KR101627530B1 - System and method for combusting vaporized flammable gas - Google Patents

Abstract

The present invention relates to a combustion system for a vaporized combustible gas and a control method thereof, the combustion apparatus comprising a combustion chamber having a burner for burning a combustible gas, the combustion apparatus comprising: a first supply line arranged to supply a combustible gas to the combustion chamber; A third supply line connected to the first supply line for supplying an inert gas to the first supply line, and a second supply line connected to the first supply line for supplying self-ignition And a second supply line arranged to supply fuel oil to the burner for burning the combustible gas which can not be burned.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a combustion system for vaporized combustible gas,

The present invention relates to a system for combusting a vaporized combustible gas, and more particularly to a system for burning a combustible gas more stably, maintaining the temperature of the combusted gas below a predetermined temperature, To a combustion system of a vaporized combustible gas and a control method thereof.

Generally, natural gas is made into a state of liquefied natural gas that is liquefied at the cryogenic temperature at the place of production, and then transported over a long distance to the destination by the ship.

Since the liquefaction temperature of liquefied natural gas is cryogenic at -165 ° C at normal pressure, liquefied natural gas evaporates even if its temperature is slightly higher than -165 ° C at normal pressure. The liquefied natural gas is continuously vaporized in the storage tank by the external heat transferred during the transportation, and is converted into a combustible gas (hereinafter referred to as "combustible gas"). When such a combustible gas is generated, the pressure in the storage tank rises and becomes a dangerous state. Therefore, this combustible gas is discharged to the outside of the storage tank to be used as fuel for a ship propulsion engine, a boiler or a generator, or may be discharged by burning.

1, a combustible gas generated in the tank 10 is supplied to the engine 12 of the ship through the fuel line 11 to be used as fuel, as shown in Fig. 1, as an example of a combustion apparatus for processing such a conventional combustible gas. And the extra combustible gas is supplied to the gas combustion device 14 through the combustion line 13 to be burned and discharged to the outside.

As described above, the combustible gas that is necessarily generated in the tank 10 is consumed as fuel or burned and discharged to the atmosphere.

When the combustion temperature in the combustion chamber or the temperature of the exhausted gas exceeds the set limit temperature during normal combustion, the mode is switched to the emergency mode, and immediately after the combustion is stopped or the flow rate of the combustible gas flowing into the combustion chamber is adjusted, If it continues, combustion stops. Further, when the flame in the combustion chamber is not detected at the time of combustion, the combustion of the combustible gas is completed.

Further, an air supply fan is mounted on the lower part of the combustion chamber, and the air flows in from the chamber directly below the combustion chamber.

Korean Patent Publication No. 2010-0123302 (Nov. 24, 2010)

As described above, the apparatus for treating a combustible gas according to the prior art may cause additional damage because the combustible gas flowing into the combustion chamber remains in the supply line after the combustion is stopped in the emergency mode. Further, even if a flame in the combustion chamber is not detected, a combustible gas may be continuously supplied into the combustion chamber, and in this case, there is a problem that the flammable gas is released into the air without a combustion process.

A first object of the present invention developed to solve the above problem is to provide a combustion system for a combustible combustible gas and a control method thereof for supplying an inert gas to a supply line in an emergency mode to release residual combustible gas into the atmosphere .

It is a second object of the present invention to provide a method for controlling a combustible gas by supplying a fuel oil and forcibly operating a burner when a combustible gas is supplied by various sensors even when a flame is not generated due to a low concentration of a combustible gas in a combustible gas, The present invention provides a combustion system for a combustible combustible gas which is continuously burned and a control method thereof.

In order to achieve the above object, a combustion system for a vaporized combustible gas according to the present invention is a combustion apparatus having a combustion chamber in which a burner for burning a combustible gas is incorporated, the combustion apparatus comprising: a first supply arranged to supply a combustible gas to the combustion chamber; Line, a discharge line connected to the first supply line to discharge the combustible gas in the first supply line into the atmosphere in an emergency, and a third supply line connected to the first supply line to supply an inert gas to the first supply line .

And a second supply line arranged to supply fuel oil to the burner to burn the combustible gas supplied to the combustion chamber and not self-ignitable.

The first supply line may further include a flow rate sensor for measuring the flow rate of the combustible gas flowing into the first supply line, a third temperature sensor for measuring the temperature of the combustible gas, a second pressure sensor for sensing the pressure of the combustible gas, A first valve for controlling the flow of the combustible gas passing through the detection sensors, a second valve for blocking the flow of the combustible gas passing through the first valve, and a second valve for controlling the flow rate of the combustible gas supplied to the combustion chamber through the second valve And a third valve for controlling the second valve.

The discharge line is connected between the first valve and the third valve to discharge the combustible gas existing in the first supply line into the atmosphere, and a discharge valve is provided to control the flow of the combustible gas.

The third supply line is connected between the first valve and the third valve or between the second valve and the third valve for supplying the inert gas to the first supply line and the supply valve for controlling the supply of the inert gas .

The combustion unit may include a burner, a combustion chamber in which the burner is incorporated, a first temperature sensor for measuring the combustion temperature of the combustible gas burned in the combustion chamber, a first pressure sensor for sensing the pressure in the combustion chamber, And a second temperature sensor for detecting the temperature of the exhaust gas discharged into the atmosphere after the combustion.

The first supply line is connected to a compression line or an uncompressed line through which the combustible gas vaporized in the storage tank flows.

Meanwhile, a control method for a vaporized combustible gas combustion system according to the present invention is a method for controlling a combustion system for a combustible combustible gas, comprising the steps of operating the fan, opening the first valve, the second valve and the third valve while closing the discharge valve, An initial combustion step (S100) in which combustion is performed by a burner in a combustion chamber while mixing with supplied air; Based on the data measured by at least one of the flow sensor of the first supply line and the second pressure sensor, the first temperature sensor of the combustion section, the first pressure sensor, the second temperature sensor and the flame sensor A combustion sustaining step (S110) in which the combustible gas is continuously burned and discharged in a normal state; When the combustion of the combustible gas is completed, the first valve is closed, the combustible gas remaining in the first supply line is completely burned, the third valve is closed, the combustion is stopped, Completion step S120; With the first valve and the third valve closed, the supply valve of the third supply line is opened so that the inert gas is supplied to the first supply line between the first valve and the third valve, and the discharge valve is opened, (S130), which is discharged into the atmosphere through the air outlet (S130).

At this time, the first valve and the second valve are opened in the initial stage of the combustion, and the third valve is opened while controlling the flow rate of the combustible gas.

The data value measured by the sensor of at least one of the flow sensor of the first supply line and the second pressure sensor, the first temperature sensor of the combustion unit, the first pressure sensor, the second temperature sensor and the flame sensor, (S111) of determining whether the combustible gas can be supplied to the combustion chamber or not if the temperature of the first temperature sensor or the second temperature sensor is changed to the emergency mode Or returning the data value of the sensor to the normal range and returning to the continuous continuation step (S120) when the combustible gas such as the pressure measured by the first pressure sensing sensor is less than or over a certain range can be supplied to the combustion chamber (S112) of adjusting the supply amount of the combustible gas to the three-way valve.

The method may further include determining whether the data value has returned to the normal range (S113), and returning to the continuous continuous step (S120) if the data value is returned.

If the flammable gas such as a malfunction of the fan or a flame detection sensor in the flame detection sensor can not be supplied to the combustion chamber or the data value does not return to the normal range, the discharge step (S130) is performed.

Further, the method further includes a pre-combustion step (S10) in which the combustible gas vaporized in the storage tank is supplied to the first supply line through a compression line or an uncompressed line.

As described above, according to the present invention, when the concentration of the ignitable material in the combustible gas is low and self-combustion is impossible, fuel oil is supplied through the second supply line to operate the burner, thereby enabling the combustible gas to be forcibly burned It is effective.

In addition, if malfunction is detected during combustion by the measured data of various sensors mounted on the first supply line and the combustion unit, it is judged whether or not the combustible gas can be supplied to the combustion chamber. If the supply is possible, Mode. ≪ / RTI >

In addition, when the combustible gas can not be supplied to the combustion chamber due to a malfunction in the combustion, the valve of the first supply line is closed and then the inert gas of the third supply line is supplied to the first supply line to supply the combustible gas in the first supply line There is an effect that it can be rapidly discharged to the atmosphere through the discharge line.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description, serve to further the understanding of the technical idea of the invention, It should not be interpreted.
BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic diagram showing a device for treating a conventional combustible gas. Fig.
2 is a schematic diagram showing a combustion system for a vaporized combustible gas according to the present invention.
Fig. 3 is a configuration diagram showing the combustion apparatus shown in Fig. 2. Fig.
4 is an enlarged view of the combustion section shown in Fig.
5A and 5B are a plan view and a perspective view of the wind box shown in FIG.
Figs. 6A and 6B show a first modification of the wind box shown in Fig. 5A.
Figs. 7A and 7B show a second modification of the wind box shown in Fig. 5A.
8 is an enlarged perspective view of the gas mixing member shown in Fig.
9 is a flowchart showing a method for controlling the combustion system shown in Fig.
10 is a flowchart showing a control method when the control method of FIG. 9 is in the emergency mode.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the detailed description of known functions and configurations incorporated herein will be omitted when it may unnecessarily obscure the subject matter of the present invention.

<Configuration>

2 is a schematic diagram showing a combustion system for a vaporized combustible gas according to the present invention. Fig. 3 is a configuration diagram showing the combustion apparatus shown in Fig. 2. Fig. 4 is an enlarged view of the combustion section shown in Fig. 5A and 5B are a plan view and a perspective view of the wind box shown in FIG. Figs. 6A and 6B show a first modification of the wind box shown in Fig. 5A. Figs. 7A and 7B show a second modification of the wind box shown in Fig. 5A. 8 is an enlarged perspective view of the gas mixing member shown in Fig.

2, a combustion system for a vaporized combustible gas according to the present invention includes a combustion apparatus 100, a storage tank 200 storing a combustible gas, a storage tank 200 connecting the storage tank 200 and the combustion apparatus 100 A compression line 220 connected to the combustion apparatus 100 in the storage tank 200 by a device necessary for the operation of the ship and a compressor 221 and a heater 222 installed in the compression line 220. [ .

The liquefied gas is stored in the storage tank 200 at an extremely low temperature. The liquefied gas is, for example, stored at less than -165 DEG C for liquefied natural gas and less than about 0.25 bar, and the conditions in the liquefied state vary depending on the characteristics of various types of combustible gases. Here, a separate pump for supplying the combustible gas to the uncompressed line 210 or the compressed line 220 may be installed in each line.

The uncompressed line 210 is a line connecting the storage tank 200 and the combustion apparatus 100. The uncompressed line 210 supplies the uncompensated line 210 to the combustion apparatus 100 in the state of the recycled gas vaporized in the storage tank 200. [

The compression line 220 is a line connected to the storage tank 200 to supply the combustion apparatus 100 or the output apparatus requiring the fuel including the engine 230, the boiler 240 and the generator 250. The compression line 220 is provided with a compressor 221 and a heater 222 for processing the combustible gas as a fuel. For example, in the compressor 221, the combustible gas is compressed to about 6 to 10 bar, and the heater 222 is heated to about 0 to 100 ° C. Of course, each of the uncompressed line 210 and the compressed line 220 is provided with a control valve 211 for controlling the supply amount of the combustible gas supplied from the storage tank 200. The compression line 220 is provided with a separate valve for each line so that the combustible gas is separately supplied to the output device such as the combustion device 100 or the engine 230, the boiler 240 and the generator 250 do.

The uncompressed line 210 and the compressed line 220 are connected to the first supply line 131 of the combustion apparatus 100. This will be described later.

3 and 4, the combustion apparatus 100 includes a combustion section 110, an air supply section 120 for supplying air to the combustion section 110, And a supply line unit 130 for supplying fuel oil.

The combustion unit 110 includes a combustion furnace 111, a burner 113, and various sensors for detecting the temperature and flame in the combustion furnace 111.

First, the combustion furnace 111 is provided with a combustion chamber 112 in which a combustible gas is burnt, and a burner 113 is disposed therein. For example, a flue pipe (not shown) may be installed so as to house the combustion furnace 111. In this case, a heat insulating material may be installed between the combustion furnace 111 and the flue pipe, The phenomenon that the high temperature of the furnace 111 is conducted to the outside can be minimized. Of course, it is also possible to block heat conduction by installing insulation, air flow, and water jackets in the absence of a flue tube. Also, a large number of air inlet holes may be formed in the combustion furnace 111 at regular intervals to allow outside air to flow during combustion, and the flame inside the combustion furnace 111 can be visually confirmed through the air inlet holes. In addition, the air inflow hole may be formed to be upwardly inclined toward the combustion chamber 112 so that the air flowing upward through the air inflow hole is introduced into the combustion chamber to lower the temperature of the exhaust gas and prevent the heat inside the combustion chamber from escaping to the outside .

Next, the burner 113 is installed inside the combustion chamber 112, and burns the gas or the fuel oil supplied from the supply line unit 130.

The detection sensor may include a first temperature sensor 114 attached to the combustion unit 110 to detect a combustion temperature formed during combustion, a first pressure sensor 115 for sensing a pressure in the combustion chamber 112, A flame detection sensor 117 for detecting a flame of the burner 113 generated during combustion and a second temperature sensor 116 for detecting the exhaust temperature discharged to the atmosphere after combustion. The data measured by these sensors can determine the normal operation or malfunction of the combustion furnace 111 and the operation of the burner 113, the operation of the air supply unit 120, and the adjustment of the supply amount of the supply line unit 130 It becomes basic data to be controlled.

Here, the first temperature sensor 114 measures the temperature of the gas burned by the burner 113. The measured temperature may be switched on or off depending on whether or not the temperature is lower than or equal to a predetermined temperature or the supply of fuel oil supplied from the combustible gas supplied from the first supply line 131 or the second supply line 133 And data for controlling the amount of air or water supplied to control the interruption or supply amount, to control the supply amount of air for combustion supplied from the air supply unit 120, or to reduce the heat conduction from the combustion chamber 112.

In addition, the first pressure sensor 115 measures the pressure in the combustion chamber 112 during combustion. When the measured pressure exceeds a predetermined pressure, the supply start, stop, or supply amount of the combustible gas is controlled, the burner 113 is turned on / off, the supply start and stoppage or supply amount of the fuel oil is controlled, 120 as the data for controlling the supply amount of air for combustion.

The flame detection sensor 117 senses a flame generated by the burner 113 at the time of combustion and controls the start and stop of supply or supply of the combustible gas depending on whether or not the flame is generated, / OFF, the start of the supply of fuel oil or the completion of supply of the combustible gas, or the control of the supply amount of air for combustion.

The second temperature sensor 116 measures the temperature at a position where the burned gas is discharged. At this time, the measured temperature is the ON / OFF state of the burner 113 according to a predetermined temperature or more, Or as data for controlling the supply amount of air or water to adjust the supply amount of the combustible gas or to reduce the heat conduction from the combustion chamber 112.

The air supply unit 120 supplies air necessary for combusting the combustible gas to the combustion chamber 112. The air supply unit 120 includes a fan 121.

The fan 121 is a device for forcibly generating the flow of air in order to supply outside air to the inside of the combustion chamber 112. At least one is installed on the lower side of the combustion chamber 112. For example, do. The fan 121 may operate all of the fans 121 at the same time and may operate only the remaining fans 121 while waiting for one or two fans 121 to be extra. At this time, the standby fan 121 is sequentially operated alternately with the operating fan 121, so that the usage time of all the fans 121 is appropriately distributed, so that the life of the fans 121 is similar. If it is determined in the emergency mode by the data of the detection sensor of the combustion unit 110 or the first supply line 131, some waiting pans 121 are further operated together with the operating fan 121, .

3 to 5B, the wind box 122 includes a hollow body 123 mounted on a lower portion of the combustion chamber 112 and having at least one side of the combustion chamber 112 opened, a body 123 A guide plate 125 provided so as to divide the inside of the body 123 into at least two zones, and a gas mixing member 126. The gas mixing member 126 is formed of a gas-

Here, the body 123 has a substantially planar, circular hollow shape, a side of which is open on the side of the combustion chamber 112, and an opposite side of the body 123 can be opened. As another example of the body 123, as shown in FIGS. 6A and 6B, the body 123 has a rectangular outer shape on the planar surface and a circular inner shape. In this case, the inner hollow may be made of a square. Of course, the outer shape of the body 123 or the hollow interior of the body 123 may be a polygon including triangular, pentagonal, hexagonal, and hexagonal. At this time, when the body 123 is circular, one plate is bent and joined at one place. Generally, when the body 123 is rectangular, two or four plates are bonded to each other at two or four places. In case of a round shape, an inlet pipe 124 is provided at regular intervals on the side surface of the body 123, and is provided on a flat surface when it is rectangular. Herein, a curved guide member may be mounted or formed on the inner surface of the body 123 so that the air flows vertically upward according to the inflow angle of the air introduced through the inflow pipe 124.

In addition, the inflow pipe 124 is provided to extend outwardly from the side surface of the body 123, allowing the outside and inside of the body 123 to communicate with each other, And is installed in connection with the fan 121 so as to be introduced into the inside. At this time, the fan 121 may be installed directly on the tip of the inflow pipe 124, or may be provided between the fan 121 and the inflow pipe 124. The inlet pipe 124 may be upwardly, horizontally, or downwardly inclined from the side of the body 123, and this may be achieved by disposing the fan 121 on the side of the body 123, So as to ultimately reduce the space occupied by the height of the combustion apparatus 100. [

The guide plate 125 is a member that divides the inside of the body 123 into a plurality of spaces and guides the flow of the air introduced from the side upward. The guide plate 125 prevents collision between the air introduced from two or more sides of the body 123 and prevents unnecessary vortices due to the collision.

The inlet pipe 124 is formed in the body 123 so that the air can be divided and introduced into at least two spaces defined by the guide plate 125. The inlet pipe 124 is formed in the body 123, So that external air can be uniformly introduced into the entire interior of the body 123.

For example, as shown in FIGS. 5A and 5B, when the inside of the body 123 is divided into four by the guide plate 125, the guide plate 125 is arranged in a substantially cross shape, and four inlet pipes 124, Are formed over two spaces partitioned by the guide plates 125, respectively. In this case, even if one of the fans 121 installed in the four inlet pipes 124 is in the standby mode and the three fans 121 are operated, air flows into the entire interior of the body 123 do. Although the inclined angle of the inflow pipe 124 is upward to the body 123 side, the air introduced into the body 123 is prevented from colliding with each other by the guide plate 125, Facing upward. At this time, a guide plate 125a is installed to allow a part of the outside air to flow vertically upward. The guide plate 125a is protruded from one side or both sides of the guide plate 125, A space is formed which can guide the flow of air vertically upward. The guide plate 125a forms a space in which the upper and lower surfaces and the one side surface are opened as shown in the drawing, but the upper and lower surfaces are opened and the other side surfaces can be deformed to form a space of a closed shape. Of course, the guide plate 125a may not be provided.

7A, when the inside of the body 123 is divided into three by the guide plate 125 formed with the guide plate 125a, the three inlet pipes 124 arranged at a certain angle are respectively inserted into the guide plates 125). In this case, one fan 121 is also in the standby mode, and air flows into the entire interior of the body 123 even if the two fans 121 are operated.

7B, the interior of the body 123 is partitioned into four by a guide plate 125 having a cross shape and formed with a guide plate 125a, and two inlet pipes 124 are formed in two spaces . In this case, the two fans 121 are operated together, and if necessary, only one fan 121 is operated so that air can be introduced into only a part of the inside of the body 123. Of course, the inflow pipe 124 may supply air to only one space.

3 and 8, the gas mixing member 126 is installed between the body 123 and the combustion chamber 112 to interfere with the flow of air discharged from the body 123, Which is a member for promoting the mixing of the combustible gas and the air. The gas mixing member 126 is composed of a plurality of mixing blades 128 that are arranged radially on the rim 127 and the rim 127 and are inclined toward the combustion chamber 112 side. The gas mixing member 126 may be mounted on the inlet pipe 124 to interfere with the flow of air flowing into the body 123 or may be installed in the internal space of the body 123, To the combustion chamber 112 side of the body 123 to interfere with the flow of the air discharged from the combustion chamber 112. The structure and installation position of the gas mixing member 126 is very suitable for promoting the mixing of the air and the combustible gas.

The air supply unit 120 further includes a damper (not shown). The damper is a member for controlling the amount of air introduced into the body 123 or discharged from the body 123, and is installed to be able to open and close by the space partitioned by the guide plate 125. To this end, the damper is mounted on the upper surface of the inflow pipe 124 or the combustion chamber 112 side of the body 123, and includes at least one blocking member that is axially rotated or slidably moved so as to block the flow of air. The damper is installed to open or close a part of the space of the body 123 by a divided space or a part or whole regardless of the divided space while the blocking member rotates or moves according to a control signal. These dampers are designed to operate automatically or manually depending on the inflow of air and are controlled by the data of the sensors.

3, the supply line unit 130 includes a first supply line 131 for supplying the combustible gas to the burner 113, a second supply line 131 for discharging the combustible gas into the atmosphere from the first supply line 131, A third supply line 134 for supplying an inert gas to the first supply line 131 and a second supply line 134 for supplying the fuel oil such that the burner 113 continuously radiates the flame, (133).

First, the first supply line 131 includes a flow rate sensor 131a for measuring the flow rate of the combustible gas supplied from the storage tank 200, a third temperature sensor 131b for sensing the temperature, A first valve 131d for controlling the inflow of the combustible gas flowing into the first supply line 131, a second valve 131e for interrupting the flow of the combustible gas, And a third valve 131f for controlling the flow rate of the combustible gas flowing into the combustion chamber 112. [ Here, the flow rate sensor 131a, the third temperature sensor 131b, and the second pressure sensor 131c are installed in advance of the first valve 131d, and the first valve 131d, the second valve 131e and the third valve 131f are sequentially installed. The first valve 131d, the second valve 131e and the third valve 131f are connected to the first supply line 131 and the flow rate sensor 131a, respectively. The flammable gas discharged from the storage tank 200 flows into the first supply line 131, Temperature, and pressure are normally measured by the third temperature sensor 131b and the second pressure sensor 131c, it is opened so as to continue to flow into the combustion chamber 112 and is controlled to be shut off. Here, the second valve 131e is a safety valve for controlling the flow of the combustible gas again, and may be excluded as the case may be. The third valve 131f is opened and closed to regulate the supply start, the stop, and the supply amount of the combustible gas supplied to the combustion chamber 112. The operation of the first valve 131d, the second valve 131e and the third valve 131f is controlled by a plurality of detection sensors mounted in the combustion chamber 112.

Next, the discharge line 132 is provided between the first valve 131d and the third valve 131f to discharge the combustible gas remaining between the first valve 131d and the third valve 131f to the atmosphere Line. The discharge line 132 is provided with a discharge valve 132a for controlling the flow of the combustible gas. The discharge valve 132a is opened when the combustible gas flowing into the combustion chamber 112 is shut off and thereafter the combustible gas between the first valve 131d and the third valve 131f is to be discharged into the atmosphere, .

Next, the third supply line 134 is a line for supplying the inert gas to the first supply line 131, and is connected between the first valve 131d and the third valve 131f, and more specifically, And is connected between the second valve 131e and the third valve 131f. The third supply line 134 is provided with a supply valve 134a which is connected to the first supply line 131 so that the flow of the combustible gas flowing from the first supply line 131 to the combustion chamber 112 is blocked, When the third valve 131d and the third valve 131f are closed, the combustible gas between the first valve 131d and the third valve 131f is opened to release the air to the atmosphere, and is controlled to be shut off.

Next, the second supply line 133 is installed to supply the external fuel oil to the burner 113 so that the burner 113 can continuously radiate the flame. The second supply line 133 supplies fuel oil to the burner 113 so that the burner 113 can radiate the flame if the concentration of the ignition material in the combustible gas is low and it is difficult for the burner 113 to burn itself. The resulting flame completely burns the combustible gas even if the concentration of ignitable material is low. A separate valve is provided in the second supply line 133. The valve is opened and closed by a flow sensor 131a for measuring the flow rate and pressure of the combustible gas, Is controlled by the data value of the detection sensor 131c or the flame detection sensor 117 or is operated by the user's operation mode selection. That is, if the flow rate and the pressure are reduced to such an extent that the combustible gas can not be self-combusted, or if the flammable gas is supplied but the flame is not generated, fuel oil is supplied to forcibly generate the flame in the burner 113, The flame continuously burns the combustible gas.

Thereafter, the flow rate and the pressure are markedly reduced to such an extent that the combustible gas can not be combusted in the flow rate sensor 131a and the second pressure sensor 131c, or the operation of the burner 113 by the fuel oil is continued for a predetermined time It is determined that all of the combustible gas is combusted and the fuel oil supply to the second supply line 133 is also controlled to be blocked while blocking the flow of the combustible gas flowing into the combustion chamber 112. In addition, if it is determined that the combustible gas is all combusted, the combustible gas in the first supply line 131 is discharged into the atmosphere. To this end, the discharge valve 132a is opened, the first and third valves 131d and 131f are closed, the supply valve 134a and the second valve 131e are opened, and the inert gas . Further, when all of the combustible gas in the first supply line 131 is discharged after the inert gas is supplied for a predetermined time, it is controlled to close all the valves.

<Control method>

9 is a flowchart showing a method for controlling the combustion system shown in Fig.

First, the combustible gas is supplied from the storage tank 200 to the first supply line 131 (S10). At this time, the combustible gas vaporized in the storage tank 200 is supplied to the first supply line 131 through the compression line 220 or the uncompressed line 210.

Next, the combustible gas that has passed through the first supply line 131 is combusted in the combustion chamber 112 (S100). The fan 121 is operated to burn the combustible gas in the combustion chamber 112 and the first valve 131d, the second valve 131e and the third valve 131f are closed while the discharge valve 132a is closed (Not shown), which is opened and flows, is mixed with the air supplied from the air supply unit 120, and at the same time, an electric spark is generated at all times. The burner 113 of the combustion chamber 112, do. At this time, the third valve 131f is slowly opened while controlling the flow rate of the combustible gas.

Next, while the measurement data of the sensors provided in the first supply line 131 and the combustion unit 110 are within the normal range, the combustible gas is continuously burned and discharged (S110). This measurement data is stored in the first supply line 131 and the second pressure sensor 131c of the first supply line 131 and the first temperature sensor 114 and the first pressure sensor 115 of the combustion unit 110, ), The second temperature sensor 116 and the flame sensor 117, and the combustible gas is continuously burned and discharged in a normal state based on the data measured by these sensors.

Next, when the combustion of the combustible gas is completed, the first valve 131d and the third valve 131f are closed to complete the combustion (S120). More specifically, when the combustion of the combustible gas is completed, the first valve 131d is closed, the combustible gas remaining in the first supply line 131 is completely burned, the third valve 131f is closed, The air supply from the air supply unit 120 is stopped while the operation of the air supply unit 113 is stopped.

Finally, the combustible gas remaining in the first supply line 131 is released to the atmosphere (S130). The supply valve 134a of the third supply line 134 is opened while the first valve 131d and the third valve 131f are closed and the inert gas is supplied to the first valve 131d and the third valve 131d, Is supplied to the first supply line 131 between the discharge line 131f and the discharge valve 132a is opened and the combustible gas is discharged to the atmosphere through the discharge line 132. [

On the other hand, when the measured data value of the sensors is less than or more than a certain range during the combustion of the combustible gas, it switches to the emergency mode. Hereinafter, a method of controlling the combustion system in the emergency mode will be described.

10 is a flowchart showing a control method when the control method of FIG. 9 is in the emergency mode.

First, in the emergency mode, it is determined whether a combustible gas is supplied to the combustion chamber or not (S111). More specifically, the flow rate sensor 131a and the second pressure sensor 131c of the first supply line 131, the first temperature sensor 114, the first pressure sensor 115 of the combustion unit 110, The second temperature sensor 116 and the flame detection sensor 117 are switched from the normal range to the emergency mode, it is determined whether the combustible gas can be supplied to the combustion chamber 112 Is judged to be impossible.

Next, when it is possible to supply the combustible gas, the supply amount of the combustible gas is adjusted (S112). Specifically, when the temperature measured by the first temperature sensor 114 or the second temperature sensor 116 exceeds a certain range or the pressure measured by the first pressure sensor 115 falls below or exceeds a certain range If the combustible gas can be supplied to the combustion chamber 112, the third valve 131f adjusts the supply amount of the combustible gas to determine whether the data value has returned to normal (S113). The data value returns to normal and returns to the continuous continuous step (S120).

Finally, when the supply of the combustible gas is impossible, the discharging step (S130) is performed. In detail, when the combustible gas can not be supplied to the combustion chamber 112 due to malfunction of the fan 121 or flame detection by the flame detection sensor 117, or when a combustible gas can be supplied to the combustion chamber 112 When the data value does not return to normal through the control of the flow rate of a combustible gas, the above-described discharge step (S130) is performed.

As described above, in the configuration and control method of the present invention described above, the flow of the combustible gas in the first supply line 131, the combustion chamber 112, the second supply line 133, and the third supply line 134, Opening and closing of various valves due to supply and interruption of fuel oil, supply and stop of inert gas, switching of the emergency mode during combustion, and the like are controlled by measurement data of at least one sensor among various sensors. In addition, the various sensors described above can be installed or excluded as needed, and at least one of these sensors is selected and installed.

As described above, those skilled in the art will appreciate that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

100: Combustion apparatus 110: Combustion unit
111: combustion furnace 112: combustion chamber
113: burner 114: first temperature sensor
115: first pressure sensing sensor 116: second temperature sensing sensor
117: Flame detection sensor 120: Air supply unit
121: fan 122: wind box
123: body 124: inlet pipe
125: guide plate 125a: guide plate
126: gas mixing member 127: rim
128: mixing blade 130: supply line portion
131: first supply line 131a: flow rate sensor
131b: third temperature sensor 131c: second pressure sensor
131d: first valve 131e: second valve
131f: third valve 132: discharge line
132a: discharge valve 133: second supply line
134: third supply line 134a: supply valve
200: Storage tank 210: Uncompressed line
211: regulating valve 220: compression line
221: compressor 222: heater
230: engine 240: boiler
250: generator.

Claims (13)

A combustion apparatus comprising a combustion chamber (112) having a burner (113) for burning a combustible gas,
A first supply line 131 arranged to supply a combustible gas to the combustion chamber 112, a discharge line 131 connected to the first supply line 131 to discharge the combustible gas in the first supply line 131 to the atmosphere in an emergency, And a third supply line (134) connected to the first supply line (131) to supply an inert gas to the first supply line (131)
The first supply line 131 includes a flow rate sensor 131a for measuring the flow rate of the combustible gas flowing into the first supply line 131, a third temperature sensor 131b for measuring the temperature of the combustible gas, A first pressure sensor 131c for sensing the pressure of the combustible gas, a first valve 131d for controlling the flow of the combustible gas passing through the detection sensors, a second valve 131d for detecting the pressure of the combustible gas passing through the first valve 131d, And a third valve 131f for controlling the flow rate of the combustible gas supplied to the combustion chamber 122 through the second valve 131e. Of the total volume of the combustible gas.
The method according to claim 1,
Further comprising a second supply line (133) arranged to supply fuel to said burner (113) for burning a combustible gas which is supplied to said combustion chamber (112) and which is not self-ignitable, characterized in that said vaporizing combustible gas Combustion system.
delete The method according to claim 1,
The discharge line 132 is connected between the first valve 131d and the third valve 131f to discharge the combustible gas present in the first supply line 131 to the atmosphere and the flow of the combustible gas Characterized in that a discharge valve (132a) is provided to control the combustion of the combustible gas.
The method according to claim 1,
The third supply line 134 is connected between the first valve 131d and the third valve 131f or between the second valve 131e and the third valve 131f to supply an inert gas to the first supply line 131. [ And a supply valve (134a) which is connected between the first and second combustion chambers (131a, 131b) and controls the supply of the inert gas.
The method according to claim 1,
A first temperature sensor 114 for measuring the combustion temperature of the combustible gas burned in the combustion chamber 112, a pressure sensor 114 for detecting a pressure in the combustion chamber 112, A flame detection sensor 117 for detecting a flame of a burner 113 generated during combustion and a second temperature sensor 116 for sensing an exhaust temperature discharged to the atmosphere after combustion And a combustion unit (110) that includes at least one of the combustion chamber (110) and the combustion chamber (110).
The method according to claim 1,
Wherein the first supply line (131) is connected to a compression line (220) or an uncompressed line (210) through which the combustible gas vaporized in the storage tank (200) flows.
8. A method for controlling a combustion system for a vaporized combustible gas according to any one of claims 1, 2 and 4 to 7,
While closing the discharge valve 132a connected to the first supply line 131 disposed to supply the combustible gas to the combustion unit 110 while operating the fan 121 located outside the combustion unit 110, The first valve 131d, the second valve 131e and the third valve 131f which are sequentially arranged in the line 131 are opened and the combustible gas is mixed with the air supplied from the fan 121, (S100), which is burned by the burner (113) of the burner (112);
The flow rate sensor 131a and the second pressure sensor 131c of the first supply line 131, the first temperature sensor 114 of the combustion unit 110, the first pressure sensor 115, A combustion sustaining step (S110) in which the combustible gas is continuously burned and discharged in a normal state based on the data measured by at least one of the temperature sensor (116) and the flame detection sensor (117);
When the burning of the combustible gas is completed, the first valve 131d is closed, the combustible gas remaining in the first supply line 131 is completely burned, the third valve 131f is closed, (S120) of stopping the inflow of air from the fan (121) while the operation of the fan (121) is stopped;
A third supply line 134 connected to the first supply line 131 for supplying an inert gas to the first supply line 131 in a state where the first valve 131d and the third valve 131f are closed The supply valve 134a is opened so that an inert gas is supplied to the first supply line 131 between the first valve 131d and the third valve 131f and the discharge valve 132a is opened to discharge the discharge line 132. [ (S130) to the atmosphere through the outlet of the combustion chamber.
9. The method of claim 8,
Wherein the first valve (131d) and the second valve (131e) are opened and the third valve (131f) is opened while controlling the flow rate of the combustible gas in the initial stage of the combustion Control method.
9. The method of claim 8,
The flow rate sensor 131a and the second pressure sensor 131c of the first supply line 131, the first temperature sensor 114, the first pressure sensor 115, 2 judges whether the combustible gas can be supplied to the combustion chamber 112 or not if the data value measured by at least one sensor of the temperature sensor 116 and the flame sensor 117 is shifted to the emergency mode after departing from the normal range (S111); and
When the temperature measured by the first temperature sensor 114 or the second temperature sensor 116 exceeds a certain range or the pressure measured by the first pressure sensor 115 falls below or exceeds a predetermined range Adjusting the supply amount of the combustible gas to the third valve (131f) so as to return the data value of the sensor to the normal range and return to the continuous continuous step (S120) when the combustible gas of the combustible gas can be supplied to the combustion chamber (S112). &Lt; / RTI &gt; A method of controlling a combustion system for a combustible combustible gas.
11. The method of claim 10,
Further comprising: determining whether the data value has returned to the normal range (S113), and returning to the continuous continuous operation (S120) if the data value is returned.
12. The method of claim 11,
Wherein the discharging step (S130) is performed when the fan (121) malfunctions or when no flame is detected in the flame detecting sensor (117).
9. The method of claim 8,
(S10) in which the combustible gas vaporized in the storage tank (200) is supplied to the first supply line (131) through the compression line (220) or the uncompressed line (210) A method for controlling a combustion system for a vaporized combustible gas.

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