37results about How to "Reduce heating effect" patented technology

The invention discloses a heat-insulating ceramic fiber board and a preparation method thereof. The heat-insulating ceramic fiber board comprises the following raw materials in parts by mass: 96-114 parts of aluminum silicate fiber mixed cotton, 4-6 parts of zirconium oxide fiber, 9-12 parts of alkaline silica sol, 12-15 parts of a water-based resin dispersant, 8-10 parts of aluminum oxide fine powder and 5-8 parts of high-temperature ceramsite sand. Wherein the aluminum silicate fiber mixed cotton is a mixture composed of aluminum silicate fiber raw cotton, aluminum silicate fiber broken cotton and aluminum silicate short fibers. The heat insulation ceramic fiber board is high in strength, long in service life, low in heat conductivity coefficient and good in heat insulation performance.

The invention discloses a system for purifying trimethylsilane containing dichlorosilane impurities, which comprises a reactive distillation column and a purification distillation column, and also discloses a method for purifying trimethylsilane containing dichlorosilane impurities, which comprises the following steps of: feeding trimethylsilane gas containing dichlorosilane impurities into the reactive distillation column; trimethylsilane gas containing dichlorosilane impurities enters the reaction section to react, the dichlorosilane impurities react to generate silane gas and a material containing tetrachlorosilane impurities, the silane gas is discharged from an exhaust port in the top of the reactive distillation tower, and the material containing tetrachlorosilane impurities enters the purification distillation tower from a discharge port in the bottom of the reactive distillation tower; according to the method disclosed by the invention, dichlorosilane is taken as a raw material, the dichlorosilane is taken as a raw material, the dichlorosilane is rectified in a purification rectifying tower and is collected at a tower top collecting port to obtain the high-purity trimethylsilane, the dichlorosilane impurity in the trimethylsilane can be effectively removed through the method disclosed by the invention, the high-purity trimethylsilane with the purity of 99.99% or above is obtained, the yield is greater than 85%, the process is simple, and the cost is low.

The invention discloses an air gap streaming type ventilation cooling method for a long-iron-core low-speed wind power motor, and belongs to the technical field of wind driven generators, and the method comprises the following steps: S1, arranging a stator frame with a ventilation cavity at the inner diameter side of an iron core of a stator, and arranging an air gap between the stator and a rotor; s2, cooling air is introduced into a cold air cavity of a cold air area of the stator base through a cooling fan; and S3, cooling air enters the air gap through the cold air cavity and the stator iron core ventilating duct in sequence, and then enters the hot air cavity of the hot air area of the stator base through the stator iron core ventilating duct so as to cool the iron core of the stator and the stator coil embedded in the stator iron core groove. According to the invention, through an air gap flow-around ventilation cooling mode, the uniformity of circumferential cooling air volume can be greatly improved, and meanwhile, the distribution of the air speed passing through the stator core ventilation duct in the axial direction is more uniform than that of a traditional structure, so that the motor cooling effect is greatly improved.

The present application relates to a short process forging method of Ti1100 alloy bar, which is used to solve at least one of the problems of long time, low production efficiency, poor mechanical properties, poor process stability, poor consistency of different batches, high cost and the like in the prior art forging method. The forging method controls the heating times of blooming forging and trans-phase zone forging, and cooperates with gradient air cooling treatment. Specifically, in the organization control, the conventional multi-heating-time beta phase zone upsetting and drawing forging is abandoned, the single-heating-time beta phase zone precise temperature control and dynamic deformation regulation are adopted, the excessive growth of beta grains is avoided, and the needle-like alpha phase lamellar aggregation or equiaxed alpha phase abnormal precipitation is prevented by combining with gradient air cooling, so as to ensure the uniformity of the organization, solve the problems of mechanical property fluctuation exceeding the index and low service reliability.

The invention discloses a transfer device for preventing displacement during stainless steel pipeline processing, comprising a limit roller, a limit plate, a fixed plate and a welding table, wherein the limit plate is symmetrically mounted on the limit roller and movably arranged. When the pipeline transfers slowly, the water flow rate of the water pipe is increased by sliding and shrinking the closing plate inward, and the pipeline temperature is reduced by heat exchange between the water pipe and the heat guide sleeve to prevent the pipeline from being deformed at high temperature. When the pipeline transfers quickly or at a normal rate, similarly, the water flow rate is reduced to prevent the heating effect on the pipeline from being reduced. When the transfer is slow, the heated cleaning liquid is diverted to the water collecting tank in the fixed table, so that the cleaning nozzle sprays the cleaning liquid to clean the steel parts at high temperature. When the transfer is fast or at a normal rate, water vapor is sprayed from the cleaning nozzle, thereby reducing the water spraying amount while maintaining the cleaning effect. The steel is heated and cleaned by the heated cleaning liquid, which is convenient for the steel to be deformed during the transfer process.

The utility model relates to the technical field of accelerator production, and provides a concrete accelerator reaction kettle with a heating and heat preservation double-layer structure, which comprises a heat preservation box, a bottom plate is fixedly connected to the bottom end of the inner wall of the heat preservation box, a kettle body is rotatably connected to the top end of the bottom plate, and a rack ring is fixedly connected to the upper end of the outer side of the kettle body. Uniformly distributed stirring rods are fixedly connected to the inner wall of the kettle body, a top plate is rotatably connected to the top end of the kettle body, and a mounting frame is fixedly connected to the top end of the top plate. According to the reaction kettle, through the matching of the bottom plate, the top plate, the mounting frame, the motor, the driving wheel, the belt, the driven wheel, the transmission rod, the gear, the rack ring and the stirring rod, the autorotation stirring effect on the kettle body is achieved, so that the flowability of raw materials is improved, the eddy current effect in the reaction process is enhanced, and the flowing of the raw materials in all directions is promoted; local dead angles in the kettle body are avoided, and the raw materials are fully mixed in the stirring process, so that the reaction efficiency and the product quality are improved.

A multi-directional extrusion forming method for Ω-shaped ribbed plate components belongs to the field of forging. The method solves the problems of difficulty in plastic forming and high production cost of existing aluminum alloy Ω-shaped ribbed plate components. The method includes: 1. forging design; 2. die design; 3. semi-free die forging blank; 4. multi-directional extrusion forming. The method is used for multi-directional extrusion forming of Ω-shaped ribbed plate components.

This invention relates to the field of lighting technology and discloses a suspended lighting fixture and its usage method. The fixture includes: a top cover, a base, a mounting bracket, a lamp bracket, a receiving slot, a control circuit board, a conductive component, a cavity, and a lighting body. The base has a top cover, and both the base and the top cover have a cavity. The control circuit board is placed within the cavity, and a conductive component is mounted on the control circuit board. The base has a mounting bracket and a receiving slot, and the lighting body has a lamp bracket. The receiving slot accommodates and places the lighting body, and the mounting bracket and the lamp bracket are interconnected. The conductive component is electrically connected to the power terminal of the lighting body. This lighting fixture design achieves multi-functionality, intelligent control, good stability, and easy installation on load-bearing objects. The design and use of microLED beads can reduce energy consumption and heat generation. Furthermore, research on plant distance can determine the optimal distance or lighting intensity for plants.

The utility model discloses an energy -saving zero gas consumption combined type low dew point drying -machine belongs to drying -machine technical field. An energy -saving zero gas consumption combined type low dew point drying -machine, including evaporimeter, heat exchanger, adsorption tower A and adsorption tower B, the inside of adsorption tower A and adsorption tower B all is provided with pressure measuring point and spot pressure gauge, and the bottom of adsorption tower A and adsorption tower B is provided with pipeline blow -off A and pipeline blow -off B respectively. To solve the existing combined equipment now can not complete satisfy the existing market to the energy consumption and performance requirement, such as no heat / micro -heat adsorption type drying -machine gas consumption is too big, the problem of excessive energy consumption, adopt variable frequency refrigeration compressor, this compressor can adjust compressor frequency according to load, thereby adjusting compressor energy consumption, can reduce energy consumption under low load working condition, and the variable frequency cold dryer and zero gas consumption air blower are combined, and the performance is better while energy consumption is reduced.

The invention belongs to the field of optical fiber corollary equipment, and discloses a Y-type three-phase arc high-voltage discharge system for an optical fiber fusion splicer, a ZYNQ development board generates two signals which are respectively used as driving signals of switching tubes of a Boost circuit module and a Flyback circuit module, the ZYNQ development board boosts an input direct-current voltage through the Boost circuit module, and outputs the boosted direct-current voltage to the Flyback circuit module; the system comprises three groups of Flyback circuit modules, the three groups of Flyback circuit modules are boosted and then serve as input voltages of the three groups of Flyback circuit modules, three groups of three-phase direct-current high voltages with the same voltage amplitude and the phase difference of 120 degrees in pairs are obtained, the three groups of Flyback circuit modules are connected with a three-phase discharging device, the three-phase direct-current high voltages break down air to form three-phase Y-shaped electric arcs, and optical fibers are welded through radiant heat zones generated by the electric arcs. The heat production power is high, so that welding of large-diameter optical fibers is facilitated; the temperature in the thermal radiation field is radially and symmetrically distributed, the center of the temperature zone is uniformly heated, and the heating effect is good.

The utility model relates to clothes care device, specifically provide a jet component and clothes care device, aim at solving the air flow dispersion of existing clothes care equipment, cannot carry out the pertinence double -sided nursing to clothes, thereby influence the problem of nursing effect. For this purpose, the jet component of the utility model includes the connecting pipe and at least two interval settings pipe group, the pipe group fixed connection in connecting pipe, be provided with exhaust on the pipe group, and the exhaust of adjacent two pipe group is used for carrying out the nursing to the clothes between adjacent two pipe group. The jet component of the utility model is through interval setting at least two pipe group on the connecting pipe, and the part exhaust is arranged towards adjacent pipe group, makes the air flow can concentrate and mutually facing injection, forms more uniform and covers the air flow action area of double -sided, thereby realizes the double -sided synchronous nursing to clothes, effectively avoided the defect that the air flow dispersion, nursing uneven in the prior art, improved the nursing efficiency and overall effect.

This application discloses a reflective device and semiconductor process equipment, relating to the field of semiconductor equipment technology. The reflective device includes an outer cylinder and an inner cylinder disposed within the outer cylinder. A reflective layer is disposed on the inner wall of the outer cylinder, and a transmission groove is disposed on the outer wall of the inner cylinder. A wafer is disposed inside the inner cylinder. Light emitted from a light source enters the outer cylinder, is reflected by the reflective layer, and transmitted through the transmission groove before entering the inner cylinder to heat the wafer. This reflective device ensures that light can enter the inner cylinder to heat the wafer by providing a transmission groove on the inner cylinder, while using protrusions on the outer cylinder to block some light, preventing excessive light from entering the inner cylinder and causing localized overheating, thereby reducing cylinder deformation and improving device stability.

The method comprises the following steps: adding the activated curing agent into wastewater, controlling the temperature of the wastewater to be 45-60 DEG C, controlling the pH value of the wastewater to be 9-11, and then filtering to remove a solid phase so as to obtain a pretreatment solution; rectifying and separating the pretreatment liquid to obtain an ammonia water product and crude phenol water; adjusting the pH value of the crude phenol water to 4.5-6.5 by using inorganic acid, then removing insoluble substances separated out from the crude phenol water, and rectifying to remove hydrogen sulfide in the crude phenol water to obtain purified phenol water; extracting and purifying the phenol water by using an organic extracting agent to obtain purified water and a loaded organic phase; and recovering phenol from the loaded organic phase to obtain a phenol product, and returning the obtained regenerated extractant to purified phenol water for recycling. According to the scheme, the problems of coking and blocking in the conventional phenol-ammonia wastewater treatment process can be effectively solved, the energy consumption and medicament consumption in the deamination process are reduced, the formation of a third phase in the phenol extraction process is reduced, the purity of an ammonia water product and a phenol product is improved, and the pollutant removal rate of purified wastewater is improved.

This invention relates to the purification of waste gas from rubber production, specifically providing a waste gas purification device for rubber production, aiming to solve the problem that existing waste gas purification devices for rubber production are unable to adjust the gas path according to changes in waste gas temperature. To this end, the waste gas purification device for rubber production of this invention includes an inlet pipe, a washing component, a drying component, a moisture absorption component, an adsorption component, and a heat exchange component. The inlet pipe is connected to a waste gas source, and the inlet pipe, washing component, drying component, and moisture absorption component are all connected to the heat exchange component, so that the inlet pipe, washing component, drying component, and moisture absorption component are connected sequentially. This invention, by setting up a heat exchange component, allows the high-temperature waste gas discharged from the inlet pipe and the waste gas discharged from the drying component to exchange heat with the low-temperature waste gas discharged from the washing component, thereby preheating the waste gas entering the drying component. This increases the waste gas temperature without increasing additional heating energy consumption, reducing the heating load and energy consumption of the drying component.

The invention provides a vertical flooded evaporator, and relates to the field of evaporators. The vertical flooded evaporator comprises a base, a supporting seat is fixedly connected to the rear end of the upper surface of the base, a fixing frame is hinged to the upper surface of the supporting seat, a tank body mechanism is fixedly connected to the outer wall of the front end of the fixing frame, and the tank body mechanism comprises a shell; first flange plates are fixedly connected to the lower end and the upper end of the outer wall of the shell, and a plurality of limiting clamping grooves are formed in the lower end of the inner wall of the shell. According to the evaporator, the evaporator is provided with the first heat insulation inner shell and the second heat insulation inner shell, a user can separate the heat insulation outer shells by detaching threads on fixing clamping blocks, and then the user can remove scales and dirt adhering to the outer wall of a positioning partition plate and the outer wall of a cold water conveying pipe; therefore, heating parts in the evaporator always have a good heating effect, and the heating efficiency and the use time of the evaporator are further improved.

The invention discloses a process for synthesizing methane chloride from PVA (polyvinyl alcohol) byproduct methyl acetate. The process comprises a catalytic reactor, a first rectifying tower, a second rectifying tower and the like. A PVA byproduct methyl acetate is used as a raw material, a methyl acetate hydrolysis endothermic reaction and an exothermic reaction for synthesizing methane chloride from methanol and hydrogen chloride gas are simultaneously completed in a reactor, a hydrolysis reaction product methanol and a synthesis reaction product water are mutually reaction raw materials, the consumption of the reaction products promotes chemical equilibrium to be carried out in a positive direction, and the reaction degree is more thorough. The problem that azeotrope formed by methyl acetate hydrogenation and methanol is difficult to separate can be avoided. The method not only has the characteristics of novelty, simple process, easiness in separation of reaction products, energy conservation, consumption reduction and the like, but also provides a new method and way for deep development and application of the PVA byproduct methyl acetate.

This invention relates to the field of forging technology, and more specifically, to a method for local heating of a ring forging. The method includes steps S11: obtaining the position of a second segment of the ring forging; step S12: based on the obtained position of the second segment being located at the middle of the length direction of the ring forging, obtaining the positions of a first segment and a third segment; step S13: based on the obtained position of the first segment, fitting a first heat-insulating component onto the first segment; step S14: based on the obtained position of the third segment, fitting a second heat-insulating component onto the third segment; and step S15: placing the ring forging with the first and second heat-insulating components in a heating furnace for heating. This solves the problem of how to accurately perform local heating of a ring forging.

The application discloses a method for preparing a two-dimensional ultracold atomic gas by optimizing adiabatic compression, and belongs to the technical field of ultracold atomic physics and optical lattice. The method takes the quantum adiabatic evolution of a three-dimensional ultracold atomic gas in an adjustable period optical lattice as a physical model basis, and equivalently describes the motion of atoms in the lattice bound direction as a one-dimensional quantum harmonic oscillator system varying with an external parameter. In the lattice compression process, the instantaneous energy level structure of the system evolves with time, and the minimum energy gap region between the lowest energy level and the first excited state is the main source of non-adiabatic transition. A non-adiabatic parameter is introduced to simultaneously describe the relationship between the instantaneous energy gap and the scanning rate of the parameter, which is used for quantitative evaluation of the adiabaticity of the system, and the Landau-Zener non-adiabatic transition model is combined to design and optimize the scanning curve of the lattice compression. The scheme can effectively reduce the probability of non-adiabatic excitation in the compression process, and significantly shorten the lattice compression time under the premise of ensuring the adiabatic evolution of the system.

This application provides a cooking control method, apparatus, and cooking equipment, relating to the field of cooking control. The method includes: acquiring a recipe to be cooked using the cooking equipment; if the portion size of the dish to be cooked is obtained from the recipe, adjusting the cooking state of the pot body of the cooking equipment according to the portion size.

The utility model discloses a workpiece coating and baking device which comprises a support, a supporting table, a moving table, a spraying pipe and an electric heating plate. A driving motor is arranged at the bottom of the supporting table and drives the moving table to rotate through a rotating shaft; second air cylinders are symmetrically installed at the bottom of the moving table, a driving pressing plate and a suction cup can be fixed to the inner side of a to-be-machined workpiece after moving, limiting of the to-be-machined workpiece is achieved, the moving table and the to-be-machined workpiece can rotate under driving of a driving motor, and spraying and baking are conveniently achieved. An electric heating plate is pushed by a first air cylinder to move towards the center, the position relation between a heat source and a workpiece is conveniently adjusted, and stable movement is achieved through matched adjustment of a limiting rod and a rod sleeve; and a material collecting pipe is arranged at the bottom of the inclined surface of the moving table to recover the coating, waste can be reduced when the discharging nozzle releases redundant coating, and cost is reduced. Through combination of rotary spraying and movable heating, the coating uniformity and the baking efficiency are improved, meanwhile, the structure is simplified, and the maintenance cost is reduced.

The invention belongs to the technical field of food engineering automation control, and discloses an orange juice filling process cooperative control method based on viscosity and oxygen content feedback. The method comprises the following steps: acquiring orange juice viscosity, dissolved oxygen concentration and temperature data in real time through multiple detection sites, constructing a three-parameter coupled dynamic state space model, identifying nonlinear lag response characteristics between viscosity change and dissolved oxygen change, calculating a cross sensitivity matrix, determining a conflict region and generating a Pareto feasible region. On the basis, a sectional temperature-flow rate cooperative control track is designed for different filling stages, and an oxygen isolation layer is formed through microbubble injection. And monitoring a liquid level oscillation spectrum to identify a secondary dissolved oxygen absorption characteristic peak, and correcting cooling section parameters of a control track in real time. Dynamic balance of viscosity fluidity and oxidation inhibition is realized, product quality stability and shelf life are improved, and production efficiency is improved.

The invention relates to the technical field of casting machines, in particular to a casting machine head heating device which comprises a heat preservation shell, the heat preservation shell is used for wrapping the periphery of a casting machine head, a plurality of heating rods are arranged in the heat preservation shell and used for heating the casting machine head, and a supporting assembly is arranged in the heat preservation shell and used for supporting the casting machine head. The supporting assembly is used for supporting the multiple heating rods, so that the heat preservation shell can be evenly distributed when installed on the periphery of the machine head of the casting machine, heating dead corners and temperature differences caused by asynchronous installation of a traditional device are reduced, it is ensured that the overall temperature of the machine head is balanced, the problems that due to local cooling, fluidity of materials becomes poor, and solidification and blockage occur are solved, and the casting quality is improved.

The application discloses a kind of computer shell efficient production process.The method includes the following steps: S1, modularization preparation: according to production instruction, corresponding type of metal plate or plastic granules is automatically selected and transported to pretreatment station;S2, intensive forming: the raw material after pretreatment is sent into composite machining center, by being integrated in the same station punching forming and laser cutting module, or injection molding and in-mold cutting gate module, once the structure forming of shell blank and excess material separation is completed;S3, closed-loop post-processing: shell blank is transferred to intelligent post-processing unit;S4, coating rapid curing;S5, online intelligent detection and stacking.The application significantly improves production efficiency and shortens cycle, improves product precision and yield, greatly reduces energy consumption and floor area, improves production flexibility and intelligent level, improves environmental friendliness, reduces VOCs emission.

The utility model provides a production device of a substituted pyrazole acid compound. The production device comprises an oxidation reaction unit, a hydrolysis reaction unit, a first solid-liquid separator, an alkaline hydrolysis reaction unit, an acidification reaction unit, a second solid-liquid separator, a pulping kettle, a third solid-liquid separator and a first drying machine. According to the production device provided by the utility model, substituted pyrazole acid compounds and potassium sulfate can be obtained through separation at the same time, the generation of waste acid, waste gas and waste salt in the production device is reduced, and the process is clean, green and environment-friendly. And an ethanol recovery tower is arranged in the reaction process, so that the comprehensive utilization of ethanol is realized, and the economical efficiency of the product is improved.

The utility model provides a kind of crystallization equipment for preventing material wall-hanging, the main body container of crystallization process is carried out in the crystallization tank storage crystal slurry liquid, the position of retainer is designed on the height of crystal slurry liquid, groove is spirally coiled along the outer wall of crystallization tank, form spiral structure, coil pipe is clamped into groove, fixedly coiled on the outer wall of crystallization tank along groove. Two ends of coil pipe extend outside retainer, respectively equipped with water inlet and water outlet. External connection pump body, form liquid circulation system, in liquid circulation system, pump body sends 80 degrees condensate into the water inlet of coil pipe, condensate flows in coil pipe, heat is transferred to the outer wall of crystallization tank by heat conduction, heated to 75 degrees, condensate circulation in coil pipe also heats crystal slurry liquid, effectively reduce excessive powder crystal in cooling crystallization process, reduce the viscosity of crystal slurry liquid, reduce wall-hanging phenomenon.

The utility model provides a kind of lithium battery thermal runaway automatic early warning fire extinguishing suppression device, belong to lithium battery field, including box, the bottom of the box is fixedly connected with support leg, the inside fixed connection of the box is placed with board, the top of the board is provided with lithium battery, the inner wall of the box is provided with control switch, the lithium battery is electrically connected with control switch, the top of the box is provided with alarm device;The alarm device includes heat sensor, the bottom of the heat sensor is placed in the top of board, the inner wall of the box is provided with control panel.The utility model is provided with alarm device, so that rack can drive push plate to move when moving, and then push plate can contact control switch when moving, so that push plate can close control switch when contacting control switch, and then lithium battery running can be closed, to reduce the additional heating or damage caused by current continuous flow.

The utility model provides a device for solving the problem of tungsten film growth on the back and the lower part of a tungsten heating device. And the working cavity is formed in the working box. The utility model provides a device for growing a tungsten film on the back and the lower part of a tungsten heating device, reaction gas is introduced through a gas pipeline and sprayed on the surface of a wafer through a spray head, the wafer is subjected to heat transfer by the heating device, a chemical reaction is carried out on the surface to generate the tungsten film, and a group of one-to-two purified gas pipelines for introducing argon are designed at the bottom of a working box. The heating device is used for upwards blowing reaction gas and gas left through flow balance, and the reaction gas and purging gas are pumped away through the purification pipeline vacuumizing pipe, so that the problem that a large number of tungsten films are generated on the back face and the bottom of the heating device is solved, the device is simple in structure and high in practicability, the tungsten film cleaning effect is improved, and the service life is prolonged. The heating effect of the heating device is prevented from being reduced, and the situation that wafers are poor in machining or break down is reduced.

A method for producing high-strength, high-toughness PC steel bars using ultra-fast induction heating. This method employs an ultra-fast induction heating process, increasing the wire speed to 110-120 m / min to rapidly heat the 30MnSi base material to the austenitic phase region, followed by short-term holding and water quenching. Then, it is further ultra-fast induction heated to the tempering temperature, held for a short time, and then water quenched again. The 30MnSi PC steel bars of this invention maintain high strength while also possessing excellent toughness and plasticity, with a tensile strength of 1450-1480 MPa, a yield strength of 1270-1340 MPa, an elongation after fracture of 13%-15%, and a low-temperature (-20℃) impact energy of 48-52 J. Compared to conventional wire speed (70-85 m / min) production methods, the high-strength, high-toughness 30MnSi PC steel bars produced by this invention improve performance while increasing production efficiency by 30%-50%, significantly reducing costs.

The utility model relates to serpentine pipe protection technical field, concretely relates to a kind of anti-deformation support device for boiler serpentine pipe, including connecting boiler, connecting base and serpentine elbow, the outside fixed connection of connecting boiler has connecting valve, the outside fixed connection of connecting boiler has air pressure tank, the outside fixed connection of connecting boiler has vibrating stand, push button is prompted by expansion of liquid, start connecting valve, liquid in serpentine elbow is injected into folding box to carry out pressure relief, prevent the expansion of liquid and deform serpentine elbow, after pressure relief is completed, by starting push hydraulic rod, liquid in folding box is injected into serpentine elbow, in the heating process to serpentine elbow, by starting vibrating motor, vibrating motor drives vibration shaft rotation, vibration shaft drives vibration rod left and right movement, vibration rod drives movable block hammer to hammer block, dust in connecting boiler is hammered down, reduce the influence of dust on heating.

The present application belongs to the technical field of biomass gasification, and particularly relates to a method and system for preparing SAF synthetic gas based on a bubbling fluidized bed. The system comprises, in sequence, a bubbling fluidized bed gasifier, a cyclone separator, a hot catalytic filtration-reforming integrated device, a reconfigurable dry deep purification unit, and a water gas shift and CO2 removal and recycling unit. At least two layers of gasification agent nozzles are arranged on the axial sides of the freeboard area of the gasifier. The reconfigurable dry deep purification unit is provided with a plurality of switchable adsorption beds, and is configured with an online analysis and program control system based on synthetic gas impurity fingerprints. The water gas shift and CO2 removal and recycling unit is provided with a CO2 return pipe for conveying part of the removed CO2 to the freeboard area. The present application can long-term and stably output synthetic gas meeting the requirements of a SAF synthetic catalyst by means of a systematic strategy of tar source inhibition, purification bed sequence reconfiguration according to impurity spectrum, and ratio adjustment and heat management linkage.