A treating method of fluorine-containing waste water

A treatment method and wastewater technology, applied in the directions of water/sewage multi-stage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of difficult molecular sieve production enterprises, achieve convenient operation management, improve removal Effect of fluorine efficiency and flexible operation

Inactive Publication Date: 2015-04-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above various methods are difficult to be effectively applied in molecular sieve production enterprises. - , SO 4 2- and Al 3+ Fluoride removal treatment of fluorine-containing wastewater with high content

Method used

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  • A treating method of fluorine-containing waste water

Examples

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Comparison scheme
Effect test

Embodiment 1

[0062] This example is used to illustrate the treatment method of fluorine-containing wastewater provided by the present invention.

[0063] Production of fluorine-containing wastewater by PSRY molecular sieve: F - Content: 1441mg / L; SO 4 2- Content: 16704mg / L; Al 3+ Content: 3001mg / L; pH: 3.37.

[0064] Add 5000mg / L of aluminum chloride to 1000mL of PSRY molecular sieve production wastewater, and use NaOH aqueous solution (mass percentage concentration: 35% by weight) to adjust the pH value of the wastewater to 6.5, and stir for 20 minutes;

[0065] Then add 1000mL of the described effluent sludge to the waste water, stir and react for 20min; carry out sludge dehydration afterwards to obtain 1800mL filtrate; get the filtrate to measure F - The content is 9.1mg / L.

[0066] The filtrate is sent to the coagulation and sedimentation unit of the fluorine-free wastewater generated during the treatment of the catalyst production wastewater, mixed evenly with the coagulant (PAM ...

Embodiment 2

[0068] This example is used to illustrate the treatment method of fluorine-containing wastewater provided by the present invention.

[0069] Production of fluorine-containing wastewater by PSRY molecular sieve: F - Content: 2223mg / L; SO 4 2- Content: 24700mg / L; Al 3+ Content: 4441mg / L; pH: 2.96.

[0070] Add 2000mg / L polyaluminum chloride to 1000mL of PSRY molecular sieve production wastewater, and use NaOH aqueous solution (mass percentage concentration: 35% by weight) to adjust the pH value of the wastewater to 6.1, and stir for 15 minutes;

[0071] Add 2000mL of said effluent sludge to the waste water subsequently, stir and react for 20min; carry out sludge dehydration afterwards to obtain 2700mL filtrate; get the filtrate to measure F - The content is 6.3mg / L.

[0072] The filtrate is sent to the coagulation and sedimentation unit of the fluorine-free wastewater generated during the treatment of the catalyst production wastewater, mixed evenly with the coagulant (PAM ...

Embodiment 3

[0074] This example is used to illustrate the treatment method of fluorine-containing wastewater provided by the present invention.

[0075] Production of fluorine-containing wastewater by PSRY molecular sieve: F - Content: 2036mg / L; SO 4 2- Content: 22200mg / L; Al 3+ Content: 4075mg / L; pH: 3.28.

[0076] Add 5000 mg / L polyaluminum chloride to 1000 mL of PSRY molecular sieve production wastewater, and use NaOH aqueous solution (mass percentage concentration: 30% by weight) to adjust the pH value of the wastewater to 7.1, and stir for 30 minutes;

[0077] Then add 3000mL of said effluent sludge to the waste water, stir and react for 15min; carry out sludge dehydration afterwards to obtain 3600mL filtrate; get the filtrate to measure F - The content is 7.2mg / L.

[0078] The filtrate is sent to the coagulation and sedimentation unit of the fluorine-free wastewater generated during the treatment of the catalyst production wastewater, mixed evenly with the coagulant (PAM with a...

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Abstract

A treating method of fluorine-containing waste water is disclosed. The fluorine-containing waste water comprises F-, SO4<2-> and Al<3+>. The method includes: bringing the fluorine-containing waste water and a water-soluble aluminum-source fluorine removing agent into contact and adjusting the pH value of the fluorine-containing waste water to be not lower than 5 to perform neutralization and sedimentation reactions; bringing the fluorine-containing waste water after the neutralization and sedimentation reactions and discharged sludge from a coagulating sedimentation treating unit of waste water free of fluorine into contact; and subjecting the obtained mixture to sludge dehydration to obtain dehydrated sludge and filtrate. The method can perform effective fluorine removal treatment for the fluorine-containing waste water having high contents of the F-, the SO4<2-> and the Al<3+>.

Description

technical field [0001] The invention relates to a treatment method for fluorine-containing wastewater, in particular to a treatment method for effectively removing fluorine from fluorine-containing wastewater produced in the molecular sieve production process. Background technique [0002] Phosphorus-containing skeleton silicon-rich ultra-stable Y molecular sieve (PSRY molecular sieve) is a new type of skeleton silicon-rich molecular sieve prepared by NaY molecular sieve through hydrothermal roasting and complex acid dealumination of silicon. It is prepared with PSRY molecular sieve as the main active component Fluid catalytic cracking (FCC) catalyst has the characteristics of good coke selectivity, high gasoline octane number, strong heavy oil cracking ability, and high diesel yield. After successful industrial trial production, FCC with PSRY molecular sieve as the main active component The catalyst has been used in many heavy oil catalytic cracking units across the country...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/28C02F101/14C02F101/10
Inventor 桑军强马欣高峰
Owner CHINA PETROLEUM & CHEM CORP
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