JPH09287725A - Drain neutralising device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep the pH value of the water solution of a neutralising agent unifrom even when the amount of the neutralising agent is changed, and mix the water solution and drain under a quantitative condition by providing a mixing means which mixes the drain and the water solution in a chemical storage part by a specified ratio, and discharges them. SOLUTION: Drain stays in a storage chamber 23 and a siphon chamber 21c until the drain reaches the height of the top plate 21b of the siphon chamber 21c which is the maximum water level. Then, when the water level exceeds the upper end of the top plate 21b, the drain in the siphon chamber 21c flows out in a mixing storage part 7, and accompanying this, the drain in the storage chamber 23 is also drawn and flows out into the mixing storage part 7. For this reason, the drain levels in both chambers return to the minimum level, and a specified amount of the drain flows into the mixing storage part 7. In the meantime, at the start of the drain discharging, a sensor 24 operates, and a specified amount of water is fed from a water feeding passage 33 to a chemical storage part 3, and a specified amount of a water solution is extruded to the mixing storage part 7. As a result, the drain and the water solution which enter the mixing storage part 7, are joined and mixed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drain neutralization device, and more particularly to a device for neutralizing drain produced by condensation of steam in combustion exhaust.

[0002]

2. Description of the Related Art FIG. 7 is a heat exchange device according to the prior art.
It is an explanatory view of the drain neutralization device (1a) of (1). As shown in the figure, the heat exchange device (1) has a main heat exchanger (1
2) and the auxiliary heat exchanger (13) are housed. In this heat exchange device (1), the combustion exhaust gas from the burner (14) is absorbed by the main / sub heat exchangers (12) and (13) until the temperature falls below the dew point. Therefore, the heat exchange efficiency of the heat exchange device (1) is high. Then, in the can body (10), due to the heat absorption, the water vapor in the combustion exhaust gas is condensed to form a drain, and this drain is a heat exchange device by the drain discharge path (11) connected to the can body (10). Emitted from (1).

An acidic component such as nitrogen oxide contained in the combustion exhaust gas is dissolved in the drain, and a drain neutralization device (1a) for neutralizing the drain is provided in the drain discharge path.
It is inserted in (11). This drain neutralization device (1a) is a drug storage unit containing a neutralizing agent for neutralizing the drain.
It consists of (3). In this case, when the drain from the heat exchange device (1) passes through the drug reservoir (3), it comes into contact with the neutralizing agent, so that the acidic component of the drain (for example, pH
3) is neutralized.

[0004]

However, in this conventional technique, the drain generated in the heat exchange device (1) directly contacts the neutralizing agent when passing through the inside of the drug storage part (3). Therefore, the passage time, that is, the degree of contact with the neutralizing agent differs depending on the amount of drain produced. As a result, the pH value of the drain discharged from the drug reservoir (3) varies. In particular, when the amount of production is large, the degree of contact becomes small and the pH value does not rise.

Further, even when the neutralizing agent is consumed by use, the contact degree is lowered and the pH value is not raised. That is, the neutralization becomes insufficient. On the other hand, in order to prevent these inconveniences, it may be possible to store a large amount of neutralizing agent in the drug storage part (3) in advance, but when the amount of production is small or the initial use of the neutralizing agent Then, the reaction proceeds excessively and the pH becomes too large.

[0006] It is an object of the invention of claim 1 to prevent variations in the pH of discharged drain in the drain neutralization apparatus.

[0007]

According to a first aspect of the present invention, there is provided a device for neutralizing a drain produced by condensation of water vapor in combustion exhaust, the drain storing the produced drain. A reservoir (2), a drug reservoir (3) containing a neutralizing agent and storing its aqueous solution, and the drain reservoir (2)
And a mixing means (4) for mixing and discharging the drain and the aqueous solution in the drug reservoir (3) at a predetermined ratio. ”
It is characterized by the following.

In this case, the generated drain is
It is stored in the drain storage section (2). On the other hand, the drug reservoir (3) contains a neutralizing agent and an aqueous solution thereof. Then, by the mixing means (4),
The drain of the drain storage part (2) and the aqueous solution of the drug storage part (3) are mixed at a predetermined ratio and discharged. The drain and the aqueous solution undergo a neutralization reaction in a mixed state, and the mixed liquid after the neutralization is discharged.

In this case, since the aqueous solution is constantly maintained at a constant pH value by the neutralizing agent, neutralization with the drain having a constant pH value mixed at a predetermined ratio with the aqueous solution is performed. The degree of reaction is kept almost constant. Here, as in the invention of claim 2, "the mixing means (4) is
When the drain storage amount of the drain storage part (2) reaches a predetermined amount, a first discharge means (2a) for discharging a constant amount of drain from the drain storage part (2) and the first discharge means (2a) A second discharging means (3a) for discharging a fixed amount of the aqueous solution from the medicine storing section (3) in response to the operation, a drain discharged by the first discharging means (2a) and the second discharging means ( And a mixed storage part (7) for temporarily storing and discharging the aqueous solution discharged in 3a) in a mixed state.

In this device, a certain amount of drain is discharged from the drain storage section (2) by the first discharging means (2a), and by the second discharging means (3a) from the drug storage section (3). A certain amount of the aqueous solution discharged is mixed and stored
In (7), it is temporarily stored in a mixed state and discharged. A neutralization reaction between the drain and the aqueous solution proceeds in the storage state.

In this case, since the constant amount of the aqueous solution having a constant pH value and the constant amount of the drain having a constant pH value are mixed, the neutralization reaction is carried out under a quantitative condition to obtain a constant pH value. It becomes a mixed liquid. Further, as in the invention of claim 3,
"The mixing means (4) comprises a first discharge means (2a) for discharging a certain amount of drain from the drain storage part (2) when the drain storage amount of the drain storage part (2) reaches a predetermined amount. Then, the drain discharged by the first discharging means (2a) is charged into the drug reservoir (3), and the mixing means (4) further includes a mixed liquid of the charged drain and the aqueous solution. The third discharge means (3b) for discharging the liquid of substantially the same amount as the fixed amount in the medicine storage part (3).

In this device, a certain amount of drain discharged from the drain storage section (2) by the first discharge means (2a) is introduced into the drug storage section (3), and this drug storage section
It is mixed with the aqueous solution of (3), and the mixed solution is discharged by the third discharging means (3b). Therefore, even this one,
The neutralization reaction is performed under quantitative conditions, and the mixed solution having a constant pH value is discharged.

According to the invention of claim 4, "the mixing means (4) comprises the drain storage part (2) and the drug storage part (3).
A small hole part (5) provided so that the drain of the drain storage part (2) flows into the drug storage part (3), the drain of the drain storage part (2) and the drug storage part Fourth discharging means (6) for discharging the aqueous solution of the neutralizing agent due to the drained inflow from (3) while mixing it from the drug storing section (3)
And “provided”.

In this case, when the generated drain is stored in the drain storage section (2), the drain also flows into the drug storage section (3) through the small hole section (5). Can be stored. The drain that has flowed into the drug reservoir (3) in this stored state becomes the aqueous solution in which the neutralizing agent is dissolved.
At this time, the drain reservoir (2) and the drug reservoir (3)
Is only communicated with the small hole portion (5), so that the drain and the aqueous solution are hard to mix. Thereafter, the drain storage section is operated by the fourth discharging means (6).
The drain of (2) and the aqueous solution of the drug reservoir (3) are discharged while being mixed through the drug reservoir (3).
During the mixing, a neutralization reaction between the aqueous solution and the drain proceeds.

In this case, depending on the positional relationship between the drain storage part (2) and the drug storage part (3), the arrangement position of the small hole part (5), etc., the drain storage part (2) can be drained. Since the storage amount and the storage amount of the aqueous solution in the drug storage section (3) are determined, the neutralization reaction is performed under quantitative conditions. Further, as in the invention of claim 5, "the mixing means
(4) is a drain supply means (8a) for gradually supplying the drain of the drain storage part (2) to the aqueous solution stored in the drug storage part (3) from above, and the stored Drainage means for draining a mixed solution of the aqueous solution and the supplied drain by overflowing from the chemical reservoir (3)
And (8b).

In this case, the drain of the drain storage part (2) is gradually supplied from above to the aqueous solution of the drug storage part (3) by the drain supply means (8a). As a result, the upper layer portion of the aqueous solution and the drain are mixed, and the neutralization reaction proceeds during the mixing.
Then, the mixed liquid of the aqueous solution and the drain is drained by overflow from the drug reservoir (3) by the draining means (8b).

In this case, during the mixing, the drain undergoes a neutralization reaction only with the upper layer portion of the aqueous solution, so that this reaction does not proceed excessively.

[0018]

As described above, in the inventions of claims 1 to 4, the pH value of the aqueous solution is constant even if the amount of the neutralizing agent changes, and the aqueous solution and the drain are kept under quantitative conditions. Since they are mixed, variations in pH value of the mixed liquid are prevented. Further, even if the amount of drain generated changes, the aqueous solution and the drain are mixed under the quantitative conditions, and thus the variation is prevented also in this respect.

In the invention of claim 5, the neutralization reaction does not proceed excessively and the pH value does not become too large.
Variation in H value is prevented.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described.
This will be described with reference to the drawings. [Embodiment 1] FIG. 1 is an explanatory diagram of a drain neutralization device (1a) of a heat exchange device (1) according to Embodiment 1 of the present invention. The first embodiment corresponds to the invention of claim 2 described above.

* Heat Exchanger (1) * As shown in the figure, the heat exchanger (1) comprises a burner (14) in a can body (10) and main and auxiliary heat exchangers located below the burner (14). (12) (1
3), and a burner (14) at the top of the can body (10).
A fan (15) for supplying combustion air is connected in series. The main heat exchanger (12) is the sub heat exchanger (13)
The water passage pipe of the main heat exchanger (12) is located closer to the burner (14) than the water passage pipe of the sub heat exchanger (13). Therefore, the combustion exhaust gas from the burner (14) first passes through the main heat exchanger (12). At this time, sensible heat is absorbed from the combustion exhaust gas by the main heat exchanger (12). After that, when passing through the sub heat exchanger (13), the sub heat exchanger (13)
The latent heat is absorbed from the combustion exhaust gas. By this latent heat absorption, the combustion exhaust gas is cooled to a temperature below the dew point, and drain is generated mainly in the sub heat exchanger (13). This drain has
Acidic corrosive components such as nitrogen oxides contained in the combustion exhaust are dissolved.

Further, the can body (10) has a gas supply path (14a) for supplying gas to the burner (14) and an exhaust passage (16) for discharging the combustion exhaust gas after absorbing the latent heat. ) And a drain discharge path (11) for discharging the drain to the outside. A drain neutralization device (1a) described later is inserted in the drain discharge path (11). * Drain neutralizer (1a) * The drain neutralizer (1a) consists of a drain container (20) for temporarily storing the drain from the heat exchanger (1) and a large number of granular particles made of magnesium oxide, calcium carbonate, etc. Neutralizer for (30) (30)
And a mixing reservoir (3) that temporarily stores the drain from the drain container (20) and the aqueous solution from the drug reservoir (3) in a mixed state. 7)
The mixing reservoir (7) is provided below the drain container (20) and horizontally to the drug reservoir (3).

The drain container (20) includes a water sealing chamber (22) in which a drain inflow pipe (220) serving as an inlet of the drain from the heat exchange device (1) is inserted, and the water sealing chamber (22). Continuous and sealed room (22)
A storage chamber (23) that stores drainage that overflows from
In the storage chamber (23), there is a siphon (21) connected at the lower end on the opposite side of the water sealing chamber (22). Siphon (2
1) is a configuration including a drain discharge pipe (210) (for example, a diameter of 5 mm) vertically inserted in the siphon chamber (21). The drain discharge pipe (210) and the top plate of the siphon chamber (21c).
Considering the diameter of the drain discharge pipe (210), the surface tension of the drain, and the speed of the water level rise of the drain between (21b) and the level of (21b), there is no air pocket below the top plate (21b) when the water level rises. Is provided with a predetermined gap (for example, 5 mm).
The lower end of the drain discharge pipe (210) is the mixing reservoir.
It is inserted in (7). At the lower end of the drain discharge pipe (210), a sensor (24) such as a water flow switch or an electrode sensor that detects the passage of the drain, that is, the operation of the siphon (21) and outputs a detection signal is provided. .

In this case, the storage chamber (23) and the siphon chamber (21c) are the drain storage part (2) described in claim 2 above, and the siphon (21) is the drain storage portion (2) described in claim 2 above. 1 means for discharging (2a). The drug reservoir (3) hangs down from the upper wall of the drug reservoir (3) and mixes the space in the upper half of the drug reservoir (3) with the mixture reservoir (7).
The partition plate (31) is divided into one side and the other side. At the upper end of the drug reservoir (3) on the mixing reservoir (7) side, the aqueous solution of the neutralizing agent stored in the drug reservoir (3) is placed in the mixing reservoir (7). Outlet (32)
Is provided. In addition, a water supply path (33) for supplying water to the medicine storage section (3) is connected to the upper end portion of the medicine storage section (3) opposite to the outlet (32). (3
A solenoid valve (330) is inserted in 3). This solenoid valve (3
The control circuit (9) is configured so as to be opened or closed by the control signal from the control circuit (9).
The control signal for causing the open state is output for a certain period of time from the time when the detection signal is received.

A discharge pipe (71) for discharging the mixed liquid of the drain and the aqueous solution is connected to the bottom wall of the mixing storage part (7). The diameter of the discharge pipe (71) is set so that the discharge amount is smaller than the total inflow amount of the drain and the aqueous solution, whereby the mixed liquid is temporarily stored in the mixing storage part (7). And can be gradually discharged. In this case, the sensor (24), the control circuit (9), the water supply path (33) and the solenoid valve (330) correspond to the second discharging means (3a) described in claim 2. In addition, siphon (21) and mixing reservoir
(7) is added to the mixing means according to claim 1 (4)
Is equivalent to

* Operation of the drain neutralizer (1a) * In this case, when the above-mentioned heat exchange device (1) is in an operating state, the drain is discharged to the drain discharge path (11) of this heat exchange device (1). Is discharged. This drain flows into the drain inflow pipe (220) and then flows into the storage chamber (23) and the siphon chamber (21c) via the water sealing chamber (22). This drain is connected to the communication port (21a) between the siphon chamber (21c) and the storage chamber (23) shown by the chain double-dashed line in FIG.
From the state of the lowest water level that corresponds to the height of the reservoir to the state of the highest water level that corresponds to the height of the top plate (21b) of the siphon chamber (21c) shown by the solid line, the storage chamber (23) and the siphon chamber (21c) It is saved.

At this time, the storage chamber (23) and the siphon chamber (2
When the water level in 1c) exceeds the upper end of the drain discharge pipe (210),
Due to the surface tension, the drain between the drain discharge pipe (210) and the top plate (21b) exists in a state where there is no air pool, and the upper end opening of the drain discharge pipe (210) is blocked. After this state, when the water level reaches the top plate (21b), the closed state of the drain discharge pipe (210) due to the surface tension is broken, and the drain flows into the drain discharge pipe (210). This causes the drain in the siphon chamber (21c) to flow out to the mixing storage part (7) via the drain discharge pipe (210), and the drain in the storage chamber (23) is also sucked along with this, and the mixing storage part
It leaks to (7).

Due to this outflow, the water level of the drain in the storage chamber (23) and the siphon chamber (21c) returns to the lowest water level.
Since the drain storage amount between the lowest water level and the highest water level is constant, a fixed amount of drain flows into the mixing storage section (7). The drain is acidic and has a pH of about 3, for example. On the other hand, drain discharge pipe
At the start of drain discharge from (210), a detection signal is output from the sensor (24) and applied to the control circuit (9). By this control circuit (9), the solenoid valve (330) is kept open for a certain period of time, and a certain amount of water is supplied from the water supply path (33) to the medicine reservoir (3). By this water supply, the drug reservoir
(3) A certain amount of the aqueous solution is extruded into the mixing storage part (7) through the outlet (32). The amount of the aqueous solution pushed out is set to a value smaller than the initial storage amount of the aqueous solution in the drug storage section (3). Incidentally, the aqueous solution is
The above-mentioned neutralizing agent melts in and becomes alkaline,
For example, the pH is about 10.

Then, the drain and the aqueous solution which have entered the mixing storage part (7) merge in the mixing storage part (7) to be in a mixed state, and the drain is neutralized by the aqueous solution. That is, the drain has a pH of 7. In this case, even if the neutralizing agents (30) and (30) are reduced, the pH value of the equilibrium state of the aqueous solution is constant, so that the variation of the pH value after the neutralization reaction of the drain is prevented.

Further, since the drain and the aqueous solution react with each other in fixed amounts, the effect of preventing the variation is further improved. Furthermore, since the neutralization reaction proceeds while the mixed liquid of the drain and the aqueous solution is temporarily stored in the mixing storage part (7), the neutralization reaction is ensured. The above process is repeated every time the drain water level in the storage chamber (23) reaches the maximum water level and the siphon (21) operates.
In addition, the water supplied to the drug reservoir (3) contains the neutralizing agent (3
By melting 0) and (30), the above-mentioned aqueous solution having a pH of about 10 is obtained by the time the next step is started. [Second Embodiment] FIG. 2 is an explanatory diagram of a drain neutralization device (1a) according to a second embodiment. The second embodiment corresponds to the invention of claim 2 described above.

As shown in the figure, the drain neutralization device (1a)
Is the drain container (20) and the continuous mixing reservoir below it.
(7) consists of The drain container (20) includes a water sealing chamber (22) similar to that of the first embodiment, a storage chamber (23) arranged so as to surround the water sealing chamber (22), and the storage chamber (23). On the other hand, the medicine storage part (3) is connected to one side in the horizontal direction, and the siphon (21) is connected to the other side.

The siphon (21) has the same structure as that of the first embodiment, but the open portion at the lower end of the drain discharge pipe (210).
(211) is provided so as to coincide with the wall part (200) between the drain container (20) and the mixing storage part (7). Drug storage
(3) is a structure provided with a horizontal perforated plate (34) that divides it into upper and lower parts. (30) is housed.
Further, an inlet (36) for the drain from the storage chamber (23) is provided at the upper end of the drug storage unit (3) on the storage chamber (23) side. Drain flowing from this inlet (36) is a neutralizing agent.
(30) An aqueous solution having a pH of about 10 is obtained by dissolving (30). This inlet (36) is located at a height where the drain flows into the drug reservoir (3) immediately before the drain water level in the storage chamber (23) reaches the above-mentioned maximum water level at which the siphon (21) operates. Therefore, it is difficult for the aqueous solution in the medicine reservoir (3) and the drain in the reservoir chamber (23) to mix with each other at the highest water level at which the siphon operates. Furthermore, on the wall (200) of the drain container (20),
An outlet (32) is provided for putting the aqueous solution in the drug reservoir (3) into the mixing reservoir (7).

The mixing and storing section (7) is provided with the discharge pipe (71) similar to that of the first embodiment. In addition, inside the mixing reservoir (7), the drain discharge pipe (2
There is provided a lever (73) which is rotatably supported about a rotation shaft (73a) at a substantially intermediate point between the opening (211) at the lower end of the portion (10) and the outlet (32). This lever (73) has its first end (74) on the input side facing the opening (211), and
The second end portion (75) on the output side faces the outflow port (32). The lever (73) has a structure in which the valve body (77) located inside the drug reservoir (3) is connected to the second end (75) via the valve shaft (76). . In addition, the second end (75) and the wall (2
A push spring (78) which is fitted onto the valve shaft (76) is interposed between the pressure spring (78) and the valve (00). On the other hand, in the wall portion (200), a valve seat (38) facing the valve body (77) is formed on the outer periphery of the outflow port (32).
This lever (73) is the second discharging means (3) according to claim 2.
a).

In this case, as in the first embodiment,
The drain that has flowed into the drain inflow pipe (220) flows into the storage chamber (23) and siphon chamber (21c) through the water sealing chamber (22), and then overflows from the inflow port (36), and the drug storage portion (3)
Flows into. After that, when the storage chamber (23) and the drug storage section (3) reach the maximum water level, the drain inside the siphon chamber (21c) and the storage chamber (23) is mixed by the operation of the siphon (21). It is discharged to the storage part (7).

During this discharge, the first end portion (74) of the lever (73) is pushed downward by the drain and the second end portion (75) is attached with the push spring (78) by the rotation of the lever (73). It is pushed up against the power. In this state, the valve disc (7
7) is opened, and the aqueous solution of the neutralizing agent flows out to the mixing reservoir (7) through the outlet (32). And siphon
When the discharging operation of (21) is completed, the lever (73)
By (78), the initial state is restored, and the valve body (77) is closed. Since the drain discharge time by the siphon (21) is constant, and the neutralizing agent aqueous solution discharge time from the drug reservoir (3) is also equal, the mixing reservoir (7) contains a fixed amount of the drain. And the aqueous solution will flow in.

Therefore, also in the second embodiment, a certain amount of drain and a certain amount of the aqueous solution are mixed, and the neutralization reaction is reliably performed up to a certain pH value. [Third Embodiment] FIG. 3 is an explanatory view of a drain neutralization device (1a) according to a third embodiment. The third embodiment corresponds to claim 3 described above.

As shown in the figure, the drain neutralizer (1a)
Is a drain container (20) similar to that of the first embodiment, a drug reservoir (3) continuous therebelow, and this drug reservoir (3)
And a mixing reservoir (7) that is continuous in the horizontal direction. The drug reservoir (3) is configured such that an outlet (32) similar to that of the first embodiment is provided in the middle of the side wall of the mixture reservoir (7) side. Lower bottom space (3
In the inside of 9), there is provided a vertical perforated plate (34) which divides it into the mixing storage part (7) side and the opposite side. The drain discharge pipe (210) of the siphon (21) is located directly above the portion of the bottom space (39) on the side of the mixing reservoir (7), and the drain discharge pipe (210) of the siphon (21) is located on the opposite side of the bottom space (39). Part of the neutralizer (30) (3
0) is housed. The bottom space (39) is filled with an aqueous solution in which the neutralizing agents (30) and (30) are dissolved in the drain from the drain container (20).

In this case, the siphon (21) is activated and a certain amount of drain is sent downward from the siphon (21). As a result, the drain is in a state of being mixed with the aqueous solution in the bottom space (39), and the amount of the drain is constant in the mixed solution with respect to the volume of the bottom space (39). The surplus overflows and flows out from the outlet (32) to the mixing storage (7). The mixed solution is temporarily stored in the mixed storage section (7), and the neutralization reaction of the mixed solution proceeds during the temporary storage.

Even in this case, since the amount of drain supplied from the siphon (21) and the capacity of the bottom space (39) are constant, the mixing of the drain and the aqueous solution is carried out under quantitative conditions. Therefore, the neutralization reaction is reliably performed up to a certain pH value. Further, the drain discharged from the drain storage part (2) falls to the part of the bottom space (39) closer to the mixing storage part (7) than the perforated plate (34). 30) The inconvenience of scattering (30) is prevented, and
It is possible to reliably overflow the mixed liquid without overflowing only the aqueous solution. [Fourth Embodiment] FIG. 4 is an explanatory view of a drain neutralization apparatus (1a) according to a fourth embodiment. The fourth embodiment corresponds to claim 4 described above.

As shown in the figure, the drain neutralization device (1a)
Is basically the same as the drain container (20) of the first embodiment. The storage chamber (23) of the drain container (20) is vertically divided into a first storage chamber (26) on the sealing water chamber (22) side and a second storage chamber (27) on the siphon (21) side. The partition wall (25) is provided, and a small hole portion (5) that connects the first storage chamber (26) and the second storage chamber (27) is provided at the lower end of the partition wall (25). ing. The second storage chamber (27) contains the neutralizing agents (30) and (30).

In this case, when the drain from the heat exchange device (1) flows into the first storage chamber (26) through the sealing water chamber (22),
The small hole portion (5) is stored in the first storage chamber (26).
It also flows into the second storage chamber (27) and the siphon chamber (21c) via the and is stored. In the first and second storage chambers (26) and (27) and the siphon chamber (21c), the water level of the drain similarly rises. During the rise of the water level, the drain stored in the second storage chamber (27) becomes an aqueous solution in which the neutralizing agents (30) (30) are dissolved. In this state, the first storage chamber (26) and the second storage chamber (2
Since it is only communicated with 7) through the small hole portion (5), the drain and the aqueous solution hardly mix with each other. Then, when the water level of the first and second storage chambers (26) (27) reaches the above-mentioned maximum water level that matches the ceiling height of the siphon chamber (21c), the siphon (21) is activated and the second storage chamber (27) and the siphon chamber (21c) the aqueous solution is discharged,
The drain in the first storage chamber (26) is discharged through the small hole portion (5). Since the drain and the aqueous solution are discharged while being mixed, the neutralization reaction proceeds during the discharging.

Even in this case, since the drain storage amount in the first storage chamber (26) and the storage amount of the aqueous solution in the second storage chamber (27) and the siphon chamber (21c) are constant, respectively. Mixing is carried out under quantitative conditions to ensure that the neutralization reaction is carried out to a certain pH value. In this one, the first storage chamber (26)
Is the drain storage part (2) according to claim 4, and the second
The storage chamber (27) is the medicine storage unit (3) according to claim 4 and the siphon (21) is the fourth discharge means (6) according to claim 4. [Fifth Embodiment] FIG. 5 is an explanatory view of a drain neutralization apparatus (1a) according to a fifth embodiment. The fifth embodiment also corresponds to the above-mentioned claim 4.

As shown in the figure, the drain neutralizer (1a)
Is basically the same drain container (20) as in Embodiment 4 above.
Below this, a mixing and storing section (7) similar to that of the first embodiment is connected. Also, the drain container (20) is
It is configured to have a horizontal partition wall (25) that partitions 3) into an upper first storage chamber (26) and a lower second storage chamber (27), and a siphon ( A small hole (5) similar to that of the fourth embodiment is provided at the end on the 21) side. Then, in the space below the partition wall (25) in the storage chamber (23), the neutralizing agent (30) (3
0) is housed.

In this case, when the drain from the heat exchange device (1) flows into the first storage chamber (26) through the water sealing chamber (22),
The second storage chamber (27) and siphon chamber (2) through the small hole (5).
It flows into 1c) and is stored. And the water level is the partition wall
When it becomes higher than (25), the drain is also stored in the first storage chamber (26). During the rise of the water level, the drain in the second storage chamber (27) and the siphon chamber (21c) becomes an aqueous solution in which the neutralizing agents (30) (30) are dissolved. At this time, since the first storage chamber (26) and the second storage chamber (27) are only communicated with each other through the small hole portion (5), the drain and the aqueous solution hardly mix with each other. .

When the stored water level in the siphon chamber (21c) reaches the above-mentioned maximum water level, the siphon (21) is activated and the aqueous solution in the second storage chamber (27) flows out to the mixing storage part (7). At the same time, the drain in the first storage chamber (26) flows out to the mixing storage portion (7) through the small hole portion (5). At the time of this outflow, the drain and the aqueous solution are mixed and discharged in the drain discharge pipe (210), and the drain is neutralized. Furthermore,
The mixed liquid of the drain and the aqueous solution that has flowed out to the mixing reservoir (7) has the same diameter as that of the discharge pipe (71) of the first embodiment, and therefore the mixing reservoir (7) After being temporarily stored at, it is discharged from the discharge pipe (71).

Even in this case, the drain storage amount in the first storage chamber (26) and the storage storage amount of the aqueous solution in the second storage chamber (27) and the siphon chamber (21c) are constant. And the aqueous solution are mixed under quantitative conditions. [Sixth Embodiment] FIG. 6 is an explanatory view of a drain neutralization device (1a) according to a sixth embodiment. The sixth embodiment corresponds to the above-mentioned claim 5.

As shown in the figure, the drain neutralization device (1a)
Is a drain container basically similar to that of the first embodiment.
(20). The drain container (20) is
An upwardly opened drug reservoir (3) containing the neutralizing agent (30) (30) is provided between the reservoir 2 (2) and the reservoir (23). In the sixth embodiment, the storage chamber (23) is the water sealing chamber (22).
It functions as a reservoir for the mixed liquid of the drain from the chemical and the aqueous solution of the neutralizing agent (30) (30) from the drug reservoir (3).

The drug reservoir (3) has a water seal chamber (22) at its upper end.
It is configured to be lower than the upper end and higher than the highest water level that matches the ceiling height of the siphon chamber (21c). The chemical reservoir (3) is filled with the drain from the sealed water chamber (22), and the drain is an aqueous solution in which the neutralizing agents (30) and (30) are dissolved. In this one, the heat exchange device
The drain from (1) is gradually supplied to the drug reservoir (3) from above through the water sealing chamber (22). The drain flows to the siphon (21) side while being mixed with the upper layer part of the aqueous solution in the drug reservoir (3), overflows from the drug reservoir (3), and is stored in the storage chamber (23). At this time, since the drain is mixed only with the upper layer part of the aqueous solution, the neutralization reaction does not proceed excessively.

In this case, the water sealing chamber (22) has the above-mentioned claim 5.
It is the drain storage part (2) described in (1), and the height relationship between the water sealing chamber (22) and the drug storage part (3) (the water sealing chamber (2
2) is high), and thus the drain supply means according to claim 5
(8a) is configured, and the height relationship between the drug storage part (3) and the storage chamber (23) (the drug storage part (3) is higher than the storage chamber (23)) is set forth in claim 5 above. The drainage means (8b) is configured.
In the sixth embodiment, the siphon 21 may be omitted.

It should be noted that any of the above-described embodiments can be carried out in addition to the heat exchange device (1) as long as it produces drain from combustion exhaust.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a drain neutralization device (1a) of a heat exchange device (1) according to Embodiment 1 of the present invention.

FIG. 2 is an explanatory diagram of a drain neutralization device (1a) according to a second embodiment.

FIG. 3 is an explanatory diagram of a drain neutralization device (1a) according to a third embodiment.

FIG. 4 is an explanatory diagram of a drain neutralization device (1a) according to a fourth embodiment.

FIG. 5 is an explanatory diagram of a drain neutralization device (1a) according to a fifth embodiment.

FIG. 6 is an explanatory diagram of a drain neutralization device (1a) according to a sixth embodiment.

FIG. 7 is an explanatory view of the drain neutralization device (1a) of the heat exchange device (1) in the prior art.

[Explanation of symbols]

 (2) ・ ・ ・ Drain storage part (3) ・ ・ ・ Drug storage part (4) ・ ・ ・ Mixing means (2a) ・ ・ ・ First discharging means (3a) ・ ・ ・ Second discharging means (7) ・..Mixing storage part (3b) ... Third discharge means (5) ... Small hole part (6) ... Fourth discharge means (8a) ... Drain supply means (8b) ... Drainage means

Continued Front Page (72) Yuko Fujimine Inventor Yuko Fujimine 2-26 Fukuzumicho, Nakagawa-ku, Nagoya City Rinnai Corporation

Claims (5)

[Claims] 1. A device for neutralizing drain produced by condensation of water vapor in combustion exhaust gas, comprising: a drain storage part (2) for storing the produced drain; The stored drug reservoir (3) and the drain reservoir
A drain neutralization device comprising: a mixing unit (4) that mixes the drain of (2) and the aqueous solution of the drug reservoir (3) at a predetermined ratio and discharges the mixture. 2. The mixing means (4) comprises the drain storage section.
First discharge means (2a) for discharging a fixed amount of drain from the drain storage section (2) when the drain storage amount of (2) reaches a predetermined amount
And a second discharging means (3a) for discharging a fixed amount of the aqueous solution from the medicine storing section (3) in response to the operation of the first discharging means (2a), and the first discharging means (2a). Mixing and storing section for temporarily storing and discharging the discharged drain and the aqueous solution discharged by the second discharging means (3a) in a mixed state.
The drain neutralization device according to claim 1, further comprising (7). 3. The mixing means (4) comprises the drain storage section.
First discharge means (2a) for discharging a fixed amount of drain from the drain storage section (2) when the drain storage amount of (2) reaches a predetermined amount
The drain discharged by the first discharging means (2a) is introduced into the medicine storing section (3), and the mixing means (4)
Further comprises third discharging means (3b) for discharging from the medicine storing part (3) a liquid of substantially the same amount as the fixed amount in the mixed liquid of the introduced drain and the aqueous solution. The drain neutralization device according to claim 1. 4. The mixing means (4) comprises the drain storage section.
The drain storage section is provided between the (2) and the drug storage section (3).
The small hole portion (5) provided so that the drain of (2) flows into the drug storage part (3), the drain of the drain storage part (2) and the drain that has flowed into the drug storage part (3). The drain neutralization device according to claim 1, further comprising: a fourth discharge means (6) for discharging the aqueous solution of the neutralizing agent according to (4) while mixing the aqueous solution of the neutralizing agent from the drug storing section (3). 5. The mixing means (4) comprises the drain storage section.
(2) drain supply means (8a) for gradually supplying the drain to the aqueous solution stored in the drug storage section (3), the stored aqueous solution and the supplied drain The drain neutralization device according to claim 1, further comprising drainage means (8b) for draining the mixed liquid of (1) from the drug storage part (3) by overflow.