100results about How to "Alleviate supply shortages" patented technology

The invention provides an improved production process of utilizing gypsum to produce sulfuric acid and cement, which relates to the sulfuric acid and cement industry production technology, and the resource comprehensive utilization and environmental protection governing field of the industrial byproduct gypsum. The improved production process is characterized in that natural gypsum with the CaSO4*2H2O as the main composition or the industrial byproduct gypsum is adopted as the main source material; clay, coke and fly ash clinker are used as supplementary materials; the half-water drying gypsum flow, the single stage powder grinding, raw material mixing melting, suspension preheater kiln decomposing calcination, closing diluted acid washing and purification, two-turning and two-suction processes are adopted; the sulfuric acid and cement products are prepared through six steps of source material homogenizing, drying and dehydration, raw material preparation, clinker burning, kiln gas acid production and cement grinding; the improved production process has the advantages of wide range source material, solving the land occupation and environmental pollution problems of the gypsum waste residue, realizing the circulation utilization of sulfur resource, adopting a plurality of new processes and devices, realizing the large scale production easily, advanced technology, mature process, easy operation in production control, low energy consumption, high benefit, no waste water and waste residues exhaust.

The invention discloses a method for preparing aromatic hydrocarbon by coal tar oil. The method comprises the following steps: carrying out atmospheric and vacuum distillation after pre-treating the coal tar oil to obtain a straight-run naphtha fraction; coking, cracking or hydrotreating the rest of fractions to obtain the naphtha fraction, or pre-treating the coal tar oil, coking, and then, cracking or hydrotreating, and then carrying out atmospheric and vacuum distillation to obtain the naphtha fraction; pre-fractioning and chopping the naphtha fraction and the straight-run naphtha fraction to produce raw material components for producing the aromatic hydrocarbon; desulfurating and denitriding through the pre-hydrotreating to obtain a reforming raw material; reforming to obtain a lightweight aromatic hydrocarbon mixture; separating the lightweight aromatic hydrocarbon mixture to obtain benzene and toluene; and further carrying out isomerization onto the C8 and C8+ components of the aromatic hydrocarbon to obtain the benzene or benzene and paraxylene. According to the method for preparing aromatic hydrocarbon by coal tar oil disclosed by the invention, the coal-based naphtha is sufficiently utilized, the whole process is higher in aromatic hydrocarbon yield, a novel reforming raw material is provided, and a problem that the existing reforming material petrol-based naphtha is insufficient in supply is relieved.

The present invention pertains to the art of medical technology and discloses a novel raw material for Schisandraceae lignans extracted substance and a preparation method thereof. The process takes Chinese medicine Schisandraceae stem (fruit stalk) and Schisandraceae leave as the raw material and adopts one or a plurality of solvent extraction method, resin absorption method, positive-phase column chromatography, reverse-phase column chromatography, etc. after grinding, so as to prepare the extracted substance with 30 to 95 percent of total lignans content. The preparation method has simple process, stable content and good repeatability. The extracted substance can be used as medicine or health food instead of Schisandraceae lignans extracted substance, which makes full use of Schisandraceae resource and releases the short supply of Schisandraceae fruit.

The invention discloses a mechanism sand dry-mixed mortar and a preparation method thereof, belonging to the technical field of building materials. According main points in a technical scheme of the invention, the mechanism sand dry-mixed mortar comprises the following components: cement, tailing sand, natural river sand, fly ash, a water-retaining thickener, redispersible latex powder, metakaolin, shell powder and a polycarboxylic acid water reducer. According to the invention, the tailing sand widely available is used as a main fine aggregate, and the compounding of the natural river sand and mechanism sand can make up for the problems of poor grading characteristics and grain shape defects of the mechanism sand; by strictly controlling the content of stone powder in the tailing sand, the processing properties of drying and grading of the tailing sand are improved; gaps in the dry-mixed mortar are filled in by the metakaolin and shell powder, so the compactness and impermeability ofthe hardened mortar are enhanced; the water-retaining and thickening properties of the dry-mixed mortar is improved through the water-retaining thickener; and the raw materials of the dry-mixed mortarare improved in dispersion uniformity and workability is improved, and the adhesion between the raw materials of the dry-mixed mortar is enhanced.

The invention provides a formula for preparing a regenerated concrete block material by using high activity regenerated powder and a regenerated aggregate. The invention further provides a productionmethod of the regenerated concrete block material based on a system of 'regenerated powder-regenerated coarse aggregate-regenerated fine aggregate'. The regenerated concrete block material prepared byusing the system of 'regenerated powder-regenerated coarse aggregate-regenerated fine aggregate' has excellent mechanical strength, the strength level range is 5-50 MPa, and the requirements of the concrete block material strength under different working conditions are met. The invention provides a novel developing route for the resource recycling of construction wastes. The performance of the regenerated powder is similar to the performance of mineral admixture such as fly ash and the like, the activity is higher, secondary hydration reaction of a cement-based material can be promoted to relieve the current situation of insufficient supplying of mineral admixture such as fly ash and the like, and the regenerated concrete block material has higher economic benefit and social benefit.

The invention discloses a preparation method for activated carbon fibers with a photocatalysis function. The activated carbon fibers for immobilizing graphite phase carbon nitride are prepared by an electrochemical deposition method by taking activated carbon fibers, dicyanodiamine, N,N-dimethylformamide and the like as main raw materials. The activated carbon fibers have an adsorption function and the photocatalysis function. Under a condition of darkness or insufficient light, pollutants can be purified under the adsorption function of the activated carbon fibers; under a condition of sufficient light, the pollutants can be purified under the adsorption function and the photocatalysis function; in-situ regeneration of the adsorption function of the activated carbon fibers can be realized; labor, resource and financial consumption of a regeneration process is greatly reduced. Successful research on the activated carbon fibers has an important significance for relieving of insufficience of activated carbon fiber supply in China.

The invention discloses a preparation method of fish scale gelatin of bighead carp. An ultrasonic-assisted, short-term and low-temperature water extraction method is employed to prepare the fish scale gelatin of bighead carp, and bighead carp scale is taken as raw material. Production yield of the scale gelatin is increased, and the gel strength and the gel melting temperature are guaranteed effectively. Beneficial effects of the method are that: the ultrasonic technology which is capable of breaking collagen can be used to increase the production yield of the scale gelatin effectively; the quality of the product is guaranteed by the short-term and low-temperature extraction method, and the application value of the product is improved; and the scale gelatin is possible to take place of mammalian gelatin for application in some fields, so that problems of the safety and limitation of gelatin are solved, and a problem that the demand for the mammalian gelatin exceeds the supply will be solved to a certain degree. [0]

A dedicated fertilizer for promoting grain-filling in rice and a preparation method therefor, belonging to the technical field of fertilizers for agricultural production. The fertilizer is prepared by using the following raw materials in parts by weight: 40-50 parts of urea, 18-30 parts of superphosphate, 12-27 parts of potassium chloride, 7-15 parts of potassium silicate, 3-5 parts of bentonite, 4-11 parts of sodium tetraborate decahydrate, 0.1-0.3 parts of N-(N-butyl)thiophosphoric triamide, 0.2-0.8 parts of matrine extract, 0.5-1.1 parts of kudzu extract and 0.5-1.0 parts of aloe extract. A product of the present invention can remarkably promote yield when applied to rice, the production cost is reduced, and the utilization rate of nitrogen fertilizer is improved.

The invention relates to a method for preparing special old mugwort flosses and mugwort sticks by a moxibustion method in the acupuncture and the moxibustion of the traditional Chinese medicine, which comprises the following steps: airing the collected fresh mugwort leaves, removing impurities thereof, then pulverizing the mugwort leaves, extracting 60-80% of mugwort leaf oil by an industrial extraction method, afterwards further crushing the obtained mugwort leaf residues into flosses and preparing the mugwort sticks or the mugwort flosses.In the invention, the industrial extraction method is adopted to quickly extract and remove most of the mugwort leaf oil in the crude mugwort leaves, thereby obtaining the old mugwort sticks and the old mugwort flosses which meet the requirements of the acupuncture and the moxibustion in a short time, reducing the preparation time of old mugwort greatly and being beneficial to ease the situation where the supply of the old mugwort flosses and the old mugwort sticks prepared from the old mugwort lags behind demand.

The invention discloses a method for reusing waste cigarette-used cellulose acetate fibers, which comprises three steps as follows: firstly, waste cellulose acetate fiber tows are cut into pieces with 2mm-5mm in length; and then the pieces are mechanically opened or dispersed by airflow so as to obtain cellulose acetate chopped fibers with 1mm-4mm in length, and 10%-100% of the cellulose acetate chopped fibers are added into papermaking raw materials; and finally, filter base materials regenerated by the waste cellulose acetate fibers can be prepared through the dry process papermaking technology or the wet process papermaking technology. The method is small in investment scale, is simple in operation, avoids the monopoly sale problem, reduces intermediate links of the tows, further restrains occurrence of counterfeit cigarettes, and more importantly, solves the problems of social energy consumption and environment security. The prepared cellulose acetate chopped fibers completely retains the original structure and form, is centralized in length and distribution, and is more suitable for producing filter stick paper core base materials by means of dry process or wet process.

The invention relates to the technical field of foundation pit construction, in particular to a system and method for washing, filtering, purifying and separating sandy soil in foundation pit excavation. The system comprises a feeding device, a separating device, a sand washing device and a dewatering device. The feeding device comprises a cleaning tank and a chain bucket conveyor, wherein one endof the chain bucket conveyor is arranged in the cleaning tank and used for conveying the residual sludge soil in the cleaning tank to the separating device, the separating device comprises a roller screen used for screening and separating the particle size of the residual sludge soil conveyed by the chain bucket conveyor, the sand washing device is used for washing fine materials screened by theroller screen, and the dewatering device comprises a dewatering screen used for carrying out vibration dewatering on the fine sand washed by the sand washing device, so that the excavated sandy soil can be subjected to mud and sand separation near a foundation pit construction site, separated finished sand can be reused, and the system has remarkable economic benefits; and compared with transportation building residual sludge, the generated waste sludge is high in reduction degree, low in water content and convenient to transport, and the transportation cost is greatly saved.

The invention belongs to the field of solid concrete filled steel tubes in industrial and civil construction in coastal regions and islands, and provides an overall sea concrete filled steel tube component and an application method thereof. The overall ocean concrete filled steel tube component is manufactured by using coral as coarse aggregate, sea sand as fine aggregate and adding seawater and cement in a certain proportion. The mixing proportion is the same as that of normal concrete, but the coarse aggregate is the coral and the fine aggregate is the sea sand. The overall ocean concrete filled steel tube can be used for replacing the normal concrete component in mainland region and can be used for various buildings in sea regions to realize the aim of using local materials, so that the virgin coral, sea sand and seawater in the sea can be sufficiently utilized, the strategy of sustainable development is satisfied; and furthermore, the transportation cost is saved.

The invention discloses a method for promoting synchronous development of sexual glands of takifugu obscurus male and female parent fishes, comprising the following steps of: screening parent fishes, rearing by adopting dim light in a parent fish rearing process, and promoting the development of the sexual gland of the takifugu obscurus by adopting means such as reducing illumination intensity, controlling water temperature, stimulating with running water and the like. Meanwhile, 1 per mill of Chinese herbal medicine, VE and edible salt are added into feed, animal feed such as lobster, musselmeat and the like are thrown and fed in the later stage of the rearing process to carry out strengthening rearing; pre-acceleration of maturation physiological regulating means is carried out twice, thus the problem that the development of the sexual glands of the takifugu obscurus male and female parent fishes is asynchronous, the situation that fry of the takifugu obscurus is in short supply can be alleviated, the takifugu obscurus can be artificially bred and released without consuming resource of wild parent fish, and a phenomenon that natural resource of the takifugu obscurus is sharply reduced owning to influence of economic activity of human can be avoided.

The invention relates to a road wind generator, which belongs to the field of wind driven generators. The road wind generator has three mounting position modes on railways, express highways, subway tunnels and the like for land transport devices, and the three mounting position modes include the lateral surface on one side of a driveway, the lateral surface in the middle of opposite running driveways, and the top part in the middle of the opposite running driveways; a wind axle vertical to an opposite surface in a driving direction is arranged on the road wind generator and is connected with afan blade, and a one-way bearing is connected with a top cover and a bottom cover; a valve is connected with an air deflector through a door spindle, and the air deflector is connected with the top cover and the bottom cover; a gear is connected with the wind axle and is in meshed connection with a speed changer, and the speed changer is in meshed connection with a generator rotor shaft; and a supporting rod is connected with and fixes a machine body. The road wind generator uses the wind energy generated by the land transport devices of trains, automobiles, subway locomotives and the like inmoving, changes the wind energy into electric energy to change the waste into valuable, and can use natural wind energy to generate electricity so that the road wind generator accords with a nationalpolicy for environmental protection, energy-saving and emission reduction; besides, the road wind generators can be continuously arranged along the driveway direction to form generating sets for providing electric power for stations, towns and countries and parallel power supply on the way and providing electric power for electric locomotives and motor train units.

The invention relates to a spinning process for a terylene industrial yarn, in particular to a one-step direct spinning process for the terylene industrial yarn, belonging to the field of textile. The process in the invention fills a gap of polyester fiber for a localization continuous solid phase polymerization, spinning and drawing one-step process route production industry, a fluidized bed type pre-crystallizer and a stirring type crystallizer are adopted, a second rotary valve is added to control feeding speed, a third rotary valve is used for separating an air system and a nitrogen system, potential difference is utilized to continuously add material into the pre-crystallizer, slices are crystallized in a continuous fluidized bed pre-crystallizer, the slices crystallized to a set crystallinity is continuously added into the stirring type crystallizer to be further crystallized by utilizing the potential difference, PET (polyethylene terephthalate) slices are heated to a temperature required by solid-phase polymerization in a preheater and then continuously enter into a solid-phase polymerization tower to be subjected to solid-phase polymerization, and the preheating, solid-phase polymerization and drying process are all carried out in a nitrogen medium. The yield is high, the process is simple, and the production is easy to control.

The invention discloses a preparation method of a recycled cementing material, which comprises the following steps: (1) homogenizing waste calcareous powder and waste clay powder to obtain mixed powder; (2) carrying out heat treatment on the mixed powder to obtain activated mixed powder; and (3) uniformly mixing the activated mixed powder with an excitant to obtain the recycled cementing material.The preparation process of the recycled cementing material provided by the invention is simple, and the prepared recycled cementing material can replace cement and other traditional mineral admixtures, is directly used for preparing concrete or other cement-based materials, and has no influence on the compressive strength of the concrete or other cement-based materials. The method not only solvesthe problems of large stacking amount of waste concrete and harm to the environment at the present stage, but also solves the problem of insufficient high-quality clay resources, has good industrialvalue, provides a new thought for large-scale consumption of building solid wastes for preparation of mineral admixtures in the future, and has remarkable social and economic benefits.

The invention belongs to the technical field of medicines and discloses a method for rapidly preparing total lignans and total saponins from schisandra chinensis. The method is characterized by taking the fruit (pulp), rattans and fruit stems of the traditional Chinese medicine schisandra chinensis as the raw materials, adding multiple times of water and an organic solvent after grinding the raw materials, then carrying out flash extraction for multiple times within 10min at low temperature (room temperature), obtaining the total lignans, with content being more than 50%, from schisandra chinensis after being extracted by the organic solvent and preparing total saponins, with content being more than 50%, from schisandra chinensis after resin purification. The method has the following advantages: (1) the active ingredients have high content and are not damaged; (2) the extraction time is short and the extraction efficiency is high; (3) the energy consumption is relatively low; and (4) the method is simple and convenient to operate and easy to popularize and use.

The invention relates to a method for designing mixing ratio of construction waste for asphalt mixture, which comprises the following steps of: utilizing suitable waste source, establishing a buildinggarbage crushing model and a crushing process, and proposing a new crushing process; a recycled aggregate is obtained through the new crushing process, the corresponding matching ratio design is carried out, the design of the index data is detected to meet the latest specification requirement, then, the test data is used to optimize the gradation design, and RCA with different dosage is used to replace part of raw materials in road construction, and the possibility and feasibility of the construction waste for the asphalt mixture design are ensured; in this way, replacing the natural crushedstone with the construction waste generated by the waste building, which is used as the main raw material of the road construction; not only can the resources be saved, but also the influence of the construction waste on the environment can be relieved, the problem of insufficient supply of the natural aggregate in the construction process can be relieved to a certain extent, and the supply of high-quality aggregate is provided; the method has a remarkable environmental protection meaning, economic significance and social benefit.

The invention discloses a cement solidification strength ultra-early prediction method, and belongs to the foundation treatment and sludge solidification. The method comprises the following steps: determining a series of model fitting parameters unrelated to temperature and proportion by development related preliminary experiment at an investigation stage based on a strength increasing model in consideration of the cement solidification sludge under the temperature influence, and then sampling at the cement solidification sludge at the construction stage, and performing early strength acceleration testing under a predetermined high-temperature condition, and predicting the middle and late strength value under the cement solidification sludge construction environment based on the strength testing value under the early high-temperature condition. The cement solidification strength ultra-early prediction method, and belongs to the foundation treatment and sludge solidification disclosed by the invention is simple in operation and high in accuracy, the middle and late period strength prediction can be performed at the early stage of the construction, the early quality control of the cement solidification sludge filling engineering can be realized, the optimal mixing proportion at the construction field can be adjusted as early as possible under the guidance, the problem that the strength sampling inspection is substandard after the construction is finished can be effectively avoided, the curing agent cost and the later solidification cost can be obviously reduced.

The invention provides a double cherry tissue culture propagation method. An economical efficient double cherry tissue culture propagation technology system is established according to the steps of explant selection, explant sterilization, tissue culture seedling induction, tissue culture seedling proliferation and tissue culture seedling rooting. An improved MS culture medium is adopted, the purposes of improving the double cherry transplantation survival rate, ensuring high propagation coefficient and short period and realizing rapid-propagation seedling culture without external environment influence can be achieved, the excellent characteristics of excellent varieties can be preserved, and the problem in short supply of double cherry is alleviated.

The invention discloses a vinylidene fluoride copolymer used as a solar back panel film and a preparation method of the vinylidene fluoride copolymer, belonging to the technical field of solar battery manufacturing in a solar photovoltaic industry. The vinylidene fluoride copolymer is characterized by being formed by polymerizing vinylidene fluoride with a vinylidene difluoride monomer, wherein the vinylidene difluoride monomer is one or more of tetrafluoroethylene, perfluorinated alkylvinylether, vinyl fluoride, chlorotrifluoroethylene and hexafluoropropylene. According to the invention, the vinylidene fluoride copolymer used as the solar back panel film is prepared by adopting a suspension copolymerization technology, namely, the copolymer is formed by introducing a proper amount of vinylidene difluoride monomers in the VDF (vinylidene fluoride) polymerization process, thus the regularity of a PVDF (polyvinylidene fluoride) molecular chain structure can be effectively regulated, crystallinity is reduced, and the bonding property of the vinylidene fluoride copolymer and EVA (ethylene-vinyl acetate) is increased, so as to meet the use requirement of the solar back panel film.

The invention discloses technology for producing low-caffeine catechin through a non-solvent method, which comprises the following steps of: mixing broken green tea and deionized water according to a solid-liquid ratio of 1:10-1:15 and ultrasonically extracting; standing and demixing the filtrate, separating by using a ceramic film, concentrating permeating liquid by using a nanofiltration membrane, separating and purifying by using a natural lignocellulose resin, and collecting and eluting the fraction; and performing concentrating and spray drying on the eluted fraction by using the nanofiltration membrane. The technology is easy and convenient to operate, low in cost and investment, and pollution-free, ensures green and safe products and is easy for industrialization. Compared with the conventional production technology, the technology does not need to use a lot of production reagents which pollute the environment and are harmful to a human body, has the advantages of high product purity and short production cycle, and meets the requirements on environment friendliness and safety.

The invention discloses a method for preparing environment-friendly gasified oil. The method comprises the following steps of: weighing each raw material component; placing a main material and a smell remover in additives into a reaction container for stirring; placing an auxiliary material, and a heating agent, a smoke suppressor and an emulsification cosolvent in the additives into the reaction container for stirring; placing an accelerant, a combustion improver, a dispersion agent and a catalyst in the additives into the reaction container for stirring; mixing and stirring the mixed solution prepared by the steps 1 and 2 and adding the mixture into the mixed solution prepared by the step 3 for stirring; testing the pH value of the mixed solution and adding a proper amount of acidity and alkalinity regulator; adding a proper amount of anti-freezing agent; and discharging to prepare the environment-friendly gasified oil. The invention also provides the environment-friendly gasified oil which comprises 65 to 85 percent of main material, 20 to 30 percent of auxiliary material and 1 to 3 percent of additives. The method has the advantages of simplicity, stable performance of a synthesized liquid fuel, combustion flame temperature of 1,100 DEG C, fuel heat value of 8,500KJ / kg, low fuel combustion lower limit value, complete combustion, convenient and safe use and broad application.

The invention relates to the field of gene engineering, in particular to an AP2 / ERF family IiAP2 / ERF049 transcription factor related to the content of a lignan compound in isatis indigotica fort, a nucleotide sequence for coding the transcription factor and an application of the transcription factor to increasing the content of lariciresinol in the isatis indigotica fort. An overexpression carrier of the IiAP2 / ERF049 is built, the isatis indigotica fort is subjected to genetic transformation through the pivotal transcription factor IiAP2 / ERF049, a bottleneck of lariciresinol synthesis is broken, and a high-yield isatis-indigotica-fort hairy-root strain is obtained; efficient regulating and controlling target points are provided for increasing the yield of the lariciresinol, and the application has enormous application prospects in the aspects that the content of the lariciresinol is increased, supplying shortage of the lariciresinol is relieved, the cost in traditional Chinese medicine extracting is reduced, pollution is reduced, and an excellent isatis-indigotica-fort strain is cultivated.

The invention discloses a club fungus cultivating method and a product thereof. The club fungus cultivating method comprises the steps that basal cell division is promoted while auricularia polytricha sporocarp development is interrupted by adjusting and controlling temperature and light intensity and cooperating with proper high-concentration CO2, top end cells of auricularia polytricha bases are simulated to continue to divide and growth upwards when normal cell division in auricularia polytricha basal bodies is up to a certain degree, so that the auricularia polytricha bases undergo the expanding, growing and proliferating process and bifurcate from the base portions, the middle-upper portions bifurcate for multiple times to form clusters, the top ends form finger-shaped cluster sets, finally coral grape vine shapes are formed, and the appearance, taste and nutritive value of club fungi are superior to those of club fungi of auricularia polytricha.

The invention discloses a method for compressing and densifying fast-growing cunninghamia lanceolata, which relates to the technical field of wood processing treatment and comprises the following steps of: (1) processing cunninghamia lanceolata wood; (2) preparing a cunninghamia lanceolata compression and densification pretreatment pre-solution; (3) carrying out compression and densification pretreatment on cunninghamia lanceolata; (4) balancing the moisture content of the wood before pressing; (5) compressing and densifying the cunninghamia lanceolata wood; and (6) carrying out later-stage thermal fixation. The cunninghamia lanceolata compression and densification method provided by the invention is simple in process and equipment, short in required time and relatively low in production cost. The density, the hardness and the elasticity modulus of the obtained compressed and densified cedarwood are increased compared with those of bare cunninghamia lanceolata and compressed and densified cunninghamia lanceolata which is not pretreated, and the moisture absorption recovery rate and the water absorption recovery rate are small.

The invention discloses a Chinese red pine seed storing method which comprises the following steps: packaging fresh Chinese red pine cones in a ventilating snakeskin bag, keeping the snakeskin bag opened or stacking in a drying room and naturally drying in the shade; at the time of seeding and raising seedling, removing epicarp scale of the cones dried in the shade with a knife; spreading and sunning the cones with epicarp removed, overturning for 1-3 times every day, and recovering the seeds in time when the cones crack after 1-3 days. According to the invention, the Chinese red pine cones and seeds are simultaneously stored, and the seeds are taken out from the cones at the time of seeding and raising seedling; and because the stored seeds are in a sealed and stable environment wrapped by scales, the seed quality is ensured, and the germination ratio of the seeds reaches 85% after being stored for 270 days, is slightly superior to that of the seeds stored in 4 DEG C refrigerator, and obviously superior to that of seeds stored at room temperature. The method is low in cost, easy and simple to operate and high in seed germination ratio, effectively solves the problem that the basic-level production department has difficulty in seed storage, improves the seeding quality, and alleviates the situation that the demand on high-quality seeds of Chinese red pine exceeds supply.

The invention discloses a water valve of a water tank. The water valve comprises a valve cover (4), a valve casing (5), a spring (6), a post rod (7) and a float ball (8), wherein, the valve cover (4) is connected with the valve casing (5) in a locating manner by a seal thread; the valve casing (5) is in slide fit with the post rod (7); and the post rod (7) is fastened with the float ball (8). The water valve is characterized in that the valve casing (5) is provided with a seal internal thread, a drain hole and a locating hole; the valve cover (4) is equipped with a hole in which a water inlet pipe (3) is arranged, a concave spherical surface (401) and an external thread; the post rod (7) is equipped with a convex spherical surface (701), a groove in which the spring (6) is arranged, and a round pin; and the float ball (8) is a hollow sphere with a connecting hole. In the invention, after the spring (6) is installed, the post rod does not move back to drain water off in the case of low water pressure by means of an elastic force; in the case of high water pressure, water flow washes away the post rod (7) so that water is filled into the water tank (1), and then the float ball (8) pushes back the post rod (7) so as to stop filling water after sufficient water is filled; and in the case of low water pressure, the spring (6) props against the post rod (7) so as to stop filling water.

The invention discloses a rectification tower of a 1,4-butanediol raffinate recovery system, and belongs to the technical field of chemical product rectification equipment. The rectification tower comprises a tower body, multiple stages of filling sections, an overhead gas outlet, a reflux inlet, a feed inlet, a reboiler return port, a tower bottom discharge outlet, and a reboiler communication port. A groove-type liquid distributor is arranged at the top of a first filling material section of the multistage filling material section unit. A collection tank-type liquid distributor is arranged between each two of the multiple stages of filling section. The rectification tower of a 1,4-butanediol raffinate recovery system has a recovery rate reaching above 90%, alleviates the situation of short supply of 1,4-butanediol on the domestic market, solves the problem of foreign market foreclosure, and greatly improves a resource utilization rate.

The invention provides a sodium alga acid edible sausage casing and a preparing method of the sodium alga acid edible sausage casing. The sodium alga acid edible sausage casing comprises, by weight, 0.5%-5% of sodium alga acid, 1.03%-16% of plasticizer, 0.21%-5% of fortifier and the balance water. The invention further discloses the preparing method of the sodium alga acid edible sausage casing. Compared with a natural sausage casing, the prepared edible sausage casing has the advantages of being high in strength, good in toughness and the like and compared with a manmade sausage casing, the prepared edible sausage casing has the advantages of being wide in source, low in cost, natural, healthy and the like.