Recycle of waste streams

• US 5,443,717 A
• Filed: 01/19/1993
• Issued: 08/22/1995
• Est. Priority Date: 01/19/1993
• Status: Expired due to Fees

• Current Assignee: Scaltech International, LLC
• Original Assignee: Scaltech, Inc. (Siemens AG)
• Inventors: Carter, Walter A., Koopersmith, Craig A., Scalliet, Robert M.
• Primary Examiner(s): Pal, Asok
• Assistant Examiner(s): Yildirim, Bekir L.
• Application Number:
  US08/006,382
• Time in Patent Office: 945 Days
• Field of Search: 208/13, 208/252, 208/127, 208/131, 208/85, 208/48, 208/50, 210/770, 210/781, 210/787
• US Class Current: 208/131
• CPC Class Codes: C10B 39/06 in the oven
• CPC Class Codes: C10B 55/00 Coking mineral oils, bitumen, tar, and the like or mixtures thereof with solid carbonaceous material cracking oils C10G
• CPC Class Codes: C10G 9/002 Cooling of cracked gases

Abstract

A process for producing a delayed coker quench stream for use in the quench cycle of a delayed coking process wherein a waste stream containing water, organic compounds and solids is treated to produce a coker feed stream containing from about 5 to about 35% by weight solids, water and less than about 6% by weight mobile organics, the solids having a particle size distribution such that greater than about 70% of the total solids volume comprises solids having a particle size of less than about 15 microns.

Claims

1. In a process for producing delayed petroleum coke, wherein a liquid hydrocarbon feed stream is introduced into a delayed coking vessel under delayed coking conditions and the coke produced is quenched, the improvement comprising:

treating a waste stream containing water, organic compounds and solids so as to cause attrition of said solids to produce a delayed coker quench stream containing from about 5 to about 35% by weight solids, water and less than about 6% by weight mobile organics, said solids in said coker quench stream having a particle size distribution such that greater than about 70% of the total solids volume comprises solids having a particle size of less than about 15 microns; and

introducing said coker quench stream into said coking vessel during quenching.

2. The process of claim 1 wherein said solids in said coker quench stream have a mean particle size of less than about 10 microns.

3. The process of claim 1 wherein said solids in said coker quench stream have a particle size distribution that is generally Gaussian.

4. The process of claim 1 wherein said coker quench stream contains from about 5 to about 20% by weight solids and from about 2 to about 5% by weight mobile organics.

5. The process of claim 1 wherein treating of said waste stream comprises separating said waste stream in a high-speed vertical disk centrifuge.

6. A process for producing a delayed coker quench stream for use in producing delayed petroleum coke wherein a liquid hydrocarbon feed stream is introduced into a delayed coking vessel under delayed coking conditions and the coke produced is quenched comprising:

treating a waste stream containing water, organic compounds and solids so as to cause attrition of said solids to produce said delayed coker quench stream containing from about 5 to about 35% by weight solids, water and less than about 6% by weight mobile organics, said solids in said coker quench stream having a particle size distribution such that greater than about 70% of the total solids volume comprises solids having a particle size of less than about 15 microns.

7. The process of claim 6 wherein said solids in said coker quench stream have a mean particle size of less than about 10 microns.

8. The process of claim 6 wherein said solids in said coker quench stream have a particle size distribution that is generally Gaussian.

9. The process of claim 6 wherein said coker feed stream contains from about 10 to about 20% by weight solids and from about 2 to about 5% by weight mobile organics.

10. The process of claim 6 wherein treating of said waste stream comprises separating said waste stream in a high-speed disk centrifuge.