JPH0334994B2 - - Google Patents

Description

[Detailed description of the invention]

INDUSTRIAL APPLICATION FIELD The present invention relates to a water treatment device used for water and hot water supply piping using copper or galvanized steel, and water and hot water supply equipment having a copper heat exchanger. Conventional technology Conventionally, copper and galvanized steel have been used as water supply pipes, and copper pipes have been used as heat exchangers for water supply and hot water supply equipment, but when these are used in areas with low pH water quality, copper ions, zinc ions, and even iron Trouble caused by ion elution occasionally occurred. That is, blue water in copper pipes and red water in galvanized steel pipes. Blue water is the blue coloring of towels and bathtubs caused by a blue insoluble compound (fatty acid copper) produced by the reaction between eluted copper ions and fatty acids from soap, sweat, and grime, and red water is caused by the red rust caused by the disappearance of the galvanized layer. The water is colored red due to this outbreak. As a device for suppressing these water quality disturbances, a device shown in FIG. 7 has been conventionally used. This device uses a liquid rust inhibitor (phosphate or silicate).
A pump is used to inject water according to the amount of water supplied.A valve 2 and a flow meter 3 are attached to the pipe 1, and the flow meter 3 senses the flow rate of the supplied water, and a liquid rust preventive agent is injected into the chemical tank in proportion to the flow rate. 4, a control mechanism is attached to the pump 5 for adding water from the valve 2 to the pipe 1. Problems to be Solved by the Invention However, the above configuration requires (1) a control mechanism to adjust the amount of liquid rust preventive added according to the supply flow rate, which is expensive and requires handling and maintenance; is complicated. (2) Since a liquid rust preventive is used, it is vulnerable to freezing in winter and requires removal of the rust preventive. It had the following problems. The present invention solves these conventional problems and has the following advantages: (1) No control mechanism is required. (2) Easy to handle and maintain. (3) Resistant to freezing. (4) Low cost. water treatment equipment. The purpose is to Means for Solving the Problems In order to solve the above problems, the water treatment device of the present invention is provided by attaching a partition plate to the inner wall surface of a container having a drain port that can be freely opened and closed, with gaps provided below and above. Form a processing tank, and install the following () in this processing tank.
At least one solid basic substance selected from the group () and () is stored, and the water flowing into the treatment tank overflows from below the partition plate via the solid basic substance. () Magnesium or magnesium alloy. () Compounds containing oxides, carbonates, or hydroxides of magnesium or calcium. () A compound containing a silicate of at least one element selected from the group of potassium, sodium, magnesium, and calcium. Effects By having the above-described configuration of the present invention, this water treatment device does not require a control mechanism, and is easy to handle and maintain. Also, by opening the drain port, the water inside the container will flow, making it resistant to freezing. On the other hand, since the gap above the partition plate can be used as a bypass flow path, no clogging occurs even if the water flow path passing through the solid basic substance is blocked. Also,
Solid basic substances also have a long lifespan because they have low solubility. Embodiments Hereinafter, embodiments of the water invention will be described based on the accompanying drawings. FIG. 1 is a cross-sectional view of a water treatment apparatus according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line AA' in FIG. The water treatment device consists of a box body 6 and a lid body 7, and the box body 6 has an inlet 8, an outlet 9, and a drain port 10 that can be opened and closed. A partition plate 11 is provided on the inner wall surface of this box body 6 with gaps 12a and 1 at the upper and lower sides.
2b was provided and attached to form a processing tank 13, and a solid basic substance 14 was stored in this processing tank 13.
Water flows in from the inlet 8 and moves downward through the partition plate 11, and the gap 12b provided below the partition plate 11
This is a flow path in which water contacts the solid basic substance 14 via the outlet port 9 and overflows from the outlet 9. Note that the solid basic substance 14 is a mesh 1 made of stainless steel, chemical fiber, etc.
5 and stored in the processing tank 13. On the other hand, the lid 7 is fixed to the box 6 with bolts 16 and nuts 17, and an air vent cap (openable and closable) 18 is attached to the lid 7. In addition,
Attachment of this air venting cap 18 is optional. In addition, the water treatment equipment includes frames 20a, 20b,
It is attached to 20c and 20d. The following materials are used for the solid basic substance. Magnesium, magnesium alloys (e.g. magnesium 96
AZ31 alloy with % - 3% aluminum - 1% zinc,
Magnesium 90% - Aluminum 9% - Zinc 1%
AZ91 alloy), magnesium oxide, magnesium carbonate, magnesium hydroxide, calcium oxide, calcium hydroxide, calcium carbonate, zeolite,
Talc, glass, sodium silicate, potassium silicate, and a complex salt of sodium silicate and magnesium silicate. These materials are used in the form of granules, lumps, rods, pipes, and threads, but granules are particularly optimal from the viewpoints of excellent neutralization properties, low pressure loss, and little material outflow. The box body and lid body are made of stainless steel, tinned steel, enameled steel, and painted steel.
Corrosion may be prevented using a sacrificial anode such as aluminum or magnesium or cathodic protection. FIG. 2 is a sectional view of a water treatment device according to another embodiment of the present invention.
9 is used to provide a gap 12a above the partition plate 11. Although the inflow port 8 and the outflow port 9 are attached to the box body 6, they may be attached to the lid body 7. The most suitable solid basic substance is a magnesium alloy, a compound containing sodium silicate as a main component, or a compound containing potassium silicate as a main component. This is because it has excellent neutralization properties and has a low solubility, so it has a long life, and it dissolves completely at the end of life, leaving no residue, so it is less prone to clogging. The effectiveness was evaluated using the water treatment equipment shown in FIGS. 1 and 2. The water treatment equipment is made of stainless steel and has a cavity with an inner diameter of 20 cm and a height of 52 cm. A stainless steel partition plate (length 46 cm) was attached to the inner wall of this cavity at right angles to the inlet at a distance of 4.5 cm from the inlet with a gap of 1 cm above and 5 cm below. Note that the upper part of the inlet is provided 7 cm below the upper tip of the partition plate. The cavity on the outlet side formed by this partition plate was used as a processing tank, and a granular solid basic substance about the size of soybean was stored in this processing tank. When water flowed into this water treatment device from the inlet, the water overflowed from below the partition plate via the solid basic substance, forming a water flow path that flowed out from the outlet.
Magnesium alloy (Mg96
AZ31 alloy with %-Al3%-Zn1%), sodium silicate ( _SiO2 75%, _Na2O24 %, _{Al2O3 ・ Fe2O3 ・}
CaO・K ₂ O・MgO (trace amount), potassium silicate (SiO ₂ 75%, K _{2 O} 24%, Al ₂ O ₃・Fe ₂ O ₃・CaO・
Figure 4 shows the neutralization characteristics when using MgO (a trace amount of MgO).
It is shown in FIGS. 5 and 6. It can be seen that both have excellent neutralization performance. Further, Table 1 shows the neutralization properties when using various solid basic substances. Neutralization characteristics are as follows: 8 kg of granular solid basic substance is heated at 15°C with a flow rate of 5/min.
These are the characteristics when city water with a pH of 5.0 flows.

【table】

[Table] On the other hand, even if this water treatment equipment is left in an environment of -5℃ for one day while flowing water at a flow rate of 5.0/min,
Freezing could be prevented by leaving the drain open and draining a small amount of water from the water treatment equipment. Furthermore, even if the gap below the partition plate is closed and the gap becomes clogged, water overflows from above the partition plate and flows, proving that it is resistant to clogging. The anticorrosion effect of water supply equipment using this water treatment equipment was evaluated using a gas instantaneous water heater. The gas instantaneous water heater is a model with a hot water supply capacity of size 17, and is configured to obtain hot water by passing through a water tube type (plate fin pipe) heat exchanger made of phosphorus-deoxidized copper. A water treatment device was attached to the water supply port of this gas instantaneous water heater, and the effectiveness was determined by analyzing the water before and after passing through the water heater. Table 2 shows the results when using the water treatment device shown in Fig. 1 containing 8 kg of magnesium alloy particles. It can be seen that copper ions have decreased.

【table】

[Table] Using hot water obtained from a gas instantaneous water heater, an experiment was conducted to color a towel blue using a soap bar. A white towel soaked in 0.5% Setsuken solution was soaked in hot water (PH 6.3, Cu ²⁺ 0.66 ppm, Mg ²⁺ 8 ppm) obtained from a conventional water heater (no water treatment device) and repeated 15 times. The towel turned blue. On the other hand, hot water (PH7.0, Cu ²⁺ 0.30ppm, Mg ²⁺ 26.5ppm) obtained from a water heater using the water treatment device of the present invention (using Mg)
Even when a white towel was soaked in 0.5% Setsuken solution 30 times, the towel did not turn blue. This is because when the present invention is used, 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. In addition, when galvanized steel piping is attached to the hot water supply inlet of a gas instantaneous water heater and the amount of Zn ²⁺ and Fe ²⁺ eluted is measured, it is found that Zn ²⁺ is 0.05 ppm if there is no water treatment equipment;
Fe ²⁺ was 0.03ppm, but when the water treatment equipment was installed, Zn ²⁺ 0.01ppm, Fe ²⁺ 0.01ppm and zinc ions.
Elution of iron ions was suppressed. Effects of the Invention As described above, in the water treatment device of the present invention, a treatment tank is formed by attaching a partition plate to the inner wall surface of the device having a drainage port that can be freely opened and closed, with gaps provided at the bottom and the top. The solid basic substance is stored in the tank, and the water flowing into the treatment tank overflows from below the partition plate via the solid basic substance, creating a water flow path. (1) No control mechanism is required, making handling and maintenance easy. It is a water treatment equipment. (2) By opening the drain, the water inside the container will flow and will not freeze. (3) Since the gap above the partition plate can be used as a bypass channel, no clogging will occur even if the water flow channel passing through the solid basic substance is blocked. (4) The solid basic substance is selected from the group of () magnesium or a magnesium alloy, () a compound containing an oxide, carbonate, or hydroxide of magnesium or calcium, () potassium, sodium, magnesium, and calcium. Since it is a compound containing at least one type of elemental silicate, it has low solubility and long life. Furthermore, since it uses elemental components that are originally contained in city water, it is highly safe for health.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of a water treatment device that is an embodiment of the present invention, Fig. 2 is a cross-sectional view taken along line AA' in Fig. 1,
Fig. 3 is a sectional view of a water treatment device which is another embodiment of the present invention, Fig. 4 is an effect characteristic diagram of the present invention, Fig. 5 is an effect characteristic diagram of the present invention, and Fig. 6 is an effect characteristic diagram of the present invention. FIG. 7 is a configuration diagram of a conventional water treatment device. 8... Inlet, 9... Outlet, 10... Drain port, 11... Partition plate, 12a, 12b... Gap,
13... Processing tank, 14... Solid basic substance.

Claims (1)

[Claims] 1. On the inner wall surface of a device having a drain port that can be opened and closed,
A processing tank is formed by attaching a partition plate with a gap at the bottom and top, and the following () () are installed in this processing tank.
A water treatment device that stores at least one solid basic substance selected from the group of parentheses, and has a water flow path through which water flowing into the treatment tank overflows from below the partition plate via the solid basic substance. . () Magnesium or magnesium alloy. () Compounds containing oxides, carbonates, or hydroxides of magnesium or calcium. () A compound containing a silicate of at least one element selected from the group of potassium, sodium, magnesium, and calcium. 2. The water treatment device according to claim 1, wherein the solid basic substance is at least one selected from the group of compounds whose main components are magnesium alloy, sodium silicate, or potassium silicate. 3. The water treatment device according to claim 1, wherein the solid basic substance is granular.