Manufacturing process of coarse grained thenardite

Anhydrous Glauber's Salt, a manufacturing process technology, applied in the direction of inorganic chemistry, alkali metal sulfite/sulfite, alkali metal compounds, etc., can solve the problems of shortened production process, excessive storage equipment, etc., and achieve the distribution of filter pores Reasonable, shortened process flow, beneficial to environmental protection

Inactive Publication Date: 2012-04-04
四川川眉特种芒硝有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The purpose of the present invention is to study a manufacturing process of coarse-grained anhydrous thenardite, so that it can overcome the shortcomings of the existing thenardite production technology, have a more ideal unit production capacity under the premise of ensuring high product purity, and overcome the thenardite production process. Shortcomings such as too much storage equipment in the middle, so that the production process is shortened

Method used

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  • Manufacturing process of coarse grained thenardite
  • Manufacturing process of coarse grained thenardite
  • Manufacturing process of coarse grained thenardite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Example 1: Under the monitoring of the DCS automatic monitoring system and the control of the AK liquid balance flowmeter, the raw nitric water with a concentration of 24°Bé transported down the well is obtained by removing mechanical impurities through a first-stage pipeline filter, and refining and purifying by a four-stage ion exchanger. Refined nitric water with extremely low impurity content is input into the continuous crystallization process system. In the continuous crystallization system, there are heat exchangers, crystallizers and thickener equipment. Refined nitric water is heated with 1°C cold water in the heat exchanger. Exchange to form a supersaturated solution containing 20% ​​sodium sulfate crystals—grain slurry; the crystal slurry is input from the bottom of the crystallizer, and the crystal grows in the crystallizer to an average particle size of 2mm, thereby forming a 35% crystal slurry. The supernatant solution containing sodium sulfate in the upper...

Embodiment 2

[0040] Example 2: Under the monitoring of the DCS automatic monitoring system and the control of the AK liquid balance flowmeter, the 24Be concentrated raw nitric water transported down the well is removed through the three-stage pipeline filter to remove mechanical impurities, and the eight-stage ion exchanger is refined and purified to obtain extremely low The refined nitric water with impurity content is input into the continuous crystallization process system. In the continuous crystallization system, there are heat exchangers, crystallizers, thickeners and other equipment. The refined nitric water exchanges heat with cold water at 3°C ​​in the heat exchanger. , to form a supersaturated solution containing 20% ​​sodium sulfate crystals—the crystal slurry mixture; the crystal slurry is input from the bottom of the crystallizer, and the crystal grows in the crystallizer to an average particle size of 3mm, thereby forming a 40% crystal slurry, The saturated solution containing...

Embodiment 3

[0041] Embodiment 3: Under the monitoring of the DCS automatic monitoring system and the control of the AK liquid balance flowmeter, the raw nitric water with a Be concentration of 24-30 ° sent down the well is removed through a three-stage pipeline filter to remove mechanical impurities, and an eight-stage ion exchanger is refined and purified. The refined nitric water with extremely low impurity content is processed and input into the continuous crystallization process system. There are heat exchangers, crystallizers and thickeners in the continuous crystallization system. Cold water is used for heat exchange to form a supersaturated solution containing 15% sodium sulfate crystals—grain slurry; the crystal slurry is input from the bottom of the crystallizer, and the crystals grow to an average particle size of 2.5mm in the crystallizer, thereby forming 37% sodium sulfate. The crystal slurry, the saturated solution containing sodium sulfate in the upper part returns to the hea...

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Abstract

The invention discloses a manufacturing process of coarse grained thenardite, which is characterized in that under the monitoring of a DCS automatic monitoring system and the control of AK liquid balancing flow-rate meter, raw glass gall with a given concentration which is conveyed in the well is mechanically removed foreign matters by a primary pipeline filter and is precisely purified by a four-stage ion exchanger to obtain refined glass gall with low content of foreign matter, after pH value of the refined glass gall is adjusted, the refined glass gall is inputted to a continuous crystallization process system, after continuous solid-liquid separation in a primary centrifugal, the refined glass gall is re-inputted to a multilevel screw-type vacuum dryer to be dried and dehydrated and then to be conveyed to a fluidized bed to be treated, and after mirabilite with coarse grain is separated, the coarse grained thenardite is obtained.

Description

Technical field: [0001] The invention belongs to the field of fine processing of inorganic chemicals, or the field of fine chemicals. Background technique: [0002] And anhydrous sodium sulfate is also called anhydrous nitrate, anhydrous Glauber's salt, Yuanming powder; white fine-grained crystal or powder, soluble in water, hygroscopic, odorless, non-toxic. [0003] Sodium sulfate can form heptahydrate and decahydrate, heptahydrate (Na 2 SO 4 ·7H 2 O) is a white orthorhombic crystal. When heated to 24.4 ° C, it turns into anhydrous. Sodium sulfate is reduced to sodium sulfide when it reacts with carbon at high temperature [0004] Therefore, it is widely used in the manufacture of sodium sulfide, sodium silicate, etc., and is also used in papermaking, glass, printing and dyeing, synthetic fiber, tanning, food, chemical and other processes. In addition, it is also used as an admixture for non-ferrous metal mineral processing, enamel, rubber, chemical fertilizers, and l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01D5/00
Inventor 苟兴无李春先李洪清张大明刘泽民李栋良刘文良
Owner 四川川眉特种芒硝有限公司
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