Production method for preparing high-efficiency fluorine removal agent by using waste hydrochloric acid and aluminum-containing sludge and application

A technology of waste hydrochloric acid and fluoride removal agent, which is applied in chemical instruments and methods, water/sludge/sewage treatment, water/sewage treatment, etc. and economic value, reducing environmental harm, reducing the effect of waste discharge

Active Publication Date: 2014-06-04
CHANGZHOU WUJIN YOUBANG WATER PURIFICATION MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the shortcomings of the existing calcium salt defluoridation agent such as slow settling, difficulty in discharge, and high cost; large dosage of aluminum salt flocculation method, unstable water quality, etc., combined with the environmental protection of "waste utilization, turning waste into treasure" advocated by the state The concept provides a production method and application of using waste hydrochloric acid and aluminum-containing sludge to prepare high-efficiency defluoridation agent; this method overcomes the defects of traditional production technology and solves the problems of high raw material cost, control of reaction speed and stable product Performance, harmless gas treatment during the reaction process, fast settling speed and other problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method and application of using waste hydrochloric acid and aluminum-containing sludge to prepare a high-efficiency defluoridation agent, the steps are as follows:

[0026] (1) Add the absorbed water in the tail gas absorption tower of the upper kettle into the reaction kettle, about 500 kg each time, taking 10 tons of products as an example, and start the tail gas absorption device.

[0027] (2) 3000kg of limestone with 40% calcium oxide content is added in batches to the reaction kettle, mixed with the water body in the kettle, the material is added from the feed port, and the metering pump is used to adjust the flow rate to 30L / min and pump the concentration of 30%. Produce 5600kg of hydrochloric acid, complete within 3 hours, keep stirring, and add 10kg of defoamer to eliminate bubbles, the neutralization reaction temperature rises to about 65°C, and the content of adding while hot is 10% (based on Al 2 o 3 ) of aluminum slag 1200kg, reacted for 1 hour, adjusted ...

Embodiment 2

[0029] A method and application of using waste hydrochloric acid and aluminum-containing sludge to prepare a high-efficiency defluoridation agent, the steps are as follows:

[0030] (1) Add the absorbed water in the tail gas absorption tower of the upper kettle into the reaction kettle, about 500 kg each time, taking 10 tons of products as an example, and start the tail gas absorption device.

[0031] (2) Qualified calcium carbonate 2000kg is added in the reactor in batches, mixed with the water body in the kettle, the material is added from the feeding port, and the flow rate adjusted by the metering pump is 30L / min and the pumping concentration is 5600kg of industrial by-product hydrochloric acid of 30%. , complete within 3 hours, keep stirring, and add 10kg defoamer to eliminate bubbles, the neutralization reaction temperature rises to about 65 ° C, and the content of adding while hot is 10% (based on Al 2 o 3 ) of aluminum slag 1200kg, reacted for 1 hour, adjusted the pH ...

Embodiment 3

[0033] A method and application of using waste hydrochloric acid and aluminum-containing sludge to prepare a high-efficiency defluoridation agent, the steps are as follows:

[0034] (1) Add the absorbed water in the tail gas absorption tower of the upper kettle into the reaction kettle, about 500 kg each time, taking 10 tons of products as an example, and start the tail gas absorption device.

[0035] (2) Qualified calcium hydroxide 1500kg is added in batches to the reaction kettle, mixed with the water body in the kettle, the material is added from the feed port, and the flow rate adjusted by the metering pump is 30L / min, and the pumping concentration is 30% industrial by-product hydrochloric acid 5600kg, complete within 3 hours, keep stirring, and add 10kg defoamer to eliminate air bubbles, neutralization reaction temperature rises to about 65°C, add content of 10% (based on Al 2 o 3 ) of aluminum slag 1200kg, reacted for 1 hour, adjusted the pH to about 5.0 with calcium hy...

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Abstract

The invention relates to a production method of a liquid fluorine removal agent, and particularly relates to a novel method for preparing high-efficiency fluorine removal agent by using waste hydrochloric acid and aluminum-containing sludge, belonging to the technical field of environment chemical engineering and wastewater treatment. The production method is characterized by comprising the steps: by using an industrial byproduct of the waste hydrochloric acid, calcium carbonate and an aluminum product industry of the aluminum-containing sludge as main raw materials, reacting according to a certain ration, adjusting pH by using calcium hydroxide, and polymerizing at a normal pressure after adding a stabilizing agent to obtain a colorless to faint yellow liquid. According to the production method, a production waste is treated in a hazard-free manner and is recycled, and is changed into valuable; zero emission is achieved in a production process, and the obtained product is stable in quality; the production method is simple in equipment, low in production cost and easy to popularize; through production testing, the production cost can be effectively lowered, so that the industrial waste acid and aluminum-containing solid waste are comprehensively utilized, and the economic and social benefits are remarkable.

Description

technical field [0001] The invention relates to a preparation method and application of a high-efficiency defluorinating agent. In particular, it relates to a preparation method for preparing a fluoride-removing agent by using industrial waste acid and aluminum-containing solid waste and its application in the treatment of fluorine-containing wastewater, and belongs to the technical fields of environmental chemical industry, wastewater treatment and the like. Background technique [0002] In recent years, with the continuous improvement of the degree of industrialization, the environmental pollution caused by industrial wastewater has attracted more and more attention. Fluorine is one of the trace elements needed by the human body to maintain normal physiological activities. Excessive or insufficient fluorine intake by the human body from the outside world will affect health. Long-term drinking of low-fluoride water is prone to dental caries, while long-term drinking of hig...

Claims

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Application Information

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IPC IPC(8): C02F1/52C02F1/58
Inventor 李光辉王桂玉赵志萍
Owner CHANGZHOU WUJIN YOUBANG WATER PURIFICATION MATERIALS
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