CN211245955U - Defogging device for outlet of urea hydrolysis reactor - Google Patents
Defogging device for outlet of urea hydrolysis reactor Download PDFInfo
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- CN211245955U CN211245955U CN201921461849.3U CN201921461849U CN211245955U CN 211245955 U CN211245955 U CN 211245955U CN 201921461849 U CN201921461849 U CN 201921461849U CN 211245955 U CN211245955 U CN 211245955U
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- hydrolysis reactor
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Abstract
The utility model relates to a urea hydrolysis reactor export defogging device, including connecting the cavity barrel in urea hydrolysis reactor export, the barrel is inside to have set gradually the choked flow stator, the silk screen defogging section of not totally shutoff barrel from bottom to top along the gaseous phase flow direction. This urea hydrolysis reactor export defogging device's simple structure has add the choked flow stator of the totally enclosed barrel of not on the basis of traditional silk screen defogging for strengthen the air current disturbance and block the liquid drop in the air current as far as possible, and then improve comprehensive defogging effect.
Description
Technical Field
The utility model relates to a urea hydrolysis reactor export defogging device belongs to flue gas denitration technical field.
Background
The urea hydrolysis method for preparing ammonia gas is a reducing agent preparation process in the SCR denitration process of flue gas of a thermal power plant. The principle is that under a certain temperature and pressure, urea solution is subjected to hydrolysis reaction in a hydrolysis reactor to generate ammonia gas and carbon dioxide. And the generated ammonia gas, carbon dioxide and part of water vapor leave the hydrolysis reactor and then enter a boiler flue to perform denitration reaction. The inner space of the hydrolysis reactor is divided into a lower liquid phase space and an upper vapor phase space, and the vapor phase space is filled with a large amount of small liquid drops besides the reactants of ammonia and carbon dioxide due to the violent boiling of the liquid phase space. The small droplets have the same composition as the hydrolysis reaction solution, and a part of urea is dissolved therein. If the small droplets enter the pipeline of the subsequent equipment along with the hydrolysate, the small droplets are vaporized due to the change of factors such as pressure and the like in the operation process, and the urea dissolved in the small droplets can be crystallized and separated out to block the equipment and the pipeline. It is therefore desirable to minimize the number of small droplets entrained in the gas stream at the outlet of the hydrolysis reactor.
The current technology commonly used in the industry is that a wire mesh demister is arranged at a product outlet of a hydrolysis reactor, and because the content of small liquid drops in a gas phase is large, the demisting effect is not ideal and cannot be improved due to the limitation of the demisting capacity of the wire mesh demister.
SUMMERY OF THE UTILITY MODEL
In view of the not enough of prior art, the utility model aims to solve the technical problem that a urea hydrolysis reactor export defogging device is provided, not only simple structure, convenient high efficiency moreover.
In order to solve the technical problem, the technical scheme of the utility model is that: the utility model provides a urea hydrolysis reactor export defogging device, is including connecting the cavity barrel in urea hydrolysis reactor export, and the barrel is inside to have set gradually the choked flow stator, the silk screen defogging section of not totally plugging the barrel from bottom to top along the gaseous phase flow direction.
Preferably, a rotational flow demisting section is further arranged inside the cylinder at the lower part of the flow blocking guide vane.
Preferably, the cyclone demisting section comprises a plurality of spiral guide vanes which are uniformly distributed in the cylinder body at the periphery, and the cyclone demisting section is arranged close to the outlet of the urea hydrolysis reactor.
Preferably, the flow blocking guide vane comprises a corrugated section and a partition section which are sequentially arranged from bottom to top along the gas phase flow direction.
Preferably, the ripple section includes that the multi-disc is the crooked buckled plate of class S-shaped, and the buckled plate all distributes along the inside chord length direction of barrel, and the side of its class S-shaped all links firmly with the barrel inner wall, all sets firmly on the face of buckled plate from inside to outside down inclined barb form and strain the drip piece.
Preferably, the partition section comprises an eave-type partition and an annular partition, the eave-type partition is fixedly arranged in the middle of the barrel, the surface of the eave-type partition inclines downwards from inside to outside, the annular partition is fixedly arranged on the inner circumferential wall of the barrel, the surface of the annular partition inclines downwards from outside to inside, and the eave-type partition is positioned below the inner ring of the annular partition and has a through-flow gap with the inner ring of the annular partition.
Preferably, the eave type partition plate is in an annular funnel shape with a downward large opening.
Preferably, the silk screen defogging section is including wholly being cylindrical silk screen, and the up end of silk screen has set firmly the die mould rib, and the silk screen external diameter is the same with the barrel internal diameter.
Preferably, the profiling ribs comprise an annular ring fixedly connected to the inner wall of the cylinder body, and reinforcing spokes are fixedly arranged in the annular ring.
Preferably, the peripheral wall of the cylinder body is fixedly provided with a middle flange and an upper flange.
Compared with the prior art, the utility model discloses following beneficial effect has: this urea hydrolysis reactor export defogging device's simple structure has add the choked flow stator of the totally enclosed barrel of not on the basis of traditional silk screen defogging for strengthen the air current disturbance and block the liquid drop in the air current as far as possible, and then improve comprehensive defogging effect.
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Drawings
Fig. 1 is a schematic diagram of the prior art.
Fig. 2 is a first schematic structural diagram of an embodiment of the present invention.
Fig. 3 is a second schematic structural diagram of an embodiment of the present invention.
Fig. 4 is a top view of the demisting section of the screen.
FIG. 5 is a top view of a corrugated section.
FIG. 6 is a top view of the cyclonic demisting section.
Detailed Description
In order to make the aforementioned and other features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
As shown in fig. 1~6, a urea hydrolysis reactor export defogging device, including connecting at the cavity barrel 2 of 1 export of urea hydrolysis reactor, the barrel is inside to have set gradually the choked flow stator 3, the silk screen defogging section 4 of not totally shutoff barrel from bottom to top along the gaseous phase flow direction, and the barrel bottom is uncovered with the top, and the bottom is used for admitting air, and the top is used for exhausting.
The embodiment of the utility model provides an in, the barrel of choked flow stator lower part is inside still to be provided with whirl defogging section 5.
The embodiment of the utility model provides an in, whirl defogging section includes a plurality of circumference equipartitions at the inside screw guide vane 6 of barrel, and whirl defogging section is close to urea hydrolysis reactor export setting.
The embodiment of the utility model provides an in, the choked flow stator includes ripple section, the baffle section that sets gradually from bottom to top along the gaseous phase flow direction.
The embodiment of the utility model provides an in, the ripple section includes that the multi-disc is the crooked buckled plate of class S-shaped 7, and the buckled plate all distributes along the inside chord length direction of barrel, and the side of its class S-shaped all links firmly with the barrel inner wall, all sets firmly on the face of buckled plate from inside to outside down inclined barb form strain dripping piece 8.
The embodiment of the utility model provides an in, the baffle section includes eave formula baffle 9 and annular baffle 10, and eave formula baffle sets firmly middle part and its face from inside to outside slope down in the barrel, and annular baffle sets firmly in barrel internal perisporium and its face from outside to inside slope down, and eave formula baffle lies in under the annular baffle inner circle and with annular baffle inner circle between have through-flow clearance 11.
In the embodiment of the utility model provides an in, eave formula baffle is the annular funnel shape under the macrostoma.
The embodiment of the utility model provides an in, silk screen defogging section is including wholly being cylindrical silk screen 12, and the up end of silk screen has set firmly die mould rib 13, and the silk screen external diameter is the same with the barrel internal diameter.
The embodiment of the utility model provides an in, the die mould rib is including linking firmly the annular ring 14 at the barrel inner wall, has set firmly enhancement spoke 15 in the annular ring, has solved the silk screen because the too big local deformation problem that produces of pressure differential strengthens the silk screen rigidity.
The embodiment of the utility model provides an in, the barrel periphery wall has set firmly middle part flange 16, upper portion flange 17, and middle part flange is fixed with urea hydrolysis reactor exit linkage, and upper portion flange is fixed with low reaches pipeline entrance connection, improves the efficiency of overhauing and changing.
The embodiment of the utility model provides an in, the air current blocks the liquid drop in the air current as far as possible through whirl defogging section, ripple section, baffle section, silk screen defogging section from bottom to top in proper order, and the mist after the defogging is through the uncovered entering low reaches pipeline in barrel top. Wherein: (1) the spiral guide vane in the spiral flow demisting section enables the inlet airflow to rotate, and the large liquid drops are thrown onto the wall surface of the spiral guide vane under the action of centrifugal force and are discharged downwards under the action of gravity; the air current passes through clearance between the adjacent buckled plate in the ripple section, and the movement track increases, separates liquid wherein through the collision of air current and buckled plate, and the drip piece is strained to the barb form simultaneously improves big liquid drop filtering capacity, and big liquid drop also can collide on the drip piece is strained to the barb form, discharges downwards under the action of gravity. (2) The silk screen defogging section is arranged in the droplet of separation air current, and eave formula baffle further increases the orbit of air current with annular baffle, strengthens the air current disturbance that gets into silk screen defogging section, and then improves comprehensive defogging effect, and eave formula baffle also is favorable to colliding the liquid drop of gathering with annular baffle and discharges downwards at the action of gravity.
The present invention is not limited to the above preferred embodiments, and any person can obtain the demisting device for the outlet of the urea hydrolysis reactor in various forms. All the equivalent changes and modifications made according to the claims of the present invention shall fall within the scope of the present invention.
Claims (7)
1. The utility model provides a urea hydrolysis reactor export defogging device which characterized in that: the device comprises a hollow cylinder connected with the outlet of a urea hydrolysis reactor, wherein flow blocking guide vanes and a wire mesh demisting section which do not completely block the cylinder are sequentially arranged in the cylinder from bottom to top along the gas phase flow direction; the flow blocking guide vane comprises a corrugated section and a partition plate section which are sequentially arranged from bottom to top along the gas phase flow direction; the corrugated section comprises a plurality of corrugated plates bent like S, the corrugated plates are distributed along the chord length direction in the cylinder body, the side edges of the S-like shapes of the corrugated plates are fixedly connected with the inner wall of the cylinder body, and barb-shaped filtering drip sheets inclined downwards from inside to outside are fixedly arranged on the plate surfaces of the corrugated plates; the partition section comprises an eave type partition plate and an annular partition plate, the eave type partition plate is fixedly arranged in the middle of the barrel, the surface of the eave type partition plate inclines downwards from inside to outside, the annular partition plate is fixedly arranged on the inner peripheral wall of the barrel, the surface of the annular partition plate inclines downwards from outside to inside, and the eave type partition plate is positioned below the inner ring of the annular partition plate and has a through-flow gap with the inner ring of the annular partition plate.
2. The urea hydrolysis reactor outlet demister device of claim 1, wherein: the barrel at the lower part of the flow blocking guide vane is also internally provided with a rotational flow demisting section.
3. The urea hydrolysis reactor outlet demister device of claim 2, wherein: the cyclone demisting section comprises a plurality of spiral guide vanes which are uniformly distributed on the circumference inside the cylinder body, and the cyclone demisting section is arranged close to the outlet of the urea hydrolysis reactor.
4. The urea hydrolysis reactor outlet demister device of claim 1, wherein: the eave type clapboard is an annular funnel shape with a downward large opening.
5. The urea hydrolysis reactor outlet demister device of claim 1, wherein: the silk screen defogging section is including wholly being cylindrical silk screen, and the up end of silk screen has set firmly the die mould rib, and the silk screen external diameter is the same with the barrel internal diameter.
6. The urea hydrolysis reactor outlet demister as set forth in claim 5, wherein: the profiling ribs comprise annular rings fixedly connected to the inner wall of the cylinder body, and reinforcing spokes are fixedly arranged in the annular rings.
7. The urea hydrolysis reactor outlet demister device of claim 1, wherein: the peripheral wall of the cylinder body is fixedly provided with a middle flange and an upper flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921461849.3U CN211245955U (en) | 2019-09-04 | 2019-09-04 | Defogging device for outlet of urea hydrolysis reactor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921461849.3U CN211245955U (en) | 2019-09-04 | 2019-09-04 | Defogging device for outlet of urea hydrolysis reactor |
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| Publication Number | Publication Date |
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| CN211245955U true CN211245955U (en) | 2020-08-14 |
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| CN201921461849.3U Active CN211245955U (en) | 2019-09-04 | 2019-09-04 | Defogging device for outlet of urea hydrolysis reactor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114011186A (en) * | 2021-11-18 | 2022-02-08 | 西安西热锅炉环保工程有限公司 | Demist device for outlet of tapered urea hydrolyzer |
-
2019
- 2019-09-04 CN CN201921461849.3U patent/CN211245955U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114011186A (en) * | 2021-11-18 | 2022-02-08 | 西安西热锅炉环保工程有限公司 | Demist device for outlet of tapered urea hydrolyzer |
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| GR01 | Patent grant | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20230626 Address after: 250300 Unit 2, Building 1, Industrial and Commercial Bureau Dormitory, Wensheng Street, Changqing District, Jinan, Shandong Province Patentee after: Meng Xianheng Address before: 1004, Building 1, Qinting Lake, No. 123, Nanping East Road, Fuzhou City, Fujian Province, 350012 Patentee before: Huang Sijia |
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| TR01 | Transfer of patent right |