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双氧水制备系统

发布时间:2020-01-14

采用蒽醌法钯触媒固定床生产工艺,系统包括氢化、氧化、萃取净化、工作液后处理和浓缩五个工段。原理是:以2-乙基蒽醌(EAQ)四氢2-乙基蒽醌(H4EAQ)为载体,重芳烃(AR)和四丁基脲(TBU)、磷酸三辛酯(TOP)为混合溶剂,配制成一定组成的溶液(简称工作液),将该溶液与氢气一起通入装有催化剂的氢化反应器,在一定压力和温度下进行氢化反应,得到相应的氢蒽醌(HEAQ)溶液(简称氢化液)。该溶液再被空气中氧所氧化,溶液中的氢蒽醌恢复成原来的蒽醌,同时生成双氧水,此时的工作液称氧化液。利用双氧水在水和工作液中溶解度的不同以及工作液和水的比重差,用水萃取含有双氧水的氧化液,得到双氧水的水溶液,即双氧水。该萃取液经重芳烃净化除去可溶性有机杂质即得到成品双氧水(浓度约35%),被萃取后的氧化液称为萃余液,萃余液经沉降、真空除水,送回氢化工序循环使用。浓度约为35%的稀品双氧水需要进一步提升过氧化氢浓度,则需要浓缩精馏制得50-60%w/w)的双氧水溶液。

The preparation process of anthraquinone palladium catalyst fixed bed is adopted. The system consists of five sections: hydrogenation, oxidation, extraction & purification, working solution post-treatment and concentration. The principle is: using 2-ethylanthraquinone (EAQ) and tetrahydro2-ethylanthraquinone (H4EAQ) as carriers, AR, TBU and TOP as mixed solvents to prepare a solution (working solution). The solution and hydrogen are introduced into the hydrogenation reactor filled with catalyst, and the hydrogenation reaction is carried out under a certain pressure and temperature to obtain the hydrogen anthraquinone (HEAQ) solution (hydrogenation solution for short). The solution is then oxidized by oxygen in the air, and the HEAQ in the solution is restored to the original EAQ, and hydrogen peroxide is generated at the same time. At this time, the working solution is called oxidation solution. Using the different solubility of hydrogen peroxide in water and working solution and the difference of specific gravity between working solution and water, the oxidation solution containing hydrogen peroxide is extracted with water to obtain the aqueous hydrogen peroxide, i.e. hydrogen peroxide. The extracted liquid is purified by heavy aromatics to remove the soluble organic impurities to obtain the finished product hydrogen peroxide (concentration is about 35%). The oxidation solution after extraction is called raffinate, which is sent back to the hydrogenation process for recycling after sedimentation and vacuum water removal. Hydrogen peroxide with a concentration of 50-60% (w/w) can be obtained by further concentration and rectification of the 35% hydrogen peroxide.

系统主要反应方程式:

Main reaction equation of the system:

1、 氢化反应:Hydrogenation:

EAQ + H2 HEAQ

EAQ + H2 H4EAQ

H4EAQ + H2 H4HEAQ

11111.png

2、 氧化反应:Oxidation reaction:

HEAQ + O2 EAQ + H2O2

H4HEAQ + O2 H4EAQ + H2O2

2222.png


流程图.png

双氧水制备系统工艺流程图

Process Flow Chart Of Peroxide Preparation System


技术特点:

(1) 采用全酸性工艺,从源头杜绝引发安全事故的隐患,装置运行安全稳定;

(2) 采用FAH新型高效催化剂并配套新型固定床结构,具有活性好、效率高、安全、寿命长等优点;

(3) 使用三组分溶剂体系,蒽醌溶解度高、安全可靠、氢效高,单套装置产能大;

(4) 使用的新型复配工作液组体系的氧化时间短,可大大缩小氧化塔体积,氧化效率高;

(5) 萃取塔内件经优化设计,萃余液双氧水含量低;

(6) 采用高效聚结、真空脱水等措施,有效分离工作液中水分含量,可确保白土床的工作液净化效率;

(7) 采用TBU溶剂体系+净化塔+高效相分离技术,产品TOC含量低。

(8) 采用国际一流品牌的离心式空气压缩机,操作简单、自动化程度高、运行稳定;

(9) 采用最先进的膨胀制冷发电机组及全自动活性碳颗粒吸附和脱附技术处理氧化尾气,确保尾气达标排放,同时将氧化尾气的势能转化为电能;

(10) 采用DCS控制系统、SIS安全仪表系统、ESD紧急停车系统保证系统的运行安全。


Technical features:


(1) Whole acid process is adopted to eliminate the hidden safety accidents from the source, ensuring the safety and stability of the plant;


(2) The new FAH high efficiency catalyst and new fixed bed structure are used, which has the advantages of good activity, high efficiency, safety and long service life;


(3) Three-component solvent system is used, with high anthraquinone solubility, safety and reliability, high hydrogen efficiency, and large capacity of single plant;


(4) The oxidation time of the new compound working solution system is short, the volume of the oxidation tower can be greatly reduced, and the oxidation efficiency is high;


(5) The optimized design of the extraction tower internals shows that the content of hydrogen peroxide in the raffinate is low;


(6) High efficiency coalescence, vacuum dehydration and other measures are adopted to effectively separate the water from the working solution, so as to ensure the purification efficiency of the working solution in the clay bed;


(7) Adopting TBU solvent system + purification tower + high efficiency phase separation technology, the product TOC content is low.


(8) Superior centrifugal air compressor is adopted, which is simple in operation, with high automation and stable operation;


(9) Adopt the most advanced expansion refrigeration generator set and full-automatic activated carbon particle adsorption and desorption technology to treat the oxidation tail gas, ensuring that the tail gas can satisfy the emission standard, and convert potential energy of the oxidation tail gas into electric energy;


(10) DCS control system, SIS safety instrument system and ESD emergency shutdown system are adopted to ensure the operation safety of the system.


工程案例:Installation references:

印尼金光集团PINDO工厂100T/D (50%)双氧水制备系统项目

100T/D (50%) Hydrogen Peroxide Preparation System Project for PINDO DELI, APP, Indonesia


印尼金光集团TK工厂300TPD (50%)双氧水制备系统项目

300T/D (50%) Hydrogen Peroxide Preparation System Project for TK Mill, APP, Indonesia


兰州泰邦化工科技有限企业15万吨/年(27.5%)双氧水制备系统

150,000T/a (27.5%) Hydrogen Peroxide Preparation System for Lanzhou Taibang Chemical Technology Co., Ltd.


兰州泰邦化工科技有限企业10万吨/年(27.5%)双氧水制备系统

100,000T/a (27.5%) Hydrogen Peroxide Preparation System for Lanzhou Taibang Chemical Technology Co., Ltd.

… …


15万吨/年(27.5%)双氧水制备系统
150,000T/a (27.5%) Hydrogen Peroxide Preparation System

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