US3927153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for direct cooling of corrosive industrial cases
Assignee: Bethlehem Steel Corp
•
Filing: 1973-08-14
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Granted: 1975-12-16
•
Expires: 1993-08-14
Abstract
Abstract A method of direct cooling of hot corrosive industrial gases, particularly coke oven gas, is achieved by cooling of the gases by direct countercurrent contact with a liquid coolant such that the exit temperature of the coolant is raised to a temperature at which absorption therein of corrosive amounts of acid gases is prevented.
Inventors
- 👤 Mehmet Orhan Tarhan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:38
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/14; B01D5/00; B01D5/0027; B01D5/003; Y; Y10; Y10S; Y10S261/00; Y10S261/11
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
203 words
A METHOD OF COOLING, IN A COOLING UNIT, A HOT INDUSTRIAL GAS HAVING AN ACID GAS COMPONENT AND AN INITIAL TEMPERATURE OF NOT LESS THAN ABOUT 100*C COMPRISING: A. PROVIDING A LIQUID COOLANT CHEMICALLY INERT TO SAID ACID GAS COMPONENT, B. PASSING SAID GAS AT SAID INITIAL TEMPERATURE AND AT A CONTROLLED FLOW RATE UPWARDLY THROUGH SAID COOLING UNIT, C. INTRODUCING SAID COOLANT AT A FIRST TEMPERATURE OF BELOW ABOUT 50*C AND AT A CONTROLLED FLOW RATE INTO SAID COOLANT UNIT ADJACENT THE UPPER END THEREOF. D. PASSING SAID COOLANT DOWNWARDLY THROUGH SAID COOLING UNIT IN A MANNER TO CAUSE DIRECT CONTACT BETWEEN SAID COOLANT AND SAID GAS, E. ADJUSTING THE CONTROLLED FLOW RATE OF SAID GAS AND OF SAID HYDROXIDE STATE, 20* TO 50*C AND TO HEAT SAID GAS IN SAID CHAMBER FROM 20* TO 50*C AND TO HEAT SAID COOLANT LIQUID FROM SAID FIRST TEMPERATURE TO A SECOND TEMPERATURE NOT LOWER THAN ABOUT 90:C SO THAT ABSORPTION OF CORROSIVE AMOUNTS OF THE SAID ACID GAS COMPONENT BY THE LIQUID COOLANT IS INHIBITED, F. COOLING SAID HEATED COOLANT FROM SAID SECOND TEMPERATURE TO SAID FIRST TEMPERATURE, AND G. RECYCLING SAID COOLANT TO SAID UPPER END OF SAID COOLING UNIT OF STEP (C).
Claim 2
Independent Claim
203 words
A METHOD OF COOLING, IN A COOLING UNIT, A HOT INDUSTRIAL GAS HAVING AN ACID GAS COMPONENT AND AN INITIAL TEMPERATURE OF NOT LESS THAN ABOUT 100*C COMPRISING: A. PROVIDING A LIQUID COOLANT CHEMICALLY INERT TO SAID ACID GAS COMPONENT, B. PASSING SAID GAS AT SAID INITIAL TEMPERATURE AND AT A CONTROLLED FLOW RATE UPWARDLY THROUGH SAID COOLING UNIT, C. INTRODUCING SAID COOLANT AT A FIRST TEMPERATURE OF BELOW ABOUT 50*C AND AT A CONTROLLED FLOW RATE INTO SAID COOLANT UNIT ADJACENT THE UPPER END THEREOF. D. PASSING SAID COOLANT DOWNWARDLY THROUGH SAID COOLING UNIT IN A MANNER TO CAUSE DIRECT CONTACT BETWEEN SAID COOLANT AND SAID GAS, E. ADJUSTING THE CONTROLLED FLOW RATE OF SAID GAS AND OF SAID HYDROXIDE STATE, 20* TO 50*C AND TO HEAT SAID GAS IN SAID CHAMBER FROM 20* TO 50*C AND TO HEAT SAID COOLANT LIQUID FROM SAID FIRST TEMPERATURE TO A SECOND TEMPERATURE NOT LOWER THAN ABOUT 90:C SO THAT ABSORPTION OF CORROSIVE AMOUNTS OF THE SAID ACID GAS COMPONENT BY THE LIQUID COOLANT IS INHIBITED, F. COOLING SAID HEATED COOLANT FROM SAID SECOND TEMPERATURE TO SAID FIRST TEMPERATURE, AND G. RECYCLING SAID COOLANT TO SAID UPPER END OF SAID COOLING UNIT OF STEP (C).
Claim 3
Dependent Claim
12 words
A method according to claim 1 in which the coolant is water.
Claim 4
Dependent Claim
14 words
A method according to claim 1 in which the coolant is a petroleum oil.
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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) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |