CN104190676B - The cleaning of nuclear power station pipeline inner wall corrosion product and coating coating unit - Google Patents
The cleaning of nuclear power station pipeline inner wall corrosion product and coating coating unit Download PDFInfo
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- CN104190676B CN104190676B CN201410382643.7A CN201410382643A CN104190676B CN 104190676 B CN104190676 B CN 104190676B CN 201410382643 A CN201410382643 A CN 201410382643A CN 104190676 B CN104190676 B CN 104190676B
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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
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C7/00—Apparatus specially designed for applying liquid or other fluent material to the inside of hollow work
- B05C7/02—Apparatus specially designed for applying liquid or other fluent material to the inside of hollow work the liquid or other fluent material being projected
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Abstract
The present invention relates to the cleaning of a kind of nuclear power station pipeline inner wall corrosion product and coating coating unit, comprise main gas circuit, air supply system, add sand system, water-adding system, application system, control system; Main gas circuit front end is connected with air supply system, and rear end forms sinking Duan Bingyu pipeline and is connected; Main gas circuit is provided with main blow down valve; What add that sand system comprises adds sand tank, and the sand mouth that adds adding sand tank is provided with sand valve, and sand export is connected with main gas circuit through lower sand valve; Water-adding system comprises and adds water pot, and the filler adding water pot is provided with water supply valve, and delivery port is connected with main gas circuit through lower water valve; Application system is connected to the front end of the sinking section of main gas circuit, comprises and adds coating hopper, and the discharging opening adding coating hopper is connected with main gas circuit through paint valve; Control system is connected with main blow down valve, upper sand valve, lower sand valve, water supply valve, lower water valve respectively.The present invention both can realize the cleaning of inner-walls of duct, also can realize the coating of inner-walls of duct coating, had the scope of application widely.
Description
Technical field
The present invention relates to a kind of corrosion product for clearing up inner-walls of duct and the device to inner-walls of duct coating coating, being particularly useful for the path in nuclear power station, bending, tapered pipeline.
Background technology
The pipeline of below diameter 500mm, generally in engineering is summarised as small-bore pipeline.The pipeline of the materials such as carbon steel, cast iron, stainless steel there will be corrosion and dirt retention problems in its inside after long-term use, affects the water flux density of pipeline, even occurs the problems such as blocking or corrosion failure.
Because bore is too small, people is unreachable, and the Comprehensive Administration of Corrosion of small-bore pipeline is a world-class difficult problem.At present there are tens kinds to the cleaning of in-service pipeline and recovery technique in the world, sum up and mainly comprise five classes: chemical method (pickling etc.), vibratory drilling method (ultrasonic wave etc.), electromagnetic method (electric shock, magnetization etc.), lining method (interspersed soft, hard tube etc.), Mechanical Method (built-in tool, robot etc.).
First three methods only has the function of cleaning dredging to pipeline, without the function of transformation, strengthening, and exist chemical residual, cleaning not thoroughly, cannot in shortcomings such as inwall applying coatings.Conventional chemical method cleaning, needs a large amount of chemical substances, and needs to soak reaction for a long time, the rusty stain of pipe surface can be cleared up, then need to change cleaning agent for greasy dirt, other foreign matter etc., the human and material resources of at substantial and time, consequent refuse also will contaminated environment.Latter two method not only has the function of cleaning dredging to pipeline, transform in addition, strengthen function, the coating of pipe internal coating can be carried out, but these two kinds of methods still run into the four problems being difficult to overcome: pipeline turning, pipeline reducing diameter, pipeline are vertical, small-bore pipeline, and thus practical application is greatly limited.
Summary of the invention
The object of this invention is to provide one and both there is cleaning dredging function, there is again coating coating functions, and scope of application nuclear power station pipeline inner wall corrosion product cleaning widely and coating coating unit.
For achieving the above object, the technical solution used in the present invention is:
The cleaning of a kind of nuclear power station pipeline inner wall corrosion product and coating coating unit, purging for carrying out corrosion product to the inwall of pipeline in nuclear power station is cleared up and is coated with and is covered with coating, it comprise main gas circuit, air feed air supply system, for sand add sand system, water supply water-adding system, for the application system of coating and control system;
The front end of described main gas circuit is connected with described air supply system, and the rear end of described main gas circuit forms a sinking section and is connected at the pipeline that described sinking Duan Houyu is for clearance; Described main gas circuit is provided with main blow down valve;
Described add sand system and described water-adding system be connected to described main gas circuit middle part and after being positioned at described main blow down valve;
Described add sand system comprise have add sand mouth and sand export add sand tank, the described sand mouth that adds adding sand tank is provided with sand valve, the described sand export adding sand tank is connected with described main gas circuit via lower sand valve, and the described sand tank that adds also is connected with the sand return-air path regulating wherein air pressure;
Described water-adding system comprise there is filler and delivery port add water pot, the described filler adding water pot is provided with water supply valve, the described delivery port adding water pot is connected with described main gas circuit via lower water valve, and the described water pot that adds also is connected with the water return-air path regulating wherein air pressure;
Described application system is connected to the front end of the sinking section of described main gas circuit, it comprise there is discharging opening add coating hopper, the described discharging opening adding coating hopper is connected with described main gas circuit via paint valve;
Described control system is connected with described main blow down valve, described upper sand valve, described lower sand valve, described water supply valve, described lower water valve respectively.
Preferably, the rear end of described main gas circuit is connected with pipeline for clearance by rubber tube.
Preferably, described air supply system comprises the compression gas tank with air inlet and gas outlet, and the air inlet of described compression gas tank is connected with compressed gas source, and the gas outlet of described compression gas tank is connected with described main gas circuit.
Preferably, the described sand system that adds also comprises and adds sand hopper, described add sand hopper by described upper sand valve be connected to described add sand tank add sand mouth.
Preferably, described water-adding system also comprises watered cup, and described watered cup is connected to the described filler adding water pot by described water supply valve.
Preferably, described sand return-air path is connected with described main gas circuit respectively with described water return-air path, described sand return-air path is provided with the sand return-air valve controlled by described control system, described water return-air path is provided with the water return-air valve controlled by described control system.
Preferably, described control system comprises PLC, the interactive device be connected with described PLC, the power supply of powering for described PLC and described interactive device.
Preferably, the sinking angle of the sinking section in described main gas circuit is 45 °.
Preferably, the both sides of described main blow down valve are connected with bypass gas circuit, described bypass gas circuit are provided with the by-passing valve controlled by described control system.
Preferably, it also comprises several pressure transmitters, and the pressure transmitter described in each is connected with described control system.
Operation principle of the present invention is: the gas that provided by air supply system is driven and adds sand that sand system provides and the water that ponding system provides enters in pipeline for clearance jointly, carries out corrosion product cleaning to the inwall of pipeline; After inner-walls of duct drying, then enter in pipeline for clearance by the coating that the gas that air supply system provides drives application system to provide, paint is carried out to the inwall of pipeline.
Because technique scheme is used, the present invention compared with prior art has following advantages: the present invention both can realize first clearing up the corrosion product of inner-walls of duct, the coating again inner-walls of duct being carried out to coating can also be realized, namely both there is the function of cleaning dredging, there is again the function of transformation strengthening, the situation such as elbow, reducing, transverse tube, vertical tube of pipeline is all unaffected, has the scope of application widely.
Accompanying drawing explanation
Accompanying drawing 1 is structural representation of the present invention.
Accompanying drawing 2 is workflow diagram of the present invention.
Detailed description of the invention
Below in conjunction with embodiment shown in the drawings, the invention will be further described.
Embodiment one: shown in accompanying drawing 1.The cleaning of a kind of nuclear power station pipeline inner wall corrosion product and coating coating unit, it comprise main gas circuit, air feed air supply system, add sand system, the water-adding system of water supply, the application system of confession coating and control system for sand.
Front-end and back-end are called respectively in the two ends of horizontally disposed main gas circuit, so the following stated " front " and " afterwards " are all the front-end and back-end with reference to main gas circuit.The front end of main gas circuit is connected with air supply system.Air supply system comprises the compression gas tank with air inlet and gas outlet, and the compressed gas source that air inlet and the oilless air compressor of compression gas tank provide is connected, and the gas outlet of compression gas tank is connected with main gas circuit by the first flange.Compression gas tank is provided with safety valve.The rear end of main gas circuit forms the sinking section that sinking angle degree is 45 °, and be connected with pipeline for clearance by high-pressure anti-wear rubber tube after sinking section, the two ends of this sinking section are connected with rubber tube with the other parts of main gas circuit with the second flange respectively by inner flange.Main gas circuit be provided with main blow down valve and suddenly stop valve, suddenly stopping the front end that valve is positioned at main blow down valve.The both sides of main blow down valve are also connected with bypass gas circuit, and bypass gas circuit is provided with by-passing valve.
Add sand system and water-adding system be connected to main gas circuit middle part and after being positioned at main blow down valve.Add sand system to comprise having and add adding sand tank, adding sand hopper of sand mouth and sand export.Add sand hopper to be connected with the sand mouth that adds adding sand tank, the sand mouth that adds adding sand tank is provided with sand valve, and on this, sand valve can be arranged on and adds sand hopper and add on the pipeline adding between sand mouth of sand tank.The sand export adding sand tank is connected with main gas circuit via lower sand valve, and the sand export adding sand tank is also connected by pipeline with main gas circuit, and lower sand valve is arranged on this pipeline.Add sand tank and be also connected with the sand return-air path regulating wherein air pressure, sand return-air path is connected with the front end of main blow down valve in main gas circuit, and sand return-air path is provided with sand return-air valve.Water-adding system comprise there is filler and delivery port add water pot, watered cup, watered cup is connected with the filler adding water pot, the filler adding water pot is provided with water supply valve, and this water supply valve can be arranged on the pipeline between watered cup and the filler adding water pot.The delivery port adding water pot is connected with main gas circuit via lower water valve, and the delivery port adding water pot is also connected by pipeline, and lower water valve is arranged on this pipeline.Add water pot and be also connected with the water return-air path regulating wherein air pressure, water return-air path is connected with main gas circuit, and water return-air path is provided with water return-air valve.One end that water return-air path is connected with main gas circuit can be merged into a pipeline with one end that sand return-air path is connected with main gas circuit.
Application system is connected to the front end of the sinking section of main gas circuit, it comprise there is discharging opening add coating hopper, the discharging opening adding coating hopper is connected with main gas circuit via paint valve, and the discharging opening adding coating hopper is also connected with main gas circuit through pipeline, and paint valve is arranged on this pipeline.
Control system comprises PLC, the interactive device be connected with PLC, the power supply of powering for PLC and interactive device.Wherein, in PLC with the control program of package unit; Power acquisition 24V battery, it has the charging inlet that can be connected with AC power; Interactive device adopts HMI touch-screen.PLC in control system respectively with main blow down valve, upper sand valve, lower sand valve, water supply valve, lower water valve, anxious stop valve, sand return-air valve, water return-air valve, by-passing valve be connected and control their opening and closing.Above-mentioned each valve is pneumatic ball valve, power supply needed for its electromagnetic actuator is also supplied by 24V battery, external gas source is then from operated pneumatic valve header, operated pneumatic valve header is connected with the compression gas tank in air supply system as the pipeline of connector by having three-flange, this pipeline is provided with header steam supply valve.Paint valve is manual ball valve.
Several pressure transmitters that is connected with the PLC of control system are also set in this device, are respectively: (1) detects main blow down valve and anxious the first pressure transmitter stopping valve front end, compression gas tank rear end gas atmosphere in main gas circuit; (2) second pressure transmitter of sinking section front end place gas atmosphere of main blow down valve rear end, main gas circuit is detected; (3) the 3rd pressure transmitter of the gas atmosphere at one article of pipeline place that water return-air path and sand return-air path are merged into is detected; (4) the 4th pressure transmitter adding sand tank internal gas pressure is detected; (5) the 5th pressure transmitter adding water pot internal gas pressure is detected.These pressure transmitters send detected force value the PLC of control system to, and PLC controls package unit work according to the situation of these force value again.
This device before use, need to select according to the diameter of the pipeline of on-the-spot required process this device surveying different model, its difference is mainly that each pipeline of device inside, storage tank are different with the size dimension of the parts such as valve, main gas circuit caliber need caliber be identical on earth with pipe for clearance.To process the pipeline of DN100 bore, an entrance of this pipeline selected good and an outlet, the pipeline total length between gateway should more than the pipe diameter of 2000 times, namely within 200 meters, and general on the way arm all isolate.Be connected with the entrance of pipeline by high-pressure anti-wear rubber tube by this device, the outlet of pipeline connects a special waste collecting tank, for collecting the inner-walls of duct corrosion product, sewage etc. that clear.
The workflow of this device as shown in Figure 2.First air compressor machine is opened, in compression gas tank, provide compressed air, make the pressure in compression gas tank reach more than 0.65MPa, then open the purging to pipeline, process is as follows: first open and suddenly stop valve and close other each valves and lock, prohibit the use HMI touch-screen to operate PLC.Then, detect and add in sand tank whether be less than 0.15MPa with the pressure added in water pot, if so, then can add sand to adding in sand tank and add water to adding in water pot; If not, then open lower sand valve and the exhaust of lower water valve, make to add sand tank with the pressure drop added in water pot to 0.15MPa or following, then close lower sand valve and lower water valve, now can add sand to adding in sand tank and add water to adding in water pot.Then, add sand to adding in sand tank and add water to adding in water pot, opening sand valve and water supply valve respectively, by the time artificial by adding sand hopper and watered cup adds water respectively to adding in sand tank to add sand and add in water pot, add rear pass and close sand valve and water supply valve.Whether PLC can complete the action of once opening and closing and judge to add sand and add water whether complete by detecting upper sand valve and water supply valve.Add sand valve and water supply valve in rear locking and wait for subsequent operation.
The purging scale removal process of the inwall of pipeline in nuclear power station being carried out to corrosion product is as follows: perform when selecting the main air pressure of purge mode in compression gas tank to be greater than 0.65MPa and purge prune job.Open sand return-air valve and water return-air valve to adding sand tank and adding insufflation gas in water pot, when sand tank to be added and the pressure added in water pot are all consistent with main air pressure, perform next step.Open lower sand valve and lower water valve simultaneously, and open main blow down valve after postponing 0.5 second, now, the gas provided by air supply system together enters into pipeline for clearance by main gas circuit with adding sand that sand tank provides and add water pot the water provided and flows, thus carry out the worn dirt of blast and purge rinsing to the inwall of pipeline, in this process, main air pressure reduces gradually.Consistent with main air pressure and when being less than 0.3MPa, terminate once to purge scale removal process until the air pressure of the gas outlet of main gas circuit.General, at least need to purge cleaning more than 8 times to a pipeline.
After whole purging has been cleared up, adopt manual control mode, maintenance suddenly stops valve and main blow down valve is often opened, and the compressed air adopting air supply system to provide continues blowing more than 30 minutes to pipeline, make inner-walls of duct dry, the coating of coating for inner-walls of duct is ready.
After drying up in pipeline, adopt manual control mode, close except the anxious whole valves stopped except valve, the coating be stirred is added by adding coating hopper, be arranged on the front end of the sinking section of main gas circuit due to application system, so aggregate can following current to main gas circuit rear end and the other parts of main gas circuit can not be polluted.After coating installs additional, when main air pressure reaches more than 0.65MPa, manually slowly open by-passing valve, when the gas outlet pressure increase of main gas circuit is to more than 0.5MPa, open main blow down valve, carry out first time spray painting.When main air pressure is reduced to below 0.4MPa, close by-passing valve and main blow down valve, when main air pressure returns to more than 0.65MPa, only open main blow down valve and carry out second time spray painting, and spray coating several times again according to the process of second time spray painting, until spray painting reaches 4 to 5 times altogether, complete and the paint coatings of the inwall of pipeline in nuclear power station is applied.
This device is particularly useful for cleaning nuclear power station 13 ~ 500mm bore, SEP(potable water system), JPD, JPP, JPH(fire-fighting system), GFR(steam turbine security oil system) etc. the inner-walls of duct corrosion product of system or the equipment of contamination, and can inside coating coating be carried out.Compared to existing 5 kinds of pipeline cleanings and restorative procedure, there is dual-use function and to the form of pipeline without particular/special requirement, thus applied widely.
Above-described embodiment, only for technical conceive of the present invention and feature are described, its object is to person skilled in the art can be understood content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalences done according to Spirit Essence of the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (10)
1. a nuclear power station pipeline inner wall corrosion product cleaning and coating coating unit, purging for carrying out corrosion product to the inwall of pipeline in nuclear power station is cleared up and is coated with and is covered with coating, it is characterized in that: it comprise main gas circuit, air feed air supply system, for sand add sand system, water supply water-adding system, for the application system of coating and control system;
The front end of described main gas circuit is connected with described air supply system, and the rear end of described main gas circuit forms a sinking section and is connected at the pipeline that described sinking Duan Houyu is for clearance; Described main gas circuit is provided with main blow down valve;
Described add sand system and described water-adding system be connected to described main gas circuit middle part and after being positioned at described main blow down valve;
Described add sand system comprise have add sand mouth and sand export add sand tank, the described sand mouth that adds adding sand tank is provided with sand valve, the described sand export adding sand tank is connected with described main gas circuit via lower sand valve, and the described sand tank that adds also is connected with the sand return-air path regulating wherein air pressure;
Described water-adding system comprise there is filler and delivery port add water pot, the described filler adding water pot is provided with water supply valve, the described delivery port adding water pot is connected with described main gas circuit via lower water valve, and the described water pot that adds also is connected with the water return-air path regulating wherein air pressure;
Described application system is connected to the front end of the sinking section of described main gas circuit, it comprise there is discharging opening add coating hopper, the described discharging opening adding coating hopper is connected with described main gas circuit via paint valve;
Described control system is connected with described main blow down valve, described upper sand valve, described lower sand valve, described water supply valve, described lower water valve respectively.
2. nuclear power station pipeline inner wall corrosion product cleaning according to claim 1 and coating coating unit, is characterized in that: the rear end of described main gas circuit is connected with pipeline for clearance by rubber tube.
3. nuclear power station pipeline inner wall corrosion product cleaning according to claim 1 and coating coating unit, it is characterized in that: described air supply system comprises the compression gas tank with air inlet and gas outlet, the air inlet of described compression gas tank is connected with compressed gas source, and the gas outlet of described compression gas tank is connected with described main gas circuit.
4. nuclear power station pipeline inner wall corrosion product cleaning according to claim 1 and coating coating unit, it is characterized in that: the described sand system that adds also comprises and adds sand hopper, described add sand hopper by described upper sand valve be connected to described add sand tank add sand mouth.
5. nuclear power station pipeline inner wall corrosion product cleaning according to claim 1 and coating coating unit, it is characterized in that: described water-adding system also comprises watered cup, described watered cup is connected to the described filler adding water pot by described water supply valve.
6. nuclear power station pipeline inner wall corrosion product cleaning according to claim 1 and coating coating unit, it is characterized in that: described sand return-air path is connected with described main gas circuit respectively with described water return-air path, described sand return-air path is provided with the sand return-air valve controlled by described control system, described water return-air path is provided with the water return-air valve controlled by described control system.
7. nuclear power station pipeline inner wall corrosion product according to claim 1 cleaning and coating coating unit, is characterized in that: described control system comprises PLC, the interactive device be connected with described PLC, the power supply of powering for described PLC and described interactive device.
8. nuclear power station pipeline inner wall corrosion product cleaning according to claim 1 and coating coating unit, is characterized in that: the sinking angle of the sinking section in described main gas circuit is 45 °.
9. nuclear power station pipeline inner wall corrosion product cleaning according to claim 1 and coating coating unit, it is characterized in that: the both sides of described main blow down valve are connected with bypass gas circuit, described bypass gas circuit is provided with the by-passing valve controlled by described control system.
10. nuclear power station pipeline inner wall corrosion product cleaning according to claim 1 and coating coating unit, it is characterized in that: it also comprises several pressure transmitters, the pressure transmitter described in each is connected with described control system.
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| CN105945014B (en) * | 2016-06-28 | 2018-02-16 | 西安热工研究院有限公司 | A kind of system and method for nuclear power station main steam line steam blowing |
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| CN1327979C (en) * | 2005-02-28 | 2007-07-25 | 王筱均 | Method of rust cleaning, scale removing, film coating and corrosion preventing for large and middle sized pipeline inside wall |
| US20090205675A1 (en) * | 2008-02-18 | 2009-08-20 | Diptabhas Sarkar | Methods and Systems for Using a Laser to Clean Hydrocarbon Transfer Conduits |
| KR100991176B1 (en) * | 2009-11-18 | 2010-11-01 | 제이에이치그린 주식회사 | Air jet for removing deposition pollution oil |
| CN101823065A (en) * | 2010-04-30 | 2010-09-08 | 苏州德华机械设备有限公司 | Device for descaling and derusting for pipeline and coating to form anti-corrosion coat and application method |
| CN202498058U (en) * | 2011-08-29 | 2012-10-24 | 南京谷德埃涤环境科技有限公司 | Active rotational flow pipeline wall descaling and cleaning system |
| CN104148421B (en) * | 2012-12-20 | 2016-03-16 | 江苏图南合金股份有限公司 | Environment friendly and pollution-free cold rolled tube inner surface deoiling method |
| CN103695833A (en) * | 2014-01-07 | 2014-04-02 | 苏州热工研究院有限公司 | Material of wear-resistant anticorrosive coating for sludge incinerator, coating as well as method for preparing coating |
| CN203972417U (en) * | 2014-08-06 | 2014-12-03 | 苏州热工研究院有限公司 | The cleaning of nuclear power station pipeline inner wall corrosion product and coating coating unit |
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Effective date of registration: 20161123 Address after: 215004 West Ring Road, Jiangsu, Suzhou, No. 1788 Patentee after: Suzhou Nuclear Power Research Institute Co., Ltd. Patentee after: China General Nuclear Power Corporation Patentee after: Lingdong Nuclear Power Co., Ltd. Address before: 215004 West Ring Road, Jiangsu, Suzhou, No. 1788 Patentee before: Suzhou Nuclear Power Research Institute Co., Ltd. Patentee before: China General Nuclear Power Corporation |