8 results about "UREA SULFATE" patented technology

The invention discloses a steam-free filler-free compound fertilizer roller granulation process, and belongs to the technical field of compound fertilizer granulation. The steam-free filler-free compound fertilizer roller granulation process comprises the following steps: step 1, firstly preparing urea sulfate for later use, and then proportioning various raw materials and additives according to a set proportion; step 2, mixing and crushing the raw materials and the additives which are prepared in the step 1; 3, feeding the mixed and crushed raw materials and additives in the step 2 into a granulator, and spraying urea sulfate into the granulator; 4, all the raw materials, the additives and urea sulfate in the step 3 continuously react, heat and dissolve, and rolling and granulating are conducted under the action of a granulator; according to the invention, the additive is added in the granulation process, so that the additive and the urea sulfate are subjected to neutralization reaction to release heat, and water-soluble small-particle cores are generated and are used for rolling small balls into large balls for granulation, so that the problem that steam and auxiliary fillers are needed for granulation of the urea-based compound fertilizer by using the urea sulfate in the prior art is solved.

The utility model relates to the technical field of compound fertilizer production, and discloses a preparation device of urea sulfate formaldehyde slurry, which comprises a batching ground groove, a sealing cover I is arranged above the batching ground groove, a sulfuric acid and urea feed port is fixedly arranged above the sealing cover I, a slurry feed port is fixedly arranged above the sealing cover II, and the sealing cover II is fixedly arranged above the slurry feed port. A reaction bin is arranged at the bottom of the second sealing cover, a heating bin is fixedly installed on the outer side of the reaction bin, a fourth conveying pipeline is fixedly installed at the bottom of the heat exchanger, and after slurry is pumped out by the submerged pump and conveyed into the heat exchanger through the first conveying pipeline, the slurry can be subjected to heat exchange by a condensing agent entering a third connecting pipe in the heat exchanger; at the moment, the condensing agent subjected to heat exchange enters a heating bin through a fourth conveying pipeline, the interior of a reaction bin is heated through the heating bin, meanwhile, slurry and formaldehyde injected from the interior of a formaldehyde conveying pipe are stirred and fused, and therefore the effect of waste heat utilization is achieved.

The utility model discloses a urea sulfate reaction device which comprises a reaction tank, a stirring shaft is rotationally connected into the reaction tank, stirring blades are fixed to the outer wall of the stirring shaft, a driving motor fixed to the stirring shaft is fixed to the top end of the reaction tank, the two sides of the top end of the reaction tank communicate with a urea pipe and a sulfuric acid pipe correspondingly, and the two discharging boxes are rotationally arranged on the two sides of the top end of the inner wall of the reaction tank correspondingly. Urea and sulfuric acid are discharged in through a urea pipe and a sulfuric acid pipe correspondingly, the urea and the sulfuric acid are conveyed into the two discharging boxes correspondingly, then when a driving motor drives a stirring shaft and stirring blades to rotate, the two discharging boxes can be driven to rotate in cooperation with use of a rotating assembly, and when the two discharging boxes rotate, under the effect of rotating centrifugal force, the two discharging boxes are driven to rotate. Urea and sulfuric acid can be uniformly sprinkled in the reaction tank, and the urea and the sulfuric acid are preliminarily mixed together, so that rapid mixing and stirring of the urea and the sulfuric acid are facilitated, and the stirring efficiency of the urea and the sulfuric acid is improved.

The utility model relates to the technical field of reactors, in particular to a urea sulfate and ammonia tubular reactor which comprises a reactor body, the reactor body comprises a reaction container, and the surface of the reaction container is fixedly connected with a first feed port. According to the reaction device, the first rotating rod drives the first conical teeth to rotate, so that the second conical teeth can drive the second rotating rod to rotate under the action of the first conical teeth, the stirring rod and the scraper blade can rotate along with the second rotating rod, and urea sulfate and ammonia in the reaction container can be stirred through the rotation of the stirring rod; the contact area between urea sulfate and ammonia can be increased, the reaction can be more uniform and rapid, the urea sulfate and the ammonia can be fully mixed, the reaction efficiency can be improved, the reaction can be more complete, and therefore the granulation quality is improved; the inner wall of the reaction container can be scraped through rotation of the scraping plate, and accumulation of urea sulfate can be avoided; furthermore, urea sulfate and ammonia can be better mixed and reacted.

The utility model relates to the technical field of compound fertilizer production equipment, and discloses urea sulfate formaldehyde compound fertilizer production equipment which comprises a urea formaldehyde reaction unit, an ammonium sulfate reaction unit, a granulation unit and a post-treatment unit which are communicated through pipelines, and the post-treatment unit comprises a primary dryer and a secondary dryer which are communicated; the granulation unit comprises a batching tank and a rotary drum granulator which are communicated with each other, and the outlet end of the rotary drum granulator is communicated with the primary dryer; the ammonium sulfate reaction unit comprises a tubular reactor, and the outlet end of the tubular reactor is communicated with a rotary drum granulator; the urea formaldehyde reaction unit comprises a reaction tank and a middle tank which are communicated, an inlet end pipeline of the reaction tank is communicated with the urea bin and the formaldehyde tank, the middle tank is communicated with a discharge pipe, and the other end of the discharge pipe extends into the secondary dryer and is provided with a plurality of nozzles. According to the scheme, the sulfuric acid slurry and the urea formaldehyde solution are added in different production stages of the compound fertilizer, so that the influence of sulfuric acid on the structural stability of urea formaldehyde is effectively reduced, and the slow-release effect of the urea formaldehyde slow-release compound fertilizer is improved.

This utility model relates to the field of compound fertilizer processing technology and discloses a device for extruding compound fertilizer and spraying urea sulfate solution. The device includes a fixed frame with a roller inside. A conveying assembly includes a docking groove at the bottom of the roller, a connecting frame inside the docking groove, and an annular groove on the inner wall of the docking groove. Multiple columns are installed on the inner wall of the roller, each containing a partition. A sliding groove is provided on the inner wall of the annular groove, with an electromagnet installed on one end of the sliding groove. A bottom plate and a slider are installed inside the sliding groove. A magnetic plate is installed on one side of the slider, and a piston is installed on the other side. A damping wheel is installed at the end of the slider near the bottom plate. This utility model, by designing a structure specifically for conveying urea sulfate solution, allows the solution to be directly injected into the raw materials within the roller, avoiding direct contact with the hopper wall during injection, reducing corrosion of the roller. Furthermore, the small, multiple injections prevent liquid accumulation and improve the uniformity of mixing with the compound fertilizer raw materials, ensuring the quality of granulation.

The invention discloses a chemical flue gas desulfurization method which specifically comprises the following steps: S1, flue gas pretreatment: uniformly mixing chemical flue gas containing sulfur dioxide with ozone according to a certain molar ratio, sequentially feeding the mixed flue gas into a belt cooler and a flue gas heater, and raising the temperature of the mixed flue gas to a temperature range suitable for reaction; the invention relates to the technical field of flue gas desulfurization. According to the chemical flue gas desulfurization method, sulfur dioxide in the chemical flue gas can be efficiently removed in a manner of combining ozone pre-oxidation and urea reaction, part of sulfur dioxide is oxidized into sulfur trioxide by ozone, the reaction activity of sulfur dioxide is improved, urea reacts with sulfur dioxide and sulfur trioxide to generate urea sulfate, and the sulfur dioxide and the sulfur trioxide are fully reacted. The method realizes deep removal of sulfur dioxide, in practical application, the method can significantly reduce the emission concentration of sulfur dioxide in flue gas, meets the strict environmental protection emission standard, converts the removed sulfur dioxide into a urea sulfate product, and realizes recovery and reutilization of sulfur resources.