291 results about "Biofuel" patented technology

The “Industrial Digestive System” encapsulates a novel paradigm in waste management and resource recovery, bridging the gap between sophisticated computational intelligence and industrial automation. The hardware component replicates the natural digestive system's efficiency in processing a diverse range of inputs, including municipal and industrial waste, transforming them into valuable outputs like biofuels, chemicals, and advanced composite / conglomerate materials. This process is achieved through a series of mechanized operations. Complementing the hardware, the software facet of the invention is rooted in advanced machine learning and optimization algorithms that optimize multivariable functions for the most efficient conversion of input to resources, orchestrating the transformation from varied waste streams, elements, and molecules into solid, liquid, and gaseous outputs. The result is an automated, intelligent manufacturing machine that enhances product quality and operational efficacy. “The Industrial Digestive System” can be seen as a new branch of cybernetics, a cyber-physical system inspired by nature.

The invention provides a fleet route allocation optimization method and system, and the method comprises the steps: firstly obtaining ship data of each ship in a fleet and route data of each route, and taking the minimization of the total usage amount of biofuel of the fleet in a planned period and the minimization of the total economic loss caused by not meeting the maximum deployment number of the routes as targets; the method comprises the following steps: respectively establishing a first objective function and a second objective function under a plurality of constraint conditions which are established by taking a ship total number limit and a fuel consumption limit which are deployed in each ship route every year, a ship route change total number limit of a fleet in any year, and a CII grade standard limit of each ship as constraints; and constructing a multi-objective optimization mathematical model based on the first objective function and the second objective function, calculating the multi-objective optimization mathematical model by adopting a non-dominated sorting genetic algorithm to obtain a Pareto optimal solution set, and selecting a final fleet route allocation scheme according to the Pareto optimal solution set. And dual minimization of the total usage amount and the total economic loss of the biofuel is realized.

A process and apparatus for producing biofuel from biorenewable feedstock is disclosed. The process comprises hydrotreating the biorenewable feed stream in a hydrotreating reactor to hydrodeoxygenate a biorenewable feed stream to provide a hydrotreated effluent stream. The hydrotreated effluent stream is separated in a hot separator into a hot separated vapor stream and a hot separated liquid stream. A hydroisomerization feed stream is taken from the hot separated liquid stream and hydroisomerized in a hydroisomerization reactor to provide a hydroisomerized stream. All or a portion of a return stream taken from the hot separated vapor stream is recycled to the hydroisomerization reactor. The disclosed process and apparatus minimize the carryover of the normal C16 to the biofuel and maximizes the hydroisomerization of n-paraffin hydrocarbons in the hydrotreated effluent stream to produce a biofuel which meets the biofuel specification without affecting or compromising the biofuel yield.

A process and apparatus for producing biofuel from biorenewable feedstock is disclosed. The process comprises hydrotreating the biorenewable feed stream in a hydrotreating reactor to hydrodeoxygenate a biorenewable feed stream to provide a hydrotreated effluent stream. The hydrotreated effluent stream is separated in a hot separator into a hot separated vapor stream and a hot separated liquid stream. A hydroisomerization feed stream is taken from the hot separated liquid stream and hydroisomerized in a hydroisomerization reactor to provide a hydroisomerized stream. All or a portion of a return stream taken from the hot separated vapor stream is recycled to the hydroisomerization reactor. The disclosed process and apparatus minimize the carryover of the normal C16 to the biofuel and maximizes the hydroisomerization of n-paraffin hydrocarbons in the hydrotreated effluent stream to produce a biofuel which meets the biofuel specification without affecting or compromising the biofuel yield.

The utility model relates to the technical field of biofuel, in particular to a biofuel filtering device which is characterized in that the upper end of a base is fixedly connected with an outer box, the upper side of the interior of the outer box is rotatably connected with a rotary filtering box, and the interior of the rotary filtering box is rotatably connected with a filtering round frame; according to the device disclosed by the utility model, biofuel can be injected into the filter groove in the front side of the interior of the rotary filter box under the action of the feed pipe and is filtered through the filter screen plate, and the filtered biofuel can be discharged through the discharge pipe; after filtration, a worm can drive a worm gear to rotate by rotating a motor, so that a filter screen plate after biofuel filtration can rotate, the filter screen plate can be washed through a cleaning pipe, and the cleaned filter tank is subjected to air drying treatment through a fan; therefore, the rotary filter box can rotate and continuously filter the biofuel.

The utility model discloses a boiler biofuel feeding device which comprises a feeding hopper, and a beating assembly for beating the inner wall of the feeding hopper is arranged in the feeding hopper. The beating assembly comprises a mounting shell fixedly mounted in the feeding hopper, a rotating shaft rotationally connected to the interior of the mounting shell and a rotating motor fixedly mounted on the periphery of the feeding hopper, the rotating shaft penetrates through the feeding hopper and is rotationally connected with the rotating motor, and an inclined disc is fixedly arranged on the periphery of the rotating shaft; a first sliding base is fixedly installed on the periphery of the rotating shaft, and a second sliding base is fixedly installed at the end, opposite to the first sliding base, of the periphery of the rotating shaft. According to the feeding hopper, the inner wall of the feeding hopper can be continuously vibrated through the beating assembly, the adhesion of biofuel on the inner wall of the feeding hopper is reduced, meanwhile, the bridging or stacking phenomenon of the biofuel can be scattered, the blocking or adhesion phenomenon of the feeding hopper during feeding is reduced, and the using smoothness of the feeding hopper is improved.

The invention discloses an aviation fuel gear pump performance prediction method based on lumped parameters, which relates to the technical field of aviation hydraulic simulation, and comprises the following steps: dividing fluid working cavities according to the geometric structure of a fuel gear pump, defining the flow exchange relation and the pressure change relation among the fluid working cavities, and establishing a coupling calculation path; forming a basic prediction model; the method comprises the following steps: extracting a biofuel blending ratio and a water content parameter according to a fuel component parameter input in real time, comparing the biofuel blending ratio and the water content parameter with a preset blending ratio threshold to trigger a corresponding correction rule, generating a compensation coefficient, and generating an elastic modulus parameter in combination with the water content parameter and the compensation coefficient; and inputting a preset working condition parameter and an elastic modulus parameter into the basic prediction model, calculating mass flow exchange data through the flow exchange relationship, driving the pressure change relationship to solve, and outputting an initial pressure distribution vector. Through the elastic modulus parameter dynamic generation step, the problem of physical property parameter static correction distortion under the variable component working condition is solved.

The subject invention provides compositions and methods for reducing the carbon footprint of producing biofuels. Microbe-based soil treatment compositions are utilized to reduce greenhouse gas emissions resulting from the agricultural practices of producing feedstock crops.

The utility model relates to the technical field of biofuel, and discloses biofuel production equipment which comprises a feeding pipe, a smashing cavity used for smashing is fixedly installed at the bottom of the feeding pipe, and a conveying pipe used for conveying is fixedly installed at the bottom of the smashing cavity. A feeding auger used for conveying materials is rotatably installed in the material conveying pipe, one end of the feeding auger penetrates through the material conveying pipe and is fixedly connected with the output end of the driving motor, and a mixing bin used for mixing is fixedly installed at the other end of the material conveying pipe; according to the device, through mutual cooperation of the structures, one-stop pre-treatment can be carried out on biofuel before finished product processing is carried out on the biofuel, the tedious step of manual transfer is omitted, the production efficiency is effectively improved, the production time is saved, subsequent biofuel processing and using are more convenient, and the device is more practical.

The present technology relates to biofuels, and more particularly, to biomass-based diesel from olefin oligomers. Diesel fuels with cetane number of 49 or greater are prepared by blending hydrocarbons produced by olefin oligomerization with renewable diesel, resulting in a blended fuel that has a lower cloud point than the cloud point of the renewable diesel. A different aspect relates to an integrated process for lipid HDO and olefin oligomerization wherein the propane coproduct of lipid HDO is subjected to dehydrogenation to produce a vapor stream having propylene and hydrogen. The propylene is subsequently oligomerized to iso-olefins and the iso-olefins are combined with the lipid feed for hydrogenation in the HDO reactor.

The invention discloses a Mo in-situ doped transition metal layered double hydroxide derivative catalyst. The Mo in-situ doped transition metal layered double hydroxide derivative catalyst is of a nanometer two-dimensional layered structure; nitrate, aluminum nitrate and molybdate are used as raw materials, and a series of nano flaky Mo-X / Al2O3 composite metal oxide catalysts with high activity, high selectivity and high stability are obtained through co-hydrothermal precipitation and one-step roasting reduction. The invention further discloses a preparation method and application of the Mo in-situ doped transition metal layered double hydroxide derivative catalyst. According to the invention, macromolecules in biomass or biomass waste can be effectively depolymerized and liquefied into high-calorific-value bio-oil, so that the effect of turning waste into wealth from oriented conversion of the waste into bio-fuel is realized, and meanwhile, the bidirectional positive effects of avoiding environmental pollution caused by direct emission of the biomass waste and realizing comprehensive utilization of resources are realized; and a path with more economic benefits is provided for conversion from biomass wastes to renewable energy sources.

The invention discloses a method for improving the fermentation performance of clostridium aerovorans and application of the clostridium aerovorans, and according to the method, an effective amount of methionine or a derivative thereof is added into a fermentation culture medium of the clostridium aerovorans to completely replace expensive complex organic nitrogen sources such as yeast extracts. The method successfully solves the three technical bottlenecks of slow biomass accumulation, low ethanol yield and dependence on expensive nitrogen sources in the fermentation process of the clostridium aerovorans by utilizing synthesis gas or CO2 / H2 mixed gas. Experiments prove that methionine or a derivative thereof can synergistically promote growth metabolism of thalli and a synthesis path of a product, so that the gas conversion efficiency of a carbon source is remarkably improved and metabolism is guided to flow to ethanol synthesis while the growth rate and the final biomass of the thalli are improved, and thus the production capacity of alcohols is synchronously enhanced. The method is simple in process and remarkable in effect, and an efficient and economical new strategy is provided for reducing the production cost of biofuel and promoting industrial application of a synthesis gas biorefinery technology.

Compositions and methods for a hybrid biological and chemical process that captures and converts carbon dioxide and / or other forms of inorganic carbon and / or CI carbon sources including but not limited to carbon monoxide, methane, methanol, formate, or formic acid, and / or mixtures containing CI chemicals including but not limited to various syngas compositions, into organic chemicals including biofuels or other valuable biomass, chemical, industrial, or pharmaceutical products are provided. The present invention, in certain embodiments, fixes inorganic carbon or CI carbon sources into longer carbon chain organic chemicals by utilizing microorganisms capable of performing the oxyhydrogen reaction and the autotrophic fixation of CO2 in one or more steps of the process.

The present invention relates generally to the generation of bio-products from organic matter feedstocks. More specifically, the present invention relates to improved methods for the hydrothermal / thermochemical conversion of lignocellulosic and / or fossilized organic feedstocks into biofuels (e.g. bio-oils) and / or chemical products (e.g. platform chemicals).

The invention discloses a cleavable polysaccharide monooxygenase mutant FpLPMO9A-N160T and application of the cleavable polysaccharide monooxygenase mutant FpLPMO9A-N160T, and belongs to the field of enzyme engineering. The optimal temperature of the lytic polysaccharide monooxygenase mutant FpLPMO9A-N160T disclosed by the invention is 50 DEG C, the optimal pH is 5, and the enzymatic activity of the mutant FpLPMO9A-N160T is 10.8 times that of a wild type. The thermal stability of the lytic polysaccharide monooxygenase mutant is remarkably improved, IC50 is 101.1 min at the temperature of 50 DEG C and is 1.57 times that of a wild type, the activity of the mutant can be kept for a longer time at the high temperature, and better thermal stability is shown. The improvement has important significance on the expression of the LPMO in industrial application, especially in environments requiring high-temperature operation, such as biomass conversion, biofuel production and other processes. The higher thermal stability not only prolongs the service life of the enzyme, but also improves the efficiency and reliability of the enzyme in practical application.

The invention belongs to the field of biofuel preparation through grease hydrogenation, and provides a catalyst for biofuel preparation through waste grease one-step hydrogenation and a preparation method of the catalyst. The catalyst is a non-supported NixMoyWz-kHY catalyst, and the preparation method of the catalyst comprises the following steps: uniformly mixing a nickel source, a molybdenum source and a tungsten source according to a certain proportion, adding deionized water and a reaction aid ethylene glycol, dissolving, heating, stirring, adding an ammonia water-ethanolamine mixed solution, complexing, steaming until the pH value of the solution is 7-8, and filtering to obtain the catalyst. And adding a certain amount of HY molecular sieve powder, methyl cellulose (MC) and citric acid into the solution, filtering the reaction solution, drying the filter cake at 120 DEG C, performing extrusion molding, and roasting to obtain the catalyst. The catalyst provided by the invention effectively solves the problems of high oxygen content, difficulty in deep isomerization and the like in the waste oil and fat, has the functions of hydrodeoxygenation, cracking and isomerization at the same time, and realizes one-step conversion of the waste oil and fat into biological aviation kerosene and biodiesel. Besides, the non-supported catalyst adopted by the invention has high-activity center density, the problems of aging and shedding of the carrier are not needed to be worried about, and the preparation method of the catalyst is simple, environment-friendly and pollution-free, and meets the requirements of industrial preparation.

A method for treating grain having starch and non-starch carbohydrates, wherein the starch is present in an amount of at least 10% by weight based on the dry weight of the grain. Contacting the grains with a solution containing at least one alpha-hydroxysulfonic acid; and reacting under acid hydrolysis conditions to produce a product suitable for the production of chemicals and / or fuels.

A method of capturing and disposing of fats, oil and / or grease (“FOG”) is disclosed. The method includes: providing a porous container formed of a porous fabric, wherein the porous container is filled with an absorbent material capable of absorbing a quantity of the fats, oil, and / or grease through the porous fabric of the porous container; placing the porous container and the absorbent material contained therein in a grease trap; allowing the grease trap to fill up with water and a mixture of fats, oil, and / or grease; removing the fats, oil, and / or grease from the grease trap after a period of time, while the water remains in the grease trap; and transporting the fats, oil, and / or grease.

The application discloses a method for preparing a hydrogenation deoxidation intermediate by using conjugated fatty acids and application thereof, and belongs to the technical field of oil production biofuel. The method comprises the following steps: (1) subjecting conjugated fatty acids and a dienophilic monomer to a Diels-Alder addition reaction to obtain an addition product; and (2) removing unreacted raw materials from the addition product, so that the hydrogenation deoxidation intermediate is obtained. The method breaks the traditional idea of deoxidation first and isomerization later, and instead adopts the idea of "structure modification first and hydrogenation deoxidation later" to prepare the hydrogenation deoxidation intermediate, so that the hydrogenation isomerization process can be omitted, the generation of cracking products is reduced, the content of isomerization products in the biodiesel is significantly improved, and higher-quality biofuel is obtained.

The utility model relates to the technical field of alcohol-based fuel mixing, and discloses an alcohol-based biofuel additive blending and mixing device which comprises a mixing and blending tank body, the upper end of the mixing and blending tank body is symmetrically provided with retarding boxes pairwise, the upper end of each retarding box is fixedly provided with a conical feed port, and the lower end of each retarding box is provided with a feed port. According to the alcohol-based bio-fuel additive feeding device, the two buffer plates which are obliquely symmetrical to each other and slide up and down for speed reduction adjustment are arranged, so that buffering and speed reduction can be conducted on alcohol-based bio-fuel additives fed from the conical feeding port, and the alcohol-based bio-fuel additives fed from the conical feeding port are fed into the buffer plates; the situation that alcohol-based biofuel additives with different chemical properties are not fully mixed due to too fast discharging is avoided, and meanwhile, the cleaning scraping plate tightly attached to the inner side wall of the mixing and blending tank body is arranged, so that the alcohol-based biofuel additives precipitated and adsorbed on the inner wall of the tank body can be scraped in time during mixing and blending.

The invention relates to the technical field of biofuels, and discloses an aviation kerosene biological alternative fuel based on multi-objective optimization, which is characterized in that a comprehensive selection index system comprising density, kinematic viscosity, thermodynamic characteristics (lower calorific value and hydrogen-carbon ratio) and molecular weight is established based on a multi-objective optimization model constructed by a genetic algorithm; the invention discloses a biological fuel formula for replacing RP-3 aviation kerosene by optimizing the design of biological alternative fuel components, the biological alternative fuel is prepared from the following components in parts by volume: 70-80 parts of second-generation biodiesel, 10-15 parts of tetrahydrofuran and 7-15 parts of isopropanol, the components are easy to obtain, the production process is simple, and the biological alternative fuel is suitable for large-scale production. The second-generation biodiesel, tetrahydrofuran and isopropanol are used as raw materials, the obtained biofuel has low kinematic viscosity, the low calorific value reaches 43 MJ / kg or above, the physicochemical property of the biofuel is similar to that of RP-3 aviation kerosene, and the biofuel has good substitutability and wide popularization value.

A method for producing bio-oil from lignin, comprising the following steps: (a) extracting lignin into oligomers for 30 to 90 minutes, preferably 40 to 70 minutes, in the presence of at least one alcohol having 1 to 5 carbon atoms, preferably 1 to 2 carbon atoms, at the boiling point temperature of said alcohol, or, in the case of a mixture of alcohols, at the temperature of a higher boiling point alcohol, thereby obtaining a liquid phase comprising oligomers and at least one alcohol, and a solid phase comprising lignin substantially free of said oligomers; (b) operating under supercritical conditions in the presence of at least one alcohol having 1 to 5 carbon atoms, preferably 1 to 2 carbon atoms, at a temperature of 200°C to 300°C, preferably 220°C to 295°C, and at 40 bar to 170 bar, preferably 50 bar to 150 bar. Under bar pressure, the solid phase containing lignin substantially free of said oligomers obtained in step (a) is depolymerized for 5 to 150 minutes, preferably 10 to 130 minutes, to obtain: - (i) a gas phase; - (ii) a mixture comprising: an oil phase consisting of bio-oil, a liquid phase containing at least one alcohol, and a solid phase containing carbon residues (“char”), the oil phase consisting of bio-oil, and optionally unconverted lignin; (c) the oil phase consisting of bio-oil is recovered from the mixture (ii) obtained in step (b). The bio-oil obtained by the foregoing method can be advantageously used, for example, as an antioxidant or UV stabilizer, particularly as an antioxidant or UV stabilizer in biofuels, which can be used as is or blended with other fuels in automotive or aviation diesel engines. Furthermore, the bio-25 oil obtained by the foregoing method can be advantageously used as an antioxidant in, for example, vegetable oils and animal or plant fats, as bio-feedback materials to slow their rancidity during transport and storage.

The application discloses a method for preparing biofuel by low-temperature dechlorination of waste PVC and coupling biomass co-pyrolysis, which comprises the following steps: drying, crushing and screening waste PVC, and then performing low-temperature dechlorination in an inert atmosphere, wherein the carrier gas is inert gas, the dechlorination temperature is 340-380 DEG C, the dechlorination time is 20-40 min, and dechlorinated PVC is obtained; crushing and drying the dechlorinated PVC, and then mixing the dechlorinated PVC with biomass at a mass ratio of 0.1-10:1, and then heating and pyrolyzing at 500-700 DEG C for 20-40 min to obtain biofuel. The method achieves good dechlorination effect through step-by-step pyrolysis, and improves the quality of biofuel; the method has a simple process flow, does not need to add any catalyst and adsorbent, and has a good industrial application prospect.

The invention provides recombinant algal mutants that have a genetic modification to a gene or nucleic acid sequence encoding a WD40 repeat containing protein or domain. The genetic modification of one or more nucleic acid sequences encoding a WD40 repeat containing protein or domain results in a mutant organism with increased lipid productivity and / or higher biomass productivity (as measured by total organic carbon). The genetic modification can be a gene attenuation or functional deletion. The lipid products of these mutants can be utilized as biofuels or for other specialty chemical products. Methods of making and using the recombinant algal mutants and methods of producing lipids are also disclosed.

The utility model relates to the technical field of cement plant kilns, and provides a biomass fuel auxiliary scattering and discharging device which comprises a hopper and a frame, a driving piece is arranged on the outer surface of the hopper, and the inner wall of the hopper is rotationally connected with a first scattering roller, a second scattering roller and a third scattering roller. Linkage pieces are arranged among the first scattering roller, the second scattering roller and the third scattering roller, and scattering cutters are fixedly connected to the surfaces of the first scattering roller, the second scattering roller and the third scattering roller. After the biofuel enters the hopper, a motor drives a first scattering roller to rotate through a speed reducer, a first synchronous wheel drives a second synchronous wheel and a second scattering roller to rotate through a first synchronous belt, and the first synchronous wheel drives a third synchronous wheel and a third scattering roller to rotate through a second synchronous belt, so that a scattering cutter rotates; and in addition, a vibration motor is combined, so that when the hopper is vibrated, the biofuel is convenient to discharge.

The invention relates to a pulverizer for biomass fuel raw material processing, and belongs to biofuel functional equipment. According to the technical scheme, the device comprises a bottom sliding seat, a feeding box, a crushing box and a conveyor, wherein the feeding box, the crushing box and the conveyor are arranged on the sliding seat; paired feeding rollers are arranged in the feeding box, adjacent feeding rollers are connected through a steel mesh, the feeding box and the smashing box are sequentially arranged front and back, an opening of the smashing box is communicated with an outlet of the feeding box, a funnel outlet is formed in the lower portion of the smashing box, the lower end of the conveyor is arranged on the funnel outlet side, the other end of the conveyor inclines upwards, and the smashing box is provided with a smashing power mechanism. And the feeding box conveys the power mechanism. Waste wood and bamboo can be smashed before being processed into biological particles, so that the problem of non-forming caused by thick and large fibers is avoided, the particle forming degree is improved, and the maintenance cost of the granulator is reduced.

The present invention relates to the field of biofuel production, and discloses a method for producing biodiesel fractions from oil-based raw materials. The method includes: under the presence of hydrogen, subjecting the oil-based raw materials to a first hydrotreating and heat exchange treatment to obtain a hydrotreating effluent I; subjecting the hydrotreating effluent I to a second hydrotreating to obtain a hydrotreating effluent II; performing gas-liquid separation on the hydrotreating effluent II to obtain liquid hydrocarbons, water, and a gas stream; subjecting at least part of the liquid hydrocarbons to hydroisomerization reaction and then performing separation to obtain diesel fractions. The method provided by the present invention completes the reactions with fast reaction rates and large heat releases during the oil hydrogenation process in the reaction module, and at the same time, a plurality of heat exchange templates are added between the reaction modules. Without adopting a large amount of cold hydrogen and product circulation, the total temperature rise of the reaction system can still be controlled, resulting in low production energy consumption and qualified quality of the prepared biodiesel fractions.

System (1) for biofuel storage and having: a tank (2) configured to contain the biofuel; a thermal conditioning unit (3) configured to maintain the biofuel that is inside the tank (2) at a desired temperature; a delivery unit (6) configured to draw biofuel that is inside the tank (2) to supply the biofuel to a tank of an external user device; an atmosphere conditioning unit (4) configured to maintain inside the tank (2) a controlled atmosphere; and an additivation unit (5) configured to add at least one additive to the biofuel that is inside the tank (2).

The invention is applicable to the technical field of biofuel processing, and provides a biomass particle forming machine which comprises a box body, a feeding mechanism, a feeding mechanism, a feeding mechanism, a feeding mechanism and a discharging mechanism, and the side face of the box body is provided with a discharging port; the forming mechanism comprises a rotating shell rotationally installed in the box body, plugging end covers are fixedly installed at the two ends of the rotating shell, a motor used for driving the plugging end covers to rotate is further arranged on the box body, a plurality of sets of strip-shaped holes are formed in the side wall of the rotating shell, and a forming assembly is arranged in each set of strip-shaped holes; a pneumatic control assembly used for adjusting the working state of the forming assembly is further arranged in the rotating shell. The forming mechanism is arranged in the box body, the material guiding mechanism is arranged in the box body, and a trepanning assembly is further arranged in the material guiding mechanism, so that the problems that an existing forming machine is simple in structure, most produced biomass particles do not have combustion-supporting holes, oxygen is not sufficient during combustion, and the combustion effect is poor are solved.

This utility model relates to the field of biofuel pellet transfer and transportation technology, and discloses a biofuel pellet transfer and transportation structure, including a box body with a lid on the top. A rubber pad is fixedly connected inside the box body, and a connecting component is provided on the outer wall of the box body. An opening and closing component is provided inside the box body. The connecting component includes a connecting block and a groove formed inside the box body. The side wall of the connecting block is fixedly connected to the outer wall of the box body, and the connecting block and the groove are fitted together. A slot is formed inside the connecting block. In this utility model, by inserting the connecting blocks of the same side wall of the box body into the groove, the outer wall of the connecting block will compress the trapezoidal block, causing the trapezoidal block to drive the sliding plate to compress the spring. When the connecting block is fully inserted, the spring releases its elastic potential energy, causing the trapezoidal block to lock into the slot. This solves the problem of relative sliding, displacement, or even separation of multiple boxes during transportation, improving the integrity and stability of the transportation structure.