Efficient casing pipe type air heater device

Abstract

The invention relates to an efficient casing pipe type air heater device. The device is provided with a steam header (7) on the upper portion of one end in an outer frame (9); one end of the steam header (7) is connected with a steam inflow pipe (5); the other end of the steam header (7) is connected with an inner pipe (1); the exterior of the inner pipe (1) is sleeved with an outer pipe (2); oneend of the outer pipe (2) is closed by an outer pipe plug (3); fins (4) are wound on the outer wall of the outer pipe (2) to form a fin pipe: the lower portion of one end in the outer frame (9) is provided with a hydrophobic header (8); one end of the hydrophobic header (8) is connected with a hydrophobic pipe (6); and the other end of the hydrophobic header (8) is connected with an outer pipe (2). A coaxial type structure is adopted for the device, and fluid enters from the inner pope, returns through a folding back chamber, and returns through a sandwich layer channel between the outer pipeand the inner pipe. The temperature distribution of the outer wall of a whole casing pipe tends to be uniform in the pipe length direction, and the phenomena of hot expanding leakage, bend brushing leakage and outlet hydrophobic icing and the like can be well avoided. The efficient casing pipe type air heater device has the beneficial effects of being compact in structure, easy to machine, low incost, long in service life and the like.

Description

Technical field [0001] The invention relates to a boiler auxiliary equipment of a thermal power plant, in particular to a high-efficiency casing heater device for controlling low-temperature corrosion of the boiler, saving energy and reducing consumption. Background technique [0002] Boiler heaters are auxiliary equipment to control low-temperature corrosion of boilers. In the 1970s, the low-temperature corrosion of boilers in my country's power plants was quite serious. At that time, the two electromechanical departments set up research questions, and one of the results was the use of heater equipment. When the temperature is low in winter, during boiler startup and low-load operation, and when the boiler exhaust gas temperature is low, a steam heater is used to raise the outside air temperature to a certain extent before sending it to the boiler air preheater. After the air heater is used at the inlet of the air preheater of the power station boiler, it can avoid the oxygen c...

AI Technical Summary

Problems solved by technology

[0004] Technical problem: The problem to be solved by the present invention is to propose a high-efficiency sleeve-type air heater with simple manufacturing process, low cost, convenient installation and use, and long-term safe and stable operation for the problems of blockage and leakage of traditional power plant boiler heaters. device

Images