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Membrane integrated treatment process for high salinity wastewater produced by ketazine method to hydrazine hydrate

A technology of ketazine method and treatment process, which is applied in the field of high-salt wastewater membrane integrated treatment process, can solve the problems of difficult-to-treat high-salt organic wastewater and high sodium chloride concentration, and achieve stable and reliable effects, advanced technology, The effect of low energy consumption

Active Publication Date: 2019-04-23
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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  • Membrane integrated treatment process for high salinity wastewater produced by ketazine method to hydrazine hydrate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The conductivity is 90000μs / cm, COD Cr Adsorption pretreatment is carried out for 2500mg / L hydrazine hydrate wastewater, the adsorbent used is activated carbon powder, the dosage is 0.5wt.%, microfiltration pretreatment is carried out after adsorption for 20min, and a hollow fiber membrane with a membrane pore size of 0.03μm is used in the Filtration under the condition of transmembrane pressure difference of 0.3MPa, the conductivity of the product water is 80000μs / cm, COD Cr The permeate after microfiltration pretreatment 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 Filter under the condition of 0.6MPa, the conductivity of the permeate side fresh water is 75000μs / cm, COD Cr 500mg / L; the water produced from the permeation side of the nanofiltration ent...

Embodiment 2

[0022] The conductivity is 300000μs / cm, COD Cr Adsorption pretreatment was carried out for 4500mg / L hydrazine hydrate wastewater. The adsorbent used was activated alumina, and the dosage was 3wt.%. Microfiltration pretreatment was carried out after 50 minutes of adsorption. Filtration under the condition of membrane pressure difference of 0.1MPa, the conductivity of the product water is 290000μs / cm, COD Cr The permeate after microfiltration pretreatment is transported to the nanofiltration membrane filtration system through a high-pressure pump, and the sulfonated polyphenylsulfone roll-type membrane with an average pore size of 1nm is used for concentration treatment. The transmembrane pressure difference is Filtration is carried out under the condition of 0.8MPa, the conductivity of the permeate side fresh water is 270000μs / cm, COD Cr 800mg / L; the permeated water from the nanofiltration side enters the ozone catalytic oxidation treatment, the catalyst used is honeycomb alum...

Embodiment 3

[0024] The relative conductivity is 190000μs / cm, COD Cr Adsorption pretreatment was carried out for 3050mg / L hydrazine hydrate wastewater. The adsorbent used was inorganic silica gel, and the dosage was 0.5wt.%. Filtration under the condition of membrane pressure difference of 0.2MPa, the conductivity of the product water is 170000μs / cm, COD Cr It is 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, and the transmembrane pressure difference is Filtration is carried out under the condition of 0.5MPa, the conductivity of the permeate side fresh water is 155200μs / cm, COD Cr 629mg / L; the permeate side of the nanofiltration enters the ozone catalytic oxidation treatment, the catalyst used is lanthanum oxide supported on honeycomb alumina, the dosage is 5w...

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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 an integrated treatment process of high-salt wastewater membrane method 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 and cleaning agents, and can also be used as drugs, herbicides, rubber additives, rocket fuels and other fields. The synthetic methods of hydrazine hydrate mainly include Raschig method, urea method, ketazine method and hydrogen peroxide method. The Raschig method uses ammonia as a nitrogen source, and uses sodium hypochlorite to oxidize ammonia gas to produce hydrazine hydrate. Because this method needs to use excessive ammonia, it needs to add a recovery device and produce a large amount of salts such as sodium chloride and ammonium chlor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F1/28C02F1/44C02F1/20C02F1/78C02F101/30
CPCC02F1/20C02F1/281C02F1/283C02F1/442C02F1/444C02F1/725C02F1/78C02F9/00C02F2101/30
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