36results about How to "Alleviate the current situation of resource shortage" patented technology

The invention relates to the field of fry rearing, in particular to a brachymystax lenok fry high-density rearing method. The brachymystax lenok fry high-density rearing method comprises the steps of controlling the fry rearing density, controlling the water flow, controlling types of baits, controlling the feeding quantity and controlling the illumination intensity. According to the rearing method disclosed by the invention, high-density rearing can be carried out on the premise of controlling the survival rate of fries, rearing cost of brachymystax lenok is reduced, the output is improved, manual rearing of brachymystax lenok is implemented, and the current situation of shortage of resources of brachymystax lenok in China can be relieved.

The invention discloses a preparation method of a functional amino acid enzyme. The method comprises the following steps: crushing an animal-derived protein raw material, and using acid protease and lipase for treatment; then carrying out aerobic fermentation by using bacillus subtilis, bacillus licheniformis and saccharomyces cerevisiae, carrying out anaerobic fermentation by using enterococcus faecalis, lactobacillus plantarum, lactobacillus acidophilus and streptococcus thermophilus after the aerobic fermentation is finished, and converting into a functional amino acid enzyme for feed or anagricultural functional amino acid enzyme fertilizer after microbial fermentation; the invention further discloses characteristics and application of the functional amino acid enzyme. According to the method, harmless treatment and resource utilization can be carried out on animals died of illness, the defects in the prior art are overcome, and the method has the advantages of being environmentally friendly, low in treatment cost, high in product additional value and wide in product application range and is a technology worthy of being popularized in the industry.

The invention provides a production method for producing autoclaved aerated blocks by using raw electrolytic manganese slag and raw steel slag tailing mud. The autoclaved aerated blocks are produced from 30-50% of the electrolytic manganese slag, 10-30% of the steel slag tailing mud, 10-20% of water-quenched blast furnace slag, 5-15% of Portland cement, 5-10% of quicklime, 0.1-0.8% of an aluminumpowder paste (admixture) according to the following sequential steps: S1, performing mixed grinding; S2, proportioning; S3, slurrying; S4, stirring and pouring; S5, heating and standing; S6, cutting;S7, autoclaving; S8, aging. The aerated blocks produced by the production method can meet block standards of A1.5-A5.0, B09 and B10 classes in JC1062-2007 foam concrete block standards.

The invention belongs to the field of solid waste resource utilization, and particularly provides a system and process for co-production of quick lime and sulfur through gypsum reduction, oxidation and cyclic calcination. The method comprises the following steps that gypsum is subjected to reduction calcination and then subjected to oxidation calcination, the reaction temperature of reduction calcination and oxidation calcination is controlled to be 700-1200 DEG C, and the gas-air coefficient is the excess air coefficient; sulfur dioxide in the flue gas separated in the reduction calcining process is subjected to carbon thermal reduction to generate sulfur; flue gas generated in the oxidation calcining process carries an oxidation calcining material to return to the reduction calcining process for cyclic calcining until the mass fraction of collected solid materials meets the requirements of quicklime products, the problems that in the prior art, quick lime prepared by taking gypsum asa raw material contains calcium sulfide, the quality of the quick lime is greatly reduced, a sulfur product cannot be co-produced in the process of preparing the quick lime by taking gypsum as a rawmaterial, and the environment is polluted are solved.

The invention relates to a waste polyester-cotton textile degrading and recycling process and system. According to the waste polyester-cotton textile degrading and recycling process, high-concentration phosphoric acid and cotton fibers in polyester-cotton are reacted at first, water-soluble cellulose phosphate ester is generated, and primary separation of polyester and the cotton fibers is completed; then the cotton fibers are separated out through hydrolysis, and pure cotton fibers are obtained; and alkali liquor is added into reaction liquid subjected to acidolysis for alkaline hydrolysis, water-soluble sodium terephthalate is generated through sodium hydroxide and the polyester and further hydrolyzed to generate terephthalic acid, the obtained terephthalic acid is subjected to direct esterification through ethanediol, polyethylene glycol terephthalate, namely PET is obtained, and subsequent cyclic utilization is facilitated. Through the waste polyester-cotton textile degrading and recycling system, the waste polyester-cotton textile degrading and recycling process can be completely efficiently, and the cotton fibers and the polyethylene glycol terephthalate which are high in purity and facilitate subsequent cyclic utilization are obtained.

The invention relates to a device and method for joint production of iron, sulfur and gas in the smelting process of pyrite, and belongs to the field of metal smelting. The method comprises the following steps of calcining the pyrite at the bottom part of the interior of a calcining-gasifying reaction tower, enabling pulverized coal and fly ash to generate gasifying reaction at the middle upper part, enabling the sulfur-containing flue gas to carry the high-valence oxide of iron produced by calcining at the tower bottom to the middle upper part of the reaction tower, mixing with the gas and coke produced by gasifying, and generating oxidation and reduction reaction; separating the product by an iron-based high-temperature separator and a carbon-based high-temperature separator, and sendingback into an iron oxide reduction tower; performing secondary reduction reaction on the iron oxide in the iron oxide reduction tower, and producing reduction gas, so as to obtain iron slag; purifyingthe crude gas, so as to obtain the purified gas; enabling a sulfur condenser to condense and recycle the sulfur. The method has the advantages that the joint production of iron, sulfur and gas is realized in the smelting process of the pyrite, and the pyrite can be efficiently and cleanly utilized.

The invention relates to a system and a method for recovering calcium carbonate and sulfur by calcining gypsum. The system comprises a coal gasification-calcination U-shaped furnace, a H2O-CO2 processor and a Klaus reactor. A coal gasification section on the right side of the coal gasification-calcination U-shaped furnace is respectively connected with a calcium-based material storage bin and a coal powder storage bin. A calcination section on the left side of the coal gasification-calcination U-shaped furnace is connected with a gypsum storage bin. The top end of the calcination section on the left side of the coal gasification-calcination U-shaped furnace is connected with a high-temperature separator. The bottom of the high-temperature separator is sequentially connected with a calciumsulfide-calcium oxide cooler, a H2O-CO2 processor and a calcium carbonate storage bin. The H2O-CO2 processor is also connected with the Klaus reactor. The Klaus reactor is sequentially connected witha sulfur recovery device and a sulfur storage bin. The sulfur recovery device is also connected with a flue gas purification system. The system and the method are used for preparing the sulfur and a byproduct, calcium carbonate powder, by using the industrial byproduct gypsum which is difficult to treat, and the byproduct calcium carbonate powder can replace limestone to be used as a desulfurization and denitrification agent for recycling and can also be used as a catalyst of a coal gasification process.

The invention discloses an improved structure of a vertical processing machine tool and aims to provide an improved structure which has relatively light weight and small volume, big processing space, simple manufacturing process, and low cost and can be independently disassembled and transpositionally assembled. The improved structure of the vertical processing machine tool comprises a pedestal, a machine body, a working platform, and a processing unit. An interlock frame style machine body composed by at least four guide rails is vertically fixed on the pedestal, and the upper part is provided with a stable frame. An X-direction kinematic pair, a Y-direction kinematic pair and the processing unit are arranged at the upper part of the machine body. The working platform is arranged on the machine body for moving in Z-direction. The routes of the guide rails in X, Y and Z directions are expanded to a maximum extent so as to obtain a larger processing space. The requirements for processing strength and precision are well guaranteed by adopting a reasonable structure and a lightweight guide rail pair with a cylndrical surface. The improved structure of the vertical processing machine tool is suitable for various ordinary and numerically controlled metal-cutting machine tools such as drill machines, drilling and milling machines, milling machines, boring and milling machines, multi-function machine tools, and vertical machining centres, is suitable for wide application, and plays a great role in saving resource.

The invention discloses a kind of wood board for homemade container which is made up with leftover material and the manufacturing method. It comprises panel, bottom board, lengthways long core board,transverse double printing core board and lengthways core board. The panel and bottom clamp the three kinds of core boards. On little pressed part, it uses low intensity core board which is made up of leftover material through rough hydraulic shaping or speed-up material which hasn't been used in engineering. Pastes high intensity frigid zone hardwood on the core board.

The invention discloses a system and a process for decomposing calcium sulfate and recovering sulfur and calcium oxide through carbon-sulfur cooperation. The process comprises the steps as follows: calcium sulfate, a catalytic carbon material and sulfur are heated to the temperature of not lower than 800 DEG C, so that calcium sulfate is decomposed, decomposition smoke and calcium oxide at the temperature not lower than 700 DEG C are produced, the content of SO2 in the decomposition smoke is controlled to be not smaller than 5wt% through the addition amount of sulfur, a reduction carbon material is added to the decomposition smoke for a carbon heat reduction reaction, SO2 in the decomposition smoke produces elementary sulfur, reduction smoke produced after carbon reduction of the decomposition smoke not only contains elementary sulfur, but also contains the reduction carbon material not participating in the reduction reaction, one part of reduction carbon material not participating inthe reduction reaction is used as the catalytic carbon material, and one part of elementary sulfur is used as a sulfur material for catalyzing calcium sulfate decomposition. The problem that gypsum isdifficult to treat can be relieved, gypsum can be recycled, sulfur and calcium oxide can be recovered, and the current situation of shortage of sulfur resources can be relieved.

The invention relates to an integrated device and method for preparing sulfur through regeneration and reduction of active coke. Comprising a regeneration reduction furnace which is of a shell-and-tube structure and comprises a reaction inner tube and a combustion cavity on the outer side of the reaction inner tube, the reaction inner tube is vertically arranged, the top of the reaction inner tube is provided with a coke breeze feeding port, the bottom of the reaction inner tube is provided with a coke breeze discharging port, and one side of the lower portion of the reaction inner tube is provided with a gas outlet; a gas outlet of the reaction inner pipe is connected with an inlet of the gas-solid separator; the gas outlet of the gas-solid separator is connected with the inlet of the sulfur recovery device. The integration of regeneration reaction and reduction reaction is realized. The reaction time is short, the sulfur conversion rate is high, and the adsorption capacity of the regenerated active coke is large.

The invention relates to a method for improving enzymolysis resistance of casein and reducing sensitization, which is used for cross-linking China-hemp seed protein and casein through transglutaminase, and specifically comprises the following steps: (1) preparing a mixed solution of casein and China-hemp seed protein; (2) adding transglutaminase into the mixed solution of the casein and the hemp seed protein, and carrying out cross-linking reaction to obtain a cross-linked casein solution; and (3) placing the cross-linked casein solution in an environment of 3-5 DEG C, and terminating cross-linking. Compared with the prior art, the method has the advantages that the process steps are simple, the novel food resource, namely the hemp seed protein, is fully utilized, the casein is replaced by the hemp seed protein, the sensitization of the casein is further reduced, the enzymolysis resistance of the casein is improved, and the delivery effect of the casein on sensitive substances in the fields of food and pharmacy is improved.

The invention relates to a method for preparing biological gasoline from biomass, which comprises the following steps: biomass hydrolysis: hydrolyzing biomass in 0.1-10% dilute acid at 140-220 DEG C for 5-240 minutes to prepare levulinic acid; carrying out dehydration reaction on the levulinic acid at 130-180 DEG C for 60-180 minutes under the action of 0.1-5% liquid acid, acidic ionic liquid or molecular sieve to prepare angelica lactone; carrying out polymerization reaction on the angelica lactone at 60-160 DEG C for 1-180 minutes under the action of 0.1-5% inorganic alkali to prepare an angelica lactone polymer; and carrying out hydrogenation reaction on the angelica lactone polymer at 200-400 DEG C for 4-60 hours under the action of a 0.1-5% catalyst to obtain the final product biological gasoline. The method can greatly enhance the carbon utilization ratio, reduce the carbon dioxide emission, and lower the dependence on petroleum and other nonrenewable resources. The method has the advantages of short technical process and mild reaction conditions; and the product has the advantages of high yield and high quality.