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Method and device for treating waste gas and remediating soil by comprehensively utilizing agricultural wastes

A technology for agricultural waste and soil remediation, which is applied in the field of comprehensive utilization of agricultural waste for waste gas treatment and soil remediation, can solve problems such as air pollution, impact on removal efficiency, and increase in investment and operation costs, and achieves solutions to rural environmental pollution and atmospheric environment. Effects of pollution problems

Pending Publication Date: 2021-01-29
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These technologies are widely used in power plants, boiler combustion, waste incineration and other industries, but their removal efficiency is affected by flue gas temperature, flow field, concentration and other conditions, and the addition of catalysts is also likely to increase investment and operation costs, and has disadvantages such as secondary pollution
[0005] my country is a large agricultural production country. The by-products of agricultural and forestry products, such as straw, wood chips, and sawdust, have a large output. Direct incineration and other treatment methods not only cause a huge waste of biomass resources, but also cause air pollution.

Method used

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  • Method and device for treating waste gas and remediating soil by comprehensively utilizing agricultural wastes
  • Method and device for treating waste gas and remediating soil by comprehensively utilizing agricultural wastes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052]The straw is soaked in an alkaline activator for alkalization, and the soaking time is 6 hours; after soaking, the straw is put into a high-temperature reactor for pyrolysis and carbonization, and the temperature for pyrolysis and carbonization is 450°C.

[0053]The activated carbon obtained by carbonization is adsorbed with the exhaust gas, and the SO in the exhaust gas2The mass percentage of NO is 10%, the mass percentage of NO is 1‰, SO3The mass percentage content is 10%, NO2The mass percentage content is 0.5‰;

[0054]20 parts of activated carbon after adsorption saturation, pour into the compound solution of urea and ammonium phosphate. The compound solutions of urea and ammonium phosphate are urea aqueous solution and ammonium phosphate aqueous solution respectively. The mass concentration of urea solution is 1%, and the ammonium phosphate The mass concentration of the solution is 5%, and then 20 parts of bentonite and 20 parts of calcium sulfate are added, stirred and dried t...

Embodiment 2

[0057]The straw is soaked in an alkaline activator for alkalization, and the soaking time is 8h; after soaking, the straw is put into a high-temperature reactor for pyrolysis and carbonization, and the carbonization temperature is 500°C.

[0058]Activated carbon obtained by carbonization and waste gas are adsorbed; SO in waste gas2The mass percentage of NO is 15%, the mass percentage of NO is 2‰, SO3The mass percentage content is 15%, NO2The mass percentage content is 1‰;

[0059]30 parts of activated carbon after adsorption saturation, pour into urea and ammonium phosphate compound solution. The urea and ammonium phosphate compound solutions are urea aqueous solution and ammonium phosphate aqueous solution respectively. The concentration of the urea solution is 1.5% and the ammonium phosphate solution The concentration is 6%, and then add 20 parts of bentonite and 20 parts of calcium sulfate, stir and dry to obtain fertilizer.

[0060]SO after exhaust gas is adsorbed2The mass percentage of ...

Embodiment 3

[0062]The straw is soaked in an alkaline activator for alkalization, and the soaking time is 10h; after soaking, the straw is put into a high-temperature reactor for pyrolysis and carbonization, and the carbonization temperature is 550°C.

[0063]Activated carbon obtained by carbonization and waste gas are adsorbed; SO in waste gas2The mass percentage of NO is 20%, the mass percentage of NO is 3‰, SO3The mass percentage content is 15%, NO2The mass percentage content is 2‰;

[0064]After adsorbing 40 parts of saturated activated carbon, pour it into the compound solution of ammonium chloride and calcium phosphate. The compound solution of urea and ammonium phosphate is an aqueous solution of urea and an aqueous solution of ammonium phosphate respectively. The concentration of the urea solution is 2%, and the concentration of phosphoric acid The concentration of the ammonium solution is 8%, then 30 parts of bentonite and 30 parts of calcium sulfate are added, stirred and dried to obtain fer...

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Abstract

The invention relates to a method and device for treating waste gas and remediating soil by comprehensively utilizing agricultural wastes. The device comprises a biomass charcoal preparation device, abiomass charcoal adsorption device and a biomass charcoal fertilizer preparation device, wherein the biomass charcoal preparation device is connected with the biomass charcoal adsorption device through a feeding pipeline, the feeding pipeline is communicated with a waste gas inlet pipe, a pipeline mixer is arranged on the feeding pipeline, the pipeline mixer is located at the downstream of the waste gas inlet pipe, a biomass charcoal adsorption interceptor is arranged in the biomass charcoal adsorption device, the biomass charcoal adsorption device is provided with an exhaust port, and a discharge port of the biomass charcoal adsorption device is connected with the biomass charcoal fertilizer preparation device. After the biomass charcoal prepared from the biomass raw materials adsorbs waste gas, the fertilizer is obtained through compounding, soil modification is facilitated, and reutilization of the biomass raw materials and treatment of the waste gas are achieved.

Description

Technical field[0001]The invention belongs to the technical field of agricultural engineering and environmental protection engineering, and specifically relates to a method and device for comprehensively utilizing agricultural wastes to process waste gas and repair soil.Background technique[0002]Disclosure of the background information is only intended to increase the understanding of the overall background of the present invention, and is not necessarily regarded as an acknowledgement or in any form suggesting that the information constitutes the prior art known to those of ordinary skill in the art.[0003]In recent years, with the sustained and rapid development of my country’s industrial economy, energy consumption has also increased year by year. Fossil fuels in industrial processes such as chemical industry and metal smelting have caused atmospheric nitrogen oxides (NOX) And sulfur oxides (SOX) Emissions are growing rapidly. NOXAnd SOXA large amount of emissions is the main fact...

Claims

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Application Information

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IPC IPC(8): C01B32/39C01B32/324C01B32/342C01B32/348B01D53/02C05G3/00C05G3/40
CPCB01D53/02B01D2253/102C05B7/00C05G3/00C01B32/324C01B32/342C01B32/348C01B32/39C05G3/40C05C9/00C05C11/00C05D3/00C05D9/00C05C3/00
Inventor 马乔苑仁晓王庆松袁学良罗从伟马春元
Owner SHANDONG UNIV
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