Liquid chlorine gasification device and gasification method

Abstract

The present invention belongs to a gasifying device and a gasifying method for the chlorine-alkali and chlorine product chemical industry to transform the liquid chlorine to the chlorine gas (raw gas). The device comprises a cylindrical shaped tower body which is provided with a gasifying cavity with a hot water circulation chamber and a gasifying pipe group as well as a gas-liquid separating cavity, a raw liquid chlorine cavity is arranged in the cylindrical shaped tower body; a chlorine gas output pipe provided with a temperature display device and a low temperature alarm device, the chlorine gas output pipe is arranged on the top of the column body; a liquid chlorine input pipe with a liquid chlorine transfer valve and a switch valve, the liquid chlorine input pipe is arranged on the bottom of the column body, a liquid level meter; a signal acquisition controller; a switch valve controller; and an auto regulation mechanism of a hot water input valve and a liquid chlorine input valve and a corresponding valve opening; and a pressure meter. The method of the liquid chlorine gasifying includes readiness for operation, debugging operation and automatic operation. The present invention stops the explosion caused by the accumulation of NC13 in the gasifying cavity and improves the gasifying efficiency because of adding the raw liquid chlorine cavity and adopting the gasifying pipe group to gasify; the present invention has the advantages that the gasifying process is safe and reliable, the performance is stable, the accommodation limit is wide, and the gasifying efficiency is high.

Description

technical field [0001] The invention belongs to a gasification device for converting liquid chlorine into chlorine gas (raw material gas) in the chemical industry of chlor-alkali and chlorine products and a method for gasifying liquid chlorine by using the device. Background technique [0002] The raw material chlorine gas required by the chlor-alkali industry and some chlorine product industries must be high-purity chlorine gas obtained by liquefying and refining the chlorine gas obtained by electrolysis, and then gasifying the liquid chlorine. Among them, the liquefaction of electrolytic chlorine gas is a mature technology, and the gasification of liquid chlorine into chlorine gas is often caused by NCl during the gasification process. 3 Accumulation presents a risk of explosion. Chlor-alkali and other industries have frequent explosion accidents due to gasification equipment, and once an explosion accident occurs, it will cause equipment damage and staff casualties, or c...

AI Technical Summary

Problems solved by technology

Therefore, this type of gasifier has the following defects: First, the gasification efficiency is low. For example, to provide 10t / h of gasified chlorine gas, 15 sets of gasifiers with an inner diameter of Φ1200 and a height of 2.2m and a gasification capacity of 1t / h are required; The first is poor safety and reliability, the operation and management are difficult, and the operators are under great mental pressure. Most of the safety accidents are caused by this type of gasifier; the third is the waste of resources. Generally, 75% of residual liquid chlorine is discharged for every 30t of gasification. 100kg and need 92~123kg caustic soda for treatment, when NCl in the raw material 3 When the content is higher, the waste of resources is more serious

But the shortcoming of this gasification device is: due to the use of an integrated liquid chlorine and its gasification chamber, the double-layer casing group inserted into the chamber is used as a hot water circulation heating pipe, and the upper surface area and lower cross-sectional area of ​​liquid chlorine are relatively large. Large, but the heat transfer area is relatively small, that is, the heat transfer intensity is small, the rising speed of the bubbles during the gasification process and the upward speed of the chlorine gas after the bubble burst are slow, so the NCl taken away with the gasification gas 3 The amount is less, that is, the NCl in the gasified chlorine gas 3 low concentration

In order to make the NCl contained in the input raw material liquid chlorine 3 The amount will not be higher than the NCl taken away by chlorine gas after gasification 3 In addition, the liquid chlorine in the gasification device enters from one side, and the NCl in the liquid chlorine in the gasification chamber 3 The uneven concentration also reduces the NCl carried away in the gasification gas 3 The amount, so the gasifier requires the NCl in the feed liquid chlorine 3 The concentration must be 3 The concentration rises sharply, and it is also easy to cause an explosion accident

Therefore, the gasification device has disadvantages such as high requirements on the purity of raw material liquid chlorine, narrow application range, low gasification efficiency and potential safety hazards.

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