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Method for synthesizing pH regulator by using fly ash

A technology of fly ash and conditioner, applied in the field of wastewater treatment, can solve the problems of low safety and high cost of bulk materials, and achieve the effect of high safety and cost reduction

Pending Publication Date: 2021-11-23
国能浙能宁东发电有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] This application provides a method for synthesizing a ph regulator with fly ash, which solves the problems of high cost of bulk materials and low safety in the traditional wastewater ph value adjustment method in the prior art

Method used

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  • Method for synthesizing pH regulator by using fly ash

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Experimental program
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Effect test

Embodiment 1

[0028] According to the mass ratio CaCO3: fly ash = 1:10, put 1g CaCO3 and 10g fly ash into an agate mortar for grinding and mixing, put them into a crucible for roasting, cool down to room temperature, grind again, and add to the roasted product Stir with high-purity water, put it into a reaction kettle for aging, crystallize at 180°C, cool down to room temperature, and add both solid and liquid crystallization products into the wastewater at the same time. The initial pH of the wastewater was 3.3, the pH value was 9.8 after adding the synthetic pH regulator, and the pH value was 7.6 after standing for 3 days. At this point, filter the waste water with filter paper to separate the synthesized ph value adjuster solids.

Embodiment 2

[0030] According to the mass ratio CaCO3: fly ash = 3:7, put 3g CaCO3 and 7g fly ash into an agate mortar, grind and mix them, put them into a crucible and roast them, cool down to room temperature, grind again, and add to the roasted product Stir with high-purity water, put it into a reaction kettle for aging, crystallize at 180°C, cool down to room temperature, and add both solid and liquid crystallization products into the wastewater at the same time. The initial pH of the wastewater was 3.4, the pH value was 10.3 after adding the synthetic pH regulator, and the pH value was 7.8 after 3 days of storage. At this point, filter the waste water with filter paper to separate the synthesized ph value adjuster solids.

Embodiment 3

[0032] According to the mass ratio CaCO3: fly ash = 3:7, put 3g CaCO3 and 7g fly ash into an agate mortar, grind and mix them, put them into a crucible and roast them, cool down to room temperature, grind again, and add to the roasted product Stir with high-purity water, put it into a reaction kettle for aging, crystallize at 180°C, cool down to room temperature, and add both solid and liquid crystallization products into the wastewater at the same time. The initial pH of the waste water was 9.8, the pH value was 10.8 after adding the synthetic pH regulator, and the pH value was 8.1 after 3 days of storage. At this point, filter the waste water with filter paper to separate the synthesized ph value adjuster solids.

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Abstract

The invention discloses a method for synthesizing a pH regulator by using fly ash. The method comprises the following steps: fully grinding and mixing fly ash and calcium carbonate, placing the mixture in a crucible, and roasting in a muffle furnace; then adding deionized water into the roasted product, stirring for 0.5-5 hours at the stirring speed of 450-880 r / min, putting the stirred mixture into a reaction kettle, and performing static crystallization; and finally, adding the crystallization product into the wastewater to adjust the pH value of the wastewater, wherein the ratio of the addition amount of the crystallization product to the wastewater is 1: (50-200). Therefore, according to the method, the solid wastes of the power plant are directly synthesized into the pH regulator for regulating the pH value of the wastewater, so that the purpose of treating wastes with wastes can be achieved, bulk materials do not need to be purchased, the cost can be reduced, and the safety is relatively high; and the pH regulator is bidirectional, and the purpose of adjusting the pH value of the wastewater in both acidic waste liquid and alkaline waste liquid can be achieved through the pH regulator.

Description

technical field [0001] The present application relates to the field of wastewater treatment, in particular to a method for synthesizing a pH regulator with fly ash. Background technique [0002] The main component of fly ash is SiO 2 and Al 2 o 3 , a large amount of active Si and Al can be obtained through pretreatment. These active Si and Al can be used to synthesize molecular sieves, and then the acidic sites inside the synthesized molecular sieves can be combined with some ions in wastewater. After these acidic sites combine with ions in wastewater It may gradually release hydrogen ions or hydroxide ions, and then achieve the purpose of adjusting the pH value. [0003] In the prior art, adjusting the pH value of wastewater is mainly to add industrial hydrochloric acid or industrial sodium hydroxide to the wastewater. However, industrial acids and alkalis not only require a certain amount of bulk material costs, but also have certain dangers in the storage and use of i...

Claims

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Application Information

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IPC IPC(8): C02F1/66
CPCC02F1/66Y02W30/91
Inventor 吴鹏刘敏韩华锋郭滔殷延文
Owner 国能浙能宁东发电有限公司
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