Cold start oil auxiliary heating system of boiler and heat source-less independent starting method of generating set

Abstract

The invention discloses a cold start oil auxiliary heating system of a boiler and a heat source-less independent starting method of a generating set. The method includes the following steps that: mounting a set of small oil gun igniting system at an inlet air passage of a coal mill for preheating the cold air entering the coal mill and enabling the coal mill to satisfy the working conditions; communicating coal economizer ash conveying gas source of the boiler with a soot blowing steam pipeline of an air preheater through a shutoff valve for supplying soot blowing medium of the air preheater; starting a shaft seal steam valve on a main steam pipeline after the boiler is ignited for supplying steam for shaft seal of a turbine; and supplying steam to an auxiliary steam header of the generating set after the boiler is ignited and the combustion steam reaches a certain parameter, and then supplying steam by the auxiliary steam header for the rolling of a water thermal power deoxidizing and steam-driven feedwater pump. The invention has the advantages that as the cold start of the generating set can be realized through the ignition of the plasma installed in the combustor and the stable combustion technology under the conditions that no starting boiler room is independently established or the external heat source is insufficient, and the operating cost and the labor cost of the power plant are greatly reduced.

Description

【Technical field】 [0001] The invention relates to a cold start of a thermal power generating set, in particular to a boiler cold start oil auxiliary heating system and a method for starting a generating set without a heat source after using the system. 【Background technique】 [0002] During the start-up stage of the generator set, there are four ways for the boiler to ignite pulverized coal: fuel oil ignition, low-oil ignition, micro-oil ignition, and plasma ignition. my country's oil resources are short, but the consumption is huge. Saving and replacing fuel oil has become an important measure to ensure national energy and economic security. In order to implement the country's "Medium- and Long-Term Special Plan for Energy Conservation", my country has incorporated fuel saving and oil substitution in thermal power plants into ten key energy-saving projects, and vigorously promoted the construction of "fuel-free demonstration power plants". And as the price of oil continues...

AI Technical Summary

Problems solved by technology

For power plants with two or fewer units newly built, in addition to the need to increase the start-up boiler room construction funds, the start-up costs are also greatly increased due to the large amount of fuel consumed by the start-up boilers

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