4 results about "Deinking" patented technology

The application relates to a plasma direct deinking method, belonging to the paper deinking technical field.The plasma direct deinking method is characterized in that: a plasma spray gun with a special electrode structure is designed and manufactured, ionized working gas is used as a working medium, a plasma jet is generated to directly process the surface of paper materials, and different carrier gases are used according to different inks.The application uses ionized gas instead of chemical deinking agents, adopts a direct surface processing method, and under the bombardment of plasma particles, the combination of ink components with paper fibers is lost, and the pigments and other particles in the components are stripped from the surface of the paper, so that the ink on the surface of the paper is directly removed.The application can obtain a plasma direct deinking method.

The invention discloses an efficient paper pulp deinking regeneration process based on recycled waste paper, and belongs to the technical field of waste paper pulp deinking, and the efficient paper pulp deinking regeneration process comprises the following steps: conveying waste paper and water into a stirring barrel for repulping, and stirring the waste paper and the water to form high-concentration paper pulp, medium-concentration paper pulp and low-concentration paper pulp by adjusting the angle between a stirring blade and a stirring shaft, and adding different deinking agents according to the paper pulp with different concentrations, and then washing and deinking. According to the invention, the angle of the stirring blade is adjusted; the angle of the stirring blades is adjusted along with the change of the concentration of paper pulp in the stirring barrel, so that fibers and ink in the paper pulp are better dispersed, the deinking effect is better in the washing process, reverse flow circulation is formed due to the fact that the conveying directions of water and the paper pulp are opposite, the paper pulp and water are impacted at the same time, and the cleaning efficiency is improved; metal substances and ink particles in the waste paper pulp are further reduced, and the deinking effect is improved.

This invention relates to the field of fiber ink separation device technology, specifically a fiber ink separation device based on high-intensity grinding extrusion. The device includes a grinding extruder, which comprises a housing, a main shaft, and grinding columns mounted on the main shaft. The housing includes an upper shell and a lower shell; the upper shell has a closed structure, and the lower shell has a sieve plate structure. The main shaft has a conical structure, with the diameter at the end near the feed inlet smaller than the diameter at the other end. Several grinding columns, each with a square pyramidal structure, are arranged spirally and spaced around the main shaft to transport the slurry and, in conjunction with the inner wall of the housing, grind the slurry. This invention, by setting a high-intensity grinding extruder in the upstream process of the bleaching tower, utilizes a conical main shaft and spirally arranged square pyramidal grinding columns to forcefully push, squeeze, and knead the slurry, allowing ink particles to be initially physically separated. This reduces the difficulty of subsequent chemical deinking, shortens the time required for chemical deinking, and improves the efficiency of fiber ink separation.

The invention discloses an office waste paper pulp deinking process based on matching of a deinking agent and flotation equipment, which comprises the following steps: (1) primary flotation deinking treatment: adopting a vertical flotation tank as primary flotation equipment, and adding a nonionic surface active deinking agent into the primary flotation equipment; (2) secondary flotation deinking treatment: adopting a horizontal flotation tank as secondary flotation equipment, and adding a composite deinking agent into the horizontal flotation tank; and (3) three-stage flotation deinking treatment: a horizontal flotation tank is adopted as three-stage flotation equipment, the three-stage flotation equipment is provided with a foam generator, the residual composite deinking agent in the step (2) is utilized to play a deinking role, and the deinked office waste paper pulp is obtained. According to the technical scheme provided by the invention, the final total ink removal rate is obviously improved through accurate matching of the deinking agent type and the flotation equipment type.