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A treatment method for fluorine-containing phosphorus-containing wastewater

A treatment method and wastewater technology, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., to achieve the effect of improving efficiency and reducing consumption

Active Publication Date: 2017-11-03
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. - 、PO 4 3- , SO 4 2- and Al 3+ Fluorine and phosphorus removal treatment of fluorine-containing and phosphorus-containing wastewater with high content

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] This example is used to illustrate the treatment method of fluorine-containing and phosphorus-containing wastewater provided by the present invention.

[0058] PSRY molecular sieves produce fluorine-containing phosphorus-containing wastewater: F - Content: 1441mg / L; PO 4 3- -P content: 77.3mg / L; SO 4 2- Content: 16704mg / L; Al 3+ Content: 3001mg / L; SiO 2 Content: 107mg / L; pH: 3.37.

[0059] Molecular sieves produce fluorine- and phosphorus-free wastewater: SO 4 2- Content: 1350mg / L; Al 3+ Content: 1056mg / L; SiO 2 Content: 225mg / L; pH: 4.49.

[0060] Take 1000mL of PSRY molecular sieve to produce fluorine-containing and phosphorus-containing wastewater, add 2500mg / L of aluminum chloride in wastewater (500mg / L wastewater in terms of aluminum element), mix well, use NaOH to adjust the pH value to 6.7, and stir for 20 minutes;

[0061] Then add 2mg / L PAM of waste water, mix well and carry out coagulation aiding reaction for 2min, then filter and dehydrate to obtai...

Embodiment 2

[0064] This example is used to illustrate the treatment method of fluorine-containing and phosphorus-containing wastewater provided by the present invention.

[0065] PSRY molecular sieves produce fluorine-containing phosphorus-containing wastewater: F - Content: 2223mg / L; PO 4 3- -P content: 107.9mg / L; SO 4 2- Content: 24700mg / L; Al 3+ Content: 4441mg / L; SiO 2 Content: 386mg / L; pH: 2.96.

[0066] Molecular sieves produce fluorine- and phosphorus-free wastewater: SO 4 2- Content: 1050mg / L; Al 3+ Content: 855mg / L; SiO 2 Content: 195mg / L; pH: 4.05.

[0067] Take 1000mL of PSRY molecular sieve to produce fluorine-containing and phosphorus-containing wastewater, add 2000mg / L of polyaluminum chloride (calculated as aluminum element is 310mg / L of wastewater), mix well, use NaOH to adjust the pH value to 6.9, and stir for 15 minutes;

[0068] Then add PAM of 3mg / L waste water, mix evenly for coagulation aiding reaction for 2min, then filter and dehydrate to obtain filtrate...

Embodiment 3

[0071] This example is used to illustrate the treatment method of fluorine-containing and phosphorus-containing wastewater provided by the present invention.

[0072] PSRY molecular sieves produce fluorine-containing phosphorus-containing wastewater: F - Content: 2036mg / L; PO 4 3- -P content: 93.2mg / L; SO 4 2- Content: 22200mg / L; Al 3+ Content: 4075mg / L; SiO 2 Content: 432mg / L; pH: 3.28.

[0073] Molecular sieves produce fluorine- and phosphorus-free wastewater: SO 4 2- Content: 950mg / L; Al 3+ Content: 655mg / L; SiO 2 Content: 135mg / L; pH: 4.05.

[0074] Take 1000mL of PSRY molecular sieve to produce fluorine-containing and phosphorus-containing wastewater, add 3000mg / L of polyaluminum chloride (465mg / L wastewater in terms of aluminum element), adjust the pH value to 6.9 with NaOH, and stir for 20 minutes;

[0075] Then add 2mg / L PAM of waste water, mix well and carry out coagulation aiding reaction for 2min, then filter and dehydrate to obtain filtrate;

[0076] 50...

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PUM

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Abstract

The invention discloses a method for treating fluorine-containing and phosphorus-containing wastewater, characterized in that, the fluorine-containing and phosphorus-containing wastewater contains F-, PO43-, SO42- and Al3+, and the treatment method for the fluorine-containing and phosphorus-containing wastewater includes: 1) Under the condition that the pH value is 5-9, the fluorine-containing phosphorus-containing wastewater is contacted with the aluminum-containing compound of F- and PO43-in the precipitable wastewater to obtain aqueous sludge; 2) the aqueous sludge obtained in step 1) is The sludge is subjected to sludge dehydration treatment to obtain dewatered sludge and liquid phase; 3) The liquid phase obtained in step 2) is mixed with other wastewater for coagulation and sedimentation treatment to obtain treated effluent, wherein the other wastewater is not Wastewater containing fluoride and phosphorus. The method of the present invention is particularly suitable for the treatment of fluorine-containing and phosphorus-containing wastewater with relatively high SO42-content.

Description

technical field [0001] The invention relates to a treatment method for fluorine-containing and phosphorus-containing wastewater, in particular to a treatment method for effectively removing fluorine and phosphorus from fluorine-containing and phosphorus-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. 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. Since the 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 countr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F101/14
Inventor 桑军强马欣
Owner CHINA PETROLEUM & CHEM CORP
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