30results about How to "Economical and reasonable" patented technology

The invention provides a filling-reclaiming method for building land in coal mining subsidence areas, which belongs to the technical field of mining and is used to solve the problem of developing and utilizing coal gangue. The invention adopts a technical scheme that the method is implemented according to the following steps: a, draining accumulated water in reclamation areas and clearing silt; b, striping and stockpiling surface soil; c, determining the thickness and density of coal gangue for hierarchical backfilling through a vibration pressure test; and d, performing hierarchical backfilling compaction on the coal gangue and soil. The method has the following main advantages that: 1, the ways of utilizing the coal gangue are expanded, and environmental pollution caused by stockpiling the coal gangue on ground is reduced; 2, the situation that building land is increasingly short is alleviated by reclaiming subsidence land to be the building land; and 3, the treatment for coal gangue for large-area hierarchical backfilling by a hierarchical vibration-compaction method is economical, reasonable and ideal in compaction effect, can improve the compactness and bearing capacity of coal gangue layers, and can prevent the spontaneous combustion or efflorescence of coal gangue foundations and the separation of harmful substances from polluting local environment because hierarchical compaction greatly reduces porosity and isolates air.

The invention discloses a high-strength and high-ductility heat treated steel bar capable of minimizing the amounts of other metal components. The heat treated steel bar comprises the following components: 0.20-0.25% of C, 0.56-0.75% of Si, 1.10-1.65% of Mn, 0.01-0.05% of V, 0.10-0.20% of Cr, 0.01-0.02% of Nb, no more than 0.040% of P, no more than 0.040% of S, and the balance of Fe. The invention also discloses a method suitable for preparation of the high-strength and high-ductility heat treated steel bar. The method is as below: a billet is first treated with hot rolling into a straight bar or a steel wire rod by two technologies, and the hot rolling process is designed to ensure the raw materials needed in the heat treatment process to gain good tissue and original performance; and the steel bar is treated with the heat treatment process to further improve performance of the steel bar. Cost of the invention is economical and reasonable; and a product has yield strength higher than 650MPa, and good ductility and corrosion resistance.

The invention relates to a hot rolled steel plate for double-faced enamel and a production method of the hot rolled steel plate and belongs to the technical field of iron-base alloy. The production method of the hot rolled steel plate comprises the steps of: controlling the ingredients and mass percents of the hot rolled steel plate as follows: 0.02-0.1% of C, not larger than 0.1% of Si, 0.2-1.0% of Mn, not larger than 0.02% of P, 0.005-0.035% of S, 0.01-0.1% of Als, 0.002-0.01% of N, 0.01-0.1% of Ti, 0.01-0.05% of Sb, and the balance of ferrum and inevitable impurities; and simultaneously controlling the heating temperature of the continuous casting slab of the hot rolled steel plate to be 1150-1230 DEG C, controlling the temperature of a precise rolling inlet to be 1020+ / -20 DEG C, controlling the precise rolling ending temperature to be 840-920 DEG C, and controlling the coiling temperature after the precise rolling operation to be 550-650 DEG C. The hot rolled steel plate and the production method of the hot rolled steel plate fully utilize the inevitable products C, S and N elements of steelmaking production to replace the function of the Ti element to reduce the dosage of the Ti element; and a proper dosage of Sb element is added to prevent the scales detonation of the enamel and reduce the steelmaking cost, and the hot rolled steel plate with good double-faced enamel processing performance and small strength performance change after enamel is obtained.

The invention discloses a kitchen waste recycling aerobic treatment system device, and particularly relates to the field of kitchen waste recycling. The kitchen waste recycling aerobic treatment system device comprises a waste treatment site and a treatment system device, the treatment system device is provided with a kitchen waste transport vehicle and a storage bin, and one side of the storage bin is provided with a manual sorting platform; and a first spiral conveyor is arranged between the storage bin and the manual sorting platform. Through transmission of a spiral reducing dehydration extruder, kitchen waste is subjected to crushing, spirally-reduced extrusion and dehydration, discharged oily water enters a full-automatic oil separator to be subjected to oil-water separation, solid residues are conveyed to a biochemical treatment machine through a second spiral conveying device to be subjected to high-temperature aerobic fermentation treatment, and before treatment, the salinity,grease and pH value of the kitchen waste do not need to be adjusted. The harmless requirement of kitchen waste treatment can be met, a treated degradation product can be directly changed into nutrient soil or deeply processed into organic fertilizer, and waste oil can be separated from the discharged wastewater or reprocessed into biodiesel.

The invention discloses a constant-temperature gas water heater which comprises a gas water heater body, a circulating pipeline connected to the gas water heater body and a circulating device mounted on the circulating pipeline. The constant-temperature gas water heater is characterized in that the circulating device comprises a forward circulating module and a backward circulating module, and fluid in the circulating pipeline is circulated forwards under the action of the forward circulating module or circulated backwards under the action of the backward circulating module. The forward circulating module and the backward circulating module are arranged on the circulating device, the circulating water flow direction in the circulating pipeline of the gas water heater can be controlled, and therefore the constant-temperature gas water heater is precisely controlled to be turned on and off; and the gas water heater runs economically and reasonably in the preheating process, it is ensured that the temperature of all sections of the circulating pipeline is even after preheating is completed, and the functional defects of overheating, supercooling, sudden temperature changes and the like of a traditional circulating device are overcome. The invention further discloses a constant-temperature control method.

A production technique for copper ammonia fiber looped fabrics is characterized in that blended yarns blended by copper ammonia fibers and cotton fibers and / or 100% of copper ammonia yarns are used as weaving yarns, and are woven to obtain grey fabrics, wherein the weaving yarns are refined before the weaving, or the grey fabrics are refined after the weaving; and then the grey fabrics are softened to prepare the copper ammonia fiber looped fabrics. The technique is simple, reliable and convenient to implement; and prepared copper ammonia looped products have the characteristics of freshness, amenity, health, comfort, humidity absorption, breathability, natural color, soft texture, good skin friendliness and the like.

The invention provides a telescopic decanter for a continuous loop-type reaction tank, which comprises a telescopic tube (12) arranged at the bottom of the reaction tank (1) and formed by a plurality of tubes (12a, 12b, 12c) in a vertical direction. The upper part of the telescopic tube (12) is equipped with a buoy composition (11). The upper part of the buoy composition (11) or the telescopic tube (12) is equipped with an inflow passage for processing water. The treatment water discharge pipe (3) is connected with the lower part of the telescopic tube (12). Sludge components and treated water are prevented from being discharged by utilizing the telescopic decanter. Therefore, the cleaning and replacement period of filtration components can be prolonged as much as possible in the subsequent filtering stage.

The invention relates to a crank arm type aerial work vehicle hydraulic system. A rod cavity of a lower amplitude-variable oil cylinder of the crank arm type aerial work vehicle hydraulic system communicates with a rodless cavity of a medium amplitude-variable oil cylinder through a first two-way balance valve and a second two-way balance valve, and a communication oil path of the first two-way balance valve and the second two-way balance valve communicates with an oil inlet of an auxiliary synchronization valve; a first oil control port of the first two-way balance valve communicates with a rod cavity of the medium amplitude-variable oil cylinder through the second two-way balance valve, and a communication oil path of the first oil control port and the second two-way balance valve communicates with an oil outlet of the auxiliary synchronization valve; a second oil control port of the second two-way balance valve communicates with a rodless cavity of a lower amplitude-variable oil cylinder through the first two-way balance valve; and the auxiliary synchronization valve includes an overflow valve and a throttle valve which are connected in parallel. According to the crank arm typeaerial work vehicle hydraulic system, the auxiliary synchronization valve enables the lower amplitude-variable oil cylinder and the medium amplitude-variable oil cylinder to move at the same time, sothat the crank arm type aerial work vehicle hydraulic system is compact in layout and easy to maintain.

The invention relates to a wire drawing oil, and in particular relates to a high temperature resistant high speed wire drawing oil; the high temperature resistant high speed wire drawing oil comprises the following raw materials by weight: 2-3 parts of stearic acid, 10-12 parts of 2-octyldodecanol, 2-4 parts of trimethylolpropane, 60-80 parts of di-iso-octyl sebacate, 65-70 parts of hydrogenated polydecylene, 5-6 parts of hydrogenated castor oil, 5-8 parts of sulfurized cottonseed oil, 1-2 parts of fatty acid methyl ester, 0.2-0.5 part of octyl isothiazolinone, 1-2 parts of butyl hydroxy anisd and 2-3 parts of an assistant; the high temperature resistant high speed wire drawing oil uses the di-iso-octyl sebacate and the hydrogenated polydecylene as base oil, by combination with the hydrogenated castor oil, sulfurized cottonseed oil, the trimethylolpropane and other additives, extreme pressure antiwear performance of the wire drawing oil can be greatly improved, the octyl isothiazolinone is a green bactericidal anti-corrosion compound, and makes the wire drawing oil more resistant to storage, the prepared wire drawing oil is particularly prominent in thermal stability, and is especially suitable for high speed wire drawing and drawing process needs.

The invention discloses a channeling design method for reservoir capacity recovery in front of a high floodland and deep-cut channel reservoir dam, and belongs to the technical field of water conservancy project desilting. Due to the fact that a natural main channel and a floodland exist on the upstream of the dam, the high position of the floodland at the drought period is exposed above the riversurface, and channeling construction operations can be executed with small-sized equipment; then water is led into the channel before the floor season of the river, and floodland silt outside the channel is made to collapse; and finally the reservoir water level is lowered to discharge the silt, and thus the reservoir capacity in front of the dam can be recovered. By adoption of the method, the wet soil boundary in the critical state is subjected to stability against sliding checking calculation, the designed channeling depth is determined, and the optimal excavation gradient inside the channel is calculated through the starting speed of the silt. By means of the method disclosed by the invention, the design and construction scheme is simple, no large-sized hoisting equipment and carryingequipment are required, and the cost is low and reasonable; and moreover, the water level fluctuation law is ingeniously utilized, natural scouring and collapsing happen to soil bodies, time and labor are saved, the sand-contained water flow concentration inside the dug channel is high during desilting, the desilting effect is good and the channeling design method is suitable for small-sized heavily silt-carrying river tributaries and large-and-medium-sized heavily silt-carrying river main streams.

The invention provides high-strength and low-temperature-resistant forklift door frame structural steel and a preparing method thereof. The forklift door frame structural steel comprises following components including, by weight percent, 0.15%-0.20% of C, 0.35%-0.50% of Si, 1.40%-1.60% of Mn, smaller than or equal to 0.020% of P, smaller than or equal to 0.010% of S, 0.07%-0.09% of V, 0.025%-0.04%of Nb, 0.30%-0.45% of Cr, 0.011%-0.016% of N, smaller than or equal to 0.003% of O, and the balance iron and inevitable impurities. The preparing method of the high-strength and low-temperature-resistant forklift door frame structural steel comprises converter smelting, LF refining, continuous casting, steel blank heating, rolling and cooling after rolling. According to the forklift door frame structural steel prepared through the preparing method is economical and reasonable in cost, on the premise that the high yield strength (larger than or equal to 500 MPa) of materials is guaranteed, thelow-temperature impact toughness is obviously improved, and the impact toughness reaches 70 J or above under the condition of -20 DEG C. The design requirements of users for lightweight, large loadsand long service life can be met, and wide environment adaptability is achieved.

The invention relates to a glycosylated hemoglobin / blood sugar integrated detection bigeminy strip. The glycosylated hemoglobin / blood sugar integrated detection bigeminy strip comprises a sample area and a reaction area, and is characterized in that two indices share the single sample area; the reaction area comprises two different detection windows; the two indices, namely glycosylated hemoglobin and blood sugar, can be detected simultaneously; the sample area where the blood sugar is detected by a dry chemical method is located in the same position as the reaction area; the reaction area where the glycosylated hemoglobin is detected by a dry immunofluorescence technique is 0.5 cm away from the sample area. The different reaction areas contain different reagent pads to independently react with corresponding ingredients in blood respectively. The synchronous detection can be achieved only by quantitatively dropping a blood sample (whole blood) of a detected person into the sample area, and the strip is very applicable to medical institutions or individuals. The strip can simultaneously detect the two very important blood sugar monitoring indices, help a patient to find a problem at any moment and reflect the blood sugar control level of the patient within a time period, and is very important for preventing, treating and controlling complications of diabetes mellitus.

The invention provides an accurate control method for multi-valve multi-mode adjustment. The method comprises the steps of setting a target temperature TSV; collecting the water outlet temperature TAV; comparing the water outlet temperature TAV with the target temperature TSV to obtain a comparison result; forming an execution instruction according to the comparison result; and receiving the execution instruction by each valve and completing the action corresponding to the execution instruction. The method has the beneficial effects that a plurality of valve loops are independent of one another, the same-direction synchronous action, the same-direction asynchronous action, the different-direction synchronous action or the different-direction asynchronous action is comprehensively executed, multiple modes are achieved, the feedback quantity of the water outlet temperature is introduced, the hysteresis of a heating system can be treated, finally, the target value can be controlled very accurately and timely, a controlled system can be more stable, the system load fluctuation is small, and the system operation is more economical and reasonable.

Disclosed is an automatic switching device for intelligently controlling multiple transformers. The automatic switching device is applicable to power supply networks of large and medium factories, capacity of a controlled system is preset to be 10MW, and primary side voltage of the transformers is 10kV. A chip 80C51, developed and produced by Intel Company, in a single chip microcomputer in a MSC-51 series is selected for a control unit of the automatic switching device, and novel setting of hardware, a clock program and a keyboard program is adopted.

The invention provides a preparation method of nano TiO2 photocatalyst particles. The method comprises the following steps: (1) neutralizing precipitation process; (2) dispersion process; (3) oxidative transformation process; (4) curing process. The method not only solves the problem of easy aggregation of the nano TiO2 photocatalyst particles, enables the product particle sizes to be small, enables the average particle size to be less than 30nm and enables the product to be higher in concentration, but also has a good formaldehyde degradation function under the condition of visible light and overcomes the defect that the traditional photocatalyst works only under the condition of ultraviolet light, thus being wider in application scope. The preparation method does not need high-temperature calcination or water-bath heating, is low in requirements for equipment, simple in technological process and easy to operate and control; furthermore, the preparation method can use general industrial grade raw materials, thus being economical and reasonable in cost; therefore, the method has very high market competitiveness and is easy in realization of large-scale industrialization.

The invention discloses a mixed sewage short-range treatment system, which comprises a regulating pool, a reaction tank, a sludge tank and a clean water pool. A liquid inlet of the regulating pool isconnected with a to-be-treated sewage pipeline which includes filter press manufacturing electro-welding workshop sewage and complete machine water pressure testing workshop sewage, and a liquid outlet of the regulating pool is connected with a liquid inlet of the reaction tank. An agent inlet of the reaction tank is used for adding agents including waste acids, quick lime and nonionic polyacrylamide, a sludge outlet of the reaction tank is connected with the sludge tank, and a clean water outlet of the reaction tank is connected with the clean water pool. The invention further discloses a mixed sewage short-range treatment method. The system and the method have advantages that mixed sewage of a filter press manufacturing electro-welding workshop sewage and a complete machine water pressure testing workshop can be treated at the same time, only a few types of added agents including waste acids, calcium oxide and NPAM are required, low agent feeding quantity is realized, and treated clean water can be recycled; in addition, due to use of the waste acids, waste recycling is realized.

The invention provides a mechanical oil stain cleaning agent and a preparation method thereof. The cleaning agent comprises the following components in parts by weight: 13 to 16 parts of magnesium sulfate, 10 to 13 parts of calcium hydroxide, 5 to 8 parts of sodium metasilicate pentahydrate, 1 to 4 parts of thiocyanate, 25 to 28 parts of calcium carbonate, 20 to 23 parts of sodium nitrite, 22 to 25 parts of hydrogen-containing silicone oil, 11 to 14 parts of an antioxidant, 1 to 2 parts of graphite powder, 11 to 14 parts of normal propyl alcohol, 2 to 3 parts of melamine cyanurate acid, 1 to 4parts of montmorillonite, 1 to 2 parts of benzoyl peroxide, 5 to 8 parts of a lubricant, and 100 parts of deionized water. Compared with the prior art, the cleaning agent is simple in preparation method, economical and reasonable in cost, fragrant in taste, poisonless and harmless, rapid in decontamination and excellent in cleaning effect.

The invention discloses a composite pellet soil additive and a composite pellet soil production method. The composite pellet soil additive comprises a formula A and a formula B. The formula A is prepared from 1 part of lauryl sodium sulfate, 1 part of sodium polyacrylate, 1 part of polyacrylamide and 3 parts of high-viscosity CMC. The formula B is prepared from 1 part of the lauryl sodium sulfate, 1 part of the sodium polyacrylate, 1 part of the polyacrylamide and 3 parts of polyvinyl alcohol. According to the composite pellet soil additive and the composite pellet soil production method, a prepared product is based on the principles of good biodegradability and low toxicity, the lauryl sodium sulfate is used as an emulsifier of medicines and cosmetics, a foaming agent of toothpaste, a fire extinguisher and a raw material of a detergent, and irritates respiratory tracts to cause respiratory tract allergy, and when the product is used, a user wears a dustproof mask, and the other components are non-toxic.

The invention relates to a reasonable matching method of a walking beam type pumping unit and electromotors. The method comprises the steps that firstly, a pumping unit database is built; secondly, an electromotor database is built; thirdly, a rod tube database is built; fourthly, four-bar linkage movement calculation is conducted on the pumping unit; fifthly, polished rod loads of a rod pumped well are calculated; sixthly, the torque of a reduction gearbox is calculated; seventhly, input end parameters of the driving electromotor are calculated; eighthly, the seventh step is repeated, and calculation is conducted on input end parameters of each one of a three-phase asynchronous electromotor, a double-power electromotor, a high slip electromotor and a permanent-magnet synchronous electromotor; ninthly, reasonable matching is conducted on the matched rod pumped well and the electromotor, calculation results of the eighth step are compared with a standard configuration electromotor scheme, and after screening based on constraint conditions is conducted, the scheme having the highest comprehensive electricity-saving ratio is the optimized electromechanical reasonable matching scheme. The method is beneficial to improving the power utilizing rate and efficiency of a driver electromotor, improving the current situation of 'big Mara trolleys', and achieving energy saving and emission reduction.

The invention discloses full-automatic rotor commutator copper scrap removing equipment which comprises an equipment body. The equipment body comprises a shielding case, and a rotor chuck workpiece, a copper scrap cleaning brush, a Y-axis adjustable-speed motor, a brush connecting shaft and an X-axis adjustable-speed motor are arranged in the shielding case. The copper scrap cleaning brush is connected with the X-axis adjustable-speed motor through a brush connecting shaft. A control part is arranged on the right side of the equipment body and comprises a Y-axis motor speed regulator and an X-axis motor speed regulator. A resettable counter, a timer work indicating lamp and an adjustable timer are arranged below the X-axis motor speed regulator. A switch assembly is arranged at the bottom of the equipment body. By the adoption of the structure, copper scraps of a rotor commutator can be fully automatically removed. Due to the fact that a double-shaft speed-adjustable component is arranged in the structure, free switching is achieved according to the size of a product in the product brushing process, the application range of the product is wide, and the copper scrap removing precision is higher.

The invention discloses a constant-temperature gas water heater which comprises a gas water heater body, a circulating pipeline connected to the gas water heater body and a circulating device mounted on the circulating pipeline. The constant-temperature gas water heater is characterized in that the circulating device comprises a forward circulating module and a backward circulating module, and fluid in the circulating pipeline is circulated forwards under the action of the forward circulating module or circulated backwards under the action of the backward circulating module. The forward circulating module and the backward circulating module are arranged on the circulating device, the circulating water flow direction in the circulating pipeline of the gas water heater can be controlled, and therefore the constant-temperature gas water heater is precisely controlled to be turned on and off; and the gas water heater runs economically and reasonably in the preheating process, it is ensured that the temperature of all sections of the circulating pipeline is even after preheating is completed, and the functional defects of overheating, supercooling, sudden temperature changes and the like of a traditional circulating device are overcome. The invention further discloses a constant-temperature control method.

The invention relates to a hydraulic system of an articulating arm type aerial work vehicle. The rod chamber of the lower luffing cylinder of the hydraulic system of the crank arm type aerial work vehicle communicates with the middle luffing rodless chamber through the first two-way balance valve and the second two-way balance valve, wherein the first two-way balance valve and the second two-way balance The communication oil passage between the valves communicates with the oil inlet port of the auxiliary synchronous valve; the first oil control port of the first two-way balance valve communicates with the rod chamber of the middle luffing through the second two-way balance valve, wherein the first oil control port communicates with the The communication oil passage between the second two-way balance valves communicates with the oil outlet of the auxiliary synchronous valve; the second oil control port of the second two-way balance valve communicates with the rodless chamber of the lower amplitude through the first two-way balance valve; wherein, the auxiliary The synchronous valve consists of a relief valve and a throttle valve connected in parallel. The hydraulic system of the crank arm type aerial work vehicle provided by the present invention uses the auxiliary synchronous valve to make the lower luffing oil cylinder and the middle luffing oil cylinder move simultaneously, so that the hydraulic system of the articulating arm type aerial work vehicle has a compact layout and is easy to maintain.

The invention relates to the field of power system frequency control, in particular to a multi-load characteristic-matched under-frequency load shedding optimal control system and a multi-load characteristic-matched under-frequency load shedding optimal control method, which are used in an under-frequency control method that is adopted to guarantee the safe, economical and stable operation of a power grid when an under-frequency fault as the result of the power loss and sudden load proportion increase of the power grid takes place. Generating units are connected with power bus nodes, the power bus nodes are connected with transformer station bus nodes through transformer units, the transformer station bus nodes are connected with load units with different characteristics through power transmission lines, and are also connected with other transformer station bus nodes through power transmission lines, and control units are connected with the transformer station bus nodes and the load units with different characteristics. Besides accident grade-based limitation, the invention can carry out safe and stable operation and realize economical and reasonable operation. With the minimum economical cost as the purpose of under-frequency load shedding control, the invention greatly reduces the economic loss of the frequency control process, and therefore the economic benefit is enormous.

The invention discloses an electric vehicle safety electricity utilization monitoring device. The device comprises a data processing center, a remote management platform, an electric vehicle safety electricity utilization monitor and an information end which achieve remote management of information through a network. The electric vehicle safe electricity utilization monitor comprises an input power supply, a power supply switch, an anti-surge module, a voltage stabilization module, a residual current module, a positive electrode current connection module, a negative electrode current connection module, a safe battery core integration module and a storage battery, the input power supply is connected with a circuit, and the circuit is connected with a circuit temperature control module I and a circuit temperature control module II; and the input power supply is electrically connected with the power switch, the anti-surge module, the voltage stabilizing module and the residual current module in sequence. By adopting the system module, potential safety hazards such as storage battery and circuit temperature, voltage, current, storage battery air pressure and the like generated when the storage battery and the cable of the electric vehicle are charged can be effectively monitored, and unified remote intelligent scientific management is formed.

The invention discloses a processing and preparing method of pot rice, which comprises a method for processing and preparing potato rice with a pot and a method for processing and preparing buckwheat rice with a pot, and solves the problems of poor quality, poor taste and the like of the prepared rice with a pot by generally adopting a mode of raising temperature and adding edible oil in the prior art. According to the processing and preparing method of the rice with pot, the prepared rice with pot is good in taste, fragrant and crisp, capable of tonifying the spleen and nourishing the stomach and good in effect on people with inappetence. The potato and buckwheat rice with pot is economical and reasonable in raw material cost and simple in preparation method, and is suggested to be popularized and used.

The invention discloses a high-strength and high-ductility heat treated steel bar capable of minimizing the amounts of other metal components. The heat treated steel bar comprises the following components: 0.20-0.25% of C, 0.56-0.75% of Si, 1.10-1.65% of Mn, 0.01-0.05% of V, 0.10-0.20% of Cr, 0.01-0.02% of Nb, no more than 0.040% of P, no more than 0.040% of S, and the balance of Fe. The invention also discloses a method suitable for preparation of the high-strength and high-ductility heat treated steel bar. The method is as below: a billet is first treated with hot rolling into a straight bar or a steel wire rod by two technologies, and the hot rolling process is designed to ensure the raw materials needed in the heat treatment process to gain good tissue and original performance; and the steel bar is treated with the heat treatment process to further improve performance of the steel bar. Cost of the invention is economical and reasonable; and a product has yield strength higher than 650MPa, and good ductility and corrosion resistance.

The invention provides a preparation method of nano TiO2 photocatalyst particles. The method comprises the following steps: (1) neutralizing precipitation process; (2) dispersion process; (3) oxidative transformation process; (4) curing process. The method not only solves the problem of easy aggregation of the nano TiO2 photocatalyst particles, enables the product particle sizes to be small, enables the average particle size to be less than 30nm and enables the product to be higher in concentration, but also has a good formaldehyde degradation function under the condition of visible light and overcomes the defect that the traditional photocatalyst works only under the condition of ultraviolet light, thus being wider in application scope. The preparation method does not need high-temperature calcination or water-bath heating, is low in requirements for equipment, simple in technological process and easy to operate and control; furthermore, the preparation method can use general industrial grade raw materials, thus being economical and reasonable in cost; therefore, the method has very high market competitiveness and is easy in realization of large-scale industrialization.

The present invention relates to synthesis process of hollow porous silicon dioxide micro ball. By means of combining O / W / O emulsion and sol-gel technology, using TEOS as silicon source and HNO3 as TEOS hydrolyzing catalyst, and through catalytic hydrolysis reaction at relatively high temperature, the present invention synthesizes hollow porous silicon dioxide micro ball with kerosene as oil phase and Span-80 as emulsifier. The present invention has simple process and cheap material, and the obtained hollow porous silicon dioxide micro ball has wide application foreground in catalysis, selective separation, dielectric material and other field.