Apparatus for the determination and evaluation of coal chemistry based on the genetics of fossil fuels

• US 7,809,526 B1
• Filed: 01/17/2008
• Issued: 10/05/2010
• Est. Priority Date: 03/17/2006
• Status: Expired due to Fees

• Current Assignee: Exergetic Systems LLC
• Original Assignee: Exergetic Systems LLC
• Inventors: Lang, Fred D.
• Primary Examiner(s): Barbee; Manuel L
• Application Number:
  US12/009,223
• Time in Patent Office: 992 Days
• Field of Search: None
• US Class Current: 702/183
• CPC Class Codes: F23N 2221/08 Preheating the air
• CPC Class Codes: F23N 2223/08 Microprocessor; Microcomputer
• CPC Class Codes: F23N 2223/10 Correlation
• CPC Class Codes: F23N 2223/40 Simulation
• CPC Class Codes: F23N 2225/10 stack temperature
• CPC Class Codes: F23N 2225/22 heat losses
• CPC Class Codes: F23N 2239/02 Solid fuels
• CPC Class Codes: F23N 2239/04 Gaseous fuels
• CPC Class Codes: F23N 2239/06 Liquid fuels
• CPC Class Codes: F23N 2241/10 Generating vapour
• CPC Class Codes: F23N 2241/18 Incinerating apparatus
• CPC Class Codes: F23N 2241/20 Gas turbines
• CPC Class Codes: F23N 5/003 using detectors sensitive to combustion gas properties F23N5/02, F23N5/18 - F23N5/26 take precedence
• CPC Class Codes: F23N 5/006 the detector being sensitive to oxygen
• CPC Class Codes: G01N 33/222 Solid fuels, e.g. coal
• CPC Class Codes: Y02E 50/10 Biofuels, e.g. bio-diesel

Abstract

This invention relates to any fossil fueled thermal system, and especially relates to large commercial steam generators used in power plants, and, more particularly, to a method and apparatus for determining fuel chemistry in essentially real time based on effluents resulting from combustion, associated stoichiometrics, and the genetics of the fossil fuel. Knowing the system'"'"'s fuel chemistry, the fuel calorific value, the fuel flow and the thermal performance associated with the thermal system may then be determined in essentially real time.

Claims

1. An apparatus for assisting the operation of a thermal system burning a fossil fuel, the apparatus comprising:

a data acquisition device to collect data from the thermal system including at least a selection of Choice Operating Parameters, the data acquisition device producing a set of acquired system data;

a computer with a processing means;

a set of instructions for configuring the processing means to determine a fuel chemistry of the fossil fuel based on a closed-form solution comprising of a set of stoichiometric equations of the combustion process, and known functionalities of the thermal system burning the fossil fuel, and to receive as input the set of acquired system data, resulting in a programmed computer;

means by which the programmed computer receives an input the set of acquired system data;

the programmed computer producing the fuel chemistry of the fossil fuel; and

means for reporting the fuel chemistry of the fossil fuel to assist in the operation of the thermal system.

2. The apparatus of claim 1 wherein the set of instructions for configuring the processing means to determine the fuel chemistry of the fossil fuel includes a genetics of the fossil fuel.

3. The apparatus of claim 1 wherein the programmed computer producing the fuel chemistry of the fossil fuel includes an Ultimate Analysis of the fossil fuel.

4. The apparatus of claim 1 wherein the programmed computer producing the fuel chemistry of the fossil fuel includes a complete As-Fired fuel chemistry of the fossil fuel.

5. The apparatus of claim 1 wherein the programmed computer producing the fuel chemistry of the fossil fuel includes a Moisture-Ash-Free fuel chemistry of the fossil fuel.

6. A device for evaluating an Ultimate Analysis of a coal sample, the device comprising:

a set of instruments capable of producing the Ultimate Analysis of a coal sample, and capable of producing an Ultimate Analysis output, said output comprising at least carbon, hydrogen and oxygen concentrations;

a data processing device with a processing means and a memory means wherein the memory means stores a set of descriptive fossil fuel data based on the genetics of fossil fuels organized by categories;

a set of instructions for configuring the processing means to compare the Ultimate Analysis with the set of descriptive fossil fuel data, and to receive as input the Ultimate Analysis output, resulting in a programmed data processing device capable of producing a comparative report on the Ultimate Analysis;

means of communicating the Ultimate Analysis output to the programmed data processing device;

the data processing device producing the comparative report on the Ultimate Analysis; and

means of communicating the comparative report on the Ultimate Analysis.

7. The device of claim 6, wherein the memory means of the data processing device stores a set of descriptive fossil fuel data based on the genetics of fossil fuels organized by categories based on ASTM D388 Ranks of coal.

8. The device of claim 6, wherein the memory means of the data processing device stores a set of descriptive fossil fuel data based on the genetics of fossil fuels organized by categories based on ISO 2950.

9. The device of claim 6, wherein the set of instructions for configuring the processing means to compare the Ultimate Analysis with the set of descriptive fossil fuel data includes instructions to identify outlier Ultimate Analysis.

10. The device of claim 6 wherein the set of instruments capable of producing the Ultimate Analysis of a coal sample includes the LECO CHN 600 and LECO CHN 132 instruments manufactured by the LECO Corporation.

11. The device of claim 6 wherein the set of instruments capable of producing the Ultimate Analysis of a coal sample includes the Model 2400 Series II CHNS/O Analyzer manufactured by PerkinElmer Inc.

12. The device of claim 6, wherein the memory means of the data processing device stores a set of descriptive fossil fuel data based on the genetics of fossil fuels in the form CH_c2O_c3, said form being normalized to carbon, and organized by categories based on ASTM D388 Ranks of coal.

13. The device of claim 6, wherein the memory means of the data processing device stores a set of descriptive fossil fuel data based on the genetics of fossil fuels in the form CH_c2O_c3, said form being normalized to carbon, and organized by categories based on the ISO 2950 standard.

14. The device of claim 6, wherein the memory means of the data processing device stores a set of descriptive fossil fuel data based on the genetics of fossil fuels in the form CH_c2O_c3, said form being normalized to carbon, wherein the c3 value is selected from the group consisting of a value from 0.009 to 0.024 for anthracite coal, from 0.025 to 0.054 for semi-anthracite coal, from 0.055 to 0.121 for the coal Ranks of hvAb and hvBb, from 0.122 to 0.170 for sub-bituminous A coal, from 0.171 to 0.183 for Powder River Basin coal, from 0.184 to 0.200 for sub-bituminous B coal, from 0.201 to 0.215 for sub-bituminous C coal, from 0.216 to 0.230 for lignite A, from 0.390 to 0.458 for Greek lignite, and from 0.459 to 0.520 for Irish peat, and combinations thereof.