Method and system of destruction of volatile compounds in wastewater
First Claim
1. A method of destruction of volatile organic and inorganic compounds in wastewater consisting of following steps, which occur consecutively or simultaneously:
- adjustment of temperature and pH of said wastewater;
circulating said wastewater by a pumping means via a stripping-chemisorption column;
circulating a gaseous medium via a circulation circuit, which includes following elements and some features of their operation;
said stripping-chemisorption column;
two heat regeneration means;
a blowing means; and
a thermal oxidation means, said two heat regeneration means serve alternatively one—
for preheating said gaseous medium before oxidation of said volatile organic and inorganic compounds'"'"' vapors in said thermal oxidation means and the other—
for cooling said gaseous medium before its introduction into said stripping-chemisorption column;
supply of oxygen into said gaseous medium during the course of said thermal oxidation, said supply is performed in such rate that it ensures safety and complete oxidation of said volatile organic and inorganic compounds;
chemisorption of products of said thermal oxidation of said volatile organic and inorganic compounds'"'"' vapors in said stripping-chemisorption column by said wastewater;
alternation of flow direction of said gaseous medium with alternating the roles of said two heat regeneration means, said alternation is performed in accordance with change of temperatures in said heat regeneration means;
said alternation it is executed by said blowing means or by a system of shutting means installed on said circulation circuit.
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Abstract
The invention proposes a method of destruction of volatile organic and inorganic compounds in wastewater, this method includes following stages: stripping the aforementioned volatile compounds in a stripping-chemisorption column; preliminary heating the gaseous medium containing these volatile compounds in a first heat regenerator; thermal, flare or thermo-catalytic oxidation of the volatile compounds in circulating gaseous medium; cooling the gaseous medium in a second heat regenerator; chemisorption of acidic gases from the gaseous medium in the stripping-chemisorption column with stripping at the same time additional amount of the volatile compounds from the wastewater. After specific period, direction of the gaseous medium flow is alternated. The proposed method can be executed at elevated temperature. The invention includes as well systems realizing the proposed method.
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Citations
2 Claims
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1. A method of destruction of volatile organic and inorganic compounds in wastewater consisting of following steps, which occur consecutively or simultaneously:
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adjustment of temperature and pH of said wastewater; circulating said wastewater by a pumping means via a stripping-chemisorption column; circulating a gaseous medium via a circulation circuit, which includes following elements and some features of their operation;
said stripping-chemisorption column;
two heat regeneration means;
a blowing means; and
a thermal oxidation means, said two heat regeneration means serve alternatively one—
for preheating said gaseous medium before oxidation of said volatile organic and inorganic compounds'"'"' vapors in said thermal oxidation means and the other—
for cooling said gaseous medium before its introduction into said stripping-chemisorption column;
supply of oxygen into said gaseous medium during the course of said thermal oxidation, said supply is performed in such rate that it ensures safety and complete oxidation of said volatile organic and inorganic compounds;chemisorption of products of said thermal oxidation of said volatile organic and inorganic compounds'"'"' vapors in said stripping-chemisorption column by said wastewater; alternation of flow direction of said gaseous medium with alternating the roles of said two heat regeneration means, said alternation is performed in accordance with change of temperatures in said heat regeneration means;
said alternation it is executed by said blowing means or by a system of shutting means installed on said circulation circuit.
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2-16. -16. (canceled)
Specification