CN104991543A - Moving bed catalyst continuous regeneration control system BRCS - Google Patents
Moving bed catalyst continuous regeneration control system BRCS Download PDFInfo
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- CN104991543A CN104991543A CN201510438787.4A CN201510438787A CN104991543A CN 104991543 A CN104991543 A CN 104991543A CN 201510438787 A CN201510438787 A CN 201510438787A CN 104991543 A CN104991543 A CN 104991543A
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- 239000003054 catalyst Substances 0.000 title claims abstract description 101
- 230000008929 regeneration Effects 0.000 title claims abstract description 54
- 238000011069 regeneration method Methods 0.000 title claims abstract description 54
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 176
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 89
- 238000007789 sealing Methods 0.000 claims abstract description 89
- 239000000463 material Substances 0.000 claims abstract description 87
- 239000007789 gas Substances 0.000 claims abstract description 83
- 238000000034 method Methods 0.000 claims abstract description 79
- 230000008569 process Effects 0.000 claims abstract description 73
- 230000008859 change Effects 0.000 claims abstract description 12
- 238000001514 detection method Methods 0.000 claims abstract description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000002955 isolation Methods 0.000 claims abstract description 10
- 239000001301 oxygen Substances 0.000 claims abstract description 10
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 10
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000001257 hydrogen Substances 0.000 claims abstract description 8
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 8
- 230000001172 regenerating effect Effects 0.000 claims description 39
- 125000004122 cyclic group Chemical group 0.000 claims description 38
- 230000001737 promoting effect Effects 0.000 claims description 25
- 239000000428 dust Substances 0.000 claims description 10
- 238000005243 fluidization Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 description 21
- 230000009467 reduction Effects 0.000 description 18
- 230000001276 controlling effect Effects 0.000 description 15
- 230000005540 biological transmission Effects 0.000 description 13
- 239000012495 reaction gas Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
- 230000006870 function Effects 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 238000011161 development Methods 0.000 description 4
- 230000018109 developmental process Effects 0.000 description 4
- 150000001336 alkenes Chemical class 0.000 description 3
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005660 chlorination reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 150000002829 nitrogen Chemical class 0.000 description 2
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 2
- 238000005987 sulfurization reaction Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical class CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000002153 concerted effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- -1 methanol toluene aromatic hydrocarbons Chemical class 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 235000013849 propane Nutrition 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/41865—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by job scheduling, process planning, material flow
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
Abstract
The invention provides a moving bed catalyst continuous regeneration control system BRCS, which comprises a loading and unloading control unit, a lifting control unit, a sealing control unit, and a pressure control unit, wherein the loading and unloading control unit is used for controlling a loading and unloading process of the catalyst in a regeneration device according to pressure detection information of the regeneration device and material level detection information of the catalyst in the regeneration device; the lifting control unit is used for controlling a circular transportation process of the catalyst in the regenerator, a first reactor, a second reactor and a third reactor; the sealing control unit is used for safe isolation between a hydrogen environment in the reactor and an oxygen environment in the regenerator; and the pressure control unit comprises a regenerator circular pressure control part for controlling an opening of an adjusting valve on a nitrogen pipeline in a balanced section according to differential pressure between the nitrogen pipeline in the balanced section of the regenerator and the inlet of the first reactor, and a differential pressure control part between a burnt section and the balanced section for controlling an opening of an adjusting valve of a balanced gas outlet pipeline according to a differential pressure change between the burnt section and the balanced section of the regenerator.
Description
Technical field
The invention relates to the technology of Coal Chemical Industry and petrochemical complex automatic field, particularly, is about a kind of movable bed catalyst cyclic regeneration control system BRCS.
Background technology
At present, along with the development of all kinds of moving bed aromatic hydrocarbons, olefin process, for devices such as such as methanol toluene aromatic hydrocarbons, light-hydrocarbon aromatized, dehydrogenating propanes, by the continuous reproduction process of movable bed catalyst, solve the problems such as the above-mentioned easy coking of various catalyst reactors, on-stream time be short.
The cyclic regeneration process of catalyzer need be realized by movable bed catalyst cyclic regeneration control system.At present, the software and hardware of such control system mainly relies on foreign patent business to provide, the UOP of the such as U.S. and the Axens of France.But for a long time, due to foreign patent business maintaining secrecy and blocking its movable bed catalyst cyclic regeneration control system technology, make domestic carrying out relevant item, fund input or technology communication all run into very large resistance.Therefore, invent the continuous catalyst regenerating control system of a set of autonomous Design, form the control system scheme with independent intellectual property right, the development for China's moving bed process is significant.The drawback existing for foreign patent technology can not only be solved, the gap between China and external related-art technology can also be reduced, solve a difficult problem for moving-burden bed reactor continuous catalyst regenerating control system production domesticization.
Summary of the invention
The fundamental purpose of example of the present invention is to provide a kind of movable bed catalyst cyclic regeneration control system BRCS with independent intellectual property right, and it be applied in the control system of all kinds of movable bed catalyst cyclic regeneration, thus solve the drawback in the past relying on foreign patent business.Therefore, this project has a very important role for the production domesticization of all kinds of moving bed device from now on.
To achieve these goals, example of the present invention provides a kind of movable bed catalyst cyclic regeneration control system BRCS, for controlling the continuous catalyst regenerating cyclic process of movable bed catalyst regenerating unit.
Described movable bed catalyst regenerating unit comprises: regenerator, regenerator top surge tank, locking hopper, regenerator bottom hopper, the first reactor, the second reactor, the 3rd reactor, reactor top hopper, nitrogen-sealed tank, reactor lower part hopper.
Movable bed catalyst regenerating unit is provided with pressure instrumentation, level sensing instrument, flow instrumentation and by-pass valve control.
Described movable bed catalyst cyclic regeneration control system BRCS comprises: loading and unloading control module, lifting control module, sealing control module and pressure control unit.
Described loading and unloading control module controls the loading and unloading process of catalyzer in regenerating unit according to the material-level measure information of catalyzer in the pressure detection information of regenerating unit and regenerating unit; Described loading and unloading process comprises: a) catalyzer falls to the loading process of locking hopper from regenerator top surge tank; And b) catalyzer falls to the uninstall process in the top memory district of regenerator from locking hopper;
Described lifting control module is for controlling catalyzer at regenerator, first reactor, circulation course of conveying between second reactor and the 3rd reactor, lifting control module comprises: first promotes control section, second promotes control section, 3rd promotes control section and the 4th promotes control section, wherein, described first promotes control section controls the conveying of catalyzer from regenerator to the first reactor, second promotes control section controls the conveying of catalyzer from the first reactor to the second reactor, 3rd promotes control section controls catalyzer from the second reactor to the conveying of the 3rd reactor, 4th promotes control section controls catalyzer from the 3rd reactor to the conveying of regenerator,
Described sealing control module is for the Secure isolation of the oxygen environment of the hydrogen environment and regenerator that carry out reactor, sealing control module comprises: regenerator memory block sealing control section, regenerator bottoms sealing control section, anti-top hopper sealing control section, nitrogen-sealed tank and a contrast means of press seals control section and three anti-bottom hoppers seal control section, wherein, a) sealing control section in regenerator memory block carries out the sealing control of regenerator memory block according to the differential pressure change of internal regenerator; B) regenerator bottoms sealing control section changes according to the differential pressure between regenerator and regenerator bottom hopper the sealing carrying out regenerator bottoms and controls; C) sealing that an anti-top hopper sealing control section changes according to the top hopper of the first reactor and the differential pressure of nitrogen-sealed tank the top hopper carrying out the first reactor controls; D) nitrogen-sealed tank and a contrast means of press seals control section change the differential pressure of carrying out the first reactor according to the differential pressure between nitrogen-sealed tank and the first reactor and seal and control; E) sealing that three anti-bottom hoppers sealing control sections change according to the differential pressure of the lifting gas of the bottom hopper of the bottom hopper of the 3rd reactor and the 3rd reactor the bottom hopper carrying out the 3rd reactor controls;
Described pressure control unit comprises: regenerator circulating pressure control section and the differential pressure control section between the section of burning and balancing segment, wherein, a) regenerator circulating pressure control section controls the aperture of variable valve on balancing segment nitrogen pipeline according to the differential pressure of the entrance of regenerator balancing segment nitrogen pipeline and the first reactor; B) the differential pressure control section between the section of burning and balancing segment controls Balance Air outlet conduit control valve opening according to the differential pressure change between the regenerator section of burning and balancing segment.
In one example, above-mentioned loading process comprises: be provided with catalyst valve and air sealing valve between described regenerator top surge tank and locking hopper, loading and unloading control module obtains material level value by the material-level measure meter be arranged on regenerator top surge tank and locking hopper, obtains the differential pressure value between regenerator top surge tank and locking hopper by the pressure unit be arranged on regenerator top surge tank and locking hopper; Loading and unloading control module controls the on off state of catalyst valve and the air sealing valve be arranged between regenerator top surge tank and locking hopper according to described material level value and differential pressure value, to control catalyzer to fall to locking hopper loading process from regenerator top surge tank; Above-mentioned uninstall process comprises: be provided with catalyst valve and air sealing valve between described locking hopper and regenerator, loading and unloading control module obtains material level value by the material-level measure meter be arranged on locking hopper and regenerator, obtains the differential pressure value between locking hopper and regenerator by the pressure unit be arranged on locking hopper and regenerator; Loading and unloading control module controls the on off state of catalyst valve and the air sealing valve be arranged between locking hopper and regenerator according to described material level value and differential pressure value, to control catalyzer to fall to the top memory district of regenerator uninstall process from locking hopper.
In one example, above-mentioned lifting control module controls the circulation course of conveying of catalyzer between regenerator, the first reactor, the second reactor and the 3rd reactor, and wherein, total gas that promotes is divided into two parts: once promote gas, determine catalyst circulation rate; Second lift gas, makes catalyst fluidization; By changing the total flow velocity of flow control catalyzer in pipe promoting gas; Described first promotes control section, controls the aperture of the differential pressure control valve in second lift feed channel, to control the internal circulating load of the first lifting catalyzer according to the differential pressure between second lift gas and an anti-top hopper; Total stability of flow promoting gas is ensured, to control the flowing velocity of the first lifting catalyzer by controlling once to promote gas variable valve; Described second promotes control section, controls the aperture of the differential pressure control valve in second lift feed channel, to control the internal circulating load of the second lifting catalyzer according to the differential pressure between second lift gas and two anti-top hoppers; Total stability of flow promoting gas is ensured, to control the flowing velocity of the second lifting catalyzer by controlling once to promote gas variable valve; Described 3rd promotes control section, controls the aperture of the differential pressure control valve in second lift feed channel according to the differential pressure between second lift gas and three anti-top hoppers, to control the internal circulating load that the 3rd promotes catalyzer; Total stability of flow promoting gas is ensured, to control the flowing velocity that the 3rd promotes catalyzer by controlling once to promote gas variable valve; Described 4th promotes control section, controls the aperture of the differential pressure control valve in second lift feed channel according to the differential pressure between second lift gas and regenerator top surge tank, to control the internal circulating load that the 4th promotes catalyzer; Total stability of flow promoting gas is ensured, to control the flowing velocity that the 4th promotes catalyzer by controlling once to promote gas variable valve.
In one example, above-mentioned sealing control module guarantees the Secure isolation of the high-tension apparatus of reactive moieties and the low-voltage equipment of regenerating section, guarantee the Secure isolation of the hydrogen environment of reactive moieties and the oxygen environment of regenerating section, wherein, a) regenerator memory block sealing control section specifically for: described nitrogen pipeline is provided with differential pressure control valve to the connecting tube on regenerator top, sealing control section in regenerator memory block obtains differential pressure value by the differential pressure transmitter be arranged between regenerator memory block and the regenerator section of burning, and control nitrogen pipeline control valve opening according to this differential pressure value, preset value is remained on to make this differential pressure value, b) regenerator bottoms sealing control section specifically for: described nitrogen pipeline establishes differential pressure control valve to the connecting tube of regenerator bottom hopper, regenerator bottoms sealing control section obtains differential pressure value by the differential pressure transmitter be arranged between regenerator bottoms and regenerator bottom hopper nitrogen pipeline, and the aperture of nitrogen pipeline variable valve is controlled according to this differential pressure value, remain on preset value to make this differential pressure value, c) an anti-top hopper sealing control section specifically for: between the top hopper and the first reactor of described first reactor, be provided with a nitrogen-sealed tank, one anti-top hopper sealing control section obtains differential pressure value by the differential pressure transmitter be arranged between an anti-top hopper and nitrogen-sealed tank, control the aperture of the dust collection bleed off pipeline variable valve of an anti-top hopper according to this differential pressure value, remain on preset value to make this differential pressure value, d) nitrogen-sealed tank and a contrast means of press seals control section specifically for: obtain differential pressure value by the differential pressure transmitter be arranged between nitrogen-sealed tank and the first reactor, according to the aperture of this differential pressure value Staged cotrol nitrogen-sealed tank flare discharge pipeline variable valve and nitrogen pipeline variable valve, remain on preset value to make this differential pressure value, e) three anti-bottom hoppers sealing control sections specifically for: obtain differential pressure value by the differential pressure transmitter be arranged between the 3rd reactor and the 4th riser, control the aperture of regenerator top hopper dust collection bleed off pipeline variable valve according to this differential pressure value, remain on preset value to make this differential pressure value.
In one example, regenerator circulating pressure control section specifically for: the balancing segment nitrogen pipeline of described regenerator arranges differential pressure control valve, described regenerator circulating pressure control section obtains differential pressure value by the differential pressure transmitter of regenerator balancing segment nitrogen pipeline and an anti-entrance, control the aperture of differential pressure control valve according to this differential pressure value, remain on preset value to make this differential pressure value; Differential pressure control section between the section of burning and balancing segment specifically for: the Balance Air pipeline of described regenerator arranges differential pressure control valve, differential pressure control section between the described section of burning and balancing segment obtains differential pressure value by the differential pressure transmitter between the internal regenerator section of burning and balancing segment, control the aperture of differential pressure control valve according to this differential pressure value, remain on preset value to make this differential pressure value.
The beneficial effect of example of the present invention is, consider the many factors (material level in regenerating unit, pressure reduction, sealing etc.) in the regeneration cycle process of movable bed catalyst, the mutual Collaboration of each control procedure, make the cyclic regeneration cyclic process of catalyzer safely, steadily, long-term operation.
Enforcement of the present invention indicates that domestic movable bed catalyst regeneration robot control system(RCS) correlation technique has successfully broken foreign technology monopolization and restriction, defines the homemade goods had from dominant patent, independent intellectual property right.Therefore, the exploitation of movable bed catalyst regeneration special self-control system BRCS contributes to the development promoting all kinds of moving bed device.For road has been paved in the development of domestic all kinds of moving bed aromatic hydrocarbons, olefin process and enforcement.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of example of the present invention, below the accompanying drawing used required in describing example is briefly described:
Fig. 1 is the structural representation of the movable bed catalyst cyclic regeneration control system according to example of the present invention;
Fig. 2 is the structural representation of the movable bed catalyst regeneration special self-control system BRCS according to example of the present invention;
Fig. 3 is the enlarged schematic partial view promoting control section according to the loading and unloading control module and first of example of the present invention;
Fig. 4 is the enlarged schematic partial view promoting control section according to second of example of the present invention;
Fig. 5 is the enlarged schematic partial view promoting control section according to the 3rd of example of the present invention;
Fig. 6 is the enlarged schematic partial view promoting control section according to the 4th of example of the present invention;
Fig. 7 is the enlarged diagram of the regenerator according to example of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in example of the present invention, be clearly and completely described the technical scheme in example of the present invention, obviously, described example is only the present invention's part example, instead of whole examples.Based on the example in the present invention, those of ordinary skill in the art, not making the every other example obtained under creative work prerequisite, belong to the scope of protection of the invention.
Example of the present invention provides a kind of movable bed catalyst cyclic regeneration control system BRCS.Below in conjunction with accompanying drawing, the present invention is described in detail.
The feature of moving bed process flow process is: make catalyzer rise to the top of next reactor continuously through riser from the bottom of first reactor, and from the lower lift of last reactor to regenerator, after in a regenerator regeneration process being carried out to catalyzer, turn back to again first reactor.This moving bed process allows whole system to operate under comparatively exacting terms, can make the activity that catalyzer keeps higher often, pressure and hydrogen-oil ratio lower, product yield is higher.And stable operation, running period is long.
In the regeneration cycle process of catalyzer, catalyzer loses activity because of carbon deposit, by burning, chlorination renewal, the process such as reduction-sulfurization, reply the activity of catalyzer.Be hydrogen environment in reactor, be oxygen environment in regenerator, the working pressure of simultaneous reactions part and regenerating section is different.In order to ensure the transmission of catalyzer in reactive moieties and regenerating section safety, guarantee the high-tension apparatus of reactive moieties and the low-voltage equipment Secure isolation of regenerating section, guarantee the Secure isolation of the hydrogen environment of reactive moieties and the oxygen environment of regenerating section, and guarantee the safety of catalyzer and equipment in regenerative process, in example of the present invention, be provided with movable bed catalyst cyclic regeneration control system, the major function that this movable bed catalyst cyclic regeneration control system realizes is: be used for the loading and unloading process control of continuous catalyst regenerating part, rate of catalyst flow controls and safety interlocking controls (sealing controls and Stress control), thus provide one safer, stable, the catalyst cyclic regeneration process that stream cycle time is longer.
As shown in Figure 1, the movable bed catalyst cyclic regeneration control system BRCS of example of the present invention is for controlling the continuous catalyst regenerating cyclic process of movable bed catalyst regenerating unit, the major equipment of this movable bed catalyst regenerating unit comprises: regenerator 1, regenerator top surge tank 16, locking hopper 17, regenerator bottom hopper 18, first reactor 2, second reactor 3, 3rd reactor 4, reactor top hopper, nitrogen-sealed tank 37 and reactor lower part hopper etc., wherein, at the first above-mentioned reactor 2, second reactor 3, the top of the 3rd reactor 4 is provided with an above-mentioned reactor top hopper and (is respectively an anti-top hopper 30, two anti-top hopper 38 and three anti-top hoppers 45), at the first reactor 2, second reactor 3, the below of the 3rd reactor 4 is provided with an above-mentioned reactor lower part hopper and (is respectively an anti-bottom hopper 31, two anti-bottom hopper 39 and three anti-bottom hoppers 46).
Catalyzer is by the conveying of each section of riser, carry successively according to the order of " regenerator 1, first reactor 2, second reactor 3, the 3rd reactor 4 ", the 4th riser 10 is passed through by catalyst transport to regenerator 1 again by the 3rd reactor 4, and again carry successively according to the order of above-mentioned " regenerator 1, first reactor 2, second reactor 3, the 3rd reactor 4 ", thus, catalyzer circulation course of conveying in the entire system is just defined.
Above-mentioned nitrogen header pipe 5 is respectively to nitrogen injection in the first riser 7, second riser 8, the 3rd riser 9 and the 4th riser 10, for the conveying of catalyzer in each riser provides power, ensure that catalyzer can be transported in the reactor or regenerator be connected with riser in each riser.
In example of the present invention, movable bed catalyst cyclic regeneration control system mainly comprises four controlling functions: catalyst loading and Unloading Control, catalyzer promote control, catalyst recirculation seals and controls and catalyst recirculation Stress control.In concrete enforcement, be complete each above-mentioned controlling functions by regeneration special self-control system BRCS, in regeneration special self-control system BRCS, include corresponding steering logic and come correspondingly to complete above-mentioned controlling functions.As shown in Figure 2, according to the difference of concrete controlling functions, regeneration special self-control system BRCS includes loading and unloading control module, promotes control module, seals control module and pressure control unit, is described in detail by the concrete function in conjunction with each control module hereinafter.
For realizing catalyst loading and Unloading Control process, in regeneration special self-control system BRCS, be provided with loading and unloading control module.Loading and unloading control module controls the loading and unloading process of catalyzer in regenerating unit according to the material-level measure information of catalyzer in the pressure detection information of regenerating unit and regenerating unit; This loading and unloading process mainly comprises following two parts: a) catalyzer falls to the loading process of locking hopper 17 from regenerator top surge tank 16; And b) catalyzer falls to the uninstall process in the top memory district of regenerator 1 from locking hopper 17.Be described further below in conjunction with the function of accompanying drawing to loading and unloading control module.
As shown in Figure 3, loading and unloading control module is connected with regenerator 1, and loading and unloading control module is according to the loading and unloading process of material-level measure information adjustment catalyzer in regenerator 1 of catalyzer in the pressure detection information of regenerator 1 and regenerator 1.Particularly, as shown in Figure 3, above-mentioned regenerator top surge tank 16, locking hopper 17, regenerator 1 and regenerator bottom hopper 18 are connected from top to bottom in turn by delivery pipe.
Regenerator top surge tank 16, locking hopper 17 and regenerator 1 are provided with material-level measure meter 19 and pressure unit 20, material-level measure meter 19 is for obtaining the material-level measure information in regenerator top surge tank 16 corresponding with it, locking hopper 17 or regenerator 1, and pressure unit 20 is for obtaining the pressure detection information in regenerator top surge tank 16 corresponding with it, locking hopper 17 or regenerator 1.Above-mentioned loading and unloading control module is then connected with each material-level measure meter 19 and each pressure unit 20 respectively, thus the material-level measure information obtained in material-level measure meter 19 and the pressure detection information in pressure unit 20.
Nitrogen header pipe 5 is connected with regenerator top surge tank 16, locking hopper 17 and regenerator 1 respectively by equalizing valve 21.Particularly, regenerator top surge tank 16, locking hopper 17 and regenerator 1 are connected with a gas transmission branch road respectively, and this nitrogen header pipe 5 is connected with each gas transmission branch road respectively by a gas transmission main road.In gas transmission main road, be provided with an equalizing valve 21, in the gas transmission branch road be connected with regenerator top surge tank 16 and regenerator 1 respectively, be respectively provided with an equalizing valve 21.Equalizing valve 21 is used for balance regenerator top surge tank 16 and locking hopper 17 and the pressure between locking hopper 17 and regenerator 1.Equalizing valve 21 in gas transmission main road, also referred to as benefit nitrogen valve, supplements nitrogen, to improve the pressure in locking hopper 17 for giving in locking hopper 17.Be connected in the gas transmission main road of locking hopper 17 in above-mentioned nitrogen header pipe 5, be provided with a nitrogen discharge pipe 22, this nitrogen discharge pipe 22 is provided with a bleed valve 23, this bleed valve 23 for being locking hopper 17 relieving pressure, to reduce the pressure in locking hopper 17.
As shown in Figure 3, in the delivery pipe connecting regenerator top surge tank 16, locking hopper 17 and regenerator 1, catalyst valve 24 and air sealing valve 25 is respectively arranged with.After obtaining material-level measure information and pressure detection information, loading and unloading control module then can control the on off state of catalyst valve 24, air sealing valve 25 and equalizing valve 21 according to this material-level measure information and pressure detection information, thus the loading and unloading process of adjustment catalyzer in regenerator 1.
In actual applications, loading and unloading control module is before the loading process controlling beginning catalyzer, and first can perform an initialization testing process, whether all stop valves detecting loading and unloading part in whole movable bed catalyst regenerating unit are in closed condition.
When in whole movable bed catalyst regenerating unit, all valves of loading and unloading part are all in closed condition, according to the material-level measure information in the material-level measure meter 19 be arranged on locking hopper 17, this loading and unloading control module judges that whether the material level of the catalyzer in locking hopper 17 is lower than a locking material level setting value.When the material level in locking hopper 17 is lower than this locking material level setting value, illustrates in locking hopper 17 to hold and carry the catalyzer got off from regenerator top surge tank 16.
In the loading process of catalyzer, first loading and unloading control module judges whether the absolute value of the pressure reduction between regenerator top surge tank 16 and locking hopper 17 meets a pressure reduction critical value (is such as 0.15kg/cm
2), if the absolute value of the pressure reduction between regenerator top surge tank 16 and locking hopper 17 is greater than this pressure reduction critical value, generally, be that the pressure be higher than in regenerator top surge tank 16 due to the pressure in locking hopper 17 causes.Now, under the control of loading and unloading control module, open bleed valve 23, thus reduce the pressure in locking hopper 17, until the absolute value of pressure reduction between regenerator top surge tank 16 and locking hopper 17 meets this pressure reduction critical value.When the absolute value of the pressure reduction between locking hopper 17 and regenerator top surge tank 16 meets this pressure reduction critical value, under the control of loading and unloading control module, open and be connected to equalizing valve 21 (UV005 in Fig. 3) between regenerator top surge tank 16 and locking hopper 17 (if opened bleed valve 23 when adjusting the pressure reduction between regenerator top surge tank 16 and locking hopper 17, then need first to close bleed valve 23, open the equalizing valve 21 be connected between regenerator top surge tank 16 and locking hopper 17 again), regenerator top surge tank 16 is communicated with between locking hopper 17, keep pressure equilibrium.Now, can ensure that the catalyzer in regenerator top surge tank 16 drops down onto in locking hopper 17 under gravity.
Now, according to the material-level measure information in the material-level measure meter 19 be arranged on regenerator top surge tank 16, loading and unloading control module judges whether the material level in regenerator top surge tank 16 reaches one first material level particular value (being such as regenerator top surge tank 16 capacity 70%) further.If the material level of the catalyzer in regenerator top surge tank 16 reaches this first material level particular value, then illustrate and can start the catalyst loading in regenerator top surge tank 16 to the process of locking hopper 17.
Then, loading and unloading control module opens catalyst valve 24 between regenerator top surge tank 16 and locking hopper 17 and air sealing valve 25, enters in locking hopper 17 under making the catalyzer in regenerator top surge tank 16.As shown in Figure 3, delivery pipe between regenerator top surge tank 16 and locking hopper 17 is disposed with this catalyst valve 24 and air sealing valve 25, in delivery pipe, accumulation is produced for avoiding catalyzer, first should open the air sealing valve 25 near locking hopper 17 side, then open the catalyst valve 24 near surge tank 16 side, regenerator top.Prove that locking hopper 17 is about to fill when the material-level measure meter 19 on locking hopper 17 shows high warning, now, then successively close the catalyst valve 24 between regenerator top surge tank 16 and locking hopper 17 and air sealing valve 25, the loading process of catalyzer terminates.
It is more than the loading process (catalyzer being injected into the process in locking hopper 17 by regenerator top surge tank 16) of the catalyzer completed under loading and unloading control module controls.Then the uninstall process of catalyzer has namely been controlled by loading and unloading control module, loading and unloading control module is before the uninstall process controlling beginning catalyzer, first, detect the stop valve that in whole movable bed catalyst regenerating unit, loading and unloading part is all and whether be in closed condition.When the stop valve that loading and unloading part in whole movable bed catalyst regenerating unit is all is all in closed condition, judge whether little than the pressure in regenerator 1 0.15kg/cm of pressure in locking hopper 17
2.If the little 0.15kg/cm of pressure in the pressure ratio regenerator 1 in locking hopper 17
2under the control of loading and unloading control module, now open the equalizing valve 21 (UV008 in Fig. 3) be connected in above-mentioned nitrogen header pipe 5 in the gas transmission main road of locking hopper 17, to locking hopper 17 pressurising, improve the pressure in locking hopper 17, until the large 0.15kg/cm of force value in pressure ratio regenerator 1 in locking hopper 17
2.
As the large 0.15kg/cm of force value in the pressure ratio regenerator 1 in locking hopper 17
2time, under the control of loading and unloading control module, open and be connected to equalizing valve 21 (UV006 in Fig. 3) between locking hopper 17 and regenerator 1 (if opened equalizing valve 21 (UV008) when adjusting the pressure reduction between locking hopper 17 and regenerator 1, then need first to close this equalizing valve 21 (UV008), open the equalizing valve 21 (UV006) be connected between locking hopper 17 and regenerator 1 again), make to be communicated with between locking hopper 17 with regenerator 1, keep pressure equilibrium.Now, can ensure that the catalyzer in locking hopper 17 drops down onto in regenerator 1 under gravity.
Then, judge that whether material level in regenerator 1 top memory district is lower than a regenerator material level setting value by loading and unloading control module according to the material-level measure information in the material-level measure meter 19 be arranged on regenerator 1.
If the material level in regenerator 1 top memory district is lower than this regenerator material level setting value, then illustrate in regenerator 1 and can hold the catalyzer carrying to get off from locking hopper 17, now, loading and unloading control module opens catalyst valve 24 between locking hopper 17 and regenerator 1 and air sealing valve 25, enters in regenerator 1 under making the catalyzer in locking hopper 17.As shown in Figure 3, delivery pipe between locking hopper 17 and regenerator 1 is disposed with this catalyst valve 24 and air sealing valve 25, in delivery pipe, accumulation is produced for avoiding catalyzer, first should open the air sealing valve 25 near regenerator 1 side, then open the catalyst valve 24 near locking hopper 17 side.Prove that locking hopper 17 inner catalyst is about to fall into completely the top memory district of regenerator 1 when the material-level measure meter 19 on locking hopper 17 shows low warning of material level, now, catalyst valve 24 then successively between close-lock hopper 17 and regenerator 1 and air sealing valve 25, the uninstall process of catalyzer terminates.
More than loading and the Unloading Control process of the catalyzer that the loading and unloading control module by regenerating special self-control system BRCS completes.In actual applications, operating personnel also can control the cyclic regeneration process stopping whole catalyzer as required at any time, and the cyclic regeneration process of catalyzer can be restarted by above-mentioned loading process or uninstall process.And when loading and unloading control module detects abnomal condition (valve state, failsafe valve, detecting instrument fault etc. as mistake), the loading or unloading process controlling catalyzer stops in the current generation by loading and unloading control module, and show a warning message, after Resolving probiems (be adjusted to correct operating parameter and after eliminating abnormality), just can continue the loading or unloading process of catalyzer.
When catalyzer in regenerator 1 by burning, after chlorination renewal, the process reverts back such as reduction-sulfurization recover the activity of catalyzer, namely fall in the regenerator bottom hopper 18 be connected with regenerator 1, wait for the catalyst transport to the first of activity recovery reactor 2 by the first riser 7.For realizing that the catalyzer after coke burning regeneration is delivered to each reactor from the delivery outlet of regenerator 1, in the regeneration special self-control system BRCS of example of the present invention, be provided with lifting control module, this lifting control module is for controlling the circulation course of conveying of catalyzer between regenerator 1, first reactor 2, second reactor 3 and the 3rd reactor 4.Particularly, this lifting control module comprises: first promotes control section 12, second promotes control section 13, the 3rd lifting control section 14 and the 4th lifting control section 15, completes above-mentioned catalyzer promote control procedure by the concerted action of each lifting control section.Catalyzer promotes the object controlled and mainly contains two: (1) reduces catalyst abrasion; (2) persistent loop of catalyzer is kept.The power source that catalyzer promotes is the total lifting gas carried by above-mentioned nitrogen header pipe 5, and this always promotes gas and is divided into two parts: once promote gas, determines catalyst circulation rate; Second lift gas, makes catalyst fluidization; By changing the total flow velocity of flow control catalyzer in pipe promoting gas.In example of the present invention, this always promotes gas is low-pressure nitrogen.Promote control section 12, second below in conjunction with above-mentioned first and promote the respective function of control section 13, the 3rd lifting control section 14 and the 4th lifting control section 15, the catalyzer lifting control procedure that the regeneration special self-control system BRCS of example of the present invention realizes is described in detail.
As shown in Figure 3, the first above-mentioned lifting control section 12 is connected respectively with regenerator 1 and nitrogen header pipe 5.The delivery outlet of above-mentioned regenerator bottom hopper 18 is connected with the input port of an anti-top hopper 30 of the first reactor 2 by the first riser 7.
The first pressure-difference valve 26 is provided with between nitrogen header pipe 5 and the first riser 7, first promotes control section 12 is connected respectively with one first pressure difference test meter 27 and this first pressure-difference valve 26, this first pressure difference test meter 27 is arranged between nitrogen header pipe 5 and an anti-top hopper 30 of the first reactor 2, to detect the first pressure difference between nitrogen header pipe 5 and an anti-top hopper 30.First promotes control section 12 is connected that (carrying path that first-class gauge 28 and first flow variable valve 29 are formed can be described as the once lifting branch road of nitrogen header pipe 5 in the first lift portion respectively with the first-class gauge 28 be arranged in nitrogen header pipe 5 and first flow variable valve 29, above-mentioned once lifting gas once promotes in branch road at this and circulates), first flow variable valve 29 and the first pressure-difference valve 26 are positioned at the different branch of nitrogen header pipe 5, this first pressure-difference valve 26 is arranged in the second lift branch road of nitrogen header pipe 5 in the first lift portion, above-mentioned second lift gas circulates in this second lift branch road.First promotes control section 12 controls the first pressure-difference valve 26 aperture according to the first pressure difference, and namely control the operational throughput of nitrogen in second lift branch road, adjustable is carried the internal circulating load of catalyzer to the first riser 7 by regenerator bottom hopper 18.
Particularly, first promote control section 12 and whether reach one according to the pressure reduction that the first pressure difference judges between an anti-top hopper 30 and regenerator bottom hopper 18 to preset pressure difference (be such as 0.15kg/cm
2).If this first pressure difference does not reach this default pressure difference, the aperture of the first pressure-difference valve 26 is adjusted under promoting the control of control section 12 first, to regulate the pressure reduction between an anti-top hopper 30 and regenerator bottom hopper 18, make the first differential pressure value be adjusted to this default pressure difference, thus enable catalyzer be delivered to an anti-top hopper 30 of the first reactor 2 smoothly by the first riser 7.
First promotes control section 12 controls first flow variable valve 29 aperture according to the first-class value obtained from first-class gauge 28, carry to the first riser 7 flow once promoting gas to control nitrogen header pipe 5, by adjustment once promote the flow of gas number control the flowing velocity of the first riser 7 inner catalyst.
As shown in Figure 4, second promotes control section 13 is connected respectively with the first reactor 2 and nitrogen header pipe 5, and particularly, anti-top hopper 30, first reactor 2 and an anti-bottom hopper 31 are connected successively by delivery pipe.The delivery outlet of an above-mentioned anti-bottom hopper 31 is connected with the input port of two anti-top hoppers 38 of the second reactor 3 by the second riser 8.
The second pressure-difference valve 32 is provided with between nitrogen header pipe 5 and the second riser 8, second promotes control section 13 is connected respectively with one first level-sensing device 33,1 second pressure difference test meter 34 and this second pressure-difference valve 32, this first level-sensing device 33 is arranged on an anti-top hopper 30, in order to detect the first material level value of catalyzer in an anti-top hopper 30.This second pressure difference test meter 34 is arranged between nitrogen header pipe 5 and two anti-top hoppers 38, to detect the second pressure difference between nitrogen header pipe 5 and two anti-top hoppers 38.Second promotes control section 13 is connected that (the gas transmission path that second gauge 35 and second adjustable valve 36 are formed can be described as the once lifting branch road of nitrogen header pipe 5 in the second lift portion respectively with the second gauge 35 be arranged in nitrogen header pipe 5 and second adjustable valve 36, above-mentioned once lifting gas once promotes in branch road at this and circulates), second adjustable valve 36 and the second pressure-difference valve 32 are positioned at the different branch of nitrogen header pipe 5, this second pressure-difference valve 32 is arranged in the second lift branch road of nitrogen header pipe 5 in the second lift portion, above-mentioned second lift gas circulates in this second lift branch road.Second promotes control section 13 controls the second pressure-difference valve 32 aperture according to the first material level value and the second pressure difference, namely control the operational throughput of nitrogen in the second lift branch road in the second lift portion, adjustable is carried the internal circulating load of catalyzer to the second riser 8 by an anti-bottom hopper 31.
Particularly, the second lifting control section 13 judges that whether this first material level value is higher than a material level preset value.When the first material level value is higher than material level preset value, the aperture adjusting the second pressure-difference valve 32 under control section 13 controls is promoted second, thus adjustment catalyzer is delivered to the internal circulating load of two anti-top hoppers 38 by the second riser 8, the material level of catalyzer in one anti-top hopper 30 is declined, moves closer to this material level preset value.And when the first material level value is lower than this material level preset value, second promotes the aperture that control section 13 adjusts the second pressure-difference valve 32, to adjust catalyzer to be delivered to two anti-top hoppers 38 internal circulating load by the second riser 8, make this first material level value close to this material level preset value.
Second promotes control section 13 controls second adjustable valve 36 aperture according to the second value obtained from second gauge 35, carry to the second riser 8 flow once promoting gas to control nitrogen header pipe 5, by adjustment once promote the flow of gas number control the flowing velocity of the second riser 8 inner catalyst.
As shown in Figure 5, the 3rd promotes control section 14 is connected respectively with the second reactor 3 and nitrogen header pipe 5, and particularly, two anti-top hopper 38, second reactors 3 and two anti-bottom hoppers 39 are connected successively by delivery pipe.The delivery outlet of above-mentioned two anti-bottom hoppers 39 is connected with the input port of three anti-top hoppers 44 of the 3rd reactor 4 by the 3rd riser 9.
The 3rd pressure-difference valve 40 is provided with between nitrogen header pipe 5 and the 3rd riser 9,3rd promotes control section 14 is connected respectively with one second level-sensing device 41, the 3rd pressure difference test meter 42 and the 3rd pressure-difference valve 40, this second level-sensing device 41 is arranged on two anti-top hoppers 38, in order to detect the second material level value of catalyzer in two anti-top hoppers 38.3rd pressure difference test meter 42 is arranged between nitrogen header pipe 5 and three anti-top hoppers 45, to detect the 3rd pressure difference between nitrogen header pipe 5 and three anti-top hoppers 45.3rd promotes control section 14 is connected that (the gas transmission path that the 3rd flowmeter 43 and the 3rd flow control valve 44 are formed can be described as the once lifting branch road of nitrogen header pipe 5 in the 3rd lift portion respectively with the 3rd flowmeter 43 be arranged in nitrogen header pipe 5 and the 3rd flow control valve 44, above-mentioned once lifting gas once promotes in branch road at this and circulates), 3rd flow control valve 44 and the 3rd pressure-difference valve 40 are positioned at the different branch of nitrogen header pipe 5, 3rd pressure-difference valve 40 is arranged in the second lift branch road of nitrogen header pipe 5 in the 3rd lift portion, above-mentioned second lift gas circulates in this second lift branch road.3rd promotes control section 14 controls the 3rd pressure-difference valve 40 aperture according to the second material level value and the 3rd pressure difference, namely control the operational throughput of nitrogen in the second lift branch road in the 3rd lift portion, adjustable is carried the internal circulating load of catalyzer to the 3rd riser 9 by two anti-bottom hoppers 39.
Particularly, the 3rd lifting control section 14 judges that whether this second material level value is higher than a material level preset value.When the second material level value is higher than material level preset value, the aperture of the 3rd pressure-difference valve 40 is adjusted under promoting the control of control section 14 the 3rd, thus adjustment catalyzer is delivered to the internal circulating load of three anti-top hoppers 45 by the 3rd riser 9, the material level of catalyzer in two anti-top hoppers 38 is declined, moves closer to this material level preset value.And when the second material level value is lower than this material level preset value, 3rd promotes the aperture that control section 14 adjusts the 3rd pressure-difference valve 40, to adjust catalyzer to be delivered to three anti-top hoppers 45 internal circulating load by the 3rd riser 9, make this second material level value close to this material level preset value.
3rd promotes control section 14 controls the 3rd flow control valve 44 aperture according to the 3rd flow value obtained from the 3rd flowmeter 43, carry to the 3rd riser 9 flow once promoting gas to control nitrogen header pipe 5, by adjustment once promote the flow of gas number control the flowing velocity of the 3rd riser 9 inner catalyst.
As shown in Figure 6, the 4th promotes control section 15 is connected respectively with the 3rd reactor 4 and nitrogen header pipe 5, and particularly, three anti-top hopper the 45, the 3rd reactors 4 and three anti-bottom hoppers 46 are connected successively by delivery pipe.The delivery outlet of above-mentioned three anti-bottom hoppers 46 is connected with the input port of the regenerator top surge tank 16 of regenerator 1 by the 4th riser 10.
The 4th pressure-difference valve 47 is provided with between nitrogen header pipe 5 and the 4th riser 10,4th promotes control section 15 is connected respectively with one the 3rd level-sensing device 48, the 4th pressure difference test meter 49 and the 4th pressure-difference valve 47,3rd level-sensing device 48 is arranged on three anti-top hoppers 45, in order to detect the 3rd material level value of catalyzer in three anti-top hoppers 45.4th pressure difference test meter 49 is arranged between nitrogen header pipe 5 and regenerator top surge tank 16, to detect the 4th pressure difference between nitrogen header pipe 5 and regenerator top surge tank 16.4th promotes control section 15 is connected that (the gas transmission path that the 4th flowmeter 50 and the 4th flow control valve 51 are formed can be described as the once lifting branch road of nitrogen header pipe 5 in the 4th lift portion respectively with the 4th flowmeter 50 be arranged in nitrogen header pipe 5 and the 4th flow control valve 51, above-mentioned once lifting gas once promotes in branch road at this and circulates), 4th flow control valve 51 and the 4th pressure-difference valve 47 are positioned at the different branch of nitrogen header pipe 5, 4th pressure-difference valve 47 is arranged in the second lift branch road of nitrogen header pipe 5 in the 4th lift portion, above-mentioned second lift gas circulates in this second lift branch road.4th promotes control section 15 controls the 4th pressure-difference valve 47 aperture according to the 3rd material level value and the 4th pressure difference, namely control the operational throughput of nitrogen in the second lift branch road in the 4th lift portion, adjustable is carried the internal circulating load of catalyzer to the 4th riser 10 by three anti-bottom hoppers 46.
Particularly, the 4th lifting control section 15 judges that whether the 3rd material level value is higher than a material level preset value.When the 3rd material level value is higher than material level preset value, the aperture adjusting the 4th pressure-difference valve 47 under control section 15 controls is promoted the 4th, thus adjustment catalyzer is delivered to the internal circulating load of regenerator top surge tank 16 by the 4th riser 10, the material level of catalyzer in three anti-top hoppers 45 is declined, moves closer to this material level preset value.And when the 3rd material level value is lower than this material level preset value, 4th promotes the aperture that control section 15 adjusts the 4th pressure-difference valve 47, to adjust catalyzer to be delivered to regenerator top surge tank 16 internal circulating load by the 4th riser 10, make the 3rd material level value close to this material level preset value.
4th promotes control section 15 controls the 4th flow control valve 51 aperture according to the 4th flow value obtained from the 4th flowmeter 50, carry to the 4th riser 10 flow once promoting gas to control nitrogen header pipe 5, by adjustment once promote the flow of gas number control the flowing velocity of the 4th riser 10 inner catalyst.
In the specific implementation, above-mentioned second promotes control section 13, 3rd promotes control section 14 and the 4th promotes material level value that control section 15 receives according to respective correspondence and in fact pressure difference belongs to serials control to the control that pressure-difference valve carries out, that is: the differential pressure control valve on second lift air pipe regulates under the acting in conjunction of differential pressure value and material level value, and when the first lifting control section 12, second promotes control section 13, when the 3rd a certain lifting control section promoted in control section 14 and the 4th lifting control section 15 detects that catalyzer lifting process is in abnormal operating conditions (material level in such as top hopper is too low), promote the lifting process stopping that control section controls catalyzer.Now pressure-difference valve is forced closed, and pressure reduction controls to be forced to become manual mode, and output is 0.When process reverts back to be hoisted is normal, just can continue the lifting process of catalyzer.
By the movable bed catalyst cyclic regeneration control system of example of the present invention, the various factors (material level in device, pressure reduction etc.) in the reprocessing cycle of movable bed catalyst can be considered, the mutual Collaboration of each control procedure, make the cyclic regeneration cyclic process of catalyzer safer, stable, the durations of the cyclic regeneration cyclic process of extending catalyst.
In actual applications, for ensureing the normal execution of continuous catalyst regenerating cyclic process further, in the movable bed catalyst cyclic regeneration control system of example of the present invention, be also provided with sealing control module and control to the sealing realized in catalyst regeneration cycle process.The object that catalyst seal controls prevents the oxygen-containing gas in regenerator by promoting and feed gas.Sealing control module is for the Secure isolation of the oxygen environment of the hydrogen environment and regenerator that carry out reactor, in specific implementation process, sealing control module mainly comprises: regenerator bottoms sealing control section, regenerator memory block sealing control section, anti-top hopper sealing control section, nitrogen-sealed tank and a contrast means of press seals control section and three anti-bottom hoppers seal control part and grade, wherein:
A) regenerator bottoms sealing control section changes according to the differential pressure between regenerator 1 and regenerator bottom hopper 18 sealing carrying out regenerator bottoms and controls; As shown in Figure 3, nitrogen header pipe 5 is connected with the input port of regenerator bottom hopper 18 by one the 5th pressure-difference valve 53, one the 5th pressure difference test meter 52 is connected to bottom regenerator 1 and nitrogen header pipe 5 is connected between the gas transmission line of hopper 18 input port, regenerator bottom, in order to measure the 5th pressure difference between regenerator 1 and regenerator bottom hopper 18.This regenerator bottoms sealing control section is connected with the 5th pressure difference test meter 52 and the 5th pressure-difference valve 53 respectively, to obtain the 5th above-mentioned pressure difference from the 5th pressure difference test meter 52, and controls the aperture of the 5th pressure-difference valve 53 according to the 5th pressure difference.
Particularly, the aperture of the 5th pressure-difference valve 53 is controlled according to the 5th pressure difference, refer to: regenerator bottoms sealing control section judges the default pressure difference whether the 5th pressure difference reaches above-mentioned, if the 5th pressure difference does not reach this default pressure difference, the aperture of regenerator bottoms sealing control section adjustment the 5th pressure-difference valve 53, to increase the nitrogen amount that nitrogen header pipe 5 is injected to regenerator bottom hopper 18, thus the pressure increased in regenerator bottom hopper 18, until the 5th pressure difference returns to this default pressure difference, scurry under the effect of the pressure in the first reactor 2 to prevent the oxygen in regenerator 1.
B) sealing that sealing control section in regenerator memory block carries out regenerator 1 top memory district according to the differential pressure change of internal regenerator controls; As shown in Figure 7, in the position of above-mentioned regenerator 1, one the 6th pressure difference test meter 54 be arranged at burn unstripped gas admission line and regenerator 1 top memory district between, in order to obtain burn unstripped gas admission line and regenerator 1 top memory district between the 6th pressure difference.Nitrogen header pipe 5 is connected with the top memory district of regenerator 1 by one the 6th pressure-difference valve 55, with to supplying nitrogen in the top memory district of regenerator 1.Above-mentioned regenerator memory block sealing control section is connected with the 6th above-mentioned pressure difference test meter 54 and the 6th pressure-difference valve 55 respectively, to obtain the 6th pressure difference from the 6th pressure difference test meter 54, and control the aperture of the 6th pressure-difference valve 55 according to the 6th pressure difference.
Particularly, the aperture of the 6th pressure-difference valve 55 is controlled according to the 6th pressure difference, refer to: this regenerator memory block sealing control section judges the default pressure difference whether the 6th pressure difference reaches above-mentioned, if the 6th pressure difference does not reach this default pressure difference, the aperture of regenerator memory block sealing control section adjustment the 6th pressure-difference valve 55, to increase the nitrogen amount that nitrogen header pipe 5 is injected to the top memory district of regenerator 1, thus increase the pressure in the top memory district of regenerator 1, until the 6th pressure difference returns to this default pressure difference, thus prevent burning unstripped gas and scurry under the effect of the pressure in the top memory district of regenerator 1.
C) sealing that an anti-top hopper sealing control section changes according to an anti-top hopper 30 of the first reactor 2 and the differential pressure of nitrogen-sealed tank 37 the anti-top hopper 30 carrying out the first reactor 2 controls; As shown in Figure 4, in order to prevent in the first reactor 2 unstripped gas, through nitrogen-sealed tank 37, (nitrogen-sealed tank 37 also seals self, thus form sealing dual fail-safe) enter an anti-top hopper 30, simultaneously in order to enable catalyzer fall smoothly, the pressure of one anti-top hopper 30 should (such as, an anti-top hopper 30 remains on 0.15kg/cm with the pressure reduction of nitrogen-sealed tank 37 higher than the pressure of nitrogen-sealed tank 37
2).Differential pressure between one anti-top hopper 30 and nitrogen-sealed tank 37 is controlled by an anti-top hopper dust collection bleed off pipeline variable valve 67.This anti-top hopper dust collection bleed off pipeline variable valve 67 is connected in an airborne release pipeline, and this airborne release pipeline one end is connected to the input port of an anti-top hopper 30, and the other end is disposed to air safe place (ATM).A differential pressure transmitter 69 is provided with between an anti-top hopper 30 and nitrogen-sealed tank 37, to detect the differential pressure between an anti-top hopper 30 and nitrogen-sealed tank 37, regulate the aperture of this top hopper dust collection bleed off pipeline variable valve 67 according to the differential pressure measuring information of this differential pressure transmitter 69 detection, adjust the differential pressure between an anti-top hopper 30 and nitrogen-sealed tank 37.
D) nitrogen-sealed tank and a contrast means of press seals control section change the differential pressure of carrying out the first reactor 2 according to the differential pressure between nitrogen-sealed tank 37 and the first reactor 2 and seal and control; As shown in Figure 4, nitrogen-sealed tank 37 is upwards scurried in order to prevent the inner unstripped gas of the first reactor 2, nitrogen-sealed tank 37 pressure should (such as, the pressure reduction of nitrogen-sealed tank 37 and the first reactor 2 remains on 0.1kg/cm a little more than the internal pressure of the first reactor 2
2), particularly, nitrogen-sealed tank and a contrast means of press seals control section are controlled by the variable valve 66 on the flare discharge pipeline of nitrogen-sealed tank 37 and nitrogen intake line.
E) sealing that three anti-bottom hoppers sealing control sections change according to the differential pressure of the lifting gas of three anti-bottom hoppers 46 of the 3rd reactor 4 and three anti-bottom hoppers 46 of the 3rd reactor 4 the three anti-bottom hoppers carrying out the 3rd reactor 4 controls; As shown in Figure 3 and Figure 6, in order to avoid pressure instability causes the fluctuation of the 4th lift portion, the pressure of three anti-bottom hoppers 46 of the 3rd reactor 4 should (such as, the pressure of three anti-bottom hoppers 46 and the 4th pressure reduction promoting the pressure of gas remain on 0.15kg/cm a little more than promoting atmospheric pressure
2).Differential pressure between the second lift branch road of three anti-bottom hoppers 46 and the 4th lift portion is controlled by regenerator top hopper dust collection bleed off pipeline variable valve 68.This regenerator top hopper dust collection bleed off pipeline variable valve 68 is connected in an airborne release pipeline, and this airborne release pipeline one end is connected to the input port of regenerator top surge tank 16, and the other end is disposed to air safe place (ATM).A differential pressure transmitter 70 is provided with between the second lift branch road of three anti-bottom hoppers 46 and the 4th lift portion, with the differential pressure between the second lift branch road detecting three anti-bottom hoppers 46 and the 4th lift portion, the aperture of this top hopper dust collection bleed off pipeline variable valve 68 is regulated, the differential pressure between the second lift branch road adjusting three anti-bottom hoppers 46 and the 4th lift portion according to the differential pressure measuring information that this differential pressure transmitter 70 detects.
In one example, in the movable bed catalyst cyclic regeneration control system of example of the present invention, also include pressure control unit, this pressure control unit mainly comprises: the differential pressure control section between the section of burning and balancing segment and regenerator circulating pressure control section, wherein:
A) the differential pressure control section between the section of burning and balancing segment changes according to the differential pressure between regenerator 1 section of burning and balancing segment and controls Balance Air outlet conduit control valve opening.
As shown in Figure 7, in the position of above-mentioned regenerator 1, between the section of burning that one the 7th pressure difference test meter 56 is connected to regenerator 1 and balancing segment, to obtain the 7th pressure difference between the section of burning of regenerator 1 and balancing segment.One Balance Air escape pipe 57 exports with the Balance Air of regenerator 1 and is connected, and Balance Air escape pipe 57 is provided with one the 7th pressure-difference valve 58.Differential pressure control section between the above-mentioned section of burning with balancing segment is connected with the 7th pressure difference test meter 56 and the 7th pressure-difference valve 58 respectively, to obtain the 7th pressure difference from the 7th pressure difference test meter 56, and control the aperture of the 7th pressure-difference valve 58 according to the 7th pressure difference.
Particularly, the aperture of the 7th pressure-difference valve 58 is controlled according to the 7th pressure difference, refer to: the differential pressure control section between the above-mentioned section of burning and balancing segment judges whether the 7th pressure difference reaches this default pressure difference, if the 5th pressure difference does not reach this default pressure difference, differential pressure control section between the section of burning and balancing segment controls the aperture of the 7th pressure-difference valve 58, the gas of balancing segment is discharged by the 7th pressure-difference valve 58, to reduce the pressure of balancing segment, until the 7th pressure difference returns to this default pressure difference, thus ensure that catalyzer in regenerator 1 can enter to balancing segment under the combined action of pressure and gravity from the section of burning.
B) regenerator circulating pressure control section controls the aperture of variable valve on balancing segment nitrogen pipeline according to the differential pressure of the entrance of regenerator 1 balancing segment nitrogen pipeline and the first reactor 2.
As shown in Figure 7, in the position of above-mentioned regenerator 1, nitrogen header pipe 5 is connected with the Balance Air entrance of the balancing segment of regenerator 1 by one the 8th pressure-difference valve 59, with to balancing segment supplying nitrogen.The 8th pressure difference test meter 60 is provided with, to obtain the 8th pressure difference between the first reactor 2 and Balance Air entrance between the first reactor 2 and Balance Air entrance.Above-mentioned regenerator circulating pressure control section is connected respectively with the 8th pressure difference test meter 60 and the 8th pressure-difference valve 59, to obtain the 8th pressure difference from the 8th pressure difference test meter 60, and control the aperture of the 8th pressure-difference valve 59 according to the 8th pressure difference.
Particularly, the aperture of the 8th pressure-difference valve 59 is controlled according to the 8th pressure difference, refer to: regenerator circulating pressure control section judges whether the 8th pressure difference reaches this default pressure difference, if the 5th pressure difference does not reach this default pressure difference, regenerator circulating pressure control section regulates the aperture of the 8th differential pressure control valve 59, to increase the nitrogen amount that nitrogen header pipe 5 is injected to the balancing segment of regenerator 1, thus increase the pressure of the balancing segment of regenerator 1, until the 8th pressure difference returns to this default pressure difference, thus ensure the pressure of pressure higher than reactive moieties of regenerating section, make the catalyzer normal circulation in the first lift portion.
In one example, the movable bed catalyst cyclic regeneration control system of example of the present invention also comprises: reaction gas conveyance conduit, as shown in Figure 1, this reaction gas conveyance conduit comprises: the reaction gas draft tube 61 being connected to the air intake opening of the first reactor 2, first reactor 2, be connected to the reaction gas delivery pipe 62 between the first reactor 2 and the second reactor 3, second reactor 3, be connected to the reactor delivery pipe 63 between the second reactor 3 and the 3rd reactor 4, 3rd reactor 4 and be connected to the reaction gas escape pipe 64 of gas outlet of the 3rd reactor 4, and, this reaction gas draft tube 61 is connected with a reaction gas air intake device 65, reaction gas air intake device 65 is for this reaction gas conveyance conduit transport of reactant gases.By this reaction gas conveyance conduit, make reacting gas successively by the first above-mentioned reactor 2, second reactor 3 and the 3rd reactor 4, react under making the effect of reacting gas respectively at catalyzer in the first reactor 2, second reactor 3 and the 3rd reactor 4.
By above-mentioned sealing control and Stress control, the running environment in movable bed catalyst regeneration cycle process can be considered more all sidedly, thus improve the stability of catalyst regeneration cycle process.And owing to considering multiple influence factors of movable bed catalyst regeneration cycle process, the durations of catalyst regeneration cycle process can be made longer, thus meet the demand of the techniques such as long moving bed aromatic hydrocarbons, alkene.
Above-described instantiation; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only instantiation of the present invention; the protection domain be not intended to limit the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. a movable bed catalyst cyclic regeneration control system BRCS, for controlling the continuous catalyst regenerating cyclic process of movable bed catalyst regenerating unit;
Described movable bed catalyst regenerating unit comprises: regenerator, regenerator top surge tank, locking hopper, regenerator bottom hopper, the first reactor, the second reactor, the 3rd reactor, reactor top hopper, nitrogen-sealed tank, reactor lower part hopper;
Movable bed catalyst regenerating unit is provided with pressure instrumentation, level sensing instrument, flow instrumentation and by-pass valve control;
It is characterized in that, described movable bed catalyst cyclic regeneration control system BRCS comprises: loading and unloading control module, lifting control module, sealing control module and pressure control unit, wherein,
Described loading and unloading control module controls the loading and unloading process of catalyzer in regenerating unit according to the material-level measure information of catalyzer in the pressure detection information of regenerating unit and regenerating unit;
Described loading and unloading process comprises:
A) catalyzer falls to the loading process of locking hopper from regenerator top surge tank; And
B) catalyzer falls to the uninstall process in the top memory district of regenerator from locking hopper;
Described lifting control module is for controlling the circulation course of conveying of catalyzer between regenerator, the first reactor, the second reactor and the 3rd reactor, lifting control module comprises: first promotes control section, second promotes control section, the 3rd lifting control section and the 4th lifting control section, wherein
Described first promotes control section controls the conveying of catalyzer from regenerator to the first reactor, second promotes control section controls the conveying of catalyzer from the first reactor to the second reactor, 3rd promotes control section controls catalyzer from the second reactor to the conveying of the 3rd reactor, and the 4th promotes control section controls catalyzer from the 3rd reactor to the conveying of regenerator;
Described sealing control module is for the Secure isolation of the oxygen environment of the hydrogen environment and regenerator that carry out reactor, sealing control module comprises: regenerator memory block sealing control section, regenerator bottoms sealing control section, anti-top hopper sealing control section, nitrogen-sealed tank and a contrast means of press seals control section and three anti-bottom hoppers seal control section, wherein
A) sealing that sealing control section in regenerator memory block carries out regenerator memory block according to the differential pressure change of internal regenerator controls;
B) regenerator bottoms sealing control section changes according to the differential pressure between regenerator and regenerator bottom hopper the sealing carrying out regenerator bottoms and controls;
C) sealing that an anti-top hopper sealing control section changes according to the top hopper of the first reactor and the differential pressure of nitrogen-sealed tank the top hopper carrying out the first reactor controls;
D) nitrogen-sealed tank and a contrast means of press seals control section change the differential pressure of carrying out the first reactor according to the differential pressure between nitrogen-sealed tank and the first reactor and seal and control;
E) sealing that three anti-bottom hoppers sealing control sections change according to the differential pressure of the lifting gas of the bottom hopper of the bottom hopper of the 3rd reactor and the 3rd reactor the bottom hopper carrying out the 3rd reactor controls;
Described pressure control unit comprises: regenerator circulating pressure control section and the differential pressure control section between the section of burning and balancing segment, wherein,
A) regenerator circulating pressure control section controls the aperture of variable valve on balancing segment nitrogen pipeline according to the differential pressure of the entrance of regenerator balancing segment nitrogen pipeline and the first reactor;
B) the differential pressure control section between the section of burning and balancing segment controls Balance Air outlet conduit control valve opening according to the differential pressure change between the regenerator section of burning and balancing segment.
2. movable bed catalyst cyclic regeneration control system BRCS according to claim 1, is characterized in that,
A) described loading process comprises:
Catalyst valve and air sealing valve is provided with between described regenerator top surge tank and locking hopper, loading and unloading control module obtains material level value by the material-level measure meter be arranged on regenerator top surge tank and locking hopper, obtains the differential pressure value between regenerator top surge tank and locking hopper by the pressure unit be arranged on regenerator top surge tank and locking hopper; Loading and unloading control module controls the on off state of catalyst valve and the air sealing valve be arranged between regenerator top surge tank and locking hopper according to described material level value and differential pressure value, to control catalyzer to fall to locking hopper loading process from regenerator top surge tank;
B) described uninstall process comprises:
Catalyst valve and air sealing valve is provided with between described locking hopper and regenerator, loading and unloading control module obtains material level value by the material-level measure meter be arranged on locking hopper and regenerator, obtains the differential pressure value between locking hopper and regenerator by the pressure unit be arranged on locking hopper and regenerator; Loading and unloading control module controls the on off state of catalyst valve and the air sealing valve be arranged between locking hopper and regenerator according to described material level value and differential pressure value, to control catalyzer to fall to the top memory district of regenerator uninstall process from locking hopper.
3. movable bed catalyst cyclic regeneration control system BRCS according to claim 1, is characterized in that, described lifting control module controls the circulation course of conveying of catalyzer between regenerator, the first reactor, the second reactor and the 3rd reactor, wherein,
Total lifting gas is divided into two parts: once promote gas, determines catalyst circulation rate; Second lift gas, makes catalyst fluidization; By changing the total flow velocity of flow control catalyzer in pipe promoting gas;
Described first promotes control section, controls the aperture of the differential pressure control valve in second lift feed channel, to control the internal circulating load of the first lifting catalyzer according to the differential pressure between second lift gas and an anti-top hopper; Total stability of flow promoting gas is ensured, to control the flowing velocity of the first lifting catalyzer by controlling once to promote gas variable valve;
Described second promotes control section, controls the aperture of the differential pressure control valve in second lift feed channel, to control the internal circulating load of the second lifting catalyzer according to the differential pressure between second lift gas and two anti-top hoppers; Total stability of flow promoting gas is ensured, to control the flowing velocity of the second lifting catalyzer by controlling once to promote gas variable valve;
Described 3rd promotes control section, controls the aperture of the differential pressure control valve in second lift feed channel according to the differential pressure between second lift gas and three anti-top hoppers, to control the internal circulating load that the 3rd promotes catalyzer; Total stability of flow promoting gas is ensured, to control the flowing velocity that the 3rd promotes catalyzer by controlling once to promote gas variable valve;
Described 4th promotes control section, controls the aperture of the differential pressure control valve in second lift feed channel according to the differential pressure between second lift gas and regenerator top surge tank, to control the internal circulating load that the 4th promotes catalyzer; Total stability of flow promoting gas is ensured, to control the flowing velocity that the 4th promotes catalyzer by controlling once to promote gas variable valve.
4. movable bed catalyst cyclic regeneration control system BRCS according to claim 1, it is characterized in that, described sealing control module guarantees the Secure isolation of the high-tension apparatus of reactive moieties and the low-voltage equipment of regenerating section, guarantee the Secure isolation of the hydrogen environment of reactive moieties and the oxygen environment of regenerating section, wherein
A) regenerator memory block sealing control section specifically for:
Described nitrogen pipeline is provided with differential pressure control valve to the connecting tube on regenerator top, sealing control section in regenerator memory block obtains differential pressure value by the differential pressure transmitter be arranged between regenerator memory block and the regenerator section of burning, and control nitrogen pipeline control valve opening according to this differential pressure value, remain on preset value to make this differential pressure value;
B) regenerator bottoms sealing control section specifically for:
Described nitrogen pipeline establishes differential pressure control valve to the connecting tube of regenerator bottom hopper, regenerator bottoms sealing control section obtains differential pressure value by the differential pressure transmitter be arranged between regenerator bottoms and regenerator bottom hopper nitrogen pipeline, and the aperture of nitrogen pipeline variable valve is controlled according to this differential pressure value, remain on preset value to make this differential pressure value;
C) an anti-top hopper sealing control section specifically for:
A nitrogen-sealed tank is provided with between the top hopper and the first reactor of described first reactor, one anti-top hopper sealing control section obtains differential pressure value by the differential pressure transmitter be arranged between an anti-top hopper and nitrogen-sealed tank, control the aperture of the dust collection bleed off pipeline variable valve of an anti-top hopper according to this differential pressure value, remain on preset value to make this differential pressure value;
D) nitrogen-sealed tank and a contrast means of press seals control section specifically for:
Obtain differential pressure value by the differential pressure transmitter be arranged between nitrogen-sealed tank and the first reactor, according to the aperture of this differential pressure value Staged cotrol nitrogen-sealed tank flare discharge pipeline variable valve and nitrogen pipeline variable valve, remain on preset value to make this differential pressure value;
E) three anti-bottom hoppers sealing control sections specifically for:
Obtain differential pressure value by the differential pressure transmitter be arranged between the 3rd reactor and the 4th riser, control the aperture of regenerator top hopper dust collection bleed off pipeline variable valve according to this differential pressure value, remain on preset value to make this differential pressure value.
5. movable bed catalyst cyclic regeneration control system BRCS according to claim 1, is characterized in that,
A) regenerator circulating pressure control section specifically for:
The balancing segment nitrogen pipeline of described regenerator arranges differential pressure control valve, regenerator circulating pressure control section obtains differential pressure value by the differential pressure transmitter of regenerator balancing segment nitrogen pipeline and an anti-entrance, control the aperture of differential pressure control valve according to this differential pressure value, remain on preset value to make this differential pressure value;
B) the differential pressure control section between the section of burning and balancing segment specifically for:
The Balance Air pipeline of described regenerator arranges differential pressure control valve, differential pressure control section between the section of burning and balancing segment obtains differential pressure value by the differential pressure transmitter between the internal regenerator section of burning and balancing segment, control the aperture of differential pressure control valve according to this differential pressure value, remain on preset value to make this differential pressure value.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113608430A (en) * | 2021-07-08 | 2021-11-05 | 北京康吉森自动化技术股份有限公司 | Continuous reforming catalyst regeneration CRCS control system of UOP |
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| EP0413857A1 (en) * | 1988-05-11 | 1991-02-27 | Uop | Catalyst regeneration with reduced thermal damage |
| CN101391234A (en) * | 2008-10-30 | 2009-03-25 | 石宝珍 | Catalyst multistage regeneration method and device |
| CN104437674A (en) * | 2014-11-27 | 2015-03-25 | 浙江大学 | Regenerating method of catalytic conversion catalyst |
| CN204320324U (en) * | 2014-10-10 | 2015-05-13 | 中石化广州工程有限公司 | A kind of molecular sieve catalyst moving bed cyclic regeneration device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP0413857A1 (en) * | 1988-05-11 | 1991-02-27 | Uop | Catalyst regeneration with reduced thermal damage |
| CN101391234A (en) * | 2008-10-30 | 2009-03-25 | 石宝珍 | Catalyst multistage regeneration method and device |
| CN204320324U (en) * | 2014-10-10 | 2015-05-13 | 中石化广州工程有限公司 | A kind of molecular sieve catalyst moving bed cyclic regeneration device |
| CN104437674A (en) * | 2014-11-27 | 2015-03-25 | 浙江大学 | Regenerating method of catalytic conversion catalyst |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113608430A (en) * | 2021-07-08 | 2021-11-05 | 北京康吉森自动化技术股份有限公司 | Continuous reforming catalyst regeneration CRCS control system of UOP |
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