In the rumbling production workshops of oil refineries, from the transportation of 480℃ oil and gas in catalytic cracking units to the transfer of 380℃ residual oil in vacuum distillation systems, there is always a set of equipment operating continuously under high-temperature conditions — it is the high-temperature centrifugal pump for oil refineries. As the core transportation hub for high-temperature media in the refining and chemical process, it connects the key links of "heating - reaction - separation". This article will start from the core characteristics of high-temperature centrifugal pumps in oil refineries, compare their essential differences with ordinary pumps, sort out the key dimensions of scientific selection, and further deeply analyze why the Teffiko API610 high-temperature centrifugal pump can become the preferred choice in oil transportation scenarios and the irreplaceable professional advantages behind it.
High-temperature centrifugal pumps for oil refineries are centrifugal pump equipment specially designed for high-temperature working conditions in oil refineries. They are mainly used to transport high-temperature media such as crude oil, residual oil, and oil-gas with temperatures ranging from 200℃ to 500℃. In core units of oil refineries such as catalytic cracking, vacuum distillation, and hydrocracking, high-temperature centrifugal pumps undertake important tasks of medium circulation, transportation, and pressurization. Functionally, these pumps not only need to achieve efficient transportation of high-temperature media but also meet the requirements of long-term continuous operation. Under the continuous production mode of oil refineries, high-temperature centrifugal pumps need to continuously transport high-temperature media for more than 8,000 hours. Therefore, the reliability and fatigue resistance of the equipment have been specially enhanced to ensure that stable flow and head output can still be maintained under the long-term action of high-temperature media.
Many people mistakenly believe that "high-temperature centrifugal pumps are only more temperature-resistant than ordinary pumps", but in fact, there are essential differences in the design logic between the two. The core dividing point lies in the adaptability to high-temperature media.
| Characteristic Dimension | Ordinary Centrifugal Pumps | High-Temperature Centrifugal Pumps for Oil Refineries | Interpretation of Core Differences |
|---|---|---|---|
| Structural Design | Relatively simple structure | Centerline-supported structure | Ensure that the centerlines of the pump inlet and outlet remain aligned during thermal expansion of the pump body, avoiding stress concentration and seal damage. |
| Cooling System | Simple cooling or no cooling required | Complex external cooling system | Provide forced cooling for bearings, seal chambers, etc., to ensure that key components work within a safe temperature range. |
| Sealing System | Ordinary mechanical seals | High-grade double mechanical seals | Equipped with complex pipeline systems such as seal oil and flushing to ensure absolute reliability of the seal and prevent leakage. |
| Material Selection | Cast iron, ordinary carbon steel | High-temperature alloy steel, duplex stainless steel | Possess excellent properties such as necessary high-temperature strength, thermal fatigue resistance, corrosion resistance, and erosion resistance. |
The selection of high-temperature centrifugal pumps for oil refineries is essentially "to accurately match equipment parameters with the characteristics of high-temperature media and working condition requirements". The following core dimensions related to high-temperature media should be focused on:
First, clarify the key parameters of the high-temperature medium. Detailed records should be made of the maximum temperature and normal operating temperature range of the high-temperature medium (e.g., "maximum 480℃, normal 380-420℃"), which directly determines the selection of pump body materials. If the temperature of the high-temperature medium exceeds 400℃ for a long time, nickel-based alloy materials should be selected; if the temperature is between 200℃ and 350℃, a combination of 316L stainless steel and ceramic coating can be chosen. At the same time, the corrosiveness (such as sulfur content, pH value), solid content, and viscosity change curve of the high-temperature medium should be confirmed. For example, when transporting high-temperature media with a solid content > 30ppm, a non-clogging impeller should be selected; when transporting high-viscosity high-temperature media, the inlet diameter of the impeller should be increased to reduce the flow resistance of the medium.
Second, evaluate the transportation requirements of the high-temperature medium. Based on the transportation flow and head of the high-temperature medium, combined with the influence of temperature on the density and viscosity of the medium, correct the pump selection parameters. The density of the high-temperature medium decreases at high temperatures, which will cause the actual head of the pump to be slightly lower than that under normal temperature conditions. Therefore, a 10%-15% head margin should be reserved during selection. In addition, if the high-temperature medium needs to be transported with frequent starts and stops, a pump body structure with thermal shock resistance should be selected to avoid cracking of the pump body due to sudden cooling and heating of the high-temperature medium.
Finally, pay attention to the safe transportation requirements of the high-temperature medium. If the high-temperature medium is flammable and explosive (such as high-temperature oil and gas), a motor with an explosion-proof grade of Ex d IIB T4 or above should be selected, and the sealing system should pass the API 682 certification to ensure no leakage of the high-temperature medium; if the high-temperature medium is toxic, a leakage detection device should be equipped to monitor the leakage of the high-temperature medium in real-time and ensure production safety.
Among many pump manufacturers, how does TEFFIKO stand out? The answer lies in our ultimate focus and depth.
For decades, TEFFIKO has been deeply engaged in the field of oil transportation and refining. We have a deep understanding of the fluid characteristics, coking trends of high-temperature media, and the special requirements for equipment. Therefore, each pump we provide is "custom-made" based on specific process conditions.
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