Arrangement problem of acidic water tanks
Thread Content
Hello everyone, I have a question I’d like to ask. Should the acidic water tanks be arranged as process equipment or as storage tanks? If they are treated as storage tanks, the total volume of the acidic water tank area will exceed 5000 m3, resulting in a very large fire separation distance between the tank area and the process units. Also, is it necessary to install a fire dike for the acidic water tank? I wonder what everyone thinks about this, or how the various refineries arrange things?
We are arranged according to the storage tanks; there are fire dikes as well
According to the specifications, if the total tank capacity is >5000 m3, the safety distance between the tank area and the acid water stripping unit should be 40 meters – is that the correct approach?
As can be seen from Table 5.2.1 of the petrochemical regulations, \"sewers containing flammable liquids, oil separators, acidic water tanks, and tanks holding oily wastewater\" as well as \"process equipment using flammable liquids of types A-B and B-A with operating temperatures below their flash points\" have the same fire separation requirements as other equipment and buildings; therefore, acidic water containing flammable liquids can be classified as flammable liquids of types A-B and B-A. 1. When the total tank capacity is > 5000 m3, it is recommended to treat it as a tank farm, and the fire protection distance should be determined in accordance with the provisions for \"Fixed-roof above-ground flammable liquid storage tanks of Class A B and Class C\" in Table 4.2.1; a fire dike should also be installed. 2. When 1000 m3 < total tank capacity < 5000 m3, it is recommended to arrange the tanks in groups at the edge of the facility; the fire protection distance should be determined according to the provisions in Table 5.2.1 for “Flammable liquid storage tank groups of Category A B and Category B A (total tank capacity > 1000–5000 m3)”. A fire dike should be installed. 3. When the total tank capacity is < 1000 m3, it is recommended to place the tanks within the facility; the fire protection distance should be determined according to the provisions in Table 5.2.1 for “Flammable liquid storage tank groups of Category A B and Category B A (total tank capacity < 1000 m3)” or for “Sewage tanks containing flammable liquids, oil separation tanks, acidic water tanks, and oily wastewater tanks”. No fire dike is required; instead, a retaining wall should be installed.
What the distance should be is specified by standards; I remember that if there are fire dikes, the distance can be reduced