237results about How to "Obvious economic advantages" patented technology

The invention discloses a method for producing methanol synthesis gas and compressed natural gas by taking coke oven gas and coal as raw materials, and the main steps comprise that purification treatment, transformation treatment, desulfurizing decarburization, pressure swing absorption separation of methane and hydrogen and methane-rich gas compression are carried out to the coke oven gas to prepare the compressed natural gas; and coal gasification reaction, purification treatment, mixing with the hydrogen and fine desulfurization treatment are carried out to the coal to obtain the methanol synthesis gas. The method is based on the characteristics of more hydrogen and less carbon in the coke oven gas and more carbon and less hydrogen in the coal-made methanol feed gas, transforms CO to H2 and CO2 by the transformation treatment after the effective pretreatment to the coke oven gas, and then the H2 and CH4 are separated effectively by a PSA technology so as to be used as the raw materials with higher values, and therefore the method achieves the purpose of comprehensively utilizing the coke oven gas and the coal as the raw materials for producing the methanol synthesis gas and the compressed natural gas, adopts the effective energy in the coke oven gas and the coal to maximum, saves energy, reduces emission and improves the economic benefits.

The invention relates to a method for preparing boron-doped porous carbon spheres. The method comprises the following steps: 1) dissolving a saccharide carbon source and boric acid in water, and carrying out mixing and stirring by a certain ratio, so as to obtain a transparent solution; 2) adding a silicon-based pore former so as to form a boron-doped porous carbon sphere precursor solution; 3) subjecting the obtained precursor solution to a (aerosol assisted) spray drying process, so as to obtain solid-state boron-doped carbon sphere precursor particles; 4) subjecting the obtained solid particles to pyrolysis in an inert atmosphere, so as to obtain a mixture, of which a pore template SiO2 is embedded in boron-doped carbon spheres; 5) removing the silicon-based pore former from the mixture, and carrying out drying, thereby obtaining the boron-doped porous carbon spheres. According to the method, the problems of the existing boron-doped carbon material technologies that the raw material cost is high, the preparation process is miscellaneous, the boron doped amount is low, and large-scale industrial production is difficult are solved, and an alternate material, which is superior to commercial graphite, of negative poles of lithium-ion batteries is provided.

The invention relates to a soil repairing agent used for fixing heavy metal element in polluted soil, a preparation method and an application thereof. The soil repairing agent is a solid granular product, and is prepared by uniformly mixing a soil heavy metal chemical fixing agent ingredient (A), a soil heavy metal adsorbent ingredient (B) and a soil conditioner ingredient (C); according to the mass percentage, the soil heavy metal chemical fixing agent (A) content in the soil repairing agent composition is 20-80%, soil heavy metal adsorbent (B) content is 10-20%, and soil conditioner (C) content is 10-60%. The soil repairing agent can be directly and mutually mixed with the soil polluted by the heavy metal element and then is placed, or the soil repairing agent is dispersed or dissolved in water, then is uniformly stirred and mixed by the soil polluted by the heavy metal element and is placed, so that heavy metal element can be fixed, and heavy metal fixing rate can reach more than 95%. Transportable concentration of the heavy metal element in soil can be greately reduced, soil heavy metal pollution problem can be effectively solved, and polluted soil can be treated and restored finally.

A process for preparing activated carbon by co-pyrolysis of municipal sludge and agricultural waste comprises the steps of mixing the agricultural waste and the municipal sludge in a certain proportion to obtain a mixture; heating the mixture at a certain temperature under the condition of air isolation, keeping the temperature for a period of time, collecting a solid product, and cooling; and pulverizing the solid product to obtain the activated carbon product. In order to obtain an activated carbon with higher absorptive capacity, a certain amount of nitrate can be added into the mixture. Because the agricultural waste can make up the low heat value shortcoming of the sludge, while the municipal sludge can solve the problems with the agricultural waste that the pyrolysis solid product is easy to flow away and difficult to store, the inventive process can not only solve the high energy consumption and high cost problems of the prior sludge incineration, pyrolysis and other heat treatment methods, but also can be used for environmental treatment to save energy and reduce emission.

The invention relates to metal halide acid radical ion liquid for catalyzing acetylene hydrochlorination as well as an application method thereof. The metal halide acid radical ion liquid takes one ofalkyl-containing amine hydrogen halide, alkyl monosubstituted pyrrolidone hydrogen halide and pyridine hydrogen halide as a cationic source material and takes one of halide of zinc, copper, iron andtin as an anionic source material, wherein the molar ratio of the cationic source material to the anionic source material is 1:(0.3-3.0). In a bubbling reactor, the metal halide acid radical ion liquid serves as a catalyst, the reaction raw material gas acetylene and hydrogen chloride are mixed, the mixture is introduced into the metal halide acid radical ion liquid to perform reaction, the reaction temperature is 120 to 200 DEG C, the volume velocity ratio of the acetylene to the hydrogen chloride is 1:(1.0-1.6), the volumetric space velocity of the acetylene is 10 to 100 h<-1>, and under thecondition of not using noble metal, the highest conversion rate of the acetylene can reach to above 90 percent and the selectivity of chloroethylene is still more than 99 percent.

The invention belongs to the technical field of microorganism fermentation engineering and relates to a method for preparing nattokinase through solid-state fermentation. The method includes: respectively preparing a bevel culture medium, a seed solution culture medium and a fermentation culture medium; inoculating bacillus natto onto the bevel culture medium for culture to obtain activated bacillus natto, picking and placing 1-2 rings into the seed solution culture medium for oscillation culture to serve as a fermentation seed solution; sterilizing and then naturally cooling the fermentation culture medium, spraying the fermentation seed solution into the fermentation culture medium, adding water, and stirring well; paving a thin layer in a beaker, using gauze to seal, sequentially performing fermentation and after-ripening for 24 h, and adding normal saline; performing extraction and centrifuging to obtain supernate rich in nattokinase. The method is simple in process and convenient to operate, raw materials are easy to get and low in cost, and nattokinase prepared by the method is high in activity and has obvious economic benefit.

The invention discloses a method for separating and enriching lithium from magnesium lithium. The method includes: diluting and filtering salt brine to obtain nanofiltration raw water; putting the nanofiltration raw water into a first nanofiltration separation device for magnesium and lithium separation to obtain first nanofiltration concentrated water and first nanofiltration fresh water; puttingthe first nanofiltration fresh water into a reverse osmosis device for first concentration to obtain reverse osmosis concentrated water and second nanofiltration fresh water; putting the second nanofiltration fresh water into an electrodialysis device for secondary concentration to obtain electrodialysis concentrated water and electrodialysis fresh water, wherein the electrodialysis concentratedwater is a solution enriched with lithium ions. In the method, four membrane separation technologies of ultrafiltration, nanofiltration, reverse osmosis and electrodialysis are coupled in a certain order, and high efficiency separation and enrichment of lithium in the salt brine can be achieved by making full use of the advantages of the various membrane separation technologies.

The invention discloses a liquid accelerator and a preparation method thereof. The liquid accelerator is prepared from the following raw materials: a solution containing metaaluminate, aluminum sulfate, an inorganic acid solution, a complexing stabilizer, water, an optional anti-settling agent and an optional acidity neutralizer. The liquid low-alkali accelerator provided by the invention has theadvantages of rapid cement setting and hardening, rapid development of early strength of sprayed concrete, basically no loss of later strength and the like at a relatively low mixing amount, has widecement adaptability, and can still provide excellent rapid hardening and early strength properties for cement with low C3A content; the liquid accelerator has the advantages of no (low) corrosion, stable long-term storage performance, simple production process, easily controlled conditions, good economic benefit and wide application prospect.

The invention discloses a double-layer composite tube and a manufacturing method thereof. The double-layer composite tube and the manufacturing method aim to solve the technical problems that black pigment is added into traditional HDPE tubes, accordingly inner walls are not smooth, water scale is prone to being generated, bacteria grow, and secondary pollution of water is caused. The double-layer composite tube comprises an inner layer and an outer layer, the inner layer is made of ultrahigh molecular weight polyethylene and ethylene-vinyl alcohol copolymers or low-density polyethylene, and the outer layer is made of high-density polyethylene, ethylene-vinyl alcohol copolymers and special melanin particles C of PE. The method includes the following steps of material proportioning and dehumidifying, material plastifying, material forming, vacuum sizing and spraying and cooling. The double-layer composite tube has the advantages of being good in toughness and flexibility, high in chemical stability, good in corrosion resistance, good in sealing performance, large in distribution power, long in service life, high in low temperature resistance, hygienic, free of toxin and the like. The manufacturing method is simple, easy to operate and capable of achieving integral production of the double-layer composite tube.

The invention belongs to the technical field of energy conservation and environment friendliness, and relates to a free energy heat pump multiple-effect evaporation device which integrates a heat pump and a multiple-effect evaporation system, and a free energy heat pump multiple-effect evaporation process. The free energy heat pump multiple-effect evaporation device comprises the heat pump and the multiple-effect evaporation system which is integrated with the heat pump, wherein the heat pump is a medium- and high- temperature heat pump and is driven by a power supply system; the multiple-effect evaporation system comprises a vertical heat exchanger, a multiple-effect separator, a multiple-effect evaporator, a condenser, a heat exchanger, a delivery pump and a vacuum pump; and the medium-and high- temperature heat pump is communicated with the vertical heat exchanger and the condenser by a process pipeline. According to the free energy heat pump multiple-effect evaporation device and the free energy heat pump multiple-effect evaporation process, the running of the heat pump is adopted, and a cold source and a heat source are utilized organically, so that the aim of energy conservation can be fulfilled in the first-effect or second-effect operating state, operating energy consumption is reduced, and the simplification of equipment and the reduction of fixed investments are facilitated; and the free energy heat pump multiple-effect evaporation device can operate under the condition of lack of steam, the number of laying of steam pipelines can be reduced, a circulating cooling water system can be eliminated, and the waste heat discharge is reduced.

The invention relates to a control method of methyl alcohol flexible fuel vehicle and a system thereof. The system comprises a mixed fuel feeding system, an electronic control system and an engine, wherein, mixed fuel in a mixed fuel box comprises methyl alcohol and auxiliary fuel as the balance. A fuel recognition sensor is used for recognizing methyl alcohol content in fuel, corresponding data is transmitted to a data processing unit, the data processing unit analyzes the data and transmits a result to a central control unit, and the central control unit chooses a corresponding working module to adjust the corresponding control parameter, which ensures that the engine works at the optimum state. The invention mainly provides a control system of a methyl alcohol flexible fuel vehicle, which can add mixed fuel at any ratio to the mixed fuel box, needs no additives, has favorable starting performance and high dynamic property and discharges cleanly. The invention solves the technical problems that the fuel supply is out of control because of methyl alcohol-petrol mixed fuel delamination and vehicle starting performance is lowered in the prior art.

The invention relates to a method for preparing a covalent organic framework material by high-pressure homogenization. According to the synthesis method, at normal temperature and normal pressure, a common organic ligand is used as a raw material, water or an organic reagent is used as a solvent and a template agent, organic acid and inorganic acid are used as catalysts, and the corresponding COFs are obtained by homogenizing for a certain time through a high-pressure homogenizer. The method comprises the following steps of: adding 2, 4, 6-trihydroxy-1, 3, 5-benzenetricarboxaldehyde and p-phenylenediamine into a beaker, adding a proper amount of water and acetic acid, uniformly mixing, adding the mixture into a high-pressure homogenizer, and homogenizing for a certain time; and carrying out suction filtration on the product powder after the homogenizing reaction, recycling the filtrate, washing the product powder, and carrying out vacuum drying to obtain the covalent organic framework material HPH-Tp-Pa-1. Compared with other COFs preparation methods, the method provided by the invention has the advantages of continuous reaction, simple operation, low cost, high yield, environmental protection, energy saving, short reaction time and the like, has the potential of large-scale production, and can greatly promote the industrial production process of the COFs material.

The invention discloses dispersion nanometer reinforced 690 steel and a manufacturing method thereof. The manufacturing method comprises the steps of casting, heating, rolling and heat treatment. Thesteel comprises the following chemical components of, in percentage by mass, 0.02%-0.30% of C, 0.50-2.0% of Mn, 0.04-0.10% of Al, 0.002-0.013% of V, 0.01-0.3% of Nb, 0.005-0.3% of Ti, 0.001-0.010% ofN, and the balance Fe and inevitable impurities. The manufacturing method comprises the casting process and the TMCP process. By adjusting and optimizing the ratio of the alloy elements in the steel,the hardenability of the steel is improved by virtue of the trace alloy elements, and meanwhile carbon nitride nano-scale second-phase particles are formed; and meanwhile, the TMCP process is adopted,and the precipitation behavior of the micro-alloy elements as well as the precipitation amount, size and distribution of grains are controlled, so that the grains are refined, the strength and toughness of the steel are improved, and good formability and corrosion resistance are obtained.

The invention discloses a method for preparing vinyl chloride by taking an azacyclo-protonic acid ionic liquid as a medium through acetylene hydrochlorination. The method comprises the following steps: by taking the azacyclo-protonic acid ionic liquid which is synthesized by taking an azacycle compound as a raw material as the medium, mixing with a non-mercury catalyst to prepare a catalysis system, feeding the catalysis system into an acetylene hydrochlorination catalysis system firstly, and subsequently feeding acetylene and hydrogen chloride for reaction. The method adopts the ionic liquid as the reaction medium and the non-mercury metal compound as the catalyst, green and environment-friendly liquid phase reaction of acetylene hydrochlorination is achieved, and moreover the azacyclo-protonic acid ionic liquid is simple to prepare, economic and good in application prospect.

The invention relates to a support construction for an escalator or moving walkway, which comprises at least one framework element (2), wherein the framework element (2) is integrally constructed as an areal, non-profiled, cut plate. By virtue of the simple structure of the support construction without very much welding work, production time is substantially reduced.

The invention discloses a fan coil cold measuring method based on a flow-cold relation model. According to a fan coil structure, air supply volume and water supply flow, an inside-outside surface heat exchange coefficient is determined, a heat transfer coefficient is determined, dew temperature of a fan coil is set according to water supply temperature, a heat exchange efficiency coefficient and a contact coefficient which the fan coil can provide are determined, dry condition corresponding to wet condition of inlet air of the fan coil is determined, a heat exchange efficiency coefficient which the fan coil requires to treat the air is determined, dry condition corresponding to wet condition of outlet air of the fan coil is determined, and finally, cold supply volume of the cold supply tail of the fan coil after flow measurement is acquired according to the principle of energy conservation. The method has the advantages that measuring a temperature difference between supplied heat and supplied backwater is not required, the operating process is simpler accordingly, equipment failure rate is low, mounting is more convenient, energy saving is favored, reliability is high, and field measurement data shows that the method is higher in accuracy.

The invention relates to a formwork-stripping device with a corner formwork element (18) which can be connected on both sides to in each case a further formwork element (20), wherein a vertically movable pull rod (30) is provided in the corner formwork element for moving the further formwork elements relative to the corner formwork element. The pull rod has an engagement surface, which can be moved together with it, for a lever and/or a coupling region (32), which can be moved together with it, for a pull chain.