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Method for solving polluted environment form coal tar smoke by molding, granulating coal tar under water

A technology that pollutes the environment and coal tar pitch is applied in the direction of solidification/crushing and processing tar pitch/petroleum pitch/natural pitch, etc. It can solve the problem that the operating environment of workers cannot be completely improved, and the number of times achieved is reduced, the system is stable and reliable, and safety is guaranteed. The effect of production

Inactive Publication Date: 2007-10-10
SHANDONG IRON & STEEL CO LTD
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Problems solved by technology

At present, there are usually five methods for controlling asphalt fume, namely: water washing method, oil washing absorption method, electrostatic puffing method, adsorption method and incineration method. These methods only solve the asphalt fume generated from the top of the tank. However, it cannot fundamentally solve the asphalt smoke during asphalt molding, so the operating environment of workers cannot be completely improved, which is also an important factor restricting the coal tar processing environment.

Method used

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  • Method for solving polluted environment form coal tar smoke by molding, granulating coal tar under water

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Embodiment Construction

[0018] The following is a detailed description according to the process flow chart.

[0019] 1. Asphalt preparation

[0020] Liquid asphalt above 250°C from the distillation system enters the asphalt product tank 1, and part of the asphalt in the asphalt product tank 1 is fed to the asphalt cooler through the asphalt circulation pump 2 to keep the asphalt liquid level at the bottom of the asphalt cooler constant. , recycled back to the bitumen product tank 1 mix. The temperature in the asphalt product tank 1 is maintained above the critical value (ie above 220°C) by circulating thermal fluid (such as heat transfer oil) in the internal heating system. The pumped, internal heating system consists of heating tubes installed in the center bottom and circumference of the bitumen product tank. The bitumen product tank 1 realizes the liquid bitumen above 250°C from the distillation system, and cools the coal tar pitch to 220°C-250°C by using a hot fluid carrier.

[0021] 2. Liquid...

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Abstract

This invention relates to a method for molding and granulating coal tar pitch under water, which can solve the environmental pollution problem caused by coal tar pitch fume. The method comprises: (1) pre-cooling coal tar pitch to 220-250 deg.C with a hot fluid carrier; (2) further cooling coal tar pitch to 130-150 deg.C with a coal tar pitch cooler; (3) pumping cooled coal tar pitch into a granulator by a flow pump, and granulating by the granulator under water; (4) molding and granulating, and circulating the cooling water. The method can avoid coal tar pitch fume in the storage tank or produced by coal tar pitch discharge, thus improve the operation conditions. The method is suitable for treating coal tar pitch fume during coal tar processing.

Description

technical field [0001] The invention relates to a method for solving coal tar smoke pollution environment by coal tar pitch underwater molding and granulation, and relates to the technical field of solving coal tar pitch pollution environment, especially the pitch smoke generated when coal tar pitch is discharged. Background technique [0002] Because asphalt smoke contains benzopyrene, an organic compound with obvious carcinogenic effect, it will be very harmful to the human body when the content reaches a certain level. Therefore, the asphalt fume must be controlled in the coal tar processing environment. At present, there are usually five methods for controlling asphalt fume, namely: water washing method, oil washing absorption method, electrostatic puffing method, adsorption method and incineration method. These methods only solve the asphalt fume generated from the top of the tank. However, it cannot fundamentally solve the asphalt smoke during asphalt molding, so the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10C3/16
Inventor 温燕明朱玉廷康春清谭树峰蒋升华朱从文齐婳周波
Owner SHANDONG IRON & STEEL CO LTD
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