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An adsorption column that simultaneously adsorbs heavy metal ions and volatile organic compounds in waste gas

A technology for volatile organic compounds and heavy metal ions, which is applied in the field of adsorption columns, can solve the problems that affect the cost and effect of waste gas treatment, and the lack of adsorbents, etc., and achieve the effects of high toxicity, short adsorption time and flexible structure

Inactive Publication Date: 2015-09-16
浙江文国重工机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since heavy metals and volatile organic compounds belong to inorganic substances and organic substances, their structures and properties are completely different, so there is currently no adsorbent with good adsorption performance for both, which seriously affects the cost and effect of waste gas treatment.

Method used

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  • An adsorption column that simultaneously adsorbs heavy metal ions and volatile organic compounds in waste gas

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Preparation of Composite Adsorbent Material

[0027] 1) Pretreatment of carbon nanotubes: Put carbon nanotubes into a mixed solution of concentrated nitric acid and hydrofluoric acid, soak them under high pressure in an argon environment, maintain them at 120°C for 10 hours, cool them to room temperature, and then take out the carbon nanotubes. The nanotubes are washed and filtered with deionized water, and set aside;

[0028] 2) Preparation of calcium chloride: hydrochloric acid enters the reaction tank, and limestone is lifted into the reaction tank through a bucket elevator. After the reaction, the gas is washed with water in the tail gas scrubber and alkali washed in the tail gas scrubber, and the gas reaches the standard and is discharged by the induced draft fan. After the pH value of the liquid reaches 5, it enters the neutralization tank directly through the bypass pipe, and after adding lime milk to react, it is poured into the clarification tank through the ne...

Embodiment 2

[0038] 1) Pretreatment of carbon nanotubes: Put carbon nanotubes into a mixed solution of concentrated nitric acid and hydrofluoric acid, soak them under high pressure in an argon environment, maintain at 150°C for 15 hours, cool to room temperature, and then take out the carbon nanotubes. The nanotubes are washed and filtered with deionized water, and set aside;

[0039] 2) Preparation of calcium chloride: hydrochloric acid enters the reaction tank, and limestone is lifted into the reaction tank through a bucket elevator. After the reaction, the gas is washed by water in the tail gas scrubber and alkali washed by the tail gas scrubber. After the pH value of the liquid reaches 7, it enters the neutralization tank directly through the bypass pipe, and after adding lime milk to react, it is poured into the clarification tank through the neutralization pump, and the clarified liquid overflows into the clarification liquid tank, and the calcium chloride clear liquid is filtered En...

Embodiment 3

[0049] 1) Pretreatment of carbon nanotubes: Put carbon nanotubes into a mixed solution of concentrated nitric acid and hydrofluoric acid, soak them under high pressure in an argon environment, maintain them at 130°C for 18 hours, cool them to room temperature, and then take out the carbon nanotubes. The nanotubes are washed and filtered with deionized water, and set aside;

[0050] 2) Preparation of calcium chloride: hydrochloric acid enters the reaction tank, and limestone is lifted into the reaction tank through a bucket elevator. After the reaction, the gas is washed with water in the tail gas scrubber and alkali washed in the tail gas scrubber, and the gas reaches the standard and is discharged by the induced draft fan. After the pH value of the liquid reaches 6, it enters the neutralization tank directly through the bypass pipe, and after adding lime milk to react, it is poured into the clarification tank through the neutralization pump, and the clarified liquid overflows ...

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Abstract

The invention discloses an adsorption column capable of absorbing heavy metal ions and volatile organic matters in waste gas simultaneously. The adsorption column comprises a metal pipe, wherein flange plates are arranged at both the waste gas entry end and the waste gas exit end of the metal pipe, an adsorbing material catching cloth bag is fixed in the inner cross section of the column and close to the waste gas exit end, the flange plate at the waste gas entry end of the metal pipe is connected with a waste gas discharging pipe opening or a flange plate at the waste gas exit end of another adsorption column, and the metal pipe is filled with a composite adsorbing material. The adsorption column is combined with a carbon nano tube composite material, has a nano-structure, and has the characteristics of stable performance, large specific surface area, special adsorbing performance to heavy metal, and a composite adsorbing material having a high adsorption capacity and being capable of adsorbing volatile organic matters and heavy metal can be obtained. The adsorption column is flexible in structure, can be combined in series or in parallel, and can be used for processing waste gas with high toxicity, low concentration and strong runnability, the adsorption time is short, and the adsorbing efficiency is high.

Description

technical field [0001] The invention relates to an adsorption column for simultaneously adsorbing heavy metal ions and volatile organic compounds in waste gas, belonging to the field of environmental protection. Background technique [0002] With the rapid development of industrialization and the rapid advancement of urbanization, environmental pollution has become increasingly serious, especially air pollution in recent years. Volatile organic compounds and heavy metals are two important sources of air pollution. [0003] According to the definition of the World Health Organization, the boiling point is 50-250°C, the saturated vapor pressure at room temperature exceeds 133.32Pa, and a class of organic compounds that exist in the air in the form of steam at room temperature are volatile organic compounds. The main components include: hydrocarbons, halogenated Hydrocarbons, benzene series, Freon series, polycyclic aromatic hydrocarbons, etc. Volatile organic compounds have ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/04
Inventor 张文国
Owner 浙江文国重工机械有限公司
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