RU122039U1 - DEVICE FOR DOWNLOADING THE REFORMING PIPES CATALYST - Google Patents

Abstract

A device for loading reforming pipes with catalyst, consisting of a hopper and a brake with beams, characterized in that the brake is an air fall retarder made of a fitting in the form of a pipe segment inserted into a glass in the form of a pipe segment with a tightly closed one end with rigidly fixed on glass and fitting with beams made of plates, orienting the device in the center of the reaction tube, and a hose marked with the immersion depth is put on the fitting, which is wound on a reel-reel with a rotating joint, while a pressure gauge and a valve are installed on the compressed air supply line, and a hopper is made in the form of a flattened container, to the bottom of which a groove with slotted holes is rigidly attached, while the hopper support is made of a corner with fixing pins.

Description

The utility model relates to the process of loading catalyst granules into tubular furnaces and reactors and can be used in the chemical and oil refining and metallurgical industries for the production of hydrogen, for example, primary reforming in the production of ammonia and methane.

Currently, when loading vertical pipes, intermediate containers are used, made of fabric or polyethylene in the form of long sleeves open on one side. The containers are filled with loaded particles, and the containers are made in such a way that the diameter of the filled sleeves is 10-20 mm less than the diameter of the pipe. The open end of the sleeve is bent and then the container is lowered into the pipe using a cable tied to the other end of the container. When the lower end of the container reaches the surface of the loading layer, the container is shaken sharply and through the open end of the container, the loaded particles come from the container into the layer. (Catalyst Handbook. Ed. By Martyn V. Twigg. Wolf Publishing Ltd. 2 Edit. 1989. p. 156-162).

A disadvantage of the known device is that when loading the catalyst into pipes 10-14 m high, the probability of destruction of the catalyst granules is high, in addition, an inhomogeneous catalyst layer is formed along the height of the pipe.

The closest technical solution of the device is a device for forming dense catalyst layers, consisting of a hopper, a metering system, characterized in that it has a cable with a brake attached to it, which is made in the form of a tubular split rod with a tiered arrangement of hard beams coated with elastic material and mounted on a cable with a spring-loaded clip, and the distance between the tiers is 2-5 characteristic sizes of the catalyst granules (patent RU No. 2250132, IPC 7 B01J 8/06, B01J 4/00, published on 04/20/2005).

A disadvantage of the known device is that the brake restricting the free fall of granules, striking the brake rays several times until it reaches the bottom of the pipe 10-14 m, the probability of destruction of the granules remains, another disadvantage is the labor and time required to assemble and disassemble the brake. The dosing system also requires costs, for equipment, settings.

The objective of the proposed utility model is to increase the efficiency of the reaction reforming tubes.

The technical result consists in the uniformity of the laying of the catalyst granules around the circumference of the reaction tube, maintaining their integrity, and increasing the loading speed and, as a result, increasing the service life of the catalyst and reaction tubes.

The technical result is achieved by the fact that the device for loading the reforming pipe by the catalyst consists of a hopper and a brake with beams, while the brake is an air drop retarder made of a fitting in the form of a pipe segment inserted into a glass as a pipe segment with one end tightly closed tightly closed beams fixed on the glass and the nozzle, made of plates, orienting the device in the center of the reaction tube, and a hose with a marking of the immersion depth, which is wound on the barre, is dressed on the nozzle with the compound rotary-coils, thus on the compressed air supply line valve and pressure gauge and the hopper is formed as a flattened container, whose bottom is fixedly secured chute with slotted holes, wherein the hopper is made of corner support with locking pins.

The device is illustrated by drawings:

figure 1 presents an air moderator fall side view in section;

figure 2 presents the air retardant fall top view;

figure 3 General view of the device for loading the catalyst reforming pipes.

The device is characterized in that it creates an air flow from the catalyst layer towards the falling granules, where the granules “hang” sink to the bottom of the pipe at a lower speed.

The fall retardant of granules 1 (Fig. 1, Fig. 2) consists of a fitting 2, in the form of a pipe segment that is inserted into the glass 3, in the form of a pipe segment with one end tightly closed, with fixed beams 4, orienting the device in the center of the reaction pipe 18, a hose 5 is put on the nozzle, which is wound on the drum-coil 6 (Fig. 3) by a rotating connection 7, the drum-coil 6 is connected to the compressed air line 8 by a rotating connection 7, the incoming air is regulated by a valve 9 and controlled by a pressure gauge 10 to fix the unwinding used rattles ka 11.

The fitting 2 is rigidly fixed in the center of the cup 3, the area S of the gap between the cup 3 and the fitting 2 is 1-2 S of the inner diameter D of the fitting 2. Example; if we take an inner fitting D 18 mm taking into account a wall thickness of 2 mm outer D 22, then the inner D of the cup should be 28, but if the standards do not have pipes of this diameter, take D30 or D32, but should not exceed 34 mm (figure 2) , S clearance = 1-2 S of internal D fitting). Also, the gap between the nozzle and the bottom of the cup should be sufficient (Fig. 1), the length of the nozzle should be sufficient, the air stream leaving the cup should not receive resistance from the hose 5 worn on the nozzle 2, you can sharpen the hose 5 (grind it), you also need to sharpen it the end of the fitting 2. The beams 4 are made of plates attached along the length of the beaker 3, the beams are needed to orient the device in the center of the reaction tube without distortion, the distance between the upper and lower edges of the rays should be greater than the inner diameter of the pipe to prevent distortion the corners are rounded .. If the fitting in the glass is skewed, the device can begin to rotate by twisting the hose, and even worse, the granules will lie on one edge of the pipe, which will lead to the formation of arches and voids. A similar situation will be if the beams are welded crookedly. Since there is no single standard for the inner diameter of the reaction tubes, a number of devices are manufactured, and on the spot they are adjusted to the desired diameter, cutting off the rays of the finished device, taking into account welds, they are not always ideal.

For compactness and convenience, a flexible thin-walled hose 5 is selected, 15-25 m long, the hose is marked with numbers in increments of every meter starting from device 1, and after 0.5 m with a dash, hose 5 is wound on reel 6. Sometimes it makes sense to duplicate the hose with a cable D1-3 mm. The drum-coil 6 is connected to the compressed air line 8 by a sliding connection 7. A ratchet is used to fix the unwinding 11. The incoming compressed air from the source is regulated by a valve 9 and controlled by a pressure gauge 10. The fastener (not shown) on the rear wall is screwed or suspended.

The hopper 13 (figure 3) is a capacity of 12-15 liters, flattened from below. The gutter 14, made in the form of a tape 200-250 mm wide, with slotted holes up to 2/3 of the size of the granules (for screening dust and small particles), is rigidly attached to the bottom of the tank, at an angle to the horizon 10-30 degrees, bent U- in a figurative way. A metering valve 15 is installed in the groove 14 at the outlet of the hopper 13. To prevent the air flow from interfering, the hopper 13 is offset 1-3 times the diameter of the reaction tube from the flange, placed on the stand 16 made corner ties, the fixing studs 19 enter the holes of the flange 17 The hopper can be removed from the flange only by lifting and tilting it forward by pulling out the studs.

A device for loading the described construction works as follows.

Before loading, the hose with compressed air 8 is pulled into the rows of reaction tubes, connected to the drum reel 6, which is suspended above the tube 18, the ratchet 11 is placed in a neutral position, the hose 5 with the device 1 is lowered into the loadable reaction tube 18, unwinding the drum reel 6, look at the depth marking on the hose 5, raise the device 1 by 0.5-2 m and fix the ratchet 11. Open the valve 9, supply compressed air to the device 1, controlling the pressure with a pressure gauge 10, according to the mode for a given pipe inner diameter. The hopper 13 is mounted on the flange 17, the catalyst is poured from the measuring device (bucket of 5-10 l). Open the shutter of the dispenser 15 with the calculation of the output of several granules at a time. Granules should not overlap more than half the diameter of the reaction tube 18 (unacceptable volley passage of granules).

As the reaction tube 18 is filled, the device 1 is lifted using a drum-coil, monitoring the volume of the catalyst and the marking on the hose 5, sometimes the device 1 is lowered until it touches the catalyst 12 to determine the height of the filling of the reaction tube with the catalyst. At the end of the loading of the reaction tube 18, the hose 5 with the device 1 is transferred to the adjacent reaction tube, if necessary, the drum-reel is outweighed, we begin the loading there. And here we measure the resistance, verify the data, bring to condition.

It is necessary that the device 1 is located above the catalyst bed 12, if it is in the catalyst layer 12, voids can form, that is, the quality of laying is impaired, and if the device is blocked in the pipe by 0.5 m or more, there will be a problem to get it out of there.

The use of this device allows you to lay granules evenly without arches, cavities and dust plugs, without fear of destruction of the catalyst granules, while increasing the loading speed and, as a result, increasing the life of the catalyst and reaction tubes.

Claims (1)

A device for loading reforming pipes with a catalyst, consisting of a hopper and a brake with beams, characterized in that the brake is an air drop retarder made of a fitting in the form of a pipe segment inserted into a glass as a pipe segment with one end tightly closed and rigidly fixed to the glass and the nozzle with beams made of plates orienting the device in the center of the reaction tube, and a hose with a marking of the immersion depth is worn on the nozzle, which is wound on a drum-coil with a rotating of the connections, thus on the compressed air supply line valve and pressure gauge and the hopper is formed as a flattened container, whose bottom is fixedly secured chute with slotted holes, wherein the hopper is made of corner support with locking pins.