281results about "Digesters" patented technology

The invention discloses a method for preparing high-quality dissolving pulp from low-grade plant fiber raw materials, and belongs to the technical field of biomass pulping. The preparation method comprises the following steps: screening a low-grade plant fiber raw material to obtain a fiber raw material of which the length is 20-30 mm, the width is 10-15 mm and the thickness is 3-5 mm; carrying out deep prehydrolysis-sulfate cooking treatment on the screened fiber raw materials to obtain unbleached sulfate pulp fibers; performing deep eutectic solvent and elemental chlorine-free bleaching treatment on the unbleached sulfate pulp fiber to obtain paper pulp fiber with low kappa number; and carrying out biological enzyme treatment on the paper pulp fibers with low kappa number to obtain the high-quality dissolving pulp. According to the method, the morphology and the structure of chemical pulp fibers are effectively regulated and controlled by designing deep eutectic solvent treatment, and deep dissolution of residual hemicelluloses and lignin is achieved; through biological enzyme treatment, the alpha-cellulose content and the Fock reaction performance are further improved, and finally the high-quality dissolving pulp is prepared.

The invention belongs to the technical field of pulp paper production, and particularly relates to a preparation method of low-dirt-degree and high-strength bleached sulfate mixed broadleaf wood wet wood pulp and pulp board. According to the invention, the acacia mangium chips and the eucalyptus chips are mixed and prepared, so that a foundation is laid for obtaining subsequent high-quality products; mixed wood chips are pre-impregnated in impregnation liquid with the effective alkali content being 4-8 g / L, so that the wood chips can react quickly in the cooking stage, and resin in broadleaf wood is eliminated; the wood chips are cooked, knotted, screened and washed, so that impurities in the slurry can be eliminated again; and by performing oxygen delignification treatment and bleaching on the coarse pulp, the quality of the pulp is improved. Therefore, the mixed broadleaf wood wet wood pulp and wood pulp board prepared by the preparation method disclosed by the invention are excellent in various indexes, low in dust degree, high in tension resistance, tear-resistant and breakage-resistant, and high-quality mixed wood pulp is provided for customers of paper for daily use.

In one example, a process includes providing a system with a first vessel and a second vessel; providing a biomass comprising lignin, hemicellulose and cellulose fibers into said first vessel; providing an aqueous acidic composition comprising an acid; providing a modifier component; providing a peroxide component; exposing said biomass to said sulfuric acid, modifier and peroxide components, creating a reaction mass; mixing said reaction mass; and allowing said sulfuric acid component and peroxide component to come into contact with said biomass for a period of time sufficient to a delignification reaction to occur and remove a pre-determined amount of said lignin from said biomass. The pre-determined amount may be assessed by determining a first remaining peroxide concentration in the reaction mass, with a suitable apparatus, when said first remaining peroxide concentration is reached, the biomass is transferred to said second vessel.

The utility model relates to the technical field of papermaking, in particular to a cellulose cooking device for papermaking, which comprises a cooking vessel, a feed port arranged at the top of the cooking vessel, a discharge port arranged at the bottom of the cooking vessel, a filter sieve arranged in the cooking vessel, a stirring rod arranged in the cooking vessel, and two groups of cleaning mechanisms arranged on the stirring rod, the lifting assembly is arranged on the digester; the rotating assembly is arranged at the bottom of the digester; according to the utility model, through the arrangement of the rotating assembly, the digester can be driven to turn over up and down through the rotating assembly, so that slurry can be turned over back and forth to form a good circulation capability, and through the arrangement of the lifting assembly at the top of the stirring rod and the arrangement of the cleaning mechanism on the stirring rod, when the slurry is stirred by the stirring rod, the slurry can be cleaned. The lifting assembly drives the stirring rod to move up and down, the cleaning mechanism can move back and forth along the filter sieve and the bottom of the digester, and scaling is prevented.

The invention belongs to the technical field of insulation paper, and particularly relates to a high-peel-strength vulcanized fiber base paper production line and process for electrical insulation, and the production line comprises a rack, and a material crushing device, a material boiling device, a pulp washing device, a water filtering device, a drying device and a forming device which are positioned on the rack, an interweaving device is further arranged between the water filtering device and the drying device and comprises a driving mechanism and a needle inserting assembly, and the needle inserting assembly has the movement amount of up-down reciprocating movement towards the conveying belt by means of the driving mechanism; part of transverse fibers of the paper pulp on the surface of the conveying belt are pressed by the needling assemblies to change the direction and are staggered longitudinally and transversely with other transverse fibers of the paper pulp. By additionally arranging the interweaving device, part of the transverse fibers in the horizontal direction are pressed through the pricking needle assembly of the interweaving device, the transverse fibers are changed in direction to form the longitudinal fibers in the vertical direction or inclined, the longitudinal fibers and the transverse fibers are interwoven, and therefore the peeling strength of the body paper is improved.

To provide a roughly crushed piece supply device capable of satisfactorily and quickly agitating, discharging and humidifying roughly crushed pieces, and also to provide a fiber structure manufacturing device.SOLUTION: A roughly crushed piece supply device comprises: a storage tank that stores roughly crushed pieces including fibers and has a first space and a second space positioned below the first space; an introduction port that communicates with the first space and introduces the roughly crushed pieces into the first space; a partition part that divides the storage tank into the first space and the second space and has a communication port to make the first space and the second space communicate with each other; an adjustment part to adjust amount of the roughly crushed pieces transferred from the first space to the second space through the communication port; an agitation part to agitate the roughly crushed pieces in the second space; and a discharge port to discharge the roughly crushed pieces agitated by the agitation part from the second space.SELECTED DRAWING: Figure 2

The invention relates to the technical field of pulping production, in particular to a spherical digester device for pulping. Comprising a fixing frame, a spherical heat preservation shell is arranged in the fixing frame, a spherical cooking shell is concentrically fixed in the heat preservation shell, rotating shafts are fixed to the two ends of the cooking shell, the rotating shafts penetrate through the heat preservation shell and are rotationally connected with the fixing frame, and a driving unit for driving the rotating shafts to rotate is arranged on the fixing frame. The cooking shell and the heat preservation shell are driven by the motor to rotate integrally, and a multi-dimensional mixed flow field is formed under the action of centrifugal force and gravity in combination with the baffle structures uniformly distributed on the inner circumference. The wood chips and the alkali liquor are repeatedly cut and dispersed by the baffles in the rolling process, the static accumulation and layering phenomena are broken, uniform permeation of fibers and the reaction liquor is achieved, and the cooking reaction time is greatly shortened.

The invention belongs to the pulping and papermaking industry, and particularly relates to a replacement type continuous cooking method and device, which is characterized in that when a fiber raw material is cooked and pulped, firstly, raw material fibers are subjected to single-stage or multi-stage preimpregnation by using cooked concentrated black liquor, so that residual liquor and heat in the black liquor are fully utilized; and then replacing the black liquor carried by the pre-impregnated raw material fiber by using a cooking liquid medicine with relatively high medicine concentration, rapidly cooking the replaced raw material fiber into pulp under relatively high medicine concentration, pressure and temperature, and sending the pre-impregnated black liquor to a black liquor treatment process. According to the method and the device, residual liquid medicine and heat in the black liquor after cooking can be fully utilized, energy consumption and medicine consumption generated in the fiber cooking stage can be greatly reduced, the concentration of the black liquor subjected to black liquor removal treatment can be improved, the method and the device particularly accord with pulping characteristics of non-wood fibers, and the fiber cooking cost, especially the pulping cost of the non-wood fibers, can be greatly reduced.

The utility model discloses raw material cooking equipment for bamboo fiber production, which comprises a cooking box, the upper surface of the cooking box is movably hinged with a sealing cover through a hinge, the upper surface of the cooking box is fixedly connected with a preheating box, and the front surface of the preheating box and the front surface of the cooking box are jointly and fixedly communicated with a water replenishing valve. Two heating pipes are fixedly mounted in the cooking box, and a first water level sensor is arranged in the cooking box. The heating pipe is arranged in the cooking box to cook water and bamboo fiber raw materials in the cooking box, hot steam generated in the cooking process flows in the preheating box through the exhaust coil pipe, stored water is arranged in the preheating box, and water vapor and heat conducting fins passing through the exhaust coil pipe can heat the water in the preheating box. Water in the preheating box has a certain temperature when being supplemented to the cooking box, and meanwhile, water vapor passing through the exhaust coil pipe can be cooled, condensed and utilized, so that the utilization of water resources is reduced.

The utility model relates to the technical field of refined cotton, in particular to a refined cotton cooking device with a tail gas absorption mechanism, which comprises a base and a cooking pot, the cooking pot is arranged at the upper end of the base, a support frame is arranged on one side of the base, an adjusting mechanism is arranged at the bottom end of the cooking pot, a movable component is arranged in the adjusting mechanism, and the tail gas absorption mechanism is arranged on the movable component. An adjusting assembly is arranged at the bottom end of the cooking pot, a fixing plate is arranged in the adjusting assembly, a servo motor is arranged on one side of the fixing plate, a threaded rod is rotationally installed at the output end of the servo motor through a coupler, a limiting sleeve is arranged on the fixing plate, a sliding sleeve is arranged on the threaded rod, a movable support is arranged on the sliding sleeve, and a movable support is arranged on the movable support. A movable support is arranged on the base, a supporting rod is arranged on the movable support, a hinge is arranged at one end of the supporting rod, a treatment mechanism is arranged on one side of the base, a treatment tank is arranged in the treatment mechanism, an air inlet is formed in one side of the treatment tank, and filter cotton is arranged in the treatment tank.

A blow valve 15 and a biomass processing system 1 comprising such a blow valve Said blow valve 15 being connectable in a blow line 7 which is connecting two differently pressurized vessels 3, 5 of the biomass processing system 1. Said blow valve 15 is configured for controlling the flow of biomass material and fluid in the blow line 7, wherein said blow valve 15 comprises a shutter valve 31 with a central opening 33 of controllable size, said shutter valve 31 comprising a number of valve plates 35 which are disposed in an annular pattern surrounding the central opening 33 of the shutter valve 31 and wherein said valve plates 35 are movable in relation to each other whereby the size of the central opening 33 is controlled by moving the valve plates 35.

The invention relates to a method for conveying a material to be conveyed into or out of an overpressure zone (1), wherein the material to be conveyed is conveyed into and / or out of an overpressure zone (1) by means of a stuffing screw (2) and compressed to form an airtight and liquidtight plug, which seals the overpressure zone (1). The invention is characterized in that the sealing of the plug is controlled by the relative positioning of the screw (6) and the plug tube (8). The invention relates to a device for carrying out the method and enabling optimal control of the sealing of the overpressure zone (1).

The utility model discloses a poplar chemi-mechanical pulp i-CTMP pulping system which comprises a steaming bin, a metering spiral scale is arranged at an outlet in the bottom of the steaming bin, the output end of the metering spiral scale is communicated with a reversing conveying structure, the output end of the reversing conveying structure is communicated with a spiral feeder, the output end of the spiral feeder is communicated with a transverse pipeline of a T-shaped pipe, and the transverse pipeline of the T-shaped pipe is communicated with a horizontal pipeline of the T-shaped pipe. A non-return structure is arranged in the transverse pipeline, a vertical pipeline of the T-shaped pipe is communicated with the high-temperature softening pipe, the output end of the high-temperature softening pipe is communicated with the balancing bin H, and a side feeding spiral conveyor is arranged at a side output port of the balancing bin H. The metering spiral scale conveys materials conveyed by the steaming bin into the spiral feeder through the reversing conveying structure, the materials are extruded into material plugs in the spiral feeder, the material plugs are conveyed into the T-shaped pipe, then the material plugs enter the high-temperature softening pipe to be subjected to high-temperature steaming and softening, the softened material plugs enter the balancing bin, and chemical medicines are pre-placed and subjected to high-temperature softening, so that the quality of the chemical medicines is improved. And the pulping energy consumption of the subsequent high-concentration pulping machine is reduced.

The invention discloses novel insulation paper and a preparation method thereof. The novel insulation paper comprises the following raw materials in parts by weight: 60-65 parts of flame-retardant bamboo pulp; 15-20 parts of waste paper regenerated fiber; 8 to 10 parts of modified montmorillonite; 5-8 parts of a zinc borate compound; 3-5 parts of glycerol ester of rosin; 1 to 2 parts of polyvinyl butyral; the invention relates to the technical field of insulation paper. According to the novel insulation paper and the preparation method thereof, through cooperation of the flame-retardant bamboo pulp, the waste paper regenerated fibers, the modified montmorillonite, the zinc borate compound, the rosin glyceride and the polyvinyl butyral, the low-cost requirement is ensured by utilizing regenerated materials, the breakdown field strength of the insulation paper is improved, the thermal aging life of the insulation paper is prolonged, and the limit oxygen index of the insulation paper is increased; the insulation paper has the advantages that the insulation paper is simple in structure, use reliability is guaranteed, the problems that natural fiber insulation paper is prone to moisture absorption and low in strength are solved, good flame retardance and surface hydrophobicity are achieved, and effective support is provided for light-weight and high-efficiency development of transformers.

The invention provides bamboo reed bleached fluff pulp as well as a preparation method and application thereof, and belongs to the field of papermaking. According to the characteristics of low bonding strength and small bursting strength of the arundo donax short fibers and parenchyma cells, the use of chemicals such as a debonding agent and the like is canceled, the preparation process is different from a traditional bamboo fluff pulp preparation process, the components of the arundo donax short fibers are reserved, the three-dimensional structure of the arundo donax bleached fluff pulp fibers is optimized, the water absorption and water retention capacity of the fluff pulp is improved, and meanwhile, the paper pulp yield is optimized. According to the raw material characteristics of the bamboo reed, the process conditions of prehydrolysis, cooking and bleaching are optimized, and an economical and efficient bleached fluff pulp product of the bamboo reed pulp is produced, so that the method has good practical application value.

A ragger system for removing solid debris from a pulper vessel of a pulping system is disclosed. The ragger system includes a ragger operable to pull a tail of solid debris from the pulper vessel. The ragger includes a puller mechanism, a puller drive, a rider roll, and a pressure device to adjust a pressure of the rider roll on the tail between the puller mechanism and the rider roll. The ragger system includes a measurement device for determining attributes of the tail, operating conditions of the pulping system or ragger, or combinations of these. The ragger system includes a control system that measures input variables with the measurement devices, determines the attributes of the tail or operating conditions from the input variables, and adjusts a withdrawal rate, pull direction, pressure, rider roll torque or speed, or combinations thereof to maintain continuity of operation of the ragger.

A reaction chamber for continuous chemical processing of fibrous material, comprising: an elongate cavity having first and second ends at opposite ends of the elongate cavity and configured to contain the fibrous material and any reagents added to it for chemical processing; an input section at the first end of the elongate cavity, configured to feed fibrous material into the first end of the elongate cavity; an output section at the second end of the elongate cavity, configured to output fibrous material from the second end of the elongate cavity; and a transporter configured to drive fibrous material from the first end to the second end of the elongate cavity.

The invention relates to the technical field of high polymer material production, and discloses a digesting and mincing device for waste paperboard recycling, which comprises a supporting foot stool, the top end of the supporting foot stool is connected with a protective shell, a stirring cylinder is rotatably arranged in the protective shell, a crushing cylinder is rotatably arranged in the stirring cylinder, and a crushing device is arranged in the crushing cylinder. A double-layer filter screen is arranged on the surface of the stirring barrel, and a first sealing bearing is connected between one side of the double-layer filter screen and the protective shell. According to the invention, rotation of the stirring cylinder, rotation of the crushing cylinder and action time sequence of each component are respectively controlled, so that the waste paperboard processing requirements of different batches and different states can be flexibly adapted, accurate control of digestion time, stirring strength, crushing strength and cleaning process is realized, and adaptability and controllability of the process are enhanced.

The invention relates to equipment for cotton pulp production, which comprises a pre-soaking unit arranged on a floor slab C and used for pre-soaking cotton materials, a distributing unit used for transferring the pre-soaked cotton materials, and a cooking ball arranged on the floor slab B and used for cooking the cotton materials, the floor slab C is a floor slab on the upper layer of the floor slab B, and a vacant material opening is formed in the floor slab C; a material guide device is arranged at the vacant material opening, the cooking ball is rotationally installed, a material opening part for feeding and discharging cotton materials is arranged on the cooking ball, the material guide device is movably installed, the material guide device has a B1 state and a B2 state, and the B1 state is that the material guide device is used for guiding the cotton materials into the cooking ball from an outlet of the material distributing unit, and the B2 state is that the material guide device is used for guiding the cotton materials into the cooking ball from an outlet of the material distributing unit; and in the B2 state, the material guide device avoids the rotation of the cooking ball. According to the technical scheme provided by the invention, the guide device with the adjustable state is arranged, and the guide device guides and conveys the cotton material while feeding the cotton material into the cooking ball, so that the situation of leakage of the cotton material is avoided.

The firework paper heat recovery device comprises a digester body and a pot cover, the digester body is covered with the pot cover in a sealed mode, the pot cover is provided with a plurality of stirring and pressure adjusting mechanisms, and each stirring and pressure adjusting mechanism comprises an adjusting cylinder installed at the bottom of the pot cover and a piston stirring rod inserted into the adjusting cylinder; the piston stirring rod is provided with a stirring blade, a piston block and a supporting block, the piston block is installed in the piston cavity, the piston block and the side wall of the piston cavity are sealed in an attached mode, the stirring blade is installed on the part, inserted into the digester body, of the bottom end of the piston stirring rod, and the supporting block is provided with a plurality of annular balancing weights arranged on the piston stirring rod in a sleeving mode; waste heat of high-temperature cooking is conveyed into the steam generator in a steam mode, waste heat recovery is carried out, and the utilization rate of heat energy is increased. By arranging the structures such as the piston stirring rod and the adjusting cylinder, the stirring blades are driven to move to scatter slurry in the digester, so that the materials are prevented from sinking and accumulating, and the reaction efficiency is improved.

This invention provides a biomass pretreatment method using a steam-coupling twin-screw extruder, along with cellulose-containing biomass and its applications. The biomass pretreatment method includes the following steps: sequentially subjecting pre-softened biomass raw materials to steam treatment and twin-screw extrusion crushing to obtain biomass particles; the biomass particles are then subjected to a cooking reaction to obtain cellulose-containing biomass. This invention utilizes the synergistic effect of steaming and twin-screw extrusion crushing to overcome the mass transfer resistance of dense wood with low energy consumption, aiming to solve the problems of dense forest biomass structure, high energy consumption in traditional pretreatment methods, and difficulty in chemical penetration. This process can effectively reduce the amount of chemicals used to achieve efficient and directional separation of components, fully adapting to the needs of low-cost, continuous industrial production.

The application discloses a preparation method of light fireproof sound-absorbing fiberboard and relates to the technical field of fiberboard materials.The method comprises the following steps: washing, cooking, hot grinding, adding black dye, adding a fire retardant, adding azodicarbonamide as an additive, spraying, hot pressing, and sawing.The temperature of the spraying is controlled within 100-110 DEG C, and the spraying amount is controlled within 30-50 kg / h.The fiberboard prepared by the method has a single-layer structure, has good sound-absorbing effect, does not need to be matched with sound-absorbing materials, can be thinnest to 9 mm, reaches the national fireproof B1-B level standard, and can reduce the density of the board to 600-700 kg / m 3 , so as to achieve the purpose of lightening.

There is provided a crushed piece supply device including a storage tank that stores a crushed piece containing a fiber, a partition portion that partitions an inside of the storage tank into a first space and a second space positioned below the first space by narrowing the inside of the storage tank, an adjusting section that adjusts a moving amount of the crushed piece moving from the first space to the second space, a stirring section that stirs the crushed piece in the second space, and a discharge port through which the crushed piece is discharged from the second space.

A method of digesting lignocellulosic material includes mixing lignocellulosic material comprising lignocellulosic biomass, a polymeric naphthalene sulfonate, sodium xylene sulfonate, and a white liquor comprising sodium hydroxide and sodium sulfide to form a mixture. In addition, the method further includes heating the mixture to digest at least a portion of the lignocellulosic material.