SU1624017A2 - Hydraulic cutter - Google Patents

Abstract

The invention relates to ic devices for hydraulic unloading of petroleum coke from reactors of delayed coking plants and is an improvement of the known hydraulic cutter according to the authors. St. N 1312088. The purpose of the invention is to accelerate the discharge and improve the uniformity of the particle size distribution of the unloaded coke. The cutter includes a housing 1 with a switching device, drilling nozzles 6 and coaxially arranged cutting nozzles 7, under each of which an additional cutting nozzle 8 is installed. When switching the hydrocutter from drilling mode to cutting mode and increasing the water pressure on the end faces of nozzles 7 and 8 The outlet openings of these nozzles are rotated at a predetermined angle to each other, reducing the cutting step when removing the coke array from the nozzles and maintaining the speed of movement of the cutter in the chamber. 1 il. (L with about yu а y and

Description

The invention relates to equipment for delayed coking plants, in particular, to devices for hydraulic unloading of petroleum coke from chambers of delayed coking plants.

The purpose of the invention is to accelerate the discharge and increase the uniformity of the particle size distribution of the unloaded coke.

The drawing shows a hydraulic cutter, cut.

The hydraulic cutter has a cylindrical body 1 with a lid 2 and an internal cavity 3 in which vertical shafts 4 are placed for supplying water to the drilling nozzles 6 installed in the drill head 5. The cutting nozzles 7 are coaxially arranged in the housing 1, another one is installed under each of them nozzle 8. The outlet openings of nozzles 6 and 7 are offset from the axis of the nozzle. Nozzles 6 and 7 are provided with protrusions 9 and mounted on the threaded connection in the housing 1 with the possibility of rotation.

An annular recess 10 is made in the housing 1 at the junction with each nozzle, in which a spring 11 is installed, one end of which rests against the protrusion 9 of the nozzle 6 or 7 and the other end into the cap nut 12 fixed in the housing 1. In the upper part of the housing there is switching device. The body of the hydraulic cutter is protected from mechanical damage by kerchiefs 13.

The cutter works as follows. The cutter attached to the lower end of the drill rod is lowered into the chamber to the upper level of coke and the pump is turned on to supply high pressure water. Water under pressure of 12.0-12.5 MPa, sufficient for drilling a vertical well, through the neck of the cover 2 of the housing 1 enters the vertical trunks 4 into the drilling head Biv of the nozzle 6 and, having flowed out in the form of jets, drills the central well. Then the water pressure is increased to 16.0 MPa and the well is expanded.

After the end of the drilling, the water cutter is switched from the drilling mode to the cutting mode. Water through the neck of the cover 2 of the housing 1 enters the cavity 3 and the cutting nozzles 7 and 8. At the same time, the water in the cavity 3 acts on the end of the nozzles 7 and 8, but this pressure is not enough to compress the springs 11.

Therefore, the nozzles 7 and 8, located one under the other, are in a position where the outlets are maximally separated from each other. By rotating the cutter and simultaneously moving it down the height of the reactor, two notches-slits are cut in the coke array, between which the ring of coke breaks off. After one vertical pass, the cutter is raised

water pressure. In this case, a pressure difference appears in the cavity 3, which is sufficient for compressing the springs 11. When the springs are compressed, the nozzles 7 and 8 move along the threaded connection, acquiring

rotational movement, and the outlet openings of the cutting nozzles 7 and 8 are rotated at a predetermined angle to each other, reducing the cutting step when removing the coke array from the nozzles and maintaining the speed of movement of the cutter in

the camera. The next vertical movement and rotation of the hydrocutter removes the next layer of coke, etc.

Thus, the design of the improved cutter allows for

removing the coke mass from the cutter nozzles to reduce the cutting step required for cleaving the coke annular layer between adjacent notches, by bringing the output nozzles of the cutting nozzles closer together,

located one above the other at the maximum speed of the torch. It . accelerates the discharge of coke from the chamber. In the prototype, the cutting step as the coke array is removed from the cutter nozzles is reduced by reducing the speed of the cutter movement, which increases the unloading time of coke.

In addition, adjusting the cutting pitch by varying the angle of inclination of the nozzles located one under the other allows the cutting pitch to be expanded to degrade the coke, which ensures that the coke has a more uniform grain size distribution.

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Claims (1)

Invention Formula Hydraulic cutter on the bus. St. No. 1312088, characterized in that, in order to accelerate the unloading and increase the uniformity of the particle size distribution of the discharged coke, it is equipped with additional cutting nozzles placed one below the other and installed with the possibility of changing the angle between them.