KR20160000625A - Combustion device for vaporized flammable gas and combustion system thereof - Google Patents

Abstract

The present invention relates to a combustion device for vaporized flammable gas and a combustion system comprising the same. The combustion device comprises: a combustion unit to combust flammable gas; a gas supply unit to supply air to the combustion unit; and a supply line unit to supply the flammable gas to the combustion unit. The supply line unit comprises a wind box to supply air flowing from a side of the wind box to the combustion unit disposed above the wind box. The wind box comprises: a body having a middle hole wherein at least one surface of the middle hole on a side of a combustion furnace is opened to supply the air to the combustion furnace, and an outer shape of the body or a cross sectional shape of the middle hole is a polygonal shape including a circle and a rectangle; two or more inflow pipes arranged on a side surface of the body at regular intervals to allow the air to flow thereinto from the side; and a guide plate embedded in the body to divide the inside of the body into at least two spaces, prevent a collision of the air flowing through the inflow pipes, and guide a flow of the air upwards. The inflow pipes are installed to allow the air to flow into at least two spaces among the two to four spaces divided in the body by the guide plate.

Description

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

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

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 a tank 10 is supplied to a ship's engine 12 through a fuel line 11 so as to be used as a fuel. 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.

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.

SUMMARY OF THE INVENTION A first object of the present invention developed to solve the above problems is to provide a combustion apparatus for a combustible combustible gas which is adapted to supply an inert gas to a supply line in an emergency mode to release residual combustible gas into the atmosphere, System.

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 apparatus for a combustible combustible gas which is continuously burned and a combustion system having the same.

In order to achieve the above object, a vaporized combustible gas combustion apparatus according to the present invention comprises a combustion section for burning a combustible gas, an air supply section for supplying air to the combustion section, and a supply line section for supplying a combustible gas to the combustion section Wherein the supply line portion includes a wind box configured to supply the air introduced from the side to the upper combustion portion.

In order to supply air to the combustion furnace, a windbox is provided with at least a hollow opening on one side of the combustion furnace, a polygonal body having an external or hollow cross-sectional shape including a circular or quadrangle, And at least two inlet pipes provided at regular intervals.

In addition, the wind box is provided with a guide plate built in the body so as to divide the inside of the body into at least two spaces and to induce the flow of air upward while preventing collision between the air flowing into the plurality of inlet pipes .

Further, an inflow pipe is provided so as to allow air to flow into at least two spaces among the internal spaces of the body partitioned into two to four by the guide plate.

Here, the guide plate is provided to have a space in which air is partially introduced into one or both surfaces of the guide plate so that a part of the air can vertically flow upward along the guide plate.

The air supply unit may further include a fan installed to supply air to the inflow pipe, a gas mixing member installed between the wind box and the combustion furnace to promote mixing of the combustible gas with air supplied to the combustion furnace .

The gas mixing member may include a rim and a plurality of mixing blades mounted radially from the rim and inclined toward the combustion chamber.

And, the fans are controlled so that the selected fans are operated to alternately wait and operate and supply air to the entire divided space of the body, and the remaining fans wait.

The supply line unit may include a first supply line provided to supply a combustible gas to the burner and a second supply line provided to supply fuel oil to the burner when the frequency of flame generation by the combustible gas becomes less than a predetermined number of times do.

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, a flow rate of the combustible gas passing through the second valve and supplied to the combustion chamber At least one of the first and second valves is provided.

And a discharge line provided with a discharge valve for discharging the combustible gas between the first valve and the third valve to the atmosphere.

The supply line portion may further include a third supply line connected between the first valve and the third valve or between the second valve and the third valve to supply the inert gas to the first supply line, And a supply valve for controlling the supply of the inert gas is provided.

The combustion section includes 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 combustion unit further includes a flue pipe arranged to surround the combustion chamber, and air blown from the air supply unit flows into the space between the combustion chamber and the flue pipe.

An air inlet hole is formed in a side surface of the combustion chamber so that air flowing upward between the combustion chamber and the flue tube flows into the combustion chamber and the combustion chamber is punched upward to the combustion chamber so as to prevent lateral release of heat from the combustion chamber. do.

On the other hand, a combustion system equipped with a combustible combustible gas combustion apparatus according to the present invention includes a combustion device; A storage tank in which a combustible gas in a liquefied state is stored; A compression line or an uncompressed line provided so that the combustible gas vaporized in the storage tank flows to the combustion device; An output device including at least one of an engine, a boiler and a generator to which a part of the combustible gas flowing in the compression line is supplied, wherein the compression line is provided with a compressor or a heater for processing the combustible gas flowing to the output device, The compression line and the uncompressed line are each provided with a control valve for controlling the flow of the combustible gas.

The combustion apparatus or the combustion system according to the present invention is characterized in that it is used for a marine such as an LNG ship or an LNG drilling facility or an underground facility for land use.

As described above, according to the present invention, the air supplied to the combustion chamber flows from the side of the windbox and flows upward, thereby reducing the height of the combustion apparatus and reducing the space occupancy.

In addition, it is possible to prevent unnecessary vortices due to collision while preventing collision between air introduced from a plurality of lateral sides by a guide plate built in a wind box.

In addition, in the state where the inside of the body is divided into a plurality of spaces by the guide plate, air is supplied through at least two spaces through the inflow pipe, and a part of the plurality of fans mounted on the inflow pipe is operated, The air is supplied to the space while the rest of the air is supplied to the space so that the air is uniformly supplied to the combustion chamber through the entire body while operating only a part of the fan.

Further, mixing of the combustible gas with the air flowing by the gas mixing member installed between the combustion chamber and the wind box is promoted.

In addition, there is an effect that the amount of air flowing into the combustion chamber can be controlled by the damper mounted on the wind box.

Further, when the concentration of the ignitable material in the combustible gas is low and the self-combustion is impossible, fuel oil is supplied through the second supply line to operate the burner, whereby the combustible gas can be forcibly burned.

The amount of air supplied to the combustion chamber by the measured data of various sensors mounted on the first supply line and the combustion unit is controlled by the control of the fan and the damper.

In addition, when the malfunction is detected in the combustion by the measured data of the various sensors mounted on the first supply line and the combustion unit, the amount of the combustible gas supplied to the combustion chamber can be quickly adjusted or the inert gas of the third supply line So that the combustible gas in the first supply line can be quickly discharged to the atmosphere.

 When all of the liquefied gas in the storage tank is unloaded and the inert gas is supplied to the storage tank to completely burn the remaining combustible gas, the first supply line is closed and then the inert gas is supplied to the first supply line, All of the combustible gases in the line can be released into the atmosphere.

The burning device or the combustion system according to the present invention can be used in various places such as a ship installed on an LNG ship or an onshore used for installation on a LNG drilling facility or the like.

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 view showing a combustion apparatus for a vaporized combustible gas according to the present invention.
3A and 3B are a plan view and a perspective view of the wind box shown in Fig.
Figs. 4A and 4B show a first modification of the wind box shown in Fig. 3A.
5A and 5B show a second modification of the wind box shown in FIG. 3A.
6 is an enlarged perspective view of the gas mixing member shown in Fig.
FIG. 7 is a schematic diagram illustrating a third supply line for supplying an inert gas to the first supply line of FIG. 2; FIG.
Fig. 8 is a schematic view showing a combustion system having the combustion device shown in Fig. 2; Fig.
9 is a flowchart showing a control method of the combustion apparatus shown in Fig.
10 is a flowchart showing a control method of the combustion system shown in Fig.
11 is a flowchart showing a post-process after the unloading of the combustible gas in the combustion system shown in Fig.

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.

<Combustion Apparatus>

2 is a plan view and a perspective view showing a windbox shown in Fig. 2, Figs. 4A and 4B are diagrams showing a state in which the windbox shown in Fig. 3a is a first modified example of the windbox shown in Fig. 3a, Figs. 5a and 5b are second modified examples of the windbox shown in Fig. 3a, Fig. 6 is an enlarged perspective view of the gas mixing member shown in Fig. 7 is a diagram showing the structure including a third supply line for supplying an inert gas to the first supply line of Fig.

2, the combustion apparatus 100 according to the present invention includes a combustion unit 110, an air supply unit 120 for supplying air to the combustion unit 110, a gas or fuel And a supply line unit 130 for supplying 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 inlet hole may be inclined upward toward the combustion chamber 112 so that the air flowing upward through the air inlet hole may flow into the combustion chamber and the heat inside the combustion chamber may not escape 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 and a wind box 122.

First, 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 device is installed in the wind box 122, for example, two to four 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, . The fan 121 is mounted on the inlet pipe 124 of the wind box 122. Alternatively, a separate pipe may be provided between the fan 121 and the inflow pipe 124.

2 to 3B, the wind box 122 includes a hollow body 123, which is mounted on a lower portion of the combustion chamber 112 and at least one side of the combustion chamber 112 is open, 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. 4A and 4B, the body 123 has a rectangular outer shape on a plane and a circular hollow shape inside. 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. Further, the guide plate 125 prevents collision between the air introduced from two or more sides of the body 123, and blocks 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. 3A and 3B, 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.

5A, 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.

5B, the interior of the body 123 is partitioned into four by a cross-shaped guide plate 125 formed with a guide plate 125a, and two inlet pipes 124 are provided 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.

2 and 6, 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.

Next, the supply line unit 130 includes a first supply line 131 for supplying the combustible gas to the burner 113, a discharge line 132 for discharging the combustible gas to 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 133 for supplying the fuel oil such that the burner 113 continuously radiates the flame .

7, 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 (see Fig. 8), a third sensor A first valve 131d for controlling the inflow of the combustible gas flowing into the first supply line 131, a second valve 131d for controlling the flow of the combustible gas to the middle And a third valve 131f for controlling the flow rate of the combustible gas flowing into the combustion chamber 112. The second valve 131e closes 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 burned by itself, and the flammable gas is supplied but the flame is not generated, the fuel oil is supplied to forcibly generate the flame in the burner 113, Which continuously combusts 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 shut off, 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.

<Combustion System>

Fig. 8 is a schematic view showing a combustion system having the combustion device shown in Fig. 2; Fig.

As shown in FIG. 8, a combustion system having a combustible combustible gas combustion apparatus according to the present invention includes a combustion apparatus 100, a storage tank 200 in which a combustible gas is stored, a storage tank 200, 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 installed in the compression line 220, And a heater (222). The uncompressed line 210 and the compressed line 220 are connected to the first supply line 131 and connected to the combustion apparatus 100 before the flow rate sensor 131a in FIG. Herein, the combustion apparatus 100 from the first supply line 131 connected to the uncompensated line 210 and the compression line 220 is described in detail with reference to FIGS. 1 and 7, .

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.

<Control method>

9 is a flowchart showing a control method of the combustion apparatus shown in Fig.

Hereinafter, a method of controlling the combustion apparatus in the normal mode in which the combustible gas is supplied to the combustion chamber in the storage tank and burned will be described with reference to FIGS. 7, 8, and 9. FIG.

In the control method for the combustible gas of the combustible gas according to the present invention, first, the fan 121 is driven (S100). Some of the fans 121 are put on standby, and the rest are started. The number of operations of the fan 121 is determined according to the amount of combustion to be burned in the combustion chamber 112 and the data of a number of sensors installed in the combustion chamber 112, The fan 121 is controlled so as to be alternately operated or waiting sequentially. The air introduced from the side of the body 123 of the wind box 122 by the operation of the fan 121 is raised by the guide plate 125 and is supplied to the combustion chamber 112 through the gas mixing member 126 . In addition, the damper is also opened so that air is sufficiently supplied to the combustion chamber 112.

Next, the discharge valve 132a is opened and the first and third valves 131d and 131f are closed (S110). The combustible gas remaining in the first valve 131d and the third valve 131f of the first supply line 131 is completely discharged to the atmosphere. At this time, by opening the supply valve 134a to supply the non-combustible gas to the first supply line 131, the combustible gas may be discharged to the atmosphere.

Next, the discharge valve 132a is closed, and the first valve 131d, the second valve 131e and the third valve 131f are opened (S120). At this time, the data measured by the flow rate sensor 131a, the third temperature sensor 131b and the second pressure sensor 131c are determined to be normal, The opening speed and opening degree of the third valve 131f are adjusted so that the supply amount of the supplied combustible gas, the temperature and the pressure are within a certain range. Here, the measured data of the third temperature sensor 131b may be excluded from the data for controlling the third valve 131f. Also, during the combustion of the combustible gas, the amount of combustion in the combustion chamber 112 can be maintained within a certain range based on the flow rate and pressure of the combustible gas by the flow rate sensor 131a and the second pressure sensor 131c At least one of the first valve 131d, the second valve 131e and the third valve 131f is operated to adjust the flow rate of the combustible gas flowing into the combustion chamber 112. Further, the fan 121 and the damper are controlled according to the flow amount of the combustible gas. For example, when the measured values of the flow rate sensor 131a and the second pressure sensor 131c rise (or fall) and temporarily enter the emergency mode, the third valve 131f is controlled to lower the flow rate and the pressure (Or rises) and returns to the normal mode. At this time, the movable number of the fan 121 and the opening degree of the damper are adjusted according to the amount of the combustible gas flowing into the combustion chamber 112 due to the operation of the third valve 131f.

Finally, the burner 113 is operated in the combustion chamber 112, and the combustible gas is combusted and discharged to the atmosphere (S130). At this time, if the measured data from the first temperature sensor 114, the first pressure sensor 115, the second temperature sensor 116, and the flame sensor 117 are measured normally, do.

Hereinafter, a control method according to each case in which it is impossible to supply the combustible gas in the emergency mode when the combustible gas is combusted will be described.

For example, when a malfunction of the fan 121 and a malfunction of the flame detection sensor 117 are detected, the first valve 131d and the third valve 131f of the first supply line 131 are shut off, The discharge valve 132a of the discharge line 132 and the supply valve 134a of the third supply line 134 are opened to supply an inert gas to the first supply line 131, The combustible gas in the supply line 131 is immediately discharged to the atmosphere.

As another example, when the measured values of the first temperature sensor 114, the first pressure sensor 115, and the second temperature sensor 116 exceed the set value, the third valve 131f is first controlled Thereby reducing the supply of combustible gas. Thereafter, if the predetermined value is exceeded even after a predetermined time has elapsed, the second valve 131e is opened while the first valve 131d is closed, and the discharge valve 132a and the supply valve 134a are opened An inert gas is supplied to the first supply line 131 to immediately discharge the combustible gas in the first supply line 131 into the atmosphere.

Hereinafter, with reference to FIG. 10, a description will be given of a combustion system control method having a combustible gas combusting apparatus configured to flow a combustible gas into a combustion apparatus for use as a fuel or using a combustible gas vaporized in a storage tank do.

10 is a flowchart showing a control method of the combustion system shown in Fig.

First, the vaporized combustible gas is supplied from the storage tank 200 (S200). The gas stored in the storage tank 200 is, for example, a liquefied gas having a temperature of less than -165 DEG C or less than 0.25 bar, and this gas is supplied to the combustible gas when it is vaporized by external heat to be converted into a combustible gas. At this time, a separate pump for supplying the combustible gas may be operated.

Next, it is determined whether the combustible gas is to be used as fuel or combusted (S210).

Next, when the combustible gas is used as the fuel, the compression line 220 is opened (S220). In this case, a combustible gas is supplied to the engine 230, the boiler 240, or the generator 250 through the compressor 221 and the heater 222 along the compression line 220 opened by the operation of the control valve 211 And is supplied as fuel of the output device. At this time, the combustible gas to be supplied is processed by the compressor 221 and the heater 222 so as to be about 0 to 100 ° C or about 6 to 10 bar. In addition, the remaining combustible gas used as fuel is controlled by a separate valve so as to be supplied to the combustion apparatus 100.

Next, when the combustible gas is burned, the uncompressed line 210 is opened (S230). In this case, the combustible gas is supplied to the combustion apparatus 100 at atmospheric pressure. The combustible gas supplied to the combustion apparatus 100 is burnt through the above-described steps.

Finally, some or all of the combustible gas is supplied to the combustion apparatus 100 (S240) in the compression line 220 opening step S220 and the uncompressed line 210 opening step S230. Thereafter, the combustor 100 combusts the combustible gas.

Hereinafter, with reference to FIG. 11, a control method of completely discharging the combustible gas remaining after the liquefied combustible gas is unloaded from the storage tank will be described. The control method of burning the remaining combustible gas is similar to the control method of burning the vaporized combustible gas, so only differences will be described in detail.

11 is a flowchart showing a post-process after the unloading of the combustible gas in the combustion system shown in Fig.

First, the fan 121 is driven (S300).

Next, the discharge valve 132a is opened and the first and third valves 131d and 131f are closed (S310). At this time, the combustible gas remaining in the first valve 131d and the third valve 131f is completely discharged into the atmosphere.

Next, the discharge valve 132a is closed, and the first, second and third valves 131d, 131e and 131f are opened (S320).

Next, in order to discharge the combustible gas remaining in the storage tank 200, an inert gas is supplied to the storage tank 200 (S330).

Next, the combustible gas is supplied to the first supply line 131 through the compression line 220 or the uncompressed line 210 (S340).

Next, the burner 113 is operated in the combustion chamber 112, and the combustible gas is burned and discharged to the atmosphere (S350). At this time, an ignition plug, which is provided in the burner 113 to generate an electrical spark at all times, is operated to burn the combustible gas.

Next, fuel oil is supplied to the burner 113 based on the measured data from the second pressure sensor 131c, the flow rate sensor 131a or the flame sensor 117 (S360). The pressure and the flow rate of the combustible gas are measured by the second pressure sensor 131c and the flow rate sensor 131a and the number of times that the self-combustion of the combustible gas is impossible or the number of times that the flame is not detected by the flame sensor 117 The concentration of the ignitable material in the combustible gas is lowered to determine that self-combustion is impossible, and the fuel oil is supplied through the second supply line 133 so that the burner 113 can emit the flame. Thus, while the flame is being radiated by fuel oil, the supply of flammable gas continues to burn.

Next, when the combustion of the combustible gas is completed, the operation of the burner 113 is stopped while the supply of the combustible gas is stopped (S370). At this time, when the pressure and flow rate of the combustible gas measured by the second pressure sensor 131c and the flow rate sensor 131a are remarkably reduced to such an extent that the combustion can not be performed or when the operation of the burner 113 by the fuel oil has elapsed for a predetermined time, It is judged that all of them are burnt, and the second supply line 133 is shut off while blocking the third valve 131f. Further, the operation of the burner 113 is stopped while the supply of the fuel oil is blocked.

Next, the combustible gas in the first supply line 131 is discharged into the atmosphere (S380). To this end, the discharge valve 132a is opened, the first and third valves 131d and 131f are shut off, the supply valve 134a and the second valve 131e are opened, and the first supply line 131 is inactivated The gas is supplied. The inert gas is supplied into the first valve 131d and the third valve 131f precisely and the inert gas in the first valve 131d and the third valve 131f is discharged into the atmosphere.

Finally, after the inert gas is supplied for a predetermined period of time, it is determined that all the combustible gases in the first supply line 131 have been discharged, and all the valves are closed (S390).

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 (16)

A combustion unit 110 for combusting a combustible gas, an air supply unit 120 for supplying air to the combustion unit 110, and a supply line unit 130 for supplying a combustible gas to the combustion unit 110 In the apparatus,
Wherein the supply line unit (130) includes a wind box (122) configured to supply the air introduced from the side to the upper combustion unit (110).
The method according to claim 1,
In order to supply air to the combustion furnace 111, the wind box 122 is formed with at least a hollow opening on one side of the combustion furnace 111, and a cross-sectional shape of the outer or hollow is a polygonal body including a circular or square shape. (123), and at least two inlet pipes (124) provided at regular intervals on the side of the body (123) so that the air flows in from the side.
3. The method of claim 2,
The wind box 122 divides the inside of the body 123 into at least two spaces and prevents the air from flowing into the plurality of inlet pipes 124 while inducing the flow of air upward And a guide plate (125) built in the body (123) to guide the combustion gas into the combustion chamber.
The method of claim 3,
Characterized in that the inflow pipe (124) is provided to introduce air into at least two spaces among the internal spaces of the body (123) divided into 2 to 4 by the guide plate (125) Device.
The method of claim 3,
Wherein a guide plate (125a) is provided to have a space in which air is partially introduced into one or both surfaces of the guide plate (125) so that a part of the air can vertically flow upward along the guide plate (125) Combustion apparatus for combustible gas.
The method according to claim 1,
The air supply unit 120 includes a fan 121 installed to supply air to the inflow pipe 124 and a fan 121 installed in the wind box 122 to facilitate mixing of the air supplied to the combustion path 111 and the combustible gas. Further comprising a gas mixing member (126) installed between the wind box (122) and the combustion furnace (111) in the combustion chamber.
The method according to claim 6,
Characterized in that the gas mixing member (126) comprises a rim (127) and a plurality of mixing vanes (128) mounted radially from the rim (127) and inclined towards the combustion chamber (122) Combustion device.
The method according to claim 6,
The fans 121 are alternately operated in the atmosphere and operated so that the selected fans 121 are operated to supply air to the entire divided space of the body 123 and the remaining fans 121 are controlled to wait Characterized in that the combustion device of the combustible combustible gas.
The method according to claim 1,
The supply line unit 130 includes a first supply line 131 installed to supply a combustible gas to the burner 113 and a second supply line 131 connected to the burner 113, And a second supply line (133) installed to supply oil.
10. The method of claim 9,
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 sensing 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. A combustion device for vaporized combustible gases.
11. The method of claim 10,
Further comprising a discharge line (132) provided with a discharge valve (132a) for discharging the combustible gas between the first valve (131d) and the third valve (131f) to the atmosphere. Device.
10. The method of claim 9,
The supply line unit 130 is provided 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 third supply line (134) connected between the second supply line
Characterized in that the third supply line (134) is provided with a supply valve (134a) for controlling the supply of the inert gas.
The method according to claim 1,
The combustion unit 110 includes a burner 113, a combustion chamber 122 in which the burner 113 is installed, a first temperature sensor 114 for measuring the combustion temperature of the combustible gas burned in the combustion chamber 122, A flame detection sensor 117 for detecting the flame of the burner 113 generated during the combustion and a flame detection sensor 117 for detecting the flame of the second And a temperature sensor (116). &Lt; RTI ID = 0.0 &gt; [0002] &lt; / RTI &gt;
The method according to claim 1,
The combustion unit 110 further includes a flue pipe arranged to surround the combustion chamber 122,
Wherein the air blown from the air supply unit (120) flows into a space between the combustion chamber (122) and the flue tube.
15. The method of claim 14,
The air flowing upward between the combustion chamber 122 and the flue pipe flows into the combustion chamber 122 to lower the temperature of the exhaust gas to the side of the combustion chamber 122 and the heat of the combustion chamber 122 is discharged laterally Wherein the air inlet hole is inclined upward toward the combustion chamber (122) side so as to prevent air from entering the combustion chamber (122).
The combustion apparatus (100) according to any one of claims 1 to 15;
A storage tank 200 storing a combustible gas in a liquefied state;
A compression line (220) or an uncompressed line (210) installed to flow the combustible gas vaporized in the storage tank (200) to the combustion apparatus (100);
An output device including at least one of an engine (230), a boiler (240) and a generator (250) to which a part of the combustible gas flowing in the compression line (220) is supplied,
The compression line 220 is provided with a compressor 221 or a heater 222 for processing a combustible gas flowing to an output device,
Wherein the compression line (220) and the uncompressed line (210) are provided with a control valve (211) for controlling the flow of the combustible gas.

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