Method for removing sulfur and phosphorus from carbide slag

A technology of calcium carbide slag and sulfur and phosphorus, which is applied in the chemical industry, can solve the problems of high calcium carbide slag sulfur and phosphorus and limit the application of carbide slag, and achieve the effects of reducing pollution, reducing sulfur and phosphorus content, and improving applicability

Inactive Publication Date: 2019-09-17
CHENGDU HUARONG CHEM CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the release of PH3, H2S and other gases during the production of acetylene from PVC, they are not completely oxidized by hypochlorous acid during the purification of acetylene gas, resulting in the presence of sulfite, phosphite, and hypophosphite in waste sodium hypochlorite.
Waste sodium hypochlorite liquid is reused in the acetylene generator, resulting in excessive sulfur and phosphorus in calcium carbide slag, which makes the treated water quality high in sulfur and phosphorus when used by water treatment users, thus limiting the application of calcium carbide slag in water treatment

Method used

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  • Method for removing sulfur and phosphorus from carbide slag

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Embodiment Construction

[0020] The following will be combined with figure 1 The present invention is described in detail, and the technical solutions in the embodiments of the present invention are clearly and completely described. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0021] Such as figure 1 Shown, the method for removing sulfur and phosphorus with carbide slag comprises the following steps during specific implementation,

[0022] Step 1: waste sodium hypochlorite solution collection and pH adjustment: through the waste sodium hypochlorite solution delivery pump A2, the waste sodium hypochlorite solution from the acetylene cleaning tower 1 is transported to the waste sodium hypochlorite solution storage tank 3, and...

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Abstract

The invention discloses a method for removing sulfur and phosphorus from carbide slag, which comprises a waste sodium hypochlorite solution collection step, an oxidation pretreatment step, a treatment liquid detection step, a precipitation reaction step and a slag slurry and clear liquid treatment step. The method can effectively reduce the content of the sulfur and phosphorus in the carbide slag, improve the applicability in water treatment and reduce the environmental pressure.

Description

technical field [0001] The invention relates to the field of chemical engineering, specifically the technical field of sulfur and phosphorus, in particular to a method for removing sulfur and phosphorus from a waste sodium hypochlorite solution. Background technique [0002] Calcium carbide slag is the waste slag produced in the calcium carbide process PVC production process. The main component is calcium hydroxide. Every ton of PVC produced will produce about 1.7 tons of calcium carbide dry slag. At present, a large amount of carbide slag is used to produce carbide slag cement, or exported as a neutralizer for alkaline water treatment. However, due to the release of PH3, H2S and other gases during the production of acetylene from PVC, they are not completely oxidized by hypochlorous acid during the purification of acetylene gas, resulting in the presence of sulfite, phosphite, and hypophosphite in waste sodium hypochlorite. The waste sodium hypochlorite solution is reused ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F11/122
CPCC02F1/58C02F1/66C02F1/766C02F9/00C02F11/122C02F2001/007C02F2101/101C02F2101/105
Inventor 罗小容张天兰王涛文荣斌
Owner CHENGDU HUARONG CHEM CO LTD
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