CN217210091U - Drying device for wet waste of nuclear power station - Google Patents
Drying device for wet waste of nuclear power station Download PDFInfo
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- CN217210091U CN217210091U CN202220849593.9U CN202220849593U CN217210091U CN 217210091 U CN217210091 U CN 217210091U CN 202220849593 U CN202220849593 U CN 202220849593U CN 217210091 U CN217210091 U CN 217210091U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The utility model provides a drying device for wet wastes of a nuclear power station, which comprises a cylinder body; the upper end of the cylinder is opened; the cylinder comprises a first grid cylinder, a second grid cylinder and an outer cylinder which are concentrically arranged from inside to outside in sequence; the lower end of the outer cylinder body is provided with a sealing surface; a cavity with a circular cross section is formed between the first grid cylinder and the second grid cylinder; a base is arranged at the bottom of the cavity; the base comprises an annular grid surface and a bracket arranged at the bottom of the annular grid surface; the base is arranged on the upper part of the sealing surface. The utility model provides a drying device has increased the heat transfer area of hot and dry air and wet wastes material, can show the drying efficiency who improves wet wastes material, can improve the drying efficiency of the wet wastes material of unit throughput more than about 200%, and the drying time of the wet wastes material of single processing is within 3 hours.
Description
Technical Field
The utility model relates to a nuclear waste treatment equipment technical field especially relates to a drying device of wet wastes material of nuclear power station.
Background
Wet waste with low and medium levels of radioactivity, mainly including concentrate and waste resins, is generated during the operation of nuclear power plants. On the premise of ensuring radiation safety, the radioactive wet waste can be subjected to volume reduction treatment by adopting a drying technology, and moisture contained in the radioactive wet waste is vaporized and discharged, so that the purposes of reducing the humidity of the waste and reducing the volume of the waste are achieved, and meanwhile, the dry waste suitable for long-term storage and disposal can be obtained.
In daily production of nuclear power plants, wet wastes generated by a nuclear island plant are loaded into a 200L steel barrel by nuclear island workers and are transported to a radioactive waste plant at the side of the nuclear island, then the wet wastes are transported to a waste treatment facility (SRTF) through a waste transport vehicle, then the wet wastes are unloaded and transported into an oven through a manual hydraulic forklift of a wet waste system, drying is carried out by adopting dry hot air, and the dried solid wastes are compressed or temporarily stored (temporarily stored). And when the liquid level of the condensate generated in the drying process reaches a certain height, discharging the condensate into a drainage discharge tank of the SRTF extra-low water system. In the above drying process, since the wet waste is relatively dense in the tub, heat is transferred to the wet waste through the side and bottom surfaces of the tub, and the wet waste is transferred and evaporated on the upper surface of the tub. Since the wet wastes at the side and bottom surfaces of the tub are not directly transferred to the heat but transferred through the surface of the tub and evaporation cannot occur, the evaporation can be performed only at the upper surface of the tub. Therefore, the heat transfer efficiency is very low, and one-time drying needs about 12 hours, so that the daily operation requirement of a nuclear power plant cannot be met.
CN212461164U discloses a waste drying device for a nuclear power plant, which comprises a drying box; a hollow column is fixedly connected to the central position of the bottom in the drying box; the bottom in the hollow column is rotatably connected with a rotating shaft; the peripheral side surface of the rotating shaft is fixedly sleeved with a hollow hot air column; the side surface of the periphery of the hollow hot gas column is provided with a plurality of gas guide pipes; a plurality of micropore hot air pipes are arranged on the peripheral side surface of the air duct; the micropore hot air pipe is positioned between the inner wall of the drying box and the outer wall of the hollow column; the circumferential side surface of the hollow hot gas column is provided with a gas delivery pipe; one end of the gas pipe is provided with a fan mounting mechanism; an air heater is fixedly arranged in the fan mounting mechanism. The device has a relatively complex structure, small waste loading capacity, low treatment efficiency and the need of providing additional power for the rotating shaft.
CN214476451U discloses a drying barrel for drying radioactive wet waste of a nuclear power station, which comprises a vertical ventilation column, a barrel body, a lower ventilation pore plate and an air inlet, wherein the lower ventilation pore plate is transversely arranged at the middle lower part of the internal space of the barrel body, the vertical ventilation column is vertically arranged on the lower ventilation pore plate, and the air inlet is arranged on the barrel wall at the lower part of the barrel body. The device places wet waste on the outer sides of the inner barrels, the drying area of the device is the surface of the inner barrels, the heat exchange area is small, air flow flows from top to bottom, and the utilization rate and the drying efficiency of hot air are low.
Therefore, the drying device which has higher drying efficiency and is suitable for the wet waste of the nuclear power station is of great significance.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims to provide a drying device of wet wastes material of nuclear power station, drying device can with the dry and hot air inlet hose connection at drying cabinet top, dry and hot air is at the drying device inner loop, and the return air inlet that last gas got into the drying cabinet bottom carries out dehumidification processing, the utility model provides a drying device has higher drying efficiency.
To achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides a drying device for wet wastes of a nuclear power station, which comprises a cylinder body; the upper end of the cylinder is opened; the cylinder comprises a first grid cylinder, a second grid cylinder and an outer cylinder which are concentrically arranged from inside to outside in sequence; the lower end of the outer cylinder body is provided with a sealing surface; a cavity with a circular cross section is formed between the first grid cylinder and the second grid cylinder; a base is arranged at the bottom of the cavity; the base comprises an annular grid surface and a bracket arranged at the bottom of the annular grid surface; the base is arranged on the upper part of the sealing surface.
The utility model provides a drying device is provided with first grid barrel, second grid barrel, outer barrel and base, the bottom of outer barrel is provided with sealed face, outer barrel is sealed 200L steel drum, first grid barrel and second grid barrel set up in the inside of outer barrel, the axial and the axial direction parallel of outer barrel, vacuole formation between first grid barrel and the second grid barrel will wet the wastes material dress and fill in the cavity, the bottom of cavity is provided with the base. In the utility model, the upper surface of the base is an annular grid surface, the inner circle profile of the annular grid surface is connected with the bottom profile of the first grid cylinder body, and the first grid cylinder body is communicated with the bottom of the outer cylinder body through the inner circle of the annular grid surface; the outer circle profile of the annular grid surface is connected with the bottom profile of the second grid cylinder, the base is used for supporting the first grid cylinder and the second grid cylinder, providing an airflow channel communicated with the outer cylinder for the first grid cylinder and providing a heat exchange surface capable of being contacted with dry hot air for the bottom of the cavity. The drying device comprises a drying device and is characterized in that dry hot air is introduced into the first grid cylinder, the dry hot air exchanges heat with wet waste in a cavity and evaporates through the side wall of the first grid cylinder, then the dry hot air reaches the bottom of the first grid cylinder and enters an outer cylinder, the dry hot air can also exchange heat with the wet waste at the bottom of the cavity through an annular grid surface and evaporates, then the dry hot air rises through a gap between the inner side wall of the outer cylinder and the outer side wall of the second grid cylinder, the dry hot air exchanges heat with the wet waste in the cavity and evaporates through the side wall of the second grid cylinder until being discharged from the upper end of the drying device, the dry hot air circulates in a U shape in the drying device, and due to the fact that the surfaces of the first grid cylinder and the second grid cylinder and the annular grid surface have grid structures, the heat exchange area can be remarkably increased, and the drying efficiency is improved. Compared with the treatment method of only placing wet wastes in a 200L steel drum (the diameter is generally 550mm), and then placing the steel drum in a drying oven, the drying time of the treatment method is about 12h, and the single drying time of the drying device provided by the utility model is within 3 h. Under general condition, the diameter of first grid barrel is 150mm, and the diameter of second grid barrel is 500mm, the utility model provides a drying device in wet waste material loading is compared and is generally reduced about one third in the steel drum, and the drying efficiency of the wet waste material of unit treatment capacity promotes more than 200% about.
Preferably, the surface of the first grid cylinder is provided with a plurality of uniformly distributed circular grid holes.
Preferably, the surface of the second grid cylinder is provided with a plurality of uniformly distributed circular grid holes.
The utility model discloses in, first grid barrel and second grid barrel are rolled up by the corrosion resistant plate that thickness is 1mm and are made and form.
Preferably, the diameter of the circular grid holes is 5-15mm, such as 5mm, 6mm, 8mm, 10mm, 12mm, 14mm or 15mm, but not limited to the recited values, and other values not recited in the range of values are equally applicable.
The utility model discloses the diameter of the circular grid hole of preferred control prevents that wet wastes material from dropping when can guarantee good drying effect at specific range.
Preferably, the outer side wall of the first grid cylinder is provided with at least one first annular reinforcing rib from top to bottom, for example, 1, 2, 3, 4, 5 or 6, but not limited to the enumerated values, and other unrecited values in the numerical range are also applicable; the axial direction of the first annular reinforcing rib is parallel to the axial direction of the first grid cylinder.
Preferably, the outer side wall of the second grid cylinder is provided with at least one second annular reinforcing rib from top to bottom, for example, 1, 2, 3, 4, 5 or 6, but not limited to the enumerated values, and other unrecited values in the numerical range are also applicable; the axial direction of the second annular reinforcing rib is parallel to the axial direction of the second grid cylinder.
The utility model discloses in, first annular strengthening rib and second annular strengthening rib are rolled up by C shaped steel muscle and are formed for prevent that first grid barrel and second grid barrel from taking place to warp.
Preferably, the annular grid surface contains a plurality of uniformly distributed circular grid holes.
Preferably, the support comprises a hollow cylindrical frame with two open ends and rectangular partition plates circumferentially arranged along the inner wall of the hollow cylindrical frame at intervals; the short edge of the rectangular partition plate is parallel to the axial direction of the hollow cylindrical frame and is connected with the inner wall of the hollow cylindrical frame; the long edge of the rectangular partition plate is arranged along the radial direction of the annular grid surface.
Preferably, the top of the first grid cylinder is provided with an adapter.
The utility model discloses in, the effect of adapter is with the upper end intercommunication of the dry and hot air inlet hose at drying cabinet top and first grid barrel.
Preferably, the adapter comprises a hollow inverted frustum structure and a hollow cylindrical structure; the lower end opening of the outer wall of the hollow inverted round table structure is communicated with the upper end opening of the outer wall of the hollow cylindrical structure; and the lower end opening of the outer wall of the hollow cylindrical structure is communicated with the upper end opening of the first grid cylinder.
The utility model provides a drying device is used for the operation process that wet wastes material was dried as follows:
(1) filling wet waste into a cavity between the first grid cylinder and the second grid cylinder, placing a drying device in a drying box, and communicating a hot and dry air inlet hose at the top of the drying box with the upper end of the first grid cylinder through an adapter;
(2) the dry hot air enters the interior of the first grid cylinder body and flows downwards, the dry hot air exchanges heat with the wet waste in the cavity through the side wall of the first grid cylinder body and is evaporated, then the dry hot air reaches the bottom of the first grid cylinder body and enters the outer cylinder body, the dry hot air can also exchange heat with the wet waste at the bottom of the cavity through the annular grid surface and is evaporated, then the dry hot air rises through a gap between the inner side wall of the outer cylinder body and the outer side wall of the second grid cylinder body, and the dry hot air exchanges heat with the wet waste in the cavity through the side wall of the second grid cylinder body and is evaporated until the dry hot air is discharged from the upper end of the drying device;
(3) and (3) the gas discharged in the step (2) enters an air return opening at the bottom of the drying box for dehumidification, and the treated gas returns to an air supply opening of the drying box and can be used as dry hot air for recycling.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the utility model provides a drying device can make the hot-air drier be "U" type circulation flow in drying device through setting up first grid barrel, second grid barrel and annular grid face to the grid structure has increased the hot-air drier and the heat transfer area of wet waste material, can show the drying efficiency who improves wet waste material, and the drying efficiency of the wet waste material of unit treatment capacity improves more than about 200%, and the drying time of the wet waste material of single processing is within 3 hours.
(2) The utility model provides a drying device simple structure, easily preparation, convenient operation can industrially promote.
Drawings
FIG. 1 is a schematic structural view of a drying apparatus according to embodiment 1 of the present invention;
fig. 2 is a schematic view of the internal structure of the outer cylinder in embodiment 1 of the present invention;
fig. 3 is a schematic view of the internal structure of the second grid cylinder in embodiment 1 of the present invention;
fig. 4 is a schematic structural view of the base in embodiment 1 of the present invention;
FIG. 5 is a schematic sectional view of a drying apparatus according to embodiment 1 of the present invention;
in the figure: 1-a first grid cylinder; 2-a second grid cylinder; 3-outer cylinder; 4-sealing surface; 5-ring grid surface; 6-a scaffold; 7-a first annular reinforcing rib; 8-a second annular reinforcing rib; 9-adapter.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
The present invention will be described in further detail below. However, the following examples are only simple examples of the present invention, and do not represent or limit the scope of the present invention, which is defined by the appended claims.
It is to be understood that in the description of the present invention, the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for the purpose of convenience and simplicity of description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
It should be noted that, unless explicitly stated or limited otherwise, the terms "disposed," "connected" or "connected" in the description of the present invention are to be construed broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
It should be understood that the present invention includes the necessary pipeline, conventional valve and general pump equipment for realizing the complete process, but the above contents do not belong to the main invention point of the present invention, and the skilled person can select the type based on the process flow and the equipment structure to add the layout by himself, and the present invention does not have the special requirement and limitation.
Example 1
The embodiment provides a drying device for wet waste of a nuclear power station, which is shown in a schematic structural diagram in fig. 1 and comprises a cylinder body; the upper end of the cylinder is opened; the schematic sectional structure diagram of the drying device is shown in fig. 5, and the cylinder comprises a first grid cylinder 1, a second grid cylinder 2 and an outer cylinder 3 which are concentrically arranged from inside to outside in sequence; the diameter of the outer cylinder body 3 is 550mm, the size and the volume of the outer cylinder body are consistent with those of a 200L steel drum, the diameter of the first grid cylinder body 1 is 150mm, and the diameter of the second grid cylinder body 2 is 500 mm; the lower end of the outer cylinder body 3 is provided with a sealing surface 4; the schematic internal structure diagram of the outer cylinder 3 and the schematic internal structure diagram of the second grid cylinder 2 are shown in fig. 2-3, and a cavity with a circular cross section is formed between the first grid cylinder 1 and the second grid cylinder 2; a base is arranged at the bottom of the cavity; the base comprises an annular grid surface 5 and a bracket 6 arranged at the bottom of the annular grid surface 5; the base is arranged on the upper part of the sealing surface 4;
the surface of the first grid cylinder 1 is provided with a plurality of uniformly distributed circular grid holes; the surface of the second grid cylinder 2 is provided with a plurality of uniformly distributed circular grid holes; the diameter of the circular grid hole is 10 mm; the outer side wall of the first grid cylinder 1 is sequentially provided with 4 first annular reinforcing ribs 7 from top to bottom; the axial direction of the first annular reinforcing rib 7 is parallel to the axial direction of the first grid cylinder 1; the outer side wall of the second grid cylinder 2 is sequentially provided with 6 second annular reinforcing ribs 8 from top to bottom; the axial direction of the second annular reinforcing rib 8 is parallel to the axial direction of the second grid cylinder 2;
the structural schematic diagram of the base is shown in fig. 4, and the annular grid surface 5 includes a plurality of uniformly distributed circular grid holes; the support 6 comprises a hollow cylindrical frame with two open ends and rectangular partition plates arranged at intervals along the circumferential direction of the inner wall of the hollow cylindrical frame; the short edge of the rectangular partition plate is parallel to the axial direction of the hollow cylindrical frame and is connected with the inner wall of the hollow cylindrical frame; the long edge of the rectangular partition plate is arranged along the radial direction of the annular grid surface 5;
the top of the first grid cylinder 1 is provided with an adapter 9; the adapter 9 comprises a hollow inverted frustum structure and a hollow cylindrical structure; an opening at the lower end of the outer wall of the hollow inverted circular truncated cone structure is communicated with an opening at the upper end of the outer wall of the hollow cylindrical structure; and the lower end opening of the outer wall of the hollow cylindrical structure is communicated with the upper end opening of the first grid cylinder body 1.
The embodiment of the utility model provides a drying device is used for the operation process that wet waste dried as follows:
(1) filling wet waste into a cavity between the first grid cylinder 1 and the second grid cylinder 2, placing a drying device in a drying box, and communicating a hot and dry air inlet hose at the top of the drying box with the upper end of the first grid cylinder 1 through an adapter 9;
(2) the dry hot air enters the interior of the first grid cylinder 1 and flows downwards, the dry hot air exchanges heat with the wet waste in the cavity through the side wall of the first grid cylinder 1 and evaporates, then the dry hot air reaches the bottom of the first grid cylinder 1 and enters the outer cylinder 3, the dry hot air can also exchange heat with the wet waste at the bottom of the cavity through the annular grid surface 5 and evaporates, then the dry hot air rises through a gap between the inner side wall of the outer cylinder 3 and the outer side wall of the second grid cylinder 2, and the dry hot air exchanges heat with the wet waste in the cavity through the side wall of the second grid cylinder 2 and evaporates until being discharged from the upper end of the drying device;
(3) and (3) the gas discharged in the step (2) enters an air return opening at the bottom of the drying box for dehumidification, and the treated gas returns to an air supply opening of the drying box and can be used as dry hot air for recycling.
Adopt the drying device that this embodiment provided to dry, compare in the drying method of packing into wet wastes material and putting into the drying cabinet in 200L's steel drum (the diameter and the height of steel drum are the same with outer barrel), to the same wet wastes material, the utility model provides a drying device can promote more than 200% with the drying efficiency of the wet wastes material of unit treatment volume.
To sum up, the utility model provides a drying device can make hot and dry air be "U" type circulation flow in drying device through setting up first grid barrel, second grid barrel and annular grid face to the grid structure has increased hot and dry air and wet waste's heat transfer area, can show the drying efficiency who improves wet waste.
The applicant states that the above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and those skilled in the art should understand that any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present invention are within the protection scope and the disclosure scope of the present invention.
Claims (10)
1. A drying apparatus for wet waste of a nuclear power plant, characterized in that the drying apparatus comprises a barrel;
the upper end of the cylinder is opened;
the cylinder comprises a first grid cylinder, a second grid cylinder and an outer cylinder which are concentrically arranged from inside to outside in sequence;
the lower end of the outer cylinder body is provided with a sealing surface;
a cavity with a circular cross section is formed between the first grid cylinder and the second grid cylinder;
a base is arranged at the bottom of the cavity;
the base comprises an annular grid surface and a bracket arranged at the bottom of the annular grid surface;
the base is arranged on the upper part of the sealing surface.
2. The drying apparatus for nuclear power plant wet waste according to claim 1, wherein the surface of the first grid cylinder is provided with a plurality of uniformly distributed circular grid holes.
3. The drying apparatus for nuclear power plant wet waste according to claim 1, wherein the surface of the second grid cylinder is provided with a plurality of uniformly distributed circular grid holes.
4. The drying apparatus for nuclear power plant wet waste according to claim 2 or 3, wherein the diameter of the circular grid holes is 5-15 mm.
5. The drying apparatus for nuclear power plant wet waste according to claim 1, wherein the outer side wall of the first grid cylinder is provided with at least one first annular reinforcing rib in sequence from top to bottom;
the axial direction of the first annular reinforcing rib is parallel to the axial direction of the first grid cylinder.
6. The drying device for nuclear power plant wet waste as defined in claim 1, wherein the outer side wall of the second grid cylinder is provided with at least one second annular reinforcing rib in sequence from top to bottom;
the axial direction of the second annular reinforcing rib is parallel to the axial direction of the second grid cylinder.
7. The nuclear power plant wet waste drying apparatus of claim 1, wherein the annular grid surface includes a plurality of uniformly distributed circular grid holes.
8. The nuclear power plant wet waste drying device of claim 1, wherein the rack includes a hollow cylindrical frame opened at both ends and rectangular partitions disposed at intervals in a circumferential direction along an inner wall of the hollow cylindrical frame;
the short edge of the rectangular partition plate is parallel to the axial direction of the hollow cylindrical frame and is connected with the inner wall of the hollow cylindrical frame;
the long edge of the rectangular partition plate is arranged along the radial direction of the annular grid surface.
9. The nuclear power plant wet waste drying apparatus of claim 1, wherein an adapter is provided on the top of the first grid cylinder.
10. The nuclear power plant wet waste drying apparatus of claim 9, wherein the adapter includes a hollow inverted circular truncated structure and a hollow cylindrical structure;
the lower end opening of the outer wall of the hollow inverted round table structure is communicated with the upper end opening of the outer wall of the hollow cylindrical structure;
and the lower end opening of the outer wall of the hollow cylindrical structure is communicated with the upper end opening of the first grid cylinder.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220849593.9U CN217210091U (en) | 2022-04-13 | 2022-04-13 | Drying device for wet waste of nuclear power station |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220849593.9U CN217210091U (en) | 2022-04-13 | 2022-04-13 | Drying device for wet waste of nuclear power station |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115597332A (en) * | 2022-10-25 | 2023-01-13 | 中广核工程有限公司（Cn） | Drying device and drying method |
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- 2022-04-13 CN CN202220849593.9U patent/CN217210091U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115597332A (en) * | 2022-10-25 | 2023-01-13 | 中广核工程有限公司（Cn） | Drying device and drying method |
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