CN104307822A - Pollution-free, high-efficiency and long-distance pipe installing and cleaning method - Google Patents
Pollution-free, high-efficiency and long-distance pipe installing and cleaning method Download PDFInfo
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- CN104307822A CN104307822A CN201410409689.3A CN201410409689A CN104307822A CN 104307822 A CN104307822 A CN 104307822A CN 201410409689 A CN201410409689 A CN 201410409689A CN 104307822 A CN104307822 A CN 104307822A
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- wiper
- ball
- pipeline
- pipe
- cleaned
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Classifications
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- 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
- B08B9/057—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 the cleaning devices being entrained discrete elements, e.g. balls, grinding elements, brushes
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- 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
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
- C11D1/66—Non-ionic compounds
- C11D1/83—Mixtures of non-ionic with anionic compounds
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/0005—Other compounding ingredients characterised by their effect
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/26—Organic compounds containing nitrogen
- C11D3/33—Amino carboxylic acids
Abstract
The invention discloses a pollution-free, high-efficiency and long-distance pipe installing and cleaning method, and belongs to the field of pipe cleaning. The pollution-free, high-efficiency and long-distance pipe installing and cleaning method comprises the following steps: installing a ball sending device and a ball receiving device, temporarily testing the leakage and the pressure of a system, sending a diameter-measuring ball, drying, derusting, passivating, chemically degreasing, drying, inspecting and accepting, performing nitrogen protection and transferring, wherein in the derusting, passivating and chemically degreasing steps, a pipe-cleaning train of a pipe cleaner-a chemical agent-a pipe cleaner is used, namely the chemical agent is integrally injected into a space between a first pipe cleaner and a second pipe cleaner; the chemical agent comprises a passivating agent or a degreasing agent; the degreasing agent adopts the formulation as follows: 2-3.5% of sodium tripolyphosphate, 1-2% of sodium carbonate, 0.5-1.5% of sodium hydroxide, 0.2-0.4% of sodium borate, 0.1-0.2% of disodium ethylenediamine tetraacetate, 0.05-0.1% of sodium oleate, 0.05-0.1% of sodium dodecyl sulfate, 0.05-0.1% of alkylphenol ethoxylate and 92.1-96.05% of water. By the pollution-free, high-efficiency and long-distance pipe installing and cleaning method, synchronous and high-efficiency operation of physical cleaning and chemical cleaning of a long-distance pipe can be achieved.
Description
Technical field
The present invention relates to pipeline cleaning technical field, more particularly, the pollution-free high-efficient long-distance pipe relating to a kind of wiper-synchronous passivation and degreasing construction installs cleaning method.
Background technology
Pipeline raw material steel pipe, steel plate, stainless steel etc. in rolling time can be formed and roll skin; Pipeline can form iron rust, welding slag and be the anticorrosion oily antirust agent be coated on pipeline in manufacture, accumulating and installation process, the impurity such as dust, sand, cement, insulation material.Above-mentioned rolls the normal use that the various impurity such as skin, iron rust, welding slag, antirust agent and silt have a strong impact on pipeline, therefore needs to clean pipeline, makes to recover material surface itself in pipeline.
The method of existing pipeline cleaning mainly contains three kinds: 1, Chemical cleaning, Chemical cleaning pipeline adopts chemical agent, interim transformation is carried out to pipeline, carries out cyclic chemical cleaning with temporary pipeline and water circulating pump station from two of pipeline, will for different equipment choice cleaning agents before cleaning; Mainly contain the number of chemical pipeline cleanings such as the Chemical cleaning of oilfield flooding pipeline network, the cleaning of rectifying column coke removal, the front cleaning of long-distance transport pipes oil to gas Chemical cleaning, industrial pipeline use, it is strong that this technology has flexibility, to pipe shape no requirement (NR), speed is fast, clean the features such as thorough, but also possess following shortcoming: need a large amount of chemical cleaning solutions, and a large amount of cleaning fluids certainly will will cause a large amount of wastes and environmental pollution.2, high pressure water cleaning, adopts the high-pressure water jet of more than 50Mpa, carries out high-pressure water jet peel off cleaning to inner surface of pipeline dirt; It is fast that this technology has speed, the features such as cost is low, but be mainly used in short distance pipeline, and pipe diameter must be greater than more than 50cm.3, PIG pigging: PIG pipeline cleaning system is primarily of PIG, PIG transmitter, PIG receiver, relevant detection system, power source and promote medium composition, PIG industry pigging technology is that the motive force relying on pump propelling fluid to produce drives PIG (wiper) driven forward in pipe, the scraping facility of PIG and wearing thereof will be piled up outside the dirt discharge pipe of in-line, thus reaches the object of cleaning; This technology is widely used in the cleaning work such as all kinds of process pipe, oil field oil transportation gas pipeline, particularly for the pipeline cleaning of long distance delivery fluid, has the irreplaceable advantage of other technologies.
Domestic and international oil at present, chemical industry, natural gas, special in air in the engineerings such as water supply conveyance system, oxygen, nitrogen, it is quite high for the purity requirements of the inner-walls of duct of hydrogen and various gas, every profession and trade, company standard all has special special description to this, therefore, ensure that after installing, the cleanliness factor of inner wall of long-distance pipe is most important, traditional construction method adopts above-mentioned chemical cleaning method or PIG pigging method to be used alone, in view of traditional chemical method needs a large amount of chemical cleaning solutions, and cause a large amount of wastes and environmental pollution gradually replace by PIG pigging method.
Existing a large amount of method utilizing PIG wiper pigging in prior art, as being published in " practical technique " the 13rd " Pig pigging technology and application thereof " of volume the 1st phase in February, 1997, author Niu Zhongyou; And for example within 2003, be published in " the cleaning world " the 19th " application on oil to gas pipeline of PIG cleaning technique " of volume o. 11th, author Wang Zhongtai, Liu Wenshan, Zhou Tianping, Zhang Henglu; And for example be published in " the cleaning world " the 21st " PIG cleaning technique be in the ducted application study of reactor decommissioning " of volume the 1st phase in January, 2005, author Wang Donghai is all the methods being used alone PIG pigging.
In project under construction for partial oxidation, nitrogen long distance delivery pipeline, relate to the inflammable and explosive media such as oxygen, according to national industry standard " degreasing engineering construction and acceptance specification " HG 20202-2000 requirement, must degreasing operation be carried out; Simultaneously according to national industry standard " long oil and gas pipeline engineering construction and acceptance specification " GB50369-2006 relevant regulations, these long-distance transport pipes, after pressure testing terminates, need carry out the construction of wiper pigging.Because the method for chemical degreasing is efficiently simple in degreasing operation, so need the method using chemical degreasing and physics wiper pigging in the pigging project of above-mentioned particular/special requirement simultaneously, be published in " PIG mechanical cleaning and the application study of chemical cleaning technique in water injection pipeline cleans " of " Petroleum Engineering Construction " the 3rd phase in 1997, author Zhang Jincheng, Zhang Xianjun, Liu Suping, it is the three-step approach adopting PIG mechanical cleaning one chemical tendering liquid to clean a PIG mechanical cleaning in this paper, first at test pipe two ends, transmitter and receiver are housed respectively, PIG mechanical cleaning method is adopted to carry out first step cleaning, then transmitter and receiver is pulled down, adopt the chemical tendering liquid cleaning of second step, the second time PIG mechanical cleaning method that transmitter and receiver carry out the 3rd step is reinstalled again after end, finally also need to pull down transmitter and receiver, whole mechanical cleaning and chemical tendering are cleaned superpose in cleaning process and need installing/dismounting transmitter and receiver repeatedly, not only step bothers lost labor and time greatly, delay project progress, wherein, the chemical tendering liquid cleaning method adopted in second step needs injection process used time more than lh at twice, then pressure of spraining reaction 3h, process is consuming time longer.
Summary of the invention
1. invent the technical problem that will solve
Can not adapt to solve in prior art the deficiency that long distance flammable explosive gas conveyance conduit need carry out degreasing operation and logical ball pigging operation simultaneously, the invention provides a kind of pollution-free high-efficient long-distance pipe and cleaning method is installed.Adopt technical scheme of the present invention, " wiper-chemical agent-wiper " pigging train makes physics clear up synchronously to carry out with chemical passivation, reach the double effects of siphunculus, rust cleaning, passivation simultaneously, degreasing degreasing is carried out again after rust cleaning, passivation, construction period is short, cost is low, degreasing agent degreasing effect is good, has obvious Social benefit and economic benefit.
2. technical scheme
For achieving the above object, technical scheme provided by the invention is:
A kind of pollution-free high-efficient long-distance pipe of the present invention installs cleaning method, and it is characterized in that, its step is as follows:
Preparation before step one, pigging
Fixedly secure with support after ball serving device, ball collecting device are arranged on pipe ends to be cleaned; Mounting safety valve on ball serving device and ball collecting device, all valves of shutdown system and blind plate, to system injecting compressed air, along the interim pipe of pipeline line walking inspection with or without leakage position; Treat pipe blow-through after systems axiol-ogy is qualified to calibrate, be ready for sending enter pipeline to be cleaned calibrate ball and other wiper inside is all provided with signal projector, match to use with signal tracing device and calibrate ball, wiper position in real time; Ball of calibrating with signal projector is sent into pipeline to be cleaned by ball serving device, operation is calibrated ball and is detected pipeline to be cleaned, select the follow-up wiper that diameter is applicable to, wiper comprises polyurethane foam pigging, wire brush pig, spiral brush sifter wiper, polyurethane wiper and sponge wiper;
Step 2, pipe blow-through
This step comprises drying operation
After above-mentioned steps terminates, first polyurethane foam wiper is sent and enter pipeline to be cleaned (1), water mark residual when leak test, pressure testing is pushed away dry, for subsequent handling creates good conditions;
Rust cleaning, passivation operation
After drying operation, carry out eliminating rust, passivation operation, wire brush pig, spiral brush sifter wiper are continued at random transmitting and enter pipeline to be cleaned, frequency is 1 time/3min, carries out washing away repeatedly, the rust cleaning later stage uses " wiper-chemical agent-wiper " pigging train to eliminate rust, passivation synchronization job, " wiper-chemical agent-wiper " pigging train is the first wiper, second wiper, riddle the combination of the chemical agent between the first wiper and the second wiper in pipeline, chemical agent is exactly " wiper-passivator-wiper " pigging train when being passivator, chemical agent is exactly " wiper-degreasing agent-wiper " pigging train when being degreasing agent, ball serving device first launches the first wiper, by signal projector and signal tracing device, the first wiper is positioned at entrance 10m place to be cleaned, then the second wiper is inserted ball serving device, by in passivator flow in pipes between the first wiper and the second wiper, observe liquid level, guarantee to be full of passivator between the first wiper and the second wiper, in system, injecting compressed air promotes the advance of " wiper-passivator-wiper " pigging train until ball collecting device, and wherein, the formula of passivator is expressed as with mass fraction: natrium nitrosum 2-3%, tertiary sodium phosphate 0.5-1%, water 96%-97.5%,
Chemical degreasing operation
In rust cleaning, after passivation operation completes, and then need to carry out chemical degreasing operation, chemical degreasing operation process is as above-mentioned rust cleaning, passivating process is the same, use " wiper-chemical agent-wiper " pigging train, wherein from liquid-filling valve injection is degreasing agent, the formula of degreasing agent is expressed as with mass fraction: sodium phosphate trimer 2-3.5%, sodium carbonate 1-2%, NaOH 0.5-1.5%, Boratex 0.2-0.4%, disodium ethylene diamine tetraacetate 0.1-0.2%, enuatrol 0.05-0.1%, lauryl sodium sulfate 0.05-0.1%, APES 0.05-0.1%, water 92.1-96.05%,
Drying operation again
After the above-mentioned chemical degreasing end of job, use sponge wiper to send in pipeline to be cleaned from ball serving device, the degreasing agent of pipe interior remnants is pushed away dry;
Step 3, to inspect for acceptance
Check pigging effect, qualified rear nitrogen injection, seal protection, to prevent secondary pollution.
As a further improvement on the present invention, before described step one, pigging, preparation comprises
Ball serving device, ball collecting device are installed,
Described ball serving device comprises one section first and manages temporarily, first interim pipe one end is installed and is connected with pipeline one end to be cleaned, the described first interim pipe other end is provided with blind plate, blind plate can be closed/open, in the middle part of first interim pipe, top is provided with the first atmospheric valve, liquid-filling valve, source of the gas valve and the first Pressure gauge from inside to outside successively, is connected by air compressor by source of the gas valve with ball serving device; Described ball collecting device comprises one section second and manages temporarily, second interim pipe one end is installed and is connected with the pipeline other end to be cleaned, the described second interim pipe other end is provided with blind plate, blind plate can be closed/open, in the middle part of second interim pipe, the second Pressure gauge, the second atmospheric valve and tapping valve are installed from outside to inside successively, second Pressure gauge and the second atmospheric valve are positioned at above ball collecting device, tapping valve is positioned at below ball collecting device, fixedly secure with support after ball serving device, ball collecting device are arranged on pipe ends to be cleaned, wherein, interim pipe answers soaking and washing before installing;
Temporary system leak test, pressure testing,
Mounting safety valve on ball serving device and ball collecting device, the all valves of shutdown system and blind plate, open ball serving device source of the gas valve, clean compressed air is injected to system, observe the first Pressure gauge and the second pressure gauge reading to 0.8Mpa, along the interim pipe of pipeline line walking inspection with or without leakage position, it is qualified for holding time at 0.5h with manifold pressure;
Ball is calibrated in transmitting
Treat pipe blow-through after temporary system detection is qualified to calibrate, ball serving device unlatching source of the gas valve is inserted by with calibrating in ball of signal projector, control system pressure 0.4-0.5MPa, ball is calibrated in operation, to determine not affect the barrier that wiper passes through and the radius of curvature measuring pipeline bend pipe position in pipeline, the position of ball is determined to calibrate by calibrating signal projector in ball and external signal tracker, and calibrate the speed of service of ball, answer casual inspection to calibrate the position at ball place when line walking, and combine the time of launching and calibrating ball, judge that whether its position is reasonable, input compressed-air should be stopped when there is obvious exception to do necessary process, if it is normal to calibrate ball survey result, just carry out next step.
As a further improvement on the present invention, described passivator formula is expressed as with mass fraction: natrium nitrosum 2.5%, tertiary sodium phosphate 0.7%, water 96.8%.
As a further improvement on the present invention, described degreasing agent formula is expressed as with mass fraction: sodium phosphate trimer 2%, sodium carbonate 1%, NaOH 0.5%, Boratex 0.2%, disodium ethylene diamine tetraacetate 0.1%, enuatrol 0.05%, lauryl sodium sulfate 0.05%, APES 0.05%, water 96.05%.
As a further improvement on the present invention, described ball serving device nominal diameter is greater than pipeline nominal diameter to be cleaned.
As a further improvement on the present invention, the first described Pressure gauge and the second pressure gage measuring range are 0 ~ 1.6MPa.
As a further improvement on the present invention, the first described wiper and the second wiper material are polyurethane.
3. beneficial effect
Adopt technical scheme provided by the invention, compared with prior art, there is following remarkable result:
(1) a kind of pollution-free high-efficient long-distance pipe of the present invention installs cleaning method, there is physics cleaning synchronously carry out with chemical passivation, reach the double effects of siphunculus, rust cleaning, passivation simultaneously, degreasing degreasing is carried out again after rust cleaning, passivation, installing/dismounting is not needed repeatedly to receive and dispatch ball device, construction period is short and cost is low, effective, long shelf-life, has obvious Social benefit and economic benefit.
(2) a kind of pollution-free high-efficient long-distance pipe of the present invention installs cleaning method, and passivator, degreasing agent are water base degreasing agent, and follow-up environmental protection treatment is simple, friendly to bad border.
(3) a kind of pollution-free high-efficient long-distance pipe of the present invention installs cleaning method, add tertiary sodium phosphate in degreasing agent, sodium phosphate trimer, disodium ethylene diamine tetraacetate, enuatrol, APES make degreasing agent degreasing effect better, more efficient, not only ensure that long distance gas transmission pipeline later stage use safety, also greatly save the time, the reduction of erection time.
Accompanying drawing explanation
Fig. 1 is the ball serving device that a kind of pollution-free high-efficient long-distance pipe of the present invention installs system in cleaning method;
Fig. 2 is the ball collecting device that a kind of pollution-free high-efficient long-distance pipe of the present invention installs system in cleaning method;
Fig. 3 is " wiper-chemical agent-wiper " pigging train schematic diagram in the present invention;
A kind of pollution-free high-efficient long-distance pipe of Fig. 4 the present invention installs the flow chart of cleaning method.
Label declaration in schematic diagram:
1, pipeline to be cleaned; 21, the first atmospheric valve; 22, liquid-filling valve; 23, source of the gas valve; 24, the first Pressure gauge; 31, the second Pressure gauge; 32, the second atmospheric valve; 33, tapping valve; 4, the first wiper; 5, chemical agent; 6, the second wiper.
Detailed description of the invention
For understanding content of the present invention further, by reference to the accompanying drawings and embodiment the present invention is described in detail.
Embodiment 1
As shown in the figure, a kind of pollution-free high-efficient long-distance pipe of the present invention installs cleaning method, device comprises ball serving device, ball collecting device, wiper, passivator and degreasing agent, described ball serving device, ball collecting device are arranged on pipeline 1 two ends to be cleaned when using, for sending wiper, reclaiming wiper, described ball serving device comprises one section first and manages temporarily, first interim pipe one end is installed and is connected with pipeline 1 one end to be cleaned, the described first interim pipe other end is provided with blind plate, can close/open, in the middle part of first interim pipe, top is from inside to outside provided with the first atmospheric valve 21, liquid-filling valve 22, source of the gas valve 23 and the first Pressure gauge 24 (as shown in Figure 1) successively, be connected with ball serving device by source of the gas valve 23 by air compressor, described ball serving device nominal diameter is greater than (magnitude of interference 10%) pipeline 1 nominal diameter to be cleaned, described ball collecting device comprises one section second and manages temporarily, second interim pipe one end is installed and is connected with pipeline 1 other end to be cleaned, the described second interim pipe other end is provided with blind plate, can close/open, in the middle part of second interim pipe, the second Pressure gauge 31 is installed from outside to inside successively, second atmospheric valve 32 and tapping valve 33, second Pressure gauge 31 and the second atmospheric valve 32 are positioned at above ball collecting device, tapping valve 33 is positioned at (as shown in Figure 2) below ball collecting device, the effect of above-mentioned valve is as follows: atmospheric valve, can control system compressed air pressure size by switch atmospheric valve, liquid-filling valve, can inject chemical liquid when pressure in system is 0MPa, tapping valve, can by the raffinate emptying of pipeline bottom, source of the gas valve, is communicated with air compressor, as logical ball power, the first described Pressure gauge 24 and the second Pressure gauge 31 range are 0 ~ 1.6MPa.
Described wiper is launched into pipeline 1 to be cleaned by ball serving device, for testing or cleaning pipeline 1 inwall to be cleaned, the wiper diameter used is consistent with pipeline 1 internal diameter to be cleaned, and wiper is in pipeline 1 to be cleaned during operation and pipeline to be cleaned 1 inwall gapless; The wiper used in the present invention comprises calibrates ball, polyurethane foam wiper, wire brush pig, spiral brush sifter wiper, polyurethane wiper and sponge wiper, all wiper inside is all provided with signal projector, and signal projector and signal tracing device match to use and detect wiper position in real time.Applicant once received an oxygen, the cleaning installation project of nitrogen long distance delivery pipeline, proprietor requires that above-mentioned pipeline is because relating to the inflammable and explosive media such as oxygen, degreasing operation and the construction of logical ball pigging must be carried out according to the provisions of the relevant regulations issued by the State, the needs installing/dismounting transmitting-receiving ball device repeatedly of degreasing operation and the construction of logical ball pigging is carried out while occurring in prior art, waste time and energy, and degreasing agent of the prior art often skimming processes is slower, thus make the duration longer, in view of the above problems, inventor is creationary to be employed " wiper-chemical agent-wiper " pigging train this combines cleverly, described " wiper-chemical agent-wiper " pigging train comprises: the first wiper 4, first launch in pipeline 1 to be cleaned by ball serving device, by signal projector and signal tracing device, the first wiper 4 is positioned at pipeline 1 entrance 10m place to be cleaned, second wiper 6, by launching in pipeline 1 to be cleaned after ball serving device, and the chemical agent 5 (as shown in Figure 3) be filled in the middle of the first wiper 4 and the second wiper 6, wherein chemical agent 5 comprises passivator and or degreasing agent." wiper-chemical agent-wiper " pigging train makes physics clear up synchronously to carry out with chemical passivation, the double effects of siphunculus, rust cleaning, passivation can be reached simultaneously, degreasing degreasing is carried out again after rust cleaning, passivation, do not need repeatedly that installing/dismounting is sent out, ball collecting device, construction period is short, cost is low, effective, long shelf-life, has obvious Social benefit and economic benefit.
Specific embodiment of the invention process comprises installs sending and receiving ball device, temporary system leak test, pressure testing, launches and calibrates ball, drying operation; rust cleaning, passivation operation, chemical degreasing, drying operation; inspect for acceptance, nitrogen protection and engineering transfer (as shown in Figure 4), and its step is as follows:
Preparation before step one, pigging
Ball serving device, ball collecting device are installed: in advance by the interim pipe soaking and washing of ball serving device, ball collecting device, ball serving device, ball collecting device are fixedly secured with support after being arranged on pipeline 1 two ends to be cleaned;
Temporary system leak test, pressure testing: mounting safety valve on ball serving device and ball collecting device, the all valves of shutdown system and blind plate, open ball serving device source of the gas valve 23, clean compressed air is injected to system, observe the first Pressure gauge 24 and the second Pressure gauge 31 reading to 0.8Mpa, along the interim pipe of pipeline line walking inspection with or without leakage position, it is qualified for holding time at 0.5h with manifold pressure;
Ball is calibrated in transmitting: treat pipe blow-through 1 after temporary system detection is qualified and calibrate, ball serving device unlatching source of the gas valve is inserted by with calibrating in ball of signal projector, control system pressure 0.4-0.5MPa, specifically in the present embodiment, control system pressure is at 0.4MPa, that runs and treat logical bulb road same size calibrates ball, to determine not having in operational system to hinder the barrier calibrated ball and advance.And then choose that specification treats logical bulb road slightly larger than (magnitude of interference 3%-10%) calibrate ball, to measure the appropriate gauge of follow-up wiper in operational system.Because calibrating ball in running, generally can not there is blocking in straight tube position, easily blocking occurs at bend position, radius of curvature is less, more easily occurs.In the present embodiment the magnitude of interference 5% calibrate ball can meet bend position by requiring, larger friction effect can be reached again.The position of ball is determined to calibrate by calibrating signal projector in ball and external signal tracker, and calibrate the speed of service of ball, answer casual inspection to calibrate the position at ball place when line walking, and combine the time of launching and calibrating ball, judge that whether its position is reasonable, when finding that in running pressure gauge reading continues to raise then explanation and blocking phenomenon may occur.Should input compressed-air be stopped, using signal tracing device to determine whether the situation of calibrating ball is being advanced or maintained static, and as maintained static, being defined as there occurs blocking, need increasing compressed-air actuated pressure to obtain larger motive force; When pressure raises 1.5 times close to pipe design pressure, calibrate ball still motionless, under the prerequisite of accurately locating, flame cutter need being used to cut in calibrating before and after ball, manually removing jam.If calibrate ball to survey result normally, just carry out next step.
Step 2, utilize wiper and passivator, degreasing agent pipe blow-through
Drying operation: after above-mentioned steps terminates, first uses the polyurethane foam wiper of the diameter magnitude of interference 5% to push away dry, for subsequent handling creates good conditions by water mark residual during pressure testing.
Rust cleaning, passivation operation: pipeline is after rust cleaning of being everlasting, still new corrosion can be there is in matrix after contacting with air, therefore the present embodiment employs wiper train and carries passivator secretly, rust cleaning, passivation are synchronously carried out, secondary rust amount effectively can be limited, for follow-up degreasing creates favorable conditions after rust cleaning is qualified.After drying operation, carry out eliminating rust, passivation operation, wire brush pig, spiral brush sifter wiper are continued at random transmission and enter pipeline 1 to be cleaned, frequency is 1 time/3min, carries out washing away, till can not washing away dirt repeatedly; Construction corrosion in early stage is more, and wiper has heavy wear, should change in time.Use that " wiper-chemical agent-wiper " pigging train carries out eliminating rust, passivation synchronization job the rust cleaning later stage, " wiper-chemical agent-wiper " pigging train is the first wiper, the second wiper, riddle the combination of the chemical agent between the first wiper and the second wiper in pipeline, chemical agent is exactly " wiper-passivator-wiper " pigging train when being passivator, is exactly " wiper-degreasing agent-wiper " pigging train when chemical agent is degreasing agent." wiper-chemical agent-wiper " pigging train is " wiper-passivator-wiper " pigging train in this step, it is as follows that it sends into pipeline 1 method to be cleaned, the first step, close all valves of ball serving device, open the first atmospheric valve 21, observe the first Pressure gauge 24 pressure, make pressure in ball serving device reach 0MPa; Second step, open blind plate and the first wiper 4 is put into ball serving device, close blind plate and the first atmospheric valve 21, open source of the gas valve 23 and control folding amplitude, make ball serving device pressure remain on 0.2MPa, by signal tracing device, the first wiper 4 is positioned at pipeline 10m place, and records running time, according to the speed of service of the wiper that running time can survey, its position can be extrapolated when there is blocking phenomenon; 3rd step, opens the first atmospheric valve 21, when pressure reaches 0MPa in ball serving device, opens ball serving device blind plate, inserts the second wiper 6; 4th step, opens liquid-filling valve 22, is injected by passivator in ball serving device, observes liquid level, guarantees to be full of passivator between the first wiper 4, second wiper 6; 5th step, close liquid-filling valve 22, ball serving device blind plate and the first atmospheric valve 21, control the folding amplitude of source of the gas valve 23, ball serving device pressure is made to remain on 0.2-0.5MPa, specifically in the present embodiment, ball serving device pressure remains on 0.4MPa, and compressed air promotes " wiper-passivator-wiper " train and advances until ball collecting device.After above-mentioned " wiper-passivator-wiper " train arrives ball collecting device, removal process is as follows, the first step, after the first wiper 4 in " wiper-passivator-wiper " train enters ball collecting device, opens tapping valve 33 and collects passivator; Second step, when after passivator emptying, the second wiper 6 also enters ball collecting device, closes tapping valve 33, closes air compressor power supply; Open send out, the first atmospheric valve 21 of ball collecting device and the second atmospheric valve 32 to manifold pressure be 0MPa, open the blind plate of ball collecting device, reclaim the first wiper 4 and the second wiper 6; 3rd step, closes the blind plate of ball collecting device, closes the first atmospheric valve 21 and the second atmospheric valve 32 and other valves, opens air compressor power supply, open the source of the gas valve 23 of ball serving device, repeat ball serving device aforesaid operations.When observing that pipeline other end inner surface is steel gray, pipe outlet without slag bits and the cleanliness factor on the first wiper 4 received and the second wiper 6 surface can accept time, can stop operation and proceed to next procedure.Wherein, passivator formula is expressed as with mass fraction: natrium nitrosum 2.5%, tertiary sodium phosphate 0.7%, water 96.8%.Specifically in the present embodiment, the first wiper 4 and the second wiper 6 are polyurethane wiper.
Chemical degreasing operation: in rust cleaning, after passivation completes, and then need to carry out chemical degreasing, chemical degreasing operation process is as above-mentioned rust cleaning, passivating process is the same, use " wiper-chemical agent-wiper " pigging train, wherein from liquid-filling valve injection is degreasing agent, degreasing agent is water base degreasing agent, formula is expressed as with mass fraction: sodium phosphate trimer 2%, sodium carbonate 1%, NaOH 0.5%, Boratex 0.2%, disodium ethylene diamine tetraacetate 0.1%, enuatrol 0.05%, lauryl sodium sulfate 0.05%, APES 0.05%, water 96.05%.Pipeline 1 to be cleaned sent into by " wiper-degreasing agent-wiper " train and recovery method is sent into above-mentioned " wiper-passivator-wiper " train, recovery method.The liquid consumption of above-mentioned passivator and degreasing agent uses following formulae discovery:
Q＝3.14×r×r×L×1000
Q is chemical liquid consumption, unit: rise
R is internal diameter of the pipeline radius, unit: rice
L is spacing between two wipers, and meter gets 10 meters.
Sending " wiper-degreasing agent-wiper " pigging train continuously in this process, irradiating pipe interior with the fluorescence caused without grease with use oil analyses instrument to measure till oil content is not more than 200mg/L from the degreasing agent of pipe end outflow until using black light lamp
Drying operation again: after above-mentioned pipe blow-through operation is qualified, uses sponge wiper to send in pipeline 1 to be cleaned from ball serving device, pushes away dry by the degreasing agent of pipe interior remnants.
Step 3, process of inspecting for acceptance
Check, check and accept: check according to national regulation " degreasing engineering construction and acceptance specification " HG 20202-2000, " Code for construction and acceptance of industrial metallic pipeline engineering " GB50235-97 and liquid air quality control file " pipeline INTERNAL CLEANING SPECIFICATIONS " ALC-T-SP-PIP-03, " OXYGEN CLEAN PIPELINES INSPECTION & ACCEPTANCE specifications " ALC-T-SP-PIP-11.Rust cleaning: consider to be worth doing without rusty stain, scale crust and other slag with pipe interior; With the cross section that sponge cleaner is cut open, it is qualified that contaminated length is less than 3cm.Dry: pipe interior is qualified without moisture, moisture.Degreasing: quantitative analysis is with inner-walls of duct unstressed configuration under the infrablack line that wavelength is 320nm ~ 380nm irradiates, with the white filter paper wiping degreasing part surface of clean drying, without grease vestige on paper, oil content the degreasing agent flowed out from pipe end is measured in its quantitative analysis, and to be not more than 200mg/L be qualified with oil analyses instrument.
Nitrogen protection: nitrogen-sealed protection is carried out, to prevent secondary pollution to the pipeline of passed examination.Pipeline can keep no longer corroding in a period of time after passivation, and for reaching high-cleanness, high requirement during operation, need to introduce without oil, clean nitrogen to blowing pipeline after passed examination, finish-drying pipe interior, displaces air.Reach-400C stopping purging when port of export dew point hygrometer detects dew point during purging, closed protective is carried out to pipe end.
Engineering is transferred.
Embodiment 2
In the present embodiment, long-distance pipe cleaning method is substantially with embodiment 1 year, and difference is, the formula of passivator is expressed as natrium nitrosum 2%, tertiary sodium phosphate 0.5% with mass fraction, water 97.5%; As in pipeline, grease contamination is serious, then degreasing agent need strengthen dosing in right amount, fills a prescription to be expressed as with mass fraction: sodium phosphate trimer 3.5%, sodium carbonate 2%, NaOH 1.5%, Boratex 0.4%, disodium ethylene diamine tetraacetate 0.2%, enuatrol 0.1%, lauryl sodium sulfate 0.1%, APES 0.1%, water 92.1%.Passivator of the present invention, degreasing agent are water base degreasing agent, and follow-up environmental protection treatment is simple, friendly to bad border, and the formula of this degreasing agent makes degreasing agent degreasing effect efficient, not only ensure that long distance gas transmission pipeline later stage use safety, also greatly save the time, the reduction of erection time.
Embodiment 3
In the present embodiment, long-distance pipe cleaning method is substantially with embodiment 1 year, and difference is, the formula of passivator is expressed as natrium nitrosum 3%, tertiary sodium phosphate 1% with mass fraction, water 96%; The formula of degreasing agent is expressed as sodium phosphate trimer 3.0%, sodium carbonate 1.5%, NaOH 1.0%, Boratex 0.3%, disodium ethylene diamine tetraacetate 0.1%, enuatrol 0.08%, lauryl sodium sulfate 0.08%, APES 0.07%, water 93.87% with mass fraction.
Embodiment 4
In the present embodiment, long-distance pipe cleaning method is substantially with embodiment 1 year, and difference is, the formula of passivator is expressed as natrium nitrosum 2.3%, tertiary sodium phosphate .0.8% with mass fraction, water 96.9%; The formula of degreasing agent is expressed as sodium phosphate trimer 2.8%, sodium carbonate 1.7%, NaOH 1.2%, Boratex 0.25%, disodium ethylene diamine tetraacetate 0.15%, enuatrol 0.07%, lauryl sodium sulfate 0.09%, APES 0.06%, water 93.68% with mass fraction.
Schematically above be described the present invention and embodiment thereof, this description does not have restricted, and also just one of the embodiments of the present invention shown in accompanying drawing, actual structure is not limited thereto.So, if those of ordinary skill in the art enlightens by it, when not departing from the invention aim, designing the frame mode similar to this technical scheme and embodiment without creationary, all should protection scope of the present invention be belonged to.
Claims (7)
1. pollution-free high-efficient long-distance pipe installs a cleaning method, and it is characterized in that, its step is as follows:
Preparation before step one, pigging
Ball serving device, ball collecting device are fixedly secured with support after being arranged on pipeline to be cleaned (1) two ends; Mounting safety valve on ball serving device and ball collecting device, all valves of shutdown system and blind plate, to system injecting compressed air, along the interim pipe of pipeline line walking inspection with or without leakage position; Treat pipe blow-through (1) after systems axiol-ogy is qualified to calibrate, be ready for sending enter pipeline to be cleaned (1) calibrate ball and other wiper inside is all provided with signal projector, match to use with signal tracing device and calibrate ball, wiper position in real time; Ball of calibrating with signal projector is sent into pipeline to be cleaned (1) by ball serving device, operation is calibrated ball and is detected pipeline to be cleaned (1), select the follow-up wiper that diameter is applicable to, wiper comprises polyurethane foam pigging, wire brush pig, spiral brush sifter wiper, polyurethane wiper and sponge wiper;
Step 2, pipe blow-through
This step comprises drying operation,
After above-mentioned steps terminates, first polyurethane foam wiper is sent and enter pipeline to be cleaned (1), water mark residual when leak test, pressure testing is pushed away dry, for subsequent handling creates good conditions;
Rust cleaning, passivation operation,
After drying operation, carry out eliminating rust, passivation operation, wire brush pig, spiral brush sifter wiper are continued at random transmission and enter pipeline to be cleaned (1), frequency is 1 time/3min, carries out washing away repeatedly, the rust cleaning later stage uses " wiper-chemical agent-wiper " pigging train to eliminate rust, passivation synchronization job, " wiper-chemical agent-wiper " pigging train is the first wiper (4), second wiper (6), riddle the combination of the chemical agent between the first wiper (4) and the second wiper (6) in pipeline, chemical agent is exactly " wiper-passivator-wiper " pigging train when being passivator, chemical agent is exactly " wiper-degreasing agent-wiper " pigging train when being degreasing agent, ball serving device first launches the first wiper (4), by signal projector and signal tracing device, the first wiper (4) is positioned at pipeline to be cleaned (1) entrance 10m place, then the second wiper (6) is inserted ball serving device, by in passivator flow in pipes between the first wiper (4) and the second wiper (6), observe liquid level, guarantee to be full of passivator between the first wiper (4) and the second wiper (6), in system, injecting compressed air promotes the advance of " wiper-passivator-wiper " pigging train until ball collecting device, and wherein, the formula of passivator is expressed as with mass fraction: natrium nitrosum 2-3%, tertiary sodium phosphate 0.5-1%, water 96%-97.5%,
Chemical degreasing operation,
In rust cleaning, after passivation operation completes, and then need to carry out chemical degreasing operation, chemical degreasing operation process is as above-mentioned rust cleaning, passivating process is the same, use " wiper-chemical agent-wiper " pigging train, wherein from liquid-filling valve injection is degreasing agent, the formula of degreasing agent is expressed as with mass fraction: sodium phosphate trimer 2-3.5%, sodium carbonate 1-2%, NaOH 0.5-1.5%, Boratex 0.2-0.4%, disodium ethylene diamine tetraacetate 0.1-0.2%, enuatrol 0.05-0.1%, lauryl sodium sulfate 0.05-0.1%, APES 0.05-0.1%, water 92.1-96.05%,
Drying operation again,
After the above-mentioned chemical degreasing end of job, use sponge wiper to send in pipeline to be cleaned (1) from ball serving device, the degreasing agent of pipe interior remnants is pushed away dry;
Step 3, to inspect for acceptance
Check pigging effect, qualified rear nitrogen injection, seal protection, to prevent secondary pollution.
2. a kind of pollution-free high-efficient long-distance pipe according to claim 1 installs cleaning method, it is characterized in that: before described step one, pigging, preparation comprises
Ball serving device, ball collecting device are installed
Described ball serving device comprises one section first and manages temporarily, first interim pipe one end is installed and is connected with pipeline to be cleaned (1) one end, the described first interim pipe other end is provided with blind plate, blind plate can be closed/open, in the middle part of first interim pipe, top is provided with the first atmospheric valve (21), liquid-filling valve (22), source of the gas valve (23) and the first Pressure gauge (24) from inside to outside successively, is connected by air compressor by source of the gas valve (23) with ball serving device, described ball collecting device comprises one section second and manages temporarily, second interim pipe one end is installed and is connected with pipeline to be cleaned (1) other end, the described second interim pipe other end is provided with blind plate, blind plate can be closed/open, in the middle part of second interim pipe, the second Pressure gauge (31) is installed from outside to inside successively, second atmospheric valve (32) and tapping valve (33), second Pressure gauge (31) and the second atmospheric valve (32) are positioned at above ball collecting device, tapping valve (33) is positioned at below ball collecting device, by ball serving device, ball collecting device fixedly secures with support after being arranged on pipeline to be cleaned (1) two ends, wherein, interim pipe answers soaking and washing before installing,
Temporary system leak test, pressure testing
Mounting safety valve on ball serving device and ball collecting device, the all valves of shutdown system and blind plate, open ball serving device source of the gas valve (23), clean compressed air is injected to system, observe the first Pressure gauge (24) and the second Pressure gauge (31) reading to 0.8Mpa, along the interim pipe of pipeline line walking inspection with or without leakage position, it is qualified for holding time at 0.5h with manifold pressure;
Ball is calibrated in transmitting
Treat pipe blow-through (1) after temporary system detection is qualified to calibrate, ball serving device unlatching source of the gas valve is inserted by with calibrating in ball of signal projector, control system pressure 0.4-0.5MPa, ball is calibrated in operation, to determine not affect the barrier that wiper passes through and the radius of curvature measuring pipeline bend pipe position in pipeline, the position of ball is determined to calibrate by calibrating signal projector in ball and external signal tracker, and calibrate the speed of service of ball, answer casual inspection to calibrate the position at ball place when line walking, and combine the time of launching and calibrating ball, judge that whether its position is reasonable, input compressed-air should be stopped when there is obvious exception to do necessary process, if it is normal to calibrate ball survey result, just carry out next step.
3. a kind of pollution-free high-efficient long-distance pipe according to claim 1 installs cleaning method, it is characterized in that: described passivator formula is expressed as with mass fraction: natrium nitrosum 2.5%, tertiary sodium phosphate 0.7%, water 96.8%.
4. a kind of pollution-free high-efficient long-distance pipe according to claim 1 installs cleaning method, it is characterized in that: described degreasing agent formula is expressed as with mass fraction: sodium phosphate trimer 2%, sodium carbonate 1%, NaOH 0.5%, Boratex 0.2%, disodium ethylene diamine tetraacetate 0.1%, enuatrol 0.05%, lauryl sodium sulfate 0.05%, APES 0.05%, water 96.05%.
5. a kind of pollution-free high-efficient long-distance pipe according to claim 2 installs cleaning method, it is characterized in that: described ball serving device nominal diameter is greater than pipeline to be cleaned (1) nominal diameter.
6. a kind of pollution-free high-efficient long-distance pipe according to claim 5 installs cleaning method, it is characterized in that: described the first Pressure gauge (24) and the second Pressure gauge (31) range are 0 ~ 1.6MPa.
7. a kind of pollution-free high-efficient long-distance pipe according to claim 5 installs cleaning method, it is characterized in that: described the first wiper (4) and the second wiper (6) material are polyurethane.
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