79results about How to "Reduce processing size" patented technology

The invention discloses a compound constructed wetland tail water treatment system, which belongs to the field of sewage treatment technology. The system mainly includes a pretreatment and a constructed wetland system. The pretreatment portion comprises an aeration oxidation pool and an ecological gravel bed; The constructed wetland system fuses a design of stabilization lagoon, which combines a vertical current constructed wetland and a surface flow constructed wetland, and a stabilization lagoon is arranged in step in series; the tail water to be treated passes the aeration oxidation pool, the ecological gravel bed, the vertical current constructed wetland, the stabilization lagoon in order, and finally passes the surface flow constructed wetland and flows out. The system combines physical, chemical and biological means organically, thereby effectively improving the tail water quality, and the water quality of water outlet basically reaches the surface water environment standard III grade, and the water outlet can directly returns to river ecological environment for supplementing water and can be used as city miscellaneous water; the invention has the advantages of low investment, simple operation, low energy consumption, high environment benefit and ecological benefit, etc.

The invention discloses an intelligent substation and regulation and control center coordinative modeling method, comprising: standardizing the function of a system configuration tool of a substation automatic system; standardizing and expanding device and signal descriptions in an SCD (Substation Configuration Description) file; expanding a measurement model in a CIM / E (Common Information Model / E language) file; making mapping rules of IEC 61850 and IEC 61970 models; by reference to requirements of relay protection information standards and monitor system information standards, performing classified management on the information; automatically exporting the CIM / E file required by a regulation and control center on the side of an intelligent substation by using the system configuration tool, and performing checking; and providing the CIM / E model file for the regulation and control center in an offline or online manner and executing model splicing and storage processing. According to the method, the mapping and conversion from the 61850 model to the 61970 model are finished, the model and information sharing is realized, the model maintenance workload of the regulation and control center is reduced, and the working efficiency is improved.

The invention provides a method for extracting high-purity sodium sulfate and sodium chloride products from high-salt content wastewater in the coal chemical industry. The method comprises the following steps: firstly, pretreating the high-salt content wastewater in the coal chemical industry to reduce the hardness thereof and primarily concentrate the wastewater till the TDS content is about 30000mg / L, and primarily separating sodium sulfate and sodium chloride from the high-salt content wastewater in the coal chemical industry by a nanofiltration process to obtain nanofiltration concentrated water with the sodium sulfate as a main component and a nanofiltration produced water with the sodium chloride as a main component; secondly, removing a part of organic matters from the nanofiltration concentrated water to reduce the COD by an electrolytic oxidizing technology, and performing a hot crystallization technology and a freezing crystallizing technology to obtain a pure sodium sulfate product and a small amount of sodium chloride product; treating the nanofiltration produced water by a membrane concentration technology and a hot crystallizing technology to obtain a pure sodium chloride product. In the whole technical process, on the basis of achieving zero discharge of the wastewater, reuse of all water and maximized recycle of the salts in the wastewater are achieved, so that the economic efficiency is improved and the environment pollution is avoided.

The invention relates to a method for grading and utilizing waste material of sandstone system production, including the following steps: 1) sieving and washing are carried out; 2) slurry obtained by sieving is subject to separation of fine sand powder and slurry by virtue of a hydrocyclone grading device; 3) the fine sand powder is subject to high frequency sieving and dewatering, and the slurry is placed into a setting device, so as to further separate water and concentrated slurry; 4) water is returned to the washing step, and the concentrated slurry is subject to filter pressing or filtering and then is delivered to a waste material stock yard. In the method for grading and utilizing waste material of sandstone system production provided by the invention, a hydrocyclone grading device is added in slurry sand grading production process to separate fine sand powder and slurry, and a high frequency sieving dewater procedure is adopted, recycling of fine sand powder from slurry is realized, by adopting the method of the invention, more than 90% of useful material can be recycled from slurry, and more than 70% of recycling can be realized after waste water is purified.

The invention discloses a method and a system for treating agricultural non-point source pollutants in a hilly area by multilevel wetlands. The method comprises the following steps: A, designing and constructing a diversion facility and multilevel wetlands (including a grit chamber and drop water dams); B, configuring plants in ecological wetlands; C, stocking fish in wetlands; and D, managing and maintaining the ecological wetlands: 1) cutting and utilizing the wetland plants; 2) desilting; and 3) harvesting the fish. The diversion facility is connected with the grit chamber through a diversion covered channel / tube, the grit chamber is respectively connected with the diversion covered channel / tube and the first level wetland, the third level wetland is connected with the second level wetland and the fourth level wetland respectively through overflow channels, a wetland total water drainage opening is respectively connected with the fourth level wetland and a water drainage ditch, and all the wetlands are connected with the drop water dams through overflow channels. The method and the system have the advantages of low running cost, simplicity in operation, excellent treatment effect on non-point source pollutants nitrogen and phosphorus in a small basin or catchment area unit, and very good promotion and application prospect in subtropical hilly areas in the middle and lower reaches of the Yangtze River.

The invention discloses a sewage autotrophic nitrogen removal treatment method and device. The sewage is introduced into a pre-denitration reactor to remove dissolved oxygen; a part of the effluent is introduced into a shortcut nitrification reactor to convert NH4<+>-N into NO2<->-N; the other part of the effluent and the effluent from the shortcut nitrification reactor are simultaneously introduced into an anaerobic ammonia oxidation reactor to carry out anaerobic ammonia oxidation to remove nitrogen; a part of the effluent from the anaerobic ammonia oxidation reactor is discharged outside and the other part of the effluent from the anaerobic ammonia oxidation reactor flows back to the pre-denitration reactor to further remove nitrogen. According to the method and device disclosed by the invention, by combining the shortcut nitrification reactor and the anaerobic ammonia oxidation reactor, the urban sewage is treated, an efficient, low-consumption, low-cost and stable sewage treatment device for treating low-ammonia-nitrogen sewage is provided and the quality of the effluent is far superior to the requirements of national standard level A.

The invention discloses a method for treating polluted water by using solid waste steel slag. The present invention modifies steel slag, an industrial solid waste environmental protection material, and adopts steel slag adsorption method to treat eutrophic water and water polluted by heavy metals, which can effectively degrade TP, TN, As, Pb, COD in sewage etc., can effectively improve eutrophic water bodies and water bodies polluted by heavy metals, and can be directly applied to the treatment of urban rivers, lakes, and groundwater, effectively solving the current water pollution problems caused by urban construction and development.

The invention discloses a method of freezing, concentrating and treating saline wastewater. The method comprises the following steps: saline wastewater to be treated and a cooling agent are conveyed into a crystallizer to obtain a concentration solution of saline wastewater and solid ice crystals after heat transfer, and a part of the concentration solution of saline wastewater is expelled from the system; the solid ice crystals containing the concentration solution of saline wastewater are put into a solid-liquid separator to separate solid from liquid and the treated solid ice crystals are washed with water and put in an ice-melting jar to obtain chilled water after melting. The preparation method can achieve continuous operation at normal pressure or low pressure condition and is low in the requirement for devices; the cooling agent and the saline wastewater are in direct contact to transfer heat, so that the heat transfer efficiency is improved, the device size is effectively decreased and scale production can be achieved; according to technological requirements, saline water can be concentrated into different concentration levels, so that the treatment scale of the follow-up technologies is significantly decreased and the preparation method is good in adaptability; the preparation method is wide in application range and can be widely used in chemical industry (such as gasifier black water and wastewater treatment, and the like), sea water desalination, and the like.

The invention relates to the field of sewage treatment, and specifically relates to a coal gasification sewage comprehensive treatment method. The method comprises the following steps: flocculation sedimentation, cartridge filtration, electro-adsorption desalination, alkali-addition softening precipitation and pH regulation, precision filtration, gasification membrane ammonia removing, shortcut nitrification and denitrification, and deep carbonization and nitrification. According to the method, sewage is subjected to desalination treatment and recycling from the source, such that desalinated water is saved, production cost is reduced, treatment scale and investment of subsequent treatment equipment are reduced, and treatment effect is improved.

The invention relates to a toluene selective disproportionation and carbon 9 and above arene dealkytation method, wherein a hybrid dimethylbenzene and C9 above aromatic hydrocarbons reaction of high concentration paraxylene selective disproportionation is employed for producing benzene, toluene, and xylol combination in thermodynamic equilibrium state. The invention can be applied into industrial production of aromatic hydrocarbons.

The invention provides a process and system for treating high salinity wastewater in the coal chemical industry. The process comprises a secure treatment procedure, an ionic membrane concentration procedure and a reverse osmosis (RO) procedure, wherein ED water inflow is obtained after the high salinity wastewater in the coal chemical industry is treated by adopting the secure treatment procedure and has hardness not more than 50mg / L; an ionic membrane is adopted for concentration treatment on the ED water inflow; ED strong brine and ED dilute brine are obtained after the ED water inflow is treated by the ionic membrane concentration procedure; RO desalted water and RO strong brine are obtained by treating the ED dilute brine by adopting an RO membrane; and the RO strong water phase flows back to a water inflow section of the secure treatment procedure. The process has the beneficial effects that total recovery of water resources and salt can be achieved by treating the high salinity wastewater in the coal chemical industry by adopting an electrodialysis and RO coupling process, thus achieving zero discharge treatment of the high salinity wastewater in the coal chemical industry; and the whole process has high stability and reliability.

The invention belongs to the field of sewage treatment and relates to a method for comprehensive treatment on sewage produced through preparation of ethene from coal. The method comprises adding polyacrylamide into coal gasification section sewage, carrying out flocculation deposition, carrying out cartridge filtration through a filter, carrying out electro-adsorption desalination, mixing the electro-adsorbed concentrated water and MTO sewage mixed water, carrying out shortcut nitrification-denitrification treatment, carrying out nitrogen blowing to remove oxygen, carrying out anaerobic ammonia oxidation, carrying out sludge-water separation and carrying out carbonization and nitration. The method has a low operation cost. The treated product water has low COD content and does not contain ammonia nitrogen and nitrite ions. The method does not produce secondary pollution in the whole process.

The invention provides a method for innocent treatment and resource utilization of wastes, in particular a process and a method for pyrolyzing and burning any type of the wastes including industrial hazardous wastes, medical wastes, urban domestic wastes, urban domestic sludge, bio-straws and the like. The method adopts a high-temperature flue gas pyrolysis rotary kiln technique, a high-temperature flue gas and pyrolysis flue gas cycle burning technique, and a molding burning technique. The method has the advantages of wide adaptable range, strong processing ability, safety, reliability, low running cost, and advanced various economic technique and environmental protection indexes.

The invention relates to an advanced treatment and recycling system and process for fluorine-containing wastewater in the electronic industry. The system comprises an adjusting tank, a first multi-medium filter, an activated carbon filter, a softening device, a filtering water tank, a security filter, an RO system, a fluorine-containing wastewater temporary storage tank, a high-concentration fluorine-containing wastewater primary chemical mixing system, a high-concentration fluorine-containing wastewater secondary deep fluorine removal system, a second multi-medium filter, a fluorine removal resin tower and a discharge tank which are sequentially connected through pipelines, the adjusting tank is connected with a fluorine-containing wastewater inlet pipe, and the discharge tank is connected with a standard-meeting discharge pipe. The process comprises the following steps: 1, fluorine-containing wastewater adjusting; 2, reverse osmosis filtering; 3, high-concentration fluorine-containing wastewater primary chemical mixing; 4, secondary deep defluorination of the high-concentration fluorine-containing wastewater; and 5, fluorine removal using a resin. The advanced treatment and recycling of the fluorine-containing wastewater in the electronic industry are realized by adopting a process of combining RO concentration, two-stage chemical mixing, addition of a fluorine removal agentand fluorine removal resin.

The invention provides a thermal power plant desulfurization wastewater resource utilization system and method with low reagent consumption. The system comprises a flocculent precipitation unit, a filtering unit, a bipolar membrane electrodialysis unit and a concentrated water nanofiltration unit which are sequentially connected in series. The bipolar membrane electrodialysis unit adopts a seven-chamber bipolar membrane electrodialysis assembly unit; the bipolar membrane electrodialysis unit is divided into seven different chambers by a bipolar membrane, an anionic membrane, a cationic membrane, an anionic membrane, a cationic membrane and a bipolar membrane which are arranged in sequence; each chamber is respectively connected with an anolyte circulating box, an acid circulating box, a desulfurization wastewater circulating box, a concentrated water circulating box, a salt circulating box, an alkali circulating box and a catholyte circulating box; the filtering unit is connected withthe desulfurization wastewater circulating tank, the concentrated water circulating tank is connected with the concentrated water nanofiltration unit, the wastewater circulating tank is connected withthe fresh water recycling pipeline, the acid circulating tank is connected with the acid recycling pipeline, and the alkali circulating tank is connected with the alkali recycling pipeline. The system has extremely important significance for realizing zero discharge of desulfurization wastewater, reducing discharge of solid wastes and practically protecting the water ecological environment.

The invention provides a point cloud information and deep learning combined obstacle detection method. The method comprises the following steps: acquiring a point cloud image containing depth information; filtering the image, and removing outliers of a distribution edge to obtain preprocessed point cloud information; extracting and filtering ground information in the point cloud information; based on the residual point cloud information, carrying out preliminary obstacle detection, and determining a grid where an obstacle is located; judging the preliminarily detected obstacle by using a pre-trained deep learning model, and determining the type of the obstacle; the defects that an existing robot is single in obstacle detection mode and cannot comprehensively sense obstacles can be overcome, various obstacles encountered by the indoor inspection robot can be effectively detected in real time, and operation safety of equipment is guaranteed.

The invention relates to a method for aromatic co-production and mainly solves the problems of low concentration of paraxylene, high treatment and circulation amount of aromatics, strict requirements and energy consumption of reaction raw materials and the like in the mixed dimethylbenzene during paraxylene production in the prior art. Mixed raw materials from a reforming unit are separated; C9, aromatics with over 9 carbon atoms, and methylbenzene enter a disproportionated and alkyl transfer process unit of the methylbenzene, the C9 and the aromatics with over 9 carbon atoms for a dealkylation reaction to generate a second strand of benzene, a second strand of methylbenzene and a second strand of C8 aromatics; the methylbenzene enters a methylbenzene selective disproportionated process unit for a methylbenzene selective disproportionated reaction to generate the C8 aromatics and a benzene mixture flow which contains the paraxylene to obtain third strand C8 aromatics, a third strand of methylbenzene and a third strand of benzene; low-concentration C8 aromatics are mixed and fed into an adsorption separated unit to obtain the C8 aromatics containing high-concentration paraxylene; and the C8 aromatics containing high-concentration paraxylene are fed into a crystallizing and separating unit to obtain a paraxylene product and a fourth strand of aromatics. With the technical scheme, the invention better solves the problem and can be used for paraxylene industrial production.

The invention relates to a method for producing paraxylene, which manly solves the problems of low concentration of paraxylene in mixed xylene during paraxylene production, large circulating load of aromatic hydrocarbon treatment, strict requirements for raw reaction materials, high energy consumption and the like existing in the prior art. The method comprises the following steps of: separating mixed raw materials from a reforming unit; introducing separated C9 and heavier aromatic hydrocarbons into a C9 and heavier aromatic hydrocarbon dealkylation processing unit for a dealkylation reaction to produce a second part of benzene, a second part of methylbenzene and a second part of C8 aromatic hydrocarbon; introducing methylbenzene into a methylbenzene selective disproportionation processing unit for a selective disproportionation reaction of methylbenzene to produce a C8 aromatic hydrocarbon and benzene flow including paraxylene so as to obtain a third part of C8 aromatic hydrocarbon,a third part of methylbenzene and a third part of benzene; after mixing the low-concentration C8 aromatic hydrocarbon, introducing the mixture into a crystallization and separation unit to obtain C8 aromatic hydrocarbon including paraxylene with high concentration; and introducing the C8 aromatic hydrocarbon including paraxylene with high concentration into an absorption and separation unit to obtain the product of paraxylene. With the technical scheme, the invention well solves the problems and can be applied to the industrial production of paraxylene.

The invention belongs to the optical fiber sensing technology field and especially relates to a micro-fiber extrinsic-type Michelson sound pressure sensor with a common optical path structure. The sensor is formed by a sound pressure sensitive diaphragm, a diaphragm support structure, a sensor pedestal, a first high reflecting film, a second high reflecting film, a glass casing pipe, an optical fiber collimating lens, an optical fiber sleeve, and a single mode fiber. The sound pressure sensitive diaphragm is fixed to the diaphragm support structure. The diaphragm support structure is fixed tothe upper surface of the sensor pedestal. The external diameters of the diaphragm support structure and the sensor pedestal are the same. The internal middle areas of the diaphragm support structure and the sensor pedestal have circle through holes. The diameter of the through hole of the diaphragm support structure is greater than the diameter of the through hole of the sensor pedestal. Through adopting the common optical path structure, sensor signal fading caused by polarization fading can be avoided without using a Faraday polariscope so that the stability of a detection result is ensured,and good processing consistency is possessed.

The invention relates to a method of treating traditional Chinese medicine wastewater by utilizing modified fly ashes and a photocatalyst. The method specifically comprises the following steps of: modifying fly ashes by utilizing an activator, roasting, and the like, wherein each modified fly ash is used for carrying out original fluid pre-treatment onto the traditional Chinese medicine wastewater in sequence; carrying out photocatalytic degradation onto the pre-treated traditional Chinese medicine wastewater under radiation of sunlight, wherein the used photocatalyst is obtained by loading TiO2 / Cu2O with the fly ashes; finally, carrying out flocculating settling onto the catalyzed water by a flocculating agent prepared by fly ashes. Fly ashes, waste scrap iron, industrial waste acid, and the like, are used as main materials, so that treatment cost of the traditional Chinese medicine wastewater can be effectively lowered, and secondary pollution can also be avoided; during treatment, the composite photocatalyst with efficient catalytic degradation ability in the sun is used, so that decomposition time of organic pollutants is effectively shortened, and the photocatalyst can be recycled for repeated catalysis by loading the photocatalyst with the fly ashes; wastewater treatment scale can be large and small, and ferric aluminum polysilicate can be prepared on the scene according to actually generated wastewater amount and characteristics of the wastewater.

The invention discloses an insoluble sulfur extraction method and an extraction system. The extraction system comprises a first-stage fluidized bed extraction tower, a first-stage cyclone separator, aliquid phase crusher, a second-stage fluidized bed extraction tower, a second-stage cyclone separator, a dryer, a gas-solid cyclone separator, a condensation separator and an extraction agent storagetank. The insoluble sulfur extraction system and the extraction method can improve the purity of the product, are high in thermal stability and product yield, are suitable for large-scale continuousproduction, and have the advantages of safety, reliability, low operation cost, remarkable energy-saving effect and the like.

The invention relates to a structure for implementing discrete Fourier transform (DFT) of 32-channel parallel data. In the invention, firstly, a full parallel structure is adopted, 32-channel parallel data is splitted into two 8-channel parallel data and a 16-channel data according to parity, secondly, a radix-2 butterfly algorithm is adopted to process the 8-channel parallel data, a radix-4 butterfly algorithm is utilized to process the 16-channel parallel data, finally the processed results of two 8-channel parallel data are multiplied by a constant coefficient, and addition and subtractionoperations are carried out with the processed result of the 16-channel parallel datum to obtain a DFT result of the 32-channel parallel data. The structure for implementing 32-channel parallel data DFT filters in a frequency domain, directly crosses over products, reduces delay time and amount of multipliers compared with a time domain multi-item filter method, decreases a processing scale of a field programmable gate array (FPGA) at the same time, improves hardware processing speed, is very suitable for processing high-speed and real-time digital signals, and can save hardware resource. The implementing structure can be completely utilized for carrying out inverse discrete Fourier transform (IDFT) on 32-channel parallel data.

The invention discloses a high-efficiency solid-liquid clarification and separation device. The device comprises a bottom bracket, a cylinder body, a flow guide device, an inclined plate, a mud scraping mechanism and a speed reducer, wherein the cylinder body is mounted on the bottom bracket, the speed reducer is arranged on the cylinder body, the flow guide device comprises a flow guide barrel and a reflecting plate, the reflecting plate is arranged below the flow guide barrel, the top of a first-stage flow guide barrel is communicated with a sewage / grey water inlet, the top of a second-stageflow guide barrel is connected to the outer side of a lower end opening of a first-stage flow guide barrel, and auxiliary scraping arms are arranged on the upper surface of a first-stage reflecting plate and the upper surface of a second-stage reflecting plate respectively, a slag / sludge concentration hopper is arranged at the bottom of the cylinder body, a scraping arm is arranged on a bottom plate of the cylinder body, and the scraping arm and auxiliary scraping arms jointly form the sludge scraping mechanism. According to the invention, the specific surface area is increased, the treatmentload is increased, the diffusion flow is enhanced by the flow guide reflection device, the water distribution is more uniform, the flow velocity is more stable, the liquid medicine is more fully mixed, and the clarification and separation efficiency is greatly improved.

The invention discloses a treatment method of gold and silver pyrite, and belongs to the field of resource development and metal smelting. The method comprises the following steps: (1) performing oxidation smelting: performing oxidation smelting on the gold and silver pyrite to obtain high-temperature smoke, ferrous oxide melting slag and gold and silver sulfurous iron; (2) treating the high-temperature smoke: recovering after heat of the high-temperature smoke obtained by the step (1) to prepare sulfuric acid, wherein tail gas from acid production is discharged up to the standard; (3) treating the smelting slag: casting the ferrous oxide melting slag obtained by the step (1) into blocks, naturally cooling to obtain ferrous oxide slag blocks and selling; (4) converting the obtained gold and silver sulfurous iron obtained by the step (1) to obtain converting slag and gold and silver alloy, returning the converting slag to the step (1) for oxidation smelting together with the gold and silver sulfurous iron, and selling the gold and silver alloy. The method has the advantages of short process flow, small investment and land occupation, high production efficiency, low production cost, high gold and silver recovery rate, clean and environment-friendly production process and the like.

The invention discloses a hydraulic aerobic biological algae removal boat which comprises a two-bateau ship and a hydraulic aerobic algae removal device arranged on the two-bateau ship. The hydraulic aerobic biological algae removal device which comprises 24-48 hydraulic aerobic algae removal units and a secondary sedimentation tank on which the hydraulic aerobic algae removal units are arranged, the upmost layer of the hydraulic aerobic algae removal unit is provided with a water intake pipe which is connected with a submersible pump arranged in water, a drainpipe is arranged at the outer side of the secondary sedimentation tank and connected with a diffuser, each hydraulic aerobic algae removal unit comprises a water tank, filling and a negative pressure generator, a water intake region is arranged at one end of the water tank, the filling is arranged between the inhalant region and the negative pressure generator, a water sucking mouth of the negative pressure generator is arranged in a position 25 mm from the bottom of the water tank in the hydraulic aerobic algae removal unit, a drainage outlet of the negative pressure generator is arranged a water intake region at the other end of the next layer of the hydraulic aerobic algae removal unit, and a drainage outlet of the negative pressure generator of the undermost layer of the hydraulic aerobic algae removal unit is arranged in the secondary sedimentation tank.

The invention discloses a method of freezing, concentrating and treating saline wastewater. The method comprises the following steps: saline wastewater to be treated and a cooling agent are conveyed into a crystallizer to obtain a concentration solution of saline wastewater and solid ice crystals after heat transfer, and a part of the concentration solution of saline wastewater is expelled from the system; the solid ice crystals containing the concentration solution of saline wastewater are put into a solid-liquid separator to separate solid from liquid and the treated solid ice crystals are washed with water and put in an ice-melting jar to obtain chilled water after melting. The preparation method can achieve continuous operation at normal pressure or low pressure condition and is low in the requirement for devices; the cooling agent and the saline wastewater are in direct contact to transfer heat, so that the heat transfer efficiency is improved, the device size is effectively decreased and scale production can be achieved; according to technological requirements, saline water can be concentrated into different concentration levels, so that the treatment scale of the follow-up technologies is significantly decreased and the preparation method is good in adaptability; the preparation method is wide in application range and can be widely used in chemical industry (such as gasifier black water and wastewater treatment, and the like), sea water desalination, and the like.

The invention discloses a field centralized well-rotting fertilizer transformation utilization method of straw. According to the method, agricultural straw is harvested together and is smashed when a crop is reaped, and then the agricultural straw is subjected to on-the-spot centralized well-rotting processing. During the well rotting of the straw, soil, calcium superphosphate, urea, water and compound microbial inoculums (including trichoderma reesei, aspergillus niger, saccharomyces cerevisiae and bacillus subtilis) are added into the straw according to a certain proportion; an obtained mixture is mixed, and then the obtained mixture is covered with a film; afterwards, the obtained mixture is further fermented; the straw can be completely well rotted after 17 to 23 days; the mixture is laid open and aired, and then is subjected to on-the-spot fertilizer transformation utilization. The method is simple in treatment way, convenient to operate and low in cost, is easily learned and easily understood by a peasant, has stronger popularization value and application value; the realization of the resource transformation utilization of the straw is facilitated.

The invention discloses a data access permission updating method, which comprises the following steps of: analyzing a file change event to obtain a target original file and target user information of an executor; selecting representative user information from each piece of user information except the target user information in an authorized user information group of the target original file, wherein the representative user information is used for decrypting the original ciphertext re-encryption key; decrypting a pre-stored first re-encrypted ciphertext packet by using the decrypted original plaintext re-encryption key to obtain a first ciphertext fragment of a mask ciphertext file corresponding to the target original file; performing recovering according to the first ciphertext fragment to obtain the mask ciphertext file, and generating a second random number; and calculating a target plaintext re-encryption key according to the mask ciphertext file and the second random number, and synchronizing the target plaintext re-encryption key to other user information except the target user information. According to the method, the data processing scale is reduced, and the data access permission updating burden is relieved. The invention further discloses a device, equipment and a storage medium, which have corresponding technical effects.