Process for burning sulfur-containing fuels
a sulfur-containing fuel and process technology, applied in the field of burning sulfur-containing fuels, can solve the problems of high cost of so.sub.x removal, complex and difficult operation, and high emission of so.sub.x in view of existing environmental regulations
Inactive Publication Date: 2004-11-18
AIR LIQUIDE AMERICA INC
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Benefits of technology
[0016] Still another object of the present invention is to provide a process for burning sulfur-containing fuels that can be successively modified to provide adequate combustion characteristics resulting in adequate reduction of SO.sub.x formation sufficient to meet environmental guidelines without expensive and complex SO.sub.x treatment apparatus, such as scrubbers, etc.
[0017] Another object of the present invention is to provide a process for burning sulfur-containing fuels that can be successively modified to provide adequate combustion characteristics resulting in adequate reduction of NO.sub.x formation sufficient to meet environmental guidelines without expensive and complex NO.sub.x treatment apparatus.
[0018] An even further object of the present invention is to provide a process for burning sulfur-containing fuels that provides a means for chemically preventing the formation of SO.sub.x and concurrently provides a mechanism to avoid problems associated with slagging or other fouling of the combustion equipment.
[0019] Another object of the present invention is to provide a process for burning sulfur-containing fuels that provides a means for chemically preventing the formation of NO.sub.x and concurrently provides a mechanism to avoid problems associated with slagging or other fouling of the combustion equipment.
Problems solved by technology
Sulfur-containing fuels that are popular for power generation but especially problematic for emissions include coal, petcoke and heavy fuel-oil boilers.
Current methods of removing SO.sub.x from, e.g., coal fired boilers are very expensive.
NO.sub.x removal techniques are similarly expensive, complex and difficult to operate.
Thus, a problem associated with processes for burning sulfur-containing fuels that precede the present invention is that they produce a level of SO.sub.x emission that is unacceptable in view of existing environmental regulations.
Yet another problem associated with processes for burning sulfur-containing fuels that precede the present invention is that they produce a level of NO.sub.x emission that is unacceptable in view of existing environmental regulations.
Still another problem associated with processes for burning sulfur-containing fuels that precede the present invention is that they have not been successively modified to provide adequate combustion characteristics resulting in adequate reduction of SO.sub.x formation sufficient to meet environmental guidelines without expensive and complex SO.sub.x treatment apparatus, such as scrubbers, etc.
Another problem associated with processes for burning sulfur-containing fuels that precede the present invention is that they have not been successively modified to provide adequate combustion characteristics resulting in adequate reduction of NO.sub.x formation sufficient to meet environmental guidelines without expensive and complex NO.sub.x treatment apparatus.
Another problem associated with processes for burning sulfur-containing fuels that precede the present invention is that they have not been provided with a means for chemically preventing the formation of NO.sub.x and concurrently provided with a mechanism to avoid problems associated with slagging or other fouling of the combustion equipment.
Method used
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Embodiment Construction
[0026] In its simplest application, a process for burning a sulfur-containing fuel to produce a flue gas is disclosed. The process comprises introducing a sulfur-containing fuel into a combustion chamber, introducing an oxidant stream into the combustion chamber and mixing it with the sulfur-containing fuel to define a combustion zone, and introducing potassium carbonate into the combustion chamber. The sulfur-containing fuel is burned to produce the flue gas and potassium sulfate.
[0027] In the preferred embodiments, a combustion subassembly uses at least two, and sometimes three, oxidant streams. In the example in which coal is the sulfur-containing fuel, oxygen enrichment is employed to reduce NO.sub.x, as is more fully described in applicant's U.S. patent application Ser. No. 10 / (from S-6415), filed 15 Jan. 2004, hereby incorporated by reference.
[0028] In the preferred embodiments, a process designed to reduce SO.sub.x emissions in boilers, particularly in coal-fired boilers, is...
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A process for burning a sulfur-containing fuel to produce a flue gas is disclosed. The process comprises introducing a sulfur-containing fuel into a combustion chamber, introducing an oxidant stream into the combustion chamber and mixing it with the sulfur-containing fuel to define a combustion zone, and introducing potassium carbonate into the combustion chamber. The sulfur-containing fuel is burned to produce the flue gas and potassium sulfate.
Description
[0001] This application claims the benefit of U.S. Provisional Application No. 60 / 460,680, filed Apr. 4, 2003.[0002] 1. Field of the Invention[0003] This invention relates to the field of burning sulfur-containing fuels and to reducing the production of SO.sub.x and NO.sub.x therein.[0004] 2. Related Art[0005] Over the past several years, power generation processes and other combustion processes for burning sulfur-containing fuels have been subject to increasingly strict emissions restrictions, particularly for NO.sub.x and SO.sub.x. Sulfur-containing fuels that are popular for power generation but especially problematic for emissions include coal, petcoke and heavy fuel-oil boilers. Current methods of removing SO.sub.x from, e.g., coal fired boilers are very expensive. It is anticipated that within a few years, most of those boilers in the U.S. will require de-sulfurization equipment. NO.sub.x removal techniques are similarly expensive, complex and difficult to operate. The preferr...
Claims
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Login to View More IPC IPC(8): B01D53/50F23J7/00F23L7/00
CPCB01D53/508F23J7/00F23L7/007Y02E20/322Y02E20/344Y02E20/32Y02E20/34
InventorMARIN, OVIDIUPERRIN, NICOLAS
OwnerAIR LIQUIDE AMERICA INC