CN102311747A - Furnace-kettle type modified pitch production system and production process - Google Patents
Furnace-kettle type modified pitch production system and production process Download PDFInfo
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- CN102311747A CN102311747A CN201110252718A CN201110252718A CN102311747A CN 102311747 A CN102311747 A CN 102311747A CN 201110252718 A CN201110252718 A CN 201110252718A CN 201110252718 A CN201110252718 A CN 201110252718A CN 102311747 A CN102311747 A CN 102311747A
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Abstract
Provided is a furnace-kettle type modified pitch production system. According to the system, a pitch storage tank, a raw material pump, a tube heating furnace, a flash evaporation tower, a reaction vessel A, a reaction vessel B and a reaction vessel C are in sequential series connection, the reaction vessel C is in series connection with a modified pitch intermediate tank and a modified pitch pump to form a cycle, and the modified pitch intermediate tank communicates with a modified pitch finished product tank and the pitch storage tank through the modified pitch pump. According to the invention, temperature of the outlet of the tube heating furnace and all the reaction vessels can be agilely adjusted so as to realize regulation of toluene insoluble substances (TI) and quinoline insoluble substances (QI) in pitch; TI and QI values of produced modified pitch are not affected by TI and QI values of the raw material coal tar, thereby realizing adjustable control of the TI and QI values of modified pitch; a production process for the modified pitch is simple, is easy to operate and control, enables a part of a naphthalene product to be recovered and has the advantages of small investment and good benefits, and the production system is applicable to construction of supporting equipment of newly-constructed coal tar processing apparatuses and reconstruction of old apparatuses.
Description
Technical field
The invention belongs to coal-tar pitch processing and utilization field, relate to the preparation method of modified pitch.
Background technology
Modified pitch is production anode mix, anode carbon block, Graphite Electrodes, and the important source material of other carbon products; Excellent properties such as have that adhesive property is good, electroconductibility is strong, electrode oxidation-resistance and thermal stability are good, modified pitch generally replaces the sticker that mid-temperature pitch is used as carbon product at present.
Along with the development of big volume superpower direct current electric arc furnace and large-scale aluminum electrolytic cell, large size ultra-high power graphite electrode and superpower electrode and pre-baked anode carbon blocks are had higher requirement, the quality of sticker modified pitch is also had higher requirement.
The working method of modified pitch mainly contains vacuum flashing method, normal pressure thermal polymerization method and pressurization thermal polymerization method at present.But above-mentioned several kinds of methods of producing modified pitch more or less have a following problems:
(1) treated modified pitch, the requirement though quinoline insolubles can be up to state standards, softening temperature is too high, is difficult to satisfy the needs of the high-power Graphite Electrodes of producing National standard;
(2) modified pitch QI (quinoline insolubles), that TI (pitch toluene insolubles) value is influenced by raw material is bigger, change with coal tar QI, TI value;
(3) above-mentioned complex process, equipment requirements is higher, and matter bituminous quality instability is whenever corrected in not easy to operate and control.
Summary of the invention
Technical problem to be solved by this invention provides a kind of stove-still formula modified pitch working method, with the quality of production stable satisfy the high-quality modified pitch that large size ultra-high power graphite electrode and raw material of wood-charcoal material such as superpower electrode and pre-baked anode carbon blocks are used.
Adopt following technical scheme in order to solve the problems of the technologies described above: a kind of stove-still formula modified pitch production system; Asphalt reservior, feedstock pump, tubular oven, flashing tower, reaction kettle A, reaction kettle B, reaction kettle C connect successively; Reaction kettle C and modified pitch medial launder, modified pitch series connection of pumps form circulation, and the modified pitch medial launder also is communicated with modified pitch pan tank and asphalt reservior respectively through the modified pitch pump.
Described feedstock pump is two feedstock pumps that are set up in parallel; The modified pitch pump is two modified pitch pumps that parallel connection is provided with.
Asphalt reservior is communicated with through feedstock pump and tubular oven middle part, and tubular oven bottom and flashing tower bottom are communicated with, and the top of flashing tower bottom and reaction kettle A is communicated with, and reaction kettle A bottom and reaction kettle B top are communicated with, and reaction kettle B bottom and reaction kettle C top are communicated with.
The top of reaction kettle A, reaction kettle B, reaction kettle C all is communicated with the flash oil water cooler, flash oil water cooler and the series connection of flash distillation oil groove; The flashing tower top is communicated with the spray column middle and lower part, connects with oil cooler, circulating oil tank, circulating oil pump at the bottom of the tower in the spray column bottom, and circulating oil pump is communicated with the formation circulation with spray column top, and circulating oil tank is communicated with the distilled oil storage tank; Connect with vaporization and condensation water cooler, tar storage tank in the spray column top, oil cooler also is communicated with the tar storage tank at the bottom of the tower; Circulating oil tank also is communicated with reaction kettle C top through circulating oil pump.
Unshunted two circulating oil pumps of described circulating oil pump.
Production technique is following: temperature is that 200-350 ℃, softening temperature are that 30-50 ℃ viscid bitumen or preparation viscid bitumen extracted out from asphalt reservior by feedstock pump, and a part is as the raw material of producing other products, and a part gets into tubular oven and is heated to 380-430 ℃; Get into flashing tower then and remove light constituent; Pitch gets into reaction kettle A, reaction kettle B and reaction kettle C successively by the flashing tower bottom and carries out the thermopolymerization processing, allocates oil product into, obtains modified pitch; Modified pitch is from flowing into the modified pitch medial launder; The modified pitch pump is extracted modified pitch out from the modified pitch medial launder, a part gets into the modified pitch pan tank, and a part gets among the reaction kettle C as reflux cycle.
After autoreaction still A, reaction kettle B and reaction kettle C top escaping gas got into the cooling of flash oil water cooler, the gained flash oil got into the flash distillation oil groove; Light constituent flash of steam in flashing tower; Get into the spray column middle and lower part by the flashing tower top; In spray column, directly contact with the cat head spray liquid, part be condensed and the tower of flowing through certainly at the bottom of oil cooler, cooling back gets into circulating oil tank; Part spray liquid is squeezed into the spray column top as turning oil by circulating oil pump, and a part is squeezed among the reaction kettle C by circulating oil pump as oil product; The gas that the spray cat head is not condensed gets into the vaporization and condensation water cooler, and the back that is cooled is from flowing into the tar storage tank, and 210-225 ℃ of control spray column head temperature obtains being rich in the naphtalene oil article, after the cooling of vaporization and condensation water cooler, flows into certainly in the tar storage tank.
Flashing tower is a 3-7 layer dividing plate, catches the mist layer for 1 layer, and material is the 00Cr17Ni14Mo2 steel; Spray column is a metal structured packing, bed stuffing height 5-10m; Flashing tower empty tower gas velocity 0.5-1.0m/s; Spray column empty tower gas velocity 0.5-1.2m/s; 365-400 ℃ of flash distillation column bottom temperature; The temperature of reaction kettle A, reaction kettle B, reaction kettle C is 360-400 ℃; 320-260 ℃ of flash distillation tower top temperature.
The present invention can adjust tubular oven temperature out and each temperature of reaction kettle flexibly, and pitch toluene insolubles (TI) and quinoline insolubles (QI) are adjusted; The modified pitch TI and the QI value of producing are not influenced by feed coal tar TI and QI value, have realized that modified pitch TI and QI value are adjustable controlled; Technology is simple, is easy to operate and control, and recyclable part naphthalene product, less investment, profitable, be applicable to newly-built coal tar processing unit (plant) auxiliary construction and old plant modification.
Description of drawings
Fig. 1 is a system flowchart of the present invention.
Reference numeral: 1, asphalt reservior, 2A, feedstock pump, 2B, feedstock pump.3, tubular oven, 4, flashing tower, 5A, reaction kettle A, 5B, reaction kettle, 5C, reaction kettle; 6, modified pitch medial launder, 7A, modified pitch pump, 7B, modified pitch pump, 8, the modified pitch pan tank, 9, the flash oil water cooler; 10, flash distillation oil groove, 11, spray column, 12, oil cooler at the bottom of the tower, 13, circulating oil tank, 14A, circulating oil pump; 14B, circulating oil pump, 15, the distilled oil storage tank, 16, the tar storage tank, 17, the vaporization and condensation water cooler.
Specific embodiments
Specify embodiment of the present invention below in conjunction with accompanying drawing 1.
As shown in Figure 1; A kind of stove-still formula modified pitch production system; Asphalt reservior 1, feedstock pump 2, tubular oven 3, flashing tower 4, reaction kettle A 5a, reaction kettle B 5b, reaction kettle C 5c connect successively; Reaction kettle C 5c and modified pitch medial launder 6,7 series connection of modified pitch pump form circulation, and modified pitch medial launder 6 also is communicated with modified pitch pan tank 8 and asphalt reservior 1 respectively through modified pitch pump 7.Asphalt reservior 1 is communicated with through feedstock pump 2 and tubular oven 3 middle parts; Tubular oven 3 bottoms and flashing tower 4 bottoms are communicated with; The top of flashing tower 4 bottoms and reaction kettle A 5a is communicated with; Reaction kettle A 5a bottom and reaction kettle B 5b top are communicated with, and reaction kettle B 5b bottom and reaction kettle C 5c top are communicated with.The top of reaction kettle A, reaction kettle B, reaction kettle C all is communicated with flash oil water cooler 9, flash oil water cooler 9 and 10 series connection of flash distillation oil groove; Flashing tower 4 tops are communicated with spray column 11 middle and lower parts, connect with oil cooler at the bottom of the tower 12, circulating oil tank 13, circulating oil pump 14 in spray column 11 bottoms, and circulating oil pump 14 is communicated with the formation circulation with spray column 11 tops, and circulating oil tank 13 is communicated with distilled oil storage tank 15; Connect with vaporization and condensation water cooler 17, tar storage tank 16 in spray column 11 tops, oil cooler 12 also is communicated with tar storage tank 16 at the bottom of the tower; Circulating oil tank 13 also is communicated with reaction kettle C 5c top through circulating oil pump 14.
Two feedstock pump 2As, the 2B of described feedstock pump 2 for being set up in parallel, the modified pitch pump is two modified pitch pump 7A, the 7B that parallel connection is provided with, unshunted two the circulating oil pump 14A of circulating oil pump, 14B.
Production technique is following: temperature is that 200-350 ℃, softening temperature are that 30-50 ℃ viscid bitumen or preparation viscid bitumen extracted out from asphalt reservior by feedstock pump, and a part is as the raw material of producing other products, and a part gets into tubular oven and is heated to 380-430 ℃; Get into flashing tower then and remove light constituent; Pitch gets into reaction kettle A, reaction kettle B and reaction kettle C successively by flashing tower bottom to carry out thermopolymerization and handles, and TI component in the pitch and QI component are adjusted, and (oil product is a flash oil in the end to allocate an amount of oil product among reaction kettle 5C; Be mainly the polycyclic organic compound thing); The adjustment pitch softening point mixes to 100-115 ℃, obtains modified pitch; Modified pitch is from flowing into the modified pitch medial launder; The modified pitch pump is extracted modified pitch out from the modified pitch medial launder, a part gets into the modified pitch pan tank, and a part gets among the reaction kettle C as reflux cycle.After autoreaction still A, reaction kettle B and reaction kettle C top escaping gas got into the cooling of flash oil water cooler, the gained flash oil got into the flash distillation oil groove; Light constituent flash of steam in flashing tower; Get into the spray column middle and lower part by the flashing tower top; In spray column, directly contact with the cat head spray liquid, part be condensed and the tower of flowing through certainly at the bottom of oil cooler, cooling back gets into circulating oil tank; Part spray liquid is squeezed into the spray column top as turning oil by circulating oil pump, and a part is squeezed among the reaction kettle C by circulating oil pump as oil product; The gas that the spray cat head is not condensed gets into the vaporization and condensation water cooler; Be cooled the back from flowing into the tar storage tank, and 210-225 ℃ of control spray column head temperature obtains being rich in the naphtalene oil article; After the cooling of vaporization and condensation water cooler; In flowing into the tar storage tank,, join to reclaim in the tar distillation operation raw material and extract NAPTHALENE FLAKES. (INDUSTRIAL GRADE.
Flashing tower is a 3-7 layer dividing plate, catches the mist layer for 1 layer, and material is the 00Cr17Ni14Mo2 steel; Spray column is a metal structured packing, bed stuffing height 5-10m; Flashing tower empty tower gas velocity 0.5-1.0m/s; Spray column empty tower gas velocity 0.5-1.2m/s; 365-400 ℃ of flash distillation column bottom temperature; The temperature 360-400 of reaction kettle A, B, C ℃; 320-260 ℃ of flash distillation tower top temperature.
Claims (8)
1. stove-still formula modified pitch production system; It is characterized in that: asphalt reservior, feedstock pump, tubular oven, flashing tower, reaction kettle A, reaction kettle B, reaction kettle C connect successively; Reaction kettle C and modified pitch medial launder, modified pitch series connection of pumps form circulation, and the modified pitch medial launder also is communicated with modified pitch pan tank and asphalt reservior respectively through the modified pitch pump.
2. stove according to claim 1-still formula modified pitch production system is characterized in that: described feedstock pump is two feedstock pumps that are set up in parallel; The modified pitch pump is two modified pitch pumps that parallel connection is provided with.
3. stove according to claim 1-still formula modified pitch production system; It is characterized in that: asphalt reservior is communicated with through feedstock pump and tubular oven middle part; Tubular oven bottom and flashing tower bottom are communicated with; The top of flashing tower bottom and reaction kettle A is communicated with, and reaction kettle A bottom and reaction kettle B top are communicated with, and reaction kettle B bottom and reaction kettle C top are communicated with.
4. stove according to claim 1-still formula modified pitch production system, it is characterized in that: the top of reaction kettle A, reaction kettle B, reaction kettle C all is communicated with the flash oil water cooler, flash oil water cooler and the series connection of flash distillation oil groove; The flashing tower top is communicated with the spray column middle and lower part, connects with oil cooler, circulating oil tank, circulating oil pump at the bottom of the tower in the spray column bottom, and circulating oil pump is communicated with the formation circulation with spray column top, and circulating oil tank is communicated with the distilled oil storage tank; Connect with vaporization and condensation water cooler, tar storage tank in the spray column top, oil cooler also is communicated with the tar storage tank at the bottom of the tower; Circulating oil tank also is communicated with reaction kettle C top through circulating oil pump.
5. stove according to claim 4-still formula modified pitch production system is characterized in that: unshunted two circulating oil pumps of described circulating oil pump.
6. stove according to claim 1-still formula modified pitch production system; It is characterized in that production technique is following: temperature is that 200-350 ℃, softening temperature are that 30-50 ℃ viscid bitumen or preparation viscid bitumen extracted out from asphalt reservior by feedstock pump, and a part is as the raw material of producing other products, and a part gets into tubular oven and is heated to 380-430 ℃; Get into flashing tower then and remove light constituent; Pitch gets into reaction kettle A, reaction kettle B and reaction kettle C successively by the flashing tower bottom and carries out the thermopolymerization processing, allocates oil product into, obtains modified pitch; Modified pitch is from flowing into the modified pitch medial launder; The modified pitch pump is extracted modified pitch out from the modified pitch medial launder, a part gets into the modified pitch pan tank, and a part gets among the reaction kettle C as reflux cycle.
7. stove according to claim 6-still formula modified pitch production system is characterized in that production technique is following: after autoreaction still A, reaction kettle B and reaction kettle C top escaping gas got into the cooling of flash oil water cooler, the gained flash oil got into the flash distillation oil groove; Light constituent flash of steam in flashing tower; Get into the spray column middle and lower part by the flashing tower top; In spray column, directly contact with the cat head spray liquid, part be condensed and the tower of flowing through certainly at the bottom of oil cooler, cooling back gets into circulating oil tank; Part spray liquid is squeezed into the spray column top as turning oil by circulating oil pump, and a part is squeezed among the reaction kettle C by circulating oil pump as oil product; The gas that the spray cat head is not condensed gets into the vaporization and condensation water cooler, and the back that is cooled is from flowing into the tar storage tank, and 210-225 ℃ of control spray column head temperature obtains being rich in the naphtalene oil article, after the cooling of vaporization and condensation water cooler, flows into certainly in the tar storage tank.
8. stove according to claim 7-still formula modified pitch production system is characterized in that production technique is following: flashing tower is a 3-7 layer dividing plate, catches the mist layer for 1 layer, and material is the 00Cr17Ni14Mo2 steel; Spray column is a metal structured packing, bed stuffing height 5-10m; Flashing tower empty tower gas velocity 0.5-1.0m/s; Spray column empty tower gas velocity 0.5-1.2m/s; 365-400 ℃ of flash distillation column bottom temperature; The temperature of reaction kettle A, reaction kettle B, reaction kettle C is 360-400 ℃; 320-260 ℃ of flash distillation tower top temperature.
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| CN201110252718A CN102311747A (en) | 2011-08-30 | 2011-08-30 | Furnace-kettle type modified pitch production system and production process |
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| CN201110252718A CN102311747A (en) | 2011-08-30 | 2011-08-30 | Furnace-kettle type modified pitch production system and production process |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103242879A (en) * | 2013-04-25 | 2013-08-14 | 新疆鑫联煤化工有限公司 | Production method of modified pitch |
| CN103525444A (en) * | 2013-10-18 | 2014-01-22 | 河南开炭新材料有限公司 | Intermediate-temperature modified pitch extracting device and intermediate-temperature modified pitch extracting process |
| CN103865556A (en) * | 2012-12-14 | 2014-06-18 | 上海宝钢化工有限公司 | Device and method for producing mesophase-free medium-temperature modified asphalt |
| CN104130792A (en) * | 2013-05-02 | 2014-11-05 | 山东宝舜化工科技有限公司 | Asphalt tubular furnace and technology for modifying asphalt by employing the asphalt tubular furnace |
| CN107057740A (en) * | 2017-06-20 | 2017-08-18 | 中冶焦耐(大连)工程技术有限公司 | A kind of Existing in Improved Pitch Production System |
| CN107245346A (en) * | 2017-06-20 | 2017-10-13 | 中冶焦耐(大连)工程技术有限公司 | A kind of Production Process for Modified Pitch |
| CN110305682A (en) * | 2019-06-17 | 2019-10-08 | 武城县鲁建筑路设备有限公司 | A kind of Dan Shuancang intermittent fuel and conduction oil composite heating pitch composite production device |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103865556A (en) * | 2012-12-14 | 2014-06-18 | 上海宝钢化工有限公司 | Device and method for producing mesophase-free medium-temperature modified asphalt |
| CN103865556B (en) * | 2012-12-14 | 2016-03-02 | 上海宝钢化工有限公司 | Device and method for producing mesophase-free medium-temperature modified asphalt |
| CN103242879A (en) * | 2013-04-25 | 2013-08-14 | 新疆鑫联煤化工有限公司 | Production method of modified pitch |
| CN104130792A (en) * | 2013-05-02 | 2014-11-05 | 山东宝舜化工科技有限公司 | Asphalt tubular furnace and technology for modifying asphalt by employing the asphalt tubular furnace |
| CN103525444A (en) * | 2013-10-18 | 2014-01-22 | 河南开炭新材料有限公司 | Intermediate-temperature modified pitch extracting device and intermediate-temperature modified pitch extracting process |
| CN103525444B (en) * | 2013-10-18 | 2015-02-25 | 河南开炭新材料有限公司 | Intermediate-temperature modified pitch extracting device and intermediate-temperature modified pitch extracting process |
| CN107057740A (en) * | 2017-06-20 | 2017-08-18 | 中冶焦耐(大连)工程技术有限公司 | A kind of Existing in Improved Pitch Production System |
| CN107245346A (en) * | 2017-06-20 | 2017-10-13 | 中冶焦耐(大连)工程技术有限公司 | A kind of Production Process for Modified Pitch |
| CN107245346B (en) * | 2017-06-20 | 2022-12-13 | 中冶焦耐(大连)工程技术有限公司 | Modified asphalt production process |
| CN110305682A (en) * | 2019-06-17 | 2019-10-08 | 武城县鲁建筑路设备有限公司 | A kind of Dan Shuancang intermittent fuel and conduction oil composite heating pitch composite production device |
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Application publication date: 20120111 |