Tall tanks

Liquid is sometimes transferred from one tank to another b gravity. Overfilling has occurred when liquid flowed from a tall tank to a shorter one. On one occasion, an overflow occurred when liquid was transferred from one tank to another of the same height several hundred meters away. The operators did not realize that a slight slope in the ground was sufficient to cause the lower tank to overflow. 

The installation of mixers on long shafts in tall tanks may become a problem if whip of the shaft develops. To reduce this possibility, a bearing support in the bottom of the tank will hold the shaft steady. Lubrication is by the tank fluid. Therefore this has limited application if abrasive particles are present. Normally the manufacturers designs avoid this extra bearing. Sometimes a guide bearing is installed about midway in the tanks to steady the shaft at this point. Again it is preferable to avoid this, if possible, and the manufacturer should make recommendations for the installation. 

Pachuca tank The simplest and most inexpensive device for agitating the pulp. Agitation is achieved by the injection of air under pressure into the bottom of a tall tank. The rising gas draws the surrounding liquid with it to the surface... 

Table 19.5 is used to estimate foundation volumes for tall tanks and towers. They have been derived from published information (Bauman, HC, Fundamentals of Cost Engineering in the Chemical Industry, Reinhold Publishing Co., 1964) and corrected for 125 mph winds. 

Step 2. The chlorine that will eventually be fed to the absorber is stored in a tank as a liquid under pressure at 22°C. Liquid is pumped from this tank through a chlorine flow control valve to a chlorine vaporizer, a tall tank about half of which is filled with chlorine liquid and the other half with chlorine vtipor. The liquid and vapor are in equilibrium at 5°C. Saturated steam at 2 bar absolute is fed through a steam flow control valve into a coil submerged in the liquid that is in the vaporizer, and the heat transferred through the coil wall vaporizes chlorine. Chlorine vapor flows from the top of the vaporizer. 

A 3.658-m (12 ft) diameter by 4.572-m (15 ft) tall tank is to be mixed using a 0.3785-mVmin (100 gpm) pump. The liquid level in the vessel is constant at 3.658m (12 ft), and fluids have equal densities. Determine the mixing time for 95% homogeneity. 

The atmospheric leach circuit for Concentrate 1 is estimated to consist of five 5.6 m diameter by 7.7 m tall tanks, equipped with 75 kW motors. A 60 t/d oxygen plant is included. The overall installed capital cost for this circuit is estimated at 7.07 million. 

Sjde the outer tanks to isolate them neutronically from external effects. Neutron leakage from these 0.6-m-tall tanks was enhanced by placing styrofoam spacers between the tanks and the Cd-Sheathed moderator blocks. Y... 

Figure 4 Tall tank on water-saturated transversely isotropic ground.

A tall tank bonded to a water-saturated transversely isotropic ground is examined to illustrate the results of this method of analysis. The tank has a height to radius ratio of 3 1. The ratios of Young s modulus Ey/Ffc and the permeability Kg/iCh of the ground are 1.5 1 and 0.01 1, respectively. The mesh and material properties are as shown in Figure 4. The input motion is the El Centro earthquake ground motion (Figure 4 inset). 

In broad tanks (i.e., tanks with large values of H/R ratio), the sloshing pressures may be significant near the bottom, while in slender (tall) tanks, the sloshing effect is limited to the vicinity of liquid surface. 

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