SU262851A1 - Apparatus for converting hydrocarbons under pressure - Google Patents

Description

This invention relates to the field of chemical engineering.

Apparatus for the conversion of hydrocarbons are known, including a heating chamber in which vertical pipes with a catalyst are installed, and a shaft chamber located beneath it, filled with a catalyst. In such devices, process nitrogen is metered into the converted gas by flue gases, which worsens the condition of the process.

To increase the efficiency of the proposed apparatus, the heating chamber is separated from the shaft chamber with a double bottom, with perforated sleeves, into which the ends of the tubes of the heating chamber are inserted. This allows the process air to be introduced into the shaft chamber, evenly distributed over the entire cross section of the apparatus, which increases its efficiency.

FIG. 1 shows the proposed apparatus, obsh, i view; in fig. 2 - double bottom knot.

The metal lined body 1 of an apparatus for converting hydrocarbons under pressure includes a heating chamber with vertical pipes 2 filled with steam reforming catalyst, held together by a spherical tube 3, a distribution chamber located above pipes 2 equipped with a fitting 4 for introducing the reaction gas mixture and leveling grid 5 with uneven perforation, and the mine re-conversion chamber, located under the pipes 2, filled with a vapor-air catalyst, located on eshetke 6, and provided with a fitting 7 for outputting the converted gas from the apparatus. The fittings 8 and 9 are welded into the housing 1 for the supply and removal of flue gases into the heating chamber.

The heating chamber is separated from the mine chamber by a double bottom 10 with perforated sleeves 11 (see Fig. 2) into which the ends of the pipes 2 are inserted. The bottom 10 is protected from thermal overheating by the steam jacket 12 and connected to the KOpajf-coM 1 compensator for thermal expansions 13. Sleeves 11 are packed in the upper part with stuffing box 14 of high-refractory material. The perforations of the sleeves are made below the gland packing, and the total area of the perforations is the same for all the sleeves. In order to supply air into the cavity formed by the double bottom, the nozzle 15 is welded to the housing 1.

500 ° C through fitting 4 is introduced into the distribution chamber, where, due to the uneven perforation of the grate 5, the mixture flow is equalized over the cross section of the apparatus. The distributed mixture enters the vertical pipes 2, where catalytic steam reforming of natural gas to a residual methane content in the converted gas of 8-10% takes place on the catalyst for steam reforming of hydrocarbons due to heat transferred from flue gases.

Flue gases under a pressure of 30 atm and at 1600–1550 ° C over nipple 8 are introduced into the annular space of vertical pipes 2. After cooling the flue gases to 950-1100 ° C, due to the heat transfer of the reaction mixture, flue gases are removed from the apparatus through nipple 9.

Formed in the pipes 2 converted gas enters the shaft chamber of the pre-conversion. This also serves air through the annular gaps between the sleeves 11 and pipes 2. In a mixture of converted gas

partial combustion of hydrogen and methane from the converted gas at 1200–1300 ° C occurs with air. Next, the reaction mixture at 1200-1300 ° C comes

on the catalyst air-vapor conversion, placed on the lattice 6, and the resulting converted gas with a methane content below 0.3 about. % at a temperature of 950-1000 ° C comes out of the apparatus by fitting 7.

Claims (1)

Invention Formula An apparatus for converting hydrocarbons under pressure, including a heating chamber in which vertical pipes with a catalyst are installed, and a shaft chamber located under it, filled with a catalyst, characterized in that, in order to increase the efficiency of the apparatus, the heating chamber is separated from the shaft chamber with a double bottom perforated sleeves into which the ends of the tubes of the heating chamber are inserted.