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

Production technology for preparing polyferric chloride coagulant from seamless steel pipe acid-washing waste liquid

A ferric chloride-based, pickling waste liquid technology, applied in the direction of ferric halides, etc., can solve the problems of high energy consumption, and achieve the effects of low energy consumption, complete reaction, and good stability

Inactive Publication Date: 2016-01-27
LIAOCHENG UNIV
View PDF4 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method requires the boiler to be heated to 90-95°C, which consumes a lot of energy.

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
  • Production technology for preparing polyferric chloride coagulant from seamless steel pipe acid-washing waste liquid
  • Production technology for preparing polyferric chloride coagulant from seamless steel pipe acid-washing waste liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 4000 kilograms of seamless steel pipe pickling waste liquid was settled and filtered, and pumped into a 6 cubic meter enamel acid-resistant reaction kettle with an acid-resistant pump, and 1000 kilograms of industrial hydrochloric acid (36wt%) was added to adjust the HCl content in the solution to 10wt%. Stir, the control stirring speed is 60 revs / min, add 25 kilograms of nitric acid (accounting for 0.5wt% of reaction liquid total amount) of 36wt% under room temperature as catalyst; Pass into air with 3 liters / min speed, oxidation reaction 6 hours; Add 250 kilograms of trichloroisocyanuric acid (5w% for the total amount of the reaction solution), continued the oxidation reaction for 3 hours, and the ventilation rate of the air was 1440 liters per ton of the reaction solution; after the oxidation reaction finished, add 25 kilograms (accounting for the total amount of the reaction solution 0.5w%) of isopropanolamine is used as a stabilizer, and the reaction solution is fil...

Embodiment 2

[0030] 4,000 kilograms of seamless steel pipe pickling waste liquid was settled and filtered, and pumped into a 6 cubic meter enamel acid-resistant reaction kettle with an acid-resistant pump, and 1,000 kilograms of industrial hydrochloric acid (36wt%) was added to control the HCl content in the solution to 10wt%. Stir, stirring speed control 80 rev / min, add 50 kilograms of 36wt% nitric acid (accounting for 1wt% of reaction solution total amount) under room temperature as catalyst; Feed oxygen with 2 liters / minute speed and carry out oxidation reaction 6 hours; Add 250 kilograms again Trichloroisocyanuric acid (5wt% for the total amount of the reaction solution) continued the oxidation reaction for 3 hours, and the ventilation rate of oxygen was 960 liters per ton of the reaction solution; after the oxidation reaction finished, add 25 kilograms (accounting for 0.5wt% ) isopropanolamine as a stabilizer, and the reaction liquid is filtered and then transferred to an acid-resistan...

Embodiment 3

[0032] 4,000 kilograms of seamless steel pipe pickling waste liquid was settled and filtered, and pumped into a 6 cubic meter enamel acid-resistant reaction kettle with an acid-resistant pump, and 1,000 kilograms of industrial hydrochloric acid (36wt%) was added to control the HCl content in the solution to 10wt%. Stir, stirring speed control 80 revs / min, add 75 kilograms of nitric acid (accounting for 1.5wt% of reaction liquid total amount) of 36wt% under room temperature as catalyst; Feed oxygen with 2 liters / minute speed and carry out oxidation reaction 6 hours; Add 150 One kilogram of trichloroisocyanuric acid (3wt% for the total amount of the reaction solution) continued the oxidation reaction for 3 hours, and the ventilation rate of oxygen was 960 liters per ton of the reaction solution; 25 kilograms (accounting for 0.5wt% of the total reaction solution) of isopropanol were added Amine is used as a stabilizer. After filtering, the reaction solution is transferred to an ac...

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

The invention relates to a production technology for preparing a polyferric chloride coagulant from a seamless steel pipe acid-washing waste liquid. According to the invention, seamless steel pipe acid-washing iron-containing waste hydrochloric acid liquid is used as a raw material, and a step-by-step-oxidation method is adopted. During the initial phase, air or oxygen is used for oxidation, and nitric acid is used as a catalyst; and during the later phase, a trichloroisocyanuric acid oxidizing agent is used for oxidation. The reaction is completely thorough, and conversion efficiency is high. As isopropanolamine is used as a stabilizing agent, product quality is stable, and performance is excellent. Iron content of a product prepared by the method reaches 11.6% and above, basicity reaches 16.8% and above, and stability is good. When the coagulant is used in flocculation tests of simulation wastewater and urban domestic wastewater, turbidity removal rate reaches 90.0% and above. The coagulant has a good water purification effect. According to the technology, a polyferric chloride coagulant is prepared at normal temperature and at normal pressure without external heating, and energy consumption is little. The technology is simple. By the technology, the environmental protection purposes of dealing with waste by waste and turning waste into wealth can be achieved, cyclic utilization of waste is realized, and good economic benefit and social benefit can be generated.

Description

technical field [0001] The invention relates to a preparation method of a water treatment agent, in particular to a production process for preparing a polyferric chloride coagulant from pickling waste liquid of seamless steel pipes. Background technique [0002] During the processing of seamless steel pipes, a series of chemical treatment processes such as degreasing, water washing, pickling, water washing, secondary pickling, neutralization, passivation, and water washing are required; among them, cheap hydrochloric acid is often used for pickling. During the process, the hydrochloric acid in the hydrochloric acid washing solution is continuously consumed, and the ferrous ions therein are also continuously increasing with the consumption of hydrochloric acid, thus producing a large amount of iron-containing pickling waste, and its composition generally contains Iron is 10% to 14%, and hydrogen chloride is 3% to 5%. Generally, one ton of iron-containing waste acid is dischar...

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
IPC IPC(8): C01G49/10
CPCC01G49/10
Inventor 陶绪泉陈汪洋崔慧葛祥才李玉超谢倩
Owner LIAOCHENG UNIV
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