KR100775216B1 - An apparatus for controlling the movement of rotary kiln - Google Patents

Abstract

The present invention relates to a rotary kiln for calcining limestone, in which a furnace is always rotated without overloading at an intermediate position not interfering with the upper and lower support rolls in a rotary kiln having a slope and discharging and distributing the product in a continuous process. The present invention relates to a reciprocating movement control apparatus for a rotary kiln, which enables a stable operation of a facility.

The present invention provides a thrust tire when a guide roller is installed on at least one plane tire of a roche to provide a movement detecting means for measuring the position of the roche, and the roche is in an excessively elevated position. A feeding means having a nozzle for feeding lubricating oil so as to form an oil film, and having cleaning means for scraping off the oil film from the surface of the trust tire when the position of the furnace body is in an excessively lowered position; Provided is a reciprocating movement control apparatus for a rotary kiln comprising a movement detecting means, a feeding means and a control means for controlling the cleaning means to be continuously operated.

Rotary kiln, reciprocating control device, paper feeding means, furnace, cleaning means

Description

Reciprocating control device of rotary kiln {AN APPARATUS FOR CONTROLLING THE MOVEMENT OF ROTARY KILN}

1 is a process chart showing a product production process through a conventional rotary kiln;

Figure 2 is a schematic perspective view showing a part of the conventional rotary kiln cut;

Figure 3 is a side view showing in detail the support roller of the rotary kiln shown in FIG.

Figure 4 is a perspective view showing an overall reciprocating movement control apparatus of a rotary kiln according to the present invention;

5 is an external perspective view showing in detail the configuration of the reciprocating movement control device of the present invention shown in FIG.

6 is a perspective view schematically showing the configuration of a movement detecting means provided in the reciprocating movement control apparatus of the present invention shown in FIG.

7 is an exploded perspective view of the reciprocating movement control device shown in FIG.

8 is a block diagram showing an example of the configuration of a control system provided in the reciprocating control apparatus for a rotary kiln according to the present invention;

9 is a flowchart of a program according to an embodiment of a control method according to the present invention.

       <Description of the symbols for the main parts of the drawings>

5 ..... Input means 10 ..... Control means                 

12 .... Display means 20 ..... Movement detection means

21a, 21b ... guide rollers 22a to e ... sensors

25 .... Bracket 50 .....

51a, 51b ... Feed nozzle 52 ..... Distribution tube

55 .... Feed pump 60 ..... Cleaning means

64 ... cleaning plate 200 ...

200a, b ... tire 206 .... burner

214a ~ d ... support roll 218 .... side support roll

The present invention relates to a rotary kiln for calcining limestone, and more particularly, in a rotary kiln having a slope and carrying out a sudden process and light distribution of a product in a continuous process without the overload at an intermediate position where the furnace body does not interfere with the upper and lower support rolls. The present invention relates to a reciprocating movement control apparatus of a rotary kiln, which is improved to enable rotation and stable facility operation.

A configuration of a conventional rotary kiln with reference to FIGS. 1 to 2 and 3 is as follows. Generally, limestone, which is powder of 10 to 40 mm, is washed with water and temporarily stored in a storage hopper 202 provided at the inlet side of the furnace body 200, and the limestone granulated in the storage hopper 202 is preheater 204. ), And then the limestone is charged into the furnace 200 at regular intervals according to the amount of production by the built-in charging devices 205a to f.

Then, the limestone charged into the furnace 200 is fired at a high temperature at 900 ° C or more by the combustion burner 206 installed at the end. At this time, the gas in the furnace 200 forms a passage integrated with the preheater 204 and is discharged to the stack 209 through the scrubber 28 through suction scrubber 207 through the exhaust duct 213. do.

On the other hand, the limestone charged in the furnace body 200 having a length of 40 to 50 meters in the process is generated by the carbon dioxide in the gaseous state by the decarbonated action is included in the exhaust gas is discharged, the limestone in the solid state is calcined to produce quicklime In this way, pure quicklime having a weight of 56% by weight of limestone is produced.

However, in the quicklime manufacturing process, the limestone in the furnace body 200 is reduced to the quicklime and at the same time, it is rapidly and light distribution, and in this process, the furnace 200 is rotated. In addition, due to the difference in specific gravity of limestone and quicklime, there is always a difference in weight between the entrance and exit of the roche 200. Accordingly, the center of gravity of the roche 200 has a relatively high ratio of limestone in the upper side (entrance). By inclining in order to maintain the balance of the furnace, the inclination of 1 ~ 2 ° is made to be high on the upper side.

Referring to FIG. 2, the firing furnace has two ring-shaped tires 200a and b respectively disposed on the supply and distribution sides to support the furnace 200, and at a lower portion thereof, a predetermined distance is disposed to the left and right sides. The support rolls 214a to d and the support rolls 214a to d that are rotatably supported by the plurality of fixing stands 223 and the plurality of side support rolls 218 are disposed on the support rolls 214a to d. The tires 200a and b of FIG. 3 are mounted to rotate by being engaged by a pinion gear 216 connected to the shaft of the drive motor 215 and a girth gear 217 of the roche 200.

The rotary firing furnace 200 has a rotational speed of 0 to 10 rpm, and in the firing operation, when the yield is low, that is, when the firing furnace 200 rotates at a low speed, the center of gravity of the inside of the furnace 200 is similar. Therefore, when the furnace 200 slides downward in the downward direction (outgoing direction) on the support rolls 214a to d, on the contrary, when the production volume is high, that is, when rotating at a high speed, the center of gravity inside the furnace is large in the upward direction. The furnace body 200 is slid in an upward direction (inlet side) on the support rolls 214a to d.

As such, the movement of the furnace 200 is not suddenly large, but as a result, the thrust tire 200a excessively presses the plurality of side support rolls 218 to cause damage. In this case, since the operation of the equipment is stopped, a plurality of side support rolls 218 are mounted to form a predetermined interval on the upper and lower sides with respect to the thrust tire 200a installed in the light dispatching unit to prevent this. Due to this spacing, the furnace 200 is supported to rotate in the center thereof without departing from the upper and lower risk limits.

However, the huge furnace 200 is inclined in either direction during operation, which causes the thrust tire 200a to contact a plurality of lateral support rolls 218 to overload the rotation of the furnace 200. Accordingly, the bearing of either one of the plurality of upper and lower side support rolls 218 is damaged, and thus, serious problems in operation such as having to pause the equipment for a long time in order to replace them remain.

Therefore, in order to prevent this, the operating method of the kiln furnace 200 is changed to operate by changing the rotational speed of the furnace 200 according to the up and down movement of the furnace 200.

That is, when the furnace 200 descends to the exit side, the rotation speed of the furnace 200 is increased, and when the furnace 200 rises to the upper side, the furnace 200 is lowered to prevent the excessive rise of the furnace 200. In this case, the number of side support rolls 218 will be protected, but the rotational speed will be changed in response to frequent movement of the furnace 200, which will seriously affect the furnace sulfur and deteriorate the quality and work productivity of quicklime. do.

Therefore, the rotational speed of the furnace 200 is changed only in accordance with the before and after processes and the inventory amount, and is almost fixed.

On the other hand, in another actual operation method, the furnace 200 is always in contact with the lower side support roll 218 and is operated while being excessively moved upwards, the thrust or plane tires 200a and b of the supply and distribution sides. An oil film is formed in the film to prevent temporary rise of the furnace body 200. In other words, the tires 200a and b slide smoothly on the support rolls 214a to d so that the furnace 200 descends.

However, this means that when the operator excessively applies the oil film of the tires 200a and b manually, the roche 200 again slides excessively downward, and in this case, the tires 200a and b are moved from the tires 200a and b. If the oil film is not removed quickly, the furnace body 200 cannot be guided upward again, and eventually, the lateral support rolls 218 are broken.                         

That is, when the oil film is abundant according to the amount of lubricant between the tires 200a and b and the support rolls 214a to d, the furnace body 200 is lowered. When the oil film is thin, the furnace body 200 is raised. 200 is to adjust the descent.

Therefore, this requires a considerable amount of skill and also has a variety of problems, such as the work load, such as the need to check the state of the furnace body 200 from time to time, as well as disaster factors due to the approach of the rotating furnace body 200 remains.

Therefore, the present invention is to solve the above-described problems, it is possible to prevent the overload of the equipment by automatically rotating without overload in the middle of the furnace body does not interfere with the upper and lower support roll, the change of the movement of the furnace body It is an object of the present invention to provide a reciprocating movement control device of a rotary kiln, which can be improved to significantly improve the productivity of quicklime products due to the stabilization of a facility by being able to check the state of an accurate and appropriate time.

In order to achieve the above object, the present invention, in the reciprocating movement control device for preventing the overload by lifting and lowering the furnace in a no-load state that does not interfere with the upper and lower support rolls of the rotary kiln, A guide roller is installed on at least one plain tire to provide a movement detecting means for measuring the position of the furnace, and when the position of the furnace is in an excessively elevated position, lubricating oil is formed to form an oil film on the trust tire. And a feeding means having a nozzle for feeding, and a cleaning means for scraping off an oil film from the surface of the thrust tire when the position of the furnace body is in an excessively lowered position, wherein the movement detecting means and the feeding means are provided. And control means for controlling the cleaning means to be continuously operated. By providing a reciprocating movement control device for a rotary kiln characterized in that.

EMBODIMENT OF THE INVENTION Hereinafter, the reciprocating movement control apparatus of the rotary kiln which concerns on this invention is demonstrated in detail with reference to attached drawing.

In the drawings referred to in the present invention, components having substantially the same configuration and function will use the same reference numerals.

Figure 4 is a perspective view of the application of the reciprocating movement control apparatus for a rotary kiln according to an embodiment of the present invention, Figure 5 is a perspective view schematically showing the configuration of the reciprocating movement control device of Figure 4, Figure 6 is a movement of Figure 4 A perspective view schematically showing the configuration of the sensing means.

The reciprocating movement control apparatus 1 of the rotary kiln according to the present invention has an input means 5 for inputting the start of operation of the rotary kiln.

The input means (5) is a device for inputting the feed amount set value, the start of operation, etc. by the user to the control means 10 to be described later, the input means (5) is a firing furnace which is the control means (10) It may consist of a general key input device for inputting information into a process computer (not shown) of the facility.

And, having a movement detecting means 20 for measuring the position of the roche 200, the movement detecting means 20 is at least one or more of the roche 200, as shown in detail in FIG. The guide rollers 21a and b are attached to the plain tire 200b, and the five proximity sensors 22a-e are fixedly installed in the back position.

That is, the movement detecting means 20 is an apparatus for measuring the up and down reciprocating movement distance of the furnace body 200 generated when the firing furnace body 200 is operated. In the present invention, at least two plane tires 200b are used. The guide rollers 21a and b described above are disposed to the left and right sides of the plain tire 200b, respectively, and the guide rollers 21a and b arranged respectively are fixed to the bracket 25 and are configured to be upper, lower, female, male, and female. One of the sliding bars 26a and b is fixed to the upper sliding bar 26a, and one surface of the lower sliding bar 26b is fixed to the ground by the support frame 27.

In addition, the upper and lower sliding bars (26a, b) is formed so that the upper sliding bar (26a) is formed on the lower surface △ projection (not shown), the lower sliding bar (26b) corresponds to the upper surface The upper sliding bar 26a is moved on the lower sliding bar 26b by forming a groove to be coupled.

Then, the upper sliding bar 26a is fixedly provided with a "T" type detection plate 28 on the rear side at a position suitable for operating the proximity sensors 22a to e on the rear side, and the "T" type sword. Corresponding to the publication 28 is provided by using the fixing member 30 to the frame 29 to form a predetermined interval and fixed the five proximity sensors 22a to e on the ground.

The proximity sensors 22a to e are configured to transmit electrical signals to the control means 10.

Then, based on the signals output from the sensors 22a to e, the signal from the control means 10 is received to determine the position of the roche 200, and according to the roche position of the other thrust tire 200a. And a paper feeding means 50 for forming an oil film on the driving portion, and a cleaning means 60 for scraping off the oil film from the driving portion.

The paper feeding means 50 and the cleaning means 60 are pneumatic cylinder 51 and the pneumatic pressure which can be operated at a predetermined distance from the rear side of the thrust tire 200a on the other side as shown in detail in FIGS. 5 and 7. Connected to a solenoid valve (not shown) capable of operating the cylinder 51 in a forward / reverse reciprocation and a four-axis rotary arm 40 connected to the rod 51a end of the pneumatic cylinder 51, The feeding means 50 is connected to the connection pin 42 through the hole 40a in the rotary arm 40, and the cleaning means 60 is connected in the same manner to the other hole 40b so as not to be struck. In the reciprocating movement of the cylinder 51, the paper feeding means 50 and the cleaning means 60 are configured to operate opposite to each other.

In addition, the four-axis rotary arm 40 is a "Y" shape of a predetermined size so that the central axis 40c can be inserted into the shaft in each of three directions in the state that the center axis 40c is fixed by the pin 43a on the frame 43 side. There are three holes, and the hole 40c formed in the center is fixed to the frame 43 as a central axis, and one surface of the frame 43 is fixed to the ground.

In addition, the feeding means 50 is axially coupled to one side with the hole 40d to which the pneumatic cylinder 51 of the four-axis rotary arm 40 is connected, so that the plurality of nozzles 51a and b are formed on the thrust tire 200a side. The nozzle 51a.b is connected to the distribution pipe 52, and the distribution pipe 52 is connected to the feed pump 55 through the conduit 54. The distribution pipe 52 and the feed pump 55 are connected to the conduit 54 of the flexible hose and fed in a free flow state.

In addition, the cleaning means 60 fixedly connected to another hole 40b of the 4-axis rotary arm 40 to which the paper feeding means 50 is connected is a clip-shaped frame 61 suitable for the width of the thrust tire 200a. Ejector 62 having a lower opening is connected to and fixed by bolts and nuts which are fixing members 63, and cleaning plate 64 formed at an acute angle of 30 ° to the other open side of the ejector 62 is fixed member. It is connected and fixed by 63.

And the lower part of the discharger 62 is equipped with a discharge door (65) at the end to be opened and closed if necessary to the structure to be fixed to the discharger 62 and feldspar (not shown) to the other side Is formed.

In addition, when the position of the roche 200 is at the upper limit by feeding the thrust tire 200a according to the detection result of the movement detecting means 20, the paper feeding means 50 is always positioned at neutral. ), And when the position of the furnace body is at the lower limit, the cleaning means (60) is operated to have a control means (10) for repeatedly controlling the operation of scraping off the lubricant from the surface of the thrust tire (200a), It also includes display means 12 adapted to monitor the signal.

The control means 10 may be a process computer (not shown) of the kiln facility, and the display means 12 may be a monitor electrically connected to the process computer.

Therefore, the control means 10 controls the display means 12 with respect to the operation control state and the measured position of the roche 200, and the paper feeding means 50 and the paper feeding means 50 according to the control signal of the control means 10. The cleaning means 60 is driven and the driving time thereof is controlled.

The control operation according to the apparatus of the present invention configured as described above will be described in detail with reference to the accompanying drawings.                     

Referring to FIG. 4 to FIG. 9, first, the rotary kiln 200 is operated in the firing process, and the furnace is in the field through the input means 5 of the reciprocating movement control device 1 according to the present invention. Set the movement limit position and the feed amount of 200 to select the use of the device after the work preparation is completed.

As described above, the rotary firing furnace 200 starts to move up and down while the furnace 200 is rotated while calcining limestone by the combustion heat of high temperature in the burner 206 installed at the end.

In the firing process, the current position signal of the furnace 200 is received by the control means (process controller) 10 by the five proximity sensors 22a to e of the movement detecting means 20. The control signal generated in 22a to e) is controlled by the paper feeding means 50 and the cleaning means 60 according to the measured positional body position signal 200 as described below.

In the movement detecting means 20 of the present invention, when the firing furnace body 200 is rotated by the firing of limestone by the combustion burner 206, the furnace body moves in one direction, and the plain tire 200b is The guide rollers 21a and b installed on both sides are operated so that the sliding bar 26a moves together with the movement of the furnace 200, and the detection plate 28 comes into contact with two proximity sensors (for example, 22a to 22b, 22b to 22c, 22c to 22d, and 22d to 22e, and the signals sensed by the proximity sensors 22a to e are converted into digital data by the signal converter 16 and then the control means 10 Is provided.

The five proximity sensors 22a to e utilized as the movement detecting means 20 have a maximum limit (Max 22d, Max 22e) and a minimum limit (Min 22b, Min 22a) in the state of the sensor (Max 22d) and the center sensor. 22c, the paper feeding means 50 or the cleaning means 60 are activated at the signals of the sensor 22c and the sensor Min 22b, and when the detection of the center proximity sensor 22c is included, It is preferable to set to operate as a reference.

In the manual mode, the paper feeding means 50 and the cleaning means 60 may be controlled to be operated in the cab.

In the control method of the paper feeding means 50 and the cleaning means 60, after waiting at the position where the rod 51a of the pneumatic cylinder 51 is always discharged, the proximity sensor 22d and the proximity sensor 22c of the center position are waited. If the detection plate 28 is in contact with the detection plate 28 and lasts for a predetermined time (preferably for 1 minute or more), the feeding means 50 having a predetermined interval with the thrust tire 200a is fed by a predetermined amount (preferably 180g / time) and then measure the signals of the sensors 22a to e to track the position of the roche 200 for 5 minutes.

The feed amount can be adjusted in consideration of the operating time according to the capacity of the feed pump 55 in the actual operation, the feed pump 55 is automatically opened and closed for a predetermined time so that the feed is made.

If the roche 200 is still at the sensor positions 22c and 22d after 5 minutes, it is determined that the feeding amount at the most appropriate position is automatically refeeded after a predetermined time, but the sensor 22c and the sensor 22b In the case where the position of the sensor is sensed downward and stops feeding, the standby state continues, and when the proximity sensor 22b and the proximity sensor 22a of the lower limit position are detected, the pneumatic cylinder 51 immediately loads ( 51a) is operated to pull the cleaning means 60 in close contact with the thrust tire 200a, and at the same time, the paper feeding means 50 is spaced apart from the thrust tire 200a.

In this case, the cleaning plate 64 of the cleaning means 60 is in close contact with the surface of the thrust tire 200a to remove the coating of the oil film formed on the surface, wherein the dried oil is processed in the ejector 62. .

In addition, the cleaning means 60 continues to operate as long as the position of the furnace 200 is in the lower limit sensor 22a, but when the position of the furnace changes in the upward direction, the rod 51a of the pneumatic cylinder 51 Is released, and the paper feeding means 50 operates in reverse to the above.

In this operation, the furnace 200 is always reciprocated between the sensor 22d and the sensor 22c, and the positions of the sensor 22c and the sensor 22b, thereby minimizing the load on the side guard paper roll 218. will be.

However, in this operation, as detected through the sensor 22d and the sensor 22e, continuous feeding is performed in a shorter (preferably two minutes) period if the furnace 200 continues to be loaded upward.

In addition, the motion of the sensor detected in this process can be continuously tracked by the control means 10 to set the feed amount automatically or manually, the roche 200 between the sensor 22c and the sensor 22d, and the sensor The operation is repeated so as to operate only between the 22c and the sensor 22b.

In this way, the present invention can be raised and lowered so as to rotate in the no-load state at all times without interfering with the upper and lower side support rolls 218, and transmits the state to the control means 10 for display. Will be.

According to the present invention described above, it is possible to prevent the overload of the equipment by rotating the furnace 200 in a no-load state that does not interfere with the furnace 200 and the upper and lower side prevention paper roll 218 and performing the calcining operation In addition, it is possible to confirm the state of the accurate and appropriate time for the change in the movement of the furnace 200 is effective in greatly improving the productivity of the limestone product due to the stability of the facility.

Claims (5)

In the reciprocating movement control device for preventing overload by raising and lowering the furnace body in a no-load state that does not interfere with the furnace body 200 of the rotary kiln in the upper and lower side prevention paper roll 218, The guide rollers 21a and b are installed on at least one plane tire 200b of the furnace 200 to install a movement detecting means 20 for measuring the position of the furnace 200. When the position of the 200 is in an excessively elevated position, it is provided with a feeding means 50 having a nozzle for feeding lubricating oil so as to form an oil film on the thrust tire 200a, the position of the furnace 200 is excessively When in the lowered position, having a cleaning means 60 to scrape off the oil film from the surface of the trust tire (200a), the movement detecting means 20, the paper feeding means 50 and the cleaning means (60) Reciprocating movement control device of a rotary kiln, characterized in that it comprises a control means (10) and the like that can be controlled to operate continuously. The method of claim 1, wherein the movement detecting means 20 is arranged on the plain tire (200b) at least two guide rollers (21a, b) to the left and right of the plain tire (200b), respectively, the guide roller (21a, b) is fixed to the upper sliding bar (26a) on the lower sliding bar (26b) fixed to the bracket 25, the upper sliding bar (26a) position to operate the proximity sensors (22a ~ e) The detection plate 28 is fixedly mounted on the detection plate 28, and the five detection sensors 22a to e are provided at regular intervals in correspondence with the detection plate 28 so that the detection plate 28 is approached as the furnace moves. A reciprocating device for a rotary kiln, characterized by moving on sensors (22a to e) to detect the position of the furnace. The four-axis rotary arm of claim 1, wherein the paper feeding means (50) and the cleaning means (60) are connected to a pneumatic cylinder (51) operable at a predetermined distance and to a rod (51a) end of the pneumatic cylinder (51). Respectively connected to 40, the paper feeding means 50 is connected to the hole 40a by a pin 42, and the cleaning means 60 is fixed to the other hole 40b, so that the pneumatic cylinder 51 The paper feeding means 50 and the cleaning means 60 can be operated opposite to each other with respect to the thrust tire 200a during the reciprocating movement, and the four-axis rotary arm 40 has a hole 40c formed at the center thereof. A reciprocating movement control device for a rotary kiln, wherein the central axis is fixed to the frame (43), and one surface thereof is fixed to the ground. The method of claim 3, wherein the paper feeding means 50 is axially coupled to one side with the shaft (40d) to which the pneumatic cylinder 51 of the four-axis rotary arm 40 is connected to a plurality of nozzles (51a, b) and the nozzle The distribution pipe 52 and the feed pump 55 to fix the (51a.b), the distribution pipe 52 and the feed pump 55 is connected to the conduit 54 of the flexible hose free flow It is fed in the state, the cleaning means 60 is fixed to another hole 40b of the four-axis rotary arm 40 to which the paper feeding means 40 is connected, the clip-shaped frame to fit the width size of the thrust tire (200a) The ejector 62 having the lower part opened to the 61 is fixed by a bolt and a nut, which is a fixing member 63, and the cleaning plate 64 formed at an acute angle is formed at the other open side of the ejector 62. Reciprocating movement control device of the rotary kiln characterized in that the connection is fixed by the fixing member (63). According to claim 1, wherein the control means 10 further comprises a display means 12 to display the operation state and the measured position of the roche 200 and the measured roche position information on the display means 12, the movement detection means A reciprocating movement control apparatus for a rotary kiln, characterized in that for driving the paper feeding means (50) and the cleaning means (60) based on the detection signal from (20).

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