JP5457145B2 - Fluid heating device - Google Patents

Description

  The present invention relates to an apparatus that burns fuel and heats a fluid such as a liquid by combustion gas, and more specifically, a part of a plate that is laminated to flow a fluid having heat energy and a fluid to be heated alternately. The present invention relates to an apparatus applied to all the heating units, and more particularly to a fluid heating apparatus in which a combustion flame is flowed horizontally and then bent upward.

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 order to perform the optimum design of the fluid heating device, the present invention provides at least a part (part or all) of a heater that heats a fluid with thermal energy from combustion, and a plate portion (plate) in which plates are stacked at intervals. The most important feature is that the combustion flame is flowed horizontally and then bent upward to flow.

  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 at least a part of the heater. (Part or all) consists of plate parts that are stacked with a gap, and the fluid that has heat energy and the fluid to be heated flow through the gap between these plates so that the fluid to be heated is heated. A fluid heating apparatus comprising a heating part and a heated part, wherein the plate part is arranged at two places, a lower plate part placed in the combustion flame and an upper plate part placed after the combustion flame, After flowing horizontally through the plate portion, it bends upward and flows upward through the upper plate portion, and the fluid to be heated flows upward through the lower plate portion, It is characterized in that it has to flow to the upper enters from parts.

  In this arrangement, the plate stack in the lower plate portion placed in the combustion flame may be sparser than the plate stack in the upper plate portion placed after the combustion flame.

  Moreover, in these apparatuses, instead of the lower plate portion placed in the combustion flame, either a goblet-shaped or staggered circular tube group may be arranged. Moreover, it may be set as the structure which has arrange | positioned the deformed pipe group comprised by the deformed pipe instead of the lower plate part set | placed in a combustion flame. In this case, it is preferable that the deformed tube group is a tube group composed of either an elliptical tube or a flat tube.

  In these apparatuses, the gap between the plates may be different between the heated part and the heated part. In some cases, the plate gap of the heating unit placed in the combustion flame is determined so that at least one of the combustion gas flow velocity and the pressure loss is made closer to each other. Furthermore, the gap between the plates of the heating part may be larger than the gap between the plates of the heated part.

  In these devices, the upper plate portion placed after the combustion flame may be divided into a plurality of plate groups along the flow of thermal energy. In this case, the plurality of plate groups may be configured so that the stack of the plate groups becomes denser toward the downstream. Further, 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. In this case, the heating part and the heated part may be placed in the combustion flame, or the heating part and the heated part may be placed after the combustion flame.

  In these devices, the combustion device that generates heat energy by burning the fuel is configured to be a surface combustion burner using a perforated plate, or the combustion device that generates heat energy by burning the fuel is heat resistant. It is comprised so that it may be a surface combustion burner using a metal fiber.

  Also, in these devices, an outer box is installed surrounding a lower plate portion and an upper plate portion made of a heater that heats fluid with heat energy, and a fluid to be heated is filled between the heater and the outer box. In addition, the gap between the plates of the heated fluid communicates with the outer box, and the heated fluid can flow outside the upper plate portion placed after the combustion flame. In this case, the fluid to be heated flows from the outside of the fluid heating device through the fluid to be heated supply pipe provided in either the upper part or 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 heated portion is provided on the side of the upper portion of the heated portion of the upper plate portion placed after the combustion flame. A steam outlet is provided in one of the upper parts, the heated fluid is heated and boiled to generate steam, and the steam and liquid flow into the gas-liquid separation chamber from the upper plate part placed after the combustion flame, The vapor is separated from the liquid fluid by the separator, the vapor flows out to the outside, and the liquid can flow out from the lower part of the gas-liquid separation chamber.

  In this apparatus, a liquid reservoir having 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 of the heating fluid supply pipe, and this valve and the liquid level detector are connected to detect the liquid level of the fluid flowing out either inside or outside the heated part. And it can be set as the structure which adjusted the fluid flow volume which flows in into a to-be-heated part so that this liquid level may become fixed.

  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.

  The fluid heating device of the present invention has a simple structure because all or part of the conventional water pipe portion is plate-type so that the combustion gas flow path can be freely set and only the plate portion is set. Therefore, manufacturing is easy and cost reduction can be achieved. 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 in FIG. FIG. 3 is an explanatory view showing another example of the plate portion in FIG. FIG. 4 is an explanatory view in the case of using a goblet-shaped or staggered circular tube group instead of the front plate portion. FIG. 5 is an explanatory view when a deformed tube group composed of deformed tubes is used instead of the front plate portion. FIG. 6 is an explanatory diagram illustrating an example of a heating unit and a heated portion. FIG. 7 is an explanatory view showing another example of the heating part and the heated part. FIG. 8 is an explanatory view showing an example in which a plate portion placed after the combustion flame is divided. FIG. 9 is an explanatory view showing still another example of the heating part and the heated part. FIG. 10 is an explanatory view showing an example of a combustion apparatus. FIG. 11 is an explanatory view showing an example of the fluid heating apparatus of the present invention. 12 is a cross-sectional explanatory view of the fluid heating apparatus shown in FIG. FIG. 13 is an explanatory view showing another example of the fluid heating apparatus of the present invention. FIG. 14 is an explanatory cross-sectional view of the fluid heating apparatus shown in FIG. FIG. 15 is an explanatory view showing another example of the fluid heating apparatus of the present invention. FIG. 16 is an explanatory view showing still another example of the fluid heating apparatus of the present invention.

  The object of designing the fluid heating device in a compact and inexpensive manner has been realized by using part or all of the heater for heating the fluid as a plate laminate.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 16. However, the present invention is not limited to the following embodiments, 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 heater 1.

  The whole or a part of the heater 1 is composed of a plate portion in which plates 4 are laminated 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. The fluid to be heated is configured to be heated. In FIG. 1, fuel is burned in a horizontal direction in a combustion apparatus (not shown), and the generated combustion gas enters the plate portion 1 horizontally, and the fluid to be heated enters from below and flows upward. That is, the flow of the combustion gas and the flow of the fluid to be heated are orthogonal.

  Further, as shown in FIG. 2, the plate portion is divided into two parts, a lower plate portion 6 placed in the combustion flame 5 and an upper plate portion 7 placed after the combustion flame, and the combustion flame 5 is divided into the lower plate portion. After flowing horizontally through the portion 6, it bends upward and flows upward through the upper plate portion 7. On the other hand, the heated fluid flows through the lower plate portion 6 and then enters from the lower portion of the upper plate portion 7 and flows upward. Further, as shown in FIG. 3, the front lower plate portion 6 may be sparse and the rear upper plate portion 7 may be dense.

  FIG. 4 shows an example in which a goblet-shaped or staggered circular tube group 8 is arranged instead of the plate portion placed in the combustion flame 5. FIG. 5 shows an example in which a deformed tube group 9 made of an elliptical tube or a flat tube is arranged instead of the circular tube group.

FIG. 6 shows a case where the gap of the plate 4 is made different between the heating unit 2 and the heated part 3, for example, the gap of the heating part 2 is made wider than the gap of the heated part 3.
Further, as shown in FIG. 7, the plate gap of the heating unit placed during and / or after the combustion flame is determined so that the combustion gas flow velocity or the combustion gas pressure is substantially uniform.

  FIG. 8 shows a case where the plate portion placed after the combustion flame is divided into a plurality of plate groups, for example, three plate groups 10, 11, 12 along the flow of thermal energy (combustion gas). Yes. In this case, it is preferable that the stacks of the plates 10, 11, and 12 are stacked so as to become denser toward the downstream (upward).

  FIG. 9 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. In this case, the heating part 2 and the heated part 3 are placed during or after the combustion flame.

  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.

11 and 12 show a case where the heater is surrounded by an outer box. That is, an outer box 15 is installed to surround the lower plate portion 6 and the upper plate portion 7, which are heaters that heat a fluid with heat energy, and the fluid to be heated is filled between these heaters and the outer box 15. In addition, the gap between the heated fluid plates communicates with the outer box 15 so that the heated fluid flows outside the upper plate portion 7 placed after the combustion flame.
In this case, as shown in FIGS. 13 and 14, the heated fluid flows from the outside of the fluid heating device through heated fluid supply pipes 16 and 17 provided at either the upper part or the lower part of the outer box 15. It is preferable that the outer casing 15 flows out from the upper part.

  FIG. 15 shows an example of a heater provided with a gas-liquid separation chamber. That is, a gas-liquid separation chamber 21 provided with a gas-liquid separator 20 communicating with the heated portion is provided on the side of the upper portion of the heated portion of the upper plate portion 7 placed after the combustion flame. A steam outlet 22 is provided on either the upper part or the upper part of the gas 21, the heated fluid is heated and boiled to generate steam, and the steam and liquid are separated from the gas-liquid separation chamber by the upper plate portion 7 placed after the combustion flame. The vapor is separated from the liquid fluid by the gas-liquid separator 20, the vapor flows out to the outside, and the liquid flows out from the lower part of the gas-liquid separation chamber 21.

  Further, as shown in FIG. 16, a liquid reservoir 24 having a liquid fluid outlet 23 is provided either on the inside or outside of the lower part of the gas-liquid separation chamber 21, and a liquid level detector 25 is provided in the liquid reservoir 24. The liquid level detection unit 26 is configured, and a flow rate control valve 28 is provided at the liquid fluid inlet 27 of the heated fluid supply pipe 17. The valve 28 and the liquid level detector 25 are connected to each other, and In some cases, the liquid level of the fluid flowing out to either the inside or the outside is detected, and the flow rate of the fluid flowing into the heated portion is adjusted so that the liquid level is constant. 29 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 6 Lower plate part 7 Upper plate part 8 Circular pipe group 9 Different diameter pipe group 10, 11, 12 Plate group 13 Porous plate 14 Surface combustion burner 15 Outer box 16 , 17 Heated fluid supply pipe 20 Gas-liquid separator 21 Gas-liquid separation chamber 22 Steam outlet 23 Liquid fluid outlet 24 Liquid pool 25 Liquid level detector 26 Liquid level detector 27 Liquid fluid inlet 28 Flow control valve 29 at the liquid fluid inlet Controller

Claims (20)

In 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, plates are stacked with at least a portion of the heater maintaining a gap In this fluid heating apparatus, a fluid having heat energy and a fluid to be heated flow alternately through the gaps between these plates, and the heating portion and the heated portion are configured so that the fluid to be heated is heated. The plate portion is arranged in two places, a lower plate portion placed in the combustion flame and an upper plate portion placed after the combustion flame, and the combustion flame flows horizontally through the lower plate portion and then bends upward. It flows over the plate portion upwards, after the heated fluid flowing through the lower plate portion upwards, to flow in from the bottom of the upper plate portion to the upper, combustion fire Fluid heating device stack of plates in the lower plate portion, characterized in that as a sparse than stack of plates in upper plate portion to be placed after the combustion flame is placed in. Instead of the lower plate portion placed in the combustion flame, fluid heating apparatus according to claim 1 wherein placing the grid pattern and staggered either circular tube group. Instead of the lower plate portion placed in the combustion flame, fluid heating apparatus according to claim 1 wherein placing the deformed tube group composed of a profiled tube. The fluid heating device according to claim 3, wherein the deformed tube group is a tube group composed of either an elliptical tube or a flat tube. The fluid heating apparatus according to any one of claims 1 to 4 , wherein a gap between the plates is different between the heating part and the heated part. 6. The fluid heating apparatus according to claim 5, wherein the plate gap of the heating unit placed in the combustion flame is determined so that at least one of the combustion gas flow velocity and the pressure loss is made closer to each other. 6. The fluid heating apparatus according to claim 5, wherein the plate gap of the heating unit placed after the combustion flame is determined so that at least one of the combustion gas flow velocity and the pressure loss is made to approach uniformly. 6. The fluid heating apparatus according to claim 5, 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 device according to any one of claims 1 to 8 , wherein an upper plate portion placed after the combustion flame is divided into a plurality of plate groups along a flow of thermal energy. The fluid heating device according to claim 9 , wherein in the plurality of plate groups, the stack of the plate groups becomes denser toward the downstream. Narrowing as the gap between the plates of the heating portion toward the downstream direction, the fluid heating apparatus according to claim 1 wherein the wider as the heated portion is toward the downstream direction. The fluid heating apparatus according to claim 11, wherein the heating part and the heated part are placed in a combustion flame. The fluid heating apparatus according to claim 11, wherein the heating part and the heated part are placed after the combustion flame. The fluid heating device according to any one of claims 1 to 13 , wherein the combustion device that generates thermal energy by burning fuel is a surface combustion burner using a perforated plate. The fluid heating device according to any one of claims 1 to 13 , wherein the combustion device that generates heat energy by burning fuel is a surface combustion burner using heat-resistant metal fibers. An outer box is installed so as to surround the lower plate portion and the upper plate portion made of a heater that heats the fluid with heat energy, and the heated fluid is filled between the heater and the outer box, and the heated fluid of which the gap of the plate communicates with the outer box, the fluid heating apparatus according to any one of claims 1 to 15 as the heated fluid flows outside of the upper plate portion to be placed after the combustion flame. 17. The fluid according to claim 16 , wherein the fluid to be heated flows in from the outside of the fluid heating device via a fluid to be heated supply pipe provided at either the upper part or the lower part of the outer box and flows out from the upper part of the outer box. Heating device. A gas-liquid separation chamber having a gas-liquid separator communicating with the heated portion is provided on the side of the upper portion of the heated portion of the upper plate portion placed after the combustion flame, and the upper and upper portions of the gas-liquid separation chamber A steam outlet is provided in any of the above, the heated fluid is heated and boiled to generate steam, and the steam and liquid flow into the gas-liquid separation chamber from the upper plate portion placed after the combustion flame, and the gas-liquid separator The fluid heating apparatus according to claim 16 or 17 , wherein the steam is separated from the liquid fluid and the steam flows out to the outside, and the liquid flows out from the lower part of the gas-liquid separation chamber. A liquid reservoir having 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 detector, and a heated fluid supply pipe A flow control valve is provided at the liquid fluid inlet of the liquid, and the valve and the liquid level detector are connected to detect the liquid level of the fluid flowing out either inside or outside the lower part of the heated portion. 19. The fluid heating apparatus according to claim 18 , wherein the flow rate of the fluid flowing into the heated portion is adjusted so that the surface is constant. The fluid heating device according to any one of claims 1 to 19 , wherein the fluid to be heated is an absorbing liquid, and the fluid heating device is a regenerator of an absorption chiller.

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