10 results about "Lime-nitrogen" patented technology

The application discloses a kind of dynamics calculation method, dynamics calculation model and application of lime nitrogen method process preparation cyanamide, the dynamics calculation method includes the following steps: step 1, construct reaction system molecular initial model;Step 2, structure optimization and vibration analysis are carried out to molecular initial model;Step 3, transition state search is carried out to reaction path;Step 4, the free energy of solute molecule in aqueous solution environment is calculated;Step 5, reaction kinetics and thermodynamic parameter calculation.The dynamics calculation model of lime nitrogen method process preparation cyanamide of the application reveals the microcosmic reaction mechanism of lime nitrogen method process, obtains Arrhenius kinetics equation, and reaction activation energy, pre-exponential factor and other key kinetic parameters, chemical reaction information such as intermediate, transition state that cyanamide generates experiences, forms theoretical support for the reaction process optimization improvement of lime nitrogen method, provides process parameter design basis for the optimization of equipment and plant scale system optimization.

The invention discloses a method for eradicating worst weed cyperus rotundus in southern dry farming acidified soil, and belongs to the technical field of crop weeding. The eradication method specifically comprises the following steps: by taking alkaline heating source nitrogenous fertilizer ammonium bicarbonate and lime nitrogen as core materials, decomposing the alkaline heating source nitrogenous fertilizer ammonium bicarbonate and the lime nitrogen in a high-temperature and high-humidity closed acidified soil environment to generate mixed products such as high-concentration alkaline ammonia gas, acidic carbon dioxide, cyanamide and dicyandiamide; the mixed product has a synergistic effect, the killing effect on ammonium poisoning in acid soil is remarkably enhanced, fatal ammonium poisoning is formed on deep cyperus rotundus tubers of the soil, the cyperus rotundus is thoroughly eradicated, meanwhile, the improvement effect on the southern dry farming acidified soil is taken into account, and the soil quality is improved. The technical problems that deep tubers of cyperus rotundus cannot be killed through single chemical weeding, relapse is prone to occurring, and soil deterioration is aggravated are solved.

The present application relates to a kind of preparation methods of high nitrogen content calcium cyanamide, comprising: solid calcium source, solid carbon source, additive are mixed to form reactant raw material, the active carbon calcium intermediate of metastable state is produced by heating pre-reaction to reactant raw material;Carbon calcium intermediate in situ with nitrogen nitrogenization reaction preparation calcium cyanamide.The calcium cyanamide prepared in the present application does not need to use calcium carbide as raw material, safe and simple.In addition, the calcium cyanamide produced in the present application has high effective nitrogen content, and the nitrogen content of lime nitrogen produced under optimized conditions can be as high as more than 28%, higher than the purpose industrial level.Third, the lime nitrogen produced in the present application is solid particles, which can be used directly as lime nitrogen fertilizer without granulation.Fourth, when preparing dicyandiamide, the calcium cyanamide produced in the present application does not need to be finely ground into fine powder, and the cyanamide waste residue produced after hydrolysis can be reused as raw material for producing calcium cyanamide, and the nitrogen content can exceed 22%, reaching the standard of superior product.

The utility model discloses lime nitrogen multipoint under-liquid three-dimensional feeding complete equipment, a uniform discharging mechanism comprises a plurality of bottom plates arranged at the bottom of a discharging hopper, one side of each of two bottom plates is fixedly connected with a first fixed seat, one side of one first fixed seat is rotatably connected with a first connecting rod, and the other side of the first connecting rod is rotatably connected with a second connecting rod; the other end of the first connecting rod is rotationally connected with a disc, the other end of the first connecting rod is located at the eccentric position of the disc, side plates are fixedly connected to the two sides of the bottom of the discharging box, strip-shaped holes are formed in one sides of the two side plates, and a second fixing base is fixedly connected to one side of one side plate. When the lime nitrogen is fed, the first connecting rod on one side can be pulled to move, the bottom plate on one side is driven to move in the pulling process, lime nitrogen in the lime nitrogen is released and blocked for a round when the disc rotates for a circle, the feeding amount of each time is fixed in the lime nitrogen feeding process, and the situation that feeding is not uniform is prevented.

The utility model discloses a lifting type stirring device, which belongs to the technical field of stirring machinery and comprises a lifting mechanism, a fixed rack, a stirring mechanism, a driving part, a movable rack, a movable platform, a fixed part and a bottom plate. A lifting part of the lifting mechanism lifts the movable rack, the driving part, the stirring mechanism and the bottom plate to proper positions through a traction part, lifting adjustment is carried out during stirring, a fixing shaft of the fixing part provides an axial moving track for a movable support and a linear bearing, and the driving part drives the stirring mechanism to rotate. Therefore, the lime nitrogen is fully stirred in a lifting manner and is prevented from being solidified; the linear bearing is fixed on the movable rack by the guide fixing plate, the fixed shaft is fixed on the fixed rack by the fixed shaft sleeve, so that the stirring mechanism can rotate and move in the axial direction, and the fixed shaft sleeve and the guide fixing plate can counteract the radial deviation and the counter-acting force of the stirring mechanism; the lifting mechanism and the movable platform which are detachably connected can enable a plurality of stirring mechanisms to share one lifting mechanism, so that the cost is reduced.

The application discloses a kind of selenium-removing agent water, preparation method of selenium-removing agent and selenium-removing agent, belong to wastewater treatment technical field, and the preparation steps of selenium-removing agent water are as follows: saturated sodium thiosulfate solution is configured, dilute sulfuric acid is added, and reaction mixture system A in a closed container is formed;Calcium oxide and lime nitrogen are mixed and added to the obtained reaction mixture system A, stirred and filled with nitrogen protection, filtered, and the obtained filtrate is selenium-removing agent water, after selenium-removing agent water is frozen crystallization, centrifugal drying is carried out, and selenium-removing agent in white or light yellow crystalline solid is prepared, the application is aimed at the selenium removal of copper smelting industrial wastewater, and the prepared selenium-removing agent water and selenium-removing agent can precipitate selenium in solution in the form of complex, with the advantages of small residue amount and simple operation, to achieve the purpose of deep selenium removal.

The present application relates to phosphogypsum resource utilization technical field, especially to a kind of method for preparing soil conditioner by using lime nitrogen slag to treat phosphogypsum and soil conditioner, using lime nitrogen slag, phosphogypsum natural air-drying to moisture content≤25%, respectively, powder is prepared after being crushed, sieved, and lime nitrogen slag powder and phosphogypsum powder are mixed uniformly with proper mass ratio, make full use of the nutrient components in lime nitrogen slag and phosphogypsum, so that adding to soil supplement nutrients, guarantee the nutrient combination in conditioner is reasonable, realize the improvement and conditioning effect to soil;Activated slag is added to be mixed uniformly, modified treatment, aging treatment after adjusting pH value, granulation, to make free acid radical (phosphate radical, sulfuric radical, etc.) in phosphogypsum be solidified, and heavy metal content in the obtained soil conditioner is very low, meet the requirements of "phosphogypsum soil conditioner" (HG / T 4219).

The invention belongs to the technical field of pest control, and particularly discloses a cucumber root-knot nematode control method. The prevention and control method comprises the following steps: (1) field soil treatment: firstly scattering farmyard manure into soil, then scattering lime nitrogen, then deeply ploughing the soil, and then ridging and bedding; (2) transplanting and field planting: transplanting and field planting the cucumber seedlings into field soil; (3) management: applying a control composition on the day of cucumber field planting, and applying bacillus atrophaeus after 6-8 days; in the initial flowering stage of the cucumbers, gamma-aminobutyric acid is applied, and after 6-8 days, escort bacillus is applied; applying the prevention and treatment composition in the fruiting period of cucumbers; the prevention and treatment composition comprises gamma-aminobutyric acid and 5-aminolevulinic acid. According to the control method, specific preparations are applied in stages, so that root-knot nematodes can be effectively controlled, cucumber growth can be effectively promoted, and the yield is increased.

The utility model relates to a metering type lime nitrogen conveying device which comprises a support, a material storage bin, a spiral metering scale and a pneumatic conveying assembly are arranged on the support, the material storage bin is located above the spiral metering scale, a discharging port of the material storage bin is connected with a feeding port of the spiral metering scale through a first flexible connector, a sieve plate is fixedly arranged in the material storage bin, and the pneumatic conveying assembly is connected with the spiral metering scale through a second flexible connector. A feeding hole of the storage bin is positioned above the sieve plate; a grinding mechanism is rotationally connected to the center of the top surface of the sieve plate; the pneumatic conveying assembly comprises an air pump and an air pipe, the air pipe is located below the spiral metering scale, the air pump is connected with an air inlet of the air pipe, a feeding pipe is fixedly connected to the outer wall of the air pipe, and a discharging port of the spiral metering scale is connected with the feeding pipe through a second flexible connector. According to the lime nitrogen conveying device, lime nitrogen cakes can be crushed before conveying, so that the lime nitrogen is conveyed more smoothly, the conveying efficiency is higher, and the reaction efficiency is higher after the lime nitrogen enters reaction equipment.

The invention relates to the technical field of ecological restoration, in particular to modified coal gangue-based artificial soil for ecological restoration of a waste dump. The fertilizer is prepared from the following components: modified coal gangue, fly ash, a compound microbial agent, an organic nutrient medium, modified bentonite, humic acid, quick lime, a nitrogen-phosphorus-potassium compound fertilizer, a microelement fertilizer, sodium carboxymethyl cellulose and a microbial protective agent. The coal gangue is subjected to a physical crushing and chemical weathering simulation synergistic modification process, the coal gangue forms reasonable grain composition through physical crushing, the powder builds a stable inorganic framework for artificial soil, a citric acid-phosphoric acid-EDTA-2Na composite modifier solution dissolves insoluble minerals in the coal gangue through the acid dissolution effect, and the water content of the coal gangue is reduced; inorganic nutrients in the coal gangue are activated through complexation, and the surface activity and nutrient release capacity of the coal gangue are improved, so that the problems that the original coal gangue is low in surface activity and poor in fertilizer and water retention capacity are solved, and a core base material foundation is laid for artificial soil.