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A reverse osmosis process for impregnating asphalt

A technology of reverse osmosis and asphalt, applied in the direction of pretreatment surface, device for coating liquid on the surface, coating, etc., can solve problems such as low quality of impregnated parts, achieve shrinkage and internal and external temperature difference, ensure impregnation quality, and realize consistent effect

Active Publication Date: 2020-04-07
SINOSTEEL NEW MATERIAL ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to address the deficiencies of the prior art and provide a reverse osmosis process for impregnating asphalt, which uses inert gas to maintain the impregnation pressure inside the impregnation tank and simultaneously cools the inside of the impregnation tank at a uniform speed with pressure in a stage cooling manner. , realize the close combination of asphalt and products while avoiding asphalt leakage, and solve the technical problem of low quality of dipping parts caused by asphalt leakage in the output process of dipping parts in the prior art

Method used

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  • A reverse osmosis process for impregnating asphalt
  • A reverse osmosis process for impregnating asphalt
  • A reverse osmosis process for impregnating asphalt

Examples

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Embodiment 1

[0031] A reverse osmosis process for impregnating bitumen, comprising the following steps:

[0032] (a) Asphalt extraction; heat the closed impregnation tank containing the product to be impregnated, heat up to 220-280°C, pressurize it to 20-25bar and maintain the pressure. After maintaining the pressure for a period of time, the Extract the remaining liquid asphalt in the impregnation tank; make the asphalt liquid at a temperature of 220-280°C, and impregnate the product to be impregnated in a closed environment with a pressure of 20-25bar. The pressure-holding and impregnation time is 10-23h, and the impregnation is completed Finally, the asphalt is extracted from the impregnation tank through an external pump, the purpose of which is to avoid the waste of asphalt caused by the solidification of excess asphalt at room temperature during the process of transferring the impregnated product to the next station;

[0033] (b) keeping the pressure and lowering the temperature, whi...

Embodiment 2

[0037] The inventor believes that in order to more clearly describe the technical solution disclosed in the present invention, according to the accompanying drawings figure 1 A reverse osmosis process for impregnating asphalt in this example is described.

[0038] A reverse osmosis process for impregnating bitumen, comprising the following steps:

[0039] (a) Asphalt extraction; heat the closed impregnation tank containing the product to be impregnated, heat up to 220-280°C, pressurize it to 20-25bar and maintain the pressure. After maintaining the pressure for a period of time, the Extract the remaining liquid asphalt in the impregnation tank; make the asphalt liquid at a temperature of 220-280°C, and impregnate the product to be impregnated in a closed environment with a pressure of 20-25bar. The pressure-holding and impregnation time is 10-23h, and the impregnation is completed Finally, the asphalt is extracted from the impregnation tank through an external pump, the purpo...

Embodiment 3

[0053] In order to further describe the technical solution disclosed in the present invention, as Figure 2-6 Shown, primary cooling system among the present invention comprises and comprises dipping tank 1, also comprises:

[0054] A drainage mechanism 2, the drainage mechanism 2 includes a drainage assembly A21 and a drainage assembly B22 communicating with the inside of the dipping tank 1, and the hot gas in the dipping tank 1 is transported through the drainage assembly A21 to The airflow generator 23 in the drainage assembly B22, the said drainage assembly B22 is communicated with the interior of the dipping tank 1; in this embodiment, the hot gas flow is a mixture of nitrogen and the gas generated during the dipping process;

[0055] The cooling mechanism 3, the cooling mechanism 3 includes a heat conduction component 31 arranged on the drainage component B22 to cool down the hot air flow in the drainage component B22 by means of heat transfer, and a heat conduction comp...

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Abstract

The invention relates to the technical field of artificial graphite production, in particular to an impregnating pitch reverse osmosis process. The impregnating pitch reverse osmosis process comprisesthe steps of pitch extraction, pressure maintaining temperature reduction and pressure maintaining cooling. A product in an impregnation tank is subject to impregnation through the pressurizing impregnation manner with the temperature ranging from 220 to 280 DEG C and the pressure ranging from 20 to 25 bar, remaining liquid-state pitch in the impregnation tank is extracted in an absorbing manner,meanwhile, inert gas is guided into the impregnating tank, the pressure in the impregnating is kept unchangeable, through the multi-segment cooling manner, the product in the impregnating tank is subject to cooling forming treatment, and an impregnating part enabling a product to be in tight combination with pitch is formed; through the inert gases, the interior of the impregnating tank is kept at the impregnating pressure, meanwhile, through the stage cooling manner, the interior of the impregnating is subject to uniform-speed under pressure cooling, tight combination of the pitch and the product is achieved, meanwhile, pitch outward leakage is avoided, and the technical problem that in the prior art, in the impregnating part outputting process, due to impregnating outward leakage, the quality of the impregnating part is reduced is solved.

Description

technical field [0001] The invention relates to the technical field of artificial graphite production, in particular to a reverse osmosis process for impregnating asphalt. Background technique [0002] At present, graphite production enterprises mainly use heat in and heat out in the impregnation process. The heat out mentioned here refers to pulling the impregnated product out of the impregnation tank above the softening point of the asphalt in the high temperature state. The asphalt has not cooled to the softening point during the output of the impregnated product at high temperature, but under the pressure impregnation system, once the furnace shutdown pressure is relieved, a large amount of asphalt will seep back to the product surface and form on the product surface. A layer of 3-5mm thick solid bitumen. As a result, the bitumen bonded to the surface of the product cannot be recycled, and the impregnation uniformity and depth of the bitumen will be affected. Contents...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05C11/10B05C9/12B05D3/00
CPCB05C9/14B05C11/1039B05D3/007
Inventor 黄岱李贺费勇
Owner SINOSTEEL NEW MATERIAL ZHEJIANG