JP2013071090A - Neutralization device and combustion apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a neutralization device which, even when a wide space cannot be secured around the location of the neutralization device, piping attachment work can be carried out easily without changing the substantial capacity of the neutralizing device, and to provide a combustion apparatus equipped with such a neutralization device.SOLUTION: In an upper part of the neutralization device 15, a drain water introduction unit 61 is formed, to which a piping leading to an external member can be attached. The drain water introduction unit 61 has a tubular insertion portion 73 and a slot 74. The base end of the insertion portion 73 is located closer to the interior of the body of the neutralizing device than an opening surface of the slot 74.

Description

  The present invention relates to a neutralizer for neutralizing drain generated when recovering latent heat of combustion gas. Moreover, it is related with the combustion apparatus provided with the neutralization apparatus.

  In recent years, in order to improve the heat exchange efficiency of heat generated when a burner is burned, 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. .

  A gas such as methane or propane is used as a main component as a fuel for burning the burner with such a combustion apparatus. Such gas contains hydrogen, and when burned, the combustion gas contains water vapor. For this reason, when the latent heat of the water vapor is recovered by the secondary heat exchanger, the water vapor in the combustion gas is liquefied and drainage is generated. In addition, since nitrogen and oxygen in the air react with each other by combustion to generate nitrogen oxides, the drain exposed to the combustion gas becomes acidic by the nitrogen oxides. That is, such a latent heat recovery type combustion apparatus generates acidic drainage due to its structure.

  Since this acidic drain is nitric acid that exhibits a strong acid, there is a concern that if it is drained to the outside without being treated, it will adversely affect the environment and the like. For this reason, some latent heat recovery type combustion apparatuses are provided with a drain discharge system for leading 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.

  For example, Patent Document 1 discloses a neutralizing device that neutralizes such drain, and a combustion device that includes such a neutralizing device. The combustion apparatus disclosed in Patent Document 1 is a so-called reverse combustion system combustion apparatus, and includes a combustion section including a burner, a primary heat exchanger, and a secondary heat exchanger in order from above. The combustion case and the exhaust collecting portion are continuously provided. And the lower part of the exhaust collecting part and the upper part of the neutralizing device are connected by piping, and the drain flows from the exhaust collecting part to the neutralizing device.

JP 2009-34588 A

  By the way, in recent years, a combustion apparatus that can be installed in a narrow place has been desired from the market, and a combustion apparatus reduced in size has been developed to meet such a demand. In such a combustion apparatus, since the internal space of the combustion apparatus is substantially narrowed, a large space cannot be secured around the installation position of the neutralization apparatus. Then, when attaching a neutralization apparatus inside a combustion apparatus, the space for an operator to work cannot be secured.

  Specifically, when installing the neutralizer inside the combustion device, the operator moves the neutralizer into the combustion device with one end of the pipe connected in advance to the upper part of the neutralizer. And install it at the planned installation position. In this state, the other end of the pipe connected to the neutralizer is connected to a lower portion of the upstream member in the drain flow direction, such as an exhaust collecting portion. Therefore, if a sufficient space cannot be ensured between the neutralization device and the upstream member in the drain flow direction, it is very difficult to attach such a neutralization device.

  As a method of installing the neutralization device in such a downsized combustion device, the neutralization device main body can be downsized. However, if the neutralization device body is downsized, it is inconvenient because it is not possible to secure a sufficient volume for storing the neutralizing agent, and it is necessary to supplement the neutralizing agent many times in a short period of time. There's a problem. That is, there is a problem in that the neutralizing agent is quickly lost because only a small amount of the neutralizing agent can be packed in the neutralizer.

  Furthermore, if the neutralizing device main body is downsized, there is a problem that the drain cannot stay in the neutralizing device for a long time. More specifically, the neutralizer has a structure in which drain continues to flow into the interior, and when the drain inflow exceeds the storage amount of the neutralizer, the drain is discharged to the outside of the neutralizer. At this time, if the volume of the neutralizing device is small, the storage amount of the neutralizing device is also small. Therefore, the time from when the drain is introduced until it is discharged is shortened, and the drain cannot stay in the neutralizer for a long time. Here, the drain is neutralized by staying in the neutralizer filled with the neutralizer for a predetermined time or more. Therefore, if the drain cannot be kept in the neutralizing device for a long time, there arises a problem that the drain cannot be sufficiently neutralized.

  Moreover, the method of changing the connection direction of piping with respect to the neutralization apparatus and the extension direction of piping is considered. That is, it is a method of changing the installation surface of the pipe attachment port of the neutralizer and forming the pipe attachment port at a position where the pipe attachment work can be easily performed. However, as described above, since the place where the neutralizing device is installed is narrow, there is a limitation in changing the installation surface of the pipe attachment port, and there is a problem that the change is difficult. Also, according to such a method, the pipe length must be unnecessarily increased by bending or twisting the pipe. However, if the pipe is bent, twisted, etc., the flow path will be complicated, so a drain pool will be formed in the pipe, or if dust etc. flows in with the drain. In addition, there is a problem that it is undesirable because it may cause clogging of the piping.

  Therefore, in view of the problems of the prior art described above, the present invention is not limited to the volume of the neutralizing device body, the connecting direction and the extending direction of the piping, and the piping connection work is performed even in a downsized combustion device. It is an object of the present invention to provide a neutralizing device capable of easily carrying out the above, and a combustion device equipped with such a neutralizing device.

  The invention according to claim 1 for solving the above-mentioned problem is a combustion apparatus having a combustor and a heat exchanger that mainly recovers the latent heat of the combustion gas, and is generated in the heat exchanger from within the combustion apparatus. A neutralization device for neutralizing and discharging the drain to be drained, wherein a drain introduction portion capable of attaching a pipe provided between the outer member and the upper part of the main body is provided, The drain introduction portion has a tubular insertion portion that can be inserted into the inner periphery of the end portion of the pipe, and a groove portion that surrounds the insertion portion, and the insertion portion communicates between the outside and the inside of the main body, In the neutralizing device, the proximal end portion of the insertion portion is located on the inner side of the main body from the opening surface of the groove portion.

  The neutralization device of the present invention includes a drain introduction portion having a tubular insertion portion and a groove portion surrounding the insertion portion. Moreover, the base end part of the insertion part is located in the said main body inside side from the opening surface of the said groove part. Thus, the insertion portion can be disposed at a position close to the inside of the main body. Also, when the pipe is attached to the insertion part, the part where the insertion part is inserted into the pipe and where the insertion part overlaps inside and outside (hereinafter also referred to as the connecting part) is positioned inside the main body. Can do. Therefore, in the neutralization device of the present invention, the distal end portion of the insertion portion can be positioned on the inside of the main body without shortening the length of the connecting portion.

  Here, when the insertion portion is inserted into the piping, if the length of the connecting portion is long, the connected piping is difficult to come off. Specifically, when the other tubular member is inserted into the inner hole of one tubular member and the two tubular members are connected to each other, the two tubular members overlap. The part (joining part) which existed is formed. At this time, when one tubular member is moved in a direction to be removed from the other tubular member, a frictional force acts on the connecting portion so as to prevent the movement. For this reason, if the length of the connecting portion is long, when one tubular member is moved in a direction to be removed from the other tubular member, a frictional force acts in a direction that prevents the movement while moving a longer distance. . This makes it difficult for the connected piping to come off. That is, in the neutralization apparatus of the present invention, the length of the connecting portion is relatively long, so that the pipe can be firmly attached.

  Further, when the proximal end portion of the insertion portion is positioned on the inside of the main body, the space formed between the distal end of the insertion portion and an external member can be widened. Then, when installing piping provided between an insertion part and an external member, the space for performing the attachment work of piping becomes wide. This makes it possible to secure a sufficient space in which the pipe can be attached without reducing the size of the neutralizing device, so that the pipe can be easily attached.

  In the neutralizing device of the present invention, it is desirable that the insertion portion extends in the vertical direction, and the opening surface of the groove portion is configured to form the same plane as the upper surface of the main body (Claim 2).

  The invention described in claim 3 is characterized in that a fixing tool mounting space is formed in an upper portion of the main body, and the fixing tool mounting space is continuous with an outer peripheral portion of the groove. The neutralization apparatus according to 1 or 2.

  In the neutralizing device of the present invention, since the groove portion and the fixing device mounting space are continuous, the fixing device is attached to the vicinity of the end portion of the pipe even when the vicinity of the end portion of the piping is fitted inside the groove portion. Can be easily implemented. This makes it possible to attach the pipe more firmly.

  According to a fourth aspect of the present invention, a protrusion that protrudes inward from the outside is formed on the inner peripheral surface of the main body at a portion where the groove is formed. The neutralization apparatus according to any one of the above.

In the neutralizing device of the present invention, an inward projection is formed on the inner peripheral surface of the main body and in the vicinity of the insertion portion serving as a drain inlet. By this, the flow of the water droplet of the drain adhering to the main body inside upper surface can be suppressed.
More specifically, when drain flows into the neutralization device, water droplets of the drain may adhere to the upper surface inside the main body. And the water droplet of this drain may flow along the upper surface inside a main body. By the way, an electrode may be attached to the neutralization device in order to detect the water level of the drain stored inside. Therefore, in such a neutralization apparatus, the drained water droplets may come into contact with a member such as an electrode, which may cause a problem such as a short circuit of the electrode.
Therefore, in the neutralization apparatus of the present invention, in order to prevent the occurrence of such a problem, a projection protruding inward is formed in the vicinity of the insertion portion serving as the drain inlet. As a result, a step is formed between the outer edge portion of the protrusion and the portion located outside the protrusion. In this case, in order for the water droplets of the drain adhering to the protruding end face of the protrusion to move outward of the protrusion, it is necessary to flow upward along the step. However, since gravity acts on the water droplets of the drain, it does not flow upward.
That is, the neutralization device of the present invention can prevent the flow of drain water droplets outward from the protrusions by the step formed by the protrusions, and therefore can prevent the water droplets from entering the predetermined area. As a result, it is possible to prevent problems caused by the drain water droplets coming into contact with other members.

  The invention according to claim 5 is a burner that burns fuel, a primary heat exchanger that mainly recovers sensible heat of the combustion gas generated by the operation of the burner, and recovers mainly latent heat of the combustion gas. It is a combustion apparatus characterized by having a drain heat drain system provided with a secondary heat exchanger and the neutralization device according to any one of claims 1 to 4.

  The combustion apparatus of the present invention includes the neutralization apparatus according to any one of the first to fourth aspects, and the neutralization apparatus can maintain its size even if the combustion apparatus is downsized. As a result, a sufficient amount of neutralizing agent can be packed inside the neutralizing device, so that it is not necessary to replenish the neutralizing agent many times in a short time, and efficient operation is possible. . Furthermore, since the neutralized drain can be discharged after being sufficiently stored, the drain can be reliably neutralized. That is, in the combustion apparatus of the present invention, it is possible to simultaneously realize downsizing and efficient drain discharge operation. Moreover, in the combustion apparatus of this invention, even if it is a case where there exists only a narrow space around the installation position of a neutralization apparatus, the attachment work of piping can be implemented easily. Therefore, it is possible to reduce the burden on the contractor during installation work and maintenance.

In the neutralizing device of the present invention, since the insertion portion is arranged at a position close to the inside of the main body, the space formed between the tip of the insertion portion and an external member can be widened. This increases the space for pipe installation work, so pipe installation work can be easily performed without changing the drain tank body volume, pipe length, pipe installation direction, etc. There is an effect that can be done.
In addition, the combustion apparatus of the present invention equipped with such a neutralization device does not need to unnecessarily reduce the size of the neutralization device even if the housing is downsized, so that the neutralized drain is sufficiently stored. It can be discharged later. Therefore, there is an effect that the drain discharge operation can be efficiently performed even if the housing is downsized.

It is a block diagram which shows the combustion apparatus which concerns on embodiment of this invention. It is a perspective view which shows the neutralization apparatus of FIG. It is a perspective view which shows the main-body part of the neutralization apparatus of FIG. It is an A direction arrow directional view which shows the main-body part of the neutralization apparatus of FIG. It is a perspective view which shows the cover part of the neutralization apparatus of FIG. It is AA sectional drawing which shows the cover part of the neutralization apparatus of FIG. It is the perspective view which looked at the cover part of the neutralization apparatus of FIG. 5 from the back surface side. It is a perspective view which shows the state which attached the drain hose to the neutralization apparatus of FIG. It is sectional drawing which shows a drain introduction part and a drain hose in the state which attached the drain hose with respect to the neutralization apparatus. It is explanatory drawing which shows the procedure when attaching the drain hose attached to the neutralization apparatus to another member, and attaches in order of (a)-(c). It is sectional drawing which shows a drain introduction part and a drain hose in the state which attached the drain hose with respect to the neutralization apparatus, Comprising: The state which the water droplet of the drain adhered to the cover part of the neutralization apparatus is shown.

  Hereinafter, although the combustion apparatus 1 concerning embodiment of this invention and the neutralization apparatus 15 are demonstrated in detail, this invention is not limited to these examples. In the following description, the vertical and horizontal positional relationship will be described based on the normal installation state unless otherwise specified.

  As shown in FIG. 1, the combustion apparatus 1 includes a combustion unit 3 (combustor), a primary heat exchanger 4 that mainly recovers sensible heat, and a secondary heat exchange that mainly recovers latent heat. It is a so-called latent heat recovery type combustion apparatus provided with a vessel 5 (heat exchanger).

  The combustion part 3 can form a flame downward by a burner (not shown). That is, the combustion unit 3 has a so-called reverse combustion burner.

Further, in the combustion apparatus 1, the combustion unit 3 is positioned from the upper end of the housing 2, and the primary heat exchanger 4 is positioned below the combustion unit 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 exhaust part 9 protrudes upward from the top surface of the housing 2.
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 discharge | releases outside from the exhaust port formed above the exhaust part 9. FIG. 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 the nitrogen oxides generated by the 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 80 (see FIG. 10, not shown in FIG. 1) formed at the bottom of the storage case 7 and a drain hose 14 (upstream piping) in order from the upstream side in the drain flow direction. Member), the neutralizing device 15, and the downstream piping member 16.

  The drain discharge portion 80 is a piping member that communicates the inside and outside of the storage case 7 and protrudes substantially vertically downward from the bottom of the storage case 7. The opening on the leading end side in the protruding direction of the drain discharge portion 80 serves as a drain discharge port for discharging drain from the inside of the storage case 7 to the outside.

  The drain hose 14 is formed of an appropriate resin such as synthetic rubber or vinyl chloride, and is a flexible piping member.

  In the drain discharge system 6, the drain discharged from the drain discharge unit 80 flows into the neutralization device 15 through the drain hose 14.

  At this time, the internal space of the neutralizing device 15 is divided into a plurality of spaces by the partition walls, and at least one space is filled with the neutralizing agent. And the drain which flowed in flows sequentially in this some space. At this time, in each space, the drain that has flowed into the space once stays and flows out of the space when the water level exceeds a certain level. That is, the drain that has flowed into the neutralizing device 15 flows out after remaining in the respective spaces 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 space.

  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 constituent member of the present invention will be described in detail.

  As shown in FIG. 1, the neutralization device 15 is located near the lower end of the combustion device 1, a position slightly lower than the storage case 7, and is disposed at a position surrounded by piping, a pump, and the like. .

  And the neutralization apparatus 15 is a box-shaped member formed from the main-body part 23 (main body) and the cover part 24, and can store a liquid (drain) inside as FIG. 2 shows. .

  As shown in FIG. 3, the main body portion 23 is a container having an open top, and is provided so as to protrude from the neutralization space forming portion 30 having a substantially rectangular parallelepiped box shape to the lateral side from the neutralization space forming portion 30. The water replenishment space forming portion 31 is formed. The water replenishment space forming portion 31 is a small rectangular parallelepiped box-shaped portion as compared with the neutralization space forming portion 30, and is formed integrally with one side surface of the neutralization space forming portion 30. Specifically, it is a longitudinal end portion of one side surface of the neutralization space forming portion 30 and is provided so as to protrude outward from the upper end portion.

  At this time, the internal space of the neutralization space forming portion 30 and the internal space of the water replenishment space forming portion 31 are continuous via the water replenishment space partition wall 32 bent in an arc shape. Specifically, the supplementary water partition wall 32 is provided with a plurality of slits extending in the vertical direction, and is arranged in parallel in the extending direction of the supplementary water partition wall 32. And the internal space of the neutralization space formation part 30 and the internal space of the water formation part 31 for water replenishment are continuing through this slit.

  The neutralization space forming portion 30 is formed by a bottom surface portion 35 and side wall portions 36, 37, 38, 39 that protrude substantially vertically upward from the edge portion of the bottom surface portion 35. Here, the bottom surface part 35 is formed of a low position part 35a occupying most of the bottom surface part 35 and a high position part 35b provided at a position higher than the low position part 35a. At this time, the low position portion 35a and the high position portion 35b are continuous through a step, and the drain discharge portion 42 is provided in the high position portion 35b.

  The drain discharge part 42 is a tubular part that protrudes substantially vertically downward from a high position part 35 b that is a part of the bottom part 35. And the drain discharge part 42 can be inserted in the inner hole of the downstream piping member 16 (refer FIG. 1).

Next, the inside of the main body 23 will be described.
As shown in FIG. 4, the interior of the main body 23 is partitioned by a first partition wall 45, a second partition wall 46, a third partition wall 47, and a fourth partition wall 48. Thus, the internal space of the main body 23 is partitioned into a first space 51, a second space 52, a third space 53, a fourth space 54, and a fifth space 55 from the upstream side in the drain flow direction.

  Here, the first drainage portion 58 is provided on the bottom surface of the second space 52, and the second drainage portion 59 is provided at a position straddling the bottom surface of the fourth space 54 and the bottom surface of the fifth space 55. Is provided. At this time, the fourth partition wall 48 extends so as to pass over the second drainage part 59, in other words, the second drainage part 59 is provided to be embedded in the lower end of the fourth partition wall 48. ing.

  The 1st drainage part 58 and the 2nd drainage part 59 are the drains which are not normally used, and are the liquids (neutralization water) which are stored inside when the neutralization apparatus 15 is not used for a long period of time. It is formed to discharge to the outside. Therefore, the drainage port continuous with the first drainage unit 58 and the second drainage unit 59 is normally liquid-tightly sealed with a drain plug (not shown).

  The fifth space 55 is provided with drainage communication holes 60. The drainage communication hole 60 penetrates the bottom surface of the fifth space 55, and is a communication hole communicating with the inner hole of the drain discharge portion 42 (see FIG. 3) of the main body portion 23 described above.

Next, the lid 24 will be described.
As shown in FIG. 5, the lid portion 24 is integrally joined so as to surround the edge portion of the lid main body portion 24 a and the lid main body portion 24 a having a substantially L-shaped plate shape in plan view. It is formed by the protruding lid side wall part 24b.

In addition, the lid 24 is supplied with hot water to which a drain introduction pipe 61 (see FIG. 1) to which the drain hose 14 (see FIG. 1) can be attached and a supplementary water pipe 20 (see FIG. 1) provided between the supplementary water solenoid valve 19 is attached. A portion 62 is formed. The lid 24 is formed with an electrode arrangement region 63 in which electrodes 68, 69, 70, and 71, which are part of a water level detection mechanism (not shown), are integrally attached.
That is, the neutralization device 15 of the present embodiment is configured to detect the water level of the drain stored in the main body portion 23. In addition, hot water is allowed to flow into the main body 23 from the outside.

  As shown in FIG. 5, the drain introducing portion 61 includes a cylindrical insertion portion 73 extending in the vertical direction, a groove portion 74 positioned so as to surround the insertion portion 73, and a fixed member movement formed outside the groove portion 74. It is formed by a groove 75 (fixing attachment space).

  As shown in FIG. 5, the insertion portion 73 has an upper end located above the top surface of the lid body portion 24a and a lower end (base end) located below the top surface of the lid body portion 24a. . Specifically, as shown in FIG. 6, in the portion where the insertion portion 73 is provided, the lid main body portion 24 a is recessed downward (a groove portion 74 is formed), and the insertion portion 73 is It protrudes upward from the lowest part among the recessed parts. And the through-hole 73a formed in the center of the insertion part 73 has penetrated the cover main-body part 24a.

  As shown in FIGS. 5 and 6, the groove portion 74 is an annular groove formed so that the lid main body portion 24 a is depressed downward and surrounds the insertion portion 73. At this time, the inner peripheral surface of the groove portion 74 is the same surface as the outer peripheral surface of the insertion portion 73 described above, and the outer peripheral surface of the groove portion 74 is the top surface of the lid main body portion 24a, the bottom surface of the fixing member moving groove 75, Each part is continuous with the side wall surface of the fixed member moving groove 75. In addition, the part where the outer peripheral surface of the groove part 74 and each part are continuing is rounded, and these are continuing smoothly.

  Here, paying attention to the back side of the lid main body 24a, as shown in FIG. 6, the portion where the groove 74 is formed is convex substantially vertically downward. At this time, the part located in the back side of the bottom face of the groove part 74 is the projecting end face located at the lowest position in the convex part. And this projecting end surface is continuous with the inner peripheral surface of the insertion portion 73 on the one hand, and on the other hand, the back surface of the portion of the back surface of the lid main body portion 24a where the groove portion 74 is not formed, or the fixed member moving groove. It is continuous with the back surface of the portion where 75 is formed. That is, as shown in FIG. 7, on the back surface side of the lid main body portion 24a, the portion where the groove 74 is formed is a substantially torus-shaped ring that protrudes substantially vertically downward from the back surface of the lid main body portion 24a. A protrusion 76 is formed.

  As shown in FIG. 5, the fixed member moving groove 75 is a groove that is continuous with a part of the outer peripheral surface of the annular groove 74 and is bent and extended in an arc shape so as to form a substantially fan-shaped space. As shown in FIG. 6, the bottom surface of the fixing member moving groove 75 is located above the bottom surface of the groove portion 74 and below the top surface of the lid main body portion 24a. At this time, the bottom surface of the groove portion 74 and the inner edge portion (portion on the insertion portion 73 side) of the bottom surface of the fixed member moving groove 75 are continuous through a step. Further, the outer edge portion of the bottom surface of the fixing member moving groove 75 and the top surface of the lid main body portion 24a are also continuous through a step. In addition, each of these continuous parts is rounded and is continuously continuous.

  In addition, in the bottom surface of the fixed member moving groove 75, the portion other than the inner edge portion is continuous with the side wall surface that stands substantially vertically above the bottom surface. Therefore, the side wall surface of the fixing member moving groove 75 has three side walls, two side wall surfaces extending outward from the inner edge portion side of the bottom surface, and three side wall surfaces extending in an arc shape so as to connect the two side wall surfaces. It has a side wall surface. Here, the two side wall surfaces extending outward from the inner edge portion side of the bottom surface are continuous with the upper portion of the outer peripheral surface of the groove portion 74 at the inner end portion in the extending direction. Further, all the three side wall surfaces are continuous with the top surface of the lid main body portion 24a at the upper portion. In addition, each of these continuous parts is rounded and is continuously continuous.

  Next, a procedure for attaching the neutralization device 15 of the present embodiment to the combustion device 1 will be described.

  When the neutralization device 15 is attached to the combustion device 1, as shown in FIG. 8, the drain hose 14 is attached to the drain introduction portion 61 (see FIG. 2) of the neutralization device 15. Specifically, the insertion portion 73 is inserted through the inner hole of the drain hose 14. Then, by bringing the drain hose 14 closer to the neutralization device 15, the drain hose 14 is pushed into the neutralization device 15, and a portion from one end of the drain hose 14 is fitted into the groove 74. .

  Then, the drain hose 14 is fastened from the outside by the fixing tool 78 and fixed.

  Here, in this embodiment, the fixing tool 78 is a clip formed by two knob portions 78a and a hook portion 78b obtained by processing a wire-like member into a spiral shape. Then, by moving the two knob portions 78a in the circumferential direction of the latching portion 78b, the diameter of the latching portion 78b is increased or decreased. Specifically, when the two knob portions 78a are relatively close to each other, the latching portion 78b expands in the radial direction and becomes loose. When the two knob portions 78a are relatively moved away from each other, they are contracted in the radial direction and tightened.

  That is, the annular knob part 78a of the fixing tool 78 is relatively brought close to the upper side of the drain hose 14, and the drain hose 14 is inserted into the hooking part 78b. And the fixing tool 78 is moved to the downward side of the drain hose 14 as it is. Further, the drain hose 14 is tightened from the outside by the fixing tool 78 by relatively moving the knob portion 78 a of the fixing tool 78 in the space formed by the fixing member moving groove 75.

  Then, the neutralizing device 15 with the drain hose 14 attached in this way is moved into the housing 2 of the combustion device 1, and the drain hose 14 is attached to the storage case 7, so that the neutralizing device 15 is attached to the combustion device 1. Complete.

  At this time, in the drain introduction part 61 of this embodiment, as above-mentioned, the insertion part 73 protrudes from the downward side rather than the top | upper surface of the lid | cover main-body part 24a. As a result, as shown in FIG. 9, in the region above the top surface of the lid main body 24a, the length L1 of the portion where the insertion portion 73 is inserted into the drain hose 14 (hereinafter referred to as the insertion length of the top surface top). Can be shortened.

  Here, suppose a case where the cylindrical insertion portion protrudes from the top surface of the lid main body portion 24a, that is, a configuration like a conventional neutralization device. In this case, of the lower end side portion of the drain hose 14, the entire length L2 of the portion where the insertion portion is inserted (hereinafter also referred to as the entire insertion length L2) and the insertion length L1 of the top surface are the same. End up. That is, all the portions where the insertion portion is inserted into the drain hose 14 are located above the top surface.

  On the other hand, in the present embodiment, since the lower end portion of the insertion portion 73 is provided below the top surface of the lid main body portion 24a, the insertion length L1 at the top of the top surface is smaller than the total insertion length L2. Become. That is, in the lower end side portion of the drain hose 14, most of the portion where the insertion portion 73 is inserted is positioned below the top surface of the lid main body portion 24a. For this reason, the insertion length L1 at the top of the top surface can be shortened without shortening the entire insertion length L2 (while maintaining the length of the entire insertion length L2). Thus, the drain hose 14 can be firmly attached to the neutralizing device 15 and the neutralizing device 15 can be easily attached to the combustion device 1. Each of these will be described.

  First, it will be described that the drain hose 14 can be firmly attached to the neutralizing device 15 by maintaining the length of the entire insertion length L2.

  If the total insertion length L2 is shortened, the drain hose 14 is likely to come out of the insertion portion 73 when the drain hose 14 is externally fitted to the insertion portion 73. That is, when the insertion portion 73 is inserted and attached to the inner hole of the drain hose 14, the drain hose 14 tightens the insertion portion 73 from the outside, whereby a force is applied from the drain hose 14 to the insertion portion 73 radially inward. Therefore, when the drain hose 14 is moved in the direction in which the drain hose 14 comes out of the insertion portion 73 in the portion where the inner peripheral surface of the inner hole of the drain hose 14 and the outer peripheral surface of the insertion portion 73 are in contact with each other, Force (force applied to the inside in the radial direction) that hinders the movement of. Therefore, when removing the drain hose 14 by moving the drain hose 14 in the direction to be removed from the insertion portion 73, the longer the total insertion length L2, the longer the force that prevents the movement in the removal direction is longer for the drain hose 14. Join over. Therefore, the drain hose 14 is less likely to come out of the insertion portion 73 when the insertion total length L2 is longer. Since the neutralization apparatus 15 of this embodiment can lengthen the insertion full length L2, it can attach the drain hose 14 in the state which is hard to remove | deviate from the insertion part 73. FIG.

  Next, it will be described in detail with reference to FIG. 10 that the neutralization device 15 can be easily attached to the combustion device 1 by shortening the insertion length L1 at the top of the top surface.

  As described above, when attaching the neutralization device 15 to the combustion device 1, the neutralization device 15 (see FIG. 8) with the drain hose 14 attached in advance is moved into the housing 2, and then the drain hose 14 is stored in the storage case. 7 is attached.

  When the neutralizing device 15 to which the drain hose 14 is attached is moved below the storage case 7, the upper end of the drain hose 14 is in the vicinity of the drain discharge portion 80 of the storage case 7 as shown in FIG. Located in. Then, the drain hose 14 is bent from the state shown in FIG. 10A, and the upper end portion of the drain hose 14 is attached to the drain discharge portion 80 as shown in FIG.

  Here, in this embodiment, since the insertion length L1 at the top of the top surface is short, the length from the upper end of the insertion portion 73 to the lower end of the drain discharge portion 80 can be increased. As a result, the vertical length of the space formed between the insertion portion 73 and the drain discharge portion 80 is increased. That is, since a sufficiently wide space can be secured between the insertion portion 73 and the drain discharge portion 80, the operator can easily perform the connection work.

  Furthermore, since the insertion length L1 at the top of the top surface is short, the bendable portion of the drain hose 14 can be lengthened. That is, when the drain hose 14 is elastically deformed, the drain hose 14 cannot be elastically deformed at the portion where the insertion portion 73 is inserted because the insertion portion 73 inhibits elastic deformation. Therefore, the drain hose 14 can be elastically deformed only at a portion located above the insertion portion 73. In the present embodiment, since the insertion length L1 at the top of the top surface is short, the portion located above the insertion portion 73 of the drain hose 14 becomes relatively long, and the elastically deformable portion of the drain hose 14 becomes long.

Thus, if the elastically deformable portion of the drain hose 14 is lengthened, the degree of freedom of deformation of the drain hose 14 is increased when the mounting operation is performed. That is, even when the space between the storage case 7 and the neutralizing device 15 is narrow, the upper end portion of the drain hose 14 is easily moved downward to the drain discharge portion 80 by greatly deforming the drain hose 14. be able to. This facilitates the work of attaching the drain hose 14 to the drain discharge portion 80, and further facilitates the attachment of the neutralizing device 15 to the combustion device 1.
In addition, in FIG.10 (b), the figure which bent the drain hose 14 largely is shown for description. However, the drain hose 14 may be a harder member and may not be bent greatly.

  Then, from the state in which the upper end portion of the drain hose 14 is attached to the drain discharge portion 80, as shown in FIG. 10C, the elastic deformation of the drain hose 14 is returned to the original state, and the drain hose 14 is extended in the vertical direction. With this state, the attachment of the drain hose 14 to the storage case 7 is completed. Then, an appropriate portion of the neutralizing device 15 is fixed to the inner wall of the housing 2, and the downstream piping member 16 (see FIG. 1) is attached to the drain discharge portion 42 (see FIG. 2) of the neutralizing device 15, and the downstream piping By connecting the member 16 to a member outside the housing 2, the attachment of the neutralizing device 15 to the combustion device 1 is completed.

  Above, description is complete | finished about the procedure when attaching the neutralization apparatus 15 to the combustion apparatus 1. FIG.

  By the way, when the neutralization device 15 is attached to the combustion device 1 and used, after drain has flowed into the neutralization device 15, as shown in FIG. 11, water droplets of the drain adhered to the back surface of the lid body 24 a. It may be in a state. Here, as described above, in the present embodiment, an annular protrusion that protrudes substantially vertically downward from the back surface of the lid main body portion 24a around the through hole 73a of the insertion portion 73 serving as a drain inlet to the inside. 76 (see FIG. 7). As a result, it is possible to prevent the water droplets of the drain from moving outside the annular projection 76.

  More specifically, when the drain gradually flows into the neutralizing device 15, as shown in FIG. 11, due to surface tension, the water droplets of the drain, the inner peripheral surface of the through hole 73 a of the insertion portion 73, and the inner peripheral surface thereof. It may adhere to the protruding end surface of the annular projection 76 that is continuous with the surface. At this time, water droplets of the attached drain may flow toward the outside of the annular projection 76 (direction indicated by the arrow in FIG. 11).

  Here, on the back surface of the lid main body portion 24a of the present embodiment, the step Ld1 (or the step Ld2 and the step) are formed between the portion where the annular protrusion 76 is formed and the portion where the annular protrusion 76 is not formed. Ld3) is formed.

  Therefore, when the water droplets of the drain flow outward, they eventually move to the outer edge portion of the projecting end surface of the annular projection 76 and reach the level difference Ld1 (level difference Ld2). Here, in order for the water droplets of the drain to move outward from this portion beyond the step Ld1 (step Ld2), the water droplet of the drain needs to move upward along the step Ld1 (step Ld2). . However, gravity does not move on the water droplets of the drain, so it does not move upward.

  That is, in the present embodiment, on the back surface side of the lid main body portion 24a, by forming a protrusion (annular protrusion 76) protruding downward at a position surrounding the drain inlet, the drain inlet and other portions are formed. A step is formed between the two. And it becomes the structure which prevents the movement of the water droplet of a drain with the formed level | step difference.

  Thereby, in this embodiment, the water droplet of the drain adhering to the back surface of the cover part 24 of the neutralization apparatus 15 does not flow outside the annular projection 76, for example, the water droplet of the drain is an electrode arrangement region. It does not flow up to 63 (see FIG. 7). Therefore, the problem that the water level detection function malfunctions can be reliably prevented by the drain water droplets flowing to the electrode arrangement region 63 and coming into contact with the electrodes 68, 69, 70, 71. In the present embodiment, as shown in FIG. 7, a fixed member moving groove 75 is formed between the through hole 73 a of the insertion portion 73 and the electrode arrangement region 63. As a result, as shown in FIG. 11, a plurality of (two) steps Ld2 and Ld3 are formed in the direction from the through hole 73a of the insertion portion 73 toward the electrode arrangement region 63, instead of one. Become. For this reason, the movement of drain water droplets to the electrode arrangement region 63 can be more reliably prevented.

  In the above-described embodiment, the insertion portion 73 of the drain introduction portion 61 is configured to extend along the vertical direction, but the neutralization device of the present invention is not limited to this. For example, the insertion portion may extend in a direction including a component in a direction toward the side (a direction perpendicular to the vertical direction). That is, the insertion part may extend in an oblique direction. Similarly, the depth direction of the groove portion 74 of the drain introduction portion 61 is not limited to the direction along the vertical direction. You may be recessed in the diagonal direction from the top | upper surface of a cover part main body.

  In the above-described embodiment, the fixing member moving groove 75 that forms a fan-shaped space is provided. However, the neutralizing device of the present invention is not limited to this. The fixing member moving groove 75 is not necessarily provided. Further, the fixing member moving groove may be deformed according to the shape of the fixing tool, and may not be a fan shape.

  In the above-described embodiment, the upper end of the insertion portion 73 is positioned above the top surface of the lid main body portion 24a. However, the neutralization device of the present invention is not limited to this. For example, the upper end of the insertion portion may be the same height as the top surface of the lid main body portion 24a, or may be located below the top surface of the lid main body portion 24a. That is, the length of the portion where the drain hose 14 and the insertion portion overlap (insertion total length L2) is secured sufficiently long, and the portion where the drain hose 14 and the insertion portion overlap is sufficiently separated from the storage case 7. If it is in.

  Further, the shape and position of the fixed member moving groove 75 may be changed in accordance with the change in the position of the insertion portion (the position of the portion where the drain hose 14 and the insertion portion overlap). The fixing member moving groove 75 may be formed so that the fixing member 78 can be attached to and detached from the vicinity of the lower end of the drain hose 14 fitted in the groove portion 74.

1 Combustion device 3 Combustion section (combustor)
4 Primary heat exchanger 5 Secondary heat exchanger (heat exchanger)
6 Drain discharge system 14 Drain hose (upstream piping member)
15 Neutralizer 23 Main body (main body)
61 Drain introduction part 73 Insertion part 74 Groove part 75 Fixing member movement groove (fixing fixture installation space)
76 Torus (projection)

Claims (5)

In the combustion apparatus having a combustor and a heat exchanger that mainly recovers the latent heat of the combustion gas, the neutralization apparatus for neutralizing and discharging the drain generated in the heat exchanger from the combustion apparatus. And
In the upper part of the main body, there is provided a drain introduction part to which a pipe provided between the external members can be attached,
The drain introduction part has a tubular insertion part that can be inserted into the inner periphery of the end of the pipe, and a groove part that surrounds the insertion part,
The insertion portion communicates the outside and the inside of the main body,
The neutralization apparatus characterized by the base end part of the said insertion part being located in the said main body inside side from the opening surface of the said groove part.   The neutralization device according to claim 1, wherein the insertion portion extends along a vertical direction, and an opening surface of the groove portion is flush with an upper surface of the main body.   The neutralization device according to claim 1, wherein a fixing tool mounting space is formed in an upper portion of the main body, and the fixing tool mounting space is continuous with an outer peripheral portion of the groove. .   The neutralization device according to any one of claims 1 to 3, wherein a protrusion that protrudes inward from the outside is formed in a portion where the groove portion is formed on an inner peripheral surface inside the main body. .   A burner that burns fuel, a primary heat exchanger that mainly recovers sensible heat of combustion gas generated by operating the burner, and a secondary heat exchanger that mainly recovers latent heat of the combustion gas. A combustion apparatus comprising a drain drainage system including the neutralization apparatus according to any one of 1 to 4.

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