System for generating electric power by recovering waste heat of materials at top of fractionating tower

Abstract

The invention relates to a system for generating electric power by recovering the waste heat of materials at the top of a fractionating tower, and belongs to the technical field of waste heat recovery. The system comprises the fractionating tower, a tower top cooler, a tower bottom material heater, a valve, connecting pipelines, an organic working medium evaporator, a turbine, a speed reducer, a generator, a steam condenser, a working medium well and a working medium pump, wherein a connecting relationship of the system is that a tower top outlet of the fractionating tower is connected with the organic working medium evaporator which is connected with the tower top cooler; a tower bottom inlet of the fractionating tower is connected with the tower bottom heater; an outlet of the organic working medium evaporator is connected with the turbine, and the turbine is connected with the steam condenser, and is connected with the speed reducer and the generator through a shaft; the steam condenser is connected with the working medium well which is connected with the working medium pump. According to the system, the waste heater of the materials at the top of the fractionating tower is used for generating electric power to meet a part of electric power utilization requirements on a material processing plant, so that energy resources are saved, emissions are reduced, the utilization efficiency of primary energy resources is improved, and the using cost of an electric power user is reduced.

Description

technical field [0001] The invention belongs to the technical field of waste heat recovery, and in particular relates to the structural design of a power generation system utilizing the waste heat of materials at the top of a fractionation tower. Background technique [0002] The main function of the fractionation tower is to heat the material to be recovered to a predetermined distillation temperature according to the distillation temperature of different components, let it evaporate into a gaseous state, and then cool it into a liquid product through the cooler at the top of the fractionation tower and Transported to the tank farm for storage. The structure and working process of the existing fractionation tower system are as follows: figure 1 As shown, the system includes: a fractionation tower 01, a cooler 02 connected to the top of the tower and a heater 03 connected to the bottom of the tower; its working process is: the normal temperature material a is heated by the ...

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Problems solved by technology

[0003] In this process, in order to maintain the fractionation temperature of the fractionation tower, it is necessary to continuously provide heat to the fractionation tower. At the same time, there is a large amount of sensible heat and latent heat of the finished material at the top of the tower, which is finally discharged through the cooling device, resulting in a large waste of energy.

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