KR100627449B1 - Apparatus for controlling the moisture of cokes in sintering process - Google Patents

Abstract

The present invention relates to a device for controlling the water in the coke during the production of sintered ore used as the main raw material of the blast furnace (furnace), more specifically the amount of water contained in the different types of coke used as a heat source Since the amount of moisture added to the blended raw materials during the sintering operation is not constant, thereby causing temperature hunting in the sinter layer during the sintering ore firing process, thereby improving the sintering ore to improve the quality and productivity of the sintering It relates to a coke moisture control device in operation.

The present invention, the water removal unit including a blower, a heater and a damper connected in order to supply hot air to the venturi tube connected to the primary separator, and the upper end of the injection pipe connected to the lower side of the venturi tube supplied with hot air Including a nozzle formed to be disposed inside the tube includes a water adding portion for supplying sprayed water to the inside of the separator, wherein the first and second moisture meters respectively disposed on the separator charging and light distribution side is the operating source of the blower, heater and damper It provides a coke moisture control device of the sintering operation, characterized in that it is electrically connected to the control panel to drive them.

Sintered ore, coke, blended raw materials, sintered ore firing process, coke moisture control

Description

Coke Moisture Control System for Sintering Industry {APPARATUS FOR CONTROLLING THE MOISTURE OF COKES IN SINTERING PROCESS}

1 is a block diagram showing a general coke operation according to the prior art as a whole;

Figure 2 is a schematic view showing a coke operation as a whole is applied coke moisture control device of the present invention;

3 is a detailed view of a coke moisture control system to which the coke moisture control device of the present invention is applied;

4 is an overall configuration diagram showing a coke moisture control system of the coke moisture control device according to the present invention;

FIG. 5 is a graph showing a pattern width of temperature change during firing in the sintering layer according to coke included in the blended raw material.

Explanation of symbols on the main parts of the drawings

20 ..... Water removal part 22 ..... Venturi tube

25 ..... blower 25A ... impeller

27 ..... Damper 29 ...... Filter

32 ..... heater 35 ..... steam heater

50 ..... Moisture Addition 52 ..... Water Tank

56 ..... Water Pump 58 ..... Float Valve

80 ..... Control panel 110 .... Coke reservoir

130 ..... Primary sorter

The present invention relates to a device for controlling the water in the coke during the production of sintered ore used as the main raw material of the blast furnace (furnace), more specifically the amount of water contained in the different types of coke used as a heat source Since the amount of moisture added to the blended raw materials during the sintering operation is not constant, thereby causing temperature hunting in the sinter layer during the sintering ore firing process, thereby improving the sintering ore to improve the quality and productivity of the sintering It relates to a coke moisture control device in operation.

In general, the fuel used as a heat source of the sintering operation includes powdered coke and anthracite, and fine sedimentation ponds, which are precipitates generated during coke production, are introduced into a vehicle and collected during coke production. Coke dust (DUST) is also introduced into the vehicle, and then mixed with the blended raw materials in the sintering operation through the coke crushing and sorting process, is used as a heat source in the manufacture of sintered ore.

1 shows a schematic diagram of a coke operation. The coke plant 100 has a sorter 112 and a crusher 116 is located in the lower portion of the coke storage tank 110, the weighing machine for weighing the coke transported to the belt conveyor 118 through the crusher 116 120 is located, the lower portion of the weighing machine 120, the primary sorter 130 is located to sort the coke of a certain size. And, the coke passed through the primary sorter 130 is transported by the belt conveyor 132, introduced into the temporary storage hopper 135 or introduced into the ore bin 150 through the weighing machine 140 and cut out. It is kept in the standby state.

At this time, the crushed and screened coke used as a heat source in the production of sintered ore has the following problems.

Particle size, moisture distribution (%)  division  + 10mm + 8mm + 5mm + 3mm + 1mm + 0.5mm + 0.25mm + 0.125mm -0.125mm Average particle size moisture (%)  CDQ DUST    -    -   1.2   2.1   17.3   40.9   28.3   7.8   2.4   0.95   0.20  D / C DUST    -    -    -   0.1   2.6   16.7   28.7   28.0   23.9   0.35   0.18 hard coal   -   0.2   5.4   10.5   23.4   17.4   18.4   13.0   11.7   1.40     11 Sedimentation basin   -  0.2  4.0  9.5  21.1  14.6  22.5  13.2  14.9  1.30    25 Tanning coke    -   0.3   8.0   11.3   21.7   17.0   17.9   11.0   12.8   1.6     9 Blast furnace coke   2.0   0.6   8.5   13.4   21.2   13.8   16.9   10.7   13.6   1.93     8

First, as shown in Table 1, since the water distribution included in the coke introduced through the transport belt conveyor and the vehicle is different, the crushed and screened coke flows into the ore bin 150 and then blended. The load cell (LOAD CELL) 152, which is a cutting device for mixing the raw material, has a problem in that the amount of coke to be mixed is not constant because the coke is mixed with the blended material while excluding the weight of the water.

Second, as shown in Table 1, the particle size containing less moisture in the fine particles are likely to be eliminated by the dust collecting dust collected during the transport process, and if the fine particles contain less moisture, the other coke particles and pseudo It is rarely formed of particles (agglomeration), and this lowers the coke average particle size (1.5-2.0 mm) required in the sintering operation, thereby deteriorating breathability during the sintering operation.

Third, as shown in the graph in Figure 5, when the coke included in the blended raw material is not mixed uniformly, when firing in the sintering machine layer, it can be seen that a lot of wavelengths of the temperature change pattern width occurs, the sintering associated with this The velocity of the air is inhibited, and a portion of the coke mixed with a large amount of coke may be over-melted to generate a red light, and a portion of the mixed material may not be melted properly to increase the incidence of powder coke.

Fourth, due to the dust (DUST) generated by transporting a small amount of coke contained in the coke during the crushing and screening process, it acts as a major cause of air pollution, and there is a problem that occurs to the health of the equipment inspector .

The present invention has been made to solve the above-mentioned conventional problems, and always maintains a constant water content (5-7%) contained in the coke used as a sintering heat source, thereby mixing in the blended raw material The purpose of the present invention is to provide a coke moisture control device for the sintering operation to improve the coke's cloudiness during transportation by coke amount, to coarse particles, and to prevent air pollution during transportation, crushing and sorting. have.

In order to achieve the above object, the present invention, in the apparatus for controlling the water in the coke during the manufacture of the sintered ore used as the main raw material of the blast furnace (furnace), it is connected to the venturi tube connected to the primary sorter in order to install the hot air The nozzle is formed to be disposed inside the pipe to the water removal unit including a blower, a heater and a damper configured to supply to the coke in the primary sorter, the injection pipe connected to the lower side of the venturi pipe supplied with hot air and its upper end It is configured to maintain a constant moisture of the coke passing through the primary sorter, including a water adding portion configured to increase the water content in the coke by supplying sprayed water into the interior of the primary sorter, including;
A first water meter and a second water meter disposed on the charging side and the light distribution side of the coke primary separator, respectively, wherein the water meters are electrically connected to a control panel to drive the operating members of the blower, heater and damper. By providing a coke moisture control device.

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

The coke moisture control device 1 of the sintering operation according to the present invention is mounted to the coke primary sorter 130 as shown in FIG. The coke moisture control device 1 of the present invention may install the first moisture meter 10A on the charging belt conveyor 118 of the coke primary separator 130 and maintain the detected moisture value at a constant concentration of 5-7%. The water removing unit 20 and the water adding unit 50 and a control panel 80 for automatically controlling them are provided.

The water removing unit 20 inserts the venturi tube 22 into the wall of the lower chute 130A on the opposite side of the upper chute of the primary sorter 130, and the other side of the venturi tube 22 is in the air. A blower 25 is mounted to suck air, and a damper 27 is mounted to the rear side of the blower 25 and a foreign material contained in the air sucked to the rear side of the damper 27 is removed. There is a heater 32 in which a filter 29 is installed.

The heater 32 has a steam heater 35 therein, and the air sucked into the heater 32 absorbs heat while conducting heat generated from the steam supplied to the heater 35, thereby absorbing high temperature. Heated by hot air, the heated hot air is impeller 25A of the blower 25 equipped with a direct-current motor (not shown) that can control the blowing amount according to the moisture (5-7%) of the coke. The hot air (HOT AIR) is configured to be supplied to the venturi tube 22 inserted into the lower chute wall of the primary sorter 130 by the rotation of.

In addition, according to the moisture (5-7%) of the coke, the inlet side of the blower 25 is a suction pipe 37 that can directly suck the air, and the atmospheric air sucked through the produced by the heater 32 It is provided with the dam wave 27 equipped with the motor 27A which can switch hot air each other as mentioned above.

The water adding unit 50 has a rectangular water tank 52 directly below the venturi tube 22 inserted into the wall of the lower chute 130A on the opposite side of the upper chute of the primary sorter 130. The water tank 52 has a water pump 56 for supplying water therein and the water pumped from the pump 56 may be automatically opened and closed according to the high and low level of the water tank 52. It is configured to be introduced into the water tank 52 through the fluorine valve (58).

On the other hand, the injection pipe 60 in the vertical direction in the rectangular water tank 52 is connected to the lower end side of the venturi pipe 22 inserted into the lower chute wall of the primary sorter 130, the injection pipe 60 The upper end portion protrudes somewhat from the inner surface of the venturi tube 22 to form the nozzle 64, and is fitted with a control valve 62 that can adjust the amount of water before being inserted into the venturi tube 22.

In addition, the lower chute of the primary sorter 130 is provided with a second moisture meter 10B on a light distribution belt conveyor to detect the moisture content of the coke selected through the primary sorter 130 again, and the moisture meter 10A. 10B are electrically connected to the control panel 80 to drive the operators of the blower 25, the heater 32, and the damper 27.

The water meter used above may be used by the online infrared water meter of JE-300, JE-500 series of JT engineering Co., Ltd. of Japan.

3 and 4, the present invention configured as described above is detected in a water meter 10A capable of detecting the moisture of coke transported through the inlet belt conveyor 118 of the primary sorter 130. The value is controlled by the moisture control mode 1, mode 2 and mode 3.

First, in the moisture control mode 1, when the moisture of the coke detected by the moisture meter 10A is within the range of 5-7%, the supply cigarette 27 of the hot air is closed to stop the supply of the hot air, and the rpm of the blower 25 is reduced. Stops at " 0 " to stop rotation of the impeller 25A of the blower 25, and at the same time, air in the air is sucked to the venturi tube 22 side naturally through the suction tube 37 and the primary sorter 130 ) Into the lower chute (103A) so that the change does not occur within the range of 5-7% moisture of the selected coke, and the coke selected by the primary sorter 130 is installed in the belt conveyor 132 of the lower chute The water is detected again by the second moisture meter 10B.

In addition, the moisture value detected by the second moisture meter 10B before light distribution in the belt conveyor 132 is displayed again on the control panel 80 in the moisture control mode 1, the mode 2, and the mode 3.

In the moisture control mode 2, when the detected moisture is 5% or less, the supply cigarette 27 of the hot air is closed to stop the supply of the hot air, and the rpm of the blower 25 is raised to raise the impeller of the blower 25. As air 25A is rotated, air in the air is sucked to the venturi tube 22 through the suction tube 37, and the air volume thereof is increased. Then, the control panel 80 calculates the amount of water to be added to the detected water value (the amount of water to be added ÷ the amount of coke × 100 charged into the primary sorter 130 = ratio determination) to determine the control valve 62. When the opening position is set and the injection pipe 60 inserted into the venturi pipe 22 is opened, water is drawn up from the water tank 52 by the pressure difference between the venturi pipes 22 and the primary separator ( 130) Water is sprayed into the lower chute in the shape of a mist and water is added to the coke to be screened.

In addition, the coke selected by the primary sorter 130 is detected by detecting moisture before being distributed in the belt conveyor 132 by the second moisture meter 10B installed in the lower belt conveyor 132 of the lower chute. The value is displayed again in moisture control mode 1, mode 2 and mode 3.

Meanwhile, the water consumed while being sprayed from the venturi tube 22 is automatically lowered as it exits the rectangular water tank 52, and the float 58A is automatically lowered, and is electrically connected to the water pump 56. The float valve 58 is opened to replenish water automatically, and when the water level rises, the float 58A is automatically raised to stop the water pump 56, and the float valve 58 is closed to automatically water. To block.

In addition, in the moisture control mode 3, when the detected moisture is 7% or more, the supply cigarette 27 of the hot air is opened to block the air from being sucked through the suction pipe 37, and the blower 25 supplies the hot air. Rpm of the fan is raised so that the air sucked from the heater 35 is heated by the steam of the heater 32 while the impeller 25A of the blower 25 is rotated. The tea separator 130 blows into the lower chute to evaporate the water of the coke to be sorted.

In addition, the coke selected by the primary sorter 130 detects moisture before light distribution in the belt conveyor 132 by a water meter 10B installed in the belt conveyor 132 of the lower chute, and the detected value is moisture. The control mode 1, mode 2 and mode 3 are displayed again.

According to the present invention as described above by adjusting the moisture content contained in the coke in order to keep the water constant, the amount of coke mixed in the blending material is different, thereby uniformly forming the wavelength of the temperature pattern during firing in the sintering machine layer By adding water to the fine powder, it improves the cloudiness in the transportation process, and the fine particles get stuck to the coarse particles, increasing the average particle size of coke, and reducing the amount of dust generated during the transportation process to prevent air pollution and The effect of preventing loss is obtained.

Claims (4)

In the apparatus for controlling the moisture in the coke in the production of sintered ore used as the main raw material of the blast furnace (furnace), It is installed in order to be connected to the venturi tube 22 connected to the primary sorter 130 in order to include a blower 25, a heater 32 and a damper 27 configured to supply hot air to the coke in the primary sorter. The primary sorter including a water removing unit 20, a spray pipe 60 connected to the lower side of the venturi pipe 22 to which hot air is supplied, and a nozzle 64 formed at an upper end thereof in the pipe. It is configured to maintain a constant moisture of the coke passing through the primary separator, including a water addition unit 50 configured to increase the water content in the coke by supplying sprayed water to the inside of the, The first moisture meter 10A and the second moisture meter 10B disposed on the charging side and the light distribution side of the coke primary separator 130, respectively, wherein the moisture meters include the blower 25, the heater 32, and the damper ( 27. The coke moisture control device of the sintering operation, characterized in that it is electrically connected to the control panel (80) to drive the operators. The venturi tube 22 of the water removing unit 20 is inserted into and connected to a wall of the lower chute 130A of the primary separator 130, and the blower is connected to the other side of the venturi tube 22. The heater 25 is mounted, the damper 27 is mounted to the rear side of the blower 25, and the heater having a filter 29 at the rear side of the damper 27 to remove the foreign matter contained in the sucked air. 32 is installed, the heater 32 has a steam heater 35 therein, the air sucked into the heater 32 is conducted while the heat generated from the steam supplied to the heater 35 is conducted Heat absorbed heat is heated by hot air, the heated hot air is inserted into the lower chute wall of the primary sorter 130 by the operation of the blower 25 that can control the blowing amount according to the moisture level of the coke. It is configured to supply hot air to the venturi tube (22) Coke moisture control apparatus for sintering operation as that. According to claim 1, wherein the water addition portion injection pipe 60 connected to the lower end side of the venturi tube 22 of the primary sorter 130 is a water tank 52 disposed in the lower portion of the venturi tube (22) In addition, the water tank 52 is provided with a water pump 56 for supplying water therein and a fluorine valve 58 for automatically opening and closing the water pumped from the pump 56, the rectangular An upper end portion of the injection pipe 60 connected to the venturi pipe 22 in a vertical direction in the water tank 52 protrudes from an inner surface of the venturi pipe 22 to form the nozzle 64, and the injection pipe 60 is a coke moisture control device of the sintering operation, characterized in that the control valve 62 that can adjust the amount is mounted. The first water meter (10A) is mounted to the charging belt conveyor 118 of the primary sorter 130, is disposed on the sorter charging side, the second water meter (10B) is the primary Coke moisture control apparatus for the sintering operation, characterized in that mounted on the lower chute light distribution belt conveyor 132 of the sorter 130 is disposed on the sorter light distribution side.

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