17 results about "Lime-nitrogen" patented technology

The invention discloses an automatic lime nitrogen material preparation and dust removal device and a use method thereof, and relates to the technical field of chemical production, the following scheme is provided: the device comprises a machine body, and also comprises a quantitative material preparation mechanism arranged on the machine body and used for automatic quantitative material preparation of lime nitrogen; the feeding mechanism is arranged in the machine body and used for moving quantitatively prepared lime nitrogen out of the machine body, and one end of the feeding mechanism is connected with the quantitative material preparation mechanism; and the dust falling adsorption mechanism is arranged on the machine body. Through the quantitative material preparation mechanism, the problems that manual material preparation is high in labor intensity, low in efficiency and difficult in precision guarantee are solved, the production efficiency is improved, raw material waste is avoided, and the stability of the subsequent production process and the product quality are guaranteed; the dust problem in the lime nitrogen preparation process is effectively solved through the filtering process of a purification adsorption plate of the dust falling adsorption mechanism, the threat of dust to the health of operators is avoided, the dust explosion risk of a production workshop is reduced, and the modern green production requirement is met.

The invention relates to the technical field of ardealite resource utilization, in particular to a method for preparing a soil conditioner by treating ardealite through lime nitrogen residues and the soil conditioner. After the lime nitrogen residues and the ardealite are naturally air-dried till the water content is smaller than or equal to 25%, the lime nitrogen residues and the ardealite are smashed and sieved to be prepared into powder; the lime nitrogen slag powder and the phosphogypsum powder are uniformly mixed according to a proper mass ratio, and nutritional ingredients in the lime nitrogen slag and the phosphogypsum are fully utilized, so that the lime nitrogen slag and the phosphogypsum are added into soil to supplement nutrients, reasonable matching of the nutrients in the conditioner is guaranteed, and the soil improvement and conditioning effects are achieved; activated slag is added, uniformly stirred and modified, the pH value is adjusted, then aging treatment and granulation are performed, free acid radicals (phosphate radicals, sulfate radicals and the like) in ardealite are promoted to be solidified, the content of heavy metal in the obtained soil conditioner is extremely low, and the requirement of ardealite soil conditioner (HG / T 4219) is met.

The invention relates to the technical field of feeding reaction kettles, and discloses a reaction kettle for lime nitrogen three-dimensional mixed feeding and a using method thereof.The reaction kettle comprises a barrel body, a hollow column, a stirring device, a stirring device and a stirring device, the surface of the barrel body is communicated with an air pipe, and the hollow column is vertically installed in the center of the top of the barrel body and communicated with the barrel body; the automatic feeding assembly is used for adding raw materials for producing lime nitrogen into the barrel body; the monitoring assembly and the detection assembly are used for monitoring the process of preparing the lime nitrogen in the barrel body. The device can automatically detect whether raw materials fed at a time completely react or not, and after the raw materials fed at a time completely react, the raw materials can be automatically fed again, so that the situation that the next feeding is carried out when ammonia cyanide and calcium oxide do not completely react after feeding, so that the ammonia cyanide and calcium oxide are accumulated, and the production cost is reduced is avoided. Therefore, the use effect of the equipment is improved.

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 utility model discloses a rotary kiln screening device for lime nitrogen production, which comprises a screening box, a first discharge port is arranged on the left side of the screening box in a penetrating manner, a second discharge port is arranged on the right side of the screening box in a penetrating manner, a rotary kiln body is arranged in the screening box in a lap joint manner, and a driving assembly is arranged on the rear side of the screening box. A discharging assembly facilitating even falling of lime nitrogen is arranged in the screening box, and a screening assembly used for screening the lime nitrogen is arranged in the screening box. Lime nitrogen is screened through the vibrating screen, the rotating speed of a first cam in the driving assembly is smaller than that of a second cam, so that the discharging speed of the lime nitrogen is reduced, the screening speed of the lime nitrogen is increased, materials continuously jump and roll over on the screen, the materials are prevented from being stacked and agglomerated, and the screening efficiency is improved through the difference between the screening speed and the discharging speed. Therefore, the lime nitrogen is prevented from being accumulated at the top of the screen, and the accumulated lime nitrogen knot is avoided.

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 invention discloses an automatic kettle pressure control device for a lime nitrogen hydrolysis kettle and a use method thereof, and belongs to the technical field of hydrolysis kettles. Comprising a device body, one side of the upper end of the device body is connected with a feeding assembly, the feeding assembly drives a circular sealing plate through a two-way threaded rod, input of lime nitrogen and water can be rapidly cut off when pressure is abnormal, and after a pressure relief assembly is started, if an infrared sensor detects that the pressure is still continuously increased, for example, material unbalance is caused by blockage of a discharging port, the feeding assembly is started. The system automatically starts a second driving motor, an L-shaped sliding block drives a circular sealing plate to seal a feeding channel, the situation that reaction heat release and gas production are aggravated due to continuous feeding is avoided, feeding and pressure linkage control breaks through the limitation that materials are not controlled only through pressure relief in the traditional process, the root cause of pressure rising is restrained from the source, and the production efficiency is improved. Dynamic coupling of material balance and pressure balance is achieved, the stability of the system is remarkably improved, and the service life of the device is prolonged.

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 invention relates to the technical field of insect prevention and control, and particularly discloses a cold smoke machine and lime nitrogen combined red imported fire ant comprehensive prevention and control method which comprises the following steps: manually positioning a red imported fire ant nest, and determining a treatment area; the preparation method comprises the following steps: mixing the solenopsis invicta proportioning drug, water and a special atomizing agent for the cold range hood according to a mass ratio of 1: 4: 20 to prepare a solution, and filling the solution into a liquid storage tank of the cold range hood; a smoke cooling machine is started, the solution is converted into smoke with the atomized particle size being 1-5 microns through an atomization system, and the smoke is diffused into the ant nest under the conditions that the injection pressure is 0.5-1.5 MPa and the diffusion speed is larger than or equal to 5 m / s; after smoke diffusion is completed, lime nitrogen is scattered to the surface of the treatment area according to the dosage of 50-200 g / m < 2 >, and a plastic film is used for covering and sealing; calcium and nitrogen fertilizer are supplemented after lime nitrogen is decomposed, the soil structure is improved, and solenopsis invicta is prevented from nesting again; through the diffusivity of the cold smoke machine and the lasting insect killing effect of lime nitrogen, the agent can rapidly permeate into the ant nest in a short time.

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.

The utility model discloses a pelletizer discharging conveying belt which comprises a fixing support, a connecting mechanism is arranged on the inner side of the fixing support, the connecting mechanism comprises a connecting assembly arranged on the inner side of the fixing support, the left section of the connecting assembly is connected with a discharging assembly, and the discharging assembly is connected with a conveying assembly. A sliding block is fixedly connected to the outer end of a connecting rod fixedly connected to the outer wall of the rotating block, the rotating sliding block abuts against a connected abutting block to move, a connecting block fixedly connected to the outer wall of a limiting rod fixedly connected to the bottom of the abutting block moves along with the sliding block, and a limiting spring connected to the outer wall of the limiting rod in a sleeving mode continuously stretches and contracts; the material shaking plate fixedly connected to the outer end of the connecting block deflects up and down in a reciprocating mode, discharging of materials is facilitated, through up-down shaking type deflection, part of small agglomerated materials are crushed and transmitted to a transmission conveying belt along the connected material shaking plate to be conveyed, and waste of lime nitrogen fertilizer caused by the violent transmission process is avoided.