CN113559791A - Catalyst unloading system and method of catalytic cracking device - Google Patents
Catalyst unloading system and method of catalytic cracking device Download PDFInfo
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- CN113559791A CN113559791A CN202110834265.1A CN202110834265A CN113559791A CN 113559791 A CN113559791 A CN 113559791A CN 202110834265 A CN202110834265 A CN 202110834265A CN 113559791 A CN113559791 A CN 113559791A
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- catalyst
- storage tank
- catalytic cracking
- filter
- cracking unit
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- 239000003054 catalyst Substances 0.000 title claims abstract description 97
- 238000004523 catalytic cracking Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000003860 storage Methods 0.000 claims abstract description 50
- 239000000428 dust Substances 0.000 claims abstract description 48
- 239000000843 powder Substances 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 6
- 238000004080 punching Methods 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 abstract description 25
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000009736 wetting Methods 0.000 abstract description 2
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Classifications
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- 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
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/0015—Feeding of the particles in the reactor; Evacuation of the particles out of the reactor
-
- 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
- B01J3/00—Processes of utilising sub-atmospheric or super-atmospheric pressure to effect chemical or physical change of matter; Apparatus therefor
- B01J3/006—Processes utilising sub-atmospheric pressure; Apparatus therefor
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G11/00—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention provides a catalyst unloading system and a catalyst unloading method for a catalytic cracking unit. The steam ejector is a steam ejector and comprises a sintered filter and a steam ejector, the lower end of the steam ejector is connected with the upper end of the sintered filter, the sintered filter is arranged at the top of the catalyst storage tank, and the lower end of the sintered filter is positioned in the catalyst storage tank. The invention changes the condition that the catalyst at the bottom of the regenerator needs manual bagging after the current catalytic cracking unit stops working, and simultaneously combines the conversion agent and the dust removal, thereby thoroughly changing the operation environment of the catalytic cracking unit for stopping working and unloading the catalyst, improving the efficiency of unloading the catalyst, and avoiding the conditions of wetting and pollution in the processes of bagging and transferring the catalyst after unloading the catalyst.
Description
Technical Field
The invention relates to the field of petrochemical industry, in particular to a catalyst unloading system and a catalyst unloading method for a catalytic cracking unit.
Background
The existing catalytic cracking unit uses the powder catalytic cracking catalyst, and the unit must transfer the catalyst in the regenerator out during the shutdown and maintenance period to be used as a start-up balancing agent for standby.
The shutdown and agent transferring operation of the regenerator in the catalytic cracking device depends on an agent unloading system of the device, and the agent unloading port of the agent unloading system cannot be arranged at the lowest point of the regenerator, so that part of the catalyst below the agent unloading port in the regenerator cannot be transferred in the conventional agent unloading system, and workers are required to manually bag the catalyst at the bottom of the regenerator in the actual operation process and then transfer the catalyst out of the regenerator. The operation mode has high labor intensity of workers, large environmental dust pollution in the process of loading and transferring the catalyst, and the bagged catalyst is easily affected with damp and polluted in the process of loading and transferring and cannot be reused as a balancing agent.
Disclosure of Invention
The invention provides a catalyst unloading system and a catalyst unloading method for a catalytic cracking device, aiming at solving the problems that in the existing operation mode, workers have high labor intensity, the environment has large dust pollution in the process of loading and transferring the catalyst, and the bagged catalyst is easy to be damped and polluted in the process of loading and transferring and cannot be reused as a balancing agent.
The technical scheme adopted by the invention is as follows:
a catalyst unloading system of a catalytic cracking unit comprises a catalyst storage tank, an evacuator and a dust collecting device, wherein the evacuator is arranged at the top of the catalyst storage tank, and an outlet in the side wall of the upper part of the catalyst storage tank is connected with the dust collecting device.
The steam ejector is a steam ejector and comprises a sintered filter and a steam ejector, the lower end of the steam ejector is connected with the upper end of the sintered filter, the sintered filter is arranged at the top of the catalyst storage tank, and the lower end of the sintered filter is positioned in the catalyst storage tank.
The dust collecting device at least comprises a powder conveying pipeline and a dust collector, and the dust collector is connected with an outlet on the side wall of the upper part of the catalyst storage tank through the powder conveying pipeline; both ends of the powder conveying pipeline are provided with cut-off valves.
The dust collector comprises a rubber hose and a filter, one end of the filter is connected with the rubber hose through a reducing joint, and the other end of the filter is connected with a powder conveying pipeline of the dust collecting device.
The filter is a Y-shaped filter.
The aperture of the filter screen in the Y-shaped filter is not more than 3 mm.
The upper end of the catalyst storage tank is cylindrical, the lower end of the catalyst storage tank is conical, and the conical bottom is provided with a discharging valve.
The side wall of the catalyst storage tank is provided with a punching valve, and the top of the catalyst storage tank is also provided with a safety valve, a material level measuring port and a pressure gauge.
A catalyst unloading method of a catalytic cracking unit comprises the following specific steps: step one, closing a stamping valve on a catalyst storage tank;
step two, vacuumizing, opening a steam evacuator for vacuumizing, and confirming that the vacuum degree is below-0.15 Mpa;
step three, opening the dust collector to start working;
and step four, after the operation is finished, closing the steam evacuator, and closing the dust collector to finish the operation after the pressure is recovered to one atmosphere.
And in the fourth step, when the dust collector is closed, firstly, the stop valve at the joint of the dust collector and the powder conveying pipeline is closed, and then the stop valve at the joint of the side wall outlet of the catalyst storage tank and the powder conveying pipeline is closed.
The invention has the beneficial effects that:
the invention adds the evacuator and the dust collecting device, changes the operation environment of the catalytic cracking unit for stopping and unloading the agent, improves the agent unloading efficiency, and avoids the situations of moisture and pollution in the processes of bagging and transferring the catalyst after unloading the agent.
The following will be further described with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention,
in the figures, the reference numbers are: 1. a catalyst storage tank; 101. a ram valve; 102. a discharge valve; 103. a safety valve; 104. a level measurement port; 2. an evacuator; 201. sintering the filter; 202. a steam ejector; 3. a powder delivery conduit; 4. a dust collector; 401. a rubber hose; 402. a filter; 403. a reducer union; 5. a pressure gauge; 6. and (6) cutting off the valve.
Detailed Description
Example 1:
the invention provides a catalyst unloading system and a method of a catalytic cracking device, which are shown in figure 1, and aims to solve the problems that workers in the existing operation mode have high labor intensity, the environment dust pollution is large in the loading and transferring process, and the bagged catalyst is easy to damp and pollute in the loading and transferring process and cannot be reused as a balancing agent.
A catalyst unloading system of a catalytic cracking unit comprises a catalyst storage tank 1, an evacuator 2 and a dust collecting device, wherein the evacuator 2 is arranged at the top of the catalyst storage tank 1, and an outlet in the side wall of the upper part of the catalyst storage tank 1 is connected with the dust collecting device.
In the invention, a catalyst storage tank 1 is used for storing the catalyst, an evacuator 2 is used for forming negative pressure, and a dust collecting device is used for removing dust. The invention changes the situation that the catalyst at the bottom of the regenerator needs to be manually bagged after the current catalytic cracking unit stops working. The invention combines the conversion agent and the dust removal, thoroughly changes the operation environment of the catalytic cracking unit for stopping and unloading the agent, improves the agent unloading efficiency, and avoids the situations of moisture and pollution in the processes of bagging and transferring the catalyst after unloading the agent.
Example 2:
based on embodiment 1, in this embodiment, preferably, the vacuum pump 2 is a steam vacuum pump, and includes a sintered filter 201 and a steam ejector 202, a lower end of the steam ejector 202 is connected to an upper end of the sintered filter 201, the sintered filter 201 is disposed at a top of the catalyst storage tank 1, and a lower end of the sintered filter 201 is located in the catalyst storage tank 1.
Preferably, the dust collecting device at least comprises a powder conveying pipeline 3 and a dust collector 4, and the dust collector 4 is connected with an outlet on the side wall of the upper part of the catalyst storage tank 1 through the powder conveying pipeline 3; both ends of the powder conveying pipeline 3 are provided with a stop valve 6.
The powder conveying pipeline 3 adopts Q345R and the pipe diameter DN200, the length of the pipeline can be determined according to the actual condition (generally more than 10 meters), and the interior of the pipeline has no coating. Both ends of the powder conveying pipeline 3 are connected with a shut-off valve 6, and one shut-off valve 6 is connected with a filter 402 of the dust collector 4 through a flange.
Preferably, the dust collector 4 comprises a rubber hose 401 and a filter 402, one end of the filter 402 is connected with the rubber hose 401 through a reducer union 403, and the other end is connected with the powder conveying pipeline 3 of the dust collecting device.
The reducer union 403 solves the problem of different calibers in pipeline connection, and has the functions of shock absorption and noise reduction, so that the pipeline installation parts can be saved, and the cost is saved.
Preferably, the filter 402 is a Y-filter.
Preferably, the aperture of the filter screen in the Y-shaped filter is not more than 3 mm.
In the invention, the rubber hose 401 is preferably a DN150 wear-resistant steel wire skeleton corrugated rubber hose, one end of the rubber hose is provided with a flange, one end of the flange is connected with the concentric reducing DN 200-DN 150 reducing end, and the other end of the flange is connected with the filter 402. Filter 402 is preferably a DN200 flange Y filter with a 3mm mesh size that primarily filters broken liners and other debris. The length of the rubber hose 401 is determined according to actual use. The Y-shaped filter has the advantages of advanced structure, small resistance and convenient pollution discharge.
Preferably, the upper end of the catalyst storage tank 1 is cylindrical, the lower end is conical, and the conical bottom is provided with a discharge valve 102.
Preferably, a stamping valve 101 is arranged on the side wall of the catalyst storage tank 1, and a safety valve 103, a material level measuring port 104 and a pressure gauge 5 are further arranged at the top of the catalyst storage tank 1.
As shown in fig. 1, the upper part of the catalyst storage tank 1 of the present invention is a cylindrical structure, and the lower part is a cone, the top of the catalyst storage tank 1 is provided with a plurality of ports, at least comprising: the evacuation port, the material level measuring port, the pressure measuring port and the safety valve port, and a sintering filter 201 is arranged at the joint of the inside of the catalyst storage tank 1 and the evacuation port. The evacuation port is connected with the steam ejector 202, a pressure gauge 5 is arranged at the pressure gauge port, the safety valve port is connected with a safety valve 103, and a double-gate valve is arranged at the material level measuring port 104. The upper part of the side wall of the catalyst storage tank 1 is provided with a stamping opening, and the stamping opening is provided with a stamping valve 101. The bottom of the cone at the lower part of the catalyst storage tank 1 is provided with a discharge port, the discharge port is provided with an agent discharge valve 102, the material quality of the catalyst storage tank 1 is Q345R at the design temperature of 220-450 ℃ and the design pressure of 0.78-1.0 MPa (abs), and the preferred catalyst storage tank 1 has the inner diameter phi 6000mm, the wall thickness of 18mm and the total height of 23000 mm.
The invention provides a catalyst unloading method of a catalytic cracking unit, which comprises the following specific steps: step one, closing a stamping valve 101 on a catalyst storage tank 1;
step two, vacuumizing, opening the steam evacuator 2 for vacuumizing, and confirming that the vacuum degree is below-0.15 Mpa;
step three, opening the dust collector 4 to start working;
and step four, after the operation is finished, closing the steam evacuator 2, and closing the dust collector 4 to finish the operation when the pressure is recovered to one atmosphere.
Preferably, in the fourth step, when the dust collector 4 is closed, the shut-off valve 6 at the connection between the dust collector 4 and the powder conveying pipeline 3 is closed, and then the shut-off valve 6 at the connection between the side wall outlet of the catalyst storage tank 1 and the powder conveying pipeline 3 is closed.
The implementation process of the invention comprises the following steps:
firstly, the pressure of the catalyst storage tank 1 is checked by a pressure gauge 5, and if the pressure exists, the pressure field does not exceed 0.5MPa, and the stamping valve 101 is closed.
And secondly, vacuumizing, and opening the steam evacuator 2 for vacuumizing.
Thirdly, the vacuum degree is confirmed to be below-0.15 MPa.
Fourthly, opening the dust collector 4 to start working; catalyst dump shut-off completion upon completion of operation
The steam evacuator shuts off the dust collector 4 when the pressure returns to normal pressure (one atmosphere).
The working principle of the invention is as follows: after the steam evacuator 2 is started, the catalyst storage tank 1 forms negative pressure, and the catalyst below a discharging port in the regenerator is sucked into the catalyst storage tank 1 through the powder conveying pipeline 3 and the dust collector 4 without manual bagging. Meanwhile, because the agent transferring process is negative pressure operation, catalyst dust can not be generated when manual bagging is carried out before, and meanwhile, the catalyst dust can reach the catalyst storage tank 1 through the integrator 4, so that the pollution which may occur in the bagging and transferring process is avoided, the operation environment of shutdown and agent unloading of the catalytic cracking unit is thoroughly changed, and the agent unloading efficiency is improved.
The invention can realize the dustless operation of the agent unloading at the bottom of the regenerator after the catalytic device stops working, can completely avoid the possibility of catalyst wetting and pollution in the agent unloading process, and reduce the working strength of the agent unloading.
The above examples are merely illustrative of the present invention and should not be construed as limiting the scope of the present invention, and all designs identical or similar to the present invention are within the scope of the present invention. The apparatus structure and the method steps thereof, which are not described in detail in the present invention, are prior art and will not be further described in the present invention.
Claims (10)
1. A catalyst unloading system of a catalytic cracking unit is characterized in that: the device comprises a catalyst storage tank (1), an evacuator (2) and a dust collecting device, wherein the evacuator (2) is arranged at the top of the catalyst storage tank (1), and an outlet in the side wall of the upper part of the catalyst storage tank (1) is connected with the dust collecting device.
2. The catalyst unloading system of a catalytic cracking unit according to claim 1, wherein: the steam vacuum pump is characterized in that the vacuum pump (2) is a steam vacuum pump and comprises a sintered filter (201) and a steam ejector (202), the lower end of the steam ejector (202) is connected with the upper end of the sintered filter (201), the sintered filter (201) is arranged at the top of the catalyst storage tank (1), and the lower end of the sintered filter (201) is positioned in the catalyst storage tank (1).
3. The catalyst unloading system of a catalytic cracking unit according to claim 1, wherein: the dust collecting device at least comprises a powder conveying pipeline (3) and a dust collector (4), wherein the dust collector (4) is connected with an outlet on the side wall of the upper part of the catalyst storage tank (1) through the powder conveying pipeline (3); both ends of the powder conveying pipeline (3) are provided with cut-off valves (6).
4. The catalyst stripper system of a catalytic cracking unit of claim 3, wherein: the dust collector (4) comprises a rubber hose (401) and a filter (402), one end of the filter (402) is connected with the rubber hose (401) through a reducing joint (403), and the other end of the filter is connected with a powder conveying pipeline (3) of the dust collecting device.
5. The catalyst unloading system of a catalytic cracking unit according to claim 4, wherein: the filter (402) is a Y-shaped filter.
6. The catalyst unloading system of a catalytic cracking unit according to claim 5, wherein: the aperture of the filter screen in the Y-shaped filter is not more than 3 mm.
7. The catalyst unloading system of a catalytic cracking unit according to claim 1, wherein: the upper end of the catalyst storage tank (1) is cylindrical, the lower end of the catalyst storage tank is conical, and the conical bottom is provided with a discharge valve (102).
8. The catalyst stripper system of a catalytic cracking unit according to claim 1 or 7, wherein: the device is characterized in that a punching valve (101) is arranged on the side wall of the catalyst storage tank (1), and a safety valve (103), a material level measuring port (104) and a pressure gauge (5) are further arranged at the top of the catalyst storage tank (1).
9. A catalyst unloading method of a catalytic cracking unit is characterized in that: the method comprises the following specific steps: step one, closing a stamping valve (101) on a catalyst storage tank (1);
step two, vacuumizing, opening the steam evacuator (2) for vacuumizing, and confirming that the vacuum degree is below-0.15 Mpa;
step three, opening the dust collector (4) to start working;
and step four, after the operation is finished, closing the steam evacuator (2), and closing the dust collector (4) to finish the operation when the pressure is recovered to one atmosphere.
10. The catalyst stripper system of a catalytic cracking unit of claim 9, wherein: in the fourth step, when the dust collector (4) is closed, the stop valve (6) at the joint of the dust collector (4) and the powder conveying pipeline (3) is closed at first, and then the stop valve (6) at the joint of the side wall outlet of the catalyst storage tank (1) and the powder conveying pipeline (3) is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110834265.1A CN113559791A (en) | 2021-07-23 | 2021-07-23 | Catalyst unloading system and method of catalytic cracking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110834265.1A CN113559791A (en) | 2021-07-23 | 2021-07-23 | Catalyst unloading system and method of catalytic cracking device |
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| Publication Number | Publication Date |
|---|---|
| CN113559791A true CN113559791A (en) | 2021-10-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110834265.1A Pending CN113559791A (en) | 2021-07-23 | 2021-07-23 | Catalyst unloading system and method of catalytic cracking device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114405414A (en) * | 2022-01-26 | 2022-04-29 | 西安石油大学 | Reaction unit convenient to load catalyst from suction |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1007248A (en) * | 1962-05-23 | 1965-10-13 | Exxon Research Engineering Co | Cracking of hydrocarbons |
| CN102616568A (en) * | 2012-04-13 | 2012-08-01 | 上海蓝科石化工程技术有限公司 | Dust-free automatic catalyst conversion system of catalytic cracking device |
| CN103657538A (en) * | 2012-09-05 | 2014-03-26 | 中国石油化工股份有限公司 | Method for loading and unloading catalysts for fixed fluidized bed reactor |
| CN207478355U (en) * | 2017-11-28 | 2018-06-12 | 南京塔川化工设备有限公司 | A kind of FCC catalyst gravity tune mixing device of Geldart-D particle |
| CN216137196U (en) * | 2021-07-23 | 2022-03-29 | 陕西延长石油（集团）有限责任公司 | Catalyst unloading system of catalytic cracking unit |
-
2021
- 2021-07-23 CN CN202110834265.1A patent/CN113559791A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1007248A (en) * | 1962-05-23 | 1965-10-13 | Exxon Research Engineering Co | Cracking of hydrocarbons |
| CN102616568A (en) * | 2012-04-13 | 2012-08-01 | 上海蓝科石化工程技术有限公司 | Dust-free automatic catalyst conversion system of catalytic cracking device |
| CN103657538A (en) * | 2012-09-05 | 2014-03-26 | 中国石油化工股份有限公司 | Method for loading and unloading catalysts for fixed fluidized bed reactor |
| CN207478355U (en) * | 2017-11-28 | 2018-06-12 | 南京塔川化工设备有限公司 | A kind of FCC catalyst gravity tune mixing device of Geldart-D particle |
| CN216137196U (en) * | 2021-07-23 | 2022-03-29 | 陕西延长石油（集团）有限责任公司 | Catalyst unloading system of catalytic cracking unit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114405414A (en) * | 2022-01-26 | 2022-04-29 | 西安石油大学 | Reaction unit convenient to load catalyst from suction |
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