System and method for treating fluorine-containing acid wastewater after graphite purification

A technology for acid wastewater and graphite purification, which is applied in natural water treatment, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc. It can solve the problems of difficult operation, high treatment cost and large sludge volume. Achieve the effect of fast processing speed, good purification effect and low operating cost

Inactive Publication Date: 2008-10-22
侯玉奇
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Problems solved by technology

[0002] A large amount of fluorine-containing acidic wastewater will be produced in the production of graphite purification, which needs to be treated before it can be discharged. The traditional method uses Ca(OH) 2 、CaCL 2 After precipitation, add AL 2 (SO4) 3 Coagulation treatment of fluorine-containing acidic wastewater produced in the graphite purification process has high treatment cos

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  • System and method for treating fluorine-containing acid wastewater after graphite purification

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[0021] The wastewater first enters the first-stage reaction tank. The volume of the tank is 16.5 cubic meters. There is a large amount of CaO suspended in the tank. When the height of the wastewater surface in the tank reaches 1.3 meters (that is, the liquid level submerges the suspended calcium oxide), close the small outlet valve to the original open. 1 / 3 of the temperature, so that the fluorine-containing wastewater in the pool is fully mixed with Ca(OH) 2 contact reaction. After the reaction time lasted for 30 minutes, the water outlet valve was fully opened, so that a large amount of waste water after the reaction treatment entered the second-stage reaction tank. Close the outlet valve and the inlet valve. Open the NaOH liquid caustic soda tank to neutralize the waste water. Use a pH meter to detect and control the pH value to be between 11 and 13. At this time, a flocculant is sprayed in an amount of 2.5mg / L to 20mg / L. The flocculant and the water have not reacted compl...

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Abstract

The invention relates to a treatment system for fluorine-contained acid waste water after the purification of graphite and a method thereof. The treatment system comprises a three-level reaction pool or retort and purification settlement pools with at least one level; a chemical storage container is suspended in the reaction pool of each level, the bottom of the pool is provided with a settled residue chamber and the purification settlement pool of each level is provided with a high pressure sprinkling device. The waste water treatment method includes that waste water first enters a first reaction pool where calcium compound is added to settle F<-> and metal ions in the waste water; then the waste water enters a second reaction pool where alkali solution and a flocculant are added to neutralize the waste water and settle the remained metal ions; and then the waste water enters a third reaction pool where aluminum salt is added to neutralize the waste water into neutral status; then the waste water enters the purification settlement pool to settle and filter harmful suspended substances in the waste water. The treatment system and the treatment method of the invention have the advantages of low construction costs, operation costs and treatment costs, easy operation control and good waste water treatment effect, being more particularly applicable to the small-sized and medium-sized enterprises participating in the market competition, etc.

Description

technical field [0001] The invention relates to a sewage treatment system and method, in particular to a treatment system and method for fluorine-containing acid waste water purified by graphite. technical background [0002] In the production of graphite purification, a large amount of acidic wastewater containing fluorine will be generated, which needs to be treated to meet the standard before discharge. The traditional method uses Ca(OH) 2 , CaCL 2 After precipitation, add AL 2 (SO4) 3 Coagulation treatment of fluorine-containing acid wastewater produced in the process of graphite purification, the treatment cost is high, and the amount of sludge produced is large, which is not easy to operate. Therefore, it provides a small investment, low operating cost, and convenient operation, which is especially suitable for participating in market competition. The treatment system and method of fluorine-containing acidic wastewater after graphite purification adopted by small an...

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Application Information

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IPC IPC(8): C02F9/04C02F1/52C02F101/14C02F103/34
Inventor 侯玉奇
Owner 侯玉奇
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