Production method of sulfur dioxide gas

Abstract

The invention relates to a production method of sulfur dioxide gas, which is implemented by melting solid sulfur into liquid sulfur by heating, converting the liquid sulfur into sublimed sulfur and burning the mixture of the sublimed sulfur and air to generate the sulfur dioxide gas. The production method comprises the following steps: (1) sulfur melting: putting solid sulfur into a sulfur melting device, and heating a U-shaped heating jacket to melt the solid sulfur into liquid sulfur, wherein the sulfur melting device comprises a U-shaped sulfur melting groove and a U-shaped heating jacket attached to the external surface of the U-shaped sulfur melting groove, and hot furnace gas can pass through the U-shaped heating jacket; (2) gasifying: introducing the liquid sulfur into a sealed liquid sulfur gasifying tank, and heating to convert the liquid sulfur into sublimed sulfur; (3) burning: mixing the sublimed sulfur with air in a burning chamber, and burning to generate sulfur dioxide gas; and (4) cooling: introducing the sulfur dioxide gas into a first heat exchanger to cool with air, introducing the sulfur dioxide gas into the U-shaped heating jacket so that the solid sulfur in the U-shaped sulfur melting groove absorbs the heat of the sulfur dioxide gas, and introducing the sulfur dioxide gas into a second heat exchanger to cool with water.

Description

technical field [0001] The invention relates to a method for producing sulfur dioxide gas, an auxiliary raw material used in the sugar making process. Background technique [0002] Sulfur dioxide (SO 2 ) is an important auxiliary raw material in the process of sugar making, it is combined with Ca(OH) in the clarification process 2 The reaction produces CaSO 3 , so that the colloidal pigment is adsorbed and removed to clarify the sugar juice, and in addition, SO 2 It can also weaken or inhibit the formation of new pigments in the process of sugar production and reduce the discoloration of white sugar during storage. Therefore, SO 2 It plays a very important role in the sugar industry. [0003] SO currently used in sugar mills 2 Most of them are obtained by heating solid sulfur to melt into liquid sulfur, and then directly burning the liquid sulfur. This method has the following disadvantages: (1) The combustion process of liquid sulfur is not easy to control, and the res...

AI Technical Summary

Problems solved by technology

[0003] SO currently used in sugar mills 2 Most of them are obtained by heating solid sulfur to melt into liquid sulfur, and then directly burning the liquid sulfur. This method has the following disadvantages: (1) The combustion process of liquid sulfur is not easy to control, and the residence time of sublimated sulfur in the furnace is short, and some The sublimated sulfur is burned out of the sulfur furnace and then condensed before burning, and becomes solid sulfur and deposits in the pipeline equipment, which is easy to cause pipeline blockage and cause sulfur loss; (2) It is inconvenient to burn and ignite liquid sulfur; (3) ) When the sugar factory suddenly shuts down during the production process, it is difficult to stop the combustion process of liquid sulfur in time, which will cause sulfur-containing gas and SO 2 The gas overflows into the air without whereabouts, causing pollution and serious harm to the human body

In addition, sulfur combustion itself has a lot of heat, which has not been fully utilized at present

Images