JPH0743509U - Boiler with electrode type water treatment device - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a boiler that can prevent reduction in fuel consumption and life due to scale adhering to the heating portion of a combustion chamber, etc., and requires almost no maintenance. [Structure] A plurality of pipes 9 are arranged in a combustion chamber 15, and a water containing portion 8 for containing water to be passed through the pipes 9 is provided at one end of the pipes 9.
And a water supply pipe 10 for supplying water to the pipe 9 through the water containing portion 8, and a steam supply portion 12 for supplying the hot water heated by the pipe 9 as steam to the other end of the pipe 9. The water supply pipe 10 is provided with an electrode-type water treatment device unit 11, the electrodes 1 and 2 are arranged to face each other in the unit 11, and a rectangular pulse oscillating circuit 5 is provided in the control device 6. , 2 and the rectangular pulse oscillation circuit 5 connects the electrodes 1,
A polarity reversal voltage is applied to 2, and a pulse current is passed through the water passing through the water supply pipe 10 to activate the water, thereby suppressing scale generation.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a boiler with an electrode-type water treatment device used for supplying steam to a desired place such as a steam press room or a room to be heated.

[0002]

[Prior art]

 FIG. 5 shows an example of a conventional boiler. In the figure, a plurality of pipes 9 are provided in the combustion chamber 15, and the pipes 9 function as a heating unit that is heated by the combustion of a combustion device such as a burner 14 provided in the combustion chamber 15. ing. At one end of the pipe 9, there is provided a header 8 that supports the pipe 9 and functions as a water storage portion that stores the water to be supplied to the pipe 9. The header 8 communicates with the header 8 to store the water in the header 8. A water supply pipe 10 for supply is provided, and the water supply pipe 10 is connected to a water supply or the like. The water supply pipe 10 functions as a water supply passage for water introduced into the heating section of the combustion chamber 15. The other end of the pipe 9 is provided with a tank 17 for storing the hot water heated by the burner 14 through the pipe 9, and the hot water of the tank 17 is supplied to the upper part of the tank 17 as steam. The steam supply unit 12 is provided, and the steam passage 13 of the steam supply unit 12 is extended to a desired location such as a steam press room or a warming room of a cleaning company.

An exhaust passage 16 is provided in the combustion chamber 15 so as to communicate with the combustion chamber 15, and exhaust gas such as carbon dioxide generated by the combustion of the burner 14 is exhausted. Incidentally, such a boiler is provided with a control device 6 for controlling combustion of the burner 14 and the like.

In such a boiler, water such as tap water is supplied from the water supply pipe 10 to the header 8, the water is supplied from the header 8 to the pipe 9 as indicated by an arrow in the figure, and the water passing through the pipe 9 is burned by the burner 14 Is heated to form hot water, which is stored in the tank 17, reduced in pressure by the steam supply unit 12 as necessary and converted into steam, and sent to the desired place by the steam passage 13.

[0005]

[Problems to be solved by the device]

 However, tap water contains substances such as calcium and magnesium, and as the boiler is used, these substances are deposited as scales, and the scales are deposited on the inner wall of the pipe 9 and the water supply pipe 10. Etc. to attach and grow. Thus, if the scale adheres and grows on the inner wall of the water supply pipe 10, it becomes difficult for water to be supplied to the water accommodating portion 8 side, and if the scale adheres and grows on the inner wall of the pipe 9, the water in the pipe 9 is burned by the burner 14. At the time of heating, the heat of the burner 14 becomes difficult to be transferred to the water in the pipe 9, and the heating efficiency is lowered, and the fuel efficiency is deteriorated, which is a problem.

Further, when the scale adheres to the inner wall of the pipe 9, the pipe 9 is clogged, so that maintenance such as cleaning the pipe 9 or replacing the pipe 9 must be performed. Maintenance was troublesome, and the life of the boiler was shortened, which was a problem.

In order to suppress the generation and precipitation of scale as described above, for example, a drug for scale prevention may be added to the dotted line portion 20 in FIG. 5, but such a drug is used. It is troublesome to put in the medicine, and when the medicine is exhausted, the scale prevention is not performed, so it is troublesome to replenish and replace the medicine regularly.

The present invention was made in order to solve the above-mentioned conventional problems, and the purpose thereof is to reduce the heating efficiency due to a burner or the like or to clog the pipe due to the scale adhering to the pipe or the like. The purpose of the present invention is to provide a boiler with an electrode-type water treatment device that prevents problems caused by the above, has good fuel consumption, has a long life, and is not troublesome to maintain.

[0009]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention is configured as follows. That is, the present invention is a boiler equipped with a combustion chamber, which heats water passing through the combustion chamber, and supplies the heated hot water as it is or in the form of steam to the water introduced into the heating section by the combustion chamber. Electrodes are arranged opposite to each other in the water supply passage, and polarity inversion driving means for applying a polarity inversion voltage to the electrodes is provided.

[0010]

[Action]

 In the present invention having the above-mentioned structure, the electrodes are arranged opposite to each other in the water supply passage, and the polarity reversal drive means for applying the polarity reversal voltage to this electrode is provided in the boiler. When a polarity reversal voltage is applied to the electrodes provided in, the water molecules are activated and the bias of the ions in the water passing through the water supply passage is eliminated, making it difficult for crystallization to occur, and calcium and magnesium contained in the water scale. Therefore, it becomes difficult to deposit. Therefore, the scale does not adhere to the boiler pipes, etc., and the pipes are prevented from being clogged by the scales, and the reduction of fuel consumption and life of the boiler is prevented.

[0011]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. In the description of the present embodiment, the same reference numerals will be given to the same names as those in the conventional example, and detailed description thereof will be omitted. FIG. 1 shows an embodiment of a boiler with an electrode-type water treatment device according to the present invention. This embodiment is different from the conventional example in that a water supply pipe 10 is provided with an electrode type water treatment device unit 11, and an electrode 1 and an electrode 2 are arranged in the unit 11 so as to face each other. That is, the rectangular pulse oscillating circuit 5 functioning as the polarity inverting drive means for applying the polarity inverting voltage to 1 and 2 is provided, and the rectangular pulse oscillating circuit 5 and the electrodes 1 and 2 are connected. The electrode type water treatment device unit 11 has a housing 4, and the housing 4 is provided with electrodes 1 and 2. Further, the electrode type water treatment device unit 11 is detachably attached to the water supply pipe 10 at the connection portion 24 of the housing 4.

As shown in FIG. 2, the control device 6 has a power supply circuit 3 and a rectangular pulse oscillation circuit 5. The power supply circuit 3 has a transformer, and lowers the voltage from the power supply (commercial power supply) and applies it to the rectangular pulse oscillation circuit 5. The rectangular pulse oscillating circuit 5 oscillates a polarity reversal voltage and applies (applies) it to the electrodes 1 and 2, respectively. The electrodes 1 and 2 have a negative polarity when the electrode 1 has a positive polarity. On the contrary, when the polarity of the electrode 1 is negative, the polarity of the electrode 2 is positive.

Applying the polarity reversal voltage to the electrodes 1 and 2 means, for example, that when the polarity of the electrode 1 is positive, the polarity of the electrode 2 is negative, and then the polarities of the electrodes 1 and 2 are switched. Contrary to the above, the polarity of the electrode 1 is negative, the polarity of the electrode 2 is positive, and then the polarities of the electrodes 1 and 2 are reversed. This is to apply a voltage while periodically switching inversion. Then, the current flowing between the electrodes 1 and 2 has a rectangular shape that periodically changes with time t, as shown in FIG. It becomes a pulse current.

By the way, when an electric current is applied to water, the energy of the electric current is applied to the water, whereby the size of the molecular group of water is subdivided and activated, so that the electric current is applied to the water containing the scale. It is considered that the scale becomes easy to dissolve in water when flowing, and further, when the flowing current is a polarity reversal current, uneven distribution of positive ions and negative ions in water is eliminated, and it is considered that the scale does not grow easily.

Moreover, since the polarity reversal current is applied as a rectangular pulse current as shown in FIG. 3A, the polarity reversal switching of the opposing electrodes is instantaneously and rapidly performed. Causes the momentary inertial energy when the scale is reversed by switching the polarity of the electrode to break, causing the scale molecules to become very small and dissolve in water due to the breaking of the bonds between the scale molecules and molecules. The occurrence is considered to be suppressed more effectively. The applicant conducted an experiment in which a pair of electrodes were placed opposite each other in the water of a beaker such as tap water, and a rectangular polarity reversal current was passed between the electrodes to detect the generation of scale. It has been confirmed that it was suppressed.

More specifically, the scale shape and properties of the present embodiment and the conventional example are different, and in the conventional case, the needle-like shape sticks and deposits on the surface of the boiler pipe 9 and the water supply pipe 10, and gradually increases. As it grows, it becomes possible to visually confirm the adhesion of scale, whereas in this example, it is difficult to deposit itself, but even if it deposits, it appears in a granular shape on the surface of the pipe 9 or the like. However, since it scattered immediately into the water, floated in the water in the pipe, and did not grow greatly, it was not possible to confirm the sticking of the scale, and it was passed through the hot water storage section 17 and passed through the steam passage 13 together with the steam. It will be sent to the desired location. Further, even when the water is left in the pipe 9, it will be suspended again in water when the water is injected into the tank next time. In addition, even if the scale is left behind on the pipe and the scale must be removed by cleaning, it can be easily removed by washing it with water or rubbing it by hand because it is attached instead of sticking.

Further, as shown in Table 1, there is a point where this effect is particularly remarkable depending on the voltage and frequency applied to the electrode, and it has been confirmed that there is a difference in the effect. In the table, double circles indicate extremely good, circles indicate good, and − indicates no effect.

[0018]

[Table 1]

The present embodiment is configured as described above, and its operation will be described next. Also in this embodiment, as in the conventional example, water is supplied from the water supply pipe 10 to the water storage portion 8, the water is supplied to the pipe 9, and the water in the pipe 9 is heated by the burner 14 to become steam. However, in the present embodiment, an electrode type water treatment device unit 11 is provided in the water supply pipe 10, and the electrodes 1 and 2 are arranged to face each other in this unit 11. Since the polarity reversal voltage is applied to the electrodes 1 and 2 by the rectangular pulse oscillating circuit 5 of the control device 6, a rectangular waveform as shown in (a) of FIG. 3 is provided between the electrodes 1 and 2. Shaped pulse current flows.

Then, the water passing through the water supply pipe 10 is activated, and since the uneven distribution of positive ions and negative ions in the water is eliminated, it becomes difficult for the scale to grow, the generation of scale is suppressed, and the electrode 1 and Since the polarity reversal switching with the electrode 2 is performed instantaneously, even if the scale is generated, the inertia energy when the scale is reversed during the polarity reversal switching of the electrodes 1 and 2 causes Since the inter-bonding is broken and it becomes soluble in water, the generation of scale is almost completely suppressed, it becomes a state of being dissolved in water, and after being heated through the pipe 9, steam is generated together with water in the steam supply unit 12. As a result, it can be sent from the steam passage 13 to a desired place.

According to the present embodiment, since the generation of scale in the water passing through the water supply pipe 10 is completely suppressed by the above operation, the scale may adhere to the inner wall of the water supply pipe 10 or the pipe 9. This prevents the scale from adhering to the water supply pipe 10 and makes it difficult for water to be sent to the water storage section 8 side, or the scale adheres to the inner wall of the pipe 9, causing the heat of the burner 14 to reach the water in the pipe 9. It becomes difficult to transmit, and it is possible to prevent problems such as deterioration of heating efficiency and clogging of the pipe 9 due to adhesion of scale, and almost no troublesome maintenance such as swaging or replacement of the pipe 9 is required. Boiler life will also be extended.

Moreover, since the generation of scale can be almost completely suppressed as described above, even when a chemical is injected into the water supply pipe 10, the amount thereof can be extremely reduced, and the chemical can be reduced. It is also possible to reduce the frequency of replenishment and replacement of the drug, and further, it is possible to increase the solubility of the drug in water by treating and activating the water.

Further, according to the boiler of the present embodiment, as described above, the heating efficiency of the burner 14 is high, the fuel consumption is high, and it is possible to save energy, and the life of the boiler is shortened due to the clogging of the pipe 9. Since such a problem is also eliminated, it is possible to make a very good boiler that the user can use comfortably.

Further, if a direct current is passed between the electrodes 1 and 2, hydrogen is generated due to electrolysis of water due to the flow of the direct current, or a device for electrolysis is generated. Precipitates may adhere to the surfaces of the electrodes 1 and 2 due to the action, but in this embodiment, the polarity reversal voltage is applied between the electrodes 1 and 2, so that the surfaces of the electrodes 1 and 2 are The deposit does not adhere to the electrode to impair its function, and the electrode portion does not generate gas due to electrolysis.

The present invention is not limited to the above-mentioned embodiment, and can take various modes. For example, in the above-described embodiment, the rectangular pulse oscillator circuit 5 is provided in the control device 6 that controls the burner combustion of the boiler and is configured to operate by using the commercial power source. Does not always use the commercial power source by being provided in the same control device 6 as the control device that performs burner combustion control. Instead, it is provided on a control device board different from the burner, and a battery is provided in the boiler. The battery may be used to perform the operation.

In the above embodiment, the water supply pipe 10 is provided with the electrode-type water treatment device unit 11, and the electrodes 1 and 2 are provided in the unit 11. However, the electrodes 1 and 2 are provided directly to the water supply pipe 10. The electrodes 1 and 2 may be connected to the rectangular pulse oscillation circuit 5.

Further, in the above embodiment, the rectangular pulse oscillating circuit 5 is provided as the polarity reversing driving means, but the polarity reversing driving means is not necessarily the rectangular pulse oscillating circuit 5, and for example, FIG. The polarity reversal drive means may be provided so that a sinusoidal pulse current as shown in (b) of FIG. However, when the rectangular pulse current is configured to flow between the electrodes 1 and 2 as in the above embodiment, the polarity reversal switching between the electrode 1 and the electrode 2 is instantaneously performed, and this switching At this time, the scale suddenly reverses, and the inertial energy breaks the scale bonds, making it easier to dissolve in water and preventing precipitation.Therefore, the scale generation is more effectively prevented. It is more desirable to provide a pulse oscillation circuit.

Further, the structure and the like of the boiler with an electrode type water treatment device of the present invention are not limited to the above-mentioned embodiment, and for example, the heating part by the combustion chamber 15 is not used as the pipe 9 but is shown in FIG. A water activating device unit 11 may be provided in the water supply pipe 10 of the boiler for supplying water to a desired place by converting the hot water heated in the heating section into steam as shown in the water activating device unit 11 Instead of providing the above, the electrodes 1 and 2 may be provided directly on the water supply pipe 10 and are applied to various boilers.

Further, in the circulation type boiler as shown in FIG. 4, the electrodes 1 and 2 or the water activation device unit 11 are not necessarily provided in the water supply pipe 10, and any one of the circulation pipe lines 22 is provided. It may be provided in place.

Furthermore, even in a boiler that directly supplies hot water heated in the combustion chamber or does not circulate steam, the electrodes 1 and 2 or the water activation device unit 11 are provided on the hot water or steam supply side. It doesn't matter.

[0031]

[Effect of device]

 According to the present invention, the electrodes are arranged opposite to each other in the water supply passage, and the polarity inversion driving means for applying the polarity inversion voltage to the electrodes is provided. Is applied to activate the water passing through the water supply passage, and by eliminating the uneven distribution of ions in the water, scale growth can be suppressed. It is possible to prevent the inner wall of the passage and the combustion chamber from adhering to the heating part, etc., and the scale adheres to the inner wall of the water supply passage, making it difficult for water to be supplied, and the scale adhering to the heating part causes heating. When the water passing through the heating section is heated in the combustion chamber, it is prevented that the heating efficiency of the water is lowered and the fuel consumption is lowered, and it requires almost no troublesome maintenance such as cleaning of the heating section. , Moreover, it is possible also to prolong the life of the boiler.

[Brief description of drawings]

FIG. 1 is a cross-sectional configuration diagram showing an embodiment of a boiler with an electrode-type water treatment device according to the present invention.

FIG. 2 is a block diagram showing a control device of the above embodiment.

FIG. 3 is an explanatory diagram showing a pulse current flowing between electrodes when a polarity reversal voltage is applied to the electrodes.

FIG. 4 is an explanatory view showing another embodiment of the boiler with an electrode-type water treatment device of the present invention.

FIG. 5 is an explanatory diagram showing an example of a conventional boiler.

[Explanation of symbols]

 1, 2 electrodes 5 rectangular pulse oscillation circuit 9 pipe 10 water supply pipe 12 steam supply unit

Claims (1)

[Scope of utility model registration request] 1. In a boiler provided with a combustion chamber, which heats water passing through the combustion chamber, and supplies the heated hot water as it is or in the form of steam, water supply introduced into a heating section by the combustion chamber. A boiler with an electrode-type water treatment device, characterized in that electrodes are arranged to face each other in a passage, and a polarity reversal drive means for applying a polarity reversal voltage to the electrodes is provided.