Online catalyst recycling device based on continuous hydrogenation reaction system

Abstract

The utility model discloses an online catalyst recycling device based on a continuous hydrogenation reaction system, which comprises a first reaction kettle, a second reaction kettle, a third reaction kettle, a circulating pump, a first pipe body, a second pipe body, a third pipe body, a fourth pipe body, a fifth pipe body, an output pipe body and a discharge pipe body. According to the utility model, the catalyst in the third reaction kettle can be conveyed back to the first reaction kettle and the second reaction kettle through the circulating pump for recycling, so that the problem that the catalyst is lost out of the system along with materials in the continuous hydrogenation reaction process to cause large catalyst dosage is solved; and the catalyst in the third reaction kettle can be discharged through the discharge pipe body, so that the deactivated catalyst is prevented from staying in the reaction system for a long time, the time required by post-treatment is shortened, the catalyst dosage and the process reaction energy consumption are greatly reduced, the product quality is improved, and the production efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of continuous hydrogenation reaction, in particular to an online catalyst recycling device based on a continuous hydrogenation reaction system. Background Art

[0002] In the traditional continuous hydrogenation reaction process, the method for treating the catalyst is that the material after a series of reactions enters the discharge control tank, and then a part of the material is put into the subsequent process treatment, and the catalyst is reused only after the catalyst sedimentation is completed.

[0003] However, after the material reaction is completed, this process needs to go through multiple processes before the catalyst can be reused. During this process, the temperature of the reaction system will be lowered when the catalyst is reused, resulting in a large temperature loss of the material, which will increase the energy consumption in the reaction process. At the same time, the drop in reaction temperature when the catalyst is reused will also affect product quality. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides an online catalyst recycling device based on a continuous hydrogenation reaction system, which can solve the above technical problems.

[0006] (II) Technical solution

[0007] To solve the above technical problems, the utility model provides the following technical solutions: a catalyst online recycling device based on a continuous hydrogenation reaction system, comprising a first reactor, a second reactor, a third reactor and a circulation pump, wherein the first reactor is provided with a first stirrer, and the second reactor is provided with a second stirrer, characterized in that it also includes: a first pipe body, one end of which is connected to the first input port of the first reactor, wherein the first pipe body is provided with a first switch valve for controlling the on-off of the first pipe body; a second pipe body, one end of which is connected to the output port of the first reactor, and the other end is connected to the first input port of the second reactor, wherein the second pipe body is provided with a second switch valve for controlling the on-off of the second pipe body; a third pipe body, one end of which is connected to the output port of the second reactor, and the other end is connected to the input port of the third reactor, wherein the third pipe body is provided with a third switch valve for controlling the on-off of the third pipe body; a fourth pipe body, one end of which is connected to the first input port of the first reactor, and the other end is connected to the first input port of the second reactor, wherein the third pipe body is provided with a third switch valve for controlling the on-off of the third pipe body; The first output port of the third reactor is connected, and the other end is connected to the input port of the circulation pump, wherein the fourth tube body is provided with a fourth switch valve for controlling the on-off of the fourth tube body; the fifth tube body, one end of which is connected to the output port of the circulation pump, and the other end is connected to the second input port of the first reactor through the first branch tube body, wherein the other end of the fifth tube body is also connected to the second input port of the second reactor through the second branch tube body, and the first branch tube body is provided with a fifth switch valve for controlling the on-off of the first branch tube body, and the second branch tube body is provided with a sixth switch valve for controlling the on-off of the second branch tube body; an output tube body, one end of which is connected to the second output port of the third reactor, wherein the output tube body is provided with a seventh switch valve for controlling the on-off of the output tube body; an outer tube body, one end of which is connected to the other end of the fifth tube body, wherein the outer tube body is provided with an eighth switch valve for controlling the on-off of the outer tube body.

[0008] Furthermore, it also includes: a gas phase balance pipeline, one end of which is connected to the gas phase port at the top of the first reactor through a first gas phase pipe body, the middle of which is connected to the gas phase port at the top of the second reactor through a second gas phase pipe body, and the other end of which is connected to the gas phase port at the top of the third reactor through a third gas phase pipe body, wherein the first gas phase pipe body is provided with a first gas phase regulating valve for controlling the on and off of the first gas phase pipe body, the second gas phase pipe body is provided with a second gas phase regulating valve for controlling the on and off of the second gas phase pipe body, and the third gas phase pipe body is provided with a third gas phase regulating valve for controlling the on and off of the third gas phase pipe body.

[0009] Furthermore, the bottom end of the inner cavity of the third reaction kettle is in a cone shape, wherein a transparent area is provided at the bottom end of the third reaction kettle.

[0010] Furthermore, a scale is provided in the transparent area.

[0011] (III) Beneficial effects

[0012] Compared with the prior art, the utility model provides an online catalyst recycling device based on a continuous hydrogenation reaction system, which has the following beneficial effects: the online catalyst recycling device based on a continuous hydrogenation reaction system disclosed by the utility model solves the problem of large catalyst usage caused by the catalyst being lost to the outside of the system along with the material during the continuous hydrogenation reaction, and also avoids the deactivated catalyst from being retained in the reaction system for a long time, reducing the time required for post-treatment, and at the same time being able to control the concentration of the catalyst in the reaction system, and can better control the amount of catalyst used, and also greatly reduces the catalyst usage and process reaction energy consumption, improves product quality, and greatly improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic structural diagram of an online catalyst recycling device based on a continuous hydrogenation reaction system of the utility model;

[0014] Figure 2 for Figure 1 Schematic diagram of the structure of the third reactor. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] like Figure 1 As shown, the catalyst online recycling device based on the continuous hydrogenation reaction system disclosed in the utility model includes a first reactor 11, a second reactor 12, a third reactor 13, a circulation pump 14, a first pipe body 15, a second pipe body 16, a third pipe body 17, a fourth pipe body 18, a fifth pipe body 19, an output pipe body 20 and an external discharge pipe body 21.

[0017] In this embodiment, the first reaction kettle 11 is provided with a first stirrer 111 , and the second reaction kettle 12 is provided with a second stirrer 121 .

[0018] It should be understood that the first reactor 11, the second reactor 12, the third reactor 13 and the circulation pump 14 of this embodiment can be implemented by products in the prior art, and their principles and structures are not described one by one here.

[0019] One end of the first tube 15 is connected to the first input port of the first reactor 11 for inputting hydrogen into the first reactor 11 .

[0020] Preferably, a first switch valve 151 for controlling the on-off of the first tube body 15 is disposed in the first tube body 15 .

[0021] One end of the second tube 16 is connected to the output port of the first reactor 11, and the other end of the second tube 16 is connected to the first input port of the second reactor 16, so that the material in the first reactor 11 can be transported to the second reactor 12 through the second tube 16. It should be understood that the catalyst will be suspended in the material under the stirring action of the first stirrer 111 in the first reactor 11, and will flow into the second reactor 12 together with the material.

[0022] Preferably, a second switch valve 161 for controlling the on-off of the second tube body 16 is disposed in the second tube body 16 .

[0023] One end of the third tube 17 is connected to the output port of the second reactor 12, and the other end of the third tube 17 is connected to the input port of the third reactor 13, so that the material in the second reactor 12 can be transported to the third reactor 13 through the third tube 17. It should be understood that the catalyst will be suspended in the material under the stirring action of the second stirrer 121 in the second reactor 12, and will flow into the third reactor 13 together with the material.

[0024] Preferably, a third switch valve 171 for controlling the on-off of the third tube body 17 is provided in the third tube body 17 .

[0025] One end of the fourth tube body 18 is connected to the first output port of the third reaction kettle 13 , and the other end of the fourth tube body 18 is connected to the input port of the circulation pump 14 .

[0026] Preferably, a fourth switch valve 181 for controlling the on-off of the fourth tube body 18 is provided in the fourth tube body 18 .

[0027] It should be understood that when the material overflows into the third reactor 13 , the catalyst begins to settle. Since the large particles of catalyst that are not completely deactivated have a larger mass, the settling speed will be faster. When the amount of catalyst settled at the bottom of the cone of the third reactor 13 reaches a certain amount, it can be pumped out by the circulation pump 14 .

[0028] One end of the fifth tube body 19 is connected to the output port of the circulation pump 14, and the other end of the fifth tube body 19 is connected to the second input port of the first reactor 11 through the first branch tube body 22, so that the material carrying the catalyst in the third reactor 13 can be pumped back to the first reactor 11 through the circulation pump 14 to reuse the catalyst in the material, thereby solving the problem of the catalyst being lost outside the system along with the material.

[0029] Furthermore, the other end of the fifth tube body 19 is also connected to the second input port of the second reactor 12 through the second branch tube body 23, so that the material carrying the catalyst in the third reactor 13 can be pumped back into the second reactor 12 through the circulation pump 14 to reuse the catalyst in the material, thereby solving the problem of the catalyst being lost outside the system along with the material.

[0030] Preferably, a fifth switch valve 221 for controlling the on / off of the first branch pipe body 22 is provided in the first branch pipe body 22, and a sixth switch valve 231 for controlling the on / off of the second branch pipe body 23 is provided in the second branch pipe body 23, so that the conduction of the fifth switch valve 221 and the sixth switch valve 231 can be controlled as needed to selectively control whether the material is transported to the first reactor 11 or the second reactor 12.

[0031] One end of the output tube body 20 is connected to the second output port of the third reaction kettle 13 , so that the material in the third reaction kettle 13 can be output through the output tube body 20 for subsequent process treatment.

[0032] Preferably, a seventh switch valve 201 for controlling the on-off of the output pipe body 20 is provided in the output pipe body 20 .

[0033] One end of the outer tube body 21 is connected to the other end of the fifth tube body 19 , so that the catalyst in the third reaction kettle 12 can be discharged through the outer tube body 21 .

[0034] Preferably, an eighth switch valve 211 for controlling the on-off of the outer tube body 21 is provided in the outer tube body 21 .

[0035] Further, such as Figure 2 As shown, the bottom end of the inner cavity of the third reactor 13 is conical, wherein a transparent area 131 is provided at the bottom end of the third reactor 13, so that the accumulation of the catalyst at the bottom of the third reactor 13 can be checked through the transparent area 131, that is, when there is too much accumulation, the circulation pump 14 can be controlled to pump the catalyst in the third reactor 13 to the first reactor 11 and / or the second reactor 12, or to be discharged through the external discharge pipe 21.

[0036] Preferably, a scale 132 is provided in the transparent area 131 , and the amount of catalyst accumulation can be measured (and viewed by naked eyes) through the scale 132 .

[0037] Furthermore, the catalyst online recycling device based on the continuous hydrogenation reaction system also includes a gas phase balance pipeline 24, wherein one end of the gas phase balance pipeline 24 is connected to the gas phase port at the top of the first reactor 11 through the first gas phase pipe body 241, the middle part of the gas phase balance pipeline 24 is connected to the gas phase port at the top of the second reactor 12 through the second gas phase pipe body 242, and the other end of the gas phase balance pipeline 24 is connected to the gas phase port at the top of the third reactor 13 through the third gas phase pipe body 243. It should be understood that the gas phase balance pipeline 24 is mainly set to keep the gas phase (i.e., pressure) in the first reactor 11, the second reactor 12, and the third reactor 13 the same.

[0038] Preferably, the first gas phase tube body 241 is provided with a first gas phase regulating valve 2411 for controlling the on and off of the first gas phase tube body 241, the second gas phase tube body 242 is provided with a second gas phase regulating valve 2421 for controlling the on and off of the second gas phase tube body 242, and the third gas phase tube body 243 is provided with a third gas phase regulating valve 2431 for controlling the on and off of the third gas phase tube body 243.

[0039] Specific working principle:

[0040] Hydrogen is continuously transported to the first reactor 11 through the first pipe body 15, and the materials react in the first reactor 11 and the second reactor 12. As the reaction proceeds, the reaction system continues to feed, and the catalyst will be suspended in the materials under the action of the first mixer 111 and the second mixer 12, and will overflow with the materials. After overflowing to the third reactor 13, the catalyst begins to settle. Since the large particles of the catalyst that are not completely deactivated have a large mass, the sedimentation rate will be faster. When the catalyst settled at the cone bottom of the third reactor 13 reaches a certain amount, by controlling the fourth switch valve 181 to open and controlling the circulation pump 14 to work, the catalyst enters the first branch pipe body 22 and the second branch pipe body 23 along with part of the materials through the pumping of the circulation pump 14, and then re-enters the reaction system. At the same time, when the catalyst concentration of the system is too high, the eighth switch valve 211 can be opened to discharge the catalyst in the third reactor 12 through the external discharge pipe body 21, so as to achieve the purpose of controlling the catalyst concentration in the reaction system.

[0041] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A catalyst online recycling device based on a continuous hydrogenation reaction system, comprising a first reactor, a second reactor, a third reactor and a circulation pump, wherein the first reactor is provided with a first stirrer, and the second reactor is provided with a second stirrer, characterized in that: Also includes: A first tube body, one end of which is connected to the first input port of the first reactor, wherein the first tube body is provided with a first switch valve for controlling the on and off of the first tube body; A second tube body, one end of which is connected to the output port of the first reactor, and the other end of which is connected to the first input port of the second reactor, wherein a second switch valve for controlling the on-off of the second tube body is provided in the second tube body; a third tube body, one end of which is connected to the output port of the second reactor, and the other end of which is connected to the input port of the third reactor, wherein the third tube body is provided with a third switch valve for controlling the on-off of the third tube body; a fourth tube body, one end of which is connected to the first output port of the third reactor, and the other end of which is connected to the input port of the circulation pump, wherein a fourth switch valve for controlling the on-off of the fourth tube body is provided in the fourth tube body; a fifth pipe body, one end of which is connected to the output port of the circulation pump, and the other end of which is connected to the second input port of the first reactor through a first branch pipe body, wherein the other end of the fifth pipe body is also connected to the second input port of the second reactor through a second branch pipe body, and a fifth switch valve for controlling the on-off of the first branch pipe body is provided in the first branch pipe body, and a sixth switch valve for controlling the on-off of the second branch pipe body is provided in the second branch pipe body; an output pipe body, one end of which is connected to the second output port of the third reaction kettle, wherein the output pipe body is provided with a seventh switch valve for controlling the on-off of the output pipe body; One end of the outer tube body is connected to the other end of the fifth tube body, wherein the outer tube body is provided with an eighth switch valve for controlling the on-off of the outer tube body.

2. The online catalyst recycling device based on the continuous hydrogenation reaction system according to claim 1, characterized in that: Also includes: A gas phase balance pipeline, one end of which is connected to the gas phase port at the top of the first reactor through a first gas phase pipe body, the middle part of which is connected to the gas phase port at the top of the second reactor through a second gas phase pipe body, and the other end of which is connected to the gas phase port at the top of the third reactor through a third gas phase pipe body, wherein the first gas phase pipe body is provided with a first gas phase regulating valve for controlling the on and off of the first gas phase pipe body, the second gas phase pipe body is provided with a second gas phase regulating valve for controlling the on and off of the second gas phase pipe body, and the third gas phase pipe body is provided with a third gas phase regulating valve for controlling the on and off of the third gas phase pipe body.

3. The catalyst online recycling device based on the continuous hydrogenation reaction system according to claim 2 is characterized in that: The bottom end of the inner cavity of the third reaction kettle is in a cone shape, wherein a transparent area is provided at the bottom end of the third reaction kettle.

4. The catalyst online recycling device based on the continuous hydrogenation reaction system according to claim 3 is characterized in that: The transparent area is provided with scales.

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