SU4541A1 - Apparatus for introducing liquid cement slag into a rotary kiln - Google Patents

Description

an apparatus for introducing a liquid cement slurry into a rotary kiln.

to the patent of the in-ts T. Rigby (T. Rigbi), D London, Velikobrilani, dated October 2, 1925 (for Article svnd. No. 4S26).

About the patent's patent was published on August 31, 1028. The validity of the patent extends for 15 years from August 31, 1928.

The present invention relates to apparatuses for injecting a liquid cement slab into a rotary kiln using movable nozzles that spray jet streams at various locations in the kiln drum. In order to protect the nozzles from the effect of high temperature, they are enclosed in an apparatus in a moving box, installed in front of the dust collector. camera against usto oven drum.

In FIG. 1 shows a longitudinal vertical section of the proposed device; FIG. 2- horizontal section of the device; FIG. 3 is a longitudinal vertical section of an apparatus for feeding a cement slab to a kiln in a sprayed state; FIG. 4 - the same, with scrapers to remove deposits of the sprayed mixture; FIG. 5 and 7 details; FIG. (b) vertical section of the lower part of a dust collector of a chamber adapted for cooling of furnace gases.

As can be seen from FIG. 1 and 2, the upper end of the furnace drum 3 is the inlet; - r into the dust-separation chamber, through the back wall 5 of which there are three cement-sprayable nozzles b, 7 and 8 (Fig. 3). These nozzles eject the liquid cement slit into the furnace for various distances, so that the mixture stream, for example, from the nozzle b, receives a diameter equal to the internal diameter of the furnace, near the line aa, the stream from. nozzles 7 are near the / -If line and jets from the nozzle are 8 of the c-c line (Fig. 2). The nozzles are installed at a certain slight angle to each other so that their axes converge, as a result of which the jets emerging from them intersect and penetrate each other. The sprayed cement slurry jets enter the gas space 9 through circular apertures 11 (Fig. 3) arranged in the end wall of the crate 13, which is fixed in a manner 15 in the direction of the axis of the furnace in the aperture 15. (Fig. 2)

walls 5. Each nozzle is fixed on the carriage 17, which, by rotating screw 19, can be installed to install the nozzle axially in relation to the tubular casing 21. In the casing 21 itself, there are holes (not shown in the drawing), which are the cement mixture collected in the casing can be removed in the drain chute 25. The casing 21 is secured in the proper position in chamber 13 with three or more clamping screws that radially extend from the ring 27 attached to the chamber. It can be directed at a desired angle to the axis of the furnace. In the end wall of the housing there is a bolt 29 which, resting against the end wall of the crate 13, facilitates installation of the housing in the axial direction. A tubular casing 21 with an opening 23 in relation to which the nozzle can be rearranged serves to control the amount of material sprayed into the furnace by means of a plate provided with openings or a diaphragm dispersed in the jet coming out of the nozzle. The part of the jet striking the diaphragm does not fall into the furnace, and, gathering together, it again turns into a liquid mass flowing from the furnace through the grooves 25.

A crate 13 with holes 11 through which the cement splashes pass into the kiln allows the spray nozzle or other diffusing device to be brought close to the kiln, protecting it from the effects of gases and heat and allowing easy access to it. for inspection.

The cement slurry is supplied to the nozzles in such a way that the pressure or pressure difference required from the nozzles is maintained as far as possible during the entire operation of the device. This is most easily achieved if, for all, nozzles, one

a pressurized system supplying them with a mixture, wherein the power supply of different nozzles is made by attaching each nozzle to the system in that .lecTe, where .ehtc requires a pressure value. Thus, for example, the mixture-supplying pump can feed a certain pipeline under pressure, which can be split between the pump and the final discharge point by appropriate sections for sections, the pressures of which differ from each other, for example, 20 psi, so that, for example, One nozzle can be attached to a section with a pressure of about 70 pounds, the other nozzle is connected to a section with a pressure of about 50 pounds, etc. It can be arranged that the pump forcing the cement mixture supplies it to an open tank located at a certain height above the ground. chech; From this tank, the mixture can flow simultaneously to one of the nozzles and to another open tank lying at a lower height than the first one. From the second tank, the slit can flow to the second nozzle and to the third tank, located slightly lower, but still known height above the stove, etc.

The sizes of the particles into which the cement mixture breaks down when it is sprayed have a significant effect on the resistance represented by these particles to the gas that entrains them, because the larger the particles, the more difficult they are to move by gases and the greater the pressure required.

In order not to interrupt the process of burning cement in case of cleaning or repairing nozzles b-8, you can use the usual pipe supplying cement mixture, inserted into hole 31 (Fig. 1) and adapted to quickly move it from working to non-working position, so that removing this pipe from the action it was outside the floor of the sprayed mixture, which is such

through the open, arranged in a chamber near its upper edge.

If the mixture from the dust collecting unit is fed directly to the pumping equipment, it is forced to flow into the discharge chute 47 through a series of vertical cuts in the board 43 (FIG. B) forming the wall of the part 41, which can be rearranged to either side for adjustment the size of the gap between the board 43 and the shovel 45 (Fig. 7). The latter is attached to one of the shoulders of the broomstick 39 and serves to drop from the board 43 into the moving cement mass of such pieces of already partially dried material which do not pass through the cuts of the board 43.

Concentration of cement slurry by evaporation using gases leaving the kiln cannot be a factor of any significant economic importance if the cement slurry was sprayed properly in the kiln, as in this case gases can be forced out of the kiln at relatively low temperature, for example, about 150 C.

The subject of the patent.

Claims (6)

1. An apparatus for introducing a liquid cement slurry into a rotary kiln in the form of several spray jets directed on various .vecra walls of the furnace drum, characterized by the use of box 13, re-installed in the opening 15 of the dust collecting chamber against the mouth of the furnace drum 3 and enclosing the box 21 with nozzles b, 7, 8, to change the angle of inclination of the rings 27 with set screws, and for the longitudinal movement of the nozzles in the boxes 21, carriages 17c are provided with screws 19 (Fig. 1-3). 2. In the apparatus of claim 1, the use of devices for communicating a different pressure head to different nozzles. 3. In the apparatus of claim 1, using the scraper 50 for cleaning the mouth of the furnace drum from the drain of the accumulator on it (Fig. 4-5). 4. In the apparatus of claim 1, the use of a rotating scraper 55 for cleaning the front wall of the drawer 13 from the hopper (Fig. 4). 5. In the apparatus of claim 1, the supply of the device, in addition to the spray-nozzles of the nozzles, is a spare tube 31 for introducing the slot 3 as a continuous jet. 6. In the apparatus according to claim 1, supplying the lower part of the dust collecting chamber with spacers 39, 39 for mixing cement glue or other liquid passing through the lower part of the dust collecting chamber for the purpose of cooling. furnace waste gases. , /. / - /. to the patent in-tsa T. RIGBI number 4541. .