35results about How to "To achieve the purpose of increasing production and efficiency" patented technology

The present invention discloses an automobile manufacturing intelligent production scheduling processing method. The method comprises the following steps of: receiving order information input from theoutside, and adding the order information into an order material list; combining product series and product models in the order material list and a preset manufacturing material list to generate a manufacturing material list; and combining the automobile product names and the automatic product codes in the manufacturing material list and a preset process material list to generate a production material list. The production material list of required production is automatically generated according to orders. Because the production material list, the assembling pitch time and the logistics pitchtime of each station in the production are calculated; and according to the pitch time of the manufacturing process of each product and the required produced number, and according to the calculation method in the document mentioned above, on the premise of ensuring the market demand, the production organization is performed by the fewest manpower resource so as to achieve the purpose of the benefit optimization production scheduling.

The invention provides a mineral separation process and system for an ultra-lean magnetite ore. The mineral separation process for the ultra-lean magnetite ore comprises the following steps of sequentially carrying out coarse crushing, intermediate crushing and fine crushing on a raw magnetite ore to obtain a fine-particle ore; carrying out dry magnetic separation on the fine-particle ore, and throwing tailings to obtain a dry concentrate; and carrying out wet grinding and separation on the dry concentrate. The dry pre-separation step is additionally arranged in the mineral separation process, so that the technical problems of high ore grinding and magnetic separation energy consumption, high cost, high mineral separation water consumption, tailing pond construction and the like are solved.

The invention relates to biological organic compound fertilizer prepared from food garbage and a manufacturing method thereof. The manufacturing method of the biological organic compound fertilizer from food garbage is characterized in that raw materials comprise food garbage, peanut cakes, corn husk chops, bone meal, a rapid biological zymocyte fermenting agent of organic fertilizer, an organic material decomposing agent, lysine, water, ammonium nitrate, monoammonium phosphate, potassium sulfate, triacontanol and compound sodium nitrophenolate; the raw materials are mixed uniformly by a double-shaft blade mixing blender and then are processed into power or particles; and through packaging, the power or the particles are prepared into the biological organic compound fertilizer prepared from food garbage. The biological organic compound fertilizer prepared from food garbage has complete nutrient components, contains various nutrients comprising nitrogen, phosphorus, potassium, multipletrace elements, organic acids and the like for satisfying crop growth needs, does not produce pollution, has a low cost and good benefits, solves the secondary pollution problem of food garbage, protects the environment, saves land, and realizes advantages and effects of solid waste resource integrated utilization.

The invention discloses a minimal-tillage dry direct-seeding cultivating method for rice. The minimal-tillage dry direct-seeding cultivating method includes the steps that (1) straw turnover is carried out to cover soil after preceding crops in a rice field are harvested, and meanwhile pre-seeding preparation is carried out on rice seeds to obtain rice seeds to be seeded; (2) the rice seeds to be seeded are directly seeded after strip rotary tillage is carried out on the soil, and fertilizers are deeply applied to the soil; (3) the rice seeds get into the growth period after direct seeding is carried out, ditch infiltration irrigation is carried out on the rice field in the whole growth period, and meanwhile pest control and / or crop smothering control are / is carried out; (4) harvesting is carried out at the right moment according to the growth period of the rice, and next-round crop planting is carried out. According to the minimal-tillage dry direct-seeding cultivating method, minimal-tillage dry direct seeding and water management are combined, the rice seedling bed period is eliminated through minimal-tillage direct seeding, a submergence irrigation technology is replaced by a right-moment irrigation technology, the technical problem that a traditional rice cultivating technology is large in seedling transplantation and working intensity and low in fertilizer and water use efficiency is accordingly solved, and the comprehensive production capacity of a rice cultivating system is improved.

The present invention discloses a sonic oscillation and pulsed combustion type fracturing device. It is a powder column string made up by using two igniter columns and several main powder-charged columns and making them be overlapped together. Every igniter column and main powder-charged column are characterized by respectively adopting cylindrical powder column made up by adopting solid propellant containing ammonium perchlorate oxidant and polysulfide rubber combustion agent, on said igniter columns and main powder-charged columns are set axial central holes and radial through holes which are mutually communicated, in the lower end portion of igniter column an electric igniter is set.

The invention discloses a preparation method of composite microbial fertilizer and prepared composite microbial fertilizer. The preparation method comprises a yeast pre-fermentation step, a compositestrain fermentation step and a post-fermentation treatment step. In the invention, a straw composition is creatively pre-fermented with yeast, and metabolite contained in a fermentation product is suitable for fermentation of a composite flora. The composite microbial fertilizer has wide raw material sources, mild fermentation conditions and strong vigorous species, and after long-term use, the soil micro-ecological environment can be significantly improved, the soil fertility is improved, and the purposes of increasing crop yield and increasing efficiency are achieved.

A cluster-type water temperature control system for a floating tobacco seedling growing pond comprises an external heat exchange type water pond heating device, a plurality of independent water pond water temperature controllers, a control bus and a central control computer, wherein the external heat exchange type water pond heating device is used for heating a water pond; as an external heat exchange type heating mode is adopted, all parts are mounted outside the seedling growing pond, and the modifying and mounting operations are convenient on the basis of a conventional seedling growing pond; the independent water pond water temperature controllers are used for accurately controlling the water temperature of a single seedling growing pond by controlling a combined action of an electromagnetic valve and a circulating water pump; and the independent water pond water temperature controllers are connected with the central control computer through the control bus to form a cluster-type control system for achieving centralized monitoring. By using the system, the water temperature of the floating seedling growing pond can be adjusted to an optimal seedling growth temperature, so that the seedling growing time is shortened, the tobacco seedling quality is improved, and the purposes of improving productivity and efficiency are achieved; and the system has the advantages of convenience for mounting and use, preciseness for control, high automation level and the like.

The present invention discloses a fertilizer, in particular to a new type fertilizer including meat skin powder component, which belongs to the manufacturing technology field for agricultural fertilizer. The present invention is characterized in that: the fertilizer includes a meat skin powder; the meat skin powder is made of glue residue castoff by the glue of the animal skin in the glue factory in the high temperature condition; the new type fertilizer has the advantages of low manufacturing cost, high organic substance content, easy to be absorbed by the crop; besides, the fertilizer can improve the soil quality, increase the production with greater and higher efficient economical benefit.

The invention provides a method and system for recycling sec-butyl acetate in sec-butyl acetate preparation by-product heavy hydrocarbons having the carbon number of 12 or more; the method comprises the steps: under azeotropic rectification conditions, water and the heavy hydrocarbons having the carbon number of 12 or more enter an sec-butyl acetate recycling tower and are subjected to azeotropic rectification, an azeotrope of water and sec-butyl acetate is obtained from the tower top, a mixture of C12-C16 hydrocarbons and a part of water is obtained from the tower bottom, and the content of water entering the sec-butyl acetate recycling tower is 1.1-10 times that of sec-butyl acetate obtained from the tower top in the azeotropic form; the azeotrope of the tower top is condensed and then subjected to oil-water separation, and an aqueous phase product and an oil phase product containing sec-butyl acetate are obtained; and the bottom tower mixture of the C12-C16 hydrocarbons and the water is discharged and cooled and then subjected to oil-water separation, and an aqueous product and a C12-C16 hydrocarbon oil phase product are obtained. The method has the advantages of low requirements on a heat source, low energy consumption, and high yield, the amount of the by-product heavy hydrocarbons having the carbon number of 12 or more is reduced, the sales pressure is relieved, at the same time, the yield of sec-butyl acetate is increased, and the purposes of increasing production and efficiency are realized.

The present invention discloses a method of improving Japanese prawn breeding capacity of a pond. The method comprises feeding water, applying fertilizer, cultivating bentonic organisms, releasing seedlings and harvesting prawns. Before feeding water, a microporous aeration pipe is laid at the bottom of the pond, and connected with a roots blower. In the culture process, the dissolved oxygen concentration is detected, and an aerator is turned on regularly to keep the dissolved oxygen concentration at 3-7mg / L. When releasing seedlings, the seedling releasing density of the Japanese prawn is 20000 per mu. After the basic feed cultivate at the earlier stage in the pond is finished off, high-quality protein compound feed is thrown in the pond according to the growth stage of the Japanese prawn. When the Japanese prawn grows to 2.8-3.2cm, 4.2-4.8cm long acanthogobius hasta is released by 35-45 per mu. According to the present invention, a high-density Japanese prawn breeding technique under the condition of pond culture in North China region, and the pond seedling releasing density of Japanese prawn is increased from traditional 10000 per mu to 20000 per mu. Besides, the survival rate of the Japanese prawn is guaranteed, and increased breeding yield, reduced breeding cost and disease control are achieved. In short, both yield and efficiency are increased.

The invention discloses a walnut-wheat integral cultivation method comprising steps of intercropping the walnuts and the wheat, planting wheat between walnut tree lines, processing walnut seeds, processing wheat seeds, conducting a walnut tree cultivation method and conducting a wheat cultivation method. In the walnut-wheat intecropping configuration step, walnut tree plant spacing distance is 6mx8m; and a walnut tree ventilating and light-transmitting band trench is 1.5m wide. In the step of planting wheat between the walnut tree lines, the wheat sowing width is 6m. By the use of the walnut-wheat integral cultivation method, during the normal year, in relative type area, the output of walnuts (during a full productive age) can be 200kg / 666.7m<2> to 250kg / 666.7m<2> and the winter wheat output can be 300kg / 666.7m<2> to 350kg / 666.7m<2>.

The invention provides a method for preparing potassium chloride from raw carnallite ore. The method comprises the following steps: carrying out flotation on raw carnallite ore slurry in a flotation device by using a flotation reagent to generate low-sodium carnallite slurry; decomposing and crystallizing the low-sodium carnallite slurry in a crystallizer to obtaining crystallizer underflow; screening the crystallizer underflow to obtain an oversize product and an undersize product, wherein the oversize product comprises undecomposed carnallite and sodium chloride particles, and the undersizeproduct is used for generating potassium chloride; and crushing the oversize product, detecting the content of sodium chloride in the crushed oversize product, and if the content of sodium chloride inthe oversize product is higher than a set value, applying the oversize product to generation of the low-sodium carnallite slurry, or if the content of sodium chloride in the oversize product is lowerthan the set value, applying the oversize product to generation of potassium chloride. Compared with the mode that the content of sodium chloride is not detected and oversize products are directly discharged, the method of the invention has the following advantages: materials in the oversize product are recycled again, and the utilization rate of the raw material in the production process is effectively increased.

The invention relates to a multi-species pond polyculture method of penaeus vannamei, adopting polyculture of penaeus vannamei and macrobrachium rosenbergii, pelteobagrus fulvidraco / clarias fuscus and hypophthalmichthys molitrix, and provides a specific polyculture ratio and culture method. The multi-species pond polyculture method of the penaeus vannamei well solves problems that the penaeus vannamei is easy to be ill, mortality rate is high, and benefits are unstable, the multi-species polyculture can effectively utilize breeding space, the macrobrachium rosenbergii, the pelteobagrus fulvidraco and the clarias fuscus can eat weak and sick prawns, prawn diseases can effectively be controlled, the hypophthalmichthys molitrix can eat cyanobacteria to regulate water quality, input cost of bait is reduced, a self-purification ability of a water body is enhanced, and ecological benefits are remarkable. According to the multi-species pond polyculture method of the penaeus vannamei, the survival rate of the penaeus vannamei is high, the scale is large, the macrobrachium rosenbergii, the pelteobagrus fulvidraco / the clarias fuscus with higher economic value are harvested, and economic benefits are considerable.

The invention belongs to the agricultural technical field, and in particular, relates to a cultivation method for interplanting mountainous area forest trees and wheat. In late autumn yearly, wheat isplanted between rows of mountainous area fruit trees, and sowing is performed from the end of September to the middle ten days of October yearly properly. The wheat variety is an approved and popularized high-yield, high-quality and early-maturing wheat having drought resistance and cold tolerance. The cultivation method includes the steps of wheat seed treatment, wheat field preparation, timelysowing, seedling inspection and supplementing, field management, timely harvesting and the like. With adopting of the interplanting mode of forest trees and wheat, and the intercropping of forest andgrain can play ecological effects of regulating air temperature and humidity and reducing moisture evaporation of soil. Yunnan wheat is sown early, in a growing early stage and a defoliation stage ofthe forest trees, shading cooling effects are played on wheat seedlings, and wheat tillering is promoted. In the middle period of growth, sunlight shines directly on the wheat seedlings, and the illumination demand of the wheat seedlings is ensured; in the late period of growth, in early spring, the forest trees begin to germinate and grow leaves, have an effect of shading the ground, reduce the evaporation of ground water, enhance the drought resistance of wheat and facilitate improvement of the yield.

The present invention discloses a sonic oscillation and pulsed combustion type fracturing device. It is a powder column string made up by using two igniter columns and several main powder-charged columns and making them be overlapped together. Every igniter column and main powder-charged column are characterized by respectively adopting cylindrical powder column made up by adopting solid propellant containing ammonium perchlorate oxidant and polysulfide rubber combustion agent, on said igniter columns and main powder-charged columns are set axial central holes and radial through holes which are mutually communicated, in the lower end portion of igniter column an electric igniter is set.

The invention discloses a special nutritional package fertilizer for hot peppers and a fertilizing method, and belongs to the technical field of agricultural fertilizers, the special nutritional package fertilizer for hot peppers is composed of a base fertilizer, a hole applied fertilizer and an additional fertilizer, and the base fertilizer, the hole applied fertilizer and the additional fertilizer comprise the following raw materials in percentage by weight: 67-79% of the base fertilizer, 1.5-3.5% of the hole applied fertilizer and 13.5-17.5% of the additional fertilizer; and the method is scientific and accurate in fertilization according to the growth fertilizer requirement rule of pepper crops, is high in practicability and convenient to popularize and use, and effectively solves the following problems that in the existing chili production process, fertilization schemes are disordered, the fertilization cost is too high, a large amount of agricultural chemical substances are input into a farmland due to excessive use of chemical fertilizers and partial application of nitrogen fertilizers, so that a large amount of harmful chemical substances are enriched in organisms through soil and water, and the production efficiency is improved. in addition, the feed enters crops and livestock and poultry bodies through a food chain, so that food pollution is caused, and human health is seriously influenced; Meanwhile, the content of organic matters in the soil is reduced, the physical and chemical properties of the soil are deteriorated, soil hardening is easily caused, the production capacity is reduced, and large-area pest and disease damage or yield reduction of chilies is easily caused.

Based on the all-weather intelligent control method of the tuyere motor that regulates the room temperature, the overall solution is formulated according to the characteristics and functions of the tuyere motor and the tuyere opening and closing device used in the solar greenhouse of different structures, and the corresponding operating rules and indoor temperature prediction models for all weather scenarios are constructed. The relevant thresholds set by the requirements and the real-time data collected are comprehensively analyzed in real time by the control system computer, and the corresponding real-time commands are generated to control the tuyere motor to adjust the opening degree of the tuyere device in the solar greenhouse, so as to achieve precise regulation of the room temperature within the allowable range of natural environment conditions. Mainly, take into account the emergency environmental conditions such as cloudy weather, wind, rain and snow, etc., and deal with them accordingly. It has the characteristics of all-weather unattended, accurate temperature control, saving human resources, preventing accidental losses due to unexpected weather conditions, low cost of cluster control, safe and reliable operation, and strong practicability. It can be widely used in various production industries of solar greenhouses.

The invention relates to a multi-variety ecological polyculture method for colossma brachypomum. Colossma brachypomum is polycultured with grass carp, silver carp and bighead carp, and specific polyculture ratio and culture method are provided. The problems that the colossma brachypomum is prone to disease, high in mortality and unstable in benefit in a single-variety farming process are relatively well solved; through multi-variety ecological polyculture, culture water space can be effectively utilized; and the silver carp and the bighead carp can eat phytoplankton and zooplankton in water, and the grass carp can feed on mollusks and rotten aquatic plants, so that the concentration of nitrogen and phosphorus in the water is reduced, the self-purification capacity of the water is strengthened, and the method has significant ecological benefits. The survival rate of the colossma brachypomum is high, the grass carp, the silver carp and the bighead carp are harvested, and the method has higher economic benefits.

The invention relates to the technical field of beneficiation, in particular to an extremely low content magnetite beneficiation method and system for associated phosphate minerals. The method provided by the invention comprises the step of carrying out multi-stage sorting, namely finely grinding raw ore, carrying out dry separation on ore fines, carrying out superfine crushing by adopting a high-pressure grinding roller, then carrying out dry separation on middlings, and carrying out dry separation by adopting a V-shaped powder selecting machine and a dynamic powder selecting machine, so thatiron core concentrate and tailings are separated, the next wet type grinding and separation treatment capacity is reduced, grinding and separation energy consumption is reduced, water resource is saved, wetting tailing amount is reduced, and beneficiation cost is effectively reduced.

The invention discloses an automatic production process of an intelligent manufacturing beam yard, which comprises the following steps: step 1, the manufacturing beam yard is divided into a small box beam production area, a double-T beam production area, a cover beam production area, a pier stud production area, a steel bar yard and a laboratory mixing plant, and the steel bar yard is connected with the other five areas; secondly, annular production lines are arranged in the small box beam production area, the double-T-beam production area, the cover beam production area and the pier column production area and used for production of the bridge prefabricated parts; thirdly, a movable trolley is adopted in the annular production line to achieve production transfer, and integral vibration tables without manual vibration are adopted in the double-T-beam production area and the bent cap production area to achieve pouring vibration construction; the device has the advantage of fast circulation operation, improves the production efficiency, saves the consumption of human resources, saves the workshop space, and fundamentally saves the cost investment.

The invention discloses a chili seedling cultivating bio-functional matrix suitable for mechanical transplanting. The matrix is prepared from coco coir, decomposed milch cow bedding, manioc wastes, composite microbial inoculum, a plant growing retardant and an auxiliary material, the seedling cultivating matrix can eliminate the phenomenon that seedlings grow excessively in high temperature and high humidity weather and on overcast day, and the growth of chili root systems is promote; the underground dry weight of chili is increased, tight seedling cultivating lumps are formed, and the matrixis beneficial for mechanical transplanting; the lump scattering rate of mechanical transplanting is effectively reduced, the seedling slowing period is reduced, the production of chili is increased, the efficiency is improved, and the purpose that the matrix is suitable for cultivating chili seedlings transplanted mechanically is achieved.

The invention discloses a special device used for replacing hot shear blades of a bar unit. The special device comprises a blade replacing device body which is of a channel steel structure, wherein aninclined surface is arranged on the groove wall of one end of the channel steel structure; symmetrical positioning holes are formed in the groove wall of the other end of the channel steel structure;and a hoisting part is fixedly arranged on the outer side of the bottom of a groove. The device improves efficiency of replacing blades and the hydraulic cylinder on a special position, guarantees construction safety, effectively reduces construction cost, and improves production efficiency of owners, so that the effect of increasing the yield and improving the efficiency is achieved. The devicecan be manufactured from waste channel steel of different models according to positions of the blades, is liable to realize, and utilizes a waste material to the greatest extent while reducing the cost.

The invention relates to a green Chinese onion nutrient precision management method which includes the steps: 1) determining green Chinese onion yield response coefficient; 2) determining the target yield of a planting plot according to local past green Chinese onion yield; 3) determining yield response (t / ha)=the yield response coefficient*the target yield (t / ha); 4) calculating optimal green Chinese onion nutrient quantity according to the target yield, yield response and agricultural efficiency; 5) determining a fertilization management method according to soil nutrient supply grades and the optimal green Chinese onion nutrient quantity. Nutrient input quantity is precisely calculated according to the target yield of green Chinese onions, a nutrient management method is refined according to production conditions, nutrient precision management for green Chinese onion production can be realized, improper nutrient input and application are avoided, the yield and the quality of the green Chinese onions are improved, the income of farmers is increased, and the yield and efficiency are increased.

The invention discloses a special device for hot scissor blade replacement of a bar machine, comprising a blade replacement device body, and the blade replacement device body is a channel steel structure, wherein the groove wall at one end of the channel steel is provided with an inclined surface, and the other end of the channel steel is provided with an inclined surface. The groove wall is provided with symmetrical positioning holes; the outer side of the groove bottom is fixedly provided with a hoisting piece. The device improves the efficiency of replacing blades and hydraulic cylinders in special positions, and at the same time ensures the safety of construction, effectively reduces construction costs, improves the owner's production efficiency, and achieves the purpose of increasing production and efficiency. The device in the present invention can be made of different types of waste channel steel according to the position of the blade, which is easy to implement, saves costs, and maximizes the use of waste materials.

The invention discloses a directional low-frequency sound wave plug removal device and an application method.The plug removal device comprises a wellhead control device and an underground directional low-frequency sound wave generation device, and the wellhead control device comprises a ground control instrument and a ground sensor; the underground directional low-frequency sound wave generating device comprises an instrument connector, a magnetic positioning instrument, a test sensor, a low-frequency electric signal generating device, a power amplifier and a sound wave transducer; the implementation method comprises the following steps: 1, selecting a blockage removal well and an adjacent well; 2, determining the setting depth of the device; 3, equipment installation; 4, adjusting parameters; 5, starting the directional low-frequency sound wave plug removal device; 6, starting the directional low-frequency sound wave plug removal device of the adjacent well; and 7, detecting the yield of the construction well. The directional function is achieved for low-frequency sound waves, the problems that in the past, the low-frequency sound waves are long in transmission distance but small in energy intensity are solved, the sound wave action intensity between construction wells is increased through a multi-wave interference method, and the purposes of relieving unconsolidated sandstone far-well reservoir mud and sand blockage and improving the recovery efficiency are achieved.

The invention discloses a thermal system for sludge incineration, belongs to the technical field of sludge incineration, and relates to the optimization and transformation and the stable production ofthe thermal system. The thermal system comprises a deaerator, a condensate tank and a steam header, and also comprises a water sealing device; the water sealing device is internally provided with a water sealing cavity, the water sealing cavity communicates with a steam exhaust pipe of the deaerator, and is also connected with a steam evacuation pipe and a water supplement pipe, and the steam evacuation pipe is provided with a regulating valve; the water sealing device also comprises a soft water tank; and the water sealing cavity is filled with soft water through the water supplement pipe, and the soft water in the water sealing cavity communicates with soft water in the soft water tank through a balance pipeline. The thermal system greatly increases the stability of the system, so thatcontinuous production capacity is significantly improved, and thus the purposes of increasing production and improving efficiency are achieved.

The invention discloses a large prefabricated part integral vibration table without manual vibration, which comprises a bottom plate and a trolley assembly, fixed guide rails are fixedly arranged at the two ends of the bottom plate, and a lifting rail assembly is arranged between the two groups of fixed guide rails; a longitudinal vibration assembly is arranged on the inner side of the lifting rail assembly. A transverse vibration assembly is arranged on the outer side of the lifting rail assembly. The trolley assembly is arranged on the fixed guide rail and the lifting rail assembly in a rolling mode. A mold is installed at the upper end of the trolley assembly. The upper end of the bottom plate is provided with a guide assembly used for guiding movement of the trolley assembly and a limiting assembly used for fixing and limiting the trolley assembly. According to the whole vibration table, factory line production is achieved, the defects that a traditional beam field is large in occupied area and long in production period are overcome through the novel mode, manual operation is not needed, the vibration frequency, the vibration time and the vibration part are accurately mastered, and the production efficiency is improved. And the phenomena of voids, pitted surfaces, rib leakage and the like of the concrete caused by reasons such as incompact vibration or vibration leakage and the like are avoided.

The invention relates to an animal feed, in particular to a lick brick which is used to maintain the nutrient balance and health of the Tibetan sheep during the low temperature and low oxygen content of the Tibet plateau. The lick brick comprises the following components: molasses, urea, salt, corn flour, calcium hydrogen phosphate, bentonite, oligosaccharide, ferrous sulfate, potassium iodide, sodium selenite, vitamin A and vitamin D. The lick brick can be used to solve the problems that the plant coarse protein content and the ash content are low in the Qinghai-Tibet area, the mineral elements in soil are not balance and the content of soluble salt is low, thus the situation that Tibetan sheep are lack of nutrient elements owning to imbalance digestion can be improved, the constitution and the growth and development condition are improved, the retention-fat effect can be realized in winter and spring, and the capability of resisting natural disasters, especially the snow disaster can be increased.

The invention provides a method and system for recycling sec-butyl acetate in sec-butyl acetate preparation by-product heavy hydrocarbons having the carbon number of 12 or more; the method comprises the steps: under azeotropic rectification conditions, water and the heavy hydrocarbons having the carbon number of 12 or more enter an sec-butyl acetate recycling tower and are subjected to azeotropic rectification, an azeotrope of water and sec-butyl acetate is obtained from the tower top, a mixture of C12-C16 hydrocarbons and a part of water is obtained from the tower bottom, and the content of water entering the sec-butyl acetate recycling tower is 1.1-10 times that of sec-butyl acetate obtained from the tower top in the azeotropic form; the azeotrope of the tower top is condensed and then subjected to oil-water separation, and an aqueous phase product and an oil phase product containing sec-butyl acetate are obtained; and the bottom tower mixture of the C12-C16 hydrocarbons and the water is discharged and cooled and then subjected to oil-water separation, and an aqueous product and a C12-C16 hydrocarbon oil phase product are obtained. The method has the advantages of low requirements on a heat source, low energy consumption, and high yield, the amount of the by-product heavy hydrocarbons having the carbon number of 12 or more is reduced, the sales pressure is relieved, at the same time, the yield of sec-butyl acetate is increased, and the purposes of increasing production and efficiency are realized.

The invention relates to a micro-ridging, mulching and sowing method for dry-land corn of cold and cool zones. The method has the aims that mulching film covering simultaneously plays a role in micro rainwater collection, soil moisture preservation and temperature increase and the utilization ratio of hydrothermal resources is increased. The method provided by the invention comprises the steps: (1) carrying out soil preparation: deeply plowing at autumn, and harrowing and leveling to preserve soil moisture at the mudding period of thawed soil at early spring; (2) forming micro ridges, wherein faces of the ridges are semi-circular arc-shaped, the width of the bottoms of the ridges is 50cm, the spacing of the ridges is 70cm, the ridging spacing is 120cm, and the height of the ridges is 5-7cm; (3) ditching to fertilize: ditching two rows of fertilization ditches in the outer side of each sowing row, putting a fertilizer in the fertilization ditches in a strip sowing manner, and separating seed fertilizer from seeds; (4) mulching: mulching the ridges and about-15cm-width places of the two sides of the ridges with agricultural polyethylene films; (5) sowing: carrying out rush-early-planting while the soil is damp by using mudding water of soil when the daily average temperature in spring is stably above 7 DEG C or the temperature of 5cm soil layers below ridge side films is stably above 7 DEG C and the field moisture capacity of soil plough layers reaches over 60%; (6) covering sown rows with soil in time, wherein the thickness of covering soil is 2-3cm; (7) pressing, and preserving and raising soil moisture.