JPH0136020B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a device for neutralizing acidic condensed water generated during heat exchange in oil water heaters, gas water heaters, etc., and weakly acidic water such as well water. It is something.

Conventional configurations and their problems This year, from the perspective of energy conservation, highly efficient combustion equipment such as oil water heaters and gas water heaters is required, and latent heat type heat exchangers that recover latent heat contained in combustion gas are required. combustion equipment has been developed.

However, the carbon dioxide and nitrogen oxides in the combustion gas dissolve in the condensed water that forms on the surface of this latent heat type heat exchanger, forming acidic condensed water. If this acidic condensed water is discharged as it is, it may corrode the pipes. Because of problems such as melting of concrete, a neutralization treatment device that chemically neutralizes it has become necessary.

Conventionally, this type of acidic condensation water neutralization treatment equipment was the first
As shown in the figure, a plurality of processing tanks 3 in which a neutralizing agent 2 made of a cylindrical basic substance is arranged are arranged in series in several stages in a main body 1, and acidic condensed water is processed from an inlet 4. It flows into the tank 3, sequentially flows downstream while coming into contact with the neutralizing agent 2, is neutralized, and is discharged from the outlet 5 to the outside of the main body 1.

The first problem with the apparatus for neutralizing acidic condensed water constructed in this manner is that the neutralization ability varies depending on the flow direction of the acidic condensed water.

In other words, if the balance between the surface tension and its own weight of acidic condensed water is disrupted at the dam of the treatment tank 3, it will rapidly flow into the next treatment tank 3. Since flow occurs and the solution is discharged without sufficient reaction time, it has the disadvantage that it is discharged from the outlet 5 in a highly acidic state.

The second problem is that when installed in an oil water heater or gas water heater, etc., the latent heat type heat exchanger becomes clogged due to insoluble foreign matter such as corrosion main components and airborne dust. It is a decline in ability. This is because the cylindrical neutralizer 2 is in line contact with the bottom of the processing tank 3 and in direct contact with both side walls of the main body 1, so insoluble foreign substances contained in the acidic condensation water are absorbed by the neutralizer 2 and the main body 1.
It accumulates on the side wall or in the contact area with the bottom surface of the processing tank 3, causing clogging, which is a factor that reduces the neutralization ability.

The third problem is that since the processing tank 3 in which the neutralizing agent 2 is placed is fixed to the main body 1 with an adhesive, it is vulnerable to freezing and pressure resistance. Therefore, if a predetermined amount of acidic condensed water flows into the processing tank 3, water may leak from the adhesive part between the main body 1 and the processing tank 3, or if the condensed water freezes, the main body 1 and the processing tank 3 will separate, causing the water to leak. It had the drawback of leaking.

OBJECTS OF THE INVENTION It is an object of the present invention to provide a neutralization treatment device in which the above-mentioned conventional problems are solved.

Structure of the Invention The present invention consists of a lid having an inlet and a box having an outlet, and a processing tank is formed by partition plates and guide plates provided on both side walls of the box,
A basic substance is detachably provided in the side wall and bottom of the treatment tank with a gap, and the partition plate and the box body are integrally molded. With this structure, acidic water can be transferred to the treatment tank. A flow overflows from the treatment tank via the lower part of the guide plate provided.

DESCRIPTION OF EXAMPLES The present invention will be described below using examples. Second
The figure is a vertical cross-sectional view of a neutralization treatment apparatus that is an embodiment of the present invention. The weakly acidic water flowing in from the inlet 6 precipitates insoluble compounds in the precipitation tank 7, overflows from the partition plate 8, and flows into the processing tank 10 via the lower part of the guide plate 9. The processing tank 10 stores a basic substance 11 which is removably provided with space on the side wall and bottom, and after the weakly acidic water reacts with the basic substance 11, it overflows from the partition plate 8'. It exits and flows into the next processing tank 10'. Thereafter, the water that has been completely neutralized by reacting with the basic substance 11' overflows from the partition plate 8'' and flows out from the outlet 1.
It flows out from 2. The processing tank 10 is formed by a guide plate 9 and a partition plate 8', the processing tank 10' is formed by a guide plate 9' and a partition plate 8'', and the partition plates 8, 8', 8'' and the box body 13 are integrally molded. There is. The guide plates 9, 9' are installed on both side walls of the box body 13 with adhesive, and have a vertical length so that acidic water passes through the lower part of the guide plates 9, 9'. I'm making adjustments.

A lid 15 having a discharge hole 14 and an inlet 6 is provided on the box 13. In addition, information board 9,
There is a space between 9' and the lid 15, which is used as a bypass flow path 16.

In order to provide a space between the basic substance 11, 11' and the bottom of the processing tank 10, 10', the processing tank 10,
Protrusions 17, 17', 17''... are provided at the bottom of 10',
Similarly, air permeable corrugated separators 18, 18' are provided to provide space between the side walls. Holes 19 and separators 18, 18' were provided to provide ventilation.

FIG. 3 is a sectional view taken along line AA' in FIG. 2.

Basic substances include magnesium or magnesium alloys, calcium or calcium alloys, basic refractories, basic minerals, basic glasses, basic buffers with pH adjustment ability, hydroxides and carbonates of alkali metals or alkaline earth metals. , oxides, etc., and these are used in solid forms such as lumps, granules, powders, thin plates, pipes, etc.

In addition, the neutralization treatment device is manufactured using plastic, and acrylic resin, ABS resin, vinyl chloride resin, and AS resin are optimal.

The separator is made of plastic or chemical fiber of the above-mentioned material and has flowability. Particularly granular,
It is best to use basic substances such as powdered substances by filling them into a bag made of chemical fiber. Chemical fibers include acrylic fibers,
Materials such as polypropylene fiber, nylon, rayon, vinyl chloride, polyester, and vinylon are most suitable.

The effects of this example were evaluated using a neutralization treatment apparatus (H 95 x L 192 x D 440 mm) shown in FIGS. 2 and 3. As a basic substance, Mg96wt%−
A magnesium alloy of Al3wt%-Zn1wt% was optimal. This is because in the case of Mg100wt%, magnesium hydroxide generated by reaction with acidic dew water is likely to peel off, resulting in flow path blockage and clogging, whereas Mg96wt%−Al3wt
%-Zn1wt% Mg alloy is due to the fact that peeling of magnesium hydroxide is less likely to occur due to the action of aluminum and zinc, and clogging due to this is less likely to occur. On the other hand, magnesium hydroxide, a corrosion product, becomes more difficult to peel off as the amount of aluminum added increases, but the basicity of the magnesium alloy decreases and the amount of magnesium alloy required for neutralization increases. The size of the neutralization treatment equipment increases. Further, if the amount of aluminum added is large, it becomes difficult to mold, but if zinc is added, molding becomes easier, so that it can be molded into any shape of particles or plates with a large surface area, and the basicity improves.

For the above reasons, Mg96wt%−Al3wt%−
Magnesium alloy containing 1wt% Zn has an optimal composition with excellent resistance to peeling of corrosion products, basicity, and moldability, is resistant to clogging, and is effective in making neutralization treatment equipment smaller.

Eight plates (H 40 x L 60 x D 4 mm) (H 40 x L 60 x D 4 mm) of 8 pieces (133 g) of magnesium alloy (Mg96%, Al3%, Zn1%) were used as basic substances, and acidic condensed water of PH4 was used.
After neutralization, when flowing at a flow rate of 1600ml/h (water temperature 50℃)
The pH was 7.2 to 7.5, indicating sufficient neutralization. Also,
Even when water was poured into this neutralization treatment device, cooled to -10°C, and frozen, there was no abnormality, and no water leakage or damage to the container occurred. Furthermore, even when acidic dew condensation water was continuously flowed in for one year, there was little clogging due to scale, dirt, etc., and the initial neutralization performance was maintained.

On the other hand, magnesium alloy particles (4×
When about 2,000 pieces (190g) of 4x4mm) are filled in a polypropylene bag and city water with a pH of 5 is poured in at a flow rate of 10/min (24°C), the pH after neutralization is 7.1 to 7.5; , in the case of magnesium oxide, PH=
6.8, which fully satisfied the neutralization performance.

Effects of the invention 96wt of magnesium is added to the treatment tank via a separator.
% - 3 wt % aluminum - 1 wt % zinc alloy, so the peeling of magnesium hydroxide produced by reaction with acidic condensed water is less likely to occur due to the action of aluminum and zinc, and the resulting clogging is less likely to occur.

Furthermore, if the amount of aluminum added is large, it becomes difficult to mold, but if zinc is added, molding becomes easier, so that it can be molded into any desired shape of particles or plates with a large surface area, and the degree of basicity is improved.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a conventional neutralization processing device, Fig. 2 is a sectional view showing an embodiment of the neutralization processing device of the present invention, and Fig. 3 is a sectional view taken along the line A-A' in Fig. 2. be. 6... Inlet, 8, 8', 8''... Partition plate, 9,
9'...Guidance plate, 10, 10'...Processing tank, 11,
11'... Basic substance, 12... Outlet, 13...
...Box body, 15...Lid body.

Claims (1)

[Claims] 1 Consists of a lid body having an inlet and a box body having an outlet port, and partition plates and guide plates provided on both side walls of the box body, which have an inlet part on the lower side and an outlet part on the upper side. A treatment tank is formed, and a magnesium alloy of 96 wt% magnesium, 3 wt% aluminum, and 1 wt% zinc is removably arranged in the treatment tank via a separator, and the box body and the partition plate are integrally molded. Neutralization equipment for acidic water.