CN101125283A - Rotary drum fluid-bed heat-converter granulating method and device - Google Patents
Rotary drum fluid-bed heat-converter granulating method and device Download PDFInfo
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- CN101125283A CN101125283A CNA2007101229501A CN200710122950A CN101125283A CN 101125283 A CN101125283 A CN 101125283A CN A2007101229501 A CNA2007101229501 A CN A2007101229501A CN 200710122950 A CN200710122950 A CN 200710122950A CN 101125283 A CN101125283 A CN 101125283A
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Abstract
The present invention relates to a revolving drum fluidized bed heat exchanger granulation method and device, belonging to the field of the chemical industry agglomeration technique, which is characterized in that a fold shoveling plates are equably distributed on the internal wall of the revolving drum, a dead fluidized bed, a heat exchanger and a seed crystal particle are continuously put in revolving drum from the feeding end of the revolving drum, the particle is shoved into the fluidized bed by the shovelling plate, and dropped from the overflow opening, forming a seriate and even feed curtain, a plurality of nozzles are arranged at the lateral of the revolving drum which is orthogonally oriented with the feed curtain; the nozzle facilitates the raw material of the granulation to be liquefied and atomized into the liquid droplet, spraying to the feed curtain, the liquid droplet and the movable particle are connected by colliding, coating and solidifying at the surfaces of the particles, the increscent particle drops into the heat exchanger, after heat exchangement, dropping into the bottom of the revolving drum, shoveled into the fluidized bed again, repeating the above process. In the moving process from the feeding end to the reclaiming end, the particle has a plurality of circulations of cooling(drying), coating, solidifying, cooling(heating), the particle diameter slowly enlarges, draining away from the reclaiming end, by the process of sieving and cooling, getting the acceptable product. The undersized particles returns to the revolving drum to palletize again. The present invention has the advantages of low capital investment, low energy consumption, convenient operation, good product quality and high efficiency.
Description
Technical field
Rotary drum fluid-bed heat-converter granulating method and device belong to chemical industry granulating technique field.
Background technology
Granulating technique is widely used in fields such as chemical industry, medicine, material, mining industry, building materials, the particularly granulation of chemical fertilizer, industrial chemicals and product, and the grain products that needs preparation certain particle size, intensity, pattern, structure and component to require is enhanced product performance.
Causing grain with the urea in the chemical fertilizer is example, generally all adopts granulation tower, urea melting liquid to add and is sent to top of tower, by prilling spry liquation is sprayed into drop, drop is unrestrained from cat head, cooling curing in dropping process, and there is following major defect in this technology: 1, environmental pollution is serious.Dust content is too high in the air, works the mischief to surrounding environment.2, granule strength is low, is easy to cracked in the packed and transported process and the generation dust.3, restraining factors are more.Be subjected to seasonal effect bigger, limited by the tower height degree.
Adopt the granular urea production technology that coats the design of granulation principle, can overcome spray column granulating technique shortcoming.The existing granulating technique existence shortcoming in various degree that coats, on the one hand.Because particle air-teturning mixed phenomenon in fluid bed is remarkable, particle size distribution is wide, and large granule is more, needs increase equipment and power input.On the other hand, the bed of fluid bed class granulation is higher, needs higher fluidization air pressure, causes higher energy consumption.
Summary of the invention
The object of the present invention is to provide a kind of reduced investment, energy consumption is low, rotary drum fluid-bed heat-converter granulating method that good product quality efficient is high and device.
The rotary drum fluid-bed heat-converter granulating method that the present invention proposes is characterised in that: when rotary drum rotates, the fold-type flight that the crystal seed that adds from rotary drum one end is distributed in the rotary drum inboard is copied and is arranged on fixed fluidized bed in the rotary drum, evenly distribute with multihole distributor that side plate links to each other on, and side plate is higher than multihole distributor (150-500) mm, fluidized gas enters from the air chamber bottom the multihole distributor to be cooled off with dry seed particles, promoting seed particles simultaneously is the multihole distributor of (0-5) ° along the angle with the axial horizontal plane of rotary drum, process is the flash mouth of (0-250) mm highly, seed particles evenly falls to forming the material curtain through tripper, granulating raw material liquid sprays to the material curtain after nozzle atomization, drop is contacted with the collision of seed curtain, coat on the surface, solidify, the material curtain is fallen on the foraminous conveyer, fall again by the particle of foraminous conveyer and to carry out heat exchange on the heat exchanger, falling the bottom of the drum after the heat exchange is copied into fluid bed by the fold-type flight again, through so repeatedly circulation, grain diameter is increased continuously.
Wherein, described tripper can be one or more.
Described material liquid pipe can be one or more, and the nozzle on the material liquid pipe is located at material curtain one side position or two side positions spray to the material curtain with material liquid.
Described heat exchanger is a plate type heat exchanger, can be one or more layers and be (30-90) ° perpendicular to the inclination angle of the axial horizontal plane of rotary drum.
Described heat exchanger can be contained in the fluid bed top and also can be contained in the fluid bed below or heat exchanger all is housed up and down.
Described heat exchanger is provided with foraminous conveyer, and the foraminous conveyer aperture is (10-100) mm, limits caking and enters heat exchanger with foreign matter, makes it to be transported to outside the rotary drum.
Described material curtain direction is led by the fixed guide plate, and thickness is realized by the tripper rocker that is arranged on the flash mouth.
When described fusing urea pipe is many and the rotary drum shaft core position nearest one and farthest one be provided with baffle plate, block the urea droplets that sprays to flight and fluid bed, heater or vibrating device are arranged on the baffle plate.
Pneumatic conveyer or bucket elevator are equipped with in position, described rotary drum one or both sides, falling outer dust of rotary drum and particle transport to separator, separator below stream pipe apart from the place ahead (100-200) mm, increases fine particle fast, alleviates pressure recovery.
Rotary drum fluid-bed heat-converter granulating method of the present invention and device are characterised in that: the seed curtain that goes out fluid bed can be one deck, also can be multilayer, and every layered material curtain can be that single or double is subjected to the nozzles spray material liquid; Crystal seed can in time be cooled off by heat exchanger, improves the material liquid straying quatity; Foraminous conveyer has blocked caking and foreign matter avoids causing parking; Strength is carried having reduced equipment input and Dust Capacity recovery in dust and the granule conveying revolution drum.
Further describe the present invention below in conjunction with accompanying drawing.
Fig. 1, be the transverse sectional view of rotary drum fluid-bed heat-converter granulating device.
Fig. 2, be the longitudinal sectional view of rotary drum fluid-bed heat-converter granulating device.
Fig. 3, be the material curtain tripper enlarged drawing of rotary drum fluid-bed heat-converter granulating device.
Wherein, label 1 is a granulating rotating drum, and 2 is flight, 3 is fluid bed, and 4 is the fluid bed blast pipe, and 5 is the fluid bed baffle plate, 6 are material curtain baffle plate, and 7 is tripper, and 8 is multihole distributor, 9 is nozzle, and 10 is foraminous conveyer, and 11 is the foraminous conveyer motor, 12 is heat exchanger, and 13 is refeed line, and 15 is induced duct, 16 are the strength conveying, and 17 are the transmission gear ring, and 18 is support roller, 19 is the molten urea solution pipe, and 20 is discharging opening, and 21 is the tripper rocker, 22 is baffle plate, and 23 is heat exchanger medium entrance, and 14 are the heat exchanger media outlet, 24 is separator, 25 is pneumatic carrier, and 26 are separator stream pipe, and 27 is separator gas phase pipe.
As shown in Figure 1, fluidization air is sent on the fluid bed 3 through porous branch plate 8 from fluid bed 3 bottom air inlet pipes 4, plays urea granules cooling and fluidization.Urea granules is divided into one or more layers material curtain through the flash mouth by tripper 7 under fluidized gas promotes, material curtain thickness is regulated by tripper rocker 21, be provided with nozzle 9 at material curtain two side positions, fusing urea fusing urea pipe 19 in Fig. 2 is being expected on the curtain surface through nozzle 9 atomized spray, urea granules is constantly grown up, falling into foraminous conveyer 10 transfers out ingot or foreign matter outside the drum, particle by transmission net 10 enters heat exchanger 12, fall into flight 2 after the heat exchange, taken up by the flight 2 in the rotary drum 1 once more and fall into fluid bed 3, in repeatedly circulation, particle diameter increases gradually, enter discharging opening 20 dischargings, discharging is through screening, cooling obtains the grain products of qualified particle diameter and temperature, crosses granule and returns granulation once more in the rotary drum through refeed line 13; The fluidization air that enters in the rotary drum is drawn through induced duct 15, having dust and particle in rotary drum rotation and air flow process falls below the air-vent, carried 16 to be transported to separator by strength, separator below stream pipe is granule and dust directional nozzle, and separator gas is connected with induced duct to pipe.
Claims (9)
1. rotary drum fluid-bed heat-converter granulating method of the present invention and device, it is characterized in that: when rotary drum rotates, the fold-type flight that the crystal seed that adds from rotary drum one end is distributed in the rotary drum inboard is copied and is arranged on fixed fluidized bed in the rotary drum, evenly distribute with multihole distributor that side plate links to each other on, and side plate is higher than multihole distributor (150-500) mm, fluidized gas enters from the air chamber bottom the multihole distributor to be cooled off with dry seed particles, promoting seed particles simultaneously is the multihole distributor of (0-5) ° along the angle with the axial horizontal plane of rotary drum, process is the flash mouth of (0-250) mm highly, seed particles evenly falls to forming the material curtain through tripper, granulating raw material liquid sprays to the material curtain after nozzle atomization, drop is contacted with the collision of seed curtain, coat on the surface, solidify, the material curtain is fallen on the foraminous conveyer, fall again by the particle of foraminous conveyer and to carry out heat exchange on the heat exchanger, falling the bottom of the drum after the heat exchange is copied into fluid bed by the fold-type flight again, through so repeatedly circulation, grain diameter is increased continuously.
2. rotary drum fluid-bed heat-converter granulating method as claimed in claim 1 and device is characterized in that: described tripper can be one or more.
3. rotary drum fluid-bed heat-converter granulating method as claimed in claim 1 and device is characterized in that: described material liquid pipe can be one or more, and the nozzle on the material liquid pipe is located at material curtain one side position or two side positions spray to the material curtain with material liquid.
4. rotary drum fluid-bed heat-converter granulating method as claimed in claim 1 and device is characterized in that: described heat exchanger is a plate type heat exchanger, can be one or more layers and be (30-90) ° perpendicular to the inclination angle of the axial horizontal plane of rotary drum.
5. as described rotary drum fluid-bed heat-converter granulating method of claim (1-4) and device, it is characterized in that: described heat exchanger can be contained in the fluid bed top and also can be contained in the fluid bed below or heat exchanger all is housed up and down.
6. rotary drum fluid-bed heat-converter granulating method as claimed in claim 1 and device is characterized in that: described heat exchanger is provided with foraminous conveyer, and the foraminous conveyer aperture is (10-100) mm, limits caking and enters heat exchanger with foreign matter, makes it to be transported to outside the rotary drum.
7. rotary drum fluid-bed heat-converter granulating method as claimed in claim 1 and device is characterized in that: described material curtain direction is led by the fixed guide plate, and thickness is realized by the tripper rocker that is arranged on the flash mouth.
8. rotary drum fluid-bed heat-converter granulating method as claimed in claim 1 and device, it is characterized in that: when described fusing urea pipe is many and the rotary drum shaft core position nearest one and farthest one be provided with baffle plate, block the urea droplets that sprays to flight and fluid bed, heater or vibrating device are arranged on the baffle plate.
9. rotary drum fluid-bed heat-converter granulating method as claimed in claim 1 and device, it is characterized in that: Pneumatic conveyer or bucket elevator are equipped with in position, described rotary drum one or both sides, falling outer dust of rotary drum and particle transport to separator, separator below stream pipe granule and dust directional nozzle apart from the place ahead (100-200) mm, fine particle is increased fast, alleviate pressure recovery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101229501A CN100546707C (en) | 2007-07-06 | 2007-07-06 | Rotary drum fluid-bed heat-converter granulating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101229501A CN100546707C (en) | 2007-07-06 | 2007-07-06 | Rotary drum fluid-bed heat-converter granulating method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101125283A true CN101125283A (en) | 2008-02-20 |
| CN100546707C CN100546707C (en) | 2009-10-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007101229501A Expired - Fee Related CN100546707C (en) | 2007-07-06 | 2007-07-06 | Rotary drum fluid-bed heat-converter granulating method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104803732A (en) * | 2015-05-13 | 2015-07-29 | 孔亦周 | Differential pelletizing device with vibrating function for melt compound fertilizer and method using device |
| CN109331740A (en) * | 2018-12-12 | 2019-02-15 | 扬州日发干燥工程有限公司 | Fluidized hot bed pelletizer in one kind |
| CN115364764A (en) * | 2022-09-09 | 2022-11-22 | 北京达立科科技有限公司 | Low-energy-consumption high-capacity granulation process method |
-
2007
- 2007-07-06 CN CNB2007101229501A patent/CN100546707C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104803732A (en) * | 2015-05-13 | 2015-07-29 | 孔亦周 | Differential pelletizing device with vibrating function for melt compound fertilizer and method using device |
| CN109331740A (en) * | 2018-12-12 | 2019-02-15 | 扬州日发干燥工程有限公司 | Fluidized hot bed pelletizer in one kind |
| CN115364764A (en) * | 2022-09-09 | 2022-11-22 | 北京达立科科技有限公司 | Low-energy-consumption high-capacity granulation process method |
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| Publication number | Publication date |
|---|---|
| CN100546707C (en) | 2009-10-07 |
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Granted publication date: 20091007 Termination date: 20120706 |