How to stop the oil loss in the double-layer oil tank

During the normal operation of double-layer oil tanks, the evaporation loss of oil can be said to be a relatively common type of problem. Oil loss will not only cause a waste of resources, but also cause pollution to the surrounding environment when serious, and even cause huge economic losses to the enterprise. Therefore, certain technical measures must be taken to control it.
Oil loss is perennial in daily life, but in order to better reduce costs, what we need to do is to reduce the oil loss in the double-layer oil tank. So what should we do to better prevent the loss of oil in the double-layer oil tank? The following Jianshen Company will give you a detailed introduction, hoping to help you:
 
In order to prevent the oil loss in the double-layer oil tank, when the light hole and the oil measuring hole of the pressure vessel are opened, natural ventilation will be formed and the oil and gas will be lost. When the temperature drops at night, the gas in the oil tank is shortened and the oil and gas condenses. The pressure in the double-layer oil tank will drop together. When the pressure drops to a certain value, air enters the tank and the oil and gas concentration in the negative gas space drops, creating conditions. With the continuous advancement of coating technology, high-solid, solvent-free coatings that meet environmental requirements will advance the anti-corrosion function of the coating and provide more durable and reliable protection for double-layer oil tanks.
  (1) Collect and recover oil vapor
        At present, the separation and recovery methods of oil vapor can be divided into absorption method, adsorption method, condensation method, recovery method, etc., and some also include compression process or comprehensive utilization of several methods. In some developed countries, the recovery of oil and gas using oil and gas recovery devices has reached Degree of industrialization. Generally speaking, the oil and gas inlet concentration of the oil and gas recovery device is o%-50% (volume percentage), the outlet concentration is 3% to 5% (volume percentage), the recovery rate is not less than 90% (weight percentage), and the oil and gas inlet temperature is normal It is 5～40℃.
　　
(2) Reduce the temperature of the oil in the tank and the range of change
　　 By reducing the temperature and variation range of the oil in the oil tank, the "small breath" loss of the oil can be effectively reduced. Usually use strong reflective anti-corrosion materials to paint the surface of the cylinder, spray water for cooling, install reflective heat insulation boards, and use non-metallic cylinders or earth-covered cylinders.
　　
(3) Improve the pressure capacity of oil tanks
It is very obvious to improve the pressure-bearing capacity of double-layer oil tanks and reduce oil evaporation loss. When the fuel consumption pressure is 5kPa (500mm H20), the loss is 25.1% of that of the open cylinder. When the pressure resistance reaches 26kPa( At 260mmH20), the "small breath" of gasoline is basically eliminated, and the loss of "big breath" is also greatly reduced. (4) Strengthen the maintenance of pressure vessels and strictly implement the operating procedures
　　The key point is to regularly check the sealing condition of the oil tank, especially the mechanical breathing valve and hydraulic safety valve. The manual dipstick should be used as far as possible in the early morning or evening when the pressure difference in the oil tank is small.
　　
(5) Install breathing valve baffle on oil tank
　　 The air inside the tank can be stratified with oil and gas, so that the exhaled gas is mainly oil and gas with a lower concentration in the upper layer. Relevant data show that this can reduce the evaporation loss of pressure vessel oil by 20% to 30%.
　　
(6) Strengthen process management
        Improve the operation technology to reduce the evaporative loss of oil products, such as high pressure vessel liquid level storage, reduce medium and low liquid level storage, to reduce the volume of gas space, reduce breathing loss, and reduce oil transfer; when collecting oil, try your best Increase the flow rate of the pump, so that the oil is too late to volatilize in a large amount during the oil collection process and reduce the loss. The opposite is true during the oil delivery operation, so as to avoid the breathing valve inhaling air and causing the oil to end up with reversal and exhalation loss. Collect the oil and send it when the temperature rises.