138 results about "White water" patented technology

The invention relates to a preparation method of high-substitution-degree cationic micro-nano cellulose and application of the high-substitution-degree cationic micro-nano cellulose to improvement of water filtering performance of paper. In the enzymolysis pretreatment process, beta-1, 4 glucosidic bonds among glucose molecules are cut off, and more reaction binding sites are created for cationization after cellulose in an amorphous region and a part of crystalline region is hydrolyzed, so that the use amount of chemical reagents can be effectively reduced, and the environmental pollution is reduced. The prepared high-substitution-degree cationic micro-nano cellulose (CMFC) has abundant positive charges, weakens the hydrogen-bond interaction of cellulose molecules, improves the content of nano-fibrillation, and effectively reduces the mechanical preparation energy consumption of the CMFC. CMFC pulp is added into paper pulp fibers, so that pores of the paper fibers are blocked, more filler is intercepted, and the filler is difficult to be completely brought into white water by water flow in the water filtering process, so that the retention rate is increased, and the water filtering performance is effectively improved.

According to the liquid defoaming agent for papermaking white water and the preparation method of the liquid defoaming agent, through combined use of the high-carbon alcohol emulsion and the polyether emulsion, the problem that the foam inhibition capacity of the high-carbon alcohol emulsion is insufficient can be solved, meanwhile, the alcohol ether solution is adopted as a solubilizer to be used for improving the cloud point of polyether in a system, the system is prevented from being changed due to the temperature, and the foam inhibition capacity of the high-carbon alcohol emulsion is improved. The precipitation of polyether leads to system imbalance; the defoaming agent obtained by compounding the high-carbon alcohol emulsion and the polyether solution in proportion can realize more excellent defoaming and foam inhibition performance in papermaking white water, and the storage stability is effectively enhanced.

The embodiment of the utility model provides a bamboo pulp grading screening system which comprises at least two screening units connected in parallel, each screening unit comprises at least two pressure screens connected in series, each pressure screen comprises a screen plate used for separating pulp into long fiber pulp and white water, each screen plate comprises screen holes, the diameter of each screen hole is 0.6-1.1 mm, and the diameter of each screen hole is 0.6-1.1 mm. In the same screening unit, the ratio of the area of the screen plate of the pressurized screen located on the upstream to the area of the screen plate of the pressurized screen located on the downstream is 1: (0.55-0.8), the average length of obtained long fiber pulp is better than that in the prior art through the bamboo pulp grading screening system formed through the arrangement, meanwhile, the screening rate of medium and short fibers is greatly increased, and the system runs stably.

The invention discloses a fiber synergistic copolymer as well as a preparation method and application thereof, and belongs to the technical field of papermaking chemicals and high polymer materials. Aiming at anion garbage interference caused by deepening of closed circulation of white water in the papermaking industry and green compliance challenges caused by replacing plastic with paper, the copolymer adopts a specific polycarboxylic acid and trace cationic monomer structure-effect design, and has excellent anti-interference capability and permeability. In the wet-end in-pulp enhancement, the enhancement effect of the additive can be superior to that of a traditional high-molecular-weight additive only by a relatively low addition amount, and water filtration and retention are remarkably improved; in a surface sizing and pulp molding hot pressing process, the rigidity and the water-resistant size stability of a product can be greatly improved through a unique cross-linking mechanism. According to the scheme, the industrial pain point of low enhancement efficiency in a complex environment is effectively solved, and the product does not contain organic fluorine and completely meets the requirements of environmental protection and sustainable development of a high-performance fiber-based material.

The utility model discloses a paper pulp preparation device which comprises a dissolving tank, a constant volume tank, a white water tank and a mixing and dissolving tank, the dissolving tank, the constant volume tank and the mixing and dissolving tank are respectively provided with a liquid outlet, the liquid outlet of the dissolving tank is communicated with the interior of the constant volume tank, a first valve is arranged at the communication position, the liquid outlet of the constant volume tank is communicated with the interior of the mixing and dissolving tank, and a second valve is arranged at the communication position. The white water tank is provided with a water outlet, the water outlet of the white water tank is communicated with the dissolving tank and the constant volume tank, a third valve is arranged at the communication position, a liquid outlet of the mixing and dissolving tank is communicated with the paper machine, a fourth valve is arranged at the communication position, and the dissolving tank is used for adding papermaking filler and white water for pre-dissolving to prepare a filler solution; the constant volume tank is used for adding a filler solution and white water to make the volume of the filler solution constant to a preset concentration, and the mixing and dissolving tank is used for adding papermaking fibers and the constant-volume filler solution and uniformly mixing to prepare paper pulp, so that the papermaking filler, the papermaking fibers and the white water can be conveniently and continuously uniformly mixed to obtain the paper pulp.

The application discloses a multi-carboxyl copolymer aqueous composition for pulp adding in packaging paperboard, synergism in short-stay pulp of packaging paper and fiber synergism in wet end of bamboo pulp paper, and a preparation and application method thereof, and belongs to the technical field of pulp and paper chemicals and wet end chemical control. The composition contains carboxyl-rich copolymer, and can be selected as high filtration rate homogeneous aqueous solution type, flexible type acid or bamboo pulp low cation density copolymer according to paper types, and is prepared through water phase free radical polymerization. In application, the composition is diluted and then added in a divided mode after a fan pump outlet to a pressure screen inlet or after a cationic polyacrylamide retention agent or in a bamboo pulp system. The method is beneficial to improving fiber combination, drainage stability, first-pass retention rate, white water stability and paper strength, and improving the adaptability of wet end dosing windows of different paper types.

The invention relates to the technical field of titanium dioxide production, in particular to high-retention and high-weather-resistance titanium dioxide as well as a preparation method and application thereof. Comprising a titanium dioxide base material and a coating layer located on the surface of the titanium dioxide base material, and the coating layer sequentially comprises an aluminum oxide film layer, a tin oxide film layer and an ascorbyl palmitate film layer from inside to outside. The preparation method comprises the following steps: preparing titanium dioxide-based material slurry, sequentially carrying out aluminum oxide coating and tin oxide coating, then carrying out water washing, flash evaporation and steam powdering, and adding ascorbyl palmitate in the steam powdering process to obtain the high-retention and high-weather-resistance titanium dioxide. The tin coating layer and the ascorbyl palmitate coating layer are introduced to the outer side of the aluminum oxide coating layer, so that the retention rate and weather resistance of titanium dioxide in paper are remarkably improved, and the use requirements of high-end paper are met; the white water treatment pressure can be reduced, and the economic benefit is improved.

A high-gram-weight raw paper white water advanced treatment system relates to the technical field of white water treatment and comprises a disc filter, and the outlet end of the disc filter is respectively connected with an ultra-clear filtrate tank and a clear filtrate tank; the outlet end of the ultra-clear filtrate tank is connected with a tubular filter, and the outlet end of the tubular filter is connected with a net pressure part high-pressure sprayer; and the outlet end of the clear filtrate tank is connected with the ultra-clear filtrate tank through a circulating fine filtration structure. The utility model solves the problem that in the prior art, the treatment depth of clear filtrate and ultra-clear filtrate after white water is treated by a physicochemical treatment method or a biological treatment method does not reach the degree that the clear filtrate and the ultra-clear filtrate can be used for high-pressure spray water of a net part.

The invention discloses a system for purifying and separating papermaking white water fine stickies, and belongs to the technical field of pulping and papermaking wastewater treatment. Comprising a physical grading deslagging unit, a chemical modification treatment unit, a biological enzymolysis reaction unit and a slurry forming unit which are sequentially communicated through a conveying pipeline I, wherein a conveying pipeline II is arranged between a feeding hole of the physical grading deslagging unit and a waste slurry discharging hole of the slurry forming unit, and a white water deep filtering unit is arranged on the conveying pipeline II; the physical grading deslagging unit, the chemical modification treatment unit, the biological enzymolysis reaction unit and the white water deep filtering unit can form a white water backflow circulation path through a conveying pipeline I and a conveying pipeline II. The system for purifying and separating the fine stickies in the papermaking white water, disclosed by the invention, can realize graded and accurate removal of the stickies with large, medium and small particle sizes in the papermaking white water, and effectively solves the problems of deposition and scaling of the stickies in equipment.

The utility model discloses a tailing fiber recycling device for a deslagging section. The tailing fiber recycling device comprises a feeding tank, a first multi-section deslagging device, a transverse deslagging device, a second multi-section deslagging device, a white water tank, a slag tank and an accepted pulp tank, a feeding hole of the first multi-section slag separator is communicated with the discharging end of the feeding tank, and a slag outlet in the bottom of the first multi-section slag separator is communicated with a feeding hole of the transverse slag separator; preliminary deslagging and filtering are carried out through the first multi-section deslagging device, filtered slag slurry enters the transverse deslagging device, and white water is pumped into the transverse deslagging device through the white water tank, so that the slag slurry is rotationally separated in the transverse deslagging device; and the formed accepted pulp is automatically returned to the first multi-section slag separator, is discharged from the accepted pulp opening after being subjected to slag discharge, and further fiber recovery is realized through mutual cooperation of the transverse slag separator, the first multi-section slag separator and the second multi-section slag separator, so that the fiber content in the slag pulp is lower, and the utilization rate of the fiber is improved.

The water treatment equipment comprises an outer cylinder, an inner cylinder and a raw water inlet, the inner cylinder is fixedly connected to the interior of the outer cylinder, the upper end of the outer cylinder is fixedly connected with a sedimentation channel, the center of the top of the outer cylinder is rotatably connected with a slag scraping plate, and the slag scraping plate is fixedly connected with the sedimentation channel. A space is formed from the middle parts to the upper ends of the outer cylinder and the inner cylinder to form a second-stage reaction area, the upper end of the second-stage reaction area is connected with a second-stage gas-dissolved water inlet extending out of the outer cylinder, the inner cylinder is internally provided with a first-stage gas-dissolved water inlet extending out of the outer cylinder, and the first-stage gas-dissolved water inlet is located in the inner cylinder and is connected with a first-stage release device; the lower end of the secondary reaction zone is connected with an air flotation water outlet and an air flotation water intake which extend out of the outer cylinder, the lower end of the inner cylinder is provided with a conical sedimentation zone, the sedimentation zone is connected with a sewage draining exit which extends out of the outer cylinder, a sedimentation channel is connected with one end of a raw water inlet, and the other end of the raw water inlet extends out of the outer cylinder; the lower end of the slag scraper is positioned at the upper end of the inner cylinder.

The utility model relates to a paper pulp production system capable of recycling white water, which comprises a white water tank, an air floatation device, a short fiber defibering pipeline, a long fiber grinding pipeline and a sizing pipeline, and the tail ends of the short fiber defibering pipeline and the long fiber grinding pipeline are respectively converged to the sizing pipeline; an outlet of the white water tank is respectively connected with the first centrifugal pump and the second centrifugal pump; the first centrifugal pump is respectively connected with the short fiber defibering pipeline and the long fiber grinding pipeline and is used for respectively conveying white water in the white water tank into the short fiber defibering pipeline and the long fiber grinding pipeline; an outlet of the second centrifugal pump is respectively connected with the air floatation device and the sizing pipeline and is used for respectively conveying the white water in the white water tank into the air floatation device and the sizing pipeline. Compared with the prior art, the white water in the white water tank can be conveyed into the short fiber defibering pipeline, the long fiber pulping pipeline and the sizing pipeline, so that the white water can be recycled in the whole paper production system.

The invention discloses a production method for reducing the proportion of long fibers of cream base paper, and belongs to the field of papermaking. The main technical scheme is as follows: raw materials comprise long fibers (one or more of cotton pulp, softwood pulp and bamboo pulp which are subjected to repulping and are ground by two serially connected disc mills until the beating degree is 25-35 degrees SR and the wet weight is 8.0-13.0 g), short fibers (hardwood pulp which is subjected to repulping and defibering and the beating degree is 15-20 degrees SR) and broken paper (subjected to repulping and defibering); adjusting the flow, mixing the three components according to the mass ratio of (8-20): (85-70): (15-0) in a pulp preparation pool, and uniformly grinding until the beating degree is 25-45 degrees SR; the white water reflux quantity is regulated and controlled in the process. And after the slurry is formed by a high-speed paper machine, wrinkling by using a ceramic or carbon steel scraper under the dryness of 55-85% at the wrinkling rate of 18-25%, and coiling and slitting to obtain the cream base paper. The quantification of the raw paper is 10-20g / m < 2 >, and the transverse dry tensile index is gt; 3.0 N.m / g, and the longitudinal wet tensile index gt; 3.0 N.m / g, and the softness lt; the bulk is gt; 6.60 m < 3 > / g, and the transverse liquid absorption height gt; and 75 mm / (100s). The process is optimized, the use amount of long fibers is remarkably reduced, meanwhile, it is ensured that the cream base paper has excellent strength and bearing performance, and the cost is remarkably reduced.

The invention discloses paper processing equipment, a paper preparation method and paper, relates to the technical field of papermaking, and aims at solving the problems that waste is large during paper changing, and white water treatment burden is large. The paper processing equipment comprises a pulp processing part, a paper forming part, a dyeing part and a drying part which are connected in sequence; the dyeing part comprises two dyeing rollers which are oppositely arranged and is used for dyeing the two surfaces of the base paper dried by the paper forming part; the drying part comprises a first drying device and a second drying device, and a water outlet of the first drying device is connected with a water inlet of the second drying device.

The invention belongs to the technical field of fiber recovery, and provides a fiber recovery system in a household paper white water system, which comprises a support table, and the support table is fixedly connected with a recovery tank; the monitoring module comprises a turbidity detector arranged on the inner wall of the recovery tank, a separation mechanism is arranged at the position, close to the top, in the recovery tank, the separation mechanism can separate the fiber layer from the bubbles, and the separation mechanism can also detect the density of the fiber layer. According to the device, when a turbidity detector monitors that the turbidity in the recovery tank is large, the backflow speed of backflow water in the dissolved air tank is increased through a second water pump, so that the backflow ratio is increased, and meanwhile, a second motor is started to drive all rotating pore plates to rotate; bubbles in the backflow water can be broken through cooperation of the guide holes in the fixed pore plate and the rotary pore plate, and therefore the diameter of the bubbles in the backflow water is controlled.

The present invention provides a system for continuously monitoring and extracting stickies from papermaking white water, and an application for extracting stickies. The system includes a mounting frame, a white water sampling system, a sample pretreatment system, a hot air separation system, a negative pressure extraction system, and an integrated isolation structure. The system uses a sampling port provided on the white water delivery pipeline and a cyclic rotation mechanism of a sampling pulp plate to continuously collect, separate, and extract stickies from the white water. Based on the differences in the physical properties of dissolved wood fiber and stickies, the two are separated using hot air drying and differential adsorption technology. The system is equipped with an intelligent control unit that can monitor changes in stickies content 24 hours a day. The application method includes four steps: continuous extraction, real-time analysis, dynamic feedback control, and adaptive production optimization. The monitoring data is converted into production control instructions to form a closed-loop control system. This effectively reduces the adverse effects of stickies on the papermaking system, and reduces equipment blockages and paper defects.

The utility model discloses a kind of papermaking white water fiber air floatation device, it is related to papermaking white water recovery technical field, including dross pond, the inside of the dross pond is provided with multiple filter screens, vibration mechanism is provided on the dross pond, the vibration mechanism is used to drive filter screen to vibrate, and press mechanism is connected on the vibration mechanism;The vibration mechanism includes first motor, the first motor is installed above the dross pond, the output end of the first motor is connected with shaft, and the press mechanism includes fixed frame, the fixed frame is connected on the shaft, the press mechanism further includes pressing plate, second fixed ring is connected on the pressing plate, one end of the fixed frame close to second fixed ring is rotatably connected with runner, the runner and second fixed ring contact, and the pressing plate is elastically connected above one of filter screen, the present scheme can further process by-product dross in air floatation device, to improve the recovery value of dross.

The application relates to the corrugated paper production field, in particular to low-energy-consumption high-quality corrugated paper production equipment and a process thereof. Technical problem: In the process of corrugated paper production, the thick white water needs to be recycled for multiple times to realize thickening or dilution of the white water due to the physical performance characteristics of internal materials, thereby causing the working cost of the whole corrugated paper production equipment to increase. Technical scheme: The low-energy-consumption high-quality corrugated paper production equipment comprises a pulping assembly and a headbox assembly. The application adds guanidine hydrochloride and a fat enzyme or a gum control agent to pulp before thick white water is formed, so that the internal gum of the pulp is controlled, the thick white water can be quickly diluted or thickened, and the problem that the thick white water needs to be recycled for multiple times to realize thickening or dilution of the white water due to the physical performance characteristics of internal materials in the process of corrugated paper production is solved.

The utility model relates to the technical field of papermaking white water treatment, and discloses a detection interlocking system for a white water system under a papermaking mesh, which comprises a DCS (Distributed Control System) papermaking system, a papermaking module and a filtering module for filtering white water generated by the papermaking module, and is characterized in that the white water filtered by the filtering module enters a white water tank; the interior of the white water pool is communicated with a retention aid tank through a pipeline, a flow valve is arranged on the pipeline between the retention aid tank and the white water pool, and a stirring assembly is arranged in the middle of the white water pool; a concentration monitoring assembly is arranged in the white water tank, and the white water tank is communicated with a white water purification tank through a drainage pump. According to the utility model, the concentration of white water under a papermaking mesh can be detected and is synchronously fed back to a papermaking DCS (Distributed Control System), so that the addition amount of a retention aid is controlled to ensure that the concentration of the white water and the addition amount of the retention aid are in an optimal state.

1. Name of the designed product: packing box (white water intestine). 2. Use of the designed product: for packing sausage. 3. Design points of the designed product: combination of shape and pattern. 4. Picture or photo best indicating the design points: perspective view.

The utility model discloses a kind of pulping white water multi-disc conveying spiral shaft head, it is related to papermaking pulping technical field, including main shaft body and conveying spiral connecting end, the conveying spiral connecting end is fixedly connected in main shaft body end part;The connecting place of main shaft body and conveying spiral connecting end is equipped with flange, the flange is welded with stainless steel flange, main shaft body and stainless steel flange form integral structure, welding seam is formed between the flange and stainless steel flange inner side, four shaft head disassembly jackscrew thread holes that are circumferentially evenly distributed are equipped in the inside of stainless steel flange.The pulping white water multi-disc conveying spiral shaft head, the flange of the shaft head and the conveying spiral connection is changed into stainless steel flange and carbon steel shaft head firm welding into an integral whole, both reduce cost, and also guarantee the durability of easy rusting corrosion site, after amplification of disassembly jackscrew thread hole, the probability of screw rod breakage reduces, and disassembly shaft head is more relaxed.

The present application belongs to the field of papermaking industry water treatment and clean production, especially to a white water treatment system suitable for the spraying water of the wire section and press section of a paper machine, which comprises: a clean water pretreatment unit for high-precision filtration of clean water to remove suspended solids and particulate impurities in the water and ensure the cleanliness of the spraying water; a high-pressure liquid supply unit connected with the clean water pretreatment unit for pressurizing the pretreated clean water to ultrahigh pressure and secondary precision filtration to provide a stable high-pressure cleaning water source; a water quality stabilization unit connected with the high-pressure liquid supply unit for adding a compounded agent to the high-pressure spraying water and real-time regulation and control of the water quality to inhibit bacterial growth and scaling corrosion; and a partition spraying unit connected with the high-pressure liquid supply unit for ultrahigh-pressure precision cleaning of the forming wire and press felt of the wire section and press section of the paper machine. The present application provides a high-integration, recyclable, energy-saving and consumption-reducing spraying water white water treatment system.

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 invention provides a papermaking machine white water recycling treatment device, and relates to the technical field of wastewater treatment.The papermaking machine white water recycling treatment device comprises a treatment pond, a pushing mechanism, an oxygen injection assembly and a butt joint mechanism, a bottom plate is arranged at the bottom of the treatment pond and used for dividing the interior of the treatment pond into two spaces, and the pushing mechanism is installed at the bottom of the bottom plate and used for pushing the oxygen injection assembly into the two spaces; a motor is mounted at one end of the pushing mechanism, the motor is in threaded connection with the bottom of the side edge of the treatment pond, an oxygen injection assembly is inserted into the surface of the bottom plate, and a plurality of partition plates are arranged on the inner side of the treatment pond. The device can ensure that the injected wastewater can slowly and continuously flow in the same treatment tank, and the purposes of oxygen injection and microbial decomposition and purification are achieved in the flowing process, so that the wastewater can be continuously injected in the recovery treatment process of the papermaking machine white water, and continuous discharge is achieved; injection and discharge in batches are not needed, and the purification process is more efficient and convenient.

The invention discloses a polyether type defoaming agent as well as a preparation method and application thereof, and the polyether type defoaming agent is obtained by carrying out second polymerization on 35%-65% of allyl polyoxyethylene ether, 20%-65% of allyl polyoxypropylene ether and 0%-15% of allyl polyoxybutylene ether; the allyl polyoxyethylene ether is formed by first polymerization of allyl alcohol and ethylene oxide, the allyl polyoxypropylene ether is formed by first polymerization of allyl alcohol and epoxypropane, and the allyl polyoxybutylene ether is formed by first polymerization of allyl alcohol and epoxybutane. When the polyether type defoaming agent is used in papermaking white water, the foam inhibition and defoaming properties are obviously improved, and the quality of paper products is not influenced.

The application discloses a fiber synergistic copolymer and a preparation method and application thereof, and belongs to the technical field of papermaking chemicals and high polymer materials. In view of the anion garbage interference caused by the deepening of white water closed circulation in the papermaking industry and the green compliance challenge brought by 'paper instead of plastic', the copolymer is designed in structure and function by using specific polycarboxylic acid and trace cationic monomer, and has excellent anti-interference ability and permeability. In the wet end pulp strengthening, the copolymer can surpass the strengthening effect of traditional high molecular weight additives by only needing a low amount of addition, and significantly improves the drainage and retention; in the surface sizing and paper pulp molding hot pressing process, the copolymer can greatly improve the rigidity and water resistance dimensional stability of products through a unique crosslinking mechanism. The scheme effectively solves the industry pain point of low strengthening efficiency in a complex environment, and the product does not contain organic fluorine, and completely meets the environmental protection and sustainable development needs of high-performance fiber-based materials.

The utility model belongs to the technical field of papermaking, and particularly relates to a papermaking white water filtering device which comprises a tank body, a cover plate is assembled on the top of the tank body, a water inlet pipe is fixedly connected to the top end of the cover plate, a filter screen is assembled on the inner wall of the tank body, a support is fixedly connected to the bottom of the tank body, and a drainage pipe is fixedly connected to the position, close to the bottom end, of the side wall of the tank body. A rotating shaft is rotationally connected to the bottom surface of an inner cavity of the tank body, the top end of the rotating shaft penetrates through the filter screen and is rotationally connected with the filter screen, a motor is fixedly connected to the bottom end of the tank body, the output end of the motor is fixedly connected with the rotating shaft, a sleeve is assembled at the top end of the rotating shaft, a scraper is fixedly connected to the side wall of the sleeve, and a cleaning assembly is arranged on the side wall of the scraper. According to the device, the white water can be continuously filtered, and the filtered paper pulp fiber does not need to be manually cleaned, so that the purpose of continuously and efficiently filtering is achieved.

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 invention belongs to the field of fiber recovery technology and provides a fiber recovery system for a household paper white water system, comprising a support platform fixedly connected to a recovery tank; a monitoring module comprising a turbidity detector disposed on the inner wall of the recovery tank, a separation mechanism disposed near the top of the recovery tank, the separation mechanism capable of separating a fiber layer from bubbles, and the separation mechanism capable of also detecting the density of the fiber layer. In the present invention, when the turbidity detector detects high turbidity in the recovery tank, the No. 2 water pump is first used to increase the return flow rate of the return water in the air dissolving tank, thereby improving the return flow ratio. Simultaneously, the No. 2 motor is activated to drive all rotating orifice plates to rotate. The fixed orifice plate cooperates with the guide holes on the rotating orifice plate to break up the bubbles in the return water, thereby controlling the bubble diameter in the return water.

The invention relates to an efficient toning method in paper product production, which comprises two stages of preparation before startup and sizing and real-time toning, and specifically comprises the following steps: the preparation stage before startup comprises the following steps: S11, collecting related data required for producing cardboard paper, the data at least comprise target paper quantification, slurry flow, white water circulation system parameters and cardboard paper target color parameters, the white water circulation system parameters comprise white water flow and residual dye components and content in white water, and the cardboard paper target color parameters comprise RGB values or Lab values; the technical problems that according to an existing paper product color matching method, the color matching process time is long, the production efficiency is greatly affected, the invalid operation time of equipment is prolonged, the yield in unit time is reduced, meanwhile, due to the fact that dye needs to be continuously added and adjusted in the color matching process, a large amount of dye is wasted, and the production cost is increased are solved.