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201results about How to "Improve recycling rate" patented technology

Converter vanadium extraction process adopting top blowing oxygen lance to blow cooling agents

The invention relates to a converter vanadium extraction process adopting a top blowing oxygen lance to blow cooling agents, belongs to the technical field of ferrous metallurgy, and is used for solving the problems that the temperature of a molten pool is difficult to control in the vanadium extraction course, the dynamic condition is poor and the like and increasing the oxidation conversion rate of vanadium and the quality of vanadium slag. The converter vanadium extraction process comprises a powder supply system and an oxygen supply system; and the cooling agents are blown through using a supersonic oxygen jet of the top blowing oxygen lance, and the aims of controlling the temperature of the molten pool in the vanadium extraction course and improving the stirring ability of the molten pool are achieved by utilizing a principle that powder rapidly reacts with hot iron to absorb heat, thereby achieving the technical effect of efficient vanadium extraction. The cooling agents enters the oxygen lance via a powder supply pipe in the powder blowing process; an outlet of the powder supply pipe can be positioned between the upper part of a lance body and an Raoult outlet of a blowing head; and the inner diameter of the powder supply pipeline is in the range of 15 to 180mm, the powder blowing flow rate is in the range of 20 to 800kg/min, the carrier gas flow rate is in the range of 100 to 4000Nm3/h, and the carrier gas pressure is in the range of 0.5 to 1.6Mpa. The converter vanadium extraction process is suitable for vanadium extraction converters of 200 to 300t; and by adopting the converter vanadium extraction process, the semi-steel vanadium content can be reduced to below 0.03 percent, and the quality of vanadium slag (V2O5) is increased by more than 1 percent, so that the recovery rate of vanadium resources is increased.
Owner:UNIV OF SCI & TECH BEIJING

Production method of earthworm cast-based ecological organic fertilizer

The invention discloses a production method of an earthworm cast-based ecological organic fertilizer. The production method comprises the following steps of: selecting organic solid waste with carbon-nitrogen ratio of 1:23-28 as a matrix, wherein the water content is 52-68 percent and the pH value is 6-7; inoculating 1-2 kg of Daping No. 2 earthworms into the matrix every square meter at 15-25 DEG C; separating continuously produced earthworm cast to serve as a raw material for producing the organic fertilizer; adding a rotten organic fertilizer which is inoculated with antagonistic bacteria into the earthworm cast; after performing amplification culture on the beneficial microorganisms therein; adding an insect repellent plant material therein according to the amount which is 0.5-4.5 percent of the weight of the materials; uniformly mixing to obtain the ecological organic fertilizer. The production method has the characteristics of rational design, convenience in operation, large-scale application and environmental friendliness; the prepared organic fertilizer has a good application effect and high applicability; and the produced organic fertilizer integrates the characteristics of a microbial fertilizer, an organic fertilizer and an inorganic fertilizer and has the characteristics of multiple functions, multiple effects and full nutrition.
Owner:宋忠俭

Powder spraying device and method for efficient vanadium extracting process of converter

The invention discloses a powder spraying device and a powder spraying method for an efficient vanadium extracting process of a converter, belongs to the technical field of metallurgy, and aims to solve the technical problems of poor dynamical condition, low oxidation conversion rate of vanadium and the like in the vanadium extracting process of the converter. The device comprises a powder spraying tank system, a PLC (programmable logic controller) control system, a gas adjusting valve set and a powder spraying gun. The powder spraying rate is accurately and continuously controlled by adjusting the frequency of a rotary feeding tray motor, the powder spraying gun has a double-sleeve structure, carrier gas powder spraying is adopted in a central pipe, meanwhile, auxiliary blowing gas ensures continuous operation of the powder spraying process, and circular seam blowing protective gas protects the powder spraying gun. The powder spraying gun is arranged on the side or the bottom of the vanadium extracting converter, and protective sleeve bricks are embedded around the powder spraying gun. The device is suitable for the vanadium extracting converter of 10 to 200 tons, can spray 50 to 200kg / min iron concentrate powder in the vanadium extracting process of the converter, improve the dynamical and thermodynamic conditions of vanadium extraction of the converter, reduce the content of half steel vanadium to be less than 0.03 percent and improve the content of vanadium slag (V2O5) by 2 to 5 percent, meanwhile, is favorable for shortening the vanadium extracting smelting period of the converter, and realizes efficient vanadium extraction of the converter.
Owner:HEBEI IRON AND STEEL +1

Facility agricultural non-point source pollutant on-site intercepting and absorptive method

The invention belongs to the technical field of environment protection, and relates to a facility agricultural non-point source pollutant on-site intercepting and absorptive method. By the aid of a triple intercepting and absorptive method of source control, process blocking and intercepting and destination absorption and fixation of facility agricultural pollutants, non-point source pollution sources-flow-convergence processes and water-fertilizer key factors determining forming of non-point source pollution are subjected to process key point control, and on-site reduction of facility agricultural non-point source pollution is achieved by means of reducing consumption of nitrogen and phosphorus, increasing nitrogen and phosphorus absorption, preventing nitrogen and phosphorus loss and recycling nitrogen and phosphorus. By the method, nitrogenous fertilizer input of facility farmlands is decreased by 35%, phosphate fertilizer input is decreased by 22%, chemical pesticide input is decreased by 41.4%, agricultural waste recycling and harmless treatment utilization rate reaches 91.7%, treatment cycle is shorted by 46.2%, nitrogen is reduced on site by 38.45%, and phosphorus is reduced by 25.42%. The method can be widely applied to interception and control of facility agricultural non-point source pollutants.
Owner:INST OF AGRI ENVIRONMENT & RESOURCES YUNNAN ACAD OF AGRI SCI

Foundation pit supporting structure and construction method thereof

The invention relates to a foundation pit supporting structure and a construction method thereof. The foundation pit supporting structure comprises a first supporting plate, a second supporting plate,sliding rods, a limiting assembly and supporting assemblies. The moving direction of the sliding rod located on the first supporting plate is perpendicular to the second supporting plate. The movingdirection of the sliding rod located on the second supporting plate is perpendicular to the first supporting plate. Multiple first limiting grooves are formed in the first supporting plate. Multiple second limiting grooves are formed in the second supporting plate. Limiting plates are mounted on the sliding rods, and limiting holes are formed in the limiting plates. Limiting assemblies comprise limiting rods. Each supporting assembly comprises a supporting part and second sliding blocks, wherein one second sliding block is in sliding connection with the sliding rod located on the first supporting plate, and the other second sliding block is in sliding connection with the sliding rod located on the second supporting plate. The foundation pit supporting structure has the effect that the selfsupporting strength can be changed according to design requirements conveniently.
Owner:北京住总第一开发建设有限公司

Design construction method of flexible compound fabricated recoverable rectangular working well supporting structure

InactiveCN109056746AMeet the positioning and installation accuracy requirementsAdvanced technologyExcavationsStructure systemHigh polymer
The invention relates to a standardized design construction method of a flexible compound fabricated recoverable rectangular working well supporting structure. The method comprises the following stepsthat (1) construction of minisize supporting piles is carried out; (2) construction of pile top crown beams; (3) a rectangular working well is excavated, panels and waist beams are installed, and high polymers are poured to side walls for sealing; (4) excavation is carried out layer by layer sequentially in the vertical direction, and the step (3) is carried out repeatedly till the design depth is met, that is, construction of the rectangular working well supporting structure is completed accordingly; and (5) after the supporting structure fulfills the usage function, the supporting structurerecovery work can be carried out as the backfilling work is started. Through standardized design construction of the established supporting structure system, one supporting structure can meet the construction requirement of most rectangular working wells in a region, the advantages of safety, reliability, quick and convenient construction, advanced technologies, high recoverability, superior economic indicators and the like are achieved, and the application and development prospects are considerable.
Owner:南方工程检测修复技术研究院

Cooling liquid recovery device of numerical control machine tool

The invention relates to the technical field of machine tools, in particular to a cooling liquid recovery device of a numerical control machine tool. A cooling liquid filtering box is fixedly connected to a base through two supporting bases, a filtering plate sliding base is connected to the upper end of the cooling liquid filtering box in a sliding mode, a first-stage filtering assembly is slidably connected in the filter plate sliding base, a control assembly is rotationally connected to the upper end of the cooling liquid filtering box, and the control assembly is in meshed transmission connection with the filter plate sliding base; and a secondary filtering assembly is slidably connected to the middle end of the cooling liquid filtering tank, and a scrap iron cooling box is fixedly connected to the cooling liquid filtering tank. According to the device, a cooling liquid can be subjected to double filtration, the filtering effect is good, the cooling liquid can be discharged out forrecycling after cooling, so that an circulation use rate of the cooling liquid is improved, and a certain economic benefit is achieved; the first-stage filtering assembly can filtered out cutting scraps and solid particles in the cooling liquid and discharged into the scrap iron cooling box for cooling, and the high-temperature cutting scraps can be prevented from accidentally injuring workers.
Owner:广州通发智能装备股份有限公司

Device for treating biurea condensation sewage generated from preparation of ADC (Azodicarbonamide) foaming agent with urea method and use method of device

The invention discloses a device for treating biurea condensation sewage generated from preparation of an ADC (Azodicarbonamide) foaming agent with a urea method and a use method of the device, relates to a sewage treatment device and a use method thereof, and aims to solve the problem that COD (Chemical Oxygen Demand) in effluent of the biurea condensation sewage generated when the ADC foaming agent is prepared by using the urea method is hard to meet standards. The device consists of an evaporation crystallizer, a high-temperature salt bath decomposition and gas absorption system and a pressure hydrolysis-flash evaporation system. The use method disclosed by the invention comprises the following steps: feeding sewage into the evaporation crystallizer, performing cooling crystallization on concentrated liquid, feeding into an ammonia distillation tower for ammonia distillation, discharging the bottom liquid of the ammonia distillation tower into the pressure hydrolysis-flash evaporation system for decomposition treatment, and feeding salt generated from evaporation crystallization into the high-temperature salt bath decomposition and gas absorption system for purification treatment. By adopting the device and the use method, urea and hydrazine hydrate of the ADC condensation sewage can be recycled, sodium chloride can be purified, the water circulation utilization rate can be increased, and standards of indexes such as COD in the effluent can be met.
Owner:HARBIN ENG UNIV

Environment-friendly preparation method of plastic color master batch

The invention discloses an environment-friendly preparation method of a plastic color master batch. The preparation method is characterized in that an inorganic pigment is dissolved in a supercriticalfluid; then the supercritical mixed solution is mixed with a resin carrier; the supercritical mixed solution permeates into a plurality of hole structures of the resin carrier; the inorganic pigmentparticles are gradually deposited in the carrier through reduced pressure expansion; and finally, separating and drying are performed for obtaining the master batch. The preparation method provided bythe invention has the following advantages that no solvent is involved in the whole preparation process, and no harmful substance is discharged, so that the problem that industrial three wastes (waste gas, waste water and industrial residue) are difficult to treat is fundamentally solved, and the atmosphere and water resources are effectively protected; the natural utilization rate is high, and the recycling rate of carbon dioxide can reach 90% or more; surfactants such a dispersing agent, a detergent and the like are not needed in the preparation process; and the dyeing production efficiencyis high, the supercritical carbon dioxide fluid is low in viscosity, large in diffusion coefficient, and small in diffusion boundary layer, so that the dissolved monomolecular inorganic pigment can rapidly permeate into gaps of the carrier resin, the coloring rate is far larger than coloring rates of traditional systems, the production period is greatly shortened, and the production efficiency isimproved.
Owner:CHENDU NEW KELI CHEM SCI CO LTD

Process and system for resourcing and recycling fluorine-containing wastewater in photovoltaic industry

The invention provides a process for resourcing and recycling fluorine-containing wastewater in the photovoltaic industry. The process comprises the following steps: sorting and collecting concentrated acid wastewater, concentrated alkali wastewater, diluted acid wastewater and diluted alkali wastewater; adding sodium salt or potassium salt into the concentrated acid wastewater according to the concentration of fluorosilicate ions of the concentrated acid wastewater to perform crystallizing reaction to obtain fluosilicate, and adding calcium salt into the concentrated acid wastewater according to the fluorinion concentration of the concentrated acid wastewater to perform crystallizing reaction to obtain calcium fluoride; removing fluorine from the diluted alkali wastewater and diluted acid wastewater, feeding into a precipitation tank for precipitating treatment, performing chemical softening treatment, sequentially passing through a sand filter, an activated carbon filter, a resin softener and a reverse osmosis device to obtain produced water; crystallizing the concentrated acid wastewater, feeding system effluent and concentrated alkali wastewater into a reaction tank for fluorine removal treatment, feeding into the precipitation tank for precipitating treatment, and producing condensed water through an evaporator. Furthermore, the invention provides a system for resourcing and recycling the fluorine-containing wastewater in the photovoltaic industry.
Owner:CHINA ELECTRONICS INNOVATION ENVIRONMENTAL TECH CO LTD +1

Clearer production process and preparation system for junked tire

ActiveCN102765146ASolve recycling problemsFull stripping operation time shortenedPlastic recyclingAfter treatmentEngineering
The invention discloses a clearer production process and a preparation system for junked tire. The process mainly comprises the following steps: (1) collecting junked tires as raw materials; (2) weighing the raw materials, and automatically recording weight and dimension; (3) cleaning the raw materials by treating each tire by a low-pressure multi-direction water curtain; (4) cutting raw material: after treatment by the low-pressure multi-direction water curtain, selecting a processing efficiency mode, aligning with a set center line and sending the tires one by one into a semi-closed three unit cutting and processing intelligent system; and after the intelligent positioning, cutting each tire into three independent units through a PLC model; (5) pulverizing the raw materials; and (6) treating semi-finished products. According to the invention, each junked tire is directly cut into a ring tire and two sidewalls to form three units. The process has no requirement on tires, simplifies the key process steps and reduces machines; the process is different from prior art, in which a cover tire surface is first peeled off, and then an inner tube is treated; therefore, the process provided by the invention greatly improves the processing capacity and efficiency.
Owner:YATEFEI XIAMEN RUBBER SCI & TECH

Sand washing device

The application discloses a sand washing device, and belongs to the sand washing device field. The sand washing device is used for washing sand gravels, and comprises a sand washing machine and a cycle water pool used for processing wastewater generated by the sand washing machine, wherein the sand washing machine at least comprises a vibrating screen driven by a vibration generator, a mixing box is arranged at the bottom of the vibrating screen, the mixing box is connected with an entrance of a spiral separator through a sand pump and a pumping pipe, an exit of the spiral separator comprises a water outlet and a sand exit, the water outlet is connected with the cycle water pool through a sewage pipe, the sand exit of the spiral separator is located above the vibration screen, a high pressure clear water pipe is further arranged above the vibrating screen, the high pressure clear water pipe is connected with a water source through a high pressure water pump, the cycle water pool at least comprises an outer pool body, and a cleaning agent box is arranged on the outer pool body. Based on the above technical scheme, the sand washing device can improve cyclic utilization rate for the wastewater generated in the sand washing process, reduce water consumption and improve environmental protection effects on the premise of improving sand washing efficiency.
Owner:山东诚邦重工有限公司

Metering and on-line control method of cement production water footprint

The invention relates to a metering and on-line control method of a cement production water footprint and belongs to the field of water resource management of cement production. The metering and on-line control method is characterized in that the method is accomplished in a cement production water footprint metering and on-line control system controlled by a central control computer, and comprises the steps of measuring fresh water supplement quantity, circulating water quantity, discharged water quantity and effective water utilization quantity in real time under the control of the central control computer, accordingly working out comprehensive water consumption, water loss, and a circulating rate, an effective utilization rate and a loss rate of a water resource, sequentially judging whether the circulating rate of the water resource reaches a standard, whether the loss rate and the circulating rate of the water resource meet a set threshold simultaneously, and whether the effective utilization rate of the water resource is higher than 50%, and adopting failure removal measures corresponding to different stages till meeting a set object. The method facilitates boosting the green progress of the cement industry under the condition of saving the water resource, and facilitates saving the initial investment and operating cost.
Owner:BEIJING UNIV OF TECH

Single screw extruding production line

The invention discloses a single screw extruding production line, which comprises a hot melting furnace, a screw conveying housing, and a conveying heating cavity, a burning furnace frame is installedon the lower side of the hot melting furnace, first supporting feet are welded to the lower side of the burning furnace frame, a feeding pipe is installed in the middle of the lower side of the hot melting furnace, the lower end of the feeding pipe communicates with the upper part of one end of the screw conveying housing, the screw conveying housing is transversely installed on the lower side ofthe lower side of the burning furnace frame through a second supporting foot, one end of the screw conveying housing is connected with a conveying motor in a transmission mode, an extruding die is installed at one end of the screw conveying housing, an insulating layer is installed on the outer side of the lower part of the hot melting furnace, an insulating cavity is formed in the insulating layer, and a smoke conveying pipe is installed on one side of the upper end of the insulating layer. According to the single screw extruding production line, waste heat produced by burning of the hot melting furnace can be heated, the screw conveying housing prevents solidification of conveying materials, the energy utilization recovery rate is high, and the material extruding conveying effect is good.
Owner:GUANGZHOU POTOP EXPERIMENTAL ANALYSIS INSTR

Switching control valve for state of aircraft cargo compartment fire extinguishing system

The invention relates to a switching control valve for the state of an aircraft cargo compartment fire extinguishing system, and the switching control valve is particularly suitable for serving as a diversion element of extinguishing agents in an aircraft cargo compartment fire extinguishing pipeline. A flow control device comprises a valve body (1), a high-speed inlet (2) and a low-speed inlet (3), wherein a sliding type valve element (4), a valve cavity (5), a valve base (6) and an elastic force control switch (7) are arranged in the valve body, a slider (8) is arranged on the periphery of the sliding type valve element (4), a conical-angle face (9) is arranged at one end, close to the low-speed inlet (3), of the valve base (6), and a drying filtering cavity (10) and a throttling cavity (11) are formed in the valve cavity (5). The switching control valve meets different flow speed requirements and different requirements for extinguishing agents when fire happens to an aircraft, the using number of pipelines in the aircraft is reduced, the stability and the high efficiency of the fire extinguishing system of the aircraft are guaranteed, water, solid particles and other impurities in the extinguishing agents can be removed, and icing and blocking are avoided.
Owner:UNIV OF SCI & TECH OF CHINA
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