crude oil tank cleaning system (COW)
the international crude oil tank cleaning system (COW) was developed 2 years ago. This technology is an internationally developed onshore oil storage tank cleaning system, and has obtained relevant patents. It has been widely used in cleaning oil storage tanks in Southeast Asia, Europe, Middle and Far East and Southeast Asia. So far, more than 8 oil storage tanks have been successfully cleaned by this technology. After nearly twenty years' development and improvement, COW crude oil cleaning system is at the leading level in the world in the cleaning application of onshore oil storage tanks.
the main advantages of mechanical cleaning system of p>COW crude oil storage tank are:
high crude oil recovery rate.
COW method can recover the oil in the sediments to the maximum extent, and the recovery rate accounts for more than 98% of the total sediments, leaving only less than 2% of impurities such as rust and mud sand, which are basically oil-free, while manual tank cleaning is to manually clean all sediments as residual oil, which causes pollution and waste. Taking the cleaning of a 1, cubic meter oil tank in Qinhuangdao Oil Transmission Company as an example, if the traditional manual cleaning tank needs to treat about 1,6 tons of sediment, while the mechanical cleaning with COW equipment needs to treat only about 1 ton of residue (rust, sand, sundries, etc.) in the dead corner manually.
the cleaning cycle is short, and the stopping time is short.
COW technology mainly uses mechanical cleaning, which is not affected by the amount of sediment in the storage tank, the size of the oil tank and the weather, so it has high efficiency and short construction period, while manual cleaning is greatly affected by the above aspects. With the increase of sludge, the cleaning time also increases greatly. Take the 1,-square-meter oil tank as an example. Under normal circumstances, the COW method is used to clean the tank, and the tank stop time is only 15 days, while the manual method takes about two months.
not directly heating with steam or hot water will not affect the quality of crude oil.
the traditional manual tank cleaning method is to "steam the tank" with a large amount of steam, so that the condensate oil directly contacts with the steam, which melts the condensate oil and causes the loss of light components, thus destroying the quality of crude oil. COW method relies on cleaning oil to impact deposits. Due to dilution, dissolution and diffusion, the recovered crude oil will not form deposits in a short time. In the recovered crude oil, the water content is not increased, the wax content is reduced, and there is no sand or sundries.
with less manpower input, safety is guaranteed.
COW process uses inert gas to control the concentration of oxygen and combustible gas in the tank, which avoids the potential hidden danger caused by static electricity generated by high-speed injection from the nozzle. After cleaning, the inspection and maintenance personnel can enter the tank for hot work maintenance. However, manual tank cleaning requires a large number of people to remove sediments in tanks with high concentration of oil and gas, which is easy to cause casualties. There are many vehicles pulling residual oil in and out of the oil depot, which increases the unsafe factors and causes pollution and hidden dangers to the environment in the reservoir area.
no environmental pollution.
COW process method does not discharge dirty oil, which is to separate the dirty oil through an oil-water separation tank, recycle water as a cleaning medium, and recover the separated oil. In the traditional method, crude oil is heated, which causes a large amount of oil and gas to volatilize, and the sludge that is not bought by anyone is piled up and abandoned, which causes environmental pollution.
the cleaning effect is good.
COW process uses crude oil as cleaning medium, because crude oil is rich in light components, which is equivalent to a solvent cleaning. Under certain conditions of temperature, pressure and flow rate, COW process can ensure that the metal background is exposed on the inner surface of the oil tank except the dead angle.
the comprehensive economic benefit is obvious.
The fully automatic mechanical cleaning machine for large oil tanks is developed by our company based on many years' cleaning experience of large oil tanks. This set of equipment includes three systems: mechanical cleaning system, safety guarantee system and logistics maintenance system.
1. The mechanical cleaning system is the main and core equipment for oil tank cleaning, including: vacuum suction pump set, heat exchange cleaning pump set, three-dimensional jet set and pipeline valve set, etc.
2. The safety guarantee system is to ensure that the cleaning process is produced in a safe environment, which includes: inert gas generator, compressed air unit, combustible gas oxygen detector, toxic gas detector, etc.
3. The logistics maintenance system is the replenishment and maintenance function to ensure the normal operation of the whole system equipment, including: generator set, steam generator, explosion-proof command room, explosion-proof communication, explosion-proof lighting and explosion-proof tools, etc.
advantages: high degree of automation, mass production and various styles, which can meet the requirements of different oil tanks.
Cow (Cruse oil washer) system is a device specially developed for cleaning large floating roof oil tanks based on our cleaning experience for many years. This device recovers oil from cleaning oil tanks, adopts suction system, and realizes the assembly of the main machines used for cleaning, which not only reduces the temporary installation work, ．COW system is composed of suction system, heat exchange system and multiple groups of cleaning machines. Compared with the same equipment abroad, it adopts full explosion-proof parts, optimizes the selection of unit equipment, and has the advantages of small overall equipment volume, convenient transportation and good cost performance.