Hydrochloric acid absorption tower and process for producing hydrochloric acid for production

Abstract

The invention relates to a hydrochloric acid absorption tower and a process for producing hydrochloric acid for production. The absorption tower comprises a heat exchanger, a first vacuum pump, a circulating pump, a hydrochloric acid storage tank, a tail gas buffer tank, a falling film absorber, a first hydrochloric acid tank, a second hydrochloric acid tank, a second vacuum pump, an absorption tower and a tail gas chimney. The process for producing the hydrochloric acid for production comprises the following steps: buffering, primary absorption, secondary absorption, circulating absorption and storage. The absorption tower and the process have the advantages that the environment pollution is reduced, the waste is changed into valuable, the economic benefit is produced, and the process is compact and simple to operate.

Description

technical field

[0001] The invention relates to a hydrochloric acid absorption tower, in particular to a process for generating hydrochloric acid for production from hydrochloric acid-containing process wastewater in the production process. Background technique

[0002] In the process of preparing olefin polymerization catalysts, solvent oils (such as decane, kerosene, vaseline, white oil, silicone oil) and titanium tetrachloride need to be used in large quantities and excessively. From an economic point of view, they must be recycled. In the process of recovering solvent oil, because it contains ≤2% titanium tetrachloride when washing titanium tetrachloride, it needs to be washed with water to remove impurities. When titanium tetrachloride meets water, the water will produce waste water containing weak hydrochloric acid. The conventional method is to neutralize Discharge or recycling after treatment, discharge wastes resources, and recycling wastes manpower and material res...

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