40results about How to "Comply with circular economy requirements" patented technology

A decalcification technique of high-calcium old brine in a salt field includes the following steps: (1), dissolving mirabilite; (2), evenly mixing mirabilite mother liquid obtained in the step (1) with the high-calcium old brine in the salt field according to a molar ratio of Ca2+ to SO42- being 1: (1-1.2) for 1-24 hours to obtain slurry; (3), filtering; (4) washing and drying; (5), returning the decalcified old brine obtained in the step (3) to the sodium chloride salt field and continuing to evaporate the old brine. The decalcification technique has the advantages that sodium sulfate resources of a salt lake or nearby places are fully used for reacting with calcium sources in the high-calcium old brine to achieve decalcification of the old brine; technological process is simple and cost is low; the technique can be implemented directly in resource locations, circular brine mixing of high-concentration magnesium chloride brine after decalcification of the high-calcium old brine can be achieved, gypsum products can be produced, sodium sulfate minerals can be digested and local environment problems of the salt lake can be relieved.

The invention discloses a method for converting metal magnesium smelting and reducing slag into a desulphurizer for a coal-fired boiler. The system mainly comprises a drum-type air-water cooled crusher, an airtight water cooled buried scraper conveyor, an airtight vibrating screen classifier, an airtight bucket elevator, a magnesium slag powder storehouse, a bag-type dust collector, a draught fan and the like, and a pipeline connecting system. The waste slag by smelting the metal magnesium is treated to become the desulphurizer used by a circulating fluidized bed boiler, and the recovery and reuse of the waste are realized. The process method has the advantages of economy, energy conservation and emission reduction: a metal magnesium smelting unit converts the wastes into commodities, and the air pollution and soil pollution are removed and the residual-heat utilization is realized. In addition, the cheap desulphurizer can be provided for fluidized bed boilers in electric power plants. The method belongs to the field of treatment for solid wastes and is applied to the waste residue treatment and utilization of the metal magnesium smelting unit by the thermal reduction method.

The invention relates to a method for preparing a composite thermal insulation and energy-saving lightweight concrete wallboard. slurry, prepare steel skeleton, prepare air-entrained concrete core board and finally can prepare wallboard. It has a good building energy-saving effect and meets the requirements of circular economy. The prepared wallboard has a built-in steel skeleton, has good sound insulation performance and high flexural strength, and has good nailing and hanging performance. The calcium silicate board veneer is light. High-quality wall panels fully meet the requirements of wall functions, and create favorable conditions for environmental protection, energy saving, waste utilization, and circular economy. It is the best product for wall material reform at present. Therefore, it has good development prospects.

The invention discloses a carbide slurry fly ash fiber-reinforced architectural flat plate and a manufacturing method thereof. The carbide slurry fly ash fiber-reinforced architectural flat plate comprises the components in percentage by weight as follows: 36 to 45 percent of carbide slurry, 42 to 48 percent of fly ash, 6 to 8 percent of cement, 5 to 8 percent of quartz sand, 6.5 to 9 percent of cellulose fiber and 1 percent of poly-acetamide. The manufacturing method of the carbide slurry fly ash fiber-reinforced architectural flat plate comprises the following steps: step I, fiber refinement; step II, material feeding and pulping according to a formula; III, pulp storage, pulp discharge, pick-up and forming; step IV, processing forming; and step V, coating and packaging. The invention has the advantages that by utilizing local industrial waste namely the carbide slurry and the fly ash as main raw materials and utilizing the cellulose fiber as a reinforcing material, the architectural flat plate which has a shrinkage deformation coefficient larger than that of an ordinary calcium silicate plate, and better fireproof performance is produced; the radioactivity measured value of the architectural flat plate is 10 to 20 percent of the minimum value allowed by a national regulation, so that the architectural flat plate belongs to green environmentally-friendly products; and not only the production process satisfies the requirement of circular economy, but products are plates for the fields of wall bodies, ceilings and architectural acoustics, which satisfy the requirements of componentization, assembly and dry work for architectural products, so that the architectural flat plate belongs to high-level architectural material products in the architectural products.

The invention discloses a deodorant based on resource utilization. The deodorant is screenings of glass anti-mildew insulation powder with the particle size ranging from 60 mu m to 120 mu m. The deodorant has a good deodorant effect, can remove odors at any time like a common deodorant, requires no extra resource consumption and meets the requirement of cyclic economy.

The invention relates to a device and a process method for forcedly aging a motor vehicle tail gas purifying and catalyzing material. The process comprises: loading the motor vehicle tail gas purifying and catalyzing material into an aging reaction tube and heating the material; introducing an aged gas into a bed layer of a reactor catalyzing material for aging treatment for 5 to 20 hours at a temperature of between 400 to 1,300 DEG C; and taking out the aged catalyzing material, and testing the material. The aging device mainly comprises a gas path, an aging tube reactor and a temperature control component. The device and the method are used for carrying out service life investigation and activity screening on the motor vehicle tail gas purifying and catalyzing material containing at least one class of oxide corresponding to elements like cerium, zirconium, aluminum, barium and the like. The device and the method have the advantages of real and reliable test result, simple operation process, small operation risk, good repeatability and easy realization of engineering scale-up. Highly toxic waste gas, waste liquid and waste residue are not discharged in the process of processing so the invention meets the circular economy requirements.

The invention relates to a method for preparing and extracting high-purity allocryptopine. An initial extract is obtained by making use of ethanol to carry out refluxing, extraction and drying by distillation on natural papaveraceae plant; most alkaloid of the initial extract is subsided out in acidity alcohol, the pH value of the solution is adjusted to 7.5-8.5 by sig water and then to 9.5-10.5 after filtration, filtration is carried out again and filter residue is a crude extract; the crude extract is carried out refluxing treatment by ethyl acetate and methanol and filtered; the high-content allocryptopine monomer is obtained after the recrystallization of residue obtained from the filtrate by decompression and drying by distillation in methanol or chloroform-methanol or anhydrous alcohol. The method expands the scale of raw materials for extracting allocryptopine and provides a new economic and feasible way for preparing high-purity allocryptopine monomer. The method applies raw materials which are available, has simple and easy separation and purification technique and relatively low cost and is suitable for mass production.

The invention provides a new method for preparing 2-deoxy-D-glucose, which belongs to the technical field of resources, medicine and chemical industry. It solves the problems of complex production process and high production cost in the existing 2-deoxy-D-glucose preparation method. The new method for preparing 2-deoxy-D-glucose comprises the following steps: 1, the preparation of 2-deoxy-2-benzylidene amino-D-glucose; 2, 2-deoxy-2-benzylidene amino- Preparation of 3,4,5,6-tetra-O-acetyl-D-glucose; Preparation of 3,2-deoxy-2-amino-3,4,5,6-tetra-O-acetyl-D-glucose Preparation; Preparation of 4, 2-deoxy-2-chloro-3,4,5,6-tetra-O-acetyl-D-glucose; 5, 2-Deoxy-3,4,5,6-tetra-O - Preparation of acetyl-D-glucose; 6. Preparation of 2-deoxy-D-glucose. The preparation method of the invention has wide sources of raw materials, low price, easy operation and great economic, social and environmental benefits.