A circulating bed heat-conducting oil boiler with an anti-wear structure in the tail shaft

Abstract

The invention relates to a tail shaft circulating fluidized bed heat conducting oil boiler with an abrasion resistant structure. The tail shaft circulating fluidized bed heat conducting oil boiler with the abrasion resistance structure comprises a gas flue. The gas flue is provided with a gas flue back wall, a gas flue front wall and gas flue walls at two sides. An abrasion resistant and fire proof device is arranged on the inner wall of the middle of the gas flue back wall; a plurality of horizontal coil pipes are arranged on the inner wall in the middle of the gas flue; a plurality of convection tubes are arranged at the lower portion inside the gas flue; the abrasion resistant and fire proof device is in a triangular shape; the height of the abrasion resistant and fire proof device is h, and the width of the abrasion resistant and fire proof device is delta; the diameter of each horizontal coil pipe is d; h equals (3-10)d, and delta 1 equals (0.5-2)d; the distance between the horizontal coil pipes and the inner side of the upper portion of the gas flue front wall is delta 2; delta 2 is larger than or equal to 0.5d; the distance between the horizontal coil pipes and the corresponding inner walls of the gas flue walls at two sides is delta 3; and delta 3 equals (0.5-2)d. The beneficial result of the tail shaft circulating fluidized bed heat conducting oil boiler is that the abrasion of the horizontal coil pipes is avoided by means of arranging the abrasion resistant and fire proof device on the inner wall of the middle portion of the gas flue back wall. The tail shaft circulating fluidized bed heat conducting oil boiler has the advantages of being simple in structure, being convenient and fast to process and the like.

Description

technical field [0001] The invention relates to the technical field of heat conduction devices, in particular to a circulating bed heat conduction oil boiler with an anti-wear structure at the tail shaft. Background technique [0002] The boiler adopts a single drum and natural circulation mode, which is generally divided into two shafts at the front and the rear. The front shaft is a general suspension structure, surrounded by membrane water walls. From bottom to top, it is the primary air chamber, dense phase area, and dilute phase area, and the tail flue is from top to bottom: high temperature superheater, low temperature superheater, economizer, and air preheater. The tail shaft adopts a supporting structure, and the two shafts are connected by a vertical cyclone separator, and the lower part of the separator is connected with a return device and an ash cooler. The dust-laden flue gas coming out of the separator enters the heating surface of the coil and the convection...

AI Technical Summary

Problems solved by technology

The dust-laden flue gas coming out of the separator enters the heating surface of the coil and the convection heating surface, which may easily cause wear and tear of the heating pipe in this part, requiring shutdown for maintenance, consuming a lot of manpower and material resources, affecting work efficiency and many other disadvantages

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