阅读说明：本技术 一种采用卧式反应釜的改质沥青生产系统及工艺 (Modified asphalt production system and process adopting horizontal reaction kettle ) 是由 杨雪松 于 2020-12-24 设计创作，主要内容包括：本发明涉及一种采用卧式反应釜的改质沥青生产系统及工艺,所述系统包括由1#反应釜、2#反应釜、1#管式炉、2#管式炉组成的双炉双釜改质沥青生产系统；还包括设于2#反应釜的二次改质沥青出口管道上的改质釜,并且所述1#反应釜、2#反应釜、改质釜均为卧式反应釜。本发明通过在卧式反应釜内设置折流板,实现物料的有序进出,并保证所有物料都能够有相同且足够的停留时间；可以替代常规采用立式反应釜的生产系统,特别是在反应釜满流出料部分,可以简化设备配置。(The invention relates to a system and a process for producing modified asphalt by using a horizontal reaction kettle, wherein the system comprises a double-furnace double-kettle modified asphalt production system consisting of a No. 1 reaction kettle, a No. 2 reaction kettle, a No. 1 tubular furnace and a No. 2 tubular furnace; the device also comprises a modification kettle arranged on a secondary modified asphalt outlet pipeline of the No. 2 reaction kettle, and the No. 1 reaction kettle, the No. 2 reaction kettle and the modification kettle are all horizontal reaction kettles. According to the invention, the baffle plates are arranged in the horizontal reaction kettle, so that the materials can be orderly fed in and out, and the same and enough residence time of all the materials is ensured; can replace the conventional production system adopting a vertical reaction kettle, particularly in the full-flow discharge part of the reaction kettle, and can simplify the equipment configuration.)

1. A modified asphalt production system adopting a horizontal reaction kettle comprises a double-furnace double-kettle modified asphalt production system consisting of a No. 1 reaction kettle, a No. 2 reaction kettle, a No. 1 tubular furnace and a No. 2 tubular furnace; the device is characterized by further comprising a modification kettle arranged on a secondary modified asphalt outlet pipeline of the No. 2 reaction kettle, and the No. 1 reaction kettle, the No. 2 reaction kettle and the modification kettle are all horizontal reaction kettles.

2. The system for producing upgraded asphalt of claim 1, wherein the horizontal reactor has a plurality of baffles along the asphalt flow direction.

3. The system for producing the modified asphalt by using the horizontal reaction kettle according to claim 2, wherein the baffle plate consists of an upper baffle plate and a lower baffle plate which are alternately arranged at intervals, the top of the upper baffle plate is fixedly connected with the top wall of the horizontal reaction kettle, and a lower asphalt flow channel is formed between the bottom of the upper baffle plate and the bottom wall of the horizontal reaction kettle; the bottom of the lower baffle plate is fixedly connected with the bottom wall of the horizontal kettle, and an upper asphalt flow channel is formed between the top of the lower baffle plate and the top wall of the horizontal kettle.

4. The system for producing the modified asphalt by using the horizontal reaction kettle according to claim 1, is characterized by comprising:

a raw material asphalt inlet is formed at one end of the top of the No. 1 reaction kettle, a primary modified asphalt outlet is formed at the other end of the No. 1 reaction kettle, and a circulating asphalt outlet is formed at the bottom of the other end of the No. 1 reaction kettle; the top of the No. 1 reaction kettle is provided with a plurality of flash evaporation oil gas outlets along the flowing direction of asphalt, and is connected with an external flash evaporation oil gas condensation cooler through a flash evaporation oil gas pipeline; a circulating asphalt outlet of the No. 1 reaction kettle is connected with a raw material asphalt inlet through a No. 1 circulating asphalt pipeline, and the No. 1 circulating asphalt pipeline is provided with a No. 1 modified asphalt circulating pump, a No. 1 tubular furnace and a medium-temperature asphalt inlet; a primary modified asphalt outlet of the No. 1 reaction kettle is connected with a primary modified asphalt conveying pipeline;

one end of the top of the 2# reaction kettle is provided with a primary modified asphalt inlet, the other end of the 2# reaction kettle is provided with a secondary modified asphalt outlet, and the bottom of the other end of the 2# reaction kettle is provided with a circulating asphalt outlet; the top of the No. 2 reaction kettle is provided with a plurality of flash evaporation oil gas outlets along the flowing direction of the asphalt, and the flash evaporation oil gas outlets are connected with an external flash evaporation oil gas condensation cooler through flash evaporation oil gas pipelines; a circulating asphalt outlet of the No. 2 reaction kettle is connected with a first modified asphalt inlet through a No. 2 circulating asphalt pipeline, a No. 2 modified asphalt circulating pump, a No. 2 tube furnace and a first modified asphalt inlet are arranged on the No. 2 circulating asphalt pipeline, and the first modified asphalt inlet is connected with a first modified asphalt conveying pipeline; a secondary modified asphalt outlet of the 2# reaction kettle is connected with a secondary modified asphalt conveying pipeline;

one end of the top of the modifying kettle is provided with a secondary modified asphalt inlet, the top of the modifying kettle is provided with a plurality of flash evaporation oil gas outlets along the flowing direction of asphalt, and the flash evaporation oil gas outlets are connected with an external flash evaporation oil gas condensation cooler through flash evaporation oil gas pipelines; the bottom of the other end of the modified kettle is provided with a modified asphalt outlet which is connected with an external falling film cooler through a modified asphalt conveying pipeline, and the modified asphalt conveying pipeline is provided with a modified asphalt output pump.

5. The system for producing modified asphalt by using a horizontal reactor as claimed in claim 4, wherein the raw material asphalt inlet, the primary modified asphalt inlet and the secondary modified asphalt inlet are respectively provided with an inlet pipe, and the inlet pipes are inserted downwards into the bottoms of the corresponding 1# reactor, 2# reactor and modified kettle.

6. The system for producing upgraded asphalt by using a horizontal reactor as claimed in claim 4, wherein the outlet of the primary upgraded asphalt is provided with at least 2 full flow asphalt pipes along the height direction, and the 2 full flow asphalt pipes are respectively provided with a # 1 full flow valve; at least 2 asphalt full-flow pipes are arranged at the secondary modified asphalt outlet along the height direction, and 2# full-flow valves are respectively arranged on the 2 asphalt full-flow pipes.

7. The modified asphalt production system adopting the horizontal reaction kettle according to claim 4, wherein a liquid level recording and adjusting instrument is arranged at one end of the modified asphalt conveying pipeline, a liquid level adjusting valve is arranged on the modified asphalt conveying pipeline, and the liquid level recording and adjusting instrument and the liquid level adjusting valve are controlled in an interlocking manner.

8. The system for producing modified asphalt by using a horizontal reaction kettle according to claim 4, wherein the arrangement heights of the 1# reaction kettle, the 2# reaction kettle and the modifying kettle are gradually decreased.

9. The production process of the modified asphalt adopting the horizontal reaction kettle based on the system of any one of claims 1 to 8 is characterized by comprising the following steps:

1) mixing raw material medium temperature asphalt with outlet asphalt of a No. 1 tubular furnace, and feeding the mixture into a No. 1 reaction kettle for primary modification reaction; the temperature in the No. 1 reaction kettle is controlled to be 360-400 ℃, and the asphalt mainly undergoes a beta-modification reaction; flash oil gas generated by the reaction cracking is discharged to an external flash oil gas condensation cooler through a plurality of flash oil gas outlets at the top of the No. 1 reaction kettle; the asphalt enters the bottom of one end of the No. 1 reaction kettle, and reaches the other end after being baffled by a plurality of baffle plates, so that the primary modification process is completed; most of the primary modified asphalt is pumped out from the bottom of the No. 1 reaction kettle by a No. 1 modified asphalt circulating pump, sent to a No. 1 tubular furnace for heating, mixed with the raw material medium-temperature asphalt and then circulated back to the No. 1 reaction kettle; a small part of the primary modified asphalt flows out through the full flow pipe, automatically flows into a No. 2 reaction kettle, and selects a full flow pipe with a corresponding height through a No. 1 full flow valve according to the amount of the raw material asphalt to be treated;

2) controlling the temperature in the 2# reaction kettle to be 380-420 ℃, and simultaneously carrying out alpha-modification reaction and beta-modification reaction in the 2# reaction kettle; the primary modified asphalt and the circulating asphalt in the No. 2 reaction kettle pass through a No. 2 modified asphalt circulating pump, are heated by a No. 2 tubular furnace and then enter the No. 2 reaction kettle for secondary modification reaction; flash oil gas generated by the reaction cracking is discharged to an external condensation cooler through a plurality of flash oil gas outlets at the top of the 2# reaction kettle; the asphalt enters the bottom of one end of the 2# reaction kettle and reaches the other end after being baffled by a plurality of baffle plates, so that the secondary modification process is completed; most of secondary modified asphalt is pumped out from the bottom by a 2# modified asphalt circulating pump, sent to a 2# tubular furnace together with primary modified asphalt sent out from a 1# reaction kettle in full flow for heating, and then circulated back to a 2# reaction kettle for secondary modification reaction; a small part of secondary modified asphalt flows out through the full flow pipe, automatically flows to the modifying kettle, and selects a full flow pipe with a corresponding height through a No. 2 full flow valve according to the treated asphalt amount;

3) in the modification kettle, the residual heat of the asphalt is utilized, the modification reaction is continuously carried out by prolonging the residence time of the secondary modified asphalt, and flash oil gas generated by the reaction cracking is discharged to an external condensing cooler through a plurality of flash oil gas outlets at the top of the modification kettle; the secondary modified asphalt enters from the bottom of one end of the modified kettle, is deflected by a plurality of baffle plates and reaches the other end, is interlocked and controlled by a liquid level recording and adjusting instrument and a liquid level adjusting valve, keeps the liquid level of the modified kettle constant, realizes the same discharge quantity and feed quantity of the modified asphalt, and is output and pumped to an external falling film cooler by the modified asphalt.

Technical Field

The invention relates to the technical field of modified asphalt production, in particular to a system and a process for producing modified asphalt by using a horizontal reaction kettle.

Background

50% -60% of asphalt is generally produced in the coal tar processing process, which belongs to bulk products 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 asphalt and is mainly used for producing prebaked anodes in the electrolytic aluminum industry to prepare battery rods or electrode binders.

At present, the domestic production process of modified asphalt mostly adopts a thermal polycondensation method, and the thermal polycondensation method can be divided into a kettle type heating method and a tube furnace heating method according to the heating mode.

The production process of the modified asphalt by the kettle type heating method comprises the following steps: the medium temperature asphalt is used as raw material, the heating furnace directly heats the outer surface of the reaction kettle, and the reaction kettle achieves the purpose of asphalt modification by controlling certain reaction residence time and proper reaction temperature. Because the heating surface is the outer surface of the reaction kettle, in order to achieve good mass and heat transfer effects, a stirrer needs to be arranged in the reaction kettle, so that the volume of the reaction kettle is limited, and the production capacity is limited.

The production process of modified asphalt by a tubular furnace heating method (double-furnace double-kettle process) comprises the following steps: taking medium-temperature asphalt as a raw material, heating the asphalt in a tubular heating furnace, and then carrying out modification reaction in a reaction kettle; the reaction is carried out in two steps, and the reaction time is prolonged by a stripping tower or a modification kettle after the reaction, so as to obtain the modified asphalt product. The process has the advantages that two-step reaction is adopted, the generation amount of alpha-components and beta-components can be effectively controlled, and the product quality is controllable. The single-furnace single-kettle stripping flash process also uses medium-temperature asphalt as a raw material, asphalt is heated in a tubular heating furnace, then the asphalt is reacted in a reaction kettle, the reaction is completed in one step, the reaction time is prolonged by a stripping tower or a modification kettle after the reaction, and a modified asphalt product is obtained, but the product quality control is not flexible in a double-furnace double-kettle process.

The production process of modified asphalt by a tubular furnace heating method is a mainstream of the production process of modified asphalt due to large design capacity and flexible reaction control, and the existing modified asphalt reaction kettle basically adopts a vertical reaction kettle, and can realize ordered material inlet and outlet by feeding from the top and discharging from the lower part, thereby ensuring that all asphalt raw materials can have the same and sufficient residence time. The horizontal modification reaction kettle can be adopted if the materials can be orderly fed in and out and all the asphalt raw materials can be ensured to have the same and enough retention time, and even the process can be simplified, so that a better effect is achieved.

Disclosure of Invention

The invention provides a modified asphalt production system and a process adopting a horizontal reaction kettle, wherein a 1# reaction kettle, a 2# reaction kettle and a modified kettle adopt the horizontal reaction kettle, and baffle plates are arranged in the horizontal reaction kettle, so that the materials can be orderly fed in and out, and the same and enough residence time of all the materials can be ensured; can replace the conventional production system adopting a vertical reaction kettle, particularly in the full-flow discharge part of the reaction kettle, and can simplify the equipment configuration.

In order to achieve the purpose, the invention adopts the following technical scheme:

a modified asphalt production system adopting a horizontal reaction kettle comprises a double-furnace double-kettle modified asphalt production system consisting of a No. 1 reaction kettle, a No. 2 reaction kettle, a No. 1 tubular furnace and a No. 2 tubular furnace; the device also comprises a modification kettle arranged on a secondary modified asphalt outlet pipeline of the No. 2 reaction kettle, and the No. 1 reaction kettle, the No. 2 reaction kettle and the modification kettle are all horizontal reaction kettles.

And a plurality of baffle plates are arranged in the horizontal reaction kettle along the flowing direction of the asphalt.

The baffle plate consists of upper baffle plates and lower baffle plates which are alternately arranged at intervals, the top of each upper baffle plate is fixedly connected with the top wall of the horizontal reaction kettle, and a lower asphalt flow channel is formed between the bottom of each upper baffle plate and the bottom wall of the horizontal reaction kettle; the bottom of the lower baffle plate is fixedly connected with the bottom wall of the horizontal kettle, and an upper asphalt flow channel is formed between the top of the lower baffle plate and the top wall of the horizontal kettle.

A modified asphalt production system adopting a horizontal reaction kettle specifically comprises:

a raw material asphalt inlet is formed at one end of the top of the No. 1 reaction kettle, a primary modified asphalt outlet is formed at the other end of the No. 1 reaction kettle, and a circulating asphalt outlet is formed at the bottom of the other end of the No. 1 reaction kettle; the top of the No. 1 reaction kettle is provided with a plurality of flash evaporation oil gas outlets along the flowing direction of asphalt, and is connected with an external flash evaporation oil gas condensation cooler through a flash evaporation oil gas pipeline; a circulating asphalt outlet of the No. 1 reaction kettle is connected with a raw material asphalt inlet through a No. 1 circulating asphalt pipeline, and the No. 1 circulating asphalt pipeline is provided with a No. 1 modified asphalt circulating pump, a No. 1 tubular furnace and a medium-temperature asphalt inlet; a primary modified asphalt outlet of the No. 1 reaction kettle is connected with a primary modified asphalt conveying pipeline;

one end of the top of the 2# reaction kettle is provided with a primary modified asphalt inlet, the other end of the 2# reaction kettle is provided with a secondary modified asphalt outlet, and the bottom of the other end of the 2# reaction kettle is provided with a circulating asphalt outlet; the top of the No. 2 reaction kettle is provided with a plurality of flash evaporation oil gas outlets along the flowing direction of the asphalt, and the flash evaporation oil gas outlets are connected with an external flash evaporation oil gas condensation cooler through flash evaporation oil gas pipelines; a circulating asphalt outlet of the No. 2 reaction kettle is connected with a first modified asphalt inlet through a No. 2 circulating asphalt pipeline, a No. 2 modified asphalt circulating pump, a No. 2 tube furnace and a first modified asphalt inlet are arranged on the No. 2 circulating asphalt pipeline, and the first modified asphalt inlet is connected with a first modified asphalt conveying pipeline; a secondary modified asphalt outlet of the 2# reaction kettle is connected with a secondary modified asphalt conveying pipeline;

one end of the top of the modifying kettle is provided with a secondary modified asphalt inlet, the top of the modifying kettle is provided with a plurality of flash evaporation oil gas outlets along the flowing direction of asphalt, and the flash evaporation oil gas outlets are connected with an external flash evaporation oil gas condensation cooler through flash evaporation oil gas pipelines; the bottom of the other end of the modified kettle is provided with a modified asphalt outlet which is connected with an external falling film cooler through a modified asphalt conveying pipeline, and the modified asphalt conveying pipeline is provided with a modified asphalt output pump.

The raw material asphalt inlet, the primary modified asphalt inlet and the secondary modified asphalt inlet are respectively provided with an inlet pipe, and the inlet pipes are downwards inserted into the bottoms of the corresponding 1# reaction kettle, the corresponding 2# reaction kettle and the corresponding modified kettle.

At least 2 asphalt full-flow pipes are arranged at the primary modified asphalt outlet along the height direction, and a No. 1 full-flow valve is respectively arranged on each of the 2 asphalt full-flow pipes; at least 2 asphalt full-flow pipes are arranged at the secondary modified asphalt outlet along the height direction, and 2# full-flow valves are respectively arranged on the 2 asphalt full-flow pipes;

and a liquid level recording and adjusting instrument is arranged at one end of the modified kettle, a liquid level adjusting valve is arranged on the modified asphalt conveying pipeline, and the liquid level recording and adjusting instrument and the liquid level adjusting valve are controlled in an interlocking manner.

The setting heights of the No. 1 reaction kettle, the No. 2 reaction kettle and the modification kettle are gradually reduced.

A production process of modified asphalt by using a horizontal reaction kettle comprises the following steps:

1) mixing raw material medium temperature asphalt with outlet asphalt of a No. 1 tubular furnace, and feeding the mixture into a No. 1 reaction kettle for primary modification reaction; the temperature in the No. 1 reaction kettle is controlled to be 360-400 ℃, and the asphalt mainly undergoes a beta-modification reaction; flash oil gas generated by the reaction cracking is discharged to an external flash oil gas condensation cooler through a plurality of flash oil gas outlets at the top of the No. 1 reaction kettle; the asphalt enters the bottom of one end of the No. 1 reaction kettle, and reaches the other end after being baffled by a plurality of baffle plates, so that the primary modification process is completed; most of the primary modified asphalt is pumped out from the bottom of the No. 1 reaction kettle by a No. 1 modified asphalt circulating pump, sent to a No. 1 tubular furnace for heating, mixed with the raw material medium-temperature asphalt and then circulated back to the No. 1 reaction kettle; a small part of the primary modified asphalt flows out through the full flow pipe, automatically flows into a No. 2 reaction kettle, and selects a full flow pipe with a corresponding height through a No. 1 full flow valve according to the amount of the raw material asphalt to be treated;

2) controlling the temperature in the 2# reaction kettle to be 380-420 ℃, and simultaneously carrying out alpha-modification reaction and beta-modification reaction in the 2# reaction kettle; the primary modified asphalt and the circulating asphalt in the No. 2 reaction kettle pass through a No. 2 modified asphalt circulating pump, are heated by a No. 2 tubular furnace and then enter the No. 2 reaction kettle for secondary modification reaction; flash oil gas generated by the reaction cracking is discharged to an external condensation cooler through a plurality of flash oil gas outlets at the top of the 2# reaction kettle; the asphalt enters the bottom of one end of the 2# reaction kettle and reaches the other end after being baffled by a plurality of baffle plates, so that the secondary modification process is completed; most of secondary modified asphalt is pumped out from the bottom by a 2# modified asphalt circulating pump, sent to a 2# tubular furnace together with primary modified asphalt sent out from a 1# reaction kettle in full flow for heating, and then circulated back to a 2# reaction kettle for secondary modification reaction; a small part of secondary modified asphalt flows out through the full flow pipe, automatically flows to the modifying kettle, and selects a full flow pipe with a corresponding height through a No. 2 full flow valve according to the treated asphalt amount;

3) in the modification kettle, the residual heat of the asphalt is utilized, the modification reaction is continuously carried out by prolonging the residence time of the secondary modified asphalt, and flash oil gas generated by the reaction cracking is discharged to an external condensing cooler through a plurality of flash oil gas outlets at the top of the modification kettle; the secondary modified asphalt enters from the bottom of one end of the modified kettle, is deflected by a plurality of baffle plates and reaches the other end, is interlocked and controlled by a liquid level recording and adjusting instrument and a liquid level adjusting valve, keeps the liquid level of the modified kettle constant, realizes the same discharge quantity and feed quantity of the modified asphalt, and is output and pumped to an external falling film cooler by the modified asphalt.

Compared with the prior art, the invention has the beneficial effects that:

1) after the horizontal reaction kettle is adopted, the arrangement heights of the 1# reaction kettle, the 2# reaction kettle and the modification kettle are sequentially decreased progressively, and the full-flow discharging configuration of each reaction kettle is more convenient and reasonable;

2) compared with a vertical reaction kettle, the liquid level height of the horizontal reaction kettle is greatly reduced, the liquid level can be measured by a common floating ball liquid level meter, and the cost is saved.

Drawings

FIG. 1 is a schematic structural diagram of an improved asphalt production system using a horizontal reaction vessel according to the present invention.

In the figure: 1.1 # reaction kettle 2.2 # reaction kettle 3, modified kettle 4.1 # tubular furnace 5.2 # tubular furnace 6.1 # modified asphalt circulating pump 7.2 # modified asphalt circulating pump 8, modified asphalt output pump 9.1 # full flow valve 10.2 # full flow valve 11, baffle plate 12, liquid level regulating valve 13, inlet pipe LRC01, liquid level recording and regulating instrument

Detailed Description

The following further describes embodiments of the present invention with reference to the accompanying drawings:

as shown in fig. 1, the system for producing modified asphalt using a horizontal reaction vessel according to the present invention includes a two-furnace two-vessel modified asphalt production system composed of a # 1 reaction vessel 1, a # 2 reaction vessel 2, a # 1 tubular furnace 4, and a # 2 tubular furnace 5; the device also comprises a modifying kettle 3 arranged on a secondary modified asphalt outlet pipeline of the No. 2 reaction kettle 2, wherein the No. 1 reaction kettle 1, the No. 2 reaction kettle 2 and the modifying kettle 3 are all horizontal reaction kettles.

And a plurality of baffle plates 11 are arranged in the horizontal reaction kettle along the flowing direction of the asphalt.

The baffle plate 11 consists of upper baffle plates and lower baffle plates which are alternately arranged at intervals, the top of each upper baffle plate is fixedly connected with the top wall of the horizontal reaction kettle, and a lower asphalt flow channel is formed between the bottom of each upper baffle plate and the bottom wall of the horizontal reaction kettle; the bottom of the lower baffle plate is fixedly connected with the bottom wall of the horizontal kettle, and an upper asphalt flow channel is formed between the top of the lower baffle plate and the top wall of the horizontal kettle.

A modified asphalt production system adopting a horizontal reaction kettle specifically comprises:

one end of the top of the No. 1 reaction kettle 1 is provided with a raw material asphalt inlet, the other end of the No. 1 reaction kettle is provided with a primary modified asphalt outlet, and the bottom of the other end of the No. 1 reaction kettle 1 is provided with a circulating asphalt outlet; the top of the No. 1 reaction kettle 1 is provided with a plurality of flash evaporation oil gas outlets along the flowing direction of asphalt, and is connected with an external flash evaporation oil gas condensation cooler through a flash evaporation oil gas pipeline; a circulating asphalt outlet of the No. 1 reaction kettle 1 is connected with a raw material asphalt inlet through a No. 1 circulating asphalt pipeline, and a No. 1 modified asphalt circulating pump 6, a No. 1 tubular furnace 4 and a medium-temperature asphalt inlet are arranged on the No. 1 circulating asphalt pipeline; a primary modified asphalt outlet of the No. 1 reaction kettle 1 is connected with a primary modified asphalt conveying pipeline;

a primary modified asphalt inlet is arranged at one end of the top of the 2# reaction kettle 2, a secondary modified asphalt outlet is arranged at the other end of the 2# reaction kettle 2, and a circulating asphalt outlet is arranged at the bottom of the other end of the 2# reaction kettle 2; the top of the No. 2 reaction kettle 2 is provided with a plurality of flash evaporation oil gas outlets along the flowing direction of the asphalt, and is connected with an external flash evaporation oil gas condensation cooler through a flash evaporation oil gas pipeline; a circulating asphalt outlet of the No. 2 reaction kettle 2 is connected with a first modified asphalt inlet through a No. 2 circulating asphalt pipeline, a No. 2 modified asphalt circulating pump 7, a No. 2 pipe furnace 5 and a first modified asphalt inlet are arranged on the No. 2 circulating asphalt pipeline, and the first modified asphalt inlet is connected with a first modified asphalt conveying pipeline; a secondary modified asphalt outlet of the 2# reaction kettle 2 is connected with a secondary modified asphalt conveying pipeline;

a secondary modified asphalt inlet is formed in one end of the top of the modifying kettle 3, a plurality of flash evaporation oil gas outlets are formed in the top of the modifying kettle 3 along the flowing direction of asphalt, and the flash evaporation oil gas outlets are connected with an external flash evaporation oil gas condensation cooler through flash evaporation oil gas pipelines; the bottom of the other end of the modified kettle 3 is provided with a modified asphalt outlet which is connected with an external falling film cooler through a modified asphalt conveying pipeline, and the modified asphalt conveying pipeline is provided with a modified asphalt output pump 8.

The raw material asphalt inlet, the primary modified asphalt inlet and the secondary modified asphalt inlet are respectively provided with an inlet pipe 13, and the inlet pipes 13 are downwards inserted into the bottoms of the corresponding 1# reaction kettle 1, the corresponding 2# reaction kettle 2 and the corresponding modified kettle 3.

At least 2 asphalt full-flow pipes are arranged at the primary modified asphalt outlet along the height direction, and a No. 1 full-flow valve 9 is respectively arranged on each of the 2 asphalt full-flow pipes; at least 2 asphalt full-flow pipes are arranged at the secondary modified asphalt outlet along the height direction, and 2# full-flow valves 10 are respectively arranged on the 2 asphalt full-flow pipes;

a liquid level recording and adjusting instrument LRC01 is arranged at one end of the modifying kettle 3, a liquid level adjusting valve 12 is arranged on the modified asphalt conveying pipeline, and the liquid level recording and adjusting instrument LRC01 and the liquid level adjusting valve 12 are controlled in an interlocking mode.

The setting heights of the No. 1 reaction kettle 1, the No. 2 reaction kettle 2 and the modifying kettle 3 are gradually reduced.

A production process of modified asphalt by using a horizontal reaction kettle comprises the following steps:

1) mixing raw material medium temperature asphalt with outlet asphalt of a No. 1 tubular furnace 4, and feeding the mixture into a No. 1 reaction kettle 1 for primary modification reaction; the temperature in the No. 1 reaction kettle 1 is controlled to be 360-400 ℃, and the asphalt mainly undergoes a beta-modification reaction; flash oil gas generated by the reaction cracking is discharged to an external flash oil gas condensation cooler through a plurality of flash oil gas outlets at the top of the No. 1 reaction kettle 1; asphalt enters the bottom of one end of the No. 1 reaction kettle 1, is baffled by a plurality of baffle plates 11 and then reaches the other end, and a primary modification process is completed; most of the primary modified asphalt is pumped out from the bottom of the No. 1 reaction kettle 1 through a No. 1 modified asphalt circulating pump 6, sent to a No. 1 tubular furnace 4 for heating, mixed with the raw material medium-temperature asphalt and then circulated back to the No. 1 reaction kettle 1; a small part of the primary modified asphalt flows out through the full flow pipe, automatically flows into the No. 2 reaction kettle 2, and the full flow pipe with the corresponding height is selected through the No. 1 full flow valve 9 according to the amount of the treated raw material asphalt;

2) controlling the temperature in the 2# reaction kettle 2 to be 380-420 ℃, and simultaneously carrying out alpha-modification reaction and beta-modification reaction in the 2# reaction kettle 2; the primary modified asphalt and the circulating asphalt in the No. 2 reaction kettle 2 pass through a No. 2 modified asphalt circulating pump 7, are heated by a No. 2 tubular furnace 5, and then enter the No. 2 reaction kettle 2 for secondary modification reaction; flash oil gas generated by the reaction cracking is discharged to an external condensation cooler through a plurality of flash oil gas outlets at the top of the 2# reaction kettle; the asphalt enters the bottom of one end of the 2# reaction kettle 2 and reaches the other end after being baffled by a plurality of baffle plates 11, so that the secondary modification process is completed; most of the secondary modified asphalt is pumped out from the bottom by a 2# modified asphalt circulating pump 7, sent to a 2# tubular furnace 5 together with the primary modified asphalt sent out from the 1# reaction kettle 1 in full flow for heating, and then circulated back to a 2# reaction kettle 2 for secondary modification reaction; a small part of secondary modified asphalt flows out through the full flow pipe and automatically flows to the modifying kettle 3, and the full flow pipe with the corresponding height is selected through a No. 2 full flow valve 10 according to the treated asphalt amount;

3) in the modification kettle 3, the residual heat of the asphalt is utilized, the modification reaction is continuously carried out by prolonging the residence time of the secondary modified asphalt, and flash oil gas generated by the reaction cracking is discharged to an external condensing cooler through a plurality of flash oil gas outlets at the top of the modification kettle 3; the secondary modified asphalt enters from the bottom of one end of the modified kettle 3, is deflected by a plurality of baffle plates 11 and reaches the other end, is interlocked and controlled by a liquid level recording and adjusting instrument LRC01 and a liquid level adjusting valve 12, keeps the liquid level of the modified kettle 3 constant, realizes the same discharge quantity and feed quantity of the modified asphalt, and sends the modified asphalt to an external falling film cooler by a modified asphalt output pump 8.

In the modified asphalt production system adopting the horizontal reaction kettle, the 1# reaction kettle, the 2# reaction kettle and the modified kettle adopt the horizontal reaction kettle, a plurality of baffle plates are additionally arranged in the horizontal reaction kettle, the baffle plates comprise a plurality of upper baffle plates and a plurality of lower baffle plates which are alternately arranged, and the reaction kettle is divided into a plurality of parts along the length direction; the two parts separated by the upper baffle plate are communicated through a lower asphalt flow channel, and the two parts separated by the lower baffle plate are communicated through an upper asphalt flow channel; the feeding material enters from the bottom of one end of the horizontal reaction kettle (realized by an inlet pipe), flows to the other side through the upper asphalt flow channel of the lower baffle plate in a full mode, and flows to the other side through the lower asphalt flow channel of the upper baffle plate; through several times of such processes, the ordered inlet and outlet of materials can be realized, namely the materials are firstly discharged first and then discharged last, and all the asphalt raw materials can be ensured to have the same and enough residence time.

In the invention, the amount of the primary modified asphalt in the No. 1 reaction kettle for circulation is about 8 times of the full-flow discharge amount, the amount of the secondary modified asphalt in the No. 2 reaction kettle for circulation is about 8 times of the full-flow discharge amount, and the primary modified asphalt and the secondary modified asphalt for circulation are discharged from the bottom of the other end opposite to the feeding end, so that the residence time is satisfied and the stability of the circulation heating flow is ensured. The liquid level in the modifying kettle is controlled to be constant by the liquid level regulating valve and the liquid level recording regulating instrument, so that the discharge amount of the modifying kettle is equivalent to the feeding amount of the secondary modified asphalt.

1# reation kettle 1 sets up on 2 layers of frame, and 2# reation kettle 1 sets up on 1 layers of frame, and modification cauldron 3 sets up subaerial, and configuration equipment can satisfy the technological requirement of reation kettle full flow ejection of compact difference in height like this.

The mode of full flow ejection of compact is all adopted to 1# reation kettle, 2# reation kettle, according to the dwell time of predesign needs, set up a plurality of full flow mouths, confirm the reaction dwell time of first modified pitch or secondary modified pitch through full flow height, need not liquid level control instrument or weight control instrument, solved because the pitch characteristic makes the unstable problem of the pitch outflow that liquid level measurement difficulty and weight measurement are inaccurate to lead to for reation kettle's operation can be smooth and easy, the clear progress.

The following examples are carried out on the premise of the technical scheme of the invention, and detailed embodiments and specific operation processes are given, but the scope of the invention is not limited to the following examples. The methods used in the following examples are conventional methods unless otherwise specified.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.