7results about How to "Low ash" patented technology

This invention discloses a rapid deep peak-shaving system and method for co-firing biomass in a coal-fired circulating fluidized bed, belonging to the field of fuel combustion technology. This invention controls in-furnace combustion by adjusting the biomass co-firing ratio and feeding position, thereby improving the response rate under varying loads. It utilizes a bed material storage and conveying system to recycle the bed material in the furnace, recover the sensible heat of high-temperature ash slag, and control the material concentration and circulation loop stability during load changes. Furthermore, this invention introduces heated, clean, low-oxygen flue gas into the furnace, suppressing the formation of excessive nitrogen oxides and facilitating bed temperature stability during rapid load changes.

This invention discloses a cerium sulfosalicylate sulfonate for use as a coal combustion catalyst, its preparation method, the catalyst itself, and its applications. The preparation method includes: S10, mixing cerium nitrate and sulfosalicylic acid dihydrate with water to obtain a cerium sulfosalicylate complex solution; S20, adding the cerium sulfosalicylate complex solution to a first reverse micelle solution to obtain a first mixed solution, then adding n-butanol in batches to obtain a first microemulsion; S30, adding ammonia to a second reverse micelle solution, then adding n-butanol in batches to obtain a second microemulsion; S40, mixing the first and second microemulsions and stirring to obtain a pale blue, opalescent colloidal solution, thus obtaining a second mixed solution; S50, drying and grinding the second mixed solution to obtain cerium sulfosalicylate. This cerium sulfosalicylate coal combustion catalyst is easily dispersed and can catalyze the pyrolysis and oxidation processes of coal from within, improving the utilization rate and calorific value of coal.

This invention belongs to the field of battery manufacturing technology, specifically relating to a wood-based hard carbon anode material, its preparation method, and its application in sodium-ion batteries. Addressing the high cost of hard carbon material precursors, this invention proposes a method for preparing a wood-based hard carbon anode material, comprising: using natural wood particles as a carbon source precursor, first subjecting them to hydrothermal treatment in a strong acid solution containing hydrogen peroxide, followed by high-temperature carbonization to obtain the wood-based hard carbon anode material. This invention uses natural wood as a raw material, eliminating the need for pore-blocking agents, and thus forming a wood-based hard carbon anode material with a closed-cell structure, providing a better environment for sodium ion insertion and extraction.

This invention discloses a heavy media separation process for upgrading coal slime. Coal slime is pumped into a coal slime classifying hydrocyclone at a feed pressure of 110-150 kPa, resulting in underflow and overflow. The underflow, with a particle size of 0.15-1 mm, enters a coarse coal slime tank, where the coal slime concentration is adjusted to 30-33%. This 30-33% concentrated coal slime is then pumped into a spiral separator to obtain concentrate and tailings. The concentrate flows by gravity into a dewatering and deashing system, while the tailings are pumped into a separation and classification system. The overflow, the fine particle outlet of the dewatering and deashing system, and the fine particle outlet of the separation and classification system are all connected to a thickening system. This invention regulates the concentration of the underflow from the coal slime classifying hydrocyclone using a coarse coal slime tank, maintaining the coal slime concentration entering the spiral separator at 30-33%, thus improving the separation efficiency of the spiral separator and reducing the ash content of the concentrate and tailings, thereby improving the quality of the coal slime product.

This disclosure relates to the field of carbon black technology, specifically a method for reducing the ash content of palm shell plant carbon black. The palm shell plant carbon black uses palm shells as raw material. The method includes the following steps: providing palm shells as raw material, carbonizing the palm shells to obtain palm shell plant carbon black; adding the palm shell plant carbon black to a first acidic solution and performing ultrasonic cleaning; then soaking it in a second acidic solution, followed by dry ball milling, and then soaking it in a third acidic solution; followed by wet ball milling; finally, after post-treatment, obtaining palm shell plant carbon black with reduced ash content. The method provided in this disclosure significantly reduces the ash content and other impurities in palm shell plant carbon black prepared from palm shells.