KR20140011214A - Flow control apparatus and the method thereof - Google Patents

Flow control apparatus and the method thereof Download PDF

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Publication number
KR20140011214A
KR20140011214A KR1020120078364A KR20120078364A KR20140011214A KR 20140011214 A KR20140011214 A KR 20140011214A KR 1020120078364 A KR1020120078364 A KR 1020120078364A KR 20120078364 A KR20120078364 A KR 20120078364A KR 20140011214 A KR20140011214 A KR 20140011214A
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KR
South Korea
Prior art keywords
combustion
gas
combustion chamber
air
pressure value
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KR1020120078364A
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Korean (ko)
Inventor
권재현
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주식회사 포스코
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Priority to KR1020120078364A priority Critical patent/KR20140011214A/en
Publication of KR20140011214A publication Critical patent/KR20140011214A/en

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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B21/00—Heating of coke ovens with combustible gases
    • C10B21/10—Regulating and controlling the combustion
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D7/00—Control of flow

Abstract

The present invention relates to a combustion device and a combustion method. The combustion device comprises the following: a combustion chamber; a fluid supplying unit inserting fluid into the combustion chamber by being connected to the combustion chamber; an adjusting device adjusting the valve open rate of the fluid supplying unit by being installed on the fluid supplying unit; a distribution path connected to the combustion chamber for discharging waste gas from the combustion chamber; an opening and closing device for opening and closing the distribution path by being installed on one side of the distribution path; a measuring device measuring the pressure of the waste gas inside the distribution path by being installed on the front side of the opening and closing device inside the distribution path; and a control unit controlling the valve open rate of the fluid supplying unit by controlling the adjusting device based on the measuring result of the measuring device. The combustion device can improve the combustion efficiency by uniformly controlling the flow rate of air and fuel gas supplied into a combustion room of a cokes oven.

Description

Combustion apparatus and combustion method

The present invention relates to a combustion apparatus and a combustion method, and more particularly to a combustion apparatus and a combustion method that can improve the combustion efficiency by constantly adjusting the flow rate of air and fuel gas supplied to the combustion chamber of the coke oven.

The coke oven is a device for producing coke to be used as fuel in the blast furnace from coal as a raw material, the coke production process is very important because the quality of the coke has a great influence on the charter work in the blast furnace.

1 is a perspective view schematically showing a typical coke oven.

Referring to the drawings described above, the coke oven 100 is installed in both of the carbonization chamber 110 and the carbonization chamber 110 into which the raw material such as coal is charged, and combustion gas and air are injected into the carbonization chamber 110. ) A heat storage chamber 130 that generates heat required for coal coaling, and a heat storage chamber 130 that accumulates heat generated in the combustion chamber 120 and supplies it to the carbonization chamber 110, and below the heat storage chamber 130. It is installed in the distribution channel 140, through which air and gas are distributed.

Combustion gas supplied to the combustion chamber 120 is introduced through a gas inlet box 160, and air is air inlet box 150 installed adjacent to the gas inlet 160. Flows through.

The gas introduced through the coke oven 100 flows into the combustion chamber 120 through the flow passage 140 and the heat storage chamber 130, and burns in the combustion chamber 120 to transfer heat to the carbonization chamber 110. The gas, which has been burned in the combustion chamber 120, is discharged to the flue 180 via the flow passage 140. Between the flow path 140 and the year 180 is provided with an opening and closing device 190 for opening and closing therebetween.

Meanwhile, in order to evenly dry coal charged in the carbonization chamber 110, the inside of the oven must be maintained at an appropriate pressure in order to appropriately adjust the flame length in the combustion chamber 120.

However, the change in the external pressure in accordance with the change in the ambient temperature occurs a change in the content of the components affecting the combustion in the air and gas flowing into the combustion chamber. In particular, in summer, the external pressure decreases due to an increase in temperature, so that the pressure in the oven becomes relatively high, thereby reducing the amount of air flowing into the combustion chamber, and the amount of absolute oxygen per 1 m 3 of air introduced into the combustion chamber due to the expansion of air. Because of this decrease, incomplete combustion occurs, and there is a problem that the temperature of the combustion chamber does not rise to a desired temperature.

The pressure gauge is installed in front of the opening and closing device 190, and the operator directly controls the opening and closing degree of the opening and closing device 190, the gas inlet 160 and the air inlet 150 in accordance with the measured pressure value in the oven The pressure was adjusted.

By the way, the coke oven has a number of combustion chambers and switchgear, gas inlet and air inlet connected to it, it is difficult for the operator to adjust the degree of opening and closing, there is a problem that is exposed to the risk of safety accidents during work. .

KR 2012-64538 A KR 0797852 B JP 2012-7112 A

The present invention provides a combustion apparatus and a combustion method capable of supplying a constant amount of air and gas to a combustion chamber in response to a change in pressure of waste gas.

The present invention provides a combustion apparatus and a combustion method capable of supplying a constant amount of air and gas to a combustion chamber in response to a change in pressure of waste gas caused by an external temperature change.

Provided are a combustion apparatus and a combustion method capable of improving the quality of a product of the present invention.

The combustion apparatus which concerns on embodiment of this invention is a combustion chamber; A fluid supply unit connected to the combustion chamber to introduce a fluid into the combustion chamber; A regulator provided at the fluid supply part to adjust an opening degree of the fluid supply part; A circulation passage connected to the combustion chamber, through which waste gas of the combustion chamber is discharged; An opening and closing device provided at one side of the distribution path to open and close the distribution path; A measurer provided at the front of the opening and closing device in the flow passage to measure the waste gas pressure in the flow passage; And a controller configured to adjust the opening degree of the fluid supply unit by controlling the regulator according to the measurement result of the measuring instrument.

The fluid supply unit may be an air inlet unit through which air is introduced, and a gas inlet unit through which fuel gas is introduced. The regulator may be provided in the air inlet and the gas inlet, respectively.

The regulator may include a damper installed in the fluid supply unit, and a driving device for operating the damper under the control of the controller.

A combustion method according to an embodiment of the present invention is a combustion method for producing coke, comprising the steps of: charging a raw material into a carbonization chamber; Injecting air and fuel gas into the combustion chamber provided at one side of the carbonization chamber and combusting the gas, and measuring the pressure of waste gas discharged from the combustion chamber in the process of combusting the air and fuel gas. The flow rate of the air and fuel gas is adjusted.

The flow rate adjustment of the air and fuel gas may be performed by adjusting the opening ratio of the air inlet and the gas inlet through which the air and the fuel gas are introduced by comparing the pressure value of the waste gas with a preset pressure value.

On the other hand, the pressure value of the waste gas may be changed according to the temperature change. In this case, the pressure value of the waste gas may be measured to be smaller than the preset reference pressure value when the temperature increases, and may be measured to be larger than the preset reference pressure value when the temperature decreases.

When the pressure value of the waste gas is smaller than the preset reference pressure value, the opening ratios of the air inlet and the gas inlet are reduced, and when the pressure value of the waste gas is greater than the preset reference pressure, the air inlet And the opening degree of the gas inlet may be increased.

The reference pressure value may be -15 to -25 mmHg.

The combustion apparatus and the combustion method which concern on embodiment of this invention can improve the combustion efficiency of the combustion chamber of a coke oven. That is, the combustion efficiency can be improved by appropriately adjusting the flow rates of the air and fuel gas supplied to the combustion chamber in response to the change in the internal pressure of the combustion chamber according to the change in the ambient temperature (temperature). Therefore, the temperature inside the combustion chamber can be kept constant at all times.

Combustion apparatus and combustion method according to an embodiment of the present invention, by using the pressure value measured in the flow path through which the waste gas is discharged by automatically adjusting the opening rate of the fluid supply unit in which air and combustion gas flows to reduce the burden on the operator I can alleviate it.

1 is a perspective view schematically showing a typical coke oven equipment.
2 is a schematic illustration of a coke oven facility in accordance with an embodiment of the present invention.
Figure 3 is a view showing the operating state of the regulator and the switchgear.
Figure 4 is a flow chart showing a process of adjusting the supply amount of the fluid in the combustion method according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be embodied in various different forms, and it is to be understood that these embodiments are merely illustrative of the principles of the invention and are not intended to limit the scope of the invention to those skilled in the art. It is provided to let you know completely.

Combustion apparatus and combustion method according to the present invention is provided in a combustion device for supplying air and fuel gas to the combustion chamber to combust various raw materials, and discharge the waste gas generated in the combustion process, to control the flow rate of air and fuel supplied to the combustion chamber It can be applied to In the present embodiment, an example applied to adjusting the supply amounts of air and fuel gas supplied to the combustion chamber of the coke oven will be described.

2 is a view schematically showing a coke oven installation according to an embodiment of the present invention.

Referring to FIG. 2, the combustion apparatus includes a combustion chamber 210 of a coke oven, an air inlet 220 for introducing air into the combustion chamber 210, a gas inlet 230 for introducing fuel gas, and a combustion chamber. It is connected to include a flow path 240 for discharging waste gas generated in the combustion process and the opening and closing device 242 (waste side) for opening and closing the flow path 240. In addition, the combustion apparatus, each of the air inlet 220 and the gas inlet 230, regulators 228 and 238 for adjusting the opening degree, the measuring unit 250 and the regulator for measuring the pressure inside the flow path 240 228 and 238 and a control unit 270 for controlling the operation of the measuring device 250 and the opening and closing device 242. The combustion apparatus introduces air and fuel gas into the combustion chamber 210 through the air inlet 226 and the gas inlet 236, and in the combustion chamber 210 discharges waste gas generated during the combustion process to the distribution path 240. Exhaust to the flue 260, a part is circulated to the combustion chamber (210).

Combustion chamber 210 is composed of a plurality, the two combustion chambers (210a, 210b) are paired. In addition, the plurality of combustion chambers 210a and 210b are paired with each other to be divided into an odd-numbered combustion chamber 210a and an even-numbered combustion chamber 210b, and to maintain a constant temperature in a carbonization chamber (not shown). 210a) and the even-numbered combustion chamber 210b operate alternately. The alternating combustion of the odd-numbered combustion chamber 210a and the even-numbered combustion chamber 210b is called reversing, and this reversal is performed by a reversing device (not shown) composed of a cylinder and a pull rod to provide air and fuel gas. By controlling the injection and discharge of the waste gas, a reversing action is caused. This reversal action usually occurs every 20 minutes.

A carbonization chamber is disposed between the plurality of combustion chambers 210, and a fireproof wall is provided between the combustion chamber 210 and the carbonization chamber. In the carbonization chamber, a raw material, such as a coal mixture, is carbonized by heat generated in the combustion chamber 210 is charged.

Two combustion chambers 210a and 210b are separated through a hairpin 212 in pairs, and each combustion chamber 210a and 210b has an air inlet 226 for supplying air containing oxygen, and a blast furnace as a fuel gas. A gas inlet 236 is provided for supplying a mixed gas of gas and coke oven gas. Here, the mixed gas includes a coke oven gas and a blast furnace gas generated in the blast furnace, and the mixed gas flows into the combustion chamber 210 through the gas inlet 230 when the blast furnace is operated, and air is an air inlet ( It is introduced into the combustion chamber 210 through the 220. The gas inlet 230 connects a gas inlet box 232 to the gas inlet 236 and the gas inlet box 232 and the gas inlet 236 disposed in the combustion chamber 210. It includes a gas inlet pipe 234. The air inlet 220 is an air inlet box 222, an air inlet 226 and an air inlet box 222 and an air inlet 226 disposed in the combustion chamber 210. It includes an air inlet pipe 224 to connect. The gas inlet box 232 and the air inlet box 222 may be provided with a guide plate (not shown) for controlling the flow of gas and air.

Each of the gas inlet 230 and the air inlet 220 is provided with regulators 228 and 238 for adjusting the degree of opening of the air inlet box 222 and the gas inlet box 232, for example.

The regulators 228 and 238 may be plate-shaped dampers, and in addition, various types of opening and closing devices 242 may be applied to the opening ratios of the gas inlet 230 and the air inlet 220. The regulators 228 and 238 include a plate-shaped damper and a driving device (not shown) for moving the damper, and are automatically operated by the control of the controller 270. The regulators 228 and 238 may adjust the degree of opening of the gas inlet 230 and the air inlet 220 by moving the plate-shaped damper in the vertical direction by the driving means. Accordingly, the flow rates of the gas and the air introduced through the gas inlet 230 and the air inlet 220 may be adjusted.

The switch 242 may be a plate-shaped damper, and is closed while gas and air are introduced from the gas inlet 230 and the air inlet 220 for combustion, and opened while the waste gas is discharged due to the combustion. To discharge the waste gas into the flue 260.

The measuring device 250 is installed in the distribution channel 240 to measure the pressure of the waste gas in the distribution channel 240. At this time, when the measuring device 250 is installed in the area where the waste gas is discharged from the combustion chamber 210, it is difficult to accurately measure the waste gas pressure in the flow path 240, and thus the front region of the switching device 242 in the flow path 240. It is good to be provided in.

The controller 270 compares the pressure value of the waste gas measured by the measuring device 250 with a preset reference pressure value, and controls the operation of the regulators 228 and 238 according to the comparison result, thereby controlling the gas inlet 230 and the gas inlet 230. The opening degree of the air inlet 220 is adjusted. A concrete control method will be described later.

Through such a configuration, the combustion efficiency may be improved by automatically adjusting the amount of air and fuel gas introduced into the combustion chamber 210 using the waste gas pressure value in the distribution path 240.

Referring to the combustion method using a combustion device according to an embodiment of the present invention configured as described above are as follows.

3 is a view showing the operating state of the regulator and the opening and closing device, Figure 4 is a flow chart showing a process of adjusting the supply amount of the fluid in the combustion method according to an embodiment of the present invention.

When the raw material such as coal is charged into the carbonization chamber (S110), the opening and closing device 242 is operated to close the distribution path 240, and open the air inlet 220 and the gas inlet 230 (S112, (A) of FIG. 3). In this case, the air inlet 220 and the gas inlet 230 may be opened with a reference opening rate when a combustion occurs.

Thereafter, air and fuel gas are supplied to the combustion chamber 210 through the air inlet 220 and the gas inlet 230 (S114), and the combustion chamber 210 combusts the air and the fuel gas introduced into the raw material. Generate the heat needed to dry carbon.

While the combustion is performed in the combustion chamber 210, the pressure of the waste gas in the flow path 240 is measured using the measuring device 250 (S116). The measuring unit 250 transmits the measured pressure value of the flow path 240, that is, the pressure value of the waste gas, to the control unit 270, and the control unit 270 compares the received pressure value with a preset reference pressure value (S118). )do. As a result of the comparison, when the received pressure value is smaller than the reference pressure value, the regulators 228 and 238 are operated to reduce the opening ratios of the air inlet 220 and the gas inlet 230 (S122), thereby reducing the air inlet ( 220 and the inflow of air and gas flowing from the gas inlet 230 is reduced.

On the other hand, when the received pressure value is larger than the reference pressure value, the regulators 228 and 238 are operated to increase the opening ratios of the air inlet 220 and the gas inlet 230 (see FIG. 3B). As a result, the inflow of air and gas introduced from the air inlet 220 and the gas inlet 230 is increased. At this time, the reference pressure value of the channel 240 may be about -15 to -20mmHg.

For example, incomplete combustion may occur when the components necessary for combustion are not sufficient in the air and gas introduced into the combustion chamber 210. Accordingly, the air and the gas are not smoothly introduced through the air inlet 220 and the gas inlet 230. In this case, the pressure of the channel 240 measured by the measuring unit 250 is higher than the reference pressure. In this case, the controller 270 controls the operation of the regulators 228 and 238 to increase the opening rates of the air inlet 220 and the gas inlet 230 than the reference opening rate, thereby introducing the air inlet 220 and the gas inlet. The combustion efficiency in the combustion chamber 210 is improved by increasing the flow rates of air and gas introduced through the unit 230.

On the other hand, the air and gas is introduced through the air inlet 220 and the gas inlet 230 by the pressure difference in the outside and the flow path 240, the pressure in the flow path 240 when the external pressure is lowered Since the difference between and becomes small, the inflow is reduced. In addition, when the outside temperature is high, the density of air and gas is low, even if air and gas of the same flow rate is introduced, the content of components required for combustion is lowered, thereby lowering combustion efficiency. Therefore, in the present invention, the opening ratio of the air inlet 220 and the gas inlet 230 is adjusted to increase the pressure difference between the air inlet 220 and the gas inlet 230 and the flow passage 240. By adjusting the inflow of air and gas, the combustion efficiency in the combustion chamber 210 can be improved. Therefore, since the temperature of the combustion chamber 210 can be kept constant at all times, the quality of the produced product can be improved.

Although the present invention has been described in connection with certain exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Therefore, the scope of the present invention should not be limited by the described embodiments, but should be defined by the appended claims and equivalents thereof.

210: combustion chamber 220: air inlet
230: gas inlet 240: distribution path
250: meter 260: year
270:

Claims (10)

A combustion chamber;
A fluid supply unit connected to the combustion chamber to introduce a fluid into the combustion chamber;
A regulator provided at the fluid supply part to adjust an opening degree of the fluid supply part;
A circulation passage connected to the combustion chamber, through which waste gas of the combustion chamber is discharged;
An opening and closing device provided at one side of the distribution path to open and close the distribution path;
A measurer provided at the front of the opening and closing device in the flow passage to measure the waste gas pressure in the flow passage; And
And a controller configured to adjust the opening degree of the fluid supply part by controlling the regulator according to the measurement result of the measuring device. The method according to claim 1,
And the fluid supply unit is an air inlet unit through which air is introduced, and a gas inlet unit through which fuel gas is introduced. According to claim 2,
The regulator is provided with the air inlet and the gas inlet respectively. The method according to claim 1 or 3,
The regulator includes a damper installed in the fluid supply unit, and a combustion device for driving the damper under the control of the control unit. As a combustion method for producing coke,
Charging the raw material into the carbonization chamber;
And introducing air and fuel gas into a combustion chamber provided at one side of the carbonization chamber to combust it.
Combustion method of controlling the flow rate of the air and fuel gas flowing into the combustion chamber by measuring the pressure of the waste gas discharged from the combustion chamber in the process of burning the air and fuel gas. The method according to claim 5,
The flow rate control of the air and fuel gas is performed by comparing the pressure value of the waste gas and a predetermined pressure value by adjusting the opening ratio of the air inlet and the gas inlet through which the air and fuel gas are introduced. The method of claim 6,
Combustion method wherein the pressure value of the waste gas is changed in accordance with the change in temperature. The method of claim 7,
And a pressure value of the waste gas is measured to be smaller than the preset reference pressure value when the temperature increases, and to be measured to be larger than the preset reference pressure value when the temperature decreases. The method of claim 6 or claim 8,
When the pressure value of the waste gas is smaller than the preset reference pressure value, the opening ratios of the air inlet and the gas inlet are decreased.
And the open rate of the air inlet and the gas inlet is increased when the pressure value of the waste gas is greater than the preset reference pressure value. The method of claim 6 or claim 8,
The reference pressure value is -15 to -25mmHg combustion method.
KR1020120078364A 2012-07-18 2012-07-18 Flow control apparatus and the method thereof KR20140011214A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160076052A (en) 2014-12-22 2016-06-30 주식회사 포스코 Method and apparatus for combustion control in coke oven
JP2016169210A (en) * 2015-03-09 2016-09-23 東ソー株式会社 Method for producing fused-ring aromatic compound
CN107674688A (en) * 2017-10-26 2018-02-09 宣化钢铁集团有限责任公司 A kind of coke oven exchange shutter throttle opening adjusting means
KR102475570B1 (en) 2022-09-01 2022-12-08 주식회사 청호 시스템 Combustion chamber gas control device and control method of coke oven

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160076052A (en) 2014-12-22 2016-06-30 주식회사 포스코 Method and apparatus for combustion control in coke oven
JP2016169210A (en) * 2015-03-09 2016-09-23 東ソー株式会社 Method for producing fused-ring aromatic compound
CN107674688A (en) * 2017-10-26 2018-02-09 宣化钢铁集团有限责任公司 A kind of coke oven exchange shutter throttle opening adjusting means
CN107674688B (en) * 2017-10-26 2024-03-22 宣化钢铁集团有限责任公司 Coke oven exchange shutter air door opening adjusting device
KR102475570B1 (en) 2022-09-01 2022-12-08 주식회사 청호 시스템 Combustion chamber gas control device and control method of coke oven

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