KR950007182Y1 - Drain of hot stove - Google Patents

Abstract

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Description

Discharge device of hot stove burner

1 is a block diagram of a hot stove burner discharge device according to the present invention.

2 is a block diagram of a hot stove burner discharge device according to the prior art.

* Explanation of symbols for main parts of the drawings

1: Manual on / off side 3: Manual discharge side

4: nitrogen (N) side 5: discharge port

5a: overflow pipe 10: discharge pipe

The present invention more efficiently and reliably removes water and lead, and debris and fine powders accumulated at the bottom of the burner, the bottom of the burner gas valve (hereinafter referred to as BGV) and the bottom of the burner air valve (hereinafter referred to as BAV) during hot stove combustion. It relates to a hot stove burner discharge device for discharging to the outside.

The hot blast furnace facility for supplying hot blast (1050-1250 ° C.) to the blast furnace is repeatedly carried out combustion and blowing. First, it burns to accumulate heat storage in the hot stove. After this, the cold air from the burner passes through the heat storage roll and makes a breeze, and sends it to the blast furnace. Enter

Since there can be no interruption in the supply of hot air from the blast furnace, 3-4 hot blast furnaces are installed per blast furnace to secure hot air.In the case of three, one blower, two burners, two blowers and two burn cycles The routine is repeated by automatic control.

The gas used for combustion uses a mixed gas (hereinafter referred to as M-GAS) in which BFG, which is a blast-generating gas, and COG, which is coke oven oven gas, are mixed at a predetermined ratio, and combustion air (hereinafter referred to as AIR) is a burner. Use pressure air produced by a fan. In general, M-GAS contains about 5g / N㎥ of water, and COG contains oil and ammonia. These materials become Mist + oil and ammonia when mixed in the COG mixing chamber to make M-GAS, and when burned, they accumulate in the form of water at the bottom of the burner. It is attached to the surface, which causes a spalling phenomenon, in which the layers become thick and repeat, and when peeled, they also fall with the lead. The air line also accelerates these phenomena as condensate from the compressed air accumulates under the burner.

Therefore, in order to prevent this, the burner lead and the outside are attached with a corrosion-resistant iron plate, and when the combustion is drained water (drain) to the discharge pipe.

Existing discharge device for this purpose is shown in FIG. That is, there are discharge pipes by dividing the discharge points of three burners (M-Gas side, air side, center part) and bottom of BGV and BAV into M-Gas side and air side, and on / off ( On / Off) Automatic valve 1 and gas seal pot 2 are provided.

The reason why the M-Gas side and the air side are installed separately is to prevent explosion by preventing pre-mixing of M-Gas and air. In addition, the on / off automatic valve 1 is interlocked so as to be opened only during combustion, and discharges water accumulated in the lower part of the burner and the bottom of the BGV and BAV during the combustion period. The water was kept out while maintaining the seal.

The on / off automatic valve 1 is closed during blowing, which means that the blowing pressure (3-4 kg / cm 3) of the hot blast furnace is higher than the head pressure of the sealing pot 2, so that the seal is destroyed and the puff wind seal pot ( This is because they are usually ejected via 2).

Problems with the existing discharge device here are as follows.

At the bottom of the burner, fragments and derivatives of smoke and irregular refractory generated by burner vibration during combustion and furnace wall friction during blowing are always collected, which are horizontally mounted on / off automatic valves when discharged with water. It is to make the opening and closing operation impossible by attaching or squeezing on the disc. Then, when opening and closing operation is impossible during operation, each discharge sealing edge (3) is sealed to remove the on / off automatic valve (1) to disassemble and repair, but due to the frequent occurrence of each discharge manual valve (3) In many cases, the system is operated without being closed, and when the on / off automatic valve (1) is not closed in the open state, it is not automatically transferred from combustion to blowing due to the open signal. It can also be disjoint by releasing (Interlock).

The present invention is to solve the above problems, by modifying the existing discharge device to collect separately the smoke and smelt in the discharge water, irregular refractory fragments and fine powder, etc. Hot-burner burner to prevent the opening and closing of the on / off automatic valve The purpose is to provide a discharge device.

In order to achieve the above object, the present invention, the plurality of discharge pipes connected to the lower surface of the hot stove burner are each equipped with a vertical discharge cone port, the inlet and the lower pipe of the discharge port on the manual on / off side and manual In the discharging device of the hot stove burner for discharging the condensate generated in the bottom of the burner of the blast furnace hot stove installation, a discharge pipe is formed in the upper end of one side of the discharge port, the on-off automatic The side is installed, and the upper and lower ends of the on / off automatic valve by providing a discharge device of the hot stove burner, characterized in that the steam or nitrogen valve is installed respectively.

Hereinafter, the discharge apparatus of the hot stove burner according to the present invention will be described in detail with reference to the drawings.

The exhaust device of the hot stove burner according to the present invention, as shown in Figure 1 is a cone type (cone type) vertically installed in the plurality of discharge pipes 10, each of the discharge port 5, the internal pipe is mounted And install the overflow line (5a) on the upper side of the discharge port (5) side, it is installed on the on / off automatic valve (2) vertically. In addition, a manual on / off side (1) is provided at the inlet pipe of the discharge port (5), and a manual discharge side (3) is provided at the lower discharge pipe of the discharge port (5), At the bottom, a steam purge side 4 is installed.

The discharge operation in the above discharge device is as follows.

The discharge during combustion is separated and discharged to the M-Gas side and the air side, and the debris and fine powder of lead and irregular refractory in each discharge port 5 are sludge mixed with water in the bottom of the discharge port 5. At the same time, the water is equally overflowed and exits the seal pot 6 via the on / off automatic valve 2.

At this time, the sludge-type debris and fine powder collected under the discharge port 5 can be transported to a separate waste disposal plant by opening the manual discharge side 3 and can be removed.

In this way, it is possible to prevent fragmentation or narrowing of the disc inside the on / off automatic valve (2) by collecting debris and fine powder of lead and irregular refractory in the discharge port (5). Overflowed together In addition, as the on / off automatic valve 2 is installed vertically, the adhesion is much smaller than the existing horizontal installation.

On the other hand, the steam or nitrogen valve (4) so as to purge the upper and lower ends of the on / off automatic valve (2) as steam or nitrogen in preparation for the disc attachment or narrowing of the on / off automatic valve (2) ), Respectively, and in order to prevent the hassle of closing each manual discharge valve (7), a manual on / off valve (1) was installed in the inlet pipe of the discharge port (5).

As described above, the present invention provides a smooth discharge by preventing the opening and closing of the on / off automatic valve 2, which is a problem of the existing apparatus, by installing the discharge port 5 and the overflow pipe 5a. To protect the smoke inside the burner by blocking the heat, it is very useful in practical use to expect the thermal efficiency improvement effect due to moisture removal.

Claims (1)

The plurality of discharge pipes 10 connected to the lower surface of the hot stove burner are respectively equipped with vertical discharge ports, and the inlet and the lower pipes have a manual on / off side (1) and a manual discharge side (3). In the discharging apparatus of the hot stove burner for discharging and removing the condensed water generated in the bottom of the burner of the blast furnace hot stove installation, the overflow pipe (5a) is formed at the upper end of one side of the discharge port (5), the wall On / off automatic valve (2) is installed in the flow pipe (5a), hot or hot stove characterized in that the upper and lower ends of the on / off automatic valve (2) are respectively installed steam or nitrogen (N) side (4) Burner outlet.