154results about "Pulp de-watering" patented technology

The utility model relates to the technical field of papermaking, and discloses a detachable baffle group for a gas-liquid separation tank, which comprises the gas-liquid separation tank, a support frame is fixedly mounted at the bottom of an inner cavity of the gas-liquid separation tank, a baffle group is mounted at the top of the support frame, and the baffle group divides the inner cavity of the gas-liquid separation tank into a gas inlet chamber and a gas outlet chamber. A gas inlet connecting pipe communicated with the gas inlet cavity is fixedly installed on the side wall of the gas-liquid separation tank, a gas outlet connecting pipe communicated with the gas outlet cavity is fixedly installed at the top of the gas-liquid separation tank, the baffle set is of a four-way bent blocking type structure, a square through opening is formed in the top of the gas-liquid separation tank, a square flange cover is arranged at the position of the through opening, and the baffle set is fixedly installed on the gas-liquid separation tank. The top end of the baffle set is located at a through opening in the top of the gas-liquid separation tank, and a filtrate pump communicated with the gas outlet cavity is fixedly installed at the bottom of the side wall of the gas-liquid separation tank. According to the gas-liquid separation device, the baffle set is taken out from the interior of the gas-liquid separation tank, so that the baffle set is convenient to clean, maintain or replace.

Embodiments of the present disclosure may include a corrugated cover assembly for a vacuum rotary filter drum, comprising a corrugated cover element comprising crest sections and corresponding adjacent trough sections, wherein each trough section comprises an opening5 positioned at a first lateral side of the corrugated cover assembly, and each crest section and each trough section extend at least partially in a lateral direction of the corrugated cover assembly, the corrugated cover element comprises a lateral end at a second lateral side opposite the first lateral side, wherein the lateral end extends in a longitudinal direction of the corrugated cover assembly; and a sealing end strip extending along the lateral end of the corrugated cover10 element and arranged such that the lateral end is sealed.

The paper pulp dewatering device comprises a water collecting tank, a filter screen cylinder is rotationally connected to the upper portion of the interior of the water collecting tank through a bearing, a first rotating rod is arranged in the filter screen cylinder, and one end of the first rotating rod penetrates through the filter screen cylinder and is connected with a first motor; an external gear is connected to the outer side of one end, close to the first motor, of the filter screen cylinder, and a second gear is meshed above the external gear; through rotation of the dewatering blades and the filter screen cylinder, the filter screen cylinder and the dewatering blades can be fully cleaned, cleaning dead angles are avoided, the filter screen cylinder and the dewatering blades can be rapidly cleaned, the cleaning effect is improved, the cleaning efficiency is improved, and workers do not need to conduct external auxiliary cleaning; a third motor drives a reciprocating screw rod to rotate, and the reciprocating screw rod rotates to drive a mounting shell and a brush to reciprocate on the outer side of the filter screen cylinder, so that the outer side of the filter screen cylinder can be fully cleaned.

The utility model discloses a dewatering box for papermaking, which relates to the technical field of paper pulp dewaterer and comprises a dewaterer consisting of a concave case, a feed hopper and a material blocking device, the feed hopper is fixed at the top of one end of the concave case, the material blocking device is mounted at the other end of the concave case, a dewatering component is arranged on the inner side of the concave case, and the dewatering component is arranged on the inner side of the concave case. The dewatering assembly is used for conveying and dewatering paper pulp; the dewatering assembly comprises a dewatering box, a driving motor, a variable-diameter spiral feeding piece and an inclined flow guide piece. According to the utility model, the inclined flow deflectors are arranged, and water flow discharged from the screen holes above the central axis of the variable-diameter spiral feeding sheet flows downwards along the inclined surfaces of the inclined flow deflectors, so that the phenomenon that the water flow flowing out from the upper screen holes flows into the lower screen holes to cause the paper pulp to absorb water again can be avoided; the paper pulp dehydration efficiency and the dehydration effect are further improved.

The utility model provides a paper pulp extrusion papermaking device, and belongs to the technical field of papermaking. Comprising a base mounting frame, a hydraulic push rod is mounted above the base mounting frame, and an extrusion head is connected to the top end of the hydraulic push rod. Through the arrangement of the processing mechanism, a worker places paper pulp needing to be extruded in the processing box in advance, the extrusion head is driven by the hydraulic push rod to extrude the paper pulp, and after extrusion processing is completed, when the worker needs to process the paper pulp splashed on the inner wall of the processing box, the extrusion head is driven by the hydraulic push rod to extrude the paper pulp. The electric push rod can be started in advance to enable the top end of the electric push rod to be connected with the scraping frame to be separated from the embedded groove formed in one side of the inner side of the storage box, and then the motor is started to enable the transmission rod and the driving gear to rotate. Therefore, the gear ring can drive the rotating ring frame fixed in the middle of the gear ring to be matched with the sliding block and the sliding frame to conduct circumferential movement in a guiding mode, and therefore the scraping frame can be indirectly driven to conduct paper pulp scraping treatment along the inner side of the containing box.

According to an exemplary embodiment of the present invention, a method is provided that includes providing a pulp composition, screening the pulp composition to obtain an accept fraction and a reject fraction, and dewatering the accept fraction output from the screening by a screw press.

The utility model relates to equipment for cotton pulp treatment. The equipment comprises a pulp distributing mechanism, a pulp distributing mechanism and a pulp distributing mechanism, the pulp separating mechanism is used for carrying out solid-liquid separation on the cotton pulp; the fine material mechanism is used for scattering or smashing the wet cotton material subjected to solid-liquid separation; a material transferring mechanism; and the conveying device is used for conveying the scattered or smashed wet cotton materials into the drying device for drying treatment. According to the scheme provided by the utility model, the cotton pulp can be adjusted according to the concentration of the conveyed cotton pulp, so that the concentration of the cotton pulp entering the pulp separating mechanism is kept consistent, the conveyed wet cotton is uniform, and the reliability and the stability of production are ensured.

The present invention relates to the field of air filtration materials, in particular to an oil separation filter paper and its production process. Among them, the production process of the oil separation filter paper includes: raw material preparation, adding water and inorganic acid to a mixture of alkali-free glass microfiber cotton and alkali-free glass fiber short cut filaments and stirring evenly to make a pulp suspension; crushing and pulping, adding the prepared raw materials into a crusher for beating and dispersing, and filtering the pulp with a filtering device to obtain the pulp; wet forming, transferring the obtained pulp to a storage tank and diluting it to a mass concentration of 0.1-0.3%, and adjusting the pH value to 2.0-3.5, and transporting the pulp in the storage tank to a former for forming to obtain a wet paper; suction dehydration, dehydrating the obtained wet paper to make the moisture content of the wet paper less than 15%; sizing treatment, passing the treated wet paper through an impregnation tank and a spraying section respectively; drying treatment, drying the treated wet paper to obtain a primary glass fiber filter paper; finished product shaping, placing the obtained primary glass fiber filter paper into a mold for stamping and shaping.

The application discloses a raw material extrusion dewatering treatment device for xuan paper processing and relates to the field of dewatering devices. The raw material extrusion dewatering treatment device for xuan paper processing comprises a dewatering tank, a plurality of groups of dewatering holes one are arranged on the side wall of the dewatering tank, a plurality of groups of dewatering rods are installed in the dewatering tank at equal intervals, the dewatering rods are arranged in a hollow mode and communicate with the outside of the dewatering tank at the bottom, and a plurality of groups of dewatering holes two are arranged on the surface of the dewatering rods, the three-dimensional structure of the four peripheral dewatering holes and the central hollow dewatering rod is adopted to cooperatively drain water, the water discharge resistance of the middle region of raw materials is greatly reduced, the problem of wet inside and dry outside of the traditional device is solved, the inner wall of the dewatering rod and the tank body are sprayed with a Teflon anti-sticking coating, the adhesion of raw material fibers and the blockage of the dewatering holes are reduced, the difficulty of equipment cleaning and maintenance is reduced, the service life of the equipment is prolonged, a hot air auxiliary drying and waste heat recovery system is additionally arranged, low-temperature pre-drying is realized at the same time of extrusion dewatering, and the energy consumption of the subsequent drying process is reduced.

The utility model discloses a paper pulp centrifugal dewatering structure, including the box, the outer surface of box is connected with the mounting bracket, the outer surface of mounting bracket is connected with the rotating mechanism, the outer surface inlay of box has the first bearing, the inner ring of first bearing is connected with the first rotary lever, the one end of first rotary lever is connected with the driven wheel away from first bearing, the one end of first rotary lever is connected with the dehydration bucket away from driven wheel, the outer surface of dehydration bucket is equipped with the dehydration mechanism. This paper pulp centrifugal dewatering structure because dehydration bucket is transversely placed, therefore, when the paper pulp reaches the high place and automatically falls according to gravity when carrying out dehydration in the dehydration bucket, it is convenient to carry out overall dehydration to all paper pulp in the dehydration bucket, avoid the dehydration process of inside paper pulp of outside paper pulp to influence, and utilize the scraper can scrape the paper pulp that sticks in the dehydration bucket, prevent its adhesion in the dehydration bucket, influence paper pulp dehydration effect.

The present disclosure relates to a method for producing chemithermomechanical pulp, CTMP, comprising: a) providing wood chips comprising softwood, hardwood or a mixture thereof; b) storing the chips at a temperature of 45-75 °C for at least 24 h in an aerobic environment to obtain matured chips; c) impregnating the matured chips with an impregnation liquid to obtain impregnated chips; d) transferring the impregnated chips to a heating zone; e) heating the impregnated chips in the heating zone with steam to obtain pre-treated chips; f) defibrating the pre-treated chips to obtain a pulp; and g) dewatering the pulp.

The present invention relates to a method for dewatering microbial cellulose, the method comprising: contacting a wet microbial cellulose material with a hydrophilic polymer solution; maintaining contact between the wet microbial cellulose material and the hydrophilic polymer solution for a treatment period to remove at least a portion of the water from the wet microbial cellulose material; and removing the dewatered microbial cellulose from the hydrophilic polymer solution. the present invention further relates to a dewatered microbial cellulose material, the dewatered microbial cellulose material comprising: 25-95 % microbial cellulose by dry weight; and 5-75 % hydrophilic polymer by dry weight.

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.

The utility model discloses a paper pulp dehydrator water filtering device convenient for accelerating water filtering, which comprises a mounting base, a water filtering bin is fixedly mounted at the left end of the top of the mounting base, a first extrusion roller is rotatably connected in the water filtering bin, and a second extrusion roller is rotatably connected in the middle of the interior of the water filtering bin. A transmission box is fixedly mounted at the left end of the top of the mounting base, the output end of the transmission box is fixedly connected with the left end of the second extrusion roller, a water pipe is fixedly mounted at the inner top of the water filtering bin, and spray heads are fixedly mounted on a pipe body of the water pipe and are arranged in an array mode relative to the horizontal line of the water pipe. According to the water filtering device convenient for accelerating water filtering and used for the paper pulp dehydrator, water in paper pulp can be rapidly separated through extrusion, so that less energy is consumed, the dehydration efficiency is improved, the treatment time is shortened, meanwhile, the extruded paper pulp can be uniformly separated through vibration, and the paper pulp is kept in a dispersed state.

A rotary drum filter includes a drum shell configured to rotate through a slurry, the drum shell having areas defining a plurality of drainage holes, at least one divider plate a first end and a second end, the at least one divider plate disposed on an outer surface of the drum shell and extending longitudinally and laterally along the drum shell, the first end being disposed near a drainage hole, and a filter medium disposed on one or more grids that are disposed on the outer surface of the drum shell above the at least one divider plate. The at least one divider plate is configured to direct filtrate on the outer surface of the drum shell filtered through the filter medium into the drainage hole.

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.

The invention relates to the technical field of pulping, and discloses a pulp distributor and a using method thereof.The pulp distributor comprises a feeding cylinder, an access hole is formed in the feeding cylinder, and a flushing pipe is installed on the feeding cylinder; a slurry inlet pipe is installed on the feeding cylinder, a lower slurry turning plate is fixed in the feeding cylinder, a penetrating opening is formed in the lower slurry turning plate, a gear motor is installed on the bottom face of the feeding cylinder, a rotating shaft is rotatably installed in the feeding cylinder, the rotating shaft is connected with an output shaft of the gear motor, and the rotating shaft penetrates through the penetrating opening formed in the lower slurry turning plate. The rotating shaft and the penetrating opening are rotationally connected in a sealed mode, and a pulp distributing cylinder is arranged above the feeding cylinder. According to the slurry stirring device, the upper slurry turning plate is arranged, the slurry is continuously pressed downwards by the upper slurry turning plate, the slurry is promoted to be discharged through the slurry discharging opening, and the slurry can be uniformly distributed on the whole cross section of the reaction tower under the continuous action of the upper slurry turning plate, so that the distribution uniformity of the slurry in the reaction tower is effectively improved, and the slurry reaction quality is guaranteed.

The application provides a preparation method of lyocell fibrillated fiber, and specifically comprises the following steps: S1, adding lyocell cut fibers into water to control the concentration to be 2-4%, and dispersing the lyocell cut fibers by using a pulper; S2, filtering water from the dispersed pulp by using a filter press to obtain 10-30% high-concentration pulp, and conveying the high-concentration pulp to a group of high-concentration pulping machines by using a screw feeder to perform pulping, so as to obtain pulp 1 with a beating degree of 40-50°SR; S3, diluting the pulp 1 to a concentration of 1-3% by adding water, and performing beating and defibration by using a high-frequency defibrator, and repeatedly performing beating and defibration by using the high-speed hydraulic shearing effect of the high-frequency defibrator, so as to obtain lyocell fibrillated fiber with a beating degree of 75-95°SR. The lyocell fibrillated fiber can obtain a larger length and a lower fine fiber component by fully utilizing the friction force between fibers and the hydraulic shearing effect, a large number of fibrils can be obtained, and the lyocell fiber can be fully fibrillated.

Disclosed is a disc filter system and method for dewatering a fiber suspension. The disc filter system includes a disc filter and a control system. The disc filter includes an inlet for introducing the fiber suspension into a tank, a rotor shaft, a variable speed drive unit operably connected to the rotor shaft, and at least one filter unit connected to the rotor shaft, the at least one filter unit rotating with the rotor shaft. The control system measures the torque applied to the variable speed drive unit and causes the variable speed drive unit to adjust the rotational speed of the rotor shaft from a first rotational speed to a second rotational speed based on the torque applied to the variable speed drive unit.

The utility model relates to the technical field of preparation of high-bulk chemi-mechanical pulp, and discloses a spiral squeezing mechanism for preparation of high-bulk chemi-mechanical pulp, which comprises supporting legs, a squeezing mechanism is arranged at the tops of the supporting legs, a limiting mechanism is arranged at the top of the squeezing mechanism, and the squeezing mechanism comprises a squeezing assembly and a filtering assembly. The squeezing assembly is arranged at the tops of the supporting legs, during use, through the arranged squeezing mechanism, pulp for paper making can be stored under the action of the squeezing box, meanwhile, the pulp entering the squeezing box can be squeezed under the action of a first threaded rod, a sliding rod, a moving plate and a squeezing plate, and therefore the paper making efficiency is improved. And when the slurry is discharged, the slurry can be temporarily stored under the action of the material storage box, and the slurry in the material storage box can be quantitatively discharged under the action of the first air cylinder and the baffle, so that the phenomenon that the squeezing effect of the slurry is influenced due to excessive one-time discharging is avoided.

The utility model discloses a refined cotton pulp concentration device, which is characterized in that paired feeding boxes are respectively and fixedly arranged on the left side of a concentration cylinder, the feeding boxes are respectively communicated with the concentration cylinder, feeding pipes are respectively communicated with the paired feeding boxes, paired discharging boxes are respectively and fixedly arranged on the right side of the concentration cylinder, and the discharging boxes are respectively communicated with the feeding pipes. The discharging boxes are respectively communicated with the concentration cylinder, the discharging pipes are respectively communicated with the paired discharging boxes, the paired riding wheel seats are respectively and fixedly arranged at the front end and the rear end of the concentration cylinder, the plurality of riding wheels are respectively and rotatably arranged on the riding wheel seats, and annular guide rails are respectively arranged at the front end and the rear end of the concentration roller; the continuous pulp feeding and discharging device has the advantages that continuous feeding and discharging are achieved, pulp is directly discharged from the discharging box after being concentrated by the concentration roller, the pulp is discharged out of the discharging box, and the pulp feeding and discharging device is simple in structure, convenient to use and high in efficiency. And the production efficiency of concentration operation can be improved.

The invention provides a paper product, chemimechanical pulp and a preparation method of the chemimechanical pulp. The preparation method comprises the following steps: taking high-concentration grinding spraying pulp in a first concentration range; diluting the pulp to a second concentration range by using bleaching filtrate or clear water; dehydrating the slurry to a third concentration range; wherein the first concentration range and the third concentration range are both larger than the second concentration range; and adding a bleaching medicine into the pulp. According to the preparation method of the chemimechanical pulp for papermaking provided by the embodiment of the invention, the cleanliness of the pulp entering a bleaching tower is improved, the consumption of bleaching drugs is reduced, and the whiteness of the paper pulp is improved by adding a high-concentration mill pulp washing process.

The invention relates to an efficient energy-saving process design method for a multi-disc thickener, which comprises the following steps: a bypass channel is constructed between a feeding end and a discharging end of the multi-disc thickener, and is used for guiding part of raw slurry entering the multi-disc thickener to directly flow to an outlet of concentrated slurry; the concentrated slurry is washed with the raw slurry, and the processing capacity of the multi-disc thickener is improved; the concentration of the raw slurry is 0.5-2%, and the concentration of the concentrated slurry is 3-10%. The problem that in order to supply white water and maintain operation of related equipment, extra electric energy needs to be consumed is solved, and the energy consumption cost is further improved. The problems limit the overall performance and the production benefit of the multi-disc thickener.

The utility model provides a vacuum system applied to a pulp machine, which comprises at least one steam-water separator, at least one magnetic suspension vacuum pump and at least one water ring vacuum pump, and each water ring vacuum pump is at least connected with one steam-water separator through a first vacuum suction pipeline. And one magnetic suspension vacuum pump is at least connected with one steam-water separator through a second vacuum suction pipeline. According to the scheme, a water ring vacuum pump, a first vacuum suction pipeline and a steam-water separator in a traditional vacuum system are reserved, and a magnetic suspension vacuum pump and a second vacuum suction pipeline are additionally arranged. The first vacuum suction pipeline and the second vacuum suction pipeline are connected with a first control valve and a second control valve in series respectively, and the first control valve and the second control valve are switched according to production requirements. The vacuum system adopting the magnetic suspension vacuum pump can effectively improve the overall efficiency and reduce the power consumption of the system. The utility model further provides a pulp machine system.

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 method for removing and degrading starch by a compound enzyme system in a pulping process of waste box boards, which comprises alpha-amylase, beta-amylase, glucoamylase, pullulanase and pectinase. OCC white water and OCC paper pulp are subjected to enzymolysis through alpha-amylase and another three kinds of compound enzymes (beta-amylase, pullulanase and glucoamylase) which are compounded (the enzyme activity is conventional enzyme activity), and when the dosage of the compound enzymes is 1000 mL * t <-1 >, the enzymolysis rate of the compound enzymes is far superior to that of single alpha-amylase with the dosage of 5000 mL * t <-1 > at the same enzymolysis time; the starch decomposition rate of the waste paper pulp is increased by 3.75 times and reaches 42.8%, and the white water is correspondingly increased by 38% and reaches 42.8%.

The present application relates to the technical field of chemical fibers, and discloses a process for preparing lyocell pulp by mixing bamboo and wood pulp, comprising the following steps: bamboo pretreatment: cutting and shaping the bamboo, and then sequentially performing steam explosion defibration, acid treatment directional silicon removal and biological enzyme assisted delignification; wood pulp pretreatment: sequentially performing airflow sorting impurity removal, low-temperature alkali refining degreasing and biological enzyme deep purification; through the step-by-step directional pretreatment strategy, steam explosion causes microcracks in the cell wall of the short-cut bamboo fibers, and the high selectivity of the oxalic acid-ammonium fluoride composite acid liquid to silicate is used to achieve deep silicon removal of the short-cut bamboo fibers without damaging the cellulose skeleton; at the same time, the biological enzyme system step-by-step dissociates the hemicellulose side chain and the lignin aromatic ring structure, and removes the soluble oligomers, so that the risk of spinning blockage caused by silicon residues is eliminated under the premise of retaining the high polymerization degree cellulose of the bamboo, and the solubility of the pulp in the NMMO solvent is ensured.