SU1623556A3 - Method and installation for producing sulfur granules from liquid phase - Google Patents

Abstract

The present invention relates to a method and apparatus for obtaining sulfur granules from a liquid phase and reduces environmental pollution by reducing the dust content in exhaust gases. The method for obtaining sulfur granules from a liquid phase involves supplying droplets of liquid sulfur from the top and countercurrent flow of cooling air from the bottom for cooling the granules to the same temperature, with the air velocity in the lower part of the column being kept constant, in the middle part of the {g column the air velocity gradually w W о N5 co wielded SP oic

Description

is increased to a certain value and kept constant in the expanded section 3 of the column, which is the dust moistening zone 11, then the air is directed to the gas discharge zone 12, Sulfur is supplied to the sprinkler 4 through the pressure regulator 6, and the pressure increases with decreasing temperature the environment. In zone 11, dust collection maintains an air flow velocity not higher than 0.4 m / s, in zone

12, the emission of gases simultaneously changes the direction of air flow and gradually increases its velocity to the magnitude of the air velocity in the expanded section 3 of the column. Sulfur is supplied to the sprinklers at the highest ambient temperature under pressure above 5 kPa and at the lowest ambient temperature under pressure not higher than 40 kPa. 2 sec. and 2 hp ff, 1 ill.

This invention relates to a process for the preparation of sulfur granules from a liquid phase and a plant for carrying it out. 20

The purpose of the invention is to reduce the contamination of the medium by reducing the dust content in the exhaust gases.

The drawing shows the scheme of the proposed installation.

The plant for obtaining sulfur granules from the liquid phase contains a column closed below, having in the lower part a section 1 of a constant cross section connected to an expansion up to the top of a cone 2 passing into an expanded section 3 of a constant cross section, sulfur sprinklers 4 located in the expanded section 3, the column, and the inner shell 5, located around the 35th sprinkler head 4. The unit is equipped with pressure regulators 6 connected to the sulfur sprinkler 4, the upper parts of the column and shell are shaped boiling a truncated external 9 and internal cones 10 towards the large bases downwards and connected respectively to the expanded section of the column 3 and the shell 5 "45 Inner cylinder 8 above the sleeve 5 of the outer cylinder 7 of the column.

The angle of inclination of the side of the inner cone 10 is greater than 35e and greater than the angle of inclination of the side of the outer cone 9 o

The space in the expanded cylindrical part of the tower between the lower part of the spray zone and the upper part of the cone of the spray zone 5 is the dust-collecting zone 11. In the upper part of this cylindrical section there is a spray section with spray arms 4,

to which sulfur is fed through the pressure regulator 6, which allows automatically and manually adjusting the pressure of sulfur. The conical spray zone — the cone 2 at the bottom passes into the cylindrical section, which is the pellet formation zone and passes into the conical lower part of the column, closed from the bottom of the grate . Air is supplied to the tower through the pipeline, and the pellets are vented through the chute.

Example “At an ambient temperature of 305 K, liquid sulfur is at a temperature. 398 K through the pressure regulator 6 is fed to the spray arms 4 with 1.25 mm openings under a pressure of 11 kPa. From the sprinklers 4, the sulfur comes out in the form of thin jets in an amount of 40 tons per hour, randomly sprayed in the form of droplets, of which at least 75% have a diameter of 1.6-2.0 mm.

When the ambient temperature is lowered, the pressure of sulfur supplied to the sulfur sprinklers increases. At an ambient temperature of 295 K, sulfur is supplied to the sprinklers under a pressure of 18 kPa in an amount of 56 t / h. Air is supplied to the tower through the pipeline always in the same amount of 200,000 me / h. Having reached the dust-collecting zone 11, the air has a speed of 0.4 m / s. “This speed is maintained at the same level throughout the dust-collecting zone 11, which has a height of 5 m. Together with the air, dust-like sulfur is fed into the dust-collecting zone, supplied with air to the upper part of the tower, and undergoes a process similar to slurry. This dust is in contact with

Sulfur drops contain trapped dust, which is the center of crystallization and harden when dropped into the lower part of the tower. Air with dust that was not caught in the trap zone 11 falls into the space between cones 9 and 10 forming gas emission zone 12. Due to the change in the speed and direction of the air flow in this space, very fine dust forms agglomerates and settles on the walls of the inner cone 10, then rolls off them and falls into the capture zone 11, where it is absorbed Falling sulfur droplets are injected. Technological air containing 0.043 g / m3 of pulverized sulfur is ejected from the tower at a speed of 6 m / s through an annular opening in the upper part of the tower, limited by cylinders 7 and 8 "

Claims (4)

Claims 25 1 A method of obtaining sulfur granules from a liquid phase, comprising supplying sulfur to sprayers located in the upper part of the column, supplying drops of liquid sulfur from above and feeding countercurrent cooling air from below to cool the pellets to the same temperature, while the air velocity in the lower part of the column is kept constant , in the middle part of the colony, the air velocity is gradually increased to a certain value and kept constant in the the section of the column, which is the catch-Q zone of the shell of the shell above the outside dusting of the dust, then the air is directed to the gas emission zone, characterized in that, in order to reduce the pollution of the environment by reducing the dust content. gases, sulfur is fed to the sprayers „3, about tl and - that the angle of inclination 45 lindra columns. 4. Installation on the side with the inner cone on the side more than 35 ° and more than the angle of the side of the outer cone 0 five five under controlled pressure, which increases with decreasing ambient temperature, in the dust collection zone, the air flow rate is maintained at no higher than 0.4 m / s; in the emission zone of gases, the direction of air flow is simultaneously changed and its velocity is gradually increased to a value higher than the air velocity. in the expanded part of the column. 2. The method according to claim 1; characterized in that sulfur is supplied to the sprinklers at the highest ambient temperature under pressure above 5 kPa and at low ambient temperature at a pressure below 40 kPa0 3. An installation for obtaining sulfur granules from a liquid phase, comprising a bottom-closed column having a fixed cross section in the lower part, connected to an upward-extending cone passing into an expanded constant cross section, sulfur sprinklers located in the expanded column section, and an inner shell located around the sprinklers, so that, in order to reduce environmental pollution by reducing the dust content in the exhaust gases, it is equipped with pressure pressure regulators connected Sulfur sprinklers, the upper parts of the column and the shell are shaped like cylinders, which go over into truncated cones, directed downwards with large bases and connected respectively to the expanded section of the column and the shell. „3, about tl and - that the angle of inclination lindra columns. 4. Installation on a flange so that on the side of the inner cone is greater than 35 ° and greater than the angle of inclination of the side of the outer cone