Self-filtering and recycling device for catalyst of oil refining catalytic system

Abstract

The utility model provides an oil refining catalytic system catalyst self-filtering recovery device which comprises a first catalyst discharge pipeline communicated with the bottom of a first catalyst tank, the first catalyst discharge pipeline is communicated with a first catalyst backflow pipeline, and the first catalyst backflow pipeline is communicated with the upper portion of the first catalyst tank. The catalyst discharge pipeline I is sequentially communicated with a valve I, an emptying pipeline I, a sieve plate I, a reverse blowing pipeline I and a valve II from top to bottom; a first conveying air pipeline is communicated between the second valve and the third valve, and the upper portion of the first catalyst tank is communicated with a first pressurizing pipeline. After the catalyst is filtered by the self-filtering recovery device, the lower part of the sieve plate can be purged through the purge pipeline, lumps on a lining at the upper part of the sieve plate are purged to be clean, emptying is performed through the emptying pipeline, then the process is recovered, and filtering can be performed again. According to the utility model, the agent adding time can be shortened to 2 hours, the agent adding time is greatly shortened, the pipeline is not blocked, and catalyst loss and environmental pollution are avoided while the start-up progress is accelerated.

Description

Technical Field

[0001] The utility model belongs to the technical field of petrochemical equipment, and in particular relates to a catalyst self-filtering and recovering device for an oil refining catalytic system. Background Art

[0002] During the start-up of Yonglian's 1.2 million tons / year catalytic cracking unit over the years, there was a serious problem: during the start-up, it was difficult to add catalyst to the reaction unit, and it took a long time. If the addition was smooth, it took about 8-12 hours; if the addition was not smooth, it took longer, about 22-24 hours. The slow addition of the reaction unit seriously affected the start-up process and delayed the feeding time. On the other hand, due to the difficulty of adding the reaction agent, the distillation and absorption units circulated for a long time, increasing the risk of cold exchange leakage; the poor start-up addition had a serious impact on the smooth start-up of the catalytic unit.

[0003] In response to this technical problem, the technicians of the device conducted an on-site inspection and analysis and found that it was caused by the blockage of the dosing pipeline. During normal production, due to temperature changes, wear and other factors, a small amount of lining blocks will be generated inside the two devices. Most of these linings are small and irregular, with a diameter of 5-10cm, and gather at the bottom of the regenerator. As the device runs longer, the block lining will continue to increase.

[0004] During the shutdown period for catalyst unloading, a large amount of lumps will be transferred to the catalyst storage tank along with the catalyst. During the start-up process, if the dosing operation is carried out, the dosing pipeline will be blocked by the lumps in about 4-5 minutes, and the dosing can only be stopped. After the blocked pipeline is repaired to normal, dosing can be carried out again. Because there are always small pieces of lining in the catalyst, the pipeline is constantly blocked, and the above cleaning process is repeated, which leads to very low dosing efficiency and too long dosing time, about 8-24 hours. Utility Model Content

[0005] The utility model aims to provide a catalyst self-filtration recovery device for an oil refining catalytic system, so as to overcome the above-mentioned technical problems existing in the prior art.

[0006] To this end, the technical solution provided by the utility model is as follows:

[0007] A catalyst self-filtration recovery device for a petroleum refining catalytic system, comprising a catalyst discharge pipeline 1, the catalyst discharge pipeline 1 being connected to a bottom of a catalyst tank 1 of the petroleum refining catalytic system, the catalyst discharge pipeline 1 being connected to a catalyst reflux pipeline 1, the catalyst reflux pipeline 1 being connected to an upper portion of the catalyst tank 1;

[0008] The catalyst discharge pipeline 1 is connected with valve 1, vent pipeline 1, sieve plate 1, back-blowing pipeline 1 and valve 2 in sequence from top to bottom, and the catalyst reflux pipeline 1 is provided with valve 3 and valve 4;

[0009] An air delivery pipeline 1 is connected between the valve 2 and the valve 3, and a pressure charging pipeline 1 is connected to the upper part of the catalyst tank 1.

[0010] It also includes a catalyst tank 2, the upper part of which is connected to a charging pipeline 2 and a catalyst reflux pipeline 2, and a connecting pipeline is provided between the catalyst reflux pipeline 1 and the catalyst reflux pipeline 2;

[0011] The bottom of the catalyst tank 2 is connected to a catalyst discharge pipeline 2, and the catalyst discharge pipeline 2 is connected to a catalyst reflux pipeline 2. The catalyst discharge pipeline 2 is connected to valve 5, vent pipeline 2, sieve plate 2, back-blowing air pipeline 2, valve 6 and valve 7 from top to bottom in sequence. A conveying air pipeline 2 is connected between valve 6 and valve 7. Valves 8 and 9 are provided on the catalyst reflux pipeline 2. Valve 10 is provided on the connecting pipeline. One end of the connecting pipeline is connected to the pipeline before valve 3 of the catalyst reflux pipeline 1, and the other end of the connecting pipeline is connected to the pipeline before valve 9 of the catalyst reflux pipeline 2.

[0012] The tops of the catalyst tank 1 and the catalyst tank 2 are both connected to vacuum lines through pipelines and valves, and silencers are installed on the vacuum lines.

[0013] The sieve plate 1 and the catalyst discharge pipeline 1 are connected via a flange.

[0014] A valve 11 and a pressure gauge 1 are installed on the air delivery pipeline 1.

[0015] The beneficial effects of the utility model are:

[0016] The catalyst self-filtration and recovery device of the oil refining catalytic system provided by the utility model pressurizes the catalyst tank one through the pressure charging pipeline one, so that the catalyst is discharged quickly, and the lining blocks carried in the catalyst are filtered through the sieve plate on the catalyst discharge pipeline one, and then the filtered catalyst is returned to the catalyst tank one or the catalyst tank two through the catalyst reflux pipeline under the vacuum effect of the vacuum pipeline of the conveying air pipeline one conveying fan.

[0017] After the filtration is completed, the lower part of the sieve plate can be purged through the purge pipeline to clean the lining blocks on the upper part of the sieve plate, and then emptied through the venting pipeline, and then the process can be restored and filtered again. The utility model can shorten the dosing time to 2 hours, greatly shorten the dosing time, and there is no clogging in the pipeline. While speeding up the start-up progress, it also avoids catalyst loss and environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of an implementation method of the utility model.

[0019] In the figure: 1, catalyst tank 1; 2, catalyst discharge pipeline 1; 3, conveying air pipeline 1; 4, catalyst return pipeline 1; 5, charging pipeline 1; 6, valve 1; 7, valve 2; 8, valve 3; 9, valve 4; 10, valve 5; 11, valve 6; 12, valve 7; 13, valve 8; 14, valve 9; 15, valve 10; 16, valve 11; 17, vacuum pipeline; 18, charging valve 1; 19, vent valve 1; 20, sieve plate 1; 21, back-blowing pipeline 1; 22, back-blowing valve 1; 23, Pressure gauge one; 24, catalyst tank two; 25, sieve plate two; 26, silencer; 27, vent line one; 28, valve twelve; 29, charging line two; 30, charging valve two; 31, catalyst discharge line two; 32, vent line two; 33, vent valve two; 34, back-blowing pipeline two; 35, back-blowing valve two; 36, pressure gauge two; 37, delivery air pipeline two; 38, valve thirteen; 39, valve fourteen; 40, valve fifteen; 41, catalyst reflux pipeline two; 42, connecting pipeline. DETAILED DESCRIPTION

[0020] The following is an explanation of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0021] The exemplary embodiments of the present invention are now introduced with reference to the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to disclose the present invention in detail and completely and to fully convey the scope of the present invention to those skilled in the art. The terms in the exemplary embodiments shown in the accompanying drawings are not intended to limit the present invention. In the accompanying drawings, the same units / elements are marked with the same reference numerals.

[0022] Unless otherwise specified, the terms (including technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it is understood that the terms defined in commonly used dictionaries should be understood to have the same meanings as those in the context of the relevant fields, and should not be understood as idealized or overly formal meanings.

[0023] Example 1

[0024] The utility model provides a catalyst self-filtration recovery device for a petroleum refining catalytic system, comprising a catalyst discharge pipeline-2, the catalyst discharge pipeline-2 is connected to the bottom of a catalyst tank-1 of the petroleum refining catalytic system, the catalyst discharge pipeline-2 is connected to a catalyst reflux pipeline-4, the catalyst reflux pipeline-4 is connected to the upper part of the catalyst tank-1;

[0025] The catalyst discharge pipeline 1 is connected to a valve 6, a vent pipeline 27, a sieve plate 20, a back-blowing pipeline 21 and a valve 27 from top to bottom, and the catalyst reflux pipeline 1 is provided with a valve 3 8 and a valve 4 9;

[0026] An air delivery pipeline 1 3 is connected between the valve 2 7 and the valve 3 8 , and a pressure charging pipeline 1 5 is connected to the upper part of the catalyst tank 1 .

[0027] Working process:

[0028] Self-filtration and self-circulation: open valve 16, valve 27, valve 38 and valve 49, and open the pressure-charging valve 18 and valve 1116, and use the pressure-charging pipeline 5 to pressurize the catalyst tank 1, so that the catalyst in the catalyst tank 1 is discharged through the catalyst discharge pipeline 2, and then filtered through the sieve plate 20. After filtration, the catalyst is driven by the conveying wind of the conveying air pipeline 3 and returns to the catalyst tank 1 through the catalyst reflux pipeline 4.

[0029] Continue to operate for about 24 hours, or when the conveying air pressure drops to the minimum value during the filtration process, stop the operation, close valve 6, open the vent valve 19 on the vent pipeline 27, vent the upper part of the sieve plate 20, and open the back-blowing valve 22 of the back-blowing pipeline 21 to purge the lower part of the sieve plate 20, purge the lining blocks on the upper part of the sieve plate 20, and then resume the process and filter again. After repeating the filtration 3-4 times, the catalyst basically does not contain impurities such as lining blocks, and the large-scale dosing is smooth at the start-up. The dosing time is shortened to 2 hours, the dosing time is greatly shortened, and there is no clogging in the pipeline. While speeding up the start-up progress, it also avoids catalyst loss and environmental pollution.

[0030] Among them, during the filtering process, it is necessary to replace the sieve plates 20 with different apertures, from large to small, with the smallest aperture being 20 mm, so as to achieve filtering.

[0031] Example 2

[0032] On the basis of Example 1, this embodiment provides a catalyst self-filtration recovery device for a refinery catalytic system, further comprising a catalyst tank 24, the upper portion of which is connected to a charging pipeline 29 and a catalyst reflux pipeline 2, and a connecting pipeline is provided between the catalyst reflux pipeline 14 and the catalyst reflux pipeline 2;

[0033] The bottom of the catalyst tank 24 is connected to a catalyst discharge pipeline 2 31, and the catalyst discharge pipeline 2 31 is connected to a catalyst reflux pipeline 2 41. The catalyst discharge pipeline 2 31 is connected to valve 5 10, vent pipeline 2 32, sieve plate 25, back-blowing pipeline 2 34, valve 6 11 and valve 7 12 from top to bottom, and a conveying air pipeline 2 37 is connected between the valve 6 11 and the valve 7 12. The catalyst reflux pipeline 2 is provided with valve 8 13 and valve 9 14. The connecting pipeline 42 is provided with valve 10 15. One end of the connecting pipeline is connected to the pipeline before valve 3 8 of the catalyst reflux pipeline 1 4, and the other end of the connecting pipeline is connected to the pipeline before valve 9 14 of the catalyst reflux pipeline 2 41.

[0034] When the catalyst tank 1 needs to be repaired or the catalyst needs to be dumped, the catalyst in the catalyst tank 1 can be filtered and discharged into the catalyst tank 2 24. The specific process is as follows: Figure 1 As shown, open valve 16, valve 2 7, valve 8 13, valve 9 14, valve 10 15 and valve 11 16, close valve 3 8, valve 4 9 and valve 7 12, and open charging valve 18 on charging pipeline 15 at the same time to charge catalyst tank 1, so that the catalyst enters catalyst discharge pipeline 2, is filtered by sieve plate 20, and is pushed by the conveying air of conveying air pipeline 3 to be discharged into catalyst tank 2 24 through catalyst discharge pipeline 2, connecting pipeline and catalyst reflux pipeline 2 in sequence.

[0035] After all the catalysts enter the catalyst tank 24, close the pressure valve 18, the conveying air valve 16 and the valve 10 15, open the pressure valve 230, the conveying air valve 27, the valve 5 10, the valve 6 11, the valve 7 12 and the valve 12 28, and then pressurize the catalyst tank 24 through the pressure pipeline 29, so that the catalyst in the catalyst tank 24 is discharged through the catalyst discharge pipeline 231, and then filtered through the sieve plate 25. After filtration, the catalyst is driven by the conveying air of the conveying air pipeline 237 and returns to the catalyst tank 24 through the catalyst reflux pipeline 2; according to the number of filtrations and requirements, the aperture of the sieve plate 25 is changed to complete the filtration of the catalyst. Among them, the pressure of the pressure pipeline 29 is 0.4-0.5MPa, the conveying air pressure is 0.45MPa, and the conveying air working pressure is 0.4MPa.

[0036] After the filtration is completed, close valve five 10, valve six 11 and charging valve two 30, open vent valve two 337 and back-blowing valve two 35, and use back-blowing air to blow the lower part of the sieve plate two 25 to clean the lining blocks on the upper part of the sieve plate two 25.

[0037] Example 3

[0038] Based on Example 2, this example provides a catalyst self-filtration recovery device for a refinery catalytic system, such as Figure 1As shown, the tops of the catalyst tank 1 and the catalyst tank 2 24 are both connected to a vacuum line 17 through pipelines and valves, and a muffler 26 is installed on the vacuum line 17.

[0039] In the process of discharging the catalyst in catalyst tank 1 to catalyst tank 2 24, valve 14 39 is closed, valve 13 38 and valve 15 40 are opened, and catalyst tank 1 is pressurized through pressurized air line 1, and catalyst tank 2 24 is vacuumed through vacuum line 17, so as to speed up the filtration and flow speed of the catalyst and shorten the filtration time.

[0040] In this embodiment, the steam is evacuated in the vacuum line 17 with a suction force of 1.0 MPa and a temperature of 280-300° C. The noise is reduced by the muffler 26 .

[0041] Example 4

[0042] On the basis of Example 1, this example provides a catalyst self-filtration recovery device for a refinery catalytic system, wherein the sieve plate 20 and the catalyst discharge pipeline 2 are connected via a flange.

[0043] The flange connection makes it easy to replace the sieve plate 20 and to clean the filtered material.

[0044] Example 5

[0045] On the basis of Example 1, this example provides a catalyst self-filtration recovery device for a refinery catalytic system, wherein a valve 11 16 and a pressure gauge 23 are installed on the air delivery pipeline 3 .

[0046] like Figure 1 As shown, the working pressure of the conveying air can be displayed by the pressure gauge 1 23 on the conveying air pipeline 1 3 and the pressure gauge 2 36 on the conveying air pipeline 2 37. When the pressure drops to the minimum value, it is necessary to stop the operation, close the discharge valve of the catalyst tank 1 and the catalyst tank 2 24, open the upper part of the sieve plate 1 20 and the sieve plate 2 25 for large venting, open the lower part of the sieve plate 1 and the sieve plate 2 25 for purge air, purge the lining blocks on the upper part of the sieve plate 1 20 and the sieve plate 2 25, and then resume the process and filter again.

[0047] like Figure 1 As shown, the working pressure of the conveying air can be displayed by the pressure gauge 1 on the conveying air line 1 and the pressure gauge 2 on the conveying air line 2. When the pressure drops to the minimum value, it is necessary to stop the operation, close the discharge valves of the catalyst tank 1 and the catalyst tank 2, open the upper part of the sieve plate 1 and the sieve plate 2 for large venting, open the lower part of the sieve plate 1 and the sieve plate 2 for purge air, and after the lining blocks on the upper part of the sieve plate 1 and the sieve plate 2 are cleaned, resume the process and filter again.

[0048] The economic benefits of this utility model are:

[0049] The average start-up time of the previous years is 8 hours. The start-up time of this time is 2 hours, which is 6 hours in advance. The economic benefits are as follows:

[0050] Table 1 Statistics of the benefits per ton of raw materials

[0051]

[0052] Note: The yield is the data of 2023, and the oil price is the market sales price;

[0053] a. Gasoline yield is 51.04%, price is 8889 yuan / t, and the benefit is 1*0.5104*0.8889=4536.9 yuan; b. Diesel yield is 18.69%, price is 7663 yuan / t, and the benefit is 1*0.1869*7663=1432.2 yuan;

[0054] c. The yield of liquefied gas is 17.23%, the price is 3970 yuan / t, and the profit is 1*0.1723*3970=684.0 yuan;

[0055] 1 ton of raw materials can generate benefits of 4536.9+1432.2+684=6653.1 yuan;

[0056] Under normal circumstances, the processing volume per hour is calculated as 140 tons. If the work starts 6 hours in advance, the benefits can be: 6*140*6653.1=5.589 million yuan ≈ 5.59 million yuan;

[0057] Social benefits:

[0058] Through technical transformation, the start-up dosing time is greatly reduced. On the one hand, the catalyst discharge is eliminated, reducing environmental pollution and catalyst loss; on the other hand, the waiting time for distillation and absorption stabilization units is reduced, reducing the risk of oil leakage, which is conducive to safe production. The above examples are only examples of the utility model and do not constitute a limitation on the protection scope of the utility model. All designs that are the same or similar to the utility model belong to the protection scope of the utility model.

Claims

1. A catalyst self-filtration recovery device for an oil refining catalytic system, characterized in that: It comprises a catalyst discharge pipeline 1, the catalyst discharge pipeline 1 is connected to the bottom of a catalyst tank 1 of the oil refining catalytic system, the catalyst discharge pipeline 1 is connected to a catalyst reflux pipeline 1, and the catalyst reflux pipeline 1 is connected to the upper part of the catalyst tank 1; The catalyst discharge pipeline 1 is connected with valve 1, vent pipeline 1, sieve plate 1, back-blowing pipeline 1 and valve 2 in sequence from top to bottom, and the catalyst reflux pipeline 1 is provided with valve 3 and valve 4; An air delivery pipeline 1 is connected between the valve 2 and the valve 3, and a pressure charging pipeline 1 is connected to the upper part of the catalyst tank 1.

2. The catalyst self-filtration recovery device for a petroleum refining catalytic system according to claim 1, characterized in that: It also includes a catalyst tank 2, the upper part of which is connected to a charging pipeline 2 and a catalyst reflux pipeline 2, and a connecting pipeline is provided between the catalyst reflux pipeline 1 and the catalyst reflux pipeline 2; The bottom of the catalyst tank 2 is connected to a catalyst discharge pipeline 2, and the catalyst discharge pipeline 2 is connected to a catalyst reflux pipeline 2. The catalyst discharge pipeline 2 is connected to valve 5, vent pipeline 2, sieve plate 2, back-blowing air pipeline 2, valve 6 and valve 7 from top to bottom in sequence. A conveying air pipeline 2 is connected between valve 6 and valve 7. Valves 8 and 9 are provided on the catalyst reflux pipeline 2. Valve 10 is provided on the connecting pipeline. One end of the connecting pipeline is connected to the pipeline before valve 3 of the catalyst reflux pipeline 1, and the other end of the connecting pipeline is connected to the pipeline before valve 9 of the catalyst reflux pipeline 2.

3. The catalyst self-filtration recovery device for a petroleum refining catalytic system according to claim 2, characterized in that: The tops of the catalyst tank 1 and the catalyst tank 2 are both connected to vacuum lines through pipelines and valves, and silencers are installed on the vacuum lines.

4. A catalyst self-filtration recovery device for a petroleum refining catalytic system according to any one of claims 1 to 3, characterized in that: The sieve plate 1 and the catalyst discharge pipeline 1 are connected via a flange.

5. A catalyst self-filtration recovery device for a petroleum refining catalytic system according to any one of claims 1 to 3, characterized in that: A valve 11 and a pressure gauge 1 are installed on the air delivery pipeline 1.

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