A blowdown tower oil spill separation device

Abstract

The utility model relates to an oil dirt separation device of venting tower in oil dirt separation technical field, include: cyclone separator, it has at least two concentric circle setting cyclone chamber, and cyclone chamber is gradually reduced from below to above diameter step by step, the cyclone chamber middle part is equipped with tangential inlet, bottom has lower outlet, and top has upper outlet, and the upper outlet is linked together with the tangential inlet of cyclone chamber of adjacent upper layer, rotation subassembly has the rotation axis and drive motor of coaxial rotation connection in cyclone separator, the rotation axis axle body is along its axial direction and is equipped with a plurality of rotation vane with cyclone chamber one to one correspondence, wherein, the position of rotation axis between adjacent rotation vane is equipped with transmission; The utility model adopts concentric multistage cyclone chamber structure, and gradient rotating speed of cooperation rotation vane and transmission control forms high -strength, multilevel centrifugal field, effectively breaks oil -coke powder emulsification state.

Description

Technical Field

[0001] This utility model relates to the field of oil separation technology, and in particular to an oil separation device for an venting tower. Background Technology

[0002] In the petroleum refining process, the vent tower of a delayed coking unit is a key piece of equipment for handling the high-temperature oil and gas generated during the cold coking (hydraulic decoking) and steam blowing operations of the coke tower. This high-temperature oil and gas typically contains heavy oil, coke dust, and other impurities. Direct discharge would not only waste resources but also potentially cause serious environmental pollution. Therefore, how to efficiently separate oil and coke dust from the high-temperature oil and gas has become a pressing technical challenge for the industry.

[0003] Existing cyclone separators for oil spills generally employ a single-stage cyclone chamber design, which limits separation efficiency. In particular, they are less effective at separating heavily emulsified heavy oil and coke powder mixtures in high-temperature oil and gas (high temperature reduces the viscosity of the oil phase and narrows the density difference between the coke powder and the oil phase, making it difficult for a single cyclone to achieve efficient stratification, and the oil content of the coke powder remains high after separation).

[0004] To address this, we designed an oil-water separation device for venting towers. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, this utility model discloses an oil-sludge separation device for an venting tower.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An oil sludge separation device for an venting tower, comprising:

[0008] A cyclone separator has at least two concentric cyclone chambers, the diameter of which gradually decreases from bottom to top; each cyclone chamber has a tangential inlet in the middle, a lower outlet at the bottom, and an upper outlet at the top, and the upper outlet is connected to the tangential inlet of the adjacent upper cyclone chamber;

[0009] A rotating assembly has a rotating shaft and a drive motor coaxially rotatably connected to a cyclone separator. The rotating shaft has multiple rotating blades along its axial direction that correspond one-to-one with the cyclone chambers.

[0010] The rotating shaft is located between adjacent rotating blades and is equipped with a gearbox.

[0011] Furthermore, the upper outlet is connected to the tangential inlet of the adjacent upper swirling cavity via a spiral pipe, and the spiral direction of the spiral pipe is consistent with the swirling direction of the material.

[0012] Furthermore, the rotating shaft body is fixedly fitted with an annular rotating box at the intersection of two adjacent swirling cavities. The lower end of the annular rotating box is open, and the top of the annular rotating box is connected to the inner end of the rotating blade of the corresponding swirling cavity. A diversion channel is opened inside the rotating blade, and the opening on the inner side of the diversion channel is connected to the inner cavity of the annular rotating box.

[0013] Furthermore, the diversion channel is a triangular mesh oil distribution channel, and each corner is provided with an opening. The inner opening is connected to the inner cavity of the annular rotating box through a connecting pipe; the two outer openings are located on the same vertical line.

[0014] Furthermore, the drive motor is located at the upper end of the rotating shaft, and the transmission is a speed reducer.

[0015] Furthermore, the drive motor is located at the lower end of the rotating shaft, and the transmission is a speed increaser.

[0016] Furthermore, the diameter ratio of adjacent swirling cavities is 1.5 to 2:1.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. Employing a concentric multi-stage cyclone chamber structure, combined with rotating blades and a gradient speed controlled by a gearbox, a high-intensity, multi-layered centrifugal force field is formed, effectively breaking up the oil-coke powder emulsion. Tests show that the oil content of the coke powder can be stably reduced to 2.5%~3%, and the separation efficiency is improved by more than 40% compared to traditional single-stage cyclone technology.

[0019] 2. The rotating shaft is equipped with speed reducers or speed increasers in sections, allowing the rotation speed of different cyclone chambers to be adjusted according to the viscosity and flow rate of the material, thus avoiding energy waste. For example, the lower cyclone chamber uses high speed to separate high-viscosity oil, while the upper chamber uses a reduced speed for fine oil removal, resulting in an overall energy consumption reduction of 30% compared to a fixed-speed centrifuge. Attached Figure Description

[0020] Figure 1 This is a simplified structural diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the annular rotating box and the rotating blade in this utility model;

[0022] Figure 3 This is a cross-sectional view of the rotating blade in this utility model.

[0023] In the diagram: 1. Cyclone separator; 11. Cyclone chamber; 111. Tangential inlet; 112. Lower outlet; 113. Upper outlet; 2. Rotating assembly; 21. Rotating shaft; 22. Drive motor; 23. Rotating blades; 231. Diverting channel; 24. Gearbox; 3. Spiral pipe; 4. Annular rotating box; 5. Connecting pipe. Detailed Implementation

[0024] The present invention will be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if terms such as "upper", "lower", "front", "rear", "left", "right" indicate orientation or positional relationship, they are only corresponding to the drawings of this application for the convenience of describing the present invention. It should be understood that if terms such as "end", "side", "end portion", "side part", "lateral", "longitudinal", etc. indicate orientation or positional relationship, they are only corresponding to the length and width of the corresponding component. That is, "end" indicates the head and tail area in the length direction of the corresponding component, and "side part" indicates the head and tail area in the width direction of the corresponding component. They are used for the convenience of describing the present invention and do not indicate or imply that the device or element referred to must have a specific orientation.

[0025] An oil sludge separation device for an venting tower includes a cyclone separator 1, a rotating assembly 2, and an annular rotating box 4.

[0026] The cyclone separator 1 has at least two concentric cyclone chambers 11, and the diameter of the cyclone chambers 11 gradually decreases from bottom to top; the cyclone chamber 11 has a tangential inlet 111 in the middle, a lower outlet 112 at the bottom, and an upper outlet 113 at the top, and the upper outlet 113 is connected to the tangential inlet 111 of the adjacent upper cyclone chamber 11.

[0027] The rotating assembly 2 has a rotating shaft 21 and a drive motor 22 that are coaxially rotatably connected to the cyclone separator 1. The rotating shaft 21 has a plurality of rotating blades 23 that correspond one-to-one with the cyclone chambers 11 along its axial direction.

[0028] The rotating shaft 21 is located between adjacent rotating blades 23 and a gearbox 24 is provided.

[0029] Example 1, in conjunction with Appendix Figure 1-3 An oil sludge separation device for an venting tower includes a cyclone separator 1, a rotating assembly 2, and an annular rotating box 4.

[0030] The cyclone separator 1 consists of three concentric cylindrical cyclone chambers 11, with the diameter decreasing from bottom to top, and the diameter ratio being 1.8:1.

[0031] In some possible examples, the lower swirl chamber has a diameter of 900 mm, the middle chamber 540 mm, and the upper chamber 300 mm.

[0032] Each swirling chamber 11 has a tangential inlet 111 on its sidewall, a lower outlet 112 at the bottom, and an upper outlet 113 at the top. The upper outlet 113 is connected to the adjacent upper-layer tangential inlet 111 via a spiral pipe 3, the spiral direction of which is consistent with the material swirling direction (e.g., right-handed). In other words, the upper outlet 113 of the lowest-level swirling chamber 11 is connected to the tangential inlet 111 of the second-level swirling chamber 11 via the spiral pipe 3.

[0033] As needed, the pitch is twice the pipe diameter to maintain the efficiency of swirling kinetic energy transfer.

[0034] The rotating assembly 2 includes a rotating shaft 21, a drive motor 22, and rotating blades 23. The rotating shaft 21 passes through the three-stage swirling chamber 11, and a set of rotating blades 23 is installed on each stage of the shaft (in this example, there are 6 blades per stage with an inclination angle of 30°). A reducer 24 is provided between adjacent blade sets to form a gradient swirling field and enhance the separation effect. The drive motor 22 is located at the upper end of the rotating shaft 21.

[0035] In some possible examples, the blade rotation speed of the lower swirl chamber is 1200 r / min, the middle layer is 800 r / min, and the upper layer is 500 r / min.

[0036] A rotating shaft 21 is fixedly fitted with an annular rotating box 4 at the intersection of adjacent swirling chambers 11. The lower end of the rotating shaft 21 is open, and the top end is connected to the inner end of the corresponding rotating blade 23. A triangular mesh-like diversion channel 231 is opened inside the rotating blade 23, and the inner opening is connected to the inner cavity of the annular rotating box 4 through a connecting pipe 5.

[0037] In other words, the apex of the triangular mesh-like diversion channel 231 faces the rotation axis 21, and the bottom edge is parallel to the side wall of the corresponding swirling cavity 11.

[0038] In some possible examples, each triangle apex has an opening with a diameter of 5 mm, and the connecting tube has an inner diameter of 8 mm.

[0039] Workflow

[0040] Heavy oil containing coke powder enters tangentially from the lower cyclone chamber at inlet 111. Under the action of the high-speed rotating blades 23, a centrifugal force field is formed, causing initial separation of the coke powder and oil phase. The oil phase enters the middle cyclone chamber 11 through the upper outlet 113, the spiral pipe 3, and the triangular mesh-like diversion channel 231, where it undergoes further separation before entering the upper layer. During the separation process, the coke powder settles along the cyclone chamber wall to the lower outlet 112 and is discharged (oil content ≤3%), while the purified oil phase exits from the upper outlet 113.

[0041] Example 2, in conjunction with Appendix Figure 1-3An oil separation device for an venting tower, which differs from Embodiment 1 in that: the drive motor 22 is located at the lower end of the rotating shaft 21, the diameter ratio of adjacent swirling chambers is 2:1, the gearbox 24 is replaced by a speed increaser, the blade speed of the lower swirling chamber is 1000 r / min, the middle layer is 1500 r / min, and the upper layer is 2000 r / min, which is suitable for the rapid separation of high-viscosity oil (dynamic viscosity > 500 mPa·s).

[0042] It should be noted that the drive motor 22, the transmission 24, and the control system of the entire system all adopt existing technologies, and their structure, installation, and principles will not be described again here.

[0043] Tests have shown that when this device is used in a delayed coking venting tower, the oil content of the coke powder can be stably controlled to 2.5%~3%, energy consumption is reduced by 30% compared with traditional centrifugal separation, and there is no clogging phenomenon after 200 hours of continuous operation.

[0044] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the above embodiments should be regarded as exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended to include all changes that fall within the meaning and scope of the equivalents of the claims in this utility model, and no reference numerals in the claims should be regarded as limiting the content of the claims.

Claims

1. An oil-water separation device for a venting tower, characterized in that: include: A cyclone separator (1) has at least two concentric cyclone chambers (11) with the diameter of each cyclone chamber (11) decreasing from bottom to top. Each cyclone chamber (11) has a tangential inlet (111) in the middle, a lower outlet (112) at the bottom, and an upper outlet (113) at the top. The upper outlet (113) is connected to the tangential inlet (111) of the adjacent upper cyclone chamber (11). The rotating assembly (2) has a rotating shaft (21) coaxially rotatably connected to the cyclone separator (1) and a drive motor (22). The rotating shaft (21) has a plurality of rotating blades (23) that correspond one-to-one with the cyclone chamber (11) along its axial direction. The rotating shaft (21) is located between adjacent rotating blades (23) and a gearbox (24) is provided.

2. The venting tower oil-water separation device according to claim 1, characterized in that: The upper outlet (113) is connected to the tangential inlet (111) of the adjacent upper swirling cavity (11) through a spiral pipe (3), and the spiral direction of the spiral pipe (3) is consistent with the swirling direction of the material.

3. The venting tower oil-sludge separation device according to claim 1, characterized in that: The rotating shaft (21) is fixedly fitted with an annular rotating box (4) at the intersection of two adjacent swirling chambers (11). The lower end of the annular rotating box (4) is open, and the top of the annular rotating box (4) is connected to the inner end of the rotating blade (23) of the corresponding swirling chamber (11). A diversion channel (231) is opened inside the rotating blade (23), and the opening on the inner side of the diversion channel (231) is connected to the inner cavity of the annular rotating box (4).

4. The venting tower oil-water separation device according to claim 3, characterized in that: The diversion channel (231) is a triangular mesh oil distribution channel, and each corner is provided with an opening. The inner opening is connected to the inner cavity of the annular rotating box (4) through the connecting pipe (5); the two outer openings are located on the same vertical line.

5. The venting tower oil-sludge separation device according to claim 1, characterized in that: The drive motor (22) is located at the upper end of the rotating shaft (21), and the gearbox (24) is a reducer.

6. The venting tower oil-sludge separation device according to claim 1, characterized in that: The drive motor (22) is located at the lower end of the rotating shaft (21), and the transmission (24) is a speed increaser.

7. The venting tower oil-sludge separation device according to claim 1, characterized in that: The diameter ratio of adjacent swirling cavities (11) is 1.5~2:1.

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