JPS6256302A - Reactor for decomposing methanol - Google Patents

Abstract

PURPOSE:To pack a catalyst uniformly and to improve the heat transmission by providing a straight fin on the outer peripheral wall of the heating tube of the titled reactor for decomposing or reforming methanol in the axial direction. CONSTITUTION:In the reactor for decomposing or reforming methanol, a straight fin 15 is provided on the outer peripheral wall of a heating tube 10 in the axial direction. By providing the straight fin 15 on the heating tube 10, some sections can be formed in the catalyst bed 9. Consequently, the catalyst can be uniformly packed and the heat transmission is improved. Accordingly, the apparatus can be made compact and the cost can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a reactor for decomposing or reforming methanol.

[Conventional technology]

The most important point in a methanol decomposition reactor in which a catalyst is packed on the outside of a heating tube is to form a uniform flow of methanol vapor within the catalyst layer. Conventionally, the inside of the reaction tube was filled with a catalyst, and the methanol vapor flowed through the reaction tube, but there is no such structure in which the outside of the tube is filled with a catalyst like this one.

[Problem that the invention seeks to solve]

When filling the outside of the heating tube with a catalyst, if the catalyst is not filled uniformly, methanol vapor will flow unevenly and the desired performance will not be achieved.

Furthermore, unless heat exchange is uniformly performed from the heating tube to the catalyst, the two reactors will not exhibit the desired performance.

It is an object of the present invention to provide a methanol decomposition reactor having a structure that has a good heat transfer effect as a heating tube and can be uniformly filled with a catalyst.

[Means for solving problems]

A methanol decomposition reactor for decomposing or reforming methanol, in which straight fins are provided in the axial direction on the outer peripheral wall of a heating tube.

First, in order for methanol vapor to flow uniformly within the catalyst, it is necessary to provide a section within the catalyst layer that allows the catalyst to be uniformly filled to some extent. on the other hand.

To increase the heat exchange from the heating tube to the catalyst.

It is necessary to increase the contact area between the catalyst and the heating tube. Therefore, it is 17 that satisfies both.

By attaching straight fins in the axial direction of the heating tube, a certain degree of division is created within the catalyst layer.

This allows uniform loading of the catalyst.

[Effect]

Heating tube (stop and attach tofin) - (〆C'
.

The catalyst is uniformly filled with the catalyst, improving heat transfer characteristics, which leads to smaller equipment and lower costs.

〔Example〕

Examples of embodiments of the present invention are shown in FIGS.
The figure shows, as an example, a vertical decomposition reactor. In FIG. 1, methanol vapor is introduced into the reactor body 1 from a methanol vapor inlet nozzle 4.

Then 2 perforated plate8. It passes through the entire wire mesh 7 and flows to the catalyst layer 9.
During this time, the methanol vapor is heated by the heating pipe 10, so that it is decomposed or reformed and is discharged from the gas outlet nozzle 5. FIG. 2 shows a longitudinal sectional view of the packed portion of the catalyst bed. FIG. 3 is a cross-sectional view of the packed portion of the catalyst bed. As is clear from Fig. 3, Fig. 3 (a) shows the case of staggered arrangement and Fig. 3 (b) shows the case of square arrangement, so that small sections can be constructed.
Uniform packing of catalyst becomes possible.

〔Effect of the invention〕

The ability to uniformly charge the catalyst and the heating tube with straight fins provides good heat transfer characteristics, leading to a more compact and cost-effective device as a whole.

Note that the same effect can be obtained even if the two reactors are placed horizontally.

[Brief explanation of drawings]

FIG. 1 is an illustrative view of a first embodiment B of the methanol decomposition reactor of the present invention, FIG. 2 is a longitudinal sectional view of the packed part of the catalyst bed, and FIG.
The figure is a cross-sectional view of the packed portion of the catalyst layer.

Claims (1)

[Claims] A methanol decomposition reactor for decomposing or reforming methanol, characterized in that a straight fin is provided in the axial direction on the outer peripheral wall of a heating tube.