Horizontal shell boiler

Abstract

The invention provides a horizontal shell boiler, belonging to the heating equipment field, and specifically relating to the fuel oil-fuel gas two-return shell hot water or steam boiler. The technical scheme is as follows: the left end of a full waveform boiler furnace is communicated with a burner and the right end thereof and the top of the boiler furnace are of an integrated structure and communicated with a convection bank of a hearth; the convection bank of the hearth is sequentially backwards communicated with a rear smoke box, a convection heating surface, a front smoke box and a smoke outlet; and steel tubes in the convection bank of the hearth are triangularly and equidistantly arranged in parallel, wherein the distance is R plus (18-20)mm (R is diameter); and when the rated thermal power of the boiler is 0.5t-20t and when the diameter of the hearth is 400-1700mm, the diameter of each steel tubes is phi45-phi70mm and the wall thickness of each steel tubes is 3mm-4mm. The horizontal shell boiler has the beneficial effects of reducing steel consumption of equipment, enhancing heating property, preventing irradiation damage of flame to the rear smoke box, improving heat exchange efficiency and obviously prolonging the service life of the rear smoke box.

Description

technical field [0001] The invention belongs to the field of heating equipment, in particular to a two-pass shell-type hot water or steam boiler with fuel oil and gas. Background technique [0002] Boiler is a kind of heating equipment, which uses oil or gas as fuel to produce steam or hot water through combustion to generate heat. The typical furnace types of fuel-gas horizontal boilers in the past are: 1. Horizontal downstream wet-back three-pass shell boilers. 2. Horizontal central backfired shell boiler. 3. Dry-back two-pass shell boilers, etc., have the following characteristics: [0003] 1. Horizontal downstream wet back three-pass shell boiler. The flue gas heat flow process of the boiler is as follows: Furnace gall → back combustion chamber → first convective heating surface → front smoke box → second convective heating surface → rear smoke box → chimney. The disadvantages are that the diameter of the boiler shell is large, the number of smoke pipes is large, the...

AI Technical Summary

Problems solved by technology

Because this kind of boiler has no furnace roof, the rear end of the furnace is the rear smoke box, which is directly radiated by the flame, so the working conditions are harsh, the service life is short, and the maintenance workload is heavy.

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