JP2011226679A - Fluid heating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve high efficiency, size reduction, and cost reduction by applying optimum design to a fluid heating device.SOLUTION: The fluid heating device is composed of a combustion device which burns fuel to generate thermal energy, and a heater which heats fluid by the thermal energy from the combustion device. The heater 1 comprises a plate part in which plates are stacked with intervals. A heating part and a heated part are so configured that the fluid having thermal energy and a heated fluid alternately flow the gap between the plates for the heated fluid to be heated. In the combustion device, the fuel is burned below the heater and the thermal energy enters the plate part from below and flows upward, and the heated fluid enters the plate part from either a lower part or a side and flows upward. The plate part of the heater is placed in a burning flame, and a plurality of smoke pipes 7 in which the combustion gas after burning flows are arranged at the rear side of the plate part with the heated fluid flowing among the smoke pipes.

Description

  The present invention relates to an apparatus for burning a fuel and heating a fluid such as a liquid by combustion gas, and more specifically, by laminating plates so that a fluid having heat energy and a fluid to be heated flow alternately upward, The present invention relates to a fluid heating device in which a heater and a smoke pipe are arranged vertically.

2. Description of the Related Art Conventionally, a configuration in which a heat transfer tube group such as a circular tube or a deformed tube called a heat collection unit is arranged in a fuel combustion unit and a heat transfer tube group of a heat recovery unit is arranged downstream is known.
In the case of using a heat transfer tube group, there is a drawback that the optimum design cannot be performed because the shape is limited and the tube pitch is limited by the welding margin. In addition, there are problems of cost increase due to complicated production and size increase due to failure to obtain an optimum shape.

Japanese Patent No. 2948180 JP 2004-324911 A JP 2001-153302 A JP 2003-185293 A

  The problem to be solved is that when designing a fluid heating device, the shape is bulky and cannot be designed in a compact optimum shape.

  In the present invention, in order to optimally design a fluid heating apparatus, a heater that heats a fluid with thermal energy from combustion is a plate portion (plate laminate) in which plates are stacked at intervals, and the thermal energy is transferred to the plate portion. The main feature is that the fluid to be heated is allowed to flow from the bottom to the top and the fluid to be heated to flow from the bottom or side to the top of the plate portion, and the heater and the smoke pipe are arranged vertically.

  The fluid heating device of the present invention is a fluid heating device comprising a combustion device that burns fuel to generate heat energy and a heater that heats fluid with the heat energy from the combustion device, and the heater keeps a gap. A fluid comprising a plate portion in which plates are stacked, and a fluid having a heat energy and a fluid to be heated flow alternately through the gap between these plates, and the fluid to be heated is heated and the fluid to be heated is configured. The combustion apparatus is configured such that fuel burns below the heater, heat energy enters the plate portion from below and flows upward, and the fluid to be heated is either below or next to the plate portion. The plate portion of the heater is placed in a combustion flame, and a plurality of smoke pipes into which the combustion gas after combustion flows are placed behind (upper) the plate portion. Is location, is characterized in that as the heated fluid flows between these smoke tubes.

  In this apparatus, the gap between the plates may be different between the heating part and the heated part. In addition, it is desirable that the gap between the plates in each heating unit is determined so that at least one of the combustion gas flow velocity and the combustion gas pressure loss is made to approach uniformly.

  In these apparatuses, the gap between the plates of the heating part may be configured to be larger than the gap between the plates of the heated part.

  In addition, the gap between the plates of the heating unit may be narrowed as it goes downstream, and the heated part may be widened as it goes downstream. As a combustion apparatus for burning fuel to generate thermal energy, a surface combustion burner using a perforated plate, a surface combustion burner using a heat-resistant metal fiber, or the like is used.

  In addition, the apparatus of the present invention is provided with an outer box surrounding a heater and a smoke pipe that heats a fluid with thermal energy, and a heated fluid is filled between the heater and the smoke pipe and the outer box, and The heating fluid plate gap is configured to communicate with the outer box.

  Further, the apparatus of the present invention is configured such that the fluid to be heated flows from the outside of the fluid heating device into the outer box through the heated fluid supply pipe provided at the lower part of the outer box, and flows out from the upper part of the outer box. Is done.

  In the apparatus of the present invention, a gas-liquid separation chamber having a gas-liquid separator communicating with a fluid to be heated is provided on the upper portion of the outer box surrounding the heater and the smoke pipe. A steam outlet is provided in one of the upper parts, and the fluid to be heated is heated and boiled to generate steam, the steam is separated from the liquid fluid in the gas-liquid separation chamber, and the steam flows out to the outside. Is configured to flow out from the lower part of the gas-liquid separation chamber.

  Furthermore, the apparatus of the present invention is provided with a liquid reservoir having a liquid fluid outlet on either the inside or outside of the lower part of the gas-liquid separation chamber, and a liquid level detector is provided in the liquid reservoir to provide a liquid level detection unit. The flow rate control valve of the liquid fluid inlet is provided at the lower part of the outer box, and this valve and the liquid level detector are connected to detect the liquid level of the liquid pool so that the liquid level becomes constant. It is configured to adjust the flow rate of the liquid fluid flowing into the outer box.

  In these apparatuses, the fluid to be heated may be an absorbing liquid, and the fluid heating apparatus may be configured as a regenerator of an absorption refrigerator.

  In the fluid heating device of the present invention, the conventional water pipe part is made into a plate type, and the smoke pipe is vertically arranged downstream thereof, so that the combustion gas flow path can be freely set and only the plate part is set. As a result, the structure becomes simple, the manufacture is easy, the cost can be reduced, and the efficiency can be improved. In addition, an optimum design can be performed, which has the advantage that the size can be reduced without wasted space.

FIG. 1 is a perspective explanatory view showing a main part of the fluid heating apparatus of the present invention. FIG. 2 is an explanatory view showing an example of the plate portion and the smoke pipe in FIG. FIG. 3 is an explanatory view showing an example of a heating part and a heated part. FIG. 4 is an explanatory view showing another example of the heating part and the heated part. FIG. 5 is an explanatory view showing still another example of the heating part and the heated part. FIG. 6 is an explanatory view showing an example of a combustion apparatus. FIG. 7 is an explanatory view showing an example of the fluid heating apparatus of the present invention. FIG. 8 is an explanatory view showing another example of the fluid heating apparatus of the present invention. FIG. 9 is an explanatory view showing still another example of the fluid heating apparatus of the present invention.

  The purpose of designing the fluid heating device in a compact and inexpensive manner is realized by using a heater for heating the fluid as a plate laminate and vertically arranging a smoke tube downstream thereof.

Examples of the present invention will be described below with reference to FIGS. 1 to 9, but the present invention is not limited to the following examples and can be implemented with appropriate modifications.
FIG. 1 shows a main part of the fluid heating apparatus of the present invention. Reference numeral 1 denotes a heater, which includes a heating part 2 and a heated part 3. A combustion device (not shown) is disposed adjacent to the lower portion of the heater 1.

  The heater 1 is composed of a plate portion in which plates 4 are stacked at intervals, and a fluid such as a gas body having thermal energy and a fluid to be heated flow through the gaps between the plates 4 alternately. It is configured to be heated. FIG. 1 shows that in a combustion device (not shown), fuel burns upward, and generated combustion gas enters the plate portion from below and flows upward, and the heated fluid enters from below or next to the plate portion and moves upward. It is configured to flow.

  Further, as shown in FIG. 2, the plate portion of the heater 1 is placed in the combustion flame 5, and a plurality of smoke pipes 7 into which the combustion gas after combustion flows are arranged behind (upper) the plate portion, The fluid to be heated flows between these smoke pipes 7.

3 and 4 show a case where the gap between the plates is different between the heating part 2 and the heated part 3, for example, when the gap of the heating part 2 is made wider than the gap of the heated part 3. FIG.
In addition, the gap between the plates in each heating unit 2 is determined so that at least one of the combustion gas flow velocity and the combustion gas pressure loss is made closer to uniform.

  FIG. 5 shows a case where the gap between the plates of the heating unit 2 is narrowed in the downstream direction and the gap between the plates of the heated unit 3 is widened in the downstream direction.

  As a combustion apparatus for burning fuel to generate thermal energy (combustion gas), a surface combustion burner 14 using a perforated plate 13 or a surface combustion burner using heat-resistant metal fibers (not shown) as shown in FIG. Etc.) are used.

  FIG. 7 shows a case where the heater and the smoke pipe are surrounded by an outer box. That is, an outer box 15 is installed to surround the heater 1 and the smoke pipe 7 that heat the fluid with heat energy, and the heated fluid is filled between the heater 1 and the smoke pipe 7 and the outer box 15, and The heating fluid plate gap is configured to communicate with the outer box 15. In this case, the fluid to be heated flows from the outside of the fluid heating device into the outer box 15 through the heated fluid supply pipe provided at the lower part of the outer box 15 and flows out from the upper part of the outer box 15. Is desirable.

  FIG. 8 shows an example of an apparatus provided with a gas-liquid separation chamber. That is, a gas-liquid separation chamber 21 having a gas-liquid separator 20 communicating with a fluid to be heated is provided on the upper portion of the outer box 15 surrounding the heater 1 and the smoke pipe 7. A steam outlet 22 is provided in any one of the upper portions, and the heated fluid is heated and boiled to generate steam. In the gas-liquid separation chamber 21, the steam is separated from the liquid fluid, and the steam flows out to the outside. The heating fluid is configured to flow out from the lower part of the gas-liquid separation chamber 21. Reference numeral 24 denotes a liquid fluid outlet.

  Further, as shown in FIG. 9, a liquid reservoir 26 having a liquid fluid outlet 25 is provided on either the inner side or the outer side of the lower part of the gas-liquid separation chamber 21, and a liquid level detector 27 is provided in the liquid reservoir 26. The liquid level detection unit 28 is configured, a flow control valve 29 for the liquid fluid inlet 30 is provided at the lower portion of the outer box 15, and the valve 29 and the liquid level detector 27 are connected to each other to connect the liquid level of the liquid reservoir 26. , And the flow rate of the liquid fluid flowing into the outer box 15 may be adjusted so that the liquid level is constant. 31 is a controller.

  In the above configuration, the fluid to be heated is an absorption liquid of an absorption chiller (including a cold / hot water machine), and the fluid heating device is a regenerator of the absorption chiller (including a cold / hot water machine). It is preferable.

  By using a combustion gas obtained by burning fuel with a burner as a heating fluid and using an absorption liquid as a heated fluid, an absorption chiller or an absorption chiller / heater (sometimes simply referred to as an absorption chiller) ) Can be used as a regenerator.

DESCRIPTION OF SYMBOLS 1 Heater 2 Heating part 3 Heated part 4 Plate 5 Combustion flame 7 Smoke tube 13 Porous plate 14 Surface combustion burner 20 Gas-liquid separator 21 Gas-liquid separation chamber 22 Steam outlet 24, 25 Liquid fluid outlet 26 Liquid pool 27 Liquid level detection 28 Liquid level detector 29 Flow control valve 30 Fluid inlet 31 Controller

Claims (12)

  In a fluid heating device comprising a combustion device that burns fuel to generate thermal energy and a heater that heats fluid with the thermal energy from the combustion device, the heater keeps a gap from a plate portion where the plates are stacked A fluid heating apparatus comprising a heating part and a heated part so that a fluid having heat energy and a heated fluid alternately flow through the gaps between these plates, and the heated fluid is heated. The apparatus is such that the fuel burns below the heater, heat energy enters the plate part from below and flows upward, and the fluid to be heated enters either below or next to the plate part and flows upward. And a plate portion of the heater is placed in a combustion flame, and a plurality of smoke tubes into which combustion gas after combustion flows is arranged behind the plate portion, and a cover is provided between the smoke tubes. Fluid heating apparatus is characterized in that as heat fluid flows.   The fluid heating apparatus according to claim 1, wherein a gap between the plates is different between the heated portion and the heated portion.   The fluid heating apparatus according to claim 2, wherein a gap between the plates in each heating unit is determined so that at least one of the combustion gas flow velocity and the combustion gas pressure loss is made to be uniform.   The fluid heating apparatus according to claim 2 or 3, wherein a gap between the plates of the heating part is larger than a gap between the plates of the heated part.   The fluid heating apparatus according to claim 1, wherein a gap between the plates of the heating unit becomes narrower as it goes downstream, and a heated part becomes wider as it goes downstream.   The fluid heating apparatus according to any one of claims 1 to 5, wherein the combustion apparatus that generates thermal energy by burning fuel is a surface combustion burner using a perforated plate.   The fluid heating apparatus according to any one of claims 1 to 5, wherein the combustion apparatus that generates thermal energy by burning fuel is a surface combustion burner using heat-resistant metal fibers.   An outer box is installed around the heater and the smoke pipe that heats the fluid with thermal energy, and the heated fluid is filled between the heater and the smoke pipe and the outer box, and the gap between the plates of the heated fluid is outside. The fluid heating apparatus according to claim 1, wherein the fluid heating apparatus is in communication with a box.   9. The fluid heating apparatus according to claim 8, wherein the fluid to be heated flows from the outside of the fluid heating apparatus into the outer box through a heated fluid supply pipe provided at the lower part of the outer box, and flows out from the upper part of the outer box. .   A gas-liquid separation chamber having a gas-liquid separator communicating with the fluid to be heated is provided on the upper portion of the outer box surrounding the heater and the smoke pipe, and a steam outlet is provided at either the upper portion or the upper portion of the gas-liquid separation chamber. The heated fluid is heated and boiled to generate steam, the vapor is separated from the liquid fluid in the gas-liquid separation chamber, the vapor flows out, and the heated fluid is discharged from the lower part of the gas-liquid separation chamber. The fluid heating device according to claim 8 or 9, wherein the fluid heating device flows out.   A liquid reservoir with a liquid fluid outlet is provided either on the inside or outside of the lower part of the gas-liquid separation chamber, and a liquid level detector is provided in the liquid reservoir to constitute a liquid level detection unit. A flow control valve is provided at the liquid fluid inlet, and this valve and the liquid level detector are connected to detect the liquid level in the liquid pool. The flow rate of liquid fluid flowing into the outer box so that the liquid level is constant The fluid heating device according to claim 10, wherein the fluid heating device is adjusted.   The fluid heating apparatus according to claim 1, wherein the fluid to be heated is an absorption liquid, and the fluid heating apparatus is a regenerator of an absorption refrigerator.

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