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Method for removing acidic phosphorus-containing wastewater by utilizing modified fluorgypsum

A technology of fluorogypsum and its application method, which is applied in the direction of energy wastewater treatment, chemical instruments and methods, water/sewage treatment, etc., can solve the problems of serious environmental pollution, difficulty in being fully utilized, occupying land, etc., and achieves simple and easy operation, Remarkable effect of phosphorus removal

Inactive Publication Date: 2016-02-24
王小春
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem mainly solved by the present invention: only a small part of fluorine gypsum, which is a highly corrosive and toxic substance, is used as building materials, and most of it is piled up as waste, which not only occupies land, but also seriously pollutes the environment, making it difficult to obtain sufficient The current situation of utilization provides a method for removing acidic phosphorus-containing wastewater by modifying waste fluorine gypsum to prepare phosphorus removal wastewater adsorbents. In this method, waste fluorine gypsum is crushed into powder and then soaked in oxalic acid. After soaking, titanium hydroxide is added. , stirred and filtered to obtain a precipitate, then dried and calcined the obtained precipitate, then added sodium hydroxide to soak, and added sea salt to stand still to form a precipitate, finally dried the precipitate, calcined, cooled to room temperature to obtain mixed phosphorus removal powder, when used, put the prepared mixed phosphorus removal powder into acidic phosphorus-containing wastewater, and then

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0022]First, take 250g of discarded fluorogypsum from the storage yard, put it into a jet mill for crushing, and after crushing for 10 minutes, pass through a 130-mesh steel sieve to obtain fluorogypsum powder for later use; then take 150g of fresh spinach, and manually select to remove rotten leaves, Put the weeds in deionized water, wash once to remove the residual dirt on the surface, then evenly spread the washed spinach in the pineapple sieve, and put it in the sun to turn it in the sun, and turn it every 2 hours until the spinach is in the sun. When the water content is 2%, stop tumbling, move it to a pulverizer, pulverize for 5 minutes, and pass through a 120 mesh sieve to obtain spinach powder, which is placed in a 2L beaker; then add 1000mL mass concentration It is a 78% ethanol solution, mixed well, placed in an ultrasonic oscillator, set the ultrasonic frequency to 22KHz, and the ultrasonic power to 100W. After ultrasonic oscillation for 1 hour, filter to remove the ...

example 2

[0025] Firstly, take 300g of discarded fluorine gypsum from the storage yard, put it into a jet mill for crushing, and pass through a 140-mesh steel sieve after crushing for 13 minutes to obtain fluorine gypsum powder for later use; then take 200g of fresh spinach, and manually select to remove rotten leaves, After weeds, put them in deionized water, wash them twice, remove the residual dirt on the surface, then spread the washed spinach evenly in the pineapple sieve, put them in the sun and turn them in the sun, and turn them every 2 hours until the spinach is in the sun. When the water content is 3%, stop tumbling, move it to a pulverizer, pulverize for 7 minutes, and pass through a 125 mesh sieve to obtain spinach powder, which is placed in a 2L beaker; then add 1050mL mass concentration It is a 78% ethanol solution, mixed well, placed in an ultrasonic oscillator, set the ultrasonic frequency to 28KHz, and the ultrasonic power to 110W, and after ultrasonic oscillation for 1....

example 3

[0028] First, take 350g of discarded fluorogypsum from the storage yard, put it into a jet mill for crushing, and after crushing for 15 minutes, pass through a 150-mesh steel sieve to obtain fluorogypsum powder for future use; then take 220g of fresh spinach, and manually select to remove rotten leaves, Put the weeds in deionized water, wash 3 times, remove the residual dirt on the surface, then spread the washed spinach evenly in the pineapple sieve, put it in the sun and turn it in the sun, and turn it every 2 hours until the spinach is in the sun. When the water content is 4%, stop tumbling, move it to a pulverizer, pulverize it for 8 minutes, and pass through a 130 mesh sieve to get spinach powder, which is placed in a 2L beaker; then add 1100mL mass concentration to the above beaker containing spinach powder It is a 78% ethanol solution, fully mixed, placed in an ultrasonic oscillator, set the ultrasonic frequency to 30KHz, and the ultrasonic power to 120W. After ultrasoni...

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Abstract

The invention discloses a method for removing acidic phosphorus-containing wastewater by utilizing modified fluorgypsum and belongs to the technical field of fluorgypsum treatment. Waste fluorgypsum is crushed into powder, oxalic acid is added for soaking, titanium hydroxide is added after soaking, the mixture is stirred and filtered, sediments are obtained and then are dried and calcined, sodium hydroxide is added for soaking, sea salt is added, the mixture is left to stand, precipitates are generated and are finally, dried, calcined and cooled to the room temperature, and mixed phosphorous removal powder is obtained; during use, the prepared phosphorous removal powder is added to the acidic phosphorus-containing wastewater. Living examples prove that the method is simple and easy to operate, resources are sufficiently utilized, waste utilization is realized, the phosphorous removal effect is remarkable, and the phosphorous removal rate is higher than 90%.

Description

technical field [0001] The invention discloses a method for removing acidic phosphorus-containing wastewater by using modified fluorogypsum, and belongs to the technical field of fluorogypsum treatment. Background technique [0002] Fluorogypsum is the main by-product in the production process of hydrofluoric acid and sodium fluoroaluminate, mainly produced in inorganic fluoride and organic fluoride production plants and gas hydrofluoric acid production plants; fluorogypsum is mainly anhydrous calcium sulfate, generally can be Used to make building materials, the calcium sulfate content is generally high, up to 80% to 90%. [0003] According to statistics, about 3.6t of anhydrous fluorogypsum is generated for every 1t of hydrofluoric acid produced. The main component of fluorogypsum is calcium sulfate, and contains some calcium fluoride and other fluorides, and sometimes H 2 SO 4 The content of fluorine gypsum is very high, which makes the discharged fluorine gypsum acidi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F1/58B01J20/04B01J20/30
CPCY02W10/37C02F1/281B01J20/045B01J20/046B01J2220/42B01J2220/4806B01J2220/4812B01J2220/485B01J2220/4887C02F1/58C02F2305/04
Inventor 高大元张帆
Owner 王小春
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