Ship engine waste heat power generation comprehensive utilization method

Abstract

The invention discloses a ship engine waste heat power generation comprehensive utilization method. The ship engine waste heat power generation comprehensive utilization method comprises the following steps: (1) a flue gas evaporator is arranged on a flue gas exhausting channel of a ship heat-conduction oil furnace, and high-temperature flue gas passes through a shell pass of the flue gas evaporator; a power generation medium of a waste heat power generation system passes through the shell pass of the flue gas evaporator, and the power generation medium is subjected to heat exchange and heat suction with the high-temperature flue gas; meanwhile, cylinder sleeve cooling circulating water of a ship engine set enters a shell pass of a pipe shell type evaporator and is subjected to heat exchange with the power generation medium entering the shell pass of the pipe shell type evaporator of the waste heat power generation system; (2) after the power generation medium is evaporated, the power generation medium is changed into high-temperature and high-pressure steam and is conveyed into an expansion machine, and the expansion machine is propelled to output mechanical power so as to drive a three-phase asynchronous motor to generate power; (3) then the power generation medium enters an underwater condenser outside a board; (4) the condensed power generation medium passes through a fully-closed underwater medium pressurizer to be divided into two paths, namely one path is returned back to the flue gas evaporator, and the other path is returned back to the pipe shell type evaporator. With the adoption of the method, the purification efficiency of a power generation system is improved.

Description

technical field [0001] The invention relates to a method for comprehensive utilization of waste heat, in particular to a method for comprehensive utilization of power generation with waste heat of a marine power machine. Background technique [0002] At present, the production technology of various ship power machines in our country is mature and widely used. The main types of marine power engines are basically fuel-powered engines. At present, the function mode of the marine power engine is mainly to provide ship power, electricity and heat. The conversion and utilization rate of fuel heat is generally less than 40%, and the remaining heat is basically discharged outside except for production heating and domestic hot water. like figure 1 As shown, there are two main forms of ship waste heat: exhaust heat of marine power engine and heat discharge of cylinder liner cooling circulating water. The temperature of exhaust gas of marine power engine is about 350-400 ℃. At the s...

AI Technical Summary

Problems solved by technology

For the cylinder liner cooling circulating water of the power machine, the temperature of the cooling water entering the cylinder liner of the power unit is 55°C, and the discharge temperature is 85°C. Discharged to the surrounding water body, resulting in a waste of energy, on the other hand caused environmental pollution

Images