CN201524505U - Urea prilling tower equipped with tail gas dust removing device - Google Patents

Urea prilling tower equipped with tail gas dust removing device Download PDF

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Publication number
CN201524505U
CN201524505U CN2009202177655U CN200920217765U CN201524505U CN 201524505 U CN201524505 U CN 201524505U CN 2009202177655 U CN2009202177655 U CN 2009202177655U CN 200920217765 U CN200920217765 U CN 200920217765U CN 201524505 U CN201524505 U CN 201524505U
Authority
CN
China
Prior art keywords
prilling tower
dedusting device
urea
urea prilling
tails dedusting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN2009202177655U
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Chinese (zh)
Inventor
杨振峰
李发林
杨国杰
张永昌
肖新
王连伍
张福庆
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHANDONG HUALU-HENGSHENG CHEMICAL Co Ltd
Original Assignee
SHANDONG HUALU-HENGSHENG CHEMICAL Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SHANDONG HUALU-HENGSHENG CHEMICAL Co Ltd filed Critical SHANDONG HUALU-HENGSHENG CHEMICAL Co Ltd
Priority to CN2009202177655U priority Critical patent/CN201524505U/en
Application granted granted Critical
Publication of CN201524505U publication Critical patent/CN201524505U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model discloses a urea prilling tower equipped with a tail gas dust removing device. The tail gas dust removing device is arranged outside a tail gas run-out passage at the top part of the urea prilling tower, the tail gas dust removing device is provided with a box body, a spraying device and a deforming device are arranged inside the box body, a liquid collecting tank is arranged below the spraying device, an induced draft fan is arranged at the top part of the box body, and the induced draft fan adopts an axial-flow fan. The urea prilling tower of the utility model not only can effectively wash the tail gas by relying on a washing device inside the tail gas dust removing device, but also can increase the wind speed inside the tower remarkably by relying on the induced draft fan, thereby reducing the temperature inside the tower; urea is less susceptible to caking; and the pelletizating effect is good.

Description

The urea prilling tower of tails dedusting device is set
Technical field
The utility model relates to urea prilling tower, and the urea prilling tower of tails dedusting device particularly is set.
Background technology
Usually, the prilling that adopts of most of urea production producer is to make by gravity-flow ventilation that fusing urea cools off in dropping process, coagulation forming carries out granulation.Consult Fig. 1, in this course, generally all be entrained with the certain amount of urea dust in the tail gas of urea prilling tower tower top discharge, these carbamide dust major parts fall near the device district, not only corrode building, the harm plant production has also had a strong impact on atmospheric environment and water resource simultaneously.Simultaneously, each urea producer expands production in recent years significantly, the urea prilling tower excess load is produced, problem such as can make again that thereby the urea temperature high occurs that urea easily lumps, granulation weak effect, ammonia flavor are big, in order to solve the high problem of urea temperature, each producer lowers the temperature in the accelerated tower by the ventilation that increases urea prilling tower tower bottom flow bed, but has aggravated the discharging of carbamide granulation cat head carbamide dust simultaneously again, further increase the weight of the pollution problem of environment, also caused the waste of urea.
In order to solve the difficult problem of exhaust emission, the multiple technologies route has appearred, a kind of is at the carbamide granulation cat head simple water washing dedust device (as shown in Figure 2) to be set, still adopt gravity-flow ventilation, on improvement is polluted, certain effect is arranged, but owing to be provided with water washing device, flowing resistance heightens, ventilation descends, can make the urea temperature be difficult to effectively descend again, urea easily lumps, and causes the sticking the bottom of a pan of urea serious, and this water washing dedust device also only is applicable to the urea prilling tower of ad hoc structure, all discloses similar dust arrester as Chinese patent CN201052447 and Chinese patent application CN10111679A; Also have in addition by the air inducing pipeline and urea prilling tower tail gas is introduced the water scrubber washing that is arranged on ground, effect is better, but owing to need a large amount of stainless steel equipment pipelines that adopt, investment increases about 30 times, power consumption simultaneously is also very surprising, reaches 20KWH/ ton urea.
The utility model content
Technical problem to be solved in the utility model provides a kind of urea prilling tower that the tails dedusting device is set, this tails dedusting device is positioned at the carbamide granulation top of tower, and air-introduced machine is set at tails dedusting device top, wind speed in the urea prilling tower is improved greatly, not only can rely on the wash mill in the tails dedusting device effectively to wash tail gas, and can significantly reduce temperature in the tower, and the urea prevented from caking, granulation is effective.
For solving the problems of the technologies described above, the technical scheme that the utility model is taked is, a kind of urea prilling tower that the tails dedusting device is set, described tails dedusting device is arranged on the tail gas flow pass place of carbamide granulation top of tower, described tails dedusting device has a casing, be provided with spray equipment and Despumation device in the casing, described spray equipment below is provided with collecting tank, and described casing top is provided with air-introduced machine.
Further, described air-introduced machine is the axial flow blower of stainless steel, and described axial flow blower is more than two.
Further, described spray equipment comprises the two-layer above spray thrower that is interspersed, and described every layer of spray thrower comprises equally distributed three above atomizers.
Further, described Despumation device comprises two-layer above demister, and described demister is the waveform wire mesh demister, and the V-type opening direction of each layer waveform wire mesh demister is staggered.
Further, described lower box is provided with slanting baffle, also is provided with the pre-absorption shower nozzle under the described slanting baffle.
Further, described collecting tank and spray equipment form fluid circuit by pipeline.
The beneficial effect that the utility model can reach is:
1, the utility model urea prilling tower is provided with air-introduced machine at the casing top of tails dedusting device, does not need to be provided with in addition the air inducing pipeline, and the wind speed of urea prilling tower is improved greatly, has solved urea blanking temperature height, easily the difficult problem of caking; Experimental results show that the axial flow blower that adopts stainless steel, 0.6-1m/S in the time of can making the interior wind speed of urea prilling tower from gravity-flow ventilation brings up to 3m/s, and because wind speed increases, can make the volume of the casing of tails dedusting device be reduced to original 1/3-1/2, reduce the load-bearing of urea prilling tower; And the axial flow blower power consumption is extremely low, makes the increase of whole technology operating cost seldom, has reduced operating cost.
2, the tails dedusting device of the utility model urea prilling tower is provided with the multilayer spray equipment that is crisscross arranged, but efficient absorption is removed the urea of carrying secretly in the tail gas.
3, the tails dedusting device of the utility model urea prilling tower is provided with the staggered multilayer demister of opening direction, make tail gas baffling increased frequency, solve the entrainment problem of high speed tail gas stream, do not have the dead angle in the middle of the multilayer demister simultaneously, be difficult for forming urea crystals.
4, the tails dedusting device in the utility model urea prilling tower also is provided with slanting baffle, and the slanting baffle below is provided with the pre-absorption shower nozzle, and tail gas is carried out pre-wash.
5, the cleaning solution that absorbs tail gas in the utility model urea prilling tower can send vapo(u)rization system granulation again after collecting tank is collected, and has improved productive rate.
Description of drawings
Fig. 1 is existing urea prilling tower structural representation;
Fig. 2 is the existing urea prilling tower structural representation that is provided with the water washing dedust device;
Fig. 3 is according to the urea prilling tower structural representation that the tails dedusting device is set of the present utility model.
The specific embodiment
See also Fig. 3, be provided with the urea prilling tower structural representation of tails dedusting device for the utility model embodiment.
The utility model embodiment urea prilling tower comprises urea prilling tower main body 1 and tails dedusting device 2, tails dedusting device 2 is arranged on tail gas flow pass 4 places at urea prilling tower main body 1 top, be provided with Despumation device 5 and spray equipment 6 in the tails dedusting device, spray equipment 6 belows are provided with collecting tank 9, are provided with between granulation 11 in the urea prilling tower main body 1.Tails dedusting device 2 has a casing 10, and casing 10 tops are provided with an axial flow blower, and axial flow blower is made by stainless steel.By the structure of above-mentioned urea prilling tower, under the effect of axial flow blower, the wind speed in the urea prilling tower can significantly improve, and effectively reduces temperature in the tower, the problem of solved urea temperature height, easily luming.Certainly, axial flow blower can be provided with many as required, and when wherein an axial flow blower broke down, the tails dedusting device can continue to use.
Further, in the present embodiment tails dedusting device, spray equipment 6 comprises the two-layer spray thrower 61 that is interspersed, and every layer of spray thrower 61 comprises equally distributed ten atomizers 62, with realization the tail gas through the tails dedusting device is evenly sprayed.
Further again, present embodiment Despumation device 5 comprises two-layer waveform wire mesh demister, and " V " type opening direction of each layer demister is 90 degree to be arranged, to solve the entrainment problem of high velocity air.
In addition, present embodiment tails dedusting device box downside both sides also respectively are provided with a slanting baffle 7, the slanting baffle below is provided with pre-absorption shower nozzle 8, like this, when tail gas air channel of both sides through between granulation enters in the tails dedusting device, contact earlier through slanting baffle 7 bafflings, and with the cleaning solution of pre-absorption shower nozzle 8 ejections, absorbed a part of urea in the tail gas in advance.
In the present embodiment, collecting tank 9 and pre-absorption shower nozzle 8 and spray equipment 6 connect into fluid circuit by pipeline, and cleaning solution is recycling.
In process of production, washing is handled through the cleaning solution of pre-absorption shower nozzle 8 ejections earlier in the tail gas that produces in the prilling 11 two-layer air channels through between granulation, and then by spray equipment 6 and Despumation device 5 further cleaning dusts, content of urea just drops to seldom in the tail gas like this.Simultaneously, because the effect of axial flow blower 3, the effect of spray equipment and Despumation device can't make the wind speed in the tower reduce, wind speed is improved greatly, and then in to vent gas treatment, the temperature in the tower also can reduce, and has solved vent gas treatment and the high problem of urea temperature simultaneously.And, when urea concentration reaches a certain amount of in the cleaning solution that collecting tank is collected, cleaning solution can be sent the granulation again of urea evaporation prilling system, realize the recycling once more of urea.
To sum up institute is old, only is the preferred embodiment of the utility model, is not the scope that is used for limiting the utility model enforcement.Be that all equalizations of being done according to the utility model claim change and modification, be all the utility model claim and contain.

Claims (8)

1. urea prilling tower that the tails dedusting device is set, described tails dedusting device is arranged on the tail gas flow pass place of carbamide granulation top of tower, described tails dedusting device has a casing, be provided with spray equipment and Despumation device in the casing, described spray equipment below is provided with collecting tank, it is characterized in that described casing top is provided with air-introduced machine.
2. the urea prilling tower that the tails dedusting device is set according to claim 1 is characterized in that, described air-introduced machine is the axial flow blower of stainless steel.
3. the urea prilling tower that the tails dedusting device is set according to claim 2 is characterized in that, described axial flow blower is more than two.
4. the urea prilling tower that the tails dedusting device is set according to claim 1 and 2 is characterized in that, described spray equipment comprises the two-layer above spray thrower that is interspersed.
5. the urea prilling tower that the tails dedusting device is set according to claim 4 is characterized in that, described every layer of spray thrower comprises equally distributed three above atomizers.
6. the urea prilling tower that the tails dedusting device is set according to claim 1 and 2, it is characterized in that, described Despumation device comprises two-layer above demister, and described demister is the waveform wire mesh demister, and the V-type opening direction of each layer waveform wire mesh demister is staggered.
7. the urea prilling tower that the tails dedusting device is set according to claim 1 and 2 is characterized in that described lower box is provided with slanting baffle, also is provided with the pre-absorption shower nozzle under the described slanting baffle.
8. the urea prilling tower that the tails dedusting device is set according to claim 1 and 2 is characterized in that described collecting tank and spray equipment form fluid circuit by pipeline.
CN2009202177655U 2009-09-28 2009-09-28 Urea prilling tower equipped with tail gas dust removing device Expired - Lifetime CN201524505U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009202177655U CN201524505U (en) 2009-09-28 2009-09-28 Urea prilling tower equipped with tail gas dust removing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2009202177655U CN201524505U (en) 2009-09-28 2009-09-28 Urea prilling tower equipped with tail gas dust removing device

Publications (1)

Publication Number Publication Date
CN201524505U true CN201524505U (en) 2010-07-14

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Country Status (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102423763A (en) * 2011-10-20 2012-04-25 天脊煤化工集团股份有限公司 Anti-scarring method and device for discharge chute of granulating machine
CN111085144A (en) * 2019-12-31 2020-05-01 安徽六国化工股份有限公司 Tail gas treatment device for urea prilling tower

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102423763A (en) * 2011-10-20 2012-04-25 天脊煤化工集团股份有限公司 Anti-scarring method and device for discharge chute of granulating machine
CN102423763B (en) * 2011-10-20 2013-09-04 天脊煤化工集团股份有限公司 Anti-scarring method and device for discharge chute of granulating machine
CN111085144A (en) * 2019-12-31 2020-05-01 安徽六国化工股份有限公司 Tail gas treatment device for urea prilling tower

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Granted publication date: 20100714