Apparatus for automatically effecting vacuum concentration and recovery of waste liquid
Abstract
Abstract An apparatus for automatically effecting vacuum concentration and recovery of waste liquid comprising an evaporating vessel for which volume is relatively small and which is provided on its top with a steam riser tube which is occupied by a vapor separator and a condenser. The condenser is subjected through a drain tank consisting of two tanks connected in series, to vacuum. A waste liquid in a waste liquid recovery tank is supplied into the evaporating vessel and is heated by a steam heater and steam thus produced is condensed into distilled water by the condenser, the distilled water being discharged through the drain tank to the outside. The liquid level in the evaporating vessel, water level in the drain tank and liquid level in the waste liquid recovery tank are controlled by relays arranged on a control board in a manner such that the evaporating and concentrating operations of the waste liquid and discharge of distilled water are automatically repeated for a given number of times. The starting and stop of these automatic operations are manually effected.
Inventors
- 👤 K Takayasu
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-29 | 1978-01-28 | 1978-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-29 | 1982-01-28 | 1982-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-29 | 1986-01-28 | 1986-07-30 | $7700.00 | Window Closed / Lapsed |