KR100605520B1 - tar reaction and gas generation increasing device in coke oven - Google Patents

Abstract

The present invention relates to a tar reaction and gas generation increasing apparatus for minimizing the inflow of air into the oven by increasing the QI component in coal tar, a by-product of coke oven dry liquor, and increasing the amount of late dry gas generated. PLC 23 for receiving dry water information from control system 24 and outputting control variables to each device, tank 21-1 for storing tar, and multistage centrifugal pump 21-2 for pumping tar. And a tar inlet valve 21-3, wherein the tar inlet valve 21-3 is controlled by receiving a command from the PLC 23, and conveys tar to the inside of the carbonization chamber; And, the nozzle 25 for spraying the tar in the pipe is mounted, the nozzle 25 is so that the tar and the rotary part 22-1 causing the rotation of the tar at the inlet so that the tar with pressure is sprayed in the mist form It consists of parts 22-2 By protruding to the refractory surface at the farthest upper part of the pipe, the quality of pitch products can be improved by artificially increasing the QI content of the tar, and the time to open the riser pipe is minimized by securing enough gas generated at the end of dry distillation. Pollution problems and heat emissions from air emissions are minimized

       Coke Oven, Tar, QI, BTX

Description

     Tar reaction and gas generation increasing device in coke oven}

       1 is a cross-sectional view illustrating an outline of a coke oven carbonization chamber and a combustion chamber.

       Fig. 2 is a view showing the discharge of gas generated at the end of dry distillation.

       3 is a view of a coke oven applied to the present invention.

       Figure 4 is an operating situation of the end of the coke dry water applying the present invention.

       5 is a sectional view of a nozzle;

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

       DESCRIPTION OF SYMBOLS 1 Charging coal 2 Gasway 3 Generated gas 4 Uprising cap

       5: chemical conversion process (gas purification process) 6: fuel gas supply piping

       7 gas collecting tube (GC Main) 8 rising tube 9 damper (Damper)

       The present invention relates to an apparatus for increasing tar reaction and gas generation in a coke oven, and in particular, increases the QI component in coal tar, a by-product of coke oven dry liquor, and increases the amount of gas generated during the last dry liquor, thereby introducing air into the oven. It relates to a tar reaction and gas generation increasing device to minimize.

        1 is a cross-sectional view showing an outline of a coke oven carbonization chamber and a combustion chamber, and FIG. 2 is a view illustrating the discharge of gas generated at the end of dry distillation.

        Tar is a major by-product of coke drying process.Tar, composed of various materials, is secondary processed to produce various kinds of products.The material that accounts for the largest proportion of the products is pitch, which is the raw material of electrode in aluminum smelting plant. Used as.

       The most important factor in determining the quality of the pitch is QI in tar, which is appropriate to be over 3%, but the QI content of tar in pure coke ovens is not easy to exceed 3%. The method of adding QI component is chosen.

In addition, if the content of the pitch in the quinoline solvent insoluble content is low, the smelting electrode sticks poor quality, which is a major complaint of the demand because the QI content is lower than the required value of the tar processing process.

       The amount of COG generated during the dry distillation in the coke oven is difficult to control the pressure inside the carbonization chamber because the amount varies depending on the evaporation time. Especially, at the end of the dry distillation, the pressure in the furnace decreases due to the rapid decrease of the gas generation. Since it is a condition to inhale a large amount, it occurs in the state of opening the riser 4 and blocking the gas pipe to the chemical conversion process 9 as shown in FIGS. 1 and 2 before extrusion about 3 to 4 hours. Dissipate a small amount of gas into the atmosphere (3-e).

       When operating without dissipation, the amount of gas generated is small, so air is sucked into the carbonization chamber and causes damage to the furnace, and according to the dissipation of gas, a large amount of heat is released into the atmosphere, and it also acts as a cause of pollution.

       Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and aims at artificially increasing QI in tar and increasing the amount of gas produced during the last dry distillation.

       Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment according to the present invention.

       Embodiments of the present tar reaction and gas generation increasing device,

       PLC 23 for receiving dry water information from the coke operating control system 24 and outputting control variables to each device, a tank 21-1 for storing tar, and a multi-stage centrifugal pump for pumping tar. 2) and a tar inlet valve 21-3, wherein the tar inlet valve 21-3 is controlled by receiving a command from the PLC 23, and conveys tar to the inside of the carbonization chamber 22 And a nozzle 25 for injecting tar from the pipe, and the nozzle 25 has a rotary part 22-1 and a tar that causes rotation of the tar at the inlet so that the tar with pressure is injected into the mist form. It is preferably composed of a portion 22-2 to spread so as to protrude on the refractory surface at the uppermost part farthest from the riser.

       FIG. 3 is a view of a coke oven applied to the present invention, FIG. 4 is a view illustrating an operation situation of the last stage of coke dry water applying the present invention, and FIG. 5 is a cross-sectional view illustrating a nozzle.

       PLC 23 for receiving dry water information from the coke operating control system 24 and providing control variables to each device, a tank 21-1 for storing tar, and a multistage centrifugal pump 21-2 for pumping tar. , The tar injection valve 21-3 and the tar injection valve 21-3 are controlled by receiving a command from the PLC 23. There is a pipe 22 for transferring tar to the inside of the carbonization chamber and a nozzle 25 for spraying tar from the pipe. The nozzles project on the refractory side at the uppermost side away from the riser. The nozzle is composed of a portion 22-1 for causing tar to rotate at the inlet and a portion 22-2 for spreading the tar so that the pressurized tar can be sprayed in the form of a mist.

       Tar during expansion of the dry gas, tar is injected into the carbonization chamber (25) at the time of opening the riser (4), causing tar to expand in the gaseous state while allowing gas to react in the gasway (2) of the carbonization chamber. By supplying the gas insufficient by the to maintain the pressure in the carbonization chamber above a certain level. The required calories are compensated by the (3-e) calories of the gas which has been dissipated into the existing atmosphere. The injected tar has a volume expansion of 700 to 1,000 times by the temperature of the gasway (2), which causes the tar with increased density to undergo gas phase polymerization reaction (condensation polymerization, crosslinking, etc.). A large amount of QI, which is an important factor for pitch quality, is generated.

       In addition, at the end of dry distillation, the consumption of coking heat is low, so the gasway temperature is high, which promotes the gas phase polymerization reaction, thereby increasing the amount of QI. The determination of the end of dry distillation is informed by the Oven control system 24 currently in operation, and the timing of tar injection and discontinuation is the time when gas is generated from 3 to 4 hours before the end of dry distillation in the tar input system until extrusion is low. Decide

       Due to the decrease of gas generated at the end of dry distillation, the pressure in the carbonization chamber is lowered. As a result, the temperature rise due to the reaction of oxygen in the air and the combustion components (hydrogen, methane, etc.) in the carbonization chamber caused by the thermal shock caused the damage to the furnace. The supply of artificial tar 25 through the present invention is solved by an increase in the pressure inside the furnace due to increased gas generation due to the volume expansion of the tar.

       As described above, according to the present invention, the quality of the pitch product can be improved by artificially increasing the QI content of the tar, and the time for opening the riser is minimized by securing sufficient gas generated at the end of dry distillation, so that the gas is released into the air. Pollution problems and heat emissions from heat are minimized.

Claims (1)

       PLC 23 for receiving dry water information from the coke operating control system 24 and outputting control variables to each device, a tank 21-1 for storing tar, and a multi-stage centrifugal pump for pumping tar. 2) and a tar inlet valve 21-3, wherein the tar inlet valve 21-3 is controlled by receiving a command from the PLC 23, and conveys tar to the inside of the carbonization chamber 22 And a nozzle 25 for injecting tar from the pipe, and the nozzle 25 has a rotary part 22-1 and a tar that causes rotation of the tar at the inlet so that the tar with pressure is injected into the mist form. A tar reaction and gas generation increasing apparatus, comprising: a portion (22-2) for spreading, protruding to the refractory surface at the uppermost side of the riser.

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