JP5575438B2 - 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 a fluid heating apparatus applied to all heating units.

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 it is a laminate.

  The fluid heating device of the present invention is 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. Part or all (at least a part) consists of plate parts in which plates are stacked while maintaining a gap. A fluid having heat energy and a heated fluid alternately flow through the gaps of these plates so that the heated fluid is heated. It is characterized by comprising a heating part and a heated part.

  In this apparatus, the combustion apparatus is configured such that fuel burns in the horizontal direction, heat energy enters the plate portion horizontally, and the fluid to be heated enters from below and flows upward. Moreover, in these apparatuses, the plate portion is divided and arranged at two locations, a plate portion placed in the combustion flame and a plate portion placed after the combustion flame.

  Further, in the plate portion of this apparatus, the plate portion placed in the combustion flame may have a sparse plate gap than the plate portion placed after the combustion flame. Further, instead of the plate portion placed in the combustion flame, there may be a configuration in which a group of goblet or staggered tubes is 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 plate part set | placed in a combustion flame.

  In this apparatus, the deformed tube group is preferably a tube group formed of an elliptical tube or a flat tube. In some cases, the gap between the plates is different between the heated portion and the heated portion. In this apparatus, it is preferable that the plate gap of the heating unit placed in the combustion flame is determined so that the combustion gas flow velocity or pressure loss is made closer to uniform. Moreover, it is preferable that the plate gap of the heating unit placed after the combustion flame is determined so that the combustion gas flow velocity or pressure loss is made close to uniform. Moreover, it is preferable that the gap between the plates of the heating unit is larger than the gap between the plates of the heated portion.

  In these apparatuses, the 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, it is preferable to configure the plurality of plate groups so that the stack of the plate groups becomes denser toward the downstream.

  Moreover, it is good also as a structure which the space | interval between the plates of a heating part becomes narrow as it goes downstream, and becomes wide as the to-be-heated part goes downstream. In this case, the heating part and the heated part may be placed in the combustion flame, and 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 may be configured to be a surface combustion burner using metal fibers.

  In these apparatuses, an outer box is installed so as to surround a heater that heats fluid with thermal energy, and a heated fluid is filled between the heater and the outer box, and a gap between plates of the heated fluid is provided. It is configured to communicate with the outer box. In this apparatus, it is preferable that the fluid to be heated flows in from the upper part or the lower part of the outer box from the outside of the fluid heating apparatus and flows out from the upper part of the outer box.

  In these devices, a gas-liquid separation chamber provided with a gas-liquid separator communicating with the heated portion is provided above the heated portion, and a vapor outlet is provided above or above the gas-liquid separation chamber. In some cases, the fluid to be heated is heated and boiled to generate steam, and the liquid is separated from the liquid fluid in the gas-liquid separation chamber so that the steam flows out to the outside.

  In addition, a gas-liquid separation chamber is connected to the upper side of the heated portion via a communication pipe, a vapor outlet is provided at the upper part or upper part of the gas-liquid separation chamber, and a liquid fluid outlet is provided at the lower part of the gas-liquid separation chamber The heated fluid is heated to generate steam, and the generated steam flows into the gas-liquid separation chamber through the communication pipe together with the liquid fluid, and is separated from the liquid fluid by the gas-liquid separator. In some cases, the liquid fluid flows out and is discharged from the liquid fluid outlet.

  Further, in this apparatus, a liquid reservoir having a liquid fluid outlet is provided inside or outside 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 at the liquid fluid inlet is provided in the part, and this valve and the liquid level detector are connected to detect the liquid level of the fluid flowing out inside or outside the lower part of the heated part, and the liquid level is constant. In some cases, the flow rate of the fluid flowing into the heated portion is adjusted so as to be.

  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. Figure 5 is a diagram for describing a case of using different-section tube group including a different form tube instead of plate section of the front. 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. FIG. 12 is an explanatory view showing another example of the fluid heating apparatus of the present invention. FIG. 13 is an explanatory view showing an example of a main part of the fluid heating apparatus of the present invention. FIG. 14 is an explanatory view showing another example of the main part of the fluid heating apparatus of the present invention. FIG. 15 is an explanatory view showing still another example of the main part 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 15, but 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 horizontally, and the heated fluid 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.

As shown in FIG. 2, the plate portion may be divided and arranged in a plate portion 6 placed in the combustion flame 5 and a plate portion 7 placed after the combustion flame.
Further, as shown in FIG. 3, the front plate portion 6 may be sparse and the rear 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.

FIGS. 6 and 7 show a case where the gap between the plates 4 is different between the heating unit 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.
Further, 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, 12 are stacked so as to become denser toward the downstream.

FIG. 9 shows a case where the gap between the plates of the heating unit 2 becomes narrower as it goes downstream, and the gap between the plates of the heated part 3 becomes wider as it goes downstream of the heating unit 2. ing. 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.

  FIG. 11 shows a case where the heater is surrounded by an outer box. That is, an outer box 15 is installed surrounding the heater 1 to heat the fluid with thermal energy, and the heated fluid is filled between the heater 1 and the outer box 15. The plate gap communicates with the outer box 15. In this case, as shown in FIG. 12, it is preferable that the fluid to be heated flows in from the upper part or the lower part of the outer box 15 from the outside and flows out from the upper part of the outer box 15.

  FIG. 13 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 3 is provided above the heated portion 3, and a steam outlet 22 is provided above or above the gas-liquid separation chamber 21. The fluid to be heated is heated and boiled to generate steam, and the steam is separated from the liquid fluid in the gas-liquid separation chamber 21 so that the steam flows out to the outside.

  Further, as shown in FIG. 14, a gas-liquid separation chamber 21 having a gas-liquid separator 20 is connected to the upper side of the heated portion 3 via a communication pipe 23, and the upper or upper side of the gas-liquid separation chamber 21. A vapor outlet 22 is provided in the part, and a liquid fluid outlet 24 is provided in the lower part of the gas-liquid separation chamber 21 so that the fluid to be heated is heated to generate steam, and the generated steam passes through the communication pipe 23 together with the liquid fluid. In some cases, the gas and liquid separation chamber 21 flows into the gas-liquid separation chamber 21 and is separated from the liquid fluid by the gas-liquid separator 20 so that the vapor flows out to the outside, and the liquid fluid is discharged from the liquid fluid outlet 24.

  Further, as shown in FIG. 15, a liquid reservoir 26 having a liquid fluid outlet 25 is provided inside or outside a lower part of a gas-liquid separation chamber 21 having a gas-liquid separator 20. A detector 27 is provided to form a liquid level detector 28, a liquid fluid inlet flow control valve 29 is provided in the heated portion 3, and the valve 29 and the liquid level detector 27 are connected to provide a heated portion. 3 may be configured to detect the liquid level of the fluid flowing out to the inside or outside of the lower part of 3 and adjust the flow rate of the fluid flowing into the heated portion 3 so that the liquid level is constant. 30 is a liquid fluid inlet, and 31 is a controller.

  In the above configuration, the fluid to be heated is an absorption liquid of an absorption chiller (or a cold / hot water machine), and the fluid heating device is a regenerator of the absorption chiller (or a cold / hot water machine). 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, 7 Plate part 8 Circular pipe group 9 Deformed pipe group 10, 11, 12 Plate group 13 Porous plate 14 Surface combustion burner 15 Outer box 20 Gas-liquid separator DESCRIPTION OF SYMBOLS 21 Gas-liquid separation chamber 22 Steam outlet 23 Communication pipe 24, 25 Liquid fluid outlet 26 Liquid pool 27 Liquid level detector 28 Liquid level detector 29 Liquid fluid inlet flow control valve 30 Liquid fluid inlet 31 Controller

Claims (19)

Fluid that is a regenerator of an absorption chiller or a chiller / heater comprising a combustion device that burns fuel to generate thermal energy and a heater that heats the absorbing fluid that is the fluid to be heated with the thermal energy from the combustion device A heating device, wherein a part or all of the heater comprises a plate portion in which plates are stacked while maintaining a gap. A fluid having heat energy and a fluid to be heated flow through the gaps between these plates alternately, The heating unit and the heated part are configured so that the fluid is heated. In the combustion device, the fuel burns in the horizontal direction, the heat energy enters the plate part horizontally, and the heated fluid enters from below. It is configured to flow upward, the fluid pressure of said plate portion, characterized in that disposed divided into two portions of the plate portion to be placed after the plate portion and the combustion flame is placed in the combustion flame Apparatus. In the plate portion, the fluid heating apparatus according to claim 1, wherein the plate portion is placed in the combustion flame is so sparse than the plate portion to be placed after the combustion flame. Instead of the plate portion to be placed in the combustion flame, fluid heating apparatus according to claim 1 wherein placing the tessellated or staggered Tube Bundle. Instead of the plate portion to be 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 apparatus according to claim 4, wherein the deformed tube group is a tube group formed of an elliptic tube or a flat tube. The fluid heating apparatus according to claim 1 or 2, wherein a gap between the plates is different between the heated portion and the heated portion. The fluid heating apparatus according to claim 6, wherein the plate gap of the heating unit placed in the combustion flame is determined so that the combustion gas flow velocity or pressure loss is made closer to uniform. The fluid heating apparatus according to claim 6, wherein the plate gap of the heating unit placed after the combustion flame is determined so that the combustion gas flow velocity or pressure loss is made closer to uniform. The fluid heating apparatus according to claim 6, 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 9 , wherein a 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 10 , wherein in the plurality of plate groups, the stack of the plate groups becomes denser toward the downstream. The fluid heating apparatus according to claim 1 or 2, wherein a gap between the plates of the heating unit is narrowed in a downstream direction, and a heated portion is widened in a downstream direction of the heating unit. The fluid heating apparatus according to claim 12, wherein the heating part and the heated part are placed in a combustion flame. The fluid heating apparatus according to claim 12, 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 14 , wherein the combustion device 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 14 , 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 that heats the fluid with thermal energy, and the heated fluid is filled between the heater and the outer box, and the gap between the heated fluid plates communicates with the outer box. The fluid heating apparatus according to any one of claims 1 to 16 . 18. The fluid heating apparatus according to claim 17 , wherein the fluid to be heated flows in from an upper part or a lower part of the outer box from the outside of the fluid heating apparatus and flows out from an upper part of the outer box. A gas-liquid separation chamber provided with a gas-liquid separator that communicates with the heated portion is provided above the heated portion, and a steam outlet is provided at the upper or upper portion of the gas-liquid separating chamber, and the heated fluid is The fluid heating device according to any one of claims 1 to 18 , wherein the fluid 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 .

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