CN203615784U - Cooling fluidized bed used for urea prilling tower - Google Patents
Cooling fluidized bed used for urea prilling tower Download PDFInfo
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- CN203615784U CN203615784U CN201320804230.4U CN201320804230U CN203615784U CN 203615784 U CN203615784 U CN 203615784U CN 201320804230 U CN201320804230 U CN 201320804230U CN 203615784 U CN203615784 U CN 203615784U
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Abstract
The utility model relates to a cooling fluidized bed used for a urea prilling tower, and belongs to the field of urea prilling technology. The cooling fluidized bed has a good cooling effect, can prevent urea from forming agglomerations in a prilling tower, and can reduce dust, so that the quality of products is improved. The technical scheme adopted by the utility model is that the cooling fluidized bed comprises two wind-distribution plates arranged symmetrically, the wind-distribution plates are positioned in a small pot arranged at the bottom of the prilling tower, a plurality of wind caps are arranged on the wind-distribution plates, air surging bunkers are arranged at the lower parts of the wind-distribution plates, the wind caps are communicated with the air surging bunkers, a blanking pipe is vertically arranged between the wind-distribution plates, the two wind-distribution plates are obliquely arranged and the porosity ratio of the wind caps is different in the upper row and the lower row, a ventilation opening and a lookout opening are formed in the side wall of one air surging bunker, and the ventilation opening is connected with a fan arranged outside the prilling tower through an air pipe. According to the utility model, the cooling fluidized bed can be widely applied to the urea production field.
Description
Technical field
A kind of cooling bed for urea prilling tower of the utility model, belongs to carbamide granulation technical field.
Background technology
Urea prilling tower is the key equipment during urea product is produced, most of urea enterprise constantly carries out Increasing Production and Energy Saving technological transformation, production capacity has had and has increased substantially, and granulation tower remains the tower in former when design, the investment of newly-built granulation tower is very large again, do not transform and can cause urea temperature drift, band ammonia taste, easily lump, impact is sold.
40,000 tons of urea of annual output of existing chemical plant urea plant design are increased to the production capacity of producing 200000 tons per year by volume increase, considerably beyond designed productive capacity, cause urea particle temperature higher, especially granulation tower bottom particle temperature summer is up to 80 ℃, and that high-temperature particle does not obtain is cooling in time, cause dust larger, bring considerable influence to packing site environment and product quality.And due to summer humidity ratio larger, affect urea moisture content, urea product easily hardens, and product quality is caused to very large impact.
Put fluid bed heat sink so a lot of enterprises set up at the bottom of granulation tower, solve the problem that urea size temperature is high.But existing fluid bed heat sink is because the blast cap percent opening on air distribution plate is even, so the urea granules falling is even, and the bore of tremie pipe is usually less than the diameter of air distribution plate, thereby causes urea granules to pile up on air distribution plate, easily causes obstruction.Another existing its blower fan of fluid bed heat sink is directly blown into granulation tower bottom by blast cap by cold wind, stops up once blast cap appears in running, can cause that ventilation is inhomogeneous, causes urea granules inhomogeneous cooling even, affects cooling effect.
Utility model content
The utility model has overcome the deficiency that prior art exists, and a kind of good cooling results is provided, and can prevent that urea from forming caking in granulation tower, reduces dust, thus the cooling bed for urea prilling tower improving the quality of products.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of cooling bed for urea prilling tower, comprise two symmetrically arranged air distribution plates, described air distribution plate is positioned at pannikin place, granulation tower bottom, on described air distribution plate, be provided with multiple blast caps, the bottom of described air distribution plate is provided with air cushioning storehouse, described blast cap and air cushioning storehouse are connected, the middle part of described air distribution plate is vertically provided with tremie pipe, the top of described tremie pipe flushes with air distribution plate, the bottom of described tremie pipe communicates through the bottom in air cushioning storehouse and the discharging opening of granulation tower,
Two described air distribution plates be obliquely installed and blast cap in row's percent opening difference up and down, lower row's percent opening, higher than upper row's percent opening, flows urea particle in decline process to tremie pipe place;
On the sidewall in described air cushioning storehouse, be provided with ventilating opening He lookout mouthful, described ventilating opening is connected with the blower fan that is arranged on granulation tower outside by ventilation duct, outside cold air is injected on air cushioning storehouse Suo Shu lookout mouth and is provided with transparent baffle plate, Suo Shu lookout confession monitoring granulation tower internal work state.
Between described granulation tower bottom pannikin and air distribution plate, be provided with netted protective cover, prevent that the urea of caking from falling to smashing air distribution plate.
The bottom of described tremie pipe is provided with urea conveyer belt, and the urea that described urea conveyer belt falls tremie pipe is delivered to urea packing place and packed, and between described urea conveyer belt and urea packing place, is provided with screening machine, and agramon is reclaimed.
The utility model compared with prior art has following beneficial effect: the percent opening of upper and lower Wind discharging hat is arranged to difference by the utility model, and air distribution plate is obliquely installed, thereby the urea declining is flowed to the tremie pipe being arranged in the middle of air distribution plate, can discharge in time, can not stop up; The air cushioning storehouse that is arranged on air distribution plate bottom will be redistributed after Air pressure accumulation to air distribution plate, enter granulation tower by blast cap, each blast cap exhaust is even, cooling effect is good, can prevent that urea from forming caking in granulation tower, reduces dust, can greatly reduce urea product particle temperature, and granulation tower has been increased to ventilation, reduce because of the cooling unnecessary micro-powdery urine producing not in place; Be arranged on air cushioning storehouse sidewall Shang lookout mouth, the flushing of can conveniently overhauling and stop.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described further.
Fig. 1 is structural representation of the present utility model.
In figure, 1 is that air distribution plate, 2 is that blast cap, 3 is that air cushioning storehouse, 4 is tremie pipe.
The specific embodiment
As shown in Figure 1, a kind of cooling bed for urea prilling tower of the utility model, comprise two symmetrically arranged air distribution plates 1, described air distribution plate 1 is positioned at pannikin place, granulation tower bottom, on described air distribution plate 1, be provided with multiple blast caps 2, the bottom of described air distribution plate 1 is provided with air cushioning storehouse 3, described blast cap 2 and air cushioning storehouse 3 are connected, the middle part of described air distribution plate 1 is vertically provided with tremie pipe 4, the top of described tremie pipe 4 flushes with air distribution plate 1, and the bottom of described tremie pipe 4 communicates through the bottom in air cushioning storehouse 3 and the discharging opening of granulation tower;
Two described air distribution plates 1 be obliquely installed and blast cap 2 in row's percent opening difference up and down, lower row's percent opening, higher than upper row's percent opening, flows urea particle in decline process to tremie pipe 4 places;
On the sidewall in described air cushioning storehouse 3, be provided with ventilating opening He lookout mouthful, described ventilating opening is connected with the blower fan that is arranged on granulation tower outside by ventilation duct, outside cold air is injected on the 3 Suo Shu lookout mouths of air cushioning storehouse and is provided with transparent baffle plate, Suo Shu lookout confession monitoring granulation tower internal work state.
Between described granulation tower bottom pannikin and air distribution plate 1, be provided with netted protective cover, prevent that the urea of caking from falling to smashing air distribution plate 1.
The bottom of described tremie pipe 4 is provided with urea conveyer belt, and the urea that described urea conveyer belt falls tremie pipe 4 is delivered to urea packing place and packed, and between described urea conveyer belt and urea packing place, is provided with screening machine, and agramon is reclaimed.
In the utility model from the gas flow process in blower fan enters granulation tower: cool ambient air enters air cushioning storehouse 3 after being pressurizeed by blower fan through air register, distributed by air cushioning storehouse 3, guarantee the air quantity difference of the blast cap 2 that enters diverse location according to the difference of the percent opening on air distribution plate 1.Cold air enters air distribution plate 1 top by blast cap 2 and contacts and carry out heat exchange with the urea particle of the high-temperature falling, and after heat exchange, air upwards enters the urea particle continuation heat exchange of granulation tower and whereabouts, is finally got rid of by granulation tower top.
The urea particle flow process falling from granulation tower in the utility model: the urea particle of heat fall air distribution plate 1 with blast cap 2 cold air contact heat-exchanging out after, temperature reduces, due to the upper and lower percent opening difference of Wind discharging hat 2 and the installation gradient of air distribution plate 1, urea particle is flowed to tremie pipe 4 places of center, finally flow into tower bottom belt by tremie pipe 4 and remove finished product packing.
After the utility model is implemented, at the bottom of tower, urea particle temperature can reduce by 20 ℃ of left and right, and dust content reduces greatly, thereby has guaranteed the end product quality of urea.
By reference to the accompanying drawings embodiment of the present utility model is explained in detail above, but the utility model is not limited to above-described embodiment, in the ken possessing those of ordinary skills, can also under the prerequisite that does not depart from the utility model aim, make various variations.
Claims (3)
1. the cooling bed for urea prilling tower, it is characterized in that: comprise two symmetrically arranged air distribution plates (1), described air distribution plate (1) is positioned at pannikin place, granulation tower bottom, on described air distribution plate (1), be provided with multiple blast caps (2), the bottom of described air distribution plate (1) is provided with air cushioning storehouse (3), described blast cap (2) and air cushioning storehouse (3) are connected, the middle part of described air distribution plate (1) is vertically provided with tremie pipe (4), the top of described tremie pipe (4) flushes with air distribution plate (1), the bottom of described tremie pipe (4) communicates with the discharging opening of granulation tower through the bottom in air cushioning storehouse (3),
Two described air distribution plates (1) be obliquely installed and blast cap (2) in row's percent opening difference up and down, lower row's percent opening, higher than upper row's percent opening, makes urea particle locate to flow to tremie pipe (4) in decline process;
On the sidewall in described air cushioning storehouse (3), be provided with ventilating opening He lookout mouthful, described ventilating opening is connected with the blower fan that is arranged on granulation tower outside by ventilation duct, outside cold air is injected on air cushioning storehouse (3) Suo Shu lookout mouth and is provided with transparent baffle plate, Suo Shu lookout confession monitoring granulation tower internal work state.
2. a kind of cooling bed for urea prilling tower according to claim 1, is characterized in that: between described granulation tower bottom pannikin and air distribution plate (1), be provided with netted protective cover, prevent that the urea of caking from falling to smashing air distribution plate (1).
3. a kind of cooling bed for urea prilling tower according to claim 1 and 2, it is characterized in that: the bottom of described tremie pipe (4) is provided with urea conveyer belt, the urea that described urea conveyer belt falls tremie pipe (4) is delivered to urea packing place and is packed, between described urea conveyer belt and urea packing place, be provided with screening machine, agramon is reclaimed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320804230.4U CN203615784U (en) | 2013-12-10 | 2013-12-10 | Cooling fluidized bed used for urea prilling tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320804230.4U CN203615784U (en) | 2013-12-10 | 2013-12-10 | Cooling fluidized bed used for urea prilling tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203615784U true CN203615784U (en) | 2014-05-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320804230.4U Expired - Fee Related CN203615784U (en) | 2013-12-10 | 2013-12-10 | Cooling fluidized bed used for urea prilling tower |
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| CN (1) | CN203615784U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107796238A (en) * | 2017-11-30 | 2018-03-13 | 四川理工学院 | Bottom blast formula cooling tower cloth wind structure |
| CN111939835A (en) * | 2020-08-21 | 2020-11-17 | 陶娟 | Preparation method of organic compound fertilizer |
-
2013
- 2013-12-10 CN CN201320804230.4U patent/CN203615784U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107796238A (en) * | 2017-11-30 | 2018-03-13 | 四川理工学院 | Bottom blast formula cooling tower cloth wind structure |
| CN111939835A (en) * | 2020-08-21 | 2020-11-17 | 陶娟 | Preparation method of organic compound fertilizer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20140528 Termination date: 20141210 |
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| EXPY | Termination of patent right or utility model |