System for heating and unfreezing winter dump pit of garbage incineration power plant

Abstract

The invention relates to a system for heating and unfreezing a winter dump pit of a garbage incineration power plant. The system comprises a continuous blow-down flash tank, an intermittent blow-down flash tank, a blow-down cooling tank and the dump pit, wherein a continuous blow-down hole of a waste heat boiler is accessed to an inlet of the continuous blow-down flash tank; a dewatering hoe of the continuous blow-down flash tank and an intermittent blow-down hole of the waste heat boiler are connected to an inlet of the intermittent blow-down flash tank through a pipeline; an outlet drain of the intermittent blow-down flash tank is divided into three branch pipes through a tee joint, is separately connected to an inlet of the blow-down cooling tank and an unloading hall side of the dump pit, is connected to the blow-down cooling tank and the dump pit; and valves are arranged on all branch pipes. The system effectively heats and unfreezes introduced low-temperature garbage and improves the fermentation effect of the winter dump pit, so that a heat value of garbage in a furnace is increased, an auxiliary combustion system is avoided, and winter operation cost of the power plant is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of waste incineration power generation, and specifically relates to a winter garbage pit heating and thawing system of a waste incineration power station. Background technique [0002] After the garbage is transported into the waste incineration power plant, it needs to be put into the garbage pit for storage and fermentation for several days to increase the calorific value of the garbage entering the furnace. The essence of garbage fermentation is the process of improving domestic garbage by relying on the life activities of microorganisms. Therefore, the fermentation rate of garbage depends largely on the activity of microorganisms. Studies have shown that when the temperature of the garbage dump is 30-65°C, the mesophilic and high-temperature bacteria are active, and the fermentation process is faster. If the ambient temperature is low, the temperature of the garbage dump will also decrease, and the ferme...

AI Technical Summary

Problems solved by technology

But in winter, especially in northern my country, the temperature of the garbage entering the site is very low, and the garbage is frozen or even entrained with ice and snow, which is extremely unfavorable to the fermentation process, and the calorific value of the garbage decreases under the same fermentation time

Usually, in this case, the fermentation time of garbage can only be extended, but the fermentation time is limited by the storage of the garbage pit, and finally it can only be put into the combustion system to burn low calorific value garbage, which greatly increases the operating cost and is not conducive to the control of secondary waste during the incineration process. Formation of oxins and other pollutants

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