KR200222656Y1 - Apparatus for alarming the leakage of oil from burner of boiler for electricity generating facilities - Google Patents

Abstract

This design makes it easy to monitor and confirm the leakage of fuel oil in the combustion air box that is not directly accessible to the operator during operation and is not visible to the naked eye. The present invention relates to a heavy oil burner leakage oil alarm device for a power generation boiler that can prevent equipment accidents and safety accidents in advance.

The present invention, in the device for detecting the leakage oil leaked from the combustion air box during combustion of heavy oil fuel of the power generation boiler, provided with a collector for collecting the middle stream falling from the heavy oil drop point of the air box, It is equipped with a sensor that detects the presence of heavy oil and transmits an electrical signal to the outside, and has a lamp and a buzzer for outputting the signal from the sensor to the outside to automatically remotely leak the leakage oil leaking from the combustion air box It provides a heavy oil burner leakage oil alarm of the power generation boiler configured to detect.

Description

Heavy oil burner leakage oil alarm device for power generation boilers {APPARATUS FOR ALARMING THE LEAKAGE OF OIL FROM BURNER OF BOILER FOR ELECTRICITY GENERATING FACILITIES}

The present invention relates to a device for detecting leaked oil leaking from a combustion air box during combustion of heavy oil fuel of a power generation boiler. More specifically, combustion air in a position that is not directly accessible to the operator and invisible to the naked eye during operation. It is possible to easily monitor fuel oil leakage in the box to prevent fire and explosion accidents in the air box in advance, and to prevent oil accidents and safety accidents of heavy oil burners in power generation boilers. Relates to a device.

In general, power generation facilities in steel mills use by-product gases (BFG, COG, LDG) and heavy oil generated during the steelmaking process as fuels to heat boilers and generate electricity by rotating turbines using the generated steam. The conventional boiler 100 as shown in FIG. 1 has a burner 120 for burning fuel to one side of the furnace inner side 110 to mix gas and heavy oil with high temperature air, and use the boiler 100 with them. In the furnace to heat the furnace.

In this process, heavy oil fuel cannot be used for combustion due to various reasons, and leaks to the outside. That is, the heavy oil 125 falls and leaks due to the blockage of the heavy oil tip (TIP) 122 of the burner 120, the tip portion protruding, the poor clearance, the poor supply of the injection steam for supplying the heavy oil, and the like. Flowing into the inside of the air box 130 surrounding the burner 120 to supply combustion air to the burner 120 is stagnant and exploded while evaporating by hot heat, causing dangerous equipment accidents.

However, conventionally, since the inside of the air box 130 of the burner 120 cannot be inspected during the operation of the boiler 100, flame monitoring or carbon production from air after combustion is monitored indirectly. In this way, it was not possible to quickly detect and cope with the leakage of heavy oil.

Therefore, in the related art, after the explosion accident occurred in the air box 130, there is a problem that only the following actions can be taken.

The present invention is to solve the above conventional problems, the purpose of

During the operation of a power plant boiler, it quickly detects whether heavy oil leaks due to a heavy oil fuel system abnormality and outputs it to the outside in an air box that is inaccessible to the naked eye and prevents fire and explosion accidents in the air box. It is to provide a heavy oil burner leakage oil alarm device of a power generation boiler that can prevent equipment accidents and safety accidents in advance.

1 is a block diagram showing a state in which heavy oil leaks in the boiler for power generation according to the prior art;

2 is a block diagram of a heavy oil burner leakage oil alarm device according to the present invention mounted on the boiler for power generation;

3 is a configuration diagram showing a state in which the bimetal switch is turned on in the heavy oil burner leakage oil alarm of the power generation boiler according to the present invention;

Figure 4 is a block diagram showing a state in which the bimetal switch is turned off (off) in the heavy oil burner leakage oil alarm of the power generation boiler according to the present invention.

Explanation of symbols on the main parts of the drawings

5 ..... Information 10 ..... Dust collector

15 .... Transparent sample stand 17 ..... Bracket

20 .... Sensor 22 .... Photosensitive element

25 .... light source bulb 30 ..... alarm

36 .... cooling air line 50 ..... switch

52 .... iron strip 54 .... copper strip

64 .... Lamp 66 ..... Buzzer

68 .... Power 85 ..... Lock Handle

100 ... boiler 120 ..... burner

130 ... air box

In order to achieve the above object, the present invention, in the device for detecting the leakage oil leaked from the combustion air box during the combustion of heavy oil fuel of the power generation boiler, the oil collector for collecting the middle stream falling from the heavy oil drop point of the air box And a sensor for detecting the presence of heavy oil in the oil collector and transmitting an electrical signal to the outside, and having a lamp and a buzzer for outputting a signal from the sensor to the outside. By providing a heavy oil burner leakage oil alarm device for a power generation boiler configured to remotely and automatically detect the leakage oil.

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

As shown in FIG. 2, the heavy oil burner leakage oil alarm device 1 of the power generation boiler according to the present invention is leaked oil as a detection means for detecting leakage oil at a leak location of the heavy fuel burner of the burner 120. There is a guide piece (5), which is located between the burner body (120a) and the furnace wall (120b) has a collection structure for guiding the leaked heavy oil in either direction.

In addition, a funnel-shaped oil collector 10 collecting leakage oil from the guide piece 5 and a transparent sample table 15 for finally identifying the fuel received from the oil collector 10 are disposed at the lower side thereof. These are respectively fixed integrally through the brackets 17 to the furnace wall 120b.

That is, the guide piece 5 is made of iron in the form of an inverted triangle with an edge raised, and a cylindrical funnel-shaped iron collector 10 is located at the lower side thereof, and the glass transparent sample table 15 in which the final leakage oil stays. Together with the bracket 17 on the furnace wall 120b.

In addition, a sensor 20 is arranged so that the leaked oil contained in the transparent sample table 15 can be identified by light, which is composed of the photosensitive element 22 and the light source bulb 25, which will be described later. It is activated to send an electrical signal to the alarm transmitter (30).

That is, the sensor 20 has a light source bulb 25 that emits light on the upper portion of the transparent sample table 15 using the fixing piece 27, and the upper side of the cooling nozzle 32 that is an overheat protector of the bulb 25. The connection is fixed. In addition, a photosensitive element 22 for controlling a current amount is disposed at a lower side of the transparent sample table 15 according to the brightness of light, and is attached to the cooling air pipe 36 using the fixing piece 37, and thereon. An overheat prevention cooling nozzle 34 is attached.

Outside air is supplied to the cooling nozzle 34 through the cooling air pipe 36 to prevent overheating of the light source bulb 25 and the photosensitive device 22.

In addition, the photosensitive element 22 and the light source bulb 25 is electrically connected to the alarm transmitter 30 along a wire (not shown), the conduit 40 for preventing the wire damage is fixed piece 42 It is firmly attached to the floor. On the other hand, the switch 50 is provided inside the alarm transmitter 30 to give a mechanical change by the heat generated according to the amount of current of the photosensitive device 22, the switch 50 is shown in Figs. As described above, the bimetal, that is, the iron piece 52 and the copper piece 54 having different thermal expansion coefficients, are wound around the body, and the nichrome wire 56 is wound and bonded to the fixing bolt 58 after the insulation treatment.

In addition, the alarm transmitter 30 has a structure in which a contact point 60 connected to the bimetal switch 50 and an alarm lamp 64, an alarm buzzer 66, a power source 68, and the like are provided. .

The semi-fixed variable resistor 70 is connected to one end of the nichrome wire 56 in the alarm transmitter 30 and fixed to a terminal, and has an alarm switch contact 60 opposite the bimetal switch 50. , Which is integrally formed by a fixed bolt 58 uniaxially on the fixed base 73 with the bimetal switch 50 at its lower side, and the fixed base 73 is the bottom bottom 75 of the alarm transmitter 30. ) Is firmly fixed with bolts.

In addition, an alarm lamp 64 is configured together with an alarm buzzer 66 at an upper center of the alarm transmitter 30, and a DC power supply 68 terminal is provided below the power supply 68. After being connected to the 77 and the outlet, and the secondary side is connected to the bridge-type diode 79 converting to direct current, the electrolytic capacitor 81 is attached together for power supply smoothing.

And, the front panel of the alarm transmitter 30 is configured to open and close the panel door 87 with the locking handle 85 is attached to the hinge 89, the panel upper side can identify the alarm lamp 64 lights. A rectangular transparent alarm board 92 is attached. Finally, a cylindrical support 96 is firmly attached to the bottom 98 at the lower center of the alarm transmitter 30, and holes 99 are drilled at both ends of the cylindrical support 96 so that wires can pass therethrough.

Hereinafter, the operation and effects of the present invention will be described.

As shown in FIGS. 3 and 4, the present invention collects the heavy oil fuel 125 which leaks and leaks during combustion of the heavy oil burner 120 from the transparent sample stand 15, and the photosensitive element 22 below the sample stand 15. In accordance with the presence or absence of light from the current is applied to the bimetal switch 50, the opening and closing of the contact 60 is made accordingly, the lighting of the alarm lamp 64 and the alarm buzzer 66 so that the inspector can check ) Is supposed to ring.

That is, during normal operation of the heavy oil burner 120, the light emitted from the light source bulb 25 passes through the transparent sample table 15 as shown in FIG. 4, thereby reaching the photosensitive device 22 without any obstacle. Accordingly, since the photoresist 22 has a low resistance value due to light, and a current flows, since the same current flows through the nichrome wire 56 of the bimetal switch 50 connected in series, the temperature rises to increase the temperature of the iron piece 52 and the copper. Since the piece 54 is heated, the piece 54 is inclined toward the iron piece 52 having a low coefficient of thermal expansion. As a result, the contact point 60 is opened and there is no change in the alarm lamp 64 and the alarm buzzer 66.

However, when heavy oil falls by the leakage leakage during the combustion of heavy oil fuel, the heavy oil passes through the guide piece 5 and the oil collector 10, and collects in the transparent sample stage 15 as shown in FIG. At this time, light is blocked by black heavy oil in the photosensitive element 22, and the resistance value of the photosensitive element 22 is increased, so that the current flowing in the bimetallic nichrome wire 56 is lowered, so that the bimetal temperature is also lowered, thereby the bimetal junction metal. It is inclined toward the copper piece 54, the contacts 60 are attached to each other.

As a result, the alarm lamp 64 connected to the contact point 60 is turned on by the current, and the alarm buzzer 66 makes a sound and promptly informs the inspector.

Therefore, according to the present invention, when the burner 120 is operated, when the heavy oil fuel is leaked into an enclosed space inaccessible to the internal inspector, the driver is notified quickly by using the alarm to ignite and The explosion in the burner 120 inside the air box 130 can be prevented in advance, so that a practical effect can be prevented in advance.

Claims (2)

In the device for detecting the leakage oil leaked from the combustion air box 130 during combustion of heavy oil fuel of the power generation boiler 100, the oil collector for collecting the middle stream falling from the heavy oil drop point of the air box 130 ( 10 and a sensor 20 which detects the presence of heavy oil in the oil collector 10 and transmits an electrical signal to the outside, and outputs a signal from the sensor 20 to the outside ( 64) and the buzzer 66 having an alarm transmitter 30, the heavy oil burner leakage oil of the boiler for power generation, characterized in that it is configured to remotely automatically detect the leaking heavy oil leaking from the combustion air box 130 Alarm device. The switch 50 according to claim 1, wherein a switch 50 for mechanically changing by heat generated according to the amount of current of the photosensitive element 22 is disposed inside the alarm transmitter 30, and the switch 50 has a coefficient of thermal expansion. After the different iron pieces 52 and the copper pieces 54 are insulated from the body, the nichrome wire 56 is wound and bonded to the fixing bolt 58, and the contact 60 is disposed at one side thereof. Heavy oil burner leakage oil alarm of the power boiler characterized in that the alarm lamp (64) and the alarm buzzer (66) is operated according to the on-off of the switch (50).