CN104557280A - Multi-layer sedimentation type coating and drying device and method for preparation of coated fertilizer - Google Patents
Multi-layer sedimentation type coating and drying device and method for preparation of coated fertilizer Download PDFInfo
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- CN104557280A CN104557280A CN201410812491.XA CN201410812491A CN104557280A CN 104557280 A CN104557280 A CN 104557280A CN 201410812491 A CN201410812491 A CN 201410812491A CN 104557280 A CN104557280 A CN 104557280A
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/30—Layered or coated, e.g. dust-preventing coatings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/133—Renewable energy sources, e.g. sunlight
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Abstract
The invention provides a multi-layer sedimentation type coating and drying device and method for preparation of a coated fertilizer and belongs to the technical field of agricultural fertilizer preparation. In a barrel inner cavity of the device, at least two layers of horizontally parallel trays are arranged in a coating fluidized bed section, at least one spray gun is arranged on each layer of trays in the section, and a conveying pipe is connected to the spray gun. At least two layers of horizontally parallel trays are arranged in the drying fluidized bed section. Each tray comprises a hollow column body and a hollow table body, a blanking hole is formed in the bottom wall of the hollow table body, a rotating plate for opening or closing the blanking hole is movably mounted at the lower part of the hollow table body, and a ventilation hole is formed in the rotating plate. In the method, coating and heating aftertreatment are continuously carried out, the fertilizer sequentially passes through the trays under the action of gravity and tray guide flow, and coating and drying treatment is finished. The device has the advantages that traditional batch type fluidized bed coating equipment is changed into multi-layer sedimentation type equipment, and the production efficiency is improved by three to ten times; meanwhile, the heat energy and the kinetic energy of wind are fully utilized, and energy consumption is reduced.
Description
Technical field
The invention belongs to agricultural fertilizer preparing technical field, particularly a kind of dressing drying unit preparing coated fertilizer, also relates to its method in addition.
Background technology
Coated fertilizer has plurality of advantages such as improving chemical fertilizer utilization ratio, minimizing environment-stress, lifting crops quality and saving fertilising cost, therefore uses the inevitable requirement that coated fertilizer is developing modern agriculture, the Implement of sustainable development strategy.Coated fertilizer for fertilizer parcel is a lot, and wherein aqueous-based polymers is that solvent, building-up process do not need organic solvent, finished product tasteless and easily degrade with water, is regarded as desirable environmentally friendly coated release-controlled material.
At present, the main fluidized-bed coating machine that adopts manufactures coated fertilizer both at home and abroad, although fluidized bed coating equipment comes out for many years, dressing principle relative maturity, still exists a lot of practical problems:
(1) first single machine production ability is little, and a collection of most multipotency of existing largest fluidized bed coating equipment produces 500 kilograms of coated fertilizers;
Secondly (2) coating efficiency is low, and existing fluidized bed coating equipment is all step dressing mode, and the whole dressing cycle generally maintains 2 ~ 4 hours, can with reference to patent of invention: 201010157448.6;
(3) when making water-based polymer coated fertilizer at present, also need to carry out heat drying aftertreatment to coated fertilizer after dressing completes, fully residual moisture in evaporation coating, extends the release period of coated fertilizer.Additionally independently adding heat treatment makes coating efficiency lower, and making a collection of coated fertilizer just needs 4 ~ 5 hours easily, seriously hinders the process of the popularization of coated fertilizer in market;
(4) also there is the low shortcoming of heat utilization rate in existing intermittent type seed-coating machine.During existing fluidized bed coating equipment dressing, outside air heats up through vapor heat exchanger, enters seed-coating machine king-tower with the form of hot blast, by thermal energy transfer to the fertilizer of dressing, is finally discharged by induced draft fan with air draft.This low residence time utilizes heat energy pattern easily to cause thermal waste.
Summary of the invention
The object of the invention is to solve above-mentioned the deficiencies in the prior art, the dressing drying unit providing a kind of multilayer sedimentation type to prepare coated fertilizer and method, this device repacks conventional batch fluidized bed coating equipment the equipment of multilayer sedimentation type into, enhance productivity, take full advantage of heat energy and the kinetic energy of wind simultaneously, reduce energy consumption.
The technical scheme that the present invention is adopted for achieving the above object is: a kind of multilayer sedimentation type prepares the dressing drying unit of coated fertilizer, comprise cylindrical shell, it is characterized in that: cylinder body bottom opening is fixed with cone bucket, spigot discharge is offered in cone bucket bottom, inner barrel is hollow lumen, offer Intaker controller bottom cylinder lateral wall, the just right cylinder lateral wall inner bottom part of Intaker controller is provided with the air deflector of guiding gas to cylindrical shell ionized motion;
Cylindrical shell top is installed with feeding unit and venting port, and venting port lower end is installed with dust collection;
Be divided into dressing fluidized-bed section in the middle part of cylinder lumen and dry fluidized-bed section, the tower tray of at least 2 layers of horizontal parallel is set in described dressing fluidized-bed section, and every layer of tower tray in this section arranges at least 1 spray gun, spray gun is connected with feeding tube; The tower tray of at least 2 layers of horizontal parallel is set in described oven dry fluidized-bed section;
Described tray level is fixedly installed on cylinder inboard wall, described tower tray comprises hollow cylinder and hollow stage body, its hollow core stage body is fixed on cylinder inboard wall, its inside is cavity, larger one end of hollow stage body opening up, and the outer wall of larger one end and cylinder inboard wall are tightly connected, its less one end is diapire, diapire has material falling hole, and material falling hole internal diameter is greater than the particle diameter of coated fertilizer feed particles; Hollow stage body lower removable is provided with for being opened or the rotor plate of closed material falling hole, rotor plate has ventilation hole, and ventilation hole internal diameter is less than and covers silk screen above the particle diameter of coated fertilizer feed particles or ventilation hole and screen diameter is less than the particle diameter of coated fertilizer feed particles; Hollow cylinder is guide cylinder, boring and upper and lower opening, and its up and down formula is installed on hollow stage body diapire, and spray gun is fixed on hollow stage body diapire, and the nozzle at spray gun top is positioned on hollow stage body diapire.
Described Intaker controller comprises air-supply arrangement, air speed control device, heating unit and temperature-control device, accesses heating unit after air-supply arrangement, and air-supply arrangement is connected with air speed control device, and heating unit is connected with temperature-control device; Described air-supply arrangement comprises blast inlet, loft drier, blower fan and air outlet, and blower fan both sides arrange blast inlet and air outlet, and air inlet is provided with loft drier.
Described feeding unit comprises opening for feed and feed distributor, and opening for feed is positioned at cylindrical shell top, and feed distributor is positioned at immediately below opening for feed; Cone bucket is provided with vision slit, and described cylindrical shell is also provided with manhole, and described hollow stage body is fixed on cylinder inboard wall by bracing frame.
The tower tray arranging horizontal parallel in described dressing fluidized-bed section is 2-50 layer, and the tower tray arranging horizontal parallel in described oven dry fluidized-bed section is 2-50 layer, and the distance between described every adjacent two layers tower tray is 0.3m-1.2m; Described cylinder internal diameter is 0.2-2.0m, the hollow stage body top external diameter 2-10cm less of cylinder internal diameter of described tower tray, and the ratio of its underpart external diameter and top external diameter is 1:2-5, and it is highly 1-0.2 times of top external diameter; The hollow cylinder external diameter of described tower tray is 3-5:1 with the ratio of hollow stage body lower outer diameter, and its height is 1-5:1 with the ratio of its external diameter.
Described rotor plate one end is movably installed in side, hollow stage body bottom by rotation axis, and its other end is connected to hollow stage body bottom opposite side by control lever, and control lever controls the rotation of rotor plate to open or to close the material falling hole of hollow stage body diapire.
Described rotation axis is the transverse axis parallel with hollow stage body diapire, and rotor plate vertically moves up and down the material falling hole opening or close hollow stage body diapire centered by transverse axis under the effect of control lever.
Described rotation axis is the Z-axis vertical with hollow stage body diapire, and rotor plate moves the material falling hole opening or close hollow stage body diapire in the horizontal direction centered by Z-axis under the effect of control lever.
The method of coated fertilizer prepared by the dressing drying unit that a kind of multilayer sedimentation type described in utilization prepares coated fertilizer, it is characterized in that: comprise the following steps:
(1) gas is passed into:
Open Intaker controller, pass into air, form the gas stablizing wind speed and temperature, under air deflector guides, gas is to cylindrical shell ionized motion;
(2) dressing:
A () closes the material falling hole of the hollow stage body diapire of every layer of tower tray of dressing fluidised bed zones section by rotor plate, the feed particles of coated fertilizer added from opening for feed, the feed particles added is one or more of urea, volatile salt, ammonium nitrate, ammonium sulfate, potassium sulfate, Repone K, saltpetre, Secondary ammonium phosphate, primary ammonium phosphate etc.; Can be straight fertilizer also can be composite fertilizer and the uniform inorganic mixed organic manure of granulation, open the spray gun on the first layer tower tray, start to spray dressing emulsion, the feed particles of coated fertilizer carries out fluidized motion under the effect of the gas that moves upward in tower tray, and by spraying dressing, spraying Coating times is 1-10 minute, completes the coating process of the first layer tower tray;
B () is in dressing fluidized-bed section, coating process from second layer tower tray is: after last layer tower tray coating process completes, the material falling hole bottom the hollow stage body of last layer tower tray is opened by rotor plate, coated fertilizer enters into this layer of tower tray by material falling hole, closed last layer tower tray material falling hole, last layer tower tray adds coated fertilizer feed particles, proceed coating process, spraying Coating times is 1-10 minute, open the spray gun on this layer of tower tray simultaneously, start to spray dressing emulsion, coated fertilizer carries out fluidized motion under the effect of the gas that moves upward in tower tray, and again sprayed dressing, spraying Coating times is 1-10 minute, complete the coating process of this layer of tower tray,
C (), in dressing fluidized-bed section, repeating step (b), completes dressing until coated fertilizer after all layer tower trays;
(3) dry:
(I) material falling hole bottom the hollow stage body of every layer of tower tray of drying fluidized-bed section is closed by rotor plate, coated fertilizer after dressing enters the first layer tower tray of drying fluidized-bed section, coated fertilizer dries 1-10 minute under hot air acting, completes the drying course of the first layer tower tray;
(II) in oven dry fluidized-bed section, drying course from second layer tower tray is: after last layer tower tray drying course completes, the material falling hole of the hollow stage body diapire of last layer tower tray is opened by rotor plate, coated fertilizer enters into this layer of tower tray by material falling hole, closed last layer tower tray material falling hole, last layer tower tray adds coated fertilizer, proceed drying course, drying time is 1-10 minute, in this layer simultaneously, coated fertilizer dries 1-10 minute under hot air acting, completes the drying course of this layer of tower tray;
(III) in oven dry fluidized-bed section, repeating step (II), fertilizer to be coated completes oven dry after all layer tower trays;
(4) collect:
Coated fertilizer after oven dry enters cone bucket, is collected by discharge opening.
In described step (1), Intaker controller passes into the wind speed 0.3-12m/s of air, and its temperature is 30-150 DEG C.
In described step (2), the feed particles of coated fertilizer is 10-100kg/min from the speed that opening for feed adds; Open spray gun in described step (2), start to spray dressing emulsion, arranging Emulsion Spraying speed is 1-30kg/min.
The beneficial effect that the present invention obtains is:
(1) matter of time continuing dressing in conventional batch fluidized bed coating equipment is converted to the space problem of segmentation, multiple-unit, successively fluidization dressing by this device, achieves the process of multilayer sedimentation;
(2) this device achieves simultaneously and is integrated in the dressing drying tower of striping order fluidisation by the heat drying process of dressing later stage, make dressing and add heat treatment to carry out continuously, coated fertilizer is from tower top endfeed, successively by each tower tray under the effect of gravity and tower tray guiding air-flow, complete dressing and drying and processing, bottom dressing drying tower, enter packaging system, realize the continuous operation of whole dressing stoving process;
(3) this device and method realizes the production of coated fertilizer continuous coating, fertilizer is about 30-80 minute from the cycle being fed to discharging, and multilayer tower tray can carry out spraying dressing and drying and processing simultaneously, production cycle 4-5 hour traditional before comparing, improve coated fertilizer production efficiency 3-10 doubly, single machine production ability significantly improves;
(4) this device and method achieves the cascade utilization of gas heat energy and kinetic energy, reduces energy consumption.Coated fertilizer make use of the kinetic energy of gas in the dressing stage, coated fertilizer fluidized is moved, complete coating process, drying section is entered after the fertilizer coating flowing through dressing fluidisation section terminates, coated fertilizer is under the hot air acting of adverse current from bottom to top, and in fertilizer coating, residual moisture can realize controlled oven dry, and the heat energy that make use of gas in this process is dried, achieve the utilization of heat energy and kinetic energy simultaneously, reduce energy consumption.
Accompanying drawing explanation
Fig. 1 is the dressing drying unit structure schematic front view that a kind of multilayer sedimentation type prepares coated fertilizer.
Fig. 2 is the structural representation of tower tray and spray gun in Fig. 1.
In figure: 1, spigot discharge, 2, cone bucket, 3, vision slit, 4, air deflector, 5, manhole, 6, spray gun, 7, cylindrical shell, 8, feed distributor, 9, opening for feed, 10, venting port, 11, dust collection, 12, tower tray, 13, Intaker controller, 14, bracing frame, 15, rotor plate, 16, hollow cylinder, 17, hollow stage body, 18, material falling hole, 19, rotation axis, 20, control lever, 21, ventilation hole, 22, feeding tube
Embodiment
Describe the present invention in detail below in conjunction with specific embodiment and accompanying drawing, but the present invention is not limited to specific embodiment.
Embodiment 1
A kind of multilayer sedimentation type as shown in accompanying drawing 1,2 prepares the dressing drying unit of coated fertilizer, comprise cylindrical shell 7, cylinder body bottom opening is fixed with cone bucket 2, spigot discharge 1 is offered in cone bucket bottom, inner barrel is hollow lumen, offer Intaker controller 13 bottom cylinder lateral wall, the just right cylinder lateral wall inner bottom part of Intaker controller is provided with the air deflector 4 of guiding gas to cylindrical shell ionized motion; Intaker controller comprises air-supply arrangement, air speed control device, heating unit and temperature-control device, heating unit is accessed after air-supply arrangement, air-supply arrangement is connected with air speed control device, for regulating wind speed and air pressure, heating unit is connected with temperature-control device, regulates the temperature entering the gas of cylindrical shell; Air-supply arrangement comprises blast inlet, loft drier, blower fan and air outlet, and blower fan both sides arrange blast inlet and air outlet, and air inlet is provided with loft drier, guarantees the dry air entered in cylindrical shell.Cone bucket being provided with vision slit, for observing the fluidisation situation of cylindrical shell inner investment fertilizer, cylindrical shell being also provided with manhole 5, for operations such as workman's installation parts and maintenances.
Cylindrical shell top is installed with feeding unit and venting port, and venting port 10 lower end is installed with dust collection 11, and feeding unit comprises opening for feed 9 and feed distributor 8, and opening for feed is positioned at cylindrical shell top, and feed distributor is positioned at immediately below opening for feed.
Be divided into dressing fluidized-bed section in the middle part of cylinder lumen and dry fluidized-bed section, the tower tray 12 of 2 layers of horizontal parallel is set in dressing fluidized-bed section, and every layer of tower tray in this section arranges 1 spray gun 6, spray gun being connected with feeding tube 22; Dry the tower tray that 2 layers of horizontal parallel are set in fluidized-bed section;
Tower tray is fixedly installed on cylinder inboard wall by bracing frame 14 level, tower tray comprises hollow cylinder 16 and hollow stage body 17, the material of this hollow cylinder and hollow stage body is stainless steel, hollow stage body is fixed on cylinder inboard wall, and its inside is cavity, larger one end of hollow stage body opening up, and the outer wall of larger one end and cylinder inboard wall are tightly connected, its less one end is diapire, diapire has material falling hole 18, and material falling hole internal diameter is greater than the particle diameter of coated fertilizer feed particles; Hollow stage body lower removable is provided with for opening or the rotor plate 15 of closed material falling hole, and rotor plate has ventilation hole 21, ventilation hole internal diameter is less than the particle diameter of coated fertilizer feed particles; Hollow cylinder is guide cylinder, boring and upper and lower opening, and its up and down formula is installed on hollow stage body diapire, and spray gun is fixed on hollow stage body diapire, and the nozzle at spray gun top is positioned on hollow stage body diapire.
Distance between every adjacent two layers tower tray is 1.2m; Cylinder internal diameter is 2.0m, the hollow stage body top external diameter 10cm less of cylinder internal diameter of tower tray, and the ratio of its underpart external diameter and top external diameter is 1:2, and it is highly 0.5 times of top external diameter; The hollow cylinder external diameter of described tower tray is 3:1 with the ratio of hollow stage body lower outer diameter, and its height is 4:1 with the ratio of its external diameter.
Rotor plate one end is movably installed in side, hollow stage body bottom by rotation axis 19, and its other end is connected to hollow stage body bottom opposite side by control lever 20, and control lever controls the rotation of rotor plate to open or to close the material falling hole of hollow stage body diapire.Rotation axis is the transverse axis parallel with hollow stage body diapire, and rotor plate vertically moves up and down the material falling hole opening or close hollow stage body diapire centered by transverse axis under the effect of control lever.
This device can also arrange tail gas absorption, impurity removed system, and this system is mainly used in removing the coating liquid that produces in the gaseous substance and dressing drying course that manure digestion produces and solidifies chip and fertilizer fragmentation bits.Tail gas needs before entering cyclonic separator to complete the processes such as deamination, desulfurization, decarburization by absorption liquid, and the impurity such as the drop that this process produces and the chip that gas phase is carried are completed by efficient cyclone separator, rear discharge up to standard.
Embodiment 2
This embodiment is identical with the structure of embodiment 1 device, its different content and correlation parameter as follows:
(1) tower tray 12 of 10 layers of horizontal parallel is set in dressing fluidized-bed section, and every layer of tower tray in this section arranges 2 spray guns 6, spray gun is connected with feeding tube 22; Dry the tower tray that 6 layers of horizontal parallel are set in fluidized-bed section;
(2) hollow stage body lower removable is provided with for opening or the rotor plate 15 of closed material falling hole, rotor plate has ventilation hole 21, covers silk screen and screen diameter is less than the particle diameter of coated fertilizer feed particles above ventilation hole;
(3) distance between every adjacent two layers tower tray is 0.8m; Cylinder internal diameter is 1.6m, the hollow stage body top external diameter 6cm less of cylinder internal diameter of tower tray, and the ratio of its underpart external diameter and top external diameter is 1:3, and it is highly 1 times of top external diameter; The hollow cylinder external diameter of described tower tray is 4:1 with the ratio of hollow stage body lower outer diameter, and its height is 1:1 with the ratio of its external diameter.
(4) rotation axis is the Z-axis vertical with hollow stage body diapire, and rotor plate moves the material falling hole opening or close hollow stage body diapire in the horizontal direction centered by Z-axis under the effect of control lever.
Embodiment 3
This embodiment is identical with the structure of embodiment 1 device, its different content and correlation parameter as follows:
(1) tower tray 12 of 25 layers of horizontal parallel is set in dressing fluidized-bed section, and every layer of tower tray in this section arranges 4 spray guns 6, spray gun is connected with feeding tube 22; Dry the tower tray that 30 layers of horizontal parallel are set in fluidized-bed section;
(2) distance between every adjacent two layers tower tray is 0.6m; Cylinder internal diameter is 0.8m, the hollow stage body top external diameter 4cm less of cylinder internal diameter of tower tray, and the ratio of its underpart external diameter and top external diameter is 1:4, and it is highly 0.8 times of top external diameter; The hollow cylinder external diameter of described tower tray is 5:1 with the ratio of hollow stage body lower outer diameter, and its height is 3:1 with the ratio of its external diameter.
(3) rotation axis is the Z-axis vertical with hollow stage body diapire, and rotor plate moves the material falling hole opening or close hollow stage body diapire in the horizontal direction centered by Z-axis under the effect of control lever.
Embodiment 4
This embodiment is identical with the structure of embodiment 1 device, its different content and correlation parameter as follows:
(1) tower tray 12 of 50 layers of horizontal parallel is set in dressing fluidized-bed section, and every layer of tower tray in this section arranges 5 spray guns 6, spray gun is connected with feeding tube 22; Dry the tower tray that 50 layers of horizontal parallel are set in fluidized-bed section;
(2) hollow stage body lower removable is provided with for opening or the rotor plate 15 of closed material falling hole, rotor plate has ventilation hole 21, covers silk screen and screen diameter is less than the particle diameter of coated fertilizer feed particles above ventilation hole;
(3) distance between every adjacent two layers tower tray is 0.3m; Cylinder internal diameter is 0.2m, the hollow stage body top external diameter 2cm less of cylinder internal diameter of tower tray, and the ratio of its underpart external diameter and top external diameter is 1:5, and it is highly 0.2 times of top external diameter; The hollow cylinder external diameter of described tower tray is 3:1 with the ratio of hollow stage body lower outer diameter, and its height is 5:1 with the ratio of its external diameter.
Embodiment 5
The method of coated fertilizer prepared by the dressing drying unit utilizing a kind of continuous sedimentation type described in embodiment 1 to prepare coated fertilizer, it is characterized in that: comprise the following steps:
(1) gas is passed into:
Open Intaker controller, pass into air, form the gas stablizing wind speed and temperature, wind speed 0.3m/s, its temperature is 30 DEG C, and under air deflector guides, gas is to cylindrical shell ionized motion;
(2) dressing:
A () closes the material falling hole of the hollow stage body diapire of every layer of tower tray of dressing fluidised bed zones section by rotor plate, the feed particles of coated fertilizer is added from opening for feed, the speed added is 10kg/min, open the spray gun on the first layer tower tray, start to spray dressing emulsion, arranging Emulsion Spraying speed is 1kg/min.The feed particles of coated fertilizer carries out fluidized motion under the effect of the gas that moves upward in tower tray, and by spraying dressing, spraying Coating times is 10 minutes, completes the coating process of the first layer tower tray;
B () is in dressing fluidized-bed section, coating process from second layer tower tray is: after last layer tower tray coating process completes, the material falling hole bottom the hollow stage body of last layer tower tray is opened by rotor plate, coated fertilizer enters into this layer of tower tray by material falling hole, closed last layer tower tray material falling hole, last layer tower tray adds coated fertilizer feed particles, proceed coating process, spraying Coating times is 10 minutes, open the spray gun on this layer of tower tray simultaneously, start to spray dressing emulsion, coated fertilizer carries out fluidized motion under the effect of the gas that moves upward in tower tray, and again sprayed dressing, spraying Coating times is 10 minutes, complete the coating process of this layer of tower tray,
C (), in dressing fluidized-bed section, repeating step (b), completes dressing until coated fertilizer after all layer tower trays;
(3) dry:
(I) material falling hole bottom the hollow stage body of every layer of tower tray of drying fluidized-bed section is closed by rotor plate, coated fertilizer after dressing enters the first layer tower tray of drying fluidized-bed section, coated fertilizer is dried 10 minutes under hot air acting, completes the drying course of the first layer tower tray;
(II) in oven dry fluidized-bed section, drying course from second layer tower tray is: after last layer tower tray drying course completes, the material falling hole of the hollow stage body diapire of last layer tower tray is opened by rotor plate, coated fertilizer enters into this layer of tower tray by material falling hole, closed last layer tower tray material falling hole, last layer tower tray adds coated fertilizer, proceed drying course, drying time is 10 minutes, in this layer simultaneously, coated fertilizer is dried 10 minutes under hot air acting, completes the drying course of this layer of tower tray;
(III) in oven dry fluidized-bed section, repeating step (II), fertilizer to be coated completes oven dry after all layer tower trays;
(4) collect:
Coated fertilizer after oven dry enters cone bucket, is collected by discharge opening.
Embodiment 6
The method of coated fertilizer prepared by the dressing drying unit utilizing a kind of continuous sedimentation type described in embodiment 3 to prepare coated fertilizer, it is characterized in that: comprise the following steps:
(1) gas is passed into:
Open Intaker controller, pass into air, form the gas stablizing wind speed and temperature, wind speed 7m/s, its temperature is 90 DEG C, and under air deflector guides, gas is to cylindrical shell ionized motion;
(2) dressing:
A () closes the material falling hole of the hollow stage body diapire of every layer of tower tray of dressing fluidised bed zones section by rotor plate, the feed particles of coated fertilizer is added from opening for feed, the speed added is 68kg/min, open the spray gun on the first layer tower tray, start to spray dressing emulsion, arranging Emulsion Spraying speed is 23kg/min.The feed particles of coated fertilizer carries out fluidized motion under the effect of the gas that moves upward in tower tray, and by spraying dressing, spraying Coating times is 2 minutes, completes the coating process of the first layer tower tray;
B () is in dressing fluidized-bed section, coating process from second layer tower tray is: after last layer tower tray coating process completes, the material falling hole bottom the hollow stage body of last layer tower tray is opened by rotor plate, coated fertilizer enters into this layer of tower tray by material falling hole, closed last layer tower tray material falling hole, last layer tower tray adds coated fertilizer feed particles, proceed coating process, spraying Coating times is 2 minutes, open the spray gun on this layer of tower tray simultaneously, start to spray dressing emulsion, coated fertilizer carries out fluidized motion under the effect of the gas that moves upward in tower tray, and again sprayed dressing, spraying Coating times is 2 minutes, complete the coating process of this layer of tower tray,
C (), in dressing fluidized-bed section, repeating step (b), completes dressing until coated fertilizer after all layer tower trays;
(3) dry:
(I) material falling hole bottom the hollow stage body of every layer of tower tray of drying fluidized-bed section is closed by rotor plate, coated fertilizer after dressing enters the first layer tower tray of drying fluidized-bed section, coated fertilizer is dried 3 minutes under hot air acting, completes the drying course of the first layer tower tray;
(II) in oven dry fluidized-bed section, drying course from second layer tower tray is: after last layer tower tray drying course completes, the material falling hole of the hollow stage body diapire of last layer tower tray is opened by rotor plate, coated fertilizer enters into this layer of tower tray by material falling hole, closed last layer tower tray material falling hole, last layer tower tray adds coated fertilizer, proceed drying course, drying time is 3 minutes, in this layer simultaneously, coated fertilizer is dried 3 minutes under hot air acting, completes the drying course of this layer of tower tray;
(III) in oven dry fluidized-bed section, repeating step (II), fertilizer to be coated completes oven dry after all layer tower trays;
(4) collect:
Coated fertilizer after oven dry enters cone bucket, is collected by discharge opening.
Embodiment 7
The method of coated fertilizer prepared by the dressing drying unit utilizing a kind of continuous sedimentation type described in embodiment 4 to prepare coated fertilizer, it is characterized in that: comprise the following steps:
(1) gas is passed into:
Open Intaker controller, pass into air, form the gas stablizing wind speed and temperature, wind speed 12m/s, its temperature is 150 DEG C, and under air deflector guides, gas is to cylindrical shell ionized motion;
(2) dressing:
A () closes the material falling hole of the hollow stage body diapire of every layer of tower tray of dressing fluidised bed zones section by rotor plate, the feed particles of coated fertilizer is added from opening for feed, the speed added is 100kg/min, open the spray gun on the first layer tower tray, start to spray dressing emulsion, arranging Emulsion Spraying speed is 30kg/min.The feed particles of coated fertilizer carries out fluidized motion under the effect of the gas that moves upward in tower tray, and by spraying dressing, spraying Coating times is 1 minute, completes the coating process of the first layer tower tray;
B () is in dressing fluidized-bed section, coating process from second layer tower tray is: after last layer tower tray coating process completes, the material falling hole bottom the hollow stage body of last layer tower tray is opened by rotor plate, coated fertilizer enters into this layer of tower tray by material falling hole, closed last layer tower tray material falling hole, last layer tower tray adds coated fertilizer feed particles, proceed coating process, spraying Coating times is 1 minute, open the spray gun on this layer of tower tray simultaneously, start to spray dressing emulsion, coated fertilizer carries out fluidized motion under the effect of the gas that moves upward in tower tray, and again sprayed dressing, spraying Coating times is 1 minute, complete the coating process of this layer of tower tray,
C (), in dressing fluidized-bed section, repeating step (b), completes dressing until coated fertilizer after all layer tower trays;
(3) dry:
(I) material falling hole bottom the hollow stage body of every layer of tower tray of drying fluidized-bed section is closed by rotor plate, coated fertilizer after dressing enters the first layer tower tray of drying fluidized-bed section, coated fertilizer is dried 1 minute under hot air acting, completes the drying course of the first layer tower tray;
(II) in oven dry fluidized-bed section, drying course from second layer tower tray is: after last layer tower tray drying course completes, the material falling hole of the hollow stage body diapire of last layer tower tray is opened by rotor plate, coated fertilizer enters into this layer of tower tray by material falling hole, closed last layer tower tray material falling hole, last layer tower tray adds coated fertilizer, proceed drying course, drying time is 1 minute, in this layer simultaneously, coated fertilizer is dried 1 minute under hot air acting, completes the drying course of this layer of tower tray;
(III) in oven dry fluidized-bed section, repeating step (II), fertilizer to be coated completes oven dry after all layer tower trays;
(4) collect:
Coated fertilizer after oven dry enters cone bucket, is collected by discharge opening.
Claims (10)
1. a multilayer sedimentation type prepares the dressing drying unit of coated fertilizer, comprise cylindrical shell (7), it is characterized in that: cylinder body bottom opening is fixed with cone bucket (2), spigot discharge (1) is offered in cone bucket bottom, inner barrel is hollow lumen, offer Intaker controller (13) bottom cylinder lateral wall, the just right cylinder lateral wall inner bottom part of Intaker controller is provided with the air deflector (4) of guiding gas to cylindrical shell ionized motion;
Cylindrical shell top is installed with feeding unit and venting port, and venting port (10) lower end is installed with dust collection (11);
Be divided into dressing fluidized-bed section in the middle part of cylinder lumen and dry fluidized-bed section, the tower tray (12) of at least 2 layers of horizontal parallel is set in described dressing fluidized-bed section, and every layer of tower tray in this section arranges at least 1 spray gun (6), spray gun is connected with feeding tube (22); The tower tray (12) of at least 2 layers of horizontal parallel is set in described oven dry fluidized-bed section;
Described tower tray (12) level is fixedly installed on cylinder inboard wall, described tower tray comprises hollow cylinder (16) and hollow stage body (17), its hollow core stage body is fixed on cylinder inboard wall, its inside is cavity, larger one end of hollow stage body opening up, and the outer wall of larger one end and cylinder inboard wall are tightly connected, its less one end is diapire, diapire has material falling hole (18), material falling hole internal diameter is greater than the particle diameter of coated fertilizer feed particles; Hollow stage body lower removable is provided with for being opened or the rotor plate (15) of closed material falling hole, rotor plate has ventilation hole (21), ventilation hole internal diameter is less than and covers silk screen above the particle diameter of coated fertilizer feed particles or ventilation hole and screen diameter is less than the particle diameter of coated fertilizer feed particles; Hollow cylinder is guide cylinder, boring and upper and lower opening, and its up and down formula is installed on hollow stage body diapire, and spray gun is fixed on hollow stage body diapire, and the nozzle at spray gun top is positioned on hollow stage body diapire.
2. a kind of multilayer sedimentation type according to claim 1 prepares the dressing drying unit of coated fertilizer, it is characterized in that: described Intaker controller comprises air-supply arrangement, air speed control device, heating unit and temperature-control device, heating unit is accessed after air-supply arrangement, air-supply arrangement is connected with air speed control device, and heating unit is connected with temperature-control device; Described air-supply arrangement comprises blast inlet, loft drier, blower fan and air outlet, and blower fan both sides arrange blast inlet and air outlet, and air inlet is provided with loft drier.
3. a kind of multilayer sedimentation type according to claim 1 prepares the dressing drying unit of coated fertilizer, it is characterized in that: described feeding unit comprises opening for feed (9) and feed distributor (8), opening for feed is positioned at cylindrical shell top, and feed distributor is positioned at immediately below opening for feed; Cone bucket is provided with vision slit (3), and described cylindrical shell is also provided with manhole (5), described hollow stage body (17) is fixed on cylinder inboard wall by bracing frame (14).
4. a kind of multilayer sedimentation type according to claim 1 prepares the dressing drying unit of coated fertilizer, it is characterized in that: the tower tray arranging horizontal parallel in described dressing fluidized-bed section is 2-50 layer, the tower tray arranging horizontal parallel in described oven dry fluidized-bed section is 2-50 layer, and the distance between described every adjacent two layers tower tray is 0.3m-1.2m; Described cylinder internal diameter is 0.2-2.0m, the hollow stage body top external diameter 2-10cm less of cylinder internal diameter of described tower tray, and the ratio of its underpart external diameter and top external diameter is 1:2-5, and it is highly 1-0.2 times of top external diameter; The hollow cylinder external diameter of described tower tray is 3-5:1 with the ratio of hollow stage body lower outer diameter, and its height is 1-5:1 with the ratio of its external diameter.
5. a kind of multilayer sedimentation type according to claim 1 prepares the dressing drying unit of coated fertilizer, it is characterized in that: described rotor plate one end is movably installed in side, hollow stage body bottom by rotation axis (19), its the other end is connected to hollow stage body bottom opposite side by control lever (20), and control lever controls the rotation of rotor plate to open or to close the material falling hole of hollow stage body diapire.
6. a kind of multilayer sedimentation type according to claim 5 prepares the dressing drying unit of coated fertilizer, it is characterized in that: described rotation axis is the transverse axis parallel with hollow stage body diapire, rotor plate vertically moves up and down the material falling hole opening or close hollow stage body diapire centered by transverse axis under the effect of control lever.
7. a kind of multilayer sedimentation type according to claim 5 prepares the dressing drying unit of coated fertilizer, it is characterized in that: described rotation axis is the Z-axis vertical with hollow stage body diapire, rotor plate moves the material falling hole opening or close hollow stage body diapire in the horizontal direction centered by Z-axis under the effect of control lever.
8. the method for coated fertilizer prepared by the dressing drying unit utilizing a kind of multilayer sedimentation type described in claim 1 to prepare coated fertilizer, it is characterized in that: comprise the following steps:
(1) gas is passed into:
Open Intaker controller, pass into air, form the gas stablizing wind speed and temperature, under air deflector guides, gas is to cylindrical shell ionized motion;
(2) dressing:
A () closes the material falling hole of the hollow stage body diapire of every layer of tower tray of dressing fluidised bed zones section by rotor plate, the feed particles of coated fertilizer is added from opening for feed, open the spray gun on the first layer tower tray, start to spray dressing emulsion, the feed particles of coated fertilizer carries out fluidized motion under the effect of the gas that moves upward in tower tray, and by spraying dressing, spraying Coating times is 1-10 minute, completes the coating process of the first layer tower tray;
B () is in dressing fluidized-bed section, coating process from second layer tower tray is: after last layer tower tray coating process completes, the material falling hole bottom the hollow stage body of last layer tower tray is opened by rotor plate, coated fertilizer enters into this layer of tower tray by material falling hole, closed last layer tower tray material falling hole, last layer tower tray adds coated fertilizer feed particles, proceed coating process, spraying Coating times is 1-10 minute, open the spray gun on this layer of tower tray simultaneously, start to spray dressing emulsion, coated fertilizer carries out fluidized motion under the effect of the gas that moves upward in tower tray, and again sprayed dressing, spraying Coating times is 1-10 minute, complete the coating process of this layer of tower tray,
C (), in dressing fluidized-bed section, repeating step (b), completes dressing until coated fertilizer after all layer tower trays;
(3) dry:
(I) material falling hole bottom the hollow stage body of every layer of tower tray of drying fluidized-bed section is closed by rotor plate, coated fertilizer after dressing enters the first layer tower tray of drying fluidized-bed section, coated fertilizer dries 1-10 minute under hot air acting, completes the drying course of the first layer tower tray;
(II) in oven dry fluidized-bed section, drying course from second layer tower tray is: after last layer tower tray drying course completes, the material falling hole of the hollow stage body diapire of last layer tower tray is opened by rotor plate, coated fertilizer enters into this layer of tower tray by material falling hole, closed last layer tower tray material falling hole, last layer tower tray adds coated fertilizer, proceed drying course, drying time is 1-10 minute, in this layer simultaneously, coated fertilizer dries 1-10 minute under hot air acting, completes the drying course of this layer of tower tray;
(III) in oven dry fluidized-bed section, repeating step (II), fertilizer to be coated completes oven dry after all layer tower trays;
(4) collect:
Coated fertilizer after oven dry enters cone bucket, is collected by discharge opening.
9. the dressing furnace drying method of coated fertilizer prepared by a kind of continuous sedimentation type according to claim 8, it is characterized in that: in described step (1), Intaker controller passes into the wind speed 0.3-12m/s of air, and its temperature is 30-150 DEG C.
10. the dressing furnace drying method of coated fertilizer prepared by a kind of continuous sedimentation type according to claim 8, it is characterized in that: in described step (2), the feed particles of coated fertilizer is 10-100kg/min from the speed that opening for feed adds; Open spray gun in described step (2), start to spray dressing emulsion, arranging Emulsion Spraying speed is 1-30kg/min.
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Effective date of registration: 20191115 Address after: 215600 A 207 room A building center of Zhangjiagang Free Trade Zone, Suzhou Free Trade Zone, Jiangsu Patentee after: Zhangjiagang Institute of industrial technology, Dalian Institute of Chemical Physics, China Academy of Sciences Address before: 225100, No. 217, West Development Road, Hanjiang Economic Development Zone, Jiangsu, Yangzhou Patentee before: Yangzhou Lei Ou Electrical And Electronics Ltd. |