JPS62161883A - Burning off system for carbon attached to carbonizing chamber in coke oven - Google Patents

Abstract

PURPOSE:To provide the titled system in which jet nozzle is provided in such a manner as to be parallel to the sidewall surface of carbonizing chamber and lance reaching to oxygen-contg. gas pressure source is inserted into the carbonizing chamber, thus enabling the carbon attached to the sidewall to be rapidly and securely removed and damage of the joints to be prevented by simple means. CONSTITUTION:At least one lance 1 carrying at least one jet nozzle 2 and reaching to oxygen-contg. gas pressure source 14 is held, through a guide 7, on a base mount 6 traveling, by the action of a wheel 12 and driving source, on a rail 5 installed on the upper part of a carbonizing chamber 4. This lance 1 is inserted into a charge hole 11 of the carbonizing chamber 4 by drive of a winding drum 10 through a guide wheel 8 and wire 9. An oxygen-contg. gas is made to whirl and agitate in the chamber 4 while injecting said high-speed gas at <=20m/sec through the nozzle 2 so provided that the jet direction in the chamber 4 is almost parallel to the sidewall surface of the chamber, thus removing the attached carbon.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a device for removing carbon deposited inside a coke oven carbonization chamber.

(Prior Art) Carbon is firmly attached to each part of a coke oven carbonization chamber during carbonization of one coal. If left unattended, carbon adhering to the furnace wall surface will not only make it difficult to push out the coke, but also cause a decrease in the effective volume of the carbonization chamber and a decrease in the thermal conductivity of the furnace wall, so periodic removal work is necessary. . Also, the top surface of the carbonization chamber (ceiling surface)
If left unattended, it will be difficult to level the coal evenly during one coal charge, so periodic removal work is still necessary. Furthermore, carbon adhering to the base of the riser pipe and the riser pipe portion must be removed periodically because if left untreated, it will be difficult for the generated gas to escape. Therefore, conventionally, in order to remove these carbons, for example, Japanese Patent Publication No. 60-23
As described in Publication No. 48, it is common to use a spear-shaped jig with a sharp tip and a length of 5 to 6 m to manually push it down from the top of the furnace. However, this method has the basic disadvantage that the carbon layer completely peels off from the furnace wall, impairing the sealing function of carbon at the furnace wall joints. There are drawbacks such as the production work stopping during the push-off work. Further, it is difficult to push off carbon adhering to the upper surface (ceiling surface) of the carbonization chamber and the upper surface of the furnace wall because the upper furnace empty space becomes a blind spot. As an alternative to this operation, there is a known technique in which the charging port and riser pipe of the carbonization chamber are opened one hour before extrusion, and air is introduced into the carbonization chamber through natural ventilation to burn and remove adhering carbon.

However, 1 hour before extrusion, it was still 3 to 5 Nm 3/
Hr, Coatt (at 4800 kcat/N
m') coke oven gas is being generated, and if the coking chamber is opened at this point, the coke oven gas will be released from the riser pipe along with the introduced air, which is uneconomical, and it is also necessary to introduce air. The coal charging port is cooled, causing damage due to spalling, etc. Furthermore, carbon adhering to the base of the riser pipe and the riser riser pipe is removed by combustion with the air introduced from the above-mentioned charging port, and before coke is pushed out, the leveling cap is opened to introduce air and burn it. Alternatively, the rising pipe is mechanically pushed down from the top of the riser pipe, but in either case, the coke oven soot generated during this time is released.

(Problems to be Solved by the Invention) The present invention removes carbon adhering to various parts of the coke oven carbonization chamber without cooling the carbonization chamber locally, without labor-saving, and without interfering with production work. Another object of the present invention is to provide a removing device capable of burning and removing excess adhered carbon while leaving behind the adhered carbon necessary for sealing brick joints.

(Determined Means to Solve the Problem) When removing carbon adhering to the wall surface of the coke oven carbonization chamber, the inventors opened a part of the coke oven chamber and inserted at least one injection lance to inject oxygen or oxygen into the coke oven carbonization chamber. By injecting a gas containing , swirling and stirring the gas along the wall of the carbonization chamber, carbine adhering to the entire surface of the wall of the carbonization chamber can be effectively burned and removed! When injecting this gas, by selecting the conditions of the jet flow that swirls and stirs inside the carbonization chamber, it is possible to prevent the soot concentration from the chimney when charging the coal without impairing the sealing properties of the joints of adhering carbon, which is important in the carbonization chamber. We have discovered that it is possible to maintain the extrusion current necessary for heating the whole room and local areas below a certain value while keeping the current below a certain value.

The present invention was made based on these findings, and enables labor saving by automation and simplification of processes and equipment, avoids heavy labor at high temperatures, and provides reliable combustion removal of excessively adhered carbine. The present invention provides an extremely superior combustion removal device that has never been seen before. .

The apparatus for combustion removal of carpan adhering to a coke oven carbonization chamber of the present invention has at least one injection nozzle, communicates with a gas pressure source containing oxygen, is supported by a support means, and has at least one lance. The injection nozzle is inserted into the carbonization chamber, and the injection nozzle is arranged on the lance so that when the lance is inserted into the carbonization chamber, the injection direction in the carbonization chamber is approximately parallel to the side wall surface of the carbonization chamber. It is something.

According to the device of the present invention, the injection direction of the injection nozzle of the insertion lance is arranged so as to be substantially parallel to the side wall surface of the carbonization chamber, so that the oxygen-containing gas injected from the nozzle is directed to the side wall surface. The carbon adhering to the wall surface of the carbonization chamber while causing a swirling air flow in the carbonization chamber is brought into contact with the carbonization chamber and burnt and removed.The jet stream is not applied directly to the wall surface to peel off the adhered carbon, so the carbonization of the wall substrate, Excessive carbon adhering to the wall surface is uniformly burned away without damaging the furnace wall, leaving behind the adhering carbon necessary for the sealing function of the furnace wall joint.

According to the present invention, the lance is preferably inserted from the top of the carbonization chamber, but it can also be inserted from the side. The injection nozzle may be arranged so that the injection direction of the injection nozzle is determined as described above depending on the insertion posture of the lance.

The lance is preferably supported by a carriage that moves on the upper surface of the carbonization chamber, an extruder adjacent to the side of the carbonization chamber, a coke guide car, or a carriage that is movably disposed separately. However, various other support methods are possible.

Furthermore, in the apparatus of the present invention, a part of the swirling flow of oxygen-containing gas injected into the carbonization chamber may be discharged or sucked from the carbonization chamber and introduced into a gas pressure source communicating with the lance for circulation use. This facilitates swirling and stirring of the airflow ejected from the nozzle, and also makes it possible to increase the temperature of the airflow ejected from the nozzle.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The combustion removal device of the present invention will be described in detail below based on the embodiments shown in the drawings.

FIG. 1 shows a schematic diagram of a lance used for combustion removal according to the present invention, and FIG. 2 shows a sectional view of the combustion removal apparatus according to the present invention. FIG. 3 shows a sectional view of another embodiment of the combustion removal device according to the invention.

First, a lance 1 used for combustion removal according to the present invention is made of a cylindrical body made of, for example, a steel pipe or a refractory material, and injection nozzles 2 are provided at appropriate intervals from the center to the tip of the cylindrical body. As shown in (^), a plurality of injection nozzles 2 may be provided, with the one provided in the center of the cylinder pointing upwards and the one provided at the tip pointing downwards, or (b), (c), (
Use the one shown in d), or use a suitable combination of downward, upward, and parallel ones. In particular, as shown in (d), an auxiliary injection nozzle 3 or a slit is provided on the proximal end side of the lance 1 so as to burn off the carton adhering to the charging hole 11 (see Fig. 2), which will be described later. (not shown)
A small amount of gas may be injected by drilling a hole. This lance 1
is held via a lance guide 7 on a base 6 which runs on a rail 5 laid in the upper part of the carbonization chamber 4 by a vehicle F412 and a drive source (not shown). The lance 1 held on the base 6 is moved to the charging hole 11 of the carbonization chamber 4 by driving a winding citrus 10 via a guide foil 8 and a wire 9.
is guided down and held in a predetermined position. Further, the lance 1 is connected to a gas pressure source 14 such as a blower or a compressor via a flexible hose (not shown) and a supply pipe 13 that follow the rise and fall. This gas is composed of oxygen, air, or a mixture thereof, and may be any gas containing oxygen.If the temperature drop in the carbonization chamber 4 is to be suppressed, enrichment with oxygen is recommended. good. In the present invention, the means for inserting the lance 1 is not limited to the one using the lance guide 7 and the take-up citrus 10, etc., but also the normally used grasping and raising/lowering, for example, the advancing/retracting device, the rotating raising/lowering method, or the method using a simple hanging method. But it's okay. Furthermore, the trolley may also be of a fixed self-propelled type or may be towed by a loading vehicle.

The lance base is inserted so that the projecting direction of the injection nozzle 2 provided on the lance 1 is approximately parallel to the side wall surface of the carbonization chamber 4.
The shape of the nozzle 2 may be any shape as long as it can obtain a jetting flow velocity, and may be, for example, an oval or a flat shape, and may be appropriately used without departing from the technical concept of the present invention.

In order to burn off the adhering carbon in the carbonization chamber 4 using the device configured in this way, for example, the charging hole 11 of the carbonization chamber 4 must be
At least one of the lances 1 is opened from the charging hole 11 into the carbonization chamber 4, and the number corresponds to the charging hole 11 in which the lance 1 is opened, and the number is 1/4 to 3 with respect to the depth of the carbonization chamber 4. Insert until about /4. Next, oxygen or a gas containing oxygen is injected at a high speed of 20 m/sec or more from the nozzle 2 which is injected substantially parallel to the side wall surface of the carbonization chamber 4, and the gas is swirled inside the carbonization chamber 4.
Stir. If this flow rate is less than 20 m/sec, the removal efficiency will decrease or vary. For these reasons, high-speed injection of gas is carried out in the carbonization chamber 4 as shown in Figure 3.
It varies slightly depending on the furnace etc. Therefore, the π index ρUot2 μ is calculated as follows: P: gas density μ: viscosity coefficient Uo: jet flow velocity t: furnace width L: variable the flow velocity of the jet gas so that the index value expressed as the effective removal range becomes 0.6 or more This makes swirling and stirring appropriate, which is preferable from the viewpoint of combustion removal effect and stabilization of the temperature in the carbonization chamber. Furthermore, as shown in Fig. 4, the lance l inserted from the charging hole 11 also injects gas starting from the upper limit of the carbonization chamber 4 and at the middle and lower limits, depending on the distribution or amount of carbon deposited in the carbonization chamber 4. If the jet is moved up and down at the same time, favorable results can be obtained due to the swirling flow of the jet flow.

Note that the charging hole 11 is also opened in the carbonization chamber section, which is opened to create a swirling and stirring flow of the gas injected into the carbonization chamber 4, or a part of the end wall of either the extrusion or discharge side is bored. Alternatively, the riser route may simply be used. Moreover, as shown in FIG. 5, the charging hole 1 into which the lance 1 is not inserted is
By connecting the exhaust gas guiding duct 15 to 1 and connecting the other end to the suction side of a blower, for example, a part of the exhaust gas can be mixed with the supply gas (oxygen or air or a mixture thereof). It is possible to promote swirling and agitation of the fluid ejected from the nozzle 2 throughout the entire interior of the carbonization chamber 4, and to increase the temperature of the ejected fluid, thereby obtaining favorable results.

The above describes an example in which the lance l is inserted through the charging hole 11, which is an open part on the furnace, but the insertion position is not limited to this. It may be installed at the top. Alternatively, a dedicated insertion opening may be provided in the furnace lid and a lance may be inserted into this opening.

In either case, similar results can be obtained by arranging the nozzle 2 so as to eject the supply gas parallel to the wall surface of the carbonization chamber. These lances 1 may be connected to piping connected to the gas pressure source 14 by, for example, a coupler, as necessary.

FIG. 6 shows another embodiment of the present invention. In this embodiment, two upper and lower lances 21 installed on a coke guide car 23 are inserted into the carbonization chamber 26 after extruding coke to blow out high-speed air. The riser pipe releases carbon dioxide combustion gas. The lance is inserted into the carbonization chamber via a lance insertion sealing plate 22, and a nozzle 25 is provided protruding from the tip and middle of the lance. Regarding the protruding direction and shape of the nozzle, those shown in FIG. 7 can be used, but in both cases, a swirling agitation flow is formed along the side wall of the carbonization chamber.

Preferably, some of the nozzles protrude at a constant slope with respect to the bottom of the carbonization chamber, so that no dead space is created within the carbonization chamber.

Furthermore, instead of applying pressure only to the coke guide car side, if necessary, a lance is inserted into the carbonization chamber from the extruder 28 side as well, as shown by the dotted line in Fig. 6, and high-speed air is blown out in the same way. It is more advantageous to utilize the impact stirring effect by opposing the jet flow ejected from the lance.

〔Effect of the invention〕

As described above, by using the combustion removal device according to the present invention, it is possible to remove adhering carbon by a simple means, and moreover, it is possible to remove it quickly and reliably, without causing any hindrance to production operations.

In addition, this device is an excellent combustion removal device that can prevent damage to the joints, which are the most important part of a carbonization chamber, by suppressing cooling of the entire or localized portion of the carbonization chamber, and can also be expected to have a sufficient energy saving effect.

Fig. 2 shows a sectional view of the combustion removal device according to the present invention, Fig. 3 shows the relationship between the π index and the temperature of the furnace wall of the coking chamber, Fig. 4 shows an example of the lance operation, and Fig. Figure 5 shows a case where a plurality of lances and exhaust gas guiding ducts are provided. FIG. 6 is a top view showing another embodiment of the device of the present invention, and FIGS. 7(a), (b), (c), and (d) show the injection nozzle shape of the lance used in the embodiment of FIG. 1.21...Lance 2,25...Nostle 4,26...Carbonization chamber
6... Base 7... Lanskite 7a
... Stotsuno 4' -10 ... Winding citram
11...Charging hole 13...Supply pipe 14
... Gas pressure source 15 ... Induction duct 22 ... Seal plate for lance insertion (equipped with cork guide r car > 23 ... Coke guide car 24 ... Near blower 27 ... Rising pipe 28 ... Extruder=T
'1 Agent Teruo Taniyama (.

Figure 1 (α) (b) (C) (d) Figure 2 Figure 3 Figure 4 mouth*! 4+e-Measurement

Claims (1)

[Scope of Claims] 1. Supported by a support means having at least one injection nozzle and communicating with a gas pressure source containing oxygen;
At least one lance is inserted into the carbonization chamber, and the injection nozzle is arranged on the lance so that when the lance is inserted into the carbonization chamber, the injection direction in the carbonization chamber is approximately parallel to the side wall surface of the carbonization chamber. A device for burning and removing carbon deposited in a coke oven carbonization chamber. 2. Supported by a support means having at least one injection nozzle and communicating with a gas pressure source containing oxygen;
At least one lance is inserted into the carbonization chamber, and the injection nozzle is arranged on the lance so that when the lance is inserted into the carbonization chamber, the injection direction in the carbonization chamber is approximately parallel to the side wall surface of the carbonization chamber. A device for burning carbon deposited in a coke oven carbonization chamber, characterized in that the carbonization chamber is further provided with an induction port for taking out a part of the gas in the carbonization chamber, and the induction port is connected to a gas pressure source that communicates with a lance.