Drums nozzle locations

Exhibit 5-14 depicts the preferred nozzle locations for horizontal drums. 

ETOilBlT 5-14 Preferred Nozzle Locations for a Horizontal Drum... 

To facilitate specific elevation requirements for level instruments or positioning a maintenance access, nozzles may be located off the main axis. These nozzles are generally referred to as hillside nozzles. A typical hillside nozzle is shown in Exhibit 5-15- Tall vertical drum nozzles should be elevated and oriented using the tower subjea as a guide. It should be noted, however, that nozzle locations are not restricted by internal components, as is die case for the distillation tower. More information on vertical drums is available in Chapter 10, Towers. 

Pipirtg at drums should be arranged in conjunction with nozzle locations, platform arrangements, and the... 

Determine the liquid heights of the light and settling liquids, and arrive at the drum diameter and overall height via a compromise with vapor-phase separation requirements. Adjust the design for such considerations as economic L/D4 ratio and location of inlet nozzle. 

Position of sulfur nozzles. For best results, the spray nozzle header is located parallel to the axis of the sulfur-coating drum. The nozzles in the header are 8 in. apart on centerline. The header is located so each nozzle is spraying vertically down 4% in. onto the fastest moving section of the rolling bed. If the nozzles are placed farther away, the sulfur dust loading in the drum is increased and the quality of the product is decreased. Increasing the spray distance beyond about 8 in. from the bed is both impractical and hazardous as sulfur explosions may occur if... 

The reactor is a channel-tank type unit in which a core, a side reflector with rotating control drums and internal protection are located. A nozzle chamber is located below the reactor. 

The radius of the vessel is r, ho is the height of the 0 % level indication (measured from the base of the vessel) and hioo is the height of the 100 % level indication. Care should be taken in quantifying these values. They will usually not correspond to the location of the nozzles to which the level gauge is connected. The difference (hioo — ho) is the instrument range, usually found on the instrument datasheet. While a value for ho is not required for vertical drums, it is required for other shapes. 

The suction drums for compressors 1 and 2 are located along the equipment line just to the west of the operating platform. Often, the outlet line of the suction drum to the compressor suction nozzle requires a flow meter with straight run lengths upstream and downstream. This arrangement permits the natural configuration of the line to satisfy the meter flow requirements. 

When specified, steam drums and deaerators are usually furnished as a proprietary item. Layout is limited to confirmation of nozzle and support locations to suit piping and structural configurations and platforming for operator and maintenance access. Exhibit 5-3 illustrates a typical deaerator arrangement. 

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