3778 results about "Pulp and paper industry" patented technology

The invention relates to the technical field of packaging, in particular to an intelligent metering method for remnant base paper rolls of a corrugated paper board assembly line. The intelligent metering method for the remnant base paper rolls of the corrugated paper board assembly line comprises steps as follows: a plurality of base paper feeding positions are arranged in the conveying direction of the assembly line at intervals, a base paper feeding frame is arranged in each base paper feeding position, and two base paper feeding rolls located on two sides of each base paper feeding frame are arranged on the base paper feeding frame; each base paper feeding roll is provided with lap recording sensors and incremental encoders, the lap recording sensors are used for monitoring the number of paper feeding laps of base paper clamped on the corresponding base paper feeding roll, the incremental encoders are used for monitoring the length of each lap after the base paper on the base paper feeding roll passes by one lap, and the lap recording sensors and the incremental encoders are connected with a controller. Intelligent metering can be realized, the operation cost of an enterprise is reduced, labor is saved, and the utilization rate of enterprise resources is increased.

The invention relates to a high-utilization-rate RAP asphalt regenerant and a preparation method thereof. The regenerant comprises the following components in percentage by mass: 30%-50% of a petroleum-based softener, 10%-20% of biomass oil, 5%-15% of a polymer modifier, 1%-5% of a surfactant, 0.5%-2% of an antioxidant and 2%-10% of a functional additive. All the components have a synergistic effect, so that the asphalt modifier can effectively permeate aged asphalt, supplement light oil, reduce viscosity, recover flexibility and remarkably improve high-temperature rut resistance and low-temperature crack resistance of regenerated asphalt. By reasonably selecting the raw materials and proportioning, the production cost is reduced, the RAP utilization rate is improved, and the environment-friendly raw materials are adopted, so that the requirements of environmental regulations are met. The result of the embodiment shows that after the regenerant is added, the performance recovery of the aged asphalt is good, the viscosity of the regenerated asphalt mixture is moderate, the needle penetration recovery rate is high, the softening point is high, the ductility is large, the comprehensive performance is excellent, and the regenerant is superior to commercially available products.

The present invention discloses a tensile and wear-resistant washed kraft paper and its preparation process, which relates to the technical field of kraft paper. The process includes the following steps: Step 1: Add color paste, waterborne acrylic resin, preservative, reinforcing agent, softening agent, curing agent, and waterproofing agent into a solvent in sequence and stir evenly to obtain a sizing slurry; Step 2: Coat the sizing slurry on the base paper, and successively perform extrusion, ultraviolet light irradiation, first drying, ironing, and second drying to obtain the tensile and wear-resistant washed kraft paper. In this application, by preparing specific reinforcing agent and waterproofing agent and introducing them into the sizing slurry for sizing, the interfacial action between the sizing slurry and the base paper is effectively improved, thereby improving the tensile and wear resistance of the washed kraft paper while enhancing the flame retardant performance; it can achieve the purpose of replacing plastic, leather, and cloth with paper.

The invention discloses a wastewater degradation and recovery device for white spirit production, and particularly relates to the technical field of wastewater degradation, the wastewater degradation and recovery device comprises a treatment tank and an impurity storage box arranged on one side of the surface of the treatment tank and used for collecting impurities after wastewater treatment, and the other side of the treatment tank is further provided with an input and output assembly; sealing plates for isolating wastewater are arranged on the upper side and the lower side of an inner cavity of the treatment tank respectively, a sealing column is arranged on the opposite surfaces of the two sealing plates, a liquid storage tank is arranged on one side of the sealing plate located on the upper portion, and an air injection stirring assembly is arranged at the bottom of the sealing column. According to the wastewater degradation and recovery device for white spirit production, the mode that large bubbles are directly injected and scattered by a rotary stirring rod to form small bubbles is achieved through the arranged air injection stirring assembly, and meanwhile the injection mechanism is matched for synchronous operation, so that a flocculating agent is rapidly dispersed by means of bubble kinetic energy and the stirring effect, and the flocculation reaction is accelerated; the pollutants can be more quickly coagulated into large-particle flocs, and the wastewater purification efficiency is improved.

The invention discloses a continuous turning and discharging compost fermentation device and a treatment method thereof, and belongs to the technical field of compost ferment.The continuous turning and discharging compost fermentation device comprises a compost fermentation tank, and a compost feeding mechanism, a fermentation assisting mechanism and a continuous collecting mechanism are sequentially arranged on the compost fermentation tank from top to bottom. Through cooperation of the feeding hopper and the collecting hopper, a continuous feeding and discharging mechanism is constructed, and after being covered by bacterial powder in the dust box, an input new material is mixed with a semi-cured material to form a strain relay transmission mode, so that the operation efficiency of the compost fermentation tank is effectively improved, the material turning and discharging continuity of the compost fermentation tank is improved, and the labor intensity of workers is reduced. And external air introduced through the ventilation window can reduce the temperature gradient of the semi-finished fertilizer and preheat the newly fed material by using the waste heat of the pile body, so that the overall energy consumption of the device is reduced, the inactivation of mesophilic flora due to local overheating is avoided, and the activity of the fermentation bacterial colony in the fermentation process is remarkably improved.

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 relates to the technical field of concrete product production, in particular to a residual slurry circulation formula, which comprises the following components by weight: 350-450kg / m < 3 > of cement; sand grains are 750-800 kg / m < 3 >; stone blocks are 900-1000 kg / m < 3 >; the residual slurry is 200-300kg / m < 3 >; 8.5-10.5 kg / m < 3 > of a water reducing agent; 80-85 kg / m < 3 > of water; and 20-25 kg / m < 3 > of an enhancer. According to the prepared residual slurry circulation formula, the residual slurry is mixed with new cement, active substances in the cement are supplemented, then sand grains and stones are added as aggregates and fill gaps, and sodium gluconate and silica fume are used in a matched mode, so that the water consumption is reduced, meanwhile, the mechanical strength of the recycled residual slurry after solidification is improved, and the service life of the residual slurry is prolonged. The residual slurry can be cyclically put into the production process, and the method has the beneficial effects of being environment-friendly and reducing the production cost.

The invention relates to the technical field of sewage treatment, in particular to a method for improving the denitrification nitrogen removal performance of a corn or rice straw fermentation carbon source by using industrial glucose. According to the method, the straws are soaked and pretreated by adopting calcium peroxide, and meanwhile, in the anaerobic fermentation process, the anaerobic condition is kept through nitrogen, and zero-valent iron is added to obtain the straw fermentation liquor. Fermentation liquor and industrial glucose are mixed to serve as a composite carbon source, the activity of microorganisms in a sludge system is stimulated through the usability of the glucose, and the utilization rate of the microorganisms to the rice and corn fermentation liquor carbon source is increased; anaerobic fermentation conditions of rice and corn straws are optimized, the carbon source release rate is increased, the complexity of carbon source composition of fermentation liquor is utilized, the diversity of microorganisms is improved, excessive propagation of the microorganisms is avoided, and the biological denitrification capacity is improved. The method disclosed by the invention is beneficial to resource utilization of agricultural wastes, reduces the biological denitrification cost of sewage with a low carbon-nitrogen ratio, and promotes green and low-carbon development of sewage treatment.

The invention discloses a continuous bamboo fiber preparation method, and belongs to the technical field of bamboo fiber preparation. The blasted bamboo wood is subjected to enzymolysis; the bamboo wood subjected to enzymolysis is conveyed into a separator to be continuously separated, and fiber bundles are obtained; preparing a fiber suspension from the fiber bundles, and screening to obtain purified fiber bundles; the purified fiber bundles are drafted; freezing the drafted fiber bundles, then unfreezing the fiber bundles, and then drying the fiber bundles to obtain the continuous bamboo fibers. By adopting the continuous bamboo fiber preparation method disclosed by the invention, the bamboo fibers with excellent performance, high purity and good uniformity can be prepared, the problems of poor fiber quality, insufficient stability and the like existing in a traditional method are effectively solved, the production efficiency can be improved, the environmental pollution and energy consumption are reduced, the production cost is reduced, and the method is suitable for industrial production. And high performance, continuity and green economy are considered.

The invention belongs to the technical field of wastewater treatment and energy recovery, and provides a regulation and control method for promoting anaerobic acid production by taking soybean molasses as a substrate through cooperation of ferroferric oxide and bamboo charcoal. Soybean molasses is used as a substrate carbon source, anaerobic activated sludge is inoculated in a medium-temperature SBR reactor, the volume ratio of reactor inflow sewage to sludge is 2: 1, ferroferric oxide and bamboo charcoal composite conductive particles which are subjected to ball milling treatment and have the concentration of 1 g / L are added to promote an anaerobic fermentation system to produce acid, and then anaerobic fermentation is carried out. The mass ratio of ferroferric oxide to bamboo charcoal in the ferroferric oxide and bamboo charcoal composite conductive particles is (1: 2)-(2: 1); monitoring the acid yield, the pH value change and the product type; and the variety and concentration of the acid-producing substance are analyzed, and the interaction of all the components in the reaction process is evaluated. The acid production rate and the total acid production amount in the anaerobic acid production process are obviously improved. And the activity of anaerobic flora is promoted. The variety distribution of acid-producing substances is obviously optimized, and the stability of the acidification process is improved.

The application discloses a method for improving the quality and moisture content distribution of bean curd by soaking and using water for pulp grinding, and comprises the following steps: (1) pretreatment: accurately weighing CaCl2, MgCl2, KCl and cellulase according to different proportions, dissolving in deionized water, and preparing for use; (2) adjusting pH value: taking sodium bicarbonate, dissolving in the prepared deionized water, and adjusting the pH value; (3) raw material preparation: weighing 500g of yellow beans, pouring into the prepared deionized water in step (2), and soaking for about 8-10h; (4) bean curd preparation: preparing the bean curd product rich in various ions according to the process flow by using the soaked yellow beans. The application has the advantages of simple process, low production cost and suitability for industrial production, and solves the problem that the quality of bean products is different due to different water qualities in different regions for yellow bean processing enterprises.

The invention relates to the technical field of wastewater treatment, and provides a treatment method of glycine production wastewater. The treatment method of glycine production wastewater comprises the following steps: (1) rectifying glycine wastewater to recover methanol, adding dilute sulphuric acid to adjust the pH value to 2.5-3.0, stirring, and standing; (2) transferring the supernate into another container, adding a ZIF-8 modified material, stirring, standing, filtering, collecting filter residues and filtrate, washing the filter residues with diethyl ether, and recovering urotropine; and (3) evaporating and concentrating the filtrate under the vacuum condition of-0.08 MPa and the temperature of 50-60 DEG C, and separating out high-purity ammonium chloride crystals. According to the treatment method for the glycine production wastewater, the problem that an existing treatment method is poor in removal effect on urotropin in the glycine production wastewater is solved; and the treated glycine production wastewater reaches the discharge standard.

The invention discloses a textile drying device for textile processing, and relates to the technical field of textile drying. The device comprises a supporting frame, and a first frame body and a second frame body which are matched for use are fixedly mounted at the top end of the supporting frame; through cooperative use of the water removal mechanism and the treatment mechanism, a first extrusion roller and a second extrusion roller can be driven to synchronously rotate reversely, so that wastewater adsorbed in the to-be-dried textile can be extruded and discharged; in addition, external cold air can be continuously sucked into the second frame body after being filtered, the sucked air is heated and then guided to the to-be-dried textile subjected to extrusion and drainage, then the textile subjected to extrusion and drainage can be rapidly dried, and therefore the drying efficiency of the textile is effectively improved. And the continuously sucked external cold air can cool the dried textile, so that the phenomenon that the textile is damaged due to heat accumulation caused by overheating and winding of the dried textile can be avoided.

The invention discloses a passion fruit pulp separation system and method, and belongs to the technical field of agricultural product processing. The system aims to solve the technical problems of incomplete separation of pulp and peel, more pulp residues, low yield, low efficiency and the like in the traditional modes of manual digging, mechanical scraping or hydraulic impact and the like. Comprising a discharging channel through which passion fruits pass one by one; the puncturing and stirring unit is arranged on the side of the discharging channel and comprises a puncturing rod piece, a stirring part arranged on the puncturing rod piece in a sleeving mode, a vibration mechanism for driving the puncturing rod piece to generate high-frequency micro vibration, a rotating mechanism for driving the puncturing rod piece to rotate and a puncturing movement mechanism for driving the whole puncturing rod piece to do linear reciprocating motion. The stirring part is configured to be radially expanded into an expanded structure from a folded state under the action of centrifugal force; and a cutting unit disposed downstream. The system is mainly used for realizing efficient and automatic separation of passion fruit pulp, remarkably improves the pulp yield and the seed integrity rate, and is suitable for deep processing processes such as subsequent pulp freeze-drying.

The invention provides a preparation method of lignin sulfonate and application of the lignin sulfonate in water retention and flocculation, and relates to the technical field of utilization of camellia oleifera shells, the lignin sulfonate prepared through the method can be used for preparing a water-retaining agent and a flocculating agent, the obtained water-retaining agent has high water absorption, the obtained flocculating agent has the ethyl violet removal capacity, and in addition, the lignin sulfonate can be used for water retention and flocculation. When the sulfonated lignin is used for preparing the water-retaining agent and the flocculating agent, the production cost of the water-retaining agent and the flocculating agent can be reduced, the environmental pollution is reduced, and efficient recovery and cyclic utilization of resources are realized.

The invention discloses a preparation process of a pure plant essential oil disinfectant, and relates to the technical field of disinfectants. The problems that plant essential oil is poor in solubility in a water phase, low in stability and the like are solved. The method specifically comprises the following steps: preparing raw materials; preparing a nano emulsion; preparing a solvent and mixing; constructing a natural stable system to obtain a primary product; filtering and sterilizing; and carrying out sterile filling on the disinfectant finished product. The invention provides a pure plant essential oil disinfectant prepared by dissolving type 1 and 8 melaleuca alternifolia essential oil in water, efficient dispersion is realized through a nano-emulsification and natural stabilization technology so as to form a stable aqueous solution, an amphiphilic structure of soapbark saponin is utilized, aglycone and essential oil terpene form a supramolecular compound, and the stable aqueous solution can be used for sterilizing the melaleuca alternifolia essential oil and the melaleuca alternifolia essential oil and the melaleuca alternifolia essential oil. The technical problems of poor dissolvability and low stability of plant essential oil in a water phase are solved, and the plant essential oil has broad-spectrum antibacterial and antiviral characteristics and can meet the disinfection requirements in multiple fields such as medical treatment, object surface treatment, home furnishing and personal care.

The invention relates to a method for converting lignocellulosic biomass by contacting pretreated lignocellulosic biomass with at least one biocatalyst (3) in an aqueous phase in a first reactor (1) containing a reaction medium, the reaction medium comprises the pretreated lignocellulosic biomass (2) and the biocatalyst in an aqueous phase, the process comprises: (a) a first liquefaction step without removing all or part of the reaction medium from the reactor by adding the pretreated lignocellulosic biomass and at least one biocatalyst to the reactor, followed by (b) a second continuous liquefaction step, wherein a portion of the reaction medium is continuously withdrawn from the first reactor, at least one biocatalyst is added, and pretreated lignocellulosic biomass is continuously added.

The invention belongs to the technical field of tea dye extraction, and particularly relates to a tea dye extraction process which comprises the steps of cleaning, drying and crushing tea leaves or tea leaf stalks, extracting pigment, dyeing cloth and fixing color. The tea dye extraction device specifically comprises a first cleaning device, a drying device, a crushing device, an extraction device, a dyeing device and a second cleaning device which are matched with one another to realize an extraction process of tea dye, and the extraction device is cleaned after tea or tea stalks are extracted; according to the tea leaf extraction device, tea leaves or tea leaf stems are smashed and then extracted, extraction is more sufficient, and due to the fact that the extraction device can be cleaned after being used, extracted pigment is purer, and the follow-up dyeing effect is better.

The invention discloses a high-efficiency aerobic fermentation corncob-based biological conditioner and application thereof. Aiming at the common problems of unstable carrier effect, poor environmental adaptability, easiness in inactivation of the microbial inoculum, difficulty in continuously exerting efficacy and the like existing in the existing composting microbial inoculum, the agricultural waste corncob with a porous structure and excellent water-retaining and fertilizer-retaining natural characteristics is pretreated and modified; and the immobilized carrier of the aerobic fermentation inoculant with high activity and high stability is constructed. The carrier matrix can be used for efficiently loading and remarkably improving the expanding culture core aerobic fermentation functional flora to prepare a solid biological conditioner. The corncob-based biological conditioner is applied to the composting process of organic solid wastes, promotes the humification process of organic materials, shortens the composting period, improves the fermentation efficiency of the materials, and effectively improves the resource utilization level of the organic solid wastes.

The invention discloses a process for manufacturing bamboo charcoal fibers from a biomass material, and belongs to the technical field of biomass material processing, the process for manufacturing the bamboo charcoal fibers from the biomass material comprises the following steps: S1, pretreatment of bamboo wood: cutting the bamboo wood, soaking the cut bamboo wood in an alkaline solution with the mass fraction of 3-8%, and cooking to remove lignin; s2, pre-carbonization treatment is conducted, specifically, the bamboo wood is subjected to primary carbonization in an inert gas environment; s3, carrying out segmented carbonization-activation, and carrying out gradient heating in two stages under the nitrogen pressure of 0.2-1.2 MPa; and S4, fiber forming: carrying out melt spinning on the activated bamboo charcoal and the bio-based polymer to obtain the fiber. Through segmented gradient carbonization and activation, bio-based polymer blending and environment-friendly process integration, efficient and green preparation of the bamboo charcoal fibers is achieved, the adsorption performance, the mechanical strength and the degradability are remarkably improved, and meanwhile energy consumption and pollution are reduced.

The invention discloses a production process for preparing tofu cat litter from wet bean dregs by a one-step method, and belongs to the technical field of tofu cat litter production, resource recycling and environmental protection, and the production process comprises the following steps: treating the wet bean dregs through multistage filter pressing equipment with a continuous vacuum auxiliary function; homogenizing and mixing the filter-pressed wet bean dregs with a reinforcing agent, a binder and a modifier in an ultrasonic dynamic mixing device; performing low-temperature puffing on the mixed material; the production efficiency of the tofu cat litter is remarkably improved, energy consumption is reduced, low carbon and environmental protection are achieved, the processes of repeated drying and water adding are avoided, a reasonable formula and novel equipment are combined, the water absorption, deodorization and antibacterial property of the cat litter are improved, the long-term problem of the bean product industry can be solved, and the production cost is reduced. The defect of poor performance of the environment-friendly cat litter in the market can be overcome, and an innovative resource recycling technical scheme is provided.

The invention discloses an efficient treatment process for salt-containing industrial wastewater, and relates to the technical field of wastewater treatment. Salt-containing industrial wastewater sequentially passes through an adjusting tank, a silicon and hardness removal unit, a biochemical unit, a secondary sedimentation tank, a fluorine removal unit, a filter unit, a catalytic ozonation unit, a moving bed bio-membrane reactor treatment unit, a powder carbon sedimentation unit and an ultrafiltration-reverse osmosis double-membrane unit to be treated, produced water is recycled, and concentrated water enters an evaporation and concentration unit; the silicon removal and hardness removal unit is used for treating the wastewater by adding a flocculating agent and a composite coagulant aid; the flocculating agent is a chitosan-based flocculating agent, and the addition amount of the flocculating agent is 10 to 20 mg / L; the composite coagulant aid is composed of a magnesium-aluminum hydrotalcite coagulant aid and alginic acid-silicate hybrid microgel according to the mass ratio of 2: (1-4), and the addition amount of the composite coagulant aid is 5-15 mg / L. The treatment effect of the salt-containing industrial wastewater is remarkably improved.

The invention relates to the technical field of wood-plastic floors, in particular to an anti-corrosion and anti-insect straw wood-plastic floor and a preparation process thereof.The anti-corrosion and anti-insect straw wood-plastic floor comprises a floor body, and the floor body further comprises an upper-layer plate, a middle-layer plate and a lower-layer plate which are sequentially and fixedly connected from top to bottom; the medicine box is mounted at the end part of the connected floor main body; the medicine loading assembly is mounted in the medicine box; the water flow channel is formed between the middle-layer plate and the lower-layer plate, and the end of the water flow channel communicates with a water inlet pipe penetrating through the upper-layer plate to form a water inlet; the medicine flow path is arranged between the upper-layer plate and the middle-layer plate; the water flow driving assembly is mounted in the pesticide box and used for driving water flow to pass through the pesticide loading assembly; according to the device, through the arrangement of the water flow driving assembly and the pesticide flow path, insect prevention protection on the floor is achieved, pesticide can remain in the pesticide flow path, the onset time of the pesticide can be prolonged, and therefore the insect prevention time efficiency of the floor is enhanced.

The invention discloses a method and a system for efficiently producing short-chain fatty acid by utilizing waste molasses in the sugar industry and municipal sludge through synergistic anaerobic fermentation, and belongs to the technical field of organic solid waste recycling. Waste molasses and municipal sludge are mixed according to a specific ratio, the carbon-nitrogen ratio is optimized to 20-30: 1, trace metal catalysts (Fe < 2 + >, Co < 2 + > and Ni < 2 + >) are added, and two-stage pH regulation (the initial pH is 6.0-7.0, and the later pH is 5.5-6.0) and a medium-temperature (35-37 DEG C) anaerobic fermentation process are combined, so that the yield of short-chain fatty acid is remarkably increased to 5.2-6.8 g COD / L and is increased by 200-300% compared with that of traditional sludge single-substrate fermentation. The method realizes recycling and high-value conversion of the organic solid waste, and has the characteristics of low cost, high acid production efficiency and environmental friendliness.

The invention provides a coconut coir processing technology. The coconut coir processing technology comprises the following steps: S1, crushing coconut shells; s2, coconut shell fiber shredding; s3, mixing and water treatment; s4, draining and desalting; and S5, compacting and forming. According to the method disclosed by the invention, mechanical cold pressing is integrated with desalting, dehydrating and compressing steps, so that the desalting and dehydrating efficiency can be remarkably improved, thermal damage and oxidative deterioration of a traditional process are avoided, and the fiber performance is reserved, thereby better maintaining the water absorption and elasticity of a coconut coir product, reducing the volume loss rate during transportation and improving the quality of the coconut coir product. And the low salinity, low EC value, high water absorption and high elasticity are all beneficial to the development of the root system of the plant.

The current invention concerns a fire retardant composition for use in wood composite panels, either comprising a fire retardant agent or an intumescent formulation, whereby the pH of a 10% aqueous solution of said composition lies between 3.5 and 8.5. The present invention also provides for a specific use of the composition in fire retardant wood composite panels, the respective method for producing those panels, as well as the resulting wood composite panels themselves.

The invention relates to the field of demulsifiers, in particular to an oil sludge demulsifier as well as a preparation method and application thereof. The oil sludge demulsifier comprises the following components in parts by mass: 20-35 parts of a surface active compound, 7-12 parts of a sodium alkyl sulfate cosolvent, 0.6-1.8 parts of a stabilizer and 48-55 parts of water, wherein the surface active compound comprises hyperbranched polyamidoamine and polyether amine modified magnetic nanoparticles. According to the oil sludge demulsifier, the problems that most of existing demulsifiers are small in dehydration amount, low in dehydration speed, poor in demulsification effect and low in treated oil content are solved, the demulsification performance of the oil sludge demulsifier is improved, the demulsification and dehydration efficiency is improved, and effective separation of oil sludge is achieved.

The invention discloses a method for producing a green packaging material by using field planting tobacco waste, which comprises the following steps: by taking tobacco stems as raw materials, extracting to obtain high-purity nicotine, extracting active chemical components to obtain tobacco stem residues, primarily treating the residual tobacco stems by an extruding and tearing machine to cut off and separate the tobacco stems into shreds, and drying the shreds to obtain the green packaging material. The cut tobacco stems enter a closed reaction bin, steam heating is adopted, ammonium sulfite or sodium sulfite and sodium hydroxide are added, EDTA and the ammonium sulfite or sodium sulfite and sodium hydroxide solution can dissolve fibrous adhesive lignin in the tobacco stems, and the tobacco stems can be used for producing green packaging materials after further mechanical treatment. Tobacco stem waste residues obtained after nicotine and pectic substance extraction are used as plant fiber paper pulp for producing the green packaging material, holocellulose in the tobacco stem residues is fully recycled and subjected to high-value resource utilization, the waste recycling value is increased, and the problem of waste environmental pollution is solved.

The invention discloses a method for detecting the content of chlorophenol substances in a bamboo material and a product for food contact, and belongs to the technical field of detection. The method specifically comprises the steps of standard liquid preparation, sample treatment and sample testing. According to the method, a content and migration quantity pretreatment mode without derivatization treatment is adopted, and an ultra-high performance liquid chromatography-tandem mass spectrometry detection technology is matched, so that the method for testing the content of the chlorophenol substances in the bamboo and wood materials and products for food contact, which is simple in pretreatment process, accurate in test, efficient, rapid, high in sensitivity and high in practicability, is realized.

The invention relates to the technical field of water pollution treatment, in particular to a poplar chemi-mechanical pulp wastewater treatment device with a fiber collection function. Comprising a cover body rotationally connected to a tank body, the tank body is provided with a liquid injection pipe communicated with the interior of the tank body, an inner cylinder is fixedly connected in the tank body, the inner cylinder is fixedly connected with a motor, an output shaft of the motor is fixedly connected with a threaded rod, the threaded rod is in threaded connection with a filter plate, and a plurality of through holes are formed in the filter plate. The filter plate is slidably connected with a dredging plate, and the dredging plate is provided with dredging parts with the same number as the through holes. According to the device, fibers are blocked on the upper side of the filter plate through the filter plate, and a flocculant is injected into the lower side of the filter plate, so that the probability that the flocculant is blocked by the fibers in the process of injecting the flocculant into wastewater and reacting with the wastewater is reduced, the influence of the fibers on the flocculant is reduced while the fibers are collected, and the flocculation reaction efficiency of the wastewater is further improved.