54results about How to "Improve pulping performance" patented technology

A thermomechanical pulping method including: refining pulp with a high consistency refining stage, and a medium consistency refining stage processing the refined pulp discharge from the high consistency refining stage. Chemical pretreatments for improving pulp quality development during medium consistency refining can be optionally added at the pressurized chip press, fiberizer pre-refining step, primary high consistency refining step, and / or the standpipe feeding the medium consistency refiner.

The invention discloses a radix puerariae smashing and syrup making device which comprises a smashing mechanism and a stirring mechanism, wherein the smashing mechanism comprises a first shell, a conveying mechanism, a rotatably arranged rotating shaft, a baffle and multiple smashing rollers; one end of the conveying mechanism extends into the first shell; the conveying mechanism comprises two conveying rollers and multiple conveying belts arranged on the two conveying rollers in an encircling manner; a gap is reserved between every two adjacent conveying belts; the rotating shaft is arranged on the inner rings of the conveying belts; multiple blades are distributed on the rotating shaft; the blades extend out from the gaps between the conveying belts; the baffle is arranged above the conveying mechanism; the multiple smashing rollers are located below the conveying mechanism; a material outlet is formed in the bottom of the first shell; the stirring mechanism comprises a second shell, a stirring shaft and paddles; the stirring shaft is arranged in the second shell in a rotatable manner; the paddles are arranged on the stirring shaft; a material inlet, a water inlet and a syrup outlet are formed in the second shell; and the material inlet communicates with the material outlet. The radix puerariae smashing and syrup making device disclosed by the invention is good in smashing effect and good in syrup making effect.

The invention relates to paper making industry clean production, in particular to an alkali recovery method based on paper making black liquid. The method comprises the following steps of: 1) adding carbon powder in paper making black liquid, introducing CO2 gas for carrying out primary hydrothermal carbonization, and carrying out filtering to obtain primary hydrothermal carbonization liquid and primary hydrothermal carbonization materials; 2) adding crude activated carbon into the primary hydrothermal carbonization liquid obtained in the first step, carrying out secondary hydrothermal carbonization under the CO2 gas introduction condition, carrying out filtering to obtain secondary hydrothermal carbonization liquid and secondary hydrothermal carbonization materials, evaporating the secondary hydrothermal carbonization liquid, regulating the pH (Potential Of Hydrogen), and carrying out causticization treatment to obtain alkali liquid. The method provided by the invention has the advantages that because the alkali recovery work procedure is a bottle neck of most alkali process pulp making paper making plants in prior art, after the efficiency of the process is improved, the pulp making capability of the paper making plants can be greatly improved, meanwhile, the by-production of high-added-value activated carbon and white carbon black can be realized, and further, the scale benefits of the paper making enterprises can be integrally improved.

A pulper is used to comminute and suspend paper stock. The pulper includes a container that is open at the top and has a cylindrical side wall and a driven rotor, which is arranged eccentrically with respect to the center of the container. The bottom of the container can be provided with one or more truncated cones.

The invention belongs to the technical field of papermaking and discloses a method for reinforcing performance of waste paper pulp based paper with aldehydated hemicellulose. Water, hemicellulose andalkali are added to a reactor and stirred to react at 60 DEG C for 0.5 h, the pH value of the solution is adjusted to 3, an aldehyde compound is added, the mixture reacts at 60-100 DEG C for 0.5-5 h,and aldehydated hemicelluloses is obtained; then, waste paper pulp and the obtained aldehydated hemicellulose are mixed, water is added for defibering, the mixture is made into paper, drying is performed, and reinforced paper is obtained. The hemicelluloses and the waste paper pulp are taken as main materials, the hemicellulose is modified with aldehyde groups and used for reinforcing the mechanical performance of the waste paper pulp, a new idea is provided for utilization of the hemicellulose, and the method has practical significance in sustainable utilization of resources.

The invention discloses a hydrogasification semi-coke pulping method, which includes a start-up stage and a stable operation stage. The advantage of the present invention is that, through pneumatic conveying, the semi-coke is transported to the Venturi mixer to be mixed with industrial fresh water, the semi-coke is fully wetted in advance, and then the wetted semi-coke is transported to the slurry mixing tank, and the semi-coke is Coke directly enters under the liquid level of the pulping mixing tank, and is stirred with the industrial fresh water in the pulping mixing tank to make pulp, ensuring that the semi-coke is mixed into the industrial fresh water to the greatest extent, improving the utilization rate of the semi-coke and improving the pulping effect; mixing After the compressed gas with semi-coke enters the semi-coke treatment chamber, it moves upwards through the through hole of the tray. The semi-coke contacts the water film on the tray, and the semi-coke is intercepted by the water film and falls back to the pulping process with the flowing industrial fresh water. In the mixing tank, pulping is carried out, and the utilization rate of semi-coke is increased to 99%, which avoids the waste of semi-coke caused by emptying, and reduces the cost of semi-coke pulping.