JP2003075090A - Equipment for non-contact gas-heating by steam - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide gas-heating equipment, in which generation of Karman vortex is prevented, a lead pipe is shortened, the number of pieces of heating pipes and welding parts are reduced, and the number of man-hours and materials are saved. SOLUTION: A main steam-supply pipe 11 is placed on either side of the front end and the rear end in the longitudinal direction of a casing 14, and a main steam-discharge pipe 17 is placed in the end of the other end. A lead pipe 13 and a discharge-side lead pipe 15 are branched respectively along the front end and the rear end of the casing 14. A heating pipe 18 is provided between the branched lead pipes 13 and 15. The heating pipe 18 is provided, as required, slantingly downward from the supply side to the discharge side.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-contact gas heating apparatus using steam. [0002] A general structure of a "non-contact gas heating device using steam" (hereinafter simply referred to as "gas heating device") is as follows.
As shown in FIG. 3, the main steam supply pipe 31 branches into a lead pipe 33 via a header 32 and extends in the longitudinal direction of the casing 34. A discharge side lead pipe 35 extending in the longitudinal direction of the casing 34 is a discharge header. From 36, the heat is sequentially collected into a main steam discharge pipe 37, and a number of heating pipes 38 are provided between the lead pipe 33 and the discharge side lead pipe 35 so as to communicate with each other. [0003] As can be seen from FIG. 3, the conventional gas heating device 30 is provided with a lead pipe 33 and a discharge-side lead pipe 35 in the longitudinal direction of a casing 34, and the longitudinal direction of the casing 34. Since a number of heating tubes 38 are connected so as to be orthogonal to the gas G to be heated flowing through the tube, Karman vortices which cause tube vibrations are generated, so that it is necessary to take measures against vibrations of the heating tubes, It became extremely large and required necessary materials, which hindered cost reduction. In view of the above problems, the present invention eliminates the occurrence of Karman vortices without reducing the heating effect of gas,
It is an object of the present invention to provide a gas heating device that shortens a lead pipe, greatly reduces the number of heating tubes, reduces welding spots, reduces man-hours and materials, and enables cost reduction. In order to solve the above-mentioned problems, the present invention arranges a main steam supply pipe at one of a front end and a rear end in a longitudinal direction of a casing, and a main steam discharge pipe at the other. Then, a lead pipe is branched from the main steam supply pipe and the main steam discharge pipe via a header along the front end face and the rear end face of the casing, and a heating pipe is provided between the branched lead pipes. If necessary, the heating tube is inclined downward from the supply side to the discharge side. According to the present invention, the heating pipe is arranged in the longitudinal direction of the casing, thereby eliminating the Karman vortex and shortening the lead pipe. The number of welding points is greatly reduced, which saves man-hours and materials. Next, an embodiment of the present invention will be described with reference to FIG. A main steam supply pipe 11 is connected to a header 12 provided at one end of the casing 14, and a lead pipe 13 branches off from the header 12 along an end of the casing 14. At the other end of the casing 14, there is provided a discharge header 16 connected to a main steam discharge pipe 17, from which a discharge lead pipe 15 branches off. A large number of heating tubes 18 are provided in communication with the lead pipe 13, and are supported by heating tube support fittings H at several intermediate positions. The gas to be heated is supplied from a downstream side to an upstream side of the heating pipe by means not shown, and is heated to a predetermined temperature while passing through the casing. In the present invention, since the heating tube is long, it is expected that the heating tube expands by sending steam. Therefore, it is necessary to make the relationship between the casing and the lead pipe slippery. Next, the present invention will be described with reference to FIG. 2 and FIG. In the conventional gas heating device of FIG.
Lead pipe 3 extending upward in the longitudinal direction of casing 34
2 and a large number of heating pipes 38 are welded between the discharge-side lead pipe 35 fixed to the lower side, and a long lead pipe is required. According to the description, the lead pipe 13 is attached to one end of the casing 14.
Is provided, and the discharge side lead pipe 15 is provided at the other end, and the heating pipe 18 is provided therebetween. Therefore, the number of pipes and the number of welding points are greatly reduced. As described above, according to the present invention, the arrangement of the heating pipe in the longitudinal direction of the casing eliminates the occurrence of Karman vortices and eliminates the need for measures to prevent vibration of the heating pipe. The length of the side lead pipe can be shortened, the number of welding points between the lead pipe and the heating pipe can be reduced significantly, and the man-hour and materials can be saved.

BRIEF DESCRIPTION OF THE DRAWINGS [FIG. 1] (a) plan view, (b) front view, (c) side view of the device according to the present invention [FIG. 2] configuration diagram of the device [FIG. Structure of the apparatus [Description of symbols] 10, 30 Gas heating device 11, 31 Main steam supply pipe 12, 32 Header 13, 33 Lead pipe 14, 34 Casing 15, 35 Discharge side lead pipe 16, 36 Discharge side header 17, 37 Main steam discharge pipe 18, 38 Heating pipe H Heating pipe support fitting M Pressure gauge

Claims (1)

Claims: 1. A main steam supply pipe is disposed at one of a front end and a rear end in a longitudinal direction of a casing, and a main steam discharge pipe is disposed at the other, and the main steam supply pipe and the main steam discharge are provided. A non-contact gas heating device using steam in which a lead pipe is branched along a front end face and a rear end face of a casing from a pipe via a header, and a heating pipe is provided between the branched lead pipes.