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A process for upgrading asphalt by flashing and maintaining pressure combined with electric tracing heating and maintaining temperature in retention tower

A technology for modifying asphalt and asphalt, which is applied in the processing of tar asphalt/petroleum asphalt/natural asphalt, heating processing of tar asphalt/petroleum asphalt/natural asphalt, petroleum industry, etc., and can solve the difficult to meet the requirements of asphalt temperature, etc problems, to achieve obvious energy-saving effect, high coking value, and good cohesiveness

Active Publication Date: 2017-03-15
HENAN KAITAN NEW MATERIAL +1
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Problems solved by technology

In the existing process, the raw material tar is centrifugally separated by a super centrifuge to remove coal dust, free carbon and water and then enters the dehydration tar tank. After ℃, it enters the dehydration tower, and the anhydrous tar dehydrated to less than 0.2% enters the convection section of the tube furnace and heats it to about 280°C, and then enters the fraction tower. Coking, the bitumen extracted from the bottom of the distillate column is heat-exchanged by an anhydrous tar / bitumen heat exchanger to obtain a medium-temperature bitumen product of general quality, and the bitumen is heated by steam during the transmission and standing process. This method of heating and maintaining temperature is difficult. Meet the requirement of asphalt to maintain a temperature above 300°C

Method used

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  • A process for upgrading asphalt by flashing and maintaining pressure combined with electric tracing heating and maintaining temperature in retention tower

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Embodiment Construction

[0019] As shown in the figure: a process of flashing and maintaining pressure combined with retention tower electric tracing heating and maintaining temperature to modify asphalt, including the following steps:

[0020] 1) The raw material tar is extracted from the raw material tar storage tank 1 and then mixed with a solvent and stirred evenly. The homogenized tar is sent to a super centrifuge for separation of light and heavy components through a dehydration and deslagging pump, and the separated light and heavy components are separated into Light component storage tank 12 and heavy component storage tank 13;

[0021] The solvent in step 1) is light oil, washing oil or a mixed solvent of light oil and washing oil in any ratio, and the amount of solvent added is 15%-20% of the weight of the raw tar.

[0022] The centrifugal force during the centrifugation in the step 1) is 3000G, and the centrifugation is 1-5min.

[0023] In the step 1), after centrifugation of the raw mater...

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Abstract

The invention relates to a flashing and pressure holding combined retention tower electric tracing heating temperature holding modified pitch production technology. The production technology is a single-heat production technology, only one tube furnace is adopted for heating in the process, energy-saving effect is remarkable, and flashing separation and continuous heating temperature holding thermal polymerization are combined. Flashing separation is conducted firstly on pitch, then oxidization thermal polymerization is conducted by controlling electric heating temperature holding accurately, an obtained target product meets the requirement of the carbon industry for pitch better, cohesiveness is excellent during mixed kneading of a carbon element mixture, and coking value is higher after roasting.

Description

technical field [0001] The invention relates to the technical field of modified asphalt production, in particular to a process for modifying asphalt by flashing and maintaining pressure combined with electric tracing heating of a retention tower and maintaining temperature. Background technique [0002] Hard asphalt and modified asphalt are made from medium temperature asphalt after corresponding treatment. The production methods of modified asphalt using asphalt as raw material mainly include oxidative thermal polymerization, atmospheric pressure thermal polymerization, pressurized thermal polymerization, vacuum flash evaporation, etc. In the existing process, the raw material tar is centrifugally separated by a super centrifuge to remove coal dust, free carbon and water and then enters the dehydration tar tank. After ℃, it enters the dehydration tower, and the anhydrous tar dehydrated to less than 0.2% enters the convection section of the tube furnace and heats it to abou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10C3/00
CPCC10C3/00C10C3/002
Inventor 李毛周文生艾护民周云辉赵斌关九霞
Owner HENAN KAITAN NEW MATERIAL
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