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

A kind of coking wastewater pyrolysis gas corrosion inhibitor and preparation method thereof

A technology for pyrolyzing coal gas and coking wastewater, which is applied in the field of iron and steel metallurgy and chemical industry, which can solve the problems of water consumption and flue gas heat loss, and achieve the effects of uniform corrosion protection, extended service life, and high comprehensive corrosion inhibition rate

Inactive Publication Date: 2016-08-17
SHAANXI YUTENG IND
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The converter flue gas has a high temperature (850°C~1000°C). A large amount of water is sprayed at this position to evaporatively cool the flue gas to about 200°C. At the same time, rough dust removal is also carried out, but a large amount of flue gas heat is lost during the cooling process, and a large amount of water resources are consumed, and the water consumption is about 0.1m 3 / ton of steel

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of coking wastewater pyrolysis gas corrosion inhibitor and preparation method thereof
  • A kind of coking wastewater pyrolysis gas corrosion inhibitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The pyrolysis gas corrosion inhibitor of coking wastewater in this example is made of 40% rosin imidazoline polyoxyethylene ether, 25% polyethylene oxide octadecylamine, and 35% pentane by mass fraction.

[0018] The specific preparation method of the coking wastewater pyrolysis gas corrosion inhibitor in this embodiment includes the following steps:

[0019] 1) Stirring and reacting rosin and diethylenetriamine at 210°C for 2h, then raising the temperature to 230°C under a vacuum condition of 2.96kPa, and keeping the temperature for 4h to obtain rosin imidazoline; among them, rosin and diethylenetriamine The molar ratio is 3:1;

[0020] 2) After mixing rosin imidazoline, boric acid and ethylene oxide, reflux reaction at 0.2 MPa and 60°C for 3 hours, so that rosin imidazoline and ethylene oxide undergo addition reaction to obtain rosin imidazoline polyoxyethylene ether; , the mol ratio of rosin imidazoline, catalyst and ethylene oxide is 3:0.5:1;

[0021] 3) Add rosin...

Embodiment 2

[0023] The pyrolysis gas corrosion inhibitor of coking wastewater in this embodiment is made of 40% rosin imidazoline polyoxyethylene ether, 30% isopropylamine, and 30% hexane by mass fraction.

[0024] The specific preparation method of the coking wastewater pyrolysis gas corrosion inhibitor in this embodiment includes the following steps:

[0025] 1) Stir and react rosin and diethylenetriamine at 220°C for 2h, then raise the temperature to 240°C under a vacuum condition of 4.33kPa, and keep the temperature for 4h to obtain rosin imidazoline; among them, rosin and diethylenetriamine The molar ratio is 3:1;

[0026] 2) After mixing rosin imidazoline, boric acid and ethylene oxide, reflux reaction at 0.3MPa and 60°C for 3 hours to obtain rosin imidazoline polyoxyethylene ether; wherein, the molar ratio of rosin imidazoline, boric acid and ethylene oxide is 3:0.5:1;

[0027] 3) Add rosin imidazoline polyoxyethylene ether, isopropylamine and hexane into the container, then rais...

Embodiment 3

[0029] In this example, the coking wastewater pyrolysis gas corrosion inhibitor is prepared by mixing 35% rosin imidazoline polyoxyethylene ether, 30% cyclohexylamine, and 35% hexane and octane at a volume ratio of 3:1 by mass fraction. made of mixed solvents.

[0030] The specific preparation method of the coking wastewater pyrolysis gas corrosion inhibitor in this embodiment includes the following steps:

[0031] 1) Stir and react rosin and diethylenetriamine at 210°C for 2h, then raise the temperature to 230°C under a vacuum condition of 3.78Pa, and keep the temperature for 4h to obtain rosin imidazoline; among them, rosin and diethylenetriamine The molar ratio is 3:1;

[0032] 2) After mixing rosin imidazoline, boric acid and ethylene oxide, reflux reaction at 0.3MPa and 60°C for 3 hours to obtain rosin imidazoline polyoxyethylene ether; wherein, the molar ratio of rosin imidazoline, boric acid and ethylene oxide is 3:0.5:1;

[0033] 3) Add rosin imidazoline polyoxyethy...

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

No PUM Login to View More

Abstract

A pyrolysis gas corrosion inhibitor for coking wastewater and a preparation method thereof, prepared from 35-40% rosin imidazoline polyoxyethylene ether, 25-30% organic amine and 30-35% alkane organic solvent In the process, add rosin imidazoline polyoxyethylene ether, organic amine and alkane organic solvent into the container, then raise the temperature to reflux state for reaction, and discharge the material to obtain the coking wastewater pyrolysis gas corrosion inhibitor. The coking wastewater pyrolysis gas corrosion inhibitor of the present invention can play a double corrosion inhibition role of gas and gas after pyrolysis of coking wastewater, can instantly vaporize in the flue gas pipeline to form a corrosion protection film, and isolate corrosive gas from contacting with equipment , to achieve corrosion inhibition effect. The addition amount of the coking wastewater pyrolysis gas corrosion inhibitor of the present invention is 80-100ppm of the volume of the gas volume, and the corrosion inhibition rate reaches more than 90%. Moreover, the dosing operation is simple and easy, and the work efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgy and chemical industry, and in particular relates to a preparation method of a pyrolysis gas corrosion inhibitor for coking wastewater. Background technique [0002] Coking wastewater is a general term for wastewater from various links in the coking process of coking plants, mainly including the stage of coal pyrolysis and carbonization, the stage of recovery and purification of raw coal gas, and the stage of recovery and refining of chemical products. Coking wastewater has many and complex components, and contains a large number of aromatic organic pollutants with high concentration and refractory organic pollutants and inorganic salt pollutants such as sulfur, nitrogen and phosphorus. These pollutants have high concentration and chroma, and are extremely toxic. It seriously pollutes the environment and it is difficult to meet the emission standards after biochemical treatment. ...

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 Patents(China)
IPC IPC(8): C23F11/02
Inventor 陈力群
Owner SHAANXI YUTENG IND
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