Asphalt desulfurization device and method

Abstract

The invention relates to an asphalt desulfurization device and method. The asphalt desulfurization device comprises a desulfurization tank, a regeneration tank, a precipitation tank and a standing tank, wherein a desulfurization pipe and a desulfurized gas outlet are arranged above the desulfurization tank; a spraying nozzle is arranged at the lower section of the desulfurization pipe; the spraying nozzle is connected with an outlet of a high-pressure circulating water pump through a pipeline; an inlet of the high-pressure circulating water pump is connected with the standing tank through a pipeline; the method comprises the following steps: carrying out chemical desulfurization and carrying out photocatalytic desulfurization; conveying desulfurized gas, gas generated by regeneration and residual gas generated in a precipitation process into a photocatalytic device through an exhausting pipe and carrying out secondary desulfurization; then discharging gas subjected to two times of desulfurization into the atmosphere. According to the asphalt desulfurization device and method, provided by the invention, chemical and photocatalytic two-grade desulfurization is carried out and the desulfurization effect is remarkable; the desulfurization tank utilizes a power principle and the contact area between desulfurized liquid and flue gas is large and the reaction effect is good; a desulfurization agent can be circularly utilized after being regenerated and resultants are simple and can be effectively reutilized according to actual conditions, so that secondary environment pollution isnot caused.

Description

technical field [0001] The invention relates to the technical field of asphalt treatment, in particular to an asphalt desulfurization device and method. Background technique [0002] In the production process of asphalt-based waterproof materials, asphalt and various modifiers, additives, fillers, etc. need to be heated and stirred according to different formulas, and then pumped to the production line through pipelines. During this process, a large amount of asphalt smoke will be generated. , this kind of smoke not only has an unpleasant smell, but also some compounds in it are harmful to human health, such as carcinogens such as benzopyrene, benzanthracene, and carbazole contained in asphalt smoke, and the current preparation of asphalt-based waterproof materials All are equipped with dust removal equipment, such as bag filter, etc., which are discharged into the atmosphere after passing through the bag filter. At present, the asphalt flue gas desulfurization step is to re...

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Problems solved by technology

[0002] In the production process of asphalt-based waterproof materials, asphalt and various modifiers, additives, fillers, etc. need to be heated and stirred according to different formulas, and then pumped to the production line through pipelines. During this process, a large amount of asphalt smoke will be generated. , this kind of smoke not only has an unpleasant smell, but also some compounds in it are harmful to human health, such as carcinogens such as benzopyrene, benzanthracene, and carbazole contained in asphalt smoke, and the current preparation of asphalt-based waterproof materials All are equipped with dust removal equipment, such as bag filter, etc., which are discharged into the atmosphere after passing through the bag filter. At present, the asphalt flue gas desulfurization step is to remove large particles of dust with the bag filter, and then use limestone wet desulfurization. The absorbent is cheap It is easy to obtain, but the infrastructure overdraft is large, the water consumption is large, and it cannot be reused. The calcium sulfate produced is unstable and easy to volatilize sulfur dioxide again. At the same time, calcium sulfate and calcium carbonate are not easy to separate, and the product cannot be effectively used.

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