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Method and device for preventing scaling and blocking of garbage landfill site by utilizing slag and landfill gas

A landfill and landfill gas technology, applied in landfill technology, solid waste removal, waste fuel, etc., can solve the problem of low processing efficiency, high processing cost, and long processing time (it takes several weeks) To achieve the effect of reducing energy consumption, maintaining normal operation, and reducing the risk of fouling and clogging

Active Publication Date: 2018-08-17
PEKING UNIV SHENZHEN GRADUATE SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current processing methods have problems such as long time required (weeks to months), high processing costs, and low processing efficiency.

Method used

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  • Method and device for preventing scaling and blocking of garbage landfill site by utilizing slag and landfill gas
  • Method and device for preventing scaling and blocking of garbage landfill site by utilizing slag and landfill gas
  • Method and device for preventing scaling and blocking of garbage landfill site by utilizing slag and landfill gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A method for preventing scaling and clogging of landfills by using the above-mentioned device, such as figure 1 shown, including the following steps:

[0050] 1) The slag in the grate opening of the waste incinerator (see XRD for the slag before the reaction) Figure 4 ) is collected, and 50g of slag is taken to the treatment room, and the airtight treatment room is closed;

[0051] 2) The landfill gas composed of 60% methane and 40% carbon dioxide is transported to the treatment room through the intake pipeline, and the air guide pipes are evenly arranged on the bottom and both sides of the treatment room, and the intake flow rate is 50mL / min to ensure that the slag and landfill gas Fully contact for reaction, the reaction temperature is 35°C;

[0052] 3) Install a gas monitor at the exhaust port to monitor CO at any time 2 The CO concentration in the landfill gas enters the processing room through the circulation pump to continue processing. After 8 hours of reacti...

Embodiment 2

[0060] A method for preventing scaling and clogging of landfills by using the above-mentioned device, comprising the following steps:

[0061] 1) Collect the slag in the grate opening of the garbage incinerator, take 50g and fill it into the treatment room, and seal the treatment room;

[0062] 2) The landfill gas composed of 60% methane and 40% carbon dioxide is transported to the treatment room through the intake pipeline, and the air guide pipes are evenly arranged on the bottom and both sides of the treatment room, with a flow rate of 31.32mL / min to ensure sufficient slag and landfill gas Contact for reaction, the reaction temperature is 20°C;

[0063] 3) Install a gas monitor at the exhaust port to monitor CO at any time 2 Concentration, enter the treatment room through the circulation pump to continue processing, after 7 hours of reaction, the CO in the landfill gas 2 The concentration is 19.14% (lower than 20%), and the collected and reacted landfill gas is directly t...

Embodiment 3

[0070] A method for preventing scaling and clogging of landfills by using the above-mentioned device, comprising the following steps:

[0071] 1) Collect the slag in the grate opening of the garbage incinerator, take 50g of the slag to the treatment room, and seal the treatment room;

[0072] 2) The landfill gas composed of 60% methane and 40% carbon dioxide is transported to the treatment room through the intake pipeline, and the air guide pipes are evenly arranged on the bottom and both sides of the treatment room, and the intake flow rate is 50mL / min to ensure that the slag and landfill gas Fully contact for reaction, the reaction temperature is 30°C;

[0073] 3) Install a gas monitor at the exhaust port to monitor the CO2 concentration at any time, and enter the treatment room through the circulation pump to continue processing. After a reaction time of 8 hours, the CO2 concentration in the landfill gas is 19.2% (less than 20%). The landfill gas is directly transported to...

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Abstract

The invention discloses a method for preventing and controlling scaling and blocking of a garbage landfill site by utilizing slag and landfill gas. The method comprises the following steps that 1), slag is discharged into a treatment room, and the treatment room is sealed; 2), landfill gas reacts with the slag; 3), the landfill gas generated after the reaction is completed is collected when it isdetected that the CO2 concentration in the gas of a gas outlet is lower than 20%; and 4), the reacted slag is transported to the landfill site for landfill. The invention further discloses a device for preventing and controlling scaling and blocking of the garbage landfill site. The device comprises a treatment room, a discharging gate, a gas inlet, the gas outlet and a slag outlet. A gas monitoris arranged at the gas outlet, a landfill gas inlet pipeline is laid at the bottom of the treatment room, and the gas inlet is formed in the gas inlet pipeline. The method and device solve the problems of scaling and blockage caused by the mixed filling of the slag and domestic waste, the removal efficiency of CO2 is improved, the quality of the landfill gas is purified, the utilization efficiencyof the landfill gas is improved, and meanwhile recycling treatment of the incineration slag is carried out.

Description

technical field [0001] The invention relates to the technical field of garbage treatment, in particular to a method and a device for treating by-products of garbage incineration, slag, and byproducts of garbage landfills, landfill gas, to prevent scaling and clogging of garbage landfills. Background technique [0002] At present, the production of landfill gas is large in my country. Landfill gas refers to a complex mixed gas produced by microbial activities and other factors in landfills. The main component is CH 4 and CO 2 , trace components including H 2 O, H 2 S, N 2 Wait. where CH 4 50-65%, CO 2 Accounted for 30-40%. CH 4 Has a high calorific value (35.9MJ / m 3 ), which can be used as a new type of renewable energy for power generation, renewable energy production and combined heat and power generation. However, the main impurity component in landfill gas is CO 2 will greatly reduce the calorific value of landfill gas, so CO 2 The removal of CH can reduce the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B1/00B09B3/00
CPCB09B1/00B09B3/00Y02E50/30Y02W30/30
Inventor 徐期勇王前邵明帅吴华南
Owner PEKING UNIV SHENZHEN GRADUATE SCHOOL
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