热电厂循环水余热利用方案

热电厂循环水余热利用方案

摘要

利用制冷剂循环水余热利用技术在热电厂中进行电力发电，可以有效

提高电厂热效率,提高发电量，缩小单位电量的电耗。本文重点探讨了制

冷剂循环水余热利用系统的工作原理、节能经济分析和详细方案等内容。

通过分析，可以看出，制冷剂循环水余热利用技术在热电厂中的应用具有

可行性，可以在热电厂中进行发电，提高电厂热效率，降低单位发电量的

电耗以及提高整体的投资回收期等经济利益。

关键词：制冷剂循环；水余热；利用技术；热电厂

Introduction

Working Principle

This technology implements that, in the pro-cess of

electricity generation in a power plant, the condensed water cooling system will be routed to the generator cooling system, and then the cooling cycle water is collected into a waste heat recovery system for reheating power generation. The system consists of cooling cycle water waste heat recovery device, reheater and auxiliary. When water in the condenser is cooled,

the heat absorbed by the cooling cycle water can be recovered by the waste heat recovery equipment and sent to the heater of the steam turbine cycle and then goes into the reheater. In this way, the amount of steam extracted from the turbine reduces, and the

exhaust pressure before the turbine increases, resulting in an increase in the electrical efficiency of the power plant.

Analysis of Energy-saving and Economical Benefits

The application of cooling cycle water waste heat

utilization technology in power plants can effectively improve the thermal efficiency of the power plants and increase power generation. The unit electrical consumption can be reduced and the economic benefits of the project can be improved. Therefore, it is of great significance for the development of energy saving and efficiency of a power plant to utilize the cooling cycle water waste heat.

The economic analysis results show that, after the application of cooling cycle water waste heat utilization technology, the power plant's thermal efficiency can be increased by 4.6%, the power generation increased by 7.2%, and the unit power consumption decreased by 10.6%. And the annual energy saving is 4.48 x 104 tons of standard coal. In addition, the payback period of the investment is 1.4 years.

Detailed Scheme

2. Reheater selection.In the rehe