189results about "Waste product addition" patented technology

The invention discloses a bobbin paper production technology which comprises the following steps: (1) papermaking reclaimed pulp undergoes high-concentration degritting and disk milling and then is placed into a coarse pulp tank; (2) waste paper is crushed by a pulper, and crushed paper pulp undergoes high-concentration degritting and then is placed into the coarse pulp tank; (3) coarse pulp in the coarse pulp tank is separated by a defibrator; (4) medium-concentration degritting is carried out; (5) fine screening and concentration are carried out; (6) the pulp is placed into a concentration tank; (7) the pulp undergoes disk mill and then is placed into a finished product tank; (8) the pulp is delivered to a machine chest, and paper mill sludge is added into the machine chest; (9) drifting is carried out through a drifting system, and a water repellent agent is added; (10) the raw material is conveyed to a net part of a paper machine, a dry strength agent is added into the net part, and starch is sprayed; (11) the raw material is processed by a press part of the paper machine; (12) the raw material is processed by a drying part of the paper machine; and (13) finished paper is reeled. According to the invention, reclaimed pulp and paper mill sludge which are generated during the papermaking process are fully utilized for production of bobbin paper. Thus, resources are saved; cost is reduced; and environmental pollution is also avoided.

Enzyme-treated papermaking sludges are provided, as are methods of making the enzyme-treated sludge. Papermaking processes that incorporate the enzyme-treated papermaking sludges into papermaking pulp are also provided as are paper and paperboard products made from the resultant pulp.

The invention discloses a method for regenerating corrugated paper by paper mill sludge cracking. By means of a papermaking process in which paper mill sludge is subjected to pressurized liquefying, low-temperature cracking, separating and dewatering, filter pressing and the like to be suitable for regenerating corrugated medium paper in a paper mill, the paper mill sludge is better recycled; besides, a low-temperature cracking technology is adopted in the paper mill sludge pretreating process, and no chemical agent is needed; meanwhile, waste gas generated in the paper mill sludge treating process is centralizedly treated, secondary pollution is avoided, and the paper mill sludge treating process further reduces the cost and has higher environmental friendliness.

A method for making an animal bedding fiber product, the method includes providing fiber from paper sludge, formulating the fiber in a mixture including a first desiccant agent including ash, so as to form a friable aggregate. Further, a fiber product including at least one short paper fiber from a secondary fiber, one or more inorganic fillers including kaolin clay; and a first desiccant agent including ash. Further still, a heatless process for making a fiber product including providing fiber from paper sludge, formulating the fiber in a non-active heat generating mixture including a first desiccant agent including ash, so as to form a waste fiber product.

A challenge in using recycled material in the papermaking process is the presence of hydrophobic organics with adhesive properties commonly known as stickies. Hydrophobic agglomerates can result in spots or defects in the final paper product or deposit on papermaking equipment resulting in poor runnability and downtime. Technologies for monitoring and controlling microstickies exist. However, a need exists for a technique to rapidly determine the size and content of macrostickies (diameter > 100 microns) in recycled pulp process streams. The present invention is a device and method to perform real-time macrostickies and / or any visible hydrophobic particle analysis in an aqueous medium. Using the present invention, furnish quality can be monitored and treatment performance can be monitored and controlled. The technique is based on fluorescence image analysis to identify and count sticky particles as well as measure their size

A method of treating solid containing material derived from effluent or sludge from a plant for deinking paper, the material containing calcium in the form of one or more insoluble calcium compounds, the method including the steps of treating the material with an acid to cause dissolution of the calcium thereby forming a calcium ion-containing solution in which insoluble solids are suspended, separating the solution from the insoluble solids and incinerating the separated solids. The solution containing calcium ions may be treated by adding one or more reagents to form a calcium compound precipitate, eg calcium carbonate. The particulate solids produced following the incineration step and following the precipitate formation may be employed as pigments or fillers in paper making or paper coating.

The invention provides a method for making paperboards by using paper mill sludge. The method comprises the following steps: by using paper mill sludge as auxiliary materials for making the paperboards by adopting an interlayer filling technology, fully mixing the paper mill sludge subjected to impurity removal pretreatment with a reinforcing agent, uniformly applying a mixture between two wet paper sheets, pressing, drying and finishing, thus forming the paperboards similar to sandwich structures. Compared with a conventional technology for making the paperboards through wet-end paper mill sludge addition, the method provided by the invention has the advantages that the added paper mill sludge can be mostly remained in the paperboards so as to form packing layers, thus the retention of the paper mill sludge in the paper boards is increased, and the method is simple in process, strong in operability and convenient to implement through an interlayer spraying method in a conventional papermaking process. The paper mill sludge is added to the paperboard making process so as to make the paperboard products meeting the quality requirements, so that the cost of fiber raw materials is saved for papermaking enterprises, and the purpose of digesting paper mill sludge solid waste in the enterprises is also achieved; the method is an effective approach for the resource utilization of the paper mill sludge.

The invention discloses paper produced by taking textile, industrial and agricultural waste residues as raw materials and a papermaking method, and belongs to the technical field of papermaking. Waste fibers generated in industry and agriculture are subjected to surface modification and blended with papermaking sludge, cottonseed velvet, cotton ash, vinasse, waste mushroom residues, traditional Chinese medicine residues, starch leftovers, potato residues, waste leather, straws, waste veneers, sawdust, waste bamboos, nutshells and other waste residues and corresponding additives for high-speed, medium-speed and low-speed industrial production of paper, 10-1500 g / m<2> paper can be produced, and paper quality reaches national standards. The pollution problem of the industrial and agricultural waste residues is solved from the source, more than 20 million tons of papermaking fibers are found for the papermaking industry, and the problem of domestic waste paper shortage caused by national limit on imported ocean garbage is effectively solved; and meanwhile, 95% of papermaking raw materials are waste residues and garbage, and the raw materials do not need to be purchased, so that the production cost is low, and very high benefits are brought to enterprises.

The invention provides a method for recovering solids in paper-making coating waste water. The method comprises the following steps: S1, removing the impurities in the coating waste water by using a screening machine, and sending the waste water without impurities into a sedimentation tank; S2, adding a flocculant into the coating waste water so as to enable the solids in the coating waste water to settle down to the bottom of the sedimentation tank; S3, collecting the settled solids, sending the collected solids into an intermediate barrel tank which is internally provided with a stirrer, and sequentially adding NaOH, a dispersing agent and a ground calcium carbonate solution into the intermediate barrel tank to obtain a total calcium carbonate solution, wherein the solid content of the ground calcium carbonate solution is higher than that of the settled solids; S4, grinding the total calcium carbonate solution, and recovering the ground total calcium carbonate solution. The method is used for effectively reducing the viscosity of a coating solution and increasing the dispersity and the grinding efficiency, and the solid content of the recovered coating solution reaches the high concentration suitable for a paper-making technology, so that the problem that a pipeline is easily blocked is solved, the investment for equipment is saved, and the process cost is greatly lowered.