Caustic soda flake machine drum for solid caustic soda producing system

Abstract

The invention discloses a caustic soda flake machine drum for a solid caustic soda producing system. According to the caustic soda flake machine drum, the problems in the prior art that a cylindricalcasing has multiple cracks and a smooth outer surface; shape and size of a finished product of a caustic soda flake are irregular, a left flat cover and a right flat cover are seriously corroded, fixed hollow shafts are easily worn, a spraying empty zone exists and a spraying effect is poor are solved. The caustic soda flake machine drum is characterized in that the cylindrical casing is formed bycoiling the whole nickel-based alloy N02201 plate and welding; spiral chutes are processed in the outer surface of the cylindrical casing; anticorrosive lining plates are welded on the outer edge ofthe left flat cover and the outer edge of the right flat cover; a needle roller bearing is arranged in an annular clearance between each rotational hollow shaft and the corresponding fixed hollow shaft; the lengths of six longitudinal spraying pipes are different; the six longitudinal spraying pipes realize an effect of diverting water towards six directions and are centrally arranged in a causticsoda flake forming area. The caustic soda flake machine drum has the beneficial effects that soda liquor is sprayed on the outer surface of the cylindrical casing to form caustic soda flakes with uniform and regular shapes and sizes; wear of the fixed hollow shafts is avoided; the service life of the drum is prolonged, a good spraying effect is realized, and spraying water is saved.

Description

technical field [0001] The invention belongs to the technical field of solid caustic soda production equipment, and in particular relates to a flake soda machine drum used in a solid caustic soda production system. Background technique [0002] The drum of the caustic soda machine is the core equipment in the solid alkali production system. Its working principle is that the 32°C cooling water enters the spray device inside the drum through the fixed hollow shaft at the water inlet end, and is diverted by the spray device to spray evenly on the On the inner surface of the drum cylindrical shell, the 420°C lye is evenly sprayed on the outer surface of the drum cylindrical shell through the upstream equipment, and the cooling water cools the lye through the drum cylindrical shell, and the lye is solidified on the outer surface of the drum cylindrical shell Above, the 50°C solid alkali is scraped off by the scraper on the auxiliary equipment to form a 20mm×20mm×(0.8~1.5)mm caulk...

AI Technical Summary

Problems solved by technology

[0004] (2) Since the cooling water at 32°C enters the spray device inside the drum through the left fixed hollow shaft, it is diverted by the spray device and sprayed on the inner surface of the drum cylindrical shell, and the lye at 420°C passes through The upstream equipment is sprayed on the outer surface of the cylindrical shell of the drum, so the temperature difference between the inner surface and the outer surface of the cylindrical shell of the drum is large, and the outer surface of the cylindrical shell of the drum is prone to cracks and weld cracks, while Once the outer surface of the cylindrical shell of the drum has cracks and weld cracks, the lye will enter the inside of the drum and flow with the cooling water, which will easily cause corrosion on the inner surface of the cylindrical shell and affect the safe use of the drum;

[0005] (3) Due to the poor corrosion resistance of carbon steel, the ends of the left flat cover and right flat cover made of carbon steel and the side of the weld of the cylinder made of carbon steel are in the alkali solution, soaked for a long time, and the corrosion is serious , affecting the service life of the drum;

[0006] (4) Since the copper sleeve is installed between the inner surface of the rotating hollow shaft and the outer surface of the fixed hollow shaft, the contact area is relatively large. After the drum runs for a long time, the fixed hollow shaft is easy to wear, and the fixed hollow shaft wears out after the drum It cannot operate safely, and the fixed hollow shaft needs to be replaced frequently, which affects production efficiency and wastes resources;

[0007] (5) Since the shell of the drum is a cylinder, the length of the spray pipe of the spraying device is single, the spraying is uneven, there is a spray space, and the spraying effect is poor, which affects the formation of caustic soda, and along the drum Spray the entire circumference, wasting water for spraying

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