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A sludge self-sustaining smoldering and high-temperature aerobic fermentation composite disposal process and equipment

An aerobic fermentation and sludge technology, applied in biological sludge treatment, lighting and heating equipment, sewage/sludge fertilizer, etc., can solve problems such as increased energy consumption, limited disposal capacity, and long cycle of biological treatment technology, achieving The effect of increasing the disposal rate, reducing the biological fermentation cycle, and reducing energy consumption

Active Publication Date: 2021-06-11
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, biological treatment technology often has a long cycle and limited disposal capacity
[0006] In recent years, the technology of using thermophilic bacteria to realize high-temperature aerobic fermentation and composting of sludge can greatly shorten the composting cycle. Traditional biological fermentation methods also need to increase energy consumption

Method used

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  • A sludge self-sustaining smoldering and high-temperature aerobic fermentation composite disposal process and equipment
  • A sludge self-sustaining smoldering and high-temperature aerobic fermentation composite disposal process and equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0057] (1) Divert the introduced sludge, a part of it is fully mixed with sand at a weight ratio of 1:4.5, and the mixed material is sent to a predetermined smoldering device for accumulation; the other part of the sludge is fully mixed with the thermophilic fermentation bacterial seed liquid Then it is sent to the predetermined fermentation position to be fermented;

[0058] (2) After the mixed material has accumulated to a predetermined height, the smoldering device is preheated and heated. When the temperature of the bottom mixed material rises to 250°C, air is introduced so that the Darcy flow rate of the air in the smoldering device is 3.3cm / s, and the mixed material The sludge in it starts to smolder;

[0059] (3) Collect and store the heat generated during the continuous self-sustaining smoldering process of sludge;

[0060] (4) Prepare the stored heat and transport it to the predetermined fermentation position for heating, so that the fermentation temperature is maint...

Embodiment example 2

[0063] (1) Divert the introduced sludge, a part of it is fully mixed with sand in a weight ratio of 1:9, and the mixed material is sent to a predetermined smoldering device for accumulation; the other part of the sludge is fully mixed with the thermophilic fermentation bacterial seed liquid Then it is sent to the predetermined fermentation position to be fermented;

[0064] (2) After the mixed material has accumulated to a predetermined height, the smoldering device is preheated and heated. When the temperature of the bottom mixed material rises to 300°C, air is introduced so that the Darcy flow rate of the air in the smoldering device is 4.5cm / s, and the mixed material The sludge in it starts to smolder;

[0065] (3) Collect and store the heat generated during the continuous self-sustaining smoldering process of sludge;

[0066] (4) Prepare the stored heat and transport it to the predetermined fermentation position for heating, so that the fermentation temperature is maintai...

Embodiment example 3

[0069] (1) Divide the introduced sludge, a part of it is fully mixed with sand at a weight ratio of 1:5, and the mixed material is sent to a predetermined smoldering device for accumulation; the other part of the sludge is fully mixed with the thermophilic fermentation bacterial seed liquid Then it is sent to the predetermined fermentation position to be fermented;

[0070] (2) After the mixed material has accumulated to a predetermined height, the smoldering device is preheated and heated up. When the temperature of the bottom mixed material rises to 250°C, air is introduced so that the Darcy flow rate of the air in the smoldering device is 6.0cm / s, and the mixed material The sludge in it starts to smolder;

[0071] (3) Collect and store the heat generated during the continuous self-sustaining smoldering process of sludge;

[0072] (4) Prepare the stored heat and transport it to the predetermined fermentation position for heating, so that the fermentation temperature is main...

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Abstract

The invention discloses a sludge self-sustaining smoldering and aerobic biological fermentation compound disposal process and equipment, which belongs to the related technical process in the field of domestic waste disposal, and is mainly aimed at the non-toxic treatment of municipal sludge and other organic wastes with high moisture content and low calorific value. Disposal of harmful resources. The feature of the process is that by combining the two disposal technologies of self-sustaining smoldering and aerobic fermentation composting, the sludge disposal capacity can be improved, the energy consumption of the aerobic biological fermentation process can be reduced, and the advantages of the technologies can be complemented; the sludge ash produced by smoldering and fermentation The generated organic fertilizer can be used in combination, so as to increase the sludge disposal rate, reduce the energy consumption of the sludge disposal system, reduce the biological fermentation cycle, and increase the diversity of sludge resource products.

Description

technical field [0001] The invention belongs to the category of municipal waste disposal, and relates to a sludge self-sustaining smoldering and high-temperature aerobic fermentation compound disposal process and equipment, more specifically, a process that combines self-sustaining smoldering and aerobic biological fermentation. The technology is aimed at the composite disposal process of municipal sludge and other organic wastes suitable for fermentation and composting process. Background technique [0002] At present, the urban sewage treatment capacity is rapidly increasing, and the sludge output is continuously rising. Sludge is rich in organic matter, perishable and smelly, and contains harmful substances such as bacterial eggs and pesticide residues. Improper disposal will cause pollution to the land, groundwater and air environment. [0003] The traditional sludge disposal methods are mainly heat treatment and biological treatment. [0004] Heat treatment can conver...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23G7/00F23G5/46C05F7/00C05F17/60C02F11/02
CPCC02F11/02C05F7/00F23G5/46F23G7/001F23G2206/20F23G2209/12Y02W30/40Y02A40/20
Inventor 冯超乔瑜成明凯高翔鹏徐明厚
Owner HUAZHONG UNIV OF SCI & TECH
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