JP2019013864A - Neutralizer - Google Patents

Abstract

To provide a neutralizer possible to stably maintain a water sealed state by preventing a siphon phenomenon by opening a drainage flow path after water sealing.SOLUTION: There is provided a neutralizer for neutralizing condensed water and discharging it to outside, including: a reservoir for storing the condensed water; a neutralizing part in which a neutralizing agent for neutralizing the condensed water is sealed; a discharge part for discharging the condensed water neutralized in the neutralizing part from a drain outlet; and water level detection means for detecting a water level of the sealed water in the condensed water, the discharge part further including a waste water storage tank having a volume for storing a certain amount of condensed water.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a neutralizer for neutralizing acidic condensed water generated in a secondary heat exchanger such as a heat source machine.

  Conventionally, in a latent heat recovery type heat source machine that warms water using exhaust heat, a neutralizer (neutralizer) that neutralizes acidic condensed water generated in a secondary heat exchanger that uses exhaust heat Are included). Hereinafter, the neutralization device of the heat source device will be described as an example.

  FIG. 7 is a drawing schematically showing an internal configuration of a general latent heat recovery type heat source machine. In the case of the heat source device 100, the housing 101 includes a primary heat exchanger 102, a control board 103, a fuel supply device 104, and the like. And the secondary heat exchanger 105 using the exhaust heat of the primary heat exchanger 102 is provided above, and the neutralizer 110 is arranged so that the condensed water discharged from the secondary heat exchanger 105 flows. Yes. For this reason, in the case of the heat source apparatus 100 shown in the figure, the condensed water flows from the upper secondary heat exchanger 105 between the primary heat exchanger 102 and the control board 103 provided on the side thereof. A summing device 110 is arranged.

  As a prior art related to this type of neutralizing device, condensed water is introduced into a container containing a neutralizing agent therein, and the condensed water is formed between a plurality of partition walls provided in the container. There is a condensate neutralizer that is allowed to pass through and then discharged from the outlet (see, for example, Patent Document 1).

  As another prior art, the supernatant of the condensed water stored in the container containing the neutralizing agent is discharged from the discharge part so that the water level in the container is maintained within a predetermined range. There exists a neutralization apparatus (for example, refer patent document 2).

Japanese Patent No. 5045260 JP 2011-106761 A

  By the way, since the combustion exhaust gas flows into the neutralization device together with the condensed water, it is necessary to prevent the combustion exhaust gas from being discharged outside through the container of the neutralization device. For this purpose, the neutralization device is provided with a water-sealed electrode in the container, and after detecting that the amount of condensed water that can be water-sealed is stored in the container, the neutralized condensed water is discharged from the discharge section. To be. In order to control the discharge of the condensed water from the discharge part, a two-way valve (open / close valve) for opening and closing the drainage channel is provided downstream of the discharge part. The two-way valve is opened by detecting condensed water by a water-sealed electrode.

  However, when the two-way valve is opened and released after the amount of condensed water that can be sealed in the container is accumulated, a large amount of condensed water in the drainage channel flows out at a time. When a siphon phenomenon occurs due to a large outflow of this condensed water, the condensed water stored in the container may flow out and cause a water seal breakage.

  On the other hand, the housing 101 such as the heat source device 100 described above is preferably a compact design in order to reduce the installation space. However, in order to prevent the water seal breakage of the neutralizing device 110 described above, an air replacement hose or the like which is a separate component may be provided at the outlet of the condensed water of the neutralizing device 110. As a result, the configuration becomes complicated and it is difficult to reduce the size of the neutralizing device 110.

  In addition, none of the above prior arts describes anything about preventing water seal breakage due to siphon phenomenon when the drainage channel is opened and reducing the size of the neutralizing device.

  Then, an object of this invention is to provide the neutralization apparatus which can hold | maintain a water seal state stably so that a siphon phenomenon may not occur by opening of the drain flow path after water sealing.

  In order to achieve the above object, the present invention provides a neutralizing device for neutralizing condensed water and discharging the condensed water to the outside, and a storage unit for storing the condensed water, and neutralizing the condensed water. A neutralizing portion in which a neutralizing agent is sealed, a discharge portion for discharging the condensed water neutralized in the neutralizing portion from a drain outlet, and a water level detecting means for detecting a water seal level of the condensed water. The discharge unit includes a drainage storage tank having a volume for storing a certain amount of the condensed water.

  With this configuration, the drainage storage tank provided in the discharge section has a volume for storing a certain amount of condensed water, so that the condensed water on the downstream side of the drainage storage tank flows out at a time when the closure is released after the water seal. Even if it does, it can reduce the momentum of the condensed water which flows out into a drainage storage tank from a neutralization part, and can prevent a siphon phenomenon from occurring. In other words, by providing a drainage storage tank with an optimal space volume in the discharge part of the neutralizer, siphon phenomenon does not occur even if a large amount of condensed water on the downstream side flows out without providing separate parts. it can.

  The drainage storage tank includes a first side wall provided on the neutralization part side, a second side wall provided at a position facing the first side wall, the first side wall, and the second side wall. A bottom wall provided in between, and the drain outlet may be provided at a position offset toward the second side wall of the bottom wall.

  If comprised in this way, since condensed water will be discharged | emitted from the drain outlet of the position away from the position where condensed water flows in into a waste water storage tank from a neutralization part, the momentum of condensed water was suppressed with the capacity | capacitance of the waste water storage tank. The siphon phenomenon can be suppressed by discharging from the drain later.

  Moreover, the said neutralization part and the said waste water storage tank may be connected by the slit-shaped water inlet provided in the upper part of this waste water storage tank.

  If comprised in this way, the siphon phenomenon can be suppressed by restrict | limiting more the condensed water which flows into a drainage storage tank from the neutralization part by the slit-shaped water flow part provided in the upper part of the drainage storage tank.

  Moreover, the said water flow opening may be provided in the height from which the lowest part becomes an upper position rather than the detection part of the said water level detection means.

  If comprised in this way, since the position of the water flow outlet from which the condensed water flows out from the neutralization part to the discharge part is higher than the position where the water level detection means detects the water seal water level, the water level detection means uses the water seal level. When it is detected that the downstream side is opened, it is possible to suppress the condensed water from being discharged to the discharge portion from the water outlet located above the water level in the neutralization portion. Therefore, the siphon phenomenon can be suppressed.

  In addition, the drainage storage tank has a volume lower than the lowermost part of the water flow port equal to or equal to a volume of the condensed water that flows out at a time downstream of the water discharge port when the closure is released after water sealing. It may be configured to exceed the volume. “Volume of condensed water flowing out at a time downstream of the drain port” in the specification and claims includes the volume of the drain hose connected to the drain port.

  With this configuration, even if a large amount of condensed water on the downstream side of the drain outlet flows out at the same time when the closure is released after the water seal, the drainage storage tank has a volume that allows a large amount of the volume below to flow out from the lowermost part of the water inlet. Since it has the same or larger volume, it can absorb the temporary negative pressure during drainage and suppress the siphon phenomenon.

  According to the present invention, the drain buffer tank provided in the discharge section of the neutralizer prevents the siphon phenomenon from occurring even if a large amount of condensed water flows out when the drain flow path after water sealing is opened. It is possible to maintain a water-sealed state.

FIG. 1 is a longitudinal sectional view showing a neutralization apparatus according to an embodiment of the present invention. FIG. 2 is an enlarged cross-sectional view of the drainage storage tank shown in FIG. 3 is an enlarged cross-sectional view taken along the line III-III shown in FIG. 4 is an enlarged cross-sectional view taken along arrows IV-IV shown in FIG. FIG. 5 is a perspective view showing a use state of the neutralization device shown in FIG. 1. FIG. 6 is a cross-sectional view showing the relationship between the drainage storage tank and the drainage hose of the drainage section shown in FIG. FIG. 7 is an internal configuration diagram illustrating an example of a heat source device.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiment, the neutralization apparatus 10 suitable for an oil type heat source machine will be described as an example. The concept of the vertical and horizontal directions in the document of this specification and claims shall be the same as the concept of the vertical and horizontal directions in the state facing the neutralizing device 10 shown in FIG.

(Neutralizer structure)
FIG. 1 is a longitudinal sectional view showing a neutralizing device 10 according to one embodiment. The neutralization device 10 includes a hollow container 11. The container 11 is formed by, for example, blow molding. In the front view shown in FIG. 1, the container 11 of this embodiment is provided with a condensed water introducing portion 15 at the upper left portion and a storage portion 20 below the condensed water introducing portion 15. A neutralizing section 25 in which a neutralizing agent 28 is enclosed is provided in the downstream direction of the storage section 20 (downward to the right in the figure), and the discharge section 30 is provided in the downstream direction of the neutralizing section 25 (the right end in the figure). Is provided. In addition, since the water outlet 26 between the neutralization part 25 and the discharge part 30, and the outflow port 21 between the said storage part 20 and the neutralization part 25 are slit-shaped openings so that it may mention later, The block-shaped neutralizing agent 28 does not exit from the neutralizing portion 25. Moreover, the drainage part 13 used when draining the water in the container 11 is provided in the lower left part which the container 11 shows in figure.

  The storage unit 20 is formed with a size capable of storing a predetermined amount of condensed water W. The upper wall 12 of the storage unit 20 is sealed with an inlet 16 provided in the condensed water introduction unit 15, an overflow electrode 40 that detects a rise in the water level when the inside of the container 11 is clogged, and the inside of the container 11. A water seal electrode 45 is provided as water level detection means for detecting that the water seal water level M has been reached. One overflow electrode 40 is provided in the direction orthogonal to the paper surface in the figure, and two water seal electrodes 45 are provided in the direction orthogonal to the paper surface in the figure. When the water level of the condensed water W reaches these, it is energized and detected. ing. The arrangement of the overflow electrode 40 and the water sealing electrode 45 is an example.

  The water seal electrode 45 prevents the condensed water W from accumulating inside the container 11 so that the combustion exhaust gas flowing into the storage unit 20 is not discharged from the neutralization unit 25 to the outside of the neutralization device 10 via the discharge unit 30. For water sealing. By detecting the water sealing water level M with the water sealing electrode 45, a two-way valve 50 (open or closed) provided on the downstream side of a drain hose (drain pipe) 38 connected to the drain storage tank 31 of the discharge unit 30. The switching valve) is opened. The two-way valve 50 is in a closed state until the inside of the container 11 of the neutralizing device 10 is sealed with water, and is in an opened state after completion of the sealing.

  The water-seal electrode 45 has a lower end portion that is a detection unit 46, and the detection unit 46 is positioned below the draft surface L by a predetermined distance G. That is, the lowermost portion 26a of the water passage 26 for discharging the condensed water W from the neutralization portion 25 to the drainage storage tank 31 of the discharge portion 30 is the draft surface L, and the lowermost portion 26a of the water passage 26 is a water-sealed electrode. Forty-five detection units 46 are at an upper position at a predetermined distance G with respect to the water seal level M where the condensed water W is detected. By setting the lowermost part 26a of the water flow opening 26 to an upper position with respect to the water seal level M, the condensed water W of the neutralization unit 25 is drawn to the discharge unit 30 when the water seal is released, as will be described later. Is suppressed. The water sealing in the container 11 is achieved by the water level of the condensed water W accumulated in the storage unit 20 and the neutralization unit 25 being the water level detected by the water sealing electrode 45. When the water level is detected by the water seal electrode 45, the combustion exhaust gas does not flow out to the discharge unit 30 due to the condensed water W accumulated in the neutralization unit 25.

  Between the storage part 20 and the neutralization part 25, the outflow port 21 from which the condensed water W flows out of the storage part 20 is provided. Condensed water W flows from the reservoir 20 through the outlet 21 to the neutralization unit 25, flows through the neutralization unit 25 in the downstream direction, and flows from the neutralization unit 25 through the water outlet 26 to the discharge unit 30. Is discharged to the drainage storage tank 31. The drainage storage tank 31 has a volume for storing a certain amount of condensed water W, temporarily stores the condensed water W neutralized by the neutralization unit 25, and drains it from the drainage hose 38. Yes. At the upper part of the container 11 in the downstream part of the neutralizing part 25, an opening / closing lid 27 for introducing a neutralizing agent from the upper part is provided. By opening the opening / closing lid 27, the neutralizing agent 28 can be enclosed in the neutralizing portion 25.

(Configuration of drainage storage tank)
FIG. 2 is an enlarged cross-sectional view of the drainage storage tank 31 shown in FIG. 3 is an enlarged sectional view taken along the line III-III shown in FIG. 1, and FIG. 4 is an enlarged sectional view taken along the line IV-IV shown in FIG.

  As shown in FIGS. 2 and 3, the discharge unit 30 includes a water inlet 26 through which the condensed water W neutralized by the neutralizing unit 25 flows, a drainage storage tank 31 that can store the condensed water W, and the drainage storage tank. And a drain port 32 for discharging the condensed water W from 31. The drainage storage tank 31 includes a first side wall 33 located in the direction of the neutralization section 25, a second side wall 34 at a position facing the first side wall 33, and lower ends of the first side wall 33 and the second side wall 34. And a bottom wall 35 to be connected. The water inlet 26 is provided at the top of the first side wall 33, and the drain port 32 is provided at a position offset in the direction of the second side wall 34 away from the first side wall 33 of the bottom wall 35. Yes.

  As shown in FIGS. 3 and 4, the water passage 26 between the neutralization section 25 and the drainage storage tank 31 is a slit-like opening (for example, the width dimension is about 3 mm to 5 mm). By using the slit-shaped water inlet 26, the block-shaped neutralizing agent 28 (FIG. 1) enclosed in the neutralizing section 25 is prevented from moving to the drainage storage tank 31. The drainage storage tank 31 is connected to the first side wall 33 and the second side wall 34 by a third side wall 36, and the upper surface is closed by a top wall 37, which is a substantially rectangular box. The water outlet 26 and the drain port 32 are provided in the central portion in the width direction of the drain storage tank 31.

  As the drainage storage tank 31, for example, a distance H2 equal to or greater than the vertical height H1 of the slit-shaped water inlet 26 can be secured below. Moreover, the width direction dimension D2 of the drainage storage tank 31 can be set to about 50 mm, which is 10 times or more, when the width dimension D1 of the water flow opening 26 is 4 mm, for example. Accordingly, the drainage storage tank 31 has a certain amount of volume, and the condensed water W discharged from the water flow port 26 can be discharged into a wide space of the drainage storage tank 31 to reduce the flow velocity. That is, the drainage storage tank 31 has a function as a buffer tank. Further, the drainage port 32 provided in the bottom wall 35 is arranged away from the first side wall 33 where the water flow port 26 is located and is offset toward the second side wall 34 at a distance C with respect to the center line in the left-right direction of the bottom wall 35. can do. Thereby, the drainage port 32 can be separated from the water supply port 26 and a sufficient distance can be secured between them.

  The volume of the drainage storage tank 31 is equal to or exceeds the internal volume of the drainage hose 38 (FIG. 5) connected to the drainage port 32, and the volume below the draft surface L of the lowermost part 26 a of the waterflow port 26. It can be. Moreover, the whole volume of the drainage storage tank 31 can be made to exceed twice the internal volume of the drainage hose 38, for example.

  Accordingly, even if a large amount of the condensed water W downstream from the drain port 32 of the drainage storage tank 31 flows out at a time, the drainage storage tank 31 functions as a buffer tank depending on its volume and suppresses the momentum of the condensed water W. The siphon phenomenon in which the condensed water W of the sum part 25 is sucked into the drainage storage tank 31 from the water flow opening 26 can be prevented.

(Example of connection between neutralizer and other configurations)
FIG. 5 is a perspective view showing a use state of the neutralizing device 10 shown in FIG. 6 is a cross-sectional view showing the relationship between the drainage storage tank 31 and the drainage hose 38 of the drainage section shown in FIG. In FIG. 6, the drainage hose 38 is exaggerated. As shown in FIG. 5, the neutralizer 10 is disposed below the secondary heat exchanger 105 so that the condensed water discharged from the secondary heat exchanger 105 that uses the exhaust heat of the primary heat exchanger 102 flows. Be placed. A condensed water hose 17 provided in the secondary heat exchanger 105 is connected to the condensed water introduction part 15 of the neutralizing device 10. A drainage hose 38 is connected to the drainage port 32 provided in the lower part of the drainage storage tank 31 of the neutralization device 10, and is connected to a two-way valve 50 provided at a downstream position. The two-way valve 50 is provided with a drainage fitting 51 for discharging the neutralized condensed water W, and is drained from the drainage fitting 51 to the outside of the heat source apparatus 100 (FIG. 7).

  In the neutralization device 10 thus connected to the peripheral device, the condensed water W generated in the secondary heat exchanger 105 flows into the container 11 through the condensed water hose 17. Then, after neutralizing from the storage part 20 in the container 11 through the neutralization part 25, it is discharged to the drainage storage tank 31 of the discharge part 30. Thereafter, the water is drained from the drainage fitting 51 via the drainage hose 38 and the two-way valve 50.

(Explanation of neutralizer operation)
According to the neutralization apparatus 10, the secondary heat exchanger 105 (FIG. 5) is in a state where the two-way valve 50 provided in the downstream direction of the drainage hose 38 connected to the drainage storage tank 31 is closed. ) Is caused to flow into the reservoir 20 of the container 11 through the condensed water hose 17. The condensed water W that has entered the storage unit 20 flows from the outlet 21 to the neutralization unit 25 and is stored until the neutralization unit 25 is sealed with the condensed water W.

  When a predetermined amount of condensed water W accumulates in the storage unit 20 and the neutralizing unit 25 and the water sealing electrode 45 detects that the condensed water W has reached the water sealing water level M, the two-way valve 50 is opened and closed. Canceled. As a result, as shown in FIG. 6, a large amount of condensed water W of volume V1 (right hatched portion) is discharged at a time when the drainage hose 38 connected to the drainage port 32 of the drainage storage tank 31 accumulates. . However, the volume V2 (left oblique line portion) below the lowermost portion 26a (draft surface L) of the water inlet 26 in the drainage storage tank 31 is equal to or larger than the internal volume of the drainage hose 38. The temporary negative pressure generated by the large amount of downstream condensed water W flowing out at one time can be absorbed by the internal volume of the drainage storage tank 31. Accordingly, it is possible to suppress the condensed water W from being sucked into the drainage storage tank 31 from the neutralization unit 25, and it is possible to suppress the occurrence of siphon phenomenon at the time of releasing the closure after the water sealing and to perform the stable release.

  Further, the water seal level M for releasing the water seal is lower than the lowermost part 26 a of the water flow port 26 through which the condensed water W flows from the neutralization part 25 to the drainage storage tank 31. Thereby, since the water level of the neutralization part 25 is lower than the draft surface L when the two-way valve 50 is opened, a large amount of condensed water W in the drainage hose 38 of the drainage storage tank 31 flows out from the two-way valve 50 at a time. Even if the inside of drainage storage tank 31 is sucked by this, it can control that condensed water W of neutralization part 25 is sucked by drainage storage tank 31.

  Then, when the condensed water W that has entered the storage unit 20 subsequently flows out sequentially to the neutralization unit 25 and the condensed water W reaches the position of the lowermost part 26a of the water inlet 26 (draft surface L), the neutralization unit The condensed water W neutralized at 25 is discharged to the drainage storage tank 31. The condensed water W discharged to the drainage storage tank 31 is drained to the outside through the drainage hose 38 and the two-way valve 50 from the drainage port 32 below the drainage storage tank 31. After that, the condensed water W that has flowed into the storage unit 20 sequentially flows from the outlet 21 to the neutralization unit 25, neutralized by the neutralizing agent 28 of the neutralization unit 25, and then discharged from the water outlet 26 to the discharge unit 30. To the drainage storage tank 31, through the drainage hose 38 to the two-way valve 50, and drained from the drainage fitting 51.

(Summary)
As described above, according to the neutralization device 10, the drainage storage tank 31 provided in the discharge unit 30 of the neutralization device 10 allows the condensed water W to be discharged even if a large amount of downstream condensed water W flows out at a time. The momentum flowing out can be reduced so that the siphon phenomenon does not occur, and the water-sealed state in the container 11 can be kept stable.

  In addition, since it is not necessary to provide a separate part for water sealing, it is possible to reduce the size and cost by reducing the number of parts.

(Modification)
The shape of the drainage storage tank 31 in the above-described embodiment is an example, and may be a shape other than the rectangular shape shown in the figure. The shape of the drainage storage tank 31 is not limited to the above-described embodiment.

  Moreover, the structure of the storage part 20 and the neutralization part 25 in an above-described embodiment is also an example, and the thing of the structure where the storage part 20 and the neutralization part 25 were united, or the neutralizing agent 28 of the neutralization part 25 The structure which encloses may be different, and the structure of the storage part 20 and the neutralization part 25 is not limited to an above-described embodiment.

  Furthermore, the above-described embodiment shows an example, and the positional relationship between the neutralizing device 10 and the two-way valve 50, the length of the drainage hose 38, and the like are also examples, and the present invention is limited to the above-described embodiment. It is not a thing.

DESCRIPTION OF SYMBOLS 10 Neutralizer 11 Container 16 Inlet part 20 Storage part 21 Outlet 25 Neutralization part 26 Water inlet 26a Bottom part 28 Neutralizing agent 30 Discharge part 31 Drainage storage tank 32 Drainage outlet 33 1st side wall 34 2nd side wall 35 Bottom wall 36 Third side wall 38 Drain hose 45 Water seal electrode (water level detection means)
46 Detector 50 Two-way valve
W Condensate
L draft surface
M water seal level

Claims (5)

A neutralizing device for neutralizing condensed water and discharging it to the outside,
A reservoir for storing the condensed water;
A neutralization part in which a neutralizing agent for neutralizing the condensed water is enclosed;
A discharge part for discharging the condensed water neutralized in the neutralization part from a drain outlet;
A water level detecting means for detecting a water sealing water level of the condensed water;
With
The discharge unit includes a drainage storage tank having a volume for storing a certain amount of the condensed water.
A neutralizer characterized by that. The drainage storage tank includes a first side wall provided on the neutralization part side, a second side wall provided at a position facing the first side wall, and between the first side wall and the second side wall. Provided with a bottom wall,
The drain outlet is provided at a position offset toward the second side wall of the bottom wall,
The neutralization apparatus according to claim 1. The neutralization part and the drainage storage tank are connected by a slit-shaped water inlet provided in the upper part of the drainage storage tank.
The neutralization apparatus according to claim 1 or 2. The water flow opening is provided at a height at which the lowermost part is located above the detection part of the water level detection means.
The neutralization apparatus according to claim 3. The drainage storage tank has a volume that is lower than the lowermost part of the water flow port, and a volume that is equal to or exceeds the volume of the condensed water that flows out at a time downstream of the water discharge port when the closure is released after water sealing. Configured to,
The neutralization apparatus of any one of Claims 2-4.

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