Tilting shell residual heat boiler

Abstract

The invention discloses a tilting shell residual heat boiler comprising an inlet flue, an expansion joint arranged on the inlet flue, a lowering tube, a shell, a boiler barrel, an ascending tube, an outlet flue and a heat exchange smoke tube, wherein, the shell is arranged aslant, and the included angle alpha between the center axis and horizontal direction is 15-85 degrees; the heat exchange smoke tube is arranged in the shell and is arranged parallel to the tilting direction of the shell; the heat exchange smoke tube is provided with a stream guidance clapboard; the lowest point of the shell is provided with a sewage disposal device; a semi-circle clapboard is arranged in the shell and has a distance 1 of (0.8-3) D with the front end of the shell; a fire-proof anti-wear layer is built in the connection point of the inlet flue and a front tube board; the sewage disposal device comprises a sewage disposal tube and a sewage disposal arc-shaped board, and the included angle beta betweenthe tangent of the sewage disposal arc-shaped board and the horizontal direction is 5-60 degrees. More than two heat exchange smoke tubes are provided, the minimum distance L between the heat exchange smoke tube and the upper top of the shell is (1 / 3-1 / 2)R. Two or more shells can be provided to be arranged in parallel. The invention has the advantages of favourable tightness, safe water circulation, reduced soot formation and the like.

Description

technical field [0001] The invention relates to an inclined shell boiler for waste heat utilization, in particular to an inclined shell waste heat boiler suitable for utilization of waste heat from flue gas with high dust content generated by submerged arc furnaces and the like. Background technique [0002] The currently dominant water tube waste heat boilers can be made large enough in terms of evaporation capacity and pressure, but due to the poor sealing of the system and serious air leakage, especially when the dust content of the flue gas is high, it is easy to be heated. The area is ash, and it is not easy to clean up the heated area, which will increase the power consumption of the boiler fan, reduce the output, and even the boiler system cannot operate normally. In addition, the heating surface needs a large number of steel frames to support, so that the total floor area of ​​the boiler and the total steel consumption are relatively large, and the corresponding amo...

AI Technical Summary

Problems solved by technology

[0002]The current dominant water tube waste heat boiler can be made large enough in terms of evaporation and pressure, but due to its poor sealing of the system, serious air leakage , especially when the dust content of the flue gas is high, it is easy to appear ash on the heated area, and it is not easy to clean up the ash on the heated area, which will increase the power consumption of the boiler fan, reduce the output, and even the boiler system cannot operate normally

In addition, the heating surface needs a large number of steel frames to support, so that the total floor area of ​​the boiler and the total steel consumption are relatively large, and the corresponding amount of thermal insulation materials required is also large.

[0003]In conventional shell boilers, the high-temperature flue gas directly scours the outer side of the front tube sheet at the inlet end, while the inner side of the tube sheet is low-temperature saturated water, and the excessive temperature difference on both sides causes The front tube plate cracks under the action of stress; when the high-speed flue gas enters the heat exchange pipe, the dust particles in the flue gas will cause serious wear to the end of the pipe. These are problems that cannot be solved by conventional shell boilers.

Moreover, when the dust content of the flue gas is high, the horizontal shell boiler will have serious dust accumulation, and the boiler system cannot operate normally.

The vertical shell boiler can solve the problem of dust accumulation, but its water circulation is not safe enough, and tube bursts often occur, and the heating tube cannot be made too high, and the evaporation is limited

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