Fluidized bed flushing dirty oil recycling system

Abstract

The utility model belongs to the technical field of flushing oil recovery, and relates to a boiling bed flushing dirty oil recycling system which comprises a conveying oil tank, a boiling bed reactor, an agent unloading tank and a flushing oil recovery pipe, the conveying oil tank, the fluidized bed reactor and the agent unloading tank are sequentially communicated, and the agent unloading tank is further communicated with the conveying oil tank through a flushing oil recovery pipe; the conveying oil tank is externally connected with an oil conveying header pipe; and the flushing oil recovery pipe is communicated with the conveying oil tank through an oil conveying main pipe. According to the utility model, by arranging the flushing oil recovery pipe, the flushing dirty oil generated in the catalyst unloading process of the fluidized bed reactor is recovered into the conveying oil tank, and diesel oil in the flushing dirty oil is recycled, so that resources are saved, the generation of heavy dirty oil is reduced, and the treatment difficulty is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of flushing oil recovery and relates to a fluidized bed flushing waste oil recovery and utilization system. Background Art

[0002] The fluidized bed reactor is a commonly used catalytic cracking reactor used in the petrochemical industry. The basic principle of the fluidized bed reactor is that by fixing the catalyst on a support in the reactor, bubbles are generated on the support and the liquid continuously surges, thereby providing sufficient material transfer and promoting the reaction. However, since the life cycle of the catalyst affects its catalytic activity, the catalyst needs to be replaced regularly to ensure the normal operation of the reactor.

[0003] When the catalyst of the ebullating bed is unloaded, the catalyst is unloaded from the ebullating bed by flushing method, and a large amount of flushing waste oil will be generated in this process; the current treatment method is to discharge the flushing waste oil directly into the heavy oil tank for direct discharge or treatment, but since the flushing waste oil contains a large amount of diesel, direct discharge will cause waste of resources; if the heavy oil is treated, refer to the Chinese patent document with announcement number CN221397809U, which discloses a heavy oil treatment system, which needs to undergo two ultrasonic demulsifications to completely break up the oil-in-water emulsion in the heavy oil, and can quickly separate oil, mud and water to complete the three-phase separation of the heavy oil. It can be seen that the existing heavy oil treatment process is complicated, and a large amount of flushing waste oil is discharged into the heavy oil, which increases the amount of heavy oil, thereby increasing the difficulty of heavy oil treatment. Utility Model Content

[0004] Aiming at the technical problems of waste of resources and great difficulty in treating heavy dirty oil in the existing dirty oil flushing, the utility model provides a fluidized bed dirty oil flushing recovery and utilization system.

[0005] The utility model recovers the flushing waste oil generated in the catalyst unloading agent of the fluidized bed reactor into a conveying oil tank by arranging a flushing oil recovery pipe, and then reuses it in the fluidized bed reactor, so as to recycle the diesel in the flushing waste oil, save resources, reduce the generation of heavy waste oil, and reduce the difficulty of treatment.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A fluidized bed flushing waste oil recovery and utilization system comprises a conveying oil tank, a fluidized bed reactor, an agent unloading tank and a flushing oil recovery pipe; the conveying oil tank, the fluidized bed reactor and the agent unloading tank are connected in sequence, and the agent unloading tank is also connected to the conveying oil tank through the flushing oil recovery pipe.

[0008] It is further defined that the oil delivery tank is externally connected to an oil delivery main pipe; the flushing oil recovery pipe is connected to the oil delivery tank via the oil delivery main pipe.

[0009] It is further defined that a flushing dirty oil pump is provided on the flushing oil recovery pipe.

[0010] It is further defined that a flushing oil recovery control valve is also provided on the flushing oil recovery pipe; the flushing oil recovery control valve is provided close to the delivery oil tank.

[0011] It is further defined that the fluidized bed flushing waste oil recovery and utilization system also includes a delivery oil pump arranged between the delivery oil tank and the fluidized bed reactor.

[0012] It is further defined that an oil delivery regulating valve is provided between the oil delivery pump and the fluidized bed reactor.

[0013] It is further defined that the fluidized bed flushing waste oil recovery system also includes a flushing waste oil tank, and the unloading tank is connected to the delivery oil tank through the flushing waste oil tank and the flushing oil recovery pipe.

[0014] It is further defined that the fluidized bed flushing waste oil recovery and utilization system also includes a filtering unit arranged between the unloading agent tank and the flushing waste oil tank.

[0015] It is further defined that the filtering unit includes a first flushing oil control valve and a first filter; the unloading agent tank is connected to the flushing dirty oil tank via the first flushing oil control valve and the first filter in sequence.

[0016] It is further defined that the filtering unit also includes a second flushing oil control valve and a second filter; one end of the second flushing oil control valve is respectively connected to the first flushing oil control valve and the unloading tank; the other end of the second flushing oil control valve is connected to the second filter, and the second filter is also respectively connected to the first filter and the flushing dirty oil tank.

[0017] The beneficial effects of the utility model are:

[0018] 1. In the utility model, the conveying oil tank, the fluidized bed reactor and the agent unloading tank are connected in sequence, and the agent unloading tank is also connected to the conveying oil tank through a flushing oil recovery pipe; by setting the flushing oil recovery pipe, the flushing waste oil generated in the catalyst unloading of the fluidized bed reactor is recovered into the conveying oil tank, and then reused in the fluidized bed reactor, and the diesel in the flushing waste oil is recycled, so as to save resources, reduce the generation of heavy waste oil, and reduce the difficulty of treatment.

[0019] 2. In the utility model, by providing a flushing waste oil pump, the waste oil can be quickly recovered into the transport oil tank; by providing a flushing oil recovery control valve, the flow rate of the recovered waste oil can be regulated according to the amount of diesel in the transport oil tank, thereby ensuring stable operation of the system.

[0020] 3. In the utility model, by setting up an oil delivery pump, it is convenient to quickly pressurize and deliver the diesel in the delivery oil tank to the fluidized bed reactor; further, a delivery oil regulating valve is set between the oil delivery pump and the fluidized bed reactor, which can not only regulate the speed of diesel delivery, but also ensure the stability of the liquid level in the fluidized bed reactor in the catalyst unloading, thereby ensuring the smooth unloading of the catalyst.

[0021] 4. In the utility model, a flushing dirty oil tank is provided between the conveying oil tank and the unloading agent tank to facilitate the storage of dirty oil; further, a filtering unit is provided between the unloading agent tank and the flushing dirty oil tank to facilitate filtering out the catalyst powder in the dirty oil, thereby preventing the problem of equipment blockage caused by residual catalyst powder and ensuring the normal operation of the entire system.

[0022] 5. The utility model not only improves the filtration efficiency of the flushing oil by setting the first filter and the second filter in parallel, but also can flexibly switch according to the amount of dirty oil generated in the whole system, and the operation is convenient and simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of a system for recycling waste oil from flushing provided in Example 1;

[0024] Figure 2 A schematic diagram of a system for recycling waste flushing oil provided in Example 2;

[0025] in:

[0026] V114-transfer oil tank, P104-transfer oil pump, R101-boiling bed reactor, V113-drug unloading tank, V112-flushing waste oil tank, P105-flushing waste oil pump; 100-oil main pipe; 200-flushing oil recovery pipe; 300-transfer oil regulating valve; 400-first flushing oil control valve; 500-first filter; 600-second flushing oil control valve; 700-second filter; 800-flushing oil recovery control valve. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0028] Example 1

[0029] See also Figure 1The fluidized bed flushing waste oil recovery and utilization system provided in this embodiment includes a conveying oil tank V114, a fluidized bed reactor R101, a discharging agent tank V113 and a flushing oil recovery pipe 200; the conveying oil tank V114, the fluidized bed reactor R101 and the discharging agent tank V113 are connected in sequence, and the discharging agent tank V113 is also connected to the conveying oil tank V114 through the flushing oil recovery pipe 200.

[0030] In this embodiment, the ebullated bed reactor R101 mainly performs hydrodesulfurization, denitrification, deoxygenation, demetallization and other reactions, as well as hydrogenation of unsaturated hydrocarbons. The function of the oil delivery tank V114 is to deliver diesel to the ebullated bed reactor R101, and the function of the unloading tank V113 is to store the catalyst and flushing waste oil (also called flushing oil) flushed and unloaded from the ebullated bed reactor R101.

[0031] In this embodiment, the oil delivery tank V114 is externally connected to an oil delivery main pipe 100; the flushing oil recovery pipe 200 is connected to the oil delivery tank V114 via the oil delivery main pipe 100.

[0032] The fluidized bed flushing waste oil recovery and utilization system provided in this embodiment also includes an oil delivery pump P104 arranged between the oil delivery tank V114 and the fluidized bed reactor R101; diesel is delivered to the fluidized bed reactor R101 through the oil delivery pump P104.

[0033] In this embodiment, a flushing waste oil pump P105 is provided on the flushing oil recovery pipe 200; the flushing waste oil pump P105 returns the flushing oil in the unloading agent tank V113 to the delivery oil tank V114 for recycling.

[0034] The fluidized bed flushing waste oil recovery and utilization system provided in this embodiment also includes a flushing waste oil tank V112, and the unloading agent tank V113 is connected to the conveying oil tank V114 via the flushing waste oil tank V112 and the flushing oil recovery pipe 200.

[0035] In this embodiment, the function of the flushing waste oil tank V112 is to collect the flushing waste oil (i.e., flushing oil) transported from the agent unloading tank V113. During implementation, since the catalyst is at the lower part of the agent unloading tank V113 and the flushing oil is at the upper part of the agent unloading tank V113, an overflow port is provided at the upper part of the agent unloading tank V113 so that the flushing oil can overflow into the flushing waste oil tank V112 for storage, and then be recycled to the transport oil tank V114 through the flushing oil recovery pipe 200 for recycling.

[0036] The utility model provides a fluidized bed flushing waste oil recovery and utilization system, and its working process is:

[0037] During the unloading process of the ebullated bed catalyst, the catalyst and flushing oil from the ebullated bed reactor R101 are all stored in the unloading tank V113, the catalyst and the flushing oil are layered, and the upper flushing oil overflows from the upper part of the unloading tank V113 to the flushing oil tank V112 for storage. The flushing oil is collected into the oil main pipe 100 through the flushing oil recovery pipe 200 and the provided flushing oil pump P105, and enters the delivery oil tank V114 through the oil main pipe 100, so that the flushing oil and the diesel in the oil main pipe 100 are mixed, and then enter the ebullated bed reactor R101 through the delivery oil pump P104 for recycling. Through the constructed flushing oil recovery and utilization system, the diesel in the flushing oil can be reused, saving resources and costs; reducing the generation of heavy dirty oil and reducing the difficulty of treatment.

[0038] Example 2

[0039] See also Figure 2 On the basis of Example 1, in the fluidized bed flushing waste oil recovery and utilization system provided in this embodiment, a delivery oil regulating valve 300 is arranged between the delivery oil pump P104 and the fluidized bed reactor R101; on the one hand, during the reaction process, the amount of diesel delivered to the fluidized bed reactor R101 is controlled by the delivery oil regulating valve 300; on the other hand, during the catalyst unloading process, the flow rate of the delivery oil regulating valve 300 is adjusted according to the catalyst unloading speed, so that the liquid level in the fluidized bed reactor R101 is stable, which is conducive to the catalyst unloading.

[0040] In this embodiment, a flushing oil recovery control valve 800 is also provided on the flushing oil recovery pipe 200; the flushing oil recovery control valve 800 is provided close to the oil delivery tank V114. That is, the pump outlet of the flushing waste oil pump P105 is connected to the oil delivery tank V114 via the flushing oil recovery control valve 800. By providing the flushing oil recovery control valve 800, in the process of the flushing oil returning to the oil delivery tank V114, the opening of the flushing oil recovery control valve 800 can be controlled according to the amount of diesel in the oil delivery tank V114, thereby controlling the return amount of the flushing oil and ensuring the stability of the system pressure. For example, if the amount of diesel in the oil delivery tank V114 is small, the opening of the flushing oil recovery control valve 800 is increased to increase the recovery amount of the flushing oil, so that the flushing oil is quickly recovered to the oil delivery tank V114.

[0041] The fluidized bed flushing waste oil recovery and utilization system provided in this embodiment further comprises a filtering unit disposed between the unloading agent tank V113 and the flushing waste oil tank V112. The filtering unit can remove the catalyst powder in the flushing oil overflowing from the unloading agent tank V113.

[0042] In this embodiment, the filtering unit includes a first flushing oil control valve 400 and a first filter 500; the unloading agent tank V113 is connected to the flushing dirty oil tank V112 via the first flushing oil control valve 400 and the first filter 500 in sequence.

[0043] Since the catalyst and flushing oil (also called flushing oil) are stored in the unloading tank V113, they are stratified in the unloading tank V113. However, the upper flushing oil will contain catalyst powder. At this time, the first flushing oil control valve 400 is opened, and the upper flushing oil from the unloading tank V113 enters the first filter 500. The catalyst powder is filtered out through the filter screen provided in the first filter 500, and the clean flushing oil enters the flushing oil tank V112. The filtered catalyst powder is discharged from the first filter 500 outside the system for unified collection and treatment, so as to ensure the purity of the return transport oil tank V114 and avoid clogging of the equipment by the catalyst powder.

[0044] In this embodiment, the filtering unit also includes a second flushing oil control valve 600 and a second filter 700; one end of the second flushing oil control valve 600 is respectively connected to the first flushing oil control valve 400 and the unloading tank V113; the other end of the second flushing oil control valve 600 is connected to the second filter 700, and the second filter 700 is also respectively connected to the first filter 500 and the flushing dirty oil tank V112.

[0045] In this embodiment, the second filter 700 is arranged in parallel with the first filter 500 and has the same working process; both are for filtering out the catalyst powder in the upper flushing oil coming out of the unloading tank V113 to prevent the catalyst powder from entering the subsequent equipment and ensure the stable operation of the entire system.

[0046] During use, when the pressure of the entire system is normal (the amount of flushing oil discharged from the fluidized bed reactor R101 is normal), the first filter 500 and the second filter 700 are used as a backup; they are switched by the first flushing oil control valve 400 and the second flushing oil control valve 600, that is, when the first filter 500 is used, the first flushing oil control valve 400 is opened and the second flushing oil control valve 600 is closed; conversely, when the second filter 700 is used, the second flushing oil control valve 600 is opened and the first flushing oil control valve 400 is closed. However, when the pressure of the system is high (the amount of flushing oil discharged from the fluidized bed reactor R101 is large), the first flushing oil control valve 400 and the second flushing oil control valve 600 are opened at the same time, and the first filter 500 and the second filter 700 filter at the same time.

[0047] The above descriptions are only several preferred implementations of the utility model, and are not intended to limit the protection scope of the utility model patent. Any equivalent structure or equivalent process transformation made using the contents of the utility model specification and drawings, or directly or indirectly used in other related technical fields, are also included in the protection scope of the utility model.

Claims

1. A fluidized bed flushing waste oil recovery and utilization system, characterized in that: It comprises a conveying oil tank (V114), a fluidized bed reactor (R101), a solvent unloading tank (V113) and a flushing oil recovery pipe (200); the conveying oil tank (V114), the fluidized bed reactor (R101) and the solvent unloading tank (V113) are connected in sequence, and the solvent unloading tank (V113) is also connected to the conveying oil tank (V114) through the flushing oil recovery pipe (200).

2. The fluidized bed flushing waste oil recovery and utilization system according to claim 1 is characterized in that: The oil delivery tank (V114) is externally connected to an oil delivery main pipe (100); the flushing oil recovery pipe (200) is connected to the oil delivery tank (V114) via the oil delivery main pipe (100).

3. The fluidized bed flushing waste oil recovery and utilization system according to claim 2 is characterized in that: A flushing dirty oil pump (P105) is provided on the flushing oil recovery pipe (200).

4. The fluidized bed flushing waste oil recovery and utilization system according to claim 3 is characterized in that: A flushing oil recovery control valve (800) is also provided on the flushing oil recovery pipe (200); the flushing oil recovery control valve (800) is provided close to the delivery oil tank (V114).

5. The fluidized bed flushing waste oil recovery and utilization system according to claim 1 is characterized in that: The fluidized bed flushing waste oil recovery and utilization system further comprises an oil delivery pump (P104) arranged between the oil delivery tank (V114) and the fluidized bed reactor (R101).

6. The fluidized bed flushing waste oil recovery and utilization system according to claim 5 is characterized in that: An oil delivery regulating valve (300) is provided between the oil delivery pump (P104) and the fluidized bed reactor (R101).

7. The fluidized bed flushing waste oil recovery and utilization system according to any one of claims 1 to 6, characterized in that: The fluidized bed flushing waste oil recovery and utilization system also includes a flushing waste oil tank (V112), and the unloading agent tank (V113) is connected to the conveying oil tank (V114) via the flushing waste oil tank (V112) and the flushing oil recovery pipe (200).

8. The fluidized bed flushing waste oil recovery and utilization system according to claim 7 is characterized in that: The fluidized bed flushing waste oil recovery and utilization system further comprises a filtering unit arranged between the unloading agent tank (V113) and the flushing waste oil tank (V112).

9. The fluidized bed flushing waste oil recovery and utilization system according to claim 8 is characterized in that: The filtering unit comprises a first flushing oil control valve (400) and a first filter (500); the unloading agent tank (V113) is connected to the flushing dirty oil tank (V112) via the first flushing oil control valve (400) and the first filter (500) in sequence.

10. The fluidized bed flushing waste oil recovery and utilization system according to claim 9, characterized in that: The filtering unit further comprises a second flushing oil control valve (600) and a second filter (700); one end of the second flushing oil control valve (600) is respectively connected to the first flushing oil control valve (400) and the agent removal tank (V113); the other end of the second flushing oil control valve (600) is connected to the second filter (700), and the second filter (700) is also respectively connected to the first filter (500) and the flushing waste oil tank (V112).

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