CN-122012831-A - Blast furnace stokehold cooling control system and method

CN122012831ACN 122012831 ACN122012831 ACN 122012831ACN-122012831-A

Abstract

The invention discloses a cooling control system and method in front of a blast furnace, wherein the system comprises an iron notch opening machine, a hydraulic mud gun and a control unit, the iron notch opening machine is used for opening a blast furnace iron notch, the hydraulic mud gun is used for plugging the blast furnace iron notch after tapping, the control unit is electrically connected with the iron notch opening machine and the hydraulic mud gun, when the iron notch opening machine starts to open the iron notch, the control unit controls a cooling pipeline valve of a bridge and a cooling pipeline valve of a mud gun foundation guard to be opened, and when the hydraulic mud gun ends to plug the iron notch, the control unit controls a cooling pipeline valve part of the bridge to be closed and controls the cooling pipeline valve of the mud gun foundation guard to be closed. The invention realizes the automatic control of the valve state of the cooling pipeline of stokehole equipment such as bridge passing, basic protection of the gun and the like according to the operation start and stop of the tapping machine and the hydraulic gun through the signal transmission of the tapping machine, the hydraulic gun and the control unit, and achieves the aims of both reliable cooling and resource saving.

Inventors

ZHENG NAN
Pan Tianmeng
WU ZHIHONG
SHEN KEZHENG
WANG CHEN
ZHAO JIDONG

Assignees

中冶京诚工程技术有限公司

Dates

Publication Date: 20260512
Application Date: 20241112

Claims (10)

1. The cooling control system for the front of the blast furnace is characterized by comprising an iron notch opening machine, a hydraulic mud gun and a control unit, wherein the iron notch opening machine is used for opening a blast furnace iron notch, and the hydraulic mud gun is used for plugging the blast furnace iron notch after tapping; The control unit is electrically connected with the iron notch opening machine and the hydraulic mud gun, when the iron notch opening machine starts to open an iron notch, the control unit controls the cooling pipeline valve of the bridge and the cooling pipeline valve of the mud gun foundation protection to be opened, and when the hydraulic mud gun ends the blocking operation, the control unit controls the cooling pipeline valve of the bridge to be partially closed and controls the cooling pipeline valve of the mud gun foundation protection to be closed.
2. The blast furnace stokehold cooling control system according to claim 1, wherein the control unit comprises a first control module and a second control module, the first control module is used for controlling the opening and closing of a cooling pipeline valve of a gap bridge, and the second control module is used for controlling the opening and closing of a cooling pipeline valve of a mud gun foundation protection.
3. The blast furnace stokehole cooling control system according to claim 1, wherein an atomization device and an atomization control module are arranged on the tapping machine, the atomization control module is electrically connected between the tapping machine and a control valve of the atomization device, when the tapping machine starts tapping operation, the atomization control module controls the control valve of the atomization device to be opened, and when the tapping machine ends tapping operation, the atomization control module controls the control valve of the atomization device to be closed.
4. A blast furnace stokehold cooling control system according to claim 3, wherein the control unit is electrically connected with the atomizing device, and when the tapping machine and/or the atomizing device start to work, the control unit controls the opening of a cooling pipeline valve of a bridge and a cooling pipeline valve of a mud gun foundation shield.
5. The blast furnace stokehold cooling control system according to claim 1, wherein a stemming cooling device and a cooling control module are arranged on the hydraulic mud gun, the cooling control module is electrically connected between the hydraulic mud gun and a control valve of the stemming cooling device, when the hydraulic mud gun starts to perform a plugging operation, the cooling control module controls the control valve of the stemming cooling device to be opened, and when the hydraulic mud gun ends to perform the plugging operation, the cooling control module controls the control valve of the stemming cooling device to be closed.
6. The blast furnace stokehold cooling control system according to claim 5, wherein a gun nozzle flushing device and a flushing control module are further arranged on the hydraulic mud gun, the flushing control module is electrically connected between the hydraulic mud gun and a control valve of the gun nozzle flushing device, when the hydraulic mud gun finishes the plugging operation, the flushing control module controls the control valve of the gun nozzle flushing device to be opened, and after the flushing preset time is reached, the flushing control module controls the control valve of the gun nozzle flushing device to be closed.
7. The blast furnace stokehold cooling control system according to claim 2, wherein a plurality of cooling water channels are arranged in parallel in the bridge, the plurality of cooling water channels can fully cover the bridge passing surface of the bridge, when the tapping machine starts tapping operation, the first control module controls the cooling pipeline valves of the cooling water channels to be opened, and when the hydraulic mud gun ends the tapping operation, the first control module controls the cooling pipeline valves of part of the cooling water channels to be closed.
8. The blast furnace stokehold cooling control system according to claim 2, wherein a cooling water channel which is in an S shape and fully covers the bridge deck of the bridge is arranged in the bridge, a cooling pipeline valve with adjustable opening is arranged on the cooling water channel, the first control module controls the cooling pipeline valve to be in a fully opened state when the tapping machine starts tapping operation, and the first control module controls the cooling pipeline valve of the cooling water channel to be in an incompletely opened state when the hydraulic mud gun ends plugging operation.
9. A blast furnace stokehold cooling control method, characterized in that the blast furnace stokehold cooling control method is implemented by the blast furnace stokehold cooling control system according to any one of claims 1 to 8, comprising: Acquiring a tapping operation starting signal of the tapping machine; after a tapping operation starting signal of the tapping machine is obtained, the control unit controls a cooling pipeline valve of a bridge and a cooling pipeline valve of mud gun foundation protection to be opened based on the tapping operation starting signal of the tapping machine; Acquiring a stop signal of the plugging operation of the hydraulic mud gun; after the blocking operation stop signal of the hydraulic mud gun is obtained, the control unit controls the cooling pipeline valve part of the bridge to be closed and controls the cooling pipeline valve of the mud gun foundation protection to be closed based on the blocking operation stop signal of the hydraulic mud gun.
10. The method for controlling cooling of a blast furnace according to claim 9, wherein when a feed motor of the tapping machine starts feeding, the tapping machine sends a tapping operation start signal to the control unit, and when a pressure maintaining of a rotary cylinder of the hydraulic mud gun reaches a preset time requirement, the hydraulic mud gun sends a plugging operation stop signal to the control unit.

Description

Blast furnace stokehold cooling control system and method Technical Field The invention relates to the technical field of cooling of a blast furnace, in particular to a cooling control system and method of the blast furnace. Background The operation of the blast furnace is that the place for tapping slag and treating slag iron is in front of the blast furnace, and the operation comprises the operation taking tapping slag as main content, the maintenance of a tap hole formed for tapping slag, the maintenance of a skimming device and a slag iron runner, the maintenance of tapping equipment in front of the blast furnace, the replacement of a tuyere and the like. In the tapping process of the blast furnace, even if the blast furnace is covered by the slag runner cover plate, a phenomenon of overhigh temperature still exists in a plurality of areas in front of the blast furnace, particularly, the areas close to the tap hole of the blast furnace, and most of main runners are in an open state due to frequent switching operation of the tap hole machine opening and the mud gun plugging, so that molten iron is directly baked to surrounding equipment and facilities, and the service cycle of the equipment and facilities is greatly reduced. Therefore, equipment and facilities in a high-temperature area in front of the furnace are usually protected by adopting a water cooling method, so that the service life of the equipment and facilities is prolonged, and the service life of the equipment and facilities is prolonged. The blast furnace stokehold cooling system mainly comprises a water-cooling bridge cooling device, a mud gun foundation protection device cooling device, a mud gun body cooling device, a mud gun nozzle flushing device, an atomizing device, a stokehold hydraulic system cooling device and the like. In the tapping process of the blast furnace, the area above the iron notch is in a high-temperature baking state, so that the air port platform staff above the iron notch can normally pass through, patrol and maintain equipment, a water-cooling gap bridge is usually arranged above the iron notch of the blast furnace, the gap bridge is cooled by introducing cooling water into the gap bridge, baking of molten iron below the gap bridge is isolated to a certain extent, and the operation safety of the staff is ensured. In the tapping process of the blast furnace, the hydraulic gun foundation is also in a high-temperature molten iron baking state for a long time, the water-cooling protection device for the gun foundation is placed on the side, close to the main ditch, of the gun foundation, cooling water is introduced, good protection can be formed for the foundation, and the service cycle of equipment is prolonged. After tapping of the blast furnace, the hydraulic mud gun needs to quickly and accurately block the tap hole. In the process of plugging operation, the mud gun body is always in the baking of main ditch molten iron, so in order to improve the service life of equipment, cooling water is required to be introduced to cool the gun body. After the mud gun completes the plugging operation and the gun body rotates to the stand, the gun nozzle in a high-temperature state needs to be washed and cooled, so that serious burning loss of the gun nozzle is avoided. The tapping machine can produce a large amount of smoke and dust in the in-process of tapping, in order to avoid the smoke and dust loss, causes the pollution to the environment, when guaranteeing ventilation dust removal effect, needs to atomize the dust fall in the tapping position. At present, the cooling system in front of the blast furnace is in an independent state, and the cooling water is in a manual control state when the cooling water starts to be introduced and the cooling water ends to be introduced, so that equipment is easy to damage due to misoperation of personnel. In order to avoid the problems, some enterprises adopt a method of leading cooling water into a state for a long time, and the method can better protect equipment but can cause waste of a large amount of resource and energy. Disclosure of Invention The invention aims to provide a blast furnace front cooling control system, which solves the problem that the blast furnace front cooling system in the prior art cannot realize reliable cooling and avoid resource waste. The above object of the present invention can be achieved by the following technical solutions: The invention provides a cooling control system in front of a blast furnace, which comprises an iron notch opening machine, a hydraulic mud gun and a control unit, wherein the iron notch opening machine is used for opening a blast furnace iron notch, the hydraulic mud gun is used for plugging the blast furnace iron notch after tapping, the control unit is electrically connected with the iron notch machine and the hydraulic mud gun, when the iron notch opening machine starts to operate, the control unit controls a cooling pipeline