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Treatment method of high-concentration fluorine-contained industrial wastewater

An industrial wastewater, high-concentration technology, used in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. simple craftsmanship

Inactive Publication Date: 2010-09-15
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Even if polyacrylamide, polyferric aluminum sulfate and other flocculants are added for one-time treatment, the requirements cannot be met.

Method used

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  • Treatment method of high-concentration fluorine-contained industrial wastewater
  • Treatment method of high-concentration fluorine-contained industrial wastewater
  • Treatment method of high-concentration fluorine-contained industrial wastewater

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Embodiment Construction

[0015] The following is a detailed description of a treatment method for high-concentration fluorine-containing industrial wastewater according to the accompanying drawings: the wastewater generated by washing the fluoride salt in polyether ketone has a temperature of 90°C, a weight of about 4.0 tons / pot, and a concentration of 6000-10000mg / L. .

[0016] Step one a. at first fluorine-containing waste water is sent in 4.0 tons of reactor 4, as figure 1 As shown, b. then pour 91kg of CaO, 0.21kg of chitosan, and 0.29kg of lignin into the beating tank 1 with a mass percentage of 85%, and c. open the bottom valve of the tank and put fluorine-containing waste water into the beating tank 1 , d. Start the beating motor 3 to stir for three minutes, e. Then start the slurry pump 2 immediately, send all the slurry in the beating tank 1 into the reactor 4, stop the slurry pump 2, f. start the reactor stirring motor to stir 30 minutes;

[0017] Step 2a. Continue to stir in the stirring ...

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Abstract

The invention relates to a treatment method of high-concentration fluorine-contained industrial wastewater, belonging to the fields of environmental protection and petrochemical industry. The treatment method of high-concentration fluorine-contained industrial wastewater comprises the following steps of: washing fluoride salt wastewater in polyether ketone with water at 90 DEG C, wherein the weight is 4.0 ton / kettle and the concentration is 6000-10000 mg / L ; adding 91kg of CaO with mass fraction of 85 percent, 0.21kg of chitosan and 0.29kg of lignin to the water; stirring and reacting for 30 min; adding 40kg of CaCl2, 2kg of FeCl2, 2kg of AlCl3 and 0.4kg of polyacrylamide; then, stirring and reacting for 30 min; and detecting, draining, entering a settlement pond to settle, detecting and draining. Wastewater has high temperature reaching 80-90 DEG C, can reach standard by treatment at room temperature; and the invention also has the advantages of simple process, one time treatment, little use equipment, one time settlement, short time and very stable effluent concentration reaching the international first-level emission standard.

Description

technical field [0001] The invention belongs to the fields of environmental protection and petrochemical industry, and in particular relates to a method for one-time treatment of high-concentration fluorine-containing industrial wastewater to meet the first-level discharge standard of the national standard. Background technique [0002] During the production of polyether ketone, F in fluorine-containing organic compounds - After being replaced, inorganic fluorine salts are generated and doped in the product, and then the fluorine salts are separated by washing with water, and a large amount of F - Disposal of waste water became a problem. It is a feasible way to recover fluoride salt by evaporation. But the amount of waste water is large, the mass content of fluorine salt is only 0.6-0.7%, the energy consumption is high, and it is very uneconomical. The current fluorine-containing wastewater treatment methods usually use electrochemical methods, ion adsorption exchange me...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/56C02F101/14
Inventor 王树江王立托王玉铭石秀敏乔迁
Owner CHANGCHUN UNIV OF TECH
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