CN104694146A - Flashing and pressure holding combined retention tower electric tracing heating temperature holding modified pitch production technology - Google Patents
Flashing and pressure holding combined retention tower electric tracing heating temperature holding modified pitch production technology Download PDFInfo
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- CN104694146A CN104694146A CN201510163646.6A CN201510163646A CN104694146A CN 104694146 A CN104694146 A CN 104694146A CN 201510163646 A CN201510163646 A CN 201510163646A CN 104694146 A CN104694146 A CN 104694146A
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- pitch
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10C—WORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID
- C10C3/00—Working-up pitch, asphalt, bitumen
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10C—WORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID
- C10C3/00—Working-up pitch, asphalt, bitumen
- C10C3/002—Working-up pitch, asphalt, bitumen by thermal means
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- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Civil Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
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- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
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- Thermal Sciences (AREA)
- Working-Up Tar And Pitch (AREA)
Abstract
The invention relates to a flashing and pressure holding combined retention tower electric tracing heating temperature holding modified pitch production technology. The production technology is a single-heat production technology, only one tube furnace is adopted for heating in the process, energy-saving effect is remarkable, and flashing separation and continuous heating temperature holding thermal polymerization are combined. Flashing separation is conducted firstly on pitch, then oxidization thermal polymerization is conducted by controlling electric heating temperature holding accurately, an obtained target product meets the requirement of the carbon industry for pitch better, cohesiveness is excellent during mixed kneading of a carbon element mixture, and coking value is higher after roasting.
Description
Technical field
The present invention relates to modified pitch production technical field, be specifically related to a kind of flash distillation and hold the technique that warm modified pitch is held in pressure combination delay tower electricity companion heating.
Background technology
Hard pitch and modified pitch take mid-temperature pitch as raw material, obtains through respective handling.Be that the production method of raw material production modified pitch mainly contains oxidation thermal polymerization method, normal pressure thermal polymerization method, pressurization thermal polymerization method, vacuum flashing method etc. with pitch.In existing technique, raw tar is through ultracentrifuge centrifugation, removing coal ash dust, dehydrated tar groove is entered after uncombined carbon and water, the dehydrated tar obtained by raw tar pump extract out with interchanger carry out media for heat exchange to 180 ~ 190 DEG C after enter dehydration tower, obtain dewatering to less than 0.2% anhydrous tar enter tube furnace convection zone and be heated to about 280 DEG C and enter cut tower, due to asphalt component, at high temperature excessively crosslinking polymerization and uneven part of being heated can be mild coking, the pitch of extraction at the bottom of cut tower obtains the mid-temperature pitch product of general quality after anhydrous tar/asphalt exchanger heat exchange, and pitch adopts steam heating in transmission and standing process, the mode that temperature is held in this heating is difficult to meet the requirement that pitch keeps more than 300 DEG C temperature.
Summary of the invention
The object of the invention is the deficiency for solving the problems of the technologies described above, there is provided a kind of flash distillation to hold pressure and combine the technique that warm modified pitch is held in delay tower electricity companion heating, this production technique is for once to heat production technique, in technological process, only use a tube furnace to heat, energy-saving effect is obvious, pitch flash separation and laser heating is held warm polymerization technique and combines.First flash separation is carried out to pitch, hold temperature through accurate control electrically heated again and carry out heat of oxidation polymerization, obtain target product and be more suitable for the requirement of carbon industry to pitch, particularly possess good cohesiveness when charcoal element compound kneading, after roasting, possess higher coking value.
The present invention is the deficiency solved the problems of the technologies described above, and the technical scheme adopted is: a kind of flash distillation is held pressure and combined the technique that warm modified pitch is held in delay tower electricity companion heating, comprises the following steps:
1), by stirring after raw tar and solvent all and, all with after tar carry out weight Component seperation through the de-pulp pump feeding ultracentrifuge that dewaters, isolated weight component enters light constituent storage tank and heavy constituent storage tank respectively;
2), by light constituent or heavy constituent enter dehydrated tar groove by pump extraction, then after the extraction of dehydrated tar groove and tar preheater, two contaminated product condensers, washing oil water cooler and the heat exchange of washing oil condenser, be heated to 180 ~ 190 DEG C by feedstock pump and enter in the middle part of dehydration tower; Wherein, tar preheater only uses when going into operation;
3a), after dehydration tower tower reactor anhydrous tar is heated to 220 ~ 230 DEG C after delivering to tar/carbolineum interchanger, pitch/anhydrous tar circulation heat exchanger heat exchange by tar recycle pump, get back to dehydration tower tower reactor, bottom temperature controls at 200 ~ 210 DEG C, dewater to less than 0.2% tar after pitch/anhydrous tar extracts interchanger A out and pitch/anhydrous tar extracts interchanger B heating out, enter the pitch heat exchange to 250 DEG C of fraction tower bottom with circulation after enter in the middle part of fraction tower;
3b), the isolated pitch of fraction tower bottom, deliver to after pitch/anhydrous tar extracts interchanger B and pitch/anhydrous tar circulation heat exchanger heat exchange out through pitch recycle pump and deliver to diamond heating, be heated to the most of pitch after 380 ~ 390 DEG C get back at the bottom of fraction tower and circulate, sub-fraction enters flash oil tower as extraction, flash oil tower bottom discharge port is connected to pitch and is detained tower, pitch carries out thermal polycondensation upgrading in delay tower, and the top that the top of flash oil tower and pitch are detained tower is connected, pitch is detained tower and carries out heat supply by electric heating companion device, electric heating companion device comprises the electric-heating belt and the temperature controlling system that are wrapped in pitch and are detained tower outside, pitch after upgrading is extracted out from delay tower bottom by modified pitch pump, extract out in interchanger A at pitch/anhydrous tar and enter the high groove of putting of pitch after heat exchange and to take out or shaping, described temperature controlling system comprises the power supply unit that the multiple temperature probe laid along electric-heating belt length direction and the temperature controller that multiple temperature probe all connects connect with electric-heating belt and the temperature controlled switch be serially connected between power supply unit and electric-heating belt in current supply circuit, and temperature controlled switch is undertaken controlling by temperature controller and it connects with temperature controller.
Solvent in described step 1) be light oil, washing oil or light oil and washing oil arbitrarily than mixed solvent, and the add-on of solvent is the 15%-20% of raw tar weight.
Centrifugal force in described step 1) during centrifugation is 3000G, centrifugation 1-5min.
After the centrifugation of described step 1) Raw tar, the quinoline insolubles content of heavy constituent tar is greater than 1%, the quinoline insolubles content of light constituent tar be less than 1% be light constituent.
Described step 2) in enter dehydrated tar groove raw tar when being light constituent tar, step 3b) asphaltic products. that obtains is high-quality asphalt.
Described step 2) in enter dehydrated tar groove raw tar when being heavy constituent tar, step 3b) asphaltic products. that obtains is common modified pitch.
Described fraction tower is vacuum still.
beneficial effect
Production Process for Modified Pitch of the present invention is for once to heat production technique, and in technological process, only use a tube furnace to heat, energy-saving effect is obvious, pitch flash separation and laser heating is held warm polymerization technique and combines.First flash separation is carried out to pitch, hold temperature through accurate control electrically heated again and carry out heat of oxidation polymerization, obtain target product and be more suitable for the requirement of carbon industry to pitch, particularly possess good cohesiveness when charcoal element compound kneading, after roasting, possess higher coking value.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of Production Process for Modified Pitch of the present invention;
Reference numeral: 1, raw tar storage tank, 2, dehydration tower, 3, fraction tower, 4, tar preheater, 5, pitch/anhydrous tar extracts interchanger A out, and 6, pitch/circulation tar heat exchanger, 7, tube furnace, 8, flash oil tower, 9, pitch is detained tower, 10, pitch is high puts groove, and 11, pitch/anhydrous tar extracts interchanger B out, and 12, light constituent storage tank, 13, heavy constituent storage tank, 14, two contaminated product condensers, 15, washing oil water cooler, 16, washing oil condenser.
Embodiment
As shown in the figure: a kind of flash distillation is held pressure and combined the technique that warm modified pitch is held in delay tower electricity companion heating, comprises the following steps:
1) stir with solvent after, raw tar being extracted out by raw tar storage tank 1 equal and, all with after tar through dewater de-pulp pump send into ultracentrifuge carry out weight Component seperation, isolated weight component enters light constituent storage tank 12 and heavy constituent storage tank 13 respectively;
Solvent in described step 1) be light oil, washing oil or light oil and washing oil arbitrarily than mixed solvent, and the add-on of solvent is the 15%-20% of raw tar weight.
Centrifugal force in described step 1) during centrifugation is 3000G, centrifugation 1-5min.
After the centrifugation of described step 1) Raw tar, the quinoline insolubles content of heavy constituent tar is greater than 1%, the quinoline insolubles content of light constituent tar be less than 1% be light constituent.
2), by light constituent or heavy constituent enter dehydrated tar groove by pump extraction, then after the extraction of dehydrated tar groove and tar preheater 4, two contaminated product condenser 14, washing oil water cooler 15 and washing oil condenser 16 heat exchange, be heated to 180 ~ 190 DEG C by feedstock pump and enter in the middle part of dehydration tower 2; Wherein, tar preheater 4 only uses when going into operation;
3a), after dehydration tower 2 tower reactor anhydrous tar is heated to 220 ~ 230 DEG C after delivering to tar/carbolineum interchanger, pitch/anhydrous tar circulation heat exchanger 6 heat exchange by tar recycle pump, get back to dehydration tower 2 tower reactor, bottom temperature controls at 200 ~ 210 DEG C, dewater to less than 0.2% tar after pitch/anhydrous tar extracts interchanger A5 out and pitch/anhydrous tar extracts interchanger B11 heating out, enter the pitch heat exchange to 250 DEG C of fraction tower bottom with circulation after enter in the middle part of fraction tower 3;
3b), isolated pitch bottom fraction tower 3, deliver to through pitch recycle pump and deliver to tube furnace 7 after pitch/anhydrous tar extracts interchanger B11 and pitch/anhydrous tar circulation heat exchanger 6 heat exchange out and heat, be heated to the most of pitch after 380 ~ 390 DEG C get back to fraction tower 3 end and circulate, sub-fraction enters flash oil tower 8 as extraction, flash oil tower 8 bottom discharge mouth is connected to pitch and is detained tower 9, pitch carries out thermal polycondensation upgrading in delay tower 9, and the top that the top of flash oil tower 8 and pitch are detained tower 9 is connected, pitch is detained tower 9 and carries out heat supply by electric heating companion device, electric heating companion device comprises the electric-heating belt and the temperature controlling system that are wrapped in pitch and are detained tower 9 outside, pitch after upgrading is extracted out from delay tower bottom by modified pitch pump, extract out in interchanger A at pitch/anhydrous tar and enter the high groove of putting of pitch after heat exchange and to take out or shaping, described temperature controlling system comprises the power supply unit that the multiple temperature probe laid along electric-heating belt length direction and the temperature controller that multiple temperature probe all connects connect with electric-heating belt and the temperature controlled switch be serially connected between power supply unit and electric-heating belt in current supply circuit, and temperature controlled switch is undertaken controlling by temperature controller and it connects with temperature controller.Described step 2) in enter dehydrated tar groove raw tar when being light constituent tar, step 3b) asphaltic products. that obtains is high-quality asphalt.
Described step 2) in enter dehydrated tar groove raw tar when being heavy constituent tar, step 3b) asphaltic products. that obtains is common modified pitch.
Production Process for Modified Pitch of the present invention, holds warm polymerization technique by pitch flash separation and laser heating and combines.First flash separation is carried out to pitch, hold temperature through accurate control electrically heated again and carry out heat of oxidation polymerization, obtain target product and be more suitable for the requirement of carbon industry to pitch, particularly possess good cohesiveness when charcoal element compound kneading, after roasting, possess higher coking value.
Claims (7)
1. flash distillation is held pressure and is combined the technique that warm modified pitch is held in delay tower electricity companion heating, it is characterized in that: comprise the following steps:
1), by stirring after raw tar and solvent all and, all with after tar carry out weight Component seperation through the de-pulp pump feeding ultracentrifuge that dewaters, isolated weight component enters light constituent storage tank and heavy constituent storage tank respectively;
2), by light constituent or heavy constituent enter dehydrated tar groove by pump extraction, then after the extraction of dehydrated tar groove and tar preheater, two contaminated product condensers, washing oil water cooler and the heat exchange of washing oil condenser, be heated to 180 ~ 190 DEG C by feedstock pump and enter in the middle part of dehydration tower; Wherein, tar preheater only uses when going into operation;
3a), after dehydration tower tower reactor anhydrous tar is heated to 220 ~ 230 DEG C after delivering to tar/carbolineum interchanger, pitch/anhydrous tar circulation heat exchanger heat exchange by tar recycle pump, get back to dehydration tower tower reactor, bottom temperature controls at 200 ~ 210 DEG C, dewater to less than 0.2% tar after pitch/anhydrous tar extracts interchanger A out and pitch/anhydrous tar extracts interchanger B heating out, enter the pitch heat exchange to 250 DEG C of fraction tower bottom with circulation after enter in the middle part of fraction tower;
3b), the isolated pitch of fraction tower bottom, deliver to after pitch/anhydrous tar extracts interchanger B and pitch/anhydrous tar circulation heat exchanger heat exchange out through pitch recycle pump and deliver to diamond heating, be heated to the most of pitch after 380 ~ 390 DEG C get back at the bottom of fraction tower and circulate, sub-fraction enters flash oil tower as extraction, flash oil tower bottom discharge port is connected to pitch and is detained tower, pitch carries out thermal polycondensation upgrading in delay tower, and the top that the top of flash oil tower and pitch are detained tower is connected, pitch is detained tower and carries out heat supply by electric heating companion device, electric heating companion device comprises the electric-heating belt and the temperature controlling system that are wrapped in pitch and are detained tower outside, pitch after upgrading is extracted out from delay tower bottom by modified pitch pump, extract out in interchanger A at pitch/anhydrous tar and enter the high groove of putting of pitch after heat exchange and to take out or shaping, described temperature controlling system comprises the power supply unit that the multiple temperature probe laid along electric-heating belt length direction and the temperature controller that multiple temperature probe all connects connect with electric-heating belt and the temperature controlled switch be serially connected between power supply unit and electric-heating belt in current supply circuit, and temperature controlled switch is undertaken controlling by temperature controller and it connects with temperature controller.
2. a kind of flash distillation as claimed in claim 1 is held pressure and is combined the technique that warm modified pitch is held in delay tower electricity companion heating, it is characterized in that: the solvent in described step 1) be light oil, washing oil or light oil and washing oil arbitrarily than mixed solvent, and the add-on of solvent is the 15%-20% of raw tar weight.
3. a kind of flash distillation as claimed in claim 1 is held pressure and is combined the technique that warm modified pitch is held in delay tower electricity companion heating, it is characterized in that: the centrifugal force in described step 1) during centrifugation is 3000G, centrifugation 1-5min.
4. a kind of flash distillation as claimed in claim 1 is held pressure and is combined the technique that warm modified pitch is held in delay tower electricity companion heating, it is characterized in that: after the centrifugation of described step 1) Raw tar, the quinoline insolubles content of heavy constituent tar is greater than 1%, the quinoline insolubles content of light constituent tar be less than 1% be light constituent.
5. a kind of flash distillation as claimed in claim 1 is held pressure and is combined the technique that warm modified pitch is held in delay tower electricity companion heating, it is characterized in that: described step 2) in enter dehydrated tar groove raw tar when being light constituent tar, step 3b) asphaltic products. that obtains is high-quality asphalt.
6. a kind of flash distillation as claimed in claim 1 is held pressure and is combined the technique that warm modified pitch is held in delay tower electricity companion heating, it is characterized in that: described step 2) in enter dehydrated tar groove raw tar when being heavy constituent tar, step 3b) asphaltic products. that obtains is common modified pitch.
7. a kind of flash distillation as claimed in claim 1 is held pressure and is combined the technique that warm modified pitch is held in delay tower electricity companion heating, it is characterized in that: described fraction tower is vacuum still.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510163646.6A CN104694146B (en) | 2015-04-09 | 2015-04-09 | A kind of flash distillation is held pressure and combines the technique for being detained that tower electricity holds warm modified coal tar pitch with heating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510163646.6A CN104694146B (en) | 2015-04-09 | 2015-04-09 | A kind of flash distillation is held pressure and combines the technique for being detained that tower electricity holds warm modified coal tar pitch with heating |
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| Publication Number | Publication Date |
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| CN104694146A true CN104694146A (en) | 2015-06-10 |
| CN104694146B CN104694146B (en) | 2017-03-15 |
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| CN201510163646.6A Active CN104694146B (en) | 2015-04-09 | 2015-04-09 | A kind of flash distillation is held pressure and combines the technique for being detained that tower electricity holds warm modified coal tar pitch with heating |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101126027A (en) * | 2006-08-17 | 2008-02-20 | 戴惠筠 | Method for preparing coal series needle coke |
| CN201386075Y (en) * | 2009-03-30 | 2010-01-20 | 旭阳控股有限公司 | Multi-variety asphalt production device |
| CN103059892A (en) * | 2013-01-25 | 2013-04-24 | 兖矿科蓝煤焦化有限公司 | Tar distillation process for directly producing modified pitch |
| CN103113908A (en) * | 2013-01-30 | 2013-05-22 | 陕西煤业化工技术研究院有限责任公司 | Coal-based needle coke preparation process |
| CN103756704A (en) * | 2014-01-22 | 2014-04-30 | 鞍山兴德工程技术有限公司 | System for producing modified coal tar pitch and preparation method thereof |
-
2015
- 2015-04-09 CN CN201510163646.6A patent/CN104694146B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101126027A (en) * | 2006-08-17 | 2008-02-20 | 戴惠筠 | Method for preparing coal series needle coke |
| CN201386075Y (en) * | 2009-03-30 | 2010-01-20 | 旭阳控股有限公司 | Multi-variety asphalt production device |
| CN103059892A (en) * | 2013-01-25 | 2013-04-24 | 兖矿科蓝煤焦化有限公司 | Tar distillation process for directly producing modified pitch |
| CN103113908A (en) * | 2013-01-30 | 2013-05-22 | 陕西煤业化工技术研究院有限责任公司 | Coal-based needle coke preparation process |
| CN103756704A (en) * | 2014-01-22 | 2014-04-30 | 鞍山兴德工程技术有限公司 | System for producing modified coal tar pitch and preparation method thereof |
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| CN104694146B (en) | 2017-03-15 |
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Inventor after: Li Mao Inventor after: Zhou Wensheng Inventor after: Ai Humin Inventor after: Zhou Yunhui Inventor after: Zhao Bin Inventor after: Guan Jiuxia Inventor before: Ai Humin Inventor before: Zhou Yunhui Inventor before: Zhao Bin Inventor before: Guan Jiuxia |
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Effective date of registration: 20170208 Address after: 452670 Ziyun City, Xuchang province Xiangcheng County town of Liu Village Applicant after: Henan Kai Tan novel material company limited Applicant after: China Pingmei Shenma Energy Chemical Group Co., Ltd. Address before: 452670 Ziyun City, Xuchang province Xiangcheng County town of Liu Village Applicant before: Henan Kai Tan novel material company limited |
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Address after: 461700 intersection of Kaiyuan Road and Qizi Road, Ziyun Town, Xiangcheng County, Xuchang City, Henan Province Patentee after: Henan Shoucheng technology new material Co.,Ltd. Patentee after: CHINA PINGMEI SHENMA ENERGY CHEMICAL GROUP Co.,Ltd. Address before: 452670 Po Liu Cun, Ziyun Town, Xiangcheng County, Xuchang City, Henan Province Patentee before: HENAN KAITAN NEW MATERIAL Co.,Ltd. Patentee before: CHINA PINGMEI SHENMA ENERGY CHEMICAL GROUP Co.,Ltd. |
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