Claims
- 1. A continuous process for treating exhaust gases to remove undesirable chemical components which comprises passing the exhaust gases through a gas treating system countercurrent to a liquid cleaning medium comprising an aqueous caustic soda solution, said system comprising a plurality of absorption segments arranged downstream of said exhaust gases comprising a first absorption segment and at least one intermediate segment said gas passing directly through each of said segments which comprises:
- 1. Introducing exhaust gas to be treated into said absorption segment,
- 2. Introducing fresh make-up cleaning medium exclusively downstream of the last absorption segment,
- 3. Permitting the cleaning medium to pass through said last absorption segment and a first intermediate absorption segment upstream of the last absorption segment,
- 4. Collecting the cleaning medium after it passes through the first intermediate absorption segment and recirculating a first portion of the collected cleaning medium through said first intermediate absorption segment,
- 5. Circulating a second portion of the collected medium to bypass a second intermediate absorption segment and recirculating a first portion of the collected medium which has bypassed the second intermediate absorption segment to permit said portion to pass through said second intermediate absorption segment,
- 6. Repeating Steps 4 and 5 with successive intermediate absorption segments when such segments are present until said first absorption segment is reached,
- 7. Recirculating a first portion of the collected medium which has passed the last of the intermediate absorption segments to permit said portion to pass through said last intermediate absorption segment, and
- 8. Removing from the system a second portion of collected cleaning medium from said first absorption segment, the amount of cleaning medium removed being substantially equal to the amount of fresh make-up cleaning liquid introduced into said last absorption segment.
- 2. A process as claimed in claim 1 wherein the undesirable chemical components being removed are chlorine and hydrogen chloride and the make-up cleaning medium is aqueous caustic soda solution.
Parent Case Info
This is a continuation of application Ser. No. 170,661 filed Nov. 19, 1979.
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
102e Date |
371c Date |
PCT/JP79/00064 |
3/13/1979 |
|
|
9/13/1982 |
9/13/1982 |
Publishing Document |
Publishing Date |
Country |
Kind |
WO79/00754 |
10/4/1979 |
|
|
US Referenced Citations (6)
Foreign Referenced Citations (6)
Number |
Date |
Country |
952692 |
Aug 1974 |
CAX |
44-2707 |
Jan 1968 |
JPX |
47-31868 |
Nov 1972 |
JPX |
49-30264 |
Mar 1974 |
JPX |
51-107278 |
Sep 1976 |
JPX |
52-88580 |
Jul 1977 |
JPX |
Continuations (1)
|
Number |
Date |
Country |
Parent |
170661 |
Nov 1979 |
|