JPH10267210A - Steam generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the breakage of a drain pipe and the clogging with scale by a method wherein a drain tank for storing water at a low temperature is provided and high temperature residual water after the generation of steam is fed into the tank to make the water lowered in temperature overflow from an overflow port. SOLUTION: When the operation of a heater 4 of a steam generator 1 is stopped, a drain valve 6 is opened. Then, high temperature storage water 3 in a boiling body 2 flows into a drain tank 10 through a drain pipe 7. The low temperature storage water 11, which is lowered in temperature as drained with the operation of generating steam is already accumulated in the drain tank 10. The storage water 11 in the drain tank 10 is mixed with the high temperature storage water 3 in the boiling body 2 to lower the temperature of drainage. Then, the storage water overflowed in the drain tank 10 is discharged to a drain pipe 13 from a drain pipe 12 connected to a side of the drain tank 10. Thus, the temperature of a high temperature drain from the boiling body 2 is lowered thereby enabling prevention of the destruction of the drain pipe 13 under a high temperature.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steam generator for generating steam used for steam bathing, humidifying air conditioning, wet drying, a steamer, and the like, and more particularly to a drainage structure of residual water used for the steam generation. .

[0002]

2. Description of the Related Art FIG. 5 shows a configuration diagram and a drainage structure of a conventional steam generator. In the conventional steam generator, when the heating of the steam generating canister 2 is completed, the ball valve 6 of the drain circuit is opened, and the water stored in the can 2 as remaining water after the steam generation is drained. 5, ball valve 6, drain pipe 7, drain pipe 8
It was structured to be drained.

[0003]

In such a drainage structure, since the water 3 in the can 2 is directly discharged to the drainage pipe 8, the following problem occurs.

[0004] 1. Since the scale deposited inside the can body 2 due to the generation of steam and the scale component contained in the drainage flow directly into the drainage pipe 8, the scale deposited in the drainage pipe 8 becomes a scale piece and adheres to the drainage pipe 8. Then, clogging of the drain pipe 8 occurs.

[0005] 2. Since the high-temperature storage water 3 inside the can 2 after the steam is generated is directly discharged to the drain pipe 8, when the drain pipe 8 is made of a non-heat-resistant material such as vinyl chloride, the drain pipe 8 is thermally damaged. Occurs.

[0006] The present invention solves the above-mentioned problems, and the scale and high-temperature water generated by heating steam generation water are:
This prevents the drainage pipe from draining directly from the device and maintains the original function of the drainage pipe.

[0007]

Therefore, in order to solve the above-mentioned problems, the present invention does not directly discharge the wastewater of a steam generator to a drain pipe, but instead discharges the wastewater of the can body downstream of the steam generation can body. Set up a drainage tank that stores cold water at the same amount or more,
The drainage tank is provided with a drainage pipe for discharging high-temperature residual water after the generation of steam into the drainage tank and overflowing water from the overflow port provided in the drainage tank to drain the water.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the first means of the present invention, a drainage tank for storing low-temperature water equal to or more than the amount of water discharged from the can body is connected downstream of the steam generation can body. The drainage overflows from the overflow port and flows into the drainpipe.

In the above-mentioned first means, the wastewater is temporarily stored in a drainage tank and its overflow is drained, so that the scale pieces and scale components discharged from the steam generating can body are settled and stored in the drainage tank. Scale clogging can be prevented by reducing the amount of scale pieces and scale components flowing into the drain pipe.

[0010] Further, since the waste water which has been accumulated in a drain tank in advance and is naturally radiated during operation suspension to lower the temperature and the newly discharged high temperature waste water are mixed to lower the temperature and the overflow thereof is drained, a drain pipe is provided. The temperature of the drainage flowing through the drainage pipe can be reduced, and thermal damage to the drainage pipe due to high-temperature water can be prevented. In addition, the low-temperature action of the mixing can promote the precipitation of scale components, and can reduce the amount of scale components flowing out to a drain pipe.

According to the second means of the present invention, in the drain tank described in the first means, drain water overflowed through a drain pipe to a position distant from a drain inlet which is a connection port of the can body to the drain tank is drained. It is configured to flow to.

Then, the water dropped from the discharge opening of the drain inlet to the water stop surface is mixed with the water stored in the drain tank and diffuses, and flows toward the overflow inlet of the drain pipe away from the drop point.

Further, since the flow is reversed near the overflow inlet and enters the drain pipe, the flow closest to the drain pipe at the water stop surface is prevented from flowing into the reverse flow near the overflow inlet and once bypasses the reverse flow. Therefore, the diffusion rate of the storage water in the storage water is increased, and the temperature is further reduced, so that the scale component removal rate can be increased.

According to the third means of the present invention, a partition is provided inside the drainage tank described in the first means to divide the water into two parts, and the drainage is drained to one of the partitions. Is configured to drain water from a hole provided in the partition side surface.

[0015] According to this configuration, when the overflow overflows the weir, it is cooled by contact with the surrounding air, so that it is possible to expect a lower temperature of the waste water and an increase in the amount of scale components deposited.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 shows Embodiment 1 of the present invention. As shown in FIG. 1, when the operation of the heating device 4 of the steam generator 1 is stopped, the drain valve 6 changes from the “closed” state to the “open” state. Then, the high-temperature storage water 3 in the can 2 which has been heated by the heating device 4 and has discharged steam from the discharge port 2 a flows into the drain tank 10 through the drain pipe 5, the drain valve 6, and the drain pipe 7. . In the drainage tank 10, low-temperature water 11 that has been drained and lowered in temperature by the previous operation of generating steam has already been stored.

The amount of the water stored in the reservoir 11 is set to be equal to or greater than the amount of water discharged from the can 2 of the steam generator 1 by the drain pipe 12 provided in the drain tank 10. Then, the water storage 11 in the drainage tank 10 and the high-temperature water storage 3 in the can body 2 are mixed to reduce the temperature of the drainage water.

Next, the water stored in the drain tank 10 overflows to the drain pipe 1 connected to the side of the drain tank 10.
2 to drain 13.

As described above, according to the steam generator 1 of the first embodiment of the present invention, it is possible to prevent the drainage pipe 13 from being damaged at high temperature by reducing the temperature of the high-temperature drainage from the can 2.

Further, the scale pieces that have precipitated in the can body 2 and flowed out simultaneously with the drainage are stored in the drainage tank 10 so that the drain pipe 13 can be prevented from being clogged by the scale pieces.

(Embodiment 2) As shown in FIG. 2, in Embodiment 2, portions having the same construction and the same function as Embodiment 1 are denoted by the same reference numerals, and detailed description thereof will be omitted. This will be mainly described. When the operation of the heating device 4 of the steam generator 1 is stopped, the drain valve 6 changes from the “closed” state to the “open” state. And the high temperature water 3 in the can 2
It flows into the drain tank 10a through the drain valve 6 and the drain pipe 7. In the drainage tank 10a, there is already stored water 11 which has been drained and cooled to a low temperature in the previous operation. Then, the water storage 11 in the drainage tank 10a and the high-temperature water storage 3 in the can body 2 are mixed to reduce the temperature of the wastewater.

Next, the overflowed water in the drainage tank 10a is extended from the side of the drainage tank 10a to the inside, and is separated from the connection port 7a of the drainage pipe 7 through an overflow port 12b opened in a different direction through the drainage pipe 12a. Drain pipe 13
Drained to

As described above, the purpose of the second embodiment of the present invention is to provide a more effective mixing of waste water than the first embodiment.

That is, by using the drainage pipe 12a extended into the drainage tank 10a to flow the overflowed drainage to the drainage pipe 13, a short circuit is prevented and sufficient mixing is performed. The temperature of the high-temperature wastewater can be reduced.

(Embodiment 3) As shown in FIGS. 3 and 4, in Embodiment 3, parts having the same construction and the same function as those of the embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. The different parts will be mainly described. Heating device 4 of steam generator 1
Is stopped, the drain valve 6 changes from the "closed" state to the "open" state.
State. Then, the high-temperature storage water 3 in the can body 2 flows into the drain tank 10b through the drain pipe 5, the drain valve 6, and the drain pipe 7. The inside of the drainage tank 10 b is divided by a partition plate 18 into two parts, a drainage tank 19 and an overflow tank 20. Inside the drainage tank 19 and the overflow tank 20, the storage water 14 that has been drained and cooled down in the previous operation,
The reservoir 15 has accumulated. Then, the water storage 14 in the drainage tank 19 and the high-temperature water storage 3 in the can 2 are mixed to lower the temperature of the drainage water.

Next, the water mixed in the drainage tank 19 and overflowing as shown by the arrow is stored in the overflow tank 2.
0, is further mixed with the water storage 15, and is discharged to the drain pipe 17 through the drain pipe 16 on the side surface of the overflow tank 20.

As described above, in the steam generator 1 according to the third embodiment of the present invention, it is an object to separate the scale pieces and mix the wastewater more effectively than in the first embodiment.

That is, by dividing the inside of the drain tank 10b into two tanks, the scale pieces that could not be separated in the drain tank 19 can be separated in the overflow tank 20.

Further, by providing the partition plate 12 so as to have a sufficient overflow length,
This enables more effective mixing.

Further, by providing the overflow tank 20, mixing of the waste water is performed again, so that the temperature of the waste water can be further reduced.

[0032]

As is apparent from the above description, according to the present invention, it is possible to effectively prevent damage to the drain pipe and clogging of the drain pipe due to high-temperature drainage discharged from the steam generator and scale pieces.

In particular, in the first aspect of the present invention, high-temperature wastewater from a steam generating can body is mixed with low-temperature water already stored in a drainage tank, and only overflowed wastewater flows into a drain pipe. Therefore, the temperature of the high-temperature drainage can be reduced to prevent high-temperature damage of the drainage pipe.

The scale pieces deposited in the steam generator and discharged simultaneously with the drainage are stored in the drainage tank, so that the drainage pipe can be prevented from being clogged by the scale.

According to the second aspect of the present invention, the water overflowed from the drainage tank flows the overflowed drainage through a drainage pipe extended from the side of the drainage tank into the drainage tank. By preventing the circuit and performing sufficient mixing, it is possible to more effectively reduce the temperature of the high-temperature drainage from the steam generating can body.

According to the third aspect of the invention, by dividing the inside of the drainage tank into a drainage tank and an overflow tank, scale pieces that cannot be separated in the drainage tank can be separated in the overflow tank. Road clogging can be prevented more effectively.

Further, since the drain tank is provided so as to have a sufficient overflow length by providing a partition for dividing the drain tank into an overflow tank and an overflow tank, effective mixing can be performed to reduce the drain temperature. it can.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a first embodiment of a steam generator according to the present invention.

FIG. 2 is a configuration diagram showing a second embodiment of the apparatus.

FIG. 3 is a configuration diagram showing a third embodiment of the apparatus.

FIG. 4 is a configuration diagram of the right side surface of FIG. 3;

FIG. 5 is a configuration diagram showing a conventional steam generator.

[Explanation of symbols]

 2 Can 4 Heating device 10, 10a, 10b Drain tank 12, 12a, 13, 17 Drain pipe 18 Partition 19 Drain tank 20 Overflow tank

Claims (3)

[Claims] 1. A can body for generating steam, a drainage tank containing room-temperature storage water equal to or larger than the wastewater mixed with wastewater from the canbody, and an overflow of the drainage tank is provided at an overflow port above the tank bottom. A steam generator configured to drain water to a drain pipe that is open at the bottom. 2. The steam generator according to claim 1, wherein a drain pipe is provided in the drain tank, the drain pipe extending from the side of the tank and opened, and the overflow is drained out of the tank through the drain pipe. 3. The drain tank according to claim 1, wherein a partition is provided inside the drain tank, a drain tank and an overflow tank communicating with the drain tank via the partition are formed, and the drain tank and the overflow tank are drained in this order. Steam generator.