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Self-sustaining smoldering and high-temperature aerobic fermentation composite disposal process and equipment for sludge

An aerobic fermentation and sludge technology, applied in biological sludge treatment, lighting and heating equipment, sewage/sludge fertilizer, etc. The effect of reducing biological fermentation cycle, increasing disposal rate and reducing energy consumption

Active Publication Date: 2020-07-17
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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  • Self-sustaining smoldering and high-temperature aerobic fermentation composite disposal process and equipment for sludge
  • Self-sustaining smoldering and high-temperature aerobic fermentation composite disposal process and equipment for sludge

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 self-sustaining smoldering and aerobic biological fermentation composite disposal process and equipment for sludge, belongs to related technical processes in the field of domestic waste disposal, and mainly aims at harmless resource disposal of the municipal sludge and other high-water-content low-calorific-value organic wastes. The self-sustaining smoldering and aerobicbiological fermentation composite disposal process for the sludge is characterized in that two disposal technologies of self-sustaining smoldering and aerobic fermentation composting are combined, sothat the sludge disposal capacity is improved, the energy consumption in the aerobic biological fermentation process is reduced and advantage complementation among the technologies is realized; and sludge ashes generated by smoldering and organic fertilizers generated by fermentation can be combined for use, so that the sludge disposal rate is increased, meanwhile, the energy consumption of a sludge disposal system is reduced, the biological fermentation period is shortened, and the diversity of sludge resource products is improved.

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 Applications(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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