JP2009172535A - Neutralization device and combustion apparatus equipped with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a neutralization device which can adequately prevent clogging due to dirt and the like, and a combustion apparatus equipped with the neutralization device. <P>SOLUTION: The neutralization device 70 which is installed in the combustion apparatus having a combustion means and piping supplying a fluid heated by the combustion means and neutralizes drain generated when latent heat of exhaust gas generated by accompanying combustion in the combustion means is recovered by a latent heat recovering heat exchanger, is provided with a drain receiving part 57 for receiving the drain, a neutralizing machine 90 accommodating a neutralizer and introducing the drain into it to neutralize the drain, and a dirt remover 80 disposed between the neutralizing machine and the drain receiving part for removing dirt in the drain before entering the neutralizing machine. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a neutralizing device for neutralizing drain (water) generated along with latent heat recovery in a latent heat recovery type hot water supply device, and a combustion apparatus including the neutralizing device.

  In recent years, in addition to a primary heat exchanger heated by a combustion device, a secondary heat exchanger that recovers latent heat of combustion exhaust that has heated the primary heat exchanger when performing additional combustion and / or hot water supply combustion in a bath That is, a hot water supply apparatus having a latent heat recovery heat exchanger has been developed (see Patent Document 1).

  In the hot water supply apparatus disclosed in Patent Document 1, a tray 14 as a drain receiver is disposed between the primary heat exchanger 12 and the secondary heat exchanger 13. The tray 14 receives drain (water) generated when the latent heat is recovered by the secondary heat exchanger 13. This drain is a condensed water vapor in the combustion exhaust gas, and is an acidic water having a pH of 2.5 to 3. If drained as it is, it will dissolve concrete or cause metal corrosion.

Therefore, in Patent Document 1, drain accumulated in the tray 14 is guided to the neutralizer 30 via the drain pipe 15.
A neutralizer is contained in the neutralizer 30, and drainage is neutralized and drained.

JP2007-120869A

FIG. 3 is an explanatory view showing an example of the neutralizer 30 of the latent heat recovery type hot water supply apparatus as in Patent Document 1.
Drain from the tray 14 is led into the neutralizer 30 through the drain pipe 15, and the neutralizer 30 is filled with a large number of particles of calcium carbonate 31 as a neutralizer. Note that the calcium carbonate used may actually be much smaller than the illustrated particle size.
The drain introduced into the neutralizer 30 is neutralized in the process of passing between the calcium carbonate particles 31.

By the way, dust or dust that has entered from the exhaust port of the instrument may be mixed into the drain due to the influence of wind or the like. When this dust is carried to the neutralizer 30 together with the drain, it is considered that the gap between the calcium carbonates 31 is filled and the flow of the drain is inhibited in the neutralizer 30. As a result, it is detected by the sensor unit arranged in the drain pipe and an error is displayed.
Moreover, it is not easy to remove dust and the like once clogged between calcium carbonate particles.
Therefore, the present applicant has made various studies such as the particle size of calcium carbonate, but has not found a definitive solution.

  This invention was made in order to solve the above-mentioned subject, and it aims at providing the neutralization apparatus which can prevent appropriately clogging with garbage etc., and a combustion apparatus provided with such a neutralization apparatus. It is said.

  In the first invention, the above object is provided in a combustion device including combustion means and piping for supplying a fluid heated by the combustion means, and the exhaust gas generated by the combustion of the combustion means is generated. In a neutralizing device for neutralizing drain generated when recovering latent heat by a latent heat recovery heat exchanger for recovering latent heat, a drain receiving portion for receiving the drain, and a neutralizing agent in the interior, the drain is A neutralizer for guiding and neutralizing, and a dust remover disposed between the neutralizer and a drain receiving portion, for removing dust in the drain before entering the neutralizer; This is achieved by a neutralizer comprising:

According to the above configuration, by arranging the dust remover in front of the neutralizer, the dust mixed in the drain is not brought to the neutralizer, and the situation where the neutralizer is clogged is effectively avoided. Can do.
In particular, since the dust remover is provided separately from the neutralizer containing the neutralizing agent, it is devised so that dust does not enter the neutralizer. The dust remover can throw away the collected dust as appropriate, and is easy to maintain.

According to a second aspect of the invention, in the configuration of the first aspect of the invention, the dust remover has a water seal structure so that the exhaust gas from the drain receiving portion does not pass downstream of the dust remover. .
According to the above configuration, since the water seal structure is provided in the main body of the dust remover, the dust is reliably held in the dust remover. Further, the exhaust gas does not leak downstream through the drain pipe.

According to a third aspect of the present invention, in the configuration of the first or second aspect of the invention, the dust remover includes a structure for preferentially capturing each of heavy and light wastes than the drain water mixed in the drain water. It is characterized by being.
According to the said structure, since the capture | acquisition structure which sorts and processes refuse is provided, it is excellent also from a viewpoint on durability.

According to a fourth invention, in the configuration of any one of the first to third inventions, an air vent hole is provided in communication with the downstream space of the water seal structure, and an air vent hole is provided above the neutralizer. The drain water easily flows from the dust remover to the neutralizer.
According to the above configuration, the drain pipe is appropriately drained without increasing the resistance of the drain pipe.

According to a fifth aspect of the present invention, there is provided a combustion apparatus comprising a combustion means and a pipe for supplying a fluid heated by the combustion means, wherein the primary heat exchanger is heated by the combustion of the combustion means. A latent heat recovery heat exchanger which is a secondary heat exchanger for guiding the fluid before entering the primary heat exchanger and recovering the latent heat of the exhaust gas generated by the combustion of the combustion means, A neutralization device that guides the drain that is generated when the latent heat is recovered by the latent heat recovery heat exchanger and neutralizes the drain, the neutralization device contains a neutralizing agent therein, and A neutralizer for introducing and neutralizing the drain, and a dust remover that is disposed in the front stage of the neutralizer and removes dust in the drain before being sent to the neutralizer. This is achieved by the combustion device.
According to the above configuration, as described in the first invention, the dust mixed in the drain is not brought to the neutralizer, and the situation where the neutralizer is clogged can be effectively avoided, and appropriately It is possible to provide a latent heat recovery type combustion apparatus that can drain water.

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
The embodiments described below are preferable specific examples of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention is particularly limited in the following description. As long as there is no description of the effect, it is not restricted to these aspects.

In the figure, a combustion device 40 is a hot water supply device in this embodiment, and the combustion device 40 has a main body 41 formed of an equipment case or the like. A tub 42 and a neutralization device 70 are connected to the combustion device 40, and the neutralization device 70 may be accommodated in the main body 41 or disposed outside the main body 41.
A burner 53, a primary heat exchanger 54, and a secondary heat exchanger (latent heat recovery heat exchanger) 56 are accommodated in the combustion chamber 43 of the combustion apparatus 40, and immediately below the secondary heat exchanger 56. A tray 57 as a drain receiving portion is disposed.
A gas pipe 51 is connected to the burner 53 so that fuel gas is supplied via a gas proportional valve 52.

The primary heat exchanger 54 is provided with a hot water supply pipe 44 and a follow-up pipe line 58, and a large number of fins 54a for heat exchange are attached to these pipes. The primary heat exchanger 54 absorbs the sensible heat of the combustion gas heated by the burner 53 and heats the fluid in the piping.
The secondary heat exchanger 56 is a heat exchanger for recovering latent heat, and is provided at a position in contact with the combustion exhaust after the primary heat exchanger 54 is heat-exchanged by combustion of the burner 53. For example, In this embodiment, it is positioned immediately upstream of the primary heat exchanger 54 and upstream of the exhaust passage 75. The secondary heat exchanger 56 also includes a large number of fins 56a.
Thereby, the secondary heat exchanger 56 absorbs the latent heat in the combustion exhaust gas by heat exchange, and heats the hot water flowing in the hot water supply pipe 44.
In addition, these 1st, 2nd heat exchangers can also be comprised so that a fin may not be provided.

In the tray 57 immediately below the secondary heat exchanger 56, water vapor present in the combustion exhaust is condensed on the surface of the secondary heat exchanger 56 having a low temperature, and dripped drain (water) is accumulated. This drain contains nitrogen oxides and becomes acidic drain water. This drain is guided to the neutralization device 70 through the drain pipe 76, neutralized by the neutralization device 70, guided to a drainage means (not shown), and discarded without causing harm to the environment.
The detailed configuration of the neutralizer 70 will be described later.

In the hot water supply pipe 44, the clean water that has entered from the water intake pipe 45 is first guided to the secondary heat exchanger 56, heated by latent heat recovery, and the heated hot water is further guided to the primary heat exchanger 54. The hot water heated by the primary heat exchanger 54 is discharged from the hot water outlet pipe 47 through the hot water tap 48 at a predetermined temperature.
In addition, a bypass pipe 46 is provided in the water inlet pipe 45 and the hot water outlet pipe 48, and heated hot water and clean water are mixed so that the hot water is adjusted to a predetermined temperature and discharged.

  The follow-up pipe 58 is a circulation pipe including a forward pipe 58b in which the hot water heated by the primary heat exchanger 54 is directed to the bathtub 42, and a return pipe 58a from the bathtub 42 to the appliance. The return pipe 58a includes a return pipe 58a. A bath thermistor 74 and a circulation pump 71 are provided. Thereby, the circulation pump 71 can be driven, the residual water of the bathtub 42 can be drawn in, and bathtub temperature can be controlled now.

The combustion device 40 of the present embodiment is configured as described above. Next, an embodiment of the neutralization device 70 will be described with reference to FIG.
The neutralizer 70 includes a neutralizer 90 that neutralizes acidic drain, and a dust remover 80 that is provided in front of the neutralizer 90. All or part of the neutralizing device 70 may be accommodated in the main body 41 of the combustion device 40. Alternatively, the entire neutralizing device 70 may be disposed in an indoor bathroom or the like by being connected to the combustion device main body 41 exposed outdoors or partially outdoors.

First, the neutralizer 90 will be described.
The neutralizer 90 includes a vertically or horizontally long container 91 or box-shaped main body 91. The main body 91 is formed of, for example, a molded product of a synthetic resin such as polyethylene and the like, and in accordance with a place where the main body 91 is installed, the waterproofness and necessary heat resistance, mechanical durability, etc. are taken into consideration. Material is selected.
Further, the main body 91 has a volume capable of sufficiently neutralizing the drain by containing a neutralizing agent therein.

In this embodiment, the main body 91 uses a vertically long hollow plastic container.
Near the upper end of the main body 91 of the neutralizer 90, a drain introduction port 93 to which a drain pipe 92 extending from a dust remover 80 described later is connected is provided.
A ventilation port 95 is provided at a position higher than the drain introduction port 93, and the ventilation port 95 is formed at a location facing the drain introduction port 93, or is provided at or near the neutralizer filling port 99.
A drain discharge port 96 is formed at a position slightly lower than the drain introduction port 93.
Thereby, the drain introduced into the main body 91 from the drain introduction port 93 is configured to realize a water seal structure in which the drain is accumulated in the neutralizer 90 at a position lower than the drain discharge port 96 as shown in the figure.

A baffle plate 98 is provided in the main body 91 so as to extend in the vertical direction substantially at the center thereof and separate the left and right regions in the figure. The lower end of the baffle plate 98 is opened. That is, a space 98 a is provided below the baffle plate 98. Accordingly, the drain bypasses the baffle plate 98 and passes through the space 98a below the baffle plate 98, and the path length of the drain passage path in the main body 91 is made as long as possible. . Thus, if the neutralizing agent 97 is filled in the main body 91, the drain introduced into the main body 91 from the drain introduction port 93 passes through the gap of the neutralizing agent 97 and proceeds through a long path while the neutralizing agent 97 is passed. And the neutralization reaction proceeds for a predetermined time.
Here, the neutralizing agent 97 is preferably a calcium carbonate granule.

In addition, the upper region 94 of the baffle plate 98 is open so that air entering the main body 91 together with the drain from the drain introduction port 93 can be easily removed from the vent hole 95. Furthermore, a neutralizing agent filling port 99 is provided at the upper end of the main body 91 so that the neutralizing agent 97 that has been reduced in the course of use can be easily added.
When the upper region 94 of the baffle plate 98 is opened, it is convenient to fill the main body 91 with the neutralizing agent 97 introduced from the neutralizing agent filling port 99 without any deviation.

The neutralization device 70 of the present embodiment is provided with a dust remover 80 before the neutralizer 90.
That is, the drain pipe 76 that guides the drain accumulated in the tray 57 that receives the drain of the secondary heat exchanger 56 of the combustion apparatus is connected to the dust remover 80, and the drain from which the dust has been removed by the dust remover 80. Is guided to the neutralizer 90 described above.

The dust remover 80 includes a vertically or horizontally long container-like or box-shaped main body 81. The main body 81 is formed of, for example, a molded product of a synthetic resin such as polyphenylene sulfide (PPS) or polypropylene, and has waterproofness, necessary heat resistance, mechanical durability, and the like depending on the installation location. In consideration of the above, an appropriate material is selected.
Further, the main body 81 allows drain to pass through and remove dust, dust, etc. mixed in the drain in the main body 81 due to, for example, the influence of combustion exhaust in the combustion chamber 43 of FIG. A sufficient volume is provided.

In this embodiment, the main body 81 uses a horizontally long hollow plastic container.
Near the upper end of the main body 81 of the dust remover 80 and at the right end in the figure, a drain introduction port 88 to which a drain pipe 76 or its extension is connected is provided.
A drain discharge port 87 is formed at the end opposite to the drain introduction port 88 of the main body 81 and in the vicinity of the middle of the height dimension of the main body 81. Thereby, the drain introduced into the main body 81 from the drain introduction port 88 is configured to realize a water seal structure that accumulates in the main body 81 at a position lower than the drain discharge port 87 as shown in the figure.

  In the central portion of the horizontally long main body 81, a first baffle plate 82 is formed so as to stand upright from the bottom portion and extend in the vertical direction at a central portion of the horizontal dimension of the main body 81 or a position slightly to the left of the central portion. The region 82b above the upper end is open or communicated. Thus, the first baffle plate 82 is a wall that partitions the left and right spaces in the main body 81 with the first baffle plate 82 as a boundary, and the right space is a first trap 82a. .

A partition-like second baffle plate 83 that extends downward from the upper end of the main body 81 and extends vertically is provided at a position on the left side of the first baffle plate 82, and a region 83 b below the second baffle plate 83 is open. Or communicate.
A partition-like third baffle plate 84 that stands up from the bottom of the main body 81 and extends in the vertical direction is provided at a position from the left side of the second baffle plate 83, and an upper region 84 b is opened or opened. Communicate.
A water seal structure is realized by S1 between the first baffle plate 82 and the third baffle plate 84, and a second trap is formed.

A detection sensor 85 is provided in the vicinity of the upper end of the main body 81, that is, at a position higher than the water level formed by the water seal structure in the main body 81.
The detection sensor 85 is formed of, for example, an electrode having two contact points exposed in parallel near the upper end of the main body 81. When the drain water level rises in the main body 81 and these two contact points are submerged in the drain. Then, it is energized to detect a predetermined water level. Thereby, for example, in the combustion apparatus 40 of FIG. 1, an error is displayed, or a notification is given by a predetermined alarm or the like.

The detection sensor 85 is formed not on the neutralizer 90 side as in the present embodiment, but on the dust remover 80 side in the preceding stage, so that the above error display or the like is displayed in the drain neutralization process. More drainage can be sent into the neutralizer 70 until the time is reached.
In addition, a vent 86 is provided at the upper end of the main body 81 so as to open upward, for example.
Note that, if necessary, for example, attachment / detachment means may be provided at locations T1 and T2 in FIG. 2 so that the dust remover 80 can be maintained.
Alternatively, a detachable lid may be provided on the main body 81 so that dust collected inside can be removed.

The present embodiment is configured as described above. In the neutralizing device 70, the dust remover is disposed in front of the neutralizer 90, so that dust mixed in the drain is brought to the neutralizer 90. Therefore, it is possible to effectively avoid the situation where the neutralizer 90 is clogged.
In particular, since the dust remover 80 is provided separately from the neutralizer 90 in which the neutralizing agent 97 is accommodated, it is devised so that dust does not enter the gaps of the neutralizing agent that cannot be removed when entering. ing. The dust remover 80 can discard the collected dust as appropriate, and is easy to maintain.

As described above, since the dust remover 80 is provided with the trap in the main body 81, the dust is securely held in the trap within the dust remover 80 and stops in the dust remover 80, and neutralization in the subsequent stage. The container 90 is not transported.
Moreover, the trap has a first trap 82a and a second trap 83a communicating with the first trap 82a, and the first trap 82a has a larger space than the second trap 83a. I have to. In other words, the trap is a two-stage trap, so that it has an excellent dust capturing function.
In the lower portion of the first trap 82a, garbage heavier than the drain water is captured and held. However, the upper portion of the first trap 82a and the upper portion of the second trap 83a that follows the first trap 82a easily capture lighter dust than the drain water. .

FIG. 3 is a view showing a modified example of the dust remover included in the neutralizer 70.
In each of these figures, attention is paid to the difference between the water level and the water surface area due to the difference in height between the baffle plate 82 and the baffle plate 83.
In these drawings, the same reference numerals as those in the dust remover 80 in FIG. 2 have the same configuration, so that the duplicated explanation is omitted and the differences will be mainly described below.
In the dust remover 80-1 of FIG. 3A which is the first modification, the first baffle plate 82-1 is higher (larger) than the third baffle plate 84-1. For this reason, the 1st trap 82a becomes a method which can increase the quantity which catches heavy garbage (triangle | delta).
In this modification, the portion S2 subsequent to the first baffle plate 82-2 has a water seal structure.

FIG. 3B, which is a second modification, is an example in which the height of the baffle plate 82 and the baffle plate 83 is lower than the height of the drain outlet 87 that determines the draft surface of the main body. In the dust remover 80-2, the first baffle plate 82-2 is lower (smaller) than the third baffle plate 84-2. Moreover, the third baffle plate 84-2 is lower than the drain discharge port 87. The area where the garbage ○ which is lighter than the drain water is accumulated can be an area up to 83-2, and the amount of light garbage ○ can be increased. Since the height of the baffle plate 83 is low, the heavy garbage Δ overflowing from the first trap 82a spreads before and after the first baffle plate 82-2. In this modification, the height of each baffle plate is made lower than that of the drain discharge port 87. However, if the baffle plate 83 is made higher than the drain discharge hole 87, the height becomes the height of the water surface, so The amount can be increased, and the optimum embodiment of FIG. 2 is obtained.
In this modification, the entire range S3 has a water seal structure.

In the dust remover 80-3 of FIG. 3C which is a third modification, the third baffle plate 84-3 is configured to be higher than the height position of the drain discharge port 87, and The first baffle plate 82-3 is higher (larger) than the third baffle plate 84-3.
Thereby, the water level of the 1st trap 82a becomes high, and the 2nd trap 83a is also a comparatively deep water level. For this reason, the amount of heavy garbage Δ captured by the first trap 82a and the second trap 83a is maximized. In addition, there is a merit that light dust hardly passes through the baffle plate 83-3 due to buoyancy.
In this modification, a range S4 between the first baffle plate 82-2 and the third baffle plate 84-3 has a water seal structure.

The present invention is not limited to the embodiment described above.
The shapes of the dust remover and the neutralizer can be changed as appropriate. Further, the neutralizing device 70 may be entirely accommodated in the main body 41 which is a case of the combustion device 40, or may be accommodated integrally with the dust remover 80, or only the neutralizing device 70. Only the dust remover existing outside the case may be accommodated in the main body 41.
More traps may be formed in the dust remover 80. Further, the drain inlet may be provided not at the upper part but at the lower part of the side surface or at an intermediate position. In this case, it is desirable to prevent heavy garbage from colliding with the baffle plate 82 and passing over the baffle plate. It is possible to make the drain water swirl by changing the inflow angle so that the light and heavy garbage can be rotated so that they are gathered in the central portion and difficult to cross the baffle plate 82. It is also possible to provide a neutralizing agent inside to improve the neutralization function as appropriate or to extend the durability time.
Furthermore, a part of the configuration described in the embodiment may be combined with another configuration not described above.

The system diagram which shows embodiment of the combustion apparatus of this invention. Explanatory drawing which shows embodiment of the neutralization apparatus used for the hot water supply apparatus of FIG. The figure which shows the modification of a dust removal device. Explanatory drawing which shows an example of the conventional neutralizer.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 40 ... Combustion device, 44 ... Hot water supply piping, 54 ... Primary heat exchanger, 56 ... Secondary heat exchanger, 57 ... Receiving part (receiving tray), 70 ... Neutralization device 76 ... Drain piping, 80 ... Dust remover, 81 ... Main body, 82a ... First trap, 83a ... Second trap, 90 ... Neutralizer, 97 ..Neutralizing agent, 98 ... baffle plate

Claims (5)

The latent heat is provided by a latent heat recovery heat exchanger provided in a combustion device including a combustion means and a pipe for supplying a fluid heated by the combustion means, and recovers the latent heat of the exhaust gas generated by the combustion of the combustion means. In the neutralizer for neutralizing the drain generated when recovering
A drain receiving section for receiving the drain;
A neutralizer for containing a neutralizing agent inside and guiding the drain to neutralize;
A neutralization apparatus, comprising: a dust remover disposed between the neutralizer and a drain receiving portion, for removing dust in the drain before entering the neutralizer.   The neutralization apparatus according to claim 1, wherein the dust remover is formed with a water seal structure so that exhaust gas from the drain receiving portion does not pass downstream of the dust remover.   3. The neutralization according to claim 1, wherein the dust remover includes a structure that preferentially captures each of heavy and lighter garbage than drain water mixed in the drain water. apparatus.   By providing an air vent hole in communication with the downstream space of the water seal structure and providing an air vent hole at the top of the neutralizer, the drain water from the dust remover to the neutralizer can easily flow. The neutralization apparatus according to any one of claims 1 to 3. In a combustion apparatus comprising combustion means and piping for supplying a fluid heated by the combustion means,
A primary heat exchanger heated by combustion of the combustion means;
A latent heat recovery heat exchanger which is a secondary heat exchanger for guiding the fluid before entering the primary heat exchanger and recovering the latent heat of the exhaust gas generated by the combustion of the combustion means;
And a neutralizing device for guiding the drain generated when the latent heat is recovered by the latent heat recovery heat exchanger and neutralizing the drain.
The neutralizer
A neutralizer for containing a neutralizing agent inside and guiding the drain to neutralize;
A combustion apparatus comprising: a dust remover that is disposed in a front stage of the neutralizer and removes dust in the drain before being sent to the neutralizer.

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