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Method for treating persistent organic pollutants

A technology of organic pollutants and persistence, applied in the field of environmental protection and persistent toxic pollutants treatment, to achieve good economic benefits, good ecological and environmental benefits, and continuous operation

Inactive Publication Date: 2010-12-22
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The inventors of the present application have found after long-term cross-field research that using the existing high-temperature liquid slagging gasification furnace widely used in the chemical industry can effectively treat persistent organic Pollutants, thus solving the big problem in the treatment of persistent organic pollutants

Method used

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  • Method for treating persistent organic pollutants
  • Method for treating persistent organic pollutants

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Experimental program
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Effect test

Embodiment 1

[0035] Waste power capacitors containing PCBs are pretreated to make them suitable for gasifier feed.

[0036] Mix the processed powder with qualified dry coal powder in an appropriate ratio, so that the melting and flow temperature of the molten slag corresponding to the blend is within the operating temperature range of the gasifier. In this embodiment, the powder containing PCBs is mixed with dry coal powder. The weight ratio of coal powder is 0.0001:100, and the slag melting temperature of the blend after mixing is about 1430°C.

[0037] The blend is sent to the gasifier through the burner of the gasifier with high-pressure N2 as the transport medium. Under the conditions of 1550 ° C and 2.5 MPa, it is mixed with O 2 Various conversion reactions occur with steam. The reacted synthesis gas is discharged from the upper part of the gasifier, and the high-temperature slag is discharged from the bottom of the gasifier.

[0038] It has been determined that the synthesis gas af...

Embodiment 2

[0042] The soil with high residual concentration of hexachlorobenzene (HCB) should be pretreated to make it suitable for gasifier feed.

[0043] The treated soil is mixed with qualified dry coal powder in an appropriate proportion, so that the molten slag melting flow temperature corresponding to the blend is within the operating temperature range of the gasifier. In this embodiment, the HCB-containing soil and dry The weight ratio of coal powder is 25:100, and the slag melting temperature of the blend after mixing is about 1410°C.

[0044] Blends with high pressure CO 2 As a conveying medium, it is sent to the gasification furnace through the burner of the gasification furnace. Under the conditions of 1500 ° C and 3.0 MPa, it is mixed with O 2 Various conversion reactions occur with steam. The reacted synthesis gas is discharged from the upper part of the gasifier, and the high-temperature slag is discharged from the bottom of the gasifier.

[0045] It has been determined ...

Embodiment 3

[0049] Waste transformers containing PCBs have undergone certain pretreatment to make them suitable for gasifier feed.

[0050] Mix the processed powder with qualified dry coal powder in an appropriate ratio, so that the melting and flow temperature of the molten slag corresponding to the blend is within the operating temperature range of the gasifier. In this embodiment, the powder containing PCBs and dry coal The weight ratio of the powder is 50:100, and the slag melting temperature of the blend after mixing is about 1450°C.

[0051] Blends with high pressure CO 2 As a conveying medium, it is sent to the gasifier through the burner of the gasifier. Under the conditions of 1550 ° C and 2.5 MPa, it is mixed with O 2 Various conversion reactions occur with steam. The reacted synthesis gas is discharged from the upper part of the gasifier, and the high-temperature slag is discharged from the bottom of the gasifier.

[0052] It has been determined that the synthesis gas after ...

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Abstract

The invention discloses a method for treating persistent organic pollutants (POPs). In the method, after liquid or powder POPs are mixed with conventional processing raw materials of a high-temperature liquid slagging gasifier, the mixture is treated by adopting the high-temperature liquid slagging gasifier. The method realizes the best combination of harmless treatment and resource utilization of the POPs under the condition of not changing process conditions of the gasifier fundamentally, and provides a novel green technical approach for treating the POPs.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and persistent toxic pollutant treatment, and specifically relates to a treatment method for persistent organic pollutants. Background technique [0002] In recent decades, the rapid development of the global industrialization process has brought material civilization to human society, and at the same time, it has caused a large amount of harmful waste to be discharged into the environment, especially persistent organic pollutants (Persistent Organic Pollutants, POPs) have become a threat to human survival The largest class of pollutants. Studies have shown that POPs can cause endocrine system disorders, reproductive and immune system damage, induce cancer, cause deformities, gene mutations and neurological diseases, etc., and stay in the human body for several generations, seriously threatening human survival, reproduction and sustainable development. [0003] POPs and other per...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00
Inventor 唐黎华宋丽芸黄敏朱子彬吴勇强倪燕慧
Owner EAST CHINA UNIV OF SCI & TECH