SU892115A1 - Waste heat boiler - Google Patents

Description

(54) BOILER-UTILIZER

The invention relates to heat engineering, in particular to heat extraction installations, and can be used in the boiler room irons. The closest of the known technical solutions to the described is the waste-heat boiler containing outer and Eb morning chunks, forming a central flue duct and an annular channel plugged from the ends and connected with lifting and descending pipes to the separator drum l. A disadvantage of the known waste heat recovery boiler is its low reliability due to poor circulation of water at the end walls of the tank: New | channel. Ueoib invention - increased reliability. This chain is achieved by the fact that a conical insert is installed in the annular channel with the formation of annular openings with the inner and outer tubes, the smaller base of which is located with a gap relative to the annular channel suppressed, and the rich base is tightly fastened to the outer tube and provided with a section of the vent hole the annular opening between the insert and the outer tube is additionally connected to the separator drum-. The drawing shows the waste heat boiler, general view. The inner and outer boiler 1 and 2, which form the central gas sock 3 and annular channel 4, are muffled from the ends by walls 5 and connected by lifting and lowering pipes 6 7 to the separator drum 8. In the bundle 4 there is a conical insert 9 directed to the side with a smaller base walls 5 and fastened with a large base with a pipe 2. The insert 9 forms a jnpoeMiJ with pipes 1 and 2. 10 and 11, respectively, and with wall 5, an eaaorer 12. An annular opening 11 is connected to the separator drum 8 by pipe 13, and the insert 9 in the zone of connection to pipe 2 is provided with an overflow hole 14.

The drum-separator is equipped with a feedwater supply pipe 15.

The boiler works as follows.

Hot gases from the process unit enter the gas duct 3 and transfer part of their heat to the water circulating in the annular channel 4. At the same time, the water partially evaporates and in the form of a steam-water mixture through the lifting pipes 6 enters the separator drum 8, where the steam is separated from the water. The steam enters the turbine or process needs and the water is supplied through the downspout pipes 7 into the annular channel 4.

The drum separator 8, the annular channel 4 and pipes 6 to 7 form a natural circulation loop.

Part of the water through the pipe 13 enters the annular opening 11 and moves along the walls of the conical insert 9 to the gap 12, while intensively cooling the inlet portion of the L-pipe1. Then the water enters the cial 4, where also through the opening 14 the steam conduit formed in the opening 11 is fed to the mixture.

Thus, the presence of a conical insert 9, which forms annular openings 10 and 11, makes it possible to eliminate stagnant

zone at the end wall of the annular channel 4, which increases the reliability of the boiler.

Claims (1)

Invention Formula A heat recovery boiler containing outer and inner pipes forming the central gas duct and the annular channel plugged from the ends and connected to the lifting and lowering pipes and to the separator drum, characterized in that with a chain of increasing reliability by improving circulation in the annular channel the formation of annular openings with the inner and outer tubes has a conical insert, the smaller base of which is located with a gap relative to the closed end of the annular channel, and the larger base is tightly fastened to the outer a pipe and an overflow hole in the upper portion, the annular opening between the insert and the outer tube being additionally connected to the separator y. Sources of information taken into account in the examination 1, USSR Copyright Certificate No. 2766039, cl. F 22 V 1/18 05.16.79.