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Process and device for sludge pyrolysis

A sludge and pyrolysis technology, which can be used in combined devices, pyrolysis sludge treatment, dewatering/drying/concentrating sludge treatment, etc., can solve the problems of high water content, secondary pollution, secondary environmental pollution, etc. The effect of increasing furnace loading, high heating efficiency and increasing air permeability

Inactive Publication Date: 2013-12-25
JIANGSU ZHAOSHENG ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of my country's economy, the discharge of sewage is increasing, and the sewage treatment capacity and sewage treatment rate are also increasing. As a by-product of sewage treatment, sludge will cause serious secondary pollution if it is not treated in time.
Due to the large amount of sludge production, high water content, and a large amount of organic matter, germs, parasites, and heavy metals, if it is not handled properly, it will bring serious secondary pollution to the environment.
Traditional landfill, sludge composting, agricultural and sludge incineration and other sludge treatment methods can no longer meet the existing sludge treatment. According to the national policy of "harmless, resourceful, energy saving, low-carbon and environmental protection," , the resource utilization of sludge has become the most effective way to completely eradicate sludge

Method used

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  • Process and device for sludge pyrolysis
  • Process and device for sludge pyrolysis
  • Process and device for sludge pyrolysis

Examples

Experimental program
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Effect test

Embodiment 1

[0028] The sludge with a moisture content of 85% is added to wood chips, and the weight percentages of the two are: sludge with a moisture content of 85% is 85%, and wood chips are 15%; mix evenly in a mixer, and press filter in a crawler filter press to The moisture content is ≤50%, and made into strip-shaped sludge briquettes; the sludge briquettes are put into the hanging basket and put into the waste heat drying furnace. The pre-drying temperature is about 200°C. Pre-dried in a waste heat drying furnace until the moisture content is ≤10%, and then put it into the inner kettle of the carbonization furnace for carbonization. The furnace heating temperature of the carbonization furnace is 550°C; the gas generated by the carbonization is separated and purified by the purification system to become a Gas, wood vinegar, wood tar, the calorific value of the combustible gas can reach 4500 kcal, the combustible gas is transported to the burner, and is directly used for heating the re...

Embodiment 2

[0030]The sludge with a water content of 70% is added to the dry sludge granules, and the weight percentage of the two is: 80% of the sludge with a water content of 70%, and 20% of the dry sludge granules. Press filter in the filter until the water content is ≤50%, and make strip-shaped sludge briquettes; put the sludge briquettes into hanging baskets and put them into the waste heat drying furnace, and the pre-drying temperature is about 200°C , pre-dried in the waste heat drying furnace using the waste heat of the retort furnace to a moisture content of ≤10%, and then put it into the inner kettle of the retort furnace for retort distillation. The furnace heating temperature of the retort furnace is 500°C; Combustible gas, wood vinegar, and wood tar can be made from the separation and purification of the combustible gas. The calorific value of the combustible gas can reach 4500 kcal. The combustible gas is transported to the burner and directly used for heating the retort furn...

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Abstract

The invention relates to a process and device for sludge pyrolysis. The device is characterized by comprising a gas retort, a waste heat drying oven, a deodorization system, a purification system and a control system. A combustor is arranged on the lower portion of the hearth of the gas retort, and the hearth of the gas retort is connected with the waste heat drying oven. Wood chips or dry sludge particles are added to sludge to be mixed evenly, filter pressing is carried out, and sludge pressing blocks are manufactured. The sludge pressing blocks are pre-dried in the waste heat drying oven, and are contained in the inner kettle of the gas retort for carbonization, gas generated by the carbonization is separated by the purification system, and combustible gas is manufactured for heating the gas retort. Destructive distillation solid residues are used for the filtering and deodorization of combustion tail gas in the gas retort. A low-temperature carbonization technology is adopted, harmless utilization and recycling utilization are carried out on the sludge, the combustible gas generated in the low-temperature carbonization process can be used for heating the gas retort, resources are cyclically utilized and recycled, energy consumption in sludge treatment is reduced, the pollution of the sludge treatment on environment is reduced, secondary products with a high added-value are produced, and economic benefits and social benefits are achieved.

Description

technical field [0001] The invention relates to a sludge sewage treatment process and device, in particular to a sludge pyrolysis process and device. Background technique [0002] With the rapid development of my country's economy, the discharge of sewage is increasing, and the sewage treatment capacity and sewage treatment rate are also increasing. Sludge, as a by-product of sewage treatment, will cause serious secondary pollution if it is not treated in time. Due to the large amount of sludge production, high water content, and a large amount of organic matter, germs, parasites, and heavy metals, if improperly disposed of, it will bring serious secondary pollution to the environment. Traditional landfill, sludge composting, agricultural and sludge incineration and other sludge treatment methods can no longer meet the existing sludge treatment. According to the national policy of "harmless, resourceful, energy saving, low-carbon and environmental protection," , the resourc...

Claims

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Application Information

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IPC IPC(8): C02F11/10C02F11/12C10B53/00C10B1/00C10B53/08C10B57/10C10B57/04B01D53/04B01D53/18B01D50/00
CPCY02P20/129Y02W10/40
Inventor 周兆华李庚承王增华周震球尹曙辉
Owner JIANGSU ZHAOSHENG ENVIRONMENTAL PROTECTION TECH CO LTD
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