KR101400342B1 - Sintering apparatus - Google Patents

Abstract

A sintering apparatus is disclosed. According to the present invention, the sintering apparatus includes: a plurality of sintering trailers running along a continuous track; a plurality of suction ducts located on the lower portion of the sintering trailers to suck the flue gas produced by the sintering of materials inserted into the sintering trailers; a flue gas pipe connected to the suction ducts to convey the flue gas; a blower for providing a suction force to the flue gas pipe and the suction ducts for the suction and conveying of the flue gas; a temperature sensor disposed on the suction duct located on the rear end in the running direction of the sintering trailers among the suction ducts to sense the temperatures of the lower portions of the sintering trailers; a shut-off valve for adjusting the flowing of the flue gas between the rear side suction duct and the flue gas pipe; and a controller for shutting off the flowing of the flue gas by the operation of the shut-off valve if the temperatures of the lower portions of the sintering trailers sensed by the temperature sensor are over a given set target value.

Description

[0001] SINTERING APPARATUS [0002]

The present invention relates to a sintering apparatus.

The sintering process is a process for producing sintered ores by massing minute iron ores. Such sintered ores are manufactured by charging a blended raw material obtained by mixing subsidiary raw materials such as coke and limestone into a sintered iron ore, into a sintered bogie moving along an infinite orbit. When the surface of the blended raw material charged in the sintered bogie is ignited and air is sucked downward in the sintered bogie, the raw material moves to the bottom side of the sintered bogie and sintering of the blended raw material is performed inside the sintered bogie.

The background art of the present invention is disclosed in Korean Patent Registration No. 10-0406358 (Mar. 24, 2004, Sintering method of flue gas circulating iron ore and its apparatus).

The present invention provides a sintering apparatus capable of controlling the temperature and the flow rate of the sintering exhaust gas.

According to one aspect of the present invention, there is provided a sintering machine comprising: a plurality of sintered bogies running along an endless track; a plurality of suction ducts disposed at a lower portion of the sintered bogie for sucking an exhaust gas generated by sintering of raw materials charged in the sintered bogie; An exhaust gas duct connected to the suction duct for conveying the exhaust gas, a blower for supplying a suction force to the exhaust gas duct and the suction duct for suction and conveyance of the exhaust gas, and a plurality of suction ducts disposed on a rear duct located at a rear end of the sintered bogie A temperature sensor for detecting the temperature of the lower portion of the sintered bogie, a shutoff valve for controlling the flow of the exhaust gas between the rear duct and the exhaust gas duct, and a shutoff valve for detecting the temperature of the lower portion of the sintered bogie detected by the temperature sensor, And a control unit for operating the valve to shut off the flow of the exhaust gas.

The sintering apparatus further includes a flow controller for regulating the suction flow rate of the blower, and the control unit can operate the flow controller to reduce the suction flow rate of the blower in conjunction with the operation of the shutoff valve.

The rear ducts are arranged on the plurality of rear ducts so as to correspond one-to-one with the rear ducts. The shut-off valves are arranged in a plurality of rear ducts and the exhaust ducts so as to correspond one- Respectively.

The control unit may include a shutoff valve corresponding to the temperature sensor that first senses the temperature equal to or higher than the target value and a shutoff valve corresponding to the temperature detected by the temperature sensor located at the rear of the temperature sensor It is possible to shut off the flow of the exhaust gas by operating both the temperature sensor and the corresponding shut-off valve.

The control unit may operate the flow regulator such that the suction flow rate of the blower is reduced by a ratio to the total number of the plurality of suction ducts of the number of the rear ducts whose flow of the exhaust gas is blocked.

According to the present invention, the temperature and the flow rate of the sintered exhaust gas can be controlled, and thus the sintered exhaust gas can be treated more smoothly.

1 shows a sintering apparatus according to an embodiment of the present invention.
2 is an enlarged partial enlarged view of a rear end portion of a sintering apparatus according to an embodiment of the present invention;
3 is a cross-sectional view illustrating a process of sintering in a raw material by a sintering apparatus according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Hereinafter, an embodiment of the sintering apparatus according to the present invention will be described in detail with reference to the accompanying drawings. In the following description with reference to the accompanying drawings, the same or corresponding components are denoted by the same reference numerals, Is omitted.

1 and 2, the sintering apparatus 100 includes a sintering bogie 110, a suction duct 120, an exhaust gas pipe 130, A sintering apparatus 100 including a blower 140, a temperature sensor 150, a shutoff valve 160, a control unit 170, and a flow controller 180 is shown.

According to this embodiment, when the sintering process is completed before the sintered bogie 110 reaches the final suction duct 120, the temperature sensor 150 and the shutoff valve 160 are used to move the sintered bogie 110, It is possible to reduce the temperature of the exhaust gas by closing the suction duct 120 (rear duct 125) located at the rear end of the blower 140 in conjunction with the operation of the shutoff valve 160 The total flow rate of the exhaust gas can be reduced.

Treatment of the exhaust gas generated by the sintering process can be performed by a CSCR (Carbon Selective Catalytic Reduction) facility such as an electrostatic precipitator, a filter and an activated carbon adsorption tower. The activated carbon adsorption tower removes sulfur oxides and nitrogen oxides from the exhaust gas through the adsorption reaction of activated carbon and the catalytic reaction of ammonia and nitrogen oxides of activated carbon, respectively, and operates at about 140 ° C. Generally, sintered exhaust gas It is necessary to lower the temperature of the exhaust gas before being injected into the activated carbon adsorption column.

On the other hand, in the case of this embodiment, when the sintering process is completed before the sintering bogie 110 reaches the final suction duct 120, the rear duct 125 which sucks the relatively high temperature exhaust gas is closed, By reducing the suction flow rate of the blower 140, it is possible to reduce the average temperature of the exhaust gas to 180 degrees Celsius or less and reduce the total flow rate of the exhaust gas. Therefore, the temperature of the exhaust gas can be more effectively lowered in the cooling process of the exhaust gas for treating the exhaust gas using the activated carbon adsorption tower as described above.

Hereinafter, each configuration of the sintering apparatus 100 according to the present embodiment will be described in more detail with reference to FIG. 1 to FIG.

As shown in Fig. 1, a plurality of sintering bogie 110 are continuously disposed on the circulating rail and run along an endless track. In this case, the plurality of sintering bogie 110 can be transferred to the endless track by the sprocket 111. The sprockets 111 may be disposed on both sides of the body of the sintering machine and the drive wheels 112 may be disposed on both sides of the sprocket 111 to transfer the sprockets 111 in an endless track.

As shown in FIG. 1, a charging unit 113 for supplying a raw material to the sintering bogie 110 may be disposed at the front end of the sintering machine main body. The charging part 113 is composed of an upper light hopper and a surge hopper, and supplies the upper light and the compounding material to the sintering carriage 110. The blended raw material means a mixture of minute iron ore, coke and limestone at a certain ratio.

The ignition part 114 is located behind the charging part 113 as shown in FIG. 1 to ignite the above-mentioned raw material. The sintered bogie 110 moves rearward while the raw material is ignited by the ignition unit 114. The suction duct 120 located at the lower portion of the sintered bogie 110 during the process moves the lower portion of the sintered bogie 110 A strong suction force is generated to sinter the fuel.

As shown in FIG. 1, a crusher 115 for crushing sintering light emitted from the sintering bogie 110 may be disposed at the rear end of the sintering machine body. A cooler for cooling the sintered ores may be disposed under the crusher 115.

A communication hole may be formed in the lower portion of the sintering carriage 110 by overlapping a plurality of great bars. The plurality of great bars may be arranged in a structure in which they are superimposed on each other in a standing state in the vertical direction.

1, a plurality of suction ducts 120, a so-called windbox, are disposed below the sintered bogie 110 to suck air down the sintered bogie 110 as described above, The sintering of the raw materials charged in the sintering bogie 110 is performed by the sintering of the raw materials. That is, the suction duct 120 is connected to the communication hole under the sintering bogie 110 to suck the exhaust gas generated in the sintering bogie 110.

As shown in FIG. 1, the suction ducts 120 may be arranged in a line along the direction of movement of the sintered bogie 110. In the present embodiment, a total of 25 suction ducts 120 are provided as an example . As shown in FIG. 1, each of the suction ducts 120 is referred to as a suction duct 120 of No. 1 to No. 25 in order. As shown in FIGS. 1 and 2, the suction duct 120 located at the rear end of the sintered bogie 110 in the direction of travel of the sludge bogie 110 is separately referred to as a rear duct 125, For example, the suction ducts 21 to 25, that is, the rear five suction ducts 120 correspond to the rear duct 125 as an example.

As shown in FIG. 1, the exhaust gas pipe 130 is connected to a plurality of suction ducts 120, and the exhaust gas generated by the above-described sintering process and sucked into the suction duct 120 is transferred to the outside. The blower 140 is disposed behind the exhaust gas pipe 130 to provide a suction force for suction and transport of the exhaust gas to the exhaust gas pipe 130 and the suction duct 120. As the blower 140, a blower or the like may be used.

The exhaust gas along the exhaust gas pipe 130 can be transferred to an exhaust gas treatment facility composed of an electrostatic precipitator, a filter and an activated carbon adsorption tower, and the exhaust gas from which pollutants are removed by the exhaust gas treatment facility can be discharged to the atmosphere through the stack .

2, the temperature sensor 150 includes a rear duct 125 positioned at a rear end of the sintered bogie 110 in the direction of travel of the sintering bogie 110, that is, the suction ducts 21 to 25, So that the temperature of the lower portion of the sintered bogie 110 can be sensed. That is, the temperature sensor 150 is installed on the rear duct 125 on the side of the sintering machine main body so as to sense the lower temperature of the sintering carriage 110 passing through the upper portion.

3, sintering proceeds from the upper side to the lower side of the sintered bogie 110. At the time when the sintering is completed (the last state on the right side of FIG. 3) The temperature will reach, for example, 1200 degrees Celsius.

Therefore, when the temperature sensor 150 senses the lower temperature of the sintered bogie 110, the controller 170 determines whether the sensed temperature is equal to or higher than a predetermined target value, for example, The shutoff valve 160 is operated based on the information to determine whether or not the raw material in the sintered bogie 110 passing through the rear duct 125 And the exhaust gas pipe 130, thereby stopping the suction of air to the sintered bogie 110, in which sintering is completed and no further air suction is required, thereby preventing the generation of unnecessary exhaust gas.

The exhaust gas generated by sintering tends to increase rapidly toward the completion of sintering (the right end state of FIG. 3), that is, toward the rear of the intake duct 120, to about 600 degrees Celsius, When the generation of flue gas by air suction continues, similarly, a high-temperature flue gas is similarly generated.

Therefore, when the completion of the sintering is detected by detecting the temperature of the temperature sensor 150 and the suction of the exhaust gas after completion of the sintering is cut off as in the present embodiment, the entire temperature of the exhaust gas sucked throughout the suction duct 120 is lowered .

In this case, the flow rate regulator 180, for example, an inverter for controlling the rotational speed of the blower 140 is installed to adjust the suction flow rate of the blower 140, so that the temperature of the exhaust gas is lowered, Can be reduced.

That is, the control unit 170 may operate the flow regulator 180 in conjunction with the operation of the shut-off valve 160 so that the suction flow rate of the blower 140 is reduced. That is, when the completion of the sintering is detected by the temperature sensor 150 and the rear duct 125 is shut off by the shutoff valve 160, the suction flow rate of the blower 140 can be reduced correspondingly, The flow rate of the entire flue gas sucked through the flue 120 can be reduced.

In the present embodiment, the rear ducts 125 are arranged as a plurality of the suction ducts 120 along the running direction of the sintered bogie 110 as shown in FIG. 2, The shutoff valve 160 is disposed on the rear duct 125 so as to correspond one-to-one with the rear duct 125. The shutoff valve 160 has a plurality of rear ducts 125, (130), respectively.

The sintering bogie 110 may include a temperature sensor 150, a shutoff valve 160, and a controller (not shown), for example, when the sintering of the raw material is completed through the duct 23 of the rear duct 125. 170) will be described.

2, the sintered bogie 110 is moved to the rear of the sintering machine body while sintering is proceeding. When the sintering is completed, the sintered bogie 110 discharges the sintered light to the outside of the sintered bogie 110, .

In this case, when the raw material in the sintered bogie 110 passing through the suction duct 120 of the rear duct 125 is completely sintered, the temperature of the bottom of the sintered bogie 110 reaches 1200 ° C., Lt; RTI ID = 0.0 > 110 < / RTI >

Each of the temperature sensors 150 disposed on the rear duct 125 can sense the temperature of the lower portion of the sintered bogie 110 passing over the temperature sensor 150. The temperature sensor 150 disposed on the suction duct 120 The control unit 170 controls the temperature sensor 150 on the suction duct 120 for the first time to detect the temperature equal to or higher than the target value to the temperature sensor 150 on the suction duct 120, And the temperature sensors 150 located behind the temperature sensor 150 on the suction duct 120 for the first time that senses the temperature equal to or higher than the target value to operate the shutoff valves 160 corresponding to the temperature sensors 150, As shown in FIG.

That is, when sintering of the sintered bogie 110 is completed through the suction duct 120, the suction duct 120 and the suction ducts 120 located behind the suction duct 120, that is, the suction ducts 23 to 25, The suction duct 120 closes the suction ducts 120 through 120 since the suction pipe 120 does not need to suck the air any more. The shutoff valve 160 is provided between each of the rear ducts 125 and the exhaust gas pipe 130 so as to control whether the exhaust gas flows between them. The shutoff valves 160 corresponding to the suction ducts 120 can be operated to block suction of the exhaust gas.

In this case, the control unit 170 controls the amount of flow of the blower 140 so that the suction flow rate of the blower 140 is reduced by the ratio of the number of the rear ducts 125 to the total number of the plurality of suction ducts 120, Lt; / RTI >

That is, as described above, when the suction ducts 23 to 25 are closed and the flow of the exhaust gas from the suction ducts 120 to the exhaust gas pipe 130 is blocked, the control unit 170 controls the entire suction ducts 120 The flow regulator 180 is controlled such that the suction flow rate of the blower 140 is reduced by the ratio of the number of the closed rear ducts 125 to the number of the closed rear ducts 125, Thereby reducing the flow rate of the total flue gas discharged through the flue gas.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit of the invention as set forth in the appended claims. The present invention can be variously modified and changed by those skilled in the art, and it is also within the scope of the present invention.

100: sintering apparatus
110: Sintered vehicle
111: Sprocket
112: drive wheel
113:
114:
115: Crusher
120: Suction duct
125: rear duct
130: Exhaust gas pipe
140: blower
150: Temperature sensor
160: Isolation valve
170:
180: Flow regulator

Claims (5)

A plurality of sintering bogies traveling along an infinite orbit;
A plurality of suction ducts disposed at a lower portion of the sintered bogie and sucking an exhaust gas generated by sintering the raw materials charged in the sintered bogie;
An exhaust gas pipe connected to the plurality of suction ducts to transfer the exhaust gas;
A blower for providing suction force to the exhaust gas pipe and the suction duct for suction and conveyance of the exhaust gas;
A temperature sensor disposed on a rear duct positioned at a rear end of the plurality of suction ducts in the direction of travel of the sintered bogie to sense the temperature of the lower portion of the saddle bogie;
A shutoff valve for controlling whether the exhaust gas flows between the rear duct and the exhaust gas pipe; And
And a control unit for shutting off the flow of the exhaust gas by operating the shutoff valve when the temperature of the lower portion of the sintered bore detected by the temperature sensor is equal to or higher than a predetermined target value.
The method according to claim 1,
Further comprising a flow regulator for regulating the suction flow rate of the blower,
Wherein the control unit operates the flow rate regulator so as to reduce the suction flow rate of the blower in conjunction with the operation of the shut-off valve.
3. The method of claim 2,
The rear ducts are arranged in plural along the traveling direction of the sintered bogie,
Wherein the temperature sensors are respectively disposed on the plurality of rear ducts so as to correspond one-to-one with the rear ducts,
Wherein the shut-off valve is installed between a plurality of the rear ducts and the exhaust gas pipe so as to correspond one-to-one with the temperature sensor.
The method of claim 3,
The control unit may be configured to detect the temperature above the target value by first detecting the temperature of the shutoff valve corresponding to the temperature sensor that first sensed the temperature equal to or higher than the target value, And the flow control valve is operated to shut off the flow of the exhaust gas by operating both of the shutoff valves corresponding to the temperature sensors located behind the one temperature sensor.
5. The method of claim 4,
Wherein the controller operates the flow regulator such that a suction flow rate of the blower is reduced by a ratio of the number of the rear ducts to which the flow of the exhaust gas is blocked to the total number of the suction ducts.

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