780 results about "Green production" patented technology

The invention relates to an industrial process soft measurement method, in particular to an industrial process soft measurement method of a multi-module self-attention gating network, which is familiar with an actual industrial process and determines a process variable and a quality variable; industrial data are collected and divided; performing data preprocessing; the processed data are transmitted to an input and output isomorphic auto-encoder network (IOSIAE) to learn effective information, and deep quality related features are extracted; and taking the depth features extracted by the IOSIAE as the input of a self-attention mechanism, taking the features after the self-attention extraction as the input of a gating mechanism, carrying out dynamic weighting on the gating mechanism, constructing a hybrid model to realize quality variable prediction, and verifying the model prediction performance according to an evaluation index. On-line prediction is carried out through a soft measurement model, an industrial product quality variable prediction value is obtained, a production operation process is monitored and controlled in real time, and a production strategy is adjusted to ensure production efficiency, improve product quality and realize green production.

The invention relates to a preparation method of a universal super-hydrophobic fluoride-free waterproof agent with strong washability. According to the method, a polymeric monomer and a polymerizable silane coupling agent are subjected to free radical copolymerization or polycondensation to obtain an emulsion A, and a silanol-based compound formed by hydrolysis of the silane coupling agent interacts with the surface of a fiber base material to enhance the adhesive force of microspheres on the fiber surface; meanwhile, organic silicon in the emulsion B is cured on the surfaces of the polymer microspheres and the fibers to form a film, so that the firmness of the fabric is further enhanced, and the washability of the fabric is remarkably improved while an excellent hydrophobic effect is ensured. According to the invention, simplification and batch production of the production process are effectively realized, and meanwhile, the requirements of modern industry on economic and green production are met.

The invention relates to the technical field of semiconductor chips, in particular to a semiconductor chip flushing device and a cleaning method thereof.The semiconductor chip flushing device comprises a cleaning table, a cleaning frame is arranged on the inner wall of the middle of the cleaning table, the cleaning table comprises a cleaning water recycling box, and the rear side of the cleaning water recycling box is fixedly connected with a U-shaped vertical plate; according to the wafer cleaning device, the cleaning table and the cleaning frame are arranged, rapid cleaning of wafers is achieved, one wafer is flushed while the other wafer is pre-flushed through circulating water, the cleaning efficiency is effectively improved, the cleanliness of the surfaces of the wafers is ensured, in addition, the cleaning efficiency is improved, and the cleaning efficiency is improved. According to the device, through the design of the transmission mechanism, the orientation of the wafer is rapidly switched, the overall working efficiency is further improved, meanwhile, through the recycling design of cleaning water, water resources are saved, the production cost is reduced, and the concept of green production is met.

The invention belongs to the technical field of peanut oil preparation methods, and particularly relates to a high-quality peanut oil squeezing and peanut protein production process. According to the method, through accurate regulation and control of technological parameters and innovation of key technologies, efficient and synchronous extraction of the grease and the protein is achieved, and the high-quality characteristics of the grease and the protein are maintained. The process disclosed by the invention not only breaks through the technical limitation of mutual restriction of the quality of the two in the traditional extraction, but also remarkably improves the full-component utilization efficiency of the peanut resources, and promotes the upgrading of the peanut industry to the full-component high-valued and green direction.

The invention provides an industrial manufacturing industry-oriented carbon asset full life cycle management method and system, and the method comprises the steps: carrying out the cross-link feature fusion processing through obtaining an original carbon activity data set of an industrial manufacturing whole process, and generating carbon footprint feature data; and calling a pre-trained deep learning model to perform carbon asset state evolution analysis on the carbon footprint feature data, predicting a carbon asset evolution path, generating a carbon asset optimization strategy set based on a prediction result, including equipment energy efficiency regulation and control and a production plan recombination strategy, and pushing the carbon asset optimization strategy set to an industrial manufacturing execution system. And triggering an automatic control instruction reconstruction operation to realize automation and intelligence of carbon asset management, thereby comprehensively and accurately mastering a carbon asset state and an evolution rule, formulating a scientific and effective optimization strategy, reducing carbon emission, improving energy utilization efficiency, and improving green production capacity of an enterprise.

The invention discloses a flue gas sulfur dioxide concentration prediction method based on variational mode decomposition and integrated learning, which comprises the following steps: for a flue gas SO2 concentration sequence collected in a flue gas desulfurization system, firstly decomposing the time sequence into a plurality of internal mode functions by using a variational mode decomposition method; then, a feedforward cascade neural network, a long short-term memory network and an autoregressive integral moving average model are used as base learners, and the dynamic characteristics of each modal function are learned; and finally, training element learners based on prediction results of all the base learners, and establishing an integrated model of each modal function. And recombining the predicted values of all the integrated models to realize the prediction of the SO2 concentration of the discharged flue gas. Accurate prediction of sulfur dioxide in discharged flue gas is beneficial to reduction of air pollution, prevention of formation of acid rain and protection of an ecological system and biological diversity. By adopting emission reduction measures and optimizing the production process in advance, enterprises can reduce the environmental protection treatment cost and improve the green production level.

The invention belongs to the technical field of ore magnetic separation recovery, and particularly relates to a rare earth functional material green production recovery device which comprises a machine body, one side of the machine body is fixedly connected with a fixed motor, the output end of the fixed motor is fixedly connected with a magnetic separation roller, the magnetic separation roller is in transmission connection with a conveying belt, the upper surface of the machine body is fixedly connected with a feeding port, and one side of the machine body is provided with a collecting frame. A baffle is rotationally connected into the machine body, a cooling assembly is arranged in the machine body and comprises a fixing plate fixedly connected into the machine body, a plurality of spraying holes are formed in the surface of the fixing plate and all face the magnetic separation roller, a pressure box is fixedly connected to one side of the machine body, and the side, penetrating through the machine body, of the fixing plate is fixedly connected with the pressure box. Water is stored in the pressure tank, the pressure tank is arranged in the pressure tank, and the cooling assembly is arranged, so that the problem that the magnetic separation quality is reduced due to magnetic property degradation of a permanent magnet material caused by the temperature rise effect of the magnetic separation roller is solved.

The invention relates to the technical field of tunnel engineering prefabricated part production, in particular to a large-diameter duct piece independent kiln assembly line conveying prefabricating method and system. S2, a reinforcement cage and an embedded part are installed; s3, concrete is precisely poured and vibrated; s4, pre-curing and surface treatment; s5, carrying out roller way type flow conveying; s6, hydration heat-driven dynamic maintenance is carried out; and S7, demolding and finished product detection. And S8, mold circulation. According to the large-diameter duct piece prefabricating production line, through technical innovation in multiple aspects of mold, conveying, maintenance, control and the like, the core technical problem in existing large-diameter duct piece prefabricating production is solved, high-precision, high-efficiency, low-energy-consumption and green production of large-diameter duct pieces is achieved, and the large-diameter duct piece prefabricating production line has remarkable technical advantages and wide application prospects and is suitable for large-diameter duct piece prefabricating production. The method can be widely applied to infrastructure construction projects such as shield tunnels, open caisson projects and underground comprehensive pipe galleries.

The invention discloses a deodorization flora liquid, a natural acquisition method thereof and application of the deodorization flora liquid in rubber primary processing, and belongs to the field of natural rubber processing, and the deodorization flora liquid comprises the steps of bacteria-containing soil sample screening, flora purification, flora stability testing and flora amplification culture. Wherein the bacteria-containing soil sample is from a whey waste dumping place, a secondary glue stacking place or soil which is subjected to whey treatment and has an odorless fermentation phenomenon; deodorizing flora purification comprises the following steps: by using whey waste obtained by rubber processing as a culture medium, removing antagonistic bacteria through multi-generation stable culture, detecting flora stability through high-throughput sequencing, and carrying out standing fermentation culture, so as to obtain a deodorizing flora solution with an efficient deodorizing effect. When being applied to deodorization treatment of rubber primary processing, the strain can obviously reduce the emission of malodorous gas in each production and processing link of natural rubber, has the advantages of wide flora source, simplicity in operation, no need of large-scale equipment and expensive reagents, low cost and the like, is expected to be popularized and applied in rubber primary processing, and realizes green production of natural rubber.

The invention belongs to the technical field of solid waste resource utilization, and relates to a method and system for preparing vaterite type calcium carbonate from waste incineration fly ash. The method comprises the following steps: by taking ammonium chloride as a leaching agent, leaching the waste incineration fly ash in a leaching agent solution, and then carrying out solid-liquid separation to obtain a calcium solution; and carrying out carbonation reaction on the calcium solution, an alkaline compound, sodium dodecyl benzene sulfonate and carbon dioxide under the conditions that the pressure intensity is 0.5-0.7 MPa and the temperature is 25-180 DEG C for 60-90 minutes to obtain the calcium carbonate. According to the method, high-quality vaterite type calcium carbonate can be prepared at a high conversion rate, the risk of fly ash is reduced, and mineralization of carbon dioxide is realized, so that waste is treated by waste, and green production is realized.

The invention relates to the technical field of polymer composite materials, and discloses an excimer skin-touch coating and a preparation method thereof.The coating is prepared from polyurethane dispersoid, organic silicon modified acrylic resin, a skin-touch additive, inorganic pigment filler, a solvent and a functional additive, the preparation method comprises the following steps: compounding base materials of polyurethane and organic silicon modified acrylic resin to form an interpenetrating network skeleton, then introducing a skin feeling auxiliary agent and a pigment filler step by step to realize gradient dispersion, and finally finishing system optimization through the synergistic effect of rheological regulation and functional auxiliary agents. Through a molecular structure interpenetrating network, intelligent process control and environmental protection technology integration, the core problems of easy touch attenuation, strong environmental sensitivity, auxiliary agent migration, pollution emission and the like of a traditional skin-touch coating are solved. The technology of gradient copolymerization anchoring, humidity dynamic compensation, closed-loop process control and the like is creatively fused, and multiple breakthroughs of long-acting skin feeling, high environmental adaptability and green production of the coating are achieved while excellent mechanical performance is kept.

The invention belongs to the technical field of environment-friendly intelligent manufacturing of sanitary disinfection products, and discloses a disinfectant concentration self-adaptive control and environment-friendly production optimization system and a disinfectant concentration self-adaptive control and environment-friendly production optimization method. Four invention points of a disinfectant concentration dynamic proportioning algorithm, a disinfection effect real-time verification model, a green production parameter optimization mechanism and a full-flow energy efficiency collaborative management and control framework are provided, and two innovative algorithms of concentration proportioning correction calculation and green production energy efficiency optimization are included. By constructing a concentration control-effect verification-energy efficiency optimization full-process collaborative closed loop, the disinfectant concentration control precision is remarkably improved, the disinfection effect verification timeliness is greatly enhanced, the energy consumption and environmental protection property in the production process are remarkably improved, and the method is suitable for production scenes of products such as liquid disinfectants, aerial fog disinfectants and disinfection gel and has wide application prospects. And the precision and greenization level of sanitary disinfection production is comprehensively improved.

The invention relates to the field of industrial sand drying and energy optimization control, in particular to a dried sand green production quality control system and method. Comprising the steps that sand material data and drying environment data are monitored and obtained in real time, the obtained sand material data and drying environment data are preprocessed to obtain preprocessed sand material data and drying environment data, a heat demand estimation and control algorithm is used for calculation to obtain a heat demand, and heat loss is dynamically corrected; based on the heat requirement, the heating power output is dynamically adjusted through a self-adaptive nonlinear heating power control algorithm; and calculating the heat recovery efficiency in the exhaust gas at each moment in real time by using an instantaneous heat recovery efficiency calculation algorithm based on the heat demand and the heating power output. The technical problems that in the existing heat drying process, heat losses are inevitably caused by conduction, convection and radiation losses, heat losses are subjected to exponential attenuation along with time, and the drying efficiency and energy consumption are affected are solved.

The invention discloses a novel solid-waste-based cementing material and a preparation method thereof, and relates to the field of industrial solid waste recycling and building material preparation. The novel solid waste-based cementing material mainly comprises the following raw materials: fly ash, blast furnace slag, carbide slag, mirabilite and calcium sulfate. The novel solid-waste-based cementing material is prepared from the raw materials through the processes of grinding, screening, uniform mixing, forming and curing. The geopolymer material is prepared by taking the solid waste fly ash and the blast furnace slag as raw materials and taking the carbide slag, the mirabilite and the calcium sulfate as excitants, the preparation process is simple, the prepared geopolymer building block is good in performance, a large amount of industrial solid waste can be consumed, environmental pollution caused by solid waste stacking can be relieved, and the environment friendliness is achieved. And mining of natural ore resources such as silicon and aluminum can be reduced, low-cost green production is achieved, and the method has wide market application prospects.

The invention relates to the technical field of casting coatings, and discloses an environment-friendly low-organic-matter-content water-based quick-drying casting coating which comprises the following components in parts by mass: 50-75 parts of a refractory filler, 8-15 parts of a binder, 2-6 parts of a coalescing agent, 1-5 parts of a quick-drying regulating agent, 0.5-3 parts of a wetting agent, 0.2-2 parts of a dispersing agent, 0.1-2 parts of a reinforcing agent and 10-30 parts of water. The refractory filler is selected from at least one of aluminum oxide, zircon sand, ceramic microbeads and nano silicon dioxide, and the binder comprises silica sol and an inorganic binder. By optimizing a bonding system and introducing an efficient quick-drying auxiliary agent and a low-organic-matter environment-friendly formula, the problems that an existing water-based casting coating is low in drying speed, low in production efficiency, high in organic matter content and poor in environment-friendly performance are solved, and quick drying, excellent sand burning resistance, high high-temperature stability and long service life are achieved. And the efficient and green production requirements of the modern casting industry are met.

The invention relates to an industrial process soft measurement method, in particular to an industrial process soft measurement method based on a hierarchical space-time enhanced quality related network. Performing normalization processing on the original data; a multi-head hierarchical time enhancement module (MHTE) is designed, local time characteristics are extracted through cross convolution, global time characteristic extraction is guided, and local and global characteristics are fused; a stacked encoder framework is constructed; introducing a mixing quality regularization mechanism combining a maximum information coefficient (MIC) and a Jaccard similarity coefficient (JSC); and optimizing the model through layer-by-layer pre-training and regression fine tuning. And the trained soft measurement model is utilized to carry out online quality prediction, and real-time monitoring and production strategy adjustment are carried out, so that the product quality and the production efficiency are improved, and green production is promoted. Simulation experiments prove that the method can efficiently extract dynamic spatio-temporal characteristics, and has high prediction precision and stability.

A production green quality comprehensive evaluation method for a distribution transformer comprises the steps of collecting data, forming a quality detection index matrix, a production energy consumption index matrix and a carbon footprint characteristic index matrix, screening procedures which have great influence on energy consumption by using a K-means clustering algorithm, constructing a production energy consumption index set, updating the production energy consumption index matrix, and evaluating the production green quality of the distribution transformer. And performing normalization processing on various index matrixes to form a normalized index data matrix. On the basis, respectively calculating the weight of each index by adopting a CRITIC method and an entropy weight method to obtain an overall CRITIC weight vector and an overall entropy weight vector; according to a minimum identification information principle, solving an optimal combination weight through a Lagrange multiplier method; and calculating a comprehensive evaluation score and a corresponding grade. The multi-dimensional data fusion mode can reflect the green production quality of the distribution transformer more comprehensively and accurately.

The invention relates to the field of microorganisms, in particular to burkholderia parakholderia with a plant growth promoting effect and application of the burkholderia parakholderia, and the burkholderia parakholderia comprises a 16S rDNA sequence shown in SEQ ID NO: 1 or a complementary sequence of the 16S rDNA sequence or a sequence which is at least 85% identical with the sequence shown in SEQ ID NO: 1. The application of the burkholderia paraburkholderia strydomiana Raa.R5 and the composition of the burkholderia paraburkholderia strydomiana Raa.R5 provided by the invention in promoting the growth of the crops has an important significance in improving the yield of the crops and promoting the green production of the agriculture.

The invention belongs to the technical field of building materials, and discloses a thickened rock-based mineral admixture and concrete. The thickened rock-based mineral admixture comprises the following raw materials in parts by weight: 75-90 parts of a rock component, 10-20 parts of an activating component and 2-5 parts of a modifying component. The rock component is ground carbonate cave slag and is selected from one of limestone, marble and dolomite. The high-activity thickening type rock-based mineral admixture is prepared by utilizing the characteristic of good hydrophilicity of the carbonate stone powder, so that the cohesiveness of the concrete is improved, and the cohesive force of the sprayed concrete and a tunnel rock wall is enhanced. Meanwhile, the hole slag produced in the tunnel excavation process is prepared into a homogenized admixture and aggregate, the homogenized admixture and aggregate are matched with other components to prepare sprayed concrete, and the sprayed concrete is completely applied to tunnel construction, so that the utilization rate of the tunnel hole slag reaches 100%, and the green production concept of taking and using the same to a tunnel is practiced; the method has the advantages of environmental protection, obvious economic benefit, stable concrete quality and the like.

The invention discloses a metal plate connecting or forming device and method based on aluminum foil electric explosion impact force, and relates to the technical field of high-speed forming and connecting of the metal plate machining technology, and the device comprises an upper pressing block, a lower insulating block, a base plate, an objective table and an impact force transmission block; an objective table is slidably arranged on the base plate; the lower insulation block is arranged on the base plate, a working cavity is formed in the lower insulation block, the impact force transmission block is placed in the working cavity, and an aluminum foil is placed at the top of the lower insulation block and connected with a pulse current discharge system; a supporting cantilever is installed on one side of the base plate, and the upper pressing block is arranged on the supporting cantilever. According to the aluminum foil electric explosion impact device, an original aluminum foil electric explosion impact device is improved, a machined metal plate can be better in forming quality or connecting quality, the surface of the plate can be kept clean, environmental pollution is reduced, and green production is achieved.

The invention discloses a method for preparing high-modulus sodium silicate and co-producing white carbon black from rice hull ash. The method comprises the following steps: crushing the rice hull ash, and acidizing to obtain purified rice hull ash powder; reacting the purified rice hull ash powder with 5wt%-15wt% of caustic soda generated by bipolar membrane electrolysis to prepare a sodium silicate solution; carrying out neutralization reaction on the sodium silicate solution and 1-15 wt% of sulfuric acid solution under the assistance of ultrasonic waves, and filtering to obtain silicon dioxide silica gel and filtrate; washing and drying the silicon dioxide silica gel to obtain a white carbon black product; and carrying out electrolytic treatment on the filtrate through a bipolar membrane electrodialysis system, and respectively recycling the recovered alkali liquor and acid liquor. According to the method, resource utilization of the rice hull ash and cyclic regeneration of the reaction medium are realized, and a green production process is formed.

The invention relates to an industrial process soft measurement method, in particular to a soft measurement method of a space-time fused hierarchical enhancement denoising auto-encoder network, which is familiar with an actual industrial process and determines a process variable and a quality variable; industrial data are collected and divided; performing data preprocessing; noise is added into the processed data, the processed data is input into an enhanced de-noising auto-encoder network (HEDAE) to learn effective information, and global enhanced features are extracted; and inputting global enhancement features extracted by the HEDAE to the GRU and the CNN at the same time, designing an interactive gating mechanism (TSIF), fusing time and space features, constructing a hybrid model to realize quality variable prediction, and verifying model prediction performance according to an evaluation index. On-line prediction is carried out through a soft measurement model, an industrial product quality variable prediction value is obtained, a production operation process is monitored and controlled in real time, and a production strategy is adjusted to ensure production efficiency, improve product quality and realize green production.

The invention discloses a high-yield gastrodia elata planting method based on Tilia brachypoda fungus material optimization and seed ramie stress resistance activation. According to the high-yield gastrodia elata planting method based on Tilia brachypoda fungus material optimization and seed ramie stress resistance activation, yield increase and quality improvement are achieved through fungus material composite strengthening treatment and a composite strain synergistic inoculation technology. The method comprises the following steps: (1) fermenting a tilia brachypoda substrate by lactobacillus plantarum and soaking in a nano-composite nutrient solution to form a high-activity bacterial material; (2) nitrogen-fixing bacteria, disease-resistant actinomycetes and armillaria mellea are mixed and inoculated according to the proportion of 3: 1: 1, nitrogen supply is improved, and the occurrence rate of black rot is reduced; 3) activating a GASA stress-resistant gene of the seed hemp through a pulsed electric field (5 kV / cm, 10 microseconds), and enabling the germination rate to reach 88.5% in combination with a calcium signal channel strengthening technology; according to the method, the yield per mu of gastrodia elata is increased by 30%-40%, the gastrodin content is increased by 30% or above, the chemical pesticide dosage is reduced by 55%, the strain passage purity is stable, the method is suitable for large-scale planting in multiple climate areas, and an innovative solution is provided for green production of traditional Chinese medicinal materials.

The invention discloses a method for improving the quality of phyllanthus emblica fruit juice through an enzymolysis-assisted pulsed electric field, which comprises the following steps: firstly, carrying out preliminary enzymolysis treatment on phyllanthus emblica fruits through a low-concentration compound enzyme solution to form micropores in the surfaces of cell walls; then, the pore diameter of the preliminarily formed micropore area is further expanded under the action of a pulsed electric field, the cell structure is destroyed to form a pore channel, through combined regulation and control of enzymolysis and electric field parameters, efficient release of micromolecular nutritional ingredients such as vitamin C, polyphenol substances, total flavonoids and monosaccharide is achieved through the synergistic effect of the enzymolysis and the electric field parameters, and the effect of improving the nutrient content is achieved. Meanwhile, the excessive precipitation of macromolecular polysaccharide is limited, the taste of the fruit juice is improved, the clarity of the fruit juice and the stability of nutritional ingredients are ensured, the consistency of the taste of the product is maintained, in addition, the enzyme dosage is effectively reduced, the safety problem caused by enzyme residues is reduced, the enzymolysis time and the pulse intensity are also remarkably reduced, and the production cost is reduced; the method meets the requirement of green production and is suitable for industrial large-scale application.

The invention discloses a novel dust removal and powder control system, and relates to the technical field of green production. On the basis of retaining an original collecting mechanism, the vortex cyclone cluster and the drainage fan are additionally arranged to form a combination of the vortex cyclone cluster and the drainage fan, meanwhile, the grid adjusting mechanism and the windproof collecting valve are additionally arranged in the vortex cyclone cluster, and the following effects are achieved through the combination of the grid adjusting mechanism and the windproof collecting valve; by means of the air flowing force, coarse particle materials in the raised dust can be controlled to be effectively recycled (noted: in the crushing production, the coarse particle materials are rare high-quality finished products), the raised dust displacement can be controlled to be reduced by more than 40% through the combination of the grid adjusting mechanism and the windproof collecting valve, and the energy consumption is lower, so that the environment-friendly and energy-saving effects are achieved.

The invention discloses an SAM hydrolase mutant and application thereof, the specific activation effect of halogen anions (F <->, Cl <->, Br <-> and I <->) on SAM hydrolase (containing MJ1651 wild type and mutant) is found for the first time, and the active sequence of the SAM hydrolase is F <-> > I <-> > Br <-> = Cl <->. According to the method, 400 mM of halide salt is added into a reaction system, so that the catalytic efficiency is improved in a breakthrough manner; the yield of wild type enzyme adenosine is improved by 20-300% (optimally, an F-system); the yield of the mutant R89C is soaring up by nearly 6 times under the action of KF; the activity of the immobilized enzyme is still more than 90% after the immobilized enzyme is repeatedly used for 5 times. The method is easy and convenient to operate, green production is achieved with water as the solvent (three wastes are reduced by 90%), the comprehensive cost is reduced by 41%-80 / kg, and an efficient solution is provided for industrial biological manufacturing of antiviral drug intermediates and the like.

The invention relates to a method for preparing (S)-chiral amine through asymmetric catalysis of imine reductase, and belongs to the technical field of biological pharmacy. Comprising the following steps that imine reductase catalyzes imine to be subjected to a reductive hydrogenation reaction under the conditions of coenzyme and a coenzyme regeneration system, and the (S)-chiral amine compound is generated. According to the method, imine reductase is utilized to catalyze imine asymmetric reduction to prepare the innovative drug (S)-chiral amine compound, and compared with a traditional chemical synthesis method, the method has the advantages of being high in reaction efficiency, good in stereoselectivity, mild in reaction condition, environmentally friendly and the like, and is a method meeting the green production requirement.

The invention relates to the technical field of smelting, in particular to a waste gas zero emission control method and device, electronic equipment and a storage medium. The method comprises: acquiring a waste gas demand request; the requirement type of the waste gas demand request is judged based on the waste gas demand; if the exhaust gas demand request comprises a temperature requirement, controlling the first exhaust gas supply; if the exhaust gas demand request does not include a request, controlling the second exhaust gas supply; before the first waste gas supply is controlled or the second waste gas supply is controlled, the method further comprises the steps that the dust concentration value is obtained; judging whether the dust concentration value is greater than a dust concentration threshold value or not based on the dust concentration value; and if the dust concentration value is greater than the dust concentration threshold value, controlling a dust removal module to work so as to carry out secondary dust removal. The device has the effect that waste gas can be recycled to achieve green production.

The invention discloses a method for utilizing waste acid water, relates to the technical field of titanium dioxide production, and aims to solve the technical problems that treatment of waste acid water generated in the titanium dioxide production process in the prior art is not environment-friendly and high in cost. The method comprises the following steps: S1, collecting acidic wastewater generated in the production process of producing titanium dioxide by a sulfuric acid method, and flocculating and layering the collected acidic wastewater; s2, filtering supernatant liquid of the layered acid wastewater, and conveying the filtered supernatant liquid to a hydrolysis section; s3, taking the acid wastewater as dilution water in a hydrolysis section, and concentrating the acid wastewater; and S4, concentrating the acidic wastewater obtained in S3 again, and returning the concentrated acidic wastewater to an acidolysis section for acidolysis. According to the method, the acid wastewater generated in titanium dioxide production is used as dilution water in the hydrolysis process, so that waste acid water is circulated, raw materials are saved, the production cost is reduced, and economic benefits are increased; the waste acid water is subjected to environment-friendly treatment, and the green production concept is met.

The invention relates to the technical field of ultraviolet absorbents, in particular to a synthesis method of a hexafluoropropylene oxide tripolymer, which comprises the following steps: S1, carrying out reaction on cyanuric chloride and aromatic hydrocarbon to obtain an intermediate product 1-chloro-3, 5-diaryltriazine, S2, carrying out reaction on cardanol and nitric acid to generate an intermediate product nitro cardanol, S3, carrying out reaction on 1-chloro-3, 5-diaryltriazine and 1-chloro-3, 5-diaryltriazine, and carrying out reaction on 1-chloro-3, 5-diaryltriazine and 1-chloro-3, 5-diaryltriazine to obtain the hexafluoropropylene oxide tripolymer. The preparation method comprises the following steps: (1) reacting 2, 5-diaryltriazine with nitrocardanol to obtain an intermediate product A, (2) reacting the intermediate product A with active iron powder and diluted hydrochloric acid to obtain an intermediate product B, and (3) continuously stirring the intermediate product B with sodium nitrite, nitrous acid and diluted hydrochloric acid to react, and adding a reducing agent and heating after the reaction is finished to obtain the target product cardanol modified triazine ultraviolet absorbent. The synthesis method of the triazine ultraviolet absorbent provided by the invention has the advantages of simple reaction conditions, green production and high weather resistance of the product.