Device and method for absorbing tail gas in air bromine blowing production

Abstract

A device and a method for absorbing tail gas in air bromine blowing production are used in air bromine blowing production. Two stages of alkali washing absorption towers are arranged, a liquid causticsoda absorption liquid automatically flows to the absorption towers from a high-level buffer tank by utilizing a liquid level difference and is sprayed, and the absorbed liquid alkali enters a liquidcaustic soda circulating tank and then is pumped to a top buffer tank in order to realize circulating absorption. The pipe diameter of the liquid caustic soda circulating pipeline is larger than that of a liquid caustic soda spraying pipeline, so that the amount of circulating liquid caustic soda in a buffer tank is larger than the self-flow, sufficient liquid alkali in the buffer tank is guaranteed, and the liquid caustic soda overflows back to the circulating tank through a bypass overflow port after being fully stored. By utilizing the liquid level difference, the alkali washing absorption towers are still kept in a normal running state after power failure, the problem that a large amount of tail gas is emptied to pollute air due to the fact that an emergency power failure circulatingpump stops running before transformation can be avoided, and meanwhile part of product losses can be avoided.

Description

[0001] Field [0002] The invention relates to a new method for transforming the tail gas absorption tower in the production of air blowing bromine to realize normal operation after emergency power failure. Background technique [0003] Bromine is a reddish-brown liquid with the molecular formula Br 2 , relative density 3.119 (20°C), boiling point 58.78°C, volatile, highly corrosive, slightly soluble in water, easily soluble in ethanol, ether, chloroform, carbon tetrachloride, kerosene and carbon disulfide and other organic solvents, also Soluble in hydrochloric acid, hydrobromic acid and bromine compound solutions. Bromine is an important chemical raw material, widely used in flame retardant, fire extinguishing agent, refrigerant, photosensitive material, medicine, pesticide, oil field and other industries. [0004] Air blowing bromine by acid method is a method of producing bromine. At present, most domestic production enterprises use air blow bromine by acid method. The ...

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Problems solved by technology

[0014] The present invention overcomes the deficiencies of the prior art, and provides a device and method for absorbing tail gas in air-blown bromine production, which effectively solves the environmental protection problem caused by the exhaustion of acid gas to the atmosphere after the emergency power failure of distillation exhaust tail gas, and realizes fully absorbed

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