WO2005088206A1

WO2005088206A1 - Industrial boiler by using brown gas

Info

Publication number: WO2005088206A1
Application number: PCT/KR2004/000567
Authority: WO
Inventors: Jang-Soo Hyun; Jin-Won Park
Original assignee: E & E Corporation
Priority date: 2004-03-17
Filing date: 2004-03-17
Publication date: 2005-09-22

Abstract

An industrial boiler using Brown gas burner includes a heat-generating part which is provided with a combustion chamber; a heat-release part in which heat and gas generated at the combustion chamber are discharged after circulation; and a heated water container in which a water heated by the circulation of the heat from the heat-generating part to the heat-release part 250 is contained, wherein the combustion chamber is located in a central portion of the heat generating part, the combustion chamber including: at least one Brown gas burner; and a heat emitter which is heated to high temperature by flame of the at least one Brown gas burner.

Description

INDUSTRIAL BOILER BY USING BROWN GAS

Technical Field The present invention relates to an industrial boiler, and more particularly, to an industrial boiler that uses

Brown gas in such a manner that a burner using Brown gas or mixture of Brown gas and fossil fuel applies heat directly to a heat emitter disposed in a combustion chamber.

Background Art A boiler is widely used to heat water for heating a room or supplying hot water. There is shown a general structure of a boiler of related art in FIG. 1. FIG. 1 is a schematic sectional view illustrating a boiler of related art. Referring to FIG. 1, a boiler 100 of related art has a combustion chamber 12 within a bottom of a body 10 thereof and a burner 20 disposed in the combustion chamber 12. A flame of the burner 20 heats the combustion chamber 12 and a heated gas thereof passes through a plurality of smoke tubes

13 which pierces water containing space 16 in order to heats the water C, and then the gas gathers in an exhaust gas collector 14 and is exhausted to an outside through an exhaust vent 15. The general structure of the related art boiler is also employed for industrial applications that need bigger size and bigger burner compared to home applications. Herein, the large-sized burner for industrial applications typically preheats gas or air with the heat of waste gas. A burner using a fuel like diesel oil, kerosene, or the like is called an oil burner and functions as a kind of sprayer such that disperses oil droplets and thus forms fog of oil by using compressed air or pressurized steam. The fuel sprayed from the burner is ignited through an igniter such as a spark plug to form high temperature flame. The flame heats the combustion chamber 12 of the boiler 100. However, bunker C oil that is widely used as a fuel of the burner is restricted in its use because of increasingly serious environmental pollution. Although gas fuels causing less pollution than oil fuels are recommended, there is a tendency for people to be reluctant to use the gas fuel because of cost. Particularly, boilers in industrial fields are large- sized and thus require large amount of fuel so that cost is increased and competitiveness is lowered. Accordingly, the need of alternative energy has been emphasized, and enormous expenses have been invested in the development of the alternative energy, such as solar heat, wind force and subterranean heat. However, remarkable advance has not been made and the alternative energy has been merely used as an assistant heating energy. Therefore, it is no exaggeration to say that there is no alternative energy for industrial use in which a large amount of energy is needed. As one of methods for solving the above problems, the use of Brown gas is recently highlighted. Brown gas is a gas obtained by electrolysis of water and it is a mixed gas of hydrogen and oxygen in the ratio of 2:1. Generally, if water is electrolyzed, hydrogen and oxygen are generated in a negative pole and a positive pole respectively. At this point, Brown gas can be obtained by simultaneously collecting two gases, not by separately collecting them. Unlike general gases, Brown gas has a peculiar property that causes an implosion phenomenon during the combustion. The flame generated during combustion of the Brown gas is inwardly gathered to form a focus and make surroundings vacuous . In other words, the flame of Brown gas continuously implodes and thus forms a pinpoint flame that has elongated shape. Though the flame accumulates small amount of heat, it can fuse heat-resistant ceramic material at the pinpoint thereof. Like this, the flames of Brown gas have a strong thermal power enough to perform a flame drilling. The flame of Brown gas has a peculiar property that hydrogen and oxygen of atomic and molecular states are reacted. Since hydrogen atom and oxygen atom are penetrated into an atomic nucleus of a heating target material, it produces the result that the material heated by a thermonuclear reaction due to hydrogen and oxygen is heated by much hotter flame than those occurring when the Brown gas is burnt alone in air. Further, since heat rays are not radiated outwardly, there is no loss of energy that is caused by a radiant heat, Such that excellent energy efficiency is obtained. Since Brown gas itself contains oxygen, an additional oxygen supply is unnecessary during the combustion of Brown gas. Furthermore, there is no pollution problem since only water is generated as combustion products. Because the Brown gas that has peculiar properties as described above consists of hydrogen, which is the most flammable fuel, and oxygen as comburent, a burner using the Brown gas has great benefits of efficiency and cost effectiveness . Therefore, an industrial boiler provided with the burner using Brown gas also has high efficiency. However, the industrial boiler using Brown gas has not been developed in reality. Further, in case of the boiler of related art, the flame generated by gas burner heats the combustion chamber and the heated gas of the combustion chamber operates the boiler but in case of the Brown gas, as described above, the flame thereof continuously implodes and thus has small amount of accumulative heat so that there is a problem that the Brown gas itself can't operate the boiler.

Disclosure of the Invention Accordingly, the present invention is directed to an industrial boiler using a Brown gas burner that substantially obviates one or more of the problems due to limitations and disadvantages of the related art. An object of the present invention is to provide an industrial boiler using Brown gas burner in which flame of Brown gas is generated by a Brown gas only burner or a mixture, of Brown gas and fossil fuel, only burner and is used to directly heat a heat emitter that is provided in a combustion chamber. The heat emitter is heated to high temperature to operate the boiler. Fixing plates having a plurality of holes are disposed at a top and a bottom of the combustion chamber in order to efficiently circulate heat and gas of the combustion chamber. In this manner, the boiler of the present invention prevents environmental pollution and maximizes efficiency of the boiler with little fuel cost. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings . To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described, there is provided an industrial boiler including: a heat-generating part provided with a combustion chamber; a heat-release part in which heat and gas generated at the combustion chamber are discharged after circulation; and a heated water container where a water heated by the circulation of the heat from the heat-generating part to the heat-release part 250 is contained, wherein the combustion chamber is located in a central portion of the heat- generating part, the combustion chamber including: at least one Brown gas burner; and a heat emitter which is heated to high temperature by flame of the at least one Brown gas burner . Herein, the heat-generating part includes the combustion chamber and heat transfer rooms which are located over and under the combustion chamber, wherein the combustion chamber is provided at a top and a bottom with fixing plates, the fixing plates formed with a plurality of holes and fixing the combustion chamber. Further, each of the heat transfer rooms includes: a plurality of water transfer tubes through which the heated water is transferred to the heated water container; and a plurality of heat transfer tubes disposed on one side of the each of the heat transfer rooms and through which heat and gas of the combustion chamber are transferred to the heat- release part, wherein the heat transfer tubes have inner surfaces coated with a ceramic material in order to prevent corrosion. Herein, the Brown gas burner is a Brown gas only burner or a mixture, of Brown gas and fossil fuel, only burner, wherein the Brown gas burner is further provided with: a Brown gas generator which supplies Brown gas to the Brown gas burner; a gas supply passage which connects the Brown gas burner and the Brown gas generator; and a solenoid valve which is installed in the gas supply passage for automatically supplying and intercepting the Brown gas. Further, the Brown gas generator is provided with a heat exchanger, the heat exchanger being so made that an entrance of a water inlet pipe is surrounded with a turned tube in which waste heat of the heat exchanger is generated. Furthermore, the heat emitter is formed with a central passage that penetrates inner center thereof, or the heat emitter is formed with the central passage that penetrates inner center thereof and formed on a wall with a plurality of heat emitting holes in order to efficiently emit heat out of the central passage. The heat emitter is made of a heat- resistant material coated with a ceramic material, a nickel, a nickel/chromium alloy, or a tungsten, which is not melted by high- temperature flame and does not generate noxious substance.

Brief Description of the Drawings The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. In the drawings: FIG. 1 is a sectional view schematically illustrating a boiler of related art; FIGS. 2a and 2b are a perspective view and a sectional view illustrating an interior structure of an industrial boiler using Brown gas in accordance with an embodiment of the present invention; and FIGS. 3a and 3b are a view illustrating a heat emitter disposed in a combustion chamber in accordance with the present invention.

Best Mode for Carrying Out the Invention Hereinafter, preferred embodiments of the present invention will be described in detail with reference to accompanying drawings . FIGS. 2a and 2b are a perspective view and a sectional view illustrating an interior structure of an industrial boiler using Brown gas in accordance with an embodiment of the present invention. A structure of the industrial boiler will now be described referring to FIGS. 2a and 2b. Within a body 200 of the industrial boiler of the present invention, there are a heat-generating part 205 which is provided with a combustion chamber 210, a heat-release part 250 where heat and gas generated at the combustion chamber 210 are discharged after circulation and a water container 230 where a heated water 232 by the circulation of the heat from the heat-generating part 205 to the heat- release part 250 is contained. The heat-generating part 205 is formed at a central portion with the combustion chamber 210 where at least one burner 212 is provided and has fixing plates 216 at top and bottom of the combustion chamber 210 to fix the combustion chamber 210. The fixing plates 216 are formed with a plurality of holes in order to pass efficiently heat and gas generated at the combustion chamber 210 through the holes to heat transfer rooms 220 and 221, which are located above and under the combustion chamber 210. Each of the heat transfer rooms 220, 221 is provided with a plurality of water transfer tubes 222 to flow water to the heated water container 230 and is formed on one side with a plurality of heat transfer tubes 224 in order to transfer heat and gas of the combustion chamber 210 to the heat- release part 250. It is characterized that inner surface of the heat transfer tubes 224 is coated with a ceramic material or the like in order to prevent corrosion. Water is supplied to the water transfer tubes 222 of the heat transfer rooms 220, 221 through a water inlet pipe 270 that is located at a bottom corner of the body 200 such that the introduced water through the water supply pipe 270 is heated as it flows in the water transfer tubes 222 which is heated by the heat of the combustion chamber 210. The heat-release part 250 includes exhaust collectors 260, 261 and an exhaust vent 262. The exhaust collectors 260, 261 receive heat and gas generated at the combustion chamber 210 through the heat transfer tubes 224 that extend respectively from the heat transfer rooms 220, 221 to the exhaust collectors 260, 261. The received heat and gas are discharged through the exhaust vent 262, which is provided in one side of the lower exhaust collector 261. As described above, the heat is generated at the combustion chamber 210 in the first and circulates through the heat transfer rooms 220,221, the heat transfer tubes 224 and exhaust collectors 260, 261 such that efficiently heats the water within the boiler body 200, after which the heat discharged through the exhaust vent 262. Further, in the present invention, a plurality of heating pipes 218 is protruded on a side of the combustion chamber 210 toward the heated water container 230 in order to additionally heat the heated water 232 that is contained in the heated water container 230. In other words, the heat generated at the combustion chamber 210 conducts to the heating pipes 218 and thus additionally heats the water that contacts with the heating pipes 218. The water that is heated as described above is discharged outwardly through a heated water outlet pipe 280. Furthermore, Referring to FIGS, the industrial boiler of the present invention further includes a Brown gas generator 290 for supplying Brown gas to the burner 212, which is provide in the industrial boiler body 200. The burner 212 can be a Brown gas only burner or a mixture, of Brown gas and fossil fuel, only burner. For instance, there will now be described an industrial boiler which has a Brown gas only burner 212. The Brown gas only burner 212 and the Brown gas generator 290 communicate through a gas supply passage 292 which is installed with a solenoid valve 294 for automatically supplying and intercepting the Brown gas. Herein, the Brown gas only burner 212 may be a patent applied one, Korean Patent Application No. 20-2003-0004172, that has applied by assignee of the present invention and the Brown gas generator 290 may be a patent applied one, Korean Patent Application No. 10-2002-0006146, that has applied by assignee of the present invention. Further, The Brown gas generator 290 is provided with a heat exchanger (not shown in the FIGS.) . In order to use waste heat of the Brown gas generator 290 to the boiler, the heat exchanger can be made that an entrance of the water inlet pipe 270 is surrounded with a turned tube where the waste heat is generated. In this manner, the temperature of water entering into the boiler in the first can be more efficiently elevated. Furthermore, to improve the efficiency of the burner moreover, adequate amount of fossil fuels can be used mixed with Brown gas instead of using Brown gas only. By mixing Brown gas with fossil fuels, high temperature of flame and perfect combustion can be maximized and it can be a revolutionary method that substantially reduces long term environmental pollution occurred form combustion of fossil fuels. The industrial boiler of the present invention is characterized that it uses a heat emitter 214 which is heated to a high temperature by the flame of the burner 212 because the flame of the burner 212 using Brown gas only or a mixture of Brown gas and fossil fuels is itself not suitable to be used as a heat source. Herein, in order to emit efficiently the heat of the heat emitter 214, the heat emitter 214 of the present invention is characterized that it is formed with a central passage 332 such that the flame and the heat of the burner 212 can flow. It is also characterized that a plurality of heat emitting holes can be formed on a wall of the heat emitter 214 in order to efficiently emit the heat out of the central passage 332. FIGS. 3a and 3b are views illustrating a structure of the heat emitter 214 that is disposed in the combustion chamber 210 of the present invention. Referring to FIG. 3a, the heat emitter 214 is characterized that it is formed with the central passage 332 which penetrates inner central portion thereof. Referring to FIG. 3b, the heat emitter 214 is also characterized that it is formed with the central passage 332 therethrough and also formed on its wall with a plurality of heat emitting holes 334 in order to efficiently emit the heat of the central passage 332 outwardly. Referring to FIGS. 3a and 3b, the heat emitter has cylindrical shape but it isn't limited this shape. That is, it can has various shapes if only it is formed with the central passage 332 therethrough and formed on its wall with a plurality of heat emitting holes 334. The heat emitter is heated to very high temperature when the flame of the Brown gas is applied due to property of the Brown gas, i.e., strong thermal power around a pinpoint of the flame. Herein, the heat of the heat emitter 214 is efficiently emitted because the heat emitter 214 is formed with the central passage 332 therethrough for flows of the flame and the heat and also formed on its wall with a plurality of heat emitting holes 334 for emitting efficiently the heat of the central passage 332 as shown in FIGS., thereby maximizing efficiency of the boiler. The heat emitter 214 can be disposed in the combustion chamber 210 in plural number in some cases. Further, the heat emitter 214 is preferably made of such materials that aren't melted by the very high- temperature flame and don't generate noxious substances, for example, heat-resistant material coated with a ceramic material, nickel, a nickel/chromium alloy, tungsten and the like.

Industrial Applicability According to the present invention, an industrial boiler using Brown gas can fundamentally prevent an environmental pollution owing to use of Brown gas. Further, a heat emitter that is heated by a flame of the Brown gas has cylindrical shape where a central passage and/or a plurality of heat emitting holes are formed such that the heat is efficiently emitted, thereby maximizing efficiency of the boiler. While the present invention has been described and illustrated herein with reference to the preferred embodiments thereof, it will be apparent to those skilled in the art that various modifications and variations can be made therein without departing from the spirit and scope of the invention. Thus, it is intended that the present invention covers the modifications and variations of this invention that come within the scope of the appended claims and their equivalents .

Claims

1. An industrial boiler using Brown gas, comprising: a heat-generating part provided with a combustion chamber; a heat-release part in which heat and gas generated at the combustion chamber are discharged after circulation; and a heated water container in which a water heated by the circulation of the heat from the heat-generating part to the heat-release part 250 is contained, wherein the combustion chamber is located in a central portion of the heat-generating part, the combustion chamber including: at least one Brown gas burner; and a heat emitter which is heated to high temperature by flame of the at least one Brown gas burner.

2. The industrial boiler using Brown gas of claim 1, wherein the heat -generating part comprises: the combustion chamber; and heat transfer rooms which are located over and under the combustion chamber, wherein the combustion chamber is provided at a top and a bottom with fixing plates, the fixing plates formed with a plurality of holes and fixing the combustion chamber.

3. The industrial boiler of claim 2, wherein each of the heat transfer rooms comprises: a plurality of water transfer tubes through which the heated water is transferred to the heated water container; and a plurality of heat transfer tubes disposed on one side of the each of the heat transfer rooms and through which heat and gas of the combustion chamber are transferred to the heat-release part.

4. The industrial boiler of claim 3, wherein the heat transfer tubes have inner surfaces coated with a ceramic material in order to prevent corrosion.

5. The industrial boiler of claim 1, wherein the heat-release part comprises: exhaust collectors; and an exhaust vent, wherein the exhaust collectors receive heat and gas generated at the combustion chamber through the heat transfer tubes that is connected respectively from the heat transfer rooms, and the received heat and gas are discharged through the exhaust vent provided in one side of the lower exhaust collector.

6. The industrial boiler of claim 1, wherein the Brown gas burner is a Brown gas only burner or a mixture, of Brown gas and fossil fuel, only burner.

7. The industrial boiler of claim 1, further comprisin : a Brown gas generator which supplies Brown gas to the Brown gas burner; a gas supply passage which connects the Brown gas burner and the Brown gas generator; and a solenoid valve which is installed in the gas supply passage for automatically supplying and intercepting the Brown gas .

8. The industrial boiler of claim 7, wherein the Brown gas generator is provided with a heat exchanger, the heat exchanger being so made that an entrance of a water inlet pipe is surrounded with a turned tube in which waste heat of the heat exchanger is generated.

9. The industrial boiler using Brown gas of claim 1, wherein the heat emitter is formed with a central passage that penetrates an inner center thereof.

10. The industrial boiler of claim 1, wherein the heat emitter is formed with a central passage that penetrates an inner center thereof and formed on a wall with a plurality of heat emitting holes in order to efficiently emit heat out of the central passage.

11. The industrial boiler of claim 1, wherein the heat emitter is provided at least one in the combustion chamber.

12 The industrial boiler of claim 1, wherein the heat emitter is made of a heat-resistant material coated with a ceramic material, a nickel, a nickel/chromium alloy, or a tungsten, which is not melted by a ultra high-temperature flame and does not generate noxious substance.