Low NOX burner system using two-fluid injection

Abstract

A low NOx burner system using two-fluid injection according to the present invention comprises: a water supply unit that pumps water from a water storage tank therein and supplies the water to a steaming unit in a combustion chamber via a water supply pipe; a pyrolysis oil supply unit that pumps pyrolysis oil from a pyrolysis oil storage tank therein and supplies the pyrolysis oil to an injection nozzle unit in the combustion chamber via a pyrolysis oil supply pipe; a starting oil supply unit that pumps a starting oil from a starting oil storage tank therein and supplies the starting oil to the injection nozzle unit in the combustion chamber via a starting oil supply pipe; and a precipitate discharge unit that is provided in a longitudinal-transverse joint zone of a pyrolysis supply pipe disposed between the pyrolysis oil storage tank and the injection nozzle unit, and can discharge precipitates contained in the pyrolysis oil and precipitated under the control of a control unit.

Description

Low NOx burner system using fluid injection

[0001] The present invention relates to a low-NOx burner system using a fluid injection, and more specifically, to a low-NOx burner system using a fluid injection that minimizes the generation of NOx by simultaneously injecting waste plastic pyrolysis oil obtained by processing waste plastic and high-temperature steam, while simultaneously preventing hardening of the waste plastic pyrolysis oil within the discharge path when the burner system is turned off.

[0002] Ordinary fuel oil is a major cause of air pollution because it is exhausted leaving behind pollutants as a single atomized particle is ignited and burned, and large amounts of pollutants such as nitrogen oxides are generated when industrial waste is incinerated, causing significant environmental pollution.

[0003] The government is implementing various policies to develop alternative energy, improve the efficiency of existing energy, and minimize environmental pollution. The Ministry of Environment is actively encouraging the use of emulsion fuel oil in accordance with the performance standards and inspection methods for air pollution control facilities (combustion aids).

[0004] Unlike ordinary fuel oil, emulsion fuel oil has high combustion efficiency, making it a fuel with very high energy efficiency and pollution prevention capabilities. However, if it is left unattended for a long time during transportation and storage, oil-water separation occurs, making it very difficult to commercialize it as a fuel.

[0005] A method of mixing water with kerosene and burning it has long been proposed as a way to increase the combustion efficiency of kerosene and suppress the generation of pollutants associated with combustion, such as soot and nitrogen oxides (NOx).

[0006] The theoretical background explaining that kerosene can be burned even when mixed with water, and that this improves the combustion efficiency, is as follows.

[0007] When oil is burned while surrounded by water particles, the water particles vaporize due to heat conduction, and the vaporized water vapor expands in volume (about 5800 times) and diffuses the oil layer, causing atomization and helping to achieve complete combustion of the oil.

[0008] In addition, it is known that at high temperatures, water (H2O) acts as a combustion aid by causing a series of radical reactions in which it is released into oxygen (O), hydrogen (H), and hydroxyl groups (OH).

[0009] In other words, at high temperatures, water vapor decomposes to produce hydrogen radicals (H·), and these hydrogen radicals (H·) combine with oxygen molecules (O2) to form oxygen radicals (O) and water. ····① Equation

[0010] The oxygen radical (O) generated in Equation ① combines with a hydrogen molecule in Equation ② to become a hydroxyl radical (OH) and a hydrogen radical (H·). ····Equation ②

[0011] In equation ③, the hydroxyl radical combines with a hydrogen molecule to become water and a hydrogen radical.

[0012] In equation ④ as well, water vapor (H2O) and hydrogen combine to produce water and hydrogen radicals. In this way, the reaction from equation ① to ④ proceeds in a complex form and promotes combustion.

[0013] ① Equation...... 2H + O2 → · O · + H2O : Continuous reaction

[0014] ② Equation...... H2 + ·O · → ·OH + H : Continuous reaction

[0015] ③ Equation...... · OH + H2 → H2O + H · : Continuous reaction

[0016] ④ Equation...... H2O + H2 → H2O + 2H : Continuous reaction

[0017] As it became known that kerosene and water could be mixed and used as fuel, research on methods to increase the combustion efficiency of kerosene based on this principle spread widely worldwide. Although many technical proposals were made regarding this, practical technologies have not yet been actively utilized.

[0018] The reason is that the mixing ratio of kerosene and water must be within a specific range, and this mixture must be maintained in a stable emulsion state where oil-water separation does not occur until the combustion stage, and the manufacturing device for emulsion fuel oil or the equipment using it must be practical, but this has not been technically resolved.

[0019] In addition, when emulsifying fuel and water, fuel oil has a specific HLB (Hydrophilic-Lypophilic Balance) value required for emulsification with water depending on its type. Therefore, in order to produce a useful emulsion fuel oil that maintains an emulsified state for a long period, the HLB value of the emulsifier must be precisely matched to the specific HLB value of the fuel oil to be applied. However, one of the reasons why emulsion fuel oil has not been commercialized is that conventional methods have not been able to technically match this accurately.

[0020] In other words, although kerosene and water can be maintained in an emulsion state for a short period of time, fuel takes a long time to reach the actual use stage after passing through the transportation and storage stages. Since petroleum and water are incompatible, oil-water separation occurs during this process, and the above effect cannot be expected from the separated mixture.

[0021] Recently, an oil-water mixed emulsion method has been proposed that uses an emulsion generating device (e.g., an oil-water stirring device and an ultrasonic device) to physically mix water and fuel to create an emulsion state without using an emulsifier.

[0022] However, during the supply of an emulsion-state oil-water mixture, i.e., emulsion fuel, from the emulsion generator to the combustion device, the emulsion fuel separates into water and fuel. In other words, the oil-water mixed emulsion method has the problem of having to satisfy conditions that require stabilizing the emulsion state and ensuring the lifespan and reliability of the emulsion generator, and also has the problem of increasing manufacturing costs and making the overall configuration of the facility complex because it must include emulsion generators such as an oil-water stirring device and an ultrasonic device.

[0023] Therefore, there is a need for research and development of an injection device that can achieve efficient water gasification without requiring a separate emulsion generation device.

[0024] The present invention aims to provide a low-NOx burner system using a fluid injection that can suppress the generation of carbon monoxide by simultaneously injecting pyrolysis oil and high-temperature steam and completely combusting the pyrolysis oil using oxygen decomposed from the high-temperature steam.

[0025] In addition, another objective of the present invention is to provide a low-NOx burner system using fluid injection that can minimize the generation of NOx caused by nitrogen components in the external air by simultaneously injecting pyrolysis oil and high-temperature steam, thereby utilizing oxygen decomposed from the high-temperature steam and using less oxygen contained in the external air.

[0026] In addition, another objective of the present invention is to provide a low-NOx burner system using fluid injection that can prevent the hardening of pyrolysis oil within the pyrolysis oil supply pipeline by using starting oil to discharge the pyrolysis oil remaining in the pyrolysis oil supply pipeline up to the injection nozzle through the injection nozzle when the burner system is turned off.

[0027] In addition, another objective of the present invention is to provide a low-NOx burner system using fluid injection capable of discharging precipitates contained in pyrolysis oil by forming a precipitate discharge section in the longitudinal and transverse joint zone of the pyrolysis oil supply pipeline disposed between the pyrolysis oil tank and the injection nozzle.

[0028] The problems solved by the present invention are not limited to those mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

[0029] A low NOx burner system using a fluid injection according to the present invention comprises: a water supply unit that pumps water from an internal water storage tank and supplies it to a steaming unit in a combustion chamber through a water supply pipeline; a pyrolysis oil supply unit that pumps pyrolysis oil from an internal pyrolysis oil storage tank and supplies it to an injection nozzle unit in the combustion chamber through a pyrolysis oil supply pipeline; a starting oil supply unit that pumps starting oil from an internal starting oil storage tank and supplies it to an injection nozzle unit in the combustion chamber through a starting oil supply pipeline; and a sediment discharge unit provided in a longitudinal and transverse joint zone of a pyrolysis supply pipeline disposed between the pyrolysis oil storage tank and the injection nozzle unit, capable of discharging a sediment contained in the pyrolysis oil and settled according to the control of a control unit.

[0030] Preferably, the control unit can provide starting oil supplied from the starting oil supply unit to the pyrolysis oil supply connection pipe disposed between the sediment discharge unit and the pyrolysis oil supply connection within the injection nozzle unit when the low NOx burner system is terminated.

[0031] Preferably, the control unit may control the steps of: closing a first solenoid valve disposed on the pyrolysis oil supply pipeline between the pyrolysis storage tank and the sediment discharger in the sediment discharge unit; opening a second solenoid valve disposed on the starting oil supply pipeline between the starting oil storage tank and the sediment discharger to supply starting oil to the injection nozzle unit; and closing the second solenoid valve.

[0032] Preferably, the starting oil supply step is characterized by supplying the starting oil at a pressure of 2 to 12 bar for 10 to 80 seconds, or supplying 5 to 500 times the volume of the pyrolysis oil supply connection pipe.

[0033] Preferably, the control unit may perform the steps of: closing a first solenoid valve disposed on the pyrolysis oil supply pipeline between the pyrolysis storage tank and the sediment discharger in the sediment discharge section; closing a second solenoid valve disposed on the starting oil supply pipeline between the starting oil storage tank and the sediment discharger; and closing a fifth solenoid valve disposed between the sediment discharger and the pyrolysis oil inlet of the first assembly nozzle port in the injection nozzle unit; opening a third solenoid valve disposed on the outside air supply pipeline between the air pump and the sediment discharger and a fourth solenoid valve disposed to be exposed to the outside downward from the bottom surface of the sediment discharger; and controlling the air pump to perform the step of supplying air at a predetermined pressure to the sediment discharger for a second predetermined time.

[0034] Preferably, the control unit can control the supply of starting oil to the injection nozzle unit when the temperature inside the combustion chamber reaches a first predetermined temperature due to the ignition of the starting oil, and control the injection of pyrolysis oil in an emulsion state mixed with steam from the steaming unit and the pyrolysis oil, and control the amount of air flowing into the combustion chamber to decrease when the temperature inside the combustion chamber reaches a second predetermined temperature higher than the first predetermined temperature.

[0035] Preferably, the second predetermined temperature is 1,000 to 1,350 degrees Celsius.

[0036] According to the low-NOx burner system using the injection of the present invention, the generation of carbon monoxide can be suppressed by simultaneously injecting pyrolysis oil and high-temperature steam and completely combusting the pyrolysis oil using oxygen decomposed from the high-temperature steam. Furthermore, by simultaneously injecting pyrolysis oil and high-temperature steam and utilizing oxygen decomposed from the high-temperature steam while using less oxygen contained in the external air, the generation of NOx caused by nitrogen components contained in the external air can be minimized. Additionally, when the burner system is turned off, the pyrolysis oil remaining in the pyrolysis oil supply pipeline up to the injection nozzle can be discharged through the injection nozzle using starting oil, thereby preventing the hardening of the pyrolysis oil within the pyrolysis oil supply pipeline. Moreover, by forming a sediment discharge section in the longitudinal and transverse joint zone of the pyrolysis oil supply pipeline positioned between the pyrolysis oil tank and the injection nozzle, the sediment contained in the pyrolysis oil can be discharged.

[0037] The effects of the present invention are not limited to those mentioned above, and other unmentioned problems will be clearly understood by those skilled in the art from the description below.

[0038] FIG. 1 is a schematic diagram showing a low-NOx burner system using fluid injection according to an embodiment of the present invention, and

[0039] FIG. 2 is an enlarged view of area "A" in the schematic diagram of a low-NOx burner system using a fluid injection according to an embodiment of the present invention shown in FIG. 1.

[0040] Further objects, features, and advantages of the present invention can be more clearly understood from the following detailed description and the accompanying drawings.

[0041] Before providing a detailed description of the present invention, it should be understood that the present invention is capable of various modifications and may have various embodiments, and that the examples described below and illustrated in the drawings are not intended to limit the present invention to specific embodiments, but rather include all modifications, equivalents, and substitutions that fall within the spirit and scope of the present invention.

[0042] When it is stated that one component is "connected" or "connected" to another component, it should be understood that while it may be directly connected or connected to that other component, there may also be other components in between. On the other hand, when it is stated that one component is "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between.

[0043] The terms used in this specification are used merely to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, terms such as "comprising" or "having" are intended to indicate the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0044] Furthermore, in the description referring to the attached drawings, identical components are assigned the same reference numeral regardless of drawing symbols, and redundant descriptions thereof are omitted. In describing the present invention, if it is determined that a detailed description of related prior art could unnecessarily obscure the essence of the present invention, such detailed description is omitted.

[0045]

[0046] FIG. 1 is a schematic diagram showing a low-NOx burner system using a fluid injection according to an embodiment of the present invention, and FIG. 2 is an enlarged view of area "A" of the schematic diagram of the low-NOx burner system using a fluid injection according to an embodiment of the present invention shown in FIG. 1.

[0047] A low NOx burner system using fluid injection according to one embodiment of the present invention includes a water supply unit (110: 111, 113, 115, 117, 118, 119), a pyrolysis oil supply unit (120: 121, 122, 123, 125, 127, 128, 129), a starting oil supply unit (130: 131, 133, 135, 137, 138, 139), an air supply unit (140: 141, 145, 149), a sediment discharge unit (150), a combustion chamber (160), and a control unit (not shown).

[0048] The water supply unit (110) includes a water storage tank (111) in which water is stored, a water supply pump (113) that pumps water from the water storage tank (111) and supplies it to the combustion chamber (160), a water supply solenoid valve (115) that controls the supply of water and is provided in the water supply pipeline (119) to supply water, a water flow control valve (117) that controls the supply flow rate of water and is provided in the water supply pipeline (119), and a water flow measuring gauge (118) that measures the supply flow rate of water and is provided in the water supply pipeline (119).

[0049] The pyrolysis oil supply unit (120) includes a pyrolysis oil storage tank (121) in which pyrolysis oil is stored, a pyrolysis oil supply pump (123) that pumps pyrolysis oil from the pyrolysis oil storage tank (121) and supplies it to a nozzle unit (161), a pyrolysis oil control solenoid valve (125) provided in a water supply pipeline (119) to supply pyrolysis oil and controls the supply of pyrolysis oil, a pyrolysis oil flow rate control valve (127) provided in a pyrolysis oil supply pipeline (129) to control the supply flow rate of pyrolysis oil, and a pyrolysis oil flow rate measuring gauge (128) provided in a pyrolysis oil supply pipeline (129) to measure the supply flow rate of pyrolysis oil.

[0050] Additionally, the pyrolysis oil supply unit (120) may be configured to preheat the pyrolysis oil to a predetermined temperature through a preheating unit (122) and supply it.

[0051] The starting oil supply unit (130) includes a starting oil storage tank (131) in which starting oil is stored, a starting oil supply pump (133) that pumps starting oil from the starting oil storage tank (131) and supplies it to a nozzle unit (161), a starting oil control solenoid valve (135) provided in a starting oil supply pipeline (139) to control the supply of starting oil, a starting oil flow control valve (137) provided in the starting oil supply pipeline (139) to control the supply flow rate of starting oil, and a starting oil flow measuring gauge (138) provided in the starting oil supply pipeline (139) to measure the supply flow rate of starting oil. In the present invention, the starting oil may be diesel oil or kerosene.

[0052] The air supply unit (140) includes an air pump (141) that pumps outside air and supplies it to a sediment discharge unit (160), and an outside air control solenoid valve (145) that is provided in an outside air supply conduit (149) through which outside air is supplied and controls the supply of outside air.

[0053] The sediment discharge section (150) is formed by providing a sediment discharger (220) and first to fifth solenoid valves (221, 223, 225, 227, 229) in the longitudinal and transverse joint zone of the pyrolysis oil supply pipe (129) positioned between the pyrolysis oil storage tank (121) and the injection nozzle unit (161), and is responsible for the function of discharging sediment contained in the pyrolysis oil. Here, the longitudinal and transverse joint zone refers to the area where the vertically positioned pyrolysis oil supply pipe (129) and the horizontally positioned pyrolysis oil supply pipe (129) are connected.

[0054] Specifically, the first solenoid valve (221) is positioned on the pyrolysis oil supply pipeline (129) between the pyrolysis oil storage tank (121) and the sediment discharger (220). The second solenoid valve (223) is positioned on the starting oil supply pipeline (139) between the starting oil storage tank (131) and the sediment discharger (220), and is connected to the pyrolysis oil supply pipeline (129) between the first solenoid valve (221) and the sediment discharger (220). The third solenoid valve (2250) is positioned on the outside air supply pipeline (149) between the air pump (141) and the sediment discharger (220). The fourth solenoid valve (227) is positioned so as to be exposed to the outside air downward from the bottom surface of the sediment discharger (220). The fifth solenoid valve (229) is positioned between the sediment discharger (220) and the pyrolysis oil inlet (231b) of the first assembly nozzle.

[0055] The combustion chamber (160) includes an injection nozzle unit (161), a steaming unit (163), an ignition unit (165), and a steam feedback pipe (169).

[0056] The injection nozzle unit (161) has a nozzle body (230) in which a first assembly nozzle port (231) and a second assembly nozzle port (233-1, 233-2) are detachably assembled at the front end, a steam inlet channel (241) formed longitudinally through one side of the nozzle body (230) to form a channel for steam in an emulsion state to flow in, one or more starting oil inlet channels (243-1, 243-2) formed longitudinally through the other side of the nozzle body (230) to form a channel for starting oil, such as crude oil refined oil (e.g., kerosene or diesel oil), to flow in for initial starting (preheating) of a combustion device, and a nozzle steam inlet (231a) detachably coupled to the front end of the nozzle body (230) and coupled in alignment with the steam inlet channel (241), and a pyrolysis oil supply to feed pyrolysis oil from the outside into the nozzle steam inlet (231a). It includes a first assembly nozzle (231) having a pyrolysis oil supply connector (231b) connected to a pipeline (129) on one side, and a second assembly nozzle (233-1, 233-2) formed to have a starting oil inlet (233a) that is detachably coupled to the front end of the nozzle body (230) and coupled in line with the starting oil inlet passage (243-1, 243-2).

[0057] The steaming unit (163) is provided in the combustion chamber (160) and is configured to steam water supplied by the water supply unit (110) in a high-temperature environment that occurs after ignition of the combustion device, and to supply the steam to the injection nozzle unit (161).

[0058] Specifically, the steaming unit (163) is composed of tubular bodies arranged in a coil or spiral shape along the external and / or internal longitudinal direction of the combustion chamber (160), or arranged in a zigzag shape along the external and / or internal longitudinal direction of the combustion chamber (160), and one end of the tubular body is connected to the water supply pipe (119) of the water supply unit (110), and the other end of the tubular body is connected to one end of the steam feedback pipe (169), and the other end of the steam feedback pipe (169) is connected to the nozzle steam inlet (231a) of the injection nozzle unit (161).

[0059] And the steam feedback pipe (169) is equipped with a pressure gauge (not shown) that can check the steam pressure.

[0060] The ignition unit (165) is configured to be provided on one side of the injection nozzle unit (161) and to perform the function of igniting the starting oil ejected from the injection nozzle unit (161). Known ignition means may be employed, and a detailed description thereof is omitted.

[0061]

[0062] Hereinafter, the operation of a low-NOx burner system using fluid injection according to an embodiment of the present invention will be described.

[0063] First, when the low-NOx burner system starts operating, starting oil is supplied from the starting oil supply unit (130) to the injection nozzle unit (161), and the ignition unit (165) ignites the starting oil ejected from the injection nozzle unit (161) to maintain the ignition state by the starting oil for a predetermined time (e.g., 1 to 10 minutes), thereby raising the temperature inside the combustion chamber (160). Meanwhile, an air inlet (not shown) is formed near the ignition unit (165) to allow air to flow into the combustion chamber (160) from the outside. When the temperature inside the combustion chamber (160) reaches a first predetermined temperature (e.g., 500 degrees), pyrolysis oil is supplied from the pyrolysis oil supply unit (120) to the pyrolysis oil supply connection port (231b) of the injection nozzle unit (161), and the starting oil supply unit (130) and the ignition unit (165) are blocked.

[0064] Subsequently, water is supplied from the water supply unit (110) to the steaming unit (163), and as the temperature rises in the combustion chamber (160), the water is steamed in the steaming unit (163), and the steam is introduced into the nozzle steam inlet (231a) through the steam feedback pipe (169). Then, the pyrolysis oil introduced into the pyrolysis oil supply connection (231b) and the steam introduced into the nozzle steam inlet (231a) are mixed together, and the pyrolysis oil in an emulsion state is ejected through the steam inlet path (241).

[0065] Subsequently, when the temperature inside the combustion chamber (160) reaches a second predetermined temperature (e.g., 1000 to 1350 degrees Celsius), some of the water vapor inside the steaming unit (163) is separated into oxygen and hydrogen, and the separated oxygen is used for the combustion of the pyrolysis oil. Accordingly, the amount of external air introduced through the air inlet for the combustion of the pyrolysis oil can be reduced, and the generation of NOx can be reduced as the introduction of external air containing nitrogen components is reduced.

[0066]

[0067] Meanwhile, the pyrolysis oil used as fuel in the system of the present invention begins to harden at approximately 14 degrees Celsius or lower. Therefore, in the present invention, when the system operation ends, starting oil is supplied to the pyrolysis oil supply connection pipe (259) between the sediment discharge section (150) and the injection nozzle unit (161) to remove the pyrolysis oil accumulated in the pyrolysis oil supply connection pipe (259) between the sediment discharge section (150) and the injection nozzle unit (161). The method for removing the pyrolysis oil accumulated in the pyrolysis oil supply connection pipe (259) between the sediment discharge section (150) and the injection nozzle unit (161) is as follows.

[0068] First, the control unit closes the first solenoid valve (221) to block the pyrolysis oil from flowing into the injection nozzle (231).

[0069] Second, the control unit opens the second solenoid valve (223) and the starting oil supply valve (251) to supply starting oil to the pyrolysis oil supply connector (231b) through the pyrolysis oil supply connector pipe (259) for about 10 to 80 seconds at a pressure of 2 to 12 bar. At this time, increasing the supply pressure of the starting oil can shorten the supply time, and lowering the supply pressure can lengthen the supply time. Alternatively, starting oil can be supplied in an amount of 5 to 500 times the internal volume of the pyrolysis oil supply connector pipe (259).

[0070] Third, the control unit closes the starting oil supply valve (251) and the second solenoid valve (223) to terminate the pyrolysis oil sediment removal procedure.

[0071]

[0072] In addition, since the pyrolysis oil supplied from the pyrolysis oil storage tank (121) is produced by recycling various types of waste plastics, the quality of the pyrolysis oil is not homogeneous, and precipitates exist within the pyrolysis oil. Furthermore, because a pipeline cannot be formed at the same height from the pyrolysis oil storage tank to the injection nozzle, a pyrolysis oil supply pipeline longitudinal-transverse joint zone exists between the pyrolysis oil storage tank and the injection nozzle, where a longitudinal pyrolysis oil supply pipeline and a thermal pyrolysis oil supply pipeline are connected. It is necessary to form a precipitate discharge section in this pyrolysis oil supply pipeline longitudinal-transverse joint zone to discharge the precipitates contained in the pyrolysis oil. According to one embodiment of the present invention, the precipitates accumulated in the precipitate discharger (220) formed in the pyrolysis oil supply pipeline longitudinal-transverse joint zone can be discharged by selectively operating a plurality of solenoid valves. The method for discharging the precipitates accumulated in the precipitate discharger (220) is as follows.

[0073] First, the control unit closes the first solenoid valve (221), the second solenoid valve (223), and the fifth solenoid valve (229).

[0074] Second, the control unit opens the third solenoid valve (225) and the fourth solenoid valve (227).

[0075] Third, the control unit controls the air pump (141) to supply air at a predetermined pressure to the sediment discharger (220) for a predetermined time (e.g., 1 to 10 minutes). Accordingly, the sediment settled at the bottom of the sediment discharger (220) is discharged to the outside through the fourth solenoid valve (227) by the supplied air.

[0076] Fourth, when the above predetermined time has elapsed, the control unit terminates the operation of the air pump (141) and closes the third solenoid valve (225) and the fourth solenoid valve (227) to terminate the sediment discharge procedure.

[0077]

[0078] The embodiments described in this specification and the accompanying drawings are merely illustrative of a part of the technical concept included in the present invention. Accordingly, since the embodiments disclosed in this specification are intended to explain, not limit, the technical concept of the present invention, it is obvious that the scope of the technical concept of the present invention is not limited by these embodiments. All variations and specific embodiments that can be easily deduced by a person skilled in the art within the scope of the technical concept included in the specification and drawings of the present invention should be interpreted as being included within the scope of the rights of the present invention.

Claims

1. A water supply unit that pumps water from an internal water storage tank and supplies it to a steaming unit in a combustion chamber through a water supply pipeline; A pyrolysis oil supply unit that pumps pyrolysis oil from an internal pyrolysis oil storage tank and supplies it to an injection nozzle unit in the combustion chamber through a pyrolysis oil supply pipeline; A starting oil supply unit that pumps starting oil from an internal starting oil storage tank and supplies it to an injection nozzle unit in the combustion chamber through a starting oil supply pipeline; and A sediment discharge unit provided in the longitudinal and transverse joint zone of the pyrolysis supply pipeline disposed between the pyrolysis oil storage tank and the injection nozzle unit, capable of discharging sediment contained in the pyrolysis oil and settled according to the control of the control unit. A low-NOx burner system using a fluid injection including 2. In Claim 1, A low-NOx burner system using fluid injection, characterized in that the control unit provides starting oil supplied from the starting oil supply unit to a pyrolysis oil supply connection pipe disposed between the sediment discharge unit and the pyrolysis oil supply connection within the injection nozzle unit when the low-NOx burner system is terminated.

3. In claim 2, the control unit is, A step of closing a first solenoid valve disposed on the pyrolysis oil supply pipeline between the pyrolysis storage tank and the sediment discharger in the sediment discharge section; A starting oil supply step of supplying starting oil to the injection nozzle unit by opening a second solenoid valve disposed on the starting oil supply pipeline between the starting oil storage tank and the sediment discharger; and Step of closing the second solenoid valve A low-NOx burner system using a fluid injection characterized by controlling to perform [the following].

4. In Claim 3, A low-NOx burner system using fluid injection, characterized in that the above-mentioned starting oil supply step supplies the starting oil at a pressure of 2 to 12 bar for 10 to 80 seconds, or supplies 5 to 500 times the volume of the pyrolysis oil supply connection pipe.

5. In Claim 1, The control unit comprises the steps of: closing a first solenoid valve disposed on the pyrolysis oil supply pipeline between the pyrolysis storage tank and the sediment discharger within the sediment discharge section; closing a second solenoid valve disposed on the starting oil supply pipeline between the starting oil storage tank and the sediment discharger; and closing a fifth solenoid valve disposed between the sediment discharger and the pyrolysis oil inlet of the first assembly nozzle port within the injection nozzle unit; opening a third solenoid valve disposed on the external air supply pipeline between the air pump and the sediment discharger and a fourth solenoid valve disposed to be exposed to the outside downward from the bottom surface of the sediment discharger; and the air pump injecting air at a predetermined pressure into the sediment discharger for a second predetermined time, characterized in that it is a low NOx burner system using fluid injection.

6. In Claim 1, A low-NOx burner system using fluid injection, characterized in that the control unit blocks the supply of starting oil to the injection nozzle unit when the temperature inside the combustion chamber reaches a first predetermined temperature due to the ignition of the starting oil, controls the injection of pyrolysis oil in an emulsion state mixed with steam from the steaming unit, and controls the amount of air flowing into the combustion chamber to decrease when the temperature inside the combustion chamber reaches a second predetermined temperature higher than the first predetermined temperature.

7. In Claim 6, A low-NOx burner system using fluid injection, characterized in that the second predetermined temperature is 1,000 to 1,350 degrees Celsius.

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