A horizontal enamel tube air preheater

Abstract

The invention discloses a horizontal-type enamel pipe air pre-heater. According to the horizontal-type enamel pipe air pre-heater, the problems that in the prior art, the air pre-heater is low in heat exchanging efficiency and large in size, and a pipe can be frequently replaced caused by the fact that the heat exchanging pipe is prone to being damaged are solved. The air pre-heater has the effects that heat exchanging efficiency is high, the size is reduced, and the phenomenon that the pipe is frequently replaced because of corrosion and damage is avoided. According to the technical scheme, the horizontal-type enamel pipe air pre-heater comprises a pre-heater shell and a storehouse pump; the pre-heater shell is of a horizontal-type structure, a smoke inlet is formed in one side of the pre-heater shell, and a smoke outlet is formed in the other side of the pre-heater shell; an enamel pipe heat exchanging pipe is arranged in the pre-heater shell and adopts a TEPEE pipe discharging mode and is internally provided with a spiral twisted stripe driven through the air flow rate; and the storehouse pump is arranged on the side of the smoke outlet of the pre-heater shell, and therefore accumulated dust on the enamel pipe heat exchanging pipe can be output in time.

Description

technical field [0001] The invention relates to the field of air preheaters, in particular to a horizontal enamel tube air preheater. Background technique [0002] The air preheater is a heat exchange device that uses the heat of the flue gas at the tail of the boiler to heat the air required for fuel combustion to improve the efficiency of the boiler. It is an indispensable equipment for modern large and medium-sized boilers. The air preheater is installed at the rear of the boiler, and the temperature of the heated air (hot air or hot air) reaches 200-400°C, which is very beneficial to improve fuel ignition and complete fuel combustion; the boiler pulverized coal preparation system also needs to supply hot air for drying agent and for conveying powder. After the flue gas flows through the air preheater, the temperature drops to 100-200°C, and then it is discharged from the boiler body. [0003] Air preheaters can be divided into heat transfer type and heat storage type ...

AI Technical Summary

Problems solved by technology

The horizontal air preheater has a simple structure, is easy to manufacture, has small air leakage, and is convenient for operation and maintenance, but it is bulky and heavy, and it is inconvenient to arrange on large boilers, which limits its application

[0004] At present, large-scale boilers mostly use rotary air preheaters. The disadvantages are large air leakage, high technical requirements, difficult manufacture, sometimes stuck and unable to rotate, and inconvenient maintenance.

[0005] To sum up, in the prior art, there is still no effective solution to the problem of enhancing heat transfer and reducing pipe wall corrosion in the air preheater

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