Brewery Setup Blog

Structural and Technical Requirements of whirlpool Sedimentation Tank

(1) The whirlpool sedimentation tank is a flat-bottomed closed cylindrical container with a slope of 2% at the outlet. The new whirlpool sedimentation tank generally has an insulation layer to prevent the wort from cooling. In order to better collect thermal solidification, a conical thermal solidification collection cup is installed in the center of the bottom of the whirlpool sedimentation tank. The wort enters the tank along a tangential line, and there are mostly two inlets: one is at the bottom of the tank to avoid oxygen absorption; the other is at a height of 1/3 from the bottom of the tank.

(2) The inner wall of the tank should be smooth and clean, and the edges should be flat without edges and corners. Do not install any objects in the tank, such as cooling pipes, iron escalators, manhole doors protruding inward, etc., because these things will cause local turbulence or eddy current , affecting the separation effect. The upper part of the tank is provided with a water spray ring pipe for washing.

(3) The ratio of the wort level height of the whirlpool settling tank to the diameter of the tank (height-to-diameter ratio) is generally 1: (2~3), and the modern whirlpool settling tank usually chooses a ratio of 1:3. Relationship between aspect ratio (H/D) and wort volume/wort flow rate (V/V1). It can be seen from the figure that if the wort inlet flow rate is constant, the larger the height-to-diameter ratio (H/D), the lower the V/V1, that is, the more wort volume in the gyratory settling tank. When H/D=1, the separation effect of the gyratory sedimentation tank is already very good. However, in order to make the gyratory sedimentation tank have enough area to accommodate the thermal coagulation, the common height-to-diameter ratio in actual production is 0.3~0.5.

(4) The wort outlet is always on the side of the bottom of the gyratory sedimentation tank, and there are generally two outlets, which are respectively at 1/2 of the wort height and 1/10 of the bottom. The discharge sequence is from top to bottom. Pay attention to the flow of wort when opening the valve, so as to prevent the flow from being too fast to impact the sediment and cause the wort to be turbid.

(5) The residual wort outlet is opened at the bottom of the whirlpool sedimentation tank. The opening radius R is determined according to the height-to-diameter ratio (H/D) and the amount of thermal solidification, and it needs to be determined according to the actual situation during production.

(6) After the wort is discharged, use clean water to remove the sediment. If a small cone is made in the center of the bottom of the tank, it should be able to store all the sediment for easy discharge; if the bottom of the tank is flat, there should be 2% slope for easy cleaning. Therefore, the structural forms of the bottom of the gyratory sedimentation tank can be varied. In addition, there is a high-pressure rotary nozzle at the center of the bottom of the new whirling sedimentation tank, which can quickly break up the agglomerated hop grains and discharge them out of the tank.

The wort in the hop grains can be recovered by a filter press or a centrifuge, but it is troublesome. It may be considered to put the hop grains directly into the lauter tank. It is best to put them into the lauter tank during the last washing of the grains. If you put them in too early, the fine particles in the sediment will block the filter holes and make it difficult to filter the wort.

(7) A flat windshield should be installed at the outlet of the air duct of the groove. Open when feeding, exhaust outward, and close in time after feeding to prevent wort oxidation. Open it when the wort flows out to avoid negative pressure.

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