KR100797955B1 - Apparatus for removing tar contained in cokes oven gas, using an electrostatic induction operation - Google Patents

Abstract

The present invention utilizes an electrostatic induction effect that enables automatic cleaning without deformation and explosion while easily removing impurities such as tar in COG, which is a heat source used in an annealing process of steel mill, by using strong corona discharge. It relates to a tar removal device of coke oven gas.

To this end, the present invention is a power supply unit 60 for generating and supplying a DC high pressure, a tar dust collecting unit 70 for attaching the tar contained in the COG using the electrostatic induction effect caused by the supplied power, and attached thereto Tar removal unit of the coke oven gas using an electrostatic induction action, characterized in that it is composed of a tar removal unit 80 for removing the tar, and a tar discharge unit 90 dissolving and discharging the tar discharged from the water. To provide.

As described above, the present invention prevents deformation of the discharge electrode and the cylindrical dust collecting plate while removing tar by the strong corona discharge by electrostatic induction, and enables cleaning of the tar attached to the dust collecting plate during operation, and power supply and COG during operation Blocking and automatically purging with nitrogen has the effect of improving safety.

COG, tar, corona, dust collector, discharge electrode, circular brush, water tank, nitrogen

Description

Tar removal apparatus for coke oven gas using electrostatic induction action {APPARATUS FOR REMOVING TAR CONTAINED IN COKES OVEN GAS, USING AN ELECTROSTATIC INDUCTION OPERATION}

1 is a schematic diagram schematically showing a conventional filter type tar removing device;

2 is an overall configuration diagram of the tar removal apparatus of the coke oven gas using the electrostatic induction action according to the present invention;

Figure 3 is a detailed view of the body of the tar removal apparatus of the coke oven gas using the electrostatic induction action according to the present invention;

4 is an exploded perspective view of a cylindrical dust collecting plate and a discharge electrode constituting the tar removal apparatus of the coke oven gas using the electrostatic induction action according to the present invention;

5 is an exploded perspective view of a screw jack and a circular brush of the tar removal apparatus of the coke oven gas using the electrostatic induction action according to the present invention;

6 is a functional diagram of the tar removal apparatus of the coke oven gas using the electrostatic induction action according to the present invention;

7 is a process flow chart for the automatic cleaning of the tar removal apparatus of the coke oven gas using the electrostatic induction action according to the present invention;

8 is a process flow chart for preventing the explosion of the tar removal apparatus of the coke oven gas using the electrostatic induction action according to the present invention.

♣ Explanation of symbols for main part of drawing ♣

4: DC high voltage generator 31: upper cap 33: electrode plate 60: power supply

20: Dust collector case 1: Titanium discharge electrode 32: Insulation plate 2: Cylindrical dust collector

70: tar dust collecting part 27: circular brush 37: screw shaft 25: drive motor

80: tar removal portion 21: water tank 90: tar discharge portion

The present invention relates to a tar removal apparatus of coke oven gas using an electrostatic induction action, and more particularly, a strong corona discharge of impurities such as tar in COG (Cokes Oven Gas), which is a heat source used in an annealing process of cold rolling mills. The present invention relates to a tar removal apparatus for coke oven gas using an electrostatic induction function, which is capable of easily removing impurities in COG, but does not cause deformation and explosion, and enables automatic cleaning.

In general, COG (coke oven gas) is supplied to the burner to increase the temperature in the annealing furnace to maintain a proper temperature. In order to remove impurities and tar in the COG in the process, as shown in FIG. Tar removal device with built-in filter is used.

Since the conventional apparatus uses a filter, a pressure drop occurs and as time passes, a pressure drop occurs rapidly due to the collected impurities inside the filter blocking the filter, causing a explosion due to a backfire in the burner due to a drop in COG supply. In addition, the filter built-in type is required to block the COG or bypass (By-Pass) when cleaning the filter, so that it is sucked into the burner without tar removed, causing the blockage of the burner, pipes and valves.

In addition, in recent years, a type of spraying water periodically to the filter has been suggested to enable cleaning during operation, but this also increases the amount of water in the COG to increase corrosion of pipes, valves, and burners, and causes poor ignition due to moisture. Due to the uneven temperature in the annealing furnace, it has a huge impact on the product quality and causes the life of pipes, valves and burners to be reduced.

More specifically, in recent years, in order to remove dust in the dust collector, a technique of collecting dust by a strong discharge force by applying a power by installing a plate type electrode plate and a cylindrical dust collector plate has been proposed. There is a problem of deformation of the electrode plate and the cylindrical dust collecting plate by the force of, and it does not consider the explosion risk at the time of discharge due to the gas and oxygen in the dust, and also removes the dust attached to the cylindrical dust collecting plate automatically There is a problem that can not be applied because there is no device to remove.

In order to solve the above problems, the present invention is to install a cylindrical dust collector and a discharge electrode in the container to apply a direct current high pressure to the discharge electrode to pass the COG therein to forcibly attach the tar to the cylindrical dust collector by a strong corona discharge action. It is an object of the present invention to provide a tar removal apparatus of coke oven gas using an electrostatic induction action to automatically remove tar and supply clean COG to the burner safely and efficiently.

In order to achieve the above object, the present invention provides a power supply unit for generating and supplying a DC high pressure, a tar dust collecting unit for attaching the tar contained in the COG using the electrostatic induction effect caused by the supplied power, and attached thereto The tar removal unit for removing the tar is provided, and the tar discharge unit for discharging the tar discharged from it by dissolving in water to provide a tar removal device of the coke oven gas using an electrostatic induction action.

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

2 is an overall configuration diagram of the tar removal apparatus of the coke oven gas using the electrostatic induction action according to the present invention, Figure 3 is a detailed view of the body of the tar removal apparatus of the coke oven gas using the electrostatic induction action according to the present invention, 4 is an exploded perspective view of the cylindrical dust collecting plate and the discharge electrode constituting the tar removal device of the coke oven gas using the electrostatic induction action according to the present invention, Figure 5 is a tar removal device of the coke oven gas using the electrostatic induction action according to the present invention. Is an exploded perspective view of a screw jack and a circular brush.

As shown in FIG. 2, the power supply unit 60 is insulated from the DC high voltage generator 4 with the insulator 3 and connected to the power cable 19, for insulation from the upper cap 31. It is connected to the electrode plate 33 through the insulator 3 like insulator.                     

The cylindrical dust collecting plate 2 made of a steel material constituting the tar dust collecting portion 70 for attaching the tar in the COG by applying a voltage from the power supply 60 is bolted to the upper cap 31, the surface is flat And, the surface is opened with four grooves so that the tar removal portion 80 in the longitudinal direction to operate.

An insulating plate 32 is installed between the upper cap 31 and the dust collecting plate 2, and an electrode plate fixing hole 47 is processed at the lower portion thereof so that the electrode plate 33 is bolted to the insulating plate 32. .

The electrode plate 33 is twelve rings 34 are welded and attached so that the twelve titanium discharge electrodes 1 can be connected, and the titanium discharge electrode 1 is ring-shaped so as to be connected to the electrode plate ring 34. The upper part is formed.

In addition, a plurality of iron pieces 35 are attached to the titanium discharge electrode 1 so that a corona discharge 30 is easily generated, and a weight piece 18 is connected to the end of the discharge electrode 1 by a corona discharge 30. When the discharge electrode (1) is vibrated serves to hold the center.

There is a cleaning circular brush 27 on the outer wall of the cylindrical dust collecting plate 2 to remove the tar attached to the cylindrical dust collecting plate 2 constituting the tar catching portion having the above configuration, the circular brush fixing portion 52 The bearing 49 is fixed therein and the lower end of the screw shaft 37 is connected to enable self-rotation. At this time, the washer 50 and the nut 51 are used to fix the bearing 49.

The screw shaft 37 is connected to the screw jack 26 through the central oil seal 38 of the upper cap 31, the oil chamber 38 is airtight of the gas inside the device according to the present invention In order to maintain the seal cap (Seal Cap) 44 is installed inside.

A drive motor 25 is attached to the screw jack 26 for operation, and a groove is formed in the cleaning circular brush 27 to mount each brush piece 28, and the brush piece is provided in the groove portion. Insert (28) and bolt it with the top and bottom stoppers (45).

The tar discharge part 90 is connected to the lower discharge port 20a of the dust collector case 20 accommodating the tar catching part and the tar removing part 80 having the above configuration, and the tar discharge part 90 is provided. The configuration of the dust collector case 20, the lower outlet 20a and the connection of the water tank 21, the manual water supply valve 13 is connected to the water tank 21 to circulate the water, the drain of water and COG The seal port 7 is connected to the water tank 21 to maintain airtightness.

In addition, the dust collector case 20 is provided with an automatic COG supply valve 11 and an automatic COG discharge valve 24, and an automatic COG bypass valve 9 is provided between the supply valve 11 and the discharge valve 24. In the upper part of the dust collector case 20, two nitrogen automatic discharge valves 10 are installed, and an oxygen detector 22 is provided.

Nitrogen automatic purge valve 12 is installed on the side of the water tank, the control panel 8 is installed to operate the various valves, power and detectors, the tar removal device of the coke oven gas using the electrostatic induction action according to the present invention Will be activated automatically.

Hereinafter, the operation of the present invention will be described in detail.                     

6 is an operation of the tar removal device of the coke oven gas using the electrostatic induction action according to the invention, Figure 7 is a process flow chart for the automatic cleaning of the tar removal device of the coke oven gas using the electrostatic induction action according to the present invention. 8 is a process flow diagram for preventing the explosion of the tar removal apparatus of the coke oven gas using the electrostatic induction action according to the present invention.

Based on the above drawings, the operation of the present invention will be described in three steps.

That is, a first step in which tar is removed by electrostatic induction by applying power, a second step in which tar attached to the cylindrical dust collecting plate is automatically removed, and a safety device for preventing explosion during oxygen penetration during operation. Operational configuration of the tar removal apparatus of the coke oven gas using the electrostatic induction action according to the present invention in three steps.

In the first step, when a high voltage DC generated by the DC high voltage generator 4 is applied to the DC high voltage of the negative electrode 1 through the wire cable 19, as shown in FIG. A strong electric field is formed and the collision ionization of the molecules is active, generating positive and negative ions. At this time, purple corona discharge (30) is generated. The charge is divided into a zone 23.

When the gas containing dust passes through the anode space, most of the dust is charged to the negative charge 23, and moves to the cylindrical dust collecting plate 2 by the force of the coulomb.

Then, the dust entering the (+) ionization zone 17 is charged to the (+) charge and is attached to the cylindrical dust collecting plate (2) by the coulomb force, and thus attached to the tar (39) attached to the cylindrical dust collecting plate (2). ) Is a large aggregate is removed by the tar remover 80.

When the strong corona discharge 30 is generated, the discharge electrode 1 is used as a titanium wire to prevent the discharge electrode 1 and the cylindrical dust collecting plate 2 from being deformed by the impact thereof, and the electrode plate 33 is disposed on the upper side thereof. It is connected to the ring (34) of) so that the flow of the corona discharge 30, there is no problem of deformation and the weight piece (18) at the lower end of the discharge electrode (1) to hold the center during the flow of the discharge electrode (1) ) Is fastened.

The second step is to automatically remove the tar attached to the cylindrical dust collecting plate, the tar 39 attached to the cylindrical dust collecting plate 2 periodically according to the time set by the timer 40 installed inside the control panel 8 As the driving motor 25 is driven and the screw jack 26 is rotated to move the cleaning circular brush 27 up and down, each brush piece 28 attached to the inside of the brush 27 is outside the cylindrical dust collecting plate 2. The attached tar 39 is dropped to the bottom.

The up sensor 41 and the down sensor 42 are installed to set the operating section of the upper and lower parts, and the dust generated in the process of operating the cleaning circular brush 27 is a coke oven using the electrostatic induction action according to the present invention. Since the tar removal apparatus of the gas is in operation, it is attached to the cylindrical dust collecting plate 2 again, and only a large chunk of tar 39 that cannot be attached falls to the water tank 21 and is dissolved.

The following is a third step in which a safety device for preventing explosion during operation of oxygen penetrates, and the tar removal device of coke oven gas using the electrostatic induction according to the present invention has an upper cap ( 31. When the oxygen detector 22 detects oxygen as shown in FIG. 8 by the program of the CPU card inside the control panel 8 by detecting the oxygen sensor 22 installed in the upper portion, the control panel 8 ), The magnet conductor (43) installed inside cuts off the power supply, and the COG supply valve (11) and the COG discharge valve (24) are crossed to block the COG gas and the COG bypass valve (9) is opened to the burner. Supplied. The two nitrogen dissipation valves 10 are opened, and the nitrogen purge valve 12 is opened to purge the dust collector of the apparatus according to the present invention, and when the oxygen is normal, the reverse operation is performed.

As described above, the tar removal apparatus of the coke oven gas using the electrostatic induction action according to the present invention to prevent the deformation of the discharge electrode and the cylindrical dust collector plate while removing the tar by a strong corona discharge by the electrostatic induction action, attached to the dust collector plate during operation The tar can be cleaned, and when oxygen is infiltrated during operation, the power and COG are shut off and automatically purged with nitrogen, thereby improving safety.

Claims (6)

Connected to the DC high voltage generator 4, the power cable 19 is connected to the DC high voltage generator 4 and insulated by the insulator (3), and connected to the power cable 19, the upper cap 31 and the insulating plate ( A power supply unit 60 formed of an electrode plate 33 insulated through the substrate 32; A plurality of wire-type titanium discharge electrodes 1 attached to the electrode plate 33 constituting the power supply unit 60 and installed in the dust collector case 20 and the insulating plate are located inside the electrode plate 33. A tar dust collecting part 70 composed of a cylindrical dust collecting plate 2 fixed to 32; A circular brush 27 inserted into an outer circumferential surface of the cylindrical dust collecting plate 2 constituting the tar dust collecting part 70, a screw shaft 37 screwed into a central portion of the circular brush 27, and the screw shaft 37 A tar removal unit (80) formed at an upper portion of the upper cap (31) so as to drive the driving shaft (25) geared with the screw shaft (37); It is composed of a tar discharge portion 90 to infiltrate, dissolve and discharge the tar in the water tank 21 through which the lower part of the dust collector case 20 to collect the tar removed from the tar removing unit 80. Tar removal apparatus of the coke oven gas using the electrostatic induction action. The method of claim 1, The tar dust collecting part 70 includes a nitrogen dissipation valve 10 installed in the upper cap 31 for inflow of nitrogen gas into the dust collector case 20, and an oxygen detector 22 for sensing oxygen. Tar removal apparatus of the coke oven gas using the electrostatic induction action, characterized in that the configuration. The method of claim 1, The tar removal device of the coke oven gas using the electrostatic induction action, characterized in that the weight piece (18) is coupled to the lower portion for maintaining the center of the wire-type titanium discharge electrode (1) constituting the tar dust collector (70). The method of claim 1, Circular brush 27 constituting the tar remover 80 is a tar removal device of the coke oven gas using the electrostatic induction action, characterized in that consisting of a plurality of brush pieces 28 for ease of replacement when brush wear. The method of claim 1, The screw shaft 37 constituting the tar removing unit 80 has an oil chamber 38 embedded in the seal cap 44 installed at the center of the upper cap 31 to maintain the airtightness of the dust collector case 20. Tar removal apparatus of the coke oven gas using the electrostatic induction action, characterized in that passing through. The method of claim 1, The tar discharge unit 90 is a tar removal device of the coke oven gas using the electrostatic induction action, characterized in that it comprises a nitrogen purge valve 12 installed on the top to supply nitrogen to the water tank (21).

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