2results about How to "Realize energy utilization" patented technology

This invention provides a method for preparing hydrogen and sulfur from solid waste gypsum through reduction and acidification in a cement kiln, relating to the field of solid waste disposal technology. The method involves targeted local modifications to a novel dry-process cement clinker rotary kiln production system. Using desulfurized gypsum, phosphogypsum, and other solid waste gypsum as raw materials, the gypsum is crushed, ground, preheated, and dehydrated. Then, it is calcined in a modified three-lobe gravity semi-suspended rotary kiln at 800–1100℃ in a reducing atmosphere to generate high-purity calcium sulfide. After sealed cooling, the calcium sulfide reacts with byproduct hydrochloric acid to produce high-purity hydrogen sulfide. The hydrogen sulfide is then used to co-produce hydrogen and sulfur via a medium-assisted electrochemical decomposition method, or high-purity sulfur can be directly prepared using the Claus process. This invention achieves full resource utilization of solid waste gypsum using existing cement kiln equipment, requires minimal modification, has low investment costs, and enables the cascade utilization of CO waste gas and kiln waste heat, reducing overall energy consumption by more than 30% compared to traditional processes.

This invention discloses an exhaust gas burner, relating to the field of burner technology. The invention includes a base, a one-way pipe valve, an outer air duct, an exhaust gas combustion core, a combustion protection cover, and an auxiliary combustion core. The base includes a cylindrical section with vertically connected sections; a circular plate is fixed to the upper end of the cylinder; an internally threaded pipe is fixed through the center of the circular plate; a first flange is fixed to the lower end of the circular pipe; the output end of the one-way pipe valve is installed at the lower end of the internally threaded pipe inside the cylinder; the outer air duct is bolted to the upper end of the circular plate; the lower end of the exhaust gas combustion core mates with the inner wall of the outer air duct. Through the combination of the base, one-way pipe valve, outer air duct, exhaust gas combustion core, combustion protection cover, auxiliary combustion core, and igniter, the exhaust gas burns between the combustion protection cover and the auxiliary combustion core after ignition. During combustion, the auxiliary combustion core is at a high temperature, and the auxiliary combustion ring is red-hot. The combustible exhaust gas and oxygen undergo a strong oxidation reaction, effectively reducing the hazards caused by exhaust gas emissions.