Multi-boiler system capable of automatic control and control method thereof

Abstract

The invention provides a multi-boiler system capable of automatic control and a control method thereof, and relates to the technical field of automatic control. According to the system, a steam main pipe is provided with a main pipe steam pressure gauge, a multi-boiler automatic control system is connected with a DCS automatic control system of each boiler system, the multi-boiler automatic control system obtains data acquired by a parameter detection gauge of each boiler system in real time, and the actual pressure value of the main pipe steam pressure gauge is monitored in real time. If it is discovered that the actual pressure value is not in accordance with a preset fixed pressure value, each DCS automatic control system is automatically coordinated and controlled to adjust corresponding rotating speeds of a coal feeder, a wind feeder, and a slag cooler and the water-feeding flow of a water feeding machine, the goal of the regulation of the steam pressure of the main pipe is achieved, automatic control of boilers can be realized, manual adjustment is not needed, the loss due to non-timely adjustment is reduced, the main pipe steam pressure of the two boilers can be guaranteed to be stable, the steam-outlet quality is guaranteed, and energy waste is reduced.

Description

technical field [0001] The invention relates to the technical field of automatic control, in particular to an automatically controllable multi-boiler system and a control method thereof. Background technique [0002] Boiler is a kind of energy conversion equipment. The energy input to the boiler is in the form of chemical energy in fuel, electric energy, heat energy of high-temperature flue gas, etc. After conversion by the boiler, it outputs steam, high-temperature water or organic heat carrier with certain heat energy. . The hot water or steam generated in the boiler can directly provide the required heat energy for industrial production and people's life. The boiler that generates steam is called a steam boiler, often referred to as a boiler, and is mostly used in thermal power stations, ships, locomotives, and industrial and mining enterprises. [0003] In the existing thermal power plants with combined heat and power, the steam supply of multiple boilers is controlled...

AI Technical Summary

Problems solved by technology

[0003] In the existing thermal power plants with combined heat and power, the steam supply of multiple boilers is controlled by the main pipe, and the control of the boilers is controlled by the DCS control system of each boiler. The coordination of the steam supply of the main pipe is through each boiler. The communication between the controllers is coordinated. This form of control is a relatively mature and common control method, but this control method also has its imperfections: 1. This control method has extremely high requirements for the controllers. Even for experienced personnel, there will be problems such as control lag, untimely adjustment and waste.

2. The coordination between multiple furnaces is through human communication, and the load regulation of the entire thermal power station will also lag behind, resulting in large fluctuations in the flow, pressure, and temperature of the heating supply, and ultimately resulting in waste of energy

This utility model realizes the linkage control of multiple boilers, and can automatically adjust the number of boilers in operation and the size of the fire according to the needs of the heat load. However, its realization depends on complex hardware circuits, and the cost is high. It only needs to adjust the number of boilers in operation and the size of the fire. The size of the fire cannot guarantee that the steam pressure of the main tube of multiple boilers can be stable, and the quality of the steam output cannot be guaranteed, which may cause waste of energy

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