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Alkaline neutralizer for stainless steel acid pickling wastewater

A technology for pickling wastewater and stainless steel, which is applied in the field of industrial waste acid and wastewater treatment in the iron and steel and metallurgical industries. It can solve the problems of incomplete precipitation of metal hydroxides, large amount of sludge, and high sludge disposal costs, etc., and achieves convenient preparation. , simple raw materials, low cost effect

Inactive Publication Date: 2017-08-25
李朋国
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Problems solved by technology

The disadvantage is that in the range of pH = 6-9, some metal hydroxides are not completely precipitated, and the amount of sludge generated by water treatment is relatively large. The sediment contains a large amount of heavy metals. It needs to be managed as industrial hazardous waste, and the cost of sludge disposal is high.

Method used

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Embodiment Construction

[0017] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0018] The invention provides a technical solution: an alkaline neutralizer for stainless steel pickling wastewater, which is composed of the following raw materials in parts by weight: 8-12 parts by weight of cyclohexylamine, 3-4 parts by weight of methanol, and 5-8 parts by weight of simethicone The parts by weight include 1-4 parts by weight of polyethylene polyamine, 35-47 parts by weight of lime, and 25-48 parts by weight of solvent.

[0019] Cyclohexylamine is obtained by catalytic hydrogenation of aniline, lime is a kind of quicklime powder, and the solvent is diesel or kerosene.

[0020] Crude oil, heavy oil or light oil is used as raw material, through gas-making purification transformation, carbon monoxide and hydrogen are removed, and a...

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Abstract

The invention provides an alkaline neutralizer for stainless steel acid pickling wastewater. The alkaline neutralizer is prepared from the following raw materials in parts by weight: 8-12 parts of cyclohexylamine, 3-4 parts of methanol, 5-8 parts of dimethicone, 1-4 parts of polyethylene polyamine, 35-47 parts of lime and 25-48 parts of a solvent. Compared with the prior art, the alkaline neutralizer has the following beneficial effects: the pH value of water can be effectively controlled, and an acidic medium can be effectively neutralized; meanwhile, raw materials are simple, preparation is convenient, cost is low, and the alkaline neutralizer can be applied to treatment of most waste acid solutions.

Description

technical field [0001] The invention is an alkaline neutralizer for stainless steel pickling wastewater, which belongs to the field of industrial waste acid and wastewater treatment in the iron and steel and metallurgical industries. Background technique [0002] Stainless steel can be roughly classified according to its use, chemical composition and metallographic structure. Austenitic stainless steels are basically composed of 18% chromium-8% nickel, and the addition of each element changes differently to develop stainless steels for various purposes. [0003] Stainless steel is widely used in petroleum, chemical industry, power, nuclear engineering, aerospace, medical machinery, light industrial products, personal residential decoration, and high-end hotels because of its many advantages such as acid corrosion resistance, good heat resistance, and high temperature oxidation resistance. facilities etc. During the forming and heat treatment process of stainless steel, a l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/66C02F103/16
CPCC02F1/66C02F2103/16
Inventor 李朋国
Owner 李朋国
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