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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, applied in the direction of curing/crushing processing tar pitch/petroleum pitch/natural pitch, etc., can solve the problem that the worker's operating environment cannot be completely improved, and achieves fewer times, stable and reliable system, and guaranteed safety. production effect

Inactive Publication Date: 2012-03-07
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
  • Method for solving polluted environment form coal tar smoke by molding, granulating coal tar under water

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Embodiment Construction

[0018] The detailed description is given below according to the process flow chart.

[0019] 1. Asphalt preparation

[0020] The liquid bitumen above 250°C from the distillation system enters the bitumen product tank 1, and the bitumen in the bitumen product tank 1 is partially fed to the bitumen cooler through the bitumen circulation pump 2 to keep the bitumen liquid level at the bottom of the bitumen cooler constant, and the other part , recycled back to the asphalt product tank 1 for mixing. The temperature in the bitumen product tank 1 is kept above the critical value (ie above 220°C) by the circulation of the hot fluid (such as heat transfer oil) in the internal heating system. The pumped, internal heating system consists of heating pipes mounted on the center bottom and circumference of the asphalt product tank. The pitch product tank 1 realizes the liquid pitch above 250°C from the distillation system, and uses the thermal fluid carrier to cool the coal pitch to 220°C...

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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 provides a method for solving the environmental pollution of coal tar fume by underwater forming and granulation of coal tar pitch, and relates to the technical field of solving the environmental pollution of coal tar tar fume, in particular to the bitumen fume produced when coal tar pitch is discharged. Background technique [0002] As the asphalt smoke contains benzopyrene, an organic compound with obvious carcinogenic effect, when the content reaches a certain level, it is very harmful to the human body. Therefore, asphalt fume must be treated in the coal tar processing environment. At present, there are usually five methods for treating asphalt fume, namely: water washing method, oil washing absorption method, electrostatic fluttering 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 m...

Claims

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Application Information

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Patent Type & Authority Patents(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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