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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  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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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
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Example Embodiment

[0038] Example 1: Sludge preparation charcoal material

[0039] Such as figure 1 As shown, the sludge from a municipal sewage treatment plant with a moisture content of 80%-90% is pumped into a regulating preheating storage tank (Beijing Mechanical and Electrical Engineering Institute High Technology Co., Ltd.), and a hydrothermal reactor (Beijing The exhaust steam discharged from the Institute of Mechanical and Electrical Technology Co., Ltd. is preheated by direct or indirect heat exchange, and the resulting preheated sludge is pumped into the hydrothermal reactor (Beijing Institute of Mechanical and Electrical Engineering High-Tech Co., Ltd.), passing 160~300 The saturated steam at ℃ is stirred for 30min-90min under the pressure of 1.5-9.5MPa to hydrolyze the viscous organic matter in the sludge, destroy the colloidal structure and cell membrane wall of the sludge, and promote the effective separation of bound water and solid particles. The resulting liquid mud-water mixture...

Example Embodiment

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

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

Example Embodiment

[0043] Example 3: Biogas preparation from sludge

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

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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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