47results about How to "Raise the ash melting point" patented technology

The invention belongs to the comprehensive field of potassium fertilizer production and CO2 emission reduction, and provides a method for concurrent production of potassium chloride and mineralization fixation of CO2. The process steps comprise: (1) adopting potassium feldspar, calcium chloride and coal as raw materials, preparing materials, carrying out ball milling, and carrying out pressing molding or pelletizing; (2) conveying the molded material or the material balls into a rotary kiln from the kiln tail, conveying air into the rotary kiln from the kiln head, and controlling a residence time of the molded material or the material balls at a temperature range of 800-1000 DEG C to 20-40 min; (3) crushing the calcinated material, and adding water to carry out potassium leaching through the water; (4) adding water to the potassium leaching residue to carry out pulp conditioning, and introducing CO2 to carry out a mineralization reaction; (5) carrying out returning of the potassium leaching solution so as to be used for leaching of potassium from the calcinated material when the Baume degree of the potassium leaching solution is less than or equal to 29, and carrying out evaporation concentration on the potassium leaching solution to achieve the Baume degree of 42-42.5 when the Baume degree of the potassium leaching solution is more than 29, and cooling to carry out potassium chloride crystallization; and (6) cooling the potassium extraction mother liquor to carry out calcium chloride crystallization, and carrying out solid-liquid separation to obtain calcium chloride and the calcium extraction mother liquor.

The invention discloses a preparation method of a novel biomass industrial fuel. The preparation method comprises: pulverizing raw materials, mixing them with polyethylene oxide, raising the temperature and drying the mixture until the water content reaches 5-20%, and extruding at room temperature After molding and cooling, the biomass industrial fuel of the present invention can be obtained. The preparation method is simple, and the obtained fuel has excellent water seepage resistance, good combustion effect, no overall deformation, no easy to fall apart, high ash melting point, no slagging and ash accumulation, and is suitable for industrial production.

The invention discloses a semi-coke additive for blast furnace injection and methods for preparing and using the same, and belongs to the technical field of blast furnace coal injection. The composition of the additive contains 0.1-0.25% of grinding aid, 58-80% of composite waste residue type catalyst, 18-40% of composite compound type catalyst and 1-4% of dispersant in terms of mass percentage. By adding this additive, the grindability and ash melting point of semi-coke can be improved, and the combustion effect can be improved, which greatly increases the amount of semi-coke injected in the blast furnace, and is suitable for large-scale popularization and application of semi-coke injected into blast furnaces. In the blast furnace injection system, semi-coke can be completely replaced by coal, which lays a good foundation for de-coalization.

The invention relates to an oil-burning or natural-gas-burning and tobacco-stem-burning integrated boiler and a contaminant control method and belongs to the field of oil-burning or natural-gas-burning and tobacco-stem-waste-burning boilers. The problems that slagging and coking exist when fuel oil or natural gas and tobacco stems are burnt together in a fluidized bed boiler are solved. A first smoke outlet of an oil-burning or natural-gas-burning combustor is sequentially communicated with a first oil-burning or natural-gas-burning combustor cooling chamber and a second oil-burning or natural-gas-burning combustor cooling chamber which are located behind the first smoke outlet. An outlet of a fluidized bed combustor is communicated with a first fluidized bed combustor cooling chamber and a second fluidized bed combustor cooling chamber which are located behind the outlet. The first fluidized bed combustor cooling chamber is separated from the second fluidized bed combustor cooling chamber through a first membrane panel separation wall. The lower end of the first cooling chamber membrane panel separation wall is connected with a U-shaped groove separator. The second fluidized bed combustor cooling chamber is communicated with a second smoke outlet of the second oil-burning or natural-gas-burning combustor cooling chamber. An outlet window of the second fluidized bed combustor cooling chamber is communicated with a first convection exhaust pipe and a second convection exhaust pipe. The second convection exhaust pipe is communicated with a coal economizer and an energy saver. The boiler is used for burning fuel oil or natural gas and tobacco stem waste.

The invention discloses a coal burner which is in a double-layer sleeve structure with an outside cylinder and an inside cylinder. The coal burner comprises a heat source and an internal combustion chamber, and the inside cylinder is utilized as the internal combustion chamber; the heat source is positioned in the internal combustion chamber, and the internal combustion chamber is provided with an inlet and an outlet; the heat source can be used for igniting coal dust airflow which passes through the internal combustion chamber, so that coal dust is subjected to imperfect combustion in the internal combustion chamber; and a cavity arranged between the outside cylinder and the inside cylinder is connected with an air source, the pressure of the air source is greater than that of the coal dust airflow, and the cylinder wall of the inside cylinder is provided with a through hole. The coal burner provided by the invention can be used for solving the technical problems such as coal depositing, scorification and the like on the premise of ensuring the combustion efficiency of the coal dust.