CN212491623U - Fractionating tower bottom structure with in-tower filtering device - Google Patents
Fractionating tower bottom structure with in-tower filtering device Download PDFInfo
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- CN212491623U CN212491623U CN202020832430.0U CN202020832430U CN212491623U CN 212491623 U CN212491623 U CN 212491623U CN 202020832430 U CN202020832430 U CN 202020832430U CN 212491623 U CN212491623 U CN 212491623U
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Abstract
The utility model relates to a delay coking system technical field at coal system needle coke or oil system needle coke technology especially relates to a fractionating tower bottom structure with interior filter equipment of tower. Comprises a fractionating tower and a filtering device; the filtering device is arranged in the middle of the inner part of the tower bottom of the fractionating tower, the bottom of the filtering device is communicated with a mixed oil outlet pipe at the tower bottom, and the top of the filtering device is provided with a filter cap; the filter cap is positioned above the liquid level in the tower; the filtering device is composed of a plurality of filter short sections, the filter short sections are grates formed by metal filter screens or a plurality of metal round steel, and the filter short sections are connected through flanges. The device not only can effectively reduce the probability of blocking the inlet of a charging pump of the coking heating furnace, but also can prevent the bottom oil outlet of the fractionating tower from being blocked by coke powder from the source, thereby being beneficial to reducing the energy consumption of the device, reducing the maintenance frequency, prolonging the operation period of the device and ensuring the long-term stable and safe operation of the device.
Description
Technical Field
The utility model relates to a coal system needle coke or the delayed coking system technical field of oil system needle coke technology especially relates to a fractionating tower bottom structure with interior filter equipment of tower.
Background
In the delayed coking process, the raw material refined asphalt and high-temperature oil vapor from the top of a coking tower transfer mass and heat in a fractionating tower, by-products such as coking gas, coking light oil and coking heavy oil are fractionated from the top and the lateral line of the fractionating tower respectively, and the mixed oil is discharged from the bottom of the fractionating tower, pressurized by a charging pump of a coking heating furnace and then sent to the coking heating furnace. In the process, a charging pump and a fractionating tower of the coking heating furnace are key devices, and the normal operation of the coking heating furnace can be realized, so that the process plays an important role in ensuring the long-term continuous safe and stable operation of the whole device.
In the operation process of the delayed coking device, coking at the bottom of the fractionating tower is inevitable. On one hand, the coke powder is probably contained in the high-temperature oil vapor from the top of the coking tower and enters the fractionating tower along with the high-temperature oil vapor; on the other hand, the operation temperature of the bottom of the fractionating tower is high (about 320 ℃), and the process medium is easy to polymerize and coke due to the long-time high-temperature condition.
In order to ensure the stable operation of a fractionating tower and a charging pump of a coking heating furnace and avoid the blockage of a tower bottom oil outlet and a pump inlet caused by coking of the fractionating tower, the following two methods are generally adopted in the traditional coking process:
1. and a filter is arranged on a pipeline from the bottom oil outlet of the fractionating tower to the inlet of the pump. The method can prevent the inlet of the pump from being blocked to a certain extent, but has the defects of large appearance volume of a filter on a pipeline, large heat dissipation area, sticky and thick process medium due to temperature reduction, easy blockage of the filter, frequent cleaning, high labor intensity and severe operating environment. In addition, the filter is only arranged on the pipeline, so that the upstream of the filter, namely the oil outlet at the bottom of the fractionating tower cannot be blocked by coke powder, once the oil outlet is blocked, the pump cannot be used for pumping enough mixed oil, and the device cannot be operated safely and stably.
2. In order to prevent coking and coke powder deposition at the bottom of the fractionating tower, the liquid in the tower is disturbed by injecting circulating oil into the tower bottom, for example, one branch is separated from the charging pump of the coking heating furnace to an outlet pipeline of the coking heating furnace and returned to the tower bottom of the fractionating tower, so that the liquid at the tower bottom of the fractionating tower is always in a disturbed state. The method has the disadvantages of high operation cost, and the pressurized mixed oil returns to the fractionating tower, thereby reducing the efficiency of the charging pump of the coking heating furnace and being not beneficial to energy conservation.
SUMMERY OF THE UTILITY MODEL
For overcoming the not enough of above-mentioned prior art, the utility model provides a fractionating tower column bottom structure with filter equipment in tower can not only reduce coking heating furnace charging pump's entry jam probability effectively, prevents in addition from the source that fractionating tower column bottom oil exit from being blockked up by the fine coke, is favorable to the device to reduce the energy consumption, reduces and overhauls the frequency, and extension device operation cycle guarantees the long-term stable safe operation of device.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a fractionating tower bottom structure with a filtering device in a tower comprises a fractionating tower and a filtering device; the filtering device is arranged in the middle of the inner part of the tower bottom of the fractionating tower, the bottom of the filtering device is communicated with a mixed oil outlet pipe at the tower bottom, and the top of the filtering device is provided with a filter cap; the filter cap is positioned above the liquid level in the tower; the filtering device is composed of a plurality of filter short sections, the filter short sections are grates formed by metal filter screens or a plurality of metal round steel, and the filter short sections are connected through flanges.
The bottom side wall of the fractionating tower is provided with a manhole.
The fractionating tower is equipped with a plurality of along the high to examining and repairing to marking time at the tower inner wall, and the height of examining and repairing marking time of top is not less than the height of filter cap.
The bottom side wall of the fractionating tower is provided with an upper liquid level meter interface and a lower liquid level meter interface, and the upper liquid level meter interface is positioned above the liquid level in the tower.
And a vent hole and a standby hole are formed in the bottom of the fractionating tower.
Compared with the prior art, the beneficial effects of the utility model are that:
1) the utility model discloses in with the filter between the coking heating furnace charging pump of fractionating tower bottom miscella export, set up outside the tower by traditional way, namely on the pipeline between the pump entry from the tower export, change into and set up in the tower, can avoid the fractionating tower bottom to gather and block up because of the fine coke at the exit of miscella at the tower bottom, thus influence the normal operating of pump;
2) the traditional filter is arranged on a pipeline, the heat dissipation area of the filter is large, a process medium is sticky due to temperature reduction and is easy to cause filter blockage, the filter is arranged in a tower, and a filter screen with a filtering function in a filtering device is soaked in hot oil at the bottom of the tower, so that the heat dissipation problem of the filter is completely avoided;
3) compared with a pipeline filter outside the tower, the filter is arranged in the tower, so that the cleaning frequency of the filter can be effectively reduced, and the labor intensity of operators is reduced;
4) the whole structure is simple, the investment is saved, the operation and the maintenance are convenient, and the implementation is easy.
Drawings
Fig. 1 is a schematic structure and a schematic process diagram of the present invention.
In the figure: 1-fractionating tower 2-tray 3-filter short section 4-filter cap 5-flange 6-inspection step A1-raw material refined asphalt inlet A2-high temperature oil gas inlet B1-mixed oil outlet L1-upper liquid level meter interface L2-lower liquid level meter interface M1-manhole D1-vent S1-spare port
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:
as shown in fig. 1, a fractionating tower bottom structure with a filtering device in the tower comprises a fractionating tower 1 and the filtering device. The filtering device is arranged in the middle of the inner part of the bottom of the fractionating tower 1, the bottom of the filtering device is communicated with a mixed oil outlet pipe B1 at the bottom of the tower, and the top of the filtering device is provided with a filter cap 4; the filter cap 4 is located above the liquid level in the column.
The filtering device is composed of a plurality of filter short sections 3, the filter short sections 3 are grates formed by metal filter screens or a plurality of metal round steel, and the filter short sections 3 are connected through flanges 5.
The bottom side wall of the fractionating tower 1 is provided with a manhole M1. The fractionating tower 1 is provided with a plurality of maintenance steps 6 along the height direction on the inner wall of the tower, and the height of the uppermost maintenance step is not lower than that of the filter cap 4.
The side wall of the bottom of the fractionating tower 1 is provided with an upper liquid level meter interface and a lower liquid level meter interface, wherein the upper liquid level meter interface and the lower liquid level meter interface are respectively an upper liquid level meter interface L1 and a lower liquid level meter interface L2, and the upper liquid level meter interface L1 is positioned above the liquid level in the tower.
The bottom of the fractionating tower 1 is provided with a vent D1 and a spare port S1.
High-temperature oil gas from the coking tower enters the fractionating tower 1 from a high-temperature oil gas inlet A2, and carries out mass and heat transfer on a tray 2 together with raw material refined asphalt entering the fractionating tower 1 from a raw material refined asphalt inlet A1.
The top of the filtering device is provided with a filter cap 4 and is positioned above the liquid level in the tower, so that coke powder brought by high-temperature oil vapor from the coking tower can be prevented from falling into the filter short section 3. The filter nipple 3 with the filtering function is completely soaked in hot oil in the tower, and the bottom of the filtering device is communicated with a tower bottom mixed oil outlet pipe B1, so that all mixed oil going to a coking heating furnace charging pump can be discharged through a tower bottom mixed oil outlet B1 after being filtered by a filter screen on the filter nipple 3.
The filtering device is composed of a plurality of filter short sections 3, and the filter short sections 3 are connected through flanges 5, so that the installation, the disassembly and the cleaning and the maintenance are convenient.
The fractionating tower 1 is provided with a plurality of maintenance steps 6 along the height direction on the inner wall of the tower, and the bottom of the fractionating tower 1 is provided with a manhole M1 for equipment maintenance.
The upper level meter interface L1 and the lower level meter interface L2 are used for installing a level meter to detect the level of liquid in the fractionating tower 1. And a vent D1 arranged at the bottom of the fractionating tower 1 and used for venting or periodically discharging impurities such as coke powder particles deposited at the bottom in the fractionating tower 1 during shutdown and maintenance. The bottom of the fractionating tower 1 is provided with a spare port S1 for connecting steam or nitrogen when the equipment is started or stopped to purge the equipment.
The utility model discloses with the export of fractionating tower bottom miscella to the filter between the coking heating furnace charging pump, set up outside the tower by traditional way, export to the pipeline between the pump entry from the tower promptly, change into and set up in the tower, can avoid the fractionating tower bottom of the tower to gather because of the burnt powder and block up in the exit of miscella to influence the normal operating of pump. Traditional filter setting is on the pipeline, and filter heat radiating area is big, and the technology medium is sticky because of the temperature reduction, easily causes the filter jam, and establishes the filter in the tower, and the filter screen that plays the filtering action among the filter equipment soaks in the hot oil at the bottom of the tower, has avoided the heat dissipation problem of filter itself completely. Compared with a pipeline filter outside the tower, the filter is arranged in the tower, so that the cleaning frequency of the filter can be effectively reduced, and the labor intensity of operators is reduced. The utility model has the advantages of simple integral structure, investment saving, convenient operation and maintenance and easy implementation.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (5)
1. The utility model provides a fractionating tower column bottom structure with interior filter equipment of tower which characterized in that: comprises a fractionating tower and a filtering device; the filtering device is arranged in the middle of the inner part of the tower bottom of the fractionating tower, the bottom of the filtering device is communicated with a mixed oil outlet pipe at the tower bottom, and the top of the filtering device is provided with a filter cap; the filter cap is positioned above the liquid level in the tower; the filtering device is composed of a plurality of filter short sections, the filter short sections are grates formed by metal filter screens or a plurality of metal round steel, and the filter short sections are connected through flanges.
2. A fractionation column bottom structure with in-column filtration device according to claim 1, wherein: the bottom side wall of the fractionating tower is provided with a manhole.
3. A fractionation column bottom structure with in-column filtration device according to claim 1, wherein: the fractionating tower is equipped with a plurality of along the high to examining and repairing to marking time at the tower inner wall, and the height of examining and repairing marking time of top is not less than the height of filter cap.
4. A fractionation column bottom structure with in-column filtration device according to claim 1, wherein: the bottom side wall of the fractionating tower is provided with an upper liquid level meter interface and a lower liquid level meter interface, and the upper liquid level meter interface is positioned above the liquid level in the tower.
5. A fractionation column bottom structure with in-column filtration device according to claim 1, wherein: and a vent hole and a standby hole are formed in the bottom of the fractionating tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020832430.0U CN212491623U (en) | 2020-05-18 | 2020-05-18 | Fractionating tower bottom structure with in-tower filtering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020832430.0U CN212491623U (en) | 2020-05-18 | 2020-05-18 | Fractionating tower bottom structure with in-tower filtering device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212491623U true CN212491623U (en) | 2021-02-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020832430.0U Active CN212491623U (en) | 2020-05-18 | 2020-05-18 | Fractionating tower bottom structure with in-tower filtering device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212491623U (en) |
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2020
- 2020-05-18 CN CN202020832430.0U patent/CN212491623U/en active Active
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