JPS6155188A - Control of coke bucket in dry-quenching equipment for coke - Google Patents

Abstract

PURPOSE:To allow coke to fall continuously, to eliminate the occurrence of bridging in a hopper, to reduce a thermal load, and to enable the reduction in the size of a hopper and the elimination of segregation by particle sizes of coke in a cooling tower, by controlling by stages the opening of te gate of the hopper. CONSTITUTION:A coke bucket 3 loaded with coke is wound down to reach point A, where it comes into contact with a hopper 2 to open a gate 5, and the opening will be W1 at point b. Between point A and point B, the coke drops scatteringly into the hopper 2. With reduced speed of rotation of a motor, the bucket 3 continues to be wound down at a low speed and at the same time, the opening of the gate 5 continues to be increased up to the opening W2 at point C. Between point C and point D, the opening is fixed to W2 for a prescribed period of time. At point D, the motor is restarted to rotate at a low speed, and the bucket 3 continues further to be wound down, with the opening of the gate being increased. The gate 5 is made to open to its full width at point E to discharge all teremaining coke, and is kept at full opening to point G to complete the charging of te coke into a cooling tower 1. The coke can fall continuously without being stopped in the hopper 2.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for controlling a coke bucket when red-hot coke in the coke bucket is charged into a cooling tower via a hopper in coke dry extinguishing equipment. In particular, it concerns a system in which red-hot coke is dropped into a hopper at once, but <T<T < continuously.

[Prior Art] In coke dry extinguishing equipment, when red-hot coke is charged into a cooling tower, it is charged from a coke bucket via a hopper. The conventional method of controlling the coke bucket during this charging is based on a time cycle, which is not shown in FIG. In other words, the bottom gate of the adopted bucket is closed while it is suspended by the lobes, and when the lobes loosen, the gate opens due to the weight of the red-hot coke, but the bucket does not come into contact with the hopper. After passing through the contact point A, the hopper sinks under the load of the bucket due to the compression of the buffer spring, so if the lobe is still let out, the bucket will continue to be lowered. Although it slows down somewhat after contact, the lobes are sent out at high speed, allowing the gate to open fully at once. The dropping of red hot coke into the hopper begins when the gate is fully opened, but in reality it takes some time for the gate to fully open, so dropping begins before the gate is fully opened. Then, the total amount of coke is charged into the hopper, and the charging time during which the Iζ coke is discharged from the hopper, that is, the charging time when all sets of coke are completely charged into the cooling tower, is the charging time of the charging port of the cooling tower. It is determined by size.

[Problems to be Solved by the Invention] However, in the conventional coke bucket control method described above, the buckets are fully opened at once and all the coke is charged into the hopper, which causes the following problems.

(1) All m of coke is allowed to fall naturally by gravity from the discharge port at the bottom of the hopper, but the charging time is long because the time for discharging from the discharge port is determined by the serrations at the cooling tower charging port.

(2) Coke is dropped into the hopper from a bucket in a batch system and naturally falls by gravity from the discharge port below the hopper, but at this time there is a high probability that shelf suspension will occur at the hopper discharge port.

(3) Since the hopper is exposed to high temperatures until all coke is discharged, it is necessary to reduce the heat load.

(-1) All coke! Because of this, the capacity of the hopper itself is large, which increases the overall height and cost of the equipment.

(5) Since the coke is charged into the hopper in a state where the coke is left intact from the coke oven, the influence of particle size segregation that occurs when the coke is left in the coke remains in the cooling tower.

[Purpose of the Invention] This invention was made in view of the above-mentioned problems of the prior art. By dropping coke into the hopper continuously rather than batchwise, the coke charging time can be shortened, and the shelf hanging in the hopper can be reduced. The purpose of the present invention is to provide an excellent method for controlling coke buckets in coke dry extinguishing equipment that prevents the occurrence of heat and reduces heat load, and also makes it possible to downsize the hopper and eliminate coke particle size segregation in the cooling tower. It's tall.

[Summary of the Invention] In order to achieve the above object, this invention always makes the amount of coke falling from the bucket equal to the amount charged at the charging port since the size of the cooling tower charging port is fixed. Based on the knowledge that IJ has a constant and highest falling speed, the coke bucket is not opened fully at once, but descends from the hopper into the cooling tower.
The steps of descending from the bucket to the hopper are controlled step by step so that the process of descending from the bucket to the hopper is at least approximately equal in the process of reaching all the stages of the bucket.

Embodiment E] An embodiment of the present invention will be described below based on FIGS. 1 to 4.

As shown in FIG. 1, the coke charging device consists of a hopper 2 provided at the charging port of a cooling tower 1, a coke bucket 3 for lowering the loaded red-hot coke into the hopper 2, and a coke bucket 3 and the hopper 2. +2! It consists of a dust collection hood 4 interposed in the dust collection hood I. The hopper 2 is supported by a buffer spring (not shown), and the bucket 3 is placed on the hopper 2 while absorbing the load of the bucket 3.

The coke bucket 3 has an opening/closing device that opens a double-opening gate 5 provided at the bottom by 6n. This gutter opening device is
It consists of a link 6 that opens and closes the gate 5 by its operation, and a rod 7 that operates this link 6. When the rod 7 is pulled up, the gate 5 is closed, and when it is pulled up again, the bucket 3 is suspended. Conversely, when the rod 7 is pushed down, the gate 5 opens. As shown in FIG.
By letting out the lobe 1o, the bucket 3 is lowered, and conversely, by retracting the lobe 10, the bucket 3 is hoisted up. Particularly in this embodiment, the electrolytic plate 8 that rotationally drives the 8-barrel 9 is rotated in stages according to the following sequence.

(2) A-B section From the time the bucket 3 contacts the hopper 2 (more precisely, the dust collection hood 4) until the bucket gate 3 reaches the opening W1, the lobe payout speed is maintained at almost the same high speed as before. Here, the ca degree W1 is determined by the size of the coke lump, and is approximately 400 mm in this example.

■B-C section bucket opening V? The lobe is delivered at low speed until the opening degree reaches W2 (>Wl). Here, the opening degree W2 is set to 1 shift such that the descent m Q 1 from the hopper 2 into the cooling tower 1 is approximately equal to the descent m Q 2 from the bucket 3 to the hopper 2, and in this example, it is approximately 600 mm. be.

■C-DC- When the distance W2 is reached, the motor is stopped in order to stop the lobe feeding for a predetermined period of time in order to maintain this 00 degrees W2. During this predetermined time, Q L = 02 while maintaining the opening w2.
is the time that continues.

- Deliver the lobe at low speed from the bucket opening W2 to W3 in the D-E section.

■When the E-G interval reaches W3, the motor is stopped for a predetermined period of time. This predetermined time is the time taken into account the time required for all the coke in the bucket 3 to be liquefied while the bucket 3 is kept fully open, plus the extra time.

The above-mentioned sequence may be a fixed relay sequence set by each section timer, or may be configured such that the 8, C, and DI points in the section are detected by an appropriate sensor.

Now, in the above configuration, as shown in FIGS. 3 and 4, when the coke bucket 3 loaded with coke is lowered from the top of the tower and reaches point A, it contacts the hopper 2 and moves at high speed to the gate 5. opens and becomes the opening degree of Wl at point B. In this Δ-B section, the coke in the bucket falls into the hopper 2 in pieces. The reason why the gate opening speed in this section is set to high is that the falling amount is small in this section, so the opening speed is fast (and the time is shortened).On the other hand, the gate opening speed at point B is set to Wl (z400mm ) to prevent it from opening too much is to prevent the shelf from hanging inside the hopper 2 due to large seedlings falling.

When the point B is reached, the rotational speed of the electric motor 8 is reduced, and the bucket 3 is lowered at a low speed, and the gate 5 is opened. This scrubbing coke increases its falling amount and begins to fall continuously. This state continues until the opening degree W2 reaches the 0 point.

The reason why the gate opening speed in this B-C section is not as high as in the A-B section but slow is to prevent the shelf from hanging, and the opening speed toward opening W2 is the lowering speed. This is to gradually increase the temperature and move to the next stable zone.

In the C-C section, which is a stable section, the gate opening a W 2 is fixed for a predetermined period of time. Therefore, the descending ffi Q from hopper 2 into cooling tower 1 and bucket 3 from hopper 2
The state in which the number of Q2 descended to bucket 3 continues to be the same, and bucket 3
The coke inside is quickly and smoothly discharged.

When reaching point D, the electric motor 8 is rotated at low speed again, the bucket 3 is further lowered, and the opening degree of the gate is checked. This means that if the opening degree W2 is maintained for a predetermined period of time, baguette [
- Since the amount of coke falling from 3 is reduced, this is to be prevented, ensuring the fall mQ2, and draining the residual coke in the bucket S efficiently. The reason why it is not fully opened all at once is to prevent the amount of descent from becoming a huge river.

Then, at point E, gate 5 is fully opened to discharge all remaining coke, and in order to completely discharge the coke, the G
The coke charge into the cooling tower 1 is completed by maintaining the full opening until the point.

In this way, according to the above embodiment, the opening degree of the gate of the bucket 3 is controlled in stages such as small opening, intermediate opening, and full opening, so that the coke is allowed to fall continuously without being stopped in the hopper 2. 2 does not need to receive the entire a, and the size can be determined just by assuming the case of an emergency, so the hopper can be made as small as possible and the heat load can be reduced.

In addition, due to the continuous descent of coke, charging from the hopper 2 into the cooling tower 1 is carried out smoothly, which is different from the case of batch-type systems, and the coke charging time can be shortened, with a reduction rate of up to 20%. This makes it possible to improve the efficiency of the time cycle from lowering to lowering the bucket 3.

Furthermore, it is possible to effectively prevent shelf suspension in the hopper 2 due to continuous dumping, and furthermore, during continuous descent, the coke collides with the bottom of the hopper 2, so the particle size of the coke in the bucket 3 is reduced. can be effectively alleviated.

In addition, in the embodiment described above, the gate opening degree in the C-D section was kept constant, but the gate opening degree may be adjusted so that the coke level in the section hopper 2 is constant.
By doing so, even smoother charging becomes possible.

[Effects of the Invention] In summary, the present invention exhibits the following excellent effects.

(1) The opening of the coke bucket is controlled in stages instead of fully opening all at once as in the conventional method, so coke can be continuously lowered into the cooling tower without remaining in the hopper. The hopper can be made smaller and the heat load can be reduced, and coke can be charged into the cooling tower in a short time.

(2) Bucket 6; 1 degree is controlled so that the drop rate that descends from the hopper into the cooling tower and the drop that descends from the bucket to the hopper are at least approximately equal in the process toward full opening, so the hopper without any hanging,
The coke in the bucket can be quickly discharged, and the falling coke collides with the lower part of the hopper, thereby effectively eliminating coke particle size segregation in the bucket.

[Brief Description of the Drawings] Fig. 1 is an explanatory diagram of the operation in which the bucket opening degree is controlled in stages to carry out the coke bucket control method according to the present invention, and Fig. 2 is an illustration of lowering and hoisting the bucket. and a schematic configuration diagram of a bucket lifting means that controls the bucket opening degree,
FIG. 3 is a time cycle diagram for lowering a bucket, showing a preferred embodiment of the method of the present invention, FIG. 4 is a time cycle diagram for bucket opening, and FIG. 5 is a time cycle diagram for lowering a conventional bucket. . In the figure, 1 is a cooling tower, 2 is a hopper, and 3 is a coke bucket. Patent applicant: Ishikawa, I:5 Jiff Heavy Industries Co., Ltd. Representative patent attorney: Nobuo Kinutani Figure 1

Claims (1)

[Claims] When charging the red hot coke in the coke bucket into the cooling tower via the hopper, the opening of the coke bucket is determined by the amount of descent from the hopper into the cooling tower and the amount of descent from the bucket to the hopper. 1. A method for controlling a coke bucket in a coke dry extinguishing system, characterized in that control is performed in stages so that and are at least substantially equal in the process of fully opening.