CN-121992167-A - Control system and method for online switching of double converter gas tanks
Abstract
The invention discloses a control system and a method for online switching of a double-converter gas holder. The gas recovery device comprises a first converter gas tank and a second converter gas tank which are connected between a gas recovery main pipe in front of the tank and a gas recovery main pipe behind the tank, wherein an inlet electric butterfly valve is at least arranged on an inlet pipeline of the first converter gas tank, an outlet electric butterfly valve is at least arranged on an outlet pipeline of the first converter gas tank, a piston position detection device is at least arranged in the first converter gas tank, an inlet electric butterfly valve is at least arranged on an inlet pipeline of the second converter gas tank, an outlet electric butterfly valve is at least arranged on an outlet pipeline of the second converter gas tank, a piston position detection device is at least arranged in the second converter gas tank, and a control device is used for controlling the opening or closing of the inlet electric butterfly valve according to signals output by the piston position detection device of the first converter gas tank and the piston position detection device of the second converter gas tank so that the first converter gas tank or the second converter gas tank is in an on-line state.
Inventors
- WANG SIJIA
- XU QINGYU
- LONG ZHIFENG
Assignees
- 中冶华天工程技术有限公司
Dates
- Publication Date
- 20260508
- Application Date
- 20260130
Claims (9)
- 1. The control system for the online switching of the double-converter gas tanks is characterized by comprising a first converter gas tank, a second converter gas tank, a front gas recovery main pipe, a rear gas recovery main pipe and a control device, wherein the first converter gas tank and the second converter gas tank are connected between the front gas recovery main pipe and the rear gas recovery main pipe in parallel; at least an inlet electric butterfly valve is arranged on an inlet pipeline of the first converter gas tank, and at least an outlet electric butterfly valve is arranged on an outlet pipeline of the first converter gas tank; at least a piston position detection device is arranged in the first converter gas tank; The second converter gas cabinet inlet pipeline is at least provided with an inlet electric butterfly valve, and the second converter gas cabinet outlet pipeline is at least provided with an outlet electric butterfly valve; And the control device is used for controlling the opening or closing of the inlet electric butterfly valve according to signals output by the piston position detection device of the first converter gas tank and the piston position detection device of the second converter gas tank so as to enable the first converter gas tank or the second converter gas tank to be in an on-line state.
- 2. The control system for online switching of double converter gas tanks according to claim 1, wherein an inlet electric blind plate valve and an inlet pneumatic quick-cut valve are further arranged on an inlet pipeline of the first converter gas tank, and an outlet pneumatic quick-cut valve and an outlet electric blind plate valve are arranged on an outlet pipeline of the first converter gas tank.
- 3. The control system for online switching of double converter gas tanks according to claim 1, wherein an inlet electric blind plate valve and an inlet pneumatic quick-cutting valve are further arranged on an inlet pipeline of the second converter gas tank, and an outlet pneumatic quick-cutting valve and an outlet electric blind plate valve are arranged on an outlet pipeline of the second converter gas tank.
- 4. The control system for on-line switching of double-converter gas tanks according to claim 1, wherein a piston speed detection device, a piston inclination detection device, a piston drift detection device and a piston upper fixed type CO alarm detection device are further arranged in the first converter gas tank.
- 5. The control system for online switching of double-converter gas tanks according to claim 1, wherein a piston speed detection device, a piston inclination detection device, a piston drift detection device and a piston upper fixed type CO alarm detection device are further arranged in the second converter gas tank.
- 6. The control system for online switching of double converter gas tanks according to claim 1, wherein an oxygen content analyzer, a gas temperature detection device and a gas pressure detection device are arranged on a gas recovery main pipe in front of the tank.
- 7. The control system for on-line switching of double converter gas tanks according to claim 1, wherein an oxygen content analyzer is arranged on the gas main after the tank.
- 8. The control system for on-line switching of double converter gas tanks according to claim 1, wherein a converter gas electric dust removing device and a converter gas pressurizing station are sequentially arranged at the outlet of the rear gas recovery main pipe of the upper tank of the rear gas main pipe.
- 9. The control method for online switching of double converter gas tanks is characterized by comprising the following steps of: Monitoring whether the current cabinet capacity of the current online converter gas cabinet can meet the uninterrupted external gas supply of the pressurizing machine in one smelting period in real time, and keeping that the current online converter gas cabinet capacity is not smaller than the low-level cabinet capacity interlocking value under the condition that only gas is discharged and no gas is charged after one smelting period; If the gas is recovered, the electric butterfly valve at the outlet of the current off-line converter gas holder is closed, and then the electric butterfly valve at the inlet of the current off-line converter gas holder is opened, so that the gas enters the current off-line converter gas holder to recover the gas in a smelting period.
Description
Control system and method for online switching of double converter gas tanks Technical Field The invention relates to a control system and a method for online switching of a double-converter gas tank. Background The converter gas tank mainly solves the contradiction between intermittent production of converter steelmaking and continuous use of a converter gas user, and in order to ensure that the converter gas is fully recycled and utilized during the overhaul of the converter gas tank, a plurality of steel enterprises are provided with two converter gas tanks in parallel. Two operation modes of two converter gas tanks arranged in parallel are two, namely, the two gas tanks are operated in a combined mode, the two gas tanks are required to be on line at the same time under the condition, the two gas tanks are used as a main tank and an auxiliary tank to be operated respectively, and the two gas tanks are required to be switched under the condition. The Chinese patent CN202210136345.4 proposes an automatic control method of a converter gas recovery double-gas-tank system, which aims at the problems of frequent operation of operators caused by unbalance of gas recovery amounts of two gas tanks and unbalance of operation of the gas tank capacity and a gas pressurizing machine, and provides an automatic control method for simultaneous recovery of the converter gas tanks. On the premise that all interlocking devices of a gas tank, a gas electric dust collector and a gas pressurizing machine are normal and equipment is intrinsically safe, according to the operation parameters of the earlier-stage equipment, the balance of the recovered gas amounts of the two gas tanks is ensured by adjusting the opening of a regulating valve on a gas inlet pipeline of the gas tank of the converter, and meanwhile, the rotating speed of the pressurizing machine is adjusted so that the gas tank is kept at a middle position as far as possible, thereby avoiding the situation that the recovery is refused due to the high capacity of the gas tank and the gas pressurizing machine is stopped due to the excessively low capacity of the gas tank. The patent is mainly directed to an automatic control method of a system when two gas tanks are recovered simultaneously. The Chinese patent CN202022964395.0 proposes a double-cabinet parallel switching system for recovering converter gas, which aims at the transformation of two mutually independent converter gas recovery, purification and dust removal systems, and realizes the switching from the simultaneous recovery of the converter gas from two converter gas cabinets to the recovery of the converter gas from one converter gas cabinet by adding a valve and a communicating pipe in front of the gas cabinets, so that one of the gas cabinets can withdraw from the system at any time, the continuous supply of the gas is ensured, and the phenomenon of gas bleeding caused by overhaul of the gas cabinets is avoided. The patent is mainly aimed at an automatic control method of a system when two gas tanks are simultaneously recycled and switched to only one converter gas tank. The above patent is mainly aimed at a control method of a system when two gas tanks are operated in a combined mode, the two gas tanks are used as a main tank and an auxiliary tank to operate respectively, and when the main tank and the auxiliary tank are mutually switched, how to realize on-line switching is not reported in the prior patent. Disclosure of Invention In order to solve the problems, the invention provides a control system and a control method for online switching of a double-converter gas tank. In order to achieve the purpose, the control system for online switching of the double converter gas tanks comprises a first converter gas tank, a second converter gas tank, a front gas recovery main pipe, a rear gas recovery main pipe and a control device, wherein the first converter gas tank and the second converter gas tank are connected between the front gas recovery main pipe and the rear gas recovery main pipe in parallel, the rear gas recovery main pipe is connected with converter gas for electric dust removal, and then connected with a converter gas pressurizing station for purification and pressurization and then is conveyed to a user; at least an inlet electric butterfly valve is arranged on an inlet pipeline of the first converter gas tank, and at least an outlet electric butterfly valve is arranged on an outlet pipeline of the first converter gas tank; at least a piston position detection device is arranged in the first converter gas tank; The second converter gas cabinet inlet pipeline is at least provided with an inlet electric butterfly valve, and the second converter gas cabinet outlet pipeline is at least provided with an outlet electric butterfly valve; And the control device is used for controlling the opening or closing of the inlet electric butterfly valve according to signals output by the piston position dete