CN103242879A - Production method of modified pitch - Google Patents
Production method of modified pitch Download PDFInfo
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- CN103242879A CN103242879A CN2013101644020A CN201310164402A CN103242879A CN 103242879 A CN103242879 A CN 103242879A CN 2013101644020 A CN2013101644020 A CN 2013101644020A CN 201310164402 A CN201310164402 A CN 201310164402A CN 103242879 A CN103242879 A CN 103242879A
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Abstract
The invention discloses a production method of modified pitch. The production method is characterized by comprising the following steps that pitch directly enters into all reaction kettles which are connected in series from a secondary evaporator to be subjected to thermal polymerization and decomposition, the heating temperature inside all the serially connected kettles is controlled to be 400-430 DEG C, and reaction time is controlled to be 5-6 hours; decomposition products and light components after the reaction escape from the tops of the reaction kettles in the form of flash oil and gas, the flash oil and gas are cooled by a flash oil condensation condenser and then enter into a flash oil intermediate trough; the modified pitch flows out of the last reaction kettle to enter into a modified pitch intermediate trough; the modified pitch is pressurized using a modified pitch pump to enter into a pitch cooling trough and cooled by a pitch evaporation condenser to enter into a pitch overhead trough; and at last the pitch is detected before leaving factory. Serially connected reaction kettles and normal pressure thermal polymerization method are adopted for production, the pitch continuously passes through three segments of reaction kettles, production process is steady, quality is stable, and a flue gas trap is also arranged on the pitch cooling trough so that the generated flue gas is fast exhausted to prevent environment pollution. The production method disclosed by the invention is simple and reasonable in process, and good in production environment, and the prepared modified pitch is stable in quality.
Description
Technical field
The present invention relates to PRODUCTION OF PITCH technology, specifically is a kind of production method of modified pitch.
Background technology
Pitch is that series of processes such as raw material dewaters, distillation obtain with coal tar.And modified pitch is to be raw material with the mid-temperature pitch, makes through upgrading.The production technique of domestic modified pitch generally adopts still formula thermal polymerization process, and the quality product that this technology makes is general, energy consumption height, contaminate environment.And the external general twin furnace bifunctional polymerizable tower process that adopts, but investment is big, and equipment part is expensive, and product is single.
Modified pitch is the important source material of producing Graphite Electrodes, anode mix, anode carbon block and carbon product thereof, advantage such as have that adhesive property is good, conductivity is good, electrode oxidation-resistance and thermal stability are good, modified pitch has generally replaced mid-temperature pitch as the binding agent of carbon product at present.
The method for modifying of mid-temperature pitch mainly contains vacuum flashing method, normal pressure thermal polymerization method and pressurization thermal polymerization method at present, and wherein vacuum flashing method is for the production of hard pitch mainly; The normal pressure thermal polymerization method is the continuous thermal polymerization method of still formula normal pressure, generally can only produce the higher modified pitch of softening temperature; The pressurization thermal polymerization method can make the higher modified pitch of quality, but equipment requirements is higher.And in the process of cooling of pitch inflow cooling tank, can go out a large amount of flue gases by bulk storage, have a strong impact on production environment.
Summary of the invention
Technical problem to be solved by this invention provides a kind of production method of modified pitch, adopts still formula series connection normal pressure thermal polymerization method to produce, the modified pitch steady quality that makes, and also production environment is good, compliance with environmental protection requirements.
The present invention solves the problems of the technologies described above the technical scheme that adopts: a kind of production method of modified pitch is characterized in that may further comprise the steps:
1) pitch is directly advanced by the second evaporator of tar processing in each reactor of series connection to carry out hot polymerization, decomposition reaction, and the Heating temperature of each reactor of control series connection is 400～430 ℃, and the reaction times is 5～6 hours;
2) pitch is overflowed by the reactor top with the form of flash distillation oil gas through reacted degradation production and light component, through entering the flash oil medial launder after the cooling of flash oil condensate cooler;
3) outlet of modified pitch last reactor from each reactor of connecting is flowed out and is entered the modified pitch medial launder;
4) at the modified pitch medial launder bitumenpump is installed, modified pitch, is sent into the pitch height and is put groove through entering the pitch cooling tank with the bitumenpump pressurization after the cooling of pitch vaporization and condensation device;
5) dispatch from the factory or after the chain mat machine water cooling, dispatch from the factory with solid bitumen with heat of liquid pitch finally by check.
As improvement, described reactor is three of series connection, and wherein the temperature of first section reactor is 400～410 ℃, and the temperature of second section reactor is 410～420 ℃, and the temperature of the 3rd section reactor is 420～430 ℃, and the reaction times is 5～5.5 hours.
As improvement, the heating in the described step 1) is to adopt the coal gas heating, is provided with the scraper type stirrer in each reactor inside, and the rotating speed of agitator is 100～150 rev/mins.
Improve, the temperature of the bitumenpump of described step 4) is 380～400 ℃ again, and pressure is 20～80Kpa.
At last, the pitch cooling tank of described step 4) is provided with Fume collector, and the flue gas that modified pitch diffuses out through the Fume collector sucking-off, sprays into washing tower and Venturi meter by the washing oil pump with washing oil, makes the cigarette of suction, is condensed in washing tower and eliminates.
Compared with prior art, the invention has the advantages that: adopt still formula series connection normal pressure thermal polymerization method to produce, pitch passes through three sections reactors, reacting balance in the production process, the steady quality of product continuously; Fume collector also is set on the pitch cooling tank, makes that the flue gas that produces is siphoned away fast, improved pitch production operation environment, avoided environmental pollution.Technology advantages of simple of the present invention, the modified pitch steady quality that makes, and also production environment is good, compliance with environmental protection requirements
Description of drawings
Fig. 1 is the technological process of production figure of modified pitch of the present invention.
Embodiment
Describe in further detail below in conjunction with the present invention of accompanying drawing embodiment.
Embodiment 1
A kind of production method of modified pitch may further comprise the steps:
1) pitch is directly advanced by the second evaporator of tar processing in three reactors of series connection to carry out hot polymerization, decomposition reaction, the heating of employing coal gas, the temperature of first section reactor of control is 405 ℃, the temperature of second section reactor is 415 ℃, the temperature of the 3rd section reactor is 425 ℃, reaction times is 5.5 hours, is provided with the scraper type stirrer in each reactor inside, and the rotating speed of agitator is 120 rev/mins;
2) pitch is overflowed by the reactor top with the form of flash distillation oil gas through reacted degradation production and light component, through entering the flash oil medial launder after the cooling of flash oil condensate cooler;
3) outlet of modified pitch last reactor from each reactor of connecting is flowed out and is entered the modified pitch medial launder;
4) at the modified pitch medial launder bitumenpump is installed, the temperature of bitumenpump is 380～400 ℃, and modified pitch, is sent into the pitch height and put groove through entering the pitch cooling tank with the bitumenpump pressurization after the cooling of pitch vaporization and condensation device, and wherein pressure is 50Kpa;
5) dispatch from the factory or after the chain mat machine water cooling, dispatch from the factory with solid bitumen with heat of liquid pitch finally by check.
Embodiment 2
A kind of production method of modified pitch may further comprise the steps:
1) pitch is directly advanced by the second evaporator of tar processing in three reactors of series connection to carry out hot polymerization, decomposition reaction, the heating of employing coal gas, the temperature of first section reactor of control is 400 ℃, the temperature of second section reactor is 410 ℃, the temperature of the 3rd section reactor is 420 ℃, reaction times is 6 hours, is provided with the scraper type stirrer in each reactor inside, and the rotating speed of agitator is 100 rev/mins;
2) pitch is overflowed by the reactor top with the form of flash distillation oil gas through reacted degradation production and light component, through entering the flash oil medial launder after the cooling of flash oil condensate cooler;
3) outlet of modified pitch last reactor from each reactor of connecting is flowed out and is entered the modified pitch medial launder;
4) at the modified pitch medial launder bitumenpump is installed, the temperature of bitumenpump is 400 ℃, and modified pitch, is sent into the pitch height and put groove through entering the pitch cooling tank with the bitumenpump pressurization after the cooling of pitch vaporization and condensation device, and wherein pressure is 30Kpa;
5) dispatch from the factory or after the chain mat machine water cooling, dispatch from the factory with solid bitumen with heat of liquid pitch finally by check.
Embodiment 3
A kind of production method of modified pitch may further comprise the steps:
1) pitch is directly advanced by the second evaporator of tar processing in three reactors of series connection to carry out hot polymerization, decomposition reaction, the heating of employing coal gas, the temperature of first section reactor of control is 410 ℃, the temperature of second section reactor is 420 ℃, the temperature of the 3rd section reactor is 430 ℃, reaction times is 5 hours, is provided with the scraper type stirrer in each reactor inside, and the rotating speed of agitator is 150 rev/mins;
2) pitch is overflowed by the reactor top with the form of flash distillation oil gas through reacted degradation production and light component, through entering the flash oil medial launder after the cooling of flash oil condensate cooler;
3) outlet of modified pitch last reactor from each reactor of connecting is flowed out and is entered the modified pitch medial launder;
4) at the modified pitch medial launder bitumenpump is installed, the temperature of bitumenpump is 380 ℃, and modified pitch, is sent into the pitch height and put groove through entering the pitch cooling tank with the bitumenpump pressurization after the cooling of pitch vaporization and condensation device, and wherein pressure is 80Kpa;
5) dispatch from the factory or after the chain mat machine water cooling, dispatch from the factory with solid bitumen with heat of liquid pitch finally by check.
Claims (5)
1. the production method of a modified pitch is characterized in that may further comprise the steps:
1) pitch is directly advanced by the second evaporator of tar processing in each reactor of series connection to carry out hot polymerization, decomposition reaction, and the Heating temperature of each reactor of control series connection is 400～430 ℃, and the reaction times is 5～6 hours;
2) pitch is overflowed by the reactor top with the form of flash distillation oil gas through reacted degradation production and light component, through entering the flash oil medial launder after the cooling of flash oil condensate cooler;
3) outlet of modified pitch last reactor from each reactor of connecting is flowed out and is entered the modified pitch medial launder;
4) at the modified pitch medial launder bitumenpump is installed, modified pitch, is sent into the pitch height and is put groove through entering the pitch cooling tank with the bitumenpump pressurization after the cooling of pitch vaporization and condensation device;
5) dispatch from the factory or after the chain mat machine water cooling, dispatch from the factory with solid bitumen with heat of liquid pitch finally by check.
2. production method according to claim 1, it is characterized in that: described reactor is three of series connection, wherein the temperature of first section reactor is 400～410 ℃, the temperature of second section reactor is 410～420 ℃, the temperature of the 3rd section reactor is 420～430 ℃, and the reaction times is 5～55 hours.
3. production method according to claim 1 is characterized in that: the heating in the described step 1) is to adopt the coal gas heating, is provided with the scraper type stirrer in each reactor inside, and the rotating speed of agitator is 100～150 rev/mins.
4. production method according to claim 1, it is characterized in that: the temperature of the bitumenpump of described step 4) is 380～400 ℃, pressure is 20～80Kpa.
5. production method according to claim 1, it is characterized in that: the pitch cooling tank of described step 4) is provided with Fume collector, the flue gas that modified pitch diffuses out, through the Fume collector sucking-off, by the washing oil pump washing oil is sprayed into washing tower and Venturi meter, make the cigarette of suction, in washing tower, be condensed and eliminate.
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| CN2013101644020A CN103242879A (en) | 2013-04-25 | 2013-04-25 | Production method of modified pitch |
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| CN2013101644020A CN103242879A (en) | 2013-04-25 | 2013-04-25 | Production method of modified pitch |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105331384A (en) * | 2015-11-23 | 2016-02-17 | 首钢水城钢铁（集团）有限责任公司 | Modified asphalt continuous production system and method |
Citations (2)
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|---|---|---|---|---|
| CN101289624A (en) * | 2008-06-03 | 2008-10-22 | 山西宏特煤化工有限公司 | Process for producing moderate temperature modified bitumen by continuously pressurizing and hot-polymerizing at two stages connected in series |
| CN102311747A (en) * | 2011-08-30 | 2012-01-11 | 河南宝舜化工科技有限公司 | Furnace-kettle type modified pitch production system and production process |
-
2013
- 2013-04-25 CN CN2013101644020A patent/CN103242879A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101289624A (en) * | 2008-06-03 | 2008-10-22 | 山西宏特煤化工有限公司 | Process for producing moderate temperature modified bitumen by continuously pressurizing and hot-polymerizing at two stages connected in series |
| CN102311747A (en) * | 2011-08-30 | 2012-01-11 | 河南宝舜化工科技有限公司 | Furnace-kettle type modified pitch production system and production process |
Non-Patent Citations (2)
| Title |
|---|
| 李超: "武钢煤沥青发展对策和生产技术研究", 《中国优秀硕士学位论文全文数据库-工程科技I辑》 * |
| 郁健等: "煤沥青热聚合改质研究", 《煤炭转化》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105331384A (en) * | 2015-11-23 | 2016-02-17 | 首钢水城钢铁（集团）有限责任公司 | Modified asphalt continuous production system and method |
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Application publication date: 20130814 |