Blast furnace fan filter cartridge blowback pulse control device

Abstract

The utility model belongs to the technical field of dust remover control, and provides a blast furnace fan filter cartridge blowback pulse control device which comprises a pulse valve controller, a controller starting switch, a power switch, an intermediate relay and an electromagnetic valve, and the power switch is connected with a low-voltage single-phase 220V alternating-current power supply to supply power to the pulse valve controller and the electromagnetic valve. And the pulse valve controller is connected with the controller starting switch and the intermediate relay, and the intermediate relay is connected with the electromagnetic valve to realize blowback pulse control of the filter cartridge of the blast furnace fan. According to the device, the multi-point pulse controller is matched with the intermediate relay to expand the capacity and the number of contacts, the electromagnetic valve is controlled through the combination of the contacts of the intermediate relay to realize that each fan filter is timely cleaned by back flushing, the blast furnace fan filter cartridge filter is timely cleaned, the fault occurrence rate of the air blower is reduced, and the manual maintenance efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of dust collector control technology, and relates to the control of blast furnace blower filter cartridge pulse cleaning, specifically a blast furnace blower filter cartridge backflushing pulse control device. Background Technology

[0002] The high-efficiency filter cartridge backflushing at the breather inlet of the inlet chamber of the 1680m³ blast furnace BPRT blower uses an electromagnetic pulse valve. The electromagnetic pulse valve is directly driven by an electromagnetic pulse valve controller. After a period of operation, the output port of the microcontroller mainboard of the electromagnetic pulse valve controller fails, causing the filter cartridge backflushing device at the blower inlet to fail to start normally. This results in the inlet filter not being cleaned in time, leading to ash accumulation on the filter cartridge. Consequently, each maintenance requires manual removal of some filters in the chamber and forced blowing with a portable blower, extending maintenance time. If it is a cloudy day and the ash accumulation on the filter cartridge is severe, it can cause abnormal throat difference test data of the blower. When the blast furnace operates at low air volume, it can also easily cause "distortion" of the throat difference detection transmitter's monitoring signal data, potentially leading to mis-control of the anti-surge valve and causing "mis-ventilation" accidents in the blast furnace. Utility Model Content

[0003] The purpose of this invention is to provide a backflushing pulse control device for blast furnace blower filter cartridges, ensuring timely cleaning of the blast furnace blower filter cartridges, reducing the failure rate of the blower, and improving the efficiency of manual maintenance.

[0004] The solution adopted by this utility model to achieve the above objectives is as follows:

[0005] A blast furnace blower filter cartridge backflushing pulse control device includes a pulse valve controller, a controller start switch, a power switch, an intermediate relay, and a solenoid valve. The power switch is connected to a low-voltage single-phase 220V AC power supply to power the pulse valve controller and the solenoid valve. The pulse valve controller is connected to the controller start switch and the intermediate relay, and the intermediate relay is connected to the solenoid valve.

[0006] Furthermore, the pulse valve controller adopts a multi-point pulse controller for online backflushing of the single bag filter housing, and the intermediate relay coil is driven by the sequential control of the pulse controller's logic output points.

[0007] Furthermore, the controller's start switch has multiple switch modules connected in parallel, employing various triggering modes, including external signal command switches that are triggered by external initialization to start with a start pulse control command, and external manual trigger switches that are triggered by external manual initialization commands.

[0008] Furthermore, the switch module also includes a self-controlled interlocking differential pressure switch, which is installed in the main process gas pipeline. The self-controlled interlocking differential pressure switch automatically starts when the pressure is higher than -7.5kPa to -9kPa.

[0009] Furthermore, the controller start switch is set to external control selection switch, and the self-control interlock differential pressure switch is set to select automatic control time interval control.

[0010] Furthermore, the switch module also includes a normally open contact of the dry contact of the remote control receiver, which receives human intervention periodic trigger commands through the remote control receiver, and works with the learning-type 2-point remote control to realize remote control of the solenoid valve logic start and stop.

[0011] Furthermore, the pulse valve controller can set the pulse valve operating time, pulse interval time, and pulse cycle time.

[0012] Furthermore, the intermediate relay uses an RXM4AB2BD relay with a DYF14A base to expand the capacity and the number of contacts. The contacts are connected to the terminals of each solenoid valve, and the solenoid valve is controlled by the combination of intermediate relay contacts.

[0013] The beneficial effects of this utility model are: by using a multi-point pulse controller in conjunction with intermediate relays to expand the capacity and number of contacts, and by controlling the solenoid valves through the combination of intermediate relay contacts, the filters of each blower are back-blown and cleaned in a timely manner, ensuring that the filter cartridges of the blast furnace blowers are cleaned in a timely manner, reducing the failure rate of blowers, and improving the efficiency of manual maintenance. Attached Figure Description

[0014] Figure 1 This is a block diagram of the control principle of this utility model;

[0015] Figure 2 This is the main power supply control schematic diagram of this utility model;

[0016] Figure 3 This is a schematic diagram of the electrical control structure of the pulse valve controller of this utility model;

[0017] Figure 4 This is a schematic diagram of the solenoid valve pilot valve structure of this utility model;

[0018] In the diagram: 1. Pulse valve controller; 2. Controller start switch; 3. Power switch; 4. Intermediate relay; 5. Solenoid valve; 6. External signal command switch; 7. External manual trigger switch; 8. Self-control interlocking differential pressure switch; 9. Remote control receiver dry contact open contact. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings:

[0020] A blast furnace blower filter cartridge backflushing pulse control device, such as Figure 1As shown, the system includes a pulse valve controller 1, a controller start switch 2, a power switch 3, an intermediate relay 4, and a solenoid valve 5. Power switch 3 connects to a low-voltage single-phase 220V AC power supply to power the pulse valve controller 1 and the solenoid valve 5. The pulse valve controller 1 is connected to the controller start switch 2 and the intermediate relay 4, and the intermediate relay 4 is connected to the solenoid valve 5. The main power supply control principle is as follows: Figure 2 As shown.

[0021] Pulse valve controller 1 is a multi-point pulse controller used in online backflushing of a single bag filter dust collector. The pulse valve controller can set the pulse valve operating time, pulse interval time, and pulse cycle time. The 24V DC signal output from the pulse controller logic sequentially controls the driving of the intermediate relay 4 coil to execute pulse actions. One channel controls one relay coil. Figure 3 As shown, the electrical control structure of the 78-loop pulse valve controller is as follows: Intermediate relay 4 uses an RXM4AB2BD relay with a DYF14A base to expand capacity and the number of contacts. The contacts connect to the wiring terminals of the backflush solenoid valves of each blast furnace blower filter cartridge. The solenoid valves are controlled through the combination of intermediate relay contacts, including switching the intermediate relay layers by changing the position between the upper and lower housings, to achieve single-point electrical control. Figure 4 As shown; the pulse valve controller 1 has the control function to meet the 100-200ms trigger operation of the electromagnetic pulse control valve and the logical sequence time interval operation function control; the pulse valve controller 1 is directly installed in the distribution box, which is installed on site, thus reducing line faults.

[0022] The controller start switch 2 connects multiple switch modules in parallel, employing various triggering modes, including external signal command switch 6 which triggers the start pulse control command through external initialization, and external manual trigger switch 7 which triggers the start pulse control command through external manual initialization. It can also be equipped with a self-locking differential pressure switch 8, installed in the main process near-gas pipeline. The self-locking differential pressure switch 8 automatically activates when the pressure exceeds -7.5kPa to -9kPa. The controller start switch 2 can also be equipped with an external control selection switch to select the self-locking differential pressure switch, enabling automatic control over time intervals. The switch module may also include a remote control receiver dry contact open contact 9, receiving human intervention periodic trigger commands through the remote control receiver. This, combined with a learning-type 2-point remote control, enables remote control of the solenoid valve's logic start and stop.

Claims

1. A pulse control device for backflushing filter cartridges of a blast furnace blower, characterized in that: It includes a pulse valve controller, a controller start switch, a power switch, an intermediate relay, and a solenoid valve. The power switch is connected to a low-voltage single-phase 220V AC power supply to power the pulse valve controller and the solenoid valve. The pulse valve controller is connected to the controller start switch and the intermediate relay, and the intermediate relay is connected to the solenoid valve.

2. The blast furnace blower filter cartridge backflushing pulse control device according to claim 1, characterized in that: The pulse valve controller is a multi-point pulse controller used in the online backflushing of a single bag filter housing. The intermediate relay coil is driven by the sequential control of the output points of the pulse controller logic.

3. The blast furnace blower filter cartridge backflushing pulse control device according to claim 1, characterized in that: The controller has multiple switch modules connected in parallel and adopts various triggering modes, including external signal command switches that are triggered by external initialization to start the switch via an external pulse control command, and external manual trigger switches that are triggered by external manual initialization commands.

4. The blast furnace blower filter cartridge backflushing pulse control device according to claim 3, characterized in that: The switch module also includes a self-controlled interlocking differential pressure switch, which is installed in the main process gas pipeline. The self-controlled interlocking differential pressure switch automatically starts when the pressure is higher than -7.5kPa to -9kPa.

5. The blast furnace blower filter cartridge backflushing pulse control device according to claim 3, characterized in that: The controller's start switch is configured with an external control selection switch, and the self-control interlock differential pressure switch is configured with automatic control time interval control.

6. The blast furnace blower filter cartridge backflushing pulse control device according to claim 3, characterized in that: The switch module also includes a normally open contact of the dry contact of the remote control receiver, which receives human intervention periodic trigger commands through the remote control receiver, and works with the learning-type 2-point remote control to realize remote control of the solenoid valve logic start and stop.

7. The blast furnace blower filter cartridge backflushing pulse control device according to claim 1, characterized in that: The pulse valve controller can set the pulse valve working time, pulse interval time, and pulse cycle time.

8. The blast furnace blower filter cartridge backflushing pulse control device according to claim 1, characterized in that: The intermediate relay uses an RXM4AB2BD relay with a DYF14A base to expand the capacity and number of contacts. The contacts are connected to the terminals of each solenoid valve, and the solenoid valve is controlled by the combination of intermediate relay contacts.

Images