CN115672196B - Stirring type small-particle catalyst filling equipment - Google Patents
Stirring type small-particle catalyst filling equipment Download PDFInfo
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- CN115672196B CN115672196B CN202110848663.9A CN202110848663A CN115672196B CN 115672196 B CN115672196 B CN 115672196B CN 202110848663 A CN202110848663 A CN 202110848663A CN 115672196 B CN115672196 B CN 115672196B
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- 239000003054 catalyst Substances 0.000 title claims abstract description 103
- 238000003756 stirring Methods 0.000 title claims abstract description 27
- 239000002245 particle Substances 0.000 title claims abstract description 21
- 238000003860 storage Methods 0.000 claims abstract description 47
- 230000000903 blocking effect Effects 0.000 claims abstract description 35
- 238000013461 design Methods 0.000 claims description 14
- 210000005239 tubule Anatomy 0.000 claims description 12
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 230000001133 acceleration Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 17
- 239000000463 material Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 230000008859 change Effects 0.000 description 4
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- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
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- 239000003814 drug Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
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- 238000005299 abrasion Methods 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
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- 238000013019 agitation Methods 0.000 description 1
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- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
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- 238000005272 metallurgy Methods 0.000 description 1
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- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
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- 230000008569 process Effects 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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Abstract
The invention relates to the technical field of catalyst filling equipment by means of pneumatic conveying, in particular to stirring type small-particle catalyst filling equipment, which comprises the following components: the catalyst detention device comprises a feeding pipe which is transversely arranged; the venturi tube feeding device comprises a venturi tube and a storage tube, wherein the upper end of the storage tube is vertically communicated with the feeding tube, and the lower end of the storage tube is vertically communicated with the venturi tube; a flow blocking plate is further obliquely connected to the inner wall of the feeding pipe, the flow blocking plate is right opposite to the inlet of the storage pipe, the storage pipe receives the granular catalyst screened out by the flow blocking plate, and the flow blocking plate is further provided with at least air holes; an air bag for dynamically adjusting the supply amount of the catalyst is arranged at the position, opposite to the outlet of the storage pipe, of the venturi tube, so that the technical problem of how to stably and accurately quantitatively fill the catalyst is solved.
Description
Technical Field
The invention relates to the technical field of filling equipment for conveying catalysts by virtue of air force, in particular to stirring type small-particle catalyst filling equipment.
Background
Solid particle conveying problems exist in the fields of petrochemical industry, environmental protection, mine metallurgy, electric power and the like, and generally, the solid particle conveying mode comprises mechanical conveying, gas flow conveying and liquid flow conveying, and when solid particles are conveyed to a closed system, two methods of gas flow conveying and liquid flow conveying can be adopted.
In the liquid flow conveying mode, a pulping process is usually required, and a slurry pump is adopted to inject the slurry into equipment, so that the defects of complex working procedures, more equipment numbers, high power consumption, serious abrasion of a pump, short operation period, large maintenance amount, high operation cost and the like exist. In the liquid conveying mode, common equipment is a meter and electromagnetic valve control, such as a medicament filling scheme is introduced in paper 'design and implementation of a multi-path medicament high-precision filling device'; the paper of the mechanism and improvement measure of filling pretreatment medicament for recovering methanol in Changqing gas field introduces that in actual production, the flow of a feed pump is frequently regulated, the feed pump is easy to damage, and the flow of the feed pump is unstable after regulation.
In the airflow conveying mode, fine solid particles can flow along with telling airflow, and the conveying of the solid particles is not completed, so that the fluidized bed is generally filled with catalyst in the mode, a venturi tube is used as a main component in the prior art, for example, a venturi tube is arranged below a material tube, negative pressure can be formed by high-speed airflow through a throat of the venturi tube, and materials are sucked out; however, there is no improvement in the specific structure of the venturi tube, nor is there any mention; although a plurality of technicians recognize that high-speed air flow passes through the throat pipe of the venturi tube, the generated negative pressure can generate certain attractive force on particles, so that the system performance is improved; however, no other intensive researches are carried out on the venturi tube, in order to solve the problem of how to accurately fill the catalyst, the prior art is mostly realized by adopting a mechanical rotary table, but after the mechanical design is used for a period of time, the gap of a rotary part is worn and enlarged, so that the catalyst with small size leaks out from the gap, and excessive catalyst enters the reactor, thereby influencing the normal operation of the reactor.
The existing filling device cannot solve two problems: firstly, the catalyst is blocked in a material pipe, so that the blanking is not smooth, the high-speed airflow in the throat of a venturi tube cannot take away the quantitative catalyst, and the catalyst filling amount is insufficient; secondly, the air supply part works unstably, and the air flow is supplied in a large time, so that the catalyst filling amount is unstable; the damage caused by excessive catalyst filling is larger than that caused by insufficient catalyst filling, and the specific reasons are as follows:
According to the working principle of the fluidized bed reactor, the catalyst needs to be continuously added into the reactor through a feeding pipe. The designer can mark the optimal adding quantity of the catalyst according to the actual situation, so that the fluidized bed reactor has the highest efficiency and the best indexes, but in actual production, if the airflow of the catalyst filling equipment fluctuates (becomes larger or smaller), the adding quantity and the filling speed of the catalyst can fluctuate, thereby influencing the normal production of the reactor.
In terms of catalyst loading: if the catalyst injection amount is smaller than the catalyst injection amount required for the design production capacity of the apparatus, the production capacity of the apparatus is lowered, but there is no influence on the quality of the product; if the catalyst addition amount is too large and is larger than the catalyst injection amount required by the design production capacity of the device, the heat generated by the polymerization reaction is larger than the heat removal capacity of a heat exchanger of the reactor, and the inside of the reactor is subjected to overheat reaction to generate caking, so that a distribution plate and a discharge hole are blocked, and the device is stopped; in addition, exceeding the design throughput can result in a reactor with a material feed and powder take-off capacity that is not matched to that of the reactor, making the plant operation impractical.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide stirring type small-particle catalyst filling equipment which is used for solving the technical problem of how to stably and accurately and quantitatively fill catalyst.
In order to achieve the above purpose, the present invention provides the following technical solutions:
An agitated small particle catalyst injection apparatus comprising:
the catalyst detention device comprises a feeding pipe which is transversely arranged;
The venturi tube feeding device comprises a venturi tube and a storage tube, wherein the upper end of the storage tube is vertically communicated with the feeding tube, and the lower end of the storage tube is vertically communicated with the venturi tube;
the feeding pipe is further provided with a baffle in inclined connection on the inner wall, the baffle is right opposite to the inlet of the storage pipe, the storage pipe receives the granular catalyst screened out by the baffle, and the baffle is further provided with at least air holes;
and an air bag for dynamically adjusting the supply amount of the catalyst is arranged at the position, opposite to the outlet of the storage pipe, of the venturi tube.
Wherein the filling device further comprises a stirring device which extends from the feed pipe into the storage pipe through the flow blocking plate.
The air flow guiding device is characterized in that the edge of the air flow blocking plate is further connected with a first air flow guiding plate used for guiding a part of air flow blown from the right side of the feeding pipe, and a cavity formed by the first air flow guiding plate and the upper wall of the feeding pipe continuously becomes smaller along with the entering of the air flow.
The flow blocking plate is further provided with a second through hole, the axis of the second through hole is parallel or coincident with the axis of the storage tube, and the second through hole is further provided with a sliding bearing.
The stirring device further comprises a rotating shaft, the rotating shaft penetrates through the sliding bearing, and a plurality of stirring blocks are arranged in the axial direction of the rotating shaft part in the storage tube from top to bottom.
The rotating shaft positioned on the other side of the flow blocking plate is connected with an impeller, and the impeller rotates along with the acceleration of air flow and further drives the stirring block to rotate through the rotating shaft.
The storage pipe is divided into a thick pipe, a reducer pipe and a thin pipe from top to bottom, wherein the thick pipe is communicated with the feeding pipe, and the thin pipe is communicated with the venturi pipe.
The venturi is an inserted venturi and comprises a first conical tube and a second conical tube which are sequentially connected, the first conical tube is provided with a first straight tube which extends out, the second conical tube is provided with a second straight tube which extends out, the inner diameter of the second straight tube is smaller than that of the first straight tube so that the second straight tube is inserted into the first straight tube, and a throat is formed at the joint of the second straight tube and the first straight tube.
The air bag is positioned at the throat below the tubule and connected with the second straight pipe, and the center of the air bag is provided with a first through hole.
Wherein the air bag is in a hemispherical shape.
The gas volume V Air flow in the air bag and the shielding area S Shadow of the tubule after the air bag is inflated meet the power function relation, and the power function is as follows:
Where r is the balloon radius, V Air flow is the volume of gas entering the balloon, S Shadow is the occlusion area, and m is a constant.
The feeding pipe is internally provided with a plurality of second guide plates, the second guide plates are arranged in the feeding pipe at intervals, and the edge of the air inlet end of each second guide plate adopts an inclination design.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. The invention provides stirring type small-particle catalyst filling equipment, which takes gas pressure as a power source, realizes the aim of accurately filling a catalyst, solves the technical problems that the catalyst is blocked in a material pipe, the blanking is not smooth, the high-speed air flow of a venturi throat cannot take away a fixed amount of catalyst, and the catalytic filling amount is insufficient, and simultaneously solves the technical problems that the air supply part works unstably, the air supply part is large and small, and the catalyst filling amount is unstable, so that the catalyst filling amount is ensured to be stable, and various reaction indexes of a fluidized bed are ensured to be stable.
2. The stirring type small-particle catalyst filling equipment solves the problem of adding catalyst in the storage pipe, and the catalyst filling point of the fluidized reactor is generally arranged at the top of the reactor.
3. The stirring type small-particle catalyst filling equipment provided by the invention has a plurality of application scenes, is particularly suitable for fluidized bed reactors, can be also applied to the intersection of two pipelines, can dynamically adjust the size of fluid in a second pipeline through the air bag, and can ensure the quantity of catalyst blown into the reactor in unit time to be determined by controlling the constant flow of gas in the venturi tube, namely, when the gas in the venturi tube in the filling device fluctuates, the filling equipment can realize dynamic adjustment, thereby simplifying the control index and being beneficial to improving the control level of the device.
4. The stirring type small-particle catalyst filling device provided by the invention has less sealing points because of no reagent taking and measuring mechanism, so that the condition of catalyst leakage can not occur, and the environmental pollution is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a filling apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic view of a filling apparatus according to an embodiment of the present invention;
FIG. 3 is an enlarged view of a portion of the throat of the filling device of FIG. 1 where the venturi has excessive airflow;
Wherein:
1-a feeding pipe;
11-spoilers;
111-pores;
12-a first deflector;
13-a sliding bearing;
14-a second deflector;
2-a material storage pipe;
21-thick pipe;
22-reducer pipe;
23-tubules;
3-venturi;
31-a first conical tube;
311-a first straight tube;
32-a second tapered tube;
321-a second straight tube;
33-throat;
4-an air bag;
5-stirring device;
51-rotating shaft;
52-stirring blocks;
53-impeller.
Detailed Description
The following detailed description of the present invention is provided with reference to the accompanying drawings and specific embodiments, so as to further understand the purpose, the scheme and the effects of the present invention, but not to limit the scope of the appended claims.
Certain terms are used throughout the description and following claims to refer to particular components or elements, and it will be appreciated by those of ordinary skill in the art that a technical user or manufacturer may refer to the same component or element by different terms or terminology. The present specification and the following claims do not take the form of an element or component with the difference in name, but rather take the form of an element or component with the difference in function as a criterion for distinguishing. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. The term "coupled," as used herein, includes any direct or indirect electrical connection. Indirect electrical connection means include connection via other devices.
It should be noted that, in the description of the present invention, terms such as "transverse," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and "about," or "about," "substantially," "left and right," etc. indicate orientations or positional relationships or parameters, etc. based on the orientation or positional relationships shown in the drawings, are merely for convenience of description and simplicity of description, and do not indicate or imply that the apparatus or elements being referred to must have a specific orientation, a specific size, or be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
The embodiment of the invention provides stirring type small-particle catalyst filling equipment, which comprises the following components:
A catalyst retention device comprising a feed pipe 1 arranged transversely; the venturi tube feeding device comprises a venturi tube 3 and a storage tube 2, wherein the upper end of the storage tube 2 is vertically communicated with the feeding tube 1, and the lower end of the storage tube 2 is vertically communicated with the venturi tube 3;
Wherein, a flow blocking plate 11 is further arranged on the inner wall of the feeding pipe 1 in an inclined connection manner, the flow blocking plate 11 is positioned at the inlet of the storage pipe 2, the storage pipe 2 receives the granular catalyst screened out by the flow blocking plate 11, and the flow blocking plate 11 is further provided with at least one air hole 111; although the air flow from the right side can pass through, because of the choking effect of the choking plate 11, a lot of granular catalyst remains in the storage pipe 2, and the function of supplementing the storage pipe 2 with catalyst is completed.
An air bag 4 for dynamically adjusting the catalyst supply is arranged in the venturi tube 3 at a position opposite to the outlet of the storage tube 2.
The filling device further comprises a stirring device, the stirring device penetrates through the flow blocking plate 11 and extends into the storage tube 2 from the feed tube 1, the edge of the flow blocking plate 11 is further connected with a first flow guiding plate 12 for guiding a part of air flow blown from the right side of the feed tube 1, and a cavity formed by the first flow guiding plate 12 and the upper wall of the feed tube 1 continuously becomes smaller along with the entering of the air flow.
In the embodiment of the present invention, the feeding pipe 1 is internally provided with a gas flow rich in catalyst particles, the components of the gas are selected according to the catalyst requirements, and the flow blocking plate is used for blocking the gas flow entering along the feeding pipe 1 and sieving out the granular catalyst through the exhaust hole 111. In the embodiment of the present invention, an inclination angle exists between the direction of the guide plate 12 and the feeding pipe 1, and the space is the largest when the air flow just enters the guide plate 12, and then the space is gradually reduced, and a guide cavity is formed between the first guide plate 12 and the upper wall surface of the feeding pipe; the volume of the flow guiding cavity is gradually reduced so as to accelerate the airflow, so that the airflow has larger kinetic energy to push the impeller, and further drives the rotating shaft and the stirring block fixed on the rotating shaft.
The flow blocking plate 11 is further provided with a second through hole, the axis of the second through hole is parallel to or coincides with the axis of the storage tube 2, the rotating shaft 51 passes through the second through hole and is arranged on the flow blocking plate 11 in a penetrating manner, while the rotating shaft 51 is kept at the near central position of the storage tube 2 in a state parallel to the wall of the storage tube 2, a plurality of stirring blocks 52 are arranged at the part of the rotating shaft 51 in the storage tube 2 from top to bottom along the axial direction, an impeller 53 is fixed at the end part of the rotating shaft 51 at the other side of the flow blocking plate 11, the impeller 53 rotates along with the acceleration of air flow, so that the rotating shaft 51 drives the stirring blocks 52 to rotate together, the stirring blocks 52 are used for preventing the adhesion and blocking of catalysts, and in order to facilitate the rotation of the rotating shaft 51, the sliding bearing 13 is preferably additionally arranged at the penetrating position of the rotating shaft 51 and the flow blocking plate 11.
Wherein, the storage pipe 2 is divided into a thick pipe 21, a reducing pipe 22 and a thin pipe 23 from top to bottom, the thick pipe 21 is communicated with the feeding pipe 1, and the thin pipe 23 is communicated with the venturi pipe 3.
In the embodiment of the invention, the flow blocking plate is positioned at the inlet of the storage pipe, the storage pipe receives the granular catalyst screened out by the flow blocking plate, the storage pipe comprises a thick pipe section, a reducing pipe section and a thin pipe section, the thick pipe section is connected with the thin pipe section through the reducing pipe section, the thick pipe section is communicated with the feed pipe, and the thin pipe section is communicated with the venturi pipe; the air bag is positioned in the middle of the venturi tube and is opposite to the outlet of the storage tube, and the air bag is provided with a first through hole; the venturi tube feeding device has the function of accurately supplying a certain mass of catalyst to the reactor; and the supply amount of the catalyst can be dynamically adjusted when the airflow suddenly changes.
In this embodiment, the venturi tube 3 is an insert-type venturi tube, and includes a first tapered tube 31 and a second tapered tube 32 sequentially connected, where the first tapered tube 31 has a first extended straight tube 311, the second tapered tube 32 has a second extended straight tube 321, and the inner diameter of the second straight tube 321 is smaller than that of the first straight tube 311 so that the second straight tube 321 is inserted into the first straight tube 311, and a throat 33 is formed at a joint between the second straight tube 321 and the first straight tube 311.
Wherein, the air bag 4 is positioned at the throat 33 below the tubule 23 and connected to the second straight pipe 321, and a first through hole is formed in the center of the air bag 4.
Wherein the air bag 4 is in a hemispherical shape. The gas volume V Air flow in the air bag 4 and the shielding area S Shadow of the tubule after the air bag is inflated satisfy a power function relation, and the power function is as follows:
Where r is the balloon radius, V Air flow is the volume of gas entering the balloon, S Shadow is the occlusion area, and m is a constant.
In the embodiment of the present invention, the impeller 53 is located in the feed pipe 1, and the impeller 53 is located at an inlet of a diversion cavity (a cavity enclosed by the first diversion plate 12 and an upper wall of the feed pipe 1). The edge of the flow baffle 11 is connected with a first flow guide plate 12, the first flow guide plate 12 is inclined downwards, so that a part of air flow blown from the right side of the feeding pipe 1 is guided by the first flow guide plate 12, the cavity of the upper wall of the first flow guide plate 12 and the feeding pipe 1 is continuously reduced, the air flow is continuously accelerated and finally blown onto the impeller 53, the impeller 53 rotates, the impeller 53 drives the stirring block 52 to rotate through the rotating shaft 51, and therefore the catalyst in the coarse pipe section 21 is continuously stirred, the blocking of the storage pipe 2 by granular catalyst agglomeration is avoided, and the catalyst can smoothly pass through the thin pipe section 23. The thin pipe section 23 is connected with the thick pipe section 21 through the variable diameter pipe section 22, the granular catalyst falls into the throat 33 through the thick pipe section 21, the variable diameter pipe section 22 and the thin pipe section 23, is taken away by the air flow flowing through the throat 33 at a high speed, and finally enters the reactor. The gas flow in the venturi 3 is blown from the conical tube 32, and what composition of the gas flow is used depends on the catalyst and the internal environment of the reactor, preferably nitrogen. The conical tube 32 is connected with the throat 33, the air bag 4 is connected on the conical tube 32, the air bag 4 is just positioned below the thin tube section 23, a first through hole is formed in the center of the air bag 4, and the size of the hole diameter is determined according to the rubber material and design requirements. When the air flow meets the design standard, the air flow from the conical tube 32 can pass through the first through hole, and the kinetic energy loss is small; if the air flow from the tapered tube 32 increases, the air bag 4 is inflated by the wind pressure, the outlet of the thin tube section 23 is gradually blocked, and the catalyst from the thin tube section 23 is also reduced; if the flow of air from the conical tube 32 is too small, the balloon 4 collapses, making the outlet of the thin tube section 23 larger and the catalyst coming out of the thin tube section 23 larger, so that the amount of catalyst entering the reactor remains within the design limits.
The invention can expand and contract along with the air flow by means of the air bag 4, so that the size of the outlet of the thin pipe section 23 is changed, and the large change of the quantity of the catalyst blown into the reactor after the air flow is greatly changed is avoided; it is achieved that the venturi 3 can dynamically adjust the catalyst supply when the gas flow suddenly changes. The design can also be applied to other occasions, for example, an air bag 4 is additionally arranged at the intersection of the pipelines, if the medium addition amount in one pipeline A is too large, the ventilation amount of the other pipeline B can be increased, so that the air bag 4 is expanded, the outlet of the pipeline A is blocked, the medium addition amount in the pipeline A is indirectly reduced, the aim of adjusting the mixing ratio of the fluid media in the pipeline A and the pipeline B is finally achieved, and a new control means is provided for dynamically adjusting the mixing ratio of the media in the filling equipment.
In the application, the balloon is hemispherical, the radius of the balloon is defined as r, and the volume V Hemisphere with a ball is as follows:
After the air bag is inflated, the tubule section in the vertical direction is shielded, the shielding area is the largest cross-sectional area in the horizontal direction of the air bag, and the area calculation formula is as follows:
Is available in the form of
The area of the balloon is then:
because the air bag is made of a certain rubber, the elastic modulus of the air bag is a fixed value, the expansion volume of the air bag accords with a linear rule, namely the ratio of the volume of air entering the air bag to the volume of the air bag is a certain constant, and the air bag is specifically:
0k＜1
this can be further achieved:
If constant of
Then it is possible to obtain:
Referring to the math manual, it can be seen that: it is a variant of the power function (proportional enlargement or reduction of the dependent variable S Shadow with unchanged independent variable V), embodied as:
When 0< m <1, the dependent variable S Shadow is scaled down m-fold;
When m >1, the dependent variable S Shadow is amplified m times.
Although the curve of the function varies on the Y axis, the increasing trend of the curve still accords with the curve rule of the power function.
Because 0< k <1, 0< m <1.
Exponentiation functionIn which indexX is more than or equal to 0,0< m <1, the curve shown in the figure 3 can be obtained, the X axis is V Air flow air inflow, and the Y axis is S Shadow
In fig. 3, τ is the optimum intake air amount at the time of normal operation of the fluidized bed reactor, and the catalyst charge amount is the optimum charge amount.
It is understood that the more catalyst Q Falling down falls from the (vertical) tubule segment, the more catalyst is blown into the reactor by the gas stream V Air flow ; the factor influencing the catalyst Q Falling down is the size of the air bag, namely the shielding effect of the air bag on the blanking opening of the thin pipe section.
According to the trend of the curve, when V Air flow is smaller, S Shadow is rapidly lowered (the air bag is rapidly contracted), so that the shielding effect of the air bag on the (vertical direction) thin pipe section is obviously weakened, and more catalyst is further dropped from the thin pipe section. Then although V Air flow becomes smaller, the amount of catalyst falling from the tubule segments increases, thereby ensuring that the total amount of catalyst added to the fluidized bed reactor remains stable; the dynamic adjustment function of the filling equipment is realized.
From the trend of the curve, as V Air flow increases, S Shadow increases slowly (balloon volume increases slowly); although the shielding effect of the balloon on the (vertical) thin tube section was slightly enhanced (the catalyst addition amount was slightly reduced), the catalyst falling amount Q Falling down was not significantly reduced, which was substantially the same as before the increase of V Air flow . It was found that although V Air flow was increased, the amount of catalyst falling from the fine tube section was not significantly increased, thereby ensuring that the total amount of catalyst fed into the fluidized-bed reactor was not significantly increased.
The airbag 4 is one of the important innovation points of the technical scheme, and the specific reasons are as follows:
in the design stage, a designer can calibrate an optimal adding amount of the catalyst according to specific conditions, and can design an optimal air inflow tau of the catalyst filling device at the same time, so that the optimal performance of the reactor is ensured. However, in practical application, the air inflow of the catalyst filling device is inevitably fluctuated, so that the novel catalyst filling device is required to have certain adjusting capability, and the adding amount of the catalyst is ensured not to be fluctuated greatly along with the change of the air flow (size).
According to the analysis, the blocking of the air bag volume change to the blanking opening of the tubule presents a power function relation; the concrete steps are as follows:
when the air flow becomes smaller, the volume of the air bag is rapidly reduced (the blocking effect is rapidly weakened), so that the catalyst falling down from the tubule in the vertical direction is rapidly increased, the catalyst addition amount is rapidly adjusted, the overall stability of the catalyst filling amount is ensured, and the air bag with the structure is sensitive to the air flow reducing reaction and has larger adjustment allowance.
When the air flow becomes large, the volume of the air bag is slowly increased (the blocking effect is slowly increased), so that the catalyst falling down from the tubule (in the vertical direction) is not obviously increased, and the filling amount of the catalyst is ensured to be stable as a whole.
The change of the air bag volume of the structure accords with a power function relation, which is an important discovery of the invention. The air bag with the structure is very sensitive to air flow reduction, can make quick response and plays a good role in dynamic adjustment; however, the catalyst filling device is insensitive to the increase of the air flow, ensures that the filling amount of the catalyst cannot be increased limitlessly along with the increase of the air flow, increases safety guarantee for the stable operation of equipment, and effectively avoids serious faults of the reactor caused by excessive catalyst filling. Because the airbag expands only a small amount when the airflow increases more, the amount of catalyst that falls down is substantially the same as before; thereby skillfully avoiding the problem that the catalyst of the fluidized bed reactor is excessively filled when the air flow is overlarge.
Referring additionally to fig. 2, fig. 2 is a schematic structural view of an agitation type small particle catalyst filling apparatus according to a second embodiment of the present application. The structure of this embodiment is the same as that of the first embodiment, except that two second deflectors 14 are further added in this embodiment, the multiple second deflectors 14 are disposed at intervals in the feeding pipe 1, and the air inlet end edges of the two second deflectors adopt an inclination design, so that the airflow is accelerated, the particulate matters in the airflow strike the spoiler 11 and cannot turn, the airflow easily changes direction, and the airflow flows through the exhaust hole 111, so that more catalyst particles remain in the cavity enclosed by the coarse pipe section 21 and the spoiler 11. The quantity of the guide plates is selected according to actual conditions, and the inclined surfaces of the guide plates have the function of gradually reducing the space so that the passing air flow is accelerated.
The present invention is not limited to the above-mentioned embodiments, and any equivalent embodiments which can be changed or modified by the technical content disclosed above can be applied to other fields, but any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical substance of the present invention without departing from the technical content of the present invention still belong to the protection scope of the technical solution of the present invention.
Claims (7)
1. An agitated small particle catalyst injection apparatus comprising:
the catalyst detention device comprises a feeding pipe which is transversely arranged;
The venturi tube feeding device comprises a venturi tube and a storage tube, wherein the upper end of the storage tube is vertically communicated with the feeding tube, and the lower end of the storage tube is vertically communicated with the venturi tube;
The method is characterized in that: a flow blocking plate is further obliquely connected to the inner wall of the feeding pipe, the flow blocking plate is right opposite to the inlet of the storage pipe, the storage pipe receives the granular catalyst screened out by the flow blocking plate, and the flow blocking plate is further provided with at least air holes;
An air bag for dynamically adjusting the supply amount of the catalyst is arranged in the venturi tube at a position opposite to the outlet of the storage tube;
the storage pipe is divided into a thick pipe, a reducing pipe and a thin pipe from top to bottom, the thick pipe is communicated with the feeding pipe, and the thin pipe is communicated with the venturi pipe;
The venturi tube is an inserted venturi tube and comprises a first conical tube and a second conical tube which are sequentially connected, the first conical tube is provided with a first extending straight tube, the second conical tube is provided with a second extending straight tube, the inner diameter of the second straight tube is smaller than that of the first straight tube so that the second straight tube can be inserted into the first straight tube, and a throat is formed at the joint of the second straight tube and the first straight tube;
The air bag is positioned at the throat below the tubule and connected with the second straight pipe, and a first through hole is formed in the center of the air bag;
the air bag is hemispherical;
the gas volume V Air flow in the air bag and the shielding area S Shadow of the tubule after the air bag is inflated meet the power function relation, and the power function is as follows:
Where r is the balloon radius, V Air flow is the volume of gas entering the balloon, S Shadow is the occlusion area, and m is a constant.
2. Filling device according to claim 1, characterized in that: the filling device further comprises a stirring device which extends from the feed pipe into the storage pipe through the flow blocking plate.
3. A filling device according to claim 2, wherein: the air flow guiding device is characterized in that the edge of the air flow blocking plate is further connected with a first air flow guiding plate used for guiding a part of air flow blown from the right side of the feeding pipe, and a cavity formed by the first air flow guiding plate and the upper wall of the feeding pipe continuously becomes smaller along with the entering of the air flow.
4. A filling device according to claim 2 or 3, wherein: the flow blocking plate is further provided with a second through hole, the axis of the second through hole is parallel or coincident with the axis of the storage pipe, and the second through hole is further provided with a sliding bearing.
5. Filling device according to claim 4, wherein: the stirring device further comprises a rotating shaft, the rotating shaft penetrates through the sliding bearing, and a plurality of stirring blocks are arranged in the axial direction of the rotating shaft part in the storage tube from top to bottom.
6. Filling device according to claim 5, wherein: the rotating shaft positioned at the other side of the flow blocking plate is connected with an impeller, and the impeller rotates along with the acceleration of air flow and further drives the stirring block to rotate through the rotating shaft.
7. Filling device according to claim 1, characterized in that: and a plurality of second guide plates are further arranged in the feeding pipe, the second guide plates are arranged in the feeding pipe at intervals, and the edge of the air inlet end of each second guide plate adopts an inclination design.
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| CN202110848663.9A CN115672196B (en) | 2021-07-23 | 2021-07-23 | Stirring type small-particle catalyst filling equipment |
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| CN202110848663.9A CN115672196B (en) | 2021-07-23 | 2021-07-23 | Stirring type small-particle catalyst filling equipment |
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| CN115672196B true CN115672196B (en) | 2024-06-25 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102049223A (en) * | 2009-10-27 | 2011-05-11 | 中国石油化工股份有限公司 | Device and method for filling catalyst on line by pneumatic transmission |
| CN205527711U (en) * | 2016-03-22 | 2016-08-31 | 中国石油天然气股份有限公司 | Mercury absorbing device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2621833B1 (en) * | 1987-10-14 | 1990-03-23 | Total France | DEVICE FOR INJECTING A HYDROCARBON LOAD INTO A CATALYTIC CRACKING REACTOR |
| FR2644795B1 (en) * | 1989-03-24 | 1993-12-17 | Institut Francais Petrole | METHOD AND DEVICE FOR INJECTING THE HYDROCARBON LOAD IN A FLUID CATALYTIC CRACKING PROCESS |
| CA2194525A1 (en) * | 1996-01-17 | 1997-07-18 | Matthew Alan Cox | Water mist fire suppression device |
| JP2004313928A (en) * | 2003-04-16 | 2004-11-11 | Yms:Kk | Method for crushing coagulated powder |
| US8479501B2 (en) * | 2009-07-20 | 2013-07-09 | International Engine Intellectual Property Company, Llc | Exhaust cooling module for SCR catalysts |
| KR101188635B1 (en) * | 2010-07-01 | 2012-10-08 | 주식회사 테노바엔비타 | Ventury tube type Nano Bubble proceded water Generator |
| JP6257636B2 (en) * | 2012-11-27 | 2018-01-10 | ラミナー カンパニー，リミテッド | Reactor for mixing and production method using the reactor |
| CN210934851U (en) * | 2019-09-24 | 2020-07-07 | 奥星制药设备（石家庄）有限公司 | Back-blowing fluidized bed |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102049223A (en) * | 2009-10-27 | 2011-05-11 | 中国石油化工股份有限公司 | Device and method for filling catalyst on line by pneumatic transmission |
| CN205527711U (en) * | 2016-03-22 | 2016-08-31 | 中国石油天然气股份有限公司 | Mercury absorbing device |
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