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Tecnique for producing mesothermal and modified asphaltum in intermittent single kettle type

A production process and technology for improving asphalt, which is applied in the direction of processing tar asphalt/petroleum asphalt/natural asphalt by distillation, which can solve the problems of unsuitable small production enterprises, complex production process, large equipment scale, etc. Technical operation control, simple process effect

Inactive Publication Date: 2005-01-12
朱小花
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the modified asphalt produced by the multi-pot continuous production process has large processing capacity, high product quality, low energy consumption, and stable production operation, its disadvantages are large equipment investment, complex production process, and large equipment scale, which are not suitable for small production enterprises.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Coal tar raw material kettle heating water evaporation treatment, production kettle 24 cubic meters, built-in tar 27 tons, coal-burning waste gas heating 700 ℃, normal pressure, 8 hours, under normal pressure, the moisture content is measured as 3%;

[0023] (2) Control the temperature of the furnace to 850°C, start the vacuum pump in the kettle to form a negative pressure, that is, the vacuum degree of the distillation tower is 0.05Pa, continue to heat and distill, and cut out the three-mixed oil at a temperature of 240-260°C in the kettle, and use it at 300-310 After the anthracene oil is cut out at ℃, the temperature in the kettle is about 350℃, and when the softening point of the residue in the kettle is 85, the inside of the kettle is medium-temperature asphalt;

[0024] (3) Modified asphalt production: continue to heat and distill, the technical conditions are that the furnace temperature is 890°C, the negative pressure in the still, that is, the vacuum degree ...

Embodiment 2

[0027] (1) Coal tar raw material kettle heating water evaporation treatment, production kettle 24 cubic meters, built-in tar 27 tons, coal-fired waste gas heating 740 ℃, normal pressure, 9 hours, under normal pressure, the moisture content is measured as 2%;

[0028] (2) Control the temperature of the furnace to 830°C, start the vacuum pump in the kettle to form a negative pressure, that is, the vacuum degree of the distillation tower is 0.07Pa, continue to heat and distill, and cut out the three-mixed oil at a temperature of 240-260°C in the kettle, and use it at 300-310°C After the anthracene oil is cut out at ℃, the temperature in the kettle is about 355℃, and when the softening point of the residue in the kettle is 90℃, the inside of the kettle is medium-temperature asphalt;

[0029] (3) Modified asphalt production: continue to heat and distill, the technical conditions are that the furnace temperature is 895°C, the negative pressure in the still, that is, the vacuum degree...

Embodiment 3

[0032] (1) Coal tar raw material kettle heating water evaporation treatment, production kettle 24 cubic meters, built-in tar 27 tons, coal-fired waste gas heating 650 ℃, normal pressure, 10 hours, under normal pressure, the moisture content is measured as 5%;

[0033] (2) Control the temperature of the furnace to 890°C, start the vacuum pump in the kettle to form a negative pressure, that is, the vacuum degree of the distillation tower is 0.075Pa, continue to heat and distill, and cut out the three-mixed oil at a temperature of 240-260°C in the kettle, and use it at 300-310°C After the anthracene oil is cut out, the temperature in the kettle is about 345℃, and when the softening point of the residue in the kettle is 88℃, the inside of the kettle is medium-temperature asphalt;

[0034] (3) Modified asphalt production: continue to heat and distill, the technical conditions are that the furnace temperature is 880°C, the negative pressure in the still, that is, the vacuum degree of...

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Abstract

A method for preparing mesotherm and modified asphalt in single tower at onece time includes dewatering coal tar material to be water content less than or equal to 5%, heating hearth temperature to be 800-900 deg.C for causing negative pressure at interval tower with vacuum degree of 0.04-0.075 Pa, heating and distilling to extract out trivalent oil and anthrasol, obtaing mesotherm asphalt by cooling residue and heating mesotherm asphalt to obtain modified asphalt through cooling.

Description

technical field [0001] The invention relates to the technology of producing asphalt from tar, in particular to the process of producing medium-temperature asphalt and modified asphalt by intermittent single-pot thermal polymerization of coal tar under negative pressure conditions. Background technique [0002] At present, the method of producing medium-temperature asphalt adopts the intermittent single-pot process, that is, the dehydration is completed in a single vessel, the distilled fraction is extracted, and the residue in the vessel is cooled and solidified to produce medium-temperature asphalt. The traditional method has two deficiencies. First, the production cycle is long, generally 50-55 hours; second, because the furnace temperature does not meet the requirements, and the kettle is prone to coking, the medium-temperature asphalt cannot be continuously modified to produce modified asphalt in a single kettle. [0003] At present, the production of modified asphalt ma...

Claims

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Application Information

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IPC IPC(8): C10C3/06
Inventor 朱小花
Owner 朱小花
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