JP5048639B2 - Hot water supply / discharge hot water system and hot water supply / discharge method in hot bath related facilities - Google Patents

Description

  The present invention relates to a hot water supply / discharge hot water system and a hot water supply / discharge hot water method in a hot bath-related facility such as a public bath or a hot spring inn.

  Hot bath-related facilities such as public baths and hot spring inns have large baths with large bathtubs and saunas, but in large baths where a large number of people can bathe at once, the hot water in the bath (bath) can be changed. Otherwise, it will be contaminated with sebum from bathers. In this regard, if it is a natural hot spring, it can be kept clean because it is continuously supplied into the bathtub and overflows the bath water. However, a huge amount of fuel is consumed. For this reason, in warm bath-related facilities that use boiling water as bath water, the bath water is generally circulated and filtered to reduce the load on the boiler.

  For example, there is known a warm bath system in which hot water overflowing from a bathtub is collected in an overflow tank, heated through a boiler while circulating through a filter, and returned to the bathtub (Patent Document 1).

JP 2002-233468 A

  However, according to the warm bath system disclosed in Patent Document 1, while the bath water is circulated and used, the load on the boiler can be reduced and fuel consumption can be reduced. Then, the filtration capacity of the circulatory system is lost, and various germs also propagate. For this reason, it is necessary to periodically replace the bath water. In this case, in Patent Document 1, water or well water is directly heated by a boiler, and the heated water is supplied to the bathtub through the overflow tank. In addition, since water is directly heated by a boiler and supplied from a hot water tank to a washing room currant, etc., the load on the boiler is high and the fuel consumption is enormous.

  The present invention has been made in view of the circumstances as described above, and its main purpose is to efficiently generate hot water to be supplied to the hot bath area using the residual heat of the hot water discharged from the hot bath area including the bathtub. Therefore, it is to promote energy saving in facilities related to hot baths.

In order to achieve the above object, the present invention provides a hot water supply / discharge hot water system and a hot water supply / discharge hot water method as described below.
(1) In a hot water supply / discharge hot water system of a hot water bath-related facility equipped with a hot water supply facility for heating and supplying purified water stored in a water receiving tank to a hot bath area including a bathtub,
A hot water recovery tank for storing hot water from the warm bath area;
Anda preheating means for heating by heat transfer from the exhaust hot water purification the Haiyu recovery tank within the receiving tank, before Sharing, ABS water collection tank, Haiyu discharged from the bottom of the bathtub And a second recovery tank for storing hot water that has overflowed from the bathtub,
The second recovery tank is partitioned into an upstream tank into which the hot water overflowed from the bathtub flows and a downstream tank whose bottom communicates with the upstream tank,
The preheating means is disposed inside the first recovery tank and the upstream tank of the second recovery tank, and purified water is circulated between the preheating means and the water receiving tank. Hot water supply / drainage system in a hot bath-related facility.
(2) feeding Haiyu system in bath-related facilities above relates to (1), characterized by having a chlorine supply means for supplying chlorine to the Haiyu collecting tank.
(3 ) In a warm bath-related facility equipped with a hot water supply facility that heats and supplies purified water stored in a water receiving tank to a warm bath area including a bathtub,
The hot water discharged from the bottom of the bathtub is stored in a first recovery tank having a predetermined volume, and the hot water overflowed from the bathtub is communicated with the upstream tank into which the exhaust hot water flows and the bottom communicates with the upstream tank. Stored in a second recovery tank with a two-tank structure partitioned into a downstream tank,
While circulating and heating the purified water in the water receiving tank between the first recovery tank and a heat exchanger disposed in the upstream tank of the second recovery tank,
A method for supplying and draining hot water in a hot bath-related facility, wherein the purified water heated by heat exchange with the hot water in the first and second recovery tanks is further heated through the hot water supply facility and supplied to the hot bath area. .
( 4 ) With regard to ( 3 ) above, the hot water whose temperature has decreased due to heat exchange with the purified water is externally discharged from the first and second recovery tanks, and the first and second recovery before the external discharge of the hot water A hot water supply / drainage method in a warm bath-related facility characterized by adding an appropriate amount of chlorine to the tank.

  According to the present invention, the remaining heat of the hot water discharged from the bathtub or the like is used to heat the purified water stored in the water receiving tank, and the purified water is further heated and heated through the hot water supply equipment to be supplied to the warm bath area. Therefore, it is possible to reduce the load on the hot water supply equipment (boilers, etc.), save fuel consumed for its operation, and lower the temperature of the hot water, so that it can be discharged into the ocean and rivers. Does not adversely affect the natural environment.

  In addition, since the hot water from the bottom of the bathtub and the overflowed hot water are separately collected, even when the hot water does not flow into the first recovery tank from the bottom of the bathtub in the use time zone of the warm bath area, etc. Purified water can be heated using the overflow hot water flowing into the second recovery tank. When cleaning the warm bath area, etc., the hot water from the bottom of the bathtub flowing into the first recovery tank is used to add purified water. Can be warmed. In particular, preheating means (heat exchange) in which the second recovery tank has a side-by-side two-tank structure in which the bottom part communicates, and the purified water is circulated between the two tanks in the upstream tank into which the overflow waste water flows. Therefore, heat transfer to the purified water can be carried out satisfactorily by keeping hot hot water at the upper part of the upstream tank.

  Furthermore, since it has a chlorine supply means for supplying chlorine into the waste water recovery tank (first and second recovery tanks), even if ammonia nitrogen is contained in the waste water, the waste water is discharged outside the tank. Discontinuous point chlorination can be performed before denitrification to prevent drainage containing high-concentration nitrogen from flowing into the ocean or river.

  Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 shows a specific example of a hot water supply / discharge system in a hot bath related facility according to the present invention. In FIG. 1, reference numeral 1 denotes a hot bath area (a bathroom, particularly a large bath where ten to several tens of people can bathe at one time), which is a main area of a hot bath-related facility, and a plurality of bathtubs 2 ( In addition to the washing place 3 spreading around it), a sauna and an outdoor bath (not shown) are provided. In particular, in this example, the bathtub 2 is filled with a natural hot spring containing ammonia drawn from a source spring.

  Reference numeral 4 denotes a water receiving tank for storing purified water used in the warm bath area 1 (particularly the washing place 3). The water receiving tank 4 is supplied with purified water (for example, well water) drawn from the water source 6 through the filter 5 by the pump P1. ) Is supplied as appropriate.

  7 is a hot water supply facility for converting the purified water stored in the water receiving tank 4 into hot water of about 60 ° C. and supplying the hot water to the warm bath area 1. The hot water supply facility 7 has a boiler 7 A for heating the purified water supplied from the water receiving tank 4. First, it is constituted by a hot water supply tank 7B for storing hot water obtained by the boiler 7A, a hot water supply header 7C connected to the hot water supply tank 7B, and the like. Then, the purified water in the water receiving tank 4 is sent to the boiler 7A by the pump P2, heated to about 60 ° C. by the boiler 7A, and stored in the hot water tank 7B, which is transferred from the hot water tank 7B to the hot water header 7C by the pump P3. It comes to be supplied. The hot water supply header 7C is provided with a plurality of mixing plugs 7D (curan for mixing hot water from a hot water tank and water from a water supply system (not shown)) arranged along the wall surface of the washing place 3, and each of the mixing plugs. By opening 7D, hot water can be supplied to the warm bath area 1 (washing area 3).

  Here, the natural hot spring is supplied from the source as described above into the bathtub 2 in the warm bath area 1, and purified water (boiling water) heated from the hot water supply facility 7 is supplied into the bathtub 2, and this is used as a boiler. You may make it circulate through 7A and the filtration apparatus which is not shown in figure. Note that the hot water in the bathtub 2 can be completely discharged through a drain port 2a provided at the bottom of the bathtub 2 at the time of cleaning or the like, and the discharged hot water overflowing from the bathtub 2 is provided along the outer peripheral edge of the bathtub 2. The hot water recovered through the tub 2b and used in the washing place 3 is discharged from the pit 3a provided in the washing place 3 to the outside of the warm bath area 1 as needed.

  10 is a hot water recovery tank for storing the hot water from the warm bath area 1, and this hot water recovery tank 10 is a recovery tank 11 (first recovery tank) for storing the hot water discharged from the bottom of the bathtub 2. It is comprised by the collection tank 12 (2nd collection tank) which stores the waste water which overflowed from the bathtub 2, and the waste water discharged | emitted from the washing place 3. FIG.

  The collection tank 11 is a heat-resistant structure having a volume equal to or larger than the volume of the bathtub 2, and the inside thereof is communicated with the drain port 2a of the bathtub 2 via the pipe L1. On the other hand, the recovery tank 12 is also a heat-resistant structure having a volume comparable to that of the recovery tank 11, and the inside thereof is communicated with the recovery basket 2b and the pit 3a of the washing place 3 through the pipe L2. In particular, the recovery tank 12 is divided into two by a partition wall W, one of which is in the upstream tank 12A as an upstream tank 12A into which the overflowing hot water from the bathtub 2 and the hot water from the washing place 3 are allowed to flow. One end of the pipe L2 is opened, and the other is a downstream tank 12B adjacent to the upstream tank 12A via a partition wall W. Note that a communication path 12 </ b> C is opened between the partition wall W that partitions the upstream tank 12 </ b> A and the downstream tank 12 </ b> B and the bottom surface of the collection tank 12. That is, the bottom of the upstream tank 12A and the downstream tank 12B communicate with each other, and the hot water flowing into the upstream tank 12A can flow into the downstream tank 12B through the communication path 12C.

  And according to this invention, using the remaining heat of the hot water stored in the hot water recovery tank 10, the purified water supplied to the boiler 7A is warmed in advance, and the fuel used in the boiler 7A is saved while reducing the hot water. The hot water in the collection tank 10 is made low temperature so that it can be discharged into rivers and oceans.

  In FIG. 1, 21 and 22 are heat exchangers (coil types in which titanium pipes are spirally wound) as preheating means for heating purified water in the water receiving tank 4. As is clear from FIG. 1, the heat exchangers 21 and 22 are arranged in the recovery tank 11 constituting the hot water recovery tank 10 and in the upstream tank 12A of the recovery tank 12 so as to be immersed in the hot water, respectively. It has become. And the purified water is circulated between the heat exchangers 21 and 22 and the water receiving tank 4, and when the purified water passes through the heat exchangers 21 and 22, it is heated by heat exchange with the waste water. It is said that.

  Reference numeral 23 denotes a circulation line for circulating purified water between the water receiving tank 4 and the heat exchangers 21 and 22, and the circulation line 23 includes a circulation pump P4 and a heat exchanger 21 on the collection tank 11 side and a recovery line. Control valves V1 and V2 for switching the flow path of purified water to the heat exchanger 22 on the tank 12 side are interposed. That is, when one control valve V1 is opened and the other control valve V2 is closed, purified water is circulated between the heat exchanger 21 and the water receiving tank 4, and one control valve V1 is contrary to the above. Is closed and the other control valve V2 is opened, purified water is circulated between the heat exchanger 22 and the water receiving tank 4.

  In addition, when the temperature of the hot water in the recovery tanks 11 and 12 is lowered by heat exchange with the purified water, the hot water is discharged outside through the drain pipe 24 connected to the bottom of the recovery tanks 11 and 12. An appropriate amount of chlorine is added to the collection tanks 11 and 12. According to this, even when ammonia is contained in the hot water, ammonia and nitrogen can be removed from the hot water by discontinuous point chlorination, and bacteria can also be killed.

  A chlorine storage tank 25 stores chlorine (chlorine water) to be added to the recovery tanks 11 and 12, and the stored chlorine is injected into the recovery tanks 11 and 12 by a pump P5. A neutralizer (slaked lime or the like) is injected into the drain pipe 24 from the neutralizer tank 26 by the pump P6 in order to remove residual chlorine from the denitrified hot water.

  Here, the operation of the system of the present application configured as described above will be described. Natural hot springs are continuously supplied to the bathtub 2 and the hot water overflowed from the bathtub 2 and the hot water used in the washing place 3 are: Recovered from the recovery tank 2b and the pit 3a to the recovery tank 12 through the pipe L2.

  On the other hand, in the water receiving tank 4, purified water is supplied from the water source through the filter 5 by the pump P 1, and this is circulated between the water receiving tank 4 and the heat exchanger 22. As a result, the purified water is heated (for example, heated from 15 ° C. to 21 ° C.), and the temperature of the hot water in the recovery tank 12 is decreased (for example, decreased from 40 ° C. to 25 ° C.). Note that, in the recovery tank 12, the upstream tank 12A side, in particular, the upper part thereof is kept at a high temperature by the hot water continuously supplied from the bathtub 2 and the washing place 3, and the hot water becomes a low temperature by heat exchange with the purified water. Moves to the downstream tank 12B side. Also, the hot water having a low temperature is intermittently discharged from the bottom of the recovery tank 12, and chlorine is supplied each time before the discharge.

  On the other hand, the purified water heated as described above is sent from the water receiving tank 4 to the boiler 7A and further heated to a predetermined temperature (for example, 60 ° C.), which is temporarily stored in the hot water tank 7B. The hot water tank 7B is supplied to the warm bath area 1 through the hot water header 7C, and is used as a shower in the washing area 3 or the like. And the hot water used in the washing place 3 is also collect | recovered by the collection tank 12 from the piping L2 as waste hot water, and it uses for the heating of purified water.

  Next, at the time of cleaning in the warm bath area 1 (for example, from 2:00 to 5:00 am), hot water supply to the bathtub 2 is stopped, and all the hot water in the bathtub 2 is discharged from the drain port 2a. To be recovered. Then, the circulation of the purified water is switched from the heat exchanger 22 side to the heat exchanger 21 side until the purified water is circulated between the water receiving tank 4 and the heat exchanger 21 until the cleaning in the warm bath area 1 is completed. During this period, the heat of the hot water stored in the recovery tank 11 is recovered. Note that the hot water in the recovery tank 11 whose temperature has been lowered due to heat exchange with the purified water is discharged to the outside through the drain pipe 24 at once, but chlorine is added to the recovery tank 11 even before the discharge, Denitrification and sterilization are performed.

  Although the present invention has been described above, it is preferable that the hot water tank 7B and the hot water recovery tank 10 are constructed integrally with the housing of the warm bath-related facility using an underground pit. In particular, as shown in FIG. 2, it is preferable to use a heat insulating panel 30 made of an FRP plate (fiber reinforced plastic plate) or the like as a concrete mold, and use the heat insulating panel 30 as an inner wall of the hot water supply tank 7B or the hot water recovery tank 10 as it is. According to this, it is possible to easily construct a large-capacity, high-insulation hot water supply tank 7B and a waste water recovery tank 10 at low cost.

The conceptual diagram which shows the hot-water supply system in the hot-bath related facility which concerns on this invention Sectional view of hot water tank and waste water recovery tank that make up the system

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Warm bath area 2 Bathtub 3 Washing place 4 Receiving tank 7 Hot water supply equipment 10 Waste hot water collection tank 11 1st collection tank 12 2nd collection tank 12A Upstream tank 12B Downstream tank 21 Heat exchanger (preheating means)
22 Heat exchanger (preheating means)
25 Chlorine storage tank (chlorine supply means)

Claims (4)

In the hot water supply / discharge hot water system of a hot bath related facility equipped with a hot water supply facility for heating and supplying purified water stored in the water receiving tank to the hot bath area including the bathtub,
A hot water recovery tank for storing hot water from the warm bath area;
The purified water in the receiving tank have a, a preheating means for heating by heat transfer from the exhaust water of the Haiyu collecting tank,
The hot water recovery tank has a first recovery tank that stores the hot water discharged from the bottom of the bathtub, and a second recovery tank that stores the hot water overflowed from the bathtub,
The second recovery tank is partitioned into an upstream tank into which the hot water overflowed from the bathtub flows and a downstream tank whose bottom communicates with the upstream tank,
The preheating means is disposed inside the first recovery tank and the upstream tank of the second recovery tank, and purified water is circulated between the preheating means and the water receiving tank. Hot water supply / drainage system in a hot bath-related facility. Feeding Haiyu system in bath facilities according to claim 1, characterized in that it comprises a chlorine supply means for supplying chlorine to the Haiyu collection tank. In warm bath-related facilities equipped with hot water supply facilities that heat and supply purified water stored in the water receiving tank to the warm bath area including the bathtub,
The hot water discharged from the bottom of the bathtub is stored in a first recovery tank having a predetermined volume, and the hot water overflowed from the bathtub is communicated with the upstream tank into which the waste hot water flows and the bottom communicates with the upstream tank. Stored in a second recovery tank with a two-tank structure partitioned into a downstream tank,
While circulating and heating the purified water in the water receiving tank between the first recovery tank and a heat exchanger disposed in the upstream tank of the second recovery tank,
A method for supplying and draining hot water in a hot bath-related facility, wherein the purified water heated by heat exchange with the hot water in the first and second recovery tanks is further heated through the hot water supply facility and supplied to the hot bath area. . Exhaust hot water whose temperature has decreased due to heat exchange with the purified water is discharged from the first and second recovery tanks, and an appropriate amount of chlorine is added to the first and second recovery tanks before the discharged hot water is discharged to the outside. The hot water supply and discharge method in the hot bath related facility according to claim 3 .

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