154results about "Pulp liquor regeneration" patented technology

The invention relates to a papermaking wastewater fiber recovery device which is characterized in that a main water distribution channel positioned at a high position is butted and communicated with a plurality of branch water channels below through a main water distribution hole in the bottom, two rows of vertical water distribution lattice walls are arranged in each branch water channel along the length direction and divide the branch water channel into a middle chamber, a left chamber and a right chamber, and the main water distribution hole is opposite to the middle chamber; the bottom of the water distribution lattice wall is provided with an overflowing channel, the middle cavity is communicated with the left cavity and the right cavity, the weir crest portions on the two sides of the water distribution canal are provided with vertical water uniformizing plates, the outer side of the weir crest is provided with a net frame inclining downwards, inclined net cloth is laid on the net frame, and the bottom end of the net frame is provided with a horizontal chute bottom plate in the length direction. A vertical chute baffle is arranged on the extending outer side of the chute bottom plate in the length direction, and a collecting groove used for collecting fiber agglomerates is formed. Wastewater uniformly flows through the water passing surface of the inclined net, fibers are efficiently intercepted on the inclined net surface and form fiber bundle clusters to roll down under the action of inlet water washing and gravity, and slurry-water separation is realized through the action of gravity in the whole process.

The utility model discloses papermaking residue recycling equipment, and relates to the technical field of papermaking device.The papermaking residue recycling equipment comprises a base and a working mechanism, the upper end of the base is fixedly connected with the working mechanism, the working mechanism comprises a wastewater treatment assembly fixedly connected to the upper end of the base, and the outer side of the wastewater treatment assembly is fixedly connected with a water storage assembly; according to the papermaking residue recycling equipment, through the arrangement of the working mechanism, during use, the design of the working mechanism of the papermaking residue recycling equipment embodies the concepts of environmental protection and resource recycling, the influence of the papermaking industry on the environment is effectively reduced, and through the wastewater treatment assembly and the water storage assembly, the papermaking residue can be recycled. The equipment can reduce wastewater discharge and recycle water resources, meanwhile, the fixed protection assembly ensures the safety of operators, the heat dissipation assembly and the treatment assembly work cooperatively, the heat efficiency and the treatment capacity of the equipment are improved, and stable operation of the equipment is ensured.

The present invention provides a water-closed cycle waste paper pulping system and a process thereof, which relates to the technical field of pulping devices, and includes: a base, which is a rectangular plate-shaped structure, and is placed on the ground, and a box body with a rectangular box-shaped structure is fixed on the base. The present application, through the arrangement of the second barrel body and the third barrel body, firstly, can precipitate the pulp, and through precipitation, the excess water can be extracted, thereby ensuring the water content of the pulp; secondly, after the excess water is extracted, the water can be decomposed by a decomposition agent, and after decomposition, it can be put into the box body again for continued use, thereby realizing the circulation of water and saving water; the present application, through the arrangement of auxiliary components, firstly, the array-shaped air holes on the annular seat can improve the mixing effect of the pulp in the first barrel body, thereby improving the bleaching effect; secondly, under the telescopic action of the electric cylinder, the height change of the annular seat can be realized, thereby further improving the bleaching effect.

The invention relates to the technical field of sewage treatment, and provides a treatment system for reconstituted tobacco wastewater, which comprises a sewage pretreatment unit, a fiber recovery unit and a fiber drying unit, the sewage pretreatment unit comprises a first water collecting tank, a second water collecting tank, a coarse screen and a fine screen; reconstituted tobacco wastewater is introduced into the first water collecting tank; the water inlet of the second water collecting tank is communicated with the water outlet of the first water collecting tank; the fiber recovery unit comprises a third water collecting tank, a recovery plate and a recovery box; the water inlet of the third water collecting tank is communicated with the water outlet of the second water collecting tank; the fiber drying unit comprises a sedimentation tank and a sludge treatment tank; a water inlet of the sedimentation tank is communicated with a water outlet of the third water collecting tank, and a sludge outlet of the sedimentation tank is connected with a sludge inlet of the sludge treatment tank. According to the method, the fibers can be effectively recycled, the chromaticity and COD of the wastewater are reduced, and the reconstituted tobacco wastewater treatment efficiency and effect are improved.

The invention discloses a waste paper papermaking method capable of improving the cyclic utilization rate of white water, and relates to the technical field of waste paper papermaking. The tailings treated by the clarifier are recycled and used for preparing white water; in a papermaking workshop, white water is recycled through an off-machine white water tank; in a pulping workshop, a multi-disc fiber recycling machine is adopted for grading redundant white water in the workshop; the ultra-clear white water is filtered by a super-filter and then is used for a net part low-pressure spraying system and a pressing part low-pressure spraying system of a papermaking workshop; reusing the turbid white water into a pulper for pulping so as to recover fibers in the white water; and in a wastewater workshop, the wastewater subjected to anaerobic and aerobic treatment is treated by an ultrafiltration membrane and a reverse osmosis membrane. And through a four-stage recycling technology, the cyclic utilization rate of the white water in the waste paper papermaking workshop is increased to 97% or above.

Systems and methods are disclosed herein for proactive intervention in an industrial process involving a defoamer composition. Learning models are iteratively trained using historical input data sets comprising directly measured variables from the industrial process and correlations between combinations of the input data and respective process states. For a current input data set associated with the industrial process, and responsive to detected process attributes, an intervention event is determined with respect to at least a first defoamer component in a current composition. Models are utilized to predict, responsive to the intervention event, changes in target values within a specified range of target values for other components in the current composition and / or for directly measured variables as corresponding with a specified process state. Automatic control is performed for respective actuators to produce a new defoamer composition, and as needed to other actuators for the directly measured variables.

The present invention discloses a pulp recovery device in papermaking wastewater, which belongs to the field of papermaking technology, and comprises a barrel body and a barrel cover arranged at the upper end of the barrel body, wherein the upper end of the barrel cover is provided with a feed hopper, and the bottom surface of the barrel body is divided into a water filter chamber and a material receiving chamber by a partition, and a rotating shaft is provided through the middle of the top surface of the barrel cover, and filter cartridges matched with the lower end of the feed hopper are fixedly provided at both ends of the connecting plate, and a pressing assembly matched with the filter cartridge is provided at the lower end of the barrel cover. The beneficial effects of the present invention are as follows: by arranging the filter cartridge, the lower filter plate, the rotating shaft, the lever, the block, the pressing assembly and the transmission member, when the pressing assembly moves downward, the pulp in one of the filter cartridges is pressed and dehydrated, which is convenient for the staff to recover, and when the pressing assembly moves upward, the filter plate is initially lifted to the outside of the filter cartridge, and the rotating shaft is rotated by continuing to move upward through the transmission member, so as to achieve the effect of switching the positions of the two filter cartridges, and prepare for the next pressing.

The invention discloses a manufacturing method of an environment-friendly paper product. The environment-friendly paper product is prepared from the following raw materials in parts by mass: 60-70 parts of a main fiber raw material, 25-35 parts of an auxiliary fiber raw material, 3-8 parts of an environment-friendly additive and 1-2 parts of a pretreating agent. By means of the components, by adding the auxiliary fiber raw materials, the environmental protection property is remarkably improved, waste cotton and linen and agricultural waste are converted into papermaking raw materials, consumption of primary fibers is reduced, meanwhile, waste recycling is achieved, and pollution caused by incineration and landfill is reduced. The auxiliary fibers and the main fibers have a synergistic effect and are matched with the environment-friendly auxiliaries to reinforce the quality of the paper, the cotton and linen fibers improve the flexibility, the agricultural waste fibers enhance the stiffness, lignin and short fibers are separated through low-temperature pyrolysis, impurities are prevented from affecting the performance of the paper, and solid powder rich in the lignin and the short fibers is recycled and reused.

The utility model discloses an under-net white water tank efficient deslagging stirring treatment system which comprises an under-net white water tank, a multi-disc filter, an ultra-clear white water tank and a spraying water tank, and a deslagging stirrer which is driven by an external stirring motor and is used for suspending and discharging dirt deposited at the bottom is arranged in the under-net white water tank; the multi-disc filter is connected to a drainage pipeline of the under-net white water tank through a pipeline and is used for capturing and filtering impurities in the white water containing suspended stirring dirt; the spraying water tank is used for spraying the ultra-clean white water filtered in the ultra-clean white water tank to a paper machine net pressing part; the front side of the multi-disc filter is in bypass connection with a cushion slurry tank which is used for retaining fine fibers and fillers in the white water, providing cushion slurry for the multi-disc filter and improving the utilization rate of the white water; and through effective cooperation of the deslagging stirrer and the multi-disc filter, waste of water resources is reduced, the production cost is reduced, and the paper production efficiency is effectively improved.

The present invention provides a method for recovering white liquor and a white liquor separation accelerator that makes it possible to reduce the amount of white liquor contained in the lime mud after recovering the white liquor from the emulsion, thereby enabling the separation and recovery of more white liquor from the lime mud. [Solution] The method for recovering white liquor includes a white liquor treatment step of recovering white liquor by separating the lime sludge from the emulsion, which is a mixture of white liquor and lime sludge generated during the manufacture of kraft pulp, by filtration, and further includes a separation enhancement step of adding a white liquor separation enhancer, which contains at least a nonionic surfactant and promotes the separation of lime sludge and white liquor in the emulsion, to the emulsion before or during the white liquor treatment step.

The invention relates to the technical field of waste paper pulping, and discloses a water closed cycle waste paper pulping mechanism which comprises a support and further comprises an impurity removal box, a spraying box and a treatment box which are sequentially installed on the support from top to bottom. A mixing cylinder used for mixing repulping and a diluting component are installed in the treatment box, a spraying plate is arranged in the spraying box and used for spraying a solution into the treatment box, a conveying pipeline communicated with the treatment box is arranged on the outer side in the impurity removal box, the solution is conveyed into the impurity removal box through a water pump, and an air flotation component is arranged in the impurity removal box. Wastewater is reused, closed circulation of the wastewater is achieved, repulping is limited by the mixing cylinder, the wastewater in the circulation process does not need to be additionally filtered, in the wastewater reuse process, a large amount of repulping is diluted by a small amount of recycled wastewater, and the wastewater is recycled. Meanwhile, the solution can be circulated while being diluted, so that the discharge of wastewater is reduced.

Compositions and methods for the removal and prevention of scale in pulp mills in a continuous and real-time process. More particularly the composition includes one or more chelating ligands, one or more copolymers, and one or more surfactants. The scale removing composition is added to the black liquor stream in pulp and paper processes to remove scaling, such as scaling from calcium carbonate, from surfaces in contact with the black liquor stream, such as in digestors and evaporators.

According to an example aspect of the present invention, there is provided a method for manufacturing cellulose films and / or coatings from alkaline cellulose solutions via citric acid regeneration coagulation.

A paper mill black liquor waste heat utilization system belongs to the technical field of energy conservation and environmental protection. The utility model solves the problem that the residual heat cannot be effectively utilized due to environmental pollution caused by direct flash evaporation of the black liquor in the existing paper mill. Comprising a reboiler, a demineralized water system, a black liquor system and a positive pressure steam preparation system, the two ends of a heat release pipe in the reboiler are connected with the black liquor system through a liquid supply pipe and a liquid return pipe respectively, a steam-water side inlet in the reboiler is connected with the demineralized water system, and the positive pressure steam preparation system comprises a steam-water separator and a steam compressor. A steam inlet end and a steam outlet end of the steam-water separator are respectively connected with a steam-water side outlet of the reboiler and a steam inlet of the steam compressor through a negative pressure steam pipeline, and a steam outlet of the steam compressor is connected to a process demand point through a positive pressure steam pipeline. According to the utility model, the waste heat of the black liquor in the paper mill can be utilized, high-quality steam is prepared, the waste heat in the black liquor is recovered, and clean steam is generated and applied to the technological process.

A reconfigurable sorting facility is disclosed, including: a plurality of sorting facility devices; and one or more processors configured to: store physical layout information that describes corresponding positions of the plurality of sorting facility devices within a sorting facility; collect feedback data from the plurality of sorting facility devices; and identify at least a subset of the plurality of sorting facility devices to reconfigure based at least in part on the collected feedback data and respective positions of the subset of the plurality of sorting facility devices.

The invention provides a composite metal catalyst and application thereof in biological combined light treatment paper pulp bleaching. The method comprises the following steps: dividing and brooming cooked paper pulp fibers by adopting biological pretreatment, and then carrying out illumination bleaching under simulated sunlight irradiation by adopting a metal photocatalyst (ZnO, ZFO, ZAO, ZMO and the like). According to the mild treatment method, the whiteness of the paper pulp is improved, and meanwhile it is guaranteed that fibers are not damaged. Compared with traditional chemical bleaching, biological combined light treatment bleaching has the advantages that the content of pollutants in wastewater is greatly reduced, meanwhile, reacted metal oxides can be recycled, and the combined treatment method can be used as a novel paper pulp fiber bleaching mode.

The present disclosure is directed to a method for repulping lignocellulosic fibers having at least one wet strength resin disposed thereon, the method comprising: b) preparing an aqueous slurry comprising (1) the lignocellulosic fiber, (2) the resin, and (3) an enzymatic agent present in an amount of from about 0.01 to about 1 wt.%, based on the dry weight of the lignocellulosic fiber, wherein the enzymatic agent comprises: i) at least one hemicellulase; and, ii) at least one cellulase; and, c) agitating the slurry.

The present invention relates to a system for treating delignified cellulose pulp, comprising: consecutive first and second washing devices configured to receive and wash delignified cellulose pulp; an acidic bleaching device arranged to receive cellulose pulp from the second washing device; the post-acid-bleaching washing device is connected to the acid bleaching device and is used for washing the cellulose pulp received from the acid bleaching device; an alkaline bleaching device arranged downstream of the washing device; the alkaline bleaching post-washing device is connected to the alkaline bleaching device and is used for washing the cellulose pulp received from the alkaline bleaching device; a filtrate feeding means arranged to recycle the waste washing liquid from the post-alkaline-bleaching washing means as a diluent between the first washing means and the second washing means and / or as a washing liquid to the first washing means; and a source of water and / or condensate connected to the second washing device to provide a washing liquid.

A method for making precipitated calcium carbonate is provided. The process includes providing a suspension having calcium hydroxide and adding a processed lime mud to the suspension prior to the completion of carbonation to precipitate calcium carbonate.

The present invention discloses a foam control agent and a method for controlling foam in paper or pulp production by using the foam control agent, wherein the foam control agent contains at least a branched alcohol.

This invention provides a low-cost and environmentally friendly papermaking pulping process, comprising the following steps: S1. Pretreatment of papermaking fiber plant raw materials. S2. Oxy-alkali cooking: The pretreated papermaking fiber plant raw materials are mixed with an aqueous sodium carbonate solution, and cooked for 0.5–5 hours using oxygen as an oxidant. Then, sodium hydroxide is added, and cooking continues for 0.3–2 hours. Finally, the pulp and black liquor are separated by pressing. S3. Black liquor treatment: The black liquor is mixed with fiber waste, pressed, and burned as biomass fuel. S4. Recovery and causticization. This papermaking pulping process uses sodium carbonate and a small amount of sodium hydroxide for staged oxy-alkali pulping, and the generated black liquor is mixed with fiber waste and burned to recover sodium carbonate and heat, reducing the causticization rate and pulping costs.

The invention provides a clean production process for producing corrugated medium paper by using a waste paper box. The clean production process is characterized by comprising the following steps: step 1, pretreating the waste paper box through special equipment; 2, pulping and repulping: putting the treated waste paper box into special equipment, and controlling the pulping concentration; step 3, screening, purifying and mixing: screening and purifying the slurry through conventional filtering equipment, removing large particles and suspended matters, adding a petrochemical additive, and enhancing the fiber interweaving force through in-pipe mixing and a fibrillation process; the waste paper box is subjected to early-stage pretreatment by arranging special equipment, oiled paper, wax paper and the like influencing subsequent preparation are removed firstly, it is guaranteed that raw materials are clean, and the production quality of corrugated paper is guaranteed; and by designing the fourth step, waste materials and waste mud generated in the corrugated paper production process are fully utilized, resources are efficiently utilized, and waste is prevented.

The utility model relates to the technical field of dewatering devices, in particular to an efficient dewatering device for wood pulp knots, which comprises a storage barrel. The right end of the material storage barrel is fixedly connected with a material inlet, the right end of the material inlet is fixedly connected with the pump body, the right end of the pump body is fixedly connected with a material outlet I, the right end of the material outlet I is provided with a material falling pipe, one end, far away from the material outlet I, of the material falling pipe is fixedly connected with a material falling box, and the lower end of the material falling box is fixedly connected with the dewatering barrel; raw materials are controlled to enter the pump body, the discharging pipe and the discharging box from the feeding port and finally fall into the dewatering barrel, the spiral plate is controlled to rotate, extruded water can fall into the water storage pond through the water outlet hole, the dewatered raw materials can be extruded out of the second discharging port, and the bonded raw materials are blocked by the blocking disc and finally fall into the material storage box. Therefore, workers do not need to continuously add raw materials into the feeding port, and the materials are automatically fed mechanically, so that the dehydration efficiency is improved, and the waste of water resources is also reduced.

The invention discloses a composite modified coal-based solid waste filler as well as a preparation method and application thereof, and belongs to the technical field of inorganic solid waste recycling and green packaging materials. According to the process, the composite modified filler is obtained through multi-step synergistic modification of acid treatment, alkali treatment, silane coupling agent treatment and cationic polymer treatment in sequence; and mixing the filler with defibered plant paper pulp fibers, and carrying out wet molding and drying to obtain the high-performance packaging material. According to the synergistic modification process, high-content (35-55 wt%) filling of the coal-based solid waste is realized, the prepared material has excellent mechanical properties and environmental compatibility, the wet strength retention rate is greater than or equal to 70%, and the water absorption rate is less than or equal to 5%.

An arrangement (1) for treatment of bleaching chemical residues arrangement comprises a detector (2) arranged inside a process flow and configured to measure an amount of sulphite in the process flow by means of spectroscopy. The arrangement (1) further comprises a controller (3) connected to the detector (2) to receive measurement data from the detector (2) and configured to determine an amount of sodium bisulphite in the process flow based on the measurement data, and to control a process related to treatment of bleaching chemical residues based on the determined amount of sodium bisulphite in the process flow.

The invention relates to the technical field of papermaking, and discloses a calcium carboaluminate silicon removal material as well as a preparation method and application thereof. Dispersing CaO in water to obtain lime milk; the preparation method comprises the following steps: respectively dissolving NaAlO2 and Na2CO3 in water, and mixing with lime milk; performing synthesis reaction; and drying and crushing the obtained product to obtain the calcium carboaluminate silicon removal material. The calcium carboaluminate prepared by the method has a regular layered structure, a larger specific surface area of 8.21 m < 2 > / g and a higher crystal water content of 14.14%, so that the calcium carboaluminate shows an excellent silicon removal effect in high-temperature green liquor, and the silicon removal rate can reach 85.36%. The method for removing silicon from the high-temperature green liquor by using the calcium aluminosilicate can be directly used for industrial production, is favorable for improving the silicon removal rate of the high-temperature green liquor, and also has a relatively good calcium aluminosilicate sedimentation effect.