Marine fuel oil preheating system and its preheating method based on casing form

Abstract

The invention relates to a ship fuel oil preheating system and method based on a sleeve form, and belongs to the technical field of ship fuel oil preheating. The ship fuel oil preheating system based on the sleeve form is characterized in that a fuel preheating pipeline and a conveying pipeline are arranged between a storage bin and a sedimentation cabinet, a preheating pump is arranged on one path and provides high-temperature fuel oil for the storage bin, a conveying pump is arranged on the other path, and conveys the heated heavy oil to the sedimentation cabinet, the two branch paths are provided with stop check valves in the corresponding directions, and the directions of the pipelines are prevented from being mismatched. The diameter of the fuel oil preheating pipeline is smaller than that of the fuel oil conveying pipeline, a fuel oil preheating pipeline segment B located in the storage bin is located in a corresponding fuel oil conveying pipeline segment A, and the pipeline segment A and the pipeline segment B are provided with regulating valves respectively. The flow of the pipeline segment A is larger than that of the pipeline segment B. A communication pipe C with a stop valve is arranged between the pipeline segment A and the pipeline segment B.

Description

technical field [0001] The invention relates to a ship fuel oil preheating system and a preheating method based on a casing, and belongs to the technical field of ship fuel oil preheating. Background technique [0002] In the ship's fuel oil delivery system, it is necessary to transport the fuel oil from the storage tank to the settling tank. The fuel oil in the storage tank is generally heavy fuel oil, and its viscosity varies greatly with temperature. The higher the temperature, the lower the viscosity. For example, the viscosity of a certain type of heavy fuel oil is 380cSt at 50°C, and close to 20000cSt at 0°C. The high viscosity will lead to a large resistance when the transfer pump pumps fuel, which will increase power consumption and even make it impossible to pump. Therefore, it is necessary to pre-heat the fuel to a certain temperature to reduce the viscosity before pumping. At present, the traditional heating method for heavy oil on ships is to arrange heating coi...

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Problems solved by technology

[0009] The technical problems to be solved in the present invention are: the existing scheme of using small compartments for fuel oil preheating in ships, the fuel oil preheating is uneven; the effect of heat exchange is not good, and it is difficult to control the oil temperature; Stable, life is affected; delivery pump and preheat pump need to be turned on alternately according to the set program, and the work efficiency of hot oil delivery is low

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