Ship fuel preheating system and preheating method

Abstract

The invention relates to a ship fuel preheating system. The ship fuel preheating system is characterized in that a fuel preheating branch pipeline and a fuel conveying branch pipeline are arranged between a storage bin and a sedimentation cabinet. A main pipeline is shared and is divided into two branches near the sedimentation cabinet, a preheating pump is arranged on one branch and provides high temperature fuel for the storage bin, a transfer pump is arranged on the other branch and conveys heated heavy oil to the sedimentation cabinet, and the two branches are provided with stop check valves in the corresponding directions so as to avoid pipeline direction malposition. A small compartment is arranged at one corner of the storage bin, and a first partition plate is arranged in the middle of the small compartment and divides the compartment into two parts in the X direction. A pipe A and a pipe B are arranged in a first sub-compartment, the upper right corner of the first partition plate is provided with a hole, the lower left corner of a second partition plate is provided with a hole, and the two holes are in opposite angle arrangement. Small holes are formed at the bottoms of partition plates to be used for sweeping. An upper plate of the compartment is provided with a plurality of air holes, so as to guarantee timely overflow of generated steam. The pipe A and the pipe B are communicated with the main pipeline and provided with regulating valves respectively.

Description

technical field [0001] The invention relates to a ship fuel oil preheating system and a preheating method, belonging 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. [0003] At present, the traditional heating method for heavy oil on ships is to arrange heating coils in the f...

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Problems solved by technology

[0007] The technical problem to be solved in the present invention is: the compartment design of the fuel oil conversion device in the existing fuel oil preheating system of the ship leads to uneven distribution of fuel oil temperature in the compartment, accumulation of hot oil above the compartment, and poor heat exchange between hot and cold oil. Sufficient, low oil temperature near the suction port, etc., when the operating condition deteriorates, it may even increase the operating cost, and even the economy is inferior to coil heating

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