Fluidized bed agent adding tank, fluidized bed and coal tar hydrogenation system

Abstract

The utility model provides a boiling bed agent adding tank, a boiling bed and a coal tar hydrogenation system, oil liquid is contained in a tank body, an agent adding pipe extends into the tank body and is inserted into the oil liquid, and oil sealing is carried out through the oil liquid; when a catalyst is added into the tank body through the catalyst adding pipe, if the catalyst floats and accumulates on the liquid level of oil in the catalyst adding pipe to cause blockage of the catalyst adding pipe, the telescopic nitrogen blowing pipe can be lengthened, so that the telescopic nitrogen blowing pipe is inserted into the catalyst adding pipe to blow the blocked catalyst; according to the invention, nitrogen is introduced into the oil liquid, so that the blocked catalyst is blown into the oil liquid under the action of nitrogen, and soaking and dispersing are accelerated, so that the technical problems that when the catalyst is added through an agent adding pipe in the prior art, a large amount of catalyst often floats and accumulates on the oil liquid in the agent adding pipe to cause blockage of the agent adding pipe, and the coal tar hydrogenation process is seriously influenced are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of coal tar hydrogenation, and particularly relates to a boiling bed agent adding tank, a boiling bed and a coal tar hydrogenation system. BACKGROUND

[0002] Coal tar hydrogenation is a process for producing light fuel oil, specifically refers to the coal tar is used hydrogenation modification process, namely under certain temperature, pressure and catalyst, complete desulfurization, unsaturated hydrocarbon saturation, dehydrogenation reaction, aromatic saturation and other reactions, in order to achieve the purpose of improving the stability of coal tar, reducing the sulfur content and aromatic content, ultimately obtain naphtha and high-quality fuel oil, its product quality can reach gasoline, diesel blending oil index. With the continuous progress of technology and the improvement of process, coal tar hydrogenation technology will provide more powerful support for realizing the clean and efficient utilization of coal resources.

[0003] In the process of coal tar hydrogenation, generally in the boiling bed. In the prior art, when adding catalyst to the boiling bed, the catalyst is first added to the agent adding tank of the boiling bed, and during the coal tar hydrogenation process in the boiling bed, the catalyst is sent into the boiling bed reactor through the agent adding tank. In order to prevent air from entering the agent adding tank with the catalyst, oil is generally contained in the agent adding tank, and the agent adding pipe on the agent adding tank is oil sealed by the oil.

[0004] However, since the catalyst is soaked, dispersed and sunk slowly in the oil, when the catalyst is added through the agent adding pipe, a large amount of catalyst often floats and accumulates on the oil in the agent adding pipe, causing the agent adding pipe to be blocked, which seriously affects the process of coal tar hydrogenation. UTILITY MODEL CONTENTS

[0005] In order to solve the technical problem that a large amount of catalyst often floats and accumulates on the oil in the agent adding pipe when the catalyst is added through the agent adding pipe, causing the agent adding pipe to be blocked, which seriously affects the process of coal tar hydrogenation, the utility model provides a boiling bed agent adding tank, a boiling bed and a coal tar hydrogenation system.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] Firstly, the utility model provides a boiling bed agent adding tank, which comprises a tank body, an agent adding pipe and a telescopic nitrogen blowing pipe; the tank body contains oil; the agent adding pipe is arranged on the tank body and extends into the tank body and partially inserts into the oil; the telescopic nitrogen blowing pipe is connected with a nitrogen source; and the telescopic nitrogen blowing pipe is movably arranged above the agent adding pipe.

[0008] Optionally, the telescopic nitrogen blowing pipe comprises a telescopic part and a blowing pipe; the telescopic part is arranged above the agent adding pipe; the blowing pipe is connected to the telescopic part; and the blowing pipe is communicated with a nitrogen source.

[0009] Optionally, a lower end of the blowing pipe is provided with a trumpet mouth, and an outer diameter of the trumpet mouth is the same as an inner diameter of the agent adding pipe.

[0010] Optionally, a blowing branch pipe is arranged on the agent adding pipe, and the blowing branch pipe is communicated with an inside of the agent adding pipe; and the blowing branch pipe is detachably connected to the telescopic nitrogen blowing pipe.

[0011] Optionally, an included angle between the blowing branch pipe and the agent adding pipe is 30-45 degrees; and the blowing branch pipe is a plurality of blowing branch pipes, and the plurality of blowing branch pipes are sequentially arranged from top to bottom.

[0012] Optionally, the tank body is further provided with a liquid level detection assembly.

[0013] Optionally, the tank body is further provided with a nitrogen inlet, the nitrogen inlet is arranged below a liquid surface of the oil, and the nitrogen inlet is communicated with a nitrogen source.

[0014] Optionally, the tank body is further provided with a nitrogen outlet, a catalyst outlet and an oil inlet; the nitrogen outlet is arranged on an upper side of the tank body; the catalyst outlet is arranged on a lower side of the tank body, and the catalyst outlet is communicated with a boiling bed reactor; and the nitrogen outlet, the oil inlet and the catalyst outlet are communicated with an inside of the tank body.

[0015] In a second aspect, the utility model also provides a boiling bed, the boiling bed comprises a boiling bed reactor, a nitrogen pump and the boiling bed agent adding tank of any one; the boiling bed agent adding tank comprises a tank body, an agent adding pipe and a telescopic nitrogen blowing pipe; the nitrogen pump is communicated with the telescopic nitrogen blowing pipe; the agent adding pipe is arranged on the tank body; and the tank body is communicated with the boiling bed reactor.

[0016] In a third aspect, the utility model also provides a coal tar hydrogenation system, and the coal tar hydrogenation system comprises the boiling bed.

[0017] The utility model has the advantages of the following:

[0018] The utility model provides a kind of boiling bed adds agent tank, oil liquid is contained in tank body, adding agent pipe extends into tank body, and inserts oil liquid, and oil seal is carried out by oil liquid;When adding catalyst into tank body by adding agent pipe, if catalyst floating accumulation on the oil level in adding agent pipe occurs, when adding agent pipe appears blockage, telescopic nitrogen blowing pipe can be lengthened, and telescopic nitrogen blowing pipe is inserted into adding agent pipe, and the catalyst of blockage is purged, and the catalyst of blockage is blown into oil liquid under the action of nitrogen, accelerates immersion and disperses, to eliminate the technical problem that when adding catalyst by adding agent pipe in prior art, a large amount of catalyst often floats and accumulates on the oil in adding agent pipe, causing adding agent pipe blockage, seriously affect the process of coal tar hydrogenation. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the schematic diagram of adding agent tank in the utility model;

[0020] Figure 2 It is the schematic diagram of telescopic nitrogen blowing pipe in the utility model.

[0021] Wherein: 1, tank body;11, nitrogen inlet;12, nitrogen outlet;13, catalyst outlet;14, oil inlet;2, adding agent pipe;21, gas branch pipe;3, telescopic nitrogen blowing pipe;31, telescopic part;32, blowing pipe;33, horn mouth;4, oil. DETAILED DESCRIPTION

[0022] To make the purpose, technical scheme and advantage of the utility model embodiment clearer, the technical scheme in the utility model embodiment will be described clearly and completely in conjunction with the drawings in the utility model embodiment below, obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiment. The description of at least one exemplary embodiment is actually only illustrative, but not as any limitation on the utility model and its application or use. Based on the embodiment in the utility model, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of the utility model protection.

[0023] It should be noted that the terms used here are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the utility model. As used herein, the singular form is intended to include the plural form unless the context clearly dictates otherwise, and furthermore, it should be understood that when the terms "comprise" and / or "include" are used in the specification, they mean that the features, steps, operations, devices, components and / or combinations thereof are present.

[0024] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0025] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0026] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0027] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0028] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict. The utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0029] In the process of coal tar hydrogenation, the catalyst is usually added to the catalyst tank of the ebullated bed first, and then sent into the ebullated bed reactor through the catalyst tank. In order to prevent air from entering the catalyst tank with the catalyst and adversely affecting the catalyst, the catalyst tank usually contains oil, which oil-seals the catalyst pipe on the catalyst tank. The catalyst added to the catalyst tank will soak and spread in the oil and gradually sink, and then in the use process, the fully soaked catalyst is added to the ebullated bed reactor through the catalyst tank for catalytic reaction.

[0030] At the same time, the oil in the catalyst tank also plays a role in screening unqualified catalyst: unqualified catalyst has a smaller density, which will float on the liquid surface for a long time and cannot sink when entering the catalyst tank. By separating the catalyst floating on the liquid surface from the catalyst tank, unqualified catalyst can be screened out, ensuring the effect of coal tar hydrogenation reaction.

[0031] However, due to the slow rate of catalyst soaking, spreading and sinking in the oil, when adding catalyst through the catalyst pipe, a large amount of catalyst will often float and accumulate on the oil in the catalyst pipe, causing the catalyst pipe to be blocked, which seriously affects the process of coal tar hydrogenation.

[0032] In the first aspect, referring to Figure 1 , a schematic diagram of an ebullated bed catalyst tank is shown, which includes a tank body 1, a catalyst pipe 2 and a telescopic nitrogen blowing pipe 3; the tank body 1 contains oil 4; the catalyst pipe 2 is arranged on the tank body 1, and the catalyst pipe 2 extends into the tank body 1 and is partially inserted into the oil 4; the telescopic nitrogen blowing pipe 3 is communicated with a nitrogen source; the telescopic nitrogen blowing pipe 3 is movably arranged above the catalyst pipe 2.

[0033] In this embodiment, the tank body 1 contains oil 4, the catalyst pipe 2 extends into the tank body and is inserted into the oil, and is oil-sealed by the oil 4; when adding catalyst to the tank body 1 through the catalyst pipe 2, if the catalyst floats and accumulates on the oil surface in the catalyst pipe 2, causing the catalyst pipe 2 to be blocked, the telescopic nitrogen blowing pipe 3 can be lengthened so that the telescopic nitrogen blowing pipe 3 is inserted into the catalyst pipe 2, and the blocked catalyst is blown into the oil 4 by nitrogen, accelerating the soaking and spreading of the catalyst, thereby eliminating the technical problem that a large amount of catalyst often floats and accumulates on the oil in the catalyst pipe 2 when adding catalyst through the catalyst pipe 2, causing the catalyst pipe 2 to be blocked, which seriously affects the process of coal tar hydrogenation.

[0034] Further, the oil 4 in the utility model can be diesel or other oil liquid known to those skilled in the art, and the embodiment only provides a preferred scheme.

[0035] Optionally, referring to Figure 2 The telescopic nitrogen blowing pipe 3 in the utility model comprises a telescopic part 31 and a blowing pipe 32; the telescopic part 31 is arranged above the additive pipe 2, the blowing pipe 32 is connected to the telescopic part 31, and the blowing pipe 32 is communicated with a nitrogen source.

[0036] In the embodiment, the telescopic part 31 is arranged above the additive pipe 2, the blowing pipe 32 is connected to the telescopic part 31, the blowing pipe 32 is communicated with the nitrogen source, and the telescopic part 31 is elongated and shortened to adjust the height of the blowing pipe 32; in use, when the catalyst is accumulated on the oil liquid surface in the additive pipe 2 to cause the additive pipe 2 to be blocked, the telescopic part 31 is elongated, the blowing pipe 32 is inserted into the additive pipe 2, the telescopic part 31 is adjusted to make the air outlet of the blowing pipe 32 close to the liquid surface of the oil liquid 4, and the blocked catalyst is swept by nitrogen, so that the blocked catalyst is blown into the oil liquid 4 under the action of nitrogen to accelerate immersion and dispersion.

[0037] Further, the blowing pipe 32 can be a copper pipe, an alloy pipe, a rubber pipe or other blowing pipe known to those skilled in the art, and the embodiment only provides a preferred implementation scheme.

[0038] Further, the telescopic part 31 in the embodiment can be a motor telescopic rod, an elastic telescopic part or other telescopic part known to those skilled in the art, and is not limited in the utility model.

[0039] Further, the nitrogen source providing nitrogen for the telescopic nitrogen blowing pipe 3 can be nitrogen with a pressure of 0.3-0.5 MPa, and it needs to be noted that, in actual use, the pressure of the nitrogen can be adjusted by those skilled in the art according to the blocking condition of the catalyst in the additive pipe 2 to effectively sweep the blocked catalyst and accelerate immersion and dispersion of the catalyst.

[0040] Optionally, referring to Figure 2 The lower end of the blowing pipe 32 in the utility model is provided with a bell mouth 33, and the outer diameter of the bell mouth 33 is the same as the inner diameter of the additive pipe 2.

[0041] In the embodiment, the lower end of the blowing pipe 32 is provided with the bell mouth 33, and the outer diameter of the bell mouth 33 is the same as the inner diameter of the additive pipe 2; when the blowing pipe 32 is inserted into the additive pipe 2, the bell mouth 33 abuts against the inner wall of the additive pipe 2, so that the nitrogen blown out is prevented from being sprayed out reversely along the gap between the additive pipe 2 and the blowing pipe 32 to cause the catalyst to be taken out of the additive pipe 2.

[0042] Optionally, the blowing branch pipe 21 is arranged on the additive pipe 2, and the blowing branch pipe 21 is communicated with the inside of the additive pipe 2.

[0043] In the embodiment, the blowing branch pipe 21 is arranged on the additive pipe 2, and when the catalyst is added into the tank body 1 through the additive pipe 2, the telescopic nitrogen blowing pipe 3 is connected with the blowing branch pipe 21, and nitrogen is blown into the additive pipe 2 through the blowing branch pipe 21 during the process of adding the catalyst, so that the immersion and dispersion process of the catalyst in the oil liquid is accelerated, and the risk of the additive pipe 2 being blocked by the catalyst is reduced.

[0044] Optionally, an included angle between the blowing branch pipe 21 and the additive pipe 2 is 30 degrees to 45 degrees, and the blowing branch pipe 21 is a plurality of blowing branch pipes 21 arranged from top to bottom.

[0045] In the embodiment, the included angle between the blowing branch pipe 21 and the additive pipe 2 is 30 degrees to 45 degrees, so that nitrogen is provided downward to accelerate the immersion and dispersion process of the catalyst, and meanwhile, the liquid level of the oil liquid 4 is increased along with the addition of the catalyst into the tank body 1, so that the telescopic nitrogen blowing pipe 3 is switched and installed on the higher blowing branch pipe 21 to blow the catalyst from above.

[0046] Further, the connection mode between the blowing branch pipe 21 and the telescopic nitrogen blowing pipe 3 can be selected as plug-in connection, threaded connection, clamping connection or other detachable connection modes known to those skilled in the art, and the utility model does not make limitation.

[0047] Optionally, the tank body 1 is further provided with a liquid level detection assembly.

[0048] In the embodiment, the liquid level detection assembly is arranged on the tank body 1, and the liquid level height of the oil liquid 4 in the tank body 1 is acquired in real time through the liquid level detection assembly, so that the liquid level of the oil liquid is monitored when the oil liquid or the catalyst is added into the tank body 1.

[0049] For example, the liquid level detection assembly can be a magnetic float liquid level meter, a static pressure liquid level meter, a capacitive liquid level meter or any other liquid level detection assembly known to those skilled in the art, and the embodiment does not make specific limitation.

[0050] Optionally, the tank body 1 is further provided with a nitrogen inlet 11, the nitrogen inlet 11 is arranged below the liquid surface of the oil liquid 4, and the nitrogen inlet 11 is communicated with a nitrogen source.

[0051] In the embodiment, the nitrogen inlet 11 is arranged on the tank body 1 and is arranged below the oil liquid level, nitrogen is continuously input into the tank body 1 from below the liquid level through the nitrogen inlet 11 after the catalyst is added into the tank body 1, the oil liquid 4 is stirred by nitrogen, the soaking rate of the catalyst in the oil liquid 4 is improved, and the catalyst after complete soaking is prevented from directly sinking to the bottom of the tank body 1 and being inconveniently transported to the ebullated bed reactor.

[0052] Optionally, the tank body 1 in the utility model is further provided with a nitrogen outlet 12, a catalyst outlet 13 and an oil liquid inlet 14; the nitrogen outlet 12 is arranged on the upper side of the tank body 1; the catalyst outlet 13 is arranged on the lower side of the tank body 1 and is communicated with the ebullated bed reactor; the nitrogen outlet 12, the oil liquid inlet 14 and the catalyst outlet 13 are communicated with the inside of the tank body 1.

[0053] In the embodiment, the nitrogen outlet 12 is arranged on the upper side of the tank body 1, nitrogen input into the tank body 1 through the telescopic nitrogen blowing pipe 3 and the nitrogen inlet 11 is discharged, so that the nitrogen is prevented from continuously accumulating in the tank body 1 to cause excessive pressure in the tank body 1 and bring safety risks; meanwhile, oil liquid 4 is input into the tank body 1 through the oil liquid inlet 14 in the use process, and the catalyst is output together with the oil liquid 4 into the ebullated bed reactor through the catalyst outlet 13 when the ebullated bed reactor needs to add catalyst after the catalyst is fully soaked.

[0054] In the second aspect, the utility model further provides an ebullated bed, the ebullated bed comprises an ebullated bed reactor, a nitrogen pump and the ebullated bed adding agent tank of any one of the above; the ebullated bed adding agent tank comprises a tank body 1, an adding agent pipe 2 and a telescopic nitrogen blowing pipe 3; the nitrogen pump is communicated with the telescopic nitrogen blowing pipe 3; the adding agent pipe is arranged on the tank body 1; the tank body 1 is communicated with the ebullated bed reactor.

[0055] In the embodiment, an ebullated bed is provided, and it should be noted that the ebullated bed adding agent tank in the embodiment is consistent with the ebullated bed adding agent tank in the above embodiments in structure and use mode, and has the same beneficial effects, which will not be repeated here. The ebullated bed provided by the utility model eliminates the technical problem that a large amount of catalyst often floats and accumulates on the oil liquid in the adding agent pipe 2 when the catalyst is added through the adding agent pipe 2 in the prior art, causing the adding agent pipe 2 to be blocked and seriously affecting the process progress of coal tar hydrogenation.

[0056] In the third aspect, the utility model further provides a coal tar hydrogenation system, and the coal tar hydrogenation system comprises the ebullated bed.

[0057] In the embodiment, a coal tar hydrogenation system is provided, which comprises the boiling bed in the above embodiment, and in the process of coal tar hydrogenation, the technical problem that a large amount of catalyst is accumulated on the oil liquid in the catalyst adding pipe 2 to cause the catalyst adding pipe 2 to be blocked and seriously affect the process of coal tar hydrogenation is avoided.

[0058] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0059] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. An ebullated bed additive tank, characterized in that The boiling bed adding agent tank comprises a tank body (1), an adding agent pipe (2) and a telescopic nitrogen blowing pipe (3); The tank body (1) contains oil liquid (4); The adding agent pipe (2) is arranged on the tank body (1) and extends into the tank body (1) and partially inserts into the oil liquid (4); The telescopic nitrogen blowing pipe (3) is communicated with a nitrogen source and movably arranged above the adding agent pipe (2).

2. The ebullated bed additive tank according to claim 1, characterized in that The telescopic nitrogen blowing pipe (3) comprises a telescopic part (31) and a blowing pipe (32); The telescopic part (31) is arranged above the adding agent pipe (2), and the blowing pipe (32) is connected to the telescopic part (31) and communicated with the nitrogen source.

3. The ebullated bed additive tank according to claim 2, characterized in that The lower end of the blowing pipe (32) is provided with a bell mouth (33) with the same outer diameter as the inner diameter of the adding agent pipe (2).

4. The ebullated bed additive tank according to claim 1, characterized in that The adding agent pipe (2) is provided with a blowing branch pipe (21) communicated with the inside of the adding agent pipe (2); The blowing branch pipe (21) is detachably connected to the telescopic nitrogen blowing pipe (3).

5. The ebullated bed additive tank according to claim 4, characterized in that The included angle between the blowing branch pipe (21) and the adding agent pipe (2) is 30-45 degrees. The blowing branch pipe (21) is provided in multiple, and the multiple blowing branch pipes (21) are sequentially arranged from top to bottom.

6. The ebullated bed additive tank according to claim 5, characterized in that The tank body (1) is further provided with a liquid level detection assembly.

7. The ebullated bed additive tank according to claim 1, characterized in that The tank body (1) is further provided with a nitrogen inlet (11) arranged below the liquid surface of the oil liquid (4) and communicated with the nitrogen source.

8. The ebullated bed additive tank according to claim 7, characterized in that The tank body (1) is further provided with a nitrogen outlet (12), a catalyst outlet (13) and an oil liquid inlet (14); the nitrogen outlet (12) is arranged on the upper side of the tank body (1); the catalyst outlet (13) is arranged on the lower side of the tank body (1) and communicated with the boiling bed reactor; The nitrogen outlet (12), the oil liquid inlet (14) and the catalyst outlet (13) are communicated with the inside of the tank body (1).

9. A fluidized bed, characterized in that The boiling bed comprises a boiling bed reactor, a nitrogen pump and the boiling bed adding agent tank according to any one of claims 1-8; The boiling bed adding agent tank comprises a tank body (1), an adding agent pipe (2) and a telescopic nitrogen blowing pipe (3); The nitrogen pump is communicated with the telescopic nitrogen blowing pipe (3); The adding agent pipe (2) is arranged on the tank body (1); The tank body (1) is communicated with the boiling bed reactor.

10. A coal tar hydroprocessing system characterized by, The coal tar hydrogenation system comprises the boiling bed according to claim 9.

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