CN218046880U - Axial-radial combined accumulated dirt filtering equipment - Google Patents

Abstract

The utility model discloses an axial radial combination scaling filtration equipment, including the reactor upper cover, the upper end surface of reactor upper cover is provided with the entry diffuser, the lower extreme of entry diffuser is provided with upper axial filter layer, the lower extreme surface of upper axial filter layer is provided with the radial filter layer of lower floor, the lower extreme of the radial filter layer of lower floor is provided with the plate of distributor. A radial combination scaling filtration equipment of axle, according to axial filtration and radial filterable fundamental principle and hydrodynamics characteristic, increase scaling equipment hold dirt, scaling ability, adopt axial filter dish and radial filter dish integrated configuration, combine the gas-liquid flow characteristic, the multistage level of rational arrangement axle radial structure parameter, protective agent is joined in marriage etc. can realize the hierarchical filtration of material under the condition of less pressure drop, increase simultaneously and hold dirt scaling ability, bring better use prospect.

Description

A combination of axial and radial fouling filter equipment

technical field

The utility model relates to the technical field of reactor internal component equipment in the petrochemical industry, in particular to an axial-radial combined fouling filter equipment.

Background technique

In recent years, with the increasingly stringent environmental protection requirements, the heavy and inferior quality of crude oil has become more and more serious, and the quality requirements for distillate oil in the market have become higher and higher. Therefore, oil hydrogenation technology is an important step in the production process of clean fuel Indispensable primary technology.

The raw materials in the field of hydrogenation have a small amount of impurities, coke, and rust generated by impacting pipelines and equipment when flowing through the system. The above-mentioned scales will accumulate in the reactor, reducing the flow channel of the material, and even blocking the channel and The pores of the catalyst greatly reduce the pore solubility of the catalyst, and the catalyst activity decreases rapidly. At the same time, the pressure drop of the reactor rises rapidly, and in severe cases, the tray will be crushed, affecting the long-term stable operation of the production device and increasing the operating cost.

In order to solve the above problems, the earliest method is to set a number of fouling devices in the reactor to intercept, filter and deposit the fouling in the liquid phase material. There are two types of fouling devices that are commonly used, namely, the bottom-mounted fouling device and the upper-mounted fouling device (it depends on the relative position of the top distribution plate, the top-mounted fouling device is above the top distribution plate, and vice versa. bottom type). As far as the current application on industrial devices is concerned, the lower-mounted fouling device is less used, and the upper-mounted fouling device is used more.

Domestically, a lot of work has been done on the improvement and optimization of top-mounted fouling devices, and a batch of fouling devices have been formed, such as CN201420434290.6, CN201420434739.9, CN200110050800.0, CN200410050765.2, CN200510069872.4, CN200520017581.6, CN0773129 .0, etc. These fouling devices are installed in the reactor head and filled with a certain amount of protective agent (scaling inhibitor), the effect is better, but the problems of this type of cartridge filter, one is that the upper gas passage will cause Most of the liquid is directly sucked and short-circuited. Second, the filter screen will be quickly smeared, and the protective agent is difficult to achieve the predetermined effect of scale inhibition and filtration. The scale simply relies on precipitation, and the effect is not good. It is relatively complicated to renovate the old device by keeping the installation boss, which is limited to the load-bearing capacity of the beam and the boss, and the fouling capacity is also limited; moreover, this kind of fouling device can only be filled with one kind of protective agent (scaling inhibitor), and there is a protective agent The problem of choosing adaptability, if you choose a large particle protective agent, the liquid will pass through the fouling bed directly, if you choose a small particle protective agent, the fouling device bed will be blocked quickly, and the fouling device will be activated in the above two cases If the effect of anti-scaling and filtering is less than the predetermined effect, the effect of the fouling device will be greatly reduced.

At present, the hydrogenation reactor is developing towards large-scale development, and the idle space of the upper head is further increased. If the above-mentioned technology is still used in the case of poor-quality raw materials, it will be difficult to achieve effective fouling capacity, and the long-term operation of the device will be greatly reduced. The utility model is mainly based on the basic principle of axial filtration and radial filtration and the fluid mechanics characteristics to increase the scale capacity and scale accumulation capacity of the fouling equipment. , reasonable layout of axial and radial structural parameters, multi-stage gradation of protective agents, etc., can achieve graded filtration of materials with a small pressure drop, and at the same time increase the scale capacity.

The existing axial-radial combined fouling filter equipment has fouling and fouling when it is used. The fluid flow form of the filtering equipment is single, the capacity of fouling and fouling is insufficient, and the effective running time is insufficient. Especially when it is used in a large reactor, the upper head is effective. The problem of low space utilization rate has brought certain adverse effects on people's use process. Therefore, we propose an axial and radial combined fouling filter equipment.

Utility model content

The main purpose of the utility model is to provide an axial and radial combined fouling filter equipment, which can effectively solve the problems in the background technology.

In order to achieve the above object, the technical scheme that the utility model takes is:

An axial-radial combined fouling filtering device, comprising an upper head of a reactor, an inlet diffuser is arranged on the outer surface of the upper end of the upper end of the reactor, and an upper axial filter layer is arranged at the lower end of the inlet diffuser, The outer surface of the lower end of the upper axial filter layer is provided with a lower radial filter layer, and the lower end of the lower radial filter layer is provided with a distribution plate.

Preferably, the upper axial filter layer can be in the shape of a circle, a square, a hexagon, etc., and the upper axial filter layer can be cut into several edge filter grooves and several internal strip filter grooves, and the edge The filter tank is composed of outer panel, inner side panel, bottom support grid and upper cover net. The edge filter tank and the inner strip filter tank are connected to form the upper axial filter layer, which is placed on the lower radial filter layer as a whole. , the height of the inner side panel is 100-300mm, and the height of the outer side panel is 50-300mm higher than the inner side panel.

Preferably, 30-100 V-shaped notches or U-shaped notches are evenly distributed on the upper part of the outer panel, and a gap of 200-500mm is maintained between the outer panel and the inner wall of the upper head of the reactor, and the bottom support grid can be made of Johnson mesh Or wire mesh, where the gap is generally 1-5mm according to the particle size of the protective agent. The upper cover mesh can be made of 1-2 layers of silk mesh. When the protective agent is filled, the upper cover mesh is welded to the edge filter tank connect.

Preferably, the lower radial filter layer is composed of a number of radial filters arranged according to a certain rule and a fouling disc plate, and a plurality of installation holes arranged according to a certain rule are opened on the fouling disc plate, each A radial filter is installed on each mounting hole, and the fouling plate is installed at the bottom of the radial filter, and the radial filter is composed of a bottom plate, an inner mesh cylinder, an outer mesh cylinder, a cover plate, a vertical plate and a support plate Composition, the bottom plate, the inner net cylinder, the outer net cylinder, the vertical plate and the support plate are connected together by welding, and the cover plate is an independent part, which can be radially connected with the welded parts of the radial filter through bolts, clips, etc. , in order to load and unload the protective agent.

Preferably, the structure of the radial filter can be various, including but not limited to cylindrical, square, polygonal or truncated cone, wherein the inner mesh cylinder and the outer mesh cylinder can be made of Johnson mesh or wire mesh, wherein the gap According to the particle size of the protective agent is generally 1-5mm, the diameter of the outer net cylinder is generally 300-500mm, and the diameter of the inner net cylinder is generally 100-300mm.

Preferably, the height of the inner net cylinder and the outer net cylinder is generally 400-700mm, the diameter of the support plate should be greater than the diameter of the outer net cylinder by about 50mm, and the gap between the cover plate and the support plate is 50-150mm, so The above-mentioned radial filter is welded, bolted or clamped to the fouling plate through the bottom plate, so that it is fixed on the fouling plate.

Compared with the prior art, the utility model has the following beneficial effects: the axial and radial combined fouling filter equipment has a simple structure and is convenient for installation and maintenance; two layers of filter beds are provided, which are the upper axial filter layer and the filter bed respectively. The lower radial filter layer realizes axial and radial combined filtration, which can make full use of the space of the reactor head; there is a certain gap between the periphery of the upper axial filter layer and the inside of the reactor, and the opening ratio of the lower radial filter bed is large. Therefore, the pressure drop of this structure is small; the protective agent can be filled in two layers of filter layers in stages, which can effectively intercept dirt of different sizes in layers, and effectively slow down the failure of this structure; the structure is two layers of filter beds. In the case of failure of the bed layer, it will not cause the failure of the whole structure; it can effectively carry out the dynamic sedimentation of the material dirt and simplify the form of the inlet diffuser. The effect is better than the traditional method.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of an axial-radial combined fouling filter device of the present invention.

FIG. 2 is an enlarged view of the upper axial filter layer 20 in FIG. 1 of an axial-radial combined fouling filter device of the present invention.

Fig. 3 is an enlarged view of the lower radial filter layer 30 in Fig. 1 of an axial-radial combined fouling filter device of the present invention.

In the figure: 10, the inlet diffuser; 20, the upper axial filter layer; 30, the lower radial filter layer; 40, the upper head of the reactor; 50, the distribution plate; 21, the bottom support grid; 22, the edge filter tank 23. Internal strip filter tank; 24. Outer panel; 25. Internal side panel; 26. Upper cover; 31. Radial filter; 32. Scale plate; 310. Base plate; 312, outer mesh tube; 313, cover plate; 314, vertical plate; 315, support plate; 320, installation hole.

detailed description

In order to make the technical means, creative features, goals and effects achieved by the utility model easy to understand, the utility model will be further elaborated below in conjunction with specific embodiments.

In the description of the present utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "another end" The orientation or positional relationship indicated by ", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, so as to Specific orientation configurations and operations, therefore, should not be construed as limitations on the invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and should not be understood as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless otherwise specified and limited, the terms "installed", "set with", "connected", etc. should be understood in a broad sense, such as "connected", which can be a fixed The connection can also be a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Embodiment one:

As shown in Figures 1-3, an axial-radial combined fouling filter device includes a reactor upper head 40, an inlet diffuser 10 is arranged on the outer surface of the upper end of the reactor upper head 40, and the lower end of the inlet diffuser 10 The upper axial filter layer 20 is provided, the lower outer surface of the upper axial filter layer 20 is provided with the lower radial filter layer 30 , and the lower end of the lower radial filter layer 30 is provided with a distribution plate 50 .

Embodiment two:

On the basis of Embodiment 1, as shown in Figure 1, the upper axial filter layer 20 can be circular, square, hexagonal and other shapes, and the upper axial filter layer 20 can be cut into several edge filter grooves 22 and Several internal strip filter tanks 23, the edge filter tank 22 is composed of an outer panel 24, an inner side panel 25, a bottom support grid 21 and an upper cover net 26, and the edge filter tank 22 and the internal strip filter tank 23 are formed by a connecting structure The upper axial filter layer 20 is placed on the lower radial filter layer 30 as a whole, the height of the inner side panel 25 is 100-300mm, the height of the outer panel 24 is 50-300mm higher than the inner side panel 25, and the upper part of the outer panel 24 is evenly distributed by 30 - 100 V-shaped notches or U-shaped notches, the outer panel 24 and the inner wall of the upper head 40 of the reactor maintain a gap of 200-500 mm, the bottom support grid 21 can be made of Johnson mesh or silk screen, and the gap depends on the particle size of the protective agent Generally 1-5mm, the upper cover 26 can be made of 1-2 layers of wire mesh. When the protective agent is filled, the upper cover 26 is welded to the edge filter tank 22, and the lower radial filter layer 30 is composed of several radial filters. The filter 31 is arranged according to a certain rule and the fouling plate 32 is formed together. The fouling plate 32 is provided with a plurality of installation holes 320 arranged according to a certain rule, and each mounting hole 320 is equipped with a radial filter 31. , fouling disc plate 32 is installed on the bottom of radial filter 31, and radial filter 31 is made up of base plate 310, inner net tube 311, outer net tube 312, cover plate 313, vertical plate 314 and support plate 315, and base plate 310 , the inner net tube 311, the outer net tube 312, the vertical plate 314 and the support plate 315 are connected together by welding, and the cover plate 313 is an independent part, which can be radially connected with the welding parts of the radial filter 31 through bolts, clips, etc. In order to load and unload the protective agent, the structure of the radial filter 31 can be various, including but not limited to cylindrical, square, polygonal or truncated cone, wherein the inner mesh cylinder 311 and the outer mesh cylinder 312 can be made of Johnson mesh or Screen production, where the gap is generally 1-5mm according to the particle size of the protective agent, the diameter of the outer mesh cylinder 312 is generally 300-500mm, the diameter of the inner mesh cylinder 311 is generally 100-300mm, the height of the inner mesh cylinder 311 and the outer mesh cylinder 312 Generally 400-700mm, the diameter of the support plate 315 should be greater than the diameter of the outer mesh cylinder 312 by about 50mm, the gap between the cover plate 313 and the support plate 315 is 50-150mm, the radial filter 31 is welded with the fouling plate 32 through the bottom plate 310 , Bolt connection or clip connection, so that it is fixed on the fouling disc plate 32, which is conducive to the stability of the overall structure of the fouling filter equipment.

It should be noted that the utility model is an axial and radial combined fouling filter equipment. When in use, the material to be filtered (including liquid phase and gas phase) flows through the inlet diffuser 10 to the upper axial filter layer 20. Under the action of gravity, the liquid phase material is collected above the upper axial filter layer 20 and flows to the lower radial filter layer 30 through the upper cover net 26, protective agent and bottom support grid 21, and the gas phase material passes through the outer panel 24 and the reactor The gap between the inner walls of the upper head 40 flows to the lower radial filter layer 30 , and the large particles of dirt in the liquid phase material are trapped in the upper axial filter layer 20 . As the running time increases, the dirt blocks the protective agent of the upper axial filter layer 20, and the liquid level rises accordingly, and then the gas-liquid two-phase flows through the gap between the outer panel 24 and the inner wall of the reactor upper head 40 and flows to the lower layer for radial filtration Layer 30, the large particle dirt of the liquid phase material is deposited on the upper axial filter layer 20. The material flowing to the lower radial filter layer 30, under the action of gravity, the liquid phase material enters the distribution plate 50 through the outer mesh cylinder 312, the inner mesh cylinder 311 and the installation hole 320 of the radial filter 31, and the gas phase material directly passes through the radial filter layer 31. The gap between the cover plate 313 and the support plate 315 of the filter 31 enters the inner mesh cylinder 311 and enters the distribution plate 50 through the installation hole 320, and the small particle dirt of the liquid phase material is trapped in the radial filter 31. As the running time increases, the dirt blocks the protective agent of the radial filter 31, and the liquid level rises thereupon, and then the gas-liquid two-phase directly passes through the gap between the cover plate 313 and the support plate 315 of the radial filter 31, Enter the inner mesh cylinder 311, enter the distribution plate 50 through the installation hole 320, and realize the filtration and deposition of the material through the above working process. The grille 21 is a Johnson mesh or wire mesh with gaps, and the material liquid flows axially through the filter layer by gravity to achieve preliminary filtration of the material liquid, retain large particles of dirt, and flow to the lower radial filter layer 30 . When due to long-term operation, more and more dirt accumulates, and the penetrating ability of the material liquid due to gravity weakens, and the liquid phase material accumulates inside the outer panel 24, and the liquid level becomes higher and higher, through the V opened by the outer panel 24 Shape or U-shaped notch flows to the lower radial filter layer 30, because the material is fed to the center of the upper axial filter layer 20, the material flows out of the liquid phase fluid speed through the outer panel 24, which is conducive to the deposition of large particles of dirt. When the liquid phase fluid of the material reaches the fouling disc plate 32, the liquid phase flow direction changes from axial flow to radial flow and flows through the radial filter 31, and is further filtered by the radial filter 31 protective agent to trap small particles of dirt. To further reduce the material dirt, the material fluid enters the distribution plate 50 through the outer mesh cylinder 312 , the inner mesh cylinder 311 and the installation hole 320 of the radial filter 31 . When the dirt is slowly deposited on the radial filter 31, the liquid level is getting higher and higher, and the effect of gravity is getting stronger and stronger, the radial filter 31 will play a full role. When the radial filter 31 deposits enough dirt, The material fluid directly passes through the gap between the cover plate 313 of the radial filter 31 and the support plate 315, enters the inner mesh cylinder 311, enters the distribution plate 50 through the installation hole 320, and is evenly distributed to the lower catalyst bed through the distribution plate 50 .

The basic principles and main features of the present utility model and the advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model The new model also has various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims (4)

1. A combination of axial and radial fouling filter equipment, comprising a reactor upper head (40), characterized in that: the upper outer surface of the reactor upper head (40) is provided with an inlet diffuser (10), The lower end of the inlet diffuser (10) is provided with an upper axial filter layer (20), and the outer surface of the lower end of the upper axial filter layer (20) is provided with a lower radial filter layer (30). A distribution plate (50) is arranged at the lower end of the filter layer (30); The upper axial filter layer (20) can be circular, square, hexagonal, etc., and the upper axial filter layer (20) can be cut into several edge filter grooves (22) and several internal strips Filter tank (23), described edge filter tank (22) is made up of outer panel (24), inner side panel (25), bottom support grid (21) and upper cover net (26), and described edge filter tank ( 22) and the internal strip filter tank (23) are connected to form the upper axial filter layer (20), which is placed on the lower radial filter layer (30) as a whole, and the height of the internal side panel (25) is 100-300mm , the height of the outer side panel (24) is 50-300mm higher than the inner side panel (25); The lower radial filter layer (30) is composed of a number of radial filters (31) arranged according to certain rules and fouling discs (32). Mounting holes (320) arranged regularly, each mounting hole (320) is equipped with a radial filter (31), and the fouling plate (32) is installed at the bottom of the radial filter (31), so Described radial filter (31) is made up of base plate (310), inner net cylinder (311), outer net cylinder (312), cover plate (313), vertical plate (314) and support plate (315), and described base plate (310), inner net tube (311), outer net tube (312), vertical plate (314) and support plate (315) are connected together by welding, and described cover plate (313) is independent part, can pass bolt, Clamps etc. are radially connected with the welded part of the radial filter (31), so that the filling and unloading of the protective agent. 2. A combination of axial and radial fouling filter equipment according to claim 1, characterized in that: 30-100 V-shaped notches or U-shaped notches are evenly distributed on the upper part of the outer panel (24), and the outer panel (24) (24) Keep a gap of 200-500mm with the inner wall of the upper head (40) of the reactor, and the bottom support grid (21) can be made with Johnson net or silk screen, wherein the gap is generally 1-5mm according to the particle size of the protective agent , the upper cover net (26) can be made with 1-2 layers of silk screen, and when the protective agent is filled, the upper cover net (26) is welded with the edge filter tank (22). 3. A combination of axial and radial fouling filter equipment according to claim 1, characterized in that: the radial filter (31) can have various structures, including but not limited to cylindrical, square, Polygonal or truncated cone, wherein the inner net cylinder (311) and the outer net cylinder (312) can be made of Johnson net or silk screen, wherein the gap is generally 1-5mm according to the particle size of the protective agent, and the diameter of the outer net cylinder (312) Generally, it is 300-500mm, and the diameter of the inner mesh cylinder (311) is generally 100-300mm. 4. A combination of axial and radial fouling filter equipment according to claim 1, characterized in that: the height of the inner mesh cylinder (311) and the outer mesh cylinder (312) is generally 400-700mm, and the support The diameter of the plate (315) should be greater than the diameter of the outer grid cylinder (312) by about 50mm, the gap between the cover plate (313) and the support plate (315) is 50-150mm, and the radial filter (31) passes through the bottom plate ( 310) is welded, bolted or clamped with the fouling plate (32), so that it is fixed on the fouling plate (32).

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