Boiler system with steam recovery device

Abstract

A boiler system with a steam recovery device comprises a first boiler and a second boiler. The two boilers are respectively connected with a steam female pipe through main throttle valves, a steam turbine and a temperature and pressure reducer is connected with the steam female pipe, a first recovery pipeline is arranged between the first boiler and a first main throttle valve, a second recovery pipeline is arranged between the second boiler and a second main throttle valve, recovery valves are arranged on the first recovery pipeline and the second recovery pipeline, and the first recovery pipeline and the second recovery pipeline are communicated with the temperature reducer. Due to the fact that the steam recovery pipelines connected with the temperature reducer are arranged between the boilers and the main throttle valves, when one boiler in the system is in fault, steam temperature cannot meet the lowest working requirements of the steam turbine, or steam pressure generated in a lighting stage is disqualified, evacuation operation is avoided, and steam can be recycled by the steam recovery pipeline so as to save a lot of steam and reduce pollution of evacuation noise on the environment.

Description

technical field [0001] The invention relates to a boiler system, in particular to a boiler system with a steam recovery device. Background technique [0002] Switchable main pipe The main steam pipeline system is widely used in large, medium and small thermal power plants. Multiple boilers in this system supply high-temperature and high-pressure steam to the back-pressure steam turbine for power generation through switchable main pipes, and then discharge low-temperature and low-pressure steam. The main pipe is supplied to enterprises that need to use steam to produce products such as chemical fertilizers. When the steam turbine is shut down for maintenance, in order to ensure the demand for low-temperature and low-pressure steam in the subsequent section, the high-temperature and high-pressure steam can be discharged through the temperature and pressure reducer arranged on the main pipe. After decompression and cooling, it is sent to enterprises that need to use steam to pr...

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Problems solved by technology

[0003] There is a defect in the operation of the system: because there are steam turbines in the system that have high requirements for steam pressure and temperature, when a boiler in the system reduces the load due to a failure and the steam temperature does not meet the minimum requirements for the operation of the steam turbine, It is necessary to remove the boiler from the system and discharge a large amount of steam to the air by means of venting, until the temperature of the boiler steam reaches the minimum requirement of the steam turbine, it can be integrated into the system for operation, which leads to a large amount of waste of steam

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