JP2006162120A - Cleaning device and cleaning method of spiral hot waste water heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cleaning device and a cleaning method capable of enhancing the cleaning effect in a spiral pipe, by flowing high temperature water, by selecting every individual pipe with a ball moored in advance. <P>SOLUTION: This spiral hot waste water heat exchanger has a high temperature water passage formed by respectively connecting the winding start end of spiral pipes superposed in a plurality of stages to a first ball storage device and the winding finish end to a second ball storage device, and a spiral passage formed airtightly with mutual walls of a partition plate made by forming a plate in a spiral shape, the spiral pipes being inserted in the spiral passage; and passes low temperature water through the spiral passage and passes the high temperature water through into the high temperature passage; and is characterized in that cleaning balls of the number corresponding to the number of spiral pipes are respectively stored in the first ball storage device and the second ball storage device, and the cleaning balls are reciprocatably passed through into this pipe by selecting optional one of the spiral pipes by using a flow passage switching means, and are successively, similarly and reciprocatably passed one by one even through the other spiral pipe. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a warm drainage heat exchanger that effectively uses thermal energy of water discharged from a bathhouse or the like, and relates to a ball cleaning apparatus and cleaning method suitable for cleaning an inside of a spiral tube in a spiral type warm drainage heat exchanger. Is.

  To collect the heat from domestic wastewater from the bathrooms, kitchens, washrooms, etc. of accommodation facilities and apartments, hot wastewater from hot spring pools, baths, sauna baths, etc., and use this as a heat source for hot water supply There are various heating systems, including heat exchangers. For example, in a bathhouse using a hot spring, when the temperature of the fountain water at the fountain is low, a method is adopted in which it is heated through a boiler and then flows into a bathtub. The hot water in the bathtub needs to be appropriately drained and replaced with clean new hot water or supplemented according to the frequency of use. In this case, do not drain the warm water as it is, pass it through the high temperature side of the heat exchanger, make effective use of the thermal energy that is held, warm the cold spring water that passes through the low temperature side, and then drain it. Yes.

  There are two types of heat exchangers, the cannula type and the plate type. Although the cannula type has a complicated structure but has an advantage of easy cleaning, it has a drawback of being expensive and large. On the other hand, the plate type has the advantage that the structure is simple and inexpensive. However, when cleaning, it is necessary to stop the operation, disassemble the heat exchanger, clean the heat transfer plate, and reassemble.

  As an example of a structure that solves these problems, there is a “vortex-type hot waste water heat exchanger”. This structure includes a high-temperature water passage formed by connecting a winding start end of a spiral tube having a circular section with a plurality of stages to a first communication tube and a winding end end to a second communication tube, respectively. A partition plate having a flat plate formed in a spiral shape is installed between the lower plate and the upper plate, and a spiral passage formed between the walls of the partition plate in an airtight manner, and the spiral tube is disposed in the spiral passage. An introduction pipe and a discharge pipe which are inserted and communicated with a container portion formed by the lower plate, the upper plate, and a tubular body, wherein low-temperature water is introduced into the container portion, and the spiral passage is connected to the low-temperature water. And a high temperature water passage through the high temperature water passage.

  The cleaning method according to this structure is to introduce a soft synthetic resin ball (so-called sponge ball) having an outer diameter slightly larger than the inner diameter of the spiral tube and having a hollow inside into the communication tube, and applying water pressure to the inside of the spiral tube. And deposits adhered to the inner wall are scraped off. However, this method has a problem that the cleaning efficiency is poor because there are cases where two sponge balls are contained in one tube, or there are some tubes that do not enter, so that all the spiral tubes may not enter evenly. .

  Moreover, although the object is different, Patent Document 1 discloses a method of passing a sponge ball through a snow melting pipe in a snow melting pipe cleaning method of a snow melting system. A ball circulation device equipped with a sponge ball mooring device is installed in the middle of a plurality of snow melting pipes, and the sponge balls are passed through the snow melting pipes. The piping system is as shown in FIG.

  In FIG. 8, groundwater passes through the water supply pipe 30, passes through the ball circulation device 70 from the main valve 50, flows through the snow melting pipe 60, passes through the ball circulation device 70 and the main valve 51, passes through the drainage pipe 40, and reduced well. Reduced to 80. The sponge balls in the snow melting pipe 60 pass while removing deposits such as scale and slime due to the flow of groundwater, and enter the snow melting pipe 60 again by the ball circulation device 70. The separated deposit passes through the ball circulation device 70 together with the water, passes through the drain pipe 40, and is reduced to the reduction well 90. The ball circulation device 70 is provided with a flapper valve so that sponge balls can be moored, and the balls are washed in a predetermined operation mode.

JP 2002-302922 A

  The method described in Patent Document 1 uses a sponge ball to clean the spiral tube of the spiral hot water heat exchanger, and is considered to be an effective means for cleaning.

  A method for cleaning the spiral tube of the spiral-type hot waste water heat exchanger by applying this can be considered. However, this method is a cleaning device in which sponge balls are previously moored to each tube, but since water flows uniformly to all the tubes, the water pressure is applied to individual tubes intensively to achieve the cleaning effect. It cannot be increased.

  This invention is made | formed in view of this point, and it aims at providing the washing | cleaning apparatus and washing | cleaning method which can improve the washing | cleaning effect in a spiral tube.

  The present invention solves the above-described problem, and provides a cleaning device and a cleaning method that can enhance the cleaning effect in the spiral tube by sorting each individual tube previously moored with a ball and flowing high-temperature water. Is.

  The cleaning device for a spiral-type hot wastewater heat exchanger according to the present invention has a winding start end of a spiral tube having a circular cross section stacked in a plurality of stages as a first ball storage device and a winding end as a second ball. A high-temperature water passage formed by connecting to each storage device and a partition plate formed in a spiral shape on a flat plate were installed between the lower plate and the upper plate, and the space between the walls of the partition plate was formed airtight. A spiral passage, and the spiral tube is inserted into the spiral passage, and is provided with an introduction tube and a discharge tube communicated with the container portion formed by the lower plate, the upper plate, and a tubular body. Is a swirl-type hot drainage heat exchanger in which low-temperature water is introduced, and the low-temperature water passes through the spiral passage and the high-temperature water passes through the high-temperature water passage, and the first ball storage device or the first Two ball storage devices are provided for the number of spiral tubes. The first and second ball storage devices each include a ball mooring unit that floats the ball within a predetermined range, and each of the balls can pass through the spiral tube, A flow path switching means is provided so that the spiral tube can be selected and the ball can pass through the tube.

  In the cleaning method according to the present invention, the high-temperature water is introduced into the first ball storage device and discharged from the second ball storage device, and the high-temperature water is supplied to the second ball storage device. And a second pattern to be discharged from the first ball storage device is set, any one of the spiral tubes is selected by the flow path switching means, and the ball passes through the tube The patterns are switched at regular intervals, the ball is reciprocated through the spiral tube, and the same spiral reciprocation is sequentially performed on the other spiral tubes one by one. .

  A first embodiment of the flow path switching means according to the present invention includes a rotor in which a plurality of shunt windows and a selection window are formed, and a box portion in which the rotor is fitted in an airtight manner. A ball housing portion hermetically coupled to the box portion and having a plurality of partition recesses, and an introduction / discharge pipe communicating with the box portion, the number of the partition recesses being the number of the shunt window and the spiral Corresponding to the number of tubes, the flow dividing window and the partition recess can be selectively communicated, and the ball can be moored by a stopper installed in the partition recess, and the spiral tube is provided in the ball storage portion. It is characterized by being connected to.

  A second embodiment of the flow path switching means according to the present invention includes a first three-way switching valve connected to a high-temperature water inflow portion, a second three-way switching valve connected to a high-temperature water outflow portion, A first two-way switching valve connected between the first ball storage device and the winding start end of the spiral tube, and a connection between the second ball storage device and the winding end end of the spiral tube A second two-way switching valve is provided.

  Therefore, according to the present invention, since all the spiral tubes are preliminarily selected for each individual spiral tube to which a ball, that is, a sponge ball is moored and high-temperature water is allowed to flow, the balls are reciprocated at a high pressure. And has the advantage that high detergency can be obtained.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings. FIGS. 1-7 shows the Example of the washing | cleaning apparatus and washing | cleaning method of the spiral type warm waste water heat exchanger concerning this invention.

  FIG. 1 is a diagram showing a schematic configuration of a spiral-type hot wastewater heat exchanger 100 according to an embodiment of the present invention, and FIG. 2 is a cross-sectional plan view showing details of a part cut in the horizontal direction of FIG. 3 is a longitudinal sectional view of FIG.

  In these drawings, the spiral-type hot drain heat exchanger 100 winds the winding start end of the spiral tube 3 (3a-3e) having a plurality of stacked circular cross sections around the first ball storage device 5a. The end plate is connected to a second ball storage device 5b (the ball storage device is represented by 5), respectively, and a hot plate 4a formed by connecting the flat plate and a partition plate 4 formed in a spiral shape are a lower plate. A spiral passage 4b, which is installed between 1a and the upper plate 1b (indicated as “1” when both are shown), in which the wall of the partition plate 4 is formed in an airtight manner, The spiral tube 3 is inserted and arranged in the spiral passage 4b, and is provided with an introduction tube and a discharge tube 10 communicated with a container portion 20 formed by a lower plate 1a, an upper plate 1b, and a tubular body 21. Low-temperature water is introduced into the section, and low-temperature water passes through the spiral passage 3 and Inside the water passage has a configuration in which hot water passes.

  Between the ball storage devices 5a and 5b and the spiral tube 3, various kinds of flow path switching valves 17a and 17b shown in FIGS. 4 and 6, which will be described later (hereinafter, both are indicated by “17”). There is provided a flow path switching means. The switching units are indicated by ae, respectively.

In the ball storage devices 5a and 5b, a number of cleaning balls (for example, sponge balls) corresponding to the number of the spiral tubes 3 are stored 1, and ball mooring portions 13a for floating these balls B and Ba within a predetermined range. 13b (13a ₁ -13a ₅ , 13b ₁ -13b ₅ , which may be displayed together as “13”), and the balls B and Ba can pass through the spiral tube, respectively. The flow path switching means described above can select an arbitrary spiral tube 3 and allow the balls B and Ba to pass through the tube.

  Further details will be described. 5a is a first ball storage device, and 5b is a second ball storage device, and a titanium tube 3 having a circular cross section is formed in a spiral shape to form a plurality of stages, in the figure, five stages stacked. The start end is connected to the first ball storage device 5a, and the winding end end is connected to the second ball storage device 5b to form a high-temperature water introduction and drainage passage and a sponge ball mooring box. . These ball storage devices 5a and 5b are the same, and the structure and function of the ball storage device 5 will be described later.

  The first ball storage device 5a connected to the winding start end of the spiral tube 3 communicates with the first inlet / outlet of the hot water, and the second ball storage device 5b connected to the winding end end communicates with the second entrance / exit. is doing. 4 is a partition plate in which a flat plate made of stainless steel is formed in a spiral shape, and the space between the walls is slightly larger than the outer diameter of the spiral tube 3, and a spiral passage 4a is formed so that the spiral tube 3 is disposed between the wall surfaces. is doing.

  2a and 2b are elastic packings such as rubber, which are installed between the lower plate 1a made of stainless steel and the upper plate 1b made of stainless steel so that the lower end and upper end of the partition plate 4 bite into each other. The four walls are hermetically partitioned, and the lower plate 1a and the upper plate 1b are fastened by bolts 9 and nuts 8 to integrate them. The region formed by the partition plate 4 is formed as a spiral passage 4a between the inlet and the outlet, and serves to pass the low-temperature water Wc through this passage.

  1c and 1d are tubular steel bodies made of stainless steel, 1c is configured as an inner body tube, 1d is formed as an outer body tube, and the lower plate 1a and the upper plate 1b are hermetically installed by packings 2a and 2b. Has been. Reference numeral 6 denotes a low-temperature introduction pipe for introducing the low-temperature water Wc, and 7 denotes a discharge pipe serving as an outlet of the low-temperature water Wc, each communicating with the spiral passage 4a.

  The low-temperature water Wc introduced from the low-temperature water introduction pipe 6 passes through the spiral passage 4b and is led from the low-temperature water drain pipe 7 to a boiler installed outside. The high temperature water is introduced from the introduction / discharge pipe 10 which is the inlet of the first ball storage device 5a serving as a communication pipe, passes through the inside of the spiral tube 3, and then passes through the second ball storage device 5b to reach the high temperature water. Water is discharged from the water introduction / discharge pipe 10 to the outside. Therefore, the heat exchange between the high temperature water and the low temperature water Wc causes the low temperature water Wc to be warmed and further heated to a higher temperature by a boiler installed outside.

  4 is a side sectional view of the ball storage device, and FIG. 5 is a plan sectional view seen from the left side.

  The feature of this embodiment is that one sponge ball always passes through one spiral tube 3 and is moored at the ball mooring portion 22 provided at the entrance of the same tube after passing, and a plurality of spiral tubes 3. Any one of these is selected, and the sponge balls are washed one by one through the spiral tube 3 one by one.

  The ball mooring portion 13 is formed by a stopper, for example, and 11 is a cylindrical box container, which is airtightly coupled to the ball storage portion 12 equipped with a stopper for mooring the sponge ball B. Reference numeral 10 denotes a high-temperature water introduction / discharge pipe communicating with the chamber 11a of the box portion 11, and introduces / discharges the high-temperature water via the flange 10a. Further, the end of the spiral tube 3 is connected to the ball storage portion 12, and thus communicates with the chamber 11a.

  The number of stages of the ball storage portions 12 corresponds to the number of the spiral tubes 3 stacked, and the number of stoppers (ball mooring portion 13, hereinafter referred to as the stopper 13 for convenience of explanation) is also the same, and is five in the drawing. The U-shaped stopper 13 is manufactured by bending a metal rod, and the opposing width is slightly larger than the outer diameter of the sponge ball B so that the sponge balls B and Ba can float in the region surrounded by the stopper 13. is doing.

  Reference numeral 14 denotes a bowl-shaped rotor coupled to the shaft 15, which is formed with a diversion window 14 a-14 e and a selection window 14 f, whose outer diameter is loosely fitted to the inner diameter of the box portion 11 so as to be airtight and freely rotatable. The diversion windows 14a-14e are opposed to the partition recesses 12a-12e formed in the ball storage portion 12, and in the drawing, each window and the partition recesses are in a state of communicating with each other in five sets. The left end side of the shaft 15 is coupled to a stepping motor (not shown) so that it can rotate a predetermined angle.

  The introduction / discharge pipe 10 is connected to the side wall of the box part 11 and communicates with the five spiral pipes 3 through the chamber 11a in the drawing, so that the sponge balls that flow in together with the high-temperature water from the spiral pipe 3 B and Ba are moored by the stoppers 13 installed in the respective partition recesses 12a-12e.

  The state shown in FIG. 4 and the state shown in FIG. 6 are selected according to the rotation state of the rotor 14.

  FIG. 4 is a side sectional view of the ball storage device 5 when selecting any one of the plurality of spiral tubes, and FIG. 6 is a side of the ball storage device 5 when selecting all the spiral tubes. A cross-sectional view is shown.

  When the rotor 14 is rotated 180 degrees from the state shown in FIG. 6, the state shown in FIG. 4 is obtained, the selection window 14f communicates with the partition recess 12c, and the other partition recesses 12a, 12b, 12d, and 12e pass from the chamber 11a. Therefore, the introduction / discharge pipe 10 communicates only with the spiral pipe 3c. Similarly, by rotating the rotor 14 by a predetermined angle, the introduction / discharge pipe 10 and only one of the arbitrary spiral pipes 3 can be selected and communicated.

  The cleaning method will be described below.

  High temperature water is introduced into the first ball storage device 5a, and after passing through the spiral tube 3, the first pattern discharged from the second ball storage device 5b and high temperature water from the second ball storage device 5b are introduced. Then, after passing through the spiral tube 3, a second pattern to be discharged from the first ball storage device 5a is set. When operating in the first pattern, the sponge balls B and Ba that have passed through the spiral tube 3 are moored by the stopper 13 of the second ball storage device 5b, and in the second pattern operation, the first ball storage device 5a. The stopper 13 is moored.

  In the state of FIG. 4, the high-temperature water is sent only to the spiral tube 3 c, but the pressure is almost the same as the pressure of the high-temperature water flowing into the high-temperature water introduction / discharge tube 10. In FIG. 2, the pressure delivered to one swirl tube 3 is dispersed and reduced in pressure, whereas a specific one swirl tube 3 c has a higher introduction pressure. Then, using the switching valve, the two patterns are switched at regular intervals, and the sponge ball B is reciprocated through the spiral tube 3c. Accordingly, deposits such as scale and slime adhering to the inner wall of the spiral tube 3 by the reciprocating passage of the sponge ball B are scraped off and discharged together with the high temperature water through the high temperature water introduction / discharge tube 10.

  When the rotor 14 is rotated by a predetermined angle, the introduction / discharge tube 10 and another spiral tube 3 communicate with each other, so that the sponge ball B is sequentially reciprocated through the spiral tube 3 as described above, The spiral tube 3 can be cleaned. Therefore, according to this cleaning method, since the sponge ball B reciprocates through the arbitrary spiral tube 3 one by one with a high pressure, there is an advantage that the cleaning effect can be enhanced.

  FIG. 1 is a piping system diagram showing a cleaning method in one example, and shows a state in which one specific tube is selected and cleaned from among the five spiral tubes 3a to 3e. In this example, two-way switching electromagnetic valves 17a and 17b are employed as the flow path switching means.

  Reference numeral 16a is an input valve, and 16b is an output valve, each of which is an electromagnetic valve capable of switching and controlling the inflow / outflow opening / closing direction and the inflow / outflow direction of high temperature water in three directions.

  FIG. 1 shows a case where only the spiral tube 3c is cleaned. The pipe 18b side of the input valve 16a is closed, the pipe 18a is opened, the pipe 18c side of the output valve 16b is closed, and the pipe 18d is closed. Is opened.

  The two-way switching electromagnetic valves 17a and 17b are opened only at the portion communicating with the spiral tube 3c, and the high-temperature water flowing from the input valve 16a passes through the pipe 18a to the second ball storage device 5b. Inflow. For this reason, the moored sponge ball B passes only through the spiral tube 3c and is sent to the first ball storage device 5a, where the hot water moored and heat-exchanged as indicated by Ba is introduced and discharged from the pipe. 10 passes through the pipe 18d and is discharged from the output valve 16b to the outside.

  If the piping 18a side of the input valve 16a is closed and the piping 18b is opened, and the piping 18d side of the output valve 16b is closed and the piping 18c is opened, the hot water flowing from the input valve 16a Then, it passes through the pipe 18d via the pipe 18b and flows into the first ball storage device 5a. For this reason, the moored sponge ball B passes through the spiral tube 3c and is sent to the second ball storage device 5b. The sponge ball B is moored here, and the heat-exchanged high-temperature water passes through the pipes 18a and 18c from the introduction / discharge pipe 10 and is discharged to the outside from the output valve 16b.

  Therefore, by appropriately controlling the opening and closing of the input valve 16a, the output valve 16b, the two-way switching electromagnetic valve 17a, and the two-way switching electromagnetic valve 17b, the sponge ball B reciprocally passes through the arbitrary spiral tube 3 one by one with high pressure. Therefore, a high detergency can be obtained.

  The sponge ball B is not limited to a synthetic resin containing closed cells, but may be a material such as ceramic or natural rubber containing closed cells having a specific gravity of about 1. Further, the diameter may be slightly smaller than the inner diameter of the spiral tube 3 to reduce the resistance when passing through the tube, so that it can be easily washed when the inflow pressure of the high temperature water is low. Furthermore, a polyhedron or a sphere having relatively large irregularities in the outer diameter portion can also be regarded as the ball of this embodiment.

  FIG. 7 shows a piping system diagram when the connection of the piping is changed, which corresponds to a state in which high-temperature water can flow into the five spiral tubes 3a to 3e shown in FIG.

  17a is a two-way switching solenoid valve connected to one side on the first ball storage device 5a side and 17b to the second ball storage device 5b side, and the other is the winding start end and winding end end of the spiral tube 3 Are connected to each. A plurality of two-way switching solenoid valves 17a and two-way switching solenoid valves 17b are provided corresponding to the winding start ends and winding end ends of the five spiral tubes 3a to 3e, respectively. Reference numerals 18a to 18d are pipes.

  In the state of FIG. 7, all the two-way switching solenoid valves 17a and the two-way switching solenoid valves 17b are opened, and the high-temperature water flowing in from the input valve 16a is first fed from the pipe 18b through the pipe 18d. Along with the sponge ball B moored here, the ball is stored in the ball storage device 5a, and then passed through the spiral tube 3 to the second ball storage device 5b. Here, the sponge ball B is moored, and the heat-exchanged high-temperature water passes through the pipes 18a and 18c from the introduction / discharge pipe 10 and is discharged to the outside from the output valve 16b.

  When the piping 18a side of the input valve 16a is opened and the piping 18b side is closed, the piping 18c of the output valve 16b is closed and the piping 18d side is opened. The sponge ball B is moored to the first ball storage device 5a, and the heat-exchanged high-temperature water can be discharged from the pipe 18d through the output valve 16b. Therefore, by controlling the input valve 16a and the output valve 16b to open and close, the high-temperature water in the spiral tube 3 can be reciprocated together with the sponge ball B. Although the inside of the spiral tube 3 is cleaned by the reciprocating passage at this time, the cleaning efficiency is inferior to the cleaning method of the example shown above.

The piping system figure which shows the Example of a ball | bowl storage apparatus at the time of selecting the arbitrary spiral tube which shows the general | schematic structure of the Example of this invention. The partial cross section top view of the spiral type heat exchanger containing the ball | bowl storage apparatus by a present Example. FIG. 3 is a side sectional view of FIG. 2. The Example sectional side view of the ball | bowl storage apparatus at the time of selecting arbitrary spiral tubes. FIG. 5 is a plan sectional view seen from the left side of FIG. 4. The Example sectional side view of the ball | bowl storage apparatus at the time of selecting all the spiral tubes. The piping system figure which shows the Example of a ball storage apparatus. The piping system figure as a prior art example which shows the ball | bowl washing | cleaning method in a snow melting system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1a ... Lower plate, 1b ... Upper plate, 1c ... Inner fuselage tube, 1d ... Outer fuselage tube, 2a ... Lower packing, 2b ... Upper packing, 3 ... Spiral tube, 4 ... Partition plate, 4a ... Hot water passage, 4b ... Swirl passage, 5a ... first ball storage device, 5b ... second ball storage device, 6 ... low temperature water introduction pipe, 7 ... low temperature water discharge pipe, 10 ... high temperature water introduction / discharge pipe, 11 ... box ( Container), 12 ... ball storage part, 13 ... stopper, 14 ... rotor, 20 ... container part, 21 ... trunk, 100 ... spiral hot drainage heat exchanger, Wc ... low temperature water, B, Ba ... sponge balls.

Claims (4)

  It has a spiral tube with a circular section that is stacked in multiple stages, and the winding start end of each spiral tube is connected to the first ball storage device and the winding end end is connected to the second ball storage device. The formed high-temperature water passage, the partition plate formed in a spiral shape on the flat plate is installed between the lower plate and the upper plate, and the spiral passage formed between the walls of the partition plate in an airtight manner, and the spiral passage The spiral tube is disposed, and includes an introduction tube and a discharge tube communicating with the container portion formed by the lower plate, the upper plate, and the body, and low temperature water is introduced into the container portion, and the spiral tube A swirl-type hot drainage heat exchanger in which the low-temperature water passes through the passage and the high-temperature water passes through the high-temperature water passage, and the swirl is provided in the first ball storage device or the second ball storage device. The number of cleaning balls corresponding to the number of tubes is stored in the front. Each of the first and second ball storage devices includes a ball mooring unit that floats the ball within a predetermined range, and the balls can each pass through the spiral tube, and an arbitrary spiral tube is selected and the ball is placed in the tube. An apparatus for cleaning a spiral-type hot wastewater heat exchanger, characterized by comprising a flow path switching means for passing a ball.   In Claim 1, the flow path switching means includes a rotor formed with a plurality of diversion windows and one selection window, a box part in which the rotor is fitted in an airtight manner, and a box part. A ball storage portion that is hermetically coupled and has a plurality of partition recesses, and an introduction / discharge pipe that communicates with the box, and the number of partition recesses corresponds to the number of the diversion window and the spiral tube The diversion window and the partition recess can be selectively communicated, the ball is moored by a stopper installed in the partition recess, and the spiral tube is connected to the ball storage portion. A swirl type hot water heat exchanger cleaning device.   The flow path switching means includes a first three-way switching valve connected to the high-temperature water inflow portion, a second three-way switching valve connected to the high-temperature water outflow portion, the first ball storage device, and the spiral tube A first two-way switching valve connected between the winding start end and a second two-way switching valve connected between the second ball storage device and the winding end of the spiral tube. A swirl type hot water heat exchanger cleaning device characterized by that. A first pattern for introducing the high-temperature water into the first ball storage device and discharging it from the second ball storage device using the spiral drain heat exchanger cleaning device according to claim 1; The high-temperature water is introduced into the second ball storage device, and a second pattern to be discharged from the first ball storage device is set, and any one of the spiral tubes by the flow path switching means is set. The ball is passed through the tube, the patterns are switched at regular intervals, the ball is reciprocated through the spiral tube, and the same reciprocating passage is sequentially performed for the other spiral tubes one by one. A method for cleaning a spiral-type hot wastewater heat exchanger, characterized in that

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