A methanol oxidizer in a silver method formaldehyde plant

Abstract

The invention discloses a methanol oxidizer in a silver-method formaldehyde device, which comprises a tank body (1), a silver catalyst layer (2) and a cooling pipe (3). The cooling pipe (3) is arranged in the tank body (1). The side of the lower part of the tank body (1) is provided with a feed inlet, the silver catalyst layer (2) is arranged at the feed inlet, the upper part of the tank body (1) is provided with a formaldehyde outlet (4), the feed inlet and the formaldehyde outlet (4 ) are connected with the tank (1). The methanol oxidizer in the novel silver method formaldehyde device of the present invention changes the feed port from the top of the methanol oxidizer to the side of the tank body of the methanol oxidizer, which can greatly increase the reaction area of ​​methanol and the silver catalyst and improve the reaction efficiency, thereby The volume of the methanol oxidizer can be reduced.

Description

technical field [0001] The invention relates to a methanol oxidizer in a silver method formaldehyde device. Background technique [0002] During the production of formaldehyde by the silver method, the chemical reactions in the methanol mixed gas reoxidizer are mainly as follows: [0003] oxidation reaction [0004] CH 3 OH+1 / 2O 2 →CH 2 O+H 2 O (1) [0005] dehydrogenation reaction [0006] CH 3 OH→CH 2 O+H 2 (2) [0007] The chemical equation of the side reaction in the reaction process: [0008] CH 3 OH+3 / 2O 2 →CO 2 +2H 2 O (3) [0009] CH 3 OH→CO+2H 2 O……… (4) [0010] CH 3 OH+H 2 →CH 4 +H 2 O……… (5) [0011] CH 3 OH+O 2 →HCOOH+H 2 O (6) [0012] At present, the traditional oxidizer in the formaldehyde industry is a vertical cylindrical device, which can generally be divided into three sections from top to bottom: the upper section is the top cover of the oxidizer; the middle section is the combination of the catalyst chamber and the quenching...

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Problems solved by technology

[0017] e. Fatal flaws of traditional oxidizers: 1. The oxidizer is a vulnerable part, which needs to be replaced in about 3 years, and the cost is high; 2. The maximum production capacity of the oxidizer can only reach 120,000 tons, and the large-scale formaldehyde plant is fatally affected. Constraints; 3. The transportation process is limited, and the design of the 120,000-ton formaldehyde plant is almost the largest; 4. The unit consumption of large-scale oxidizers is high and the operation is difficult

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