Mixed composite phase change heat exchanger

Abstract

The present invention relates to a mixed composite phase change heat exchanger for boiler, industrial kiln and furnace and chemical thermal equipment, specially it relates to an improvement on air preheater and coal-saving device structure. It has a high-temp. water-heating device, the high-temp. water-heating device is formed from upper header, lower header and fin tube. The high-temp. water-heating device is positioned at one side of flue gas inlet of phase change heat exchanger, the upper header can be divided into two portions of water inlet and water outlet by means of internal partitionboard, the water outlet is communicated with hot-water output tube, and its water inlet is communicated with coiled tube.

Description

technical field [0001] The invention is a hybrid composite phase-change heat exchanger applied to boilers, industrial kilns and chemical heat equipment, and particularly relates to the improvement of the structures of air preheaters and economizers. Background technique [0002] Patent No. ZL 992263808 discloses an integral heat pipe type composite phase-change heat exchanger. Its structure is to form a phase-change heat exchanger with an inner cavity connected by upper and lower headers, finned tubes, connecting pipes and steam drums; The cavity is filled with an appropriate amount of phase change medium; the partition in the middle of the finned tube divides the upper and lower parts into two parts, the air channel and the flue gas channel, forming the low temperature section of the air preheater; the steam drum is equipped with a coil, and there is cold water in the coil Flow through to form a water heater. A surface thermometer is installed on the last row of finned tub...

AI Technical Summary

Problems solved by technology

When the regulated water flow provided is limited and a higher temperature of hot water needs to be obtained, this kind of equipment is powerless, showing obvious deficiencies, and it is very difficult to increase the temperature;

It is worth pointing out that the current technical problem is that it is difficult to raise the water temperature to more than 70°C. If the temperature of hot water can be raised to about 100°C, it will take another step in the technical direction of low-temperature heat energy utilization.

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