JPH0642957B2 - Hot spring water scale control method and hot spring water scale control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is directed to mineral substances dissolved in hot spring water pumped from underground to the surface, causing changes in temperature and pressure associated with the pumping, and contact with the atmosphere. The method and device for controlling scale attached to the inside of the water supply pipe, etc.
In particular, the present invention relates to a method and an apparatus for controlling a novel scale obtained by subjecting hot spring water such as calcareous to both magnetic treatment and dissolution / mixing treatment with sodium polyphosphate.

(Conventional technology and conventional problems) In hot spring areas in various places, underground hot springs are pumped up by boring up to a depth of 1,400 m underground.

In this case, in order to pump hot spring water to the surface of the earth in consideration of the ground pressure, the hot spring water is pumped by lowering a pipe having a submersible pump attached to its tip to the water surface.

In some hot spring areas, the hot spring water is pumped up by sending air from the surface of the earth into the hot water surface without using the pump.

The above hot spring water contains metal compounds such as sulfur, sulfate, iron, siliceous, calcareous, aluminum, manganese, and copper, and these metal compounds are completely removed under high earth pressure. It is dissolved and also contains sediment, slums such as microorganisms, and other types of suspended solids.

Metal compounds etc. dissolved in these hot spring water are
Due to changes in temperature and pressure due to pumping, contact with the atmosphere, etc., precipitates will be deposited by being pumped to the surface of the earth under atmospheric pressure, and will adhere to the inside of the water supply pipe and the like.

In particular, a large amount of calcareous is deposited in these metal compounds, and this calcareous substance causes scale to adhere to the inside of the water supply pipe that is the facility for pumping hot spring water, valves, submersible pumps, hot water storage tanks, etc. There was a problem that a scale was generated.

Further, when the scale grows inside the water supply pipe in this way, the water supply path becomes narrow, and the path is blocked, and pumping up of hot spring water and water supply are obstructed, and the water supply pipe, valve, submersible pump within a short period of time. However, there is a problem in that replacement work is required, and the operating loss and maintenance cost of the equipment and equipment accompanying the replacement of these equipments become enormous.

Further, the scale generated inside the water supply pipe or the like is also dissolved and removed by using an acid, but in this case, the problem is that the acid used for the dissolution and removal causes pollution. was there.

Furthermore, the scale is produced by Ca (HCO ₃ ) ₂ → CaCO
As a result of the formula of ₃ + CO ₂ + H ₂ O, CaCO ₃ becomes a scale, but CO ₂ gas is generated due to pressure change etc. accompanying pumping up, and this CO ₂ gas is sucked into the pumping pump to cause cavitation. As a result, the pumping pump is temporarily stopped, which makes the pumping volume unstable and shortens the life of the pumping pump.

(Object of the Invention) The present invention has been made in view of the above-mentioned conventional problems, in which mineral substances dissolved in hot spring water pumped from the underground to the surface of the earth have a change in temperature and pressure due to the pumping. ,
Even if contact with the atmosphere occurs, by preventing precipitation from the hot spring water, scale will not adhere to the inside of the water supply pipe, etc., and cavitation will not occur in the pumping pump due to gas generation. It is an object of the present invention to provide a method for controlling scale of hot spring water and an apparatus therefor.

(Means for Solving Problems) The present invention relates to a method for controlling scale of hot spring water, in which a part of the hot spring water containing two or more kinds of inorganic cations pumped to the surface of the ground is branched to Magnetic processing,
Provided is a method for controlling scale of hot spring water, which comprises performing a treatment of dissolving and mixing sodium polyphosphate in the hot spring water, and then applying pressure to inject the hot spring water in the vicinity of a pumping port or an ejector. As a result, in a scale control device for hot spring water, a magnetizer, a branch pipe for branching a part of the hot spring water from a hot water storage tank for storing the hot spring water containing two or more kinds of inorganic cations pumped to the surface of the earth, It is configured to inject hot spring water into the vicinity of the hot water pumping port or the ejector by connecting the sodium polyphosphate dissolving and mixing filler in the order of arrangement or in the reverse order and further increasing the pressure with a pressure increasing pump. By providing a characteristic hot spring water scale control device, and in the method of controlling hot spring water scale, The branches the part of the hot spring water containing 2 or more inorganic cations, a first magnetic treatment against temperature spring water, and dissolved contamination process sodium polyphosphate, a second magnetic treatment,
By providing a method for controlling scales of hot spring water, which is characterized by increasing the pressure and injecting it into the vicinity of the pumping outlet of hot spring water or to the ejector after applying the above method. Hot water storage tank for storing hot spring water containing two or more kinds of inorganic cations pumped to the water, a branch pipe for branching a part of the hot spring water from the hot water storage tank, and a first magnetizer for magnetically treating the hot spring water And a filler for dissolving and mixing sodium polyphosphate in the hot spring water, a second magnetizer for magnetically treating the hot spring water, and a step-up pump, are arranged in series to treat the hot spring water. The above object is achieved by providing a scale control device for hot spring water, which is characterized in that it is configured to be injected near the upper mouth or in an ejector.

(Action) Scale control of calcareous hot spring water in the present invention, after branching a part of the hot spring water pumped to the surface of the ground, after the magnetization of the hot spring water and the dissolution and mixing of sodium polyphosphate as a scale control agent, Since the hot spring water is injected and circulated, a magnetic field is applied to the mineral matter dissolved in the hot spring water. Due to the application of this magnetic field, the Hall effect is generated due to the effects of hydrodynamic force and Lorentz force. Prevents scaling by strengthening convection of dissolved substances in water and changing the moving direction of ions.

The removal of the scale that has already been generated promotes the penetration of the magnetized water by the turbulence of the ionic flow, and sodium polyphosphate, which is a scale control agent, suppresses the growth of calcium crystals to form fine ball-shaped particles. To make sludge.

In this way, by penetrating the scale layer, the calcium scale (crystals) is made finer and separated from the scale surface layer as sludge, so that the produced scale can be removed.

(Examples) Examples of the present invention will be described in detail below.

As shown in FIG. 1, this embodiment contains two or more kinds of inorganic cations which are pumped from the hot spring source X to the surface of the earth through the scooping pipe 3 and supplied to the hot spring bath 5 by driving the scooping pump 1. A hot water storage tank 7 for temporarily storing hot spring water, a branch pipe 9 for branching a part of the hot spring water from the hot water storage tank 7, a magnetizer 11 for magnetically treating the hot spring water,
A filler 13 for dissolving and mixing sodium polyphosphate,
Are connected in series, magnetic treatment and dissolution / mixing treatment of sodium polyphosphate are performed on the branched hot spring water, and the hot spring water subjected to the treatment is supplied to the booster water injection pump 15
The pressure is increased by means of the water, and the hot spring water is injected into the vicinity 19 or the ejector 21 through the water injection pipe 17.

The hot spring water is pumped to the surface of the earth using a multistage pumping pump 23.

The pumping pump 23 is provided with a hot spring water pumping port 19.

The amount of hot spring water that is magnetically processed by being branched from the hot water storage tank 7 by the branch pipe 9 will vary depending on the amount of scale attached to the inside of the water supply pipe, etc. -1/50, preferably 1 / 10-1 / 25.

Inside the magnetizer 11, as shown in FIG. 2, a plurality of doughnut permanent magnets 25, preferably 6 to 12,
The poles S and S are alternately laminated to each other, and the magnetic treatment is performed by forcibly circulating hot spring water between the permanent magnets 25 as indicated by a symbol Y in the figure. There is.

The magnetic flux density of the permanent magnet 25 is 1500 to 5000 gauss, preferably 2500 gauss or more.

The number of the permanent magnets 25 arranged varies depending on the diameter of the water supply pipe and the amount of water passing, but in any case, the hot spring water to be passed is magnetically processed at 1500 to 5000 gauss. Has been adjusted.

A yoke 27 is fitted in the outer portions of the opposed permanent magnets 25 so that the lines of magnetic force are not emitted to the outside of the opposed permanent magnets 25 but are only emitted to the inside where the hot spring water is passed. ing.

Due to the magnetic treatment of the hot spring water by the magnetizer 11, a magnetic field of the mineral matter dissolved in the hot spring water is applied, and the application of this magnetic field causes turbulence in the shunting of the ion current, and the moving direction of the ions. That is, the hot spring water crosses the magnetic lines of force, and the dissolved substance in the hot spring water causes the Hall effect due to the influence of the hydrodynamic force and Lorentz force to enhance the convection of the dissolved substance. , The direction of movement of ions is changed, and scale formation is suppressed.

A bulk drug is filled in the filling device 13.

The bulk drug filled in the filling device 13 has a molecular formula of (NaPO ₃ ) n. Represented by [n = positive integer], n ≧ 6
In the case where n = 6, the molecular weight is 611.77, which is a transparent or translucent glassy sodium polyphosphate mass (10 to 30 m / m square) having a molecular structure of a cyclic or long chain bond,
Condensation polymer sodium phosphate for food additives is preferred, and due to its strong complexing force, it has a calcium ion blocking action, calcium scale intestinal action, sludge dispersing action, and maintains an appropriate dissolved concentration in water. Use what you can.

The amount of the glassy sodium polyphosphate dissolved in water is affected by the water temperature and the flow velocity, and the condition is set according to the calcareous concentration in the pumped hot spring water (0.22 g / 1 as Ca on average), and 2 to 1/200, preferably 1/30 to 1 /
Adjust to a range of 120.

The hot spring water is fed into the filling device 13 and the sodium polyphosphate is dissolved in the hot spring water, so that the sodium polyphosphate is adsorbed by the calcium carbonate crystal which is the beginning of the scale formation and is prevented from solidifying as a scale. To be done.

That is, when the calcareous dissolved substance in the hot spring water, which is completely dissolved under pressure in the ground, is pumped up to the surface of the earth, or springs out,
According to the formula of Ca (HCO ₃ ) ₂ = CaCO ₃ + H ₂ O + CO ₂ , carbon dioxide is released from water to precipitate calcium carbonate.

In addition, other metal compounds form a precipitate scale.

The calcium scale grows due to the accumulation of the calcium carbonate crystals, but in the present invention, sodium polyphosphate dissolved in water is several tenths to several hundredths of the calcium concentration in the hot spring water. With the concentration of, the growth of calcium crystal (precipitate) scale is suppressed and fine ball-shaped particles are formed to form sludge, which prevents scale formation.

That is, Ca (HCO ₃ ) ₂ + 2Fe (OH) ₂ + (NaPO ₃ ) nH ₂ O → CaFe (PO
₄ ) ₂ + Na ₂ CO ₃ , which has the effect of sequestering calcium ions by the complexing force and the action of dispersing sludge.

Further, sodium polyphosphate, when used alone, usually treats 3 to 5 times the concentration of cations by the threshold action, but when it is magnetized as in this example, that is, , 30 times as much cation treatment is performed.

In addition, the produced scale is removed by making the scale layer fine by infiltrating the magnetized water into the scale layer and further forming a compound with sodium polyphosphate, and separating it from the surface portion to form sludge.

In addition, as described in claims 3 and 4 of the present invention, after performing the magnetic treatment of the hot spring water by the first magnetizer 11, the filling device 13
Thus, the magnetic treatment of the hot spring water can be completed by dissolving the sodium polyphosphate by the method described above and then again performing the magnetic treatment of the hot spring water by the second magnetizer 12.

The hot spring water that has been subjected to the above treatment is boosted by the booster pump 15, is inserted underground along the hot water pumping pipe, and is poured into the vicinity of the hot spring pumping port 19 of the pumping pump 23.

The pressure increase at the time of water injection is related to the depth of underground pumping and the spring water pressure.
3-5kg / m ² Use a booster pump that has a high water pressure.

In addition, in hot spring water with spring pressure, as shown in Fig. 1 (b),
It can be injected by providing the ejector 21 in the pumping pipe.

Next, the progress data of the pumping water amount according to the embodiment of the present invention will be described with reference to Tables 1 and 2 below.

In Example-1 in Table 1 above, as shown in the piping system diagram shown in Fig. 1 (a), calcareous (Ca220mg / 1) hot spring water was underground 2
The iron pipe with a diameter of 100 mm from 00m pumps up to 48 tons / hour, and the branch pipe with a diameter of 25 mm from the hot water tank diverts it to 2.4 tons / hour. It is passed through a magnetizer that is stacked and stored, and then passed through a dissolution mixer (324 m / mφ × 570 m / mH) filled with 24 kg of 15 × 25 m / m square sodium polyphosphate, and P ₂ O ₅ as 5.5 g / m ³ (water temperature: 40 ° C.) becomes concentration, which was raised to 25 kg / cm ² G with 35 kg / cm ² G pump, the pumping port by an iron pipe which is the piping to the tip along the pumped iron pipe The amount of water in the pumping hot spring after injection was observed over 22 days.

In addition, Comparative Example A-1 for comparison with the data of Example 1 in Table 1 above includes a magnetizer, a filler, etc. It is the measurement data when the hot spring water is simply pumped up without passing through, and Comparative Example A-2, as shown in the piping system diagram shown in FIG. This is the measurement data when pumping water.

In Example-2 in Table-2 above, as shown in the piping system diagram shown in Fig. 3, calcareous (Ca310mg / 1) hot spring water is pumped from 60m underground to an iron pipe with a diameter of 100mm at 54 ton / hr, and further stored hot water. From the tank, a branch pipe with a pipe diameter of 37.5 mm was diverted at 2.4 ton / hour, and the diverted hot spring water was circulated to the first magnetizer in which 10 sheets of 3500 gauss permanent magnets were stacked and stored, and then , 15 × 25 m / m square sodium polyphosphate 24 kg filled in a dissolution mixer (324 m / mφ × 570 m / mH), and flowed as P ₂ O ₅ 5.5 g / m ³ (water temperature: 40 ° C.) The concentration of
This is further circulated to a second magnetizer in which 10 sheets of 3500 gauss permanent magnets are stacked and stored, and then 10 kg / cm ² G
The pressure is increased to 6 kg / cm ² G with the pump of
An iron pipe of 37.5 m / mφ was piped up to the injection mixing part provided at 10 m, and the pumping hot spring water volume was measured over 22 days when the magnetizing and chemical mixed water was injected into the mixing part.

For comparison with the data of Example-2 in Table-2 above, the comparison column B-1 passes through a magnetizer, a filler, etc. as shown in the piping system diagram shown in FIG. 4 (c). It is the measurement data when the hot spring water is simply pumped up without being performed, and Comparative Example B-2 shows the hot spring water passing through the magnetizer as shown in the piping system diagram in FIG. 4 (b). It is the measurement data when pumping up.

(Effects of the Invention) Since the present invention controls the scale of hot spring water by the method and apparatus described above, it has the following effects.

In the present invention, by applying the magnetic field of the hot spring water to the turbulence of the shunt of the ion flow, the moving direction of the ions changes and scale formation is suppressed, and the growth of scale crystals is suppressed by the dissolution and mixing of sodium polyphosphate. The formation of fine ball-shaped particles suppresses scaling.

In this way, since the magnetic treatment and the dissolving and mixing treatment of sodium polyphosphate are simultaneously performed in the hot spring water, the mineral substances dissolved in the hot spring water pumped from the underground to the surface are Even when there is a change or contact with the atmosphere, precipitation from the hot spring water can be suppressed.

Therefore, the dissolved mineral matter in the hot spring water is not deposited,
It has an excellent effect that scale can be prevented from adhering to the inside of the water supply pipe, and that pumping of hot spring water and obstruction of water supply due to blockage of the pipe can be prevented.

Further, as the replacement work of the water supply pipe, the valve, the submersible pump, etc. is not required as described above, it has an excellent effect that it is possible to reduce the operating loss and the maintenance cost of the facility equipment due to the replacement of these facilities. It is a thing.

Further, since it is not necessary to wash the water supply pipe with an acid, it has an excellent effect that pollution caused by the acid used for the washing is not caused.

Furthermore, even if the pressure changes due to pumping, dissolved gas in the hot spring water is not generated, so cavitation caused by the bubbles of the gas being sucked into the submersible pump does not occur, and the submersible pump is temporarily operated. It has an excellent effect that the amount of pumped water becomes unstable and the life of the submersible pump is not shortened by stopping the operation.

[Brief description of drawings]

FIG. 1 (a) is a piping system diagram of the method and apparatus for controlling hot spring water scale in the embodiment of claims 1 and 2 of the present invention, and FIG. 1 (b) is the case in which water is injected into the ejector in the embodiment. Fig. 2 is an arrangement diagram of permanent magnets in the magnetizer in the above embodiment, and Fig. 3 is a piping system diagram of the method and apparatus for controlling hot spring water scale in the embodiments of claims 3 and 4 of the present invention. 4 (a) is a piping system diagram in Comparative Example A-2 in Table-1, FIG. 4 (b) is a piping system diagram in Comparative Example B-2 in Table-2, and FIG. 4 (c) is Comparative Example A-1 and Table-2 in Table-1
3 is a piping system diagram in Comparative Example B-1 in FIG. 7 ... Hot water storage tank, 9 ... Branch pipe, 11 ... First magnetizer, 13 ... Filler, 12 ... Second magnetizer, 15 ... Boost pump.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A 63-224796 (JP, A) JP-A 52-151670 (JP, A) JP-A 63-107799 (JP, A) JP-A 64- 80497 (JP, A)

Claims (4)

[Claims] 1. A method for controlling scale of hot spring water, wherein a part of the hot spring water containing at least two kinds of inorganic cations pumped to the surface of the earth is branched and magnetic treatment is performed on the hot spring water.
A method for controlling scale of hot spring water, which comprises performing a treatment of dissolving and mixing sodium polyphosphate in the hot spring water, and then increasing the pressure to inject the hot spring water into the vicinity of a pumping port or an ejector. 2. A scale control device for hot spring water, wherein a branch pipe for branching a part of the hot spring water from a hot water storage tank for storing the hot spring water containing at least two kinds of inorganic cations pumped to the surface of the earth, a magnetizer, The hot spring water subjected to the treatment according to claim 1 is connected in the order of arrangement of the sodium polyphosphate-dissolving fillers in the order of arrangement or in the reverse order, and the pressure is increased by a pressure increasing pump. Alternatively, the scale control device for hot spring water is configured to be injected into an ejector. 3. A method for controlling scale of hot spring water, wherein a part of the hot spring water containing two or more kinds of inorganic cations pumped to the surface of the ground is branched, and the first hot spring water is subjected to a first magnetic treatment. A method for controlling scale of hot spring water, which comprises performing a dissolution and mixing treatment of sodium polyphosphate and a second magnetic treatment, and then increasing the pressure to inject the hot spring water into the vicinity of a pumping port or an ejector. 4. A scale control device for hot spring water, comprising: a hot water storage tank for storing hot water containing two or more kinds of inorganic cations pumped to the surface of the earth; and a branch pipe for branching a part of the hot water from the hot water storage tank. , A first magnetizer for magnetically treating the hot spring water, a filler for dissolving and mixing sodium polyphosphate in the hot spring water, a second magnetizer for magnetically treating the hot spring water, and a booster pump in series. The scale control treatment according to claim 3 is performed by arranging the scale to the hot spring water scale, and the treated hot spring water is injected into the vicinity of the hot spring water pumping port or the ejector. Control device.