Check patentability & draft patents in minutes with Patsnap Eureka AI!

Flue gas desulfurization (FGD) and comprehensive utilization method for flyash pudding blast furnace slag

A technology of fly ash and blast furnace slag, applied in separation methods, chemical instruments and methods, solid waste removal, etc., can solve the problems of increased power consumption, water consumption, increased operating costs, and large amount of fly ash, etc., to achieve Energy saving, environmental protection, low cost and operating costs

Active Publication Date: 2010-06-23
史汉祥
View PDF4 Cites 24 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using such fly ash for desulfurization with the method proposed in this application will inevitably result in a large amount of fly ash used as an absorbent, 90% of the inerts will be brought into the desulfurization system, the power consumption and water consumption will increase, and the wear and tear of equipment will increase. , resulting in higher operating costs

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 Construction

[0019] Technical process of the present invention is specifically as follows:

[0020] (1), fly ash pretreatment:

[0021] 1) Pre-blended co-solvent in fly ash or blast furnace slag, co-solvent is fluoride salt (NH 4 F), fluoride salt (NH 4 The addition amount of F) is 1-10% of the mass of fly ash or blast furnace slag.

[0022] 2) Add water into the immersion tank, and add fly ash or blast furnace slag mixed with fluoride salt when the mixer is turned on to form a thick slurry of fly ash or blast furnace slag with a liquid-solid ratio of 2.8-3.2L / kg. Soak for 5-20 hours and set aside.

[0023] 3) Transfer the soaked fly ash or blast furnace slag thick slurry to the slurry mixing tank, add water to dilute to a liquid-solid ratio of 4-10L / kg while stirring, then add MnO 2 The mixed catalyst composed of pyrolusite with grade ≥35% and industrial ferrous sulfate is prepared into fly ash or blast furnace slag slurry. The amount of pyrolusite added is 1 to 5% of the mass of fly...

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 method which uses flyash and pudding blast furnace slag for desulfurization in flue gas and comprehensively uses substances after flue gas desulfurization. The flue gas desulfurization (FGD) and comprehensive utilization method comprises the following steps: pre-treating flyash to prepare the flyash into flyash or blast furnace grout; desulfurizing (SO2 absorption), and evacuating the desulfurated flue gas from a chimney after passing through a defroster; filtering and washing; and neutralizing and removing impurities. The required Al compound can be prepared by filtering and separating heavy metal sulfide from solution, and further processing Al2(SO4)3 solution after removal of heavy metal ions. The invention has simple process flow, needs no complex equipment, fully makes use of waste materials such as flyash, pudding blast furnace slag and the like, has low cost and operation cost, saves energy, protects environment, effectively remove SO2 in flue gas and recoveries valuable metals from the waste materials.

Description

technical field [0001] The invention provides a method for how to use fly ash and ironmaking blast furnace slag in flue gas for desulfurization, and for the comprehensive utilization of substances after flue gas desulfurization. Background technique [0002] The patent application with the application number of 200910008934.9 "Method for Absorbing Sulfur Dioxide in Flue Gas Using Fly Ash as Absorbent" proposes to use coal ash as absorbent to utilize the basic oxides in fly ash and the SO in flue gas 2 The reaction generates corresponding stable compounds and reduces SO in flue gas 2 , to achieve the purpose of desulfurization. Because the content of basic oxides in fly ash is generally low, the sum of various basic oxides does not exceed 10%. Using such fly ash for desulfurization with the method proposed in this application will inevitably result in a large amount of fly ash used as an absorbent, 90% of the inerts will be brought into the desulfurization system, the power...

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): B01D53/80B01D53/50B09B3/00C01F7/02
Inventor 史汉祥
Owner 史汉祥
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com