Method to optimize run lengths and product quality in coking processes and system for performing the same

• US 9,354,183 B2
• Filed: 04/23/2013
• Issued: 05/31/2016
• Est. Priority Date: 05/03/2012
• Status: Active Grant

• Current Assignee: ExxonMobil Research & Engineering Company (Exxon Mobil Corporation)
• Original Assignee: ExxonMobil Research & Engineering Company (Exxon Mobil Corporation)
• Inventors: Chimenti, Robert J., Albert, Brian D., Stober, Berne K., Wolfe, Christopher J.
• Primary Examiner(s): Robinson, Renee E
• Assistant Examiner(s): Mueller, Derek
• Application Number:
  US13/868,344
• Publication Number:
  US 20140311953A1
• Time in Patent Office: 1,134 Days
• US Class Current: 1/1
• CPC Class Codes: C10G 75/00 Inhibiting corrosion or fouling in apparatus for treatment or conversion of hydrocarbon oils, in general C10G7/10, C10G9/16 take precedence
• CPC Class Codes: G01N 21/64 Fluorescence; Phosphorescence
• CPC Class Codes: G01N 21/65 Raman scattering
• CPC Class Codes: G01N 21/94 Investigating contamination, e.g. dust G01N21/85 takes precedence
• CPC Class Codes: G01N 2201/08 Optical fibres; light guides

Abstract

System to detect coking in at least one component of refinery equipment is provided. The system includes a fiber optic assembly having at least one optical fiber operably coupled with the component, the fiber optic assembly further including a light source to transmit light having a known parameter through the optical fiber and a receiver to receive the light from the optical fiber, and a processor in communication with the fiber optic assembly to identify a shift in the parameter received by the receiver, the shift corresponding to an operating characteristic of the component. Method also provided for detecting coking using the system to detect coking disclosed herein.

Claims

1. A method of detecting coking comprising:

providing a fiber optic assembly including at least one optical fiber, the fiber optic assembly further including a light source to transmit light having a known parameter through the optical fiber and a receiver to receive the light from the optical fiber;

operably coupling the fiber optic assembly with at least one component of refinery equipment;

identifying a shift in the parameter received by the receiver;

determining a corresponding operating characteristic of the component;

providing a controller coupled with a processor; and

initiating an operation in response to the shift in the parameter received by the processor, wherein the operation includes introducing coil injection steam pulsing in the component.

2. The method of claim 1, wherein the operation includes rapid wash cycles.

3. The method of claim 1, wherein the operation includes a reduction in operating temperature of the component.

4. The method of claim 1, wherein the operation includes adjusting heat fluxes in the component.

5. The method of claim 1, wherein the operation includes removing deposits with high pressure jets.

6. The method of claim 1, wherein the operation includes washing with a solvent selected for enhanced solvency of deposited material.

7. The method of claim 1, wherein the operation includes changing distribution of wash fluid.

8. The method of claim 1, wherein the parameter includes a measure of one of wavelength, intensity, phase, and polarization.

9. The method of claim 1, wherein the parameter is a measure of Raman backscattering.

10. The method of claim 1, wherein the parameter is a measure of fluorescence backscattering.

11. The method of claim 1, wherein the parameter is a measure e of wavelength.

12. The method of claim 1, wherein the operating characteristic includes a measure of at least one of temperature, opacity, density, composition and mechanical strain.

13. The method of claim 12, wherein the parameter received by the receiver is wavelength and the operating characteristic is temperature.

14. The method of claim 12, wherein the parameter received by the receiver is intensity and the operating characteristic is the opacity of the fluid within the component.

15. The method of claim 12, wherein the parameter received by the receiver is intensity and the operating characteristic is density of particulate within the component.

16. The method of claim 1, wherein the component includes a vacuum distillation tower.

17. The method of claim 1, wherein the component includes a vacuum distillation tower feed furnace.

18. The method of claim 1, wherein the component includes an atmospheric distillation tower.

19. The method of claim 1, wherein the component includes an atmospheric distillation tower feed furnace.

20. The method of claim 1, wherein the component includes a transfer line.

21. The method of claim 1, wherein the component includes a coker feed furnace.

22. The method of claim 1, wherein the component includes a wash bed.

23. The method of claim 1, wherein the component includes a bottom sump and bottoms liquid outlet of a vacuum distillation tower.

24. The method of claim 1, wherein the component includes a layer of packing.