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Method for preparing carbon materials by use of sludge

A carbon material and sludge technology, which is applied in the field of sludge preparation of carbon materials

Active Publication Date: 2013-11-20
中科核润(陕西)生态环境有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] It can be seen that the existing sludge dewatering technology mainly focuses on the high-efficiency dehydration faced in the resource utilization process of high-water sludge, and the obtained mud cake is mainly used for solid fuel, agricultural fertilizer and incineration. Pyrolysis and carbonization of sludge as biochar or further processing and modification for reuse in sewage treatment plants

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  • Method for preparing carbon materials by use of sludge
  • Method for preparing carbon materials by use of sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1: Preparation of carbon materials from sludge

[0039] Such as figure 1 As shown, the sludge from the urban domestic sewage treatment plant with a moisture content of 80%-90% is pumped into the regulating preheating storage tank (Beijing Institute of Mechanical and Electrical Engineering High-Tech Co., Ltd.), and the hydrothermal reactor (Beijing The exhausted steam discharged from Beijing Institute of Mechanical and Electrical Engineering High-Tech Co., Ltd.) is preheated by direct or indirect heat exchange, and the obtained preheated sludge is poured into the hydrothermal reactor (Beijing Institute of Mechanical and Electrical Engineering High-Tech Co., Ltd.), and 160~300 ℃ saturated steam to 1.5-9.5MPa pressure for 30min-90min, the viscous organic matter in the sludge is hydrolyzed, the colloidal structure and cell membrane wall of the sludge are destroyed, and the bound water and solid particles are effectively separated, and the obtained liquid mud-wat...

Embodiment 2

[0040] Example 2: Preparation of adsorption carbon material from sludge

[0041] Such as figure 1 As shown, the sludge from the urban domestic sewage treatment plant with a moisture content of 80%-90% is pumped into the regulating preheating storage tank (Beijing Institute of Mechanical and Electrical Engineering High-Tech Co., Ltd.), and the hydrothermal reactor (Beijing The exhausted steam discharged from Beijing Institute of Mechanical and Electrical Engineering High-Tech Co., Ltd.) is preheated by direct or indirect heat exchange, and the obtained preheated sludge is poured into the hydrothermal reactor (Beijing Institute of Mechanical and Electrical Engineering High-Tech Co., Ltd.), and 160~300 ℃ saturated steam to a certain pressure (1.5-9.5MPa) and stir for a certain period of time (30min-90min), hydrolyze the viscous organic matter in the sludge, destroy the colloidal structure of the sludge and the cell membrane wall, and promote the effective binding of water and...

Embodiment 3

[0043] Example 3: Biogas production from sludge

[0044] Such as figure 1 As shown, the sludge from the industrial sewage treatment plant, the sludge with a moisture content of 80%-90% is pumped into the regulating preheating storage tank (Beijing Institute of Mechanical and Electrical Engineering High-Tech Co., Ltd.), and the hydrothermal reactor (Beijing Institute of Mechanical and Electrical Engineering High-Tech Co., Ltd.) exhausted steam is preheated by direct or indirect heat exchange, and the resulting preheated sludge is put into the hydrothermal reactor (Beijing Institute of Mechanical and Electrical Engineering High-Tech Co., Ltd.), and passed through 160 ~300℃ saturated steam to a certain pressure (1.5-9.5MPa) for a certain period of time (30min-90min) to hydrolyze the viscous organic matter in the sludge, destroy the colloidal structure and cell membrane wall of the sludge, and promote the binding of water and solids The particles are effectively separated, an...

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Abstract

The invention provides a method for preparing carbon materials by use of sludge. The method comprises the following steps: preheating of high-water-content sludge to obtain preheated sludge; primary separation of water and solid particles: viscous organic matters in the preheated sludge are hydrolyzed, colloid structures and cell membrane walls of the sludge are destroyed, so that the bound water and the solid particles can be effectively separated; secondary separation of the water and the solid particles; dewatering to obtain dewatered sludge with the water content down to about 40%; and carbonization: preparation of biological carbon. The method also comprises further modification treatment of the biological carbon to prepare adsorption carbon materials. The method also comprises anaerobic fermentation of the dewatered sludge to produce biogas. The adsorption carbon materials prepared by the method can be recycled to a wastewater treatment plant for the adsorption of heavy metals, nitrogen and phosphorus and the organic matters in sewage, and cyclic utilization of the sludge in the wastewater treatment plant can be realized; and the combustible gas generated in the process can be used as a supplementary fuel of a pyrolysis carbonization furnace. The method has the advantages of cyclic utilization, recycle of waste materials and ecological environmental friendliness.

Description

technical field [0001] The invention relates to the technical field of environmental protection solid waste treatment, in particular to a method for preparing carbon materials from sludge. Background technique [0002] Hydrothermal drying technology is a non-evaporative dehydration technology that has developed rapidly in recent years. The principle is to hydrolyze the viscous organic matter in the sludge and destroy the colloidal structure of the sludge bacteria micelles through the action of saturated steam at high temperature and high pressure (such as 160~200℃, 2MPa), which can improve the dehydration performance and anaerobic digestion performance at the same time. In addition, the protein in the sludge can be decomposed under high temperature, the cells will rupture, and the water in the cells will be released. After hydrothermal treatment, without adding flocculant, the water content of the sludge can be greatly reduced to below 50% by using mechanical dehydration te...

Claims

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Application Information

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IPC IPC(8): C10B53/02C10B53/08C02F11/10C02F11/12B01J20/20C02F1/28C05D9/00C09K17/04
CPCY02E50/14Y02E50/10Y02W10/40
Inventor 汪印张耿崚王兴栋蔡超黄青邢贞娇康虞玲陈少华
Owner 中科核润(陕西)生态环境有限公司
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