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Combustion control method and device for an annealing furnace

A control method and an annealing furnace technology, applied in heat treatment process control, manufacturing tools, heat treatment equipment, etc., can solve problems such as combustion loop interference, combustion temperature control between non-combustible loops, and furnace temperature fluctuations

Active Publication Date: 2018-12-14
SHOUGANG ZHIXIN QIAN AN ELECTROMAGNETIC MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems existing in the prior art, the embodiment of the present invention provides a method and device for controlling the combustion of the annealing furnace, which is used to solve the problem that the combustion temperature between the combustion loops cannot be controlled in the prior art during the annealing process, resulting in Mutual interference between combustion loops and technical problems of fluctuating furnace temperature

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  • Combustion control method and device for an annealing furnace
  • Combustion control method and device for an annealing furnace

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Embodiment 1

[0032] This embodiment provides a method for controlling combustion in an annealing furnace, such as figure 1 As shown, the method includes the following steps:

[0033] Step 110, when it is determined that the temperature deviation of the loop preceding the current loop in the annealing furnace is a positive deviation, or when the temperature deviation of a loop next to the current loop is determined to be a negative deviation, a temperature compensation algorithm is triggered.

[0034] In this step, when it is determined that the temperature deviation of the previous loop of the current loop in the annealing furnace is a positive deviation, or when the temperature deviation of the next loop of the current loop is determined to be a negative deviation, a temperature compensation algorithm is triggered.

[0035] Specifically, the temperature deviation of the last loop can be calculated according to formula (1):

[0036] DV1=PV1-SV1 (1)

[0037] In the formula (1), DV1 is the...

Embodiment 2

[0055] Corresponding to Embodiment 1, this embodiment also provides a control device for annealing furnace combustion, such as figure 2 As shown, the device includes: a first determination unit 21, a first calculation unit 22, a second calculation unit 23 and a control unit 24; wherein,

[0056] The first determining unit 21 is used to trigger temperature compensation when determining that the temperature deviation of the previous loop of the current loop in the annealing furnace is a positive deviation, or when determining that the temperature deviation of the next loop of the current loop is a negative deviation Calculate.

[0057] Specifically, the temperature deviation of the last loop can be calculated according to formula (1):

[0058] DV1=PV1-SV1 (1)

[0059] In the formula (1), DV1 is the temperature deviation of the previous loop, and when the DV1>P04, the DV1 is a positive deviation; wherein, the PV1 is the actual temperature value of the previous loop, so The ab...

Embodiment 3

[0076] In practical application, when using the control method provided in Embodiment 1 and the control device provided in Embodiment 2 to control the three combustion loops of the annealing furnace with A, B, and C soaking sections, the specific implementation is as follows:

[0077] Among them, B is the current combustion loop, A is the previous loop of the current loop, C is the next loop of the current loop, and the furnace temperature is set to 1200°C, that is, SV1=SV2=SV3=1200°C; SV1 is A loop furnace temperature setting value, SV2 is the B loop furnace temperature setting value, SV3 is the C loop furnace temperature setting value. If the actual furnace temperature of the A loop is 1206°C, the actual furnace temperature of the B loop is 1120°C, and the actual furnace temperature of the C loop is 1196°C.

[0078] Then the temperature deviation of the previous loop A can be calculated according to formula (1):

[0079] DV1=PV1-SV1 (1)

[0080] The value of DV1 calculated...

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Abstract

The invention provides an annealing furnace combustion control method and device. The method includes: when the temperature deviation of a loop previous to a current loop in an annealing furnace is determined as positive deviation, or the temperature deviation of a loop next to the current loop is determined as negative deviation, triggering temperature compensation algorithm; calculating a temperature compensation value between the loops according to the temperature compensation algorithm; calculating a compensated combustion control value of the current loop according to the temperature compensation value between the loops; and controlling the combustion temperature of the current loop according to the compensated combustion control value. Therefore, when positive deviation appears in the previous loop, the temperature compensation value of the current loop is decreased, thus reducing the calorific value contribution of the current loop to the previous loop; and when negative deviation appears in the next loop, the temperature compensation value of the current loop is increased, thus reducing the calorific value loss of the next loop. In the way, mutual interference of the combustion loops and furnace temperature fluctuation can be avoided.

Description

technical field [0001] The invention belongs to the technical field of iron and steel smelting, and in particular relates to a method and device for controlling combustion in an annealing furnace. Background technique [0002] The rotary annealing furnace is an important equipment in the annealing process of iron and steel smelting. The stability of the furnace condition is very important during the annealing process, which directly affects the quality of the strip product. [0003] In actual production, the annealing furnace controls the output temperature by adjusting the output heat of the burner. Due to the mutual interference between the combustion loops of the annealing furnace, it is easy to cause the burner to open and close at intervals. The interval opening and closing of the burner causes the furnace temperature to fluctuate. It is difficult to effectively control the temperature control accuracy. Moreover, the interval opening and closing of the burner further c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D1/52C21D11/00C21D1/26
CPCC21D1/26C21D1/52C21D11/00
Inventor 郝晓鹏刘良朱吉声苗贺武张叶成齐杰斌张红军韩灵彦
Owner SHOUGANG ZHIXIN QIAN AN ELECTROMAGNETIC MATERIALS CO LTD