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A method for preparing fuel from hydrothermal carbonization treatment sludge

A hydrothermal carbonization and sludge technology, which is applied in the pyrolysis treatment of sludge, water treatment parameter control, chemical instruments and methods, etc., can solve the problems of the current situation of treatment and disposal, and the short development time of hydrothermal carbonization technology.

Active Publication Date: 2022-06-28
北京顺鸿金建环境科技发展有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, although the sewage treatment rate has improved, the problem of "heavy sewage treatment and light sludge treatment" has not been well resolved: the current status of sludge treatment and disposal in sewage treatment plants in my country is worrying
However, the development time of hydrothermal carbonization technology is relatively short, and there is still a lot of room for improvement in terms of treatment efficiency, product moisture content, biochar performance, and waste heat utilization.

Method used

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  • A method for preparing fuel from hydrothermal carbonization treatment sludge
  • A method for preparing fuel from hydrothermal carbonization treatment sludge
  • A method for preparing fuel from hydrothermal carbonization treatment sludge

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Example 1 Sludge Treatment in Urban Domestic Sewage Plant

[0026] Sludge sample source: Yanzhou City Sewage Treatment Plant, domestic sewage sedimentation sludge with a moisture content of about 80%.

[0027] The processing process of the present invention:

[0028] a. Use closed screw to collect sludge;

[0029] b. The sludge is pumped to the reactor, during which 98% concentrated sulfuric acid 1% (v / v) is added and the sludge is preheated by the previous heat exchange system;

[0030] c. Carry out hydrothermal carbonization reaction in the reactor, the hydrothermal carbonization temperature is 180° C., the pressure is 25 bar, and the time is 120 minutes. When the reaction is carried out for about 30 minutes, 80% concentrated nitric acid 1% (v / v) is added to react. The pressure in the device is provided by the sludge pump;

[0031] d. Collect the generated bio-carbon slurry through the pressure relief system under the condition of ensuring the operating pressure of...

Embodiment 3

[0044] Example 3 Use of actual fuel

[0045] The solid fuel obtained by plate pressing and dehydration has low moisture content and inconspicuous odor, and is suitable for transportation and storage for a certain period of time. The fuel is used in a variety of small and medium-sized coal-fired boilers, and after proper adjustment, they can operate normally without abnormal failures.

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Abstract

The invention provides a method for preparing fuel from hydrothermal carbonization treatment sludge, which is characterized in that two kinds of acid catalysts are added in two steps, that is, concentrated sulfuric acid is added before entering the reactor, and sulfuric acid is added to the reactor during the reaction. concentrated nitric acid.

Description

technical field [0001] The invention relates to the field of urban domestic sewage treatment, and provides a method for preparing fuel by hydrothermal carbonization of sludge. Background technique [0002] Sludge absorbs many harmful substances in sewage and is a concentrated gathering place for pollutants. Sludge has the characteristics of high water content, easy corruption, odor, heavy metal content, and easy to cause carcinogenic, teratogenic and mutagenic. As an inevitable product of urban operation, the long-term existence of hidden dangers of sludge pollutes the environment and seriously threatens people's health. [0003] my country's sewage treatment industry started with the reform and opening up, has a short history, and is constrained by the level of economic development and the weak awareness of environmental protection. In recent years, although the sewage treatment rate has improved, the problem of "heavy sewage treatment, but light sludge treatment" has not...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/10C10L5/48C10L9/08
CPCC10L5/48C10L9/086C02F11/10C02F2209/02C02F2209/03C02F2209/44C10L2290/06C10L2290/02Y02E50/30
Inventor 张镭高玉君王建宏周业剑唐军义施耐德克劳迪娅马克布特曼
Owner 北京顺鸿金建环境科技发展有限公司