CN216688024U - Coking device is prevented to coke tower top oil gas pipeline - Google Patents
Coking device is prevented to coke tower top oil gas pipeline Download PDFInfo
- Publication number
- CN216688024U CN216688024U CN202122690906.9U CN202122690906U CN216688024U CN 216688024 U CN216688024 U CN 216688024U CN 202122690906 U CN202122690906 U CN 202122690906U CN 216688024 U CN216688024 U CN 216688024U
- Authority
- CN
- China
- Prior art keywords
- oil
- gas pipeline
- flange
- coke tower
- nozzle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The utility model discloses an anti-coking device for a coke tower top oil-gas pipeline. This coke tower top oil gas pipeline anti-coking device includes oil gas pipeline cross (or tee bend), quench oil sleeve pipe, quench oil filling tube and nozzle, be equipped with flange and oil gas pipeline flange down on being responsible for of oil gas pipeline cross (or tee bend) on the oil gas pipeline cross (or tee bend), be responsible for through flange and coke drum outlet pipeline intercommunication under the oil gas pipeline, quench oil sleeve pipe passes the trompil on the oil gas pipeline upper flange lid and gos deep into in being responsible for of oil gas pipeline, quench oil filling tube passes quench oil sleeve pipe downwards, and be connected through the flange with quench oil sleeve pipe upper end, quench oil filling tube bottom is equipped with the nozzle, the nozzle bottommost is located the branch pipe top of oil gas pipeline cross (or tee bend). The utility model can avoid high-speed high-temperature oil gas impact, achieve better mixing and cooling effects, and is easy to disassemble and clean.
Description
Technical Field
The utility model belongs to the field of coking in the petroleum processing process, and relates to an anti-coking device for a coke tower top oil-gas pipeline.
Background
In petroleum processing, the delayed coking process is an important residual oil (heavy oil) processing procedure. The raw material is heated to about 500 ℃ by a heat exchange and coking furnace, and then enters a coke tower to carry out thermal cracking reaction and condensation reaction, and oil gas and solid coke are generated in the coke tower. Oil gas generated by the thermal cracking reaction enters a fractionating tower through an oil gas line at the top of the coke tower and is separated into rich gas and fractions such as naphtha, diesel oil, wax oil and the like. Solid coke is deposited in the coke drum and periodically decoked to the coke pool. The production of the coke tower is intermittent operation, raw materials heated by the heating furnace enter one coke tower (production tower) for coke formation, and an operator simultaneously carries out the treatment processes of blowing, coke cooling, coke cutting, air driving pressure testing, tower warming and the like on the other tower (treatment tower). Then the feed is switched to a new production tower (original treatment tower) through a four-way valve, and the switching is repeated in such a way, so that the production is continuously carried out.
When the coke tower is produced, the temperature of oil gas at the top of the tower is more than or equal to 440 ℃, when the oil gas flows through a large oil-gas line at the top of the tower, the coking reaction is continuously carried out, so that the oil-gas line is coked, and even the bottom of the fractionating tower is coked. The pressure drop of pipeline blockage caused by coking of the oil-gas line is increased, the operating pressure of a coke tower is increased, so that the coke amount is increased, the yield of a coking liquid product is reduced, and the economic benefit of the device is reduced. When the coking is serious, the pipeline needs to be dismantled for coke cleaning, which affects the normal operation and production. In order to solve the problem of coking of an oil-gas line, quenching oil needs to be injected at an outlet of the oil-gas line, the oil gas is rapidly cooled to below 415 ℃, and the coking reaction is stopped.
The current general method is to inject quenching oil at three points (or four points) uniformly distributed in a ring shape at the inlet of an oil-gas line. The method has the defects that the mixing and cooling effect of the quenching oil and the oil gas is poor, and the oil gas is not fully cooled. The problem of gas line coking is improved, but still not completely eliminated.
Chinese patent CN101343553A discloses a device for preventing coking at the oil gas outlet of a coke drum. The anti-coking device adopts two-stage quench oil injection, the first-stage injection facility is positioned at an oil gas outlet at the top of the coke tower and adopts a porous ring pipe or an atomizing nozzle; the second stage is located at the turning position (from vertical to horizontal) of the oil-gas pipeline, the four-way joint is provided with an atomizing nozzle and is provided with a vertical decoking flange and a lateral decoking flange. The device structure is complicated, though can realize regularly the coke cleaning, nevertheless when quench oil one-level injection apparatus or pipeline took place to block up, was difficult for the dismouting to clear up, and when second grade injection apparatus or pipeline blockked up, must dismantle big blind flange and clear up, and intensity of labour is high. The nozzle and the quenching oil injection pipeline are positioned in the oil-gas flow passage, and high-speed oil gas impacts the nozzle, so that the nozzle is easy to fall off and the quenching oil pipeline vibrates, and the oil injection stability is reduced.
Chinese patent CN202297497U discloses a coke oven gas-liquid line anti-coking device on the top of coke tower. The nozzle of the anti-coking device extends deep below the tee-joint lower flange of the oil-gas line, and the quenching oil is directly sprayed to the junction of the coke tower and the oil-gas line, so that the quenching device has a good quenching effect. However, the nozzle and the quenching oil pipeline of the anti-coking device are also positioned in the oil-gas overflowing channel, and the problems of nozzle falling and the vibration of the quenching oil pipeline caused by high-speed oil-gas impact on the nozzle exist.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an anti-coking device for a coke tower top oil-gas pipeline, which overcomes the defects of the existing quenching oil injection equipment, avoids high-temperature oil-gas impact passing at high speed and eliminates the coking problem of the oil-gas pipeline. The device of the utility model can not only effectively prevent the oil-gas pipeline from coking, but also avoid the impact of high-speed oil gas, and is easy to disassemble and assemble and convenient for coke cleaning.
The utility model provides a coke tower top oil gas pipeline anti-coking device, which is characterized in that: the coke tower top oil and gas pipeline anti-coking device comprises an oil and gas pipeline cross joint, a quenching oil sleeve, a quenching oil injection pipe and a nozzle, wherein the oil and gas pipeline cross joint is positioned on an outlet pipeline of a coke tower seal head and comprises a main pipe and a branch pipe, the main pipe of the oil and gas pipeline cross joint is vertically arranged, the main pipe of the oil and gas pipeline cross joint is provided with an upper flange of the oil and gas pipeline and a lower flange of the oil and gas pipeline, one branch pipe of the oil and gas pipeline cross joint is a horizontal oil and gas pipeline, the upper flange of the oil and gas pipeline is provided with a side flange of the oil and gas pipeline, the other branch pipe of the oil and gas pipeline cross joint is a coke cleaning port, the main pipe of the oil and gas pipeline cross joint is communicated with the outlet pipeline of the coke tower through the lower flange of the oil and gas pipeline and communicated with the horizontal oil and gas pipeline through the side flange of the oil and gas pipeline, the flange of the upper flange of the oil and gas pipeline is provided with an opening, the quenching oil and gas pipeline sleeve penetrates through the opening on the upper flange cover of the oil and the main pipe of the oil and gas pipeline cross joint, and is connected with flange cover on the oil gas pipeline, and quench oil filling tube passes quench oil sleeve pipe downwards to be connected through the flange with quench oil sleeve pipe upper end, quench oil filling tube bottom is equipped with the nozzle, and the nozzle bottommost is located the branch pipe top of oil gas pipeline cross.
The utility model provides a coke tower top oil gas pipeline anti-coking device, which is characterized in that: the coke tower top oil and gas pipeline anti-coking device comprises an oil and gas pipeline tee joint, a quenching oil sleeve, a quenching oil injection pipe and a nozzle, wherein the oil and gas pipeline tee joint is positioned on an outlet pipeline of a coke tower seal head and comprises a main pipe and a branch pipe, the main pipe of the oil and gas pipeline tee joint is vertically arranged, an upper flange of the oil and gas pipeline and a lower flange of the oil and gas pipeline are arranged on the main pipe of the oil and gas pipeline tee joint, the branch pipe of the oil and gas pipeline tee joint is a horizontal oil and gas pipeline, an oil and gas pipeline side flange is arranged on the branch pipe, the main pipe of the oil and gas pipeline tee joint is communicated with the outlet pipeline of the coke tower through the lower flange of the oil and gas pipeline and is communicated with the horizontal oil and gas pipeline through the oil and gas pipeline side flange, a flange cover of the upper flange of the oil and gas pipeline is provided with an opening, the quenching oil injection pipe penetrates through the quenching oil sleeve downwards, and is connected with the upper end of the quenching oil sleeve through a flange, the bottom of the quenching oil injection pipe is provided with a nozzle, and the bottommost end of the nozzle is positioned above a branch pipe of the oil-gas pipeline tee.
The quenching oil sleeve is connected with an upper flange cover of an oil and gas pipeline through welding.
The spray angle of the nozzle is 30-120 degrees.
Compared with the prior art, the coke tower top oil-gas pipeline anti-coking device has the effects that: 1) the quenching oil casing pipe extends to the upper part of the connecting part of the tee joint or the four-way joint of the oil-gas pipeline, namely the quenching oil casing pipe is positioned above the branch pipe of the tee joint or the four-way joint of the oil-gas pipeline, and a quenching medium is efficiently mixed with high-temperature oil gas, so that high-speed high-temperature oil gas impact can be avoided; 2) the quenching oil sleeve extends into the oil-gas pipeline above the tee joint or the four-way joint, and the quenching oil falls to the oil-gas main flow path by gravity, so that the phenomenon of quenching oil retention is avoided, and the retention time of the quenching oil is uniform; 3) the utility model selects proper spray included angle, the spray surface is close to and positioned at the three-way or four-way connection part, and the quenching oil is atomized and injected to the inlet of the oil-gas pipeline through the nozzle, so as to achieve better mixing and cooling effects; 4) the coke tower top oil and gas pipeline anti-coking equipment is a detachable structure, and a nozzle and a quenching oil injection pipe can be detached and drawn out for cleaning when necessary.
The utility model is described in further detail below with reference to the figures and the detailed description, without limiting the scope of the utility model.
Drawings
FIG. 1 is a schematic view of an anti-coking device for a coke tower top oil-gas pipeline.
The coke tower top oil gas pipeline anti-coking device in figure 1 adopts the four-way condition of the oil gas pipeline.
The reference numerals shown in the figures are:
1-oil gas pipeline four-way joint, 2-quenching oil casing pipe, 3-quenching oil injection pipe, 4-nozzle, 5-oil gas pipeline upper flange, 6-quenching oil pipeline flange, 7-coke cleaning port, 8-oil gas pipeline lower flange, 9-coke tower outlet pipeline, 10-coke tower, 11-horizontal oil gas pipeline and 12-oil gas pipeline side flange.
Detailed Description
The coke tower top oil and gas pipeline anti-coking device can adopt an oil and gas pipeline four-way joint or an oil and gas pipeline three-way joint.
FIG. 1 shows the coke tower top oil gas pipeline anti-coking device adopting the four-way oil gas pipeline. As shown in figure 1, the coke tower top oil gas pipeline anti-coking device comprises an oil gas pipeline cross 1, a quenching oil sleeve 2, a quenching oil injection pipe 3 and a nozzle 4, the oil gas pipeline cross 1 is positioned on a coke tower outlet pipeline 9 close to a coke tower 10 end socket, the oil gas pipeline cross 1 comprises a main pipe and a branch pipe, the main pipe of the oil gas pipeline cross 1 is vertically arranged, the main pipe of the oil gas pipeline cross 1 is provided with an oil gas pipeline upper flange 5 and an oil gas pipeline lower flange 8, one branch pipe of the oil gas pipeline cross 1 is a horizontal oil gas pipeline 11, an oil gas pipeline side flange 12 is arranged on the branch pipe, the other branch pipe of the oil gas pipeline cross 1 is a coke cleaning port 7, the main pipe of the oil gas pipeline cross 1 is communicated with the coke tower outlet pipeline 9 through the oil gas pipeline lower flange 8, and is communicated with the horizontal oil gas pipeline 11 through the oil gas pipeline side flange 12, and a flange cover of the oil gas pipeline upper flange 5 is provided with an opening, quench oil sleeve pipe 2 passes in the trompil of the last flange cover of oil gas pipeline goes deep into the main line of oil gas pipeline cross 1 to be connected with the last flange cover of oil gas pipeline, quench oil filling tube 3 passes quench oil sleeve pipe 2 downwards, and is connected through quench oil pipeline flange 6 with 2 upper ends of quench oil sleeve pipe, and quench oil filling tube 3 bottoms is equipped with nozzle 4, and nozzle 4 bottommost is located oil gas pipeline cross 1's branch pipe top.
The quenching oil in the utility model adopts the types common to coking units, including diesel oil, wax oil and reclaimed sump oil. The control scheme is that the temperature of the cooled oil gas is controlled by the quenching oil flow, and the temperature of the oil gas is reduced to 415 ℃.
The atomized quenching oil is sprayed at the joint of the four-way (or three-way) of the oil-gas pipeline, so that the quenching oil and the rising oil gas are in reverse contact and mixed, a better cooling effect is expected, the temperature of the oil gas is rapidly reduced to 415 ℃, the coking reaction is stopped, and the coking of the oil-gas pipeline is prevented. In addition, experimental data and industrial practical application prove that the single-stage anti-coking facility can completely meet the process requirements without adopting a two-stage injection mode. The utility model has the characteristics of good anti-coking effect, simple structure, easy implementation and strong reliability, and avoids the falling of the nozzle caused by high-speed impact.
The apparatus of the present invention has a removable structure that allows for on-line decoking of oil and gas lines and quench oil injection lines, if necessary. After the treatment tower is fully cooled, an operator can disassemble the oil-gas pipeline flange 6 of the non-productive coke tower (the flange is small in size and easy to disassemble and install), and the quenching oil injection pipe 3 and the nozzle 4 are extracted to perform decoking. The operator can dismantle oil gas pipeline upper flange 5, carries out the decoking to the oil gas line. Because the coke tower is operated intermittently, the production tower can continuously coke during coke cleaning, and therefore, the production of the whole device cannot be influenced.
In addition, the utility model can delay the coking speed in the oil-gas pipeline, reduce the decoking frequency of the pipeline and realize that decoking is not needed in one start-up period. The anti-coking function of the utility model reduces the pressure drop of the oil-gas pipeline, the operating pressure of the coke tower can be correspondingly reduced, the yield of the liquid product of the coking device can be improved, and the economic benefit is increased.
Examples
The coking raw material is vacuum residue oil, the treatment capacity is 160 ten thousand tons per year, the circulation ratio is 0.3, the outlet temperature of the heating furnace is 495-500 ℃, the operating pressure of the coke tower is 0.1-0.25 MPa (g), and the temperature of oil gas at the top of the coke tower is 440-460 ℃. The quenching oil is wax oil, and the injection amount is about 15-25 t/h.
Quenching oil is injected by adopting the coke tower top oil-gas pipeline anti-coking device shown in the figure 1. The temperature of oil gas is rapidly reduced to 415 ℃, the coking speed of an oil gas pipeline can be effectively delayed, and decoking is not needed in a production period (usually three years). The pressure drop of the oil-gas pipeline is reduced, the operating pressure of the coke tower is correspondingly reduced by 0.03MPa, and the yield of the liquid product of the device is increased by about 0.3 percent.
Claims (6)
1. The utility model provides a coke tower top oil gas pipeline anti-coking device which characterized in that: the coke tower top oil and gas pipeline anti-coking device comprises an oil and gas pipeline cross joint, a quenching oil sleeve, a quenching oil injection pipe and a nozzle, wherein the oil and gas pipeline cross joint is positioned on an outlet pipeline of a coke tower seal head and comprises a main pipe and a branch pipe, the main pipe of the oil and gas pipeline cross joint is vertically arranged, the main pipe of the oil and gas pipeline cross joint is provided with an upper flange of the oil and gas pipeline and a lower flange of the oil and gas pipeline, one branch pipe of the oil and gas pipeline cross joint is a horizontal oil and gas pipeline, the upper flange of the oil and gas pipeline is provided with a side flange of the oil and gas pipeline, the other branch pipe of the oil and gas pipeline cross joint is a coke cleaning port, the main pipe of the oil and gas pipeline cross joint is communicated with the outlet pipeline of the coke tower through the lower flange of the oil and gas pipeline and communicated with the horizontal oil and gas pipeline through the side flange of the oil and gas pipeline, the flange of the upper flange of the oil and gas pipeline is provided with an opening, the quenching oil and gas pipeline sleeve penetrates through the opening on the upper flange cover of the oil and the main pipe of the oil and gas pipeline cross joint, and is connected with flange cover on the oil gas pipeline, and quench oil filling tube passes quench oil sleeve pipe downwards to be connected through the flange with quench oil sleeve pipe upper end, quench oil filling tube bottom is equipped with the nozzle, and the nozzle bottommost is located the branch pipe top of oil gas pipeline cross.
2. The coke tower top oil and gas pipeline anti-coking device of claim 1, which is characterized in that: the quenching oil sleeve is connected with an upper flange cover of an oil-gas pipeline through welding.
3. The coke tower top oil-gas pipeline anti-coking device of claim 1, which is characterized in that: the spray angle of the nozzle is 30-120 degrees.
4. The utility model provides a coke tower top oil gas pipeline anti-coking device which characterized in that: the coke tower top oil and gas pipeline anti-coking device comprises an oil and gas pipeline tee joint, a quenching oil sleeve, a quenching oil injection pipe and a nozzle, wherein the oil and gas pipeline tee joint is positioned on an outlet pipeline of a coke tower seal head and comprises a main pipe and a branch pipe, the main pipe of the oil and gas pipeline tee joint is vertically arranged, an upper flange of the oil and gas pipeline and a lower flange of the oil and gas pipeline are arranged on the main pipe of the oil and gas pipeline tee joint, the branch pipe of the oil and gas pipeline tee joint is a horizontal oil and gas pipeline, an oil and gas pipeline side flange is arranged on the branch pipe of the oil and gas pipeline, the main pipe of the oil and gas pipeline tee joint is communicated with the outlet pipeline of the coke tower through the lower flange of the oil and gas pipeline and is communicated with the horizontal oil and gas pipeline through the oil and gas pipeline side flange, an opening is arranged on a flange cover of the oil and gas pipeline, the quenching oil sleeve penetrates through the opening on the flange cover of the oil and gas pipeline tee joint downwards, and is connected with the upper end of the quenching oil sleeve through a flange, the bottom of the quenching oil injection pipe is provided with a nozzle, and the bottommost end of the nozzle is positioned above a branch pipe of the oil-gas pipeline tee.
5. The coke tower top oil and gas pipeline anti-coking device of claim 4, which is characterized in that: the quenching oil sleeve is connected with an upper flange cover of an oil-gas pipeline through welding.
6. The coke tower top oil and gas pipeline anti-coking device of claim 4, which is characterized in that: the spray angle of the nozzle is 30-120 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122690906.9U CN216688024U (en) | 2021-11-05 | 2021-11-05 | Coking device is prevented to coke tower top oil gas pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122690906.9U CN216688024U (en) | 2021-11-05 | 2021-11-05 | Coking device is prevented to coke tower top oil gas pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216688024U true CN216688024U (en) | 2022-06-07 |
Family
ID=81832339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122690906.9U Active CN216688024U (en) | 2021-11-05 | 2021-11-05 | Coking device is prevented to coke tower top oil gas pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216688024U (en) |
-
2021
- 2021-11-05 CN CN202122690906.9U patent/CN216688024U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2006243855B2 (en) | Method and system for producing synthesis gas | |
| CN100362081C (en) | Industrial producing process for coal series needle coke | |
| CN102295943A (en) | Method for coking needle coke by large recycle ratio oil system | |
| WO2006012800A1 (en) | An apparatus for preparing oil from waste plastics in continuous and industrial production | |
| CN216688024U (en) | Coking device is prevented to coke tower top oil gas pipeline | |
| CN114276831B (en) | Anti-coking device for oil-gas line on top of coke tower | |
| CN112048330B (en) | Process and device for reducing coke powder of delayed coking fractionating tower | |
| CN106753569A (en) | Low pressure dry powder coal gasifying process | |
| CN202297497U (en) | Oil-gas line anti-coking device at top of coking tower | |
| CN113999703A (en) | System and process for efficiently eluting benzene hydrocarbon in coke oven gas | |
| CN106118707A (en) | Waste plastics innocent treatment equipment and method | |
| CN101343553A (en) | Apparatus and method for preventing coking drum oil gas vent from coking | |
| CN208346102U (en) | The pretreatment of raw material solvent extraction system of needle coke industrialized production | |
| WO2021128902A1 (en) | Oil product mixing device in needle coke production process, and process thereof | |
| CN112999815B (en) | Device and method for heat exchange washing of oil gas | |
| CN207002641U (en) | A kind of oil gas cooling of delayed coking emptying tower and aqueous heavy dirty oil freshening system | |
| CN105713630A (en) | Coal carbonization, oil-gas washing separation and delayed coking combined technology and device | |
| CN102899079B (en) | Delayed coking method | |
| CN110903863B (en) | Primary cooling process and device adopting circulating ammonia water for refrigeration | |
| CN210711414U (en) | Quenching oil device for coke tower top reaction oil-gas pipeline | |
| CN212090967U (en) | High boiling point heat-sensitive material distillation recovery system | |
| CN211595548U (en) | Primary cooling device adopting circulating ammonia water for refrigeration | |
| CN207738713U (en) | A kind of primary cooler flusher with backwashing function | |
| CN100386127C (en) | Decompression tower bottom coke inhibiting device and its uses | |
| CN205420275U (en) | Automatic water jet equipment of steam quenching in blue charcoal production |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |