Anhydrous sodium sulfate preparation method and anhydrous sodium sulfate preparation apparatus

Abstract

The invention discloses an anhydrous sodium sulfate preparation method and an anhydrous sodium sulfate preparation apparatus, and belongs to the anhydrous sodium sulfate preparation field. The method sequentially comprises the following steps: processing a raw sodium sulfate solution to prepare a fine sodium sulfate solution; dehydrating the fine sodium sulfate solution to prepare dry sodium sulfate; and processing the dry sodium sulfate to prepare finished sodium sulfate. The preparation apparatus comprises a nitrate solution reaction clarifier, a slurry clarifier, a non-valve filter, a rotary drum vacuum filter, a fine sodium sulfate solution storage device, a steam generation device, a multiple-effect evaporator, a centrifuge, an atmospheric condenser, a cooling tower, a cycle water pump, a Roots water ring vacuum set, a hot air drying device, a convey device, a pneumatic elevator, a nitrate storage bin and a cloth bag deduster. According to the invention, the sodium sulfate solution refining efficiency is high, the sodium sulfate solution quality is good, and the sodium sulfate solution is fully recycled; and the heat energy utilization rate in the production process is high, the production energy consumption is low, and the finished sodium sulfate has a fast convey speed and a high output.

Description

technical field [0001] The invention belongs to the field of preparation of Yuanming powder. Background technique [0002] At present, the production process used in the manufacture of sodium sulfate has a large waste of nitric water, high energy consumption, high equipment maintenance costs, and easy environmental pollution in the production process. The concrete steps of its preparation method are: [0003] 1. First, preheat the raw nitric water from the mine to remove impurities. The treated nitric water is clarified by a slanting plate clarifier, then the suspended solids are removed by a sand filter, and then pumped into a bucket of refined nitric acid; [0004] 2. At present, there are two main ways to deal with the calcium-magnesium mud clarified by the inclined plate clarifier: the first way is to discharge it directly to the waste water pool and beat it to the mine; the second way is to process the calcium-magnesium mud through a plate and frame filter press. Soli...

AI Technical Summary

Problems solved by technology

[0010] 1) Since the system needs to consume steam during operation, the energy consumption is relatively large;

[0011] 2) The equipment is easy to corrode in the actual production process, and it is prone to vacuum leakage, which will affect the production

[0012] 3. For the conveying process of finished nitrate, the current common method is belt conveyor trestle. The main defect of this method is that the leather transportation process occupies a large area, the investment cost is high, and the fine nitrate dust is easy to pollute the environment during delivery.

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