JPH10309587A - Neutralizing agent and neutralizing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the lowering of neutralizing capacity with time by forming a neutralizing agent into a sheet like form. SOLUTION: A neutralizing agent 2 is composed of a 1st sheet body 2a and a 2nd sheet body 2b having a square and a fixed thickness. Each of the sheet bodies 2a and 2b is composed of an alkaline material such as magnesium oxide and calcium carbonate or an amphoteric metal such as aluminum, zinc and tin, is made to the same dimension and weight and the ratio of the thickness T to the length A of the cross-section cut in the thickness direction is set to smaller than 1/5. The suppressing effect of the lowering of neutralization capacity with time is improved by this composition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a neutralizing agent,
It relates to a neutralizing agent for neutralizing drain and the like.
The present invention also relates to a neutralization device, particularly to a neutralization device provided in a combustion device that generates drain.

[0002]

FIG. 11 is a sectional view of a storage container (8). FIG. 12 is a front view of a conventional neutralizing agent (9a),
FIG. 13 is a perspective view of another conventional neutralizing agent (9b). Recently, there is a so-called condensing type boiler (not shown) that absorbs not only sensible heat but also latent heat from combustion exhaust gas to improve heat exchange efficiency as a boiler used in a hot water supply device or the like. In this type, since water in the combustion exhaust is condensed due to latent heat absorption, a water-drop-like drain adheres to the inner surface of the boiler casing.

[0003] Since acidic corrosive components such as nitrogen oxides in the combustion exhaust gas are dissolved in the drain, the condensing type boiler is designed so that the drain flows into the condensing type boiler as shown in FIG. And a storage container (8) for temporarily storing the drain. In order to neutralize the stored drain, a spherical neutralizing agent (9a) (9a) is stored in the storage container (8) shown in FIG. The storage container (8) is provided with a siphon (8a) for discharging a substantially constant amount of drain from the storage container (8) every time the storage amount of the drain reaches a predetermined amount. Therefore, the drain that has flowed into the storage container (8) is stored until the stored amount reaches a predetermined amount, and is neutralized by a neutralization reaction with the neutralizing agents (9a) and (9a) during the storage. Then, the neutralized drain is discharged from the storage container (8) by the siphon (8a). This prevents corrosion of piping and the like provided downstream of the storage container (8).

As the neutralizing agent (9a) is used, its surface in contact with the drain is gradually consumed, and the neutralizing agent (9a) is gradually reduced from the state shown in FIG. 12A to the state shown in FIG. 12B. Further, conventionally, there is a tablet-like neutralizing agent (9b) as shown in FIG. The surface area of the neutralizing agent (9b) is also gradually consumed with its use, and is gradually reduced from the state of FIG.

[0005] In any of these neutralizing agents (9a) and (9b), the reduced weight is used for the neutralization reaction.

[0006]

However, these conventional neutralizing agents (9a) and (9b) are all formed in blocks.
Since the weight loss per unit time is reduced at an early stage, the neutralization ability is apt to be reduced at an early stage, although the use time until its disappearance is long. Therefore, even if various conditions are set so that the pH reached by the neutralization reaction is "7", the pH reached reaches a lower level early after the start of use, and the pH that can be discharged to piping or the like is reduced. Beyond range. Therefore, the neutralizing agents (9a) and (9b) cannot be used with most of them remaining.

[0007] It is an object of the present invention to provide a neutralizing agent which suppresses a decrease in neutralizing ability with time. A sixth object of the present invention is to provide a neutralization device in which the neutralization ability is prevented from decreasing over time.

[0008]

Means for Solving the Problems The means for solving the problems of the invention of claim 1 is characterized by "having a sheet shape".
As the neutralizing agent is used, the surface in contact with the drain is consumed and the weight gradually decreases. And, since this neutralizing agent has a sheet shape, a decrease in weight loss per unit time due to the neutralization reaction is suppressed during the period from the start of use to disappearance, and the weight loss is a block shape. It is larger than the weight loss per unit time of the neutralizing agent.

Here, as in the second aspect of the present invention, the "sheet shape may be such that the ratio of the thickness to the length of the cross section cut in the thickness direction is smaller than 1/5". Claim 3
The problem solving means of the present invention is characterized by "having a concave portion on the surface". With this neutralizing agent, the outer surface portion in contact with the drain is consumed with use, and the surface area of the outer surface portion decreases. Further, the inner surface of the concave portion in contact with the drain is consumed, and the surface area of the inner surface increases. Thereby, during the period from the start of use of the neutralizing agent to the disappearance thereof, the total surface area of the surface area of the outer surface portion and the surface area of the inner surface portion is larger than the total surface area of the neutralizing agent having no concave portion. Also increases.

Therefore, during the period from the start of use of the neutralizing agent to the disappearance thereof, the weight loss per unit time in proportion to the total surface area is smaller than the weight loss per unit time of the neutralizing agent having no concave portion. Also increases. According to a fourth aspect of the present invention, there is provided a means for solving the problem, "having a through hole". With this neutralizing agent, the outer surface is consumed and its surface area is reduced with its use, and the inner surface of the through hole is consumed and its surface area is increased. Accordingly, during the period from the start of use of the neutralizing agent to the disappearance thereof, the total surface area of the surface area of the outer surface portion and the surface area of the inner surface portion is equal to the total surface area of the neutralizing agent having no through-hole. Larger than.

Accordingly, during the period from the start of use of the neutralizing agent to the disappearance thereof, the weight loss per unit time in proportion to the total surface area is reduced by the weight loss per unit time of the neutralizing agent having no through hole. Larger than. As in the fifth aspect of the present invention, it may be “formed in a plate shape and a plurality of the through holes penetrate from the front surface to the back surface”.

[0012] The means for solving the problem of the invention according to claim 6 is a neutralization device provided in a combustion device that generates drain, wherein a storage container for storing the drain, and a storage container that is stored in the storage container. 6. A method for neutralizing drainage.
And a neutralizing agent according to any one of the above).

[0013] In this case, the unit time of the neutralizing agent in the storage unit may be changed from the start of use of the neutralizing agent to the disappearance of the neutralizing agent in the same manner as described in the above-mentioned items. The decrease in weight per hit is suppressed. As in the invention of claim 7, "the storage container discharges a substantially constant amount of the drain every time the storage amount of the drain reaches a predetermined amount."
In each of the above, a substantially constant amount of the drain is discharged each time the stored amount of the drain reaches the predetermined amount, but the neutralizing agent and the drain are disposed between the discharge and the next discharge. To neutralize.

[0014]

As described above, according to the first aspect of the present invention, the weight loss per unit time between the start of use and the disappearance of the neutralizer is less than that of the conventional block neutralizer. Since the weight becomes larger than the weight loss per unit time, a decrease in the neutralization ability with time from the start of use to the disappearance of the neutralizer can be suppressed as compared with the conventional neutralizing agent.

Therefore, it is easy to set various conditions for obtaining the ultimate pH by the neutralization reaction. In the invention of claim 3, the total surface area of the outer surface portion and the inner surface portion is larger than the total surface area of the neutralizing agent having no concave portion during the period from the start of use of the neutralizing agent to disappearance thereof, The weight loss per unit time, which is proportional to the total surface area, is greater than the weight loss per unit time of the conventional neutralizing agent. As a result, as compared with the conventional neutralizing agent, a decrease in the neutralizing ability over time from the start of use to the disappearance of the neutralizing agent is suppressed.

Therefore, it is easy to set various conditions for obtaining the ultimate pH by the neutralization reaction. According to the fourth aspect of the present invention, like the neutralizing agent of the third aspect of the present invention, the total surface area of the outer surface portion and the inner surface portion does not have the through hole during the period from the start of use to disappearance. It is larger than the total surface area of the agent, and the weight loss per unit time proportional to the total surface area is larger than the weight loss per unit time of the conventional neutralizing agent. Therefore, as compared with the conventional neutralizing agent, a decrease in the neutralizing ability with time from the start of use to the disappearance of the neutralizing agent is suppressed.

According to the fifth aspect of the present invention, since a plurality of through holes are formed in a plate shape and penetrate from the front surface to the rear surface, it is easy to set a large surface area of the inner surface portion. As a result, the total surface area at the predetermined time is further larger than the total surface area of the conventional neutralizing agent having no through-hole, and the weight loss per unit time in proportion to the total surface area is smaller than that of the conventional neutralizing agent. It is larger than the weight loss per unit time of the neutralizing agent. Therefore, as compared with the conventional neutralizing agent, a decrease with time in the neutralizing ability from the start of use to the disappearance of the neutralizing agent is further suppressed.

In the invention according to claim 6, during the period from the start of use of the neutralizing agent contained in the storage container to the disappearance of the neutralizing agent, a decrease in the weight of the neutralizing agent per unit time is suppressed. Therefore, the degree of neutralization of the drain stored in the storage container by the neutralizing agent does not easily decrease over time. According to the seventh aspect of the invention, a substantially constant amount of the drain is discharged each time the amount of stored drain reaches the predetermined amount, and the neutralizing agent and the drain are interposed between the discharge and the next discharge. However, since the neutralization ability of the drain by the neutralizing agent does not easily decrease with time, the disadvantage that the drain is discharged with insufficient neutralization is prevented.

[0019]

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 a perspective view of a neutralizing agent (2) according to Embodiment 1 of the present invention, and FIG. 2 is a comparison of neutralizing ability of the neutralizing agent (2). FIG. 3 is a perspective view of a neutralizing agent (1) as a target, and FIG. 3 is a perspective view of another neutralizing agent (10) whose neutralizing ability is compared with that of the neutralizing agent (2).

FIG. 4 shows a neutralizing agent (1), a neutralizing agent (10), and a neutralizing agent.
FIG. 5 is a graph comparing the weight change over time of each of (2), and FIG. 5 shows the decrease per unit time of each of the neutralizing agent (1), the neutralizing agent (10), and the neutralizing agent (2). It is the graph which compared the change of weight. [Regarding Configuration of Each Neutralizing Agent] * Neutralizing agent (2) * Neutralizing agent (2) is composed of a first sheet member (2a) having a square and constant thickness as shown in FIG. It consists of a second sheet member (2b). Each of the first sheet body (2a) and the second sheet body (2b) is made of an alkaline substance such as magnesium oxide or calcium carbonate, or an amphoteric metal such as aluminum, zinc or tin. The sheet member (2a) and the second sheet member (2b) have the same dimensions and the same weight.

* Neutralizing agent (1) * As shown in FIG. 2, the neutralizing agent (1) is formed in a cubic shape, and is made of the same substance as the neutralizing agent (2). * Neutralizing agent (10) * As shown in Fig. 3, the neutralizing agent (10) is formed in a spherical shape and is made of the same substance as the neutralizing agent (2).

[Comparison of Neutralizing Ability] For each of the neutralizing agents (2), (1) and (10) described above, a change in weight when placed in an acidic (about pH 3) drain, and The change in weight loss per unit time will be described based on numerical calculations. In this numerical calculation, the following assumption is made.

[0023] The weight loss per unit time of the neutralizing agent is proportional to the size of the surface area in contact with the drain. The proportional constant is set to “K”, and K = 0.05 for convenience of calculation. . The density of the neutralizing agent is set to “1” for convenience of calculation. . The weight loss per unit time of the neutralizing agent does not increase beyond a predetermined value. That is, since the neutralizing agent does not elute when the neutralization reaction is completed, there is an upper limit on the elution rate of the neutralizing agent. The upper limit of the weight loss of the neutralizing agent per unit time is indicated by the level A line in FIG.

[0024] The decrease in the weight of the neutralizing agent proceeds at the same speed in any of the X, Y, and Z directions of the three-dimensional coordinates. * Calculation of weight change of neutralizing agent (1) * With the cubic neutralizing agent (1) in FIG. A = W ^1/3 ··· Equation (C ₁ ) S = 6A ² ··· Equation (C ₂ ) = 6W ^2/3 ··· Equation (C ₃ ) W _s = 6 KW ^2/3 ··· Equation (C ₄ ) W _t = W−6 KW ^2/3 Equation (C ₅ ) W: Weight of the neutralizing agent (1) before unit time A: Length of one side of the neutralizing agent (1) S : surface area W _s of the neutralizing agent (1): decreased weight W _t per unit of neutralizing agent (1) time: as in weight above after the unit time of the neutralizing agent (1), neutralizing agents ( The length “A” of one side of ₁ ) is represented by the formula (C ₁ ) using the weight “W” of the neutralizing agent (1). Then, the surface area “S” of the neutralizing agent (1) is also calculated by the equation (C ₁ ) (C
It is expressed using the weight “W” as in the equation (C ₃ ) derived from ₂ ). Furthermore, the weight loss per unit time “W _S ”
Is expressed as Expression (C ₄ ) using the weight “W” and the above-described proportional constant “K”. Further, since the weight “W _t ” after the elapse of the unit time is the difference between the weight “W” and the reduced weight “W _S ”, the weight “W” and the proportionality constant “K” are used to calculate the equation (C).
₅ ).

The initial weight of the neutralizing agent (1) is set to 1 for convenience.
00 grams, and W = 100 and K = in equations (C ₄ ) and (C ₅ ).
0.05, and the weight loss per unit time "W
_S ”and the weight“ W _t ”after the elapse of the unit time are calculated. Subsequently, with the calculated “W _t ” as “W”, “W _S ” and “W _t ” in the next unit time are calculated. Further subsequently, the calculated the "W _t" as the "W", it calculates the "W _S" and "W _t" in the next unit time. This calculation is
Repeat until “W _t ” becomes “0” or less.

[0026] The above and the decrease in weight per weight "W _t" and the unit time per unit time has elapsed by calculation "W _S" is required. When representing the relationship between the elapsed time and the value of "W _t" in the graph, look like the curve in FIG. 4 (L _1), "W _S"
When the relationship between the value of E and the elapsed time is represented in a graph, the curve in FIG.
(L ₄ ). * Calculation of weight change of neutralizing agent (10) * The following formula is established for the spherical neutralizing agent (10) in FIG. R = {3W / (4π) } 1/3 ··· Equation ^{_{(C 6) S = 4πR 2}} ··· Equation _{(C 7) = 4π {3W} / (4π)} 2/3 ··· formula (C ₈ ) W _s = 4πK ｛3W / (4π)｝ ^2/3 Equation (C ₉ ) W _t = W-4πK ｛3W / (4π)｝ ^2/3 Equation (C ₁₀ ) W: weight unit time before the neutralizer (10) R: radius S of the neutralizer (10): surface area W _s of the neutralizer (10): decrease per unit of time neutralizer (10) weight W _t : Weight of the neutralizing agent (10) after a lapse of unit time As described above, the radius “R” of the neutralizing agent (10) is equal to the neutralizing agent (10).
Is expressed as in equation (C ₆ ) using the weight “W” of Then, the surface area “S” of the neutralizing agent (10) is also expressed using the weight “W” as in the equation (C ₈ ) derived from the equations (C ₆ ) and (C ₇ ). Further, using the weight “W” and the proportionality constant “K”, the reduced weight per unit time “W _S ” is expressed as in equation (C ₉ ), and the weight “W _t ” after the elapse of the unit time is , And is represented by the following equation (C ₁₀ ).

Then, in the equations (C ₉ ) and (C ₁₀ ), W = 100,
Substituting K = 0.05, the reduced weight per unit time of the neutralizing agent (10) “W _S ” and the weight after the elapse of the unit time “W
_t ”is calculated. Subsequently, similarly to the above, the calculated “W _t ” is set to “W”, and “W _S ” and “W _t ” in the next unit time are calculated. This calculation is based on the assumption that "W _t " is "0".
Repeat until:

According to the above calculation, “W
_t ”and“ W _S ”are required. When the relationship between the value of “W _t ” and the elapsed time is represented in a graph, the curve (L ₂ ) in FIG.
When the relationship between the value of “W _S ” and the elapsed time is represented in a graph, the curve (L ₅ ) in FIG. 5 is obtained. * Formula for calculating the change in weight of the neutralizing agent (2) * With the sheet-like neutralizing agent (2) in FIG. W = 2TA ² ··· Equation ^{_{(C 11) S = 4A 2}} + 8TA ··· Equation _{(C 12) W s = 4K} (A 2 + 2TA) ··· formula _{(C 13) W t = 2TA} 2 -4K ( A ² + 2TA) Formula (C ₁₄ ) W _t = 2 (TD) (AD) ² Formula (C ₁₅ ) W: Weight of the neutralizing agent (2) before unit time A : Length of one side of a square on one side of each of the first sheet member (2a) and the second sheet member (2b) T: Thickness of each of the first sheet member (2a) and the second sheet member (2b) S: surface area of the neutralizing agent (2) W _s : reduced weight of the neutralizing agent (2) per unit time W _t : weight of the neutralizing agent (2) after a lapse of unit time D: first sheet body (2a) ) And the amount of decrease in the length and thickness of each side of the second sheet member (2b) after the unit time has elapsed. As described above, the weight “W” of the neutralizing agent (2) is the length “A”. ", and, by using the thickness" T "is expressed as equation (C ₁₁₎ Further, the surface area "S" of the neutralizer (2) is similarly represented as Formula (C _12). Then, the weight loss per unit time “W _S ” is expressed by the following equation (C ₁₃ ) using the proportional constant “K”, the length “A”, and the thickness “T”. From this equation (C ₁₃ ), the weight “W _t ” after the elapse of the unit time is derived as in equation (C ₁₄ ). Further, the weight “W _t ” after the elapse of the unit time is represented by the formula (C ₁₅ ) using the decrease amount “D”.

[0029] Then, first sheet (2a) and the second sheet element each having a thickness of (2b) and 1 mm, in formula (C _11), W =
By substituting 100 and T = 1.0, the value of the length “A” is obtained, and these values of “W”, “T” and “A” are expressed by the following equations.
(C ₁₃ ) and (C ₁₄ ), and the weight loss per unit time “W
_S ”and the weight“ W _t ”after the elapse of the unit time are calculated.

Subsequently, the calculated value of “W _t ”, the respective values of “T” and “A”, and the value of “K” (=
0.05) is substituted into the equation (C ₁₅ ) to determine the reduction amount “D”. Then, formula (C ₁₃₎ to the "A" (C _14), "A-D"
By substituting the value of “T” and the value of “T−D” into “T”, “W _S ” and “W _t ” are obtained. This calculation is repeated until “W _t ” becomes “0” or less.

By the above calculation, “W _t ” for each elapsed time
And the value of “W _S ”. When the relationship between the value of “W _t ” and the elapsed time is represented in a graph, the curve (L ₃ ) in FIG.
When the relationship between the value of “W _S ” and the elapsed time is represented on a graph, the curve (L ₆ ) in FIG. 5 is obtained. *Neutralizer
Comparison of neutralizing ability of (2), neutralizing agent (1) and neutralizing agent (10) * Figure 4
As shown in the graph, the neutralizer (2) (curve (L ₁ )) and the neutralizer ( ₂ ) (curve (L ₂ )) ₃ )) changes in weight with almost the same degree of reduction from the start of use to disappearance.

As shown in the graph of FIG.
The weight loss (curve (L ₆ )) per unit time in (2) is the neutralizing agent during most of the period from the start of use to disappearance.
Decrease the weight of (1) (curve (L _4)), and it can be seen that becomes much larger than the decrease the weight of the neutralizing agent (10) (curve (L _5)). In other words, the neutralizing ability of the neutralizing agent (1) and the neutralizing agent (10) gradually decreases as they are consumed, whereas the neutralizing ability of the neutralizing agent (2) almost decreases. do not do. Therefore, it is easy to set various conditions for reaching a predetermined pH by neutralization.

When the weight loss of the neutralizing agent per unit time falls below the level B shown in FIG. 5, the pH reached by the neutralization reaction is within an allowable range (eg, pH 5.7 to pH 8.7).
, It is determined that the life of the neutralizing agent is reached when the level falls below the level B. Therefore, the neutralizing agent (2) is
Compared to (1) and neutralizing agent (10), the life is slower,
The number of replacements of the neutralizing agent (2) is reduced.

Each of the first sheet member (2a) and the second sheet member (2b) has a thickness (T) with respect to the length of a cross section cut in the thickness direction (corresponding to A in FIG. 1). When the ratio was less than 1/5, the effect of suppressing the decrease in the neutralization ability was good. The first sheet (2a) and the second sheet (2
b) are independent of each other, so that the degree of freedom in the arrangement of the first sheet member (2a) and the second sheet member (2b) is improved.
Further, the first sheet member (2a) and the second sheet member (2b) may be arranged in an opposed state with a substantially constant gap therebetween, or may be in a state where they are not opposed to each other, for example, a state where they are perpendicular to each other. .

The neutralizing agent (2) may be only the first sheet (2a). In this case, each of the mathematical expressions (C ₁₁ ) to (C ₁₅ ) is numerically calculated in the same manner as above using each of the mathematical expressions obtained by dividing the right term by “2”, and the relationship between “W _t ” and the elapsed time is calculated. , and, "W _S"
When the relationship between and the elapsed time is represented in a graph, as in the above,
It can be seen that the neutralizing ability hardly decreases during most of the period from the start of use to consumption.

Further, the neutralizing agent may be used in the condensing type boiler described above. That is, the boiler has a storage container (not shown) for storing the generated drain,
And a neutralizing agent for neutralizing the stored drain stored in the storage container. The storage container and the neutralizing agent correspond to the “neutralizing device” described in claim 6.

As the storage container, for example, one that discharges a substantially constant amount of drain every time the amount of stored drain reaches a predetermined amount, such as a siphon type as shown in FIG. 11, can be adopted. Further, the drain may be discharged by overflow. When a neutralizing agent is stored in the siphon-type storage container, the neutralizing agent and the drain undergo a neutralization reaction between the discharge and the next discharge. When the neutralizing agent is the above-described neutralizing agent (2), the decrease in weight per unit time is suppressed, so that a limited time is required between the discharge and the next discharge. And the drain can be prevented from being discharged without being neutralized.

The first sheet member (2a) and the second sheet member (2a)
Each of b) may be arranged along the flow of the drain in the storage container. In this case, the flow of the drain is not hindered by the first sheet member (2a) and the second sheet member (2b). [Embodiment 2] Fig. 6 is a perspective view of a neutralizing agent (2) according to Embodiment 2 of the present invention.

In the first embodiment, the first sheet (2a) and the second sheet (2b) constituting the neutralizing agent (2) are independent of each other. May be adopted. In the figure, one end of each of the first sheet member (2a) and the second sheet member (2b) is integrated by a connecting piece (2c). Even in this case, since the neutralizing agent (2) has the first sheet body (2a) and the second sheet body (2b), the unit of the neutralizing agent (2) is required between the start of use and the disappearance of the sheet. The weight loss per hour is much larger than the weight loss of the neutralizing agent (1) and the neutralizing agent (10), so that the deterioration of the neutralizing ability with time is suppressed.

The neutralizing agent (2) may have a structure having three or more sheet-shaped portions. The shape is not limited to a square as long as the sheet shape is used, and may be, for example, a rectangle, a circle, an ellipse, or the like. Third Embodiment FIG. 7 is a perspective view of a neutralizing agent (4) according to a third embodiment of the present invention. FIG. 8 shows a neutralizing agent (1) and a neutralizing agent.
FIG. 9 is a graph comparing the weight change of each of the neutralizer (10) and the neutralizer (4) with time, and FIG. 9 shows the results of the neutralizer (1), the neutralizer (10), and the neutralizer (4). It is the graph which compared the change of the weight loss per each unit time.

[Constitution of Each Neutralizing Agent] * Neutralizing agent (4) * The neutralizing agent (4) is formed in a cube as shown in FIG. It has a configuration having a rectangular column-shaped through hole (41) penetrating in the center. Each of the constituent sides of the cross section of the through hole (41) is parallel to each of the outer constituent sides of the neutralizing agent (4) in plan view.

With respect to the neutralizing agent (4), the neutralizing agents (1) and (10) of the first embodiment are compared with each other for the neutralizing ability. The neutralizing agent (4) is composed of the neutralizing agent (1) and the neutralizing agent.
It is composed of the same substance as (10). [Comparison of Neutralization Ability] As in Embodiment 1, the change in weight of the neutralizing agent (4) placed in the drain and the change in weight loss per unit time are calculated based on numerical calculations. Will be explained. In this numerical calculation, it is assumed in the same manner as in the first embodiment. The upper limit of the weight loss of the neutralizing agent per unit time is indicated by the level A line in FIG.

* Calculation of Weight Change of Neutralizing Agent (4) * The following equation holds for the neutralizing agent (4). W = A ³ −AH ² Formula (C ₁₆ ) S = 6A ² + 4HA-2H ² Formula (C ₁₇ ) W _s = K (6A ² + 4HA-2H ² ) Formula (C ₁₈ ) ) W _t = (A ³ −AH ² ) −K (6A ² + 4HA−2H ² ) Formula (C ₁₉ ) W _t = (A−D) ³ − (A−D) (H + D) ^2. Formula (C ₂₀ ) W: Weight of neutralizing agent (4) before unit time A: Length of one side of neutralizing agent (4) H: Cross section of through hole (41) of neutralizing agent (4) the length of one side S: total surface area W _s of the neutralizing agent (4): neutralizer (4) reducing the weight W per unit time _t: weight after unit time neutralizer (4) D: medium Amount of decrease of "A" after unit time of summing agent (4) As described above, the weight "W" of the neutralizing agent (4) uses the length "A" and the length "H". Thus, it is expressed as in equation (C ₁₆ ). Similarly, the surface area “S” is calculated by the equation (C ₁₇ )
It is represented as Then, the weight loss per unit time “W _S ” is expressed by the following equation (C ₁₈ ) using the proportional constant “K”, the length “A”, and the length “H”. Also, the weight “W _t ” after the unit time elapses from the equations (C ₁₆ ) and (C ₁₈ ) is
(C ₁₉ ). Further, the weight “W _t ” after the elapse of the unit time is represented by the formula (C ₂₀ ) using the decrease amount “D”.

Then, in equation (C ₁₆ ), W = 100 and H =
By substituting 1.0, the value of the length “A” is obtained, and these values of “W”, “H”, and “A” are calculated by the equations (C ₁₈ ) and (C ₁₉ ).
To calculate the reduced weight per unit time “W _S ” and the weight after the unit time elapses “W _t ”. Subsequently, the calculated value of “W _t ”, “H” and “A”
And the value of “K” (= 0.05) are calculated using the formula (C
₂₀ ) to determine the amount of decrease "D" of the length "A" in the unit time. This decrease amount “D” is the same as the increase amount of the length “T” in the unit time. And
Substituting the value of “AD” for “A” in equations (C ₁₈ ) and (C ₁₉ ),
By substituting the value of “H + D” for “H”,
“W _S ” and “W _t ” are obtained. This calculation is referred to as “W _t
Is repeated until “0” or less.

When the relationship between the value of “W _t ” obtained by the above calculation and the elapsed time is represented in a graph, a curve (L ₇ ) in FIG.
become that way. When the relationship between the value of “W _S ” obtained by the calculation and the elapsed time is represented in a graph, the curve (L ₈ ) in FIG.
become that way. Incidentally, the curves (L ₁ ) and (L ₄ ) represent the change of the neutralizing agent (1) as in the first embodiment, and the curves (L ₂ ) and (L ₄ )
₅ ) shows the change of the neutralizing agent (10) as in the first embodiment.

* Comparison of neutralizing ability of neutralizing agent (4), neutralizing agent (1) and neutralizing agent (10) * As shown in the graph of FIG. 8, neutralizing agent (1) (curve (L ₁ )),
And neutralizing agent (4) compared to neutralizing agent (10) (curve (L ₂ ))
(Curve (L ₇ )) shows that the weight changes with substantially the same degree of decrease from the start of use to disappearance. Further, as shown in the graph of FIG. 9, the weight loss (curve (L ₈ )) of the neutralizing agent (4) per unit time was almost equal to the neutralizing agent (1 )) (Curve (L ₄ )) and the reduced weight (curve (L ₅ )) of the neutralizing agent (10). This is because the total surface area of the surface area of the outer surface of the neutralizing agent (4) and the surface area of the inner surface of the through hole (41) is equal to the surface area of the neutralizing agent (1) having no through hole (41). This is because the weight loss per unit time is proportional to the total surface area.

Therefore, the neutralizing ability of the neutralizing agent (4) hardly decreases during most of the period until the disappearance. On the contrary,
The neutralizing ability of the neutralizing agent (1) and the neutralizing agent (10) gradually decreases immediately after the start of use. Further, since the decrease in the neutralization ability is suppressed, it is easy to set various conditions for reaching a predetermined pH by neutralization.

Further, a siphon type storage container (not shown)
Even when used while being stored in a container, since the weight loss per unit time hardly decreases, it can be sufficiently neutralized within a limited time until the drain is discharged, and the drain is not neutralized. The inconvenience of being discharged to the air is prevented. When the weight loss per unit time falls below the level B shown in FIG. 9, the pH reached by the neutralization reaction is out of the allowable range. However, the neutralizing agent (4)
Life expectancy is slower than (1) and neutralizer (10).
Therefore, the number of replacements of the neutralizing agent (4) can be reduced.

Further, since the neutralizing agent (4) has a through-hole (41), it is recessed from a predetermined surface of the neutralizing agent (4) and compared with the neutralizing agent (4) which does not penetrate the neutralizing agent (4). Therefore, it is easy to set the surface area of the inner surface portion large. Accordingly, the amount of increase in the surface area of the inner surface portion due to use is increased, and the time-dependent decrease in the neutralization ability is further suppressed. Also, this neutralizer
(4) may be configured to have a concave portion that does not penetrate.
Even in this case, the weight loss per unit time
The weight is much larger than the reduced weight of (1), and a decrease in the neutralizing ability with time is suppressed. Fourth Embodiment FIG. 10 is a perspective view of a neutralizing agent (5) according to a fourth embodiment of the present invention.

The neutralizing agent (5) according to the fourth embodiment is formed in a plate shape having a square shape and a constant thickness, and a plurality of holes (51) () having a circular cross section penetrating from the front surface to the rear surface. 51). Even in this neutralizing agent (5), the total surface area of the surface area of the outer surface portion and the surface area of the inner surface portion of the pores (51) and (51) in the period from the start of use to disappearance is It becomes larger than the surface area of the neutralizing agent having no holes (51) (51). Therefore, in the neutralizing agent (5), the weight loss per unit time in proportion to the total surface area is reduced by the pores (51) and (51).
And the weight of the plate-like neutralizing agent having no is increased, and the time-dependent decrease in the neutralizing ability is suppressed.

Since a plurality of holes (51) and (51) are provided, the surface area of the inner surface is larger than that having one hole (51). Therefore, during the period from the start of use to the disappearance, the total surface area further increases, and the time-dependent decrease in the neutralization ability is further suppressed. In addition, since the neutralizing agent (5) is formed in a plate shape, a decrease in the neutralizing ability with time is also suppressed in this respect.

In the third embodiment, a cubic neutralizing agent is used, and in the fourth embodiment, a plate-shaped neutralizing agent is used. The shape is not limited to the above, and may be spherical, for example.

[Brief description of the drawings]

FIG. 1 is a perspective view of a neutralizing agent (2) according to Embodiment 1 of the present invention.

FIG. 2 is a perspective view of a neutralizing agent (1) whose neutralizing ability is compared with that of the neutralizing agent (2).

FIG. 3 is a perspective view of another neutralizing agent (10) whose neutralizing ability is compared with that of the neutralizing agent (2).

FIG. 4 is a graph comparing the time-dependent weight changes of the neutralizing agent (1), the neutralizing agent (10), and the neutralizing agent (2).

FIG. 5 is a graph comparing the change in weight loss per unit time of each of the neutralizing agent (1), the neutralizing agent (10), and the neutralizing agent (2).

FIG. 6 is a perspective view of a neutralizing agent (2) according to Embodiment 2 of the present invention.

FIG. 7 is a perspective view of a neutralizing agent (4) according to Embodiment 3 of the present invention.

FIG. 8 is a graph comparing the time-dependent weight changes of the neutralizing agent (1), the neutralizing agent (10), and the neutralizing agent (4).

FIG. 9 is a graph comparing the change in weight loss per unit time of each of the neutralizing agent (1), the neutralizing agent (10), and the neutralizing agent (4).

FIG. 10 shows a neutralizing agent (5) according to the fourth embodiment of the present invention.
Perspective view of

FIG. 11 is a sectional view of the storage container (8).

FIG. 12 is a front view of a conventional neutralizing agent (9a).

FIG. 13 is a perspective view of another conventional neutralizing agent (9b).

[Explanation of symbols]

 (2) ... Neutralizing agent (2a) ... First sheet (2b) ... Second sheet (2c) ... Connecting piece

Claims (7)

[Claims] 1. A neutralizing agent having a sheet shape. 2. The neutralizing agent according to claim 1, wherein a ratio of a thickness of the sheet to a length of a cross section cut in a thickness direction is smaller than 1/5. 3. A neutralizing agent having a concave portion on the surface. 4. A neutralizing agent having a through-hole. 5. The neutralizing agent according to claim 4, wherein the neutralizing agent is formed in a plate shape and the plurality of through holes penetrate from the front surface to the back surface. 6. A neutralization device provided in a combustion device that generates drain, wherein the storage container stores the drain, and neutralizes the stored drain that is stored in the storage container. And a neutralizing agent according to any one of claims 1 to 5. 7. The neutralization device according to claim 6, wherein the storage container discharges a substantially constant amount of the drain every time the storage amount of the drain reaches a predetermined amount.