosphorus and 420 kg of residue kg, the purity of yellow phosphorus obtained is 99.95%, and the total phosphorus content (in terms of phosphorus pentoxide) in the residue is 19.6%, and the residue does not emit smoke when placed in the air.

Embodiment 3

[0037] About 2000 kg of phosphorus mud with a yellow phosphorus content of 17.6% was driven into 5m? ? In the reaction kettle (the reaction kettle has 1m of water in advance), open the jacket steam heating to maintain the temperature at about 75 degrees Celsius, continuously and slowly put 60 kg of calcium carbonate powder into it while stirring, keep stirring for 8 hours and then inject phosphorus in the mud storage tank.

[0038] Turn on the gas heating, adjust the temperature of the combustion chamber to 500-600°C, slowly enter the phosphorus sludge in the phosphorus sludge storage tank into the evaporator through the feed port, and after continuous evaporation for 96 hours, finally obtain about 300 kg of yellow phosphorus and a residue of 510 kg, the purity of yellow phosphorus obtained is 99.95%, and the total phosphorus content (in terms of phosphorus pentoxide) in the residue is 14.6%, and the residue does not emit smoke when placed in the air.

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Abstract

The invention provides equipment for evaporation recovery of yellow phosphorus from phosphorus mud. The equipment comprises a spiral conveying evaporator. The inner side of the spiral conveying evaporator is provided with a conveying chamber, which is internally equipped with a conveying blade running through the conveying chamber from head to tail. An upper wall of the spiral conveying evaporator is provided with a projecting chamber, which is an evaporation chamber, and an upper wall of the evaporation chamber is provided an exhaust port. Phosphorus mud with a neutralizer added is conveyed to a phosphorus mud storage container through rotation; the phosphorus mud enters the phosphorus mud evaporation equipment from an inlet of the phosphorus mud storage container and is conveyed to the evaporation chamber through the conveying blade inside the spiral conveying evaporator; yellow phosphorus is recovered in the evaporator through high-temperature evaporation; and evaporation waste residue can be treated through direct burial. Through the equipment, elementary phosphorus can be totally recovered from phosphorus mud. The equipment is well sealed during the whole process and produces no obvious smoke. The phosphorus recovery rate is high, and the residue after yellow phosphorus recovery is harmless.

Description

technical field [0001] The invention relates to a method and equipment for evaporating and recovering yellow phosphorus in phosphorus mud. Background technique [0002] At present, the recovery methods of phosphorus sludge can be divided into phosphorus sludge burning acid method, physical separation and chemical separation. [0003] Phosphorus mud burning acid method is to burn phosphorus mud directly, and the phosphorus pentoxide generated by burning yellow phosphorus is dehydrated and absorbed into phosphoric acid in the absorption tower. The equipment for this method includes incinerators and absorption equipment. [0004] Physical separation is mainly through extraction or filtration separation, and the main equipment is extraction equipment or filter. [0005] There are mainly the following types of chemical separation: hydrochloric acid-nitric acid method, soda ash method, ammonium solution method, ammonium bicarbonate-caustic soda-hydrogen peroxide method. At pres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/027
CPCC01B25/027
Inventor 余有平王斌吴让鹏
Owner 瓮安县龙马磷业有限公司
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