Iron-molybdenum method formaldehyde flue gas waste heat recycling device and implementation method thereof

Abstract

The invention discloses an iron-molybdenum method formaldehyde flue gas waste heat recycling device which comprises a heat exchange kettle, a conveying pump and a storage tank, an air exhaust motor in an air supply assembly drives air exhaust fan blades to rotate, bubbling holes in a bubbling pipe are used for bubbling into cooling water on the outer side, a stirring shaft and stirring blades are used for fully stirring and exchanging heat, hot water is conveyed in the storage tank for storage, then different types of equipment is heated through a steam heat supply pipeline by directly opening a steam release port and directly connecting the steam release port with the steam heat supply pipeline, and heat exchange liquid with different temperatures is added into a kettle shell, so that steam is bubbled into the heat exchange liquid through bubbling holes; most of the steam is subjected to partial heat exchange and then enters the steam heat supply pipeline through the steam release port to supply heat to the equipment, so that heat recovery and reutilization of formaldehyde flue gas are effectively realized, and meanwhile, selective adjustable heat supply to different types of equipment or processing sections is realized after partial heat exchange is performed on the steam.

Description

technical field [0001] The invention relates to the technical field of formaldehyde preparation, in particular to an iron-molybdenum process formaldehyde flue gas waste heat recycling device and an implementation method thereof. Background technique [0002] Formaldehyde is an organic chemical substance with a chemical formula of HCHO and a molecular weight of 30.03. It is also known as formic aldehyde. It is a colorless and irritating gas that can irritate human eyes and nose. The production methods of formaldehyde appear as follows according to different raw materials. There are three types, non-catalytic oxidation method using liquefied petroleum gas as raw material, dimethyl ether oxidation method, methane oxidation method, methanol air oxidation method and iron-molybdenum method, among which the iron-molybdenum method can make methanol catalyze under the condition of excess air The reaction generates formaldehyde. The conversion rate of formaldehyde generated by this me...

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Problems solved by technology

[0002] Formaldehyde is an organic chemical substance with a chemical formula of HCHO and a molecular weight of 30.03. It is also known as formic aldehyde. It is a colorless and irritating gas that can irritate human eyes and nose. The production methods of formaldehyde appear as follows according to different raw materials. There are three types, non-catalytic oxidation method using liquefied petroleum gas as raw material, dimethyl ether oxidation method, methane oxidation method, methanol air oxidation method and iron-molybdenum method, among which the iron-molybdenum method can make methanol catalyze under the condition of excess air The reaction generates formaldehyde. The conversion rate of formaldehyde generated by this method is high, and there is no need to set up a separate formaldehyde separation and recovery equipment for recovery. At the same time, the reaction temperature is 250-400 ° C, and the reaction temperature is low and easy to control. Iron molybdenum is used In the process of preparing high-concentration formaldehyde by the method, high-temperature steam will be generated, and the temperature of the generated formaldehyde is also high, and the temperature in the high-temperature steam and high-temperature formaldehyde flue gas cannot be recovered and cannot be recycled, resulting in a waste of resources

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