JPH02252601A - Fossil fuel reforming equipment by utilizing solar heat - Google Patents

Abstract

PURPOSE:To obtain the title reforming equipment capable of reforming a fossil fuel by solar heat and reduced in consumption of fossil fuel accompanying the reforming by arranging a reacting tube constituted so as to pass fossil fuel through the inner catalyst layer in the focus position of a reflecting mirror for collecting solar heat. CONSTITUTION:Light is collected in a reacting tube 3 installed on the front face of a reflecting mirror 2 by the reflecting mirror 2 arranged so as to be able to change the direction by automatic tracking equipment 4 so as to always have optimum inclination to the direction and height of sun in the solar light 1. On the other hand, the reacting tube 3 is installed in the focus part of a reflecting mirror 2 and an inner tube 8 is inserted in the reaction tube so as to be effectively able to utilize solar heat and a catalyst 5 for reforming (or cracking) is packed into a circular part. Then a raw material gas (mixed gas of fossil fuel and steam) 6 for reforming is introduced into a catalyst layer 5 and reformed into a reforming gas 7 consisting of H2 and CO in the inside of the catalyst layer 5. Then the reformed gas 7 is reversed after reaction and passed through the inside of the inner tube 8 installed in the reacting tube 3 and heat is recovered in the catalyst layer part and taken out of the reacting tube 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fossil fuel reforming device in a hydrogen production plant, a thermal power plant, etc.

[Conventional technology]

Conventional fuel reformers generally supply the amount of heat necessary for the reforming reaction using heat obtained by burning fossil fuels.

One aspect of this conventional device will be explained with reference to FIG. A plurality of reaction tubes 3 are installed in a reforming furnace 2 equipped with a plurality of heating burners 4.
is provided, and this reaction tube 3 has a -F section communicating with 2.
It is a heavy pipe, and the annular part is filled with a reforming catalyst 5, and the raw material gas l (for example, natural gas, LPG
, methanol, etc.) passes through the reforming catalyst 5 in the reaction tube 3 from the outside, is heated to cause a reaction, and is reformed into hydrogen, carbon oxide, diacid, oxygen oxide, etc., and becomes a reformed gas 6. It passes through the inner tube part of the reaction tube 3 and is discharged to the outside.

Further, the heating burner 4 burns fossil fuel (eg, oil, coal, etc.).

[Problem to be solved by the invention]

In conventional fuel reformers, the amount of heat required for the reforming reaction is obtained from the combustion heat of fossil fuels, but in actual equipment it is difficult to use all of the heat supplied to the fuel reformer for fuel reforming. is impossible.

For this reason, in actual equipment, it is necessary to use more fuel than the increase in calorific value obtained in the fuel reforming process.
It has been impossible to increase the calorific value of fossil fuels as a whole.

In view of this situation, the present invention aims to reform fossil fuels using solar heat and reduce the associated consumption of fossil fuels.

[Means to solve the problem]

The present invention comprises a reflecting mirror that concentrates solar heat and a reaction tube configured to allow fossil fuel gas to pass through an internal catalyst layer, and the reaction tube is arranged at the focal point of the reflecting mirror. This is a fossil fuel reformer that utilizes solar heat.

It is preferable that an automatic tracking device is attached to the reflecting mirror of the device of the present invention so that the reflecting mirror is always oriented in the correct direction with respect to the direction and altitude of the sun.

Further, it is preferable that the reaction tube is a double tube, the annular portion thereof is filled with a catalyst, and the fossil fuel gas is first reversed through the annular portion and exits from the system through the central tube.

That is, the present invention involves reforming fossil fuels (increasing calorific value and producing useful gas components such as hydrogen and carbon oxide) using solar heat.This reforming of fossil fuels involves reflecting the thermal energy of solar heat. This device collects heat using mirrors and heats the reaction tube to the temperature required for reforming.

[For production]

Temperature required for reforming reaction of solar heat using a reflecting mirror (varies depending on the type of fossil fuel: e.g. natural gas, L, I) G
etc.: 80°0~900°C Methanol: 250~300°C
Degree) Heat is collected and heated using soil.

A reaction tube filled with a reforming catalyst is installed in the heat collecting section, and the raw material fossil fuel and reforming gas are introduced into the reaction tube. The raw material gas undergoes the following reaction due to the collected solar heat, and is reformed into hydrogen, carbon oxide, carbon dioxide, and the like.

The heating star on the right side of solar heat ω~■ corresponds to the solar energy recovery star.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a schematic diagram of the entire structure, and FIG. 2 is a schematic diagram of the reaction tube.

As shown in FIG. 1, sunlight 1 is focused by a reflecting mirror 2 onto a reaction tube 3 installed in front of it. The reflecting mirror 2 can be changed in direction by an automatic tracking device 4 so that it always has the optimum direction with respect to the direction and altitude of the sun.

On the other hand, as shown in FIG. 2, the reaction tube 3 is installed at the focal point of the reflecting mirror 2, an inner tube 8 is inserted so that solar heat can be effectively utilized, and a reforming (or cracking) catalyst 5 is placed in the annular section. Fill it. The raw material gas for reforming 6 (mixed gas of fossil fuel and steam) is introduced into the five layers of the reforming catalyst, and reformed therein into a reformed gas 7 consisting of hydrogen, carbon oxide, and the like. After the reaction path Y, the reformed gas is reversed, passes inside the inner tube 8 installed in the reaction tube 3, and is taken out of the reaction tube 3 after heat is recovered by the catalyst layer.

〔Effect of the invention〕

The present invention makes it possible to cover the amount of heat required for fuel reforming with solar energy, and is expected to reduce fuel costs and suppress carbon dioxide emissions.

In addition, it is possible to prevent the occurrence of hot spots (local overheating) in the reaction tube, which was a problem with conventional fuel reformers, improving reliability and making it possible to use inexpensive materials (SUS materials, etc.) becomes.

Furthermore, since the weight of fireproofing and heat insulating materials, which accounted for most of the heat capacity of conventional devices, can be significantly reduced, the time required for startup can also be shortened.

[Brief explanation of drawings]

FIG. 1 is an overall schematic diagram of an apparatus according to an embodiment of the present invention, FIG. 2 is a schematic diagram of a reaction tube according to an embodiment of the present invention, and FIG. 3 is an embodiment of a conventional fuel reformer. It is a schematic diagram.

Claims (1)

[Claims] It consists of a reflecting mirror that collects solar heat and a reaction tube configured to allow fossil fuel gas to pass through an internal catalyst layer, and the reaction tube is arranged at the focal point of the reflecting mirror. This is a fossil fuel reformer that uses solar heat.