Novel automatic starting system applied to standby blast furnace blower

Abstract

The utility model belongs to the technical field of blast furnace blower application equipment, and relates to a novel automatic starting system applied to a standby blast furnace blower, which comprises an operation cabinet, the operation cabinet is connected to a blower motor through a management cable, the operation cabinet is connected to a frequency converter through an operation cable, and the frequency converter is electrically connected with a starting cabinet. A signal line of the starting cabinet is connected with the frequency converter, a control line of the frequency converter is connected with the operation cabinet, the frequency converter is connected to the control cabinet, a DCS and a background computer are arranged in the control cabinet, the DCS is electrically connected with the background computer, a starting relay K1 is arranged in the DCS, the control cabinet is connected with the fan protector, and a fault relay K2 is arranged in the fan protector. The air blower protection device starts the standby air blower set after the air blower protection device breaks down and jumps in operation, the time for starting the standby air blower is short, and the influence on blast furnace smelting is reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of blast furnace blower application equipment, specifically relating to a novel automatic start-up system for standby blast furnace blowers. Background Technology

[0002] Blast furnace blowers are crucial core power equipment in the blast furnace smelting process. Their function is to provide a continuous, stable, and sufficient amount of air to the blast furnace, ensuring the normal operation of fuel combustion and smelting reactions. In actual production in steel enterprises, a "one-to-one" air supply mode is commonly used, meaning one blast furnace is equipped with one main operating blower. If the main operating blower experiences an unplanned shutdown due to electrical faults, mechanical failures, or protection activation, the blast furnace will face the risk of air shortage.

[0003] A blast furnace blowout is a very serious production accident. It can cause a sudden drop in furnace pressure, turbulent airflow, accumulation of unburned coal powder, and a decrease in furnace temperature. It can even lead to slag buildup in the tuyeres and freezing of the hearth, severely affecting the smelting process and the quality of the molten iron, causing huge economic losses, damaging the blast furnace itself, and threatening production safety. Therefore, when the main blower fails, the backup blower must be started immediately to restore air supply to the blast furnace in the shortest possible time and minimize losses.

[0004] Existing backup blower startup technology has the following main drawbacks:

[0005] 1. Long start-up time and significant impact on blast furnace smelting: Currently, the start-up of standby blowers generally relies on manual operation. When the main blower trips, operators need to detect the alarm, confirm the fault, rush to the standby blower site, and perform a series of complex start-up operations. The manual operation steps are cumbersome and time-consuming. The start-up delay will significantly extend the time window for the blast furnace to operate without air, greatly increasing the risk of furnace condition deterioration, leading to loss of molten iron production, decline in quality, and even damage to the blast furnace itself.

[0006] 2. High requirements for personnel skills and operational risks: The emergency start-up operation of the standby blower is complex and technically demanding. It needs to be completed quickly and accurately under enormous production pressure. Moreover, manual operation inevitably involves individual differences and reaction time differences, making it difficult to guarantee that the optimal speed and reliability can be achieved every time.

[0007] Therefore, a novel automatic start-up system for standby blast furnace blowers is proposed. Utility Model Content

[0008] The purpose of this utility model is to provide a novel automatic start-up system for standby blast furnace blowers, which has the function of automatically starting standby blast furnace blowers. This solves the problems of long start-up time of standby blowers, significant impact on blast furnace smelting, high requirements for personnel skills, and operational risks in the existing technology.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model provides a novel automatic start-up system for standby blast furnace blowers, including an operation cabinet. The operation cabinet is connected to the blower motor via a management cable and to a frequency converter via a running cable. The frequency converter is electrically connected to the start-up cabinet. The signal line of the start-up cabinet is connected to the frequency converter. The control line of the frequency converter is connected to the operation cabinet. The frequency converter is connected to a control cabinet. A start-up relay K1 is installed in the control cabinet. The control cabinet is connected to a blower protector. A fault relay K2 is installed in the blower protector.

[0010] Preferably, the control cabinet is equipped with a DCS and a back-end computer, the DCS is electrically connected to the back-end computer, and a start relay K1 is installed in the DCS.

[0011] Preferably, the fan protector is connected to the control cabinet via a status signal line, and the fault relay K2 is connected to the status signal line.

[0012] Preferably, a communication link is also included between the control cabinet and the main fan control system.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0014] 1. This utility model enables the protection device of the operating blower to start the standby blower unit after a failure trip, and the start-up time of the standby blower is short, reducing the impact on blast furnace smelting;

[0015] 2. This utility model has an automatic start function for the backup blast furnace blower, which solves the problems of long start-up time of the backup blower in the prior art, which has a great impact on blast furnace smelting and requires high personnel skills, thus posing operational risks. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a structural diagram of a novel automatic start-up system for a standby blast furnace blower, according to one embodiment.

[0018] In the diagram above, 1. Operation cabinet, 2. Management cable, 3. Blower motor, 4. Operation cable 4, 5. Frequency converter, 6. Starter cabinet, 7. Control cabinet, 8. DCS, 9. Back-end computer, 10. Fan protector, 11. Signal line, 12. Control line, 13. Status signal line, 14. Communication link. Detailed Implementation

[0019] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0020] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0021] Example 1, as Figure 1 As shown, a novel automatic start-up system for standby blast furnace blowers includes an operation cabinet 1. The operation cabinet 1 is connected to the blower motor 3 via a management cable 2. The operation cabinet 1 acts as the motor control hub, directly controlling the start / stop and operating mode of the blower motor 3 through the management cable 2. The operation cabinet 1 automatically switches power modes, avoiding delays caused by manual operation. The operation cabinet 1 is connected to a frequency converter 5 via an operation cable 4. The frequency converter 5 is electrically connected to a starter cabinet 6. The frequency converter 5 receives the start command from the control cabinet 7 and outputs power to the operation cabinet 1, gradually increasing the voltage and frequency according to a preset curve. Soft start prevents the motor and power grid from being subjected to large current surges, extending equipment lifespan, and starts according to the optimal curve, shortening acceleration time.

[0022] Signal line 11 of starter cabinet 6 connects to inverter 5. Starter cabinet 6 is ready to start, preventing accidental operation and automatically completing steps that traditionally require manual inspection. Control line 12 of inverter 5 connects to operation cabinet 1. Inverter 5 is connected to control cabinet 7. Control cabinet 7 contains a start relay K1. Control cabinet 7 processes main fan fault signals and adjusts the standby fan status. When the main fan fails, start relay K1 is automatically activated, sending a start command to inverter 5. Control cabinet 7 is connected to fan protector 10. Fan protector 10 contains a fault relay K2. When the main fan malfunctions, fan protector 10 triggers fault relay K2, transmitting an alarm signal to control cabinet 7.

[0023] The specific design of the aforementioned key components will be discussed in detail below:

[0024] The control cabinet 7 houses a DCS8 and a back-end computer 9. The DCS8 is electrically connected to the back-end computer 9, and a start relay K1 is installed within the DCS8. The DCS8 integrates the start relay K1, and the normally open switch of the start relay K1 is embedded in the DO card of the DCS8 hardware module. The back-end computer 9 displays the start-up curve and fault records in real time, allowing engineers to modify start-up parameters, including the frequency ramp-up rate and overcurrent protection threshold. The fan protector 10 is connected to the control cabinet 7 via a status signal line 13, and a fault relay K2 is connected to the status signal line 13.

[0025] It also includes a communication link 14 connecting the control cabinet 7 and the main fan control system. The communication link 14 is a fiber optic ring network or an industrial Ethernet.

[0026] Operating Principle: The fault signal from the fan protector 10 is transmitted to the start signal from DCS8 to the frequency converter 5. When a fault occurs, the fault relay K2 activates, and its normally open contact immediately closes, sending a start signal to control cabinet 7 to automatically initiate the standby fan start-up procedure. Starter cabinet 6 closes to supply power to frequency converter 5, which then outputs power at a certain frequency. The blower motor 3 is energized and begins to run. Frequency converter 5 begins to increase the frequency. After the blower motor 3 reaches its rated speed and starts running, frequency converter 5 issues a command to run cabinet 1 to close. Once run cabinet 1 closes, the startup is complete.

[0027] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0028] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A novel automatic start-up system for a stand-by blast furnace blower, characterized in that, The system includes an operation cabinet, which is connected to the blower motor via a management cable. The operation cabinet is also connected to the frequency converter via a running cable. The frequency converter is electrically connected to the starter cabinet. The signal line of the starter cabinet is connected to the frequency converter. The control line of the frequency converter is connected to the operation cabinet. The frequency converter is connected to the control cabinet. The control cabinet is equipped with a starter relay K1. The control cabinet is connected to a fan protector. The fan protector is equipped with a fault relay K2.

2. A novel automatic start-up system for a back-up blast furnace blower as claimed in claim 1, wherein, The control cabinet contains a DCS and a back-end computer. The DCS is electrically connected to the back-end computer, and a start relay K1 is installed in the DCS.

3. A novel automatic start-up system for stand-by blast furnace blowers as claimed in claim 1, wherein, The fan protector is connected to the control cabinet via a status signal line, and the fault relay K2 is connected to the status signal line.

4. A novel automatic start-up system for a back-up blast furnace blower as claimed in claim 1, wherein, It also includes the communication link connecting the control cabinet and the main fan control system.

Images