CN111589176A - Semi-circulating FCC catalyst spray drying system - Google Patents
Semi-circulating FCC catalyst spray drying system Download PDFInfo
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- CN111589176A CN111589176A CN202010466437.XA CN202010466437A CN111589176A CN 111589176 A CN111589176 A CN 111589176A CN 202010466437 A CN202010466437 A CN 202010466437A CN 111589176 A CN111589176 A CN 111589176A
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- Prior art keywords
- tail gas
- fcc catalyst
- spray drying
- spray
- drying tower
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- 238000001694 spray drying Methods 0.000 title claims abstract description 53
- 239000003054 catalyst Substances 0.000 title claims abstract description 51
- 239000007789 gas Substances 0.000 claims abstract description 45
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000001035 drying Methods 0.000 claims abstract description 12
- 239000003345 natural gas Substances 0.000 claims abstract description 8
- 238000003860 storage Methods 0.000 claims abstract description 6
- 239000008188 pellet Substances 0.000 claims description 17
- 239000012159 carrier gas Substances 0.000 claims description 12
- 239000002002 slurry Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 239000007921 spray Substances 0.000 claims description 10
- 238000000926 separation method Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 239000011324 bead Substances 0.000 claims 1
- 238000010992 reflux Methods 0.000 abstract description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 239000003546 flue gas Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 3
- 238000000889 atomisation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004523 catalytic cracking Methods 0.000 description 1
- 238000009690 centrifugal atomisation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/16—Evaporating by spraying
- B01D1/18—Evaporating by spraying to obtain dry solids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/0011—Heating features
- B01D1/0041—Use of fluids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/16—Evaporating by spraying
- B01D1/20—Sprayers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/30—Accessories for evaporators ; Constructional details thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/143—Reduction of greenhouse gas [GHG] emissions of methane [CH4]
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a semi-circulating FCC catalyst spray drying system, which comprises a hot blast stove, a spray drying tower, a storage bin, a self-separator, a circulating fan and a draught fan, wherein a natural gas inlet, an air inlet, a tail gas inlet I and a tail gas inlet II for introducing reflux drying tail gas are arranged on the hot blast stove; a tail gas discharge pipeline is connected to the self-separator, and an induced draft fan is arranged on the tail gas discharge pipeline; the invention can recycle the heat of the tail gas and reduce the tail gas emission, thereby reducing the specification of subsequent tail gas treatment equipment and reducing the investment; meanwhile, the amount of the circulating tail gas can be flexibly adjusted, the outlet temperature of the product is controlled, and the device has the advantages of convenience in operation, high heat exchange efficiency, large operation elasticity and the like.
Description
Technical Field
The invention relates to the technical field of industrial catalytic cracking catalyst preparation process flow and energy conservation, in particular to a semi-circulating FCC catalyst spray drying system.
Background
In the FCC catalyst device, a drying unit adopts a spray drying tower to pre-dry FCC catalyst slurry, the drying mode belongs to hot air type drying, the temperature of tail gas can reach 180 ℃ at most, the heat quantity taken away by the direct emission of the tail gas is higher, and the heat loss is more. The single production line of the traditional FCC catalyst device in China has small capacity, and the drying unit still adopts a spray drying tower to pre-dry FCC catalyst slurry along with the large-scale development of the FCC catalyst device at present, and because the capacity is enlarged, if an open process technology with single tail gas emission is adopted, the waste heat taken away by the tail gas is more, and the heat loss is more serious. In order to meet the technical requirements of the existing energy-saving and environment-friendly process, an energy-saving process scheme is required.
Therefore, the design of a reasonable, simple and efficient drying process is required, and the urgent need in the field is provided.
Disclosure of Invention
The invention aims to provide a semi-circulating FCC catalyst spray drying system, which is used for solving the problems in the prior art, recycling the heat of tail gas, reducing the tail gas emission, reducing the specification of subsequent tail gas treatment equipment and reducing the investment; meanwhile, the amount of the circulating tail gas can be flexibly adjusted, the outlet temperature of the product is controlled, and the device has the advantages of convenience in operation, high heat exchange efficiency, large operation elasticity and the like.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a semi-circulating FCC catalyst spray drying system, which comprises a hot blast stove, a spray drying tower, a storage bin, a self-separator, a circulating fan and a draught fan, wherein a natural gas inlet for introducing natural gas, an air inlet for introducing combustion air, a tail gas inlet I for introducing roasting tail gas and a tail gas inlet II for introducing reflux drying tail gas are arranged on the hot blast stove, the tail gas inlet II is connected with the self-separator through a reflux pipeline, a mixed carrier gas outlet is also arranged on the hot blast stove, the mixed carrier gas outlet is connected with the spray drying tower through a pipeline, FCC catalyst droplet pellets formed by atomizing FCC catalyst slurry are introduced into the spray drying tower, the spray drying tower is connected with the self-separator through a pipeline, and the bottom of the spray drying tower is connected with the storage bin; the automatic separator is connected with a tail gas discharge pipeline, a draught fan is arranged on the tail gas discharge pipeline, and a material outlet is further formed in the bottom of the automatic separator.
Preferably, the mixed carrier gas outlet is arranged at the top of the hot blast stove.
Preferably, the mixed carrier gas is introduced from the top of the spray drying tower.
Preferably, a spray nozzle is arranged at the top of the spray drying tower, and the FCC catalyst slurry from the previous process is atomized by the spray nozzle under 2-20 MPa to form FCC catalyst droplet pellets which are sprayed into the cylinder of the spray drying tower.
Preferably, the top of the spray drying tower is provided with a spray nozzle, and FCC catalyst slurry from the previous process is centrifugally atomized to form FCC catalyst droplet pellets which are sprayed into the cylinder of the spray drying tower.
Compared with the prior art, the invention has the following beneficial technical effects:
according to the semi-circulating FCC catalyst spray drying system provided by the invention, high-temperature flue gas is used as a drying heat source, and the dried tail gas is recycled, so that the emission of the tail gas is reduced while the heat of the part of the discharged flue gas is recovered, the specification of subsequent tail gas treatment equipment is reduced, and the investment is reduced; meanwhile, the amount of the circulating tail gas can be flexibly adjusted, the outlet temperature of the product is controlled, and the device has the advantages of convenience in operation, high heat exchange efficiency, large operation elasticity and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of a semi-cycle FCC catalyst spray-drying system according to the present invention;
in the figure: 1-hot blast stove, 2-spray drying tower, 3-bunker, 4-self-separator, 5-circulating fan, 6-induced draft fan and 7-spray head.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a semi-circulating FCC catalyst spray drying system to solve the problems in the prior art.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The semi-circulating FCC catalyst spray drying system in this embodiment, as shown in fig. 1, comprises a hot-blast stove 1, a spray drying tower 2, a storage bin 3, a self-separator 4, a circulating fan 5 and a draught fan 6, wherein the hot-blast stove 1 is provided with a natural gas inlet for introducing natural gas, an air inlet for introducing combustion air, a first tail gas inlet for introducing roasting tail gas and a second tail gas inlet for introducing reflux drying tail gas, the tail gas inlet II is connected with the self-separator 4 through a return pipeline, the top of the hot blast stove 1 is also provided with a mixed carrier gas outlet, the mixed carrier gas outlet is connected with the spray drying tower 2 through a pipeline, the mixed carrier gas is introduced from the top of the spray drying tower 2, FCC catalyst droplet balls formed by the atomization of FCC catalyst slurry are introduced into the spray drying tower 2, the spray drying tower 2 is connected with the self-separator 4 through a pipeline, and the bottom of the spray drying tower 2 is connected with the stock bin 3; be connected with the exhaust emission pipeline on the self-separation ware 4, be provided with draught fan 6 on the exhaust emission pipeline, still be provided with the material export from the bottom of separator 4.
In the embodiment, the top of the spray drying tower 2 is provided with a spray nozzle 7, and the FCC catalyst slurry from the previous process is atomized by the spray nozzle 7 under 2-20 MPa to form FCC catalyst droplet pellets which are sprayed into the cylinder of the spray drying tower 2; or, the FCC catalyst slurry forms FCC catalyst fog drop pellets after centrifugal atomization, and the FCC catalyst fog drop pellets are sprayed into the cylinder of the spray drying tower 2.
The specific implementation method of the semi-circulating FCC catalyst spray-drying system provided in this embodiment is as follows:
combustion-supporting air and natural gas enter the hot blast stove 1 to be combusted to generate high-temperature flue gas; the tail gas from the roasting system is about 600 ℃, and the dried tail gas which is about 100 percent of the emission is recycled by the circulating fan 5 after being dried is about 180 ℃, and the dried tail gas enters the furnace body from the front end and the rear end of the hot blast furnace 1 respectively, is mixed with the high-temperature flue gas generated in the hot blast furnace 1 at the tail part of the hot blast furnace 1 to be used as the mixed carrier gas of the drying system, and enters the spray drying tower 2.
FCC catalyst slurry 19m from upstream process3Uniformly atomizing to form FCC catalyst droplet pellets by a spray head 7 under the pressure of 2-20 MPa (G), and spraying the FCC catalyst droplet pellets into a cylinder body of a spray drying tower 2; meanwhile, mixed carrier gas generated by the hot air furnace 1 also enters the spray drying tower 2 and is fully contacted with the atomized FCC catalyst droplet pellets, and moisture in the FCC catalyst droplet pellets is vaporized to form FCC catalyst pellets so as to achieve the aim of drying materials.
Large particles in the dried FCC catalyst pellets fall into the bottom of the spray drying tower 2 by means of self weight and are collected into a large particle bin 3; the other small particles in the FCC catalyst pellets enter a separator along with hot air, and the collected FCC catalyst pellets are sent to a subsequent system as a product; the dry tail gas with the temperature of about 180 ℃ coming out of the separator 4 is divided into 2 paths, and one path of the dry tail gas enters the circulating fan 5 for pressurization and then enters the hot blast stove 1 to be recycled as secondary mixed temperature air; the other path enters a draught fan 6 for pressurization and then is discharged.
The principle and the implementation mode of the invention are explained by applying specific examples, and the description of the above examples is only used for helping understanding the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In summary, this summary should not be construed to limit the present invention.
Claims (5)
1. A semi-cycle FCC catalyst spray-drying system, characterized by: the self-separation device comprises a hot blast stove, a spray drying tower, a storage bin, a self-separation device, a circulating fan and an induced draft fan, wherein a natural gas inlet for introducing natural gas, an air inlet for introducing combustion air, a first tail gas inlet for introducing roasting tail gas and a second tail gas inlet for introducing backflow drying tail gas are arranged on the hot blast stove, the second tail gas inlet is connected with the self-separation device through a backflow pipeline, a mixed carrier gas outlet is also arranged on the hot blast stove and is connected with the spray drying tower through a pipeline, FCC catalyst droplet beads formed by atomizing FCC catalyst slurry are introduced into the spray drying tower, the spray drying tower is connected with the self-separation device through a pipeline, and the bottom of the spray drying tower is connected with the storage bin; the automatic separator is connected with a tail gas discharge pipeline, a draught fan is arranged on the tail gas discharge pipeline, and a material outlet is further formed in the bottom of the automatic separator.
2. The semi-circulating FCC catalyst spray-drying system of claim 1, wherein: the mixed carrier gas outlet is arranged at the top of the hot blast stove.
3. The semi-circulating FCC catalyst spray-drying system of claim 1, wherein: the mixed carrier gas is introduced from the top of the spray drying tower.
4. The semi-circulating FCC catalyst spray-drying system of claim 1, wherein: the top of the spray drying tower is provided with a spray head, and FCC catalyst slurry from the previous process is atomized by the spray head under 2-20 MPa to form FCC catalyst droplet pellets which are sprayed into the cylinder of the spray drying tower.
5. The semi-circulating FCC catalyst spray-drying system of claim 1, wherein: the top of the spray drying tower is provided with a spray head, FCC catalyst slurry from the previous process is centrifugally atomized to form FCC catalyst droplet pellets, and the FCC catalyst droplet pellets are sprayed into the cylinder of the spray drying tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010466437.XA CN111589176A (en) | 2020-05-28 | 2020-05-28 | Semi-circulating FCC catalyst spray drying system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010466437.XA CN111589176A (en) | 2020-05-28 | 2020-05-28 | Semi-circulating FCC catalyst spray drying system |
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| Publication Number | Publication Date |
|---|---|
| CN111589176A true CN111589176A (en) | 2020-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010466437.XA Pending CN111589176A (en) | 2020-05-28 | 2020-05-28 | Semi-circulating FCC catalyst spray drying system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113790589A (en) * | 2021-09-22 | 2021-12-14 | 新疆宜化化工有限公司 | Process and device for realizing energy-saving and efficient drying of carbide slag |
| CN115682638A (en) * | 2022-09-30 | 2023-02-03 | 天华化工机械及自动化研究设计院有限公司 | System for be used for dry FCC catalyst drying process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102000473A (en) * | 2010-11-26 | 2011-04-06 | 岳阳怡天化工有限公司 | Roast tail gas treatment method in production of catalytic cracking catalyst |
| CN103331026A (en) * | 2013-07-15 | 2013-10-02 | 天华化工机械及自动化研究设计院有限公司 | Automatic inertia type spray drying system |
| WO2016169174A1 (en) * | 2015-04-22 | 2016-10-27 | 厦门大学 | Multi-array monodisperse particle macro-spray drying system and application method thereof |
| CN212818169U (en) * | 2020-05-28 | 2021-03-30 | 中国石油化工股份有限公司 | Semi-circulating FCC catalyst spray drying system |
-
2020
- 2020-05-28 CN CN202010466437.XA patent/CN111589176A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102000473A (en) * | 2010-11-26 | 2011-04-06 | 岳阳怡天化工有限公司 | Roast tail gas treatment method in production of catalytic cracking catalyst |
| CN103331026A (en) * | 2013-07-15 | 2013-10-02 | 天华化工机械及自动化研究设计院有限公司 | Automatic inertia type spray drying system |
| WO2016169174A1 (en) * | 2015-04-22 | 2016-10-27 | 厦门大学 | Multi-array monodisperse particle macro-spray drying system and application method thereof |
| CN212818169U (en) * | 2020-05-28 | 2021-03-30 | 中国石油化工股份有限公司 | Semi-circulating FCC catalyst spray drying system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113790589A (en) * | 2021-09-22 | 2021-12-14 | 新疆宜化化工有限公司 | Process and device for realizing energy-saving and efficient drying of carbide slag |
| CN115682638A (en) * | 2022-09-30 | 2023-02-03 | 天华化工机械及自动化研究设计院有限公司 | System for be used for dry FCC catalyst drying process |
| CN115682638B (en) * | 2022-09-30 | 2024-10-01 | 中国石油化工股份有限公司 | System for drying FCC catalyst drying process |
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