CN-122007357-A - Steam overflow prevention control system and control method for continuous casting crystallizer

CN122007357ACN 122007357 ACN122007357 ACN 122007357ACN-122007357-A

Abstract

The application discloses a steam overflow prevention control system and a control method for a continuous casting crystallizer, and belongs to the technical field of continuous casting crystallizers. The steam exhaust system can ensure that the upper part of the crystallizer is tightly sealed, can effectively prevent steam from corroding the width-adjusting motor, can realize the rapid and convenient disassembly and assembly of the cover plate, and can be intelligently adjusted. The control system comprises a continuous casting crystallizer body and a sealing cover, wherein the sealing cover comprises a sealing cover body and a sealing plate, attractive force is generated between the sealing plate and the magnetic piece, and through holes are formed in positions corresponding to the sealing plate, so that the interior of the continuous casting crystallizer is sealed. The sealing plate comprises at least one movable cover plate, and the movable cover plate is provided with a universal shaft hole through which the universal shaft can pass. The control system further comprises a second air cooler, an induced draft fan, a controller, a first humidity detection part and a second humidity detection part, and the second air cooler, the induced draft fan, the first humidity detection part and the second humidity detection part are electrically connected with the controller.

Inventors

ZHANG KUN
HAO DONGBIN
WANG JINGJUAN
CHANG SHENGCAI
SHI LIANG
PANG GUANWEI
LIU FENGGUO
ZHANG JIAN
Lv Yongxue

Assignees

首钢京唐钢铁联合有限责任公司

Dates

Publication Date: 20260512
Application Date: 20260209

Claims (10)

1. The steam overflow prevention control system of the continuous casting crystallizer is characterized by comprising a continuous casting crystallizer body and a sealing cover arranged at one side of an opening of the continuous casting crystallizer body, wherein the sealing cover can enable the interior of the continuous casting crystallizer to form a sealing space; the sealing cover includes: the sealing cover comprises a sealing cover body, a magnetic part and a sealing cover, wherein the sealing cover body is provided with at least one through hole; At least one sealing plate which generates attractive force between the sealing plate and the magnetic member and covers the through holes at corresponding positions so as to seal the interior of the continuous casting mold; The sealing plate comprises at least one movable cover plate, the movable cover plate comprises a first cover plate and a second cover plate, and the first cover plate and the second cover plate can move relatively; the first cover plate is provided with a first shaft hole, the second cover plate is provided with a second shaft hole, the first shaft hole and the second shaft hole form a universal shaft hole when the axes of the first shaft hole and the second shaft hole are overlapped, and the radius of the universal shaft hole is larger than that of the universal shaft, so that the universal shaft can pass through the universal shaft hole; the steam overflow prevention control system of the continuous casting crystallizer further comprises two air coolers, an induced draft fan and a controller, wherein the two air coolers are used for discharging steam in the continuous casting crystallizer through a steam discharging main pipe, and the induced draft fan is connected with the movable cover plate through an induced draft pipe and used for inducing air to the universal shaft hole; The steam exhaust manifold is provided with a first humidity detection part, the universal shaft hole is provided with a second humidity detection part, and the two air coolers, the induced draft fan, the first humidity detection part and the second humidity detection part are electrically connected with the controller.
2. The vapor overflow prevention control system of a continuous casting mold according to claim 1, wherein the sealing plate comprises two movable cover plates which are relatively movable and respectively have a first thickness and a second thickness, and the first thickness is larger than the second thickness; The movable cover plate with the first thickness is provided with a mounting groove on one side facing the movable cover plate with the second thickness, and one side facing the movable cover plate with the first thickness can be inserted into the mounting groove to connect the two movable cover plates.
3. The steam overflow prevention control system of the continuous casting crystallizer according to claim 1, wherein a horn cover is arranged on one side of the movable cover plate, which is positioned in the continuous casting crystallizer, one end of the horn cover is connected with the universal shaft hole, and the diameter of the horn cover gradually increases along the direction away from the universal shaft hole; the utility model discloses a continuous casting crystallizer, including the loudspeaker cover, be provided with a plurality of blowpipes on the loudspeaker cover, the axis of blowpipe with universal shaft hole axis is parallel, the air intake of blowpipe with the induced air pipe intercommunication, the air outlet of blowpipe orientation the inside of continuous casting crystallizer.
4. A continuous casting mould anti-vapour overflow control system according to claim 3, characterised in that a plurality of said blowpipes are distributed in a rotating array on the barrel of said hood around the axis of the barrel of said hood.
5. The steam overflow prevention control system of the continuous casting crystallizer according to claim 3, wherein an annular hose is further arranged on one side of the movable cover plate, which is positioned outside the sealing plate, and a plurality of blowpipes are communicated with the induced draft fan through the annular hose.
6. The steam overflow prevention control system of a continuous casting mold according to claim 5, wherein the annular hose comprises a first sub-hose arranged on the first cover plate and a second sub-hose arranged on the second cover plate, and the first sub-hose is connected with the second sub-hose through a quick connector.
7. A method for controlling steam overflow prevention of a continuous casting mold, which is applied to the steam overflow prevention control system of a continuous casting mold according to any one of claims 1 to 6, comprising: If a casting state signal of the continuous casting machine is received, acquiring a first humidity at the steam exhaust main pipe and a second humidity at the universal shaft hole, and controlling the rotating speed of the two air coolers and the rotating speed of the induced draft fan according to the first humidity and the second humidity; The first humidity and the rotating speed of the two air coolers have a first mapping relation, the second humidity and the rotating speed of the two air coolers have a second mapping relation, and the second humidity and the rotating speed of the induced draft fan have a third mapping relation.
8. The method for controlling steam overflow prevention of a continuous casting mold according to claim 7, wherein controlling the rotational speeds of the two air coolers and the rotational speed of the induced draft fan according to the first humidity and the second humidity comprises: if the second humidity is smaller than or equal to a first preset humidity, controlling the rotating speed of the two air coolers according to the first mapping relation and the first humidity; If the second humidity is greater than the first preset humidity and less than or equal to a second preset humidity, controlling the rotating speed of the two air coolers according to the second mapping relation and the second humidity, wherein the second preset humidity is greater than the first preset humidity, and the rotating speed of the two air coolers determined according to the second mapping relation and the second humidity is greater than the rotating speed of the two air coolers determined according to the first mapping relation and the first humidity; And if the second humidity is greater than the second preset humidity, controlling the rotating speeds of the two air coolers according to the second mapping relation and the second humidity, controlling the induced draft fan to work at the same time, and controlling the rotating speeds of the induced draft fan according to the third mapping relation and the second humidity.
9. The method for controlling steam overflow prevention of a continuous casting mold according to claim 8, wherein the interval time between each adjustment of the rotational speeds of the two air coolers is smaller than the first preset time.
10. The steam overflow prevention control method of a continuous casting mold according to any one of claims 7 to 9, characterized by further comprising: when a casting state signal of the continuous casting machine is received, the two air coolers are controlled to operate at a first preset rotating speed.

Description

Steam overflow prevention control system and control method for continuous casting crystallizer Technical Field The application belongs to the technical field of continuous casting crystallizers, and particularly relates to a steam overflow prevention control system and a control method for a continuous casting crystallizer. Background Continuous casting steel is one of the core processes of modern steel production. In the continuous casting process, high-temperature molten steel is cooled in a crystallizer by high-pressure water of a copper plate of the high-temperature molten steel, and is quickly solidified into a blank shell with a certain thickness. And then, the casting blank is pulled out of the crystallizer and enters a secondary cooling zone (secondary cooling zone), and the internal liquid core of the casting blank reaches the solidification requirement through water spray cooling, so that the continuous casting blank is finally formed. In the process, the cooling water in the secondary cooling area is contacted with the high-temperature casting blank, and a large amount of high-temperature steam is generated. These vapors are usually confined in relatively closed secondary cooling chambers and are forced to be drawn away by the negative pressure created by the secondary cooling fans to prevent them from overflowing into the production plant, affecting equipment safety, production environment and product quality. However, since the mold is spatially connected to the two cooling chambers and the mold is located at the upper portion of the casting process, if the upper portion of the mold is not tightly closed, the high temperature steam of the two cooling chambers may first overflow from the upper portion of the mold. This not only worsens the operating environment, but, more seriously, can cause erosion and damage to critical equipment above and around the crystallizer. At present, the upper part is sealed mainly by arranging a crystallizer cover plate in production. However, due to frequent routine maintenance and treatment faults, the crown block is required to frequently hoist the cover plate, which puts high demands on the convenience and sealing reliability of the design of the cover plate. In order to realize online adjustment of the width of a casting blank, a width adjusting motor drives a crystallizer copper plate through a transmission mechanism such as a universal shaft and the like. The arrangement of the motor faces a dilemma: If the motor is enclosed in the cover plate of the crystallizer, the motor is in a high-temperature steam risk environment although the whole structure is relatively simple. Even if the motor is provided with a sealing cover alone and compressed air is introduced to maintain positive pressure, the continuity of the positive pressure is difficult to ensure absolutely. More importantly, steam is extremely easy to invade the inside of the motor from the movable gap at the joint of the motor output shaft and the universal shaft, so that the insulation of the motor is reduced, parts are rusted, and the service life of the motor is obviously shortened. If the motor is arranged outside the cover plate, the motor can avoid the main steam area, but the shape of the cover plate of the crystallizer becomes extremely complex, and effective integral sealing is difficult to realize. Meanwhile, the special-shaped cover plate is difficult to disassemble and install, and the overhaul efficiency is seriously affected. Therefore, a steam exhaust system capable of ensuring tight sealing of the upper part of the crystallizer, effectively preventing steam erosion from widening the motor, realizing rapid and convenient disassembly and assembly of the cover plate and realizing intelligent regulation is needed. Disclosure of Invention The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, the application provides a steam overflow prevention control system and a control method for a continuous casting crystallizer, which can ensure that the upper part of the crystallizer is tightly sealed, can effectively prevent steam from corroding a width-adjusting motor, can realize rapid and convenient disassembly and assembly of a cover plate, can intelligently adjust steam discharge, and can prevent the steam overflow of the continuous casting crystallizer. In a first aspect, an embodiment of the present application provides a steam overflow prevention control system for a continuous casting mold, including: The continuous casting crystallizer comprises a continuous casting crystallizer body and a sealing cover arranged on one side of an opening of the continuous casting crystallizer body, wherein the sealing cover can enable the interior of the continuous casting crystallizer to form a sealing space; the sealing cover includes: the sealing cover comprises a sealing cover body, a magnetic part and a sealing cover, wherein the sealing cove