A high-efficiency coal-burning sulfur-fixing agent based on oyster shells and its preparation method

Abstract

The invention discloses an efficient fuel-coal sulfur-fixation agent based on oyster shells and a preparation method. The efficient fuel-coal sulfur-fixation agent comprises the following raw materials in parts by weight: 10-12 parts of nanometer active titanium dioxide, 70-80 parts of oyster shells, 12-14 parts of porous silicon nitride, 3-4 parts of potassium nitrate as a combustion improver, 4-5 parts of potassium permanganate as an enhancer, 3.5-4.5 parts of manganese oxalate as an oxidation catalyst, 20-24 parts of sodium tartrate as a stabilizer, 9-10 parts of liquid paraffin as a dispersant, 8-10 parts of sodium alkyl benzene sulfonate, and a proper amount of deionized water. According to the invention, the oyster shells are adopted as a fuel-coal sulfur-fixation agent, high calcium carbonate content in oyster shells is directly utilized, and the sulfur-fixation cost is reduced; besides, the adopted oyster shells have higher porosity, large specific surface area and high temperature resistance after being combined with the active titanium dioxide and silicon nitride to be subjected to high-temperature calcination, the process that more SO2 is adsorbed on a sulfur-fixation agent during combustion can be facilitated, the retention time of SO2 is prolonged, and the sulfur-fixation reaction is further improved, so that the effect of efficiently fixing sulfur is achieved.

Description

technical field [0001] The field of coal-burning sulfur-fixing agent of the present invention, in particular relates to a high-efficiency coal-burning sulfur-fixing agent based on oyster shells and a preparation method. Background technique [0002] Oyster is a famous and common shellfish in the world, and my country's oyster production ranks first in the world. At present, the development and utilization of oysters in my country is mainly to process their edible parts, and a large number of oyster shells are discarded as garbage. The residual organic matter in these discarded oyster shells rots and stinks during the long-term stacking process, endangering the lives of residents, and the oyster shells themselves have become solid waste, causing serious pollution to the environment. Oyster shell is rich in calcium salt (CaCO3), has a rich natural porous surface, and has a certain biological activity, special physical structure, it is composed of cuticle, prismatic layer, nac...

AI Technical Summary

Problems solved by technology

The organic matter left in these discarded oyster shells rots and stinks during the long-term stacking process, endangering the lives of residents, and the oyster shells themselves have become solid waste, causing serious pollution to the environment