CN106352395A - Pipeline sealant for heat supply pipe network and sealing method of pipeline sealant - Google Patents
Pipeline sealant for heat supply pipe network and sealing method of pipeline sealant Download PDFInfo
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- CN106352395A CN106352395A CN201510414422.8A CN201510414422A CN106352395A CN 106352395 A CN106352395 A CN 106352395A CN 201510414422 A CN201510414422 A CN 201510414422A CN 106352395 A CN106352395 A CN 106352395A
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Abstract
The invention provides a pipeline sealant and a sealing method for sealing a water leakage pipeline of an urban heat supply network water pipe system. The pipeline sealant for a heat supply pipe network comprises one or more solid particles, the grain diameter of all or part of the solid particles is smaller than or equal to 10 microns, and the solid particles comprise rigid particles. According to the sealing method of the pipeline sealant, the pipeline sealant is dispersed in liquid to form sealing fluid, the sealing fluid is injected into the water leakage pipeline, and then the sealing fluid flows through all leakage points. When the sealing fluid makes contact with the leakage points, the liquid in the sealing fluid starts to leak out, and therefore the sealant is carried to be gathered at the leakage points in the pipeline to seal the leakage points. On other pipeline parts without leakage points, as no water leakage exists, the sealant in the sealing fluid is not gathered, and the sealing fluid continues to circulate forwards with the concentration of the sealing fluid kept unchanged.
Description
Technical field
The present invention relates to a kind of pipeline sealant of heating network and its encapsulating method.
Background technology
Urban housing to the north of Yangtze River in China needed to warm oneself in winter, and was all by the way of central heating mostly.Urban heating system is typically made up of three parts: thermal source, heat supply network and heat user.Heat source is generally referred to as district boiler room.Heat supply network is the pipe network system with feedwater and backwater contacting thermal source and heat user with water pipe.Usually, after thermal source is heated to uniform temperature heat source water, heat source water becomes hot water by heat exchanger the cool water heating in heat supply network, and hot water is just sent to heat user by the water-supply line of heat supply network in the presence of water circulating pump, and heat energy is just carry by water and passes to heat user by the pipeline of heat supply network.The water that temperature has lowered after heat user there releases heat is back to heat exchanger further through return piping, is heated again, then is sent to heat user there.Heat source water can also be heated to form steam to heat hot net water, and have also directly can deliver to heat user steam by pipeline.This circulates in heat pipeline and carries out always, even if being also not less than a setting value with guarantee in the indoor temperature of cold winter interior-heat user.
The pipeline of this heat supply network pipe network system is generally very long, and pipeline total length in a system can reach more than km.This system is also very complicated, has numerous branch lines to lead to numerous heat user.The very long pipeline of the part of this system is the place being difficult to touch such as to be embedded in underground or wall.This pipeline system generally carries many joints, thus forming a lot of seams.For so long and complex system, usually can some pipe joints because sealant is aging, pipeline corrosion etc. lead to seam leak during hot water circuit.In addition, pipeline is likely to because other reason such as line fracture leads to leak.
If it is necessary to constantly give system water supplement, water resource waste can hardly be avoided for system leak.Importantly, the water missed is much all hot water, the water mended but is cold water at the beginning, just can be sent to heat user after needing to be heated to the temperature of hot water in system, this extra heat energy of necessary consuming of making use of momentum.And, in northern China heat supply substantially by burning coal, this just has the extra contaminant capacity bringing because coal-fired.On the contrary, if seepy question can solve, the coal being wasted and water just can be saved, and contaminant capacity also accordingly reduces.It can be seen that, can effectively seal against heat network system leak pipeline is highly significant.
But, because most pipe network water pipeline is to be embedded in underground it is difficult to touch, very big difficulty is sealed with to leak pipeline.It is all with excavating the method that leak source seals again now.This method first has to where judge leak source, excavate the leak source ground judged again, confirm leak source and leakage cause, then change joint again or this depot siding is repaired, or butt joint is tightened again, or first smear sealant at butt joint and the method such as again connect again and keeped in repair.Because being difficult to accurately judge leak source position, usually can not find leak source on the contrary after the ground of buried pipeline excavates, have to bury again, moving to another place and excavate again, till finding leak source.And set of system often leak source has much individual, the water leakage of single leak source less even if finding several leak sources, may also loseing total water leakage and significantly reducing after sealing.In a word, this method, efficiency is very low.Therefore often excavate repairing just for serious leak in practice, and the leak source little to those water leakages, do not process, leak of leaving persistently is carried out.However, China may have the cold north heat supply phase of 1 year five, six months long, total water leakage adds up still very considerable.It is reported that, the heating system in Changchun can be up to for 1 year in leak
1700
Ten thousand tons, the fire coal wasting because of leak is every year up to 100,000,000 yuans.
The present invention is exactly the efficient pipeline sealant and encapsulating method being formed according to this market demand, and the water pipeline dedicated for sealing urban heating system to control leak.The method need not find leak source position, without excavating the ground burying leak source, but inside pipeline can to system the method that disposably sealed of numerous leak sources, and also seal construction can be carried out in the case of normal heat supply.
Content of the invention
For the problems referred to above, it is an object of the invention to provide a kind of pipeline sealant of heating network and its encapsulating method are it is not necessary to look for leak source position, sealing is convenient.
For solving above-mentioned technical problem, the present invention adopts the following technical scheme that
A kind of pipeline sealant of heating network, described sealant includes one or more solid particles, and the particle diameter of all or part of described solid particle is less than or equal to
10
Micron, described solid particle includes rigid particles.
Preferably,
Described solid particle also includes elastic granule.
It is highly preferred that
Described elastic granule includes rubber grain.
Preferably,
Described solid particle also includes flexible particle.
It is highly preferred that
Described flexible particle includes one or more of rubber grain, starch granuless, cellulose, sawdust, wood powder, swelling polymeric particles.
Preferably,
Described solid particle also includes gel material particle.
It is highly preferred that described gel material particle include cement granules and
/
Or Calx granule.
Preferably,
Described solid particle also includes crosslinkable polymer beads.
Preferably, described pipeline sealant also includes suspending agent.
Preferably, described pipeline sealant also includes fiber.
Preferably, described pipeline sealant also includes sponge.
Preferably, the draw ratio of described solid particle is less than or equal to
3
.
Preferably, described solid particle include micron particles and
/
Or nano-scale particle.
Preferably, described solid particle according to size from childhood to being divided into greatly
n
Individual grade,
n
Level mean particle size with
n-1
The ratio of mean particle size of level is
5
:
1~1.2
:
1
, wherein
n=2
,
3
...,
n
.
It is highly preferred that
n
Level solid particle cumulative volume with
n-1
The ratio of particle overall volume of level is
0.3~5
.
Preferably, particle diameter is less than or equal to
10
The solid particle of micron includes one or more of following granule: clay particle, bentonite clay particle, kaolinite granule, illite granule, attapulgite granule, asbestos, sepiolite particle, saponite, montomorillonite granule and rectorite granule, also comprises the modified product of these granules.
Preferably, described rigid particles include one or more of plastic grain, engineering plastics, shell, coal dust, wood powder, cinder, charcoal granule, mineral particle, calcium carbonate granule, marble granule, illite granule, mica particles, dolomite particles, clay particle, kaolinite granule, bentonite clay particle, asbestos, saponite, montomorillonite granule, rectorite granule, attapulgite granule, sepiolite particle, vermiculite granule, wollastonite particles, shell particles, mica particles, quartz sand particle.
A kind of encapsulating method of pipeline sealant as above, described pipeline sealant is scattered in liquid and forms sealing fluid, sealing fluid will be made to flow through each leak source in described sealing fluid injection leak pipeline.
Preferably, described sealing fluid and being more than or equal to the time of contact of arbitrary leak source
5
Second.
Preferably, described sealing fluid is entered in leak pipeline by infusion, and the pressure of described sealing fluid is more than
0.01mpa
And be less than or equal to
3mpa
.
The present invention adopts above scheme, have the characteristics that hydraulic pressure will leak if having the advantage that using leak source, sealing granule is scattered in liquid and forms sealing fluid, it will be made to contact with leak source in sealing fluid injection conduit line again, in the presence of Fluid pressure, the flowing that leak causes will take leak source to form sealing sealing granule.Solid particle can not pass through leak source, and the leak source will being left in pipe is enriched with and defines one layer of accumulation, and the sealing of the leakage point of abutment joint etc. is the formation of.When the sealing in a leak source has completed, just stop in the leak of this leak source, more solid particles also would not be had again to be enriched herein, this will be avoided solid particle enrichment excessive, blocking pipeline.Similarly, there is no other line segments of leak source, because not having leak, the sealant in sealing fluid would not be enriched with, and the concentration of sealing fluid just can keep unchangeably continuing to circulate forward.
Specific embodiment
Below presently preferred embodiments of the present invention is described in detail, so that advantages and features of the invention can be easier to be understood by the person skilled in the art.
A kind of pipeline sealant of the present invention includes following solid particle:
Plastic grain (comprises engineering plastics granule), rubber grain, shell, sawdust, sand, coal dust, wood powder, cinder, charcoal granule, mineral particle, calcium carbonate granule, marble granule, illite granule, mica particles, dolomite particles, clay particle, kaolinite granule, bentonite clay particle, asbestos, saponite, montomorillonite granule, rectorite granule, attapulgite granule, sepiolite particle, vermiculite granule, wollastonite particles, shell particles, mica particles, quartz sand particle, starch granuless, swelling polymeric particles, sponge fiber, cement granules, Calx granule, cross-linking polyacrylamide particle.The particle diameter distribution of at least one above-mentioned solid particle is more than nanoscale.At least one above-mentioned solid particle includes micron particles.
Above-mentioned various solid particle is divided into following a few class:
Rigid particles: a number of rigid particles must be comprised in pipeline sealant, rigid particles are selected from one or more of plastic grain, shell, coal dust, charcoal granule, cinder, mineral particle, calcium carbonate granule, marble granule, illite granule, mica particles, dolomite particles, clay particle, kaolinite granule, bentonite clay particle, asbestos, saponite, montomorillonite granule, rectorite granule, attapulgite granule, sepiolite particle, vermiculite granule, wollastonite particles, shell particles, mica particles, quartz sand particle.
Elastic granule: be further added with the elastic granules such as rubber grain in pipeline sealant, using the elasticity of elastic granule itself, rigid particles can be better adapted to and pile up the hole being formed, form finer and close sealing further.
Flexible particle: flexible particle can also be added in sealant further, using the flexibility of flexible particle itself, rigid particles can be better adapted to and elastic granule piles up the hole being formed, form finer and close sealing further.Flexible particle is selected from one or more of rubber grain, starch granuless, cellulose grain, wood powder, sawdust, swelling polymeric particles.
Gelling material particles: gelling material particles can also be comprised in pipeline sealant further, as cement granules, Calx granule etc., gelling material particles can be by the physics chemical action of itself, during be changed into hard stone shape body from plasticity slurry, other granules bonding can be integrally formed, for improving the intensity that sealing is formed.
Crosslinkable polymer beads: the polymer beads with crosslinked action, such as resin particle, cross-linking polyacrylamide particle etc. can also be comprised in pipeline sealant further, in the presence of its chemical crosslinking, form gel, improve the compactness of sealing.
Above-mentioned various solid particle be shaped as arbitrary shape, but following condition need to be met: draw ratio is usually no more than
3
, preferably exist
1
Arrive
2
Between.
Fiber is further comprised, such as silk, hair etc. in pipeline sealant.
Sponge is further comprised, such as opening sponge etc. in pipeline sealant.
In another embodiment, pipeline sealant is only made up of a kind of substantially uniform solid particle of particle diameter, this solid particle includes one or more of following granule: clay particle, bentonite clay particle, kaolinite granule, illite granule, attapulgite granule, sepiolite particle, asbestos, saponite, montomorillonite granule and rectorite granule, and particle diameter is less than or equal to
10
Micron.This embodiment can further include the modified product of one or more these granules, bentonite clay particle such as organising etc..
In addition to the solid particle of above-mentioned its plugging action various, sealant still further comprises suspending agent.In pipeline sealant dispensing, the density of contained solid particle may be different from the density of the liquid (water, oil) for particle, and suspending agent can make solid particle stably dispersing in a liquid, do not float and also do not precipitate.Suspending agent granule can be selected for suspending agent biopolymer.Clay particle, bentonite clay particle, attapulgite granule, sepiolite particle, asbestos, saponite, montomorillonite granule and rectorite granule etc. inherently have suspension effect.Thus if one or more these have suspension effect granule selected, extra suspending agent is dispensable.
Pipeline sealant includes different size of many kinds of solids granule.As: the particle diameter of the largest solid particle in pipeline sealant is
1
Centimetre, in order to enable the sealing of densification, the smallest particles in pipeline sealant should be the smaller the better.Usually, in pipeline sealant should contain a number of micron order and
/
Or nano-scale particle.But, because the size and shape of leak source cannot be predicted, good pipeline sealant is required to be suitable for sealing different size of leak source simultaneously.Sealing fluid containing big and small many kinds of solids granule needs the function with sealing pipeline different size leak source.So, sealing granule can mutually inlay formation sealing under pressure after leak source enrichment.To more than certain size (such as
10
Micron) solid particle by size from childhood to being in turn divided into greatly
n
Individual grade,
n
Level mean particle size with
n-1
The ratio of mean particle size of level is
5
:
1~1.2
:
1
,
n
Level particle overall volume with
n-1
The ratio of particle overall volume of level is
0.3~5
Again to improve particle studded efficiency, wherein
n=2
,
3
...,
n
.
Comprised the steps: using the method that above-mentioned pipeline sealant is sealed to the pipeline of heating network
Described sealant is scattered in liquid and forms sealing fluid, sealing fluid will be made to flow through each leak source in described sealing fluid injection leak pipeline,
Seal fluid and be more than or equal to the time of contact of arbitrary leak source
5
Second.
Described sealing fluid is entered in leak pipeline by infusion, and the pressure of described sealing fluid is more than
0.01mpa
And be less than or equal to
3mpa
.
Usually, form described sealing fluid in pipeline sealant addition fresh water.In mixing tank, it is initially charged appropriate fresh water, add pipeline sealant, after stirring, be just made into sealing fluid.Sealant can also be added in other liquid (diesel oil, saline, sea water etc.) and be made into sealing fluid.
Sealing fluid is usually pumped in leak pipe network, and will keep certain pump pressure in the construction of sealing, so that sealing fluid is with pressure.Pump can be circulation of fluid pump or other types of pump.Pump pressure typically exists
0.01mpa
Arrive
3mpa
Between, it is desirable that
0.1mpa
Arrive
1mpa
Between.That is, the pressure that sealing fluid is carried is controlled to be more than or equal to
0.01mpa
And be less than or equal to
3mpa
, preferably greater than or equal to
0.1mpa
And be less than or equal to
1mpa
.
The volume of the sealing fluid typically pumping into can be large enough to make whole pipe network be filled with sealing fluid.But it is also possible to pump into the sealing fluid of a smaller size smaller, then pump into water or other fluid again to promote sealing fluid, so that sealing fluid is flow through all possible leak source and be advanced forward by displacement, eventually form a circulation.Circulation can carry out one or many, and in this process, maintains the pressure in pipeline with pump.Need to lentamente be circulated to form firm sealing by the sealing fluid of pump displacement, and have enough amounts to ensure that sealing fluid all reaches the regular hour in flowing through of arbitrary leak source.The amount of sealing fluid typically will make its time contacting with certain leak source exist with flow velocity
5
Second arrives
6
Hour, this time preferably exists
30
Minute arrives
1.5
Hour, in a word it is necessary to make sealing fluid and the time of contact of leak source be no less than
5
Second.Finally sealed fluid can be stayed in pipe network always or discharge from pipe network.
The sealing principle of the present invention is as follows: first the sealant containing different-grain diameter size particles is scattered in liquid (usually fresh water) and is made into sealing fluid, again sealing fluid is pumped in leak pipe network, then advance sealing fluid to circulate in leak pipe network at least one week along pipeline, to have an opportunity to contact with leak sources numerous in pipe network again with pump.When sealing fluid and touching leakage point, the liquid in sealing fluid will start to spill so that sealant in a liquid be carried in pipe leak source directly over be enriched with, and immediately sealing is formed to leak source.After sealing is formed, particle rich namely stopping, will not continue to be enriched with or even block pipeline.There is no other line segments of leak source, because not having leakage, the sealant in sealing fluid also will not be enriched with, and the concentration of sealing fluid is maintained for unchangeably continuing to circulate forward, finally remaining sealing fluid can be recycled.The sealing fluid looping back can emit.The sealant of the method can once in pipe to formed through all leak sources and seal, such that it is able to avoid must first determining in traditional encapsulating method that leak source excavates the trouble that ground to seal again, thus in hgher efficiency.
Above-described embodiment only technology design to illustrate the invention and feature, its object is to person skilled in the art and will appreciate that present disclosure and implement according to this, can not limit protection scope of the present invention with this.Equivalent transformation or modification that all spirit according to the present invention are made, all should be included within the scope of the present invention.
Claims (20)
1. a kind of heating network pipeline sealant it is characterised in that: described sealant includes one or more solid particles, and the particle diameter of all or part of described solid particle is less than or equal to 10 microns, and described solid particle includes rigid particles.
2. pipeline sealant according to claim 1 it is characterised in that: described solid particle also includes elastic granule.
3. pipeline sealant according to claim 2 it is characterised in that: described elastic granule includes rubber grain.
4. pipeline sealant according to claim 1 it is characterised in that: described solid particle also includes flexible particle.
5. pipeline sealant according to claim 4 it is characterised in that: described flexible particle be selected from one or more of rubber grain, starch granuless, sawdust, wood powder, cellulose grain, swelling polymeric particles.
6. pipeline sealant according to claim 1 it is characterised in that: described solid particle also includes gel material particle.
7. pipeline sealant according to claim 6 it is characterised in that: described gel material particle includes cement granules and/or Calx granule.
8. pipeline sealant according to claim 1 it is characterised in that: described solid particle also includes crosslinkable polymer beads.
9. pipeline sealant according to claim 1 it is characterised in that: described pipeline sealant also includes suspending agent.
10. pipeline sealant according to claim 1 it is characterised in that: described pipeline sealant also includes fiber.
11. pipeline sealants according to claim 1 it is characterised in that: described pipeline sealant also includes sponge.
12. pipeline sealants according to claim 1 it is characterised in that: the draw ratio of described solid particle be less than or equal to 3.
13. pipeline sealants according to claim 1 it is characterised in that: described solid particle includes micron particles and/or nano-scale particle.
14. pipeline sealants according to claim 1 it is characterised in that: according to size from childhood to being divided into greatly n grade, the mean particle size of n level is 5:1 ~ 1.2:1 with the ratio of the mean particle size of n-1 level to described solid particle, wherein n=2,3 ..., n.
15. pipeline sealants according to claim 14 it is characterised in that: the solid particle cumulative volume of n level and the ratio of the particle overall volume of n-1 level are 0.3 ~ 5.
16. pipeline sealants according to claim 1 it is characterised in that: particle diameter be less than or equal to 10 microns solid particle clay particle, bentonite clay particle, kaolinite granule, illite granule, attapulgite granule, sepiolite particle, saponite, montomorillonite granule, one or more of rectorite granule.
17. pipeline sealants according to claim 1 it is characterised in that: described rigid particles include one or more of plastic grain, shell, coal dust, wood powder, cinder, charcoal granule, mineral particle, calcium carbonate granule, marble granule, illite granule, mica particles, dolomite particles, clay particle, kaolinite granule, bentonite clay particle, montomorillonite granule, rectorite granule, saponite, asbestos, attapulgite granule, sepiolite particle, vermiculite granule, wollastonite particles, shell particles, mica particles, quartz sand particle.
The encapsulating method of the pipeline sealant as described in a kind of 18. any one as claim 1-17 it is characterised in that: described pipeline sealant is scattered in liquid and forms sealing fluid, sealing fluid will be made to flow through each leak source in described sealing fluid injection leak pipeline.
19. encapsulating methods according to claim 18 it is characterised in that: the time of contact of described sealing fluid and arbitrary leak source is more than or equal to 5 seconds.
20. encapsulating methods according to claim 18 it is characterised in that: described sealing fluid enters in leak pipeline by infusion, and the pressure of described sealing fluid is more than 0.01mpa and less than or equal to 3mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510414422.8A CN106352395A (en) | 2015-07-15 | 2015-07-15 | Pipeline sealant for heat supply pipe network and sealing method of pipeline sealant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510414422.8A CN106352395A (en) | 2015-07-15 | 2015-07-15 | Pipeline sealant for heat supply pipe network and sealing method of pipeline sealant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106352395A true CN106352395A (en) | 2017-01-25 |
Family
ID=57842593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510414422.8A Pending CN106352395A (en) | 2015-07-15 | 2015-07-15 | Pipeline sealant for heat supply pipe network and sealing method of pipeline sealant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110003853A (en) * | 2019-04-28 | 2019-07-12 | 祝亚琴 | Efficient sealing agent |
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| US20120067447A1 (en) * | 2009-04-16 | 2012-03-22 | Nicholas John Ryan | Delivery method and compositions |
| CN103965847A (en) * | 2013-01-30 | 2014-08-06 | 中国石油天然气股份有限公司 | Solidifiable anti-leakage sealing and plugging agent |
| CN104232039A (en) * | 2014-09-22 | 2014-12-24 | 中国石油天然气股份有限公司 | Multi-element synergic plugging agent and application thereof |
| CN104676190A (en) * | 2013-11-28 | 2015-06-03 | 中国石油化工股份有限公司 | Leakage point blocking device for inner wall of pipeline |
-
2015
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20120067447A1 (en) * | 2009-04-16 | 2012-03-22 | Nicholas John Ryan | Delivery method and compositions |
| CN101880413A (en) * | 2010-05-24 | 2010-11-10 | 大连理工大学 | Sealant for high temperature pressurized leakage stop-up |
| CN103965847A (en) * | 2013-01-30 | 2014-08-06 | 中国石油天然气股份有限公司 | Solidifiable anti-leakage sealing and plugging agent |
| CN104676190A (en) * | 2013-11-28 | 2015-06-03 | 中国石油化工股份有限公司 | Leakage point blocking device for inner wall of pipeline |
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