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Structural characteristics of steaming balls
Date: 2023-09-18Read: 18
Steaming balls are the main production equipment for the pharmaceutical industry, papermaking enterprises, and food enterprises in the process of cooking liquids, pulp, and food.
1. Structure of Steaming Balls
The steaming ball is composed of three parts: a sphere, a base, and a transmission system, as shown in the figure.
Structure of Steaming Balls
1-7- intake pipe; 2-3- globe valve; 4- Safety valve; 5. Worm gear transmission system; 6- Check valve; 8- Spray bend pipe; 9 spray tube
The sphere is a thin-walled pressure vessel welded from boiler steel plates. An elliptical loading hole is opened above its vertical centerline. On the horizontal centerline, the two ends of the sphere are connected to two hollow steel shaft necks through flanges. The shaft necks are supported on two semi open oil ring bearings, which are fixed on a cast iron reinforced concrete base. The hollow shaft necks at both ends are connected to an intake pipe and a spray pipe. The intake pipe is located on one side of the transmission device, and a circular hole baffle is installed on the inner side of the shaft neck to prevent slurry from blocking the gas pipe. A check valve, a safety valve pressure gauge, a shut-off valve, and a check valve are installed on the steam pipe outside the ball in sequence. The check valve should be located closest to the ball to prevent black liquor from "flowing back" to the main gas pipe when the pressure inside the ball is high. The intake pipe intersects in a cross shape inside the ball to facilitate uniform gas distribution. On the other side, the shaft neck is connected to the spray elbow, which extends along the ball wall inside the ball to directly below the ball, 50mm away from the ball wall, and is connected to the spray valve outside the ball.
Some steaming balls are welded with several 16-20mm toothed metal rods on the inner wall to facilitate uniform mixing of the chips and alkali solution, and reduce wear on the inner wall of the balls. The ball wall is wrapped with insulation layer and iron sheet to reduce heat loss during steaming. There are also sampling tubes on the ball wall for sampling and chemical testing.
2Steaming ballsfeature
The structure of the steaming ball is simple, easy to operate, with the same volume, small surface area, material saving, less heat loss, and due to rotation, the alkali and material are evenly mixed, allowing for smaller liquefaction. But directly passing through the steam, the alkali concentration inside the ball changes greatly, occupying a large area and producing low slurry volume.