JP7568574B2 - Waterproof structure of regenerator - Google Patents

Description

The present invention relates to a waterproof structure for a regenerator.

There are conventional techniques for preventing the formation of condensation water. Patent Document 1 discloses a method for preventing corrosion caused by condensation water in the smoke chamber of a warm air heater. In Patent Document 1, a doughnut-shaped baffle is placed in the smoke chamber of the warm air heater, and the combustion gas flows not only through the hollow part of the baffle but also along the wall surface of the tube plate and the smoke chamber body, thereby increasing the temperature of the wall surface of the tube plate and the smoke chamber body and preventing condensation water from forming on the wall surface.

Japanese Patent Application Publication No. 6-42732

Here, in the case of absorption chillers and heaters, there is a problem in that condensation occurs inside the smoke tube of the regenerator. If the condensation adheres to the packing, it is likely to cause the packing to deteriorate. It is desirable to be able to protect the packing in the regenerator from condensation.

The object of the present invention is to provide a waterproof structure for a regenerator that can protect the packing from condensation water.

The waterproof structure of the regenerator of the present invention is characterized by comprising a regenerator having a housing having a first end face, a furnace tube having a combustion gas inlet opening on the first end face, and a smoke tube having a combustion gas outlet opening on the first end face, a smoke chamber having an opposing surface and attached to the regenerator with the opposing surface facing the first end face, which directs the combustion gas flowing out from the smoke tube outlet to the outside, a cylindrical partition wall attached to the inlet and protruding toward the opposing surface, which separates the combustion gas flow path toward the furnace tube from the smoke chamber, an annular packing that seals between the tip surface of the partition wall and the opposing surface, and a drip-proof member that covers the side surface of the base end of the partition wall and is fixed to the housing together with the partition wall, and directs condensation water that falls from the smoke tube outlet toward the side surface of the partition wall to the side of the partition wall.

The waterproof structure of the regenerator according to the present invention has a drip-proof member. The drip-proof member covers the side surface of the partition wall at the base end and is fixed to the housing together with the partition wall, and guides condensation water that falls from the outlet of the smoke tube toward the side surface of the partition wall to the side of the partition wall. The waterproof structure of the regenerator according to the present invention has the effect of protecting the packing arranged at the tip of the partition wall from condensation water.

FIG. 1 is an exploded perspective view of a waterproof structure for a regenerator according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of the waterproof structure of the regenerator according to the embodiment. FIG. 3 is a perspective view of the waterproof structure of the regenerator according to the embodiment. FIG. 4 is a cross-sectional view of the attachment structure of the drip-proof member according to the embodiment.

The waterproof structure of the regenerator according to the embodiment of the present invention will be described in detail below with reference to the drawings. Note that the present invention is not limited to this embodiment. Furthermore, the components in the following embodiment include those that a person skilled in the art would easily imagine or that are substantially the same.

[Embodiment]
An embodiment will be described with reference to Fig. 1 to Fig. 4. The embodiment relates to a waterproof structure for a regenerator. Fig. 1 is an exploded perspective view of the waterproof structure for a regenerator according to an embodiment, Fig. 2 is a cross-sectional view of the waterproof structure for a regenerator according to an embodiment, Fig. 3 is a perspective view of the waterproof structure for a regenerator according to an embodiment, and Fig. 4 is a cross-sectional view of an attachment structure for a drip-proof member according to an embodiment.

As shown in Figures 1 and 2, the waterproof structure 1 of the regenerator according to this embodiment includes a regenerator 2, a smoke chamber 3, a partition wall 4, a gasket 5, and a drip-proof member 6. The drip-proof member 6 of this embodiment guides condensation water flowing out from the smoke tube 22 to the side of the partition wall 4, and prevents the condensation water from flowing toward the gasket 5. Therefore, the waterproof structure 1 of the regenerator according to this embodiment can suppress deterioration of the gasket 5.

The schematic configuration of the entire device will be described with reference to FIG. 2. The regenerator 2 according to this embodiment is a high-temperature regenerator of an absorption-type hot and cold water machine, and performs heat exchange between the combustion gas and the solution. The solution used as the absorption solution is, for example, an aqueous lithium bromide solution. The regenerator 2 has a housing 20, a furnace tube 21, and multiple smoke tubes 22. The housing 20 is the main body of the regenerator 2, and houses the furnace tube 21 and the smoke tubes 22. The housing 20 is installed, for example, so that the axial direction X is perpendicular to the vertical direction Z.

The housing 20 has a first end surface 20a. The first end surface 20a is an end surface on one side of the housing 20 in the axial direction X. The illustrated first end surface 20a is perpendicular to the axial direction X. The furnace tube 21 is a passage that receives the combustion gas generated by the combustor 100. The tube portion 101 of the combustor 100 is inserted into the through hole of the partition wall 4. The combustion gas generated in the combustor 100 flows into the furnace tube 21 through the tube portion 101. The illustrated furnace tube 21 has a cylindrical shape. The furnace tube 21 has an inlet 21a that opens to the first end surface 20a. The furnace tube 21 extends from the first end surface 20a along the axial direction X to the innermost portion 20b of the housing 20. The combustion gas flows from the inlet 21a toward the innermost portion 21b as shown by the arrow AR1 in FIG. 1.

The smoke tube 22 is arranged radially outward from the furnace tube 21. The smoke tube 22 is formed in a cylindrical shape and has a smaller diameter than the furnace tube 21. The multiple smoke tubes 22 are arranged in a line in the circumferential direction so as to surround the furnace tube 21. The multiple smoke tubes 22 are arranged above and to the sides of the furnace tube 21. The smoke tube 22 has an outlet 22b that opens to the first end face 20a. The smoke tube 22 extends from the outlet 22b along the axial direction X to the inner part 20b of the housing 20. The multiple smoke tubes 22 are connected to the furnace tube 21 at the inner part 20b. The inner part 20b of the housing 20 has, for example, a smoke chamber that connects the furnace tube 21 and the multiple smoke tubes 22. The combustion gas that flows from the furnace tube 21 into the smoke tube 22 flows out from the outlet 22b as shown by the arrow AR2 in FIG. 1.

A container into which the dilute solution is introduced is provided around the furnace tube 21 and the smoke tube 22. The dilute solution introduced into the container from an absorber (not shown) is heated by the combustion gas flowing through the furnace tube 21 and the smoke tube 22. The heated and concentrated solution is sent to the absorber.

The smoke chamber 3 is a cover that covers the first end surface 20a. As shown in FIG. 2, the smoke chamber 3 has an opposing surface 31 that faces the first end surface 20a. The smoke chamber 3 is attached to the main body of the regenerator 2 with the opposing surface 31 facing the first end surface 20a. The smoke chamber 3 is fixed to the housing 20 by the mounting member 7. The smoke chamber 3 forms a space 32 between the first end surface 20a and the opposing surface 31 that guides the combustion gas. The combustion gas that flows out from the outlet 22b of the smoke tube 22 is discharged to the outside through the space 32.

The partition wall 4 is a member that assembles the housing 20, the smoke chamber 3, and the combustor 100 together. The partition wall 4 is attached to the inlet 21a. The partition wall 4 has a cylindrical portion 40, a flange portion 41, and a top wall 42. The cylindrical portion 40, the flange portion 41, and the top wall 42 are integrally formed. The cylindrical portion 40 has a tapered cylindrical shape. More specifically, the cylindrical portion 40 has a tapered shape in which the diameter decreases as it moves away from the housing 20 along the axial direction X. The shape of the cylindrical portion 40 corresponds to, for example, the difference between the diameter of the connection part on the combustor 100 side and the diameter of the connection part on the regenerator 2 side.

The flange portion 41 protrudes radially outward from the base end of the tubular portion 40. A through hole is formed in the flange portion 41 into which a fastening member is inserted. The top wall 42 extends radially inward from the tip of the tubular portion 40. The top wall 42 is formed in an annular shape and has a tip surface 42a.

The packing 5 is a member that seals between the smoke chamber 3 and the top wall 42. The illustrated packing 5 has a circular ring shape. As shown in FIG. 2, the packing 5 seals between the tip surface 42a of the partition wall 4 and the opposing surface 31 of the smoke chamber 3. The partition wall 4 separates the combustion gas flow path GR toward the furnace tube 21 from the smoke chamber 3. The packing 5 hermetically seals between the combustion gas flow path GR and the smoke chamber 3, suppressing leakage of the combustion gas.

The drip-proof member 6 is a member that guides condensation water to the side of the partition wall 4 so that the condensation water does not flow toward the packing 5. As shown in FIG. 2, the drip-proof member 6 covers the side surface 40a on the base end side of the partition wall 4. In other words, the drip-proof member 6 covers the vicinity of the flange portion 41 of the tubular portion 40 from the outside. The drip-proof member 6 is fixed to the inlet 21a together with the partition wall 4.

The drip-proof member 6 has a receiving portion 60 and a fixing portion 61. The receiving portion 60 is a portion that receives condensed water and guides the condensed water to the side of the partition wall 4. The receiving portion 60 protrudes from the flange portion 41 in the axial direction X. The tip of the receiving portion 60 is bent upward to prevent the condensed water from flowing toward the packing 5. The receiving portion 60 is arranged so as to intersect with an extension line of the first end face 20a in the vertical direction Z. The fixing portion 61 is erected from the receiving portion 60 toward the outside in the radial direction. In other words, the fixing portion 61 is erected toward a direction away from the side surface 40a of the partition wall 4.

Condensation occurs when the hot combustion gas is cooled in the smoke tube 22, causing the water vapor contained in the combustion gas to condense. A large amount of condensation occurs especially when operation begins first thing in the morning in winter, when the regenerator 2 is extremely cold. The condensation flows out from the outlet 22b of the smoke tube 22. As shown by the arrow AR3 in Figure 2, the condensation water that flows out flows down along the first end surface 20a toward the partition wall 4. If the drip-proof member 6 is not present, the condensation water may flow along the surface of the tube portion 40 and reach the packing 5. As a result, the condensation water may cause deterioration of the packing 5.

The waterproof structure 1 of the regenerator according to this embodiment uses a drip-proof member 6 to prevent condensation water from flowing toward the packing 5. As shown in FIG. 2, the receiving portion 60 of the drip-proof member 6 is disposed between the edge 20c of the opening formed in the housing 20 and the partition wall 4. Therefore, the receiving portion 60 can receive the condensation water that flows down along the first end surface 20a.

As shown in FIG. 3, the shape of the drip-proof member 6 corresponds to the shape of the flange portion 41 of the bulkhead 4. When viewed from the axial direction X, the shape of the drip-proof member 6 is an arc shape that corresponds to the flange portion 41. The drip-proof member 6 receives the condensation water that flows down from the outlet 22b of the smoke tube 22, and guides the condensation water to the side of the bulkhead 4 as shown by the arrow AR4. The guided condensation water flows downward of the bulkhead 4 without heading toward the packing 5.

The drip-proof member 6 is provided within a predetermined angle range from the upper end of the partition wall 4. This angle range is set so that condensed water cannot reach the packing 5. Therefore, the waterproof structure 1 of the regenerator according to this embodiment can appropriately suppress deterioration of the packing 5 due to condensed water.

The mounting structure of the drip-proof member 6 will be described with reference to FIG. 4. FIG. 4 is a cross-sectional view showing the mounting structure of the partition wall 4 and the drip-proof member 6 to the housing 20. The housing 20 has a fixing wall portion 23. A support member 24 that supports the partition wall 4 is disposed downstream of the wall portion 23 in the flow direction X1 of the combustion gas. The support member 24 and the flange portion 41 of the partition wall 4 face each other in the axial direction X with the wall portion 23 sandwiched therebetween. The fixing portion 61 of the drip-proof member 6 is disposed on the opposite side of the flange portion 41 from the wall portion 23.

A bolt 25 is fixed to the support member 24. The bolt 25 protrudes toward the partition wall 4 along the axial direction X. Through holes 41a, 61a corresponding to the bolt 25 are formed in the flange portion 41 and the fixing portion 61, respectively. The bolt 25 is inserted into the through holes 41a, 61a. The fixing portion 61, the flange portion 41, and the wall portion 23 are fastened together by a nut 26. In other words, the drip-proof member 6 is fixed by directly utilizing the fixing structure between the housing 20 and the partition wall 4. A seal member 27 is disposed between the support member 24 and the flange portion 41.

As shown in FIG. 4, the flange portion 41 of the partition wall 4 and the fixing portion 61 of the drip-proof member 6 are located downstream of the first end face 20a in the flow direction X1 of the combustion gas toward the furnace tube 21. Therefore, dripping condensation water is less likely to adhere to the flange portion 41. Even if condensation water gets into the gap between the fixing portion 61 and the flange portion 41, the amount is very small. Therefore, the condensation water that adheres to the partition wall 4 is evaporated by the high-temperature partition wall 4.

The drip-proof member 6 of this embodiment can be added directly to the existing bulkhead 4. In addition, because the drip-proof member 6 is attached to the bulkhead 4 by the bolts 25 and nuts 26, the drip-proof member 6 is less likely to deteriorate due to thermal deformation.

As described above, the waterproof structure 1 of the regenerator according to this embodiment includes the regenerator 2, the smoke chamber 3, the partition wall 4, the packing 5, and the drip-proof member 6. The regenerator 2 includes a housing 20 having a first end surface 20a, a furnace tube 21, and a smoke tube 22. The furnace tube 21 has a combustion gas inlet 21a that opens to the first end surface 20a. The smoke tube 22 has a combustion gas outlet 22b that opens to the first end surface 20a.

The smoke chamber 3 has an opposing surface 31 and is attached to the main body of the regenerator 2 with the opposing surface 31 facing the first end surface 20a. The smoke chamber 3 guides the combustion gas flowing out from the outlet 22b of the smoke tube 22 to the outside. The partition wall 4 is attached to the inlet 21a and protrudes toward the opposing surface 31. The partition wall 4 separates the flow path GR of the combustion gas toward the furnace tube 21 from the smoke chamber 3. The annular packing 5 seals between the tip surface 42a of the partition wall 4 and the opposing surface 31.

The drip-proof member 6 covers the side surface 40a of the partition wall 4 on the base end side, and is fixed to the housing 20 together with the partition wall 4. The drip-proof member 6 guides condensation water that falls from the outlet 22b of the smoke tube 22 toward the side surface 40a of the partition wall 4 to the side of the partition wall 4. Therefore, the waterproof structure 1 of the regenerator according to this embodiment can suppress deterioration of the packing 5 caused by condensation water adhering to the packing 5.

The drip-proof member 6 of this embodiment has a receiving portion 60 and a fixing portion 61. The receiving portion 60 is a portion that receives and guides condensed water. The fixing portion 61 is a portion that is fixed to the housing 20. The fixing portion 61 stands upright from the receiving portion 60 facing away from the side surface 40a of the partition wall 4. The fixing portion 61 is fixed so as to be located downstream of the first end face 20a in the flow direction X1 of the combustion gas toward the furnace tube 21. The drip-proof member 6 configured in this way can properly receive condensed water and protect the packing 5 from the condensed water.

[Modification of the embodiment]
The shape and arrangement of the drip-proof member 6 are not limited to those exemplified in the embodiment. For example, the shape of the drip-proof member 6 when viewed from the axial direction X is not limited to an arc shape. As an example, the drip-proof member 6 may extend in a straight line obliquely downward from the upper end of the partition wall 4.

The contents disclosed in the above embodiments and variations can be implemented in any suitable combination.

REFERENCE SIGNS LIST 1 waterproof structure of regenerator 2 regenerator 3 smoke chamber 4 bulkhead 5 packing 6 drip-proof member 7 mounting member 20: main body, 20a: first end face, 20b: inner part, 20c: edge part 21: furnace tube, 21a: inlet, 22: smoke tube, 22b: outlet 23: wall part, 24: support member, 24a: through hole 25: bolt, 26: nut 31: opposing surface, 32: space part 40: tubular part, 41: flange part, 41a: through hole 42: top wall, 42a: tip surface 60: receiving part, 61: fixing part, 61a: through hole 100: combustor, 101: tubular part X: axial direction, X1: exhaust gas flow direction, Z: vertical direction

Claims (2)

a regenerator including a housing having a first end surface, a furnace tube having a combustion gas inlet opening at the first end surface, and a smoke tube having a combustion gas outlet opening at the first end surface;
a smoke chamber having an opposing surface, the opposing surface being attached to the regenerator with the opposing surface facing the first end surface, the smoke chamber directing the combustion gas flowing out from an outlet of the smoke tube to the outside;
a cylindrical partition wall attached to the inlet and protruding toward the opposing surface, separating the combustion gas flow path toward the flue gas tube from the smoke chamber;
an annular packing that seals between the tip surface of the partition wall and the opposing surface;
A drip-proof member that covers the side surface of the partition wall at the base end side and is fixed to the housing together with the partition wall, and directs condensation water that falls from the outlet of the smoke tube toward the side surface of the partition wall to the side of the partition wall;
A waterproof structure for a regenerator comprising: The drip-proof member is
A receiving portion that receives the condensation water and guides the condensation water;
a fixing portion that stands from the receiving portion in a direction away from the side surface of the partition wall and is fixed to the housing;
having
The waterproof structure for a regenerator according to claim 1 , wherein the fixing portion is fixed so as to be located downstream of the first end surface in a flow direction of the combustion gas toward the furnace tube.

Images