Reuse technology of oil refining, chemical catalyst production waste water

A technology for producing wastewater and catalysts, which is used in biological water/sewage treatment, chemical instruments and methods, and multi-stage water/sewage treatment. cost, solving technical problems, and protecting the environment

Inactive Publication Date: 2007-04-18
BEIJING ZHONG TIAN YUAN ENVIRONMENTAL ENG
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  • Abstract
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Problems solved by technology

[0007] Although there are many treatment methods for high-concentration ammonia-nitrogen wastewater, there is currently no one that can take into account the aspects of simple process, low investment, mature technology, convenient control, and no secondary pollution.
According to the characteristics of high salt content and high ammonia nitrogen concentration in the production wastewater of catalyst factories, no single technology can meet the dual requirements of technical and economic indicators
Existing technologies have high operating costs or cannot meet environmental protection emission requirements

Method used

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  • Reuse technology of oil refining, chemical catalyst production waste water

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Embodiment

[0033]Ammonia nitrogen wastewater is pumped into the reaction tank, and chemicals A and B are added to the reaction tank to form large particle flocs of silicon, aluminum and suspended solids, and then enter the degumming and suspended solids removal device. The content of silicon and aluminum in the effluent is less than 10ppm, suspended The clean water with less than 50ppm of solids enters the primary reverse osmosis system, and the waste residue formed by colloids and suspended solids is transported to landfill, cement factory or brick factory; the clean water treated by the primary reverse osmosis system is used as the feed water of the secondary reverse osmosis system. The salt content of the clean water in the secondary reverse osmosis system is below 1ppm, the ammonia nitrogen is 0, and the turbidity is 0. The clean water can be directly reused or discharged, and the concentrated water of the secondary reverse osmosis system is returned to the water inlet tank of the prim...

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Abstract

The present invention relates to a waste water treatment, recovery and reutilization process, in particular it relates to a recovery and reutilization process of waste water produced by oil-refining and chemical catalyst production. Said method is characterized by including the following several main steps: firstly, removing silica gel or silicon oxide, sodium salt and suspension which are harmful to production from the waste water, recovering valuable ammonia and clean water from the waste water and reutilizing them in the production process. Besides, said invention also provides the concrete measures of the above-mentioned every step.

Description

technical field [0001] The invention relates to a waste water treatment and reuse process, in particular to a waste water reuse process for oil refining and chemical catalyst production. Background technique [0002] Oil refining and chemical catalysts are mostly silicon and aluminum compounds. In the preparation process, water glass, aluminum sulfate, aluminum oxide, aluminum silicate, etc. are used as raw materials to form gels and crystallize molecular sieves through chemical reactions, and then undergo ammonium exchange or rare earth Exchange, then wash out the sodium ions with chemical water, and finally synthesize the finished or semi-finished catalyst by drying, roasting, activating, etc. During the exchange and washing process of the production process, a large amount of ammonia nitrogen wastewater and high-salt wastewater are generated. Catalyst production wastewater is divided into three types, the first is low-ammonia or no-ammonia wastewater, including NaY collo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F1/52C02F1/44C02F3/00
Inventor 谢志成刘凯中张轶群
Owner BEIJING ZHONG TIAN YUAN ENVIRONMENTAL ENG
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