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Method used for flue gas denitration with pyrolysis acid pickling sludge

A technology of pickling sludge and pyrolysis, which is applied in separation methods, chemical instruments and methods, gas treatment, etc., to achieve the effect of solving treatment problems, simple operation and low investment cost

Active Publication Date: 2019-11-19
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The quality of carbon powder must be more efficient until saturated

Method used

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  • Method used for flue gas denitration with pyrolysis acid pickling sludge

Examples

Experimental program
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Effect test

Embodiment 1

[0024] In flue gas conditions of 1000ppmNO, 1%O 2 , N 2 For balance gas, when the total gas flow rate is 450ml / min, and the temperature condition is 600°C, 1g of carbon powder is added to a tube furnace with a diameter of 3cm, and the denitrification rate reaches 98.5%.

Embodiment 2

[0026] In flue gas conditions of 1000ppmNO, 1%O 2 , N 2 For balance gas, when the total gas flow rate is 450ml / min, and the temperature condition is 700°C, 1g of carbon powder is added to a tube furnace with a diameter of 3cm, and the denitrification rate reaches 96.0%.

Embodiment 3

[0028] In flue gas conditions of 1000ppmNO, 1%O 2 , N 2 For balance gas, when the total gas flow rate is 450ml / min, and the temperature condition is 800°C, 1g of carbon powder is added to a tube furnace with a diameter of 3cm, and the denitrification rate reaches 95.1%.

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Abstract

The invention discloses a method used for flue gas denitration with pyrolysis acid pickling sludge, and belongs to the technical field of flue gas pollutant. According to the method, carbon powder obtained from pyrolysis acid pickling sludge is subjected to drying for 24 to 48h at 60 to 100 DEG C; at 600 to 900 DEG C, at oxygen concentration of 1 to 3%, the carbon powder is adopted for NOx removing. According to the method, the carbon powder possesses extremely high adsorption capacity on low concentration NOx, so that the carbon powder is adopted as a reducing agent in reduction of NOx in flue gas, no expensive precious metal catalyst is needed, no catalyst poisoning is caused, and excellent NOx removing efficiency is achieved. The sludge processing and denitration technology are combined, resource utilization is realized, waste sludge is changed into valuables, resource energy is saved, the ecological environment is protected, and sustainable development is realized.

Description

technical field [0001] The invention belongs to the technical field of flue gas pollutant control, and in particular relates to a method for denitrification by using carbon powder obtained by pyrolyzing pickling sludge. Background technique [0002] The treatment and disposal of urban sludge is an important environmental problem facing the development of cities and towns in our country. With the destruction of the ecological environment, the state has introduced a series of environmental protection measures to promote the development of the urban sewage sludge disposal industry. According to the provisions of the Water Ten Articles, the harmless disposal rate of urban sludge above the prefecture level in my country must reach more than 90% by 2020, which puts forward new requirements for urban sewage sludge treatment technology. Pickling sludge is the solid waste produced by the treatment of pickling wastewater discharged from the metal surface treatment process. It contain...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/81B01D53/56B01D53/02B01J20/20B01J20/30
CPCB01D53/02B01D53/565B01D53/81B01D2258/0283B01J20/20B01J2220/4887
Inventor 王亚丽宋易徽崔素萍秦楠楠马晓宇兰明章
Owner BEIJING UNIV OF TECH
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