JPS597916B2 - total heat exchanger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a total heat exchanger in which a harmful gas remover is disposed on the heat exchange surface in contact with the empty stream passing through the total heat exchanger, and removes harmful gases such as NOX, SO2, H2S, etc. that are harmful to the human body. The purpose is to prevent harmful gases from entering indoors.

In addition to removing harmful gases, the present invention also aims to prevent various foul-smelling gases caused by unsaturated compounds from entering the room.

The object of the present invention is to use a material that has undergone harmful gas removal as a spacing regulating member for heat exchange plates.

Conventionally, a filter has been used to purify the air flow passing through a total heat exchanger. However, it has been impossible to remove gaseous harmful substances such as NOx using a simple filter alone. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In FIG. 1, a heat exchanger 1 has an inner cylinder 2 and an outer cylinder 3, and the space between the two cylinders is divided into a plurality of chambers by a heat exchange plate 4 that partitions the cylinder in the radial direction.

The heat exchange plate 4 is made of a material having an appropriate temperature, such as paper. FIG. 1 shows a portion of a plurality of rooms. The heat exchange plate 4 is, for example, ABCD, A'B'C! D'
, A″B″C″D″. ABCD
In a chamber partitioned by heat exchange plates 4 of A'B'C'D' and heat exchange plates 4 of A'B'C'D', a closed fan-shaped portion 5 formed by CDD'C' is closed, and the other end is closed. The open fan-shaped portion 6 formed at ABB'A' is in an open state. Further, the opening 7 opens in the circumferential direction in the vicinity of the closed fan-shaped portion 5 of the chamber. A closed sector section 8 formed by A'B'BIAI is located in a chamber partitioned by a heat exchange plate 4 named A'B'σDf and a heat exchange plate 4 named AIB''C''DI.
is in a closed state, and the open fan-shaped portion 9 formed by σD'D/'CI at the other end is in an open state.

Further, the opening 10 is located in the vicinity of the closed fan-shaped portion 8 of the chamber and opens in the circumferential direction. In FIG. 2, the heat exchanger 1 is installed in the wall 11 and the opening 10 is in the room 1.
2. The opening 7 is formed so as to be located outside the room 13.

In FIG. 3, reference numeral 14 indicates a noxious gas removed q, which is attached to the surface of the heat exchange plate 4.

The components of the harmful gas remover are chlorite (NaClO2 or KClO2), calcium hydroxide, and calcium sulfate.As shown in FIG. As shown in FIG. 6, it is arranged so as to be in contact with the flow in both directions A and B.

As shown in FIG. 8, the harmful gas remover 14 is arranged so as to set the interval between the heat exchange plates 4. Next, the effect will be explained. In Figure 1, the flow a flowing in from the opening 7
passes through a chamber divided by heat exchange plates ABCD, A'B'C'D' and flows out to the opening fan-shaped section 6? (The fan is not shown), and the flow b flowing in from the opening 10 passes through a chamber partitioned by the heat exchange plates A5B'C'D' and AIBICIDI, and flows out from the opening fan-shaped part 9.

(The fan is not shown) As shown in Figure 2, the flow a
Flow b is the flow of air from the outside 13 flowing into the room 12, and flow b is the flow of air from the room 12 flowing out to the outside 13.

At this time, a heat exchange plate 4 indicated by A'BfC5D' in FIG. cause During the summer, from a to b during indoor cooling, during the winter,
During indoor heating, heat transfers from b to a. Therefore, ventilation can be performed without increasing the load on indoor heating and cooling equipment. At this time, since the harmful gas removing agent 14 is arranged on the heat exchange plate 4 as shown in FIG.
Now, it is removed by the reaction shown below.

That is, even if the air from the outdoor 13 shown by flow a in FIG. 2 contains NOx due to automobile exhaust gas, etc., the air sent into the indoor 12 will be free of NOx due to the action of the harmful gas remover. It will be free of contaminants.

Furthermore, even if the air from the indoor 12 shown in flow b is mixed with NOx due to combustion gas, etc., the air sent to the outdoor 13 is assumed to be free of NOx due to the action of the harmful gas remover. Become.

In FIG. 5, the harmful gas removing agent 14 disposed through the heat exchange plate 4 has strong hygroscopicity as can be seen from the fact that it uses water vapor in the air to carry out the reaction. As shown in FIG. 6, the harmful gas remover 14 absorbs NOx contained in flows A and B, and also absorbs moisture from the high temperature and high humidity flow and releases it to the low temperature and low humidity side. The idea is to increase the efficiency of latent heat exchange by imparting the latent heat of condensation generated during absorption to the atmosphere at a lower temperature and humidity. In FIG. 7, the harmful gas remover 14 placed on the heat exchange plates 4 is arranged so as to set the interval between the heat exchange plates 4, as shown in FIG. Even if the flow occurs, the mutual position of the heat exchange plates 4 will not be deformed due to the flow. By adding a harmful gas remover, it is possible to introduce fresh air from which NOx contained in automobile exhaust gas, etc. has been removed, and NOx caused by combustion indoors is not discharged outdoors.

In addition, the addition of the harmful gas remover causes undulations on the surface of the heat exchange plate, which increases the turbulence of the passing airflow, resulting in a decrease in heat exchange efficiency and due to the hygroscopic function of the harmful gas remover. ．． The exchange of latent heat is facilitated and the heat exchange efficiency is improved.

Furthermore, when the harmful gas remover is used at the same time to set the spacing between the heat exchange plates, the heat exchange plates are not deformed and the heat exchange operation is performed reliably.

As described above, for the composition of alkali metal chlorite, calcium sulfate, and calcium hydroxide, the reaction proceeds according to the formula for NOx and SO2 removal reaction, and the reaction rate is faster than the NOx removal reaction.

The operating conditions for NOx removal are: space velocity SV = 50,000 (h-1) for NOx at the environmental concentration level;
S
In the case of O2, the space velocity SV = 100,000 (h-1
), a removal rate of 100 (!l) can be obtained. On the other hand, since this system uses NaClO2 or KClO2, it has deodorizing performance based on its oxidizing power. triethylamine,
It is particularly effective against malodorous substances such as methyl mercaptan.

The NaClO2 (KClO2) system has the best NOx removal ability and granulation properties, but there are also KMnO4Na2S2
O3, Na2SO3. Compositions based on CO(NH2)2 and the like are effective.

The reaction between them and NOx is as follows. These reactions 1 to 4 and the above NaClO2-based reaction are all liquid phase reactions, but when an alkali and a cement agent (which is defined as a hydraulic substance) are added to these base materials, When kneaded and granulated, the granulated product exhibits unique active reactivity.

The reason is that NaClO2, KMnO4,...CO(N
H2) 2 etc. have very high solubility in water (50
~709%/100qH20), whereas the cement agent hardly dissolves. Therefore, during the granulation operation, water (in some cases, addition of alcohol is effective) is added to the cement in an amount exceeding the hydration equivalent, and during hardening and drying, water is absorbed from the inside of the fine particles constituting the composition. As they move through the gap by capillary action, collect on the surface and evaporate from there, these easily water-soluble substances collect on the surface and recrystallize there as they dry. The reason for this is thought to be that a large amount of reactants gather on the surface, increasing the reactivity (activity) of the surface during reaction operations. 3 in the system of 1 to 4
, 4 system has a slightly slow reaction rate.

In terms of practical aspects such as granulation properties, NaClO2 or KClO2
The system composition has the best performance and is excellent.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a total heat exchanger according to an embodiment of the present invention, FIG. 2 is a sectional view showing an example of use of the total heat exchanger, FIG. 3 is a plan view of a heat exchange plate, and FIG. The figure is an explanatory diagram showing the arrangement of the heat exchange plates, FIG. 5 is a plan view showing the second embodiment of the heat exchange plate, and FIG. 6 is an explanatory diagram showing the arrangement of the heat exchange plates in FIG. 5.
FIG. 7 is a plan view showing a third embodiment of the heat exchange plate, and FIG. 8 is an explanatory diagram showing the arrangement of the heat exchange plates in FIG. 1...Heat exchanger, 2...Inner cylinder, 3...
...Outer cylinder, 4...Heat exchange plate, 5...
・Closed fan-shaped part, 6... Open fan-shaped part, 7...
・・Opening portion, 8・・Closing fan-shaped portion, 9・・・・
・Opening fan-shaped part, 10...Opening part, 11...
...Wall, 12...Indoor, 13...Outdoor, 14...Harmful gas remover.

Claims (1)

[Scope of Claims] 1. A mechanism is provided that alternately forms countercurrents and performs total heat exchange using heat exchange plates between the countercurrents, and the heat exchange plates are made of a hygroscopic material such as paper, and A total heat exchanger characterized in that the heat exchange plate has a structure in which a harmful gas removal agent is attached. 2. The harmful gas remover is made by mixing one or more selected from the group of alkali metal chlorites, permanganates, sulfites, thiosulfates, or urea with water and an alkali and cement material. 2. The total heat exchanger according to claim 1, wherein a harmful gas removing agent formed into granules is added to the surface of the heat exchange plate. 3. The total heat exchanger according to claim 1, wherein the harmful gas removing agent is composed of an alkali metal chlorite, calcium hydroxide, and calcium sulfate. 4. The total heat exchanger according to claim 1, characterized in that the harmful gas removing agent is disposed in holes opened in the heat exchange plate and comes into contact with countercurrents on both sides of the exchange plate. 5. The total heat exchanger according to claim 1, characterized in that the harmful gas removing agent is arranged to define the interval between the heat exchange plates.