CN106281392B - Method for producing medium-temperature modified asphalt in low-temperature low-pressure continuous cycle manner - Google Patents
Method for producing medium-temperature modified asphalt in low-temperature low-pressure continuous cycle manner Download PDFInfo
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Abstract
The invention relates to the technical field of coal tar deep processing, and particularly provides a novel method for preparing medium-temperature modified pitch used for preparing high-quality electrode paste. The method for producing the medium-temperature modified asphalt in the low-temperature low-pressure continuous circulating mode provides enough polymerization time at lower temperature and pressure, and performs thermal polymerization in a forced circulating mode at a high flow rate through the heating furnace, so that the phenomenon that the medium-temperature asphalt is excessively polymerized to generate a secondary QI tendency is avoided, the risk of coking and blocking of the pipeline is reduced to the maximum extent, and the production period can reach 6 months to one year.
Description
Technical field
The present invention relates to coal tar deep processing technical fields, are provided in particular in a kind of prepare in used in good electrode paste
Warm modified coal tar pitch new method.
Background technique
Electrode paste is the primary raw material of continous way automatic-baking electrode, and the product energy high temperature resistant, thermal expansion coefficient is small, resistance
Coefficient is small, and the porosity is small, and electric energy loss is low, and oxidation rate is slow.In order to reduce cost, competitiveness is promoted, at present country's electrode paste
Etc. electrode productions factory start mostly using medium temperature modified coal tar pitch as binder.Medium temperature modified coal tar pitch have mobility, wellability,
The advantages that plasticity is good, heating agent conduction oil temperature control is at 200 DEG C hereinafter, reducing energy consumption；Have simultaneously close to modification drip
Green coking value, improves yield, product density, mechanical strength, electric conductivity etc..
" research and experiment of medium temperature modified coal tar pitch production " (Laigang coking that " Laigang and science and technology " the 3rd periodical in 2004 is stepped on
Factory Chen Yewen) method that the flash oil preparation medium temperature modified coal tar pitch with 5% or so is returned in modified coal tar pitch is proposed in a text, but
In use, quality fluctuation is larger for the electrode produced, and is easily broken off.
Patent 200810038495.1 discloses a kind of side of two sections of series connection continuous pressure hot polymerization production medium temperature modified coal tar pitch
Method, mid temperature pitch obtain modified coal tar pitch by two sections of tandem reaction kettle thermal polycondensations, wherein carry out heating pre- cracking instead in first segment
It answers, carries out heating polycondensation reaction in second segment tandem reaction kettle, to improve β resin, reacting rear material enters flash column, herein
Adjust the softening point of pitch.This method is connected using 2 kettles, and pressure control is very high to the stress levels of equipment in 0.4-0.5Mpa,
Temperature reaches 400 DEG C, be easy to cause pipeline coking and blocks, and will increase wastewater treatment using superheated steam adjustment softening point
Process.
Patent 201010110449.5 discloses a kind of method of medium temperature modified coal tar pitch, and raw material is first sent into tube furnace, production
The high temperature tar of high temperature tar, generation is sent into flash evaporator through main pipeline, is additionally provided with secondary duct all the way and leads directly to reaction tower, high temperature
Tar generates mid temperature pitch through distillation, and then medium temperature modified coal tar pitch is generated in reaction tower, and reaction temperature is by adjusting high-temperature coke
The additional amount of oil is adjusted.This method is deployed using high temperature coal-tar, be easy to cause mid temperature pitch quality uneven,
Simultaneity factor temperature is higher, is easy to cause furnace coking.Patent 201010110445.7 and 201010110449.5 class of patent
Seemingly, it is proposed for same company.
Patent 201210545373.8 discloses a kind of no interphase medium temperature Existing in Improved Pitch Production System and production method, and two
The mid temperature pitch that secondary evaporator or king-tower generate passes through 3 concatenated reaction kettles, and the mid temperature pitch that bottom generates enters medium temperature
Modified coal tar pitch medial launder recycles after the condensation of flash overhead oil.This method uses traditional tank polymerization method, temperature of reaction kettle control
It is fed at 360~380 DEG C, and between each reaction kettle by gravity flow, be easy to cause pipeline coking and blocking, the production cycle is typically maintained in
Within 3 months.
Summary of the invention
The purpose of the present invention is to solve problem of the existing technology, a kind of low-temp low-pressure is provided and continuously recycles production
The method of medium temperature modified coal tar pitch produces good electrode paste medium temperature modified coal tar pitch.
To achieve the goals above, technical scheme is as follows:
A kind of method that low-temp low-pressure continuously recycles production medium temperature modified coal tar pitch comprising following steps:
S1: through vacuum tower after the maltha of coke tar distillation tower king-tower is mixed with the mid temperature pitch that vacuum tower circulating slot is sent
After heating stove heating, it is sent into vacuum tower and extracts carbolineum；
S2: by the mid temperature pitch of VACUUM TOWER BOTTOM from indentation pitch circulating slot, first stage polymerization is carried out at 360~365 DEG C
It reacts, and adjusts the softening point of pitch by top vacuum, the product section after first stage polymerization reaction is carried out according to S1 step
Mixing is transported to asphalt reactor in the case of remaining pitch keeps stop 4-6 small in circulating slot；
S3: the pitch into reactor carries out secondary polymerization reaction at 345~355 DEG C, the pitch of reactor bottom with
It is mixed in S2 step into the material asphalt of the reactor, modified asphalt heating kettle is recycled into reactor, and remaining pitch is logical
It crosses after reactor Liquid level stops 4~6 hours and obtains medium temperature modified bitumen product；
S4: after the tiny structure introducing exhaust of the through enturi tube formation of reactor head bitumen flue gas is cleaned, same to vacuum tower
The exhaust gas of vacuum pump discharge enters modified coal tar pitch heating furnace jointly and is burned.
Preferably, vacuum tower heating furnace internal circulating load described in step S1 is 200~210m3/h。
Preferably, the time of the reaction of first stage polymerization described in step S2 is 4~6 hours, Top of Vacuum Tower vacuum
In 30~40Kpa.
Preferably, the modified coal tar pitch heating furnace internal circulating load of secondary polymerization reaction described in step S3 be 90~
110m3/ h, reaction time are 4~6 hours.
The method that a kind of low-temp low-pressure of the present invention continuously recycles production medium temperature modified coal tar pitch, in lower temperature and pressure
Under, enough polymerization times are provided, thermal polymerization is carried out with big flow forced circulation by heating furnace, avoids mid temperature pitch mistake
Degree polymerize and generates secondary QI tendency, reduces the risk of pipeline coking and blocking to greatest extent, the production cycle can reach 6 months
By 1 year.
Detailed description of the invention
Fig. 1 is process flow chart of the invention.
In figure: 1- vacuum tower heating furnace, 2- vacuum tower, 3- pitch circulating slot, 4- reactor, 5- reactor heating furnace.
Specific embodiment
Below with reference to the attached drawing of embodiment, detailed description of the preferred embodiments.
Process flow of the invention is as shown in Figure 1, maltha is mixed through the boosting of raw material pump and the mid temperature pitch of pitch circulating slot
It closes and enters vacuum tower heating furnace 1, keep internal circulating load in 200~210m3/ h is sent into the lower part of vacuum tower 2, vacuum tower after heated
2 column bottom temperatures maintain 360~365 DEG C, and 2 top gaseous phase vacuum of vacuum tower maintains 30~40KPa, and side take-off carbolineum subtracts
Pressure 2 tower bottom pitch of tower is communicated with pitch circulating slot 3, and by standing polymerization 4~6 hours, a part of pitch maintains reactor heating
5 internal circulating load of furnace, another part mid temperature pitch are sent to reactor 4.
The mid temperature pitch and reactor bottom pitch sent from pitch circulating slot 3 are mixed into reactor heating furnace 5, keep following
Circular rector is in 90~110m3/ h, temperature of reactor maintain 345~355 DEG C, and pressure maintenance is operated under normal pressure, and pitch exists
This polymerization time rests on 4~6 hours, and 4 bottom of reactor obtains good medium temperature modified coal tar pitch.
After venturi introducing exhaust is cleaned, the exhaust gas with 2 vacuum pump of vacuum tower enters 4 top gas phase of reactor jointly
Heating furnace is burned.
Medium temperature modified coal tar pitch and compareing for national standard modified coal tar pitch are as shown in table 1 after present case is implemented.
The method that a kind of low-temp low-pressure of the present invention continuously recycles production medium temperature modified coal tar pitch, in lower temperature and pressure
Under, enough polymerization times are provided, thermal polymerization is carried out with big flow forced circulation by heating furnace, avoids mid temperature pitch mistake
Degree polymerize and generates secondary QI tendency, reduces the risk of pipeline coking and blocking to greatest extent, the production cycle can reach 6 months
By 1 year.
Table 1
In conclusion only presently preferred embodiments of the present invention, is not used to limit the scope of implementation of the present invention, it is all according to
Equivalent changes and modifications carried out by shape described in scope of the invention as claimed, construction, feature and spirit should be included in this
In the scope of the claims of invention.
Claims (4)
1. a kind of method that low-temp low-pressure continuously recycles production medium temperature modified coal tar pitch, which comprises the steps of:
S1: it is heated after the maltha of coke tar distillation tower king-tower is mixed with the mid temperature pitch that vacuum tower circulating slot is sent through vacuum tower
After stove heating, it is sent into vacuum tower and extracts carbolineum；
S2: vacuum tower tower bottom pitch is communicated with pitch circulating slot, by the mid temperature pitch of VACUUM TOWER BOTTOM from indentation pitch circulating slot,
First stage polymerization reaction is carried out at 360~365 DEG C in pitch circulating slot, and adjusts the softening of pitch by Top of Vacuum Tower vacuum
Point, first stage polymerization reaction after product section mixed according to S1 step, remaining pitch is kept in circulating slot stop 4~
In the case of 6 is small, it is transported to asphalt reactor；
S3: the pitch into asphalt reactor carries out secondary polymerization reaction at 345~355 DEG C, the pitch of reactor bottom with
It is mixed in S2 step into the material asphalt of the reactor, modified asphalt heating kettle is recycled into reactor, and remaining pitch is logical
It crosses after reactor Liquid level stops 4~6 hours and obtains medium temperature modified bitumen product；
S4: the tiny structure of the through enturi tube formation of reactor head bitumen flue gas introduces exhaust and washes after washing facility cleans, with subtracting
The exhaust gas of pressure tower vacuum pump discharge enters modified coal tar pitch heating furnace jointly and is burned.
2. the method that low-temp low-pressure as described in claim 1 continuously recycles production medium temperature modified coal tar pitch, which is characterized in that step
Vacuum tower heating furnace internal circulating load described in S1 is 200~210m3/h。
3. the method that low-temp low-pressure as described in claim 1 continuously recycles production medium temperature modified coal tar pitch, which is characterized in that step
The time of the reaction of first stage polymerization described in S2 is 4~6 hours, and Top of Vacuum Tower vacuum is in 30~40KPa.
4. the method that low-temp low-pressure as described in claim 1 continuously recycles production medium temperature modified coal tar pitch, which is characterized in that step
The modified coal tar pitch heating furnace internal circulating load of secondary polymerization reaction described in S3 is 90~110m3/ h, reaction time are 4~6 hours.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510362891.XA CN106281392B (en) | 2015-06-26 | 2015-06-26 | Method for producing medium-temperature modified asphalt in low-temperature low-pressure continuous cycle manner |
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| CN201510362891.XA CN106281392B (en) | 2015-06-26 | 2015-06-26 | Method for producing medium-temperature modified asphalt in low-temperature low-pressure continuous cycle manner |
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| CN106281392B true CN106281392B (en) | 2019-04-12 |
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| CN109251757A (en) * | 2017-07-13 | 2019-01-22 | 鞍钢股份有限公司 | Method for producing mesophase-free asphalt by using reaction kettle |
| CN114231307B (en) * | 2021-12-30 | 2022-10-14 | 祥峰科技有限公司 | Preparation process of modified asphalt |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1717275A1 (en) * | 2005-04-25 | 2006-11-02 | Repsol Ypf S.A. | Bituminous binder, process for applying the same and its use for road paving |
| CN101074381A (en) * | 2006-05-17 | 2007-11-21 | 大连圣安煤化工有限公司 | Hydrogenation for processing and utilizing coal tar |
| CN101775304A (en) * | 2010-02-21 | 2010-07-14 | 河南海星化工科技有限公司 | Modified asphalt and method for preparing same at medium temperature |
| CN101775305A (en) * | 2010-02-21 | 2010-07-14 | 河南海星化工科技有限公司 | Production method for medium-temperature modified asphalt |
| WO2010132321A3 (en) * | 2009-05-15 | 2010-12-29 | Saudi Arabian Oil Company | Process for upgrading hydrocarbon feedstocks using solid adsorbent and membrane separation of treated product stream |
| CN102492453A (en) * | 2011-12-12 | 2012-06-13 | 宝钢工程技术集团有限公司 | Smokeless underwater forming production device for pitch and technology thereof |
-
2015
- 2015-06-26 CN CN201510362891.XA patent/CN106281392B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1717275A1 (en) * | 2005-04-25 | 2006-11-02 | Repsol Ypf S.A. | Bituminous binder, process for applying the same and its use for road paving |
| CN101074381A (en) * | 2006-05-17 | 2007-11-21 | 大连圣安煤化工有限公司 | Hydrogenation for processing and utilizing coal tar |
| WO2010132321A3 (en) * | 2009-05-15 | 2010-12-29 | Saudi Arabian Oil Company | Process for upgrading hydrocarbon feedstocks using solid adsorbent and membrane separation of treated product stream |
| CN101775304A (en) * | 2010-02-21 | 2010-07-14 | 河南海星化工科技有限公司 | Modified asphalt and method for preparing same at medium temperature |
| CN101775305A (en) * | 2010-02-21 | 2010-07-14 | 河南海星化工科技有限公司 | Production method for medium-temperature modified asphalt |
| CN102492453A (en) * | 2011-12-12 | 2012-06-13 | 宝钢工程技术集团有限公司 | Smokeless underwater forming production device for pitch and technology thereof |
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Address after: Weisan Road Chemical Office Building, Baoshan District, Shanghai, 2004 Applicant after: Baowu Carbon Material Technology Co., Ltd. Address before: No. 3501 Tongji Road, Baoshan District, Shanghai 201900 Applicant before: Chemical Co., Ltd. of Baoshan Iron and Steel Group, Shanghai |
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Address after: Weisan Road Chemical Office Building, Baoshan District, Shanghai, 2004 Patentee after: Baowu Carbon Technology Co.,Ltd. Address before: Weisan Road Chemical Office Building, Baoshan District, Shanghai, 2004 Patentee before: BAOWU CARBON MATERIAL TECHNOLOGY Co.,Ltd. |
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