RU13627U1 - INSTALLATION OF BARBOTAGE-PULSATION PREPARATION OF BINDER OR SUSPENSION - Google Patents

Abstract

Installation of bubble-pulsation preparation of a binder or suspension, containing a hermetically sealed hydrolysis tank with a pressure relief valve on the exhaust gas pipe, a gas supply system, a perforated horizontally mounted gas distributor connected to the gas chamber, a pipe-shaped fluidized aeration suspension dosing system and a suspension discharge pipe, characterized in that in the gas chamber between the perforated gas distributor and the nozzle of the gas supply system installed cut gas gas distributor is made in the form of three disks - the upper fixed, the middle sealing and the lower movable, equipped with at least one group of matching holes, and a movable pipe with a hose having holes is built into the metering system pipe, and the free end of the outer pipe is equipped with a removable perforated a glass, the openings of which are compatible with the holes of the hose when the movable pipe is rotated, while the capacity of the hydrolyzer is divided by the perforated in the lower part of the diaphragm with two halves connected at the gas distributor surface and equipped with an additional exhaust gas pipe with pressure relief valve.

Description

Installation of bubble-pulsation preparation of a binder or

The solution relates to foundry production, namely, installations for the preparation of a binder or suspensions.

A known installation of bubble-pulsation preparation of binders and suspensions containing a sealed hydrolysis tank, a set of gas distribution tubes, a closed-loop gas supply system with an autonomous supercharger, a metering system for fluidized air suspension of refractory material directly into the binder volume, a bubbling gas cooling system (A.SS.SSSR No. 1196100, B 22 C 5/04, B 01F 13/00, 1985). The installation completely eliminates atmospheric pollution with dust and solvent vapors, but a set of gas distribution tubes quickly becomes clogged with suspension, when the gas supply is turned off, the gas supply system fills up; I am suspended. The air suspension of the refractory is poorly dosed through vertical tubes located with their free ends up, the inner surface of the tubes is wetted by a binder, and the dust sticks from the inside. Possibilities of pulsating pressure are not fully used, as a result of which the suspension contains lumps and a long time of paring is necessary.

MGOS6 B22C5 / 04, B01F13 / 00

suspensions. flue gas, gas supply system, perforated, horizontal

a gas distributor connected to the gas chamber, a metering system for the fluidized air suspension of the refractory in the form of a vertical pipe, lowered down with its free end, a pipe for draining the suspension. (B.I. Uvarov, E.A. Chernyshov, N.A. Kashchuba. Optimization of the preparation of binders and suspensions by the method of bubbling mixing. Technology and organization of production. Kiev. 1988, No. 2, pp. 31-33). Dosing aerosuspension of a refractory through a vertical pipe from above has several advantages. No plugs are formed during dosing, the refractory falls down under its own weight, is pulled in and is pushed out by air pressure. But the installation has low reliability and low moving efficiency, due to the following series of reasons. After stopping the dosage of air suspension of refractories through the pipe, the latter is filled with suspension and quickly overgrows. When dosing through a wide tube, bubbles form, for breaking which a special cap with perforation is required.

Bubbling gas passing through the gas inlet is unevenly distributed in the gas chamber. The study of gas-liquid emulsion velocity diagrams showed that in the central zone located directly above the gas inlet pipe, the emulsion rise rate and its gas saturation are much higher. As a result, a reduced gas pressure is created on the periphery of the gas distributor and leakage of the suspension is possible. When you turn off the gas

2 the chamber is filled with a suspension, which is why gas distribution quickly

clogs up. At the initial moment of installation operation, when the first portions of liquid components are filled in, a significant part of them flows into the gas chamber.

With a pulsating pressure relief by a special valve, the work of decompressing compressed gas dissolved in a suspension is inefficiently used. At the end of the discharge of the suspension, most of it falls through the openings of the gas distributor, as well as at the initial moment of bubbling, due to uneven back-up of the gas.

These shortcomings are eliminated by the proposed solution.

The task to be solved is the co-occurrence of the construction of the existing installation of bubble-pulsation preparation of a binder or suspension.

The technical result is an increase in mixing efficiency and reliability.

This technical result is achieved by the fact that in the installation of bubble bubbling and pulsating preparation of a binder or suspension containing a hermetically sealed hydrolysis tank with a pressure relief valve on the exhaust gas pipe, a gas supply system, a perforated, horizontally mounted gas distributor connected to the gas chamber, and a refractory fluidized air suspension dosing system in the form of a pipe and a pipe for draining the suspension, in the gas chamber between the perforated gas distributor and the pipe

5S / 3 I

3 gas supply systems: gas splitter installed, gas distribution

made in the form of three disks - the upper fixed, the middle sealing and the lower movable, equipped with at least one group of matching holes, and a movable pipe with a hose having holes is built into the pipe of the dosing system, the free end of the outer pipe having a removable perforated glass, the holes of which made with the possibility of combining with the holes of the hose during rotation, while the capacity of the hydrolyzer is divided by a perforated diaphragm in the lower part into two gasors communicating at the surface the distributor is half and is equipped with an additional exhaust gas pipe with a pressure relief valve.

The implementation of the device in the form of rotating tubes coaxially arranged in one another for periodic periodic dosing of solid and gaseous components into the volume of liquid allows hermetic closure upon stopping dosing, preventing the ingress of liquid inside. Depending on the nature of the bubbling gas (limiting solubility in the liquid being treated, chemical activity, density, etc.) and the liquid (viscosity, surface tension, wetting angle), bubbler treatment is more effective in small bubbles, in the other large ones.

4 hardening liquids, allows easy adjustment of dispersion

puzf'kov in the process of processing.

The implementation of gas dividers in front of the gas distributor allows you to equalize gas flows.

The combination of bubbling-pulsating-jet-liquid mixing in one tank due to the creation of different gas pressures in the adjacent halves of the tank, separated by a diaphragm, communicating through a small gap at the bottom j, allows the mixing process to be intensified and improves the quality of the finished product.

In FIG. I shows the installation of bubble-pulsation preparation of a binder or suspension.

In FIG. 2 - a device for dispensing aerosuspension of refractories in the volume of the binder.

In FIG. 3 - perforated gas distributor and gas divider.

In FIG. 4 - device for draining the suspension.

The installation consists of a container I with a cover 2, gas outlets 3,4 with valves 5, 6 and valves 7, 8 of a pulsating gas pressure relief.

The capacitance I of the hydrolyser is divided by a diaphragm 9 perforated in the lower part, dividing the capacitance I into the communicating through the gap between the diaphragm 9 and the gas distributor of half I and P. In the roof 2 there are manometers 10, 11, emergency pressure relief valves 12, 13, pipe 14 with valve 15 for supplying liquid constituents of the binder.

5/3

5

From the device for receiving aerosuspension of refractory components (not shown in the diagram) by pneumatic liquefaction through the material pipe 16, the air suspension is pneumatically transported to the device for dispensing the air suspension into the volume of the binder. The dispensing device consists of an inner rotating bottom perforated pipe 17 connected to the material conduit 16. The pipe rotates at a fixed angle between the stops of the handle 18. A rubber hose 19 with holes is put on the pipe 17 on the adhesive, the end of the pipe 17 is sealed with an easy-to-remove plug 20 for cleaning pipes 17 inside. Pschang 19 is coated with a sliding release agent (silicone fluid) and the perforated glass 21 of the outer fixed pipe 22 welded to the cover 2 is tightly fitted. The glass 21 is bolted to the pipe 22.

The perforated gas distributor is made of three disks of the upper fixed disk 23 made of thin sheet stainless steel, the middle sealing disk made of dense rubber 24, the lower metal movable disk 25, which receives the distributed load of the increased gas pressure. The disk overlay is fastened by a bolt 26, which regulates the degree of pressing of the disks 23 and 24, 25. A rubber disk 24 is glued to the movable disk 25. The pressing of the disks 23 and 24, 25 is also regulated by bolts 27 located around the perimeter. The movable disk 25 has a rotation 28 with three fixed positions all openings are closed, large openings are open, small openings are open. The upper disk 23 is stationary and contains one group of holes - large. Discs 24.25 have two groups of holes, small and large. Small diameter

holes - 1 mm, large - 3 mm. The surface of the sealing rubber disk 24 is coated with a release agent (silicone fluid), which allows rotation, prevents bonding of the disks 23 g 24.

The gas chamber W is made in the form of a cone, in the vertex of which (the lower point of the gas chamber) a plug 29 is installed for draining the condensate and removing it in case of emergency suspension. The chamber Ш is equipped with two gas supply pipes 30, 31 with valves 32, 33. In the gas chamber Ш between the gas distribution disks 23, 24, 25 and the gas supply pipes 30 and 31, a gas cutter 34 is made of a metal sheet with minute perforation over the entire surface.

The device for draining the suspension consists of a pipe 35 welded to the bottom of the tank I, a fixed disk 36 is attached to the pipe 35, a rubber disk 37 is glued to it, which is lubricated with a release agent. A disk 38, rotated by the handle 39, is attached to the fixed disks 36, 37. The drain is fastened with a bolt 40. A fitting 41 is welded to the disk 38, on which a hose is put on to drain the suspension from the tank I of the hydrolyzer. The inlet openings of the gas outlet pipes 3, 4 are provided with drop eliminators 42.43 in the form of a removable set of plates.

To measure the temperature of the reaction medium, the tank I of the hydrolyzer is equipped with a temperature-sensitive sensor 44 with a recorder.

When preparing the connecting hole of the perforated gas distributor discs 23, 24, 25 by turning the knob 28 in the closed position overlap. The nozzles 30 and 31 of the gas supply system with valves 32, 33 for adjusting the gas flow rate are connected to the compressed air line (5-6 atm.) Or through ball valves to cylinders with other gases, the valves 32, 33 are connected.

Solvents are poured into the tank I of the hydrolyser through a pipe 14 for supplying liquid components — cfc, acetone, acidified water. By turning 28 into the open position, small holes combine a group of small holes in the movable disks 24, 25 with a group of holes in the fixed disk 23, while supplying gas through the gas chamber Ш, the gas distributor to the tank I of the hydrolyzer.

Gas from the gas supply system through the nozzles 30, 31 enters the gas chamber III, passing through the gas divider 34, the gas flow is equalized in cross section, the pressure under each gas distribution hole becomes the same. Bubbling treatment (prehydrolysis) of the binder solvents begins. After 1-5 minutes of treatment, ethyl silicate or a solution of ethyl silicate in an organic solvent is poured through pipes 14, valve 15 is closed after dosing.

The valves of the pulsating pressure relief 7 and 8 are connected to the pneumatic system as follows. When bubbling through the gas distributor disks 23, 24, 25, the gas, partially dissolving in the binder, floats in the form of bubbles on the surface of the liquid, the gas pressure above the liquid begins to increase, therefore pressure reducers (not shown in the diagram) and valves 32 and 33 increase the flow and pressure bubbling gas. When creating a pressure of 5 bar in tank I. valve 8 relieves pressure; valve 7 is still closed. In half II of capacity I, due to a sharp pressure relief, dissolved gas is released from the liquid, it boils throughout the volume. The pressure in half of the container I temporarily remains the same, equal to 5 atm., The liquid is injected under pressure through the gap between the vertical diaphragm 9 and the gas distributor disks 23, 24, 25 into half P. At the same time, all solid inclusions are washed off the gas distributor’s surface, a strong flow is twisted , the fluid level in half II rises rapidly. Further, connected through a control pneumatic system, valve 7 opens at the signal from valve 8, and the pressure drops to 1 atm. in the first half, both valves 7 and 8 are open. But in reservoir I, hydrostatic equalities with a difference of 10-20 cm formed on opposite sides of diaphragm 9. Therefore, when the pressure is released in both halves of the reservoir, the levels tend to level out, and the binder under the diaphragm 9 flows back. Again, a swirling fluid flow is created on the surface of the gas distributor. Stirring is intensified further due to the fact that the diaphragm 9 has a perforation in the lower part. 9 I. By pressure gauges 10, And regulate the pressure in the halves of I and I capacitance

by adjusting the valves 7 and 8. The temperature is determined by the sensor 44. Due to the entrainment of heat by the exhaust gases, the reaction volume does not overheat above 32-38 C. At the end of preparation of the binder, create a pressure in the tank slightly below 5 atm. so that valves 7 and 8 do not work. overlap the openings of the disks of the gas distributor 23-25, open the device for draining the binder and suspension by turning the handle 39 to the open position. In this case, the hole in the movable disk 38 with the fitting 41 is aligned with the nozzle 35 and the product flows out of the container under pressure I. The height-adjustable support 45 is shortened by screwing, the gas distributor plane tilts towards the drain pipe 35, which further accelerates the process of releasing the container. Close the valves 32, 33, unscrew the plug 29 to drain the condensate.

To prepare a suspension or hydrolysis of ethyl scotchate in a combined way after 5-10 minutes. bubbling of all constituent compounds) aerosuspension of refractories from material pipeline 16 is loaded into the tank I of the hydrolyzer from the device for obtaining aerosuspension of refractory components (not shown in the diagram). Fire-resistant filler from the material pipe 16 enters the inner tube 17 of the dispensing device. For the introduction of the device into operation, the inner pipe 17 is tied up by the handle 18, while the otersty of the inner pipe 17 and the perforated glass 21 coincide. The air suspension is dosed through pressurized openings into the binder volume. Refractory air bubbles

ten

particles float to the surface, for example, the particles of the refractory are wetted with a binder and drawn into the liquid, and the gas bubbles burst and the gas passes through the drop eliminators 42, 43 and enters the exhaust pipes 3, 4. The suspension of air suspension is stopped by turning 18. The refractory can be loaded with and when the reformed gas distributor is off (disks 23, 24, 25). After the refractory is loaded, the hydrolysis process is carried out and the suspension is prepared as in the preparation of the binder. The finished suspension is drained in the same way as the binder.

Tests conducted in the pilot production showed a high efficiency of the installation and its industrial applicability. eleven (

Claims (1)

Installation of bubble-pulsation preparation of a binder or suspension containing a hermetically sealed hydrolysis tank with a pressure relief valve on the exhaust gas pipe, a gas supply system, a perforated horizontally mounted gas distributor connected to the gas chamber, a pipe-shaped fluidized air suspension dosing system, and a pipe for discharging the suspension, characterized in that in the gas chamber between the perforated gas distributor and the nozzle of the gas supply system installed cut gas gas distributor is made in the form of three disks - the upper fixed, the middle sealing and the lower movable, equipped with at least one group of matching holes, and a movable pipe with a hose having holes is built into the metering system pipe, and the free end of the outer pipe is equipped with a removable perforated a glass, the openings of which are compatible with the holes of the hose when the movable pipe is rotated, while the capacity of the hydrolyzer is divided by the perforated in the lower part of the diaphragm with two halves connected at the gas distributor surface and equipped with an additional exhaust gas pipe with pressure relief valve.