JP5995072B2 - Neutralizing device and combustion device - Google Patents

Description

  The present invention relates to a neutralizer for neutralizing drain generated when the latent heat of a combustion gas is recovered by a latent heat recovery type combustion apparatus. Moreover, it is related with the combustion apparatus which attached such a neutralization apparatus.

  In recent years, in order to improve the heat exchange efficiency of heat generated when a combustion operation is performed with a burner, a latent heat recovery type combustion apparatus that recovers not only sensible heat of combustion gas but also latent heat has been widely used in the market. This latent heat recovery type combustion apparatus is equipped with a secondary heat exchanger that recovers latent heat in addition to a primary heat exchanger that mainly recovers sensible heat of combustion gas, and has high heat exchange efficiency. .

  In such a combustion apparatus, the combustion gas generated by performing the combustion operation with the burner is introduced into the secondary heat exchanger to recover the latent heat, so that the water vapor in the combustion gas introduced into the secondary heat exchanger is recovered. Becomes liquefied at low temperature and drainage is generated. At this time, the combustion gas contains nitrogen oxides (NOx) and sulfur oxides (SOx), and the generated drain exhibits a strong acidity. That is, in such a latent heat recovery type combustion apparatus, drainage having strong acidity is generated due to its structure.

  There is a concern that this acidic drain may have an adverse effect on the environment and the like if drained to the outside without being treated. For this reason, some latent heat recovery type combustion apparatuses are provided with a drain discharge system for guiding the drain to the outside, and a neutralization device for neutralizing acidic drain in the middle of the drain discharge system. In this type of combustion apparatus, since the drain generated in the secondary heat exchanger is neutralized by the neutralization apparatus and then drained to the outside, there is no adverse effect on the environment and the like.

  As such a neutralization apparatus, there exists a neutralization apparatus disclosed by patent document 1, for example. In the neutralization device disclosed in Patent Document 1, the drain introduction port is provided near the bottom of the neutralization device by extending the drain introduction pipe to the vicinity of the bottom of the neutralization device. By this, when the drain stored in the space where the drain introduction pipe is arranged acts as a drain trap for sealing the drain introduction port, the drain introduction port can be sealed with a stronger pressure. It has become.

  More specifically, in the neutralization device disclosed in Patent Document 1, in order to prevent inflow of combustion gas from the drain introduction pipe into the neutralization apparatus, the drain introduction port of the drain introduction pipe is blocked by the stored drain. It is structured to form a drain trap by sealing with water. And in the neutralization apparatus disclosed by patent document 1, more drains are located above a drain introduction port by extending a drain introduction pipe | tube to near the bottom of a neutralization apparatus. Thus, in the neutralization device disclosed in Patent Document 1, when a drain trap is formed, it is possible to cause more water pressure of the drain to act as the pressure of the drain trap. That is, according to the structure of the neutralization device disclosed in Patent Document 1, it is possible to form a drainage trap with high pressure resistance.

JP 2008-272654 A

  By the way, when drain flows from the drain introduction pipe into the neutralizing device, soot and dust may flow along with the drain. That is, soot generated by burning with the burner, dust or the like sucked together with the air when supplying the combustion air to the burner flows into the drain discharge system together with the drain by operating the combustion device. Sometimes.

  Further, in a combustion apparatus that burns kerosene with a burner, unburned kerosene may flow into the drain discharge system. More specifically, in a combustion apparatus that burns kerosene with a burner, the burning operation is performed by atomizing or vaporizing kerosene. At this time, kerosene that has not been burned for some reason among the injected kerosene may be mixed into the combustion gas and discharged to the secondary heat exchanger side. Then, this unburned kerosene may flow from the secondary heat exchanger side to the drain discharge system.

In the state where soot, dust and unburned kerosene flow into the neutralization device and are mixed into the drain stored in the neutralization device, bubbles are generated in the drain surface and in the liquid. If this happens, there is a problem that the bubbles accumulate without disappearing.
More specifically, when soot, dust, unburned kerosene, etc. are mixed in the drain, the viscosity of the drain increases. Here, the bubbles are formed when the drain is rounded with air inside, but when the viscosity of the drain becomes high, the air moves onto the liquid surface when the air enters the liquid. It becomes difficult to come off and bubbles are easily generated. Further, when the viscosity of the drain increases, the strength of the drain film that encloses the air when bubbles are formed increases. Then, the generated bubbles are difficult to disappear. That is, bubbles are likely to be generated, and the generated bubbles are difficult to disappear, so that bubbles inside the neutralizing device are accumulated.

  If air bubbles accumulate on the water surface of the drain in this way, there arises a problem that the liquid level detection means of the neutralization device cannot detect the exact drain liquid level. That is, in a state where bubbles are accumulated on the drain water surface, the bubbles are naturally positioned at a position higher than the drain water surface. And if the liquid level detection means attached to the neutralization device detects the position of this bubble as the height of the drain water surface, the water surface of the drain is in spite of the fact that the actual drain water surface is at a low position. Will be erroneously detected as having reached a predetermined height.

  Therefore, the present invention provides a neutralizing device capable of preventing the generation of bubbles on the water surface of the drain stored in the neutralizing device and accurately detecting the liquid level of the drain, and such a neutralizing device. It is an object of the present invention to provide a combustion apparatus provided.

The invention according to claim 1 for solving the above-mentioned problem is provided in a combustion apparatus having a burner and a heat exchanger that recovers latent heat of combustion gas generated by the combustion operation of the burner. A neutralization device for neutralizing generated drain and discharging the drain to the outside, wherein a storage part for storing drain is formed inside, and a predetermined amount of liquid is stored in the storage part A drain introduction pipe having a drain introduction port for introducing drain into the storage section is provided on the upper side, and is integrated with the drain introduction pipe below the drain introduction pipe. And a dripping prevention means for preventing the drain from dripping directly from the drain inlet to the liquid level of the liquid stored in the storage section, the dripping prevention means being a cylindrical shape located on the upper side The base end side and bottom A distal portion located is integrally formed with, those having an external opening to a state of being opened a portion of the side to the outside, the outer opening portion, at least the upper portion of the reservoir The upper end portion is positioned above the liquid level of the predetermined amount of liquid stored in the portion, and the inner peripheral surface of the proximal end portion and a part of the distal end portion are the proximal end portion and the distal end side. A continuous surface extending over the portion is formed, and the continuous surface is used in a state where the lower end portion is in contact with the liquid surface of the liquid stored in the storage portion, and the drain is transmitted along the continuous surface. It is a neutralization device characterized by flowing down to the storage part.

  The neutralization apparatus of the present invention includes a drip prevention means that forms a surface in which the inner peripheral surface of the cylindrical proximal end portion and a part of the distal end side portion are continuous, and travels along the continuous surface of the drip prevention means. The drain flows down to the storage part. Therefore, the drain does not drop directly from the high position on the water surface of the liquid stored in the neutralizer, and it is possible to prevent the generation of bubbles due to the water droplet of the drain falling on the water surface of the liquid. it can.

  Moreover, the neutralization apparatus of this invention has an external open part in the dripping prevention means, and is in the state by which a part of side was open | released with respect to the exterior. For this reason, even in a state where the liquid level of the reservoir is high, the air accumulated above the water surface of the drain stored in the reservoir and the drain newly flowing into the reservoir are replaced in the reservoir. Can do. That is, when the drain newly flows into the storage part, the external open part acts as an air vent hole for the air accumulated in the storage part. This makes it possible to uniformly raise the liquid level of the entire storage section as the drain flows.

Specifically, when the length of the drain introduction pipe is simply increased as in the prior art, and the lower end of the drain introduction pipe is brought into contact with the liquid level of the liquid stored in the storage section, the lower end of the drain introduction pipe is The water is sealed with the drain stored in the storage unit, and air is stored above the sealed storage unit. Thus, in a state where air has accumulated on the upper side of the sealed reservoir, new drain cannot be allowed to flow unless the accumulated air is discharged. That is, if further drainage is caused to flow in this state, there is a possibility that the drain is accumulated in a predetermined portion of the storage portion, for example, the drain is accumulated in the pipe for allowing the drain to flow. .
On the other hand, in the neutralization device of the present invention, the external open portion provided in the drip prevention means can act as an air vent hole for air accumulated in the storage portion. This makes it possible to uniformly raise the liquid level of the entire storage section as the drain flows.
As described above, according to the configuration in which the liquid level of the entire storage unit can be increased uniformly with the inflow of drain, the change in the liquid level is correctly detected regardless of the liquid level detected in any part of the storage unit. Since it can detect, the liquid level of a storage part can be detected accurately. That is, even if the liquid level detection means is arranged in any part of the storage part, the change in the liquid level can be accurately detected.

  According to a second aspect of the present invention, the external opening portion is formed in the base end side portion, and is a vent hole that communicates the inside and outside of the base end side portion, and is stored in the storage portion. The neutralization device according to claim 1, wherein the neutralization device is used in a state where the vent hole is located above the water surface of the liquid.

  According to this configuration, the vent hole is formed in the base end side portion which is higher than the tip end side portion, and this vent hole can act as an air vent hole for air accumulated in the storage portion. Therefore, even in a state where the liquid level of the entire storage unit is relatively increased, the liquid level of the entire storage unit can be increased uniformly.

  According to a third aspect of the present invention, the drain flows along a part of the side of the tip side portion, and the external open portion includes a portion of the side of the tip side portion through which the drain flows. The neutralizing device according to claim 1, wherein the neutralizing devices are provided in different portions.

  In such a configuration, since the external open portion is formed in a portion where the drain does not flow, the external open portion does not obstruct the flow of the drain when the drain flows in, and the drain can be smoothly flowed in.

  According to a fourth aspect of the present invention, the external opening portion is formed at the tip side portion, and is formed in a plurality of slit grooves extending along the vertical direction and / or at positions separated in the vertical direction. It is a through-hole of this, The neutralization apparatus in any one of the Claims 1 thru | or 3 characterized by the above-mentioned.

  According to such a configuration, the slit groove (or a plurality of through holes) acting as an air vent hole for the air accumulated in the storage portion is also formed in the tip side portion. Therefore, the liquid level of the whole storage part can be raised more reliably and uniformly.

  The neutralization apparatus according to any one of claims 1 to 4, wherein the tip side portion is substantially cylindrical and has a diameter that decreases toward the tip side. It is.

In such a configuration, the tip side portion of the dripping preventing means that comes into contact with the water surface of the stored drain is substantially cylindrical and has a narrow diameter. If it does in this way, when a soot and dust will flow into a storage part with drain, it can prevent that a soot and dust will spread widely in a storage part.
Specifically, in such a configuration, the portion of the drain surface stored in the storage portion that is in contact with the drain that has flowed into the storage portion is surrounded by the tip side portion of the drip prevention means. Can do. That is, the portion where the drain that has flowed into the storage portion comes into contact can be surrounded in a substantially annular shape by the narrow-side tip side portion. For this reason, when the soot and dust that flowed together with the drain reach the water surface of the stored drain and then diffuse radially outward, the tip side portion of the drip prevention means prevents soot and dust from diffusing. It acts as a wall surface. For this reason, it becomes possible to make a structure in which soot and dust are difficult to spread over a wide range of the storage part, and bubbles formed by drains mixed with soot and dust are generated over a wide range of the storage part. Can be suppressed.

In addition, the tip side portion of the drip prevention means is substantially cylindrical in this way, and according to the configuration that becomes narrower toward the tip side, it is possible to flow the drain more reliably along the continuous surface. Become.
Here, let us consider a case where the drip prevention means has a cylindrical shape extending along the vertical direction. At this time, if the neutralizing device is attached in a slightly inclined state due to a failure of the installation work of the installation worker, the drip prevention means will also be in an inclined state. At this time, if the continuous surface through which the drain flows is positioned on the upper side, the drain may drip from the continuous surface. That is, if the continuous surface through which the drain flows extends toward the lower side as it goes downward, it may be difficult to flow the drain along the continuous surface.
On the other hand, when the dripping prevention means gradually has a narrow diameter downward, the continuous surface for flowing the drain is an inclined surface extending from the radially outer side to the radially inner side as the height decreases. Become. Therefore, even if the neutralizing device is attached in a slightly inclined state, the continuous surface for flowing the drain is only in a state extending along the vertical direction, and the continuous surface for flowing the drain is directed downward. As a result, the state does not extend outward in the radial direction. For this reason, the drain does not drip from the continuous surface, and the drain can be reliably transmitted to the continuous surface.

  The invention according to claim 6 is characterized in that the storage portion into which drain flows from the drain inlet through the dripping prevention means is not filled with a neutralizing agent. The neutralization apparatus described in 1.

  According to such a configuration, since the neutralizing agent is not provided in the storage portion that flows in the drain via the dripping prevention means, the portion that becomes the discharge port for discharging the drain from the storage portion to the portion located on the downstream side The neutralizer is not clogged. Accordingly, it is possible to suppress the occurrence of a problem that the drain is not smoothly discharged in the storage part that flows in the drain through the dripping preventing means, and the liquid level in the storage part rises more than necessary.

  A seventh aspect of the present invention is a combustion apparatus comprising the neutralizing device according to any one of the first to sixth aspects.

The combustion apparatus of the present invention includes the neutralization apparatus according to any one of claims 1 to 6, and when drain is allowed to flow into the reservoir, the water droplets of the drain do not fall on the water surface from a high position. Therefore, generation | occurrence | production of the bubble resulting from the fall of the water droplet of a drain can be prevented.
And when making a drain flow in into a storage part, it is possible to raise the liquid level of the whole storage part uniformly with the inflow of drain. For this reason, even if the liquid level in any part of the reservoir is detected, the change in the liquid level can be accurately detected. Therefore, when the liquid level detecting means detects the liquid level in the reservoir, the accurate liquid level is detected. Can be detected.

The neutralization device of the present invention has a configuration in which drain flows down to the storage portion along the drip prevention means, and the drain may directly drop from a high position on the water surface of the liquid stored in the neutralization device. Absent. Therefore, the generation | occurrence | production of the bubble resulting from the water droplet of a drain falling on the water surface of a liquid can be prevented.
Further, in the neutralizing device of the present invention, the external open portion formed in the dripping preventing means acts as an air vent hole for the air accumulated in the storage portion, so that the liquid level of the entire storage portion can be evenly distributed as the drain flows in. Can be raised. As a result, the change in the liquid level can be detected correctly even if the liquid level is detected in any part of the storage part, so that the liquid level in the storage part can be accurately detected.
Since the combustion apparatus of the present invention can also accurately detect the liquid level inside the neutralization apparatus, various operations for draining can be performed with higher accuracy.

It is a block diagram which shows the combustion apparatus concerning embodiment of this invention. It is a partially broken perspective view which shows the neutralization apparatus of FIG. FIG. 3 is a perspective view showing a drain introduction pipe and a drain guide part of FIG. 2. It is explanatory drawing which shows the state at the time of operation | use of the neutralization apparatus of FIG. It is explanatory drawing which shows a mode that drain is introduce | transduced into the neutralization apparatus of FIG. It is explanatory drawing which shows a mode that a drain is introduce | transduced into the neutralization apparatus which employ | adopted the drain induction | guidance | derivation part different from this invention partially, and drain is introduced in order of (a), (b). It is explanatory drawing which shows a mode that a drain is introduce | transduced into the neutralization apparatus of FIG. 1, and a drain is introduce | transduced in order of (a), (b).

  Hereinafter, although the neutralization apparatus 15 concerning embodiment of this invention and the combustion apparatus 1 which incorporates this neutralization apparatus 15 are demonstrated in detail, this invention is not limited to these examples. In the following description, the positional relationship between front, rear, up, down, left and right will be described based on a normal installation state unless otherwise specified.

  As shown in FIG. 1, the combustion apparatus 1 includes a combustion unit 3 in a housing 2, a primary heat exchanger 4 that mainly recovers sensible heat, and a secondary heat exchanger 5 (heat) that mainly recovers latent heat. And a so-called latent heat recovery type combustion apparatus. Further, the combustion apparatus 1 includes a control device (not shown), and various control operations can be performed by controlling each device constituting the combustion device 1.

  The combustion unit 3 is configured to generate a high-temperature combustion gas by burning fuel supplied from the outside by a burner (not shown). In this embodiment, the burner (not shown) is a known gun type burner, and burns liquid fuel sprayed with pressure (using kerosene in this embodiment). Moreover, the burner of this embodiment is called what is called a reverse combustion type | mold, and can form a flame toward the downward direction.

In the combustion apparatus 1 of this embodiment, the combustion part 3 is located near the upper end of the housing 2, and the primary heat exchanger 4 is located below the combustion part 3. Furthermore, there is a storage case 7 for storing the secondary heat exchanger 5 below the primary heat exchanger 4, and the silencer 8 is located above the storage case 7 and to the side of the primary heat exchanger 4. . Further, an exhaust part 9 is provided above the muffler part 8.
And the space which connects each inside of the primary heat exchanger 4, the storage case 7, the muffling part 8, and the exhaust part 9 from the inside of the combustion part 3 is formed, and the combustion gas generated in the combustion part 3 can flow. Yes.

  Therefore, when the combustion apparatus 1 is operated, the combustion gas generated in the combustion unit 3 flows to the primary heat exchanger 4, the storage case 7, and the muffler unit 8, and reaches the exhaust unit 9. And it is discharged | emitted from the exhaust port of the exhaust part 9 outside. On the other hand, hot water supplied from the outside is supplied to the secondary heat exchanger 5 via a water inlet pipe (not shown). And hot water flows into the primary heat exchanger 4 through the secondary heat exchanger 5. At this time, hot water is heated by the heat of the combustion gas recovered by the secondary heat exchanger 5 and the primary heat exchanger 4. And the heated hot water flows out from the water outlet of the primary heat exchanger 4, and is supplied toward the curan, a bathtub, etc. used as a hot-water supply destination.

  Here, as described above, since the secondary heat exchanger 5 mainly recovers latent heat of the combustion gas, in the secondary heat exchanger 5, the temperature of the combustion gas is lowered to a certain value or less. As a result, water vapor contained in the combustion gas is liquefied and drainage is generated. The generated drain is exposed to the combustion gas, so that nitrogen oxides and sulfur oxides generated by combustion dissolve and exhibit acidity.

  Therefore, the combustion apparatus 1 of the present embodiment has a configuration including a drain discharge system 6 for neutralizing the generated drain and discharging it to the outside.

  The drain discharge system 6 includes a drain discharge portion (not shown) formed at the bottom of the storage case 7, an upstream piping member 14, a neutralization device 15, and a downstream piping member 16 in order from the upstream side in the drain flow direction. It is constituted by.

  At this time, the internal space of the neutralization apparatus 15 is divided into a plurality of spaces by the partition walls, and each space functions as a storage tank for storing drain. Moreover, the neutralizing agent is filled into at least one or more storage tanks. And the drain which flowed into the neutralization apparatus 15 flows through these several storage tanks sequentially. At this time, in each storage tank, the drain that has flowed into the storage tank once stays and flows out of the space when the liquid level exceeds a certain level. That is, the drain that has flowed into the neutralizing device 15 flows out after remaining in the respective storage tanks in the neutralizing device 15 for a predetermined time. Therefore, when the drain passes through the space filled with the neutralizing agent, it slowly passes over time. Further, the drain is neutralized by reacting with the neutralizing agent while remaining in the storage tank filled with the neutralizing agent.

  That is, the drain that has flowed into the neutralizing device 15 is stored in the neutralizing device 15 for a predetermined time, and is neutralized by reacting with the neutralizing agent while being stored. The neutralized drain flows to the discharge port of the neutralization device 15 and is discharged from the discharge port of the neutralization device 15 to the outside of the housing 2 through the downstream side piping member 16.

  Here, the neutralizing device 15 which is a characteristic component of the present invention will be described in detail.

  As shown in FIG. 2, the neutralization device 15 is a box-shaped member and can store a liquid (drain) therein. More specifically, the internal space of the neutralization device 15 is, from the upstream side in the drain flow direction, the first storage tank 20 (storage section), the second storage tank 21, the third storage tank, the fourth storage tank,.・ ・ Etc., it is divided into multiple storage tanks. In addition, detailed illustration is abbreviate | omitted about the storage tank after a 3rd storage tank.

In addition, a drain introduction pipe 25 for introducing drain into the first storage tank 20 and an electrode installation portion 26 are provided in a portion forming the first storage tank 20.
Furthermore, a wall-shaped first partition portion 23 extending in the vertical direction is provided at a portion that becomes a boundary between the first storage tank 20 and the second storage tank 21.

The drain introduction pipe 25 is a cylindrical pipe body extending along the vertical direction, and protrudes upward from the top surface of the neutralization device 15. The end opening of the drain introduction pipe 25 functions as a drain introduction port for introducing drain into the neutralization device 15.
Here, in the present embodiment, the drain guide portion 30 (the dripping prevention means) that prevents the dripping of the drain onto the liquid level of the drain stored in the first storage tank 20 is integrated with the drain introduction pipe 25. Is formed. The drain guide unit 30 will be described in more detail.

As shown in FIG. 3, the drain guide portion 30 is a substantially cylindrical portion formed integrally with the drain introduction tube 25. More specifically, it is formed by a base end side portion 32 continuous with the drain introduction pipe 25 and a tip end side portion 33 continuous with the base end side portion 32. That is, the drain introduction tube 25, the proximal end portion 32, and the distal end portion 33 form one cylindrical body, and the outer shape of the cylindrical body is substantially cylindrical. And the drain introduction pipe | tube 25, the base end side part 32, and the front end side part 33 are juxtaposed in order toward the other end part side from the one side edge part side of this cylindrical body in the longitudinal direction.
Therefore, the base end side portion 32 is located between the drain introduction tube 25 and the tip end side portion 33, the one side end portion in the longitudinal direction and the drain introduction tube 25 are continuous, and the other end in the longitudinal direction. The portion and the tip end portion 33 are in a continuous state.

The inner hole of the drain introduction pipe 25 and the inner hole of the drain guiding part 30 are in a continuous state, and the inner peripheral surface of the drain introducing pipe 25 and the inner peripheral surface of the drain guiding part 30 form the same plane. doing. Therefore, the inner peripheral surface of the drain introduction pipe 25, the inner peripheral surface of the proximal end portion 32, and the inner peripheral surface of the distal end portion 33 form the same plane.
Further, the drain guide portion 30 has a gradually decreasing diameter from the proximal end portion 32 side toward the distal end portion 33, and the distal end side from the radial length L1 of the proximal end portion 32 at a predetermined position. The length L2 in the radial direction at a predetermined position of the portion 33 is shortened. As a result, a space formed inside the drain guiding portion 30, that is, a space formed inside the proximal end side portion 32 and a space formed inside the distal end side portion 33 are continuously formed. The space is also gradually narrowed from the proximal end portion 32 side toward the distal end portion 33.

  A vent hole 35 is formed on the side surface of the base end side portion 32 to communicate the inside and outside of the base end side portion 32. The vent hole 35 is a through hole whose opening shape is substantially circular, and penetrates the side surface of the base end side portion 32 in the member thickness direction.

A slit groove 36 (external opening portion) is formed on the side surface of the distal end portion 33 so as to extend from one end portion side in the longitudinal direction of the distal end portion portion 33 to the other end portion side. Of the end portions of the slit grooves 36 in the extending direction, the opening shape is rounded at the end portion from the base end side portion 32. More specifically, the opening shape at one end portion in the longitudinal direction of the slit groove 36 is rounded and convex toward the proximal end portion 32 side.
The space formed inside the tip end portion 33 is continuous with the outside by the slit groove 36. In other words, the space formed inside the tip end portion 33 is in a state of being open to the outside at a part in the circumferential direction.

  Here, the portion where the vent hole 35 (external opening portion) of the base end portion 32 is formed and the portion where the slit groove 36 of the tip end portion 33 is formed are in the circumferential direction of the drain guide portion 30. The position is the same. That is, the vent hole 35 and the slit groove 36 are parallel to each other with an interval along the longitudinal direction of the drain guide portion 30. In other words, the vent hole 35 is formed at a position away from the slit groove 36 toward the drain introduction pipe 25 side.

  As shown in FIG. 2, the electrode installation portion 26 is provided with a plurality of electrode mounting holes that penetrate the portion forming the top surface of the neutralizing device 15 in the thickness direction (vertical direction). Electrode mounting holes (not shown) are arranged at intervals. More specifically, four electrode mounting holes (not shown) are arranged in a matrix, and electrodes 28 having different lengths are inserted into the respective electrode mounting holes. Note that the four electrodes 28 respectively inserted into electrode mounting holes (not shown) function as liquid level detection means for detecting the liquid level of a drain or the like stored in the first storage tank 20.

  More specifically, when the liquid level of drain or the like stored in the first storage tank 20 rises, the longest electrode 28 (hereinafter referred to as the ground electrode 28) among the four electrodes 28 having different lengths. ) And other electrodes 28 are immersed in a liquid such as drain. Then, the ground electrode 28 and the other electrodes 28 are energized through a liquid such as drain. And the liquid level of the 1st storage tank 20 is detected by specifying the electrode 28 which supplied with the ground electrode 28 and electricity.

  As shown in FIG. 2, the first partition 23 is located between the first storage tank 20 and the second storage tank 21 and divides them, and is downward from the top surface side of the neutralization device 15. Are formed by a hanging wall portion 23a extending toward the bottom and a standing wall portion 23b extending upward from the bottom surface side. Here, the lower end of the hanging wall portion 23a and the upper end of the standing wall portion 23b are in a state of facing each other with a space therebetween. In other words, the slit-shaped first storage tank communication hole 40 is formed between the hanging wall portion 23a and the standing wall portion 23b.

  The first storage tank communication hole 40 is located in the vicinity of the bottom surface of the neutralization device 15 and extends from the front side to the back side of the neutralization device 15. The storage tank 21 is communicated.

That is, between the first storage tank 20 and the second storage tank 21, the drooping wall portion 23a and the standing wall portion 23b prevent the liquid such as drain from moving in the vertical direction. In addition, only liquid such as drain that has passed through the first storage tank communication hole 40 can move between the first storage tank 20 and the second storage tank 21. That is, between the first storage tank 20 and the second storage tank 21, the liquid such as drain can be moved only at a portion slightly above the bottom surface.
Although detailed explanation is omitted, between the second storage tank 21 and the third storage tank (not shown), between the third storage tank (not shown) and the fourth storage tank (not shown). ... Are also provided with a partition, and a liquid such as drain can be circulated only through a communication hole provided at a predetermined height of each partition. And the position of the communicating hole formed in each partition part is not necessarily the same height, and has different heights as appropriate.

  Next, the operation when drain is introduced into the neutralization device 15 of the present embodiment will be described in detail.

When the neutralization device 15 of the present embodiment is built in the combustion device 1 and used, as described above, the upstream piping member 14 is interposed between the storage case 7 and the neutralization device 15 (FIG. 1). The upstream casing member 14 communicates with the storage case 7 and the neutralizer 15. More specifically, one end of the upstream piping member 14 is attached to the storage case 7, and the other end is attached to the drain introduction pipe 25 (see FIG. 2) of the neutralizing device 15. The drain discharged from the storage case 7 flows through the upstream piping member 14, passes through the inner hole of the drain introduction pipe 25, and flows into the neutralizing device 15.
Here, when hot water or the like is heated by the combustion device 1, the combustion gas passes through the storage case 7 that stores the secondary heat exchanger 5. At this time, the combustion gas may flow from the storage case 7 into the upstream piping member 14.

  Therefore, in the neutralization device 15 of the present embodiment, even if the combustion gas flows in the upstream side piping member 14 and flows into the neutralization device 15, the combustion gas that has flowed into the neutralization device 15 remains. A drain trap can be formed in the neutralizing device 15 so as not to flow downstream in the drain flow direction in the drain discharge system 6, that is, downstream of the downstream piping member 16 (see FIG. 1).

  That is, in the combustion apparatus 1 of the present embodiment, when a sufficient amount of drain is not stored in the neutralizer 15 as at the start of operation, the water injection operation of pouring hot water or the like into the neutralizer 15 To form a drain trap and then start operation.

When a predetermined amount or more of liquid is injected into the neutralization device 15, when drain is newly introduced, the drain corresponding to the amount of the drained water is discharged from the neutralization device 15 to the downstream piping member. 16 will be discharged to the outside. For this reason, when the neutralizer 15 is operated, the neutralizer 15 is operated in a state where a liquid level of a predetermined height or more is maintained.
From this, when the neutralizer 15 is used, as shown in FIG. 4, a predetermined amount or more of liquid is also stored in the first storage tank 20, and a liquid level (hereinafter simply referred to simply as “high”). (Also referred to as a reference liquid level) is maintained.

  Here, in this embodiment, among the storage tanks of the neutralization device 15, an appropriate storage tank among the storage tanks after the second storage tank 21 is filled with a neutralizing agent. That is, the first storage tank 20 is not filled with a neutralizing agent. If it does in this way, it will become possible to prevent clogging of the 1st storage tank communication hole 40 more certainly. That is, unlike the case where the first storage tank 20 is filled with the neutralizing agent, when the drain flows from the first storage tank 20 side to the second storage tank 21 side, the neutralizing agent in the first storage tank 20 is It does not flow with the drain and close the first storage tank communication hole 40. For this reason, the drain does not flow smoothly into the second storage tank 21, so that the liquid level of the first storage tank 20 does not rise more than necessary. Therefore, the reference liquid level is stably maintained in the first storage tank 20.

  Furthermore, when using the neutralization apparatus 15, as shown in FIG. 4, the drain guide part 30 is in a state extending along the vertical direction, and is directed downward from the top surface of the first storage tank 20. It is in a protruding state. At this time, the lower end side of the drain guide part 30 is in a state positioned below the reference liquid level. More specifically, the lower part of the slit groove 36 is located below the reference liquid level, and the upper part is located above the reference liquid level. Accordingly, the vent hole 35 is also located above the reference liquid level. Specifically, the vent hole 35 is located in the vicinity of the top surface of the first storage tank 20.

  Further, the upstream side piping member 14 connected to the upstream side of the neutralizing device 15 has a horizontal fall pipe portion 14a extending in a direction including a horizontal direction component and an upright pipe portion 14b extending in a direction including a vertical direction component. doing. Specifically, the upstream side piping member 14 extends in the vertical direction (from the upper side to the lower side in FIGS. 1 and 4) after extending in the horizontal direction (from the left side to the right side in FIG. 4). The lateral fall tube portion 14a located on the side and the lateral fall tube portion 14a located on the distal end side in the extending direction are continuous. In other words, the upstream side piping member 14 extends toward the neutralizing device 15, and the distal end portion in the extending direction is bent downward.

  When the drain flows from the upstream side piping member 14 to the neutralization device 15 side, as shown in FIG. 5, the drain that has flowed downward in the side wall tube portion 14a is the inner peripheral surface of the upright tube portion 14b. It flows down along the part located on the side of the. That is, since the drain usually flows intermittently little by little to the neutralization device 15 side, it will flow little by little on the lower side portion of the horizontal fall tube portion 14a. Then, the drain enters the upright pipe portion 14b from the lateral fall pipe portion 14a and flows along the inner peripheral surface of the upright pipe portion 14b extending in the vertical direction.

Here, the inner lower surface of the horizontal inverting tube portion 14a and a part of the inner peripheral surface of the upright tube portion 14b (portion located on the left side in FIG. 5) are continuously in a direction along the drain flow direction. ing. And the internal upper surface of the horizontal inversion pipe part 14a and the other part (the part located on the right side in FIG. 5) of the inner peripheral surface of the upright pipe part 14b are continuous in the direction along the drain flow direction. It has become.
Then, the drain flows along a portion of the inner peripheral surface of the upright pipe portion 14b that is continuous in the direction along the flow direction of the drain with the inner lower surface of the horizontal inversion pipe portion 14a.

  That is, the drain flows along a portion (a portion located on the left side in FIG. 5) that is unevenly distributed on one side of the inner peripheral surface of the upright pipe portion 14b. In addition, the part through which the drain flows is the part located closest to the upstream end (the left end in FIG. 5) of the horizontal fall tube part 14a in the inner peripheral surface of the upright pipe part 14b, and the part located in the vicinity thereof. Become.

The drain that has reached the lower end of the upright pipe portion 14b flows into the drain introduction pipe 25 and flows along the inner peripheral surface of the drain introduction pipe 25 positioned on the lower side as it is. That is, the drain flows in a part of the inner peripheral surface of the drain introduction pipe 25 and located below the part where the drain flows in the upright pipe portion 14b.
Therefore, even when the drain flows through the drain introduction pipe 25, the drain flows along a portion (a portion located on the left side in FIG. 5) that is unevenly distributed on one side of the inner peripheral surface of the drain introduction pipe 25. The portion through which this drain flows is closest to the upstream end of the inner peripheral surface of the drain introduction tube 25 (the portion that is also the base end side in the extending direction and located at the left end in FIG. 5). It is a part located at a position and a part located in the vicinity thereof.

  Then, the drain that has flowed through the drain introduction pipe 25 and reached the lower end of the drain introduction pipe 25 flows into the inside of the base end side portion 32 of the drain guide portion 30 from above as it is.

  Here, the inner peripheral surface of the drain introduction pipe 25 and the inner peripheral surface of the proximal end side portion 32 form the same plane. For this reason, the drain that has flowed on the inner peripheral surface of the drain introduction pipe 25 flows along the inner peripheral surface of the base end side portion 32 located below the drain introducing tube 25. That is, the drain flows in a part of the inner peripheral surface of the base end side portion 32 and is located below the portion where the drain flows in the drain introduction pipe 25.

  That is, when the drain flows inside the base end side portion 32, the drain also travels along a portion (a portion located on the left side in FIG. 5) that is unevenly distributed on one side of the inner peripheral surface of the base end side portion 32. It will flow. The portion through which this drain flows is closest to the upstream end (the portion that is also the base end side in the extending direction and located at the left end in FIG. 5) of the lateral fall tube portion 14a in the inner peripheral surface of the base end side portion 32. The portion located at the position where the image is located and the portion located near the portion.

Then, the drain that has flowed down the inner peripheral surface of the base end side portion 32 reaches the lower end of the base end side portion 32.
Here, the inner peripheral surface of the proximal end side portion 32 of the drain guiding portion 30 and a part of the distal end side portion 33 of the drain guiding portion 30 form the same plane. That is, the distal end side portion 33 of the drain guiding portion 30 has a surface that is continuous with the inner peripheral surface of the base end side portion 32 that continues in an annular shape, and the lower end of the drain introduction tube 25 together with the inner peripheral surface of the base end side portion 32. The surface (continuous surface) which becomes the flow path of the drain extended to the stored water surface from is formed.
More specifically, a portion that is located below the portion of the proximal end portion 32 where drain has flowed and is unevenly distributed on one side of the inner peripheral surface of the distal end portion 33 that is substantially cylindrical (on the left side of FIG. 5). A surface extending in the vertical direction is formed continuously with the inner peripheral surface of the base end side portion 32. In other words, a portion of the inner peripheral surface of the distal end side portion 33 that is closest to the upstream end (the portion that is also the proximal end side in the extending direction and is located at the left end in FIG. 5) of the lateral fall tube portion 14a; A surface extending in the longitudinal direction is formed in a portion located in the vicinity thereof, continuously with the inner peripheral surface of the proximal end portion 32.

For this reason, the drain that has reached the lower end of the proximal end side portion 32 flows along a part of the distal end side portion 33 as it is. That is, it flows along a surface extending in the vertical direction that is a part of the distal end side portion 33 and is located below the portion of the proximal end side portion 32 where the drain has flowed.
Then, the drain that has flowed through a part of the distal end side portion 33 reaches the liquid level of the liquid stored in the first storage tank 20.

As described above, in the neutralization device 15 of the present embodiment, the drain guide portion 30 is provided in the lower portion of the drain introduction pipe 25. Further, in the drain guide portion 30, a surface formed by the inner peripheral surface of the proximal end side portion 32 and a part of the distal end side portion 33 and extending from the lower end of the drain introduction pipe 25 to below the liquid level of the first storage tank 20. (Continuous surface) is provided. The drain flows along this surface (continuous surface) to the liquid level of the liquid stored in the first storage tank 20 so that the drain does not drip from the vicinity of the top surface of the first storage tank 20 to the liquid level. ing.
That is, by preventing the drain from dropping from the high position to the liquid surface, the generation of bubbles on the liquid surface of the liquid stored in the first storage tank 20 is prevented.

  Further, in the neutralization device 15 of the present embodiment, the drain guiding portion 30 gradually decreases in diameter from the proximal end portion 32 side toward the distal end portion 33. In other words, since the drain guiding part 30 becomes narrower as it goes downward, it becomes narrower as it goes toward the liquid level of the liquid stored in the first storage tank 20. Thus, when it is set as the structure which becomes narrow as it goes to the liquid level of the liquid stored in the 1st storage tank 20, even when a soot and dust flow into the 1st storage tank 20 with the drain, the 1st storage tank It is possible to make it difficult for soot and dust to spread over the entire liquid stored in 20.

  That is, when soot and dust etc. reach the liquid level of the liquid stored in the first storage tank 20 together with the drain flowing through the drain guiding part 30, the soot and dust etc. try to diffuse radially outward. However, the portion of the liquid level stored in the first storage tank 20 that is in contact with the drain that has flowed in is surrounded by the distal end portion 33. That is, the tip side portion 33 located around the portion where the drained drain comes into contact acts as a wall surface for preventing diffusion of soot and dust. For this reason, it becomes possible to make it difficult to spread over a wide range from the part where the soot and dust enter the first storage tank 20, and the bubbles formed by the drain mixed with soot and dust are the first storage tank 20. Can be prevented from occurring over a wide range.

Furthermore, since the drain guiding portion 30 gradually decreases in diameter from the proximal end portion 32 side toward the distal end portion 33, the lower end of the drain introduction pipe 25 is below the liquid level of the first storage tank 20. A continuous surface extending up to is an inclined surface. That is, the continuous surface for flowing the drain formed in the drain guiding portion 30 is an inclined surface in which the inner peripheral surface extends from the radially outer side to the radially inner side as the height of the drain guiding portion 30 decreases. This makes it possible to flow the drain more reliably along the continuous surface.
Here, let us consider a case where the drain guide portion has a cylindrical shape extending along the vertical direction. At this time, if the neutralizing device is attached in a slightly inclined state due to a failure of the installation work of the installation operator, the drain guiding portion is also inclined. At this time, if the continuous surface through which the drain flows is positioned on the upper side, the drain may drip from the continuous surface. That is, if the continuous surface through which the drain flows extends toward the lower side as it goes downward, it may be difficult to flow the drain along the continuous surface.
On the other hand, when the drain guide portion 30 has a gradually decreasing diameter toward the lower side, an inclined surface extending from the radially outer side to the radially inner side as the height of the continuous surface for flowing the drain decreases; It has become. Therefore, even if the neutralizing device 15 is attached in a slightly inclined state, the continuous surface for flowing the drain is only in a state extending along the vertical direction, and the continuous surface through which the drain flows is downward. It does not become the state extended toward the radial direction outer side as it goes. For this reason, the drain does not drip from the continuous surface, and the drain can be reliably transmitted to the continuous surface.

  Here, a vent hole 35 and a slit groove 36 are formed on the side surface of the drain guide portion 30, and the air in the first storage tank 20 and the drain introduced from the drain introduction pipe 25 can be replaced. it can. As a result, leakage of drain from the neutralizing device 15 can be more reliably prevented.

More specifically, if a drain guide portion that does not have the vent hole 35 and the slit groove 36 is adopted, the lower end of the drain guide portion is blocked by the accumulated drain as shown in FIG. As a result, the air located above the liquid level of the drain stored in the first storage tank 20 cannot be discharged to the outside.
In this state, when drain flows from the drain introduction pipe 25, as shown in FIG. 6 (b), the air in the upper part of the first storage tank 20 is not discharged, and the drain is discharged only inside the drain guiding part. The liquid level becomes high. At this time, the liquid level of the first storage tank 20 does not increase in the portion excluding the inside of the drain guide part, and the electrode 28 as the liquid level detection means increases the liquid level of the first storage tank 20. It cannot be detected. Therefore, the drain may overflow from the first storage tank 20 via the drain introduction pipe 25 or the like without the liquid level detection means detecting an increase in the liquid level of the first storage tank 20.

On the other hand, in the neutralization apparatus 15 of this embodiment, the drain guide part 30 which has the vent hole 35 and the slit groove 36 is employ | adopted. As shown in FIG. 7A, the upper portions of the vent hole 35 and the slit groove 36 are located above the reference liquid level (the liquid level indicated by Lα in FIG. 7A). Therefore, even when the lower end of the drain guiding portion 30 is positioned below the drain liquid level stored in the first storage tank 20, the air positioned above the drain liquid level is allowed to flow into the vent hole 35 or the slit groove. It is in a state that can be discharged from 36 to the outside.
Accordingly, when drain is introduced from the drain introduction pipe 25 in this state, the air located above the drain liquid surface is replaced with the drained drain. That is, the air located at the upper part of the drain liquid surface is discharged to the outside from the vent hole 35 and the slit groove 36 and is stored in the entire first storage tank 20 as shown in FIG. The drain liquid level rises. Therefore, an increase in the liquid level in the first storage tank 20 can be reliably detected by the liquid level detection means before the drain overflows from the first storage tank 20.

In the present embodiment, as described above, the drain that has flowed under the side-inclined pipe portion 14a is a part of the inner peripheral surface of the drain introduction pipe 25, a part of the inner peripheral surface of the proximal end side portion 32, and the distal end. The side portion 33 has a structure that flows along each of the longitudinally extending surfaces. In the drain introduction pipe 25, the base end side portion 32, and the tip end side portion 33, all the portions where the drain flows are unevenly distributed on one side, and the horizontal positions are substantially the same. In other words, a flow path for the drain to flow is formed in a part of the side of the drain introduction pipe 25 and the drain guide portion 30 that is biased.
A vent hole 35 is formed in a portion of the inner peripheral surface of the base end side portion 32 that is different in position in the horizontal direction from the portion that forms the flow path through which the drain flows. More specifically, a vent hole 35 is formed in a portion that is spaced apart from a portion that forms a flow path through which the drain flows.
In the distal end portion 33, a slit groove 36 is formed in a portion of the inner peripheral surface of the distal end side portion 33 that has a different horizontal position from the portion that forms the flow path through which the drain flows. More specifically, the slit groove 36 is formed in a portion that faces and separates from the portion that forms the flow path through which the drain flows.

As described above, the vent hole 35 and the slit groove 36 are formed in a portion where the position in the horizontal direction is different from a portion of the drain guide portion 30 where the drain flows, that is, a portion where the drain does not flow. In other words, the vent hole 35 and the slit groove 36 are provided so as to avoid the portion where the drain flows. According to such a configuration, the vent hole 35 and the slit groove 36 do not hinder the flow of the drain, so that the drain can smoothly flow into the first storage tank 20.
In addition, the part in which the ventilation hole 35 and the slit groove | channel 36 are formed is a position which opposes the part which forms the flow path through which a drain flows. That is, in the circumferential direction of the drain guiding portion 30, the vent hole 35 and the slit groove 36 are formed at a position farthest from a portion that forms a flow path through which the drain flows. If it does in this way, it can be set as the structure which the vent hole 35 and the slit groove | channel 36 do not inhibit the flow of drain more reliably.

  In the above-described embodiment, the example in which the slit groove 36 is provided in the distal end side portion 33 of the drain guide portion 30 is shown, but the present invention is not limited to this. For example, a plurality of through holes may be formed in place of the slit groove 36. That is, a through hole may be formed at a position apart in the vertical direction on the side surface of the drain guide part to form the external open part. In other words, it is possible to form a through-hole row parallel in the vertical direction as the external open portion. A part of the side of the drain guiding portion may be open to the outside.

  In the above-described embodiment, the distal end side portion 33 of the drain guide portion 30 is formed in a C-shaped cross section and extends in the vertical direction, but the present invention is not limited to this. For example, the length in the circumferential direction of the tip side portion of the drain guide portion 30 may be made shorter to form a tip side portion of a substantially vertically split cylindrical shape. That is, the tip side portion may have a shape extending only a half circumference in the circumferential direction.

1 Combustion device 5 Secondary heat exchanger (heat exchanger)
6 Drain discharge system 15 Neutralizer 20 First storage tank (storage part)
30 Drain guide (Drip prevention means)
35 Ventilation hole (external opening)
36 Slit groove (external opening)

Claims (7)

Neutralization provided in a combustion apparatus having a burner and a heat exchanger for recovering the latent heat of combustion gas generated by the combustion operation of the burner, and neutralizing the drain generated in the heat exchanger and discharging it to the outside A device,
A storage part for storing drain is formed inside, and the storage part is used in a state where a predetermined amount of liquid is stored,
A drain introduction pipe having a drain introduction port for introducing drain into the storage portion is provided on the upper side, and is formed integrally with the drain introduction pipe below the drain introduction pipe, from the drain introduction port Drip prevention means for preventing the drain from dripping directly onto the liquid level of the liquid stored in the storage unit ,
The dripping prevention means includes an outer cylindrical base end portion and a lower distal end portion that are integrally formed with a part of the side open to the outside. Has an open part,
The external open part is located above the liquid level of the predetermined amount of liquid stored at least in the upper part of the storage part,
An inner peripheral surface of the base end side portion and a part of the tip end side portion form a continuous surface extending over the base end side portion and the tip end side portion, and the lower end portion of the continuous surface serves as the storage portion. A neutralizing apparatus that is used in contact with a liquid level of a stored liquid, and that drainage flows down to the storage part through the continuous surface. The external open portion is formed in the base end side portion, and is a vent hole that communicates the inside and outside of the base end side portion,
The neutralization apparatus according to claim 1, wherein the neutralization device is used in a state where the air hole is positioned above a water surface of the liquid stored in the storage unit.   2. The drain flows along a part of the side of the tip side portion, and the external open portion is provided so as to avoid a portion where the drain of the tip side portion flows. Or the neutralization apparatus of 2.   The external open portion is formed at the tip side portion, and is a slit groove extending along the vertical direction and / or a plurality of through holes formed at positions separated in the vertical direction. The neutralization apparatus according to any one of claims 1 to 3.   The neutralizing apparatus according to any one of claims 1 to 4, wherein the tip side portion is substantially cylindrical and has a diameter that decreases toward the tip side.   The neutralization apparatus according to any one of claims 1 to 5, wherein the storage portion into which drain flows from the drain introduction port through the dripping prevention means is not filled with a neutralizing agent.   A combustion apparatus comprising the neutralization apparatus according to any one of claims 1 to 6.

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