CN202087162U - Tail gas filtering and back flushing device of uranyl nitride hot denitration fluidized bed - Google Patents
Tail gas filtering and back flushing device of uranyl nitride hot denitration fluidized bed Download PDFInfo
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- CN202087162U CN202087162U CN2011201143998U CN201120114399U CN202087162U CN 202087162 U CN202087162 U CN 202087162U CN 2011201143998 U CN2011201143998 U CN 2011201143998U CN 201120114399 U CN201120114399 U CN 201120114399U CN 202087162 U CN202087162 U CN 202087162U
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- tail gas
- barrel body
- filter
- fluidized bed
- pipe
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Abstract
The utility model belongs to a nuclear industry uranium purification technology and particularly discloses a tail gas filtering and back flushing device of a uranyl nitride hot denitration fluidized bed. The device comprises an upper barrel body and a lower barrel body, a patterned plate is arranged between the upper barrel body and the lower barrel body, a filter is fixedly arranged in the upper barrel body, a gas inlet main pipe is arranged below the filter, gas inlet branch pipes which are communicated with the gas inlet main pipe are symmetrically arranged on the side wall of the gas inlet main pipe, and a nozzle is arranged at the top end of each gas inlet branch pipe; a plurality of Venturi throats are arranged on the patterned plate, a tail gas pipe communicated with the Venturi throat is arranged at the lower part of each Venturi throat, and the tail gas pipe penetrates through the patterned plate to extend downward and is arranged in the lower barrel body; and the Venturi throats correspond to the nozzles respectively. In the tail gas filtering and back flushing device, raw materials can be flushed back to the fluidized bed, the material losses in the running process of the denitration fluidized bed can be avoided, meanwhile, the back flushing device prevents the fine uranium materials in the bed from being attached to a filter pipe, blocking the filter pipe and influencing the stable running of the fluidized bed.
Description
Technical field
The utility model belongs to nuclear industry uranium purification technique, is specifically related to a kind of back-blowing device.
Background technology
In uranyl nitrtate pyrolysis denitration fluidized system, it is very thin that the uranium oxide particle becomes after fluidisation, the carefullyyest reaches tens microns, enter atmosphere and contaminated environment by tail gas easily, and the uranium material belongs to strict control of material, must reclaim, and therefore need filter tail gas.Filter generally adopts the sintered stainless steel filter.In the fluid bed running, the fluidized gas flow is bigger, is in slight positive pressure state in the bed, and trickle material causes screen pipe to stop up easily attached on the screen pipe in the bed, and the fluidized bed internal pressure is fluctuateed, and is prone to accidents.In order to guarantee the normal operation of fluid bed, need a kind of filtration and back-blowing device.
Summary of the invention
The purpose of this utility model is to provide a kind of interior trickle uranium material of fluid bed of avoiding attached on the screen pipe, causes screen pipe to stop up, and does not influence the uranyl nitrtate pyrolysis denitration fluid bed tail gas filtering and the back-blowing device of fluid bed stable operation simultaneously.
The technical solution of the utility model is as follows:
A kind of uranyl nitrtate pyrolysis denitration fluid bed tail gas filtering and back-blowing device, it comprises upper shell and lower shell, the above-mentioned card that is provided with between the two, in upper shell, be fixed with filter, this filter below is provided with the inlet manifold, inlet manifold's sidewall is arranged with the air intake branch that communicates with it, and each air intake branch top is provided with nozzle; Described card is provided with some Venturi throats, and each Venturi throat below is provided with the offgas duct that communicates with it, and described offgas duct is passed card and extended downwards, is positioned at lower shell inside; Described Venturi throat is corresponding one by one with the position of nozzle.
In above-mentioned uranyl nitrtate pyrolysis denitration fluid bed tail gas filtering and back-blowing device: be provided with supporting cover on the described card, the top of screen pipe is positioned at supporting cover, Venturi throat is stuck in the upper port of screen pipe, outside Venturi throat, supporting cover above be provided with gland, by tightening screw gland is fixed.
In above-mentioned uranyl nitrtate pyrolysis denitration fluid bed tail gas filtering and back-blowing device: be provided with flange for upper shell outside the described upper shell, described lower shell is provided with flange of lower shell outward, the outer of described card is positioned at outside the barrel of upper shell and lower shell, and flange for upper shell and flange of lower shell are clamped the outer of card.
The beneficial effects of the utility model are: by design the back-blowing device of being made up of Venturi throat and air inlet pipe etc. below filter, original filter can be returned the raw material blowback in the fluid bed, not only avoided loss of material in the denitration fluid bed running, back-blowing device has also avoided an interior trickle uranium material attached on the screen pipe simultaneously, cause screen pipe to stop up, influence the stable operation of fluid bed.
Description of drawings
Uranyl nitrtate pyrolysis denitration fluid bed tail gas filtering and back-blowing device structural representation that Fig. 1 provides for the utility model;
Fig. 2 is the A position cutaway view of Fig. 1;
Fig. 3 is the B position cutaway view of Fig. 1;
Among the figure: 1. inlet manifold; 2. air intake branch; 3. nozzle; 4. upper shell; 5. filter; 6. gland; 7. packing ring; 8. flange for upper shell; 9. bolt; 10. lower shell; 11. screen pipe; 12. Venturi throat; 13. supporting cover; 14. card; 15. flange of lower shell; 16. tighten screw; 17. pad; 18. engine manifold.
The specific embodiment
Below in conjunction with drawings and the specific embodiments the utility model is described in further detail.
As shown in Figure 1, the cylindrical shell of fluidized bed filter device is divided into upper shell 4 and lower shell 10 two parts, in upper shell 4 external stabilities flange for upper shell 8 is installed, and in the external stability of lower shell 10 flange of lower shell 15 is installed.Be installed with inlet manifold 1 below the inside of upper shell 4, filter 5, draw 31 air intake branches 2 from inlet manifold 1, closely weld with inlet manifold 1 sidewall, the top of every air intake branch 2 is equipped with the into nozzle 3 of blowback air.As shown in Figure 2, the both sides that are welded on inlet manifold 1 of air intake branch 2 symmetries, one section of this air intake branch 2 is straight tube, another section is a bend pipe, at the top of one section of bend pipe fixed installation nozzle 3.
As shown in Figure 1, card 14 is installed between upper shell 4 and lower shell 10, and the outer of card 14 is positioned at outside the barrel of upper shell 4 and lower shell 10, the outer that flange for upper shell 8 and flange of lower shell 15 are clamped card 14, by bolt 9 and packing ring 7 card 14 is compressed again, simultaneously upper shell 4 and lower shell 10 two parts are fixed.At described card 14 upper surfaces Venturi throat 12 is installed, lid Venturi throat 12 aligns with the position of nozzle 3.Venturi throat 12 outer gland 6 and the supporting covers 13 of being set with.Offgas duct 11 is passed card 14, is positioned at lower shell 10 inside.
As shown in Figure 3, supporting cover 13 is stuck on the card 14, and Venturi throat 12 is positioned at supporting cover 13 inside, and the top of screen pipe 11 is positioned at supporting cover 13, and the remainder of screen pipe 11 passes card 14, extends downwards.Described Venturi throat 12 is stuck in the upper port of screen pipe 11, places pad 17 between the lower surface of screen pipe 11 and supporting cover 13, Venturi throat 12 outside, supporting cover 13 above add a cover gland 6, by tightening screw 16 gland 6 is fixed again.
During work, the blowback air of preheating enters in the filter 5 by inlet manifold 1, spray into compressed air according to pre-set timing blanking time to Venturi throat 12 by air intake branch 2 and nozzle 3, sectional area increase along with Venturi throat 12, pressure of compressed air reduces, flow velocity reduces thereupon, and its blowback effect strengthens.Compressed air will return in the fluid bed attached to the raw material blowback on the screen pipe 5, make it continue reaction.Avoid fluid bed long-time running sintered stainless steel screen pipe to stop up.This filtration back-blowing device has fully guaranteed the normal operation of exhaust system, has avoided loss of material.
Claims (3)
1. uranyl nitrtate pyrolysis denitration fluid bed tail gas filtering and back-blowing device, it is characterized in that: it comprises upper shell (4) and lower shell (10), the above-mentioned card (14) that is provided with between the two, in upper shell (4), be fixed with filter (5), this filter (5) below is provided with inlet manifold (1), inlet manifold (1) sidewall is arranged with the air intake branch (2) that communicates with it, and each air intake branch (2) top is provided with nozzle (3); Described card (14) is provided with some Venturi throats (12), and each Venturi throat (12) below is provided with the offgas duct (11) that communicates with it, and described offgas duct (11) is passed card (14) extension downwards, is positioned at lower shell (10) inside; Described Venturi throat (12) is corresponding one by one with the position of nozzle (3).
2. a kind of uranyl nitrtate pyrolysis denitration fluid bed tail gas filtering as claimed in claim 1 and back-blowing device, it is characterized in that: described card (14) is provided with supporting cover (13), the top of screen pipe (11) is positioned at supporting cover (13), Venturi throat (12) is stuck in the upper port of screen pipe (11), outside Venturi throat (12), the top of supporting cover (13) is provided with gland (6), and is by tightening screw (16) that gland (6) is fixing again.
3. a kind of uranyl nitrtate pyrolysis denitration fluid bed tail gas filtering as claimed in claim 1 or 2 and back-blowing device, it is characterized in that: the outer flange for upper shell (8) that is provided with of described upper shell (4), the outer flange of lower shell (15) that is provided with of described lower shell (10), the outer of described card (14) is positioned at outside the barrel of upper shell (4) and lower shell (10), and flange for upper shell (8) and flange of lower shell (15) are clamped the outer of card (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201143998U CN202087162U (en) | 2011-04-18 | 2011-04-18 | Tail gas filtering and back flushing device of uranyl nitride hot denitration fluidized bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201143998U CN202087162U (en) | 2011-04-18 | 2011-04-18 | Tail gas filtering and back flushing device of uranyl nitride hot denitration fluidized bed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202087162U true CN202087162U (en) | 2011-12-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201143998U Expired - Lifetime CN202087162U (en) | 2011-04-18 | 2011-04-18 | Tail gas filtering and back flushing device of uranyl nitride hot denitration fluidized bed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202087162U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106693529A (en) * | 2016-12-07 | 2017-05-24 | 中核四0四有限公司 | Uranium dioxide hydrofluorination reactor in-built type gas filtering device |
| CN114642938A (en) * | 2020-12-18 | 2022-06-21 | 中核四0四有限公司 | UO prepared by uranyl nitrate atomization drying pyrolysis denitration3Method for treating tail gas |
-
2011
- 2011-04-18 CN CN2011201143998U patent/CN202087162U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106693529A (en) * | 2016-12-07 | 2017-05-24 | 中核四0四有限公司 | Uranium dioxide hydrofluorination reactor in-built type gas filtering device |
| CN114642938A (en) * | 2020-12-18 | 2022-06-21 | 中核四0四有限公司 | UO prepared by uranyl nitrate atomization drying pyrolysis denitration3Method for treating tail gas |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111228 |