Heat exchanger structure capable of prolonging service life of calcined coke heat exchanger

Abstract

A heat exchanger structure capable of prolonging the service life of a calcined coke heat exchanger relates to a petroleum-coke pot-type calcining furnace, and is characterized in that an upper flange is composed of a plurality of upper flange plates (7), each upper flange plate (7) is fixedly connected with an annular upper header (8) and two adjacent upper flange plates (7) are connected through a connecting plate (9) at the lower side, a gap is formed between two adjacent upper flange plates (7) and a heatproof material (11) is filled in the gap. The upper flange of the heat exchanger structure capable of prolonging the service life of the calcined coke heat exchanger is composed of a plurality of upper flange plates; and the expansion gap is formed between two adjacent upper flange plates so that deformation due to that the thermal expansion of the upper flange is greater than the thermal expansion of the annular upper header can be effectively compensated and the stress of the welding joint between the upper flange and the annular upper header and that of the circular weld joint of the annular upper header can be reduced; as a result, the working reliability of the calcined coke heat exchanger is improved and the service life of the calcined coke heat exchanger is prolonged.

Description

technical field [0001] A heat exchanger structure for improving the service life of a calcined coke heat exchanger relates to a petroleum coke pot calciner, in particular to a high temperature calcined coke heat exchanger for a pot calciner. Background technique [0002] The calcination temperature of petroleum coke in the pot calciner is about 1300°C. After the calcined petroleum coke is discharged through the bottom plate of the furnace, it must be airtight and cooled to lower the temperature below 250°C to prevent the calcined coke from being exposed to air. Oxidative combustion reactions lead to ablation of part of the calcined coke. At present, water-cooled jackets are generally used to cool the high-temperature calcined coke, and then the coke is discharged through the discharge valve. The water-cooling jacket is generally a double-layer steel plate welded structure, the inner steel plate encloses a channel for high-temperature materials; the closed annular interlayer...

AI Technical Summary

Problems solved by technology

Especially the upper flange of the external heat exchanger not only contacts the high temperature of the material, but also directly contacts the bottom plate of the calciner. The temperature is very high, and the thermal expansion and deformation are large, which is easy to cause the weld between the upper flange and the annular upper header. The butt girth weld of the annular upper header is cracked

Images