Technology for preheating garbage storage by using boiler air supply

Abstract

The invention discloses a technology for preheating a garbage storage by using boiler air supply. The technology specifically comprises the following steps of: step 1, sucking and feeding air into a primary preevaporator for heating by a primary air fan; step 2, laying an air passage on an air passage behind the primary preevaporator, and then feeding hot air into the garbage storage by a plurality of small air passages; step 3, before entering the garbage storage, making a pipeline into a Farrar nozzle type, and sucking surrounding cold air and fully mixing; and step 4, making an outlet of anair pipe stretch into the garbage storage, and feeding air by causing the air opening to be downward. The technology can increase the temperature of the garbage storage, greatly improves the efficiency of garbage fermentation when the environment temperature is relatively low, shortens the time of garbage fermentation, and increases the calorific value. The system is relatively simple and has a low failure rate. The heat transfer efficiency of the system is very high. The air in the garbage storage is sucked by the primary air fan for supplementing burning, which is equivalent to increasing the suction air temperature of the primary air, and the suction air is recycled.

Description

technical field [0001] The invention relates to the technical field of garbage incineration, in particular to a process for preheating a garbage storage by using boiler air supply. Background technique [0002] Existing waste-to-energy systems generally use grate furnaces to incinerate waste. According to the current characteristics of my country's current waste with complex components and high moisture content. Before the garbage is put into the furnace, it needs to go through a period of dehydration and fermentation process. According to the research on the fermentation mechanism and application process of garbage piles, it is found that the fermentation of garbage requires proper temperature and time in the garbage storage. For most of the waste-to-energy plants in China, the ambient temperature of the waste storage is generally low in winter, resulting in low fermentation efficiency and even freezing of waste, resulting in a decrease in the calorific value of waste, inc...

AI Technical Summary

Problems solved by technology

For most of the waste-to-energy plants in China, the ambient temperature of the waste storage is generally low in winter, resulting in low fermentation efficiency and even freezing of waste, resulting in a decrease in the calorific value of waste, increased incineration and raw materials, and low furnace temperature. It is uneconomical and has no environmental risk at 850°C

[0003] Existing radiator heating method, but it needs to re-set the heat source and power system separately, which consumes a lot of energy, the project is complicated, and the economy is poor

Set the radiator to exchange heat with multiple media, the heat exchange efficiency is low, the system is complex and there is no convection with the cold air in the garbage storage, the heat exchange effect is average

And the radiator has the risk of corrosion and leakage of steam or water into the storage

[0004] At present, most of the grate furnaces used in domestic waste incineration are equipped with secondary air, which is mainly used to reduce the furnace temperature when the calorific value of waste is high and the load is high, while the secondary air preheater is basically not used. place, long-term storage may easily lead to equipment waste

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