Method for coordinating and controlling steam pipe network and gas pipe network of metallurgical gas boilers

Abstract

The invention relates to the technical field of metallurgical gas boiler control, and discloses a method for coordinating and controlling a steam pipe network and a gas pipe network of metallurgical gas boilers. The method for coordinating and controlling the steam pipe network and the gas pipe network of the metallurgical gas boilers comprises the following steps that (1) pressure of the gas pipenetwork and pressure of the steam pipe network are collected in real time, when the pressure of the gas pipe network is within safety margin, a load regulation margin calculation module is used, andthe amount of load required to be distributed for each gas boiler is calculated according to load demands and real-time load states of the steam pipe network, and the number, specifications and typesof the gas boilers on the pipe network; (2) based on the amount of load calculated in (1) and combining the current load bearing and running conditions of the gas boilers, load adjusting amount of each gas boiler is finally determined through calculation with a gas boiler regulation and control module; (3) when the pressure of the gas pipe network is out of the safety margin, no matter how the load of the steam pipe network changes, the gas boilers on the pipe network have to reduce the load on each following the steps in (1) and (2); and (4) according to the load change of each gas boiler, the energy consumption is adjusted, and the coordination and balance between the gas pipe network and the steam pipe network is realized.

Description

technical field [0001] The invention relates to the field of metallurgical gas boiler control, in particular to a coordinated control method for a metallurgical gas boiler steam pipe network and a gas pipe network. Background technique [0002] With the continuous improvement of the production capacity of metallurgical enterprises, the gas production volume of blast furnaces and coke ovens is also increasing. In order to reduce air pollution caused by gas emissions, metallurgical enterprises have proposed plans to build new gas-fired boilers for power generation. In order to prevent environmental pollution, the use of gas-fired boilers has become a major development trend. In the metallurgical industry, gas-fired boilers are key equipment for energy conversion. They consume gas produced by blast furnaces and generate steam energy for power generation. [0003] The quality of steam (such as pressure, temperature, superheat) is the key parameter of the generator set. In order...

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Problems solved by technology

[0004] At present, the pressure of the gas pipe network in the metallurgical industry fluctuates greatly. Most of the gas boilers are operated manually. The pressure of the gas pipe network is too low, and the manual operation is not timely and other factors, which directly affect the safe operation of the boiler; the pressure of the gas pipe network is high, and the gas volume is sufficient. The steam load of the boiler is not adjusted in time, causing the gas to disperse, and energy waste will affect the effective use of energy and directly affect the overall economic operation of the steel plant; the pressure of the gas pipe network fluctuates greatly, and manual operation cannot meet the stability of the steam pressure, which directly affects the power generation efficiency and the stability of the gas pipeline network, etc.

In domestic iron and steel enterprises, the steam pipe network and the gas pipe network belong to two different systems. The load distribution of each gas-fired boiler is transferred by dispatching. The way of distribution affects the timeliness of boiler control; the level of operators of each gas-fired boiler is uneven, which intensifies the pressure fluctuation of the gas pipeline network, which not only causes waste of energy, but also affects the overall power generation of the power plant. Even further affect production safety

Although the control of gas boilers is actively developing, there is still a blind spot in the coordinated control of the steam pipe network and gas pipe network of gas boilers.

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