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Process for preparing a composite adsorption material capable of simultaneously absorbing heavy metal ions and volatile organic substances in waste gas

A technology of composite adsorption materials and volatile organic compounds, applied in separation methods, chemical instruments and methods, separation of dispersed particles, etc., can solve the problems affecting the cost and effect of waste gas treatment, no adsorbent, etc., and achieve short adsorption time, convenience and toxicity , the effect of stable performance

Active Publication Date: 2015-03-25
深圳市富可森环保科技股份有限公司
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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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 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;

[0024] 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 neutralization pump, and the clarified liquid overflows ...

Embodiment 2

[0033] 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;

[0034] 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 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 c...

Embodiment 3

[0043] 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;

[0044] 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 a process for preparing a composite adsorption material capable of simultaneously absorbing heavy metal ions and volatile organic substances in waste gas. The process comprises the following steps: (1) pretreatment of carbon nanometer pipes; (2) preparation of calcium chloride; (3) loading of calcium chloride; and (4) preparation of composite adsorption material, namely obtaining of the graphene-calcium chloride-carbon nanometer pipe composite adsorption material. According to the process for preparing the composite adsorption material capable of simultaneously absorbing heavy metal ions and volatile organic substances in waste gas, the high-adsorption-capacity composite adsorption material capable of simultaneously absorbing heavy metal ions and volatile organic substances in waste gas, which has the characteristics of nanometer structure, stable properties, large specific surface area and special property of adsorbing heavy metals by calcium chloride, is obtained, can be used for treatment of waste gas with high toxicity, low concentration and high fluidity, and has the advantages of short adsorption time and high adsorption efficiency.

Description

technical field [0001] The invention relates to a preparation method of a composite adsorption material 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30B01D53/02
CPCB01D53/02B01D2253/102B01D2253/112B01J20/046B01J20/20B01J20/205B01J2220/42B01J2220/4806
Inventor 张亦彬
Owner 深圳市富可森环保科技股份有限公司
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