390results about How to "Short payback period" patented technology

The method for recovering alkali and hemicellulose from waste liquor produced by producing optical fibre includes the folloiwng steps: making the pressed liquor containing alkali and hemicellulose undergo the processes of prefiltration and fine filtration, and feeding it into membrane separation equipment to obtain the penetrated liquor containing alkali and concentrate containing hemicellulose, and the alkaline liquor concentration in the obtained penetrated liquor can be up to 80-250 g / l, and the final alkali content in the concentrate is 5-30 g / l, and the hemicellulose content is 100-200 g / l. Said technological process is simple, can effectively separate and purify hemicellulose and alkali liquor.

An extracting and separating method of high-temperature coal tar belongs to a coal tar separation method. The extracting and separating method includes the step of adding No.1 or No.2 solvent into the coal tar at the ordinary pressure for secondary extraction and separation. Extraction processes are carried out under the pretreatment condition of sufficiently mixing and heating, heating temperature is lower than 150 DEG C, raw materials of the coal tar are respectively mixed with the No.1 or No.2 solvent according to the volume proportion of 1:2 to 4, extraction time ranges from 1 to four hours, extracts and raffinate are obtained after the No.1 solvent and the coal tar are filtered and separated when the system is balanced, and the No.1 solvent is recovered by distillation and recycled. The extracting and separating method has the advantages that energy saving effect of equipment is evident, process is simple and convenient, operation conditions are moderate, manufacturing cost and investment of the equipment are low and benefits are evident. Adding quantity of the solvent and extraction operation parameters are changed, separation depth and process capacity of the coal tar can be flexibly mastered and selectively controlled.

The invention relates to the technical field of solar photovoltaic glass and provides an antireflective coating solution, which comprises the following components in percentage by volume: 80.0-95.0% of silicon dioxide sol, 0.1-8.0% of titanium dioxide sol, 0.1-5.0% of zirconium dioxide sol, 0-3.0% of cerium dioxide and / or magnesium oxide and / or aluminum oxide sol, 0.1-3.6% of stabilizer, 0.1-3.8% of surface finishing agent, 0-8.0% of volatilization control agent, and 0.2-4.5% of processing assistants. The invention also provides a preparation method of the antireflective coating solution, photovoltaic glass prepared by adopting the antireflective coating solution, and a preparation method of the photovoltaic glass.

A method for recovering noble metal from waste catalysts containing noble metal is carried out by pre-treating for waste catalysts containing noble metal, stage roasting, leaching noble metal into solution, purifying and recovering noble metal from solution. The immersion liquid adopts mixed solution with sodium hypochlorite, hydrion and chlorine ion. It's cheap, safe, clean and complete. It has less pollution and higher recovery rate.

A method for building a big data risk model for electricity charges, involving a risk control method. At present, the payment of electricity bills is carried out in a uniform frequency and in a unified way; on the one hand, there are problems of excessive calls and frequency, and on the other hand, there is a problem that payment cannot meet the target. The invention includes the following steps: 1) data preparation, 2) index system construction, 3) correlation analysis, 4) model construction, 5) model output, and 6) electricity charge risk difference processing. This technical solution focuses on high-risk users and improves the pertinence of reminders. For low-risk users, it is possible to appropriately reduce reminders and notifications, reduce the frequency of reminders, and give priority to the promotion of electronic bills; focus on collection work for high-risk users and increase the frequency of reminders; effectively optimize and concentrate resources to increase the success rate of collections .

The invention discloses a power generation device adopting salinity gradient power. The power generation device comprises a permeating device and water turbines. The permeating device comprises a permeating electrode formed by parallel connection of a plurality of permeable membrane elements and used for dividing strong salt water and seawater into a high-concentration side and a low-concentration side. The water turbines correspond to the high-concentration side of the permeating device and are connected with an engine through a coupler so as to drive a motor to operate. After the strong salt water and the seawater are fed into the high-concentration side and the low-concentration side of the permeating electrode, the permeating electrode can convert permeating pressure difference into hydrostatic pressure on the high-concentration side and exert back pressure in corresponding size by the aid of permeating electrode, and the water turbines can be driven to rotate to drive a generator to operate. The seawater is taken as a low-concentration water supply side and the seawater higher in concentration is used for permeating power generation, so that fresh water resources can be saved, pretreatment cost can be reduced, the permeating pressure difference can be increased, and power density can be increased; instability and difficult grid connection by the power generation mode are avoided due to the characteristics of easy storage of salt.

The invention relates to a self-service check-in management system and method for hotels, which can simplify the check-in procedure, shortens the investment recovery period of the hotels, reduces the operating risk, reduces service staff of a main station, and reduces the operating cost of the hotels. In the process that the system imports the application, the identity authentication of a guest, settlement of articles consumed by the guest and check-out are relatively processed, and the measures basically meet the requirements of the public security sector for hotel management.

The invention discloses a solar energy and biomass complementary combined cycle power generating system capable of continuously running all day. Under the adequate light condition, the system directly utilizes high-temperature concentrating solar energy for completing the gasification reaction of solid hydrocarbon fuel by means of a high-temperature rotating type solar energy gasification reactor, and generated synthesis gas is purified and then is conveyed to a combustion chamber of the gas-steam combined cycle power generating system to generate powder; when the light condition is inadequate, the system utilizes a pyrolysis reactor and utilizes high-temperature molten salt storage solar energy for driving the solid hydrocarbon fuel for the pyrolytic reaction, and an atomizer is utilized for atomizing liquid fuel; and the atomized liquid fuel is conveyed to the combustion chamber of the gas-steam combined cycle system for power generation. The requirement that the solar energy is utilized for continuously converting the solid hydrocarbon fuel into the excellent fuel capable of being used by the gas-steam combined cycle system all day, and meanwhile, the system also can be suitable for other kinds of hydrocarbon solid hydrocarbon fuel like coal.

The embodiment of the invention discloses a method for recovering a pattern sapphire substrate (PSS). The method belongs to the field of photovoltaic technology. The method comprises the following steps: removing an epitaxial layer on the pattern sapphire substrate by adopting an inductively coupled plasma (ICP) dry etching method; and etching the pattern sapphire substrate by adopting a wet etching method after the epitaxial layer is removed. In the embodiment of the method, the epitaxial layer on the PSS is removed by the ICP dry etching method and then the defects of etching damage, squalidity, and the like caused by the dry etching are removed by the wet etching, so that the PSS which can be reused is obtained, the utilization ratio of the PSS is greatly improved, and the production cost of the LED (light-emitting diode) is reduced.

The invention belongs to the technical field of plant cultivation, and particularly relates to a longan planting method. The method comprises such steps as planting land selection, seedling selection, field planting pit preparation, field planting, fertilization management, training and pruning, and disease and pest control. The method is simple and easy to popularize, and can effectively improve the survival rate of longan seedlings; through adoption of a disease and pest control management measure, diseases and pests can be prevented, and thus longan trees have low probability of suffering from various diseases in the planting process; through reasonable fertilization, the longan trees can grow healthily; when the longan trees grow to bloom and yield fruits, flower and fruit thinning is reasonably performed for the longan trees, so as to improve the fruit setting rate and the fruit quality of the longan trees; according to the method, the longan growth can be obviously promoted, the longan yield can be improved, and not only can the economic benefit of a planter be guaranteed, but also the healthy development of the longan planting industry can be promoted. Therefore, the method is relatively high in economic benefit and social benefit.

A method for removing metals and reactivating catalytic cracking agent includes: 1) mixing acidifier composition liquid with catalytic cracking catalyst at liquid-solid ratio of (2 - 10): 1, stirring at atmosphere - 200degC for 1 - 24 hours; 2) filtering the slurry and beating the obtained cakes with deionized water at atmosphere - 100degC for 10 minutes to 6 hours under pH 3.0 - 7.0 controlled with ammonia, and filtering the obtained slurry; 3) beating the obtained cakes from the above step 2 with activated ion composition liquid at liquid-solid ratio of (2 - 10):1 at the same temperature above for 10 minutes to 5 hours, filtering the slurry and recovering the processed catalysts. Its advantages include simple procedure, less investment and short recovery period, to remove pollutant metals and to improve activity and selectivity of the products.

The invention discloses an industrial waste heat utilization system adopting a supercritical carbon dioxide working medium. The system comprises a main technology heat source providing gas or liquid with industrial waste heat, a smoke heat exchanger for heat exchange and a classification serial type composite circulation loop. The classification serial type composite circulation loop comprises a first generator, a first turbine driving the first generator to generate power, a first heat regenerator, a second heat regenerator, a cooler, a gas compressor, a second generator and a second turbine driving the second generator to generate power. A secondary side outlet of the second heat exchanger passes through the first turbine, the high-temperature side of the first heat regenerator, the high-temperature side of the second heat regenerator and the cooler to be communicated with the gas compressor, and an outlet of the gas compressor is communicated with a secondary side inlet of the second heat exchanger and the low-temperature side of the second heat regenerator. The low-temperature side of the second heat regenerator passes through the low-temperature side of the first heat regenerator and the second turbine to be communicated with a high-temperature side inlet of the second heat regenerator. According to the industrial waste heat utilization system, the industrial waste heat utilization efficiency can be effectively improved, and the investment cost is reduced.

The invention relates to a wind power generator tower truss device and using methods thereof. The tower truss consists of a pedestal and a tower body hinged with the pedestal through a hinge; a connecting ear is arranged on the outer surface of the lower part of the tower body; the device also comprises a mandril mechanism which can be connected with the connecting ear. The using methods comprises a method of erecting the tower body and a method of putting the tower body down; and the mandril mechanism can be convenient to erect the tower body and put the tower body down. The wind power generator tower truss device changes the structural form of the prior integrated tower truss, changes the tower body into a combined structure hinged and connected by the pedestal and the tower body, and is convenient to mount and maintain; and the device integrates the advantages of convenient mounting and transportation of an inhaul cable tower truss, absorbs the advantages of attractive appearance, firmness and durability of a conicity tower, has the advantages of low transportation cost, small occupied area, attractive appearance and the like and simultaneously solves the problems that the routine tower has inconvenient mounting and high maintenance cost.

The invention belongs to the field of medicinal material grinding and smashing equipment and method, and particularly relates to a wall-breaking and superfine vibration grinder for a better ground traditional Chinese medicine decoction piece, a traditional Chinese medicine decoction piece preparation method adopting the grinder, and the better ground traditional Chinese medicine decoction piece. The grinder comprises a motor (1), a coupler (2), a rotating spindle (3), a bearing pedestal (4), a drum holder (5), a drum (6), a supporting spring (7), a base, an excitation vibration absorber, a controller, a timer, a liquid crystal display operating panel, a central processing unit and a silencing case. By means of the specific rotating speed and the specific motion trace of the motor of the grinder, the grinder achieves the advantages of energy conservation, high efficiency and smaller sizes of smashed grains.

The invention discloses a roof type photovoltaic array pitch optimizing method based on shadow radiation analysis.The roof type photovoltaic array pitch optimizing method based on shadow radiation analysis comprises the steps that firstly, a building model and geographic position attributes of the building model are obtained; secondly, according to the geographic position attributes of the building model, a laying area of photovoltaic equipment is determined; thirdly, according to the geographic position attributes of the building model and parameters of the photovoltaic equipment, an installation pitch initial value of a photovoltaic array is calculated; fourthly, a static investment target function for unit electric energy is established; fifthly, the photovoltaic array pitch is adjusted to make the static investment of unit electric energy be minimum, and the photovoltaic array pitch with the minimum static investment of unit electric energy is the actual laying pitch of the photovoltaic equipment.By means of the optimizing method, more photovoltaic equipment is laid in a limited area by adjusting the photovoltaic array pitch, the total electricity generating amount is increased, and the static investment of unit electric energy is reduced.

The invention relates to a method for preparing N-type Bi2Te3 based thermoelectric materials by refrigeration crystal bar processing waste. The technical scheme includes that firstly, the refrigeration crystal bar processing waste is grinded, washed and dried, secondly, dried powder is placed into a gas reduction furnace, mixed gas of reducing gas and inert gas is led in, the gas reduction furnace is heated up to reach 200-550 DEG C, the temperature is kept for 1.0-5.0h and is reduced to room temperature, and the refrigeration crystal bar processing waste with impurities removed is obtained. The refrigeration crystal bar processing waste with the impurities removed is placed into a quartz tube, and according to the chemical formula (BixSb2-xTe3-ySey, wherein 1.5<=x<=2.0 and 0.1<=y<=0.7) of the N-type Bi2Te3 based thermoelectric materials, Bi, Te, Sb and Se raw materials with purity higher than 99.9wt% are added. Finally, the quartz tube is packaged in an evacuated manner and is smelted in a heating furnace at the temperature of 580-850 DEG C, the temperature is kept for 0.5-5.0h, the quartz tube is cooled along with the furnace, and an alloy ingot in the quartz tube is taken out, so that the N-type Bi2Te3 based thermoelectric materials are obtained. The method has the advantages of simple process, short recovery cycle, less environmental pollution and low cost.

The invention discloses a generator simulation parameters calibrating method by using a measured trajectory and the trajectory sensitivity, and the method mainly aims at the status quo that certain parameters of the generator is difficult to be obtained through the delivery test, and the parameters identification can not get rid of the limitation of the power system simulation model and parameters, furthermore, can not obtain the generator simulation parameters online. The generator parameters sensitivity to the simulation trajectory can be obtained through estimating the error between the measured trajectory and simulation trajectory, and the trajectory sensitivity is sequenced so as to determine the simulation parameter set which greatly affects the measured trajectory, the rectifiable parameters can be optimized and rectified by using the optimization method, thereby obtaining the generator simulation parameters which make the measured trajectory conform to the simulation trajectory. The method avoids the dependence on the model in traditional generator parameter identification method, has simple calculation and online application potential, and can be applied to other component simulation parameter calibration in the power system.

The invention discloses a one-year-two-harvest cultivation method for sunlight greenhouse grape first-fruit in a north area. The method comprises the following steps: 1) selecting variety; 2) managing in planting year; 3) managing in the second and later year. According to the method, the high yield in current year and one-year-two-harvest effect of grape first-fruit are realized by utilizing the effective regulation of sunlight greenhouse for the temperature in each growth period of the grape, taking the management technical measures of reasonable watering fertilizing, pinching and tip-remaining, trimming fallen leaves, accelerating germination, and the like, stimulating the winter buds to germinate in the same year and starting the second growth period in the same year; the growth period and harvest period of the fruit at two times are totally not overlapped; and meanwhile, through the reasonable temperature regulation of the sunlight greenhouse, the two mature periods can avoid the concentrated marketing period of open-air grape in the north area; the second mature period is during New Year's Day and spring festival when no fruit is marketed in the north area; the period of investment return is greatly shortened; the planting benefit is doubled.

Disclosed is a controllable piquid of swamp processing equipment, the fermentation of marsh gas system mainly comprises of solar energy heating barn, more than two fermentation of marsh gas pool connected together in-line and its entrance for material and exit for material, feed inlet and discharge outlet auxiliary heating system and other parts. The fermentation of marsh gas pool includes material exhausting chamber, pool and steal cover of it; the solar energy heating barnincludes the frame and plastic film covering on it; the auxiliary heating system comprise of heating furnace and heating recycling pipe which has recycling water pump and value on it, its one end is linking to the material exhausting chamber of fermentation of marsh gas pool and another one to the heating water jacket in the heating furnace, the heating-recycling piquid of swamp recycling auxiliary heating system through the their covers. The invention is an auxiliary heating marsh gasengineering suitable for scalized pig farm, mainly aiming at solving problems existing in conventional marsh gas pool, such as fermentation in low temperature, insufficient time for production, small ratio of volume and productivity and so on. The conventional marsh gas pool cannot assure the stable temperature and productivity for marsh gas, while the engineering makes use of solar energy heating and auxiliary heating equipment, which has solved the problems above completely, and its advantages includes: (1) reasonable in structure and practical in technology; (2) has remarkable economic benefit, high productivity and short term for compensating investment, about 1.23 years; (3) is suitable for payoff pariod and waste water procession in scalized pig farm, with high processing efficiency, has supplied a new processing approach for pig farm .

A distributed power generation and energy storage system based on a hydrogen fuel cell car comprises a hydrogen energy internet management platform network connection hydrogen fuel cell car, a charging and discharging power transmission system, a vehicle-mounted energy storage system, a two-way charging and discharging pile power transmission system, a charging and discharging pile energy storagesystem, a hydrogen energy internet management platform, an internet of things and a block chain technology management system, a water-electrolytic hydrogen production, photoelectric combined hydrogenproduction and electric energy consuming compound hydrogen production and hydrogen storage device, a hydrogen refueling station, a mobile hydrogen refueling station, a hydrogen transporting vehicle and a power grid; and the matching between a power generation time of the social hydrogen fuel cell car and a power grid peak demand is intelligently managed and adjusted. The distributed power generation and energy storage system based on the hydrogen fuel cell car has the advantages that complete cleaning and zero emission of traffic energy can be realized, the energy is effectively recycled and utilized, the investments of the power grid and a power station are saved, the safety and energy utilization efficiency of the power grid are enhanced, the national power grid is balanced, natural distribution of virtual distributed energy storage power stations is realized, incomes are brought to assets and owners, shared investment of green traveling is realized, social resources are sufficientlyutilized, and popularization and application of green traffic are promoted.

The invention discloses a hydrogen vehicle capable of producing hydrogen by alcohol cracking, comprising a heating part, a control part, an alcohol gasifying and cracking part, a hydrogen engine and a synthesis part, wherein the heating part comprises a vehicle tail heating device and a special electric heater, and can instantly convert liquid methanol into gaseous methanol under the instruction of a vehicle starting control system; the control part monitors the rotation speed of the engine through an electric control unit and controls the emitted dose of the methanol in a cracker through the opening of a throttle valve; the alcohol gasifying and cracking part comprises a carburetor and the cracker, the gaseous methanol from the carburetor enters the cracker, and the hydrogen produced by cracking enters a cylinder of the hydrogen engine; and the synthesis part comprises a temperature controller, a throttle, an alcohol fuel tank, a cooling tank, a mixer, an air filter and the like. The hydrogen vehicle provided by the invention adopts the alcohol-cracking hydrogen producing technology, uses the methanol which is cheaper in renewable energy sources as the vehicle fuel, is economic and environment-friendly, and no longer depends on the traditional petroleum energy resources of gasoline or diesel oil.

The invention provides a heating system by the utilization of waste heat of blast furnace slag flushing water and a method thereof, so as to effectively recover waste heat of blast furnace slag flushing water, supply heating to users and achieve the purse of energy saving and emission reduction. The heating system by the utilization of waste heat of blast furnace slag flushing water contains a blast furnace slag flushing system, a sedimentation basin, a water suction pool, a first slag slurry pump, a filter, a heat exchanger and a heating pump. A slag flushing water outlet of the blast furnace slag flushing system communicates with the sedimentation basin, which communicates with the water suction pool. A water inlet of the first slag slurry pump communicates with the water suction pool. The water outlet communicates with a slag flushing water inlet of the filter. A slag flushing water outlet of the filter communicates with a first water inlet of the heat exchanger. A secondary heating water outlet of the heating pump communicates with a secondary water inlet of the heat exchanger. According to the invention, waste heat of blast furnace slag flushing water is fully utilized for heating. Therefore, investment cost is low and recovery period is short. In addition, in comparison with present bunker coal heating, the heating system provided by the invention has advantages of no discharge of gases such as SO2, NOX, CO2 and the like, energy saving and environmental protection.

The invention relates to the fields of planting and breeding growth condition control systems and solar energy storage and supply, in particular to a cross-season planting and breeding growth condition control system and a solar heat-supply warm-supply refrigeration power generation system. The system comprises an external heat insulation system, a light transmitting system, a planting and breeding part, an energy collecting system, an energy storage system, an energy supply system, a ventilation system, a light supplement system, an aeration system, a water collecting device, a temperature, humidity, irrigation and fertilization control system and the like. The planting and breeding growth greenhouse system is built, through a heat collecting system and a heat storage system, the solar energy beyond the energy required by growth is collected and stored in the energy storage system, the energy required by greenhouse cooling is reduced, a greenhouse is heated by using collected heat and stored heat in winter, and it is achieved that plants and bred objects effectively grow in winter in the north. By means of the system, it can be achieved that planting and breeding are high in yield, excellent in quality, efficient, ecological and environmentally friendly, the energy collection and storage efficiency is high, the unit output cost is low, the economic and social benefits are high, and a new path is provided for green, low-carbon and cyclic development of agriculture.

The invention relates to a heating-furnace cogeneration system and a method thereof, and belongs to the field of waste energy and heat recovery. The cogeneration system comprises a heating furnace, a heating-furnace waste heat boiler, a heating-furnace air preheater, a heating-furnace heat-pipe coal gas preheater, a heating-furnace tail suction fan, a superheated steam boiler, a turbogenerator set and a chemical water system, wherein the heating-furnace tail is orderly provided with the heating-furnace waste heat boiler, the heating-furnace air preheater, the heating-furnace heat-pipe coal gas preheater and the heating-furnace tail suction fan along the fume flow direction, and used for recovering the fume waste heat of the heating furnace; the heating-furnace waste heat boiler is used for generating electricity; and the chemical water system is used for providing supplementary water for the heating-furnace waste heat boiler and the superheated steam boiler. The invention enables the superheated steam boiler to still ensure the low-load stable operation of the cogeneration system when heating furnace is to be rolled, increases the steam parameter of the heating-furnace waste heat generating equipment by utilizing the superheated steam boiler, and enhances the generating efficiency. The invention maximally recovers the waste heat of the heating furnace, thereby having favorable economic and environmental benefits and high values for application and popularization.

The invention discloses an automatic mobile phone recovery method and an automatic mobile phone recovery terminal. The automatic mobile phone recovery method includes establishing data connection between the automatic mobile phone recovery terminal and a mobile phone to be recovered when a connection request of the mobile phone to be recovered is detected; detecting the mobile phone to be recovered based on data connection so as to obtain a detection result; analyzing the detection result to obtain and display a corresponding quoted price of the mobile phone to be recovered; when a confirmation command based on the quoted price is detected, recovering the mobile phone to be recovered and paying to a beneficiary account inputted by a user. The automatic mobile phone recovery method and the automatic mobile phone recovery terminal have the advantages that an automatic recovery process of the automatic mobile phone recovery terminal replaces a manual recovery process, so that manual operation complexity is overcome, and the mobile phone recovery process is simplified; many operation steps are decreased, and accordingly a mobile phone recovery period is shortened and mobile phone recovery efficiency is improved.

The invention relates to the field of environmental protection facilities and equipment, in particular to a marsh gas preparation method of a system for preparing marsh gas from domestic garbage. Themarsh gas preparation method comprises the following steps: pretreating, by a pretreatment apparatus on garbage, storing and transporting the pretreated garbage by virtue of a storage and transportation apparatus, transporting the garbage to a crushing apparatus, crushing the garbage, fermenting the crushed garbage by virtue of a fermentation apparatus, storing the fermented garbage by virtue of astorage apparatus, desulphurizing and dehydrating the stored garbage by virtue of a desulphurization and dehydration apparatus, pressurizing the desulphurized and dehydrated garbage by virtue of a pressurizing apparatus, purifying by virtue of a purifying apparatus, and finally storing the purified marsh gas in a storage tank. By adopting the marsh gas preparation method, the recycling degree ofthe garbage can be maximally increased, the equipment is simple, the garbage is thorough in treatment, the cost is low, the investment return period is short, the energy utilization rate is high, thewaste utilization is realized by preparing the marsh gas from the garbage, the living fuel and electric charge can be saved, and the application prospect is promising.

The invention provides a method for treating electroplate rinsing wastewater, mainly comprising the following steps: (1) classification and collection of electroplate rinsing water; (2) efficient fiber filtration; (3) light-catalyzed reaction; (4) ultrafiltration (UF) by a filtering system; (5) membrane filtration by a reverse osmosis (RO) system; (6) separation of dialysis fluid by an RO membrane and recovery of the dialysis fluid in a finished-product water tank; and (7) separation of strong liquor recovery by an RO membrane and recovery. The method for treating the electroplate rinsing wastewater is used to realize wastewater recycling, reduce the rinsing water usage amount, achieve the zero emission requirement of the wastewater, and decrease the scale of biochemical and physical treatment; the method for treating the electroplate rinsing wastewater is beneficial to the expansion requirement of enterprises, and is used to recycle useful metal ions, thus leading the enterprises to generate benefits at the same time of achieving the purpose of being environment-friendly; and the system is convenient for operation, and occupies less area.

The invention discloses Al-Ti-B master alloy and a preparation method thereof, wherein the Al-Ti-B master alloy is prepared by main materials and auxiliary materials, the main materials are a primary aluminum liquid, potassium fluotitanate and potassium fluoborate, and the auxiliary materials are a refining agent, a covering agent and remelted aluminum ingots. The Al-Ti-B master alloy is characterized in that the alloy consists of the following ingredients in percentage by weight: 97 to 99 percent of potassium fluotitanate, and 97 to 99 percent of potassium fluoborate, wherein the content of titanium is 17 to 19 percent, and the content of boron is between 6 and 8 percent; and in the primary aluminum liquid, the content of silicon of is between 0.01 and 0.1 percent, the content of iron is between 0.001 and 0.12 percent, and the content of aluminum is between 99.97 and 99.99 percent. The adding amount of alloy and the primary aluminum liquid (calculated as a 10T furnace) is 8 to 9T of the primary aluminum liquid, 1 to 1.5T of potassium fluotitanate, 1 to 1.5T of potassium fluoborate, and a proper amount of refining agent and covering agent. The master alloy and the preparation method have the advantages that the preparation method greatly reduces investment cost, shortens production period, simplifies production technology, reduces processing cost, and achieves the aims of energy conservation and environmental protection.

The invention discloses a modularized-assembly house system. The modularized-assembly house system is characterized in that the modularized-assembly house system comprises one or more houses (1) formed by modularized production; the houses (1) within two layers extend horizontally infinitely; each house (1) comprises a steel-structure frame (2), thin-walled cold-formed steel system wallboards (3), a thin-walled cold-formed steel system floor slab (4) and a thin-walled cold-formed steel system roof (5); the steel-structure frame (2) comprises cross beams (2.1) and stand columns (2.2), the upper cross beams (2.1) are parallel to the lower cross beams (2.1), and the stand columns (2.2) are connected vertically with the cross beams (2.1); eight corners formed by encircling of the cross beams (2.1) and the stand columns (2.2) are connected through connectors (7). The modularized-assembly house system has the advantages that the defects of inconvenience in assembly and disassembly, poor combination and unsuitability for complex environments in the prior art are overcome, and disassembly, interchange and addition or reduction are achieved.

The invention discloses a cultivation method of sweet elephant grass. The cultivation method comprises adopting mature sweet elephant grass stem sections as seedlings, performing cultivation in an asexual mode and performing rapid expanding propagation through stem section cutting or root stock plant division transplanting; directly planting on the field when the soil, climate and management conditions are good; performing watering every day in the seedling growing period to maintain the moist soil, performing once topdressing of organic fertilizer and compound fertilizer until plants are grown to 60 cm height and combining with soil loosening to perform once watering and topdressing in two days after every time harvest; harvesting which comprises performing interlacing harvest from spring to early summer, wherein the harvest height is 2.5 to 3.5 m. According to the cultivation method of the sweet elephant grass, different operation processes are implemented according to the four seasons and accordingly the yield per mu of the sweet elephant grass can be improved by 60 to 70 tons, the quality of the sweet elephant grass is high, the requirements of the livestock and poultry industry can be met, the economic benefit is improved, the investment return period is shortened, and the agricultural sustainable development is implemented.