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 h

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

Example Embodiment

[0027] Example 1

[0028] Settling and filtering 4000 kilograms of seamless steel pipe pickling waste liquid, pumping it into a 6 cubic meter enamel acid-resistant reactor with an acid-proof pump, adding 1000 kilograms of industrial hydrochloric acid (36wt%), and adjusting the HCl content in the solution to 10wt%; start Stir, control the stirring speed to 60 rpm, add 25 kg of 36wt% nitric acid (0.5wt% of the total reaction solution) as a catalyst at room temperature; blow in air at a rate of 3 liters / min, and oxidize for 6 hours; then add 250 kg of trichloroisocyanuric acid (5w% of the total reaction liquid), continue the oxidation reaction for 3 hours, the air ventilation rate is 1,440 liters per ton of the reaction liquid; after the oxidation reaction, add 25 kg (accounting for the total reaction liquid 0.5w%) isopropanolamine as a stabilizer, and the reaction liquid is filtered and transferred to an acid-resistant storage tank to obtain a polyferric chloride coagulant. It is ...

Example Embodiment

[0029] Example 2

[0030] Settling and filtering 4000 kilograms of seamless steel pipe pickling waste liquid, using an acid-proof pump to pump into a 6 cubic meter enamel acid-proof reactor, adding 1000 kilograms of industrial hydrochloric acid (36wt%), control the HCl content in the solution to 10wt%; start Stir, the stirring speed is controlled at 80 rpm, add 36wt% nitric acid 50 kg (1wt% of the total reaction solution) as a catalyst at room temperature; oxygen gas is introduced at a rate of 2 liters / min for oxidation reaction for 6 hours; then 250 kg are added Trichloroisocyanuric acid (5wt% of the total reaction liquid) continues the oxidation reaction for 3 hours, the oxygen ventilation rate is 960 liters per ton of the reaction liquid; after the oxidation reaction, add 25 kg (0.5wt% of the total reaction liquid ) Isopropanolamine is used as a stabilizer, and the reaction liquid is filtered and transferred to an acid-resistant storage tank to obtain a polyferric chloride coa...

Example Embodiment

[0031] Example 3

[0032] Settling and filtering 4000 kilograms of seamless steel pipe pickling waste liquid, using an acid-proof pump to pump into a 6 cubic meter enamel acid-proof reactor, adding 1000 kilograms of industrial hydrochloric acid (36wt%), control the HCl content in the solution to 10wt%; start Stir, the stirring speed is controlled at 80 revolutions / min, and 75 kg of 36wt% nitric acid (accounting for 1.5wt% of the total reaction liquid) is added as a catalyst at room temperature; oxygen is introduced at a rate of 2 liters / min for oxidation reaction for 6 hours; then 150 is added Kg of trichloroisocyanuric acid (3wt% of the total reaction liquid) continues the oxidation reaction for 3 hours, the oxygen ventilation rate is 960 liters per ton of the reaction liquid; add 25 kg (0.5wt% of the total reaction liquid) isopropanol Amine acts as a stabilizer, after filtering, the reaction solution is transferred to an acid-resistant storage tank to obtain a polyferric chlori...

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 Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap