CN203355709U - Internal heating and fluidifying device for spent fuel denitration fluidized bed - Google Patents
Internal heating and fluidifying device for spent fuel denitration fluidized bed Download PDFInfo
- Publication number
- CN203355709U CN203355709U CN 201320308173 CN201320308173U CN203355709U CN 203355709 U CN203355709 U CN 203355709U CN 201320308173 CN201320308173 CN 201320308173 CN 201320308173 U CN201320308173 U CN 201320308173U CN 203355709 U CN203355709 U CN 203355709U
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- China
- Prior art keywords
- block set
- distribution plate
- air distribution
- blind flange
- fluid bed
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- 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.)
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- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The utility model relates to an internal heating and fluidifying device for a spent fuel denitration fluidized bed. The internal heating and fluidifying device comprises a gas distribution mechanism arranged in the spent fuel denitration fluidized bed and heaters (3) connected to the gas distribution mechanism, wherein the gas distribution mechanism comprises an outer cylinder (6) and a gas distribution board (8) arranged at the top of the outer cylinder; a fluidized gas inlet (15) is formed in the side surface of the outer cylinder (6); the bottom end of the outer cylinder (6) is connected with a flange (1) below which a blind flange (5) connected with the flange (1) is arranged; the lower parts of the heaters (3) vertically penetrate and are connected with the gas distribution board (8) and the blind flange (5) from the top down. According to the internal heating and fluidifying device, fluidifying and heating parts are modularized, and the fluidized bed can be maintained so long as the internal heating and fluidifying device is wholly detached and replaced by a prepared module and the module to be maintained is transported elsewhere for maintenance, so that the overall operating rate of the fluidized bed is improved; besides, since the blind flange is detachable, the convenience in maintaining built-in components is improved.
Description
Technical field
The utility model belongs to the fluidization field, is specifically related to the interior heat supply fluidizer of spentnuclear fuel denitration fluid bed.
Background technology
Two-step method prepares UO
2technical process at home and abroad generally adopt, the denitration fluid bed is that two-step method prepares UO
2key equipment in flow process, its major function is by UO
2(NO
3)
2solution adds thermal denitration, generates UO
3.The heating denitrification process is strong endothermic reaction, wants to make denitration reaction to carry out smoothly, and the feed liquid (UO after nozzle atomization
2(NO
3)
2solution) non-crystallizable solidifying in bed, heater must provide enough heats at short notice effectively.Fluidized bed denitration adopted the modes such as outer heat supply, fused salt heating, quartz lamp radiation external heat in the world.Heating system and regulating system more complicated that above mode of heating adopts, and there is the shortcoming that heating efficiency is low, heat loss is little.
The utility model content
For the defect existed in prior art, the purpose of this utility model is to provide that a kind of heating efficiency is high, the utilization of capacity is high, is convenient to the interior heat supply fluidizer of the spentnuclear fuel denitration fluid bed of dismounting and maintenance.
For reaching above purpose, the technical solution adopted in the utility model is: the interior heat supply fluidizer of spentnuclear fuel denitration fluid bed, comprise and be located at the gas distribution mechanism in spentnuclear fuel denitration fluid bed and be connected to the heater in gas distribution mechanism, gas distribution mechanism comprises urceolus and is located at the air distribution plate at urceolus top, the side of urceolus is provided with inlet for fluidization air, the bottom of urceolus is connected with flange, and the below of flange is provided with coupled blind flange; The bottom of heater is vertically run through air distribution plate and blind flange from top to bottom, and is connected on air distribution plate and blind flange.
Further, air distribution plate is provided with blast cap, and the head of blast cap stretches out outside air distribution plate; The head of blast cap stretches out the outer part of air distribution plate and is provided with the fluidized gas outlet.
Further, be provided with annular pre-distribution grid in urceolus, the upper and lower end of the pre-distribution grid of annular is connected with blind flange with air distribution plate respectively, and on pre-distribution grid, edge is circumferentially with qi-emitting hole.
Further again, heater is comprised of heating rod and the block set that is sleeved on periphery, heating rod bottom, and stretch out outside block set the bottom of heating rod; The top of block set is connected on air distribution plate and stretch out outside air distribution plate its upper end, and the bottom of block set is connected on blind flange and stretch out outside blind flange its lower end; The inner surface of the upper and lower part of block set is connected with the outer surface of heating rod, and the part that heating rod is located in block set forms the heater ring cavity with the inwall of block set; The middle part of block set is along being circumferentially with the block set air admission hole, and the top of block set is stretched out the outer part of air distribution plate and is provided with the block set venthole.
Further, the bottom of the block set of heater is provided with external screw thread, and blind flange is provided with the screwed hole with the external screw thread adaptation of block set.
Again further, the junction of the bottom of block set and blind flange is provided with the first sealing ring.
Further, the bottom surface of air distribution plate is provided with the first annular groove, the second annular groove successively to center from outer rim, and the top of urceolus is connected on the inner bottom surface of the first annular groove of air distribution plate.
Further again, the inner surface of blind flange is provided with the blind flange annular groove corresponding with the second annular groove of air distribution plate, and the top of pre-distribution grid is located in the second annular groove of air distribution plate, and the bottom of pre-distribution grid is connected on the inner bottom surface of blind flange annular groove.
Further, be provided with liner between the top of the inner bottom surface of the second annular groove of air distribution plate and pre-distribution grid.
Further, be provided with the second sealing ring between flange and blind flange.
The utility model adopts in electrical bar and is heated to be the master, is aided with the mode of external insulation, compares other mode of heatings, and in electrical bar, heating has following advantage: a. can greatly improve for calorific intensity, and heating efficiency is high, and heat loss is little; B. heating system and adjusting are controlled simply, good economy performance; C. electrical bar, as longitudinal member, can improve fluidization quality, reduces a body vibration; In addition, the utility model, by fluidisation, heater block modularization, only needs this device integral body is pulled down during the maintenance fluid bed, changes the module of having got ready, and the Awaiting Overhaul module transports the elsewhere maintenance to and gets final product, and has improved the utilization of capacity of fluid bed integral body; And, because blind flange is detachable, improved the convenience that overhauls built-in parts.
The accompanying drawing explanation
Fig. 1 is the internal structure schematic diagram of a kind of interior heat supply fluidizer that provides of the utility model;
Fig. 2 is the structural representation of heater in Fig. 1;
Fig. 3 is the structural representation of Fig. 1 Apoplexy cap;
Fig. 4 a is the enlarged diagram of I position in Fig. 1;
Fig. 4 b is the enlarged diagram of II position in Fig. 1;
Fig. 4 c is the enlarged diagram of III position in Fig. 1.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is further described.
As shown in Figure 1, the interior heat supply fluidizer of spentnuclear fuel denitration fluid bed provided by the utility model, comprise and be located at the gas distribution mechanism in spentnuclear fuel denitration fluid bed and be connected to the heater 3 in gas distribution mechanism, gas distribution mechanism comprises urceolus 6 and is located at the air distribution plate 8 at urceolus 6 tops, the side of urceolus 6 is provided with inlet for fluidization air 15, the bottom of urceolus 6 is connected with flange 1, and the below of flange 1 is provided with coupled blind flange 5; The bottom of heater 3 is vertically run through air distribution plate 8 and blind flange 5 from top to bottom, and is connected on air distribution plate 8 and blind flange 5.
In the utility model, air distribution plate 8 is provided with blast cap 7, and the head of blast cap 7 stretches out outside air distribution plate 8.As shown in Figure 3, the head of blast cap 7 stretches out the outer parts of air distribution plate 8 and is provided with oblique lower fluidized gas and exports 7-1.Blast cap 7 be circumferentially with external screw thread, air distribution plate 8 is provided with the screwed hole with the external screw thread adaptation of blast cap 7, thereby blast cap 7 can be fastened on air distribution plate 8.Because external screw thread and the screwed hole quality of fit on air distribution plate 8 of blast cap 7 are very high, when fluidized gas enters in fluid bed by blast cap 7, the pressure loss can be ignored.
In order to prevent that fluidized gas is short-circuited after inlet for fluidization air 15 enters urceolus 6, preferably, be provided with annular pre-distribution grid 2 in urceolus 6, the upper and lower end of the pre-distribution grid 2 of annular is connected with blind flange 5 with air distribution plate 8 respectively, and on pre-distribution grid 2, edge is circumferentially with qi-emitting hole.On the pre-distribution grid 2 of annular, the gross area of qi-emitting hole should equate with the sectional area of inlet for fluidization air on urceolus 15.
As shown in Figure 2, the utility model a kind of preferred embodiment in, heater 3 is comprised of heating rod 12 and the block set 13 that is sleeved on heating rod 12 peripheries, bottom, stretch out outside block set 13, for connecting power line the bottom of heating rod 12; In heating rod 12, top is arranged in the fluid bed inner chamber, plays the function of heating punch press bed material after energising.Concrete connected mode is such: the top of block set 13 is connected on air distribution plate 8 and stretch out outside air distribution plate 8 its upper end, and the bottom of block set 13 is connected on blind flange 5 and stretch out outside blind flange 5 its lower end; The outer surface of the inner surface of the upper and lower part of block set 13 and heating rod 12 welds together, and the part that heating rod 12 is located in block set 13 forms heater ring cavity 14 with the inwall of block set 13; In addition, the middle part of block set 13 is the entrance of fluidized gas at heater 3 positions along being circumferentially with block set air admission hole 13-1(); The top of block set 13 is stretched out the outer parts of air distribution plate 8 and is provided with the block set venthole 13-2 under oblique.Adopt the heater 3 of this structure, can compensate the inhomogeneities of gas distribution.
The top of the block set 13 of heater 3 and air distribution plate 8 matched in clearance.The bottom of block set 13 is provided with external screw thread, and blind flange 5 is provided with the screwed hole of the external screw thread adaptation of some and block set 13, thereby the bottom of block set 13 can be inserted in the screwed hole of blind flange 5, and by locking nut 4, block set 13 is tightened on blind flange 5.
As shown in Fig. 4 a, the bottom of the block set 13 of heater 3 and the junction of blind flange 5 are provided with the first sealing ring 9.After being tightened in the screwed hole of the bottom insertion blind flange 5 of block set 13, the first sealing ring 9 is compressed, thereby realizes inside and outside sealing.
As shown in Figure 4 b, the bottom surface of air distribution plate 8 is provided with the first annular groove 8-1, the second annular groove 8-2 successively to center from outer rim, and the top of urceolus 6 is welded on the inner bottom surface of the first annular groove 8-1 of air distribution plate 8.In addition, the inner surface of blind flange 5 is provided with the blind flange annular groove corresponding with the second annular groove 8-2 of air distribution plate 8, and the top of pre-distribution grid 2 is located in the second annular groove 8-2 of air distribution plate 8, and the bottom of pre-distribution grid 2 is connected on the inner bottom surface of blind flange annular groove.And, being provided with liner 11 between the top of the inner bottom surface of the second annular groove 8-2 of air distribution plate 8 and pre-distribution grid 2, liner 11 is bonded on the inner bottom surface of the second annular groove 8-2.
As shown in Fig. 4 c, be provided with the second sealing ring 10 between flange 1 and blind flange 5.After flange 1 is bolted with blind flange 5, liner 11, the second sealing ring 10 are compressed, realize between inner chamber, the sealing between inner chamber and outside atmosphere.
In the utility model, the core component of heating is heater 3, and the core component of fluidisation is blast cap 7.Below this device of summary is realized the mechanism of fluidisation, heating.
Fluidized gas (is the nitrogen hydrogen mixeding gas of ammonia cracking generation, hydrogen is reducing agent) from the inlet for fluidization air 15 of urceolus 6, enter in the ring cavity between urceolus 6 and pre-distribution grid 2, owing to having realized sealing everywhere, fluidized gas can only enter by the qi-emitting hole of pre-distribution grid 2 in the inner chamber of urceolus 6, when gas passes through pre-distribution grid 2, realized the even gas distribution for the first time of gas; After gas enters the inner chamber of urceolus 6, part gas is discharged by the outlet of the fluidized gas on blast cap 7 7-1, another part gas enters in the heater ring cavity 14 of heater 3 by block set air admission hole 13-1, and discharge by block set venthole 13-2, because the gross area of fluidized gas outlet 7-1 and block set venthole 13-2 on blast cap 7 is less, gas speed, pressure will be brought up to fluidisation pressure and the gas speed of bed, be enough to the UO in the bed body
3powder (work fills a bed material) fluidization, now by heating rod 12 energisings, by the bed material heating of filling after fluidisation, (is UO by nozzle by feed liquid simultaneously
2(NO
3)
2solution) after atomization, spray in the fluid bed inner chamber, moment completes denitration reaction.
Structure described in the utility model is not limited to the embodiment described in the specific embodiment, and those skilled in the art draw other embodiment according to the technical solution of the utility model, belongs to equally technological innovation scope of the present utility model.
Claims (10)
1. the interior heat supply fluidizer of spentnuclear fuel denitration fluid bed, it is characterized in that, comprise and be located at the gas distribution mechanism in spentnuclear fuel denitration fluid bed and be connected to the heater (3) in gas distribution mechanism, gas distribution mechanism comprises urceolus (6) and is located at the air distribution plate (8) at urceolus (6) top, the side of urceolus (6) is provided with inlet for fluidization air (15), the bottom of urceolus (6) is connected with flange (1), and the below of flange (1) is provided with coupled blind flange (5); The bottom of heater (3) is vertically run through air distribution plate (8) and blind flange (5) from top to bottom, and is connected with blind flange (5) with air distribution plate (8).
2. the interior heat supply fluidizer of spentnuclear fuel denitration fluid bed according to claim 1, is characterized in that, air distribution plate (8) is provided with blast cap (7), and the head of blast cap (7) stretches out outside air distribution plate (8); The head of blast cap (7) stretches out the outer part of air distribution plate (8) and is provided with fluidized gas outlet (7-1).
3. the interior heat supply fluidizer of spentnuclear fuel denitration fluid bed according to claim 1 and 2, it is characterized in that, be provided with the pre-distribution grid (2) of annular in urceolus (6), the upper and lower end of pre-distribution grid (2) is connected with blind flange (5) with air distribution plate (8) respectively, and pre-distribution grid (2) is upper along being circumferentially with qi-emitting hole.
4. the interior heat supply fluidizer of spentnuclear fuel denitration fluid bed according to claim 3, it is characterized in that, heater (3) is comprised of heating rod (12) and the block set (13) that is sleeved on heating rod (12) periphery, bottom, and stretch out outside block set (13) bottom of heating rod (12);
The top of block set (13) is connected to air distribution plate (8) above and stretch out outside air distribution plate (8) its upper end, and the bottom of block set (13) is connected to blind flange (5) above and stretch out outside blind flange (5) its lower end;
The inner surface of the upper and lower part of block set (13) is connected with the outer surface of heating rod (12), and the part that heating rod (12) is located in block set (13) forms heater ring cavity (14) with the inwall of block set (13);
The middle part of block set (13) is along being circumferentially with block set air admission hole (13-1), and the top of block set (13) is stretched out the outer part of air distribution plate (8) and is provided with block set venthole (13-2).
5. the interior heat supply fluidizer of spentnuclear fuel denitration fluid bed according to claim 4, is characterized in that, external screw thread is established in the bottom of the block set (13) of heater (3), and blind flange (5) is provided with the screwed hole with the external screw thread adaptation of block set (13).
6. the interior heat supply fluidizer of spentnuclear fuel denitration fluid bed according to claim 5, is characterized in that, the first sealing ring (9) that the junction of the bottom of block set (13) and blind flange (5) is provided with.
7. the interior heat supply fluidizer of spentnuclear fuel denitration fluid bed according to claim 3, it is characterized in that, the bottom surface of air distribution plate (8) is provided with the first annular groove (8-1), the second annular groove (8-2) successively to center from outer rim, the top of urceolus (6) is connected on the inner bottom surface of the first annular groove (8-1) of air distribution plate (8).
8. the interior heat supply fluidizer of spentnuclear fuel denitration fluid bed according to claim 7, it is characterized in that, the inner surface of blind flange (5) is provided with the blind flange annular groove corresponding with second annular groove (8-2) of air distribution plate (8), the top of pre-distribution grid (2) is located in second annular groove (8-2) of air distribution plate (8), and the bottom of pre-distribution grid (2) is connected on the inner bottom surface of blind flange annular groove.
9. the interior heat supply fluidizer of spentnuclear fuel denitration fluid bed according to claim 8, is characterized in that, between the top of the inner bottom surface of second annular groove (8-2) of air distribution plate (8) and pre-distribution grid (2), is provided with liner (11).
10. the interior heat supply fluidizer of spentnuclear fuel denitration fluid bed according to claim 1, is characterized in that, between flange (1) and blind flange (5), is provided with the second sealing ring (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320308173 CN203355709U (en) | 2013-05-31 | 2013-05-31 | Internal heating and fluidifying device for spent fuel denitration fluidized bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320308173 CN203355709U (en) | 2013-05-31 | 2013-05-31 | Internal heating and fluidifying device for spent fuel denitration fluidized bed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203355709U true CN203355709U (en) | 2013-12-25 |
Family
ID=49803533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320308173 Expired - Fee Related CN203355709U (en) | 2013-05-31 | 2013-05-31 | Internal heating and fluidifying device for spent fuel denitration fluidized bed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203355709U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109925872A (en) * | 2017-12-18 | 2019-06-25 | 中核四0四有限公司 | A kind of denitration fluidized bed electrically heated rod distribution apparatus |
| CN109925978A (en) * | 2017-12-18 | 2019-06-25 | 中核四0四有限公司 | A kind of denitration fluidized bed fluidized gas distribution and device for discharging |
-
2013
- 2013-05-31 CN CN 201320308173 patent/CN203355709U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109925872A (en) * | 2017-12-18 | 2019-06-25 | 中核四0四有限公司 | A kind of denitration fluidized bed electrically heated rod distribution apparatus |
| CN109925978A (en) * | 2017-12-18 | 2019-06-25 | 中核四0四有限公司 | A kind of denitration fluidized bed fluidized gas distribution and device for discharging |
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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: 20131225 Termination date: 20190531 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |