SU6105A1 - Device for preventing harmful stresses in the material at the points of connection of the heating pipes to the steam collector of boilers - Google Patents

Description

With water tube boilers, it is highly desirable and advantageous to protect the places of tube expansion from direct influence of fiery gases.

In the absence of such protection in these places, in the material of the walls, additional stresses may arise under the action of high temperature, which, especially at high vapor pressures, can cause damage to the boilers. Harmful and dangerous additional voltages are especially caused by unilateral heating. The present invention is intended to eliminate the direct effect of fiery gases on the walls of the boilers. To achieve this goal, near the places of expansion of the heating pipes, an air space is provided, which should serve as insulation from fiery gases and allow outside inspection of the places of expansion of the pipes. The air space can be formed, for example, by means of partitions located between the boiling tubes, at some distance from the reservoir walls. Such a partition prevents the fiery gases from entering the air space between it and the reservoir wall and at the same time allows expansion of the heating pipes under the influence of the temperature difference. For this purpose, a bulkhead is sometimes constructed consisting of bricks that perform the gaps between the tubes. But in

In this case, only protection of the boiler wall between the boiling tubes from the precipitation of ash and small pieces of coal is achieved, as well as the possibility of convenient removal of the deposits that are obtained on its surface. In view of this, partitions were constructed only for the lower elements of water tube boilers and were placed above them.

The accompanying drawing shows the embodiment of the proposed device, with FIG. Figure 1 shows a cross section of a boiler plant with one upper boiler Lys, two lower boilers B, connected together with heating pipes C. Partitions e are placed at some distance from the tanks of the boiler plant, and with the help of them they form one air space at each tank. The partitions can consist of any refractory material and can have any shape. They can be made in the form of movable guide elements, which allow expansion of tubes under the influence of heat, or in the form of tiles, pads, etc. Partitions are fixed on supports, which, in turn, are fixed in the walls of the boiler lining and can be used only with some tanks of the boiler plant, for example, only with the upper ones.

FIG. Figure 2 shows an external top view of such a safety partition: on the supports g supported on the walls of the brickwork of the boiler, the supporting organs h are located on which the pads i are placed. These pads i are provided with notches that wrap around the tubes C.

It is also possible to use tiles that are directly supported on the walls of the brickwork of the boiler, passing between adjacent rows of heating tubes and provided with cutouts for the passage of heating tubes.

The formation of the air space in front of the steam and water tanks of the boiler plant results in a significant reduction in heat transfer, both transmitted through heat conduction and radiant heat. In practice, it turned out that the temperature in the insulating air space between the safety partition and the tank wall is very slightly higher than the temperature of the tank wall itself. A further significant benefit to the formation of airspace is that the tube expansion points and the outside are accessible for inspection.

The subject of the patent.

A device to prevent harmful stresses in the material at the points of connection of the heating pipes to the steam boilers of boilers, characterized by using a partition e (Fig. 1) so set up that an air heat insulating chamber / is formed between it and the flare points flaring outside the boiler. to the patent of the inn of the company “Society of superheated steam Schmidt with ogre. rep. No. 6105

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