Production method of high-concentration sulfur dioxide gas
A sulfur dioxide and production method technology, applied in chemical instruments and methods, inorganic chemistry, sulfur compounds, etc., can solve the problems of waste heat waste, inconvenient use of safe transportation, large cooling water consumption, etc., and achieve the effect of avoiding overheating
Pending Publication Date: 2021-11-26
WYLTON CHINA CHEM
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Problems solved by technology
When incinerating sulfur to produce sulfur dioxide, if the concentration of sulfur dioxide in the sulfur dioxide flue gas is to be increased to 18%, the incineration temperature will reach above 1600°C. Due to the limitation of the high temperature resistance of the equipment (operating temperature <1150°C), the sulfur produced by burning sulfur The concentration of sulfur dioxide in the flue gas will not be too high, generally lower than 13%, which cannot meet the needs of higher sulfur dioxide concentration in some occasions
Oxygen-enriched or pure oxygen incineration of sulfur can produce high concentrations of sulfur dioxide, but its cost is higher, and the incineration temperature is also higher, which cannot be tolerated by ordinary equipment
Now the oxygen-enriched smelting process can produce sulfur dioxide gas with a concentration of more than 18%, but it is often far away from the place where sulfur dioxide is used, and it is extremely inconvenient to transport and use safely. Even if separation, purification, compression, and liquefaction can be used to transport sulfur dioxide with a high concentration gas, but at a very high cost
In addition, the general high-concentration sulfur dioxide production process is to water-cool the high-temperature sulfur dioxide flue gas produced by sulfur combustion without recovering heat. The equipment can be simpler, but there is a lot of waste heat and a large amount of cooling water is required.
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Embodiment 1
[0013] Embodiment 1 of the present invention: a kind of production method of high-concentration sulfur dioxide gas, as attached figure 1 As shown, after the high-temperature sulfur dioxide flue gas produced by the combustion of the sulfur incinerator is cooled, part of the flue gas passes through the flue gas fan, returns to the front end of the entire production system through the pipeline, mixes with air, and enters the sulfur incinerator together. The concentration of sulfur dioxide gas in the mixed gas is less than or equal to 5.36%, and the remaining flue gas of sulfur dioxide enters the downstream process. At the same time, the liquid sulfur is sent to the sulfur furnace for spray combustion under the action of the liquid sulfur pump, and the flue gas of sulfur dioxide is discharged. And so on and on.
[0014] The high-temperature sulfur dioxide flue gas produced by the combustion of the sulfur incinerator is first cooled to 310°C-330°C by the waste heat boiler, and then...
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The invention discloses a production method of high-concentration sulfur dioxide gas, which comprises the following steps: cooling sulfur dioxide flue gas generated by combustion of a sulfur burning furnace, enabling part of the flue gas to enter a downstream process, enabling the rest flue gas to enter the sulfur burning furnace after being mixed with air before returning to the sulfur burning furnace through a pipeline, and simultaneously spraying and burning liquid sulfur in the sulfur burning furnace to generate sulfur dioxide flue gas with a proper concentration, and repeating the process. According to the method, the flue gas cooled by a waste heat boiler flows back, so that the concentration of sulfur dioxide in the flue gas can be increased to be higher, overtemperature of the sulfur burning furnace is avoided, and a large amount of heat can be recycled.
Description
technical field [0001] The invention relates to a production method of sulfur dioxide gas, in particular to a production method of high-concentration sulfur dioxide gas. Background technique [0002] Industrial production of sulfur dioxide is mainly obtained from direct incineration of sulfur-containing raw materials. When incinerating sulfur to produce sulfur dioxide, if the concentration of sulfur dioxide in the sulfur dioxide flue gas is to be increased to 18%, the incineration temperature will reach above 1600°C. Due to the limitation of the high temperature resistance of the equipment (operating temperature <1150°C), the sulfur produced by burning sulfur The concentration of sulfur dioxide in the flue gas will not be too high, generally lower than 13%, which cannot meet the demand for higher sulfur dioxide concentration in some occasions. Oxygen-enriched or pure oxygen incineration of sulfur can produce high-concentration sulfur dioxide, but its cost is higher, and ...
Claims
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Patent Timeline
Login to view more IPC IPC(8): C01B17/54F27D17/00
CPCC01B17/54F27D17/004F27D17/00F27D2017/006Y02P20/129
Inventor 张培清潘木俊
Owner WYLTON CHINA CHEM
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