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Liquid phase method for removing dioxin-like compounds from flue gas and device thereof

A technology of dioxin and flue gas, applied in the field of flue gas purification, can solve the problems of inability to achieve standard discharge, difficult practical application, low removal efficiency, etc., and achieve easy popularization and application, high utilization rate, and high removal efficiency Effect

Inactive Publication Date: 2009-11-11
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalytic oxidation method has been extensively studied, but it is difficult to be practically applied due to the need to operate at a relatively high temperature and high energy consumption
Microbial methods and advanced oxidation technologies show low removal efficiencies and cannot achieve discharge compliance

Method used

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  • Liquid phase method for removing dioxin-like compounds from flue gas and device thereof
  • Liquid phase method for removing dioxin-like compounds from flue gas and device thereof
  • Liquid phase method for removing dioxin-like compounds from flue gas and device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: take by weighing NaClO by proportioning 2 , NaClO and NaHCO 3 , add to the absorbent reactor, add water and mix well, so that the absorbent includes 0.01M NaClO 2 , 0.01M NaClO and 0.002M sodium bicarbonate NaHCO 3 . The pH value was adjusted to 8 with sodium hydroxide NaOH solution, and the desired absorbent was obtained by activating in the dark for 5 minutes at a temperature of 25°C.

Embodiment 2

[0023] Embodiment 2: take by weighing NaClO 2 , NaClO and Ca(ClO) 2 , add to the absorbent reactor, add water and mix well, so that the absorbent includes 0.1M NaClO 2 , 0.06M NaClO and 0.004M Ca(ClO) 2 . The pH value was adjusted to 9 with sodium hydroxide NaOH solution, and the desired absorbent was obtained by activating in the dark for 10 minutes at a temperature of 20°C.

Embodiment 3

[0024]Embodiment 3: take by weighing NaClO by proportioning 2 , NaClO and H 2 o 2 , add to the absorbent reactor, add water and mix well, so that the absorbent includes 0.05M NaClO 2 , 0.08M NaClO and 0.05M H 2 o 2 . The pH value was adjusted to 9.5 with sodium hydroxide NaOH solution, and the required absorbent was obtained by activating in the dark for 7 minutes at a temperature of 28°C.

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Abstract

The invention relates to a liquid phase method for removing dioxin-like compounds from flue gas and a device thereof. The invention is used for solving the problem of the dioxin-like compound removal in the incineration flue gas, which utilizes an absorbent to absorb the dioxin-like compounds in the flue gas in a jet bubbling reactor at the temperature of 50-120 DEG C and finish the purification process; the absorbent consists of an absorption liquid and an additive and the absorption liquid is the mixing solution of sodium chlorite and sodium hypochlorite, wherein the concentration of NaClO2solution is 0.01M to 0.1M per liter and the concentration of NaClO solution is 0.01M-0.08M per liter. The additive is one of calcium hypochlorite, sodium bicarbonate, hydrogen peroxide or disodium hydrogen phosphate and the dosage of the additive is 0.001M-0.05M per liter. The invention has removal rate of 94 percent to 98 percent and absorbent utilization ratio higher than 97 percent and is characterized by high removal efficiency, low investment and operation cost, simple device, stable operation, convenient use and the like.

Description

technical field [0001] The invention relates to a flue gas purification method and device, in particular to a method for removing dioxins in waste incineration flue gas in a liquid phase by using a jet bubbler, and belongs to the technical field of flue gas purification. Background technique [0002] With the rapid development of urbanization, urban garbage has become one of the most serious public hazards in the world today. At present, the most effective way to deal with urban waste is to realize waste reduction, recycling and harmlessness through incineration. Due to the complex composition of garbage, heavy metals, dioxins, SO 2 , HCl, HF and other toxic and harmful gases, causing serious pollution to the environment, among which dioxins have been proven to be the most toxic chlorine-containing organic compounds to the human body, and have been listed as the first batch of elimination substances stipulated by the Stockholm Convention One of the 12 persistent organic po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/70
Inventor 赵毅贺鹏
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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