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Heterogeneous coagulation adsorbent for heavy metal adsorption and its preparation method and application

A technology for adsorbents and heavy metals, applied in the field of heterogeneous coagulation adsorbents and their preparation, to achieve strong adaptability, improve removal efficiency, and improve solubility

Active Publication Date: 2020-08-14
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

All these have brought great challenges to the emission control and coordinated removal of heavy metals from coal-fired power plants in my country.

Method used

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  • Heterogeneous coagulation adsorbent for heavy metal adsorption and its preparation method and application
  • Heterogeneous coagulation adsorbent for heavy metal adsorption and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Prepare a heterogeneous coagulation and adsorbent, which includes 0.01% polyacrylamide, 0.0005% calcium chloride, 0.008% coconut oil fatty acid diethanolamide, and the balance is water;

[0033]The five-field fine ash of an electrostatic precipitator in a power plant is mixed with preheated air containing arsenic and selenium as a simulated flue gas into the reaction chamber, and the heterogeneous coagulated adsorbent is atomized into droplets with a particle size of 60 μm, and 1000kg The input amount of / h is sprayed into the reaction chamber, and the two interact in the simulated flue environment in the reaction chamber, and the residence time is about 3s. For capture, the cloth bag uses conventional chemical fiber filter material, and EPA29 is used to sample heavy metals at the rear outlet of the bag dust removal device to measure the concentration of heavy metal emissions;

[0034] The test results show that the emission concentration of heavy metals decreased signi...

Embodiment 2

[0036] Prepare a heterogeneous coagulation and adsorbent, which includes 0.005% polyacrylamide, 0.001% calcium chloride, 0.006% coconut oil fatty acid diethanolamide, and the balance is water;

[0037] The five-electric field fine ash of a power plant electrostatic precipitator is mixed with preheated air containing arsenic and selenium as simulated flue gas into the reaction chamber, and the heterogeneous coagulated adsorbent is atomized into droplets with a particle size of 55 μm, and 1100kg The input amount of / h is sprayed into the reaction chamber, and the two interact in the simulated flue environment in the reaction chamber, and the residence time is about 3s. For capture, the cloth bag uses conventional chemical fiber filter material, and EPA29 is used to sample heavy metals at the rear outlet of the bag dust removal device to measure the concentration of heavy metal emissions;

[0038] The test results show that the emission concentration of heavy metals decreased sig...

Embodiment 3

[0040] Prepare a heterogeneous coagulation and adsorbent, which includes 0.006% polyacrylamide, 0.0007% calcium chloride, 0.01% coconut oil fatty acid diethanolamide, and the balance is water;

[0041] The five-field fine ash of a power plant electrostatic precipitator is mixed with preheated air containing arsenic and selenium as simulated flue gas and passed into the reaction chamber, and the heterogeneous coagulated adsorbent is atomized into droplets with a particle size of 58 μm, and 1300kg The input amount of / h is sprayed into the reaction chamber, and the two interact in the simulated flue environment in the reaction chamber, and the residence time is about 3s. For capture, the cloth bag uses conventional chemical fiber filter material, and EPA29 is used to sample heavy metals at the rear outlet of the bag dust removal device to measure the concentration of heavy metal emissions;

[0042] The test results show that the emission concentration of heavy metals decreased s...

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Abstract

The invention belongs to the field of heavy metal adsorbents, and specifically discloses a heterogeneous condensation adsorbent for heavy metal adsorption, a preparation method and application thereof. The heterogeneous coagulation adsorbent comprises the following components in terms of mass percentage: 0.005% to 0.01% of polyacrylamide, 0.0005% to 0.001% of calcium chloride, 0.001% to 0.01% of coconut oil fatty acid diethanolamide, The balance is water. In the heterogeneous coagulation adsorbent provided by the present invention, calcium ions can promote the heterogeneous adsorption of gaseous heavy metals to be fixed on the heterogeneous coagulation adsorbent; at the same time, polyacrylamide dissolved in water can be absorbed between fine particles enriched in heavy metals Electrical neutralization occurs, and two or more particles are coagulated by "bridging" to improve the removal efficiency of fine particle heavy metals; in addition, coconut oil fatty acid diethanolamide can reduce the surface tension of water , thereby increasing the solubility of organic compounds.

Description

technical field [0001] The invention belongs to the field of heavy metal adsorbents, and more specifically relates to a heterogeneous coagulated adsorbent for heavy metal adsorption and a preparation method and application thereof. Background technique [0002] my country is currently the largest coal producer and consumer in the world, but there are various types of power coal in my country, rich in various heavy metals, among which the average content of arsenic, selenium, and lead is 3.8 μg / g, 2.8 μg / g, and 16.9 μg / g, respectively. g. At the same time, because high-heavy metal coal (more than 2 times the average value) covers nine major coal production areas, accounting for 66% of the country's total coal, coal combustion is the main source of atmospheric fine particle pollution. [0003] Fine particles in the atmosphere are usually enriched with a large amount of toxic trace heavy metals, and are easily inhaled by the human body, seriously endangering human health. Due ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D51/02C02F101/20
CPCC02F1/00C02F1/5209C02F1/281C02F1/66B01J20/22C02F2001/007C02F2101/20B01J20/3028B01J20/28014B01J20/3085B01J20/261B01D53/10B01D2253/202B01D2257/60B01D2258/0283B01D2253/112B01D2253/20B01D53/02
Inventor 赵永椿崔向峥周煜明张军营
Owner HUAZHONG UNIV OF SCI & TECH
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