Submerged arc furnace centralized control system

Abstract

The utility model relates to the technical field of submerged arc furnace control systems, in particular to a submerged arc furnace centralized control system which comprises a plurality of submerged arc furnaces, a plurality of auxiliary devices, a controller and a server are arranged on each submerged arc furnace, digital display instruments are arranged on the auxiliary devices and connected with the controller, and the controller comprises a control module and a protection module. The control module comprises sub-modules arranged on all auxiliary devices, the protection module is connected with the digital display instrument, the real-time running state, the control state and the auxiliary device state of the submerged arc furnace are displayed on the server, and the server controls running of all the submerged arc furnaces in a unified mode. The beneficial effects of the utility model are that the operation state, the fault state and the operation control interface of each auxiliary device are displayed on the server, the state of the submerged arc furnace is visually understood, the submerged arc furnace is simultaneously controlled, the control module is used for adjusting and controlling each sub-module, the production is stabilized, and the misoperation risk is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of submerged arc furnace control systems, in particular to a submerged arc furnace centralized control system. Background Art

[0002] Submerged arc furnace, also known as electric arc furnace, is an industrial electric furnace with huge power consumption. It uses carbon as a reducing agent to reduce and smelt metal ores. It is mainly used to produce ferrosilicon, ferromanganese, ferrochrome, ferrotungsten, silicon-manganese alloy and other ferroalloys. It is an important equipment commonly used in the metallurgical industry. Its working characteristics are that it uses carbon or magnesium refractory materials as furnace lining, uses self-training electrodes, and inserts the electrodes into the charge for submerged arc operation. It uses the energy of the arc and the energy generated by the resistance of the charge when the current passes through the charge to melt the metal. It adds materials one after another and taps iron slag intermittently. The production process is continuous operation. Submerged arc furnace is mainly composed of furnace, electrode, short net, water cooling system, air cooling system, smoke exhaust system, loading and unloading system, transformer and capacitor of submerged arc furnace and other electrical equipment.

[0003] Usually, when an ore-fired furnace is in operation, it is necessary to control various auxiliary equipment and check the operation status of each auxiliary equipment. If local control or remote independent control is adopted, it is very inconvenient for workers to operate, and there is no unified plan. Once an emergency occurs, the relevant parameters cannot be adjusted in time and effectively, which poses a safety hazard. At the same time, some equipment is manually operated, which is complicated and prone to errors. Therefore, it is necessary to unify the control of these auxiliary equipment and multiple ore-fired furnaces to quickly and intuitively observe the operation status of each equipment and improve production efficiency. Utility Model Content

[0004] In order to solve the problems existing in the prior art, the utility model provides a centralized control system for an electric arc furnace, which avoids the problems of separate control of multiple electric arc furnaces, potential safety hazards and low production efficiency.

[0005] To solve the above problems, the technical solution of the utility model is as follows:

[0006] A centralized control system for an ore-heating furnace, comprising a plurality of ore-heating furnaces, each of which is provided with a plurality of auxiliary equipment, and also comprising a controller connected to the ore-heating furnaces and used for centralized control of the ore-heating furnaces, the controller being connected to a server, a digital display instrument for monitoring operating parameters of the auxiliary equipment being provided on the auxiliary equipment, the digital display instrument being connected to the controller, the controller comprising a control module and a protection module, the control module comprising a submodule provided on each auxiliary equipment, the protection module being connected to the digital display instrument, the real-time operating status, control status, and auxiliary equipment status of the ore-heating furnace being displayed on the server, and the operation of each ore-heating furnace being uniformly controlled by the server;

[0007] The auxiliary equipment includes transformers, capacitors, hydraulic stations, air coolers, and electrodes.

[0008] Furthermore, the submodule includes:

[0009] Transformer submodule, the transformer submodule sends control signals for transformer on / off and gear adjustment to the control module;

[0010] The capacitor submodule sends a control signal for opening and closing the capacitor and adjusting the size of the capacitor to the control module;

[0011] The hydraulic station submodule sends a control signal for opening and closing the hydraulic station to the control module;

[0012] The air cooling machine submodule sends the control signal of air cooling machine start and stop and temperature adjustment to the control module;

[0013] The electrode submodule sends control signals for electrode lifting, electrode pressing and releasing, and electrode inversion to the control module.

[0014] Furthermore, the digital display instrument comprises:

[0015] Transformer digital display instrument, which measures the operating voltage, current, active power, reactive power and power factor of the transformer and sends the measured parameters to the controller;

[0016] Capacitor digital display instrument: The capacitor digital display instrument measures the operating voltage and current of the capacitor and sends the measurement parameters to the controller;

[0017] Digital instrument of hydraulic station: the digital instrument of hydraulic station measures the pressure of hydraulic station and sends the measured parameters to the controller;

[0018] Air cooler digital instrument: The air cooler digital instrument measures the wind speed and temperature of the air cooler and sends the measured parameters to the controller.

[0019] Furthermore, the protection module includes:

[0020] Transformer protection module sets safety value and compares it with the real-time data of transformer digital display instrument, and issues warning if it exceeds or is too low;

[0021] Capacitor protection module sets a safety value and compares it with the real-time data of the capacitor digital display instrument, and issues an early warning if it exceeds or is too low;

[0022] The hydraulic station protection module sets a safety value and compares it with the real-time data of the hydraulic station digital display instrument. If it exceeds or is too low, an early warning will be issued;

[0023] The air cooler protection module sets a safety value and compares it with the real-time data of the air cooler digital display instrument. If it exceeds or is too low, an early warning will be issued;

[0024] The electrode protection module sets a safety value and compares it with the real-time data of the electrode digital display instrument, and issues an early warning if it exceeds or is too low.

[0025] Furthermore, the auxiliary equipment also includes a cooling water circulation device for reducing the temperature of the submerged arc furnace.

[0026] Furthermore, the digital display instrument also includes a cooling water digital display instrument arranged on the cooling water circulation device, and the cooling water digital display instrument sends a water cut-off signal to the server.

[0027] Furthermore, the controller is a PLC controller.

[0028] Furthermore, the server is an industrial computer.

[0029] Compared with the prior art, the utility model has the following beneficial effects: using PLC to centrally control the signals of various auxiliary equipment, and then uniformly uploading them to the server, displaying the operating status, fault status, and operation control interface of each auxiliary equipment on the server, intuitively understanding the status of the ore-heating furnace, and uniformly controlling the ore-heating furnace; setting a digital display instrument to obtain real-time operating data of the ore-heating furnace, and based on these data, using the control module to adjust and control each sub-module, stabilizing production and reducing the risk of misoperation. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is the operation block diagram of the utility model. DETAILED DESCRIPTION

[0031] like Figure 1 As shown, a centralized control system for an ore-heating furnace comprises a plurality of ore-heating furnaces, each of which is provided with a plurality of auxiliary equipment, and also comprises a controller connected to the ore-heating furnaces and used for centralized control of the ore-heating furnaces. The controller may adopt a PLC controller, and the controller is connected with a server. The server may adopt an industrial computer with a display screen. A digital display instrument for monitoring operating parameters of the auxiliary equipment is provided on the auxiliary equipment, and the digital display instrument is connected with the controller. The controller comprises a control module and a protection module. The control module comprises a submodule provided on each auxiliary equipment. The protection module is connected with the digital display instrument. The real-time operating status, control status, and auxiliary equipment status of the ore-heating furnace are displayed on the server, and the operation of each ore-heating furnace is uniformly controlled by the server.

[0032] Auxiliary equipment includes transformers, capacitors, hydraulic stations, air coolers, and electrodes.

[0033] Submodules include:

[0034] Transformer submodule, the transformer submodule sends the control signal of transformer opening and closing and gear adjustment to the control module, and the controller then sends the control signal to the server, and displays the control on the display operation control interface;

[0035] The capacitor submodule sends a control signal for opening and closing the capacitor and adjusting the size to the control module, and the controller then sends the control signal to the server, and displays the control on the display operation control interface;

[0036] The hydraulic station submodule sends the control signal of the hydraulic station opening and closing to the control module, and the controller then sends the control signal to the server, and displays the control on the display operation control interface;

[0037] The air cooler submodule sends the control signal of air cooler on / off and temperature adjustment to the control module, and the controller sends the control signal to the server, and the control is displayed on the display operation control interface;

[0038] The electrode submodule sends control signals for electrode lifting, electrode pressing and releasing, and inverting to the control module, and the controller then sends the control signal to the server, and displays the control on the display operation control interface.

[0039] Digital instruments include:

[0040] Transformer digital display instrument, which measures the operating voltage, current, active power, reactive power and power factor of the transformer and sends the measured parameters to the controller;

[0041] Capacitor digital display instrument: The capacitor digital display instrument measures the operating voltage and current of the capacitor and sends the measurement parameters to the controller;

[0042] Digital instrument of hydraulic station: the digital instrument of hydraulic station measures the pressure of hydraulic station and sends the measured parameters to the controller;

[0043] Air cooler digital instrument: The air cooler digital instrument measures the wind speed and temperature of the air cooler and sends the measured parameters to the controller.

[0044] The protection module includes:

[0045] Transformer protection module sets safety value and compares it with the real-time data of transformer digital display instrument, and issues warning if it exceeds or is too low;

[0046] Capacitor protection module sets a safety value and compares it with the real-time data of the capacitor digital display instrument, and issues an early warning if it exceeds or is too low;

[0047] The hydraulic station protection module sets a safety value and compares it with the real-time data of the hydraulic station digital display instrument. If it exceeds or is too low, an early warning will be issued;

[0048] The air cooler protection module sets a safety value and compares it with the real-time data of the air cooler digital display instrument. If it exceeds or is too low, an early warning will be issued;

[0049] The electrode protection module sets a safety value and compares it with the real-time data of the electrode digital display instrument, and issues an early warning if it exceeds or is too low.

[0050] The auxiliary equipment also includes a cooling water circulation device for reducing the temperature of the submerged arc furnace.

[0051] The digital display instrument also includes a cooling water digital display instrument arranged on the cooling water circulation device, and the cooling water digital display instrument sends a water cut-off signal to the server.

[0052] This system integrates the overall status of all auxiliary equipment into one server, which is convenient for workers to operate in a centralized manner. The operation interface is simple and can display the real-time operating status of the submerged arc furnace. It can also adjust the operating parameters according to the real-time data, stabilize production, and reduce the risk of misoperation.

[0053] The above specific implementation methods are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to examples, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A centralized control system for an ore-fired furnace, comprising a plurality of ore-fired furnaces, each of which is provided with a plurality of auxiliary equipment, characterized in that: It also includes a controller connected to the ore-heating furnace for centrally controlling the ore-heating furnace, the controller is connected to a server, a digital display instrument for monitoring operating parameters of the auxiliary equipment is provided on the auxiliary equipment, the digital display instrument is connected to the controller, the controller includes a control module and a protection module, the control module includes a submodule provided on each auxiliary equipment, the protection module is connected to the digital display instrument, the real-time operating status, control status, and auxiliary equipment status of the ore-heating furnace are displayed on the server, and the operation of each ore-heating furnace is uniformly controlled by the server; The auxiliary equipment includes transformers, capacitors, hydraulic stations, air coolers, and electrodes.

2. The centralized control system of a submerged arc furnace according to claim 1, characterized in that: The submodules include: Transformer submodule, the transformer submodule sends control signals for transformer on / off and gear adjustment to the control module; The capacitor submodule sends a control signal for opening and closing the capacitor and adjusting the size of the capacitor to the control module; The hydraulic station submodule sends a control signal for opening and closing the hydraulic station to the control module; The air cooling machine submodule sends the control signal of air cooling machine start and stop and temperature adjustment to the control module; The electrode submodule sends control signals for electrode lifting, electrode pressing and releasing, and electrode inversion to the control module.

3. A centralized control system for an electric arc furnace according to claim 2, characterized in that: The digital display instrument comprises: Transformer digital display instrument, which measures the operating voltage, current, active power, reactive power and power factor of the transformer and sends the measured parameters to the controller; Capacitor digital display instrument: The capacitor digital display instrument measures the operating voltage and current of the capacitor and sends the measurement parameters to the controller; Digital instrument of hydraulic station: the digital instrument of hydraulic station measures the pressure of hydraulic station and sends the measured parameters to the controller; Air cooler digital instrument: The air cooler digital instrument measures the wind speed and temperature of the air cooler and sends the measured parameters to the controller.

4. A centralized control system for an electric arc furnace according to claim 3, characterized in that: The protection module comprises: Transformer protection module sets safety value and compares it with the real-time data of transformer digital display instrument, and issues warning if it exceeds or is too low; Capacitor protection module sets a safety value and compares it with the real-time data of the capacitor digital display instrument, and issues an early warning if it exceeds or is too low; The hydraulic station protection module sets a safety value and compares it with the real-time data of the hydraulic station digital display instrument. If it exceeds or is too low, an early warning will be issued; The air cooler protection module sets a safety value and compares it with the real-time data of the air cooler digital display instrument. If it exceeds or is too low, an early warning will be issued; The electrode protection module sets a safety value and compares it with the real-time data of the electrode digital display instrument, and issues an early warning if it exceeds or is too low.

5. A centralized control system for an electric arc furnace according to claim 4, characterized in that: The auxiliary equipment also includes a cooling water circulation device for reducing the temperature of the ore-fired furnace.

6. A centralized control system for an electric arc furnace according to claim 5, characterized in that: The digital display instrument also includes a cooling water digital display instrument arranged on the cooling water circulation device, and the cooling water digital display instrument sends a water cut-off signal to the server.

7. The centralized control system of a submerged arc furnace according to claim 1, characterized in that: The controller is a PLC controller.

8. The centralized control system of a submerged arc furnace according to claim 1, characterized in that: The server is an industrial computer.

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