JPS6230598A - Neutralization apparatus for supplying water and hot water - Google Patents

Abstract

PURPOSE:To effectively perform corrosion-proof treatment, by forming a zigzag water flow passage in a treatment tank and arranging a granular basic substance in the water flow passage. CONSTITUTION:A granular basic substance 5 comprising a magnesium alloy and a granular basic substance 5' comprising sodium silicate are stored in a treatment tank 1. An upper lid 2 has an inflow port 6 and an outflow port 7 and nets 8a, 8b respectively arranged to said ports 6, 7. A bottom lid 3 has a freely detachable plug 9 and both lids 2, 3 are fixed in a freely detachable manner by using screw 10a-10d and holding rods 11a-11d and formed of a material wherein nickel or chromium plating is applied to brass while the side surface body 4 of the tank is formed of an acrylic resin. By this method, the elution of the metal of piping is suppressed and neutralizing capacity is also enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a corrosion-preventing neutralization device for use in water and hot water supply equipment using copper or galvanized steel piping.

BACKGROUND OF THE INVENTION Conventionally, copper piping and galvanized steel pipes have been used as water supply piping, but when these are used in areas with low %PH water quality, problems sometimes occur due to the elution of copper ions and zinc ions. That is, blue water in copper piping and red water in galvanized steel pipes. Blue water is the blue coloration of towels and bathtubs caused by a blue insoluble compound (fatty acid steel) produced by the reaction between eluted copper ions and fatty acids in soap, and red water is caused by iron rust caused by the disappearance of the galvanized layer. It is the red coloring of water.

Problems to be Solved by the Invention Liquid or solid polyphosphates and liquid silicates are available as rust preventive agents for preventing these water quality problems.

These rust inhibitors work to prevent corrosion by forming a protective film on the metal surface, but polyphosphates have the problem of decomposing in hot water and promoting damage, while silicates are The problem was that it took a long time to form a wave, and the suppressive effect was not immediately apparent.

On the other hand, as a device for injecting these additives into pipes,
There is a pump that continuously injects liquid products, but there is a control machine that can inject liquid in proportion to the flow rate of make-up water.
The disadvantage is that it requires complicated handling.

Means for Solving the Problem In order to solve this problem, the present invention forms a zigzag-shaped water flow path in a treatment tank having an inlet and an outlet, and the following (I) is formed in this water flow path. ) (A neutralization device for water supply, in which a large number of granular basic substances selected from the group of IQ are arranged, and a net is arranged between the granular basic substances and the inlet and the outlet. .

CI) Red sea bream, sium or magnesium alloy 0
Sodium silicate or potassium silicate action Due to this fjl formation, weakly acidic water becomes neutral to weakly alkaline water, and corrosion of pipe metals is suppressed.

In addition, the net prevents particulate basic substances from accidentally spilling out of the treatment tank during transportation of the neutralization device or from flowing out during running water, and the rectifying action of the net improves neutralization performance.

In addition, basic substances also have a long life because they have low solubility.

Example Embodiments of the present invention will be described below with reference to the drawings.

In one embodiment shown in FIGS. 1 and 2, the processing tank 1 consists of a top cover 2, a bottom cover 3, and a side body 4, and the inside of the processing tank 1 contains magnesium alloy (96% Mg, 13% A, 1 %)
granular basic substance 5 consisting of sodium silicate (st○
275% - Na 2025%) is stored. The upper lid 2 has an inlet 6 and an outlet lower, and a net 8a and a net 8b are arranged in each of the flow passages. The bottom cover 3 has a removable stopper 9, and the top cover 2, screw bodies 10a, 10b, 1oc, 1od and a retainer ta.
<11a, 11b, 11c, and 11d are used to removably fix it.

The top cover 2 and bottom cover 3 are made of brass plated with nickel and chrome, and the side body 4 is made of acrylic resin. Net 8
Stainless steel is used for a and 8b, and if necessary, a structure in which they can be attached and detached or a structure in which they are not arranged is also possible.

FIG. 3 shows another embodiment in which magnesium alloy grains 5 and sodium silicate grains 5' are separated by a flowable separator 12, with magnesium alloy grains 5 in the upper part and sodium silicate grains 5' in the lower part. There are 4 rows each.

Note that the container configuration is the same as in FIG. 1.

FIG. 4 shows another embodiment, in which granular basic material 5 made of a magnesium alloy is arranged. In addition.

The container configuration is the same as in FIG.

FIG. 5 is an example of a song. The processing tank 1 consists of a top cover 2', a bottom cover 3', and a side body 4, and a granular basic substance 5' made of sodium silicate is stored inside the processing tank 1. The bottom cover 3' has an inlet 6 and an outlet lower, and a net 8a and a net 8b are arranged in each flow path. The top lid 2' has a removable stopper 9, and the bottom lid 3' has a screw body 10.
a, 10b, 10cm10d and holding rods 11a, 11
It is removably fixed using b.11cm11d.

FIG. 6 shows another embodiment. Inlet 6 and flow 81□1
, □. 1 to 7, ゎ13□: Form a zigzag-shaped water flow path, and fill the net 8' with granular basic substance 5' made of sodium silicate: □ and store it in 1 treatment tank 1 Shihiru/neutralization device is...
It consists of a box body 14 and a lid body 15 made of stainless steel.

The box body 14 has an inlet 6 and an outlet lower on both sides, and a removable stopper 9 is provided at the bottom. On the other hand, a gap 16 is provided between the lid body 15 and the partition plate 13 so that the lid body 15 can be used as a bypass flow path. In addition, the box body 14 and the lid body 15 were fixed with screws through a gasket 17 in one day.

The mechanism of neutralization is thought to be as follows.

Magnesium reacts with hydrogen ions in water and is eluted as magnesium ions, and at the same time, hydroxide ions increase and the pH rises. Reaction Formula % Formula % Sodium silicate reacts when hydrogen ions in water and sodium ions in sodium silicate undergo ion exchange and sodium ions are eluted into water.

Hydroxide ions increase and the pH increases. Silicic acid remains〉L
The majority remains. The reaction formula is as follows.

Na25i○3+2H20-+ H2S i O3+2
The same applies to Na++20H-potassium silicate.

The effects of the embodiments of the present invention were evaluated using a water heater as shown in FIG. In FIG. 7, a water supply neutralization device 1'' is installed in a flow path (sending side) 21 connecting a hot water storage tank 19 having a hot water storage capacity of 3001 and a water side copper heat exchanger 2o. The operation will be explained. The conveyed refrigerant, which has become a low-temperature, low-pressure gas by receiving and receiving solar heat on the heat collecting plate 22, becomes a high-temperature, high-pressure gas in the compressor 23, and the refrigerant 11111 S! The exchanger radiates heat to warm the water in the water-side copper heat exchanger 20 and turn it into hot water. Here, the conveyed refrigerant becomes a medium-temperature, high-pressure liquid and collects heat fi, 2
2, the pressure is reduced by the expansion valve 24, and the liquid turns into a low-temperature, low-pressure liquid. On the other hand, the water heated by the copper heat exchanger 20 on the water side moves to the hot water storage tank 19 via the flow path (return side) 24, and then passes through the flow path (transmission side) 21 again for water supply and hot water supply. flow into the neutralization device 1'. In this water supply neutralization device 1', water flows in through the inlet 6, comes into contact with the solid basic substance 5 made of magnesium alloy, and flows out through the outflow lower. In addition,
Water flows into the water side copper heat exchanger 20 via the circulation pump 25. In addition, the water side copper heat exchanger is a double wall tube type and is integrated with lead plating.

The neutralization device 1 for water supply and hot water supply has a treatment tank with an internal volume of 1000 cc inside.

3004 city water (15°C) is stored in the hot water storage tank of this hot water supply equipment.
) and circulate it at a flow rate of 5 to 717 m1n.
The effectiveness was evaluated after 4 hours of operation to obtain hot water at 53°C.

Experiment 1〉 M,! 796%, A13%.

Zn1%), sodium silicate (N a 2025%, 5
i0275%), potassium silicate (K2025%, Si0
275%) grains (4-15xm soybean-like) were stored, and their effectiveness was confirmed using the water heater shown in Figure 7. The results are shown in Table 1.

The experiment used city water with a pH of 6.3, and the effectiveness characteristics were expressed from the results of water quality analysis of the water at the beginning of operation and after 24 hours. It can be seen that the elution of copper ions is suppressed by neutralization.

The following is a blank space: 1 Experiment 2〉 In the water supply neutralization device having the configuration shown in Fig. 4, M, j
99 alloy J99a%-A13%-Zn1%), sodium silicate (Na2025%-Si0275%),
We confirmed the effectiveness of the presence or absence of a screen using the hot water supply equipment shown in Figure 7. The results are shown in Table 2.

It can be seen that the presence of the net increases the pH and decreases copper ions.

Experiment 3 shown in Table 2> A granular basic substance was placed in the water supply neutralization device shown in FIG. 6, and the supply water was neutralized. This water was flowed into the hot water storage tank 19 of the hot water supply equipment shown in FIG. 7 (however, the neutralization device 1' for water supply and hot water supply in the same figure was not installed), and a 24-hour boiling test was conducted.

The results are shown in Table 3.

It can be seen that the elution of Tsugu ions is suppressed by the neutralization treatment of the water supply.

Experiment 4, shown in Table 3 in the margin below> Galvanized steel piping was attached to the flow path (return side) 24 of the hot water supply equipment shown in FIG. When using test water with a pH of 6.3, Zn"0.05 ppm if there is no neutralization device for water supply.
When the same equipment using the M9 alloy was installed, the elution of zinc ions was suppressed to Zn2+0.01 ppm at pH 80.

Experiment 5> Using hot water obtained from the water heater shown in Figure 7, an experiment was conducted to color a towel blue with soap. Conventional hot water equipment (
Hot water (pH 5
,8, Cu" 1.55 ppm, Mg"
'3ppm) Yes. , 5%. After 7 months, I soaked the towel in white, and after 15 repetitions, the towel turned blue. On the other hand, using the neutralization device for water supply and hot water supply of the present invention,
■Hot water (p
Even when a white towel soaked in 0.5% Sera□/Ken solution was stained with H7.3, C・2+11°0, O8ppm, My2+10ppm), the towel did not turn blue even after 30 repetitions. This is because when using the wood invention, the production amount of fatty acid copper (blue compound) decreases due to a decrease in copper ions, and the production amount of fatty acid magnesium (white compound) increases due to an increase in magnesium ions.

Effects of the Invention As described above, according to the present invention, a zigzag water flow path is formed in a treatment tank having an inlet and an outlet, and the following (I) and (II) are formed in the water flow path. Along with placing a large number of particulate basic substances selected from the group.

Since the net is arranged between the particulate basic substance and the inlet and outlet, (I) magnesium or magnesium alloy (I
I)! Sodium acid or potassium silicate The following effects can be obtained.

(1) Slightly acidic water becomes neutral to weakly alkaline, and elution of pipe metals is suppressed.

(2) The net prevents particulate basic substances from accidentally spilling out of the treatment tank during transport of the neutralization device or from flowing out during running water, and the rectifying action of the net improves neutralization performance.

(3) Basic substances also have a long life because they have low solubility.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a neutralizing device for water supply and hot water according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line A-A' in FIG. 1, and FIG. 3 is a cross-sectional view of another embodiment of the present invention. FIG. 4 is a cross-sectional view of another example, FIG. 5 is a cross-sectional view of another example, FIG. 6 is a cross-sectional view of another example, and FIG. 7 is a cross-sectional view of another example. It is a schematic diagram of a water heater repair device. 1... Processing tank, 5, 5'... Granular basic substance, 6... - inlet, 7... outlet, 8...
8a, 8b...net. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure S ffc Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] (1) A zigzag water flow path is formed in a treatment tank having an inlet and an outlet, and the following (I) is formed in this water flow path.
) A neutralizing device for water and hot water supply, wherein a large number of granular basic substances selected from the group (II) are arranged, and a net is arranged between the granular basic substances and the inlet and the outlet. (I) Magnesium or magnesium alloy (II) Sodium silicate or potassium silicate (2) The neutralization device for water supply and hot water supply according to claim 1, wherein the inlet and outlet are located above the particulate basic material. (3) Neutralization for water and hot water supply according to claim 1, wherein the treatment tank comprises a top cover having an inlet and an outlet, a bottom cover, and a side body located between the top cover and the bottom cover. Device. (4) The neutralizing device for water supply and hot water supply according to claim 1, wherein the top cover and the bottom cover are detachably fixed using screws. (5) Claim 1 in which a removable stopper is provided on the bottom cover.
Neutralization device for water supply and hot water supply as described in section.