JPS62172186A - Heat exchanger - Google Patents

Abstract

PURPOSE:To obtain a heat exchanger having no errosion, vibration or the like of a spacer by a method wherein a tie-rod is divided into several pieces corresponding to spaces between baffle plates and both ends thereof are provided with screws to constitute the bundle of tubes without employing a spacer. CONSTITUTION:A baffle plate 3 is pinched between tie-rods 13, 14, divided into several pieces and provided with male and female screws at both ends thereof, to assemble them sequentially. The tie-rod section of a final baffle plate is tied wholely by employing a nut 6. Fluid A to be cooled enters into a cylinder 1 through an inlet tube stand 8 of the cylinder, passes the outer surfaces of heat transfer tubes 2 while being guided by the baffle plates 3 and is discharged to the outside of the device from the outlet tube stand 9 of the cylinder. On the other hand, cooling fluid B flows into a water chamber 10 from the inlet tube stand 11 of the water chamber and is distributed into the holes of the heat transfer tubes, which are provided on a tube plate 7, thereafter, returns again into the water chamber 10 through the heat transfer tubes 2 and is discharged out of the water chamber through the outlet tube stand 12 of the water chamber. Spacers, constituting the bundle of tubes, become unnecessary whereby the advancement of corrosion due to the stagnation of sluge in gaps between the spacers and the tie rods as well as the vibration of the spacers due to the flow of fluid at the side of the cylinder may be eliminated.

Description

[Detailed description of the invention] [Field of application of the invention] The present invention relates to a tube bundle structure of a multi-tubular heat exchanger.

It is particularly suitable for handling fluids with a lot of sludge on the barrel side.

[Background of the invention]

Conventionally, the tube bundle structure of a multi-tubular heat exchanger is based on the literature [Chemical Industry Association 1 edition, Process machine rI structure, design series]
As the "heat exchanger" is also introduced, the structure of the tube bundle is heat exchanger tubes, /i? It is made up of plates, baffles, spacers, tie rods, etc.

Here, the spacer is attached to and held by the tie rod in order to maintain the spacing between the baffle plates at a predetermined size.

The detailed installation of the tie rod 4 and spacer 5 is shown in the third figure.
It will look like the figure.

Here, a gap gl is required between the inner diameter φd2 of the spacer 5 and the outer diameter φdl of the tie rod for assembly purposes.
When handling highly corrosive fluids.

If sludge or the like accumulates here, it will not be discharged outside the spacer and will remain in the gap gi. In such a case, corrosion will occur at this location and the corrosion will gradually progress. In addition, a plurality of spacers 5 are installed within the baffle plate interval Q1, and if the spacer dimensions Q1 are uneven, the length will be short.
The spacer is in a floating state, and since the spacer 5 is only resting on the tie rod 4 and is not particularly stopped, it moves under the force of the fluid on the body side, which induces vibrations, causing noise or damage. There are concerns about this.

[Purpose of the invention]

The object of the present invention is to provide a tube bundle structure of a shell-and-tube heat exchanger,
The purpose is to provide a heat exchanger that is free from spacer corrosion, vibration, etc. by eliminating the spacer and having the tie rods also serve as spacers.

[Summary of the invention]

It relates to a spacer in a tube bundle structure built into the body of a shell-and-tube heat exchanger. Corrosion, vibration.

It is an attempt to provide something that is not available.

Conventionally, spacers were used to ensure the spacing between baffle plates, but in this invention, the tie rods are divided according to the baffle plate spacing, and screws are provided at both ends of the divided tie rods, allowing the tie rods to function as spacers. This is intended to provide a multi-tube heat exchanger with a tube bundle without spacers.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

Figure 2 shows the overall configuration of the shell-and-tube heat exchanger. The fluid A to be cooled flows into the body 1 by 1 m from the body inlet pipe stub 8, passes through the outer surface of the heat transfer tube 2 while being guided by the baffle plate 3 (at this time, it is cooled and performs a predetermined heat exchange), and expands. It exits outside the vessel from the outlet nozzle 9. On the other hand, the cooling fluid B is supplied to the ice chamber inlet nozzle 11
The water flows into the ice chamber IO from there, flows into a large number of heat transfer tube holes provided in the tube plate 7, passes through the heat transfer tubes 2, returns to the ice chamber 10, and exits from the ice chamber outlet nozzle holder 12 to the outside of the water chamber. Here, fluid A'/J on the shell side It must be held down to a predetermined dimension Ql (conventionally, a spacer 5 was used as shown in FIG. 3). As shown in Fig. 1, the present invention is a tie rod (
Place the baffle plate 3 between a) 1'3 and the tie rod (b) 14 and assemble them one by one.

In this way, the divided tie rods are assembled one after another, and the tie rod portion of the final baffle plate is tightened as a whole using nuts 6.

According to the present invention, as shown in FIG.
3. By using the tie rod (b) 14, a tube bundle can be constructed without a spacer.

(Effects of the Invention) According to the present invention, the spacer constituting the tube bundle that has been used in the past is no longer necessary, and the corrosion caused by the accumulation of sludge in the gap between the spacer and the tie rod and the corrosion of the spacer due to the flow of fluid on the body side are eliminated. No more vibration problems.

[Brief explanation of drawings]

Fig. 1 is a detailed view of a split tie rod according to an embodiment of the present invention, Fig. 2 is an overall sectional view of a conventional multi-tubular heat exchanger, and Fig. 3 is a tie rod spacer of a conventional multi-tubular heat exchanger. This is a detailed diagram of 6 1...body, 2...heat exchanger tube, 4...tie rod,
5... Spacer, 7... Tube plate, 8... Body inlet nozzle holder, 10... Water chamber, 13... Tie rod (a), 1
4...Tie rod-" / Figure 3

Claims (1)

[Claims] 1. In the tube bundle structure of a shell-and-tube heat exchanger, the tie rod is divided into sections according to the distance between the tie rods, and screws are provided at both ends.
A heat exchanger characterized by constructing a tube bundle without using spacers.