DD246670A3 - REAKTORBEFUELLVORRICHTUNG - Google Patents

Abstract

The invention relates to a device with which it is possible to fill reactors in Mehrbettausfuehrung through a manhole in the upper part with both inert material large particle size, as it is used for professional foundation of catalyst beds, as well as with catalysts in a wide range of grain sizes. The aim and the object of the invention is to introduce catalyst bodies of the most varied forms and inert material, also of large particle size, by means of this suitable device in good quality with little effort. According to the invention, this device, which can be mounted in the reactor, takes the form of a specially prepared tube whose internal free cross sections are designed at certain intervals so that on one hand catalyst corers are exposed to only minimal mechanical stresses during continuous flow and, on the other hand, bridge formations in the inert material with large particle dimensions Device can be avoided.

Description

The arrangement of the fixtures in the device can, due to their multiple function, preferably in a spiral shape, but also at defined intervals offset by 180 ° with each other, in which case especially for reducing the kinetic energy of inert materials this by a slight inclination of the respective Inner sheets of 5-15 ° to the horizontal partially a spiral path in the tube is imposed. The inner plates are designed so that on the one hand they have a slope which is greater than the angle of repose of the material to be filled, but preferably 45-65 °, and that they allow a free cross-section in the filling, preferably similar to an ellipse, the Longitudinal axis exceeds the double particle diameter of the material to be introduced significantly and their smallest curvature is greater than that which is greater than that of the largest particles. It has been found that this elliptical shape has the advantage over a rectangular cross section that ζ. B. balls of corresponding sizes can only have a point of contact with the outer wall and so even with a small diameter of the filling bridge formations can be avoided. Depending on reactor height and number of catalyst beds, a plurality of pipe segments can be coupled to each other. Above the upper segment, a filling funnel is expediently provided, whose outlet should preferably have a diameter of less than 100 mm. The lower end of the device can be formed by a flexible hose, which allows a manual deflection of the stream, preferably when filled with inert material. It can be varied in diameter along with matching tapered transition pieces.

A flexible design of the holding device is advantageous. While in reactors with a catalyst bed a bracket is sufficient, multi-bed reactors, a second bracket is low, but in which the device is mounted only oscillating and so small deviations from the vertical position can be allowed when passing through the shelves.

The advantages of the filling device are that the destruction of the catalyst body is avoided and thereby no increase in. Pressure loss occurs in the catalyst bed.

The inert particles retain their shape and thus ensure a good transition of the reactor streams from one catalyst bed to the other. During filling with inert material and catalyst, the material flow is constantly deflected by means of the flexible end. For the filler there is no danger in the reactor as soon as the Mannloeh counterfilling filling material is secured.

Embodiment.

By way of example, the invention will be described in more detail:

Figure 1 shows schematically a multi-stage reactor with the filling device in longitudinal section. FIG. 2 shows the reactor filling device in section A-A

 Figure 3 shows one of the specially shaped inner panels.

The multi-segment device is assembled by closing the lower support 5 so as to cover the segment 6 already fixed to the segments 7-10 and the hose 11 after removal of the intermediate internals of the reactor in the penetration plane Construction is suspended pendulum. The upper bracket 1 has essentially a guiding function and is mounted after the segments 2-4 is placed on the segment 6 and fixedly connected to it.

The filling material passes through the funnel 12 into the device, where a part of its kinetic energy is converted into rotation or friction, and comes with an adjustable by the choice of the appropriate strength of the flexible hose speed in the interior of the reactor, where it through the Flexibility of the hose can be distributed as needed. When the bed has reached a certain height, either the flexible end can be replaced by another, or the device can be reduced segment by segment to the appropriate length.

Claims (2)

Invention claim: 1. Reactor filling of several segments, characterized in that in a tubular channel of diameter 100 to 200mm, but preferably 120 to 150mm, with an inclination of 45 to 65 ° to the channel axis inner plates (Fig. 3) at intervals of 250 to 600 mm along the channel, of which the segments (2-4 and 6-10) have elliptical-like cross sections with the clear width across the major axis greater than twice the diameter of the particles to be filled and a curvature greater than the largest particle diameter, a flexible tube ( 11) is attached to the lower outlet of the channel and the channel is attached to the brackets (1 and 5). 2. Reactor filling device according to item 1, characterized in that the inner plates along the segments of the filling roh res spiral ig or offset by 180 ° are arranged (Fig. 2) and have a lateral inclination of 5-15 ° to the horizontal. For this 2 pages drawings', Field of application of the invention The invention relates to a device with which it is possible to fill reactors also in a multi-bed design through an upper manhole both with inert material of large particle size and with catalyst. Characteristic of the known technical solutions Industrial reactors of the chemical industry are filled with catalyst, which has the properties of a bulk material. Large reactors are often designed in multiple stages with intermediate installations, so that large drop heights can lead to breakage of the catalyst bodies on the one hand, and targeted introduction of the catalyst into the lower beds in free fall not possible. The individual catalyst beds are often carried by intermediate floor. In order to create a sufficiently large void volume for the passing streams of material, but to prevent trickling through of the catalyst, preference is given to using inert support layers, usually of ceramic bodies of large particle dimensions. These ceramic bodies are often porcelain balls or cylinders with a diameter of up to 30mm, which are already destroyed at medium free fall heights due to their brittleness on impact. It is known that such bodies in narrow channels tend to bridge up to a multiple of their diameter. Measures are known to carry out the filling of large capacity reactors with catalyst and inert material with a flexible, hose, wherein the flow is achieved by changing the hose length. Another method is to introduce a container filled with catalyst or inert material in the reactor and then open. A third method involves the introduction of a square or rectangular channel with inner, adjustable, overlapping guide vanes, with which the catalyst can be gently led to a destination. When filling especially multi-bed reactors with flexible hose gentle treatment of the catalyst is not guaranteed, since it is dependent on subjective factors. When filling especially with inert material with a relative to the catalyst much greater density increases the strength stress of the tubing with the Befüllänge and achieves a no longer acceptable safety level. The filling with containers requires on the one hand because of the structurally limited manhole opening small container and accordingly a very large amount of time, on the other hand, in multi-bed reactions, the implementation of the container through the internal installations a constant threat to the entrusted with this task personnel. The filling with a channel rectangular or square cross-section, as described in DD-WP 203689, although solves the problems for the introduction of catalyst in a single bed, but is not suitable for the introduction of particles of large dimensions due to its design and shows more bridging because z. B. would have a part of the corresponding balls to be filled two points of contact with the respective passage cross-section, while in the ellipse-like cross section, the guarantee is given for only one point of contact. The device mentioned in WP 203689 shows no solution for a flexible particle distribution over the reactor cross section and no way for the filling of several underlying reactor beds with intermediate internals. Object of the invention The object of the invention is to provide a Katalysatorbefüllvorrichtung, which provides a rapid catalyst filling of multi-stage reactors with low mechanical stress of the catalyst, a strong reduction in the risk of clogging of the device and a uniform distribution of the catalyst in the reactor. Explanation of the essence of the invention The present invention has for its object to provide a device that allows the filling of multi-stage reactors through an upper manhole with both catalyst and inert material large particle diameter and the kinetic energy of these substances einzülenden so that professional dumps are guaranteed. According to the invention the object is achieved in that a filling device is introduced through an upper manhole, the core of which is a tubular channel with a nominal diameter between 100 and 200mm, but preferably between 120 and 150mm and its specially designed inner plates bridging, even when using Avoid spheres with a diameter of 30 mm, reduce the free fall distances for the materials to be introduced and allow uninterrupted, uniform flow of the catalyst with gentle treatment in multi-stage reactors even to the lowest bed.