Direct combustion type efficient and energy-saving humidity control denitration catalyst drying system

Abstract

The invention relates to a direct combustion type efficient and energy-saving humidity control denitration catalyst drying system, and belongs to the technical field of denitration catalyst productionequipment. The direct combustion type efficient and energy-saving humidity control denitration catalyst drying system comprises a primary drying chamber, a combustion control system and a humidification control system are connected to an inlet of the primary drying chamber, a circulating fan and a dehumidifying fan are connected to an outlet of the primary drying chamber, the top of a combustor is connected with a natural gas pipeline, and the bottom of the combustor is connected with a combustion chamber; the top of a humidifying atomization device is connected with a water supplying water pipe, and the bottom of the humidifying atomization device is connected with the combustion chamber; an outlet of the circulating fan is connected with the combustion chamber and the dehumidifying fan,and the dehumidifying fan is directly evacuated; and the primary drying chamber is provided with a humidity detector and a temperature detector. According to the technical scheme, the direct combustion type efficient and energy-saving humidity control denitration catalyst drying system has the beneficial effects that no heat loss of a steam pipeline is generated, and the heat utilization efficiency is nearly 100%; heat generated through combustion of the combustor and jetted water form flue gas containing specific humid and heat and enter the primary drying chamber together, safety and reliability are achieved, the problem that the temperature and the humidity are difficult to control is solved, and the catalyst finished product rate is guaranteed; and the automation degree is high, and operation is easy.

Description

technical field [0001] The invention relates to a direct-fired high-efficiency energy-saving humidity control denitrification catalyst drying system, which belongs to the technical field of denitrification catalyst production equipment. Background technique [0002] In recent years, my country's industrialization process has accelerated, and environmental problems have gradually become prominent, especially acid rain, photochemical smog, and water eutrophication caused by excessive nitrogen oxide emissions. Among them, a large part of nitrogen oxides comes from flue gas emissions. Therefore, it is urgent to remove nitrogen oxides in flue gas. At present, the advanced technology for removing nitrogen oxides is selective catalytic reduction technology (SCR denitrification technology), the core of which lies in the preparation of honeycomb catalysts. [0003] The preparation of honeycomb denitrification catalyst mainly includes the processes of material mixing, aging, pre-ext...

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Problems solved by technology

However, this drying method has many disadvantages, including low thermal efficiency and a comprehensive heat utilization rate of 15%; steam humidification is prone to safety accidents, and the specific performance is: the humidity adjustment of the oven is achieved by adding supersaturated steam at 180 degrees in front of the heat exchanger , and realized by pneumatic valve adjustment; although this adjustment method has rapid feedback, it is also prone to safety problems, especially when the pneumatic valve fails to close, the steam will carry a large amount of heat into the oven, resulting in a sharp rise in the temperature of the oven , ranging from damaging the catalyst to causing fire and other safety accidents

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