Design and feasibility verification of regenerative system of electric thermal storage boiler for peak shaving in summer in power plant

Zeyang Li,J Zhu,Xiaobo Wang,Hang Wang,Yingying Yao,Zhongzhou Dou

doi:10.1051/matecconf/202235502060

Abstract

During the heating period, the thermal storage electric boiler helps the thermal power units to participate in the deep peak regulation by converting the electric energy into heat energy for heating users, but in the non-heating period, the thermal storage electric boiler can not operate because there is no heat user, as a result, the thermal storage electric boiler is shut down in summer, and can not assist the thermal power unit to participate in the deep peak regulation. Therefore, this paper designs an electric thermal storage boiler regenerative system for peak shaving in summer. In this regenerative system, electric boiler is used to heat circulating water in heating period, and electric boiler is used to heat condensed water in non-heating period, and in the non-heating period, the number of low-pressure heaters can be adjusted according to the load and heat storage capacity of the units, so that the electric boiler can assist the thermal power units to participate in the deep peak regulation throughout the year, taking a 350MW unit with 70MW regenerative electric boiler as an example, the heat exchange capacity is calculated to verify the feasibility of the regenerative system. In this paper, a new method of heating condensate by regenerative electric boiler in non-heating period is proposed to solve the problem that the new energy can not be used and the energy is wasted in summer.

Highlights

In order to promote the development of new energy in our country and focus on solving the problem of new energy consumption in the "three north" region, the state and local governments have adopted a series of measures to promote the development of new energy, to solve the problem of new energy development from various angles such as technology route and industrial policy[1,2,3,4]
This paper presents a regenerative system of electric thermal storage boiler for peak load regulation in summer, which is used to solve the technical problem of energy waste caused by waste wind power in summer
The main starting point of the design of regenerative electric boiler regenerative system is the coupling of regenerative electric boiler with heating network circulation system and condensate system, in winter, the auxiliary units of Electric Boiler and heat network circulation system are used to regulate the peak load and ensure the heat supply

Summary

Introduction

In order to promote the development of new energy in our country and focus on solving the problem of new energy consumption in the "three north" region, the state and local governments have adopted a series of measures to promote the development of new energy, to solve the problem of new energy development from various angles such as technology route and industrial policy[1,2,3,4]. Thermal storage boilers are widely used in cogeneration units because of their fast start-up and high load[5,6,7]. In the non-heating period, the peak-load regulation requirements and heating load of the unit are reduced, which leads to the shutdown of the thermal storage electric boiler in the non-heating period and the decrease of the equipment utilization ratio. This paper presents a regenerative system of electric thermal storage boiler for peak load regulation in summer, which is used to solve the technical problem of energy waste caused by waste wind power in summer

System design

System operation

Feasibility check

Findings

Conclusion