CN107433273B - Harmless treatment method for waste crude oil pipeline - Google Patents
Harmless treatment method for waste crude oil pipeline Download PDFInfo
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- CN107433273B CN107433273B CN201710671273.2A CN201710671273A CN107433273B CN 107433273 B CN107433273 B CN 107433273B CN 201710671273 A CN201710671273 A CN 201710671273A CN 107433273 B CN107433273 B CN 107433273B
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- 239000010779 crude oil Substances 0.000 title claims abstract description 78
- 239000002699 waste material Substances 0.000 title claims abstract description 70
- 238000000034 method Methods 0.000 title claims abstract description 39
- 239000003921 oil Substances 0.000 claims abstract description 47
- 239000002002 slurry Substances 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000012459 cleaning agent Substances 0.000 claims abstract description 11
- 239000001993 wax Substances 0.000 claims description 29
- 239000007788 liquid Substances 0.000 claims description 16
- 239000012188 paraffin wax Substances 0.000 claims description 5
- 238000003860 storage Methods 0.000 claims description 5
- 241000282887 Suidae Species 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 238000003672 processing method Methods 0.000 abstract 1
- 238000004140 cleaning Methods 0.000 description 39
- 238000002347 injection Methods 0.000 description 20
- 239000007924 injection Substances 0.000 description 20
- 239000007789 gas Substances 0.000 description 18
- 239000000463 material Substances 0.000 description 8
- 238000007711 solidification Methods 0.000 description 7
- 230000008023 solidification Effects 0.000 description 7
- 239000000126 substance Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000010865 sewage Substances 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000003570 air Substances 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052925 anhydrite Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 235000014121 butter Nutrition 0.000 description 1
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000013530 defoamer Substances 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000011086 high cleaning Methods 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
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- 238000004064 recycling Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
- B08B9/053—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Cleaning In General (AREA)
Abstract
The invention relates to a harmless treatment method for a waste crude oil pipeline. The processing method comprises the following steps: 1) implanting an oil removal ball group into the waste crude oil pipeline, wherein the oil removal ball group comprises at least two oil removal pipe cleaners which are arranged at intervals along the length direction of the pipeline, filling water between every two adjacent oil removal pipe cleaners, then injecting air into the waste crude oil pipeline to push the oil removal ball group to move forwards along the pipeline, and removing the residual crude oil in the pipeline; 2) the method comprises the steps of implanting a wax removal ball group into a waste crude oil pipeline, wherein the wax removal ball group comprises at least two wax removal pipe cleaners which are arranged at intervals along the length direction of the pipeline, filling a cleaning agent between every two adjacent wax removal pipe cleaners, and then injecting air into the waste crude oil pipeline to push the wax removal ball group to move forwards along the pipeline so as to remove wax and residual crude oil attached in the pipeline; 3) and (3) injecting the curable slurry into the waste crude oil pipeline, and curing to fill the waste pipeline. The treatment method has the advantages of low energy consumption, strong operability and good safety, and meets the requirements of safe and harmless disposal of the waste pipelines.
Description
Technical Field
The invention belongs to the field of harmless treatment of waste crude oil pipelines, and particularly relates to a harmless treatment method of a waste crude oil pipeline.
Background
Pipeline transportation is the most important transportation mode of petroleum, and in recent years, with the continuous increase of human demand for petroleum, petroleum transportation pipelines in China have made breakthrough development, but waste pipelines also increase year by year. The pipeline reaches the service life, or the pipeline does not have the value of conveying the petroleum and natural gas due to corrosion defect evaluation judgment, or the pipeline is required to be built due to planning and adjustment, or the pipeline is discarded when the operation risk of the safe distance of the pipeline exceeds an acceptable range. At present, the pipeline overdimension and abandonment in China become common problems, and the harmless treatment of domestic abandoned pipelines has no relevant standards and specifications.
The waste pipeline is treated by adopting the schemes of water injection, corrosion inhibitor injection, nitrogen injection and pipe sealing, etc., which can temporarily ensure the safety of the stopped pipeline, but have the hidden troubles of the later safety of the residual materials in the pipeline and secondary environmental pollution. If the traditional excavation pipe-taking disposal scheme is adopted, although hidden dangers can be thoroughly eliminated, objective reality of overlarge ground facilities and attachment removal amount, extremely complex underground concealed object treatment and the like exists, and the method is generally difficult to thoroughly implement.
The application publication No. CN104307819A discloses a combined cleaning method for residues in a waste oil-gas pipeline, which is characterized in that a pigging train is implanted into the waste oil-gas pipeline, and the pigging train at least comprises a bidirectional straight-plate pipe cleaner, a foam pipe cleaner, an organic solvent, a water-based cleaning agent and other pipe cleaners and cleaning agents of different types; and introducing a pushing medium into the waste oil and gas pipeline to push the pigging train to run in the waste oil and gas pipeline so as to clean the waste oil and gas pipeline. The cleaning method has the problems of high energy consumption and poor cleaning efficiency in actual cleaning operation.
Disclosure of Invention
The invention aims to provide a harmless treatment method for a waste crude oil pipeline, so as to solve the problems of high energy consumption and poor cleaning efficiency of the existing cleaning method.
In order to realize the purpose, the technical scheme of the harmless treatment method of the waste crude oil pipeline is as follows:
a harmless treatment method for a waste crude oil pipeline comprises the following steps:
1) implanting an oil removal ball group into the waste crude oil pipeline, wherein the oil removal ball group comprises at least two oil removal pipe cleaners which are arranged at intervals along the length direction of the pipeline, filling water between every two adjacent oil removal pipe cleaners, then injecting air into the waste crude oil pipeline to push the oil removal ball group to move forwards along the pipeline, and removing the residual crude oil in the pipeline;
2) the method comprises the steps of implanting a wax removal ball group into a waste crude oil pipeline, wherein the wax removal ball group comprises at least two wax removal pipe cleaners which are arranged at intervals along the length direction of the pipeline, filling a cleaning agent between every two adjacent wax removal pipe cleaners, and then injecting air into the waste crude oil pipeline to push the wax removal ball group to move forwards along the pipeline so as to remove wax and residual crude oil attached in the pipeline;
3) and (3) injecting the curable slurry into the waste crude oil pipeline, and curing and filling the waste crude oil pipeline.
According to the harmless treatment method for the waste crude oil pipeline, the residual substances in the waste crude oil pipeline are cleaned according to classification, so that the cleaning pertinence and the cleaning efficiency are improved; cleaning media are arranged between the pipe cleaners, so that the effects of buffering protection and auxiliary cleaning can be achieved, the construction operability is improved, and the cleaning efficiency is further improved; the method can use compressed air as a pushing medium, and has low energy consumption and good safety; after grouting and curing, the waste crude oil pipeline is full of water and the medium is harmless, so that the requirement on safe disposal of the waste pipeline can be met, and secondary pollution to the environment is avoided.
In the steps 1) and 2), spacing supporting pieces are arranged between adjacent oil removing pipe cleaners and between adjacent paraffin removing pipe cleaners, so that liquid storage gaps are formed between the adjacent oil removing pipe cleaners and between the adjacent paraffin removing pipe cleaners. Preferably, the spacer jack comprises a rigid section connected to one of the cleaning pigs and a flexible section connecting the rigid section to the other cleaning pig.
During pipeline cleaning, pressure changes among the pig ball groups can be caused due to pipeline wall thickness changes, line fluctuation, medium accumulation and the like, and the front ball and the rear ball are sometimes close to each other and sometimes suddenly far away from each other. The flexible section can prevent to throw off each other suddenly because of adjacent dredging pipe ware to lead to impurity such as outside water, oil, air to get into cleaning medium and hold the chamber, influence cleaning medium's cleaning performance.
In the step 1), before the deoiling ball group is implanted, the waste crude oil pipeline is plugged and cut, and then a ball serving device and a ball collecting device for implanting and recovering the cleaning ball group are installed.
In the step 2), the leather cup interval and hardness can be designed according to the thickness of the attached wax.
In the step 1), an oil removing ball group is implanted at a high point along the direction of the pipeline and recovered at a low point. In the step 2), wax removing ball groups are implanted at high points along the direction of the pipeline and recovered at low points. And 3) injecting the curable slurry from a low point to a high point along the direction of the pipeline.
Compared with the traditional steam blowing, nitrogen blowing and water replacement processes, the harmless treatment method for the waste crude oil pipeline can thoroughly remove residual oil and attached wax, avoid secondary pollution and has high cleaning efficiency; compared with the traditional process for cutting pipes by soil-breaking excavation, land acquisition coordination is not needed, the original road and terrace traversing is not needed to be damaged, the ground structure is not needed to be removed, and the workload of earthwork excavation and removal is relatively less.
According to the harmless treatment method for the waste crude oil pipeline, the waste pipeline is cleaned in a mode that the cleaning ball group is matched with the cleaning medium, so that the cleaning efficiency is high; the cleaning process can be realized by using air as a pushing medium, and the cleaning device has the advantages of low energy consumption, high safety and good operability.
Drawings
FIG. 1 is a schematic view of oil/wax removal in a method for harmless treatment of a waste crude oil pipeline according to the present invention;
FIG. 2 is a flow diagram of a method for the innocent treatment of a waste crude oil pipeline according to the present invention;
fig. 3 is a schematic view of a grouting curing operation.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
The specific embodiment of the harmless treatment method of the waste crude oil pipeline of the invention is shown in a process flow chart of fig. 2, and the treatment system adopting the embodiment comprises the following steps:
1) implanting an oil removing ball group into the waste crude oil pipeline, wherein the oil removing ball group comprises two plate type three-leather-cup pipe cleaners arranged along the length direction of the pipeline, and a gap for injecting water is formed between every two adjacent pipe cleaners for oil removal; injecting air into the waste crude oil pipeline to push the oil removing ball group to move forwards along the pipeline, and removing the residual crude oil in the pipeline;
2) the method comprises the following steps of implanting a wax removal ball group into a waste crude oil pipeline, wherein the wax removal ball group comprises at least two wax removal pipe cleaners arranged along the length direction of the pipeline, and a gap for injecting a cleaning agent is formed between every two adjacent wax removal pipe cleaners; injecting air into the waste crude oil pipeline to push the paraffin removal and oil removal ball group to move forward along the pipeline, and removing the adhered wax and residual crude oil in the pipeline;
3) and (3) injecting the curable slurry into the waste crude oil pipeline, and curing and filling the waste crude oil pipeline.
In step 1) and step 2), referring to fig. 1, a schematic diagram of degreasing/dewaxing a waste crude oil pipeline includes a to-be-discarded crude oil pipeline 8, a ball serving device 1 arranged at one end of the to-be-discarded crude oil pipeline 8 and used for implanting a cleaning ball group into the waste pipeline, and a ball receiving device 10 arranged at the other end of the to-be-discarded crude oil pipeline 8 and used for receiving the cleaning ball group, wherein the cleaning ball group includes two front pipe cleaners 7 and two rear pipe cleaners 6 arranged along the length direction of the pipeline, a gap 14 used for injecting a cleaning medium is arranged between the front pipe cleaners 7 and the rear pipe cleaners 6, a spacing support top part is connected between the front pipe cleaners 7 and the rear pipe cleaners 6, the spacing support top part includes a rigid part 150 connected with the front pipe cleaners and a flexible connecting part 151 connected with the rigid part 150 and the rear pipe cleaners 6, and a spacing support top part 15 is used for preventing the front pipe cleaners caused by uneven pipe diameter and the like when the, The back pipe cleaners are mutually jointed, so that the front pipe cleaner and the back pipe cleaner are ensured to have the minimum interval within the length range of the rigid part, the leakage of the cleaning medium in the gap 14 is reduced, and the cleaning efficiency is improved; the arrangement of the soft connecting piece can prevent the adjacent pipe cleaners from being separated suddenly, so that impurities such as water, oil and air outside enter the cleaning medium accommodating cavity to influence the cleaning effect of the cleaning medium.
The abandoned crude oil pipeline is provided with a pressurized open pore plugging structure 9; the ball serving device 1 is provided with a gas injection port, the gas injection port is connected with an air compressor 3 through a gas injection pipe 2, and the gas injection port is used for injecting air to push the cleaning ball group to move forward along a pipeline; the ball serving device 1 is also provided with a liquid injection port which is connected with a liquid injection pump 5 through a liquid injection pipe 4 and is used for injecting cleaning media into the gap; the ball collecting device is provided with an exhaust pipe 11 for exhausting gas and a drain outlet for discharging waste pipeline residues, and the drain outlet is connected with a crude oil/sewage storage device 13 through an oil/sewage discharge pipeline 12. The ball serving device and the ball collecting device are tubular bodies matched with the waste crude oil pipeline, one end of each ball serving device is welded with the waste crude oil pipeline 8, and the other end of each ball serving device is provided with a sealing cover for sealing when the pipeline is cleaned.
When the device is used for recycling waste and remained crude oil, a plate type three-leather-cup pipe cleaner is adopted as the pipe cleaner, and a cleaning medium is water; when the pipeline cleaner works, the valve on the liquid injection pipe is opened, the pressed open hole blocking structure is unblocked, the liquid injection pump is started to inject water into the gap, the front pipeline cleaner is pushed to move forward to a distance of about 5m, and the liquid injection pump and the valve on the liquid injection pipe are closed; opening a valve on the gas injection pipe and a valve of the oil discharge pipeline, starting an air compressor, starting to inject air into the pipeline, pushing a rear pipe cleaner, water, a front pipe cleaner and crude oil to move forwards together, discharging the crude oil into a crude oil storage device (an oil tank truck) through the oil discharge pipeline, and conveying the crude oil and oily sewage to a designated pump station for treatment and utilization; when preceding pig, back pig all reach in receiving the ball device, close air compressor, open the discharge valve on the blast pipe, decompress to atmospheric pressure, the tank wagon no longer has oil to get into the back, closes the valve of oil drain pipe way, and the crude oil recovery operation is accomplished.
After the crude oil recovery operation is finished, the processing system of the embodiment can be further utilized to carry out wax removal operation on the waste crude oil pipeline, the wax removal operation adopts a pipeline cleaner for wax removal, and the cleaning medium is a chemical cleaning agent which has strong dissolvability for attaching wax to the pipeline wall and residual crude oil; during the wax removal operation, the liquid injection pump is started, a chemical cleaning agent is injected between the two pipe cleaners, the front pipe cleaner is pushed to move forward to a distance of about 5m, and valves on the liquid injection pump and the liquid injection pipe are closed; and opening a valve on the air inlet pipe, starting the air compressor, injecting air into the pipeline, and pushing the rear pipe cleaner, the chemical cleaning agent and the front pipe cleaner to move forwards together. So relapse, change the dredging pipe ware, chemical cleaning agent, remaining crude oil and pipe wall attach the wax and scrape out the washing completely in the geminate transistors, do not have obvious greasy dirt in discharging liquid until, and combustible gas detector detects oil gas concentration and is less than 0.5% LEL, the cleaning operation finishes, close air compressor, open discharge valve on the blast pipe, the exhaust of letting out, with pipeline internal pressure decompression to atmospheric pressure, open sewage pipes's valve, arrange to filth storage device (collection oil drum) to remaining a small amount of liquid and collect, greasy dirt mixture transports to the cleaning agent producer and carries out centralized processing.
In the above treatment method, the step 2) can be repeated for a plurality of times until no obvious oil stain exists in the discharged liquid, and the oil gas concentration detected by the combustible gas detector is less than 0.5% LEL.
In the step 3), the schematic diagram of the grouting solidification operation is shown in fig. 3, and the grouting solidification operation includes a waste crude oil pipeline 8, a left end socket 160 and a right end socket 161 which are arranged at two ends of the waste crude oil pipeline 8, a grouting pipe 170 is arranged at the head end of the waste crude oil pipeline 8, the grouting pipe 170 is connected with a grouting pipe orifice of the pump truck through a clamp 18, an observation port 171 is arranged at the tail end of the waste crude oil pipeline 8, and a butter wall 19 for isolating gas flowing out of the pipeline is arranged in the waste crude oil pipeline.
During grouting solidification, the longest distance of a grouting solidification pipeline depends on the factors such as the particle size of slurry, the fluidity of the slurry, the pipe diameter size, the height difference of the pipeline and the like, generally the longest distance does not exceed 2km, and the longest grouting pipe diameter does not exceed 600 mm. Before the grouting device is installed, two ends of the waste pipeline are drilled with yellow oil walls, and outflow gas possibly generated in the partition pipe is generated; welding an elliptical seal head at the end part of the pipe; and a DN150 grouting port is arranged at a position 600mm away from the pipe end at the low point end, and the grouting pipeline is connected with the grouting pipe orifice of the pump truck by adopting a special hoop-shaped device, so that the height is convenient to operate. A DN150 viewing port is arranged at the position 1000mm away from the tube end at the high point end.
The mass ratio of each component of the injected slurry is as follows: limestone (5%), anhydrite (2%), alumina (1%), cement (34%), fly ash (34%) and water (23%), and appropriate amounts of set control agent, dispersant and defoamer (1%) were added. Before slurry is injected, the fluidity of the slurry is tested, the slurry proportion is different according to the conditions such as air temperature, and the injected slurry has super-fluidity, so that smooth flowing can be realized.
The fluidity of the injected slurry is tested by a truncated cone fluidity test and is required to be more than 420 mm; the slurry is full, does not separate, does not sink and does not bleed; the 24-hour expansion rate can reach 7%, and a gap zone cannot be formed; the strength of the slurry reaches more than 20MPa in 28 days.
And (4) uniformly stirring the grouting material in a concrete mixing plant, transporting the grouting material to a construction site by using a tank truck, and finishing grouting the grouting material within 6 hours. After the grouting material is unloaded into the hopper from the tank truck, the concrete pump truck pump is used as power to implement grouting, the grouting pressure is controlled not to exceed the working pressure of the pipeline, and the grouting treatment is stopped immediately when the pressure rises sharply or the grouting pipe shakes violently in the process. When the slurry reaches the tail end of the pipeline, the slurry stably flows out from the high-point gas outlet (the discharged slurry, oil stain and the like can be led to a tank truck or a special slurry receiving barrel to avoid causing environmental pollution), the slurry pumping is stopped, and the grouting operation is finished.
The injected slurry has low energy consumption, good fluidity, proper solidification time and small shrinkage after solidification; the conventional self-prepared grouting pump and on-site self-mixing material of the grouting method are changed into a commercial mixing station to provide mixing material, the cement pump truck of the commercial mixing station is directly adopted for injection, and an injection interface device is designed automatically, so that the grouting method is strong in operability, high in efficiency, low in cost and more practical.
After the grouting operation is finished, the slurry is solidified after two weeks, a small amount of retraction can occur at the end part of the pipeline, and a skylight is formed at the top of the solidified pipeline at the discharge end for filling degree inspection to verify the grouting solidification effect. And (4) manually filling plain soil at the end part of the pipeline because the slurry is solidified and the retracted part is welded and sealed.
In other embodiments, the number of pigs may be set to more than three; the length of the interval supporting and ejecting piece can be flexibly designed according to the bending radius of the pipeline (or the fluctuation condition of the pipeline), and the length of the cleaning liquid is increased to reduce the cleaning times. The spacing supporting and jacking piece can be a rigid structural rod piece with two ends respectively connected with steel wire ropes, and the two steel wire ropes are respectively connected with corresponding pipe cleaners; the spacing support top piece can be not connected with the pipe cleaner, comprises a positioning disc and a rigid rod penetrating through the positioning disc, or adopts other forms, and can prevent adjacent pipe cleaners from contacting; the type and material of the pig may be selected as desired.
The harmless treatment method for the waste crude oil pipeline has the advantages of scientific and reasonable process method, low construction difficulty, low safety risk, low cost, high cost performance, wide market application prospect and great popularization significance.
Claims (5)
1. A harmless treatment method for a waste crude oil pipeline is characterized by comprising the following steps:
1) implanting an oil removal ball group into the waste crude oil pipeline, wherein the oil removal ball group comprises at least two oil removal pipe cleaners which are arranged at intervals along the length direction of the pipeline, filling water between every two adjacent oil removal pipe cleaners, then injecting air into the waste crude oil pipeline to push the oil removal ball group to move forwards along the pipeline, and removing the residual crude oil in the pipeline;
2) the method comprises the steps of implanting a wax removal ball group into a waste crude oil pipeline, wherein the wax removal ball group comprises at least two wax removal pipe cleaners which are arranged at intervals along the length direction of the pipeline, filling a cleaning agent between every two adjacent wax removal pipe cleaners, and then injecting air into the waste crude oil pipeline to push the wax removal ball group to move forwards along the pipeline so as to remove wax and residual crude oil attached in the pipeline;
3) injecting the curable slurry into the waste crude oil pipeline, and curing and filling the waste crude oil pipeline;
in the steps 1) and 2), spacing support top pieces are arranged between adjacent oil removing pipe cleaners and between adjacent paraffin removing pipe cleaners so as to ensure that liquid storage gaps are formed between the adjacent oil removing pipe cleaners and between the adjacent paraffin removing pipe cleaners;
the spacer jack includes a rigid section connected to one of the pigs and a flexible section connecting the rigid section to the other pig.
2. The method for harmless treatment of waste crude oil pipeline as claimed in claim 1, wherein in step 1), the oil removing ball group is implanted at high point along the pipeline and recovered at low point.
3. The method for innocent treatment of the abandoned crude oil pipeline as claimed in claim 1, wherein in the step 2), the wax removing ball group is implanted at a high point along the pipeline and recovered at a low point.
4. The method for detoxifying waste crude oil pipeline as claimed in claim 1, wherein in step 3), the curable slurry is injected from a low point to a high point along the pipeline.
5. The method for innocent treatment of the waste crude oil pipeline as set forth in claim 1, wherein in the step 1), the waste crude oil pipeline is plugged and cut before the oil removing ball group is implanted, and then a ball serving device and a ball collecting device for implanting and recovering the oil removing ball group and the wax removing ball group are installed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710671273.2A CN107433273B (en) | 2017-08-08 | 2017-08-08 | Harmless treatment method for waste crude oil pipeline |
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| CN201710671273.2A CN107433273B (en) | 2017-08-08 | 2017-08-08 | Harmless treatment method for waste crude oil pipeline |
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| CN107433273A CN107433273A (en) | 2017-12-05 |
| CN107433273B true CN107433273B (en) | 2020-06-12 |
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| CN109201696B (en) * | 2018-09-30 | 2021-09-14 | 天津市瑞德赛恩水业有限公司 | Method for plugging waste crude oil pipeline |
| CN111156408A (en) * | 2018-11-08 | 2020-05-15 | 中国石油化工股份有限公司 | System for storing liquid and removing residual liquid |
| CN109985868A (en) * | 2019-04-26 | 2019-07-09 | 马付林 | Oil pipeline inner wall cleaning oil pollution method |
| CN110560467B (en) * | 2019-10-12 | 2022-07-29 | 中石化第十建设有限公司 | Harmless treatment method for waste and old pipelines |
| CN110687258A (en) * | 2019-11-08 | 2020-01-14 | 中石化第十建设有限公司 | Method for detecting cleaning cleanliness of crude oil pipeline |
| CN115254832A (en) * | 2022-06-30 | 2022-11-01 | 西安热工研究院有限公司 | Pipeline descaling device and pipeline descaling method |
| CN116967216B (en) * | 2023-09-25 | 2023-12-19 | 福建省德尚电子材料有限公司 | Photoresist pipeline system |
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