JPH0628236Y2 - Water supply system for drinking water - Google Patents

Description

[Detailed Description of the Invention] << Industrial Application Field >> The present invention relates to a water supply device for drinking water, and more specifically for drinking water installed in a building or attached to a building at the expense of the user. Regarding water supply equipment.

<Conventional technology> In buildings of a certain scale or larger, water is received by a water tank, and this is pumped to an elevated water tank, which then supplies water to each water faucet.

The treatment methods in the waterworks are roughly divided into the slow filtration method and the rapid filtration method. In the slow filtration method, if the amount of microorganisms and the amount of oxygen in water are insufficient compared to the amount of treated water, the treatment capacity will be lost, and it will not be very effective for coloring components such as humic substances generated by biodegradation. Therefore, those treated by the rapid filtration method are common.

<< Problems to be solved by the invention >> That is, since slow filtration requires a large area, rapid filtration is adopted, but since bacteriologic safety remains insufficient, chlorine sterilization is used. The chlorine concentration increases,
Moreover, it is almost impossible to remove ammonia nitrogen, odor, manganese, and ABS (LAS) as a detergent component. With the recent pollution of raw water, the amount of flocculant added increases, resulting in "bad water".
It has come to be called "kusui water" or "dangerous water".

On the other hand, the water purifier used in the building had only a small device called "water purifier" that was directly connected to the faucet.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a drinking water supply device having a water purification function on a building scale.

<< Means for Solving the Problem >> In order to achieve the above object, the drinking water supply device of the present invention is a water supply system in which a water supply passage after a water receiving tank whose source is a water supply is divided into drinking water and others. The water purification device installed in the route is an activated carbon adsorption device, slow filtration tank, ultrafiltration membrane (UF
Membranes) are sequentially arranged, a disinfection facility is provided at the last stage, water supplied from the disinfection facility is stored in an elevated water tank exclusively for drinking water, and water is supplied from the elevated water tank to a dedicated faucet for drinking water.

<< Action >> The water stored in the water receiving tank is sent to the activated carbon adsorbing device only for use in beverages, and the residual charcoal and organic substances in the water are adsorbed by the activated carbon adsorbing device, thereby enhancing the ability of the slow filtration tank. Water that has been treated with an activated carbon adsorption device is sent to the slow filtration tank, which promotes the formation of biofilms, where dirt and bacteria are scraped off, and biochemical oxidation oxidizes and decomposes bad taste and odor. However, iron and ammonia are also removed by oxidation and rendered harmless.

The water that has passed through the slow filtration tank is further filtered by a UF membrane to remove various germs and pathogenic bacteria, and then residual chlorine and the like is retained in a disinfection facility to suppress the generation of microorganisms in the elevated water tank.

<< Embodiment >> Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the drawings.

The structure is shown in FIG. An elevated water tank 2 dedicated to drinking water is provided in the uppermost layer of the building 1, and a water supply pipe is connected from this water tank 2 to each dedicated drinking water faucet 3 in the building 1.

A water purification device 5 is provided between the water receiving tank 4 that receives clean water supplied from the water supply company and the elevated water tank 2.

In order to downsize the water purifier 5, the amount of treated water is reduced as much as possible. Therefore, the water supply channel that is sent from the water receiving tank 4 to the water purifying device 5 branches into drinking water and water used for other purposes, and is limited to drinking water only.

The water purification device 5 comprises an activated carbon adsorption device 6, a slow filtration device 7, a mineral addition tank 8, a UF membrane 9, and a chlorine addition device 10,
The water from the water receiving tank 4 is delivered and treated according to this order. That is, the water from the water receiving tank 4 enters the activated carbon adsorption device 6. In the tap water once stored in the water receiving tank 4, the organic substances increase due to the growth action of microorganisms in the water,
Adsorbed by activated carbon, the slow filtration device 7 is one in which coarse sand is gradually laid in multiple layers from the upper layer to the lower layer.
The surface of the sand is made up of a few mm thick microbial film that removes iron, manganese, and ammonia in addition to organic matter.

Minerals suitable for the human body are artificially added to the water treated by the slow filtration device 7 in a mineral addition tank 8, and this is further passed through a UF membrane (ultrafiltration membrane) 9 to prevent germs and bacteria from passing through this UF membrane. The pathogenic bacteria are removed, and water is supplied to the elevated water tank 2 through the chlorine addition device 10.

The chlorine addition device 10 is not limited to this, and may be bleaching powder or sodium hypochlorite that is usually used for tap water as a disinfectant.

<Effect> As described in detail above, the water supply device of the present invention separates washing water, wash water and drinking water, and passes only the drinking water through the water purifying device. Can be made small. Further, since the activated carbon adsorbing device is arranged before the slow filtration device, it is possible to reduce the burden on the biofilm of the slow filtration device and protect the slow filtration device. Then, the slow filtration tank and the ultrafiltration membrane decompose and remove the iron remaining in the clean water, the organic substances and the microorganisms grown in the water receiving tank, and the iron mixed with the rust in the water supply pipe.

In other words, it is biochemically and physically purified by the combined use of the slow filtration tank and the ultrafiltration membrane, and it is further sterilized at the stage before it is supplied to the elevated water tank dedicated to drinking water. Breeding can also be suppressed.

Since the faucet for drinking water is also dedicated, it is easy to maintain the unique state of drinking water without interference of the pipeline between the drinking water and other water.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of a drinking water supply device according to the present invention. 1 ... Building, 2 ... Elevated water tank 3 ... Drinking water faucet, 4 ... Water receiving tank 5 ... Water purification device, 6 ... Activated carbon adsorption device 7 ... Slow filtration device, 8 ... Mineral addition tank 9 ... UF membrane, 10 ... Chlorine addition device

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location C02F 9/00 Z 7446-4D

Claims (1)

[Scope of utility model registration request] 1. A water purifier installed in a water supply path to be used, which divides a water supply path after a water receiving tank using water as a water source into a water supply path for use, such as an activated carbon adsorption device, a slow filtration tank, and an ultrafiltration membrane. (UF membrane) is sequentially arranged, and disinfection equipment is installed at the last stage,
The water supply from the disinfection equipment is stored in an elevated water tank for drinking water,
A drinking water supply device, characterized in that water is supplied from the elevated water tank to a dedicated tap for drinking water.