CN101775308A - Method for producing modified asphalt - Google Patents
Method for producing modified asphalt Download PDFInfo
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- CN101775308A CN101775308A CN201010110477A CN201010110477A CN101775308A CN 101775308 A CN101775308 A CN 101775308A CN 201010110477 A CN201010110477 A CN 201010110477A CN 201010110477 A CN201010110477 A CN 201010110477A CN 101775308 A CN101775308 A CN 101775308A
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Abstract
The invention provides a method for producing modified asphalt. In the method, after coal tar is fed in a tube furnace for heating, the coal tar is fed to a secondary evaporator for distillation; the formed medium-temperature is fed to a reaction tower; when the temperature in the tower is lower than the required temperature, high temperature tar is directly injected in the reaction tower to ensure that the medium-temperature asphalt and the high-temperature asphalt are mixed in the reaction tower to realize temperature adjustment and perform a mixing reaction; and the reacted asphalt is fed in a modifying tower for flash evaporation to obtain the modified asphalt. The method prepares the modified asphalt by mixing the medium-temperature asphalt and the high-temperature tar, saves energy consumption by over 50 percent approximately compared with modified asphalt process in the country, saves energy and reduces consumption, accords with the development tendency of low carbon economy, and reduces environmental pollution. Furthermore, the method directly adjusts the temperature from the inside of the reaction tower by a method of mixing the high-temperature tar and the medium-temperature tar, so heat can be easily conducted, materials are evenly heated, and the product quality is remarkably improved. The preparation method has easily controlled production process, saves man power and has high production efficiency.
Description
Technical field
The present invention relates to PRODUCTION OF PITCH technology, specifically a kind of production method of modified pitch.
Background technology
Modified pitch is to be raw material with the mid-temperature pitch, makes through upgrading.Domestic modified pitch production technique generally adopts still formula thermal polymerization process, and this handicraft product is fair, does not reach export standard, energy consumption height, contaminate environment.And external technology generally adopts twin furnace bifunctional polymerizable tower process, and this technology investment is big, the equipment part costliness, and product is single.Above technology all needs to use thermals source such as coal gas to come control reaction temperature in the upgrading process, and the energy consumption height does not meet the development trend of low-carbon economy.And the mode of indirect heating makes heat conduction inequality in the reactor, and temperature is wayward, and quality product can not get ensureing.
Summary of the invention
Technical problem to be solved by this invention provides a kind of production method of modified pitch, has low, the high product quality advantages of energy consumption.
The present invention solves the problems of the technologies described above the technical scheme that is adopted to be: its production equipment comprises employing tube furnace, flash evaporator, reaction tower, upgrading tower, cut tower, water cooler, vapour liquid separator and vacuum pump, and production method comprises the steps:
(1), employing coal tar is raw material, the naphthalene content of coal tar 〉=7%, ash content≤0.13%, toluene insolubles 3.5-7%, viscosity Engler＜4.0 of coal tar in the time of 80 ℃, density 1.15-1.21;
(2), coal tar is sent into tube furnace, be heated into 370-420 ℃ high temperature tar, after send into flash evaporator, distill;
(3), the distillation temperature of flash evaporator control is: 360-380 ℃, time 5-30 minute, still-process was for continuing to form mid-temperature pitch, and the oil gas that produces in the still-process enters the cut tower cooler and collects;
(4), the mid-temperature pitch that step (3) is formed is sent into reaction tower, temperature in the reaction tower is controlled at 365-400 ℃, when the temperature in the reaction tower is lower than when temperature required, directly in reaction tower, inject high temperature tar by the pipeline between tube furnace and the reaction tower, mid-temperature pitch and high temperature tar are mixed in reaction tower realize temperature regulation, and carry out hybrid reaction, reaction times 6-12 hour, keep air pressure 20-80Kpa, isolated oil gas is sent into flash evaporator in the reaction process, and reacted pitch is sent into the upgrading tower;
(5), the pitch of sending into the upgrading tower carries out flash distillation under the condition of negative pressure of-90--10KPa, flash-off time is 5-120 minute, the oil gas that evaporates is exported from cat head, cools off and separates, the pitch after the flash distillation enters the collection tower, promptly makes modified pitch.
The invention has the beneficial effects as follows: utilize mid-temperature pitch and high temperature tar to be mixed with modified pitch, temperature of reaction is regulated by the additional proportion of adjusting high temperature tar, production technique does not need to increase in addition thermal source, energy consumption is saved more than 50% than domestic modified pitch technology, energy-saving and cost-reducing, meet the development trend of low-carbon economy, reduced environmental pollution.And owing to use high temperature tar and mid-temperature pitch blended mode directly from the reaction tower internal temp., heat is easy to conduction, and material is heated evenly, and quality product is significantly improved.This preparation method's Production Flow Chart is easy to control, saves manpower, production efficiency height.
Description of drawings
Fig. 1 is technological process of production figure of the present invention.
Embodiment
A kind of production method of modified pitch, employing coal tar is raw material, utilizes production equipments such as tube furnace, flash evaporator, reaction tower, upgrading tower, cut tower, water cooler, vapour liquid separator and vacuum pump to be prepared into modified pitch.
Embodiment 1
A kind of production technique of modified pitch comprises the steps:
(1), employing coal tar is raw material, the naphthalene content 7% of coal tar, ash content 0.13%, toluene insolubles 7%, the viscosity Engler of coal tar in the time of 80 ℃ is 4.0, density is 1.15;
(2), coal tar is sent into the high temperature tar that tube furnace is heated into 370 ℃, send into flash evaporator then, distill;
(3), the distillation temperature of flash evaporator control is 360 ℃, 5 minutes time, still-process is for continuing to form 360 ℃ mid-temperature pitch, the oil gas that produces in the still-process enters the cut tower cooler and collects;
(4), the mid-temperature pitch that step (3) is formed is sent into reaction tower, temperature in the reaction tower is controlled at 365 ℃, temperature in reaction tower is lower than required temperature, when promptly being lower than 365 ℃, directly in reaction tower, inject 370 ℃ high temperature tar by the pipeline between tube furnace and the reaction tower, to guarantee to adjust in real time temperature, and make mid-temperature pitch and high temperature tar hybrid reaction 12 hours in reaction tower, keep air pressure 80Kpa, isolated oil gas returns flash evaporator again in the reaction process, and reacted pitch is sent into the upgrading tower;
(5), utilize vacuum pump that the upgrading tower is vacuumized, make the pitch of sending into the upgrading tower under the condition of negative pressure of-10KPa, carry out flash distillation, flash-off time is 120 minutes, and the oil gas that evaporates is exported from cat head, cools off and separates through supercooler and vapour liquid separator successively; Pitch after the flash distillation enters the collection tower, promptly makes modified pitch.
Embodiment 2
(1), employing coal tar is raw material, the naphthalene content 8% of coal tar, ash content are 0.1%, toluene insolubles 5%, the viscosity Engler of coal tar in the time of 80 ℃ is 3.0, density is 1.20;
(2), coal tar is sent into the high temperature tar that tube furnace is heated into 400 ℃, high temperature tar is sent into flash evaporator and is distilled;
(3), the distillation temperature controlled in the flash evaporator is 370 ℃, 16 minutes time, continue to form 370 ℃ mid-temperature pitch in the still-process, the oil gas that produces in the still-process enters the cut tower cooler and collects;
(4), the mid-temperature pitch that step (3) forms is sent into reaction tower, temperature in the reaction tower is controlled at 378 ℃, when the temperature in the reaction tower is lower than 378 ℃, the high temperature tar that directly injects 400 ℃ by the pipeline between tube furnace and the reaction tower in reaction tower makes it mix with 370 ℃ mid-temperature pitch sending into reaction tower, to guarantee to adjust in real time temperature, and make mid-temperature pitch and high temperature tar hybrid reaction 10 hours in reaction tower, keeping the reaction tower internal gas pressure is 50Kpa, isolated oil gas is sent into flash evaporator in the reaction process, and reacted pitch is sent into the upgrading tower;
(5), utilize vacuum pump that the upgrading tower is vacuumized, the pitch of sending into the upgrading tower carries out flash distillation under the condition of negative pressure of-90KPa, flash-off time is 5 minutes, the oil gas that evaporates is exported from cat head, cools off and separates through supercooler and vapour liquid separator successively; Pitch after the flash distillation is sent into the collection tower and is collected, and promptly makes modified pitch.
Embodiment 3
A kind of production technique of modified pitch comprises the steps:
(1), employing coal tar is raw material, the naphthalene content of coal tar is 9%, ash content 0.09%, toluene insolubles 3.5%, the viscosity Engler of coal tar in the time of 80 ℃ is 2.8, density is 1.21;
(2), coal tar is sent into tube furnace, send into flash evaporator after being heated into 420 ℃ high temperature tar, distill;
(3), the distillation temperature of coal tar in flash evaporator be 380 ℃, 30 minutes time, continue in the still-process to form mid-temperature pitch, the mid-temperature pitch temperature of formation is 380 ℃, the oil gas that produces in the still-process enters the cut tower cooler and collects;
(4), the mid-temperature pitch that step (3) is formed is sent into reaction tower, temperature in the reaction tower is controlled at 400 ℃, when the temperature in the reaction tower is lower than 400 ℃, directly in reaction tower, inject the high temperature tar that is heated to 420 ℃ by the pipeline between tube furnace and the reaction tower, adjust temperature in real time by thermal exchange, and make mid-temperature pitch and high temperature tar hybrid reaction 6 hours in reaction tower, the reaction tower internal gas pressure remains on 20Kpa, isolated oil gas is sent into flash evaporator in the reaction process, and reacted pitch is sent into the upgrading tower;
(5), the pitch of sending into the upgrading tower carries out flash distillation under the condition of negative pressure of-30KPa, flash-off time is 60 minutes, the oil gas that evaporates is exported from cat head, cools off and separates; Pitch after the flash distillation enters the collection tower, promptly makes modified pitch.The index of the modified pitch that makes is: 116 ℃ of pitch softening points, toluene insolubles 34%, quinoline insolubles 12.95%, ash content 0.24%, coking value 56%.
The mode that adopts high temperature tar and mid-temperature pitch hybrid reaction and adjust temperature is produced modified pitch, can make pitch softening point improve 5-8 ℃, toluene insolubles content raising 1-2%.
In above production technique, on flash evaporator, add a discharge port, simultaneously output mid-temperature pitch product.
Tube furnace used in the present invention and flash evaporator are the general-purpose equipment in the tar system process for preparing asphalt.Tube furnace is connected with flash evaporator by main pipe line, and the discharge port of flash evaporator is connected with material inlet on the reaction tower by pipeline, and tube furnace is connected with high temperature material import on the reaction tower by secondary duct.
Reaction tower used in the present invention is an encloses container, and reaction tower top is provided with two opening for feeds, is connected with flash evaporator with tube furnace respectively, is used to import mid-temperature pitch and high temperature tar.With pipeline that opening for feed is connected on control valve is set, be used to control inlet amount, to reach thermoregulated purpose.The reaction tower top also is provided with oil gas vent, and is connected with flash evaporator by oil and gas pipes, with in the reaction process from pitch isolated oil gas send flash evaporator again back to.Be provided with two discharge ports in the reaction tower bottom, be connected with the upgrading tower with the collection tower respectively, be used for the collection of warm modified pitch and carry pitch to the upgrading tower.Interface of the level gauge and thermometer boss are set on reaction tower, are convenient to detect pitch amount and temperature in the tower.Because before reaction tower formally was used for producing, temperature was lower in the tower, if this moment, mid-temperature pitch entered reaction tower, temperature descends more, and the high-temperature coke oil mass that need mix when adjusting temperature is too much.Therefore, can primary heater unit be set in the reaction tower bottom, primary heater unit is made up of heating tube.It is outside or inner that heating tube can be laid on reaction tower.Feed superheated vapour in the heating tube, play the effect of preheating reaction tower.After equipment brought into operation, material entered reaction tower continually, and temperature is kept by material itself in the tower, no longer needed heating, can stop to import steam.
Upgrading tower used in the present invention is an encloses container, and top is provided with material inlet and is used to receive the pitch of sending from reaction tower, and the upgrading top of tower is provided with the oil gas relief outlet, and the oil gas relief outlet is linked in sequence by pipeline and water cooler, gas-liquid separator and vacuum pump.When vacuumizing, the isolated oil gas of flash vaporization process is extracted out, after refrigerated separation, collect.The upgrading tower bottom is provided with collects mouth, is connected with the collection tower by pipeline.For improving the flash distillation effect of upgrading tower, a divider can be set in tower, make the pitch that enters the upgrading tower disperse to fall, increase the contact surface of pitch and air, improve flash efficiency.Divider can intersect with the steel pipe cut open from the axis and be welded to form, and is erected in the upgrading tower, split surface up, and in bottom hole.The pitch of input upgrading tower drops in the divider, and suitable steel pipe flows and fallen by bottom hole, when the pitch amount is big, can also overflow from both sides, plays the dispersive effect.Divider can also utilize steel plate to be welded to form, and it is provided with form and is not limited to above description, as long as can play dissemination.
Claims (1)
1. the production method of a modified pitch, its production equipment comprise and adopt tube furnace, flash evaporator, reaction tower, upgrading tower, cut tower, water cooler, vapour liquid separator and vacuum pump that it is characterized in that: production method comprises the steps:
(1), employing coal tar is raw material, the naphthalene content of coal tar 〉=7%, ash content≤0.13%, toluene insolubles 3.5-7%, viscosity Engler＜4.0 of coal tar in the time of 80 ℃, density 1.15-1.21;
(2), coal tar is sent into tube furnace, be heated into 370-420 ℃ high temperature tar, after send into flash evaporator, distill;
(3), the distillation temperature of flash evaporator control is: 360-380 ℃, time 5-30 minute, still-process was for continuing to form mid-temperature pitch, and the oil gas that produces in the still-process enters the cut tower cooler and collects;
(4), the mid-temperature pitch that step (3) is formed is sent into reaction tower, temperature in the reaction tower is controlled at 365-400 ℃, when the temperature in the reaction tower is lower than when temperature required, directly in reaction tower, inject high temperature tar by the pipeline between tube furnace and the reaction tower, mid-temperature pitch and high temperature tar are mixed in reaction tower realize temperature regulation, and carry out hybrid reaction, reaction times 6-12 hour, keep air pressure 20-80Kpa, isolated oil gas is sent into flash evaporator in the reaction process, and reacted pitch is sent into the upgrading tower;
(5), the pitch of sending into the upgrading tower carries out flash distillation under the condition of negative pressure of-90--10KPa, flash-off time is 5-120 minute, the oil gas that evaporates is exported from cat head, cools off and separates, the pitch after the flash distillation enters the collection tower, promptly makes modified pitch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010110477A CN101775308A (en) | 2010-02-21 | 2010-02-21 | Method for producing modified asphalt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010110477A CN101775308A (en) | 2010-02-21 | 2010-02-21 | Method for producing modified asphalt |
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| CN101775308A true CN101775308A (en) | 2010-07-14 |
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| CN201010110477A Pending CN101775308A (en) | 2010-02-21 | 2010-02-21 | Method for producing modified asphalt |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102994134A (en) * | 2011-09-08 | 2013-03-27 | 江苏国正新材料科技有限公司 | Atomization quenching and tempering tower |
| CN103160303A (en) * | 2011-12-19 | 2013-06-19 | 上海宝钢化工有限公司 | Adjusting device for coal tar pitch quality |
| CN103965931A (en) * | 2013-01-31 | 2014-08-06 | 北京宝塔三聚能源科技有限公司 | Preparation method of modified asphalt |
| CN104277465A (en) * | 2014-09-19 | 2015-01-14 | 中山市鸿程科研技术服务有限公司 | Process for extracting and processing modified asphalt |
| CN104804758A (en) * | 2015-04-09 | 2015-07-29 | 河南开炭新材料有限公司 | Process for asphalt modification through single heating, flash distillation and pressure sustaining |
| CN108315033A (en) * | 2018-02-13 | 2018-07-24 | 鞍钢股份有限公司 | A method of producing modified coal tar pitch |
| CN113755194A (en) * | 2020-06-03 | 2021-12-07 | 乌海宝化万辰煤化工有限责任公司 | Modified asphalt and preparation method thereof |
-
2010
- 2010-02-21 CN CN201010110477A patent/CN101775308A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102994134A (en) * | 2011-09-08 | 2013-03-27 | 江苏国正新材料科技有限公司 | Atomization quenching and tempering tower |
| CN103160303A (en) * | 2011-12-19 | 2013-06-19 | 上海宝钢化工有限公司 | Adjusting device for coal tar pitch quality |
| CN103160303B (en) * | 2011-12-19 | 2014-08-20 | 上海宝钢化工有限公司 | Adjusting device for coal tar pitch quality |
| CN103965931A (en) * | 2013-01-31 | 2014-08-06 | 北京宝塔三聚能源科技有限公司 | Preparation method of modified asphalt |
| CN103965931B (en) * | 2013-01-31 | 2016-01-20 | 北京宝塔三聚能源科技有限公司 | A kind of preparation method of modified pitch |
| CN104277465A (en) * | 2014-09-19 | 2015-01-14 | 中山市鸿程科研技术服务有限公司 | Process for extracting and processing modified asphalt |
| CN104804758A (en) * | 2015-04-09 | 2015-07-29 | 河南开炭新材料有限公司 | Process for asphalt modification through single heating, flash distillation and pressure sustaining |
| CN104804758B (en) * | 2015-04-09 | 2017-04-05 | 河南开炭新材料有限公司 | Heating flash evaporation holds the technique for pressing modified coal tar pitch |
| CN108315033A (en) * | 2018-02-13 | 2018-07-24 | 鞍钢股份有限公司 | A method of producing modified coal tar pitch |
| CN113755194A (en) * | 2020-06-03 | 2021-12-07 | 乌海宝化万辰煤化工有限责任公司 | Modified asphalt and preparation method thereof |
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Application publication date: 20100714 |