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Blast furnace and hot blast stove constant-pressure changing system and method thereof

A technology of hot blast stove and blast furnace, applied in blast furnace, blast furnace details, blast furnace parts, etc., which can solve the problems of increased control difficulty and high hardware investment

Inactive Publication Date: 2014-07-16
上海金自天正信息技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It has added new equipment, and the hardware investment is also high, which increases the difficulty of control

Method used

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  • Blast furnace and hot blast stove constant-pressure changing system and method thereof
  • Blast furnace and hot blast stove constant-pressure changing system and method thereof

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0022] figure 1 It is a structural schematic diagram of the blast furnace hot blast stove constant pressure furnace replacement system of the present invention.

[0023] Such as figure 1 As shown, the blast furnace hot blast stove constant pressure furnace replacement system includes: a blast furnace 51 , three hot blast stoves 52 and a blower station 54 .

[0024] The three hot blast stoves 52 are marked as hot blast stove A, hot blast stove B, and hot blast stove C respectively.

[0025] Each hot blast stove has: combustion-supporting air regulating valve 3, combustion-supporting air combustion valve 4, hot air valve 5, gas regulating valve 6, gas cut-off valve 7, gas release valve 8, gas combustion valve 9, flue valve 10, pressure charging Valve 11, cold air valve 12, waste gas valve 13, flue valve 14, cold air regulating valve 15.

[00...

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Abstract

The invention provides a blast furnace and hot blast stove constant-pressure changing system. The system comprises a blast furnace, a plurality of hot blast stoves and an air blower station, wherein an air blower in the air blower station has a fixed wind pressure control mode and a fixed wind quantity control mode. When a control system of the blast furnace sends a hot blast stove changing signal, the air blower is switched to the fixed wind pressure control mode while when the control system of the blast furnace sends a hot blast stove changing finishing signal, the air blower is switched to the fixed wind quantity control mode. The system has the advantages that the pressures of a cold wind general pipe and a hot wind general pipe in change of the hot blast stoves are maintained stable, the change of the hot blast stoves is ensured smooth, the influence of change of the hot blast stoves on the blast furnace is reduced, and the adjusting frequency of a pressurizing valve is further reduced, so that the stove changing time is shortened. A control program is newly added to operate on the existing upper computer of the control system and existing hardware equipment is fully utilized, so that the system is less in investment and convenient to retrofit.

Description

technical field [0001] The invention relates to a blast furnace hot blast stove constant-pressure furnace changing system and a method thereof, which keep the blast furnace hot blast pressure stable during the hot blast stove changing process. Background technique [0002] The normal smelting of the blast furnace requires smooth and continuous hot air, and the hot blast stove is a device that provides high-temperature hot air for the blast furnace smelting. The fluctuation of the hot blast pressure is not good for the smooth operation of the blast furnace. Generally, the blast furnace is equipped with three to four hot blast stoves. The hot blast stoves have three states: combustion, air supply, and braising. It must be ensured that at least one hot blast stove is in the air supply state. After the hot blast stove burns and the temperature of the hot blast stove vault in the air supply is still high, it will switch to the state of simmering furnace, wait for the temperature...

Claims

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Application Information

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IPC IPC(8): C21B9/10
Inventor 刘开勇王会芝蒋宇佳朱键周鸽成马杰屠源东张贵成谷宇郑彩英
Owner 上海金自天正信息技术有限公司
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