hotline
86 512-81666096图124，20000m ³ calculation sheet for fire sprinkler water of lng full capacity tank - doer equipment
classification：forum publishtime：2019-11-20 14:13:06
20000m ³ calculation sheet for fire sprinkler water of lng full capacity tank
1. 20000m ³ standard specifications and basis adopted in the design of fire sprinkler water calculation sheet of lng full capacity tank
1) code for fire protection design of buildings (gb50016-2014)
2) code for fire protection design of petrochemical enterprises (gb50160-2008)
3) code for design of water spray fire extinguishing system (gb50219-2014)
4) code for fire protection design of petroleum and natural gas engineering (gb50183-2004)
2 design scope
protect and cool the lng storage tank.
design and calculation of 3 water spray system
3.1 calculation of wall surface area of lng storage tank
diameter of outer cylinder of lng storage tank ø = 36m, height h = 26.5m
surface area of lng tank wall s1 = π · d × h =π × thirty-six × 26.5m2 = 2997 m2
the top cover of lng storage tank is spherical, with radius r = 30.6m and height h = 5.85m
surface area of lng tank top cover s2 = 2 π · r × h =2π × thirty point six × 5.85m2 =1125 m2
3.2 calculation of spray water volume of lng storage tank
spray water spray intensity of 3.2. 1 lng storage tank
according to the specification:
water spray intensity for lng tank wall design: q1 = 2.5 l/min. m2 (coefficient derived from gb50219-2014)
water spray intensity for lng tank roof design: q2 = 4 l/min. m2 (coefficient derived from gb50219-2014)
minimum working pressure of water mist nozzle: 0.2mpa
duration: 6 h
3.2.2 calculation of spray water volume of lng storage tank
calculated water volume of lng storage tank wall: q1 = s1 × q1=7500 l/min
calculated water volume on the top of lng storage tank: q2 = s2 × q2 = 4500 l/min
total spraying water volume: q = q1 q2 = 12000 l / min
3.3 calculation of nozzle quantity of lng storage tank
3.3.1 flow of single water mist nozzle
q=k·（10p）1/2
q ---- flow of each water mist nozzle, l / min
k ---- flow coefficient of water mist nozzle
p -- working pressure at the most unfavorable point of water mist nozzle, mpa
the type of sprinkler used in the tank wall is zstmb-40-120, spray angle of spray nozzle.
=120
flow coefficient: k = 40; p takes the minimum value: p = 0.2mpa
q=k·（10p）1/2=56.6 l/min
the type of sprinkler used in the roof of this project is zstwc-28-120, spray angle of spray nozzle.
=120
flow coefficient: k = 28; p takes the minimum value: p = 0.2mpa
q=k·（10p）1/2=39.6 l/min
3.3.2 calculation of nozzle quantity
1. number of nozzles calculated by water volume:
number of tank wall nozzles: n1 = q1 / q = 7500 / 56.6 = 132.5
number of nozzles on tank top: n2 = q2 / q = 4500 / 39.6 = 113.6
to sum up: the number of top nozzles: 114, the number of tank wall nozzles: 134, a total of 248.
prev： 123，20000m ³ dry powder calculation of lng full capacity tank (part 2) - doer equipment
next： 162，what are the storage methods of lng cryogenic storage tanks（ 1) -doer equipment
news
- 205、lng operating procedures - doer equipment [2022-11-15]
- 205. tank classification and characteristics - doer… [2022-11-15]
- 204. brief introduction to tank development - doer … [2022-10-31]
- 204、lng vacuum cryogenic liquid storage tank - doe… [2022-10-31]
- 203、precautions for precooling of natural gas stor… [2022-10-28]
- 203、preparation before pressure regulation of lng … [2022-10-24]
- 3，successful test run of cangzhou ethylene storage… [2019-09-02]
- 2，advantages of suzhou doer large cryogenic tank … [2019-08-30]
- 1，congratulations on the success of one-time liqui… [2019-08-26]
