JPS6012556B2 - Hot water production equipment - Google Patents

Description

[Detailed description of the invention] The present invention relates to hot water production equipment.

In recent years, geothermal water has been used for power generation, etc., and it is sufficient to use this geothermal water as a heat supply source.However, this geothermal water contains large amounts of borons, calcium, silica, etc. cannot be supplied directly.

Therefore, it is being considered to use this geothermal water to exchange heat from freshwater such as river water or well water into hot water. by the way,
As shown in FIGS. 1 and 2, a conventional heat exchange device for hot water production equipment has a partition plate 2 erected in a horizontal cylindrical container 1 in the direction of its center and closed at the top. , an evaporation chamber 3 for the heating fluid a and a heating chamber 4 for the heated fluid b are formed in communication with each other, and the cylindrical container 1 is divided by a plurality of horizontal recessed walls 5 in the axis 0 direction to form a multistage structure. Moreover, it is a direct contact type. When the above heat exchange device is applied to heat exchange between geothermal water and river water, there are problems in selecting container materials, removing harmful components contained in geothermal water, etc. because the corrosion mechanisms for metals are different.

The present invention provides hot water production equipment that can solve the above problems.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

First, the outline of the hot water production equipment will be explained with reference to the flow sheet of FIG. 3. Geothermal water A, which is a heating fluid, once enters the geothermal water storage tank 11 and then is sent to the heat exchange device 12. On the other hand, river water B, which is a fluid to be heated, is sent from the water storage tank 13 to the heat exchange device 12 by a pump 14. Direct contact heat exchange using steam is performed in the heat exchange device 12, and the geothermal water from which heat has been removed is returned to the underground C via the storage tank 15 and the pump 16, where it is heated again. The river water turned into hot water D is once sent to the hot water storage tank 17 and then supplied to the consumption area. Next, each device will be explained in detail based on the drawings.

As shown in FIGS. 4 to 6, the heat exchange device 12 includes a geothermal evaporator 18 and a river water heater 19. As shown in FIG. 7 and FIG.
Thus, five evaporation chambers 22 are formed, making it a multi-stage flash type. In other words, "From the geothermal water inlet 23 side to the outlet 24 side
Toward the sides, each evaporation chamber 22 is sequentially depressurized. At the lower part of the partition plate 21, there is provided a passage pipe 25 which allows the adjacent evaporation chambers 22, 22 to communicate with each other and projects into the upper evaporation chamber 22. The lotus pipe 25 is equipped with a liquid level control valve 2 for controlling the geothermal water level in the evaporation chamber 22.
6 is built-in. In addition, the liquid level movement control valve 26 is
As shown in FIG. 7, all but the final stage evaporation chamber 22e are activated by a signal from a liquid level indicator 27 (shown in FIG. 11) provided in the same chamber, and outflow side control is achieved. There is. Furthermore, in order to prevent the liquid level from fluctuating when the geothermal heat k is suctioned and transferred into the next stage evaporation chamber 22 through the communication pipe 25, a baffle plate 28 is installed in front of the lotus pipe opening 26a.
is erected, and an inclined plate 29 is provided above the partition plate 21 to protrude from the partition plate 21. And the final stage evaporation chamber 22e
The internal geothermal heat source K is designed to allow natural drainage due to its water head. That is, the geothermal water outlet 24 has a geothermal water discharge pipe (
(See FIG. 11) The upper end of the 30 is soaked with acid, and the lower end thereof is closed in a water storage tank 15 provided at a sufficient vertical distance. Reference numeral 31 denotes a steam outlet provided at the top of each evaporation chamber 22, and is connected to a radiator 19, which will be described later.

32 is a vent provided before and after the evaporator 18, 33 is a manhole, 34 is a handhole, 35 is a peephole, 36
is the mounting port for the liquid level indicator 27.

Next, as shown in FIGS. 9 and 10, in the heater 19, five heating chambers 39a to 39e are formed by four partition plates 38 in one horizontal layer cylindrical container 37, and the above-mentioned evaporation Vessel 1
The evaporation chamber 39 has a multi-stage structure corresponding to each of the 8 evaporation chambers 39. That is, a steam intake port 40 is provided in the upper part of each evaporation chamber 39,
The evaporation chambers 22 and the corresponding heating chambers 39 are communicated via steam pipes 41, respectively. A water sprinkling pipe 43 having a water sprinkling nozzle 42 is provided above each heating chamber 39 to spray river water. Therefore, a part of the geothermal water evaporates into steam in the evaporation chamber 22,
This steam enters the heating chamber 39 via the steam pipe 41, contacts the sprinkled river water, and heats the river water. In addition, 4
4 is a water spray plate, 45 is a vent, 46 is a manhole, 47 is a peephole, and 48 is a mounting port for a liquid level gauge 49. here,
Explaining the flow of river water in the heater 19 based on FIG. 11, the geothermal water kA in the evaporator 18 flows to the right (c), but the river water B flows in the opposite direction, that is, to the left (d). It is like that. That is, the river water B is first supplied from the supply pipe 50 via the pump 14 to the first stage heating chamber 39 from its inlet 51.
Water is supplied to the evaporation chamber 22e, heated by steam from the final stage evaporation chamber 22e, and then transferred from the lower outlet 52 to the transfer supply pipe 53.
The water is transferred to the second-stage heating chamber 39b through the evaporation chamber 39b, and is heated by steam from the fourth-stage evaporation chamber 22d. In this way, the river water heated by the steam E of the geothermal water A in each heating chamber 39 becomes hot water and is transferred to the hot water storage tank 17, which will be described later. 54 is a pump provided midway between the river water supply pipe 53 and the heat discharge pipe 55.

The flow rates of geothermal water and hot water (river water) are controlled in order to keep the outlet temperature of the hot water constant. That is, an automatic flow rate ratio control valve 57 is installed in the geothermal water supply pipe 56.
The flow rate comparator 58 allows geothermal heat to be supplied into the evaporator 18 in accordance with the hot water flow rate. Also, 59
is an automatic flow rate control valve that monitors and controls the flow rate of hot water. Note that 60 and 61 are control units for the automatic control valves 57 and 59. Furthermore, each heating chamber 39
In order to keep the hot water (river water) outlet temperature constant, a bypass pipe 62 is provided to bypass the next-stage heating chamber 39. That is, one end of the bypass pipe 62 is connected to the upper river water supply pipes 50 and 53, and the pond end is connected to the river water supply pipe one downstream via the automatic temperature control valve 63 [the final stage is the hot water extraction pipe 55]. ] 53. The automatic overflow control valve 63 is controlled by the temperature of the hot water at the outlet of each heating chamber 39. Further, in order to keep the liquid level of the thermal arc in the heating chamber 39 constant, a control signal from a liquid level gauge 49 provided in the heating chamber 39 is provided in the middle of each river water supply pipe 50, 53. A liquid level control valve 64 is installed. In addition,
65, 66, 67 are each of the above automatic control valves 26, 63, 64
This is the signal transmitting part. Next, as shown in FIGS. 12 and 13, the geothermal water storage tank 11 and hot K hot water storage tank 17 are arranged in one vertical small cylindrical flash chamber 69 in the upper part of one laminated cylindrical container 68. It has been established. The geothermal water and hot water are supplied from the flash chamber 69 into the horizontal cylindrical container 68 through its inlet 70, and in the flash chamber 69, the geothermal water and the hot water contained in the hot water are evaporated and vaporized. is,
It is designed to be taken out through the vent hole 71. In addition,
72 is an exit, and 73 is a manhole. Next, the flow of the hydrothermal water creation process will be explained based on FIG.

First, the geothermal water A is sent to the geothermal water storage tank 11, where the specific S content is removed to some extent, and the geothermal water A is discharged from the vent 71.

The geothermal water that has left the geothermal water storage tank 11 is supplied to the evaporator 18, is evaporated in each evaporation chamber 22 in sequence, and is sent from the final stage evaporation chamber 22e to the water storage tank 15 via the geothermal water discharge pipe 30. is naturally excreted. On the other hand, river water B is supplied from the river water storage tank 13 into the heater 19 by the pump 14 via the river water supply pipe 50. Then, in the heating chamber 39 of the heater 19, the river water is ripened by the steam E of the geothermal water that has moved from the evaporator 18, and is sequentially moved inside each heating chamber 39 by the pump 54 to heat up. The hot water is sent from the water outlet pipe 55 to the hot water storage tank 17 via the pump 54. In addition, from the vents 45 of each of the heaters 19, 2S of the steam contained in the steam is released into the atmosphere, and when the inside of the heater 19 becomes negative pressure, a vent pipe 74 is provided in the middle of the pent pipe 74. vacuum pump 7
released by 5. As described above, the liquid level in each evaporation chamber 22 and each heating chamber 39 is controlled on the outflow side, and the hot water temperature at the outlet 52 of each heating chamber 39 is also controlled. Furthermore, the supply amount of geothermal water is changed according to the amount of hot water consumed, so that the temperature in the hot water outlet pipe 55 is always kept constant. In the hot water sent to the hot water storage tank 17, the S content contained therein is further discharged from the vent 71 to become clean hot water KD and sent to the consumption area. Therefore, the above embodiments have the following advantages.

■ Since the geothermal water evaporator and river water heater are separate, the corrosion mechanisms of each can be addressed.

■ A communication pipe for transferring geothermal water between each evaporation chamber in the evaporator is installed inside the evaporator, so there is no problem with piping that would occur if the piping was installed externally. This eliminates the disadvantage of increased diameter. ■ Since the geothermal water taken out from the evaporator is naturally discharged by the head of the geothermal water in the final stage evaporation chamber, the momme point, or geothermal K output temperature, that occurs when discharging with a pump, etc., for example, is reduced. Since the temperature is around 60o where scale is likely to occur, it is possible to eliminate the drawback of scale forming on valves, pumps, etc.

■ Mochi joint pipes that sequentially supply river water or hot water into the heating room of each stage of the heater are connected sequentially via bypass pipes, and the temperature is controlled by the hot water temperature in the heating room one level below the bypass pipes. We have installed an automatic control valve and a flow rate ratio automatic control valve that controls the flow rate of the geothermal water supply pipe according to the flow rate of the hot water extraction pipe, so even if the hot water consumption fluctuates, hot water at a constant temperature can always be delivered to the consumption area. can be supplied.

■ A hot water storage tank with a flash chamber is installed in the middle of the geothermal water supply pipe and the hot water outlet pipe, so the 2S per day dissolved in the hot water can be released into the atmosphere via the geothermal water and steam. Therefore, extremely clean hot water can be supplied to consumption areas.

As described above, according to the hot water production equipment of the present invention, since the evaporator and the heater are provided separately, it is possible to deal with heat exchange between two fluids with different corrosion mechanisms for container materials, and The piping lines for sequentially transferring the heated fluid into the heating chambers of each stage of the vessel are sequentially connected by a bypass pipe line, and the bypass pipe line is connected to
An automatic temperature control valve that is controlled according to the temperature of the heated fluid in the downstream piping path is installed to maintain a constant temperature of the heated fluid at the outlet of each stage heating chamber. An automatic flow ratio control valve that is controlled according to the flow rate in the heated fluid extraction line from the heater is installed in the heated fluid pipeline to the heater, so even if the heated fluid flow rate fluctuates. The fluid to be heated can always be taken out at a constant temperature.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of a conventional example, FIG. 2 is a cross-sectional view of the same, and FIGS. 3 to 13 show an embodiment of the present invention.
The figure is a flow sheet diagram, Figure 4 is a front view of the heat exchange device, Figure 5 is a view from the 1-1 arrow in Figure 4, Figure 6 is a view from the 0-ro arrow in Figure 4, and Figure 7. is a partial cross-sectional view of FIG. 5, FIG. 8 is a cross-sectional view taken along the line mm in FIG. 7, FIG. 9 is a partial cross-sectional view of FIG. 6, and FIG. FIG. 11 is a sectional view of a loss of vision, FIG. 11 is a flow sheet diagram of a main part, FIG. 12 is a sectional view of a cholecystis, and FIG. 13 is a view taken along the line V-V in FIG. 12. 11... Geothermal water storage tank (heated fluid storage tank), 12
...Heat exchange device, 17...Hot water storage tank (heated fluid storage tank), 18...Evaporator 19...
Heater, 21... Partition plate, 22... Evaporation chamber, 2
5... Lotus pipe, 25a... Closing, 26... Sediment liquid level control valve, 30... Geothermal water discharge pipe, 31
...Steam outlet, 32...Vent, 3
8... Partition plate, 39... Heating chamber, 40...
Steam intake, 41...Steam pipe, 45...
・Vent, 50, 53... Supply pipe, 55...
... Hot water extraction pipe, 56 ... Geothermal water supply pipe, 5
7...Automatic flow rate control valve, 59...Automatic flow rate control valve, 62...Bypass pipe, 63...
...Temperature automatic control valve, 64...Liquid level control valve, 69...Flash chamber, 71...Vent. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13

Claims (1)

[Claims] 1. In a multi-stage flash type direct contact hot water production facility, an evaporator for heating fluid and a heater for heated fluid are provided separately, and an evaporation chamber of the evaporator and a heating chamber of the heater corresponding to the evaporation chamber are provided. The gas phase portions of the heater are connected through steam pipes, and piping lines for sequentially transferring the fluid to be heated into the heating chambers of each stage of the heater are sequentially connected by bypass pipes, and to the bypass pipes,
An automatic temperature control valve that is controlled according to the temperature of the heated fluid in the downstream piping path is installed to maintain a constant temperature of the heated fluid at the outlet of each stage heating chamber. 1. A hot water production facility characterized in that an automatic flow rate ratio control valve is interposed in a heated fluid pipe line leading to the heater, the flow rate ratio automatic control valve being controlled according to the flow rate in the heated fluid extraction line from the heater.