JPH11277077A - Neutralization apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a neutralization apparatus for certainly neutralizing acidic condensed water and hard to generate the clogging of a flow channel of acidic condensed water. SOLUTION: In a neutralization apparatus 80 comprising vertical bent flow channels 86 formed by demarcating the interior of a neutralization treatment tank 81 by partition plates 85 and the neutralizing agent 83 charged in the bent flow channels 86, collection spaces 82 for a reaction product are provided to the lower parts of the bent flow channels 86. In this case, acidic condensed water introduced into the neutralization treatment tank 81 flows through the bent flow channels 86 within the tank demarcated by the partition plates 85 while comes into contact with the neutralizing agent to be subjected to neutralization treatment and the treated water is discharged from a drain port 89. The collection spaces 82 partitioned by a neutralizing agent bottom plate 84 having a large number of holes 88 are formed to the lower parts of the bent flow channels 86. As the neutralizing agent, calcium carbonate or magnesium carbonate is generally used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for neutralizing acidic condensed water, and more particularly, to a device for neutralizing acidic condensed water generated by a high-efficiency heat exchanger used for a hot water heater or the like.

[0002]

2. Description of the Related Art When highly efficient heat exchange is performed between a combustion gas generated from a burner or the like and a fluid such as water using a heat exchanger, acidic condensed water in which components in the combustion gas are dissolved. Is generated. If this acidic condensed water is drained as it is,
Water distribution pipes are corroded. Then, for example, Japanese Patent Laid-Open No. 6-32
The neutralizing device disclosed in Japanese Patent Publication No. 8084 is configured to introduce an acidic drain into a drain retention tank filled with a neutralizing agent, neutralize the drain, and then discharge the water.

[0003]

However, in the above-mentioned conventional apparatus, the reaction condensate generated by the neutralization treatment of the acidic condensed water, the dirt mixed in from the outside, the flow path of the acidic condensed water due to water scale, etc. There is a problem that is easily clogged. An object of the present invention is to solve the above-mentioned conventional problems and to provide a neutralizing device that reliably neutralizes acidic condensed water and that is less likely to clog the flow path even when reaction products and the like accumulate.

[0004]

In order to achieve the above-mentioned object, a neutralizing apparatus according to the present invention comprises a vertically bent flow path formed by partitioning the inside of a tank with a partition plate, and filling the bent flow path. The first feature of the neutralization device comprising a neutralizing agent is that a reaction product collection space is provided below the bent flow path.

According to the neutralizing device of the first aspect, the reaction products generated when the acidic condensed water is neutralized, and the garbage and water scale that have flowed into the bent flow path and temporarily stayed therein are gradually removed. The sedimentation and sedimentation in the collection space below the bent flow path causes no accumulation of reaction products and the like in the gaps between the neutralizing agents. Flows.

In order to achieve the above object, the neutralization device of the present invention, in addition to the above-mentioned first feature, is characterized in that a neutralizing agent is filled from the upward flow path to the downstream flow path of the bent flow path. The feature is.

According to the second aspect of the present invention, the acidic condensed water introduced into the neutralizing device first flows into the collection space below the bent channel without contacting the neutralizing agent, and then flows into the bent channel. Flows upward from below, and the neutralization process is started here. At the beginning of the neutralization process, a large amount of reaction product is generated, but since the neutralization process is started at the upward flow path immediately downstream of the collection space, the reaction product is located in the gap between the neutralizing agents. Sedimentation and accumulation in the collection space below the bent channel without accumulating on the surface. In addition, since the refuse that has entered the tank is settled in the collection space before coming into contact with the neutralizing agent, the bent flow path is less likely to be clogged.

In order to achieve the above object, the neutralizing device of the present invention, in addition to the above first and second features, further comprises a neutralizing agent filled in the curved flow passage, the particle diameter of which increases with increasing upstream. That is the third feature.

According to the third aspect of the present invention, the acidic condensed water is first neutralized with a neutralizing agent having a large particle size, but a large amount of reaction products are generated at the beginning of the neutralization treatment. . Therefore,
Filling the neutralizing agent with a large particle size upstream of the bent flow channel where clogging due to the adhesion of reaction products and dust is most likely to occur, the gap between the neutralizing agents also increases, and the reaction products and the inside of the tank Garbage and the like that have infiltrated into the tank tend to settle in the collection space below the bent channel.

In order to achieve the above object, the neutralizing device of the present invention, in addition to the first to third features, further comprises an opening for communicating adjacent collection spaces with each other in the partition plate. The fourth feature is that the water is drained from the space to the outside of the tank through a drain port.

According to the neutralizing device of the fourth aspect, most of the acidic condensed water flows in contact with the neutralizing agent through the curved flow path, and after being neutralized, is drained out of the tank. The part flows in a short-circuited manner in the bent channel through the opening provided in the partition plate, and is drained directly from the collection space to the outside of the tank. Therefore, when the water heater stops and the inflow of the acidic condensed water stops, the condensed water in the bent flow path is gradually drained, and the acidic condensed water does not stay in the bent flow path for a long time.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an overall configuration diagram when a neutralizing device of the present invention is used for a water heater, and FIGS.

In FIG. 1, a water heater 10 has a main heat exchanger 2 upstream and an auxiliary heat exchanger 4 downstream in a waste gas passage 7 above a burner 1 with a drain receiver 6 interposed therebetween. doing. Water supplied from tap water or the like is branched upstream of the main heat exchanger 2 and the auxiliary heat exchanger 4, and is passed through the water pipe 3 and the branch pipe 5. The water passed through the branch pipe 5 is supplied to the auxiliary heat exchanger 4
Then, the water passed through the water pipe 3 joins after being heated by the main heat exchanger 2 respectively, and is discharged from a hot water supply pipe (not shown). That is, the water passed through the branch pipe 5 is heated in the auxiliary heat exchanger 4 by the combustion gas that has been heated by the main heat exchanger 2. At this time, strongly acidic condensed water containing a combustion gas component is generated in the auxiliary heat exchanger 4. The acidic condensed water is collected by the drain receiver 6 disposed below the auxiliary heat exchanger 4, subjected to a neutralization treatment by the neutralization device 80, and then drained. Note that the flow rate of water between the main heat exchanger 2 and the auxiliary heat exchanger 4 can be adjusted by the flow control valve 9.

FIG. 2 is a sectional view showing a first embodiment of the neutralization device 80 of the present invention. The acidic condensed water introduced into the neutralization tank 81 divides the inside of the tank partitioned by the partition plate 85 into the neutralizing agent 8.
After flowing through the bent flow channel 86 while being in contact with 3, the water is neutralized and then drained from the drain port 89. A collection space 82 partitioned by a neutralizing agent bottom plate 84 having a large number of holes 88 is formed below the bent flow channel 86. In addition, calcium carbonate, magnesium, or the like is generally used as the neutralizing agent.

In the process of neutralizing acidic condensed water, reaction products such as calcium hydroxide are generated. In the present embodiment, the reaction products and refuse settle and accumulate in the collection space 82 below the bent channel 86 through the holes 88 of the neutralizing agent bottom plate 84, so that the reaction products and refuse become neutralizing agents 83. And the bent flow channel 86 is not easily clogged. Further, as shown in FIG. 2, when the acidic condensed water is filled with the neutralizing agent 83 such that the acidic condensed water contacts the neutralizing agent 83 for the first time when flowing upward through the bent flow channel 86, the intermediate condensate is immediately downstream of the collection space 82. Sum processing is started. Therefore, a large amount of reaction products generated at the beginning of the neutralization treatment are likely to precipitate and accumulate in the collection space 82. Further, clogging due to reaction products and dust tends to occur on the upstream side of the bent flow path 86 where the acidic condensed water first contacts the neutralizing agent 83, but as shown in FIG. As the particle size of the neutralizing agent 83 increases, the gap between the neutralizing agents also increases. For this reason, reaction products and dust are likely to settle in the collection space 82, and clogging of the bent flow path 86 can be prevented. In addition, by reducing the particle size of the neutralizing agent on the downstream side and ensuring the neutralizing performance, it is not necessary to increase the filling amount of the neutralizing agent, and the size of the neutralizing device is not increased.

FIG. 3 is a sectional view showing a second embodiment of the neutralization device 80 of the present invention. The acidic condensed water introduced into the neutralization tank 81 divides the inside of the tank partitioned by the partition plate 85 into the neutralizing agent 8.
After flowing through the bent flow channel 86 while being in contact with 3, the water is neutralized and then drained from the drain port 89. A collection space 82 partitioned by a neutralizing agent bottom plate 84 having a large number of holes 88 is formed below the bent flow channel 86. In the collection space 82, by providing an opening 87 in the partition plate 85, a part of the acidic condensed water flows in a short-circuited manner through the bent flow passage 86 through the opening 87, and the acid condensed water flows from the collection space 82 to the outside of the neutralization tank 81. Drained to In addition, the acidic condensed water flowing in a short circuit is small,
Before the water is finally discharged from the drain port 89 of the neutralization tank 81, the water flows through the bent flow path 86 and is mixed with the neutralized water, thereby affecting the neutralization performance of the neutralization device 80. Never. Further, as shown in FIG. 2, a drain port 89 of the neutralized water is provided at the upper part of the neutralization tank 81. Separately, the drain port of the acidic condensed water flowing short-circuited is neutralized as shown in FIG. It may be provided at the lower part of the processing tank 81 and merge and mix on the downstream side of each drain port.

Since the acidic condensed water is not generated while the water heater is stopped, the acidic condensed water stays in the curved flow passage 86. In the present embodiment, a part of the acidic condensed water is opened. Neutralization tank 8 from collection space 82 via section 87
Since the water is drained to the outside, the acidic condensed water does not come into contact with the neutralizing agent 83 for a long time. Therefore, while preventing wasteful consumption of the neutralizing agent 83,
Since the scale is difficult to adhere to the neutralizing agent 83, the bent flow path 8
6 is also unlikely to be clogged. Further, since the flow rate of the acidic condensed water drained in a short-circuit manner through the opening 87 when the water heater is stopped is small, the acid condensed water staying in the bent flow path 86 must be discharged to some extent until it is completely drained. It takes time.
By contact with the neutralizing agent 83 during this time, it becomes substantially neutral at the time of drainage, and the drain pipes and structures not shown are not corroded. Furthermore, when a neutralized water outlet is provided at the upper part of the neutralization tank 81, and a short-circuited acidic condensed water outlet is separately provided at the lower part, the acidic condensed water outlet is provided separately. If an opening / closing means such as an electromagnetic valve is provided in the apparatus and the electromagnetic valve is opened when the stop of the water heater continues for a predetermined time, the acidic condensed water remaining in the bent flow path 86 is reliably neutralized before draining. can do. In the neutralizing device 80 of FIG. 3, if the particle size of the neutralizing agent 83 on the upstream side of the bent flow path 86 is increased or the neutralizing agent 83 is filled from the upward flow path to the downstream side, Needless to say, the same effects as in the first embodiment are added.

In FIG. 2 and FIG. 3 showing the embodiment of the present invention, the neutralizer bottom plate 84 is installed horizontally with respect to the bottom of the neutralization tank 81, but the amount of reaction products and refuse accumulated is small. The collection space 82 on the upstream side of the large number of bent passages 86 may be installed slightly inclined so as to be large.

[0019]

With the above-described configuration, the neutralizing device of the present invention has the following effects. That is, according to the neutralization device of the first aspect, the reaction products generated in the curved flow path of the acidic condensed water, and the garbage and water scale that have flowed into the curved flow path and temporarily stayed there are lower in the bent flow path. The reaction condensate does not accumulate in the gaps between the neutralizing agents, and the acidic condensed water flows in the bent flow path while uniformly contacting the neutralizing agents. As a result, clogging of the bent flow path can be prevented, neutralization treatment can be stably performed, and deterioration of the neutralizing agent and uneven distribution of consumption can be prevented. Further, according to the neutralization device of the second aspect, the acidic condensed water introduced into the neutralization device first flows into the collection space below the bent flow channel without contacting the neutralizing agent, and then flows into the bent flow channel. Flows upward, where the neutralization process is started. At the beginning of the neutralization treatment, a large amount of reaction product is generated, but since the neutralization treatment is started immediately downstream of the collection space, the reaction product is likely to precipitate and deposit in the collection space. Furthermore, since the dust that has entered the bent flow path settles in the collection space before coming into contact with the neutralizing agent, it does not enter the gap between the neutralizing agents, and the bent flow path is less likely to be clogged. According to the neutralization device of the third aspect, the neutralization agent having a large particle size is filled in the upstream of the bent flow channel where clogging due to adhesion of reaction products and dust is most likely to occur. The gap between the agents also increases, preventing clogging,
Reaction products, dust, and the like are likely to settle in the collection space below the bent channel. According to the neutralization device of the fourth aspect,
Part of the acidic condensate flows short-circuited through the bent channel through the opening provided in the partition plate, and is drained from the collection space to the outside of the tank. Even if it stops, the acidic condensed water does not stay in the bent flow path for a long time, and wasteful consumption of the neutralizing agent can be prevented. Furthermore, since the acidic condensed water does not continue to stay in the bent flow path, it is difficult for scale to adhere to the neutralizing agent, and clogging of the bent flow path can be prevented.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a water heater using a neutralization device of the present invention.

FIG. 2 is a cross-sectional view showing a first embodiment of the neutralization device of the present invention.

FIG. 3 is a sectional view showing a second embodiment of the neutralization device of the present invention.

[Explanation of symbols]

 Reference Signs List 80 Neutralization device 81 Neutralization treatment tank 82 Collection space 83 Neutralizer 84 Neutralizer bottom plate 85 Partition plate 86 Bend channel 87 Opening 88 Hole

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Hidenori Hata 93, Edocho, Chuo-ku, Kobe City, Hyogo Prefecture Inside Noritz Co., Ltd. 72) Inventor Takahiro Matsuda 93 Noritsu, Edo-cho, Chuo-ku, Kobe City, Hyogo Prefecture (72) Inventor Ryoji Kutsuna 93 Noritsu, Edo-cho, Chuo-ku, Kobe City, Hyogo Prefecture Noritsu, Ltd. 93 Noritsu, Edocho, Chuo-ku, Kobe

Claims (4)

[Claims] In a neutralization device comprising a vertical flow path formed by partitioning the inside of a tank with a partition plate and a neutralizing agent filled in the flow path, a reaction is generated at a lower portion of the flow path. A neutralization device characterized by providing a space for collecting objects. 2. The neutralizing device according to claim 1, wherein the neutralizing agent is filled from the upward flow path to the downstream side of the bent flow path. 3. The neutralizing device according to claim 1, wherein the particle size of the neutralizing agent filled in the bent flow path is increased toward the upstream side. 4. The method according to claim 1, wherein an opening for connecting adjacent collection spaces to each other is provided in the partition plate, and the collection space is drained out of the tank through a drain port. Sum equipment.