CN102942700A - Preparation technology of modified asphalt by adding stabilizer at later stage - Google Patents
Preparation technology of modified asphalt by adding stabilizer at later stage Download PDFInfo
- Publication number
- CN102942700A CN102942700A CN2012104230893A CN201210423089A CN102942700A CN 102942700 A CN102942700 A CN 102942700A CN 2012104230893 A CN2012104230893 A CN 2012104230893A CN 201210423089 A CN201210423089 A CN 201210423089A CN 102942700 A CN102942700 A CN 102942700A
- Authority
- CN
- China
- Prior art keywords
- matrix pitch
- stablizer
- modifying asphalt
- preparation technology
- later stage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a preparation technology of a modified asphalt by adding a stabilizer at later stage, characterized by dividing heated molten matrix asphalt into two parts, wherein most matrix asphalt is used as the matrix asphalt added at earlier stage, and a small part of the matrix asphalt is used as the matrix asphalt added at later stage; then adding a modifier, a compatilizer and the matrix asphalt added at earlier stage in a mixing tank to uniformly mix to obtain a swelling system, processing the swelling system by using a colloid mill, then sending the processed swelling system into the tank to stir for developing; after the swelling reaction of the matrix asphalt added at earlier stage and the modifier is stable, adding the matrix asphalt added at later stage and the stabilizer, continuing to stir to develop to obtain the modified asphalt. According to the invention, there is no false liquid level occurred in the mixing tank during the production process, there is no local sharp reaction occurred, there is no block that is difficult to be molten, thus the production efficiency is better than existing technology of synchronous adding agents, and the quality of the modified asphalt is good.
Description
Technical field
The present invention relates to a kind of preparation technology of the modifying asphalt at rear interpolation stablizer.
Background technology
Modifying asphalt is to be formed through being mixed with by the component that comprises matrix pitch, properties-correcting agent, compatilizer and stablizer.The production of present modifying asphalt is to adopt to add synchronously agent technique, the production process of this technique is: heat-conducting oil furnace is exported oil temperature rise to 220 ℃, be heated to 200 ± 5 ℃ Deng matrix pitch, set the frequency that feeds intake of properties-correcting agent, compatilizer and stablizer, and the charging frequency of matrix pitch and the liquid level of mixing tank.Then, change logical matrix pitch and advance the products pot flow process, with matrix pitch, properties-correcting agent, compatilizer and stablizer by prescription add simultaneously mix in the mixing tank after, squeeze into finished pot through colloidal mill and carry out pitch and grow.Treat to feed intake by production task and finish, pitch is grown qualified rear product export in the finished pot.
But, in actual production, add synchronously the more problems that agent technique exists, main manifestations is: the control of (1) mixing tank circle position is unstable: because the mixing tank liquid level is automatically control, properties-correcting agent and stablizer and matrix pitch react huge strong when adding agent synchronously, form one by one little agglomerate, under the effect of stirrer, these little agglomerates can be attached on the liquidometer, cause falsity water level to occur.Matrix pitch is to carry out charging according to level condition, in case falsity water level occurs, will cause the interpolation of interrupting matrix pitch, and properties-correcting agent and stablizer also add continuing, and can cause like this materials from bonding, causes producing discontinuous, and stifled mill risk is arranged at any time; It is larger that the temperature of (2) producing is crossed low asphalt viscosity, and add the agent excessive velocities, in the situation that stir, the pump circulation do not open and stirs bad, modifying asphalt generation local reaction forms the agglomerate that is difficult to melting, directly affects the modifying asphalt quality.Cause modified bitumen product second-rate, main manifestations is: softening temperature is low, ductility is low, viscosity is large.(3) after modifying asphalt enters products pot, need to start at least two group stirrers and stir, energy consumption is larger.(4) owing to being to add synchronously agent, properties-correcting agent, stablizer and compatilizer have increased the viscosity of mixture with after pitch mixes, these mixtures are along with the carrying out of production process, can remain in above the liquidometer, and can not take away with pitch, can make like this liquidometer falsity water level of appearing.(5) stablizer is powdery, adds moment at stablizer, with pitch generation vigorous reaction, causes in the process of blanking with in the stirrer stirring " flying upward " situation to occur.
Summary of the invention
The preparation technology who the purpose of this invention is to provide a kind of modifying asphalt at rear interpolation stablizer, this technique the falsity water level phenomenon can not occur in the mixing tank in process of production, local vigorous reaction can not occur, do not form the agglomerate that is difficult to melting, production efficiency is better than existingly adding synchronously agent technique, and the modifying asphalt quality is good.
The objective of the invention is to realize by following technical measures: a kind of preparation technology of the modifying asphalt at rear interpolation stablizer, the matrix pitch of heating and melting is divided into two portions, the matrix pitch that most of matrix pitch was wherein thrown in as early stage, the matrix pitch that the small portion matrix pitch was thrown in as the later stage, then with properties-correcting agent, be mixed in the matrix pitch adding mixing tank of throwing in compatilizer and early stage and melt swollen system, the described system of expanding of melting is sent into stirring growth in the products pot after milling treatment of colloid, after the matrix pitch of throwing in until early stage and properties-correcting agent melt swollen reacting balance, the matrix pitch that adds the input of stablizer and later stage continues to stir growth and obtains modifying asphalt.
In the preparation of modifying asphalt, matrix pitch and properties-correcting agent mixed occurrence melt swollen reaction formation and melt swollen system, compatilizer then can improve the stability of the combination between matrix pitch and properties-correcting agent, the chemical stabilization reaction can occur in stabilizer and matrix pitch and properties-correcting agent, to improve the modified effect of pitch.Do not have chemical reaction to occur between matrix pitch and the properties-correcting agent, it melts swollen reaction is pure physical process, melts the viscosity less of swollen system, is conducive to stir, and system easily is uniformly dispersed, and also is conducive to melting of properties-correcting agent swollen.Therefore, matrix pitch and properties-correcting agent mix melt swollen during, even if device or agitation cycle equipment break down, can not cause too large impact to follow-up yet, after fault solves, still can make matrix pitch and properties-correcting agent obtain good dispersion effect.As seen, can adopt in theory matrix pitch, properties-correcting agent and compatilizer to mix to melt swollenly to add again the explained hereafter modifying asphalt of stablizer after steadily, and can solve and add synchronously the problem that agent technique exists.But the contriver finds in the actual production operation, when adding stablizer in the swollen system of melting of matrix pitch and properties-correcting agent, a large amount of cakings can occur on the mixture surface, and tank boil-overs occurs soon, can not reach the modification purpose on the contrary.Trace it to its cause, that properties-correcting agent is when mixing with matrix pitch, properties-correcting agent absorbs light constituent in the pitch and melts swollenly when certain temperature, mixture viscosity is increased, and adds afterwards stablizer, because stablizer and matrix pitch reaction are very violent, stablizer and matrix pitch point of contact can form blister, if add the stablizer excessive velocities or feed intake inhomogeneously, the part can cause reaction to overrun, and the mixing tank volume is less, tank boil-overs just easily occurs and form caking at the mixture outside surface.In addition, because stablizer is powdery, if directly input easily causes dust from flying, and stablizer also should not stir in mixture, thereby matrix pitch is divided into two portions adds, mix with properties-correcting agent first to melt with most of matrix pitch early stage and expand to steady, later stage is with the carrier of remaining matrix pitch as stablizer, add in the mixture with stablizer, can allow stablizer and mixture fully mix, avoid the problem of the too fast tank boil-overs that causes of local reaction and caking.
Among the present invention, take the total mass of modifying asphalt as benchmark, described properties-correcting agent addition is 3.5 ~ 5%, and described stablizer addition is 0.1 ~ 0.3%, and described compatilizer addition is 0 ~ 1%.
Among the present invention, the ratio between the matrix pitch of the matrix pitch that throw in described early stage and later stage input is 3:1 ~ 9:1, is preferably 3:1 ~ 6:1, and the best is 3:1 ~ 5:1.
As a kind of improvement of the present invention: control described later stage matrix pitch and add flow velocity in 35 ~ 40 tons of/hour scopes, the input frequency of described stablizer is in 15Hz ~ 20Hz scope.The flow velocity of control later stage matrix pitch and the input frequency of stablizer in this scheme, stablizer is evenly distributed in the later stage matrix pitch, and then stablizer can fully be mixed with mixture, further avoid the problem of the too fast tank boil-overs that causes of local reaction and caking.
Among the present invention, development time is more than 8 hours behind the matrix pitch of adding stablizer and later stage input, and preferred development time is 8 ~ 24 hours, more preferably, is 8 ~ 12 hours.
The present invention can also do following improvement: the input frequency 25Hz ~ 28Hz of described properties-correcting agent, compatilizer per hour press 0.5 ~ 2 ton speed and throw in, matrix pitch charging in early stage frequency 28 ~ 35Hz.
Among the present invention, described stablizer described early stage matrix pitch and properties-correcting agent grow and add after melting swollen 4 ~ 5 hours.
Adopt colloidal mill to come mixture is ground among the present invention, in operation, should control the colloidal mill temperature out in 190 ~ 205 ℃ of scopes, be preferably 190 ~ 200 ℃, both can satisfy the properties-correcting agent melting, can accelerate matrix pitch again and properties-correcting agent reacts, make once grinding technology can satisfy the modifying asphalt quality index, and can guarantee performance of modified bitumen.
Among the present invention, control the developmental temperature of described products pot in 185 ~ 200 ℃ of scopes, be preferably 190 ~ 200 ℃.
Not restriction of matrix pitch, properties-correcting agent, compatilizer and stablizer to relating among the present invention, technique provided by the invention can be used for the modification of any pitch, and can reach the excellent modification purpose of expection, meet I-D polymer modified asphalt technical requirements (JTG F40-2004).Therefore, described matrix pitch is various pitches, comprises road bitumen, the heavy contaminated product of Sha Zhongsha, Sha Zhongyi heavy contaminated product, Yi Chong Suo Lushi contaminated product or Kuwait's residual oil etc.Described properties-correcting agent is all properties-correcting agent that can be suitable for asphalt modification, comprises high mountain YH791H, Maoming F501 etc.Described compatilizer is all compatilizers that can be suitable for asphalt modification, comprises that subtracting four lines extracts oil out.Described stablizer is all stablizers that can be suitable for asphalt modification, comprises stablizer BHS-2, the BHS-2A of Beijing Shi Keyuan.
The present invention compared with prior art has following unusual effect:
(1) technique of the present invention is reasonable, and in the actually operating, the operation of equipment stationarity significantly improves, and flexibility of operation also is improved.
Matrix pitch is divided into two portions and minute two stages interpolations, the early stage only get properties-correcting agent, compatilizer and most of matrix pitch mix melt swollen, the viscosity of melting swollen system of gained is little, easily disperse, the problems such as falsity water level, stifled mill can not appear in operation, even run into mixing tank and grinding tool fault, after equipment restarts after fixing a breakdown, also can easily make and melt swollen system and be uniformly dispersed.Add again stablizer and remainder matrix pitch after swollen fully melting, and the together interpolation of stablizer and matrix pitch, can avoid stablizer with melt the system of expanding contact the inhomogeneous caking that causes and tank boil-overs.
(2) the modified bitumen product index of gained of the present invention is good: softening temperature is high, ductility is long, modest viscosity, good stability, adds rear 8 hours indices at stablizer and can reach I-D polymer modified asphalt technical requirements (JTG F40-2004).
(3) the present invention fully melts at properties-correcting agent to add stablizer after swollen again and carry out the chemical stabilization reaction, can give full play to the service efficiency of properties-correcting agent and stablizer, not only the time of stabilization also can correspondingly foreshorten to 8 ~ 12 hours, enhance productivity, but also can reduce properties-correcting agent and stablizer consumption, be conducive to reduce cost.
Description of drawings
Fig. 1 is process flow sheet provided by the invention.
Embodiment
Set forth in further detail by the following examples content of the present invention, but following embodiment just is used for content of the present invention is set forth, rather than restriction, therefore in the implication suitable with claims of the present invention and any change in the scope, all should think to be included in the scope of claims.
Adopt U.S. Dao Weisi modifying asphalt suite of equipment in following examples, approximately 25 tons/hour of production rate.The temperature of heat conducting furnace outlet oil is risen to 220 ℃, the temperature for the treatment of matrix pitch is heated to 200 ± 5 ℃, matrix pitch is divided into two portions, the matrix pitch that most of matrix pitch was wherein thrown in as early stage, the matrix pitch that remaining matrix pitch was thrown in as the later stage, wherein, the matrix pitch that throw in early stage, properties-correcting agent and compatilizer add in the mixing tank by prescription, be mixed into and melt swollen system, the frequency that feeds intake of properties-correcting agent is 25Hz ~ 28Hz, phase solvent is by per hour 1 ton (1T/h) input, and the charging frequency of the matrix pitch that throw in early stage is that 28Hz ~ 35Hz and mixing tank liquid level are 50% ~ 57%.Melt swollen system and after milling treatment of colloid, squeeze in the products pot 190～205 ℃ of colloidal mill temperature outs, 185～200 ℃ of products pot developmental temperatures.Treat that the stirrer of opening the product tank skin when products pot liquid level reaches 1.2 meters stirs, behind the properties-correcting agent and compatilizer in adding prescription, melt swollen system and in products pot, stir growth after 4 ~ 5 hours, melt in the swollen system and add stablizer and remaining matrix pitch, the matrix pitch charging flow velocity that later stage throws in is 35 ~ 40 tons/hour (T/h), the input frequency of stablizer is 15 ~ 20Hz, after mixing, grows in products pot and dispatches from the factory after qualified.
The matrix pitch that following examples adopt is road bitumen AH-70,70B, and properties-correcting agent adopts high mountain YH791H or Maoming F501, and compatilizer adopts and subtracts four lines extraction oil, and stablizer adopts BHS-2A or BHS-2.
Table 1: embodiments of the invention processing parameter
Table 2: the performance analysis data of modifying asphalt of the present invention
Table 3: Comparative Examples processing parameter
Table 4: the performance analysis data of the modifying asphalt of Comparative Examples
Table 5: the comparative illustration of technique of the present invention and prior art processes
Claims (8)
1. preparation technology at the modifying asphalt of rear interpolation stablizer, it is characterized in that, the heating and melting matrix pitch is divided into two portions, the matrix pitch that most of matrix pitch was wherein thrown in as early stage, the matrix pitch that the small portion matrix pitch was thrown in as the later stage, then with properties-correcting agent, be mixed in the matrix pitch adding mixing tank of throwing in compatilizer and early stage and melt swollen system, the described system of expanding of melting is sent into stirring growth in the products pot after milling treatment of colloid, after the matrix pitch of throwing in until early stage and properties-correcting agent melt swollen reacting balance, the matrix pitch and the stablizer that add the later stage input continue to stir growth and obtain modifying asphalt.
2. the preparation technology of the modifying asphalt at rear interpolation stablizer according to claim 1 is characterized in that, the ratio between the matrix pitch of the matrix pitch of throwing in described early stage and later stage input is 3:1 ~ 9:1.
3. the preparation technology of the modifying asphalt at rear interpolation stablizer according to claim 1 is characterized in that, control described later stage matrix pitch and add flow velocity in 35 ~ 40 tons of/hour scopes, and the input frequency of described stablizer is in 15Hz ~ 20Hz scope.
4. the preparation technology of the modifying asphalt at rear interpolation stablizer according to claim 1 is characterized in that, described stablizer described early stage matrix pitch and properties-correcting agent grow and add after melting swollen 4 ~ 5 hours.
5. the preparation technology of the modifying asphalt at rear interpolation stablizer according to claim 1 is characterized in that, add the matrix pitch and stablizer that the later stage throws in after, continue to grow and obtain modifying asphalt more than 8 hours.
6. the preparation technology of the modifying asphalt at rear interpolation stablizer according to claim 1, it is characterized in that, the input frequency 25Hz ~ 28Hz of described properties-correcting agent, described compatilizer is by per hour 0.5 ~ 2 ton speed input, described matrix pitch charging in early stage frequency 28Hz ~ 35Hz.
7. the preparation technology of the modifying asphalt at rear interpolation stablizer according to claim 1 is characterized in that, control colloidal mill temperature out is in 190 ~ 205 ℃ of scopes.
8. the preparation technology of the modifying asphalt at rear interpolation stablizer according to claim 1 is characterized in that, controls the developmental temperature of described products pot in 185 ~ 200 ℃ of scopes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210423089.3A CN102942700B (en) | 2012-10-29 | 2012-10-29 | Preparation technology of modified asphalt by adding stabilizer at later stage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210423089.3A CN102942700B (en) | 2012-10-29 | 2012-10-29 | Preparation technology of modified asphalt by adding stabilizer at later stage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102942700A true CN102942700A (en) | 2013-02-27 |
| CN102942700B CN102942700B (en) | 2014-05-14 |
Family
ID=47725706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210423089.3A Active CN102942700B (en) | 2012-10-29 | 2012-10-29 | Preparation technology of modified asphalt by adding stabilizer at later stage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102942700B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104560089A (en) * | 2013-10-22 | 2015-04-29 | 中国石油化工股份有限公司 | Method for producing asphalt with high softening point |
| CN104560086A (en) * | 2013-10-22 | 2015-04-29 | 中国石油化工股份有限公司 | Preparation method for asphalt with high softening point |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101508848A (en) * | 2009-03-18 | 2009-08-19 | 广州路翔股份有限公司 | Modified emulsified asphalt, production method and CA mortar comprising the emulsified asphalt |
-
2012
- 2012-10-29 CN CN201210423089.3A patent/CN102942700B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101508848A (en) * | 2009-03-18 | 2009-08-19 | 广州路翔股份有限公司 | Modified emulsified asphalt, production method and CA mortar comprising the emulsified asphalt |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104560089A (en) * | 2013-10-22 | 2015-04-29 | 中国石油化工股份有限公司 | Method for producing asphalt with high softening point |
| CN104560086A (en) * | 2013-10-22 | 2015-04-29 | 中国石油化工股份有限公司 | Preparation method for asphalt with high softening point |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102942700B (en) | 2014-05-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101514031B (en) | Titanium ore acidolysis method through sulfuric acid process | |
| CN107353655A (en) | A kind of large dosage stable type rubber powder modified asphalt and preparation method thereof | |
| CN101768788B (en) | Production process for directly-spun terylene industrial filament of liquid-phase tackifying fusant | |
| CN101857394A (en) | Production method of superfine glass wool product | |
| CN205361212U (en) | Jet stirring device | |
| CN102887919A (en) | Production method of triphenylphosphine | |
| CN102942700B (en) | Preparation technology of modified asphalt by adding stabilizer at later stage | |
| CN104447456A (en) | Preparation method of tellurium diethyl dithiocarbamate, pre-dispersing masterbatch particles comprising tellurium diethyl dithiocarbamate and preparation method thereof | |
| CN104402023A (en) | Production method for raising granularity of sodium bicarbonate product obtained by carbonization method | |
| CN104194036A (en) | Regenerant for regenerated rubber and preparation method of regenerant | |
| CN103665277B (en) | A kind of preparation method of water-fast building emulsion | |
| CN103360547A (en) | System and method for producing dicyclopentadiene hydrogenated petroleum resin | |
| CN102351683A (en) | Production process of zinc acrylate | |
| CN101298503A (en) | Instant dissolution method of sodium carboxymethylcellulose in organosilicon foam killer preparation process | |
| CN103451051B (en) | Preparation method of disproportionated rosin potassium soap with solid content of 25 percent | |
| CN104445281A (en) | Waste residue comprehensive utilization method for trichlorosilane leaching system | |
| CN204767551U (en) | High efficiency crystallization kettle | |
| CN107057387A (en) | It is a kind of to refine road mix asphalt of tar sand and preparation method thereof altogether containing kerosene | |
| CN204509206U (en) | A kind of movable type emulsified asphalt production unit | |
| CN203794818U (en) | Production system for continuous production of direct-spinning copolymer type antistatic polyester | |
| CN110467825A (en) | A kind of Warm-Mix Bitumen Mixture and preparation method thereof containing reworked material | |
| CN102731583B (en) | Preparation method of sucrose benzoate | |
| CN203360355U (en) | Recovery device for waste polyester bottle chip | |
| CN103342832B (en) | Recovery device and recovery process of waste polyester bottle flakes | |
| CN203253414U (en) | Continuous high-pressure closed reaction device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |