CN106586570A - System and method for discharging dust in hydrogen-containing medium state environment - Google Patents
System and method for discharging dust in hydrogen-containing medium state environment Download PDFInfo
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- CN106586570A CN106586570A CN201510661815.9A CN201510661815A CN106586570A CN 106586570 A CN106586570 A CN 106586570A CN 201510661815 A CN201510661815 A CN 201510661815A CN 106586570 A CN106586570 A CN 106586570A
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- dust
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Abstract
The invention relates to the field of oil refining production, and discloses a system for discharging dust in the hydrogen-containing medium state environment. The system comprises a dust collector (1). The system further comprises a nitrogen feeding device (2), a dust buffer tank (3) and a controller. The dust buffer tank (3) is connected with the dust collector (1) and the nitrogen feeding device (2). The controller is used for controlling the nitrogen feeding device (2) to supply nitrogen to the dust buffer tank (3), controlling the dust buffer tank (3) to exhaust gas as so to replace the gas in the dust buffer tank (3) and further controlling the dust collector (1) to discharge dust to the dust buffer tank (3). By means of the system for discharging the dust in the hydrogen-containing medium state environment, the dust can be discharged without stopping the dust collector, field operation risks are lowered, elutriation gas flow fluctuation is reduced, stable control over the pressure of a catalyst regeneration system is enhanced, and labor intensity is relieved.
Description
Technical field
The present invention relates to production is refined oil, in particular it relates to a kind of face the system and that dust is unloaded under hydrogen environment
Plant and face the method that dust is unloaded under hydrogen environment.
Background technology
Continuous reformer is modern refineries agent set, mainly for the production of high grade clean gasoline and
Industrial chemicals, continuous reformer as modern aromatics production faucet device, each main oil plant at home
There is construction；Continuous reforming process is uninterruptedly lifted, circulated, being burnt by catalyst, reducing/regenerating,
Make reforming catalyst activity be maintained at a preferable level, reach the purpose for improving reaction depth.Reform
Catalyst has a small amount of dust and broken granule to produce during circular regeneration, needs continual collection,
And periodically produce.In reforming process catalyst dust collection system be high-temperature hydrogen environment, normal operating
Temperature is 170 DEG C, pressure 0.40MPa, and hydrogen and dust are all inflammable and explosive media.
Original design have two large-scale dust collections, normal one come into operation one it is standby, during daily production,
Switching is needed weekly once, and dust collection must first stop transport and cut out, and dust be drawn off after nitrogen displacement, so
Afterwards again with just coming into operation after nitrogen displacement air.
Because dust collection is very high to filtering accuracy requirement, dust collection is equipped with blowback system, pine
Dynamic system etc., turnover pipeline is various, switches come into operation operation process complexity, workload huge；Turnover in addition
Valve is various, and when isolation is cut out, Jing is commonly present valves leakage, and hydrogen exchange is not thorough, and operation
Temperature is high, causes operating risk to rise, unload dust it is serious when may cause hydrogen and catalyst dust burning.
Furthermore original design all operations need hand switch valve, operation difficulty and operating risk are increased, worked
Inefficiency.
The content of the invention
It is an object of the invention to provide a kind of face the system and method that dust is unloaded under hydrogen environment, the system and side
Method can unload dust in the case where dust collection is not stopped transport, and reduce field operation risk, reduce and wash in a pan
Gassing flowed fluctuation, strengthens catalyst regeneration system pressure and steadily controls, and reduces labor intensity.
To achieve these goals, present invention offer is a kind of faces the system that dust is unloaded under hydrogen environment, including powder
Dirt catcher, the system also includes：Nitrogen feedway；Dust surge tank, with the dust collection
With nitrogen feedway connection；Controller, nitrogen is provided extremely for controlling the nitrogen feedway
During the dust surge tank and the control dust surge tank discharge gas to replace the dust surge tank
Gas, and control the dust collection and unload dust to dust surge tank.
The present invention also provide it is a kind of face the method for dust unloaded under hydrogen environment include：Buffered with nitrogen displacement dust
Gas in tank；And from dust collection dust is unloaded to the dust surge tank.
By above-mentioned technical proposal, dust is unloaded at facing of providing using present invention system and side under hydrogen environment
Method, is provided with dust surge tank, using dust is discharged into into powder after the gas in nitrogen displacement dust surge tank
The gas in dust surge tank is replaced in dirt surge tank and again, then the dust in dust surge tank is discharged into
Dust bucket.Below can be automatically controlled by control valve and be completed, can not stopped transport in dust collection
In the case of unload dust, and reduce field operation risk, reduce the fluctuation of elutriation throughput, strengthen catalyst
Regenerative system pressure is steadily controlled, and reduces labor intensity.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Description of the drawings
Accompanying drawing is, for providing a further understanding of the present invention, and to constitute the part of description, with
Detailed description below is used to explain the present invention together, but is not construed as limiting the invention.
In accompanying drawing：
Fig. 1 is the structural representation for facing the system that dust is unloaded under hydrogen environment that the present invention is provided；
Fig. 2 is the structural representation for facing the system that dust is unloaded under hydrogen environment of the embodiment that the present invention is provided
Figure；
Fig. 3 is the flow chart for facing the method that dust is unloaded under hydrogen environment that the present invention is provided；
Fig. 4 is the flow process for facing under hydrogen environment the gas used in nitrogen displacement dust surge tank that the present invention is provided
Figure.
Description of reference numerals
The nitrogen feedway of 1 dust collection 2
3 dust surge tank 51 first controls valve
The 52 second control control valves of valve 53 the 3rd
The pressure detector of 6 filter 7
8 temperature detectors
Specific embodiment
The specific embodiment of the present invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that
Specific embodiment described herein is merely to illustrate and explains the present invention, is not limited to this
It is bright.
Fig. 1 is the structural representation for facing the system that dust is unloaded under hydrogen environment that the present invention is provided.Such as Fig. 1 institutes
Show, a kind of to face the system that dust is unloaded under hydrogen environment, including dust collection 1, the system also includes：Nitrogen
Air feed system 2；Dust surge tank 3, with the dust collection 1 and the nitrogen feedway 2
Connection；Controller, nitrogen is provided to the dust surge tank 3 for controlling the nitrogen feedway 2
Gas in discharging gas to replace the dust surge tank 3 with the control dust surge tank 3, and
Control the dust collection 1 and unload dust to dust surge tank 3.
Because hydrogen and dust are all inflammable and explosive media, thus in view of need nitrogen ensure unload dust
Shi Jinhang effects prevent danger, and in the present invention, controller can adopt PLC, make
Nitrogen is provided with to control nitrogen feedway 2, and controls dust surge tank 3 and discharge gas, with as far as possible
The gas being sufficiently displaced from dust surge tank 3, then controls dust collection 1 and starts to unload dust to dust
Surge tank 3, after dust is unsnatched, again repeatedly substitution gas step ensures safety, finally controls dust
Surge tank 3 unloads dust to dust bucket.
The device connected due to dust collection 1 and the periphery of dust collection 1 and connected mode etc. are existing
Technology, therefore will not be described here.The present invention can arrange the temperature detection being connected with dust collection 1
Device and pressure-detecting device, the temperature and pressure of convenient monitoring dust collection 1.
Below by by introduce a kind of more detailed embodiment be better described the present invention offer face hydrogen
The system that dust is unloaded under environment.
Fig. 2 is the structural representation for facing the system that dust is unloaded under hydrogen environment of the embodiment that the present invention is provided
Figure.As shown in Fig. 2 the system also includes：First control valve 51, positioned at the nitrogen feedway 2
And the dust surge tank 3 between, for opening when needing to provide nitrogen to the dust surge tank 3；
Second control valve 52, on the discharge duct of dust surge tank 3, needs to discharge the powder for working as
Open during gas in dirt surge tank 3；3rd control valve 53, positioned at the dust collection 1 and described
Between dust surge tank 3, for opening when the dust collection 1 unloads dust to dust surge tank 3.
When the system is provided with valve, control device can transfer control valve, and such as control first is controlled
The opening and closing of valve processed 51 controls the opening and closing of the second control valve 52 to control dust to control the supplement of nitrogen
Gas in surge tank 3 is discharged, and controls start and stop of the opening and closing of the 3rd valve 53 to control to unload dust.It is logical
Valve controlling is crossed, whole control process can be caused simpler and reasonable.
Gas in more accurately to replace dust surge tank 3, the present invention can also be to supplementing nitrogen and row
The opportunity for going out gas is defined, therefore the system can also include pressure detector 7, with the dust
Surge tank 3 connects, for detecting dust surge tank 3 in gas pressure.Pressure detector 7 can divide
For site pressure detector and remote pressure detector.As its name suggests, site pressure detector can be for existing
The gas pressure that field personnel are checked in dust surge tank 3, and remote pressure detector can be for non-at-scene people
Member understands the pressure in dust surge tank 3 from other channels.
When the offer of nitrogen feedway 2 nitrogen is controlled, when the pressure in dust surge tank 3 rises to
During first pressure threshold value, stop supplementing nitrogen.In the present invention, first pressure threshold value is 0.2-0.4MPa,
Preferably 0.3MPa.
When controlling the dust surge tank 3 and discharging gas, when the pressure in dust surge tank 3 is down to the
During two pressure thresholds, stop discharging gas.In the present invention, second pressure threshold value is 0.02-0.04MPa,
Preferably 0.03MPa.
The system also includes temperature detector 8, is connected with the dust surge tank 3, for detecting dust
Temperature in surge tank 3.It act as, although having completed substitution gas step, when dust surge tank
When 3 temperature is still too high, the step of carrying out substitution gas again is still needed to, until dust surge tank 3
Temperature is normal, just can start to unload dust.Thus, just can be properly completed from High Temperature High Pressure hydrogen environment to
Low-temp low-pressure nitrogen environment is changed.
Further, since the dust for unloading may be carried when dust surge tank 3 discharges gas, therefore should
System also includes filter 6, on the discharge duct of dust surge tank 3, for blocking with gas
The dust of discharge.In the case where there is filter 6, filter 6 often has because use time is long
The situation of blocking occurs, therefore can set on the right (i.e. outgassing direction) of filter as depicted 6
Putting another nitrogen feedway (not drawing) carries out blowback, and the dust of blocking filter 6 is blown back into powder
Dirt surge tank 3.Because the gas for blowback is still nitrogen, therefore will not be in dust surge tank 6
Gas impact.
The step of controller performs the gas in the use nitrogen displacement dust surge tank is once or more
It is secondary, when the temperature and pressure in dust surge tank 3 is normal till.
The controller is additionally operable to：Hold to the dust surge tank from dust collection unloading dust described
After the continuous scheduled time, the gas in the control discharge dust surge tank is until the dust surge tank
Pressure is down to second pressure threshold value, again with the gas in dust surge tank described in nitrogen displacement.
Fig. 3 is the flow chart for facing the method that dust is unloaded under hydrogen environment that the present invention is provided.As shown in figure 3,
It is a kind of face the method for dust unloaded under hydrogen environment include：With the gas in nitrogen displacement dust surge tank；And
From dust collection dust is unloaded to the dust surge tank.
Fig. 4 is the flow process for facing under hydrogen environment the gas used in nitrogen displacement dust surge tank that the present invention is provided
Figure.As shown in figure 4, in facing the method that dust is unloaded under hydrogen environment, with nitrogen displacement dust surge tank
The step of gas, includes：Nitrogen is supplemented to the dust surge tank, the pressure in the dust surge tank
When rising to first pressure threshold value, stop supplementing nitrogen；The gas in the dust surge tank is discharged, works as institute
When stating the pressure in dust surge tank and being down to second pressure threshold value, stop discharging gas；Execution is described to use nitrogen
The step of gas replaces the gas in dust surge tank one or many.
In addition, in order to ensure to replace thorough and more preferably safety, therefore described from dust collection
Unloading dust discharges the gas in the dust surge tank to the dust surge tank predetermined hold-time
Body is down to second pressure threshold value until the pressure of the dust surge tank, again with dust described in nitrogen displacement
Gas in surge tank.
Face unload under hydrogen environment dust method entirety detailed step be：
Start to supplement nitrogen to the dust surge tank；When the pressure in the dust surge tank rises to first
During pressure threshold, stop supplementing nitrogen, otherwise continue to supplement；Discharge the gas in the dust surge tank；
When the pressure in the dust surge tank is down to second pressure threshold value, stop discharging gas, otherwise continue
Discharge；Repeat above gas displacement step repeatedly (present invention is preferably 4 times)；Dust is unloaded to the powder
Dirt surge tank predetermined hold-time；The gas in the dust surge tank is discharged until the dust surge tank
Pressure when being down to second pressure threshold value, stop discharging gas, otherwise continue to discharge；Start to supplement nitrogen
To the dust surge tank；When the pressure in the dust surge tank rises to first pressure threshold value, stop
Nitrogen is supplemented, otherwise continues to supplement；Discharge the gas in the dust surge tank；When dust buffering
When pressure in tank is down to second pressure threshold value, stop discharging gas, otherwise continue to discharge；More than repeating
Gas displacement step is repeatedly (present invention is preferably 4 times)；Dust is unloaded to dust bucket.
If be controlled using control valve in above-mentioned steps, then nitrogen is supplemented each time, is discharged each time
Gas in dust surge tank and unload dust to closing control valve during dust surge tank, for the sake of insurance
Need to check whether control valve closes in place, due to being obvious common knowledge, here is just repeated no more.
By above-mentioned technical proposal, dust is unloaded at facing of providing using present invention system and side under hydrogen environment
Method, is provided with dust surge tank, using dust is discharged into into powder after the gas in nitrogen displacement dust surge tank
The gas in dust surge tank is replaced in dirt surge tank and again, then the dust in dust surge tank is discharged into
Dust bucket.Below can be automatically controlled by control valve and be completed, can not stopped transport in dust collection
In the case of unload dust, and reduce field operation risk, reduce the fluctuation of elutriation throughput, strengthen catalyst
Regenerative system pressure is steadily controlled, and reduces labor intensity.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing, but, the present invention is not limited
Detail in above-mentioned embodiment, in the range of the technology design of the present invention, can be to the present invention
Technical scheme carry out various simple variants, these simple variants belong to protection scope of the present invention.
It is further to note that each particular technique described in above-mentioned specific embodiment is special
Levy, in the case of reconcilable, can be combined by any suitable means, in order to avoid need not
The repetition wanted, the present invention is no longer separately illustrated to various possible compound modes.
Additionally, combination in any can also be carried out between a variety of embodiments of the present invention, as long as its
Without prejudice to the thought of the present invention, it should equally be considered as content disclosed in this invention.
Claims (12)
- It is 1. a kind of to face the system that dust is unloaded under hydrogen environment, including dust collection (1), it is characterised in that The system also includes：Nitrogen feedway (2)；Dust surge tank (3), with the dust collection (1) and the nitrogen feedway (2) even Connect；Controller, nitrogen is provided to the dust surge tank for controlling the nitrogen feedway (2) (3) and control during the dust surge tank (3) discharges gas to replace the dust surge tank (3) Gas, and control the dust collection (1) and unload dust to dust surge tank (3).
- 2. it is according to claim 1 to face the system that dust is unloaded under hydrogen environment, it is characterised in that should System also includes：First control valve (51), positioned at the nitrogen feedway (2) and the dust surge tank (3) Between, for opening when needing to provide nitrogen to dust surge tank (3)；Second control valve (52), on dust surge tank (3) discharge duct, for when needs Open when discharging the gas in the dust surge tank (3)；3rd control valve (53), positioned at the dust collection (1) and the dust surge tank (3) Between, for opening when the dust collection (1) unloads dust to dust surge tank (3).
- 3. it is according to claim 1 to face the system that dust is unloaded under hydrogen environment, it is characterised in that should System also includes filter (6), on dust surge tank (3) discharge duct, for blocking With the dust that gas is discharged.
- 4. it is according to claim 1 to face the system that dust is unloaded under hydrogen environment, it is characterised in that should System also includes pressure detector (7), is connected with the dust surge tank (3), for detecting dust Gas pressure in surge tank (3).
- 5. it is according to claim 4 to face the system that dust is unloaded under hydrogen environment, it is characterised in that control Make the nitrogen feedway (2) nitrogen is provided and dust surge tank (3) the discharge gas is controlled Including：When the pressure in dust surge tank (3) rises to first pressure threshold value, stop supplementing nitrogen；With AndWhen the pressure in dust surge tank (3) is down to second pressure threshold value, stop discharging gas.
- 6. it is according to claim 4 to face the method that dust is unloaded under hydrogen environment, it is characterised in that institute State one or many step of controller performs the gas in the use nitrogen displacement dust surge tank.
- 7. it is according to claim 4 to face the method that dust is unloaded under hydrogen environment, it is characterised in that institute State controller to be additionally operable to：Dust is unloaded to the dust surge tank predetermined hold-time, control described from dust collection Gas in the system discharge dust surge tank is down to second pressure until the pressure of the dust surge tank Threshold value, again with the gas in dust surge tank described in nitrogen displacement.
- 8. it is according to claim 1 to face the system that dust is unloaded under hydrogen environment, it is characterised in that should System also includes temperature detector (8), is connected with the dust surge tank (3), for detecting dust Temperature in surge tank (3).
- 9. it is a kind of to face the method that dust is unloaded under hydrogen environment, it is characterised in that the method includes：With the gas in nitrogen displacement dust surge tank；AndFrom dust collection dust is unloaded to the dust surge tank.
- 10. it is according to claim 9 to face the method that dust is unloaded under hydrogen environment, it is characterised in that to use The step of gas in nitrogen displacement dust surge tank, includes：Nitrogen is supplemented to the dust surge tank, when the pressure in the dust surge tank rises to first pressure During threshold value, stop supplementing nitrogen；AndThe gas in the dust surge tank is discharged, when the pressure in the dust surge tank is down to the second pressure During force threshold, stop discharging gas.
- 11. according to claim 9 face the method that dust is unloaded under hydrogen environment, it is characterised in that hold The step of gas in the row use nitrogen displacement dust surge tank one or many.
- 12. according to claim 9 face the method that dust is unloaded under hydrogen environment, it is characterised in thatDust is unloaded to the dust surge tank predetermined hold-time, arrange described from dust collection The gas gone out in the dust surge tank is down to second pressure threshold value until the pressure of the dust surge tank, Again with the gas in dust surge tank described in nitrogen displacement.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510661815.9A CN106586570B (en) | 2015-10-14 | 2015-10-14 | Face the system and method that dust is unloaded under hydrogen environment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510661815.9A CN106586570B (en) | 2015-10-14 | 2015-10-14 | Face the system and method that dust is unloaded under hydrogen environment |
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| CN106586570A true CN106586570A (en) | 2017-04-26 |
| CN106586570B CN106586570B (en) | 2019-11-15 |
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| CN108946176A (en) * | 2017-05-19 | 2018-12-07 | 中国石化工程建设有限公司 | A kind of devices and methods therefor of catalyst safe transport between mutual exclusion environment |
| CN111170822A (en) * | 2019-08-26 | 2020-05-19 | 浙江卫星能源有限公司 | Process for preparing propylene by propane dehydrogenation in superimposed on-line switchable fluid bed |
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| US5372653A (en) * | 1993-05-28 | 1994-12-13 | Courtaulds Fibres (Holdings) Limited | Cleaning of filters |
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| CN108946176A (en) * | 2017-05-19 | 2018-12-07 | 中国石化工程建设有限公司 | A kind of devices and methods therefor of catalyst safe transport between mutual exclusion environment |
| CN111170822A (en) * | 2019-08-26 | 2020-05-19 | 浙江卫星能源有限公司 | Process for preparing propylene by propane dehydrogenation in superimposed on-line switchable fluid bed |
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|---|---|
| CN106586570B (en) | 2019-11-15 |
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