KR100896633B1 - Pulverlizer of hard coal for manufacturing pulverlizer coal - Google Patents

Abstract

The present invention relates to a crushing device for the production of pulverized coal anthracite, in particular, a large amount of coal in the anthracite coal is dried in a hopper without passing through a crusher, and transported to a bag filter, thereby suppressing the vibration of the pulverized coal crusher and related equipment The present invention relates to a crushing apparatus of semi-anthracite coal for producing pulverized coal,

The present invention is a coal hopper 10 for storing the anthracite coal containing lump coal and powdered coal, a coal storage hopper 20 for storing coal transported by the conveyor belt 12 from the coal hopper 10, the coal storage Pulverized coal is transferred from the hopper 20 to the coal filter 30 for controlling the amount of coal supplied from the hopper 20, the crusher 40 for crushing the coal supplied by the feeder 30, and the crusher 40 to the bag filter 50. In the crushing device of pulverized coal anthracite for pulverized coal, which is applied to pulverized coal production equipment including a pulverized coal transfer line 40L, an air air suction tower 70, and a hot air blast furnace 80, the weight of the coal hopper 10 and A coal feeder control means for detecting the weight of the coal storage hopper 20 and controlling the coal feeder 30 according to the powdered coal conveyed to the bag filter 50 corresponding to the deviation of the two weights; At the outlet of the coal storage hopper 20, a powder feed line 20L connected to the bag filter 50 is installed, and the temperature of the powder feed line 20L is detected. Powdered and dry control means for controlling the hot air supply to the coal storage hopper 20 in accordance with the deviation; And controlling the hot air outlet side valve of the coal storage hopper 20 when the conveyor belt 12 is run, and controlling the outlet air valve 23 when controlling the hot air inlet side valve of the coal storage hopper 20. Conveying and pressure control means; The gist is provided.

Pulverized Coal, Semi-Anthracite, Coal, Coal, Coal Storage Hopper, Temperature, Pressure

Description

Pulverizer of Pulverized Coal for Pulverized Coal Manufacture {PULVERLIZER OF HARD COAL FOR MANUFACTURING PULVERLIZER COAL}

1 is a diagram illustrating a conventional coal crushing operation process.

Figure 2 is a block diagram of a crushing device of the anthracite coal for pulverized coal production according to the present invention.

3 is a flowchart illustrating an operation of a crushing device of semi-anthracite coal for producing pulverized coal of the present invention.

Explanation of symbols on the main parts of the drawings

10: suntan hopper 11: load cell

11a: first weight converter (mv / I) 12: conveyor belt (Conveyor Belt)

12s: Conveyor Belt Run Switch 20: Coal Storage Hopper (R / H; Raw Coal Hoppr)

20L: coal feed line 21: ultrasonic weighing scale

21a: second weight converter (mv / I) 22: coal storage hopper inlet tube

23: outlet shutoff valve 24: first outlet temperature detector

24a: PID outlet temperature controller 24b: outlet temperature setter

24c: outlet temperature converter 25: coal weight calculator

26: hot air suction fan (Fan) 26a: hot air control valve

26b: Hot air flow detector 26c: Coal storage hopper pressure controller                 

27: hot air control valve 28: cold air control valve

29: hot air flow control calculator 30: coal feeder

31: Feed quantity controller 33: Coal weight / feed quantity converter

40: Coal crusher (Mill) 40L: Pulverized coal transportation line (Line)

41: second outlet temperature detector 41a: shredder outlet temperature controller

50: Bag Filter 50a: Bag Filter Atmospheric Discharge Valve

51: Pulverized coal storage hopper (S / H; Storage Hopper)

52: Pulverized coal injection hopper (F / H; Feed Hopper)

60: BF (Blast Furnace) 70: Atmospheric air suction tower

70L: Cold air line 70v: Cold air shutoff valve

71: cold air control valve 72: cold air operator

80: Hot Stove 80L: Hot Stove Line

80v: Hot air shutoff valve 81: Hot air control valve

82: hot air flow calculator 84: hot air flow detector

74a: hot air flow controller 90L: integrated line

The present invention relates to a crushing device of the anthracite coal for pulverized coal, in particular, a large amount of coal in the anthracite coal is dried in a hopper without passing through a crusher and transported to a bag filter, thereby suppressing the vibration of the pulverized coal crusher and related facilities In addition, by controlling the amount of coal supplied in accordance with the weight of coal transported to the bag filter, it is possible to perform a stable coal control and management, thereby improving the amount of pulverized coal production, The present invention relates to a crushing device of the anthracite coal for pulverized coal production, which can prevent the pulverized coal injection interruption in advance.

In general, in the pulverized coal production facility, semi-anthracite coal (coal coal + powder coal) is transported from the coal hopper 10 to the conveyor belt 12 and stored in the coal storage hopper 20 and then coal is rotated by the rotation of the feeder 30. It is cut out and crushed by the lower crusher 40 to be made of pulverized coal. In this case, it is transported after drying by hot air, stored in the pulverized coal storage hopper 51 via the bag filter 50, and stable blowing into the blast furnace 60 is carried out by the blowing hopper 52.

Such a manufacturing facility has a capacity of about 20 to 40 Ton / Hr pulverized coal and the pulverized coal stock in the pulverized coal storage hopper 51 should be secured at all times because the pulverized coal is continuously blown into the blast furnace. When the driver sets the amount of coal supply in the coal supply amount setter 32, the coal supply signal is output to the coal feeder 30, and coal is fed into the crusher 40 by the feeder rotation speed to be crushed. do.

This is related to the anti-anthracite crushing control that manages such a supply of coal supply without supplying the crusher to the pulverized coal contained in a large amount of coal. In general, the anthracite coal contains about 30-50% of coal dust, and the vibration generated when crushing in the coal feeder generates about 30-40 ~.

FIG. 1 is a view illustrating a conventional coal crushing operation process. Referring to FIG. 1, the conventional anti-anthracite manufacturing process will be described. The semi-anthracite coal stored in the coal hopper 10 of the coal yard is stored in a conveyor belt 12. It is transported by and stored in the coal storage hopper 20, where the stored coal contains a large amount of coal dust, which is referred to as anthracite coal. In order to manufacture pulverized coal by crushing coal, when the driver outputs the set amount set in the coal supply amount setter 32 to the coal feeder 30, the coal feed amount is controlled by the rotation speed of the coal feeder and the lower crusher 40 is used. Coal is crushed by the coal, which is crushed by the rotation of the roll 40a, 40b inside the crusher 40 to produce pulverized coal. The pulverized coal produced through such a process is dried by water gas generated during combustion in the hot blast furnace 80 and then transported to the bag filter 50. The pulverized coal collected in the bag filter is stored in the bottom of coal dust. The hot air is stored in the hopper 51 and discharged to the atmosphere through the air discharge valve 50a.

At this time, the control of hot air flow rate and crusher exit temperature is very important because it affects fire prevention, facility protection, pulverized coal drying condition and so on. When the feed amount is set by the feed amount setter 32 of the feeder, the set signal is converted into a flow rate signal by the converter (feed amount / flow rate 84b) and then input to the set value SV of the hot air flow rate controller 84a. do. The output signal of the hot air flow rate controller 84a passes through the cold air operator 72 and the hot air operator 82 to operate the atmospheric air control valve 71 and the hot air control valve 81 to control the flow rate. At this time, the flow rate detection of the hot air supplied to the coal resistance hopper detects the flow rate in the hot air flow rate detector 84, and on-off (On-Off) the atmospheric air control valve 71 and the hot air control valve 81 when a flow rate deviation occurs. ) And stable flow control. Hot air and atmospheric air are continuously sucked through the hot air suction fan 83.

In addition, the outlet temperature control of the crusher 40 sets the outlet temperature in the outlet temperature controller 42 of the crusher 40 and detects the temperature in the outlet temperature detector 41, and outputs the output value according to the detected deviation of the temperature. The temperature is controlled by the air control valve 71 and the hot air control valve 81.

However, in the conventional facilities as described above, the powdered coal in the semi-anthracite coal fired from the coal storage hopper 20 to the crusher 40 by the operator's ignition amount setting does not approach the crusher inner rolls 40a and 40b without hot air. There is a problem that blown by the pulverized coal transport line 40L is transported to the bag filter 50, thereby increasing the frictional resistance of the crusher inner roll (40a, 40b), due to this frictional resistance There was a problem that the vibration is not only difficult to operate the normal equipment, but also causes a failure of the equipment, thereby making it impossible to manufacture pulverized coal.

The present invention has been made to solve the above problems, and an object of the present invention is to dry the pulverized coal contained in the anthracite coal without passing through the crusher, and transported to the bag filter to suppress the vibration of the pulverized coal crusher The present invention provides a crushing device for the anthracite coal for pulverized coal production that can protect related equipment.

In addition, another object of the present invention is to control the amount of coal supplied in accordance with the weight of coal transported to the bag filter, it is possible to perform a stable coal control and management, thereby improving the amount of pulverized coal production, due to the stable amount of fine coal An object of the present invention is to provide a crushing apparatus for the anthracite coal for pulverizing coal, which can prevent pulverization of pulverized coal.

As a technical means for achieving the above object of the present invention, the present invention is a coal hopper for storing the anthracite coal containing lump coal and powdered coal, coal storage hopper for storing the coal transported by the conveyor belt from the coal hopper, The coal storage hopper includes a coal feeder for controlling the supply of coal, a crusher for crushing the coal supplied by the coal feeder, a pulverized coal transfer line for transferring the pulverized coal from the crusher to the bag filter, an atmospheric air suction tower, and a hot stove. In the pulverized coal anthracite coal crushing apparatus applied to the pulverized coal production equipment, the weight of the coal hopper and the weight of the coal storage hopper are respectively detected, and the weight of coal is conveyed to the bag filter corresponding to the deviation of the two weights. Feeder control means for controlling the feeder; Install a coal feed line connected to the bag filter at the outlet of the coal storage hopper, detect the temperature of the coal feed line, and control the supply of hot air to the coal storage hopper in accordance with a deviation from the set temperature in advance to the detected temperature Powdered drying control stage; And a powdered coal transport and pressure control means for controlling the hot air inlet side valve of the coal storage hopper when the conveyor belt is run and the coal storage hopper is operated. Characterized in having a.

Hereinafter, with reference to the accompanying drawings, the crushing apparatus of the semi-anthracite coal for pulverized coal production according to the present invention will be described in detail the configuration and operation. In the drawings referred to in the present invention, components having substantially the same configuration and function will use the same reference numerals.

FIG. 2 is a block diagram of a crushing device of pulverized coal anthracite for producing pulverized coal according to the present invention. Referring to FIG. 2, a crusher of crushed coal anthracite for producing pulverized coal according to the present invention is a grenade hopper storing semi-anthracite coal including coal and coal (10), a coal storage hopper 20 for storing coal transferred from the coal hopper 10 by the conveyor belt 12, and a feeder 30 for controlling the amount of coal supplied from the coal storage hopper 20; A crusher 40 for crushing coal supplied by the feeder 30, a pulverized coal transfer line 40L for transferring pulverized coal from the crusher 40 to the bag filter 50, and an air suction tower 70 And it is applied to the pulverized coal production equipment including a hot stove (80).

The crushing device of the anthracite coal for pulverized coal production according to the present invention detects the weight of the coal hopper 10 and the weight of the coal storage hopper 20, respectively, and is carried to the bag filter 50 corresponding to the deviation of the two weights. The coal feeder control means for controlling the feeder 30 according to the weight, and the coal feed line 20L connected to the bag filter 50 at the outlet of the coal storage hopper 20, the coal feed line ( Powdered-drying control means for detecting a temperature of 20L) and controlling hot air supply to the coal storage hopper 20 in accordance with a deviation from a preset temperature at the detected temperature, and the runtime of the conveyor belt 12 and the coal. It includes a powdered coal transport and pressure control means for controlling the filter outlet side valve of the storage hopper 20, and the outlet shut-off valve 23 to control the hot air inlet-side valve of the coal storage hopper 20.

The feeder control means includes first weight detectors 11 and 11a for detecting the weight inside the coal hopper 10 and second weight detectors 21 and 21a for detecting the weight inside the coal storage hopper 20. ), A powdered coal weight calculator 25 for calculating a powdered coal weight corresponding to a deviation between the first weight of the first weight detector and the second weight of the second weight detector, and the powdered coal weight of the powdered coal weight calculator 25. The coal feed weight / feed coal amount converter 33 for converting the coal feed into the coal feed amount, the measured coal feed amount by the coal powder weight / feed coal amount converter 33, and the preset feed coal amount by the feed feed amount setter 32 set in advance And a feed amount controller 31 for controlling the operation of the feeder 30 based on the deviation from the.

The coal powder weight calculator 25 receives a first weight of the first weight detector as a non-inverting terminal, receives a second weight of the second weight detector as an inverting terminal, and is input through the two input terminals. It consists of an adder 25c which subtracts the 2nd weight from 1 weight, and provides the divided weight value corresponding to the difference.

The feed amount controller 31 receives the measured feed amount by the coal powder weight / feed amount converter 33 as an inverting terminal, and sets the feed amount supplied by the feed amount setter 32 in advance to the non-inverting terminal. And a subtractor 31c which subtracts the measured amount of supply coal from the set amount of coal supplied through the two input terminals and provides a feeder operation signal according to the deviation.

The coal dust drying control means includes first temperature detectors 24 and 24c for detecting the outlet temperature of the coal storage hopper 20, and the outlet temperature setter is set in advance with the detected temperature by the first temperature detector. And a PID controller 24a for performing PID control by inputting the set temperature by 24b, and extending from the air-air suction tower 70 and the cold air line 70L. It includes an extended hot air line 80L, and a hot air supply line including an integrated line 90L connected to the coal storage hopper 20 by integrating the cold air line 70L and the hot air line 80L into one line. do. And a hot air flow control valve including a cold air control valve 27 installed in the cold air line 70L, and a hot air control valve 28 installed in the hot air line 80L. And a hot air flow rate control calculator 29 for controlling the hot air flow rate control valve based on the output signal.

The PID controller 24a is provided with operational amplifiers 24h, 24f, and 24k and peripheral elements 24i which input the detected temperature by the first temperature detector and the set temperature by the outlet temperature setter 24b set in advance. And 24g and 24e to implement the proportional derivative and integrator, and perform PID (proportional calculus) control on the two inputs to provide a valve control signal to the hot air flow control operator 29. Here, since PID control is well known, a detailed description thereof will be omitted.

The powdered coal transport and pressure control means includes a conveyor belt run switch 12s, a powdered coal conveying line 20L connected to a bag filter 50 at an outlet of the coal storage hopper 20, and a powdered coal conveying line 20L. The outlet cutoff valve 23 provided, the open switch 23s of the outlet cutoff valve 23, the cold air cutoff valve 70V provided in the cold air line 70L, and the hot air cutoff installed in the hot air line 28. A hot air shutoff valve including a valve 80V, an operation signal is provided to the outlet shutoff valve 23 according to a signal of the conveyor belt run switch 12s, and an operation signal of the outlet shutoff valve 23 is input. A shut-off valve control circuit 1 for receiving an operation signal to the hot air shutoff valve, a hot air suction fan 26 installed in the integrated line 90L, and an integrated line 90L of the hot air supply line. A pressure detector 26b for detecting pressure, a pressure control valve 26a provided in the integrated line 90L, Depending on the detected pressure by the pressure detector (26b) it includes a pressure gauge for controlling (26c) for controlling said pressure control valve (26a).

The shut-off valve control circuit 1 is operated by the relay R1; 1b operated by the contact signal 1a of the conveyor belt run switch 12s and the A contact point 1c of the relay to operate the coal storage hopper. A timer T1 operated by a first solenoid valve SV1; 1d for controlling the outlet shutoff valve 23 of the engine and a limit contact signal 1e which is an open signal of the outlet shutoff valve 23 of the coal storage hopper; 1f), and the timer contact 1g is turned on after a predetermined time in accordance with the start of the timer, and the second contact point for controlling the cold air shutoff valve 70v and the hot air shutoff valve 80v is controlled by this on contact 1g signal. And a third solenoid valve.

The crushing device of the pulverized coal anthracite for producing pulverized coal further includes a flow rate control means, which includes a second temperature detector 41 for detecting an outlet temperature of the crusher 40, and the second temperature detector 41. A temperature controller 41a for providing a temperature control signal corresponding to the detected temperature by the sensor, a flow rate detector 84 installed in a cold air line connected to the crusher 40 at the air suction tower 70, and the amount of coal supply A feed amount-flow rate converter 84b for converting the flow rate setting value corresponding to the set amount of feed amount in accordance with the set amount of feed amount set in the setter 32; and a set value by the feed amount-flow rate converter 84b; The hot air flow rate controller 84a which provides a flow rate control signal in accordance with the deviation from the measured value by the flow rate detector 84, the flow rate control signal of the hot air flow rate controller 84a, and the temperature control of the temperature controller 41a. Cold air control bell according to signal Valve operation by the hot air control valve 81 in accordance with the cold air operation unit 72 for providing a valve operation signal to the 71, the flow rate control signal of the hot air flow controller 84a and the temperature control signal of the temperature controller 41a. And a hot wind operator 82 to provide the signal.

Operation of the preferred embodiment of the present invention configured as described above will be described in detail below based on the accompanying drawings.

First, referring to FIG. 2, the operation of the crushing apparatus of the anthracite coal for pulverized coal production according to the present invention will be described. The semi-anthracite coal (got coal + coal) transported from the coal hopper 10 to the conveyor belt 12 is a coal storage hopper. (20) The following operation is executed in order to feed through the inlet pipe 22 into the hopper and transfer the coal filter hopper 20 to the bag filter 50 without storing coal dust.

First, the coal dust conveyance and pressure control of the coal storage hopper 20 by the coal dust transfer and pressure control means of the present invention will be described. When the conveyor belt 12 is started, the run of the conveyor belt 12 will be described. (Run) The detection switch (Switch) 12s is turned on to input the contact signal 1a of the shutoff valve control circuit 1 to start the relay R1; 1b. The first solenoid valve SV1; 1d is driven by the contact A of the relay 1c according to the start of the relay, and the coal storage hopper outlet shutoff valve 23 is closed by the operation of the first solenoid valve. switch from open to open.

Further, when the limit contact signal 1e, which is an open signal of the outlet shutoff valve 23 of the coal storage hopper 20, is input into the shutoff valve control circuit 1, the timer T1; 1f is started and a fixed time from this time. After that, the timer contact 1g is turned on. The cold air shutoff valve 70v and the hot air shutoff valve 80v are opened by the on-contact signal (1g) of the timer, so that the hot air and the cold air by the atmospheric air suction tower 70 and the hot air path 80 are cold air. And suctioned into the coal storage hopper 20 through hot air lines 70L and 80L. At this time, the suction fan 26 installed at the front end of the coal storage hopper 20 to suck the hot air and cold air is sent to the coal storage hopper 20. Then, the pressure inside the coal storage hopper 20 is detected by the pressure detector 26b, input to the coal storage hopper pressure controller 26c, and pressure control is performed by the operation of the pressure control valve 26a.

For example, the coal anthracite coal transported by the conveyor belt 12 in the coal hopper 10 includes a large amount of powdered coal, and when the anti-anthracite coal is fed to the crusher 40 via the coal feeder 30. Since the powdered coal is blown by the hot stove 80 gas without passing through the crushing rolls 40a and 40b inside the crusher, the pulverized coal is transported to the pulverized coal transport line 40L and the bag filter 50, so that the crusher rolls 40a and 40b are used. The friction between the base and the base increases, causing a sudden vibration.

Such a conventional problem can be solved by the apparatus according to the present invention. When this is explained, the powdered coal is dried and the bag filter 50 is dried at the time when the anthracite coal is granulated from the conveyor belt 12 into the coal storage hopper 20. It is necessary to suppress the storage of powdered coal in the coal storage hopper 20 by carrying out a furnace. In order to obtain the hot air required for coal dust drying, branched from the hot gas furnace 80 exhaust gas line, the hot air line 80L is expanded, and the air control air line 70L for the temperature control is installed to install the flow control valves 27 and 28, respectively. do. In addition, the suction fan 26 is expanded to suck hot air into the coal storage hopper 20, and a pressure detector 26b and a pressure control valve 26a are installed to uniformly maintain the pressure in the coal storage hopper 20. Control.

Secondly, when the coal drying process by the coal dust drying control means of the present invention is described, since the anthracite coal incorporated in the coal storage hopper 20 contains moisture, constant temperature control is required to perform drying. The temperature is detected by the temperature detector 24 installed at the outlet of the coal storage hopper 20 and input to the input side 24j of the PID controller 24a, and the signal set by the temperature setter 24b is input 24d. In the instrument, PID control is performed by the operation of various devices 24e to 24k. The output value of the PID controller is inputted to the hot air flow control calculator 29 and processed to operate the hot air control valve 27 and the cold air control valve 28 to control the outlet temperature of the coal storage hopper 20 by hot air. It will dry the powdered coal. At this time, the hot air control valve and the cold air control valve calculation equation may be expressed as Equation 1 below.

Hot air control valve formula = (IN1 * X1)

Cold air control valve operation type = (IN1 * X2) reverse action

Here, IN1 is an input value of the hot air flow control operator 29, and X1 and X2 are constants set in advance.

In order to prevent the discharge of hot air to the coal inlet opening side by the internal pressure of the coal storage hopper 20 by producing a funnel-like end pipe 22 is installed in the coal piled state to prevent hot air discharge is prevented. .

As described above, the temperature detector 24 is installed at the outlet of the coal storage hopper 20 to detect the temperature of the hot air discharged and to perform stable temperature control in the PID controller 24a at the temperature set by the temperature setter 24b. do. In addition, since the moisture in the semi-anthracite coal granulated into the coal storage hopper 20 is different, the heat absorbed is also different. At this time, by controlling the outlet temperature by detecting the outlet temperature by operating the coal storage hopper hot air control valve 27 and the coal storage hopper cold air control valve 28 it is possible to dry the coal dust.

As described above, after the coal dust in the anthracite coal granulated in the conveyor belt 12 into the coal storage hopper 20 is dried by hot air, the coal storage hopper 20 is not supplied to the lower coal feeder 20 and the crusher 40. In this case, the outlet shutoff valve 23 and the coal feed line 20L are transported to the bag filter to prevent vibrations in the crusher caused by the supply of coal in the crusher 40, thereby managing equipment (abrasion prevention). It is an invention that is greatly helpful in stabilization of pulverized coal through equipment trouble prevention.

Third, the process of the coal supply control by the coal supply control means of the present invention is a weight detector of the coal hopper 10 in order to detect the weight of the coal powder dried and transported by hot air in the coal storage hopper 20. The load cell 11 detects the weight and inputs the weight to the weight converter 11a, and then converts the weight into the hopper weight calculator 25, the input side 25b, and detects the weight of the coal storage hopper 20. The weight is detected using the ultrasonic gravimetric 21 installed in the. The weight detected through this process is converted into the weight in the weight converter 21a and then input to the input side 25a of the powdered coal weight calculator 25. In addition, the weight signal of the coal hopper 10 inputted to the hopper weight calculator 25 and the weight signal of the coal storage hopper 20 are processed to know the weight difference, and the converted weight is included in the coal coal. It is to be a coal dust. The calculated weight is converted by the coal powder weight / mass feed amount converter 33, and then inputted to the input side 31a by the coal feed amount controller 31, except for the weight 31b set by the coal feed amount setter 32. The coal is crushed by outputting to the feeder (30).

3 is a flowchart illustrating an operation of the crushing device of the anthracite coal for pulverized coal production according to the present invention. Referring to FIG. 3, the operation flow of the present invention will be briefly described once again. When the anthracite coal is transported into the coal storage hopper (20), the coal storage hopper (R / H; Raw Coal Hopper) exit blocking valve is opened (101), and the cold air blocking valve (28) is used to suck the hot air and cold air. The hot air shutoff valve 27 is also switched from the waste to the dog. (102) At this time, the suction fan 103 is activated to dry the coal dust in the semi-anthracite coal in which hot air is sucked into the coal storage hopper 20 and granulated. The pressure control 105 and the outlet temperature control 104 in the coal storage hopper 20 are executed simultaneously to stably dry and transport the powdered coal. In addition, the weight of the coal hopper 10 and the weight of the coal storage hopper 20 are detected (106, 107) at the same time as the conveyor belt operation 100, and the weight calculation process 108 is performed to calculate the weight of coal powder. The set amount 109 and the calculation process 110 are performed again to calculate the set amount of the feed amount.

According to the present invention as described above, the powdered coal in the anthracite coal granulated from the conveyor belt 12 to the coal storage hopper 20 is dried by hot air and then not supplied to the lower feeder 20 and the crusher 40. By transporting the outlet shutoff valve 23 and the powdered coal transfer line 20L from the coal storage hopper 20 to the bag filter 50 without vibration, the occurrence of vibration in the crusher due to the supply of powdered coal in the crusher 40 is prevented. The weight of the powdered coal is computed and detected, and the coal supply control is performed in terms of the coal supply amount. In addition, by supplying only the lump coal of the rolls 40a and 40b in the shredder 40, it is possible to greatly improve the facility management (abrasion prevention of the shredder), prevention of facility troubles, and the like, and greatly assist in stabilization of pulverized coal.

According to the present invention as described above, by transporting a large amount of powdered coal contained in the anthracite coal in the hopper without passing through the crusher, and transported to the bag filter, it is possible to protect the relevant equipment by suppressing the vibration of the pulverized coal crusher By controlling the amount of coal supplied according to the weight of coal transported to the bag filter, stable coal control and management can be performed, thereby improving the production of pulverized coal, and preventing pulverized coal injection in advance due to the stabilization of pulverized coal. It can work.

That is, after the coal dust in the anthracite coal granulated in the conveyor belt 12 into the coal storage hopper 20 is dried by hot air, the coal storage hopper 20 is not supplied to the lower coal feeder 20 and the crusher 40. The outlet block valve 23 and the coal feed line 20L are transported to the bag filter 50 to block the supply of powdered coal in the crusher 40 and to supply only the coal briquettes to the rolls 40a and 40b in the crusher 40. As a result, facility management (abrasion prevention of crushers), facility trouble prevention, and securing a high amount of pulverized coal are effective. In addition, by detecting and calculating the weights of the coal hopper 10 and the coal storage hopper 20, the powdered coal weight in the semi-anthracite coal detected is calculated again, and converted into the amount of coal supply to set the coal supply. It is an invention that greatly contributes to blast furnace operation, which has the effect of reducing cost and increasing charter production by stabilizing the injection of pulverized coal in the blast furnace by securing pulverized coal inventory.

The above description is only a description of specific embodiments of the present invention, and the present invention is not limited to these specific embodiments, and various changes and modifications of the configuration are possible from the above-described specific embodiments of the present invention. It will be apparent to those skilled in the art to which the present invention pertains.

Claims (5)

Coal hopper (10) for storing the anthracite coal containing coal and powdered coal, coal storage hopper (20) for storing the coal transported from the coal hopper 10 by the conveyor belt (12), this coal storage hopper (20) Pulverized coal for conveying pulverized coal to the bag filter 50 from the crusher 40 for crushing the coal supplied by the feeder 30, the crusher 40 for adjusting the coal supply amount from the crusher 40, and the bag filter 50. In the crushing device of pulverized coal anthracite for pulverized coal, which is applied to pulverized coal manufacturing equipment including a transfer line (40L), an air suction tower (70), and a hot stove (80), The weight of the coal hopper 10 and the weight of the coal storage hopper 20 are respectively detected, and the feeder 30 is controlled according to the powdered coal conveyed to the bag filter 50 corresponding to the deviation of the two weights. A coal feeder control means; At the outlet of the coal storage hopper 20, a powder feed line 20L connected to the bag filter 50 is installed, and the temperature of the powder feed line 20L is detected. Powdered and dry control means for controlling the hot air supply to the coal storage hopper 20 in accordance with the deviation; And When the conveyor belt 12 is run, the pulverized air outlet valve of the coal storage hopper 20 is controlled, and the outlet shutoff valve 23 is carried out to control the hot air inlet side valve of the coal storage hopper 20. And pressure control means; Crushing device of the anthracite coal for pulverized coal production, characterized in that it comprises a. The method of claim 1, wherein the feeder control means First weight detectors (11, 11a) for detecting the weight inside the coal hopper (10); Second weight detectors 21 and 21a for detecting the weight of the coal storage hopper 20. A powdered weight calculator (25) for calculating a powdered powder corresponding to a deviation between the first weight of the first weight detector and the second weight of the second weight detector; A powdered coal weight / feed coal amount converter 33 for converting the powdered coal weight of the coal powder weight calculator 25 into the amount of coal feed; The operation of the feeder 30 is controlled based on the deviation between the measured feedstock amount by the powdered coal weight / feedstock amount converter 33 and the preset feedstock amount by the feedstock quantity setting device 32 set in advance. The coal feed amount controller 31; the crushing device of the anthracite coal for pulverized coal production, characterized in that it comprises a. The method of claim 1, wherein the coal drying control means First temperature detectors 24 and 24c for detecting an outlet temperature of the coal storage hopper 20; A PID controller (24a) for performing PID control by inputting the detected temperature by the first temperature detector and the preset temperature by the preset outlet temperature setter (24b); The cold air line 70L extending from the atmospheric air suction tower 70, the hot air line 80L extending from the hot air path 80, and the cold air line 70L and the hot air line 80L as one A hot air supply line integrated into a line and including an integrated line 90L connected to the coal storage hopper 20; A hot air flow control valve including a cold air control valve 27 installed in the cold air line 70L and a hot air control valve 28 installed in the hot air line 80L; And a hot air flow rate control calculator (29) for controlling the hot air flow rate control valve on the basis of an output signal of the PID controller (24a). The method of claim 1 or 3, wherein the coal dust transport and pressure control means Conveyor belt run switch 12s; A coal feed line 20L connected to the bag filter 50 at the outlet of the coal storage hopper 20; An outlet cutoff valve 23 installed at the coal feed line 20L; An open switch 23s of the outlet shutoff valve 23; A hot air cutoff valve including a cold air cutoff valve (70V) installed in the cold air line (70L) and a hot air cutoff valve (80V) installed in the hot air line (28); Blocking for providing an operation signal to the outlet shut-off valve 23 in accordance with the signal of the conveyor belt run switch 12s, receiving the operation signal of the outlet shut-off valve 23 to provide an operation signal to the hot air shut-off valve Valve control circuit 1; Hot air suction fan (Fan) (26) installed in the integration line (90L); A pressure detector 26b for detecting the pressure of the integrated line 90L of the hot air supply line; A pressure control valve 26a installed at the integration line 90L; A pressure control instrument (26c) for controlling the pressure control valve (26a) in accordance with the detected pressure by the pressure detector (26b); Shredding device for the anthracite coal for pulverized coal production, characterized in that it comprises a. According to claim 2, wherein the crushing device of the anthracite coal for pulverized coal production Further comprising a flow control means, This flow rate control means A second temperature detector (41) for detecting the outlet temperature of the crusher (40); A temperature controller (41a) for providing a temperature control signal corresponding to the detected temperature by the second temperature detector (41); A flow rate detector (84) installed in a cold air line connected to the crusher (40) in the air suction tower (70); A coal feed amount-flow rate converter (84b) for converting the flow rate setting value corresponding to the set coal supply amount according to the set coal supply amount set by the coal feed amount setter (32); A hot air flow rate controller (84a) for providing a flow rate control signal in accordance with a deviation between the flow rate set value by the feed rate-to-flow rate converter (84b) and the measured value by the flow rate detector (84); A cold air operator (72) for providing a valve operation signal to the cold air control valve (71) in accordance with the flow control signal of the hot air flow controller (84a) and the temperature control signal of the temperature controller (41a); And And a hot wind operator (82) for providing a valve operation signal to the hot wind control valve (81) according to the flow control signal of the hot air flow controller (84a) and the temperature control signal of the temperature controller (41a). Shredding device of semi-anthracite coal for pulverized coal production.

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