KR920016129A - A method for removing emissions in situ from a gaseous stream by injecting an emission absorbent downstream of the combustion zone. - Google Patents

Abstract

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Description

A method for removing emissions in situ from a gaseous stream by injecting an emission absorbent downstream of the combustion zone.

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Claims (30)

Combusting the fuel at a temperature of T ₁ in the combustion zone to release exhaust gas containing emissions; Moving the exhaust gas out of the combustion zone to cool the exhaust gas to a temperature T ₂ lower than T ₁ ; Providing an exhaust absorber; The exhaust gas generated by combustion of fuel, which is injected into the exhaust gas downstream of the combustion zone and at the point where the temperature of the exhaust gas becomes T ₂ so that the absorber absorbs the exhaust gas from the exhaust gas. How to remove emissions from The method of claim 1 comprising mixing the water with water prior to injecting the effluent absorbent to produce an aqueous effluent absorbent mixture. 3. The method of claim 2, comprising injecting the effluent absorbent mixture into the exhaust gas to form a fine spray liquid having an average droplet size of less than 100 microns. 3. The method of claim 2, comprising injecting said effluent absorbent mixture into said exhaust gas to form a fine spray liquid having an average droplet size of less than 50 microns. 4. The process of claim 3 comprising preparing said effluent absorbent mixture by mixing a water soluble absorbent compound selected from the group consisting of calcium compounds, magnesium compounds and mixtures thereof. 4. The process of claim 3 comprising preparing said emission absorbent mixture by mixing a water insoluble compound selected from the group consisting of calcium compounds, magnesium compounds and mixtures thereof. 6. The method of claim 5, further comprising mixing a water soluble metal salt promoter selected from the group consisting of salts of iron, copper, manganese, boron, aluminum, sodium, potassium, zinc and nickel, and mixtures thereof with the emission absorbent mixture. How to. 7. The method of claim 6, further comprising mixing a water soluble metal salt promoter selected from the group consisting of salts of iron, copper, manganese, boron, aluminum, sodium, potassium, zinc and nickel, and mixtures thereof with the emission absorbent mixture. How to. 6. The method of claim 5 wherein said promoter is selected from the group consisting of salts of iron, copper, manganese and boron, and mixtures thereof. 7. The method of claim 6, wherein said promoter is selected from the group consisting of salts of iron, copper, manganese and boron, and mixtures thereof. 6. The method of claim 5 wherein said promoter is selected from the group consisting of salts of iron and copper, and mixtures thereof. 7. The method of claim 6, wherein said promoter is selected from the group consisting of salts of iron and copper, and mixtures thereof. 8. The method of claim 7, wherein the molar ratio of water soluble absorbent to effluent is 0.4 to 1.2. 8. The method of claim 7, wherein the molar ratio of water soluble absorbent to effluent is 0.6 to 1.0. 9. The process of claim 8 wherein the molar ratio of water insoluble absorbent to effluent is from 0.5 to 2.5. 9. The process of claim 8 wherein the molar ratio of water insoluble absorbent to effluent is between 0.8 and 2.0. The method of claim 13, wherein the molar ratio of promoter to absorbent is 0.01 to 0.15. The method of claim 14, wherein the molar ratio of promoter to absorbent is 0.01 to 0.05. The method of claim 15 wherein the molar ratio of promoter to absorbent is from 0.01 to 0.10. The method of claim 16 wherein the molar ratio of promoter to absorbent is from 0.01 to 0.10. The method of claim 13, wherein T ₂ is 1093 ° C. (2000 ° F.) to 1260 ° C. (2300 ° F.). The method of claim 15, wherein T ₂ is 982 ° C. (1800 ° F.) to 1204 ° C. (2200 ° F.). The method of claim 7 wherein T ₂ is between 900 ° C. (1650 ° F.) and 1538 ° C. (2800 ° F.). The method of claim 1 including preparing an oil in an aqueous emulsion as said fuel. 2. The method of claim 1 comprising atomizing the fuel prior to combustion. The method of claim 1 wherein the fuel is a liquid fuel. The method of claim 1 wherein the fuel is a solid fuel. 7. A method according to claim 6, comprising the step of spiked the effluent absorber with a water soluble promoter selected from the group consisting of salts of iron, copper, manganese, boron, aluminum, sodium, potassium, zinc and nickel, and mixtures thereof. . 29. The method of claim 28, wherein the spiked effluent absorber particles are prepared from particles having an average particle size of less than 50 microns. 29. The method of claim 28, wherein said spiked effluent absorber particles are prepared from particles having an average particle size of less than 10 microns. ※ Note: The disclosure is based on the initial application.