Temperature Control Method of Large Gas Pit Furnace

A temperature control method and gas technology, which are applied to furnace control devices, furnaces, and furnace components, etc., can solve problems such as affecting production continuity and gas waste, and achieve energy-saving rate improvement, continuity assurance, and oxidation and burning loss rate. Effect

Active Publication Date: 2017-03-01
LIUZHOU IRON & STEEL +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a temperature control method for a large-scale gas pit furnace, which can solve the problems affecting the continuity of production and the waste of gas that occur during the heating of billets of rods and wires

Method used

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Embodiment Construction

[0015] Below in conjunction with embodiment the present invention is described in further detail: the temperature control method of large-scale gas pit furnace,

[0016] 1) There is a pit body with three furnace temperature control zones;

[0017] 2) Each temperature control zone is equipped with a temperature sensor, a flue gas sampling probe, an electromagnetic gas control valve to control the supply of gas to the temperature control zone, and an electromagnetic air control valve to control the supply of air to the temperature control zone;

[0018] 3) The temperature regulator controls the opening of the electromagnetic gas control valve and the electromagnetic air control valve in sequence, thereby controlling the gas flow and air flow; after each output adjustment signal is executed, it must be output again after an interval of 200 seconds adjust the signal;

[0019] The basic air input volume and gas basic input volume of each temperature control zone are determined acc...

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Abstract

The invention discloses a temperature control method of a large fuel gas furnace, and relates to the technical field of steel rolling. The temperature control method comprises a plurality of FBT (Furnace Box Temperature) control areas; each temperature control area is provided with a temperature sensor, a glue gas sampling probe, an electromagnetic fuel gas control valve and an electromagnetic air control valve, wherein the temperature regulator controls the opening degrees of the electromagnetic fuel gas control valve and the electromagnetic air control valve; the initial air input and the initial fuel gas input of each temperature control area are determined according to the following formula: n is equal to (1-4)m, when O2 (Oxygen) is less than 2.5% and CO (Carbon Dioxide) is less than 20ppm; n is equal to (0.99-0.90) (1-4)m, when O2 is less than 2.5%; n is equal to (1.01-1.10) (1-4)m when CO is more than 20ppm. According to the temperature control method provided by the invention, the problems that the continuity and the waste of fuel gas can affect the production in the process of copper bar profiles can be solved.

Description

technical field [0001] The invention relates to the technical field of steel rolling, in particular to a method for controlling the temperature of a large-scale gas-fired kiln for rods and wires. Background technique [0002] At present, most industrial kilns used for heating rods and wires are controlled by DCS (Distributed Control System), which is a distributed control system. In DCS, a double-crossing limiter control method is used to ensure a reasonable air-fuel ratio when the heat load changes. , and some add appropriate compensation signals to improve the response speed of the system. This method can effectively increase the response speed of the system by 3 to 5 times, making it adapt to changes in the kiln thermal load cycle and some sudden changes (such as entering and exiting Opening and closing of steel mouth and furnace door, sudden heat preservation for rolling, rapid temperature rise, sudden change of rolling rhythm, etc.). But this method has the following p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F27D19/00
Inventor 覃宝腾吴春平潘伟程金梁黄崇府梁林刘南劭
Owner LIUZHOU IRON & STEEL
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