135results about How to "Increase pulp yield" patented technology

The invention relates to a preparation method of paper pulp, and further relates to a method for preparing the paper pulp through a biological enzyme method. The technical scheme is that the method comprises the following steps of: one, segment cutting; two, puffing; three, heat preservation fermentation; four, shoving; five, pulp washing; six, pulp selecting, wherein screened out coarse residues are put into the step three for fermentation again; seven, pulp grinding; and eight, screening, wherein the screened out pulp residues are put into the step seven for pulp grinding again. Compared with the prior art, the method has the advantages that the pulping and papermaking through the biological enzyme method has the characteristics of 'three highs and three lows' compared with the conventional process technology.

The invention relates to a method for boiling high concentration pulping in normal pressure or low pressure by an alkaline method with zero residual alkaline, and the method comprises adding accelerating agent in the boiling process and utilizing a double screw to rub and squeeze a pulper, leading pulp making and boiling process with an alkaline method to go on in normal pressure or low pressure, and leaving no residual alkaline in black liquor, leading pulp to always keep a higher density in the pulping process of boiling, washing and bleaching, and the pulp which is prepared can meets the requirement of paper making. Accelerating agent chooses one or a plurality of magnesium hydrate, potassium hydrate, sodium metasilicate, sodium sulfide, sodium sulfite, ammonium sulfite and carbamide. Special-purpose pulping boiling equipment and high-pressure boilers are not needed by pulping paper mills through utilizing the invention, in the process of pulping, pulp always keeps higher density, and black liquid has high density, little numbers and low energy consumption, alkaline recovery project with great investment is not needed to be built, and the invention enables black liquid to prepare fertilizer or other chemical products with high quality, and the invention is suitable for popularizing and applying.

The invention discloses a pulp making method for discharging sewage thoroughly which includes the following steps: pulping material, steam cooking agent and catalyst are mixed evenly and put into a spherical digester and the mixture is cooked by steam; the cooked material is squeezed by passing through a plurality of twin-screw extruders connected in series so as to extract black liquid and obtain the pulp material, and the black liquid obtained from the last twin-screw extruder is squeezed sequentially after returning to the former twin-screw extruder, while the black liquid obtained from a first and a second twin-screw extruders is merged straightly, and the merged black liquid is concentrated and dried to obtain alkali lignin and or lignosulfonate; the pulp material is delivered into a twin-screw rubbing and kneading pulper, the polyester washing is carried out in multiple-section series while the pulp is grinded, or the polyester washing is carried out in multiple-section series and bleached in multiple-section series, the washing water is returned to the washing process in the former section, and finally the residuary black liquid is obtained, that is the washing water coming from the first washing process; then, the residuary black liquid is returned to the pulping material or the spherical digester; the pulp material is refined in a dual-disk refining machine by adding water, then a pulp plate is made after the refined pulp material enters a paper machine. Meanwhile, the removed water circulates to the dual-disk refining machine or other processes needing the water by the pure water treatment.

The invention provides a biological pulping method adopting crop straw and papermaking pulp and belongs to the technical field of pulping. The biological pulping method comprises crop straw cutting, primary treatment with bio-enzyme, grinding, secondary treatment with a microbial agent and bleaching. During primary treatment of with the bio-enzyme, an adopted complex bio-enzyme preparation comprises lignin peroxidase, xylanase, laccase, pectinase and pulping enzyme in the mass ratio being (2-4):(1-2):(1-2):(1-2):(1-2), and the technical problem that traditional pulping methods exert enormous pressure on the environment is relieved. By means of the biological pulping method adopting crop straw, emission of wastewater and waste gas is reduced, energy consumption is reduced, the pulp yield and the whiteness are increased, the crop straw can be changed into wealth, and the method has great significance in energy conservation, emission reduction and low-carbon economy.

The invention belongs to the field of papermaking and discloses pectobacterium carotovorum and applications thereof in bio-pulping. The pectobacterium carotovorum subsp. carotovorum C519 is preserved in China General Microbiological Culture Collection Center with a preservation number is CGMCC No. 3350. The strain can grow under the condition of high alkalinity (pH11), is suitable for degumming process of plant bast fibers and can be used for biological paper pulp. The C519 (CGMCC No. 3350) can grow under an alkaline condition (pH9 to pH 11), and secretes basophilia pectin with high activities (an appropriate pH value is between 8 and 10). Other general microorganisms are difficult to grow and breed in the range of alkalinity, so that the strain can avoid being polluted by other competitors. Moreover, cellulose has no activities under the alkaline condition, thus the strain greatly keeps the original performance of the bast fibers and improves yield.

The invention relates to a food wrapper and a manufacturing method thereof. Burst index of the food wrapper is not lower than 3kPa.m/g, longitudinal tensile strength thereof is not lower than 3.0KN/m, lead content thereof is not higher than 5.0mg/kg and arsenic content is not higher than 1.0mg/kg; decoloring testing proves negative; fluorescent matter is not contained; pathogen can not be detected; whiteness of the wrapper ranges from 20% to 30%; the wrapper is brown; the manufacturing method comprises the following steps: DDS displacement cooking, washing screen, oxygen delignification and hydrogen peroxide bleaching are carried out on wood fibrous material to be prepared into micro-bleach pulp with a whiteness of 22% to 36%; beating, desanding, flovoring, fine sizing by a pressurized screen, wiring and moulding, pressing, drying, reeling, rewinding and packaging are carried out on the pulp, thus obtaining the food wrapper.

The invention belongs to the field of biological pulping and provides straw cellulose. The straw cellulose is characterized in that straw stalk fiber cut and separated by enzyme molecules directionally is well preserved, the result that fine fiber is damaged in the traditional chemical pulping is overcome, the length-weight average value is 0.70 to 1.10 mm, and the quality-weight average value is1.10 to 1.40 mm. The invention further provides straw fiber. The straw fiber comprises the fiber structure of the straw cellulose; the quality of the straw stalk fiber is as follows: the brightness (whiteness) is 57 to 75 percent, the hardness is 7 to 26 K, the folding resistance is 30 to 78 times, the tearing index is 3.0 to 5.5 mN.m<2>/g, and the tensile index is 41.0 to 62.0 N.m/g. The invention further provides a process for separating fiber from straws and application of the straw fiber. High-temperature chemical cooking black liquid is not generated in the production process, the fiber quality (length, whiteness, short fiber content and the like) is obviously more excellent than the quality of the traditional chemical pulping, the pulp yield is increased by 25 percent or higher whenbeing compared with that of the traditional chemical pulping rate, and water consumption and energy consumption in the production process are reduced by 30 percent or higher when being compared with those of the traditional chemical pulping.

The invention relates to a paper making pulp manufacture method which includes that the fiber material after dipped is arranged into a cylinder; the material rotates at a high speed between a rotary shaft and the inner wall of the cylinder under the action of the rotary shaft; the material generates high temperature high pressure phase transition under kneading and extruding; pressure is released suddenly at the discharge opening of the cylinder to lead the cylinder to blow up, thus finishing fiber dissociation and fibrillating; the pulp is extruded out from the discharge opening. The paper making pulp manufacture device includes a main motor body and a motor. A feed opening is arranged on the main motor body; the cylinder is arranged on the main motor body; a spiral shaft is arranged in the cylinder; one end of the spiral shaft is connected with the motor; the shaft rod of the spiral shaft is a conical structure with a diameter gradually increasing from the feed opening to the discharge opening; a spiral slot is arranged on the inner wall of the cylinder; the depth of the spiral slot is decreased gradually from the feed opening to the discharge opening. The invention finishes the fiber dissociation and fibrillating during the pulp manufacture process and has the advantages of low energy consumption and no pollution.

This invention involves a papermaking active pulp making, belongs to the papermaking technology. It is composed by the active ingredient, the host medicinal preparation and the auxiliary medicinal. The active ingredient components is: propyl butyl-carbinol polyethyleneoxide ether, oxidized polyethylene emulsion, ethyl alcohol, lauryl benzene sulfonic acid sodium, sodium monoperoxy, alkalinity proteinase and talcum powder; The main medicinal preparation's components is: calcium hydroxide, anthraquinone, sodium monoperoxy, lauryl benzene sulfonic acid sodium, anhydrous sodium sulfite and talcum powder; The auxiliary medicinal preparation's ingredient is: alkalinity proteinase, sodium monoperoxy and talcum powder; Mix the active ingredient, the host medicinal preparation and the auxiliary medicinal preparation. This invention's papermaking active system paste, may not use the alkali, does not need the massive laundering, has avoided the sewage emissions, greatly economize on water. Its thick liquid rate compares with the strong alkali method, may enhance 20%. The use of industrial chemicals is greatly reduced, and so on.

The invention provides a treatment method of wood fiber raw materials, which includes the following steps: (1) pre-impregnation: impregnating the wood fiber raw materials in a Na2CO3 water solution; and (2) steam-boiling: steam-boiling the impregnated wood fiber raw materials with an organic acid water solution as a steam-boiling solvent with addition of an inorganic acid as a catalyst. In the invention, by means of synergistic effect between the pre-impregnation with the Na2CO3 water solution and the steam-boiling of the organic acid water solution and the inorganic acid, yield of paper pulp is increased, ash content is reduced and comprehensive performance of the paper pulp is improved.

The invention belongs to the technical field of reconstituted tobacco, and specifically relates to natural-color bamboo pulp for a reconstituted tobacco additive and a preparation method thereof. The method is characterized in that bamboo is used as the raw material and subjected to preparing, stewing, squeezing extrusion, dipping, pulping and papermaking to obtain a high-purity product. The physical performance indexes of the natural-color bamboo pulp are that the tensile index is 35-45N-m/g; the burst index is 2.5-3.5kPa-m<2>/g; the tearing index is 6.5-9.5mN-m<2>/g; the intrinsic viscosity is 800-1000mL/g; the whiteness is 30-40% ISO; the pentosane is less than 8%; the ash content is less than 1.0%; the bulk is 5.0-8.5cm<3>/g. The prepared tobacco slices are added to finished cut tobacco based on ratio; the prepared cigarette is capable of supplying more air intake quantity while smoking, so that the cigarette can be promoted to completely burn, and the quantity of pyrolysis products under oxygen-poor condition can be effectively decreased, and as a result, the releasing quantity of harmful components such as tar and nicotine can be decreased.

The invention provides tape base paper and a production method thereof. As for the tap base paper, the fracture length is more than or equal to 6.0km; the tensile strength is more than or equal to 1.5kN/m; the moisture content is within the range of 7-10%; the tightness is more than or equal to 0.62g/cm<3>; the wet strength is more than or equal to 0.33kN/m; and the whiteness is within the range of 17-25%. The production method of the tape base paper comprises the following steps: carrying out low-energy consumption displacement cooking, oxygen-alkali delignification and hydrogen peroxide bleaching processes on a wood fiber raw material to produce micro-bleaching pulp, wherein the whiteness of the bleached pulp is 19-27%, the beating concentration of the bleached pulp is 2.5-4.5%, the beating degree of the bleached pulp is 26-32 degree SR, and the wet weight of the bleached pulp is 10.5-15g; and the pulp is formed by beating, degritting, adding a wet strength agent, carrying out fine screening with a pressurized screen, forming on a mesh, squeezing, drying, reeling, rewinding, and packaging.

The invention relates to a soybean milk machine, aiming at overcoming the shortcomings of an existing soybean milk machine which is low in milk and dreg separation efficiency, high in personnel participation and high in soybean milk residue in separated bean dregs during making milk. The soybean milk machine comprises a cup body, a milling motor arranged in a cavity formed by an upper cover and a lower cover on a machine head, and a circuit controller, wherein a cutter shaft extends into the machine head from the lower cover and is connected to the milling motor, and the lower end is fixedly connected to a blade; a filter cup and a filter cup driving motor are arranged inside the cup body, and the blade is arranged inside the filter cup; the mouth of the filter cup is sleeved on the lower cover, and the mouth of the filter cup is in interference fit to the lower cover; a rotating pivot is arranged at the bottom of the filter cup; and a milk discharging valve communicated to inside and outside of the cup body is arranged at the bottom of the cup body. The soybean milk machine disclosed by the invention can be used for carrying out and achieving milk and dreg separation after boiling the milk, so that soybean milk residue in the separated bean dregs is low and milk yield is high; and during milling and extracting the milk, soybean milk producing materials are limited in the filter cup in a relatively concentrated mode, so that milk grinding and extracting speed is improved.

The invention relates to corncob bark pulp for chemical fiber, which is prepared and formed from corncob bark by the working procedures of pretreatment, stewing, washing, pulping, pre-selection desanding, concentration, chlorine alkalization, bleaching, acid treatment, scouring, post-selection desanding, concentration and paper manufacturing with pulp; in the corncob bark pulp, the content of alpha-cellulose is larger than or equal to 90%, the content of ash content is smaller than or equal to 0.10%, and the content of iron content is smaller than or equal to 25 mg/kg; the stewing is performed by using sulfate process, and the stewing condition manner and bleaching conditions are improved; and the quality indicator of the corncob bark pulp obtained through the method is more prior to thatof the pulp for the conventional viscose staple fiber, and the pulp yield is high. The invention achieves the purpose of producing the pulp for viscose fiber by using agricultural waste of the corncob bark pulp, and eases the problem of the shortage of materials of the viscose fiber.

The invention provides a sea buckthorn pulping method which adopts mechanical pulping technique; with the method, raw material has wide sources, and a mechanical environment-friendly pulping mode without adding alkali and other chemical substances is adopted; the pulp yield rate reaches 76.5 to 82.5 percent and no pollution produces in the production process.

The invention belongs to the field of bio-pulping, provides wheat straw cellulose, and aims at storing straw fibers which are subjected to directional cutting and separating by enzyme molecules and overcoming the result of damage to fine fibers in traditional chemical pulping. The wheat straw cellulose is 0.80-1.10mm in average length based on length-weight ratio and is 1.20-1.50mm in average length based on mass-weight. The invention also provides wheat straw fibers comprising the fiber structure of the abovementioned wheat straw cellulose. The quality of the wheat straw fibers meets that thebrightness (whiteness) is 53-75%; the hardness is 8-26K; the folding strength is 30-75 times; the tearing index is 3.3-5.5mN.m<2>/g; and the tensile index is 45.0-62.0N.m/g. The invention also provides a wheat straw fiber separating technology and application of the wheat straw fibers. According to the technology, high-temperature chemical boiling black liquid is not produced in the production process; the fiber quality (length, whiteness, short fiber content, etc.) is obviously superior to that of traditional chemical pulping fibers; the pulp yield is increased by more than 25% by being compared with traditional chemical pulping yield; the water consumption and the energy consumption in production are decreased by more than 30% by being compared with those in traditional chemical pulping.

The invention discloses a combined process using grasses as raw materials. The combined process is a whole-process reaction process comprising a preparation process of a high-grade paper slurry, a preparation process of a pulp for packaging paper, and a preparation process of a foliar fertilizer. The preparation process of the high-grade paper slurry mainly includes the process steps of: three reactions in three reaction tanks, four times of extrusion and pulping by a high concentration pulping machine; and the slurry with high yield is prepared. Pulp squeezing water obtained by first alkali addition softening, first pulp squeezing and/or first two times of pulp squeezing in the preparation process of the high-grade paper slurry is used as a raw material for the preparation process of thepulp for packaging paper; the pulp squeezing water containing a part of cellulose and unreacted agents is subjected to softening and grinding treatment to obtain the slurry for packaging paper. Squeezing water produced in the preparation process of the pulp for packaging paper is recovered and treated as a raw material for preparation of the foliar fertilizer. The combined process has the advantages of no black liquor discharge, water recycling, and energy conservation; therefore, the combined process is a green pulping process.

The invention provides an unbleached pulp, and a preparation process, an application and a preparation device of the unbleached pulp, and relates to the technical field of pulping by utilizing a straw. The choices for the raw material of the unbleached pulp are wide, a wheat straw, a rice straw, a reed straw or a waste wood chip are used efficiently as the pulping raw material, so that the pulping cost is obviously lowered. The preparation process of the unbleached pulp uses the new technique to replace steam heating to soften the raw material, the problem of a pulp black liquor existing in the pulping process is solved while the heating cost is obviously reduced. The flow of the production process is simplified, the electricity and the water are efficiently saved, the resource utilization rate is effectively increased, and the production of no wastewater or waste materials is guaranteed in the production process. The special production process is used to pulp, the beating degree is high, the quality is better, the performance of a pulp product is stable, the pulp product is widely applied to the functional degradable material, and the functional applicability and the material quality are obviously strengthened in the application fields of preparation of corrugated paper, industrial packaging materials, preparation of plates, and preparation of tableware.