In order to increase the roof temperature by 50,100, a hot blast stove burning blast furnace gas needs a major renovation, and requires a large investment and a long construction period.
For example, from strengthening the heat insulation of the hot-air pipe and reducing the heat loss of the hot-air pipe system, the effect of increasing the wind temperature by several tens degrees can also be obtained. The hot air furnace top temperature is 1300, the supply air temperature is 1050, and the heat loss is as high as 250.
In order to reduce the heat loss of the hot air duct system, the asbestos board in the upper half of the original hot air duct can be replaced with a ceramic fiber blanket without changing the size of the original hot air duct shell, and another layer of 10 mm thick ceramic Fiber blanket, so that only reducing the inner diameter of the brick lining 20mm, you can receive the effect of reducing heat loss.
During the construction of the pipeline, two layers of 10mm thick ceramic fiber blanket thermal insulation layer are laid on the inner wall of the shell, and then the inner ring brick lining is laid.
The contact surface between the brick lining and the ceramic fiber blanket is easy to scratch the ceramic fiber blanket insulation layer during the construction process, so the ceramic fiber blanket must be selected, so that the problem of the ceramic fiber blanket insulation layer being damaged during construction can be solved.
In addition, due to the elasticity and compressibility of the ceramic fiber blanket, the brickwork above the ceramic fiber blanket’s thermal insulation layer will loosen under pressure, so the lower semicircle of the pipeline can only use asbestos board insulation.