Refuse leachate collecting, conveying system for refuse incineration of electric power plant

Abstract

The invention discloses collection and delivery system of garbage seeping liquid in a garbage flaming electric power plant. One side of a garbage storage pit is provided with an underground liquor drainage channel, a walking platform is arranged on the underground liquor drainage channel, a liquor drainage fence is arranged on the pit wall of the garbage storage pit, and the liquor drainage fencedischarges the seeping liquid into the underground liquor drainage channel from the garbage storage pit. The underground liquor drainage channel is communicated with the ground through a block discharge in and out channel and is provided with an air regenerating device. A seeping liquid collection pool is communicated with the underground liquor drainage channel, a seeping liquid pump room separating from the seeping liquid collection pool is arranged near the seeping liquid collection pool, and a pipeline of a lifting pump is provided with a back purge mechanism preventing a water fetching head from being blocked. The lifting pump prevents the corrosion and the blocking, and the operation is reliable. The collection and delivery of the seeping liquid can not be the difficulty of troubling the garbage flaming power, the whole system can keep the stable and long-term operation, and avoid the garbage soaking in water for influencing the flaming effect.

Description

technical field [0001] The invention relates to a system for collecting and conveying leachate in a waste storage pit of a waste incineration power plant, and belongs to the technical field of waste power generation. Background technique [0002] With the rapid development of the economy, the sanitary incineration method of domestic waste has the characteristics of "reduction, harmlessness, and recycling", which has been widely recognized, and municipal solid waste incineration power plants have been built in China. Due to the common characteristics of high moisture content and high ash content in urban domestic waste in China, in waste incineration power plants, in order to increase the calorific value of waste (the calorific value can be increased by about 10% after dehydration), the waste must pass through 3 to 5 The storage period of 1 day is dehydrated before it is transported to the garbage incinerator by the grab bucket for incineration. Therefore, the national standa...

AI Technical Summary

Problems solved by technology

[0003] In the extremely deep garbage storage pit below +0.00 ground level, the main problems that have not been effectively solved so far are the clogging of the drainage outlet by debris, Inconvenient to clear blockage

This is due to the complex composition of the leachate, high corrosiveness, and the emission of CH 4 、H 2 Explosive gas such as S, and extremely toxic, the working environment of blockage removal is extremely harsh, which often poses a great threat to the personal safety of the blockage removal personnel, resulting in the failure of maintenance and removal personnel to reach the drain outlet in time to clear the blockage

At the same time, due to the high content of leachate ash, high viscosity, poor fluidity, and more suspended matter, it often accumulates in the flow channel after drainage to block the drainage ditch, and maintenance personnel often cannot reach the dredging in time

The result is that the garbage in the storage pit is soaked in the leachate, which affects the calorific value of the garbage.

[0004] It is also very difficult to lift and discharge leachate in deep pits of -8 to 15m below the +0.00 floor. Since there is no better way, it is usually to put the lifting equipment (delivery pump) into the deep pit to leachate. In the leachate, because the liquid is extremely corrosive and the amount of sludge is huge, the lifting equipment is often damaged due to corrosion, or cannot work normally due to blockage, so that the leachate cannot be discharged in the garbage storage pit, which seriously affects the effect of garbage incineration

At the same time, due to the presence of explosive gas in the leachate, there are hidden dangers that endanger the safety of facilities and personnel.

Images