KR20040020619A - Burner device for combustion incidental gas in iron works - Google Patents

Abstract

PURPOSE: A burner device for burning byproduct gas in a iron manufacturing plant is provided to perform the combustion of gas such as BFG(Blast Furnace Gas) and LDG(Linz Donawts Gas) with a small amount of COG (Cokes Oven Gas) of the byproduct gas so as to improve the thermal efficiency of a boiler. CONSTITUTION: A burner device for burning byproduct gas in a iron manufacturing plant is composed of a main body(100) protruding from a combustion chamber(F), a division plate(170) dividing the inside of the main body, a heavy oil burner housing having an igniter(120), an inner pipe(160) fixed on the back surface of the division plate, a combustion air supply port(190) formed along the outer peripheral surface of the main body to communicate with the inner pipe, a control damper(200) for opening/closing the combustion air supply port, and a plurality of nozzles connected to supply pipes(132,142,152) for the byproduct gas.

Description

BURNER DEVICE FOR COMBUSTION INCIDENTAL GAS IN IRON WORKS}

The present invention relates to a burner capable of smoothly burning various types of gases produced by the steel mill operation process, and more particularly, the blast furnace in the process of burning the BFG by-product from the blast furnace, LDG generated in the steelmaking process The present invention also relates to a burner device for burning by-product gas of an ironworks, which is improved to continuously burn while securing embers even when low calorific fuel is supplied due to a severe fluctuation of calorific value in steelmaking industry.

In general, steam generation boilers in steel mills produce steam using BFG (BLAST FURNACE GAS), COG (COKES OVEN GAS), and LDG (LINZ DONAWTS GAS). Gas is not only burned in the burner according to the characteristics of each fuel because the gas composition is different in fuel composition and gas calorific value is different as well as by-products. In particular, in order to burn low calorific value BFG and LDG, high calorific value COG and heavy oil must be mixed and combusted for embers.

Therefore, each BFG and LDG burner must be equipped with a supplementary burner which is equipped with auxiliary equipment such as a fuel supply device, a combustion air supply device and an ignition device. Also, when extinguishing the supplementary burner, the BFG and LDG burners must be installed. The burners must also be configured to be extinguished together. Typically, a COG burner was used for the supplementary burner.

However, since the amount of COG in the by-product gas of steel mills varies from time to time, the use of COG as a complementary fuel is very fluid.In case of shortage, COG is used as a substitute fuel to burn BFG and LDG. That is, as much energy waste as heavy oil is used.

In addition, if the temperature in the boiler furnace is maintained higher than the ignition temperature of BFG and LDG during normal operation of the boiler, supplementary fuel is also burned during combustion, and unnecessary operation operation and BFG and LDG, which are the main burners in case of failure of the supplementary burner, also occur. There was a problem such as not burning.

The present invention has been made in view of the above-described problems of the prior art, which was created to solve this problem, and burns high-heating COG and heavy oil, which are complementary fuels, in the burner for burning low-heating BFG and LDG by-products produced in steel mills. By combining the characteristics of the burner organically to provide a new type of burner, it is possible to point and extinguish the supplementary fuel in accordance with the boiler's furnace temperature conditions, and also to burn the COG flexibly according to the COG generation situation. It is an object of the present invention to provide a burner device for burning by-product gas of an ironworks in which the combustion efficiency of the boiler is improved.

1 is a partially cutaway perspective view of a burner device according to the present invention;

2 is a partial cross-sectional view of the burner device according to the present invention;

Figure 3 is an exemplary view showing a transfer means of the control damper constituting the burner device according to the present invention.

Explanation of symbols on the main parts of the drawings

100 .... body 110 .... heavy oil supplement burner housing

112 .... Air Turn 120 .... Ignition Machine

130 .... COG complementary chamber 132 .... COG supply piping for complementary burner

136 .... COG spray nozzle 140 .... LDG supply chamber

142 .... LDG supply piping 146 .... LDG spray nozzle

150 .... BFG supply chamber 152 .... BFG supply piping

156 .... BFG injection nozzle 160 .... Inner tube

170..Separation plate 180..Body fixing member

190..Combustion air supply port 200 .... Adjustment damper

220 ...... rack 230 ...... pinion

The above object of the present invention is a cylindrical body protruding from the combustion chamber for burning the by-product gas of the steel mill; A separation plate which is fixed to the inside of the front end of the body to be inclined and partitions the inside of the body; A housing for a heavy oil supplement burner having an igniter disposed in a center thereof from the front end surface of the body to the combustion chamber; An inner tube fixed to the rear surface of the separating plate and installed with a play in the body to extend toward the combustion chamber; A combustion air supply port formed adjacent to the combustion chamber side at a predetermined interval along the outer circumferential surface of the body and in communication with the inside of the inner tube; A control damper fitted to an outer circumferential surface of the body and installed to be movable in a longitudinal direction of the body to open and close the combustion air supply port; By-product gas burner of a steel mill comprising a COG, LDG, BFG injection nozzles connected to the inside of the body so as not to be mixed with each other and connected to the combustion chamber, respectively, and extending to the combustion chamber side. By providing a device.

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

1 is a partially cutaway perspective view of the device of the present invention, and FIG. 2 is a cross-sectional view of the device of the present invention.

As shown in Figures 1 and 2, the present invention is provided with a cylindrical body 100 to form the appearance of the burner, the body 100 protrudes with a sufficient length from the inlet of the combustion chamber (F).

The oil supplementary burner housing 110 is fixed to the center of the protruding end surface of the body 100 and extends in the longitudinal direction across the body 100 and is connected to the combustion chamber F, and the oil supplementary burner housing is fixed. An igniter 120 is disposed adjacent to and parallel to 110.

In addition, a cylindrical COG complementary burner chamber 130 is fixed to the inner surface of the front end of the body 100 in the form of surrounding the heavy oil supplement burner housing 110 and the igniter 120, and the chamber 130 for the COG supplement burner 130 is fixed. ), The supplementary burner COG supply pipe 132 connected to the COG supply line through the front end surface of the body 100 to be in communication with the inside is provided with a connection flange 134.

In addition, in the distal end of the body 100, a disk-shaped separation plate 170 which seals inclinedly with the rear side of the chamber 130 for the COG supplementary burner is inclined and welded to partition the space.

In this way, the inner space of the front end of the body 100, that is, the outer space of the chamber 130 for COG complementary burner partitioned by the separation plate 170 naturally forms the LDG supply chamber 140, A portion of the outer circumferential surface of the body 100, the LDG supply pipe 142 in communication with the LDG supply chamber 140 is provided with a connecting flange 144.

Meanwhile, an inner tube 160 fixed to the separating plate 170 is disposed toward the rear side of the separating plate 170 of the body 100, that is, from the separating plate 170 toward the combustion chamber F side.

Therefore, the outer space of the inner tube 160, that is, the annular space between the inner tube 160 and the body 100 forms the BFG supply chamber 150, and a portion of the outer circumferential surface of the body 100 The BFG supply pipe 152 communicating with the BFG supply chamber 150 is disposed with the connection flange 154.

In addition, a body fixing member 180 protruding from the body fixing member 180 is formed at the central part of the protruding length of the body 100 to fix it to an installation place along its outer circumferential surface, and toward the combustion chamber F side from the body fixing member 180. The outer circumferential surface of the 9100 is approximately 90 ° and a plurality of, preferably four combustion air supply holes 190 communicate with the inside through the inner tube 160 without passing through the BFG supply chamber 150. It is possibly formed.

In addition, the outer circumferential surface of the body 100 is moved left and right in the combustion chamber (F) side direction to the body fixing member 180 side while opening and closing the combustion air supply port 190 to supply the amount of combustion air supplied through it. Adjustable damper 9200 is installed.

In addition, the inside of the inner tube 160 penetrates through the separation plate 170, one end is in communication with the COG supplementary burner chamber 130, and the other end is a COG spray nozzle 136 exposed to the inlet of the combustion chamber (F) This is excreted.

The COG injection nozzle 136 is preferably disposed at intervals of 180 ° in the circumferential direction of the separation plate 170 with the heavy oil supplement burner housing 110 and the igniter 120 interposed therebetween.

In addition, a plurality of LDG spray nozzles 146 having one end communicated with the LDG supply chamber 140 and the other end exposed to the inlet of the combustion chamber F are disposed in the separation plate 170.

The LDG spray nozzle 146 is disposed together with the COG spray nozzle 136 along the circumferential direction of the separation plate 170.

A BFG spray nozzle 156 is also formed at the inlet end of the combustion chamber F of the BFG supply chamber 150.

In particular, the inlet side end of the combustion chamber (F) of the injection nozzles (136, 146, 156) is disposed on the same plane with the end of the oil supplementary burner housing (110), the end of the oil supplementary burner housing (110) is an air turning The machine 112 is installed.

Here, the heavy oil supplement burner housing 110 is a supplementary means for supplying heavy oil as an alternative fuel when the by-product gas produced in the steel mill is interrupted to ignite and burn through the igniter 120 having the ignition means To be used.

In addition, a cylindrical burner tile 210 is installed at an end of the inner tube 160 at which the nozzle end is positioned to protect the outer nozzle by the high-calorie fuel combustion of the central burner.

As shown in Figure 3, the control damper 200 is fixed to one end of the rack 220 disposed on both sides of the body 100, the rack 220 is meshed with the pinion 230, the pinion 230 Is fixed to the rotating shaft of the drive motor 240, respectively, the forward and reverse rotation is installed to drive.

Although not illustrated, an on-off valve is provided on each of the by-product gas supply pipes to control and supply fuel that can be ignited or extinguished depending on whether the supplementary burner is burned, and recognizes the open / close state of the igniter 120 and the control damper 200. Each sensor or limit switch can be installed, and each of them is preferably connected to a PLC, which is an automatic controller generally known in the art, and configured to automatically program-control their states.

The operating relationship of the present invention made of such a configuration is as follows.

COG heavy oil supplement burner fuel supply valve (not shown) that is pre-ignited and burned to secure embers when burning low-heat BFG and LDG, and when the COG introduced through the supplementary burner COG supply pipe 132 opens the COG injection nozzle 136. Through the injection into the combustion chamber (F), when the ignition completion signal is received from the control unit is able to ignite the BFG, LDG while satisfying the BFG, LDG ignition conditions.

For example, when the BFG and LDG ignition buttons are pressed, the ignition completion signal of the supplementary burner is recognized to recognize that the embers are secured. Then, a BFG supply valve (not shown) is opened, and the BFG flows into the BFG supply chamber 150, thereby igniter 120 The combustion occurs in the combustion chamber (F) by the ignition of).

When 60 seconds have elapsed after the BFG ignition completion signal is received by the control unit, even if the COG and the heavy oil supplement burner are extinguished, BFG alone combustion conditions are formed and the COG by-product can be used without digestion even if the by-product amount is insufficient.

In addition, it is possible to form flames through two or three nozzles by one combustion so that the nozzle end of the COG complementary burner forms a turbulent flame in laminar flame spraying, so that low calorific value BFG and LDG can be generated even with a small amount of COG combustion. It is possible to enable combustion.

In addition, in the present invention, the description of the supply of by-product gas and the flow passage thereof will be omitted since it is sufficiently shown in the above-described configuration.

As described in detail above, the present invention enables the combustion of gases such as BFG and LDG, which have low calorific value, without the use of heavy oil, even with only a small amount of COG in the by-product gas of the steel mill, thereby maximizing the energy efficiency as well as the thermal efficiency of the steam generating boiler. You can do it.

Claims (3)

A cylindrical body 100 protruding from the combustion chamber F for burning the by-product gas of the steelworks; A separator plate 170 fixed to the inside of the front end of the body 100 to be inclined to partition the inside of the body 100; A housing for a heavy oil supplement burner (110) having an igniter (120) disposed at a center thereof through a separation plate (170) from a front end surface of the body (100); An inner tube 160 fixed to the rear surface of the separating plate 170 and installed with a play in the body 100 to extend toward the combustion chamber F; A plurality of combustion air supply holes 190 formed adjacent to the combustion chamber F side at a predetermined interval along the outer circumferential surface of the body 100 and in communication with the interior of the inner tube 160; A control damper 200 fitted to an outer circumferential surface of the body 100 and installed to be movable in the longitudinal direction of the body 100 to open and close the combustion air supply port 190; Consists of the COG, LDG, BFG injection nozzles (136, 146, 156) connected to the COG, LDG, BFG supply pipes (132, 142, 152) that are partitioned so as not to mix with each other inside the body (100) and extended to the combustion chamber (F) side, respectively. Burner device for the by-product gas combustion of the steel mill, characterized in that the. The method of claim 1, The heavy oil supplement burner housing (110) is a burner device for burning by-product gas of an ironworks, characterized in that an air swirler (112) is attached to the nozzle end thereof piped to the inlet side of the combustion chamber (F). The method of claim 1, The control damper 200 is fixed to the rack 220 disposed on both sides along the longitudinal direction of the body 100, The rack 220 is meshed with the pinion 230, The pinion 230 is a burner device for the by-product gas combustion burner, characterized in that the stationary rotation is fixed to the rotating shaft of the drive motor 240 capable of moving.