JPH0148956B2 - - Google Patents

Description

Detailed Description of the Invention The present invention provides a tower-type coke dry extinguishing system that prevents uneven cooling of coke due to particle size segregation in the cooling tower and improves the cooling capacity of the coke dry extinguishing system. Regarding a control device.

When red-hot coke is cooled using coke dry extinguishing equipment, as shown in Fig. 1, the red-hot coke is first collected from coke oven b in a special bucket a, but depending on the carbonization temperature of the coal in coke oven b, Since the upper part of the red hot coke has a coarse particle size and the lower part has a fine particle size, the red hot coke extruded by the pusher c naturally rolls far away from the red hot coke d which has a coarse particle size in the upper part, and is fine in the lower part. Red-hot coke e of particle size rolls nearby. Therefore, coarse particles and fine particles are charged separately into the special bucket a, resulting in particle size segregation.

For this reason, when the red hot coke encased in a special bucket a is poured into the cooling tower f from the top as shown in Figure 2, the particle size segregation remains as it is in the cooling tower f.
Coarse particle size red hot coke d falls on one side of the cooling tower f, and fine particle size red hot coke e falls on the other side.

In addition, cooling gases g and g' are blown into the cooling tower f from the lower part of the cooling chamber h as shown in Fig. 3 in order to cool the red-hot coke. The larger the porosity, the easier the flow of cooling gas, and the greater the coke cooling effect.On the other hand, the opposite is true in areas where the particle size is fine, and the coke cannot be cooled. In other words, when particle size segregation occurs, the coke cooling temperature varies in the circumferential direction of the cooling chamber h, and the coke, which is a mixture of high temperature coke and low temperature coke, flows from the cutting ports i and j shown in FIGS. 3 and 4. It will be discharged.

However, in coke dry extinguishing equipment,
Uniform cooling of red-hot coke is a major mission, so if uneven cooling occurs, it is necessary to wait until the part of the coke that is most difficult to cool (fine particles) has cooled to a predetermined temperature before cutting. be. Therefore, since the coke cutting interval is extended, the coke cutting capacity per hour is significantly reduced, and conversely, in order to keep the coke cutting capacity constant, the high-temperature coke on the fine grain side is kept in contact with the cooling gas until it cools down. Since the volume of the cooling chamber and the amount of cooling gas must be determined so that the cooling chamber can be used, the cooling chamber h is large (high) and the amount of cooling gas is large, resulting in an increase in the size and cost of the entire equipment.

The present invention has been made for the purpose of providing a coke descent rate control device for coke dry extinguishing equipment that eliminates the above-mentioned drawbacks of conventional means and enables downsizing and cost reduction of the equipment.
In a coke dry extinguishing equipment, the lower part of a cooling chamber for cooling descending red-hot coke by rising cooling gas is formed into an inverted conical shape, and a cutout is provided at the lower part of the inverted conical part to discharge the cooled coke, A vertical main shaft that can rotate and move up and down is disposed in the inverted conical portion of the cooling chamber so that the axis of the main shaft substantially coincides with the axis of the cooling chamber, and a truncated cone is attached to the main shaft. A coke descent control plate having a shape cut at a predetermined angle in the circumferential direction around its axis is fixed so that the axis of the truncated cone substantially coincides with the axis of the main shaft. It is.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 5 is an overall view of the coke dry extinguishing equipment equipped with the coke descent rate control device of the present invention.
is a special bucket for receiving red-hot coke,
2 is a cooling tower, 3 is a cooling chamber that cools the red-hot coke, 3a is an inverted cone-shaped part formed at the bottom of the cooling chamber 3, and 4 is a ring from which high-temperature gas that has cooled the red-hot coke is discharged. A flue, 5 is a duct connected to the annular flue 4 and has a dust remover 6 installed in the middle, 7 is a heat recovery boiler that recovers heat from the high temperature gas sent from the duct 5, and 8 is a low temperature boiler from which heat is recovered. 9 is a circulation fan installed in the middle of the duct 8, 10 is an upper divider installed in the inverted conical portion 3a of the cooling chamber 3, and 11 is installed on the upper divider 10 to flow the cooling gas. Cooling chamber 3
13 is a lower binder provided below the upper divider 10 at a required interval; 14 is a gas inlet for blowing cooling gas; 15 and 16 are cooling gas inlets; The cutout port 17 for discharging the coke that has been removed is a plurality of thermometers provided in the circumferential direction of the cooling chamber 3,
The coke descent speed control device 18 includes an upper divider 10 and a lower divider 1 in the inverted conical portion 3a.
It is located between 3.

The details of the coke descent speed control device 18 will be explained with reference to FIGS. 6 to 11.
Attach the bearing 20 to the bracket 19 installed at the bottom of the
Further, bearings 22 are respectively attached to the brackets 21 attached to the upper part of the lower divider 13, and the boss portion 24 of the rotatable lifting gear 23 is fitted to the bearings 22, and a female thread is screwed into the upper end of the boss portion 24. A bearing 25 is fitted inside the boss portion 24 , and a vertical main shaft 26 that is movable up and down and rotatable is fitted into the bearing 25 and the bearing 20 concentrically with respect to the boss portion 24 . A male thread 27 provided in the middle is screwed into a female thread provided in the boss portion 24, and a turning gear 29 is fitted to the lower end of the main shaft 26 via a key 28. The key 28 is the turning gear 2
9 is transmitted to the main shaft 26, but when the main shaft 26 goes up and down, the key 28 goes up and down together with the main shaft 26,
The turning gear 29 is not raised or lowered. Note that the main shaft 26 is located approximately at the axial center of the cooling chamber 3.

A coke fall control plate 30 is fixed to a portion of the main shaft 26 exposed inside the cooling chamber 3. As shown in FIGS. 6 and 11, the coke descent control plate 30 has a shape in which a truncated cone is cut at a required angle (arc angle) θ in the circumferential direction around the axis of the truncated cone. is fixed so that its axial center substantially coincides with the axial center of the main shaft 26.

A bearing 31 is disposed in the lower divider 13 as shown in FIGS. 7 and 8, and a hollow horizontal lifting shaft 32 is rotatably fitted to the bearing 31. The fixed lifting gear 33 is meshed with the lifting gear, and the turning shaft 35 is rotatably fitted into the bearing 34 fitted inside the lifting shaft 32 concentrically with the lifting shaft 32. A turning gear 36 fixed to one end of the lifting shaft 35 is meshed with the turning gear 29, and a gear 39 fixed to the output shaft of the lifting motor 38 is meshed with a gear 37 fixed to the other end of the lifting shaft 32. Seshime, turning axis 3
A swing motor 40 is connected to the other end of 5.

Next, the operation of the present invention will be explained.

The red-hot coke that was put into special bucket 1 was
The cooling gas is introduced into the cooling tower 2 through the charging port at the top of the cooling tower 2, and is cooled by the cooling gas blown into the cooling chamber 3 through the cooling gas inlets 12 and 14 while gradually descending inside the cooling chamber 3.

On the other hand, the cooling gas that has cooled the red-hot coke becomes a high-temperature gas and enters the circular flue 4.
After being sent to the duct 5 and having dust removed by the dust remover 6, it is led to the heat recovery boiler 7, where it is cooled by generating steam, and is again pressurized and cooled by the circulation fan 9. The gas is blown into the cooling chamber 3 from the cooling gas outlets 12 and 14.

The temperature of the coke, which is falling while being cooled, is detected by the thermometer 17, so that the worker can
After confirming which part in the circumferential direction has the highest temperature, the coke fall control plate 30 of the coke fall rate control device 18 is moved to the high temperature part in the cooling chamber 3.

That is, when the swing motor 40 is driven, the swing shaft 35 rotates and power is transmitted from the swing gears 36 to 29, and the main shaft 26 rotates via the key 28, thereby causing the coke descent control plate 30 to swing. . Since the lifting gear 23 is connected to the main shaft 26 by a screw, it receives force as the main shaft 26 rotates, but does not rotate because the lifting motor 38 is stopped.

When the lifting motor 38 is driven, the lifting shaft 32
rotates and power is transmitted from the lifting gears 33 to 23, and since the boss portion 24 of the lifting gear 23 and the main shaft 26 are connected by a screw, the main shaft 26 tends to rotate. However, since the turning motor 40 is stopped, the turning gears 36 and 29 are fixed without turning, and therefore only the main shaft 26 moves up and down.
Coke descent control plate 30 by raising and lowering the main shaft 26
goes up and down. Therefore, the gap L between the coke drop control plate 30 and the inner surface of the inverted conical portion 3a of the cooling chamber 3 is adjusted so that the temperatures detected by all thermometers are approximately the same.

By the above operation, the amount of coke passing through the gap L is limited, and the coke in the area without the coke descent control plate 30 (that is, the area where the cooled coke is deposited) is cut out first, and as a result, The cooling temperature of the coke discharged from the cooling chambers 15 and 16 becomes a substantially uniform predetermined temperature no matter which part of the cooling chamber 3 the coke descends from.

FIG. 12 shows another embodiment of the present invention. In the embodiment described above, the temperature is detected visually by the worker, and the coke descent control plate 30 is rotated and raised and lowered by motor operation, but in this embodiment, the temperature The coke drop control plate 30 can be automatically detected, rotated, and raised and lowered. In the figure, 41 is a plurality of temperature sensors arranged in the circumferential direction of the cooling chamber 3, 42 is a computing machine, and 43 is a control machine, and the same reference numerals as those shown in Fig. 5 refer to the same ones. show.

The temperature signal detected by each temperature sensor 41 is sent to a computer 42, which captures the position of the highest temperature part, and the signal is sent from a controller 43 to a turning motor 40 for turning. The motor 40 is driven to automatically rotate the coke drop control plate 30 to the highest temperature position. If the position of the coke descent control plate 30 still shows the highest temperature after the rotation, a signal from the computer 42 is sent to the lifting motor 38 to drive the lifting motor 38, and the coke descent control plate 30 is moved to its position. The position temperature sensor 41 is raised and lowered so that it no longer indicates the maximum temperature.

On the other hand, the computer 42 captures the maximum temperature and also determines the difference from the minimum temperature, and if the difference is small (approximately 50°C or less), controls such as not rotating the coke descent control plate 30 are performed. This enables fine-grained control.

FIG. 13 shows another embodiment of the power transmission gear used in the present invention, in which the bevel gear used in the previous embodiment is replaced with a worm and a worm wheel. In the figure, 44 is a turning worm;
45 is a turning worm wheel, 46 is a lifting worm wheel, and 47 is a lifting worm wheel.
Even with such a configuration, the coke descent control plate 30 can be rotated and raised and lowered.

In the embodiments of the present invention, a case has been described in which the coke descent control plate is rotated and raised and lowered by a motor, but it is also possible to rotate the coke descent control plate by providing a handle and rotating the handle. The coke descent control plate can be rotated automatically and raised and lowered by motor operation or manually.The coke descent control plate can have a rotating motor and a lifting motor separately. It can be carried out even if it is driven at the same time without being driven, and that it can be carried out even if the drive device for turning and raising/lowering the coke descent control plate is provided in the upper divider instead of in the lower divider, and that it can be carried out even if it is provided in the upper divider instead of in the lower divider. It goes without saying that the turning gear shown in the figure can be used for elevating and the elevating gear can also be used for turning, and that various other changes can be made without departing from the gist of the present invention.

According to the coke descent speed control device for coke dry extinguishing equipment of the present invention, the coke descent control plate has the shape of a truncated cone cut off at a predetermined angle θ in the circumferential direction around the axis of the truncated cone, and can be rotated and raised/lowered. It is possible. Therefore, the coke descent control plate can be stopped at any position in the circumferential direction of the cooling chamber, and at the coke descent control plate stopping position, the coke descent control plate is connected to the inverted conical portion of the cooling chamber over the arc angle θ. The gap with the coke fall control plate can be adjusted. Therefore, since it is possible to control the contact time between the red hot coke and the cooling gas, it is possible to improve the cooling capacity and increase the coke processing capacity.

In order to improve the cooling capacity, the volume of the cooling tower is reduced, and the overall height of the equipment is lowered, resulting in a significant reduction in equipment and installation costs.

If the cooling capacity is improved, the power consumption of the circulation fan for blowing cooling gas and the bucket hoist can be reduced by downsizing the equipment.

Various excellent effects can be achieved.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram of a coke oven, Figure 2 is an explanatory diagram of a coke dry extinguishing system, Figure 3 is an explanatory diagram of the cooling chamber part of the coke dry extinguishing equipment shown in Figure 2, and Figure 4 is an explanatory diagram of the coke dry extinguishing equipment. Fig. 5 is an overall explanatory diagram of a coke dry extinguishing equipment using the coke descent rate control device of the present invention, and Figure 6 is a diagram showing the coke descent rate control device installed in the coke dry extinguishing equipment of the present invention. FIG. 7 is an enlarged explanatory view of the part shown in FIG. Detailed explanatory diagram of the swing gear shown in Figure 10 is X in Figure 9.
-X direction arrow view, FIG. 11 is a plan view of the coke descent control plate shown in FIG. 8, and FIG. 12 is an explanation of another embodiment of the coke descent speed control device for coke dry extinguishing equipment of the present invention. 13 are explanatory views of other embodiments of the power transmission mechanism for turning and lifting used in the coke descent speed control device shown in FIG. 5, FIG. 12, etc. In the figure, 3 is a cooling chamber, 3a is an inverted conical part, 10 is an upper divider, 13 is a lower divider, 18 is a coke descent speed control device, 23 and 33 are lifting gears, 29 and 36 are turning gears, and 30 is a Coke descent control plate, 32 is a lifting shaft, 35 is a turning shaft, 3
8 is a lifting motor, 40 is a turning motor, and 41 is a temperature sensor.

Claims (1)

[Claims] 1. In coke dry extinguishing equipment, the lower part of the cooling chamber for cooling the descending red-hot coke by the ascending cooling gas is formed into an inverted conical shape, and a cutout is provided at the lower part of the inverted conical part to discharge the cooled coke. , a vertical main shaft that can rotate and move up and down is disposed in the inverted conical portion of the cooling chamber so that the axis of the main shaft substantially coincides with the axis of the cooling chamber, and the main shaft has a truncated conical shape. A coke fall control plate having a shape cut at a predetermined angle in the circumferential direction around its axis is fixed so that the axis of the truncated cone substantially coincides with the axis of the main shaft. Coke descent rate control device for coke dry extinguishing equipment.