Method of production of the granulated solid fuel and the installation for the method realization

FIELD: coal industry; municipal services; other industries; methods and devices for production of the grained solid fuel.

SUBSTANCE: the invention is pertaining to the process of production of the grained composite fuel, which is intended for usage in the communal heating supply systems or in the household purposes. The method of production of the grained solid fuel with the help of the installation includes grinding of the coal fines, introduction in the composition of the fuel of the ground vegetable additive (for example, the sawdust or the beet press), their joint grinding in the rotary roller mill, sending of the part of the produced mixture in the volume near to 1/3 to mixing with the binder and formation of the seed grains in the turbo-blade mixer. Further route the received mass of seed grains and the remaining part of the mixture in the volume near 2/3 from the mixer for granulation into the plate granulator. The binding is also routed in the granulator to form the seed grains. The produced granules of the spherical shape in the narrow range of the dimensions within 15-30 mm are dried and cooled in the sectional dryer and packed by means of the weighing-and-filling machine into the tare having the form of the cardboard boxes of the different dimensions intended for usage in the capacity of artificial fuel wood. The technical result of the invention consists in the reduced power input for the production process, simplification of the production process, improvement of ecology, the increased efficiency of production of the final product.

EFFECT: the invention ensures the reduced power input for the production process, simplification of the production process, improvement of ecology, the increased efficiency of production of the final product.

5 cl, 1 tbl, 1 dwg, 8 ex

 

The invention relates to the technology of granulated composite fuel that can be used for municipal and domestic purposes.

Known to manufacture carbon-containing fuel and fuel briquettes, providing for the grinding of raw materials, including peat, lignite, anthracite, coke, wood waste and as a binder - derived sulfonic acids, HUMATE, sodium or potassium, paraffin and liquid glass. Briquettes formed in a paper wrapper (RF patent No. 2094449, 10L 5/02, 5/10, publ. 27.10.1997). This cake is not a high heat of combustion and, hence, low fuel efficiency.

Closest to the present invention is a method of obtaining a granulated solid fuel (RF patent No. 2103328, 10L 5/04, 5/20, 5/00, publ. 27.01.1998), including the grinding of raw materials - small classes of brown coal, hard coal, anthracite, or mixtures thereof, drying and dermapathology coal at 450-600°in the vortex chamber at a heating rate of 10000-15000 deg/min, grinding coal mill and subsequent pelletizing disc granulator in the presence of a binding - lignosulfonate. Finished pellets are sent for packing, and formed small fraction is discarded and recycled to the process.

The main disadvantages of this method are the high energy intensity of the process at the stage of thermal, is using mainly coal, high grade, as well as the generation of waste in the form of fines. This increases the cost of the way and worsen working conditions.

Thus, the objectives of the proposed method are the reduction of energy intensity of production of pellets by eliminating phase thermal, coal low grades, getting the finished product almost without allocation of fines.

The problem is solved due to the fact that upon receipt of granulated solid fuel by grinding raw materials - coal, granulating in the presence of a binder and drying serves as a raw material to be crushed plant material, after grinding coal to a particle size less than 3 mm to mix and joint grinding of coal and plant material in the ratio (wt.%) 75-95:25-5 accordingly to the size of the particles of the mixture is less than 0.2 mm, the part of the mixture of about 1/3 to mix with a binder to form a mass of embryonic grain size of 3-5 mm, and granulation at the same time to direct the remaining portion of the mixture of about 2/3 and formed a mass of embryonic grains, while for the formation of the germ of grains and granulating use the same binder.

Thus

as plant material use sawdust or Svec ulicny pulp, or finely ground straw, or bagasse waste ethanol production;

- as a binder to use the liquid of plant origin - molasses, or sulfite-alcohol bard - alcohol production waste, or a solution of slaked lime, finely ground;

- for the formation of germ-grain binder serves to mix in the amount of 1-10% by weight of the supplied mixture and granulating binder serves in the amount of 1-10% by weight of the mixture sent to the granulation.

The use of a mixture of the same composition for the formation of the germ of grains and for granulation, and the same binder, and cooking germ of grains in the preparation of the components of the mixture immediately before feeding into the granulator allows to obtain granules of homogeneous structure, high strength and high ability to fire. The finished granules are produced in a narrow range of factions and almost no residual waste. The specified parameters of the process also contribute to the quality of pellets. The use of vegetable waste increases the igniting ability of the granules, and the use of molasses increases their strength.

Known devices for producing granulated products, including carbon.

A known device for getting at leadstream product (the Federal Republic of Germany patent No. 2421306, B01J 2/14, publ. 14.11.1974). The installation includes capacity for coal powder, additives and water, which is metered flow of the materials into the mixer and mixing in the presence of water. The mixture from the mixer is served in a plate granulator, in which both special. capacity served the coal particles in the role of the embryonic mass. In the granulator from separate tanks served with extra moisture.

After granulation receive a carbon-containing product in the form of granules or pellets are spherical.

The resulting pellets have insufficient mechanical strength, resulting in the potential loss of product during transportation and storage.

Closest to the present invention is the installation, as described in the application Germany No. 69613639. T2 01J 2/00, 01J 2/14, publ. 04.07.2002.

The installation includes a container for loose powder mineral materials, a screw device for grinding fibrous organic materials (wood, paper, cotton), and the capacity and the auger device is connected to the mixer for mixing mineral and fibrous material. The mixer also sent a binder medium and additives from the series of containers. The mixer through the tank and conveyor connected to the disc pelletizer, which is located near a series of capacity is th for filing in his binder. The obtained granules wet system and sent to the sieves to select granules of the desired size, which come in a drying apparatus with a cooling device, and waste in the process. After drying and cooling the granules are transferred to the system vibrating screens, classifying them and guide each class in a separate container from which the packing of the granules according to the classes in separate containers (bags or bags). This unit is designed for the manufacture of granular products for various purposes.

The main disadvantage of this setup is the technological complexity and the multistage obtain granulated finished product, the processing time and the need for large maintenance costs. And also when performing the individual steps is allocated dust, especially at the stage of preparation of the granulation in the use of dry binder and at the stage of filling.

The objective of the proposed installation is the process of simplifying and increasing the efficiency of obtaining granulation of the finished product, as well as improving the sustainability and efficiency of the operation.

The task is solved in that the device for producing granulated solid fuel, including storage capacity for raw materials - coal and capacity for the additive will increase the nutrient material, both United with a common mixer and plate granulator, coupled with the capacity for bonding, a drying device and the filling device, it is proposed between the capacity for raw materials - coal and mixer to introduce the pre-grinding of raw materials in the form of a rotary crusher, between the mixer and disc granulator to enter the device for the formation of the germ of grains in the form of turbolaser mixer, United also with the capacity for connecting the mixer to connect with disc granulator, which is communicated with a drying device in a sectional view of the dryer system of recirculation of the coolant provided with tusovochnym device in the form of a packing machine.

The proposed hardware setup allows to considerably simplify it and reduce stages of the process of obtaining granules. Introduction to the installation device for the formation of the germ of grains and threading feed mixture, embryonic weight and the binder reduces the stage and at the same time significantly improve the quality of pellets is their strength and uniformity of size.

Due to the use in the installation of high-efficiency devices with low power consumption significantly reduced the cost of performing the entire cycle of pelletized fuel. Rotary draw the ilıca provides uniform grinding coal to a particle size of about 3 mm Rotary-roller mill, used as a mixer, performs fine grinding of dissimilar materials due to internal recirculation of the particles of the mixture and produces a particle size less than 0.2 mm TurboPascal mixer used to obtain embryonic mass, provides the germ in a narrow range of fractions 3-5 mm, which serves as the basis for the finished granules in a given narrow range of sizes, i.e. increases the quality of the finished product.

The sectional construction of the drying device maintains the desired temperature in each section of the device. The recirculation system coolant reduces the energy consumption. Packing machine produces the finished products with high consumer properties, suitable for use in various purposes, as well as warehousing and storage. Cardboard shell also serves as a means for easy kindling artificial fuel logs.

The device setup is illustrated the accompanying drawing, which the scheme has a reservoir 1 for raw materials - coal, provided with a spout 2, the feed coal rotary crusher 3, from which crushed coal is fed to the mixer - rotary-rolling mill 4. From the tank 5 to the additive - plant material - additive through the spout 6 is supplied to the mixer 4, supplied the military drive (without items), from which part of the mixture in the amount of 1/3 is served in a device for the formation of the embryonic mass of seeds TurboPascal mixer 7, which also served binder from the tank 8 through the spout 9. The remainder of the mixture in the amount of 2/3 of the mixer 4 is served in a plate granulator 10, which simultaneously served embryonic mass of turbolaser mixer 7 and binder from the tank 8 through the spout 9. The finished granules from the granulator 10 are directed into the drying device - sectional dryer 11, from which the finished product is sent to the filling machine 12, famoudou granules in the container 13 in the form of a parallelepiped carton boxes or bags required capacity.

Way with the installation as follows. The main energy components of the composite fuel is coal particle size less than 50 mm, placed in a container 1 in the form of a hopper. From the tank 1 dispenser 2 coal is fed into rotary crusher 3 preliminary grinding to a particle size less than 3 mm, Then the crushed coal is fed to the mixer - rotary-rolling mill 4, in which from the tank 5 into the hopper through the spout 6 is served shredded plant material, such as sawdust (or beet-pulp, or finely ground straw, or bagasse waste production of ethyl sleep is that), mixed and pulverized in a mill 4 to particle sizes less than 0.2 mm, the Ratio of coal and plant parts in the mixture is (wt.%) 75-95:25-5 respectively. The mixture accumulates in the drive of the mixer 4.

Part of the prepared mixture of about 1/3 of the drive is directed to the formation of the germ of grains in TurboPascal the mixer 7, which for this purpose from the tank 8 through the spout 9 is applied binder, such as molasses, in the amount of 1-10% by weight fed to the mixing of the mixture. When processing the mixture in TurboPascal the mixer is formed mass of embryonic grain size of 3-5 mm for the subsequent formation of granules. Embryonic mass is served in a plate granulator 10, which simultaneously served the remainder of the mixture of about 2/3 of the drive of the mixer 4. The ratio of the flow from the mixer 4 in TurboPascal mixer 7 and directly into the granulator 10 can vary from 1/3 to 1/4. In the pellet mill 10 from the tank 8 through the spout 9 is served the same binder (molasses, or sulfite-alcohol bard - alcohol production waste, or a solution of slaked lime micronized), which serves for the formation of germinal seeds. A binder is fed into the granulator in the amount of 1-10% by weight of the mixture sent to the granulation.

The granulation is performed by sliding on the plate is the atom granulator 10 at an angle of inclination of the plate 45-75 degrees and the rotation speed of 30 to 90 rpm The granulating process takes 20-30 minutes management System granulating process with automatic regulation of the size of the granules dosing of raw materials and a binder, angle and speed of rotation of the plate. Ready wet granules of spherical shape with a diameter of 15-30 mm tray by gravity produced in the drying device 11 is a sectional view of the dryer system of recirculation of the coolant. The granules are dried at a temperature of 120-250°for 5-25 min, classified and cooled in the last section of the dryer. The cooled granules to vacuume device 12 in the form of a packaging machine that packages the finished fuel in the container 13 in the form of a parallelepiped in the form of boxes made of corrugated cardboard, designed for use as artificial logs. Carton sizes can be different depending on the purpose of fuel, and customer requirements, such as 10×10×30 cm, 15×15×30 cm, 15×15×40 cm and other

The obtained granular fuel in the form of artificial logs can be used for utility boiler, household stoves, fireplaces, for use in the country, as well as in extreme conditions, etc.

Packing machine can pack up the finished product in containers of various capacities.

Example obtain granules.

To obtain a 5 ton per hour pellet 4200 kg / hour ugolin the th trivia grade coal T is fed from hopper rotary crusher, where it is crushed to 3 mm, Then the crushed coal is fed into the rotary roller mill. It there is 750 kg per hour wood sawdust. The mixture is ground to a particle size less than 0.2 mm and accumulates in the drive. From the drive 3500 kg per hour of a mixture of the spiral conveyor is served in a plate granulator with a diameter of 3 meters of it There is 70 kg per hour binders in the form of an aqueous solution containing 35 kg of molasses. Also from the drive 1500 kg per hour of a mixture served in TurboPascal mixer which is supplied with 30 kg per hour binders in the form of an aqueous solution containing 15 kg of molasses. From TurboPascal mixer formed globules in the form of grains with a diameter of 3 mm is fed into the granulator. Examples of the proportions of components in the mixture are given in table. The finished granules with a diameter of about 30 mm out of the granulator at the receiving tray, where the vertical Elevator served in a vertical dryer for drying at a temperature of 120°C for 15 minutes. The dried pellets from the dryer are available in the tray of a spiral conveyor, feed pellets into the hopper of the dosing device packaging machines. The metering device generates 700 kg of pellets in big bags. If configured dispenser gives portions 50 kg Kraft paper bags. The mass of the granules can vary up to 5 kg, Packed in small paper Kraft bags. When with testwuide configuring the metering device portions of pellets per 5 kg Packed in a cardboard carton size 150× 150×300 mm

Examples of the ratios of the components of the mixture.

No.The components of the mixture, %Modes of carrying out the drying
CoalHerbal SupplementBinderTemperature, C°Time min
17520512025
28015518020
38510524015
4905518010
5752412505
675151012015
7945125010
88551025020
Note: in all examples, the yield is about 100%.

1. The method of obtaining Gras is Ulyanova solid fuel, including the grinding of raw materials - coal and granulating in the presence of a binder, characterized in that the raw material is injected also Supplement the crushed plant material, after grinding coal to a particle size less than 3 mm carried out the mixture and joint grinding of coal and plant material in the ratio, wt.%: 75-95:25-5 accordingly to the size of the particles of the mixture is less than 0.2 mm, the part of the mixture of about 1/3 mixed with a binder to form a mass of embryonic grain size of 3-5 mm and granulation at the same time send the remaining portion of the mixture of about 2/3 and formed a mass of embryonic grains, while for the formation of the germ of grains and granulating use the same binder, granulating is carried out before the formation of granules with a size of 15-30 mm, the obtained granules are dried at 120-250°within 5-25 minutes

2. The method according to claim 1, characterized in that the additive of plant material use wood chips or sugar beet pulp.

Cab according to claim 1, characterized in that the binder used is molasses.

4. The method according to claim 1 or 3, characterized in that for the formation of the germ of the grain binder serves to mix in the amount of 1-10% by weight of the supplied mixture and granulating binder serves in the amount of 1-10% by weight of the MCA and, directed by granulation.

5. Installation for implementing the method according to claims 1-4, including the capacity for raw material coal fines and capacity to Supplement plant material, both connected to a common mixer and plate granulator, coupled with the capacity for bonding, a drying device and the filling device, characterized in that between the capacity for raw materials - coal and mixer, made in the form of a rotary drum mills entered the pre-grinding of raw materials in the form of a rotary crusher, between the mixer and disc granulator introduced coupled with the device for the formation of the germ of grains in the form of turbolaser mixer, United also with capacity for binding, and a mixer connected to the disc pelletizer, which is communicated with a drying device in a sectional view of the dryer system of recirculation of the coolant provided with tusovochnym device in the form of a packing machine.



 

Same patents:

FIELD: manufacture of fuel elements from wood dust produced at wood-working houses.

SUBSTANCE: wood dust 17 and binder are fed by means of charging device 15 and device 18 for feeding of binder into space 16 between contours 1 and 2 made from steel whole stretched or plated belt. Cylindrical drive brushes are positioned in upper parts of both contours. Mass produced is mixed and compacted in space 16 upon actuation of drive units 5, 6 and movement in downward direction of adjacent runs of contours 1 and 2. Pressure of compressed mass is perceived by converging runs of both contours and by straight roller supports 10 and 11 mounted on columns 3 and 4. Simultaneously with displacement of mass in downward direction, said mass is cut-through by acute edges of partitions 14 when partitions 14 of contour 1 approach run of contour 2. On approaching to lower units 5 and 6, individual fuel elements 20 formed as bars-logs are produced from said mass. Fuel elements are discharged onto conveyor 19.

EFFECT: increased efficiency and simplified construction of complex, and reduced costs for manufacture of said complex.

4 cl, 3 dwg

FIELD: heat-and-power industry; wood-working industry; petroleum industry: other industries; methods of production of the fuel briquette.

SUBSTANCE: the invention is pertaining to the method of production of the fuel briquettes, which may be used as the fuel in the municipal housekeeping, in the residential buildings boiler rooms in the capacity of the kindling material for ignition, and also in the capacity of the heat insulating material. The method of production of the fuel briquette provides for injection molding of the filler material in the form of the waste of the woodworking industry mixed with petroleum. In the capacity of the filler material use 80-85 % of the salvage sawdust saturated with petroleum at purification of the oil-polluted waste waters, in which add 15-20 % of wood meal, intermix and mold under pressure of 4.5 - 5 MPa. The invention allows to produce the briquettes of the higher thermal value, the smaller ash content, and also allows to recycle the wastes of the industrial productions and to improve the ecological state of the environment.

EFFECT: the invention ensures production of the briquettes of the higher thermal value, the smaller ash content, and also to recycle the wastes of the industrial productions and to improve the ecological state of the environment.

1 ex

FIELD: manufacture of building materials.

SUBSTANCE: invention relates to manufacture of molded fuel, in particular to fabrication of high-carbon fuel briquettes, which can be used when smelting cast iron in cupola-furnaces, when producing calcium carbide, silicon carbide, mineral fibers, and other materials. Process according to invention comprises mixing ground solid fuel with binder in amount 5-9% of the weight of ground solid fuel and briquetting mix followed by heat treatment of briquettes. Ground solid fuel is composed of coke fines with particle size 0.05-16.0 mm, 50-80%, and thermoantracite fines with particle size 0.05-6.0 mm, 20-50%. Binder is lignosulfonates modified with 3-5% of petroleum or petroleum products. Briquetting of mix is effected under pressure 25 MPa.

EFFECT: reduced power consumption, investment and operational expenses, increased briquette fabrication productivity, and increased strength, heat resistance, and calorific value of fuel briquettes.

3 ex

FIELD: manufacture of building materials.

SUBSTANCE: invention relates to manufacture of molded fuel, in particular to fabrication of high-carbon fuel briquettes, which can be used when smelting cast iron in cupola-furnaces, when producing calcium carbide, silicon carbide, mineral fibers, and other materials. Process according to invention comprises mixing ground solid fuel with binder in amount 5-9% of the weight of ground solid fuel and briquetting mix followed by heat treatment of briquettes. Ground solid fuel is composed of coke fines with particle size 0.05-16.0 mm, 50-80%, and thermoantracite fines with particle size 0.05-6.0 mm, 20-50%. Binder is lignosulfonates modified with 3-5% of petroleum or petroleum products. Briquetting of mix is effected under pressure 25 MPa.

EFFECT: reduced power consumption, investment and operational expenses, increased briquette fabrication productivity, and increased strength, heat resistance, and calorific value of fuel briquettes.

3 ex

FIELD: solid fuels.

SUBSTANCE: process consists in that for fabrication of robust brown-coal briquettes, which can be used as fuel for combustion in household and industrial furnaces, coal is first crushed and classified until fineness less than 6 mm, after which household polyethylene waste obtained through cutting polyethylene film into pieces less than 7 mm long is added to coal being briquetted in amounts of 6-7% of the weight of dry coal. Resulting mix is then heated to 90-130°C and compacted into briquettes characterized by mechanical strength 5.5 MPa.

EFFECT: improved robustness of briquettes and partially solved polyethylene waste disposal problem.

1 dwg, 1 tbl

FIELD: alternate solid fuels.

SUBSTANCE: invention relates to the field of solid fuel briquettes mainly consisting of carbon-containing materials fabricated with the aid of organic or mineral binder. Method of invention comprises breaking coal, binder, and catalyst (alkali metal salts) to particle size not larger than 100 μm, mixing them with water, briquetting, and drying briquettes. According to invention, coal is preliminarily baked under anaerobic conditions at temperature not exceeding 1000°C and liquid component is prepared by first mixing broken binder (5-25%) and catalyst (3-20%) with water (60-90%) and thus prepared mix is further mixed with crushed coal at weight ratio (60-90):(15-35). Fuel briquette itself is also disclosed containing 14-28% water, 3-8% binder reduced to particle size not larger than 100 μm, 1-5% catalyst, and baked coal. As a result, compression strength and resistance to abrasion of fuel briquettes are increased by 1.2 and 1.5 times, respectively.

EFFECT: increased strength of briquettes and achieved flameless burning thereof.

16 cl, 3 dwg, 10 ex

FIELD: alternate solid fuels.

SUBSTANCE: invention relates to the field of solid fuel briquettes mainly consisting of carbon-containing materials fabricated with the aid of organic or mineral binder. Method of invention comprises breaking coal, binder, and catalyst (alkali metal salts) to particle size not larger than 100 μm, mixing them with water, briquetting, and drying briquettes. According to invention, coal is preliminarily baked under anaerobic conditions at temperature not exceeding 1000°C and liquid component is prepared by first mixing broken binder (5-25%) and catalyst (3-20%) with water (60-90%) and thus prepared mix is further mixed with crushed coal at weight ratio (60-90):(15-35). Fuel briquette itself is also disclosed containing 14-28% water, 3-8% binder reduced to particle size not larger than 100 μm, 1-5% catalyst, and baked coal. As a result, compression strength and resistance to abrasion of fuel briquettes are increased by 1.2 and 1.5 times, respectively.

EFFECT: increased strength of briquettes and achieved flameless burning thereof.

16 cl, 3 dwg, 10 ex

Fuel composition // 2280678

FIELD: fuel briquettes for domestic and industrial use in boiler houses and railway car furnaces.

SUBSTANCE: proposed fuel composition contains 20-65% of waste of leather production process; 10-30% of hydrocarbon sludge; 0-20% of wood waste; the remainder being peat. Hydrocarbon sludge contains up to 200 g/kg of petroleum products. Waste of leather production process is used in form of leather dust, leather cuttings and leather chips. Fuel composition may also include waste of wood-pulp and paper industry, weaving and sewing processes in the amount of up to 10 mass-%. Proposed fuel enhances utilization of sludge of car repair plants, engineering plants and other works containing up to 200 g/kg of petroleum products.

EFFECT: enhanced efficiency.

5 cl

FIELD: treatment of coal for reduction of sulfur dioxide emissions during burning of coal.

SUBSTANCE: coal at high content of sulfur is placed in low-pressure medium for cracking of part of coal by extraction of atmospheric fluids entrapped in coal. Then cracked coal is brought in contact with aqueous composition of colloidal silicon oxide oversaturated with calcium carbonate and larger part of aqueous composition is brought out of contact with coal, after which coal is acted on by high pressure in carbon dioxide medium during period of time sufficient for penetration of calcium carbide into cracks in coal. Description is also given for coal cracked in vacuum which contains about 0.5 wt-% of sulfur and additionally contains calcium carbonate deposited in cracks in coal in the amount sufficient for obtaining Ca:S molar ratio equal to at least 0.5. Specification contains also description of obtaining energy in the course of burning coal at high content of sulfur at simultaneous reduction of sulfur dioxide in emissions. Specification contains also description of increase of calcium sulfate obtained in the course of burning coal at high content of sulfur and aqueous composition used for treatment of such coal. Specification contains also description of preparation of aqueous composition for treatment of coal at high content of sulfur in combustion products. Description is also given for device for treatment of coal at pressure.

EFFECT: considerable reduction of sulfur dioxide and other toxic gases formed during burning of coal.

25 cl, 8 dwg, 3 ex

FIELD: fuel materials.

SUBSTANCE: invention relates to using ferrocene-containing catalytically active plasticizers in high-modulus solid-propellant composition for different designations possessing the enhanced exploitation stability and broadly regulated range of the combustion rate. The composition comprises the following components: 60-80 wt.-% of oxidizing agent, for example, ammonium and potassium nitrate or FPCh; 2-20% of aluminum; 5-15% of liquid carboxylate rubber; 1.5-3.5% of epoxy resin, for example, epoxydiane resin ED-20 or resin EC-N; 0.01-4% of liquid ferrocene compound; 0.5-3.5% of co-plasticizer, transformer oil and/or DBS; 0.05-0.5% of hardening accelerating agents, and 0.01-0.2% of surface-active substances. Method for preparing high-modulus solid-propellant composition of reduced volatility of liquid ferrocene compound involves preliminary dissolving the ferrocene compound in co-plasticizer in the mass ratio = (20-80):(1-99) followed by plasticizing a polymeric binding agent and its mixing with surface-active substance, aluminum, oxidizing agent and hardening accelerating agents. Invention provides enhancing the strength properties of the composition.

EFFECT: improved properties of compositions.

3 ex

FIELD: agriculture; chemical industry; other industries; methods of conditioning of the granulated fertilizers.

SUBSTANCE: the invention is pertaining to the technology of production of the mineralfertilizers with the improved physical properties slowly variable at transportations and storing. For mitigation of the blocking property of the fertilizers the granules after cooling are coated with the conditioning additivess in the separate apparatus. The method includes granulation of the pulp of ammonium phosphates, drying of the granules, their cooling with introduction at this stage by the sprinkling method of the liquid conditioning additives in the section with the temperature of the layer exceeding by 5-10°С the temperature of the being cooled product. The fluid additive is injected several times distributing it across the section of sprinkling in the form of drips with the varying dimensions. The dimension of the drips change within the limits of ddr/dgr equal to (0.05-0.15): 1). At that the dimension of the drips is increasing with the increase of the difference of the temperatures of the additive and the layer of the granules in the place of the injection. The temperature of the liquid additive is kept within the limits of 70-90°С. The treated granules of the fertilizer have obtained the qualitative coating reducing the blocking property of the fertilizer.

EFFECT: theinvention ensures, that the treated granules of the fertilizer have obtained the qualitative coating reducing the blocking property of the fertilizer.

2 cl, 2 ex

FIELD: chemical industry; methods of production of the granulated carbamide.

SUBSTANCE: the invention is pertaining to the field of chemical industry, in particular, to the method of production of the granulated carbamide and may be used at the enterprises of the nitrogen production branch of industry producing carbamide as fertilizers. The method of production of the granulated carbamide provides for the crystalline carbamide melting, introduction of the modifying agent into the melt of the carbamide and granulation. In the capacity of the modifying agent they use the sediment of magnesium-ammonium-phosphate produced at the sewage purification from ions of ammonium or from phosphate ions, which is introduced into the carbamide melt in the form of the water suspension the finely dispersed magnesium-ammonium-phosphate with the content of water including crystallization water, of no more than 14 kg per 1 ton of the carbamide melt or in the form of the dry finely dispersed magnesium-ammonium-phosphate in amount of 5 - 10 kg per 1 ton of the carbamide melt. The technical result of the invention is the increased strength of the carbamide granules at the simultaneous improvement of the agrochemical efficiency of the fertilizers.

EFFECT: the invention ensures the increased strength of the carbamide granules at the simultaneous improvement of the agrochemical efficiency of the fertilizers.

8 ex, 1 tbl

FIELD: manufacture of fertilizers; equipment for production of granulated carbamide.

SUBSTANCE: proposed method of production of granulated carbamide includes spraying its melt in granulation zone at contact with cooling air flow, hardening of drops of melt in free fall, treatment of granules with modifying agent- mixture of surfactant with film-forming agent in aqueous medium in the course of free fall at temperature of from 80 to 110°C and cooling of granules thus formed. Mixture is used in the amount of 0.01-0.16% of carbamide mass in terms of dry residual. Use may be made of ionogenic and nonionogenic agents. Film-forming agent may be selected from group containing amino-formaldehyde and epoxy resins, polyvinyl acetate and animal glues. Granulation tower has hollow housing with melt sprayer in upper part and apparatus for cooling the granules in fluidized layer in lower part, as well as injectors for spraying modifying agent which are located over circumference in lower part of tower above cooling apparatus.

EFFECT: enhanced strength of granules.

3 cl, 1 dwg, 10 ex

FIELD: inorganic substances technology.

SUBSTANCE: invention relates to production of granulated potassium sulfate appropriate for use in chemical industry for manufacturing mineral fertilizers and in agriculture as chlorine-free potassium-containing fertilizer. Process according to invention comprises spraying binding component onto dry potassium sulfate powder while simultaneously mixing materials in granulator mixer followed by drying thus formed granules to residual moisture not exceeding 1%. As binding component, liquid potassium soap or 50% solution thereof is used on the basis of 8 g binder per 100 g potassium sulfate. Once spraying of binding component ended, dry potassium sulfate is supplied through screw feeder to support growth of granules.

EFFECT: enabled production of granulated potassium sulfate in the form of non-caked and non-dusting product with stable granulometric composition and loose density, which contains high amount of basal substance (at least 51% K2O).

2 cl, 2 tbl

FIELD: mineral fertilizers.

SUBSTANCE: invention relates to granulated mineral fertilizers containing ammonium phosphates modified by surfactants and powdering substances, which do not lose their physicochemical properties during transportation and storage. Manufacture process comprises granulation of ammonium phosphate pulp, drying of granules, sorting and selection of commercial fraction, cooling and addition of modifying supplements. The latter are added in the cooling stage into zone with bed temperature by 5-10°C exceeding temperature of cooled product. Conditioning additives utilized can be either only liquid or the same mixed with dry powdering substances.

EFFECT: improved quality of surface coverage and simplified process.

2 cl, 3 ex

The invention relates to a process of granulation of materials of different nature, in particular to the granulation of peat and tomfooleries mixtures, fertilizer, chemical and other ultra-fine powders, carbon and mineral fibers, coal dust, animal feed, clay

The invention relates to the manufacture of pellets and can be used in the manufacture of pellets from raw materials based on wood particles

The invention relates to the field of hardening of products and batch preparation, in particular to the preparation of the charge in the scheme of acceptance of metallurgical raw materials and its delivery to the smelter in the form of granules, pellets or pelletized material

The invention relates to a method and apparatus for agglomeration of powders, in particular food products such as instant coffee, coffee substitutes, vegetable proteins, milk and similar milk products, and also dyes and agrochemicals
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