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

Preparation method of decyanation agent and usage thereof

A decyanation agent and decyanation technology, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve the problems of limited decyanation effect, limited operating conditions, high dosage, etc., and achieve the treatment effect Good, reduce investment cost, low cost effect

Active Publication Date: 2012-08-15
INST OF PROCESS ENG CHINESE ACAD OF SCI
View PDF6 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the prior art has the following disadvantages: 1. The operation is cumbersome; 2. The dosage is high and the cost is too large; 3. The operating conditions are limited; 4. The decyanation effect is limited

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

[0040] The concentration of cyanide in the biochemical effluent of a certain coking wastewater is 5-6mg / L, and the water volume is 80m 3 / h. In this example, polymerized ferric sulfate and polyacrylamide are used as coagulants. The dosage of polymerized ferric sulfate reaches 2500 mg / L. When the polyacrylamide is 5 mg / L, the effect of coagulation to remove total cyanide is not ideal, and the total cyanide content of effluent It is 4.8mg / L, has almost no effect, and far exceeds the national comprehensive sewage discharge standard (GB 8978-1996, less than 0.5mg / L).

[0041] Preparation of decyanation agent: when the temperature is 25° C., add the organic high molecular polymer solution into the inorganic polymer mixed solution at a flow rate of 2.4 L / h, and fully stir for 2 hours. Wherein, the volume ratio of the organic polymer solution and the inorganic polymer solution is 1:10, and the organic polymer is polyacrylamide, polyacrylic acid, polyethyl methacrylate, polyallylamin...

Embodiment 2

[0044] The cyanide content of a certain cyanide-containing wastewater is 3-4mg / L. The enterprise uses polymeric ferric sulfate and polyacrylamide as coagulants. The dosage of polymeric ferric sulfate reaches 2000 mg / L, and when the polyacrylamide is 5 mg / L, the effect of removing cyanide by the existing process is not ideal, and the cyanide in the effluent The content is 3-4mg / L, which has almost no effect and exceeds the national comprehensive sewage discharge standard (GB 8978-1996, less than 0.5mg / L).

[0045] Preparation of decyanation agent: when the temperature is 70°C, add the organic high molecular polymer solution into the inorganic polymer mixed solution at a flow rate of 10 L / h, and fully stir for 3 hours. Wherein, the volume ratio of the organic polymer solution to the inorganic polymer solution is 1:20, and the organic polymer is polyacrylamide, polyacrylic acid, polyallylamine hydrochloride, maleic acid-dimethylamine It is a mixture of propyl methacrylamide copo...

Embodiment 3

[0048] The concentration of cyanide in a coking wastewater containing cyanide wastewater is 4-5mg / L, and the influent water volume is 80m 3 / h. The enterprise uses polymerized ferric sulfate and polyacrylamide as coagulants. The dosage of polymerized ferric sulfate reaches 2500mg / L, and when the polyacrylamide is 5mg / L, the effect of coagulation to remove total cyanide is not ideal, and the total cyanide content in the effluent is 4.8mg / L, almost no effect. It far exceeds the national comprehensive sewage discharge standard (GB 8978-1996, less than 0.5mg / L).

[0049] Preparation of decyanation agent: when the temperature is 45° C., add the organic high molecular polymer solution into the inorganic polymer mixed solution at a flow rate of 1.5 L / h, and fully stir for 1.5 hours. Among them, the volume ratio of the organic polymer solution to the inorganic polymer solution is 1:40, and the organic polymer is polyacrylamide, hydrolyzed polymaleic acid, polyhydroxyethyl methacryla...

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 preparation method of a decyanation agent and usage thereof. The decyanation agent with an inorganic-organic composite macromolecular structure is prepared by a copolymerization method through an inorganic polymer and an organic macromolecular polymer. The preparation method comprises the following steps of: adding the decyanation agent in waste water, and simultaneously doping an inorganic metal salt liable to capture dissociative cyanogen to efficiently remove the low-concentration cyanide, and finally, controlling the cyanide below the national integrated wastewater discharge standard to efficiently remove the cyanide by means of such functions as complexation, flocculation, bridging and charge neutrality. Compared with the prior art, the decyanation agent provided by the invention not only has the advantages of effectively removing the low-concentration cyanide and high decyanation efficiency, but also having a simple medicine preparation method, low medicine feed dosage, low cost, no additional equipment, simple process operation and extensive usage, so that the decyanation agent is suitable for low-concentration cyanogen-containing waste water and water bodies polluted by the cyanide.

Description

technical field [0001] The invention relates to a decyanation agent and its application, in particular, the invention relates to a preparation method of a decyanation agent and a method for deep removal of low-concentration cyanide in wastewater. Background technique [0002] Most cyanides are highly toxic or highly toxic, and can be rapidly absorbed through human skin, eyes or gastrointestinal tract. The lethal dose of oral sodium cyanide is 1-2 mg / kg. In addition, many cyanide-containing compounds can cause acute poisoning. There are two forms of total cyanide in wastewater: simple cyanide and complex cyanide. The traditional decyanation treatment of wastewater mainly relies on the addition of chemical agents. However, due to the relatively complex structure and stable form of complex cyanide, the decyanation effect is limited. After treatment, the effluent still contains a low concentration of complex cyanide. Keep 1~5mg / L, which is higher than the national comprehensive...

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): C02F1/58C02F101/18
Inventor 赵赫沈健曹宏斌李玉平李海波
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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