JP2014114978A - High temperature water generation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To supply a user with high temperature water as a heat source and to appropriately recover the supplied high temperature water.SOLUTION: A high temperature water generation device 1 generates high temperature water using steam generated by a boiler 10 and supplies the generated high temperature water to a loading device 30. The high temperature water generation device 1 generates the high temperature water with pressure higher than saturated steam pressure in a hot-water tank 20 storing hot water by independently pressurizing and heating the hot water in a manner that supplies pressurizing steam to a gas phase section of the hot-water tank 20 and supplies heating steam to a liquid phase section thereof. The high temperature water generation device 1 supplies the high temperature water to the loading device 30 and uses the same as water supply to the boiler 10.

Description

  The present invention relates to a high-temperature water generator that generates high-temperature water using a steam boiler.

  Boilers that generate steam and hot water by heating a water pipe are widely known, and are used in various facilities such as hospitals, schools, factories, and public baths. Generally, hot water is supplied to a user who uses a heat source lower than 100 ° C., and steam is supplied to a user who uses a heat source higher than 100 ° C.

Here, the steam used as a heat source is recovered as drain, but attempts to effectively use the heat (sensible heat) held by the drain are also widely performed. A closed-type drain recovery system that recovers in a high-pressure state and supplies the recovered drain to a boiler is disclosed.
In such a closed-type drain recovery system, water can be supplied to the boiler at a high temperature, so that the fuel consumption of the boiler can be reduced and the operating cost of the boiler can be reduced. Moreover, since the pressure difference with a boiler can be made small by keeping the pressure inside a drain collection | recovery tank high, the motive power which drives the feed water pump used when supplying water to a boiler from a drain collection | recovery tank can be reduced.

JP 2006-105442 A

By the way, depending on a user, supply of warm water may be desired as a heat source exceeding 100 degreeC. Such hot water exceeding 100 ° C. has high heat even after being used as a heat source in the same manner as steam, and therefore it is preferable to collect and reuse, but in order to recover and reuse the supplied hot water, Further ingenuity is required.
That is, in order to generate hot water exceeding 100 ° C. (hereinafter referred to as “hot water”), it is necessary to heat the water while pressurizing it. Will be generated. At this time, if the pressure applied to the high-temperature water falls below the saturated vapor pressure of the retained water temperature of the recovery system, flash steam will be generated in the entire retained water during recovery, causing major obstacles such as pump air biting. End up.

  This invention is made in view of such a problem, and it aims at providing the high temperature water production | generation apparatus which collect | recovers the supplied high temperature water appropriately while supplying high temperature water as a heat source with respect to a user. To do.

  The present invention is a high-temperature water generating device that generates high-temperature water using steam generated by a steam boiler and supplies the generated high-temperature water to a load device, the hot-water tank storing hot water, and the steam boiler And the hot water tank are connected, a pressurization line for supplying steam to the gas phase part of the hot water tank, the steam boiler and the hot water tank are connected, and steam is supplied to the liquid phase part of the hot water tank The present invention relates to a high-temperature water generating apparatus including a heating line, a hot water tank that connects the hot water tank and the steam boiler, and a water supply line that supplies hot water stored in the hot water tank to the steam boiler.

  Further, in the high-temperature water generating device, an adjustment tank that is arranged downstream of the hot water tank and to which hot water stored in the hot water tank is transferred is connected to the hot water tank and the adjustment tank, and stored in the hot water tank. A water level adjustment line for supplying the heated water to the adjustment tank, and a hot water return line for connecting the hot water tank and the adjustment tank and supplying the hot water stored in the adjustment tank to the hot water tank. It is preferable to provide.

  Further, in the high-temperature water generating device, a water level detection unit that detects a water level of hot water stored in the hot water tank, an on-off valve provided in the water level adjustment line, and the water level detection unit detects a water level that exceeds a predetermined level. It is preferable to further include a water level control unit that opens the on-off valve on condition that the on-off valve is opened.

  More preferably, the water level control unit supplies hot water from the adjustment tank to the hot water tank via the hot water return line on condition that the water level detection unit detects a water level below a predetermined level.

  In the high-temperature water generator, the hot water tank is connected to the load device, and the high-temperature water is supplied from the hot water tank to the load device and the high-temperature water supplied to the load device is returned to the hot water tank. And a connection part of the water supply line to the hot water tank, a connection part of the hot water return line to the hot water tank, and / or the hot water tank downstream of the load circulation line. It is preferable to arrange | position in the vicinity of the connection part.

  Further, in the high-temperature water generating device, a temperature detection unit that detects the temperature of the high-temperature water supplied to the load device, and the temperature detection unit supplies the temperature to the hot water tank from the heating line based on the temperature detected by the temperature detection unit. It is preferable to further include a water temperature control unit that controls the amount of steam.

  In the high-temperature water generator, the pressure of the steam is such that the steam supplied to the gas phase section has a pressure exceeding the saturation vapor pressure necessary for generating the high-temperature water in the pressurizing line. It is preferable that a steam pressure adjusting unit for adjusting the pressure is provided.

  ADVANTAGE OF THE INVENTION According to this invention, while supplying high temperature water as a heat source with respect to a user, the high temperature water production | generation apparatus which collect | recovers the supplied high temperature water appropriately can be provided.

It is a figure which shows the structure of the high temperature water production | generation apparatus which concerns on one Embodiment of this invention. It is the schematic which shows the structure of the warm water tank in the said embodiment. It is a graph which shows the relationship between the pressure of a warm water tank, and the steam for pressurization.

  Hereinafter, preferred embodiments of the high-temperature water generator of the present invention will be described with reference to the drawings. The high-temperature water generator of this embodiment generates hot water (high-temperature water) exceeding 100 ° C. by supplying steam generated from a boiler to a sealed tank having pressure resistance, and supplies it to a load device as a heat source. To do. The high-temperature water generator also functions as a closed-type drain recovery system, recovers high-temperature water supplied to the load equipment in a high-temperature and high-pressure state, and reuses it as boiler feed water.

First, with reference to FIG. 1, the whole structure of the high-temperature-water production | generation apparatus 1 of this embodiment is demonstrated. In the following description, “line” is a general term for a flow path, a path, a pipeline, and the like.
The high temperature water generator 1 includes a boiler 10, a hot water tank 20, and an adjustment tank 40, and supplies high temperature water to the load device 30.

  Moreover, the high-temperature water generator 1 connects these devices, a plurality of lines through which steam or water flows, a plurality of valves that open and close the plurality of lines, and a plurality of lines through which water flows through the plurality of lines. A pump, a plurality of detection units for detecting various states in the plurality of lines and the like, and a control unit 8 for controlling operations of the plurality of valves and the like are provided.

  Specifically, the high-temperature water generator 1 includes a pressurization line L1, a heating line L2, a load circulation line L3, a water level adjustment line L4, a hot water return line L5, and a water supply line L6. And comprising. Moreover, the high temperature water production | generation apparatus 1 is provided with the pressurized steam supply valve 51, the heating steam supply valve 52, the water level adjustment valve 53, and the non-return valve 54 as a valve. The high-temperature water generator 1 includes a load circulation pump 61, a hot water return pump 62, and a feed water pump 63 as a plurality of pumps. Moreover, the high temperature water production | generation apparatus 1 is provided with the water level sensor LS71 and temperature sensor TH72 as a detection part.

The boiler 10 includes a plurality of can bodies 11 that generate steam, a steam header 12 that collects steam generated by the plurality of can bodies 11, and a connecting pipe 13 that connects the plurality of can bodies 11 and the steam header 12. And a steam boiler provided with.
The plurality of can bodies 11 generate steam by heating the water supplied to these can bodies 11. Steam generated in the plurality of cans 11 is supplied to the steam header 12 through the connecting pipe 13. Further, the boiler 10 is not limited to the plurality of cans 11 and may be a single can 11.

The hot water tank 20 is configured by a pressure vessel that has pressure resistance and can be sealed, and stores hot water (hot water) supplied to the load device. The hot water stored in the hot water tank 20 is heated while being pressurized by the steam supplied from the boiler 10 and rises to a temperature exceeding 100 ° C. In the present embodiment, high-temperature water at 130 ° C. is used in the load device 30, and therefore high-temperature water at 130 ° C. is generated in the hot water tank 20.
The warm water tank 20 is provided with a water level sensor LS71 (water level detection unit) that detects the level of warm water (high temperature water) stored in the warm water tank 20. The water level sensor LS71 is communicably connected to the control unit 8 and transmits the detected water level to the control unit 8.

  The load device 30 uses the high-temperature water stored in the hot water tank 20 as a heat source, and performs heat exchange with the object to be heated.

  The adjustment tank 40 is an open tank disposed downstream of the hot water tank 20, and hot water (hot water) stored in the hot water tank 20 is transferred to the adjustment tank 40. By transferring warm water to the adjustment tank 40, the water level inside the warm water tank 20 is adjusted.

The pressurizing line L <b> 1 connects the steam header 12 and the hot water tank 20, and supplies the steam generated in the boiler 10 to the hot water tank 20. Here, as shown in FIG. 2, the pressurizing line L <b> 1 is connected to the gas phase part 21 of the hot water tank 20 and supplies steam to the gas phase part 21. That is, the steam supplied from the pressurizing line L1 to the hot water tank 20 is used to increase the pressure in the gas phase portion of the hot water tank 20.
Returning to FIG. 1, the pressurized line L1 is provided with a pressurized steam supply valve 51 as a steam pressure adjusting unit. The pressurized steam supply valve 51 is a valve that depressurizes the steam supplied to the hot water tank 20 to a predetermined pressure. Although details will be described later, in the present embodiment, the pressurized steam supply valve 51 is configured so that steam having a pressure exceeding the saturated steam pressure of the high-temperature water generated in the hot water tank 20 is supplied to the gas phase portion of the hot water tank 20. Next, the steam generated from the boiler 10 is decompressed. Specifically, when the high-temperature water generated in the hot water tank 20 is 130 ° C., the saturated steam pressure is 1.8 kg / cm 2 G in terms of gauge pressure, so the pressurized steam supply valve 51 is 1.8 kg / cm 2 G or more. The steam generated from the boiler 10 is reduced to a pressure of
The temperature of the hot water stored in the hot water tank 20 rises above 100 ° C. by supplying steam having a pressure equal to or higher than the saturated vapor pressure to the gas phase portion of the hot water tank 20 via the pressurizing line L1.

The heating line L <b> 2 connects the steam header 12 and the hot water tank 20, and supplies the steam generated in the boiler 10 to the hot water tank 20. As shown in FIG. 2, four steam nozzles 91, 92, 93, and 94 are provided in the heating line L <b> 2 so as to be positioned in the warm water stored in the warm water tank 20. Steam generated in the boiler 10 is supplied from these steam nozzles 91 to 94 to the hot water tank 20. That is, the steam supplied from the heating line L2 to the hot water tank 20 is supplied to the liquid phase part of the hot water tank 20 and used for heating the hot water (hot water) in the hot water tank 20.
Returning to FIG. 1, a heating steam supply valve 52 is provided in the heating line L2. The heated steam supply valve 52 is communicably connected to the control unit 8, and adjusts the flow rate of steam blown from the steam nozzles 91 to 94 into the hot water tank 20 under the control of the control unit 8.

The load circulation line L3 connects the hot water tank 20 and the load device 30 and circulates high-temperature water (hot water) between the hot water tank 20 and the load device 30. That is, the load circulation line L3 supplies the hot water generated in the hot water tank 20 to the load device 30 and also supplies the hot water (hot water) used as a heat source in the load device 30 to the hot water tank 20 again. To do.
A load circulation pump 61 is disposed in the load circulation line L3. The load circulation pump 61 boosts the high-temperature water stored in the hot water tank 20 and supplies it to the load device 30.
A temperature sensor TH72 (temperature detection unit) that detects the temperature of the high-temperature water supplied to the load device 30 is provided upstream of the load device 30 in the load circulation line L3. The temperature sensor TH72 is communicably connected to the control unit 8 and transmits the detected temperature to the control unit 8.

The water level adjustment line L <b> 4 connects the hot water tank 20 and the adjustment tank 40, and supplies hot water (hot water) stored in the hot water tank 20 to the adjustment tank 40. A water level adjusting valve 53 is provided in the water level adjusting line L4. The water level adjustment valve 53 is communicably connected to the control unit 8 and adjusts the water level of the hot water tank 20 by adjusting the flow rate of hot water (high temperature water) transferred to the adjustment tank 40 under the control of the control unit 8 ( descend.
The warm water return line L5 connects the adjustment tank 40 and the warm water tank 20, and supplies the warm water stored in the regulation tank 40 to the warm water tank 20. A warm water return pump 62 is disposed in the warm water return line L5. The hot water return pump 62 is communicably connected to the control unit 8, and boosts the hot water stored in the adjustment tank 40 and supplies it to the hot water tank 20 under the control of the control unit 8. A check valve 64 is disposed between the hot water return pump 62 and the hot water tank 20 in the hot water return line L5. The check valve 64 is a valve that allows the fluid to flow only in the direction from the hot water return pump 62 toward the hot water tank 20.

The water supply line L <b> 6 connects the hot water tank 20 and the boiler 10, and supplies hot water (hot water) stored in the hot water tank 20 to the boiler 10. Here, as shown in FIG. 2, the connection part of the water supply line L6 with the hot water tank 20 is connected to the connection part of the hot water tank 20 on the downstream side of the load circulation line L3 and the hot water tank 20 of the hot water return line L5. It is preferable to be located in the vicinity of either one or both of the two connecting portions of the connecting portion. Hot water (hot water) used as a heat source in the load device 30 is supplied from the connection portion with the hot water tank 20 on the downstream side of the load circulation line L3, and from the connection portion with the hot water tank 20 in the hot water return line L5. Since hot water stored in the adjustment tank 40 is supplied, hot water having a temperature lower than that of the high-temperature water generated in the hot-water tank 20 is supplied from both the connecting portions. Therefore, the temperature of the hot water stored in the hot water tank 20 can be maintained by connecting the water supply line L6 and the hot water tank 20 so that such low temperature hot water is returned to the boiler 10 with priority. Steam for heating can be suppressed. Moreover, since low temperature warm water flows into a economizer (illustration omitted), there also exists an effect which improves boiler efficiency.
Returning to FIG. 1, the water supply pump 63 is arrange | positioned at the water supply line L6. The feed water pump 63 pressurizes the hot water stored in the hot water tank 20 and supplies it to the boiler 10.

  Based on the signal from the boiler 10, the water level detected by the water level sensor LS71, and the temperature detected by the temperature sensor TH72, the control unit 8 controls the water level adjustment valve 53, the hot water return pump 62, and the heating steam supply valve 52. Control the opening and closing of the. The control unit 8 includes a water level control unit 81 and a water temperature control unit 82.

The water level control unit 81 controls the water level adjustment valve 53 and the hot water return pump 62 based on the water level detected by the water level sensor LS71.
Here, the system excluding the adjustment tank 40, that is, the system configured by the boiler 10, the hot water tank 20, and the load device 30 is a sealed system, and the amount of water held by the system is basically substantially constant. . In such a sealed system, the hot water tank 20 is heated to 130 ° C. while pressurizing the stored hot water, but the volume of water expands as the temperature rises. It is necessary to let go of the amount.
Therefore, when the water level detected by the water level sensor LS71 exceeds the first water level that is higher than the reference water level, the water level control unit 81 opens the water level adjustment valve 53 and adjusts the hot water (hot water) in the hot water tank 20 to the adjustment tank. 40. The water level adjustment valve 53 may be arbitrarily closed, and the water level control unit 81 may close the water level adjustment valve 53 after opening the water level adjustment valve 53 for a certain period of time, or the water level detected by the water level sensor LS71. The water level adjustment valve 53 may be closed when it falls below the reference water level.
Further, when the water level detected by the water level sensor LS71 falls below the second water level that is lower than the reference water level, the water level control unit 81 drives the hot water return pump 62 to supply hot water to the hot water tank 20. The hot water return pump 62 may be arbitrarily stopped. The water level controller 81 may stop the hot water return pump 62 according to the drive time, and may be detected by the water level sensor LS71. When the water level exceeds the reference water level, the hot water return pump 62 may be stopped.
The reference water level, the first water level, and the second water level can be arbitrarily set based on various information such as the amount of high-temperature water required by the load device 30 and the durability against the pressure increase of the hot water tank 20. .

  The water temperature control unit 82 controls the heating steam supply valve 52 based on the temperature detected by the temperature sensor TH72. That is, the water temperature control unit 82 adjusts the opening degree of the heating steam supply valve 52 so that the temperature detected by the temperature sensor TH72 becomes a predetermined temperature (130 ° C. in this embodiment). More specifically, when the temperature detected by the temperature sensor TH72 is less than 130 ° C., the water temperature control unit 82 increases the opening of the heating steam supply valve 52 and supplies it to the hot water tank 20 for heating. Increase the steam. In addition, when the temperature detected by the temperature sensor TH72 exceeds 130 ° C., the water temperature control unit 82 reduces or closes the opening degree of the heating steam supply valve 52 and supplies the heating steam supplied to the hot water tank 20. Reduce or stop steam supply.

Next, a specific operation of the high-temperature water generator 1 according to this embodiment will be described.
In the high-temperature water generator 1, steam generated from the boiler 10 is supplied to the hot water tank 20 using the pressurization line L1 and the heating line L2. That is, pressurization steam for increasing the pressure in the gas phase portion of the hot water tank 20 is supplied from the pressurization line L1, and heating for heating the hot water stored in the hot water tank 20 is supplied from the heating line L2. Steam is supplied.

Here, when only the steam for heating is supplied to the hot water tank 20 and the hot water stored in the hot water tank 20 continues to be heated, the stored hot water evaporates and the pressure in the gas phase increases, resulting in the hot water High temperature water exceeding 100 ° C. can be generated in the tank 20. However, the pressure in the gas phase part only rises up to the saturated vapor pressure of the produced high-temperature water, and the high-temperature water may boil when the pressure applied to the high-temperature water decreases.
In this respect, in the high-temperature water generating apparatus 1 of the present embodiment, the pressure in the gas phase portion should be generated by supplying the pressure steam separately from the heating steam to the gas phase portion of the hot water tank 20. It can be controlled separately from the saturated vapor pressure of hot water. More specifically, in the high-temperature water generator 1, the steam for heating is supplied to the gas phase portion so that the pressure of the gas phase portion is equal to or higher than the saturated vapor pressure of the high-temperature water to be generated. Even when the pressure applied to the water is reduced, it is possible to prevent the hot water from boiling immediately.
At this time, the pressure equal to or higher than the saturated vapor pressure can be set as appropriate, but is preferably set in consideration of the control fluctuation width. In this embodiment, the saturated steam having a temperature of + 20 ° C. of the temperature of the high-temperature water to be generated The pressure is to be set. Specifically, when producing high-temperature water at 130 ° C., the pressure in the gas phase is set so that the saturated vapor pressure of high-temperature water at 150 ° C. (4.0 kg / cm 2 G in gauge pressure).

In addition, the hot water in the hot water tank 20 expands in volume by being heated, but since the hot water that is a liquid is an incompressible fluid, the pressure in the hot water tank 20 rapidly increases with the volume expansion. There is a risk that. In this regard, in the high-temperature water generating apparatus 1 of the present embodiment, the hot water tank 20 is provided with not only the liquid phase part but also the gas phase part, so that the volume expansion of the hot water can be absorbed by the gas phase part. it can.
In addition, in the high-temperature water generating apparatus 1 of the present embodiment, adjustment is performed separately from the hot water tank 20 in order to prevent the equipment from being damaged when the pressure rises to such an extent that it cannot be absorbed by the gas phase portion. A tank 40 is provided, and hot water corresponding to the volume expansion is transferred to the adjustment tank 40.
More specifically, when the water level in the hot water tank 20 rises, the water level adjustment valve 53 is opened, and the warm water (hot water) corresponding to the rise in the water level is allowed to escape from the hot water tank 20 to the adjustment tank 40. Thereby, the pressure rise accompanying volume expansion can be suppressed and it can prevent that an installation will be damaged. In addition, in the high temperature water production | generation apparatus 1, when the water level in the warm water tank 20 falls, it is good also as returning warm water from the adjustment tank 40 to the warm water tank 20. FIG. Thereby, the amount of water held by the high-temperature water generator 1 can be kept constant, and stable operation can be performed.
Of course, when a large-capacity tank that does not increase the pressure in the hot water tank 20 even if the volume of the hot water expands is used, it is not necessary to release the hot water (hot water) for the expanded amount. In such a case, the adjustment tank 40 need not be provided.

  Moreover, in the high temperature water production | generation apparatus 1, the connection part with the hot water tank 20 of the downstream of the load circulation line L3, and the connection part with the hot water tank 20 of the water supply line L6 for supplying water to the boiler 10, and a warm water return line It arrange | positions in the vicinity of either one or both of the two connection parts of the connection part with the hot water tank 20 of L5, and uses it for the water supply of the boiler 10 preferentially from the low temperature warm water supplied from these both connection parts. Thereby, the temperature of the high temperature water stored in the warm water tank 20 can be maintained, and the steam for heating can be suppressed. Moreover, since low temperature warm water flows into a economizer (illustration omitted), there also exists an effect which improves boiler efficiency.

  Moreover, in the high temperature water production | generation apparatus 1, based on the temperature of the high temperature water supplied to the load apparatus 30, the opening degree of the heating steam supply valve 52 is adjusted, and heating steam supplied to the hot water tank 20 is adjusted. Yes. Specifically, the steam is reduced when the temperature of the high-temperature water is too high, and the steam is increased when the temperature of the high-temperature water is too low. Thereby, while being able to supply the high temperature water of suitable temperature to the load apparatus 30, it can prevent that temperature rises to the pressure of a gaseous-phase part, and can improve safety | security. Of course, when the temperature of the high-temperature water is too high, the heating steam supply valve 52 may be closed and the supply of the heating steam to the hot water tank 20 may be stopped.

  As mentioned above, although preferable embodiment of the high-temperature-water production | generation apparatus of this invention was described, this invention is not restrict | limited to embodiment mentioned above and can change suitably.

For example, in the above embodiment, a pressure reducing valve that can be mechanically pressure controlled by itself is used as the pressurized steam supply valve 51, but the present invention is not limited to this, and the opening degree is controlled under the control of the control unit 8. It is good also as using the motor valve (control valve) to adjust. In this case, the hot water tank 20 is preferably provided with a pressure sensor that detects the pressure in the gas phase portion. And the control part 8 compares the pressure detected by the pressure sensor, and target pressure, and controls opening and closing of a motor valve. The control of the motor valve by the control unit 8 may be performed by controlling the motor valve with two values of opening / closing (opening / closing control), and may adjust the opening of the motor valve (opening adjustment control). ). Preferably, the opening degree adjustment control is used in which the fluctuation of the pressure in the gas phase is smaller than the opening / closing control.
When the motor valve is controlled by the open / close control, as shown in FIG. 3A, the motor valve is fully opened until the pressure in the gas phase reaches the target pressure P1 set on the upper side of the target pressure zone. After that, when the target pressure P1 is reached, the control unit 8 fully closes the motor valve and stops the supply of pressurizing steam. When the pressure of the vapor phase is reduced due to the supply stop of the pressurizing steam and falls below the target pressure P2 set below the target pressure zone, the control unit 8 opens the motor valve and supplies the pressurizing steam. To start.
Further, when the motor valve is controlled by the opening adjustment control, the opening of the motor valve is adjusted based on the pressure in the gas phase section as shown in FIG. That is, in a state where the pressure in the gas phase part is higher than the target pressure, the control part 8 gradually decreases the opening degree of the motor valve. On the other hand, in a state where the pressure in the gas phase portion is lower than the target pressure, the control portion 8 gradually increases the opening degree of the motor valve. The valve opening is constantly adjusted so that the pressure in the gas phase becomes the target pressure, and control is performed so that the difference between the target pressure and the pressure in the gas phase becomes small. Further, the range in which the valve opening can be adjusted can be changed as appropriate as long as it is a range from fully closed to fully open.

  Moreover, in the said embodiment, although the operation | movement when the pressure of a gaseous-phase part falls is abbreviate | omitted, when the pressure of a gaseous-phase part falls, it is good also as performing operation | movement required for equipment safety suitably. . Specifically, when a pressure sensor is provided in the hot water tank 20 and this pressure sensor detects a first pressure lower than the target pressure (3.5 kg / cm 2 G in gauge pressure), the control unit 8 (water temperature control unit 82) may close the heating steam supply valve 52. As a result, the temperature of the hot water (high temperature water) stored in the hot water tank 20 does not rise, so that the saturated vapor pressure of the hot water (high temperature water) stored in the hot water tank 20 is prevented from approaching the pressure in the gas phase. it can. That is, the pressure in the gas phase can be maintained at or above the saturated vapor pressure of hot water (high temperature water), and boiling of the high temperature water can be prevented.

  DESCRIPTION OF SYMBOLS 1 ... High temperature water production | generation apparatus, 10 ... Boiler, 11 ... Can body, 12 ... Steam header, 20 ... Hot water tank, 30 ... Load equipment, 40 ... Adjustment tank, 51 ... Pressurized steam supply valve, 52 ... Heating steam supply valve 53 ... Water level adjusting valve, 54 ... Check valve, 61 ... Circulation pump for load, 62 ... Hot water return pump, 63 ... Water supply pump, 71 ... Water level sensor LS, 72 ... Temperature sensor TH, L1 ... Pressure line, L2 ... heating line, L3 ... load circulation line, L4 ... water level adjustment line, L5 ... warm water return line, L6 ... water supply line, 8 ... control unit, 81 ... water level control unit, 82 ... water temperature control unit

Claims (7)

A high-temperature water generating device that generates high-temperature water using steam generated by a steam boiler and supplies the generated high-temperature water to a load device,
A hot water tank for storing hot water;
A line for pressurization that connects the steam boiler and the hot water tank, and supplies steam to the gas phase part of the hot water tank;
A heating line that connects the steam boiler and the hot water tank, and supplies steam to the liquid phase of the hot water tank;
A water supply line that connects the hot water tank and the steam boiler, and supplies hot water stored in the hot water tank to the steam boiler;
A high-temperature water generator comprising: An adjustment tank that is arranged downstream of the hot water tank and in which hot water stored in the hot water tank is transferred;
A water level adjusting line that connects the hot water tank and the adjustment tank, and supplies the adjustment tank with hot water stored in the hot water tank;
A hot water return line for connecting the hot water tank and the adjustment tank, and supplying hot water stored in the adjustment tank to the hot water tank;
A high-temperature water generator according to claim 1. A water level detector for detecting the level of hot water stored in the hot water tank;
An on-off valve provided in the water level adjusting line;
On condition that the water level detection unit detects a water level above a predetermined level, a water level control unit that opens the on-off valve; and
A high-temperature water generator according to claim 2. A water level detector for detecting the level of hot water stored in the hot water tank;
A water level control unit that supplies hot water from the adjustment tank to the hot water tank via the hot water return line on condition that the water level detection unit detects a water level lower than a predetermined level,
A high-temperature water generator according to any one of claims 2 and 3. Connecting the hot water tank and the load device, supplying high temperature water from the hot water tank to the load device, and a load circulation line for returning the high temperature water supplied to the load device to the hot water tank;
Further comprising
The connection portion of the water supply line with the hot water tank is disposed in the vicinity of the connection portion of the hot water return line with the hot water tank and / or the connection portion with the hot water tank on the downstream side of the load circulation line. The
The high temperature water production | generation apparatus in any one of Claim 2 to 4. A temperature detector for detecting the temperature of the high-temperature water supplied to the load device;
A water temperature controller for controlling the amount of steam supplied from the heating line to the hot water tank based on the temperature detected by the temperature detector;
The high-temperature water generator according to any one of claims 1 to 5, further comprising: In the pressurizing line, there is a steam pressure adjusting unit that adjusts the pressure of the steam so that the steam supplied to the gas phase part becomes a pressure exceeding a saturated steam pressure necessary for generating the high-temperature water. Provided,
The high temperature water production | generation apparatus in any one of Claims 1-6.

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