Claims
- 1. An apparatus for producing pure water from raw water, the apparatus comprising: a reverse osmotic membrane means; a purifying means connected to said reverse osmotic membrane means, said purifying means including a polisher and an ultraviolet sterilizer; a high pressure pump means having a suction side and a discharge side, said high pressure pump means having its discharge side connected to said reverse osmotic membrane means for forcing raw water to flow through a reverse osmotic membrane in said reverse osmotic membrane means to produce pure water permeated therethrough and for feeding said pure water through said purifying means and to a use point where the pure water can be used; and a circulating line means extending between said use point and the suction side of said high pressure pump means for circulating unused pure water from said use point to the suction side of said high pressure pump means for recirculation through said apparatus without storage in a tank.
- 2. An apparatus according to claim 1, further comprising a check valve means disposed in said circulating line means for preventing raw water from flowing backward into said circulating line means.
- 3. An apparatus according to claim 1, further comprising an opening and closing valve means disposed in said circulating line means, and a relief valve means disposed in parallel to said opening and closing valve means, said opening and closing valve being closed when said apparatus is brought into operation.
- 4. An apparatus according to claim 1, further comprising an ejector means disposed in said circulating line means and a washing liquid tank means connected with said ejector means for supplying a washing liquid through said ejector means into said circulating line
Priority Claims (1)
Number |
Date |
Country |
Kind |
59-180610 |
Aug 1984 |
JPX |
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Parent Case Info
This is a continuation of application Ser. No. 768,314, filed Aug. 22, 1985, now abandoned.
US Referenced Citations (6)
Non-Patent Literature Citations (1)
Entry |
Sourirajan, S., Reverse Osmosi, Academic Press, N.Y., 1970, pp. 465-467. |
Continuations (1)
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Number |
Date |
Country |
Parent |
768314 |
Aug 1985 |
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