KR19990017159U - Grinding penetrating device of gravity dust collector cone for blast furnace - Google Patents

Abstract

The present invention relates to a gravity dust collector that removes the dust contained in the gas during the operation of the furnace, the discharge pipe 11 is installed in the lower portion of the cone portion 110, the discharge pipe 11 side by side first and second automatic blocking Valves 12 and 13 are provided, and the integrated tank 16 is provided on the pipe line between the first and second shut-off automatic valves 12 and 13 with the in-flow valve 15 interposed therebetween. At the outlet side of the 16, an automatic discharge valve 17 and a rotary valve 18 are installed, and at the same time, a pipeline of the rotary valve 18 is connected to a discharge line 120; On the side of the second shut-off automatic valve 13, a housing 22 in which the excavating screw 21 is incorporated is installed, and an upper pressure detector 23 and a nitrogen purge control valve 24 are respectively provided on the upper surface of the housing 22. Are installed in communication with each other, and a driven shaft 26 is installed on the rear surface of the drilling screw 21 through a bearing 25, and a screw rod spirally moving along the operating direction in the driven shaft 26 ( 27) is installed, the rear end of the screw rod 26, the excavation portion is attached to the forward and backward detection rod 28; A motor driving part geared to the driven gear 31 having a plurality of gear trains formed on the outer circumferential surface of the driven shaft 25 and driven through an operating motor 34; Consists of a control unit 40 for opening and closing the various valves by mutually controlling the valves in response to the dust discharge unit and the excavation unit and the motor driving unit, as well as to reduce the work load by manual operation and to prevent iron cracks or gas leakage Therefore, to prevent the disaster in advance.

Description

A device for drilling and piercing of a dust catcher cone of a blast furnace

The present invention relates to a gravity dust collector for removing the dust contained in the gas during the operation of the furnace, in particular, crushing through the gravity dust collector cone for the furnace that can easily remove dust stuck in the gravity collector during the normal operation of the furnace Relates to a device.

In general, the gas dust collector is a device for removing the dust contained in the gas during the operation of the furnace to reuse as a fuel, such a gas dust collector includes a gravity dust collector (dry vibration damper) and a scrubber (wet scrubber).

Here, the gravity dust collector is a device for dust removal using the weight of the dust, is temporarily stored in the cone (cone) provided in the lower portion is to be cut out when necessary and reused as fuel.

That is, the conventional gravity precipitator capable of performing the above function, as shown in the schematic diagram of Figure 1, the lower portion of the gravity precipitator 100 is provided with a cone portion 110 that is stacked with dust falling, this cone portion The lower portion of the 110 is provided with a discharge line 120 used as a passage for storing the stored dust, the discharge line 120 is a discharge valve 130 for opening and closing the discharge port and the gas sealing valve for blowing the gas 140 and a control valve 150 for controlling the discharge of dust is installed, the end of the discharge line 120, the pug mill operated by the drive motor 160 to transfer the dust discharged ( 170) is installed.

Therefore, the dust that is filled in the cone portion 110 is to fall to the pug mill 170 through the discharge line 120 when opening the discharge valve 130.

However, during the repair or regular repair of the furnace, the gravity precipitator 100 is cleaned with a steam purge. In this process, a large amount of steam condensed water flows into the cone part 110 and the internal dust is fixed. Let's go.

In addition, since the limestone component in the dust further prevents the discharge line 120 while promoting adhesion, the discharge of the dust becomes impossible.

Therefore, in order to pierce the discharge line 120 by hitting the body of the cone portion 110 with a hammer or the like to pulverize the deposits by the vibration of the iron or blow the nitrogen gas in the open state of the gas sealing valve 140 Will be used.

However, the method of hitting the hammer using the hammer is a manual work by manpower, which not only causes an increase in physical load, but also repeatedly impacts the cone part, so that cracks or holes are generated in the metal shell and the worker is addicted to gas. There was a problem that could be.

In addition, when the penetrating operation using the hammer or the like is impossible, dust accumulation efficiency decreases due to the increase in dust accumulation of the gravity precipitator and blows to the post process, resulting in operation failure of the subsequent equipment as well. The problem was that all operations had to be stopped and then penetrated.

In addition, since the dust or gas is suddenly ejected by the internal pressure at the moment when the discharge line 120 is penetrated, there is a risk of gas poisoning and the environment may be contaminated by excessive dust scattering.

Therefore, the present invention is devised to solve the problems as described above, and provides a pulverization penetrating device of the gravity precipitator cone for the blast furnace that can penetrate through the dust fixed in the gravity precipitator during the normal operation of the blast furnace. Its purpose is to.

The present invention for achieving the above object, the lower portion of the gravitational dust collector is provided with a cone portion is stacked while the dust is falling, the lower portion of the cone portion is provided with a discharge line used as a passage for discharged stored dust, The discharge line is provided with a discharge valve for opening and closing the discharge port, a gas sealing valve for blowing gas and a control valve for controlling the discharge of dust, and at the end of the discharge line, a driving motor to transfer the discharged dust In the dust discharge device of the gravity precipitator having a structure connected to the pug mill operated by a, the discharge side having a diameter of a predetermined size along the horizontal direction is installed on the lower side of the cone portion, the discharge pipe 1, 2nd automatic shutoff valve is installed, and on the pipe line between the 1st and 2nd automatic shutoff valve, a vent automatic valve is installed on the upper side. An integrated tank is installed to the lower side with an inlet copper valve interposed therebetween, and an outlet automatic valve and a rotary valve are installed at the outlet side of the integrated tank, and a pipe line of the rotary valve is connected to the discharge line, and the body of the integrated tank has a lower side and an upper side. A dust discharge part provided with first and second level detection switches respectively; On the side of the second shut-off automatic valve is installed a housing with a built-in excavation screw along the horizontal direction, the upper surface of the housing is installed in communication with the internal pressure detector and the nitrogen purge control valve, respectively, bearing on the back of the excavation screw A driven shaft having a female thread is installed through this, and a screw rod for spirally moving along the operating direction is installed in the driven shaft. A rear end forward and backward detection rod is attached to the rear end of the screw rod. The movement path of the rod is an excavation portion is installed with a limit switch to detect the movement amount of the screw rod; A driven gear having a plurality of gear trains is installed on the outer circumferential surface of the driven shaft, and the driven gear is gear-coupled to operate the driven gear, and this main gear has an operating motor installed in the housing via a coupling. A motor driving part connected to the motor; In response to a signal of the dust discharge part, the excavation part, and the motor driving part, the control unit is configured to control and open and close various valves.

Therefore, by easily crushing through the dust adhered to the gravitational dust collector cone, not only to reduce the work load by manual work but also to prevent iron cracks, gas leakage, etc. to prevent the accident in advance.

1 is a schematic diagram showing a gravity dust collector according to the prior art,

Figure 2 is a detailed explanatory view showing a grinding penetrating device of the gravity dust collector cone according to the present invention,

3 is a cross-sectional view showing a crushing penetrating device of the gravity dust collector cone according to the present invention,

Figure 4 is a flow chart showing a process of operating the crushing penetrating device of the gravity dust collector cone according to the present invention.

Explanation of symbols on the main parts of the drawings

100: gravitational dust collector 110: cone part

120: discharge line 130: discharge valve

140: gas sealing valve 150: control valve

160: driving motor 170: pug mill

11: discharge pipe 12,13: 1st, 2nd automatic shut off valve

14: automatic vent valve 15: inlet valve

16: integrated tank 17: discharge automatic valve

18: Rotary valve 19a, 19b: 1st, 2nd level detection switch

21: drilling screw 22: housing

23: internal pressure detector 24: nitrogen purge control valve

25: bearing 26: driven shaft

27: screw rod 28: forward and backward detection rod

29: limit switch 31: driven gear

32: main gear 33: coupling

34: operation motor 40: control unit

Hereinafter, an embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a detailed explanatory view showing a crushing penetrating device of the gravity dust collector cone according to the present invention, Figure 3 is a cross-sectional view showing a crushing penetrating device of the gravity collector cone according to the present invention, Figure 4 is a gravity according to the present invention As a flow chart showing a process of operating the grinding pen of the dust collector cone, as shown in these figures, the lower portion of the gravity dust collector 100 is provided with a cone portion 110 that is stacked with dust falling, this cone portion 110 The lower part of the) is provided with a discharge line 120 used as a passage for storing the stored dust, the discharge line 120 is a discharge valve 130 for opening and closing the discharge port and the gas sealing valve 140 for blowing the gas And a control valve 150 for controlling the discharge of dust, and the pug mill 170 operated by the driving motor 160 to transfer the discharged dust to the end of the discharge line 120. With this connected structure In the dust discharge device of the dust collector, a discharge pipe 11 having a predetermined diameter along the horizontal direction is installed on the lower side surface of the cone part 110, and the discharge pipe 11 has a first, Second shut-off automatic valves 12 and 13 are provided, and a vent automatic valve 14 is installed on the upper side and the inlet dynamic valve 15 is lowered on the pipe line between the first and second shut-off automatic valves 12 and 13. The integrated tank 16 is installed with the discharge tank interposed therebetween, and the discharge automatic valve 17 and the rotary valve 18 are installed at the outlet side of the integrated tank 16, and at the same time, the pipeline of the rotary valve 18 has a discharge line ( A dust discharge part having a first and second level detection switches 19a and 19b installed at a lower side and an upper side thereof, respectively; On the side of the second shut-off automatic valve 13, a housing 22 in which the excavating screw 21 is built is installed along the horizontal direction, and the internal pressure detector 23 and the nitrogen purge are respectively provided on the upper surfaces of the housing 22. The control valve 24 is installed in communication, and the rear side of the excavation screw 21 is provided with a driven shaft 26 having a female thread through the bearing 25, the operating direction inside the driven shaft 26 A screw rod 27 for helical movement is installed along the rear end of the screw rod 26, and a forward and backward forward detection rod 28 is attached to the rear end of the screw rod 26. An excavation portion in which a limit switch 29 is installed to detect a movement amount of the 26; A driven gear 31 having a plurality of gear trains is installed on the outer circumferential surface of the driven shaft 25, and the main gear 32 is gear-coupled to the driven gear 31 to operate the main gear 32. ) Is a motor driving unit connected to the operating motor 34 installed in the housing via the coupling 33; In response to a signal of the dust discharge part, the excavation part, and the motor driving part, the controller 40 is configured to control and open and close various valves.

Here, the discharge pipe 11 is formed through the iron shell of the cone part 110 in a horizontal direction on the lower side, and the discharge pipe 11 has a first blocking automatic to prevent the dust inside the cone part to be discharged arbitrarily The valve 12 is provided, and the first shut-off automatic valve 12 has a structure in which the second shut-off automatic valve 13 is connected via a short pipe 12a having a predetermined length and diameter.

In addition, a vent automatic valve 14 and a pipe are connected to an upper side of the end pipe 12a, and a inlet dynamic valve 15 for introducing dust generated during excavation is connected to a lower side of the single pipe 12a. Reference numeral 15 denotes a structure in which an accumulation tank 16 having a predetermined size of storage space is connected to accumulate dust.

And, the lower part of the accumulation tank 16 is provided with a discharge automatic valve 17 that is opened and closed to discharge the accumulated dust therein, the lower portion of the automatic discharge valve 17 can discharge the dust. The rotary valve 18 is vibrated so as to be installed.

Of course, the first and second level detection switches 19a and 19b are provided at the lower and upper sides of the integrated tank 16 so as to measure whether the dust level is high or low.

Meanwhile, the excavation part housing 22 is fixedly installed in the second shut-off automatic valve 13 in a horizontal direction, and an excavation screw 21 spirally moving along the longitudinal direction is installed inside the housing 22. It is structured.

Of course, the excavation screw 21 has a length that can be completely crushed through the fixed matter is fixed to the upper end of the discharge valve 130 when the excavation is completed, the outer diameter is the discharge valve 130 It has a structure of a spiral drill shape smaller than the inner diameter of).

In addition, the inside of the housing 22, the screw rod 27 is mounted on the same axis as the center of the drilling screw 21 along the longitudinal direction, the outer circumferential surface of the screw rod 27 shaft so as to drive it The driven shaft 26 is rotatably mounted.

Of course, at least one bearing 25 is installed on the inner wall of the housing 22 to prevent damage while supporting the body of the driven shaft 26.

In addition, the rear end surface of the screw rod 27 is formed integrally with the longitudinal forward and backward detection rod 28 along the longitudinal direction, but protrudes along the circumferential direction at the end of the forward and backward detection rod 28. The striker 28a is attached, and the forward / rearward detection rod 28 has a structure in which limit switches 29 are attached to the front and the rear, respectively.

Of course, the striker 28a is configured to detect the position of the screw rod 27 while being in contact with the limit switch 29.

On the other hand, the upper surface of the housing 22 has a structure in which the main gear 32 which is geared to the driven gear 31 mounted in the circumferential direction along the outer peripheral surface of the driven shaft 26 to transmit power. .

In addition, the main gear 32 has a structure in which an operating motor 34 is connected through a coupling 33.

In addition, all the apparatuses such as the dust discharge part, the excavation part, and the motor driving part have a structure in which the control part 40 which can open and close the valve through mutual control and manipulation is electrically connected and installed.

Hereinafter, the operation according to the present invention will be described in detail with reference to the flowchart of FIG. 4.

When the control unit 40 detects that the discharge line 120 is blocked, the operator first presses the start button in a state in which the selection switch of the control unit is selected as the grinding through.

At this time, since the discharge valve 130, the gas sealing valve 140 and the control valve 150 is closed, only the driving motor 160 of the pug mill is operated. The rotary valve 18 is activated.

In addition, as the second shut-off automatic valve 13 is opened, the nitrogen purge control valve 24 is gradually opened to purge with nitrogen in the housing 22 and the integrated tank 16.

Subsequently, when a predetermined time elapses in the control unit 40, the automatic discharge valve 17 is closed and the rotary automatic valve 18 is stopped. At this time, the pressure of the housing 22 is gravity precipitator 100. The nitrogen purge control valve 24 is controlled so as to have a stationary pressure equal to the pressure of.

At this time, when the controller 40 detects the pressure of the housing 22 through the internal pressure detector 23 and detects the pressure equal to the pressure of the stationary pressure, the operation motor 34 is operated. .

Of course, since the main gear 32 is rotated by the operation motor 34 to rotate the driven gear 31, the screw rod 27 spirally coupled to the inside of the driven shaft 26 is excavated while driving The screw 21 is to be advanced.

Subsequently, since the excavation screw 21 moves forward, the excavated material is continuously excavated, and the excavated crushed product falls down the discharge pipe 11 by the length in which the excavation screw 21 is advanced. 25 is to be stacked in the interior of the accumulator (16).

At this time, when the limit switch 29 detects the completion of the drilling screw 21 advance or the second level detection switch 19b detects, the operating motor 34 banquets the drilling screw 21. It will be reversed.

Subsequently, as the first shut-off automatic valve 12 and the nitrogen purge control valve 24 are closed, the vent automatic valve 14 is opened to lower the internal pressure. In this case, the controller 40 detects this and rotates the rotary valve. Since the valve 18 is operated and the discharge automatic valve 17 is opened, the dust in the accumulator 16 is discharged to the pug mill 170.

If the first level detection switch 19b detects that the dust inside the accumulator 16 is completely discharged, the nitrogen purge control valve 24 opens to clean the remaining dust in the accumulator.

Subsequently, when a predetermined time elapses, the nitrogen purge control valve 24, the second shut-off automatic valve 13, the inlet moving valve 15, and the discharge automatic valve 17 are closed in sequence, and finally the rotary valve 18 is closed. As it stops, the operation of all devices is terminated.

At this time, when the selection switch of the control unit 40 is selected and pressed as a pause, all operations are completed.

As described above, according to the pulverization penetrating device of the gravity dust collector cone for the blast furnace according to the present invention, by easily crushing through the dust stuck to the gravity dust collector cone, not only reduce the work load by manual work but also It will prevent cracks and gas leaks, so it is effective in preventing disasters.

Claims (1)

The lower portion of the gravity precipitator 100 is provided with a cone portion 110 that is stacked as the dust falls, the lower portion of the cone portion 110 is provided with a discharge line 120 is used as a passage for discharging the stored dust, this discharge The line 120 is provided with a discharge valve 130 for opening and closing the discharge port, a gas sealing valve 140 for blowing the gas and a control valve 150 for controlling the discharge of the dust, this discharge line 120 In the dust discharge device of the gravity dust collector composed of a structure connected to the pug mill 170, which is operated by the drive motor 160 to transfer the discharged dust to the end of, A discharge pipe 11 having a predetermined diameter is installed in the lower portion of the cone part 110 along the horizontal direction, and the discharge pipe 11 is provided with side by side first and second shut-off automatic valves 12 and 13. On the pipe line between the first and second shut-off automatic valves 12 and 13, a vent automatic valve 14 is installed on the upper side, and an integrated tank 16 is installed on the lower side with an inlet hydraulic valve 15 interposed therebetween. A discharge automatic valve 17 and a rotary valve 18 are installed at the outlet side of the integrated tank 16, and a pipe line of the rotary valve 18 is connected to the discharge line 120, and the body of the integrated tank 16 is installed. A dust discharge part provided with first and second level detection switches 19a and 19b on the lower side and the upper side, respectively; On the side of the second shut-off automatic valve 13, a housing 22 in which the excavating screw 21 is built is installed along the horizontal direction, and the internal pressure detector 23 and the nitrogen purge control are respectively provided on the upper surface of the housing 22. The valve 24 is installed in communication with each other, and the rear side of the drilling screw 21 is provided with a driven shaft 26 having a female threaded portion through the bearing 25, and the operating direction is provided inside the driven shaft 26. A screw rod 27 for helical movement is installed, and a forward and backward detection rod 28 is attached to the rear end of the screw rod 26, and the screw rod 26 is attached to the moving path of the forward and backward detection rod 28. Excavation portion is provided with a limit switch 29 to detect the amount of movement; A driven gear 31 having a plurality of gear trains is installed on an outer circumferential surface of the driven shaft 25, and the main gear 32 is gear-coupled to the driven gear 31 to operate the main gear 32. The motor driving unit is connected to the operating motor 34 via the coupling 33; And a control unit (40) for outputting a command signal to open and close various valves by receiving signals from the dust discharge unit, the excavation unit, and the motor driving unit.