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Method for treating fluoride waste water and gas

A fluoride and wastewater technology, applied in chemical instruments and methods, separation methods, water/sewage treatment, etc., can solve the problems of high fluoride ion residue, long treatment time and high cost, and achieve the reduction of residual amount, short treatment period, low cost effect

Inactive Publication Date: 2012-02-15
SICHUAN MINGJING PHOTOELECTRIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the shortcomings of the existing fluoride waste water and waste gas treatment methods, and provide a new type of fluoride waste water and waste gas treatment method, which overcomes the high residual after fluoride ion treatment in the traditional treatment method, does not reach the industrial discharge standard, and takes a long time for treatment. , high cost and easy to cause secondary pollution and other disadvantages

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] [Example 1] A method for treating fluoride waste water and waste gas. The fluoride waste gas is treated into fluoride waste water, and then the waste gas generated in the process of treating fluoride waste water is treated into waste water, and the process is circulated until the fluoride is completely absorbed. Include the following steps:

[0014] (1) Connect the feeding port and gas outlet on the cover of the reaction kettle that produces fluoride waste gas to the two inlets of the three-way pipe respectively, the outlet of the three-way pipe is connected to the inlet connected to the inner membrane absorption tower, and the inner membrane absorption tower The outlet is connected to the jet vacuum pump;

[0015] (2) Turn on the jet vacuum pump and spray the inner membrane absorption tower with clean water. When the temperature of the sprayed fluoride wastewater reaches 50°C and the acidity reaches 4N, stop the spraying of the inner membrane absorption tower;

[0016...

Embodiment 2

[0018] [Example 2] A method for treating fluoride waste water and waste gas. The fluoride waste gas is treated into fluoride waste water, and then the waste gas generated in the process of treating fluoride waste water is treated into waste water, and the process is circulated until the fluoride is completely absorbed. Include the following steps:

[0019] (1) Connect the feeding port and gas outlet on the cover of the reaction kettle that produces fluoride waste gas to the two inlets of the three-way pipe respectively, the outlet of the three-way pipe is connected to the inlet connected to the inner membrane absorption tower, and the inner membrane absorption tower The outlet is connected to the jet vacuum pump;

[0020] (2) Turn on the jet vacuum pump and spray the inner membrane absorption tower with clean water. When the temperature of the sprayed fluoride wastewater reaches 60°C and the acidity reaches 4N, stop the spraying of the inner membrane absorption tower;

[0021...

Embodiment 3

[0023] [Example 3] A method for treating fluoride waste water and waste gas. The fluoride waste gas is treated into fluoride waste water, and then the waste gas generated in the process of treating fluoride waste water is treated into waste water, and the process is circulated until the fluoride is completely absorbed. Include the following steps:

[0024] (1) Connect the feeding port and gas outlet on the cover of the reaction kettle that produces fluoride waste gas to the two inlets of the three-way pipe respectively, the outlet of the three-way pipe is connected to the inlet connected to the inner membrane absorption tower, and the inner membrane absorption tower The outlet is connected to the jet vacuum pump;

[0025] (2) Turn on the jet vacuum pump and spray the inner membrane absorption tower with clean water. When the temperature of the sprayed fluoride wastewater reaches 55°C and the acidity reaches 4N, stop the spraying of the inner membrane absorption tower;

[0026...

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PUM

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Abstract

The invention discloses a method for treating fluoride waste water and gas. Fluoride waste gas is treated so as to form fluoride waste water, and waste gas which is generated in the process of fluoride waste water treatment is treated so as to form waste water, and circular treatment is performed until fluoride is completely absorbed. The method comprises the following steps of: opening a spray vacuum pump and spraying by using clear water; fully absorbing fluoride, and stopping after fluoride waste water is formed; replacing clear water, opening the spray vacuum pump, and continuously spraying; and adding calcium hydroxide into a reaction kettle and reacting calcium hydroxide and fluoride waste water, and separating a solution which is subjected to reaction and filtering. Fluorinion in the fluoride waste water is removed by calcium hydroxide, and fluoride waste gas generated in the treatment process is absorbed by an absorption tower and then is converted into the fluoride waste water; circular treatment is performed; and the residual amount of fluorinion after treatment is effectively reduced, the industrial emission standard is reached, a treatment cycle is short, efficiency is high, cost is low and secondary pollution cannot be caused easily.

Description

technical field [0001] The invention relates to a method for treating fluoride waste water and waste gas. Background technique [0002] In the industrial production process of glass production, electroplating production, non-ferrous metal smelting and semiconductor and other electronic components, a large amount of fluoride will be produced, and fluoride ions will cause serious pollution to the environment, among which fluorine pollution in the water environment is the most serious. Therefore, the research on the treatment technology of fluorine-containing wastewater has always been an important topic in the fields of environmental protection and chemical production. [0003] The existing fluorine-containing wastewater treatment methods mainly include lime neutralization precipitation method and coagulation precipitation method: lime neutralization precipitation method is the most commonly used method for fluorine-containing wastewater treatment, especially popular in high-c...

Claims

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Application Information

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IPC IPC(8): B01D53/14C02F1/58C02F101/14
Inventor 明添明智明雯明实
Owner SICHUAN MINGJING PHOTOELECTRIC TECH