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Preparation method of combustible mud from urban sludge and firecoal

An urban sludge, coal-burning technology, applied in chemical instruments and methods, sludge treatment, water/sludge/sewage treatment, etc., can solve problems such as large heat consumption, limitation, insecurity, etc.

Inactive Publication Date: 2019-12-31
宋合富
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, drying the wet sludge requires a lot of heat energy, produces a lot of waste gas and waste water, and easily causes secondary pollution and unsafe factors to the surrounding environment.
And the sludge treatment system also needs to control the shape and size of the dried product, which limits the application of the above method

Method used

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  • Preparation method of combustible mud from urban sludge and firecoal
  • Preparation method of combustible mud from urban sludge and firecoal
  • Preparation method of combustible mud from urban sludge and firecoal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A method for preparing combustible sludge from municipal sludge and burning coal includes the following steps:

[0052] (1) Preparation of modified aqueous sludge

[0053] Mix municipal sludge with sludge modifier in a 200m3 storage tank. The sludge modifier includes hydrochloric acid, ammonia, sodium dodecylbenzene sulfonate and calcium hypochloride, and municipal sludge and dodecylbenzene The mass ratio of sodium sulfonate and calcium hypochloride is 100:1:0.1.

[0054] The constant temperature system is used to control the temperature in the tank at 15-20°C; the grouped mechanical shearing and stirring are used to ensure the formation of the sludge in the tank while the heavy metals separate and settle.

[0055] (2) Material handling

[0056] The fluid state of the modified water-containing sludge is transported to the ball mill, and the coal in the coal bunker (15%-18% of the total water received) is crushed into particles with a particle size of 1~5mm. The modified water-co...

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Abstract

The invention provides a preparation method of combustible mud from urban sludge and firecoal. The preparation method comprises the following steps: (1) mixing the urban sludge with a sludge modifier,and performing shearing stirring so as to obtain modified aqueous sludge; and (2) mixing the modified aqueous sludge with coal particles, and performing ball milling so as to obtain the combustible mud. Closed pipeline transportation is adopted during preparation and transportation, no wastewater or waste gas isgenerated, zero emission is achieved during production, and no secondary pollution toair, soil and groundwater is caused, so that the environmental-protection standards during sludge treatment are improved completely, and resource utilization is achieved; and when the preparation method is compared with a traditional drying treatment mode, no pressure filtration, drying and stirring are needed, and the combustible mud has no generation of hard precipitates and good fluidity afterstorage is performed for 90 days, and is suitable for screw pumping.

Description

Technical field [0001] The invention relates to the technical field of sludge treatment, in particular to a method for preparing combustible sludge from urban sludge and coal. Background technique [0002] Urban sludge in developed countries occupies a large proportion of agricultural utilization. my country’s sewage treatment has the phenomenon of mixed domestic and industrial sewage and high content of harmful substances. Therefore, my country’s urban sludge is not suitable for agricultural utilization. The treatment method with incineration as the core is currently the most thorough, fast and economical method for sludge disposal. It can carbonize all organic matter, minimize the volume of sludge, and at the same time convert the combustible energy in the sludge into electricity Or heat energy turns waste into treasure, so that sludge can be fully utilized. Although the one-time investment of sludge incineration is slightly higher, it has the irreplaceable advantages of some ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L5/00C10L5/46C02F11/00
CPCC02F11/00C10L5/00C10L5/46C10L2290/24C10L2290/28Y02E50/10Y02E50/30
Inventor 宋合富
Owner 宋合富
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