SU1037939A1 - Reactor with interior circulation of granulated catalyst - Google Patents

Abstract

THE REACTOR WITH THE INTERNAL CIRCULATION OF THE GRANULATED CATALYST, containing disengaged to the distribution, working and tapering transport part of the housing with a coaxially located in it circulating pipe and separator, which in order to improve the reactor productivity by increasing. its best distribution in volume, it is equipped with a leveling plate placed at the top end of the circulation pipe with a coaxial circulation pipe installed in it The lower end face of the circulating pipe is fixed to the upper end of the circulating pipe, the transport part of the body is made conical, and the separation is (the torus is placed between the working and transport parts.

Description

with

;ABOUT

WITH

The invention relates to the shaping of chemical and petrochemical technogogy, namely, reactors with airway, catalyst catalyst for chemical engineering processes, and is intended for carrying out reaction processes in the presence of a granular catalyst, in particular for synthesizing vinyl from acetylene (or etipen) and Kaj of boanovy acids. A contact apparatus for carrying out heterogeneous cathodic processes in the direct-flow mode, consisting of a housing with a coax-mounted, fixed circulation pipe and nozzles for inlet and outlet of gas i, is known. The disadvantage of such an apparatus is that the otxbeM reaction tube and the gas and dispersed catalyst strand are limited only by the circulation pipe, as a result of which the separation zone must be equipped with a special device for handling catalyst casting. Also known is an apparatus comprising a housing divided into distribution, working and transport zones, and a separator 2. However, this reactor is characterized by an insufficiently uniform distribution of components and poor separation of exhaust gases. The closest to the proposed technical essence and the achieved result is an apparatus for exothermic heterogeneous oxidation of hydrocarbons over a granular catalyst, consisting of a vertical elongated body, inside of which is placed a reaction circulation pipe with open ends and a separation chamber with an end wall above the end - reaction end. Noah pipe The disadvantage of this apparatus (reactor) is the limited reaction, formed by the reaction tube, in which the catalyst is in the mode of pneumatic transport and space, squa. which the reflected catalyst is poured into a dense set, as a result of which the reaction occurs by the presence of only a small amount of the catalyst contained in the apparatus. The reactor due to these reasons is inefficient ;, which does not correspond to the volume of the apparatus, and the amount of catalyst in the apparatus. The purpose of the invention is to increase the pro-; efficiency of the reactor by increasing the catalyst working volume due to its better distribution in the volume. me The goal is achieved by the fact that the reactor with internal circulation of a granular catalyst containing a vessel divided into distribution, working and tapering downward part of the vessel with a circulation tube coaxially located in it and provided with a separator is provided with an alignment plate placed above the upper end of the circulation pipe it is coaxially with the circulating tube by the receiving branch pipe and downpipes, the lower ends of which are located below the upper end of the circulating tube, at the same time Sports on the body portion is formed konicheokoy, and a separator disposed mezhlu working and transport portions. The drawing shows the scheme npetjapaemogo reactor. The reactor consists of a housing 1, which narrows downward, a circulation pipe 2 located coaxially inside the housing ° 1, a leveling plate 3 on which the receiving branch pipe 4 and the drain pipes 5, the coil heat exchanger 6-8, the gas separators 9 from the granulated catalyst medium are fixed, a nozzle 10 for introducing a gas-vapor mixture intended for reaction in the reactor; a collecting manifold 11 with nozzles for dp of withdrawing gases from the reactor; a manhole 12 for filling the reactor with a catalyst and for repair purposes. The reactor operates as follows. The internal volume of the housing through the hatch 12, with the inclusion of the circulation pipe, is filled with a catalyst until an amount of catalyst equal in volume to the circulation pipe is accumulated on the leveling plate. After the hatch 12 of the steam and gas mixture is closed, the reaction is carried out through the pipe 10 of the narrowed section, the building, picks up the granulated catalizer and through the circulation pipe 2 of the pneumatic transport mode, throws it through the receiving pipe 4 onto the extraction plate 3.

the mixture, detached from the LPG catalyst, enters. The volume of the case, free from the catapatiator, formed by the descent of pipes 5, and the vortex through the catalyst junction in the annular volume of the casing of the separators 9, the hercuts are separated from the ef fi cation, and through the ampoules all the separators are assembled by the fittings vyvotsits from the reactor as the reaction gases. Expanding & nivayusha tarapka using drain pipes provides the same level of catalyst throughout its free surface in the working volume of the body, which is a prerequisite

equal resistance to gas entrainment. At steady state, the catalyst circulates according to the following scheme: upwards through the circulation pipe to the leveled plate, drainage through the discharge pipes to the working volume of the body, equal measured downward movement to the lower end of the circulation pipe, heat exchanging coils 6-8 built into the volumes assigned to the catalyst, provide the appropriate temperature regime of the reaction process. Directional movement of the catalyst and the vapor-gas mixture in a steady state mode & The choice of such diameters and lengths of structural elements, in which: the motivation of the gas-vapor mixture movement with the catalyst carried along the material pipe is less than the conventional resistance to movement of the same amount of gas mixture through the Ring volume of the narrowed section. corps of separators 9 provided.

that the gas velocity in this annular volume would be lower than the soar velocity of the catalyst granules; . The resistance to gas aviation in the working (reaction) zone of the hull should be less than the resistance to such

the same amount of gases in the constricted area at least five times; the highest gas velocity in the separators 9 should be lower than the soar velocity of the catalyst granules.

Thus, the awesome stream

the gas entraining the catalyst along the pipe and the transport (transport) tube then passes through the entire volume of catalyst that filled the working zone of the reactor, which is its largest part by volume.

The use of the proposed reactor in the gsimic and oil refining industry will allow for the integration of processes in the presence of granular catalysis of the reactor by increasing the volume of the catalizer in the apparatus and the volume of the postdate, in a timely manner in the reactor zone.

Compared with well-known granulated reactor. The catalyst prediaghizable reactor provides an increase in productivity at somnovremeg. nom. weight reduction of the apparatus, simplified design and procession as samples & a hectare between two repairs (the amount of catalyst lost in the process is replenished without stopping the apparatus through the nozzle 1O in combination with the vapor-gas mixture) and arggex.

Claims (1)

REACTOR WITH INTERNAL CIRCULATION OF THE GRANULATED CATALYST, containing a housing divided into a distribution, working and tapering downward ⁷ transport part with a circulation pipe and separator coaxially located in it, characterized in that, with a chain for increasing the reactor working capacity due to the better catalyst volume its distribution in volume, it is equipped with a leveling plate placed by the upper end of the circulation pipe with a receiving plate installed in it coaxially with the receiving pipe m spigot and the downcomers, _ the lower ends of which are located below the upper end of the downcomer, wherein the transport part korpu- 'g meat is conical, that serves as a separator between the working and transport parts.