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Biomass coal-water slurry prepared by waste leachate and domestic sludge and preparation process thereof

A technology for landfill leachate and domestic sludge, applied in the field of coal-water slurry, can solve the problems of failure of the treatment system, high investment and operation costs, and overall urban pollution, so as to reduce the difficulty and pressure of treatment, solve the problem of raw materials for production, and reduce The effect of production costs

Active Publication Date: 2009-12-16
珠海中水环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the investment and operation cost of treating landfill leachate is extremely high
On the other hand, due to the low BOD / COD ratio in landfill leachate, the biodegradability is poor, and the biological treatment efficiency is not high
After the landfill has been filled for a certain period of time, the water quality of the landfill leachate will change greatly, the biodegradability of the leachate will become worse, and the COD concentration will be higher. In this case, biological bacteria cannot adapt, and eventually lead to the death of all, the complete failure of the entire processing system
During the rainy season, a large amount of leachate from the landfill is discharged into the urban pipe network, causing serious pollution to the city as a whole
[0005] In 2008, the country revised the standards for landfills, requiring the leachate discharge concentration to be below 100mg / L, which increased the investment and operating costs of landfill leachate.

Method used

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  • Biomass coal-water slurry prepared by waste leachate and domestic sludge and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The biomass coal-water slurry prepared from landfill leachate and domestic sludge of the present invention comprises the following components by weight percentage:

[0025] Coal 40% Domestic sludge 20%

[0026] Landfill leachate 39.7% additive 0.3%.

[0027] The preparation process of the biomass coal-water slurry prepared from the above-mentioned garbage leachate and domestic sludge is as follows: the above-mentioned percentage of coal and domestic sludge are transported to the feeding mechanism, and at the same time, the computer metering system is used to measure and add the garbage leachate After the liquid and additives are mixed with a drum mill for primary grinding and crushing, the additives are metered again for secondary grinding and crushing in a planetary mill, and then enter the homogenization tank. After homogenization, they are filtered through a filter. Finally, the finished coal water slurry is obtained and loaded into storage tanks.

[0028] The drum...

Embodiment 2

[0034] In the present embodiment, the biomass coal-water slurry prepared from the landfill leachate and domestic sludge comprises the following components by weight percentage:

[0035] Coal 42% Domestic sludge 18%

[0036] Landfill Leachate 20% Additive 0.4%

[0037] Domestic and industrial wastewater 19.6%.

[0038] Compared with Example 1, in this implementation, domestic and industrial wastewater is added as production supplementary water, and the domestic and industrial wastewater can be production flushing water, canteen wastewater, domestic sewage and rainwater.

[0039] The preparation process of the biomass coal-water slurry prepared from the above-mentioned garbage leachate and domestic sludge is as follows: the above-mentioned percentage of coal and domestic sludge are transported to the feeding mechanism, and at the same time, the computer metering system is used to measure and add the garbage leachate Liquid, domestic industrial wastewater and additives are mixe...

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Abstract

The invention discloses biomass coal-water slurry prepared by waste leachate and domestic sludge and a preparation process thereof, aiming to provide biomass coal-water slurry with low cost which combines the energy-saving and emission-reducing with environment management and a preparation method thereof. The invention adopts coal, domestic sludge, waste leachate and additives as raw materials to prepare the biomass coal-water slurry which can replace fuel for use by mixing, grinding, homogenizing and filtrating the raw materials, thus saving energy effectively, reducing cost greatly, realizing good management function on the urban environment and reaching the aims of promoting the economic and environmental health and sustainable development. The invention can be widely used in the fields of fuel replace burning for industrial boilers, power station boilers and industrial furnace, the field of urban environmental management and the like.

Description

technical field [0001] The invention relates to a coal water slurry, in particular to a biomass coal water slurry prepared from landfill leachate and domestic sludge and a preparation process thereof. Background technique [0002] Coal water slurry is a new type of coal-based fluid fuel and an important branch of clean coal technology in the world today. Compared with traditional coal fuel, coal water slurry technology can make coal burn more fully and completely, so it has low pollution , high efficiency, energy saving and low operating cost. The appearance of coal-water slurry is similar to heavy oil, and its composition is "coal + water + chemical additives". It has good stability and rheology, and is easy to load and unload, store, pipeline, and atomize and fluidize suspension combustion. Coal-water slurry combustion technology is a clean coal combustion technology, widely used in industrial boilers, power plant boilers, and industrial furnaces for oil-substituting comb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23K1/02
Inventor 张伟明
Owner 珠海中水环保科技有限公司
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