CN113270211A - Multi-section control drum for horizontal reactor - Google Patents
Multi-section control drum for horizontal reactor Download PDFInfo
- Publication number
- CN113270211A CN113270211A CN202110333078.5A CN202110333078A CN113270211A CN 113270211 A CN113270211 A CN 113270211A CN 202110333078 A CN202110333078 A CN 202110333078A CN 113270211 A CN113270211 A CN 113270211A
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- China
- Prior art keywords
- control drum
- transmission shaft
- cladding
- section
- annular graphite
- 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.)
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Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 45
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 41
- 238000005253 cladding Methods 0.000 claims abstract description 38
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 30
- 239000010439 graphite Substances 0.000 claims abstract description 30
- 230000009257 reactivity Effects 0.000 claims abstract description 6
- 230000007246 mechanism Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 239000006096 absorbing agent Substances 0.000 abstract description 3
- 238000003466 welding Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000004992 fission Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C7/00—Control of nuclear reaction
- G21C7/06—Control of nuclear reaction by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section
- G21C7/08—Control of nuclear reaction by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section by displacement of solid control elements, e.g. control rods
- G21C7/10—Construction of control elements
-
- 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
Abstract
The invention relates to a multi-section control drum for a horizontal reactor, which comprises a plurality of sections of annular graphite components sleeved on a transmission shaft, wherein a control drum main body is arranged in each section of annular graphite component, the control drum main body comprises an inner cladding and an outer cladding, the outer cladding is supported on the annular graphite components, the inner cladding is connected with the transmission shaft and is driven by the transmission shaft to rotate, B4The C plate rotates along with the inner cladding, and the reactivity of the reactor core is adjusted. The annular graphite assembly fills the interior of the control drum, so that the space of the control drum is fully utilized, and the moderating effect of the reactor is ensured; the length of each section of cladding is reduced due to the multi-section design, so that the weight of each section of control drum is reduced, and the torque of the cladding is reduced; the weight of the transmission shaft, the control drum cladding and the absorber core block is borne through multi-point support, so that the structural failure caused by excessive deflection generated in the long life is avoided; graphite powder is filled between the inner cladding and the outer cladding of the control drum, so that friction loss is reduced, and the service life of the control drum is prolonged.
Description
Technical Field
The invention belongs to the design of a horizontal reactor control device, and particularly relates to a multi-section control drum for a horizontal reactor.
Background
Nuclear reactors are devices that can maintain a controlled, self-sustaining, chain-type nuclear fission reaction to achieve nuclear energy utilization. Currently, most reactors are designed vertically, but they are generally tall and not easy to arrange. Therefore, a horizontal core solution is proposed. Compared with a vertical reactor core, the horizontal reactor core has shorter height, is more convenient to arrange, can even meet the design requirement of a movable reactor, and has obvious advantages.
As a container structure of the neutron absorber core block, most of the traditional reactors adopt a structural form of a control rod, but the overall design size of the control rod is larger because the control rod needs to have the fully proposed conditions. Compared with a control rod, the control drum can save the design size of the axial direction of the reactor core in the reactivity adjusting process, thereby reducing the total size of the whole reactor. On the other hand, the control drum is generally arranged in the reflecting layer, so that the control drum can also play a certain beneficial role in shielding radiation, thereby reducing the total arrangement amount of the radiation shielding layer and reducing the size and the weight of the reactor.
In the horizontal pile scheme, the control drum is usually designed in a horizontal mode, so that the control drum needs to bear deflection generated by the self weight without structural damage. In addition, the arrangement of the control drum reduces the moderating dose, which causes a problem of poor reactor moderating effect.
Disclosure of Invention
The invention aims to provide a multi-section control drum for a horizontal reactor, which overcomes the defects of the prior art that the arrangement of the control drum causes the excessive reduction of moderating dosage to cause poor moderating effect of the reactor, overcomes the influence problem of gravity action on the control drum and a driving shaft, and avoids the generation of excessive deflection to cause structural failure and even endanger the safety of the reactor.
The technical scheme of the invention is as follows: a multi-section control drum for a horizontal reactor comprises a multi-section annular graphite assembly sleeved on a transmission shaft, a control drum main body is arranged in each section of the annular graphite assembly and comprises an inner cladding and an outer cladding, the outer cladding is supported on the annular graphite assembly, the inner cladding is connected with the transmission shaft and driven by the transmission shaft to rotate, and B4The C plate is arranged on the inner cladding and rotates together with the inner cladding, so that the reactivity of the reactor core is adjusted.
Further, the horizontal multi-segment control drum for the reactor is characterized in that the section of the annular graphite assembly is E-shaped, the middle transverse protruding portion is inserted into the inner shell of the control drum main body, a support plate is arranged on the other side opposite to the middle transverse protruding portion, a hole for the transmission shaft to pass through is arranged on the support plate, and a wear-resistant ring is arranged between the transmission shaft and the hole.
Further, the multi-section control drum for the horizontal reactor is characterized in that a gap is reserved between the outer casing of the control drum main body and the transmission shaft and does not rotate along with the transmission shaft.
Further, according to the multi-section control drum for the horizontal reactor, one side of the inner casing of the control drum main body is welded with the transmission shaft, and the other side of the inner casing is sleeved on the middle transverse protruding part of the annular graphite assembly.
Further, the multi-segment control drum for horizontal reactor as described above, wherein the inner casing of the control drum main body is provided with B4C chamber, said B4The C plate is arranged at the B4C, containing the cavity. B is4The C plate is an arc plate.
Further, the multi-section control drum for the horizontal reactor is characterized in that graphite powder is filled between the inner cladding and the outer cladding of the control drum main body.
Further, the multi-section control drum for the horizontal reactor as described above, wherein one end of the transmission shaft is connected to the driving mechanism, and the other end is supported by a bearing.
The invention has the following beneficial effects:
(1) the invention creates technical conditions for the design of the control drum of the horizontal reactor; structurally, the graphite assembly and the control drum are assembled into a whole, the annular graphite assembly is filled in the control drum, the space of the annular graphite assembly is fully utilized, and the moderating effect of the reactor is ensured.
(2) The multi-section design of the invention reduces the length of each section of the cladding, thereby reducing the weight of each section of the control drum, reducing the friction force and the moment which need to be overcome by the rotation of the control drum, reducing the torque of the cladding, reducing the stress born by the cladding in the service life and being less prone to structural failure.
(3) The transmission shaft is supported by the support plate and the graphite assembly at each section of the control drum, so that multi-point support is realized in the full axial direction to bear the weight of the transmission shaft, the control drum cladding and the absorber core block, and structural failure caused by excessive deflection generated in the long service life is avoided.
(4) The invention considers the influence of friction force on the service life of the control drum, the wear-resisting ring is arranged between the supporting plate and the transmission shaft, and graphite powder is filled between the inner wrapping shell and the outer wrapping shell of the control drum, so that the friction loss is reduced, and the service life of the control drum is prolonged.
(5) The invention has stronger adaptability to the horizontal reactor and easy arrangement, has larger diameter adjustable range and flexible axial arrangement unit number adjustment on the premise of ensuring the moderation performance compared with the traditional control drum structure, has obvious advantages on the miniaturization of the whole reactor, and can be widely applied to the horizontal reactors of various models.
Drawings
FIG. 1 is a schematic diagram of the overall layout of a multi-segment control drum for a horizontal reactor according to an embodiment of the present invention;
FIG. 2 is a schematic axial sectional view of each segment of the annular graphite assembly assembled with the control drum body according to an embodiment of the present invention;
FIG. 3 is a radial cross-sectional structural view of each segment of the annular graphite assembly assembled with the control drum body according to an embodiment of the present invention.
In the figure, 1, an annular graphite assembly; 2. a support plate; 3. a wear ring; 4. a drive shaft; 5. a control drum main body; 51. an inner envelope; 52. an outer envelope; 53.B4A cavity C; 54.B4C, plate; 55. graphite powder; 6. an upper reflective layer; 7. and a lower reflective layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, a schematic diagram of an overall layout structure of a horizontal multi-node control drum for a reactor according to an embodiment of the present invention includes: annular graphite subassembly 1, backup pad 2, wear-resisting ring 3, transmission shaft 4 and control drum main part 5. Wherein each section of control drum main body 5 structurally comprises: inner cladding 51, outer cladding 52, B4 C containing chamber 53, B4C plate 54 and graphite powder 55. The control drums of all sections are rotated by a transmission shaft 4, one end of the transmission shaft 4 is connected with a driving mechanism, and the other end of the transmission shaft is supported by a bearing. An upper reflective layer 6 and a lower reflective layer 7 are respectively arranged at two ends of the integral control drum. Each section of the annular graphite assembly 1 is similar to an E-shaped section structure, and a single-side middle transverse projection is inserted into each section of the control drum main body 5. The other side relative to the middle transverse protruding part is provided with a supporting plate 2, the supporting plate 2 is provided with a pore channel provided with a wear-resistant ring 3 and matched with a transmission shaft 4, and therefore the transmission shaft 4 is axially supported at multiple points. Because the wear-resistant ring 3 needs to bear load and has higher long-term service stress, the material of the wear-resistant ring has higher high-temperature strength, wear resistance, smaller creep deformation, smaller thermal shock resistance and thermal expansion, and can be selected from SiC and Al2O3And the like. The outer casing 52 of each section of control drum main body 5 is supported by the annular graphite component 1, and a gap is reserved between the outer casing and the transmission shaft 4 and does not rotate along with the transmission shaft 4. The inner casing 51 is welded at one side to the propeller shaft 4, thereby achieving a driving torque. Graphite powder 55 is filled between the inner cladding 51 and the outer cladding 52 in order to reduce the friction loss between the two. In the structure of the control drum main body 5 of each segment, B4The C-chamber 53 is arranged on the inner envelope 51, inArc B is arranged between4The C-plate 54 rotates as the inner cladding 51 rotates, thereby achieving a regulation effect on the core reactivity.
At the time of assembly, the assembly sequence of the control drum main body 5 and the transmission shaft 4 for each joint is as follows:
1) fixing the position of the transmission shaft 4, positioning and welding the inner package shell 51 of the control drum on the transmission shaft 4;
2) sleeving an outer casing 52 of the control drum into an inner casing 51 (an end cover at one side of the outer casing 52 needs to be sleeved and then welded with the outer casing structure into a whole, and graphite powder 55 needs to be filled into a cavity between the outer casing 52 and the inner casing 51 before welding) and positioning;
3) inserting the middle transverse convex part of the annular graphite component 1 into the inner and outer wrapping shells;
4) a wear-resistant ring 3 and a support plate 2 are arranged;
5) and repeating the steps 1-4 to finish the assembly of all the sections.
During normal operation, the whole multi-section control drum is inserted into a hole channel of the control drum, and the hole channel plays a role in supporting and positioning the annular graphite assembly 1. Two ends of the transmission shaft 4 are supported by the driving mechanism and the bearing support, the middle part of the transmission shaft is supported by the plurality of supporting plates 2, the supporting plates 2 transmit force to the annular graphite component 1, and finally, the force is applied to the pore channel.
For each section of the control drum main body 5, a gap is left between the outer casing 52 and the transmission shaft 4, and the applied gravity is transmitted to the annular graphite assembly 1 through the lowest side to realize support (the graphite powder 55 is filled between the annular graphite assembly and the annular graphite assembly). The inner cladding 51 is welded with the transmission shaft 4 and is welded with the B4C Chamber 53 and B4The weight of the C-plate 54 is applied to the drive shaft 4.
Need to adjust B in the control drum4C the angle of the plate 54, the drive shaft 4 is rotated by applying torque from the single-sided drive mechanism. Since the inner shell 51 of each control drum main body 5 is welded to the transmission shaft 4, torque is transmitted to the inner shell 51 to rotate with the transmission shaft 4, so that the torque is fixed to the inner shell B4B in C chamber 534The C-plate 54 provides rotational adjustment and thus adjustment of the reactivity of the reactor.
In the above adjustment process, friction exists between the transmission shaft 4 and the support plate 2 and between the inner shell 51 and the outer shell 52 of the control drum. For the former, the friction force is reduced through the wear-resisting ring, so that on one hand, the maximum stress generated by the torque of the driving mechanism borne by the transmission shaft 4 is reduced, on the other hand, the friction loss of the transmission shaft 4 and the supporting plate 2 is reduced, and the service life of the transmission shaft is prolonged. For the latter, the friction force between the inner and outer cladding shells is reduced by the graphite powder 55 filled between the inner and outer cladding shells, so that on one hand, the maximum stress of the welding seam between the inner cladding shell 51 and the transmission shaft 4 during rotation is reduced, the connection failure is avoided, on the other hand, the friction loss of the inner and outer cladding shells is reduced, and the service life is prolonged.
Under the normal operation condition of the reactor, the environmental temperature of the control drum may reach 700 ℃; the temperature of the control drum can reach more than 1000 ℃ under the accident condition, so that the metal structural material of the control drum is made of high-temperature-resistant nickel-based alloy with good high-temperature endurance, and a full-penetration welding mode is needed at a welding seam; in order to prevent the mutual occlusion and adhesion of metal contact surface materials in a high-temperature environment, different grades of materials for solid lubrication treatment are selected for adjacent metal contact surfaces so as to keep the flexibility of each sliding fit surface.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. The multi-section control drum for the horizontal reactor is characterized by comprising a plurality of sections of annular graphite components (1) sleeved on a transmission shaft (4), wherein a control drum main body (5) is arranged in each section of the annular graphite component (1), the control drum main body (5) comprises an inner cladding (51) and an outer cladding (52), the outer cladding (52) is supported on the annular graphite components (1), the inner cladding (51) is connected with the transmission shaft (4) and is driven by the transmission shaft (4) to rotate, B4The C plate (54) is arranged on the inner cladding (51) and rotates together with the inner cladding (51) to realize the regulation of the reactivity of the reactor core.
2. A horizontal multi-segment control drum for a reactor according to claim 1, wherein the annular graphite assembly (1) has an E-shaped cross-section, a central transverse projection is inserted into the inner shell (51) of the control drum body, a support plate (2) is provided on the other side with respect to the central transverse projection, the support plate (2) is provided with a hole for the transmission shaft (4) to pass through, and a wear-resistant ring (3) is provided between the transmission shaft (4) and the hole.
3. A multi-segment control drum for a horizontal reactor according to claim 1 or 2, wherein a gap is left between the outer casing (52) of the control drum body and the drive shaft (4) and does not rotate with the drive shaft.
4. A multi-segment control drum for a horizontal reactor according to claim 1 or 2, wherein the inner shell (51) of the control drum body is welded to the transmission shaft (4) on one side and is fitted over the middle transverse projection of the annular graphite assembly (1) on the other side.
5. A multi-segment control drum for a horizontal reactor according to claim 1 or 2, wherein the inner shell (51) of the control drum body is provided with B4C volume (53), B4The C plate (54) is arranged at the B4The C is arranged in the cavity (53).
6.The multi-segment control drum for a horizontal reactor according to claim 5, wherein B is4The C plate (54) is an arc-shaped plate.
7. A multi-segment control drum for a horizontal reactor according to claim 1 or 2, wherein graphite powder (55) is filled between the inner shell (51) and the outer shell (52) of the control drum body.
8. A multi-segment control drum for a horizontal reactor according to claim 1 or 2, wherein the transmission shaft (4) is connected to a driving mechanism at one end and supported by a bearing at the other end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110333078.5A CN113270211B (en) | 2021-03-29 | 2021-03-29 | Multisection type control drum for horizontal reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110333078.5A CN113270211B (en) | 2021-03-29 | 2021-03-29 | Multisection type control drum for horizontal reactor |
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| Publication Number | Publication Date |
|---|---|
| CN113270211A true CN113270211A (en) | 2021-08-17 |
| CN113270211B CN113270211B (en) | 2023-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110333078.5A Active CN113270211B (en) | 2021-03-29 | 2021-03-29 | Multisection type control drum for horizontal reactor |
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| Country | Link |
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| CN (1) | CN113270211B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114220563A (en) * | 2021-11-09 | 2022-03-22 | 中国核电工程有限公司 | Multi-stage supporting type multi-section control drum for horizontal reactor |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3932215A (en) * | 1970-11-28 | 1976-01-13 | Interatom Internationale Atomreaktorbau Gmbh | Vertical control rod for rapid and safe shut-off of nuclear reactors |
| EP0229030A1 (en) * | 1986-01-07 | 1987-07-15 | Westinghouse Electric Corporation | Nuclear reactor control rod with anually uniform changeable worth |
| US5032349A (en) * | 1986-01-22 | 1991-07-16 | Hochtemperatur-Reaktorbau Gmbh | Shutdown of a high temperature reactor |
| CN103456374A (en) * | 2013-09-03 | 2013-12-18 | 清华大学 | Reactivity control method of pebble-bed high-temperature gas cooled reactor and telescopiform control rod |
| CN103871487A (en) * | 2014-03-26 | 2014-06-18 | 清华大学 | Graphite guide pipe for high-temperature gas cooled reactor |
| CN109192329A (en) * | 2018-11-01 | 2019-01-11 | 中国原子能科学研究院 | A kind of heat pipe type double mode nuclear reactor for space reactor core |
| CN110189836A (en) * | 2019-06-04 | 2019-08-30 | 中国原子能科学研究院 | A kind of long-distance transmission control pile reactivity device |
| US20210082587A1 (en) * | 2019-09-17 | 2021-03-18 | BWXT Advanced Technologies LLC | Control drum system for use with nuclear reactors |
-
2021
- 2021-03-29 CN CN202110333078.5A patent/CN113270211B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3932215A (en) * | 1970-11-28 | 1976-01-13 | Interatom Internationale Atomreaktorbau Gmbh | Vertical control rod for rapid and safe shut-off of nuclear reactors |
| EP0229030A1 (en) * | 1986-01-07 | 1987-07-15 | Westinghouse Electric Corporation | Nuclear reactor control rod with anually uniform changeable worth |
| US5032349A (en) * | 1986-01-22 | 1991-07-16 | Hochtemperatur-Reaktorbau Gmbh | Shutdown of a high temperature reactor |
| CN103456374A (en) * | 2013-09-03 | 2013-12-18 | 清华大学 | Reactivity control method of pebble-bed high-temperature gas cooled reactor and telescopiform control rod |
| CN103871487A (en) * | 2014-03-26 | 2014-06-18 | 清华大学 | Graphite guide pipe for high-temperature gas cooled reactor |
| CN109192329A (en) * | 2018-11-01 | 2019-01-11 | 中国原子能科学研究院 | A kind of heat pipe type double mode nuclear reactor for space reactor core |
| CN110189836A (en) * | 2019-06-04 | 2019-08-30 | 中国原子能科学研究院 | A kind of long-distance transmission control pile reactivity device |
| US20210082587A1 (en) * | 2019-09-17 | 2021-03-18 | BWXT Advanced Technologies LLC | Control drum system for use with nuclear reactors |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114220563A (en) * | 2021-11-09 | 2022-03-22 | 中国核电工程有限公司 | Multi-stage supporting type multi-section control drum for horizontal reactor |
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