Slop

Another hmit plays a role when the cake at the feed zone has not reached a consistency to be conveyed, in which case it slops over on the preceding cake in the basket. This is especially true for cake which has a low filtration rate. The stroke frequency has to be reduced accordingly. 

The influence of factor series to electrode characteristics has been established. Dependency of the potential of ISE from concentration of defined substance is linear in interval of concentration l lO - l lO mol/1 at the pH 2,0-6,5. Slopping of the graduated graph form 55-56 mV/pC for single-chai ge cation. Potentiometric factors of the selectivity K,, ISE for alkaloids of Papaver Somnifemm has been determined. 

Time-delay slopping or operating relay ("84 Operating mechanism... 

This chapter covers the design of facilities to handle equipment drainage and contaminated aqueous effluents that are sent for appropriate disposal blowdown drum systems to receive closed safety valve discharges, emergency vapor blowdowns, etc. and facilities for process stream diversion and slop storage. Also covered are criteria for selecting the appropriate method of disposal. Design of flares is covered in a subsequent chapter. 

Provide settling facilities to separate hydrocarbon liquid from the flare seal water effluent, and appropriate means of disposal, e.g., to slop storage. 

The first vessel in the blowdown system is therefore an acid-hydrocarbon separator. This drum is provided with a pump to transfer disengaged acid to the spent acid tank. Disengaged liquid hydrocarbon is preferably pumped back to the process, or to slop storage or a regular non-condensible lowdown drum. The vented vapor stream from the acid-hydrocarbon separator is bubbled through a layer of caustic soda solution in a neutralizing drum and is then routed to the flare header. To avoid corrosion in the special acid blowdown system, no releases which may contain water or alkaline solutions are routed into it. 

Four skimming connections with trycocks are normally provided at the outlet end of the drum, at the normal liquid level, and at 150 mm, 450 mm, and 500 mm below the normal level. Liquid hydrocarbon skimmed from these connections can be pumped to a suitable slop system. A coimection to the suction of a blowdown drum pumpout pump, if available, is adequate for this purpose. 

Plant designs must include means of safe disposal for various slop materials, such as the following ... 

The following means of disposal may be considered for disposal of slop materials such as the above ... 

Slop storage - Slop storage facilities are of three basic types according to the materials handled ... 

Materials accumulated in slop storage are normally routed to rerunning facilities or blended into appropriate tankage for disposal. 

If pressure slop storage is required to handle slop materials in the light ends range, it must comply with the following ... 

As an alternative to special pressure slop storage, the necessary holdup may be provided in a non-condensible blowdown drum. 

Light and heavy atmospheric slop storage are normally both necessary in the average refineiy. Sizing depends on the refinery complexity, volume and number of finished and intermediate products, and available means of disposal or reruiming. 

Slop bringing the explosives truck through process and administrative areas... 

The fire was more serious than it would normally have been because the inventory in the plant, about 70 tons, was about twice the usual amount. Some of the overheads from a reactor were collected in a slops drum and recycled. The inventory in the drum was usually small. At about 9 a.m. on the day of the fire, the recycle pump failed. As a result, the level in the drum rose, and the level in the reactor fell. The operator noticed the fall in the reactor level (but not the rise in the drum level) and recycled product to maintain the level. At 8 p.m. the supervisor noticed that the high-level alarm on the slops drum was lit he found that the recycle pump had failed, and he changed over to the spare it leaked 25 minutes later. Section 3.3.1 describes another occasion when operators failed to notice unusual readings for 11 hours. 

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