Gas-liquid distributor of fluidized bed reactor
By designing the fallback frame and limiting components of the check valve assembly, the problems of gas-liquid distributor blockage and catalyst coking caused by the viscosity of purified coal tar were solved, and the stable operation of the fluidized bed reactor was achieved.
Patent Information
- Application Number
- CN202520490218.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-19
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-03-19
AI Technical Summary
In the prior art, the high viscosity of purified coal tar causes the check valve of the gas-liquid distributor to become clogged, resulting in blockage of the bottom distribution plate of the fluidized bed reactor, poor catalyst boiling state, and coking.
A gas-liquid distributor for a fluidized bed reactor was designed, including a gas-liquid pipe connector, a liquid inlet pipe, a gas inlet pipe, and a check valve assembly. The check valve assembly consists of a drop frame and a limiting component. The drop frame moves under the push of gas to prevent the catalyst from entering the liquid inlet pipe, thereby realizing the switching between the operation and shutdown states of the gas-liquid distributor and preventing blockage and coking.
This effectively prevents the catalyst from falling into the liquid inlet pipe when the gas-liquid distributor stops operating, avoiding blockage and coking problems caused by poor catalyst boiling, and ensuring the normal operation of the fluidized bed reactor.
Smart Images
Figure CN223901803U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of boiling bed reactor, in particular to a boiling bed reactor gas-liquid distributor. BACKGROUND
[0002] The boiling bed reactor is used for gas-solid reaction process, in which fluid (raw oil and hydrogen) flows into the reactor from the lower part at a certain flow rate. When the raw gas passes through the catalyst bed of the reactor, the catalyst particles are suspended and rolled in a boiling state under the action of the gas flow, and the raw gas is chemically reacted on the surface of the fluidized catalyst. The boiling bed reactor is the core equipment of the boiling bed coal tar hydrogenation upgrading device, and the gas-liquid distributor is installed on the bottom distribution plate of the boiling bed reactor. The gas-liquid distributor uniformly distributes the gas-liquid, and prevents the catalyst from falling into the bottom of the distribution plate.
[0003] The raw material of the gas-liquid distributor is purified coal tar and hydrogen, and the purified coal tar is relatively viscous, which can paste the check ball valve installed in the gas-liquid distributor, so that the gas-liquid distributor on the bottom distribution plate of the boiling bed reactor is blocked, resulting in poor boiling state of the catalyst and coking problem. CONTENT OF THE INVENTION
[0004] The embodiment of the present application provides a boiling bed reactor gas-liquid distributor, which solves the problem that the check ball valve installed in the gas-liquid distributor is pasted due to the relatively viscous purified coal tar in the prior art, so that the gas-liquid distributor on the bottom distribution plate of the boiling bed reactor is blocked, resulting in poor boiling state of the catalyst and coking problem. The technical effect of preventing the catalyst from falling into the inside of the liquid inlet pipe when the gas-liquid distributor stops running is achieved, and the technical effects of preventing the gas-liquid distributor from being blocked and preventing the catalyst from being coked in poor boiling state are also achieved.
[0005] The embodiment of the present application provides a boiling bed reactor gas-liquid distributor, which solves the problem that the check ball valve installed in the gas-liquid distributor is pasted due to the relatively viscous purified coal tar in the prior art, so that the gas-liquid distributor on the bottom distribution plate of the boiling bed reactor is blocked, resulting in poor boiling state of the catalyst and coking problem. The technical effect of preventing the catalyst from falling into the inside of the liquid inlet pipe when the gas-liquid distributor stops running is achieved, and the technical effects of preventing the gas-liquid distributor from being blocked and preventing the catalyst from being coked in poor boiling state are also achieved.
[0006] In a possible implementation, the back-falling frame is provided with a discharging channel on the side thereof in a radial direction.
[0007] In a possible implementation, the back-falling frame and the limiting piece are provided with a gap in a radial direction.
[0008] In a possible implementation, the back-checking assembly further comprises a discharging pipe, one end of the discharging pipe being connected to the side of the back-falling frame and being in communication with the discharging channel.
[0009] In a possible implementation, the limiting piece is provided with a limiting slot.
[0010] In a possible implementation, the back-falling frame is provided with a limiting boss, the limiting boss being matched with the limiting slot, and the limiting boss being connected to the inner wall of the back-falling frame.
[0011] The one or more technical solutions provided in the application have at least the following technical effects:
[0012] The utility model discloses a boiling bed reactor gas liquid distributor, including gas liquid pipe connecting piece, liquid inlet pipe, gas inlet pipe and back-checking assembly, the back-checking assembly includes back-falling frame and limiting piece, the inside of back-falling frame is provided with chamber, back-falling frame is set up in the outside of liquid inlet pipe, this liquid inlet pipe is used to pass in purified coal tar, hydrogen is passed in from gas liquid pipe connecting piece end and is gathered in gas inlet pipe and is passed in liquid inlet pipe and mixes with purified coal tar, and purified coal tar and hydrogen can enter back-falling frame simultaneously and export through discharging channel, wherein, limiting piece is connected in the one end of liquid inlet pipe close to back-falling frame, back-falling frame is set up in the outside of liquid inlet pipe, and limiting piece slides in the inside of chamber, back-falling frame moves under the impetus of gas and moves away from limiting piece, and gas liquid distributor is in running state, back-falling frame moves under the action of gravity and moves close to limiting piece, and gas liquid distributor is in the state of suspension, thereby can prevent catalyst from entering and falling into liquid inlet pipe from discharging channel. The application solves the problem that the back-checking ball valve in the gas liquid distributor is covered in the prior art due to the fact that the purified coal tar is relatively thick, thereby causing the gas liquid distributor on the bottom distribution plate of the boiling bed reactor to be blocked, resulting in poor boiling state of the catalyst and coking, realizes the technical effect of preventing the catalyst from falling into the inside of the liquid inlet pipe when the gas liquid distributor stops running, and also has the technical effects of preventing the gas liquid distributor from being blocked and preventing the catalyst from having poor boiling state and coking. BRIEF DESCRIPTION OF DRAWINGS
[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application or the prior art. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.
[0014] Figure 1 A sectional view of a gas-liquid distributor of a boiling bed reactor provided by the embodiment of the present application;
[0015] Figure 2 A schematic diagram of the check assembly in the running state provided by the embodiment of the present application;
[0016] Figure 3 A schematic diagram of the check assembly in the suspended state provided by the embodiment of the present application;
[0017] Figure 4 A schematic diagram of the housing provided by the embodiment of the present application;
[0018] Figure 5 A schematic diagram of the limiting piece provided by the embodiment of the present application;
[0019] Figure 6 A schematic diagram of the limiting plate provided by the embodiment of the present application.
[0020] Icon: 1-gas-liquid pipe connecting piece; 2-liquid inlet pipe; 3-gas inlet pipe; 4-check assembly; 41-falling back frame; 411-housing; 412-limiting plate; 413-limiting boss; 42-limiting piece; 421-limiting groove; 43-discharge pipe; 5-feeding pipe. DETAILED DESCRIPTION
[0021] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0022] In the description of the embodiments of the utility model, it needs to be explained that, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the embodiments of the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model. The terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. In addition, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the embodiments of the utility model can be understood according to the specific circumstances.
[0023] The utility model embodiment provides a kind of boiling bed reactor gas-liquid distributor, as shown in Figures 1-6 Limiting piece 42 is connected to the one end of liquid inlet pipe 2 close to backfall frame 41;Backfall frame 41 is sleeved on the outside of limiting piece 42, and limiting piece 42 slides in the inside of chamber;Backfall frame 41 moves to the direction away from limiting piece 42 under the impetus of gas, and gas-liquid distributor is in running state;Backfall frame 41 moves to the direction close to limiting piece 42 under the action of gravity, and gas-liquid distributor is in suspended state.
[0024] Exemplarily, it further includes feed pipe 5, and feed pipe 5 is connected between liquid inlet pipe 2 and limiting piece 42;Gas inlet pipe 3 is sleeved on the outside of feed pipe 5 and is connected.Feed pipe 5 can increase the flow rate of gas, so that gas-liquid mixing is more uniform.
[0025] Exemplarily, backfall frame 41 includes shell 411 and limiting plate 412, and limiting plate 412 is threadedly connected to the inside of shell 411, in the installation process, shell 411 is first sleeved on the outside of limiting piece 42, and then limiting plate 412 is fixedly connected in shell 411. Among them, slot is opened on limiting plate 412, which is used for avoiding feed pipe 5 in the installation process. Rotating column is installed on limiting plate 412, which is used for assisting the connection of limiting plate 412 on shell 411.
[0026] Exemplarily, the back-off frame 41 comprises a cover plate and a base, the cover plate is threadedly connected to the base, in the installation process, the base is sleeved on the outside of the limiting piece 42, then the feed pipe 5 is connected, and finally the cover plate is fixedly connected with the base.
[0027] In the embodiment of the present application, as shown in the figure, Figures 1-6 The back-off frame 41 is provided with a discharging channel on the side in the radial direction.
[0028] In the embodiment of the present application, as shown in the figure, Figures 1-6 The back-off frame 41 and the limiting piece 42 have a gap in the radial direction.
[0029] Exemplarily, when the gas-liquid distributor is in the running state, since the back-off frame 41 moves away from the limiting piece 42, the catalyst can fall from the gap under the extrusion of the back-off frame 41 and the limiting piece 42, preventing the catalyst coking block at this position from continuing to enlarge when the gas-liquid distributor stops working.
[0030] In the embodiment of the present application, as shown in the figure, Figures 1-6 The back-off frame 41 is provided with a discharging channel on the side in the radial direction.
[0031] In the embodiment of the present application, as shown in the figure, Figures 1-6 The limiting piece 42 is provided with a limiting groove 421.
[0032] In the embodiment of the present application, as shown in the figure, Figures 1-6 The back-off frame 41 is provided with a limiting convex 413; the limiting convex 413 cooperates with the limiting groove 421.
[0033] The limiting convex 413 is connected to the inner wall of the back-off frame 41.
[0034] Exemplarily, the limiting convex 413 and the discharging channel are distributed staggeredly.
[0035] Exemplarily, through the limiting convex 413 and the limiting groove 421, the rotation of the back-off frame 41 around the limiting piece 42 caused by uneven feeding and other problems can be prevented, so that the discharging distribution is more uniform.
[0036] The various embodiments in the specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other, and each embodiment mainly describes the difference from other embodiments.
[0037] The above examples are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can still be modified, or some or all of the technical features thereof can be replaced by equivalents; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the present application.
Claims
1. An ebullated bed reactor gas-liquid distributor, characterized in that, The utility model relates to a gas-liquid distributor, which comprises a gas-liquid pipe connecting piece (1), a liquid inlet pipe (2), a gas inlet pipe (3) and a check assembly (4). The check assembly (4) comprises a back-falling frame (41) and a limiting piece (42). The back-falling frame (41) is internally provided with a chamber. The gas-liquid pipe connecting piece (1) is sleeved on the outside of the liquid inlet pipe (2). The gas inlet pipe (3) is sleeved on the outside of the liquid inlet pipe (2), and one end of the gas inlet pipe (3) is connected with the liquid inlet pipe (2), and the other end is connected with the gas-liquid pipe connecting piece (1). The limiting piece (42) is connected to one end of the liquid inlet pipe (2) close to the back-falling frame (41). The back-falling frame (41) is sleeved on the outside of the limiting piece (42), and the limiting piece (42) slides in the chamber. The back-falling frame (41) moves away from the limiting piece (42) under the push of gas, and the gas-liquid distributor is in a running state; the back-falling frame (41) moves close to the limiting piece (42) under the action of gravity, and the gas-liquid distributor is in a suspended state.
2. The ebullated bed reactor gas-liquid distributor according to claim 1, characterized in that The back-falling frame (41) is provided with a discharging channel on the side in the radial direction.
3. The ebullated bed reactor gas-liquid distributor of claim 1, wherein, The back-falling frame (41) and the limiting piece (42) have a gap in the radial direction.
4. The ebullated bed reactor gas-liquid distributor of claim 2, wherein, The check assembly (4) further comprises a discharging pipe (43). One end of the discharging pipe (43) is connected to the side of the back-falling frame (41) and communicates with the discharging channel.
5. The ebullated bed reactor gas-liquid distributor of claim 1, wherein, The limiting piece (42) is provided with a limiting groove (421).
6. The ebullated bed reactor gas-liquid distributor of claim 5, wherein, The back-falling frame (41) is provided with a limiting boss (413). The limiting boss (413) cooperates with the limiting groove (421). The limiting boss (413) is connected to the inner wall of the back-falling frame (41).