SU14551A1 - A device for heating Perkins tubes in baking ovens - Google Patents

Description

The present invention relates to a device for heating percussions tubes that are installed in baking ovens for the purpose of heating them. In this case, each of the Perkins tubes is, in essence, a small high pressure steam boiler - up to about 225 atmospheres. Due to such high pressure, the service life of these tubes, especially those parts of them, which are located within the furnace and are washed by high temperature gases, is significantly reduced. In addition, the fact that the tubes for heating the furnace are heated directly by gases makes it difficult to control the temperature in the baking chambers, so that, despite vigilant observation, the burning of bread along the length of the tube is often noticed. In addition, with this heating of the tubes directly with gases, an arbitrary temperature increase is possible and an increase in pressure in the tubes associated with etrm, resulting in explosions. The proposed invention; is intended to - to eliminate these disadvantages. According to the invention issued under

out, the chambers with the ends of the Perkins pipes are located across them and the steam tubes come in contact with them, in order to directly transfer the steam tubes to the Perkins tubes from the steam tubes.

In the drawing. FIG. 1 shows schematically a cross-section of a device; FIG. 2 is a longitudinal section of it; FIG. 3 - arrangement of the boiler and steam pipes.

To the ends of the Perkins tubes 1 (whatever furnaces they heat, whether they are ovens with ring conveyor hearths or many brown ones with retractable hearths) located outside the baking chamber, pipes 2 are perpendicular to them, which are supported by a sheet 3 connected to the top sheet 4 bolts 5. The space between these sheets and the entire space between tubes 1 and 2 are poured with metal 6 with a large coefficient of thermal conductivity. If steam is passed through pipes 2 or superheated up to 400 °, or saturated 240 ° -250 °, then due to the high thermal conductivity of the metal 6 i and the low thermal conductivity of the insulating layer 7, an intense heat transfer will occur from the steam in the pipes 2, k, LerkHHca tubes 1. Tubes 2 can be located obliquely and then the heated steam in the boiler 8 from its upper part through the pipes 9 is fed to the stoves, and through the pipes 10 otrabodanny, colder / p. enters the lower part of the boiler.

Betrays the patent.

Device for heating Perkins tubes in baking ovens, characterized by the use of located; under the ends of Perkins tubes 1 released from the bakery chamber, across them and in contact with them, steam; tubes 2 for the purpose of immediate re--. giving heat from steam pipes to pipes: Perkins, for what is better for heat giving giving space b between them is flooded with metal with a large heat conductivity coefficient, and outside the pipe - around, i

... l-afig. one

in.