Regeneration dust removal system applied to large-scale continuous reforming
By adding a pressure-stabilizing control valve and a multi-loop air compressor to the large-scale continuous reforming and regeneration dust removal system, and by connecting parallel pipelines, the process of lifting the catalyst and dust was optimized. This solved the problem of excessive differential pressure in the dust removal system, achieved system stability and smooth catalyst lifting, and ensured the long-term safe operation of the unit.
Patent Information
- Application Number
- CN202422106429.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-29
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-08-29
AI Technical Summary
Excessive differential pressure in the dust removal system of the regeneration unit of a large continuous reforming plant leads to poor dust removal efficiency, which in turn clogs the internal components of the reactor and affects the safe and stable operation of the plant.
By adding a pressure-stabilizing control valve to the outlet pipeline of the dust collector, setting up multiple air compressors to form a closed loop, connecting pipelines in parallel, and combining automatic exhaust valves and shut-off valves, the process of lifting catalyst and dust is optimized, ensuring stable system pressure and smooth catalyst circulation.
This achieves long-term stable operation of the dust removal system, reduces manual operation, avoids abnormal filter pressure differences and filter element damage, and maintains long-term stable operation of the device.
Smart Images
Figure CN223454269U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to dust removal system technical field, concretely relates to a kind of application in large-scale continuous reform regeneration dust removal system. BACKGROUND
[0002] Zhejiang Petrochemical 3.8 million tons / year continuous reform unit is the largest single set scale in domestic continuous reform, since December 2019, the differential pressure of regeneration dust collector rises fast, which limits the continuous safe and stable operation of regeneration system, and the poor dust removal effect caused by the high differential pressure of dust removal system will cause the reactor internals to be blocked, and the whole device will be shut down.
[0003] At present, due to the high differential pressure of the dust removal system, the effect of elutriating dust cannot be achieved, which leads to the need to reduce the load to clean the filter core, therefore, in order to fundamentally solve the problem of long-period operation of the regeneration unit dust removal system, the reason for the rapid rise of the differential pressure of the dust removal system needs to be analyzed, and the process operation and technical transformation are optimized to reduce the carbon deposition of the catalyst and the excessive dust generated in the process, so as to realize the goal of long-period operation of the regeneration unit dust removal system. UTILITY MODEL CONTENT
[0004] The utility model is proposed in view of the above problems existing in the prior art, and a large-scale continuous reform regeneration dust removal system capable of improving dust removal effect is provided.
[0005] The utility model can be realized by the following technical schemes:
[0006] A large-scale continuous reform regeneration dust removal system, comprising:
[0007] A dust collector, an air compressor and a catalyst collection tank are connected by pipelines and form a closed loop;
[0008] A regenerator is connected between the catalyst collection tank by a pipeline, and the regenerator is used to input catalyst into the catalyst collection tank;
[0009] A backflush solenoid valve is connected between the dust collector by a pipeline, and nitrogen enters the dust collector after opening, and the dust generated by the impact of compressed air on the catalyst is sent into the dust collector along the pipeline in sequence through the air compressor and the catalyst collection tank;
[0010] A pressure stabilizing control valve is arranged at the outlet pipeline of the dust collector, and automatically releases pressure when the backflush pressure is too high to maintain stable system pressure.
[0011] As a further improvement of the utility model, the number of air compressors can be provided with multiple, the import and export of each air compressor are connected with the dust collector, the catalyst collection tank through pipeline to form multiple closed loop circuit, wherein,
[0012] When the number of air compressors is provided with two and is first air compressor and second air compressor respectively, the dust collector, the first air compressor, the catalyst collection tank form first closed loop circuit, the dust collector, the second air compressor, the catalyst collection tank form second closed loop circuit.
[0013] As a further improvement of the utility model, the second air compressor is equipped with first parallel pipeline between the first closed loop circuit, the compressed air generated by the second air compressor is blown along the second closed loop circuit to the catalyst collection tank, and part of the compressed air flows into the first closed loop circuit through the first parallel pipeline and enters the catalyst collection tank.
[0014] As a further improvement of the utility model, the catalyst output by the regenerator flows into the catalyst collection tank along the second closed loop circuit under the action of the compressed air generated by the second air compressor, and part of the catalyst can enter the first closed loop circuit through the first parallel pipeline and flow into the catalyst collection tank along the first closed loop circuit under the action of the compressed air generated by the first air compressor.
[0015] As a further improvement of the utility model, the second closed loop circuit is further equipped with second parallel pipeline between the outlet pipeline of the regenerator, the compressed air generated by the second air compressor is blown along the second closed loop circuit to the catalyst collection tank, and part of the compressed air flows into the outlet pipeline of the regenerator along the second parallel pipeline and lifts the catalyst along the second closed loop circuit to the catalyst collection tank.
[0016] As a further improvement of the utility model, the dust collector is provided with automatic exhaust valve on the exhaust pipeline, and the automatic exhaust valve is communicated with the atmosphere through the silencer.
[0017] As a further improvement of the utility model, the dust collector is further provided with control valve on the exhaust pipeline, when the back-blowing electromagnetic valve is electrified and opened, the control system controls the control valve to open to the preset opening degree and automatically closes after maintaining a certain time.
[0018] As a further improvement of the utility model, the bottom of the catalyst collecting tank is connected with a catalyst recovery cylinder through a pipeline, and a first cut-off valve is arranged on the pipeline between the two, after the first cut-off valve is opened, the catalyst at the bottom of the catalyst collecting tank falls into the catalyst recovery cylinder.
[0019] As a further improvement of the utility model, the bottom of the dust collector is also connected with a second dust collecting tank through a pipeline, and a second cut-off valve is arranged on the pipeline between the two, wherein,
[0020] When the pressure in the dust collector is the same as the pressure in the second dust collecting tank, the control system controls the second cut-off valve to be automatically opened, and the dust deposited at the bottom of the dust collector falls into the second dust collecting tank.
[0021] As a further improvement of the utility model, the bottom of the second dust collecting tank is also connected with a dust recovery cylinder through a pipeline, and the second dust collecting tank is also provided with an exhaust pipeline which is communicated with the atmosphere.
[0022] Compared with the prior art, the utility model has the following beneficial effects:
[0023] 1. A pressure stabilizing control valve is additionally arranged on the outlet pipeline of the dust collector, which can timely release pressure when the back blowing pressure is too high to maintain the system pressure stable, thereby avoiding the fluctuation of the pressure difference caused by back blowing to cause the fluctuation of the catalyst circulation amount, and further ensuring that the catalyst lifting speed can be kept stable.
[0024] 2. The second closed loop is communicated with the first closed loop through the first parallel pipeline, the compressed air and the catalyst in the second closed loop can be supplemented into the first closed loop, ensuring that the catalyst can be smoothly lifted, and the pressure between the two closed loops can be balanced, and the setting of the pressure stabilizing control valve ensures the stability of the system.
[0025] 3. The compressed air generated by the second air compressor blows towards the catalyst collecting tank along the second closed loop, and part of the compressed air flows into the outlet pipeline of the regenerator along the second parallel pipeline, and the catalyst is lifted to the catalyst collecting tank along the second closed loop, and the second parallel pipeline is arranged to enable the compressed air generated by the second air compressor to be branched to the outlet pipeline of the regenerator, thereby helping the lifting of the catalyst, further optimizing the lifting linear velocity of the catalyst, and ensuring the smoothness of the catalyst lifting process.
[0026] 4. An automatic exhaust valve is arranged on the exhaust pipeline of the dust collector, and the automatic exhaust valve is communicated with the atmosphere through a silencer, which can exhaust excess gas, thereby avoiding the over-high pressure in the dust collector, and stabilizing the lifting pressure difference.
[0027] 5. A control valve is also provided on the external discharge pipe of the dust collector. When the backflush solenoid valve is energized and opened, the control system controls the control valve to open to a preset opening (this opening has an input function) and maintains it for a specific period of time (this time has an input function) and then immediately closes to the "0" position to ensure the stability of the backflush process;
[0028] 6. The dust removal system provided in this application can greatly reduce manual operations, achieve long-term stable operation of the filter, avoid abnormal filter pressure difference and filter element damage caused by gas accumulation inside the filter, and maintain long-term stable operation of the device. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] Fig. 1 This is a process flow chart of the application of the utility model in a large-scale continuous reforming regeneration dust removal system;
[0030] Fig. 2 It is a structural schematic diagram of the dust collector of the present utility model.
[0031] In the figure, 100, dust collector; 101, back-blowing solenoid valve; 102, pressure-stabilizing control valve; 103, automatic exhaust valve; 110, catalyst collection tank; 111, buffer elbow; 120, regenerator; 130, first air compressor; 140, second air compressor; 150, first parallel pipeline; 160, second parallel pipeline; 170, catalyst recovery cylinder; 180, second dust collection tank; 181, second shut-off valve; 190, dust recovery cylinder. DETAILED DESCRIPTION
[0032] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical method of the present invention, but the present invention is not limited to these embodiments.
[0033] like Figs. 1-2 As shown, the utility model provides a large-scale continuous reforming regeneration dust removal system, including:
[0034] The dust collector 100, the air compressor, and the catalyst collection tank 110 are connected through pipelines to form a closed loop;
[0035] The regenerator 120 is connected to the catalyst collecting tank 110 via a pipeline, and the regenerator 120 is used to input the catalyst into the catalyst collecting tank 110;
[0036] The backflush solenoid valve 101 is connected to the dust collector 100 via a pipeline. When it is opened, nitrogen enters the dust collector 100 and passes through the air compressor and the catalyst collection tank 110 in sequence along the pipeline. The dust generated by the catalyst due to the impact of the compressed air is sent into the dust collector 100, and the entire system is dusted by the nitrogen backflush.
[0037] A pressure stabilizing control valve 102 is arranged at the outlet pipeline of the dust collector 100 to automatically release pressure when the back flushing pressure is too high to maintain the system pressure stable.
[0038] It is to be noted that the back flushing of the dust collector 100 will cause the system pressure to rise, resulting in poor lifting of the catalyst. However, the arrangement of the pressure stabilizing control valve 102 at the outlet pipeline of the dust collector 100 can timely release pressure when the back flushing pressure is too high to maintain the system pressure stable, thereby avoiding the fluctuation of the pressure difference caused by the back flushing to cause the fluctuation of the catalyst circulation amount, and further ensuring that the catalyst lifting speed can be kept stable.
[0039] Preferably, the number of air compressors can be set to multiple, and the inlets and outlets of each air compressor are connected to the dust collector 100 and the catalyst collection tank 110 through pipelines to form multiple closed loops, wherein,
[0040] As an example in the embodiment, when the number of air compressors is set to two and are respectively the first air compressor 130 and the second air compressor 140, the dust collector 100, the first air compressor 130, and the catalyst collection tank 110 form a first closed loop, and the dust collector 100, the second air compressor 140, and the catalyst collection tank 110 form a second closed loop.
[0041] Further, the first parallel pipeline 150 is arranged between the second air compressor 140 and the first closed loop, and part of the compressed air generated by the second air compressor 140 flows into the first closed loop through the first parallel pipeline 150 and enters the catalyst collection tank 110 while the compressed air generated by the second air compressor 140 flows along the second closed loop to the catalyst collection tank 110.
[0042] Meanwhile, part of the catalyst output by the regenerator 120 can enter the first closed loop through the first parallel pipeline 150 and flow into the catalyst collection tank 110 along the first closed loop under the action of the compressed air generated by the first air compressor 130 while the catalyst output by the regenerator 120 flows into the catalyst collection tank 110 along the second closed loop under the action of the compressed air generated by the second air compressor 140.
[0043] The arrangement of the first parallel pipeline 150 enables the compressed air and catalyst in the second closed loop to be supplemented into the first closed loop, ensuring that the catalyst can be smoothly lifted, and also balancing the pressure between the two closed loops, cooperating with the arrangement of the pressure stabilizing control valve 102 to ensure the stability of the system.
[0044] Preferably, a second parallel pipeline 160 is further provided between the second closed loop and the outlet pipeline of the regenerator 120, and part of the compressed air generated by the second air compressor 140 flows into the outlet pipeline of the regenerator 120 along the second parallel pipeline 160 while the rest of the compressed air blows the catalyst along the second closed loop to the catalyst collection tank 110, thereby lifting the catalyst along the second closed loop to the catalyst collection tank 110.
[0045] The second parallel pipeline 160 is provided to enable the compressed air generated by the second air compressor 140 to be divided into two parts, one part flowing into the outlet pipeline of the regenerator 120, thereby helping to lift the catalyst and further optimizing the lifting linear velocity of the catalyst to ensure the smoothness of the catalyst lifting process.
[0046] In addition, a buffer elbow 111 is provided at the top of the catalyst collection tank 110, and the catalyst enters the catalyst collection tank 110 from the buffer elbow 111, while the dust generated by the impact of the compressed air when the catalyst enters is transported from the buffer elbow 111 to the dust collector 100, and the buffer elbow 111 functions to slow down the speed of the granular catalyst entering the catalyst collection tank 110 to ensure the integrity of the catalyst.
[0047] Preferably, an automatic exhaust valve 103 is provided on the exhaust pipeline of the dust collector 100, and the automatic exhaust valve 103 is connected to the atmosphere through a silencer to discharge excess gas and avoid excessive internal pressure in the dust collector 100, thereby stabilizing the lifting pressure difference.
[0048] In addition, a control valve (not shown in the figure) is further provided on the exhaust pipeline of the dust collector 100, and when the backflush solenoid valve 101 is powered on, the control system controls the control valve to open to a preset opening degree (which has an input function) and maintain for a certain period of time (which has an input function) and then immediately close to "0" position, thereby ensuring the stability of the backflush process.
[0049] Preferably, a catalyst recovery cylinder 170 is connected to the bottom of the catalyst collection tank 110 through a pipeline, and a first shut-off valve is provided on the pipeline between the two, and when the first shut-off valve is opened, the catalyst at the bottom of the catalyst collection tank 110 falls into the catalyst recovery cylinder 170 for collection.
[0050] Preferably, a second dust collection tank 180 is further connected to the bottom of the dust collector 100 through a pipeline, and a second shut-off valve 181 is provided on the pipeline between the two, wherein,
[0051] When the pressure in the dust collector 100 is the same as the pressure in the second dust collection tank 180, the control system controls the second cut-off valve 181 to automatically open, and the dust deposited at the bottom of the dust collector 100 automatically falls into the second dust collection tank 180, which can automatically take out the dust deposited in the second dust collection tank 180.
[0052] Preferably, the bottom of the second dust collection tank 180 is also connected with a dust recovery cylinder 190 through a pipeline, which is used to collect the dust discharged from the bottom of the second dust collection tank 180, and in addition, the second dust collection tank 180 also has an exhaust pipeline in communication with the atmosphere, which is used to discharge excess gas to prevent the internal pressure of the second dust collection tank 180 from being too high.
[0053] In summary, the dust removal system provided by the embodiment can greatly reduce manual operation, realize long-term stable operation of the filter, avoid filter pressure difference abnormalities and filter damage caused by gas accumulation in the filter, and maintain long-term stable operation of the device.
[0054] The technical means disclosed in the technical scheme of the utility model is not limited to the technical means disclosed in the above technical means, and also includes technical solutions composed of any combination of the above technical features. The above is the specific implementation of the utility model, and it should be pointed out that for ordinary technical personnel in the technical field, without departing from the principle of the utility model, some improvements and refinements can be made, and these improvements and refinements are also considered as the protection scope of the utility model.
[0055] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only used to explain the relative position relationship, movement condition, etc. between the components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.
[0056] In addition, in the utility model, the description such as "first", "second", "one" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.
[0057] In the utility model, unless another definite provision and limitation, the term "connect", "fix" and so on should do the broad sense understanding, for example, "fix" can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electric connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two element inside's intercommunication or two element's mutual action relation, unless another definite limitation.For the ordinary skill in the art, the specific meaning of the above-mentioned term in the utility model can be understood according to the specific circumstances.
[0058] In addition, the technical solutions of various embodiments of the present application can be combined with each other, but must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, also not within the scope of protection required by the present application.
Claims
1. A large-scale continuous reforming dust removal system, characterized in that, The application relates to a dust collector, an air compressor, a catalyst collecting tank, a regenerator, a back flushing solenoid valve and a pressure stabilizing control valve. The dust collector, the air compressor and the catalyst collecting tank are connected through pipelines and form a closed loop circuit. The regenerator is connected with the catalyst collecting tank through a pipeline, and the regenerator is used for inputting catalyst into the catalyst collecting tank. The back flushing solenoid valve is connected with the dust collector through a pipeline, and nitrogen enters the dust collector after the back flushing solenoid valve is opened. The pressure stabilizing control valve is arranged at an outlet pipeline of the dust collector, and the pressure stabilizing control valve is used for automatically releasing pressure when the back flushing pressure is too high so as to maintain the stability of the system pressure.
2. The application of a large-scale continuous reforming and regenerative dust removal system according to claim 1, characterized in that, The number of the air compressors can be multiple, and the inlets and outlets of the air compressors are connected with the dust collector and the catalyst collecting tank through pipelines so as to form multiple closed loop circuits. When the number of the air compressors is two and the air compressors are respectively a first air compressor and a second air compressor, the dust collector, the first air compressor and the catalyst collecting tank form a first closed loop circuit, and the dust collector, the second air compressor and the catalyst collecting tank form a second closed loop circuit.
3. The application of a large-scale continuous reforming and regenerative dust removal system according to claim 2, characterized in that, The second air compressor is provided with a first parallel pipeline with the first closed loop circuit, and part of the compressed air generated by the second air compressor flows into the first closed loop circuit through the first parallel pipeline and enters the catalyst collecting tank.
4. The application of a large-scale continuous reforming and regenerative dust removal system according to claim 3, characterized in that, The catalyst output by the regenerator flows into the catalyst collecting tank along the second closed loop circuit under the action of the compressed air generated by the second air compressor, and part of the catalyst can enter the first closed loop circuit through the first parallel pipeline and flow into the catalyst collecting tank along the first closed loop circuit under the action of the compressed air generated by the first air compressor.
5. The application of a large-scale continuous reforming and regenerative dust removal system according to claim 2, characterized in that, The second closed loop circuit is further provided with a second parallel pipeline with the outlet pipeline of the regenerator, and part of the compressed air generated by the second air compressor flows into the outlet pipeline of the regenerator along the second parallel pipeline and lifts the catalyst along the second closed loop circuit to the catalyst collecting tank.
6. The application of a large-scale continuous reforming and regenerative dust removal system according to claim 1, characterized in that, An automatic exhaust valve is arranged on the exhaust pipeline of the dust collector, and the automatic exhaust valve is connected with the atmosphere through a silencer.
7. The application of a large-scale continuous reforming and regenerative dust removal system according to claim 1, characterized in that, A control valve is further arranged on the exhaust pipeline of the dust collector, and the control valve is opened to a preset opening degree and is automatically closed after a specific time when the back flushing solenoid valve is powered on and opened.
8. The application of a large-scale continuous reforming and regenerative dust removal system according to claim 1, characterized in that, The bottom of the catalyst collecting tank is connected with a catalyst collecting tank through a pipeline, and a first cut-off valve is arranged on the pipeline between the catalyst collecting tank and the catalyst collecting tank. When the first cut-off valve is opened, the catalyst at the bottom of the catalyst collecting tank falls into the catalyst collecting tank.
9. The application of a large-scale continuous reforming and regenerative dust removal system according to claim 1, characterized in that, The bottom of the dust collector is also connected with a second dust collecting tank through a pipeline, and a second cut-off valve is arranged on the pipeline between the two. When the pressure in the dust collector is equal to the pressure in the second dust collecting tank, the control system controls the second cut-off valve to be automatically opened, and the dust deposited on the bottom of the dust collector falls into the second dust collecting tank.
10. The application of a large-scale continuous reforming and regenerative dust removal system according to claim 9, characterized in that, The bottom of the second dust collecting tank is also connected with a dust recycling cylinder through a pipeline, and the second dust collecting tank also has an exhaust pipeline in communication with the atmosphere.