CN201340203Y - Fluidized cooling device for urea prilling tower - Google Patents
Fluidized cooling device for urea prilling tower Download PDFInfo
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- CN201340203Y CN201340203Y CNU2008201713769U CN200820171376U CN201340203Y CN 201340203 Y CN201340203 Y CN 201340203Y CN U2008201713769 U CNU2008201713769 U CN U2008201713769U CN 200820171376 U CN200820171376 U CN 200820171376U CN 201340203 Y CN201340203 Y CN 201340203Y
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Abstract
The utility model discloses a fluidized cooling device for a urea prilling tower, which comprises a prilling tower (1) main body and is characterized in that a material container (2) is arranged at the bottom of an inner cavity (11) of the prilling tower, into which urea particles can fall; a wind distribution plate (5) is transversely arranged at the upper part of an inner cavity (21) of the material container (2); wind distribution through holes (71) are arranged on the wind distribution plate (5), a discharge hole (51) is arranged at the middle part of the wind distribution hole (5); the discharge hole (51) extends into a through hole (22) at the bottom of the material container (2) through a discharge pipe (23); and through a pipeline, the inner cavity (21) of the material container (2) is connected with an input pipe (31) through which air is input by a blower (4), and the input pipe (31) is arranged outside the prilling tower (1). Compared with the prior art, the fluidized cooling device has the advantages that the fluidized cooling device is small in investment and only requires the wind distribution plate and the blower and is convenient to install, and since the fluidized cooling device is installed in the inner cavity of the prilling tower, no additional occupying area is required.
Description
Technical field
The utility model relates to a kind of urea prilling tower fluidisation cooling device technical field.
Background technology
Family surplus China urea production enterprise has 200, there are 2 covers in a lot of enterprises or overlap urea plant more, all adopt tower granulation basically.Generally all be the supporting granulation tower of a covering device, granulation tower typically has a diameter from 9-22 rice, height 60-100 rice.In the urea product process, deliver to the carbamide granulation top of tower through the fusing urea of heating in vacuum simmer down to 99.7% by the Melting pump pressurization and spray granulation.Urea granules when descending with the cold air counter current contacting mass-and heat-transfer of rising, be cooled to after the uniform temperature to be sent to and pack the post packing and storing by belt feeder.
Generally speaking, the urea seed designs temperature that goes out granulation tower is not more than 70 ℃, and further cooling is cooled to during packing below 50 ℃ in the belt transportation.The steam partial pressure that could guarantee particle surface like this is greater than airborne saturated steam dividing potential drop, and urea is non-hygroscopic on the feed belt in granulation tower and at the bottom of the tower, does not increase the water content of particle.Too high as the urea particle temperature, in the temperature-fall period in packaging bag, part steam makes the urea granules surface dissolution in the particle surface condensation, causes mutual adhesion caking.
The height of urea particle tower exit temperature is relevant with factors such as height, cold air temperature and humidity, urea production loads with the granulation tower diameter.Granulation tower diameter and highly often according to design production scale decision.China a collection of little urea production enterprise, the granulation tower diameter often has only 9-12 rice, highly be 60-70 rice, the transformation of constantly expanding production along with urea plant, the device that 40kt or 60kt are produced in former design per year often can reach 100-200kt, in actual production process, because the urea particle density is big in the tower, the heat of being brought into is on the high side, and tower cold air limited amount is advanced in gravity-flow ventilation, thereby the cold of being brought into is limited, causes tower finished urea temperature too high (particularly reaching summer more than 80 ℃), dust content increases, problems such as the granularity qualification rate is on the low side have had a strong impact on product quality.If a newly-built urea prilling tower, one-time investment often reaches up to ten million units.Therefore, how making full use of old tower and transform to satisfy the production needs, is a very important problem.
Summary of the invention
Technical problem to be solved in the utility model be provide at above-mentioned prior art present situation a kind of design ingenious, investment is little, easy for installation and do not increase the urea prilling tower fluidisation cooling device of floor space in addition.
The utility model solves the problems of the technologies described above the technical scheme that is adopted: this urea prilling tower fluidisation cooling device, include the granulation tower body, it is characterized in that: its intracavity bottom of described granulation tower is provided with drop charge body in it of urea granules, inner chamber upper lateral at the charge body is provided with air distribution plate, have cloth wind through hole on the air distribution plate being positioned at, middle part at air distribution plate is provided with blanking hole, blanking hole extends in the bottom through-hole of charge body by tremie pipe, and the inner chamber of charge body is connected through the input pipe of air blast with the air input by pipeline and granulation tower are outer.
As improvement, the tapered hopper shape of described charge body decision design, described air distribution plate is tapered discoid, the air distribution plate of this tapered disk shape is arranged at the charge intracoelomic cavity top of broach hopper, and on the upper surface of air distribution plate, being distributed with the calotte that raises up, described cloth wind through hole compartment of terrain is distributed on the side of calotte.
Improve, angle a may be selected to be the 5-15 degree between the air distribution plate of described tapered disk shape and the level again.
Improve, cloth wind through hole may be selected to be 4 to 12 on its side of described calotte again.
Improve, its downward projection of described calotte can be shapes such as circular, square or hexagon again.
Improve again, above being positioned at air distribution plate and the inner chamber position that is positioned at the charge body of broach hopper shape also can be provided with one deck and prevent that granulation Tata wall caking urea from smashing the crashproof net of air distribution plate and calotte when falling down; Steel wire is elected in described crashproof network optimization as.
Improve, the air input pipe of position is provided with the heater that reduces air humidity between air blast and the granulation tower outer wall again.
Improve, the described pipeline that enters the charge intracoelomic cavity is 1 to 10 the tunnel again, and concrete number can be decided by design.
Compared with prior art, advantage of the present utility model is: invest for a short time, only need air blast, and the charge body, and in the charge body, air distribution plate is set and gets final product, and easy for installation, because it is installed in the inner chamber of making the material tower, so do not increase floor space in addition; Also have, 1, be provided with calotte at air distribution plate, described wind distributing hole is arranged on the calotte, and this calotte one is to change air flow, the 2nd, prevent that the urea particle from directly leaking down from cloth wind through hole; 2, smash air distribution plate and calotte when preventing that granulation Tata wall caking urea from falling down, be provided with crashproof net above air distribution plate, crashproof net adopts the steel wire of certain density; 3, for guaranteeing cooling effect, be provided with heater at the air-in of granulation tower, when air humidity is big, air is suitably heated, reduce air humidity, improve the degree of unsaturation of air, thereby can take away more juicy; 4, air is evenly distributed for guaranteeing air-flow when entering conical hopper shape charge body, can be divided into 2 the road or multichannel enter the charge intracoelomic cavity.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment;
Fig. 2 is the enlarged drawing of the I portion of Fig. 1;
Fig. 3 is along the cutaway view of A-A line among Fig. 2.
The specific embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
As shown in Figure 1 to Figure 3, the urea prilling tower fluidisation cooling device of present embodiment, include granulation tower 1 body, its inner chamber 11 bottoms of described granulation tower are provided with drop charge body 2 in it of urea granules, the air distribution plate 5 that is provided with in inner chamber 21 upper lateral of charge body 2, have cloth wind through hole 71 on the air distribution plate 5 being positioned at, be provided with blanking hole 51 at the middle part of air distribution plate 5, blanking hole 51 extends in the bottom through-hole 22 of charge body 2 by tremie pipe 23, and the inner chamber 21 of charge body 2 is connected with the granulation tower 1 outer input pipe of air being imported through air blast 4 31 by pipeline.Described charge body 2 is the broach hopper shape, and air distribution plate 5 is designed to the tapered disk shape, and the air distribution plate 5 of this tapered disk shape is arranged at charge body 2 inner chambers 21 tops of broach hopper, and angle a is the 5-15 degree between the air distribution plate 5 of tapered disk shape and the horizontal plane.And on the upper surface of air distribution plate 5, be distributed with the calotte 7 that raises up, and described cloth wind through hole 71 compartment of terrains are distributed on the side of calotte 7, and cloth wind through hole 71 can be 4 to 12 on calotte 7 sides, and the cloth wind through hole 71 of present embodiment adopts 8, sees shown in Figure 3.The downward projection of calotte 7 can be shapes such as circular, square or hexagon.Above being positioned at air distribution plate 5 and inner chamber 21 positions that are positioned at the charge body 2 of broach hopper shape be provided with one deck and prevent that granulation tower 1 tower wall caking urea from smashing the crashproof net 6 of air distribution plate 5 and calotte 7 when falling down, this crashproof net 6 adopts steel wires.The input pipe 31 of position is provided with the heater 3 that reduces air humidity between air blast 4 and granulation tower 1 outer wall.And the pipeline that enters charge intracoelomic cavity 21 can be 1 to 10 the tunnel, and present embodiment adopts 2 the tunnel, sees shown in Figure 1.
This urea prilling tower fluidisation cooling device, in the granulation tower bottom secondary cooling apparatus is set, pass through forced ventilation, increase the tower air quantity, the heat of urea particle is fully taken out of, make simultaneously to drop to that the urea particle on the cooling bed is in fluidized state at the bottom of the tower, increase cool time, the urea particle is sufficiently cooled, owing to improved speed air flow, can also make carbamide dust can take granulation tower with the wind out of.
Claims (9)
1, a kind of urea prilling tower fluidisation cooling device, include granulation tower (1) body, it is characterized in that: its inner chamber of described granulation tower (11) bottom is provided with drop charge body (2) in it of urea granules, inner chamber (21) upper lateral in charge body (2) is provided with air distribution plate (5), have cloth wind through hole (71) on the air distribution plate (5) being positioned at, be provided with blanking hole (51) at the middle part of air distribution plate (5), blanking hole (51) extends in the bottom through-hole (22) of charge body (2) by tremie pipe (23), and the inner chamber (21) of charge body (2) is connected through the input pipe (31) of air blast (4) with the air input by pipeline and granulation tower (1) are outer.
2, urea prilling tower fluidisation cooling device according to claim 1, it is characterized in that: the tapered hopper shape of described charge body (2), described air distribution plate (5) is tapered discoid, the air distribution plate of this tapered disk shape (5) is arranged at charge body (2) inner chamber (21) top of broach hopper, and on the upper surface of air distribution plate (5), being distributed with the calotte (7) that raises up, described cloth wind through hole (71) compartment of terrain is distributed on the side of calotte (7).
3, urea prilling tower fluidisation cooling device according to claim 2, it is characterized in that: angle a is the 5-15 degree between air distribution plate of described tapered disk shape (5) and the horizontal plane.
4, urea prilling tower fluidisation cooling device according to claim 3 is characterized in that: cloth wind through hole (71) is 4 to 12 on its side of described calotte (7).
5, urea prilling tower fluidisation cooling device according to claim 3 is characterized in that: its downward projection of described calotte (7) is circular, square or hexagon.
6, according to the described urea prilling tower fluidisation of arbitrary claim cooling device in the claim 2 to 4, it is characterized in that: be provided with one deck in inner chamber (21) position that is positioned at air distribution plate (5) top and is positioned at the charge body (2) of broach hopper shape and prevent that granulation tower (1) tower wall caking urea from smashing the crashproof net (6) of air distribution plate (5) and calotte (7) when falling down.
7, urea prilling tower fluidisation cooling device according to claim 6 is characterized in that: described crashproof net (6) is a steel wire.
8, according to the described urea prilling tower fluidisation of arbitrary claim cooling device in the claim 1 to 4, it is characterized in that: the input pipe (31) that is positioned at position between air blast (4) and granulation tower (1) outer wall is provided with the heater (3) that reduces air humidity.
9, according to the described urea prilling tower fluidisation of arbitrary claim cooling device in the claim 1 to 4, it is characterized in that: the described pipeline that enters charge intracoelomic cavity (21) is 1 to 10 the tunnel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201713769U CN201340203Y (en) | 2008-12-19 | 2008-12-19 | Fluidized cooling device for urea prilling tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201713769U CN201340203Y (en) | 2008-12-19 | 2008-12-19 | Fluidized cooling device for urea prilling tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201340203Y true CN201340203Y (en) | 2009-11-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201713769U Expired - Fee Related CN201340203Y (en) | 2008-12-19 | 2008-12-19 | Fluidized cooling device for urea prilling tower |
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| CN (1) | CN201340203Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102126901A (en) * | 2011-01-25 | 2011-07-20 | 中国科学院南京土壤研究所 | Granulator and preparation method for coated 15N urea |
| CN102423625A (en) * | 2011-11-29 | 2012-04-25 | 南京龙玖环境工程有限公司 | Circulating fluidized bed flue gas desulfurization tower |
| CN102964148A (en) * | 2012-12-03 | 2013-03-13 | 李思斌 | Improved large granule urea combined drum granulating method and equipment |
| CN103153450A (en) * | 2010-08-09 | 2013-06-12 | 南方公司 | Ash and solids cooling in high temperature and high pressure environment |
| CN104566400A (en) * | 2014-12-20 | 2015-04-29 | 无锡东马锅炉有限公司 | Air distribution plate for sludge incinerator |
-
2008
- 2008-12-19 CN CNU2008201713769U patent/CN201340203Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103153450A (en) * | 2010-08-09 | 2013-06-12 | 南方公司 | Ash and solids cooling in high temperature and high pressure environment |
| CN103153450B (en) * | 2010-08-09 | 2015-01-28 | 南方公司 | Ash and solids cooling in high temperature and high pressure environment |
| CN102126901A (en) * | 2011-01-25 | 2011-07-20 | 中国科学院南京土壤研究所 | Granulator and preparation method for coated 15N urea |
| CN102126901B (en) * | 2011-01-25 | 2013-06-05 | 中国科学院南京土壤研究所 | Granulator and preparation method for coated 15N urea |
| CN102423625A (en) * | 2011-11-29 | 2012-04-25 | 南京龙玖环境工程有限公司 | Circulating fluidized bed flue gas desulfurization tower |
| CN102964148A (en) * | 2012-12-03 | 2013-03-13 | 李思斌 | Improved large granule urea combined drum granulating method and equipment |
| CN102964148B (en) * | 2012-12-03 | 2014-07-16 | 李思斌 | Improved large granule urea combined drum granulating method and equipment |
| CN104566400A (en) * | 2014-12-20 | 2015-04-29 | 无锡东马锅炉有限公司 | Air distribution plate for sludge incinerator |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091104 Termination date: 20161219 |
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| CF01 | Termination of patent right due to non-payment of annual fee |