A tar pretreatment device for improving the toluene insoluble content index

Abstract

This utility model relates to the field of tar treatment equipment, specifically to a tar pretreatment device for improving the toluene-insoluble content index. It includes a pressurized polymerization tower and a fractionation tower. The pressurized polymerization tower has a discharge pipe at its bottom, connected to a delivery pump. The delivery pump is connected to a heating mechanism, which has a delivery pipe connected to the pressurized polymerization tower. The pressurized polymerization tower has a regulating pipe connected to the fractionation tower, and a regulating valve is installed on the regulating pipe. The fractionation tower has a top discharge valve, a bottom discharge valve, and a side discharge valve at its top, bottom, and side ends, respectively. This utility model effectively reduces the carbon-hydrogen ratio of components in the tar and improves the levels of toluene-insoluble content, quinoline-insoluble content, and coking value in modified asphalt.

Description

Technical Field

[0001] This utility model relates to the field of tar treatment equipment, specifically to a tar pretreatment device for improving the toluene insoluble matter index. Background Technology

[0002] The impact of different coking coals and coking processes on asphalt quality: Coal tar is classified into low-temperature coal tar (450-550 degrees Celsius), typically produced by coal pyrolysis projects; medium-temperature coal tar (550-750 degrees Celsius), typically produced by coal-to-coke, coal-to-gas, Lurgi gasification, etc.; and high-temperature coal tar (750-1200 degrees Celsius), produced during the coking process. Compared to high-temperature coal tar, low-temperature and medium-temperature coal tar has characteristics such as lower carbon content, higher hydrogen content, higher oxygen content, lower sulfur content, higher phenol content, and more light components. Asphalt produced from low-temperature and medium-temperature coal tar, under the same softening point, has a significantly higher carbon-to-hydrogen ratio than that produced from high-temperature coal tar, and the aromatic hydrocarbon content in the asphalt is significantly increased.

[0003] Toluene-insoluble matter refers to the amount of pitch that is insoluble in toluene. It mainly includes two categories: primary toluene-insoluble matter (derived from tar) and secondary toluene-insoluble matter (produced during tar processing due to repolymerization caused by increased temperature and pressure). Currently, the toluene content in coal tar produced by chemical enterprises is generally below 3%, resulting in low toluene-insoluble matter content in modified pitch produced by existing production facilities. Therefore, it is necessary to design a tar pretreatment device to improve the toluene-insoluble matter content. Summary of the Invention

[0004] The purpose of this invention is to provide a tar pretreatment device that improves the toluene insoluble content index, which has the advantage of improving the toluene insoluble content index.

[0005] The technical solution adopted is as follows:

[0006] A tar pretreatment device for improving the toluene insoluble matter index includes a pressurized polymerization tower and a fractionation tower. The bottom of the pressurized polymerization tower is provided with a discharge pipe, which is connected to a delivery pump. The delivery pump is connected to a heating mechanism, which is provided with a delivery pipe connected to the pressurized polymerization tower. The pressurized polymerization tower is provided with a regulating pipe and an oil-gas pipe connected to the fractionation tower. A regulating valve is provided on the regulating pipe. The top, bottom, and side of the fractionation tower are respectively provided with a top discharge valve, a bottom discharge valve, and a side discharge valve.

[0007] Preferably, the heating mechanism is a tubular furnace.

[0008] Preferably, the top discharge valve is connected to a solid-liquid separation device.

[0009] Preferably, the delivery pump is a gear-driven residual oil pump.

[0010] Compared to existing technologies, the advantages are:

[0011] This invention involves feeding tar into a pressurized polymerization tower for pressurized polymerization modification, followed by fractionation in a distillation tower. This effectively reduces the carbon-hydrogen ratio of the components in the tar and improves the levels of toluene-insoluble matter, quinoline-insoluble matter, and coking value in the modified asphalt. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of a tar pretreatment device for improving the toluene insoluble matter index according to this utility model.

[0013] Figure 2 This is a front view schematic diagram of a tar pretreatment device for improving the toluene insoluble matter index according to this utility model.

[0014] Figure 3 This is a top view schematic diagram of a tar pretreatment device for improving the toluene insoluble matter index according to this utility model.

[0015] In the diagram: 1. Pressurized polymerization tower; 2. Fractionation tower; 3. Discharge pipe; 4. Transfer pump; 5. Heating mechanism; 6. Transfer pipe; 7. Regulating pipe; 8. Oil and gas pipe; 9. Regulating valve; 10. Top discharge valve; 11. Bottom discharge valve; 12. Side discharge valve; 13. Solid-liquid separation device. Detailed Implementation

[0016] The present invention will be further described below with reference to specific embodiments, such as... Figures 1 to 3 As shown:

[0017] Example 1: A tar pretreatment device for improving the toluene insoluble matter index includes a pressurized polymerization tower 1 and a fractionation tower 2. The bottom of the pressurized polymerization tower 1 is provided with a discharge pipe 3, which is connected to a transfer pump 4. The transfer pump 4 is connected to a heating mechanism 5. The heating mechanism 5 is provided with a transfer pipe 6 connected to the pressurized polymerization tower 1. The discharge pipe 3 discharges the tar at the bottom of the pressurized polymerization tower 1 into the heating mechanism 5. The heating mechanism 5 heats the tar to 400°C and then sends it to the heated polymerization tower for pressurized polymerization.

[0018] The heating polymerization tower is equipped with a regulating pipe 7 and an oil and gas pipe 8 connected to the fractionation tower 2. A regulating valve 9 is installed on the regulating pipe 7. A top discharge valve 10, a bottom discharge valve 11, and a side discharge valve 12 are respectively installed at the top, bottom, and side ends of the fractionation tower 2. The tar at the bottom of the pressurized polymerization tower 1 flows into the fractionation tower 2 by gravity through the regulating valve 9. The oil and gas at the top of the pressurized polymerization tower 1 enters the bottom of the fractionation tower 2 through the oil and gas pipe 8 to strip the tar.

[0019] Light oil and non-condensable gas produced at the top of fractionation tower 2 are discharged and collected through top discharge valve 10. Asphalt is produced at the bottom discharge valve 11, and anthracene oil and mixed oil are discharged through side discharge valve 12. The tar is fed into pressurized polymerization tower 1 for pressurized polymerization modification, and then enters fractionation tower 2 for fractionation. This effectively reduces the carbon-hydrogen ratio of the components in the tar and improves the indicators of toluene insoluble matter, quinoline insoluble matter, and coking value of the modified asphalt.

[0020] Example 2: A tar pretreatment device for improving the toluene insoluble content index includes a pressurized polymerization tower 1 and a fractionation tower 2. The bottom of the pressurized polymerization tower 1 is provided with a discharge pipe 3, which is connected to a transfer pump 4. The transfer pump 4 is a gear residue oil pump. The transfer pump 4 is connected to a heating mechanism 5. The heating mechanism 5 is provided with a transfer pipe 6 connected to the pressurized polymerization tower 1. The heating mechanism 5 is a tubular heater. The discharge pipe 3 discharges the tar at the bottom of the pressurized polymerization tower 1 into the heating mechanism 5. The heating mechanism 5 heats the tar to 400°C and then sends it to the heating polymerization tower for pressurized polymerization.

[0021] The heating polymerization tower is equipped with a regulating pipe 7 and an oil and gas pipe 8 connected to the fractionation tower 2. A regulating valve 9 is installed on the regulating pipe 7. A top discharge valve 10, a bottom discharge valve 11, and a side discharge valve 12 are respectively installed at the top, bottom, and side ends of the fractionation tower 2. The tar at the bottom of the pressurized polymerization tower 1 flows into the fractionation tower 2 by gravity through the regulating valve 9. The oil and gas at the top of the pressurized polymerization tower 1 enters the bottom of the fractionation tower 2 through the oil and gas pipe 8 to strip the tar.

[0022] Light oil and non-condensable gas produced at the top of the fractionation tower 2 are discharged and collected through the top discharge valve 10. The top discharge valve 10 is connected to a solid-liquid separation device 13, which separates the light oil and non-condensable gas. The bottom discharge valve 11 at the bottom of the fractionation tower 2 produces asphalt, and the side discharge valve 12 discharges anthracene oil and tri-mixed oil.

[0023] The working principle is as follows:

[0024] Dehydrated tar is fed into pressurized polymerization tower 1 for pressurized polymerization modification. The tar at the bottom of pressurized polymerization tower 1 is discharged into heating mechanism 5, which heats the tar to 400°C. After heating, the tar is sent to heating polymerization tower for pressurized polymerization, and then enters fractionation tower 2 for fractionation. The tar at the bottom of pressurized polymerization tower 1 flows into fractionation tower 2 by gravity through regulating valve 9. The oil and gas at the top of pressurized polymerization tower 1 enters the bottom of fractionation tower 2 through oil and gas pipe 8 to strip the tar, effectively reducing the carbon-hydrogen ratio of the components in the tar and improving the indicators of toluene insoluble matter, quinoline insoluble matter, and coking value of modified asphalt.

[0025] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A tar pretreatment device for improving the toluene insolubles index, characterized by: The system includes a pressurized polymerization tower (1) and a fractionation tower (2). The bottom of the pressurized polymerization tower (1) is provided with a discharge pipe (3). The discharge pipe (3) is connected to a delivery pump (4). The delivery pump (4) is connected to a heating mechanism (5). The heating mechanism (5) is provided with a delivery pipe (6) connected to the pressurized polymerization tower (1). The heated polymerization tower is provided with a regulating pipe (7) and an oil and gas pipe (8) connected to the fractionation tower (2). A regulating valve (9) is provided on the regulating pipe (7). The top, bottom and side of the fractionation tower (2) are respectively provided with a top discharge valve (10), a bottom discharge valve (11) and a side discharge valve (12).

2. A tar pre-treatment apparatus for improving the toluene insolubles index as claimed in claim 1, characterized in that: The heating mechanism (5) is a tubular heating furnace.

3. The tar pretreatment device for improving the toluene insoluble matter index as described in claim 1, characterized in that: The top discharge valve (10) is connected to a solid-liquid separation device (13).

4. The tar pretreatment device for improving the toluene insoluble matter index as described in claim 1, characterized in that: The aforementioned delivery pump (4) is a gear-driven sludge oil pump.

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