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Water-film integrated processing process of high-salt-content wastewater generated by hydrazine hydrate production using ketazine method

A technology of ketazine method and treatment process, which is applied in the field of high-salt wastewater membrane integrated treatment process, which can solve the problems of high sodium chloride concentration and difficult treatment of high-salt organic wastewater, and achieves advanced technology and stable and reliable effect , the effect of simple operation

Active Publication Date: 2016-08-10
JIANGSU SOPO GRP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the ketazine method will produce wastewater with a high salt content and a high concentration of sodium chloride. In addition, the wastewater also contains organic substances such as acetone and acetonazine, and the COD value is also relatively high, which is difficult to treat. Saline organic wastewater

Method used

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  • Water-film integrated processing process of high-salt-content wastewater generated by hydrazine hydrate production using ketazine method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] For conductivity of 90000μs / cm, COD Cr Adsorption pretreatment is performed for 2500mg / L hydrazine hydrate wastewater. The adsorbent used is activated carbon powder, the dosage is 0.5wt.%, and the microfiltration pretreatment is carried out after 20min of adsorption. Hollow fiber membrane with a membrane pore size of 0.03μm Filtered under the condition of a transmembrane pressure difference of 0.3MPa, the conductivity of the product water is 80,000μs / cm, COD Cr 1700mg / L; the permeate pretreated by microfiltration is transported to the nanofiltration membrane filtration system through a high-pressure pump, and the ceramic alumina hollow fiber nanofiltration membrane with an average pore size of 5nm is used for concentration treatment. The transmembrane pressure difference is Filtered under the condition of 0.6MPa, the conductivity of the fresh water on the permeate side is 75000μs / cm, COD Cr 500mg / L; the water produced on the permeation side of nanofiltration enters into th...

Embodiment 2

[0022] For conductivity of 300000μs / cm, COD Cr Adsorption pretreatment for 4500mg / L hydrazine hydrate wastewater. The adsorbent used is activated alumina, the dosage is 3wt.%, and the microfiltration pretreatment is performed after 50min of adsorption. A tubular membrane with a membrane pore size of 5μm Filtered under the condition of membrane pressure difference of 0.1MPa, the conductivity of the product water is 290,000μs / cm, COD Cr 2800mg / L; the permeate pretreated by microfiltration is transported to the nanofiltration membrane filtration system through a high-pressure pump, and the sulfonated polyphenylsulfone roll membrane with an average pore size of 1nm is used for concentration treatment. The transmembrane pressure difference is Filtered under the condition of 0.8MPa, the conductivity of the fresh water on the permeate side is 270,000μs / cm, COD Cr It is 800mg / L; the water produced on the permeation side of nanofiltration enters into the ozone catalytic oxidation treatmen...

Embodiment 3

[0024] For conductivity of 190000μs / cm, COD Cr Adsorption pretreatment was performed for 3050mg / L hydrazine hydrate wastewater. The adsorbent used was inorganic silica gel, the dosage was 0.5wt.%, and the microfiltration pretreatment was carried out after 40min of adsorption. A tubular membrane with a membrane pore size of 3μm Filtered under the condition of membrane pressure difference of 0.2MPa, the conductivity of the product water is 170,000μs / cm, COD Cr 2570mg / L; the permeate after microfiltration pretreatment is transported to the nanofiltration membrane filtration system through a high-pressure pump, and the sulfonated polyethersulfone hollow fiber membrane with an average pore size of 2nm is used for concentration treatment. The transmembrane pressure difference is Filtered under the condition of 0.5MPa, the conductivity of the fresh water on the permeate side is 155200μs / cm, COD Cr It is 629mg / L; the water produced on the permeation side of nanofiltration enters into the...

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Abstract

The invention relates to water-film integrated processing process of high-salt-content wastewater generated by hydrazine hydrate production using a ketazine method. The water-film integrated processing process includes: performing microfiltration on the high-salt-content wastewater generated by the hydrazine hydrate production using the ketazine method after absorption, allowing the clean water after the microfiltration to enter a nano-filtration process, allowing the penetrating fluid after the nano-filtration to enter an ozone catalytic oxidization system, allowing thick water to circulate and enter absorption treatment, conveying the wastewater after the ozone catalytic oxidization to air stripping treatment, and then removing the salt water and refining. The water-film integrated processing process has the advantages the water-film integrated processing technology is used, organic matter and inorganic salt are separated effectively, and the process is advanced, simple to operate, stable and reliable in effect, and the like.

Description

Technical field [0001] The invention belongs to the field of environmental protection water treatment, and relates to a membrane integrated treatment process for high-salt wastewater for preparing hydrazine hydrate by a ketazine method. Background technique [0002] Hydrazine hydrate, also known as hydrazine hydrate, is an important fine chemical raw material. Hydrazine hydrate can be used to synthesize a variety of foaming agents, cleaning agents, as well as medicines, herbicides, rubber additives, rocket fuel and other fields. The synthetic methods of hydrazine hydrate mainly include the Raschig method, the urea method, the ketazine method and the hydrogen peroxide method. The Raschig method uses ammonia as the nitrogen source and uses sodium hypochlorite to oxidize ammonia gas to produce hydrazine hydrate. Because this method requires excessive use of ammonia, it is necessary to add a recovery device and also produce a large amount of sodium chloride and ammonium chloride and...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/28C02F1/44C02F1/20C02F1/78C02F101/30
CPCC02F9/00C02F1/725C02F1/78C02F1/442C02F1/444C02F2101/30C02F1/281C02F1/283C02F1/20
Inventor 许宝华李卫星朱桂生沈建良刘玲王文凤黄诚唐丽
Owner JIANGSU SOPO GRP