KR20000031023A - Method of wet slaking of red coke and slaking device for it - Google Patents

Abstract

PURPOSE: A method of wet slaking of red coke and its device is provided, which flattens the level of coke in the slaking container, slakes coke with least slaking material and makes water content in the coke constant. CONSTITUTION: The explosion of coke happens when slaking water is sprinkled too much suddenly and water vapor has no room for space and time. This phenomenon is related to temperature. The explosion lessens, if the coke is cooled below 400°C. So a first slaking step is needed until the coke is cooled below 400°C. A second step is followed by a first step and much water is sprinkled when the valve for controlling a flow opens most wide. When the level of water rises to the sensor(10), water is sprinkled. A second water-sprinkling flattens the level of coke and increases the level of water. When the level of water rises to the sensor and it detect the water, water-sprinkling is terminated.

Description

Wet fire extinguishing method of red coke and fire extinguishing system

The present invention relates to a method for wet extinguishing coke extruding after completion of dry distillation in a coke oven and a fire extinguishing apparatus used therein. More specifically, the first initial sprinkling spraying digestive water in a small amount to prevent coke explosion. After that, the coke level of the fire extinguisher is sprinkled in a large amount of water which can be flattened by water pressure in the state where the extinguishing water is not drained, so that all of the coke is immersed in the digestive water for a predetermined time. By draining, it is possible to effectively extinguish coke by a minimum amount of digestive water, and to wet extinguish a coke method for extinguishing coke, and to minimize the amount of water contained in the coke.

In general, the coke completed in the coke oven is coextruded by an extruder and loaded into a fire truck to be wet-fired by the fire extinguishing water supplied from the fire extinguishing tower, and then charged into the blast furnace. The fire truck is subjected to coke while driving at an appropriate speed. do.

1 is a view schematically showing a conventional fire truck structure that is responsible for wet extinguishing coke, the fire truck 100 has a bogie 120 to move along the rail 110, such a bogie 120 It consists of an inclined wall 132 on the side receiving the coke to be extruded, a vertical wall 134 opposite to the inclined wall 132, and a triangular plate-shaped vertical structure wall 136 for closing the front and rear ends in the traveling direction. The body of the fire truck is equipped, and the interior space consisting of such walls 132, 134, 136 is separated into a plurality of coke accommodation chambers by the triangular plate 138. The lower end of the vertical wall 134 includes a gate 140 for discharging the finished coke, and the gate 140 is opened and closed by a plurality of links 142 and 144. A plurality of drainage holes 146 for drainage are formed at 140.

That is, coke extruded on the fire extinguisher 100 moving along one side of the coke oven at an appropriate speed is accumulated, and the coke is extinguished by the extinguishing water sprayed from the digestion tower. Is drained to the outside through the drain hole (146).

However, in the case of wet digestion of coke by the conventional method described above, various problems have occurred. First, the amount of spraying is set to be larger than the drainage so that the water is sprayed until the coke is completely submerged by the water. Compared to the coke loaded on the upper side of the fire truck 100, it is impossible for the whole coke to contain uniform moisture because the coke loaded on the lower side is immersed in the digestive water. Even if moderately digested, the lower coke contains excessive moisture, and therefore, a significant amount of digestive water must be sprinkled relative to the theoretical digestible quantity that can digest the entire coke to a moderate degree.

Next, a problem occurs that the degree of extinguishing (that is, moisture content) varies depending on the position of the coke due to the non-uniform coke level loaded on the fire truck 100, which will be described with reference to FIGS. 2 and 3. When the coke 150, which is extruded after dry distillation is completed, is loaded on the fire truck along the inclined wall 132, the upper level is not the same as shown in FIG. 2, so that the fire water is sprayed from the spray water nozzle 160. As a result, it is almost impossible to extinguish the entire coke to have the same moisture content. If the start of the fire truck 100 is too late and does not correspond to the coke extruding timing, as shown in FIG. 3A, the coke 150 is loaded by being biased toward the rear side so that the glowing portion 152a of the unbalanced portion is loaded. On the contrary, if the start of the fire truck 100 is too fast and does not correspond to the coke extruding timing, as shown in FIG. 152b) is present, and even if the start of the fire truck 100 is normally performed, the coke level of the portion where the triangular plate 138 is located is higher than that of other portions, and thus the glowing portion 152c exists. As a result, the coke level that changes according to the operating conditions of the facility was a barrier to performing the coke digestion uniformly.

The present invention is to solve such a conventional problem, the object of the present invention is to extinguish coke with a minimum amount of sprinkling while leveling the coke level loaded in the fire truck regardless of the operating conditions such as the start speed of the fire truck. In addition, the present invention provides a method for extinguishing wet coke and the fire extinguishing apparatus used therein so that the coke water content after extinguishing is constant.

1 is a configuration diagram schematically showing a glowing coke fire extinguishing device according to the prior art

2 is an explanatory view showing a state in which the extinguishing water is sprayed on the coke loaded inside the fire truck

3a to 3c is a diagram of problem derivation for deriving a problem generated during coking fire extinguishing

Figure 4 is a schematic diagram showing a wet fire extinguishing device of the red coke according to the present invention.

Explanation of symbols on the main parts of the drawings

10 ... fire extinguishing water level sensor

20 ... auxiliary gate

30 ... cylinder

40 ... shock absorber

140 ... gate

146 ... Drainage hole

The present invention as a technical configuration for achieving the above object,

In the wet fire extinguishing method of extinguishing coke by distilling the coking coke in the coke oven by distilling the glowing coke loaded in the fire extinguisher by extruding by the extruder.

After the initial initial spraying for a certain time at a flow rate to prevent coke explosion,

After the first initial spraying, the second concentrated spraying is carried out for a predetermined time at a flow rate at which the coke level is flattened by the spraying pressure.

After the second concentrated spraying, the coke is kept in the digestive water for a certain period of time to maintain deposition,

According to the present invention, a wet fire extinguishing method of red coke is provided, wherein drainage is performed immediately after the deposition is maintained.

In addition, the present invention,

A fire extinguisher moves along a rail passing through a coking oven for discharging red coke and a fire extinguishing tower for discharging extinguishing water, and a gate configured to discharge coke by being connected to a plurality of links at a lower part of the fire extinguisher. In the wet extinguishing device having a plurality of drainage holes for discharging the extinguishing water in the gate,

A fire extinguishing water level sensor mounted on the fire extinguisher to detect that a level of extinguishing water reaches a set height;

An auxiliary gate rotatably mounted on the outside of the gate to open and close a drain hole formed in the gate; And,

And a cylinder mounted to the link and connected to the auxiliary gate to provide opening and closing power of the auxiliary gate.

Hereinafter, the present invention will be described in more detail.

First, the coke obtained by distilling coke from the coke oven is extruded, and the extruded coke is discharged and loaded into a fire truck and then digested by the hydrated water sprayed from the fire extinguishing tower. This schematic process is the same as in the prior art, the present invention is different from the conventional injection and discharge pattern of the digestive water.

First, primary initial watering is performed by spraying a small amount of digestive water on the coke for a certain time to cool the temperature to prevent coke explosion.

In the coke explosion, water vapor is generated when the extinguishing water is suddenly sprayed in large quantities, and when there is no space and time for the steam to be released, the coke in high temperature suddenly comes into contact with a large amount of water and splashes of water in all directions. When this occurs and when the extinguishing water boils and overflows due to high heat, a small amount of extinguishing water is sprayed on the coke for a predetermined time as described above to remove the conditions for generating such coke explosion.

The coke explosion is known to be related to the coke temperature, and may vary slightly depending on the amount of water sprayed, but when extinguishing the coke, which is usually about 600 ℃ during cooling and cooling to 400 ℃ significantly reduces the number of coke explosion, thus 1 The first initial watering step is carried out until the coke has cooled down to about 400 ° C.

At this time, the primary initial watering is more preferable in terms of the operability of the control valve for adjusting the flow rate of the digestive water is gradually increased the amount of watering. That is, when the first initial watering is started, it is preferable to gradually increase with time until the opening degree of the flow control valve reaches the set degree, thereby gradually increasing the amount of extinguishing water sprayed into the coke, Depending on, for example, this first initial sprinkling step takes place during the appropriate time (eg, 11 seconds) to reach 30%. According to this method, the amount of digestion water sprayed during the set time gradually increases and the temperature of the coke gradually decreases. If the increase of the amount of digestion water over time is too fast, the initial initial watering stage is completed, that is, Even when the opening degree of the flow control valve reaches a set degree, it may not be desirable to cause the coke temperature to drop to a temperature that prevents an explosion, and conversely, if the increase in the amount of extinguishing water over time is too slow, 1 Excessive time to complete the first initial watering stage is undesirable in terms of productivity for coke fire extinguishing.

In other words, the amount of coke to be extinguished, the shape of the coke loaded on the fire extinguisher, the flow rate and pressure of the extinguishing water to be supplied, such as the time and opening degree of the first initial sprinkling should be set appropriately, which is This is because the purpose is to cool the coke to about 400 ° C in the state of preventing explosion (before described above, but the possibility of coke explosion is reduced even when a large amount of extinguishing water is sprayed below this temperature). .

Next, the second concentrated sprinkling is performed continuously in the first initial sprinkling step, which increases until the opening degree of the flow control valve is maximized and injects a large amount of digestive water, wherein the amount of digested water sprayed per unit time The amount of water is not flat and the coke loaded on the fire truck collapses, so that the level is more than the water pressure that can be flattened, and the amount of blowing into the upper side of the coke is excessively larger than the amount deposited into the coke. It is preferable to make it so that it does not overflow to the outside of a fire truck.

That is, the higher the amount of extinguishing water sprayed in a short time, the more effective it is to flatten the coke level, but if too much of the extinguishing water is injected, it may overflow to the outside of the fire extinguisher or contain excessive water in the coke, The amount of sprinkling sprayed and the time of spraying should be set so that the proper extinguishing water can be sprayed according to the equipment conditions and coke amount.

After the watering is completed, the level of digestive water is preferably equal to or slightly higher than the leveled coke level. If the level of the digestive water is too low, the coke of the upper side may not be in sufficient contact with the digestive water, so This is because there is a risk that the digestion is not enough.

When the digestion water injection process is completed as described above, the state is maintained for a certain time, which is to ensure that the entire coke is in a state of being deposited in the digestive water for a time sufficient to extinguish the coke, this time is too much As such, they can be set appropriately for each facility characteristic.

Subsequently, the step of discharging the digestive water is performed quickly, and it is preferable that the point of determining the extinguishing water discharging step is a point in which the coke temperature drops to approximately 150 to 200 ° C. Since the loaded coke was kept in contact with the extinguishing water at about the same time, the moisture contained in the coke can be managed at about the same level after the extinguishing water is discharged, and the coke quality can be improved.

Figure 4 is a schematic view showing a fire extinguishing device according to the present invention as a schematic diagram showing a fire extinguishing device that is capable of injecting and discharging the extinguishing water by the extinguishing method of the present invention by modifying the fire truck 100 shown in FIG. The general configuration of 1) is the same as the conventional one, and the detailed description thereof will be omitted by applying the reference numerals shown in FIG. 1 as it is.

Fire extinguisher 1 of the present invention is equipped with a fire extinguishing water level detection sensor 10 to detect when the extinguishing water is filled up to the appropriate height of the vertical structure wall 136, drainage outside the bottom of the gate 140 The auxiliary gate 20 may be installed to block the hole 146.

First, the digestive water level sensor 10 is sufficient to detect the level of the liquid component, for example, a level sense using buoyancy can be used, the height of the digestive water level sensor 10 is concentrated by the concentrated water It is preferred to be set higher than the level of coke to be flattened, so that all of the coke can be deposited by the digestive water.

The auxiliary gate 20 is formed in a rectangular plate shape so that an upper end thereof is rotatably connected to the gate 140 via a pin 22, and when the auxiliary gate 20 is in close contact with the gate 140, the gate ( Blocking the drain hole 146 formed in the 140 is to block the discharge of the digestive water.

In addition, the auxiliary gate 20 is configured to rotate through the pin 22 by the pneumatic cylinder 30, the pneumatic cylinder 30 is the gate 140 through the pin (32) It is rotatably connected to the action link 144, the rod 34 of the pneumatic cylinder 30 is connected to the auxiliary gate 20, so that when the rod 34 of the pneumatic cylinder 30 moves forward, the drain hole 146 When the auxiliary gate 20 rotates in the direction of opening) and the rod 34 of the pneumatic cylinder 30 moves backward, the auxiliary gate 20 rotates in the direction of blocking the drain hole 146.

The rod 34 may be directly connected to the auxiliary gate 20, but as shown in FIG. 4, it is preferable to connect the rod 34 to the auxiliary gate 20 through the buffer means 40. Is inserted into the shock absorbing body 42 forming the shock absorbing means 40, the spring 44 embedded in the shock absorbing body 42 provides an elastic force in the direction of advancing the rod 34, the shock absorbing body A connecting rod 46 extending from 42 is connected to the auxiliary gate 20 via the pin 48. That is, when the rod 34 moves backward, the auxiliary gate 20 is in close contact with the gate 140 at an appropriate pressure by compressing the spring 44 so that the discharge of the digestive water through the drain hole 146 is stable. This can be prevented.

Then, the water level sensor 10 and the pneumatic cylinder 30 is preferably connected to a separate control unit for controlling the fire extinguishing equipment to be controlled therefrom, and, if necessary, the water level sensor 10 When digestion water is detected in the stop the extinguishing water injection and at the same time equipped with a timer that operates at the same time to operate the pneumatic cylinder 30 may be to discharge the extinguishing water by opening the auxiliary gate (20).

That is, when the first initial sprinkling (which may be constant or gradually increased), the second concentrated spraying, the coke level is flattened by the second concentrated spraying, The level gradually rises.

When the digestive water level rises to the sensor 10 and the sensor 10 detects the digested water, extinguishing water spraying (second concentrated spraying) is terminated and the state is maintained for a certain time.

As the coke is deposited in the extinguishing water for a predetermined time, the coke is completely extinguished, and when the time is over, the pneumatic cylinder 30 moves forward to open the auxiliary gate 20 to extinguish through the drain hole 146. The extinguishing water of the car 1 is drained to the outside.

According to the wet extinguishing method of the red coke according to the present invention and the fire extinguishing apparatus used therein, as described above, by performing the initial initial water spraying a small amount of digestive water to the coke for a certain time, effectively prevents the coke explosion phenomenon, By performing the second concentrated spraying spraying a large amount of digestive water into the coke for a certain time, the uneven coke level is flattened so that the entire coke is deposited in the digestive water so that the same digestive state is achieved. By draining to the water contained in the coke can be managed in a constant state it is possible to improve the coke quality.

Claims (4)

In the wet fire extinguishing method of extinguishing coke by distilling the coking coke in the coke oven by distilling the glowing coke loaded in the fire extinguisher by extruding by the extruder. After the initial initial spraying for a certain time at a flow rate to prevent coke explosion, After the first initial spraying, the second concentrated spraying is carried out for a predetermined time at a flow rate at which the coke level is flattened by the spraying pressure. After the second concentrated spraying, the coke is kept in the digestive water for a certain period of time to maintain deposition, Wet fire extinguishing method of red coke characterized in that the drainage is performed immediately after the deposition. The method of claim 1, Wet digestion method of red coke characterized in that the amount of extinguishing water sprayed from the first initial water spray gradually increases with time. The fire extinguisher moves along the rail 110 passing through the coke oven for discharging the coke and the fire extinguishing tower, and connected to a plurality of links 142 and 144 in the lower portion of the fire truck. In the wet fire extinguishing device having a gate 140 to discharge the coke by being formed, a plurality of drain holes 146 for discharging the digestion water in the gate 140, A fire extinguishing water level detection sensor (10) mounted on the fire extinguishing vehicle (1) to detect that the level of extinguishing water reaches a set height; An auxiliary gate 20 rotatably mounted on the outer side of the gate 140 via a pin 22 to open and close the drain hole 146 formed in the gate 140; And, And a cylinder (30) mounted to the link (144) and connected to the auxiliary gate (20) to provide opening and closing power of the auxiliary gate (20). The method of claim 3, It has a buffer body 42 for slidingly receiving the end of the rod 34 of the pneumatic cylinder 30, the spring 44 embedded in the buffer body 42 in the direction in which the rod 34 is advancing And a shock absorbing means (40) for providing an elastic force and allowing the connection table (46) extending from the shock absorbing body (42) to be connected to the auxiliary gate (20).