Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Treatment process of phenol-acetone industrial wastewater

An industrial wastewater, phenol acetone technology, applied in multi-stage water treatment, water/sewage treatment, natural water treatment, etc., can solve the problems of poor applicability, high COD, low pH value, etc., and achieve good results and clear water quality. , the effect of high efficiency

Inactive Publication Date: 2020-02-21
SUZHOU DACHENG YOUFANG DATA TECH CO LTD
View PDF10 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The Chinese patent application number is CN201710531165.5, which discloses an industrial wastewater treatment process, including precipitation treatment, sedimentation separation, electrolytic treatment, chlorine dioxide treatment, anaerobic treatment, etc., combining traditional chlorine dioxide treatment with ozone oxidation and biological treatment The technology can effectively treat the difficult biodegradable macromolecular organic substances in industrial wastewater, which can improve the biodegradability of wastewater. However, phenol acetone industrial wastewater has the characteristics of small flow, high salt, high COD, and low pH value, and its applicability is not strong.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] preprocessing

[0052] Described pretreatment comprises the steps:

[0053] (1) Pre-stripping: The phenol-acetone wastewater is heated to 90~100°C by the preheater, and the heated wastewater enters the molecular mill, where the wastewater is dispersed into small liquids, and then undergoes flash stripping. The bottom is also fed with steam for secondary stripping;

[0054] (2) One-effect evaporation: The waste water after pre-stripping enters the one-effect evaporator for forced circulation heating and evaporation. The heating temperature is 135-140°C, and the evaporation temperature is 150-110°C. The evaporated liquid is pumped through the first-effect circulation Two-effect evaporator;

[0055] (3) Two-effect evaporation: The above-mentioned liquid is heated and evaporated by forced circulation in the second-effect evaporator. The heating temperature is 105~110°C, and the evaporation temperature is 80~85°C. The evaporated liquid is pumped to the third effect through...

Embodiment 2

[0061] biochemical treatment

[0062] Described biochemical treatment, comprises the steps:

[0063] (1) Inlet water: the steam condensate produced by the first-effect evaporator is sent to the steam condensation water pipe network in the factory area through self-pressure; the second-effect evaporator, three-effect evaporator, and four-effect forced circulation continuous crystallization evaporator The condensed liquid enters the condensate tank, and then is pumped to the sewage regulating tank. When the water enters, potassium dihydrogen phosphate and urea are added to the sewage regulating tank, and the feeding ratio depends on the COD concentration of the wastewater. Among them, it is most suitable to adjust the concentration ratio in water to COD:N:P=195:5:1, and add Na 2 CO 3 The solution adjusts the pH value of the incoming water, the pH value is 6-7, and the temperature of the sewage regulating tank is 20-30°C;

[0064] (2) Reaction: The sewage regulating tank is eq...

Embodiment 3

[0069] Chemical Oxidation Post-Treatment

[0070] The post-treatment of chemical oxidation comprises the steps of:

[0071] (1) Water intake: pump the above supernatant to the chemical oxidation treatment tank, feed the water to the pre-full liquid line of the chemical oxidation treatment tank, add hydrochloric acid to adjust the pH value of the feed water, and the pH value is 3;

[0072] (2) Reaction: put H into the chemical oxidation treatment pool 2 o 2 , FeS0 4 7H 2 O; H 2 o 2 The addition amount is 8mL / L, FeS0 4 7H 2 The addition of O is 2.6g / L;

[0073] (3) Outlet water: After the reaction is completed, the effluent is treated and discharged after the test reaches the standard.

[0074] Operation effect: After biochemical treatment, the wastewater is obtained, and then chemically oxidized and post-treated. The COD in the wastewater is less than 100mg / L, the removal rate of volatile phenols reaches more than 99%, and the wastewater discharge reaches the standard....

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
clearance rateaaaaaaaaaa
Login to View More

Abstract

The invention discloses a treatment process of phenol-acetone industrial wastewater. The treatment process sequentially comprises pretreatment, biochemical treatment and chemical oxidation post-treatment; wherein the pretreatment step comprises the following steps: heating the phenol-acetone wastewater to 90-100 DEG C by using a preheater, enabling the heated wastewater to enter a molecular mill,dispersing the wastewater into small liquids one by one, then carrying out flash steam stripping, introducing steam into the molecular mill through the bottom, and carrying out secondary steam stripping; sequentially carrying out first-effect evaporation, second-effect evaporation, third-effect evaporation and fourth-effect evaporation crystallization on obtained pre-stripped wastewater, and continuously carrying out biochemical treatment and chemical oxidation post-treatment on evaporated liquid. According to the treatment process of phenol-acetone industrial wastewater, aiming at the water quality characteristics of the phenol-acetone wastewater, a treatment scheme combining physical desalination, biochemical treatment and chemical oxidation post-treatment is adopted, the process is simple, the operation is convenient, zero emission of sewage is realized, no toxic or harmful by-product is generated in the treatment process, no pollution is caused, and extremely high economic benefitsand environmental benefits are achieved.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a treatment process for phenol-acetone industrial wastewater. Background technique [0002] As a basic chemical raw material, phenol has developed rapidly in China in recent years. Before 2000, the national phenol production capacity was about 250,000 tons per year. Up to now, the domestic phenol production capacity has exceeded the million mark, and the production capacity is still under planning. There are nearly a million tons. With the development of the domestic phenol market, the pressure on environmental protection will gradually emerge in the future. [0003] As one of industrial wastewater, phenol acetone wastewater has a wide range of sources and is extremely harmful to environmental pollution. [0004] big. As a widely used chemical raw material, phenolic organic compounds are very common by-products in the production process of chemical...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/10C02F103/36
CPCC02F1/04C02F1/06C02F1/08C02F1/10C02F1/5236C02F1/66C02F1/72C02F1/722C02F3/1205C02F3/1236C02F9/00C02F2101/101C02F2103/36C02F2301/08
Inventor 秦统云
Owner SUZHOU DACHENG YOUFANG DATA TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com