SU1438627A3 - Ceramic flame tube of industrial radiation burner - Google Patents

Abstract

1. An outer radiant heating tube for an industrial burner having a ceramic flame tube (3) consisting at least partially of individual ceramic tube portions (7, 7a) which are interconnected positively at their ends and with which externally disposed rib-like or cam-like spacing members (14, 16) are associated for radial bearing against an outer tube (1) enclosing the flame tube, each of the tube portions being formed at one end as a socket (8) and having at the other end a cylindrical zone (9) fitting into such socket, characterized in that adjoining tube portions (7, 7a) are inserted into one another with clearance at the socket connecting places, and fitted with clearance on to the outside of the flame tube (3) in the zone of each of the socket connecting places is a ceramic covering ring (11) which is positively fixed to the flame tube (3) in the axial direction, extends in the axial direction over a portion of the cylindrical zone (9) of each tube portion (7, 7a) and is at least partially covered by the associated socket (8).

Description

WITH

four;;

00 O) HCHE

cm

outfitted with radial centering ribs 2, resting on shell 3, in which a pipe is enclosed, the output end sections 3 1 are provided with annular ledges 4, and the input end sections have sockets (P) 5 covering partly and with a gap 6 1. In the zone of connection of the end sections, peripheral E 1 with a gap 7, protective ceramic rings 8 are installed, overlapping the ledges 4 and along the

at least partially P 5 neighboring e 1. Rings 8 may have an annular support platform 9 placed between the ends of the ledge 4 and P 5 neighboring e 1. The input E 1 inside P 5 m can be equipped with an auxiliary ring 10 located in the gap in P 5 of this E and having their centering ribs 11 Ribs 2 m. placed on the surface of the protective ceramic rings 8, and E 1 m. Made of pure silicon carbide. 4 hp f-ly, 1 ill.

one

The invention relates to radiation burners and can be used in industrial furnaces.

The aim of the invention is to improve installation and increase reliability by eliminating local overheating.

The drawing shows a heat pipe, a longitudinal section.

The ceramic heat pipe consists of separate thin-walled ceramic tubular elements 1 connected to each other with end sections and provided externally with centering radial ribs 2 supported on the shell 3, in which the heat pipe is enclosed. The outlet end sections of the e: gement 1 pipe are provided with annular ledges 4, and the input end sections have sockets 5, covering partly and with a gap 6 of the mouth of the 4 previous elements 1. In the connection area of the end sections, protective ceramic rings 8, overlapping along the ledges 4 and (at least partially) sockets 5 adjacent elements 1 pipe. The protective ceramic rings 8 have an annular support platform 9 placed between the end surfaces of the ledge 4 and the bell 5 of the adjacent elements 1. The input element 1 The pipes inside the socket 5 are equipped with an auxiliary ring 10 placed in the gap in the socket 5 of this element: and having their centering ribs 11 Centering ribs 2 are placed on the surface of protective ceramic.

rings 8. In addition, the elements 1 tubes are made of pure silicon carbide.

The heat pipe works as follows.

Combustion components enter the inlet element 1 of the pipe and burn in the pipe. Combustion products are discharged through the gap between pipe elements 1 and shell 3.

The design of protective rings and end sections of elements 1 provides a labyrinth design of annular gaps, excluding the radial release of hot combustion products into the annular gap by elements 1 of the pipe and shell 3, and elements 1 of the pipe can be relatively far away when the pipe 1 bends from the other without breaking the tight connection between elements 1.

The implementation of the elements 1 of pure silicon carbide ensures their high resistance.

Claims (5)

1. A ceramic heat pipe of an industrial radiation burner, consisting of individual thin-walled ceramic tubular elements connected to one another with end sections and provided externally with centering fins, supported by a shell, in which the heat pipe is enclosed, characterized by to make it easier 3f4 No installation and increased reliability by eliminating local overheating, the output end sections of the pipe elements are provided with annular ledges, and the input end sections - with sockets, covering partly and with a gap the ledges of the previous elements, and protective ceramic rings overlapping the ledges and at least partially the sockets of the adjacent pipe elements. 2, The pipe according to claim 1, about tl and h and y - y and a so that the protective ceramic rings I1-1e1ot ring supports The site is located between the end surfaces of the step and the socket of the adjacent elements. 3. A pipe according to claims 1 and 2, characterized in that the inlet element of the pipe inside the socket is provided with an auxiliary ring located in the gap and in the socket of this element, and having its own centering ribs. 4. Pipe POP.1, characterized in that the centering ribs are placed on the surface of the protective ceramic rings. 5. Pipe on PP. 1-4, that is, that the pipe elements are made of pure silicon carbide.