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Product Introduction
In order to ensure the safety of ship operation and navigation, large oil tankers, FPSO(Floating Production Storage and Offloading), I .e. floating production, storage and unloading devices, oil and gas drilling platforms and chemical tankers, shall be equipped with inert gas generating and conveying devices to replace the air in cargo oil tanks and dirty oil and water tanks, so as to realize the oxygen-deficient environment of cargo tanks and achieve the purpose of fire and explosion prevention.
1 product use and scope of use
The main purpose of this product (project):
a. Reduce the content of the atmosphere in the cargo tank, so that the atmosphere in the tank cannot support combustion, and make the empty tank inert.
B, during the voyage, the atmospheric oxygen content (by volume) in the cargo oil tank shall not exceed 8%, and keep the positive pressure state, except when the oil and gas in the cargo oil tank need to be discharged.
C, except that it is necessary to drain the oil and gas in the cargo oil tank, ensure that the air does not enter the cargo oil tank during normal operation.
d. Dispel the hydrocarbon gas in the empty cargo tank so that combustible gas will not be formed in the cargo tank during the subsequent degassing process.
2 System principle
In the first washing stage of the central pipeline: the accumulation of soot particles is sufficiently removed, and the hot pipeline flue gas will also be sufficiently cooled. The flue gas is then redirected by a sloping baffle with little pressure loss and is evenly dispersed through the wet filter, thereby avoiding the formation of gas pockets.
The cooling/cleaning process is the second stage: the efficiency of the water mist from the spray tower is very high relative to the sulfurized particles, and the large area/large volume ratio spray formed by the sea water of the open spray tower ensures an efficient cooling and cleaning effect and a sufficient self-cleaning effect of the filter. The mesh mist eliminator installed on the upper part of the washing tower can fully remove water droplets. Through the design of the internal "clean" structure, the accumulation of solids and water droplets has been minimized as much as possible.
3 Performance
3.1 Design Basis
Seawater: filter out 3mm impurities, the maximum temperature of seawater is 32 ℃;
Outdoor ambient temperature: 18 ℃ to +45 ℃, 95% RH;
I.G. Room ambient temperature: 0 ℃ to +45 ℃, 95% RH;
Instrument gas: water-free, oil-free and dust-free according to DIN/ISO 8573-1;
Detection method of 3.2 gas composition
O2--- Fixed oxygen analyzer;
CO2，SO2--- Retractor tube;
Productivity and performance deviation: temperature ± 10 ℃, total amount ± 3%, pressure ± 5%;
Voltage deviation:-15%/+ 10%;
When the ship is sailing: static heeling 15.0 °, dynamic heeling 22.5 °;
Front and rear static: 5.0 °;
Front and rear dynamics: 7.5 °;
Main technical parameters of 3.3
1) Rated displacement: 7500m3/hr；
2) Water droplet carry-over amount: less than 1 g/kg dry gas;
Oxygen content: about 5% of volume;
Nitrogen: balance;
3) Gas composition after washing:
Oxygen content: about 5%;
Carbon dioxide: approximately 13%;
Sulfur dioxide: less than 100ppm;
Nitrogen: balance;
3.4 energy consumption:
1) Blower power: 86kw,440v,60Hz,3 phase;
2) Seawater consumption: 115m3/h, the seawater pressure at the inlet of the scrubber is 0.2MPa;
3) Sea water consumption of deck water seal: 3m3/h, the inlet seawater pressure of the deck water seal is 0.1MPa;
4) Control system power: 1.5kw,220v,60Hz, single phase;
5) Gas consumption of control system instrument: 4Nm3/h, regular operation;
6) Weight of washing tower: ≦ 2000kg;
7) Weight of deck water seal: ≦ 3000Kg;
8) Weight of vacuum pressure valve: ≦ 1000Kg;
Online consultation
CSSC Fenxi Heavy Industry Co., Ltd. is subordinated to China Shipbuilding Corporation Limited, which is one of FORTUNE GLOBAL 500. Fenxi is a national professional manufacturer of intelligent manufacturing, a national designated research and production enterprise of ocean going ship motors, and a backbone manufacturing enterprise of new energy equipment.
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