Modified asphalt preparation device adopting horizontal modification reaction kettle

Abstract

The utility model belongs to the technical field of asphalt modification, and particularly relates to a modified asphalt preparation device adopting a horizontal modification reaction kettle, which is characterized by comprising a 1 # reaction kettle, a 2 # reaction kettle, a 1 # tubular furnace, a 2 # tubular furnace, a 1 # modified asphalt circulating pump, a 2 # modified asphalt circulating pump, a baffle plate, a full flow pipe, a liquid level regulating valve I and a liquid level regulating valve II, the horizontal reaction kettle with the compartment is adopted, so that orderly feeding and discharging of materials are realized, and it is ensured that all asphalt raw materials have the same and enough residence time. Compared with the prior art, the horizontal reaction kettle disclosed by the utility model has the beneficial effects that the horizontal reaction kettle with an improved structure is adopted and is internally provided with the baffle and the full-flow pipe, so that materials can be orderly fed and discharged, all asphalt raw materials can be ensured to have the same and enough retention time, the existing vertical reaction kettle can be completely replaced, the process substitutability is good, and the horizontal reaction kettle is arranged on the ground; and a frame is not needed, and the submerged pump replaces a high-end horizontal centrifugal pump, so that the investment cost is greatly saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of asphalt modification, and in particular relates to a modified asphalt preparation device using a horizontal modification reactor. Background Art

[0002] Generally, about 50% to 60% of asphalt is produced during the processing of coal tar, which is a major product of tar processing. The larger the processing scale, the more asphalt is produced. Modified asphalt is currently the main downstream product of asphalt, mainly used in the production of prebaked anodes in the electrolytic aluminum industry, and the preparation of battery rods or electrode binders. At present, the production process of modified asphalt in China mostly adopts the thermal polycondensation method, which can be divided into the kettle heating method and the tubular furnace heating method according to the heating method.

[0003] The modified asphalt production process of the kettle heating method uses medium-temperature asphalt as raw material. The outer surface of the reactor is directly heated by the heating furnace. The purpose of asphalt modification is achieved by controlling a certain reaction residence time and an appropriate reaction temperature in the reactor. Since the heating surface is the outer surface of the reactor, in order to achieve good mass and heat transfer effects, an agitator must be installed in the reactor, which limits the volume of the reactor and the design capacity.

[0004] The modified asphalt production process of the tubular furnace heating method uses medium-temperature asphalt as raw material, heats the asphalt in a tubular heating furnace, and then performs a modification reaction in a reactor; the reaction is carried out in two steps, and a modified asphalt product is obtained after the reaction. The advantage of this process is that the two-step reaction can effectively control the amount of α-component and β-component generated, and the product quality is controllable. The single-furnace single-kettle stripping flash process also uses medium-temperature asphalt as raw material, heats the asphalt in a tubular heating furnace, and then reacts in a reactor. After the reaction is completed in one step, a modified asphalt product is obtained, but the product quality control is not as flexible as the double-furnace double-kettle process.

[0005] The modified asphalt production process of tubular furnace heating method has become the mainstream of modified asphalt production process due to its large design capacity and flexible reaction control. At present, all modified asphalt reactors are vertical reactors, with top feeding and bottom discharge, which can achieve orderly entry and exit of materials and ensure that all asphalt raw materials can have the same sufficient residence time. Horizontal modified reactors can also be used if they can achieve orderly entry and exit of materials and ensure that all asphalt raw materials can have the same sufficient residence time, and even simplify the process to achieve better results.

[0006] The Chinese patent with the authorization number CN214571727U discloses a "modified asphalt production system using a horizontal reactor". The improved horizontal reactor is used to achieve orderly entry and exit of materials, and can ensure that all asphalt raw materials can have the same sufficient residence time, achieving the same effect as the vertical reactor. There are two shortcomings in this process. First, the current modified asphalt circulation pump uses an imported centrifugal pump with a double-end mechanical seal and an auxiliary oil station, which is expensive; second, the reactor must be set on a frame, using the height difference of the liquid level as the power of physical flow, and the construction cost is high. Utility Model Content

[0007] The purpose of the utility model is to provide a modified asphalt preparation device using a horizontal modified reactor, which overcomes the shortcomings of the prior art and adopts a horizontal reactor with an improved structure, which can realize the orderly entry and exit of materials and ensure that all asphalt raw materials can have the same sufficient residence time, completely replacing the existing vertical reactor and saving investment.

[0008] To achieve the above purpose, the utility model is implemented through the following technical solutions:

[0009] A modified asphalt preparation device using a horizontal modified reactor, comprising a 1# reactor, a 2# reactor, a 1# tubular furnace, a 2# tubular furnace, a 1# modified asphalt circulating pump, a 2# modified asphalt circulating pump, a baffle, a full flow pipe, a first liquid level regulating valve and a second liquid level regulating valve, wherein the 1# reactor and the 2# reactor are both horizontal reactors, each of which is provided with at least three compartments, a baffle is provided between adjacent compartments, the compartments include a feed chamber, a full flow chamber and a discharge chamber, a feed pipe is provided in the feed chamber, and the bottom end of the feed pipe opens at the lower part of the feed chamber; a full flow pipe is provided in the full flow chamber, the upper end inlet of the full flow pipe is flush with the upper edge of the baffle, and the bottom end outlet of the full flow pipe is located at the lower part of the full flow chamber; A 1# modified asphalt circulation pump or a 2# modified asphalt circulation pump is arranged in the material chamber; the feed pipe is connected to the outlet of the 1# tubular furnace or the 2# tubular furnace through a pipeline, and the outlet of the 1# modified asphalt circulation pump or the 2# modified asphalt circulation pump is connected to the inlet of the 1# tubular furnace or the 2# tubular furnace through a pipeline; a secondary modification diverter pipe is arranged between the outlet pipeline of the 1# modified asphalt circulation pump and the feed pipe of the 2# reactor, and a liquid level regulating valve 1 is arranged on the secondary modification diverter pipe; the feed pipe of the 1# reactor is connected to the medium-temperature asphalt supply pipe, and the discharge pipe of the 2# reactor is connected to the falling film cooler through a pipeline; the exhaust ports on the tops of the 1# reactor and the 2# reactor are connected to the condensation cooler through pipelines.

[0010] Furthermore, the No. 1 reactor and the No. 2 reactor are directly arranged on the ground without any lifting bracket.

[0011] Furthermore, the number of the full flow chambers is 2-3.

[0012] Furthermore, the bottom opening of the feed pipe is 30-100 mm away from the bottom of the feed chamber.

[0013] Furthermore, the bottom outlet of the full flow pipe is located 30-100 mm away from the bottom of the full flow chamber.

[0014] Furthermore, the ratio of the discharge chamber diameter to the full flow chamber diameter of the No. 1 reactor and the No. 2 reactor is 1:3.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1) The horizontal reactor with improved structure is equipped with baffles and full flow pipes inside, which can realize the orderly entry and exit of materials and ensure that all asphalt raw materials can have the same sufficient residence time. It can completely replace the existing vertical reactor and has good process substitutability;

[0017] 2) The horizontal reactor structure does not need to use the height difference of the liquid level as the driving force of physical flow. The equipment can be set on the ground without building a frame;

[0018] 3) The submersible pump in the horizontal reactor replaces the high-end horizontal centrifugal pump, which greatly saves investment costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a process flow chart of an embodiment of the utility model.

[0020] In the figure: 1-1# reactor, 2-2# reactor, 3-1# tubular furnace, 4-2# tubular furnace, 5-1# modified asphalt circulating pump, 6-2# modified asphalt circulating pump, 7-baffle, 8-full flow pipe, 9-liquid level regulating valve 1, 10-liquid level regulating valve 2, 11-feeding chamber, 12-full flow chamber, 13-discharging chamber, 14-feeding pipe, 15-secondary modified diverter pipe, 16-medium temperature asphalt supply pipe, LRC-liquid level recording and regulating instrument. DETAILED DESCRIPTION

[0021] The technical solution of the present utility model will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments.

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the specific embodiments required to be used in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the specific embodiments described below are some implementation methods of the utility model. For ordinary technicians in this field, other specific embodiments can be obtained based on these specific embodiments without paying creative work.

[0023] The components of the embodiments of the present invention generally described and shown in the specific embodiments herein can be arranged and designed in countless different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the specific embodiments is not intended to limit the scope of the utility model claimed, but only represents the selected embodiments of the utility model.

[0024] See Figure 1 , is a process flow chart of a modified asphalt preparation device using a horizontal modified reactor of the utility model, including 1# reactor 1, 2# reactor 2, 1# tubular furnace 3, 2# tubular furnace 4, 1# modified asphalt circulating pump 5, 2# modified asphalt circulating pump 6, baffle 7, full flow pipe 8, liquid level regulating valve 1 9 and liquid level regulating valve 2 10. Both 1# reactor 1 and 2# reactor 2 are horizontal reactors, which are provided with at least three compartments, and baffle 7 is provided between adjacent compartments. The compartments include a feed chamber 11, a full flow chamber 12 and a discharge chamber 13. Materials enter the feed chamber 11, the full flow chamber 12 and the discharge chamber 13 in sequence, which can realize the orderly entry and exit of materials, the latest feed can realize the last discharge, and can ensure that all asphalt raw materials can have the same sufficient residence time. A feed pipe 14 is provided in the feed chamber 11, and the bottom end of the feed pipe 14 opens at the lower part of the feed chamber 11; a full flow pipe 8 is provided in the full flow chamber 12, and the upper end inlet of the full flow pipe 8 is flush with the upper edge of the baffle 7, and the bottom end outlet of the full flow pipe 8 is located at the lower part of the full flow chamber 12; a 1# modified asphalt circulating pump 5 or a 2# modified asphalt circulating pump 6 is provided in the discharge chamber 13, and no full flow pipe is provided in the discharge chamber; the feed pipe 14 is connected to the outlet of the 1# tubular furnace 3 or the 2# tubular furnace 4 through a pipeline, and the 1# modified asphalt circulating pump 5 or the 2# modified asphalt circulating pump 6 is connected to the outlet of the 1# modified asphalt circulating pump 5 or the 2# modified asphalt circulating pump 6. The outlet of the circulation pump 6 is connected to the inlet of the 1# tubular furnace 3 or the 2# tubular furnace 4 through a pipeline; a secondary reforming shunt pipe 15 is provided between the outlet pipeline of the 1# modified asphalt circulation pump 5 and the feed pipe of the 2# reactor 2, and a liquid level regulating valve 9 is provided on the secondary reforming shunt pipe 15; the feed pipe of the 1# reactor 1 is connected to the medium-temperature asphalt supply pipe 16, and the discharge pipe of the 2# reactor 2 is connected to the falling film cooler through a pipeline; the top exhaust ports of the 1# reactor 1 and the 2# reactor 2 are connected to the condensing cooler through a pipeline. The ratio of the discharge chamber diameter of the 1# reactor and the 2# reactor to the full flow chamber diameter is 1:3, which can reduce the insertion depth of the submersible pump, reduce the difficulty of manufacturing the submersible pump, improve the operational stability of the submersible pump, and also reduce the cost. A liquid level recording and regulating instrument LRC-01 is provided in the discharge chamber 13 of the reactor to adjust and control the asphalt discharge amount of the reactor.

[0025] Reactor 1#1 and reactor 2#2 are directly placed on the ground without a lifting bracket. The number of full flow chambers 12 is 2. The bottom opening of the feed pipe 14 is 50 mm from the bottom of the feed chamber. The bottom outlet of the full flow pipe 8 is located 50 mm from the bottom of the full flow chamber. The ratio of the discharge chamber diameter of reactor 1#1 and reactor 2#2 to the full flow chamber diameter is 1:3.

[0026] The embodiment of the utility model realizes the orderly entry and exit of materials by adopting a horizontal reactor with compartments, and ensures that all asphalt raw materials have the same sufficient residence time. The specific operation steps are as follows: 1) primary reforming, the raw medium-temperature asphalt is first mixed with the asphalt at the outlet of the 1# tubular furnace 3, and enters the 1# reactor 1 together to complete the first reforming reaction. The temperature in the 1# reactor 1 is controlled at 380°C, and the asphalt mainly undergoes a β-reformation reaction. The oil and gas produced by the reaction cracking are discharged to the condenser cooler through the exhaust pipe on the top of the reactor. The materials flow from the feed chamber of the 1# reactor 1 to the discharge chamber in an orderly manner, and the modified asphalt is extracted by the 1# modified asphalt circulation pump 5. The amount of asphalt extracted by the 1# modified asphalt circulation pump 5 is equivalent to 8 times the feed amount of medium-temperature asphalt, which is sent to the 1# tubular furnace 3 for heating, and then circulated back to the 1# reactor 1 to heat the newly mixed medium-temperature asphalt for the first reforming reaction. A small part of the primary reformed asphalt is sent to the feed pipe of the 2# reactor 2 through the secondary reforming shunt pipe;

[0027] 2) Secondary modification: The temperature in the 2# reactor 2 is controlled at 400°C. The asphalt after the primary modification is mixed with the asphalt at the outlet of the 2# tubular furnace 4 and enters the 2# reactor 2 together for the second modification reaction. The asphalt undergoes α- and β-modification reactions at the same time. The oil and gas produced by the reaction cracking are discharged to the condenser cooler at the back through the top of the reactor. The materials flow orderly from the feed chamber of the 2# reactor 2 to the discharge chamber. The amount of modified asphalt extracted by the 2# modified asphalt circulation pump 6 is equivalent to 8 times the feed amount of the asphalt after the primary modification, which is sent to the 2# tubular furnace 4 for heating, and then circulated back to the 2# reactor 2 to heat the newly mixed asphalt for the second modification reaction. A small part of the secondary modified asphalt is sent to the falling film cooler through the pipeline where the liquid level regulating valve 2 10 is located.

[0028] The flow rates of the medium-temperature asphalt supply pipe and the pipelines where the liquid level regulating valve 1 9 and the liquid level regulating valve 2 10 are located are consistent. The ratio of the flow rate in the outlet pipeline of the 1# modified asphalt circulation pump 5 to the flow rate in the secondary modified diversion pipe is 8:1; the ratio of the flow rate in the outlet pipeline of the 2# modified asphalt circulation pump 6 to the flow rate in the pipeline where the liquid level regulating valve 2 10 is located is 8:1. The liquid levels of the 1# reactor 1 and the 2# reactor 2 are proportionally interlocked and controlled with the flow rates of the pipelines where the liquid level regulating valve 1 9 and the liquid level regulating valve 2 10 are located.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A modified asphalt preparation device using a horizontal modification reactor, characterized in that: It includes 1# reactor, 2# reactor, 1# tubular furnace, 2# tubular furnace, 1# modified asphalt circulating pump, 2# modified asphalt circulating pump, baffle, full flow pipe, liquid level regulating valve 1 and liquid level regulating valve 2. Both 1# reactor and 2# reactor are horizontal reactors, and at least three compartments are arranged inside them. Baffles are arranged between adjacent compartments. The compartments include a feed chamber, a full flow chamber and a discharge chamber. A feed pipe is arranged in the feed chamber, and the bottom end of the feed pipe opens at the lower part of the feed chamber; a full flow pipe is arranged in the full flow chamber, and the upper end inlet of the full flow pipe is flush with the upper edge of the baffle, and the bottom end outlet of the full flow pipe is located at the lower part of the full flow chamber; 1# modified asphalt is arranged in the discharge chamber Circulating pump or 2# modified asphalt circulating pump; the feed pipe is connected to the outlet of 1# tubular furnace or 2# tubular furnace through a pipeline, and the outlet of 1# modified asphalt circulating pump or 2# modified asphalt circulating pump is connected to the inlet of 1# tubular furnace or 2# tubular furnace through a pipeline; a secondary modified diverter pipe is arranged between the outlet pipeline of 1# modified asphalt circulating pump and the feed pipe of 2# reactor, and a liquid level regulating valve 1 is arranged on the secondary modified diverter pipe; the feed pipe of 1# reactor is connected to the medium-temperature asphalt supply pipe, and the discharge pipe of 2# reactor is connected to the falling film cooler through a pipeline; the exhaust ports on the tops of 1# reactor and 2# reactor are connected to the condensation cooler through pipelines.

2. The modified asphalt preparation device using a horizontal modification reactor according to claim 1, characterized in that: The No. 1 reactor and the No. 2 reactor are directly placed on the ground without any lifting brackets.

3. The modified asphalt preparation device using a horizontal modification reactor according to claim 1, characterized in that: The number of the full flow chambers is 2-3.

4. The modified asphalt preparation device using a horizontal modification reactor according to claim 1, characterized in that: The bottom opening of the feed pipe is 30-100 mm away from the bottom of the feed chamber.

5. The modified asphalt preparation device using a horizontal modification reactor according to claim 1, characterized in that: The bottom outlet of the full flow pipe is located 30-100 mm away from the bottom of the full flow chamber.

6. The modified asphalt preparation device using a horizontal modification reactor according to claim 1, characterized in that: The ratio of the discharge chamber diameter to the full flow chamber diameter of the No. 1 reactor and the No. 2 reactor is 1:3.

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