KR100717608B1 - Heat exchanger having spiral way - Google Patents

Abstract

The present invention relates to a wastewater heat exchanger having a spiral flow path, wherein the spiral flow path is formed to smoothly guide the flow of waste water or wastewater introduced therein and to reduce the variation in the flow velocity in the flow path to prevent precipitation of suspended solids. A flow path plate having open and closed holes formed at both ends of the spiral flow path, respectively; A heat transfer plate partitioning the flow path plates when the flow path plates are stacked in the forward and reverse directions, and communicating holes selectively perforated in correspondence with the open and closed holes to flow the flow water plates in which the water and waste water are stacked in the multi-layer structure; And a fastening member screwed onto the upper plate and the lower plate, and the upper plate and the lower plate assembling hole perforated on the outer circumferential surface thereof so as to maintain the lamination state while placing the multi-layered flow path plate and the heat transfer plate inside thereof. It is characterized by. According to the above configuration, the flow of fluid is smoothly induced by the helical flow passage, thereby preventing the precipitation of suspended solids and the like on the flow passage, and the flow passage plate in the waste heat exchanger in a state where the wastewater and the time are separated from each other. By passing through the furnace, the heat exchange rate between the wastewater and the time and time can be increased, and a partition wall for forming a spiral flow path is formed in the flow path plate, thereby preventing the deflection phenomenon of the flow path plate even when the multi-layer loading.

Spiral flow path, waste water heat exchanger, float sedimentation prevention, flow path plate

Description

Wastewater Heat Exchanger with Spiral Channel {HEAT EXCHANGER HAVING SPIRAL WAY}

1 is a perspective view of a wastewater heat exchanger having a spiral flow path according to the present invention,

Figure 2 is a detailed view showing the structure of one layer applied to the present invention,

3 is a bottom assembly view of the wastewater heat exchanger having a spiral flow path according to the present invention,

4 is an interrupted assembly view of a wastewater heat exchanger having a spiral flow path in accordance with the present invention;

5 is a top assembly view of a wastewater heat exchanger having a spiral flow path in accordance with the present invention.

* Explanation of symbols for main parts of drawings *

10: Top 11: Sewage Outflow Hall

12: wastewater inlet pipe 13,23: assemblyman

14: fastening member 15: inner assembly hole

16: inner fastening member 20: lower plate

21: Municipal water inlet pipe 22: Wastewater outlet pipe

23: Assemblyman 30: Europan

31: the first through 32

33: third hole 34: fourth hole

35: Euro 36: engaging projection

37: coupling groove 38: partition wall

39: packing groove 41: flange

43: inner fastening hole 50: heat transfer plate

60: rubber packing

The present invention relates to a wastewater heat exchanger having a spiral flow passage. More particularly, the spiral flow passage is formed in a spiral shape, and thus, the flow of the fluid is smooth, the heat transfer effect is excellent, and the expansion and maintenance are extremely easy. A wastewater heat exchanger having a flow path.

In general, wastewater heat exchangers for recovering heat from wastewater are provided in industrial facilities that require hot water, such as farms, fish farms, and public baths.

For example, a conventional wastewater heat exchanger is installed between a plurality of flow plates having inlet pipes and outlet pipes at both ends to allow the inflow of wastewater or time water, and a flow plate for partitioning flow paths of waste water and time water, and flows into both ends thereof. A heat transfer plate having a through hole communicating with the pipe or the outlet pipe is provided.

According to the above configuration, the waste water and the time water flow through each fluidized plate partitioned by the heat transfer plate, and at this time, waste heat can be recovered by heat conduction through the heat transfer plate.

However, the conventional wastewater heat exchanger has the following problems.

First, in order to increase the heat exchange rate between the waste water and the time water, it is preferable to manufacture a multilayer, but the conventional fluidized plate has an empty space inside, so that only the outer circumferential surface of the heat transfer plate is supported by the fluidized plate. As a result, the flow of fluid was not desired.

In addition, since the conventional fluidized plate is formed in a rectangular plate shape and has an inlet and an outlet formed at both ends, the wastewater introduced into the fluidized plate through the inlet pipe flows temporarily expanded and then exits through the narrow outlet pipe again. The bottleneck occurs and the suspended solids accumulate on the inner edge of the fluidized plate.

Moreover, due to the difference in flow velocity in the fluidized plate, the thermal conductivity between the wastewater, the heat transfer plate, the heat transfer plate and the time decreases.

As a result, there was a lot of difficulties in the maintenance, such as the fluid flow is not smooth as a whole, the thermal efficiency and treatment capacity is reduced, and the maintenance work to remove the foreign matter in the flow plate or to improve the deflection of the heat transfer plate.

The present invention has been made to solve the above-mentioned problems, the object of which is to form a spiral flow path in a circular flow path plate to smoothly induce the flow of the fluid while eliminating the flow rate deviation in the flow path plate waste water, heat transfer plate, heat transfer plate and The present invention provides a wastewater heat exchanger having a spiral flow path that can maximize thermal efficiency and treatment capacity by increasing thermal conductivity between hours.

Another object of the present invention is to form a spiral flow path in a circular flow path plate to smoothly induce the flow of fluid to prevent the accumulation of suspended matter in the flow path plate, and to maintain the deflection phenomenon of the heat transfer plate by the spiral flow path partition wall. The present invention provides a wastewater heat exchanger having a spiral flow path that is extremely easy to repair.

It is still another object of the present invention to provide a wastewater heat exchanger having a spiral flow path which can further improve the thermal conductivity between wastewater and time by stacking flow path plates so that fluid flows in a clockwise and counterclockwise direction.

The present invention, in order to achieve the above-described technical problem, in the wastewater heat exchanger in which the heat and waste water flows through the partitioned flow path to the diaphragm structure, which induces a smooth flow of the water or wastewater introduced into the wastewater heat exchanger. On the other hand, a spiral flow path is formed to reduce the flow rate variation in the flow path to prevent the sedimentation of suspended matter, and the flow path plate having open and closed holes formed at both ends of the spiral flow path and the flow path plate in the forward and reverse directions, respectively. The plate is partitioned separately, and the heat transfer plate is formed with a communication hole selectively perforated in correspondence with the open and closed holes so that the flow water and waste water flows in a multi-layer structure. Top and bottom plates with assembly holes perforated on the outer circumferential surface to keep the stacking state firmly positioned, And it is characterized in that the fastening member is screwed on the upper plate and the lower plate assembly hole.

In addition, the flow path plate is a substantially circular plate and a spiral flow path is converged to the center thereof by the partition wall, and a packing groove into which the rubber packing is fitted is formed on the partition wall to maintain the airtightness when laminating with the heat transfer plate. It characterized in that the coupling projection and the coupling groove is provided on one side and the other side of the partition wall to maintain the mutual coupling state.

In addition, the flow path plate is characterized in that the flange is formed on the outer circumferential surface, the fastening hole corresponding to the assembling hole perforated in the upper plate and the lower plate on the flange, and is integrally assembled with the upper plate and the lower plate by the fastening member.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the wastewater heat exchanger having a spiral flow path according to the present invention.

1 is a perspective view of a wastewater heat exchanger having a spiral flow path according to the present invention, FIG. 2 is a detailed view showing a structure of one layer applied to the present invention, and FIG. 3 is a bottom assembly of the wastewater heat exchanger having a spiral flow path according to the present invention. 4 is an interrupted assembly view of a wastewater heat exchanger having a helical flow path in accordance with the present invention, and FIG. 5 is a top assembly view of a wastewater heat exchanger having a helical flow path in accordance with the present invention.

First, as shown in FIG. 1, a wastewater heat exchanger having a spiral flow path according to the present invention includes an upper plate 10 and a lower plate 20, and includes a plurality of passage plates between the upper plate 10 and the lower plate 20. 30) and the heat transfer plate 50 are laminated.

In addition, the upper plate 10 is provided with a wastewater inflow pipe 12 into which wastewater flows in and a wastewater inflow pipe 11 through which time water flows out, and a lower surface 20 has a wastewater inflow pipe (not shown) and wastewater into which water flows. The wastewater outflow pipe (not shown) is provided.

In addition, the upper plate 10 and the lower plate 20 are formed with a plurality of assembling holes 13 and 23 penetrated along the outer circumferential surface so as to bind the plurality of flow path plates 30 and the heat transfer plate 50 stacked therebetween. The flow path plate 30 is provided with fastening holes (not shown) corresponding to the assembly holes 13 and 23 and formed on a plurality of flanges 41 protruding from an edge which is an outer circumferential surface thereof.

Accordingly, the upper plate 10 and the lower plate 20, and the flow path plate 30 and the heat transfer plate 50 positioned therebetween are firmly secured by the fastening member 14 (for example, the bolt 14a and the nut 14b). Are assembled.

In addition, in order to increase the airtightness of the plurality of flow path plates 30 and the heat transfer plate 50 stacked between the upper plate 10 and the lower plate 20, a plurality of inner assembly holes 15 are formed therein, and the flow path plate ( 30 and the heat transfer plate 40 are formed with an inner fastening hole (not shown) and an inner assembly hole (not shown) corresponding to the inner assembly hole 15.

Accordingly, the upper plate 10 and the lower plate 20, and the flow path plate 30 and the heat transfer plate 50 positioned therebetween are formed by the inner fastening member 16 (for example, the bolt 16a and the nut 16b). It is firmly assembled.

2 illustrates a structure of one layer applied to the present invention. As shown in the drawing, the flow path plate 30 has a circular plate shape, and a spiral flow path 35 is formed therein.

At both ends of the helical flow path 35, the first through-hole 31 and the third through-hole 33, which are open flow paths, and the second through-hole 32 and the fourth through-hole 34, which are closed flow paths, allow the fluid to flow in and out. A plurality of coupling protrusions 36 and coupling grooves 37 are formed on the partition wall 38 forming the spiral flow path 35 to facilitate coupling between the heat transfer plate 50 and the other flow path plates during the multi-stage stacking.

In addition, in order to maintain the airtightness between the flow path plate 30 and the heat transfer plate 50 during the lamination, a packing groove 39 into which the rubber packing 60 is fitted is formed on the upper and lower surfaces of the partition wall 38, that is, the joint surface. The first through hole 31, the second through hole 32, the third through hole 33 and the fourth through hole 34 correspond to the plurality of inner assembly holes 15 formed in the upper plate 10 and the lower plate 20. A plurality of inner fastening holes 43 are formed on the partition walls 38a and 38b therebetween.

In addition, the plurality of coupling protrusions 36 and the coupling groove 37 are formed in the same pattern so as to be easily assembled even when the flow path plate 30 is stacked in the forward and reverse directions during the multi-stage stacking.

In the above configuration, the first through holes 31 and the second through holes 32 are formed at one end of the spiral flow path 35, and the third through holes 33 and the fourth through holes 34 are formed in the spiral flow path 35. It is formed at the other end.

The first through holes 31 and the second through holes 32 form a circle, but are partitioned into semi-circular shapes by the partition wall 38a, and the first through holes 31 communicate with the helical flow path 35, while the second through holes 32 form a circle. The through hole 32 is surrounded by the partition wall 38a to allow the flow of fluid only in the up and down direction.

Similarly, the third through holes 33 and the fourth through holes 34 form a circle, but are partitioned into semicircular shapes by the partition wall 38b, and the third through holes 33 communicate with the helical flow path 35 while Four-hole 34 is surrounded by the partition 38b is allowed to flow the fluid only in the up and down direction.

On the other hand, the heat transfer plate 50 partitions each flow path plate 30 so that the waste water and the time water flows in the flow path plate in a state in which they are separated from each other, and at this time, the waste water side heat plays a role of a medium to be transferred to the water flow side.

To this end, the heat transfer plate 50 is preferably made of a metal having good thermal conductivity, and communicates for communicating only the corresponding hole at a position corresponding to the first through holes 31 to the fourth through holes 34 of the flow path plate 30. Balls 51, 52, 53, and 54 are selectively formed (all of which are shown in FIG. 2 for convenience of description), and coupling protrusions 36 and coupling grooves (for easy assembly with flow path plate 30). A coupling hole 56 corresponding to 37 and an inner assembly hole 55 corresponding to the inner assembly hole 15 are formed.

3 is a bottom assembly diagram of a waste heat exchanger having a spiral flow path according to the present invention, and a plurality of flow path plates 30 are stacked on the lower plate 20 in the forward and reverse directions as shown in FIG. The heat transfer plate 50 is installed, and a rubber packing (not shown) is fitted on the joint surface between the flow path plate 30 and the heat transfer plate 50.

The lower plate 20 has a plurality of assembly holes 23 formed on the outer circumferential surface thereof for fastening with the upper plate 10 as described above, and the wastewater outflow pipe 21 through which the water flows in and the wastewater flow out. 22 is provided.

The water inlet pipe 21 and the waste water outlet pipe 22 formed on the lower plate 20 are changed in position depending on whether the waste water flows in the flow path plate 30 stacked thereon or whether the time water flows, and according to the present invention. In the example, the time flows in the first channel plate 301.

Reference numerals 300 and 500 are used to induce the first time inflow and the final wastewater outflow, and are manufactured in the same shape as the flow path plate 30 and the heat transfer plate 50 for the convenience of production. Otherwise, the first through holes 31 to the fourth through holes 34 are respectively partitioned.

The flow path plates 30 are stacked in the forward and reverse directions, and only three flow path plates 301, 302, and 303 adjacent to the bottom plate 20 are illustrated for convenience of description.

The first flow path plate 301 has a second through hole 321 is in communication with the wastewater outlet pipe 22 and the third through hole 331 is in communication with the municipal water inlet pipe 21.

The second flow path plate 302 is stacked in the same shape or in the reverse direction as the first flow path plate 301, and the second through hole 322 communicates with the first through hole 311 of the first flow path plate 301. The first through hole 312 communicates with the second through hole 321 of the first flow path plate 301.

The third flow path plate 303 is stacked in the forward direction unlike the second flow path plate 302, and the fourth through hole 343 communicates with the third through hole 332 of the second flow path plate 302. The first through hole 313 communicates with the second through hole 322 of the second flow path plate 302.

The first heat transfer plate 501 is installed between the first flow path plate 301 and the second flow path plate 302, and the second heat transfer plate 502 is disposed between the second flow path plate 302 and the third flow path plate 303. ) Is installed.

As described above, the heat transfer plate 50 partitions each flow path plate 30 so that the waste water and the time water flow in the flow path plate in a state where the waste water and the water flow are separated from each other.

To this end, the first heat transfer plate 501 is formed between the first through hole 311 of the first flow path plate 301 and the second through hole 322 of the second flow path plate 302. Communication holes 511 and 521 are formed between the second through hole 321 and the first through hole 312 of the second flow path plate 302, respectively.

Further, the second heat transfer plate 502 is formed between the third through hole 332 of the second flow path plate 302 and the fourth through hole 343 of the third flow path plate 303. Communication holes 542 and 512 are formed between the second through hole 322 and the first through hole 313 of the third flow path plate 303, respectively.

The following describes the flow of time and wastewater according to the above configuration.

First, in case of water, the water flows into the wastewater heat exchanger through the water inlet pipe 21 of the lower plate 20, and then passes through the through holes of the induction members 300 and 500 to guide the first oil plate 301. Inflow into the first flow path plate 301 through the ().

Since the time flowed into the first flow path plate 301 is in a state in which the third through hole 331 is in communication with the spiral flow path 351, the outer counterclockwise from the inside along the spiral flow path 351 of the first flow path plate 301. Direction of the first communication hole (511) of the first heat transfer plate 501 flows in the direction to reach the first through hole 311, the first heat transfer plate 501 is in communication with the first through hole 311, the flow of fluid only in the up and down direction The second flow path plate 303 through the first through hole 313 of the third flow path plate 303 after passing through the first through hole 512 of the second heat transfer plate 502. ) Flows into.

Since the first flow path 313 is in communication with the spiral flow path 353, the time flow flowing into the third flow path plate 303 is clockwise from the outside to the inner side along the spiral flow path 353 of the third flow path plate 303. Flows to the third through hole 333, and then flows to the fourth flow plate 304.

Unlike waste water, the wastewater flows from the upper side to the lower side. The wastewater approaching the third flow path plate 303 is the fourth through hole 343-second of the third flow path plate 303 in which fluid flow is allowed only in the vertical direction. The fourth flow path 542 of the heat transfer plate 502 passes through the third flow path 332 of the second flow path plate 302 into the second flow path plate 302.

Wastewater introduced into the second flow path plate 302 is in a state in which the third through hole 332 is in communication with the spiral flow path 352. Flows into the first through hole 312, and communicates with the first through hole 312 but permits the flow of fluid only in the up and down direction, allowing the second communication hole 521 and the first flow plate of the first heat transfer plate 501 to flow. The second through hole 321 of 301, and through the through hole of the guide member 300 and 500 to guide the lower plate 20 flows to the outside through the waste water outlet pipe 22 of the lower plate 20.

In this way, the wastewater and the time flow is separated from each other by each flow path plate 30, the layer layer flows and flows from the inner side to the outer side or the inner side to the outer side to increase the heat exchange rate with the heat transfer plate 50, the spiral of a certain width By flowing along the flow path 35, the flow velocity is constant and the flow of the fluid is smooth, thereby preventing the accumulation of suspended matters in the flow path plate 30.

Figure 4 is an interrupted assembly diagram of a waste heat exchanger having a spiral flow path according to the present invention, it will be described in a continuous structure with Figure 3 for convenience of description.

The fourth flow path plate 304 is stacked in the same shape or in the opposite direction as the third flow path plate 303, and the third through hole 334 communicates with the fourth through hole 343 of the third flow path plate 303. The fourth through hole 344 communicates with the third through hole 333 of the third flow path plate 303.

The fifth flow path plate 305 is stacked in the forward direction unlike the fourth flow path plate 304, and the third through hole 335 communicates with the fourth through hole 344 of the fourth flow path plate 304. The two through holes 325 communicate with the first through holes 314 of the fourth flow path plate 304.

The sixth flow path plate 306 is stacked in a reverse direction with the fifth flow path plate 305, and the first through hole 316 communicates with the second through hole 325 of the fifth flow path plate 305. The through hole 326 communicates with the first through hole 315 of the fifth flow path plate 305.

The third heat transfer plate 503 is installed between the third flow path plate 303 and the fourth flow path plate 304, and the fourth heat transfer plate (between the fourth flow path plate 304 and the fifth flow path plate 305). 504 is installed, and a fifth heat transfer plate 505 is installed between the fifth flow path plate 305 and the sixth flow path plate 306.

As described above, the heat transfer plates partition each flow path plate 30 so as to flow in the flow path plate in a state in which the waste water and the time water are separated from each other, and at this time, the waste water side heat transfers to the water flow side.

Accordingly, the third heat transfer plate 503 is disposed between the fourth through hole 344 of the fourth flow path plate 304 and the third through hole 333 of the third flow path plate 303. Communication holes 533 and 543 are formed between the third through hole 334 and the fourth through hole 343 of the third flow path plate 303, respectively.

The following describes the flow of time and wastewater according to the above configuration.

First, in the case of the sisu, the sisu flowing along the helical flow path 353 of the third passage plate 303 communicates with the third through hole 333, but the third heat transfer plate 503 allows the flow of fluid only in the vertical direction. The third through hole 533-the fourth through hole 344 of the fourth flow path plate 304-the third through hole 534 of the fourth heat transfer plate 504 passes through the third through hole of the fifth flow path plate 305 ( 335 is introduced into the fifth flow path plate 305.

Since the third flow hole 335 is in communication with the spiral flow path 355, the time flow flowing into the fifth flow path plate 305 is inward and outward counterclockwise along the spiral flow path 355 of the fifth flow path plate 305. Direction to reach the first through hole 315, and then communicate with the first through hole 315, the first communication hole 515 of the fifth heat transfer plate 505 allowed only the flow of fluid in the up and down direction It flows upward through the second through hole 326 of the flow path plate 306.

Waste water flows into the sixth flow path plate 306 through the third through hole 336, and since the third through hole 336 is in communication with the inner spiral flow path 356, the waste water flows from the inside along the spiral flow path 356. The second communication hole 525 of the fifth heat transfer plate 505 which flows in the outer clockwise direction to reach the first through hole 316 and then communicates with the first through hole 316 but permits the flow of fluid only in the up and down direction. A second through hole 325 of the fifth flow plate 305 through a second through hole 524 of the fourth heat transfer plate 504 and a fourth through the first through hole 314 of the fourth flow plate 304. It flows into the flow path plate 304.

The wastewater introduced into the fourth flow path 304 is in a state in which the first through hole 314 is in communication with the inner spiral flow path 354. 334, and then flows downward through the fourth communication hole 543 of the third heat transfer plate 503 in communication with the third through hole 334 but allowing the flow of fluid only in the up and down direction.

According to the above configuration, waste water and time water have the characteristics shown in Table 1 in the flow thereof.

Europan Wastewater Sisu First Euro Plate 301 Pass Flow from inside to outside counterclockwise Second Europlate 302 Flow from inside to outside clockwise Pass Third Europan 303 Pass Flow clockwise from outside to inside Fourth Europlate 304 Flow from outside to inside counterclockwise Pass Fifth Euro Plate (305) Pass Flow from inside to outside counterclockwise Sixth Europlate 306 Clockwise flow from inside to outside Pass

That is, as shown in Table 1, the time water flows in the odd-layer flow path plate, the waste water flows in the even-layer flow path plate, and the direction in which the layers flow in different layers is changed.

Therefore, the maximum effect can be obtained at the time of heat exchange by intersecting each of the laminated flow path plates 30 or flowing in a layered structure.

Of course, the table shows, for example, whether the water flows in the first flow path plate 301 or waste water flows, and the flow of the time water and the waste water varies depending on the stacking direction of the flow path plate 30.

5 is a top assembly diagram of a waste heat exchanger having a spiral flow path according to the present invention, and will be described in a continuous structure with FIG. 4 for convenience of description.

As shown in the figure, the flow path plate 30 is stacked below the upper plate 10 in the forward and reverse directions, and the heat transfer plate 50 is provided between the flow path plates 30.

As described above, the upper plate 10 has a plurality of assembly holes 13 formed on its outer circumferential surface for fastening with the lower plate 20, and a wastewater inflow pipe 12 through which wastewater flows in and a wastewater inflow pipe through which time water flows out. (11) is provided. Reference numeral 15 is an inner assembly hole.

In the wastewater inflow pipe 12 and the shisu outflow pipe 11 formed on the upper plate, their positions are changed depending on whether the wastewater flows in the flow path plate 30 stacked at the bottom thereof or whether the time flows. Wastewater is shown as flowing.

The eighth flow path plate 308 is located at the lower end of the upper plate 10 and the first through hole 318 communicates with the wastewater inlet pipe 12, and the fourth through hole 348 communicates with the shisu discharge pipe 11. do.

The seventh flow path plate 307 is stacked in the same shape or in the reverse direction as the eighth flow path plate 308, and the third through hole 337 communicates with the fourth through hole 348 of the eighth flow path plate 308. The fourth through hole 347 communicates with the third through hole 338 of the eighth flow path plate 308.

Reference numerals 300 and 500 are used to induce the first waste water inflow and the final time outflow, and are preferably manufactured in the same shape as the flow path plate 30 and the heat transfer plate 50 for the convenience of production. Unlike the 30, the first through fourth through holes are respectively partitioned.

The following describes the flow of time and wastewater according to the above configuration.

First, in the case of time, the time passed through the second through hole 326 of the sixth flow plate 306 and the first communication hole 516 of the sixth heat transfer plate 506 is a first through hole of the seventh flow plate 307. It is introduced into the seventh flow path plate 307 through 317.

Since the first flow hole 317 is in communication with the spiral flow path 357, the time flow flowing into the seventh flow path plate 307 flows from the outside to the inner clockwise direction along the inner spiral flow path 357. 337), the third communication hole (537)-the eighth flow path 308 of the seventh heat transfer plate 507 is in communication with the third through hole (337), but only the flow of fluid in the up and down direction is allowed. Four through holes 348 and through the through hole 500 and 300 guide member flows to the water discharge pipe 11 of the upper plate (10).

The wastewater is introduced into the wastewater heat exchanger through the wastewater inlet 12 of the upper plate 10, and then passes through the through holes of the induction members 300 and 500 to guide the final stage, for example, to the eighth flow path plate 308. Into the eighth flow path plate 308 through 318.

The wastewater introduced into the eighth flow path plate 308 is in the outer to the inner side along the spiral flow path 358 of the eighth flow path plate 308 because the first through hole 318 is in communication with the inner spiral flow path 358. A fourth communication hole 547 of the seventh heat transfer plate 507 which flows in a counterclockwise direction to reach the third through hole 338 and communicates with the third through hole 338 but permits the flow of fluid only in the up and down directions; The fourth flow path 347 of the seventh flow path plate 307 is passed through the fourth communication hole 546 of the sixth heat transfer plate 506 to the sixth flow path plate 306.

Thereafter, the wastewater is drained to the outside through the wastewater outlet pipe 22 of the lower plate 20 through the sixth flow path plate 306 to the first flow path plate 301 described above.

Accordingly, the waste water and the time water pass through the flow path plate 30 in the waste heat exchanger in a diaphragm structure in a state of being separated from each other, and flow through the spiral flow path 35 from the outside to the inside or from the inside to the outside to increase the heat exchange rate. I can double it.

As described in detail above, according to the present invention by forming a spiral flow path on the circular flow path plate to smoothly induce the flow of the fluid while eliminating the variation in the flow rate in the flow path plate to prevent the precipitation of suspended solids, etc. on the flow path Can be.

In addition, the wastewater and time water flow through the flow path plate in the waste heat exchanger in a diaphragm structure in a state where they are separated from each other, and the heat exchange rate between the waste water and the time water is increased by flowing from the outside to the inside or from the inside to the outside along the spiral flow path in the flow path plate. It is possible to prevent the deflection phenomenon of the flow path plate even when the multilayer stack is formed by forming a partition wall for forming the spiral flow path in the flow path plate.

As a result, the heat exchange rate between the wastewater and the time water can be further improved, and maintenance can be very easy by preventing the accumulation of suspended matter on the flow path or the deflection of the flow path plate.

Claims (3)

In the wastewater heat exchanger in which the heat and waste water flows into the diaphragm structure along the partitioned flow path, the heat exchange is performed. A spiral flow path is formed to smoothly guide the flow of waste water or wastewater introduced into the flow path, and to reduce the variation in flow velocity in the flow path to prevent precipitation of suspended matter, and open and closed openings are provided at both ends of the flow path. Each flow path plate is formed, and each flow path plate is divided when the flow path plates are stacked in the forward and reverse directions, and the open and closed holes correspond to the flow path plates in which the water and waste water are stacked in a multi-layered structure. Optionally provided with a heat transfer plate formed with a perforated communication hole, The flow path plate is a substantially circular plate is formed a spiral flow path that converges to the center by the partition wall, the packing groove is formed on the partition wall to the rubber packing to maintain the airtightness when laminated with the heat transfer plate, laminated in the forward and reverse direction Coupling protrusions and coupling grooves are provided on one side and the other side of the partition wall to maintain the mutual fastening state when The upper plate and the lower plate and the fastening member screwed on the upper plate and the lower plate assembly hole are provided with the assembly hole perforated on the outer circumferential surface of the multi-stacked flow path plate and the heat transfer plate so as to maintain the lamination state firmly. Wastewater heat exchanger having a spiral flow path, characterized in that provided. delete The method of claim 1, The flow path plate has a flange formed on its outer circumferential surface, and fastening holes corresponding to the assembling holes perforated in the upper and lower plates are formed on the flange, and are integrally assembled with the upper and lower plates by the fastening member. Wastewater heat exchanger having a spiral flow path.

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