KR20040051687A - An apparatus for perceiving cooling water leak in a valve of a hot gas line and cooling the valve further - Google Patents

Abstract

PURPOSE: A device for detecting the coolant leakage and auxiliary cooling through a valve of a high temperature gas line is provided to previously prevent the equipment accident by quickly detecting the coolant leakage. CONSTITUTION: A device for detecting the coolant leakage and auxiliary cooling through a valve of a high temperature gas line(L) comprises a water tank connected to a coolant pipe(140) of a valve(100) installed to the high temperature gas line and filled with a coolant; a gas bubble generating unit installed in the water tank to induce the bubble generation caused by a gas contained in the coolant; a drain part connected to the gas bubble generating unit; a gas discharging part installed to an upper part of the water tank to discharge the gas(G); a detecting part for coolant leakage of the valve, having an observation tool installed to a center of the water tank for observation of the gas bubble; an inert gas pipe connected to a supply part of the coolant pipe; and a cooling part having a gas drain pipe installed to the water tank.

Description

Coolant leakage detection and auxiliary cooling system through valve of hot gas line {AN APPARATUS FOR PERCEIVING COOLING WATER LEAK IN A VALVE OF A HOT GAS LINE AND COOLING THE VALVE FURTHER}

The present invention relates to an apparatus for detecting cooling water leakage through a valve for controlling the flow of a gas line through which hot gas flows in a steel mill, and at the same time, enabling auxiliary cooling. The furnace is designed to control the flow of gas in the gas line through which hot gas flows. When the plug valve seating is broken and the coolant leaks through it, the furnace detects it quickly and explodes due to the leaked coolant. Valve of a hot gas line that prevents safety accidents in advance, and has an auxiliary cooling device for supplying inert gas instead of the coolant leaking to the seating ring in which the coolant flows, so that the hot gas line can be stably operated. The present invention relates to a cooling water leak detection system and an auxiliary cooling device.

The steel plant is equipped with a gas line for transporting hot gases. For example, a gas line that allows the conversion of COREX and FINEX operations is required. In the valve for controlling the flow of gas, for example, a plug valve (Plug Valve) is installed, Figures 1 and 2 schematically show a plug valve installed in such a gas line.

That is, as shown in Figs. 1 and 2, the plug valve 100 is installed in the gas line (L) through which the high-temperature gas flows, the opening and closing disk 110, which is raised and lowered as the driving cylinder 112, the housing ( It is disposed in the 120, the disk 110 is in contact with the seat ring 130 is installed in the housing 120 when the lowering blocks the flow of gas, when the disk 110 is raised the seat ring 130 inside The hot gas passes through the opening portion of and maintains the gas flow.

However, in the plug valve 100 as described above, since the seat ring 130 and the disk 110 which are in contact with the hot gas are easily deteriorated due to high heat, in order to prevent this and precisely adjust the flow of the gas, Cooling water is installed to circulate, the valve 100 is connected to the cooling water pipes 140 for such cooling water circulation, the cooling water pipe 140 is provided with an on-off valve (V) for adjusting the flow of the cooling water is installed , The main cooling water pipe 142 is connected.

1 and 2, when the seat ring 130 or the disk 110 is damaged in the plug valve 100 installed in the hot gas line L, the coolant circulated therein Leakage to the gas line (L) side through the damaged part, in this case, steel mill operation, for example, when the cooling water flows into the reduction furnace along the gas flow in the operation of Corex or Finex unstable operation, exploding in severe cases, etc. There was a problem that caused serious operation and equipment accidents.

However, in the related art, it is difficult to quickly detect the leakage of the coolant through the valve 100 immediately, and if it is found, the plug valves 100 must be replaced in the gas line L, so that the normal operation of the gas line is performed. With this interruption, the actual Korex or Finex operating productivity is reduced.

That is, in the related art, there is no device or method that can detect the cooling water leakage from the plug valve 100 when it is introduced into the reduction furnace in advance. It is determined that the cooling water is leaked, and the operation is adjusted, and the operation of the gas line L is stopped for a long time according to the valve replacement, thereby lowering the COREX or FINEX operating productivity.

The present invention has been made in order to improve the various problems as described above, the object of the present invention is to quickly detect the leakage of the coolant through the valve installed in the hot gas line, such as steel mills, the operation instability by the leaked coolant and In order to prevent large-scale equipment accidents such as explosions, and at the same time to supply the inert gas instead of the cooling water to enable auxiliary cooling to maintain the operation of the gas line, to improve the overall gas line operation rate and operation productivity The present invention provides a cooling water leak detection and auxiliary cooling device through a valve of a hot gas line.

1 is a schematic view showing a cooling structure of a plug valve installed in a general hot gas line

Figure 2 is a schematic diagram showing a plug valve installed in the hot gas line

Figure 3 is an overall configuration showing the cooling water leak detection and auxiliary cooling device through the valve of the hot gas line according to the present invention.

Figure 4 is a detailed configuration diagram showing a cooling water leak detection device through the valve of the hot gas line of the present invention

Explanation of symbols on the main parts of the drawings

1 .... Coolant leak detection and auxiliary cooling system

20 .... Gas bubble generating means

40 .... gas exhaust pipe 50 .... observation port

60 .... Coolant leakage detector 70 .... Inert gas pipe

80 .... Silence 90 .... Auxiliary Cooling Unit

100 ... Valve 140 ... Coolant line

G ... gas G 'gas gas bubbles

G ".... Inert gas L .... Gas line

L '.... Inert Gas Line

As a technical configuration for achieving the above object, the present invention is connected to the cooling water pipe of the valve installed in the hot gas line and the tank filled with the cooling water,

Gas bubble generating means installed in the water tank to induce bubble generation by the gas contained in the cooling water;

A drain portion connected to the gas bubble generating means;

A gas discharge pipe installed to discharge the gas discharged from the upper part of the water tank,

Cooling water leak detection unit in the valve having a viewing port is installed to observe the gas bubbles in the center of the tank:

An inert gas pipe connected to a supply side of the valve cooling water pipe;

Auxiliary cooling unit having a gas drain pipe installed in the water tank: by providing a coolant leak detection and auxiliary cooling device through a valve of a hot gas line configured as.

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

3 is an overall configuration diagram showing a coolant leak detection and auxiliary cooling device through the valve of the hot gas line according to the present invention, Figure 4 is a detailed configuration showing a coolant leak detection device through the valve of the hot gas line of the present invention It is also.

First, the coolant leak detection and auxiliary cooling device 1 through the valve of the hot gas line of the present invention can be largely divided into the coolant leak detection unit 60 and the auxiliary cooling unit 90 in the valve, such as Looking at the components 60, 90 of the present invention in detail as follows.

Next, FIGS. 3 and 4 illustrate a coolant leak detection unit 60 through the valve of the hot gas line of the present invention and the coolant leak detection unit 60 at the valve of the auxiliary cooling device 1. The leak detection unit 60 is connected to the cooling water pipe 140 of the valve 100 installed in the gas line L through which the hot gas flows, and the water tank 10 in which the cooling water 12 is filled, and the water tank ( 10, the gas bubble generating means 20 installed in the water tank 10, the gas bubble generating means 20 and the gas bubble generating means 20 to induce bubble generation (G ') by the gas contained in the cooling water 12 to be filled in The drain 30 is connected to the upper portion of the water tank 10, the gas discharge pipe 40 for discharging the gas (G) discharged bubbles, and the gas bubble (G ') is installed in the center of the water tank (10) ) Is configured as an observation port 50 for observing ().

That is, the water tank 10 of the coolant leak detection unit 60, as shown in Figure 1, the cooling water in the seat ring 130 and the disk 110 of the plug valve 100 of the hot gas line (L), respectively The coolant supply pipe 14 connected to the valve coolant pipe 140 connected to circulate the water is inserted into the cylindrical body so that the coolant 12 is filled, and the water tank 10 of the present invention is illustrated in FIG. 4. As shown in the figure, the upper and lower frames 16a and 16b are firmly provided.

In addition, the gas bubble generating means 20 is installed perpendicular to the inner center of the water tank 10, the cooling water inlet 20a is disposed higher than the lower outlet 14a of the cooling water supply pipe 14 and the water tank (10) It is connected to the drain portion 30 of the lower portion is formed in the form of a reverse cooling water through-pipe configured to generate bubbles (G ') of the gas contained while the cooling water is discharged back.

Accordingly, the seat ring 130 and the disk 110 of the valve 100 are damaged in the coolant 12 supplied through the coolant pipe 140 in the water tank 10, and thus the gas line L may be damaged. When the gas G is included in the cooling water 12 filled in the water tank 10, the cooling water 12 has a flow discharged to the drain portion 30 through the cooling water passage 20 while being flowed back. Therefore, at this time, the gas G included in the cooling water 12 is bubbled G 'to detect that the cooling water leak occurs in the seat ring 130 or the disk 110 of the valve 100 through the gas inflow. Do it.

Next, as shown in FIGS. 1 and 3, the drain part 30 includes a drain part 32 and a drain pipe 34 connected to or drained from the cooling water pipe 140 side.

In addition, the observation port 50 is composed of a projection end 52 integrally protruding from the central both sides of the water tank 10, and a glass window 54 provided to seal the projection end 52, and eventually When the observer observes the gas bubble G 'caused by the gas introduced into the water tank 10 in the state in which the coolant is leaked due to the gas inflow in the water tank 10, that is, the valve is broken, the cooling water in the valve 100 By detecting leakage, the inlet valve V of the coolant pipe 140 is operated to stop the supply of the coolant, and to operate the auxiliary cooling unit 90 to be described later.

Next, FIGS. 3 and 4 illustrate the auxiliary cooling unit 90 of the cooling water leak detection and auxiliary cooling device 1 through the valve of the hot gas line of the present invention, and the auxiliary cooling unit 90 of the present invention as described above. ) Is configured as an inert gas pipe 70 connected to the supply part 142 side of the valve cooling water pipe 140 and a silencer 80 installed in the gas drain pipe 82 installed in the water tank 10. have.

That is, as shown in Figures 3 and 4, the auxiliary cooling unit 90 of the present invention, the inert gas pipe 70 and the valve cooling water pipe 140 and the connection pipe 14 connected thereto, and the water tank ( 10) and the gas drain pipe 82 is connected to form an inert gas line (L '), and thus, when the coolant leaks detected, the operator opens the valve (V) of the inert gas pipe 70, the cooling water pipe ( When the inlet valve V of the 140 is sealed to supply inert gas, that is, nitrogen gas, the supplied nitrogen gas flows to the inside of the water tank 10 along the circulation passage between the valve seat ring 130 and the disk 110. In this case, while the supply of the cooling water is blocked in the water tank 10, the nitrogen gas which is the inert gas is discharged to the atmosphere through the siren 80, and the worker detects the flow of the inert gas by the warning sound generated at this time.

At this time, the supplied inert gas (G ") is a significantly lower temperature than the valve seat ring 130 and the disk 110 in contact with the hot gas, and thus has a cooling function. By carrying out the operation of the hot gas line (L) with the operation of Corex or Finex to maintain a stable.

Meanwhile, in FIG. 3 and FIG. 4, each of the pipes is provided with valves V for adjusting the flow of the coolant and the inert gas flowing through the pipes. These valves are electronically operated valves (not shown). Automatic operation through).

On the other hand, the water tank 10 is composed of a configuration in which a pressure gauge (84) for detecting the pressure of the inlet gas (G) and the supplied inert gas (G ") by the leakage of the cooling water from the valve (100).

Referring to the operation of the present invention made in the above configuration in detail as follows.

3 and 4, the internal parts 110 and 130 of the valve 100 installed to control the flow of the gas in the gas line L through which the hot gas G flows are heated by heat. When the coolant leaks through the burnout, it is quickly detected to prevent safety accidents such as explosion caused by the leaked coolant, and the auxiliary cooling device for supplying the inert gas stably maintains the high temperature gas line. Cooling water leak detection and auxiliary cooling device (1) through the valve of the hot gas line of the present invention to operate is as follows.

The apparatus 1 of the present invention is composed of a pair installed respectively on the seat ring 130 and the disk 110 side of the valve 100, in order to detect whether the coolant 12 is leaking, first the disk and seat Opening the valve (V) installed in the coolant pipe 140 of the ring to circulate the coolant 120 through the seat ring 130 and the disk 110 of the valve 100 to the water tank (14) through the connecting pipe (14). 10) flow into.

At this time, the pressure in the water tank 10 through the pressure gauge 84 provided in the water tank 10 is adjusted through the drain 30 so that the pressure in the gas line L is specifically lower than the internal pressure of the operation reduction furnace, and then the water tank ( Cooling water 12 is introduced into 10).

Therefore, the introduced coolant 12 flows from the outlet 14a of the connecting pipe 14 to the inlet 20a of the pipe 20 through the gas bubble generating means 20, that is, the cooling through-hole 20. Since the gas flows countercurrently, if gas G is contained in the cooling water 12, that is, if the valve is damaged and leaks and gas is flowing through the damaged portion, the gas bubble (10) in the water tank (10) G ') is generated.

Therefore, when the operator detects this in the observation port 50 and determines that the coolant is leaking from the valve 100, immediately operating the valve V of the coolant pipe 140 to cut off the supply of the valve 100 of the coolant. At the same time, the valve V of the inert gas pipe 70 is opened to supply nitrogen gas to the seat ring 130 and the disk 110 of the valve 100, wherein the supplied nitrogen gas G ″ is a cooling water pipe ( The coolant 12 flows into the discharged water tank 10 through the connection pipe 14 and 140, and is discharged through the gas drain pipe 82 and the silencer 80, which is generated from the silencer 80. A beep can be used to determine the flow of inert gas.

On the other hand, the gas rising from the gas bubble (G ') generated in the cooling water 12 in the water tank 10 is discharged through the gas discharge pipe 40 above the water tank 10 to maintain the pressure in the water tank 10 In this case, when the inert gas (G ") is supplied to the non-discharged cooling water 12 in the water tank 10 is to be discharged to the outside through the gas discharge pipe (40).

Accordingly, according to the coolant leak detection and auxiliary cooling device 1 through the valve of the hot gas line of the present invention, the coolant 12 is primarily detected to leak from the valve 100, which is the valve 100. When the coolant is leaked from the seat ring 130 or the disk 110 of the high pressure gas (G) through this flows into the water tank 10 through the cooling water line 140, the gas generated in the water tank 10 It is detected through the bubble (G ').

Next, when gas bubbles are observed, nitrogen gas (G "), which is an inert gas, is supplied instead of the cooling water to maintain the cooling of the valve while preventing equipment accidents such as operation instability and explosion due to continuous leakage of the cooling water.

As described above, according to the present invention, a coolant leak detection device through a valve of a hot gas line, when coolant leaks through a valve installed at a hot gas line, such as an ironworks plant, detects the coolant quickly and prevents operation instability and explosion due to leaked coolant. It provides an advantage that makes it possible to prevent large equipment accidents in advance.

In addition, according to the valve auxiliary cooling device of the hot gas line of the present invention, by supplying an inert gas instead of the coolant supplied through the valve to enable the auxiliary cooling of the valve, it is possible to maintain the operation of the gas line at all times. have.

Therefore, according to the present invention, the cooling water leak detection and auxiliary cooling device through the valve of the gas line, smooth operation of a considerable amount of hot gas lines used in steel mills to increase the operation rate, in particular, through the gas line or Corex or It is to provide an excellent effect to keep the operation of Finex disease stable and improve its productivity.

While the invention has been shown and described with respect to specific embodiments thereof, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit or scope of the invention as set forth in the claims below. I would like to know that those who have knowledge of this can easily know.

Claims (4)

A water tank 10 connected to the cooling water pipe 140 of the valve 100 installed in the hot gas line L and filled with the cooling water 12 therein, A gas bubble generating means (20) installed in the water tank (10) to induce bubble generation (G ') by gas (G) included in the cooling water (12), A drain portion 30 connected to the gas bubble generating means 20, A gas discharge pipe (40) installed to discharge the gas (G) that is bubble-released in the upper portion of the water tank (10) Cooling water leak detection unit 60 in the valve 100 having an observation port 50 installed to observe the gas bubble (G ') in the center of the water tank (10): And, An inert gas pipe 70 connected to the supply part 142 side of the valve cooling water pipe 140; Auxiliary cooling unit (90) having a gas drain pipe (82) installed in the water tank (10): Coolant leakage detection and auxiliary cooling device through the valve of the hot gas line, characterized in that configured as According to claim 1, wherein the water tank 10 of the coolant leak detection unit 60 is installed so that the coolant supply pipe 14 connected to the valve coolant pipe 140 is inserted through the top to fill the coolant, The gas bubble generating means 20 is installed perpendicular to the inner center of the water tank 10, the cooling water inlet 20a is disposed higher than the lower outlet 14a of the cooling water supply pipe 14 and the water tank 10 Cooling water leak detection and auxiliary cooling device through the valve of the hot gas line, characterized in that connected to the drain portion 30 of the lower portion is configured to generate a gas bubble (G ') through the discharge of the reverse flow of the cooling water According to claim 1, The observation port (50) protruding end (52) integrally protruding from both sides of the center of the water tank (10); And a glass window 54 installed to seal the protruding end 52; to observe a gas bubble G 'in the water tank 10 to observe gas inflow due to leakage of cooling water from the valve. The drain unit 30 is a coolant leak detection and auxiliary cooling device through the valve of the hot gas line, characterized in that consisting of the drain pipe 32 and the drain pipe 34 According to claim 1, wherein the auxiliary cooling unit 90, the inert gas pipe 70, the valve cooling water pipe 140 and the connection pipe 14 connected thereto, and the inert gas line (L ') as the water tank (10). ) Is formed to subcool the valve 100 as an inert gas, Cooling water leak detection and auxiliary cooling device through the valve of the hot gas line, characterized in that the pressure gauge 84 for detecting the internal pressure is installed in the water tank (10).