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Sludge treatment method

A technology for sludge and sludge granules, applied in pyrolysis treatment of sludge, combustion methods, energy and wastewater treatment, etc., can solve problems such as wasting energy and polluting the environment, and achieve low operating costs, prevention of secondary pollution, and economic benefits. Good results

Inactive Publication Date: 2010-08-18
江苏展宏环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Nowadays, it is very common for farmers to burn straw in the open air, which not only wastes energy, but also pollutes the environment.

Method used

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Examples

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Comparison scheme
Effect test

Embodiment 1

[0023] 100kg of sludge with a moisture content of 75% is transported to the sludge mixer, and 30kg of desiccant is added. The weight ratio of the desiccant is 17kg of straw, 13kg of quicklime, and stirred for 1.5 hours. The sludge undergoes a chemical reaction and is granulated by sludge extrusion. Squeeze and dry by machine to form long cylindrical sludge particles with a diameter of 32mm, a length of 45mm, and a moisture content of 57%. The sludge particles are transported to the solar drying warehouse and dried at a temperature of 40°C Deodorization and disinfection; when the moisture content of the sludge particles drops to 20%, send them to the incinerator for full combustion, the temperature can reach 750°C, and discharge the residual waste residue after combustion; or use the residual waste residue as the raw material for cement plant production ; or directly made into unburned bricks; or used as potash fertilizer raw material for fertilizer plants.

Embodiment 2

[0025] 100kg of sludge with a water content of 80% is transported to the sludge mixer, and 25kg of desiccant is added. The weight ratio of the desiccant is 15kg of straw, 10kg of quicklime, and stirred for 1 hour. The sludge undergoes a chemical reaction and is granulated by sludge extrusion. Squeeze and dry by machine to form long cylindrical sludge particles with a diameter of 30mm, a length of 40mm, and a moisture content of 58%. The sludge particles are transported to the solar drying warehouse and dried at a temperature of 60°C Deodorization and disinfection; when the moisture content of the sludge particles drops to 25%, send them to the incinerator for full combustion, the temperature can reach 720°C, and discharge the residual waste residue after combustion; or use the residual waste residue as the raw material for cement plant production ; or directly made into unburned bricks; or used as potash fertilizer raw material for fertilizer plants.

Embodiment 3

[0027] 100kg of sludge with a moisture content of 82% is transported to the sludge mixer, and 10kg of desiccant is added. The weight ratio of the desiccant is 8kg of straw, 2kg of quicklime, and stirred for 2 hours. The sludge undergoes a chemical reaction and is granulated by sludge extrusion. Squeeze and dry by machine to form long cylindrical sludge particles with a diameter of 35mm, a length of 55mm, and a moisture content of 60%. The sludge particles are transported to the solar drying warehouse and dried at a temperature of 80°C Deodorization and disinfection; when the moisture content of the sludge particles drops to 30%, send them to the incinerator for full combustion, the temperature can reach 500°C, and discharge the residual waste residue after combustion; or use the residual waste residue as the raw material for cement plant production ; or directly made into unburned bricks; or used as potash fertilizer raw material for fertilizer plants.

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Abstract

The invention relates to a sludge treatment method. Firstly, sludge with moisture content of 75-82% is conveyed into a sludge stirring machine by a belt press filter; secondly, drying agent is added into the sludge stirring machine, and stirring mixing is carried out; a hoisting machine is utilized to hoist mixture into a sludge pellet extruder, the sludge pellet extruder carries out extrusion conveying on the mixture, thus forming strip cylindrical sludge particles with moisture content of 50-60%; then the sludge particles are collected into a horseshoe shape solar drying storehouse, ammonia gas is guided in, deodorization drying is carried out at the temperature of 40-60 DEG C, so that moisture content of sludge particle is reduced to 20-30%; and finally the treated sludge particle is conveyed into an incinerator to be fully combusted, combustion temperature can reach 500-800 DEG C, and the residue after combustion is discharged. The sludge treatment method disclosed by the invention realizes reduction, harmlessness, stabilization and reclamation of sludge treatment and can obtain higher social benefit and economic benefit.

Description

technical field [0001] The invention relates to a method for environmental protection, in particular to a method for treating sludge. Background technique [0002] The drying treatment of sludge can significantly reduce the volume of sludge, and the volume can be compressed to 1 / 4-1 / 5 of the original. The sludge product after drying treatment has stable performance, odorless, and no pathogenic organisms. It can be used as fertilizer, soil conditioner, etc., or alternative energy use. As early as the 1940s, Japan, Europe and the United States have used direct heating drum dryers to dry sludge. After decades of development, the advantages of sludge drying technology are gradually emerging. However, due to the high requirements for sludge drying technology, high processing costs and complicated management, this technology was not promoted in western developed countries until the successful application in Sweden and other countries in the late 1980s. [0003] Among the existin...

Claims

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Application Information

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IPC IPC(8): C02F11/10F23G7/00
CPCY02W10/37
Inventor 袁国中曹秋萍陈云龙洪小平
Owner 江苏展宏环保科技有限公司
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