CN216137196U - Catalyst unloading system of catalytic cracking unit - Google Patents
Catalyst unloading system of catalytic cracking unit Download PDFInfo
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- CN216137196U CN216137196U CN202121681962.XU CN202121681962U CN216137196U CN 216137196 U CN216137196 U CN 216137196U CN 202121681962 U CN202121681962 U CN 202121681962U CN 216137196 U CN216137196 U CN 216137196U
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- catalytic cracking
- filter
- cracking unit
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Abstract
The utility model provides a catalyst unloading system of a catalytic cracking unit, which 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 on 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 utility model 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 utility model relates to the field of petrochemical industry, in particular to a catalyst unloading system of 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.
SUMMERY OF THE UTILITY MODEL
The utility model provides a catalyst unloading system of a catalytic cracking device, which solves the problems that workers in the existing operation mode have high labor intensity, the environment has large dust pollution in the process of loading and transferring a 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 utility model 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.
The utility model has the beneficial effects that:
the utility model 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 utility model provides a catalyst unloading system of a catalytic cracking device as shown in figure 1, which aims to solve the problems that the labor intensity of workers is high, the environmental dust pollution is large 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 in the existing operation mode.
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 utility model, 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 utility model 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 utility model 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 utility model, 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 utility model 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 utility model 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 utility model 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 utility model 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 (8)
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 vacuum extractor (2) is a steam vacuum extractor and comprises a sintering filter (201) and a steam ejector (202), the lower end of the steam ejector (202) is connected with the upper end of the sintering filter (201), the sintering filter (201) is arranged at the top of the catalyst storage tank (1), and the lower end of the sintering 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).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121681962.XU CN216137196U (en) | 2021-07-23 | 2021-07-23 | Catalyst unloading system of catalytic cracking unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121681962.XU CN216137196U (en) | 2021-07-23 | 2021-07-23 | Catalyst unloading system of catalytic cracking unit |
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| CN216137196U true CN216137196U (en) | 2022-03-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113559791A (en) * | 2021-07-23 | 2021-10-29 | 陕西延长石油（集团）有限责任公司 | Catalyst unloading system and method of catalytic cracking device |
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2021
- 2021-07-23 CN CN202121681962.XU patent/CN216137196U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113559791A (en) * | 2021-07-23 | 2021-10-29 | 陕西延长石油（集团）有限责任公司 | Catalyst unloading system and method of catalytic cracking device |
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