Air preheating device utilizing boiler flue gas for heat exchanging

Abstract

An air preheating device utilizing boiler flue gas for heat exchanging comprises a filtering heat exchanging barrel, a flue gas inflow pipe, a flue gas exhausting pipe, an air inflow pipe and an air exhausting pipe; the flue gas inflow pipe is arranged on the middle of the bottom end of the filtering heat exchanging barrel; the flue gas exhausting pipe is arranged on the middle of the top end of the filtering heat exchanging barrel; the air inflow pipe is arranged at the upper right end of the filtering heat exchanging barrel; the air exhausting pipe is arranged at the lower left end of the filtering heat exchanging barrel; the interior of the filtering heat exchanging barrel is composed of a smoke collecting filtering chamber and a heat exchanging chamber; the smoke collecting filtering chamber is arranged at the lower end in the filtering heat exchanging barrel; the heat exchanging chamber is arranged at the upper end in the filtering heat exchanging barrel; the top end of the smokecollecting filtering chamber is connected with the heat exchanging chamber through a gas conveying pipe; the middle of the bottom end of the smoke collecting filtering chamber is connected with the flue gas inflow pipe; the middle of the top end of the heat exchanging chamber is connected with the flue gas exhausting pipe; the upper right end of the heat exchanging chamber is connected with the air flow pipe; and the lower left end of the heat exchanging chamber is connected with the air exhausting pipe. The air preheating device utilizing the boiler flue gas for heat exchanging can effectively utilize the boiler flue gas to preheat cold air, and it is facilitated that after the air enters a boiler, fuel can be combusted more sufficiently.

Description

Technical field [0001] The invention relates to an air preheating device, in particular to an air preheating device using boiler flue gas to exchange heat. Background technique [0002] In the traditional structure, the combustion-assisting air of various boilers directly absorbs the cold air from the outside, which is not conducive to combustion, and also consumes a certain amount of heat energy. Especially when low-calorific value fuels are used, the furnace temperature cannot meet the requirements for use. To achieve the effect of energy saving, and boiler flue gas generally contains a lot of heat energy, and for this heat energy, if it is not used, it will be a lot of waste, and the heat in the boiler flue gas will also cause thermal pollution to the air. . Summary of the invention [0003] The purpose of the present invention is to provide an air preheating device that uses boiler flue gas to exchange heat, which can effectively use boiler flue gas to preheat and heat cold...

AI Technical Summary

Problems solved by technology

[0002] In the traditional structure, the combustion-supporting air of various boilers directly absorbs the cold wind from the outside, which is not conducive to combustion and consumes a certain amount of heat energy. To achieve the effect of energy saving, and the boiler flue gas generally contains a large amount of heat energy, and for these heat energy, if not utilized, it will be a lot of waste, and the heat in the boiler flue gas will also cause thermal pollution to the air

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