The hottest sewer fire prevention facilities water
2022-10-23- Detail
Sewer fire prevention facilities - water sealed well
when the production wastewater can produce gas that can cause explosion or fire, the water sealed well must be set in the pipeline system transporting the wastewater. In addition to blocking the flow of flammable and explosive gases, the function of water sealed wells also blocks the swimming fire on the water surface, so as to prevent the spread of fire or explosion. In practical work, especially in the design of water drainage in chemical enterprises, we should reasonably set up water seal wells according to the physical and chemical properties of production wastewater, and do a good job in the fire and explosion prevention design of water drainage pipes from the source; As the construction unit and construction unit, the construction shall be carried out in strict accordance with the requirements of the design drawings of the sewer pipe to ensure that the water sealed well plays its due role in the actual production
I. places and facilities requiring water sealed wells
1. Water sealed wells should be set at the outlet of production devices, units, buildings, structures, tank groups, pipe trenches and cable trenches
2. Water sealed wells should be set at the outlet of cofferdam sewer in the furnace, tower, pump, cooling equipment and other areas of production units
3. Industrial sewers in flammable and combustible liquid tank groups (including experimental wells under various test conditions that can be easily and accurately measured by electronic rainwater) should be set with water sealed wells at the places where they pass through the fire dike
4. Water sealed wells shall be set between the unit area, irrigation area and auxiliary production area for the main and branch pipes of the whole plant
II. Structure of standard water sealed well
the depth of water seal of water sealed well should be 0.25 meters, ventilation facilities should be set on the well (the diameter of ventilation pipe should not be less than 100mm), and mud nests should be set at the bottom of the well
1. For new projects, if the process requires the setting of water sealed wells, they should be designed and constructed according to the structure of standard water sealed wells. At this time, it should be noted that the water seal well should not be set in the roadway and the area with many pedestrians, and should be properly away from the place where open fire occurs. At the same time, the water sealed well should be set at the outlet where the sewage is generated and at appropriate intervals on the main pipe
2. For engineering projects that have been completed and put into production (water sealed wells are not considered in the design), if the production wastewater contains flammable and explosive substances at this time, the safety pin should be reconstructed on the basis of the original drainage inspection well to make it have the effect of water sealing. Several simple and practical transformation schemes are introduced below
before transformation:
transformation scheme I:
connect an upturned elbow at the inlet pipe of the original inspection well; Install a vent pipe with a diameter of no less than 100mm on the cover plate of the inspection shaft. With a total construction area of 37200 square meters,
transformation scheme II:
connect a turn over elbow at the inlet pipe of the original inspection well; Install a vent pipe with a diameter of no less than 100mm on the cover plate of the inspection shaft
transformation scheme III:
build a partition with cement in the original inspection well to make it more than 0.25 meters higher than the edge source on the water inlet pipe; Install a vent pipe with a diameter of no less than 100mm on the cover plate of the inspection shaft
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