Method for treating highly concentrated ammonia nitrogen in petroleum refining wastewater

A high-concentration technology for oil refining wastewater, applied in the field of high-concentration ammonia nitrogen, can solve problems such as aging, environmental secondary pollution, and ammonia gas emissions, and achieve the effects of low cost, small volume, and high removal rate

Active Publication Date: 2015-09-23
响水华清污水处理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main technical problem to be solved by the present invention is to provide an organic composite denitrification agent modified magnesium aluminum in view of the fact that there is ammonia gas discharge in the treatment process of high-concentration ammonia-nitrogen wastewater in the current organic composite denitrification agent combined with blow-off method, which causes secondary environmental pollution. Iron hydrotalcite nano-magnetic adsorption material can absorb high concentration ammonia nitrogen in wastewater, and after saturation, it can age the surface layer of the adsorption material. Under the action of external magnetic field and water flow, the adsorption material can be renewed without regeneration
[0005] In order to solve the problem of secondary pollution caused by the failure of the above method, a method for treating ammonia nitrogen in pesticide wastewater with an organic composite denitrification agent modified magnesium aluminum iron hydrotalcite magnetic nano-adsorption material is provided. Secondary pollution caused by ammonia gas emission when compound denitrification agent combined with stripping method is used to treat high-concentration ammonia-nitrogen wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0029] First weigh 5.1g of magnesium nitrate, 2.5g of aluminum nitrate, and 4.2g of ferric nitrate and dissolve them in 260ml of absolute ethanol solution containing 3.52g of urea, stir at room temperature for 1h, pour into a hydrothermal reaction kettle and heat to 140°C, and react Cool to room temperature after 8.5 hours, then wash with ethanol and deionized water, and dry at 60°C for 8 hours to obtain nano-magnesium-aluminum-iron hydrotalcites, and then use the above-mentioned nano-magnesium-aluminum-iron hydrotalcites successively with a mass concentration of 36.5% concentrated Soak in hydrochloric acid and saturated potassium hydroxide solution for 7 hours, place it in a muffle furnace, dry it at a temperature of 105°C, and then magnetize it near a magnetic field. In 10g of organic composite denitrification agent, which contains 1g of nicotine, 2g of salicylaldehyde, and 7g of 2-butenal three kinds of substances were stirred for 33 minutes, and then the modified nano-magne...

example 2

[0031]First weigh 10.4g of magnesium nitrate, 6.7g of aluminum nitrate, and 12.6g of ferric nitrate, dissolve them in 600ml of absolute ethanol solution containing 7.2g of urea, stir at room temperature for 1h, pour into a hydrothermal reaction kettle and heat to 140°C, and react Cool to room temperature after 10.4h, then wash with ethanol and deionized water, and dry at 60°C for 8h to obtain nano-magnesium-aluminum-iron hydrotalcite, and then use the above-mentioned nano-magnesium-aluminum-iron hydrotalcite successively with a mass concentration of 36.5%. Soak in hydrochloric acid and saturated potassium hydroxide solution for 7 hours, place it in a muffle furnace, dry it at a temperature of 105°C, and then magnetize it near a magnetic field. In 20g of organic composite denitrification agent, which contains 6g of bicarbonate, 9g of salicylaldehyde, and 5g of 2-butenal, after stirring for 40min, the modified nano-magnesium-aluminum-iron hydrotalcite material was cleaned with de...

example 3

[0033] First weigh 7.0g of magnesium nitrate, 5.8g of aluminum nitrate, and 8.7g of ferric nitrate and dissolve them in 520ml of absolute ethanol solution containing 5.5g of urea, stir at room temperature for 1h, pour into a hydrothermal reaction kettle and heat to 140°C, and react Cool to room temperature after 11 hours, then wash with ethanol and deionized water, and dry at 60°C for 8 hours to obtain nano-magnesium-aluminum-iron hydrotalcite, and then wash the nano-magnesium-aluminum-iron hydrotalcite prepared above with concentrated hydrochloric acid with a mass concentration of 36.5%. Soak in saturated potassium hydroxide solution for 7 hours, place in a muffle furnace, dry at a temperature of 105°C, and then magnetize near a magnetic field, then immerse the nano-magnesium aluminum iron hydrotalcite material after pickling, alkali leaching and magnetization into 30g In the organic composite denitrification agent, which contains 7.5g bicarbonate, 12g salicylaldehyde, and 10....

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Abstract

The invention discloses a method for treating highly concentrated ammonia nitrogen in petroleum refining wastewater and belongs to the field of environment-friendly ammonia nitrogen wastewater treatment. An organic composite denitrifier modified Mg-Al-Fe hydrotalcite magnetic nanometer adsorption material is obtained by steps of preparing, magnetizing, modifying, drying and activating Mg-Al-Fe hydrotalcite. The material is used for treating high-concentration ammonia nitrogen in the petroleum refining wastewater, the treatment efficiency is high, and ammonia gas and a precipitate are not generated; more importantly, after the modified hydrotalcite absorbs the ammonia nitrogen, the hydrotalcite can strip off automatically layer by layer without being regenerated, and the residue after stripping does not contain water and is small in size; the material is an environment-friendly ammonia nitrogen wastewater treating material; the finally measured ammonia nitrogen content in effluent of the wastewater is less than 0.2mg / L, and the denitrogenation efficiency is over 99.9 percent.

Description

technical field [0001] The invention discloses a method for high-concentration ammonia nitrogen in oil refinery wastewater, which belongs to the field of sewage treatment. Background technique [0002] Refining wastewater mainly comes from the production wastewater produced in the process of direct distillation of crude oil, cracking and distillation of heavy oil, and refining of certain fractions. Among them, high-concentration ammonia nitrogen can be converted into nitrite under certain conditions. If it is consumed for a long time, Nitrite in water will combine with protein to form nitrosamine, which is a strong carcinogen, which is extremely harmful to human health and has an inhibitory effect on the activity of microorganisms. [0003] At present, the methods for treating high-concentration ammonia-nitrogen in oil refinery wastewater include breakpoint chlorination, selective ion exchange, air stripping, and steam stripping; Wastewater Ammonia Nitrogen Removal Device",...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28B01J20/22
Inventor 陈毅忠张帆
Owner 响水华清污水处理有限公司
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