Heat treatment spent liquor salt recovery processing method and apparatus

Abstract

The invention relates to a recycle processing method for heat treating waste liquid salts and a device thereof. The recycle processing method for heat treating waste liquid salts comprises following steps: (1) a high liquid level and a low liquid level of a heating slot of salt recycling are set; (2) a mixed liquid of salt and water for cleaning a water slot is pumped into the heating slot of salt recycling, and when the temperature of the mixed liquid of salt and water is raised over 100 DEG C, the water in the mixed liquid evaporates into water vapor which is cooled into water and returned back into a cleaner for recycling; (3) when the liquid level decreases to the low liquid level, a salt discharging valve is opened, and salt solution enters a salt storing slot for cooling and recycling. The specialized device is characterized that the specialized device comprises the cleaning slot (1), a heating device of salt recycling (2) and a condenser (3); a water inlet end of the heating device of salt recycling is connected with the cleaning slot, an air outlet end of the heating device of salt recycling is connected with an air inlet end of the condenser, and the water outlet end of the condenser is connected with the water inlet end of the cleaning slot; a salt discharging port and a valve are arranged in the bottom of a shell, the storing slot of salt recycling is arranged under the shell. The recycle processing method for heat treating waste liquid salts and the device thereof realize non-discharging of sewage and have the advantages of saving water resource, recycling waste salts and lowering cost.

Description

technical field [0001] The invention relates to a heat treatment waste liquid salt recovery treatment method and device, which is suitable for a waste liquid recovery treatment system in the quenching heat treatment process. It belongs to the technical field of metal heat treatment equipment. Background technique [0002] Quenching is a metal heat treatment process in which a metal workpiece is heated to an appropriate temperature and maintained for a period of time, and then immersed in a quenching medium for rapid cooling. Commonly used quenching media are brine, water, mineral oil, air, etc. Quenching can improve the hardness and wear resistance of metal workpieces, so it is widely used in various tools, molds, measuring tools and parts that require surface wear resistance (such as gears, rolls, carburized parts, etc.). According to the cooling method, the quenching process is divided into four types: single liquid quenching, double medium quenching, martensite graded q...

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Problems solved by technology

[0003] The first object of the present invention is to provide a method for recovering heat treatment waste liquid salt in order to overcome the shortcomings of serious pollution, waste of resources and high production cost in the existing quenching heat treatment process

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