CN212581810U - Multi-reaction-kettle parallel-connected tubular furnace heating method modified asphalt production system - Google Patents
Multi-reaction-kettle parallel-connected tubular furnace heating method modified asphalt production system Download PDFInfo
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- CN212581810U CN212581810U CN202021925046.1U CN202021925046U CN212581810U CN 212581810 U CN212581810 U CN 212581810U CN 202021925046 U CN202021925046 U CN 202021925046U CN 212581810 U CN212581810 U CN 212581810U
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Abstract
The utility model relates to a tubular furnace heating modified asphalt production system with multiple parallel reaction kettles, which comprises a primary reaction unit or comprises a primary reaction unit and a secondary reaction unit; a plurality of parallel reaction kettles are arranged in the primary reaction unit, and a plurality of parallel reaction kettles are arranged in the secondary reaction unit. The utility model discloses can effectively improve the handling capacity of a modification reaction and secondary modification reaction, and then improve the productivity of single production line, satisfy the supporting requirement of current tar device.
Description
Technical Field
The utility model relates to a modified asphalt production technical field especially relates to a parallelly connected tubular furnace heating method modified asphalt production system of many reation kettle
Background
About 50% -60% of asphalt is generally generated in the coal tar processing process, which belongs to a bulk product of tar processing, and the larger the processing scale is, the more the asphalt yield is. The modified asphalt is the main downstream product of the existing asphalt and is mainly used for producing prebaked anodes in the electrolytic aluminum industry to prepare battery rods or electrode binders.
At present, the production process of modified asphalt in domestic production mostly adopts a thermal polycondensation method, the thermal polycondensation method can be divided into a kettle type heating method and a tube furnace heating method according to the heating mode, and the utility model discloses only research is carried out to the tube furnace heating method. The production process of modified asphalt by tubular furnace heating method includes pressurized double-furnace double-kettle stripping flash evaporation process introduced from France, domestic normal-pressure or reduced-pressure double-furnace double-kettle stripping flash evaporation process, single-furnace single-kettle stripping flash evaporation process, etc.
The double-furnace double-kettle stripping flash evaporation process takes medium-temperature asphalt as a raw material, the asphalt is heated by a tubular heating furnace, and then modification reaction is carried out in a reaction kettle; the modification reaction is divided into a first modification reaction and a second modification reaction, and the two modification reactions can be normal pressure reaction, pressure reaction or pressure reduction reaction according to different requirements of products, and the modified asphalt product is obtained by flash evaporation and steam stripping of a stripping tower after the reaction. The double-furnace double-kettle stripping flash evaporation process has the advantages that two steps of reactions are adopted, the reaction temperature and the reaction time of each step are different, the purpose of the reaction is different, the generation amount of alpha-components and beta-components can be effectively controlled, and the product quality is controllable; in addition, the method for separating asphalt and oil products by adopting a stripping method is favorable for adjusting the softening point.
The single-furnace single-kettle stripping flash evaporation process also takes medium-temperature asphalt as a raw material, asphalt is heated in a tubular heating furnace, then the asphalt is reacted in a reaction kettle, and the modified asphalt is obtained by flash stripping in a stripping tower after the reaction; because the reaction is completed in one step, the product quality control of the single-furnace single-kettle stripping flash process is not flexible as the double-furnace double-kettle stripping flash process.
The modified asphalt production process by the tubular furnace heating method achieves the aim of asphalt modification according to the residence time and the reaction temperature of reactants of medium-temperature asphalt in a modified asphalt reaction kettle, the residence time is realized by controlling the volume of the reaction kettle, and the reaction temperature is ensured by a tubular heating furnace.
With the continuous increase of the single set of treatment capacity of the tar device (15 ten thousand t/a or 20 ten thousand t/a in the past, and 30 ten thousand t/a or 50 ten thousand t/a in the present), the traditional double-furnace double-kettle modified asphalt production process cannot meet the requirements only by a single production line, and the volume of the reaction kettle cannot be infinitely increased due to the retention time, so that the production of the modified asphalt by the tar processing device with 30 ten thousand t/a or 50 ten thousand t/a in the present stage is often required to be matched with two or even a plurality of modified asphalt production lines.
Two or even a plurality of modified asphalt production lines are adopted, so that the occupied area is large, the control system is complex, the number of operators is large, and the production cost is high; if a production line is adopted, a plurality of reaction kettles are arranged in each step of reaction process for parallel operation, and the problems can be solved by corresponding control process.
In summary, it is very necessary to improve the production process of the double-furnace double-kettle modified asphalt by the conventional tubular furnace heating method, and to increase the throughput of a single production line by parallel operation of a plurality of modified asphalt reaction kettles.
Disclosure of Invention
The utility model provides a parallelly connected tube furnace heating method of many reation kettle upgrading pitch production system establishes two or more reation kettle and carries out parallelly connected operation at single modification reaction in-process, can effectively improve the handling capacity of single modification reaction, and then improves the productivity of single production line, satisfies the supporting requirement of current tar device.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the system for producing the modified asphalt by the tubular furnace heating method with the multiple parallel reaction kettles comprises a primary reaction unit or a primary reaction unit and a secondary reaction unit; a plurality of parallel reaction kettles are arranged in the primary reaction unit, and a plurality of parallel reaction kettles are arranged in the secondary reaction unit.
The production system of the modified asphalt by a tubular furnace heating method with a plurality of parallel reaction kettles comprises a primary reaction unit and a secondary reaction unit; the primary reaction unit is internally provided with a # 1 tubular furnace, a # 1 reaction kettle A, a # 1 reaction kettle B, a # 1 modified asphalt circulating pump A and a # 1 modified asphalt circulating pump B; the secondary reaction unit is internally provided with a No. 2 tube furnace, a No. 2 reaction kettle A, a No. 2 reaction kettle B, a jet mixer A, a jet mixer B, a No. 2 modified asphalt circulating pump A and a No. 2 modified asphalt circulating pump B;
the top parts of the No. 1 reaction kettle A and the No. 1 reaction kettle B are both provided with flash evaporation oil gas outlets, the upper parts of the reaction kettles are both provided with asphalt inlets, and the bottom parts of the reaction kettles are both provided with primary modified asphalt outlets; the flash oil gas outlet of the No. 1 reaction kettle A and the flash oil gas outlet of the No. 1 reaction kettle B are respectively connected with an external normal pressure stripping tower through flash oil gas conveying pipelines; the No. 1 pipe furnace is provided with an asphalt inlet and an asphalt outlet, and the asphalt outlet of the No. 1 pipe furnace is connected with an asphalt return pipeline I and an asphalt return pipeline II through an asphalt outlet main pipe I; the first asphalt backflow pipeline is connected with an asphalt inlet of the No. 1 reaction kettle A, and the second asphalt backflow pipeline is connected with an asphalt inlet of the No. 1 reaction kettle B; the first asphalt return pipeline is connected with a raw material medium-temperature asphalt main pipe through a medium-temperature asphalt pipeline, and the second asphalt return pipeline is connected with the raw material medium-temperature asphalt main pipe through a medium-temperature asphalt pipeline; a 1# modified asphalt circulating pump A is arranged at a primary modified asphalt outlet of the 1# reaction kettle A; the primary modified asphalt outlet of the No. 1 reaction kettle A is connected with the asphalt inlet of the No. 1 tubular furnace through an asphalt returning pipeline I, and is connected with the jet mixer A in the secondary reaction unit through an asphalt conveying pipeline I; a 1# modified asphalt circulating pump B is arranged at a primary modified asphalt outlet of the 1# reaction kettle B; the primary modified asphalt outlet of the No. 1 reaction kettle B is connected with the asphalt inlet of the No. 1 tubular furnace through an asphalt returning pipeline II, and is connected with a jet mixer B in the secondary reaction unit through an asphalt conveying pipeline II;
the top parts of the 2# reaction kettle A and the 2# reaction kettle B are respectively provided with a flash evaporation oil gas outlet, the upper parts of the flash evaporation oil gas outlets are respectively provided with an asphalt inlet, and the bottom parts of the flash evaporation oil gas outlets are respectively provided with a secondary modified asphalt outlet; the flash oil gas outlet of the No. 2 reaction kettle A and the flash oil gas outlet of the No. 2 reaction kettle B are respectively connected with an external normal pressure stripping tower through flash oil gas conveying pipelines; the 2# tubular furnace is provided with an asphalt inlet and an asphalt outlet, and the asphalt outlet of the 2# tubular furnace is connected with an asphalt return pipeline III and an asphalt return pipeline IV through an asphalt outlet header pipe II; the third asphalt return pipeline is connected with an asphalt inlet of the 2# reaction kettle A, and the fourth asphalt return pipeline is connected with an asphalt inlet of the 2# reaction kettle B; a 2# modified asphalt circulating pump A is arranged at a secondary modified asphalt outlet of the 2# reaction kettle A; the secondary modified asphalt outlet of the No. 2 reaction kettle A is connected with the asphalt inlet of the No. 2 tube furnace through an asphalt returning pipeline III, a jet mixer A is arranged on the asphalt returning pipeline III, and the secondary modified asphalt outlet of the No. 2 reaction kettle A is connected with an asphalt delivery main pipeline through an asphalt delivery pipeline I; a 2# modified asphalt circulating pump B is arranged at a secondary modified asphalt outlet of the 2# reaction kettle B; the secondary modified asphalt outlet of the No. 2 reaction kettle B is connected with the asphalt inlet of the No. 2 tube furnace through an asphalt returning pipeline IV, a jet mixer B is arranged on the asphalt returning pipeline IV, and the secondary modified asphalt outlet of the No. 2 reaction kettle B is connected with an asphalt delivery main pipeline through an asphalt delivery pipeline II; and the asphalt delivery main pipeline is connected with a normal-pressure stripping tower.
A flow recording instrument FR05 is arranged on the first asphalt outlet header pipe, a flow recording proportion adjusting instrument FFRC06 and a first flow adjusting valve are arranged on the first asphalt return pipeline, and a second flow adjusting valve is arranged on the second asphalt return pipeline; and the flow recording instrument FR05, the flow recording proportion adjusting instrument FFRC06, the first flow adjusting valve and the second flow adjusting valve are controlled in a double-locking mode.
A flow recording and accumulating instrument FRQ01 is arranged on the raw material medium temperature asphalt main pipe, a flow recording proportion adjusting instrument FFRC02 and a flow adjusting valve III are arranged on the medium temperature asphalt branch pipe I, and a flow adjusting valve IV is arranged on the medium temperature asphalt branch pipe II; the flow recording and accumulating instrument FRQ01, the flow recording proportion adjusting instrument FFRC02, the flow adjusting valve III and the flow adjusting valve IV are controlled in a four-linkage mode.
The 1# reaction kettle A is provided with a weight recording control instrument WRC01A, the asphalt conveying pipeline I is provided with a weight recording regulating valve I, and the weight recording control instrument WRC01A and the weight recording regulating valve I are controlled in an interlocking manner; a flow recording and accumulating instrument FR03 is arranged on the first asphalt return pipeline; the No. 1 reaction kettle B is provided with a weight recording control instrument WRC01B, the second asphalt conveying pipeline is provided with a second weight recording adjusting valve, and the weight recording control instrument WRC01B and the weight recording adjusting valve are subjected to dual lock control; and a flow recording and accumulating instrument FR04 is arranged on the second asphalt return pipeline.
A flow recording instrument FR09 is arranged on the second asphalt outlet header pipe, a flow recording proportion adjusting instrument FFRC10 and a flow adjusting valve V are arranged on the third asphalt return pipeline, and a flow adjusting valve VI is arranged on the fourth asphalt return pipeline; and the flow recording instrument FR09, the flow recording proportion adjusting instrument FFRC10, the flow regulating valve five and the flow regulating valve six are controlled in an interlocking manner.
The 2# reaction kettle A is provided with a weight recording control instrument WRC02A, a weight recording adjusting valve III on the asphalt delivery pipeline I, and a weight recording control instrument WRC02A and the weight recording adjusting valve are controlled in a triple lock mode; a flow recording instrument FR07 is arranged on the first mixed asphalt pipeline; the 2# reaction kettle B is provided with a weight recording control instrument WRC02B, the second asphalt delivery pipeline is provided with a weight recording regulating valve IV, and the weight recording control instrument WRC02B and the weight recording regulating valve IV are controlled in a four-linkage mode; and a flow recording instrument FR08 is arranged on the first mixed asphalt pipeline.
Compared with the prior art, the beneficial effects of the utility model are that:
1) in the single modification reaction process (the single-furnace single-kettle stripping flash process comprises a first modification reaction, and the double-furnace double-kettle stripping flash process comprises a first modification reaction and a second modification reaction, namely two modification reactions), a plurality of reaction kettles are adopted for parallel operation; the prior tar device needs to be matched with two or even a plurality of modified asphalt production lines, and only one modified asphalt production line can meet the requirement at present;
2) compared with the mode of adopting more than two modified asphalt production lines, the mode of adopting the parallel operation of the reaction kettles has the advantages that the control system is greatly simplified, the operation and maintenance personnel are reduced, and the production cost is reduced.
2) Compared with the mode of adopting more than two modified asphalt production lines, the mode of adopting the reaction kettles to be connected in series greatly saves the occupied area and the investment cost.
Drawings
FIG. 1 is a schematic structural diagram of a tubular furnace heating modified asphalt production system with multiple parallel reaction kettles (taking a double-furnace double-kettle stripping flash evaporation process as an example).
In the figure: 1A.1# reaction kettle A1 B.1# reaction kettle B2 A.2# reaction kettle A2 B.2# reaction kettle B3 A.1# modified asphalt circulating pump A3 B.1# modified asphalt circulating pump B4 A.2# modified asphalt circulating pump A4 B.2# modified asphalt circulating pump B5.1 # tubular furnace 6.2# tubular furnace 7A, jet mixer A7B, jet mixer B8, flow regulating valve I9, flow regulating valve II 10, flow regulating valve III 11, flow regulating valve IV 12A, weight recording regulating valve I12B, weight recording control instrument FRQ01/FR03/FR04/FR05/FR 07/08/FF7309, flow recording and accumulating meter RC 23/FFFFFFFFR 10.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:
the utility model discloses a tubular furnace heating method modified asphalt production system with multiple parallel reaction kettles, which comprises a primary reaction unit or comprises a primary reaction unit and a secondary reaction unit; a plurality of parallel reaction kettles are arranged in the primary reaction unit, and a plurality of parallel reaction kettles are arranged in the secondary reaction unit.
The utility model relates to a production system for modified asphalt by a multi-reaction kettle parallel connection tubular furnace heating method, which comprises a primary reaction unit and a secondary reaction unit; the primary reaction unit is internally provided with a # 1 tubular furnace 5, a # 1 reaction kettle A1A, a # 1 reaction kettle B1B, a # 1 modified asphalt circulating pump A3A and a # 1 modified asphalt circulating pump B3B; the secondary reaction unit is internally provided with A2 # tubular furnace 6, A2 # reaction kettle A2A, A2 # reaction kettle B2B, a jet mixer A7A, a jet mixer B7B, A2 # modified asphalt circulating pump A4A and A2 # modified asphalt circulating pump B4B;
the top parts of the No. 1 reaction kettle A1A and the No. 1 reaction kettle B1B are respectively provided with a flash evaporation oil gas outlet, the upper parts of the flash evaporation oil gas outlets are respectively provided with an asphalt inlet, and the bottom parts of the flash evaporation oil gas outlets are respectively provided with a primary modified asphalt outlet; the flash oil gas outlet of the No. 1 reaction kettle A1A and the flash oil gas outlet of the No. 1 reaction kettle B1B are respectively connected with an external normal pressure stripping tower through flash oil gas conveying pipelines; the No. 1 tubular furnace 5 is provided with an asphalt inlet and an asphalt outlet, and the asphalt outlet of the No. 1 tubular furnace 5 is connected with an asphalt return pipeline I and an asphalt return pipeline II through an asphalt outlet main pipe I; the first asphalt return pipeline is connected with an asphalt inlet of A1 # reaction kettle A1A, and the second asphalt return pipeline is connected with an asphalt inlet of A1 # reaction kettle B1B; the first asphalt return pipeline is connected with a raw material medium-temperature asphalt main pipe through a medium-temperature asphalt pipeline, and the second asphalt return pipeline is connected with the raw material medium-temperature asphalt main pipe through a medium-temperature asphalt pipeline; a No. 1 modified asphalt circulating pump A3A is arranged at a primary modified asphalt outlet of the No. 1 reaction kettle A1A; the primary modified asphalt outlet of the No. 1 reaction kettle A1A is connected with the asphalt inlet of the No. 1 tubular furnace 5 through an asphalt returning pipeline I, and is connected with a jet mixer A7A in the secondary reaction unit through an asphalt conveying pipeline I; a No. 1 modified asphalt circulating pump B3B is arranged at a primary modified asphalt outlet of the No. 1 reaction kettle B1B; the primary modified asphalt outlet of the No. 1 reaction kettle B1B is connected with the asphalt inlet of the No. 1 tubular furnace 5 through an asphalt returning pipeline II, and is connected with a jet mixer B7B in the secondary reaction unit through an asphalt conveying pipeline II;
flash evaporation oil gas outlets are formed in the tops of the 2# reaction kettle A2A and the 2# reaction kettle B2B, asphalt inlets are formed in the upper portions of the flash evaporation oil gas outlets, and secondary modified asphalt outlets are formed in the bottoms of the flash evaporation oil gas outlets; the flash oil gas outlet of the No. 2 reaction kettle A2A and the flash oil gas outlet of the No. 2 reaction kettle B2B are respectively connected with an external normal pressure stripping tower through flash oil gas conveying pipelines; an asphalt inlet and an asphalt outlet are formed in the No. 2 tubular furnace 6, and the asphalt outlet of the No. 2 tubular furnace 6 is connected with an asphalt return pipeline III and an asphalt return pipeline IV through an asphalt outlet header pipe II; the third asphalt return pipeline is connected with an asphalt inlet of A2 # reaction kettle A2A, and the fourth asphalt return pipeline is connected with an asphalt inlet of A2 # reaction kettle B2B; a2 # modified asphalt circulating pump A4A is arranged at a secondary modified asphalt outlet of the 2# reaction kettle A2A; the secondary modified asphalt outlet of the No. 2 reaction kettle A2A is connected with the asphalt inlet of the No. 2 tubular furnace 6 through an asphalt returning pipeline III, a jet mixer A7A is arranged on the asphalt returning pipeline III, and the secondary modified asphalt outlet of the No. 2 reaction kettle A2A is connected with an asphalt delivery main pipeline through an asphalt delivery pipeline I; a 2# modified asphalt circulating pump B4B is arranged at a secondary modified asphalt outlet of the 2# reaction kettle B2B; the secondary modified asphalt outlet of the No. 2 reaction kettle B2B is connected with the asphalt inlet of the No. 2 tubular furnace 6 through an asphalt returning pipeline IV, a jet mixer B7B is arranged on the asphalt returning pipeline IV, and the secondary modified asphalt outlet of the No. 2 reaction kettle B2B is connected with an asphalt delivery main pipeline through an asphalt delivery pipeline II; and the asphalt delivery main pipeline is connected with a normal-pressure stripping tower.
A flow recording instrument FR05 is arranged on the first asphalt outlet header pipe, a flow recording proportion adjusting instrument FFRC06 and a flow adjusting valve I8 are arranged on the first asphalt return pipeline, and a flow adjusting valve II 9 is arranged on the second asphalt return pipeline; and the flow recording instrument FR05, the flow recording proportion adjusting instrument FFRC06, the first flow regulating valve 8 and the second flow regulating valve 9 are controlled in an interlocking manner.
A flow recording and accumulating instrument FRQ01 is arranged on the raw material medium temperature asphalt main pipe, a flow recording proportion adjusting instrument FFRC02 and a flow adjusting valve III 10 are arranged on the medium temperature asphalt branch pipe I, and a flow adjusting valve IV 11 is arranged on the medium temperature asphalt branch pipe II; the flow recording accumulation instrument FRQ01, the flow recording proportion adjusting instrument FFRC02, the flow adjusting valve three 10 and the flow adjusting valve four 11 are controlled in an interlocking way.
The 1# reaction kettle A1A is provided with a weight recording control instrument WRC01A, the first asphalt conveying pipeline is provided with a weight recording regulating valve I12A, and the weight recording control instrument WRC01A and the weight recording regulating valve I12A are controlled in an interlocking mode; a flow recording and accumulating instrument FR03 is arranged on the first asphalt return pipeline; the 1# reaction kettle B1B is provided with a weight recording control instrument WRC01B, the second asphalt conveying pipeline is provided with a second weight recording regulating valve 12B, and the weight recording control instrument WRC01B and the second weight recording regulating valve 12B are controlled in an interlocking manner; and a flow recording and accumulating instrument FR04 is arranged on the second asphalt return pipeline.
A flow recording instrument FR09 is arranged on the second asphalt outlet header pipe, a flow recording proportion adjusting instrument FFRC10 and a flow adjusting valve V13 are arranged on the third asphalt return pipeline, and a flow adjusting valve VI 14 is arranged on the fourth asphalt return pipeline; and the flow recording instrument FR09, the flow recording proportion adjusting instrument FFRC10, the five flow adjusting valve 13 and the six flow adjusting valve 14 are controlled in an interlocking manner.
The 2# reaction kettle A2A is provided with a weight recording control instrument WRC02A, a weight recording adjusting valve III 15A on the asphalt delivery pipeline I is subjected to interlocking control with the weight recording adjusting valve III 15A through the weight recording control instrument WRC 02A; a flow recording instrument FR07 is arranged on the first mixed asphalt pipeline; the 2# reaction kettle B2B is provided with a weight recording control instrument WRC02B, the second asphalt delivery pipeline is provided with a weight recording regulating valve IV 15B, and the weight recording control instrument WRC02B and the weight recording regulating valve IV 15B are controlled in an interlocking manner; and a flow recording instrument FR08 is arranged on the first mixed asphalt pipeline.
The technical process of the tubular furnace heating method modified asphalt production system with the multiple parallel reaction kettles is as follows: the production process of the modified asphalt is a single-furnace single-kettle stripping flash evaporation process and comprises a primary modification reaction process; or the production process of the modified asphalt is a double-furnace double-kettle stripping flash evaporation process, which comprises a primary modification reaction process and a secondary modification reaction process; it is characterized in that more than 2 reaction kettles are adopted for parallel operation in the single modification reaction process.
The modified asphalt production process is a normal-pressure double-furnace double-kettle stripping flash evaporation process, wherein the double kettles are A1 # reaction kettle group and A2 # reaction kettle group, the 1# reaction kettle group is formed by connecting A1 # reaction kettle A1A and A1 # reaction kettle B1B in parallel, and the 2# reaction kettle group is formed by connecting A2 # reaction kettle A2A and A2 # reaction kettle B2B in parallel.
The technical process of the tubular furnace heating method modified asphalt production system with multiple parallel reaction kettles specifically comprises the following steps:
1) a flow recording instrument FR05 is arranged on an asphalt outlet header pipe of the No. 1 tubular furnace 5, asphalt flowing through the flow recording instrument FR05 is divided into two paths, one path of asphalt returns to the No. 1 reaction kettle A1A, and a flow recording proportion adjusting instrument FFRC06 and a flow adjusting valve I8 are arranged on a corresponding asphalt return pipeline I; the other path of asphalt returns to the No. 1 reaction kettle B1B, and a flow regulating valve II 9 is arranged on the corresponding asphalt return pipeline II; controlling the flow of a flow recording proportion adjusting instrument FFRC06 to be half of the flow of a flow recording instrument FR05 through a flow adjusting valve I8 and a flow adjusting valve II 9;
2) a flow recording and accumulating instrument FRQ01 is arranged on a raw material medium temperature asphalt main pipe, the raw material medium temperature asphalt flowing through the flow recording and accumulating instrument FRQ01 is divided into two paths, one path of raw material medium temperature asphalt is mixed with asphalt in an asphalt outlet pipeline I through a medium temperature asphalt pipeline I, and then the mixed raw material medium temperature asphalt and the asphalt enter a No. 1 reaction kettle A1A together to carry out primary modification reaction; a flow recording proportion adjusting instrument FFRC02 and a flow adjusting valve III 10 are arranged on the medium temperature asphalt pipeline I; the other path of raw material medium-temperature asphalt is mixed with asphalt in an asphalt outlet pipeline II through a medium-temperature asphalt pipeline II and then enters a No. 1 reaction kettle B1B together for primary modification reaction; a flow regulating valve IV 11 is arranged on the medium temperature asphalt pipeline II; controlling the flow of a flow recording proportion adjusting instrument FFRC02 to be half of the flow of a flow recording instrument FRQ01 through a flow adjusting valve III 10 and a flow adjusting valve IV 11;
3) the first modification reaction process in the 1# reaction kettle A1A and the 1# reaction kettle B1B is as follows: controlling the temperature in the reaction kettle to be 360-400 ℃, mainly carrying out beta-modification reaction on the asphalt, and discharging flash evaporation oil gas generated by flash evaporation cracking into a normal pressure stripping tower through a flash evaporation oil gas main pipe at the top of the reaction kettle;
4) the asphalt after primary modification in the No. 1 reaction kettle A1A is pumped out from the bottom of the No. 1 modified asphalt circulating pump A3A, most of the asphalt is sent to the No. 1 tubular furnace 5 for heating through an asphalt returning pipeline, the asphalt is circulated back to the No. 1 reaction kettle A1A for heating the newly mixed raw material medium temperature asphalt, and the rest of the asphalt is sent to the No. 2 reaction kettle A2A for secondary modification reaction through an asphalt conveying pipeline; the weight of the 1# reaction kettle A1A is maintained to be stable through a weight recording adjusting valve 12A arranged on the asphalt conveying pipeline I, and the weight of the 1# reaction kettle A1A is monitored by a weight recording control instrument WRC 01A; controlling the flow of the asphalt sent to carry out the secondary modification reaction, and arranging a flow recording and accumulating instrument FR03 on the first asphalt returning pipeline for monitoring the modified asphalt circulation quantity of the 1# reaction kettle A1A;
the asphalt after primary modification in the No. 1 reaction kettle B1B is pumped out from the bottom of the No. 1 modified asphalt circulating pump B3B, most of the asphalt is sent to the No. 1 tubular furnace 6 through an asphalt returning pipeline II to be heated, then the asphalt is circulated back to the No. 1 reaction kettle B1B to heat the newly mixed raw material medium-temperature asphalt, and the rest of the asphalt is sent to the No. 2 reaction kettle B2B through an asphalt conveying pipeline II to be subjected to secondary modification reaction; the weight of the 1# reaction kettle B1B is maintained to be stable through a weight recording adjusting valve II 12B arranged on the asphalt conveying pipeline II, and the weight of the 1# reaction kettle B1B is monitored by a weight recording control instrument WRC 01B; controlling the flow of the asphalt sent to perform the secondary upgrading reaction, and arranging a flow recording and accumulating instrument FR04 on the asphalt returning pipeline II for monitoring the recycling amount of the upgraded asphalt in the 1# reaction kettle B1B;
5) a flow recording instrument FR09 is arranged on an asphalt outlet header pipe of the No. 2 tubular furnace 6, asphalt flowing through the flow recording instrument FR09 is divided into two paths, one path of asphalt returns to the No. 2 reaction kettle A2A through an asphalt backflow pipeline III to carry out secondary modification reaction, and a flow recording proportion adjusting instrument FFRC10 and a flow adjusting valve V13 are arranged on the asphalt backflow pipeline III; the other path of asphalt returns to the No. 2 reaction kettle B2B through an asphalt backflow pipeline IV to carry out secondary modification reaction, a flow regulating valve VI 14 is arranged on the asphalt backflow pipeline IV, and the flow of a control flow recording proportion regulating instrument FFRC10 is half of the flow of a flow recording instrument FR09 through a flow regulating valve V13 and the flow regulating valve VI 14;
6) the secondary modification reaction process in the 2# reaction kettle A2A and the 2# reaction kettle B2B is as follows: controlling the temperature in the reaction kettle to be 380-420 ℃, simultaneously carrying out alpha-and beta-modification reactions, and discharging flash evaporation oil gas generated by flash evaporation cracking into a normal pressure stripping tower through a flash evaporation oil gas main pipe at the top of the reaction kettle;
7) the asphalt after secondary modification in the 2# reaction kettle A2A is pumped out from the bottom of the reaction kettle A2A through A2 # modified asphalt circulating pump A4A, most of the asphalt is mixed with the asphalt which is sent through an asphalt conveying pipeline and subjected to primary modification in a jet mixer A7A, then the mixture is sent to A2 # tubular furnace 6 for heating through a mixed asphalt pipeline, and is circulated back to the 2# reaction kettle A2A through an asphalt backflow pipeline for secondary modification reaction, and the rest of the asphalt is sent to a normal-pressure stripping tower through an asphalt delivery pipeline; controlling the flow of the asphalt sent to the normal pressure stripping tower through a weight recording regulating valve III 15A arranged on the asphalt delivery pipeline I so as to maintain the weight stability of A2 # reaction kettle A2A, wherein the weight of the 2# reaction kettle A2A is monitored by a weight recording control instrument WRC 02A; a flow recording instrument FR07 is arranged on the first mixed asphalt pipeline and is used for monitoring the circulating quantity of the modified asphalt of the 2# reaction kettle A2A;
the asphalt after secondary modification in the No. 2 reaction kettle B2B is pumped out from the bottom of the reaction kettle B2B through a No. 2 modified asphalt circulating pump B4B, most of the asphalt is mixed with the asphalt which is sent by an asphalt conveying pipeline II and subjected to primary modification in a jet mixer B7B, then the mixture is sent to a No. 2 tubular furnace 6 for heating through a mixed asphalt pipeline II, and is circulated back to the No. 2 reaction kettle B through an asphalt backflow pipeline IV for secondary modification reaction, and the rest of the asphalt is sent to a normal pressure stripping tower through an asphalt delivery pipeline II; controlling the flow of the asphalt sent to the normal pressure stripping tower through a weight recording regulating valve IV 15B arranged on an asphalt delivery pipeline II so as to maintain the weight stability of a 2# reaction kettle B2B, wherein the weight of the 2# reaction kettle B2B is monitored by a weight recording control instrument WRC 02B; a flow recording instrument FR08 is arranged on the first mixed asphalt pipeline and is used for monitoring the circulating quantity of the modified asphalt of the 2# reaction kettle B2B.
Take the case of ordinary pressure double-furnace double-kettle stripping flash distillation technology, the utility model provides an all adopt the parallelly connected mode of operation of 2 reation kettle in the primary modification reaction, the secondary modification reaction process, 2 reation kettle's control principle as follows:
1) two reaction kettles which are operated in parallel are respectively provided with a modified asphalt circulating pump, so that the circulation volume of each reaction kettle can be ensured to be the same and stable, the asphalt discharge volume of each reaction kettle after reaction can be ensured to be the same and stable, and the control of the process is simplified.
2) The weight of the reaction kettle is kept unchanged through the control of the corresponding valve, and the asphalt discharge amount is ensured to be the same as the feeding amount.
3) And monitoring whether the circulation amounts of the two reaction kettles are basically the same through a flow recording instrument so as to ensure whether the running states of the reaction kettles are consistent.
4) In order to ensure that the circulation amount of each reaction kettle is consistent, namely, the circulation amount of the asphalt returned to each reaction kettle is the same, theoretically, the circulation amount returned to a single reaction kettle is only half of the total circulation amount. Therefore, a flow recording instrument is arranged on the backflow main pipeline, a flow regulating valve is arranged on each asphalt backflow pipeline corresponding to 2 reaction kettles, a flow recording proportion regulating instrument is arranged on one of the asphalt backflow pipelines, the flow recording proportion regulating instrument is regulated by 2 flow regulating valves together, and the numerical value of the flow recording proportion regulating instrument is controlled to be half of the flow recording accumulation instrument on the backflow main pipeline.
5) In order to ensure that the raw material amount of each reaction kettle is consistent, namely, the asphalt raw material amount input into each reaction kettle is the same, theoretically, the input amount input into a single reaction kettle is only required to be half of the total raw material amount. Therefore, the flow recording accumulation instrument is arranged on the raw material main pipeline, the asphalt input pipelines corresponding to the 2 reaction kettles are respectively provided with a flow regulating valve, one of the asphalt input pipelines is provided with the flow recording proportion regulating instrument, and the numerical value of the flow recording proportion regulating instrument is controlled to be half of the total flow recording accumulation instrument on the raw material main pipeline through the common regulation of the 2 flow regulating valves.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (7)
1. The system for producing the modified asphalt by the tubular furnace heating method with the multiple parallel reaction kettles is characterized by comprising a primary reaction unit or a primary reaction unit and a secondary reaction unit; a plurality of parallel reaction kettles are arranged in the primary reaction unit, and a plurality of parallel reaction kettles are arranged in the secondary reaction unit.
2. The system for producing the modified asphalt by the heating method of the tubular furnace with the multiple parallel reaction kettles as claimed in claim 1, which is characterized by comprising a primary reaction unit and a secondary reaction unit; the primary reaction unit is internally provided with a # 1 tubular furnace, a # 1 reaction kettle A, a # 1 reaction kettle B, a # 1 modified asphalt circulating pump A and a # 1 modified asphalt circulating pump B; the secondary reaction unit is internally provided with a No. 2 tube furnace, a No. 2 reaction kettle A, a No. 2 reaction kettle B, a jet mixer A, a jet mixer B, a No. 2 modified asphalt circulating pump A and a No. 2 modified asphalt circulating pump B;
the top parts of the No. 1 reaction kettle A and the No. 1 reaction kettle B are both provided with flash evaporation oil gas outlets, the upper parts of the reaction kettles are both provided with asphalt inlets, and the bottom parts of the reaction kettles are both provided with primary modified asphalt outlets; the flash oil gas outlet of the No. 1 reaction kettle A and the flash oil gas outlet of the No. 1 reaction kettle B are respectively connected with an external normal pressure stripping tower through flash oil gas conveying pipelines; the No. 1 pipe furnace is provided with an asphalt inlet and an asphalt outlet, and the asphalt outlet of the No. 1 pipe furnace is connected with an asphalt return pipeline I and an asphalt return pipeline II through an asphalt outlet main pipe I; the first asphalt backflow pipeline is connected with an asphalt inlet of the No. 1 reaction kettle A, and the second asphalt backflow pipeline is connected with an asphalt inlet of the No. 1 reaction kettle B; the first asphalt return pipeline is connected with a raw material medium-temperature asphalt main pipe through a medium-temperature asphalt pipeline, and the second asphalt return pipeline is connected with the raw material medium-temperature asphalt main pipe through a medium-temperature asphalt pipeline; a 1# modified asphalt circulating pump A is arranged at a primary modified asphalt outlet of the 1# reaction kettle A; the primary modified asphalt outlet of the No. 1 reaction kettle A is connected with the asphalt inlet of the No. 1 tubular furnace through an asphalt returning pipeline I, and is connected with the jet mixer A in the secondary reaction unit through an asphalt conveying pipeline I; a 1# modified asphalt circulating pump B is arranged at a primary modified asphalt outlet of the 1# reaction kettle B; the primary modified asphalt outlet of the No. 1 reaction kettle B is connected with the asphalt inlet of the No. 1 tubular furnace through an asphalt returning pipeline II, and is connected with a jet mixer B in the secondary reaction unit through an asphalt conveying pipeline II;
the top parts of the 2# reaction kettle A and the 2# reaction kettle B are respectively provided with a flash evaporation oil gas outlet, the upper parts of the flash evaporation oil gas outlets are respectively provided with an asphalt inlet, and the bottom parts of the flash evaporation oil gas outlets are respectively provided with a secondary modified asphalt outlet; the flash oil gas outlet of the No. 2 reaction kettle A and the flash oil gas outlet of the No. 2 reaction kettle B are respectively connected with an external normal pressure stripping tower through flash oil gas conveying pipelines; the 2# tubular furnace is provided with an asphalt inlet and an asphalt outlet, and the asphalt outlet of the 2# tubular furnace is connected with an asphalt return pipeline III and an asphalt return pipeline IV through an asphalt outlet header pipe II; the third asphalt return pipeline is connected with an asphalt inlet of the 2# reaction kettle A, and the fourth asphalt return pipeline is connected with an asphalt inlet of the 2# reaction kettle B; a 2# modified asphalt circulating pump A is arranged at a secondary modified asphalt outlet of the 2# reaction kettle A; the secondary modified asphalt outlet of the No. 2 reaction kettle A is connected with the asphalt inlet of the No. 2 tube furnace through an asphalt returning pipeline III, a jet mixer A is arranged on the asphalt returning pipeline III, and the secondary modified asphalt outlet of the No. 2 reaction kettle A is connected with an asphalt delivery main pipeline through an asphalt delivery pipeline I; a 2# modified asphalt circulating pump B is arranged at a secondary modified asphalt outlet of the 2# reaction kettle B; the secondary modified asphalt outlet of the No. 2 reaction kettle B is connected with the asphalt inlet of the No. 2 tube furnace through an asphalt returning pipeline IV, a jet mixer B is arranged on the asphalt returning pipeline IV, and the secondary modified asphalt outlet of the No. 2 reaction kettle B is connected with an asphalt delivery main pipeline through an asphalt delivery pipeline II; and the asphalt delivery main pipeline is connected with a normal-pressure stripping tower.
3. The system for producing the modified asphalt by the heating method of the tube furnace with the multiple parallel reaction kettles as claimed in claim 2, wherein a flow recording instrument FR05 is arranged on the first asphalt outlet header pipe, a flow recording proportion adjusting instrument FFRC06 and a flow adjusting valve i are arranged on the first asphalt return pipe, and a flow adjusting valve ii is arranged on the second asphalt return pipe; and the flow recording instrument FR05, the flow recording proportion adjusting instrument FFRC06, the first flow adjusting valve and the second flow adjusting valve are controlled in a double-locking mode.
4. The system for producing the modified asphalt by the heating method of the tube furnace with the multiple parallel reaction kettles according to claim 2, wherein a raw material medium temperature asphalt main pipe is provided with a flow recording and accumulating instrument FRQ01, a first medium temperature asphalt branch pipe is provided with a flow recording proportion adjusting instrument FFRC02 and a third flow adjusting valve, and a second medium temperature asphalt branch pipe is provided with a fourth flow adjusting valve; the flow recording and accumulating instrument FRQ01, the flow recording proportion adjusting instrument FFRC02, the flow adjusting valve III and the flow adjusting valve IV are controlled in a four-linkage mode.
5. The system for producing the modified asphalt by the tubular furnace heating method with the multiple parallel reaction kettles as claimed in claim 2, wherein the No. 1 reaction kettle A is provided with a weight recording control instrument WRC01A, the asphalt conveying pipeline I is provided with a weight recording control valve I, and the weight recording control instrument WRC01A and the weight recording control valve I are controlled in an interlocking manner; a flow recording and accumulating instrument FR03 is arranged on the first asphalt return pipeline; the No. 1 reaction kettle B is provided with a weight recording control instrument WRC01B, the second asphalt conveying pipeline is provided with a second weight recording adjusting valve, and the weight recording control instrument WRC01B and the weight recording adjusting valve are subjected to dual lock control; and a flow recording and accumulating instrument FR04 is arranged on the second asphalt return pipeline.
6. The system for producing the modified asphalt by the heating method of the tube furnace with the multiple parallel reaction kettles as claimed in claim 2, wherein a flow recording instrument FR09 is arranged on the second asphalt outlet header pipe, a flow recording proportion adjusting instrument FFRC10 and a flow adjusting valve v are arranged on the third asphalt return pipe, and a flow adjusting valve v is arranged on the fourth asphalt return pipe; and the flow recording instrument FR09, the flow recording proportion adjusting instrument FFRC10, the flow regulating valve five and the flow regulating valve six are controlled in an interlocking manner.
7. The system for producing the modified asphalt by the tubular furnace heating method with the multiple parallel reaction kettles as claimed in claim 2, wherein the 2# reaction kettle A is provided with a weight recording control instrument WRC02A, a weight recording control valve III on the asphalt delivery pipeline I, and a weight recording control instrument WRC02A and the weight recording control valve triple lock control; and the No. 2 reaction kettle B is provided with a weight recording control instrument WRC02B, the second asphalt delivery pipeline is provided with a weight recording regulating valve IV, and the weight recording control instrument WRC02B and the weight recording regulating valve are subjected to four-interlocking control.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021925046.1U CN212581810U (en) | 2020-09-04 | 2020-09-04 | Multi-reaction-kettle parallel-connected tubular furnace heating method modified asphalt production system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021925046.1U CN212581810U (en) | 2020-09-04 | 2020-09-04 | Multi-reaction-kettle parallel-connected tubular furnace heating method modified asphalt production system |
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| CN202021925046.1U Active CN212581810U (en) | 2020-09-04 | 2020-09-04 | Multi-reaction-kettle parallel-connected tubular furnace heating method modified asphalt production system |
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