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Method for treating sewage by blast furnace heavy slag and blast furnace gas ash

A technology of blast furnace gas ash and blast furnace heavy slag, which is applied in chemical instruments and methods, water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of high operating cost, promote electrode reaction, and increase potential difference , Improve the effect of COD

Active Publication Date: 2011-07-20
杨忠刚
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The micro-electrolysis method, also known as the internal electrolysis method, zero-valent iron method, and iron-carbon method, is a sewage treatment method that has been widely studied and applied. The Fe / C micro-electrolysis columns (towers) currently used for sewage treatment are filled with mostly Mainly mixed with unmodified main iron filings and activated carbon, this kind of Fe / C micro-electrolytic filler has high operating costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The high-concentration printing and dyeing sewage of Shandong Lanyan Co., Ltd., COD3500mg / l, chroma 10200 times, and pH greater than 12, take 2.5m3 of printing and dyeing sewage and adjust the pH to less than 3 with 20% H2SO4, from the bottom of the micro-electrolytic pool, through the blast furnace heavy slag into the The sewage treatment layer composed of coke and blast furnace gas ash is left to stand for more than 2 hours. The COD degradation rate is 40.1%, the color degradation rate is 40%, and the pH is greater than 5.5.

Embodiment 2

[0019] Shandong Xinhua Pharmaceutical Co., Ltd. produced nitrosation mother liquid sewage produced by caffeine, COD37500mg / l, NH3-N1890mg / l, pH less than 5, took 25m3 of sewage and adjusted the pH to less than 3 with 20% H2SO4, and treated the bottom of the pool with micro-electrolysis, and then Blast furnace heavy slag is put into the three-layer sewage treatment layer consisting of coke and blast furnace gas ash, and left to stand for more than 3 hours. The COD degradation rate is 40%, the NH3-N degradation rate is 30%, and the pH is greater than 5.

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Abstract

The present invention relates to a method for treating sewage, which comprises the comprehensive utilization of blast furnace heavy slag and blast furnace gas ash. The method is characterized in that the blast furnace heavy slag is used as a bedding layer; coke and the blast furnace gas ash are overlapped from bottom to top to form a sewage iron-carbon treatment layer; and the iron-carbon treatment layer utilizes a micro-electrolysis theory to treat the sewage. The method reduces production cost for treating the sewage only by an iron dust-active carbon treatment layer, makes the blast furnace heavy slag and the blast furnace gas ash comprehensively utilized simultaneously, is environmentally-friendly and economical, and has wider application and development prospect.

Description

technical field [0001] The invention relates to a sewage treatment method, which includes comprehensive utilization of blast furnace heavy slag and blast furnace gas ash. technical background [0002] The micro-electrolysis method, also known as the internal electrolysis method, zero-valent iron method, and iron-carbon method, is a sewage treatment method that has been widely studied and applied. The Fe / C micro-electrolysis columns (towers) currently used for sewage treatment are filled with mostly Based on the mixture of unmodified main iron filings and activated carbon, this kind of Fe / C micro-electrolytic filler has relatively high operating costs. Contents of the invention [0003] The object of the present invention is to provide a method for treating sewage by using blast furnace heavy slag and blast furnace gas ash, and at the same time realize the comprehensive utilization of the solid waste produced by blast furnace ironmaking—blast furnace heavy slag and blast fu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/461
Inventor 杨忠刚
Owner 杨忠刚