Control method and control system for obtaining high-temperature fuel in ship fuel preheating system

A medium-high temperature, fuel oil technology, applied in the direction of charging system, fuel heat treatment device, combustion air/combustion-air treatment, etc., can solve the problems of reducing pump service life, increasing system cost, grid impact, etc., and achieve service life extension , Reduce product cost, constant flow effect

Inactive Publication Date: 2016-06-01
SHANGHAI MERCHANT SHIP DESIGN & RES INST
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AI Technical Summary

Problems solved by technology

The price of variable frequency pumps is much higher than that of conventional pumps, and long-term variable load operation will reduce the service life of the pumps, which will increase the cost of the system; at the same time, the power change of variable frequency pumps will also have a certain impact on the power grid on board

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  • Control method and control system for obtaining high-temperature fuel in ship fuel preheating system
  • Control method and control system for obtaining high-temperature fuel in ship fuel preheating system

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0024] see figure 2 , a control method for obtaining high-temperature fuel oil in the fuel oil preheating system of a ship. The fixed-frequency preheat pump sucks high-temperature fuel oil from the settling tank and enters the steam heater; the high-temperature fuel heated by the steam heater enters the heat exchange box of the fuel oil storage tank, Heat the cold oil to obtain relatively high-temperature fuel; the relatively high-temperature fuel is pumped out into the settling tank through the fuel delivery pump; there is a temperature sampling point b at the inlet of the fuel delivery pump, if the temperature at point b is higher than the set value, adjust the steam valve so that Reduce the amount of steam, on the contrary, adjust the steam valve to increase the amount of steam, and finally keep the fuel temperature at the inlet of the fuel...

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Abstract

The invention relates to a control method and a control system for obtaining high-temperature fuel in a ship fuel preheating system and belongs to the technical field of the ship fuel preheating system. The control method for obtaining the high-temperature fuel in the ship fuel preheating system is characterized by comprising the following steps: sucking high-temperature fuel from a precipitation cabinet by using a fixed-frequency preheating pump and putting the high-temperature fuel into a steam heater; putting the high-temperature fuel heated by the steam heater into a heat exchange box of a fuel storage cabin; heating cold fuel to obtain relatively-high-temperature fuel; pumping out the relatively-high-temperature fuel by using a fuel transfer pump and sending into the precipitation cabinet; regulating a steam value to reduce the steam amount if the temperature of a temperature sampling point b positioned at the inlet of the fuel transfer pump is higher than a set value; otherwise regulating the steam valve to increase the steam amount; finally maintaining the temperature of the fuel at the inlet of the fuel transfer pump to be at a constant value.

Description

technical field [0001] The invention relates to a control method and system for obtaining high-temperature fuel oil in a ship fuel oil preheating system, and belongs to the technical field of ship fuel oil preheating systems. 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 fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M31/02
CPCF02M31/02
Inventor 王文中黄海啸黄信男
Owner SHANGHAI MERCHANT SHIP DESIGN & RES INST
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