Carbide residue and waste water treating process

A treatment method, the technology of calcium carbide slag, is applied in the directions of multi-stage water/sewage treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. Sewage, can only deal with problems such as carbide slag, etc., to achieve obvious economic benefits, reduce the amount of dissolution, and low production costs

Inactive Publication Date: 2007-06-27
梁永洪 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the lack of suitable supporting raw materials around many enterprises, there are still many problems in the treatment of calcium carbide slag. When dealing with fine carbide slag, coarse particles have to be discharged into the environment, so the treatment is not thorough enough. In addition, all the treatment methods introduced in the current literature can only deal with carbide slag, and cannot treat the sewage discharged with carbide slag at the same time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1. Pump the calcium carbide slag material discharged from the acetylene production workshop to the sedimentation tank with a mud pump, and let it stand still. After standing still, separate the sediment, use water for standby, pump the sediment to a wet ball mill, and grind it into particles smaller than 300 mesh Slurry, sent to press filtration for the slurry after ball milling, and then washing the filter cake in the filter press to further remove soluble impurities, and collecting the water from the above first step of precipitation, press filtration and water washing After adding desulfurizer or purifying agent, return to the acetylene production workshop, as the production water for the reaction of calcium carbide and water into acetylene, and finally add water to the filter cake, add 6-7 kg of water per kg of filter cake, and store it in a storage tank for treatment Slaked lime for acid wastewater treatment in sulfuric acid plants, printing and dyeing pl...

Embodiment 2

[0027] Embodiment 2. Pump the calcium carbide slag material discharged from the acetylene production workshop to the sedimentation tank with a mud pump, and let it stand still. After standing still, separate the sediment and reserve the water, pump the sediment to a wet ball mill, and grind it into particles smaller than 300 mesh Slurry, sent to press filtration for the slurry after ball milling, and then washing the filter cake in the filter press to further remove soluble impurities, and collecting the water from the above first step of precipitation, press filtration and water washing , after adding desulfurizer or purifying agent, return to the acetylene production workshop, as the production water for the reaction of calcium carbide and water into acetylene, and finally add water to the filter cake, add 2-5 kg ​​of water per kg of filter cake, put it in the storage tank for storage, and use it as a building Lime plaster.

Embodiment 3

[0028] Embodiment 3. Pump the calcium carbide slag material discharged from the acetylene production workshop to the sedimentation tank with a mud pump, let it stand still, separate the sediment after standing, and use the water for backup, pump the sediment to a wet ball mill, and grind it into particles smaller than 300 mesh Slurry, sent to press filtration for the slurry after ball milling, and then washing the filter cake in the filter press to further remove soluble impurities, and collecting the water from the above first step of precipitation, press filtration and water washing After adding desulfurizer or purifying agent, return to the acetylene production workshop, as the production water for the reaction of calcium carbide and water into acetylene, add a small amount of water to the filter cake, and introduce carbon dioxide to produce high-quality calcium carbonate, which has good fineness. It can be used in many occasions, and the cost is lower than direct rough grin...

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PUM

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Abstract

The carbide residue and waste water treating process includes the following steps: pumping carbide residue with a slurry pump from acetylene producing shop to a settler, standing and separating water and precipitate; pumping the precipitate to wet ball mill and milling into 300 mesh below slurry; pressure filtering the slurry, water washing the filter cake to eliminate soluble impurity and collecting water; treating water through adding desulfurizing agent and returning to the acetylene producing shop for reuse; and pulping the filter cake to form slurry, which may be used as slaked lime for treating acid industrial waste water or sulfur containing boiler fume, building lime paste or material for producing high quality calcium carbonate.

Description

technical field [0001] The invention relates to a treatment method for calcium carbide slag and waste water in the production process of acetylene gas, belonging to an environmental protection project for comprehensive utilization of calcium carbide acetylene production plants. Background technique [0002] Carbide slag is a by-product of acetylene produced by hydrolysis of calcium carbide. It is an industrial waste. The main reaction formula of hydrolysis is: CaC 2 +2H 2 O=C 2 h 2 +Ca(OH) 2 , the main chemical composition of carbide slag is Ca(OH) 2 , as can be seen from the reaction equation, producing one equivalent of C 2 h 2 It is necessary to produce the same equivalent of calcium carbide slag. Generally, the solid content of the calcium carbide slurry discharged from the wet generator is 5% to 15%, the water content is 85% to 95%, and it is in a liquid state. After being treated by the clarifier , can become a thick substance with a water content of 60% to 70%. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/52C01F11/02
Inventor 梁永洪龙庆国
Owner 梁永洪
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