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64results about How to "Large stock" patented technology

Method for preparing fiber wallboard through wet process

The invention discloses a method for preparing a fiber wallboard through a wet process. The method comprises the following steps: 1) pulping: mixing non-wood type natural plant fiber pulp with gramineous plant pulp according to a dry weight ratio of 1:0-1.5 and adding water into the raw materials to dilute the pulp; 2) storing the pulp: placing the obtained mixture pulp into a pulp storage pond and adding water for dilution; 3) carrying out suction filter and formation: inputting the pulp obtained from the previous step into a die cavity for cold-pressing, dehydration and formation so as to obtain a wet blank; and 4) carrying out hot-pressing formation and drying; transferring the wet blank into a hot-pressing mould for hot pressing, removing water generated during the hot pressing, and obtaining the fiber wallboard. The fiber wallboard obtained by using the method has the characteristics of environment-friendliness and high strength.
Owner:陈集双

Biomass pool and automatic slagoff method for the same

The present invention relates to methane production apparatus field. The object of the present invention is to overcome the deficiency of existing technology and provides a reasonably designed, highly safe methane pool capable of removing crust of methane fluid and automatically discharging dregs and its usage method. The methane pool comprises ferment pool, feeding pool and output pool etc. The feeding pool is communicated with ferment pool through feeding tube and output tube. The feeding pool is not lower than output pool. The output pool bottom is in same level or slightly lower than ferment pool top whose feeding tube port is higher than that of output pipe. The ferment pool top is installed with gas exhaust port. The character of the present invention : (A+B+C)*1.08=V=(A+B+C)*0.92 . V represents the volume of ferment pool feeding tube port top to ferment pool top inside, A represents the volume of feeding pool, B represent the volume of output pool, C represents the feeding tube volume from ferment pool top to feeding pool bottom.
Owner:陈观梯 +2

Wet process of fabricating fiber wall panels

This invention discloses a wet process of fabrication of fiber wall panel, which includes the following steps: 1) slurry making: mix nontimber type natural plant fiber slurry with grass family slurry according to 1:0˜1.5 dry weight ratio, and add water to dilute this slurry; 2) slurry storage: pour the mixed slurry into slurry storage tank and add water for dilution; 3) suction straining and forming: pour slurry into mold cavity for cold pressing, dewatering, and forming, to yield wet blanks; 4) hot pressing, forming, and drying: move the wet blanks to the hot pressing mold for hot pressing and remove moisture generated during hot pressing, to yield fiber wall panel. Fiber wall panel made by this process features environment friendliness and high strength.
Owner:NANJING UNIV OF TECH DAFENG INST OF MARINE IND

Workpiece lifting and temporary storing device for production line

The invention discloses a workpiece lifting and temporary storing device for a production line, and belongs to the field of manufacturing equipment. The workpiece lifting and temporary storing device comprises lifting mechanisms arranged on the two sides of a workpiece transmission belt. Each lifting mechanism comprises a vertically and annularly arranged conveying belt, a plurality of supporting plates and a driver, wherein the driver drives the conveying belt to run, the multiple supporting plates are fixedly arranged on the outer side of the conveying belt from top to bottom at intervals and are roughly perpendicular to the conveying belt, and the supporting plate at the bottommost end is lower than the workpiece transmission belt. Goods shelf type temporary storage is adopted, and the temporary storage space is arranged upwards rather than in the same horizontal plane. The workpiece lifting and temporary storing device is compact in structure, small in occupied space and large in temporary storage amount. Influences on workpieces from other mechanisms and long-distance dragging of the workpieces on the transmission belt are avoided, the damage probability of the workpieces is reduced, and the workpieces are better protected.
Owner:ZHENJIANG JINGWEI ENG MACHINERY CO LTD

Method used for producing stone-like ceramic tiles from rare-earth tailing

The invention relates to a method used for producing stone-like ceramic tiles from rare-earth tailing. The method comprises conventional steps of powder preparing, pelleting, green brick pressing, drying, and kilning; a special slurry used for powder preparing comprises, by weight, 50 to 60% of rare-earth tailing, 20 to 25% of mud, 15 to 25% of low temperature sand, and 2 to 5% of aedelforsite, and in addition, 2 to 5% of bauxite, 0.2 to 0.3% of sodium silicate, 0.15 to 0.25% of a water reducing agent, and 0.05 to 0.1% of sodium tripolyphosphate are added; an obtained material is subjected to water ball milling at a ratio of ball milling stone: the material: water of 2:1:0.5. According to the method, a large amount of waste rare-earth tailing which are capable of polluting the environment and possesses excellent color development effect is used for producing stone-like large-particle ceramic tiles with abundant and unique effects; high quality is achieved, cost is low, and benefit is high; and the method is capable of reducing cost and optimizing the environment.
Owner:江西省石湾环球陶瓷有限公司

Manufacturing of decorative panels by inkjet

A method for manufacturing polymeric decorative panels includes, in order, the steps of a) inkjet printing an image on a first thermoplastic foil using an aqueous pigmented inkjet ink; b) applying a second thermoplastic foil on the inkjet printed image; c) heat pressing the first and second thermoplastic foils into a decorative laminate; and d) cutting the laminate into a decorative panel; wherein the aqueous pigmented inkjet ink contains polymeric resin particles and a self-dispersing colour pigment; and at least one of the first and second thermoplastic foils is a transparent foil.
Owner:UNILIN BVBA +1

Automatic book-selling machine

The invention relates to the technical field of book-selling machines and discloses an automatic book-selling machine. The automatic book-selling machine comprises a book-selling machine shell, a cylindrical overall structure is arranged in the book-selling machine shell and is divided into a plurality of layers book-storing mechanisms, and the book-storing mechanism of each layer is fixedly connected with the spindle through customized clamps; an overall internal motor is connectively meshed with a bevel gear on the spindle through a reducer via a bevel gear; the book-storing mechanism of each layer is provided with a book-discharging mechanism and is located behind a book groove capable of pushing out books through a book-discharging door plate, the book-discharging door plate is arranged on an upright on the front side, and a bearing platform on the lower portion is fixedly connected with a base. By the arrangement, utilization of space is increased, large stock is achieved, and storage of multiple kinds of books can be realized; the automatic book-selling machine is simple in structure and low in cost; people living in areas without libraries or far away from large-scale libraries can have books to read in the neighborhood and convenience in reading is achieved.
Owner:LUOYANG SHENGRUI INTELLIGENT ROBOT

Coating filtering device with alarm function

InactiveCN101579591ALarge filter areaLarge accumulation of impuritiesFiltration separationSteel platesSheet steel
The invention relates to a coating filtering device with alarm function. A cylindrical shell with an inner ring welded at the lower part of the inner wall is in threaded connection with a groove-shaped end cover, a filter screen support with a filter screen is welded on an underpan of the end cover, the filter screen is tightly compressed at the lower part of the inner ring of the shell by a circular elastomer mounted between the shell and the end cover, and a pressure sensor connected with an external alarm is mounted on the shell. The height of the shell and the diameter size of a cylinder are changed to adjust an effective filter area and suit the requirements for the production of coating steel plates; the internally arranged filter screen has a large surface area so that the upper part can still filter coatings even if impurities are piled at sides; and the pressure sensor drives the alarm to act when pressure increases so as to solve the problem in time, avoid a coating flying phenomenon because of the crack of the filter screen, overcome a flooding phenomenon generated in lacquer trays in the production process of the coating steel plates and improve the surface quality of coating plates.
Owner:ANGANG STEEL CO LTD

Manufacturing of decorative surfaces by inkjet

A method for manufacturing decorative surfaces includes the steps of a) inkjet printing an image on a first thermoplastic foil using a pigmented UV curable inkjet ink; b) applying a second thermoplastic foil on the inkjet printed image; and c) heat pressing the first and second thermoplastic foils into a decorative laminate; wherein the pigmented UV curable inkjet ink contains a polymerizable composition having 30 to 70 wt % of monofunctional polymerizable compounds and 30 to 70 wt % of polyfunctional polymerizable compounds, the weight percentage wt % is based on the total weight of the polymerizable composition; and at least one of the first and second thermoplastic foils is a transparent foil.
Owner:UNILIN BVBA +1

Reaction device and method for producing aluminum oxide

The invention relates to a reaction device and method for producing aluminum oxide, and particularly relates to a reaction device and method for producing aluminum oxide by taking pulverized fuel ash as a raw material. The reaction device comprises an ammonium sulfate pre-mixing measuring tank, a pulverized fuel ash storing-measuring bin, a combined spiral reactor, a material receiving tank and a gas collecting pipe, wherein the ammonium sulfate pre-mixing measuring tank and the pulverized fuel ash storing-measuring bin are arranged above the combined spiral reactor and are connected with an upmost inlet in the combined spiral reactor through connecting pipes at the bottom parts of the ammonium sulfate pre-mixing measuring tank and the pulverized fuel ash storing-measuring bin; and the material receiving tank is arranged below the combined spiral reactor and is connected with a lowest outlet in the combined spiral reactor through a connecting pipe at the top part of the material receiving tank. By the device and the method, the problems related to large-scaled production are solved; the device and the method have the characteristics of continuous production, high capacity of single-set device, reaction stability, high utilization rate or conversion rate of the raw material, and the like; the combined spiral reactor has the advantages of long service life, low production cost and the like; and the device and the method have a broad market prospect.
Owner:HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY

CNC machine tool plug-in tool magazine device

The invention discloses a CNC machine tool plug-in tool magazine device. The CNC machine tool plug-in tool magazine device comprises an installing seat, a cutting tool storing module and a tool switching mechanism. The installing seat is arranged on the CNC machine tool, the cutting tool storing module comprises a tool rotating table, the tool rotating table is provided with a plurality of tool claws used for clamping a tool handle, a slope is arranged on the installing seat, the cutting tool storing module is arranged on the slope, a plurality of spare cutting tools can be arranged on the cutting storing module, a set of empty tool claw is reserved, the tool switching mechanism can be used to switch the cutting tools in a self-preparation magazine tool of the CNC machine tool into the empty tool on the cutting tool storing module, the urgent and spare cutting tools can be used to switch the cutting tool from the cutting tool switching module to the self-preparation magazine tool of the CNC machine tool for the CNC machine tool to use, the storing amount of the CNC machine tool is increased, the processing efficiency of a complex workpiece is improved, the slope surface of the toolstoring module faces the self-preparation magazine tool of the CNC machine tool, thus the taking and putting of the cutting tool are more convenient, and the CNC machine tool plug-in tool magazine device is used in the field of machine tool structures.
Owner:KEYIZHAN INTELLIGENT EQUIP CO LTD +1

Multifunctional firewood gasifier

The invention provides a multifunctional firewood gasifier. The multifunctional firewood gasifier comprises a furnace body, an air blower, a smoke pipe and a water tank, wherein the air blower is arranged at the lower side of the furnace body and is communicated with the bottom part of the furnace body; the smoke pipe is arranged at the upper side of the furnace body; the lower end of the water tank is fixedly arranged at the upper side of the furnace body, and the water tank is arranged at the outer side of the smoke pipe in a covering way. According to the multifunctional firewood gasifier provided by the invention, through adding the air blower, the storage capacity of fresh air in the furnace body is increased, the combustion rate of firewood is increased, smoke which is generated by the firewood can enter the smoke pipe, secondary combustion can be carried out on the smoke in the smoke pipe, the heating rate of the firewood is increased, and discharged exhaust gas can be reduced; through adding the water tank at the outer side of the smoke pipe, heat generated through smoke combustion can be fully utilized; a salted meat roasting chamber is arranged on the smoke pipe, so that the roasting speed of preserved meat can be quickened, the roasting quality of the preserved meat can also be ensured, the utilization rate of the firewood can be effectively increased, and the environment can be protected.
Owner:侯淮瀚

Automatic conveying flower basket buffer storage station based on AGV trolley

The invention discloses an automatic conveying flower basket buffer storage station based on an AGV trolley. The automatic conveying flower basket buffer storage station comprises a waiting position,a working position and a buffer storage position which are in butting connection in sequence. A waiting position conveying line used for conveying trays is arranged in the waiting position. A workingposition conveying line used for conveying the trays is arranged in the working position. A buffer storage position conveying line used for conveying the trays is arranged in the buffer storage position. The trays are used for loading flower baskets. A tray locating mechanism used for locating the trays is arranged in the working position. On the waiting position conveying line, the trays are input through the AGV trolley, and on the buffer storage position conveying line, the trays are output through the AGV trolley. There is no need to wait in the feeding and discharging process of the flower baskets from the AGV trolley to a manipulator. The feeding and discharging waiting time of the flower baskets is shortened. The feeding and discharging speed of the flower baskets is increased. Theconveying efficiency of the flower baskets is improved.
Owner:HUNAN RED SUN PHOTOELECTRICITY SCI & TECH

Heavy metal ion adsorbent and application thereof

The invention relates to a heavy metal ion adsorbent and an application thereof. A preparation method of the heavy metal ion adsorbent comprises the following steps: taking main stem tobacco stalk as a raw material, and performing the steps of specific surface area increasing, immersion by a mixed solvent of low molecular alcohol and aqueous alkali, and solid-liquid separating in order to obtain the heavy metal ion adsorbent. The heavy metal ion adsorbent takes the main stem tobacco stalk as the raw material, and is obtained by the steps of specific surface area increasing as well as immersion by the mixed solvent of low molecular alcohol and aqueous alkali for modification; the tobacco stalk and the tobacco leaf are homologous, the composition of the tobacco stalk and that of the tobacco leaf are basically same, a non-tobacco component cannot be introduced into a tobacco extract, the tobacco stalk has a lot of the metal ion latent adsorption sites, so that the tobacco stalk can create conditions for heavy metal ions adsorption through modification, and the adsorption test proves that the adsorbent has good absorbing effect for heavy metal ions in the tobacco extract.
Owner:ZHENGZHOU TOBACCO RES INST OF CNTC

New energy tensioner and control method thereof

The invention discloses a new energy tensioner and a control method thereof.The new energy tensioner comprises a tensioner body and a connecting circuit, and the tensioner body is composed of an energy storage module, a first driving unit, a second driving unit, an auxiliary structure unit and an energy recovery module; the first driving unit comprises a frequency converter, a motor electrically connected with the frequency converter through a wire, a speed reducer connected with the motor and a tension wheel connected with the speed reducer, the energy recovery module comprises a first generator, a second generator and a transformer, and the transformer is electrically connected with the energy storage module through a wire; and the first generator and the second generator are electrically connected with the transformer through wires and convert external energy into available energy under the passive rotation of the tension wheel. Due to the fact that the tensioner is in the tension working condition for most of the time, and the motor generates electricity through the tension working condition of the tensioner, test data shows that compared with a traditional tensioner, energy can be saved by 30%-80%.
Owner:宜兴市博宇电力机械有限公司

Ice fog spraying device with anti-freezing function

The invention discloses an ice fog spraying device with an anti-freezing function, and belongs to the technical field of helicopter combined tests. The device comprises an air source system, a water supply system, a nozzle and a purging pipeline; the air source system includes an air source, an air supply adjusting valve and an air supply pipeline; the water source system includes a water source, a water supply adjusting valve and a water supply pipeline; the air source and the air supply adjusting valve are connected with the nozzle through the air supply pipeline; the water source and the water supply adjusting valve are connected with the nozzle through the water supply pipeline; one end of the purging pipeline is connected to the back end of the air supply adjusting valve, and the other end is connected to the back end of the water supply adjusting valve; the purging pipeline is provided with a manual purging stop valve and a one-way stop valve from an intake end in sequence; a redundant water discharge pipeline is arranged in the lowest place of the water supply pipeline, and is positioned at the back end of the water supply adjusting valve; and a redundant water discharge stop valve is arranged on the redundant water discharge pipeline. The device effectively removes redundant water in the water supply pipeline through simple modification, and reliably realizes anti-freezing of outdoor water supply pipeline.
Owner:CHINA HELICOPTER RES & DEV INST

Vending machine

The invention aims to provide a vending machine. The vending machine is mainly composed of a transmission device, a plurality of box bodies, a discharging port, a control device and the like, whereinthe transmission device is arranged at the bottom in a shell and used for making contact with and conveying the box bodies, the box bodies are sequentially arranged above the transmission device in afolded and stacked mode, the discharging port is formed in the shell, and the control device is electrically connected with the transmission device and used for controlling conveying of the transmission device. The transmission device is used for making contact with the box body located at the bottom of the shell and conveying the box body. The discharging port is used for outputting the box bodywhen the transmission device conveys the box body towards the side where the discharging port is located. Compared with the prior art, the vending machine has the advantages that the box bodies can besold, the occupied size is small, and the storage quantity of the box bodies is large.
Owner:DI YI SHANGHAI INTELLIGENT TECH CO LTD

Oil storage tank cleaning system and method

The invention provides an oil storage tank cleaning system. The system comprises a guide rail rack (2), a sidewall cleaning device (3) and a bottom surface cleaning device (4), wherein the guide rail rack (2) is mounted to an opening in the top part of an oil storage tank; the sidewall cleaning device (3) is mounted to the guide rail rack (2) and can move relative to the guide rail rack (2); the bottom surface cleaning device (4) comprises a control unit (41) which is positioned in a center area of the bottom surface of the oil storage tank, and a cleaning unit (42) which is connected to the control unit (41) and used for cleaning the bottom surface of the oil storage tank. With the adoption of the system, the oil storage tank can be regularly cleaned without artificial interference. The invention also provides an oil storage tank cleaning method utilizing the abovementioned oil storage tank cleaning system.
Owner:宋局

Method for rapidly preparing transition metal oxygen evolution catalyst by utilizing seawater

The invention discloses a method for rapidly preparing a transition metal oxygen evolution catalyst by utilizing seawater. The method comprises the following steps: carrying out pretreatment such as rough filtration on the seawater, removing impurities in the seawater, inoculating waste metal sheets as a metal source into the treated seawater, adding a proper amount of halogen salt as a buffer agent, adjusting a potential window, electrifying for electrolysis, repeatedly washing the obtained precipitate with distilled water for multiple times, and carrying out centrifugal drying to obtain theefficient oxygen evolution catalyst. The method is simple in design and easy to operate, the characteristics of low decomposition voltage and high metal corrosion speed of the seawater are utilized, the waste metal sheets are used as electrodes to electrolyze the seawater, the efficient oxygen evolution electrochemical catalyst is prepared, and the efficient oxygen evolution electrochemical catalyst has very important significance in environmental protection and seawater utilization.
Owner:YANSHAN UNIV

Sunflower harvester

The invention provides a sunflower harvester which comprises a sunflower-row cutting part, a transferring part, a threshing part and a screening storage part, wherein sunflower stalks are cut off by a serrated knife to obtain sunflower heads; the sunflower heads are transferred to the threshing part from the transferring part for threshing; the sunflower heads are rubbed and pressed by rotating an inner cylinder; the threshed grains are screened by a dual-layer vibrating screen and are centralized and elevated to a grain storage bin in a spiral conveying manner. The sunflower harvester has the benefits that only the sunflower heads are cut; the stalks on the sunflower heads are extremely short and convenience is brought to subsequent threshing and screening; the grains and the heads are thoroughly separated; the sunflower heads are great in broken piece; the grains and the heads are easily separated; sunflower seeds are prevented from being broken; when the sunflower harvester and the sunflower reaper are combined, the sunflower seeds with fewer impurities can be directly obtained from the field; the threshing, screening and storing for a stock bin can be realized; the stock bin is great in size and high in capacity, so non-stop harvesting for a longer time can be realized.
Owner:许开军

Stirring and forming device assembly and method for producing building block blank body by stirring and forming device assembly

The invention discloses a stirring and forming device assembly. The stirring and forming device assembly comprises a stirring device for stirring slurry, a forming device for enabling the slurry to befoamed and formed and a grabbing device for separating the forming device from foamed formed building blocks. A mold track is arranged at a discharging outlet of the stirring device, the forming device is slidably mounted on the mold track, and the grabbing device is erected above the mold track. According to the stirring and forming device assembly, the structures of the stirring device, the forming device and a pulling device are separately improved, so that the stock of the foamed building blocks on the same track is greatly increased, and the production efficiency can be nearly doubled. The invention relates to a method for producing a building block blank body. The method for producing the building block blank body comprises the following steps of (1) stirring and preparing the slurry, (2) adding a foaming agent for secondary stirring, (3) foaming and forming, and (4) separating a mold. Two stirring mechanisms can separately stir two independent chambers, so that the stirring effect of the slurry is remarkably improved.
Owner:中创环能建材科技有限公司

Full-automatic dust generating device

The invention provides a full-automatic dust generating device which is characterized in that a hopper is mounted on a rack, and an electromechanical control box and a feeding mechanism are mounted inthe rack; the hopper is filled with powder, and a stirring material level sensing mechanism and a gate plate mechanism are arranged between the hopper and the feeding mechanism. The stirring materiallevel sensing mechanism is installed at the bottom of the hopper and used for scattering powder in the hopper and detecting the height of the material level of the powder in the hopper, and the stirring material level sensing mechanism scatters the powder so that the powder can enter the feeding mechanism conveniently. The flashboard mechanism is arranged below the stirring material level sensingmechanism and is used for adjusting the opening degree of the flashboard according to the dust generation concentration condition of the device, so that full-automatic dust generation is realized, the operation is simple and convenient, the labor intensity is reduced, remote control is realized, the experiment difficulty in a polluted environment is avoided, and the body health of workers is guaranteed.
Owner:武汉碧海云天科技股份有限公司

Electric vacuum cleaner

InactiveCN1644154AReduce suction air volume dropReduce odorSuction filtersPulp and paper industryRotational flow
The present invention provided a novel vacuum cleaner adopting a merit of a paper bag type vacuum cleaner excluding a point of economical efficiency and a merit of a cyclone type vacuum cleaner. This vacuum cleaner is provided with a motor chamber 3 incorporating an electric blower 2 and having a suction port 3a in its front, a paper bag 4 disposed in front of the motor chamber 3 and having a suction port 4a in its front, a dust collecting chamber 5 having a suction hose connecting port 9 in its front and capable of incorporating the paper bag 4 with the suction port of the paper bag communicated with the suction hose connecting port 9, and a rotational flow generating mechanism rotationally turning air including dust sucked in the paper bag 4 in the paper bag 4 and centrifugally separating the dust.
Owner:SANYO ELECTRIC CO LTD

Manufacturing method of scripture piece of prayer wheel

The invention discloses a manufacturing method of a scripture piece of a prayer wheel. The method comprises the steps that 1, scripture is input into a computer through CAD software for composing; 2, the composed scripture is printed out through printing paper; 3, the printing paper is spliced and subjected to composing, a microfilm camera is used for photographing, and the microfilm camera exposes scripture images and records the images to a microfilm, wherein the microfilm is a primary scripture piece of the prayer wheel; 4, the primary scripture piece is coated with a transparent protective film in a vacuum mode, fastener structures capable of being mutually connected are processed at the two ends of the primary scripture piece, and therefore the final scripture piece is formed. The scripture is input into the computer through the CAD software for composing, the word size and word distance can be adjusted according to practical requirements, and the scripture stock is increased; the composed scripture is printed out through printing paper and then subjected to miniature processing, an ultra high definition two-dimensional displayer can be replaced, equipment used for scripture piece production is more simple, and the method is suitable for being popularized.
Owner:周芳源

Wet process of fabricating fiber wall panels

This invention discloses a wet process of fabrication of fiber wall panel, which includes the following steps: 1) slurry making: mix nontimber type natural plant fiber slurry with grass family slurry according to 1:0˜1.5 dry weight ratio, and add water to dilute this slurry; 2) slurry storage: pour the mixed slurry into slurry storage tank and add water for dilution; 3) suction straining and forming: pour slurry into mold cavity for cold pressing, dewatering, and forming, to yield wet blanks; 4) hot pressing, forming, and drying: move the Wet blanks to the hot pressing mold for hot pressing and remove moisture generated during hot pressing, to yield fiber wall panel. Fiber Wall panel made by this process features environment friendliness and high strength.
Owner:NANJING UNIV OF TECH DAFENG INST OF MARINE IND

Red mud-based ferrate mixture soil remediation agent as well as preparation method and application thereof

The invention discloses a red mud-based ferrate mixture soil remediation agent as well as a preparation method and application thereof and a preparation method. The preparation method comprises the following steps: mixing dried red mud with alkali metal peroxide in proportion, and grinding; and calcining the uniformly mixed solid powder to obtain the red mud-based ferrate mixture soil remediationagent. The characteristics of ferrate and the characteristics of red mud are combined, the red mud is used as a raw material, alkali metal oxide is added, ferric oxide contained in the red mud is converted into ferrate with high oxidability through a ferrate thermochemical oxidation method, and the red mud-based ferrate mixture soil remediation agent is prepared and used for soil improvement and remediation. And good soil remediation and improvement effects can be achieved.
Owner:SHANDONG UNIV

Safe and energy-saving high-purity sulfuric acid production device and operation method

The invention relates to a safe and energy-saving high-purity sulfuric acid production device and an operation method. The device comprises a header tank, a heat exchanger, a heating kettle, a rectifying column, a condenser pipe, a low-boiling-point substance storage tank and a product storage tank, wherein heating rod inserting holes are respectively formed at two ends of the heating kettle; an electric heating rod is inserted into each heating rod inserting hole; slag discharge holes are respectively formed in the lower parts of two ends of the heating kettle; a slag discharge control valve is arranged on each slag discharge hole; the lower part of the rectifying column is connected with the heat exchanger; a snakelike condenser pipe is arranged inside the heat exchanger; a sulfuric acid raw material is preheated through the heat exchanger and enters the heating kettle; current is introduced into an electric heating rod, so that the electric energy is converted into heat energy, so as to generate heat inside the sulfuric acid, and boil and vaporize the sulfuric acid to enter the rectifying column; and the purified high-purity sulfuric acid and a raw material sulfuric acid are subjected to heat exchange, and cooled, so as to obtain the product. The invention provides the high-purity sulfuric acid production device, which is simple in structure, small in volume and heat radiating area, less in acid storage amount, high in safety, free of scale crust on the heating wall surface, long in service life, stable to operate, energy-saving and water-saving, and a method thereof.
Owner:TIANJIN ZHONGKE CHEM ENG DESIGN +1

Geopolymer pervious concrete and preparation method thereof

The invention discloses geopolymer pervious concrete and a preparation method thereof. The preparation method comprises the following steps: uniformly stirring copper smelting slag, metakaolin, an exciting agent, water and aggregate according to a certain mixing ratio, injecting the formed mixture into a mold for curing and molding, and preserving moisture at 30 DEG C for 28 days so as to prepare the high-performance environment-friendly geopolymer pervious concrete. The obtained pervious concrete material has very high breaking strength and compressive strength.
Owner:FUJIAN AGRI & FORESTRY UNIV
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