CN104031608A - Sealing agent for high-temperature pressure plugging and preparation method thereof - Google Patents
Sealing agent for high-temperature pressure plugging and preparation method thereof Download PDFInfo
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- CN104031608A CN104031608A CN201410247633.2A CN201410247633A CN104031608A CN 104031608 A CN104031608 A CN 104031608A CN 201410247633 A CN201410247633 A CN 201410247633A CN 104031608 A CN104031608 A CN 104031608A
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Abstract
The invention discloses a sealing agent for high-temperature pressure plugging. The sealing agent comprises the following components in percentage by weight: 10-30% of base material, 15-25% of curing agent, 10-15% of retarder, 15-20% of packing and 10-15% of tackifier, wherein the base material is a mixture of phosphate and silicate; the curing agent is one or more of zinc oxide, aluminum oxide, copper oxide and magnesium oxide; the retarder is one or more of organic polymers which are resistant to high temperature greater than 250 DEG C. The invention further discloses a preparation method of the sealing agent for high-temperature pressure plugging. As the sealing agent for high-temperature pressure plugging, which is disclosed by the invention, adopts the phosphate and the silicate which are resistant to high temperature as the base material of the sealing agent, compared with an organic plugging sealing agent, the sealing agent has the characteristics of fast curing speed, high strength, good sealing capability and the like, and can be used for unstopped pressure plugging of high-temperature mediums such as overheated steam, high-temperature hydrocarbon and flue gases in the petrochemical industry, the petroleum refining industry, the thermal power generation industry, the metal smelting industry and the like.
Description
Technical field
The application relates to pressurized vessel field, specifically a kind of for the continuous production device sealant for high temperature pressurized leakage stop-up that do not stop.
Background technology
Pipeline and container leak because the reasons such as material and welding quality, artificial destruction, inside and outside corrosion there will be perforation often.Leaking the moment is threatening oil and gas pipes normally to move, and is recurrent problem in the factory of each industrial sector and engineering, particularly outstanding in oil refining, chemical industry and petroleum chemical plant and gas pipe line especially.Pressure sealing, the leak stopping of not stopping, refers to after the dielectric leakage in production system, the seal operation of carrying out in the situation that need not stopping and reduce working pressure and temperature.In chemical process, the leakage of various media is common, particularly petrochemical enterprise, production system is all moved under High Temperature High Pressure, the medium of contact or inflammable and explosive, or burn into is poisonous, the leakage of medium gently wastes energy, contaminate environment, impact is carried out production strictly in line with rules and regulations, heavy jeopardize personnel safety and cause a serious accident, in the past, the leakage of medium, is usually parking maintenance, makes giant's financial loss.
Traditional emergency repair method of pipe leakage is general following several in addition except replace tubes: repair welding method, steel band method, gluing connection, fixture injecting glue method.Fixture injecting glue method is utilized the appearance of leakage position and the sealed cavity that fixture forms, inject and be full of sealed cavity, stop leaking of medium, thereby stop a leak, this kind of blocking method, simple and efficient, easily grasp, be not only applicable to straight pipeline, and be applicable to the positions such as weld bond, threeway, elbow, reducing, valve interface, ring flange, ring flange root, container tank connecting tube root, ensure the normal operation of pipeline, and the effect that can play permanent leak stopping and strengthen.Fixture injecting glue method is because the advantageous properties such as it has without getting angry, high temperature resistant, high pressure are extensively met the tendency.Conventional pressure sealing sealing agent mainly contains two kinds at present, and one is organic leakage blocking sealants, taking the macromolecular material such as synthetic rubber and synthetic resins as basis, adds appropriate filler and auxiliary agent, becomes through mechanically mixing face.Though can be used for the pressure sealing that do not stop of steam, water, wet goods medium, be subject to the impact of macromolecular material Degradation Characteristics, its use temperature is no more than 400 DEG C.Another kind is the ceramic adhesive after solidifying, and it can resistance to more than 1200 DEG C high temperature, is applicable to cermet material sealing, bonding, leak stopping, and this ceramic adhesive needs now with the current, is not suitable for pressure sealing.
Summary of the invention
The application's object is to provide inorganic type pressure sealing sealing agent of a kind of ability 200-900 DEG C high temperature and preparation method thereof.
In order to solve the problems of the technologies described above, the application is achieved through the following technical solutions:
A kind of sealant for high temperature pressurized leakage stop-up, by weight percentage, it consists of: body material 10-30%, solidifying agent 15-25%, retardant 10-15%, filler 15-20%, tackifier 10-15%; Wherein body material is the mixture of phosphoric acid salt and silicate; Solidifying agent be zinc oxide, aluminum oxide, cupric oxide, magnesian one or more; Retardant is the organic polymer of resistance to more than 250 DEG C high temperature, is one or more.
The application's phosphoric acid salt and silicate composition part by weight are phosphoric acid salt: silicate 1:4-1:2.
Described in the application, solidifying agent is cupric oxide, and cupric oxide powder must have certain purity, and foreign matter content will lack.
Described in the application, retardant is polyphenylene sulfide.
Described in the application, tackifier are fluid rubber.
Described in the application, tackifier are hydroxyl terminated butyl nitrile (HTBN) rubber.
A compound method for sealant for high temperature pressurized leakage stop-up described in the application, comprises the following steps:
The first step, adds in kneader and mixes after by formula, phosphoric acid salt and silicate being weighed up;
Second step, successively by filler, solidifying agent, retardant, tackifier join in the kneader in the first step;
The 3rd step, the mixture that second step is obtained vacuumizes while stirring, and approximately 30-60 minutes, after mixing, pack in airtight plastics bag, under room temperature, place 48-72 hours;
The 4th step, the mixture mould that the 3rd step is obtained is squeezed into cylindric, and sealing is stored in shady and cool dry place.
The application adopts technique scheme, and compared with prior art tool has the following advantages:
The application's high temp. pressuriced leakage blocking sealing agent is owing to selecting resistant to elevated temperatures phosphoric acid salt and silicate to make sealing agent body material, and compared with organic type leakage blocking sealants, raw material sources are wide, complete processing is simple, and cost is low, pollution-free.
The application's high temp. pressuriced leakage blocking sealing agent, implements pressure sealing to the pipeline of 200-900 DEG C, has the features such as curing speed is fast, intensity is high, good airproof performance.Can be used for the pressure sealing that do not stop of the high-temperature mediums such as the superheated vapour, high temperature, hydrocarbon, stack gas of the industries such as petrochemical complex, refining of petroleum, thermal power generation, Metal smelting.
Embodiment
Below in conjunction with embodiment, the application's technical scheme is elaborated:
A kind of sealant for high temperature pressurized leakage stop-up, by weight percentage, it consists of: body material 10-30%, solidifying agent 15-25%, retardant 10-15%, filler 15-20%, tackifier 10-15%.
The application's sealing agent, Main Function mechanism is that curing reaction at high temperature occurs for body material and solidifying agent, generates the very high chain molecule of intensity, and resistant to elevated temperatures mineral filler is wrapped in wherein, form hard cured body, with the object of the pressure sealing that reaches a high temperature.
In the application, body material can be the mixture of phosphoric acid salt and silicate, and its weight proportion, according to the height adjustment of medium temperature, is preferably phosphoric acid salt: silicate=1:4-1:2.Phosphoric acid salt has the advantages such as nontoxic, tasteless, nuisanceless and good high-temperature behavior and comes into one's own as a kind of novel inorganic tackiness agent.Compared with silicate adhesive, its water tolerance is better, cure shrinkage is little, hot strength is high.
Described in the application, solidifying agent is metal oxide, can be one or more, can be zinc oxide, aluminium sesquioxide, cupric oxide, magnesium oxide etc., preferably cupric oxide.If want temperature tolerance further to improve, in test afterwards, can select solidifying agent is one or more of high purity aluminium oxide, zirconium white etc., heatproof can be brought up to 1200 DEG C of left and right.
Described in the application, retardant is the organic polymer of resistance to more than 250 DEG C high temperature, is preferably organic heterocyclic polymkeric substance, can be one or more, as being polyimide, and polybenzimidazole, polyphenylene sulfide etc., in the application, preferably retardant material is polyphenylene sulfide.
The organic polymer that retardant in the application's sealant for high temperature pressurized leakage stop-up is selected, ensure just to decompose at higher temperature, the effect of asking when playing retardation of curing, user's force can adopt the method for the unrestrained stain of high-temperature fusion, retardant is coated on to solidifying agent surface, postpones the curing reaction of sealing agent; Filler can reduce sealant cures shrinking percentage, improve sealing agent intensity and thermotolerance, filler in the application can adopt common, the filler that sealing agent is general, as graphite, asbestos, carbon fiber, glass fibre etc., wherein the Main Function of asbestos, carbon fiber, glass fibre is to improve intensity and thermotolerance, graphite mainly plays filling effect, reduces the cure shrinkage of sealing agent; The Main Function of tackifier is the viscosity that increases sealing agent, improves the formability of sealing agent, and the application's tackifier can adopt general organic adhesion agent, as fluid rubber, epoxy resin, resol etc., can be one or more.In fluid rubber, can be liquid nbr, liquid butadiene-styrene rubber, hydroxyl terminated butyl nitrile (HTBN) glue etc., preferably hydroxyl terminated butyl nitrile (HTBN) glue.
The preparation method of the application's sealant for high temperature pressurized leakage stop-up, can adopt common mechanically mixing method, after mechanically mixing, seals by mould extrusion molding again, is beneficial to preserve.The high temperature leakage blocking sealants of making can be implemented pressure sealing to media such as high-temperature steam, high temperature, hydrocarbon, stack gases, and its heat resistance can reach 900 DEG C.
The application's high temp. pressuriced leakage blocking sealing agent can be prepared by following steps, but is not limited to this method, and the application provides preferably embodiment of one:
The first step, adds in kneader and mixes after by formula, phosphoric acid salt and silicate being weighed up;
Second step, successively by filler, solidifying agent, retardant, tackifier join in the kneader in the first step;
The 3rd step, the mixture that second step is obtained vacuumizes while stirring, and approximately 30-60 minutes, after mixing, pack in airtight plastics bag, under room temperature, park 48-72 hours;
The 4th step, the mixture mould that the 3rd step is obtained is squeezed into cylindric, and sealing is stored in shady and cool dry place.
Sealing agent described in the application can be used for being exclusively used in the glue rifle of high temp. pressuriced leakage blocking, adopts the mode of high-pressure injection to implement pressure sealing to media such as 200-900 DEG C of high-temperature steam, high temperature, hydrocarbon and stack gases.
When concrete operations, adopt high-strength steel design and produce unit clamp and be installed on leaker in leak, the application's who produces by above method high temp. pressuriced leakage blocking sealing agent is expelled in flange gap with high-pressure injection plastic rifle, sealing agent solidifies as a whole very soon, has blocked leakage.
To utilizing the sealing agent that the method for the invention obtains to carry out heatproof test, as follows:
By the chamber type electric resistance furnace energising of 2500 watts, make its temperature reach 900 DEG C of left and right, be incubated after 10 minutes, get 20 grams of sealing agents of the present invention, be placed in resistance furnace, the organic additive in sealing agent burns very soon, and remaining composition is cured as a hard agglomerate under high temperature action, weigh approximately 13 grams, illustrate that thus the heat resistance of sealing agent can reach 900 DEG C.
Claims (7)
1. a sealant for high temperature pressurized leakage stop-up, is characterized in that, by weight percentage, it consists of: body material 10-30%, solidifying agent 15-25%, retardant 10-15%, filler 15-20%, tackifier 10-15%; Wherein body material is the mixture of phosphoric acid salt and silicate; Solidifying agent be zinc oxide, aluminum oxide, cupric oxide, magnesian one or more; Retardant is one or more of organic polymer of resistance to more than 250 DEG C high temperature.
2. sealant for high temperature pressurized leakage stop-up according to claim 1, is characterized in that: phosphoric acid salt and silicate composition part by weight are phosphoric acid salt: silicate 1:2-4.
3. sealant for high temperature pressurized leakage stop-up according to claim 1, is characterized in that: solidifying agent is cupric oxide.
4. sealant for high temperature pressurized leakage stop-up according to claim 1, is characterized in that: retardant is polyphenylene sulfide.
5. sealant for high temperature pressurized leakage stop-up according to claim 1, is characterized in that: tackifier are fluid rubber.
6. sealant for high temperature pressurized leakage stop-up according to claim 1, is characterized in that: tackifier are hydroxyl terminated butyl nitrile (HTBN) rubber.
7. a compound method for sealant for high temperature pressurized leakage stop-up claimed in claim 1, is characterized in that: comprise the following steps:
The first step, adds in kneader and mixes after by formula, phosphoric acid salt and silicate being weighed up;
Second step, successively by filler, solidifying agent, retardant, tackifier join in the kneader in the first step;
The 3rd step, the mixture that second step is obtained vacuumizes while stirring, and approximately 30-60 minutes, after mixing, pack in airtight plastics bag, under room temperature, park 48-72 hours;
The 4th step, the mixture mould that the 3rd step is obtained is squeezed into cylindric, is stored in shady and cool dry place after sealing under normal temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410247633.2A CN104031608A (en) | 2014-06-06 | 2014-06-06 | Sealing agent for high-temperature pressure plugging and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410247633.2A CN104031608A (en) | 2014-06-06 | 2014-06-06 | Sealing agent for high-temperature pressure plugging and preparation method thereof |
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| CN104031608A true CN104031608A (en) | 2014-09-10 |
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| CN201410247633.2A Withdrawn CN104031608A (en) | 2014-06-06 | 2014-06-06 | Sealing agent for high-temperature pressure plugging and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104449563A (en) * | 2014-10-29 | 2015-03-25 | 无锡乐华自动化科技有限公司 | Sealant for blocking leakage under pressure |
| CN104653236A (en) * | 2015-01-14 | 2015-05-27 | 陕西万方节能科技股份有限公司 | Vacuum system holding method for thermal power plant |
| CN116769400A (en) * | 2023-05-19 | 2023-09-19 | 广州力盾环保工程有限公司 | Plugging material for dry suction tower flue gas pipeline and plugging method thereof |
| CN116769400B (en) * | 2023-05-19 | 2024-04-19 | 广州力盾环保工程有限公司 | Plugging material for dry suction tower flue gas pipeline and plugging method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1427060A (en) * | 2001-12-17 | 2003-07-02 | 中国石油天然气集团公司 | Sealing agent used for high temp. pressuriced leakage blocking and its use method |
| CN1434093A (en) * | 2003-01-28 | 2003-08-06 | 刘玉军 | Quick leakage-stopping agent |
| CN101405335A (en) * | 2006-01-20 | 2009-04-08 | 莫门蒂夫性能材料股份有限公司 | Sealant composition containing inorganic-organic nanocomposite filler |
-
2014
- 2014-06-06 CN CN201410247633.2A patent/CN104031608A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1427060A (en) * | 2001-12-17 | 2003-07-02 | 中国石油天然气集团公司 | Sealing agent used for high temp. pressuriced leakage blocking and its use method |
| CN1434093A (en) * | 2003-01-28 | 2003-08-06 | 刘玉军 | Quick leakage-stopping agent |
| CN101405335A (en) * | 2006-01-20 | 2009-04-08 | 莫门蒂夫性能材料股份有限公司 | Sealant composition containing inorganic-organic nanocomposite filler |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104449563A (en) * | 2014-10-29 | 2015-03-25 | 无锡乐华自动化科技有限公司 | Sealant for blocking leakage under pressure |
| CN104653236A (en) * | 2015-01-14 | 2015-05-27 | 陕西万方节能科技股份有限公司 | Vacuum system holding method for thermal power plant |
| CN116769400A (en) * | 2023-05-19 | 2023-09-19 | 广州力盾环保工程有限公司 | Plugging material for dry suction tower flue gas pipeline and plugging method thereof |
| CN116769400B (en) * | 2023-05-19 | 2024-04-19 | 广州力盾环保工程有限公司 | Plugging material for dry suction tower flue gas pipeline and plugging method thereof |
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Application publication date: 20140910 |