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Sustained-release material for treating acid wastewater and preparation method of sustained-release material

A slow-release material and acid wastewater technology, which is applied in the field of wastewater treatment, can solve problems such as pollution, acidity reduction, and uncontrollability, and achieve the effects of simple preparation process, reduced treatment cost, and extended service life

Inactive Publication Date: 2014-12-10
贵州省工业固体废弃物综合利用(建材)工程技术研究中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And the current method for the treatment of acidic wastewater is mainly to use the principle of acid-base neutralization, using lime directly into it, so that the acidity in the wastewater is neutralized, and then reduce the acidity; When the lime is first digested in the water, insoluble calcium hydroxide is produced; the calcium hydroxide reacts with the acid, which makes the treatment cycle of acidic wastewater long; and it is often necessary to put in too much lime, which leads to waste water treatment. The cost is high; at the same time, the amount of lime input is difficult to control, which makes it difficult to control the pH value of the water, resulting in an unsatisfactory and uncontrollable effect on the acidity treatment of wastewater, and after the lime reacts with water, it becomes insoluble calcium hydroxide, which is The water flow takes it away; this not only causes waste but also produces new pollution; direct input of lime requires manual continuous feeding, and consumes a lot of manpower

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A slow-release material for treating acidic wastewater. The material is designed in a double-layer structure. It is specifically composed of a shell made of cement on the outside and a core made of alkaline material on the inside. The thickness of the shell is 1mm.

[0024] The alkaline material is slaked lime.

[0025] The cement is ordinary Portland cement.

[0026] Its specific preparation method comprises the following steps:

[0027] (1) Core making: Put the alkaline material in a crusher and crush it until the particle size is less than 1mm, then put the crushed alkaline material in a ball forming machine, spray water to prepare alkaline balls with a particle size of 1cm , that is, to obtain the core, to be used;

[0028] (2) Shelling: the core prepared in step 1) is placed in a ball forming machine with cement powder added in advance, so that the outer layer of the core is wrapped with a cement shell with a thickness of 1 mm, and then taken out and naturally cu...

Embodiment 2

[0031] A slow-release material for treating acidic wastewater. The material is designed in a double-layer structure. It is specifically composed of a shell made of cement on the outside and a core made of alkaline material on the inside. The thickness of the shell is 5mm.

[0032] The alkaline material is carbide slag containing 50% hydrated lime.

[0033] The particle size of the alkaline material is less than 1mm.

[0034] The cement is composite Portland cement.

[0035] Its specific preparation method comprises the following steps:

[0036] (1) Core making: Put the alkaline material in a crusher and crush it until the particle size is less than 1mm, then put the crushed alkaline material in a ball forming machine, spray water to prepare alkaline balls with a particle size of 5cm , that is, to obtain the core, to be used;

[0037] (2) Shelling: the core prepared in step 1) is placed in a ball forming machine with cement powder added in advance, so that the outer layer of...

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Abstract

The invention relates to the technical field of wastewater treatment and particularly relates to a sustained-release material for treating acid wastewater and a preparation method of the sustained-release material. The preparation method comprises the following steps: breaking and crushing an alkaline material, and manufacturing the broken and crushed material into a spherical shape; covering a housing layer on the outer layer of the spherical shape, and processing the housing to form holes. By adopting the preparation method, a release rate of the alkaline material in the sustained-release material is controlled, the service life of the sustained-release material is prolonged, and the acid wastewater treatment cost is lowered. The preparation method of the sustained-release material is simple, and the sustained-release material is manufactured into combination of the housing and a core during manufacturing, so that the core is protected by virtue of the housing, the release rate of the alkaline material is controlled, the sustained-release effect of the alkali is strengthened, the service life of the sustained-release material is prolonged, and the acid wastewater treatment cost is lowered. Moreover, the sustained-release effect is not completely dissolved in water, and easy to recycle.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a slow-release material for treating acid wastewater and a preparation method thereof. Background technique [0002] In industrial production, with the increase of output, a large amount of acidic wastewater will be discharged, such as coal mine production; these wastewaters are acidic and discharged on the soil or surface, seriously polluting surface and groundwater resources. And the current method for the treatment of acidic wastewater is mainly to use the principle of acid-base neutralization, using lime directly into it, so that the acidity in the wastewater is neutralized, and then reduce the acidity; When the lime is first digested in the water, insoluble calcium hydroxide is produced; the calcium hydroxide reacts with the acid, which makes the treatment cycle of acidic wastewater long; and it is often necessary to put in too much lime, which leads to waste wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/66
Inventor 贺深阳彭建军宋美刘立柱刘恒波贾韶辉王勇贺勇万军
Owner 贵州省工业固体废弃物综合利用(建材)工程技术研究中心