Automatic dust removal and cooling device in pellet bulk material collection of circular cooler

Abstract

The utility model relates to an automatic dedusting and cooling device in pellet bulk material collection of a circular cooler. The device is composed of a discharging unit, an air inlet pipeline, a dust removal pipeline, a detection sensor and an electric control unit. The device has the automatic dust removal and cooling functions of the pellet bulk materials, can reduce environmental pollution caused by flying dust of the pellet bulk materials, avoids the accident that high-temperature pellets hurt people, can protect the environment, and can improve the production safety.

Description

Technical Field

[0001] The utility model belongs to the technical field of bulk material collection of annular coolers for iron ore pellets, and in particular relates to an automatic dust removal and cooling device for collecting bulk material of annular coolers for pellets. Background Art

[0002] The finished pellets produced by the rotary kiln-grate system are in the state of high-temperature red balls. The process requires that they enter the ring cooler for cooling before being transported to the ironmaking plant. Due to the limitations of the structural characteristics of the ring cooler, a small amount of pellets will fall from the ring cooler during the cooling process of the high-temperature pellets and become pellet bulk materials. These bulk materials will automatically roll into the bulk material collection bin at the bottom of the ring cooler. On-site production workers will regularly open the discharge valve at the bottom of the bulk material collection bin to discharge the bulk materials into the transport cart and transport them away. Since the pellet bulk materials contain debris and dust, dust pollution will be generated during the unloading of the bulk materials into the cart, and there may be uncooled high-temperature red balls.

[0003] In order to avoid environmental pollution and prevent workers from being scalded by red balls, automatic dust removal and cooling devices for bulk materials are particularly necessary. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides an automatic dust removal and cooling device for collecting bulk pellets of an annular cooler.

[0005] The utility model discloses an automatic dust removal and cooling device for collecting pellet bulk materials in an annular cooler, comprising a pellet bulk material collecting bin and an electric control unit, and is characterized in that it also comprises a discharge unit,

[0006] Air inlet duct, dust removal fan, dust removal duct and detection sensor assembly.

[0007] The unloading unit includes a unloading bin, an electric flap valve for the collection bin installed on the upper part of the unloading bin, an electric flap valve for the unloading bin installed on the lower part of the unloading bin, and a lower hopper installed on the lower part of the unloading bin. The upper part of the unloading bin is connected to the lower part of the pellet bulk material collection bin through a flange and bolts, and the lower part of the unloading bin is connected to the upper part of the lower hopper through a flange and bolts. The left side of the unloading bin is connected to the dust removal pipeline through a flange and bolts, and an air inlet is provided on the right side of the unloading bin, and an air outlet is provided on the left side of the unloading bin; the air inlet pipeline is connected to the air inlet arranged on the right side of the unloading bin through a flange and bolts, and a damper actuator is installed at the inlet of the air inlet pipeline; one end of the dust removal pipeline is connected to the air outlet on the left side of the unloading bin, and the other end is connected to the dust removal fan;

[0008] The detection sensor assembly includes a collection bin rotary resistance material level meter arranged on the upper part of the pellet bulk collection bin, a discharge bin rotary resistance material level meter arranged on the lower part of the discharge bin, a pressure transmitter arranged on the air inlet pipeline, and a temperature transmitter arranged on the dust removal pipeline;

[0009] The collecting bin electric flap valve, the discharging bin electric flap valve, the damper actuator, the dust removal fan, the collecting bin rotary resistance level meter, the discharging bin rotary resistance level meter, the pressure transmitter and the temperature transmitter are all electrically connected to the electronic control unit.

[0010] Preferably, the electric control unit comprises an electric control box, in which a PLC controller, an analog output module, an analog input module and a digital input and output module are arranged; the analog output module, the analog input module and the digital input and output module are connected to the PLC controller via a data bus; a discharge buzzer, a fault indicator light and a discharge button are provided on the control panel of the electric control box; the discharge buzzer, the fault indicator light and the output port of the digital input and output module are connected via wires; the discharge button and the input port of the digital input and output module are connected via wires; the opening of the damper actuator The feedback port is connected to the analog input module through a wire, the damper actuator opening setting port is connected to the analog output module through a wire, the collecting bin rotary resistance level meter and the unloading bin rotary resistance level meter are respectively connected to the digital input port of the digital input and output module through a wire, the pressure transmitter and the temperature transmitter are respectively connected to the analog input module through a wire, the collecting bin electric flap valve and the unloading bin electric flap valve are respectively connected to the output port of the digital input and output module through a wire, and the start and stop signal input port of the dust removal fan is connected to the output port of the digital input and output module.

[0011] The utility model has the advantages that the device has the automatic dust removal and cooling functions of the pellet bulk material, which can reduce the environmental pollution caused by the dust of the pellet bulk material.

[0012] The beneficial effects of the utility model are:

[0013] (1) In the utility model, the dust removal and cooling operations of the pellet bulk material are carried out in a closed unloading bin, which will not generate secondary dust, reduce the environmental pollution caused by the pellet bulk dust, and avoid the occurrence of high-temperature pellet injury accidents, thereby protecting the environment and improving production safety.

[0014] (2) In the present invention, the PLC controller can monitor the negative pressure of the dust removal duct through the pressure transmitter and the working status of the monitoring system. The PLC controller can control the opening of the damper actuator and adjust the negative pressure of the dust removal duct to prevent the pelletized bulk material from being sucked into the dust collector.

[0015] (3) In the present invention, the PLC controller can monitor the temperature of the dust removal pipeline, thereby monitoring the temperature of the pellet bulk material. When the dust removal time and temperature meet the standards, the dust removal fan can be turned off to save electricity.

[0016] (4) In the present invention, an automated control method is adopted, which can automatically remind workers to perform unloading operations, thereby reducing labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The schematic diagram of the structure is an automatic dust removal and cooling device for collecting bulk pellets in a ring cooler.

[0018] Figure 2 This is a structural diagram of the unloading bin.

[0019] Figure 3 for Figure 2 Side view of.

[0020] Figure 4 for Figure 3 Top view of the .

[0021] Figure 5 This is the block diagram of the electronic control unit. DETAILED DESCRIPTION Example

[0022] This embodiment provides an automatic dust removal and cooling device for collecting bulk pellets in an annular cooler, as shown in FIG.

[0023] As shown in 1 to 4, the device includes a pellet bulk material collection bin 1 and an electronic control unit, and is characterized in that it also includes a discharge unit, an air inlet pipeline, a dust removal fan, a dust removal pipeline and a detection sensor assembly.

[0024] The unloading unit includes a unloading bin 2, an electric flap valve 2-1 for the collecting bin installed at the upper part of the unloading bin 2, an electric flap valve 2-2 for the unloading bin installed at the lower part of the unloading bin 2, and a lower hopper 6 installed at the lower part of the unloading bin 2. The upper part of the unloading bin 2 is connected to the lower part of the pellet bulk material collecting bin 1 through a flange and bolts, the lower part of the unloading bin 2 is connected to the upper part of the lower hopper 6 through a flange and bolts, the left side of the unloading bin 2 is connected to the dust removal pipeline 5 through a flange and bolts, an air inlet is provided on the right side of the unloading bin 2, and an air outlet is provided on the left side of the unloading bin 2;

[0025] The air inlet pipeline 3 is connected to the air inlet arranged on the right side of the discharge bin 2 through a flange and bolts, and a damper actuator 4 is installed at the inlet of the air inlet pipeline 3;

[0026] One end of the dust removal pipeline 5 is connected to the air outlet on the left side of the unloading bin 2, and the other end is connected to the dust removal fan 7;

[0027] The detection sensor assembly includes a collection bin rotary resistance level meter 8 arranged on the upper part of the pellet bulk collection bin 1, a discharge bin rotary resistance level meter 9 arranged on the lower part of the discharge bin 2, a pressure transmitter 10 arranged on the air inlet pipeline and a temperature transmitter 11 arranged on the dust removal pipeline.

[0028] The collecting bin electric flap valve 2-1, the discharging bin electric flap valve 2-2, the damper actuator 4, the dust removal fan 7, the collecting bin rotary resistance level meter 8, the discharging bin rotary resistance level meter 9, the pressure transmitter 10 and the temperature transmitter 11 are all electrically connected to the electronic control unit.

[0029] The electric control unit includes an electric control box 12, inside which a PLC controller 12-4, an analog output module 12-5, an analog input module 12-6 and a digital input and output module 12-7 are arranged. The analog output module 12-5, the analog input module 12-6 and the digital input and output module 12-7 are connected to the PLC controller 12-4 via a data bus. A discharge buzzer 12-1, a fault indicator light 12-2 and a discharge button 12-3 are provided on the control panel of the electric control box 12. The unloading buzzer 12-1 and the fault indicator light 12-2 are connected to the output port of the digital input and output module 12-7 through wires, the unloading button 12-3 is connected to the input port of the digital input and output module 12-7 through wires, the opening feedback port of the damper actuator 4 is connected to the analog input module 12-6 through a wire, the opening setting port of the damper actuator is connected to the analog output module 12-5 through a wire, the upper rotary resistance level meter 8 and the lower rotary resistance level meter 9 are connected to the digital input port of the digital input and output module 12-7 through wires, respectively, the pressure transmitter 10 and the temperature transmitter 11 are connected to the analog input module 12-6 through wires, respectively, the electric flap valve 2-1 and the electric flap valve 2-2 are connected to the output port of the digital input and output module 12-7 through wires, respectively, and the start and stop signal input port of the dust removal fan 7 is connected to the output port of the digital input and output module 12-7.

[0030] In the utility model, the model of the PLC controller 12-4 can be selected as Siemens 200Smart, order number: 6ES7 288-1SR20-0AA0, the order number of the analog output module 12-5 can be selected as: 6ES7 288-3AQ04-0AA0, and the order number of the analog input module 12-6 can be selected as: 6ES7 288-3AE04-0AA0. The order number of the digital input and output module 12-7 can be selected as: 6ES7 288-2DR32-0AA0. The optional model of the pressure transmitter 10 is the Jule 3051 differential pressure transmitter, the output signal is 4-20mA, and the range is -2~0Kpa. The temperature transmitter 11 can be selected as an integrated PT100 temperature transmitter, the output signal is 4-20mA, and the range is 0-200℃. The damper actuator can be selected from Ouma, 4-20mA control signal, diameter DN300. The dust removal fan can be selected from centrifugal fan, wind pressure 3KPa, and other electrical components can be selected from Chint brand.

[0031] The working principle of the dust removal and cooling function of the pellet bulk material using the utility model in the embodiment is as follows:

[0032] The flap valve 2-1 is in the manually closed state, the flap valve 2-2 is in the manually opened state, the discharge bin 2 is in the empty state, the electric control unit is powered on and starts working; the PLC controller 12-4 makes the damper actuator 4 in the closed state, and the dust removal fan 7 is in the stopped state. The pelletized bulk material produced on the ring cooler falls into the bulk material collection bin 1.

[0033] When the height of the pellet bulk exceeds the height of the collecting bin rotary resistance level meter 8, the PLC controller 12-4 opens the collecting bin flap valve 2-1, and the pellet bulk begins to enter the discharge bin 2. At the same time, the PLC controller 12-4 starts the dust removal fan 7, and the device enters the dust removal and cooling state. The PLC controller 12-4 calculates the opening of the actuator 4 once per second through the built-in PID control algorithm, and sends the opening setting value to the actuator 4 through the analog output module 12-5, and opens the actuator to the calculated opening, thereby controlling the negative pressure of the air inlet duct 3 at -0.5Kpa, and the cooling air enters the discharge bin 2 from the damper actuator 4, and then is sent to the dust collector by the dust removal fan 7. At this time, the cooling air will take away the dust and heat in the pellet bulk, achieving the purpose of dust removal and cooling. When the pellet level in the discharge bin 2 is higher than the discharge bin rotary resistance level meter 9, the PLC controller 12-4 closes the collection bin flap valve 2-1, and the dust removal fan continues to work for 3 minutes, and then determines whether the wind temperature detected by the temperature transmitter 11 is higher than 60°C; if it is higher than 60°C, the dust removal fan 7 continues to work until the wind temperature is lower than 60°C and the fan stops working.

[0034] After the dust removal fan 7 stops working, the PLC controller 12-4 sets the opening of the damper actuator 4 to 0, turns on the buzzer 12-1, and notifies the on-site operator to perform the unloading operation. The on-site operator can open the unloading bin flap valve 2-2 through the unloading button 12-3 on the electric control box 12 to perform the unloading action.

[0035] When the opening time of the flap valve 2-2 of the discharge bin is greater than 50 seconds, the PLC controller 12-4 automatically closes the flap valve 2-2. Then, the PLC controller 12-4 performs the operation of step (2) again, and the cycle continues.

[0036] (5) In the overheating fault state of the dust removal fan 7, the valve opening and closing signals of the collection bin flap valve 2-1 and the discharge bin flap valve 2-2 can be detected through the corresponding input port of the digital input and output module 12-7. When the PLC controller 12-4 detects that the dust removal fan 7 is overheated and the flap valves 2-1 and 2-2 are not fully opened or closed as instructed, the PLC controller 12-4 will generate a fault signal. When the dust removal fan 7 of this device is in operation, the design index controls the negative pressure of the air inlet duct 3 to -0.5Kpa to effectively suck the dust in the pelletized bulk into the dust collector. If the pressure of the pressure transmitter 10 detected by the analog input module 12-6 is greater than -0.4Kpa after the dust removal fan 7 has been running for 20S, the PLC controller 12-4 will also generate a fault signal. When the fault signal is generated, the PLC controller 12-4 turns on the buzzer 12-1 and the fault indicator 12-2 to notify the operator to handle the equipment fault.

[0037] In addition to the above embodiments, the present invention may also have other implementations, and any technical solutions obtained by equivalent replacement or equivalent transformation shall fall within the protection scope of the present invention.

Claims

1. An automatic dust removal and cooling device for collecting pellet bulk materials in an annular cooler, comprising a pellet bulk material collection bin and an electronic control unit, characterized in that: It also includes a discharge unit, an air inlet pipeline, a dust removal fan, a dust removal pipeline and a detection sensor assembly. The unloading unit includes a unloading bin, an electric flap valve for the collection bin installed at the upper part of the unloading bin, an electric flap valve for the unloading bin installed at the lower part of the unloading bin, and a lower hopper installed at the lower part of the unloading bin. The upper part of the unloading bin is connected to the lower part of the pellet bulk material collection bin through a flange and bolts, the lower part of the unloading bin is connected to the upper part of the lower hopper through a flange and bolts, the left side of the unloading bin is connected to the dust removal pipeline through a flange and bolts, an air inlet is provided on the right side of the unloading bin, and an air outlet is provided on the left side of the unloading bin. The air inlet pipeline is connected to the air inlet arranged on the right side of the discharge bin through a flange and bolts, and a damper actuator is installed at the inlet of the air inlet pipeline; One end of the dust removal pipeline is connected to the air outlet on the left side of the unloading bin, and the other end is connected to the dust removal fan; The detection sensor assembly includes a collection bin rotary resistance material level meter arranged on the upper part of the pellet bulk collection bin, a discharge bin rotary resistance material level meter arranged on the lower part of the discharge bin, a pressure transmitter arranged on the air inlet pipeline, and a temperature transmitter arranged on the dust removal pipeline; The collecting bin electric flap valve, the discharging bin electric flap valve, the damper actuator, the dust removal fan, the collecting bin rotary resistance level meter, the discharging bin rotary resistance level meter, the pressure transmitter and the temperature transmitter are all electrically connected to the electronic control unit.

2. The automatic dust removal and cooling device for collecting bulk pellets in annular cooler according to claim 1 is characterized in that: The electric control unit comprises an electric control box, in which a PLC controller, an analog output module, an analog input module and a digital input output module are arranged. The analog output module, analog input module and digital input output module are connected to the PLC controller via a data bus. A discharge buzzer, a fault indicator light and a discharge button are arranged on the control panel of the electric control box. The unloading buzzer and fault indicator light are connected to the output port of the digital input and output module through wires, the input port of the unloading button digital input and output module is connected through wires, the opening feedback port of the damper actuator is connected to the analog input module through wires, the opening setting port of the damper actuator is connected to the analog output module through wires, the collecting bin rotary resistance level meter and the unloading bin rotary resistance level meter are respectively connected to the digital input port of the digital input and output module through wires, the pressure transmitter and the temperature transmitter are respectively connected to the analog input module through wires, the collecting bin electric flap valve and the unloading bin electric flap valve are respectively connected to the output port of the digital input and output module through wires, and the start and stop signal input port of the dust removal fan is connected to the output port of the digital input and output module.

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