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Method for treating landfill leachate and application of method in preparation of derived fuel

A technology of landfill leachate and a treatment method, which is applied in the application fields of landfill leachate treatment and derivative fuel preparation, can solve the problems of high landfill leachate treatment cost, reduced system thermal efficiency, complicated treatment procedures, etc., and achieves high efficiency and low cost. The effect of processing, improving processing efficiency, and reducing processing costs

Active Publication Date: 2019-09-24
四川能投节能环保投资有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When landfill leachate is treated by ultrafiltration, nanofiltration and reverse osmosis, a large amount of concentrated liquid that cannot pass through the filter membrane will be produced. The concentrated liquid accounts for 40-60% of the weight of landfill leachate. The existing process enriches this part with organic components The concentrated liquid is sprayed into the incineration furnace for incineration. Due to the high water content of the concentrated liquid, the furnace needs to provide a large amount of heat to evaporate the water and then burn the organic components. This will not only reduce the thermal efficiency of the system, but also cause serious corrosion to the furnace.
[0004] The above-mentioned landfill leachate treatment process is complicated, inefficient, and energy-consuming. One ton of landfill leachate requires about 600,000 kcal of heat to incinerate, resulting in high cost of landfill leachate treatment.

Method used

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  • Method for treating landfill leachate and application of method in preparation of derived fuel
  • Method for treating landfill leachate and application of method in preparation of derived fuel
  • Method for treating landfill leachate and application of method in preparation of derived fuel

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Effect test

Embodiment 1

[0052] Such as figure 1 Shown, a kind of landfill leachate processing method of the present invention comprises the following steps:

[0053] a. Spray the landfill leachate produced by the fermentation of the original garbage on the garbage that has been treated by the fermentation;

[0054] b. Use hot air at 70-110°C to dry and remove water after spraying landfill leachate;

[0055] c. The hot air after the drying process contains a large amount of water and some volatile substances. After the waste gas is discharged, it first enters the condenser to condense the water in the waste gas. The cold source adopts circulating cooling water, and the condensed water enters the sewage treatment device 102 for treatment. Standard discharge, the exhaust gas after condensing and dewatering enters the exhaust gas combustion treatment device for combustion, removes the volatile substances in the exhaust gas, and the burned flue gas enters the flue gas purification device for treatment an...

Embodiment 2

[0058] Such as figure 1 Shown, a kind of landfill leachate processing method of the present invention comprises the following steps:

[0059] a. Spray the landfill leachate produced by the fermentation of the original garbage on the garbage that has been treated by the fermentation;

[0060] b. Use hot air at 70-110°C to dry and remove water after spraying landfill leachate;

[0061] c. The hot air after the drying process contains a large amount of water and some volatile substances. After the waste gas is discharged, it first enters the condenser to condense the water in the waste gas. The cold source adopts circulating cooling water, and the condensed water enters the sewage treatment device 102 for treatment. Standard discharge, the exhaust gas after condensing and dewatering enters the exhaust gas combustion treatment device for combustion, removes the volatile substances in the exhaust gas, and the burned flue gas enters the flue gas purification device for treatment an...

Embodiment 3

[0070] Such as figure 2 , 3 As shown, a drying machine includes a drying box 1 and a heat exchanger 2, the drying box 1 is a micro-negative pressure closed box, and the top plate 11 of the drying box 1 is provided with a garbage feeding port 3 , the bottom plate 12 is provided with a garbage discharge port 4, and the drying box between the garbage feeding port 3 and the garbage discharge port 4 is provided with a garbage conveying device 5, and several gas nozzles are also arranged on the bottom plate 12 of the drying box body 13. The gas nozzle 13 is connected to the heat exchanger 2 through the intake pipe 14, and the exhaust port is provided on the top plate 11 of the drying box, and the exhaust port is connected to the condenser through the exhaust pipe, and the landfill leachate is also provided on the top plate 11 Spray head 6 , the landfill leachate spray head 6 is connected with a landfill leachate collection tank 62 through a conduit 61 .

[0071] Described refuse ...

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Abstract

The invention discloses a method for treating landfill leachate. The method comprises the following steps: (1) performing pile fermentation, sorting and crushing on waste, spraying the landfill leachate to the treated waste; and (2) drying the waste obtained after spraying of the landfill leachate so as to remove water. Through the method for treating the landfill leachate, the efficiency is high, the cost is significantly lower than that of an existing treatment process, and the invention also discloses application of the landfill leachate treatment method in preparation of waste-derived fuel.

Description

technical field [0001] The invention relates to the field of garbage treatment, in particular to a treatment method for landfill leachate and its application in the preparation of derived fuels. Background technique [0002] During the process of stacking and landfilling domestic waste, due to biochemical degradation such as compaction and fermentation, a high-concentration organic component liquid will be produced, which we call landfill leachate, also known as leachate. There are many factors that affect the generation of landfill leachate. The highest concentration of CODcr and BOD5 in landfill leachate can reach thousands to tens of thousands. It can be directly discharged into urban sewage treatment pipes. [0003] At present, for garbage treatment plants, the usual treatment method for the landfill leachate produced by garbage composting fermentation is: the landfill leachate is treated by anaerobic fermentation and aerobic fermentation in sequence, and then passed th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L5/46C02F11/13F23G7/06B09B3/00B09B5/00
CPCC10L5/46C02F11/13F23G7/06B09B3/00B09B5/00B09B2101/02Y02E50/30
Inventor 张云月马强明勇常博
Owner 四川能投节能环保投资有限公司