Equipment special for producing bulk wet salt by using sodium sulfate type brine

Abstract

The invention relates to equipment special for producing bulk wet salt by using sodium sulfate type brine. The equipment comprises a multi-stage preheater, an autoclave and a vapor compression system; a salt slurry outlet of the autoclave is communicated with salt centrifugal dehydration equipment; the equipment also comprises an energy saving device, a salt-making vaporizing tank and a nitre-making vaporizing tank which are communicated through a pipeline; a brine outlet of the autoclave is communicated with a brine inlet of the energy saving device; a brine outlet of the energy saving device is communicated with a brine inlet of the salt-making vaporizing tank; a brine outlet of the salt-making vaporizing tank is communicated with a brine inlet of the nitre-making vaporizing tank; a salt slurry outlet of the salt-making vaporizing tank is communicated with the salt centrifugal dehydration equipment; a nitre slurry outlet of the nitre-making vaporizing tank is communicated with nitre centrifugal dehydration equipment; and a brine outlet of the nitre-making vaporizing tank is communicated with the brine inlet of the energy saving device. The equipment special for producing the bulk wet salt by using the sodium sulfate type brine is provided with the salt-making vaporizing tank and the nitre-making vaporizing tank for salt-nitre separation, the salt-making and nitre-making efficiency is improved, and the energy saving device is adopted for recycling heat.

Description

technical field [0001] The invention relates to the technical field of salt salt preparation, in particular to a special equipment for producing loose wet salt from sodium sulfate type brine. Background technique [0002] Existing preparation process [0003] For sodium sulfate type brine, the production process commonly used now is: multi-effect vacuum evaporation + mother liquor recovery process. Several sets of salt and nitrate cogeneration production devices with an annual production capacity of 100,000 tons, 200,000 tons and 300,000 tons have been introduced in China. The operation is basically stable, but the energy consumption is relatively high. [0004] 1.1 Process steps of multi-effect vacuum evaporation + mother liquor recovery [0005] Such as figure 1 The schematic diagram of the process flow is shown. The system adopts vacuum salt production + mother liquor recovery process. The evaporation system includes a first-effect evaporation tank, a second-effect eva...

AI Technical Summary

Problems solved by technology

[0015] 1.4.3 Multi-effect evaporation consumes more energy than hot-pressed salt:

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