CN119656996A - Distribution plate, fluidized bed reactor and overhaul and maintenance method - Google Patents
Distribution plate, fluidized bed reactor and overhaul and maintenance method Download PDFInfo
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- CN119656996A CN119656996A CN202510056428.6A CN202510056428A CN119656996A CN 119656996 A CN119656996 A CN 119656996A CN 202510056428 A CN202510056428 A CN 202510056428A CN 119656996 A CN119656996 A CN 119656996A
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Abstract
本发明公开了一种分配盘、沸腾床反应器及检修维护方法，其中分配盘包括具有多个分配孔的主盘体以及与主盘体可拆卸式连接的封堵机构，主盘体上设置有用于协助检修及维护的穿行通道，穿行通道贯穿主盘体，封堵机构可拆卸地嵌装在到穿行通道中。封堵机构包括至少一个中部镂空的探视管，探视管用于协助内窥镜观察主盘体上方的沉积物堆积情况。本发明技术方案提供的分配盘能够通过将内窥镜穿过探视管对内部沉积物的堆积进行预先观察，符合安全条件后将封堵机构打开，作业人员即可从穿行通道进入以进行检修维护，不再需要从沸腾床反应器上端进入，大大提高了作业人员的安全性。
The present invention discloses a distribution plate, an ebullated bed reactor and an inspection and maintenance method, wherein the distribution plate includes a main plate body with a plurality of distribution holes and a blocking mechanism detachably connected to the main plate body, and the main plate body is provided with a passage for assisting inspection and maintenance, the passage runs through the main plate body, and the blocking mechanism is detachably embedded in the passage. The blocking mechanism includes at least one viewing tube with a hollow middle portion, and the viewing tube is used to assist an endoscope in observing the accumulation of sediments above the main plate body. The distribution plate provided by the technical solution of the present invention can pre-observe the accumulation of internal sediments by passing an endoscope through the viewing tube, and the blocking mechanism can be opened when safety conditions are met, so that operators can enter from the passage for inspection and maintenance, and no longer need to enter from the upper end of the ebullated bed reactor, thereby greatly improving the safety of operators.
Description
Technical Field
The invention relates to the technical field of ebullated bed reactors, in particular to a distribution plate, an ebullated bed reactor and an overhaul and maintenance method.
Background
The ebullated bed reactor is a device for realizing the mixing, mass transfer and heat transfer between solid particles and gas phase and liquid phase, and is a common reactor in industry. In recent years, along with the vigorous development of devices such as coal-to-liquid chemical industry, petrochemical industry and the like in China, the fluidized bed reactor technology is widely applied, a distribution plate is used as a core inner member of the fluidized bed reactor and is generally arranged at the lower part of the fluidized bed reactor, fresh feed at the bottom of the fluidized bed reactor is uniformly distributed, and materials in the reactor are subjected to hydrogenation reaction in a uniform boiling state. The ebullated bed reactor generally contains solid particles in the reaction materials, so that the situation that the distribution plate is blocked by the deposition of the solid particles easily occurs in the production operation process, the reaction cannot be maintained after the blockage, and shutdown maintenance is required and the sediment on the upper part of the distribution plate is cleaned.
At present, the common distribution plate mainly has two forms, one is a full-bubble-cap structure type distribution plate, the other is a bubble-cap return pipe structure type distribution plate, when the distribution plate is stopped, overhauled and cleaned to remove sediment on the upper part of the distribution plate, operators and tools generally need to enter from a manhole at the top of the reactor, the cleaned sediment needs to be transported out from the top, the replacement and cooling time of the reactor is long, the operators have larger safety risks when entering for the first time, the operation procedure is complex, great inconvenience is brought to overhauling work, and the overhauling time and cost are greatly increased.
Because the structure of distribution plate among the prior art can not supply the operation personnel to walk through, when carrying out maintenance work, need the operation personnel to enter into the top of distribution plate from the upper end of ebullated bed reactor, the operation degree of difficulty is big, maintenance inefficiency and security are low. Therefore, it is necessary to provide a distribution plate capable of reducing the maintenance difficulty and improving the safety of operators.
Disclosure of Invention
The invention aims to overcome the defects of high operation difficulty, low overhaul efficiency and low safety of the overhaul of a distribution plate in the prior art, and provides the distribution plate, the ebullated bed reactor and the overhaul maintenance method, wherein by improving the structure of the distribution plate, operators can observe the accumulation condition of sediment in the ebullated bed reactor in advance by passing an endoscope through an inspection tube, so that the operators are prevented from being buried by the sediment when opening a plugging mechanism, and the internal gas environment of the ebullated bed reactor can be detected and analyzed by the inspection tube, so that the operators can enter the ebullated bed reactor under the safety condition. After meeting the safety conditions, the plugging mechanism is opened, operators can enter from the passing channel to carry out overhauling and maintenance, and the operators do not need to enter from the upper end of the ebullated bed reactor, so that the safety of the operators is greatly improved.
The invention provides a distribution plate, which comprises a main plate body with a plurality of distribution holes and a plugging mechanism detachably connected with the main plate body, wherein a passage channel for assisting in overhauling and maintenance is arranged on the main plate body, the passage channel penetrates through the main plate body, and the plugging mechanism is detachably embedded in the passage channel;
the plugging mechanism comprises at least one exploring tube with a hollowed middle part, and the exploring tube is used for assisting an endoscope in observing sediment accumulation conditions above the main tray body.
In one optional technical scheme, the through passage is located at the center of the main tray body, and a plurality of first mounting holes for mounting the bubble cap component and at least one drain pipe opening for connecting a drain pipe are formed in the main tray body.
In one optional technical scheme, the exploring tube is a straight tube or a bent tube penetrating through the plugging mechanism and with the upper end extending upwards, and the exploring tube is further used for achieving gas replacement and gas cooling.
In one optional technical scheme, the lower end of the exploring tube is provided with a port flange, the plugging mechanism further comprises a sealing cover which is used for completely plugging the opening at the lower end of the exploring tube and connected with the port flange, and the inside of the exploring tube is filled with filling materials.
In one optional technical scheme, the plugging mechanism comprises a plugging cylinder section and a bubble cap assembly arranged on the upper surface of the plugging cylinder section, and the lower end of the exploring tube is fixedly connected with the middle part of the upper surface of the plugging cylinder section.
In one optional technical scheme, the plugging mechanism further comprises an upper cover connected with the upper surface of the plugging shell ring and a lower cover connected with the lower surface of the plugging shell ring, and the upper cover and the lower cover are respectively connected with the upper surface and the lower surface of the main disc body so as to limit the plugging shell ring in the passing channel.
In one optional technical scheme, the upper cover is connected with the upper surface of the plugging shell ring through an upper fastening piece, the periphery of the upper cover is clamped with the upper end opening of the passing channel, and the lower cover is connected with the lower surface of the main disc body through a lower fastening piece.
In one optional technical scheme, a fixing flange used for being connected with the lower cover is arranged at the opening of the lower end of the main disc body, which is located in the passing channel.
The technical scheme of the invention provides an ebullated bed reactor, which comprises a reactor main body, wherein any one of the distribution plates is arranged in the reactor main body.
The technical scheme of the invention provides a overhauling and maintaining method for any distribution plate, which comprises the following steps:
passing the endoscope through the exploring tube from the upward direction to observe the accumulation height of the sediment above the main tray body;
If the accumulation height of the sediment does not exceed the safety height threshold, acquiring the internal gas of the ebullated bed reactor through the exploring tube;
Analyzing the internal gas to obtain a gas analysis result;
if the gas analysis result is qualified, the plugging mechanism is disassembled, and an operator enters the upper part of the main disc body through the passing channel to clean sediment.
By adopting the technical scheme, the method has the following beneficial effects:
according to the distribution plate provided by the invention, the structure is improved, the through passage and the plugging mechanism detachably connected with the through passage are arranged, so that on the premise of not affecting the normal function of the distribution plate, when maintenance and overhaul are carried out, operators can observe the accumulation condition of sediment in the ebullated bed reactor in advance by passing an endoscope through the inspection tube, the operators are prevented from being buried by the sediment when opening the plugging mechanism, and the internal gas environment of the ebullated bed reactor can be detected and analyzed by the inspection tube, so that the operators can be ensured to enter the ebullated bed reactor under the safety condition. After meeting the safety conditions, the plugging mechanism is opened, operators can enter from the passing channel to carry out overhauling and maintenance, and the operators do not need to enter from the upper end of the ebullated bed reactor, so that the safety of the operators is greatly improved.
Drawings
The present disclosure will become more readily understood with reference to the accompanying drawings. It is to be understood that these drawings are solely for purposes of illustration and are not intended as a definition of the limits of the invention. In the figure:
FIG. 1 is a perspective view of a dispensing tray according to one embodiment of the present invention;
FIG. 2 is a bottom perspective view of a dispensing tray according to one embodiment of the present invention;
FIG. 3 is a perspective view of a main disc according to an embodiment of the present invention;
FIG. 4 is a perspective view of a closure assembly according to one embodiment of the present invention;
FIG. 5 is a bottom perspective view of a closure assembly according to one embodiment of the present invention;
FIG. 6 is a perspective view of a sealing shell ring according to an embodiment of the present invention;
FIG. 7 is a bottom perspective view of a plugging shell ring according to one embodiment of the present invention;
FIG. 8 is a perspective view of a lower cover according to an embodiment of the present invention;
fig. 9 is a flowchart illustrating a method of repairing and maintaining according to an embodiment of the present invention.
Reference numerals in the drawings:
1. A main tray body; 11, a through passage, 12, a first mounting hole, 13, a drain pipe opening, 14, a second mounting hole;
2. The device comprises a plugging mechanism, a viewing tube, a port flange, a sealing cover, a plugging shell ring, a third mounting hole, a shell ring connecting hole and a shell ring connecting hole, wherein the plugging mechanism comprises a sealing mechanism, a viewing tube, a port flange, a shell ring and a shell ring connecting hole;
3. an upper cover;
4. A lower cover;
5. a blister assembly.
Detailed Description
Specific embodiments of the present invention will be further described below with reference to the accompanying drawings. Wherein like parts are designated by like reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "inner" and "outer" refer to directions toward or away from, respectively, the geometric center of a particular component.
In the present invention, unless explicitly specified and limited otherwise, the term "fixed" and the like are to be construed broadly, and for example, "fixed" may be fixedly connected, detachably connected or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediary, and may be in communication with each other between two elements or in an interaction relationship between two elements unless explicitly specified otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Because the dangerous problem exists when operators overhaul and maintain the ebullated bed reactor in the prior art, the invention aims to develop a fluidized bed reactor which does not influence the distribution of materials on the premise that operators can overhaul the ebullated bed reactor from the upper part of the distribution plate through the distribution plate 11 arranged in the ebullated bed reactor, thereby fundamentally improving the safety of the ebullated bed reactor of devices such as coal-to-liquid chemical industry, petrochemical industry and the like when overhauling, improving the overhauling efficiency, reducing the overhauling cost of enterprises on the ebullated bed reactor, further improving the overall competitive power of key equipment of the coal-to-liquid chemical industry and the petrochemical industry and promoting the high quality development of core equipment of the industry.
On the other hand, the distribution plate provided by the invention can also solve the problems of long replacement and cooling time of internal gas, high safety risk of first entering of operators, complex operation procedure, high maintenance time and high cost in the process of overhauling and maintaining the fluidized bed reactor of the coal-to-liquid chemical industry, petrochemical industry and other devices. The through passage 11 can be used as a gas inlet and outlet passage except for providing a passage for operators to pass through and enter the upper part of the distribution plate so as to assist in realizing operations such as internal gas replacement, cooling and the like, so that the problems that the internal gas and the internal environment of the ebullated bed reactor cannot be rapidly analyzed from the bottom during the maintenance of the ebullated bed reactor can be solved, and the operators, tools and cleaned sediment can enter and exit from the bottom of the ebullated bed reactor through the through passage 11, thereby solving the problems that the prior art cannot solve the problems that the rapid replacement and cooling of the inside of the reactor cannot be completed after the distribution plate is blocked and the sediment accumulation and blocking condition on the upper part of the distribution plate cannot be inspected, and achieving the purposes of safely and efficiently maintaining the inside of the ebullated bed reactor.
As shown in fig. 1 and 2, the distribution tray provided in an embodiment of the present invention includes a main tray body 1 having a plurality of distribution holes and a plugging mechanism 2 detachably connected to the main tray body 1, wherein a through passage 11 for assisting in maintenance is provided on the main tray body 1, the through passage 11 penetrates through the main tray body 1, and the plugging mechanism 2 is detachably embedded in the through passage 11. The plugging mechanism 2 comprises at least one exploring tube 21 with a hollowed-out middle part, and the exploring tube 21 is used for assisting an endoscope in observing the sediment accumulation condition above the main tray body 1.
The main tray body 1 is a main body of the distribution tray, the main tray body 1 is in a circular tray body structure, the periphery of the main tray body 1 is fixedly connected with the inner wall of the ebullated bed reactor, so that a closed reaction area is formed above the main tray body 1, and a plurality of regularly arranged bubble cap assemblies 5 on the distribution tray can realize uniform gas-liquid distribution. The bubble cap assembly 5 is an important structure inside the ebullated bed reactor, and by connecting the bubble cap assemblies 5 uniformly arranged on the distribution tray, it is possible to effectively uniformly distribute the gas and the liquid into the catalyst bed in the ebullated bed reactor.
The bubble cap assembly 5 allows for thorough mixing and even distribution of the gas and liquid as it enters the reactor by its unique structure, such as the openings in the bubble cap and the design of the bubble cap. This helps to avoid too high or too low a gas-liquid concentration in the local area, thereby improving the reaction efficiency. The reasonable bubble cap design can reduce the pressure drop of the fluid when the fluid passes through the distributor, reduce the energy consumption and improve the overall performance of the reactor. The bubble cap assembly 5 also effectively prevents catalyst from depositing on the distributor, maintains the activity of the catalyst, and prolongs the service life of the catalyst. The design of the bubble cap assembly 5 helps to enhance the mixing effect between the gas, liquid and solid phases, and the reaction is more complete and uniform.
The bubble cap is normally provided with a certain number of holes, and the sizes and the distribution modes of the holes are designed according to the specific requirements of the reactor. The material of the bubble cap is usually a corrosion-resistant and high-temperature-resistant material, such as stainless steel. The bubble cap is a component mounted on the bubble cap for further dispersion of gas and liquid. The bubble cap design also takes into account the flow characteristics of the fluid and the operating conditions of the reactor. A distribution tray is located below the blister assembly 5 for evenly distributing fluid over the individual blisters. The distribution plate is also typically perforated or slotted to allow smooth passage of fluid.
In ebullated bed reactors, the bubble cap assembly 5 is typically mounted at the bottom or middle of the reactor, with gas and liquid introduced into the reactor through a fluid pre-distributor and distribution tray. For example, in heavy residuum hydrogenation systems, ebullated bed reactors utilize the bubble cap assembly 5 to uniformly distribute hydrogen and hydrocarbon feedstock into the catalyst bed to achieve efficient hydrogenation reactions.
As shown in fig. 3, a through hole is formed in the center of the main disk body 1 to form a through passage 11, and for convenience of processing and blocking, a circular through hole is preferable as the through passage 11, and the diameter of the opening of the through passage 11 is required to satisfy the operator's through requirement, so that it is at least larger than the shoulder width of most adults, and the preferable value of the diameter of the through passage 11 is 500mm or more. As shown in fig. 1, when the distribution tray normally operates, the plugging mechanism 2 completely plugs the through passage 11 to ensure the tightness of the distribution tray, in order to further improve the tightness, a plurality of sealing groove structures may be provided at the connection position of the plugging mechanism 2 and the main tray body 1, and the plugging reliability of the plugging mechanism 2 is improved by providing a sealing ring or a sealing filler in the sealing groove, and at the same time, the convenience of installation and disassembly of the plugging mechanism 2 is not affected. The blocking mechanism 2 is also provided with a bubble cap component 5, and the distribution position of the bubble cap component 5 on the blocking mechanism 2 is consistent with the distribution interval of the bubble cap component 5 on the main tray body 1, so that the material distribution uniformity of the distribution tray is prevented from being influenced by the blocking mechanism 2.
The lower end of the exploring tube 21 and the lower end of the plugging mechanism 2 are positioned on the same horizontal plane, the upper end of the exploring tube 21 protrudes upwards above the plugging mechanism 2, and the exploring tube 21 is fixedly connected with the plugging mechanism 2 or integrally formed. Before an operator enters the bottom of the ebullated bed reactor for the first time in the shutdown maintenance process, the sediment accumulation condition of the upper surface of the distribution plate can be checked through the exploring pipe 21, forced ventilation can be performed through the exploring pipe 21, and the internal gas of the ebullated bed reactor can be replaced and rapidly cooled through the exploring pipe 21 on the premise of not opening the plugging mechanism 2, so that the internal environment which the operator enters is rapidly and safely obtained. The internal gas in the reaction region above the distribution plate can be acquired and analyzed by the inspection tube 21 to confirm whether the conditions for safe entry of the operator are present. When the passing channel 11 is plugged and assembled back through the plugging mechanism 2, the plugging mechanism 2 can be integrally hoisted through the probing hole by penetrating the probing hole through the sling or the steel wire rope from the top of the reactor, so that the assembly and disassembly accuracy and safety of the plugging mechanism 2 are improved, the overhaul efficiency is further improved, and the overhaul safety and reliability are guaranteed.
In summary, the structure of the distribution plate provided by the embodiment of the invention is improved, and by arranging the through passage 11 and the plugging mechanism 2 detachably connected with the through passage 11, a convenient and safe maintenance environment is provided for operators on the premise of not affecting the normal function of the distribution plate.
When maintenance and overhaul are carried out, operators can observe the accumulation condition of sediment in the ebullated bed reactor in advance by passing an endoscope through the exploring tube 21, so that the operators are prevented from being buried by the sediment when the plugging mechanism 2 is opened, and the internal gas environment of the ebullated bed reactor can be detected and analyzed by the exploring tube 21, so that the operators can be ensured to enter the ebullated bed reactor under the safe condition.
In addition, after meeting the safety condition, the plugging mechanism 2 is opened, and operators can enter from the passing channel 11 to carry out overhauling and maintenance, so that the operators do not need to enter from the upper end of the ebullated bed reactor, and the safety of the operators is greatly improved.
In one embodiment, as shown in fig. 3, the through passage 11 is located at the center of the main tray 1, and a plurality of first mounting holes 12 for mounting the blister assembly 5 and at least one drain opening 13 for connecting a drain are formed in the main tray 1.
In this embodiment, first mounting holes 12 penetrating through the main tray body 1 are uniformly distributed on the main tray body 1, a bubble cap assembly 5 is mounted in each first mounting hole 12, and the first mounting holes can be connected with a drain pipe by arranging a drain pipe opening 13, so that sediment on the upper surface of the main tray body 1 is primarily cleaned through the drain pipe. Further, the periphery of the main tray body 1 is annularly provided with a plurality of second mounting holes 14 which are used for being fixedly connected with the ebullated bed reactor, and the second mounting holes 14 can be threaded holes, so that the periphery of the main tray body 1 and the ebullated bed reactor are uniformly connected by uniformly distributed bolts.
In one embodiment, as shown in fig. 4 and 6, the sight tube 21 is a straight tube or a curved tube penetrating the plugging mechanism 2 and having an upper end protruding upward, and the sight tube 21 is also used for achieving gas replacement and gas cooling.
In this embodiment, the exploring tube 21 is communicated with the upper area and the lower area of the main tray body 1, and the exploring tube 21 hollowed out in the middle can replace and rapidly cool the internal gas of the ebullated bed reactor, so that the internal environment for meeting the entering of operators is achieved rapidly and safely.
In one embodiment, as shown in fig. 5 and 7, the lower end of the exploring tube 21 is provided with a port flange 211, and the plugging mechanism 2 further comprises a sealing cover 22 which is connected with the port flange 211 and completely plugs the opening of the lower end of the exploring tube 21, and the inside of the exploring tube 21 is filled with filling materials.
In this embodiment, the cover 22 is detachably connected with the end cover flange through a plurality of bolts, so as to ensure the tightness of the distribution plate during normal operation, and the filling material is filled in the exploring tube 21, so as to prevent the tightness of the reaction area above the distribution plate from being affected when a gap appears at the joint of the cover 22 and the end cover flange, and when the exploring tube 21 needs to be communicated, the cover 22 positioned at the lower end of the exploring tube 21 is only required to be opened, and the filling material can flow downwards under the action of gravity, so that the inside of the exploring tube 21 is conducted.
The closure 22 may be provided at the upper end opening of the sight tube 21 as required, by operating at the lower end of the blocking mechanism 2 to open the closure 22 at the upper end of the sight tube 21. As shown in fig. 7, a stepped seal groove may be provided on the lower surface of the sealing ring 23, and a seal ring may be placed in the seal groove to improve the sealing property between the sealing ring 23 and the lower cap 4.
In one embodiment, as shown in fig. 4, the plugging mechanism 2 includes a plugging tube section 23 and a bubble cap assembly 5 disposed on the upper surface of the plugging tube section 23, and the lower end of the inspection tube 21 is fixedly connected with the middle of the upper surface of the plugging tube section 23.
In this embodiment, a plurality of third mounting holes 231 for mounting the blister component 5 are formed through the plugging shell ring 23, the plugging shell ring 23 is a cylindrical structure with an opening at the lower end, a plurality of shell ring connecting holes 232 which are uniformly distributed are formed through the side wall of the plugging shell ring 23, and the shell ring connecting holes 232 are connected with the lower cover 4 through bolts so as to realize detachable connection of the plugging shell ring 23 and the lower cover 4, or are connected into the shell ring connecting holes 232 through bolts so as to realize detachable connection with the lower surface of the main disc body 1.
In one embodiment, as shown in fig. 1 and 2, the plugging mechanism 2 further includes an upper cover 3 connected to the upper surface of the plugging section 23 and a lower cover 4 connected to the lower surface of the plugging section 23, and the upper cover 3 and the lower cover 4 are further connected to the upper surface and the lower surface of the main tray body 1, respectively, to restrict the plugging section 23 in the through passage 11.
Further, as shown in fig. 4 and 5, the upper cover 3 is connected to the upper surface of the plugging cylinder section 23 by an upper fastener, the outer periphery of the upper cover 3 is engaged with the upper end opening of the passage 11, and the lower cover 4 is connected to the lower surface of the main disc body 1 by a lower fastener.
In this embodiment, the upper cover 3 and the lower cover 4 are provided to fasten the position of the plugging mechanism 2 in the case where the plugging mechanism 2 is detachably plugged with the through passage 11, so as to further ensure the plugging reliability of the plugging mechanism 2. The upper fastening piece and the lower fastening piece are all bolts, the connecting holes of the upper cover 3 and the lower cover 4 are all threaded holes, and the upper fastening piece and the lower fastening piece are connected through bolts, so that the fastening effect is reliable and the installation and the disassembly are facilitated.
As shown in fig. 8, a flange and a sealing groove can be arranged on the periphery of the upper surface of the lower cover 4 as required, and connecting holes uniformly distributed in the circumferential direction are arranged on the flange on the periphery, so that the lower cover 4 is detachably connected with the lower surface of the main disc body 1 through bolts. Packing sealing is realized between the periphery of the lower cover 4 and the lower surface of the main disc body 1, the packing sealing is a form of mechanical sealing, a combined sealing mode of metal packing and soft packing is adopted, and the packing sealing structure is wound on the outer structure of the pump, and repeated actions are performed for multiple times to achieve the sealing effect. After packing is filled in the packing cavity, the packing is axially compressed by a gland. When there is relative movement between the shaft and the packing, radial forces are generated and in close contact with the shaft due to the plasticity of the packing. At the same time, the impregnated lubricant in the packing is squeezed out, forming an oil film between the contact surfaces. The contact state is not completely uniform, the contact part forms a bearing effect, and the non-contact concave part forms a small oil groove, so that a thicker oil film is formed. The contact portion and the non-contact portion form an irregular labyrinth, which plays a role in preventing liquid flow from leaking, namely, a labyrinth effect is formed. The packing material is selected to be important for the sealing effect and the service life, and the packing material adopted in the embodiment can be graphite, carbon fiber, metal reinforced graphite, polytetrafluoroethylene and the like. The materials have the characteristics of physical and chemical stability, self-lubricity, thermal conductivity, corrosion resistance and the like, and are suitable for the environment where the distribution plate is located.
In one of the embodiments, the main disc body 1 is provided with a fixing flange for connection with the lower cover 4 at the lower end opening of the through passage 11.
In this embodiment, the fixing flange is fixedly connected with the main disc body 1 through welding, and the strength of the central passing channel 11 of the main disc body 1 can be prevented from being influenced by too many holes through arranging the fixing flange.
An embodiment of the present invention provides an ebullated bed reactor, comprising a reactor body, wherein any of the aforementioned distribution trays is disposed within the reactor body. The ebullated bed reactor can achieve the effect of safely and efficiently overhauling and maintaining the inside of the ebullated bed reactor by adopting any of the aforementioned obtaining through passages 11 through which an operator passes.
As shown in fig. 9, an embodiment of the present invention provides a method for overhauling and maintaining any one of the foregoing distribution trays, including:
Step S901, the endoscope is passed through the sight tube 21 from the upward direction to observe the deposition height above the main tray body 1.
If the deposit accumulation height does not exceed the safety height threshold, the internal gas of the ebullated bed reactor is acquired through the sight tube 21, step S902.
And step S903, analyzing the internal gas to obtain a gas analysis result.
And step S904, if the gas analysis result is qualified, the plugging mechanism 2 is disassembled, and an operator enters the upper part of the main tray body 1 through the passage 11 to clean sediment.
When the distribution plate is firstly installed in the ebullated bed reactor, the upper cover 3 is fastened and connected with the main plate body 1 through the fastening piece on the plugging mechanism 2, then the fastening piece of the plugging mechanism 2 is penetrated into the bolt hole of the upper cover 3, the fixing flange is welded on the lower surface of the main plate body 1, the bubble cap assembly 5 and the plugging shell ring 23 are assembled outside the ebullated bed reactor, high-temperature cement is poured into the gap between the interior of the plugging shell ring 23 and the bubble cap assembly 5 and the lower cover 4 is installed, the assembled plugging mechanism 2 is dumped into the interior of the lower end of the ebullated bed reactor, then the upper end of the ebullated bed reactor is fixed after the steel wire rope passes through the passage 11 and passes through the exploring tube 21, the plugging mechanism 2 is lifted up through the steel wire rope by utilizing a guide chain or other lifting equipment and penetrates into the passage 11, then the fixing flange is welded, the lower fastening piece is installed, the steel wire rope is removed after the lower cover 4 is fastened and connected with the fixing flange, and finally the sealing cover 22 is installed at the lower end of the exploring tube 21 after filling material is filled into the exploring tube 21.
When the shutdown overhauling is carried out, the upper end and the lower end of the ebullated bed reactor are respectively opened, an operator enters after the space at the lower end of the ebullated bed reactor is qualified through analysis, then the sealing cover 22 at the lower end of the exploring tube 21 is disassembled, the filling material in the exploring tube 21 is cleaned through machinery or waterpower, the endoscope is used for checking the accumulation condition of sediment on the upper surface of the main disc body 1 from bottom to top through the exploring tube 21, if the accumulation height of the sediment is not more than two thirds of the height of the exploring tube 21, a steel wire rope is fed in from the upper end of the ebullated bed reactor, and is fixedly connected after passing through the traversing channel 11 and passing through the exploring tube 21 and the lower cover 4, the lower fastening piece and the fastening piece of the plugging mechanism 2 are disassembled, and the plugging mechanism 2 is slowly put down.
On the other hand, if the sediment accumulation height exceeds two thirds of the height of the sight tube 21, at this time, if the plugging mechanism 2 is detached from the distribution tray by being lowered, there is a risk that a large amount of sediment at the moment when the plugging mechanism 2 is detached is flushed down the worker through the passage 11. Therefore, the operator needs to enter from the upper end of the ebullated bed reactor to clean the sediment before removing the plugging mechanism 2. The method comprises the specific operation steps of carrying out gas analysis on the inner space of the ebullated bed reactor above the distribution plate by using a gas analysis conduit through the exploring tube 21, if the analysis is unqualified, carrying out gas replacement and cooling on the inner space of the ebullated bed reactor from the lower side of the distribution plate through the exploring tube 21 until the inner space of the ebullated bed reactor above the distribution plate meets the condition that operators enter the maintenance, and cleaning sediment above the distribution plate from the upper end of the ebullated bed reactor, and repeating the steps after cleaning, so as to detach the plugging mechanism 2.
The above technical schemes can be combined according to the need to achieve the best technical effect.
The foregoing is only illustrative of the principles and preferred embodiments of the present invention. It should be noted that several other variants are possible to those skilled in the art on the basis of the principle of the invention and should also be considered as the scope of protection of the present invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510056428.6A CN119656996A (en) | 2025-01-14 | 2025-01-14 | Distribution plate, fluidized bed reactor and overhaul and maintenance method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510056428.6A CN119656996A (en) | 2025-01-14 | 2025-01-14 | Distribution plate, fluidized bed reactor and overhaul and maintenance method |
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| CN119656996A true CN119656996A (en) | 2025-03-21 |
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| CN202510056428.6A Pending CN119656996A (en) | 2025-01-14 | 2025-01-14 | Distribution plate, fluidized bed reactor and overhaul and maintenance method |
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| Country | Link |
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2025
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