How is sulfur dioxide produced in boiler?
Sulfur dioxide is a common sulfur oxide, which dissolves in water to form sulfurous acid. When oxidized in the presence of PM2.5, it will quickly and efficiently generate sulfuric acid and cause acid rain. Therefore, the concentration of sulfur dioxide in boiler flue gas directly affects the environment, and is valued by many parties.
How is sulfur dioxide produced in boiler?
The principle of how sulfur dioxide is produced in boilers using different fuels is different. Sulfur in solid fuels in the form of organic sulfur and pyrite sulfur all take part in the reaction during the combustion process, oxidizing to sulfur dioxide, while sulfate does not take part in the combustion. The sulfur in the liquid mainly exists in the form of free sulfur, hydrogen sulfide, etc., which can easily react with oxygen and be converted into sulfur dioxide during fuel combustion. The sulfur in the fuel mainly exists in the form of gaseous hydrogen sulfide, and almost all of it is converted into sulfur dioxide during combustion, so the amount of sulfur dioxide produced is directly proportional to the sulfur content in the fuel and the oxygen content in the boiler.
Control method of sulfur dioxide concentration in boiler
After understanding how the sulfur dioxide in the boiler is produced, it is possible to control the emission of sulfur dioxide in a targeted way. The specific methods mainly include the following three categories:
1. Desulfurization before combustion
Adopt desulfurized coal or clean fuel natural gas.
2. Desulfurization in combustion
In-furnace calcium injection desulfurization is common in circulating fluidized bed boilers. The characteristics of low-temperature combustion of circulating fluidized bed boiler make it possible to adjust the distribution of boiler heating surface, and ensure that the furnace combustion temperature is between 860 and 880, which is consistent with the combustion desulfurization temperature of most natural limestone.
3. Desulfurization after combustion
Flue gas desulfurization technology should be more common environmental protection methods, including limestone-gypsum method, magnesium oxide method, ammonia method, sodium alkali method, double alkali method, etc. With the strict requirements of environmental protection, boiler tail gas treatment systems are mostly integrated technologies of desulfurization, denitrification and dust removal.
ZOZEN Boiler mainly produces energy-saving and environment-friendly industrial boilers, covering oil-fired boilers, gas-fired boilers, coal-fired boilers, biomass-fired boilers and thermal oil heaters.
-
DZW series biomass-fired reciprocating grate steam boilerLive Chat15-35 t/h1.25 MPa / 1.6 MPa / 2.5 MPa
-
DZL series biomass-fired steam boilerLive Chat2-10 t/h1-2.5 MPa
-
DZL series coal-fired steam boilerLive Chat2-10 t/h1-2.5 MPa
-
Email us
-
WhatsApp: +86 18861589035
WeChat: +86 13506150756
Live Chat
-
In Weihai, Shandong, the fish meal industry serves as a vital pillar of the local economy, now facing increasingly fierce market competition. Amid this landscape, enterprises are eager for energy solutions that are not only efficient and eco-friendly but also cost-effective. At this crucial moment, the ZOZEN triple drum biomass boiler has made a strong entrance, opening new paths for the local fish meal enterprises. ZOZEN Triple Drum Biomass Boiler: Paving a New Way for Fish Meal Enterprises ...24 Jun 2025
-
As global attention toward sustainable development intensifies, green and eco-friendly practices have become the main theme across all industries. For traditionally high-energy, high-emission sectors, technological innovation is essential to achieve clean production and unlock new growth. The plastic foam industry, a vital part of industrial manufacturing, has long faced the dual challenges of high energy consumption and environmental pressures. The emergence of biomass boilers offers a new gree...17 Jun 2025
-
With the ongoing advancement of the “Belt and Road” Initiative, economic and trade cooperation between China and Kyrgyzstan has become increasingly close. In February 2025, the two countries announced the launch of negotiations on a service trade and investment agreement, injecting new momentum into their bilateral collaboration. Against this backdrop, Chinese industrial equipment is making its way into Kyrgyzstan, helping local businesses grow—ZOZEN Boiler stands out as an exe...10 Jun 2025